JP3198237B2 - Protection tube insertion guide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection tube insertion guide used to insert a protection tube for protecting an electric wire by covering the outer periphery of an electric wire arranged overhead.

[0002]

2. Description of the Related Art When performing construction work or the like in the vicinity of an imaginary electric wire, an outer periphery of the electric wire near a work site is used to prevent work equipment from directly touching the electric wire during the work. Is covered with a protective tube (a so-called “poly tube”) formed of an insulating material.

[0003] As shown in FIG. 9 to FIG.
It is composed of a main body 51 and a connecting part 52. The main body 51 is formed in an annular cylindrical shape in cross section, and a pair of main body side flanges 54a and 54b are formed from both ends of an opening 51b formed in one place of the cylindrical part 51. Then, the main body side flanges 54a and 54b are opened to open the cylindrical part 51.
By inserting the electric wire into the internal space 51a, the outer periphery of the electric wire is covered and protected.

As shown in FIG. 4, the protective tube 50 is mounted on an electric wire by using an aerial work vehicle 10 in which a work table 17 is provided at the tip of a boom 13 provided on a vehicle body 11. This is performed using a protective tube mounting device provided at 17. Here, the protection pipe mounting device means that the protection pipe insertion mechanism 20 that feeds out the protection pipe 50 toward the electric wire D and the electric wire D are connected by the protection pipe insertion guide 30, and the protection pipe 50 that is drawn out by the protection pipe insertion mechanism 20. Is guided from the protective tube insertion guide 30 to the outer periphery of the electric wire D and mounted.

[0005] A wire mounting member is provided at an end of the protective tube insertion guide 30 on the wire side. As shown in detail in FIG. 6, the wire mounting member includes a holding member body 38 formed in a long hollow pipe shape for holding the wire D from above and below at an inner periphery thereof, and a holding member body 38. An insertion guide connecting portion 36 extending obliquely from
It is composed of an electric-wire-attaching-portion-side flat plate portion 37 that connects the holding member main body 38 and the insertion guide connecting portion 36.

[0006] The holding member body 38 is formed of an upper holding member 38a and a lower holding member 38b which are vertically divided into two parts so that the cross-sectional shape is substantially semicircular, and the respective holding members 38a, 38b are provided. The upper fixing plate 39
a and the lower fixing plate 39b are fixed. Then, the fixing bolt 39c is screwed in a state where the electric wire D is positioned in the hollow space of the electric wire holding portion 38, thereby tightening the holding members 38a and 38b via the fixing plates 39a and 39b. Pinch.

[0007]

Here, there are various types of wires D which are imaginarily disposed, and the outer diameter (thickness) of the wires D differs depending on the type. For this reason, in the protective tube insertion guide configured as described above, in order to securely hold the electric wire D, an electric wire mounting member having an electric wire holding portion 38 having an inner diameter that differs according to the outer diameter of the electric wire D is prepared. Must.

For example, when the outer diameter of the electric wire D is smaller than the inner diameter of the holding member body 38, even if the fixing bolt 39c is screwed in and the two holding members 38a, 38b are tightened,
The wire attachment member cannot be firmly attached to the wire D, and the wire attachment member moves or rotates with respect to the wire D, so that the protection tube 50 cannot be smoothly attached. Conversely, if the outer diameter of the wire D is larger than the inner diameter of the holding member body 38, the wire D may be damaged,
If the wire is further thick, the wire D cannot be clamped and the wire mounting member cannot be mounted on the wire D, so that even in this case, the protection tube 50 cannot be mounted.

For this reason, it is necessary to prepare a plurality of types of wire mounting members having a holding member main body formed with an inner diameter corresponding to the outer diameter of each wire D, and to change the wire mounting portion in accordance with a change in the diameter of the wire D. Therefore, there is a problem that the production cost of the protection tube insertion guide is increased, and there is also a problem that the work efficiency of mounting the protection tube is reduced.

The present invention has been made in view of such a problem, and is intended to simply and securely attach an electric wire mounting member to an electric wire even when the outer diameter of the electric wire on which the protective tube is mounted is different. It is an object of the present invention to provide a protective tube insertion guide for a protective tube mounting device.

[0011]

In order to achieve the above object, in a protective tube insertion guide according to the present invention, an electric wire holding member attached to an electric wire by holding the electric wire includes a holding member main body, a holding member and , And spacers. The holding member main body is configured to be splittable and engageable with an upper holding member and a lower holding member, and is formed to have a hollow pipe shape in the engaged state. The spacer is detachably configured on at least one of the upper holding member and the lower holding member in the divided state, and has a concave portion corresponding to the outer diameter of the electric wire for receiving and holding the electric wire,
The concave portion receives and holds the electric wire and is located in the hollow pipe-shaped inner peripheral space. The holding member holds the electric wire by engaging and holding the upper holding member and the lower holding member.

[0012]

According to the protective tube insertion guide constructed as described above, if the outer diameter of the wire to be clamped is larger than the inner diameter of the clamping member main body, it corresponds to the outer diameter of the wire to be clamped. By mounting a spacer having a concave portion having a size as large as the upper or lower holding member, the holding inner diameter of the holding member body can be reduced, and the wire holding member can be firmly held by the wire.

When there are many types of outer diameter of the electric wire,
A plurality of spacers having different shapes of concave portions corresponding to the outer diameter of the electric wire may be prepared, and may be appropriately replaced according to the outer diameter. Further, when the inner diameter of the holding member body and the outer diameter of the wire to be held substantially coincide with each other, the locking by the locking member is released, the spacer is removed from the holding member body, and the wire is directly held by the holding member body. Just do it. Accordingly, even when the outer diameter of the wire on which the protective tube is mounted is different, the wire holding member can be easily held by the wire without replacing the holding member body.

It is desirable that the spacer is composed of an upper spacer member and a lower spacer member, and that the upper spacer member and the lower spacer member are detachably attached to the upper clamping member and the lower clamping member, respectively. With such a configuration, the outer periphery of the wire to be held can be held with a substantially uniform force at the center of the wire holding portion, and the holding force can be increased.

[0015]

Preferred embodiments of the present invention will be described below with reference to the drawings. First, an aerial work vehicle to which a protective tube mounting device provided with a protective tube insertion guide according to the present invention will be described with reference to FIGS. The aerial work vehicle 10 is provided with a boom swivel table 12 which can be swiveled on a vehicle body 11, and a boom 13 which is configured to be extendable and retractable is attached to the boom swivel table 12. It is free. At the tip of the boom 13 is attached a vertical post 16 that can always maintain vertical by a leveling mechanism.
A work table 17 is attached to the vertical post 16 so that the work table 17 can be horizontally turned by a turning mechanism.

An arm mechanism 40 is provided above the vertical post 16 in the aerial work vehicle 10 configured as described above, and the arm mechanism 40 includes a protective tube insertion mechanism 20.
Is attached. The protection tube insertion mechanism 20 includes a front-side feeding mechanism 20a and a rear-side feeding mechanism 20b, and each of the feeding mechanisms 20a and 20b has a pair of rollers disposed to face each other. The rollers are pinched by the rollers 54 and 56 of the protection tube 50, and the protection tube 50 is extended by rotating these rollers.

Here, the protection tube insertion mechanism 20 and the electric wire D are connected by a protection tube insertion guide 30. The protection tube insertion guide 30 includes a wire attachment portion attached to the electric wire D and a protection tube insertion guide member connected to the protection tube insertion mechanism 20.

As shown in FIGS. 1 to 3 and 6, the electric wire mounting portion includes a holding member main body 38 formed in a long shape for holding the electric wire D from above and below, and a holding member main body 38. An insertion guide connecting portion 36 extending and attached diagonally to the side; a holding member main body 38 and the insertion guide connecting portion 36;
And a flat plate portion 37 on the wire mounting portion side that connects the two.

The holding member main body 38 is formed of an upper holding member 38a and a lower holding member 38b which can be divided and engaged in the vertical direction, and each of which has a substantially semicircular cross section. A wire mounting portion side flat plate portion 37 extending in the horizontal direction is fixed to a left side (a front side in FIG. 6) of the lower holding member 38b. A lower fixing plate 39b extending in the horizontal direction is fixed to the right side of the lower holding member 38b (the side opposite to the side to which the flat plate portion 37 is fixed). A bearing pipe 39e is fixed to an end of the lower fixing plate 39b opposite to the lower holding member 38b side, and a pivot shaft 39d, which will be described in detail later, is inserted therein.

The upper wire holding portion 38a is not provided with a member corresponding to the flat plate portion 37 on the wire mounting portion side, and the upper wire holding portion 38a and the lower wire holding portion 38b are joined to form a hollow pipe. Thus, only the upper fixing plate 39a positioned above the lower fixing plate 39b is fixed in the same shape as the lower fixing plate 39b. The upper and lower fixing plates 39a and 39b and the fixing bolts 3
9c and the like constitute the holding member described in the claims.

The upper wire holding portion 3 of the upper fixing plate 39a
Flanges 39f, 39f are fixed to the side surface on the side opposite to the 8a side, and the pivot shaft 39 is attached to the flanges 39f, 39f.
1 is formed by inserting the pivot shaft 39d into the bearing hole of the flange 39f and the through hole of the bearing pipe 39e.
As shown by, it is held rotatably about the pivot shaft 39d.

Here, above the lower fixing plate 39b and the lower holding member 38b (hereinafter referred to as "lower wire holding portion"), the upper fixing plate 39a and the upper holding member 38a (hereinafter referred to as "upper wire holding portion"). In the state where the upper wire holding portions are rotated so that the upper wire holding portion is positioned so that the upper wire holding portion is positioned, a predetermined amount of gap S is generated between the upper wire holding portion and the lower wire holding portion. It has become. Here, the upper holding member 38a and the lower holding member 38b
Is formed such that the inner diameter (the inner diameter of the holding member main body 38) having the predetermined interval S is a perfect circle (so that the depth of the concave portion is smaller than the radius).

When the outer diameter of the electric wire D is substantially equal to the inner diameter of the holding member body 38, the electric wire D is held between the upper holding member 38a and the lower holding member 38b, and fixing bolts are provided from above the upper fixing plate 39a. By inserting 39c and screwing it into a fixing nut 39g fixed to the lower fixing plate 39b, the upper wire holding portion and the lower wire holding portion are moved in a direction approaching and fixed. As a result, the wire D is held before the lower end surface of the upper wire holding portion and the upper end surface of the lower wire holding portion come into contact with each other, so that the upper holding member 38a is tightened by tightening the fixing bolt 39c. The electric wire D can be firmly held by the lower holding member 38b.

The flat plate portion 37 on the wire mounting portion side is formed in a substantially triangular shape, and an insertion guide connecting member is fixed to a side substantially opposite to the side to which the holding member body 38 is fixed. The insertion guide connecting member is formed in a so-called arrow feather shape in which a contact portion side (front side) with the wire holding portion 38 is thin and a cutout is formed on the opposite side (rear side). The guide plate 36 is fixed substantially at right angles to the guide plate 36, and the wire mounting portion side connection portion 35 has a tip portion formed in a conical shape so as to engage with a notch on the rear side of the guide plate 36. .

The protective tube insertion guide member is attached to the electric wire mounting portion configured as described above and attached to the electric wire D. The protection tube insertion guide member includes a guide member side connection portion 31 connected to the electric wire attachment portion side connection portion 35, and a guide member 33 attached to the guide member side connection portion 31.

The guide member 33 has a main body portion 33a formed in a long cylindrical shape, and the main body portion 33a is similarly formed with a guide member flange portion 33b extending in a long shape. The diameter of the main body portion 33a is formed so as to be insertable into the internal space 51a of the protective tube 50, and the guide member flange portion 33b opens the main body side flange portions 54a, 54b to provide a gap between the two flange portions 54a, 54b. With the protection tube 5
0 is formed with a slidable thickness and length. Then, the flat plate portion 37 on the wire mounting portion side is also replaced with the guide member flange portion 33.
It is formed with the same thickness as b. On the guide member side connection portion 31 side of the guide member flange 33b, a connection protrusion 34 formed in a flat plate shape is formed.

The protective tube insertion guide thus constructed is connected to the wire mounting portion, and the guide member flange 33b and the wire mounting portion side flat plate portion 37 are on the same plane near the wire mounting portion side connecting portion 35. To position. In the protective tube insertion guide, since the side opposite to the side connected to the wire attachment portion is connected to the protective tube insertion mechanism 20, the protective tube 50 extended from the protective tube insertion mechanism 20 is connected to the main body side flange. Part 5
4, the guide member 33 is moved in the direction of the electric wire D while holding the guide member flange portion 33b and sliding on the outer periphery of the guide member 33.

Since the guide member flange 33b is connected to the flat plate portion 37 on the wire mounting portion side, the main body flange portion 54 also slides from the guide member flange 33b to the flat plate portion 37 on the wire mounting portion to pinch the wire. The electric wire D is further expanded around the outer periphery of the portion 38.
Located on the outer periphery of After that, when the wire D is further fed out by the feeding mechanism 20, the electric wire D becomes the internal space 51a
And the main body side brim portion 54 is also in close contact, so that the protective tube 50 can protect the electric wire D firmly.

When protecting the electric wire over a wide range, the protective tube 50 is continuously fed out, and a fitting projection 53 'of another protective tube is inserted into a fitting groove 55 formed in the connecting portion 52.
Is inserted to connect the protection tubes 50 and 50 '. For this reason, the main body side flange 54a,
The connection side flanges 56a and 56b are formed to cover 54b.

Next, a case where the electric wire D whose outer diameter is smaller than the inner diameter of the electric wire holding portion 38 using the protective tube insertion guide configured as described above will be described. In this case, spacers 70, 70 are attached to the inner peripheral surfaces of the upper holding member 38a and the lower holding member 38b.

The spacer 70 includes a spacer body 71 having a semicircular cross section for receiving and holding the electric wire D, and a clip member (locking member) integrally connected to the spacer body 71. 72. In this embodiment, the spacers 70, 70
Is mounted on both the upper holding member 38a and the lower holding member 38b.
The spacer 70 attached to the lower holding member 38b will be described below because the spacer 70 attached to the a and 38b has the same configuration.

The spacer body 71 is formed of a resin such as nylon resin (NC nylon), and has an intermediate portion 71b whose outer peripheral surface is in contact with the inner peripheral surface (recess) of the lower holding member 38b. End protrusions 71c, 71c are formed extending from both ends of the intermediate portion 71b in the front-rear direction so as to increase the outer diameter of one step, and are held inside the intermediate portion 71b and the end protrusions 71c, 71c. A concave portion 71a extending in the front-rear direction is formed in the same arc as the outer diameter of the electric wire D (a concave portion corresponding to the outer diameter of the electric wire D). Both end portions of the end projections 71c, 71c are formed in a tapered shape toward the electric wire D so as not to be caught when the protection tube 50 is inserted and removed.

An upper plate 72a of a clip member 72 extending horizontally to the right is fixed from the upper end surface of the opening near the center in the front-rear direction of the intermediate portion 71b.
Locking portions 72b, 72b extending downward are formed at front and rear ends of the upper plate 72a. Both locking portions 72b, 7
2b is the width W of the parallel portion 39s of the lower fixing plate 39b.
And has the same width W.

Since the clip member 72 is formed of a thin iron plate, the locking portions 72c, 72c are swingable in the front-rear direction, and the lower portion is wider than the width of the parallel portion 39s. Further, projections 72c, 72c are formed on the inner surfaces of the locking portions 72b, 72b.
The locking projections 72c, 72c are formed such that the distance from the lower surface of the upper plate 72a to the upper end thereof is the same as the thickness t of the lower fixing plate 39b.

Thus, as shown in FIG. 1, the clip member 72 is positioned above the lower fixing plate 39b, and is pushed down so that the intermediate portion 71b comes into contact with the inner peripheral surface of the lower holding member 38b. Then, the locking portions 72b, 72b are pushed back and forth by the size of the locking projections 72c, 72c, and the clip member 72 is locked to the lower fixing plate 39b.

Then, as described above, the spacer 70 is also engaged with the upper wire holding portion, and the upper wire holding portion is rotated to position the wire D between the concave portions 71a, 71a, and the fixing bolt 39c is screwed. Then, the fixing plates 39a and 39b are tightened to firmly hold the electric wire D having an outer diameter smaller than the inner diameter of the holding member body 38 by the spacers 70 and 70, and the electric wire mounting portion is connected to the electric wire. D can be attached.

When the wire mounting portion is mounted on the wire D as described above, the end protrusions 71c, 71c are located before and after the holding members 38a, 38b, and the fixing plates 39a, 39b are clip members. Since the wire 70 is sandwiched between the spacers 72, the spacer 70 does not come off the holding member main body 38 even when a force for moving the wire mounting portion in the front-rear direction is applied.

In the above embodiment, the spacer body 71 is formed of nylon for ease of processing.
Although the clip member 72 is made of a thin iron plate, the present invention is not limited to this. Both members may be made of nylon or iron, or may be made of another resin material such as rubber or plastic. Using
Another metal material such as aluminum may be used.

When there are a plurality of types of electric wires D whose outer diameter is smaller than the inner diameter of the holding member main body 38, a plurality of spacers 70 having different concave arcs 71a may be provided. I'm sorry. However, the spacer 70
In order to prevent the number of wires from becoming extremely large and the processing from becoming difficult, three types of wire attachment parts having a large, medium and small inside diameter of the holding member body 38 are prepared, and a spacer 70 that fits this inside diameter is prepared. It is desirable in actual work to form several types of.

Further, in the above embodiment, the clip member 72 is not positioned on the inclined portions 39n of the fixing plates 39a and 39b with which the main body side flanges 54a and 54b come into contact when the protective tube 50 is inserted and removed. At the same time, in order to make the shape of the spacer 70 attached to the upper and lower electric wire attachment portions the same, the clip member 72 is locked to the parallel portion 39s, but in places other than the parallel portion 39s including the inclined portion 39n. The clip member 72 may be locked.

The locking member for locking the spacer 70 to the holding member body 38 is not limited to the above-described clip member 72, but a so-called magic tape is used for the spacer body 71 and the holding member body 38. It is a matter of course that a locking member having another configuration such as locking by attaching or screwing may be used. Further, it is not necessary to particularly provide a locking member, and the spacer 70 may be simply placed on the inner peripheral surface of the holding member main body 38.

In the above embodiment, the spacers 70, 70 are formed in a semicircular shape and attached to the upper holding portion and the lower holding portion, respectively. However, the present invention is not limited to this. It may be configured as shown in FIG. The spacer 80 includes a spacer body 81 and a clip member 82 in the same manner as the spacer 70. The spacer body 81 has a substantially crescent cross section and a U-shape. The concave portion 81a has a shape corresponding to the outer diameter of the electric wire D.

The spacer 80 thus configured is attached to the lower wire holding portion or the upper wire holding portion in the same manner as the spacer 70 described above. In FIG. 7,
This shows a state in which the spacer 80 is attached to the lower wire holding portion. When the electric wire D is placed in the concave portion 81a and the lower electric wire holding portion and the upper electric wire holding portion are joined, the lower half of the electric wire D abuts on the arc-shaped portion of the concave portion 81a, and the upper side of the electric wire D The portion contacts a part of the inner surface of the upper holding member 38a. Then, by tightening the fixing bolt 39c, the electric wire D can be firmly held.

In each of the above embodiments, the entire outer peripheral surfaces of the intermediate portions 71b and 81b of the spacer main bodies 71 and 81 abut against the inner peripheral surface of the holding member main body 38, and the entire inner peripheral surfaces of the concave portions 71a and 81a correspond to the electric wires. Although it is configured to contact the outer peripheral surface of D, the present invention is not limited to this. For example, as shown in FIG. 8, a plurality of protrusions 91b and 91c extending in the longitudinal direction are formed in the concave portion and the outer periphery of the spacer main body 91 in the spacer 90. The protrusion 91b supports the electric wire D, and the protrusion 91c holds the holding member. Body 38
May be supported on the inner peripheral surface. Further, the protrusions 91b and 91c may extend in the circumferential direction and be formed in plural in the longitudinal direction, or may be independent plural hemispherical protrusions.

[0045]

As described above, the protective tube insertion guide according to the present invention has a concave portion corresponding to the outer diameter of the electric wire when the electric wire holding member is attached to an electric wire having an outer diameter smaller than the inner diameter of the holding member main body. The spacer thus formed is mounted on the holding member body. This eliminates the need to manufacture the same number of wire holding members according to the type of the outer diameter of the wire, and prepares in advance a wire holding member having several types (two or three types) of inner diameters of the holding member body, and prepares a wire holding member. After selecting a spacer according to the outer diameter and attaching the spacer to the wire holding member, the wire holding member can be firmly attached to the wire. For this reason, a protective tube insertion guide capable of accommodating a plurality of wire diameters can be obtained at a low cost, and even when the diameter of the wire to be clamped changes during the work, only the spacers need to be replaced. Work efficiency can be improved.

The spacer body may be composed of an upper spacer member and a lower spacer member, and the upper spacer member and the lower spacer member may be detachably attached to the upper clamping member and the lower clamping member, respectively. In the case of the configuration, in the center of the wire holding portion,
Since the outer periphery of the wire to be held can be held with a substantially uniform force, the amount of deformation of the wire can be suppressed, and the holding force can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wire attachment portion in a protective tube insertion guide according to the present invention.

FIG. 2 is a top view of a lower holding member in the electric wire attachment portion.

FIG. 3 is a view of the electric wire mounting portion viewed from an arrow direction III in FIG. 2;

FIG. 4 is a perspective view of an aerial work vehicle provided with the protective tube insertion guide.

FIG. 5 is a side view of a protection tube mounting device provided with the protection tube insertion guide.

FIG. 6 is a perspective view showing a state where the electric wire attachment portion is attached to an electric wire.

FIG. 7 is a front view showing a different embodiment of the present invention.

FIG. 8 is a front view showing a different embodiment of the present invention.

FIG. 9 is a front view and a side view of the protection tube.

FIG. 10 is a sectional view of the protective tube.

FIG. 11 is a sectional view of the protective tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Aerial work vehicle 20 Protective tube insertion mechanism 30 Protective tube insertion guide 38 Wire clamping portion 50 Protective tube 70, 80, 90 Spacer D Electric wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 7/00 H02G 1/02

Claims (2)

(57) [Claims] 1. A protection tube insertion guide provided in a protection tube mounting device for mounting a protection tube on an electric wire, wherein a protection tube insertion guide for guiding the protection tube to the outer periphery of the electric wire has one end connected to the protection tube. A protection tube insertion guide member connected to the feeding portion to be fed out; and a wire holding member connected to the other end of the protection tube insertion guide member by holding the wire connected to the other end of the protection tube insertion guide member. The wire holding member includes an upper holding member and a lower portion. A holding member main body formed in a hollow pipe shape in the engaged state, and a detachable and detachable structure attached to at least one of the upper holding member and the lower holding member in the split state; A spacer which is located in the hollow pipe-shaped inner peripheral space in a state in which an electric wire is received and held in the concave portion; and Protective tube insertion guide and said with product lower clamping member by engagement held, characterized in that it has a holding member for holding the electric wire. 2. The method according to claim 1, wherein the spacer includes an upper spacer member and a lower spacer member, and the upper spacer member and the lower spacer member are configured to be detachably attached to the upper holding member and the lower holding member, respectively. The protection tube insertion guide according to claim 1, wherein