JP2017041977A - Fixture for crossarm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixture for a crossarm which facilitates a fastening operation by using an indirect hot-line tool.SOLUTION: The fixture comprises: band plate bodies 11 and 31 having an U-shaped form and fitted into a crossarm; and a fastening bolt 51 including an eyebolt 53 and a spindle 61 to which the eyebolt 53 is threaded, and bridging both ends at an opening side of the band plate bodies 11 and 31. In one end at the opening side of the band plate bodies 11 and 31, a bearing 39 is provided for holding the spindle 61 in a freely rotatable manner. In another end at the opening side, a notch 25 is provided into which the eyebolt 53 is fitted. The eyebolt 53 is rotatable around the spindle 61 held by the bearing 39. In the fastening bolt 51, rotations of the spindle 61 is blocked by the bearing 39 during fastening or opening.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mounting bracket for a brace used when fixing equipment to a brace of a utility pole.

  The poles include pole transformers that step down the voltage, high-voltage cutouts that protect the pole transformers, high-voltage lightning arresters that protect the cables from lightning damage, high-voltage pin insulators, etc. Mounted on the power pole. Among these, the high-voltage cutout and the high-voltage lightning arrester are attached to a brace (arm) via a mounting bracket.

  The typical mounting brackets used here consist of a main body made of a straight strip plate material and an L-shaped strip plate member, or a main body made of a pair of L-shaped strip plate materials, a tightening bolt, and a nut. The main body is fitted into the arm from the opened side, and finally the fastening bolts are hung on both ends of the band plate material on the opening side, and tightened with nuts to be fixed to the arm (see, for example, Patent Document 1) ).

  Many ideas have been proposed for mounting brackets to be attached to the brace. For example, there are mounting brackets (for example, refer to Patent Document 2) that can be used for armatures of different sizes, and mounting brackets that can be used for both cylindrical and box-type high-pressure cutouts. For example, see Patent Document 3).

Japanese Patent Laid-Open No. 11-346425 JP 2000-270452 A JP 2011-142730 A

  The mounting bracket is fixed to the arm using an indirect live tool (hot stick), and the bolts and nuts are usually tightened using a ratchet wrench attached to the tip of the indirect live tool. Is called. At the time of the tightening operation, a pressing force is applied to the nut (or bolt), so that the receiving-side bolt (or nut) is easily idled (turned). For this reason, when the nut (or bolt) is tightened, it is necessary to take measures such as pressing the receiving-side bolt (or nut) with an indirect hot wire tool so that the receiving side bolt (or nut) does not run idle, and the tightening operation takes time. Therefore, the development of a mounting bracket that can be easily mounted is awaited.

  An object of the present invention is to provide a bracelet mounting bracket that can be easily tightened using an indirect hot wire tool.

  The present invention has a U-shaped shape, and includes a belt plate body that fits into a bracelet, an eyebolt and a support shaft into which the eyebolt is screwed, and is hung on both ends of the belt plate body on the opening side. A fastening bolt that is passed, a bearing that rotatably supports the support shaft is provided at one end of the band plate body on the opening side, and the eyebolt is fitted into the other end on the opening side A notch is provided, and the eyebolt is rotatable about a support shaft held by the bearing. The tightening bolt prevents rotation of the support shaft at the time of tightening or opening. This is a mounting bracket for a brace.

  In the metal fitting for a brace according to the present invention, when the eyebolt is screwed onto a support shaft held by the bearing, the fastening bolt is integrated with the band plate body.

  Further, in the arm bracket mounting bracket according to the present invention, the eyebolt can be rotated by engaging an indirect live tool with a ring on the head.

  Further, in the arm bracket mounting bracket of the present invention, the belt plate body or the bearing is provided with a temporary fixing means for temporarily fixing the eyebolt with the opening of the belt plate body opened. To do.

  In the arm bracket mounting bracket of the present invention, when the tightening bolt is tightened or loosened, the bearing prevents rotation of the support shaft corresponding to the nut, so that it is not necessary to fix the support shaft with an indirect hot wire tool. In addition, eyebolts are used as the tightening bolts, and they can be easily tightened or loosened by hooking a bind hammer to the head ring. As described above, the arm bracket mounting bracket of the present invention is easy to tighten using an indirect hot wire tool, and can be easily attached to the arm metal.

  In addition, when the eyebolt is screwed onto the support shaft held by the bearing, the fastening bolt is integrated with the belt plate body. Such a metal fitting for a metal arm is convenient because it is not necessary to attach a tightening bolt to the band plate body fitted in the metal arm later when it is attached to the metal arm. In addition, since the tightening bolt can be rotated around the support shaft held by the bearing, the tightening bolt can be positioned so as not to block the opening of the band plate body. Thereby, when fitting the mounting bracket for the arm metal into the arm metal, the tightening bolt does not get in the way and is easy to use.

  Further, in the arm bracket mounting bracket of the present invention, by providing a temporary fixing means for temporarily fixing the eyebolt with the opening of the band plate body open, the arm bracket mounting bracket can be easily approached to the arm bracket, Usability increases.

It is a lineblock diagram of attachment metal fitting 1 for braces of a 1st embodiment of the present invention. FIG. 2 is a perspective view of a metal fitting for a brace 1 in FIG. 1. It is a figure which shows the state which attached the high voltage | pressure lightning arrester 111 to the armrest 101 using the metal fitting 1 for armrests of FIG. It is a block diagram of the attachment metal fitting 2 for a brace of 2nd Embodiment of this invention. FIG. 5 is a perspective view of the arm bracket mounting bracket 2 of FIG. 4. It is a figure which shows the state which attached the high voltage | pressure cutout 121 to the arm metal 101 using the arm bracket attachment metal fitting 2 of FIG. It is a block diagram of the attachment metal fitting 3 for a brace of 3rd Embodiment of this invention. It is a perspective view of the metal fitting for metal brace 4 of 4th Embodiment of this invention.

  FIG. 1 is a configuration diagram of a brace mounting bracket 1 according to a first embodiment of the present invention. FIG. 2 is a perspective view of the arm bracket mounting bracket 1 of FIG. 1, and FIG. 3 is a diagram showing a state in which the high-voltage lightning arrester 111 is mounted on the arm metal 101 using the arm bracket mounting bracket 1.

  The arm bracket mounting bracket 1 has a pair of belt plate bodies 11, 31 and a fastening bolt 51 for fixing the arm bracket mounting bracket 1 to the arm bracket 101. One is connected in an open U shape, and is used so that the fastening bolts 51 are hung over both ends of the opening. Hereinafter, each configuration will be described in detail.

  The band plate body 11 has an L shape in which a metal band plate having a certain width is bent at a right angle, and a square hole into which a round-root bolt (root bolt) 81 is inserted at one end. 23 are provided side by side, and a notch 25 into which the fastening bolt 51 is fitted is provided at the other end.

  The length of the band plate 11 is such that the length L1 from the bending point 19 to the inner square hole 23 is longer than the width La of the arm metal 101, and the length H1 from the bending point 19 to the end face 17 is the arm metal. The height Ha is set to be longer than 101.

  The notch 25 is provided in the shape of a long hole with a width slightly larger than the bolt diameter of the fastening bolt 51 from the end surface 17 toward the bending point 19. The outer end 27 of the notch 25 is open, and the length of the notch 25 is substantially the same as the height Ha of the arm metal 101 from the bending point 19 to the inner end 26 of the notch 25. It is set to become.

  The band plate body 31 has an L shape in which a metal band plate having a certain width is bent at a right angle like the band plate body 11. Two rectangular holes 24 through which the square root round head bolts 81 are inserted are provided in one end portion of the band plate body 31, and the support shaft 61 of the tightening bolt 51 is rotatably supported at the other end portion. A bearing 39 is provided.

  The length L2 from the bending point 37 to the inner square hole 24 is very short as the length of the strip plate body 31, and the strip plate body 11 and the strip plate body 31 are connected to the square holes 23 and 24 with rounded corner bolts. When 81 is inserted and connected, the distance L between the band plate 11 and the band plate 31 is set to be the width La + α1 of the arm metal 101. Here, α1 is a gap and is usually set to about 2 to 5 mm. In addition, the length from the end surface 15 of the strip plate body 11 to the square hole 23 and the length from the end surface 35 of the strip plate body 31 to the square hole 24 are the same.

  The length H2 from the bending point 37 of the band plate 31 to the center point 42 of the bearing 39 is set to the height Ha + α2 of the arm metal 101. Here, α2 is a value obtained by adding a margin of about 1 to 3 mm to half the bolt diameter of the fastening bolt 51.

  The bearing 39 is a cylindrical body having an inner diameter substantially the same as the outer diameter of the support shaft 61, and supports the support shaft 61 so as to be rotatable. In the bearing 39, a groove 46 into which the screw portion 54 of the tightening bolt 51 is fitted is provided in the circumferential direction at the center in the longitudinal direction. As a result, the fastening bolt 51 can rotate about 300 ° around the bearing 39 when the line connecting the bending point 37 of the belt plate 31 and the bearing center point 42 is 0 °.

  The bearing 39 is formed integrally with the strip plate body 31. Specifically, a slit hole serving as a groove 46 into which the threaded portion 54 of the fastening bolt 51 is fitted is provided at the end of the band plate body 31, and this is bent into a cylindrical shape on the square hole 24 side. . The method of providing the bearing 39 is not limited to this method. For example, the belt plate body 31 and the bearing 39 are separately manufactured and then fixed by welding or the like, and the end portion of the belt plate body 31 is cylindrical. A method of providing the groove 46 by cutting after bending may be employed, but the bearing 39 can be easily formed by adopting a method of bending the strip plate body 31 provided with slit holes.

  The tightening bolt 51 is a member for fixing the arm bracket mounting bracket 1 to the arm metal 101 and is connected to the bolt main body 53, the spring washer 57, and the bolt main body 53 so that the bolt main body 53 can be rotated. The support shaft 61 is supported.

  The bolt body 53 is a long eye bolt with a long hook under the neck. The screw portion 54 of the bolt main body 53 has only to have a screw length necessary for fixing the metal fitting 1 for the arm metal to the arm metal 101, and may be a half screw or a full screw. The bolt body 53 may be a combination of a long eye bolt and a washer having no wrinkles, and commercially available products may be used for the bolt body 53 and the spring washer 57.

  The support shaft 61 is a metal cylinder, and a screw hole 62 into which the screw portion 54 of the bolt main body 53 is screwed is provided so as to be perpendicular to the central axis and penetrate the cylinder. The diameter of the support shaft 61 is slightly smaller than the inner diameter of the bearing 39, and the length is the same as that of the bearing 39. The spindle 61 shown in the present embodiment uses a cylindrical body that is a solid material, but a cylindrical body that is a hollow material may be used, and a screw hole 62 may be provided in the cylindrical body.

  The fastening bolt 51 can be attached to the belt plate 31 by fitting the support shaft 61 into the bearing 39, aligning the positions of the groove 46 and the screw hole 62, and screwing the bolt body 53 into the screw hole 62.

  Next, a procedure for attaching the high-voltage lightning arrester 111 to the arm metal 101 using the arm metal mounting bracket 1 will be described.

  The high-voltage lightning arrester 111 is a known high-voltage lightning arrester that protects equipment and distribution line facilities from surges caused by lightning strikes, etc., and has a line-side terminal (not shown) at the top of the lightning arrester body 112 and a ground-side terminal 113 at the lower end. . A support band 114 is provided in the lower part.

  The support band 114 is formed of a hollow rectangular body, and two opposing faces are cut off at approximately half the longitudinal direction, and the remaining two faces are bent in an arc shape along the lightning arrester body 112 to form a mounting portion 115. Has been. The support band 114 applies the mounting portion 115 to the lightning arrester main body 112 and is fixed by a bolt 116. A square portion of the support band 114 serves as a mounting portion 117 to the arm bracket mounting bracket 1.

  The attachment portion 117 of the support band 114 is provided with a through hole (not shown) through which a bolt is inserted. The through hole and the square holes 23 and 24 provided in the band plate body 11 and the band plate body 31 are provided. The arm bracket mounting bracket 1 is attached to the high-voltage lightning arrester 111 through the round head bolt 81 and the nut 82 by aligning the positions. In this state, the arm bracket mounting bracket 1 is in the shape of an overturned U that is open at the bottom.

  The tightening bolt 51 has the support shaft 61 fitted into the bearing 39, and the bolt body 53 is screwed onto the support shaft 61. If the fastening bolts 51 are attached to the band plate body 31 in this way, it is not necessary to attach the bolts after fitting the metal fittings 1 for the arm metal into the arm metal 101, which is convenient.

  The arm bracket mounting bracket 1 to which the high-voltage lightning arrester 111 is attached is gripped with an indirect hot wire tool, and inserted into the arm metal 101 from above the arm metal 101 installed horizontally. At this time, the bolt main body 53 of the tightening bolt 51 is in a state where the ring portion 55 is hung downward in the vertical direction, so that it does not get in the way when the bracelet mounting bracket 1 is inserted into the bracelet 101.

  The arm bracket mounting bracket 1 is held in a state where the horizontal portion of the band plate body 11 is in contact with the upper surface of the arm metal 101, and a bind hammer is hooked on the ring portion 55 of the tightening bolt 51. The tightening bolt 51 is lifted in the horizontal direction with the bind hammer, the bolt body 53 is fitted into the notch 25, the bind hammer is rotated while pulling the tightening bolt 51 in the direction of the ring portion 55, and the tightening bolt 51 is tightened. Include. As a result, the arm bracket mounting bracket 1 can be firmly fixed to the arm bracket 101.

  The bind hammer is a tool used for tightening a ring of various tools and removing a cover. The bind hammer has a shape in which a tapered round bar is bent in a bowl shape, and is attached to the tip of an insulating operation bar. Unlike the conventional arm bracket mounting bracket, the arm bracket mounting bracket 1 shown in the present embodiment can be tightened with the tightening bolt 51 using a bind hammer, so that the tightening operation is simple. Further, when the tightening bolt 51 is tightened, the support shaft 61 corresponding to the nut is prevented from rotating by the bearing 39. For this reason, even if the support shaft 61 is not fixed with an indirect hot wire tool, the support shaft 61 does not rotate together with the bolt body 53, and the tightening operation is simple.

  FIG. 4 is a configuration diagram of the arm bracket mounting bracket 2 according to the second embodiment of the present invention. FIG. 5 is a perspective view of the arm bracket mounting bracket 2 of FIG. 4, and FIG. 6 is a diagram showing a state in which the high pressure cutout 121 is mounted on the arm metal 101 using the arm bracket mounting bracket 2. The same reference numerals are given to the same components as those of the arm bracket mounting bracket 1 of the first embodiment shown in FIG. 1 to FIG.

  The arm bracket mounting bracket 2 has the same basic configuration as the arm bracket mounting bracket 1, but the shapes of the band plate bodies 12 and 32 are different. Similarly to the arm bracket mounting bracket 1, the arm bracket mounting bracket 2 includes a pair of band plates 12 and 32, and a clamping bolt 51 that fixes the arm bracket mounting bracket 2 to the arm bracket 101. The band plate bodies 12 and 32 are connected in a U-shape with one opening, and are used so that the fastening bolts 51 are stretched around both ends of the opening.

  The band plate body 12 is a member that replaces the band plate body 11 of the arm bracket mounting bracket 1 according to the first embodiment, and is made of a metal band plate having a certain width in the same manner as the band plate body 11. The band plate 12 is provided with two bending points 21 and 22 in the vicinity of the square hole 23 through which the round-head bolt 81 is inserted, thereby forming a stepped portion, and a side where the square hole 23 is provided. The side where the notch 25 is provided is uneven and parallel.

  The band plate 12 may be linear without providing a stepped portion, but by providing the stepped portion, two patterns with respect to the band plate 32 can be provided. Specifically, if the front and back of the band plate 12 are turned over from the state shown in FIG. 4, the distance between the band plate 12 and the band plate 32 is reduced, and the band plate 12 is attached to the arm metal 101 having a different size. Can be used.

  As for the length of the strip plate 12, the length L3 from the bending point 21 to the end face 17 is set longer than the width La of the arm metal 101. The notch 25 is formed in the same manner as the notch 25 of the first embodiment.

  The band plate body 32 is a member that replaces the band plate body 31 of the arm bracket mounting bracket 1 according to the first embodiment, and is made of a metal band plate having a certain width in the same manner as the band plate body 31. Whereas the band plate body 31 is L-shaped, the band plate body 32 is further bent at a right angle in the vicinity of the square hole 24 so that the side on which the square hole 24 is provided and the side on which the bearing 39 is provided. It is uneven and parallel.

  The length L4 from the bending point 37 of the band plate body 32 to the center point 42 of the bearing 39 is set to the length La + α2 of the arm metal 101. Here, α2 is a value obtained by adding a margin of about 1 to 3 mm to half the bolt diameter of the fastening bolt 51. Further, the height H4 from the bending point 37 to the second bending point 38 of the band plate body 32 is a height at which the arm metal 101 enters with a slight gap in a state of abutting with the band plate body 12 as shown in FIG. Is set.

  In addition, in the arm bracket mounting bracket 2 of the second embodiment, the number of the square holes 23 and 24 through which the round-headed round head bolts 81 are inserted is one for each of the belt plate body 12 and the belt plate body 32. Similar to the arm bracket mounting bracket 1 of one embodiment, two or three or more may be provided.

  Next, a procedure for attaching the high-pressure cutout 121 to the arm metal 101 using the arm metal fitting 2 will be described.

  The high-voltage cutout 121 is a known box-type high-voltage cutout 121 that protects a transformer or the like from an overload or a short-circuit accident. The high-voltage cutout 121 has a discharge part 123 containing a ZnO element at the bottom of the cutout body 122, and discharges this when a surge current flows through the discharge member 124 provided on the opposite side of the discharge part 123. Let The discharge member 124 is formed integrally with a connection fitting 125 for attaching the cut-out main body 122 to the brace fitting 2.

  The connection fitting 125 is made of a metal band plate material, and is provided with an inclined portion 127 following the horizontal portion 126 so that the cutout main body 122 is inclinedly attached to the arm metal 101, and the end 128 of the inclined portion 127 is provided. It is bent and formed so as to face the discharge part 123. The cutout main body 122 is fixed to the inclined portion 127 with a screw.

  A through hole (not shown) through which the bolt is inserted is provided in the horizontal portion 126 of the connecting metal fitting 125, and the through hole and the square holes 23, 24 provided in the band plate body 12 and the band plate body 32. The arm bracket mounting bracket 2 is attached to the high-pressure cut-out 121 through the round head bolt 81 and the nut 82 by aligning the positions. In this state, the arm bracket mounting bracket 2 has a U shape with one side opened.

  Prior to mounting the arm bracket mounting bracket 2 to the arm bracket 101, the support shaft 61 is fitted into the bearing 39, the bolt body 53 is screwed to the support shaft 61, and the ring portion 55 of the tightening bolt 51 is connected to the square hole 24 side. Then, the bolt body 53 is rotated so that the bolt body 53 is placed on the band plate body 32 (see FIG. 5). In this state, the metal fitting for metal brace 2 to which the high-voltage cutout 121 is attached is gripped with an indirect hot wire tool and inserted into the metal arm 101 from the side of the metal arm 101 installed horizontally. At this time, the tightening bolt 51 is on the band plate body 32, so that it does not get in the way when the arm bracket attachment 2 is inserted into the arm metal 101.

  The arm bracket mounting bracket 2 is held in a state where the vertical portion of the band plate body 32 is in contact with the side surface of the arm metal 101, and a bind hammer is hooked on the ring portion 55 of the tightening bolt 51. Rotate 270 ° counterclockwise and fit the bolt body 53 into the notch 25. In this state, the fastening bolt 51 is hung from the bearing 39, so that the arm bracket mounting bracket 2 is firmly fixed to the arm metal 101 by hooking and rotating the bind hammer to the ring portion 55. can do.

  FIG. 7 is a configuration diagram of the arm bracket mounting bracket 3 according to the third embodiment of the present invention. The same reference numerals are given to the same components as those of the arm bracket mounting bracket 2 of the second embodiment shown in FIG. 4 to FIG.

  The arm bracket mounting bracket 3 is the same as the arm bracket mounting bracket 2 except for the shape of one band plate 33, and the basic configuration is substantially the same as the arm bracket mounting bracket 2.

  Similarly to the arm bracket mounting bracket 2, the arm bracket mounting bracket 3 also includes a pair of band plates 12 and 33, and a clamping bolt 51 that fixes the arm bracket mounting bracket 3 to the arm bracket 101. The band plate bodies 12 and 33 are connected so as to have a U shape with one opening, and are used so that the fastening bolts 51 are stretched around both ends of the opening.

  Except for the structure of the bearing 40, the other portions of the strip plate 33 are the same as the strip plate 32 of the brace mounting bracket 2 of the second embodiment. The bearing 39 provided in the band plate bodies 31 and 32 of the first and second embodiments has a circular cross section, but the bearing 40 has a long hole shape in cross section. Specifically, the space of the semicircle parts 44 and 45 slightly larger than the outer diameter of the support shaft 61 is provided at both ends, and a rectangular space part is formed at the center so as to connect the two semicircle parts 44 and 45. Is formed. The height of the central rectangular space is the same as the diameter of the semicircular portions 44 and 45.

  In the bearing 40 of the present embodiment, the lower part of the semicircular part 45 is not arcuate and is not strictly semicircular, but the lower part of the semicircular part 45 may be arcuate. The bearing 40 of the present embodiment has a linear shape below the semicircular portion 45 from the viewpoint of ease of processing, but there is no problem in terms of functionality. The length of the bearing 40, more specifically, the length of the central rectangular space portion needs to be a predetermined length. This point will be described later.

  The groove 46 into which the threaded portion 54 of the tightening bolt 51 provided in the bearing 40 enters is formed in the same manner as the bearing 39 of the first and second embodiments on the semicircular portion 44 side, and the central portion and the semicircular portion 45 side. Is provided in a portion excluding the bottom surface. In the present embodiment, the groove 46 is also provided on the central portion and the semicircular portion 45 side, but the groove 46 in this portion may be omitted.

  Similar to the bearing 39 of the first and second embodiments, the bearing 40 is provided with a slit hole serving as a groove 46 into which the threaded portion 54 of the tightening bolt 51 is fitted at the end of the band plate body 33. It is formed by bending so that a long hole is formed on the 24 side. The method of providing the bearing 40 is not limited to this method. For example, the belt plate 33 and the bearing 40 are separately manufactured and then fixed by welding or the like. A method of providing the groove 46 by cutting after bending may be adopted, but the bearing 40 can be easily formed by adopting a method of bending the strip plate body 33 provided with slit holes.

  When attaching the arm bracket mounting bracket 3 to the arm metal 101, prior to the attachment, the support shaft 61 is fitted into the bearing 40, the bolt body 53 is screwed onto the support shaft 61, and the tightening bolt 51 is half of the bearing 40. Push it all the way to the circle 45 side. In this state, the tightening bolt 51 has a threaded portion 54 that rides on the upper surface of the band plate body 33, and the arm bracket mounting bracket 3 is open on one side. The attached bolt 51 does not get in the way.

  In a state where the fastening bolt 51 is fully pushed into the semicircular portion 45 side of the bearing 40, a part of the ring portion 55 and the bolt portion 54 of the fastening bolt 51 protrudes from the end portion of the band plate body 33. . Further, since the bolt main body 53 is attached to the support shaft 61, the bolt main body 53 is slightly lower on the semicircular portion 44 side than on the semicircular portion 45 side. Therefore, when attaching the metal fitting 3 for the arm metal to the arm metal 101, the ring portion 55 of the fastening bolt 51 may be brought into contact with the upper surface of the arm metal 101 and then moved in the horizontal direction.

  After the arm bracket fitting 3 is fitted into the arm bracket 101, the bind hammer is hooked on the ring portion 55 of the tightening bolt 51, and the tightening bolt 51 is horizontally moved to the semicircular portion 44 side. Thereafter, the tightening bolt 51 is moved in the vertical direction and tightened.

  As described above, since the fastening bolt 51 needs to be placed on the upper surface of the band plate body 33 prior to attaching the metal fitting 3 for the arm metal to the arm metal 101, the length of the bearing 40 is at least the fastening bolt. A length that allows 51 to be stably placed on the upper surface of the belt plate 33 is required. Further, when the bolt body 53 is placed on the upper surface of the strip plate body 33 because the bolt body 53 is attached to the support shaft 61, the semicircle portion 44 side is compared with the semicircle portion 45 side. The length of the bearing 40 is preferably determined in consideration of a slightly lower point.

  FIG. 8 is a perspective view of the arm bracket mounting bracket 4 according to the fourth embodiment of the present invention. The same reference numerals are given to the same components as those of the arm bracket mounting bracket 2 of the second embodiment shown in FIG. 4 to FIG.

  The arm bracket mounting bracket 4 is the same as the arm bracket mounting bracket 2 of the second embodiment, except that the bearing 41 is provided with a locking groove 48 in which the bolt body 53 of the tightening bolt 51 can be locked. It is a configuration.

  The bearing 41 of the arm bracket mounting bracket 4 is provided with a locking groove 48 for holding the fastening bolt 51 horizontally on the tip end side (the side opposite to the square hole 24). The locking groove 48 is formed by a method of facing the groove 46 and providing a cut in the longitudinal direction, and the groove 46 and the locking groove 48 communicate with each other. The installation height of the locking groove 48 is the center point of the bearing 41, and the size is such that the threaded portion 54 of the tightening bolt 51 is fitted.

  When attaching the arm bracket mounting bracket 4 to the arm metal 101, prior to mounting, the support shaft 61 is fitted into the bearing 41, the bolt body 53 is screwed into the screw hole 62 of the support shaft 61, and the tightening bolt 51 is further tightened. The threaded portion 54 is hooked on the locking groove 48 of the bearing 41. Since both ends of the bearing 41 are open in the longitudinal direction, the support shaft 61 and the bolt body 53 can be moved integrally in the longitudinal direction of the bearing 41. When the bolt main body 53 is hooked on the locking groove 48, the bolt main body 53 is held horizontally, and the arm bracket mounting bracket 4 is in a state where one side is open. 51 does not get in the way.

  The arm bracket mounting bracket 4 is held in a state where the vertical portion of the strip plate body 32 is in contact with the side surface of the arm metal 101, and a binding hammer is hooked on the ring portion 55 of the tightening bolt 51. When moved to the groove 46 side, the bolt body 53 enters the groove 46. Thereafter, the tightening bolt 51 is rotated 90 ° counterclockwise, the bolt main body 53 is fitted into the notch 25, and then the tightening bolt 51 is tightened by rotating the ring portion 55 via the bind hammer.

  As described above, the arm bracket mounting bracket according to the present invention differs from the conventional arm bracket mounting bracket in that the support shaft 61 functions as a bolt receiver instead of a nut, and the support shaft 61 is connected to the bearings 39, 40, 41. Since it is held, the support shaft 61 does not rotate together with the bolt body 53, and the tightening operation is simple. Further, the tightening bolt 51 is easy to use because it is not necessary to attach and remove it from the brace fitting. Further, since the tightening bolt 51 can be tightened using a bind hammer, the tightening operation is simple.

  Further, the arm bracket mounting bracket according to the present invention can temporarily fix the bolt body 53 so that the tightening bolt 51 does not get in the way when the arm bracket mounting bracket is inserted into the arm bracket. Specifically, in the arm bracket mounting bracket 2 of the second embodiment, the upper surface of the band plate body 32 is the same, and in the arm bracket mounting bracket 3 of the third embodiment, the band plate body 33 and the bearing 40 are the fourth embodiment. In the arm bracket mounting bracket 4 according to the embodiment, the locking groove 48 is a temporary fixing means for temporarily fixing the bolt main body 53.

  The bolt body 53 may be temporarily fixed by other methods, but a simple structure with high durability and reliability is preferable. The temporary fixing means for the bolt body 53 shown in the present embodiment has a simple structure and is excellent in durability and reliability. If the bolt main body 53 is temporarily fixed through such a temporary fixing means with the opening of the band plate opened, the approach to the arm metal 101 of the arm metal mounting bracket is facilitated, and the usability is further increased.

  As described above, the arm bracket mounting bracket according to the present invention has been described using the arm bracket mounting bracket according to the first to fourth embodiments, but the arm bracket mounting bracket according to the present invention is limited to the above embodiment. It can be changed without changing the gist.

  For example, a bent portion may be provided at the outer end portion 27 of the notch 25 provided at the end portion of the band plate body in order to prevent the tightening bolt 51 from being loosened or dropped off. In addition, the notch 25 may be configured such that the outer end portion 27 is widened and the fastening bolt 51 is easily guided into the notch 25. In the above-described embodiment, the bind hammer is used for the tightening operation of the tightening bolt 51. However, the tightening bolt 51 can also be tightened by using an insulating yarn that is one of indirect hot wire tools.

1, 2, 3, 4 Bracket mounting brackets 11, 12 Band plate body 17 End face 25 Notches 31, 32, 33, 34 Band plate bodies 39, 40, 41 Bearing 46 Groove 48 Locking groove 51 Tightening bolt 53 Bolt body 55 Ring portion 61 Support shaft 62 Screw hole 101 Arm metal 111 High voltage lightning arrester 121 High pressure cutout

Claims (4)

A band plate body having a U-shape and fitting into a brace;
An eyebolt and a support shaft to which the eyebolt is screwed, and a tightening bolt that spans both ends on the opening side of the band plate body,
A bearing that rotatably holds the support shaft is provided at one end on the opening side of the band plate body, and a notch into which the eyebolt is fitted is provided at the other end on the opening side.
The eyebolt is rotatable around a support shaft held by the bearing,
The armature mounting bracket according to claim 1, wherein when the tightening bolt is tightened or released, rotation of the support shaft is prevented by the bearing.   The armature mounting bracket according to claim 1, wherein when the eyebolt is screwed onto a support shaft held by the bearing, the fastening bolt is integrated with the band plate body.   The arm bracket mounting bracket according to claim 1, wherein the eyebolt is rotatable by locking an indirect hot wire tool on a ring of a head.   The temporary fixing means which temporarily fixes the said eyebolt in the state which opened the opening part of the said strip plate body in the said strip plate body or the said bearing is provided. The metal fitting for metal brazing according to item 1.

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