JP2006145491A - Measuring system of diameter of steel wire rope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring system of the diameter of a wire rope that can always accurately measure, without generating variations in the measured values due to individual differences and measuring the positions of workers, by efficiently measuring the diameter of a circumscribed circle of the wire rope with a plurality of twisted strands. <P>SOLUTION: The system for measuring the diameter d of the circumscribed circle G of the wire rope 13, twisted by the plurality of the strands S comprises a guide member 12 providing a fixing side measuring jaw 11 on one end, a moving-side measuring jaw 14 provided movably in the longitudinal direction of the guide member 12, a measuring means 15 for measuring the moving displacement amount of the moving-side measuring jaw 14 to the guide member 12, and a biasing means 45 for biasing the moving-side measuring jaw 14 to a side separated from the fixed-side measuring jaw 11. Paired grasping faces 16 and 17, formed by spacing a parallel interval on each of the fixing side measuring jaw 11 and the moving side measuring jaw 14, are made to abut against the wire rope 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a wire rope diameter measuring device that measures the diameter of a circumscribed circle of a wire rope carried by a person and used in a crane or an elevator.

Conventionally, steel cords (hereinafter referred to as wire ropes) used for cranes (including special cranes) or elevators are used for transporting heavy objects as an important component of the hoisting device, and the strength maintenance is most important. is important. Usually, the wire rope is combined with a pulley (sheave) due to its lifting ability, and 2 to 10 wire ropes are folded back, one end being fixed to the wire drum and the other end being fixed to the lifting tool. However, every time it is rolled up or down, it repeatedly receives bending stress through the sheave, and wear is promoted by metal contact or inclusions. Therefore, it is necessary to replace it with a fixed life (legal regulation). For example, in the safety regulations for cranes etc. (Article 215, Paragraph 2), any wire with a decrease in diameter exceeding 7% of the nominal diameter is an ineligible wire rope and its use is prohibited. Usually, the wire rope wears out and the wire breakage is a mechanism of breakage. Therefore, the measurement is periodically performed according to the related rules, and the measured value is stored to manage the trend.

As one of devices for measuring the diameter of a wire rope, for example, a device described in Patent Document 1 configured to reduce the load on an operator is known. In the apparatus described in Patent Document 1, a rotating body composed of a pair of sheaves sandwiching a wire rope to be measured is provided on both sides in a direction perpendicular to the axis of the wire rope. By measuring, the diameter can be continuously measured.

Further, as another apparatus for measuring the diameter of the wire rope, there is a commercially available caliper 70 as shown in FIGS. 4A and 4B, and the operator directly holds the caliper 70 with the outer measuring jaw 72. , 73 with the wire rope 71 being sandwiched. The wire rope 71 is formed by twisting a plurality of strands (also called strands) formed by twisting a plurality of strands, and therefore the strand is inclined with respect to the axial direction of the wire rope 71. In addition, peaks and valleys are alternately formed on the outer peripheral portion of the cross section by the adjacent strands twisted together. Here, the wire rope 71 is a 7-wire 6-strand wire. In addition, as a method for measuring the diameter of the wire rope, a method of measuring the diameter of a circumscribed circle in two or more cross-section directions at an arbitrary point separated from the end of the wire rope by a vernier caliper and obtaining an average value thereof. It is common.

JP-A-10-19549 (FIGS. 1 to 3)

However, the conventional apparatus for measuring the diameter of the wire rope still has the following problems to be solved.
In the apparatus described in Patent Document 1, it is necessary to perform an operation of sandwiching a wire rope between a pair of rotating bodies each time measurement is performed, and labor is required for the preparation and the installation and removal operations after the measurement is completed. Furthermore, when the nominal diameters of the wire ropes are different, there is a problem that the wire rope cannot be clamped without sliding with a sheave having a groove having a constant diameter and a constant shape, resulting in a measurement error.
As shown in FIGS. 4A and 4B, when the diameter (nominal diameter) d of the wire rope 71 is measured with a caliper 70, peaks and valleys are alternately formed on the outer peripheral portion by adjacent strands twisted together. Since the width in the axial direction of the wire rope 71 of the outer side measuring jaws 72, 73 to which the caliper 70 contacts and separates is smaller than the pitch between the peaks and valleys, the clamping surface 74, There are problems that the measured value varies depending on the axial contact position of the wire rope 71 at the outer peripheral portion of the wire rope 71 with respect to 75, and that the measured value varies due to individual differences among workers. That is, the measurement object of the commercially available caliper 70 is usually suitable for measurement with a circular cross-sectional outer shape, and, like the wire rope 71, peaks and valleys are alternately formed on the outer peripheral portion by adjacent strands twisted together. When the cross-section was irregularly shaped, the diameter of the circumscribed circle could not be measured accurately. 4A shows a case where the diameter d of the circumscribed circle G is not accurately measured, and FIG. 4B shows a case where the diameter d of the circumscribed circle G is accurately measured.

The present invention has been made in view of such circumstances, and can efficiently measure the diameter of a circumscribed circle of a wire rope formed by twisting a plurality of strands, and the measurement value varies depending on individual differences and measurement positions of workers. An object of the present invention is to provide a wire rope diameter measuring device that can always measure accurately.

A wire rope diameter measuring device according to the present invention that meets the above-mentioned object is a device that measures the diameter of a circumscribed circle of a wire rope in which a plurality of strands are twisted together, and a guide having a fixed-side measuring jaw at one end. A movable jaw that is movable in the longitudinal direction of the guide member, a measuring unit that measures a displacement amount of the movable jaw relative to the guide member, and the movable jaw is fixed. A biasing member that biases the side measuring jaw away from the side measuring jaw, and a pair of gripping surfaces formed on the fixed side measuring jaw and the moving side measuring jaw at a parallel interval are provided on the wire rope. It is comprised so that it may contact | abut.

In the wire rope diameter measuring apparatus according to the present invention, the fixed-side measuring jaw provided at one end of the guide member and the moving-side measuring jaw moving in the longitudinal direction of the guide member are formed at a parallel interval. The pair of gripping surfaces can be moved to the position where the diameter of the circumscribed circle of the wire rope is measured by simply gripping the wire rope in which a plurality of strands are twisted together. Distance, that is, the diameter of the circumscribed circle of the wire rope can be measured by the measuring means for measuring the moving displacement of the moving side measuring jaw with respect to the guide member. The value does not fluctuate and can always be measured accurately, and the configuration of the apparatus is simple and can be carried around like a tool. Moreover, since the moving side measuring jaw is urged away from the fixed side measuring jaw, the operator moves the moving side measuring jaw against the urging force, and the wire rope is moved to the pair of gripping surfaces. The measurement workability is improved because it is not necessary to separate the moving side measuring jaw from the fixed side measuring jaw.

The fixed finger and the movable jaw are each provided with a first finger-holding portion on which one of the thumbs of one hand and a finger other than the thumb can be hooked, and a second finger-holding on which the other can be hooked Since the measurement operator can hold and move the fixed-side measurement jaw and the moving-side measurement jaw with one hand, for example, the operator performs measurement like a wire rope of a crane. Even if the posture is bad, the measurement operation can be easily performed.
If the length of the wire rope in the axial direction of the gripping surface is more than twice the diameter of the circumscribed circle of the wire rope to be measured, measurement errors due to the thread of the metal wire can be eliminated. Therefore, the measurement accuracy can be improved.

Either one or both of the fixed side measuring jaw and the moving side measuring jaw is provided with a back receiving member having a guide surface that is in contact with the outer peripheral portion of the gripped wire rope and orthogonal to the paired gripping surface. In this case, since the outer periphery of the wire rope comes into contact with the guide surface of the back receiving member, the wire rope can be easily gripped without being inclined, and the measurement work can be performed efficiently.
When the measurement unit is provided with a display unit that displays the measured value, the wire rope diameter measurement process is performed by reading or recording the measured value displayed on the display unit after gripping the wire rope. Therefore, it is possible to accurately estimate the aging and replacement time of the wire rope.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a front view of a wire rope diameter measuring device according to an embodiment of the present invention, FIG. 2 is a plan view of the wire rope diameter measuring device, and FIG. 3 is a diagram of the wire rope diameter measuring device. It is a side view.

As shown in FIG. 1 to FIG. 3, a wire rope diameter measuring device 10 according to an embodiment of the present invention includes a guide member 12 having a fixed-side measuring jaw 11 provided at one end thereof, and the length of the guide member 12. An example of a measuring unit that is provided so as to be movable in the direction and grips the wire rope 13 with the fixed measuring jaw 11 and a measuring means for measuring the moving displacement of the moving measuring jaw 14 relative to the guide member 12. And a coil spring 45 that is an example of a biasing member that biases the moving-side measuring jaw 14 toward the side away from the fixed-side measuring jaw 11. .

Moreover, the fixed side measuring jaw 11 and the moving side measuring jaw 14 are respectively provided with gripping surfaces 16 and 17, and the paired gripping surfaces 16 and 17 formed with a parallel interval L are provided on the wire rope 13. This is a device that measures the diameter d of the circumscribed circle G of the wire rope 13 by gripping the wire rope 13 in which a plurality of (six in this embodiment) strands S are in contact with each other. Hereinafter, these will be described in detail.

The wire rope diameter measuring device 10 is configured by applying a commercially available caliper, for example, a capacitance caliper (see, for example, JP-A-8-189801). Further, the diameter d of the circumscribed circle G of the wire rope 13 to be measured is usually 40 mm or less, preferably around 18 to 30 mm (in this embodiment, 30 mm). In order to simplify the description, the longitudinal direction of the guide member 12 is defined as the front-rear direction, and the horizontal direction orthogonal to the front-rear direction is defined as the left-right direction.

The guide member 12 is made of stainless steel and is formed in an elongated rectangular plate shape having a length N, a width W, and a thickness T. As an example, the guide member 12 has a length N = 150 to 200 mm, a width W = 10 to 20 mm, and a thickness T = 2 to 5 mm.
Insertion of a finger, which is an example of a first finger latching portion, through which the remaining two fingers other than the thumb of a human hand (for example, the index finger and the middle finger) are inserted into the lower surface 18 of the front end portion 12a of the guide member 12 A finger hook member 21 in which holes 19 and 20 are formed is disposed via a seat 22, and is detachably attached to the guide member 12 by a screw fastening mechanism (not shown). The finger hanging member 21 is made of stainless steel, and is formed in a substantially rectangular plate shape having a length n in the left-right direction, a width w, and a thickness t (excluding the receiving seat 22). As an example, the size of the finger hanging member 21 is set such that the length n = 70 to 120 mm, the width w = 30 to 45 mm, and the thickness t = 5 to 10 mm.

The finger insertion holes 19, 20 of the finger-hanging member 21 are formed in a substantially rectangular shape with a gap K in a direction (left-right direction) orthogonal to the longitudinal direction of the guide member 12. The length is x and the width is y in the front-rear direction. The sizes of the finger insertion holes 19 and 20 are, for example, a length x = 20 to 30 mm and a width y = 15 to 25 mm. The four corners of the finger-hanging member 21 and the four corners of the finger insertion holes 19 and 20 are R-processed.

On the lower surface 23 of the finger-holding member 21 on the moving side measurement jaw 14 side that avoids interference with the finger insertion holes 19, 20, a rectangular plate-shaped rear surface receiving member disposed at intervals in the left-right direction of the finger-hanging member 21. The fixed-side measuring jaw 11 is detachably attached via a member 24 and 25 by a screw fastening mechanism (not shown). The sizes of the back receiving members 24 and 25 are, for example, a longitudinal length s = 15 to 25 mm, a lateral width r = 10 to 15 mm, and a thickness h = 2 to 4 mm.
The fixed-side measuring jaw 11 having a length g in the left-right direction has an L-shaped angle member 26 having a length e on the short side and a length f on the long side, and a central portion in the left-right direction of the angle member 26. And a rib member 27 having a triangular shape provided integrally with the back portion of the head. The size of the angle member 26 is, for example, a length g = 50 to 60 mm, a short side length e = 5 to 15 mm, and a long side length f = 15 to 25 mm.

At an intermediate position in the front-rear direction of the guide member 12, a block-like slide member 29 having a rectangular cross-sectional slide hole 28 that can slide the rectangular cross-sectional guide member 12 is slidably provided. A rectangular plate-shaped back receiving member 30 that can be inserted between the back receiving members 24 and 25 is provided on the lower surface of the end portion of the slide member 29 on the finger-holding member 21 side, and the slide member is interposed via the back receiving member 30. The moving side measuring jaw 14 is screwed to 29 so as to be detachable. The back surface receiving members 24 and 25 and the back surface receiving member 30 are respectively provided with guide surfaces that come into contact with the outer peripheral portion of the wire rope 13 and are orthogonal to the gripping surfaces 16 and 17 that form a pair on which the wire rope 13 is gripped.

The moving side measuring jaw 14 is configured differently from the fixed side measuring jaw 11. That is, the moving side measuring jaw 14 having a length g in the left-right direction includes an angle member 31 having an L-shaped cross section having a length e on the short side and a length f on the long side, and the left-right direction of the angle member 31. And a triangular rib member 32 integrally provided on the back portion of the central portion. The size of the angle member 31 is the same as that of the angle member 26.

As shown in FIGS. 2 and 3, the gripping surfaces 16 and 17 that form a pair of the fixed side measuring jaw 11 and the moving side measuring jaw 14 are arranged in the axial direction of the wire rope 13 in at least three adjacent strands S of the wire rope 13. It is preferable to have a size that allows contact with the apex P of each other, and it is also possible to make contact with the apex P in the axial direction of at least two adjacent strands S. 2 and 3 show a state in which the apex P of three adjacent strands S out of the six strands S constituting the circumscribed circle G of the wire rope 13 is in contact with the gripping surfaces 16 and 17. Yes. The relationship between the length f of the long side of the angle member 31 forming the gripping surface 17 of the moving side measuring jaw 14 (same as the fixed side measuring jaw 11) and the diameter d of the circumscribed circle G of the wire rope 13 is f = (D / 2) +5 mm or more, and the length g in the left-right direction of the gripping surface 17 of the moving-side measuring jaw 14 is set to (2.0 to 3.0) d.

On the upper side of the front end portion of the slide member 29, a finger latching piece 33, which is an example of a second finger latching portion that can latch the palm side of the tip of the thumb, is provided. The portion of the piece 33 where the belly side of the thumb abuts is formed in a concave shape in plan view. A horizontal portion 34 is formed on the finger-holding piece 33 so that the tip of the thumb can come into contact with the finger-holding piece 33, and a vertical portion 35 is formed perpendicular to the end of the horizontal portion 34. Yes.

A digital measuring instrument 15 is provided on the rear side of the slide member 29. The digital measuring instrument 15 is provided on the slide member 29 with a slight gap between the fixed electrode group (not shown) attached to the guide member 12 and the fixed electrode group, similar to the capacitance caliper described above. A change in electrostatic capacitance between the movable electrode group (not shown) is detected, and a displacement amount of the movable measuring jaw 14 relative to the guide member 12 is measured, whereby a pair of gripping surfaces are measured. 16 and 17 are configured to measure the distance. The digital measuring instrument 15 is formed in a substantially rectangular parallelepiped shape, and a display unit 37 for displaying measured values is provided on the upper surface. An ON / OFF switch 38 and a zero reset button 39 are provided on the right side surface of the digital measuring instrument 15.

The moving distance of the slide member 29 with respect to the guide member 12, that is, the distance L between the pair of gripping surfaces 16 and 17 (the diameter d of the circumscribed circle G of the wire rope 13) is measured by the digital measuring instrument 15. Can be displayed. When the zero reset button 39 is pressed at a position where the paired gripping surfaces 16 and 17 are in contact with each other, the distance between the gripping surfaces 16 and 17 is reset to “zero”. A cylindrical spring retaining portion 40 is attached to the lower surface of the digital measuring instrument 15.

A rectangular stopper 41 through which the guide member 12 passes is fixed to the rear side of the slide member 29 of the guide member 12 by a screw fastening mechanism, and a spring latch of the slide member 29 is fixed to the lower surface of the stopper 41. A cylindrical spring hooking portion 42 is provided so as to face the portion 40. A coil spring 45 is provided between the pair of spring hooking portions 40 and 42. The moving side measuring jaw 14 is constantly urged by the coil spring 45 via the slide member 29 toward the stopper 41 side, that is, toward the side away from the fixed side measuring jaw 11. The rear end 43 of the normal slide member 29 is brought into contact with the front end 44 of the stopper 41 by the biasing force of the coil spring 45, and the movement on the rear side of the moving side measuring jaw 14 is restricted by the stopper 41. The distance L between the surfaces 16 and 17 is kept constant.

Further, the stopper 41 is provided with a rectangular parallelepiped cover 46 whose upper surface and front side surface are open and that does not interfere with the movement of the slide member 29 and the spring hooking portion 40. That is, the lower portion of the stopper 41, the coil spring 45, the lower end portion on the rear side of the digital measuring instrument 15, and the spring hooking portion 40 are covered with the cover 46. 1 and 2 show a state in which the diameter d of the circumscribed circle G of the wire rope 13 is measured by moving the slide member 29 forward against the urging force of the compressed coil spring 45. Yes.

Next, a method for measuring the diameter d of the circumscribed circle G of the wire rope 13 using the wire rope diameter measuring apparatus 10 according to one embodiment of the present invention will be described with reference to the drawings.
The distance L between the gripping surfaces 16 and 17 is reset to zero in advance. That is, the operator hooks the thumb on the finger retaining piece 33 of the slide member 29, and inserts the index finger and the middle finger into the finger insertion holes 19 and 20 of the finger hanging member 21, respectively. In the state where the gripping surfaces 16 and 17 are in contact with each other, the zero reset button 39 is pressed to reset to zero.
An operator carries the wire rope diameter measuring device 10 close to the measurement position of the wire rope 13 to be measured. At this time, due to the biasing force of the coil spring 45 and the stopper 41, the distance L between the gripping surfaces 16, 17 is maximum (35 mm in the present embodiment).

The operator hooks the thumb on the finger retaining piece 33 of the slide member 29, and inserts the index finger and the middle finger into the finger insertion holes 19 and 20 of the finger hanging member 21, respectively, to measure the wire rope diameter. After gripping, the wire rope 13 at the position to be measured is interposed between the fixed-side measuring jaw 11 and the moving-side measuring jaw 14, and the back receiving members 24, 25 of the fixed-side measuring jaw 11 and the moving-side measuring jaw 14. And it is made to contact with the guide surface of the back receiving member 30.

Thereafter, the moving-side measuring jaw 14 is brought close to the fixed-side measuring jaw 11 against the urging force of the coil spring 45, so that the gripping surfaces 16, 17 of the fixed-side measuring jaw 11 and the moving-side measuring jaw 14 1 to FIG. 3, the wire rope 13 is gripped. At this time, the measured value is displayed on the display unit 37 of the digital measuring instrument 15, and the distance L between the gripping surfaces 16 and 17, that is, the diameter d (30 mm) of the circumscribed circle G of the wire rope 13 can be accurately measured. it can.

The present invention is not limited to the above-described embodiments, and can be changed without departing from the gist of the present invention. For example, some or all of the above-described embodiments and modifications are included. The combination of the wire rope diameter measuring device of the present invention in combination also falls within the scope of the present invention.
In the present embodiment, the moving side measuring jaw 14 is always urged to the side away from the fixed side measuring jaw 11 via the coil spring 45. However, the present invention is not limited to this, and the coil spring is omitted if necessary. You can also. Further, although the coil spring is used as the urging member, the present invention is not limited to this, and other urging members can be used as necessary.

The fixed-side measuring jaw 11 is provided with two back receiving members 24 and 25, while the moving-side measuring jaw 14 is provided with one back receiving member 30, but this is not restrictive. Further, either one of the fixed side measuring jaw and the moving side measuring jaw can be provided with a back receiving member. Further, the fixed side measuring jaw is provided with one or more back receiving members, while the moving side measuring jaw is provided. Two or more back receiving members can be provided.

The finger-holding member 21 provided on the fixed-side measurement jaw 11 is provided with finger insertion holes 19 and 20, while the slide member 29 provided on the moving-side measurement jaw 14 is provided with a finger-holding piece 33. However, the present invention is not limited to this, and depending on the situation, a finger latch piece may be provided on the fixed side measurement jaw side, while a finger insertion hole may be provided on the moving side measurement jaw side. Also, a finger insertion hole or a finger locking portion can be provided on the fixed side measuring jaw side and the moving side measuring jaw side. Furthermore, although the finger latching piece 33 and the finger insertion holes 19 and 20 are formed in a direction orthogonal to the axial direction of the wire rope 13, the present invention is not limited to this, and the axial direction of the wire rope 13 may be used as necessary. Alternatively, it may be formed in a direction not orthogonal to the axial direction of the wire rope 13. Moreover, although the two finger insertion holes 19 and 20 were provided in the finger-hanging member 21, it is not limited to this, and if necessary, one or three to four finger insertion holes are formed. You can also.

Although the display part 37 which displays the measured value measured by the digital measuring instrument 15 was provided, it is not limited to this, A display part can also be abbreviate | omitted as needed.
The length g in the axial direction (left-right direction) of the wire rope 13 of the gripping surfaces 16 and 17 of the fixed side measuring jaw 11 and the moving side measuring jaw 14 is at least twice the diameter d of the circumscribed circle G of the wire rope 13 to be measured. However, the present invention is not limited to this, and the length g can be less than twice the diameter d as necessary.
Although the capacitance type digital measuring instrument 15 is provided as the measuring means, the present invention is not limited to this, and the moving displacement amount of the moving measuring jaw with respect to the guide member (corresponding to the caliper's main scale) as necessary. Can be measured by a combination of a normal caliper main scale and a vernier scale. Furthermore, other measuring means that can measure the distance between the gripping surfaces 16 and 17 can be used.

The stopper 41 is fixed at a fixed position in the longitudinal direction of the guide member 12 by the screw fastening mechanism. However, the present invention is not limited to this, and the stopper may be placed at an arbitrary position in the longitudinal direction of the guide member via the screw fastening mechanism. It can also be fixed to be movable. Thereby, the diameter of the circumscribed circle | round | yen of a wire rope of various sizes can be measured, and the versatility of an apparatus improves. However, the length f (corresponding to the length of the long side of the angle member 31) of the gripping surfaces of the fixed side measuring jaw and the moving side measuring jaw can correspond to the diameter of the circumscribed circle of the wire rope.
The fixed-side measuring jaw 11 is attached to the front end portion of the guide member 12 by screw fastening via the finger-hanging member 21 and the back receiving members 24 and 25. However, the present invention is not limited to this. It is also possible to form the measuring jaw from a single member.

It is a front view of the measuring device of the wire rope diameter concerning one embodiment of the present invention. It is a top view of the measuring apparatus of the wire rope diameter. It is a side view of the measuring device of the wire rope diameter. (A), (B) is explanatory drawing which respectively shows the case where the diameter of the circumcircle of a wire rope is not measured correctly, and the case where it measures correctly.

Explanation of symbols

10: Wire rope diameter measuring device, 11: Fixed side measuring jaw, 12: Guide member, 12a: Front end, 13: Wire rope, 14: Moving side measuring jaw, 15: Digital measuring instrument (measuring means), 16, 17: Grasping surface, 18: Lower surface, 19, 20: Finger insertion hole (first finger latching portion), 21: Finger hooking member, 22: Receiving seat, 23: Lower surface, 24, 25: Back surface receiving member, 26: Angle material, 27: Rib material, 28: Sliding hole, 29: Slide member, 30: Back receiving member, 31: Angle material, 32: Rib material, 33: Finger retaining piece (second finger hook) Stop part), 34: Horizontal part, 35: Vertical part, 37: Display part, 38: Switch, 39: Zero reset button, 40: Spring hook part, 41: Stopper, 42: Spring hook part, 43: Rear End, 44: Front end, 45: Coil spring (biasing member), 46: Cover

Claims (5)

An apparatus for measuring the diameter of a circumscribed circle of a wire rope in which a plurality of strands are twisted,
A guide member provided with a fixed measurement jaw at one end;
A moving side measuring jaw provided movably in the longitudinal direction of the guide member;
Measuring means for measuring a moving displacement amount of the moving side measuring jaw with respect to the guide member;
A biasing member that biases the moving side measurement jaw toward the side away from the fixed side measurement jaw;
An apparatus for measuring a wire rope diameter, wherein a pair of gripping surfaces formed at a parallel interval are brought into contact with the wire rope on each of the fixed side measuring jaw and the moving side measuring jaw. 2. The wire rope diameter measuring device according to claim 1, wherein each of the fixed-side measuring jaw and the moving-side measuring jaw has a first finger hook capable of hooking one of the thumb of one hand and a finger other than the thumb. An apparatus for measuring a wire rope diameter, characterized in that a second finger latching portion capable of latching the stopper is provided. The wire rope diameter measuring device according to any one of claims 1 and 2, wherein an axial length of the wire rope of the gripping surface is at least twice a diameter of a circumscribed circle of the wire rope to be measured. A wire rope diameter measuring device having a length of The wire rope diameter measuring apparatus according to any one of claims 1 to 3, wherein either one or both of the fixed side measuring jaw and the moving side measuring jaw are arranged on an outer peripheral portion of the wire rope to be gripped. An apparatus for measuring a diameter of a wire rope, comprising a back receiving member provided with a guide surface that is in contact with and perpendicular to the gripping surfaces that form a pair. The wire rope diameter measuring device according to any one of claims 1 to 4, wherein the measuring means is provided with a display unit for displaying the measured values. apparatus.

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