JP2006006018A - Rotating tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating tool which can facilitate the work of a high voltage device by realizing clamping/releasing work for rotating while assuring insulation property without damaging a rotary fastener at a remote position. <P>SOLUTION: The rotary tool rotates a bushing so as to thrust the bushing into the male screw of a transformer installed at a pole. The rotary tool includes a cup 10 having the pressure welding cup 11 of a rubber material which is pressure welded by inserting the outer peripheral surface of the bushing to be surrounded, a sheathing cup 12 for mounting the pressure welding cup 11, and a joint 13 to which the end of an insulating rod is attached. The pressure welding part is mounted at the tip of the insulating rod so that the rotary axis of the bushing inside this cup 10 coincides with the extending direction of the insulating rod. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotating tool, and more particularly, to a rotating tool that can be easily damaged can be rotated from a remote position.

Conventionally, for example, as shown in FIG. 6, when the electric wire D is connected to a transformer 112 installed on the upper part of the utility pole 111, a so-called bushing (terminal part) is connected to a male screw part (terminal part) on the transformer 112 side. It is often used to screw the female thread portion of the rotary fastener 100A. Since the high voltage current flows through the transformer 112, the bushing 100A is generally manufactured so as to be covered with an insulating material so that the conductive material is not exposed. For example, the bushing used for a high voltage location is in a state of being covered with ceramics (see, for example, Patent Documents 1 and 2).
JP 2003-309924 A JP 2004-40849 A

  However, since the ceramic on the exterior surface of the bushing 100A is a very brittle material, conventionally, the work of tightening / releasing using rubber gloves or the like has been performed. It is necessary to adopt an indirect hot-wire method that works from a remote location from the viewpoint of ensuring safety. Therefore, for example, when a tool made of a metal material such as a so-called pipe wrench or a monkey spanner is attached to an insulating rod and rotated from a remote position to be tightened and released, there is a possibility that the tool is missing.

  In addition, when using a pipe wrench or the like, such a bushing 100A needs to be rotated in a state of being directly meshed with a hand. In the transformer 112 installed on the upper side of the utility pole 111, a high place such as a bucket is required. Large work equipment is required. However, it is difficult to use a device for working at a high place, and it may not be used in a narrow work space.

  Further, since a high voltage current flows through the transformer 112, it is necessary to stop supplying power or wear an insulating protective device in order to rotate the bushing 100A. However, it is desirable to be able to work safely from a remote location without having to wear the protective equipment for insulation.

  Therefore, the present invention facilitates work on high-voltage equipment by realizing a tightening / releasing operation that rotates a rotary fastener at a remote position while ensuring insulation without damaging it. The purpose is to provide a rotating tool.

  A first invention of a rotating tool that solves the above problem is a rotating tool that rotates a rotating fastener so as to be screwed into a terminal portion of a device that is installed at a remote position. The inner peripheral surface is wrapped so as to wrap around the outer peripheral surface, and the outer peripheral surface is provided with a pressure contact portion to which an elastic material is pressed, and an insulating rod attached to the distal end so that the pressure contact portion can be externally mounted on a rotary fastener at a remote position. The pressure contact portion is attached to the tip of the insulating rod so that the rotating shaft of the rotating fastener to be installed and the extending direction of the insulating rod coincide with each other.

  In this invention, the pressure contact portion at the tip of the insulating rod is placed on the rotating fastener, and the insulating rod is rotated while being urged in the extending direction, whereby the elastic material of the pressure contacting portion is evenly distributed on the outer peripheral surface of the rotating fastener. The rotary fastener can be rotated while being pressed and pressed. Accordingly, the rotary fastener is pressed and rotated about the rotation axis by the rotation of the press contact portion via the insulating rod without causing damage due to concentration of stress on a part thereof.

  According to a second aspect of the rotary tool for solving the above-mentioned problem, in addition to the specific matter of the first aspect, at least a portion of the pressure contact portion that is in pressure contact with the outer surface of the rotation fastener is made of a material that restricts sliding. It is characterized by being.

  In this invention, the rotary fastener can be rotated by being pressed so that the press contact portion does not slide on the outer peripheral surface of the rotary fastener. Accordingly, it is possible to easily rotate the rotary fastener by pressing the pressure contact portion against the rotary fastener with a smaller force than in the case where there is no slip restriction material.

  According to a third aspect of the rotary tool for solving the above-mentioned problems, in addition to the specific matter of the first or second aspect, the press contact portion has an inner peripheral surface substantially coinciding with the outer peripheral surface of the rotary fastener. The rotary fastener is fitted into the outer peripheral surface of the rotary fastener so as not to be relatively rotatable.

  In this invention, the rotary fastener can be rotated together with the pressure contact portion simply by fitting the inner peripheral surface of the pressure contact portion to the outer peripheral surface of the rotary fastener. Therefore, unlike the case where the rotary fastener can freely rotate relative to the rotary fastener, the rotary fastener can be easily rotated without forcibly pressing the pressure contact portion against the rotary fastener.

  According to a fourth aspect of the rotary tool for solving the above-mentioned problems, in addition to the specific matters of any one of the first to third aspects, the inner peripheral surface of the press contact portion is formed from the entrance side where the rotary fastener can be installed. It is formed in the inclined surface which inclines so that it may become narrow gradually toward the bottom side smaller than this rotation fastener.

  According to the present invention, even a rotary fastener having outer peripheral surfaces with different outer diameters can be rotated by pressing the inclined surface of the inner peripheral surface of the press contact portion. Therefore, it is possible to rotate the rotary fastener by pressing the pressure contact portion without exchanging it according to the size of the rotary fastener.

  According to a fifth aspect of the rotary tool for solving the above-mentioned problems, in addition to the specific matters of any of the first to third aspects of the invention, the inner peripheral surface of the pressure contact portion is provided with an inlet side on which a rotary fastener can be installed. A plurality of inclined ribs that gradually and gradually incline toward the bottom side smaller than the rotary fastener are formed.

  According to the present invention, even a rotating fastener having a deformed outer peripheral surface can be rotated by being pressed while deforming the inclined rib on the inner peripheral surface of the press contact portion. Accordingly, the rotating fastener can be rotated by pressing the pressure contact portion without exchanging it according to the shape and size of the rotating fastener.

  According to the present invention, it is possible to insulate from a remote position without damaging the rotary fastener by simply pressing and rotating the pressure contact portion over the rotation fastener via the insulating rod without damaging the rotary fastener due to the elastic material of the pressure contact portion. The rotation fastener can be rotated forward and backward while securing the above. Therefore, it is possible to easily perform the operation of securely tightening / releasing the rotary fastener of the high voltage device at a high place.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings. 1 to 3 are views showing a first embodiment of a rotating tool according to the present invention.

  In FIG. 1 and FIG. 2, the rotating tool is a tool used when connecting a wire by screwing a rotating fastener into a terminal portion of a high-voltage device installed at a remote position. A cup (pressure contact portion) 10 to be pressure-contacted and an insulating rod 20 for attaching the cup 10 to the tip end portion are assembled and used.

  For example, the rotating tool performs an operation of tightening / releasing by rotating the bushing 100A as a rotating fastener so that the male threaded portion (terminal portion) of the transformer 112 above the utility pole 111 shown in FIG. Designed to be able to. On the other hand, in the bushing 100A, as shown in FIG. 3, since a high voltage current flows through the transformer 112, the female screw portion 101 to be screwed into the male screw portion of the transformer 112 is made of ceramic which is an insulating material. It is produced in a state of being packaged by the exterior part 102A.

  The bushing 100A is manufactured by Company A so that the exterior portion 102A has a substantially hexagonal short column shape, and the exterior portion 102A includes a top portion 103A having a shape obtained by cutting off the corners of the hexagon, The flat part between the corner | angular parts (top part 103A) is depressed somewhat, and the hollow part 104A formed easily to hold is provided. The distance LA between the top portions 103A, which is the maximum outer diameter of the bushing 100A, is set to 49.5 mm.

  In addition, the rotating tool is not limited to the bushing 100A manufactured by Company A, and for example, the bushings 100B and C shown in FIG. 4 are also rotated and tightened so as to be screwed into the male screw portion of the transformer 112 as a rotating fastener.・ It is designed so that it can be released. The exterior of such a bushing has different external shapes depending on the manufacturing company. The bushing 100B shown in FIG. 4 (a) is manufactured by B company so that the exterior portion 102B is a short columnar shape having an approximately octagonal shape. The exterior portion 102B includes a top portion 103B and a hollow portion 104B. In addition, the distance LB between the top portions 103B is set to 62.3 mm. Similarly, the bushing 100C shown in FIG. 4B is manufactured by a company C manufactured in a substantially octagonal exterior portion 102C including a top portion 103C and a recess portion 104C. The exterior portion 102C is formed between the top portions 103C. The distance LC is set to 55.2 mm.

  The cup 10 includes a press-contact cup 11 that press-contacts the exterior portions (outer peripheral surfaces) 102 </ b> A-C of the bushings 100 </ b> A-C, an exterior cup 12 that detachably mounts (installs) the press-contact cup 11, and the exterior cup 12. And a joint 13 that is connected to the outer surface of the bottom portion and is attached to the tip of the insulating rod 20. The press-contact cup 11 is formed by molding a rubber material that can be press-contacted without sliding against any of the exterior cup 12 and the exterior portions 102A to 102C of the bushings 100A to 100C. Is manufactured by molding or cutting out an insulating material such as plastic, or connecting them (may be integrally molded).

  The press-contact cup 11 has an inner peripheral surface having a larger diameter than the dimension obtained by adding the thickness on the inlet side of the inclined rib 14 to be described later to the distance LB between the top portions 103B of the outermost exterior portion 102B among the bushings 100A to 100C. It is formed in a substantially cylindrical shape with a bottom having 11a. On the other hand, the exterior cup 12 is formed in a bottomed cylindrical shape having an inner surface with the same dimensions as the outer surface of the press-contact cup 11 so as to be in close contact with the outer surface (outer peripheral surface and bottom outer surface) of the press-contact cup 11. Yes.

  Further, on the inner peripheral surface 11a of the press-contact cup 11, inclined ribs 14 extending in the depth direction are formed integrally at positions corresponding to the recessed portions 104A of the exterior portion 102A of the bushing 100A, in other words, at six equally spaced locations. Has been.

  The inclined rib 14 is inclined so that the distance between the faces facing each other across the center of the inner peripheral surface 11a of the press-contact cup 11 gradually decreases from the inlet side to the bottom side of the press-fit cup 11. 14a, and is formed so that most of the bushings 100A to 100C can be accommodated between the inclined surfaces 14a (inside the press-contact cup 11). Specifically, the inclined rib 14 is set such that the facing distance We on the inlet side of the press-contact cup 11 is set larger than the distance LB between the top portions 103B of the outermost exterior portion 102B among the bushings 100A to 100C. The facing distance Wb on the bottom side of the cup 11 is set to be smaller than the distance WA between the recessed portions 104A of the smallest exterior portion 102A among the bushings 100A to 100C. At the same time, the inclined rib 14 ensures a large contact area with the outer peripheral surfaces of the exterior portions 102A to 102C of the bushings 100A to C by setting the dimensional difference between the facing distances We and Wb to be appropriately small. Designed to be able to.

  Thereby, the cup 10 can be internally provided so as to wrap the exterior portions 102 </ b> A to 102 </ b> C of the bushings 100 </ b> A to 100 </ b> C in the press contact cup 11. When the bushings 100A to 100C are pushed into the press-contact cup 11, the cup 10 is elastically deformed by the outer peripheral surfaces of the exterior portions 102A to 102C and is brought into pressure contact with the inclined surface 14a in a large area. The bushings 100 </ b> A to 100 </ b> C can be integrally rotated with a small force without causing stress to concentrate on a part and causing damage. In particular, in the bushing 100A, the inclined surface 14a of the inclined rib 14 can be fitted into the recessed portion 104A of the exterior portion 102B and can be evenly pressed, and it can be rotated without slipping against the rotation of the exterior cup 12, The female screw portion 101 is screwed into the male screw portion of the transformer 112 and tightened, or the tightening is released.

  Further, in the bushings 100B and C, the exterior portions 102B and the top portions 103B and C of the C and the recess portions 104B and C are 8 locations, whereas the inclined ribs 14 of the press contact cup 11 are 6 locations. As described above, the rib 14 is set to be larger than the distance LB between the top portions 103B where the facing distance We on the inlet side is maximum, and at the same time, the facing distance Wb on the bottom side is set smaller than the distance WA between the minimum depressions 104A. . Accordingly, the inclined rib 14 can be brought into close contact with the outer peripheral surfaces of the bushings 100B and C of the exterior portions 102B and C as appropriate, and slides with respect to the rotation of the exterior cup 12 similarly to the bushing 100A. The female screw portion 101 can be tightened and released from the male screw portion of the transformer 112 without rotating.

  That is, even if the cup 10 is different in size and shape from the bushing 100 </ b> A, the bushings 100 </ b> B and 100 </ b> C can be rotated as they are without replacing the press contact cup 11. In addition, since this press-contact cup 11 can be replaced | exchanged easily, it cannot be overemphasized that the inclination rib 14 may be replaced | exchanged for what was equally arrange | positioned in eight places so as to correspond to the hollow parts 104B and C.

  The joint 13 is open in the direction orthogonal to the bottom outer surface of the exterior cup 12, and can be attached by inserting the tip of the insulating rod 20 so as to extend in the orthogonal direction. Further, a pair of notches 13a that are notched toward the insulating rod 20 and then bent in the orthogonal direction are formed on the peripheral surface portion of the joint 13, and pins 21 of the insulating rod 20 described later are disposed in the notches 13a. It is possible to attach it so that it cannot be dropped off by making it enter the back of. In addition, in this FIG.1 (b), this notch 13a is formed in a pair by the front and back side with respect to a paper surface.

  As a result, the joint 13 is attached to the tip of the insulating rod 20 in a state in which the direction of the rotating shaft (female screw portion 101) of the bushings 100A to 100C accommodated in the press-contact cup 11 and the extending direction of the insulating rod 20 coincide. A cup 10 can be attached.

  On the other hand, the insulating rod 20 includes a pin 21 to be engaged with the notch 13a of the joint 13, a grip portion 22 on the base end side gripped by an operator, and umbrella covers 23 and 24 attached to intermediate portions. And the whole is made of an insulating material such as plastic to ensure insulation.

  The pin 21 is provided opposite to the side surface of the distal end portion of the insulating rod 20 and is fixed in a protruding shape on the opposite side, thereby entering into the two notches 13a of the joint 13 of the cup 10 and engaging. can do. The grip portion 22 is provided with a replaceable non-slip material made of a material that is difficult to slip. The umbrella covers 23 and 24 are disposed at two locations on the distal end side and the proximal end side in the intermediate portion, and the umbrella cover 23 on the distal end side drips moisture from the cup 10 side, and the umbrella cover 24 on the proximal end side. Shows the limit position where work can be performed safely, ensuring safety when working.

  Here, the insulating rod 20 is inserted into the notch 13a of the joint 13 after rotating both of the pins 21 while sinking against the elastic force of the spring incorporating the protrusion 25 at the tip. When the force to be released is released, the protrusion 25 protrudes due to the elastic force of the spring and pushes the joint 13, whereby the pin 21 can be engaged in the engagement groove 13b bent from the notch 13a in a non-detachable manner. In addition, the insulating rod 20 is rotated so that the grip 26 screwed into a screw shape engraved at the center portion is rotated toward the joint 13 so that the pin 21 is not detached from the engagement groove 13b and does not rotate. The cup 10 can be locked, and the cup 10 can be integrally rotated while reliably preventing the cup 10 from rotating and coming off.

  As a result, the grip portion 22 of the insulating rod 20 can be gripped, and the cup 10 can be brought into close proximity to the transformer 112 and the like installed at a high place such as the utility pole 111, so that the work can be safely performed. The bushing 100A-C is accommodated and pressed, and the insulating rod 20 is rotated forward and backward so that the female screw portion 101 of the bushing 100A-C is screwed to the male screw portion of the transformer 112. Can be tightened or released.

  As described above, in the present embodiment, the insulation is ensured from a remote position by simply rotating the cup 10 over the bushing 100A to C of the transformer 112 at a high place through the insulating rod 20 while rotating it. At the same time, the bushings 100A to 100C can be rotated forward and backward without damaging the exterior parts 102A to 102C due to elastic deformation of the press-contact cup 11, and the tightening / releasing operation can be performed safely and easily.

  As a first other aspect of the present embodiment, as shown in FIG. 5A, an inner peripheral surface (inclined surface) 31a in which the inclined surface 14a of the inclined rib 14 in the above-described embodiment is continuous in the circumferential direction. You may use the cup 30 which mounted | wore the exterior cup 12 with the press-contact cup 31 provided with. In this case, the inner peripheral surface 31a of the press-contact cup 31 can be pressed into the exterior portions 102A-C of the bushings 100A-C without much difference, and the bushings 100A-C are connected to the exterior cup 12 as in the above-described embodiment. The female screw portion 101 is screwed into the male screw portion of the transformer 112 and tightened, and the tightening can be released. In the above-described embodiment, the inclined rib 14 of the press-contact cup 11 can be largely deformed and pressed against the outer peripheral surface of the bushings 100A to 100C, whereas in the case of this first other aspect, the press-contact is performed. The inner peripheral surface 31a of the cup 31 is elastically deformed and brought into pressure contact with the outer peripheral surface on the head (opposite side of the female screw portion 101) side of the bushings 100A to 100C.

  As a second other aspect of the present embodiment, as shown in FIG. 5B, it is formed in a bottomed cylindrical shape like the press-contact cup 11 in the above-described embodiment, and instead of the inclined rib 14, You may use the cup 40 which mounted | wore the exterior cup 12 with the press-contact cup 41 by which the fitting rib 44 provided with the plane 44a facing in parallel was formed in the internal peripheral surface 41a. In this case, the fitting rib 44 of the press-contact cup 41 can be fitted into the recess 104A of the exterior portion 102A of the bushing 100A so as to be non-rotatably press-contacted. By rotating the cup 12 without sliding, the female screw portion 101 can be screwed into the male screw portion of the transformer 112 and tightened, and the tightening can be released. However, in the case of this second other mode, it is necessary to replace the press-contact cup 41 when performing tightening / releasing work of the bushings 100B, C. Here, the press contact cup 41 in which the flat surface 44a of the fitting rib 44 is formed to be partially similar to the outer peripheral surface of the exterior portion 102A and the bushing 100A is non-rotatably fitted is described. For example, it is needless to say that a press-fit cup that can be opened in a shape similar to the cross-sectional shape of the exterior portion and fitted in a relatively non-rotatable manner may be manufactured.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

It is a figure which shows the press-contact part of one Embodiment of the rotary tool which concerns on this invention, (a) is a perspective view which shows the schematic whole structure of the press-contact part, (b) is a partial longitudinal cross-sectional view of the press-contact part. . It is a top view which shows the schematic whole structure of the insulating rod of the embodiment. It is a figure which shows the rotation stopper of the rotation object, (a) is the top view, (b) is the longitudinal cross-sectional view. It is a top view which shows the rotation stopper different from FIG. It is a top view which shows the rotation stopper different from FIG. It is a partial longitudinal cross-sectional view which shows the 1st other aspect of the rotary tool. It is a partial longitudinal cross-sectional view which shows the 2nd other aspect of the rotary tool. It is an elevation view explaining the use location of the rotation stopper of the rotation object.

Explanation of symbols

10, 30, 40 Cup 11, 31, 41 Pressing cup 11a, 31a, 41a Inner peripheral surface 12 Exterior cup 13 Joint 14 Inclined rib 14a Inclined surface 20 Insulating rod 44 Inserting rib 44a Plane 100A to C Bushing 101 Female threaded portion 102A -C exterior part 103A-C top part 104A-C hollow part 111 telephone pole 112 transformer D electric wire

Claims (5)

A rotating tool that rotates a rotating fastener to be screwed into a terminal portion of a device installed at a remote position,
The rotary fastener is mounted so as to wrap around the outer peripheral surface around the rotation axis, and a pressure contact portion to which an elastic material is pressed against the outer peripheral surface, and the pressure contact portion is attached to the distal end of the rotary fastener at a remote position so as to be externally mounted. An insulating rod, and
A rotating tool characterized in that a pressure contact portion is attached to the tip of an insulating rod so that the rotating shaft of the internal rotating fastener and the extending direction of the insulating rod coincide.   The rotary tool according to claim 1, wherein at least a portion of the pressure contact portion that is in pressure contact with the outer surface of the rotary fastener is made of a material that restricts sliding.   The said press-contact part has an inner peripheral surface which substantially corresponds to the outer peripheral surface of a rotary fastener, and fits into the outer peripheral surface of this rotary fastener so that relative rotation is impossible. Rotating tool.   The inner peripheral surface of the press contact portion is formed on an inclined surface that is inclined so as to gradually become narrower from an inlet side where the rotary fastener can be installed to a bottom side smaller than the rotary fastener. The rotating tool according to any one of claims 1 to 3.   A plurality of inclined ribs are formed on the inner peripheral surface of the pressure contact portion so as to gradually and gradually incline toward the bottom side smaller than the rotary fastener from the entrance side where the rotary fastener can be installed. The rotating tool according to any one of claims 1 to 3.

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