JP6458939B2 - Telescopic insulation armor for electric wires - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a stretchable insulation protector for electric wires suitable for protecting a charged portion of an electric wire when performing an indirect hot wire operation.

Conventionally, when carrying out wire work such as overhead distribution lines, indirect hot wire work is used in which the work is carried out while the wires are energized.
In addition, in indirect hot wire work, by covering the charged part of the wire with a wire protection sheet in advance, it is possible to prevent the occurrence of unforeseen accidents such as an electric shock or short circuit caused by an operator during work. ing.

  Such an electric wire protection sheet is provided with a sheet-like member 111, a clip clip 112, and two rod-like bodies 113, for example, like an electric wire protection sheet 110 shown in FIG.

  The sheet-like member 111 is an insulating rectangular sheet, and the electric wire is placed on the back surface that is folded in half, and is fastened to the electric wire by the clip clip 112 from the front surface.

The pinching clip 112 includes a pair of gripping portions 112a and a pair of pinching portions 112b biased so as to be normally closed.
A hole 112c is formed at the tip of the sandwiching part 112b.

The rod-shaped body 113 is a round bar, and is substantially parallel to the fold line when the sheet-like member 111 is folded in two on the surface of the sheet-like member 111 and the open end of the sheet-like member 111 folded in half. One is attached in the vicinity.
The rod-shaped body 113 is inserted into the hole 112c of the clip-in clip 112, and the tip ends of the pair of clip-in portions 112b of the clip-in clip 112 are attached to the two rod-shaped bodies 113, respectively.

  The electric wire protection sheet 110 is formed by sandwiching the pair of gripping portions 112a of the pinching clip 112 using a hook or the like, opening the pair of pinching portions 112b, and opening the open end of the folded sheet-like member 111. Attached to.

  However, the wire protection sheet 110 can protect only a portion corresponding to the length of the sheet-like member 112 of the wire, and cannot protect the portion protruding from the sheet-like member 112 of the wire. It was.

As a technique for solving such a problem, in the following Patent Document 1, the applicant of the present invention can lay so as to cover the periphery of the high-voltage underline and can expand and contract in a bellows shape along the high-voltage underline. An armor body, a pair of clips that are provided at both ends of the armor body so that the armor body can be sandwiched, and a telescopic guide member that is provided between the pair of clips and guides the movement of the armor body in the stretching direction. It proposes a telescopic insulation armor equipped with
In addition, in the following Patent Document 2, the present applicant has a pair of insulating sheet members and a pair of clips that extend in the same direction and face each other, and each of the pair of sheet members. A first clip mounting portion for fixing a clamping portion forming a pair of one clip is provided at one end portion, and a second clip mounting portion for fixing a clamping portion forming a pair of the other clip is provided at each other end portion. Proposing a telescopic insulation protective device in which each sheet member is constructed by connecting folded pieces that are folded several times, and a magnet that adsorbs adjacent folded pieces to each folded piece is provided. Yes.
Further, the applicant of the present invention has a pair of clips and a pair of sheet housing blocks accommodated so as to be able to be drawn out in a state where the insulating sheet member is wound in a roll shape in Patent Document 3 below. In addition, there has been proposed a telescopic insulation protector in which a pair of clips are connected by an extendable insulating telescopic rod (see FIG. 5 of the publication).

JP 2013-192302 A JP 2013-192304 A JP2013-192306A

However, the telescopic insulation protector proposed in Patent Document 1 is not particularly problematic when used for a short period of time, but when used for a long period of time, there is a risk that the expansion and contraction function may be reduced due to deterioration of the spring member. There is a problem that there is.
The telescopic insulation protector proposed in Patent Document 2 has no particular problem when used in the short term, but has a problem that there is a risk of damage due to deterioration of the joint portion when used in the long term. .
In the telescopic insulation protector proposed in Patent Document 3 above, there is no particular problem when protecting a straight wire such as a high-voltage underline, but when protecting a bent wire such as an edge line. There is a problem that the telescopic bar becomes an obstacle.

  An object of the present invention is to provide a stretchable insulation protector for electric wires that can be used for a long period of time or used for bent wires.

The stretchable insulation protector for electric wires of the present invention is a stretchable insulation protector for wires (1) for protecting the charged portion of the wire (A), and includes first and second protective sheets (10, 20). The first and second protective sheets respectively include first and second sheet-like members (11, 21) which are insulating rectangular sheets, and the surface of the first sheet-like member has 2 One slide rail (14) is substantially parallel to the fold line when the first sheet-like member is folded in half, and 1 near the open end of the first sheet-like member folded in half. Two engagement members (24), which are attached to each other, and engage with the two slide rails on the back surface of the second sheet-like member, fold the second sheet-like member in half. The second shape is substantially parallel to the fold line when the Wherein the attached one by one in the vicinity of the open end of the over preparative shaped member.
Here, the first protective sheet has a pair of first gripping portions (12a) and a pair of first sandwiching portions (12b) biased so as to be normally closed. A first clip that is folded in parallel with the fold line when the first sheet-like member is folded in two on the surface of the first clip-like clip (12) and the first sheet-like member Two first rods (13) attached one by one in the vicinity of the open end of the member, and the first rod has a length that is the width of the first sheet member. And is attached so that one end surface thereof is at the same position as one side of the first sheet-like member, and the slide rail has a diameter of the first rod-like body. And one end face is fixed to the other end face of the first rod-like body. And the other end surface is attached to the same position as the other side of the first sheet-like member, and the front ends of the pair of first sandwiching portions of the first sandwiching clip are 2 Each may be fixed to the first rod-like body of the book.
The second protective sheet includes a pair of second gripping portions (22a) and a pair of second sandwiching clips (22b) biased so as to be normally closed. 22) and the surface of the second sheet-like member is substantially parallel to the folding line when the second sheet-like member is folded in half, and the second sheet-like member is folded in half. Two second rod-like bodies (23) attached one by one in the vicinity of the open end, and the second rod-like body has a length smaller than the width of the second sheet-like member. It is a round bar and is attached so that one end surface thereof is located at the same position as one side of the second sheet-like member, and the ends of the pair of second clip portions of the second clip clip The portions may be respectively fixed to the two second rod-shaped bodies.
The engagement member is attached so that the length is the same as the width of the second sheet-like member, and one end is located on the back side of the second rod-like body via the second sheet-like member It may be done.
The engaging member may have a length smaller than a width of the second sheet-like member and may be attached to the other side portion of the second sheet-like member.
An opening may be formed on the surface of the slide rail substantially parallel to a fold line when the first sheet-like member is folded in half.
The engaging member includes a rubber rectangular plate portion (24a) whose back surface is fixed to the back surface of the second sheet-like member, and a rubber round bar portion (24b) whose diameter is smaller than the inner diameter of the slide rail. ), A wire-like core wire (24c) embedded in the central portion of the round bar portion, and a rubber connecting plate portion (24d) for connecting the rectangular plate portion and the round bar portion. And the connecting plate portion may have a size that can pass through the opening of the slide rail.

The stretchable armor for electric wires of the present invention has the following effects.
(1) Since the slide rail and the engaging member do not deteriorate even when used for a long time like a spring member or a connecting portion, they can be used for a long time.
(2) By configuring the engaging member so that it can be bent when the end of the engaging member is pushed by hand, it can be used not only for a straight electric wire but also for a bent electric wire.

It is a figure for demonstrating the structure of the expansion-contraction insulation protector 10 for electric wires by one Example of this invention. It is a figure for demonstrating the usage method of the expansion-contraction insulation protector 10 for electric wires shown in FIG. It is a figure for demonstrating the structure of the conventional electric wire protection sheet.

  The above object is achieved by attaching two slide rails to the surface of the first sheet-like member of the first protective sheet and engaging the two slide rails on the back surface of the second sheet-like member of the second protective sheet. This was realized by attaching two engaging members to be joined.

Hereinafter, embodiments of the expansion / contraction insulation for electric wires of the present invention will be described with reference to the drawings.
As shown in FIG. 1 (a), a wire expansion / contraction insulation protector 1 according to an embodiment of the present invention (hereinafter referred to as "expansion insulation protector 1") is provided with first and second protection sheets 10,20. It has.

  The first protective sheet 10 includes a first sheet-like member 11, a first clip clip 12, two first rod-like bodies 13, and two slide rails 14.

  Here, the first sheet-like member 11 is the same as the sheet-like member 111 shown in FIG. 3, and is an insulating rectangular sheet.

The first clip-type clip 12 is the same as the clip-type clip 112 shown in FIG. 3, and a pair of first grip portions 12a and a pair of first clips urged so as to be normally closed. And a sandwiching portion 12b.
A first hole 12c (not shown) is formed at the tip of the first sandwiching portion 12b.

The first rod-like body 13 is a round bar, and is substantially parallel to the fold line when the first sheet-like member 11 is folded in two on the surface of the first sheet-like member 11 and is folded in two. 3 is the same as the rod-shaped body 113 shown in FIG. 3 in that each of the first sheet-like members 11 is attached in the vicinity of the open end, but the following two points are shown in FIG. This is different from the rod-like body 113 (see FIG. 1B).
(1) The length is about one quarter of the width (lateral length) of the first sheet-like member 11.
(2) The left end surface (one end surface) is attached to the surface of the first sheet-like member 11 so that the left side (one side) of the first sheet-like member 11 is at the same position.

  The first rod-like body 13 is inserted into the first hole 12c of the first clip clip 12, and the distal ends of the pair of first clip parts 12b of the first clip clip 12 are 2 pieces. It is fixed to the first rod-like body 13 of the book.

The slide rail 14 has a substantially cylindrical shape whose length is about three-fourths of the length of the first sheet-like member 11 in the lateral direction and whose diameter is the same as the diameter of the first rod-like body 13. As shown in FIG. 1B, the left end face (one end face) is fixed to the right end face (the other end face) of the first rod-like body 13 on the surface of the first sheet-like member 11 and the right end face ( The other end surface is attached one by one near the open end of the first sheet-like member 11 folded in half so that the right side (other side) of the first sheet-like member 11 is located at the same position. .
In addition, an opening is formed on the surface of the slide rail 14 substantially parallel to a fold line when the first sheet-like member 11 is folded in half (that is, the slide rail 14 has a C-shaped cross section). Have been).

  The second protective sheet 20 includes a second sheet-like member 21, a second clip clip 22, two second rod-like bodies 23, and two engagement members 24.

  Here, the second sheet-like member 21 is the same as the first sheet-like member 11, and is an insulating rectangular sheet.

The second pinching clip 22 is the same as the first pinching clip 12, and a pair of second gripping portions 22a and a pair of second pinching members urged to be normally closed. Part 22b.
A second hole 22c (not shown) is formed at the tip of the second sandwiching portion 22b.

The 2nd rod-shaped body 23 is a round bar, and the fold line when the 2nd sheet-like member 21 is folded in two on the surface of the 2nd sheet-like member 21 (refer the broken line of FIG.1 (c)). Is the same as the first rod-like body 13 in that it is attached one by one in the vicinity of the open end of the second sheet-like member 21 that is folded in half. It differs from the 1st rod-shaped body 13 by one point (refer Fig.1 (a)).
(1) The length is about 1/6 of the width (lateral length) of the second sheet-like member 21.
(2) The right end surface (one end surface) is attached to the surface of the second sheet-like member 21 so that the right side (one side) of the second sheet-like member 21 is at the same position.

The engaging member 24 has the same length as the width of the second sheet-like member 21, and the second sheet-like member has a right end portion (one end portion) located on the back side of the second rod-like body 23. One is attached approximately parallel to the fold line when 21 is folded in half and near the open end of the second sheet-like member 21 folded in half.
Further, as shown in FIG. 1 (d), the engaging member 24 includes a rubber rectangular plate portion 24 a whose back surface is fixed to the back surface of the second sheet-like member 21, and the diameter of the first protective sheet 10. The rubber round bar portion 24b smaller than the inner diameter of the slide rail 14, the wire-like core wire 24c embedded in the center portion of the round bar portion 24b, the rectangular plate portion 24a and the round bar portion 24b are connected. And a connecting plate portion 24d made of rubber.
Here, the core wire 24c gives the engagement member 24 flexibility, and the engagement member 24 normally maintains a certain shape, but is engaged when the end of the engagement member 24 is pushed by hand. This is because the member 24 can be bent.
The connecting plate portion 24d is sized so as to be able to penetrate the opening of the slide rail 14. As a result, the first and second sheet-like members 11, 21 are folded in two and the two engagement members are in a state where the second sheet-like member 21 is positioned outside the first sheet-like member 11. When 24 is engaged with the two slide rails 14, the second sheet-like member 21 can be slid along the width direction of the first sheet-like member 11.

Next, the usage method of the expansion / contraction insulation armor 1 is demonstrated with reference to Fig.2 (a)-(c).
Before the start of the work, the worker folds the first and second sheet-like members 11 and 21 and folds the second sheet-like member 21 to the first sheet-like member as shown in FIG. After the two engaging members 24 are engaged with the two slide rails 14 in a state of being positioned on the outside of the first sheet member 11, the second sheet member 21 is moved along the width direction of the first sheet member 11. And slide it to the end.

In order to protect the electric wire A that extends straight in the lateral direction, the worker holds the pair of first gripping portions 12a of the first clip clip 12 by using a yatco etc. The part 12b is opened, the open end of the half-folded first sheet-like member 11 is opened, and the first wire protection sheet 10 is placed on the left half of the protection range of the wire A.
Subsequently, as shown by an arrow in FIG. 2B, the worker pulls the second wire protection sheet 20 in the opposite direction to the first wire protection sheet 10 by using a yatco etc. The member 21 is slid along the width direction of the first sheet member 11 to the right half of the protection range of the electric wire A.
Subsequently, the worker uses a Yatco or the like to sandwich the pair of second gripping portions 22a of the second sandwiching clip 22 to open the pair of second sandwiching portions 22b, and to fold the second The open end of the sheet-like member 21 is opened, and the second wire protection sheet 20 is put on the remaining portion of the protection range of the wire A.
Thereby, the 1st and 2nd electric wire protection sheets 10 and 20 can be covered over the whole protection range of the electric wire A. FIG.
Further, since the open end of the second sheet-like member 21 is closed by the two engaging members 24, the second and second wire protection sheets 10 and 20 are put on the protection range of the electric wire A and then the second end. It is possible to prevent the open end of the sheet-like member 21 from being opened and closed by wind or the like.

  Even when a straight electric wire is protected in the vertical direction such as a high-voltage underline, the direction of covering the first and second electric wire protection sheets 10 and 20 is only from the horizontal direction to the vertical direction. By the same procedure, the first and second electric wire protection sheets 10 and 20 can be put on the protection range.

When protecting the electric wire A whose right side portion is bent downward, the worker holds the pair of first gripping portions 12a of the first pinching clip 12 by using a yatco or the like. 1 is opened, the open end of the first sheet-like member 11 folded in half is opened, and the first wire protection sheet 10 is placed on the left half of the protection range of the wire A.
Subsequently, as shown by an arrow in FIG. 2C, the worker pulls the second wire protection sheet 20 in the opposite direction to the first wire protection sheet 10 using a yatco or the like, so that the second sheet The member 21 is slid along the width direction of the first sheet member 11 to the right half of the protection range of the electric wire A.
Subsequently, as shown by an arrow in FIG. 2 (c), the worker holds the pair of second gripping portions 22a of the second holding clip 22 with a pair of jaws or the like. Opening the second pinching portion 22b, pulling down the right end of the second wire protection sheet 20 with the open end of the second sheet-like member 21 folded in half open, and connecting the second wire protection sheet 20 to the wire Cover the rest of A's protective area.
Thereby, since the right end portion of the engaging member 24 of the second wire protection sheet 20 is pulled down and bent, even if the right side portion of the wire A is bent downward as shown in FIG. The first and second electric wire protection sheets 10 and 20 can be covered over the entire protection range.
Further, since the open end of the second sheet-like member 21 is closed by the two engaging members 24, the second and second wire protection sheets 10 and 20 are put on the protection range of the electric wire A and then the second end. It is possible to prevent the open end of the sheet-like member 21 from being opened and closed by wind or the like.

  In the case of protecting an electric wire whose left and right portions are bent downward, such as an edge line, the first electric wire protection sheet 10 is attached to the left portion of the electric wire in an oblique upper right direction. Since the engaging member 24 of the second wire protection sheet 20 bends freely when a force is applied, the first and second wire protection sheets 10 and 20 can be covered over the entire protection range by the same procedure. .

  In the above description, the length of the engaging member 24 is the same as the width of the second sheet-like member 21, but the length is reduced (for example, as large as a runner used in a home curtain rail). In addition, it may be attached to the left end portion of the second sheet-like member 21.

Further, although the opening is formed on the surface of the slide rail 14, the opening may be formed on the lower surface of the slide rail 14.
In this case, the round bar portion 24b of the engaging member 24 faces the upper side with respect to the rectangular plate portion 24a.

DESCRIPTION OF SYMBOLS 1 Telescopic insulation protector 10,20 1st and 2nd protection sheet | seat 11,21 1st and 2nd sheet-like member 12,22 1st and 2nd pinching-type clip 12a, 22a 1st and 2nd grip part 12b, 22b 1st and 2nd clamping parts 12c, 22c 1st and 2nd hole parts 13 and 23 1st and 2nd rod-shaped body 14 Slide rail 24 Engagement member 24a Rectangular plate part 24b Round bar part 24c Center Wire 24d Connecting plate part 110 Electric wire protection sheet 111 Sheet-like member 112 Clamping clip 112a Grasping part 112b Clamping part 112c Hole part 113 Rod-shaped body A Electric wire

Claims (7)

An electric wire expansion / contraction protective armor (1) for protecting the charged portion of the electric wire (A),
Comprising first and second protective sheets (10, 20);
The first and second protective sheets respectively include first and second sheet-like members (11, 21) which are insulating rectangular sheets,
Two slide rails (14) are formed on the surface of the first sheet-like member so as to be substantially parallel to the fold line when the first sheet-like member is folded in two and folded in two. One is attached near the open end of one sheet-like member,
Two engagement members (24) respectively engaged with the two slide rails on the back surface of the second sheet-like member are fold lines when the second sheet-like member is folded in half. Are attached one by one in the vicinity of the open end of the second sheet-like member which is substantially parallel and folded in half,
A stretchable insulation armor for electric wires, characterized in that. The first protective sheet is
A first pinching clip (12) having a pair of first gripping portions (12a) and a pair of first pinching portions (12b) biased to be normally closed;
On the surface of the first sheet-like member, substantially parallel to the fold line when the first sheet-like member is folded in two and near the open end of the first sheet-like member folded in half And two first rods (13) attached one by one to
The first rod-like body is a round bar whose length is smaller than the width of the first sheet-like member, and one end face is located at the same position as one side of the first sheet-like member. Installed,
The slide rail has a substantially cylindrical shape whose diameter is the same as the diameter of the first rod-shaped body, one end surface is fixed to the other end surface of the first rod-shaped body, and the other end surface is the first rod-shaped body. It is attached to be in the same position as the other side of the sheet-like member,
The tip portions of the pair of first sandwiching portions of the first sandwiching clip are fixed to the two first rod-like bodies, respectively.
The expansion / contraction insulation protector for electric wires according to claim 1, wherein The second protective sheet is
A second pinching clip (22) having a pair of second gripping portions (22a) and a pair of second pinching portions (22b) biased to be normally closed;
On the surface of the second sheet-like member, substantially parallel to the fold line when the second sheet-like member is folded in two and in the vicinity of the open end of the second sheet-like member folded in half And two second rods (23) attached one by one to
The second rod-shaped body is a round bar whose length is smaller than the width of the second sheet-like member, and one end surface thereof is located at the same position as one side of the second sheet-like member. Installed,
The tip portions of the pair of second sandwiching portions of the second sandwiching clip are fixed to the two second rod-shaped bodies, respectively.
The expansion / contraction insulation protector for electric wires of Claim 1 or 2 characterized by the above-mentioned. The engagement member is attached so that the length is the same as the width of the second sheet-like member, and one end is located on the back side of the second rod-like body via the second sheet-like member The expansion / contraction insulation protector for electric wires according to claim 3, wherein   The engagement member has a length smaller than a width of the second sheet-like member, and is attached to the other side portion of the second sheet-like member. The expansion-contraction insulation armature for electric wires in any one.   6. The opening according to claim 1, wherein an opening is formed on the surface of the slide rail substantially parallel to a fold line when the first sheet-like member is folded in half. Telescopic insulation armor for electric wires. The engaging member is
A rubber rectangular plate (24a) having a back surface fixed to the back surface of the second sheet-like member;
A rubber round bar (24b) having a diameter smaller than the inner diameter of the slide rail;
A wire-like core wire (24c) embedded in the center of the round bar,
A rubber connecting plate portion (24d) for connecting the rectangular plate portion and the round bar portion;
The connecting plate portion has a size that can penetrate the opening of the slide rail.
The expansion / contraction insulation protector for electric wires according to claim 6 characterized by things.

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