JP2013062990A - Insertion/extraction device for protective tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insertion/extraction device for a protective tube which can easily, promptly and surely perform insertion/extraction work without damaging the protective tube and a drive roller while freely swinging the drive roller toward an advancing/retreating direction of the protective tube to rotationally drive the drive roller and properly adjusting contact pressure of the drive roller in accordance with an external diameter and an external shape of the protective tube at all times.SOLUTION: A fixed holding piece 4 and a movable holding piece 8 are vertically arranged facing each other on a substrate 1 so as to hold an overhead line 24 therebetween, a substantially triangular plate shape guide body 11 is attached to a lower end of the movable holding piece 8 so as to guide the protective tube 25 in right and reverse directions with respect to the direction of the overhead line 24, a drive roller 17 which can be driven by a rotation operation rod 22 is arranged on a lower side of the guide body 11 so as to advance/retreat by pressing against an outer peripheral surface of the guided protective tube 25, and the drive roller 17 is pivotally attached to the substrate 1 in a suspended manner through an attachment member 18 so as to swing toward the advancing/retreating direction of the protective tube 25.

Description

The present invention relates to a protection tube insertion / removal device used for inserting / removing a protection tube to / from an overhead wire such as a transmission / distribution line installed between utility poles.

2. Description of the Related Art Conventionally, in an overhead line that is in contact with or possibly in contact with a tree or a building, a protective pipe such as a poly pipe or a protective pipe for insulated wires is attached to protect the overhead line.
The protective tube is formed with slits for expansion along the longitudinal direction of the synthetic resin protective tube body having elasticity, and a pair of closing leg pieces are formed along both ends of the slit. And it consists of a structure in which a coupling joint is formed at one end.

By the way, as an example of the protective tube insertion / removal device, Japanese Patent Application Laid-Open No. 2002-199528 and Japanese Patent Application Laid-Open No. 2005-261107 disclose that a fixed holding piece and a movable holding piece are vertically arranged on a required base to be held by an overhead wire. A substantially triangular plate-shaped guide body is attached to the lower end of the movable holding piece to guide the protective tube in the forward and reverse directions with respect to the overhead line direction, and the protective body guides below the guide body. The drive roller is used to move forward and backward by pressing against the outer peripheral surface of the pipe.
There is described one having a basic structure in which a roller is arranged to be driven by a rotary operation rod.

The protective tube insertion / removal device having such a basic structure can be held on a required overhead wire via a fixed holding piece and a movable holding piece, and the protective tube is fitted around the guide body by an insulating operation rod. After inserting the tip between the lower end of the guide body and the drive roller,
The protective tube is sent out in the direction of the overhead wire while rotating the drive roller in a predetermined direction via the rotary operation rod, and is attached to the overhead wire in an outer fitting manner while being expanded through the slit.
Similarly, the following protective pipes are sequentially guided to the guide body and sent out by the drive roller, and are attached to the overhead wire while being fitted and connected to the rear end of the preceding protective pipe via the joint. is there.

Conversely, when removing the protective tube attached to the overhead wire, the guide roller is sequentially guided from the protective tube on the rear end side and the drive roller is driven to rotate in the specified direction. It is extruded and removed.

Japanese Patent Laid-Open No. 2002-199528 JP-A-2005-261107

By the way, the above conventional protective tube insertion / removal device allows the protective tube to be moved forward and backward with the drive roller while being guided by the guide body, and the protective tube is easily and securely attached to and removed from the overhead wire as appropriate. Is something you can do.
However, since the drive roller constituting such a protective tube insertion / removal device is rotatably attached to a predetermined position of the base body via a drive shaft, the axial attachment position is always fixed. Thus, even when the drive roller is driven to rotate by the rotary operation rod, the pressure contact force cannot be changed freely. For this reason, not only when the outer diameter of the protective tube main body and the joint in the protective tube is different, but also when there is unevenness in the connection between the protective tubes, the drive roller is always placed on the outer peripheral surface of the protective tube. A large amount of repulsive force from the side of the protective tube that comes into contact with the drive roller is likely to occur, especially at the connection point between the protective tubes, and in some cases, it is connected to the adjacent protective tube. There is a risk that the condition will be lost and the protective tube insertion / removal operation may be interrupted. Even when the protective tube does not come off, an excessive load is applied to the drive roller, which may cause excessive wear on the surface of the drive roller or damage the drive shaft. Is.

In JP-A-2002-199528, the rotation operation portion of the drive roller can be adjusted in the axial direction through a required angle adjusting means. It is not intended to adjust the pivoting position, but merely to adjust the direction of the rotary operation unit in accordance with the position where the operator stands.

The present invention solves the conventional problem, and the drive roller is driven to rotate while being freely swung in the advancing / retreating direction of the protective tube by the operating rod, and is always driven corresponding to the outer diameter and outer shape of the protective tube. It can be inserted and removed while properly adjusting the roller pressure contact force.
It is an object of the present invention to provide a protection tube insertion / removal device that can be easily and quickly inserted / removed without damaging the protection tube and the drive roller.

In order to achieve the above object, according to the first aspect of the present invention, a fixed holding piece and a movable holding piece are vertically opposed to a required base so as to be held by an overhead wire. The lower end is fitted with a substantially triangular plate-shaped guide body to guide the protective tube in the forward and reverse direction with respect to the overhead line direction, and is moved forward and backward by pressing against the outer peripheral surface of the protective tube to be guided below the guide body. In a protective tube insertion / removal device in which a drive roller is disposed so as to be freely driven by a rotary operation rod, the drive roller is provided with a base member via an attachment member so as to swing in the advancing / retreating direction of the protective tube. The gist of the protective tube insertion / removal device is characterized in that it is attached in a suspended manner.

According to a second aspect of the present invention, in the protective tube insertion / removal device according to the first aspect, the mounting member has a required number of height adjustment shaft holes for adjusting the height of the drive roller. The gist of the protection tube insertion / removal device is characterized by being formed.

According to a third aspect of the present invention, there is provided a protective tube insertion / removal device according to the first aspect, wherein the drive roller
The gist of the ra is a protective tube insertion / removal device, which is detachable through an attachment member.

Since the invention according to claim 1 of the present invention is configured as described above, the drive roller is driven to rotate while being freely swung in the advancing and retreating direction of the protective tube by the rotary operation rod, and the outer surface is always outside. It can be inserted / removed while appropriately adjusting the pressure contact force of the drive roller corresponding to the outer shape of the protective tube as well as the protective tubes having different diameters. For this reason, not only can the protective tube be inserted and removed easily and quickly and reliably, but there is no risk of damaging the protective tube and the drive roller.

Since the invention according to claim 2 of the present invention is configured as described above, the height of the drive roller can be freely adjusted by adjusting the mounting position of the mounting member via the height adjusting shaft hole. In other words, the height of the drive roller can be adjusted according to the outer diameter of the protective tube, and can be inserted / removed with an appropriate pressure contact force.

Since the invention according to claim 3 of the present invention is configured as described above, the drive roller can be freely attached and detached via an attachment member. If the drive roller interferes with the work at the start, the drive roller can be removed via the mounting member, and the required work can be performed smoothly.

It is a front view which shows one Example of this invention. FIG. 2 is a perspective view of FIG. 1. It is the A section enlarged view of FIG. It is a right view of FIG. FIG. 2 is a perspective right side view of FIG. 1. It is a front view which shows the attachment state of the protection pipe | tube 25. FIG. It is a front view which shows one Example of another invention. It is a front view which shows one Example of another invention. It is the B section enlarged view of FIG. It is a front view which shows one Example of another invention. It is the C section enlarged view of FIG.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail based on one Example shown on drawing.

FIG. 1 to FIG. 6 show an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a long upper horizontal arm 2 and a short lower horizontal arm 3 at predetermined intervals in the vertical direction. And 4 is a fixed holding piece of a required length attached to the front of the base 1 so as to be orthogonal to the upper horizontal arm 2 of the base 1 and 5 is fixed. A curved holding surface 6 formed on the lower surface of the holding piece 4 along the longitudinal direction, 6 is a sharp protection tube removal auxiliary member formed at the tip of the fixed holding piece 4, 7
Is an overhead wire guide member attached to the inner edge of the fixed holding piece 4 so as to properly guide the overhead wire 24 to be described later to the holding surface 5, and 8 is below the fixed holding piece 4 so as to face the fixed holding piece 4. A movable holding piece having a required length disposed in an upward direction, 9 is a curved holding surface formed on the upper surface of the movable holding piece 8, and 10 is a sharp point formed at the tip of the movable holding piece 8. The movable holding piece 8 is formed to be slightly longer than the fixed holding piece 4 and can be moved up and down via a rotating operation rod (not shown) by an operation screw shaft 15 described later. It is supposed to be free.

  Reference numeral 11 denotes a substantially triangular plate-like guide body attached to the lower end portion of the movable holding piece 8 along the longitudinal direction of the movable holding piece 8 so as to guide a protective tube 25 to be described later in the forward and backward directions with respect to the direction of the overhead wire 24. A required number of rollers 13, which are arranged in a downward projecting manner at the lower end of the guide body 11 to correspond to the drive roller 17, are formed at the front portion of the guide body 11 to receive the overhead wire 24. A receiving part 14 having a circular arc cross section is an insertion rod for a protective tube extending along an extension line of the rear end part of the guide body 11. 15 is an operation screw shaft of a required length inserted between the upper and lower horizontal arms 2 and 3 to move the movable holding piece 8 up and down, and 16 is an operation to connect to a rotating operation rod (not shown). It is a connection fitting attached to the lower end of the screw shaft 15.

Reference numeral 17 denotes a drive roller which is attached to the lower surface of the guide body 11 via a substantially triangular attachment member 18 so as to be moved forward and backward by being pressed against the outer peripheral surface of the protective tube 25 to be inserted and removed. The tread surface of the roller 17 is made of a material having a large friction coefficient such as rubber or synthetic resin, and the mounting member 18 directs the drive roller 17 in the advancing and retracting direction of the protective tube 25. In order to make it swing, it is pivotally attached to the base body 1 via a swing shaft 19. 20 is a bearing of a swing shaft 19 disposed on the base 1, 21 is a gear mechanism comprising a bevel gear provided in a mounting member 18 for rotating the drive roller 17 forward and reverse, and 22 This is a rotary operation rod connected via a connection fitting 23 to drive the gear mechanism 21.
In addition, 24 is an overhead wire such as a power transmission / distribution cable installed between power poles, and 25 is a protection pipe such as a poly pipe or a protection pipe for insulated wires.

Next, the operation of the embodiment configured as described above will be described.
First, when attaching the protective tube 25 to the overhead wire 24, a rotating operation rod (not shown) is connected to the operation screw shaft 15 via the connection fitting 16, and the required overhead wire 2 is connected via the rotation operation rod.
4 approach. Next, the holding surface 9 is moved over the overhead wire 2 while being guided by the guide member 7.
4, the fixed holding piece 4 is hooked on the overhead wire 24 to be supported, and the rotary operation rod
The movable holding piece 8 is raised while rotating the operating screw shaft 15 in a predetermined direction (not shown), and the overhead wire 24 is held between the fixed holding piece 4. When the holding of the overhead wire 24 is completed, the leg portion is held upward by an insulating operation rod (not shown), and the protective tube 25 is inserted into the insertion rod 14 while being directed toward the distal end side from the rear end side of the guide body 11. The tip of the guide body 11 is pushed between the lower end surface of the guide body 11 and the tread surface of the drive roller 17. Next, the roller 12 of the guide body 11 is brought into contact with the inner peripheral surface of the protective tube 25 and the swing shaft 1 is moved.
Using 9 as a fulcrum, the drive roller 17 is appropriately swung in the advancing / retreating direction of the protective tube 25 by the rotary operation rod 22, and is rotated in a predetermined direction and sent out in the direction of the overhead wire 24. Then, the protective tube 25 is attached to the overhead wire 24 in an outer fitting manner while being expanded outward from the tip of the protective tube 25 sequentially. In the same manner, the succeeding protective tube 25 is sequentially inserted into the guide body 11 via the insertion rod 14 in an outer fitting manner, and is connected to the joint portion of the preceding protective tube 25 in a fitting manner.
The rotor 17 is driven to rotate while being swung appropriately and sent out in the direction of the overhead wire 24.
Attach to the outside. At this time, the drive roller 17 is rotationally driven while being appropriately swung in the advancing / retreating direction of the protective tube 25 with the rocking shaft 19 as a fulcrum, as shown by a one-dot chain line in FIG. The protective tube 25 can be mounted easily, quickly and reliably while appropriately adjusting the pressure contact force of the drive roller 17 corresponding to the protective tube 25 having a different diameter or the outer shape of the protective tube 25. I can do it.

When the attachment of the protective tube 25 is completed, the movable holding piece 8 is moved downward while rotating the operating screw shaft 15 in a predetermined direction by a rotating operation rod (not shown), and the holding of the overhead wire 24 is released and removed.

On the contrary, when the protective tube 25 attached to the overhead wire 24 is removed, the overhead wire 24 is held between the fixed and movable holding pieces 4 and 8 by the same operation as described above. After that, it is expanded outward from the rear end of the protective tube 25 sequentially through the slit, and inserted into the guide body 11 via the auxiliary auxiliary members 6 and 10 so as to be fitted into the outer periphery of the guide body 11. Push between the tread surface of the drive roller 17. Then, the roller 12 is brought into contact with the inner peripheral surface of the protective tube 25, and the drive roller 17 is rotationally driven in a predetermined direction while being appropriately swung by the rotating operation rod 22 with the rocking shaft 19 as a fulcrum. The protective tube 25 is sequentially removed from the overhead wire 24.

FIG. 7 shows another embodiment of the present invention. In order to adjust the height of the drive roller 17 at the front portion of the mounting member 18, the shaft holes 26a and 26b of the swing shaft 19 are spaced at a predetermined interval. However, the points formed vertically are different from those of the above embodiment, the other parts are the same, and the same reference numerals indicate the same parts.
In the embodiment constructed as described above, the drive roller 17 is pivotally mounted with the swing shaft 19 in the required shaft holes 26a and 26b corresponding to the outer diameter of the protective tube 25. The protective tube 25 is inserted and removed while the height of the tube is properly adjusted and the pressure contact force is properly maintained.

FIGS. 8 and 9 show another embodiment of the present invention. In the front portion of the mounting member 18, shaft holes 27a and 27b of the swing shaft 19 are provided to adjust the height of the drive roller 17. FIG. It differs from the above-described embodiment in that it is formed so as to communicate obliquely upward, the other parts are the same, and the same reference numerals indicate the same parts.
In the embodiment configured as described above, the shafts 27a and 27b are pivotally attached to the required shaft holes 27a and 27b by the swing shaft 19 corresponding to the outer diameter and outer shape of the protective tube 25, and the drive roller The protective tube 25 is inserted / removed while the height of the rail 17 is properly adjusted and the pressure contact force is properly maintained.

FIGS. 10 and 11 show another embodiment of the present invention. The drive roller 17 is attached to the front end of the mounting member 18 so as to be freely attached and detached via the mounting member 18. Unlike the above-described embodiment, the hole 28 is formed, and the pivot shaft 19 is fitted to the shaft hole 28 while being detachably mounted with the mounting pin 29, and the other parts are the same. The same reference numerals indicate the same parts.
In the embodiment configured as described above, the drive roller is set at the start of insertion / removal of the protective tube 25.
The rack 17 is removed when it interferes with the work, and the required work is performed smoothly.

In the above embodiment, the two shaft holes 26 are used to adjust the height of the drive roller 17.
Although a, 26b, 27a, and 27b are formed at the tip of the mounting member 18, the number is not limited to this number, and the number may be increased as necessary.

DESCRIPTION OF SYMBOLS 1 Base body 2 Fixed clamping piece 8 Movable clamping piece 11 Guide body 17 Driving roller 18 Mounting member 22 Rotating operation rod 24 Overhead wire 25 Protective pipe 26a, 26b Shaft hole 27a, 27b Shaft hole 28 Shaft hole 29 Mounting pin

Claims (3)

A fixed holding piece and a movable holding piece are vertically opposed to a required base to be held by an overhead wire, and a protective tube is guided at the lower end of the movable holding piece in the forward and reverse directions with respect to the overhead wire direction. A substantially triangular plate-shaped guide body is attached, and a drive roller is disposed below the guide body so as to be driven by a rotary operation rod so as to be moved forward and backward by being pressed against the outer peripheral surface of the protective tube to be guided. In the protective tube insertion / removal device, the drive roller is mounted in a suspended manner on the base via an attachment member so as to swing in the forward / backward direction of the protective tube. Escaper. 2. The protective tube insertion / removal device according to claim 1, wherein the mounting member is formed with a required number of height adjusting shaft holes for adjusting the height of the drive roller. Pipe insertion / removal device. 2. The protective tube insertion / removal device according to claim 1, wherein the drive roller is detachable through an attachment member.

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