JP6767049B2 - Inter-marker elongation measuring device and inter-marker elongation measuring system including the device - Google Patents

Description

The present invention is an apparatus used together with a material strength test apparatus or the like for examining the mechanical properties of a general industrial material, and includes an intermarker elongation measuring apparatus for measuring the elongation between marked lines of a test piece and an intermarker elongation measuring apparatus thereof. It relates to an intermarker elongation measurement system composed of.

Conventionally, for example, a plate or film formed of a hard or semi-hard thermoplastic resin material, a hard or semi-hard thermosetting resin material, a fiber-reinforced thermosetting material, a plate or metal formed of a thermoplastic composite material, or the like. It is a device used together with a tensile test device when performing a tensile strength test on various materials such as rubber as well as a plate material formed of a material, etc., and is an extension between marked lines of a test piece. Various devices for measuring the elongation between marked lines for measuring the degree have been proposed and put into practical use.

Conventionally, there are various forms of this type of intermarker elongation measuring device, such as one to which a contact type elongation measuring method is applied and one to which a non-contact type elongation measuring method is applied. Among these, as a conventional inter-marker elongation measuring device to which a contact-type elongation measuring method is applied, various forms have been proposed by, for example, Japanese Patent No. 4629079.

The inter-marker elongation measuring device disclosed in Japanese Patent No. 4629079, etc. is an inter-marker elongation measuring device using a contact-type elongation measuring method, and tests each of the two stylus portions. It is configured to be brought into contact with distant parts (in parallel parts) on the surface of one piece, and each part is gripped and fixed by the above two stylus parts. Then, a tensile test is performed in this state, the displacement between the stylus portions is detected, and the distance between the marked lines of the test piece is measured.

Further, in the inter-marker elongation measuring device disclosed in the above publication, an opening / closing mechanism for opening / closing each tip of two stylus portions in order to grip a part of the test piece is used for each measurement. It is provided in the child part. The opening / closing mechanism is configured so that the operator manually operates the opening / closing mechanism as appropriate. Therefore, when the operator sets the test piece in the device before the start of the measurement test, the operator manually opens and closes the two stylus portions, and a predetermined portion of each stylus portion is set to a predetermined portion of the test piece. Perform operations such as contacting and fixing to the part.

Japanese Patent No. 4629079

Generally, in an intermarker elongation measuring device to which a contact-type elongation measuring method is applied, two stylus portions are contact-fixed to a test piece. Therefore, two stylus are measured during a measurement test. The weight of the part itself will be added to the test piece. Therefore, the weight of the stylus itself may affect the measurement test result.

Therefore, when applying the contact-type elongation measuring method, it is desirable that the weights of the two stylus portions themselves are formed as light as possible.

However, in the inter-marker elongation measuring device disclosed in Japanese Patent No. 4629079 and the like, each of the two stylus portions is provided with an opening / closing mechanism or the like for opening / closing the tip of each stylus portion. This is one of the factors that increase the weight of each stylus.

Further, in the inter-marker elongation measuring device disclosed in the above publication, the operation of the opening / closing mechanism for opening / closing the stylus is a manual operation, and when the test piece is set in the device, the operator is required to operate it. Since it is necessary to manually set each stylus each time, the operability is complicated.

On the other hand, conventionally, a tensile strength test or the like may be performed in a high temperature environment, for example. In this case, for example, the test may be performed in a high temperature environment of about 200 to 250 degrees. For this purpose, conventionally, an inter-marker elongation measuring device is used in which at least a portion of the tensile test device on which the test piece is arranged is installed in a constant temperature bath and a non-contact elongation measuring method is applied. Is common.

However, the inter-marker elongation measuring device to which the non-contact elongation measuring method is applied measures the displacement amount of the marked line mark attached to the test piece by using a video camera image, a laser beam, or the like. There is a problem that the inter-marker elongation measuring device and the entire system including the device become complicated and the price increases.

Therefore, it is convenient to use an inter-marker elongation measuring device to which a contact-type elongation measuring method is applied in a constant temperature bath. However, in the inter-marker elongation measuring device to which the conventional contact-type elongation measuring method is applied, for example, the inter-marker elongation measuring device disclosed by Japanese Patent No. 4629079, for example, two stylus. Since various electronic parts and the like are arranged in a part such as a part that should be installed in the constant temperature bath, there is a problem that this cannot be used as it is in the constant temperature bath.

The present invention has been made in view of the above points, and an object of the present invention is to measure the elongation between marked lines of a test piece held by two stylus portions. In the measuring device and the inter-marker elongation measuring system including the measuring device, the weight of the two stylus parts can be reduced, and at the same time, the opening / closing mechanism of each tip gripping part of the two stylus parts is simple. An inter-marker elongation measuring device capable of obtaining better operability and thus realizing highly accurate elongation measurement while being composed of a mechanism, and an inter-marker elongation measuring system including the same. Is to provide.

Another object of the present invention is an intermarker elongation measuring device for measuring the elongation between marked lines of a test piece gripped by two stylus portions, and an intermarker elongation including the measuring device. In the degree measurement system, an intermarker elongation measuring device capable of being used for a test in a high temperature environment using a constant temperature bath while applying a contact type elongation measuring method and a marked line elongation measuring device thereof are included. It is to provide an intermarker elongation measurement system composed of.

In order to achieve the above object, the inter-marker elongation measuring device of one aspect of the present invention is used.
In an intermarker elongation measuring device for measuring the elongation between two marked lines of a test piece gripped by two stylus portions, a pair of tip gripping mechanisms for gripping the marked line portion of the test piece are provided at the tip portion. A pair of open / close arms that are rotationally urged to each other in the direction in which the tip gripping mechanism is closed by the urging force of the screw spring are provided and slid along a guide shaft fixed to the main body of the apparatus. The stylus part opening / closing mechanism comprises two freely provided stylus portions and a stylus part opening / closing mechanism for simultaneously opening / closing the tip portions of the pair of opening / closing arms of the two stylus parts. It is fixed to the main body of the device, both ends are connected by a hinge and are pivotally supported, and is composed of a pair of angle members having a length capable of covering the entire moving region of the two stylus portions. A gripping angle that sandwiches each base end portion of each of the pair of opening / closing arms, a pair of finger members that are rotatably configured about a predetermined support shaft as a rotation center, and a tip of the pair of finger members. The stylus opening / closing mechanism includes an air cylinder that drives the pair of angle members so as to sandwich the pair of angle members, and a single actuator that opens / closes the pair of angle members with the hinge as a support shaft. When the air cylinder is driven and the tips of the pair of finger members sandwich the pair of angle members to close the state, the pair of angle members hold each of the pair of opening / closing arms of the two stylus portions. The base end portion is sandwiched and closed, and the tips of the pair of opening / closing arms of the two stylus portions are opened and the open state is maintained, while the air cylinder is driven. When the holding force of the tips of the pair of finger members on the pair of angle members is released, the pair of angle members closes the base ends of the pair of opening and closing arms of the two stylus portions. The pinching force is released, and the tips of the pair of opening / closing arms of the two stylus portions are closed.

Further, the inter-marker elongation measuring system according to one aspect of the present invention includes the above-mentioned inter-marker elongation measuring device, a tensile test device, and at least a constant temperature bath capable of realizing a high temperature environment.

According to the present invention, in an inter-marker elongation measuring device for measuring the elongation between marked lines of a test piece gripped by two stylus portions and an inter-marked elongation measuring system including the same. It is possible to reduce the weight of the two stylus portions, and at the same time, it is possible to obtain better operability while configuring the opening / closing mechanism of each tip grip portion of the two stylus portions with a simple mechanism. It is possible to provide an inter-marker elongation measuring device capable of realizing highly accurate elongation measurement and an inter-marker elongation measuring system including the device.

Further, according to the present invention, an inter-marker elongation measuring device for measuring the elongation between marked lines of a test piece gripped by two stylus portions and an inter-marker elongation measurement device including the same. In the system, a contact-type elongation measuring method is applied, but an intermarker elongation measuring device capable of being used for a test in a high temperature environment using a constant temperature bath and a configuration including the same. An inter-marker elongation measuring system can be provided.

Front view showing the structure of the intermarker elongation measuring apparatus of one Embodiment of this invention. Side view of the inter-marker elongation measuring device of FIG. Side sectional view and bottom view showing a schematic configuration of an adjustment weight portion in the inter-marker elongation measuring device of FIG. 1. Side sectional view and bottom view showing the adjustment weight used in the adjustment weight portion of FIG. Top view of the first stylus portion of the inter-marker elongation measuring device of FIG. 1 when viewed from the upper surface side. Side view of two stylus portions attached to a guide shaft in the inter-marker elongation measuring device of FIG. Front view of the two stylus portions and the two connecting and fixing members in the state of FIG. 6 as viewed from the front. Schematic plan view of the configuration of the first stylus portion and the stylus portion opening / closing mechanism in the inter-marker elongation measuring device of FIG. 1 as viewed from above. A plan view showing a configuration in the vicinity of an adjustment weight replacement opening window provided on a back plate in the inter-marker elongation measuring device of FIG. The figure which shows the arrangement example of a plurality of load detectors provided on a mounting plate in the intermarker elongation measuring apparatus of FIG. The figure which shows the arrangement example of a plurality of strain gauges for load detection provided on a mounting plate in the intermarker elongation measuring apparatus of FIG. The conceptual diagram explaining the operation of the intermarker elongation measuring apparatus of FIG. Conceptual diagram showing how the inter-marker elongation measuring device of FIG. 1 is used in a constant temperature bath.

Hereinafter, the present invention will be described with reference to the illustrated embodiments. Each drawing used in the following description is schematically shown, and in order to show each component in a size recognizable on the drawing, if the dimensional relationship and scale of each member are different for each component. It may be shown at least. Therefore, the present invention relates only to the illustrated form with respect to the quantity of each component, the shape of each component, the size ratio of each component, the relative positional relationship of each component, etc. described in each drawing. It is not limited.

[One Embodiment]
The inter-marked elongation measuring device according to the embodiment of the present invention is attached to, for example, a tensile test device (not shown) and used together with the device to measure the elongation between marked lines of a desired test piece. It is a device for.

First, the schematic configuration of the inter-marker elongation measuring device of the present embodiment will be described below mainly with reference to FIGS. 1 and 2.

1 and 2 are views showing the overall configuration of the inter-marker elongation measuring device according to the embodiment of the present invention. Of these, FIG. 1 is a front view of the inter-marker elongation measuring device of the present embodiment. In addition, in FIG. 1, a part is broken and shown in order to show the internal structure of the intermarker elongation measuring apparatus. FIG. 2 is a side view of the inter-marker elongation measuring device of the present embodiment.

As shown in FIG. 1, the intermarker elongation measuring device 1 of the present embodiment includes a device main body 2 and a base plate 3.

The base plate 3 is a base configured so that the device main body 2 of the inter-marker elongation measuring device 1 of the present embodiment can be translated with respect to a tensile test device (not shown). Due to the base plate 3, the inter-marker elongation measuring device 1 of the present embodiment is separated from the tensile test device (not shown) at a predetermined time (for example, during the setting operation of the inter-marker elongation measuring device 1). It can be placed in the retracted position, and from this state, the inter-marker elongation measuring device 1 can be placed at a predetermined position (that is, measurement) of the corresponding tensile test device (not shown) at a desired time by a simple operation. It can be placed in the position). Regarding the detailed configuration for moving the inter-marker elongation measuring device 1, it is assumed that a means generally applied in the past, for example, a rail configuration or the like is used, and detailed description thereof will be omitted.

With such a configuration, in the device main body 2 of the marked line elongation measuring device 1 of the present embodiment, when the test piece is attached to the tensile test device (not shown), the device main body 2 attaches the base plate 3 to the base plate 3. It is moved to a retracted position away from the tensile test device (not shown). On the other hand, when attaching the two stylus portions of the intermarker elongation measuring device to the test piece, the operator similarly applies force to the device main body 2 in a predetermined direction to obtain the device. The main body 2 moves toward the tensile test device (not shown) via the base plate 3 and is arranged at a predetermined measurement position.

When the device main body 2 is arranged at each predetermined position (evacuation position, measurement position) or the like, it is desirable that the position is maintained. Therefore, for example, means for maintaining each predetermined position are provided.

For example, when the device main body 2 is arranged at a predetermined measurement position of a tensile test device (not shown), a magnet portion (not shown) provided on the base plate 3 side and a magnet on the tensile test device (not shown) side. It is conceivable that the unit (not shown) is in a suction state so that the position of the device main body 2 with respect to the tensile test device (not shown) is maintained. Further, by using the same configuration at the evacuation position, a configuration for maintaining the evacuation position can be realized.

Next, the detailed configuration of the device main body 2 which is the main component of the inter-marker elongation measuring device 1 of the present embodiment will be described below. In the following description, when referring to the top and bottom, the top side of the top and bottom of the vertical extension measuring device 1 in the normal use state is referred to as the upper part or the upper side, and similarly, the ground side of the top and bottom is referred to as the upper side. It shall be the lower part or the lower side. Similarly, when referring to the left and right, the right-hand side when facing the front of the inter-marker elongation measuring device 1 is referred to as the right side, and similarly, the left-hand side is referred to as the left side.

As shown in FIGS. 1 and 2, the apparatus main body 2 includes an upper plate 9, a lower plate 10, a right side cover 11, a left side cover 12, a top cover 13, and a front cover 16 (above, FIG. 1). (See), back plate (17b; see FIG. 2), two columns (15a, 15b), two stylus parts (31, 32) (see FIG. 1 above), operating force adjustment mechanism (details). See below; 14, 33a, 33b, 26a, 26b, 27a, 27b, 28a, 28b, 24, 25, etc .; see FIG. 1), rotation sensor 39 (see FIG. 2), and pulley drive mechanism (details below; 61, 62, 63, 64, etc .; see FIG. 2, a stylus opening / closing mechanism (details will be described later; 50, 52a, 52b, 53, etc .; see FIGS. 2, 8), and a marker line setting mechanism 40 (details will be described later; It is mainly configured with (see FIGS. 2 and 6) and the like.

The upper plate 9 is a frame member provided on the upper side of the apparatus main body 2. On the upper surface side of the upper plate 9, one of a pair of first pulleys (27a, 27b) described later (see reference numeral 27a) and one of a pair of second pulleys (28a, 28b) described later. Components such as one (see reference numeral 28a) are arranged at each predetermined position.

The lower plate 10 is a frame member provided on the lower side of the apparatus main body 2. A part of the base plate 3 is movably attached and fixed to the lower side of the lower plate 10.

The right side cover 11 is a cover member that covers a part of the right side surface and the front right side of the apparatus main body 2. The left side cover 12 is a cover member that covers a part of the left side surface and the front left side of the apparatus main body 2. The front cover 16 is a cover member that covers a substantially central portion of the front surface of the apparatus main body 2.

That is, the right side cover 11, the left side cover 12, and the front cover 16 cover each internal component included in the operating force adjusting mechanism described later.

In FIG. 1, in order to show the internal configuration, each part of the right side cover 11, the left side cover 12, and the front cover 16 is broken and shown.

The top cover 13 is a cover member that covers the upper side of the apparatus main body 2. The top cover 13 covers various constituent members (upper first pulley 27a, upper second pulley 28a, etc., which will be described later) provided on the upper surface side of the upper plate 9.

The back plate (17b) shown in FIG. 2 is a cover member that covers the back surface portion of the device main body 2. In FIG. 2, since it is a side view, only one side is shown.

The two columns (15a, 15b) shown in FIG. 1 are columnar members that connect the upper plate 9 and the lower plate 10. These two columns (15a, 15b) are a first column 15a and a second column 15b. Each of these two columns (15a, 15b) is provided at a predetermined position separated in the left-right direction of the device main body 2 with the guide shaft 14 (central axis of the device main body 2) described later interposed therebetween. Each of the two columns (15a, 15b) has one end fixed to the upper plate 9 and the other end fixed to the lower plate 10.

Further, of the two columns (15a, 15b), one of a pair of first pulleys (27a, 27b), which will be described later, is located at a predetermined portion near the other end (lower end) of the first column 15a ( Reference numeral 27b) is rotatably fixedly supported. Similarly, one of a pair of second pulleys (28a, 28b) (see reference numeral 28b), which will be described later, is rotatably fixedly supported at a predetermined portion near the other end (lower end) of the second column 15b. Has been done.

The two stylus portions (31, 32) are attached to predetermined portions of the test piece (for example, marked line portions provided in parallel portions) at predetermined intervals, and are provided with a tip gripping mechanism (details will be described later) and the like. It is a constituent unit. These two stylus units (31, 32) are a first stylus unit 31 which is a first stylus unit and a second stylus unit 32 which is a second stylus unit.

These two stylus portions (31, 32) are attached to the guide shaft 14, which will be described later, at predetermined intervals so as to be slidable along the axial direction of the guide shaft 14. ing. The detailed configuration and operation of the above two stylus portions (31, 32) will be described later (mainly see FIGS. 5, 6 and the like).

The operating force adjusting mechanism is a mechanism (constituent unit) for adjusting the operating force applied to the two stylus units (31, 32), that is, the operating force applied to the test piece. This operating force adjusting mechanism includes a guide shaft 14, two adjusting weight portions 33a and 33b, two guide wires (26a and 26b), a pair of first pulleys (27a and 27b), and a pair of second pulleys. It is mainly composed of pulleys (28a, 28b), two connecting and fixing members (24, 25), and the like (see FIG. 1).

The guide shaft 14 is a member that constitutes a part of the operating force adjusting mechanism. The guide shaft 14 is a rod-shaped member provided on a substantially central shaft in the long axis direction of the device main body 2. One end of the guide shaft 14 is fixed to a substantially intermediate portion of the upper plate 9 in the left-right (horizontal) direction, and the other end is fixed to a substantially intermediate portion of the lower plate 10 in the left-right (horizontal) direction. As a result, the guide shaft 14 connects the upper plate 9 and the lower plate 10.

Further, the guide shaft 14 functions as a guide member for guiding the movement of the two stylus portions (31, 32) in the axial direction. Therefore, on the guide shaft 14, two stylus portions (31, 32) are slidably slidable along the axial direction and predetermined in the vertical direction via a predetermined bearing 59 (see FIG. 6 and the like). They are installed at intervals.

The two adjusting weight portions (33a, 33b) are units that form a part of the operating force adjusting mechanism. These two adjustment weight portions (33a, 33b) include a first adjustment weight portion 33a and a second adjustment weight portion 33b. The two adjusting weight portions (33a, 33b) are formed to have substantially the same shape and substantially the same shape.

Here, the detailed configurations of the above two adjustment weight portions (33a, 33b) will be described below mainly with reference to FIGS. 3 and 4.

FIG. 3 is a side semi-cross-sectional view showing a schematic configuration of an adjustment weight portion in the inter-marker elongation measuring device of the present embodiment. Reference numeral [D] in FIG. 3 indicates a shape seen from the bottom surface side of the auxiliary weight portion of the adjustment weight portion. FIG. 4 is a side sectional view showing an adjustment weight used in the adjustment weight portion shown in FIG. Reference numeral [E] in FIG. 4 indicates a shape seen from the bottom surface side of the adjustment weight portion.

As described above, the two adjusting weight portions, that is, the first adjusting weight portion 33a and the second adjusting weight portion 33b are formed in substantially the same shape and the same shape. Therefore, in the following description, the names "first" and "second" shall be omitted and simply abbreviated as "adjustment weight portion". Further, the two guide wires (26a, 26b) corresponding to the two adjustment weight portions (33a, 33b) are also abbreviated as "guide wires" in the same manner.

As shown in FIG. 3, the adjustment weight portions (33a, 33b) in the inter-marker elongation measuring device 1 of the present embodiment are mainly composed of a main body portion 34 and an auxiliary weight portion 36.

The main body 34 is, for example, a member having a substantially cylindrical shape as a whole. A through hole 34c that penetrates the central axis is formed in the main body 34. Guide wires (26a, 26b) are inserted and arranged in the through holes 34c. Therefore, for that purpose, the diameter of the through hole 34c is formed to be slightly larger than the diameter of the guide wires (26a, 26b).

Further, a screw hole 34d having an inner diameter larger than that of the through hole 34c is formed on the central axis of the main body 34. The screw hole 34d is formed by a predetermined length from one opening of the through hole 34c along the axial direction of the main body 34. The screw hole 34d is formed by, for example, a female screw so that the male screw portion (36b) of the auxiliary weight portion 36 described later is screwed.

Further, the main body 34 has a plurality of screw holes (three in the example of FIG. 3) communicating with the through holes 34c from the side surface of the main body 34 in a direction orthogonal to the central axis of the main body 34. 34b is formed. Screws 34a are screwed into each of the plurality (three) screw holes 34b. In this case, the tip of the screw 34a presses the guide wire (26a, 26b) in the through hole 34c so that the guide wire (26a, 26b) is pressed against the inner wall surface of the through hole 34c. As a result, the main body 34 is configured to be fixed to the guide wires (26a, 26b).

In addition, on the side surface of the main body portion 34, notch groove portions 34e that reach the through hole 34c in the radial direction are formed over both ends in the axial direction. The notch groove portion 34e is a device for easily setting the adjustment weight portion (33a, 33b) with respect to the guide wire (26a, 26b) in the stretched state.

That is, when the guide wires (26a, 26b) are inserted and arranged in the through holes 34c, the guide wires (26a, 26b) are inserted from the side surfaces of the adjusting weight portions (33a, 33b) through the notch groove portions 34e and the through holes 34c. Can be placed in.

That is, it is not necessary to insert one end of the guide wire (26a, 26b) into the through hole 34c in the axial direction from the opening, and the guide wire (26a, 26b) is installed (at this time). Even if both ends are connected), the adjustment weight portions (33a, 33b) can be arranged at a predetermined position with respect to the guide wire (26a, 26b) in a predetermined state. There is.

Therefore, the width dimension of the notch groove portion 34e is formed so as to be slightly larger than the diameter of the guide wires (26a, 26b).

The auxiliary weight portion 36 is a weight member that is connected and fixed to the main body portion 34 and has a predetermined weight. The auxiliary weight portion 36 has a weight body 36a having a substantially cylindrical shape and having a through hole 36c in the central axis, and a screw portion 36b projecting from the weight body 36a along the central axis.

Here, guide wires (26a, 26b) are inserted and arranged in the through holes 36c. Further, the screw portion 36b is screwed into the screw hole 34b of the main body portion 34 so that the auxiliary weight portion 36 and the main body portion 34 are connected and fixed.

The auxiliary weight portion 36 is also formed with a notch groove portion 36e having substantially the same width as the notch groove portion 34e of the main body portion 34. The notch groove portion 36e is formed on a side surface including the screw portion 36b.

In the adjusting weight portions (33a, 33b) configured in this way, the total weight of the main body portion 34 and the auxiliary weight portion 36 ensures a rough balance of the stylus portions described later. From this state, a plurality of fine adjustment weights 35 (see FIG. 4) are prepared for further finely adjusting the operating force applied to the stylus within an allowable range.

The fine adjustment weight 35 is formed to have substantially the same diameter as the main body portion 34, has a predetermined thickness, has a through hole 35c at a substantially central portion, and has a notch groove portion 35b on a side surface. A weight member having a predetermined weight.

Here, the width dimension of the notch groove portion 35b is formed so as to be slightly larger than the diameter of the screw portion 36b of the auxiliary weight portion 36. Further, the diameter of the through hole 35c is formed to be larger than the diameter of the guide wires (26a, 26b).

As a result, the fine adjustment weight 35 can be arranged on the screw portion 36b of the auxiliary weight portion 36 from the side surface of the adjustment weight portion (33a, 33b) through the notch groove portion 35b.

Then, when the fine adjustment weight 35 is arranged in the screw portion 36b of the auxiliary weight portion 36, a desired number is obtained by adjusting the screwing amount of the screw portion 36b of the auxiliary weight portion 36 with respect to the screw hole 34d of the main body portion 34. The fine adjustment weight 35 can be attached in the same place. After attaching the desired number of fine adjustment weights 35 to the screw portion 36b of the auxiliary weight portion 36 in this way, by further screwing the screw portion 36b, the attached fine adjustment weight 35 becomes the main body portion 34 and the auxiliary weight. It is sandwiched and fixed between the portion 36 and the portion 36.

The fine adjustment weights 35 can be made into a plurality of types of fine adjustment weights having different weights by preparing various weights having different thickness dimensions. Therefore, in order to perform the optimum weight adjustment, by appropriately selecting and attaching a plurality of types of fine adjustment weights 35 having different weights, a more accurate balance adjustment can be easily performed. ing.

The operating force can be easily adjusted and confirmed by an operation such as pulling the tip gripping mechanism of each stylus via a load measuring instrument.

As described above, in the inter-marker elongation measuring device 1 of the present embodiment, the operating force applied to the two stylus portions (31, 32) by the two adjusting weight portions (33a, 33b) is applied to the test piece. It is configured so that it can be easily adjusted so that it can follow the elongation.

The two guide wires (26a and 26b) shown in FIGS. 1 and 2 are linear members that form a part of the operating force adjusting mechanism. These two guide wires (26a, 26b) are a first guide wire 26a, which is a first wire, and a second guide wire 26b, which is a second wire.

The first guide wire 26a is a member corresponding to the first stylus portion 31. The second guide wire 26b is a member corresponding to the second stylus portion 32. The first adjustment weight portion 33a is fixedly held on the first guide wire 26a. The second adjustment weight portion 33b is fixedly held on the second guide wire 26b.

The pair of first pulleys (27a, 27b) are members that form a part of the operating force adjusting mechanism. The pair of first pulleys (27a, 27b) are members corresponding to the first stylus portion 31. The first guide wire 26a is hung on the pair of first pulleys (27a, 27b).

Of the pair of first pulleys (27a, 27b), one (upper) upper first pulley 27a is rotated to a predetermined portion near one end (upper end) of the first column 15a on the upper surface side of the upper plate 9. It is movably fixed and supported. Further, the lower first pulley 27b of the other (lower side) of the pair of first pulleys (27a, 27b) is rotatably fixedly supported at a predetermined portion near the other end (lower end) of the first column 15a. Has been done.

Similarly, the pair of second pulleys (28a, 28b) are members that form a part of the operating force adjusting mechanism. The pair of second pulleys (28a, 28b) are members corresponding to the second stylus portion 32. The second guide wire 26b is hung on the pair of second pulleys (28a, 28b).

One (upper) upper second pulley 28a of the pair of second pulleys (28a, 28b) is rotated to a predetermined portion near one end (upper end) of the first column 15a on the upper surface side of the upper plate 9. It is movably fixed and supported. Further, the lower second pulley 28b of the other (lower side) of the pair of second pulleys (28a, 28b) is rotatably fixedly supported at a predetermined portion near the other end (lower end) of the first column 15a. Has been done.

Then, the rotation shafts of the pair of first pulleys (27a, 27b) and the rotation shafts of the pair of second pulleys (28a, 28b) are respectively at predetermined positions of the apparatus main body 2. It is arranged so as to be parallel to the direction orthogonal to the axial direction (that is, the direction along the central axis of the guide shaft 14).

The two connecting and fixing members (24, 25) are members that form a part of the operating force adjusting mechanism. A part of these two connecting fixing members (24, 25) is fixed to each of the two stylus portions (31, 32), and both ends of the two guide wires (26a, 26b) are connected to each other. It is a constituent unit to be used.

Here, FIG. 7 shows two stylus portions (31, 32) attached to the guide shaft 14 and two connecting and fixing members (24, 25) fixed to the stylus portions (31, 32). ) Is a front view of the assembled state.

The two connecting and fixing members (24, 25) are a first connecting and fixing member 24 and a second connecting and fixing member 25. Of these, the first connecting / fixing member 24 is a relay member for connecting and fixing the first stylus portion 31 to the first guide wire 26a. The second connecting / fixing member 25 is a relay member for connecting and fixing the second stylus portion 32 to the second guide wire 26b. The two connecting and fixing members (24, 25) have substantially the same configuration. Therefore, each component will be described with the same reference numerals.

As shown in FIG. 7, these two connecting and fixing members (24, 25) are mainly composed of a mounting plate 18, a wire mounting screw 56, a spring mounting angle 54, and a tension adjusting tension spring 58. There is.

The mounting plate 18 is a plate-shaped member that is mounted and fixed to each of the two stylus portions (31, 32). A spring mounting angle 54 is mounted and fixed to the mounting plate 18 via a wire mounting screw 56. Each end of each of the two guide wires (26a, 26b) is connected and fixed to the wire mounting screw 56.

Further, one end of the tension adjusting tension spring 58 is connected to the spring mounting angle 54. Further, the other ends of the two guide wires (26a and 26b) are connected to the other ends of the tension adjusting tension spring 58.

With such a configuration, the first connection fixing member 24 connects the first guide wire 26a in a loop shape via the first stylus portion 31. Similarly, the second connecting / fixing member 25 connects the second guide wire 26b in a loop via the second measuring element portion 32.

Then, as shown in FIG. 1, the first guide wire 26a slides in a loop between the upper first pulley 27a on the upper plate 9 and the lower first pulley 27b at the lower end of the first column 15a. It is hung in a state where it can move. Similarly, as shown in FIG. 1, the second guide wire 26b has a loop shape between the upper second pulley 28a on the upper plate 9 and the lower second pulley 28b at the lower end of the second column 15b. It is hung in a state where it can slide on.

In this case, the first guide wire 26a has wire portions stretched in the axial direction of the device main body 2 on each of the left and right sides of the pair of upper and lower first pulleys (27a, 27b). Similarly, the second guide wire 26b has wire portions stretched in the axial direction of the device main body 2 on each of the left and right sides of the pair of upper and lower second pulleys (28a, 28b).

Then, the first stylus portion 31 is attached to one of the left and right wire portions of the first guide wire 26a via the first connecting fixing member 24. Further, the first adjustment weight portion 33a is fixed to the other of the left and right wire portions of the first guide wire 26a.

Similarly, the second stylus portion 32 is attached to one of the left and right wire portions of the second guide wire 26b via the second connecting fixing member 25. Further, the second adjustment weight portion 33b is fixed to the other of the left and right wire portions of the second guide wire 26b. In this way, the operating force adjusting mechanism is incorporated in the device main body 2.

On the other hand, the rotation sensor 39 shown in FIG. 2 detects the number of rotations or the amount of rotation per unit time of the respective rotation axes of the pair of first pulleys (27a, 27b) and the pair of second pulleys (28a, 28b). It is a sensor member for this purpose. Therefore, the rotation sensor 39 in the present embodiment is provided, for example, on the same axis as each rotation axis of the lower first pulley-27b and the lower second pulley 28b. As the rotation sensor 39, for example, a rotary encoder, a potentiometer, or the like is applied.

As another embodiment of the arrangement of the rotation sensor 39, for example, the rotation sensor 39 may be provided on each rotation shaft of the upper first pulley 27a and the upper second pulley 28a.

As shown in FIG. 2, the pulley drive mechanism includes a drive motor 61, a motor rotation shaft 62, a clutch mechanism 63, a pulley rotation shaft 64, and the like. This pulley drive mechanism is a drive mechanism provided for rotationally driving the lower first pulley-27b and the lower second pulley 28b separately and independently. Therefore, the pulley drive mechanism is provided with the lower first pulley-27b and the lower second pulley 28b, each having the same configuration.

The lower first pulley-27b and the lower second pulley 28b are rotated around the pulley rotation shaft 64. The pulley rotation shaft 64 is provided coaxially with the rotation sensor 39.

The pulley rotating shaft 64 is connected to the drive motor 61 via a clutch mechanism 63 and a motor rotating shaft 62.

The clutch mechanism 63 is a mechanism unit for receiving a rotation output from the motor rotation shaft 62 of the drive motor 61 and switching between a transmission state and a cutoff state to the pulley rotation shaft 64 at an appropriate predetermined timing. As the clutch mechanism 63, for example, an electromagnetic clutch unit that operates under electrical control is applied.

The drive motor 61 is a drive source that is controlled by a predetermined control device (not shown) to generate a rotational driving force at a predetermined timing.

The stylus opening / closing mechanism is a mechanism unit for opening / closing the tip gripping portions of the two stylus portions (31, 32). As shown in FIG. 2, this stylus opening / closing mechanism includes a gripping angle 50, an angle support arm 52a, an angle support base 52b, a gripping cylinder 53, and the like.

The gripping angle 50 is formed by a pair of left and right angle members 50a and 50b (see FIG. 8) extending in a direction parallel to the central axis of the apparatus main body 2, and the pair of left and right angle members 50a and 50b are two stylus portions. It is a constituent member that opens and closes the tip gripping portions of the two stylus portions (31, 32) by acting on each base end portion of (31, 32). Therefore, the gripping angle 50 is set to a length capable of covering the entire moving region when the two stylus portions (31, 32) move in the axial direction of the guide shaft 14.

As shown in FIG. 8 to be described later, the gripping angle 50 is configured by combining angle members having a substantially L-shaped cross section. Further, hinges 51a and 51b are provided at the upper end and the lower end of the gripping angle 50, respectively. The pair of left and right angle members 50a and 50b of the gripping angle 50 are rotatably connected to each other via the hinges 51a and 51b at the upper end and the lower end (see FIGS. 2 and 8).

As shown in FIG. 2, one end (upper end) of the gripping angle 50 is rotatably supported by the angle support arm 52a, and the other end (lower end) is rotatably supported by the angle support base 52b.

The angle support arm 52a is a support arm member provided on the upper portion of the device main body 2 and extending in a direction orthogonal to the central axis of the device main body 2. The hinge 51a at one end (upper end) of the gripping angle 50 is axially supported in a direction orthogonal to the arm axial direction of the angle support arm 52a, that is, in a direction parallel to the central axial direction of the apparatus main body 2.

The angle support base 52b is a flat plate-like member provided at the lower part of the device main body 2 and extending in a direction orthogonal to the central axis of the device main body 2. The hinge 51b at the other end (lower end) of the gripping angle 50 is axially supported in a direction orthogonal to the plane of the angle support base 52b, that is, in a direction parallel to the central axis direction of the apparatus main body 2.

The hinges 51a and 51b are provided so that the central axes of the support shafts substantially coincide with each other in the vertical direction as shown by the axis line [Ax] indicated by the alternate long and short dash line in FIG. 2 (FIG. 8). Further, the gripping angle 50 is always urged in the opening direction by the action of an urging member or the like (not shown) at the hinges 51a and 51b. The urging force of the gripping angle 50 in the opening direction is regulated by a pair of gripping fingers 53a and 53b of the gripping cylinder 53, which will be described later.

The gripping cylinder 53 is an actuator unit that acts on the base end portion of the gripping angle 50 when opening and closing the tip gripping portions of the two stylus portions (31, 32). As the gripping cylinder 53, a cylinder that has been widely used in the past can be applied. Therefore, a detailed description of the configuration will be omitted, and a brief description will be given below.

The gripping cylinder 53 internally has an air cylinder that operates by receiving the supply of compressed air from an air compressor (not shown) or the like that operates under the control of a predetermined control device (not shown) at a predetermined timing. However, it is configured to include gripping fingers 53a and 53b (see FIGS. 2 and 8) in which an opening / closing operation is performed by the action of the air cylinder.

As shown in FIG. 8, the gripping fingers 53a and 53b are a pair of finger-shaped members that are independently and rotatably provided with respect to the main body of the gripping cylinder 53. The pair of gripping fingers 53a and 53b are arranged in the vicinity of the gripping angle 50 at positions capable of acting on the pair of angle members 50a and 50b of the gripping angle 50.

Then, as described above, when the gripping cylinder 53 is operated, the pair of gripping fingers 53a and 53b rotate with each other in a predetermined direction, and the pair of angle members 50a and 50b of the gripping angle 50 are moved. The support shafts Ax (see FIGS. 2 and 8) of the hinges 51a and 51b are rotated around each other as the rotation center. At this time, for example, when the gripping cylinder 53 acts in the direction of closing the gripping angle 50, the gripping angle 50 is sandwiched between the pair of gripping fingers 53a and 53b, and the two stylus portions (31, The base end portion of 32) is sandwiched. As a result, the tip gripping portions of the two stylus portions (31, 32) are opened.

Further, when the gripping cylinder 53 operates from this state and each of the pair of gripping fingers 53a and 53b acts to release the closed state of the gripping angle 50, the gripping angle 50 has its own restoring force. The holding state of the two stylus portions (31, 32) to the base end portions is released. As a result, the tip gripping portions of the two stylus portions (31, 32) are closed by their own restoring force (details will be described later).

Next, the detailed configuration of the two stylus portions (31, 32) will be described below mainly with reference to FIGS. 5 to 8. FIG. 5 is a plan view of the first stylus portion as viewed from the upper surface side. FIG. 6 is a side view of the two stylus portions attached to the guide shaft. FIG. 7 is a front view of the two stylus portions and the two connecting and fixing members in the state of FIG. 6 as viewed from the front. FIG. 8 is a schematic plan view of the configuration of the first stylus portion and the stylus portion opening / closing mechanism as viewed from above.

As described above, the two stylus portions, that is, the first stylus portion 31 and the second stylus portion 32, are slidable independently along the axial direction of the guide shaft 14. , Are mounted on the guide shaft 14 at predetermined intervals in the axial direction (that is, in the vertical direction).

Each of these two stylus portions (31, 32) is a mark provided at a predetermined portion (for example, a parallel portion) in a test piece arranged at a predetermined portion on the side of a tensile test device or the like (not shown). It is attached at a predetermined interval in the vertical direction (the direction of the central axis of the device main body 2) with respect to the wire portion, etc.).

As shown by FIGS. 2, 6 to 8, and the like, the first stylus portion 31 of the two stylus portions (31, 32) is a stylus portion provided on the upper side of the guide shaft 14. The first stylus portion 31 includes a mounting plate 18, which is also a part of the first connecting fixing member 24 of the two connecting fixing members (24, 25), upper opening / closing arms 19a, 19b, and a bearing 59. , Arm opening / closing mechanism (details described later; 65, 66, 67, 68, 69, etc .; see FIG. 6, FIG. 7) and a pair of tip gripping mechanisms (details described later; 41, 42, etc .; FIGS. 2, FIG. 6, FIG. 7). See) and so on.

Further, of the two stylus portions (31, 32), the second stylus portion 32 is a stylus portion provided on the lower side of the guide shaft 14. The second stylus portion 32 is formed in substantially the same manner as the first stylus portion 31 (however, in a form that is upside down with respect to the first stylus portion 31). That is, the second stylus portion 32 includes a mounting plate 18, which is also a part of the second connecting fixing member 25 of the two connecting fixing members (24, 25), lower opening / closing arms 20a, 20b, and a bearing. 59, an arm opening / closing mechanism (details will be described later; 65, 66, 67, 68, 69, etc .; see FIGS. 6 and 7) and a pair of tip gripping mechanisms (details will be described later; 41, 42, etc .; FIGS. 2, 6, 6, etc.). (See FIG. 7) and the like.

The first stylus section 31 and the second stylus section 32 of the two stylus sections (31, 32) have substantially the same configuration. Therefore, in the following description, the above two stylus units (31, 32) will be described together, and the two measurements are simply performed without using the names of the first stylus unit 31 and the second stylus unit 32. Abbreviated as child part (31, 32).

The mounting plate 18 is a plate-shaped member that connects each of the two stylus portions (31, 32) and each of the two connecting and fixing members (24, 25). A through hole 18a (see FIG. 8) is formed in the mounting plate 18, and the guide shaft 14 is inserted through the through hole 18a via a bearing 59. As a result, each of the two stylus portions (31, 32) is configured to be able to move individually on the guide shaft 14 along the axial direction of the guide shaft 14.

The upper opening / closing arms 19a and 19b are a pair of arm-shaped members having a tip gripping portion for sandwiching a predetermined portion of the test piece and a base end portion sandwiched by the gripping angle 50 of the stylus opening / closing mechanism. In exactly the same manner, the lower opening / closing arms 20a and 20b are a pair of arms having a tip grip portion for sandwiching a predetermined portion of the test piece and a base end portion sandwiched by the grip angle 50 of the stylus opening / closing mechanism. It is a shaped member.

A pair of tip gripping mechanisms are provided on the tip gripping portions of the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b. This pair of tip gripping mechanisms includes a grooved guide bearing 41 and an O-ring 42. The grooved guide bearing 41 is a bearing member each having a substantially disk shape and having a groove on the outer peripheral surface. The O-ring 42 is fitted and arranged over the entire circumference on the outer peripheral surface of the grooved guide bearing 41.

The grooved guide bearings 41 are fixed to the tip portions of the upper opening / closing arms 19a and 19b and the tip portions of the lower opening / closing arms 20a and 20b as a pair by using screws 43.

With this configuration, when the tip grips of the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b are closed, a pair of grooved guide bearings 41 (grooved guide bearings 41) of the tip grips of the upper opening / closing arms 19a and 19b ( One of the marked line marks and the like on the surface portion of the test piece is gripped between the O-rings 42). Further, the other side such as the marked line mark on the surface portion of the test piece is gripped between the pair of grooved guide bearings 41 of the tip gripping portions of the lower opening / closing arms 20a and 20b.

The upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b are each formed of a pair of arm members. Each of these arm members is rotatably fixed to the mounting plate 18 by an arm opening / closing mechanism (65, 66, 67, 68, 69, etc.; see FIGS. 6 and 7) having a predetermined rotation axis as a support axis. Has been done.

The arm opening / closing mechanism includes a mounting shaft 65, a bush 66, a cylindrical spacer 67, a nut 68, a screw spring 69, and the like (see FIGS. 6 and 7).

The mounting shaft 65 and the bush 66 are shaft members that make the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b rotatable, respectively. The mounting shaft 65 and the bush 66 are arranged so as to penetrate the through holes formed in the mounting plate 18 and the through holes formed in the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b, respectively. The mounting shaft 65 and the bush 66 are fastened and fixed by nuts 68 with the cylindrical spacer 67 and the screw spring 69 sandwiched between them.

Here, the screw spring 69 is fitted and arranged along the outer peripheral surface of the cylindrical spacer 67. At this time, the screw spring 69 is arranged in a stored (charged) state around the rotation shaft (mounting shaft 65) at a position sandwiched by the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b, respectively. There is. That is, the urging force of the screw spring 69 acts on the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b so that the tip gripping portions are closed.

As the torsion spring 69, a plurality of types having different torsional forces are prepared, and the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b are appropriately replaced according to the test piece to be used. It is possible to adjust the gripping force of each of the above. Thereby, the holding force of the test piece by the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b can be adjusted.

Further, each of the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b is provided with a pair of grooved guide bearings provided at the tip portions when the tip grip portions are closed by receiving the urging force of the screw spring 69. The rotation is regulated so that the outer peripheral surfaces of the O-rings 42 of 41 do not come into contact with each other completely, that is, a slight gap is formed between the outer peripheral surfaces of the O-rings 42.

Further, as described above, the stylus opening / closing mechanism is gripped with respect to the base ends of the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b of the two stylus portions (31 and 32). When the angle 50 acts to open the tip grip portions of the two stylus portions (31, 32), the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b are respectively. They rotate against each other against the urging force of the twist spring 69. When the action of the gripping angle 50 of the stylus opening / closing mechanism is released, the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b are rotated by the urging force of each screw spring 69. , Each tip grip is closed.

The upper opening / closing arms 19a, 19b and the lower opening / closing arms 20a, 20b of the two stylus portions (31, 32) are attached to the respective predetermined portions (two locations) of the test piece. At that time, it is first necessary to open each tip gripping portion.

In the inter-marker elongation measuring device 1 of the present embodiment, the gripping cylinder 53 is operated to close the pair of gripping fingers 53a and 53b through the gripping angle 50 of the stylus opening / closing mechanism. The upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b of the two stylus portions (31 and 32) can be simultaneously opened and held in the open state. it can. This can be easily realized by controlling the operation of the gripping cylinder 53 with a predetermined control device (not shown).

In this state, after arranging each tip gripping portion at a desired position of the test piece, each tip gripping portion is simultaneously closed by performing predetermined control of the gripping cylinder 53 by a predetermined control device (not shown). Can be. As a result, predetermined portions (two locations) of the test piece can be easily sandwiched between the O-rings 42 of the pair of grooved guide bearings 41 in each tip gripping portion.

In the inter-marked line elongation measuring device 1 of the present embodiment, the setting between the marked lines can be performed by using the inter-marked line setting mechanism 40 as shown in FIGS. 2 and 6. The inter-marking line setting mechanism 40 is composed of an origin stopper 45 and a gauge length rod 46.

The origin stopper 45 is a component that is detachably configured with respect to the guide shaft 14. The origin stopper 45 is fixedly arranged at a predetermined position on the guide shaft 14 to restrict the movement of the second stylus portion 32 and position the second stylus portion 32 at a predetermined origin position. The decision is made.

The gauge length rod 46 is a component for setting the distance between the two stylus portions (31, 32) so as to be a predetermined distance. The gauge length rod 46 is made of, for example, a cylindrical part, and is configured to be removable between the two stylus portions (31, 32).

The gauge length rod 46 is arranged between the two stylus portions (31, 32), for example, sandwiched between the mounting shafts 65. As a result, the gauge length rod 46 is sandwiched between the two stylus portions (31, 32), thereby defining the distance between the two stylus portions (31, 32). Since each tip grip portion of the two stylus portions (31, 32) is configured to grip the marked line portion of the test piece, the distance between the two stylus portions (31, 32) is set. By doing so, it is possible to set between the marked lines.

A plurality of types of gauge length rods 46 having different lengths are prepared, and those having corresponding lengths are appropriately used according to the test piece to be tested.

As shown in FIG. 9, the back plate (17b) is provided with an adjustment weight replacement opening window 80 at a predetermined position.

The adjustment weight replacement opening window 80 is configured so that it can be opened and closed by a lid member 81 that can be opened and closed by using a hinge or the like. The lid member 81 is provided with a handle portion 81a and a magnet catch 82 or the like for holding the closed state.

With such a configuration, the adjustment weight replacement opening window 80 is closed by the lid member 81 in the normal state. On the other hand, when the operator desires, for example, when the weights of the two adjustment weight portions (33a, 33b) are exchanged or when the weights are adjusted, the lid member 81 is opened to obtain the desired condition. You can work on it. Therefore, the adjustment weight replacement opening window 80 is formed at a predetermined position in the two guide wires (26a, 26b) so as to be accessible to the portion where the two adjustment weight portions (33a, 33b) are arranged. Has been done.

Further, when performing a predetermined elongation measurement using the inter-marker elongation measuring device 1 of the present embodiment, a plurality of load detectors 83 are provided on each of the above mounting plates 18 (see FIG. 10). ). Further, for the same purpose, a plurality of strain gauges 84 for load detection may be provided on each of the mounting plates 18 (see FIG. 11).

The operation of the inter-marker elongation measuring device 1 of the present embodiment configured as described above will be briefly described below mainly with reference to FIG. 12 and the like. FIG. 12 is a conceptual diagram illustrating the operation of the inter-marker elongation measuring device of the present embodiment.

Here, the operator uses the tensile test device 90 as shown in FIG. 12 and the inter-marker elongation measuring device 1 of the present embodiment, and two marked lines (101, 102) attached to the test piece 100. ) Shall be measured. In this case, the intermarker elongation measuring device 1 is arranged at a predetermined position with respect to the tensile test device 90 (see FIG. 12) via the base plate 3 (not shown in FIG. 12; see FIG. 1 and the like). Has been done. Further, it is assumed that the test piece 100 to be measured for the elongation measurement is previously mounted between the pair of chuck portions 92 (see FIG. 12) of the tensile test apparatus 90.

In the inter-marker elongation measuring device 1 of the present embodiment, when the test piece 100 is attached, first, the apparatus main body 2 of the inter-marker elongation measuring device 1 is attached to the base plate 3 (see FIG. 1). It is moved to the retracted position on the outside of the tensile test device 90 (see FIG. 12).

In this case, the device main body 2 is moved linearly with respect to the tensile test device 90, for example. Due to this movement, the test piece 100 on the tensile test device 90 side and the two stylus portions (31, 32; see FIG. 1) of the intermarker elongation measuring device 1 are arranged at positions separated from each other. As a result, a working space in a predetermined area is secured in the vicinity of the tip gripping portions of the two stylus portions (31, 32; see FIG. 1) of the intermarker elongation measuring device 1.

Next, the operator mounts and arranges the gauge length rod 46 corresponding to the test piece in advance between the two stylus portions (31, 32) on, for example, the mounting shaft 65 of the second stylus portion 32.

Subsequently, the operator operates a predetermined control device (not shown) to drive the drive motor 61 and drive the clutch mechanism 63 to bring the clutch into a clutch-connected state. As a result, the rotational driving force of the drive motor 61 rotates the motor rotation shaft 62. The rotation of the motor rotation shaft 62 is transmitted to the pulley rotation shaft 64 via the clutch mechanism 63. Then, the pulley rotation shaft 64 rotates the lower first pulley-27b and the lower second pulley 28b in a predetermined direction.

Here, first, the lower second pulley 28b rotates in a predetermined direction, so that the second stylus portion 32 moves in the direction along the second guide wire 26b via the second guide wire 26b. As a result, the second stylus portion 32 comes into contact with the origin stopper-45, so that the origin position of the second stylus portion 32 is positioned and set.

Subsequently, the lower first pulley 27b rotates in a predetermined direction, so that the first stylus portion 31 moves in the direction along the first guide wire 26a via the first guide wire 26a. As a result, the first stylus portion 31 (mounting shaft 65 on the side) comes into contact with one end of the gauge length rod 46, so that the gauge length rod 46 becomes the first stylus portion 31 and the second stylus portion 32. It will be sandwiched between them. In this way, the positioning of each of the two stylus portions (31, 32) and the distance between them are set.

Further, subsequently, the operator operates a predetermined control device (not shown) to operate the gripping cylinder 53. As a result, the pair of gripping fingers 53a sandwich the gripping angle 50 and cause it to act in the closing direction. Then, the pair of gripping fingers 53a are the base ends of the upper opening / closing arms 19a and 19b of the first stylus portion 31 and the lower opening / closing arms 20a and 20b of the second stylus portion 32 via the gripping angle 50. Hold the parts at the same time. As a result, the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b of the two stylus portions (31, 32; see FIG. 1) are opened at the same time, and the open state is maintained. Will be done.

In this state, the operator moves (advances) the apparatus main body 2 linearly toward the tensile test apparatus 90 via the base plate 3 to move the tip grip portions of the two stylus portions (31, 32). The test piece 100 is brought close to a predetermined measurement site (marked line). At this time, the device main body 2 is positioned and fixed at a predetermined position with respect to the tensile test device 90.

Subsequently, the operator operates a predetermined control device (not shown) to operate the gripping cylinder 53 and operate the pair of gripping fingers 53a in the opening direction. As a result, the holding state of the gripping angle 50 is released by the pair of gripping fingers 53a. Then, the gripping angle 50 is urged in the opening direction by the action of an urging member (not shown). As a result, the upper opening / closing arms 19a and 19b of the first stylus 31 and the lower opening / closing arms 20a and 20b of the second stylus 32 are also rotated by the urging force of the screw spring 69, and the tip gripping portions are respectively. Is closed at the same time. At this time, in each tip gripping portion, a predetermined portion of the test piece 100 (two locations, the upper marked line 101 and the lower marked line 102) is simultaneously sandwiched between the O-rings 42 of the pair of grooved guide bearings 41. To.

Here, the clutch mechanism 63 is driven by a predetermined control device (not shown) to bring the clutch into the disengaged state. As a result, the two sets of pulleys (first pulleys 27a and 27b and second pulleys 28a and 28b) are released from the rotational load from the clutch mechanism 63 via the pulley rotation shaft 64.

In this way, when the mounting of the test piece 100 on the inter-marker elongation measuring device 1 is completed, the preparation for execution of the elongation measurement of the test piece 100 is completed.

When the tensile test device 90 is operated in this state, the test piece 100 is extended by moving the pair of chuck portions 92 of the tensile test device 90 in the vertical direction. Then, the tip gripping mechanism (41, 42) of each tip gripping portion moves each mounting plate 18 in a predetermined direction along the vertical direction via the upper opening / closing arms 19a and 19b and the lower opening / closing arms 20a and 20b.

At this time, the mounting plate 18 on the side of the first stylus portion 31 acts on the first guide wire 26a via the wire mounting screw 56, the spring mounting angle 54, and the tension adjusting tension spring 58, and the first guide wire 26a A pair of upper and lower first pulleys 27a and 27b are rotated via the wire.

On the other hand, the mounting plate 18 on the second stylus portion 32 side is restrained from moving downward by the origin stopper-45. Further, in the upward direction, the second pulleys 28a and 28b are rotated by acting in the same manner as the mounting plate 18 on the first stylus portion 31 side.

Then, the rotation angle of the rotation sensor 39 proportional to the moving distance of the two stylus portions (31, 32) is output as a voltage, and the elongation between the marked lines is measured from the output difference.

As described above, according to the above-described embodiment, the stylus opening / closing mechanism for opening / closing the tip gripping portions of the two stylus portions (31, 32) is provided with the stylus portions (31, 32). Is configured as a separate body and is arranged at a portion separated from each stylus portion (31, 32).

By adopting such a configuration, the configuration of each stylus unit (31, 32) itself can be simplified, and the weight of each stylus unit (31, 32) can be reduced. Therefore, this makes it possible to reduce the weight applied to the test piece during the measurement test, so that even in the inter-marker elongation measuring device 1 to which the contact-type elongation measuring method is applied, the elongation is measured with higher accuracy. It can be performed.

The stylus opening / closing mechanism uses a single actuator unit (grasping cylinder 53) to hold the gripping angle 50 arranged in the axially moving regions of the two stylus portions (31, 32). By acting on the base end portions of the two stylus portions (31, 32), the tip grip portions of the two stylus portions (31, 32) are opened and closed at the same time.

By adopting such a configuration, by driving and controlling a single gripping cylinder 53, each tip gripping portion of the two stylus portions (31, 32) can be opened and closed simultaneously and by remote control. it can. Therefore, as a result, the opening / closing operation can always be easily performed regardless of the position of the two stylus portions (31, 32) in the moving region.

Further, since the tip gripping portions of the two stylus portions (31, 32) can be opened and closed at the same time by one operation, the two stylus portions (31, 32) can be opened and closed more easily and faster. And it can be accurately arranged for two marked lines.

In this way, the weight of the two stylus portions (31, 32) can be easily reduced, and at the same time, good operability can be obtained while realizing the stylus portion opening / closing mechanism with a simple mechanism. Therefore, highly accurate elongation measurement can be realized.

Further, the inter-marker elongation measuring device 1 of the present embodiment is provided with a pulley drive mechanism (drive motor 61, motor rotation shaft 62, clutch mechanism 63, pulley rotation shaft 64), and an inter-marker line setting mechanism 40 (origin). A stopper 45 and a gauge length rod 46) are provided.

By adopting such a configuration, in the inter-marker elongation measuring device 1 of the present embodiment, the distance between the two stylus portions (31, 32), that is, the setting between the marked lines is automatically set by remote control. Can be done.

As described above, according to the inter-marker elongation measuring device 1 of the present embodiment, the stylus opening / closing mechanism is used to set the two stylus portions (31, 32) to the marked line portions and the two stylus. It is possible to easily realize the automation of operations such as setting between units (31 and 32) (that is, setting between marked lines). Therefore, the operability of the device can be remarkably improved.

By the way, the inter-marker elongation measuring device 1 of the above embodiment can also be used in a tensile strength test in a high temperature environment, for example, using a constant temperature bath or the like.

That is, in a tensile strength test or the like in a high temperature environment using a constant temperature bath, at least the vicinity of the portion where the test piece of the tensile test device is installed and a part of the inter-marked elongation measuring device (the marked line portion of the test piece). (Near the stylus part that grips) is installed in a constant temperature bath.

In this case, it is desirable that various electronic parts and the like are not arranged in the portion installed in the constant temperature bath of the tensile test device and the inter-marker elongation measuring device. In the inter-marker elongation measuring device 1 of the present embodiment, as described above, the two stylus portions (31, 32) simply mechanically sandwich a predetermined portion (marked portion portion) of the test piece. It only has a mechanism. Therefore, the inter-marker elongation measuring device 1 having such a configuration applies the contact-type elongation measuring method, and can be used without any problem in the test in a constant temperature bath in a high temperature environment. Can be done.

FIG. 13 is a conceptual diagram showing how the inter-marker elongation measuring device 1 of the present embodiment is used in a constant temperature bath.

The constant temperature bath 5 shown in FIG. 13 is a device having a function of maintaining the room temperature of the tank inner chamber 5a sealed from the outside in, for example, a desired temperature environment. Specifically, the constant temperature bath 5 is used when performing a tensile test or the like in a high temperature environment of, for example, about 200 degrees Celsius to 250 degrees Celsius. As the constant temperature bath 5 itself, a form that is generally popular in the past can be applied. Therefore, the detailed description of the configuration will be omitted.

As shown in FIG. 13, a portion of the constant temperature bath 5 in the chamber 5a, which is a part of the inter-marker elongation measuring device 1 of the present embodiment and includes at least two transducers 31, 32. And at least a part where the test piece is installed, which is a part of the tensile test apparatus 4, is installed.

Measurement of other parts of the inter-marker elongation measuring device 1 where at least electrical components are provided, that is, a part including a rotation sensor 39 and a drive motor 61 of the pulley drive mechanism. The gripping cylinder 53 and the like of the child portion opening / closing mechanism are installed outside the tank inner chamber 5a of the constant temperature bath 5.

Similarly, other parts of the tensile test device 4, such as a portion provided with at least an electrical component, are also installed outside the inner chamber 5a of the constant temperature bath 5.

Then, in the state shown in FIG. 13, the inter-marker elongation measuring device 1 of the present embodiment is configured to be able to linearly move in the arrow X direction of FIG. 13 with respect to the tensile test device 4.

Window portions 5c and 5d that can access the room are formed in the upper and lower portions (ceiling portion and floor portion) of the tank inner chamber 5a of the constant temperature bath 5, and the windows 5c and 5d are formed through the windows 5c and 5d. A part of the inter-marking elongation measuring device 1 and the tensile test device 4 is positioned to be inserted into the room. Then, in that state, the window portions 5c and 5d are sealed with respect to the outside, and are configured to maintain the sealed state.

As described above, in the inter-marker elongation measuring device 1 of the present embodiment, the electrical components such as the rotation sensor 39, the drive motor 61 of the pulley drive mechanism, and the gripping cylinder 53 of the stylus opening / closing mechanism are provided. Since the two stylus portions (31, 32) are arranged at positions apart from the two stylus portions (31, 32), the two stylus portions (31, 32) are installed in the chamber 5a of the constant temperature bath 5, and the above electrical Various components and the like can be installed outside the tank inner chamber 5a. Therefore, the inter-marker elongation measuring device 1 of the present embodiment is generally used without any special treatment even in a test performed using the constant temperature bath 5, for example, a tensile test in a high temperature environment. It can be used in exactly the same way as when conducting tests in a normal environment.

In the present embodiment, the tensile test device used together with the inter-marker elongation measuring device 1 is described by exemplifying a device in which the tensile direction of the test piece is upward, but this embodiment is used. It is not limited. In addition to this form, for example, a tensile test device in which the tensile direction of the test piece is downward may be used. In addition, the inter-marker elongation measuring device 1 of the present embodiment can be similarly applied to various types of tensile test devices.

The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications and applications can be carried out within a range that does not deviate from the gist of the invention. Further, the above-described embodiment includes inventions at various stages, and various inventions can be extracted by an appropriate combination of a plurality of disclosed constituent requirements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the above embodiment, if the problem to be solved by the invention can be solved and the effect of the invention is obtained, this constituent requirement is deleted. The configured configuration can be extracted as an invention. In addition, components across different embodiments may be combined as appropriate. The present invention is not constrained by any particular embodiment thereof except as limited by the accompanying claims.

1 ... Intermarker elongation measuring device, 2 ... Device body, 3 ... Base plate,
4 ... Tensile test equipment, 5 ... Constant temperature bath, 5a ... Tank chamber, 5c, 5d ... Window,
9 ... Upper plate, 10 ... Lower plate, 11 ... Right side cover, 12 ... Left side cover, 13 ... Top cover, 14 ... Guide shaft, 15a ... 1st column, 15b ... 2nd column, 16 …… Table cover,
18 ... Mounting plate, 18a ... Through hole, 19a, 19b ... Upper opening / closing arm, 20a, 20b ... Lower opening / closing arm,
24 ... 1st connecting fixing member, 25 ... 2nd connecting fixing member, 26a ... 1st guide wire, 26b ... 2nd guide wire, 27a, 27b ... 1st pulley, 27a ... Upper 1st pulley , 27b ... Lower first pulley, 28a, 28b ... Second pulley, 28a ... Upper second pulley, 28b ... Lower second pulley,
31 …… 1st stylus part, 32 …… 2nd stylus part,
33a …… 1st adjustment weight part, 33b …… 2nd adjustment weight part,
34 ... Main body, 34a ... Screw, 34b ... Screw hole, 34c ... Through hole, 34d ... Screw hole, 34e ... Notch groove,
35 ... Fine adjustment weight, 35b ... Notch groove, 35c ... Through hole,
36 ... Auxiliary weight part, 36a ... Weight body, 36b ... Screw part, 36c ... Through hole, 36e ... Notch groove part,
39 …… Rotation sensor,
40 …… Marking line setting mechanism, 41 …… Grooved guide bearing, 42 …… O-ring, 43 …… Screw,
45 …… Origin stopper, 46 …… Gauge length rod,
50 ... Gripping angle, 50a, 50b ... A pair of angle members, 51a, 51b ... Hinges, 52a ... Angle support arm, 52b ... Angle support base, 53 ... Gripping cylinder, 53a, 53b ... Gripping For fingers,
54 ... Spring mounting angle, 56 ... Wire mounting screw, 58 ... Tension adjustment tension spring, 59 ... Bearing,
61 ... drive motor, 62 ... motor rotating shaft, 63 ... clutch mechanism, 64 ... pulley rotating shaft,
65 ... Mounting shaft, 66 ... Bush, 67 ... Cylindrical spacer, 68 ... Nut, 69 ... Screw spring,
80 …… Adjustment weight replacement opening window, 81 …… Lid member, 81a …… Handle part, 82 …… Magnet catch,
83 …… Load detector, 84 …… Strain gauge for load detection 90 …… Tensile test device, 92 …… Chuck part 100 …… Test piece, 101 …… Upper marked line, 102 …… Lower marked line

Claims (4)

In an intermarker elongation measuring device that measures the elongation between two marked lines of a test piece gripped by two stylus portions.
A pair of tip gripping mechanisms for gripping the marked line portion of the test piece are provided at the tip portion, and a pair of opening / closing arms that are rotationally urged to each other in the direction of closing the tip gripping mechanism by the urging force of the screw spring are provided. Two stylus parts that are configured to have and are slidably movable along a guide shaft fixed to the main body of the device.
A stylus opening / closing mechanism that opens / closes the tips of each pair of opening / closing arms of the two stylus at the same time.
Equipped with
The stylus opening / closing mechanism is
It is fixed to the main body of the device, both ends are connected by hinges and are pivotally supported, and is composed of a pair of angle members having a length capable of covering the entire moving area of the two stylus portions. A gripping angle that sandwiches each base end of each of the pair of opening / closing arms of the portion,
The pair includes a pair of finger members that are rotatable about each other with a predetermined support shaft as a rotation center, and an air cylinder that drives the tips of the pair of finger members to sandwich the pair of angle members. A single actuator that opens and closes the angle member of the above with the hinge as the support axis,
Equipped with
The stylus opening / closing mechanism is
When the air cylinder is driven and the tips of the pair of finger members sandwich the pair of angle members to close the state, the pair of angle members hold each of the pair of opening / closing arms of the two stylus portions. The base end portion is sandwiched and closed, and the tips of the pair of opening and closing arms of the two stylus portions are opened and maintained in the open state.
When the air cylinder is driven and the holding force of the tips of the pair of finger members on the pair of angle members is released, the pair of angle members are placed on each of the pair of opening / closing arms of the two stylus portions. The holding force that closes the base end is released, and each tip of each pair of opening and closing arms of the two stylus is closed.
Between marked lines elongation measuring device comprising a call. An operating force adjusting mechanism that separately adjusts each operating force so that each operating force applied to each of the two measuring slaves can follow the elongation of the test piece with the minimum operating force.
A pulley drive mechanism equipped with a drive source that separately drives the operating force adjustment mechanism, and
By driving each of the operating force adjusting mechanisms via the pulley drive mechanism and sliding and moving the two stylus portions along the guide shaft, measurement of one of the two stylus portions is performed. An inter-marker setting mechanism that positions the slaves at a predetermined origin position and positions each of the above two gauge heads,
The intermarker elongation measuring apparatus according to claim 1, further comprising. The pulley drive mechanism
A drive source that has a rotating shaft and drives the operating force adjustment mechanism,
A clutch mechanism that is interposed between the drive source and the operating force adjusting mechanism and switches between a transmission state and a cutoff state of the rotational driving force from the driving source to the operating force adjusting mechanism.
The intermarker elongation measuring apparatus according to claim 2, wherein the device is configured to include . The intermarker elongation measuring device according to any one of claims 1 to 3 .
Tensile test equipment and
At least a constant temperature bath that can realize a high temperature environment,
An inter-marker elongation measurement system characterized by comprising.

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