JP2000197226A - Protective pipe attaching/detaching guide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective pipe attaching/detaching guide with which a protective pipe is not caught, when the duct is attached to or detached from an electric wire and which can surely clamp the wire, regardless of the diameter of the wire. SOLUTION: A protective pipe attaching/detaching guide 41 is provided with an electric wire pinching section 43 which pinches an electric wire D, a protective duct guiding member 45 which is positioned beside the section 43, guides a protective pipe to the wire D, and detaches the protective pipe attached to the wire D, and a connecting plate 47 which connects the pinching section 43 to the guide member 45. The guide 41 is also provided with a pair of fixing plates 49 which fix the pinching section 43. The front end section of the pinching section 43 is provided with an inclined surface 63, which inclines as going toward the rear end side and a pressing member 69 which evenly presses the clamped wire D. In addition, a projecting section 35 is provided on the connecting plate 47, at a position facing an upper clamping section 51 on the pinching section 43 side. Moreover, a guiding inclined surface 65 is provided at the front end section of the member 45, so as to facilitate the smooth insertion of the wire D into the guide member 45, even if the diameter of the wire D is small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective tube mounting and dismounting guide, and more particularly, to a protective tube mounting and dismounting guide for inserting and removing a protective tube for covering the outer periphery of an electric wire suspended between electric poles.

[0002]

2. Description of the Related Art When construction work or the like is performed near an electric wire erected between electric poles, it is necessary to prevent work machinery from contacting the electric wire during the work and to secure work safety and protect the electric wire. In addition, the outer periphery of the electric wire near the work site is covered with an insulating protective tube (so-called "poly tube"). This protective tube is cylindrical and has a main body and a connecting portion, and the connecting portion is attached to one end of the main body. The side wall of the main body has an opening that opens from one end to the other end, and a pair of flanges that protrude radially outward from both ends of the opening and are arranged opposite to each other. At both ends of the main body, locking projections are provided which protrude radially outward. The connecting portion has an insertion portion whose both ends are expanded in a trumpet shape, and a locking portion having a locking concave portion that is sandwiched between the insertion portions and has a cylindrical shape and locks the locking projection of the main body portion inside. ing. The connection portion is provided with an opening that opens from one insertion portion to the other insertion portion, and is provided with a pair of flange portions that protrude radially outward from both ends of the opening portion and are arranged opposite to each other. I have. The connecting portion is fixed to the main body by inserting the end of the main body into one of the insertion portions of the connecting portion and locking the locking projections of the main body with the locking recesses of the connecting portion. Also, if you want to protect the wire over a wide area,
The main body of another protective tube is inserted into the connecting part of the protective tube to connect the protective tubes.

[0003] In order to attach the protective tube to the electric wire, an aerial work vehicle (not shown) having a work table at the tip end of a telescopic boom provided on the vehicle body so as to be able to move up and down and swing is generally used.
This is performed by a protective tube mounting device 83 provided on a vertical post 81 connected to the distal end of the telescopic boom 9 shown in FIG. Here, the protection pipe mounting device 83 is provided with a feeding mechanism 85 for feeding the protection pipe 25 to the electric wire D, a protection pipe mounting / dismounting guide 87 for holding the electric wire D and guiding the movement of the protection pipe 25, and a protection pipe mounting / disconnecting guide 87. And between the feeding mechanism 85 and the protection pipe 25.
From the feeding mechanism 85 to the protection pipe mounting / dismounting guide 87.

As shown in FIG. 7, a protective tube insertion / removal guide 87 guides the protective tube to the electric wire D and connects the protective tube attached to the electric wire D to the electric wire D. A protection pipe guide member 91 for guiding in a direction to be detached from D, a connection part 93 for connecting between the wire gripping part 89 and the protection pipe guide member 91, and a pair of fixing plates 95 for fixing the pair of wire gripping parts 89. Have.

[0005]

However, FIG.
At the tip of the wire gripping portion 89 shown in FIG.
9, the protection pipe guide member 91
An inclined surface 97 inclined to the side is formed, and when the electric wire D is incompletely gripped by the electric wire gripping portion 89 or when the electric wire D has a projection or the like, the electric wire gripping portion 89 shown in FIG. A gap 99 is formed between the electric wires D. In this state, when the protective tube 25 attached to the electric wire D is inserted into the protective tube mounting / dismounting guide 91, the protective tube main body 25b of the protective tube 25 shown in FIG. When moving in the direction away from D, the protection tube flange 25a of the protection tube 25 enters the gap 99 formed above the electric wire D, and
Stops, and the operation of pulling out the protection tube 25 is interrupted.

When the wire D is incompletely gripped by the wire gripping portion 89 or when the wire D has a protrusion or the like, as shown in FIG. A gap 37 may occur. In such a state, the protective tube 25
Attempting to attach the protective tube 25 to the electric wire D, the protective tube flange 25a of the protective tube 25 enters the gap 37 and stops the mounting operation of the protective tube 25. Further, when there are many kinds of diameters of the electric wire D, it is necessary to use the electric wire D
A protection pipe mounting / dismounting guide 87 corresponding to the type is required.

Further, when electric wires D having different diameters are sandwiched by the same protective pipe mounting / dismounting guide 87, a gap 101 is formed between the electric wire D and the protective pipe guide member 91 as shown in FIG.
When the protective tube 25 attached to the electric wire D is to be detached from the electric wire D, the distal end of the protective tube 25 comes into contact with the distal end of the protective tube guide member 91 to interrupt the detaching operation.

Further, as shown in FIG. 9C, the relationship between the protective tube guide member 91 and the electric wire D is such that the shaft core of the electric wire D and the protective tube when the electric wire D of a certain diameter is gripped by the electric wire gripping portion. The guide member 91 is configured so that the central axis in the width direction is on the same plane. However, when the wire D having a different diameter is gripped by the protective tube mounting / dismounting guide, the shaft core of the wire D and the protective tube are removed. Since the center axis in the width direction of the guide member 91 is displaced, when the protection tube 25 attached to the electric wire D is inserted into the protection tube guide member 91 to be detached from the electric wire D, the tip of the protection tube 25 Abuts on the distal end of the protective tube guide member 91 to interrupt the attachment / detachment operation. For this reason, there arises a problem that it is necessary to prepare as many protective tube mounting and dismounting guides as the number of diameters of the wire D to be gripped.

The present invention has been made in view of such a problem, and when the protective tube is detached from the electric wire and attached to the electric wire, the operation is continued without the protective tube being caught by the protective tube mounting / dismounting guide. It is another object of the present invention to provide a protective tube mounting and dismounting guide capable of securely holding an electric wire regardless of the type of the diameter of the electric wire.

[0010]

In order to solve the above-mentioned problems, a protective tube mounting / dismounting guide according to the present invention is provided with one end of a side wall of a cylindrical main body (for example, a protective tube main body 25b in the embodiment). And a pair of flanges projecting radially outward from both ends of the opening and facing each other (for example, the protective tube flange 25 in the embodiment).
a) Opening the flange portion of the protective tube having the above, inserting the electric wire into the main body portion, attaching the protective tube to the electric wire, and opening the flange portion of the protective tube attached to the electric wire, and detaching the protective tube from the electric wire. A protection tube mounting / removing guide for holding the electric wire, the electric wire holding means having an inclined surface at one end having a slope gradually inclined in a direction away from the electric wire as it advances toward the other end (for example, the embodiment) And the wire holding portion 43), which is connected to the wire holding means, protrudes forward from one end of the wire holding means, and has a leading end close to the peripheral wall of the wire gripped by the wire holding means and the other end of the wire holding means. It is preferable to have a protective tube guide member which separates from the electric wire clamping means as it proceeds to the part side.

In the case where the wire holding means is incompletely gripped by providing an inclined surface at one end of the wire holding means, which is gradually inclined in a direction away from the wire as it goes to the other end side. If there is a gap between the wire and the wire clamping means, and the protective tube attached to the wire is moved toward the protective tube loading / un-guiding The wire moves in a direction away from the electric wire while being expanded by the peripheral edge of the inclined surface, so that the electric wire does not enter the gap. For this reason, the work of attaching and detaching the protective tube from the electric wire can be performed continuously, and the working efficiency can be improved. Further, it is preferable that the distal end of the protective tube guide member is located on the front side of one end of the electric wire clamping means. That is, it is preferable that the distal end of the protective tube guide member be located in a direction protruding from one end of the electric wire clamping means. This is because the protection tube can be easily inserted into the protection tube guide member. Also, the tip of the protective tube guide member only needs to protrude from one end of the wire clamping means,
The projecting amount of the protection tube guide member may be small.

The electric wire holding means has a pair of gripping members (for example, an upper gripping portion 51 and a lower gripping portion 53 in the embodiment) movable toward and away from each other. A connecting member (for example, the connecting plate 47 in the embodiment) connected to the protective tube guide member is connected, and the connecting member has a convex portion on an end portion on one gripping member side and facing the other gripping member. Is preferred. If the wire is held incompletely by the wire holding means, or if the wire has protrusions, etc., and a gap is formed between the wire holding means, and a protective pipe is inserted along the protection pipe guide member, A convex part provided in the vicinity forcibly changes the moving direction of the tip of the protective tube and expands the protective tube, so that the protective tube is not inserted into the gap and the protective tube is easily attached to the electric wire. be able to. The convex portion is preferably provided in the same direction as the direction in which the gripping member is extended. For example, the convex portion may be extended in a rod shape or provided in a plurality of points.

[0013] It is preferable to have a pressing member for pressing the electric wire against one of the pair of holding members when the electric wire is held between the pair of holding members of the electric wire holding means. Since the electric wire can be pressed against one of the pair of gripping members by the electric wire clamping means, the electric wire can be brought into close contact with the tip of the protective tube guide member. Since it is gripped in a state of being closely contacted between the gripping members, there is no need to prepare a protective tube mounting / dismounting guide of the same kind as the diameter of the electric wire, which is economical.

The pressing member has a pair of rotatable rotating portions, one rotating portion is provided on one of the pair of gripping members, and the other rotating portion is provided on the other of the pair of gripping members. Are arranged opposite to each other, and have a concave portion and a convex portion at the tip of the rotating portion. When the tip portions of the pair of rotating portions abut against each other, the convex portion of one of the rotating portions becomes the other. It is preferable that the convex portion of the other rotating portion engages with the concave portion of one rotating portion. When an electric wire is inserted through the pair of gripping members and the pair of gripping members are moved in a direction approaching each other, the concave portion and the convex portion at the distal end of one rotating portion become the convex portion at the distal end of the other rotating portion. And the recess. And one convex part presses the other concave part, and the other convex part presses one concave part, and a pair of rotation parts cooperate uniformly and press an electric wire uniformly. Therefore, regardless of the diameter of the wire, the wire can be reliably gripped by the wire holding means without any gap.

An inclined surface (for example, the guide inclined surface 65 in the embodiment) which is gradually inclined upward toward the base end of the protective tube guide member at the distal end of the protective tube guide member.
It is preferable that the end on the tip end side of the inclined surface is disposed on a surface lower than the upper end of the electric wire when the electric wire having the smallest diameter among the electric wires held by the electric wire holding means is held. A state in which the minimum-diameter wire is gripped by arranging the end on the leading end side of the inclined surface on a surface below the upper end of the wire when the minimum-diameter wire is gripped by the wire gripping means. When the protective tube attached to the electric wire is detached by moving the protective tube in the direction of the protective tube guide member, the tip of the protective tube always comes into contact with the inclined surface. For this reason, since the protective tube moves along the inclined surface, the protective tube can be detached from the electric wire. Also, in the prior art, in which the central axis of the electric wire and the central axis in the width direction of the protective tube guide member were on the same plane, it was necessary to provide a protective tube mounting / dismounting guide of the same type as the diameter of the electric wire. In comparison, even if the kind of the diameter of the electric wire changes, it can be dealt with by a single protection pipe installation / removal guide, which is extremely economical.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS. This embodiment shows an aspect of an aerial work vehicle having a worktable at a distal end of a telescopic boom that is telescopic and pivotable on a vehicle body. Before describing the protection pipe mounting / dismounting guide of the present invention, an aerial work vehicle equipped with the protection pipe mounting / dismounting guide will be described. Aerial work vehicle 1
As shown in FIG. 1, an outrigger jack 5 that stably supports the vehicle body 3 on the side of the vehicle body 3, a revolving base 7 that protrudes from the upper rear side of the vehicle body 3 and is provided to be freely rotatable, and
A telescopic boom 9 pivotally pivoted upward and downward,
A workbench 11 provided at the distal end of the telescopic boom 9; An up-and-down cylinder 13 is swingably connected between the telescopic boom 9 and the swivel 7 so that the telescopic boom 9 is raised and lowered by the expansion and contraction operation of the up-and-down cylinder 13.

A vertical post (not shown) is provided at the distal end of the telescopic boom 9 so as to be vertically swingable, and the lower end of the vertical post is provided with a leveling cylinder (not shown) built in the distal end of the telescopic boom 9. Connected). The leveling cylinder operates in conjunction with the extension / retraction operation of the up / down cylinder 13, and extends / contracts so that the vertical post is always kept vertically regardless of the up / down angle of the extension / retraction boom 9. For this reason,
The worktable 11 is always kept horizontal. A sub-boom 15 is provided above the vertical post. The sub-boom 15 has a winch 17 at its base, and a bent arm mechanism 19 is provided at the tip of the sub-boom 15.
The wire W fed from the winch 15 is the sub-boom 1
5 is wound around a sheave 21 provided at an intermediate portion and an end portion of the arm mechanism 19, and the end portion is connected to a bottomed cylindrical housing box 23, and the housing box 23 is suspended. I have. A large number of protective tubes 25 are housed in the housing box 23. An operator M is mounted on the workbench 11, and the operator M uses a work implement such as a hot stick 27 to mount and dismount the protective tube 25.

The arm mechanism 19 is provided with a protective tube mounting device 29. The protection pipe mounting device 29 includes a feed-out mechanism 31 for feeding the protection pipe 25 to the electric wire D, and a protection pipe mounting / dismounting guide 41 for attaching the protection pipe 25 to the electric wire D while holding the electric wire D and detaching the protection pipe 25 from the electric wire D. And the protective tube mounting and dismounting guide 41
The protective tube 25 is connected to the feeding mechanism 31 and the feeding mechanism 31.
And a guide member 33 that guides the protection tube to the protection tube mounting / removing guide 41 from the front. The feeding mechanism 31 has a front feeding mechanism 31a and a rear feeding mechanism 31b, and each feeding mechanism 31a, 31b has a pair of rollers (not shown) arranged to face each other. The protective tube flange 25a of the protective tube 25 shown in FIG. 2 is sandwiched between these rollers, and the protective tube 25 can be drawn out toward the protective tube mounting / dismounting guide 41 by rotating the rollers.

The protective tube 25 is formed of an elastic insulating material and includes a cylindrical main body 25b and a protective tube flange 25a. The main body 25b has an opening 25c that opens from one end to the other end, and a pair of protective tube flanges 25a protruding radially outward and disposed close to each other at both ends of the opening 25c. Is provided. The guide member 33 connecting the protective tube loading / unloading guide 41 and the feeding mechanism 31 shown in FIG. 1 is made of an insulating material such as polyethylene having elasticity and flexibility, and has a cylindrical guide body shown in FIG. 3
3a and a guide flange 33b protruding radially outward from the guide body 33a. Guide body 3
The diameter of the protective tube 3a is formed so that the protective tube 25 can slide and move. The guide flange 33b is slid while the protective tube 25 is inserted between the protective tube flanges 25b of the open protective tube 25. It has a movable thickness.

Next, the protection pipe mounting / dismounting guide 41 of the present invention will be described. 3A and 3B show a protection pipe mounting / dismounting guide 41, FIG. 3A shows a bottom view of the protection pipe mounting / dismounting guide 41, and FIG. FIG. 3C is a plan view of a portion corresponding to the arrow III in FIG. As shown in FIG. 3A, the protection tube mounting / dismounting guide 41 includes an electric wire holding portion 43 for holding the electric wire D, and is disposed above the electric wire holding portion 43 to guide the protection tube 25 to the electric wire D and to connect the electric wire D to the electric wire D. D, a protection tube guide member 45 for attaching and detaching the protection tube 25, a connection plate 47 for connecting the wire holding portion 43 and the protection tube guide member 45, and a wire holding portion 4.
3 and a pair of fixing plates 49 for fixing the fixing plate 3.

As shown in FIG. 3B, the electric wire holding portion 43 has an upper grip portion 51 and a lower grip portion 53 formed in two parts in the vertical direction (left and right directions in FIG. 3B). are doing. The upper grip 51 and the lower grip 53 are arc-shaped,
They are arranged so that they can approach and separate from each other. A connecting plate 47 is connected to one side (upper side in FIG. 3B) of the lower gripping section 53, and to the other side (lower side in FIG. 3B) of the upper gripping section 51 and the lower gripping section 53. The upper fixed plate 55 and the lower fixed plate 57 are connected. At the ends of the upper fixing plate 55 and the lower fixing plate 57, female screws 59 threaded inward in the left-right direction are provided. Male screws 61 are screwed into these female screws 59, and the upper gripping portion 51 and the lower gripping portion are provided. When the male screw 61 is rotated by disposing the electric wire D between the upper fixing plate 55 and the lower fixing plate 57, the upper grip portion 51 and the lower grip portion 53 are interposed.
Can approach and separate from each other to pinch or open the wire D. In addition, the distal end of the electric wire holding portion 43 has an inclined surface 63 that is gradually inclined toward the fixed plate 49 as it proceeds from the distal end to the proximal end side, as shown in FIG.

The connecting plate 47 is wedge-shaped and has a top on the left side. A protective tube guide member 45 is provided on a side of the connecting plate 47 formed opposite to the side to which the electric wire holding portion 43 is fixed. As shown in FIG. 7B, a convex portion 35 protruding upward is provided on an end of the connecting plate 47 on the side of the electric wire holding portion 43 and opposite to the upper holding portion 51.
When the protective tube 25 attached to the electric wire D is attached and detached by the convex portion 35, the tip of the protective tube 25 is formed between the upper grip portion 51 and the lower grip portion 53 and enters the gap 37 shown in FIG. Can be prevented.

As shown in FIG. 3C, the protection tube guide member 45 has a plate-like shape, and its distal end projects forward from the distal end of the electric wire holding portion 43. FIG. 4 shows the relationship between the tip shape of the protection tube guide member 45 and the diameter of the electric wire D, and FIG. 4A is a plan view of a portion corresponding to the arrow III in FIG. FIG. 2B shows a state where the wire D having the smallest diameter among the wires D held by the wire holding portion 43 is held, and FIG. 2C shows the state of the wire D held by the wire holding portion 43. The state when the largest diameter wire D is held is shown. The protection pipe guide member 45 is shown in FIG.
As shown in (a) and (c), the electric wire D when the electric wire D having the largest diameter is held among the electric wires D held by the electric wire holding portion 43.
The center axis J1 passing through the center of the protective tube guide member 45 is formed on the same plane as the center axis J2 in the width direction of the protection tube guide member 45. Further, as shown in FIGS. 4A and 4B, when the wire D having the smallest diameter is held between the wires D held by the wire holding portion 43, the central axis J3 passing through the center of the wire D is formed as a protective tube. Below the center axis J2 in the width direction of the guide member 45 (FIG. 4)
(The lower part in (a)), the protection pipe guide member 4
5 are provided. For this reason, when attaching and detaching the protective tube 25 attached to the electric wire D, the electric wire D having the maximum diameter can be inserted without being caught by the protective tube guide member 45 unless the inclined surface formed at the distal end of the protective tube 25 is appropriate. However, there is a possibility that the wire D having the minimum diameter may be caught by the protection pipe guide member 45 and the work of attaching and detaching the wire D may be interrupted.

Therefore, the protection tube guide member 45 is smoothly connected to the distal end of the protection tube guide member 45 even with the wire D having the minimum diameter.
The guide inclined surface 65 is formed so that the guide inclined surface 65 can be inserted into the guide. That is, a guide inclined surface 65 is formed above the distal end of the protection tube guide member 45. The distal end of the guide inclined surface 65 is disposed at a position A below the upper end position of the wire D when the wire D having the minimum diameter is held among the wires D held by the wire holding portion 43. For this reason, when the protection pipe 25 is attached to the electric wire D having the smallest diameter, when the protection pipe 25 is moved to the protection pipe guide member 45 in order to detach the protection pipe 25 from the electric wire D, the protection pipe 25 Since the distal end portion is in contact with the guide inclined surface 65 and can move upward along the guide inclined surface 65, the protection tube 25 is not caught by the protection tube guide member 45.

Further, an inclined surface (hereinafter referred to as "a downward inclined surface 67") which is inclined downward from the front end to the rear end is provided at a lower portion of the distal end portion of the protection tube guide member 45. I have. The lower inclined surface 67 is provided so that the lower end of the protective tube 25 can be easily inserted into the lower end of the protective tube guide member 45 when the protective tube 25 attached to the electric wire D is detached.

As shown in FIG. 3A, a pressing member 69 for bringing the wire D into close contact with the tip of the protective tube guide member 45 is provided in the wire holding portion 43. FIG. 5 shows the pressing member 69, and FIG.
(A) is a cross-sectional view of a portion corresponding to the view taken along the line IV-IV, and (b) is a plan view of a portion corresponding to the view taken along the arrow V of (a). As shown in FIGS. 5A and 5B, the pressing member 69 has a pair of swingable rotating parts 71.
The rotating part 71 has a plate shape, and a pair of rotating parts 71 are arranged to face each other. The bases of the pair of rotating parts 71 are supported by the upper ends of the upper fixed plate 55 and the lower fixed plate 57. A concave portion 73 and a convex portion 75 are formed at the distal end of the rotating portion 71, and when the distal ends of the pair of rotating portions 71 come into contact with each other, the convex portion 75 of one rotating portion 71 is turned into the other rotating portion 71. And the convex portion 75 of the other rotating portion 71 engages with the concave portion 73 of the one rotating portion 71. For this reason, since one rotation part 71 moves the other rotation part 71, a pair of rotation parts 71 operate equally. For this reason, since the electric wire D pinched between the upper holding part 51 and the lower holding part 53 by the pressing member 69 is pressed against the protective tube guide member 45 side,
The electric wire D can be brought into close contact with the tip of the protection pipe guide member 45. In addition, as shown in FIG. 3A, an upper fixed plate 55 and a lower fixed plate 57 are provided at the bottom of the pair of rotating portions 71, and the tip of the rotating portion 71 is always connected to the connecting plate 4.
A torsion coil spring 77 that urges to swing toward the side 7 can be provided. Thus, when the upper grip 51 and the lower grip 53 are moved in a direction approaching each other, the pair of the rotating parts 71 are pivoted with the tip of the rotating part 71 swinging toward the connecting plate 47 side. Can be brought into contact with each other.

Next, the operation of the protective tube mounting / dismounting guide 41 of the present invention will be described. First, a case where the protective tube 25 is attached to the electric wire D will be described. After moving the aerial work vehicle 1 shown in FIG. 1 to a position near the work site, the outrigger jack 5 is extended to stably support the vehicle body 3. Then, the worker M rides on the work table 11 to operate the telescopic boom 9 to operate the work table 11.
To the desired height. Then, the worker M prepares the protective tube mounting device 29. That is, the protective tube mounting / dismounting guide 41 is attached to the electric wire D which is laid between the electric poles near the work site. The protection tube mounting / dismounting guide 41 is attached to the electric wire D by the hot stick 27 or the hand of the worker M.
The lower portion of the male screw 61 shown in FIG. 3 is gripped by the hot stick 27 or the hand of the worker M and then rotated to move the upper grip portion 51 and the lower grip portion 53 in directions away from each other and connected to the upper grip portion 51. A large gap is formed between the plates 47, and the electric wire D is inserted between the upper grip 51 and the lower grip 53 through this gap. Then, the worker M again rotates the lower portion of the male screw 61 by the hot stick 27 or the hand, and moves the upper grip portion 51 and the lower grip portion 53 in a direction approaching each other to clamp the electric wire D.

At the same time, the pressing member 6 shown in FIG.
9 engages with the convex portion 75 and the concave portion 73 of the other rotating portion 71 where the concave portion 73 and the convex portion 75 of the other rotating portion 71 are opposed to each other. Are evenly rotated so as to push up the tip of the to the connecting plate 47 side. For this reason, the electric wire D sandwiched between the upper grip portion 51 and the lower grip portion 53 is evenly pushed up to the connecting plate 47 side, and is clamped by the upper grip portion 51 and the lower grip portion 53. It is pinched while being pressed.

When the protection tube mounting / dismounting guide 41 is attached to the electric wire D, the worker M uses the hot stick 27 to remove the protection tube 25 stored in the storage box 23 as shown in FIG. The protective tube flange 25a is taken out from the feeding mechanism 31.
In between the pair of rollers of the front-side feeding mechanism 31a. The protection tube 25 inserted into the feeding mechanism 31 is sent out to the guide member 33 shown in FIG. 2 by the rotation of the roller, and moves to the protection tube mounting / dismounting guide 41 side with the protection tube 25 mounted outside the guide member 33. I do. Guide flange 3 of guide member 33
The distal end of 3b is connected to the connecting plate 47, and since the thickness of the guide flange 33b and the connecting plate 47 is substantially the same, the protective tube 25 moving from the guide member 33 is moved from the guide flange 33b to the connecting plate 47. And the main body 25 of the protection tube 25
b slides on the outer periphery of the protection tube guide member 45, and the protection tube 2
5 gradually approaches the wire D side. Then, the protection tube flange 25a is further expanded by the convex portion 35 protruding from the connecting plate 47 and the outer periphery of the electric wire holding portion 43, and positioned at the outer periphery of the electric wire D.
Here, even if there is a gap 37 between the upper grip portion 51 and the lower grip portion 53 of the electric wire holding portion 43 shown in FIG. 4C, since the convex portion 35 stands upright, the protective tube flange is provided. The portion 25a does not enter the gap 37. Therefore, the work of mounting the protection tube 25 is not interrupted.

When the protective tube 25 is further extended by the extending mechanism 31 shown in FIG. 1, the electric wire D shown in FIG. 2 moves into the internal space of the main body 25b of the protective tube 25, and a pair of protective tube flanges 25a is formed. Adhere to each other, and the protection tube 25
To protect the electric wire D.

Next, the operation in the case where the protective tube 25 attached to the electric wire D is detached from the electric wire D will be described. In order to detach the protective tube 25 attached to the electric wire D shown in FIG. 2 from the electric wire D, the worker M who is on the worktable 11 shown in FIG. The pipe 25 is gripped and moved to the protection pipe mounting / dismounting guide 41 side.
At this time, when the diameter of the electric wire D is large, FIG.
As shown in (c), the center axis J1 of the electric wire D and the center line J2 in the width direction of the protection pipe guide member 45 are on the same plane,
Since the position of the upper end of the electric wire D is located on the guide inclined surface 65, the tip of the protective tube 25 sliding on the electric wire D comes into contact with the guide inclined surface 65, Move along the base side of the protection tube guide member 45 along the inner surface.

As shown in FIG. 4B, when the diameter of the electric wire D is small, the surface passing through the upper end of the electric wire D held by the electric wire holding portion 43 is a guide inclined surface of the protective tube guide member 45. 65, the protection pipe 25 attached to the electric wire D is moved in the direction of the protection pipe mounting / dismounting guide 41.
After the distal end portion of the protection tube 25 abuts on the guide inclined surface 65, it moves to the base side of the protection tube guide member 45 along the guide inclined surface 65. The electric wire D is pressed by the pressing member 69 shown in FIG.
Since it is pressed so as to be in close contact with
No gap is formed between the electric wire D and the distal end of the protection pipe guide member 45 shown in FIG.

Further, since the leading end of the electric wire holding portion 43 has an inclined surface 63 which is inclined toward the fixing plate 49 as it goes to the rear end side of the electric wire holding portion 43, it is shown in FIG. The gap 37 between the upper grip 51 and the lower grip 53
Even when the protection pipe 25 is attached and detached, the protection pipe flange 25a of the protection pipe 25 is expanded by the peripheral edge of the inclined surface 63 when the protection pipe 25 is detached, so that the protection pipe flange 25a does not enter the gap 37. . Therefore, the distal end of the protective tube 25 does not get caught on the distal end of the protective tube guide member 45 and does not enter the gap 37 between the upper grip portion 51 and the lower grip portion 53, and the work of attaching and detaching the protective tube 25 is interrupted. Without doing so, the protection tube 25 can be easily detached from the electric wire D.

When the worker M shown in FIG. 1 further pulls the protective tube 25 attached to the electric wire D shown in FIG.
b moves to the rear end side of the protection pipe guide member 45 and the protection pipe 2
5, the protective tube flange 25a is opened outward by the electric wire holding portion 43, the protective tube 25 moves in a direction away from the electric wire D, and the protective tube 25 is detached from the electric wire D.

[0035]

According to the protective tube mounting and dismounting guide according to the present invention, an electric wire having an inclined surface which clamps the electric wire and which is gradually inclined at one end in a direction gradually moving away from the electric wire toward the other end. A clamping means, connected to the wire clamping means, protruding forward from one end of the wire clamping means and having a leading end close to the peripheral wall of the wire gripped by the wire clamping means and proceeding to the other end of the wire clamping means. When the protective tube attached to the electric wire is moved toward the protective tube mounting / dismounting guide and detached from the electric wire, the tip of the protective tube is inclined Since the wire moves in the direction away from the electric wire while being expanded by the peripheral edge of the surface, the electric wire does not enter the gap formed in the electric wire holding means. For this reason, the work of attaching and detaching the protection tube can be performed continuously, and the work efficiency can be improved.

The electric wire clamping means has a pair of gripping members movable in directions approaching and separating from each other, and a connecting member connected to the protective tube guide member is connected to one of the pair of gripping members. When the member has a convex portion on one gripping member side end and the side opposite to the other gripping member, when the wire gripping means is incompletely gripped by the wire or when the wire has a protrusion or the like If a gap is formed between the electric wire clamping means and the protection tube is inserted along the protection tube guide member, the tip of the protection tube attempts to enter the gap, but a convex portion is provided near the gap. This prevents the tip of the protection tube from entering the gap, so that the protection tube can be easily attached to the electric wire.

Further, when a pressing member is provided for pressing the wire against one of the pair of holding members when the wire is held between the pair of holding members of the wire holding means, the wire holding means holds the pair of wires. Since the wire can be pressed uniformly to any one of the members, the wire can be brought into close contact with the tip of the protective tube guide member. Since it can be gripped in a closed state, there is no need to prepare a protective tube mounting / dismounting guide of the same type as the diameter of the electric wire, which is economical.

The pressing member has a pair of rotatable rotating portions, one of which is provided on one of the pair of holding members, and the other of which is provided on the other of the pair of holding members. A pair of rotating parts are provided so as to face each other, and a concave part and a convex part are provided at the tip part of the rotating part. When the tip parts of the pair of rotating parts come into contact with each other, one of the rotating parts When the convex portion engages with the concave portion of the other rotating portion and the convex portion of the other rotating portion engages with the concave portion of one rotating portion, the electric wire is inserted through the pair of gripping members,
When the pair of gripping members are moved in a direction approaching each other,
The concave portion and convex portion at the tip of one rotating portion engage with the convex portion and concave portion at the tip of the other rotating portion, one convex portion presses the other concave portion, and the other convex portion is pressed against the other concave portion. , So that the pair of rotating parts cooperate evenly to press the wire uniformly. For this reason, an electric wire can be pinched reliably without a gap.

Further, the distal end of the protective tube guide member has an inclined surface which gradually inclines upwardly toward the base end side of the protective tube guide member, and the distal end of the inclined surface is pinched by electric wire clamping means. When placing on the surface below the upper end of the wire when the smallest diameter wire is sandwiched among the wires to be removed, when attaching and detaching the protective tube attached to the wire while holding the smallest diameter wire When the protective tube is moved in the direction of the protective tube guide member, the distal end of the protective tube always contacts the inclined surface, so that the protective tube can move along the inclined surface and detach the protective tube from the electric wire. . Further, in the prior art in which the central axis of the electric wire and the central axis in the width direction of the protective tube guide member were on the same plane, it was necessary to provide a protective tube mounting and dismounting guide of the same type as the diameter of the electric wire. In comparison, it is extremely economical because it is possible to cope with the diameters of a plurality of electric wires with only one protective tube mounting and dismounting guide.

[Brief description of the drawings]

FIG. 1 is a perspective view of an aerial work vehicle equipped with a protective tube mounting / dismounting guide according to an embodiment of the present invention.

FIG. 2 is a perspective view for explaining an operation when a protection tube is mounted by a protection tube mounting / dismounting guide according to one embodiment of the present invention.

3A and 3B show a protection pipe mounting / dismounting guide according to an embodiment of the present invention, wherein FIG. 3A is a bottom view of the protection pipe mounting / dismounting guide, and FIG. FIG.
FIG. 3C shows a protection tube guide member corresponding to a portion viewed in the direction of the arrow III in FIG.

FIG. 4 is a diagram for explaining the relationship between the shape of the distal end portion of the protective tube mounting / removing guide and the diameter of the electric wire according to the embodiment of the present invention.

FIG. 5 is a diagram showing a pressing member of the protective tube mounting / dismounting guide according to the embodiment of the present invention.

FIG. 6 is a perspective view of a case where a protection tube is mounted using a conventional protection tube mounting / removing guide.

FIG. 7 is a perspective view of a conventional protection tube mounting and dismounting guide.

FIG. 8 is a view showing a relationship between a conventional protection pipe mounting / dismounting guide and an electric wire.

FIG. 9 is a view for explaining a problem of a conventional protection pipe mounting / dismounting guide.

[Explanation of symbols]

 25 Protective tube 25a Protective tube flange (flange) 25b Protective tube main body (main body) 25c Opening 35,75 convex portion 41 Protective tube mounting / dismounting guide 43 Electric wire clamping portion (electric wire clamping means) 45 Protective tube guide member 47 Connecting plate (connecting member) 51 Upper holding portion (holding member) 53 Lower holding portion (holding member) 63 Inclined surface 65 Guide inclined surface (inclined surface) 69 Pressing member 71 Rotating portion 73 Depression D Electric wire

Claims (5)

[Claims] An opening which opens from one end to the other end of a side wall of a cylindrical main body, and a pair of projections projecting radially outward from both ends of the opening and opposed to each other. Opening the flange portion of the protective tube having a flange portion, inserting the electric wire into the main body portion, and attaching the protective tube to the electric wire,
Also, a protective tube mounting / dismounting guide for opening the flange portion of the protective tube attached to the electric wire and detaching the protective tube from the electric wire, the electric tube holding and holding the electric wire, and one end portion having the other end. A wire clamping means having an inclined surface that is gradually inclined in a direction away from the electric wire as proceeding to the part side; and a tip end projecting forward from one end of the wire clamping means connected to the wire clamping means and projecting forward. A protection pipe guide member which is close to a peripheral wall of the electric wire gripped by the electric wire holding means and is separated from the electric wire holding means as it advances toward the other end of the electric wire holding means. Guide out. 2. The electric wire clamping means includes a pair of gripping members movable in directions approaching and separating from each other, and a connecting member connected to the protective tube guide member is connected to one of the pair of gripping members. 2. The protective tube mounting / dismounting guide according to claim 1, wherein the connecting member has a convex portion on an end portion on one gripping member side and on a side facing the other gripping member. 3. A pressing member for pressing said electric wire against one of said pair of gripping members when said electric wire is held between said pair of gripping members of said electric wire holding means. Guide for removing and installing protective pipes as described. 4. The pressing member has a pair of rotatable rotating parts, one of the rotating parts is provided on one of the pair of gripping members, and the other of the rotating parts is a pair of the gripping members. The pair of rotating parts are provided on the other side of the gripping member, and the pair of rotating parts are arranged to face each other. The concave part and the convex part are provided at the tip of the rotating part, and the tip parts of the pair of rotating parts contact each other. When in contact, the convex portion of one of the rotating portions engages with the concave portion of the other rotating portion, and the convex portion of the other rotating portion engages with the concave portion of the one rotating portion. The protective tube installation / removal guide according to claim 3, wherein the guide is provided. 5. A tip end of the protection pipe guide member has an inclined surface which is gradually inclined upwardly toward a base end side of the protection pipe guide member, and a tip end of the slope face is the electric wire. The protective device according to any one of claims 1 to 4, wherein the electric wire is arranged on a surface below an upper end of the electric wire when the electric wire having the smallest diameter is held among the electric wires held by the holding means. Pipe loading guide.