JP2000329665A - Strength testing apparatus for cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a strength testing apparatus which tests whether the strength of a cable such as a thread, a rope stretched on the hook of a crane a climbing rope hooked on a piton a string, a wire or the like reaches a set reference or not. SOLUTION: For example, a thread 31 is used as a cable. One end of it is connected to a plumb hob 38. The thread is wound and hooked on a pulley 33 on one side it is inserted into, and passed through, the loop 32B of a pedestal 30, the thread is wound and hooked on a pulley 34 on the other side, and the other end part of it is connected to a cable fixation body 45 so as to be set. A state that the thread 31 is rubbed due to the back-and-forth rotating motion of its forward motion and its reverse motion on the basis of the rotation of the pedestal 30 is created. A state that the thread 30 is rubbed due to its pull on the basis of its up-and-down operation while the plumb hob 38 is being lifted up due to the up-and-down motion of the cable fixation body 45 is created. Thereby, the strength test of the thread 31 is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread, a rope for hanging on a hook of a crane, a rope for hanging on a haken,
The present invention relates to a strength test device for testing whether the strength of a long member such as a string or a wire (in the present specification, these are collectively referred to as a “strip”) has reached a certain standard. The present invention relates to an apparatus for testing the strength by giving a state of rubbing by rotation or pulling.

[0002]

2. Description of the Related Art Conventionally, as a device for testing whether or not the strength of a button sewn on a cloth such as a coat or a suit has reached a certain standard, when a button is subjected to rotational vibration such as normal rotation or reversal, At the same time, a device for testing the mounting strength of a button by tensioning or relaxing the button with a certain strength is known (Japanese Patent Application Laid-Open No. Hei 9-17690).
No. 6).

[0003]

However, such a test apparatus can test the mounting strength of the button, but cannot test the strength of the thread that sew the button to the cloth, and cannot mount the button. Before testing the strength, a device for testing whether the strength of the yarn has reached a certain standard is widely desired.

The present invention has been made to solve the above-mentioned problems, and the strength of ropes such as ropes hooked on a crane, ropes hooked on a haken, cords, strings, wires, etc., reaches a certain standard. It is an object of the present invention to provide a strength test device for testing whether or not the test is performed.

[0005]

In order to achieve the above-mentioned object, a cable strength test apparatus according to the present invention comprises a first vertical moving means provided on an upper portion, and a vertical moving means provided by the first vertical moving means. A cylinder having a helical cam groove formed in the peripheral wall, and a cylindrical hole is inserted into the center hole of the cylinder so as to be vertically movable.
A rotating shaft that is provided with a cam follower that protrudes into the spiral cam groove on an outer peripheral surface thereof, and that performs a reciprocating rotation of forward rotation and reverse rotation by moving the cam follower along the spiral cam groove; A pedestal that is attached to the shaft and has forward and reverse reciprocating rotational motion, and has a rope support portion that inserts and supports the rope at the lower portion, and a horizontal rotation center axis that is parallel to each other below the pedestal. A pair of rotatable pulleys, a weight vertically movably supported below the pulley, and a second vertically moving means provided below the pulley;
And a rope fixing body that is vertically moved by the second vertically moving means. The rope to be subjected to the strength test is connected at one end to the weight, and is wound around one of the pulleys. It is inserted into the rope support of the pedestal, wrapped around the other pulley, the other end is connected to the rope fixed body and set, and the reciprocating rotational movement of forward rotation and reverse rotation based on the rotation of the pedestal And a rubbing state of the rope by pulling based on the vertical movement while lifting the weight by the vertical movement of the rope fixing body, thereby performing a strength test of the rope.

[0006] In this case, the first up-and-down moving means includes a first
And a first cam connected to and rotated by a rotary drive shaft of the first motor; and a cam follower of the first cam, which is moved up and down along the cam follower, and connected to the cylinder. And a first vertical movement bar to be used.

The second up-and-down moving means includes a second motor, a second cam connected to and rotated by a rotary drive shaft of the second motor, and a cam follower of the second cam. And a second vertically moving bar which is brought into contact with, is moved up and down along the cam follower, and is connected to the cable fixing body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. First, the principle of operation of the cable strength test device of the present invention will be described with reference to FIGS.

In other words, the apparatus for testing the strength of a cable includes a first vertical moving means 1, a cylinder 2, a rotating shaft 3, a pedestal 4, a pair of pulleys 5, 6, and a second vertical moving means. 7, the weight 8, and the cable fixing body 8.

The first vertically moving means 1 comprises a first motor 1A, a first cam 1C which is connected to and rotated by a rotary drive shaft 1B of the first motor 1A, and a first cam 1C. A first vertical movement bar 1E is brought into contact with the cam follower 1D of 1C and moves up and down along the cam follower 1D.

The cylinder 2 has a spiral cam groove 2A formed on a peripheral wall thereof. The rotating shaft 3 is inserted into the center hole 2B of the cylinder 2 so as to be vertically movable, and has a cam follower 3A protruding from the outer peripheral surface of the cylinder 2 in a spiral cam groove 2A. When the cam follower 3A moves along the groove 2A, the cam follower 3A reciprocates in forward and reverse rotation.

Further, the pedestal 4 is attached to the rotating shaft 3 so as to be provided with reciprocating rotational movements of forward rotation and reverse rotation, and has a rope supporting portion 4A at its lower part for inserting and supporting the rope. ing. The pair of pulleys 5 and 6 are rotatably supported below the pedestal 4 so as to be rotatable about mutually parallel horizontal rotation axes. Further, the weight 8 is supported to be able to move up and down below the pulleys 5 and 6.

The second vertically moving means 7 includes a second motor 7A, a second cam 7C which is connected to and rotated by a rotary drive shaft 7B of the second motor 7A, and a second cam 7C. Cam 7C
, And a second vertical movement bar 7E which is moved up and down along the cam follower 7D. The rope fixing body 9 is fixed to the second vertically moving bar 7E below the pulleys 5 and 6 via a fixing member 7F.

In the apparatus for testing the strength of a rope having such a configuration, for example, a string 10 is used as the
And wound around one of the pulleys 5 and inserted into the rope supporting portion 4A of the pedestal 4, and wound around the other pulley 6, and the other end is connected to the rope fixing body 9 and set. And
The rubbing state of the thread 10 due to the reciprocal rotation of the forward rotation and the reverse rotation based on the rotation of the pedestal 4 and the rubbing of the thread 10 due to the pulling based on the vertical movement while lifting the weight 8 due to the vertical movement of the rope fixing body 9 The strength test of the yarn 10 can be performed by making a state.

In the vicinity of the cable fixing member 9,
An optical sensor 11 for counting the number of vertical movements of the cable fixing body 9 is provided, and is used to control the number of vertical movements of the cable fixing body 9 for a test to a predetermined value.

Next, referring to FIGS. 1 and 2, a more specific configuration of one embodiment of the cable strength test apparatus of the present invention will be described. The first motor 20 that constitutes one of the first vertically moving means of the present embodiment is supported by a support bar 22 that extends horizontally in the lateral direction of the apparatus main body frame 21. A disk 24 constituting a first cam is connected to the rotation drive shaft 23 of the first motor 20.
Cam follower 2 eccentric to the center of rotation
5 are connected.

The first vertically moving bar 26 is provided on the support bar 22.
, And the lower surface thereof is in contact with the outer surface of the cam follower 25 of the first cam. A spiral cam groove 27B is formed on the peripheral wall of the cylinder 27, and a flange portion 27A at the upper end thereof is fixed to the vertical movement bar 26.

The rotating shaft 28 is penetrated through the center hole of the cylinder 27, and its upper end is rotatable freely on the upper wall 29A of a substantially rectangular frame 29 formed on the upper part of the apparatus main body frame 21. It is supported through. A cam follower 28A protrudes from the outer peripheral surface of the rotary shaft 28. The cam follower 28A is formed in a cam groove 27B in a spiral shape of the cylinder 27.
Rushed into.

Further, the lower end of the rotary shaft 28 is rotatably penetrated and supported by the lower wall 29B of the frame 29, and the pedestal 30 is fixedly attached to the protruding end from the lower wall. The pedestal 30 is formed in a substantially U-shape, a lower end of the rotating shaft 28 is fixed to an upper end thereof, and a yarn as a cord supporting portion for inserting and supporting the yarn 31 to be tested at the lower end. The support member 32 is mounted.

The thread support member 32 comprises a disk 32A and a loop 32B fixed to the lower end of the disk 32A. The pair of pulleys 33 and 34 are rotatably supported below the pedestal 30 about the rotation center axes of a pair of lateral support bars 35 parallel to each other. That is,
A pair of lateral support bars 35 are provided horizontally, and each lateral support bar 35
Are rotatably supported by a pair of bearing members 37 fixed to lower ends of a pair of vertical support bars 36 supported by lower ends 29B of the frame body 29.

The weights 38 are arranged so as to be able to move up and down inside weight supports 39 disposed below the pulleys 33 and 34, and guide shafts 38 provided at both ends thereof.
A is inserted and supported in vertically elongated guide grooves 39A formed on both side walls of the weight support 39.

A second motor 40 constituting one of the second vertical moving means of the present invention is supported by the bottom of the apparatus main body frame 21. A disk 41 constituting a second cam is connected to the rotary drive shaft 40A of the second motor 40, and a cam follower 42 is connected at a position eccentric to the rotation center of the front surface of the disk 41. I have.

The second vertically moving bar 43 is disposed horizontally below the pulleys 33 and 34 at the bottom of the apparatus main body frame 21 and at the rear of the weight support 39, and has both ends on both sides of the bottom of the apparatus main body frame 21. Support 44 disposed in the section
The cam follower 42 is supported on the lower surface
The outer surface is in contact. The cable fixing member 45 is fixedly attached to the second vertically moving bar 43.

In the strength test apparatus for a rope having such a configuration, when performing a strength test of the rope, for example, the thread 31, the one end of the thread 31 is connected to the weight 38 and the one of the pulleys 33 is connected to the pulley 33. It is wound around and inserted into the loop 32B of the pedestal 30 and wound around the other pulley 34, and the other end is connected to the cable fixing body 45 and set.

When the first motor 20 is driven,
The first cam, that is, the disk 24 rotates, and accordingly, the first vertically moving bar 26 moves up and down, and the cylinder 27 moves up and down. The vertical movement of the cylinder 27 causes the cam groove 27 to move.
When B rotates, the cam follower 28A on the outer peripheral surface of the rotating shaft 28 is guided by the cam groove 27B, so that the rotating shaft 28 rotates and the pedestal 30 rotates.

The rotation of the pedestal 30 causes the loop 32
Since the reciprocating rotational movement of the normal rotation and the reverse rotation is given to the thread 31 inserted through B, the thread 31 is rubbed. That is, the torsional strength of the yarn 31 is tested by the rubbing state of the yarn 31 due to the reciprocal rotation of the forward rotation and the reverse rotation based on the rotation of the pedestal 30.

On the other hand, when the second motor 40 is driven, the second cam, that is, the disk 41 rotates, and accordingly, the second vertical moving bar 43 is moved up and down, and the cable fixing body 45 is moved.
Moves up and down. By the vertical movement of the cable fixing body 45,
Since the thread 31 moves up and down while the weight 38 is lifted, a rubbing state due to the tension of the thread 31 is created.

That is, the tensile strength of the yarn 31 is tested by the rubbing state of the yarn 31 by the pulling based on the vertical movement while lifting the weight 38 by the vertical movement of the cable fixing member 45.

According to the cord strength testing apparatus having the above-described structure, for example, the strength of the thread for sewing the button to the cloth can be tested, and the strength of the thread is constant before the strength of the button is tested. You can test whether the standard is reached. In addition, it is possible to test whether the strength of a rope such as a rope, a rope hung on a hook of a crane, a rope, a string, a wire, or the like hooked on a haken has reached a certain standard.

It should be noted that the position of the weight 4
Optical or other sensor 49 for counting the number of up and down operations of 8
Is used to control the number of vertical movements of the weight 48 for the test to a predetermined value.

[0031]

According to the cable strength testing apparatus of the present invention,
The rope to be subjected to the strength test has one end connected to the weight, and is wound around one pulley of the pair of pulleys, inserted into the rope support portion of the pedestal, and wound around the other pulley. ,
The other end is connected to the rope fixing body and set, and the rubbing state of the rope due to the reciprocal rotation of the forward and reverse rotation based on the rotation of the pedestal and the lifting of the weight due to the vertical movement of the rope fixing body. Since the rope was rubbed by pulling up and down based on the vertical movement, the strength of the rope was tested. It is possible to easily test whether the strength of a rope such as a rope hooked on a crane hook, a rope, a string, a wire hooked on a haken, or the like, has reached a certain standard. Conventionally, the strength test of this type of rope has mainly been performed by a tensile test.
ADVANTAGE OF THE INVENTION According to this invention, the intensity | strength with respect to a torsion can also be measured and the test matched with the actual use of a cord can be performed.

In this case, the first vertically moving means is connected to a first motor, a first cam which is connected to and rotated by a rotation drive shaft of the first motor, and a cam follower of the first cam. A first up-down bar which is brought into contact with, is moved up and down along the cam follower, and is connected to the cylinder, and a second up-down movement means is provided with a second motor, the second motor, A second cam connected to and rotated by a rotary drive shaft of the motor, a second cam contacted with a cam follower of the second cam, moved up and down along the cam follower, and connected to the cable fixing body. With a simple structure, it is possible to reliably apply forward and reverse reciprocating rotational movement and vertical movement while lifting the weight to the rope with a simple structure. .

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a cable strength test apparatus of the present invention.

FIG. 2 is a right side view thereof.

FIG. 3 is a schematic diagram for explaining the operation principle of the cable strength test device of the present invention, and is a diagram showing a relationship between a first vertical movement means, a cylinder, and a rotation axis.

FIG. 4 is a schematic view of the same, showing a relationship between a rotating shaft and a pedestal.

FIG. 5 is a schematic view of the same, showing the relationship between the second vertically moving means and the rope fixing body.

FIG. 6 is a schematic view showing the same as above, and shows the relationship between the cable fixing body, the pulley, and the weight.

[Explanation of symbols]

 Reference Signs List 20 first motor 24 disk 25 cam follower 26 first vertical movement bar 27 cylinder 27 27B cam groove 28 rotation shaft 28A cam follower 30 pedestal 31 thread 32 thread support member 33, 34 pulley 38 weight 39 weight support 40 second Motor 41 Disk 42 Cam follower 43 Second vertical moving bar 44 Support 45 Cable fixing body

Claims (3)

[Claims] A first vertically moving means provided on an upper part;
A cylinder having a helical cam groove formed in a peripheral wall formed by the first up and down movement means, and inserted into the center hole of the cylinder so as to be vertically movable and projecting into the helical cam groove; A rotating shaft that reciprocates in forward and reverse rotations by the cam follower moving along a spiral cam groove, and a rotating shaft attached to the rotating shaft. A pedestal having a rope support portion that is provided with a reciprocating rotational movement of reverse rotation and inserts and supports a rope at a lower portion, and a pair of pulleys that can rotate around horizontal rotation center axes parallel to each other below the pedestal, A weight supported movably below the pulley, a second vertically moving means provided below the pulley, and a rope fixing body vertically moved by the second vertically moving means, Cables subject to strength test With one end thereof connected to the weight, wound around one pulley and inserted into the rope support portion of the pedestal, and wound around the other pulley, and the other end of the rope fixed body. The rope is rubbed by forward and reverse reciprocating rotation based on the rotation of the pedestal, and the rope is pulled by the vertical movement while lifting the weight by the vertical movement of the rope fixed body. An apparatus for testing the strength of a cable, which performs a strength test of the cable by creating a rubbing state of the cable. 2. The first up-and-down moving means includes a first motor, a first cam connected to and rotated by a rotary drive shaft of the first motor, and a cam follower of the first cam. 2. The cable strength test device according to claim 1, further comprising a first vertical bar that is brought into contact with, moves up and down along the cam follower, and is connected to the cylinder. 3. The second up-and-down moving means includes a second motor, a second cam connected to and rotated by a rotary drive shaft of the second motor, and a cam follower of the second cam. The cable strength test apparatus according to claim 1, further comprising a second vertical bar that is in contact with, moves up and down along the cam follower, and is connected to the cable fixing body. .