JPS62222142A - Apparatus for imparting ironing to cable - Google Patents

Abstract

PURPOSE:To perform an accurate test while ironing is applied to a cable, by allowing a truck to run at a constant running speed while constant tension is applied to the cable. CONSTITUTION:A guide means 16 is engaged with one side of a cable 12 to which ironing must be applied and consists of a pair of ironing imparting guide members 14, 14' movable in a freely advancing and retracting state with respect to the cable 12 and arranged so as to provide an definite interval therebetween. A tension applying means 20 comprises suspended wts. 18 for imparting definite tension to at least one end of the cable 12. The members 14, 14' are retracted upwardly to connect the cable 12 to be tested to the means 20 and the cable 12 is engaged with the metal wheel 22 of a self-propelling truck 24 and, thereafter, the members 14, 14' are allowed to fall until engaged with the cable 12 and set. When the truck 24 is allowed to run itself toward an arrow R in this state, the truck 24 moves at a constant speed and the left-hand wt. 18 rises by the ironing resistance of the cable 12 while the right-hand wt. falls and the truck 24 stops at the point of time when the right-hand wt. is contacted with a floor to impart the first ironing to the cable 12. Next, the truck 24 is moved to an arrow L and the second ironing is imparted to the cable 12 in the same way.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a method for testing cables such as optical cables for their transmission characteristics such as transmission loss, mechanical strength such as the occurrence of @, or temperature characteristics. The present invention relates to a device for attaching.

(Prior Art) Generally, in order to apply strain to this type of cable, a trolley has a pair of guide rollers that engage one side of the cable and a wheel that pulls the cable in its radial direction between these guide rollers. A device consisting of is used. In conventional devices, the end of the cable is only fixed with a cleat, etc., so abnormal tension occurs at the fixed part on the downstream side in the running direction of the trolley, resulting in uneven tension. Because of the uneven running speed, it was not possible to accurately test various properties of the cable.

(Object of the invention) The object of the invention is to provide a cable with a constant tension while
Another object of the present invention is to provide a cable straining device capable of applying strain to a cable while running a trolley at a constant running speed.

(Structure of the invention) A cable straining device according to the present invention.

a guide means including a pair of straining guide members disposed at a constant interval that engage one side of the cable to be strained and move forward and backward with respect to the cable; and at least one of the cables. A self-propelled tensioning means including a weight that applies a constant tension to one end, and a metal wheel that pulls the cable in the radial direction of the cable between a pair of guide members to the side opposite to the side where the guide member engages. It is characterized by being equipped with a trolley.

In this way, a predetermined constant tension is applied to the cable, and the trolley can run on its own at a constant speed, making it possible to accurately test various characteristics while applying strain. can.

(Embodiment) An embodiment of the present invention will be described in detail with reference to the drawings. Fig. 4 shows a cable straining device 10 according to the present invention, and this straining device 10 is used to apply straining to a cable. A pair of roller-shaped guide members 14, 1 for squeezing, which are arranged at a constant interval and engage one side of the cable 12.
a tension applying means 20 comprising a weight 18 for applying a constant tension to at least one end of the cable 12; and a guide member 14.14'' between the pair of guide members 14, 14'. A self-propelled trolley 24 including a metal wheel 22 that pulls the cable 12 in its radial direction on the side opposite to the side where the cable 12 is engaged.
It is equipped with The guide members 14, 14' are movable in the vertical direction by a driving source such as an air cylinder (not shown), so that they can be moved forward and backward relative to the cable 12.

Tensioning means 20 includes a lead wire 2 connected to one end of cable 12 by a fitting 26 in the illustrated embodiment.
8 is vertically oriented by three pulleys 29, and a weight 18 is attached to the lower end of the cable 12. However, a weight having the same weight as the weight 18 with a similar structure may be attached to the other end of the cable 12. Yes, the three pulleys 29 are attached to the stand 31.

The self-propelled trolley 24 has wheels 30 and 30' that engage with the floor and a pair of guide rails 3, as can be seen from Figure wIJ3.
2.32', and a generator 38 mounted on the truck body 36. A drive system consisting of a motor 40 driven by this iJi machine 3B, and a timing belt/boot mechanism 42 to which power is transmitted from the motor 40, a transmission means 48 including a speed change @ 44 and a chain ψ sprocket mechanism 46. 50.As can be seen from FIG.
It is attached to 2.

Next, to describe the operation of the present invention, the straining guide member 14.14° is retracted upward, the cable to be tested is connected to the tensioning means 20 as shown in FIG. is engaged with the metal wheel 22 of the guide member 14.
．． 14° until it engages with the cable 12 and set. In this state, when the self-propelled carts 24 are self-propelled, for example, toward the right in FIG. 1, each of the carts 24 moves in the same direction at a constant speed, and the cables 12 are sequentially strained. That is, when the tension applying means 20 are provided on both sides of the cable 12 to apply tension to the cable, the weight on the left side rises due to the straining resistance of the cable 12, and the weight on the right side descends. The movement of the trolley 24 is stopped when the weight contacts the floor, and the first strain is applied to the cable 12.0 Next, when the trolley 24 starts moving to the left, the weight on the right side rises. When the weight on the left side descends and touches the floor, the movement of the cart stops, and the cable is given a second strain, and the reciprocating movement of the platform is completed. As a result, the cable is given a desired number of strokes from the left and right directions of the cable.

If the tension applying means 20 is provided only on one side of the cable, for example, on the left side, the weight on the left side is lifted from the floor and suspended from the left end of the cable, and the right end of the cable is fixed by a fixing member (not shown). With the cable clamped to a tension determined by the weight of the weight, the trolley is moved to the right a predetermined distance to give the cable the first strain (in this case, one weight is suspended). (It doesn't move down at all). To give the cable the second and subsequent strokes, release the cable from the metal wheel on the 9-cart, move the cart to the left to its original position, and engage the cable with the metal wheel again. The operation of moving the cart to the right may be repeated, and in this case, the cable will be strained from one side. Incidentally, during these two cable-stretching operations, a worker may operate the cables while riding on the self-propelled trolley 24, or may operate them by remote control.

In the embodiment described above, the guide rollers 34, 34' are engaged with the pair of rails 32, 32' to cause the wheels to roll on the floor, but the wheels may be directly engaged with the rails. Furthermore, the self-propelled trolley 24 may be driven by a motor from outside via a cable or the like without being equipped with a generator; however, driving the self-propelled trolley with an engine lacks stability in running speed and tension. So I don't like it. Additionally, tension can be monitored by placing a load cell within the fitting 26.

The travel range of the self-propelled trolley 24 can be regulated by installing a limit switch, and the cable length to be tested can be adjusted by adjusting the lead wire length. However, it is possible to install two or more sets of guide rollers for applying stress and apply two or more types of stress at the same time. Various tests, such as properties, temperature properties, presence of external damage, and mechanical properties such as tensile strength, are conducted by removing the cable from the straining device as necessary.

(Effects of the Invention) According to the present invention, as described above, since it is possible to apply ironing at a constant traveling speed and while applying a constant tension, there is a practical benefit that the ironing test can be conducted with high accuracy.

[Brief explanation of drawings]

1 to 3 are a front view, a top view, and a side view, respectively, of a cable straining device according to the present invention. 10---- Cable straining device, 12---
--Cable, 14.14'--Guide member for squeezing, 18-- Weight, 20--11 Tension applying means, 22--- Metal wheel, 24-- ---1 self-propelled trolley, 40--1--motor, 50--1 drive system.

Claims (1)

[Claims] a guide means including a pair of straining guide members disposed at a constant interval that engages one side of the cable to be strained and is movable forward and backward with respect to the cable; tensioning means including a weight that applies a constant tension to at least one end; and a tensioning device that pulls the cable in the radial direction of the cable between the pair of guide members to a side opposite to the side where the guide member engages. A cable straining device characterized by comprising a self-propelled cart including a car.