JP2007124878A - Cable bracket type coping with earthquake - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid breakage of a cable, by allowing a bracket to turn about a vertical axis, relative to the support part of standing hardware or the like, to remove the extra length of a cable from the bracket at the occurrence of an earthquake, setting the extra length of the cable to be free, to quickly respond to the pulling direction of the cable. <P>SOLUTION: The cable bracket equipped with an upper surface plate part 1 has a constitution, including a lateral sleeve plate parts 2, 3 provided continuously on both sides of the upper plate part 1 and formed in an ascending slope so as to narrow their widths toward the end; and a rear-surface plate part 4, positioned at the fitting side of the standing hardware S fixed to the wall surface of a structure or the like and fixed between the lateral sleeve plate parts 2, 3. The rear surface plate part 4, formed into substantially a U-shaped cross section, has a cushioning rubber 6 interposed in between fixing hardware 5, that is fixed to the standing hardware S and formed into substantially a U-shaped cross section, and is fitted to the fixing hardware 5 (connected with a bolt 7 and a nut 8) so as to be turnable about the vertical axis. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an earthquake-resistant receiving device for a cable that is used to support a cable that is attached to a standing object fixed to a wall surface such as a structure (manhole).

  The metal fittings used for supporting the underground cables and the like attached to the wall surface of a manhole, etc. are an upper surface plate portion, left and right sleeve plate portions formed in an upward slope so as to narrow toward the front, and a rear surface plate. The upper surface plate portion serving as the cable receiving portion is provided with a concave portion along the length direction by drawing, while the rear surface plate portion is a metal fixture fixed to a wall surface such as a manhole. A structure having a fixing bolt insertion hole that is detachably inserted in a provided mounting hole (referred to as a dharma hole) is widely known among the parties, without needing to be exemplified. It has been.

  This well-known metal fitting is fixed to the metal stand by fastening the fixing bolt inserted into the insertion hole of the rear plate part into the attachment hole of the metal plate and then tightening the fixing bolt with the nut on the rear surface side. It is intended to be used by attaching to. And for supporting the cable drawn into the manhole from the pipe line, the cable extra length (usually the cable part horizontally laid in the shape of approximately 8 between the receiving hardware) is placed between the adjacent receiving hardware. In general, a method is adopted in which the cable is supported by the upper surface plate portions of the two metal fittings and the cable is fixed by a binding string such as a cotton string.

  If the cable is supported in a fixed state on the above-mentioned known metal receiving part at the extra length, if the cable is pulled into the duct due to movement of the duct at the time of an earthquake, the extra length cannot be moved, so the tension There has been a problem that the cable is often disconnected due to the excess.

  The present invention solves the above-mentioned problem, and its purpose is to bind the extra length of the cable to the receiver so that the receiver can be rotated around the vertical axis with respect to the support such as a stand. Even if an earthquake occurs, the bracket rotates in the direction in which the cable is pulled (left and right), and the cable is detached from the bracket with a tension below the tensile strength, leaving the extra length free and pulling the cable. The purpose is to provide an improved earthquake-resistant bracket for cables that can respond quickly to directions and avoid cable breakage.

  In order to achieve the above-mentioned object, an earthquake-resistant receiving bracket for a cable, which is a feature of the present invention, includes an upper plate, left and right sleeve plates connected to both sides of the upper plate, a structure, etc. In a cable bracket having a top plate portion and a rear plate portion fixed to the left and right sleeve plate portions located on the metal fixture side fixed to the wall surface, the rear plate portion is fixed to the metal fixture. A cushion rubber is interposed between the fixing bracket and the fixing bracket so that the fixing bracket can pivot around the vertical axis.

  In the configuration of the present invention, the rear plate portion of the receiving object and the fixing bracket are formed in a substantially U-shaped cross section corresponding to each other, and are fitted in a state where the fixing bracket is positioned on the inner side and the open surface side is opposed. A cushion rubber is interposed (press-fitted) into the fitting portion, and is pivotally attached so that relative rotation is possible by a bolt and a nut. A screw shaft (for example, a cutting bolt) is projected by welding on the back surface of the fixing metal so that the fixing metal can be fastened with a nut to the metal plate. Also, the front part of the horizontal plate part of the fixing bracket is formed on the arc edge, so that it does not cause a problem of contact with the rear part on the rear plate part side, so that there is no hindrance to the rotation of the receiving hardware. Yes.

  The seismic support bracket for the cable according to the present invention is such that when the earthquake occurs, the bracket can be rotated in the left-right direction, and the cable is pulled in the direction of rotation so that the cable binding portion is detached from the bracket, and the extra length The ring of the part is released and the cable can quickly respond to the pulling direction to prevent the cable from being cut.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 4, reference numeral 1 denotes an upper surface plate (for example, an iron plate having a length of about 260 ± 2 mm and a width of about 51 mm), and 2 and 3 are bent in a U-shaped groove shape in the length direction on the upper surface plate 1. The left and right sleeve plate portions 2 and 3 are connected to each other by providing a portion, and in the case of the figure, the left and right sleeve plate portions 2 and 3 are formed in an upward slope so as to become narrower toward the front. However, it is not limited to this. Reference numeral 4 denotes a rear plate portion fixed to the upper surface plate portion 1 and the left and right sleeve plate portions 2 and 3 by welding, and both sides of the upper surface plate portion 1 are formed in reinforcing portions 1a slightly bent downward. The upper surface plate portion 1 has an upward slope of about 2 ° toward the front.

  A rear plate (for example, an iron plate having a thickness of about 4.5 mm) 4 facing a standing metal (supporting part for receiving metal) S fixed on a wall surface of a structure or the like is formed in a substantially U-shaped cross section. The fixing bracket (for example, an iron plate having a thickness of about 4.5 mm) 5 fixed to the vertical object S has a substantially U-shaped cross section corresponding to the rear plate portion 4 and has a length of the rear plate portion. The width of the U-shaped cross section is about 30% smaller than that of the rear plate 4. The fixing bracket 5 and the rear plate portion 4 are fitted in a state where the fixing bracket 5 is positioned on the inner side and the open surface side is opposed, and after the cushion rubber 6 is press-fitted into the fitting portion, the rear plate portion 4 is fitted. The bolt 7 is inserted into the rear plate 4, the horizontal plates 4 a, 4 b, 5 a, 5 b of the fixture 5 and the cushion rubber 6 so that the fixture 5 can be relatively rotated, and the nut 8 is fixed.

  That is, the rear plate portion 4 is pivotally attached to the fixing bracket 5 with the cushion rubber 6 interposed so that the rear plate portion 4 can be rotated in both the left and right directions around the vertical axis (with the bolt 7 as a pivot). By fixing the screw shaft 9 such as a slicing bolt, which is fixed (for example, welded) to the back surface portion 5c, which protrudes laterally from the portions 5a and 5b (each about 10 mm to the left and right), the nut 11 is fixed to the vertical object S. This earthquake-resistant metal support can be supported so that it can be rotated by 90 ° in both the left and right directions (see FIG. 4).

  The cushion rubber 6 having a hardness of about 65 ± 5 ° can be used. The cushion rubber 6 is press-fitted between the rear plate portion 4 and the back portions 5c, 6c of the fixing bracket 5, and is always in the main holder. The hardware is held in a regular posture facing the front of the standing metal S. Further, the front portions of the upper and lower plate portions 5a and 5b of the fixing bracket 5 are formed on the arc edge 5d so as to eliminate contact with the rear surface portion 4c on the rear surface plate portion 4 side (the presence of the cushion rubber 6 makes it possible to A gap of about 1.0 mm is provided between the arc edges 5d), and it is considered that there is no hindrance to the rotation of the receiving metal. In the figure, reference numerals 12, 13 and 14 denote bolt insertion holes formed in the rear plate portion 4 and the horizontal plate portions 4a, 4b, 5a and 5b of the fixing bracket 5 and the cushion rubber 6, respectively.

  It is a top view which shows one Embodiment of this invention.   It is a side view of what is shown in FIG.   It is the perspective view which decomposed | disassembled what is shown in FIG.   It is a top view which abbreviate | omits and partially shows the rotation state of what is shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 is an upper surface board part 1a is a bending part 2, 3 is a sleeve board part 4 is a rear surface board part 4a, 4b is a horizontal board part 4c is a back surface part 5 is a fixing metal fitting 5a, 5b is a horizontal plate part 5c is a back surface part 5d is a circular arc Edge 6 is cushion rubber 7 is bolt 8 is nut 9 is screw shaft 11 is nut S is metal

Claims (4)

  The top plate, the left and right sleeve plates connected to both sides of the top plate, and the upper plate and the left and right sleeve plates are positioned on the side of the metal fixture fixed to the wall surface of the structure. In the cable bracket provided with the rear plate portion, the rear plate portion can be rotated around the vertical axis line by interposing a cushion rubber between the fixing member fixed to the standing metal piece. An earthquake-resistant bracket for a cable, characterized in that the fixing bracket is pivotally attached to each other.   The rear plate part of the receiving object and the fixing bracket are formed in a substantially U-shaped cross section corresponding to each other, and are fitted with the fixing bracket positioned on the inner side with the open side facing each other. 2. An earthquake-resistant metal support for a cable according to claim 1, wherein the cable is fitted with a bolt and a nut so as to allow relative rotation by press-fitting cushion rubber.   The cable-supported earthquake-resistant metal receiving device according to claim 1 or 2, wherein a screw shaft is provided on a rear surface portion of the fixed metal fitting so as to project the fixed metal fitting to a standing metal by fastening with a nut.   4. An earthquake-resistant receiving device for a cable according to claim 2, wherein the front portions of the upper and lower horizontal plate portions of the fixing bracket are formed at arc edges.

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