JP5878192B2 - Indirect hot wire gripping tool - Google Patents

Description

  The present invention is for gripping an overhead electric wire or the like with a fixed gripping portion of the head portion and a movable gripping portion that is close to the fixed gripping portion, and prevents the movable gripping portion from being inadvertently separated from the fixed gripping portion. The present invention relates to an indirect hot wire gripping tool provided with a lock mechanism for the head portion.

  As a tool for gripping a gripped portion such as a high-voltage overhead wire in a live state, for example, an indirect live-line gripping tool (also referred to as a straight ring tongue) shown in Patent Document 1, Patent Document 2, or the like is used. .

  Among these, the indirect hot wire gripping tool disclosed in Patent Document 1 is connected to a rotation conversion mechanism having a first bevel gear and a second bevel gear meshed with the first bevel gear, and the first bevel gear. And a drive shaft connected to the second bevel gear via an output shaft. The drive shaft is further supported by the operating rod so as to be rotatable in the axial direction of the operating rod. Thereby, by turning the handle of the operation part, the movable gripping part moves in a direction approaching the fixed gripping part. The lock mechanism is provided in the vicinity of the handle of the operation unit, and has a structure for locking and unlocking so that the handle does not rotate.

  In addition, in the indirect hot wire gripping tool of Patent Document 2, a circular gear member is formed on a head portion having a fixed gripping portion, and a movable gripping portion is fixedly gripped on the side of the end of the insulating operation rod facing the circular gear member. A lock mechanism that can lock or unlock the movement away from the unit is attached. An operation mechanism for locking and releasing the lock mechanism is disposed along the longitudinal direction of the insulating operation rod.

JP 2009-5427 A JP 2009-23579 A

  However, the lock mechanism provided in the indirect hot wire gripping tool of Patent Document 1 is not provided in the head portion having the fixed gripping portion. That is, as described above, the lock mechanism provided in the indirect hot-line gripping tool of Patent Document 1 is provided at a position close to the handle of the operation unit, and locks and unlocks the rotation of the handle. It is. For this reason, the lock mechanism included in the indirect hot wire gripping tool of Patent Document 1 does not have a structure intended to prevent the movable gripping part from being inadvertently separated from the fixed gripping part. In addition, in the structure of the operation unit and the rotation conversion mechanism of the indirect live-line gripping tool disclosed in Patent Document 1, it is considered difficult to sufficiently rotate the drive shaft unless the handle is rotated many times.

Moreover, the lock mechanism with which the indirect hot wire holding | grip tool of patent document 2 is provided is not in the head part which has a fixed holding part, but is provided in the insulated operation rod side. And the rod etc. which connect a grip part and a lock mechanism are arranged outside the insulating operation rod, and the diameter dimension of the rod shown in Patent Document 2 is also thin. For this reason, the rod may be damaged, or the rod may become an obstacle in the rotating operation of the insulating operation rod.

  Therefore, the present invention enables the lock mechanism to be locked and unlocked by the operator by a simple operation while having a configuration in which the lock mechanism is provided in the head portion having the fixed grip portion. It is an object of the present invention to provide an indirect hot wire gripping tool having an operation mechanism in which a member for transmitting an operation to a lock mechanism is not arranged outside.

  The indirect hot-line gripping tool according to the present invention includes a head portion having a fixed grip portion, a movable grip portion that is close to the fixed grip portion and grips an object to be gripped by the fixed grip portion, and the head Insulation that provides a gripping mechanism having a threaded rod penetrating the portion and having the movable gripping portion attached to the tip thereof, and an output for moving the threaded rod toward and away from the fixed gripping portion with respect to the threaded rod An operating rod, a meshing member disposed on the gripping mechanism side of the insulating operating rod and having a plurality of protrusions, and provided on the insulating operating rod side of the head portion and meshing with the protrusions of the meshing member In the indirect hot wire gripping tool provided with a lock mechanism capable of, the insulating operation rod is configured to include an operation rod main body and a shaft core side member disposed on the shaft core side of the operation rod main body, Control rod body and the above The core side member is an operation mechanism that operates locking and unlocking of the lock mechanism, and the operation bar main body is slidable in a direction toward and away from the gripping mechanism along the axial direction of the shaft core side member. When the operating rod main body is slid toward the gripping mechanism, the protrusion of the meshing member and the lock mechanism are engaged with each other, and the movable gripping part is displaced in a direction away from the front fixed gripping part. Is locked, and by sliding the operating rod main body in a direction away from the gripping mechanism, the engagement member is separated from the lock mechanism, and the lock with respect to the displacement of the movable gripping portion is released. Item 1).

  As a result, it is possible to lock the displacement of the movable gripping part in the direction away from the fixed gripping part side by simply sliding the operating bar main body of the insulating control bar along the axial direction of the shaft core side member. It can be released. For this reason, after the movable gripping part is displaced toward the fixed gripping part and the object to be gripped is gripped by the fixed gripping part and the movable gripping part, the indirect live gripping tool is operated with both hands against the lock mechanism. It is possible to perform an operation of locking the movable gripping portion in a direction away from the fixed gripping portion side while maintaining the held state. Accordingly, no other indirect hot tool is required to operate the lock mechanism, and it becomes possible to perform locking and unlocking operations by a simple operation alone.

  In addition, since most of the shaft side member constituting the operation mechanism is accommodated in the operation rod body of the insulated operation rod, the component disposed on the outer surface of the operation rod body of the insulation operation rod with respect to the operation mechanism It can be set as the structure which does not have.

  And in this invention, the said insulation operating rod further has the cylindrical output member which can insert the said screw rod, The screwing part is formed in the internal peripheral surface of the said output member, The said engagement member Is mounted on the operation rod main body and integrated with the operation rod main body, is attached to the shaft core side member so as to be movable along the axial direction of the shaft core side member, and the output member is The shaft core side member is inserted into and fixed to the shaft core side member (claim 2).

  As a result, the output rod rotates integrally with the shaft-side member by rotating the shaft-side member with the insulating operation rod, so that the screw rod moves to the fixed grip portion of the head portion according to the rotation direction of the shaft-side member. Move in the direction of perspective. Therefore, the movable gripping portion provided at the tip of the screw rod is close to the fixed gripping portion, so that the gripping object is gripped by the fixed gripping portion and the movable gripping portion, or the movable gripping portion is separated from the gripped object. be able to.

  Furthermore, in this invention, in order to hold | maintain the position which the said operating rod main body slid to the said holding | grip mechanism side, or the position slid in the direction away from the said holding mechanism, the said operating rod main body is made into the said shaft core side member with a holding member. It can be connected (Claim 3).

  As a result, the operating rod main body inadvertently slides along the axial direction of the shaft core side member to lock the movable gripping part in a direction away from the fixed gripping part unintentionally or release the lock. It will not be done.

  As described above, according to the indirect hot wire gripping tool according to the present invention, the movable gripping portion is fixed to the fixed gripping portion side only by sliding the operation rod main body of the insulating control rod along the axial direction of the shaft core side member. Displacement in the direction away from can be locked or unlocked. For this reason, after the movable gripping part is displaced toward the fixed gripping part and the object to be gripped is gripped by the fixed gripping part and the movable gripping part, the insulating mechanism is held with both hands with respect to the lock mechanism. While maintaining the state, it is possible to perform an operation for locking the movable gripping portion from being displaced in a direction away from the fixed gripping portion side. Accordingly, no other indirect hot tool is required to operate the lock mechanism, and it becomes possible to perform locking and unlocking operations by a simple operation alone.

  In addition, since most of the shaft side member constituting the operation mechanism is accommodated in the operation rod body of the insulated operation rod, the component disposed on the outer surface of the operation rod body of the insulation operation rod with respect to the operation mechanism It can be set as the structure which does not have.

  Particularly, according to the indirect hot wire gripping tool according to the invention of claim 2, since the output rod rotates by rotating the shaft side member with the insulating operation rod, the screw rod follows the rotation direction of the shaft side member. The head moves in a direction closer to the fixed grip portion of the head portion. Therefore, the movable gripping portion provided at the tip of the screw rod is close to the fixed gripping portion, so that the gripping object is gripped by the fixed gripping portion and the movable gripping portion, or the movable gripping portion is separated from the gripped object. be able to.

  In particular, according to the indirect hot-line gripping tool according to the invention of claim 3, the operating rod main body inadvertently slides along the axial direction of the shaft side member, and the movable gripping part unintentionally moves from the fixed gripping part. It is possible to prevent the displacement in the direction away from being locked and to prevent the lock from being released.

FIG. 1A shows a free state in which the movable gripping part is not locked by the lock mechanism in the indirect hot-line gripping tool of the present invention, and FIG. 1B shows a front view of the lock mechanism. 1 (c) shows a holding hole for holding the holding member. FIG. 2 shows a state in which the movable gripping portion is locked by the lock mechanism and the slide widths of the operation rod main body and the meshing member in the indirect hot-line gripping tool of the present invention. Fig.3 (a) is a schematic sectional drawing of the indirect hot wire holding | grip tool of this invention, FIG.3 (b) is an expanded sectional view which shows the structure of a holding member. FIG. 4 (a) is an explanatory view showing a usage example in which an insulating operation rod is rotated in order to bring the movable gripping part close to the fixed gripping part, with the indirect live gripping tool hooked on the overhead line and locked. Fig. 4 (b) shows that the indirect hot wire gripping tool is put on the overhead wire and the lock is released, and in order to separate the movable gripping portion from the fixed gripping portion, the insulating operation rod is placed in the opposite direction to Fig. 4 (a). It is explanatory drawing which shows the usage example made to rotate.

  Hereinafter, an example of the grip tool for indirect live work of the present invention will be described with reference to FIGS. 1 to 3.

  The indirect live wire gripping tool 1 basically includes a gripping mechanism 2 and an insulating operation rod 8. The gripping mechanism 2 includes a head portion 3 having a fixed grip portion 31 at a tip portion, a movable grip portion (also referred to as a jaw; the same applies hereinafter) 4 that can be displaced in a direction far from the fixed grip portion 31, and a movable grip at the tip end. It is comprised with the linear screw rod 5 to which the part 4 was attached. The movable grip portion 4 and the screw rod 5 are connected so as to be integrated by a pin or the like. Then, the movable gripping portion 4 moves closer to the fixed gripping portion 31 by the displacement of the screw rod 5 in the direction of moving forward and backward with respect to the fixed gripping portion 31.

  The base portion 32 of the head portion 3 is provided with a lock mechanism 6 that engages with a projection 86 of a meshing member 85 of the insulating operation rod 8 described below. In the lock mechanism 6, the locking member 61 is biased by a spring 62 (shown in FIG. 3). The locking member 61 is in a state of protruding outward from the base portion 32 of the head portion 3 except that it is pushed by the projection 86 of the engagement member 85 of the insulating operation rod 8 described below.

  The insulating operation bar 8 includes a cylindrical operation bar main body 81, a cylindrical shaft core side member 82, a meshing member 85, and a cylindrical output bar 90. The operation rod main body 81 is a main portion of the outer surface of the insulating operation rod 8 and is provided with an umbrella-shaped limit collar 9. The base end side portion of the operating rod main body 81 with respect to the limit collar 9 has a handle constituting portion 101 that forms a part of the handle portion 10 for an operator to hold by hand. A holding hole 81a through which the holding member 7 is inserted is formed in the handle constituting portion 101 of the operation rod main body 81, and this holding hole has an approximately eight-letter shape. Further, an attachment hole 81 b for attaching the engagement member 85 is formed on the distal end side of the operation rod main body 81.

  The shaft side member 82 protrudes from the handle component 101 of the operation rod main body 81 and the inner component 83 inside the operation rod main body 81, and forms a handle portion with the handle component 101. 102. A holding hole 83a through which the holding member 7 is inserted is formed on the handle portion 102 side of the inner portion 83, and an attachment hole 83b for attaching the meshing member 85 is formed at the tip of the inner portion 83, and the inner portion A fixing hole 83 c for fixing the output rod 90 is formed in the middle of 83. The attachment hole 83 b is a long hole extending in the axial direction of the shaft core side member 82.

  The meshing member 85 is an annular member having a plurality of circumferentially arranged projections 86, and is externally mounted on the operation rod body 81 on the distal end side of the operation rod body 81. It is integrated by fixing with 87. The meshing member 85 is attached to the shaft-side member 82 by inserting a rivet 87 into a long mounting hole 83 b extending in the axial direction of the shaft-side member 82. The meshing member 85 can be displaced with respect to the axial core side member 82 by the longitudinal width of the long hole along the axial direction of the axial core side member 82. In this embodiment, the cover 88 covers the portion of the engagement member 85 where the head of the rivet 87 is exposed and the boundary portion of the operation rod main body 81 with the engagement member 85.

  The output rod 90 is formed with a threaded portion 91 such as a screw thread that can be screwed onto the threaded rod 5 on the inner peripheral surface. The output rod 90 is inserted into the shaft core side member 82 and the shaft core side member 82. The output rod 90 is connected by a pin 92 on the proximal end side.

  As a result, the operating rod main body 81 can slide in both directions along the axial direction of the inner portion 83 on which the operating rod main body 81 is covered, and the protrusion 86 of the meshing member 85 is also close to the lock mechanism 6. Can slide in the same direction with the same slide width. That is, since the slide width W1 of the operating rod main body 81 can be synchronized with the slide width W2 of the protrusion 86 of the engagement member 85, it is recognized how far the protrusion 86 of the engagement member 85 has been slid. It is possible to operate the insulating operation rod 8 while doing so. On the other hand, the full length of the indirect live-line gripping tool 1 may not be expanded and contracted.

  In this embodiment, a reinforcing ring 11 is built in a portion overlapping the shaft core side member 82 in the operation rod main body 81 of the insulation operation rod 8 in order to increase the strength of the insulation operation rod 8. The reinforcing ring 11 is formed with a holding hole 11 a that communicates with the holding hole 81 a of the operation rod main body 81 and the holding hole 83 a of the shaft core side member 82.

  With the above configuration, the handle constituting portion 101 of the operation rod main body 81 and the handle constituting portion 102 of the shaft core side member 82 are held at hand, and the handle constituting portion 101 of the operation rod main body 81 is limited. By sliding to the 9 side, the meshing member 85 is displaced in the direction of the lock mechanism 6. Therefore, the protrusion 86 of the engagement member 85 and the locking member 61 of the lock mechanism 6 are engaged with each other (locked by the lock mechanism 6), and the movable gripper 4 is fixedly gripped as indicated by the arrow in FIG. The insulating operation rod 8 can be prevented from rotating only in the direction in which the portion 31 is approached.

  Then, holding the handle constituting portion 101 of the operating rod main body 81 and the handle constituting portion 102 of the shaft core side member 82 at hand, the handle constituting portion 101 of the operating rod main body 81 is moved away from the limit collar 9. By sliding, the meshing member 85 is also displaced in a direction away from the lock mechanism 6. For this reason, the protrusion 86 of the engagement member 85 and the locking member 61 of the lock mechanism 6 do not engage (the lock mechanism 6 is unlocked), and the movable gripper 4 is moved as shown by the arrow in FIG. The insulating operating rod 8 can be rotated in both directions to move away from the fixed grip portion 31.

  Therefore, it is possible to perform the work of locking and unlocking with the lock mechanism 6 without using other indirect live-line gripping tools and without temporarily separating both hands from the insulating operation rod 8. Become.

  Then, the insulating operation rod 8 can be rotated in both directions for moving the movable gripping portion 4 to and from the fixed gripping portion 31, and conversely, the insulating operation rod in both directions for moving the movable gripping portion 4 to and from the fixed gripping portion 31. In order to maintain the state where 8 cannot be rotated, the holding member 7 is used. The holding member 7 includes a holding member main body 71 composed of a head portion 71a and a screw portion 71b, a coil spring 72 sheathed on the screw portion 71b of the holding member main body 71, a holding hole 81a covering the holding member main body 71 and the coil spring 72. A cross section having an engaging portion 73a that can be engaged with any of the two large diameter portions is constituted by a substantially U-shaped cover 73.

  As a result, the screw portion 71b of the holding member 7 is normally inserted and screwed into the holding hole 11a of the reinforcing ring 11 and the holding hole 83a of the insertion portion 83 of the shaft core side member 82, and the holding member 7 is engaged. Since the portion 73a is engaged with one of the two large diameter portions of the mounting hole 81, the operation rod main body 81 cannot be slid. On the other hand, when the cover 73 of the holding member 7 is pulled, the state in which the engaging portion 73a is engaged with one of the two large-diameter portions of the mounting hole 81 is released, so that the operation rod main body 81 can be slid. It becomes possible. On the other hand, since the coil spring 72 sandwiched between the head 71 a of the holding member main body 71 and the bottom of the cover 73 is compressed, the operating rod main body 81 is slid so that the engaging portion 73 a is connected to the mounting hole 81. When facing the other large-diameter portion from the state facing one large-diameter portion, the engaging portion 73a is engaged with the other large-diameter portion of the attachment hole 81 by the restoring force of the coil spring 72 by separating from the cover 73. The operation rod main body 81 cannot be slid again.

  Based on the configuration of the indirect live wire gripping tool 1 described above, the overhead wire L is sandwiched and gripped by the gripping mechanism 2 of the indirect live wire gripping tool 1 or the movable gripping portion 4 of the gripping mechanism 2 is separated from the overhead wire L. An example of the operation will be described with reference to FIG.

  First, with the lock mechanism 6 unlocked, the head unit 3 is fixed, and the insulating operation rod 8 is rotated to displace the movable gripping part 4 away from the fixed gripping part 31, thereby moving the movable gripping. The distance between the portion 4 and the tip of the fixed grip portion 31 is made wider than the diameter of the overhead line L. Next, holding the handle portion 10 of the indirect live wire gripping tool 1, the head portion 3 is moved so that the overhead line L passes between the movable gripping portion 4 and the fixed gripping portion 31. Then, as shown in FIG. 4A, when the overhead line L comes into contact with the curved inner surface of the fixed grip 31 and the head part 3 is hung on the overhead line L, the head part 3 is fixed. Since the screw rod 5 and the like do not rotate, the movable gripper 4 is moved in the direction indicated by the white arrow in FIG. 4A by rotating the insulating operation rod 8 in a predetermined direction (the arrow direction in FIGS. 2 and 4A). Since the gripping mechanism 2 grips the overhead wire L, the movable gripping portion 4 can be brought close to the fixed gripping portion 31. When gripping the overhead wire L with such a gripping mechanism 2, as shown in FIG. 2 and FIG. 4A, the operating rod body 81 is slid toward the fixed gripping portion 31 and is held by the holding member 7. In this case, it is possible to prevent the movable operating portion 8 from being erroneously rotated in the direction in which the movable gripping portion 4 is separated from the fixed gripping portion 31 by the locking by the locking mechanism 6.

  On the other hand, when it becomes necessary to separate the movable gripping part 4 from the fixed gripping part 31 for some reason during the work of gripping the overhead wire L, as shown in FIG. The main body 81 is slid to the side opposite to the fixed grip portion 31 and is changed to a holding state by the holding member 7. As a result, the lock by the lock mechanism 6 is released, and as shown in FIG. 1, the insulating operation rod 8 can be rotated in both directions, and the movable gripping portion 4 is fixed as shown in the direction of the white arrow in FIG. It becomes possible to displace in both directions close to the grip portion 31. However, as shown in FIG. 4B, the movable gripper 4 is moved by rotating the insulating operation rod 8 in a direction opposite to the predetermined direction (a direction opposite to the arrow direction in FIG. 4A). It is possible to displace the movable gripping portion 4 from the overhead line L by displacing in a direction away from the fixed gripping portion 31 as indicated by the white arrow in FIG.

  In addition, the lock mechanism 6 can be locked and unlocked without the operator having to release both hands from the handle portion 10 (the handle component portions 101 and 102) of the insulating operation rod 8 with both hands. Therefore, the efficiency of indirect hot-line work can be improved.

DESCRIPTION OF SYMBOLS 1 Indirect hot wire gripping tool 2 Grip mechanism 3 Head part 31 Fixed grip part 4 Movable grip part 5 Screw rod 6 Lock mechanism 61 Locking member 8 Insulating operation rod 7 Holding member 81 Operation rod main body 82 Axis core side member 83 Insertion part 85 Meshing member 90 Output rod 10 Handle portion 11 Reinforcing ring L Overhead wire

Claims (3)

A head portion having a fixed grip portion; a movable grip portion that grips an object to be gripped by the fixed grip portion; and a penetrating through the head portion and the movable grip portion at the tip. A gripping mechanism having a screw rod attached thereto;
An insulating operation rod that provides an output for moving the screw rod in a direction toward and away from the fixed grip portion with respect to the screw rod;
A meshing member disposed on the gripping mechanism side of the insulating operation rod and having a plurality of protrusions;
In an indirect hot wire gripping tool provided with a lock mechanism that is provided on the insulating operation rod side of the head portion and can be engaged with the protrusion of the engagement member,
The insulating operating rod includes an operating rod main body and an axial core side member disposed on the axial core side of the operating rod main body, and the operating rod main body and the axial core side member include the lock mechanism. An operation mechanism for operating the locking and unlocking, and the operation bar body is slidable in a direction closer to the gripping mechanism along the axial direction of the shaft core side member,
By sliding the operating rod body toward the gripping mechanism, the protrusion of the meshing member and the lock mechanism are engaged with each other, and the displacement in the direction away from the front fixed gripping portion of the movable gripping portion is locked.
An indirect live-line gripping tool, wherein the operation member is slid in a direction away from the gripping mechanism to disengage the engagement member from the lock mechanism and unlock the displacement of the movable gripping portion. The insulating operation rod further includes a cylindrical output member into which the screw rod can be inserted, and a screwing portion is formed on the inner peripheral surface of the output member,
The engagement member is externally attached to the operation rod main body and integrated with the operation rod main body, and is attached to the shaft core side member so as to be movable along the axial direction of the shaft core side member.
The indirect hot wire gripping tool according to claim 1, wherein the output member is inserted into the shaft core side member and fixed to the shaft core side member.   In order to hold the position where the operating rod main body slides toward the gripping mechanism or the position where the operating rod main body slides away from the gripping mechanism, the operating rod main body can be connected to the shaft core side member by a holding member. The indirect hot-line gripping tool according to claim 1 or 2, characterized in that

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