JPH04208016A - Cable layer - Google Patents

Abstract

PURPOSE:To improve safety in work and reduce manhour by so constituting it as to positively and automatically veer out a cable in the direction of reducing the tensile strength added to the cable inside a cable tray. CONSTITUTION:When tensile strength is added to a cable 7 manually, a tension detecting means 40 detects the magnitude of the tensile strength added to the cable 7. A control means controls the rotation of a driving means 50 in the direction of reducing the detected tension value, and sends out the cable automatically with a sending roller 20. Accordingly, if these devices 100 are installed at the proper place inside a cable tray 1 by the number proper to easily draw out the cable with, for example, one worker taking the shape of the cable tray 1, etc., into consideration, the cable 7 can be laid inside the cable tray 1 with minute force quickly without compulsion. Hereby, the manhour can be reduced, and the safety in work improves.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cable laying device used for laying cables in a cable tray.

[Prior Art] Conventionally, when laying cables in trays at various construction sites, the cables are manually pulled out from a cable drum and guided into a lay with a complicated route shape.

However, in such a conventional method, since the cable drum around which the cable is wound is heavy, its rotational frictional resistance is excessive, and the cable cannot be pulled out unless a considerable tensile force is applied. I can't do anything.

Therefore, the labor required by the workers is large, and in many cases, a plurality of workers (for example, 10 Å or more) are required just to obtain the tensile force. This poor work efficiency causes delays in the construction period and increases installation costs. In addition, since the rotational frictional resistance force changes statically and dynamically depending on the case, there is a problem of danger depending on the scaffolding conditions.

In particular, since cable trays are installed in high places or underground, and their shapes are complex with many curved parts, simply adding more workers is not enough to ensure that the cables can be pulled out smoothly along the cable tray. Not only is it impossible to guide the cable, but it also damages the cable as it is pulled over the cable tray.

The present invention has been made in view of the above circumstances, and its purpose is to automatically feed out cables so as to reduce the tension applied to the cables in the cable tray, regardless of whether the cables are in curved or straight sections, thereby saving labor and man-hours. The purpose of the present invention is to provide a cable installation device that can ensure a reduction in traffic and work safety.

C Means for Solving the Problem J The present invention is based on the arbitrary rotational frictional resistance of the cable drum, due to the above-mentioned conventional problems or the fact that the outer diameter, weight, and amount of winding of the cable are different. We analyzed that this was due to the fact that the drag force was ignored, the shape of the cable tray was ignored, and the pulling and guiding was done simply by adding human power to overcome this force. Regardless, the above object is achieved by actively sending out the cables from the cable drum side at appropriate locations on the cable tray.

That is, a main body (10) formed to be detachably attached to the cable tray (1), a feed roller (20) rotatably attached to this main body (10), and this feed roller (20)
drive means (3) for rotating the cable (7) in the sending direction of the cable (7).
0), a tension detection means (40) for detecting the tension applied to the cable (7) in the cable tray (1) engaged with the feed roller (20), and control means (50) for controlling the rotation of the drive means (30) so that the feed roller (20) rotates in a direction that reduces the tension of the cable (7) based on the tension value; ) is rotatably supported at its base end and has a pair of guide rollers (43) and (44) at its distal end. It is characterized in that it is formed to include biasing means (42A>, (42B)) that allow tilting rotation.

[Function] According to the present invention, when a tensile force is applied to the cable (7) by human power, the tension detection means (40) detects the magnitude of the tensile force applied to the cable (7>).

Then, the control means rotates the drive means (50) in a direction to decrease the detected tension value, and rotates the feed roller (20).
automatically sends out the cable (7).

Therefore, the control means (50) should be controlled by one worker, taking into consideration the shape of the cable tray (1), etc.
7) A reasonable number of devices (100) that can be easily drawn out.
If the cable (7) is installed in the proper place in the cable tray (1), the cable (7) can be easily and quickly removed from the cable tray (1) with a slight force.
).

Moreover, since the tension detection means (40) can be tilted and rotated in both directions from the neutral position, it can be applied even if the cable tray (1) is bent in any direction or in a straight shape.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the cable laying apparatus 100 is roughly divided into a main body 10, a feed roller 20, and a drive means 3.
0, tension detection means 40, and control means 50,
The cable tray 1 is configured to actively and automatically feed out the cable 7 in a direction that reduces the tension F applied to the cable 7.

First, the main body 10 has a locking portion 11, as shown in FIG.
Plane portion 12. The stop part 11 is fitted into the side wall 4 of the cable 1 to the lay 1, and can be attached to and removed from the cable tray 1 by means of a knife. A plurality of tightening holes 1-15 are provided for secure locking. Because of the cantilever locking, the cable 7 after tension can be easily removed and placed on the cable tray 1. Further, the flat part 12 is provided in a direction in which it is located inside the cable tray 1 when the main body 10 is attached to the cable tray 1, and the kite part 13 abuts and engages with the inner surface of the side wall 4 to stabilize the posture. It has been established as a means of achieving this goal.

Further, the feed roller 20 is a means for applying a feed force to the cable 7 with which it is engaged, and is rotatably mounted on the main body 10 (plane portion 12). This feed roller 20 is provided with a kite 20a for preventing the cable 7 from flying out, which rotates synchronously. In order to smoothly exert the feeding force, the pressure roller 2
5 are arranged facing each other. Like the feed roller 20, the pressure roller 25 is made of hard rubber that allows a certain degree of elastic deformation, and is rotatably mounted on the slider 28. This pressing roller 25 (slider 28) is
It is slidably attached to a kite rod 29 supported by the main body 10, and is movable in the vertical direction in FIG.

Here, the pressing force adjustment means may be configured by a spring biasing method or the like. A pneumatic system is used to avoid narrowing the range.

That is, as shown in FIG. 2, the pressing force adjustment means includes a biasing cylinder device 26 fixed to the piston rod 26a or the slider 28, and a pressurizing cylinder device 27 (operating lever) that applies a desired air pressure to the cylinder device 26. 27
L).

In addition, 53a is a check valve for keeping the pressing force constant;
In b, the on-off valve 153c is a compressed air source.

Therefore, when the operating lever 27L is operated, the slider 28 moves to apply a desired pressing force to the cable 7 interposed between the feed roller 20 and the pressure roller 25, and the cable 7 is moved by the feed roller 20. It is possible to set the necessary and sufficient frictional force for smooth delivery.

That is, when air pressure is sent to cylinder chamber C through boats A and B, the air in the cylinder chamber escapes through boats E and F, causing the piston rod 26a to move to the right in FIG. When air is sent to the cylinder chamber C, the air in the cylinder chamber C or the boat 1. , I, so that the rod 26a can be moved to the left.

Now, the feeding control of the cable 7 in the direction indicated by the upward arrow Y in FIG. In this embodiment, the drive means 30 is formed from an air motor 33 and a rotating shaft 31 connecting the air motor 33 and the feed roller 20. For this purpose, the control means 50 controls the air motor 3
3, a control valve 52 interposed in the middle of the pipe 53, and a drive shaft 51 that adjusts the opening degree of the control valve 52. The purpose of using the air motor 33 is to withstand locking on the load side and to notify of work abnormalities due to the air front.

On the other hand, the tension detection means 40 is composed of a detection arm 41 rotatably supported by the flat part 12 of the main body 10, and a pair of springs 42A and 42B, which serve as biasing flat membranes. Position (state shown by solid line in Figure 1)
The tension force F1 or F2 applied to the cable 7 is detected by the rotation angle of the detection arm 41 in both directions.

That is, the detection arm 41 is connected to the drive shaft 51 and rotatably supported by the planar protrusion 12A of the main body 10. Further, both springs 42A, 42B are connected to the pull-out portions 41A, 41
B and the main body 10 (12) as a partition. Therefore, in an unloaded state, the detection arm 41 is in a neutral position due to the uniform urging force of the springs 42A and 42B, and the detection arm 41 is in a neutral position due to the uniform biasing force of the springs 42A and 42B, and the detection arm 41 is in a neutral position due to the uniform biasing force of the springs 42A and 42B.
When 2+ is applied, tilt rotation can be made in both directions shown by the dotted line or the two-dot chain line.

Further, a pair of guide rollers 43 and 44 are provided at the tip of the detection arm 41 to facilitate guiding the cable 7, and a lid member 48 is provided to prevent the cable 7 from slipping off.

In the present embodiment shown in FIG. 1, the lid member 48 is formed from a flange member having a larger diameter fixed to the one-sided force roller 44, but it may also be of the opening/closing door type shown in FIG. 3, for example. I can do it.

Here, the coupling relationship of each means 30, 40, 50 is determined by the tension applied to the cable 7 (arrow Fl shown in FIG. 1).

When F2) increases, the detection arm 41 moves along the arrows θ1 and θ.
It is selected that the control valve 52 is rotated in two directions and the opening of the control valve 52 is adjusted in the direction of reducing tension by rotating the drive shaft 51 by the rotation angle. Therefore, when tension F1 is applied to the cable 7, the detection arm 41 rotates in the θ1 direction against the biasing force of the spring 42A, and controls the rotation of the feed roller 20 in the cable feeding direction to actively and automatically move the cable 7. send out to target. Then, the tension F1 applied to the cable 7 decreases, so the detection arm 41
The rotation angle θ1 becomes smaller, and the rotational speed of the feed roller 20 decreases. In addition, the detection arm 41 or the stopper 17A
, t or 17B, the control valve 52 is fully closed and the air motor 33 is stopped.

Next, the operation of this embodiment will be explained.

Consider the case where the cable 7 is laid within the cable tray 1 (straight section 21 curved section 3) shown in FIG.

First, the present cable laying device 100 is attached to each curved portion 3 (sections ■ to ■). Also, the device 1 is installed on the long straight section 2 (between ■ and ■).
Install 00'. That is, the locking portion 11 of the main body 10 is fitted into the side wall 4 of the cable tray 1, and the tightening bolt 15 is inserted into the side wall 4 of the cable tray 1.
Install securely. Along with each outfit ff1oo,
The pressing force of the pressing roller 25 is adjusted by operating the operating lever 27L.

Next, the cable 7 is attached to the tip of the cable 7 wound around the cable drum (not shown) disposed on the part ■ side of FIG.
Tie a metsenger wire 7' with a diameter smaller than that of
This Metsenger wire 7' is passed between the inner rollers 20 and 25 of each device 100 and pulled out along the cable tray 1, and the small diameter, lightweight and forceless Metsenger wire 7' is preliminarily laid. It is extremely easy to work with. However, for lightweight cables, it may be pulled directly.

After that, when the operator pulls the Messenger wire 7' at 0 part, a certain tension is applied to the wire 7'. Then, first, the tension detection means 40 of the device f100 disposed in the 0 section is activated, and the control means 50. The feed roller 20 rotates under the cooperation of the drive means 30. Sequential ■, ■～■
The feed rollers 20 at the intervals, ■, and ■ also rotate. However, since the metsenger wire 7' has a smaller diameter than the cable 7, the operation of these (the main shock ff100' between Guide a! The original function of sending out the cable 7 is not performed.

Here, both rollers 20 of the device 100 attached to part
．． When the tip of the cable 7 pulled out from the cable drum is inserted between the tension detection means 40. Control means 50. The feed roller 20 is rotated by the cooperation of the driving means 30, and the cable 7 is automatically fed out in the Y1 direction.

Therefore, the operator can pull the Messenger wire 7' with a light and weak tension at the 0 part. In this way, the cable 7 sent out next advances in the X1 direction and is sent out in the Y2 direction by the device 100 attached to the 0th section. The slack between (1) and (2) is eliminated by the device 100'.

After that, it is sent out in the same way in the X2 direction and the Y3 direction.

Therefore, by pulling the messenger wire 7' or the cable 7 at the 0 position, the operator can smoothly lay the cable 7, which has a large diameter and is heavy, into the complicatedly shaped cable tray 1 with a slight pulling force. Slider 28 after cable installation
Slide to remove cable 7 and lay the next cable. After all cables are laid, connect each wooden ztoo, io
o' is removed from cables l-1 and aI.

Furthermore, the cable can be laid without using the Mensen wire 7' by moving the tip of the cable by sliding the slider of each device 100 and passing it between the rollers 20 and 25.

According to this solid line example, the main body 10 of the device 100 is
．． Feed roller 20. Drive means 30. Tension detection means 40.
It is composed of a control means 50, etc., and is removable from the cable tray 1, and is configured to actively and automatically send out the cable 7 engaged with the feed roller 20 so as to reduce the tension F applied to the cable 7 when attached. Therefore, regardless of the diameter and weight of the cable 7 and the complicated shape of the cable tray 1, the cable can be laid smoothly with a light and weak tensile force without damaging the cable 7. Therefore, it is possible to reduce labor and man-hours and achieve quick installation work at low cost.

Further, the tension detection means 40 includes a detection arm 41 and a pair of springs 42A and 42B, and is in the neutral position shown in FIG. 1 in an unloaded state, where the tension force Fl is reached.

Since it is possible to tilt and rotate with respect to any of F2, the fourth
It can also be used in the straight portion of the cable tray 1 as shown in the figure FItlOO'.

Further, since a pair of guide rollers 43 and 44 are provided at the tip of the detection arm 41 forming the tension detection means 40, the direction change and delivery guidance at the bend 3 of the cable 7 can be smoothly performed. 11 member 48 further promotes this effect.

Further, the pressing roller 25 has pressing force adjusting means (26, 27
, 28, 29) so that the relative position to the feed roller 20 can be varied and the pressing force on the cable 7 can be adjusted, so even if the outer diameter of the cable 7 changes, a reasonable feeding force can be generated. It is possible and has wide adaptability.

Further, since the locking portion 11 of the main body 10 is shaped to be conveniently fitted to the side wall 4 of the cable tray 1, quick work is ensured also from this point of view.

In the above embodiments, the driving means 30 is an air motor type, the control means 50 is a control valve type, and the tension detecting means 40 is a single detection lever type.
These are not limited to the ranges exemplified above. For example, it can be implemented using a servo motor system.

Further, the detection arm 41 of the tension detection means 40 was arranged approximately in the center of the main body 10 (plane portion 12) as shown in FIG. 1, or eccentrically arranged as shown in FIG. In this way, by forming the detection arm 41 with two members 411 and 412, the curved portion 7a of the cable 7 itself can be used as a part of the detection arm 41. Groove 4 is provided in the 0 member 411 which can also be placed on the 0 member 411 for smooth cable installation.
1a is attached to the member 412 with the bolt 42b.
It would be even more convenient if the length of 1 could be made variable.

Note that FIG. 5(A) shows the state before the feed roller 25 is sent out;
(B) shows the case where the tension is reduced by tilting and rotating the detection arm 41. Also, 200 is a retaining means that includes a retaining roller 201 and is detachably attached to the cable tray 1, and is mainly used for the device. 100 and the straight section 2 of the cable tray 1
It is used in the installation of cables.

[Effects of the Invention] The present invention comprises a main body that can be attached to and removed from a cable tray, a feed roller attached to this main body, a driving means, a tension detection means, and a control means, and the tension detection means is tiltable in both directions. The cable is configured to actively and automatically feed out the cable in a direction that reduces the tensile force applied to the cable within the cable tray, which greatly reduces labor and man-hours while ensuring work safety without causing damage to the cable. It is possible to provide a cable installation device that can install cables. It also functions effectively in straight sections within cable trays.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the present invention, FIG. 2 is a view for explaining the pressing force adjustment means, FIG. 3 is a view showing a modification of the lid member, and FIG. 4 is a diagram showing the installation work. The explanatory diagram and FIG. 5 are diagrams showing a modification of the present device. DESCRIPTION OF SYMBOLS 1... Cable tray, 2... Straight part, 3... Curved part, 4... Side wall, 7... Cable, 7'... Metsenger wire, 10... Main body, 11. ...Locking part, 12...Flat part, 13...Guide part, 15...Tightening bolt, 17...Stopper, 20...Feed roller, 21...Horizontal roller, 25... ...Press roller, 26...Cylinder device for urging, 26a...Piston rod, 27...Cylinder device for pressurization, 27L...Operation lever, 28...Slider, two...Guides Rod, 30... Drive means, 31... Rotating shaft, 33... Air motor, 40... Tension detection means, 41... Detection arm, 42A, 42B... Spring (biasing means), 43.44・
... Guide roller, 48 ... Lid member, 50 ... Control means, 51 ... Drive shaft, 52 ... Control valve, 53 ... Piping, 53a ... Check valve, 53b ...・Air source, 100...Cable installation! . Applicant Toshiba Plant Construction Co., Ltd. Agent Patent Attorney Etsuo Nagashima Figure 5

Claims (1)

[Claims] (1) A main body (10) removably formed on the cable tray (1), a feed roller (20) rotatably attached to the main body (10), and a cable (7) that connects the feed roller (20) to the main body (10). ) in the delivery direction (30)
and a cable tray (
A tension detection means (40) detects the tension applied to the cable (7) in the cable (1), and a feed roller (20) moves the cable (
control means (50) for rotationally controlling the driving means (30) so as to rotate in a direction that reduces the tension of the tension detecting means (40); a detection arm (41) provided with guide rollers (43) and (44); a biasing means (42A) for holding the detection arm (41) in a neutral position and allowing bidirectional tilting rotation; (42B) A cable laying device characterized by comprising: (42B).