Support metal fitting and method of manufacturing support metal fitting

Abstract

To provide a new support metal fitting capable of easily performing mounting work to a ceiling deck plate and mounting work of an earthquake-resistant frame for supporting lateral running piping, and firmly fastening each member.SOLUTION: A support metal fitting 1 comprises: a plurality of upper plates 20 arranged separately in a longitudinal direction and respectively fixed to lower surfaces of different recessed line parts of a ceiling deck plate; a lower plate 30 extending in the longitudinal direction, arranged below both the upper plates so that an upper surface faces the lower surfaces of both the upper plates, and mounted with at least one of column members; a connecting plate 40 for connecting each upper plate and each lower plate and having a cutout part 41 for avoiding a projecting line part positioned between respective recessed line parts to which each upper plate is fixed; and a working space 50 formed between the lower plate and each upper plate. The working space has a front opening 52 communicating with an external space in at least one of front and rear directions crossing the longitudinal direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a support fitting that is attached to the underside of a ceiling deck plate to suspend and support heavy loads such as piping and an earthquake-resistant stand that supports the piping, and a method for manufacturing the same. [Background technology]

[0002] Conventionally, so-called "horizontal piping" (hereinafter simply referred to as "piping") that runs along the ceiling surface among piping that serves as a flow path for various fluids such as air, water, and gas, is suspended from the ceiling to support its own weight. Hanging bolts, angle irons, etc. are used as a means for supporting the weight of the piping. One end of the hanging bolt, angle iron, etc. is fixed to the ceiling so that the longitudinal direction extends vertically, and the other longitudinal end supports the piping. Patent Document 1 describes a bolt support bracket that enables hanging bolts, which support ceiling-suspended objects such as air conditioners by suspending them from a corrugated ceiling deck plate, to be installed simply and efficiently on the ceiling surface. The corrugated ceiling deck plate has a configuration in which peaks that protrude upward (recess) and extend in a first direction and valleys that protrude downward and extend in the first direction are alternately repeated in a second direction. The bolt support fitting has a bolt retaining portion that extends in the second direction and is attached in contact with the underside of the valley portion, and fixing portions that extend upward from each longitudinal end of the bolt retaining portion and are respectively fixed to the underside of the valley portion of the ceiling deck plate. The bolt retaining portion holds the hanging bolt in a hanging state.

[0003] The pipes, which are heavy objects, are supported by anti-vibration means that suppress lateral vibrations caused by earthquakes in order to prevent damage to equipment due to earthquakes (earthquake-resistant support). The anti-vibration means suppresses the vibration of the pipes in a direction perpendicular to the extension direction of the pipes. As the anti-vibration means, for example, diagonal members (braces) are used. As an example, as described in Patent Document 2, one end (upper side) of the diagonal member is fixed to the ceiling so that its longitudinal direction extends in a direction inclined with respect to the vertical direction, and the other end (lower side) in the longitudinal direction is fixed near the fixing part between the suspension bolt and the pipes. As another example, the diagonal member is inserted in an X-shape between two adjacent suspension bolts as described in FIG. 27 of Patent Document 1, etc. The two inserted diagonal members suppress the positional displacement of the adjacent suspension bolts in the shape of a parallelogram. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Unexamined Japanese Patent Publication No. 2022-107492 [Patent Document 2] Japanese Patent Application Publication No. 6-117576 Summary of the Invention [Problem to be solved by the invention]

[0005] The bolt retaining portion in the bolt support fitting of Patent Document 1 has a recess that receives and engages the lower portion of the valley portion. By engaging the recess with the lower portion of the valley portion, the bolt support fitting suppresses the bolt retaining portion from swinging in the second direction even when an earthquake occurs. However, the bolt support bracket is configured so that the upper end of the suspension bolt is screwed into a long nut protruding from the underside of the bolt holding part. Since the suspension bolt cannot suppress horizontal forces, it is not suitable for suspending heavy pipes while satisfying earthquake resistance standards. In other words, in order to suspend heavy pipes, it is necessary to fix them to a stand that can withstand horizontal forces. The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a new support bracket that can easily be attached to a ceiling deck plate and to an earthquake-resistant frame that supports piping. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a support bracket that is attached to an underside of a ceiling deck plate having a convex streak portion that protrudes downward and extends in a first direction and a concave streak portion that protrudes upward and extends in the first direction, and in which the convex streak portion and the concave streak portion repeat in a second direction intersecting the first direction, so that the longitudinal direction crosses the convex streak portion and the concave streak portion, and that suspends and supports an earthquake-resistant rack, the earthquake-resistant rack comprising a pair of column members that are arranged at a predetermined interval in the second direction, and an object holding portion that is supported by lower ends of both column members and holds an object to be held, the support bracket being arranged at a predetermined interval in the longitudinal direction, and a plurality of upper plates that are fixed to the undersides of different concave streak portions of the ceiling deck plate, and a plurality of upper plates that extend in the longitudinal direction. and a lower plate to which at least one of the pillar members is attached, the lower plate being arranged below the upper plates so that its upper surface faces the lower surfaces of the upper plates, the lower plate connecting the upper plates and the lower plate and having a cutout portion that avoids the convex rib portions located between the concave rib portions to which the upper plates are fixed, and a work space formed between the lower plate and the upper plates, the work space having an opening in at least one of the front-to-rear directions intersecting the longitudinal direction that connects the work space with an external space, and with the support fittings positioned on the ceiling deck plate, the work of attaching the support fittings to the ceiling deck plate and the work of attaching the pillar members to the support fittings can be performed from the external space through the opening. Effect of the Invention

[0007] According to the present invention, a novel support fitting is provided that can easily be attached to a ceiling deck plate and to an earthquake-resistant frame that supports piping. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an example of piping supported by a plurality of earthquake-resistant racks. [Diagram 2] 1A and 1B are diagrams showing the structure of the upper part of the column member that constitutes the earthquake-resistant frame, where (a) is a perspective view and (b) is a bottom view. [Diagram 3] 1A and 1B are front views showing a schematic example of a concrete ceiling to which a support bracket according to one embodiment of the present invention is attached. [Figure 4] FIG. 1 is a perspective view showing a support fitting according to a first embodiment of the present invention. [Diagram 5] FIG. 11 is a perspective view showing a support fitting according to a second embodiment of the present invention. [Figure 6] FIG. 11 is a perspective view showing a support fitting according to a third embodiment of the present invention. [Figure 7] FIG. 11 is a perspective view showing a support fitting according to a fourth embodiment of the present invention. [Figure 8] FIG. 13 is a perspective view showing a support fitting according to a fifth embodiment of the present invention. [Figure 9] FIG. 13 is a perspective view showing a support fitting according to a sixth embodiment of the present invention. [Figure 10] FIG. 13 is a perspective view showing a support bracket according to a seventh embodiment of the present invention. [Figure 11] FIG. 13 is a perspective view showing a support bracket according to an eighth embodiment of the present invention. [Figure 12] 1A to 1D are perspective views illustrating a method for producing a support bracket from a channel steel. [Figure 13] FIG. 6 is a diagram for explaining an analysis of the support fitting shown in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention will be described in detail below with reference to the embodiment shown in the drawings. However, unless otherwise specified, the components, types, combinations, shapes, relative positions, etc. described in the embodiment are merely illustrative examples and do not limit the scope of the present invention. In addition, components common to each embodiment will be given the same reference numerals and descriptions thereof will be omitted as appropriate.

[0010] [Pipe suspension support structure] 1 is a perspective view showing an example of a pipe supported by a plurality of earthquake-resistant racks. In the figure, the vertical direction is the Z direction, the longitudinal direction of the pipe 100 (the direction in which the air flows) is the Y direction, and the direction perpendicular to the Z direction and the Y direction is the X direction (the width direction of the pipe). Pipes 100, 100 that transport fluids such as water for air conditioning or the like are supported by a plurality of earthquake-resistant frames 200, 200 . . . installed at predetermined intervals in the longitudinal direction. Hereinafter, the present invention will be described based on an example of a pipe 100 having a generally circular cross-sectional shape (cross-sectional shape in the ZX plane), but the pipe 100 may have a cross-sectional shape other than a circular shape.

[0011] [Earthquake-resistant stand] An example of an earthquake-resistant frame will be described with reference to Figs. 2(a) and (b) are diagrams showing the structure of the upper part of the column members constituting the seismic frame, (a) being a perspective view and (b) being a bottom view. The earthquake-resistant stand 200 functions as a means for supporting heavy loads such as pipes by suspending them from the ceiling 110, beams, etc. The earthquake-resistant stand 200 functions as a vibration prevention means for suppressing or reducing the vibration of the pipes, etc. (horizontal vibration in the X direction in the figure) during an earthquake, etc. The earthquake-resistant frame 200 comprises a pair of column members 210, 210 whose upper parts are fixed to a ceiling 110 or the like, a horizontal member 220 that connects the column members 210, 210 at their lower ends, and gusset plates 230, 230 that are fixed to both the horizontal member 220 and each of the column members 210, 210.

[0012] <<Column members>> The column member 210 includes a column body 211 and a top plate 212 welded to the upper end surface of the column body 211. The column bodies 211, 211 hang down from the ceiling 110 at a predetermined interval in the X direction so as to be arranged on both sides of the piping 100. The column bodies 211, 211 are made of, for example, channel steel. The type (cross-sectional standard) and longitudinal length of the steel material making up the column body 211 are determined so as to satisfy the required strength depending on the weight of the piping to be supported and the installation height level of the piping.

[0013] The top plate 212 is a means for fixing the column member 210 to the ceiling 110 or the like. At least one hole 213 is formed through the top plate 212 at an appropriate position on the surface. The hole 213 is used to insert the shank of a post-installed anchor or bolt that is driven into the ceiling (slab). One side (one end in the longitudinal direction / X direction) of the illustrated top plate 212 protrudes outward from one side surface (the outer side surface of one flange) of the column body 211. In this example, two holes 213, 213 are formed penetrating the top plate 212, spaced apart in the X direction. One of the two holes is disposed within the area surrounded by the column body 211, and the other is disposed outside the column body 211.

[0014] A reinforcing rib 214 is arranged as necessary on the underside of a portion of the top plate 212 that protrudes outward from the side surface of the column main body 211. The reinforcing rib 214 shown in the figure is a roughly triangular flat plate, and two perpendicular sides are welded to both the underside of the top plate 212 and the side surface (outer peripheral surface) of the column main body 211. For the sake of convenience, in the following description of the column body 211, the web side of the channel steel is referred to as the front, the opposite side as the rear, and the flange side as the side.

[0015] The top plate 212 shown in the figure has an asymmetric shape in the X direction with respect to the pillar body 211. The reinforcing rib 214 is a side rib fixed to one side of the pillar body 211. When the column member 210 has the reinforcing rib 214 only on one side of the column main body 211, it is desirable to arrange the reinforcing rib 214 symmetrically in the X direction in one seismic frame 200 as shown in Fig. 1 (or Fig. 3). That is, the reinforcing rib 214 is arranged on the side where the column members 210, 210 face each other, or the reinforcing rib 214 is arranged on the side where the column members 210, 210 do not face each other. By arranging the reinforcing ribs 214 symmetrically in the X direction in one seismic frame 200, shaking or deformation in the X direction can be suppressed in a well-balanced manner for the entire seismic frame 200. The shape of the top plate 212 and the position and number of the reinforcing ribs 214 are set so as to obtain the required strength depending on the type of steel material (cross-sectional standard) constituting the column body 211, the weight of the piping, and the installation height level of the piping (the length of the column body 211), etc. For example, the pillar member 210 may be provided with one or both of a reinforcing rib (front rib) arranged on the front side of the pillar main body 211 and a reinforcing rib (back rib) arranged on the rear side of the pillar main body. In addition, the pillar member 210 may be provided with reinforcing ribs (side ribs) on both sides of the pillar main body 211.

[0016] <<Horizontal material>> As shown in FIG. 1, the horizontal member 220 is supported by the lower ends of both the pillar members 210, 210. The horizontal member 220 is made of, for example, a channel steel. Horizontal member (object holding part) 220 supports the underside of pipe (object to be held) 100, or supports the lower part of pipe 100 by any appropriate method.

[0017] << Gusset plate >> The gusset plate 230 is a means for joining the horizontal member 220 and each of the column members 210, 210. The gusset plate 230 is also a deformation suppression means for suppressing angular displacement between the horizontal member 220 and each of the column members 210, 210. The gusset plate 230 suppresses deformation of the seismic frame 200 due to shaking in the X direction (deformation of the seismic frame 200 into a parallelogram shape). In one example, the gusset plate 230 is pentagonal in shape. When the column main bodies 211, 211 and the horizontal member 220 are made of channel steel, the column main bodies 211, 211 and the horizontal member 220 are arranged so that the outer surfaces of the respective webs face forward (or backward). The gusset plates 230, 230 are attached to the outer surfaces of the webs of both members, straddling the lower ends of the column main bodies 211, 211 and each end of the horizontal member 220 in the longitudinal direction (X direction). The gusset plates 230, 230 are fastened to the column main bodies 211, 211 and the horizontal member 220 using bolts and nuts.

[0018] [Concrete ceiling] The following describes the targets for mounting the seismic rack. 3(a) and (b) are front views showing schematic diagrams of an example of a concrete ceiling to which a supporting bracket according to one embodiment of the present invention is attached. The concrete ceiling 300 to which the support bracket 1 of an embodiment of the present invention is to be attached is a composite slab and comprises a metal deck plate (ceiling deck plate) 310 (310A, 310B) and a concrete layer 320 poured onto the upper surface of the deck plate 310 and integrated with the deck plate 310.

[0019] The deck plate 310 includes a plurality of convex streaks 315 (rib portions 315A, valley portions 315B) that protrude downward (-Z direction) and extend in the Y direction (first direction), and a plurality of concave streaks 311 (concave streaks 311A, mountain portions 311B) that protrude (or are recessed) upward (+Z direction) and extend in the Y direction, with the convex streaks 315 and the concave streaks 311 alternately repeated in the X direction (second direction) that intersects with the Y direction. Note that reference numeral 312 denotes the lower surface 312 (flat plate portion 312A, lower surface 312B) of the concave streaks 311.

[0020] 3(a) is a so-called flat deck used as a formwork material when pouring concrete for floor and roof slabs. The deck plate 310A includes a rib portion 315A that protrudes downward and extends in the Y direction, and a flat plate portion 312A (the lower surface of the recessed strip portion 311A) that is located above the rib portion 315A and extends in a strip shape in the Y direction. When viewed from below, deck plate 310A has a shape in which rib portions 315A and flat plate portions 312A are alternately repeated in the X direction. The lower portion of rib portion 315A shown in the figure is roughly triangular in cross section (cross section in the ZX plane), and rib portion 315A has lower surface 316A at the bottom that is parallel to the flat plate portion. The upper surface of deck plate 310A is roughly flat. Note that roughly flat does not mean a flat surface in the strict sense, but allows for the presence of unevenness that inevitably occurs during molding, and unevenness or embossing formed on flat plate portion 312A for the purpose of improving strength and design.

[0021] The deck plate 310B shown in Fig. 3(b) is a corrugated deck plate that functions as a structural material itself. The deck plate 310B has valleys 315B that protrude downward and extend in the Y direction, and peaks 311B that protrude upward and extend in the Y direction. The deck plate 310B has a shape in which the valleys 315B and peaks 311B are alternately repeated in the X direction.

[0022] The support bracket 1 can be attached to either of the deck plates 310A, 310B in FIG. As shown in the figures, the column members 210, 210 of the seismic stand are arranged at a predetermined interval in a transverse direction (X direction) that crosses the rib portion 315A and the flat portion 312A in FIG. 3(a), or in a transverse direction (X direction) that crosses the valley portion 315B and the peak portion 311B in FIG. 3(b).

[0023] [First embodiment] A support fitting according to one embodiment of the present invention will be described with reference to Figs. FIG. 4 is a perspective view showing a supporting bracket according to the first embodiment of the present invention. The support bracket 1 is a means for suspending and supporting the seismic stand 200 (and the piping 100) that is the object to be supported from the ceiling. The support bracket 1 is attached to the underside of the concrete ceiling 300 so that its longitudinal direction (X direction) crosses the concave streak portion 311 and the convex streak portion 315 of the deck plate 310. In the following description, it is assumed that the longitudinal direction of the support fitting 1 is perpendicular to the extending direction of the grooves 311 (and the protrusions 315).

[0024] The support bracket 1 comprises a number of upper plates (upper flanges) 20, 20 which are arranged at a distance along the longitudinal direction and which are respectively fixed to the undersides 312 of different recessed rib portions 311 of the deck plate 310; a lower plate (lower flange) 30 which extends along the longitudinal direction and is arranged below the upper plates 20, 20 so that its upper surface faces the undersides of the upper plates 20, 20, and to which at least one of the column members 210 (objects) of the seismic frame 200 is attached; and a connecting plate (web) 40 which connects the upper plates 20, 20 to the lower plate 30 and has a cutout portion 41 which avoids the convex rib portions 315 located between the recessed rib portions 311, 311 to which the upper plates 20, 20 are fixed.

[0025] <<Upper plate>> The upper plates 20 , 20 of the illustrated support bracket 1 are disposed at both longitudinal ends of the support bracket 1 and are fixed to the undersides of adjacent recessed strip portions 311 , 311 of the deck plate 310 . The longitudinal length of the upper plates 20, 20 is set to be equal to or shorter than the length of the lower surface 312 of the groove portion 311 in the X direction. Mounting holes (upper mounting holes) 25, 25 for fixing the support bracket 1 to the deck plate 310 are formed through each of the upper plates 20, 20 at appropriate positions within the plane. An anchor bolt AB protruding downward from the deck plate 310 by being driven into the concrete ceiling 300 or the like is inserted into each mounting hole 25, 25. The support bracket 1 is fixed to the deck plate 310 by screwing a nut N onto the anchor bolt AB protruding from the mounting holes 25, 25. The mounting hole 25 may be an elongated hole extending in the longitudinal direction of the support bracket 1. If the mounting hole 25 is an elongated hole, strict control over the driving position of the anchor bolt AB into the concrete ceiling 300 becomes unnecessary.

[0026] <<Lower board>> The lower plate 30 extends in the longitudinal direction and is disposed below both upper plates 20, 20 at a distance such that its upper surface faces the lower surfaces of both upper plates 20, 20 (in a position parallel to both upper plates 20, 20). At least one of the column members 210 is attached to the lower plate 30. The illustrated support bracket 1 has a longitudinal length shorter than the arrangement interval of the column members 210, 210 constituting one seismic frame 200. Therefore, one column member 210 is attached to the support bracket 1.

[0027] Mounting holes (lower mounting holes) 31, 31, 31 for fastening the pole member 210 to the support bracket 1 using bolts B and nuts N are formed through the lower plate 30 at appropriate in-plane positions. With the mounting holes 31... communicating with the respective holes 213 of the top plate 212 of the pole member 210 shown in FIG. 2, the shafts of bolts B are inserted into the respective holes 31, 213 and nuts N are screwed in, thereby fixing the pole member 210 to the support bracket 1. Here, the mounting holes 31 are elongated holes extending in the longitudinal direction of the support bracket 1. As indicated by the double-headed arrow in Fig. 3, the support bracket 1 is configured so that the mounting position of the pillar member 210 can be adjusted in the X direction. This allows the spacing between the pillar members 210 to be freely set in accordance with the width of the piping 100, regardless of the spacing between the grooved streak portions 311 of the deck plate 310. Also, since the mounting position of the piping 100 can be determined regardless of the position of the grooved streak portion 311, convenience is improved. The position, shape (length), and number of the mounting holes 31 opening in the lower plate 30 are set appropriately within a range that maintains the earthquake resistance of the support bracket 1. The mounting holes 31 may be disposed in a portion of the surface of the lower plate 30 that faces the lower surface 316 of the protruding strip portion 315. The length of the mounting holes 31 in the X direction is set shorter than the distance in the X direction between the holes 213, 213 of the top plate 212. That is, in the lower plate 30, the position and size of each mounting hole 31 is set so that one mounting hole 31 communicates with one hole 213. The mounting position of the column member 210 can be adjusted in the X direction depending on which of the three mounting holes 31 the two holes 213 of the top plate 212 are communicated with.

[0028] <<Connecting plate>> The connecting plate 40 connects the upper plate 20 and the lower plate 30 at an appropriate position in the short side direction (Y direction) of the support bracket 1. In this example, the connecting plate 40 is disposed at one end (rear end) in the short side direction, and connects the upper plate 20 and the lower plate 30 at that location. The support bracket 1 shown in this example is roughly C-shaped (angled C-shaped) in side view. The connecting plate 40 has a notch 41 that avoids the convex streak portion 315 located between the concave streak portions 311, 311 to which the upper plates 20, 20 are fixed. The shape and size of the notch 41 are determined so that the support bracket 1 has the necessary strength to support the seismic frame 200 and the piping 100. Here, for each edge of the connecting plate 40 facing the notch 41, the edges located at both ends of the notch 41 in the longitudinal direction are referred to as the inner edge 40a, and the edge located at the lower end of the notch 41 is referred to as the upper edge 40b. When the support bracket 1 is attached to the deck plate 310, the inner edge 40a faces the side surface 313 (313A, 313B) of the concave streak portion 311, and the upper edge 40b faces the lower surface 316 of the convex streak portion 315. The side surface 313 can also be called the side surface of the convex streak portion 315.

[0029] The shape of the cutout 41 may be such that the inner edge 40a is not parallel to the side surface 313. For example, the cutout 41 shown in FIG. 4 and FIG. 3(a) is such that it is not parallel to either side surface 313A, 313B of the deck plates 310A, 310B. Alternatively, the shape of the cutout 41 may be such that the inner edge 40a extends in parallel along the side surface 313. For example, in the support bracket 1B in FIG. 3(b), the inner edge 40a extends in parallel along the side surface 313B and is attached to the side surface 313B. Furthermore, the size of the cutout 41 may be large enough to avoid only a single convex rib portion 315, or may be large enough to collectively avoid multiple convex rib portions 315, 315.... If the support bracket 1 itself has sufficient rigidity to resist shaking caused by earthquakes and the like, there is no need to bring each edge of the connecting plate 40 facing the cutout 41 into close contact with either the side surface 313 or the underside 312 of the deck plate 310. In the illustrated example, one connecting plate 40 is disposed at one end in the short direction, but the support bracket may include multiple connecting plates. For example, the support bracket may include a connecting plate at each end in the short direction.

[0030] <<Work space and openings>> The support fitting 1 has a working space 50 formed between the lower plate 30 and the upper plates 20, 20. The working space 50 is a space surrounded by the upper plates 20, 20, the lower plate 30, and the connecting plate 40. The working space 50 has openings 51 (52, 53, 53) that communicate between the external space and the working space 50. The illustrated support fitting 1 has a front opening 52 on the front side and side openings 53, 53 on both ends in the longitudinal direction. The work space 50 and the opening 51 are configured so that, when the support bracket 1 is positioned on the deck plate 310, operations such as attaching the support bracket 1 to the deck plate 310 and attaching the column member 210 to the support bracket 1 can be easily performed from the external space through the opening 51. The opening 51 allows objects required for the above work (fastening hardware such as bolts and nuts, tools, and the worker's hands) to be inserted from outside into the work space 50 or removed from the work space 50 to the outside, with the support fitting 1 being positioned on the deck plate 310. By making the entire front surface of the support fitting 1 into the opening 51, the above attachment work can be performed more easily and reliably. In other words, the work of fastening members together using bolts, nuts, etc. can be easily performed, thereby enabling the members to be firmly fixed together.

[0031] Here, height H1 of support bracket 1 is set to be greater than the amount of protrusion of convex rib portion 315 from underside 312. As a result, when support bracket 1 is attached to deck plate 310 as shown in Fig. 3, a predetermined gap is created between underside 316 of convex rib portion 315 and lower plate 30, leaving working space 50 in that portion. If height H2 of cutout portion 41 were equal to the height of convex rib portion 315, working space 50 of height H3 would remain between underside 316 of convex rib portion 315 and lower plate 30. This configuration ensures a continuous working space 50 over the entire longitudinal direction of the support bracket 1, making it possible to efficiently carry out various tasks. In addition, the column member 210 can be attached to the portion of the lower plate 30 located directly below the protruding strip portion 315, increasing the degree of freedom in the position at which the column member 210 is attached.

[0032] <<Examples of materials that make up the support bracket>> The support bracket 1 suspends and supports the seismic stand 200 (and the piping 100) from the ceiling in a state that satisfies the seismic standards so that the seismic stand 200 can exhibit the necessary seismic performance. For this reason, the support bracket 1 is configured to satisfy the seismic standards. The support bracket 1 is configured, for example, from SS material (general structural rolled steel material) or the like. For example, on the working space 50 side, the upper plates 20, 20 and the lower plate 30 have a tapered shape with the thickness gradually increasing from the free end side (front end) towards the connecting plate 40, and the upper plates 20, 20 and the connecting plate 40, and the lower plate 30 and the connecting plate 40 are connected by a curved portion in the shape of a circular arc. A channel steel can be used as such a steel material for the support bracket 1. By using a channel steel, it is possible to ensure strength against a downward load applied to the lower plate 30, particularly near the mounting hole 31. In addition, it is possible to ensure the rigidity required to function as a part of the anti-sway means. A method for manufacturing a support bracket using a channel steel will be described later. Of course, the support fitting 1 may be produced by joining the upper plates 20, 20, the lower plate 30, and the connecting plate 40 together by welding.

[0033] Second Embodiment 5 is a perspective view showing a support fitting according to a second embodiment of the present invention. The support fitting 2 according to this embodiment differs from the first embodiment in that it includes first reinforcing plates (end reinforcing plates) 61, 61 fixed across the upper plate 20, the connecting plate 40, and the lower plate 30 at both ends in the longitudinal direction.

[0034] In the support bracket 2, the upper plate 20 is disposed at both longitudinal ends. At both longitudinal ends of the support bracket 2, the edge positions (end face positions) of the connecting plate 40 and the lower plate 30 and the position of the longitudinal outer edge 22 (end face) of the upper plate 20 are aligned. The illustrated first reinforcing plate 61 is a roughly rectangular flat plate. The longitudinal ends of the upper plate 20, the connecting plate 40, and the lower plate 30 are fixed to the three sides (edges) of the first reinforcing plate 61 by welding.

[0035] The first reinforcing plate 61 shown in Fig. 5 has a shape that entirely closes the side openings 53, 53 shown in Fig. 4, but the first reinforcing plate 61 may have a shape that only partially closes the side openings 53, 53. For example, the first reinforcing plate may be substantially rectangular, with two opposing sides (edges) joined to the edge of the upper plate 20 and the edge of the lower plate 30, respectively. Alternatively, the first reinforcing plate may be substantially inverted triangular in which two adjacent sides are joined to the edge of the upper plate 20 and the edge of the connecting plate 40. Furthermore, the first reinforcing plate may be substantially triangular in which two adjacent sides are joined to the edge of the lower plate 30 and the edge of the connecting plate 40.

[0036] Even if the first reinforcing plate 61 closes all or part of the side opening 53 shown in Figure 4, the work space 50 can be accessed from the outside via the front opening 52, and workability for performing various tasks is ensured, as in the first embodiment. In this example, the first reinforcing plates 61, 61 are arranged at the ends of the support fitting 2 in the longitudinal direction, improving the strength against a downward load applied via the pillar member 210 (FIG. 3, etc.).

[0037] Third Embodiment 6 is a perspective view showing a support fitting according to a third embodiment of the present invention. The support fitting 3 according to this embodiment is characterized in that it is provided with second reinforcing plates (middle reinforcing plates) 62, 62 fixed across the upper plate 20 and the connecting plate 40 at both longitudinal ends of the cutout portion 41 (the longitudinal middle portion of the support fitting 3).

[0038] The illustrated second reinforcing plate 62 is a flat plate having a generally inverted triangular shape. The upper end of the second reinforcing plate 62 is joined to the longitudinal end (inner edge 21, see FIG. 4) of the upper plate 20 located near the cutout 41. The rear end of the second reinforcing plate 62 is joined to the inner edge 40a (see FIG. 4) of the connecting plate 40 that corresponds to both longitudinal ends of the cutout 41. The second reinforcing plate 62 faces a side surface 313 of the recessed strip portion 311 when the support bracket 3 is attached to the deck plate 310 (FIG. 3). The front-to-rear length of the second reinforcing plate 62 is equal to the front-to-rear length of the upper plate 20 (the length of the inner edge 21), and the up-to-down length of the second reinforcing plate 62 is equal to the length of the inner edge 40a extending in the up-to-down direction, but the size of the second reinforcing plate 62 may be other than these. Moreover, the second reinforcing plate 62 may be a flat plate having a shape other than a triangle, such as a rectangle.

[0039] In this example as well, the work space 50 can be accessed from outside through the front opening 52. Even if the support bracket 3 is positioned relative to the concrete ceiling 300, the second reinforcing plate 62 is located close to the side surface 313 of the groove portion 311, so the presence of the second reinforcing plate 62 does not significantly affect the ease of performing various tasks. The second reinforcing plate 62 may or may not be parallel to the side surface 313 of the groove 311. The position of the second reinforcing plate 62 with respect to the side surface 313 of the groove 311 is determined by the shape of the cutout portion 41. By providing the second reinforcing plate 62 that connects the upper plate 20 and the connecting plate 40, the strength of the support bracket 3 is improved.

[0040] The support fitting may be configured to include the second reinforcing plates 62, 62 without including the first reinforcing plates 61, 61. Also, the second reinforcing plate 62 may be used to more firmly fix the support bracket 3 to the concrete ceiling 300. For example, an anchor bolt may be driven into the valley portion 315B of the concrete ceiling 300 shown in Fig. 3(b) through a hole provided at an appropriate position within the surface of the second reinforcing plate 62, and a nut may be screwed onto the anchor bolt to more firmly fix the support bracket 3 to the concrete ceiling. Alternatively, a member may be disposed to apply pressure in a direction separating the side surface 313B of the opposing peak portion 311B and the second reinforcing plate 62.

[0041] [Fourth embodiment] 7 is a perspective view showing a support bracket according to a fourth embodiment of the present invention. The support bracket 4 according to this embodiment includes second reinforcing plates (middle reinforcing plates) 62, 62 having a generally rectangular shape, and a middle plate 70 (third reinforcing plate) connecting lower ends of the second reinforcing plates 62, 62.

[0042] In this example, the second reinforcing plates 62, 62 are generally rectangular. The illustrated middle plate 70 is roughly rectangular and is disposed parallel to the lower plate 30 with its lower surface facing the upper surface of the lower plate 30. The rear end of the middle plate 70 is joined by welding to the upper edge 40b (see FIG. 4) of the connecting plate 40 which corresponds to the lower end position of the cutout portion 41. Both longitudinal ends of the middle plate 70 are joined by welding to the lower ends of the second reinforcing plates 62, 62. The middle plate 70 is fixed across the connecting plate 40 and the second reinforcing plate 62, improving the strength of the support bracket 4.

[0043] When the support bracket 4 is attached to the deck plate 310 (FIG. 3), the middle plate 70 faces the underside 316 of the convex strip portion 315. Mounting holes 71 are formed through the middle plate 70 at appropriate positions within the surface as shown. The mounting holes 71 are used when fixing the middle plate 70 to the convex strip portion 315. An anchor bolt that protrudes downward from the deck plate 310 by being driven into the concrete ceiling 300, for example, can be inserted into the mounting hole 71. By screwing a nut onto the anchor bolt protruding from the mounting hole 71, the support bracket 4 can be secondarily fixed to the convex strip portion 315 of the deck plate 310.

[0044] Fifth embodiment FIG. 8 is a perspective view showing a supporting bracket according to a fifth embodiment of the present invention. In this example, the support fitting shown in the first embodiment (FIG. 4) is extended in the longitudinal direction, and the support fitting is supported by the undersides 316 (see FIG. 3) of more protruding strips 315. The support fitting 5 according to this embodiment has a total of three upper plates 20, 20... at both ends and the middle part in the longitudinal direction, and has notches 41, 41 between each of the upper plates 20, 20... In this way, the support fitting 5 may be supported by the undersides 316 of three or more protruding strips 315.

[0045] When the seismic stand and the piping supported by the seismic stand become larger and heavier, the strength required for support can be ensured by extending the support fittings in the longitudinal direction. The support fitting 5 may include all or any of the first reinforcing plate 61, the second reinforcing plate 62, and the middle plate 70 shown in the second to fourth embodiments. In this case, the support fitting can enjoy the respective effects obtained by including each reinforcing plate or middle plate.

[0046] Sixth embodiment 9 is a perspective view showing a support fitting according to a sixth embodiment of the present invention. In the support fitting 6 according to this embodiment, the connecting plate 40 is disposed in the middle part in the short side direction, and connects the upper plate 20 and the lower plate 30 at that part. The support fitting 6 shown in this example is roughly H-shaped in side view. The mounting holes 25, 25, 31 opening in the upper plates 20, 20 and the lower plate 30 are arranged in locations that avoid the joints with the connecting plate 40. In this example, the mounting holes 25, 25, 31 are formed penetrating both in front of and behind the connecting plate 40. The longitudinal positions of the mounting holes 25, 25, 31 are the same as in the first embodiment.

[0047] The connecting plate 40 is disposed at the intermediate portion in the short-side direction of the support bracket 6, so that working spaces 50, 50 are formed in front of and behind the connecting plate 40, respectively. Each working space 50 has an opening 51 (52-54) that connects the working space 50 to an external space. The working space 50 located in front of the connecting plate 40 has a front opening 52 and a side opening 53. The working space 50 located behind the connecting plate 40 has side openings 53 at both ends in the width direction and a rear opening 54 on the rear surface.

[0048] As in the first embodiment, the support bracket 6 may be fabricated by welding together the upper plates 20, 20, the lower plate 30, and the connecting plate 40, or may be fabricated by processing an H-shaped steel. By using an H-shaped steel, it is possible to ensure strength against a downward load applied to the lower plate 30, particularly near the mounting hole 31.

[0049] The support fitting 6 may include all or any of the first reinforcing plate 61, the second reinforcing plate 62, and the middle plate 70 shown in the second to fourth embodiments. In this case, the support fitting can enjoy the respective effects obtained by including each reinforcing plate or middle plate.

[0050] Seventh embodiment FIG. 10 is a perspective view showing a supporting bracket according to a seventh embodiment of the present invention. The support bracket 7 in this embodiment comprises an upper plate 20 fixed to the underside 312 of the concave rib portion 311 of the deck plate 310, a middle plate 70 fixed to the underside 316 of the convex rib portion 315, a lower plate 30 spaced apart from the upper plate 20 and the middle plate 70 so as to extend in the longitudinal direction below the upper plate 20 and the middle plate 70 in a parallel orientation to the upper plate 20 and the middle plate 70, and to which the column member 210 (object) of the seismic frame 200 is attached, and a connecting plate 40 connected to the upper plate 20, the middle plate 70, and the lower plate 30. Mounting holes 25, 31 are formed penetrating through the surfaces of the upper plate 20 and the lower plate 30. Each of the mounting holes 25, 31 is similar to that described in the first embodiment and the like. The connecting plate 40 has a step portion 43 that avoids the protruding strip portion 315. In this example, the inner end edge 40a faces the step portion 43. The longitudinal length of the middle plate 70 is set to a length necessary for fixing to the deck plate 310. For example, it is set to be equal to the X-direction length of the lower surface 316B of the valley portion 315B shown in Fig. 3(b), but it may be longer or shorter than this. Mounting holes 71 for fixing the support bracket 7 to the deck plate 310 are formed through the intermediate plate 70 at appropriate positions within its surface. The method of using the mounting holes 71 is as explained in the fourth embodiment (FIG. 7).

[0051] The support fitting 7 has a working space 50 and a plurality of openings 51 (52, 53A, 53B) that communicate between the external space and the working space 50. The support fitting 7 has a front opening 52 on the front side and side openings 53 (53A, 53B) on both ends in the longitudinal direction. The front opening 52 is configured to include an opening formed between the lower plate 30 and the upper plate 20, and an opening formed between the lower plate 30 and the middle plate 70. The side opening 53A located on the left side of the figure is formed by the upper plate 20, the connecting plate 40, and the lower plate 30, and has the same configuration as the side opening 53 shown in the first embodiment (FIG. 4). The side opening 53B located on the right side of the figure is formed by the middle plate 70, the connecting plate 40, and the lower plate 30.

[0052] This example also makes it possible to fix the earthquake-resistant frame 200 to a concrete ceiling. In addition, with the support bracket 7 positioned on the deck plate 310, the working space 50 can be accessed through the opening 51, improving workability. The support fitting 7 may include various reinforcing plates as shown in Figs. 5 to 7. Specifically, the support fitting 7 may include a first reinforcing plate at the end in the longitudinal direction, which closes all or part of the side openings 53A and 53B. The reinforcing plate that closes all of the side opening 53B is disposed straddling the middle plate 70, the connecting plate 40, and the lower plate 30. The support fitting 7 may include a second reinforcing plate 62 (see Figs. 6 and 7) at the intermediate portion in the longitudinal direction, which is fixed straddling all or any of the upper plate 20, the connecting plate 40, and the middle plate 70.

[0053] Eighth embodiment FIG. 11 is a perspective view showing a supporting bracket according to an eighth embodiment of the present invention. The support bracket 8 is configured to have middle plates 70, 70 at both ends in the longitudinal direction, and an upper plate 20 in the middle in the longitudinal direction. The configurations of the middle plate 70 and the upper plate 20 are similar to those shown in the above embodiments, and therefore description thereof will be omitted. This example also makes it possible to fix the earthquake-resistant frame 200 to the concrete ceiling 300. In addition, with the support bracket 8 positioned on the deck plate 310, the working space 50 can be accessed through the opening 51, improving workability. The support fitting 8 may be equipped with various reinforcing plates as shown in FIGS.

[0054] [Manufacturing method] The support fittings 1 to 8 can be produced by welding together the upper plate 20, the lower plate 30, the connecting plate 40, etc. The support fittings 1 to 5, 7, and 8 can also be produced by processing channel steel. A method for producing the support fittings 1 to 3 using channel steel will be described below. 12(a) to 12(d) are perspective views illustrating a method for producing a support bracket from a channel steel. First, as shown in Fig. 12(a), a channel steel 80 having a predetermined longitudinal length is prepared (preparation step). The longitudinal length of the channel steel 80 is determined according to the overall longitudinal length of the support fitting to be produced. A removal portion 85 to be removed from the channel steel 80 is set in a longitudinal middle portion of one flange 81 (upper flange 81U) of the channel steel 80 and in a part of the web 83 continuing from the longitudinal middle portion on the upper flange 81U side. In the drawing, the boundary between the removal portion 85 and other portions is indicated by a dashed line.

[0055] As shown in FIG. 12(b), in the longitudinal middle portion of the channel steel 80, the upper flange 81U and the upper portion of the web 83 are continuously cut out (the removed portion 85 is removed) to form the cutout portion 41 (removal process). As a result, the remaining portion of the upper flange 81U becomes the upper plates 20, 20 that are fixed to the underside 312 of the concave strip portion 311 of the deck plate 310. The portion equivalent to the removed portion 85 becomes the portion that avoids the convex strip portion 315 of the deck plate 310. The portion removed from the web 83 becomes the cutout portion 41. The lower flange 81L becomes the lower plate 30, and the remaining portion of the web 83 becomes the connecting plate 40. Mounting holes 25 are formed through the upper plates 20 at appropriate positions within the plane of the upper plates 20. Mounting holes 31, 31, 31 are formed through the lower plate 30 at appropriate positions within the plane of the lower plate 30. Through the above steps, the support fitting 1 (FIG. 4) shown in the first embodiment is completed.

[0056] Furthermore, as shown in FIG. 12(c), first reinforcing plates 61, 61 are joined to both ends of the support bracket 1 in the longitudinal direction, thereby completing the support bracket 2 (FIG. 5) shown in the second embodiment. Furthermore, as shown in FIG. 12(d), second reinforcing plates 62, 62 are joined to both longitudinal ends of the cutout portion 41, thereby completing the support bracket 3 (FIG. 6) shown in the third embodiment. Similarly, when the second reinforcing plates 62, 62 are rectangular, the support bracket 4 (FIG. 7) shown in the fourth embodiment is completed by joining the middle plate 70 across the lower ends of the second reinforcing plates 62, 62. The support bracket 5 (FIG. 8) can be produced by the above-mentioned method by appropriately setting the longitudinal length of the prepared channel steel 80 and the position of the removed portion 85. The support brackets 7 and 8 (FIGS. 10 and 11) can be fabricated in the same manner as above. The above steps may be carried out in an interchangeable manner.

[0057] In this way, the support brackets can be easily manufactured by processing the channel steel 80. In addition, the flanges 81U, 81L of the channel steel 80, which is also used as a structural member, are tapered from the end edges (front side in the figure) of the flanges 81U, 81L toward the web 83 (rear side in the figure), and are shaped to suppress deformation in the direction in which the angle of the flanges 81U, 81L with respect to the web 83 increases. Therefore, the strength required to support the seismic frame (and piping) can be easily ensured.

[0058] The support bracket 6 (FIG. 9) can be easily manufactured by subjecting an H-shaped steel having a predetermined longitudinal length to processing similar to that shown in FIG. 12(a) and (b). If necessary, processing similar to that shown in FIG. 12(c) and (d) may be additionally performed, or a middle plate 70 (FIG. 7) may be joined.

[0059] [Analysis results] Fig. 13 is a diagram for explaining the analysis content of the support fitting shown in Fig. 5 (second embodiment). In this analysis, whether the support fitting 2 can withstand a pull-out force due to a horizontal earthquake load was analyzed by the finite element method using the analysis software midas igen. The specifications of the support fittings analyzed are as follows: Base channel steel: 180 x 75 x 7 x 10.5 [mm] Longitudinal length of channel steel: 320 mm Size of the first reinforcing plate: 180 x 75 x t5 [mm] Width of cutout (longitudinal length): 120 mm Height of cutout: 100 mm (length from the top surface of the upper plate to the upper edge 40b) Size of mounting hole 25: 40 x 20 [mm] Size of mounting hole 31: 80 x 20 [mm] Distance between mounting holes 31: 20 mm Steel material used for support bracket: SS400 Bolt size for supporting column: M16

[0060] As shown in the figure, the length of the column members 210A, 210B of the earthquake-resistant frame 200 is 2500 mm, and the interval between the column bodies 211, 211 is 1000 mm. The weight of the earthquake-resistant frame 200 is 100 kg, the weight of the pipe 100 is 900 kg, and the load borne by one earthquake-resistant frame 200 is set to 1000 kg. Furthermore, it is assumed that a horizontal load of 1000 kg (1 G) due to an earthquake is applied to the lower end portion (position 2500 mm below the support metal fitting 2) of one of the column members 210A. First, the pull-out force (in the direction of gravity) acting on the column member 210A on the side to which the horizontal load was applied was calculated by structural calculation. The pull-out force was 3250 kg. This pull-out force was applied to the longitudinal center of the mounting holes 31B and 31C (the mounting positions of the bolts B and B) shown by the diagonal lines in the figure, and a finite element analysis was performed. In addition, the calculations were made assuming that the entire surface of each of the upper plates 20 of the support bracket 2 was fixed to the concrete ceiling 300. In the figure, the maximum stress occurred at part 45 of the support bracket 2 (around the corner of the notch 41) indicated by the dashed circle, and the magnitude was 190kN / mm^2. This is below the yield stress of 240kN / mm^2 of the SS400 material that constitutes the support bracket 2, demonstrating the safety of using the support bracket under the conditions of a column length of 2500mm and a piping load of 900kg. The load on the pipe 100 at the yield stress of the SS400 material was 1160kg.

[0061] [Summary of the embodiments, functions and effects of the present invention] <First embodiment> In this embodiment, support brackets 1 to 8 are attached to the underside of a ceiling deck plate 310, which has a convex rib portion 315 protruding downward and extending in a first direction (Y direction) and a concave rib portion 311 protruding upward and extending in the first direction, repeating in a second direction (X direction) that intersects the first direction, so that the longitudinal direction intersects the convex rib portion and the concave rib portion, thereby suspending and supporting an earthquake-resistant frame 200. Here, the earthquake-resistant stand includes a pair of pillar members 210, 210 arranged at a predetermined interval in the second direction, and an object holding part (horizontal member 220) that is supported by the lower ends of both pillar members and holds an object to be held (piping 100, which is a heavy object). The object holding part is, for example, a horizontal member that supports the lower surface of the object to be held.

[0062] The support fitting in this embodiment comprises a plurality of upper plates 20 (upper flanges) arranged at a distance in the longitudinal direction and each fixed to the underside of a different concave portion of the ceiling deck plate, a lower plate 30 (lower flange) extending in the longitudinal direction (X direction) and arranged below both upper plates so that its upper surface faces the undersides of both upper plates and to which at least one of the column members is attached, a connecting plate 40 (web) connecting each upper plate to the lower plate and having a cutout 41 which avoids the convex portion located between each concave portion to which each upper plate is fixed, and a working space 50 formed between the lower plate and each upper plate. This work space has openings (front opening 52, rear opening 54) that connect the work space to the external space in at least one of the front-to-rear directions (Y direction) that intersect with the longitudinal direction, and is characterized in that, when the support bracket is positioned on the ceiling deck plate, the installation of the support bracket to the ceiling deck plate and the installation of the column member to the support bracket can be performed from the external space through the openings.

[0063] The ceiling deck plate may be a flat deck plate 310A used as a formwork material when pouring concrete for the floor and roof slabs, or a corrugated deck plate 310B that functions as a structural member in itself. The connecting plate is disposed at any position in the front-rear direction of the support bracket. The openings allow objects (tools, bolts, nuts, worker's hands, etc.) required for each of the above installation operations to be inserted into the work space from outside or removed from the work space to the outside when the support fitting is positioned on the ceiling deck plate. In the support fitting, the above installation operations can be performed from the external space through the openings. The openings may be provided on the side of the support fitting (side openings 53). In the support fitting, by making the entire front or rear surface, in particular, an opening, the above installation operations can be performed more easily and reliably. In other words, the fastening operations between components using bolts, nuts, etc. can be easily performed, and each component can be firmly fixed. In addition, it is desirable that the support fittings are configured so that, when positioned on the ceiling deck plate, a working space remains between the underside of the ridge portion of the ceiling deck plate and the lower plate. This makes it possible to attach the column member to the part of the lower plate located directly below the ridge portion, increasing the degree of freedom in the attachment position of the column member. According to this aspect, the installation work on the ceiling deck plate and the installation work on the earthquake-resistant rack that supports the piping can be easily performed. Also, each member can be firmly fastened to each other. Here, the cutout portion may be rectangular, or may be in the shape of an inverted trapezoid in which the edge of the connecting plate is attached to the side of the convex portion of the ceiling deck plate (particularly the corrugated deck plate).

[0064] <Second embodiment> In the support brackets 1 to 8 of this embodiment, a mounting hole 31 for fastening the column member 210 is formed through the surface of the lower plate 30, and the mounting hole is a long hole extending in the longitudinal direction of the support bracket. The mounting holes are used when fastening the column member to the lower plate using bolts B and nuts N. By making the mounting holes elongated holes, the mounting position of the column member relative to the lower plate can be adjusted along the elongated holes. According to this embodiment, the mounting position of the column member can be adjusted according to the width of the piping 100 regardless of the interval of the lower surface 312 of the groove portion 311 of the deck plate 310 .

[0065] <Third embodiment> The supporting fittings 2 to 4 according to this embodiment are characterized in that they are provided with a first reinforcing plate 61 fixed across the upper plate 20, the connecting plate 40, and the lower plate 30 at both ends in the longitudinal direction. In this embodiment, the longitudinal end face positions of the upper plate, the connecting plate, and the lower plate are aligned at the longitudinal end of the support fitting, and the first reinforcing plate is fixed to the end face of each plate by welding, etc. The first reinforcing plate improves the strength against a downward load applied to the support fitting. By disposing the first reinforcing plate, at least a part of the openings located at both ends in the longitudinal direction of the working space 50 is closed by the first reinforcing plate, but the openings on the front or rear (front opening 52, rear opening 54 shown in FIG. 9) are not closed. The presence of the openings on the front or rear ensures the ease of installation of the support brackets and the pillar members.

[0066] <Fourth embodiment> The support fittings 3 and 4 according to this embodiment are characterized in that they are provided with second reinforcing plates 62 fixed across the upper plate 20 and the connecting plate 40 at both ends of the cutout portion 41 in the longitudinal direction. The second reinforcing plate improves the strength of the support bracket against a downward load applied to the support bracket at a longitudinally intermediate portion of the support bracket.

[0067] <Fifth embodiment> This embodiment is a manufacturing method for support fittings 1 to 8 that are attached to the underside of a corrugated ceiling deck plate 310 having a convex rib portion 315 protruding downward and extending in a first direction (Y direction) and a concave rib portion 311 protruding upward and extending in the first direction that repeats in a second direction (X direction) that intersects the first direction, with the longitudinal direction intersecting the convex rib portion and the concave rib portion, thereby suspending and supporting an earthquake-resistant frame 200. The manufacturing method of the support bracket in this embodiment is characterized by comprising a preparation step (Figure 12(a)) of preparing a channel steel 80 or H-shaped steel having a predetermined longitudinal length, a removal step (Figures 12(a)-(b)) of continuously removing the entire short side of the upper flange 81U and at least the upper part of the web 83 at an appropriate location in the longitudinal middle part of the channel steel or H-shaped steel to form a cutout portion 41 that avoids the convex strip portion of the ceiling deck plate and making the remaining part of the upper flange into an upper plate 20 that is fixed to the underside of the concave strip portion of the ceiling deck plate, a step of penetrating and forming an upper mounting hole (mounting hole 25) at an appropriate location in the plane of the upper flange for attaching the support bracket to the underside 312 of the concave strip portion 311 of the ceiling deck plate (Figure 12(b)), and a step of penetrating and forming a lower mounting hole (mounting hole 31) at an appropriate location in the plane of the lower flange 81L for attaching a seismic stand. By making support brackets for supporting heavy loads from channel steel or H-shaped steel, support brackets with the required strength can be easily and quickly produced in large quantities. [Explanation of symbols]

[0068] B...bolt, N...nut, 1-8...support bracket, 20...upper plate, 21...inner edge, 22...outer edge, 25...mounting hole (upper mounting hole), 30...lower plate, 31...mounting hole (lower mounting hole), 40...connecting plate, 40a...inner edge, 40b...upper edge, 41...notch, 43...step, 45...part, 50...work space, 51...opening, 52...front opening, 53...side opening, 54...rear opening, 61...first reinforcing plate, 62...second reinforcing plate, 70...middle plate, 71...mounting hole, 80...channel steel, 81...flange, 81L...lower flange, 81U...upper flange, 83...web, 85...removal part, 100...piping (retaining object), 110...ceiling, 20 0...earthquake-resistant frame, 210...column member, 211...column body, 212...top plate, 213...hole, 214...reinforcing rib, 220...horizontal member (object holding portion), 230...gusset plate, 300...concrete ceiling, 310, 310A, 310B...deck plate, 311, 311A...concave portion, 311B...ridge portion, 312...underside (of concave portion), 312A...flat plate portion, 312B...underside (of ridge portion), 313, 313A, 313B...side surface, 315...ridge portion, 315A...rib portion, 315B...valley portion, 316...underside (of convex portion), 316A...underside (of rib portion), 316B...underside (of valley portion), 320...concrete layer

Claims

1. A support bracket for suspending and supporting an earthquake-resistant platform, the support bracket having a convex portion that protrudes downward and extends in a first direction and a concave portion that protrudes upward and extends in the first direction, the convex portion and the concave portion repeating in a second direction intersecting the first direction, the support bracket being attached to an underside of a ceiling deck plate such that the longitudinal direction intersects the convex portion and the concave portion, The earthquake-resistant stand includes a pair of pillar members arranged at a predetermined interval in the second direction, and an object holder supported by lower ends of the pillar members and configured to hold an object to be held, The support bracket is A plurality of upper plates are arranged apart in the longitudinal direction and fixed to lower surfaces of different recessed portions of the ceiling deck plate, a lower plate extending in the longitudinal direction and disposed below the upper plates such that an upper surface of the lower plate faces the lower surfaces of the upper plates, and to which at least one of the pillar members is attached; a connecting plate that connects the upper plates and the lower plate and has a notch that avoids the protruding portions located between the recessed portions to which the upper plates are fixed; A working space is formed between the lower plate and each of the upper plates, The work space has an opening in at least one of the forward and backward directions intersecting the longitudinal direction, which connects the work space with an external space, and when the support bracket is positioned on the ceiling deck plate, the installation work of the support bracket to the ceiling deck plate and the installation work of the column member to the support bracket can be performed from the external space through the opening.

2. 2. The support bracket according to claim 1, wherein a mounting hole for fastening the column member is formed through the surface of the lower plate, the mounting hole being a long hole extending in the longitudinal direction.

3. The support bracket according to claim 1, further comprising a first reinforcing plate fixed across the upper plate, the connecting plate, and the lower plate at both ends in the longitudinal direction.

4. The support bracket according to claim 1, further comprising a second reinforcing plate fixed across the upper plate and the connecting plate at both ends of the cutout in the longitudinal direction.

5. A method for manufacturing a support fitting for suspending and supporting an earthquake-resistant frame, the support fitting being attached to an underside of a ceiling deck plate having a convex streak portion that protrudes downward and extends in a first direction and a concave streak portion that protrudes upward and extends in the first direction, the convex streak portion and the concave streak portion repeating in a second direction intersecting the first direction, with the longitudinal direction intersecting the convex streak portion and the concave streak portion, A preparation step of preparing a channel steel or H-shaped steel having a predetermined longitudinal length; a removal process in which the entire upper flange in the short direction and at least the upper part of the web are continuously removed at an appropriate location in the middle of the longitudinal direction of the channel steel or the H-shaped steel to form a cutout portion that avoids the convex strip portion of the ceiling deck plate, and the remaining part of the upper flange is used as an upper plate that is fixed to the underside of the concave strip portion of the ceiling deck plate; A step of penetrating and forming an upper mounting hole at an appropriate position within the surface of the upper flange for mounting the support bracket to the underside of the recessed portion of the ceiling deck plate; A step of forming a lower mounting hole for mounting the seismic frame at a suitable position within the surface of the lower flange; A method for manufacturing a support fitting, comprising the steps of:

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