JPH0757056B2 - Cable laying equipment - Google Patents

Description

The present invention relates to a cable laying device used for laying a cable in a cable tray.

[Prior Art] Conventionally, when laying a cable in a tray at various construction and construction sites, the cable is pulled out manually from a cable drum and guided in a tray having a complicated route shape.

[Problems to be Solved by the Invention] However, in such a conventional method, since the cable drum around which the cable is wound has a high weight, its rotational frictional resistance is excessive, and the cable is pulled out unless a considerably large tensile force is applied. I can't.

Therefore, the labor of the worker is large, and in many cases, a plurality of workers (for example, 10 or more) are required only to obtain the tensile 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.

Especially when the cable tray is installed in a high place or underground, its shape is complicated with many curved parts. Therefore, simply increasing the number of workers will allow the cable to be pulled out smoothly along the cable tray. Not only can it not be guided, but the cable is damaged because it drags on the cable tray.

The present invention has been made in view of the above circumstances, and an object of the present invention is to automatically send out a cable so as to reduce the tension applied to the cable in the cable tray regardless of the curved portion and the straight portion, thereby increasing labor and man-hours. It is to provide a cable laying device that can reduce the work load and ensure work safety.

[Means for Solving the Problems] In the present invention, since the conventional problems described above are that the outer diameter and weight of the cable and the winding amount are different, the drag force based on an arbitrary rotational friction resistance force of the cable drum It was analyzed that it was caused by the fact that the cable tray was left unattended and the shape of the cable tray was approved, and that it was pulled out and guided by simply adding human power to overcome it, and was concerned about its outer diameter, weight, etc. and the shape of the cable tray. Instead, the cable is positively sent out at a proper position on the cable tray and further from the cable drum side to achieve the above object.

That is, a main body (10) detachably formed on a cable tray (1), a feed roller (20) rotatably mounted on the main body (10), and a feed roller (20) provided on the main body (10). ) For rotating the cable (7) in the feeding direction of the cable (7) and a feed roller (20) provided in the main body (10).
Cable (7) in cable tray (1) engaged with
Tension detecting means (40) for detecting the tension applied to the feed roller (20) so that the feed roller (20) rotates in a direction to reduce the tension of the cable (7) based on the tension value detected by the tension detecting means (40). A drive means (30) and a control means (50) for controlling rotation of the drive means (30). The tension detecting means (40) has a base end rotatably supported by the main body (10) and a pair of guide rollers (43) at the front end. ), (44) are provided on the detection arm (41),
This detection arm (41) is characterized in that it is formed to include biasing means (42A), (42B) for holding the detection arm (41) in a neutral position and permitting bidirectional tilt rotation.

[Operation] According to the present invention, when a tensile force is applied to the cable (7) manually, the tension detecting means (40) detects the magnitude of the tensile force applied to the cable (7). Then, the control means controls the rotation of the driving means (50) in the direction of decreasing the detected tension value, and the feeding roller (20) automatically feeds the cable (7).

Therefore, in consideration of the shape of the (50) cable tray (1), etc., the control means (50) is provided with an appropriate number so that one operator can easily pull out the cable (7).
If the cable is attached to the cable tray (1) at a proper position, the cable (7) can be installed in the cable tray (1) quickly and reasonably with a small force.

Further, the tension detecting means (40) can be tilted and rotated in both directions from the neutral position, so that the cable tray (1) can be applied in a linear shape even if it is bent in any direction.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the present cable laying apparatus 100 is roughly divided into a main body 10, a feed roller 20, a driving means 30, a tension detecting means 40, and a control means 50. The cable 7 is formed so as to be positively and automatically delivered in a direction in which the tension F applied to the cable 7 is reduced.

First, as shown in FIG. 1, the main body 10 includes a locking portion 11 and a flat surface portion 1.
2, the guide part 13 and the locking part 11 on the cable tray 1
The cable tray 1 can be attached to and detached from the cable tray 1 by being fitted into the side wall 4. A plurality of tightening bolts 15 are provided for secure 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 so as to be positioned in 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 to stabilize the posture. It is provided as a measure.

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 synchronously from jumping out. The pressing rollers 20 are arranged opposite to each other so that the feeding force is smoothly exerted. Like the feed roller 20, the pressing roller 25 is made of hard rubber that allows a certain elastic deformation, and is rotatably mounted on the slider 28. The pressing roller 25 (slider 28) is slidably mounted on a guide rod 29 supported by the main body 10 and can be moved vertically in FIG. 1 by pressing force adjusting means including a cylinder device 26 and the like. It is said that.

Here, the pressing force adjusting means may be constituted by a spring urging system or the like, but in this embodiment, a pressing force adjusting range in which a necessary and sufficient pressing force is applied and which is generated in the case of the spring urging system is used. The pneumatic system is used to prevent the pinching of the above.

That is, as shown in FIG. 2, 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 (operating lever for applying a desired air pressure to the cylinder device 26). 27L) and.

Incidentally, 53a is a check valve for keeping the pressing force constant, 53b is an opening / closing valve, and 53c is a compressed air source.

Therefore, if the operating lever 27L is operated, the slider 2
8 moves to apply a desired pressing force to the cable 7 interposed between the feed roller 20 and the pressure roller 25,
At 20, it is possible to set a necessary and sufficient frictional force for smoothly sending out the cable 7.

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, if air is sent to the cylinder chamber D through ports G and H,
Since the air in the cylinder chamber C escapes through the ports I and J, the rod 26a can be moved to the left.

Now, the feeding control of the cable 7 in the direction indicated by the arrow Y in FIG. 1 is performed by the cooperation of the feeding roller 20, the driving means 30, the tension detecting means 40 and the controlling means 50. In this embodiment, the driving means 30 includes an air motor 33 and a feed roller
It is composed of a rotary shaft 31 that connects 20 with the flat part 12 of the main body 10.
It is provided in. For this purpose, the control means 50 comprises a pipe 53 for supplying compressed air to the air motor 33, 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. , Body 10
It is provided on the flat portion 12. The purpose of using the air motor 33 is to withstand the lock on the load side and to use it as a signal to notify a work abnormality due to aerodynamic noise.

On the other hand, the tension detecting means 40 is provided in the main body 10. Specifically, the tension detecting means 40 includes a detecting arm 41 that is rotatably supported by the flat surface portion 12 of the main body 10 and a pair of springs 42A and 42 that are biasing means.
The tension F1 or F2 applied to the cable 7 depends on the bidirectional rotation angle of the detection arm 41 from the neutral position (the state shown by the solid line in FIG. 1) that is composed of B and is regulated by both springs 42A and 42B. Is configured to detect

That is, the detection arm 41 is connected to the drive shaft 51,
It is rotatably supported by the plane protrusion 12A of the main body 10. Also,
Both springs 4A and 42B are stretched over the lead-out portions 41A and 41B and the main body 10 (12) so as to be distributed. Therefore, the detection arm 41
Is in a neutral position by the uniform urging force of the springs 42A and 42B in the unloaded state, and when a tensile force (F1 or F2) in a predetermined direction is applied from the cable 7, a bidirectional tilted rotation indicated by a dotted line or a two-dot chain line is shown. Can move.

A pair of guide rollers 43 and 44 are provided at the tip of the detection arm 41 for the convenience of guiding the cable 7, and a lid member 48 is provided to prevent the cable 7 from departing.

In the present embodiment shown in FIG. 1, the lid member 48 is formed of a flange member having a larger diameter than that fixed to the one guide roller 44. However, for example, it may be an open / close door type shown in FIG. You can

Here, the coupling relationship between the respective means 30, 40, 50 is that the detection arm 41 rotates in the directions of arrows θ1, θ2 when the tension applied to the cable 7 (arrows F1, F2 shown in FIG. 1) increases. It is selected that the opening degree of the control valve 52 is adjusted in the direction to reduce the tension by rotating the drive shaft 51 by the rotation angle. Therefore, when the tension F1 is applied to the cable 7, the detection arm 41 resists the urging 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 is reduced, the rotation angle θ1 of the detection arm 41 is reduced, and the rotation speed of the feed roller 20 is reduced. The detection arm 41 is connected to the stopper 17
When the position is restricted to A or 17B, the control valve 52 is fully closed and the air motor 33 is stopped.

Next, the operation of this embodiment 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 main laying apparatus 100 is attached to each of the bending portions 3 (sections to sections). In addition, the device 10
Wear 0 '. 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. With each device 100, the operating lever 27L
Is operated to adjust the pressing force of the pressing roller 25.

Next, at the tip of the cable 7 wound around a cable drum (not shown) arranged on the side of FIG.
Tie a messenger wire 7'of smaller diameter than
The messenger wire 7'is pulled out to a portion along the cable tray 1 through the rollers 20 and 25 of each device 100. Small diameter, light weight and forceless messenger wire 7 '
The work is extremely easy because the work is pre-installed. However, the lightweight cable may be pulled directly.

Then, when the worker pulls the messenger wire 7'at the section, a constant tension is applied to the wire 7 '. Then, first, the tension detecting means 40 of the device 100 arranged in the portion is operated, and the feed roller 20 is rotated under the cooperation of the control means 50 and the driving means 30. Sequentially, -between,
The feed roller 20 of the unit also rotates. However, since the messenger wire 7'has a smaller diameter than the cable 7, the operation of these (each device 100 'disposed in and the device 100' between-) exerts a guiding function at this stage. The original function of sending out the cable 7 does not work.

When the tip of the cable 7 pulled out from the cable drum is inserted between the rollers 20 and 25 of the apparatus 100 mounted on the section, the tension detecting means 40, the control means 50, and the driving means.
The feed roller 20 is rotated by the cooperation of 30 to move the cable 7
Positively and automatically send out in the Y1 direction.

Therefore, the worker can pull the messenger wire 7'with a slight pulling force in the section. In this way, the cable 7 sent out is advanced in the X1 direction and then sent out in the Y2 direction by the device 100 mounted on the section. -Looseness etc. between is eliminated by the device 100 '. After that, it is similarly sent out in the X2 direction and the Y3 direction.

Therefore, by pulling the messenger wire 7 ′ or the cable 7 at the section, the worker can smoothly lay the large-diameter / high-weight cable 7 in the cable tray 1 having a complicated shape with a slight pulling force. After laying the cables, the slider 28 is slid to remove the cables 7 and the next cable laying is performed. After the laying of all cables is completed, the respective devices 100, 100 'are removed from the cable tray 11.

Further, without using the messenger wire 7 ', the operator can move the cable 7 by sliding the slider of the device 100 at the tip of the cable and passing it between the rollers 20 and 25 to lay the cable 7.

Therefore, according to the present embodiment, the device 100 is composed of the main body 10, the feed roller 20, the driving means 30, the tension detecting means 40, the control means 50, etc., and is attachable / detachable to / from the cable tray 1, and when the cable 7 is attached, Since the cable 7 engaged with the feed roller 20 is positively and automatically fed so as to reduce the tension F applied to the cable 7, the diameter and weight of the cable 7 and the complicated shape of the cable tray 11 can be changed. Regardless, the cable 7 can be smoothly laid with a slight 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 detecting means 40 includes a detecting arm 41 and a pair of springs 42.
In the unloaded state including A and 42B, the neutral position shown in FIG. 1 is obtained, and the tilted rotation is possible with respect to both pulling forces F1 and F2. Therefore, the state 100 'shown in FIG. It can also be used for straight sections.

Further, since the pair of guide rollers 43, 44 are provided at the tip end portion of the detection arm 41 forming the tension detecting means 40, the direction change in the curved portion 3 of the cable 7 and the delivery guide can be smoothly performed. The lid member 48 further promotes this effect.

Further, the pressing roller 25 is composed of pressing force adjusting means (26, 27, 28, 2
Since it is formed so that the relative position to the feed roller 20 can be made variable by 9) and the pressing force on the cable 7 can be adjusted, a reasonable feeding force can be generated even if the outer diameter of the cable 7 changes and the adaptability is improved. Is wide.

Further, since the locking portion 11 of the main body 10 has a shape convenient for fitting to the side wall 4 of the cable tray 1, quick work is assured from this point as well.

In the above embodiments, the driving 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, but these are not limited to the above range. For example, it can be implemented as a servo motor system.

Further, the tension detecting means 40 detecting arm 41 is arranged to be disposed substantially at the center of the main body 10 (flat surface portion 12) as shown in FIG. 1, but is arranged to be eccentric as shown in FIG. Good. In this way, the detection arm 41 is divided into two members 411, 412.
Since the bent portion 7a of the cable 7 itself can be used as a part of the detection arm 41 by forming the above, the cable 7 can be arranged also in the straight portion 2 of the cable tray 1 for smooth cable laying. It will be more convenient if the groove 41a is provided in the member 411 and the length of the member 411 with respect to the member 412 can be changed by the bolt 42b.

Note that FIG. 5 (A) shows before the feeding of the feed roller 25, and FIG. 5 (B) shows the case where the detection arm 41 tilts and rotates to reduce the tension. Further, 200 is a pulling means that includes a pulling roller 201 and is detachably attached to the cable tray 1, and is mainly an apparatus.
It is used together with 100 in laying on the straight portion 2 of the cable tray 1.

[Advantages of the Invention] The present invention comprises a main body that can be attached to and detached from a cable tray, a feed roller mounted on the main body, a driving means, a tension detecting means, and a controlling means, and the tension detecting means can be tilted in both directions. Since the cable is actively and automatically sent in the direction to reduce the pulling force applied to the cable in the cable tray, the work safety is guaranteed while the cable is not damaged, and the labor and man-hours are significantly reduced. It is possible to provide a cable laying device capable of doing the above. It also functions effectively in the straight part of the cable tray.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a view for explaining a pressing force adjusting means, FIG. 3 is a view showing a modified example of a lid member, and FIG. 4 is a laying work. FIG. 5 and FIG. 5 are diagrams for explaining a modified example of the present device. 1 ... Cable tray, 2 ... Straight part, 3 ... Curved part, 4 ... Side wall, 7 ... Cable, 7 '... Messenger 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 …… Pressing roller, 26 …… Biasing cylinder device, 26a… … Piston rod, 27 …… Pressurizing cylinder device, 27L …… Operating lever, 28 …… Slider, 29 …… Guide load, 30 …… Driving means, 31 …… Rotary 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 ... Laying device.

Claims (1)

[Claims] 1. A main body (10) detachably formed on a cable tray (1), a feed roller (20) rotatably mounted on the main body (10), and a feed provided on the main body (10). The drive means (30) for rotating the roller (20) in the feeding direction of the cable (7) and the feed roller (2) provided in the main body (10).
Tension detecting means (40) for detecting a tension applied to the cable (7) in the cable tray (1) engaged with the cable tray (0),
A control means (50) for controlling rotation of the drive means (30) so that the feed roller (20) rotates in a direction to reduce the tension of the cable (7) based on the tension value detected by the tension detection means (40). ) And a pair of guide rollers (43), (4) at the tip end of the tension detecting means (40) whose base end is rotatably supported by the main body (10).
4) is provided with a detection arm (41) and biasing means (42A), (42B) for holding the detection arm (41) in a neutral position and permitting bidirectional tilt rotation. A cable laying device characterized by the above.