Compression tool for indirect live wire

Abstract

To provide a compression tool for indirect live wire, which can interrupt compression operation during compression work of a connection sleeve.SOLUTION: A compression tool for indirect live wire 1A includes: a pair of operation parts 2 and 2'; compression parts 5 and 5' for performing compression by closing operation of a pair of operation parts 2 and 2'; a latchet mechanism 7 for suppressing opening of the operation parts 2 and 2' during closing; and a pair of adapters 11 and 11' which are directly or indirectly provided close to the end of a pair of operation parts 2 and 2' and individually connect the operation parts 2 and 2A' to each of a pair of tip parts 51a an 51a' in an indirect live wire holding tool 50. The latchet mechanism 7 includes a latchet tooth; a pawl member having a pawl engaged to the latchet tooth; a return member for returning the pawl member to a locking position with the latchet tooth; and a release mechanism 14 which is directly or indirectly connected to the pawl member, operates the pawl member from outside the latchet mechanism and releases the locking state of the pawl and the latchet tooth.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an indirect live-line compression tool used when connecting electric wires by an indirect live-line method using a connection sleeve.

[0002] In power distribution lines, work such as resuspending a transformer may require the connection of electric wires. For example, a high-voltage downline is an electric wire that is pulled from a high-voltage line installed between utility poles to a transformer, and when the transformer is replaced, it is necessary to connect this high-voltage downline to the primary electric wire of the transformer. This connection is usually performed by using a connection sleeve, butting the electric wires together inside the connection sleeve, and compressing both sides of the butted part from the outside of the connection sleeve to integrate the connection sleeve and the electric wires. A known compression device used in this connection work is shown in FIG.

[0003] First, the prior art will be described with reference to FIG. FIG. 12 is a schematic perspective view showing a state in which electric wires are connected to each other using a connecting sleeve by a conventional indirect live-line construction method. When connecting electric wire 61 and electric wire 62 using a conventional indirect live-line construction method, for example as shown in FIG. 12, electric wire 61 and electric wire 62 are inserted from the respective opening ends of connecting sleeve 63, and then connecting wires 61 and 62 to each other by compressing connecting sleeve 63 with compression device 64. Normally, the connection sleeve 63 is compressed at two points, one on either side of the point where the electric wires 61, 62 are butted together, but one point on the transformer side, i.e., the electric wire 61 side on the primary side of the transformer, is compressed (crimped) in advance during power outage work, and Figure 12 shows the remaining point, i.e., the high-voltage downline (electric wire) 61 side, being compressed (crimped) using the indirect live-line method (conventional method).

[0004] Moreover, the compression device 64 used in the conventional indirect live-line construction method has compression pliers 66 attached to the tip of an insulating operating rod 65. Furthermore, when operating the compression pliers 66, that is, when compressing the connection sleeve 63, the hook portion 74 attached to the tip of the other insulating operating rod 65' is used. 12, the compression pliers 66 has a compression member 68 axially attached to a stationary member 67, and further has a receiving portion 69 at the tip of the stationary member 67 and a compression portion 70 at the tip of the compression member 68. The end of the compression member 68 of the compression pliers 66 that does not have the compression portion 70 has a transmission member 71 and a pulling member 72 in this order, and the tip of the pulling member 72 further has a ring member 73. When operating such compression pliers 66, the hook portion 74 is hooked onto the ring member 73 provided at the tip of the traction member 72, and the ring member 73 is pulled in the direction indicated by the symbol P in FIG. 12, thereby closing the compression member 68, thereby compressing the connecting sleeve 63 sandwiched between the compression portion 70 and the receiving portion 69.

[0005] Furthermore, the compression connection work using the conventional method as described above is usually performed by two workers. In this case, one worker holds the indirect live-wire gripping tools (insulated pliers) 75, 75' in each hand, and also operates the indirect live-wire gripping tools 75, 75' with each hand to support the electric wires 61, 62. In addition, the other worker (the worker performing the compression work) operates the connection sleeve 63 into which the high-voltage downline (electric wire) 62 is inserted so that it is correctly set in either the receiving portion 69 of the immovable member 67 or the compression portion 70 of the compression member 68, while operating the insulated operating rod 65' having a hook portion 74 attached to its tip in the direction of arrow P to close the compression member 68, thereby compressing the connection sleeve 63. It should be noted that the compression pliers 66 shown in FIG. 12 will not close unless the pulling member 72 is pulled in the direction of the arrow P with a certain degree of strong force.

[0006] When using the conventional compression device 64 shown in Fig. 12, it is necessary to perform an operation of pulling down the hook portion 74 connected to the insulating operating rod 65' vertically downward in order to compress the connection sleeve 63. At this time, the other worker (the worker performing the compression work) also holds the compression device 64 with a hand other than the hand holding the insulating operating rod 65'. For this reason, when the other worker performs the operation of pulling down the hook portion 74 vertically downward, there is a possibility that he or she will unintentionally pull down the compression device 64 vertically downward as well. In this case, the connection sleeve 63 during the compression operation is pulled vertically downward together with the compression pliers 66, causing the connection sleeve 63 to bend, i.e., to deform the connection sleeve 63. In this case, it is necessary to redo the connection operation of the electric wires 61 and 62 using the connection sleeve 63, making it difficult to improve the work efficiency.

[0007] Furthermore, when using the compression device 64 according to the conventional technology as shown in FIG. 12, two workers must hold the indirect live-line tool in both hands while working, which means that each worker is unable to secure sufficient working space. As a result, when the workers' arms or bodies come into contact with each other, the electric wires 61 and 62 may unintentionally come out of the connecting sleeve 63, making it difficult to work efficiently. In addition, the compression device 64 according to the conventional technology as shown in FIG. 12 is quite heavy, which causes a large physical burden on the operator. In order to address the above-mentioned problems, the applicant of the present application has previously invented and filed a patent application as shown in Patent Document 1 below.

[0008] Patent Document 1 discloses an invention entitled "Indirect live-line tip tool" that relates to an indirect live-line tip tool that can be connected to the tip of an indirect live-line gripping tool used for indirect live-line work. The invention disclosed in Patent Document 1 comprises a pair of tooth portions that move toward and away from each other by the movement of the pair of operating parts toward and away from each other, and a connection portion provided at the base end of the pair of operating parts to which the tip end of an indirect live line gripping tool can be connected, and each of the opposing portions of the tooth portions is provided with a compression portion formed in a concave shape that can be compressed to receive a connection sleeve for connecting electric wires, and the compression portion is formed only at one opposing location of the pair of tooth portions. According to the indirect live-line tip tool disclosed in Patent Document 1 having the above configuration, the base end of the operating part is provided with a connection part to which the tip of the indirect live-line gripping tool can be connected, so that the compression action of the tooth part can be operated in conjunction with the gripping action of the indirect live-line gripping tool. In this case, unlike the case of using the compression device 64 according to the prior art shown in FIG. 12, the compression operation of the connection sleeve can be performed without using a plurality of insulating operating rods. Therefore, according to the indirect live-line tip tool disclosed in Patent Document 1, since it can be operated with a single indirect live-line gripping tool, it is possible to reduce fatigue of the worker. Furthermore, according to the invention disclosed in Patent Document 1, it is also possible to prevent the operation rod of the worker from coming into contact with the operation rod of the assistant, which would cause a hindrance to the work. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2014-138460 A Summary of the Invention [Problem to be solved by the invention]

[0010] The indirect live line tip tool (1) disclosed in the above-mentioned Patent Document 1 is provided with a stopper mechanism (8) for restricting the movement of the operating parts (21, 22) in the separating direction until the tooth part (3) reaches a predetermined position when the operating parts (21, 22) are moved toward each other. However, Patent Document 1 does not disclose a specific structure of this stopper mechanism (8), nor does it disclose any specific structure for operating this stopper mechanism (8). Therefore, when the indirect live-line tip tool (1) disclosed in Patent Document 1 is indirectly operated by the indirect live-line gripping tool (5), it was unclear how to interrupt the compression operation of the connection sleeve by the tooth portion (3).

[0011] The present invention has been made in response to such conventional circumstances, and its purpose is to provide an indirect live line compression tool that eliminates the need for one operator to operate multiple insulating operating rods when compressing a connection sleeve, and that allows the compression operation to be interrupted as necessary during the compression work of the connection sleeve. [Means for solving the problem]

[0012] The first invention for solving the above problems is an indirect live line compression tool comprising a pair of operating parts connected to be freely rotatable via a pivot shaft, a crimping part that performs crimping by closing the pair of operating parts, a ratchet mechanism interposed between the pair of operating parts and suppressing the opening of the operating parts during the closing movement, and a pair of adapters directly or indirectly provided near the end of the pair of operating parts on the side where the crimping parts are not located and enabling the operating parts to be individually connected to each of the pair of tip parts of the indirect live line gripping tool, wherein the ratchet mechanism comprises a pawl member having ratchet teeth and a pawl that engages with the ratchet teeth, a return member that returns the pawl member to an engagement position with the ratchet teeth, and a release mechanism that is directly or indirectly connected to the pawl member and operates the pawl member from outside the ratchet mechanism to release the engagement state between the pawl and the ratchet teeth. In the first aspect of the present invention having the above-mentioned configuration, the pair of operating parts rotatably connected via the pivot shaft have the function of operating the crimping part to open and close, thereby allowing the connecting sleeve to be compressed by the crimping part. In addition, in the first invention, the ratchet mechanism includes ratchet teeth, a pawl member, and a return member, and when the operating parts are closed, the pawl member moves sequentially over the ratchet teeth arranged in series while repeatedly engaging with and releasing from the ratchet teeth. In other words, the ratchet mechanism has the effect of restricting the pair of operating parts from opening while the pair of operating parts is closing. Furthermore, the pair of adapters are directly or indirectly provided near the end of the pair of operating parts on the side where the crimping part is not located, and have the effect of enabling the operating parts to be individually connected to each of the pair of tip parts of the indirect live wire gripping tool. In addition, the release mechanism has the function of indirectly operating the pawl member from outside the ratchet mechanism to release the engagement between the pawl member and the ratchet teeth. As a result, in the first invention, the pair of operating parts can be opened as necessary during the closing operation of the pair of operating parts by the indirect live wire gripping tool (insulated pliers).

[0013] The second invention is the above-mentioned first invention, wherein the ratchet mechanism comprises a ratchet bar having ratchet teeth and rotatably connected to one operating part, and a case member having a ratchet bar storage section that stores the ratchet bar so that it can slide freely in its central axis direction and is rotatably connected to the other operating part, and the pawl member is stored within the case member and is pivotally mounted to the case member so as to be rotatable. The second invention having the above-mentioned configuration is a more specific specification of the ratchet mechanism in the first invention described above, and its operation is the same as that of the first invention described above. In the ratchet mechanism of the second invention, a ratchet bar having ratchet teeth is rotatably connected to one operating part, and a case member that houses the ratchet bar so that it can slide along its central axis is rotatably connected to the other operating part. Furthermore, a pawl member that is housed in the case member and pivotally mounted on the case member engages with the ratchet teeth, thereby restricting the opening movement of the pair of operating parts (the one operating part and the other operating part) by the ratchet mechanism. The pawl member can be remotely operated by the release mechanism to release the engagement between the pawl member and the ratchet teeth, thereby opening and closing the pair of operating parts (one operating part and the other operating part).

[0014] A third invention is the above-mentioned first or second invention, characterized in that it further comprises a holder interposed between the operation unit and the adapter for holding the operation unit. In the third invention having the above configuration, by indirectly holding the operating part via the holding device, it has the effect of making it possible to repurpose a compression tool with a ratchet mechanism, which is a conventionally known hand tool, as a compression mechanism having a pair of operating parts, a compression part, and a ratchet mechanism.

[0015] A fourth invention according to any one of the first to third inventions described above is characterized in that the connector further comprises a clip that is provided directly or indirectly on the crimping portion and holds the connecting sleeve. In the fourth invention having the above configuration, the clip has a function of disposing the connecting sleeve at a position adjacent to the compression portion during the compression operation of the connecting sleeve.

[0016] The fifth invention is characterized in that, in any of the first to fifth inventions described above, the release mechanism comprises a wire directly or indirectly connected to the claw member, and a handle provided on the end of the wire that is not connected to the claw member. The fifth invention having the above configuration has the effect that the release mechanism has a handle, making it easy for a worker performing indirect live-line work to clamp or grip the end of the wire that is not connected to the claw member, even when the worker is wearing thick rubber gloves to prevent electric shock. Furthermore, in the fifth invention, the wire in the release mechanism has the effect of transmitting the external force acting on the wire when an operator pulls the handle to the pawl member of the ratchet mechanism. That is, in the fifth aspect of the present invention, the engagement between the ratchet teeth and the pawl member in the ratchet mechanism can be released by remotely operating the pawl member via the wire. Effect of the Invention

[0017] According to the first and second inventions described above, the compression operation of the connection sleeve can be performed using one indirect live-wire gripping tool (insulated pliers). In addition, the operator can interrupt the compression operation of the connection sleeve by the crimping part and separate the compression part from the connection sleeve when necessary during the operation. Therefore, according to the first and second inventions, the physical burden on the worker when compressing the connection sleeve can be reduced, while the worker can enjoy the same convenience when performing indirect live-line work as when using a compression tool with a ratchet mechanism, which is a conventionally known hand tool.

[0018] According to the third aspect of the present invention, a compression tool with a ratchet mechanism, which is a conventionally known hand tool, can be used as it is as a compression structure consisting of a pair of operating parts, a compression part, and a ratchet mechanism. In this case, when manufacturing the third invention, the costs required for manufacturing the third invention can be significantly reduced compared to when a compression tool with a ratchet mechanism, which is a conventionally known hand tool, is manufactured from scratch. Therefore, according to the third aspect of the present invention, a highly convenient indirect live line compression tool can be provided at a low cost.

[0019] Because the fourth invention is equipped with a clip, there is no need to hold the connection sleeve using an indirect live line gripping tool (insulated pliers) separate from the indirect live line gripping tool (insulated pliers) used to operate the indirect live line compression tool which is the fourth invention. Therefore, according to the fourth aspect of the present invention, it is possible to improve the workability when compressing the connection sleeve using the indirect live line compression tool.

[0020] According to the fifth aspect of the present invention, the structure of the release mechanism can be simplified without impairing the operability of the mechanism. Therefore, according to the fifth aspect of the present invention, it is possible to provide an indirect live wire compression tool that is easy to operate and has low manufacturing costs. [Brief description of the drawings]

[0021] [Figure 1]1 is a front view showing a state in which a crimping portion of the indirect live wire compression tool according to the present embodiment is closed. FIG. [Diagram 2] 1 is a front view showing a state in which the crimping portion of the indirect live wire compression tool according to the embodiment is open. FIG. [Diagram 3] FIG. 2 is a partial perspective view for explaining a method of using the indirect live wire compression tool according to the present embodiment. [Figure 4] 4 is a partial front view showing a ratchet mechanism and its release mechanism in the indirect live line compression tool according to the embodiment. FIG. [Diagram 5] 1 is an enlarged view of a main portion for explaining the operation of a release mechanism in the indirect live wire compression tool according to the present embodiment. FIG. [Figure 6] 13 is an enlarged view of a main portion showing a modified example of the release mechanism in the indirect live wire compression tool according to the embodiment. FIG. [Figure 7A] FIG. 13 is a front view showing a state in which the crimping portion of the indirect live wire compression tool according to another embodiment is closed. [Figure 7B] FIG. 13 is a front view showing a state in which the crimping portion of the indirect live wire compression tool according to another embodiment is open. [Figure 8] FIG. 13 is a front view of a compression tool with a release mechanism in an indirect live-wire compression tool according to another embodiment. [Figure 9] FIG. 13 is a front view of a holder and its associated structure in an indirect live wire compression tool according to another embodiment. [Figure 10] 10 is a cross-sectional view taken along line AA in FIG. 9. [Figure 11] 10 is a cross-sectional view taken along line BB in FIG. [Figure 12] 1 is a schematic perspective view showing a state in which electric wires are connected to each other using a connecting sleeve by a conventional indirect live-line construction method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] An indirect live wire compression tool according to an embodiment of the present invention will be described in detail with reference to FIGS.

[0023] [1-1: Basic configuration of the present invention] First, a basic configuration of an indirect live-wire compression tool according to an embodiment of the present invention (hereinafter simply referred to as "the present embodiment") will be described with reference to FIG. Fig. 1 is a front view showing a state in which the crimping portion of the indirect live line compression tool according to the present embodiment is closed, and Fig. 2 is a front view showing a state in which the crimping portion of the indirect live line compression tool is open. For example, as shown in Figure 1, the indirect live line compression tool 1A of this embodiment mainly comprises a compression mechanism 43 having crimping portions 5, 5' that compress the connection sleeve 56 shown in Figure 3 below, operating arms 9, 9' connected to the ends 2b, 2b' of the compression mechanism 43 on the side where the crimping portions 5, 5' are not arranged, and adapters 11, 11' connected to the ends of the operating arms 9, 9' on the side where the compression mechanism 43 is not arranged. Furthermore, the indirect live line compression tool 1A of this embodiment is equipped with a ratchet mechanism 7 for preventing the operating arms 9, 9' from opening unintentionally when the connection sleeve 56 is compressed by the crimping portions 5, 5', and a remotely operable release mechanism 14 for releasing the state in which the opening movement of the operating arms 9, 9' is restricted by this ratchet mechanism 7 as necessary. The indirect live line compression tool 1A of this embodiment as described above can indirectly open and close the crimping portions 5, 5' by attaching adapters 11, 11' to the tip portions 51a, 51a' of the clamping arms 51, 51' of an indirect live line gripping tool 50 (insulated pliers), as shown in Figure 1, for example. Furthermore, by operating the end of the release mechanism 14 that is not connected to the ratchet mechanism 7, the ratchet mechanism 7 can be released as necessary. FIG. 2 shows a state in which the crimping portions 5, 5' are indirectly opened by opening the clamping arms 51, 51' of the indirect live-wire gripping tool 50.

[0024] The mechanism of operation of the clamping arms 51, 51' in the indirect live wire gripping tool 50 is as follows. The clamping arm 51 and the clamping arm 51' of the indirect live wire gripping tool 50 are connected to each other so as to be able to open and close freely via a pivot shaft 55. In addition, a link member 53 and an operating rod 54 are connected via a pivot shaft 52 to a base end portion 51b of the clamping arm 51 opposite to a tip end portion 51a. When an operator operates an operating handle (not shown) connected to the operating rod 54 , the base end portion 51 b of the clamping arm 51 is operated via the link member 53 . As a result, the clamping arm 51 opens and closes about the pivot shaft 55 in the direction indicated by the symbol Q or the symbol Q' in FIG.

[0025] [1-2: About the action and effect of the basic configuration of this invention] According to the indirect live wire compression tool 1A according to this embodiment as described above, the compression operation of the connection sleeve 56 can be performed by only one indirect live wire gripping tool 50 (insulated pliers). Furthermore, since the indirect live line compression tool 1A of this embodiment is equipped with a ratchet mechanism 7, it is possible to prevent the crimping portions 5, 5' from unintentionally opening during the compression operation by the crimping portions 5, 5', thereby preventing the compression operation of the connection sleeve 56 from being interrupted. Furthermore, since the indirect live line compression tool 1A according to this embodiment is provided with the release mechanism 14, the worker can release the ratchet mechanism 7 by operating the release mechanism 14 when necessary. More specifically, if a malfunction occurs during the compression operation of the connection sleeve 56 (see Figure 3 below) by the crimping portions 5, 5' and it becomes necessary to interrupt the compression operation, the operator can release the ratchet mechanism 7 by operating the release mechanism 14. Then, by releasing the ratchet mechanism 7 of the indirect live line compression tool 1A according to this embodiment, the compression operation by the crimping portions 5, 5' can be interrupted and the crimping portions 5, 5' can be separated from the connection sleeve 56. Therefore, according to the indirect live-line compression tool 1A of this embodiment, it is possible to provide an indirect live-line compression tool that can be operated using a single indirect live-line tool (e.g., insulated pliers), which reduces the physical burden on the worker, prevents the crimping portions 5, 5' from unintentionally coming off the connection sleeve 56 during the compression operation, and allows the compression operation to be easily interrupted when necessary. According to the indirect live line crimping tool 1A as described above, the efficiency of the work when connecting electric wires using the connecting sleeve 56 can be improved.

[0026] [1-3: Modifications of the basic configuration of the present invention] The basic configuration of the present invention shown in [1-1] above may include the following configurations either alone or in combination as desired, as necessary. <1-3-1; About the clip> Fig. 3 is a partial perspective view for explaining a method of using the indirect live-line compression tool according to the present embodiment. Note that the same parts as those shown in Figs. 1 and 2 are given the same reference numerals, and the explanation of the configurations thereof will be omitted. As shown in Figures 1 to 3, the crimping portion 5' of the indirect live line compression tool 1A of this embodiment may be provided with a clip 15 (optional component) via a protruding connecting portion 20 fixed to the crimping portion 5'. In this case, as shown in FIG. 3, a conductor 59 of an electric wire 58 from which the insulating outer sheath 60 has been stripped is inserted into an opening end 56b formed at the central axial end of the connecting sleeve 56, and when the overlapping portion of the connecting sleeve 56 and the conductor 59 is compressed and fixed by the crimping portions 5, 5' of the indirect live line compression tool 1A (compression mechanism 43), the connecting sleeve 56 can be held in place near the crimping portions 5, 5' by the clip 15. The same applies when connecting the electric wire 57 to the other open end 56a of the connection sleeve 56.

[0027] In addition, the clip 15 as described above has a pair of clamping portions 16, 16' that grip the connecting sleeve 56 connected via a pivot shaft 17 so as to be freely opened and closed, as shown in Figures 1 to 3, and further includes operating knob portions 18, 18' for opening and closing the pair of clamping portions 16, 16'. Furthermore, the clip 15 as described above is provided with an elastic member (e.g., a C-shaped spring, a torsion spring, a leaf spring, etc.) for constantly keeping the pair of clamping portions 16, 16' closed, although this is not specifically shown. In addition, the clip 15 as described above can indirectly open and close the pair of clamping portions 16, 16' by opening and closing the pair of operating knob portions 18, 18' using an indirect live-line gripping tool 50 other than the indirect live-line gripping tool 50 for operating the indirect live-line compression tool 1A of this embodiment. In addition, before the connecting sleeve 56 is fixed (crimped) to the electric wire 57 or the electric wire 58, the worker can operate the pair of operating knobs 18, 18' with his / her own fingers to hold the connecting sleeve 56 with the clip 15. In addition, when removing the clip 15 from the connecting sleeve 56 after the electric wire 58 and the electric wire 57 have been connected by the connecting sleeve 56, the pair of operating knobs 18, 18' can be operated using another indirect live wire holding tool 50 as described above.

[0028] Then, after connecting the electric wire 58 to the opening end 56b of the connection sleeve 56, to further connect (compress) the electric wire 57 to the opening end 56a, the indirect live line compression tool 1A and the clip 15 are temporarily removed from the connection sleeve 56, and then the clip 15 is reattached so that it is positioned on the right hand side of the page, and then the same procedure as described above is carried out. More specifically, the electric wire 57, whose insulating outer sheath 60 has been stripped to expose the conductor 59, is inserted into the open end 56a of the connecting sleeve 56, and then the overlapping portion of the connecting sleeve 56 and the conductor 59 is compressed by the crimping portions 5, 5' of the indirect live line compression tool 1A (compression mechanism 43). In the indirect live line compression tool 1A according to the present embodiment, the clip 15 is provided on the crimping portion 5', but the clip 15 may be provided on the crimping portion 5. In this case, the same effects and advantages as those described above are achieved.

[0029] <1-3-2: Detailed structure of compression mechanism etc.> Here, the compression mechanism 43 in the indirect live wire compression tool 1A according to this embodiment and the structure for mounting this compression mechanism 43 on the indirect live wire gripping tool 50 will be described in more detail. The compression mechanism 43 of the indirect live line compression tool 1A of this embodiment includes, as shown in Figures 1 and 2, a pair of operating parts 2, 2' that are rotatably connected via a pivot shaft 3, crimping parts 5, 5' that perform crimping by the closing movement of the pair of operating parts 2, 2', and a ratchet mechanism 7 that is interposed between the pair of operating parts 2, 2' and prevents the operating parts 2, 2' from opening unintentionally during the closing movement. Furthermore, in the indirect live line compression tool 1A of this embodiment, an operating arm 9 is connected via a pivot shaft 8 to the end 2b of the operating part 2 on the side where the crimping part 5 is not arranged, and an operating arm 9' is connected via a pivot shaft 8' to the end 2b' of the operating part 2' on the side where the crimping part 5' is not arranged. In addition, an adapter 11 is connected via a pivot shaft 10 to the end of the operating arm 9 that is not connected to the operating unit 2, and an adapter 11' is connected via a pivot shaft 10' to the end of the operating arm 9' that is not connected to the operating unit 2'.

[0030] In addition, the adapter 11 in the indirect live line compression tool 1A of this embodiment is equipped with a socket 12 that is removably attached to the tip 51a of the clamping arm 51 of the indirect live line gripping tool 50, and a hooking means 13 that protrudes from the peripheral side surface of the socket 12 and switches between a fixed state of the socket 12 to the tip 51a of the clamping arm 51 and its release. Similarly, an adapter 11' attached to a tip portion 51a' of a clamping arm 51 of an indirect live-wire gripping tool 50 also includes a socket 12' and a latching means 13'. In the indirect live-wire compression tool 1A according to this embodiment, the crimping portions 5, 5', the operating portions 2, 2', the operating arms 9, 9' and the adapters 11, 11' function as a link mechanism. As a result, by attaching the indirect live line compression tool 1A to the clamping arms 51, 51' of the indirect live line gripping tool 50 (insulated pliers) and opening and closing the clamping arms 51, 51' of the indirect live line gripping tool 50, the crimping portions 5, 5' can be opened and closed in conjunction with this operation (see Figures 1 and 2).

[0031] Here, the mechanism by which the pressure-bonding portions 5, 5' are opened and closed will be described in more detail with reference to Figs. In the indirect live line compression tool 1A according to this embodiment, the crimping part 5 is connected to the base 2a of the operating part 2 via a pivot shaft 4. Similarly, the crimping part 5' is also connected to the base 2a' of the operating part 2' via a pivot shaft 4'. In addition, both the crimping portion 5 and the crimping portion 5' are connected to a connecting plate 45 via a pivot shaft 44 provided in the crimping portion 5 and a pivot shaft 44' provided in the crimping portion 5'. By configuring the periphery of the pressure-bonding portions 5, 5' as described above, the operation portions 2, 2', the pressure-bonding portions 5, 5', the pivot shafts 44, 44' and the connecting plate 45 function as a link mechanism. That is, by operating the indirect live-wire gripping tool 50 (insulated pliers) to indirectly open the operating portions 2, 2', the crimping portions 5, 5' can be opened in conjunction with this operation. Similarly, by closing the operating parts 2, 2', the crimping parts 5, 5' can be closed in conjunction with this operation. That is, the compression dies (e.g., compression dies 6a to 6c, etc.) of the crimping parts 5, 5' can compress the connection sleeve 56 (see FIG. 3), which is the object to be compressed.

[0032] As shown in Figs. 1 and 2, the crimping portions 5, 5' of the indirect live line crimping tool 1A according to this embodiment may include three types of compression dies 6a to 6c of different sizes (optional components). In this case, the indirect live line compression tool 1A of this embodiment can perform compression operations on multiple types (more specifically, three types) of connection sleeves 56 of different sizes, thereby improving the versatility of the indirect live line compression tool 1A. In addition, the indirect live line compression tool 1A in this embodiment may have only one type of compression die provided in the crimping portion 5, 5', and an indirect live line compression tool 1A equipped with different compression dies for each size of the connection sleeve 56 to be used may be prepared and used (optional component). In particular, in the latter case, although it is necessary to individually prepare the indirect live line compression tool 1A according to the present embodiment according to the size of the connection sleeve 56, it is possible to prevent operational errors such as accidentally compressing the connection sleeve 56 with an unintended compression die during indirect live line work. In this case, it is possible to prevent problems such as poor connection of the electric wires from occurring.

[0033] In addition, when the crimping portion 5 or the crimping portion 5' of the indirect live line compression tool 1A in this embodiment is equipped with a clip 15, the clamping portions 16, 16' of this clip 15 may be provided with a clamping recess (e.g., clamping recess 19a-19c) of a shape that matches the compression die (e.g., compression dies 6a-6c, etc.) at a position that matches the recess of the compression die (e.g., compression dies 6a-6c, etc.) when the crimping portion 5, 5' in the closed state is viewed from the front (= the state shown in Figure 1).

[0034] <1-3-3: Detailed structure of ratchet mechanism and release mechanism> Next, the ratchet mechanism 7 and the release mechanism 14 of the indirect live line compression tool 1A according to this embodiment will be described in more detail with reference to FIGS. Fig. 4 is a partial front view showing the ratchet mechanism and its release mechanism in the indirect live-line compression tool according to this embodiment. Fig. 5 is an enlarged view of the main part for explaining the operation of the release mechanism in the indirect live-line compression tool according to this embodiment. The same parts as those shown in Figs. 1 to 3 are given the same reference numerals, and the description of their configurations is omitted. As shown in FIG. 4, the ratchet mechanism 7 in the indirect live line compression tool 1A according to this embodiment mainly includes a pawl member 26 having a plurality of sawtooth-shaped ratchet teeth 22, a pawl member 26a that engages with the ratchet teeth 22, and a return member (e.g., a return spring 28) that returns the pawl member 26 to the engagement position with the ratchet teeth 22. In the ratchet mechanism 7 as described above, the pawl 26a of the pawl member 26 engages with the ratchet teeth 22, thereby preventing the operating parts 2, 2' from opening unintentionally (see the direction indicated by the symbols Z, Z in FIG. 4) during the closing operation of the operating parts 2, 2' (see the direction indicated by the symbols Y, Y in FIG. 4).

[0035] Moreover, a compression tool that is generally used as a hand tool is equipped with a ratchet mechanism 7 as shown in Fig. 4. When performing a compression operation using a compression tool that is a hand tool equipped with such a ratchet mechanism 7, if it is desired to interrupt the compression operation, the tip of a hand tool such as a conventionally known screwdriver may be inserted from the direction indicated by the symbol X in Fig. 4 to forcibly release the engagement between the pawl 26a and the ratchet teeth 22. However, the compression mechanism 43 of the indirect live-wire compression tool 1A according to this embodiment is indirectly operated by being attached to an indirect live-wire gripping tool 50 (insulated pliers) as shown in Figures 1 and 2. In other words, the ratchet mechanism 7 of the compression mechanism 43 is not located in a position that can be reached by a conventional hand tool such as a screwdriver that is directly operated by an operator. Therefore, if a structure similar to that of a compression tool equipped with a ratchet mechanism 7, which is a conventionally known hand tool, is adopted as the compression mechanism 43 of the indirect live line compression tool 1A of this embodiment, a mechanism for remotely releasing the engagement between the ratchet teeth 22 and the pawl 26a in the ratchet mechanism 7 is required.

[0036] In consideration of the above circumstances, the indirect live line compression tool 1A according to this embodiment includes a release mechanism 14 as described below as a mechanism for releasing the engagement between the pawl 26a and the ratchet teeth 22 in the ratchet mechanism 7. In other words, the release mechanism 14 of the ratchet mechanism 7 in this embodiment includes a wire 32a that is connected directly or indirectly (for example, via a claw member operating handle 31 shown in FIG. 4) to a claw member 26 having a claw 26a, and a handle 33 provided on the end of the wire 32a that is not connected to the claw member 26, as shown in FIG. 4, for example. In addition, the handle 33 in the release mechanism 14 as described above is positioned near the operating handle (not shown) of the indirect live wire gripping tool 50 used to operate the indirect live wire compression tool 1A in this embodiment, i.e., near the operator's hand.

[0037] Furthermore, if it becomes necessary to open the operating parts 2, 2' for some reason during the compression operation of the connection sleeve 56 using the indirect live line compression tool 1A of this embodiment, i.e., during the closing operation of the operating parts 2, 2' (closing operation in the direction indicated by symbols Y, Y in Figure 4), the worker (or another worker working together with this worker) can simply pull down the handle 33 of the release mechanism 14 located near the worker's hand (see Figure 5). This operation causes the pawl member 26, which is pivoted to the pawl member operating handle 31 via the pivot shaft 27, to rotate clockwise about the pivot shaft 27 against the compressive force of the return member (return spring 28). This action releases the engagement (locked state) between the sawtooth ratchet teeth 22 and the pawl 26a (pawl member 26), making it possible to open the operating parts 2, 2' (see the direction indicated by the symbol Z in Figures 4 and 5). As a result, the compression operation of the connecting sleeve 56 by the crimping parts 5, 5' of the compression mechanism 43 can be interrupted, and the crimping parts 5, 5' can be separated from the connecting sleeve 56. Therefore, according to the indirect live line compression tool 1A of this embodiment, by being equipped with a ratchet mechanism 7 and its release mechanism 14 as shown in Figures 4 and 5, when the compression mechanism 43 is remotely operated by the indirect live line holding tool 50 to compress the connection sleeve 56, the function of the ratchet mechanism 7 can be utilized to prevent the operating parts 2, 2' from opening unintentionally, and the release mechanism 14 can also be operated to open the operating parts 2, 2' when necessary. Therefore, according to the indirect live wire compression tool 1A according to this embodiment, it is possible to provide a simple and convenient indirect live wire compression tool.

[0038] Here, an example of a more detailed aspect of the ratchet mechanism 7 of the indirect live wire compression tool 1A according to this embodiment will be described with reference to Figs. The ratchet mechanism 7 of the indirect live line compression tool 1A in this embodiment is mainly composed of a ratchet bar 21 having a plurality of ratchet teeth 22 formed in a sawtooth shape on its surface, a part of this ratchet bar 21, a claw member 26 having a claw 26a, and a case member 23 that stores a return spring 28 which is a return member that returns this claw member 26 to an engagement position with the ratchet teeth 22, as shown in Figures 4 and 5. Furthermore, this case member 23 comprises a ratchet bar storage section 23a that stores the other end 21b side of the ratchet bar 21 so that it can slide freely in the central axial direction of the ratchet bar 21, and a pawl member storage section 23b that stores the pawl member 26 and the return spring 28. In addition, in the ratchet mechanism 7 as described above, one end 21a of the ratchet bar 21 is rotatably connected to the operating unit 2' via a pivot shaft 24, and the claw member storage portion 23b of the case member 23 is rotatably connected to the operating unit 2 via a pivot shaft 25. In addition, within the case member 23, the pawl 26a of the pawl member 26 is engaged with the ratchet teeth 22 of the ratchet bar 21. In addition, in the pawl member storage section 23b, the pawl member 26 is fixed so as to be freely rotatable around a pivot shaft 27, and a return spring 28 is connected to this pawl member 26, so that the pawl 26a of the pawl member 26 is constantly biased to engage with the ratchet teeth 22 of the ratchet bar 21.

[0039] 4 and 5, one end of the return spring 28 (pulling spring) is connected to the pawl member 26 via a fixed shaft 30 provided on the pawl member 26, and the other end of the return spring 28 is fixed to the pawl member housing portion 23b via a fixed shaft 29. As a result, the pawl member 26 is constantly biased in the counterclockwise direction around the pivot shaft 27. As a result, the engagement state between the pawl 26a and the ratchet teeth 22 is maintained. That is, by engaging the pawl 26a with the ratchet teeth 22, the other end 21b side of the ratchet bar 21 is restricted from sliding in the direction indicated by the symbol S in Fig. 4. That is, the opening movement of the operating parts 2, 2' (movement in the direction indicated by the symbols Z, Z in Fig. 4) is restricted. 4 and 5, by operating the operating parts 2, 2' to narrow the gap between them, the engagement position between the pawl member 26 and the ratchet teeth 22 moves sequentially toward one end 21a of the ratchet bar 21. In other words, the closing operation of the operating parts 2, 2' (operation in the direction indicated by the symbol Y in FIG. 4) is permitted. In other words, according to the compression mechanism 43 shown in Figures 4 and 5, the ratchet mechanism 7 is provided, which allows the closing operation of the operating parts 2, 2' while regulating the opening operation of the operating parts 2, 2', thereby preventing the crimping parts 5, 5' from unintentionally coming out of the compression position of the connection sleeve 56 during the compression operation of the connection sleeve 56.

[0040] 4 and 5, the release mechanism 14 can be operated as necessary, that is, the handle 33 provided at the lower end of the wire 32a can be pulled downward in the drawing, to rotate the claw member operating handle 31 connected to the wire 32a clockwise around the pivot shaft 27 (see FIG. 5). In response to this operation, the claw member 26 rotates clockwise around the pivot shaft 27 against the restoring force of the return spring 28. As a result, as shown in Fig. 5, the engagement between the pawl 26a of the pawl member 26 and the ratchet teeth 22 is released, and the other end 21b of the ratchet bar 21 is allowed to slide in the direction indicated by the symbol S in Fig. 5. In other words, the opening operation of the operating parts 2, 2' (operation in the direction indicated by the symbols Z, Z in Fig. 4) is allowed. In other words, according to the compression mechanism 43 equipped with the ratchet mechanism 7 and the release mechanism 14 shown in Figures 4 and 5, by operating the release mechanism 14 during the compression operation of the connecting sleeve 56 by the compression mechanism 43, it is possible to release the restriction on the opening operation of the operating parts 2, 2' by the ratchet mechanism 7, thereby allowing the operating parts 2, 2' to be opened. That is, during the compression operation of the connecting sleeve 56 by the compression mechanism 43, the operator can interrupt the compression operation as necessary to separate the crimping portions 5, 5' from the connecting sleeve 56.

[0041] In this embodiment, an example is given of the ratchet teeth 22 being arranged in series on the ratchet bar 21; however, a ratchet mechanism other than that shown in Figures 4 and 5 may be adopted as long as it is capable of restricting unintentional opening of the operating parts 2, 2' during compression of the connection sleeve 56 by the compression mechanism 43 of the indirect live line compression tool 1A of this embodiment, and is configured so that the engagement between the ratchet teeth and the pawl can be easily released by remotely operating the pawl member having the pawl using a release mechanism.

[0042] <1-3-4: Modifications of the release mechanism> Now, a modified example of the release mechanism 14 will be described with reference to FIG. FIG. 6 is an enlarged view of a main portion showing a modified example of the release mechanism in the indirect live-wire compression tool according to the present embodiment. In the release mechanism 14 of the ratchet mechanism 7 shown in Figures 4 and 5 above, the claw member 26 is indirectly operated by operating the claw member operating handle 31 using the wire 32a equipped with the handle 33, but the operating mechanism for the claw member 26 may be other than the above. More specifically, for example, as shown in FIG. 6, a modified release mechanism 14' may be used in which an operating wire 32b is directly connected to the claw member 26 stored in the claw member storage section 23b, and the end of the wire 32b that is not connected to the claw member 26 is led out of the claw member storage section 23b and the operating section 2, and a handle 33 is provided at the end. In addition, the release mechanism 14' according to the modified example may include a pulley 34 for receiving the wire 32b in the vicinity of the wire outlet hole 2c for leading the wire 32b out of the operating unit 2 (optional component). Furthermore, when the pulley 34 is provided, the wire 32b can be prevented from touching the wire guide hole 2c and being damaged.

[0043] Furthermore, when a modified release mechanism 14' as shown in FIG. 6 is provided, the handle 33 connected to the end of the wire 32b that is not connected to the claw member 26 (the end on the lower side of the paper in FIG. 6) can be pulled vertically downward (toward the lower side of the paper) by the operator operating the compression mechanism 43' (or by another operator working together with this operator), thereby rotating the claw member 26 clockwise around the pivot shaft 27 as shown by the dashed line in FIG. 6. As a result, the engagement between the ratchet teeth 22 and the pawl 26a is released, and the other end 21b of the ratchet bar 21 is permitted to slide in the direction indicated by the symbol S. In other words, the opening movement of the operating parts 2, 2' (movement in the direction indicated by the symbol Z in FIG. 4) is permitted. Therefore, according to the compression mechanism 43' equipped with a ratchet mechanism 7 and a release mechanism 14' as shown in Figure 6, by operating the release mechanism 14' during the compression operation of the connecting sleeve 56, the closing operation of the operating parts 2, 2' can be interrupted and the operating parts 2, 2' can be opened. That is, the compression mechanism 43' also provides the same functions and effects as those provided by the compression mechanism 43 shown in FIGS.

[0044] [2-1: Regarding other embodiments of the present invention] Next, an indirect live-wire compression tool according to another embodiment of the present invention (hereinafter simply referred to as "another embodiment") will be described in detail with reference to Figs. 7A to 11. Fig. 7A is a front view showing a state where the crimping part of the indirect live-line compression tool according to another embodiment is closed, and Fig. 7B is a front view showing a state where the crimping part of the indirect live-line compression tool according to another embodiment is open. Fig. 8 is a front view of a compression tool with a release mechanism in the indirect live-line compression tool according to another embodiment. Fig. 9 is a front view of a holder and its related structure in the indirect live-line compression tool according to another embodiment. The same parts as those described in Figs. 1 to 6 are given the same reference numerals, and the description of the configuration is omitted. In the above Figures 1 and 2, an example is given of the case in which the compression mechanism 43 in the indirect live line compression tool 1A of this embodiment is integrally configured with the operating arms 9, 9' and the adapters 11, 11', but the operating arms 9, 9' and the adapters 11, 11' may also be configured to be detachable from the operating parts 2, 2' of the compression mechanism 43.

[0045] More specifically, the indirect live line compression tool 1B of another embodiment is composed of a compression tool 42 (see Figure 9) having the same structure as the compression mechanism 43 (including the ratchet mechanism 7) except for the shapes of the ends 2b, 2b' of the operating parts 2, 2', a release mechanism 14 (see Figure 9) that is directly or indirectly connected to the claw member 26 that constitutes the ratchet mechanism 7 and remotely operates the ratchet mechanism 7, and mounting structures 46, 46' that enable adapters 11, 11' to be connected to the operating parts 2, 2' of the compression tool 42 (see Figures 7A, 7B and 8). The mounting structures 46, 46' in the indirect live-wire crimping tool 1B according to the other embodiment include adapters 11, 11'. The compression tool 42 in the indirect live-wire compression tool 1B according to another embodiment may be a hand-operated compression tool equipped with a conventionally known ratchet mechanism (e.g., a structure similar to that of the ratchet mechanism 7) (optional component). In that case, the release mechanism 14 may be added to the ratchet mechanism of the compression tool.

[0046] Here, the mounting structures 46, 46' of the indirect live-wire compression tool 1B according to another embodiment will be described in detail with reference to FIGS. 7A, 7B, 9, and 10. FIG. Fig. 10 is a cross-sectional view taken along line AA in Fig. 9. In Fig. 10, the operation unit 2 is indicated by a dashed line. The same parts as those shown in Figs. 1 to 9 are given the same reference numerals, and the description of their configurations will be omitted. Furthermore, in Fig. 10, the cross section of the operation unit when the operation unit holder is attached to the operation unit is indicated by a dashed line. 7A, 7B and 9, the mounting structure 46 in the indirect live-line crimping tool 1B according to another embodiment includes a sheath-shaped operating part holder 35 attached so as to sandwich the operating part 2 (see FIG. 8) of the crimping tool 42 from the outside, a fastener (e.g., a bolt 37 and a nut 38; see FIG. 10) for fixing the operating part holder 35 to the operating part 2, an operating arm 9 attached rotatably via a pivot shaft 8 near the end of the operating part holder 35, i.e., on the side (lower side of the drawing) where the crimping part 5 is not arranged when the operating part holder 35 is attached to the crimping tool 42, and an adapter 11 attached rotatably to the operating arm 9 via a pivot shaft 10. The operating part holder 35 is formed with a continuous bore 41 (see FIG. 10) for inserting a fastener such as a bolt 37. Similarly, the mounting structure 46' in the indirect live-line crimping tool 1B according to another embodiment also comprises a sheath-shaped operating part holder 35' attached so as to sandwich the operating part 2' (see FIG. 8) of the crimping tool 42 from the outside, a fastener (e.g., bolt 37 and nut 38) for fixing the operating part holder 35' to the operating part 2', an operating arm 9' attached to the operating part holder 35' rotatably via a pivot shaft 8', and an adapter 11' attached to the operating arm 9' rotatably via a pivot shaft 10'. The operating part holder 35' also has a continuous bore (not shown) for inserting a fastener such as a bolt 37 therethrough.

[0047] Furthermore, in the operation portion holders 35, 35', a notch 36 is formed in a portion that overlaps with the connecting portion of the operation portion 2 or operation portion 2' of the compression tool 42 and the ratchet mechanism 7, if necessary. In this way, by forming the notches 36 in the operating part holders 35, 35', the closing operation (compression operation) or opening operation of the operating parts 2, 2' of the compression tool 42 can be prevented from being hindered by the operating part holders 35, 35'. In addition, instead of forming a notch 36 in the operating unit holder 35, 35', the portion where the operating unit holder 35, 35' overlaps with the connecting portion of the operating unit 2 or the operating unit 2' and the ratchet mechanism 7 may be structured to be partially raised (optional component).

[0048] According to the indirect live line compression tool 1B of the other embodiment described above, in addition to the same actions and effects as the previous indirect live line compression tool 1A, a compression tool which is a hand tool equipped with a conventionally known ratchet mechanism (for example, a structure similar to the ratchet mechanism 7) can be repurposed as the compression tool 42, thereby reducing the manufacturing cost. In addition, according to the indirect live line compression tool 1B of another embodiment, in the unlikely event that a malfunction occurs in the crimping portion 5, 5' of the compression tool 42 or the ratchet mechanism 7, etc., it is sufficient to replace the compression tool 42 and the release mechanism 14, and the mounting structures 46, 46' can be used as is. Alternatively, if the mounting structure 46 and / or the mounting structure 46' in the indirect live wire crimping tool 1B according to the other embodiment is damaged, it is possible to use the other parts as they are by simply replacing the damaged parts. Therefore, according to the indirect live wire compression tool 1B according to the other embodiment, the maintenance costs and running costs during use can be reduced.

[0049] Furthermore, in the mounting structure 46 of the indirect live line compression tool 1B of another embodiment, the attachment position of the fasteners (e.g., bolts 37 and nuts 38) for fixing the operating part holder 35 to the operating part 2 may be closer to the pivot axis 4 based on the position of the case member 23 in the ratchet mechanism 7 (optional component). The reason for this is that when the indirect live-wire compression tool 1B according to the other embodiment is operated using the indirect live-wire gripping tool 50, a force acts on the compression tool 42 to push it vertically upward (upward on the page). Even if the operation part 2 held by the operation part holder 35 is about to come off from the operation part holder 35, the case member 23 can be used as a stopper to prevent the operation part 2 from coming off from the operation part holder 35.

[0050] Alternatively, the attachment position of bolt 37 in operating unit holder 35, 35' may be a portion where the width of operating unit 2 accommodated in the recess of operating unit holder 35, 35' gradually decreases toward ends 2b, 2b', and may be closer to pivot axis 4 from the longitudinal center of operating unit holder 35, 35'. Furthermore, in this case, as shown in FIG. 10, the bolt 37 may be positioned so that the outer surface of the shaft of the bolt 37 passing through the operating unit holder 35, 35' contacts the edge of the operating unit 2 housed in the recess of the operating unit holder 35, 35' (both are optional components). In this case as well, when the indirect live-wire compression tool 1B is operated by the indirect live-wire gripping tool 50, the operation parts 2, 2' held by the operation part holders 35, 35' can be prevented from shifting positions.

[0051] [2-2: Detailed structure of other embodiments] The crimping tool 42 of the indirect live wire crimping tool 1B according to another embodiment may be provided with a clip 15 on the crimping portion 5 or the crimping portion 5' as necessary (optional component). In this case, similarly to the case shown in FIGS. 1 and 2, the clip 15 may be provided integrally with the crimping portion 5 or the crimping portion 5' via a protruding connecting portion 20. As shown in FIG. Alternatively, as shown in Figures 7A, 7B and 9, the clip 15 may be provided via a compression portion holder 39 that is removably attached to the crimping portion 5' (or crimping portion 5) of the crimping tool 42 (optional component).

[0052] Here, the structure for attaching the clip 15 to the crimping tool 42 will be described with reference to FIGS. 7A, 7B, 9 and 11. FIG. Fig. 11 is a cross-sectional view taken along line BB in Fig. 9. In Fig. 11, the crimping portion 5 is indicated by a dashed line. Moreover, the same parts as those shown in Figs. 1 to 10 are given the same reference numerals, and description of their configurations will be omitted. When the clip 15 is provided detachably on the crimping part 5' (or the crimping part 5) of the compression tool 42, for example, as shown in Figures 7A, 7B, 9 and 11, a sheath-shaped compression part holder 39 is attached so as to sandwich the crimping part 5 (or the crimping part 5) from the side not having the compression dies (for example, 6a to 6c, etc.), and the compression part holder 39 is fixed to the crimping part 5 (or the crimping part 5) by a fastener (for example, a bolt 37 and a nut 38; see Figure 11), and a protruding connecting part 20 is provided on the compression part holder 39, and the clip 15 may be attached to the end of the connecting part 20 on the side not fixed to the compression part holder 39 (optional component). Note that the compression part holder 39 is formed with a continuous bore (not shown) for inserting a fastener such as a bolt 37. In this case as well, when the connecting sleeve 56 is compressed by the crimping portions 5, 5' of the compression tool 42, the connecting sleeve 56 can be held in the vicinity of the crimping portions 5, 5' by the clip 15. In this case, the operator does not need to use a separate indirect live-wire gripping tool 50 to hold the connecting sleeve 56 near the crimping portion 5, 5', so that the compression operation of the connecting sleeve 56 can be performed efficiently.

[0053] In addition, when the clip 15 is detachably attached to the crimping portion 5' (or the crimping portion 5) of the indirect live line compression tool 1B of another embodiment using the compression portion holder 39, when the indirect live line compression tool 1B is viewed from the front (see Figures 7A and 7B), a clamping recess (e.g., clamping recess 19a-19c) having a position and shape that matches the curved concave shape of the compression die (e.g., compression dies 6a-6c) formed in the crimping portion 5' (or the crimping portion 5) may be formed in the compression portion holder 39 (optional component). In this case, when the indirect live line compression tool 1B of another embodiment is viewed from the front, the compression section holder 39 is attached to the crimping section 5' (or crimping section 5) while matching the outer line of the compression die (e.g., compression dies 6a to 6c) formed in the crimping section 5' (or crimping section 5) of the compression tool 42 with the outer line of the clamping recess (e.g., clamping recess 19a to 19c) formed in the compression section holder 39, thereby making it possible to maintain a constant attachment position of the compression section holder 39 relative to the crimping section 5' (or crimping section 5). This makes it possible to keep constant the position of the clamping recesses (for example, clamping recesses 19a to 19c) of the clip 15 relative to the compression dies (for example, compression dies 6a to 6c) of the crimping portion 5' (or the crimping portion 5).

[0054] Furthermore, if the position of the clamping recess (e.g., clamping recesses 19a-19c) of clip 15 relative to the compression die (e.g., compression dies 6a-6c) of crimping portion 5' (or crimping portion 5) is not constant, when compressing connecting sleeve 56, it will not be possible to compress the connecting sleeve 56 at the originally intended position with crimping portions 5, 5', which will run the risk of unintentionally deforming (bending, etc.) connecting sleeve 56. Therefore, when the compression portion holder 39 has a notch (e.g., notch 40a to 40c), when the connection sleeve 56 is compressed using the indirect live line compression tool 1B of another embodiment, the crimping portions 5, 5' can be compressed at the originally intended position.

[0055] Furthermore, the attachment positions of the bolts 37 and nuts 38 in the compression section holder 39 may be, for example, as shown in Figures 7 and 7B, closer to the pivot axis 4 in the crimping section 5' (or the crimping section 5), and in a portion where the horizontal width of the crimping section 5' (or the crimping section 5) gradually decreases toward the pivot axis 4 when the compression section holder 39 is viewed in a plane. Furthermore, in this case, it is preferable to position the bolt 37 so that the outer surface of the shaft of the bolt 37 passing through the compression portion holder 39 contacts the edge of the crimping portion 5' (or the crimping portion 5) accommodated within the recess of the compression portion holder 39 (both optional components). In this case as well, when the indirect live-wire compression tool 1B is operated by the indirect live-wire gripping tool 50, the compression portion holder 39 attached to the crimping portion 5' (or the crimping portion 5) can be prevented from shifting position. [Industrial Applicability]

[0056] As described above, the present invention is an indirect live line compression tool that does not require the operation of multiple insulating operating rods during operation and that allows the compression operation to be interrupted as necessary during the compression work of a connection sleeve, and can be used in technical fields related to the maintenance of power transmission equipment, etc. [Explanation of symbols]

[0057] 1A, 1B... Indirect live line compression tool 2, 2'... Operation part 2a, 2a'... Base part 2b, 2b'... End part 2c... Wire outlet hole 3... Pivot shaft 4, 4'... Pivot shaft 5, 5'... Crimping part 6a to 6c... Compression die 7... Ratchet mechanism 8, 8'... Pivot shaft 9, 9'... Operation arm 10, 10'... Pivot shaft 11, 11'... Adapter 12, 12'... Socket 13, 13'... Hooking means 14, 14'... Release mechanism 15... Clip 16, 16'... Clamping part 17... Pivot shaft 18, 18'... Operation knob part 19a to 19c... Clamping recess 20... Connection part 21... Ratchet bar 21a... One end part 21b... Other end part 22... Ratchet teeth 23...Case member 23a...Ratchet bar storage section 23b...Pawl member storage section 24...Pivot shaft 25...Pivot shaft 26...Pawl member 26a...Pawl 27...Pivot shaft 28...Return spring (return member) 29, 30...Fixed shaft 31...Pawl member operation handle 32a, 32b...Wire 33...Handle 34...Pulley 35, 35'...Operation section holder 36...Notch 37...Bolt 38...Nut 39...Compression section holder 40a to 40c...Notch 41...Continuous drilling 42...Compression tool 43, 43'...Compression mechanism 44, 44'...Pivot shaft 45...Connecting plate 46, 46'...Mounting structure 50...Indirect live wire gripping tool (insulated pliers) 51, 51'...Clamping arm 51a, 51a'...Tip 51b...base end portion 52...pivot shaft 53...link member 54...operating rod 55...pivot shaft 56...connecting sleeve 56a, 56b...open end 57, 58...electric wire 59...conductor 60...insulating outer sheath 61, 62...electric wire 63...connecting sleeve 64...compression device 65, 65'...insulating operating rod 66...compression pliers 67...immovable member 68...compression member 69...receiving portion 70...compression portion 71...transmission member 72...traction member 73...ring member 74...hook portion 75, 75'...indirect live wire gripping tool (insulated pliers)

Claims

1. A pair of operation units rotatably connected via a pivot shaft; A crimping unit that performs crimping by a closing operation of the pair of operation units; a ratchet mechanism interposed between the pair of operation parts and configured to prevent the operation parts from opening during a closing movement; A pair of adapters are provided directly or indirectly near the end of the pair of operating parts on the side where the crimping part is not arranged, and enable the operating parts to be individually connected to the pair of tip parts of the indirect live wire gripping tool, The ratchet mechanism includes: Ratchet teeth and a pawl member having a pawl that engages with the ratchet teeth; a return member for returning the pawl member to an engagement position with the ratchet teeth; An indirect live line compression tool, characterized in that it is directly or indirectly connected to the claw member and is provided with a release mechanism that operates the claw member from outside the ratchet mechanism to release the engagement between the claw and the ratchet teeth.

2. The ratchet mechanism includes: a ratchet bar having the ratchet teeth and rotatably connected to one of the operation portions; a case member having a ratchet bar storage section that stores the ratchet bar so as to be slidable in the direction of its central axis and is rotatably connected to the other operation section; 2. The indirect live wire crimping tool according to claim 1, wherein the claw member is housed within the case member and pivotally mounted on the case member so as to be freely rotatable.

3. 3. The indirect live wire crimping tool according to claim 1, further comprising a holder interposed between the operating part and the adapter for holding the operating part.

4. The indirect live-wire compression tool according to claim 1 or 2, further comprising a clip provided directly or indirectly to the crimping portion and holding a connection sleeve.

5. The release mechanism includes: A wire connected directly or indirectly to the claw member; 3. The indirect live wire crimping tool according to claim 1, further comprising a handle provided on an end of the wire that is not connected to the claw member.

Images