JPH07110230A - Digital display type measuring tape - Google Patents

Abstract

PURPOSE:To easily and accurately measure each dimension of a long object to be measured even by one man. CONSTITUTION:A first probe piece equipped with an outside and inside measuring jaws 35 and 36 is fitted to the measuring member pulling-out port of a main body case 11 and, at the same time, a second probe piece 22 equipped with an outer and inner measuring jaws 25 and 26 is fitted to the front end of the member 21. By using these jaws, any inside dimensions (inside diameters of holes, widths of grooves, etc.), outside dimensions (outside diameters, of shafts, widths of projections, etc.) and lengths of pieces of cloth, etc., can be easily and accurately measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital display type tape measure for digitally displaying a length measurement dimension. In particular,
Digital display type that can easily measure the inner dimension (for example, the inner diameter of a hole or the width of a groove) or the outer dimension (for example, the outer diameter of a shaft or the width of a protrusion) of an object to be measured. Regarding tape measure.

[0002]

BACKGROUND ART A digital display type tape measure that digitally displays a length measurement dimension is a take-up reel that winds a scale material in a case so that the scale material can be pulled out, and a sprocket wheel that rotates in association with the pulling out of the scale material. Is provided, and the rotation amount of this sprocket wheel is detected by an encoder or the like, and the rotation amount, that is, the pull-out amount of the scale material is digitally displayed on a digital display.

In the measurement, the tip of the scale should be brought into contact with one end of the measurement site of the object to be measured with one hand, and then moved to the other end of the measurement site while holding the case with the other hand. For example, the scale is pulled out from the case. Then,
Since the sprocket wheel rotates in relation to the withdrawal of the bar, the amount of the bar withdrawn is digitally displayed on the digital display. Eventually, if you move the case to a position where the scale material withdrawal port of the case matches the other end side of the measurement site, the amount of scale material withdrawn corresponding to the length dimension of the measurement site of the DUT will be displayed on the digital display. Because it is displayed digitally,
By simply reading the displayed value, the length dimension of the measurement site can be definitely and easily measured.

[0004]

However, in the conventional tape measure structure, the tip of the scale member is brought into contact with one end of the measurement site of the object to be measured with one hand, and then the case is held with the other hand. Since the measurement part is moved to the other end side, the maximum measurable length by one measurer is limited to about 2 m, which is the maximum size when the measurer opens both hands. Therefore, if you move one hand whose tip side of the scale is in contact with the object to be measured along the scale in relation to the movement of the case, the maximum measurable length by one measurer can be expanded. But you can
When the one hand is moved along the scale, the scale may be displaced with respect to the object to be measured, so that a measurement error is likely to occur.

Further, in the conventional tape measure structure, when the inner diameter of the hole is to be measured, the tip of the measuring material is positioned on one side of the hole with one hand, and the measuring material is used to measure the center of the measuring material. Since the method of positioning the case on the opposite side of the hole so as to pass through it, accurate inner diameter measurement cannot be expected. In particular, in order to measure the center-to-center dimension between holes, the method of positioning the tip of the scale and the scale outlet of the case at the center of the hole is used as a measure of the operator, so accurate measurement is extremely accurate. It wasn't what I expected.

Further, with the conventional tape measure structure, the outer diameter of the shaft cannot be directly measured. In order to measure, it is necessary to wind a scale material around the outer peripheral surface of the shaft and calculate the shaft diameter from the length dimension (peripheral length dimension) of the outer peripheral surface, so accurate measurement cannot be expected. However, it has the drawback of being time consuming and laborious.

By the way, a caliper is usually used to measure the inner diameter of the hole and the outer diameter of the shaft. However, in the case of a caliper, the larger size makes the weight heavier, which makes it difficult for one person to work and is expensive. Therefore, when the inner diameter dimension and the outer diameter dimension are long, one person cannot perform the measurement work, so that the work efficiency is poor and stable measurement cannot be expected.

The object of the present invention is to solve the above-mentioned drawbacks of the prior art and to easily and accurately measure various items of a long workpiece even by one person. To provide a tape measure. Another object of the present invention is to provide a digital display tape measure that can be used as an existing tape measure in addition to the above objects.

[0009]

A digital display type tape measure of the present invention includes a main body case, a scale material provided in the main body case such that the scale material can be pulled out and wound, and detection for detecting the amount of pullout of the scale material. Means, a digital display for digitally displaying the amount of withdrawal detected by the detection means, a switch means having a zero set switch and a hold switch, and a display value of the digital display when the zero set switch is operated. 0, display control means for holding the display value of the digital display when the hold switch is operated, and abutting in the vicinity of the scale material drawing port of the main body case orthogonal to the pulling direction of the scale material. A first tracing stylus piece having a surface is provided, and the first measuring piece is orthogonal to the drawing-out direction of the scale member on the tip end side of the scale member and
The second tracing stylus piece having an abutting surface facing the abutting surface of the tracing stylus piece is provided.

In the digital display type tape measure,
The first and second tracing stylus pieces are outer measuring jaws that have a contact surface that projects toward one side in the width direction of the scale material and that has an abutting surface orthogonal to the drawing direction of the scale material on the inner surfaces that face each other. It may be configured such that each has an inner measuring jaw that projects toward the other side in the width direction of the scale member and has an abutting surface orthogonal to the drawing direction of the scale member on the outer surface opposite to the inner surface facing each other. .

In the digital display type tape measure,
In the first and second tracing stylus pieces, inner surfaces facing each other are formed as contact surfaces orthogonal to the drawing direction of the scale material, and outer surfaces opposite to the inner surfaces facing each other are conical in the axial direction. It may be formed on a conical outer peripheral surface divided into two parts.

In the digital display type tape measure,
The first tracing stylus piece may be provided so as to be drawn out in the drawing direction of the scale material and fixable at an arbitrary position. Further, in the digital display type tape measure, the first measuring element piece may be detachably attached to the main body case, and the second measuring element piece may be detachably attached to the measuring material. Here, the main body case may include a reference plate that can be drawn out along the drawing direction of the scale, and the first tracing stylus piece may be detachably attached to the reference plate. Further, the first measuring element piece may be provided with a fixing means for fixing the scale member at an arbitrary position in the pulling-out direction, and the first measuring element piece may have the reference plate as the reference plate. The fixing means is attached to mounting plates that are arranged so as to be opposed to each other with the sandwiching member sandwiched therebetween, and the sandwiching member that sandwiches the scale material between the mounting plate and the pressing member that presses the sandwiching member toward the mounting plate. It may be configured to include.

[0013]

In the measurement, first, the contact surface of the first probe piece is brought into contact with the contact surface of the second probe piece, and then the zero set switch is operated, and the display value on the digital display is changed. It is cleared to 0. After that, when the scale material is pulled out from the main body case, the amount of the scale material pulled out from the contact surface of the first probe piece is digitally displayed on the digital display. Therefore, when the contact surface of each contact piece is brought into contact with the measurement site of the object to be measured and then the hold switch is operated, the display value on the digital display is held, so that even one person can handle a long object. It is possible to easily and accurately measure the dimension between the measurement sites of the measurement object.

Further, when the first and second measuring element pieces have a structure having an outer measuring jaw and an inner measuring jaw, the inner dimension of the object to be measured (for example, the inner diameter dimension of the hole or the width of the groove). Dimensions) and outer dimensions (for example, the outer diameter dimension of the shaft and the width dimension of the protrusion) can be easily and accurately measured.

In the first and second tracing stylus pieces, inner surfaces facing each other are formed as contact surfaces orthogonal to the drawing direction of the scale, and outer surfaces opposite to the inner surfaces facing each other. If the structure is formed on a conical outer peripheral surface obtained by dividing the cone into two in the axial direction, in addition to the outer dimension of the object to be measured, the dimension from the end surface of the object to the center of the hole and the hole to hole The center-to-center dimension can be measured easily and accurately.

If the first tracing stylus piece is provided so that it can be drawn out in the drawing direction of the scale and can be fixed at any position, the first tracing stylus piece can be drawn out to any position. The measurement can be performed without the body case interfering with the object to be measured. Further, if the structure is such that the first measuring element piece is detachably attached to the main body case and the second measuring element piece is detachably attached to the scale member, these measuring element pieces are removed. It can be used as an existing tape measure. Here, there is a type of existing tape measure that includes a reference plate that can be drawn out in the main body case along the drawing direction of the scale material, and in this type of tape measure, this reference plate is provided with the first plate. Removably attach the contact piece. Further, if the fixing means for fixing the scale material at an arbitrary position in the drawing direction is provided on the first tracing stylus piece, the scale material can be mechanically held at a predetermined length. Further, a holding member that attaches the first tracing stylus piece to a mounting plate that is arranged to face each other with the reference plate sandwiched therebetween, and that the fixing means sandwiches the scale member with the mounting plate; If it is configured to include a pressing member that presses the holding member toward the mounting plate,
The fixing means can be easily attached to the first measurement piece.

[0017]

The preferred embodiments of the digital display type tape measure of the present invention will be described below in detail with reference to the accompanying drawings. 1st Example 1st Example is shown in FIGS. In FIG. 1, a main body case 11 is provided with a digital display 12 on the upper surface thereof, and a scale material outlet 13 is provided on one end surface thereof.
A power source on / off switch SW _{1, a} zero set switch SW _{2, and a} data transmission / hold switch SW ₃ are provided on the front face portion, respectively. Further, as shown in FIGS. 2 and 3, a finger hooking ridge 14 is integrally formed horizontally on the back surface of the main body case 11 at a position slightly above the lower surface.
This means that even in a state where the body case 11 is grasped from above by one hand, an operator whose fingers do not reach the lower surface of the body case 11, for example, a female operator, can use the finger to project the ridge 1.
This is to ensure that the main body case 11 can be securely gripped by being hooked on the base plate 4.

As shown in FIGS. 4 and 5, a circuit board 15 is housed inside the main body case 11, and a take-up reel 16 and a sprocket 17 are provided.
Are provided adjacently and rotatably. Two guide rollers 18 and 19 are provided in the vicinity of the sprocket 17, and an arcuately curved guide plate 20 is attached with a certain gap. The strip-shaped steel scale material 21 is drawn out to the take-up reel 16,
It is wound so that it can be wound up. The tip of the bar 21 is
It is guided by the two guide rollers 18 and 19 and is drawn out from the scale material drawing opening 13 of the main body case 11 through the gap between the guide plate 19 and the sprocket 17. The take-up reel 16 is the scale material 2.
1 is always urged to rotate by a spring (not shown) in a winding direction.

Further, a first tracing stylus piece 31 is provided in the scale material drawing-out port 13 of the main body case 11 so as to be drawn out in the drawing-out direction of the scale material 21 and fixed by a bolt 32 at an arbitrary position. There is. In the first tracing stylus piece 31,
A slip stopper 33 in which a plurality of protrusions are arranged at a constant pitch is formed on the surface exposed from the lower surface of the main body case 11, and the width of the scale 21 is extended to the outside from the scale outlet 13. An outside measuring jaw 35 protruding toward one side in the direction, an inside measuring jaw 36 protruding toward the other side in the width direction of the scale 21, and a guide protrusion 37 for guiding both sides of the scale 21 are provided. Has been.

Further, the first member is attached to the tip of the scale member 21.
The second tracing stylus piece 22 that is brought into contact with the measurement site of the object to be measured is attached together with the tracing stylus piece 31. The second measuring piece 22 has an outer measuring jaw 25 protruding toward one side in the width direction of the scale member 21 and an inner measuring jaw 26 protruding toward the other side in the width direction of the scale member 21. And are provided respectively. Each outer measuring jaw 35,
Abutting surfaces 35A, 2 orthogonal to the drawing direction of the scale 21 and capable of abutting on each other are provided on the inner surfaces of 25 facing each other.
5A is formed. Each inner measuring jaw 36, 26
On the outer surface opposite to the inner surface facing each other, contact surfaces 36A, 26A are formed which are orthogonal to the drawing direction of the scale material 21 and can be matched with each other.

Scales 23 are formed on both edges of the scale member 21 in the width direction, and guide holes 24 are formed in the center in the longitudinal direction. The guide holes 24 are sized so that they can be engaged with the protrusions of the sprocket 17, and are formed at regular intervals along the longitudinal direction. Therefore,
When the scale member 21 is pulled out or wound up, the sprocket 17 is accurately rotated by an angle corresponding to the pulled-out amount or the wound-up amount without slipping. A rotor 28 (see FIG. 5) is integrally provided on the shaft 27 of the sprocket 17, and an electrostatic capacitance type detection means 29 for electrically detecting the rotation amount of the rotor 28 is provided on the circuit board 15 and It is formed across the rotor 28. As shown in FIG. 6, the detection means 29 includes a capacitance type encoder 29A that generates a number of pulses proportional to the amount of rotation of the rotor, and a counter 29B that counts the pulses from this encoder.

Incidentally, as the electrostatic capacity type encoder 29A, the receiving electrodes arranged on the rotor 28 at a constant angle pitch, and the reception electrodes arranged on the circuit board 15 at a constant angle pitch along the rotation direction of the rotor 28 are used. A plurality of sets of transmitting electrodes, each of which corresponds to one pitch of the electrodes
The detection electrodes are arranged on the circuit board 15 along the rotation direction of the rotor 28 and have a length that extends over several reception electrodes, and the transmission electrode elements forming one set are divided into 8 parts of 360 ° and have different phases. In addition to an encoder configured to include a transmission circuit that sequentially applies signals and a reception circuit that receives a signal from a detection electrode whose phase changes based on the relative rotation between the reception electrode and the transmission electrode, other known devices are used. Can be used.

FIG. 6 shows a circuit configuration provided on the circuit board 15. In the figure, reference numeral 41 is a CPU. The CPU 41 is provided with the various switch groups S which constitute a switch means through the address / data bus 42 and the like.
W, the detection means 29, and the RO storing the processing program
M43 and RAM that stores measurement data and calculation results
44, the digital display 12, and a transmitter 45 for transmitting length measurement data, calculation results, etc. to an external central processing unit or the like.

Next, the operation of this embodiment will be described. In the measurement, first, attach the first tracing stylus piece 31 to the main body case 11
After pulling out to an arbitrary position, the bolt 32 is tightened to fix the first probe 31 to the main body case 11. Here, the contact surfaces 35A of the outer jaws 35, 25 for both outer sides,
After making 25A contact each other, zero set switch S
When W ₂ is operated, the display value on the digital display 12 is cleared to 0. After this, when the scale material 21 is pulled out,
The amount of pulling out of the scale member 21 from the first tracing stylus piece 31, that is, the contact surfaces 35A, 2 of the outer measuring jaws 35, 25.
Dimension between 5A, contact surface 3 of inner measuring jaws 36, 26
The dimension between 6A and 26A is digitally displayed on the digital display 12.

Therefore, in order to measure the outer diameter of the shaft, as shown in FIG. 7, the contact surface 3 of the outer measuring jaws 35 and 25 is measured.
When the hold switch SW ₃ is operated after the outer peripheral surface of the shaft 101 is sandwiched by 5A and 25A, the value of the detection means 29 is transmitted to the outside through the transmitter 45 (this transmission is performed by operating the switch SW _3). Therefore, it will be omitted in the following description), the digital display 12
Since the displayed value of is held, the outer diameter dimension D ₁ of the shaft 101 can be measured by reading the displayed value.

Further, in order to measure the inner diameter of the hole, FIG.
As shown in FIG.
When A and 26A are brought into contact with the inner wall of the hole 102 and then the hold switch SW ₃ is operated, the display value of the digital display 12 is held. Therefore, if the display value is read, the inner diameter dimension D ₂ of the hole 102 can be determined. Can be measured. Further, in order to measure the length dimension of the cloth or the like, as shown in FIG. 9, the contact surfaces 35A, 25 of the outer measuring jaws 35, 25 are
When the hold switch SW ₃ is operated after A is positioned on the measurement portion of the cloth 103, the display value of the digital display 12 is held.
The length dimension L ₁ of 03 can be measured.

Therefore, according to the first embodiment, the first gauge head piece 31 having the outer measuring jaw 35 and the inner measuring jaw 36 is attached to the scale material outlet 13 of the main body case 11, and the scale material 21 is also attached. Since the second measuring element piece 22 having the outer measuring jaw 25 and the inner measuring jaw 26 is attached to the tip of the, the inside dimension (for example, the inside diameter dimension of the hole or the groove Width dimension) and outer dimension (for example, shaft outer diameter dimension and protrusion width dimension)
Can be measured easily and accurately. Furthermore, the length dimension of the cloth 103 can be measured easily and accurately.

Further, since the first tracing stylus piece 31 is provided so as to be able to be drawn out in the drawing direction of the scale member 21 and fixed at any position, the first tracing stylus piece 31 can be drawn out to any position. Therefore, the measurement can be performed in a state where the main body case 11 does not interfere with the measured object.

Second Embodiment A second embodiment is shown in FIGS. In the description of these drawings, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified. The digital display type tape measure of this embodiment is the same as that of the first embodiment except that the shapes of the first and second tracing stylus pieces are different, as shown in FIG. Measuring piece 13 of this embodiment
1, 122 are formed on the contact surfaces 131A, 122A whose inner surfaces facing each other are orthogonal to the drawing direction of the scale 21, and the outer surface opposite to the inner surfaces facing each other divides the cone into two in the axial direction. Conical outer peripheral surfaces 131B, 122B
Is formed in. That is, the cone is divided into two with its axis as the center, and each divided piece is divided into the first and second tracing stylus pieces 13.
1, 122 is attached.

Therefore, according to the second embodiment, the contact surface 13
1A and 122A can be used to easily and accurately measure the outer dimension of the object to be measured, and as shown in FIG. 11, the contact surface 122A is brought into contact with the end surface 104 of the object to be measured. When the measurement piece 131 of No. 1 is inserted into the hole 105, the dimension L ₂ from the end surface 104 of the object to be measured to the center of the hole 105 can be easily and accurately measured. In addition, as shown in FIG.
If the measurement pieces 131 and 122 are inserted in the holes 6 and 107, the dimension p between the centers of the holes 106 and 107 can be measured easily and accurately.

Third Embodiment A third embodiment is shown in FIGS. In the description of these drawings, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified. As shown in FIGS. 13 and 14, the digital display tape measure of the present embodiment is different in that the structure of the main body case, the shapes of the first and second tracing stylus pieces, and the structure for attaching them to the main body case are different. The same as in the first embodiment. FIG.
14 and FIG. 14, the main body case 111 of the present embodiment.
Is a structure provided with a reference plate 112 that can be drawn out from the scale material drawing port 13 in the drawing direction of the scale material 21, and the reference plate 112 can be fixed at any position by the bolt 32 (see FIG. 4). Further, a slip stopper 33 (see FIG. 4) in which a plurality of protrusions are arranged at a constant pitch is formed on the surface exposed from the lower surface of the main body case 111. The reference plate 112 is provided on an existing tape measure for auxiliary use in measurement, and in use, the tip surface and the scale member 21 are used.
The object to be measured is sandwiched between the L-shaped locking piece 121 provided at the tip of the. In addition, the main body case 11 of the present embodiment
The main configuration other than 1 is the same as that of the first embodiment shown in FIGS. 1 to 6.

In the first tracing stylus piece 231 of this embodiment, the outer measuring jaw 35 is formed on one side, the inner measuring jaw 36 is formed on the other side, and further, the reference plate is formed in the central portion. A recess 231A for housing 112 is formed. A mounting plate 232 is disposed so as to face the first gauge head piece 231 with the reference plate 112 interposed therebetween, and the mounting plate 232 and the first gauge head piece 23 are disposed.
1 and 2 are attached to each other by screws 233. The first tracing stylus piece 231 is provided with a fixing means 200 for fixing the scale material 21 at an arbitrary position in the drawing direction. The structure of this fixing means 200 is shown in FIG. In FIG. 15, the fixing means 200 includes a plate-shaped holding member 201 that holds the scale member 21 between it and the mounting plate 232, and a pressing means that presses the holding member 201 toward the mounting plate. Book mounting screw 20
2 and is configured so that the pressing force of the holding member 201 toward the mounting plate can be adjusted by adjusting the screwing amount of these mounting screws 202. A coil spring (not shown) that strengthens the pressing force may be interposed between the head of the mounting screw 202 and the holding member 201, if necessary.

As shown in FIGS. 13 and 14, the second measuring piece 222 of this embodiment has the outer measuring jaw 25 formed on one side and the inner measuring jaw 26 formed on the other side. ing. A mounting plate 223 is arranged to face the second tracing stylus piece 222 with the tip end of the scale member 21 interposed therebetween, and the mounting plate 223 and the second tracing stylus piece 222 are mounted by screws 224. ing.

In order to assemble the digital display type tape measure of the third embodiment, the first and second gauge head pieces 231 and 222 are attached to the existing tape measure having the reference plate 112.
Therefore, first, from the main body case 111 to the reference plate 1
After pulling out 12, the bolt 32 is tightened to fix the reference plate 112 to the main body case 111. Further, the first tracing stylus piece 231 is attached to the reference plate 112 by the attachment plate 232 and the screw 233, and the fixing means 200 is attached to the attachment plate 232. Further, the second tracing stylus piece 222 is attached to the tip of the scale member 21 by the attachment plate 223 and the screw 224. When using this digital display type tape measure, it may be desired to hold the scale member 21 at a predetermined length. In that case, the screwing amount of the mounting screw 202 of the fixing means 200 is increased and the clamp member 201 is used to measure the scale member 21. Mounting plate 232 with great force
Press on. The scale member 21 is sandwiched and fixed between the sandwiching member 201 and the mounting plate 232. To release this fixing, the screwing amount of the mounting screw 202 may be reduced. The operation method of the digital display type tape measure of the third embodiment is the same as that of the digital display type tape measure of the first embodiment. For example, when holding the scale member 21 for a predetermined length, the display value of the digital display 12 is held by operating the hold switch SW ₃ .

Therefore, according to the third embodiment, in addition to the same effects as the first embodiment, the following effects can be obtained. That is, in the third embodiment, the first measuring element piece 231 is detachably attached to the main body case 111, and the second measuring element piece 222 is detachably attached to the scale member 21. Child piece 231,22
By removing 2, it can be used as an existing tape measure. Further, in the third embodiment, since the first tracing stylus piece 231 is detachably attached to the reference plate 112 provided in advance in the body case 111, the first tracing stylus piece 2
The 31 can be securely attached to the main body case 111.
Further, fixing means 200 for fixing the scale member 21 at an arbitrary position in the pulling-out direction is provided on the first tracing stylus piece 231, so that the scale member 21 can be mechanically held at a predetermined length like a caliper. Since it is set, the measurement work becomes easy.
In addition, the fixing means 200 is attached to the mounting plate 232.
Since the holding member 201 that holds the scale member 21 between the holding member 201 and the mounting member 202 is a pressing unit that presses the holding member 201 toward the mounting plate 232 side, the scale member has a simple structure. 21 can be fixed.

Fourth Embodiment A fourth embodiment is shown in FIG. In the description of this drawing, the same constituents as those in the third embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified. The digital display type tape measure of this embodiment is the same as that of the third embodiment except that the shapes of the first and second tracing stylus pieces are different, as shown in FIG. In the first and second tracing stylus pieces 331 and 322 of the present embodiment, inner surfaces facing each other are formed on contact surfaces 331A and 322A orthogonal to the drawing direction of the scale member 21, and inner surfaces facing each other. The outer surface opposite to the outer surface is a conical outer peripheral surface 331B, 32 in which the cone is divided into two in the axial direction.
2B is formed. That is, the cone is divided into two with its axis as the center, and each divided piece is divided into the first and second tracing stylus pieces 3.
It is a configuration attached to 31, 322. The first tracing stylus piece 331 is removably attached to the reference plate 112, and the second tracing stylus piece 331 is detachably attached to the tip portion of the scale member 21. Therefore, according to the fourth embodiment, in addition to the same effect as the third embodiment, the effect of the second embodiment can also be obtained.

Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to this embodiment, and various improvements and design changes can be made without departing from the gist of the present invention. It is possible. For example, the configuration of the scale member 21 is not limited to the strip shape described in the above embodiment, and may be a string shape. Further, as the configuration of the detection means 29,
It is not limited to the capacitance type described in the above embodiment, but may be a photoelectric type or the like.

Further, in the third and fourth embodiments,
The first tracing stylus pieces 231 and 331 are attached to the reference plate 11
1 is detachably attached to
1,331 may be attached to the lower surface of the main body case 111 with a bolt or the like. Further, it is not always necessary to provide the fixing means 200 on the first tracing stylus piece 231. Even if the fixing means 200 is provided, the configuration is not limited to the configurations of the third and fourth embodiments, and for example, the protrusions that can be engaged with the guide holes 24 of the scale member 21 are sandwiched. It may be a structure provided on the member.

[0039]

As described above, according to the digital display type tape measure of the present invention, it is possible to easily and accurately measure various items of a long measurement object even by one person. You can If the first and second tracing stylus pieces have a structure having an outer measuring jaw and an inner measuring jaw, the inner dimension of the object to be measured (for example, the inner diameter dimension of the hole or the width dimension of the groove). The outer dimension (for example, the outer diameter dimension of the shaft and the width dimension of the protrusion) can be easily and accurately measured. Further, if the first tracing stylus piece is provided so that it can be drawn out in the drawing direction of the scale and can be fixed at any position, the first tracing stylus piece can be drawn out to any position, so that the main body case The measurement can be performed without interfering with the object to be measured. Further, the first and second tracing stylus pieces are formed on contact surfaces whose inner surfaces facing each other are orthogonal to the drawing direction of the scale, and whose outer surfaces opposite to the inner surfaces facing each other form a cone. If it is formed on the conical outer peripheral surface divided into two in the axial direction, the outer dimension of the object to be measured can be easily and accurately measured using the contact surface.

Further, when the first measuring element piece is detachably attached to the main body case and the second measuring element piece is detachably attached to the scale member, by removing these measuring element pieces, It can also be used as an existing tape measure. In addition, the first plate is attached to a reference plate which is provided in advance on the body case.
If the measuring element piece is detachably attached, the first measuring element piece can be reliably attached to the main body case. Further, if the first measuring element piece is provided with a fixing means for fixing the scale member at an arbitrary position in the pulling direction, the scale member can be mechanically held at a predetermined length like a caliper. Work becomes easy. Further, if the fixing means is configured to include a sandwiching member that sandwiches the scale member between the mounting plate and a pressing unit that presses the sandwiching member toward the mounting plate, the scale has a simple structure. The material can be fixed.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the main body case of the embodiment as viewed from the back side.

FIG. 3 is a side view of the main body case of the above embodiment.

FIG. 4 is a vertical cross-sectional view of the main body case of the above embodiment.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a block diagram showing a circuit configuration of the above embodiment.

FIG. 7 is a diagram showing a state at the time of measuring an outer diameter dimension in the same example.

FIG. 8 is a diagram showing a state at the time of measuring the inner diameter dimension in the same example.

FIG. 9 is a view showing a manner of measuring the length dimension of the cloth in the above Example.

FIG. 10 is an external perspective view showing a part of the second embodiment of the present invention.

FIG. 11 is a diagram showing how dimensions are measured from the end surface of the object to be measured to the center of the hole in the above-mentioned Example.

FIG. 12 is a diagram showing the manner of measuring the dimension between the hole centers of the object to be measured in the above Example.

FIG. 13 is an external perspective view showing a third embodiment of the present invention.

FIG. 14 is an exploded perspective view of a main part of the above embodiment.

FIG. 15 is a sectional view taken along line XV-XV in FIG.

FIG. 16 is an external perspective view showing a fourth embodiment of the present invention.

[Explanation of symbols]

11,111 Main body case 12 Digital display 21 Scale member 22,122,222,322 Second measuring piece 31,131,231,331 First measuring piece 25,35 Outside measuring jaw 25A, 35A Abutting surface 26,36 Inside measuring jaw 26A, 36A Abutting surface 29 detection means 41 CPU (display control means) 112 reference plate 122A, 131A, 322A, 331A abutting surface 122B, 131B, 322B, 331B conical outer peripheral surface 200 fixing means 201 clamping member 202 mounting screw 232 mounting plate SW switch group (switch means) SW ₂ Zero set switch SW ₃ Data transmission / hold switch (hold switch)

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area G01B 21/16

Claims (8)

[Claims] 1. A main body case, a scale material that can be drawn out and wound around the main body case, detection means for detecting the amount of the scale material drawn out, and the amount of pull-out detected by the detection means. A digital display for digital display, a switch means having a zero set switch and a hold switch, and a display value of the digital display set to 0 when the zero set switch is operated, and a digital display when the hold switch is operated. And a display control means for holding the display value of the display, and a first gauge head piece having a contact surface orthogonal to the drawing direction of the scale is provided in the vicinity of the scale drawing outlet of the main body case, A second contact surface on the tip end side of the scale member, the contact surface being orthogonal to the drawing direction of the scale member and facing the contact surface of the first tracing stylus piece;
The digital display type tape measure, which is provided with the measuring element piece. 2. The digital display tape measure according to claim 1, wherein the first and second tracing stylus pieces project toward one side in the width direction of the scale material, and the scale material is drawn out to the inner surfaces facing each other. An outer measuring jaw having an abutment surface orthogonal to the direction and an outer surface opposite to the inner surface projecting toward the other side in the width direction of the scale material and facing each other are orthogonal to the drawing direction of the scale material. A digital display tape measure, each having an inner measuring jaw having an abutting surface. 3. The digital display tape measure according to claim 1, wherein the first and second tracing stylus pieces have inner surfaces facing each other formed on a contact surface orthogonal to a drawing direction of the scale material. Further, the outer surface opposite to the inner surface facing each other is formed as a conical outer peripheral surface obtained by dividing the cone into two in the axial direction.
A digital display type tape measure characterized in that. 4. The digital display tape measure according to claim 1, wherein the first tracing stylus piece is provided so as to be drawn out in the drawing direction of the scale material and fixed at an arbitrary position. A digital display type tape measure that is characterized by 5. The digital display tape measure according to claim 1, wherein the first measuring element piece is detachably attached to the main body case, and the second measuring element piece is the ruler. A digital display tape measure that is detachably attached to a material. 6. The digital display tape measure according to claim 5, wherein the main body case includes a reference plate that can be drawn out along the drawing direction of the scale material, and the reference plate is provided with the first measuring element. Digital display type tape measure, characterized in that one piece is detachably attached. 7. The digital display tape measure according to claim 6, wherein the first tracing stylus piece is provided with a fixing means for fixing the scale material at an arbitrary position in the drawing direction.
A digital display type tape measure characterized in that. 8. The digital display type tape measure according to claim 7, wherein the first tracing stylus piece is attached to mounting plates that are arranged to face each other with the reference plate interposed therebetween, and the fixing means includes the mounting means. A digital display type tape measure, comprising: a sandwiching member that sandwiches the scale member between the plate and a pressing unit that presses the sandwiching member toward the mounting plate.