JP2011017357A - Universal hanging angle joint fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint fitting installed and used between a hanging bolt and a hanging support nut of a slab or the like, and freely achieving vertical and oblique hanging of the hanging bolt.SOLUTION: This fitting includes a fitting body formed in a box shape with an integrated side surface opening by pressing a belt shape metal plate, having a top wall bent, and including a long hole in a crossing direction thereof, a fixing nut 2 fixed on a bottom wall thereof, and a support bolt 3 supporting the fitting body by making a rotary support part abut on an edge part of the long hole. The support bolt 3 is screwed in the hanging support nut 8, and the hanging bolt 4 is screwed in the fixing nut 2. Since the fitting body can be rotated with respect to the support bolt 3 and relative position of the fitting body and the support bolt 3 is variable in a range of the long hole, hanging angle of the support bolt 3 can be freely changed in 360 degrees.

Description

  The present invention supports both vertical and diagonal suspension so that a ceiling, piping pipe, equipment, rack, etc. can be suspended and supported on a concrete slab or suspension bracket by suspension bolts, and can be suitably used for supporting the anti-rest. The present invention relates to a joint metal fitting that can be freely hung.

  For example, as shown in Japanese Patent Application Laid-Open No. H10-228707, a piping pipe has a suspension bolt screwed into an insert nut embedded in a concrete slab, a piping band is disposed at the lower end of the suspension bolt via a tangle, and the piping band. In order to support the vertical suspension of the piping pipe, and to support the suspension of the piping pipe, as shown in Patent Document 2, for example, a bracket for supporting the suspension is disposed on the suspension band supported by the suspension bolt. However, Patent Document 3 discloses a suspension bracket that enables suspension support by vertical suspension of a suspension bolt and anti-vibration support by oblique suspension while a support rod such as a wire is disposed between the bracket and the concrete slab. The upper member and the lower member each having a U-shaped cross section are overlapped with each other to form a bracket body that is pivotally supported by rivets, and through the through hole in the top wall of the upper member. While tapping screws are screwed into the concrete slab, the metal fitting body is fixedly supported on the concrete slab, while being held and fixed to the bottom wall of the lower member by upper and side cut and raised pieces formed on the lower member. There is known one in which a suspension bolt is screwed onto a nut.

  In Patent Document 3, the upper and lower members of the metal fitting body are pivotally supported by rivets, so that the lower member is pivoted back and forth in a state where the metal slab is fixed to the metal fitting body by tapping screws, and is suspended by being screwed onto a nut. It is assumed that the vertical suspension and the slanting suspension angle in which the bolt is oriented in one longitudinal direction are free. In this case, the bracket body is formed by pivotally supporting upper and lower members. Since the support is made with rivets and the metal fittings are fixed to the concrete slab with tapping screws, the objects to be hung are limited to relatively light weights and cannot be used universally for various objects. This kind of construction is based on the premise that a nut is fixed to a concrete slab, a suspension fitting having a nut is fixed to a steel material, and a suspension bolt is screwed onto these suspension support nuts. For general construction to support the target object, it is not possible to ensure the flexibility of the angle even if it is interposed between them, and the upper bracket is crimped to the concrete slab by screwing the tapping screw into the concrete slab. As a result, the metal fitting body cannot be rotated after the fixing, and therefore, when fixing the metal fitting body, it is necessary to screw in the tapping screw with the direction of the lower metal fitting matched to the suspension support direction when the metal fitting body is fixed obliquely. However, there are still problems such as that the usability is not always good.

  For this reason, the present inventor has disclosed, according to Patent Document 4, a ceiling wall that is curved or protrudes upward and that has a long hole penetrating in the longitudinal direction along the curved surface or projection surface, and covers both the front and rear sides of the ceiling wall. A side-opening box-shaped metal fitting body having a pair of side walls arranged opposite to each other and a bottom wall arranged so as to close between the pair of side walls, and a bolt head arranged on the lower surface of the ceiling wall, the ceiling wall A support bolt arranged so that the longitudinal direction of the bolt can be freely swung by inserting the bolt shaft into the long hole, and a fixing nut joined and fixed to the bottom wall of the metal fitting body. A joint fitting has been proposed in which the above-described support bolt is screwed onto a suspension support nut such as a screw, and the suspension bolt is screwed onto a fixed nut so that the angle of the suspension bolt can be freely adjusted. A specific form of the main body is, for example, that the top wall, the pair of side walls, and the bottom wall are bent by press forming a single band metal plate, while the longitudinal ends of the band metal plate are formed at the ends. It overlaps between a pair of side walls, and the tip of one bent piece located on the lower side is joined to the other bent piece, while the fixing nut is directed downward from the lower surface of the bottom wall of the metal fitting body. It is located so as to protrude and is joined to the bottom wall by caulking of a flange of a flanged nut.

JP 2007-192345 A JP 2004-150452 A JP 2005-180607 A Japanese Patent Application No. 2008-138407

  The joint fitting according to the proposal of the inventor of Patent Document 4 is a general-purpose joint using a suspension bolt regardless of the load by being interposed between a suspension support nut such as an insert nut and a suspension bracket nut and a suspension bolt. The suspension support of the suspension bolt is not limited to the vertical suspension, and the suspension angle for performing the oblique suspension toward a free angle of 360 ° is made highly flexible. Thus, it is possible to ensure versatility and good usability for an object to be suspended.

  However, in this case, the bottom wall of the metal fitting body overlaps both ends in the longitudinal direction of the belt-shaped metal plate between a pair of side walls, and one bent piece end located on the lower side thereof is used as the other bent piece. Since the length of the one bent piece overlaps the bottom wall, the amount of the band-shaped metal plate increases, and the tip of one bent piece located on the lower side is By joining to the other bent piece, the joint location on the bottom wall becomes a position displaced to the front and rear side of the metal fitting body. Since the force in the peeling direction of the joint acts, there is a possibility that the joint will break when supporting heavy objects, and if an error occurs in the strip metal plate and its press molding, it will appear in the bent piece of the bottom wall, The balance of the main body is lost and the suspension is supported. When the suspension bolt is screwed onto the nut, the bracket body may not be in the vertical position and may give an impression of a defective product, and the fixing nut is joined so as to protrude downward from the bottom surface of the bottom wall. In order to prevent the support bolt from falling off from the metal fitting body, the bolt shaft of the support bolt is made long so that the bolt head is received by the fixing nut in a state of being engaged with the elongated hole, for example, The length of the support bolt is also increased, for example, by placing a retaining protrusion protruding into the bracket body on the pair of side walls of the bracket body, for example, by cutting and raising the sidewall to receive the bolt head. Or additional press work, which increases the cost. Accordingly, it is necessary to further improve these matters in the joint fitting of the above-described form.

  The present invention has been made in view of the circumstances concerned, and the problem to be solved is to improve the configuration of the bottom wall of the metal fitting body without affecting the usability of the metal fitting body, and to form a strip metal plate. To reduce the amount of the strip-shaped metal plate used as much as possible, eliminate the cause of cost increase, and the possibility of breakage of the joint when supporting the heavy load due to the displacement of the suspension bolt position and the joint To provide a joint bracket that can always provide a stable suspension support and can secure a good balance even when a suspension bolt is screwed onto a suspension support nut. It is an object of the present invention to provide a joint fitting that can prevent the support bolt from dropping even if the bolt shaft of the bolt is made as short as possible.

  In accordance with the above-mentioned problems, the present invention provides a base plate, a top wall, and a side wall in such a manner that the joining position of the band metal plate is the center position in the front-rear direction of the metal fitting body, In the same way as above, it is formed of a single-layered strip-like metal plate, eliminating the displacement of the suspension bolt's suspension support position and the bottom plate's joint location, and supporting the load support by the bracket body, including heavy objects, more stably and reliably. In order to eliminate the possibility of breakage at the joint portion of the bottom plate and to eliminate the loss of balance due to the screwing to the suspension support nut, the screwing is satisfactorily accommodated. The invention according to Item 1, wherein the ceiling wall is curved or protrudes upward and has a long hole penetrating in the front-rear direction along the curved surface or projection surface, and is opposed to cover both front and rear sides of the ceiling wall. A pair of disposed side walls and the pair of side walls A side-opening box-shaped metal fitting body having a bottom wall arranged so as to block the bolt, and a bolt head on the lower surface of the top wall, and inserting a bolt shaft into the long hole in the top wall. A support bolt arranged so as to be freely swingable in the longitudinal direction, and a fixing nut joined and fixed to the bottom wall of the metal fitting body. The support bolt is attached to a suspension nut such as an insert nut and a nut of the metal fitting. A joint fitting that allows the angle of the suspension bolt to be freely set by screwing the suspension bolt to each other, wherein the top wall, the pair of side walls, and the bottom wall of the side-opening box-shaped bracket body are formed in a single band shape. A metal fitting that can be bent freely by press forming the metal plate, and has both longitudinal ends of the belt-like metal plate butt-joined at the center position of the bottom wall. One in which the.

  In addition to the above, the invention according to claim 2 is for fixing and fixing the fixing nut to the metal fitting main body with respect to the bottom wall of the metal fitting main body, and the upper end of the fixing nut on the bottom wall inside the metal fitting main body. The length of the bolt shaft of the support bolt is approximated to the remaining distance from the top wall or more than this by partially absorbing the distance between the top wall and the bottom wall of the bracket body. In order to prevent the support bolt from falling off, even if the length is increased, the fixing nut is joined and fixed to the bottom wall so as to be positioned inside the side-opening box-shaped metal fitting body. The joint bracket according to claim 1, characterized in that it can be freely suspended.

  In addition to the above, the invention described in claim 3 performs butt joining at both ends in the longitudinal direction of the belt-shaped metal plate by welding, while the fixing nut is a flanged nut, and the fixing is performed at the bottom of the fixing nut. By performing crimping in a wall-mounted state, the butt joints at both ends in the longitudinal direction of the strip metal plate are welded so that the strength of the metal fitting body and the fixing nut is as high as possible. The joint metal fitting according to claim 1 or 2, wherein the fixing nut is joined and fixed by welding or caulking of a flange of a nut with a flange.

  The present invention is a means for solving the above-mentioned problems as the gist of the invention.

  Since the present invention is configured as described above, the invention according to claim 1 uses the joining position of the belt-like metal plate as the center position in the front-rear direction of the metal fitting body, and the hanging support position of the suspension bolt and the joining position of the bottom plate coincide with each other. In this way, the bottom plate is formed of a single-layer belt-like metal plate in the same manner as the top wall and the side wall, and the displacement of the suspension support position of the suspension bolt and the joining position of the bottom plate is eliminated. Load support by the metal fitting body is performed more stably and reliably to eliminate the possibility of breakage at the joining point of the bottom plate and to eliminate the loss of balance caused by the screwing to the suspension support nut, so that the screwing can be stored well. It is possible to provide a joint metal fitting that can be freely suspended.

  In addition to the above, the invention according to claim 2 is for fixing and fixing the fixing nut to the metal fitting main body with respect to the bottom wall of the metal fitting main body, and the upper end of the fixing nut on the bottom wall inside the metal fitting main body. The length of the bolt shaft of the support bolt is approximated to the remaining distance from the top wall or more than this by partially absorbing the distance between the top wall and the bottom wall of the bracket body. Even if the length is increased, the supporting bolt can be prevented from falling off.

  In addition to the above, the invention described in claim 3 performs butt joining at both ends in the longitudinal direction of the belt-shaped metal plate by welding, while the fixing nut is a flanged nut, and the fixing is performed at the bottom of the fixing nut. By performing caulking in the wall-mounted state, the strength of the metal fitting body and the fixing nut can be ensured as high as possible.

It is a perspective view of a joint metal fitting. It is a front view of a joint metal fitting. It is a side view of a joint metal fitting. It is a top view of a metal fitting body. It is a front view of a support bolt. It is a longitudinal cross-sectional view which shows the use condition of a joint metal fitting. It is a longitudinal cross-sectional view which shows the other use condition of a joint metal fitting. It is a longitudinal cross-sectional view which similarly shows the other use condition of a joint metal fitting. It is a longitudinal cross-sectional view which similarly shows the other use condition of a joint metal fitting.

  The present invention will be further described below with reference to the example of the drawings. A is an angleable joint metal fitting made of steel in this example, and the joint metal fitting A is composed of a metal fitting body 1, a support bolt 3, and a fixed fitting. For example, the support bolt 3 is attached to a suspension support nut 8 such as an insert nut installed on a concrete slab or a nut of a suspension fitting, and the suspension bolt 3 is attached to the fixed nut 2. By screwing, the metal fitting body 1 can be rotated 360 degrees with respect to the suspension support nut, and the suspension bolt can be vertically and obliquely suspended.

  The metal fitting body 1 is arranged to face each other so as to cover the front and rear sides of the ceiling wall 11 that is curved or protrudes upward and has a long hole that is provided in the longitudinal direction along the curved or protruding surface. The support bolt 3 has a bolt head 3 disposed on the lower surface of the top wall 11 of the metal fitting body. The support bolt 3 has a pair of side walls and a bottom wall 14 disposed so as to close the pair of side walls. The bolt shaft 32 is inserted into the long hole 12 of the top wall 11 so as to be freely swingable in the longitudinal direction of the long hole 12, and the fixing nut 2 is a bottom wall of the metal fitting body 1. 14, the side-opening box-shaped metal fitting body 1 is formed by pressing the top wall 11, the pair of side walls 13 and the bottom wall 14 into a single band-shaped metal plate. While the band is formed by It is assumed that both longitudinal ends of the metal plate are butt-joined at the center position of the bottom wall 14. In this example, the butt joining of both ends of the strip-shaped metal plate in the metal fitting body 1 is welded. And the fixing and fixing of the fixing nut 2 are performed by welding or caulking of the flanged nut, in this example, by caulking.

  In this example, the metal fitting body 1 is formed by using the metal strip of a thick steel plate so as to ensure the strength as the metal fitting body 1, and is subjected to the above press forming, and is bent in an inverted U-shaped cross section at the top. The top wall 11, the front and rear standing walls 13 hanging down from both ends of the top wall 11, and the lower ends of the standing walls 13 are bent horizontally toward the opposite sides, respectively. In this case, the top wall 11 is provided with a bottom wall 14 having butt ends joined to each other in the longitudinal direction. At this time, the top wall 11 is along the longitudinal direction of the top of the inverted U-shaped curved surface in the arc crossing direction. For example, a long hole 12 having a total length in the top longitudinal direction or substantially the entire length is formed so as to pass through the bolt shaft 34 of the support bolt 3 in the long hole 12, and in this example, the diameter described later is disposed on the bolt shaft 34. The support bolt 3 can be freely swung by inserting the large step portion 33 upward. Further, the bottom wall 14 passes through the bottom wall 14 and the butt joints of the band-shaped metal plate remain on both sides, and a planar circular through hole is formed in the center of the surface thereof. A fixing nut is inserted into the through hole and the flanged nut is inserted, and the flange is caulked against the edge of the through hole to fix the caulking, thereby fixing the fixing nut 2 to the side opening box. It is assumed that it is fixedly bonded to the bottom wall 14 so as to be located inside the metal fitting body.

  The strip-shaped metal plate of this example is, for example, a long plate having a thickness of about 1.5 to 2 mm, a width of about 2.5 to 3 cm, and a length of about 10 to 15 cm. The metal fitting body 1 is formed by processing, and at this time, the radius of the ceiling wall 11 curved in the inverted U-shaped cross section of the metal fitting body 1 is about 1.5 to 2 cm. Is about 2 to 3 cm, and the width of the bottom wall 14, that is, the width between the standing walls 13 is about 2 to 3 cm.

  In this example, the support bolt 3 includes a bolt head 31 and a bolt shaft 34, the length of which is, for example, about 2 to 3 cm, and the shaft diameter of the bolt shaft 34 is an insert nut, a nut of the hanging bracket 7, or the like. On the other hand, the rotation support portion 32 is disposed on the back surface of the head of the support bolt 3 so that the radius of curvature is the same as that of the top of the top wall 11. By using the same diameter, the rotational support portion 32 of the support bolt 3 is in point contact with the edge of the long hole 12 of the top wall 11 so that the frictional resistance is reduced as much as possible. The rotation support portion 32 bulges in an arc shape by building up on the back surface of the bolt head 31 from the outer peripheral end thereof, for example, upward so as to form a hemispherical section, and downward as a single support bolt 3. It has a curved surface. Further, a screw receiving groove (not shown) is arranged on the surface of the bolt head 31 of the support bolt 3, a screwdriver is inserted through the female screw of the fixing nut 2, and the support bolt 3 is attached by operating the screwdriver. The suspension support nut 8 can be screwed, and at this time, the receiving groove is a cross hole or a slot (minus hole) according to a conventional method.

  At this time, the support bolt 3 of this example has a large-diameter stepped portion 33, for example, a rectangular or trapezoidal cross section between the root of the bolt head 31 and the bolt shaft 34, and in this example, a trapezoidal shape and forms a planar circle. By arranging the large diameter step portion 33 and setting the width of the long hole 12 of the metal fitting body 1 slightly wider than the outer diameter of the large diameter step portion 33, the support bolt 3 is screwed onto the suspension support nut 8. When mounted, the thickness of the top wall 11 of the metal fitting body 1 is set within the height range of the large-diameter step portion 33, thereby including, for example, the case where the concrete slab 5 has irregularities and inclinations. Even if the support bolt 3 is screwed so as to be firmly fastened to the suspension support nut 8 installed on the concrete slab 5 or the suspension fitting 7, a gap is formed between the top wall 11 and the ceiling bolt 11. , So that the swinging rotation of the bracket body 1 is not hindered. A. In this example, the large diameter step portion 33 has a height higher than the thickness of the top wall 11 of the metal fitting body 1, which is higher than 1.5 mm in this example, for example, 0.5 to 1 cm with a margin. It is as a degree.

  In this example, the bolt head 31 of the support bolt 3 has a diameter larger than the diameter of the female screw of the fixing nut 2 and the length of the support bolt 3 is the top of the metal fitting body 1 in the arc crossing direction and the fixing nut. The support bolt 3 is positioned at the inside of the metal fitting body 1 by being bonded and fixed to the top portion of the top wall 11 and the bottom wall 14 in the metal fitting body 1. The bolt shaft 34 protrudes 1 to 1.5 cm upward from the long hole 12 of the metal fitting body 1 with respect to a distance of about 2 cm between the upper ends of the fixing nuts 2 having a height of 8 to 9 mm. With the lower end of the bracket mounted on the fixing nut 2, even if the metal fitting body 1 is rotated to an arbitrary angle, the support bolt 3 is not detached from the metal fitting body 1 so that it can be dropped or lost. Solved the problem There is as of.

  The support bolt 3 is fixed to the metal fitting body 1 after the bolt shaft 34 protrudes from the long hole 12 so that the bolt head 31 of the support bolt 3 is located inside the metal fitting body 1. It is assumed that the attachment is performed.

  In the joint metal fitting A formed as described above, the metal fitting body 1 can be rotated in the horizontal direction with respect to the support bolt 3 and the metal fitting body 1 can be inclined in the range of the long hole 12. On the other hand, it is possible to perform the non-directional suspension support as a free suspension angle of 360 degrees including the vertical suspension and the oblique suspension of the suspension bolt 4. If this is explained in relation to the object support of the suspension object, FIG. 6 shows a pipe insert as an object to be suspended and a series of insert nuts embedded in the concrete slab 5 at predetermined intervals and arranged in a straight line for suspension support. As the nut 8, the joint bolt A is installed by screwing the support bolt 3 onto the suspension support nut 8, and the suspension band that supports and holds the piping band 9 that supports the piping pipe positioned below the insert nut. The bolt 4 is suspended vertically, and the suspension bolt 4 that supports and supports the piping band 9 that supports the piping pipe that is eccentric from the piping pipe in the longitudinal direction of the piping is suspended obliquely, This is an example of supporting a piping pipe.

  FIGS. 7 and 8 similarly show a pipe 7 (not shown) as an object to be suspended, with respect to a steel material 6 arranged horizontally in FIG. 7 and a hanging metal fitting 7 fixed to a steel material 6 inclined in FIG. The nut arranged at the lower end is used as a suspension support nut 8, and the joint bracket A is installed by screwing the support bolt 3 onto the suspension support nut 8. This is an example of hanging.

  FIG. 9 shows the equipment or its rack, in this example, the rack as an object to be supported, and is supported by hanging the rack by screwing directly on insert nuts arranged at four locations on the concrete slab 5 according to a conventional method. An insert nut in which the suspended bolt 4 is embedded in a position spaced apart from the insert nut of the concrete slab 5 is used as a suspension support nut 8, and the support bolt 3 is screwed to the suspension support nut 8 to joint. The bracket A is installed, the suspension bolt 4 is similarly slanted, and the tip of the suspension bolt 4 is fixed to the S-shaped bracket fixed at the intermediate position in the longitudinal direction of the rack support suspension bolt 4 to support the anti-shock of the rack. This is an example of performing.

  The joint metal fitting A of this example uses the joining position of the belt-like metal plate as the center position in the front-rear direction of the metal fitting body 1 so that the suspension support position of the suspension bolt 4 and the joining position of the bottom wall 14 coincide with each other. In the same manner as the top wall 11 and the side wall 13, it is formed of a single-layered belt-like metal plate, and the positional shift between the suspension support position of the suspension bolt 4 and the joint portion of the bottom wall 14 is eliminated. The load support by the metal fitting body 1 is performed more stably and surely to eliminate the possibility of breakage at the joint portion of the bottom wall 14 and to eliminate the loss of balance due to the screwing to the suspension support nut 8. The fixing nut 2 can be joined and fixed to the metal fitting body 1 with respect to the bottom wall 14 of the metal fitting body 1, and the upper end of the fixing nut 2 is placed inside the metal fitting body 1. Row to be located on bottom wall 14 By partially absorbing the distance between the top wall 11 and the bottom wall 14 of the metal fitting body 1, the length of the bolt shaft 34 of the support bolt 3 is approximated to the remaining distance from the top wall 11. Even if the length is made somewhat longer, it is possible to prevent the support bolt 3 from falling off. Further, the joining of the both ends in the longitudinal direction of the belt-like metal plate is performed by welding, while the fixing nut 2 As a nut with a flange, the strength of the metal fitting body 1 and the fixing nut 2 is ensured as high as possible by performing caulking while the bottom wall 14 of the fixing nut 2 is mounted. Can be made easy to use.

  Although the illustrated example is as described above, the shape of the top wall should be an appropriate cross section between the inverted U-shaped section and the inverted V-shaped section in the front-rear direction, and the top wall is a hemispherical surface. As described above, the rotation support part of the support bolt is also formed into a spherical surface, the contact is made to be a surface contact, the screwless shaft part is arranged in place of the large diameter step part, the belt-like metal The butt joint of both ends in the longitudinal direction of the plate is performed by bonding, and the fixing nut is joined and fixed by welding or bonding, etc., including a suspension support nut, a suspension bolt, a joint bracket, a metal fitting body, a ceiling wall, Each specific shape, structure, material, dimensions, relationship between these, such as long holes, support bolts, fixing nuts, etc., addition to these, its use, usage, etc., are in various forms unless they are contrary to the gist of the invention. Can be.

A Joint metal fitting 1 Metal fitting body 11 Top wall 12 Long hole 13 Side wall 14 Bottom wall 15 Welding 2 Fixing nut 3 Support bolt 31 Bolt head 32 Rotation support part 33 Large diameter step part 34 Bolt shaft 4 Suspension bolt 5 Concrete slab 6 Steel material 7 Suspension Bracket 8 Nut for hanging support 9 Piping band

Claims (3)

  A ceiling wall that is curved or protrudes upward and has a long hole penetrating through the curved surface or projection surface in the front-rear direction, a pair of side walls that face each other so as to cover both front and rear sides of the ceiling wall, and the pair A side-opening box-shaped metal fitting body having a bottom wall arranged so as to close between the side walls of the steel plate, and a bolt head disposed on the lower surface of the top wall, and a bolt shaft inserted through a long hole in the top wall. A support bolt disposed in a long hole so as to freely swing in the longitudinal direction, and a fixing nut joined and fixed to the bottom wall of the metal fitting body, the support bolt is attached to a suspension support nut such as an insert nut, a nut of a suspension metal fitting, A joint fitting that allows the angle of the suspension bolt to be freely adjusted by screwing suspension bolts to the fixing nut, wherein the top wall, the pair of side walls, and the bottom wall of the side-opening box-shaped bracket body One band While bent by performing press molding on the genus plate, hanging angle universal joint fitting is characterized by formed by joining butt longitudinal both ends of the belt-shaped metal plate in a central position of the bottom wall.   The joint bracket according to claim 1, wherein the fixing nut is joined and fixed to the bottom wall so as to be positioned inside the side-opening box-shaped bracket body.   The butt joint of both longitudinal ends of the strip-shaped metal plate is performed by welding, and the fixing and fixing of the fixing nut is performed by welding or caulking of the flange of the flanged nut. Joint bracket that can be freely hung.

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