JP2014087089A - Aluminum wire anchor clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aluminum wire anchor clamp which makes possible labor saving and speeding-up of wire anchoring work on the top of an electric pole or the like by reducing the number of components required for anchoring work of a high voltage overhead wire.SOLUTION: A wire anchor clamp 10 is configured to clamp an aluminum wire W which is tensioned in the air, near a top part of an electric pole and anchoring the wire in an insulator. The wire anchor clamp 10 comprises: a main body 1; a wedge-shaped chuck body 7 formed from a lower chuck 2 and an upper chuck 3; a spring body 4 which energizes the upper chuck 3; a stopper 5 of the lower chuck 2; and a cotter 6 which engages the main body 1 to the insulator. In an end portion of the lower chuck 2 closer to the insulator, a surrounding wall 2c is formed which surrounds an end portion of the upper chuck 3 closer to the insulator and on the outer surface thereof, a blow face 2g is formed for pushing and fitting the entire chuck body 7 holding the wire W into a chuck body holding part 1a of the main body 1.

Description

  In the present invention, an aluminum electric wire for power distribution installed in the air is held by a wedge body, and a utility pole, a steel plate or a steel pipe support (hereinafter, these support posts are collectively referred to as “electric pole”). The present invention relates to an aluminum electric wire retaining clamp to be secured.

  Conventionally, various types of high-voltage (for example, 6600V) electric wires that are stretched between utility poles, for example, are distributed near the top of these utility poles, and are held on the insulator side via high-voltage insulators. Wire retention clamps are used.

  As the types of overhead electric wires, in addition to copper wires, recently called “hard aluminum wires” composed only of aluminum, and so-called “steel” surrounding the steel core wires with a plurality of aluminum twisted wires. Aluminum high-voltage electric wires (hereinafter abbreviated as “aluminum electric wires”) composed of “core aluminum stranded wires” are used.

  As an example of a conventional aluminum wire retaining clamp, there is an aluminum wire retaining clamp 50 of the type shown in FIG. 6, for example (for example, Patent Document 1).

  As shown in FIG. 6 (a), this conventional aluminum wire retaining clamp 50 is slidable in the left-right direction in the drawing along a main body 51 and a slide groove 52 provided in the main body, both of which have a wedge shape. It consists of a lower chuck 53 and an upper chuck 54, and a hexagon bolt 55, a spring washer 56 and a flat washer 57 for gripping the aluminum electric wire W (FIG. 6B) between the chucks 53, 54. The material of the component main body 51, the lower chuck 53, and the upper chuck 54 was cast iron or aluminum.

  When using the aluminum wire retaining clamp 50, as shown in FIG. 6 (b), the left end of the main body 51 is connected to an insulator (not shown), and the right end is hooked to a shimmer (known wire-drawing tool) S. Is hooked into the hook hole 59.

  The aluminum wire W is clamped between the lower chuck 53 and the upper chuck 54 and clamped to the main body 51 by the wedge effect. Before clamping, the flat washer 57 and the spring are connected between the lower chuck 53 and the upper chuck 54. The hexagon bolt 55 was firmly screwed into the lower chuck 53 through the washer 56 and fixed.

  However, the screwing operation to the lower chuck 53 with the hexagon bolt 55 has been performed over a predetermined time at a high place on the top of the utility pole (not shown), so that labor saving and speeding up of the clamping operation have been desired.

  On the other hand, as an aluminum wire retaining clamp for high-voltage transmission lines stretched between steel towers, a wedge that grips an aluminum wire by a hydraulic device such as a hydraulic cylinder and a hydraulic pump is used to force the wedge into the clamp body. There was a type of pushing into the clamp body (for example, Patent Documents 2 and 3).

  However, aluminum wire retention clamps for distribution lines intended for distribution to ordinary homes do not require hydraulic equipment that requires such a strong clamping force. Therefore, the appearance of an aluminum wire retaining clamp that can hold the aluminum wire is desired.

JP-A-7-231545 (FIG. 1, reference numeral 11) Japanese Patent Laid-Open No. 11-187551 (FIG. 5, reference numerals 20 and 21) Japanese Patent Laying-Open No. 2011-234596 (FIG. 3, reference numeral 300)

  The present invention solves the above-mentioned problems of the prior art, and by reducing the number of components of the clamp, it is possible to draw the aluminum wire at the top of the utility pole without relying on the screwing operation of the bolt or the like at a high place such as the utility pole. An object of the present invention is to provide an aluminum wire retaining clamp that enables labor saving and speeding up of the fastening work.

  In order to solve the above-mentioned problems, an aluminum electric wire retaining clamp according to the present invention clamps an aluminum electric wire stretched in the air with a predetermined tension in the vicinity of the upper part of the electric pole, and holds it on the insulator located at the upper part of the electric pole. An aluminum electric wire retaining clamp, which is a main body extending substantially in the axial direction of the aluminum electric wire, and is guided by the main body so as to freely advance and retract, and is used to hold the aluminum electric wire between a wedge-shaped lower chuck and an upper chuck. A chuck body, a spring body for constantly urging the upper chuck away from the lower chuck, a stopper for stopping excessive retreat of the lower chuck toward the lever side, and the body as the lever The main body has a mounting hole for inserting the cotter at one end and the arm at the other end. A chuck body gripping portion having a front opening into which a mini wire can be inserted and having a tapered guide groove inside, and a hook hole for temporarily stretching the aluminum wire in the air are formed, and the lower chuck and the upper The chuck is formed in a wedge shape whose upper and lower surface dimensions are gradually reduced along the main line side direction, and the wedge surface of the chuck body advances and retreats in the taper groove of the chuck body gripping portion of the main body. The aluminum wire can be gripped and the aluminum wire can be separated by the chuck and the upper chuck, and the upper chuck is provided at a position extending in a direction perpendicular to the axial direction of the main body at the lever side end of the lower chuck. An encircling wall that surrounds the insulator side end portion is formed, and an outer surface of the insulator side encircling wall of the encircling wall has an entire chuck body that grips the aluminum electric wire in the chuck body gripping portion of the main body. Wherein the striking surface for adapt crowded and is formed.

  Here, the arrangement position of the spring body is between the lower chuck and the upper chuck on the lever side, and protrusions extending in the electric wire axial direction are formed on both side surfaces of the main line side end of the upper chuck. In addition, a guide groove into which the protrusion is inserted is preferably formed in the chuck body gripping portion of the main body.

In the main body, it is preferable to form a slide groove having a concave cross section so that the lower chuck can slide along the axial direction of the aluminum electric wire.
As for the material of the chuck body of the aluminum electric wire retaining clamp of the present invention, it is preferable that the chuck body is made of an aluminum-based metal in order to familiarize the chuck body with the aluminum electric wire by the wedge action at the time of clamping and to prevent electrolytic corrosion. .

  The aluminum wire gripping surfaces of the lower chuck and the upper chuck are preferably subjected to uneven processing for improving the gripping force of the aluminum wire due to the tension of the aluminum wire. As a specific shape of the concavo-convex processing, for example, a stepped shape, a triangular pyramid or a quadrangular pyramid, or a spiral shape matching the twist angle of the aluminum wire may be used. The point is that the aluminum wire gripping surfaces of the lower chuck and the upper chuck are processed into a concavo-convex shape with the highest gripping force of the aluminum wire.

  According to the aluminum wire retaining clamp of the present invention, the following operational effects can be achieved.

  1. It is no longer necessary to use a fastener such as a hexagonal bolt used in the prior art between the lower chuck and the upper chuck, which are gripping portions of the aluminum electric wire.

Therefore, the number of parts constituting the aluminum wire retaining clamp is reduced, and the operator does not need to perform the fastening work with the hexagon bolt at the top of the utility pole.
Therefore, it is possible to save labor and speed up the aluminum wire retaining work at the top of the utility pole.

  2. In addition to the above configuration, the spring body is disposed between the lower chuck and the upper chuck on the lever side, and protrusions extending in the direction of the electric wire axis are provided on both side surfaces of the main wire side end of the upper chuck. When the guide groove into which the protrusion is inserted is formed in the chuck body gripping portion, a gap for mounting an aluminum wire is always formed between the lower chuck and the upper chuck.

  Therefore, the operator does not need to lift the upper chuck when gripping the aluminum electric wire between the lower chuck and the upper chuck.

  Therefore, the worker can save labor for clamping the aluminum electric wire at the top of the utility pole.

  3. The main body is formed with a slide groove with a concave cross section so that the lower chuck can be slid along the axial direction of the aluminum electric wire. The wedge action by the gripping part and the chuck body is effectively performed.

1 is an overall perspective view of an aluminum wire retaining clamp 10 according to an embodiment of the present invention. FIG. 2A is a front view, FIG. 2B is a plan view, and FIG. 2C is a right side view of the main body, which is a component of the aluminum wire retaining clamp 10 of FIG. . FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. 3C is a left side view of the lower chuck 2, which is a component of the aluminum wire retaining clamp 10 of FIG. 3 (d) is a right side view, and FIG. 3 (e) is an enlarged plan view of another example of the uneven portion 2k in FIG. 3 (b). 4A and 4B are four views of the upper chuck 3, which is a component of the aluminum electric wire retaining clamp 10 in FIG. 1, wherein FIG. 4A is a front view, FIG. 4B is a rear view, and FIG. FIG. 4D is a right side view. FIG. 5A is a step diagram for explaining how to use the aluminum wire retaining clamp 10 of FIG. 1, FIG. 5A is a front view showing a state in which the aluminum wire W is inserted into the aluminum wire retaining clamp 10, and FIG. FIG. 5C is a front view showing a state where the chuck body 7 is inserted into the main body 1 and the wedge surface is blended, and FIG. Is a front view showing a state in which the shimler S is removed and the tension is applied to the aluminum electric wire W. FIG. 6A is an overall view of a conventional aluminum wire retaining clamp 50, FIG. 6A is a front view thereof, and FIG. 6B is a use view of the clamp 50 of FIG. 6A.

  Hereinafter, an aluminum wire retaining clamp (hereinafter abbreviated as “wire retaining clamp”) according to an embodiment of the present invention will be described with reference to the drawings.

<Overall configuration>
FIG. 1 is an overall perspective view of an assembled state of an electric wire retaining clamp 10 according to the present invention.

  As shown in the figure, an electric wire retaining clamp 10 of the present invention includes a main body 1, a lower chuck 2, an upper chuck 3, a coil spring 4, a retaining pin 5, and a cotter 6 with a split pin. .

  Here, the lower chuck 2 and the upper chuck 3 have one wedge shape on the lower surface 2m and the upper surface 3f, and are hereinafter referred to as “chuck bodies 7”.

The assembly state of these components will be described in brief. The main body 1 is connected to a high-voltage insulator at the top of a utility pole (not shown) located in the direction of the solid line in the figure via a cotter 6 with split pins.
The imaginary aluminum wire W that is stretched is crossed at the right end of the main body 1 while being sandwiched from above and below by the lower chuck 2 and the upper chuck 3 whose outer shape is wedge-shaped. The surface is inserted into the chuck body gripping portion 1a having a substantially C shape, is strongly clamped by the wedge effect of the chuck body 7 on the chuck body gripping portion 1a, and is held in the direction of the broken arrow in the figure.

  The coil spring 4 is for urging the aluminum electric wire W so that the lower chuck 2 and the upper chuck 3 are always opened in order to save labor during assembly. The stop pin 5 is more than necessary for the lower chuck 2. It is a stopper which restrict | limits so that it may not move to the left of a figure.

  In the following description, the left side of the figure is referred to as “the insulator side” and the right side of the figure is referred to as the “main line side”.

<Each component>
Next, each component will be described in detail with reference to FIGS.

  2A and 2B are three views of the main body 1. FIG. 2A is a front view, FIG. 2B is a plan view, FIG. 2C is a right side view, and FIG. FIG.

  The main body 1 serves as a base of the electric wire retaining clamp 10 of the present invention, and includes a central arm portion 1c, a cotter portion 1d formed at the left end portion thereof, and a chuck body gripping portion 1a formed at the right end portion thereof. It is composed integrally with.

  The cotter portion 1d is a portion that is supported via a high-voltage insulator provided at the top of a utility pole (not shown), and is formed in a bifurcated yoke shape as shown in FIGS. 2 (a) and 2 (b). A through hole 1e into which the cotter 6 (FIG. 1) is inserted is provided.

  The arm portion 1c is a rod-shaped portion having a predetermined length for connecting the cotter portion 1d and the chuck body gripping portion 1a. As shown in FIG. 2D, the cross-sectional shape is a substantially “U” -shaped cross section, and a slide groove 1b is formed in the entire length. By sliding the chuck body 7 (FIG. 1) in the slide groove 1b, the entire chuck body 7 can be guided left and right. In addition, the attaching / detaching hole 5a of the retaining pin 5 described above is provided in front of the left end of the slide groove 1b.

  The chuck body gripping portion 1a is a part that clamps the lower chuck 2 and the upper chuck 3 in a state where the aluminum electric wire W is sandwiched from above and below by a wedge action, and is arranged along the electric wire axial direction so that the aluminum electric wire W can be inserted. There is a front opening 1m, and a tapered guide groove 1f is formed inside the upper and lower surface dimensions that gradually decrease as it goes to the right in the figure along the wire axis direction.

  In other words, the tapered guide groove 1f is an inclined surface that can also be called a wedge surface in terms of its function, and is distributed vertically with a wedge angle θ about the electric wire axis C.

  Further, as shown in FIG. 2C, a guide groove 1g of the upper chuck 3 described later is formed in the vicinity of the tapered guide groove 1f.

  Further, the chuck body gripping portion 1a has a predetermined length L1 in order to oppose a strong spreading force received from the chuck body 7 gripping the aluminum electric wire W, and a plurality of reinforcing surfaces are provided on the outer peripheral surface thereof. The rib 1h is formed.

  The hook hooking portion 1i is used when hooking and pulling a hook portion F of a shimmer S, which will be described later with reference to FIG.

  3 is a five-side view of the lower chuck 2, FIG. 3A is a front view thereof, FIG. 3B is a plan view, and FIG. 3C is a left side surface of the lower chuck 2 in FIG. FIG. 3 (d) is a right side view, and FIG. 3 (e) is an enlarged plan view of another example of the uneven portion 2k in FIG. 3 (b).

  As shown in FIG. 3A, the overall shape of the front surface of the lower chuck 2 is formed as a wedge-shaped inclined surface having an inclination angle 2 of the inclined surface 2m with respect to the gripping surface 2a of the aluminum electric wire W (electric wire shaft). Directional length: L2). The gripping surface 2a is an arc surface having a radius R that is slightly larger than the maximum diameter of the aluminum wire W to be clamped, and an uneven portion for preventing the aluminum wire W after clamping from slipping on the gripping surface 2a. It is formed in the electric wire axial direction.

  The shape of the concavo-convex portion includes various shapes such as a ladder-like concavo-convex portion 2k shown in FIG. 3B, a triangular pyramid concavo-convex portion 2n shown in FIG. 3E, and a quadrangular pyramid concavo-convex portion (not shown). It can be made into a shape.

  Also, on the lever side of the lower chuck 2, there are an aluminum wire support 2b protruding in a deck shape in a direction orthogonal to the electric wire axis C (FIG. 2A), and an upper chuck head surrounding wall 2c. Is formed.

  Among these, the aluminum wire support 2b is for facilitating insertion of the aluminum wire W into the gripping surface, and protrudes in the front direction of the lower chuck 2 (direction perpendicular to the paper surface).

  As shown in FIG. 1, the upper chuck head surrounding wall 2c of the lower chuck 2 positions the lever side head 3b by surrounding the lever side head 3b of the upper chuck 3 after assembly from three surfaces. For this purpose, it extends in the direction of the back surface of the lower chuck 2.

  As shown in FIG. 3B, the upper chuck head surrounding wall 2c is a substantially U-shaped wall surface in a plan view, and the side wall 2d (height H) excluding the aluminum wire gripping surface 2a side. The main wall 2e and the back wall 2f are three walls.

  A striking surface 2g projecting toward the lever side is formed on the outer surface of the insulator side wall 2d, and a rib 2h is formed on the outer surface of the main line side wall 2e so as to withstand the impact force at the time of striking.

  In addition, a coil spring mounting rod 2i having an outer diameter on which the coil spring 4 can be mounted and a length shorter than the free length of the coil spring 4 is integrally provided in the three wall surfaces.

  Further, on the back side of the lower chuck 2 and at the substantially central portion in the electric wire axial direction, the lower chuck 2 is engaged with the engaging groove 1p (FIG. 2A) of the main body 1 when the lower chuck 2 is assembled into the main body 1. A protrusion 2j is formed.

  4 is a four-side view of the upper chuck 3. FIG. 4 (a) is a front view, FIG. 4 (b) is a rear view thereof, FIG. 4 (c) is a left side view, and FIG. 4 (d) is a right side view. FIG.

  As shown in FIG. 4A, the front shape of the upper chuck 3 is formed in a wedge shape with the inclination angle of the inclined surface 3f with respect to the direction of the electric wire axis C being the same as that of the lower chuck 2 described above.

  Further, as shown in FIG. 4B, an uneven portion 3c having the same shape as that of the lower chuck 2 described above is formed on the back surface of the aluminum electric wire gripping surface 3a in the direction of the electric wire axis C (FIG. 2A). Has been.

  Further, on the front side and the back side of the upper chuck 3 on the main line side, a protrusion 3d that is locked in the guide groove 1g of the chuck body gripping portion 1a of the main body 1 described above has a wedge angle θ and a predetermined length in the direction of the wire axis C. Is formed.

  On the other hand, as shown in FIG. 4B, an insulator side head 3b is formed on the back surface of the upper chuck 3 on the insulator side in a direction perpendicular to the electric wire axis C, and the compression described above is formed on the back surface thereof. A coil spring receiver 3e is formed as a circular recess.

  The planar shape of the insulator side head portion 3b is formed in the above-described upper chuck head surrounding wall 2c of the lower chuck 2 so that it can be easily retracted during use.

Of the components of the present invention described above, the main body 1 is made of cast iron, and the material of the lower chuck 2 and the upper chuck 3 is made of an aluminum-based metal such as aluminum or an aluminum alloy.
As the manufacturing method of the upper and lower chucks, there are a vacuum die casting method, a non-porous die casting method, and the like capable of mass production and high quality, in addition to a method of cutting from an aluminum base metal and a manufacturing method by a general casting method.

<Assembly of each component>
In order to assemble the above-described components into the wire retaining clamp 10 shown in FIG. 1, first, the locking pin 5 is removed from the main body 1, and the protrusion 2 j of the lower chuck 2 is engaged with the engaging groove 1 p of the main body 1. After that, the inclined surface 2m (wedge surface) of the lower chuck 2 is inserted into the slide groove 1b of the main body 1, the entire lower chuck 2 is pulled down to the lever side, and the coil spring 4 is attached to the coil spring mounting rod 2i of the lower chuck 2. Insert inside.

  Next, while inserting the protrusion 3d of the upper chuck 3 into the guide groove 1g of the main body 1, the opposite side lever side head 3b is fitted from above into the upper chuck head surrounding wall 2c of the lower chuck 2, and at the same time the coil The head of the spring 4 is stored in the spring receiver 3e.

Thus, the assembly of the upper chuck 3 and the lower chuck 2 with respect to the main body 1 is completed, and the gap G for inserting the aluminum wire is always between the upper chuck 3 and the lower chuck 2 due to the repulsive action of the coil spring 4. (FIG. 1) is formed.
<How to use>
Next, based on FIG. 5, the usage method of the aluminum electric wire retention clamp 10 of this invention is demonstrated.

  First, as shown in FIG. 5A, the cotter portion 1d of the main body 1 is hooked on a hook of a high-pressure insulator (not shown).

  Next, after hooking the hook F of the shimler S, which is a tensioner of the aluminum electric wire W, to the hook hooking portion 1i of the main body 1 to draw the aluminum electric wire W, the entire wire holding clamp 10 is made an insulator of the lower chuck 2 Pull down to the insulator side until the side end abuts against the set pin 5. FIG. 5A shows this state.

  At this time, on the main line side of the upper chuck 3, the protrusion 3 d of the upper chuck 3 is supported by the guide groove 1 b of the chuck body gripping portion 1 a of the main body 1, while the lever side is moved away from the lower chuck 2 by the coil spring 4. Since the bias is always applied, an insertion gap G for the aluminum wire W is always secured between the lower chuck 2 and the upper chuck 3. Therefore, when the operator inserts the aluminum electric wire W between the lower chuck 2 and the upper chuck 3, it is not necessary to lift the upper chuck 3 upward with his / her hand, and the work of attaching the aluminum electric wire W to the chuck body 7 is not necessary. Labor saving is achieved.

  Next, as shown in FIG. 5 (b), the operator places the entire chuck body 7 into the tapered guide groove 1 f of the chuck body gripping portion 1 a of the main body 1 with the inclined surfaces 2 m and 3 f (wedge surface). Push until it touches.

  Next, although this work is important in the present invention, as shown in FIG. 5 (c), by strongly pushing the striking surface 2g of the lower chuck 2 toward the main line in the direction of the arrow, The entire chuck body 7 is pushed into the tapered guide groove 1f (wedge surface) of the chuck body gripping portion 1a until it fits well.

  In this case, since the lever side head 3b of the upper chuck 3 is in contact with the back side of the striking surface 2g as shown in the figure, the chuck body (wedge body) 7 composed of the lower chuck 2 and the upper chuck 3 is Together, it is pushed into the tapered guide groove 1f of the chuck body gripping portion 1a. That is, this process corresponds to a wedge body pushing operation using a conventional hydraulic device such as a hydraulic cylinder.

  Finally, as shown in FIG. 5 (d), the hook F of the shimmer S is removed from the hook hooking portion 1 i of the main body 1, and the tension is applied to the aluminum electric wire W. The aluminum electric wire W tries to pull the chuck body 7 to the main line side by its own tension, but the lower chuck 2 and the upper chuck are applied as the tension of the aluminum electric wire W is applied to the chuck body 7 due to the wedge effect of the chuck body 7. 3 is firmly clamped.

<Operational effects of the invention>
The aluminum wire retaining clamp 10 of the present invention thus obtained can exhibit the following operational effects.

  1. The electric wire retaining clamp 10 of the present invention is configured such that when the chuck body 7 composed of the lower chuck 2 and the upper chuck 3 is pushed into the wedge surface 1f in the tapered guide groove 1f of the chuck body gripping portion 1a of the main body 1, the lower chuck 2 It is only necessary to push the upper chuck head surrounding wall 2c in the direction of the chuck body gripping portion 1a of the main body 1 so that the upper chuck head surrounding wall 2c is compliant, and as described above with reference to FIG. Is no longer necessary.

  Therefore, the worker can achieve labor saving and speed-up of the aluminum wire retaining work.

  2. As described above, on the main line side of the upper chuck 3, the protrusion 3 d of the upper chuck 3 is supported by the guide groove 1 g of the chuck body gripping portion 1 a of the main body 1, while the lever side is supported by the coil spring 4 by the lower chuck 2. Therefore, an insertion gap G for the aluminum electric wire W is always secured between the lower chuck 2 and the upper chuck 3.

  Therefore, when the operator inserts the aluminum wire W between the lower chuck 2 and the upper chuck 3, the operator does not have to secure the gap for inserting the aluminum wire by lifting up the upper chuck 3 with his / her hand. The work of attaching W to the chuck body 7 can be further saved.

  3. Since the main body 1 is formed with a slide groove 1b having a concave cross section so that the lower chuck 2 can slide along the axial direction of the aluminum electric wire, the relative movement of the entire chuck body 7 with respect to the main body 1 is smooth. become.

  Therefore, the wedge action by the chuck body gripping portion 1a and the chuck body 7 is effectively performed.

1 Body 1a Chuck body gripping part 1b Slide groove 1e Mounting hole 1f Tapered guide groove (wedge surface)
1g Guide groove 2 Lower chuck 2a Aluminum wire gripping surface 2c Upper chuck head surrounding wall (enclosure wall)
2g Striking surface 2m Inclined surface of lower surface (wedge surface)
3 Upper chuck 3b Insulator side head 3d Projection 3f Inclined surface of upper surface (wedge surface)
4 Coil spring (spring body)
5 Stopping pin (stopper)
6 Cotter with split pin 7 Chuck body 10 Aluminum wire retention clamp (product of the present invention)
50 Aluminum wire retention clamp (conventional product)
C Wire shaft G of overhead high-voltage aluminum wire G Clearance for inserting aluminum wire L Length of chuck body gripping part of main body S Wire tension wire W Aerial high-pressure aluminum wire θ Wedge angle

In order to solve the above-mentioned problems, an aluminum electric wire retaining clamp according to the present invention clamps an aluminum electric wire stretched in the air with a predetermined tension in the vicinity of the upper part of the electric pole, and holds it on the insulator located at the upper part of the electric pole. An aluminum wire retaining clamp, which is a main body extending substantially in the axial direction of the electric wire, and can be moved forward and backward with respect to the main body and the electric wire without being fixed to the electric wire by a fastening metal fitting when attached to the main body. A chuck body for guiding the electric wire between the lower chuck and the upper chuck, both of which are wedge-shaped, a spring body for constantly urging the upper chuck away from the lower chuck, and the lower body The book comprises: a stopper for stopping excessive retreat of the chuck toward the lever side; and a cotter for locking the main body to the lever. Is formed with a mounting hole for inserting the cotter at one end, a front opening into which the electric wire can be inserted at the other end, and a chuck body gripping portion having a tapered guide groove inside, A hook hole for temporarily stretching the electric wire in the air is formed, and the lower chuck and the upper chuck are formed in a wedge shape whose upper and lower surface dimensions are temporarily reduced along the main line side direction. The wedge surface moves forward and backward in the tapered guide groove of the chuck body gripping portion of the main body, so that the lower chuck and the upper chuck can grip the wire and separate the wire, and the lever side end of the lower chuck In the part, an enclosing wall for standingly and removably enclosing and locking the insulator side end of the upper chuck is erected integrally with the lower chuck at a position extending in a direction perpendicular to the axial direction of the main body. It is further among the surrounding wall The outer surface of the slave surrounding wall, characterized in that the striking surface for adapt push together the entire chuck body holding the electric wire to the chuck body grip portion of the body is formed.

As shown in FIG. 3B, the upper chuck head surrounding wall 2 c is a wall surface that extends in a direction orthogonal to the axial direction of the main body 1 and has a substantially “U” shape in plan view. There are three walls including a side wall 2d (height H) excluding the aluminum electric wire gripping surface 2a side, a main side wall 2e, and a rear side wall 2f.

Claims (3)

An aluminum electric wire tension clamp for clamping an aluminum electric wire stretched with a predetermined tension in the air in the vicinity of the upper portion of the electric pole, and holding it to an insulator located at the upper portion of the electric pole,
A main body extending substantially in the axial direction of the electric wire;
A chuck body that is guided by the main body so as to be freely advanced and retracted, and for holding the electric wire between a lower chuck and an upper chuck each having a wedge shape;
A spring body for constantly urging the upper chuck in a direction away from the lower chuck;
A stopper for stopping excessive retreat of the lower chuck toward the lever side;
A cotter for locking the main body to the insulator,
The main body has an attachment hole for inserting the cotter at one end, a front opening into which the electric wire can be inserted at the other end, and a chuck body gripping portion having a tapered guide groove inside. A hook hole for temporarily stretching the electric wire in the air is formed,
The lower chuck and the upper chuck are formed in a wedge shape in which the upper and lower surface dimensions are gradually reduced along the main line side direction, and the wedge surface of the chuck body advances and retreats in the tapered groove of the chuck body gripping portion of the main body. Thus, it is possible to hold the electric wire and separate the electric wire with the lower chuck and the upper chuck,
An enclosure wall that surrounds the insulator side end of the upper chuck is formed at a position extending in a direction orthogonal to the axial direction of the main body at the insulator side end of the lower chuck, An aluminum electric wire retaining clamp, characterized in that a striking surface is formed on the outer surface of the insulator-side surrounding wall to push and fit the entire chuck body holding the electric wire into the chuck body holding portion of the main body. In the aluminum electric wire retaining clamp according to claim 1,
The arrangement position of the spring body is between the lower chuck and the upper chuck on the lever side,
Protrusions extending in the wire axis direction are formed on both side surfaces of the main chuck side end of the upper chuck, and guide grooves into which the protrusions are inserted are formed in the chuck body gripping portion of the main body. Features aluminum wire retention clamp. In the aluminum electric wire retaining clamp according to claim 1 or 2,
An aluminum electric wire retaining clamp, wherein the main body is formed with a slide groove having a concave cross section so that the lower chuck can slide along the axial direction of the electric wire.

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