JP2828392B2 - Cable laying method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of feeding a cable from a cable drum to a power plant and other applications mainly for large-scale plants such as control, measurement, communication, and power. The present invention relates to a method for laying cables.

[0002]

2. Description of the Related Art Conventionally, cable laying has relied on manual methods since cables are relatively thin and lightweight, but recently, with the advancement of plant control,
While the laying amount has increased remarkably, the arrangement density of various devices and instruments that require connection has increased, and the number of routes for laying cables has increased. For this reason, recently, a mechanized construction method for laying cables has been proposed, and research and development thereof are being carried out.

[0003] The simplest mechanization method for laying cables is to bring a winch to the end of laying and tow the end of the cable fed from a cable drum placed at the starting point of laying. A wire is connected, and the wire is wound around a winch drum to extend the cable to the end point.However, in order to process a large amount of cable, the wire is wound and unwound. Must be repeated, resulting in poor construction efficiency.

[0004] Therefore, a construction method using a loop pulling type wire drawing apparatus as disclosed in Japanese Patent Application Laid-Open No. 04-295216 has been proposed. This will be described with reference to FIG. FIG. 14 is a conceptual side view of a main portion of a towed wire and a cable for laying of the loop towed type wire drawing device of the above technique.

[0005] A rope 1 mainly composed of organic fibers such as natural fibers and synthetic fibers is used as a tow wire. Terminal of the rope 1 is mutually rotatably shaft connected by a cylindrical movable catch 2, for example, an elongated loop is formed on the steel tray 3, of the loop key <br/> catcher data pin la formula It is driven by a feeding device.

The universal joint 2 has a diameter substantially equal to the diameter of the rope 1, and has a guide tongue 2a extending radially in a plane including the cylindrical shaft. A free hook 6 capable of hanging a cable grip 5 fixed to the end of the cable 4 is loosely fitted. If the cable 4 is to be extended, the looped rope 1 must be
It is driven by a pin la type feeder, laying extending line towing cable 4.

On the other hand, a construction method using a wire drawing machine that does not use a rope for towing is described in Japanese Utility Model Laid-Open No. 63-127217.

FIG. 15 is a plan view of a traveling rail of the wire drawing machine, and FIG. 16 is a sectional view taken along the line II. The running rail 7 is composed of a base plate 8,
On one surface (here, the right surface), there is provided a groove member 10 in which the deformed portion 9a formed at the end of the traveling rail support member 9 is fitted and fixed, and the other surface (the left surface) of the base plate is provided. The fixed side winding 11 of the linear motor is attached to.

FIG. 17 is a view showing a state where the above wire drawing machine is mounted on a traveling rail. FIG. 18 is a detailed explanatory view of the wire drawing machine of FIG. 17, and FIG. 19 is a sectional view taken along line II-II of FIG.

In FIG. 17, the wire drawing machine 12 runs on the running rail 7 in the direction of the arrow. Here, the cable 4 is fixed by the wire drawing machine 12 and the accompanying vehicle 13 by the holding device 14 provided on the wire drawing machine 12 and the accompanying vehicle 13.
Laying wire.

In FIGS. 18 and 19, the wire drawing machine 12 is provided with rollers 15 and 16 for sandwiching both side surfaces and both side surfaces of the base plate 8 of the traveling rail 7, respectively. The cable is drivable by providing a wire, and has a cable holding device 14 for holding and pulling the cable 4 to be laid. The wire drawing machine 12 is driven by power supply itself.

In FIG. 20, a connector for enabling an electrical connection with an adjacent traveling rail 7 and a mechanical connecting device are provided at the connecting portion of the traveling rail 7. When the path of the traveling rail 7 is bent, the traveling rail 7 is almost at the center 17.
Therefore, it is notched obliquely in accordance with the bending angle, is connected via a pin at the tip, and is provided with a contact plate 18 so as not to hinder the running of the wire drawing machine 12 by the opening.

[0013]

SUMMARY OF THE INVENTION The above-mentioned JP-A-4-24-2
A method using a loop pulling type wire drawing device as disclosed in Japanese Patent Application Laid-Open No. 95216 and a method using a wire drawing machine as disclosed in Japanese Utility Model Application Laid-Open No. 63-127217 are effective when the cable laid wire is short. There is expected. However, the number of paths for cable installation is increasing, and the paths are not only bent, but also move up and down, and may even be vertical. In addition, when the cable installation extension is extended, the following problems occur. is there.

In the construction method using the loop pulling type wire drawing device,
That is, with the longer distance shall establish a number of feeder Cat pin la expression. When there is a vertical portion in the cable laying path, a free joint 2 is provided on the rope 1, and a cable for laying is provided via a free hook 6 and a cable grip 5 at the end of the guide tongue 2 a. fixing the terminal b le 4, even if traction cable blanking <br/> g 4 can not smoothly rolled wire twisted. The cable has an allowable tensile strength that is determined by its type and size, and the tension must not be exceeded. In the loop pulling type, a hook is attached to the end of the cable to pull one point, so due to the limitation of the allowable tensile force,
Determines the maximum cable length that can extend lines laying in 1 loop,
This makes it impossible to lay a long wire.

In the method of laying a cable using a wire drawing machine that does not use a rope for towing, that is, when the path is not only bent but also moved up and down and further vertically as the distance becomes longer. Therefore, providing the connecting means for the traveling rail as shown in FIG. As shown in FIG. 15, a plurality of wire drawing machines are arranged on the traveling rail 7 with the longer distance, the cable is fixed by the holding device, and the wire drawing machine is driven by the linear motor to travel. It is necessary to arrange a number of wire drawing machines.
Even when the accompanying vehicle as shown in FIG. 7 is provided, it is difficult to adapt to the increase in the number of routes. In addition, when a large number of wire drawing machines are used, it is necessary to intermittently return the wire drawing machine and the like to the initial state after the cable laying is completed once. Therefore, continuous wire drawing cannot be performed.

The present invention is based on the premise of a method of laying cables without using a wire rope, and makes various studies.
An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a method of laying a cable which can lay a long distance and a vertical line.

[0017]

In order to achieve the above object, in a construction method of extending a cable from a starting point to an end point of cable laying, a detaching stopper having a spring mechanism is provided on the cable laying path. A chain conveyor having a plurality of hooks each having a freely attached angle adjuster is installed, and the cable end is engaged with a flexible pipe, a telescopic and flexible support of a spring-loaded cable grip, and At the beginning of the laying, the support is engaged with one hook of the chain conveyor, and then the chain conveyor is driven to move the chain conveyor.
The cable is fed out of the cable drum in synchronization with the line speed, and the cable is freely supported on other hooks of the chain conveyor, and each hook is freely movable with respect to the axis of the cable according to each location of the installation path. The cable is continuously transported at an angle adjusted to
And extending the cable from the starting point to the end point of the cable laying so as not to be applied .

According to the present invention, a plurality of hooks having a stopper provided with a spring mechanism are freely attached to a chain conveyor using an angle adjuster, and the end of the cable can be extended and contracted by a flexible pipe and a spring-loaded cable grip. Engage the flexible support and start the cable
Engaging the end via a support with one hook of the chain conveyor, and then driving the chain conveyor;
The cable is fed out of the cable drum in synchronism with the speed, and the cable is freely supported on other hooks of the chain conveyor, and each hook is freely movable with respect to the axis of the cable according to each location of the laying path. With the angle adjusted, the conveyor is continuously driven by the drive of the chain conveyor to prevent tension on the cable.
And extend the cable from the starting point to the end point of the cable installation.
Even if there is a rising part, a falling part, or even a vertical part, the cable does not come off the hook by the stopper and the tip of the cable is a flexible pipe,
It is free in the elastic and flexible support of the cable grip with spring, and the cable itself is also
Since the cable is supported without being fixed in the traveling direction, the force acting before and after the cable is reduced, and the wire can be laid smoothly.

Furthermore, the traction force does not concentrate on the tip of the cable,
Since the hooks are distributed to the hooks, it is possible to lay a long wire.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing one embodiment of the method of the present invention. In the method of extending and laying the cable 4 from the starting point P to the end point Q of the cable laying, a detaching stopper having a spring mechanism described later is provided between the laying of the cable from the starting point P to the end point Q.
A chain conveyor 21 to which a plurality of hooks 23 are attached is temporarily provided, and the end of the cable 4 is fitted to and engaged with the flexible pipe 22, and at the starting point P of the cable installation, the chain conveyor 21 is flexibly attached to one hook 23 of the chain conveyor 21. The tip of the pipe 22 is engaged, and then the chain conveyor 2
1 is driven to synchronize with the traveling speed of the chain conveyor 21 and the cable 4 is paid out from the cable drum 24, and the cable 4 is connected to another hook 2 of the chain conveyor 21.
The cable 4 is extended from the starting point P to the end point Q of the cable laying while freely supporting the cable 4 . Reference numeral 25 denotes a rail of the chain conveyor 21, reference numeral 26 denotes a take-up device, and reference numeral 37 denotes a driving unit.

FIG. 2 is a side view showing an embodiment of a hook used in the apparatus of the present invention, and FIG. 3 is a front view thereof. The hook 23 has a U-shape, and the upper portion of the hook 23b is bent to form a cable insertion guide 23c, thereby facilitating the insertion of the cable.

Further, the hook 23 covers the contact portion with the cable with the heat-shrinkable rubber 31 so as not to damage the cable surface. The hook 23 has R20 ° to stabilize the placement of the cable. For the hook 23, the size of the opening degree of the insertion guide portion 23c, the type of the covering material in contact with the cable, and the size of R can be appropriately adopted depending on the size of the diameter of the cable.

The stopper 25 is used to close the entry side of the hook 23.
The shaft is supported so that it can be closed. The stopper 25 is bent in the direction of the arrow of the hook 23 so that the entrance side of the hook 23 can be closed, and the closed state can be held by using a spring with a pivot.

Thus, the cable can be easily inserted into and supported by the hook 23 by its own weight only by placing the cable on the insertion guide portion 23c manually or the like.

The hook 23 is attached to the joint 34a of the chain 34 of the chain conveyor 21 by a bolt or the like through a small hole 23d provided above the hanging portion 23a.
Here, the hook 23 with the angle adjusting member 23e, since the switch <br/> En 34 are mounted for at an angle, Ke
At the rising, falling, and vertical portions of the chain conveyor 21 between the cable
Since the cable is engaged with the cable at an appropriate angle with respect to the axis , the cable is supported by the hook 23 and can be extended.

FIG. 4 is a side view showing another embodiment of the hook used in the device of the present invention, and FIG. 5 is a front view thereof. On the upper part of the monopod 27a, the gate-type hook 27 is attached with a side stopper 29a which opens and closes on the outer side using a hinge 28 with a spring.
A bottom stopper 29b that opens and closes inward using a spring-loaded hinge 28 is attached to the end of the other leg 27b.

Here, since the bottom stopper 29b is opened and closed in the direction of the arrow by using a hinge 28 with a spring, the cable is manually lifted and brought into contact with the bottom stopper 29b, so that the bottom stopper 29b is contacted. Is opened, and the cable is inserted into the portal hook 27.

When the cable is inserted into the portal hook 27, the bottom stopper 29b returns to the closed state by the action of the spring of the spring-loaded hinge 28, and supports the cable. In this case, the safety is further enhanced by providing the stopper 30 at the tip of the side stopper 29a.

On the other hand, after the cable is extended from the starting point of the cable installation to the end point, the side stopper 29a is manually inserted.
The cable can be easily detached from the portal hook 27 by opening the cable outwardly from the side.

Most of the bottom stopper 29b and the side stopper 29a are covered with a heat-shrinkable rubber 31 so as not to damage the cable surface.

The side stopper 29a has a length slightly protruding from the position of the bottom stopper 29b, and its end is manually pushed outward to the side to facilitate opening. Also, a spring 32 is attached to the upper part of the side stopper 29a and the upper inside of the portal hook 27 so that the side stopper 29b is opened and the cable does not come off from the hook 27 during the extension of the cable. The arm 27 b is drawn inside the side surface of the portal hook 27.

A suspension arm 27c is attached to the outside of the upper center of the gate-shaped hook 27, and the suspension hook 27c is attached to the chain 21a of the chain conveyor 21 by bolts or the like through a small hole 27d provided in the upper part of the arm 27c.

Here, since the portal hook 27 is freely attached to the joint 34a of the chain 34 at a fixed angle by using the angle adjuster 27e, the rise and fall of the chain conveyor 21 between the cable installations. Further, since the portal hook 27 engages with the cable at an appropriate angle to the axis of the cable at a vertical position, the cable is supported by the portal hook 27 and extended. in There
I can .

FIG. 6 is a view showing a state of a cable end portion of an embodiment in which a cable is supported by a hook of a chain conveyor type cable drawing machine of the present invention. In FIG. 6, a groove 34 provided on a lower portion of the rail 33 is provided on a chain 34 running on a rail 33 of the chain conveyor 21 in a direction indicated by a thick arrow.
5 attach the hook 23 to the flexible pipe 2
2 is engaged with the hook 23. The cable 4 is engaged with the other end of the flexible pipe 22 by fitting the cable tip. The cable 4 is supported by the hook 23, and is supported in a state where the stopper 25 is prevented from coming off the hook 23.

FIG. 7 is a view showing a state of a cable end portion of another embodiment in which a cable is supported by a hook of a chain conveyor type cable drawing machine of the present invention. In FIG.
The hook 23 is attached to a chain 34 running on the rail 33 of the chain conveyor 21 in the direction of the thick arrow through a groove 35 provided at the lower portion of the rail 33, and the end of the spring-attached cable grip 36 is engaged with the hook 23. I have. The cable 4 is engaged with the other end of the spring-attached cable grip 36 by fitting the cable tip. Cable 4 is hook 2
3 and is supported in a state where the hook 23 prevents the hook 23 from coming off the hook 23.

FIG. 8 is an explanatory view of another embodiment according to the method of the present invention. Here, a cable laying distance of 74 m, a chain laying distance of 150 m, and a cable were vinyl insulated wires for control (CVV2sq-30 °).

In FIG. 8, a chain conveyor 21 having a plurality of hooks 23 is temporarily provided between the cable laying at the starting point P and the ending Q. Here, a horizontal portion A, a 90 ° elevator portion B, a 66 ° rising portion C, a 59 ° falling portion D, and a 45 ° portion of the chain conveyor 21 temporarily installed between the cable laying.
The positions of the elevator section E, the vertical section F, and the end section G are shown. The elongation of the chain is absorbed by a take-up device 26. Reference numeral 37 denotes a drive unit of the chain conveyor 21. Here, the chain runs in the direction of the arrow.

FIG. 9 is a view showing the state of the cable extension of FIG. 8 at the horizontal part, FIG. 10 is a view showing the state of the 90 ° elevator part, and FIG. 11 is a state of the 66 ° rising part. FIG. 12 is a diagram showing a state at the 59 ° falling portion, and FIG. 13 is a diagram showing a state at the vertical portion. Here, the chain runs in the direction of the arrow.

At the starting point P of the cable laying provided on the horizontal portion A of the chain conveyor 21, the flexible pipe 22 fitted with the tip of the cable 4 is engaged with the hook 23 of the chain conveyor 21 as shown in FIG. The horizontal portion A is extended by driving the chain conveyor 21 so that the cable 4 connected to the flexible pipe 22 is freely supported by the hook 23 having the stopper 25 at the corresponding position. I have. 38 is a support for the chain conveyor 21.

In the 90 ° elevator section B of the chain conveyor 21, as shown in FIG. 10, the cable 4 has its free end fitted to the flexible pipe 22, so that the tension in the front and rear of the cable 4 is reduced. And extend smoothly.

At the 66 ° rising portion C of the chain conveyor 21, as shown in FIG. 11, the stopper 25 of the hook 23 prevents the cable 4 from coming off.
Is supported by a hook 23 having a predetermined angle that is freely adjusted with respect to the axis of the cable 4 by an angle adjuster 23e.
Is done . Therefore, the cable 4 can be extended smoothly without coming off the hook 23 .

Following the 66 ° rising section C, the driving section 37
Is installed, and drives the chain conveyor 21 there. The cable 4 extending the 66 ° rising section C and the driving section 37 extends the 59 ° falling section D. In this case, as shown in FIG.
The hook 3 is supported by a hook 23 having a predetermined angle freely adjusted with respect to the axis of the cable 4 by 3e, and extends smoothly.

The cable 4 extending the falling portion D of the chain conveyor 21 extends the 45 ° elevator E in the same manner. Further, the extension of the cable 4 is progressed, and in the vertical portion F, as shown in FIG.
The wire is supported by the hook 23 having a predetermined angle freely adjusted with respect to the axis of the cable 4 and smoothly extends.

At the end G of the chain conveyor 21, the cable 4 is further towed by an extra length at the end point of the cable installation, and then the drive of the chain conveyor 21 is stopped, and the cable 4 is manually moved. 4 is detached from the hook 23. Normally, one operator removes the cables 4 from the hooks 23 while checking.

As is apparent from the above embodiment, according to the method of the present invention , no tension is applied to the cable during transportation.
Because you so, are smoothly carry the cable
Came . When using the hook according to the invention, there was no shedding. In the case of the L-shaped hook used for comparison, the cable dropped off at the rising portion.

Since the hook used in the present invention has the shape shown in FIGS. 2 to 5 and is covered with the heat-shrinkable rubber 31, it does not cause a flaw or the like on the cable 4 and has an effect of preventing slipping. In addition, hooks 23 to the chain conveyor 21
Of the cable 4 using the angle adjuster 23e.
Since the manner angled freely with respect to the horizontal section A, the corner portion in the path of the cable installation, the rising station C, a falling edge D, even more if there is point of the vertical portion F, fall off There is no.

According to the present invention, there is no problem in carrying a thick cable or a plurality of cables. In the present invention, since the chain conveyor 21 is used, the cable can be continuously extended between the same installations.

In the above embodiment, the case where the chain conveyor 21 is temporarily installed has been described. However, it goes without saying that the same effect can be obtained when the chain conveyor 21 is permanently installed.

[0049]

As described above, according to the present invention, as a method of laying a cable without using a wire rope, even if there is a portion such as a vertical portion in a cable extending route, a hook is used in accordance with each portion. Cables are laid at an angle that can be freely adjusted with respect to the axis of the cable, and are continuously transported by the drive of the chain conveyor without dropping the cable so that tension is not applied to the cable. Since the cable is extended from the starting point to the end point, it is possible to continuously extend the cable over a long distance.

[Brief description of the drawings]

FIG. 1 is an explanatory view of one embodiment of the method of the present invention.

FIG. 2 is a side view showing an embodiment of a hook used in the method of the present invention.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a side view showing another embodiment of a hook used in the method of the present invention.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a side view of an essential part showing a state of an embodiment in which a cable tip of the present invention is supported on a hook of a chain conveyor.

FIG. 7 is a side view of a main part showing a state of another embodiment in which a cable tip of the present invention is supported by a hook of a chain conveyor.

FIG. 8 is an explanatory view of another embodiment of the method according to the present invention.

9 is a diagram showing a state of a horizontal portion of the cable extension of FIG. 8;

FIG. 10 is a diagram showing a state of the cable extension of FIG.

11 is a view showing a state at a 66 ° rising portion of the cable extension of FIG. 8;

12 is a diagram showing a state at a 59 ° falling portion of the cable extension of FIG. 8;

FIG. 13 is a view showing a state of a vertical portion of the cable extension of FIG. 8;

FIG. 14 is a conceptual side view of a main part of a towed wire and a cable for laying of a conventional loop towed wire drawing device.

FIG. 15 is a plan view of a traveling rail of a conventional wire drawing machine that does not use a wire rope.

FIG. 16 is a sectional view taken along the line II of FIG. 15;

17 is a view showing a state where a wire drawing machine is attached to the traveling rail of FIG.

FIG. 18 is a detailed explanatory view of the wire drawing machine in FIG. 17;

19 is a sectional view taken along the line II-II in FIG.

20 is a diagram showing a connection state of traveling rails of the wire drawing machine of FIG.

[Explanation of symbols]

 Reference Signs List 21 chain conveyor, 22 flexible pipe, 23 hook, 23a hanging portion, 23b hook portion, 23c cable insertion guide portion, 23d pore, 23e angle adjuster, 24 cable drum, 25 detaching stopper, 25a shaft, 26 Tick-up device, 27-gate hook, 28 Spring hinge, 29a Side stop, 29b Bottom stop, 30 Stopper, 31 Heat-shrink rubber, 32 Spring, 33 Rail, 34 Chain, 34a Splice, 35 Groove, 36 Spring-loaded cable grips, 37 drives, 38 supports.

Claims (1)

(57) [Claims] In a construction method of extending a cable from a starting point to an end point of cable laying, a plurality of hooks having a stopper provided with a spring mechanism are freely provided on the cable laying path by using respective angle adjusters. A chain conveyor attached to the chain conveyor is installed, and the end of the cable is engaged with a flexible pipe, a telescopic and flexible support of a spring-loaded cable grip. Engaging the support, then driving the chain conveyor, and running the chain conveyor.
The cable is fed out of the cable drum in synchronization with the line speed, and the cable is freely supported on other hooks of the chain conveyor, and each hook is freely movable with respect to the axis of the cable according to each location of the installation path. The cable is continuously transported at an angle adjusted to
The cable is laid from the starting point to the ending point of the cable laying so that the cable is not hung.