Hand device for overhead electric wires

Abstract

To provide a small, lightweight, and simply constructed overhead electric wire hand device used in an indirect live-line method for overhead electric wires. [Solution] The overhead electric wire hand device comprises an openable / closable opening / closing arm 3 provided at the tip of a straight rod-shaped device body 2, and a grip operation lever 4 for opening and closing the opening / closing arm 3 provided at the base end of the device body 2. The device body 2 is in the form of a hollow cylindrical pipe made of insulating material, the opening / closing arm 3 has a pair of arm members 5, 5 that open and close and is provided at the tip end of the device body 2 via an opening / closing mechanism 6, the grip operation lever 4 comprises a fixed lever member 15 attached and fixed to the base end of the device body 2, and a movable lever member 16 hingedly connected to the fixed lever member 15 so as to be openable and closable, and the opening / closing mechanism 6 of the opening / closing arm 3 and the movable lever member 16 of the grip operation lever 4 are drivingly connected to the device body 2 by an operating shaft 20 made of insulating material that is installed inside the device body 2 so as to be able to reciprocate in the axial direction.

Description

[Technical Field]

[0001] The present invention relates to a hand device for overhead electric wires, and more particularly to a hand device for overhead electric wires used for gripping work in indirect live-line construction work in overhead electric wire distribution work. [Background technology]

[0002] Uninterruptible construction work, which involves construction of distribution lines and substations without cutting off the electricity, can minimize the impact on customers' daily lives and business, and is effective for construction work in places that require 24-hour operation, such as factories and offices.

[0003] Direct live-line construction, a type of uninterruptible power supply construction, involves workers wearing insulating protective equipment such as rubber gloves and insulating jackets and working by directly touching electrical wires and equipment carrying electricity. However, even when wearing insulating materials, there is a high risk of electric shock due to human error such as carelessness or fatigue, and there are safety issues, so in recent years the introduction of indirect live-line construction has been becoming mainstream.

[0004] The indirect live-line method is a method of working using special tools without directly touching electrical equipment, allowing workers to maintain a safe distance from the equipment and reducing the risk of electric shock.

[0005] Conventionally, well-known specialized tools include hot sticks (insulated operating rods) and insulated pliers, which have various tools attached to the tip, as disclosed in Patent Document 1. However, further technical improvements were required to enable the widespread adoption of indirect live-line construction methods. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 7-222317 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in consideration of such conventional demands, and its purpose is to provide a small, lightweight, and simple overhead electric wire hand device for use in gripping work in indirect live-line overhead electric wire construction methods. [Means for solving the problem]

[0008] The overhead electric wire hand device of the present invention is a device used for gripping work in the indirect live-line construction method for overhead electric wires, and comprises a straight rod-shaped device body having a predetermined length, a handle that can be opened and closed at the tip, and a grip operation unit that opens and closes the handle at the base end of the device body. The device body is in the form of a hollow cylindrical pipe made of insulating material, and the handle is in the form of an opening and closing arm with a pair of arm members that can be opened and closed and are attached to the tip end of the device body via an opening and closing mechanism. The grip operation unit is in the form of a grip operation lever consisting of a fixed lever member attached and fixed to the base end of the device body and a movable lever member hinged to the fixed lever member so that it can be opened and closed, and the opening and closing mechanism of the handle and the movable lever member of the grip operation lever are driven and connected by an operating shaft made of insulating material that is installed inside the device body so that it can move back and forth in the axial direction of the device body.

[0009] As a preferred embodiment, the following configuration is adopted. (1) The movable lever member of the grip operation lever is engaged and connected to the base end of the operating shaft at an intermediate portion between its tip end and the hinged base end so as to be able to tilt, and the movable lever member and fixed lever member are resiliently biased in directions away from each other by a compression spring. The opening / closing mechanism of the grip part is drivingly connected to the tip end of the operating shaft, and by gripping the grip operation lever, the opening / closing mechanism is driven via the operating shaft, causing the opening / closing arm to open and close.

[0010] (2) In the gripping portion, the pair of arm members each comprise an outer spring member having its base end attached and fixed to the tip of the device main body, and an inner spring member having its base end attached and fixed to the tip of the operating shaft, with their tip ends fixed together, and the inner spring members of the pair of arm members are arranged in a state where they widen from their base end side toward their tip end side to form the opening / closing arm, and the opening / closing mechanism is formed by a connection structure between the outer arm member and inner arm member of the pair of arm members and the device main body and the operating shaft to which these outer and inner arm members are respectively attached and fixed, and the opening / closing arm opens and closes as the device main body and the operating shaft move relative to each other in the axial direction.

[0011] (3) In the gripping portion, the pair of arm members are composed of a fixed arm member whose base end is fixedly attached to the tip of the device body, and a movable arm member attached to the fixed arm member so as to be able to open and close, and the base end of the movable arm member is hinged to the base end of the fixed arm member, and a link member formed to extend integrally from this hinge connection portion is pivotally connected to the tip of the operating shaft, so that the device body and the operating shaft move relatively in the axial direction, thereby causing the opening and closing arm to open and close. [Effects of the Invention]

[0012] The overhead electric wire hand device of the present invention has the unique effects listed below, and can provide a small, lightweight, and simple overhead electric wire hand device for use in gripping operations in indirect live-line overhead electric wire construction methods.

[0013] (1) A gripping portion in the form of an openable / closeable opening / closing arm is provided at the tip of a straight rod-shaped device body made of insulating material, and a grip operating portion in the form of a grip operating lever for opening and closing the opening / closing arm is provided at the base end of the device body. By gripping and operating this grip operating lever, the opening / closing arm provided at the tip of the device body opens and closes.

[0014] Therefore, by supporting the device body with one hand and gripping and operating the gripping lever with the other hand, it is possible to grasp and remove objects that are caught on overhead power lines, such as tree branches, kites, fishing lines, vinyl, and other foreign objects.

[0015] (2) The device body is in the form of a hollow cylindrical pipe made of insulating material, and an operating shaft made of insulating material is installed inside this device body so that it can move back and forth in the axial direction. The opening / closing arm (grip portion) at the tip of the device body and the grip operation lever (grip operation portion) at the base end of the device body are driven and connected by the operating shaft, so that the opening / closing arm and the grip operation lever are electrically insulated from each other.

[0016] Therefore, even if the opening / closing arm comes into contact with an object hanging on an overhead power line carrying high-voltage electricity, the worker can maintain a safe distance without directly touching the overhead power line, significantly reducing the risk of electric shock, etc.

[0017] (3) The device body is in the form of a hollow cylindrical pipe, and an operating shaft is installed inside the device body so that it can move back and forth in the axial direction. The opening / closing arm at the tip of the device body and the grip operating lever at the base end of the device body are driven and connected by the operating shaft. Therefore, the structure is simple and lightweight, and the overhead electric wire hand device of the present invention can be held in both hands with little load on the worker. In addition, the operation during gripping work is simple, easy to handle, and allows for safe gripping work. [Brief explanation of the drawings]

[0018] [Figure 1] 1A and 1B show the overall configuration of a hand device for overhead electric wires according to a first embodiment of the present invention, with FIG. 1A being a front view and FIG. 1B being a plan view. [Figure 2] 3 is an enlarged plan view showing a partial cross section of a gripping portion of the overhead electric wire hand device. FIG. [Figure 3] 3 is an enlarged front view showing a partial cross section of a grip operation portion of the overhead electric wire hand device. FIG. [Figure 4]The figure shows the connection structure between the movable lever member and the connecting rod of the operating shaft in the grip operation part, with Figure 4(a) being a front view showing the method of connecting the movable lever member and the connecting rod in the connection structure, and Figure 4(b) being a side view of the same. [Figure 5] 10 is an enlarged plan view, partially in cross section, showing a gripping portion of a hand device for overhead electric wires, which is a second embodiment of the present invention. FIG. [Figure 6] 10 is an enlarged plan view, partially in cross section, showing a gripping portion of a hand device for overhead electric wires, which is a third embodiment of the present invention. FIG. [Figure 7] 10 is an enlarged plan view, partially in cross section, showing a gripping portion of a hand device for overhead electric wires, which is a fourth embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in which like reference numerals denote like components or elements throughout the drawings.

[0020] The overhead electric wire hand device of the present invention is shown in Figures 1 to 4. Specifically, this overhead electric wire hand device 1 is a device used for gripping work in the indirect live-line method in overhead electric wire distribution work. As shown in Figure 1, an openable and closable gripping section 3 is provided at the tip end 2a of a straight rod-shaped device main body 2 having a predetermined length, and a gripping operation section 4 for opening and closing the gripping section 3 is provided at the base end 2b of the device main body 2. The overhead electric wire hand device 1 of this embodiment has a total length set to a predetermined length of approximately 2m to 2.5m.

[0021] The device body 2 is in the form of a hollow cylindrical pipe made of an insulating material, and in the illustrated embodiment, a lightweight and highly strong hollow pipe made of FRP is used.

[0022] Inside the device main body 2, an operating shaft 20 (described later) is installed so as to be capable of reciprocating in the axial direction of the device main body 2. Like the device main body 2, this operating shaft 20 is in the form of a hollow cylindrical pipe made of an insulating material, and in the illustrated embodiment, a lightweight, highly strong hollow pipe made of FRP is used to reduce weight.

[0023] The gripping portion 3 grips an object to be removed, removed and collected that is hung on an overhead electric wire or the like, and specifically, is in the form of an opening and closing arm as shown in FIG.

[0024] The opening / closing arm (gripping portion) 3 in the illustrated embodiment has a pair of arm members 5, 5 that open and close and are provided at the tip 2a of the device body 2 via an opening / closing mechanism 6.

[0025] Each of the pair of arm members 5, 5 has a composite spring structure made up of an outer spring member 7 and an inner spring member 8.

[0026] As shown in Figure 2, the composite spring structure consisting of the outer spring member 7 and the inner spring member 8 is such that the outer spring member 7 has its base end 7b attached and fixed to the tip end 2a of the device main body 2 with fixing screws 9, 9, and the inner spring member 8 has its base end 8b attached and fixed to the tip end 20a of the operating shaft 20 with fixing screws 10, 10.

[0027] Specifically, since the operating shaft 20 is in the form of a hollow pipe made of FRP, a connecting member 21 made of an aluminum alloy is integrally fitted and fixed to the tip end 20a of the operating shaft 20, and the base end 8b of the inner spring member 8 is attached and fixed to this connecting member 21 with fixing screws 10. In the illustrated embodiment, the base ends 8b of the inner spring members 8 of the pair of arm members 5 are attached and fixed by being fastened together with fixing screws 10.

[0028] The outer spring member 7 and the inner spring member 8 are fixed at their tip ends 7a, 8a by fastening them together with fixing bolts and nuts 11, thereby forming the arm member 5.

[0029] Furthermore, rubber suction cups 12, 12 are attached and fixed to the inside of the tip ends of both arm members 5, 5 in a facing manner by fastening them together with the fixing bolts and nuts 11, 11, thereby forming the tip gripping portion of the opening / closing arm 3.

[0030] In the illustrated embodiment, the outer spring member 7 and the inner spring member 8 are in the form of leaf springs made of stainless spring steel, and the outer spring member 7 is formed of a leaf spring that is slightly wider and thicker than the inner spring member 8.

[0031] The outer spring member 7 has a side profile that is curved in an outwardly convex arc shape, and the inner spring member 8 has a linear side profile.

[0032] The pair of arm members 5, 5, which have a composite spring structure consisting of an outer spring member 7 and an inner spring member 8, are arranged such that the inner spring members 8, 8 are flared from their base ends toward their tip ends, thereby forming the opening / closing arm (gripping portion) 3.

[0033] The opening / closing mechanism 6 that opens and closes the opening / closing arm 3 is composed of a combined structure including the interconnection of the outer and inner arm members 8, 8 of a pair of arm members 5, 5, the interconnection of the outer arm member 7 and the device main body 2, and the interconnection of the inner arm member 8 and the operating shaft 20.

[0034] The opening / closing mechanism 6 configured in this manner is drivingly connected to the tip end 20a of the operating shaft 20, and causes the opening / closing arm (gripping portion) 3 to perform opening and closing operations.

[0035] Specifically, referring to FIG. 2, the device main body 2 and the operating shaft 20 move relatively in the axial direction, whereby the opening / closing mechanism 6 opens and closes the opening / closing arm 3.

[0036] In other words, in Figure 2, when the operating shaft 20 moves backward (to the right in the drawing) relative to the device main body 2, the inner arm members 8, 8 attached and fixed to the operating shaft 20 are pulled into the device main body 2, while the outer arm members 7, 7 are attached and fixed to the device main body 2, so the pulling force of the inner arm members 8, 8 causes the outer arm members 7, 7 to elastically deform inward, which in turn causes the pair of arm members 5, 5 to elastically deform inward, resulting in the opening / closing arm 3 performing a closing operation (gripping operation).

[0037] Conversely, when the operating shaft 20 moves forward (to the left in the drawing) relative to the device main body 2 from the closing operation state of the opening / closing arm 3, the outer arm members 7, 7, which have released the retracting force of the inner arm members 8, 8, exert an elastic return force outward, causing the pair of arm members 5, 5 to elastically return outward, and the opening / closing arm 3 performs an opening operation.

[0038] The grip operation part 4 opens and closes the grip part 3, and specifically, is in the form of a grip operation lever as shown in FIG.

[0039] The grip operation lever (grip operation portion) 4 of the illustrated embodiment comprises a fixed lever member 15 and a movable lever member 16 provided at the base end portion 2b of the device body 2 as main components.

[0040] Specifically, the fixed lever member 15 and the movable lever member 16 are plastic molded products. The fixed lever member 15 has its mounting portion 15a fitted and fixed to the base end portion 2b of the device main body 2, and is integrally attached and fixed to the device main body 2, while the movable lever member 16 is hingedly connected to the fixed lever member 15 by a hinge 17 so as to be capable of opening and closing, thereby forming the grip operation lever 4.

[0041] The movable lever member 16 has its base end 16b hinged 17 to the fixed lever member 15 so as to be able to open and close, and an intermediate portion 16c between the hinged base end 16b and the tip end 16a is engaged and connected to the base end 20b of the operating shaft 20 so as to be able to tilt, and the movable lever member 16 and the fixed lever member 15 are resiliently biased in directions away from each other by a compression spring 22.

[0042] Specifically, the movable lever member 16 and the base end 20b of the operating shaft 20 are engaged and connected in such a way that, since the operating shaft 20 is in the form of a hollow pipe made of FRP, an aluminum alloy connecting member 23 is fitted and fixed integrally to the base end 20b of the operating shaft 20, and a stainless steel connecting shaft 24 is threadedly fixed to the connecting member 23 coaxially with the operating shaft 20.

[0043] A short cylindrical engaging roller 24a is integrally formed at the tip of the connecting shaft 24 (Figure 4(a)), and this engaging roller 24a engages with a short cylindrical engaging hole 25 provided in the middle part 16c of the movable lever member 16, thereby connecting the connecting shaft 24 to the movable lever member 16 in a tiltable manner.

[0044] In this regard, as shown in FIG. 4, the surrounding structure of the engagement hole 25 of the movable lever member 16 has an insertion portion 26 for engaging and disengaging the engagement roller 24a of the connecting shaft 24 with the engagement hole 25, and a tilting space 27 in which the connecting shaft 24 tilts when the engagement roller 24a is engaged with the engagement hole 25.

[0045] Then, the connecting shaft 24 is positioned so that the engaging roller 24a of the connecting shaft 24 corresponds to the engaging hole 25 of the movable lever member 16 and so that the connecting shaft 24 corresponds to the insertion portion 26 (see the two-dot chain lines in Figures 4(b) and 4(c)).With the connecting shaft 24 in this position, the connecting shaft 24 is inserted into the movable lever member 16 and the engaging roller 24a is inserted into the engaging hole 25.Then, the connecting shaft 24 is tilted (see the solid lines in Figures 4(b) and 4(c)), so that the connecting shaft 24 is connected to the movable lever member 16 in a tiltable manner.

[0046] By connecting the connecting shaft 24 connected to the movable lever member 16 in this manner to the connecting member 23 of the operating shaft 20, the movable lever member 16 of the grip operation lever 4 and the operating shaft 20 are engaged and connected so as to be able to tilt.

[0047] As a result, the opening / closing mechanism 6 of the opening / closing arm (grip portion) 3 and the movable lever member 16 of the grip operation lever (grip operation portion) 4 are drivingly connected to the device main body 2 by an operating shaft 20 that is built in so as to be able to move back and forth in the axial direction of the device main body 2.

[0048] Specifically, by gripping and operating the grip operation lever 4 (gripping it with the fingers), the operating shaft 20 connected to the movable lever member 16 moves rearward within the device main body 2, and the opening / closing mechanism 6 of the opening / closing arm 3, which is drivingly connected to this operating shaft 20, is driven to close as described above, whereby the pair of arm members 5, 5 elastically deform inward, and the opening / closing arm 3 performs a closing operation (gripping operation).

[0049] Conversely, when the gripping operation of the grip operation lever 4 is stopped (the gripping by the fingers is stopped) from the closing operation state of the opening / closing arm 3, the elastic return force of the compression spring 22 causes the movable lever member 16 to release, and the operating shaft 20 moves forward within the device main body 2, whereby the opening / closing mechanism 6 is released as described above, the pair of arm members 5, 5 elastically return outward, and the opening / closing arm 3 performs an opening operation.

[0050] Due to the basic structure of the grip operation lever 4 and the opening / closing mechanism 6, the opening / closing arm 3 will automatically open when the grip operation of the grip operation lever 4 is released, and therefore, for example, in order to maintain the closed state in which the object to be grasped is grasped, a closure ring member 28 is attached to the tip of the fixed lever member 15. Then, when the grip operation lever 4 is in the grip operation state (closed state), the closure ring member 28 is engaged with an engaging projection 29 on the tip 16a of the movable lever member 16, thereby maintaining the grip operation state of the grip operation lever 4.

[0051] The gripping work in the indirect live-line construction method using the overhead electric wire hand device 1 configured as above is performed by a worker riding in the bucket of a vehicle for high-altitude work, although this is not specifically shown.

[0052] In this case, since the overhead electric wire hand device 1 is small, lightweight, and has a simple structure, the worker can support the device main body 2 with one hand while grasping and operating the gripping operation lever 4 with the other hand to grasp and remove objects caught on the overhead electric wire, such as tree branches, kites, fishing line, vinyl, and other foreign objects, with the opening and closing arm 3.

[0053] As described above in detail, the overhead electric wire hand device 1 of this embodiment provides the following unique effects.

[0054] (a) An openable / closable opening / closing arm 3 is provided at the tip 2a of a straight rod-shaped device main body 2 made of an insulating material, and a grip operation lever 4 for opening and closing the opening / closing arm 3 is provided at the base end 2b of the device main body 2. By gripping and operating this grip operation lever 4, the opening / closing arm 3 opens and closes.

[0055] Therefore, by supporting the device main body 2 with one hand and gripping and operating the gripping lever 4 with the other hand, it is possible to grasp and remove an object that is hanging on an overhead electric wire, such as a tree branch, a kite, a fishing line, or a foreign object such as vinyl.

[0056] (b) The device main body 2 is in the form of a hollow cylindrical pipe made of an insulating material, and an operating shaft 20 made of an insulating material is installed inside this device main body 2 so that it can reciprocate in the axial direction. The opening / closing arm 3 at the tip end 2a of the device main body 2 and the grip operation lever 4 at the base end 2b of the device main body 2 are drivingly connected by the operating shaft 20, so that the opening / closing arm 3 and the grip operation lever 4 are electrically insulated from each other.

[0057] Therefore, even if the opening / closing arm 3 comes into contact with an object hanging on an overhead electric wire carrying high-voltage electricity, the worker can maintain a safe distance without directly touching the overhead electric wire, significantly reducing the risk of electric shock, etc.

[0058] (c) The device main body 2 is in the form of a hollow cylindrical pipe, and an operating shaft 20 is installed inside this device main body 2 so that it can move back and forth in the axial direction. The opening / closing arm at the tip end 2a of the device main body 2 and the grip operation lever 4 at the base end 2b of the device main body 2 are drivingly connected by the operating shaft 20. Therefore, the structure is simple and lightweight, and the overhead electric wire hand device 1 of this embodiment can be held in both hands with little load on the worker. In addition, the operation during gripping work is simple, easy to handle, and safe gripping work can be performed.

[0059] Embodiment 2 This embodiment is shown in FIG. 5, and only the structure of the grip portion 3 provided at the tip portion 2a of the device body 2 of the first embodiment is modified.

[0060] That is, the gripping portion 3 of this embodiment is in the form of an open / close arm as shown in FIG.

[0061] The opening / closing arm (gripping portion) 3 in the illustrated embodiment has a pair of arm members 35 and 36 that open and close and are provided at the tip 2a of the device body 2 via an opening / closing mechanism 37.

[0062] Specifically, one of the pair of arm members 35, 36 is a fixed arm member 35 having its base end 35b fixed to the tip end 2a of the device main body 2, and the other is a movable arm member 36 attached to the fixed arm member 35 in an openable and closable manner.

[0063] The fixed arm member 35 has its base end 35b attached and fixed to the tip end 2a of the device main body 2 by means of fixing screws 38, 38, . . .

[0064] The base end portion 36b of the movable arm member 36 is hinged 39 to a portion near the base end of the fixed arm member 35, and a link member 40 formed integrally extending from the hinged portion 39 is pivotally connected to the tip end portion 20a of the operating shaft 20.

[0065] Specifically, the tip end 20a of the operating shaft 20 is formed by integrally fitting and fixing an aluminum alloy connecting member 21 to the operating shaft 20, and a link member 40 of the movable arm member 36 is hingedly connected 41 to a connecting portion 21a integrally protruding from the connecting member 21.

[0066] The fixed arm member 35 and the movable arm member 36 are made of an aluminum alloy and have a side profile that is curved in an outwardly convex arc shape as shown in the figure, and their inner portions 35c, 36c are formed in a sawtooth shape as shown in the figure, thereby forming the opening / closing arm (gripping portion) 3.

[0067] The distal ends of both the arm members 35, 36 are covered with plastic cover members 42, 42, which form the distal end gripping portion of the opening / closing arm 3.

[0068] The opening / closing mechanism 37 that opens and closes the opening / closing arm 3 is composed of a combined structure including the interconnection of fixed and movable arm members 35, 36, the interconnection of the fixed arm member 35 and the device main body 2, and the interconnection of the movable arm member 36 and the operating shaft 20.

[0069] The opening / closing mechanism 37 configured in this manner is connected to the tip end 20a of the operating shaft 20, and causes the opening / closing arm 3 to open and close.

[0070] Specifically, the device body 2 and the operating shaft 20 move relatively in the axial direction, whereby the opening / closing mechanism 37 opens and closes the opening / closing arm 3 .

[0071] The overhead power line hand device 1 configured as described above has a small, lightweight, and simple structure, similar to embodiment 1, and the worker can support the device main body 2 with one hand while grasping and operating the grip operating lever 4 (Figure 3) with the other hand to grasp and remove an object caught on the overhead power line with the opening / closing arm 3. Other configurations and operations are the same as those of the first embodiment.

[0072] Embodiment 3 This embodiment is shown in FIG. 6, and similar to the second embodiment, only the structure of the grip portion 3 provided at the tip portion 2a of the device body 2 of the first embodiment is modified.

[0073] That is, the gripping portion 3 of this embodiment is in the form of an open / close arm as shown in FIG.

[0074] The opening / closing arm (gripping portion) 3 in the illustrated embodiment has a pair of arm members 45 and 46 that open and close and are provided at the tip 2a of the device body 2 via an opening / closing mechanism 47.

[0075] Specifically, one of the pair of arm members 45, 46 is a fixed arm member 45 having its base end 45b fixed to the tip end 2a of the device main body 2, and the other is a movable arm member 46 attached to the fixed arm member 45 in an openable and closable manner.

[0076] The fixed arm member 45 has a base end 45b attached and fixed to the inner peripheral surface of the tip end 2a of the device main body 2 by means of fixing screws 48, 48.

[0077] The base end portion 46b of the movable arm member 46 is hinged 49 to a portion near the base end of the fixed arm member 45, and a link member 50 formed integrally extending from the hinged portion 49 is pivotally connected to the tip end portion 20a of the operating shaft 20.

[0078] Specifically, the tip end 20a of the operating shaft 20 is formed by integrally fitting and fixing an aluminum alloy connecting member 21 to the operating shaft 20, and a link member 50 of the movable arm member 46 is hingedly connected 51 to a connecting portion 21a integrally protruding from the connecting member 21.

[0079] The fixed arm member 45 and the movable arm member 46 are made of aluminum alloy as in the second embodiment, and have a side profile that extends linearly as shown in the figure, with their inner portions 45c, 46c formed in a sawtooth shape, thereby forming the opening / closing arm 3.

[0080] The opening / closing mechanism 47 that opens and closes the opening / closing arm 3 is composed of a combined structure including the interconnection of fixed and movable arm members 45, 46, the interconnection of the fixed arm member 45 and the device main body 2, and the interconnection of the movable arm member 46 and the operating shaft 20.

[0081] The opening / closing mechanism 47 configured in this manner is connected to the tip end 20a of the operating shaft 20, and causes the opening / closing arm 3 to perform opening and closing operations.

[0082] Specifically, the device body 2 and the operating shaft 20 move relatively in the axial direction, whereby the opening / closing mechanism 47 opens and closes the opening / closing arm 3 .

[0083] The overhead power line hand device 1 configured as described above has a small, lightweight, and simple structure, similar to embodiment 1, and the worker can support the device main body 2 with one hand while grasping and operating the grip operating lever 4 (Figure 3) with the other hand to grasp and remove an object caught on the overhead power line with the opening / closing arm 3.

[0084] In this case, the inner portions 45c, 46c of the fixed side and movable side arm members 45, 46 are formed in a sawtooth shape extending in a straight line as shown in the figure, so that when the opening / closing arm 3 is closed, the sawtooth-shaped inner portions 45c, 46c abut against each other, so that in addition to the above-mentioned gripping operation, simple cutting operation of the object can also be performed. Other configurations and operations are the same as those of the first embodiment.

[0085] Embodiment 4 This embodiment is shown in FIG. 7, and similar to the second and third embodiments, only the structure of the grip portion 3 provided at the tip portion 2a of the device body 2 of the first embodiment is modified.

[0086] That is, the gripping portion 3 of this embodiment is in the form of an open / close arm as shown in FIG.

[0087] The opening / closing arm (gripping portion) 3 in the illustrated embodiment has a pair of arm members 55 and 56 that open and close and are provided at the tip 2a of the device body 2 via an opening / closing mechanism 57.

[0088] Specifically, one of the pair of arm members 55, 56 is a fixed arm member 55 having its base end 55b fixed to the tip end 2a of the device main body 2, and the other is a movable arm member 56 attached to the fixed arm member 55 in an openable and closable manner.

[0089] The fixed arm member 55 has a base end 55b attached and fixed by fixing screws 58, 58 to a fixing portion 60 provided integrally with the tip end 2a of the device main body 2.

[0090] The movable arm member 56 has an intermediate portion connected to an intermediate portion of the fixed arm member 55 by a hinge 59, and has a base end portion 56b pivotally connected to the tip portion 20a of the operating shaft 20.

[0091] Specifically, a stainless steel connecting member 21 is integrally attached and fixed to the tip end 20a of the operating shaft 20 with fixing screws 62, 62, and the base end 56b of the movable arm member 56 is hinge-connected 61 to the connecting portion 21a of this connecting member 21.

[0092] The fixed arm member 55 and the movable arm member 56 are made of stainless steel and are formed with a side profile that is curved in an outward convex arc as shown in the figure, thereby constituting the opening / closing arm (gripping portion) 3.

[0093] The distal ends of both the arm members 55 and 56 are covered with plastic cover members 63 and 63, which form the distal end gripping portion of the opening / closing arm 3.

[0094] The opening / closing mechanism 57 that opens and closes the opening / closing arm 3 is composed of a combined structure including the interconnection of fixed and movable arm members 55, 56, the interconnection of the fixed arm member 55 and the device main body 2, and the interconnection of the movable arm member 56 and the operating shaft 20.

[0095] The opening / closing mechanism 57 configured in this manner is drivingly connected to the tip end 20a of the operating shaft 20, and causes the opening / closing arm 3 to perform opening and closing operations.

[0096] Specifically, as the device main body 2 and the operating shaft 20 move relative to each other in the axial direction, the opening / closing mechanism 57 opens and closes the movable arm member 56 relative to the fixed arm member 55, thereby opening and closing the opening / closing arm 3.

[0097] The overhead power line hand device 1 configured as described above has a small, lightweight, and simple structure, similar to embodiment 1, and the worker can support the device main body 2 with one hand while grasping and operating the grip operating lever 4 (Figure 3) with the other hand to grasp and remove an object caught on the overhead power line with the opening / closing arm 3. Other configurations and operations are the same as those of the first embodiment.

[0098] It should be noted that the above-mentioned embodiments 1 to 4 merely show preferred embodiments of the present invention, and the present invention is not limited to these embodiments. Various design modifications are possible within the scope of the present invention, for example, modifications as described below are possible.

[0099] (1) The specific structure of the overhead electric wire hand device 1 can be modified to other structures having similar functions, and in particular, the specific structures of the main components, namely the device body 2, the opening / closing arm (gripping portion) 3, the grip operating lever (grip operating portion) 4, and the opening / closing mechanism 6, are not limited to those shown in the figure as long as they have similar functions.

[0100] (2) In the illustrated embodiment, the device body 2 of the overhead electric wire hand device 1 is structured to have a predetermined fixed length. However, although not specifically shown, it is also possible to configure the device body 2 to have, for example, a Tescopic structure, so that the device body 2 can be adjusted to extend or retract as needed.

[0101] (3) The overhead electric wire hand device 1 of the present invention is a device used for gripping work in the indirect live-line method in overhead electric wire distribution work, but it can also be effectively used for other remote-controlled work, such as a fallen object capture device for capturing objects that have fallen onto the tracks from a railway platform or other location where it is dangerous for a human to directly go and pick them up by hand. [Explanation of symbols]

[0102] 1. Hand device for overhead electric wires 2. Device body 2a Tip of the device body 2b Base end of device body 3 Opening and closing arm (gripping part) 4 Grip operation lever (grip operation part) 5 Arm member 6 Opening and closing mechanism 7 Outer spring member 8 Inner spring member 15 Fixed lever member 16 Movable lever member 17 Hinge Joint 20 Operating shaft 20a Tip of the operating shaft 20b Base end of operating shaft 22 compression spring 35 Fixed arm member 36 Movable arm member 37 Opening and closing mechanism 39 Hinge Joint 40 Link member 45 Fixed arm member 46 Movable arm member 47 Opening and closing mechanism 49 Hinge Joint 50 Link member

Claims

1. A device used for gripping work in the indirect live-line method for overhead electric wires, The device has a rod-like body having a predetermined length, and an openable / closable gripping portion is provided at the tip end of the body, and a gripping operation portion for opening and closing the gripping portion is provided at the base end of the body, the device body is in the form of a hollow cylindrical pipe made of insulating material; the gripping portion is in the form of an opening / closing arm in which a pair of arm members that open and close are provided at the tip of the device body via an opening / closing mechanism, the grip operation portion is in the form of a grip operation lever including a fixed lever member attached and fixed to the base end of the device body, and a movable lever member hingedly connected to the fixed lever member so as to be capable of opening and closing; The opening and closing mechanism of the gripping portion and the movable lever member of the grip operation lever are drivably connected by an operating shaft made of an insulating material that is installed inside the device body so as to be capable of reciprocating in the axial direction of the device body. A hand device for overhead electric wires.

2. The movable lever member of the grip operation lever is engaged and connected to the base end of the actuation shaft at an intermediate portion between its tip end and the hinged base end so as to be able to tilt, and the movable lever member and the fixed lever member are resiliently biased in directions away from each other by a compression spring, the opening / closing mechanism of the gripping portion is drivably connected to the tip end of the actuation shaft, By gripping the grip operation lever, the opening / closing mechanism is driven via the operating shaft, and the opening / closing arm is configured to perform opening and closing operations.

2. The overhead electric wire hand device according to claim 1.

3. In the gripping portion, the pair of arm members each comprise an outer spring member whose base end is attached and fixed to the tip end portion of the device body, and an inner spring member whose base end is attached and fixed to the tip end portion of the operating shaft, with the tip ends fixed together, and the inner spring members of the pair of arm members are arranged in a state where they widen from their base end side toward their tip end side, thereby forming the opening and closing arm, the opening / closing mechanism is constituted by a connection structure between the outer arm member and the inner arm member of the pair of arm members, and the device main body and the operating shaft that respectively attach and fix these outer and inner arm members, The opening / closing arm is configured to open and close by the relative movement of the device body and the operating shaft in the axial direction.

2. The overhead electric wire hand device according to claim 1.

4. In the gripping portion, the pair of arm members are composed of a fixed arm member whose base end is fixed to a tip end of the device body, and a movable arm member that is attached to the fixed arm member so as to be able to open and close, a base end portion of the movable arm member is hingedly connected to a base end portion of the fixed arm member, and a link member formed integrally extending from the hinged portion is pivotally connected to a tip end portion of the operating shaft; The opening / closing arm is configured to open and close by the relative movement of the device body and the operating shaft in the axial direction.

2. The overhead electric wire hand device according to claim 1.

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