JPH11211639A - Tensile strength tester and method for tensile strength test - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tensile strength tester which can easily and surely screw a tension member to a screw member. SOLUTION: A tester 1B is provided with a hollow outer cylindrical member 5a fixing a seat part 47c butting with a base material, a hollow rotary shaft 3 rotatably held by the outer cylindrical member 5a, a tension shaft 9 coupled to a hexagonal head part 9a via a hexagonal-holed driving plate 8 so that a rotary force is transmitted from the rotary shaft 3 and, screwed at a leading end part of an axial part of a smaller diameter than the hexagonal head part 9a to a screw member, thereby applying a tensile force corresponding to a rotational angle to the screw member, and an elastic member 42 elastically holding the hexagonal head part 9a of the tension shaft 9 via a stop plug 13. When the screw member butts with the tension shaft 9, the tension shaft 9 having the hexagonal head part 9a held by the elastic member 42 retreats, thereby easing an impact at the butting and greatly increasing reliability in the screwing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tensile strength tester, and more particularly, to a tensile strength tester and a tensile strength tester capable of measuring the tensile strength when a screw member is pulled out from a base material to which the screw member is attached. About the method.

[0002]

2. Description of the Related Art Generally, when a screw portion is formed on a resin-formed product or a thin plate and other members are screwed together, in order to obtain a sufficient strength of these joined portions, the screw portion is formed as a separate member with a base material. For example, it is used as an insert nut for resin, a press caulking nut, or a welding nut by embedding, welding, press fitting, or the like. by the way,
Since the screw member joined to the base material as a separate member ensures the strength of the joint, it is necessary to conduct a joint strength test between the base material and the screw member. In the bond strength test, the base material is fixed, a tensile force is applied to the screw member, and the maximum bond strength, that is, the tensile force between the base material and the screw member, A tensile strength tester for measuring the strength is used.

As a conventional tensile strength tester of this type, for example, there is one as shown in FIG. In FIG.
Reference numeral 1 denotes a pull-out strength tester, for which, for example, an Amsler tensile tester is used although not shown in detail. An object to be measured 103 formed by injection molding is engaged with the fixing portion 102 of the pull-out strength tester 101, and a screw member 105 is embedded in a base material 104 of the object to be measured 103. That is, the DUT 1
03 is a case where the base member 104 and the screw member 105 are
It is cut out in advance to a size that can be mounted on the camera. At the time of measurement, a bolt 106 was screwed into the screw member 105, and a pull-up member 107 of a pull-out strength tester 101 was engaged with the bolt 106, and an upward force in FIG. A tensile force is applied in a direction in which the screw member 105 is pulled out of the device under test 103. Then, when the tensile force is increased, the screw member 105 is separated from the base material 104 and falls off, and the pull-out strength of the base material 104 and the screw member 105 is measured from the tensile force at the start of separation.

[0004]

However, in such a conventional tensile strength tester, since the pull-out strength tester 101 is a stationary Amsler tensile tester or the like, the following problems arise. there were.

That is, it is necessary to cut out the DUT 103 in advance in accordance with the fixed portion 102 to have a specific shape, so that the preparation work for the measurement becomes complicated, the setup takes time, and the measurement requires skill. . Furthermore, since the test device is a general-purpose device, there is a problem that it is expensive. Moreover, since the pull-out strength tester 101 is large and stationary, it is almost impossible to measure the pull-out strength of the base material 104 and the screw member 105 at the site of injection molding or the like. There was a problem of doing.

In particular, the measurement of the pull-out strength is intended to improve the quality by feeding back the measurement result to the product production process, and a pull-out strength tester which can be easily measured and inspected on site is demanded. Was. Further, it has been demanded that the tension member can be easily and surely screwed into the screw member.

It is an object of the present invention to provide a tensile strength tester and a tensile strength test method in which a tension member can be easily and reliably screwed to a screw member.

[0008]

In order to achieve the above object, a tensile strength tester according to claim 1 applies a tensile force to a base material on which a screw member is attached in a direction of pulling the screw member from the base material. In a tensile strength tester for testing a pull-out strength from a tensile force, an outer cylinder means for abutting on the base material, and a tensile force corresponding to a rotation angle at a tip end of which is screwed to the screw member, is applied to the screw member. A pulling means, a turning means for turning the pulling means with respect to the outer cylinder means, and a first means provided at the turning means and located at a base end of the pulling means. A second connecting portion for connecting to the connecting portion, an insertion portion for inserting the pulling means from a side opposite to the second connecting portion with respect to the rotation axis direction, and the pulling means being a screw member The screw member is arranged along the rotation axis when the screw member contacts Countercurrent to the pulling means to the opposite side is characterized in that it comprises a suppressing means for suppressing the movement.

A tensile strength tester according to a second aspect of the present invention is the tensile strength tester according to the first aspect, further comprising measuring means for measuring a tensile force generated by the tensile means.

A third aspect of the present invention is the tensile strength tester according to the first aspect, wherein the restraining means is an elastic member.

The tensile strength tester according to a fourth aspect of the present invention is the tensile strength tester according to the first aspect, wherein the first connection portion and the second connection portion are associated with the movement of the pulling means in the rotation axis direction. It is characterized in that it is provided with a separation preventing means for preventing the parts from separating from each other.

According to a fifth aspect of the present invention, there is provided a tensile strength tester according to the first aspect, wherein a distal end portion of the outer cylinder means in contact with the base material is magnetized or provided with a magnet. It is characterized by:

A tensile strength tester according to a sixth aspect of the present invention provides a tensile strength test for applying a tensile force in a direction in which the screw member is pulled out from the base material to which the screw member is attached, and testing the pull-out strength from the tensile force. The container has an outer cylinder unit, a rotation unit, a tension shaft, and an elastic unit, and (a) the outer cylinder unit has a hollow shape, and a tip portion of the outer cylinder unit contacts the base material. , (B) the tension shaft has a tip, a first connecting portion, and a shaft body; the tip has a threaded portion to be screwed with the screw member; The connecting part is
A protruding portion larger than the distal end portion is provided on a base end side of the tension shaft, the shaft body portion is disposed between the distal end portion and the protruding portion, and (c) the rotating unit has a hollow shape. The rotation unit is rotatably held in the outer cylinder unit, and the hollow shape of the rotation unit has an open port at at least one end, and the second connecting portion disposed inside the hollow shape is The first connection portion is connected to the first connection portion, and the tension shaft inserted from the opening connects the first connection portion and the second connection portion, and (d) the elastic unit is connected to the first connection portion. It has a contact portion and a fixed portion, the fixed portion is fixed to the rotating unit, the contact portion is abutted on the protrusion of the tension member, the elastic unit is the elastic member by the corresponding contact, the tension member When it comes into contact with the screw member, it moves upward along the rotation axis direction. It is characterized by suppressing by gender force.

A tensile strength tester according to a seventh aspect of the present invention is the tensile strength tester according to the sixth aspect, further comprising a measuring unit, wherein the measuring unit includes a first mounting portion, a second mounting portion, A body, and a sensor, wherein the first attachment is attached to the outer cylinder unit, and the second attachment is
The body is attached to the rotating unit, the body is disposed between the first attachment part and the second attachment part, and the sensor is attached to the body and generated on the body. It is characterized by measuring the distortion that occurs.

According to an eighth aspect of the present invention, in the tensile strength tester according to the seventh aspect, the body has a cylindrical shape and is disposed around the axis of the tensile axis. It is characterized by.

A tensile strength tester according to a ninth aspect of the present invention is the tensile strength tester according to the sixth aspect, wherein the tip is magnetized or a magnet is attached.

According to a tenth aspect of the present invention, in the tensile strength tester of the sixth aspect, the distal end is screwed to a main body of the outer cylindrical member. .

According to a tenth aspect of the present invention, in the tensile strength tester of the tenth aspect, a screw direction of the distal end portion and the body portion is opposite to a screw direction of the tensile shaft. And

A tensile strength tester according to a twelfth aspect of the present invention is the tensile strength tester according to the sixth aspect, further comprising a regulating member, wherein the regulating member has at least a regulation tip and a regulation fixing portion, The distance between the regulating tip of the regulating member and the end of the pulling member that is located on the opposite side in the rotation axis direction is equal to the time between the first connecting portion and the second connecting portion. The length is shorter than the coupling length in the moving axis direction, and the regulating and fixing portion is fixed to the rotating unit, and the elastic member follows the rotation of the rotating unit by the fixing.

A tensile strength tester according to a thirteenth aspect of the present invention provides a tensile strength tester for applying a tensile force in a direction in which a screw member is pulled out from a base material to which a screw member is attached, and measuring the pulling strength from the tensile force. In the vessel, an outer cylinder member, a tension shaft,
(A) having a rotating member, a hollow member, and a plug unit;
The outer cylinder member has a hollow shape, and a seating portion is held at a tip of the outer cylinder member and abuts on the base material,
(B) the tension shaft has a threaded portion, a shaft body, and a first connection portion, and the threaded portion is located at the tip of the tension shaft and near the seating portion, and And the shaft body portion is disposed between the screwing portion and the connection portion. The connection portion is larger than the shaft body portion and has a non-rotationally symmetric shape, and (c) the rotation The member is rotatably held in the outer cylindrical member, and has a cylindrical portion and a second connecting portion, wherein the cylindrical portion has a hollow shape, and the second connecting portion has a first connecting portion. And a second hole, wherein the first hole is formed of a hole into which the shaft body can be inserted, and the second hole is larger than the hole and the second hole. The first connecting portion is formed of a fitting hole having a slightly larger size than the first connecting portion, the fitting hole is fitted with the first connecting portion, and the second connecting portion is
The second hole is disposed at an end of the cylindrical portion so as to open toward the inside of the cylindrical portion, and (d) the hollow member includes a first mounting portion and a second mounting portion. And a hollow body, wherein the first mounting portion is mounted on the outer cylinder member on the inner surface of the outer cylinder member and in the seating direction, and the second mounting portion is formed on the shaft body portion. Abuts on the second connecting portion via a bearing disposed around the rotation axis of the hollow shaft, the hollow body portion is disposed around a rotation axis of the tension shaft, and the first mounting portion and the second mounting portion are connected to each other. (E) the stopper unit has a stopper body and an elastic part, the stopper body is fixed to the cylindrical part, and the elastic part has one end. Part is held by a fixed part, the other end abuts on a protrusion of the tension member, the fixed part is fixed to the rotating unit, and the rotating unit is fixed. The elastic member is driven in accordance with the rotation of the slot, so that when the tension shaft comes into contact with the screw member, the elastic force of the elastic portion increases above the tension shaft along the rotation axis direction. It is characterized in that the movement to the surface is suppressed.

According to a fourteenth aspect of the present invention, in the tensile strength tester of the thirteenth aspect, a displacement sensor is provided in the hollow body, and the displacement sensor measures a strain in the middle cavity. It is characterized by.

According to a fifteenth aspect of the present invention, in the tensile strength tester of the thirteenth aspect, the seating portion is opposite to a main body of the outer cylinder member in a direction opposite to a thread direction of the tension shaft. It is characterized by being screwed in the screw direction.

According to a tenth aspect of the present invention, in the tensile strength tester of the thirteenth aspect, a tip of the seating portion in contact with the base material is magnetized or provided with a magnet. It is characterized by.

According to a seventeenth aspect of the present invention, in the tensile strength tester of the thirteenth aspect, the plug unit further includes a regulating protrusion, and one end of the regulating protrusion is connected to the stopper body. The distance between the other end of the regulating protrusion and the first connecting portion is fixed to be greater than the fitting length of the first connecting portion and the second connecting portion in the rotation axis direction. It is characterized by being short.

A tensile strength tester according to claim 18 applies a tensile force in a direction in which the screw member is pulled out from the base material to which the screw member is attached, and measures the tensile strength from the tensile force. In the method, a tension shaft is inserted from the opening direction of the hollowed pivot member, the tension shaft is held against the pivot member, and the tension shaft abuts against the screw member, whereby: The tension shaft moves upward along the rotation axis direction, and at this time, the tension member is urged downward by the elastic member in the rotation axis direction, so that the rotation member is rotatable. Abuts the holding means held on the base material,
By rotating the rotating member with a driving member, a screw portion provided on the tension shaft is screwed to the screw member, and the screwing applies a pulling force corresponding to the rotation angle of the tension shaft to the screw member. It is characterized by communicating.

According to a nineteenth aspect of the present invention, in the tensile strength test method according to the eighteenth aspect, the tensile strength of the screw member with respect to the base material, which is generated by rotating the tensile axis, is further reduced. It is characterized by measuring.
Further, the tensile strength tester applies a tensile force in a direction of pulling out the screw member from the base material to the base material to which the screw member is attached, via a driving unit that drives a tensile member screwed into the screw member,
In a tensile strength tester for measuring a pull-out strength from the tensile force, a hollow outer cylindrical member for fixing a seating portion abutting on the base material, and a hollow rotating member rotatably held by the outer cylindrical member And the head is connected via a connecting means so that the turning power is transmitted from the turning member. And a resilient member for elastically holding the head of the tension member via a stopper plug.

With this configuration, when the screw member comes into contact with the tension member, the tension member whose head is held by the elastic member is retracted, so that the impact of the contact is reduced and the reliability of the screwing is greatly increased. To increase.

Further, in the tensile strength tester according to the first aspect of the present invention, the retracting amount of the tensile member is a retracting amount at which the seat attachment comes into contact with the base material.

In this configuration, the seat attachment can be brought into contact with the base material.

In the tensile strength tester according to any one of claims 1 to 2, the stopper is provided with a regulating means for regulating the amount of retraction of the tension shaft. And

In this configuration, the amount of retraction of the tension shaft can be regulated by the regulating means.

The tensile strength tester according to the second or third aspect is characterized in that at least the tip of the seat attachment is a magnet.

In this configuration, when the seat attachment is brought into contact with the base material and after the seat attachment is brought into contact with the base material, the leading end of the seat attachment is sucked by the base material, so that the setting property of the seat attachment to the base material can be improved.

Further, the tensile strength tester according to any one of claims 1 to 4, wherein at least the tip of the tensile shaft is magnetized.

In this configuration, since the tip of the tension shaft is magnetized, it is easy to bring the screw member into contact with the tip of the tension shaft.

[0036]

Embodiments of the present invention will be described below with reference to the drawings. (1) (Embodiment of Tensile Strength Tester for Applying Rotational Force with Knob) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In addition, in order to avoid redundant and complicated description, the same configuration,
Similar components are denoted by common reference numerals, and description thereof is omitted.

FIG. 1 is a front sectional view showing a tensile strength tester according to a first embodiment of the present invention, in which a rotary force is applied by a knob. As shown in FIG. 1, a tensile strength tester 1 according to the first embodiment includes a handle 2 which is a knob, a rotating shaft 3 which is a hollow drive shaft fixed to the handle 2 with a set screw 14, and An outer cylindrical member 5 for rotatably holding the rotating shaft 3 via a single-row deep groove ball bearing 4 as a radial bearing, and a small screw 16 coaxially with the outer cylindrical member 5 at the lower end of the outer cylindrical member 5. A compression type load converter 6 fixed via a shaft, a seating attachment 7 which is detachably screwed to the lower end of the load converter 6 coaxially with the outer cylinder member 5, and a small screw at the lower end of the rotating shaft 3. A driving plate 8 with a hexagonal hole fixed through the
A tension shaft 9 in which a hexagonal head 9a is fitted into a hexagonal hole 8a of
A thrust needle roller bearing 1 which is a thrust bearing for rotatably holding a tension shaft 9 on a load converter 6 via a pedestal 10.
1, a stopper plug 12 screwed into the center hole 2 a of the handle portion 2, inserted through the center hole 3 a of the rotating shaft 3 and abutting against the hexagonal head 9 a of the tension shaft 9, It has a receptacle connector 15 for extracting a signal, and an electrical unit 25 (see FIG. 2) connected to the electrode of the receptacle connector 15.

The object to be measured by the tensile strength tester 1 is, for example, a welding nut which is a screw member 17 welded to a steel plate 19 in the present embodiment. This DUT 17
Is measured by the tensile strength tester 1.

The seating attachment 7 is formed with a concave portion 7a having an inner diameter D in the axial direction and a hole 7b through which the tension shaft 9 is loosely inserted in communication with the concave portion 7a. The inner diameter D of the concave portion 7a is set to be larger than the maximum outer diameter d of the screw member 17, and when the tensile strength tester 1 measures the pull-out strength of the object to be measured, the seating portion 7c of the seating attachment 7
Is configured to abut on the upper surface of the steel plate 19 at the outer periphery. That is, the seat attachment 7 is
The tensile strength tester 1 is seated on the upper surface of the steel plate 19,
Has a function as a seating portion for supporting In addition, since the seating attachments 7 having various inner diameters are prepared and the seating attachments 7 are detachably provided on the load converter 6, the seating attachments corresponding to the maximum outer diameter of the screw member 17 can be easily provided. 7 can be exchanged. Further, since the seat attachment 7 is screwed to the load converter 6, by rotating the seat attachment 7, the protruding height from the load converter 6 can be arbitrarily adjusted.

A tension shaft having a shaft portion 9b having a screw portion 9c at the tip and a hexagonal head 9a having a larger diameter than the shaft portion 9b provided at the base end of the shaft portion 9b is provided in a hole 7b of the seat attachment 7. 9 is coaxially inserted with the seat attachment 7. The shaft portion 9b of the tension shaft 9 penetrates through the seating attachment 7, and the screw portion 9c at the distal end is screwed to the screw member 17 of the object to be measured, and the hexagonal head 9a at the base end portion of the driving plate 8 with a hexagonal hole. It is fitted in the hexagonal hole 8a. Then, the rotating power transmitted to the driving plate 8 with hexagonal holes is transmitted to the tension shaft 9.

The rotating shaft 3 to which the driving plate 8 with hexagonal holes is fixed is rotatably held via the upper and lower single row deep groove ball bearings 4 as described above, and is mounted on the upper ball bearing 4. Is provided with a seal ring 13 for preventing entry of foreign matter.
The center hole 3a of the rotating shaft 3 is a hexagonal head 9a of the pulling shaft 9.
And the pulling shaft 9a is configured to be freely inserted and removed from the center hole 3a.

The rotating shaft 3 is provided with a set screw 14
When the handle 2 is rotated, the turning power of the handle 2 is transmitted to the rotating shaft 3. Then, the rotating power of the rotating shaft 3 is transmitted to the driving plate 8 with a hexagonal hole, and the rotating power of the driving plate 8 with a hexagonal hole is transmitted to the tension shaft 9. As a result, the tension shaft 9 includes the hexagonal head 9 a of the tension shaft 9, the pedestal 10,
While applying a reaction force to the steel plate 19 via the roller bearing 11, the load converter 6, and the seat attachment 7, a tensile force corresponding to the rotation angle is applied to the welding nut 17.

The tension shaft 9 is prepared in the same manner as the seating attachment 7, in which male screws having various screw diameters are formed in the screw portion 9 c at the tip portion. From the center hole 3 of the rotating shaft 3
Since the tension shaft 9 can be pulled out from a, it is possible to easily replace the tension shaft 9 with the screw diameter of the screw member 17 that matches the screw diameter.

Thrust bearing 1 on the upper surface of the load transducer 6
Since the roller bearing 1 is a roller bearing, it has excellent durability even when a large load is applied. When a large load is not applied, a ball bearing may be used. Also, a tapered roller bearing can be used.

Since the pedestal 10 having a predetermined thickness is disposed between the thrust bearing 11 and the lower surface of the hexagonal head 9a of the tension shaft 9, the diameter of the hexagonal head 9a of the tension shaft 9 is reduced. When the contact area between the hexagonal head 9a and the thrust bearing 11 is small, it is possible to prevent the local load from acting on the thrust bearing 11 when the maximum outer diameter is smaller than the maximum outer diameter. That is, the stress propagates at an angle of 45 degrees by interposing the thick pedestal 10, so that the load uniformly acts on the thrust bearing 11. Therefore, by interposing the thick base 10, the hexagonal head 9 a of the tension shaft 9 is formed.
Can be reduced, and the size and weight can be reduced.

The outer cylindrical member 5 constitutes the body of the tensile strength tester 1 and is formed in a hollow cylindrical shape with an appropriate thickness that can be gripped by one hand by an adult.

A load converter 6 is provided at the lower end of the outer cylindrical member 5.
Has been fixed. The load transducer 6 is screwed and fixed to the outer cylinder member 5 via a small screw 16 at a first flange 6d formed at the lower end in the figure, and is thrust-fastened at a second flange 6a formed at the upper end. It is in contact with the lower surface of the hexagonal head 9a of the tension shaft 9 via the bearing 11 and the base 10. Thereby, it is configured to receive a reaction force of the tensile force generated in the tensile shaft 9 as a compressive force. In addition, the first flange portion 6
A sensing portion 6b as a thin portion elastically deformed by receiving the compressive force is provided integrally with the second flange portion 6d and the second flange portion 6a, and the compressive force is applied to the sensing portion 6b. Four strain gauges 6c as measuring means for measuring the distortion of the sensing part 6b when receiving the signal are mounted at equal intervals around the circumference, and converted into electric signals by a bridge circuit as shown in FIG. 2 to measure the load. . In the present embodiment, the sensitivity is increased by using the sensing portion 6b as a thin portion, and a space for disposing the strain gauge 6c is secured.

The sensing portion 6b includes a first flange portion 6d,
Since the second flange portion 6a and the sensing portion 6b are screwed and fixed to the outer cylinder member 5 as an integral cylindrical body, the first flange portion 6d and the second flange portion 6a are formed as a part of the outer cylinder member 5. It constitutes a thin portion provided between them. The strain gauge 6c is provided on the sensing part 6b of the load converter 6, and measures the tensile force acting on the tensile shaft 9 from the amount of strain (deformation) in the thrust direction.

In this embodiment, since the receptacle connector 15 is arranged near the strain sensor 6c, the wiring in the measuring instrument can be shortened. FIG. 2 is a block diagram of the electrical unit for this measurement. When the sensing section 6b is compressed and elastically deformed, the strain gauge 6c outputs an electric signal proportional to the distortion rate of the sensing section 6b. The output signal of the strain sensor 6c, which is a strain gauge, is intermediate. The signal is input to the electrical unit 25 via a terminal and wiring having a shield structure. The electrical unit 25 is a control unit 1 including a microcomputer, an amplifier 15b, a peak hold circuit 15c, and the like.
5a, an A / D converter 15d and a digital display 15e, amplifying the electric signal output from the strain gauge 6c,
The digital conversion is performed and the peak is held, and the peak value is always displayed on the digital display unit 15e.

Next, the operation of the above embodiment will be described. First, the tensile shaft 9 having a screw diameter suitable for the screw member 17 to be measured is attached to the tensile strength tester 1 in advance. For this attachment, first, the stopper plug 12 is removed from the handle portion 2, then the tension shaft 9 is inserted into the center hole 3a of the rotating shaft 3 from the distal end side, and then the hexagonal head 9a on the base end side is hexagonal. The stopper plate 12 is fitted into the hexagonal hole 8 a of the drive plate 8 with a hole, and then the stopper plug 12 is screwed into the handle 2, and the tip end of the stopper plug 12 is brought into contact with the hexagonal head 9 a of the tension shaft 9. Thereby, the axial movement of the tension shaft 9 can be prevented.

At the time of measurement, the seating portion of the seating attachment 7 of the tensile strength tester 1 is brought into contact with the upper surface of the steel plate 19 of the object to be measured, and then the handle 2 is rotated so that the tip of the tensile shaft 9 is screwed. 17 screw. When the handle 2 is further rotated and the rotation angle of the tension shaft 9 gradually increases from the rotation angle when the seating attachment 7 contacts the steel plate 19,
Due to the screw action between the distal end portion and the screw member 17, a tensile force in the direction of pulling out the screw member 17, which is proportional to the rotation angle, is applied to the screw member 17. At this time, a seating attachment 7 having an inner diameter larger than the maximum outer diameter of the screw member 17 is attached to the load converter 6 in advance, and the tension shaft 9 is coaxial with the seating attachment 7, so that the seating portion of the seating attachment 7 Automatically comes into close contact with the steel plate 19 at the outer periphery of the screw member 17 and supports the reaction force of the tension shaft 9 via the load transducer 6, the thrust bearing 11, the pedestal 10, and the hexagonal head 9a of the tension shaft 9. Then, the reaction force of the pulling force generated in the pulling shaft 9 is transmitted to the second flange portion 6d of the load converter 6 in the reverse order of the above-described members, and is equal to the pulling force of the screw member 17 in the sensing portion 6b. A reverse compression force is applied. At this time, the thrust bearing 11 acts to reduce the rotational load on the handle 2.

The sensible portion 6b of the load transducer 6 is compressed and deformed in the axial direction by the tensile force generated on the tensile shaft 9, and accordingly, the electric signal proportional to the tensile force of the screw member 17 is generated by the strain gauge 6c. Is connected to the electrical unit 25 via the intermediate terminal and the wiring.
(See FIG. 2), the electric signal is amplified by the amplifier 15b of the electrical unit 25, is further converted into a digital value, is displayed on the display unit 15e so as to be directly readable, and the tensile force in the direction of pulling out the screw member 17 is obtained. Can be measured.

When the handle portion 2 is further rotated, the tensile force finally becomes greater than the joining force between the steel plate 19 and the screw member 17, and the screw member 17 starts to come off from the steel plate 19. At this time, the tensile force P becomes the maximum value (extraction force) and can be read by the display unit 15e of the electrical unit 25 having the peak hold function. That is, the pull-out strength of the measured object can be measured immediately at the work site. By forming a lubricating film such as oily or liquid Teflon on the threaded portion 9c at the tip of the tension shaft 9 and the threaded portion of the screw member 17 of the object to be measured, a large pulling force P can be obtained with a small turning force of the handle. This can occur, and the life of the tension shaft 9 used repeatedly can be extended.

As described above, in the present embodiment, the seating portion of the seating attachment 7 is brought into contact with the upper surface of the steel plate 19 around the screw member 17 to support the tensile strength tester 1 and to adjust the tip end of the tensile shaft 9. It is screwed into the screw member 17, and the grip portion 2 is rotated to apply a tensile force P to the screw member 17, and the tension shaft 9
Of the load transducer 6 provided between the hexagonal head 9a and the seating attachment 7 is compressed and deformed in the axial direction, and the maximum tensile force of the screw member 17 by the strain gauge 6c and the electrical component 25, that is, Measure pullout strength.

Further, the seat attachment 7 and the tension shaft 9 can be attached to and detached from the tensile strength tester 1 so as to correspond to the shape and dimensions of the screw member 17 without replacing the handle portion 2. Can be easily carried, and there is no need to cut out the screw member 17 from the steel plate 19, so that the strength of the object to be measured can be easily measured at the work site.

Further, in the present embodiment, since the sensing portion 6b is a thin elastic deformation portion and the amount of the deformation is measured by the strain gauge 6c, a very simple and very small measuring instrument is realized. be able to. Moreover, since the wiring from the load transducer 6 to the electrical component 25 is provided in the outer cylinder member 5 while having a shield structure, it is possible to improve noise resistance and prevent disconnection during work. The reliability can be greatly improved, and the operability of the measuring instrument can be extremely improved.

FIG. 23 is a view showing a modified example of the load converter 6 of the present invention. In the figure, reference numeral 141 denotes a tubular load converter of a tension type. The load converter 141 is a thin portion having a middle portion 142 and a strain for measuring the strain (deformation) of the middle portion 142 in the thrust direction. And a gauge 126. One end of the load converter 141 is connected to a screw 144 via a first flange portion 143 formed integrally with the intermediate portion 142.
The main body 111 is fixed to the upper part of the main body 111. The first flange portion 143 is provided with a step portion 143a formed coaxially with the main body portion 111 so that the first flange portion 143 can be smoothly fitted to the inner periphery 111a of the main body portion 111. Is fixed to the body 111, the load converter 141 is automatically positioned coaxially with the tension shaft 117. The other end of the load converter 141 is provided integrally with the intermediate portion 142 from the second flange portion 145 having a cap shape, and the lower end of the transmission shaft 146 is in contact with the upper surface of the second flange portion 145. The transmission shaft 146 is formed in a hollow cylindrical shape, is coaxially inserted into the load converter 141, and the tension shaft 117 smoothly penetrates the inner periphery. In the present embodiment, the lower end of the transmission shaft 146 is configured to contact the upper surface of the second flange portion 145. However, as shown in FIG. It may be configured to be screwed to the two flange portions 145, and in any case, any configuration may be used as long as the transmission shaft 146 is provided so as to be coaxial with the load converter 141. On the other hand, a flange portion 146 a is formed at the upper end of the transmission shaft 146, and a cylindrical portion of the transmission shaft 146 is provided so that a gap of a predetermined dimension is provided between the flange portion 146 a and the first flange portion 143 of the load converter 141. The height of 146b is set to be greater than the inner depth of the load converter 141. Furthermore, a detent pin or the like is implanted in the first flange portion 143,
The pin can be engaged with the flange 146 a of the transmission shaft 146 to prevent the pin from rotating with the tension shaft 117. Reference numeral 147 denotes a thrust bearing interposed between the flange portion 146a of the transmission shaft 146 and the handle 118.
The thrust bearing 46 and the thrust bearing 147 are positioned and fixed to the main body 111 so that the thrust bearing 147 can rotate smoothly without falling off from the main body 111 by a not-shown retaining ring or the like. That is, the first flange portion 143, the intermediate portion 142, and the second flange portion 145 of the load converter 141 are integrally fixed to the main body portion 111, and the intermediate portion 142 is a thin portion as a part of the main body portion 111. (Thin portion of the outer cylinder member).

According to such a configuration, the seating surface 113b of the seating attachment 113 is
When the handle 118 is rotated around the screw member 116 and the handle 118 is rotated, the tension shaft 117 is rotated and the tip 117a is screwed into the screw member 116. A tensile force P in the direction of pulling out from the base material 115 is applied. The reaction force of the pulling force P generated on the pulling shaft 117 is transmitted to the second flange portion 145 of the load converter 141 via the pulling shaft 117, the thrust bearing 147, and the transmission shaft 146, and the first flange portion 143 is connected to the main body 1
11, the screw member 1 is attached to the intermediate portion 142.
A tensile force equal to 16 tensile forces P acts. Therefore, when the tension shaft 117 is rotated and a tensile force P corresponding to the rotation angle θ is applied to the screw member 116, the intermediate portion 142 of the load converter 141 is deformed in the axial direction by receiving a tensile force equal to the tensile force P. I do. The plurality of strain gauges 126 attached to the outer periphery of the intermediate portion 142 are deformed by receiving a tensile force, and output an electric signal proportional to the tensile force P to the electrical component section 130.
Other configurations and operations are the same as those of the above-described embodiment, and a similar effect can be obtained in this embodiment.

Further, in the tensile strength tester 1 shown in FIG. 1, the stopper plug 12 is inserted into the hollow portion 3a of the rotating shaft 3 and is screwed to the handle portion 2 so that the pulling shaft 9 comes off upward. I'm preventing. In addition, a seating attachment 7 having an inner diameter larger than the maximum outer diameter of the member to be measured (for example, a welding nut) is screwed into the remaining end of the load converter 6 that supports the tensile peeling force via the thrust bearing 11. . For this reason, the screw member 17
The seating attachment 7 can be easily replaced according to the nominal diameter of the nut. The rotating shaft 3 is supported by a single-row deep groove ball bearing 4 coaxially with the outer cylindrical member 5 so as not to move freely in the axial direction.

In the tensile strength tester according to the first embodiment, a metal base material such as an iron plate or a plastic base material such as an ABS is welded, caulked, press-fitted, or integrally molded and screwed to a nut or bolt. A screw portion 9c is provided at the distal end to apply a pulling force (axial force) based on the principle of a female screw to the nut and the bolt.
A tension shaft 9 having a hexagonal head 9a that receives a reaction force of a tension force (axial force) via a thrust bearing 11 is rotatably provided at a rotation center of the rotation force, and receives a rotation force of the tension shaft 9. The tension shaft 9 is fitted to the load portion to apply a rotational force to the tension shaft 9.
Since the hollow rotary shaft 3 having an inner diameter larger than the maximum outer diameter of the hexagonal head 9a is rotatably provided coaxially with the tension shaft 9, the tension shaft 9 is not loosened and the nominal diameter of the object to be measured. Changes,
The attachment and detachment of the tension shaft due to wear, breakage, and the like of the tension shaft 9 can be quickly performed.

FIG. 3 is a perspective view of the tensile strength tester according to the second embodiment, taken along a plane including an axis. This second
The tensile strength tester 21 of the second embodiment differs from the tensile strength tester 1 of the first embodiment in that the position of the receptacle connector 15 is provided near the handle. When the position of the receptacle connector 15 is provided near the handle as described above, even if the screw member 17 is arranged in a narrow space such as the depth of a hole,
At the time of insertion, the receptacle connector 15 does not become an obstacle, so that measurement can be made up to a portion having a diameter close to the diameter of the outer cylinder member 5.

In the tensile strength tester 1 shown in FIG. 1, a hexagonal hole driving plate 8 having a hexagonal hole 8 a at the center thereof for fitting with a hexagonal head 9 a of a tensioning shaft 9 is fixed to the tip of the rotating shaft 3 with a screw 16. However, in this case, a bottom may be integrally formed at the tip of the rotating shaft 3 and a driving hole (a hexagonal hole in this case) may be provided at the center of the bottom.
The drive hole is not limited to a hexagon, and may have any shape as long as a rotational force can be given.

FIGS. 4A and 4B are views showing a tensile strength tester according to the third embodiment, wherein FIG. 4A is a perspective view cut along a plane including a shaft, FIG. 4B is an enlarged perspective view of a main part, and FIG. FIG. 9 is a perspective view of a modification. FIG. 5 is a diagram showing a fourth embodiment,
(A) is a perspective view cut along a plane including a shaft, and (B) is an enlarged perspective view of a tension shaft.

For example, as shown in FIG.
Is a hexagon socket head cap screw having a hexagonal hole 39d at the head 39a and a screw portion 39c at the tip of the shaft portion.
A hexagonal rod 38 having a convex portion 38a that fits into the hexagonal hole 39d of the hexagonal bolt 39 at the tip of the bolt 39 may be provided on the center of rotation. In this case, the shape of the hole is not limited to the hexagon as described above. For example, as shown in FIG. 4C, a groove 49d of the head 49a and a rotating shaft 3 that engages with the groove 49d.
It may be a combination with a protrusion (not shown) on the third side. Also,
As shown in FIG. 5, the head 49a of the tension shaft 49 is defined as a notch circle, and the recess fitted into the notch circle is formed as a driving plate 48.
May be provided. As these effects, there is no looseness of the tension shaft 49 and the replacement is easy, and a rotational force can be easily applied to the tension shaft 49.

FIG. 6 is a perspective view of a tensile strength tester according to a fifth embodiment cut along a plane including an axis. This fifth
In the tensile strength tester 51 of the embodiment, instead of gripping the outer cylinder member 5, a grip portion 51a is provided on the outer cylinder member 5 so as to protrude in the radial direction. At the end of the receptacle connector 1
Since the number 5 is provided, the operation is easier and a larger load can be applied as compared with the tensile strength tester of the embodiment of FIGS.

7 to 9 are views showing a tensile strength tester according to a sixth embodiment. FIG. 7 is a front sectional view, and FIG. 8 is a sectional view taken along a plane including an axis with a ratchet handle removed. FIG. 9 is a perspective view cut along a plane including a shaft with a ratchet handle mounted.

In the tensile strength tester 61 of the sixth embodiment, as in the knob type tensile strength tester of FIG.
A strain gauge 6c is attached to a member that supports the tension via the thrust bearing 4 to detect a compression force as a reaction force of the tension force and output the voltage as a voltage. May be detected and output.

In the case of the tensile strength tester of the sixth embodiment,
Similar to the tensile strength tester of FIG. 1, the tip of the hollow rotary shaft 63 for providing a rotational driving force is formed as a hexagonal hole so as to be fitted to the hexagonal head 9a of the tensile shaft 9 to provide the rotational force. The head of the tension shaft 9 has a hexagonal head. The hollow portion of the rotating shaft 63 has a size through which the tension shaft 9 can freely pass.

In the tensile strength tester of FIG. 7, similarly to the tensile strength tester of FIG. 1, a driving plate 8 provided with a hexagonal hole at the center thereof to be fitted with a hexagonal head 9a of a tensioning shaft 9 is used for the rotation shaft 9. Although the screw is fixed to the tip, the bottom may be integrally formed at the tip of the rotating shaft 63 and a driving hole (in this case, a hexagonal hole) may be provided at the center of the bottom. The drive hole is not limited to a hexagon, and may have any shape as long as a rotational force can be given. For example, if the tension shaft 9 is a hexagon socket head bolt, a hexagonal rod that fits into the hexagon socket of the hexagon socket head bolt may be provided at the tip of the rotating shaft 63 on the center of rotation. In this case, the shape of the hole is not limited to the hexagon as described above. As these effects, there is no loosening of the tension shaft, the replacement is easy, and a rotating force can be easily applied to the tension shaft.

In the tensile strength tester shown in FIG. 7, similarly to the tensile strength tester shown in FIG. 1, the stopper plug 12 is screwed into the hollow portion of the rotating shaft 63 to prevent the pulling shaft 9 from falling off. In. In addition, the remaining end of the member 6 that supports the tensile peel force via the thrust bearing 11 has a member to be measured (for example,
A seating attachment 7 having a sleeve having an inner diameter larger than the maximum outer diameter of the welding nut) is screwed. For this reason,
The sleeve can be easily changed according to the nominal diameter of the nut.
The rotating shaft 9 is supported by a single row deep groove ball bearing coaxially with the main body so as not to move freely in the axial direction, similarly to the tensile strength tester 1 of FIG.

In the pull-out strength measuring device shown in FIG. 7, the base end of the rotating shaft 63 fitted to the ratchet handle 51a has a hexagonal shape. Good, ratchet handle 5
When a one-way bearing is provided at the rotation center of 1a, it may be a circle fitted with this one-way bearing.

In the case of the tensile strength tester 61 shown in FIG. 7, the main body is supported by the handle 51a so that a large rotational force can be given, and the rotational force is given by the ratchet handle 61a. A tensile peel force can be easily generated.

The present invention can also be used for detecting the pull-out force of a resin insert nut, press caulking nut, or welding nut. As an application field, the present invention can also be used for measuring the removal force of a bearing pressed into a gear or a sprocket. .

A strain gauge is attached to a member that supports the tension shaft via a thrust bearing, and a compression force is detected as a reaction force of the tension force and output as a voltage. As shown in FIG.
The amount of elastic deformation of the head of the tension shaft may be detected and output by a displacement meter or the like. As the displacement meter, for example, an eddy current displacement sensor can be used. The principle of the eddy current displacement sensor is
When a metal such as iron is placed within the high frequency time, electromagnetic induction causes
An eddy current is generated on the surface of the metal in accordance with the magnetic field and the distance, and the eddy current generates a magnetic field in the opposite direction to the magnetic field that generated itself (Lenz's law). As a result, the strength of the magnetic field
It has the effect of reducing. Then, the distance between the metal and the sensor can be known by measuring the extent to which the metal such as iron approaches the sensor (high-frequency generating coil) and the original magnetic field is canceled out and becomes weak.

(2) (Embodiment relating to motor drive) Hereinafter, an embodiment relating to motor drive of the present invention will be described with reference to the drawings. In the following second to fourth embodiments, only portions different from the first embodiment will be described, and the other portions are the same as the first embodiment.

FIG. 11 is a front sectional view showing a tensile strength tester according to an eighth embodiment of the present invention, and FIG. 12 is a side view showing the tensile strength tester. It was configured to be provided by driving means.

As shown in FIGS. 11 and 12, the tensile strength tester 1 according to the eighth embodiment comprises a body 5 of a cover member 5.
a handle part 2 which is a grip part protruding to the side of a, a motor 20 which is driving means housed in the handle part 2,
A drive shaft provided on the motor 20 and having a worm at the tip, a rotation shaft 3 having a worm gear on the outer periphery, and the rotation shaft 3 rotatably via a single row deep groove ball bearing 4 which is a radial bearing. Cover member 5 to be held, and trunk portion 5 of cover member 5
a (compressor) load converter 6 fixed coaxially to the body 5a below the outer cylinder member, and a seating attachment detachably screwed coaxially to the lower end of the load converter 6 coaxially with the load converter. 7, a driving plate 8 having a hexagonal hole fixed to the lower end of the rotating shaft 3 via a small screw 16, and a tension shaft 9 having a hexagonal head 9a fitted in a hexagonal hole 8a of the driving plate 8 having a hexagonal hole. A thrust needle roller bearing 11, which is a thrust bearing for rotatably holding the tension shaft 9 on the load converter 6 via the pedestal 10, and a rotating shaft 3
A stopper plug 12 that is inserted into the center hole 3a of the tension shaft 9 and contacts the hexagonal head 9a of the tension shaft 9, a holding lid that contacts the stopper plug 12, a power supply to the motor 20, and an electric signal from the load converter 6. Receptacle connector 15 for taking out, and electrical unit 25 connected to the electrode of receptacle connector 15
(See FIG. 13).

As shown in FIGS. 20A and 20B,
The handle part 2 has a handle member 118c that can project radially outward by rotating in the direction perpendicular to the axis thereof.
If necessary, the handle member 118c is rotated around the pin 118d, so that a sufficient operating torque can be secured. The handle member 118c of the handle portion 2 may be as shown in FIG. 21, or may be a shaft member or the like housed in the handle portion 2 so as to be able to protrude and retract radially outward.

An on / off switch for driving means is mounted near the body of the cover member. Since the on / off switch is arranged near the body in this manner, the force pressing the switch acts near the center of gravity, so that the tensile strength tester can be prevented from moving due to the force pressing the switch.

The bearings are provided at a predetermined distance from each other in the direction of the rotating shaft, and a worm gear of driving force transmitting means is arranged between these bearings so as to suppress the generation of a thrust load. The center of gravity of the tensile strength tester is configured to be located between the bearings.

Since the worm gear is arranged between the bearings as described above, it is possible to prevent the shake caused by the coaxial rotation, and to suppress the generation of the thrust load. In addition, it is desirable that the center of gravity of the tester be arranged between the bearings.

In the present embodiment, an object to be measured by the tensile strength tester 1 is, for example, a welding nut which is a screw member 17 welded 18 to a steel plate 19. The tensile strength of the DUT 17 is measured by the tensile strength tester 1.

The seat attachment 7 is formed with a hole 7a which penetrates in the axial direction and into which the tension shaft 9 is loosely inserted.
The inner diameter D of the hole 7a is set larger than the maximum outer diameter d of the screw member 17, and when the tensile strength tester 1 measures the tensile strength of the object to be measured, the seating portion 7c of the seating attachment 7
Are configured to contact the upper surface of the steel plate 19 at the outer periphery of the screw member 17. That is, the seat attachment 7
Has a function as a seating portion for supporting the steel plate 19 by sitting the tensile strength tester 1 on the upper surface of the steel plate 19 at the time of measurement. In addition, since the seating attachments 7 having various inner diameters are prepared and the seating attachments 7 are detachably provided on the load converter 6, the seating attachments corresponding to the maximum outer diameter of the screw member 17 can be easily provided. 7 can be exchanged. Further, since the seat attachment 7 is screwed to the load converter 6, by rotating the seat attachment 7, the protruding height from the load converter 6 can be arbitrarily adjusted.

A tension shaft having a shaft portion 9b having a threaded portion 9c at the tip and a hexagonal head 9a having a larger diameter than the shaft portion 9b provided at the base end of the shaft portion 9b is provided in the hole 7a of the seat attachment 7. 9 is coaxially inserted with the seat attachment 7. The shaft portion 9b of the tension shaft 9 penetrates through the seating attachment 7, and the screw portion 9c at the distal end is screwed to the screw member 17 of the object to be measured, and the hexagonal head 9a at the base end portion of the driving plate 8 with a hexagonal hole. It is fitted in the hexagonal hole 8a. Then, the rotating power transmitted to the driving plate 8 with hexagonal holes is transmitted to the tension shaft 9.

The center hole 3a of the rotating shaft 3 to which the hexagonal holed driving plate 8 is fixed has a diameter larger than the maximum outer diameter of the hexagonal head 9a of the tension shaft 9, and the center shaft 3a extends from the center hole 3a. 9a
Are configured to be freely insertable and removable.

When the drive shaft 14, the worm 14a, and the worm gear 3b are rotated by the drive of the motor 20, the rotating shaft 3 transmits the rotating power. Then, the rotating power of the rotating shaft 3 is transmitted to the driving plate 8 with a hexagonal hole, and the rotating power of the driving plate 8 with a hexagonal hole is transmitted to the tension shaft 9. Thus, the tension shaft 9 applies a reaction force to the steel plate 19 via the hexagonal head 9 a of the tension shaft 9, the pedestal 10, the roller bearing 11, the load converter 6, and the seating attachment 7, and the tension according to the rotation angle. A force is applied to the welding nut 17.

As described above, since the worm gear device is used as the driving force transmitting means, a load of several ton class can be applied to the member to be measured, and the size of the motor 20 can be reduced.

As the pulling shaft 9, similarly to the seat attachment 7, one in which male screws having various screw diameters are formed in the screw portion 9 c at the tip portion is prepared, and the stopper plug 12 is connected to the knob 13 a. Since the pulling shaft 9 can be pulled out from the center hole 3a of the rotating shaft 3 by removing it, it is possible to easily replace the pulling shaft 9 with the screw diameter matching the screw diameter of the screw member 17.

The thrust bearing 1 on the upper surface of the load converter 6
Since the roller bearing 1 is a roller bearing, it has excellent durability even when a large load is applied. When a large load is not applied, a ball bearing may be used. Also, a tapered roller bearing can be used.

By disposing a thick base 10 having a predetermined thickness between the thrust bearing 11 and the lower surface of the hexagonal head 9a of the tension shaft 9, the diameter of the hexagonal head 9a of the tension shaft 9 is reduced. When the contact area between the hexagonal head 9a and the thrust bearing 11 is small, it is possible to prevent the local load from acting on the thrust bearing 11 when the maximum outer diameter is smaller than the maximum outer diameter. That is, the stress propagates at an angle of 45 degrees by interposing the thick pedestal 10, so that the load uniformly acts on the thrust bearing 11. Therefore, by interposing the thick base 10, the hexagonal head 9 a of the tension shaft 9 is formed.
Can be reduced, and the size and weight can be reduced.

The cover member 5 comprises a body part of the tensile strength tester 1 and a handle part protruding to the side of the body part.

The load converter 6 is fixed to the cover member 5 by a first flange 6d formed at the lower end in the figure, and connects the thrust bearing 11 and the pedestal 10 by a second flange 6a formed at the upper end. It is in contact with the lower surface of the hexagonal head 9a of the tension shaft 9 through the intermediary. Thereby, it is configured to receive a reaction force of the tensile force generated in the tensile shaft 9 as a compressive force. Further, between the first flange portion 6d and the second flange portion 6a, a sensing portion 6b as a thin portion elastically deformed by receiving the compressive force is provided integrally therewith.
A strain gauge 6c as a measuring means for measuring the strain of the sensing portion 6b when receiving the compressive force, at equal intervals around the circumference,
For example, it is mounted at four places and converted into an electric signal by a bridge circuit to measure the load. In the present embodiment, the sensitivity is increased by using the sensing portion 6b as a thin portion and the strain gauge 6c is formed.
Space is secured.

The sensing portion 6b includes a first flange portion 6d,
Since the second flange portion 6a and the sensing portion 6b are fixed to the lower end portion of the cover member 5 as an integral tubular body, the first flange portion 6d and the second flange portion 6a are formed as a part of the cover member 5. It constitutes a thin portion provided between them. The strain gauge 6c is provided on the sensing portion 6b of the load converter 6 and has a tension shaft 9 based on the amount of strain (deformation) in the thrust direction.
Is measured.

FIG. 13 is a block diagram of the electrical unit for this measurement. The electrical unit 25 includes an amplifier 25a
, An A / D converter 25b, a control means 26, a display means 20, and a switch means 21.

As shown in FIG. 14, the control means 26 includes a storage means 26a, a comparing means 26b, a counting means 26c, a reverse rotation time determining means 26d, a control signal generating means 26e, and a mode switching means 26f. And can be configured using a microcomputer. The storage unit 26a can store one or both of the set value of the tensile force and the measured value of the tensile force.

The comparing means 26b can compare the measured value measured by the measuring means 6c with the set value stored in the storing means 26a. Also, the comparison means 26b
Compares the measured value stored in the storage means 26a with the measured value subsequently measured by the measuring means 6c.

The counting means 26c includes a switch 21
The rotation time based on the number of rotations from turning on of the motor 20 to stopping the motor 20 can be counted. The reverse rotation time determination means 26d can determine the reverse rotation time of the motor 20 from the rotation time based on the number of rotations counted by the counting means 26c.

The control signal generating means 26e can send a measurement start signal to the strain gauge 6c and send a rotation drive signal to the motor 20. The mode switching means 26f is provided in a break value measurement mode (step S
5 to 7), an intensity value measurement mode (modes in steps S8 to S11 described later), and a peak value measurement mode (modes in steps S12 to S17 described later).

FIG. 15 is a flowchart showing the control program. When the program is executed, in step S1, the motor 20 is started and rotates at a low speed until a predetermined time in step S2 elapses, and after the predetermined time elapses, the process proceeds to step S3. Step S3
Then, the counting means 26c is operated, and the process proceeds to step S4. In step S4, the rotation speed of the motor 20 is increased to rotate at high speed, and the process proceeds to step S5.

In step S5, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the flow advances to step S6. Step S6
Then, it is determined whether or not a break has occurred based on a sudden change in the electric signal output from the strain gauge 6c. If the break has occurred, the process proceeds to step S7, and if not, the process proceeds to step S8. In step S7, the measured value is displayed on the display unit 25c as a break value, and the process proceeds to step S18. In step S8, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S9. In step S9, the measured value of the tensile force is stored in the storage means, and the process proceeds to step S10.

In step S10, the measured value stored in step S9 is compared with the set value of the tensile force. If the set value is larger, the process proceeds to step S11, and if not, the process proceeds to step S12. In step S11,
The measured value is displayed as an intensity value on the display means 25c, and the process proceeds to step S18. In step S12, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S13. In step S13, the measured value measured in step S12 is stored in the storage unit, and the process proceeds to step S14. Step S
At 14, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S15.

In step S15, the stored value (measured value) stored in step S13 is compared with the measured value measured in step S14. If the measured value is larger, the process proceeds to step S16; To step S17
Proceed to. In step S16, the measured value of step S12 stored in the storage unit is updated to the measured value of step S14 and stored, and the process returns to step S14 to measure the tensile force again. In step S17, the stored value is displayed on the display unit 25c as a peak value, and the process proceeds to step S18.
In step S18, the motor 20 is temporarily stopped, and the process proceeds to step S19. In step S19, the counting means 26c operated in step S3 is stopped, and in step S20
Proceed to.

At step S20, the counting means 26c
Motor 2 for a time corresponding to the number of revolutions counted by
0 is reversed, and the process proceeds to step S21. Step S21
Then, the motor 20 is stopped.

Next, the operation of the above embodiment will be described. First, the tensile shaft 9 having a screw diameter suitable for the screw member 17 to be measured is attached to the tensile strength tester 1 in advance. At the time of this attachment, first, the holding lid 13 is removed from the knob 2, then the stopper plug 12 is pulled out from the opening of the knob 2, and then the tension shaft 9 is inserted into the center hole 3 a of the rotating shaft 3 from the tip side. Next, the hexagonal head 9a on the base end side is fitted into the hexagonal hole 8a of the driving plate 8 with a hexagonal hole, and then the stopper plug 12 is
a, and the tip of the stopper plug 12 is brought into contact with the hexagonal head 9 a of the tension shaft 9. Thereby, the axial movement of the tension shaft 9 can be prevented.

At the time of measurement, the seating portion of the seating attachment 7 of the tensile strength tester 1 is brought into contact with the upper surface of the steel plate 19 of the object to be measured, and then the motor 20 is rotated at a low speed to rotate the worm 14a to the worm gear 3b. Is transmitted to the pulling shaft via the rotating shaft 3 and the driving plate 8 with a hexagonal hole, whereby the tip of the pulling shaft 9 is screwed to the screw member 17. When the motor 20 is further rotated at a higher speed and the rotation angle of the tension shaft 9 gradually increases from the rotation angle when the seating attachment 7 comes into contact with the steel plate 19, the rotation angle is increased by the screw action between the distal end portion and the screw member 17. Is applied to the screw member 17 in the direction in which the screw member 17 is pulled out. At this time, a seating attachment 7 having an inner diameter larger than the maximum outer diameter of the screw member 17 is attached to the load converter 6 in advance, and the tension shaft 9 is coaxial with the seating attachment 7, so that the seating portion of the seating attachment 7 Automatically adheres to the steel plate 19 around the outside of the screw member 17,
Load transducer 6, thrust bearing 11, pedestal 10, tension shaft 9
The reaction force of the tension shaft 9 is supported through the hexagonal head 9a. Then, the reaction force of the pulling force generated in the pulling shaft 9 is transmitted to the second flange portion 6d of the load converter 6 in the reverse order of the above-described members, and is equal to the pulling force of the screw member 17 in the sensing portion 6b. A reverse compression force is applied. At this time, the thrust bearing 11 functions to reduce the rotational load of the motor 20.

The sensible portion 6b of the load transducer 6 is compressed and deformed in the axial direction by the tensile force generated on the tensile shaft 9, and the electric signal proportional to the tensile force of the screw member 17 is generated by the strain gauge 6c. Is output to the electrical unit 25 (see FIG. 13) via the receptacle connector 15, and the electrical signal is amplified by the amplifier 15b of the electrical unit 25, converted into a digital value, and displayed on the display unit 15e so as to be directly readable. The tensile force in the direction in which the screw member 17 is pulled out can be measured.

As described above, in the present embodiment, the seating portion of the seating attachment 7 is brought into contact with the upper surface of the steel plate 19 around the screw member 17 to support the tensile strength tester 1 and to fix the distal end of the tensile shaft 9. Screwed to the screw member 17, the motor 20 is rotated to apply a tensile force P to the screw member 17, and the load sensor 6 provided between the hexagonal head 9 a of the tension shaft 9 and the seating attachment 7 receives the force. The portion 6b is compressed and deformed in the axial direction, and the screw member 17 is
The maximum tensile force, tensile strength, etc. are measured.

Further, the seat attachment 7 and the tension shaft 9 can be attached to and detached from the tensile strength tester 1 so as to correspond to the shape and dimensions of the screw member 17, and the tensile strength tester 1 is reduced in size and can be freely carried. Since it is not necessary to cut out the screw member 17 from the steel plate 19, it is possible to easily measure the pull-out strength of the workpiece at the work site.

Further, in this embodiment, since the sensing portion 6b is a thin elastic deformation portion and the amount of the deformation is measured by the strain gauge 6c, a very simple and very small test device is realized. be able to. Moreover, since the wiring from the load transducer 6 to the electrical unit 25 is provided in the cover member 5 while having a shield structure, it is possible to improve noise resistance and prevent disconnection during work, and to improve the reliability of the measurement result. In addition to greatly improving the operability, the operability of the tester can be extremely improved.

In the tensile strength tester 1 shown in FIG. 11, the stopper 12 is inserted into the hollow portion 3a of the rotating shaft 3 to prevent the pulling shaft 9 from coming off in the upward direction. In addition, a seating attachment 7 having an inner diameter larger than the maximum outer diameter of the member to be measured (for example, a welding nut) is screwed into the remaining end of the load converter 6 that supports the tensile peeling force via the thrust bearing 11. . For this reason, the seating attachment 7 can be easily replaced according to the nominal diameter of the nut which is the screw member 17.

In the tensile strength tester of the above-described embodiment, a screw is screwed into a nut or bolt connected to a metal base such as an iron plate or a plastic base such as ABS by welding, caulking, press-fitting, or integral molding. A screw portion 9c for applying a tensile force (axial force) to the nut or bolt according to the principle of the above is provided at the distal end portion, and a rotational drive force is received at a proximal end portion, and a reaction force of the tensile force (axial force) is transmitted to a thrust bearing. A tension shaft 9 having a hexagonal head 9a received via the rotary shaft 11 is rotatably provided at the center of rotation of the rotational force, and is fitted to a rotational force receiving portion of the tensile shaft 9 to apply a rotational force to the tensile shaft 9. Since the hollow rotating shaft 3 having an inner diameter larger than the maximum outer diameter of the hexagonal head 9a of the pulling shaft 9 is rotatably provided coaxially with the pulling shaft 9, the pulling shaft 9 is not loosened. Changes in the nominal diameter of the measured object, wear or breakage of the tension shaft 9 Detachment exchange of drawing axis by, can be performed quickly.

The steel plate 19 with the screw member 17 attached thereto
In a tensile strength tester for applying a tensile force in the direction of pulling out the screw member 17 from the steel plate and measuring the tensile strength from the tensile force, a body portion 5a which is a hollow outer cylindrical portion for fixing the seating portion 7c in contact with the steel plate. A hexagonal head 9a via a hollow rotary shaft 3 rotatably held by the trunk 5a and a driving plate 8 with hexagonal holes as connecting means so that rotational power is transmitted from the rotary shaft 3. Are connected to the screw member 17 at the tip end of the shaft portion 9b having a smaller diameter than the hexagonal head 9a, and the tension shaft 9 for applying a tensile force to the screw member 17 in accordance with the rotation angle, and the tension shaft 9 A strain gauge 6c, which is a measuring means for measuring the generated tensile force; a grip 2, which protrudes from a side surface of the body 5a; a motor 20, which is a driving means disposed in the grip 2, a motor 20; Driving force transmitting means (worm 14a, worm Is provided with the car 3b) and, while ensuring the exchange of drawing axis 9 from above, since the tensile strength tester 1 by held horizontally can stand vertically,
The automatic drive by the motor 20 can be stabilized.

Since the driving force transmitting means is a worm gear device including the worm 14a on the motor 20 side and the worm gear 3b on the rotating shaft 3 meshing with the worm 14a, even a small motor 20 can be easily enlarged. It is possible to gain torque, and the degree of freedom of arrangement of the motor 20 increases,
The motor 20 can be housed inside the handle 2 of the tensile strength tester 1.

As shown in FIG. 16A, since the drive shaft 14 of the motor 20 is offset from the rotation center of the rotation shaft 3, the handle 2 is also necessarily offset, and in particular, the handle 2 When viewed from a direction parallel to 2,
The visibility of the positioning / setting of the tension shaft 9 with respect to the screw member 17 which is the portion to be measured can be improved.

The motor 20, the worm 14a, the worm gear 3b, and the handle 2 are provided on a horizontal axis passing through the center of gravity G of the tensile strength tester 1.
With the driving of the motor 20 and the rotation by the tension shaft 9, a stable holding property can be secured. In addition, stabilization of the center of gravity position G can be achieved.

The rotating shaft 3 is supported by a plurality of bearings 4 spaced apart in the axial direction. Since the worm 14a and the worm gear 3b are disposed between the adjacent bearings 4, a thrust load is generated. Can be suppressed.

Further, as shown in FIGS. 17A and 17B, the driving force transmitting means is bevel gears 34a and 23b, so that the motor 20 and the handle 2 can be moved horizontally through the center of gravity with a simple configuration. It can be located on the axis.

Also, the on / off switch 2 of the motor 20
1 is provided in the vicinity of the body 5a of the handle 2, even if the center of gravity is shifted from the center of rotation due to the offset, a force pressing the switch 21 is applied to a position close to the center of gravity G, and the pull by the action of the force is applied. The influence on the strength tester main body can be suppressed.

As shown in FIG. 17 (C), the drive shaft 14 is connected to the worm 14a via the universal joint U, and the handle 2 is disposed on a horizontal line passing through the rotation center of the rotation shaft 3. Since the handle 2 is provided on a horizontal line passing through the center of rotation, the displacement of the center of gravity G can be suppressed, and the displacement of the tensile strength tester main body due to this can be prevented.

As shown in FIG. 16 (B), since the second handle portion 2B is provided at a position different from the handle portion 2 on the outer cylindrical portion 5a, the center of gravity G fluctuates due to the offset. In this case, the holdability can be improved in order to suppress the displacement of the tensile strength tester main body due to the fluctuation.
Further, as shown in FIG. 16A, by disposing the switch 21 so as to be substantially opposed to the handle portion 2 with the rotation axis K interposed therebetween, the main body does not displace due to the pressing force of the switch 21.

The second handle 2B has a point-symmetrical shape with respect to the handle 2 containing the motor 20, so that the center of gravity G can be prevented from changing due to the offset.

In the tensile strength tester 1 shown in FIG. 11, a driving plate 8 having a hexagonal hole 8a provided at the center thereof with a hexagonal hole 8a to be fitted with a hexagonal head 9a of a tensioning shaft 9 is fixed to the tip of the rotating shaft 3 with a screw 16. However, in this case, a bottom may be integrally formed at the tip of the rotating shaft 3 and a driving hole (a hexagonal hole in this case) may be provided at the center of the bottom. The drive hole is not limited to a hexagon, and may have any shape as long as a rotational force can be given.

Since the driving by the motor can be applied to other embodiments described below, this embodiment will be described in detail.

(3) (Other Embodiments Regarding Motor Driving) Hereinafter, a specific description will be given based on examples of the present invention. 38 and 19 to 21 show the first embodiment of the present invention. First, the configuration will be described. 38 and 19, 1
11 is the body part (outer cylinder member) of the pull-out strength measuring device 112
The main body 111 is formed in a hollow cylindrical shape with an appropriate thickness that an adult can hold with one hand, and a substantially hollow cylindrical seating attachment 1 of the pull-out strength measuring device 12 is provided at the lower end in the figure.
13 are provided. Reference numeral 114 denotes an object to be measured including a synthetic resin plate-like base material 115 formed by, for example, injection molding, and a screw member 116 inserted into the boss 115 a of the base material 115. Is measured by the pull-out strength measuring device 112. In this embodiment, the screw member 116 is an embedded nut.

The seat attachment 113 is provided on the main body 11.
1 is detachably screwed to the lower end portion, and a through hole 113a having an inner diameter D is formed in the axial direction. The inner diameter D of the through hole 113a is set to be larger than the maximum outer diameter d of the screw member 116, and when the pull-out strength measuring device 112 measures the pull-out strength of the DUT 114, the seating surface 113b of the seat attachment 113 is connected to the screw member 116. Is configured to abut the upper end surface of the boss portion 115a around the outside. That is, at the time of measurement, the seat attachment 113 has the function of the pull-out strength measuring device 112 seated on the base material 115 and as a seating portion for supporting the base material 115. In addition, since the seating attachments 113 having various sizes of inner diameters are prepared and the seating attachments 113 are detachably provided on the main body 111, the seating attachments corresponding to the maximum outer diameter d of the screw member 116 are easily provided. The attachment 113 can be replaced. In addition, the seat attachment 113
Is screwed to the main body 111, and by rotating the seat attachment 113, the height of the protrusion from the main body 111 can be arbitrarily adjusted.

Through hole 113a of seat attachment 113
A tension shaft 117 (tensile member) is seated on the attachment 1.
13, the tension shaft 117 penetrates through the seat attachment 113, the distal end 117 a is screwed into the screw member 116 of the DUT 114, and the proximal end 117 b is located on the upper part of the main body 111. It is screwed to a handle 118 provided. That is, when the pulling shaft 117 is rotated by the handle 118, the pulling force P according to the turning angle is applied while applying a reaction force to the base material 115 via the body trunk 111 and the screw member 1 is rotated.
16, the main body 111 is rotatably housed in the main body 111. Then, the seat attachment 113
In the same manner as described above, a tension shaft 117 having male threads of various sizes formed at the tip 117a is prepared, and the tension shaft 117 is removably housed in the main body 111 so that it can be easily mounted. It is possible to replace the tension shaft 117 with the screw diameter of the screw member 116. The boss 118 a of the handle 118 to be inserted into the body 111 is provided with:
After the base end 117b of the pulling shaft 117 is screwed, a set screw 119 for fixing the pulling shaft 117 to the boss portion 118a is attached. When the pulling shaft 117 is replaced, the set screw 119 is loosened to remove the handle 118. From pulling shaft 117
Can be easily removed. Also, the handle 118
A groove 118b is formed all around the outer periphery of the boss portion 118a, and a screw 120 screwed on the upper portion of the main body 111 protrudes from the inner peripheral surface 111a of the main body 111 to form the groove 118a. Engage to prevent falling off. As shown in FIG. 39, the motor 20 may be directly built in and fixed to the outer cylinder member 111, and the motor shaft 151 may be directly attached to the tension shaft 117 to rotate the tension shaft 117.

Reference numeral 121 denotes a compression type load converter. The load converter 121 is screwed and fixed to the main body 111 by a first flange portion 122 (first flange portion) formed at the lower end in the figure. , A second flange portion 123 formed on the upper end portion
(The second flange portion) abuts the boss portion 118a via the thrust bearing 125. The second flange portion 123 is configured to be attached to the tension shaft 117 via the thrust bearing 125 and the boss portion 118a so as to receive a reaction force of the tension force P generated on the tension shaft 117 as a compression force. Further, the compressive force (that is, the reaction force of the tensile force P) is applied between the first flange portion 122 and the second flange portion 123.
A sensing part 124 as a thin part which elastically deforms in response to the pressure is provided integrally therewith, and the sensing part 124 serves as a measuring means for measuring the strain of the sensing part 124 which has received the compressive force. A strain gauge 126 is mounted. Sensing part 124
The first flange 122 is formed as a part of the main body 111 by screwing and fixing the first flange 122, the second flange 123, and the sensing part 124 to the main body 111 as an integral cylindrical body. A thin portion provided between the second flange portion 123 and the second flange portion 123 is formed. Also, the strain gauge 126
Measures the tensile force P acting on the tensile shaft 117 from the amount of distortion (deformation) in the thrust direction provided on the sensing portion 124 of the body 111 of the main body. Specifically, when the sensing unit 124 is compressed and elastically changes, the strain gauge 126 outputs an electric signal proportional to the distortion rate of the sensing unit 124. The output signal of the strain gauge 126 is Intermediate terminal 112
7. The signal is input to the electrical unit 130 via the wirings 128 and 129 having the shield structure. The electrical component unit 130 has a control circuit including a microcomputer and an amplifier (not shown) in addition to a display unit 131, an operation switch group 132, a zero reset switch 133, and a battery 134, and outputs an electric signal output from the strain gauge 126. The signal is amplified, digitally converted, peak-held, and the peak value is always displayed on the display unit 131. Furthermore, the electrical component 1
Numeral 30 compares the standard value of the pull-out strength stored in the memory of the microcomputer (set in advance by the operation switch group 132) with the display value of the display unit 131, and displays a failure when the pull-out force deviates from the standard value. Turn on a lamp (not shown). It should be noted that a sound may be emitted instead of turning on the defective display lamp (pass / fail determination signal).

Next, the operation will be described. First, a tensile shaft 117 having a screw diameter suitable for the screw member 116 to be measured is attached to the pull-out strength measuring device 112 in advance. Then, at the time of measurement, the seating surface 113b of the seating attachment 113 of the pull-out strength measuring device 112 is brought into contact with the upper end of the boss 115a with the base material 115 of the measured object 114, and then the handle 118 is rotated to rotate the tip of the pulling shaft 117. The portion 117a is screwed into the screw member 116. When the boss portion 118a is further rotated and the rotation angle θ of the tension shaft 117 gradually increases from the rotation angle θ ₀ when the seat attachment 113 comes in contact with the base material 115 as shown in FIG.
The rotation angle θ is formed by the screw action between the screw member 7a and the screw member 116.
Is applied to the screw member 116 in the direction in which the screw member 116 is pulled out. At this time, the inner diameter D of the main body 111 is larger than the maximum outer diameter d of the screw member 116 in advance.
Is attached, and the tension shaft 117 is coaxial with the seating attachment 113. Therefore, the seating surface 113b of the seating attachment 113 is attached.
Automatically comes into close contact with the base material 115 around the outer periphery of the screw member 116, and the distal end portion 111 b of the body trunk 111, the load converter 12
1. The reaction force of the tension shaft 117 is supported via the conductive shaft thrust bearing 125 and the handle 118. And the tension shaft 11
7 is transmitted to the second flange portion 123 of the load converter 121 in the reverse order of the members described above,
An opposite compressive force equal to the tensile force P of the screw member 116 is applied to the sensing portion 124. At this time, the thrust bearing 125 acts to reduce the rotational load of the boss 118a.

The sensible portion 124 of the load converter 121 is compressed and deformed in the axial direction by the tensile force generated on the tensile shaft 117, and accordingly, the screw member 11 is moved by the strain gauge 126.
6 is output to the electrical unit via the intermediate terminal 127 and the wirings 128 and 129, and the electrical signal is amplified by the amplifier of the electrical unit 130, further converted into a digital value, and converted into a digital value. Is displayed so that it can be read directly,
The tensile force P in the direction in which the screw member 116 is pulled out can be measured. In addition, by setting the standard value of the tensile force P by operating the operation switch group 132 in advance, it is possible to easily judge a defect from the lighting of the defect display lamp when the pull-out strength is insufficient.

When the boss 118a is further rotated,
Eventually, the tensile force P becomes larger than the bonding force between the base material 115 and the screw member 116, and the screw member 116 starts to come off from the base material 115. At this time, the tensile force P becomes the maximum value (extraction force) Pmax shown in FIG. 22, and can be read by the display unit 131 of the electrical component unit 130 having the peak hold function. That is, the pull-out strength of the workpiece 114 can be measured immediately at the work site. The tension shaft 11
By forming a lubricating film such as an oily or liquid Teflon on the threaded portion of the tip 117a of FIG. 7 and the threaded portion of the screw member 116 of the DUT 114, a large pulling force P can be generated with a small rotating force of the handle 118. And the life of the tension shaft 117 used repeatedly can be prolonged.

When the current measurement is completed, the main body 111
Reset switch 1 with the thumb of one hand
33, the display value of the display unit 131 is set to zero to prepare for the next measurement, or the operation switch group 132 is turned on / off.
The operation is completed by pressing the FF switch 132a.

As described above, in this embodiment, the seating surface 113b of the seating attachment 113 is brought into contact with the upper end of the boss 115a of the base material 115 around the screw member 116 to support the pull-out strength measuring device 112 and to pull the seating strength. Axis 11
7 is screwed into the screw member, the handle 118 is rotated to apply a tensile force P to the screw member 116, and the body body 1
11 and a load converter 121 provided between the tension shaft 117.
Of the sensing part 124 is compressed and deformed in the axial direction to
The electrical component 130 measures the maximum tensile force Pmax of the screw member 116, that is, the pull-out strength. And
When the pull-out strength is insufficient, the pass / fail judgment can be made immediately based on the lighting of the defective indicator lamp or the dial tone, and the operator can easily perform the pull-out strength test in a short time. Also,
The seat attachment 113 and the pulling shaft 117 can be attached to and detached from the pull-out strength measuring device 112 so that the shape and dimensions of the screw member 116 can be adjusted without changing the handle 118, and the pull-out strength measuring device 112 is reduced in size and carried. Is free, and there is no need to cut out the screw member 116 from the base material 115.
Fourteen pullout strengths can be measured. The time required for this measurement is 1/10 of the conventional case using a tensile tester.
１／1/50.

Further, in this embodiment, the sensing part 124 is used as a thin elastically deformed part and the amount of the deformation is measured by the strain gauge 126.
Therefore, a very small measuring instrument having a simple configuration can be realized. Moreover, the load converter 1
Since the wires 128 and 129 from the component 21 to the electrical component are provided in the main body 111 while having a shield structure, the noise resistance can be improved and the disconnection during the operation can be prevented, and the reliability of the measurement result can be improved. This greatly improves the operability of the measuring instrument as well.

In the first and second embodiments, the screw member 116 is an embedded nut having a female screw. However, as shown in FIG.
51 may be insert-molded.
17 has a female screw 1 corresponding to the male screw member 151
52 are formed. Further, the thrust bearing 12 for transmitting the reaction force from the screw member 116 to the load converters 121 and 141.
Needless to say, other types of bearings that can support the thrust load can be used instead of the bearings 5 and 147.

The following two motor drive control techniques can be used for the motor drive control described below. Next, the drive control of this motor will be described in detail, for example, when applied to the embodiment of FIG.

(4) <Embodiment related to motor drive control> (5) (Embodiment in which motor is started at low speed and controlled so as to measure at constant speed)

As shown in FIGS. 13 to 15, the tensile strength tester 1 is configured such that a tensile force in a direction in which the screw member 17 is pulled out from the steel plate 19 is screwed to the screw member 17. And a strain gauge 6c for measuring the tensile force generated on the tensile shaft 19 in a tensile strength tester for measuring the pull-out strength from the tensile force. From the predetermined time, that is, the time until the tension shaft 9 and the screw member 17 are screwed together, the tension shaft 9 rotates at a lower speed than the rotation speed at the time of measurement,
Since the control means 26 is provided so as to control the rotation speed at the time of measurement after a predetermined time elapses, that is, after screwing, the tension shaft 9 is measured for a predetermined time from the start of driving of the motor 20. By rotating the pulling shaft 9 and the screw member 17 at a lower speed than the rotating speed at the time, the screwing of the tension shaft 9 and the screw member 17 can be facilitated. Furthermore, after the predetermined time has passed and screwed, since it is controlled so as to be the rotation speed at the time of measurement,
Even if a driving means such as the motor 20 is used, the screwing can be surely and stably performed, and the measurement can be speeded up.

[0138] The tensile strength tester 1 is provided on the steel plate 19 to which the screw member 17 is attached.
In a tensile strength tester which applies a pulling force in the direction of pulling out via a motor 20 for driving a pulling shaft 9 screwed to a screw member 17 and measures the pulling strength from the pulling force,
A hollow body 5a for fixing a seating portion 7c abutting on the body 9;
A hollow rotating shaft 3 rotatably held by the body 5a is connected to a hexagonal head 9a via a connecting means so that rotational power is transmitted from the rotating shaft 3. A tension shaft 9 that is screwed to the screw member 17 at the tip end of the small-diameter shaft portion 9b and applies a tensile force to the screw member 17 in accordance with the rotation angle, and a strain gauge that measures the tensile force generated on the tension shaft 9 6c and the motor 20
A predetermined time from the start of the driving of the
And a control means 26 for controlling the tension shaft 9 to rotate at a lower speed than the rotation speed at the time of measurement until a predetermined time elapses, that is, after the screwing, so that the rotation speed at the time of measurement is reached. The rotation axis 3 and the tension axis 9
In the connecting portion with the connecting member, the turning power of the rotating shaft 3 can be transmitted to the pulling shaft 9 while absorbing the reaction force, so that the loosening of the connecting portion can be prevented. Further, by rotating the tension shaft 9 at a lower speed than the rotational speed at the time of measurement for a predetermined time from the start of driving of the motor 20, the tension shaft 9 and the screw member 1 are rotated.
7 is easily screwed, and after a predetermined time elapses,
Since the rotation speed is controlled so as to be the rotation speed at the time of measurement, the screwing can be surely and stably performed by using a driving means such as the motor 20, and the measurement can be speeded up.

Further, the tensile strength tester has a storage means 26a for storing the set value of the tensile force, and a comparing means for comparing the measured value measured by the strain gauge 6c with the set value stored in the storage means 26a. 26b and a control signal generating means 26e for generating a control signal for stopping the motor 20 based on the comparison result of the comparing means 26b.
Therefore, the strength value can be measured based on the set value that guarantees safety, and it is possible to correspond to an object to be measured that is evaluated with the strength at a certain set value. Further, since there is no need to break the workpiece, there is no possibility that the screw member 17 bites into the tension shaft 9.

Before reaching the tensile strength set value stored by the storage means 26a, the tensile strength tester 1
When the peak value / rupture value of the tensile force is measured, the control means 26 for controlling the motor 20 to stop is provided. By stopping the motor 20, unnecessary driving of the motor 20 can be prevented.

Further, since the tensile strength tester 1 is provided with the display means 25c for displaying the measured peak value / break value, the peak value / break value can be displayed. This is a small tensile strength tester that can be easily carried to carry out pull-out force measurement and pull-out strength inspection.

Further, the tensile strength tester 1 has a storage means 26 for storing the measured value measured by the strain gauge 6c.
a, a comparing unit 26b for comparing the measured value stored in the storing unit 26a with a measured value thereafter measured by the strain gauge 6c, and stopping the motor 20 based on the comparison result of the comparing unit 26b. Since the control unit 26 includes the control signal generation unit 26e that generates the control signal, the motor 20 can be stopped based on the comparison result of the comparison unit 26b.

Further, the strength of the measured object can be known only by knowing the intensity peak value, and the tensile strength tester 1 is capable of storing the set value of the tensile force. 26a, storage means 26a for storing the tensile force measurement value measured by the strain gauge 6c, and comparing means 26 for comparing the stored tensile force measurement value with the set tensile force value.
b, when the measured value of the tensile force is larger than the set value of the tensile force, the set value of the tensile force is updated to the measured value of the tensile force, stored as the updated set value of the tensile force, and the tensile force is measured again. If the updated set value of the tensile force is larger, the updated set value of the tensile force is displayed as a peak value on the display unit 2.
5c, a control signal generating means 26e for generating a control signal is provided, so that the peak value can be found if the measured value is lower than the stored value, and the stored value is used as the peak value. , And the peak value can be measured, whereby the intensity of the measured object can be measured.

Further, the tensile strength tester 1 controls the control signal from the control signal generating means 26e so that the control means 26 reversely rotates the motor 20 after displaying the peak value and stops the motor 20 after the reverse rotation. Therefore, it is easy to remove the screw member 17 from the tension shaft 9.

The tensile strength tester 1 has a storage means 26a for storing the set value of the tensile force and a storage means 26a for storing the measured value of the tensile force measured by the strain gauge 6c.
Means 2 for comparing the measured value with the set value
6b, a control means 26 for controlling the control signal generation means 26e to generate a control signal so as to stop the motor 20 based on the comparison result of the comparison means 26b, and a tensile force setting stored by the storage means 26a. If the peak value / break value of the tensile force is measured before reaching the value, the measured peak value / break value is displayed on the display means 25c as the peak value / break value, and the motor 20 is stopped. If the measured force value is larger than the set tensile force value, the set tensile force value is updated to the measured tensile force value and stored in the storage means 26a as the updated set tensile force value, and the tensile force is measured again. If the updated tension setting value is larger, the updated tension setting value is set as a peak value in the display means 2.
5c to control the driving means so as to stop the driving means. Therefore, before reaching the set tensile force value stored by the storage means 26a, the peak value of the tensile force /
When the break value is measured, the measured peak value / break value is displayed on the display means 25c as the peak value / break value and the motor 20 is stopped, so that the peak value / break value is reached before reaching the tensile force set value. Even when the break value is measured, the peak value / break value can be measured. If the measured tensile force value is larger than the set tensile force value, the set tensile force value is updated to the measured tensile force value and updated. The stored tensile force set value is stored in the storage means 26a, and the tensile force is measured again.
When the updated set value of the pulling force is larger, the updated set value of the pulling force is displayed as a peak value on the display means 25c and the motor 20 is stopped, so that the peak value can be known.

The tensile strength tester 1 controls the control means 26 to generate a control signal from the control signal generation means 26e so as to rotate the motor 20 in the reverse direction before stopping the motor 20. It is easy to remove the screw member 17 from.

The tensile strength tester 1 includes a motor 2
0, a switch 21 for turning on / off 0, a counting means 26c for counting a rotation time from when the switch 21 is turned on to a stop of the motor 20, and a reverse rotation time of the motor 20 based on the rotation time counted by the counting means 26c. And a reverse rotation time determining means 26d for determining, after the set value / peak value is measured, the control means 26 reversely rotates the motor 20 based on the reverse rotation time determined by the reverse rotation time determining means 26d, Since the control signal is generated from the control signal generating means 26e so as to stop the motor 20 after the elapse of the reverse rotation time, the motor 20 is controlled based on the forward rotation time of the motor 20 before the motor 20 is stopped.
Can be rotated in the reverse direction, and the screw member 17 can be
It is very easy to remove.

In the tensile strength tester shown in FIGS.
As with the tensile strength tester 1 of FIGS.
0, a motor 20, a drive shaft 14, a worm 14a,
The worm gear 3b, the electrical unit 25, etc. are housed, and FIGS.
By using the same control device as in the fifth embodiment, the above-described effects can be obtained.

In the above description, the start of measurement may be commanded when the motor torque is detected and the torque becomes stable. Alternatively, as shown in FIGS. The measurement may be started in accordance with the operation of the counter after the predetermined time elapses.

With this configuration, it is possible to evaluate the tensile force with high accuracy by measuring the tensile force after the rotation is stabilized.

Further, in FIG. 14, the rotation is performed at a constant speed (first speed) at a constant speed, but this is made slower than the constant speed at the time of measurement so that the tension shaft is easily screwed into the screw member. The constant speed of the predetermined constant speed (second
The speed may be gradually increased until the speed reaches (speed).

(6) (Explanation of Mode) The mode is (A) a setting mode in which a set value is determined and measured, and the set value is used to measure whether or not a screw member (nut, bolt, etc.) is removed from the base material. It comprises three modes: (B) a peak value measurement mode for measuring a peak value, and (C) a break value measurement mode for measuring a break value.

(7) (Description of (A) Setting Mode) As shown in FIG. 15, in step S10, the measured value stored in step S9 is compared with the measured tensile force. Proceeds to step S12. In step S11, the measured value is displayed on the display unit 25c as an intensity value, and the process proceeds to step S18. In step S12,
The tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and step S1 is performed.
Proceed to 3. In step S13, the measured value measured in step S12 is stored in the storage unit, and the process proceeds to step S14. In step S14, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S15.

In step S15, the stored value (measured value) stored in step S13 is compared with the measured value measured in step S14, and if the measured value is not larger, the process proceeds to step S17. In step S17, the stored value is displayed on the display unit 25c as a peak value, and the process proceeds to step S1.
Proceed to 8. In step S18, the motor 20 is temporarily stopped (stopped). By performing such control, it is possible to determine and measure the set value, and to measure whether the screw member (nut, bolt, etc.) is not removed from the base material even with the set value.

Further, after the motor is temporarily stopped in step S18, in step S19, the counting means 26c operated in step S3 is stopped, and the process proceeds to step S20.

In the step S20, the counting means 26c
Motor 2 for a time corresponding to the number of revolutions counted by
0 is reversed, and the process proceeds to step S21. Step S21
Then, the motor 20 is stopped. By controlling in this way and rotating the motor 20 in the reverse direction, the tension shaft can be automatically released from the nut.

The tensile strength tester 1 shown in FIG.
In a tensile strength tester for applying a tensile force in the direction of pulling out the screw member 17 from the steel plate 19 to the steel plate 19 to which the steel plate 7 is attached, and measuring the pull-out strength from the tensile force, a hollow body for fixing the seating portion 7c contacting the steel plate 17 A hexagonal head 9a via a hexagonal hole driving plate 8 so that a rotating power is transmitted from the rotating shaft 3 and a hollow rotating shaft 3 rotatably held by the body 5a. Shaft 9b that is connected and has a smaller diameter than hexagonal head 9a
A tension shaft 9 that is screwed to the screw member 17 at the tip of the shaft to apply a tensile force corresponding to the rotation angle to the screw member 17, a strain gauge 6c for measuring the tensile force generated in the tension shaft 9, and a rotation shaft. 3, a storage unit 26a for storing a set value of the tensile force, a comparison unit 26b for comparing the measured value measured by the strain gauge 6c with the set value, and a comparison unit 26b.
And control means 26 for controlling the motor 20 to stop when the set value is greater than the measured value. With this configuration, if the tensile limit is exceeded, there is a risk that the tester will be broken. Therefore, measurement can be performed within the measurement limit of the tester, and damage to the tester can be prevented.

In the tensile strength tester 1, the driving means is constituted by a motor 20, and the control means 26 controls the motor 20 to reversely rotate before stopping. With such a configuration, it is easy to remove the screw member 17 from the tension shaft 9.

The tensile strength tester 1 is counted by a switch 17 for turning on / off the motor 20, a counting means 26c for counting the rotation time from the turning on of the switch 17 to the stop of the motor 20, and a counting means 26c. Reverse rotation time determining means 26d for determining the reverse rotation time of the motor 20 based on the measured rotation time, and the control means 26 determines the reverse rotation time after the set value / peak value is measured. The motor 20 reversely rotates based on the reverse rotation time, and after the reverse rotation time elapses, the motor 20
Is controlled to stop. With such a configuration, it is extremely easy to remove the screw member 17 from the tension shaft 9.

(Case where the break value is reached before the set value is reached and the motor drive is stopped in an emergency) As shown in FIG. 15, in step S6, a sudden change in the electric signal output from the strain gauge 6c is performed. It is determined whether or not the rupture has occurred based on the above. If the rupture has occurred, the process proceeds to step S7. In step S7, the display unit 25c uses the measured value as a break value.
And the process proceeds to step S18. In step S18, the motor 20 is temporarily stopped (emergency stop), and
Proceed to 19. In step S19, the counting means 26c operated in step S3 is stopped, and the process proceeds to step S20.

In the step S20, the counting means 26c
Motor 2 for a time corresponding to the number of revolutions counted by
0 is reversed, and the process proceeds to step S21. Step S21
Then, the motor 20 is stopped.

The tensile strength tester 1 shown in FIGS.
Before the measured value measured by the strain gauge 19 reaches the tensile force set value stored by the storage means 26a,
When the peak value / rupture value of the tensile force is measured, the control means 26 for controlling the motor 20 to stop is provided. By stopping the motor 20, unnecessary driving of the motor 20 can be prevented.

Since the tensile strength tester 1 is provided with display means for displaying the measured peak value / break value,
The peak value / rupture value can be displayed, and it can be carried to a molding work site or the like, and the removal force can be easily measured, and the pass / fail inspection of the drawing strength can be performed.

(When the peak value is reached before the measured value, the motor drive is reduced to a low speed (third speed))

FIG. 26 is a flowchart showing the control program in FIGS. When the program is executed, in step S1, the motor 20
Is started and the motor rotates at a low speed until a predetermined time in step S2 elapses, and after the predetermined time elapses, the process proceeds to step S3. In step S3, the counting means 26c is operated, and the process proceeds to step S4. In step S4, the motor 2
0 rotation speed and high speed rotation, step S
Go to 5.

In step S5, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the flow advances to step S6. Step S6
Then, it is determined whether or not a break has occurred based on a sudden change in the electric signal output from the strain gauge 6c. If the break has occurred, the process proceeds to step S7, and if not, the process proceeds to step S8. In step S7, the measured value is displayed on the display unit 25c as a break value, and the process proceeds to step S18. In step S8, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S9. In step S9, the measured value of the tensile force is stored in the storage means, and the process proceeds to step S10.

In step S10, the measured value stored in step S9 is compared with the measured tensile force. If the measured value is larger, the process proceeds to step S11, and if not, the process proceeds to step S12. In step S11,
The measured value is displayed as an intensity value on the display means 25c, and the process proceeds to step S18. In step S12, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S13. In step S13, the measured value measured in step S12 is stored in the storage unit, and the process proceeds to step S14. Step S
At 14, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S15.

In step S15, the stored value (measured value) stored in step S13 is compared with the measured value measured in step S14. If the measured value is larger, the process proceeds to step S16. To step S17
Proceed to. In step S16, the measured value of step S12 stored in the storage unit is updated to the measured value of step S14 and stored, and the process returns to step S14 to measure the tensile force again.

In step S17, the stored value is displayed on the display means 25c as a peak value, and the flow advances to step S18.
In step S18, the drive torque of the motor 20 is reduced. As described above, by reducing the driving torque of the motor 20 in step S18, the load on the motor can be reduced when the base material 19 and the screw member 17 break sharply.

In step S19, the motor 20 is temporarily stopped, and the flow advances to step S20. In step S20, the counting unit 26c operated in step S3 is stopped, and the process proceeds to step S21.

At step S21, the counting means 26c
Motor 2 for a time corresponding to the number of revolutions counted by
0 is reversed, and the process proceeds to step S22. Step S22
Then, the motor 20 is stopped.

Note that the third speed may be the same as the second speed. However, in this case, a constant speed is preferable because the measurement is being performed.

(Regarding the display) The sensing part 6b of the load transducer 6 is compressed and deformed in the axial direction by the tensile force generated on the tensile shaft 9 in FIG. 1, and accordingly, the tensile force of the screw member 17 is measured by the strain gauge 6c. Is output to the electrical unit 25 (see FIG. 13) via the receptacle connector 15,
The electric signal is amplified by the amplifier 25a of the electrical unit 25,
Further, it is converted into a digital value and displayed so as to be directly readable by the display means 25c, and the tensile force in the direction in which the screw member 17 is pulled out can be measured.

Since the tensile strength tester 1 is provided with display means for displaying the measured peak value / rupture value,
The peak value / rupture value can be displayed, and it can be carried to a molding work site or the like, and the removal force can be easily measured, and the pass / fail inspection of the drawing strength can be performed.

The tensile strength tester 1 is connected to a steel plate 19 to which the screw member 17 is attached via a motor 20 for driving a tension shaft 9 for screwing the tensile member in the direction of pulling the screw member 17 from the steel plate 19 to the screw member 17. In addition, in the tensile strength tester for measuring the pull-out strength from the tensile force, a strain gauge 19 for measuring the tensile force generated on the tensile shaft 9, storage means 26a for storing a set value of the tensile force, Storage means 26a for storing the measured value measured by the strain gauge 19, comparison means 26b for comparing the measured value measured by the strain gauge 19 with the set value stored in the storage means 26a, and stored in the storage means 26a. Measured value followed by strain gauge 1
Comparing means 26 for comparing with the measured value measured by
b, the set mode for stopping the motor 20 is compared with the measured value stored in the storage means 26a and the subsequently measured value based on the comparison result of comparing the measured value and the set value. The mode switching means 26f for switching between the peak value measurement mode in which the motor 20 is stopped and the peak value measurement mode is provided based on the comparison result, so that the intensity of the measured object can be known only by knowing the intensity peak value. Since the peak value can be determined when the measured value is lower than the stored value, the peak value can be measured by using the stored value as the peak value, whereby the intensity of the measured object can be measured.

Further, the tensile strength tester 1 updates the peak value measurement mode by updating the set tensile force value to the measured tensile force value when the measured tensile force value is larger than the set tensile force value. In addition to storing the tensile force set value, the tensile force is measured again, and if the updated tensile force set value is larger than the measured tensile force value, the updated tensile force set value is displayed as a peak value. Since it is controlled, the peak value can be displayed.

In the peak value measurement mode, when the measured tensile force is larger than the set tensile force, the set tensile force is updated to the measured tensile force and stored as the updated set tensile force. Measure the tensile force again, and if the updated tensile force set value is greater than the measured tensile force value, control is performed so that the updated tensile force set value is displayed as the peak value, so the peak value is displayed can do.

(8) ((B) Peak Value Measurement Mode) As shown in FIG. 14, the control signal generation means 26e sends a measurement start signal to the strain gauge 6c and
A rotation drive signal can be sent to zero. The mode switching means 26f includes a break value measurement mode (steps S5 to S7 described later), an intensity value measurement mode (steps S8 to S11 described later), and a peak value measurement mode (steps S12 to S17 described later). Mode).

As shown in FIG. 15, in step S15, the stored value (measured value) stored in step S13 is compared with the measured value measured in step S14, and if the measured value is larger, step S15 is performed. The process proceeds to S16, and if not, the process proceeds to Step S17. In step S16,
The measured value of step S12 stored in the storage means is updated to the measured value of step S14, and stored.
Returning to 4, the tensile force is measured again. In step S17, the stored value is displayed on the display unit 25c as a peak value,
Proceed to step S18. In step S18, the motor 2
0 is temporarily stopped, and the process proceeds to step S19. Step S1
In step 9, the counting means 26c operated in step S3 is stopped, and the process proceeds to step S20.

The tensile strength tester 1 shown in FIGS. 11 and 12 drives the tension shaft 9 for screwing the screw member 17 into the steel plate 19 to which the screw member 17 is attached, in the direction of pulling out the screw member 17 from the steel plate 19. A strain gauge 6c for measuring a tensile force generated on the tensile shaft 9 and a measured value measured by the strain gauge 6c in a tensile strength tester for measuring a pull-out strength from a tensile force applied through a motor 20 to be applied. A storage unit 26a, a comparison unit 26b for comparing the measurement value stored in the storage unit 26a with a measurement value subsequently measured by the strain gauge 6c, and a pre-data based on the result compared by the comparison unit 26b. The control means 26 for controlling the peak value at which the sample 20 is stopped is provided, so that conventionally, only the break value was supported. Seen alone can know the strength of itself, also, the measurement value from the storage value is lower understand peak value, it can be the stored value and the peak value.

The tensile strength tester 1 has a storage means 26a for storing the set value of the tensile force and a comparing means 26b for comparing the stored measured measured tensile force with the set tensile force.
If the measured value of the tensile force is larger than the set value of the tensile force, the set value of the tensile force is updated to the measured value of the tensile force and stored as the updated set value of the tensile force. When the set tensile force set value is larger, the control means 26 controls the display so that the updated set tensile force value is displayed as a peak value. Alone, the strength of the object can be known.If the measured value is lower than the memorized value, the peak value can be known, and the peak value can be measured by using the memorized value as the peak value. Can be measured.

Further, in the tensile strength tester 1, the driving means is constituted by a motor, and the control means 26 controls the motor to rotate in the reverse direction after the display and to stop the motor after the reverse rotation. It is easy to remove the screw member 17 from the shaft 9.

The tensile strength tester 1 is counted by a switch 21 for turning on / off the motor 20, a counting means 26c for counting the rotation time from the turning on of the switch 21 to the stop of the motor 20, and a counting means 26c. Reverse rotation time determining means 26d for determining the reverse rotation time of the motor 20 based on the measured rotation time, and the control means 26 determines the reverse rotation time after the set value / peak value is measured. The motor 20 reversely rotates based on the reverse rotation time, and after the reverse rotation time elapses, the motor 20
Is stopped so that the motor 20 is rotated in the reverse direction based on the forward rotation time, so that it is extremely easy to remove the screw member 17 from the tension shaft 9.

(Regarding Stop of Driving) As shown in FIG. 14, the counting means 26c can count the rotation time based on the number of rotations from the time when the switch 21 is turned on to the time when the motor 20 is stopped. Reverse rotation time determination means 26d
Can determine the reverse rotation time of the motor 20 from the rotation time based on the number of rotations counted by the counting means 26c.

As shown in FIG. 15, in step S15, the stored value (measured value) stored in step S13 is compared with the measured value measured in step S14, and if the measured value is larger, the process proceeds to step S15. The process proceeds to S16, and if not, the process proceeds to Step S17. In step S16,
The measured value of step S12 stored in the storage means is updated to the measured value of step S14, and stored.
Returning to 4, the tensile force is measured again. In step S17, the stored value is displayed on the display unit 25c as a peak value,
Proceed to step S18. In step S18, the motor 2
0 is temporarily stopped, and the process proceeds to step S19. Step S1
In step 9, the counting means 26c operated in step S3 is stopped, and the process proceeds to step S20.

In the step S20, the counting means 26c
Motor 2 for a time corresponding to the number of revolutions counted by
0 is reversed, and the process proceeds to step S21. Step S21
Then, the motor 20 is stopped.

The tensile strength tester 1 shown in FIGS. 11 and 12 drives the tension shaft 9 for screwing the screw member 17 into the steel plate 19 to which the screw member 17 is attached, in the direction of pulling the screw member 17 from the steel plate 19. A tensile strength tester for measuring the pull-out strength from the tensile force,
Strain gauge 19 for measuring tensile force generated on tensile shaft 19
And storage means 26a for storing the set value of the tensile force; comparison means 26b for comparing the measured value measured by the strain gauge 19 with the set value stored in the storage means 26a; Control means 26 for controlling the motor 20 to stop based on the measured value. Conventionally, only the manual breaking value was measured. Can be handled.

Further, the tensile strength tester 1 has a strain gauge 19
Control means 26 for controlling motor 20 to stop when the peak value / rupture value of the tensile force is measured before the measured value measured by the storage means 26a reaches the tensile force set value stored by storage means 26a. Since data is provided that breaks early and breaks due to poor strength, etc.
Unnecessary driving of the motor 20 can be prevented by stopping the motor 20.

Since the tensile strength tester 1 has display means for displaying the measured peak value / rupture value,
The peak value / rupture value can be displayed, and it can be carried to a molding work site or the like, and the removal force can be easily measured, and the pass / fail inspection of the drawing strength can be performed.

The tensile strength tester 1 is connected to a steel plate 19 to which the screw member 17 is attached via a motor 20 for driving a tensile shaft 9 for screwing the screw member 17 with a pulling force in the direction of pulling the screw member 17 from the steel plate 19. In addition, in the tensile strength tester for measuring the pull-out strength from the tensile force, a strain gauge 19 for measuring the tensile force generated on the tensile shaft 9, storage means 26a for storing a set value of the tensile force, Storage means 26a for storing the measured value measured by the strain gauge 19, comparison means 26b for comparing the measured value measured by the strain gauge 19 with the set value stored in the storage means 26a, and stored in the storage means 26a. Measured value followed by strain gauge 1
Comparing means 26 for comparing with the measured value measured by
b, the set mode for stopping the motor 20 is compared with the measured value stored in the storage means 26a and the subsequently measured value based on the comparison result of comparing the measured value and the set value. The mode switching means 26f for switching between the peak value measurement mode in which the motor 20 is stopped and the peak value measurement mode is provided based on the comparison result, so that the intensity of the measured object can be known only by knowing the intensity peak value. Since the peak value can be determined when the measured value is lower than the stored value, the peak value can be measured by using the stored value as the peak value, whereby the intensity of the measured object can be measured.

Further, the tensile strength tester 1 updates the peak value measurement mode by updating the set tensile force value to the measured tensile force value when the measured tensile force value is larger than the set tensile force value. In addition to storing the tensile force set value, the tensile force is measured again, and if the updated tensile force set value is larger than the measured tensile force value, the updated tensile force set value is displayed as a peak value. Since it is controlled, the peak value can be displayed.

In the tensile strength tester 1, the driving means is constituted by the motor 20, the motor 20 is rotated in the reverse direction after the display, and the motor 20 is stopped after the reverse rotation. Easy to remove.

The tensile strength tester 1 includes a switch 21 for turning on / off the motor 20, a counting unit 26c for counting the rotation time from the turning on of the switch 21 to the stop of the motor 20, and a counting unit 26c. Reverse rotation time determination means 26d for determining the reverse rotation time of the front motor 20 based on the rotation time thus obtained. After the set value / peak value is measured, the control means 26 controls the reverse rotation time determination means 26d. The motor 20 is rotated in reverse based on the determined reverse rotation time, and the motor 20 is controlled to stop after the reverse rotation time has elapsed.
Before the motor is stopped, the motor 20 is controlled to perform reverse rotation and reverse rotation based on the reverse rotation time, so that it is extremely easy to remove the screw member from the tension member.

(Reverse Motor Rotation) FIG. 13 is a block diagram of the electrical unit for this measurement. The electrical unit 25 includes an amplifier 25a, an A / D converter 25b, a control unit 26, a display unit 20, and a switch unit 21.

As shown in FIG. 14, the control means 26 comprises a storage means 26a, a comparing means 26b, a counting means 26c, a reverse rotation time determining means 26d, a control signal generating means 26e, and a mode switching means 26f. And can be configured using a microcomputer. The storage unit 26a can store one or both of the set value of the tensile force and the measured value of the tensile force.

The comparison means 26b can compare the measured value measured by the measurement means 6c with the set value stored in the storage means 26a. Also, the comparison means 26b
Compares the measured value stored in the storage means 26a with the measured value subsequently measured by the measuring means 6c.

The counting means 26c is connected to the switch 21
The rotation time based on the number of rotations from turning on of the motor 20 to stopping the motor 20 can be counted. The reverse rotation time determination means 26d can determine the reverse rotation time of the motor 20 from the rotation time based on the number of rotations counted by the counting means 26c.

As shown in FIG. 15, in step S20, the motor 20 is rotated reversely for a time corresponding to the number of revolutions counted by the counting means 26c.
Proceed to. In step S21, the motor 20 is stopped.

The tensile strength tester 1 shown in FIGS.
The driving means is constituted by the motor 20 and the control means 26
Since the motor 20 is controlled to rotate in the reverse direction before the motor 20 is stopped, it is easy to remove the screw member 17 from the tension shaft 9.

Further, the tensile strength tester 1 is counted by a switch 17 for turning on / off the motor 20, a counting means 26c for counting the rotation time from the turning on of the switch 17 to the stop of the motor 20, and a counting means 26c. Reverse rotation time determining means 26d for determining the reverse rotation time of the motor 20 based on the measured rotation time, and the control means 26 determines the reverse rotation time after the set value / peak value is measured. The motor 20 reversely rotates based on the reverse rotation time, and after the reverse rotation time elapses, the motor 20
Is stopped so that it is extremely easy to remove the screw member 17 from the tension shaft 9.

(9) ((C) Break Value Measurement Mode) This break value measurement mode is basically the same as the measurement contents of the tensile strength tester shown in FIGS. 1 to 10 or FIGS. .

FIG. 27 is a front sectional view showing a tensile strength tester according to a twelfth embodiment of the present invention, and FIG. 12 is a side view showing the same. It was configured to be provided by driving means.

As shown in FIGS. 27 and 12, the tensile strength tester 1A according to the twelfth embodiment comprises a handle portion 2 which is a grip portion protruding to the side of the body 5a of the cover member 5,
The motor 20 which is a driving means housed in the handle portion 2
And a drive shaft provided on the motor 20 and having a worm at the tip, a rotating shaft 3 having a worm gear on the outer periphery, and rotating the rotating shaft 3 via a single-row deep groove ball bearing 4 which is a radial bearing. A cover member 5 that can be freely held, a compression-type load transducer 6 fixed coaxially with the body 5a below the body 5a (outer cylindrical member) of the cover member 5, and a lower end of the load transducer 6 A seating attachment 7 which is detachably screwed coaxially with the load converter, a hexagonal hole driving plate 8 fixed to the lower end of the rotating shaft 3 via small screws 16, and a hexagonal hole of the hexagonal hole driving plate 8 Hole 8
a tension shaft 9 which is a tension member in which a hexagonal head 9a is fitted
And a thrust needle roller bearing 11, which is a thrust bearing for rotatably holding the tension shaft 9 on the load converter 6 via a pedestal 10, and a tension shaft 9 inserted through the center hole 3a of the rotation shaft 3.
A stopper 12 abutting against the hexagonal head 9a, a retainer lid abutting the stopper 12, a receptacle connector 15 for supplying power to the motor 20 and extracting an electric signal from the load converter 6, and a receptacle connector 15. And an electrical unit 25 (see FIG. 13) connected to the electrodes.

The seat attachment 7 is screwed to the lower end of the load converter 6 which is a compressive force sensing part. And
The thread portion 7d of the seat attachment 7 is formed in a reverse thread to the thread portion 9c of the tension shaft 9. Further, the seat attachment 7 is formed with an uneven portion 7h, which is a locking means with which the broken nut 17 comes into contact. Further, the portion including the seating portion 7c, which is the tip of the seating attachment 7, is magnetized to be a magnet.

The tension shaft 9 is formed to have a length whose tip is located above the lower end of the seating attachment 7. That is, the tip of the tension shaft 9 is attached to the seat attachment 7.
At the lower end of the seating portion 7c at the lower end. Further, at least the tip of the tension shaft 9 is magnetized.

An on / off switch 21 of the driving means 20 is mounted near the body 5a of the cover member 5. Since the on / off switch 21 is disposed near the body 5a in this manner, the force pressing the switch 21 acts near the center of gravity G, and therefore, the tensile strength tester 1A is prevented from moving by the force pressing the switch 21. can do.

The bearings 4 are provided at a predetermined distance from each other in the direction of the rotating shaft, and a worm gear 3b of driving force transmitting means is arranged between these bearings 4 so as to suppress the generation of a thrust load. I have. In addition, tensile strength tester 1A
Is configured to be located between the bearings 4.

Since the worm gear 3b is arranged between the bearings 4 as described above, it is possible to prevent the shake caused by the rotation of the rotating shaft 3 and suppress the generation of the thrust load. Further, it is desirable to arrange the center of gravity G of the tensile strength tester 1A between the bearings 4.

The object to be measured by the tensile strength tester 1A is, for example, a weld nut which is a screw member 17 welded 18 to a steel plate 19 in this embodiment. The tensile strength of the DUT 17 is measured by the tensile strength tester 1A.

The seat attachment 7 is formed with a hole 7a that penetrates in the axial direction and into which the tension shaft 9 is loosely inserted.
The inner diameter D of the hole 7a is set to be larger than the maximum outer diameter d of the screw member 17, and when the tensile strength tester 1A measures the tensile strength of the object to be measured, the seating portion 7 of the seating attachment 7
c is configured to abut on the upper surface of the steel plate 19 at the outer periphery of the screw member 17. That is, the seating attachment 7 has a function as a seating portion that supports the steel plate 19 by measuring the tensile strength tester 1A on the upper surface of the steel plate 19 during measurement. In addition, seating attachments 7 having inner diameters of various sizes are prepared.
Are detachably provided on the load converter 6, so that the seating attachment 7 corresponding to the maximum outer diameter of the screw member 17 can be easily replaced. Further, since the seat attachment 7 is screwed to the load converter 6, by rotating the seat attachment 7, the protruding height from the load converter 6 can be arbitrarily adjusted.

A hole 7a of the seat attachment 7 has a shaft portion 9b having a screw portion 9c at the tip and a hexagonal head 9a having a larger diameter than the shaft portion 9b provided at the base end of the shaft portion 9b. 9 is coaxially inserted with the seat attachment 7. The shaft portion 9b of the tension shaft 9 penetrates through the seating attachment 7, and the screw portion 9c at the distal end is screwed to the screw member 17 of the object to be measured, and the hexagonal head 9a at the base end portion of the driving plate 8 with a hexagonal hole. It is fitted in the hexagonal hole 8a. Then, the rotating power transmitted to the driving plate 8 with hexagonal holes is transmitted to the tension shaft 9.

The center hole 3a of the rotary shaft 3 to which the driving plate 8 with hexagonal holes is fixed has a diameter larger than the maximum outer diameter of the hexagonal head 9a of the tension shaft 9, and the center hole 3a extends from the center hole 3a. 9a
Are configured to be freely insertable and removable.

When the drive shaft 14, the worm 14a, and the worm gear 3b are rotated by the drive of the motor 20, the rotating shaft 3 transmits the rotating power. Then, the rotating power of the rotating shaft 3 is transmitted to the driving plate 8 with a hexagonal hole, and the rotating power of the driving plate 8 with a hexagonal hole is transmitted to the tension shaft 9. Thus, the tension shaft 9 applies a reaction force to the steel plate 19 via the hexagonal head 9 a of the tension shaft 9, the pedestal 10, the roller bearing 11, the load converter 6, and the seating attachment 7, and the tension according to the rotation angle. A force is applied to the welding nut 17.

As described above, since the worm gear device is used as the driving force transmitting means, a load of several tons class can be applied to the member to be measured, and the size of the motor 20 can be reduced.

The tension shaft 9 is prepared in the same manner as the seating attachment 7, in which male screws having various screw diameters are formed in the threaded portion 9c at the tip, and the stopper plug 12 is connected to the knob 13a. Since the pulling shaft 9 can be pulled out from the center hole 3a of the rotating shaft 3 by removing it, it is possible to easily replace the pulling shaft 9 with the screw diameter matching the screw diameter of the screw member 17.

Thrust bearing 1 on the upper surface of the load transducer 6
Since the roller bearing 1 is a roller bearing, it has excellent durability even when a large load is applied. When a large load is not applied, a ball bearing may be used. Also, a tapered roller bearing can be used.

Since a thick base 10 having a predetermined thickness is arranged between the thrust bearing 11 and the lower surface of the hexagonal head 9a of the tension shaft 9, the diameter of the hexagonal head 9a of the tension shaft 9 is reduced. When the contact area between the hexagonal head 9a and the thrust bearing 11 is small, it is possible to prevent the local load from acting on the thrust bearing 11 when the maximum outer diameter is smaller than the maximum outer diameter. That is, the stress propagates at an angle of 45 degrees by interposing the thick pedestal 10, so that the load uniformly acts on the thrust bearing 11. Therefore, by interposing the thick base 10, the hexagonal head 9 a of the tension shaft 9 is formed.
Can be reduced, and the size and weight can be reduced.

The cover member 5 is made of a tensile strength tester 1A.
Of the main body and a handle protruding to the side of the main body.

The load converter 6 is fixed to the cover member 5 by a first flange 6d formed at the lower end in the figure, and connects the thrust bearing 11 and the pedestal 10 by a second flange 6a formed at the upper end. It is in contact with the lower surface of the hexagonal head 9a of the tension shaft 9 through the intermediary. Thereby, it is configured to receive a reaction force of the tensile force generated in the tensile shaft 9 as a compressive force. Further, between the first flange portion 6d and the second flange portion 6a, a compressive force sensing portion 6b as a thin portion elastically deformed by receiving the compressive force is provided integrally therewith. Strain gauges 6c as measuring means for measuring the distortion of the sensing section 6b when receiving the compressive force are attached to the sensing section 6b at equal intervals around the circumference, for example, at four places, and converted into electric signals by a bridge circuit. And measure the load. In the present embodiment, the sensitivity is increased by using the sensing portion 6b as a thin portion, and a space for disposing the strain gauge 6c is secured.

The sensing portion 6b includes a first flange portion 6d,
Since the second flange portion 6a and the sensing portion 6b are fixed to the lower end portion of the cover member 5 as an integral tubular body, the first flange portion 6d and the second flange portion 6a are formed as a part of the cover member 5. It constitutes a thin portion provided between them. The strain gauge 6c is provided on the sensing portion 6b of the load converter 6 and has a tension shaft 9 based on the amount of strain (deformation) in the thrust direction.
Is measured.

FIG. 13 is a block diagram of the electrical unit for this measurement. The electrical unit 25 includes an amplifier 25a
, An A / D conversion unit 25b, a control unit 26, a display unit 25c, and a switch unit 21.

As shown in FIG. 14, the control means 26 comprises a storage means 26a, a comparing means 26b, a counting means 26c, a reverse rotation time determining means 26d, a control signal generating means 26e, and a mode switching means 26f. And can be configured using a microcomputer. The storage unit 26a can store one or both of the set value of the tensile force and the measured value of the tensile force.

The comparing means 26b can compare the measured value measured by the measuring means 6c with the set value stored in the storage means 26a. Also, the comparison means 26b
Compares the measured value stored in the storage means 26a with the measured value subsequently measured by the measuring means 6c.

The counting means 26c includes a switch 21
The rotation time based on the number of rotations from turning on of the motor 20 to stopping the motor 20 can be counted. The reverse rotation time determination means 26d can determine the reverse rotation time of the motor 20 from the rotation time based on the number of rotations counted by the counting means 26c.

The control signal generating means 26e can send a measurement start signal to the strain gauge 6c and send a rotation drive signal to the motor 20. The mode switching means 26f is provided in a break value measurement mode (step S
5 to 7), an intensity value measurement mode (modes in steps S8 to S11 described later), and a peak value measurement mode (modes in steps S12 to S17 described later).

FIG. 26 is a flowchart showing the control program. When the program is executed, in step S1, the motor 20 is started and rotates at a low speed until a predetermined time in step S2 elapses, and after the predetermined time elapses, the process proceeds to step S3. Step S3
Then, the counting means 26c is operated, and the process proceeds to step S4. In step S4, the rotation speed of the motor 20 is increased to rotate at high speed, and the process proceeds to step S5.

In step S5, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the flow advances to step S6. Step S6
Then, it is determined whether or not a break has occurred based on a sudden change in the electric signal output from the strain gauge 6c. If the break has occurred, the process proceeds to step S7, and if not, the process proceeds to step S8. In step S7, the measured value is displayed on the display unit 25c as a break value, and the process proceeds to step S18. In step S8, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S9. In step S9, the measured value of the tensile force is stored in the storage means, and the process proceeds to step S10.

In step S10, the measured value stored in step S9 is compared with the measured tensile force. If the measured value is larger, the process proceeds to step S11, and if not, the process proceeds to step S12. In step S11,
The measured value is displayed as an intensity value on the display means 25c, and the process proceeds to step S18. In step S12, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S13. In step S13, the measured value measured in step S12 is stored in the storage unit, and the process proceeds to step S14. Step S
At 14, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S15.

In step S15, the stored value (measured value) stored in step S13 is compared with the measured value measured in step S14. If the measured value is larger, the process proceeds to step S16. To step S17
Proceed to. In step S16, the measured value of step S12 stored in the storage unit is updated to the measured value of step S14 and stored, and the process returns to step S14 to measure the tensile force again.

In step S17, the stored value is displayed on the display means 25c as a peak value, and the flow advances to step S18.
In step S18, the drive torque of the motor 20 is reduced. As described above, by reducing the driving torque of the motor 20 in step S18, the load on the motor can be reduced when the base material 19 and the screw member 17 break sharply.

In step S19, the motor 20 is temporarily stopped, and the flow advances to step S20. In step S20, the counting unit 26c operated in step S3 is stopped, and the process proceeds to step S21.

In the step S21, the counting means 26c
Motor 2 for a time corresponding to the number of revolutions counted by
0 is reversed, and the process proceeds to step S22. Step S22
Then, the motor 20 is stopped.

Next, the operation of the above embodiment will be described. First, the tensile shaft 9 having a screw diameter suitable for the screw member 17 to be measured is previously attached to the tensile strength tester 1A. At the time of this attachment, first, the holding lid 13 is removed from the knob 13a, then the stopper plug 12 is pulled out from the opening of the knob 2, and then the tension shaft 9 is inserted into the center hole 3a of the rotating shaft 3 from the front end side. Next, the hexagonal head 9a on the base end side is fitted into the hexagonal hole 8a of the driving plate 8 with a hexagonal hole, and then the stopper plug 12 is screwed into the knob 13a. It is brought into contact with the hexagonal head 9a. Thereby, the axial movement of the tension shaft 9 can be prevented.

At the time of measurement, the tensile strength tester 1A
The seating portion of the seating attachment 7 is a steel plate 19 of the object to be measured.
Then, the motor 20 is rotated at a low speed to transmit a rotational force from the worm 14a to the worm gear 3b, and this rotational force is transmitted to the pulling shaft via the rotating shaft 3 and the driving plate 8 with a hexagonal hole. As a result, the tip of the tension shaft 9 is
To screw. The motor 20 is further rotated at a higher speed and the tension shaft 9 is rotated.
When the rotation angle gradually increases from the rotation angle when the seat attachment 7 comes into contact with the steel plate 19, the rotation angle is proportional to the rotation angle due to the screw action between the distal end portion and the screw member 17.
A tensile force in the direction in which the screw member 17 is pulled out is applied to the screw member 17. At this time, the screw member 17 is previously attached to the load converter 6.
Since the seating attachment 7 having an inner diameter larger than the maximum outer diameter of the seating member 7 is attached and the tension shaft 9 is coaxial with the seating attachment 7, the seating portion of the seating attachment 7 is automatically placed around the outer periphery of the screw member 17. And supports the reaction force of the tension shaft 9 via the load transducer 6, the thrust bearing 11, the pedestal 10, and the hexagonal head 9a of the tension shaft 9. Then, the reaction force of the pulling force generated in the pulling shaft 9 is transmitted to the second flange portion 6d of the load converter 6 in the reverse order of the above-described members, and is equal to the pulling force of the screw member 17 in the sensing portion 6b. A reverse compression force is applied. At this time, the thrust bearing 11 functions to reduce the rotational load of the motor 20.

The sensing portion 6b of the load transducer 6 is compressed and deformed in the axial direction by the tensile force generated on the tensile shaft 9, and the electric signal proportional to the tensile force of the screw member 17 is generated by the strain gauge 6c. Is output to the electrical unit 25 (see FIG. 13) via the receptacle connector 15, and the electrical signal is amplified by the amplifier 25a of the electrical unit 25, converted into a digital value, and displayed on the display means 25c so as to be directly readable.
The tensile force in the direction in which the screw member 17 is pulled out can be measured.

As described above, in the present embodiment, the seating portion of the seating attachment 7 is brought into contact with the upper surface of the steel plate 19 around the screw member 17 to support the tensile strength tester 1A and to fix the tip of the tensile shaft 9. Screwed to the screw member 17, the motor 20 is rotated to apply a tensile force P to the screw member 17, and the load sensor 6 provided between the hexagonal head 9 a of the tension shaft 9 and the seating attachment 7 receives the force. The portion 6b is compressed and deformed in the axial direction and the screw member 1 is formed by the strain gauge 6c and the electrical component 25.
The maximum tensile force, tensile strength, etc. of No. 7 are measured.

Further, the seat attachment 7 and the tension shaft 9 can be attached to and detached from the tensile strength tester 1A so as to correspond to the shape and dimensions of the screw member 17, and the tensile strength tester 1A
Can be easily carried, and there is no need to cut out the screw member 17 from the steel plate 19, so that the strength of the object to be measured can be easily measured at the work site.

Further, in the present embodiment, since the sensing portion 6b is a thin elastic deformation portion and the amount of the deformation is measured by the strain gauge 6c, a very simple and very small test device is realized. be able to. Moreover, since the wiring from the load transducer 6 to the electrical unit 25 is provided in the cover member 5 while having a shield structure, it is possible to improve noise resistance and prevent disconnection during work, and to improve the reliability of the measurement result. In addition to greatly improving the operability, the operability of the tester can be extremely improved.

In the tensile strength tester 1A shown in FIG.
The stopper plug 12 is inserted into the hollow portion 3a of the rotating shaft 3 to prevent the pulling shaft 9 from dropping upward. In addition, a seating attachment 7 having an inner diameter larger than the maximum outer diameter of the member to be measured (for example, a welding nut) is screwed into the remaining end of the load converter 6 that supports the tensile peeling force via the thrust bearing 11. . For this reason, the seating attachment 7 can be easily replaced according to the nominal diameter of the nut which is the screw member 17.

In the tensile strength tester according to the above embodiment, a screw is screwed into a nut or bolt connected to a metal base material such as an iron plate or a plastic base material such as ABS by welding, caulking, press-fitting, or integral molding. A screw portion 9c for applying a pulling force (axial force) to the nut or bolt according to the principle of the above is provided at the distal end portion. A tension shaft 9 having a hexagonal head 9a received via the rotary shaft 11 is rotatably provided at the rotation center of the rotational force, and is fitted to the rotational force receiving portion of the tensile shaft 9 to apply the rotational force to the tensile shaft 9. Since the hollow rotating shaft 3 having an inner diameter larger than the maximum outer diameter of the hexagonal head 9a of the pulling shaft 9 is rotatably provided coaxially with the pulling shaft 9, the pulling shaft 9 is not loosened. Changes in the nominal diameter of the measured object, wear or breakage of the tension shaft 9 Detachment exchange of drawing axis by, can be performed quickly.

Further, the steel plate 19 with the screw member 17 attached thereto
In a tensile strength tester for applying a tensile force in the direction of pulling out the screw member 17 from the steel plate and measuring the tensile strength from the tensile force, a body portion 5a which is a hollow outer cylindrical portion for fixing the seating portion 7c in contact with the steel plate. A hexagonal head 9a via a hollow rotary shaft 3 rotatably held by the trunk 5a and a driving plate 8 with hexagonal holes as connecting means so that rotational power is transmitted from the rotary shaft 3. Are connected to the screw member 17 at the tip end of the shaft portion 9b having a smaller diameter than the hexagonal head 9a, and the tension shaft 9 for applying a tensile force to the screw member 17 in accordance with the rotation angle, and the tension shaft 9 A strain gauge 6c, which is a measuring means for measuring the generated tensile force; a grip 2, which protrudes from a side surface of the body 5a; a motor 20, which is a driving means disposed in the grip 2, a motor 20; Driving force transmitting means (worm 14a, worm Since the wheel 3b) is provided, the tensile strength tester 1A can be set up vertically by holding it sideways while ensuring the exchangeability of the pulling shaft 9 from above, so that the motor 20 can stabilize even if it is automatically driven. Can be.

Since the driving force transmitting means is a worm gear device including the worm 14a on the motor 20 side and the worm gear 3b on the rotating shaft 3 meshing with the worm 14a, even a small motor 20 can be easily enlarged. It is possible to gain torque, and the degree of freedom of arrangement of the motor 20 increases,
The motor 20 can be housed inside the handle 2 of the tensile strength tester 1A.

Also, as shown in FIG. 16A, the drive shaft 14 of the motor 20 is offset from the rotation center of the rotation shaft 3, so that the handle 2 is also necessarily offset, and in particular, the handle When viewed from a direction parallel to 2,
The visibility of the positioning / setting of the tension shaft 9 with respect to the screw member 17 which is the portion to be measured can be improved.

The motor 20, the worm 14a, the worm gear 3b and the handle 2 are provided on a horizontal axis passing through the center of gravity G of the tensile strength tester 1A. As a result, stable holding properties can be secured. In addition, stabilization of the center of gravity position G can be achieved.

The rotating shaft 3 is supported by a plurality of bearings 4 spaced apart in the axial direction. Since the worm 14a and the worm gear 3b are arranged between the adjacent bearings 4, a thrust load is generated. Can be suppressed.

As shown in the tenth embodiment of FIGS. 17A and 17B, the driving force transmitting means is a bevel gear 34.
a and 23b, the motor 20 and the handle 2 can be arranged on a horizontal axis passing through the position of the center of gravity with a simple configuration.

The on / off switch 2 of the motor 20
1 is provided in the vicinity of the body 5a of the handle 2, even if the center of gravity is shifted from the center of rotation due to the offset, a force pressing the switch 21 is applied to a position close to the center of gravity G, and the pull by the action of the force is applied. The influence on the strength tester main body can be suppressed.

Further, as shown in the eleventh embodiment of FIG. 17C, the drive shaft 14 is connected to the worm 14a via the universal joint U, and the handle 2 Since the handle portion 2 is provided on a horizontal line passing through the center of rotation, the handle portion 2 is provided on a horizontal line passing through the center of rotation. Therefore, it is possible to suppress the displacement of the center of gravity G, thereby preventing the displacement of the tensile strength tester main body.

As shown in the ninth embodiment of FIG. 16 (B), the outer cylinder 5a
Since the handle portion 2B is provided, when the center of gravity G fluctuates due to the offset, the holdability can be improved in order to suppress the fluctuation of the tensile strength tester main body due to the fluctuation. Further, as shown in FIG. 16A, by disposing the switch 21 so as to be substantially opposed to the handle portion 2 with the rotation axis K interposed therebetween, the main body does not displace due to the pressing force of the switch 21.

Further, since the second handle portion 2B has a point-symmetrical shape with respect to the handle portion 2 containing the motor 20, it is possible to prevent a change in the center of gravity G due to the offset.

In the tensile strength tester 1A shown in FIG. 27, the driving plate 8 having a hexagonal hole 8a provided at the center thereof with the hexagonal head 9a of the tensioning shaft 9 is fixed to the tip of the rotating shaft 3 with the screw 16. However, in this case, a bottom may be integrally formed at the tip of the rotating shaft 3 and a driving hole (a hexagonal hole in this case) may be provided at the center of the bottom. The drive hole is not limited to a hexagon, and may have any shape as long as a rotational force can be given.

The tensile strength tester 1A shown in FIG. 27 is different from the steel plate 19 to which the screw member 17 has been attached.
Is applied via a motor 20 that drives a tension shaft 9 screwed into the screw member 17, and a tensile strength tester that measures the pulling strength from the tensile force generates a tensile force generated on the tensile shaft 19. For a predetermined time from the start of driving of the strain gauge 6c for measuring the force and the motor 20, that is, the time until the tension shaft 9 and the screw member 17 are screwed, the tension shaft 9 is rotated at a lower speed than the rotational speed at the time of measurement, and Control means 26 for controlling the rotation speed at the time of measurement after the elapse of time, that is, after screwing, so that the tension shaft 9 is measured for a predetermined time from the start of driving of the motor 20. By rotating at a lower speed than the rotation speed of
And screw member 17 is easily screwed, and after screwing after a predetermined time, the rotation speed is controlled so as to be the rotation speed at the time of measurement. Therefore, even if a driving means such as motor 20 is used, it is reliable and stable. Can be screwed together, and the measurement can be speeded up.

Further, the tensile strength tester 1A is configured such that the screw member 17 is attached to the steel plate 19 to which the screw member 17 is attached.
In a tensile strength tester for applying a pulling force in the pulling-out direction to a screw member 17 via a motor 20 for driving a pulling shaft 9 screwed into a screw member 17 and measuring the pulling strength from the pulling force, a seating portion abutting on a steel plate 19. Hollow body 5a for fixing 7c
And a hollow rotary shaft 3 rotatably held by the body 5a
The hexagonal head 9a is connected via a connecting means so that the rotating power is transmitted from the rotating shaft 3, and is screwed to the screw member 17 at the tip end of the shaft portion 9b having a smaller diameter than the hexagonal head 9a. A pulling shaft 9 for applying a pulling force corresponding to the rotation angle to the screw member 17, a strain gauge 6 c for measuring a pulling force generated on the pulling shaft 9, and a predetermined time from the start of driving of the motor 20, that is, the pulling shaft 9. Until the screw member 17 is screwed, the control means 26 controls the tension shaft 9 to rotate at a lower speed than the rotation speed at the time of measurement, and after a lapse of a predetermined time, that is, after being screwed, the rotation speed at the time of measurement. Therefore, at the connecting portion between the rotating shaft 3 and the pulling shaft 9, the turning power of the rotating shaft 3 can be transmitted to the pulling shaft 9 while absorbing the reaction force, and It is possible to prevent the loosening of the portion, For a predetermined time, the tension shaft 9 is rotated at a lower speed than the rotation speed at the time of measurement, thereby facilitating the screwing of the tension shaft 9 and the screw member 17. As a result, the screwing can be surely and stably performed even by using a driving means such as the motor 20, and the measurement can be speeded up.

The tensile strength tester has a storage means 26a for storing the set value of the tensile force, and a comparing means for comparing the measured value measured by the strain gauge 6c with the set value stored in the storage means 26a. 26b and a control signal generating means 26e for generating a control signal for stopping the motor 20 based on the comparison result of the comparing means 26b.
Therefore, the strength value can be measured based on the set value that guarantees safety, and it is possible to correspond to an object to be measured that is evaluated with the strength at a certain set value. Further, since there is no need to break the workpiece, there is no possibility that the screw member 17 bites into the tension shaft 9.

The tensile strength tester 1A stops the motor 20 when the peak value / rupture value of the tensile force is measured before the tensile force set value stored by the storage means 26a is reached. The control means 26 controls the motor 20 to stop the motor 20 unnecessarily when the data is measured to be broken early due to poor strength or the like and the data is broken. .

Further, since the tensile strength tester 1A has the display means 25c for displaying the measured peak value / break value, the peak value / break value can be displayed.
This is a small tensile strength tester that can be easily carried to a molding work site or the like to easily measure the pull-out force and inspect the pull-out strength.

The tensile strength tester 1A is provided with a storage means 2 for storing a measured value measured by the strain gauge 6c.
6a, a comparing means 26b for comparing the measured value stored in the storing means 26a with a measured value thereafter measured by the strain gauge 6c, and the motor 20 is stopped based on the comparison result of the comparing means 26b. Since the control unit 26 includes the control signal generation unit 26e that generates the control signal, the motor 20 can be stopped based on the comparison result of the comparison unit 26b.

Further, the strength of the measured object can be known only by knowing the intensity peak value, and the tensile strength tester 1A is capable of storing the set value of the tensile force. 26a, storage means 26a for storing the tensile force measurement value measured by the strain gauge 6c, and comparing means 2 for comparing the stored tensile force measurement value with the tensile force set value.
6b, when the measured tensile force is larger than the set tensile force, the set tensile force is updated to the measured tensile force and stored as the updated set tensile force, and the tensile force is measured again. And a control signal generating means for generating a control signal such that the updated tensile force set value is displayed on the display means as a peak value when the updated tensile force set value is larger than the control means. Therefore, if the measured value is lower than the stored value, the peak value is known, and the peak value can be measured by using the stored value as the peak value, whereby the intensity of the measured object can be measured.

Further, the tensile strength tester 1A controls the control signal from the control signal generating means 26e so that the control means 26 reversely rotates the motor 20 after displaying the peak value and stops the motor 20 after the reverse rotation. Therefore, it is easy to remove the screw member 17 from the tension shaft 9.

The tensile strength tester 1A has a storage means 26a for storing the set value of the tensile force and a storage means 26 for storing the measured value of the tensile force measured by the strain gauge 6c.
a, a comparing means 26b for comparing the stored measurement value and the set value, and a control signal generating means 26e for generating a control signal from the control signal generating means 26e to stop the motor 20 based on the comparison result of the comparing means 26b. The control means 26 for controlling, and if the peak value / rupture value of the tensile force is measured before reaching the tensile force set value stored by the storage means 26a, the measured peak value / rupture value is converted to the peak value / rupture value. When the measured value of the tensile force is larger than the set value of the tensile force, the set value of the tensile force is updated to the measured value of the tensile force, and the updated tensile force is displayed. The tensile force is measured again while being stored in the storage means 26a as a set value, and when the updated tensile force set value is larger, the updated tensile force set value is displayed as a peak value on the display means 2.
5c to control the driving means so as to stop the driving means. Therefore, before reaching the set tensile force value stored by the storage means 26a, the peak value of the tensile force /
When the break value is measured, the measured peak value / break value is displayed on the display means 25c as the peak value / break value and the motor 20 is stopped, so that the peak value / break value is reached before reaching the tensile force set value. Even when the break value is measured, the peak value / break value can be measured. If the measured tensile force value is larger than the set tensile force value, the set tensile force value is updated to the measured tensile force value and updated. The stored tensile force set value is stored in the storage means 26a, and the tensile force is measured again.
When the updated set value of the pulling force is larger, the updated set value of the pulling force is displayed as a peak value on the display means 25c and the motor 20 is stopped, so that the peak value can be known.

The tensile strength tester 1A controls the control means 26 to generate a control signal from the control signal generation means 26e so as to rotate the motor 20 in the reverse direction before stopping the motor 20. It is easy to remove the screw member 17 from.

The tensile strength tester 1A includes a switch 21 for turning on / off the motor 20, a counting means 26c for counting the rotation time from the time when the switch 21 is turned on to the time when the motor 20 is stopped, and a counting means 26c. Reverse rotation time determining means 26d for determining the reverse rotation time of the motor 20 based on the determined rotation time. After the set value / peak value is measured, the control means 26 determines the reverse rotation time by the reverse rotation time determining means 26d. The motor 20 is reversely rotated based on the reverse rotation time, and the control signal is generated from the control signal generating means 26e so as to stop the motor 20 after the reverse rotation time has elapsed. Motor 2 based on the forward rotation time of the motor 20
0 can be reversely rotated, and the screw member 1 can be
It is very easy to remove 7.

FIG. 35 is a front sectional view showing a tensile strength tester 1B according to the sixteenth embodiment. In the tensile strength tester 1B according to the sixteenth embodiment, the motor drive and control part is the tensile strength tester 1A according to the twelfth embodiment.
Is the same as

The seat attachment 47 is screwed to the lower end of the load converter 6 which is a compressive force sensing portion. The screw portion 47d of the seat attachment 47 is formed in a reverse thread to the screw portion 9c of the tension shaft 9. Further, the seat attachment 7 is formed with an uneven portion 47h, which is a locking means with which the broken nut 17 comes into contact. Further, the portion including the seating portion 47c, which is the tip of the seating attachment 47, is magnetized to be a magnet.

The tension shaft 9 is formed to have a length such that its tip is located above the lower end of the seat attachment 47. That is, the distal end of the tension shaft 9 is located farther back than the seating surface 47c at the lower end of the seating attachment 47.

The regulating member 4 which comes into contact with the holding lid 13
1 is provided. The regulating member 41 regulates the amount of retraction of the tension shaft 9. In other words, the hexagonal head 9a of the tension shaft 9 is not detached from the driving plate 8 with hexagonal holes. A spring 42, which is an elastic member, is disposed between the regulating member 41 and the tension shaft 9 so as to urge the tension shaft 9 downward. Instead of the spring 42, another elastic member such as rubber may be used.

FIG. 30 is a view showing a seat attachment and members to which the seat attachment is screwed.
Is a perspective view of a member to which the seating attachment is screwed, (B)
7 is a perspective view of a seating attachment, (C) is a cross-sectional view of a modification of the seating attachment, and (D) is a cross-sectional view of another modification of the seating attachment.

As shown in FIG. 30A, a ring-shaped fixing member 43 provided between the body 5a and the seating attachment 47 and press-fitted and fixed to the body 5a has a load converter 6 on its inner periphery. And a screw portion 43a for screwing the screw portion 6e of the seat attachment 47 with the screw portion 47d of the seat attachment 47. The screw portions 43a are formed at equal intervals in the circumferential direction and are separated from each other.

As shown in FIG. 30 (B), the seating attachment 47 has a hole 47b into which the tension shaft 9 fits, and the screw portions 47d screwed to the screw portions 43a are separated from each other at equal intervals in the circumferential direction. It is formed. The fixing member 43 and the seat attachment 47 are screwed together with the screw portion 43a and the screw portion 47d, and are rotated by a predetermined angle around the axis, so that the screwing is released and the positions can be adjusted in the axial direction. .

As shown in FIG. 30C, a seating attachment 47A may be provided by providing a taper portion 47f as a locking means instead of the above-mentioned uneven portion 7h.
As shown in FIG. 0 (D), for example, a hexagonal hole 47g, which is a locking means that can be engaged with the screw member 17 around the axis, may be provided as the seating attachment 47B.

As described above, according to the tensile strength tester, the base material 19 to which the screw member 17 is attached
In a tensile strength tester for applying a tensile force in the direction of pulling out the screw member 17 from the tension member 9 through the tension shaft 9 and measuring the tensile strength from the tensile force, the seating attachments 7 and 47 that come into contact with the base material 19 have a trunk portion. 5a / compression force sensing portion 6b is screwed, so that the height adjustment is facilitated by rotating the seating attachments 7, 47, and the tension shaft 9 is brought into contact with the screw member 17 and the screw is first screwed. The seating attachments 7, 47 can be brought into contact with the base material 19 at the time of fitting, and the main body can be stably screwed without shaking. Further, since the seat attachments 7, 47 are attached by screwing, the seat attachments 7, 47 can be easily replaced.

According to the tensile strength tester, the threaded portions 7d and 47d of the seat attachments 7 and 47 are
And the screw portion 9c of the seating attachment 7, 47 and the screw portion 9c of the tension shaft 9 can be prevented from rotating together.

According to the tensile strength tester, the tensile shaft 9
Is located farther inward than the distal ends of the seating attachments 7, 47, so that it is easier to adjust, and the span is shorter and the length for adjustment is shorter if the rear end is located. It is easy to set on the material 19.

Further, according to the tensile strength tester, since the locking means 7h and 47h for locking the screw member 17 are provided at the contact portions of the screw members 17 of the seating attachments 7 and 47, the seating attachments 7 and 47 can be attached. At the time of contact with the base material 19 and after the contact, the distal end portions of the seating attachments 7 and 47 are sucked by the base material 19, so that the setting property to the base material 19 can be improved.

According to the tensile strength tester, since at least the distal end of the seating attachment 4, 47 is a magnet, the seating attachment 4, 47 is brought into contact with the base material 19 and after the seating attachment 4, 47 is brought into contact with the base material 19. The tip of the 47 is sucked by the base material 19, so that the setability to the base material 19 can be improved.

Further, according to the tensile strength tester, the inner diameter shape 7, 47 of the seating attachment engages with the outer diameter shape of the screw member 17 at least in the rotation direction. The screw member 17 can be removed from the screw.

According to the tensile strength tester, the threaded portions 7d, 47d of the seating attachments 7, 47 are formed at predetermined intervals in a part in the circumferential direction, and the threaded portions of the fixing member 43 of the body 5a are formed. 43a (the thread portion of the load converter 6) is also formed at a predetermined interval in a part of the circumferential direction, and the seating attachments 7, 47 and the body portion 5a are formed so as to be freely disengageable in the axial direction according to the rotation angle of each other. Since the seating attachments 7, 47 and the body 5a / load converter 6 are formed so as to be axially disengageable in accordance with the rotation angle of each other, the seating attachments 7, 47 are moved up and down. Then, the height can be quickly adjusted.

According to the tensile strength tester, a tensile force in the direction of pulling out the screw member 17 from the base material 19 is applied to the base material 19 to which the screw member 17 is attached via the tensile member 9, and In the tensile strength tester for measuring the pull-out strength, the distal end of the tensile member 9 is located behind the distal ends of the seating attachments 7, 47 abutting on the base material 19, so that the main body is stabilized without shaking. The tension member 9 can be screwed into the screw member 1.
7 is easy to set.

Further, according to the tensile strength tester, since at least the distal ends of the seating attachments 7 and 47 are magnets, the main body can be screwed in stably without shaking. It is easy to set on the screw member 17 and the setability on the base material 19 is improved.

Further, according to the tensile strength tester, the inner diameter of the seat attachments 4, 47 is formed so as to engage with the outer diameter of the screw member 17 at least in the rotation direction. , 47 can be removed from the tension member 9.

According to the tensile strength tester, the tensile force in the direction of pulling out the screw member 17 from the base material 19 is applied to the base material 19 to which the screw member 17 is attached, and the tensile shaft 9 screwed to the screw member 17 is provided. In a tensile strength tester for measuring a pull-out strength from a tensile force applied via a driving motor 20, a hollow outer cylinder member 5a for fixing a seating portion 7c abutting on a base material 19 and a rotation of the outer cylinder member 5a A hexagonal head 9a is connected via a hollow rotary shaft 3 that is freely held and a driving plate 8 with a hexagonal hole so that rotational power is transmitted from the rotary shaft 3, and has a smaller diameter than the hexagonal head 9a. A tension shaft 9 which is screwed to the screw member 17 at the tip of the shaft portion and applies a tensile force to the screw member 17 in accordance with the rotation angle.
And the elastic member 42 for elastically holding the hexagonal head 9a of the tension shaft 9 via the stopper 13 so that the hexagonal head 9a The tension shaft 9 held by the elastic member 42 is retracted, the impact of the contact is reduced, and the reliability of screwing is greatly increased.

According to the tensile strength tester, since the amount of retraction of the tension shaft 9 is the amount of retraction of the seating attachments 7 and 47 in contact with the base material 19, the seating attachments 7 and 47 Contact is possible.

According to the tensile strength tester, the stopper means 13 for restricting the amount of pulling of the pulling shaft 9 into the stopper 13 can be prevented.
Since a is provided, the retracting amount of the tension shaft 9 can be regulated by the regulating means 41a.

According to the tensile strength tester, since at least the tip of the seat attachment is a magnet,
When the seat attachments 7 and 47 come into contact with the base material 19 and after the contact, the distal end portions of the seat attachments 7 and 47 are sucked by the base material 19, so that the setability to the base material 19 can be improved.

According to the tensile strength tester, at least the distal end of the tensile shaft 9 is magnetized, so that the screw member 17 can easily contact the distal end of the tensile shaft 9.

Further, according to the tensile strength tester, a strain gauge for applying a tensile force in a direction in which the screw member 17 is pulled out from the base material 19 to the base material 19 to which the screw member 17 is attached, and measuring the pulling strength from the tensile force. In a tensile strength tester having a tensile strength tester 6c, a storage means 26a for storing a tensile strength measurement value measured by the strain gauge 6c, a comparing means 26b for comparing the stored tensile strength measurement value with a set tensile strength value, If the measured force value is larger than the set tensile force value, the set tensile force value is updated to the measured tensile force value and stored as the updated set tensile force. When the set force value is larger, the updated tension set value is displayed as a peak value on the display means 25c, and the control means for controlling the motor 20 to reduce the driving torque is reduced. Since a 26, it is possible to measure the peak value, when the sudden rupture, it is possible to reduce the load on the motor 20.

Further, according to the tensile strength tester, the control means 26 controls the motor 20 to rotate in the reverse direction after the display, and to stop the motor 20 after the reverse rotation.
It is easy to remove the screw member from the tension member.

(10) (Regarding Display) In FIG. 19, the display section 31 amplifies the electric signal output from the strain gauge 26, converts the electric signal into a digital signal, holds the peak, and always displays the peak value. Has become.

Further, the display section 31 is provided with a mode selection switch, and according to the mode selection switch,
(A) In the setting mode, at least the set value and the measured value measured at any time are displayed. (B) In the peak value measurement mode, at least the peak value is displayed. (C) In the break value measurement mode, At least the break value is displayed. Of course, this display is based on the embodiment shown in FIGS.
5 can also be displayed in the embodiment of manual rotation such as the embodiment shown in FIG.

(11) (Seat Attachment) This seat attachment can also be applied to the embodiment shown in FIGS. 1 to 10 and the embodiment shown in FIGS. .

As shown in FIG. 27, the seat attachment 7 is screwed to the lower end of the load converter 6 which is a compressive force sensing portion. Then, the screw portion 7 of the seat attachment 7
d is formed in the threaded portion 9c of the tension shaft 9 and the reverse screw. The seat attachment 7 has a broken nut 17.
A concave / convex portion 7h, which is a locking means with which abutment is provided, is formed. Further, the portion including the seating surface 7c, which is the tip of the seating attachment 7, is magnetized to be a magnet. The tension shaft 9 is formed to have a length such that its tip is located above the lower end of the seating attachment 7. That is, the distal end of the pulling shaft 9 is disposed on the back side of the seating surface 7c at the lower end of the seating attachment 7. Further, at least the tip of the tension shaft 9 is magnetized.

[0292] The tensile strength tester 1A shown in FIG.
Is applied via a motor 20 that drives a tension shaft 9 screwed into the screw member 17, and a tensile strength tester that measures the pulling strength from the tensile force generates a tensile force generated on the tensile shaft 19. For a predetermined time from the start of driving of the strain gauge 6c for measuring the force and the motor 20, that is, the time until the tension shaft 9 and the screw member 17 are screwed, the tension shaft 9 is rotated at a lower speed than the rotational speed at the time of measurement, and Control means 26 for controlling the rotation speed at the time of measurement after the elapse of time, that is, after screwing, so that the tension shaft 9 is measured for a predetermined time from the start of driving of the motor 20. By rotating at a lower speed than the rotation speed of
And screw member 17 is easily screwed, and after screwing after a predetermined time, the rotation speed is controlled so as to be the rotation speed at the time of measurement. Therefore, even if a driving means such as motor 20 is used, it is reliable and stable. Can be screwed together, and the measurement can be speeded up.

Further, the tensile strength tester 1A is configured such that the steel plate 19 to which the screw member 17 is attached
In a tensile strength tester for applying a pulling force in the pulling-out direction to a screw member 17 via a motor 20 for driving a pulling shaft 9 screwed into a screw member 17 and measuring the pulling strength from the pulling force, a seating portion abutting on a steel plate 19. Hollow body 5a for fixing 7c
And a hollow rotary shaft 3 rotatably held by the body 5a
The hexagonal head 9a is connected via a connecting means so that the rotating power is transmitted from the rotating shaft 3, and is screwed to the screw member 17 at the tip end of the shaft portion 9b having a smaller diameter than the hexagonal head 9a. A pulling shaft 9 for applying a pulling force corresponding to the rotation angle to the screw member 17, a strain gauge 6 c for measuring a pulling force generated on the pulling shaft 9, and a predetermined time from the start of driving of the motor 20, that is, the pulling shaft 9. Until the screw member 17 is screwed, the control means 26 controls the tension shaft 9 to rotate at a lower speed than the rotation speed at the time of measurement, and after a lapse of a predetermined time, that is, after being screwed, the rotation speed at the time of measurement. Therefore, at the connecting portion between the rotating shaft 3 and the pulling shaft 9, the turning power of the rotating shaft 3 can be transmitted to the pulling shaft 9 while absorbing the reaction force, and It is possible to prevent the loosening of the portion, For a predetermined time, the tension shaft 9 is rotated at a lower speed than the rotation speed at the time of measurement, thereby facilitating the screwing of the tension shaft 9 and the screw member 17. As a result, the screwing can be surely and stably performed even by using a driving means such as the motor 20, and the measurement can be speeded up.

Further, the tensile strength tester has a storage means 26a for storing a set value of the tensile force, and a comparison means for comparing the measured value measured by the strain gauge 6c with the set value stored in the storage means 26a. 26b and a control signal generating means 26e for generating a control signal for stopping the motor 20 based on the comparison result of the comparing means 26b.
Therefore, the strength value can be measured based on the set value that guarantees safety, and it is possible to correspond to an object to be measured that is evaluated with the strength at a certain set value. Further, since there is no need to break the workpiece, there is no possibility that the screw member 17 bites into the tension shaft 9.

The tensile strength tester 1A stops the motor 20 when the peak value / rupture value of the tensile force is measured before reaching the set tensile force value stored by the storage means 26a. The control means 26 controls the motor 20 to stop the motor 20 unnecessarily when the data is measured to be broken early due to poor strength or the like and the data is broken. .

Since the tensile strength tester 1A has the display means 25c for displaying the measured peak value / break value, the peak value / break value can be displayed.
This is a small tensile strength tester that can be easily carried to a molding work site or the like to easily measure the pull-out force and inspect the pull-out strength.

[0297] The tensile strength tester 1A is provided with a storage means 2 for storing a measurement value measured by the strain gauge 6c.
6a, a comparing means 26b for comparing the measured value stored in the storing means 26a with a measured value thereafter measured by the strain gauge 6c, and the motor 20 is stopped based on the comparison result of the comparing means 26b. Since the control unit 26 includes the control signal generation unit 26e that generates the control signal, the motor 20 can be stopped based on the comparison result of the comparison unit 26b.

In addition, the strength of the measured object can be known only by knowing the intensity peak value, and the tensile strength tester 1A is capable of storing the set value of the tensile force. 26a, storage means 26a for storing the tensile force measurement value measured by the strain gauge 6c, and comparing means 2 for comparing the stored tensile force measurement value with the tensile force set value.
6b, when the measured tensile force is larger than the set tensile force, the set tensile force is updated to the measured tensile force and stored as the updated set tensile force, and the tensile force is measured again. And a control signal generating means for generating a control signal such that the updated tensile force set value is displayed on the display means as a peak value when the updated tensile force set value is larger than the control means. Therefore, if the measured value is lower than the stored value, the peak value is known, and the peak value can be measured by using the stored value as the peak value, whereby the intensity of the measured object can be measured.

Further, the tensile strength tester 1A controls the control signal from the control signal generation means 26e so that the control means 26 reversely rotates the motor 20 after displaying the peak value and stops the motor 20 after the reverse rotation. Therefore, it is easy to remove the screw member 17 from the tension shaft 9.

The tensile strength tester 1A has a storage means 26a for storing the set value of the tensile force and a storage means 26 for storing the measured value of the tensile force measured by the strain gauge 6c.
a, a comparing means 26b for comparing the stored measurement value and the set value, and a control signal generating means 26e for generating a control signal from the control signal generating means 26e to stop the motor 20 based on the comparison result of the comparing means 26b. The control means 26 for controlling, and if the peak value / rupture value of the tensile force is measured before reaching the tensile force set value stored by the storage means 26a, the measured peak value / rupture value is converted to the peak value / rupture value. When the measured value of the tensile force is larger than the set value of the tensile force, the set value of the tensile force is updated to the measured value of the tensile force, and the updated tensile force is displayed. The tensile force is measured again while being stored in the storage means 26a as a set value, and when the updated tensile force set value is larger, the updated tensile force set value is displayed as a peak value on the display means 2.
5c to control the driving means so as to stop the driving means. Therefore, before reaching the set tensile force value stored by the storage means 26a, the peak value of the tensile force /
When the break value is measured, the measured peak value / break value is displayed on the display means 25c as the peak value / break value and the motor 20 is stopped, so that the peak value / break value is reached before reaching the tensile force set value. Even when the break value is measured, the peak value / break value can be measured. If the measured tensile force value is larger than the set tensile force value, the set tensile force value is updated to the measured tensile force value and updated. The stored tensile force set value is stored in the storage means 26a, and the tensile force is measured again.
When the updated set value of the pulling force is larger, the updated set value of the pulling force is displayed as a peak value on the display means 25c and the motor 20 is stopped, so that the peak value can be known.

The tensile strength tester 1A controls the control means 26 so that the control signal is generated from the control signal generation means 26e so as to rotate the motor 20 in the reverse direction before the motor 20 is stopped. It is easy to remove the screw member 17 from.

The tensile strength tester 1A includes a switch 21 for turning on / off the motor 20, a counting means 26c for counting the rotation time from the turning on of the switch 21 to the stop of the motor 20, and a counting means 26c. Reverse rotation time determining means 26d for determining the reverse rotation time of the motor 20 based on the determined rotation time. After the set value / peak value is measured, the control means 26 determines the reverse rotation time by the reverse rotation time determining means 26d. The motor 20 is reversely rotated based on the reverse rotation time, and the control signal is generated from the control signal generating means 26e so as to stop the motor 20 after the reverse rotation time has elapsed. Motor 2 based on the forward rotation time of the motor 20
0 can be reversely rotated, and the screw member 1 can be
It is very easy to remove 7.

FIG. 28 is a front sectional view showing a tensile strength tester 1B according to the thirteenth embodiment. The seat attachment 47 is screwed to a lower end of the load converter 6 which is a compressive force sensing portion. And the seat attachment 47
The threaded portion 47d is formed in a reverse thread to the threaded portion 9c of the tension shaft 9. Further, the seat attachment 7 is formed with an uneven portion 47h, which is a locking means with which the broken nut 17 comes into contact. Further, the portion including the seating surface 47c, which is the tip of the seating attachment 47, is magnetized to be a magnet.

[0304] The tension shaft 9 is formed to have a length whose tip is located above the lower end of the seating attachment 47. That is, the distal end of the tension shaft 9 is located farther back than the seating surface 47c at the lower end of the seating attachment 47.

The regulating member 4 which comes into contact with the holding lid 13
1 is provided. The regulating member 41 regulates the amount of retraction of the tension shaft 9. In other words, the hexagonal head 9a of the tension shaft 9 is not detached from the driving plate 8 with hexagonal holes.

A spring 42, which is an elastic member, is disposed between the regulating member 41 and the tension shaft 9 so as to urge the tension shaft 9 downward. Instead of the spring 42, another elastic member such as rubber may be used.

[0307] Fig. 30 is a diagram showing a seat attachment and members to which the seat attachment is screwed.
Is a perspective view of a member to which the seating attachment is screwed, (B)
7 is a perspective view of a seating attachment, (C) is a cross-sectional view of a modification of the seating attachment, and (D) is a cross-sectional view of another modification of the seating attachment.

As shown in FIG. 30A, a ring-shaped fixing member 43 provided between the body 5a and the seating attachment 47 and fixedly pressed into the body 5a has a load converter 6 And a screw portion 43a for screwing the screw portion 6e of the seat attachment 47 with the screw portion 47d of the seat attachment 47. The screw portions 43a are formed at equal intervals in the circumferential direction and are separated from each other.

As shown in FIG. 30 (B), the seating attachment 47 has a hole 47b into which the tension shaft 9 fits, and the screw portions 47d screwed to the screw portions 43a are separated from each other at equal intervals in the circumferential direction. It is formed. The fixing member 43 and the seat attachment 47 are screwed together with the screw portion 43a and the screw portion 47d, and are rotated by a predetermined angle around the axis, so that the screwing is released and the positions can be adjusted in the axial direction. .

As shown in FIG. 30 (C), a tapered portion 47f as a locking means may be provided instead of the above-mentioned uneven portion 7h, and as shown in FIG. For example, a hexagonal hole 47g, which is a locking means capable of engaging around the axis, may be provided.

FIG. 29 is a front sectional view showing a tensile strength tester according to the fourteenth embodiment. In the tensile strength tester 1C of the fourteenth embodiment, the motor drive and control part of the tensile strength tester 1A of the twelfth embodiment is applied to the tensile strength tester 1B of the thirteenth embodiment.

As described above, according to the tensile strength tester, the tensile force in the direction of pulling out the screw member 17 from the base material 19 is applied to the base material 19 to which the screw member 17 is attached via the tensile shaft 9. In addition, in the tensile strength tester for measuring the tensile strength from the tensile force, the seating attachments 7, 47 abutting on the base material 19 are screwed to the body 5a / the load converter 6, so that the seating attachments are provided. The height adjustment is facilitated by rotating the members 7 and 47, and the seating attachments 7 and 47 can be brought into contact with the base material 19 when the tension shaft 9 is brought into contact with the screw member 17 and screwed for the first time. The main body can be screwed in stably without shaking. Further, since the seat attachments 7, 47 are attached by screwing, the seat attachments 7, 47 can be easily replaced.

Further, according to the tensile strength tester, since the threaded portions 7d and 47d of the seating attachments 7 and 47 are formed in the reverse thread with the threaded portion 9c of the tension shaft 9, the seating attachments 7 and 47 are formed. The screw portions 7d and 47d and the screw portion 9c of the tension shaft 9 can be prevented from rotating together.

Further, according to the tensile strength tester, since the distal end of the tensile shaft 9 is located farther than the distal ends of the seating attachments 7, 47, it is better to arrange the distal end of the pulling shaft 9 on the far side. It is easy to use, the span is short, the length for adjustment is short, and it is easy to set the base material 19.

Further, according to the tensile strength tester, since the locking members 7h and 47h for locking the screw member 17 are provided at the contact portions of the screw members 17 of the seat attachments 7 and 47, the seat attachments 7 and 47 are provided. When the base member 19 is brought into contact with the base material 19, and after the base member 19 comes into contact with the base material 19, the distal end portions of the seating attachments 7, 47 are sucked by the base material 19, so that the setability of the seat attachments 7 and 47 to the base material 19 can be improved.

According to the tensile strength tester, since at least the distal end of the seating attachment 4, 47 is a magnet, the seating attachment 4, 47 comes into contact with the base material 19 and after the contacting. , 47
Is sucked by the base material 19, and the setting property to the base material 19 can be improved.

Further, according to the tensile strength tester, the inner diameter shape 7, 47 of the seating attachment engages with the outer diameter shape of the screw member 17 at least in the rotating direction. 9 to screw member 17
Can be removed.

According to the tensile strength tester, the threaded portions 7d, 47d of the seating attachments 7, 47 are formed at predetermined intervals in a part of the circumferential direction, and the body 5a is formed.
The screw portion 43a of the fixing member 43 (the screw portion of the load converter 6) is also formed at a predetermined interval in a part of the circumferential direction. The seating attachments 7, 47 and the body 5a / load converter 6 are formed so as to be axially detachable in accordance with the rotation angle of each other, so that the seating attachment 7, , 47 can be moved up and down to quickly adjust the height.

Further, according to the tensile strength tester, a tensile force in the direction of pulling out the screw member 17 from the base material 19 is applied to the base material 19 to which the screw member 17 is attached, via the tensile shaft 9,
In the tensile strength tester for measuring the pull-out strength from the tensile force, since the distal end of the tensile shaft 9 is disposed at a more deep side than the distal ends of the seating attachments 7 and 47 abutting on the base material 19, the tensile shafts 4 and 47 Is located deeper than the distal ends of the seating attachments 7 and 47 that come into contact with the base material 19, so that the tensile tester main body can be stably screwed without shaking.

Further, according to the tensile strength tester, since at least the distal ends of the seating attachments 7 and 47 are magnets, the body can be stably screwed without shaking. Therefore, it is easy to set the tension shaft 9 on the screw member 17 and the setting property on the base material 19 is improved.

According to the tensile strength tester, the seat attachments 7, 47 are formed so that the inner diameter of the seat attachments 7, 47 is engaged with the outer diameter of the screw member 17 at least in the rotational direction. , 47 can remove the screw member 17 from the tension shaft 9. Thereby, if the screw member 17 and the base material 19 are broken, it is possible to prevent the screw member 17 on the back side between the tension shaft 9 and the seating attachments 7 and 47 from being difficult to be dislocated.

(In the case of a tensile strength tester aiming for easy setability)

As described above, according to the tensile strength tester shown in FIG. 27, the tensile force in the direction in which the screw member 17 is pulled out from the base material 19 is applied to the base material 19 to which the screw member 17 is attached. In addition, in the tensile strength tester that measures the tensile strength from the tensile force, the seating attachments 7 and 47 that come into contact with the base material 19 are screwed to the body 5a / the load converter 6, Seated attachment 7, 47
Is rotated, height adjustment becomes easy, and the tensioning shaft 9 is brought into contact with the screw member 17 so that the seating attachments 7, 47 can be brought into contact with the base material 19 at the time of first screwing, so that the main body is shaky. It can be screwed stably without any problem. Further, since the seat attachments 7, 47 are attached by screwing, the seat attachments 7, 47 are attached.
Replacement of 47 is easy.

Further, according to the tensile strength tester, the threaded portions 7d and 47d of the seat attachments 7 and 47 are
And the screw portion 9c of the seating attachment 7, 47 and the screw portion 9c of the tension shaft 9 can be prevented from rotating together.

According to the tensile strength tester, the tensile shaft 9
Is located farther inward than the distal ends of the seating attachments 7, 47, so that it is easier to adjust, and the span is shorter and the length for adjustment is shorter if the rear end is located. It is easy to set on the material 19.

Further, according to the tensile strength tester, since the locking means 7h and 47h for locking the screw member 17 are provided at the abutting portions of the screw members 17 of the seat attachments 7 and 47, the seat attachments 7 and 47 can be attached. At the time of contact with the base material 19 and after the contact, the distal end portions of the seating attachments 7 and 47 are sucked by the base material 19, so that the setting property to the base material 19 can be improved.

Further, according to the tensile strength tester, since at least the tip of the seat attachments 4, 47 is a magnet, the seat attachments 4, 47 are brought into contact with the base material 19 and after the contact. The tip of the 47 is sucked by the base material 19, so that the setability to the base material 19 can be improved.

Further, according to the tensile strength tester, the inner diameter shape 7, 47 of the seating attachment engages with the outer diameter shape of the screw member 17 at least in the rotation direction. The screw member 17 can be removed from the screw.

According to the tensile strength tester, the threaded portions 7d and 47d of the seat attachments 7 and 47 are formed at predetermined intervals in a part of the circumferential direction, and the threaded portions of the fixing member 43 of the body 5a. 43a (the thread portion of the load converter 6) is also formed at a predetermined interval in a part of the circumferential direction, and the seating attachments 7, 47 and the body portion 5a are formed so as to be freely disengageable in the axial direction according to the rotation angle of each other. Since the seating attachments 7, 47 and the body 5a / load converter 6 are formed so as to be axially disengageable in accordance with the rotation angle of each other, the seating attachments 7, 47 are moved up and down. Then, the height can be quickly adjusted.

(In the Case of a Tensile Strength Tester Aimed at Improving the Removability of the Screw Member) As shown in FIG. 31, the seating attachment 7 is, for example, a lower end portion of an outer cylindrical portion 5a which is a body portion of the cover member 5. The seat attachment 7 is driven by the seat attachment drive motor 30 in the vertical direction, that is, in the direction of contacting and separating from the base material 19 by the seat attachment drive motor 30.

FIG. 32 is a block diagram of the electrical unit for this measurement. The electrical unit 25 includes an amplifier 25a
, An A / D conversion unit 25b, a control unit 26, a display unit 25c, a switch unit 21, a seat attachment driving unit 27, a contact detection unit 28, and a nut detection unit 2.
9 is provided. The seat attachment driving means 2
7 includes a motor (not shown) and the like.
Similarly to the transmission of the driving force between the rotary shaft 3 and the rotary shaft 3, the seat attachment 7 is rotated substantially in the same direction as the tension shaft 9 via the worm gear device in both the forward and reverse directions, that is, is rotated.

The contact detecting means 28 detects the contact between the seat attachment 7 and the base material 19, and this detection can be detected by the torque fluctuation of the motor of the seat attachment driving means 27. Alternatively, a voltage may be applied between the seat attachment 27 and the base material 19 so that a minute current flows by conduction due to contact, and the detection may be performed. The nut detecting means 27 can detect whether or not the nut has entered a gap formed between the seating attachment and the tension shaft.

As shown in FIG. 33, the control means 26 comprises a storage means 26a, a comparing means 26b, a counting means 26c, a reverse rotation time determining means 26d, a control signal generating means 26e, and a mode switching means 26f. And can be configured using a microcomputer. The storage unit 26a can store one or both of the set value of the tensile force and the measured value of the tensile force.

The comparison means 26b can compare the measured value measured by the measurement means 6c with the set value stored in the storage means 26a. Also, the comparison means 26b
Compares the measured value stored in the storage means 26a with the measured value subsequently measured by the measuring means 6c.

The counting means 26c includes the switch 21
The rotation time based on the number of rotations from turning on of the motor 20 to stopping the motor 20 can be counted. The reverse rotation time determination means 26d can determine the reverse rotation time of the motor 20 from the rotation time based on the number of rotations counted by the counting means 26c.

The control signal generation means 26e can send a measurement start signal to the strain gauge 6c and send a rotation drive signal to the motor 20. The mode switching means 26f is provided in a break value measurement mode (step S
7-9), intensity value measurement mode (steps S12-15 described later), and peak value measurement mode (modes S16-21 described later).
Can be switched.

FIG. 34 is a flowchart showing the control program. When the program is executed, in step S1, as shown in FIG. 36A, the seat attachment drive motor 30 is started, the seat attachment 7 is extended, and the process proceeds to step S2.

In step S2, as shown in FIG. 36B, when the seat attachment 7 and the base material 19 come into contact with each other, the seat attachment drive motor 30 is stopped, and the flow advances to step S3.

In step S3, as shown in FIG. 36 (C), the motor 20 is started and is rotated at a low speed until a predetermined time in step S4 elapses. When the threaded portion 9b starts screwing into the nut 17, the process proceeds to step S5.

In step S5, the counting means 26c is operated, and the flow advances to step S6. In step S6, as shown in FIG. 36 (D), the rotation speed of the motor 20 is increased to rotate at high speed, and the process proceeds to step S7.

In step S7, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the flow advances to step S8. Step S8
Then, it is determined whether or not a break has occurred based on a sudden change in the electric signal output from the strain gauge 6c. If the break has occurred, the process proceeds to step S9, and if not, the process proceeds to step S12.

In step S9, the measured value is displayed on the display means 25c as a break value, and the flow advances to step S10. In step S10, the nut detection means 29 detects whether the nut 17 serving as a screw member is screwed into the back side between the seating attachment 7 and the tension shaft 9, and determines whether the screw 17 is screwed into the back side. If there is, the process proceeds to step S11, and if not, the process proceeds to step S22.

In step S11, the rotation of the seat attachment 7 in the feed-out direction and the rotation of the tension shaft 9 in the direction opposite to the rotation of the seat attachment 7 are performed, and the flow advances to step S22. In step S12, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the process proceeds to step S13. Step S13
Then, the measured value of the pulling force is stored in the storage means, and step S
Proceed to 14.

In step S14, the measured value stored in step S13 is compared with the measured tensile force. If the measured value is larger, the process proceeds to step S15, and if not, the process proceeds to step S16. In step S15, the measured value is displayed on the display unit 25c as an intensity value, and the process proceeds to step S22.

In step S16, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the flow advances to step S17. In step S17, the measured value measured in step S16 is stored in the storage unit, and the process proceeds to step S18.

In step S18, the tensile force is measured based on an electric signal output from the strain gauge 6c and proportional to the tensile force of the screw member, and the flow advances to step S19.

In step S19, the stored value (measured value) stored in step S17 is compared with the measured value measured in step S18. If the measured value is larger, the process proceeds to step S20. To step S21
Proceed to. In step S20, the measured value of step S16 stored in the storage means 26a is updated to the measured value of step S18 and stored, and the process returns to step S18 to measure the tensile force again.

[0348] In step S21, the stored value is displayed on the display means 25c as a peak value, and the flow advances to step S22.
In step S22, the motor 20 is temporarily stopped, and the process proceeds to step S23.

In step S23, the counting means 26c operated in step S5 is stopped, and the flow advances to step S24.

In the step S24, the counting means 26c
Motor 2 for a time corresponding to the number of revolutions counted by
0 is reversely rotated, and the process proceeds to step S25. Step S25
Then, the motor 20 is stopped.

According to the tensile strength tester shown in FIG. 31, the base member 19 to which the screw member 17 is attached
7 is applied via a motor 20 that drives a tension shaft 9 screwed into the screw member 17, and the base material 19 is applied to a tensile strength tester 1 </ b> A or 1 </ b> B that measures the pulling strength from the pulling force. Attached seat attachment 7, 47
Attachment driving means 30 for driving the seat in the approaching / separating direction
Detecting means 28 for driving the seating attachments 7 and 47 by the seating attachment driving means 30 to detect contact with the base material 19; and control means for driving the tension shaft 9 based on the detection result of the detecting means 28. 26, the seat attachments 7, 47 are detected to be in contact with the base material 19, and the tension shaft 9 is driven to stably screw the tension shaft 9 to the screw member 17. Can be.

Further, according to the tensile strength tester, since the detecting means 28 detects by the torque fluctuation of the seat attachment driving motor 30, the seat attachments 7, 4 are detected by the torque fluctuation of the seat attachment driving motor 30.
By detecting the contact of the base member 19 with the base member 19, the tension shaft 9 can be stably screwed to the screw member 17.

Further, according to the tensile strength tester, since the detecting means 28 detects by the torque fluctuation of the seat attachment driving motor 30, the seat attachments 7, 4 are detected by the torque fluctuation of the seat attachment driving motor 30.
By detecting the contact of the base member 19 with the base member 19, the tension shaft 9 can be stably screwed to the screw member 17.

As described above, according to the tensile strength tester, the base material 19 to which the screw member 17 is attached
In a tensile strength tester for applying a tensile force in the direction of pulling out the screw member 17 from the tension member 9 through the tension shaft 9 and measuring the tensile strength from the tensile force, the seating attachments 7 and 47 that come into contact with the base material 19 have a trunk portion. 5a / compression force sensing portion 6b is screwed, so that the height adjustment is facilitated by rotating the seating attachments 7, 47, and the tension shaft 9 is brought into contact with the screw member 17 and the screw is first screwed. The seating attachments 7, 47 can be brought into contact with the base material 19 at the time of fitting, and the main body can be stably screwed without shaking. Further, since the seat attachments 7, 47 are attached by screwing, the seat attachments 7, 47 can be easily replaced.

Further, according to the tensile strength tester, the threaded portions 7d and 47d of the seat attachments 7 and 47 are
And the screw portion 9c of the seating attachment 7, 47 and the screw portion 9c of the tension shaft 9 can be prevented from rotating together.

According to the tensile strength tester, the tensile shaft 9
Is located farther inward than the distal ends of the seating attachments 7, 47, so that it is easier to adjust, and the span is shorter and the length for adjustment is shorter if the rear end is located. It is easy to set on the material 19.

Further, according to the tensile strength tester, since the locking members 7h and 47h for locking the screw member 17 are provided at the contact portions of the screw members 17 of the seat attachments 7 and 47, the seat attachments 7 and 47 can be attached. At the time of contact with the base material 19 and after the contact, the distal end portions of the seating attachments 7 and 47 are sucked by the base material 19, so that the setting property to the base material 19 can be improved.

According to the tensile strength tester, since at least the distal end of the seating attachment 4, 47 is a magnet, the seating attachment 4, 47 is brought into contact with the base material 19 and after it comes into contact with the base material 19. The tip of the 47 is sucked by the base material 19, so that the setability to the base material 19 can be improved.

Further, according to the tensile strength tester, since the inner diameter shape 7, 47 of the seating attachment engages with the outer diameter shape of the screw member 17 at least in the rotating direction, if the seating attachment is rotated, the tension shaft 9 will not move. The screw member 17 can be removed from the screw.

According to the tensile strength tester, the threaded portions 7d and 47d of the seat attachments 7 and 47 are formed at predetermined intervals in a part of the circumferential direction, and the threaded portions of the fixing member 43 of the body 5a. 43a (the thread portion of the load converter 6) is also formed at a predetermined interval in a part of the circumferential direction, and the seating attachments 7, 47 and the body portion 5a are formed so as to be freely disengageable in the axial direction according to the rotation angle of each other. Since the seating attachments 7, 47 and the body 5a / load converter 6 are formed so as to be axially disengageable in accordance with the rotation angle of each other, the seating attachments 7, 47 are moved up and down. Then, the height can be quickly adjusted.

According to the tensile strength tester, a tensile force in the direction of pulling out the screw member 17 from the base material 19 is applied to the base material 19 to which the screw member 17 is attached via the tensile member 9. In the tensile strength tester for measuring the pull-out strength, the distal end of the tensile member 9 is located behind the distal ends of the seating attachments 7, 47 abutting on the base material 19, so that the main body is stabilized without shaking. The tension member 9 can be screwed into the screw member 1.
7 is easy to set.

Further, according to the tensile strength tester, since at least the distal ends of the seating attachments 7 and 47 are magnets, the main body can be stably screwed without shaking. It is easy to set on the screw member 17 and the setability on the base material 19 is improved.

According to the tensile strength tester, the inner diameter of the seat attachments 4, 47 is formed so as to engage with the outer diameter of the screw member 17 at least in the rotational direction. , 47 can be removed from the tension member 9. Also,
According to the tensile strength tester, the motor 20 that drives the tension shaft 9 that is screwed to the screw member 17 is applied to the base material 19 to which the screw member 17 is attached by applying a pulling force in the direction of pulling the screw member 17 from the base material 19. In addition, in a tensile strength tester for measuring a pull-out strength from a tensile force, a hollow outer cylinder member 5a for fixing a seating portion 7c abutting on a base material 19;
a hollow rotating shaft 3 rotatably held by the rotating shaft 3
A hexagonal head 9a is connected via a hexagonal-hole drive plate 8 so that the rotational power is transmitted from the shaft. And the elastic member 42 for elastically holding the hexagonal head 9a of the tensile shaft 9 via the stopper 13 through the stopper plug 13, so that the screw member 17 When the hexagonal head 9a comes into contact with the tension shaft 9, the tension shaft 9 whose hexagonal head 9a is held by the elastic member 42 retracts, the impact of the contact is reduced, and the reliability of screwing is greatly increased.

According to the tensile strength tester, the amount of retraction of the tension shaft 9 is the amount of retraction at which the seat attachments 7 and 47 come into contact with the base material 19. Contact is possible.

According to the tensile strength tester, the stopper 41 restricts the amount of pulling of the tension shaft 9 into the stopper 13.
Since a is provided, the retracting amount of the tension shaft 9 can be regulated by the regulating means 41a.

According to the tensile strength tester, since at least the tip of the seat attachment is a magnet,
When the seat attachments 7 and 47 come into contact with the base material 19 and after the contact, the distal end portions of the seat attachments 7 and 47 are sucked by the base material 19, so that the setability to the base material 19 can be improved.

According to the tensile strength tester, since at least the tip of the tensile shaft 9 is magnetized, it is easy to bring the screw member 17 into contact with the tip of the tensile shaft 9.

Note that the present invention is not limited to the above embodiment. That is, various modifications can be made without departing from the gist of the present invention.

[0369]

As described above, according to the present invention, when the screw member comes into contact with the tension member, the tension member whose head is held by the elastic member retracts, and the impact of the contact is reduced. It is eased, and the screwing reliability is greatly increased.

The amount of retraction of the tension member is such that the seating attachment comes into contact with the base material, so that the seating attachment can contact the base material.

Further, since the stopper is provided with the regulating means for regulating the amount of retraction of the tension shaft, the amount of retraction of the tension shaft can be regulated by the regulating means.

Also, since at least the distal end of the seat attachment is a magnet, the distal end of the seat attachment is attracted to the base material when the seat attachment is brought into contact with the base material and after the contact, so that the seat attachment can be easily set on the base material. Can be improved.

Since at least the tip of the tension shaft is magnetized, it is easy to make the screw member contact the tip of the tension shaft.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a tensile strength tester according to a first embodiment of the present invention.

FIG. 2 is a block diagram of an electrical component.

FIG. 3 is a perspective view of a tensile strength tester according to a second embodiment, cut along a plane including an axis.

4A and 4B are diagrams illustrating a tensile strength tester according to a third embodiment, wherein FIG. 4A is a perspective view cut along a plane including a shaft, FIG. 4B is an enlarged perspective view of a main part, and FIG. It is a perspective view of.

5A and 5B are diagrams showing a fourth embodiment, in which FIG. 5A is a perspective view cut along a plane including a shaft, and FIG. 5B is an enlarged perspective view of a tension shaft.

FIG. 6 is a perspective view of a tensile strength tester according to a fifth embodiment cut along a plane including an axis.

FIG. 7 is a front sectional view showing a tensile strength tester according to a sixth embodiment.

FIG. 8 is a perspective view of a tensile strength tester of a sixth embodiment cut along a plane including a shaft with a ratchet handle removed.

FIG. 9 is a perspective view of a tensile strength tester according to a sixth embodiment cut along a plane including a shaft with a ratchet handle mounted.

FIG. 10 is a perspective view of a tensile strength tester according to a seventh embodiment cut along a plane including an axis.

FIG. 11 is a front sectional view showing a tensile strength tester according to an eighth embodiment of the present invention.

FIG. 12 is a side view of the same.

FIG. 13 is a block diagram of an electrical component of the tensile strength tester of the present invention.

FIG. 14 is a block diagram showing a control unit of the tensile strength tester of the present invention.

FIG. 15 is a flowchart showing a control operation of the tensile strength tester of the present invention.

FIG. 16 is a schematic plan view of a tensile strength tester of the present invention, wherein (A) shows a tensile strength tester of an eighth embodiment,
(B) shows the tensile strength tester of the ninth embodiment.

17A and 17B are schematic diagrams showing a driving force transmitting portion of the tensile strength tester of the present invention, wherein FIG. 17A is a schematic plan view when the bevel gear of the tenth embodiment is used, and FIG. ,
(C) is a schematic plan view at the time of using the universal joint of 11th Embodiment.

FIG. 18 is a front sectional view of a tensile strength tester to which the present invention is applied.

FIG. 19 is a top view of the same.

FIG. 20 is a perspective view of the handle, in which (a) shows a state before the handle member is protruded, and (b) shows a state after the handle member is protruded.

FIG. 21 is a perspective view showing another mode of the handle.

FIG. 22 is a graph showing a relationship between a tensile force applied to a screw member and a rotation angle of the handle.

FIG. 23 is a front sectional view showing a modified example of the load converter.

FIG. 24 is a sectional view showing another mode of the conduction shaft.

FIG. 25 is a cross-sectional view showing another example of the object to be measured and the tensile shaft in another example.

FIG. 26 is a flowchart showing a control operation of the tensile strength tester of the present invention.

FIG. 27 is a front sectional view showing a tensile strength tester according to a twelfth embodiment of the present invention.

FIG. 28 is a front sectional view showing a tensile strength tester according to a thirteenth embodiment.

FIG. 29 is a front sectional view showing a tensile strength tester according to a fourteenth embodiment.

30A and 30B are views showing a seat attachment and a member to which the seat attachment is screwed, wherein FIG. 30A is a perspective view of a member to which the seat attachment is screwed, FIG. 30B is a perspective view of the seat attachment, and FIG. FIG. 13D is a cross-sectional view of a modification of the attachment, and FIG. 14D is a cross-sectional view of another modification of the seating attachment.

FIG. 31 is a front sectional view showing a tensile strength tester according to a fifteenth embodiment of the present invention.

FIG. 32 is a block diagram of an electrical unit of the tensile strength tester of the present invention.

FIG. 33 is a block diagram showing a control unit of the tensile strength tester of the present invention.

FIG. 34 is a flowchart showing a control operation of the tensile strength tester of the present invention.

FIG. 35 is a front sectional view showing a tensile strength tester according to a sixteenth embodiment.

FIG. 36 is a cross-sectional view of a main part showing a threaded engagement of a tension shaft;
(A) shows the start of the seat attachment drive motor, (B) shows the contact between the seat attachment and the base material, (C) shows the start of the screwing of the tension shaft and the nut,
(D) is a diagram showing a state in which the rotational speed of the motor is increased to measure the tensile force.

FIG. 37 is a view showing a conventional pull-out strength measuring instrument.

FIG. 38 is a front sectional view showing another embodiment relating to motor driving.

FIG. 39 is a front sectional view showing another embodiment related to motor driving.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tensile strength tester 2 Handle part 2B 2nd handle part 3 Rotation shaft (rotation member, rotation means) 3b Worm gear (drive force transmission means) 4 Bearing 5a Body part (outer cylinder part, outer cylinder means) 6c Strain gauge (measuring means) 7c Seating part 8 Drive plate with hexagonal hole (connection means, second connection part) 9 Tension shaft (tension member, tension means) 9a Hex head (first connection part) 9b Shaft part Reference Signs List 14 drive shaft of drive means 14a worm (drive force transmission means, drive means) 17 screw member 19 steel plate (base material) 20 motor (drive means) 21 on / off switch 23b bevel gear (drive force transmission means) 34a bevel gear (drive force) Transmission means) G Center of gravity position K Center of rotation of rotating member U Universal joint

Claims (19)

[Claims] 1. A tensile strength tester for applying a tensile force in a direction of pulling out a screw member from a base material to which the screw member is attached, and testing a pull-out strength from the tensile force, for contacting the base material. An outer cylinder means; a tension means for screwing a tip portion to the screw member to apply a tensile force corresponding to a rotation angle to the screw member; and rotating the tension means with respect to the outer cylinder means. A second connecting part provided on the rotating means and connected to a first connecting part located at a base end of the pulling means; and An insertion portion for inserting the pulling means from the opposite side of the second connecting portion; and when the pulling means abuts in the screw member direction, the screw member is arranged along a rotation axis. Restraining means for restraining the pulling means from moving in the direction opposite to the direction in which A tensile strength tester comprising: 2. The tensile strength tester according to claim 1, further comprising a measuring unit for measuring a tensile force generated by the tensile unit. 3. The tensile strength tester according to claim 1, wherein said suppressing means is an elastic member. 4. The tensile strength tester according to claim 1, wherein the first connecting portion and the second connecting portion are prevented from detaching from each other as the pulling means moves in the rotation axis direction. A tensile strength tester provided with a detachment preventing means. 5. The tensile strength tester according to claim 1, wherein a distal end of the outer cylinder means that contacts the base material is magnetized or has a magnet. 6. A tensile strength tester for applying a tensile force in a direction of pulling out a screw member from the base material to a base material to which the screw member is attached, and testing a pulling strength from the tensile force, comprising: an outer cylinder unit; A unit, a tension shaft, and an elastic unit. (A) The outer cylinder unit has a hollow shape, and a distal end portion thereof abuts on the base material. (B) The tension shaft has a distal end. Part, a first connection part, and a shaft body part, wherein the distal end part has a screw part screwed with the screw member, and the first connection part is a base end of the tension shaft. A protruding portion larger than the tip portion on the side, the shaft body portion is disposed between the tip portion and the protruding portion, and (c) the rotating unit has a hollow shape, The rotation unit is rotatably held in the outer cylinder unit, and the hollow shape of the rotation unit is open to at least one end. And having a second was placed inside the hollow 2
(D) connecting the first connecting portion and the second connecting portion by connecting the first connecting portion and the second connecting portion; The elastic unit has a contact portion and a fixed portion, the fixed portion is fixed to the rotating unit, the contact portion is brought into contact with a protrusion of the tension member, and the elastic unit A tensile strength tester characterized in that when the tension member comes into contact with the screw member, the upward movement along the rotation axis direction is suppressed by an elastic force. 7. The tensile strength tester according to claim 6, further comprising a measuring unit, wherein the measuring unit includes a first mounting portion, a second mounting portion,
A first body attached to the outer cylinder unit; a second body attached to the rotating unit; and a body attached to the first body. A tensile strength tester, wherein the sensor is attached to the body and measures a strain generated in the body, between the mounting part and the second mounting part. 8. The tensile strength tester according to claim 7, wherein the body has a cylindrical shape and is disposed around the tension axis. 9. The tensile strength tester according to claim 6, wherein the tip is magnetized or a magnet is attached. 10. The tensile strength tester according to claim 6, wherein the distal end is screwed to a main body of the outer tubular member. 11. The tensile strength tester according to claim 10, wherein a screw direction of the tip portion and the body portion is opposite to a screw direction of the tensile shaft. 12. The tensile strength tester according to claim 6, wherein
Further, a regulating member is provided, wherein the regulating member has at least a regulation tip and a regulation fixing portion, and the regulation tip of the regulation member and the tip of the pulling member are on opposite sides in the rotation axis direction. An interval between the end portion and the end portion is shorter than a connection length of the first connection portion and the second connection portion in a rotation axis direction, and the regulation fixing portion is fixed to the rotation unit, and A tensile strength tester, wherein the elastic member is also driven in accordance with the rotation of the rotation unit. 13. A tensile strength tester for applying a tensile force in a direction of pulling out a screw member from the base material to a base material to which the screw member is attached, and measuring a pulling strength from the tensile force, comprising: an outer cylinder member; A rotating member, a hollow member, and a plug unit. (A) The outer cylindrical member has a hollow shape, and a seating portion is held at a distal end of the outer cylindrical member to form the base material. (B) the tension shaft has a threaded portion, a shaft body, and a first connection portion, and the threaded portion is located at the tip of the tension shaft and near the seating portion. (C) screwing the screw member, the shaft body is disposed between the screwing portion and the connecting portion, and the connecting portion is larger than the shaft body and has a non-rotationally symmetric shape; The rotating member is rotatably held in the outer cylindrical member, and has a cylindrical portion and a second connecting portion. The cylindrical portion has a hollow shape, the second connecting portion has a first hole and a second hole, and the first hole includes a hole into which the shaft body can be inserted. The second hole portion is formed of a fitting hole of substantially the same shape that is larger than the hole and slightly larger than the first connecting portion, and the fitting hole is fitted with the first connecting portion. Further, the second connecting portion is disposed at an end of the cylindrical portion such that the second hole portion opens toward the inside of the cylindrical portion, (d) the hollow member includes: A first attachment portion, a second attachment portion, and a hollow body portion, wherein the first attachment portion is attached to the outer cylinder member on an inner surface of the outer cylinder member and in the seating direction, The second mounting portion abuts on the second connecting portion via a bearing disposed around a rotation axis of the shaft body, and the hollow body rotates the tension shaft. (E) the plug unit has a plug body and an elastic portion, and is disposed around the axis and provided between the first mounting portion and the second mounting portion; Is fixed to the cylindrical portion, one end of the elastic portion is held by the fixed portion, and the other end is in contact with the protrusion of the tension member, and the fixed portion is the rotating unit. And the elastic member is driven in accordance with the rotation of the rotation unit, so that when the tension shaft comes into contact with the screw member, the elastic force of the elastic portion increases along the rotation axis direction. A tensile strength tester characterized by suppressing upward movement of the tensile axis. 14. The tensile strength tester according to claim 13, wherein a displacement sensor is provided in the hollow body, and the displacement sensor measures a strain in the middle cavity. 15. The tensile strength tester according to claim 13, wherein the seating portion is screwed to a main body of the outer cylinder member in a screw direction opposite to a screw direction of the tension shaft. Tensile strength tester. 16. The tensile strength tester according to claim 13, wherein a tip of the seating portion that contacts the base material is magnetized or provided with a magnet. 17. The tensile strength tester according to claim 13, wherein the stopper unit further includes a regulating protrusion, and one end of the regulating protrusion is integrally fixed to the stopper body, and the regulating protrusion is provided. A distance between the other end of the first connecting portion and the first connecting portion is shorter than a fitting length of the first connecting portion and the second connecting portion in a rotation axis direction. . 18. A tensile strength test method in which a tensile force in a direction of pulling out a screw member from a base material is applied to a base material to which the screw member is attached, and a tensile strength is measured from the tensile force. Inserting the pulling shaft from the opening direction of the holding member, holding the pulling shaft against the rotating member, abutting the pulling shaft against the screw member, whereby the pulling shaft extends along the turning shaft direction. At this time, the elastic member biases the tension shaft in a downward direction along the direction of the rotation axis, and the holding means holding the rotation member rotatably against the base material. The screw member provided on the tension shaft is screwed to the screw member by rotating the rotation member with a driving member, and the screwing causes a pulling force corresponding to the rotation angle of the tension shaft to be screwed. A tensile strength test method, wherein the method is transmitted to a member. 19. The tensile strength test method according to claim 18, further comprising: measuring a tensile force of the screw member with respect to the base material, generated by rotating the tensile shaft. Method.