JPH0670421A - Method for laying cable - Google Patents

Abstract

PURPOSE:To lay a cable in a cable tray swiftly with less power by moving the cable by pulling only between a laying device and another. CONSTITUTION:A plurality of laying devices 100 and 100' are fitted to the curved parts 3 and the straight parts 2 of a cable tray l at intervals. Next, the tip side of a cable 7 is set on the feed roller 20 of a laying device 100 put in front, and it is also set on the guide rollers 43 and 44 of a detection arm 41. After that, the tip is carried on the shoulder and moved by pulling as far as a laying device 100' put in the rear. Then, a tension detecting means in the front laying device 100 operates, and on the basis of its tension value detected the feed roller 20 rotates in a direction of reducing drawing-out side tension, and the cable 7 is fed nut in the direction of the rear laying device 100'. Accordingly, a worker has only to move the cable by pulling only between the laying devices 100 and 100'. Consequently it becomes possible to lay the cable 7 in a cable tray 1 with less power swiftly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable laying method which allows a cable to be quickly laid in a cable tray using a laying device with a light force.

[0002]

2. Description of the Related Art Conventionally, when laying a cable in a cable tray at various construction and construction sites, the cable is pulled out manually from a cable drum and guided in a cable tray having a complicated route shape. .

[0003]

However, in such a conventional laying method, since the cable drum around which the cable is wound has a high weight, the rotational frictional resistance force thereof is excessive, and the cable must be applied with a considerably large tensile force. I can't withdraw.

Therefore, in many cases, the labor of the worker is large and a plurality of workers (for example, 10 or more) are required only to obtain the pulling force. Since the work efficiency is poor in this way, it is one of the factors that delay the construction period and raises the installation cost. In addition, since the rotational frictional resistance force changes statically-dynamically depending on the case, there is a problem with danger due to scaffolding conditions.

In particular, since the cable tray is arranged in a high place, underground, etc., its shape is complicated and has many curved portions. Therefore, simply increasing the number of workers will cause the cables to run along the cable tray. Not only can the guide be pulled out smoothly, but also the cable is damaged because it is dragged on the cable tray.

The present invention has been made in view of the above circumstances, and an object thereof is to bend a curved portion by simply pulling the tip of a cable.
It is an object of the present invention to provide a cable laying method capable of quickly and lightly laying a cable in a cable tray regardless of a straight line portion, thereby reducing labor and man-hours and ensuring work safety.

[0007]

A cable laying method according to the present invention includes a tension detecting means for detecting a tension in a pulling direction of a cable engaged with a guide roller of a detecting arm, and the detected tension value is Based on this, a plurality of laying devices formed so as to rotate the feed roller to feed the cable engaged with the feed roller and reduce the tension on the pull-out side of the cable are attached at intervals in the longitudinal direction of the cable tray. The tip side of the cable is engaged with the feed roller in the front laying device, and then the tip end is carried and pulled and moved to the rear laying device, and then the front end side of the cable is fed in the rear laying device. It is characterized in that the tip of the cable is carried and moved to the next laying device by repeating the engagement with the roller to lay the cable in the cable tray.

[0008]

According to the present invention having the above-described structure, a plurality of laying devices are attached to arbitrarily selected curved portions or straight portions of the cable tray at appropriately determined intervals, and the tip end side of the cable is the first (front) side. After being engaged with the feed roller of the placement device and the guide roller of the detection arm, the tip end is carried and pulled to the second (post-installation) device. Then, the tension detecting means in the first laying device operates, and the feed roller is rotated in the direction of decreasing the pull-out side tension based on the tension value. That is, the cable is sent out toward the second installation device. Therefore, the operator can pull and move the cable with a light force.

When the second (rear) laying device is reached, the tip of the cable is engaged with the second (front) feed roller and the guide roller, as in the first case. Then, while carrying the tip of the cable, the cable is pulled and moved to the third (post) installation device. Hereinafter, similarly, the same procedure is repeated for the fourth, fifth, ...

Therefore, the operator only has to pull and move only the cable between the laying devices and the cable is automatically sent out by the laying device in front of the laying device. Cables can be quickly laid in the cable tray just by pulling. Moreover, the operator need only carry the tip of the cable. In other words, it is not necessary for the operator to carry the cable in the middle of the cable, so that one person can lay the cable.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 3 to 5 show a laying apparatus 100 suitable for carrying out the method for laying the present cable. This installation device 100
Are roughly classified into a main body 10, a feed roller 20, and a driving means 30.
And a tension detecting means 40 and a control means 50, which are configured to positively and automatically send the cable 7 in a direction to reduce the tension F (F1, F2) applied to the cable 7 in the cable tray 1. Has been done.

First, the main body 10 comprises a locking portion 11, a flat surface portion 12 and a guide portion 13 as shown in FIG. 3, and by fitting the locking portion 11 into the side wall 4 of the cable tray 1,
It can be attached to and detached from the cable tray 1. A plurality of tightening bolts 15 are provided for positive locking. Due to the cantilevered locking, the cable 7 after being pulled can be easily removed and placed on the cable tray 1.

The flat portion 12 is provided in a direction in which it is positioned inside the cable tray 1 when the main body 10 is attached to the cable tray 1, and the guide portion 13 abuts and engages with the inner surface of the side wall 4. It is provided for stabilization.

The feed roller 20 is a means for applying a feed force to the engaging cable 7, and is rotatably mounted on the main body 10 (flat surface portion 12). The feed roller 20 is provided with a guide 20a for preventing the cable 7 that rotates in synchronization from jumping out. The pressing rollers 25 are arranged opposite to each other so that the feeding force is smoothly exerted.

The pressing roller 25 is made of hard rubber that allows a certain elastic deformation, like the feed roller 20, and is rotatably mounted on the slider 28. The pressure roller 25 (slider 28) is
Is slidably mounted on a guide rod 29 supported by
By the pressing force adjusting means including the cylinder device 26 and the like,
It is movable in the vertical direction in FIG.

Here, the pressing force adjusting means may be constituted by a spring biasing system or the like, but in this embodiment, a pressing force which is necessary and sufficient can be applied and a pressing force generated in the case of the spring biasing system. The pneumatic system is used to avoid narrowing the pressure adjustment range. That is, as shown in FIG. 4, the pressing force adjusting means includes a biasing cylinder device 26 in which a piston rod 26a is fixed to a slider 28, and a pressurizing cylinder device 27 for applying a desired air pressure to the cylinder device 26.
(Operation lever 27L). Incidentally, 53a is a check valve for keeping the pressing force constant, 53b is an opening / closing valve, 53c.
Is the source of compressed air.

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 feeding roller 20 and the pressing roller 25, and the feeding roller 20 causes the cable 7 to move. It is possible to set a necessary and sufficient frictional force for smoothly sending out.

That is, when air pressure is sent to the cylinder chamber C through the ports A and B, the air in the cylinder chamber D escapes through the ports E and F, so that the piston rod 26a moves to the right in FIG. On the other hand, when air is sent to the cylinder chamber D through the ports G and H, the air in the cylinder chamber C escapes through the ports I and J, so that the rod 26a can be moved to the left.

Now, the feeding control of the cable 7 in the direction shown by the arrow Y in FIG. 3 is carried out by the feeding roller 20 and the driving means 3.
0, the tension detecting means 40, and the control means 50 cooperate with each other. In this embodiment, the driving means 30 includes an air motor 33 and a rotary shaft 31 connecting the air motor 33 and the feed roller 20.
It is formed from and.

For this reason, the control means 50, as shown in FIG. 4, is a pipe 53 for supplying compressed air to the air motor 33.
And a control valve 52 interposed in the middle of the pipe 53, and a drive shaft 51 for adjusting the opening degree of the control valve 52. The reason why the air motor 33 is used is that the air motor 33 can withstand the lock on the load side and can notify an abnormal work due to air noise.

On the other hand, as shown in FIG. 3, the tension detecting means 40 comprises a detecting arm 41 which is rotatably supported by the flat surface portion 12 of the main body 10 and a pair of springs 42A and 42B which are biasing means. The tension F applied to the cable 7 by the bidirectional rotation angle of the detection arm 41 from the neutral position (the state shown by the solid line in FIG. 3) that is position-regulated by 42A and 42B.
It is formed to detect 1 or F2.

That is, the detection arm 41 is connected to the drive shaft 51 and is rotatably supported by the plane projection 12A of the main body 10. Further, both springs 42A and 42B are stretched over the lead-out portions 41A and 41B and the main body 10 (12) in a distributed manner. Therefore, the detection arm 41 is in the neutral position by the uniform biasing force of the springs 42A and 42B in the unloaded state, and the pulling force (F
When 1 or F2) is added, it can be tilted and rotated in both directions shown by a dotted line or a two-dot chain line.

At the tip of the detection arm 41, a pair of guide rollers 43,
44 is provided, and a lid member 48 is provided to prevent the cable 7 from departing. The lid member 48 is shown in FIG.
In the present embodiment shown in FIG. 5, a flange member having a larger diameter than that fixed to the one guide roller 44 is used.
The door may be of the open / close door type shown in.

Here, the connection relationship between the respective means 30, 40, 50 is defined by the tension applied to the cable 7 (arrow F1, shown in FIG. 3).
When F2) increases, the detection arm 41 moves to the directions of arrows θ1 and θ.
It is selected that the control valve 52 is rotated in two directions and the drive shaft 51 is rotated by the rotation angle to adjust the opening degree of the control valve 52 in the direction to reduce the tension.

Therefore, when the tension F1 is applied to the cable 7, the detection arm 41 resists the biasing force of the spring 42A by θ.
The cable 7 is rotated in one direction and the feed roller 20 is rotationally controlled in the cable feed direction to positively and automatically feed the cable 7.
Then, since the tension F1 applied to the cable 7 decreases,
The rotation angle θ1 of the detection arm 41 decreases, and the rotation speed of the feed roller 20 decreases.

The control valve 52 is fully closed and the air motor 33 is stopped when the detection arm 41 is positionally restrained by the stopper 17A or 17B.

In the description of FIG. 3, the laying device 100 is mainly attached to the curved portion 3 of the cable tray 1. However, as shown in FIG. The form of the detection arm 41 may be changed. In other words, it is sufficient to have an eccentric arrangement.

That is, in FIG. 2, the detection arm 41 is
The holding portion 41 having the base portion 412 held by the springs 41A and 41B in the neutral position and the guide rollers 43 and 44.
1 and by tightening with the bolt 41b through the adjustment groove 41a of the holding portion 411, the vertical position of the guide rollers 43 and 44 in FIG. 2A can be adjusted. Since the bent portion 7a itself formed in a part of the cable 7 can also be used as a part of the detection arm 41, the tension of the cable 7 can be reliably detected, and the cable 7 can be arranged in the straight portion 2 to smoothly lay the cable.

Note that FIG. 2A shows the state before the feeding of the cable 7 by the feeding roller 20. Alternatively, the detection arm 41
Shows the case where the tilt rotation is performed, and the tension is thereby reduced. Further, (B) shows the case where the detection arm 41 tilts and rotates to reduce the tension. In addition, 200 is a drawing roller 2
01 is a detachable means that is detachably attached to the cable tray 1, and mainly includes the device 100 and the cable tray 1.
It is used for laying in the straight section 2.

Next, a method of laying the cable 7 using the laying apparatus 100 will be described. Consider a case where the cable 7 is laid in the cable tray 1 (straight line portion 2, curved portion 3) shown in FIG. First, the laying apparatus 100 is attached to each of the bending portions 3 (sections to sections). Further, the laying device 100 'is also attached to the long straight line portion 2 (between-). That is, the locking portion 11 of the main body 10 is fitted on the side wall 4 of the cable tray 1 and securely attached by the tightening bolt 15. At the same time, the operation lever 27L of each device 100 is operated to push the pressing roller 2L.
Adjust the pressing force of 5.

Next, the tip of the cable 7 wound around a cable drum (not shown) arranged on the side of FIG.
It is pulled out in one direction, and its front end side is passed through both rollers 20, 25 of the installation device 100 in front mounted on the curved portion 3 (part) of the cable tray 1 to engage with the feed roller 20, and further The guide rollers 43 and 44 are engaged.
The installation posture of the laying apparatus 100 is exactly the same as the state in which FIG. 3 is rotated clockwise by 90 degrees.

After that, the operator pulls and moves to the rear laying apparatus 100 side (X1 direction) mounted on the curved portion 3 (part) while carrying the tip of the cable 7. Bent part 3 (part)
A constant tension is applied to the cable 7 pulled out from the front installation device 100 attached to the.

Then, the tension detecting means 40 of the laying apparatus 100 at the front (part) is activated, and the control means 50 and the driving means 3 are operated.
The feed roller 20 rotates under the cooperation of zero. Therefore, the cable 7 is positively and automatically sent out in the X1 direction. That is, the operator can pull and move with a light force while carrying the tip of the cable 7.

In the rear (part) laying apparatus 100, similarly, the front end side of the cable 7 is engaged with the feed roller 20 and the guide rollers 43 and 44, and the operator holds the front end and bends. It is pulled and moved to part 3 (part). In this case, the laying device 100 attached to the bending part 3 (part)
And the laying device 100 attached to the curved part 3 (part) work together to keep the tension of the cable 7 constant.
Therefore, the worker can move in the Y2 direction with the same light force as when pulling in the X1 direction.

The slack of the cable 7 in the straight portion (between) is eliminated by the laying device 100 '. The device 1
The detention means 200 may be used instead of 00 '. Alternatively, the device 100 ′ and the detention means 200 may be installed together.

Hereinafter, the curved portion 3 (part) and the curved portion 3 (
With respect to the laying apparatus 100 attached to the section, the cable 7 may be pulled and moved in the X2 direction and the Y3 direction while engaging the cable 7 in the same procedure.

Therefore, the operator carries the tip of the cable 7 pulled out from the cable drum of the section, and the laying devices 10 attached to the sections, ...
If the cable is engaged with 0, 100, 100 ', 100, 100 and is pulled and moved in the Y1, X1, Y2, X2, and Y3 directions, even a large-diameter and heavy-weight cable 7 can be placed in the complicated cable tray 1. Can be laid quickly and smoothly with a light pulling force.

After laying the cables, the slider 28 is slid to remove the cables 7, and the next cable laying is carried out.
0'is removed from the cable tray 1.

According to this embodiment, however, the tension detecting means 40 for detecting the tension in the pulling direction of the cable 7 engaged with the guide rollers 43 and 44 of the detecting arm 41 is included, and the detected tension value is On the basis of the rotation of the feed roller 20, the plurality of laying devices 100 formed so as to reduce the tension on the pull-out side of the cable 7 while feeding the cable engaged with the feed roller 20 are spaced in the longitudinal direction of the cable tray 1. Is attached, and the distal end side of the cable 7 is engaged with the feed roller 20 in the front installation device 100 and then pulled and moved to the rear installation device 100 while carrying the tip thereof.
After that, the tip side of the cable 7 is attached to the rear installation device 1
This is a method of laying the cable in the cable tray 1 by repeatedly carrying the end of the cable 7 to the next laying device 100 by repeatedly engaging with the feed roller 20 in 00, so that the operator can put the end of the cable 7 in the cable tray 1. The diameter and weight of the cable 7 as well as the cable tray 1 can be obtained only by carrying the cable and pulling it while engaging with each laying device 100 (100 ') on the way.
Despite the complicated shape, the cable 7 can be laid with light force, quickly and smoothly without damaging the cable 7. Therefore, it is possible to reduce labor and man-hours and achieve quick installation work at low cost.

The tension detecting means 40 is composed of the detecting arm 4
1 and the pair of springs 42A and 42B, the neutral position shown in FIG. 3 is obtained in an unloaded state, and the tilted rotation is possible with respect to both tensile forces F1 and F2. It can also be used for the straight portion 2 of the tray 1.

A pair of guide rollers 43, 44 is provided at the tip of the detection arm 41 forming the tension detecting means 40.
Is provided, it is possible to smoothly change the direction of the curved portion 3 of the cable 7 and guide the delivery. The lid member 48 further promotes this effect.

The pressing roller 25 is formed so that the relative position to the feed roller 20 can be varied by the pressing force adjusting means (26, 27, 28, 29) to adjust the pressing force to the cable 7. Even if the outer diameter of the cable 7 changes, a proper feed force can be generated, and the adaptability is wide.

Furthermore, since the locking portion 11 of the main body 10 is shaped so as to be easily fitted to the side wall 4 of the cable tray 1, quick work can be assured from this point as well.

In the above embodiment, the drive means 30 is of the air motor type, the control means 50 is of the control valve type, and the tension detecting means 40 is of the detecting lever type. However, these are not limited to the above-mentioned range. For example, it can be implemented as a servo motor system.

[0045]

According to the present invention, the feed roller is rotated based on the detected tension value, including the tension detecting means for detecting the tension in the pull-out direction of the cable engaged with the guide roller of the detection arm. A plurality of laying devices formed to reduce the tension on the cable pull-out side while sending out the cable engaged with the feed roller are attached at intervals in the longitudinal direction of the cable tray, and the leading end side of the cable is laid in front. After engaging the feed roller in the device, pulling and moving it to the rear installation device while carrying the tip, and then repeatedly engaging the tip side of the cable with the feed roller in the rear installation device. This is a method of laying the cable in the cable tray by carrying and moving the tip of the cable to the next laying device, so that the operator holds the tip of the cable and engages each laying device on the way. One tension only moving without damaging irrespective cable diameter and weight as well as the complicated shape of the cable tray of the cable can be smoothly laying the cable with light force pulling force. Therefore, it is possible to reduce labor and man-hours and achieve quick installation work at low cost.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a cable laying method according to the present invention.

FIG. 2 is also a diagram for explaining a method of laying a straight portion of the cable tray.

FIG. 3 is a plan view for explaining a laying apparatus suitable for carrying out the present invention.

FIG. 4 is also a diagram for explaining a pressing force adjusting means.

FIG. 5 is a view showing a modified example of the lid member.

[Explanation of symbols]

 1 Cable Tray 2 Straight Part 3 Curved Part 4 Side Wall 7 Cable 10 Main Body 11 Locking Part 12 Flat Part 13 Guide Part 15 Tightening Bolt 17 Stopper 20 Feeding Roller 25 Pressing Roller 26 Biasing Cylinder Device 26a Piston Rod 27 Pressurizing Cylinder Device 27L Operating lever 28 Slider 29 Guide rod 30 Drive means 31 Rotating shaft 33 Air motor 40 Tension detecting means 41 Detection arm 42A, 42B Spring 43, 44 Guide roller 48 Lid member 50 Control means 51 Drive shaft 52 Control valve 53 Piping 53a Non-return Valve 53b Open / close valve 53c Air source 100,100 'Laying apparatus

Claims (1)

[Claims] 1. A tension detecting means for detecting tension in a pull-out direction of a cable engaged with a guide roller of a detection arm, wherein the feed roller is rotated based on the detected tension value to be engaged with the feed roller. A plurality of laying devices, which are formed so as to reduce the tension on the cable pull-out side while sending out the cable, are attached at intervals in the longitudinal direction of the cable tray, and the tip side of the cable is attached to the feed roller in the laying device in front. After the engagement, the tip of the cable is pulled and moved while carrying the tip of the cable, and then the tip side of the cable is repeatedly engaged with the feed roller in the cable laying device, and the cable is moved to the next cable laying device. A cable laying method comprising carrying and moving a tip of a cable to lay the cable in a cable tray.