JPH0316852Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cable feeding device that grips a cable by applying pressure between endless belts and feeds out the cable.

Prior Art The applicant previously filed an application for a cable feeding device suitable for laying optical fiber cables with weak mechanical strength and relatively small diameter and lightweight cables (patent application
56−29415 Cable feeding device).

This cable feeding device has a driving wheel 2, a driven wheel 3, and a pressing roller 5 arranged on a pair of support stands 1 as shown in FIG. The cable 8 is gripped between the endless belts 4, the screw shaft 14 is rotated to bring the pair of plates 13 closer to each other, and the coil spring S that supports the support base 1 is compressed to obtain a spring reaction force to create cable grip pressure. It was.

At this time, if a preset torque wrench PL is used as a handle to rotate the screw shaft 14, the optimal cable gripping pressure can be obtained by touch or sound, and by rotating the drive wheel 2, the endless belt 4 is rotated and the cable 8 is moved forward. was sent to.

Problems that the invention aims to solve In the conventional configuration, the cable gripping pressure between the endless belts was obtained by supporting the support base using the spring reaction force caused by the contraction of the coil spring S, so the cable gripping pressure between the endless belts was obtained. When the cables are fed out in order, like a towing rope, the diameter of the object passing through becomes thinner, the coil spring stretches and the gripping pressure decreases, and as a result, the feeding method that occurs in proportion to the gripping pressure also decreases and the specified feeding force is exerted. I couldn't do it anymore. On the other hand, when the diameter of the passing object, such as a pulling eye or twisted hardware, becomes thicker, the coil spring contracts and the gripping pressure increases, and this reaction force increases the mechanical loss of the drive unit, making it impossible to exert the desired feeding force. In other words, the gripping pressure changes every time the diameter of the object changes, making it impossible to maintain the optimal gripping pressure. Therefore, the installation is temporarily interrupted and the distance between the pair of supports is manually adjusted using the tightening handle to maintain the optimal gripping pressure. I had to send it out again after getting it. Such adjustment work requires a high level of skill, and also causes a drop in work efficiency due to interruptions in the laying work.

Means for Solving the Problems The present invention is configured such that a drive wheel and a driven wheel are rotatably supported at both ends, and the widths of the support bases can be changed perpendicularly to the cable feeding direction while keeping them parallel to each other. an endless belt is installed between the driving wheel and the driven wheel, and a plurality of pressing rollers are rotatably disposed inside opposing portions of the wireless belts that are close to each other and clamp the cable. In the cable feeding device, the presser roller is configured to urge the endless belt in a direction to clamp the cable, and the pair of support stands are provided with a presser roller support part that integrally projects upward at the upper center of the pair of support stands, A plurality of coil spring holder support members are fixed to the presser roller support portion, and a plurality of presser rollers are rotatably attached to the presser roller holder, and an elastic body is provided on the plurality of coil spring holder support members so that the presser roller holder can be slidably and In order to be able to swing back and forth around a support member for a coil spring holder at the center, the support base is supported via a constant pressure spring having a non-linear region in which the spring reaction force does not change depending on the amount of displacement.

Function The presser roller holder 10 in which a plurality of presser rollers 5 are rotatably attached has a plurality of coil spring holder support members 4b fixed to the presser roller support portion 1A of the support base 1, and a holder support member 11 and a coil spring. A coil spring 20, which is an elastic body, is provided through the holder 4a so that it can slide freely in the direction of clamping the cable and can swing back and forth around the central coil spring holder support element member 11A. Even when objects with different diameters pass between the rollers, the coil springs 20 are sequentially expanded or contracted to adjust the widths of the pair of presser roller holders 10 to be non-parallel, so as not to reduce the contact area of the endless belt 4 with the objects passing through. Operate.

When the support stand 1 supported by a constant pressure spring is moved toward the cable, both the support stand 1 and the constant pressure spring 17 move in the direction of the cable. At this time, if there is a cable etc. between the endless belt 4, it may cause the cable to move. When the support base 1 is gripped, the movement of the support base 1 stops, and from then on, the constant pressure spring 1
7 continues to move, and the constant pressure spring 17 is compressed. At this time, since one side of the constant pressure spring 17 is supported by the plate 13, the spring reaction force generated in the constant pressure spring 17 is transmitted to the presser roller holder 10 via the support base 1, and is further rotatably attached to the presser roller holder 10. Endless belt 4 by presser roller 5
This provides a gripping force for gripping the cable 8 and the like through the gripping force.

Embodiment Fig. 1 is a plan view of the cable feeding device of the present invention, Fig. 2 is a cross-sectional view of half of the cross-sectional view taken along the line X-Y in Fig. 1, viewed from the direction of the arrow, and Fig. 3 is a support stand, a base,
and an exploded perspective view of the plate.

In the figure, the same reference numerals as in FIG. 4 indicate parts having the same function.

In the figure, 1A is a presser roller support part of the support base 1, 4a is a coil spring holder, 4b is a support member for the coil spring holder, 5-1 is a presser roller shaft, 6 is a twisting hardware, 7 is a connecting metal fitting, 8 is a cable, 9
10 is a towing rope, 10 is a presser roller holder, 11
is a holder support member, 11-1 is a rotating shaft, 12 is a base, 13 is a plate, 14 is a pressure adjustment screw shaft (hereinafter referred to as the screw shaft), 15 is a constant pressure spring support shaft,
16 is a set shaft, 17 is a disc spring that is a constant pressure spring,
shows.

The configuration of the cable feeding device of the present invention will be explained.

Support stand 1 and plate 1 on the left and right with the base 12 in between
Holes 3 are arranged in order on the outside and penetrate through the center of the support stand 1 and the plate 13 that sandwich the base 12, respectively;
13a, 1a, 12a, 1a, 13a are drilled,
A screw is provided in the hole 13a, through which the common screw shaft 14 of the five holes is inserted, and a threaded portion 14a is provided at the tip to fit into the hole 13a. The end face of the screw shaft 14 has a hole 14 into which a preset type wrench is inserted.
b. The left and right support stands 1 are provided with through holes 1c for inserting constant pressure spring support shafts 15 on the left and right sides of the pressure adjustment screw shaft 14, and the constant pressure spring support shafts 15 are inserted thereinto.
One end is fixed to the hole 12b of the base 12, a hole 13b is made in the plate 13 through which the other end of the constant pressure spring support shaft 15 can be freely inserted and removed, and the constant pressure spring support shaft 15 is inserted into the hole 13b. Attach 17. A screw hole 1b is provided between the constant pressure spring support shaft 15 and the pressure adjustment screw shaft 14 of the left and right support bases 1, and a screw portion 16 is provided at one end.
Insert and fix the set shaft 16 provided with a. The plate 13 has a hole 1 into which the other end of the set shaft 16 can be inserted.
3c is drilled and inserted, and a head 16b is provided at the tip of the set shaft 16 to prevent the plate 13 from coming off.

As shown in FIG. 2, the support base 1 is integrally formed with a presser roller support portion 1A projecting upward at the center thereof, and is provided with a plurality of, for example, three, through holes 1a.
A cylindrical coil spring holder support 4b is inserted and fixed in the through hole 1a, and a cylindrical coil holder 4a with a coil spring 20 inserted inside is slidable inside the coil spring holder support 4b. , and one end of the coil holder 4a is fixed, for example, by welding, to a holder support member 11 formed by bending a plate into a U-shape. Holder support member 11
In the present invention, the holder support element member 1
It consists of 1A, 11B, and 11C.

The presser roller holder 10 has a groove-shaped cross section, and in the present invention, four presser rollers 5 are rotatably supported in the opening by a presser roller shaft 5-1. In the present invention, the presser roller holder 10 is mounted on rotating shafts 11-1 provided on three holder support element members 11A, 11B and 11C so as to be able to rotate to some extent. The hole of the rotating shaft 11-1 of the central holder support element member 11A is circular, and the holes of the holder support element members 11B and 11C are elongated so that they can be moved to the left and right to some extent.

The cable feeding device according to the present invention includes the first
As shown in the figure, a driving wheel 2 and a driven wheel 3 are placed on a support stand 1.
are held rotatably, and an endless belt 4 is wound between them. A plurality of presser rollers 5 are arranged between the driving wheel 2 and the driven wheel 3, and grip the towing rope 9' via the endless belt 4.
The cable 8 is sent out by rotating the endless belt 4 in the direction in which the cable 8 is sent out.

The presser roller 5 is rotatably supported by a presser roller holder 10, and the presser roller holder 10 is supported by a plurality of holder supports 11 so that the distance between the presser roller holders 10 can be freely changed to parallel or non-parallel. There is.

Further, the holder support member 11 is attached to the coil spring holder 4.
As shown in FIG. 2, the coil spring holder 4a is fitted movably in the direction of the press roller 5 in a holder support member 4b that is open in the direction of the press roller 5, and the coil spring 20 is fixed therein. is stored.

Therefore, with the coil spring holder support member 4b as a support, the contraction reaction force of the coil spring 20 pushes the coil spring holder 4a, and this force acts on the presser roller 5 via the holder support member 11 and the presser roller holder 10, and the presser roller The endless belts 4, which are sandwiched between the cables 5 and 5, are brought close to each other to grip the cable. When a passing object with a changing diameter enters between the endless belts 4, as shown in FIG. It slides and adjusts the widths of the pair of presser roller holders 10 to be non-parallel, so as not to reduce the contact area between the endless belt 4 and the passing object.

There are thread grooves 14a at both ends of the threaded shaft 14,
The constant pressure spring support shaft 15 is fitted into the screw groove 13a of the plate 13, and the constant pressure spring support shaft 15 is inserted into the shaft hole 13b of the plate 13.
Also, the set shaft 16 is inserted into the set shaft hole 1 of the plate 13.
3c, the plate 13 can be rotated to the base 12 by rotating the screw shaft 14.
It is now possible to approach or move away from.

The set shaft 16 has a screw groove 16a at its tip, and is engaged with the screw hole 1b of the support base 1, and by adjusting the distance between the support base 1 and the plate 13, the pair of disc springs 17 is compressed to a constant pressure region. When fixing to the support base 1 and releasing the grip on the cable 8 etc. located between the endless belts 4, the rotation of the screw shaft 14 causes the plate 13 to separate from the base 12, and the disc spring 17 returns to the initial set height. After returning to , support platform 1
are separated from each other together with the plate 13.

Disc spring 17 serving as a constant pressure spring that is a feature of the present invention
is movably attached to the constant pressure spring support shaft 15,
The plate 13 prevents the constant pressure spring from falling off the support shaft 15.

When the plate 13 is moved toward the base 12 by rotating the screw shaft 14, the support base 1 and the disc spring 1 are moved.
7 move toward the base 12, but at this time, if there is a cable 8 or the like between the endless belts 4, the support base 1 stops moving when it is gripped, and from then on, only the disk spring 17 continues to move. , the disc spring 17 will be compressed. At this time, since one side of the disc spring 17 is supported by the plate 13, the spring reaction force generated in the disc spring 17 is transmitted to the presser roller holder 10 via the support base 1, and is further transmitted to the presser roller holder 10, which is rotatably attached to the presser roller holder 10. The holding roller 5 provides a gripping force for gripping the cable 8 and the like via the endless belt 4.

Next, a method of using the cable feeding device according to the present invention will be described.

First, a torque wrench is inserted into the screw hole 14b provided on the end surface of the screw shaft 14, and the screw shaft 14 is rotated in one direction. As a result, the pair of plates 13 approach each other in the direction of the base 12, and the disc spring 17 and the support base 1 also approach each other in the direction of the base 12. As a result, the endless belts 4 on the support stand 1 also come close to each other, and the traction rope 9 is gripped between the endless belts 4. When the torque wrench is further rotated, the plates 13 approach each other in the direction of the base 12, but since the traction rope 9 is sandwiched between the endless belts 4, the support base 1 cannot move in the direction of the base 2, so the disc spring 17 compresses and generates a spring reaction force. Disc spring 1 by plate 13
7, all the spring reaction force generated here acts as a force pushing the support base 1, and this force becomes the gripping force of the tow rope 9.

A reaction force from the coil spring 20 in the coil spring holder 4a and coil spring holder support member 4b acts on the presser roller holder 10 that supports the presser roller 5 that holds the tow rope 9 between the endless belts 4. However, since the reaction forces of the coil spring 20 and the disc spring 17 are balanced through the support base 1, a grip pressure exceeding the rated reaction force of the disc spring 17 is not generated.

Next, as shown in FIG. 1, the drive wheel 2 is rotated and the endless belt 4 continuously sends out the towing rope 9 forward. After the towing rope 9 is sent out, when the twisted metal fittings 6, which are thicker than the towing rope 9, are inserted between the endless belts 4, the endless belts 4 are spread apart from each other by the twisted metal fittings 6. For this reason, the presser roller 5 receives pressure from this retwisting hardware 6, opens the presser roller holder 10 non-parallelly according to its diameter, puts the retwisting hardware 6 into the endless belt 4, and then the endless belt The untwisting hardware 6 is inserted between 4 and the presser roller holder 10 is opened in parallel. The coil spring 2 in each coil spring holder 4a and coil spring holder support member 4b is adjusted according to this opening amount.
0 is contracted, and the increase in the spring reaction force generated therein acts in the direction of increasing the distance between the support stands. This increase in spring reaction force is transmitted to the disc spring 17 through the support base 1 and attempts to move the disc spring 17 in the direction of the plate 13, but since the plate 13 is fixed by the thread groove 14a of the screw shaft 14, Trying to compress the disc spring 17. At this time, since the disc spring 17 is used in a nonlinear region where the spring reaction force does not change depending on the amount of displacement, the compression of the disc spring 17 widens the distance between the supports 1, and the previously compressed coil spring 0
By eliminating the amount of displacement, the incremental spring reaction force of the coil spring 20 generated in excess of the rated value of the disc spring 17 is released, and the coil spring 20 is continuously sent forward while keeping the gripping pressure on the twisting hardware 6 constant. Can be done.

After that, when the cable 8, which has a smaller diameter than the untwisting hardware 6, enters between the endless belt 4, the presser roller is pressed in the direction of the endless belt 4 by the coil spring 20 in the coil spring holder 4a and the coil spring holder support member 4b. The holder 10 is placed between the endless belts 4 so as to close non-parallelly according to the difference in their diameters and not to reduce the contact area between the endless belts 4 and the passing object. Furthermore, the cable advances and the endless belt 4
When held parallel to each other, each coil spring holder 4a,
The coil spring 20 in the coil spring holder support member 4b expands, and the spring reaction force decreases. As a result, the balance between the reaction force of the coil spring and the reaction force of the constant pressure spring, which were balanced through the support base 1, is lost, and the disc spring 17 pushes the support base 1 until these reaction forces are balanced, and the support base 1 Although the mutual spacing is made close, since the disc spring 17 is used in a nonlinear region where the spring reaction force does not change depending on the amount of displacement, the coil spring 20
The support base 1 moves by the amount of elongation, and the cable can be continuously sent forward while keeping the gripping pressure constant.

In the above description, the presser roller holder 10
The purpose is to connect cables 8 of different diameters between the endless belt 4.
This is for smoothly pulling in and sending out items such as the like.

Effects of the invention According to the invention, a pair of support stands provided with a presser roller rotatably attached to a presser roller holder are installed so as to be movable perpendicularly to the cable feeding direction, and the support stands are attached to a disc spring. By supporting the cable through the support base, it is possible to approach or separate the support base while gripping the cable with constant pressure.

Therefore, by simply adjusting the belt spacing of the endless belt to the spacing of the towing rope, work can be continued without interruption even when twisting hardware, pulling eyes, cables, etc. of different diameters pass through the feeding device. You can also send it to

As a result, anyone can perform the cable installation work without any skill, and the time required for cable installation can be significantly reduced.

[Brief explanation of drawings]

Fig. 1 is a plan view of the cable feeding device according to the present invention, Fig. 2 is a sectional view of half of the cross-sectional view taken along the line X-Y in Fig. 1, viewed from the direction of the arrow, and Fig. 3 is the cable feeding device related to the present invention. An exploded perspective view of the main parts of
Figure 4 is a plan view of a conventional cable feeding device.
shows. 1: Support base, 1A: Presser roller support section, 2: Drive wheel, 3: Driven wheel, 4a: Coil spring holder, 4
b: Supporting member for coil spring holder, 5: Pressing roller, 6: Retwisting hardware, 7: Connecting fittings, 8: Cable, 9: Towing rope, 10... Pressing roller holder, 11: Supporting member for holder, 11-1 : Rotating shaft, 12: Base, 13: Plate, 14: Pressure adjustment screw shaft, 15: Constant pressure spring support shaft, 16: Set shaft, 16a: Threaded part, 17: Belleville spring, 1a,
1b,: hole, 1c, 12b, 13a: screw hole, 1
2b: screw hole, 13a: screw hole, 14a: threaded portion, 14b: wrench hole.

Claims (1)

[Scope of utility model registration request] A pair of support stands are provided at both ends of which the drive wheel and the follower wheel are rotatably supported, and the widths of the support stands can be changed perpendicularly to the cable feeding direction while remaining parallel to each other. An endless belt is installed between the driving wheels, and a plurality of pressing rollers are rotatably disposed inside opposing portions of the endless belts that are close to each other and clamp the cable, and the endless belt is biased in the direction of clamping the cable. In the cable feeding device in which the presser roller is configured such that the pair of support stands are provided with a presser roller support portion integrally projecting upward at the upper center thereof, and a plurality of coil spring holder support members are provided on the presser roller support portion. A presser roller holder, which is fixed and has a plurality of presser rollers rotatably attached thereto, is slidably movable by providing an elastic body in the plurality of coil spring holder support members and swings in the above direction about a central coil spring holder support member. The cable feeding device is configured such that the support base is supported via a constant pressure spring having a non-linear region in which the spring reaction force does not change depending on the amount of displacement.