JP2000197225A - Protective pipe inserting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective pipe inserting machine, with which the protective pipe connecting work which is traditionally carried out by man power can be mechanized and protective ducts can be connected surely to each other, while the ducts are attached smoothly to the peripheries of electric wires in such a way that the workability is improved, the required man-hours are reduced, and then the occurrence of misoperations is prevented. SOLUTION: Since a protective pipe inserting machine transfers a protective pipe along its transfer path by means of a feed crawler 302 put around pulleys 300 and 301, the contacting area between the crawler 302 and duct can be increased, and accordingly, the feeding power of the machine can be increased and the stability of the machine when the machine feeds the duct can be improved. In addition, since a protective pipe connecting tool 40 is engaged with the locking projection of the preceding duct, the succeeding pipe can be connected smoothly to the preceding pipe, by surely fixing the preceding duct at connecting of the succeeding pipe to the preceding pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective tube for building obstruction and a protective tube for electric wires (for electric wires, a tube for protecting electric wires from trees, both of which are hereinafter referred to as protective tubes). , Called electric wires) by means of the indirect live-line method, or a protective tube insertion machine capable of removing the protective tube from the electric wires, and which achieves a reduction in workability and labor.

[0002]

2. Description of the Related Art Conventionally, this kind of protective tube insertion machine is shown in FIG.
As shown in the figure, the hydraulic hoses 2 and
3. The feeder 6 is rotated by the hydraulic motor 5 via the switching valve 4, and the protective tube 7 is sent out by the frictional force between the protective tube 7 and the feeder tire 6 and the rotational force of the feeder tire 6, so that the insertion machine body This device performs an operation of attaching around the electric wire 9 and a work of collecting and removing the electric wire 9 from the electric wire 9 using the guide 8 as a guide. The driving of the feed tire 6 is performed by a valve opening / closing operation of the switching valve 4 attached to the bucket 1a of the aerial work vehicle 1.

[0003] In the above-mentioned conventional protective tube insertion machine, the procedure of the protective tube mounting operation is as follows. (A) As shown in FIG. 17, as shown in FIG. 17, an insulating operation rod 10 used as a substitute for an operator's hand for the electric wire 9 (there are various types of insulating operation rods depending on the application of work, but here, Collectively
The insertion machine body 8 is attached to the electric wire 9 and fixed by using an operation rod. In addition, a tube support roller 11 serving as a support and guide for the protection tube 7 at the time of attachment / detachment is attached to the operation rod 12, and the operation rod 12 is attached to the electric wire 9 and fixed. (B) The protection pipe 7 attached to the electric wire 9 is gripped by another operation rod, and guided along the protection pipe guide 13 connected to the insertion machine main body 8 to the feed tire 6. (C) By operating the switching valve 4 previously installed in the bucket 1a of the aerial work vehicle 1 and rotating the feed tire 6, the protection pipe 7 is attached around the electric wire 9, and the end of the protection pipe 7 The temporary feeding is stopped at a position where the connecting portion in the section does not get over the feed tire 6. (D) Hold the protection tube 7 to be attached next with the operating rod, and
The protection pipe 7 is guided to the connection part of the protection pipe 7 along the protection pipe guide 13 and is pushed in to connect the two protection pipes 7 to each other. (E) The second protection pipe 7 connected to the first protection pipe 7 is attached around the electric wire 9 by operating the switching valve 4 again.
Further, by repeating the same procedure, the necessary number of protective tubes 7 are attached around the electric wire 9 while being connected to each other. (F) The work of removing the protective tube 7 from the electric wire 9 is performed in the reverse order of the above-described mounting work.

[0004]

However, there are the following problems in the above-mentioned conventional work of attaching a protective tube to an electric wire or removing it from the electric wire.
That is, (a) Skill of operation Since the connection of the protection pipe is an indirect operation performed by the operator using the operation rod, a problem is required in handling the operation rod and connecting the protection pipe. There is. (B) Incomplete connection of the protection tube The connection of the protection tube is determined by the touch of the hand through the operating rod and the visual judgment. If you get over it, there is a problem that the connection will be disconnected. (C) Incorrect operation of the switching valve The connection of the protection pipe must be performed by temporarily stopping the feed at a position where the connection of the protection pipe does not pass over the feed tire. However, there is a problem that a countermeasure due to an operation error has not been taken since the vehicle has completely passed over the feed tire and cannot be returned in the operation of the switching valve. As mentioned above, the worker
It is necessary to determine the feed speed of the protection pipe by operating the switching valve in advance, and to perform visual judgment and calculation based on operation experience to stop the connection part of the protection pipe at an appropriate position. Has the problem of making the mistake of getting over the feed tire. Also,
In order to restore the original condition by making an operation mistake,
Since the operation of holding the protective tube with the operating rod and returning it to the feed tire and returning it to a connectable position by operating the switching valve is required again, there is a problem that the operation is troublesome and the operation time increases. . (D) Feeding tire of the insertion machine body The feeding tire uses a rubber tube tire, and is pressed in advance to the insertion machine body to increase the feeding force of the protective tube, and fixed in a state where the preload is applied. Have been. This causes the following problem. When passing the feed tire, a large stress is applied to the protective tube (especially the female side), which may cause breakage. Since the tube tire is always pressed and fixed, stress is applied to the tire itself, and there is a high need for maintenance such as air leakage and air pressure management.

The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to mechanize a protective pipe connecting operation which has conventionally been performed manually and to improve workability and work efficiency. Provided is a protective tube insertion machine capable of shortening time, reducing labor, preventing work errors, and securely connecting protective tubes while securely installing protective tubes around electric wires. It is in.

[0006]

According to a first aspect of the present invention, there is provided a protective tube inserting machine for attaching a plurality of protective tubes having slits formed in a longitudinal direction around an electric wire and connecting the protective tubes to each other. An endless feed crawler that approaches and separates the protective tube from the electric wire is provided along the transport path of the protective tube in a state of being wound around a pair of pulleys, and is adjacent to the feed crawler. And a protection tube connecting device which engages with a locking portion formed at the rear end of the protection tube. According to the first aspect of the present invention, the protection tube is transported along the transport path by the feed crawler wound around the pair of pulleys, so that the contact area with the protection tube is increased and the feeding force is increased. By increasing the protection pipe and improving the stability of feeding the protection pipe, the protection pipe connecting device is engaged with the locking part of the protection pipe, so that the protection pipe preceding the protection pipe at the time of connection between the protection pipes is securely fixed. The connection work with the following protection pipe is performed smoothly.

According to a second aspect of the present invention, the feed crawler is provided with crawler pressing means for pressing the feed crawler against the protective tube. According to the second aspect, the crawler pressing means presses the feed crawler against the protective tube being transported along the transport path, so that the force from the feed crawler is smoothly transmitted to the protective tube and the protective crawler is protected. The tube is transported reliably.

According to a third aspect of the present invention, the feed crawler is made of an elastically deformable material. According to the third aspect, even when the outer surface of the protective tube has irregularities,
The feed crawler is elastically deformed and flexibly corresponds to the irregular shape, so that the protective tube is reliably transferred.

According to a fourth aspect of the present invention, a protective tube connecting device is provided so as to be able to approach and separate from a conveying path of the protective tube and engages with a locking portion of the protective tube. Stopper urging means for urging toward the transport path of the protection tube. According to the fourth aspect, the stopper of the protection pipe connecting portion is urged toward the transport path of the protection pipe by the stopper urging means, thereby stably supporting and guiding the protection pipe during transfer. When the protection pipes are connected to each other, the protection pipes are firmly engaged with the locking portions of the preceding protection pipe, so that the connection work with the subsequent protection pipe can be smoothly performed.

According to a fifth aspect of the present invention, the stopper has a U-shaped protection tube support, and the protection tube support is made of an elastically deformable material. In this claim 5,
Since the protection tube support portion of the stopper that supports and guides the protection tube is elastically deformed, the engagement between the protection tube and the locking portion of the protection tube after the connection of the protection tubes is smoothly performed.

According to a sixth aspect of the present invention, when the protective tube is detached from the electric wire, the stopper is configured to rotate in the transfer direction of the protective tube and to retract from the transport path of the protective tube. According to the sixth aspect, when the protective tube is detached from the electric wire, the stopper is rotated by the transported protective tube in the transfer direction of the protective tube and retracted from the transport path of the protective tube, thereby providing protection. The protection tube is smoothly transferred and removed from the electric wire without the stopper engaging with the locking portion of the tube.

According to a seventh aspect of the present invention, a straightening guide which is inserted into the inside of the protective tube and supports and guides the protective tube is disposed on the opposite side of the transport path of the protective tube from the feed crawler. . According to this aspect, the inner surface side of the protective tube is supported and guided by the straightening guide inserted into the protective tube being transported by the feed crawler, so that the protective tube is smoothly transported, When connecting the protection pipes, the protection pipes can be connected in a stable and stable posture.

[0013] The straightening guide according to claim 8 of the present invention,
An intermediate portion of the guide body is swingably supported along the transport path of the protection tube, and projections protruding into the transport path of the protection tube are provided at both ends of the guide body. According to the eighth aspect, the guide body of the straightening guide swings around the intermediate portion thereof as the protection tube passes, so that the projections at both ends of the guide body are alternately transported by the protection tube. , The transfer direction of the protective tube is corrected, and the female end of the protective tube is widened to smoothly connect the protective tubes.

According to a ninth aspect of the present invention, when the protective tube is fed toward the electric wire, the projecting portion urging means for urging the projecting portion on the front side of the guide body against the conveyance path of the protective tube is provided with the guide member. It is provided on the main body. According to the ninth aspect,
By the protrusion urging means, the front protrusion of the guide main body protrudes into the transport path of the protective tube, while the rear protrusion protrudes from the transport path of the protective tube, and this rearward protrusion and A sufficient gap is secured between the feed crawler and
The protective tube is smoothly fed into this gap. Also, when the first (preceding) protection tube is stopped in front of the feed crawler and the second (succeeding) protection tube is fed in, the tip of the subsequent protection tube is moved to the rear projection. By swinging the guide body in the direction of withdrawing from the transport path of the protective tube, the protrusion on the front side of the guide body protrudes toward the transport path side of the protective tube, pushing the rear end of the preceding protective tube open, and To make it easier to insert the tip of the following protection tube into the rear end of the protection tube.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a front view of a protective tube connector, and FIG.
FIG. 4 is a front view of the feed crawler system, and FIG.
FIG. 6 is a plan view of FIG. 4, FIG. 6 is a front view of a straightening guide, FIG. 7 is a front view of a protection pipe for building obstruction, FIG. 8 is a right side view of FIG.
7 is a left side view of FIG. 7, FIG. 10 is a front view of an electric wire protection tube (tree protection tube), FIG. 11 is a right side view of FIG. 10, FIG. 12 is a left side view of FIG. 10, and FIG. FIG. 14 is a front view of a state in which the tip of the protective tube of FIG.
FIG. 15 is a front view of a state in which the rear end of the second protective tube has passed the feed crawler, FIG. 15 is a front view of a state in which the tip of the second protective tube has been set at the position of the feed crawler, and FIG. It is a front view showing the state at the time.

In FIG. 1, reference numeral 20 denotes a guide portion of the protective tube insertion machine according to the present embodiment, and three receiving rollers 21 are rotatable below the guide portion 20 along the slant. It is provided in. And guide part 2
A protection pipe guide 22 is provided at the base end of the protection pipe 0 (the right end in FIG. 1).

A feed crawler mechanism 30 is provided so as to face the receiving roller 21 attached to the guide section 20. The feed crawler mechanism 30 includes a pair of a driving pulley 300 and an auxiliary pulley 3 as shown in FIGS.
01, an endless feed crawler 302 is wound around, the drive pulley 300 is mounted on a drive shaft 303a of a hydraulic motor 303, and a fixed shaft 305 is mounted on the hydraulic motor 303 via a mounting base 304. A swing arm 306 is provided on the fixed shaft 305 so as to be swingable, and a slave shaft 307 rotatably supporting the auxiliary pulley 301 is provided in a long hole 306 a formed in the swing arm 306. The hexagon nut 308 is fitted in a state where the movement along the hole 306a is permitted.
Further, a tension adjusting bolt 309 having the swing arm 306 inserted therethrough is fixed to the slave shaft 307.
Is screwed in, and the swing arm 306 is mounted between the swing arm 306 and the mounting base 304.
A coil spring (crawler pressing means) 310 is provided which urges in a direction away from the cylinder 04 (in FIG. 1, on the side of the receiving roller 21).

The feed crawler 302 is made of an elastically deformable synthetic rubber. Further, by rotating the bolt 309, the slave shaft 307 into which the bolt 309 is screwed makes the elongated hole 3
06, the driving pulley 300 and the auxiliary pulley 3
It is configured such that the tension of the feed crawler 302 wound between the feed crawlers 01 and 01 is adjusted.

An example of a protective tube which is supported and guided on the inner surface by the protective tube guide 22 and is sent between the receiving roller 21 and the feed crawler 302 is a general building as shown in FIGS. Obstruction protection tube 15 and FIGS. 10 to 12
An electric wire protection tube (tree protection tube) 16 shown in FIG.

Among them, the protective tube 15 for building obstruction is shown in FIG.
As shown in FIG. 9 to FIG. 9, a round tube shape is provided with a slit in the lower part thereof in the longitudinal direction, the cross section is C-shaped, and one of the tubes is 2-3 m long and is commercially available. In addition, an arc-shaped ridge 15a is formed on the outer periphery of one end (hereinafter, referred to as a male end 15d) of the protection tube 15 for building obstruction, while the other end (hereinafter, referred to as a female end 15e). An arc-shaped concave portion 15b is formed on the inner surface of ()), and the male side end 15d is fitted into the female side end 15e so as to be connected to each other. Further, a locking projection (locking portion) 15c is formed on the outer periphery of the female end 15e of the protection tube 15 for building trouble.

As shown in FIGS. 10 to 12, the electric wire protection tube 16 has a round tube shape and has a slit in the lower part in the longitudinal direction. And ribs are provided in the longitudinal direction. Then, when viewed in cross section, the ribs have a structure in which the right and left ribs alternately overlap with each other, and one rib is commercially available with a length of 2 to 3 m.

The outer periphery of one end (hereinafter referred to as a male end 16d) of the electric wire protection tube 16 is provided with an arc-shaped ridge 16
On the other hand, an arc-shaped concave portion 16b is formed on the inner surface of the other end (hereinafter referred to as the female end 16e), and the male end 16d is fitted into the female end 16e. Connected to each other. Further, a locking protrusion (locking portion) 16c is formed on the outer periphery of the female end 16e of the electric wire protection tube 16.

The mounting base 3 of the feed crawler mechanism 30
As shown in FIG. 1, a protective tube connecting device 4
0 is attached. As shown in FIGS. 2 and 3, the protective pipe connecting device 40 includes a spring post 400 attached to the mounting base 304, and a rotating bracket 402 rotatably provided on the spring post 400 via a fixed shaft 401. An adjusting bolt 403 screwed into the spring post 400;
3 and a spring seat 405 connected via a set screw 404
And a direction in which the rotating bracket 402 is provided between the spring seat 405 and the rotating bracket 402 and separates the rotating bracket 402 from the spring post 400 (the protective tube 1 in FIG. 1).
Coil spring (stopper urging means) 406 for urging the transfer brackets 5 and 16) and the support shaft 4
07, a stopper fixing bracket 408 rotatably supported via
Stopper 409 screwed to the support shaft 4
07 and a torsion spring 410 that urges the rotating bracket 402 and the stopper fixing bracket 408 in an opening direction.

By changing the screw-in depth of the adjusting bolt 403, the amount of deflection of the coil spring 406 is adjusted, and the force for locking the stopper 409 and the swing width of the rotating bracket 402 can be changed steplessly. It is a structure that can be done. Note that in FIG.
Is a bolt for restricting rotation of the rotating bracket 402 in a free state.

The stopper 409 and the stopper fixing bracket 408 have an integral stopper (not shown) projecting from the rotating bracket 402 so as not to open at a predetermined angle (for example, a right angle) or more. , The stopper 409, and the support shaft 40 between the stopper fixing bracket 408 and the rotation bracket 402.
7, the force exceeding the urging force of the torsion spring 410 attached to the stopper 7 (the stopper 409 and the stopper fixing bracket 4).
08 and the force in the direction of closing between the rotating bracket 402)
As long as does not work, the angle between the stopper 409 and the stopper fixing bracket 408 and the rotating bracket 402 is maintained at the predetermined angle.

On the upper part of the stopper 409, a U-shaped protective tube support 40 for mounting and supporting the protective tubes 15, 16 is provided.
9a is formed, and the protection tube support portion 409a is
The male ends 15d, 16d of the protective tubes 15, 16 and the protective tubes 15, 16 can pass through, and only the locking projections 15c, 16c of the female ends 15e, 16e of the protective tubes 15, 16 are engaged. It has a possible shape.

The stopper 409 is made of synthetic rubber and locks the protection tubes 15 and 16 so that the protection tubes 15, 1
6 has a hardness enough to withstand the force required to complete the connection between them, and after the connection is completed, further protector tubes 15, 1
6 is pushed in, the female side ends 15 of the first protection tubes 15, 16 due to the elastic deformation of the stopper 409 itself.
e and 16e are released.

Further, the guide section 20 is provided with a straightening guide 50 arranged in a line with each of the receiving rollers 21.
As shown in FIG. 6, the straightening guide 50 is
The intermediate portion of the correction guide body 501 is rotatably supported via a bearing shaft 500, and the correction guide body 501 is rotatable.
Are formed at both ends of the protection pipes 15 and 16 so as to protrude into the transport path (pass line) of the protection pipes 15 and 16, respectively, and are farther from the receiving roller 21 (closer to the junction with the electric wire 9). Spring (projection urging means) 50 for projecting the projection 503 of the protective tube 15 into the transport path of the protection tubes 15 and 16.
4 is provided between the guide portion 20 and the correction guide main body 501, and is schematically configured.

When the protective tubes 15 and 16 are attached to the electric wire 9 using the protective tube insertion machine configured as described above, first, as shown in FIG. With the insertion machine attached, the protection tubes 15 and 16 are gripped by the operating rod, and the male side ends 15d of the protection tubes 15 and 16 are placed with the longitudinal slits of the protection tubes 15 and 16 facing upward. 16 d is pressed against the feed crawler 302 along the protection tube guide 13.

In this state, the hydraulic motor 303 is driven by operating the switching valve to rotate the feed crawler 302 counterclockwise, and the protective tubes 15 and 16 are attached to the electric wire 9. Then, as shown in FIG.
The female side ends 15e and 16e of the feed crawlers 3 and 5
The hydraulic motor 303 is driven by operating the above-mentioned switching valve until it comes away from the position 02 and reaches a position where the protective tubes 15 and 16 cannot be sent any more.

In this case, the protection tubes 15 and 16 are smoothly fed by the rotation of the feed crawler 302 in a state where the inner and outer surfaces thereof are sandwiched between the receiving roller 21 and the feed crawler 302. And the feed crawler 3 made of synthetic rubber
02 by the elastic deformation of itself and the tension set by the adjusting operation of the bolt 309 for adjusting the tension.
The protective tube 1 can flexibly cope with the uneven shape of both ends of
It works to reduce damage to 5 and 16.

The swing arm 306 swings against the urging force of the coil spring 310, so that the
7, the auxiliary pulleys 301 supported by the protective tubes 15, 16
Move according to the uneven shape of both ends of the. Accordingly, in addition to the above-described elastic deformation of the feed crawler 302 itself and the action of the tension bending of the feed crawler 302, it is possible to further flexibly cope with the uneven shape of both ends of the protective tubes 15, 16. Thus, damage to the protection tubes 15 and 16 can be reduced.

In addition, the auxiliary pulley 301 is
Since the position of the feed crawler 302 is adjusted by approaching or separating from the conveyance path of the protection tubes 15 and 16 according to the shapes of the protection tubes 5 and 16, the protection tube 15 is optimally connected to the correction guide 50 at the subsequent stage by a pass line. , 16 can be sent out.

Next, as shown in FIG. 15, the second protective tubes 15, 16 are moved from their male ends 15d, 16d.
In the same manner as the first protection tubes 15 and 16, the hydraulic motor 303 is driven while being pressed against the feed crawler 302 along the protection tube guide 13 to drive the second protection tube 1.
Send out 5 and 16.

At this time, the stopper 40 of the protective pipe connecting device 40
9 is a female end 15e of the first protective tube 15, 16;
16e, which engages with the locking projections 15c, 16c, and serves to stop the second protective tubes 15, 16 from being pushed and moved by the male ends 15d, 16d. 2nd protective tube 1
The male-side ends 15d and 16d of the first and second protection tubes 15 and 16 are smoothly pushed into the female-side ends 15e and 16e of the first protection tubes 15 and 16, so that the two protection tubes 15 and 16 are securely connected to each other. .

After the two protection tubes 15 and 16 are connected to each other in this way, when the second protection tubes 15 and 16 are further pushed out by the feed crawler 302, the protection tube support portion 409a of the stopper 409 becomes elastic. Deformed, that U
The first protection tube 15, 1
The state of engagement with the locking projections 15c, 16c of No. 6 has been released. Then, the two connected protection tubes 15, 16
When the connecting portion passes through the stopper 409, the stopper 40 that has been elastically deformed up to now quickly returns to the initial state (original shape).

By repeating such a procedure, the protective tubes 15, 16 can be securely connected to each other while the protective tubes 15, 16 are smoothly mounted around the electric wire 9. In this case, the rotating bracket 402 of the protection pipe connector 40 swings about the fixed shaft 401 against the urging force of the coil spring 406 during a series of locking operations and passage of the protection pipes 15 and 16. , The stopper 409 conforms to the shape of the protection tubes 15 and 16 and the protection tube 1
5, 16 can be supported and guided accurately.

As a result, the protection pipe connecting operation conventionally performed manually through the operation rod can be performed only by operating the feed crawler mechanism 30. In addition, as described above, the stopper 409 is protected by the coil spring 406. Tubes 15, 1
Since it has an adjusting function according to the shape of 6, the protection tube shape, the tube outer diameter, the hardness that changes with the use environment (temperature),
It was able to flexibly cope with path line fluctuations due to different wire sag between poles, expanding the range of adaptive protection pipes, and significantly improving the reliability of locking connections.

When removing the protective tubes 15 and 16 from the electric wire 9, the stopper 409 of the protective tube connector 40 is required.
However, in this case, as shown in FIG. 16, the stopper 409 engaged with the locking projections 15c, 16c of the protection tubes 15, 16 Is rotated clockwise (in the traveling direction of the protection pipes 15 and 16) around the center and retracts from the transport path of the protection pipes 15 and 16, so that the protection pipes 15 and 16 pass through the stopper 409 without any trouble. To go. Then, the protection pipes 15 and 16 that have passed through the protection pipe connector 40 in this manner.
May be recovered by sequentially disconnecting from each other.

When the protective tubes 15 and 16 do not pass through the transport path, the straightening guide 50 has a pair of projections 502 and 503 that always project into the transport path of the protective tubes 15 and 16. In particular, in particular, the projection 503 on the side near the junction with the electric wire 9 is in a state of being further protruded than the projection 502 by being urged by the coil spring 504.

In this state, as described above, the first protection tubes 15 and 16 are sent out by the feed crawler 302, and the locking projections 15c and 16c of the protection tubes 15 and 16 are moved as shown in FIG. When the stopper 409 is engaged, the projection 503 of the straightening guide 50 is pressed against the inner surfaces of the female ends 15e, 16e of the first protective tubes 15, 16. Therefore, the correction guide main body 501 rotates clockwise around the support shaft 500, and the protrusions 502 are pushed out to the transport paths of the protective tubes 15, 16.

Next, when the male ends 15d and 16d of the second protective tubes 15 and 16 are pressed against the protrusions 502, the feed force of the feed crawler 302 causes the straightening guide body 501 to move around the support shaft 500. The anti-clockwise rotation causes the protruding portion 503 to protrude toward the protection pipes 15 and 16 on the transport path side.

The protrusions 503 protrude into the transport path of the protection tubes 15 and 16, so that the female side ends 15 e and 1 e of the first protection tubes 15 and 16 engaged with the stopper 409.
6e is pushed downward, and the first protective tube 15,
Since the insides of the 16 female-side ends 15e and 16e are pushed open, the male-side ends 15d and 1d of the second protective tubes 15 and 16 are formed.
The 6d ridges 15a, 16a are smoothly pushed into the female ends 15e, 16e of the first protection tubes 15, 16, and the two protection tubes 15, 16 are securely connected to each other.

As a result, when the straightening guide 50 is not provided, the female ends 15e, 16e of the protective tubes 15, 16 and the male ends 15d, 16d of the protective tubes 15, 16 may occur. It is possible to completely prevent a connection error due to abutment between the poles, correct the pass line without being affected by a variation in the pass line due to a wire slackness that varies depending on the distance between the poles, and always carry out a stable connection.

[0045]

According to a first aspect of the present invention, there is provided a protective tube insertion machine for attaching a plurality of protective tubes having slits formed in a longitudinal direction around an electric wire and connecting these protective tubes to each other, An endless feed crawler for moving the protective tube closer to and away from the electric wire is provided along the transport path of the protective tube in a state of being wound around a pair of pulleys. Is provided with a protective tube connecting tool that engages with the locking portion formed at the rear end of the protective tube. Therefore, the protective tube is transported along the transport path by a feed crawler wound around a pair of pulleys. By doing so, it is possible to increase the contact area with the protective tube,
The feed force can be increased and the stability at the time of protection tube feeding can be improved, and by connecting the protection tube connector to the locking portion of the protection tube, the protection tube can be connected at the time of connection. The preceding protection pipe can be securely fixed, and the connection work with the subsequent protection pipe can be performed smoothly. Therefore, the protection pipe connection work conventionally performed manually via the operation rod can be performed only by operating the switching valve as in the related art. As a result, it is possible to eliminate the work error of incomplete connection of the protective pipe caused by manual work, and to reduce the connection work, which was conventionally required from four steps, to two steps. Great effects can be exhibited in improving workability, shortening work time, and reducing labor.

According to a second aspect of the present invention, since the feed crawler is provided with crawler pressing means for pressing the feed crawler against the protective tube, the feed crawler is moved along the transport path by the crawler pressing means. By pressing against the protection tube, the force from the feed crawler can be smoothly transmitted to the protection tube, and the protection tube can be reliably transferred. Therefore, it is possible to flexibly cope with the uneven shape of both ends of the protective tube, so that the stress on the protective tube can be relieved, breakage can be prevented, and the protective tube is sent out with an optimal pass line. be able to.

According to a third aspect of the present invention, since the feed crawler is made of a material which can be elastically deformed, even when the outer surface of the protective tube has irregularities, the feed crawler is elastically deformed to have the irregular shape. By flexibly responding, the protective tube can be reliably transferred.

According to a fourth aspect of the present invention, a protective tube connecting device is provided so as to be capable of approaching and separating from the protective tube transport path and engaging with a locking portion of the protective tube. And stopper urging means for urging toward the transport path of the protection pipe, so that the stopper of the protection pipe connecting portion is urged toward the transport path of the protection pipe by the stopper urging means. In addition to being able to stably support and guide the protection pipe during transfer, when connecting protection pipes, it securely engages with the locking part of the protection pipe on the preceding side and smoothly connects to the protection pipe following. It can be carried out. Therefore, various types of protective pipes, pipe outer diameters, use environment (temperature)
In this way, it is possible to flexibly cope with the variation of the pass line due to the hardness and the wire slackness that varies between the poles, and it is possible to expand the range of the adaptive protective tube, and to significantly improve the reliability of the locking connection.

According to a fifth aspect of the present invention, since the stopper has a U-shaped protection tube support, and the protection tube support is made of an elastically deformable material, the stopper supports and guides the protection tube. When the protection tube support portion is elastically deformed, the engagement of the protection tube with the locking portion after the connection of the protection tubes can be smoothly released.

According to a sixth aspect of the present invention, when the stopper is detached from the electric wire, the stopper is configured to rotate in the transfer direction of the protective tube and to retreat from the transport path of the protective tube. When the protective tube is removed from the electric wire, the stopper is rotated by the transported protective tube in the transfer direction of the protective tube and retracts from the transport path of the protective tube. Without engaging, the protective tube can be smoothly transferred and easily removed from the electric wire.

According to a seventh aspect of the present invention, a straightening guide which is inserted into the inside of the protective tube and supports and guides the protective tube is disposed on the opposite side of the feed crawler with respect to the transport path of the protective tube. Since the inner surface side of the protective tube is supported and guided by the straightening guide inserted into the protective tube being transported by the feed crawler from above, the protective tube can be transported smoothly and the protective tubes can be connected to each other. At times, the transfer posture of the protective tubes can be stabilized, and the protective tubes can be reliably connected to each other. Therefore, by correcting the pass line at the time of locking connection, a connection error due to abutting between ends of the protective tube can be completely eliminated, and a stable connection is always performed without being affected by fluctuation of the pass line. Therefore, the reliability of the locking connection can be remarkably improved.

The straightening guide according to claim 8 of the present invention
Since the intermediate portion of the guide body is swingably supported along the transport path of the protection tube, and both ends of the guide body are provided with projections protruding into the transport path of the protection tube, respectively, When the guide body of the straightening guide swings around the middle part thereof as the pipe passes, the protrusions at both ends of the guide body can be alternately projected into the protection pipe transport path, and the protection pipe Can be corrected, and the female end of the protective tube can be widened to smoothly connect the protective tubes.

According to a ninth aspect of the present invention, when the protective tube is fed toward the electric wire, the projecting portion urging means for urging the projecting portion on the front side of the guide body against the conveying path of the protective tube is provided with the guide member. Since it is provided on the main body, the protrusion on the front side of the guide body protrudes into the transport path of the protection tube, and the projection on the rear side retreats from the transport path of the protection tube by this projection biasing means. By doing so, a sufficient gap can be secured between the rear projection and the feed crawler, and the protective tube can be smoothly fed into the gap. Also, when the first (preceding) protection tube is stopped in front of the feed crawler and the second (succeeding) protection tube is fed in, the tip of the subsequent protection tube is moved to the rear projection. By swinging the guide body in the direction of withdrawing from the transport path of the protection tube, the protrusion on the front side of the guide body protrudes toward the transport path side of the protection tube, and the rear end of the preceding protection tube can be pushed open. It is possible to easily insert the tip of the following protection tube into the rear end of the preceding protection tube.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view of a protective pipe connection device.

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

FIG. 4 is a front view of a feed crawler system.

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

FIG. 6 is a front view of a straightening guide.

FIG. 7 is a front view of a protective tube for building obstruction.

FIG. 8 is a right side view of FIG.

FIG. 9 is a left side view of FIG. 7;

FIG. 10 is a front view of an electric wire protection tube (tree protection tube).

FIG. 11 is a right side view of FIG.

FIG. 12 is a left side view of FIG.

FIG. 13 is a front view of a state in which the tip of the first protection tube is set at the position of a feed crawler.

FIG. 14 is a front view of a state where the rear end of the first protection tube has passed a feed crawler.

FIG. 15 is a front view of a state in which the tip of the second protection tube is set at the position of the feed crawler.

FIG. 16 is a front view showing a state when a protective tube is removed from an electric wire.

FIG. 17 is a front view showing a conventional operation of attaching a protective tube to an electric wire.

[Explanation of symbols]

 9 Electric wire 15 Protective tube for building obstruction (protective tube) 16 Protective tube for electric wire (protective tube for tree, protective tube) 15c, 16c Locking protrusion (locking portion) 30 Feed crawler mechanism 300 Driving pulley 301 Auxiliary pulley 302 Feed crawler 310 Coil spring (crawler pressing means) 40 Protective tube connector 406 Coil spring (stopper biasing means) 409 Stopper 409a Protective tube support 50 Correction guide 501 (Correction) Guide main body 502, 503 Projection 504 Coil spring (with projection) Force means)

Claims (9)

[Claims] 1. A protective tube insertion machine for attaching a plurality of protective tubes having slits formed in a longitudinal direction around an electric wire and connecting the protective tubes to each other, wherein the protective tube is brought close to the electric wire. An endless feed crawler to be separated is provided along the transport path of the protective tube in a state of being wound around a pair of pulleys, and is formed at a rear end of the protective tube adjacent to the feed crawler. A protection tube insertion device, wherein a protection tube connector is provided to engage with the stop. 2. The protective tube insertion machine according to claim 1, wherein the feed crawler is provided with crawler pressing means for pressing the feed crawler against the protective tube. 3. The protective tube insertion machine according to claim 1, wherein the feed crawler is made of an elastically deformable material. 4. A protection pipe connecting device is provided so as to be able to approach and separate from a transport path of the protection pipe, and is provided with a stopper which engages with a locking portion of the protection pipe. 4. A protective tube insertion machine according to claim 1, further comprising stopper urging means for urging the protective tube toward the protection tube. 5. The protection tube according to claim 1, wherein the stopper has a U-shaped protection tube support, and the protection tube support is made of an elastically deformable material. Insertion machine. 6. The protection tube according to claim 1, wherein when the protection tube is detached from the electric wire, the stopper is rotated in a direction in which the protection tube is transported and retracts from a transport path of the protection tube. 6. The protective tube insertion machine according to 3, 4, or 5. 7. The correction guide inserted into the protection tube and supporting and guiding the protection tube is disposed on the side opposite to the feed crawler with the conveyance path of the protection tube interposed therebetween. 7. The protective tube insertion machine according to 2, 3, 4, 5 or 6. 8. The straightening guide, wherein an intermediate portion of the guide main body is swingably supported along a transport path of the protective tube, and projecting portions projecting into the transport path of the protective tube are provided at both ends of the guide body. 3. The method according to claim 1, wherein:
The protective tube insertion machine according to 3, 4, 5, 6, or 7. 9. The guide body is provided with a projection urging means for urging the front protrusion of the guide body against the transport path of the protection tube when feeding the protection tube toward the electric wire. The protective tube insertion machine according to claim 1, 2, 3, 4, 5, 6, 7, or 8.