JP4937151B2 - Wire connection clamp device - Google Patents

Description

  The present invention relates to an electric wire connection clamp device used when a bypass wire, a ground wire, and the like are drawn out from a covered electric wire wired in the air.

  In the overhead wire construction, when electrically connecting the bypass wire, ground wire, etc. to the covered wire in the air by remote control from the ground or on the work vehicle, (1) strip the insulation coating of the covered wire for a predetermined length, A method in which the exposed core wire is clamped with a connection clamp to which a bypass wire or the like is connected, or (2) a contact blade that is provided with a contact blade and to which the bypass wire or the like is connected is passed through the insulation coating. The method of connecting to the core wire is adopted. For example, in the latter method (2), a connection clamp device 60 disclosed in Patent Document 1 as shown in FIG. 6 is used.

  In this connection clamp device 60, a movable contact base 63 equipped with a contact blade 62 is disposed below the clamp body 61, and an electric wire holding portion 64 is disposed above the clamp body 61 so as to face the contact blade 62. Has been. Then, by operating the knob 69 to rotate the screw shaft 68, the movable contact base 63 (contact blade 62) is advanced (straightly moved) toward the covered electric wire A held by the electric wire holding portion 64, and the contact blade 62 is penetrated through the insulation coating B of the covered electric wire A, and the top portion 62a of the contact blade 62 is brought into contact with the core wire C, so that the electrical connection between the contact blade 62 and the core wire C is obtained.

The electric wire holding portion 64 includes an electric wire holding main body 64a that is integral with the clamp main body 61, and an electric wire holding plate 67 that is rotatably attached to the upper portion of the clamp main body 61 via a pin 66. The electric wire holding body 64a is provided with a substantially inverted U-shaped groove 65a having a semicircular portion having a diameter substantially equal to the diameter of the large-diameter covered electric wire A. A substantially inverted U-shaped groove 65b having a semicircular portion having a diameter substantially equal to the diameter is provided. These concave grooves 65a and 65b are configured so that the inner peripheral surfaces thereof are in surface contact with the outer peripheral surfaces of the large-diameter coated electric wire A and the small-diameter coated electric wire A in close contact with each other to hold the coated electric wire A firmly. .
JP-A-9-330749

  However, in the connection clamp device 60 described above, the contact blade 62 only moves straight toward the covered electric wire A held by the electric wire holding portion 64, and the contact blade 62 receives a large resistance in the insulation coating B. A large force was required to reach the core C, and there was a problem in workability. When the covered electric wire A having an intermediate diameter between the diameter of the semicircular portion of the concave groove 65a and the diameter of the semicircular portion of the concave groove 65b is to be held in the electric wire holding portion 64, The central axis may be held eccentrically by the electric wire holding part 64. In such a case, the contact blade 62 may come out of contact with the central axis of the core C and the electrical continuity may become unstable. there were.

  The present invention has been made in view of the above-described problems. The contact blade provided in the wire connection clamp device is connected to a remote control rod and remotely operated from the ground or the like, so that the workability is relatively low. An object of the present invention is to provide an electric wire connection clamping device that can be well cut into an insulation coating of a covered electric wire and reliably contact a core wire to ensure stable electrical conduction.

  The wire connection clamp device according to claim 1 advances toward a clamp main body having an electric wire holding portion for holding a covered electric wire and a covered electric wire held by the electric wire holding portion, and cuts into the insulating coating to contact the core wire. It comprises a contact blade, and further comprises an elevating and reciprocating mechanism that reciprocates along the central axis direction of the covered electric wire while moving the contact blade forward toward the covered electric wire held by the electric wire holding portion. Is.

  According to the wire connection clamping device of the first aspect of the present invention, the contact blade can be advanced toward the core wire while reciprocating, so that the resistance received in the insulation coating can be reduced and is relatively light. The core wire can be reached with force, and workability can be improved. Moreover, since it can be made to contact a core wire reliably, the electrical continuity with a contact blade and a core wire can be ensured stably.

  The electric wire connection clamping device according to a second aspect of the present invention is the electric wire connection clamping device according to the first aspect, wherein the contact blade includes a main blade portion having a ridge line parallel to the central axis direction of the covered electric wire, and the main blade. And an inclined blade portion having a ridge line that is widened and inclined from both ends of the portion toward the proximal end side of the contact blade.

  According to the wire connection clamping device of the second aspect, since the insulating coating can be further torn in the central axis direction of the covered electric wire by the inclined blade portion, the resistance received in the insulating coating can be further reduced and lighter. The contact blade can reach the core wire with force, and the workability can be further improved.

  Moreover, the electric wire connection clamp apparatus which concerns on Claim 3 of this invention is an electric wire connection clamp apparatus of Claim 1 or Claim 2, In order to hold | maintain a covered electric wire in the surface facing the contact blade of a clamp main body. An electric wire holding recess having a curvature that changes in accordance with the diameter of the small-diameter covered electric wire from the diameter of the small-diameter covered electric wire is provided. An electric wire holding groove for holding the electric wire is provided.

  According to the electric wire connection clamping device according to claim 3, the covered electric wire having a diameter corresponding to the small diameter to the large diameter is held by the electric wire holding concave portion above, and the covered electric wire having a diameter corresponding to the small diameter is The upper part is held in a state of being fitted into the electric wire holding groove. Therefore, the central axis of the covered electric wire is not held eccentrically in the electric wire housing part, and the contact blade comes into contact with the central axis of the core wire from directly below, so that more stable electrical conduction can be obtained.

  According to the wire connection clamp device of the present invention, the contact blade provided in the wire connection clamp device is connected to the remote control rod and remotely operated from the ground or the like, so that the insulation coating of the covered wire is performed with relatively light force and good workability. It is possible to make sure that electrical continuity is stably ensured by making the wire cut into contact with the core wire.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the electric wire connection clamping device of the present invention will be described in detail with reference to FIGS. FIG. 1 is a perspective view (from the front diagonal) for explaining the outline of the wire connection clamping device according to the present invention, and FIG. 2 is also a perspective view (from the rear diagonal). Moreover, FIG. 3 is a front view for demonstrating the structure of the electric wire connection clamp apparatus based on this invention, and FIG. 4 is a side view (a part includes X-X 'sectional drawing) similarly. Furthermore, FIG. 5 is explanatory drawing for demonstrating the reciprocation mechanism of the wire connection clamp apparatus which concerns on this invention. It should be understood that the embodiments disclosed below are illustrative in all respects and are not restrictive. The technical scope of the present invention is shown not by the content disclosed in the embodiment but by the description of the scope of claims, and further includes all modifications within the meaning and scope equivalent to the scope of claims. Should be understood.

  The wire connection clamp device 1 according to the present invention advances toward the clamp body 10 having the wire holding portion 13 for holding the covered wire A and the covered wire A held by the wire holding portion 13, and the insulation coating B A contact blade 20 that cuts into contact with the core wire C, a contact blade support 20 that is attached to the contact blade 20 and that moves up and down and reciprocates together with the contact blade 20 by an up-and-down reciprocating mechanism 40 described later, and a remote control rod 2 It is configured to include an elevating / reciprocating mechanism 40 that elevates and reciprocates the contact blade support 30 by operation.

  The up-and-down reciprocating mechanism 40 will be described in detail later, but by rotating the rotating shaft of the remote control rod 2 in the forward direction, the contact blade 20 attached to the contact blade support 30 is moved to the electric wire holding portion. Insulating coating B of coated electric wire A with relatively light force and good workability by reciprocating along the central axis direction of coated electric wire A while moving forward toward coated electric wire A held by 13. In order to ensure electrical continuity between the contact blade 20 and the core wire C, the core wire C is reliably brought into contact with the core wire C. Further, when releasing the electrical continuity, the contact blade 20 attached to the contact blade support base 30 was held by the electric wire holding portion 13 by rotating the rotating shaft of the remote control rod 2 in the reverse direction. The contact blade 20 that has been cut into the insulating coating B of the covered electric wire A can be easily detached from the core wire C by reciprocating along the central axis direction of the covered electric wire A while retracting from the covered electric wire A.

  The clamp body 10 includes a cylindrical base portion 11 having upper and lower ends opened, a guide portion 12 extending upward from one side portion (right side portion in FIG. 4), and an upper end of the guide portion 12. It is comprised from the electric wire holding part 13 fixed to the part so that the upper part of the base | substrate part 11 might be covered.

  The electric wire holding part 13 is comprised using a pair of side wall board 14 distribute | arranged perpendicularly to the central-axis direction of the covered electric wire hold | maintained, and the surface facing each contact blade 20 of each side wall board 14 is small diameter to large diameter. The wire holding recess 15 for holding the covered wire A is provided, and the wire holding for holding the covered wire A having a smaller diameter than the small diameter covered wire A is provided at the center of the wire holding recess 15 portion. A concave groove 16 is provided.

  The electric wire holding recess 15 is composed of a surface having a curvature that changes in accordance with the diameter of the small-diameter covered electric wire A (for example, a diameter of 5 mm or more) to the diameter of the large-diameter covered electric wire A (for example, a diameter of 30 mm or less). Moreover, the electric wire holding concave groove 16 is formed of a semicircular surface having a curvature corresponding to the diameter (for example, less than 5 mm in diameter) of the covered electric wire A having a smaller diameter than the covered electric wire A having a small diameter.

  Thereby, the covered electric wire A having a diameter corresponding to the small diameter to the large diameter is held above the electric wire holding recess 15, and the covered electric wire A having a diameter corresponding to the small diameter is arranged above the electric wire holding groove 16. It is held in a state of being fitted in. Therefore, the central axis of the covered electric wire A is not eccentrically held by the electric wire holding part 13, and the contact blade 20 comes into contact with the central axis of the core wire C from directly below, so that stable electrical conduction can be obtained. .

  The contact blade 20 includes a contact blade base portion 21 and a blade edge 22 provided to protrude upward from the upper end surface of the contact blade base portion 21. The blade edge 22 has a main blade portion 22a having a ridge line parallel to the central axis direction of the covered electric wire A, and a ridge line which is widened and inclined from both ends of the main blade portion 22a to the base end side (the upper surface of the contact blade base portion 21). The inclined blade portion 22b is integrally provided. The contact blade 20 is fixed to the contact blade mounting member 31 with screws in a state where the contact blade base portion 21 is fitted in a recess 31a of a contact blade mounting member 31 described later.

  The contact blade 20 is made of a copper alloy (for example, beryllium copper) that has excellent electrical conductivity and thermal conductivity and has a high hardness after age hardening, and the contact blade 20 (the blade edge 22 and the contact blade base portion 21) The width and thickness are set as a shape having a reasonably large cross-sectional area so that it will not be heated excessively by Joule heat even if a large current flows through it, and so as to withstand the force when cutting the insulation coating B. ing.

  When the contact blade 20 advances toward the covered electric wire A, the main blade portion 22a cuts perpendicularly to the insulation coating B, and the inclined blade portion 23 has the contact blade 20 that is the central axis of the covered electric wire A. When the reciprocating motion is performed, the insulating coating B is cut from an oblique direction. The angle (inclination angle) formed by the ridge line of the inclined blade portion 23 with respect to the upper surface of the contact blade base portion 21 is preferably in the range of 30 ° to 90 °, and the optimum angle corresponding to the material of the insulating coating B and the like. Is set to

  The contact blade support 30 includes a contact blade mounting member 31 in which a concave portion 31a to which the contact blade 20 is attached is formed at the upper center, and a pair of left and right legs 31c extending downward in the lower portion, and a guide portion of the clamp body 10 12 and a pair of support members (upper support member 32 and lower support member 33) that are vertically supported and supported to move up and down as the lifting shaft 42 moves up and down. Yes.

  The contact blade mounting member 31 has the contact blade 20 attached to the concave portion 31a at the upper center, and a terminal connecting portion to which a bypass wire, a ground wire, and the like are terminal-connected to one side end thereof. Further, the contact blade mounting member 31 is formed with a stepped portion 31b having a lower width and thickness set at a substantially central portion in the vertical direction, and a pair of left and right portions below the stepped portion 31b. The leg part 31c is extended.

  The upper support member 32 is formed with a lifting guide hole 32a at the rear center thereof, and a reciprocating guide hole 32b is formed at the front center thereof, and the lower support member 33 is provided with a lifting guide hole 33a at the rear center thereof. A reciprocating guide groove 33b is formed in each. Further, the pair of upper and lower support members 32 and 33 are fixedly connected to each other with a fixing plate 34 on the rear side and a fixing screw on the front side so as to be horizontally arranged at a predetermined interval. And the guide part 12 of the clamp main body 10 has penetrated the raising / lowering guide holes 32a and 33a of a pair of upper and lower support members 32 and 33, The contact blade support stand 30 can be moved up and down by this guide part 12. Guidance is supported.

  The contact blade mounting member 31 is inserted through the reciprocating guide hole 32b provided at the front center of the upper support member 32 directly below the stepped portion 31b, and the lower surface flange portion of the stepped portion 31b is engaged with the upper surface edge of the reciprocating guide hole 32b. Match. A pair of left and right leg portions 31 c formed below the stepped portion 31 b of the contact blade mounting member 31 straddles an eccentric cam 41 described later, and the bottom surfaces of both leg portions 31 c are provided in the front center of the lower support member 33. While engaging with the guide groove 33 b, the inner side surfaces of both leg portions 31 c are in contact with the peripheral surface of the eccentric cam 41.

  That is, the eccentric cam 41 is fitted between the lower leg portions 31c of the contact blade mounting member 31, and the circumferential surface of the eccentric cam 41 is configured to abut against the inner side surfaces of the both leg portions 31c. When the cam 41 rotates, the stepped portion 31 b of the contact blade mounting member 31 is guided to the reciprocating guide hole 32 b of the upper support member 32, and both leg portions 31 c of the contact blade mounting member 31 are formed in the reciprocating guide groove 33 b of the lower support member 33. The contact blade 20 that is guided and attached to the recess 31a of the contact blade attachment member 31 can reciprocate in the central axis direction of the covered electric wire A (the left-right direction in FIG. 5).

  The up-and-down reciprocating mechanism 40 has an eccentric cam 41 and a male screw portion 42a that engages with a female screw portion 11a formed so as to penetrate vertically along the axis of the base body portion 11 of the clamp body 10 on the outer peripheral surface. A lift shaft 42 having a cross-sectional square hole 42b along the axial direction inside the shaft center and provided with an eccentric cam 41 projecting upward at the top, and a cross-sectional square hole of the lift shaft 42 And an input shaft 43 that is inserted into 42b and is coupled to the elevating shaft 42 so as not to be rotatable relative to the elevating shaft 42 and to be relatively movable in the axial direction. As shown in FIG. 5, the eccentric cam 41 is formed of a disk having a center Q at a position displaced from the center P of the lifting shaft 42.

  The input shaft 43 has a bolt head-shaped input end portion 43a at the lower end thereof, a square shaft portion 43b that is inserted into the square hole 42b in a relatively non-rotatable manner, and the input end portion 43a and the square shaft portion 43b. Is supported by the base body 11 via a bearing 44 so as to be rotatable and not movable up and down. The input end portion 43 a is disposed at the inner lower end portion of the base body portion 11. When the input end portion 43a is rotated in the forward direction using a remote control rod wrench or the like, the lift shaft 42 is also rotated along with the rotation of the input shaft 43, and is guided to the female screw portion 11a and rises. The eccentric cam 41 provided at the top of the elevating shaft 42 also rises while rotating about its central axis integrally with the elevating shaft 42, and accordingly, the upper surface of the eccentric cam 41 becomes the lower surface of the upper support member 32. Abutting and pushing it up, the contact blade support 30 is also raised as shown by a two-dot chain line in FIG. Further, when the input end 43a is rotated in the reverse direction, the lifting shaft 42, and hence the eccentric cam 41, is lowered while rotating, and accordingly, the lower surface of the eccentric cam 41 is placed on the upper surface of the reciprocating guide groove 33b of the lower support member 33. The contact blade support 30 is returned to the initial position indicated by the solid line in FIG.

  According to the wire connection clamping device 1 of the present embodiment, the contact blade 20 is provided by including the contact blade support base 30 that is engaged and supported so as to be able to move up and down and reciprocate. Since it can be moved forward toward the core wire C while being reciprocated, the resistance received in the insulation coating B can be reduced, and the core wire C can be reached with a relatively light force, thereby improving workability. Can be made. Moreover, since it can be made to contact with the core wire C reliably, the electrical continuity with the contact blade 20 and the core wire C can be ensured stably.

  Furthermore, since the contact blade 20 includes a main blade portion 22a and an inclined blade portion 22b, and the insulating coating B can be cut in the central axis direction of the covered electric wire A by the inclined blade portion 22b, the resistance received in the insulating coating B Since the contact blade 20 can reach the core wire C with a lighter force, the workability can be further improved.

  Further, by providing a wire holding concave portion 15 for holding the covered electric wire A having a small diameter to a large diameter from above, and a wire holding concave groove 16 for holding the covered electric wire A having a smaller diameter than the small diameter from the upper side, Even if it is the covered electric wire A, the center axis | shaft is not eccentrically held by the electric wire holding part 13, and the contact blade 20 contacts with respect to the central axis of the core wire C from right under, and obtains more stable electrical conduction. be able to.

  The wire connection clamp device 1 of the present invention is not limited to the aspect shown in the above embodiment, and the structure of the contact blade support base 30 and the up-and-down reciprocating mechanism 40 can be changed as appropriate. In the above embodiment, the eccentric cam 41 is disposed between the pair of support members 32 and 33, and the eccentric cam 41 is inserted between the both leg portions 31c of the contact blade mounting member 31, An integrated support member and a contact blade mounting member that engage with the eccentric cam 41 may be used, or a contact blade support base of another aspect may be used.

  Moreover, the contact blade 20 does not necessarily need to include the inclined blade portion 22b, and the electric wire holding portion does not necessarily include the electric wire holding groove. If the wire connection clamp device 1 of the present invention includes the up-and-down reciprocating mechanism 40 exemplified in the above embodiment, the resistance that the contact blade 20 receives in the insulating coating B can be reduced. The contact blade 20 can reach the core wire C with a moderate light force, and workability can be improved. Moreover, since it can be made to contact with the core wire C reliably, the electrical continuity with the contact blade 20 and the core wire C can be ensured stably.

It is a perspective view (from front diagonal) for demonstrating the outline | summary of the electric wire connection clamp apparatus which concerns on this invention. It is a perspective view (from back diagonally) for demonstrating the outline | summary of the electric wire connection clamp apparatus which concerns on this invention. It is a front view for demonstrating the structure of the electric wire connection clamp apparatus which concerns on this invention. It is a side view for explaining the structure of the electric wire connection clamp device concerning the present invention (a part is included X-X 'sectional view). It is explanatory drawing for demonstrating the reciprocation mechanism of the electric wire connection clamp apparatus which concerns on this invention. It is a side view for demonstrating the structure of the conventional electric wire connection clamp apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire connection clamp apparatus 10 Clamp main body 13 Electric wire holding part 15 Electric wire holding recessed part 16 Electric wire holding recessed groove 20 Contact blade 22 Cutting edge 22a Main blade part 22b Inclined blade part 30 Contact blade support stand 31 Contact blade attachment member 32 Upper support member 33 Lower part Support member 40 Elevating / reciprocating mechanism 41 Eccentric cam 42 Elevating shaft

Claims (3)

Clamp body having an electric wire holding part for holding a covered electric wire, and an electric wire connection clamping device provided with a contact blade that advances toward the covered electric wire held by the electric wire holding part, cuts into the insulating coating, and contacts the core wire In
An electric wire connection clamp comprising an elevating and reciprocating mechanism that reciprocates along the central axis direction of the covered electric wire while moving the contact blade forward toward the covered electric wire held by the electric wire holding portion. apparatus.   The contact blade includes a main blade portion having a ridge line parallel to the central axis direction of the covered electric wire, and an inclined blade portion having a ridge line that is widened and inclined from both ends of the main blade portion toward the proximal end side of the contact blade; The electric wire connection clamp apparatus of Claim 1 provided with.   An electric wire holding recess having a curvature that changes from the diameter of the small-diameter covered electric wire to the diameter of the large-diameter covered electric wire for holding the covered electric wire is provided on the surface of the clamp body that faces the contact blade. The electric wire connection clamping device according to claim 1, wherein an electric wire holding concave groove for holding an even smaller diameter covered electric wire than a small diameter covered electric wire is provided at the center of the electric wire holding concave portion.

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