JP2017192234A - Lead-in wire protective tube fixing device, structure to fix protective tube fixing device to lead-in wire, and method to fix protective tube fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lead-in wire protective tube fixing device which allows a lead-in wire protective tube as a tube with a generally cylindrical configuration to be fixed effectively to a lead-in wire without use of a vinyl tape or a binding wire.SOLUTION: A lead-in wire protective tube fixing device 1 which comprises a penetrating hollow portion for inserting a lead-in wire bundle 60 and fixes a lead-in wire protective tube 50 elastically openable and closable from a cut line 51 extending in generally axial direction to the outer surface of the lead-in wire bundle comprises: a pair of opening and closing members 12 and 20 openable and closable via a hinge; an insulation cover 10 comprising a coupling piece for coupling the pair of opening and closing members in a closed state; and an elastic fixation member 40 which can be installed to the outer surface of the lead-in wire bundle fixing the lead-in wire protective tube and whose axial length is shorter than that of the insulation cover.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a protective tube fixing device for a lead-in wire that can securely fix the protective tube for the lead-in wire to the lead-in wire, a structure for fixing the protective tube fixing device to the lead-in wire, and fixing the protective tube The present invention relates to an apparatus fixing method.

Protecting the lead-in line when trees or buildings are in contact with the lead-in line, or causing heavy equipment for construction work to contact the lead-in line that is in a charged state and disconnecting it or damaging the insulation coating In order to prevent this, a protective tube is installed with the outer surface of the lead-in wire covered. The protective tube is a tubular body made of an insulating material such as polyethylene, and is configured to be openable and closable by including a cut line extending in the axial direction.
Conventionally, there is no dedicated fixing means for fixing the installed protective pipe to the lead-in line by inserting the lead-in line into the lead-in line and closing it with the lead-in line open. A vinyl tape or a bind wire was wound around the wire to fix both.

However, the fixing with the vinyl tape has caused problems such as the vinyl tape being cut due to wind vibration and impact, and the protective tube being displaced due to a decrease in fixing force over time. If the protective tube is displaced, the lead-in wire coating may be damaged, causing damage to the customer's equipment due to abnormal voltage, or a power failure due to a short circuit or disconnection.
Further, in the case of fixing with the bind wire, there is a possibility that the bind wire damages the coating of the lead-in wire and causes device damage, short circuit, or disconnection.
Patent Document 1 discloses a wire protective tube locking tool for fixing an electric wire protective tube mounted to protect an overhead distribution line to the distribution line. However, the wire protection tube has a complicated structure with projections suitable for locking by this locking tool, and the structure is different from the protection tube of the lead-in wire, which is a simple cylindrical body. It cannot be applied to lead-in protective tubes.

Japanese Patent No. 3332881

  The present invention has been made in view of the above, and effectively secures a lead-in wire protective tube as a tubular body having a substantially cylindrical configuration to the lead-in wire without using vinyl tape or a bind wire. It is an object of the present invention to provide a protective tube fixing device for a lead-in wire that makes it possible.

In order to achieve the above object, a lead-in wire protective tube fixing device according to the invention of claim 1 includes a through hollow portion through which a lead-in wire bundle is inserted, and a lead-in wire that can be opened and closed elastically from a cut line extending substantially in the axial direction. A lead-in wire protective tube fixing device for fixing a protective tube to the outer surface of the lead-in wire bundle, comprising a pair of openable / closable members that can be opened and closed via a hinge portion, and a coupling piece that couples the pair of open / close members in a closed state. An insulating cover provided; and an elastic fixing member that can be attached to an outer surface of the lead-in wire bundle that fixes the lead-in wire protective tube and whose axial length is shorter than the axial length of the insulating cover. It is characterized by.
In the lead-in wire protective tube fixing device according to the second aspect of the present invention, a guide member extending in a direction intersecting the axial direction of the insulating cover is provided on the outer surface of each opening / closing member, and each guide member is provided at each tip. An inner edge of the lead-in wire protective tube is supported by an edge and the lead-in wire protective tube is allowed to move in the axial direction while maintaining the open state of the lead-in wire protective tube. .

According to a third aspect of the present invention, there is provided a structure for fixing the lead-in wire protective tube fixing device to the lead-in wire, wherein the elastic fixing member fixed to the outer surface of the lead-in wire bundle and the opening and closing members close to one end in the axial direction. And the lead-in wire protective tube disposed on the other axial end opening side in the insulating cover in a state where the elastic fixing member is held under pressure.
A method for fixing the protective tube fixing device according to the invention of claim 4 is a method for fixing the lead-in wire bundle installed in a non-horizontal posture, and the step of attaching the elastic fixing member to the outer surface of the lead-in wire bundle; Fixing the insulating cover to the lead-in wire bundle by closing the pair of opening and closing members so that the elastic fixing member is positioned closer to the lower end in the axial direction, and then connecting with the connecting piece; Inserting the protective tube into the axially upper opening.

  According to the present invention, a lead-in line protective tube as a tubular body having a substantially cylindrical configuration can be effectively fixed to the lead-in line without using a vinyl tape or a bind line.

(A) (b) and (c) are a general view showing a state in which a protective pipe is fixed to a lead-in line by a protective pipe fixing device for a lead-in line according to an embodiment of the present invention, an enlarged perspective view of a main part, and A It is -A sectional drawing. It is an external appearance perspective view of the protective tube for lead-in wires. (A) (b) And (c) is the front view which shows the closed state of an insulating cover, a side view, and a perspective view which shows an open state. It is a perspective view which shows the structure of an elastic fixing member. (A) (b) (c) thru | or (d) are explanatory drawings of an example of the assembly | attachment procedure which fixes a protection pipe to a lead-in wire bundle using the protection pipe fixing apparatus 1. FIG. (A) (b) And (c) is the figure which showed an example of the procedure which attaches an insulation cover to a lead-in wire bundle using the insulation operation rod and insulation Yatco which attached the tip tool for live wires. (A) (b) And (c) is the front view, side view, and top view which show the structure of the fixing device of the lead-in wire protective tube which concerns on other embodiment of this invention. It is a figure explaining the attachment procedure of the protection pipe | tube using a guide member.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
1 (a), (b) and (c) are a general view showing a state where a protective pipe is fixed to a lead-in line by a protective pipe fixing device for a lead-in line according to one embodiment of the present invention, an enlarged perspective view of a main part, FIG. 2 is a perspective view of the appearance of a lead-in protective tube, and FIGS. 3A, 3B, and 3C are a front view and a side view showing a closed state of the insulating cover. FIG. 4 is a perspective view showing a configuration of an elastic fixing member.

The lead-in wire protective tube fixing device (lead-in wire protective tube fixing device) 1 of the present invention includes a cylindrical through hollow portion through which the lead-in wire bundle 60 is inserted, and elastically from a cut line 51 extending substantially in the axial direction. A means for fixing a lead-in wire protective tube (hereinafter referred to as a protective tube) 50 made of an insulating material that can be freely opened and closed to the lead-in wire bundle 60 (cannot be displaced and cannot be dropped). The insulating cover 10 and the elastic fixing member 40 It is roughly composed of
The structure for fixing to the lead-in wire bundle 60 using the lead-in wire protection tube fixing device 1 is such that the elastic fixing member 40 fixed to the outer surface of the lead-in wire bundle and the opening and closing members constituting the insulating cover close to one end in the axial direction. And a lead-in wire protective tube 50 disposed on the other axial end opening side in the insulating cover in a state where the elastic fixing member is held with pressure.

The insulating cover 10 includes a pair of opening and closing members 12 and 20 that can be opened and closed via a hinge portion 30 and coupling pieces 14, 15, 24, and 25 that lock the opening and closing members in a closed state. The insulating cover 10 is formed by molding an insulating resin plate having required strength and elasticity into a required shape.
The elastic fixing member 40 can cover (enclose) the local outer peripheral surface of the lead-in wire for fixing the protective tube 50 by retrofitting, the axial length is shorter than the axial length of the insulating cover, and the lead-in wire or insulation It consists of an elastic material with a large coefficient of friction (resistance) with the cover.
As shown in FIG. 1, the insulating cover 10 is clamped over a predetermined axial length L against the outer peripheral surface near one end of the protective tube 50 in a state of surrounding a required portion of the lead-in wire bundle 60. As a result, the insulating cover 10 is fixed to the protective tube 50. Since the insulating cover 10 is in a state in which the inner drawing wire bundle 60 is elastically pinched and held via the elastic fixing member 40 arranged on the inner surface thereof, the protective tube 50 may be displaced with respect to the drawing wire bundle 60. Absent.

As shown in FIG. 2, the protective tube 50 is made of an insulating resin material having a predetermined thickness and has a cylindrical shape, and can be opened and closed by a cut line 51 extending in the axial direction. As shown in FIG. 2, in a state where the lead wire bundle 60 is not inserted into the inside, the edge located on both sides of the cut line 51 is in a contracted state. However, the drawing is made by inserting the lead wire bundle into the inside. Expand as shown in 1 (b).
In this way, the protective tube can be reduced in diameter and expanded in accordance with the thickness of the lead-in wire bundle to be inserted, so that one size of the protective tube can be shared by the lead-in wire bundles having different thicknesses. .

The insulating cover 10 shown in FIG. 3 is made of an insulating material, and is clamped and fixed to the lead wire bundle via the elastic fixing member 40 by closing each other while covering the protected portion of the three lead wire bundles 60. The two open / close members 12 and 20 and a hinge portion 30 that connects the respective end edges of the open / close members 12 and 20 so as to be freely openable and closable.
The first opening / closing member 12 includes a main body 13 that accepts a drawing wire bundle inside a concave shape, two tongue-like coupling pieces 14 and 15 projecting from the other end edge of the main body 13, and a tongue-like operation piece 16 Have.
The two coupling pieces 14 and 15 are disposed at both ends in the longitudinal direction of the other end edge of the main body 13. Mounting holes 14a and 15a are formed through the coupling pieces 14 and 15, respectively. The operation piece 16 is disposed at an appropriate position between the two coupling pieces 14 and 15 and at a position biased toward the coupling piece 15 side.

The second opening / closing member 20 includes a main body 21 that accepts a drawing wire bundle inside a concave shape, two coupling pieces 24, 25 that protrude from the other end of the main body 21, and an operation piece 26. The two coupling pieces 24 and 25 are arranged at both ends in the longitudinal direction of the other end edge of the main body 21. The operation piece 26 is disposed at an appropriate position between the coupling pieces 24 and 25 and at a position biased toward the coupling piece 24 side.
Locking protrusions 24a and 25a are provided on one surface of each of the coupling pieces 24 and 25, and both the opening and closing members 13 around the hinge portion 30 in a state where the lead wire bundle is sandwiched between the recesses of the main bodies 13 and 21. When the 21 is closed, the locking projections 24a and 25a are press-fitted into the mounting holes 14a and 15a of the coupling pieces 24 and 25 to hold the both opening and closing members in an unopenable state.

For example, as shown in FIG. 4, the elastic fixing member 40 is formed of an insulating elastic body such as rubber or resin that can be elastically deformed in a tubular shape (hollow cylindrical shape), and an opening / closing portion (cut line) 41 extending in the axial direction. Is expanded so that the drawing wire bundle is fitted into the through hole 42, and the opening / closing portion 41 can be closed after the fitting. The elastic fixing member 40 is means for fixing the inner surface of the insulating cover and the lead-in wire bundle by the frictional force to prevent displacement and dropout.
The elastic fixing member 40 may be attached in advance with a double-sided tape, an adhesive or the like so as to surround the outer surface of the lead-in wire bundle, or may be attached in advance to the inner surface near one end of the insulating cover by adhesion or the like.
The elastic fixing member 40 may have different thicknesses and diameters depending on the thickness of the drawing wire bundle to be applied, or by using a two-layer or three-layer structure that can be peeled, You may make it change the thickness corresponding to the change of thickness.
In the illustrated configuration example of the elastic fixing member, a tubular or hollow cylindrical shape is used, but a plate-like elastic material may be rolled into a tubular shape.

The axial length of the elastic fixing member 40 is about ¼ of the axial length of the insulating cover in the illustrated example, but this is only an example, and the axial direction of the elastic fixing member exceeds ¼ of the insulating cover. It may be long. In short, it is only necessary that the elastic fixing member 40 can sufficiently fix the insulating cover to the lead-in wire bundle and that the insulating cover can hold the protective tube with a sufficient clamping pressure inside the insulating cover without the elastic fixing member.
It should be noted that the opening on the left side of the protective tube in FIG. 1 may be blocked by vinyl tape or other suitable sealing member to prevent rainwater from entering, or not shown in the protective tube or insulating cover. Rainwater may be discharged from the drain hole.

Next, FIGS. 5A, 5 </ b> B, 5 </ b> C, and 5 </ b> D are explanatory diagrams of an example of an attachment procedure for fixing the protective tube to the lead-in wire bundle using the protective tube fixing device 1.
Although various attachment procedures are conceivable, as shown in FIG. 5A, one method is to first attach (temporarily fix) the elastic fixing member 40 in a state of surrounding the predetermined position of the retracting wire bundle 60 in advance. Then, after closing the opening and closing members 12 and 20 with the portion near the one end (the lower portion in the axial direction) of the insulating cover 10 so as to cover the entire outer surface of the elastic fixing member, the coupling pieces 14 and 15 and the coupling piece 24 are closed. , 25 are combined ((b)). Subsequently, the protective tube 50 fitted in advance to the outer periphery of the lead-in wire bundle is inserted from one end through an opening at the other end (the upper side in the axial direction) of the insulating cover where no elastic fixing member is present ((c) (d)). . Since the lead-in wire bundle is usually wired obliquely downward from a high place such as a utility pole to the customer's equipment located below, if the elastic fixing member is inserted into the insulating cover, the holding pressure holding force by the insulating cover can be reduced. The protective tube 50 does not fall off the insulating cover due to gravity.

The elastic fixing member 40 is bonded in advance to a required position on the inner surface of each opening / closing member 12, 20 constituting the insulating cover, and the insulating cover is put on the drawing wire bundle and fixed simultaneously with the drawing wire bundle of the elastic fixing member. If the fixing is completed, the trouble of attaching the elastic fixing member to the lead-in wire bundle can be saved.
In order to increase the frictional force between the insulating cover and the protective tube to prevent displacement and falling off, an anti-slip made of rubber, resin, etc. with high frictional resistance may be laminated in advance on the inner surface of the opening / closing member of the insulating cover. Good.
Further, the boundary between the protective tube inserted into the insulating cover and the insulating cover may be fixed with vinyl tape or the like.
Note that the above assembling work is usually carried out using an operating rod, an insulating jacket, etc., to which a tip tool for live wires is attached.

In the above embodiment, as shown in FIG. 5B, the insulating cover 10 is completely closed and fixed to the lead-in wire, and then the protective tube is inserted from the other end opening. However, the protective tube is inserted before the insulating cover is completely closed. You may do it. That is, although not illustrated, when the insulating cover is set on the outer surface of the lead-in wire bundle via the elastic fixing member 40, only the coupling pieces 14 and 24 near the one end where the elastic fixing member is arranged are coupled, and the other coupling is performed. The pieces 15 and 25 are not connected. In such a state, the opening of the insulating cover located on the upper side in the axial direction is not completely closed, and the inner diameter is gentle. For this reason, resistance at the time of inserting one end of the protective tube is reduced, it can be easily inserted to a position where it comes into contact with the elastic fixing member 40, and the coupling pieces 15, 25 may be closed after the insertion is completed.
Alternatively, after the elastic fixing member 40 is fixed to the outer surface of the drawing wire bundle, the protective tube is set on the outer surface of the drawing wire bundle so that the outer surface of the elastic fixing member 40 is covered by the inner surface of one end of the protective tube. The insulating cover 10 may be covered and fixed. In this case, one end of the protective tube is held by the elastic fixing member and the insulating cover, so that the fixing is ensured.

Next, FIGS. 6 (a), 6 (b) and 6 (c) show an example of a procedure for attaching the insulating cover to the lead-in wire bundle by using an insulating operation rod and an insulating jacket attached with a hot wire tip tool.
6 (a), 6 (b), and 6 (c) show a procedure for fixing (locking) the insulating cover 10 to the lead-in wire bundle 60 with a cover presser 100 as a tip tool.
As a premise of this work, the elastic fixing member 40 is attached in a state of enclosing the lead-in wire bundle 60 composed of three lead-in wires.
The cover presser 100 attached to the tip of the insulation operation rod (hot stick) 110 has a hook portion 101 having a shape corresponding to the outer surface of the insulation cover 10 at the tip, and two operations of the insulation cover below it. A clamping part 102 that clamps one of the pieces 16 and 26 is provided.

  When covering the insulating cover 10 in which the two opening and closing members 12 and 20 are in an open state on the lead-in wire bundle (elastic fixing member), in this example, the operation piece 26 is held by the holding portion 102 so that the opening portion is directed downward. In this state, the entire insulating cover 10 is once raised above the lead-in wire bundle 60 as shown in FIG. With the open portion of the insulating cover 10 positioned above the lead wire bundle attachment site, the insulating cover is lowered to bring the outer surface of the elastic fixing member 40 into contact with the inner surface of the insulating cover (between the opening and closing members), and then the cover presser When the tool 100 is lowered, the operation piece 26 is detached from the holding portion 102, and the state shown in FIGS. In the state of (b), the insulating cover 10 is pressed by the hook portion 101 of the cover presser 100 so as to be temporarily locked to the lead-in wire bundle.

Next, as shown in FIG. 6 (c), the crimping operation of the respective connecting pieces using the insulating jacket 130 is performed. That is, one worker presses the insulating cover 10 against the pull-in wire bundle 60 with the cover presser 100, and the other worker uses the insulating jacket 130 to sandwich the one coupling piece 14, 24 and crimp it. Next, the cover retainer 100 is removed from the insulating cover, and the other coupling pieces 15 and 25 are crimped.
The state where the mounting operation is completed is the state shown in FIGS. 1 and 5B, respectively.
With the insulating cover 10 positioned and fixed to the lead-in wire bundle 60 in this manner, the installation of the protective tube can be completed by inserting one end of the protective tube 50 from the upper opening of the insulating cover.
As described above, it is possible to loosen the opening on the side where the protective tube is inserted by initially setting only one of the coupling pieces 14 and 24 in a crimped state and the other coupling pieces 15 and 25 in an uncoupled state. It is possible to facilitate the operation of inserting the protective tube. What is necessary is just to couple | bond the coupling pieces 15 and 25 after insertion of a protective tube.

Next, FIGS. 7A, 7B, and 7C are a front view, a side view, and a plan view showing a configuration of a securing device for a lead-in wire protective tube according to another embodiment of the present invention. FIG. 8 is a diagram for explaining a procedure for attaching a protective tube using a guide member.
The fixing device for the lead-in wire protection tube is formed by moving each open / close member along the axial direction while opening the lead-in wire protection tube 50 on the outer surface of each open / close member 12, 20 constituting the insulating cover 10. The guide member 35 that can be moved to the outer surface of the lead-in wire bundle penetrating the wire is characteristic.
That is, a guide member 35 extending in a direction crossing the axial direction of the insulating cover is provided on the outer surface of each opening / closing member, and each guide member supports the inner surface of the lead-in wire protection tube by a respective leading edge 35a. A configuration is provided that allows the lead-in wire protection tube to move in the axial direction while maintaining the open state of the wire protection tube.
The protruding length of the guide protrusion from the side surface of each opening / closing member may be constant, or may be expanded in a tapered shape toward the left in FIG.

  When the protective tube 50 is set to the lead-in wire bundle using the guide member 35, first, as shown in FIG. 8, in the state where the lead-in wire bundle 60 is inserted into the insulating cover 10 and both the opening and closing members are closed, The inner surface of the protective tube 50-1 having one end opened from the cut line 51 is placed on the leading edges 35a of both guide members 35 protruding from the side surfaces of the respective opening / closing members. Subsequently, when the protective tube is moved in the axial direction (left direction in FIG. 8), the leading edge 35a of the guide member is released while contacting the inner surfaces of the protective tubes 50-2 and 50-3 even during the movement. Maintain the state. As indicated by reference numeral 50-4, since the distal end of the protective tube remains open even after the distal end (left end) of the protective tube exceeds the left end of the guide member and the opening / closing member, it extends from the left opening of the insulating cover. It progresses in the state which covered the outer surface of the pulling-in wire bundle 60 currently. As the protective tube 50-4 advances to the left, as the left end side of the protective tube moves away from the guide member 35, the influence of the spreading action by the guide member decreases, so it gradually closes by the original restoring force. Cover the outer surface of the lead-in wire bundle in a closed state. As the protective tube moves to the left, the subsequent portion of the protective tube also sequentially moves onto the lead-in wire bundle. When the rear end of the protective tube exceeds the left end of the guide member and opening / closing member, the transition of the entire protective tube onto the retractable wire bundle is completed, and the protective tube is closed by its original restoring force and attached to the outer surface of the retractable wire bundle. (50-5).

After the protective tube is completely moved to the lead-in wire bundle side, the assembly work such as inserting the protective tube into the inside from the other end opening of the insulating cover is performed.
When the protruding length of the guide member 35 from the side surface of each opening / closing member is increased so as to be tapered toward the left in the drawing, the protection tube is opened as the protection tube moves to the left. Since the amount increases, the protective pipe can be installed smoothly.
When the guide member 35 is not present, it is necessary to perform an intricate work of covering the outer surface of the lead-in wire bundle while opening the protective tube over the entire length using an insulating operation rod equipped with a live wire tool or an insulating jacket. However, if the insulating cover itself is provided with the guide member 35 as in the present embodiment, the protective tube is opened when it is sequentially opened from the opening side near the one end of the protective tube and hooked on the leading edge 35a of each guide member. Can be secured and maintained. By moving the protective tube in the axial direction along the guide member in this state, the protective tube can move over the insulating cover and move to the lead-in side.

<Summary of Configuration, Action, and Effect of the Present Invention>
The lead-in wire protection tube fixing device 1 according to the first aspect of the present invention includes a lead-in wire protection tube 50 that includes a through hollow portion through which the lead-in wire bundle 60 is inserted and that can be elastically opened and closed from a cut line 51 that extends substantially in the axial direction. A means for fixing to the outer surface of the lead-in wire bundle, a pair of openable / closable members 12, 20 that can be opened and closed via a hinge portion 30, and coupling pieces 14, 15, 24, 25 that couple the paired open / close members in a closed state. And an elastic fixing member 40 that can be attached to the outer surface of the lead-in wire bundle that fixes the lead-in wire protection tube and whose axial length is shorter than the axial length of the insulating cover. It is characterized by that.
The lead-in wire protective tube fixing device 1 as a means for fixing the lead-in wire bundle to the lead-in wire bundle in a state where the lead-in wire bundle is inserted into the lead-in wire protective tube, which is a tubular body made of an insulating resin, includes two parts: an insulating cover 10 and an elastic fixing member 40. It is a simple structure consisting of It is possible to solve problems such as damage to the lead-in wire, which is a problem occurring in fixing with a conventional vinyl tape or bind wire, all at once.

In the lead-in wire protective tube fixing device 1 according to the second aspect of the present invention, guide members 35 extending in a direction intersecting with the axial direction of the insulating cover are provided on the outer surface of each opening / closing member, and each guide member has a tip end edge thereof. Thus, the inner surface of the lead-in wire protective tube 50 is supported to allow the lead-in wire protective tube to move in the axial direction while maintaining the open state of the lead-in wire protective tube.
The lead-in line protection pipe is a pipe body having a cut line 51 extending in the axial direction, and in order to cover this on the outer surface of the lead-in line bundle, it is necessary to open the protective pipe from the cut line using an indirect hot wire tool. is there. When the protective tube is long, it is necessary to work with an insulating operation rod and an insulating jacket with a tip tool for live wires, but this is not easy.

According to the present invention, the lead-in wire protection tube is pulled through the inside of the insulating cover by moving the lead-in wire protection tube in the axial direction while keeping the lead-in wire protection tube open by the leading edge of each guide member. It can be moved to the outer surface of the wire bundle.
That is, according to the present invention, after maintaining the open state of the protective tube by opening one end side of the protective tube in the axial direction and applying the inner surface of the protective tube to the leading edge of each guide member, the outer surface of the insulating cover If the protective tube is moved in the axial direction along the direction of It will be certain.
After the protective tube is moved to the lead-in wire bundle side, an assembling operation such as inserting into the inside from the other end opening of the insulating cover is performed.

The structure for fixing the protective tube fixing device to the lead-in wire according to the third aspect of the present invention includes an elastic fixing member 40 fixed to the outer surface of the lead-in wire bundle, and an elastic fixing member near one end in the axial direction by closing each opening / closing member. And a lead-in wire protection tube 50 disposed on the other end opening side in the axial direction in the insulating cover.
Since the elastic fixing member is located near one end in the axial direction of the insulating cover, a space for accommodating the protective tube is formed inside the other end of the insulating cover. In this fixed structure, one end of the lead-in wire protective tube is inserted from the other axial end opening of the insulating cover when the protective tube is installed in this space. Such assembling work is easy even in work using various tools for live lines.

According to a fourth aspect of the present invention, there is provided a method for fixing a protective tube fixing device, which is a fixing method for a retractable wire bundle installed in a non-horizontal posture, and a step of attaching an elastic fixing member to the outer surface of the retractable wire bundle; The insulating cover is fixed to the lead-in wire bundle by closing the pair of opening and closing members so that the member is positioned closer to the lower end in the axial direction, and is protected in the upper opening in the axial direction of the fixing member. And a step of inserting a tube.
Since there are few components and the number of assembly steps is small, workability can be improved and the burden on the operator can be greatly reduced.
The lead-in line is routed downward from the utility pole or the like toward the customer's equipment. For this reason, the elastic fixing member is disposed on the lower side of the insulating cover, and the protective tube can be fixed to the lead-in wire bundle by the sandwiching pressure and gravity of the insulating cover by inserting the protective tube through the upper opening of the insulating cover.

  DESCRIPTION OF SYMBOLS 1 ... Lead-in wire protection tube fixing device (protection tube fixing device), 10 ... Insulating cover, 12, 20 ... Opening and closing member, 13, 21 ... Main body, 14, 15, 24, 25 ... Connection piece, 16 ... Operation piece, 26 ... Operation piece, 30 ... Hinge part, 35 ... Guide member, 35a ... End edge, 40 ... Elastic fixing member, 41 ... Opening / closing part, 42 ... Through hole, 50 ... Pull-in wire protective tube, 51 ... Cut line, 60 ... Wire bundle, 100 ... Cover presser, 101 ... Hook part, 102 ... Clamping part, 130 ... Insulating yarn

Claims (4)

A lead-in wire protective tube fixing device that includes a through-hole portion through which the lead-in wire bundle is inserted and that fixes a lead-in wire protective tube that is elastically openable and closable from a cut line extending substantially in the axial direction to the outer surface of the lead-in wire bundle,
A pair of opening and closing members that can be freely opened and closed via a hinge portion, and an insulating cover including a coupling piece that couples the pair of opening and closing members in a closed state;
An elastic fixing member that is attachable to the outer surface of the lead-in wire bundle that fixes the lead-in wire protection tube, and whose axial length is shorter than the axial length of the insulating cover;
A lead-in wire protective tube fixing device. Guide members extending in a direction intersecting the axial direction of the insulating cover are respectively provided on the outer surfaces of the opening and closing members,
Each guide member is configured to support the inner surface of the lead-in wire protection tube by a respective leading edge to allow the lead-in wire protection tube to move in the axial direction while maintaining the open state of the lead-in wire protection tube. The lead-in wire protective tube fixing device according to claim 1, further comprising: A structure for fixing the lead-in wire protective tube fixing device according to claim 1 or 2 to the lead-in wire,
The elastic fixing member fixed to the outer surface of the lead-in wire bundle, and the other axial end in the insulating cover in a state where the elastic fixing member is clamped and held near the one end in the axial direction by closing the opening and closing members. A structure for fixing a protection tube fixing device to a service wire, comprising the service wire protection tube arranged on the opening side. The method for fixing a protective tube fixing device according to claim 1 or 2, with respect to the lead-in wire bundle installed in a non-horizontal posture,
Attaching the elastic fixing member to the outer surface of the lead-in wire bundle;
Fixing the insulating cover to the lead-in wire bundle by closing the pair of opening and closing members so that the elastic fixing member is positioned closer to the lower end in the axial direction and then connecting with the connecting piece;
Inserting the protective tube into the axially upper opening of the fixing member;
A method for fixing a protective tube fixing device.

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