JP4845583B2 - Protective equipment - Google Patents

Description

  The present invention relates to a structure of a protective device that covers an end portion of a predetermined member such as an electric wire or a driver, for example, and performs an insulation process or protects a user from an injury or the like.

  In order to insulate the end portion of the electric wire, an invention for extrapolating the end portion of the electric wire with a bottomed tubular electric wire end treatment cap instead of winding with an insulating tape is already known (for example, a patent See references 1 to 3.)

Regarding a tool with a relatively sharp tip of a bit such as a screwdriver, the invention of a pen-type screwdriver that protects the user of the tool from injury etc. by covering the bit with a cap when the tool is not in use is already known. (For example, refer to Patent Document 4).
JP-A-8-103018 JP-A-8-098381 JP-A-9-009477 JP 2002-239938 A

  However, in Patent Documents 1 to 3, when an electric wire is reconnected to an electric facility or the like, and when the electric wire is removed from the electric facility or the like due to the abolition of the electric facility or the like, an operator's hand is placed on the conductive portion. Where a finger or the like may come into contact and an arc may be generated, the caps described in Patent Documents 1 to 3 are already removed and the insulation treatment is released, and thus cannot contribute to worker safety. . Moreover, there is a possibility that the cap may be accidentally dropped when the cap is extrapolated to the end portion of the electric wire. This possibility becomes greater when an instrument such as an insulating Yatco is used as the indirect hot wire method. Furthermore, a large number of caps with different inner diameters must be prepared according to the thickness of the outer diameter of the electric wire, resulting in a problem that the manufacturing cost of the cap is high.

  Also in the above-mentioned Patent Document 4, there is a possibility that the cap is accidentally dropped when attaching and removing the cap to the driver bit. A large number of caps with different inner diameters must be prepared in accordance with the diameter of the driver bit, resulting in a high manufacturing cost of the cap and thus the pen-type driver.

  Therefore, the present invention avoids the work of attaching and detaching the protector to the end of the predetermined member on the site, improves the safety of the user, and attaches even if the outer diameter of the protected object varies. It is an object to provide a protective device that is highly versatile as possible.

The protective device according to the present invention is configured such that the side circumferential surface of the linear first member is covered with the second member, and the end portion of the first member protrudes from the second member in the axial direction. A protective device that is fixed to the protected body, the fixing device being attachable to a side circumferential surface of the second member, and the second member extending from the fixing device along the axial direction of the second member. And a cover that extends toward the end of the first member and expands and contracts along the axial direction of the second member, and the fixing member extends the side circumferential surface of the second member with the first member. The cover is fixed by tightening toward the member side, and the cover covers all of the end of the first member when extended most, and the end of the first member is exposed when contracted most. while, the covering body is a cylindrical body, the side peripheral surface is inclined in a direction away from said second member A first inclined portion; a second inclined portion inclined in a direction approaching the second member; and a bent portion formed at a boundary between the first inclined portion and the second inclined portion. However, the first inclined portion, the second inclined portion, and the bent portion are each formed into a single shape (claim 1). In the protective device according to the present invention, the side circumferential surface of the linear first member is covered with the second member, and the end of the first member protrudes from the second member in the axial direction. And a fixture that can be attached to a side peripheral surface of the second member, and an axial direction of the second member from the fixture. The cover is configured to extend toward the end of the first member and expand and contract along the axial direction of the second member, and the fixing member extends the side peripheral surface of the second member with the first member. The cover is fixed by being tightened toward the first member side, and the cover covers all of the end of the first member when extended most, and the end of the first member when contracted most Is exposed, and the cover is a cylindrical body, and its side circumferential surface is in a direction away from the second member. An inclined first inclined portion, a second inclined portion inclined in a direction approaching the second member, and a bent portion formed at a boundary between the first inclined portion and the second inclined portion; And the first inclined portion, the second inclined portion, and the bent portion are repeated over a plurality of times to form a bellows shape composed of a peak portion and a valley portion (Claim 2). ). When the protected body is, for example, a cable for electric wires, the first member is a conductive member such as a copper wire, and the second member is an insulating member such as an insulating cover. When the object to be protected is a driver, for example, the first member is a driver bit made of stainless steel, carbon steel or the like, and the second member is a grip made of wood, plastic or the like. The cover body has a restoring force up to a position where the cover member extends to the maximum when the cover member is pressed in the axial direction of the first member and contracts, for example.

Furthermore, the protective device according to the present invention covers the lateral peripheral surface of the linear first member with the second member, and the end portion of the first member protrudes from the second member in the axial direction. And a fixture that can be attached to a side peripheral surface of the second member, and an axial direction of the second member from the fixture. The cover is configured to extend toward the end of the first member and expand and contract along the axial direction of the second member, and the fixing member extends the side peripheral surface of the second member with the first member. The cover is fixed by being tightened toward the first member side, and the cover covers all of the end of the first member when extended most, and the end of the first member when contracted most The cover is composed of a flexible rod-shaped portion and a spherical portion formed at the tip of the rod-shaped member. A bending member, is characterized in that it has been configured by disposing around said second member (claim 3). When the protected body is, for example, a cable for electric wires, the first member is a conductive member such as a copper wire, and the second member is an insulating member such as an insulating cover. When the object to be protected is a driver, for example, the first member is a driver bit made of stainless steel, carbon steel or the like, and the second member is a grip made of wood, plastic or the like. The cover body has a restoring force up to a position where the cover member extends to the maximum when the cover member is pressed in the axial direction of the first member and contracts, for example.

Thus, when the cable is inserted into the electrical equipment or the like, the cover contracts in accordance with the insertion ratio of the first member, and when the cable is extracted from the electrical equipment or the like, the extraction ratio of the first member is set. In response, the covering extends. Further, since the protective device may be always fixed to the protected body, there is no need to attach or remove it during the work. Moreover, by setting it as such a structure, a cover body can be expanded-contracted along the axial direction of a 1st and 2nd member.

  The fixture is constituted by an annular elastic member (claim 4). In addition, the fixture is formed of a belt-like member and is formed in an annular shape by joining ends of the belt-like member through a joining means (Claim 5). Thereby, a protective instrument can be reliably fixed to the side peripheral surface of a 2nd member, without being influenced by the radial dimension of a 2nd member.

  According to the first to fifth aspects of the present invention, when the protected body is connected to or reconnected to another device or the like, the covering body contracts according to the insertion ratio of the first member, and the protected body Since the cover extends in accordance with the extraction ratio of the first member when the connector is extracted from the connected state with other devices, the portion outside the first member is always covered with the cover. Insulated state. For this reason, even if the first member is a conductive member, there is no possibility that the user will come into contact with the end portion of the first member to generate an arc, and work safety can be achieved. Further, since the end portion is hidden when not in use, there is no risk of injury to the user even if the end portion has a relatively sharp shape.

  Further, according to the invention described in claims 1 to 5, since the protective device may be always fixed to the body to be protected, there is no need to attach or remove it at the work site. It is possible to avoid a problem that the protective device is accidentally dropped from the object to be protected.

  In particular, according to the third aspect of the present invention, since the tip of the rod-shaped member is a spherical portion, the rod-shaped member of the protective device is also attached when the end of the first member of the protected body is inserted into another device. Can be prevented from being inserted in

  In particular, according to the invention described in claims 4 and 5, the protective device is not affected by the outer diameter of the second member, and is attached to the side peripheral surface of the second member via a fixture. Since it can be securely fixed, there is no need to prepare a protective device for each second member with a different outer diameter, it can be handled with a single protective device, and it is highly versatile. The manufacturing cost of the instrument can be suppressed.

  The best mode of the embodiment of the present invention will be described below with reference to the drawings.

  1 and 2 show a first embodiment of a protective device 1 according to the present invention. The protective device 1 has an insulating property, and includes a fixture 2 and a cover 3.

  Among these, the fixture 2 is comprised by the cyclic | annular elastic member (for example, rubber | gum etc.), and can be expanded-contracted along the radial direction. The inner diameter dimension of the fixture 2 is smaller than the outer diameter dimension of the second member 10 of the protected body 8 described below.

  The cover 3 is a cylindrical body that integrally extends with the fixture 2 from one side in the axial direction of the fixture 2, and the side surface thereof is the axial direction of the cover 3 in this embodiment. The first inclined portion 4 that inclines so as to expand toward the outside in the radial direction as it proceeds to, and the second inclination that inclines toward the inside in the radial direction as it proceeds in the axial direction of the cover 3. Has a part.

  And the cover 3 has the bending part 6 in the boundary of the 1st inclination part 4 and the 2nd inclination part 5 by each single-piece | unit. When the axial force is applied to the cover 3, the bent portion 6 is bent so as to protrude outward in the radial direction of the cover 3, thereby reducing the dimension along the axial direction of the cover 3. When the axial force on the cover 3 is released, the structure can be restored to the original state.

  The axial dimension of the cover 3 in the reduced state is the same as or slightly larger than the axial dimension of the end 9A of the protected body 8 described below. Further, the axial dimension of the cover 3 in the contracted state is smaller than the axial dimension of the end portion 9A of the protected body 8 described below, and the larger the dimensional difference in that case, the better. Further, in this embodiment, the inner diameter dimension of the opening 7 on the reduced diameter section 5 side of the cover 3 is substantially equal to the outer diameter dimension of the first member 9 of the protected body 8 described below. However, the outer diameter of the first member 9 of the protected body 8 may be slightly larger.

  The protected body 8 is a cable for electric wires in this embodiment. In this case, the first member 9 is a conductive member such as a copper wire, and the second member 10 is a first member, for example. An insulating member such as an insulating cover that covers the side circumferential surface of the member 9. The first member 9 protrudes in the axial direction from the end of the second member 10, and an end portion 9 </ b> A serving as a terminal portion thereof is formed. It is exposed to the outside.

  With this configuration, when the protective device 1 is attached to the protected body 8, the fixing device 2 is slightly expanded and extrapolated to the vicinity of the end 9A of the second member 10 to thereby fix the fixing device 2. Since the second member 10 of the protected body 8 is fastened to the first member 9 side along the radial direction, the protective device 1 is securely attached to the second member of the protected body 8. Moreover, by setting the inner diameter dimension of the fixture 2 to be always smaller than the outer diameter dimension of the second member 10, even if the outer diameter dimension of the second member 10 of the protected body 8 varies, The protective device 1 can be mounted on the second member 10 of the protected body 8 without being affected.

  Further, as shown in FIG. 2A, the first member 9 of the protected body 8 is covered with the cover 3 before or after being connected to the device 25 such as a connector or an electrical facility. In addition, the object to be protected 8 is subjected to insulation treatment, and even if the electric wire is energized in the work in the hot wire method but not connected to the device 25, the operator mistakenly ends the end of the first member 9. It is possible to prevent the arc from coming into contact with 9A.

  Then, as shown in FIG. 2B, when connecting and reconnecting the electric wire as the protected body 8 to the device 25 such as a connector or an electric facility, the device 25 at the end 9A of the first member 9 is used. When the cover 3 contracts along the axial direction in accordance with the insertion ratio to the device and the protected body 8 is extracted from the connected state with the device 25, the extraction ratio of the end 9A of the first member 9 is extracted. Accordingly, the cover 3 extends along the axial direction, so that the portion outside the device 25 of the end 9A of the first member 9 is always covered with the cover 3 and insulated, even during work. It has become. For this reason, there is no possibility that the user may contact the end portion 9A of the first member 9 to generate an arc even during work, and the work safety can be improved.

  The protected body 8 may be a tool driver (not shown). In this case, the first member 9 is a driver bit made of stainless steel, carbon steel or the like, and the end 9A is a relative of the driver bit. The second member 10 having a sharp tip is a grip made of wood, plastic or the like. Even in this case, when not in use, the end 9A, which is the portion having the tip of the driver bit, is covered with the cover 3, so that the user can be prevented from accidentally touching the tip of the driver bit. Can do. The same applies to Example 2 and Example 3 described later.

  FIG. 3 shows a second embodiment of the protective device 1 according to the present invention. This protective device 1 has an insulating property, and is constituted by a fixture 2 and a cover 3, and the fixture 2 is constituted by an annular elastic member that can expand and contract along the radial direction. The inner diameter dimension is the same as that of the first embodiment in that the outer diameter dimension of the second member 10 of the protected body 8 is smaller. Therefore, the cover 3 is demonstrated below based on drawing. However, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The cover 3 forms a cylindrical body as a whole, but its side peripheral surface has a bellows shape in which a peak portion 11 and a valley portion 12 are continuously formed. The peak portion 11 is composed of a combination of a first inclined portion 4, a second inclined portion 5, and a bent portion 6 formed at the boundary thereof and bent so as to protrude outward in the radial direction of the cover 3. Yes. Moreover, the trough part 12 is comprised by the combination of the 2nd inclination part 5, the 1st inclination part 4, and the bending part 13 which is formed in the boundary and bends so that it may protrude in the radial direction inner side of the cover 3 Has been. Therefore, the side peripheral surface of the cover 3 repeats the 1st inclination part 4, the 2nd inclination part 5, and the bending parts 6 and 13 in multiple numbers.

  In the second embodiment, the inner diameter of the opening 7 on the reduced diameter portion 5 side of the cover 3 is slightly larger than the outer diameter of the first member 9 of the protected body 8, but this is not necessarily the case. However, the outer diameter of the first member 9 of the protected body 8 may be substantially equal.

  By adopting such a configuration, the fixing device 2 can obtain the same operational effects as those of the first embodiment, and at the same time, the cover 3 shown in the second embodiment is also shown in FIG. Thus, since the electric wire as the protected body 8 can be covered with the cover 3 before or after being connected, it is insulated, and the electric wire is in the energized state in the work in the hot wire method. It is possible to prevent an operator from accidentally coming into contact with the end portion 9A of the first member 9 and generating an arc even when not connected to equipment or the like.

  Then, as shown in FIG. 3B, when connecting and reconnecting the electric wire as the protected body 8 to the device 25, according to the insertion ratio of the end portion 9A of the first member 9 into the device 25. When the cover 3 contracts along the axial direction and the protected body 8 is extracted from the connected state with the device 25, the cover 3 is selected according to the extraction ratio of the end 9A of the first member 9. Is extended along the axial direction, so that the portion of the end portion 9A of the first member 9 outside the device 25 is always covered with the cover 3 even during work, and the end portion 9A of the first member 9 is insulated. It is a state that has been applied. For this reason, there is no possibility that the user may contact the end portion 9A of the first member 9 to generate an arc even during work, and the work safety can be improved.

  4 and 5 show a third embodiment of the protective device 1 according to the present invention. The protective device 1 is insulative and is common in that the fixture 2 and the cover 3 are configured. However, the configurations of the fixture 2 and the cover 3 are greatly different from those of the previous embodiments. ing. The third embodiment will be described below with reference to the drawings.

  As shown in FIG. 4, the fixing device 2 is a slender strip having flexibility, and can be bent in an annular shape. In this embodiment, the end portions are joined to both end portions in the longitudinal direction. It has the junction parts 16 and 17 for doing. For example, one of the joining portions 16 and 17 is a male surface fastener, and the other is a female surface fastener, and the joining range between the joining portions 16 and 17 can be varied along the longitudinal direction thereof. It is possible to adjust the inner diameter of the annular body formed by 2.

  The cover 3 includes a plurality of bending members 15 including a flexible rod-shaped member 15A and a spherical portion 15B formed at the tip of the rod-shaped member 15A.

  With such a configuration, when the protective device 1 is attached to the protected body 8, the fixing device 2 is wound around the outer surface of the portion near the end 9A of the second member 10 so that the fixing device 2 is covered. Since the second member 10 of the protector 8 is tightened to the first member 9 side along the radial direction, the protective device 1 is securely attached to the second member of the protected body 8. In addition, even if the second member 10 of the protected body 8 varies, the joining position between the joint 16 and the joint 17 of the fixture 2 is simply shifted along the longitudinal direction of the fixture 2. Without being done, the protective device 1 can be mounted on the second member 10 of the protected body 8 without fail.

  Further, the rod-shaped member 15A of each bending member 15 is bent inward, and the spherical portion 15B located at the tip thereof is concentrated on the axial line with respect to the end portion 9A of the first member 9, thereby Since it is covered with the rod-shaped member 15A of the cover 3 before or after the connection of the electric wire as the protected body 8 shown in 5 (A), the end 9A of the first member 9 is insulated. In the operation in the hot wire method, the electric wire is energized, but the worker accidentally contacts the end 9A of the first member 9 even when it is not connected to the electrical equipment, etc., and an arc is generated. Can be prevented.

  Then, as shown in FIG. 5B, when connecting and reconnecting the electric wire as the protected body 8 to another device 25 such as a connector or an electrical facility, the end 9A of the first member 9 When the rod-shaped member 15A of the cover 3 bends according to the insertion ratio into the device 25 and the cover 3 contracts along the axial direction, The rod-shaped member 15A of the cover 3 is restored in accordance with the extraction ratio of the end 9A of the first member 9, and the cover 3 extends along the axial direction. Therefore, the end 9A of the first member 9 is also in operation. Is always covered by the cover 3 with the rod-like member 15A, so that the portion of the end portion 9A of the first member 9 outside the device 25 is always subjected to insulation treatment. For this reason, there is no possibility that the user may contact the end portion 9A of the first member 9 to generate an arc even during work, and the work safety can be improved.

  Further, since the spherical portion 15B is provided at the tip of the rod-shaped member 15A, the spherical portion 15B serves as a stopper when the protected body 8 is inserted into the device 25, and the rod-shaped member 15A is also the end portion 9A of the first member 9. Can be prevented from being inserted together.

FIG. 1 is a perspective view showing a configuration of a protective device according to Embodiment 1 of the present invention. FIG. 2 is a half cross-sectional view showing a state in which the protective device according to Example 1 is fixed to a protected body, and FIG. 2 (A) shows a state where the protected body is not connected to a device, etc. FIG. 2B shows a state in which the protected object is connected to a device or the like. FIG. 3 is a half cross-sectional view illustrating a state in which the protective device according to the second embodiment is fixed to the object to be protected, and FIG. 3A illustrates a state in which the object to be protected is not connected to the device. (B) shows a state in which the protected body is connected to a device or the like. 4 is a half cross-sectional view showing a state in which the protective device according to the third embodiment is fixed to a protected body, and FIG. 4 (A) shows a state where the protected body is not connected to a device or the like. (B) shows a state in which the protected body is connected to a device or the like. FIG. 5 is a perspective view showing the configuration of the protective device according to Embodiment 3 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Protective instrument 2 Fixing tool 3 Cover body 4 1st inclination part 5 2nd inclination part 6 Bending part 8 Protected body 9 1st member 9A End part 10 2nd member 11 Mountain part 12 Valley part 13 Bending part DESCRIPTION OF SYMBOLS 15 Bending member 15A Bar-shaped member 15B Spherical part 16 Joining part 17 Joining part 25 Other apparatus

Claims (5)

The side circumferential surface of the linear first member is covered with the second member, and the end portion of the first member is fixed to a protected body configured to protrude from the second member in the axial direction. Protective equipment
A fixture that can be attached to a side peripheral surface of the second member, and the second member that extends from the fixture to the end side of the first member along the axial direction of the second member. And a cover that can expand and contract along the axial direction of
The fixing member is fixed by tightening the side peripheral surface of the second member toward the first member, and when the cover is extended most, all the end portions of the first member are fixed. When the most contracted, the end of the first member is exposed ,
The cover is a cylindrical body, and a side circumferential surface thereof has a first inclined portion inclined in a direction away from the second member, and a second inclined in a direction approaching the second member. An inclined portion, and a bent portion formed at a boundary between the first inclined portion and the second inclined portion, and each of the first inclined portion, the second inclined portion, and the bent portion is a single unit. A protective device characterized by having a shape formed of The side circumferential surface of the linear first member is covered with the second member, and the end portion of the first member is fixed to a protected body configured to protrude from the second member in the axial direction. Protective equipment
A fixture that can be attached to a side peripheral surface of the second member, and the second member that extends from the fixture to the end side of the first member along the axial direction of the second member. And a cover that can expand and contract along the axial direction of
The fixing member is fixed by tightening the side peripheral surface of the second member toward the first member, and when the cover is extended most, all the end portions of the first member are fixed. When the most contracted, the end of the first member is exposed,
The cover is a cylindrical body, and a side circumferential surface thereof has a first inclined portion inclined in a direction away from the second member, and a second inclined in a direction approaching the second member. An inclined portion, and a bent portion formed at a boundary between the first inclined portion and the second inclined portion, and a plurality of the first inclined portion, the second inclined portion, and the bent portion are provided. A protective device characterized by having a bellows shape consisting of a peak and a valley by repetition . The side circumferential surface of the linear first member is covered with the second member, and the end portion of the first member is fixed to a protected body configured to protrude from the second member in the axial direction. Protective equipment
A fixture that can be attached to a side peripheral surface of the second member, and the second member that extends from the fixture to the end side of the first member along the axial direction of the second member. And a cover that can expand and contract along the axial direction of
The fixing member is fixed by tightening the side peripheral surface of the second member toward the first member, and when the cover is extended most, all the end portions of the first member are fixed. When the most contracted, the end of the first member is exposed,
The cover is configured by arranging a bending member composed of a flexible rod-shaped portion and a spherical portion formed at the tip of the rod-shaped member around the second member. Protective equipment to do.   The said fixture is comprised by the cyclic | annular elastic member, The protection instrument in any one of Claim 1 to 3 characterized by the above-mentioned.   The said fixing tool is comprised by a strip | belt-shaped member, and is formed in cyclic | annular form by joining the edge parts of this strip | belt-shaped member through a joining means. The protective device described.

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