JPH0425634Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to an ironing test device that applies ironing to a cable under test in order to measure its characteristics.

(Technical background of the invention and its problems) Conventionally, when applying strain to a cable under test such as an optical fiber cable, a rail is installed in a straight line, the cable under test is placed along the rail, and the cable under test is placed on the rail. The cable under test is repeatedly strained by installing a straining section on the trolley and moving the trolley back and forth.

However, when installing rails in a straight line to move the cart back and forth, a large installation space is required, and the space cannot be used effectively.

(Purpose of the invention) The purpose of the invention is to provide a cable straining test device that can be installed in a small space.

(Summary of the invention) This invention connects a seine net to both ends of the cable under test in a loop shape with the ironing section fixedly arranged, and the seine net is guided by a guide section and moved in a reciprocating direction by a traction machine. The cable under test is towed to move the cable under test back and forth with respect to the straining section.

(Embodiments of the invention) Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.

The ironing test device according to the present invention includes an ironing section 1, as shown in the drawings. This training part 1
has a fixedly installed pedestal 2 and a roller support 3 placed in the center of the pedestal 2, and a plurality of rollers 3a are arranged in an arc shape on the roller support 3 and are rotatable. Supported. Belt attachment bodies 4 are supported on both sides of the frame 2, and an endless belt 4a is wound around belt pulleys (not shown) of these belt attachment bodies 4. Then, the optical fiber cable 10 as the cable to be tested is passed under one of the endless belts 4a, and is passed through a plurality of rollers 3.
a, and is further passed under the other endless belt 4a.

Load cells 5, 5 are attached to both ends of the optical fiber cable 10 via internal tension members, and one end of each of seine nets 6A, 6B is connected to each load cell 5, 5. These seine nets 6A, 6
B is guided by a plurality of guide portions 7, and the other ends thereof are connected to each other via a chain block 8.
Therefore, the seine nets 6A, 6B and the optical fiber cable 1
0 will be connected in a loop. Each guide portion 7 has a plurality of rollers 7a arranged in an arc shape.
These rollers 7a are rotatably supported on a support base 7b. The seine nets 6A, 6B are guided with a predetermined curvature by these rollers 7a.
The chain block 8 has a normal configuration in which a load chain is wound around a combination of gears, etc., and the hooks 8a, 8a approach or separate by operating the hand chain, thereby attaching the seine nets 6A, 6B and the optical fiber cable 10. A desired tension can be applied. The seine net 6A is held between a pair of endless belts 9a, 9a of the traction machine 9. This traction machine 9 is driven in forward and reverse rotation by a control section (not shown).

Next, the mode of use of the ironing test device of the present invention will be explained.

That is, first, a predetermined length of the optical fiber core 10a is exposed at both ends of the optical fiber cable 10, and the optical fiber core 10a is placed in a loop shape on the floor or the like.
Connect both terminals of a to the optical measuring device 11.

Next, by operating the hand chain of the chain block 8, the hooks 8a, 8a are brought closer together, and the seine net 6A,
6B and fiber optic cable 10. Then, this tension is detected by the load cell 5, and the operation of the chain block 8 is stopped when the desired tension is obtained. In this case, since the roller 7a of the guide portion 7 has a frictional resistance, the tension is set in consideration of this frictional resistance.

Next, the traction machine 9 is driven in normal rotation to move the optical fiber cable 10 in the direction of the arrow, and the optical fiber cable 10 is strained by the straining section 1. That is, the optical fiber cable 10 is drawn between the plurality of rollers 3 of the ironing section 1 and the endless belts 4a, 4a while applying lateral pressure. Then, when the load cell 5 on the seine net 6B side approaches the ironing part 1, the towing machine 9 is driven in reverse, and the optical fiber cable 10
Move in the opposite direction and apply lateral pressure in the same way.

The optical fiber cable 10 is moved back and forth about five times, and the optical measuring device 1 is repeatedly strained.
1, an optical signal is input to one end of the optical fiber core 10a of the optical fiber cable 10, and the light is received at the other end to measure its optical loss characteristics.

In this way, the dragnet 6 is attached to the optical fiber cable 10.
When A and 6B are connected in a loop and a traction force is applied to the seine 6A in the reciprocating direction by the traction machine 9,
Optical fiber cable 1 even in small installation space
0 can be moved back and forth to apply straining by the straining section 1.

In the above embodiment, the chain block 8 may be replaced with another tension setting device such as a turnbuckle, and the guide portion 7 may be constituted by one guide roller having a large diameter.

Furthermore, it is logical that the straining section 1 should have a configuration that can apply lateral pressure to the optical fiber cable 10.

(Effects of the invention) According to the invention, the cable to be tested is arranged in a fixedly arranged ironing part, the seine is connected in a loop shape to both ends of the cable to be tested, and the seine is moved in a reciprocating direction by a towing machine. By applying a traction force to the cable, it is possible to apply strain to the cable under test in a small installation space. Therefore, it is possible to provide a cable straining test device that can effectively utilize space.

[Brief explanation of the drawing]

The drawing is a perspective view showing the overall configuration of the ironing test device according to the present invention. 1...Stretching part, 3a...Roller, 4a...Endless belt, 5...Load cell, 6A, 6B...Seine net, 7...Guide part, 8...Chain block,
9... Towing machine, 10... Optical fiber cable.

Claims (1)

[Claims for Utility Model Registration] 1. A straining section that is fixedly arranged and applies strain to the cable under test each time it moves back and forth, and a dragnet connected in a loop to both ends of the cable under test; A cable straining test device comprising: a guide section that guides the seine; and a traction machine that applies a traction force to the seine in a reciprocating direction. 2. The cable straining test device according to claim 1, wherein the cable under test and the seine are connected via a load cell. 3. The cable ironing test device according to claim 1 or 2, characterized in that a chain block for tension setting is arranged on the seine side.