JP5188098B2 - Protective cover - Google Patents

Description

  The present invention relates to a protective cover used for preventing a ground fault or the like, for example, in a hot wire operation in an overhead distribution line.

  Conventionally, when hot wire work is performed in an aerial distribution line, a protective cover is put on a protective object such as an electric wire, a brace, or an insulator to prevent ground faults (see, for example, Patent Document 1). A conventional protective cover includes a flexible and flexible rectangular insulating sheet as a cover body, and a sheet fixing scissors (hereinafter referred to as “clip”) for fixing the insulating sheet. This clip includes a gripping part that sandwiches the insulating sheet in a gently folded shape and an opening / closing operation part having a torsion spring.

For example, when performing an indirect hot wire operation, the gripping portion of the clip is gripped by the operation rod, and the opening / closing operation portion is opened so that the insulating sheet placed on the protection target is sandwiched. Then, when the operating rod is released from the gripping portion, the opening / closing operation portion is closed by the action of the torsion spring, whereby the clip fixes the insulating sheet so as not to be separated from the protection target. At this time, the grip portion of the clip protrudes from the insulating sheet side.
Japanese Patent Laid-Open No. 9-191518

  When the hot-line operation is performed with the insulating sheet fixed with the clip, the gripping portion of the clip protrudes, and this gripping portion becomes an obstacle during the operation. Particularly in the case of indirect hot line work, the operator performs work using a control rod from a position away from the work location, so that the gripping portion of the clip interferes with the operation of the control rod, and workability is reduced. It was getting worse.

  Then, this invention makes it a subject to provide the protective cover which can protect a protection target object reliably without using a clip, and can perform a hot-line operation | work smoothly.

The present invention is to solve the above-described problems, and is a protective cover for protecting a protection target object when performing live-line work on an overhead distribution line, and is configured by an insulating material and protected. e Bei the cover body configured to partially open shape so as to surround by engaged objects inside, the cover body includes a body portion having a shape that surrounds the protective object, the at least one end of the barrel And a shape-retaining portion that retains the shape of the body portion so as to maintain an enclosed state in which the body portion surrounds the object to be protected, and the body portion and the shape-retaining portion communicate with each other so as to inject gas. And at least one of the body portion and the shape retaining portion includes an injection port for injecting gas into the injection chamber.

  According to such a configuration, the trunk portion of the cover body is held by the shape-retaining portion, so that the barrel portion can always maintain an enclosure state that surrounds the protection target object. An object can be reliably protected, and a live work can be smoothly performed without using a clip.

Also, by injecting gas into the injection chamber formed in the trunk, for example, when an indirect live work tool such as an operating rod hits the trunk during an indirect live work, the impact can be absorbed, This prevents the impact from being transmitted to the object to be protected and prevents its damage.

In addition, the shape-retaining part is provided with a gas injection chamber inside, so that it is possible to absorb an impact when, for example, an indirect hot wire work tool such as an operating rod comes into contact during an indirect hot wire work. As a result, the protective cover can be reliably protected from damage to the object to be protected. Further, by connecting the injection chamber of the shape retaining portion and the injection chamber of the barrel portion, the injection chamber of the shape retention portion can be obtained simply by injecting gas from the injection port provided in at least one of the shape retention portion and the barrel portion. In addition, the gas can be filled in both the injection chamber and the injection chamber of the trunk portion, and the injection operation can be easily performed.

  Further, the shape retaining portion is formed in a long shape such that the end portions are close to each other, and the end portions are spaced apart from each other at a predetermined interval so as to make a part of the cover main body open. You may be comprised so that expansion / contraction is possible so that the protection target object larger than the space | interval of an edge part may pass between the edge parts of a shape-retaining part.

  According to this configuration, the shape retaining portion is reduced when the protective object is engaged with the cover body by reducing the distance between the end portions of the shape retaining portion and by allowing the shape retaining portion to be expanded and contracted. When the end portions are deformed so that the distance between them is increased, the distance between the open portions of the cover main body is increased, and the object to be protected can be engaged inside thereof.

  Then, after the protective measure is engaged inside the cover main body, when the shape retaining portion is returned to the original shape, the distance between the ends of the shape retaining portion becomes smaller than the width of the protective target, Remains in a state of surrounding the protection object and is difficult to come off from the protection object. As a result, the protective cover can protect the object to be protected more reliably.

  Further, in the protective cover according to the present invention, the body portion includes a plurality of tube portions and a membrane portion that connects the tube portions, and an injection chamber capable of injecting gas is formed in the tube portion, and the shape retaining portion is formed. It is also possible to adopt a configuration in which a plurality of cylindrical portions are formed integrally with the cylindrical portion in a state where the cylindrical portions are arranged along the longitudinal direction of the shape retaining portion.

  According to such a configuration, when the shape retaining portion is expanded and contracted by configuring the body portion with a plurality of tube portions and a membrane portion that connects the tube portions, the body portion is deformed by the shape retention portion. It can be deformed accordingly. Therefore, the shape retaining portion can be easily expanded / contracted without receiving the resistance of the body portion. Furthermore, since an injection chamber for injecting gas into the cylinder part is provided, for example, when an indirect live wire work tool such as an operating rod comes into contact with the body part during indirect live wire work, the impact is absorbed, This makes it possible to prevent damage to the protected object.

  Moreover, in the protective cover which concerns on this invention, the structure by which the connection means for connecting a some cover main body is provided in the outer surface of a shape-retaining part is employable.

  According to this structure, it can respond to the protection target object from which length differs by connecting a some cover main body.

  According to the present invention, it is possible to reliably protect an object to be protected without using a clip, and it is possible to smoothly perform a live-line operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 4 show a first embodiment of a protective cover. The protective cover is, for example, for protecting by covering an object to be protected such as an electric wire, a lever, a brace, or the like in order to prevent a ground fault or damage during a hot wire operation. This protective cover has a cover body 1 that encloses and surrounds an object to be protected. The cover body 1 is made of an insulating material, and a part of the cover body 1 is formed in an open shape (hereinafter, this portion is referred to as an “open portion 2”) so that the object to be protected can be engaged inside. Has been. The cover body 1 includes a body portion 3 provided so as to surround the protection target object, and a shape retaining portion 4 provided integrally with each end portion of the body portion 3.

  The trunk | drum 3 is provided with the some cylindrical cylinder part 5 and the film | membrane part 6 which has the flexibility which connects the cylinder parts 5 and 5 mutually. An injection chamber (hereinafter referred to as “first injection chamber”) 10 into which gas (for example, air) can be injected is formed in the cylinder portion 5. On the other hand, the shape retaining portion 4 is formed in a long shape so that the end portions 4a and 4b approach each other. More specifically, the shape retaining portion 4 is formed in an arc shape or a C shape as shown in FIG. The shape retaining portion 4 is provided at each end portion (two places) of the body portion 3, and the two shape retaining portions 4 and 4 are disposed to face each other in the longitudinal direction of the body portion 3.

  Hereinafter, the surfaces facing each other in the two shape retaining portions 4 are referred to as opposing inner surfaces 11, and the surface opposite to the opposing inner surface 11 in each shape retaining portion 4 is referred to as the outer surface 12. Further, in each shape retaining portion 4, a surface connecting the opposed inner surface 11 and the outer surface 12 is referred to as a side surface, and in particular, a side surface located outside the cover body 1 is referred to as an outer surface 13.

  The body portion 3 is formed between the two shape retaining portions 4, 4, and an end portion thereof is formed integrally with the opposed inner surface 11 of the shape retaining portion 4, and a plurality of cylindrical portions 5 constituting the body portion 3. Are arranged at predetermined intervals along the circumferential direction of the shape retaining portion 4. The film part 6 that connects the cylinder parts 5 and 5 has the same length as the length of the cylinder part 5, and each end part in the longitudinal direction of the film part 6, together with the end parts of the cylinder parts 5,. It is formed integrally with the opposed inner surface 11 of the shape retaining portion 4.

  Moreover, the trunk | drum 3 is comprised along the circumferential direction of the shape-retaining part 4, and as shown in FIG. With this configuration, the cover body 1 is configured such that the body 3 surrounds the protection object when the object to be protected is engaged inside, and the shape retaining part 4 is protected by the body 3. The body part 3 is shaped so that the surrounding state surrounding the object can be maintained.

  The shape retaining portion 4 is formed in a hollow shape, and an injection chamber (hereinafter referred to as “second injection chamber”) 15 into which a gas can be injected is formed. An inlet 16 for injecting gas into the second injection chamber 15 is provided on the outer surface 12 of the shape retaining portion 4. Further, the cover main body 1 has the first injection chamber 10 and the second injection chamber 15 communicated (connected) so that the gas injected from the injection port 16 of the shape retaining portion 4 enters the first injection chamber 10. Is formed.

  The injection port 16 of the shape retaining portion 4 is provided with a check valve, and the cover body 1 can maintain a predetermined shape by injecting a predetermined amount of gas from the injection port 16. . The inlet 16 can discharge the gas in the cover main body 1 when a predetermined pressure is applied to the cover main body 1. For example, the cover main body 1 is strongly pressed from the outside by pressing the cover main body 1 from the outside. The gas inside 1 can be discharged. The body portion 3 and the shape retaining portion 4 of the cover main body 1 are constituted by a contractible film member, and when the gas in the cover main body 1 is discharged, the size of the cover main body 1 can be contracted to reduce its size.

  As shown in FIG. 1, a hook-and-loop fastener 20 is provided on the outer surface 12 of each shape retaining portion 4 as a connecting means for connecting a plurality of cover main bodies 1. The cover body 1 is provided with a male hook-and-loop fastener 20 on one outer surface 12 of the two shape retaining portions 4 and a female hook-and-loop fastener 20 on the other shape retaining portion 4. Thereby, the protective cover can connect a plurality of cover main bodies 1,.

  In addition, an insulating sheet member 22 can be attached to the outer surface 13 of the shape retaining portion 4. As shown in FIGS. 1 and 2, a hook-and-loop fastener 23 is provided on the outer surface 13 of the shape retaining portion 4 as an attaching means for attaching the sheet member 22. The sheet member 22 is provided with a hook-and-loop fastener that is locked to a hook-and-loop fastener 23 provided on the outer side surface 13 of the shape retaining portion 4. Thereby, the cover main body 1 can attach the sheet | seat member 22 to the outer side surface 13 of the shape-retaining part 4 so that attachment or detachment is possible.

  As shown in FIGS. 1 and 3, the shape retaining portion 4 has its end portions 4a and 4b spaced apart from each other at a predetermined interval so that a part of the cover body 1 is configured to be open. The distance between the end portions 4 a and 4 b of the shape retaining portion 4 is smaller than the inner diameter of the shape retaining portion 4. Moreover, the space | interval of edge part 4a, 4b of this shape-retaining part 4 is set smaller than the width | variety of a protection target object. The shape retaining portion 4 is configured to be freely expandable and contractible so that a protection object can pass between the end portions 4a and 4b. That is, as shown by a two-dot chain line in FIG. 3, the shape retaining portion 4 is deformed so that the interval between the end portions 4 a and 4 b is increased when the end portions 4 a and 4 b are spread. Therefore, the shape retaining portion 4 is configured such that the distance between the end portions 4a and 4b is increased so that the object to be protected can pass therethrough.

  The cover body 1 is provided with a lid portion 26 for closing the open portion 2. The lid portion 26 is formed in a sheet shape, and one end portion thereof is integrally provided on the cylindrical portion 5 positioned in the immediate vicinity of the one end portion 4 a of the shape retaining portion 4. A hook-and-loop fastener 28 is provided on the other end side of the lid portion 26 as a fixing means for fixing the lid portion 26 in a state where the open portion 2 of the cover body 1 is closed. A hook-and-loop fastener 29 that is locked to the hook-and-loop fastener 28 of the lid portion 26 is provided on the outer surface 12 of the cylindrical portion 5 and the membrane portion 6 that are positioned on the other end portion 4 b side of the shape retaining portion 4. One of the hook-and-loop fasteners 28 of the lid part 26 and the hook-and-loop fasteners 29 provided on the tube part 5 and the film part 6 is male and the other is female. The cover body 1 can close the open portion 2 by fixing the hook-and-loop fastener 28 of the lid portion 26 in close contact with the hook-and-loop fastener 29 provided on the cylinder portion 5 or the membrane portion 6.

  Hereinafter, the method of using the protective cover during indirect hot-line work will be described. FIG. 4 shows a part of an aerial electrical line in which a protective cover is used. As shown in FIG. 4, an arm metal 32 is provided on the upper portion of the electric pole 31 so as to intersect the electric pole 31, and the electric wire is supported by the pin insulator 33, the tension-resistant insulator 34, It is installed between the utility poles 31 via clamps 35.

  The indirect hot wire operation is performed by, for example, connecting an edge line 36 spanned from one tension insulator 34 supported by the arm metal 32 through the pin insulator 33 to the other tension insulator 34 to an indirect live line such as an operating rod. Disconnect and reconnect using a working tool. In this case, the protective cover is put on, for example, a pin insulator 33 or a tension insulator 34 which is one of the objects to be protected. In FIG. 4, the protective cover is expressed only to be used for one tension insulator 34, but actually, a plurality of locations such as the pin insulator 33 and the tension insulators 34 at other locations are used. Used for.

  In order to protect an object to be protected using the protective cover, gas (for example, air) is injected from the injection port 16 into the first injection chamber 10 and the second injection chamber 15, and the protective cover is inflated to have a predetermined shape. Thereafter, the end portion 4a of the shape retaining portion 4 with an indirect hot wire work tool such as an operating rod so that the object to be protected can be engaged inside the cover body 1 from the open portion 2 of the cover body 1. Grab 4b and spread.

  Then, when the object to be protected is passed between the end portions 4 a and 4 b of the shape retaining portion 4 and the object to be protected enters inside the cover body 1, the work tool for indirect hot-line holding the shape retaining portion 4 is used. Release. If it does so, the shape-retaining part 4 extended to the work tool for indirect hot lines will return to the original shape. When the shape retaining portion 4 returns to its original shape, the distance between the end portions 4a and 4b of the shape retaining portion 4 becomes smaller than the width of the protection target object, whereby the cover body 1 is not easily detached from the protection target object. Become.

  When an object to be protected enters inside the cover body 1, the open portion 2 of the cover body 1 is closed by the lid portion 26. As a result, the protective cover can be protected by surrounding the entire circumference of the object to be protected with the body portion 3 and the lid portion 26 of the cover body 1.

  In this state, when the indirect hot-line work is performed and the work is completed, the cover 26 that has blocked the open portion 2 of the cover body 1 is removed from the protective cover, and the shape retaining part 4 is removed by the indirect live-line work tool. The space | interval of edge part 4a, 4b is expanded, and it removes from a protection target object. Then, the cover body 1 is strongly pressed from the outside, and the gas in the first injection chamber 10 and the second injection chamber 15 is discharged from the injection port 16. When the gas in the first injection chamber 10 and the second injection chamber 15 is exhausted from the injection port 16, the protective cover contracts slightly and is stored in a predetermined storage location in this state.

  According to the protective cover having the above-described configuration, the shape retaining portion 4 of the cover body 1 is retained so that the trunk portion 3 can maintain the state of surrounding the object to be protected. When the object is engaged, the body part 3 always surrounds the object to be protected, so that the protective cover can reliably protect the object to be protected without using a clip, and the live line work can be performed smoothly. be able to.

  In addition, by forming the injection chambers 10 and 15 in the body part 3 and the shape retaining part 4 and filling the gas, for example, when the indirect live wire work tool comes into contact with the body part 3 or the like during the indirect live wire work. The impact can be absorbed, thereby preventing damage to the protected object.

  Furthermore, since the first injection chamber 10 of the body portion 3 and the second injection chamber 15 of the shape retaining portion 4 are formed in communication with each other, by injecting gas from the injection port 16 of the shape retaining portion 4, Both the first injection chamber 10 and the second injection chamber 15 can be filled with gas. Therefore, the operation of injecting gas into the first injection chamber 10 and the second injection chamber 15 can be easily performed.

  In addition, the shape retaining portion 4 is configured to be freely expandable and contractible, and the interval between the end portions 4a and 4b of the shape retaining portion 4 is made smaller than the width of the object to be protected, so that the cover body 1 can be protected inside. When the object is engaged, the object to be protected is gripped and is difficult to come off from the object to be protected. Therefore, the protective cover can reliably protect the protective object without leaving the protective object during the hot line operation.

  The barrel portion 3 is formed by arranging the cylindrical portions 5 along the circumferential direction of the shape retaining portion 4 and integrally forming a flexible film portion 6 between the cylindrical portions 5 and 5. Since it is constituted by connecting 5 to each other, the film portion 6 of the body portion 3 is easily deformed in accordance with the deformation of the shape retaining portion 4 when the shape retaining portion 4 is enlarged or reduced. Therefore, the protective cover is less susceptible to the resistance of the body portion 3 when the shape retaining portion 4 is expanded or contracted, and the object to be protected can be easily engaged inside the cover main body 1.

  Further, since the plurality of cover main bodies 1 can be connected by the connecting means (surface fastener 20), the protective cover can be used corresponding to the difference in length even when the length of the object to be protected is different. is there.

  FIG. 5 shows a second embodiment of the protective cover.

  In 1st Embodiment mentioned above, although the trunk | drum 3 showed the protective cover provided with the several cylinder parts 5, ... and the film | membrane part 6 which connects the cylinder parts 5,5, in this 2nd Embodiment, the trunk | drum was shown. The portion 3 is formed integrally with the arc-shaped shape retaining portion 4, and is formed in a C shape in a plan view or an arc-shaped cylindrical shape formed along the circumferential direction of the shape retaining portion 4. An injection chamber capable of injecting gas is formed inside the body portion 3.

  The shape retaining portion 4 is formed in an arc shape or a C-shaped plate shape by an insulating material such as a synthetic resin, for example, and is fixed to an end portion of the body portion 3 so that the body portion 3 surrounds an object to be protected. The shape is maintained so that the surrounding state can be maintained. The shape retaining portion 4 is formed so as to be elastically deformable, and can be expanded and contracted so that the interval between the end portions 4a and 4b can be changed.

  Also in the protective cover according to the second embodiment, as in the first embodiment, the protective object is engaged inside the cover main body 1 and the open portion 2 is closed by the lid portion 26 so that the entire protective object is covered. It can be protected by surrounding it. In addition, the same code | symbol is attached | subjected to the part which 2nd Embodiment shares with 1st Embodiment.

  The present invention is not limited to the above embodiment, and various modifications and changes can be made.

  In the above embodiment, an example in which the shape retaining portion 4 is formed in an arc shape has been shown. Various shapes can be employed. The “arc” according to the shape retaining portion 4 is not limited to a geometric meaning, but is a concept including a curved shape.

  For example, in the above-described embodiment, an example in which the injection port 16 is provided in the shape retaining portion 4 of the cover body 1 is shown. However, the present invention is not limited thereto, and the injection port 16 may be provided in the body portion 3. The injection port 16 may be provided in both the shape retaining portion 4 and the body portion 3.

  In the above embodiment, an example in which the shape retaining portion 4 is provided at each end of the trunk portion 3 is shown. However, the shape retaining portion 4 is not limited to this, and the shape retaining portion 4 is formed only at one end portion of the trunk portion 3. May be. That is, the shape retaining portion 4 only needs to be provided at least at one end of the body portion 3.

  Protective objects protected by the protective cover are all those requiring damage prevention and insulation. The protective cover can protect cutouts, clamps 35 and other various devices (protective objects).

  In the above embodiment, the hook-and-loop fasteners 20, 23, 28, and 29 are used as connecting means for connecting the plurality of cover main bodies 1, attaching means for attaching the sheet member 22 to the cover main body 1, and fixing means for fixing the lid portion 26. Although it used, it is not restricted to this, An adhesive tape, a magnet, a hook member, and other various means can be used.

  In the above embodiment, the barrel portion 3 is configured by the cylindrical portion 5 and the film portion 6, and the cylindrical portion 5 and the film portion 6 are integrally formed on the opposed inner surface 11 of the shape retaining portion 4. However, the present invention is not limited to this, and the film part 6 may be formed shorter than the length of the cylindrical part 5 in the longitudinal direction, and only the cylindrical part 5 may be integrally formed on the opposing inner surface 11 of the shape retaining part 4.

It is a perspective view of the protective cover which concerns on 1st Embodiment of this invention. It is the outer side view of a protective cover similarly. It is the sectional view on the AA line of FIG. It is a perspective view which shows the state which the protection cover is protecting the protection target object. It is a perspective view of the protective cover which concerns on 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cover main body, 2 ... Opening part, 3 ... Body part, 4 ... Shape retention part, 4a ... End part of shape retention part, 4b ... End part of shape retention part, 5 ... Tube part, 6 ... Membrane part, 10 ... injection chamber (first injection chamber) in the trunk, 15 ... injection chamber (second injection chamber) in the shape retaining part, 16 ... injection port, 20 ... connecting means

Claims (4)

A protective cover for protecting an object to be protected when performing live line work on an overhead distribution line,
Some order to surrounds the inside is engaged protection object with composed of an insulating material e Bei the cover body configured to open shape,
The cover body is provided with a body having a shape surrounding the protection target object, and is provided at least at one end of the body part, and the body retains the shape of the body so as to maintain the surrounding state in which the body surrounds the protection target object. And the body part and the shape-retaining part each have injection chambers that can inject gas and communicate with each other, and at least one of the body part and the shape-retaining part is an inlet for injecting gas into the injection chamber. A protective cover characterized by comprising.   The shape-retaining portion is formed in a long shape so that the end portions are close to each other, and the end portions are spaced apart from each other at a predetermined interval so that a part of the cover body is open. The protective cover according to claim 1, wherein the protective cover is configured to be expandable / contractable so that an object to be protected that is larger than an interval between the ends of the shape retaining portion is allowed to pass.   The barrel portion includes a plurality of cylindrical portions and a membrane portion that connects the cylindrical portions, and an injection chamber capable of injecting gas is formed in the cylindrical portion, and the shape retaining portion includes a plurality of cylindrical shape retaining portions. The protective cover according to claim 2, wherein the protective cover is formed integrally with the cylindrical portion in a state of being arranged along the longitudinal direction.   The protective cover according to any one of claims 1 to 3, wherein a connecting means for connecting a plurality of cover main bodies is provided on an outer surface of the shape retaining portion.

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