JP2020094678A - Steel material attachment metal fixture for suspension bolt - Google Patents

Abstract

To provide a steel material attachment metal fixture for a suspension bolt for easily and accurately attaching the suspension bolt for suspending a steel material for placing piping to a floor slab or the like.SOLUTION: In a steel material attachment metal fixture for a suspension bolt for fixing and attaching a steel material for placing piping to the suspension bolt which is suspended at a floor slab or the like to a pair of grip members for gripping the steel material from both sides of the suspension bolt, the pair of grip members are formed by bending thin steel plates, formed into substantially U-shapes composed of baseboards and upper and lower side plates, and grip recesses fit to a single face of the suspension bolt are formed at the upper and lower side plates. A first bolt shaft is firmly attached to one baseboard, thus forming a first grip member, a through-hole into which the first bolt shaft of the first grip member is inserted is formed at the other baseboard, thus forming a second grip member, the first bolt shaft of the first grip member is inserted into the through-hole of the second grip member, and an advanceable and retractable pressing nut is screwed into the first bolt shaft of the first grip member from the outside.SELECTED DRAWING: Figure 1

Description

The present invention relates to a steel material fitting for a hanging bolt for fixing a steel material for supporting a pipe or the like between hanging bolts suspended on a floor slab or the like at a desired height in equipment construction.

Conventionally, as a metal fitting for attaching a steel material to a suspension bolt suspended on a floor slab of this kind, for example, a suspension bolt is clamped by a pair of clamp bodies having a semicircular fitting recess, and the clamp body and the steel material are A method in which a steel material is supported on a hanging bolt by fastening with two tightening bolts that straddle the hanging bolt (Patent Document 1), and a holding body having a pressing surface that covers approximately half of the outer peripheral surface of the hanging bolt. One in which a suspension bolt is sandwiched between steel members, and the suspension bolt is clamped by two tightening bolts to support the steel member in the suspension bolt (Patent Document 2), and a long nut is vertically divided. Then, attach the U bolt to the suspension bolt by welding or the like, sandwich the suspension bolt with the other clamp body, pass the threaded portion of the U bolt through the through hole of the steel material, and tighten the nut to secure the steel material to the suspension bolt. A supporting device (Patent Document 3) is disclosed. In these prior arts, two bolts and nuts are required for tightening the clamp body and the steel material for each position of the hanging bolt, and four bolts are required when supporting both ends of the steel material, and the number of fixing points is increased. Therefore, it takes time to install and work efficiency deteriorates. Since it is necessary to attach the holding body to the suspension bolt and the holding body and the steel material at the same time, it is difficult to finely adjust the mounting position of the steel material, and as a result, there arises a problem that the mounting accuracy deteriorates.

In addition, the clamp body is attached to the suspension bolt and the clamp body and the steel material are attached separately, and one end of a pair of clamp bodies vertically divided into a cylindrical shape is used as a hinge and the other end is used. Tighten the holding body to a desired height of the suspension bolt by screwing with the bolt, and then fix the holding body to the suspension bolt by tightening the tightening bolt when the position is decided. It is disclosed that a receiving part is attached and a pipe is inserted into the receiving part. (Patent Document 4)
In Patent Document 4, since the engaging portion of the holding body to the suspension bolt is a pair of nut members divided into two parts, it is necessary to engrave a screw on the holding body, which requires a member and a space. The processing becomes complicated, and moreover, since the holding body is composed of a pivotal support portion and a holding means for forming a hinge, or a receiving portion into which a pipe is inserted, the number of constituent parts increases and the manufacturing cost increases. At the same time, there are many parts to be assembled at the time of attaching the holding body and the pipe, and there is a problem that there is a risk that the parts may drop when working at a high place.

Utility model registration No. 3151654 Utility model registration No. 3152477 Patent No. 5729849 Actual Kaihei 02-121615

The present invention has been made in view of the above-described conventional problems, and an object thereof is to temporarily attach a steel material mounting bracket to a suspension bolt by separately mounting a steel material mounting bracket to a suspension bolt and mounting a steel material. By doing so, the steel material can be easily and accurately attached to an arbitrary position of the suspension bolt, and in terms of manufacturing, the processing is simple, and the manufacturing cost is reduced by reducing the number of parts.

As a means therefor, claim 1 of the present invention is for a suspension bolt for fixing a steel material for mounting a pipe on a suspension bolt suspended on a floor slab or the like to a pair of clamping members for clamping the suspension bolt from the outside in the circumferential direction of the suspension bolt. In the steel material mounting bracket, the pair of holding members are formed by bending a thin steel plate into a substantially U shape composed of a substrate and upper and lower side plates, and the upper and lower side plates respectively contact one side of the hanging bolt. A holding recess for contacting and holding is formed, a first bolt shaft is fixed to one of the substrates to form a first holding member, and the first bolt shaft of the first holding member is inserted into the other substrate. To form a second pinching member, the first bolt shaft of the first pinching member is inserted into the through hole of the second pinching member, and the first bolt of the first pinching member is inserted from the outside thereof. A push nut that can be advanced and retracted by being screwed onto a shaft is screwed, and the hanging bolt can be held by the holding recess of the first holding member and the holding recess of the second holding member. It is characterized by

According to a second aspect of the present invention, in the first aspect, the second bolt shaft projecting in a direction opposite to the projecting direction of the first bolt shaft is fixed to the substrate of the first holding piece, and the second bolt shaft is provided. It is characterized in that a tightening nut which is screwed into and is movable back and forth is provided.

According to a third aspect of the present invention, in the first or second aspect, the upper plates of the first sandwiching member and the second sandwiching member, the lower plates of the first sandwiching member and the second sandwiching member, respectively. By connecting with the hinge portion, the first holding member and the second holding member can be opened and closed in a direction of holding or not holding the hanging bolt with the hinge portion as a pivot.

According to claim 1 of the present invention, the joint recesses provided in the upper and lower side plates of the first holding member and the second holding member hold the holding bolt from the side surface and tighten the pressing nut to fix the holding bolt at a predetermined position. After fixing the steel mounting bracket for suspension bolts (hereinafter referred to as the main bracket), insert the through hole provided at an arbitrary position of the steel into the first bolt shaft to support it, and tighten the tightening nut on the first bolt shaft. By doing so, the steel material can be fixed to the metal fitting. That is, it is possible to attach the metal fittings to the suspension bolts and the steel material in separate steps, and it is not necessary to attach the metal fittings and the steel material to the suspension bolts at the same time, so that the height of the metal fittings can be finely adjusted. It is easy to do and the construction accuracy can be improved.

Further, the parts constituting the metal fitting are a pair of holding members bent into a substantially U-shape by press working, which is easy to process, the number of parts is small, and the manufacturing cost can be suppressed.

According to the second aspect of the present invention, since the second bolt shaft projecting to the side opposite to the projecting direction of the first bolt shaft is fixed to the substrate of the first holding piece, the through hole provided at the arbitrary position of the steel material. The steel material can be fixed to this metal fitting by inserting it through and tightening it with a tightening nut.

According to claim 3 of the present invention, the upper plates of the first sandwiching member and the second sandwiching member, and the lower plates of the first sandwiching member and the second sandwiching member are connected by a hinge portion. Therefore, when attaching to the suspension bolt, it is possible to easily open and close the first clamping member and the second clamping member with the hinge portion as a pivot in the direction of clamping or non-clipping the suspension bolt.

It is a perspective view which shows the metal fittings of Embodiment 1 of this invention. It is a side view which shows the metal fittings of Embodiment 1 of this invention. It is explanatory drawing which shows the metal fittings of Embodiment 1 of this invention. It is explanatory drawing which shows the attachment state of the metal fittings of Embodiment 1 of this invention. It is a side view which shows the use condition of the metal fittings of Embodiment 1 of this invention. It is a FIG. 1 equivalent view which shows the metal fittings of Embodiment 2 of this invention. It is a figure equivalent to FIG. 3 which shows the metal fittings of Embodiment 2 of this invention. It is a FIG. 1 equivalent view which shows the metal fittings of Embodiment 3 of this invention. It is a FIG. 2 equivalent view which shows the metal fittings of Embodiment 3 of this invention. It is a FIG. 3 equivalent view which shows the metal fittings of Embodiment 3 of this invention. It is a 4 equivalent figure which shows the attachment state of the metal fittings of Embodiment 3 of this invention. It is a perspective view which shows the use condition of the metal fittings of Embodiment 3 of this invention. It is a side view which shows another usage condition of the metal fittings of Embodiment 3 of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
First, Embodiment 1 of the present invention will be described with reference to FIGS.
As shown in FIG. 1 to FIG. 3, 10 is a first sandwiching member, which is a substantially U-shaped member composed of a first substrate 11, a first upper plate 12a, and a first lower plate 12b formed by bending a thin steel plate by pressing. The first upper side plate 12a and the first lower side plate 12b each have a substantially semi-circular first upper side holding recess 13a and a first lower side holding recess 13b that hold the outer circumference of the suspension bolt A, respectively. Is provided on the same axis. Reference numeral 14 denotes a first bolt shaft vertically provided by welding on the substrate 11 of the first holding member 10, and a screw 14a is formed on the tip side thereof. The fixed position of the first bolt shaft 14 is preferably provided so as to be as close as possible to the sandwiched hanging bolt A. This is to shorten the interval between the fixed position of the hanging bolt A and the fixed position of the steel material C and to generate a moment of force. This is because the load applied to the steel material C is efficiently supported by the metal fitting 1 by reducing

Reference numeral 20 denotes a second holding member. The second substrate 21 is formed by bending a thin steel plate by press work so that the height of the first holding member 10 can be set between the first upper plate 12a and the first lower plate 12b. And a second upper side plate 22a and a second lower side plate 22b are formed into a substantially U-shape, and the second upper side plate 22a and the second lower side plate 22b each have a substantially semicircular shape that holds the outer circumference of the suspension bolt A. The second upper sandwiching concave portion 23a and the second lower sandwiching concave portion 23b are coaxially provided. Reference numeral 24 denotes a long hole provided in the base plate 21 of the second holding member 20, into which the first bolt shaft 14 of the first holding member 10 is inserted. The first upper sandwiching recess 13a of the first sandwiching member 10, the second upper sandwiching recess 23a of the second sandwiching member 20, the first lower sandwiching recess 13b of the first sandwiching member 10 and the second sandwiching member 20 of the second sandwiching member 20. (2) The hanging bolts A are sandwiched one by one from the outer side in the circumferential direction with the opening sides of the lower sandwiching concave portions 23b facing each other. Further, the pressing nut 30 is screwed onto the screw 14 a of the first bolt shaft 14 with the first bolt shaft 14 inserted into the elongated hole 24.

Here, it is described that the height between the upper plate 22a and the lower plate 22b of the second holding member 20 is a height that can be accommodated between the upper plate 12a and the lower plate 12b of the first holding member 10, but the first holding member is not shown. The height may be the same as 10, and the upper and lower side plates may face each other. Conversely, the height between the upper plate 12a and the lower plate 12b of the first holding member 10 may be set to a height that can be accommodated between the upper plate 22a and the lower plate 22b of the second holding member 20. The second sandwiching member 20 and the first sandwiching member 10 may have the same height and may be provided so as to be vertically shifted and overlapped.
Further, the holding recesses 13a, 13b, 23a, 23b are formed in a semicircular shape for holding the side surface of the suspension bolt A, but the shape is not limited to this and it is sufficient if the suspension bolt A can be sandwiched. It may have a V-shape, a substantially U-shape, or a substantially L-shape.

Next, a state in which the suspension bolt A is clamped will be described based on FIGS. 4(A) to 4(D). As shown in FIG. 4A, the metal fitting 1 is prepared for the hanging bolt A. Then, as shown in FIG. 4B, the second sandwiching recesses 23a and 23b of the second sandwiching member 20 which face the first sandwiching recesses 13a and 13b of the first sandwiching member 10, respectively, are relatively disposed. , Open slightly larger than the outer diameter of the hanging bolt A, and move it in the direction of the arrow. Next, as shown in FIG. 4C, the first holding member 10 and the second holding member 20 are moved in the arrow direction. As a result, the first sandwiching recesses 13a and 13b provided in the first upper and lower side plates 12a and 12b of the first sandwiching member 10 and the second sandwiching plates 22a and 22b of the second sandwiching member 20, respectively. The recesses 23a, 23b sandwich the suspension bolts A from the outside in the circumferential direction, one by one. Then, as shown in FIG. 4(D), while the suspension bolt A is sandwiched between the first sandwiching member 10 and the second sandwiching member 20, the pressing nut 30 is tightened so that the suspension bolt A is placed at a predetermined position on the metal fitting. Fix 1 Thereafter, as shown in FIG. 5, a through hole C1 provided at an arbitrary position of the steel material C is externally inserted into and supported by the first bolt shaft 14 from the outside of the pressing nut 30, and the tightening nut 31 is attached to the first bolt shaft 14. Fasten. By this work, the steel material C can be fixed to the metal fitting 1. That is, the attachment of the metal fitting 1 to the hanging bolt A and the attachment of the steel material C can be divided into separate steps, and it is not necessary to attach the metal fitting 1 and the steel material C to the hanging bolt A at once. It is easy to finely adjust the height of the metal fitting 1, and the construction accuracy can be improved.

The parts constituting the metal fitting 1 are composed of a pair of holding members 10 and 20 bent into a substantially U shape by press working, a first bolt shaft 14 welded to the first holding member 10 and a pressing nut 30. Therefore, the processing is simple, the number of parts is small, and the manufacturing cost can be suppressed. Further, since the metal fitting 1 is assembled and integrated in advance, only the tightening nut 31 for tightening the steel material is a separate body, and is not integrated when assembled at the work site. Since the number of body parts can be reduced, it is possible to reduce the risk of parts falling when working in high places and to use a metal fitting that also considers safety.

(Embodiment 2)
The second embodiment of the present invention will be described with reference to FIGS. 6 and 7. In the second embodiment, only parts different from the first embodiment will be described, and description of common parts will be omitted.
As shown in FIG. 6 and FIG. 7, the main fitting 1A of the second embodiment is configured such that the second holding member 1A of the first holding member 10 described in the first embodiment projects to the opposite side to the projecting direction of the first bolt shaft 14. The difference is that the bolt shaft 15 is provided, a screw 15a is engraved on the tip end side thereof, and the tightening nut 32 is screwed on, so that the steel material C is attached to the second bolt shaft 15. In addition, specifically, the second bolt shaft 15 inserts both screw bolts having screws at both ends into the through holes 16 provided in the substrate 11, so that the peripheral edge of the through holes 16 and the body portion of the both screw bolts are inserted. It is welded and configured integrally with the first bolt shaft 14.

In the same manner as in the first embodiment, after the suspension bolt A is clamped in the main fitting 1A of the second embodiment, the tightening nut 32 is temporarily removed, and the through hole C1 of the steel material C is externally inserted into the second bolt shaft 15 to form the steel material. C is pressed against the back surface of the first substrate 11 of the first holding member 10 and is tightened and fixed by the tightening nut 32.

In the second embodiment, by providing the second bolt shaft 15 exclusively for mounting the steel material C, the mounting position of the metal fitting 1A can be changed by loosening the pressing nut 30 even after the steel material C is mounted. It is also possible to cope with a change in work procedure in which the metal fitting 1A is temporarily fixed to the steel material C in advance and then the metal fitting 1A is attached to the suspension bolt A.
Further, if the first bolt shaft 14 and the second bolt shaft 15 are used, it is possible to realize a variety of working methods such as being able to support two steel materials per one location of the metal fitting.

(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, only parts different from the second embodiment will be described, and description of common parts will be omitted.
As shown in FIGS. 8 to 11, reference numeral 100 denotes a first holding member, which is formed by bending a thin steel plate to form a substantially U-shape including a first substrate 110, a first upper plate 120a, and a first lower plate 120b. The first upper side plate 120a and the first lower side plate 120b are coaxially provided with a substantially semicircular first upper side holding recess 130a and a first lower side holding recess 130b which are held from the outer peripheral side of the hanging bolt A. Set up. Further, an upper hinge elongated hole 181a and a lower hinge elongated hole 181b forming the hinge portion 180 are provided near one side of the first upper sandwiching recess 130a and the first lower sandwiching recess 130b, respectively. Reference numeral 140 denotes a first bolt shaft vertically provided on the first substrate 110 of the first holding member 100, and reference numeral 150 denotes a second bolt shaft projecting from the first substrate 11 in a direction opposite to the projecting direction of the first bolt shaft 140. is there. In both of them, a screw is engraved on the tip side, and a tightening nut 320 is screwed on the second bolt shaft 150.

Reference numeral 200 denotes a second holding member, and the second substrate 210 is formed by bending a thin steel plate by press work so that the height of the first holding member 100 fits between the first upper plate 120a and the first lower plate 120b. And a second upper side plate 220a and a second lower side plate 220b form a substantially U-shape. The second upper side plate 220a and the second lower side plate 220b are coaxially provided with a semicircular second upper side holding concave portion 230a and a second lower side holding concave portion 230b which are held from the outer peripheral side of the suspension bolt A, respectively. .. In addition, the projection claws 131a, 131b, 231a, 231b are provided on the respective peripheral edges of the first upper sandwiching recess 130a, the first lower sandwiching recess 130b, the second upper sandwiching recess 230a, and the second lower sandwiching recess 230b. It is provided. By providing these protruding claws, they are hooked in the thread groove of the suspension bolt A and the holding force is improved.
The upper protrusion piece 250a and the lower protrusion piece 250b that form the hinge portion 180 are provided on the second holding member 200. The upper protrusion piece 250a and the lower protrusion piece 250b are provided by partially deforming the second upper plate 220a and the second lower plate 220b under pressure. The upper projection piece 250a and the lower projection piece 250b are respectively provided in the upper hinge long hole 181a provided in the first upper plate 120a of the first holding member 100 and the lower hinge long hole 181b provided in the first lower plate 120b. It is fitted loosely. The upper protrusion 250a and the upper hinge elongated hole 181a, and the lower protrusion 250b and the lower hinge elongated hole 181b form a hinge portion 180. Reference numeral 240 is an elongated hole provided in the second substrate 210 of the second holding member 200, and the first bolt shaft 140 of the first holding member 100 is inserted therethrough.

With respect to the end portion of the long hole 240, that is, the hinge portion 180, a first upper holding recess 130a for holding the hanging bolt A, a second upper holding recess 230a, a first lower holding recess 130b, and a second lower holding recess 130a. A first grip portion 170 and a second grip portion 270 are provided on the side opposite to the side-holding concave portion 230b.

A state in which the main fitting 1B of the third embodiment is attached to the suspension bolt A will be described with reference to FIG. The details are the same as in FIG. 4 of the first embodiment, and a brief description will be given here.
The opening sides of the first holding member 100 and the second holding member 200 of the metal fitting 1B are opposed to each other, the first bolt shaft 140 is inserted into the long hole 240, and the projecting pieces 250a and 250b of the second holding member 200 are first inserted. The first holding member 100 and the second holding member 200 are connected to each other by fitting into the hinge long holes 181a and 181b of the holding member 100, and the pressing nut 300 is screwed together with the washer 330 to the screw of the first bolt shaft 140. To do. In this way, the metal fitting 1B is assembled.

When attaching the metal fitting 1B to the hanging bolt A, as shown in FIG. 11, the first grip portion 170 and the second grip portion 270 are gripped with one hand in a state where the pressing nut 300 is loosened, and the grip portions of each other are gripped. 170, 270 move toward each other. By this operation, with the hinge portion 180 as a pivot, the first pinching recess 130 of the first pinching member 100 and the second pinching recess 230 of the second pinching member 200 are separated from each other to create a gap into which the suspension bolt A can be inserted. In this state, the suspension bolt A is inserted between the first holding recess 130 and the second holding recess 230, and then the pressing nut 300 is tightened. By this work, the metal fitting 1B can be fixed to the hanging bolt A.

Here, although the hinge portion 180 has a form in which the through hole and the projecting piece are combined, the through holes that are coaxial are provided on the upper and lower side plates of the first holding piece and the second holding member, and the rivet shaft is inserted through these through holes. Alternatively, it can be fixed by crimping. (Not shown)
Further, the holding recesses 130 and 230 have a semicircular shape for holding the side surface of the hanging bolt A, but like the first embodiment, the holding recesses 130 and 230 have a substantially V-shape, a substantially U-shape, or a substantially L-shape. But good.

Next, a method of using the third embodiment will be described in detail with reference to FIG.
When attaching the metal fitting to one of the suspension bolts A and B for passing the steel material C made of an angle material to an arbitrary position of the suspension bolt A, first, the pressing nut 300 is appropriately loosened, and the gripping portions 170 of the holding members 100 and 200 are grasped. , 270 by gripping with a finger and moving in the approaching direction, the hinge portion 180 is pivoted about the first holding recess 130 of the first holding member 100 and the second holding recess 230 of the second holding member 200 so as to be suspended. A gap through which the bolt A passes is created. The metal fitting 1B is inserted through the gap, and the fingers are removed from the grip portions 170 and 270 of the two holding members 100 and 200. The first holding recesses 130, 130 provided on the upper and lower side plates 120, 120 of the first holding member 100 and the first holding recesses 230, 230 provided on the upper and lower side plates 220, 220 of the second holding member 200 are used. It is possible to fix the suspension bolt A at an arbitrary position by holding the side surface of the suspension bolt A and tightening the pressing nut 300 screwed to the first bolt shaft 140. Similarly, the metal fitting 1B is attached to the other suspension bolt B at the same position as the suspension bolt A.
Next, the tightening nuts 320, 320 of the metal fittings attached to the hanging bolts A, B were once removed, and the steel material C made of the angle material C was provided on the steel material C on the second bolt shafts 150, 150 of the metal fitting 1B. The through hole C1 is externally inserted and fixed by tightening the tightening nuts 320 and 320.
Then, the pipe D is placed on the steel material C and fixed by the U bolt E.

In the third embodiment, the grip portions 170 and 270 of both the sandwiching members 100 and 200 are grasped by fingers and moved in the approaching direction, so that the hinge portion 180 serves as the pivot axis and the first sandwiching concave portion 130 and the first sandwiching concave portion 130 of the first sandwiching member 100. It is possible to easily separate the second holding concave portion 230 of the second holding member 200 from each other and open the opening slightly larger than the outer diameter of the hanging bolt with one hand, thereby improving the work efficiency.

In the third embodiment, the gripping portions 170, 270 of the two holding members 100, 200 are moved in a direction in which the gripping portions 170, 270 are gripped with fingers, and thus the first holding recess 130 and the second holding recess 230 are separated from each other. However, a spring or the like may be provided so that when the finger is released, the first holding recess 130 and the second holding recess 230 are forced to approach each other.

Further, another usage state of the metal fitting of the third embodiment is shown in FIG.
As shown in FIG. 13, the steel material C may be fastened to the first bolt shaft 140 with the fastening nut 310. If this configuration is adopted as in the third embodiment, it is possible to support two steel materials per one metal fitting.

DESCRIPTION OF SYMBOLS 1 Steel material mounting bracket for hanging bolts 1A Metal fitting 1B Metal fitting 10 First clamping member 11 First substrate 12a First upper plate 12b First lower plate 13a First upper clamping recess 13b First lower clamping recess 14 First bolt shaft 14a screw 15 second bolt shaft 16 through hole 20 second holding member 21 second substrate 22a second upper plate 22b second lower plate 23a second upper holding recess 23b second lower holding recess 24 long hole 30 pressing nut 31 Tightening nut 32 Tightening nut 100 First clamping member 110 First substrate 120 First upper and lower side plate 120a First upper side plate 120b First lower side plate 130 First clamping recess 130a First upper side clamping recess 131a Projecting claw 130b First lower side Side-holding concave portion 131b Protrusion claw 140 First bolt shaft 140a Screw 150 Second bolt shaft 160 Through hole 170 First grip portion 180 Hinge portion 181 Hinge elongated hole 181a Upper hinge elongated hole 181b Lower hinge elongated hole 200 2 clamping member 210 second substrate 220 second upper and lower side plate 220a second upper side plate 220b second lower side plate 230 second clamping recess 230a second upper clamping recess 230b second lower clamping recess 240 long hole 250 projecting piece 250a Upper protrusion 250b Lower protrusion 270 Second grip 300 Pressure nut 310 Tightening nut 320 Tightening nut 330 Washer A Hanging bolt B Hanging bolt C Steel material C1 Through hole D Piping EU bolt

Claims (3)

A steel material mounting fitting for a hanging bolt, which is fixedly attached to a pair of holding members for holding a steel material for mounting a pipe on a hanging bolt suspended on a floor slab or the like from the outside in the circumferential direction of the hanging bolt, wherein the pair of holding members are Both are formed by bending a thin steel plate into a substantially U shape composed of a substrate and upper and lower side plates, and the upper and lower side plates are formed with a holding recess for abutting and holding the one side of the suspension bolt, respectively. A first bolt shaft is fixed to the substrate to form a first holding member, and a through hole through which the first bolt shaft of the first holding member is inserted is formed in the other substrate to form a second holding member. The first bolt shaft of the first holding member is inserted into the through hole of the second holding member, and a pressing nut that can be advanced and retracted by screwing the first bolt shaft of the first holding member into the first bolt shaft of the first holding member. A steel mounting bracket for a hanging bolt, wherein the hanging bolt can be held by being screwed into the holding recess of the first holding member and the holding recess of the second holding member. A second bolt shaft projecting to the opposite side to the projecting direction of the first bolt shaft is fixed to the base plate of the first holding piece, and a tightening nut that is screwed into the second bolt shaft and is movable back and forth is provided. The steel material mounting bracket for a suspension bolt according to claim 1, characterized in that. By connecting the upper side plates of the first holding member and the second holding member, and the lower side plates of the first holding member and the second holding member with a hinge part, the hinge part is used as a pivot. The steel material mounting bracket for a hanging bolt according to claim 1 or 2, wherein the first holding member and the second holding member are openable and closable in a direction for holding or not holding the hanging bolt.

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