JP2008289327A - Protective device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the work and shorten the work time by removing a protective device easily from the terminal of a wire, and to provide a safe work environment for a worker by bringing the terminal of a wire close to an apparatus to which the terminal of a wire is connected, thereby preventing occurrence of short-circuit or ground fault in the connection work. <P>SOLUTION: The terminal 51 of a wire previously coated with a protective device 1 is brought close to the side of an apparatus 52 such as a watthour meter to which the terminal of a wire is connected. Immediately before the terminal 51 of a wire can be connected with the apparatus 52, a cover portion 2 is opened by operating the grips 9 and 10 for the cover portion 2, the terminal 51 of a wire is exposed to the outside and connected with the apparatus 52, and then an attaching portion 3 is opened by operating the grips 19 and 20 for the attaching portion 3 so that the attaching portion 3 and the cover portion 2 connected therewith can be removed from the wire 50. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  For example, the present invention handles and terminates the terminal of the electric wire when the electric wire connected to the terminal of a meter such as a low-voltage electric wire or a watt hour meter installed between utility poles is not connected to the device to be connected. The present invention relates to a protective device for protecting a person who performs wire work.

  In the hot-wire work such as installing a low-voltage electric wire between utility poles, in order to insulate the terminal of the electric wire in an energized state, an invention for covering the terminal of the electric wire with a bottomed cylindrical electric wire terminal processing cap is already known (For example, see Patent Document 1).

  In addition, a bottomed cylindrical cap such as a terminal cap that covers the end of the wire is already known for waterproofing the end of the covered wire during storage (see, for example, Patent Document 2).

Further, when the power contract is abolished and the power supply is stopped, conventionally, as shown in FIG. 7, after the wires 102 to 107 are removed from the terminal holes of the terminal portion 101 of the watt hour meter 100, the patent The terminal of the removed electric wires 102 to 107 is simultaneously sealed with the cover and the like covering the terminal part and the terminal part so as to prevent the use of electricity without permission without using a sealing tool as shown in Reference 3. In addition, the bottomed cylindrical insulating caps 108 and 109 as shown in Patent Document 2 and the like are attached to perform insulation treatment.
JP-A-8-103018 JP-A-10-233134 JP 2006-65007 A

  However, since the cap shown in Patent Document 2 is removed by pulling in the direction opposite to the direction covered on the terminal, when the cap is firmly connected to the terminal of the electric wire, the cap is removed from the terminal of the electric wire. Takes a lot of labor, and the removal work becomes complicated and takes a long time. Moreover, in the removal work at a relatively high place, such as on a power pole or ladder, there is a risk that the cap will lose its position due to the reaction of the cap coming off from the end of the electric wire, and the end of the electric wire or the operator himself may fall. In particular, when the terminal of a dropped electric wire is in an energized state, there is a risk of causing an electric shock or a ground fault to a person.

  In addition, the caps shown in Patent Documents 1 and 2 are generally removed in advance before connecting to a predetermined device to be connected such as a terminal of a watt hour meter. As the terminal of the wire in the state is exposed, it will be brought close to the device to be connected, and the device to be connected is also energized, so a short circuit or ground fault may occur during connection work There is also a problem that there is a high possibility that danger to workers is high.

  Therefore, the present invention simplifies and shortens the operation by making it easy to remove from the end of the electric wire, and brings the end of the electric wire close to the device to be connected to which the end of the electric wire is connected. An object of the present invention is to provide a protective device capable of preventing a short circuit and a ground fault from being caused by connecting work and providing a safe working environment for the worker.

  In the protective device according to the present invention, a cover part for covering the end of the electric wire and an attachment part for attaching to the electric wire are connected along the axial direction of the electric wire, and the cover part is It has at least opening / closing means that can be opened in a direction away from an axis extending from the end of the electric wire, and the mounting portion has opening / closing means that can be opened so as to spread in the radial direction of the electric wire. (Claim 1). Here, the surface layer part and the inner layer part of the cover part and the mounting part are formed of an insulating material (for example, rubber).

  Among these, the said cover part consists of two members which become a bottomed cylindrical shape by combining from the radial direction of the said electric wire, and the said opening / closing means is an axial direction of the said electric wire among the joints of the said two members. One side of the two joints along the line is connected to be openable and closable along the radial direction of the electric wire, and the other side of the two joints along the axial direction of the electric wire is in contact with the two members. And a biasing force acting in the direction, and an operation unit that applies force in a direction in which the edges facing each other on the other side of the two joints along the axial direction of the electric wire are separated from each other against the biasing force. (Claim 2). As this operation part, for example, on one side of two joints along the axial direction of the electric wires of the two members, a grip part is provided at each edge facing the joint, and the grip parts are pushed close to each other. By this, the structure which gives a bigger force than the urging | biasing force of the direction which closes a cover part is mentioned.

  And the said mounting part consists of two members used as the cylinder shape by which the both ends side of the axial direction were opened by combining from the radial direction side of the said electric wire, The said opening / closing means is the joint of the said two members. Of these, one side of the two joints along the axial direction of the electric wire is connected so as to be openable and closable along the radial direction of the electric wire, and the other side of the two joints along the axial direction of the electric wire A biasing force is acting in a direction in which the members abut against each other, and a force is exerted in a direction in which edges facing each other on the other side of the two joints along the axial direction of the electric wire are separated from each other against the biasing force. It is conceivable to have a configuration having an operation section for giving (claim 4). Also in this operation part, for example, on one side of the joint of the two members along the axial direction of the two electric wires, a gripping part is provided on each edge facing the joint, and the gripping parts are gripped and close to each other. The structure which gives a bigger force than the urging | biasing force of the direction which closes a mounting part by doing is mentioned.

  Thereby, the terminal of the electric wire is brought close to the device side to which the terminal of the electric wire is connected in a state where the protective device is covered in advance on the terminal of the electric wire, and the terminal of the electric wire reaches a position where it can be connected to the connected device. Immediately before, the operation part is operated on the cover part to give a force against the urging force in the direction in which the two members come into contact with each other, the cover part is opened, and the end of the electric wire is exposed to the outside to connect to the connected device After that, the operating portion is operated on the mounting portion to apply a force against the urging force in the direction in which the two members abut against each other, and the mounting portion is opened, and the mounting portion and the cover portion connected thereto are connected to the electric wire. Can be removed from.

  On the other hand, the cover part is composed of one member having a plurality of extending pieces extending from the mounting part side of the cover part toward the distal end side of the cover part, and the opening / closing means includes the cover part. The urging force for concentrating the extending piece on the inner side in the radial direction of the electric wire is acting, and the extending piece is opposed to the urging force by the pressing from the inside of the cover portion and directed toward the outer side in the radial direction of the electric wire. It is also possible to adopt a configuration in which a force is applied in the radial opening direction (claim 3). Here, the pressing from the inside of the cover part is performed, for example, by pushing up the end of the electric wire along the axial direction toward the tip portion side of the cover part.

  The mounting portion is formed by abutting edges facing each other at a joint along the axial direction of the electric wire of one plate-like member, and the opening / closing means is arranged in the axial direction of the electric wire of the plate-like member. It is conceivable to provide a configuration that is provided at the edge of the seam along which it can be engaged with and released from the other edge. For example, the engagement and the release are performed by engaging protrusions that protrude alternately from edges facing each other along the axial direction of the electric wire of the member constituting the mounting part. The meshing is released by applying a force in the direction opposite to the contact direction of the edges.

  Thereby, the terminal of the electric wire is brought close to the device side to which the terminal of the electric wire is connected in a state where the protective device is covered in advance on the terminal of the electric wire, and the terminal of the electric wire reaches a position where it can be connected to the connected device. Immediately before, the end of the electric wire is pushed up to the connected device side, and the cover is opened by applying a force against the urging force in the direction in which the extension piece closes against the cover, and the end of the electric wire is exposed to the outside. Then, the device can be connected to the device to be connected, and then the engagement of the engagement portion of the attachment portion can be released to open the attachment portion, and the attachment portion and the cover portion coupled thereto can be removed from the electric wire.

  As described above, according to the present invention, in a state where the protective device is connected in advance to the end of the electric wire, the end of the electric wire is brought close to the device side to which the end of the electric wire is connected, and the end of the electric wire is covered. Immediately before reaching the position where it can be connected to the connected device, open the cover part via the cover opening and closing means, expose the end of the electric wire to the outside and connect it to the connected device, and then open and close the mounting part opening and closing means. The mounting portion is opened, and the mounting portion and the cover portion connected to the mounting portion can be removed from the electric wire.

  Therefore, the removal work of the protective device from the end of the electric wire can be easily performed through the opening / closing means of the mounting portion, and the force applied at that time is relatively smaller than the force of pulling the insulating cap from the end of the electric wire. Because the force is sufficient, there is no possibility that the operator will lose his posture during the removal work of the protective equipment, eliminating the danger of the terminal end of the wire or the operator falling, and the terminal of the dropped wire is energized. In the case of a state, it is possible to eliminate the possibility of causing an electric shock or a ground fault to a person. Furthermore, since the operation of releasing from the attachment to the electric wire through the opening / closing means of the attachment part has been simplified, the removal work of the protective equipment itself can be simplified and shortened to improve the work efficiency. it can.

  In addition, when connecting the terminal of the electric wire to the connected device, it is possible to maintain the state where the terminal of the electric wire is covered with a protective device until just before the connection, so a short circuit with a charging unit other than the connection target of the connected device It is possible to provide a safe working environment for the worker without causing a ground fault.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 4 show an example of an embodiment of a protective device 1 according to the present invention. The protective device 1 includes a bottomed cylindrical cover portion 2 that is open only in one axial direction, and a mounting portion 3 that is open in both the axial directions. Is connected at its axial end via a shaft portion 13 extending from the cover portion 2 to the end opposite to the cover portion 2 of the mounting portion 3 and a leaf spring 11 described later.

  In this embodiment, as shown in FIG. 2, the cover portion 2 includes a surface layer portion 4 formed of an insulating material such as rubber, a middle layer portion 5 formed of a material such as flexible synthetic resin, and the like. The protective device 1 has a three-layer structure formed by an inner layer portion 6 made of an insulating material such as rubber, and has a hollow interior. Even if you hold it in your hand, you can prevent electric shock. In addition, since the middle layer portion 5 is sandwiched between the insulating surface layer portion 5 and the inner layer portion as having flexibility, a metal material such as mild steel may be used. Further, as shown in FIG. 2, the inner layer portion 6 is arranged at the center side in the radial direction of the electric wire 50 in order to prevent the electric wire 50 from dropping off at least in the cylindrical portion and securely hold it in the cover portion 2. A plurality of protrusions extending toward the surface may be formed, and one of the protrusions may wrap the shaft portion 13.

  This cover part 2 is comprised by the cover part structural members 7 and 8 which form the said cover part 2 by combining from the radial direction of the electric wire 50. FIG. In this embodiment, each of the cover portion constituting members 7 and 8 extends from the substantially 1/4 spherical portion and the peripheral edge of the substantially 1/4 spherical portion, and the width dimension is temporarily increased along the radial direction of the electric wire 50. As shown in FIG. 1, the cover portion 2 formed by combining the cover component members 7 and 8 has a substantially hemispherical tip portion and the tip portion. It becomes the shape which connected the cylindrical site | part which spreads in a taper shape from the periphery of a site | part.

  And the cover part structural members 7 and 8 are the holding part 9 in the edge which opposes by this joint in one side of the two joints extended along the axial direction of the electric wire 50 among the joints of the said semi-cylindrical part. 10 are provided. In this embodiment, the gripping portions 9 and 10 extend from the middle layer portion 5 while being inclined with respect to the axial direction of the electric wire 50 toward the substantially hemispherical portion side as shown in FIG. As shown in FIG. 1 (d), it has a shape that spreads along the substantially radial direction of the electric wire 50 while drawing an arc. An example of the gripping portions 9 and 10 includes a plate-like spring 11 having a predetermined width along the axial direction of the electric wire 50 as shown in FIG. More specifically, as shown in FIG. 2, the leaf spring 11 has one end extending from the vicinity of the distal end in the extending direction of the grip portion 9 to the base in the extending direction, and is then attached to the shaft portion 13. The other end of the grip 10 is extended from the base in the extending direction to the vicinity of the tip in the extending direction. In addition, the number of the leaf springs 11 is not one, but a plurality of leaf springs 11 such as both one side and the other side in the longitudinal direction of the electric wires 50 of the gripping portions 9 and 10.

  Moreover, the cover part structural members 7 and 8 are the surface of the edge which opposes by this seam on the opposite side to the side which has the holding parts 9 and 10 among the two seams extending along the axial direction of the said electric wire 50. It is the shape which can mutually contact | abut.

  According to such a structure, in the normal state, the leaf spring 11 is opposite to the direction of the white arrow, that is, the joint on the side having the gripping portions 9 and 10, as shown in FIG. The urging | biasing force is given with respect to the cover part structural members 7 and 8 in the direction which closes the edges which oppose at the joint of the side. On the other hand, the gripping portions 9 and 10 are operated so as to be close to each other as indicated by the arrows in FIG. 2A by pushing the gripping portions 9 and 10 from the outside in the radial direction of the electric wire 50 with, for example, fingers. Then, the arcuate portions slide inward toward each other, and at this time, a force larger than the urging force from the leaf spring 11 is applied to the cover member constituting members 7 and 8, as shown in FIG. As shown in the figure, the entire electric wire 50 is viewed from above the cover 2 between the opposing edges of the joint on the side opposite to the joint on the side having the grips 9, 10 of the cover members 7, 8. It can be released until it is visible.

  As shown in FIG. 3, the mounting portion 3 has a surface layer portion 14 made of an insulating material such as rubber, and is flexible so as to prevent electric shock even when the protective device 1 is held by hand. The inner layer portion 15 formed of a material such as a synthetic resin having a three-layer structure and the inner layer portion 6 formed of an insulating material such as rubber has a hollow shape inside. Further, for the middle layer portion 15, similarly to the middle layer portion 5 of the cover portion 2, a metal material such as mild steel may be used instead of a material such as synthetic resin. Further, as shown in FIG. 3, the inner layer portion 16 has a plurality of protrusions directed toward the center side in the radial direction of the electric wire 50 in order to prevent the electric wire 50 from falling off and securely hold it in the mounting portion 3. It may be formed so as to extend along the axial direction thereof, and one of the protrusions may wrap the shaft portion 13.

  And the mounting part 3 is comprised by the mounting part structural members 17 and 18 which form the said mounting part 3 by combining from the radial direction of the electric wire 50 mentioned later. As shown in FIG. 1, the mounting portion constituting members 17 and 18 extend in the axial direction of the electric wire 50 from the boundary portion with the cover portion 2, and the width dimension of the attachment portion constituting members 17 and 18 increases temporarily along the radial direction of the electric wire 50. As shown in FIG. 1, the mounting portion 3 that has a cylindrical shape and is configured by combining the mounting portion constituting members 17 and 18 has a cylindrical shape that extends in a tapered shape from the boundary portion with the cover portion 2. .

  Further, the mounting portion constituting members 17 and 18 are provided with gripping portions 19 and 20 on the edge facing each other on one side of two joints extending along the axial direction of the electric wire 50. In this embodiment, the gripping portions 19 and 20 are inclined in a direction away from the mounting portion 3 as they proceed from the cover portion 2 side to the non-cover portion 2 side, as shown in FIG. At the same time, as shown in FIG. 1 (d), it extends along the substantially radial direction of the electric wire 50 while drawing an arc, and the widths of the gripping portions 19 and 20 are anti-covered from the cover portion 2 side. As it goes to the part 2 side, the size is increased for a while.

  As shown in FIG. 3, the gripping portions 19 and 20 have a built-in plate-like spring 21 having a predetermined width along the axial direction of the electric wire 50. More specifically, as shown in FIG. 3, the leaf spring 21 has one end that extends from the vicinity of the distal end in the extending direction of the grip portion 19 to the base in the extending direction, and is then attached to the shaft portion 13. The other end of the grip 20 is extended from the base in the extending direction to the vicinity of the tip in the extending direction. Similar to the plate spring 11, the number of the leaf springs 21 is not a single one, but a plurality of leaf springs 21 such as both one side and the other side in the longitudinal direction of the electric wires 50 of the gripping portions 19 and 20. Thus, the leaf spring 21 is wound around the shaft portion 13 and the leaf spring 21 is wound, so that the cover portion 2 and the mounting portion 3 are connected via the leaf springs 11 and 21 and the shaft portion 13. It is in a connected state.

  On the other hand, the mounting portion constituting members 17 and 18 are in the radial direction of the electric wire 50 at the joint opposite to the side having the gripping portions 19 and 20 among the two joints extending along the axial direction of the electric wire 50. The flange portions 23 and 24 extend toward the outer side of the surface, and are shaped so that they can be brought into contact with each other by the surface of the edge facing the joint and the surface facing the flange 23 and 24.

  According to such a structure, in the normal state, the leaf spring 21 is opposite to the direction of the white arrow, that is, the seam on the side having the grip portions 19 and 20, as shown in FIG. A biasing force is applied to the mounting portion constituting members 17 and 18 in a direction in which the edges facing each other at the side joint are closed. On the other hand, the gripping portions 19 and 20 are operated so as to be close to each other as indicated by the arrows in FIG. 3A by pressing the gripping portions 9 and 10 from the outside in the radial direction of the electric wires 50 of the gripping portions 9 and 10, for example. Then, the arcuate portions slide toward each other, and at this time, a force larger than the urging force from the leaf spring 21 is applied to the mounting portion constituting members 17 and 18, and FIG. As shown in the drawing, the edge surface and the flange portions 23, 24 facing each other at the joint on the side opposite to the joint having the grip portions 19, 20 of the mounting member constituting members 17, 18 are connected in the radial direction of the electric wire 50. It is possible to separate until the entire electric wire 50 is seen as viewed from above.

  An example of a process of inserting and connecting the terminal 51 of the electric wire into the hole 53 of the device to be connected (hereinafter referred to as “connected device”) 52 such as a terminal of the watt hour meter using the protective device 1 having the above configuration. Will be described with reference to FIG.

  First, the protective device 1 is put on the terminal 51 of the electric wire from the axial direction in advance, and the protective device 1 is directly held by hand, for example, as shown in FIG. Go closer to hole 53. The protective appliance 1 may be attached in advance to the terminal 51 of the electric wire either in an energized state or in a non-energized state. Next, at a position where the cover part 2 can be opened and closed and the connection of the hole 53 is just before, the grip part 9, 10 is pushed in a direction to bring them close to each other by a finger or the like. With respect to the component member 8, after the terminal portion 51 of the electric wire 50 moves along the axial direction, the cover portion constituent members 7 and 8 are opened in the radial direction of the electric wire 50 to the extent that they do not become an obstacle, and then the electric wire 50 is covered. It pushes up to the hole 53 side of the connection apparatus 52, and the terminal 51 of an electric wire is exposed outside. Furthermore, after inserting the terminal 51 of the electric wire into the hole 53 of the device 52 and connecting it, the gripping portions 19 and 20 are pushed in a direction in which they are brought close to each other by a finger or the like. On the other hand, the wire 50 is opened on the radial direction side to the extent that the distance between the edges facing each other at the joint having the flange portions 23 and 24 is larger than the diameter of the wire 50. Finally, the protector 1 can be removed from the electric wire 50 by moving the attachment portion 3 in a state where the attachment portion constituting member 17 and the attachment portion constituting member 18 are opened along the radial direction of the electric wire 50.

  Therefore, the removal work of the protective device 1 from the terminal 51 of the electric wire can be easily performed only by pushing the grip portions 19 and 20 of the mounting portion 3 in a direction close to each other with a finger, and a relatively strong force. This eliminates the possibility of the operator losing his / her posture during the removal work of the protective equipment 1 and simplifies and shortens the work of removing the protective equipment 1 to improve work efficiency. can do. Further, when the terminal 51 of the electric wire is inserted and connected to the hole 53 of the connected device 52, the state covered with the protective device 1 can be maintained until just before the connection, so that the connected device 52 other than the connected target Therefore, a safe working environment can be provided to the worker without causing a short circuit or a ground fault with the charging part.

  5 and 6 show another example of the embodiment of the protective device 1 according to the present invention. This protective device 1 will be described below. However, the configuration is the same as that of the previous embodiment, that is, the cover portion 2 and the mounting portion 3. Each cover portion 2 has a three-layer structure including a surface layer portion 4, an intermediate layer portion 5, and an inner layer portion 6. Is a three-layer structure composed of a surface layer portion 14, an intermediate layer portion 15, and an inner layer portion 16, and the like is designated by the same reference numeral, and the description thereof is simplified or omitted. The inner layer portion 16 has a structure that securely holds the electric wire 50 so that the electric wire 50 does not fall off.

  The cover portion 2 is composed of a single member having a shape in which a substantially hemispherical tip portion and a cylindrical portion extending in a tapered shape from the periphery of the tip portion are connected. And as shown in (b), by inserting a plurality of cut lines 25 extending from the cylindrical portion side toward the distal end portion side and toward the center side in the radial direction of the electric wire 50, a substantially triangular shaped extension is provided. A plurality of protruding pieces 26 are provided. One of the cut lines 25 is continuous with the joint 33 of the mounting portion 3. In the normal state, these extending pieces 26 are exerted with a biasing force that is concentrated on the radially inner side of the electric wire 50, and the extending pieces 3 oppose the biasing force by pressing from within the cover portion 2. Thus, a force is also applied in the radial direction toward the radially outer side of the electric wire 50.

  The mounting portion 3 is composed of a single mounting portion constituting member 27 having a cylindrical shape extending from the boundary portion with the cover portion 2 in a tapered shape. This mounting portion constituting member 27 is shown in FIG. As shown in (), the plate has a flexibility in the direction of rounding. And while having the some protrusion 30 in the one side of the edge which opposes with the joint line 33 along the axial direction of the electric wire 50 of the mounting part component 27, it opposes with the joint line 33 along the axial direction of the electric wire 50. A plurality of protrusions 31 are provided on the other side of the edge. When these protrusions 30 and 31 extend alternately from the middle layer portion 15 and are closed at the joint 33, the tip portions of the protrusions 30 and 31 protrude on the surface layer portion 14 of the mounting portion 3. Engage in state. Further, the meshing of the protrusions 30 and 31 is performed by applying a force in the direction opposite to the direction in which the mounting part 3 is closed at the joint 33 to the tip part of the protrusions 30 and 31 protruding on the surface layer part 14. Canceled.

  An example of the process of inserting and connecting the terminal 51 of the electric wire into the hole 53 of the connected device 52 such as the terminal of the watt hour meter using the protective device 1 having the above configuration will be described with reference to FIG.

First, the protective device 1 is put on the terminal 51 of the electric wire in advance from the axial direction, and the protective device 1 is directly held by hand, for example, as shown in FIG. Go closer to hole 53. Even in this case, the protective device 1 can be attached to the terminal 51 of the electric wire either during energization or during non-energization. Next, at a position immediately before connection to the hole 53,
By pushing the terminal 51 of the electric wire to the connected device 52 side and applying a force larger than the urging force in the direction in which the extending piece 26 tends to close to the cover portion 2, the extending piece 26 becomes the radial direction of the electric wire 50. As shown in FIG. 6B, the end 51 of the electric wire is exposed to the outside so as to open radially outward. Further, after the terminal 51 of the electric wire is inserted and connected to the hole 53 of the connected device 52, the mounting portion 3 closes at the joint 33 with respect to the tip portion that protrudes on the surface layer portion 14 of the protruding portions 30 and 31. By applying a force in the opposite direction, the engagement between the projecting portions 30 and 31 is released, and the mounting portion 3 is developed so as to have a single plate shape as shown in FIG. Is done. Finally, the protective device 1 can be removed from the electric wire 50 by moving the mounting portion 3 along the radial direction of the electric wire 50.

  Therefore, also in this embodiment, the removal work of the protective device 1 from the terminal 51 of the electric wire is opposite to the direction in which the mounting portion 3 closes at the joint 33 with respect to the tip portions of the protruding portions 30 and 31 of the mounting portion 3. Since it is not necessary to apply a relatively strong force, it is not necessary for the operator to lose his / her posture during the removal work of the protective device 1, and the protective device 1 The removal work itself can be simplified and shortened, and the work efficiency can be improved. Further, when the terminal 51 of the electric wire is inserted and connected to the hole 53 of the connected device 52, the state covered with the protective device 1 can be maintained until just before the connection, so that the connected device 52 other than the connected target Therefore, a safe working environment can be provided to the worker without causing a short circuit or a ground fault with the charging part.

FIG. 1 is an explanatory view showing an embodiment of a protective device according to the present invention, FIG. 1 (a) is a plan view of the protective device, and FIG. 1 (b) is a front view of the protective device. 1 (c) is a side view of the protective device, and FIG. 1 (d) is a bottom view of the protective device. FIG. 2 is a schematic half sectional view of the cover part of the protective device as seen from the axial direction side. FIG. 2 (a) shows a state in which the cover part is closed, and FIG. The part is shown open. FIG. 3 is a schematic cross-sectional view of the mounting part of the protective device as seen from the axial direction side, FIG. 3 (a) shows a state where the mounting part is closed, and FIG. 3 (b) shows the mounting part. Indicates an open state. FIG. 4 is an explanatory view showing a process of inserting the terminal stored in the protective device into the terminal hole, and FIG. 4 (a) shows a process of bringing the protective device close to the terminal hole. 4 (b) shows a state in which the terminal portion is exposed to the outside by opening the cover portion by bringing the two gripping portions close to each other at the closest position of the hole of the terminal, and FIG. When inserted into the terminal hole and connected, the mounting part is opened and the protective device is removed from the electric wire. FIG. 5 is an explanatory view showing another embodiment of the protective device according to the present invention, FIG. 5 (a) is a plan view of the protective device, and FIG. 5 (b) is a front view of the protective device. FIG. 5C is a side view of the protective device, and FIG. 5D is a bottom view of the protective device. FIG. 6 is an explanatory diagram showing a process of inserting the terminal stored in the protective device into the terminal hole, and FIG. 6A shows a process of bringing the protective device close to the terminal hole. 6 (b) shows a state in which the terminal is exposed to the outside by opening the cover part by pushing the electric wire to the terminal hole side at the nearest position of the terminal hole, and FIG. 6 (c) shows the terminal being the terminal When inserted and connected to the hole, the mounting part is opened and the protective device is removed from the electric wire. FIG. 7 is an explanatory view showing a state in which the end of the electric wire is removed from the terminal of the watt hour meter and a conventional insulating cap is put on the end of the electric wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Protective instrument 2 Cover part 3 Mounting part 4 Surface layer part 5 Middle layer part 6 Inner layer part 7 Cover part structural member (the 1 of two members)
8 Cover part component (Part 2 of the two parts)
9 Grasping part (operating part for opening / closing means)
10 Grasping part (operating part for opening / closing means)
11 Leaf spring (opening / closing means)
13 Shaft part 14 Surface layer part 15 Middle layer part 16 Inner layer part 17 Mounting part constituent member (part 1 of two members)
18 Mounting member components (Part 2 of the two members)
19 Grasping part (operating part for opening / closing means)
20 gripping part (operating part of the opening / closing means)
21 Leaf spring (opening / closing means)
22 Flange part 23 Flange part 25 Cut line
26 Extending piece 27 Mounting part constituting member (plate-like member)
30 Projection (opening / closing means)
31 Projection (opening / closing means)
50 Electric wire 51 Terminal 52 Connected device 53 Hole

Claims (5)

A cover portion for covering the terminal of the electric wire and an attachment portion for attaching to the electric wire are connected along the axial direction of the electric wire,
The cover portion has an opening / closing means that can be opened in a direction away from at least an axis extending from an end of the electric wire,
The mounting device has an opening / closing means that can be opened so as to spread in a radial direction of the electric wire. The cover part is composed of two members having a bottomed cylindrical shape by combining from the radial direction of the electric wire,
The opening / closing means is connected to one side of two joints along the axial direction of the electric wire among the joints of the two members so as to be openable and closable along the radial direction of the electric wire. On the other side of the two seams along the line, an urging force is acting in a direction in which the two members abut against each other, and the two seams along the axial direction of the electric wire are opposed to the urging force. 2. The protective device according to claim 1, further comprising an operation portion that applies force in a direction in which edges facing each other on the other side are separated from each other. The cover portion is composed of one member having a plurality of extending pieces extending from the mounting portion side of the cover portion toward the tip end side of the cover portion,
The opening / closing means has a biasing force for concentrating the extension piece of the cover portion on the radially inner side of the electric wire, and the extension piece opposes the biasing force by pressing from within the cover portion. The protective device according to claim 1, wherein a force is applied in a direction in which the electric wire is radially opened toward a radially outer side of the electric wire. The mounting portion is composed of two members having a cylindrical shape with both ends in the axial direction being opened by combining from the radial side of the electric wire,
The opening / closing means is connected to one side of two joints along the axial direction of the electric wire among the joints of the two members so as to be openable and closable along the radial direction of the electric wire. On the other side of the two seams along the line, an urging force is acting in a direction in which the two members abut against each other, and the two seams along the axial direction of the electric wire are opposed to the urging force. 3. The protective device according to claim 1, further comprising an operation unit that applies force in a direction in which edges facing each other on the other side are separated from each other. The mounting portion is formed by abutting edges facing each other at a joint along the axial direction of the electric wire of one plate-like member,
The said opening / closing means is provided on the edge of the seam along the axial direction of the electric wire of the plate-like member, and is configured to be able to engage with and release from the other edge. 3. The protective device according to 3.

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