JP6348403B2 - Construction method of soundproof wall for elevated - Google Patents

Description

The present invention relates to a method for constructing an elevated soundproof wall using a mounting bracket.

  There are cases where it is desired to attach various articles to the wall or pillar of a building. As an example, there is a case where a wire is stretched on a wall surface.

  For example, as disclosed in Patent Document 1 and Patent Document 2, a soundproof wall is employed in an elevated train, a monorail, a highway, or the like. The soundproof wall includes a plurality of pillars standing at a predetermined interval and a soundproof panel installed between the pillars. Each pillar is erected on a concrete pillar side wall. In order to reinforce a plurality of pillars and prevent the soundproof panel from dropping, a soundproof wall may be provided with a wire. In the case where a wire is provided on a soundproof wall, conventionally, a hole through which an article (for example, a wire) is directly inserted is formed in the pillar.

  In addition, as a measure for attaching various articles to the building, it is also assumed that an attachment fitting including an eyebolt or the like is provided. Patent Document 3 discloses a technique for attaching an eyebolt to an existing concrete wall surface. In the eyebolt according to the technology, the engagement portion that engages with the mounted body and the bolt are integrally formed. Further, a nut to which the eyebolt is screwed is provided in a main part of the building. A cylinder is provided under the nut. A tapered surface is formed on the inner periphery of the lower part of the cylinder so that the lower side is thinner. Moreover, the lower part of a cylinder is comprised by the some slit formed in the axial direction so that expansion is possible. On the other hand, the bolt fixed to the eyebolt is provided with a conical portion joined to the tapered surface. When the bolt of the eyebolt is screwed and the conical part is lowered, the conical part pushes down the tapered surface and expands the lower part of the cylinder.

JP2013-155575A JP 2013-170382 A Japanese Utility Model Publication No. 42-6832

  However, the operation of forming a hole through which an article (for example, a wire) is directly inserted into a building is not easy and workability is poor. In particular, when the article is relatively large, it is necessary to make the diameter of the insertion hole to be perforated relatively large. Therefore, there is a problem that affects the strength of the building, which is not preferable.

  On the other hand, in the technique disclosed in Patent Document 3, it is possible to fix the eyebolt to a wall portion or the like by inserting a cylinder into the bottomed hole and rotating the eyebolt. However, in the technique disclosed in Patent Document 3, since the engaging portion of the eyebolt and the bolt are integrally formed, it is necessary to directly drive the engaging portion. Further, as the bolt is screwed together, the mounting position of the hook body moves to the nut side. For this reason, it is difficult to set the mounting posture of the engaging portion constant. Therefore, it is difficult to attach the article, and there is a risk that convenience may be reduced.

The present invention has been made in view of the above-described problems, and uses a mounting bracket that can always set the mounting posture of the engaging portion to be constant, has high workability, and has a small mounting site restriction . that provides a method of constructing the elevated for a soundproof wall.

What is used in the present invention is a mounting bracket for mounting a body to be attached to a plate-like portion having a front surface and a back surface, which is a main part of a building, and can be engaged with the body to be mounted. A metal fitting body that has an engagement portion and is arranged on the surface of the attachment main portion, and is connected to the metal fitting main body, and from the front surface side to the back surface side with respect to the insertion hole formed in the attachment main portion. An expanded body having a shape that can be inserted into the tube and that can be expanded radially outward by receiving pressure from the inside, and an axial direction of the expanded body And a bolt that is rotatably held by the metal fitting body, and a nut that is screwed to the bolt. The bolt includes a head that receives a rotation operation, and a screw that is screwed to the nut. A threaded portion, and the head is a surface of the metal fitting body. The nut is held in the metal fitting body so that at least a part of the threaded portion is located inside the expansion body, and the nut is expanded in a state where relative rotation with respect to the expansion body is restricted. The bolt is arranged on the inside of the body, and is displaced in a direction approaching the metal fitting body as the bolt rotates in a specific direction, thereby pressing the expansion body from the inside to expand the expansion body. It is a mounting bracket that is screwed together.

  In this aspect, by inserting the engaging portion from one surface of the building and operating the bolt to tighten the nut to the engaging portion side, the expanding body can be expanded and the mounting bracket can be fixed. . Therefore, it is not necessary to form a hole for inserting an article directly into a building, and workability is significantly improved. Moreover, since the engaging portion and the bolt are relatively rotatably coupled, it is not necessary to directly drive the engaging portion when operating the bolt. Therefore, the mounting position of the engaging portion does not shift after the bolt is tightened, and the posture of the engaging portion can be easily set uniformly. Therefore, it is easy to attach the article. Moreover, since the metal fitting main body and the expanded body are connected, the operation of mounting the expanded body on the main mounting portion is facilitated. Moreover, it becomes easy to unitize a metal fitting main body, a volt | bolt, an expansion body, and a nut, and handling becomes still easier.

  In the mounting bracket according to a preferred aspect, a plurality of slits arranged in the circumferential direction are formed in the expansion body, and each of the slits extends in the axial direction and has a plurality of divided pieces arranged in the circumferential direction. And the divided pieces are deformed radially outwardly independently of each other, thereby enabling the expanding body to expand, and the outer peripheral surface of the nut is at least a part of the plurality of slits. A rotation preventing portion that prevents relative rotation of the nut with respect to the spreader body by fitting with the slit. In this aspect, the locking piece of the expanding body can be expanded while preventing the rotation of the nut at the time of tightening with an easily manufactured structure without adding special parts.

  In a preferred embodiment of the mounting bracket, the outer peripheral surface of the nut has a polygonal cross section having the same number of vertices as the slit, and has a ridge line that can be fitted to each of the slits. In this aspect, each locking piece can be spread evenly from the nut, and the expanded body can be expanded into a stable shape, so that a firm stopping force can be obtained.

  In a preferred embodiment of the mounting bracket, the outer peripheral surface of the nut has a taper that extends in the direction away from the bracket body. In this aspect, the locking piece can be expanded with an easily manufactured shape.

  In a preferred embodiment of the mounting bracket, the nut has a polygonal frustum shape in which the cross section of the nut increases as the distance from the bracket body increases. In this aspect, coupled with the fact that the outer peripheral surface of the nut has a polygonal cross section having the same number of vertices as the slits, it is possible to further prevent the rotation of the nut with a shape that is easier to manufacture, while expanding the body. The locking piece can be expanded.

  In a preferred embodiment of the mounting bracket, the plurality of locking pieces are formed of a material that is plastically deformed when expanded. In this aspect, the mounting bracket once fixed cannot be removed after the construction, and an anti-theft function can be achieved.

In the present invention , a side wall provided on a side edge of the bridge girder along the longitudinal direction of the bridge girder and a plurality of pillars standing on the side wall at intervals in the longitudinal direction of the bridge girder And a soundproof panel mounted between the plurality of pillars, a plurality of mounting brackets fixed at appropriate positions of the pillar, and at least one wire connecting the plurality of pillars via the mounting bracket. An elevated soundproof wall provided, wherein each mounting bracket comprises the mounting bracket.

In this elevated soundproof wall , a plurality of pillars are connected by wires, so that the possibility of falling off the pillars themselves and the soundproof panels arranged between the pillars is reduced. Moreover, the plurality of mounting brackets provided on the pillar can fix the mounting bracket by expanding the locking piece with the nut by operating the bolt from the bracket body side and tightening the nut to the bracket body side. . Therefore, even if the mounting location of the mounting bracket is the main part of the existing building, the operation from the back side of the building is not required, and the mounting work is greatly facilitated.

  In the elevated soundproof wall according to a preferred aspect, the at least one wire includes a first wire supported by a mounting bracket fixed in the vicinity of the side wall of the pillar, and a mounting bracket that supports the first wire. And a second wire supported by a mounting bracket fixed to the pillar on the upper side. In this aspect, the two upper and lower portions of the pillar are connected by the first wire and the second wire, so that they are reinforced more firmly.

The present invention provides a method for constructing the elevated soundproof wall. In this method, the lower part of each of the plurality of pillars is joined to the outer surface of the side wall and fixed so that the upper part of the pillar protrudes upward from the side wall. A step of standing a plurality of pillars at intervals in a direction, a step of inserting a soundproof panel between pillars adjacent to each other among the plurality of pillars, and a plurality of mounting brackets, Attaching a wire for connecting the pillars to each other and suppressing relative displacement between the pillars, and the step of attaching the wire includes a step of forming an insertion hole in a lower portion of each pillar. as each of the plurality of mounting brackets, has an engaging engagement portion to the pillar, a fitting main body that is disposed on the surface of the lower portion of the pillar, when coupled to the fitting body DOO Further, a shape that can be inserted into the insertion hole from the outside of the side wall to the inside, and that can be expanded radially outward by receiving pressure from the inside. An expanded body, a bolt that is inserted along the axial direction of the expanded body and that is rotatably supported by the metal fitting body, and a nut that is screwed to the bolt. A head portion that receives a rotation operation, and a threaded portion that can be screwed into the nut, wherein the head portion is exposed on a surface of the metal fitting main body, and at least a part of the threaded portion of the expanding body. The nut is held by the metal fitting body so as to be located inside, and the nut is disposed inside the expanded body in a state in which relative rotation with respect to the expanded body is restricted, and with the rotation of the bolt in a specific direction. By displacing in the direction approaching the bracket body A mounting bracket that is screwed with the bolt so as to expand the expanded body by pressing the expanded body from the inside is prepared, and the expanded body of the mounting bracket is inserted into the insertion hole from the outside of the side wall. And rotating the bolt head from the surface of the mounting body of the mounting bracket to advance the nut of the mounting bracket in a direction approaching the mounting body, thereby expanding the expanding body. A step of fixing the metal fitting body on the lower surface of the pillar, and a step of inserting the wire into the metal fitting body of each of the attachment fittings.

  In this aspect, the installation can be completed by attaching the mounting bracket from one surface of the elevated soundproof wall (for example, outside the bridge girder) and inserting the wire. In other words, when a wire is stretched on one surface of the elevated soundproof wall, there is no need to process from the other surface. Therefore, workability is greatly improved.

  As described above, according to the present invention, the mounting posture of the engaging portion can be always set constant, the workability is high, and the restriction on the mounting portion when mounting the mounting bracket can be reduced. There is a remarkable effect of being able to.

  Further features, objects, configurations, and advantages of the present invention will be readily understood from the following detailed description that should be read in conjunction with the accompanying drawings.

It is a perspective view of the attachment metal fitting concerning one embodiment of the present invention. It is an exploded view of the mounting bracket of FIG. It is one side view of the attachment metal fitting of FIG. It is explanatory drawing which shows the attachment process of the attachment metal fitting of FIG. It is explanatory drawing which shows the state after the attachment of the attachment metal fitting of FIG. It is a cross-sectional view of the mounting bracket of FIG. 1 is a schematic cross-sectional partial view of a viaduct according to an embodiment of the present invention. It is a front schematic diagram which shows a part of soundproof wall employ | adopted as the viaduct of FIG. It is a plane partial schematic diagram which shows the principal part of the noise barrier of FIG.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  First, the mounting bracket 10 will be described.

  1 to 4, the mounting bracket 10 according to the present embodiment includes an eyebolt 1 and a nut 3.

  In the illustrated example, the eyebolt 1 includes a metal fitting body 11, a bolt 12, and a connecting body 13. Usually, the metal fitting body 11 and the bolt 12 are integrally formed. However, in the eyebolt 1 of the present embodiment, the metal fitting body 11 and the bolt 12 are connected so as to be relatively rotatable. The metal fitting body 11 is a metal product having an annular engaging portion 14 and a boss portion 15 provided integrally with the engaging portion 14. In the following description, the bracket body 11 side of the bolt 12 of the eyebolt 1 is one end side, and the free end side of the bolt 12 is the other end side.

  The metal fitting body 11 is formed of a steel material such as stainless steel.

  The engaging portion 14 has a shape obtained by rounding a bar material into a circle. The engaging part 14 is formed in various sizes according to the application. Although the cross section of the rod-shaped part of the engaging part 14 is circular, it is not necessary to limit to it. Further, the engaging portion 14 may have a hook shape partially opened.

  The boss portion 15 is a cylindrical portion whose axial center extends in the radial direction of a circular portion defined by the engaging portion 14.

  One end side of the boss portion 15 is formed in a tapered shape that is thinner than the other end side. A female screw 16 is screwed on the inner periphery of the boss portion 15. The female screw 16 penetrates the entire length of the boss portion 15. Further, a screw hole 17 is formed in the boss portion 15 along one diameter direction. The screw hole 17 is screwed with a hexagon socket head set screw 5 that prevents rotation from both sides. In the illustrated example, the screw hole 17 is formed in parallel with the arc center of the engaging portion 14.

  The connection body 13 is a substantially cylindrical metal member. One end of the coupling body 13 is constituted by a male screw 20 that is screwed into the female screw 16 of the boss portion 15. When the male screw 20 of the coupling body 13 is screwed into the female screw 16 of the boss portion 15, the surface on one end side of the male screw 20 is substantially flush with the surface on one end side of the boss portion 15, and the other end portion of the male screw 20 is the boss portion. The specifications of the male screw 20 and the boss 15 of the coupling body 13 are set so as to be buried in 15. In the illustrated example, an insertion hole 22 is formed in the male screw 20. The insertion hole 22 faces the screw hole 17 formed in the side portion of the threaded portion 15 when the male screw 20 is screwed into the boss portion 15. The insertion hole 22 penetrates the male screw 20 along one diameter direction. As shown in FIG. 4, the male screw 20 has a communication hole 23. The communication hole 23 passes through the entire length of the male screw 20. An annular groove 24 having a diameter larger than that of the communication hole 23 is formed concentrically on one end side of the male screw 20. The annular groove 24 constitutes a receiving seat on which the head of the bolt 12 described later is seated.

  The other end of the connecting body 13 constitutes an expanded body 21. The expansion body 21 is a cylindrical member that is inserted into an insertion hole W1 formed in an attachment main part (for example, wall) W of a building. The expanded body 21 is divided into a plurality of locking pieces 21a. Each locking piece 21a defines a plurality of slits S extending in the axial direction. The plurality of locking pieces 21a is, for example, eight. Note that the number of the locking pieces 21a is arbitrary, and may be two or six, for example.

  Grooves along the circumferential direction are formed on the outer peripheral surface of each locking piece 21a. The groove is formed in a sawtooth waveform in which one end side is recessed vertically and the other end side is inclined radially outward of the coupling body 13. For this reason, the outer periphery of each locking piece 21a forms an edge that divides the ridge line in the circumferential direction.

  The nut 3 is disposed on the other end side of the coupling body 13. The cross section of the nut 3 is formed in a regular polygon (an octagon in the illustrated example) having a vertex for each number of slits S. One end side of the nut 3 is set to have a smaller diameter than the other end side, and is formed in a polygonal frustum shape having a taper extending in a direction away from the metal body 11. Therefore, the nut 3 enters the space surrounded by the respective locking pieces 21a in a state where the respective ridge lines 31 are opposed to the respective slits S, and can be engaged with the respective locking pieces 21a. . Further, each ridge line 31 constitutes a rotation preventing portion that prevents relative rotation of the nut 3 with respect to the expanded body 21 by engaging with at least a part of the slits S. Therefore, when the nut 3 is tightened to one end side by the bolt 12 described below, the nut 3 clamps the mounting main part and the expanding body 21 between the fitting main body 11 of the eyebolt 1. By the tightening force at this time, the nut 3 expands each locking piece 21a in a wedge shape.

  The bolt 12 in the illustrated example is a hexagon socket head cap screw. The bolt 12 has a threaded portion 40. The screw portion 40 is inserted into the communication hole 23 from one end side of the connection body 13. A head 41 is formed at one end of the screw portion 40. The head 41 is seated in the annular groove 24. Further, the nut 3 is screwed to the other end side of the screw portion 40. A pin hole 42 is formed in the vicinity of the other end of the screw portion 40 along the one-diameter direction of the screw portion 40. At the time of assembly, the pin hole 42 opens on the other end side with respect to the nut 3 screwed into the screw portion 40. The split pin 6 is fitted into the pin hole 42.

  When assembling each component of the mounting bracket 10, first, the screw portion 40 is inserted into the coupling body 13, and the nut 3 is screwed into the screw portion 40. Next, after the split pin 6 is inserted into the pin hole 42, the tip portion of the split pin 6 is bent. Thereby, the split pin 6 is prevented from coming off and the split pin 6 prevents the nut 3 from being screwed off from the screw portion 40. Thereafter, the male screw 20 of the connecting body 13 is screwed into the boss portion 15 of the eyebolt 1 to complete the assembly. As a result, the mounting bracket 10 can be assembled as shown in FIG. At this stage, the hexagon socket set screw 5 is not yet tightened.

  Next, a construction example of the mounting bracket 10 will be described.

  With reference to FIG. 4, for example, when attaching the mounting bracket 10 to a wall W of a building, first, an insertion hole W <b> 1 through which the connecting body 13 and the like are inserted is formed in the wall W. Next, the other end side of the mounting bracket 10 assembled in the state of FIG. 1 is inserted into the insertion hole W1, and the engaging portion 14 of the eyebolt 1 is joined to the wall W as shown in FIG. Thereafter, the head 41 of the bolt 12 is operated with a wrench (not shown) and tightened in a specific direction in which the nut 3 moves to one end side (for example, clockwise when viewed from the front side of the wall W). The nut 3 receives a force that rotates in a predetermined direction from the bolt 12, but the rotation of the nut 3 is prevented because the ridge lines 31 enter the slits S formed between the locking pieces 21 a. Therefore, the nut 3 receives the twisting force of the bolt 12 and moves to one end side.

  On the other hand, the other end side of the nut 3 is formed to have a larger diameter than the one end side, so that the nut 3 functions as a wedge for expanding each locking piece 21a. As a result, as the nut 3 moves to one end side, each locking piece 21a expands outward in the radial direction of the coupling body 13, and the surface ridge line is inserted into the hole W1 as shown in FIG. Plastically deformed. As a result, the mounting bracket 10 is firmly fixed to the wall W.

  Thereafter, as shown in FIG. 6, the hexagon socket set screw 5 is screwed into each screw hole 17. Thereby, the hexagon socket set screw 5 tightens the bolt 12 through the insertion hole 22 formed in the male screw 20 of the coupling body 13 to prevent rotation. As a result, the mounting bracket 10 can be firmly fixed to the wall W over a long period of time.

  Next, a construction example of the mounting bracket 10 will be described.

  With reference to FIGS. 7 to 9, the illustrated example shows an example in which the mounting bracket 10 is attached to the soundproof wall 80 of the viaduct 70. The viaduct 70 may be for vehicles like a highway, or may be a viaduct of a train or a monorail.

  The viaduct 70 has a side wall 71 at the side edge. The side wall 71 is a concrete structure formed integrally with the bridge girder 72 along the longitudinal direction of the viaduct 70.

  A number of pillars 73 are erected on the side wall 71 at intervals in the longitudinal direction. As shown in FIG. 9, the pillar 73 is an H-shaped steel. The pillar 73 is disposed such that its lower part is joined to the outer surface of the side wall 71 and its upper part projects upward from the side wall 71.

  Each pillar 73 is formed by integrating a pair of flat plate portions 73a and 73b and a connecting portion 73c that connects both flat plate portions 73a and 73b so that the end face is H-shaped as a whole. The flat plate portions 73a and 73b are parallel to each other. Moreover, the connection part 73c is arrange | positioned between both flat plate part 73a, 73b, and has connected the center part of both flat plate part 73a, 73b. Each pillar 73 is disposed in a posture in which one flat plate portion 73 a faces the outside of the side wall 71 and the other flat plate portion 73 b is joined to the outer surface of the side wall 71. Further, a pair of stays 74 arranged vertically are fixed to the lower portion of the other flat plate portion 73b. Each pillar 73 is fixed to the outer wall portion of the side wall 71 with the anchor bolt 74a through the stay 74, so that the lower portion of the pillar 73 is joined to the outer surface of the side wall 71 and the upper portion is the side wall as described above. It is fixed so as to protrude above 71.

  A soundproof panel 75 for soundproofing is interposed between the upper portions of the pillars 73. The soundproof panel 75 is connected to the upper and lower sides of each pillar 73 by, for example, four stages. A lower portion of each pillar 73, that is, a portion facing the side wall 71 in the lateral direction is covered with a cover (not shown).

  A wire 76 is stretched on the outer surface of each pillar 73 via the mounting bracket 10. In the illustrated example, a first wire 76 that connects the lower portions of the plurality of pillars 73 and a second wire 76 that connects the upper portions are illustrated.

  As shown in FIG. 8, each wire 76 has a terminal fitting 77 attached to the end thereof. The terminal fitting 77 is attached to a stay 78 fixed to the side wall 71. In the illustrated example, the terminal fitting 77 can apply tension to the wire 76 after being attached to the stay 78 by a well-known bolt-nut mechanism.

  In constructing the soundproof wall 80, first, a plurality of pillars 73 are erected on the side wall 71 of the bridge girder 72 at intervals. In this step, a scaffold is installed on the bridge girder 72, the pillars 73 are positioned from the outside of the side walls 71, anchor holes are drilled in the side walls 71, and then the pillars 73 are fixed with the anchor bolts 74a.

  Next, a soundproof panel 75 is interposed between the pillars 73. In this step, a plurality of soundproof panels 75 are interposed in order from the bottom above the adjacent pillars 73, 73. The soundproof panel 75 fits in a space surrounded by one pillar 73 and the other pillar 73 (see FIG. 9).

  Next, the insertion hole W <b> 1 is formed in one flat plate portion 73 a of the pillar 73. In this process, one flat plate portion 73a is drilled with a drill or the like from a scaffold provided outside the side wall 71. This process may be performed in the factory in advance.

  Next, the mounting bracket 10 is inserted into the insertion hole W1. In this step, the screw portion 40 of the mounting bracket 10 assembled in the state of FIG. 1 is inserted into the insertion hole W1, and the eyebolt 1 of the mounting bracket 10 is joined to the outer surface of the flat plate portion 73a. Next, the bolt 12 of the mounting bracket 10 is operated by the above-described procedure, and the mounting bracket 10 is fixed to the pillar 73 by tightening with a nut.

  Finally, the wire 76 is laid. In this step, after the terminal metal fitting 77 on one end side of the wire 76 is attached to a preset stay 78, the other terminal metal fitting 77 is inserted into the attachment metal fitting 10 in order from the upstream side in the wiring direction of the wire 76. Connect to the set stay 78. After the connection, each terminal fitting 77 is operated to apply a required tension to the wire 76, thereby completing the routing operation.

  As described above, the present embodiment relates to the mounting bracket 10 that is fixed to the main mounting portion (for example, the flat plate portion 73a) of the building.

  The mounting bracket 10 includes an expanded body 21. The expansion body 21 is formed in a cylindrical shape that can be inserted into the insertion hole W1 formed in the main part of the attachment. Moreover, the expansion body 21 is divided | segmented into the some locking piece 21a in the circumferential direction.

  The mounting bracket 10 includes a bolt 12. The bolt 12 includes a screw part 40 and a head part 41. The head 41 is disposed outside the main mounting part. Further, the bolt 12 is inserted through the expanded body 21.

  Further, the mounting bracket 10 includes a bracket main body 11 disposed on the surface of the main mounting portion such as the pillar 73. The metal fitting body 11 includes an engagement portion 14. The engaging portion 14 is connected to the one end portion of the bolt 12 so as to be rotatable relative to the bolt 12 so that the bolt 12 can be operated from the outside of the attachment main portion. In the illustrated embodiment, the eyebolt 1 is constituted by the metal fitting body 11 and the bolt 12. The bolt 12 of the eyebolt 1 rotates relative to the metal fitting body 11.

  In addition, the mounting bracket 10 includes a nut 3. The nut 3 is screwed into the screw portion 40 from the other end side of the bolt 12. As the nut 3 moves from the other end portion side of the screw portion 40 to the one end portion side of the screw portion 40, the nut 3 expands with the wall W (or the flat plate portion 73 a of the pillar 73) as a main part of attachment between the nut 3. By sandwiching the open body 21, the plurality of locking pieces 21 a are pushed and widened to expand the expanded body 21.

  In the mounting bracket 10 described above, the operation is performed so that the bolt 12 of the eyebolt 1 is inserted into the insertion hole W1 from one surface of the building (for example, the outer surface of the flat plate portion 73a of the pillar 73) and the bolt 12 is rotated in a specific direction. By tightening the nut 3 to the engaging portion 14 side, the locking piece 21a can be expanded and the mounting bracket 10 can be fixed. Therefore, there is no need to directly drill the insertion hole W1 of the wire 76 in the building, and workability is greatly improved. In addition, since it is not necessary to directly drill the insertion hole W1 of the wire 76 in the building, the restriction on the portion where the mounting bracket 10 is mounted is reduced. Therefore, the wire 76 can be stretched at a desired place, and the reinforcing effect can be enhanced. Further, since the metal fitting body 11 is externally attached to the building, even if the terminal metal fitting is fixed to the end portion of the wire 76, the holding specification of the wire 76 of the metal fitting body 11 can be arbitrarily selected. Can be dealt with. Therefore, it is not necessary to make a large hole in the pillar 73, and the strength of the building is not reduced. In addition, since the construction can be completed only by mounting from one surface of the pillar 73, the other side of the pillar 73 (the bridge girder 72) even when the mounting bracket 10 is attached to the existing pillar 73. Operation from the side) is no longer necessary, and the installation work becomes much easier.

  In the present embodiment, the expanding body 21 is extended to the metal fitting body 11. Specifically, the expansion body 21 protrudes from the metal fitting body 11 in a cantilever manner. For this reason, in this embodiment, the expansion body 21 is integrated from the metal fitting main body 11, and the operation | work which mounts the expansion body 21 to an attachment main part becomes easy. Moreover, it becomes easy to unitize the metal fitting body 11, the bolt 12, the expanded body 21, and the nut 3, and the handling becomes easier.

  In addition, since the bolt 12 is connected to the metal fitting body 11 so as to be relatively rotatable, it is not necessary to directly drive the metal fitting body 11 when operating the bolt 12. Therefore, the mounting position of the metal fitting body 11 does not shift after the bolt 12 is tightened, and the posture of the metal fitting body 11 can be easily set uniformly. Therefore, attachment of articles such as the first and second wires 76 is facilitated.

  Moreover, in this embodiment, the expansion body 21 is divided by the slit S into the some locking piece 21a. The plurality of locking pieces 21a are arranged in the circumferential direction. The plurality of locking pieces 21a are deformed radially outward by the slits S, and the expanding body 21 is expanded. On the other hand, the outer peripheral surface of the nut 3 has a ridge line 31 as a rotation blocking portion that fits with at least some of the slits S of the plurality of slits S. The ridge line 31 prevents the relative rotation of the nut 3 with respect to the expanded body 21. For this reason, in this embodiment, the locking piece 21a of the expansion body 21 can be expanded while the rotation of the nut 3 is stopped at the time of tightening with an easily manufactured structure.

  Further, the outer peripheral surface of the nut 3 has a taper that extends in the direction away from the metal fitting body 11. Thereby, the nut 3 also functions as a wedge member for expanding the expanding body 21.

  In particular, the cross-sectional shape of the nut 3 is formed in a polygon having the same number of vertices as the number of slits S. For this reason, in this embodiment, each locking piece 21a can be expanded equally from the nut 3, and the expansion body 21 can be expanded into a stable shape, and a firm determinating force can be obtained. Therefore, the locking piece 21a can be expanded with a shape that is easy to manufacture.

  In a preferred embodiment of the mounting bracket, the nut 3 has a polygonal frustum shape (or wedge shape) in which the cross section of the nut 3 increases as the distance from the bracket body 11 increases. For this reason, in the present embodiment, coupled with the fact that the outer peripheral surface of the nut 3 has a polygonal cross section having the same number of vertices as the slits S, the nut 3 can be more securely prevented from rotating with a shape that is easier to manufacture. The locking piece 21a of the expanding body 21 can be expanded while being shown.

  Moreover, in this embodiment, the some locking piece 21a is formed with the material (for example, steel materials) which plastically deforms at the time of expansion. For this reason, in this embodiment, once fixed, the mounting bracket 10 cannot be removed after construction, and an antitheft function can be achieved.

  Another aspect of the present embodiment is an elevated soundproof wall 80. The soundproof wall 80 includes a side wall 71. The side wall 71 is provided on the side edge of the bridge girder 72 along the longitudinal direction of the bridge girder 72.

  The soundproof wall 80 includes a plurality of pillars 73. Each pillar 73 is erected on the side wall 71 at an interval in the longitudinal direction of the bridge girder 72.

  The soundproof wall 80 includes a plurality of soundproof panels 75. Each soundproof panel 75 is attached between the plurality of pillars 73.

  The soundproof wall 80 includes a plurality of mounting brackets 10 fixed at appropriate positions of the pillar 73. As each mounting bracket 10, the one according to the above embodiment is suitably employed.

  The soundproof wall 80 includes at least one wire 76. The wire 76 connects the plurality of pillars 73 via the mounting bracket 10.

  In the present embodiment, since the plurality of pillars 73 are connected by the wires 76, the possibility that the pillars 73 themselves and the soundproof panels 75 arranged between the pillars 73 are scattered and fall is reduced. In addition, the plurality of mounting brackets 10 provided on the pillar 73 is operated by operating the bolts 12 from the bracket body 11 side to tighten the nut 3 to the bracket body 11 side, thereby expanding the locking piece 21a with the nut 3. The mounting bracket 10 can be fixed. Therefore, even when the mounting location of the mounting bracket 10 is a main part of an existing building, an operation from the back side of the building is not required, and the mounting operation is greatly facilitated.

  In the present embodiment, at least one wire 76 includes a wire (first wire) supported by the mounting bracket 10 fixed in the vicinity of the side wall 71 of the pillar 73. Also, at least one wire 76 is supported by the mounting bracket 10 fixed to the pillar 73 above the mounting bracket 10 that supports the wire 76 (first wire) (second wire). including. For this reason, in this embodiment, since the two upper and lower portions of the pillar 73 are connected by the first and second wires 76, the pillars 73 are more firmly reinforced.

  Yet another aspect of the present embodiment is a method for constructing the soundproof wall 80.

  The construction method includes a step of standing a plurality of pillars 73 at intervals in the holding portion of the bridge girder 72.

  The construction method includes a step of interposing a soundproof panel 75 between the pillars 73.

  The construction method also includes a step of inserting the mounting bracket 10 into the communication hole 23W1. In this step, a step of forming the communication hole 23 in the flat plate portion 73a of each pillar 73 may be provided. Moreover, you may provide the process of inserting the expansion body 21 of the attachment metal fitting 10 into the communicating hole 23 from the surface side of the flat plate part 73a. Furthermore, you may provide the fixing process which fixes the metal fitting main body 11 on the surface of the flat plate part 73a. In this fixing step, by rotating the head 41 of the bolt 12 from the surface of the bracket body 11 of the mounting bracket 10, the nut of the mounting bracket 10 is advanced in a direction approaching the bracket body 11 to expand the expanding body 21. To do.

  Further, the construction method includes a step of fastening the nut 3 with the bolt 12 of the mounting bracket 10 and fixing the mounting bracket 10 to the pillar 73.

  The construction method also includes a step of inserting the wire 76 through the metal fitting body 11 of the attachment metal fitting 10.

  For this reason, in the present embodiment, the installation can be completed by attaching the mounting bracket 10 from one surface (for example, the outside of the bridge girder 72) of the elevated soundproof wall and inserting the wire 76 therethrough. In other words, when the wire 76 is stretched on one surface of the elevated soundproof wall, there is no need to process from the other surface. Therefore, workability is greatly improved.

  The present invention is not limited to the embodiment described above, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

  For example, as described above, the nut 3 is preferably formed in a wedge shape in which one end side is narrowed. However, the present invention is not limited to this example, and the expanded body may be expanded by interposing a wedge-shaped member between the nut and the expanded body.

  Further, it is not always necessary that the nut 3 has a tapered shape.

  Furthermore, the number of nuts 3 may be smaller than the slit S. That is, as long as interference is avoided, the number of slits S and the number of ridge lines 31 of the nut 3 may not be the same.

  Furthermore, a structure in which the metal fitting body 11 and the expanded body 21 are integrally formed may be employed.

  Furthermore, at the time of construction, after the wire 76 is inserted into the mounting bracket 10 in advance, the mounting bracket 10 may be installed on the main part of the mounting.

DESCRIPTION OF SYMBOLS 1 Eyebolt 3 Nut 10 Mounting bracket 11 Bracket main body 12 Bolt 14 Engagement part 21 Expanding body 21a Locking piece 31 Ridge line 40 Screw part 41 Head 70 Viaduct 71 Side wall (an example of a holding part)
73 Pillar 73a Flat plate part (an example of a mounting main part)
75 Soundproof panel 76 Wire 80 Soundproof wall W Wall
W1 insertion hole

Claims (1)

A side wall provided on a side edge of the bridge girder along the longitudinal direction of the bridge girder, a plurality of pillars standing on the side wall at intervals in the longitudinal direction of the bridge girder, and attached between the plurality of pillars For constructing an elevated soundproof wall comprising a soundproof panel, a plurality of mounting brackets fixed to the pillars, and at least one wire connecting the plurality of pillars via the plurality of mounting brackets A method for constructing an elevated soundproof wall,
The lower part of each of the plurality of pillars is joined to the outer surface of the side wall, and the upper part of the pillar is fixed so as to protrude upward from the side wall. A step of standing a plurality of pillars in
Inserting a soundproof panel between pillars adjacent to each other among the plurality of pillars;
Attaching the wires for connecting the pillars to each other and suppressing the relative displacement between the pillars by using the plurality of mounting brackets,
The step of attaching the wire includes
Forming an insertion hole in the lower part of each pillar;
Each of the plurality of mounting brackets has an engaging portion that can be engaged with the pillar, and is connected to the bracket main body and disposed on the lower surface of the pillar, and the insertion hole An expanded body having a shape that can be inserted into the inside from the outside of the side wall and that can be expanded outward in the radial direction by receiving pressure from the inside. And a bolt that is inserted along the axial direction of the expanding body and that is rotatably supported by the metal fitting body, and a nut that is screwed to the bolt. The bolt receives a rotation operation. A head portion, and a screw portion that can be screwed to the nut, the head portion exposed on the surface of the metal fitting body, and at least a portion of the screw portion positioned on the inner side of the expanding body. Held by the metal fitting body, and the nut is In the state where relative rotation with respect to the expansion body is restricted, the expansion body is disposed inside the expansion body, and is displaced in a direction approaching the metal fitting body as the bolt rotates in a specific direction. Preparing a mounting bracket to be screwed with the bolt so as to expand the expanded body by pressing from the step, and inserting the expanded body of the mounting bracket into the insertion hole from the outside of the side wall;
By rotating the head of the bolt from the surface of the bracket main body of the mounting bracket, the nut of the mounting bracket is advanced in a direction approaching the bracket main body, thereby expanding the expanding body, and thereby the bracket main body. Fixing on the lower surface of the pillar;
A method for constructing an elevated soundproof wall, comprising the step of inserting the wire into a metal fitting body of each of the attachment metal fittings.

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