JP4869113B2 - Clamp adapter - Google Patents

Description

  The present invention relates to a clamp adapter that is used by being attached to a wedge-type retention clamp during loose wire work of an overhead power transmission line.

  Conventionally, a cam-along 90 as shown in FIG. 10 is used as a jig for temporarily fastening an overhead wire while removing the overhead wire from the insulator series of the steel tower during the loose wire work in the overhead wire work. A conventional cam along 90 includes a split wedge member 92 that grips an electric wire, a split main body portion 93 into which the wedge member 92 is inserted, and an arm 91 with a hook 91 a that extends integrally from the main body portion 93. It is equipped with. Further, the outer peripheral surface of the wedge member 92 and the inner peripheral surface of the main body 93 are formed in a tapered surface shape in surface contact with each other. When the wedge member 92 holding the outer periphery of the electric wire (not shown) is inserted into the main body portion 93 and the arm 91 is pulled in the hook 91a direction, the wedge member 92 is drawn into the main body portion 93 along the tapered surface. The wire is tightened strongly.

  Since the conventional cam along 90 is entirely made of steel, there is no problem in strength. However, when the wire is deteriorated over time, the wire may be damaged by contact with the wedge member 92. In addition, since the cam along 90 itself is heavy, the burden on the operator is large. Therefore, a cam along (for example, see Patent Document 1) in which the arm is formed of an aluminum alloy and the main body is formed of a composite material in which ceramics are dispersed in the aluminum alloy, or the inner peripheral portion of the main body is made of an aluminum alloy and ceramic fibers. A cam along (for example, refer to Patent Document 2) formed of a composite material mixed with the above has been proposed.

JP-A-8-214429 JP-A-7-177626

  Since the wedge members constituting the cam along described in Patent Documents 1 and 2 are made of steel, it is impossible to avoid the occurrence of damage when used for an old electric wire as in the cam along 90 shown in FIG. Further, since there is a limit to reducing the weight of the cam along itself, it is impossible to eliminate the burden on the operator who handles the cam along.

  The problem to be solved by the present invention is to provide a clamp adapter that can perform a gentle wire operation without damaging the electric wire without using a conventional cam along, and can greatly reduce the burden on the operator. There is to do.

The clamp adapter according to the present invention includes a gripping member that is detachably attached to a main body of a wedge-type retention clamp, a locking means that prevents movement of the gripping member in at least the direction of the wedge-type retention clamp, and the gripping A tension receiving portion that receives a tensile force applied to the member, and the reaction member receiving portion that contacts the peripheral edge of the main body portion of the wedge type retention clamp is provided on the gripping member as the locking means. It is characterized by. With such a configuration, a gripping member is attached to an existing wedge-type retention clamp, and a wire or the like is locked to a tension receiving portion provided on the gripping member to pull in the direction of the wedge-type retention clamp. Therefore, it is possible to perform a loose wire work without a cam along. In addition, since it is not necessary to use a conventional cam along, the existing electric wire is not damaged and the heavy cam along is not handled at a high place, so that the burden on the operator can be greatly reduced. .

Further , as the locking means, a reaction force receiving portion that contacts the peripheral edge portion of the main body portion of the wedge type retention clamp is provided on the gripping member, so that a tensile force applied to the tension receiving portion of the gripping member is provided . Since the reaction force generated in the gripping member can be held at the peripheral edge portion of the main body portion of the wedge type retention clamp, the gripping member attached to the main body portion of the wedge type retention clamp can be securely held.

  In this case, as the locking means, it is desirable that the gripping member is provided with a concave portion that comes into contact with a connecting plate that is pivotally supported by the central support shaft of the wedge type retention clamp. With such a configuration, the reaction force generated in the gripping member due to the tensile force applied to the tension receiving portion of the gripping member can be further held by the connecting plate pivotally supported on the central support shaft of the wedge type retention clamp. The gripping member attached to the main body portion of the wedge type retention clamp can be more reliably held.

  On the other hand, it is desirable that the gripping member includes a plurality of side members disposed to face each other with the main body portion of the wedge type retention clamp interposed therebetween. With such a configuration, the gripping member is mounted in a state in which both sides of the main body portion of the wedge type retention clamp are sandwiched between the plurality of side surface members, so that a stable mounting state can be obtained.

  In this case, it is desirable to provide a connecting member that detachably connects the plurality of side members. With such a configuration, the plurality of connecting members can be separated and connected to each other, so that the gripping member can be easily attached to and detached from the main body of the wedge type retention clamp.

  According to the present invention, it is possible to provide a clamp adapter that can perform a loose wire operation without using a conventional cam along, damage the electric wire, and can greatly reduce the burden on the operator.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view showing a clamp adapter according to an embodiment of the present invention, FIG. 2 (a) is a front view of the clamp adapter shown in FIG. 1, and FIG. 1 (b) is a side view of the clamp adapter. FIG. 3C is a bottom view of the clamp adapter, and FIG. 3 is an exploded view of the clamp adapter shown in FIG.

  As shown in FIGS. 1 to 3, the clamp adapter 10 of this embodiment includes a gripping member 11 that is detachably attached to a main body 31 of a wedge-type retention clamp 30 shown in FIG. 4 described later, and a wedge-type retention clamp. Locking means (upper reaction force receiving portions 12a and 12b, lower reaction force receiving portions 13a and 13b and recess 12c) for preventing the movement of the holding member 11 in the direction P 30 of tension, and tension applied to the holding member 11 And an exposed portion 15f of a bolt 15b that functions as a tension receiving portion that receives force.

  As shown in FIG. 9, which will be described later, the gripping member 11 includes two side members 11a and 11b that are opposed to each other with the main body portion 31 of the wedge type retention clamp 30 interposed therebetween, and these side members 11a and 11b can be separated. As connecting members to be connected to each other, two bolts 15b, 16b and nuts 15n, 16n are provided. The side members 11a and 11b are plate-like bodies having both ends rounded, plate-like upper reaction force receiving portions 12a and 12b are fixed to a portion near the upper end, and a plate-like lower reaction force receiving portion 13a is attached to a portion near the lower end. , 13b are fixed. The lower reaction force receiving portions 12a and 12b are provided at lower edges thereof with a contact surface 12d inclined toward the back side of the side members 11a and 11b, and on the upper ends of the lower reaction force receiving portions 13a and 13b. , 11b is provided with a contact surface 13c having a downward slope.

  Protrusions 12e are respectively provided in the upper portions of the front surfaces of the side members 11a and 11b, and a recess 12c is provided in front of each protrusion 12e. Further, a plate-shaped fall prevention hook 14 having a locking hole 14a and a through hole 14h for locking a fall prevention rope or the like is attached to the lower ends of the side members 11a and 11b.

  Through-holes 13h, 14h communicating with the side members 11a, 11b facing each other with the fall prevention hook 14 sandwiched between the lower reaction force receiving portions 13a, 13b fixed to the lower ends of the side members 11a, 11b (see FIG. 3), the nut 16n is screwed and the clip 16p for preventing looseness is attached to the clip hole 16h at the tip of the bolt 16b, and then the upper end side of the side members 11a and 11b is penetrated. If the bolt 15b is inserted into the hole 12h (see FIG. 3), the nut 15n is screwed, and the clip 15p for preventing looseness is attached to the clip hole 15h at the tip of the bolt 15b, the clamp adapter 10 shown in FIGS. Is formed.

  Here, based on FIGS. 4-6, the wedge type | mold retention clamp 30 which mounts | wears with the clamp adapter 10 is demonstrated. 4 is a side view of the wedge type tension clamp before mounting the clamp adapter shown in FIG. 1, FIG. 5 is a view seen from the direction of arrow A in FIG. 4, and FIG. 6 is a sectional view taken along line BB in FIG. is there.

  As shown in FIGS. 4 to 6, the wedge type retention clamp 30 is connected via a connection plate 32 for connection to a support such as a steel tower (not shown) and a central support shaft 33 for holding the electric wire W. A main body 31 having a U-shaped cross section attached to the connecting plate 32, a wedge retainer 35 pivotally supported in the main body 31 via a central support shaft 33, a wedge retainer 35 and a body portion for fixing the electric wire W And a wedge member 36 disposed between the reinforcing member 34 and the reinforcing member 34 having a substantially U-shaped cross section attached to the outside of the main body 31 via a central support shaft 33. An electric wire W sandwiched between the proximal end portion of the wedge member 36 and the distal end portion of the jumper fitting 37 is fixed by a gripping fitting 38 having a U bolt 38a, and the proximal end portion of the jumper fitting 37 has a U bolt 39a. It is fixed to the electric wire W by a holding metal fitting 39.

  Next, a method for using the clamp adapter 10 will be described with reference to FIGS. 1 and 7 to 9. 7 is a diagram showing a state in which the clamp adapter shown in FIG. 1 is mounted on a wedge-type retention clamp, FIG. 8 is a diagram showing a state in which the clamp adapter in FIG. 7 is partially cut away, and FIG. 9 is a direction of arrow C in FIG. It is the figure seen from.

  As shown in FIG. 7, the existing wedge type retaining clamp 30 connects the wire R1 locked in the locking hole 32a formed in the connecting plate 32 to a support such as a steel tower (not shown). An electric wire W is stretched. The clamp adapter 10 is used by being attached to the wedge-type retention clamp 30 when performing such a loose wire operation of the electric wire W.

  When the clamp adapter 10 is attached to the wedge type retaining clamp 30, at the start of the work, a rope (not shown) or the like is locked in the locking hole 14a of the fall prevention hook 14 of the clamp adapter 10 and a steel tower (not shown). Connect to a support such as Then, after loosening the nut 15n above the clamp adapter 10 in the state shown in FIG. 1 and removing the bolt 15b from the through-hole 12h, as shown in FIG. It is attached from the front end side of the main body 31 so as to be sandwiched between the side members 11a and 11b. Next, after inserting the bolt 15b into the through-hole 11h of the side members 11a and 11b and screwing the nut 15n, the entire clamp adapter 10 is moved toward the central support shaft 33 of the wedge type tension clamp 30, and the side member The protruding portions 12 e of 11 a and 11 b are inserted into the gaps between the main body portion 31 and the reinforcing member 34, and the respective concave portions 12 c are brought into contact with the shaft support portions of the connecting plate 32. As a result, as shown in FIGS. 8 and 9, the contact surfaces 12d of the upper reaction force receiving portions 12a and 12b abut on the upper edge portion 31a of the main body 31, and the lower reaction force receiving portions 13a and 13b abut. The surface 13 c comes into contact with the lower edge portion 31 b of the main body portion 31.

  Thereafter, the wire R2 (see FIG. 8) locked to the exposed portion 15f of the bolt 15b between the upper reaction force receiving portions 12a and 12b above the side members 11a and 11b shown in FIG. ) And the like, the electric wire W is in a state of being stretched by the wire R2, the clamp adapter 10, and the wedge type retention clamp 30. At this time, the exposed portion 15f of the bolt 15b functions as a tension receiving portion. Therefore, even if the wire R1 locked to the wedge-type retention clamp 30 is loosened, the electric wire W is held in a stretched state, and thereafter, a loosening work or the like can be performed.

  In this way, the clamp adapter 10 attaches the gripping member 11 to the existing wedge-type retention clamp 30, and engages the wire R2 or the like with the tension receiving portion (exposed portion 15f of the bolt 15b) provided on the gripping member 11. If it stops, it becomes possible to pull the wedge type tension clamp 30 in the direction of tension P, so that it is possible to perform a loose wire operation without cam along. Further, since it is not necessary to use the cam along, the existing electric wire W is not damaged and the heavy cam along is not handled at a high place, so that the burden on the operator can be greatly reduced.

  Further, as means for preventing the gripping member 11 from moving in the drawing direction P, upper reaction force receiving portions 12 a and 12 b having contact surfaces 12 d that contact the upper edge portion 31 a of the main body portion 31 and the main body portion 31. Lower reaction force receiving portions 13a and 13b having contact surfaces 13c that contact the lower edge portion 31b are provided. For this reason, the reaction force generated in the gripping member 11 due to the tensile force applied to the tension receiving portion of the gripping member 11 (exposed portion 15f of the bolt 15b) causes the upper edge portion 31a and the lower edge of the main body portion 11 of the wedge type retention clamp 30 to It is hold | maintained at the edge part 31b and the holding member 11 can be hold | maintained reliably.

  Further, with the above-described configuration, even when the direction of the tensile force applied to the tension receiving portion (exposed portion 15f of the bolt 15b) of the gripping member 11 is slightly deviated from the retaining direction P, the gripping member 11 is moved. Since it can hold | maintain reliably, it can be pulled in the direction corresponding to the condition of a work site.

  Further, the side members 11a and 11b constituting the gripping member 11 are each provided with a recess 12c that abuts on the connecting plate 32 pivotally supported by the central support shaft 33 of the wedge type clamp 30. Since the reaction force generated in the gripping member 11 by the tensile force applied to the tension receiving portion (exposed portion 15f of the bolt 15b) can be held by the connecting plate 32, the gripping member 11 can be held more reliably.

  On the other hand, since the gripping member 11 is composed of two side members 11a and 11b that are disposed to face each other with the main body 31 of the wedge-type retention clamp 30 interposed therebetween, when the clamp adapter 10 is attached to the clamp 10, the main body 31 becomes the state clamped by a pair of side surface members 11a and 11b, and can acquire the very stable mounting | wearing state.

  Furthermore, since the two side members 11a and 11b are separably connected by a plurality of bolts 15b and 16b and nuts 15n and 16n, if one bolt 15b and the nut 15n are removed, the wedge-type tension clamp 30 can be removed. Can be easily attached and detached. Moreover, since it can be decomposed | disassembled in the state shown in FIG. 3 as needed, conveyance property and storage property are also favorable, and replacement | exchange of only the damaged components is easy.

  The present invention can be widely used in the slow work of existing overhead power transmission lines.

It is a perspective view which shows the clamp adapter which is embodiment of this invention. (A) is a front view of the clamp adapter shown in FIG. 1, (b) is a side view of the clamp adapter, and (c) is a bottom view of the clamp adapter. It is an exploded view of the clamp adapter shown in FIG. It is a side view of the wedge type | mold retention clamp before mounting | wearing with the clamp adapter shown in FIG. It is the figure seen from the arrow A direction in FIG. It is the BB sectional view taken on the line in FIG. It is a figure which shows the state which mounted | wore the wedge type | mold retention clamp with the clamp adapter shown in FIG. It is a figure which shows the clamp adapter in FIG. It is the figure seen from the arrow C direction in FIG. It is a side view which shows the conventional cam along.

Explanation of symbols

10 Clamp adapter 11 Holding member 11a, 11b Side member 12a, 12b Upper reaction force receiving portion
12c Concave part 12d, 13c Contact surface 12e Protruding part 12h, 13h Through hole 13a, 13b Lower reaction force receiving part 14 Fall prevention hook 14a Locking hole 14h Through hole 15b, 16b Bolt 15f Exposed part 15n, 16n Nut 15h, 16h Clip Hole 15p, 16p Clip 30 Wedge type retention clamp 31 Main body portion 31a Upper edge portion 31b Lower edge portion 32 Connecting plate 32a Locking hole 33 Center support shaft 34 Reinforcement member 35 Wedge holder 36 Wedge member 37 Jumper fitting 38, 39 Holding fitting 38a , 39a U bolt P Draining direction R1, R2 Wire W Electric wire

Claims (4)

A gripping member that is detachably attached to the main body of the wedge type tension clamp, a locking means for preventing movement of the gripping member in at least the direction of the wedge type tension clamp, and a tensile force applied to the gripping member A clamp adapter , wherein the gripping member is provided with a reaction force receiving portion that comes into contact with a peripheral edge portion of the main body portion of the wedge type retention clamp . The engagement as stop means, the gripping member, the clamp adapter according to claim 1, characterized in that a contacting recess the connecting plate which is axially supported on the central shaft of the wedge-type anchor clamps. 3. The clamp adapter according to claim 1, wherein the gripping member includes a plurality of side members disposed to face each other with the main body portion of the wedge type retention clamp interposed therebetween. The clamp adapter according to claim 3 , further comprising a connecting member that detachably connects the plurality of side members.

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