JPH0849346A - Device for mounting back nut - Google Patents

Abstract

PURPOSE:To make it possible to mount a back nut, which is to be mounted to the rear side of a beam, easily and in a short time and hold the nut securely as well. CONSTITUTION:A mounting piece formed on the upper end of a hardware main body 25 is fixed with a through bolt 1 which is mounted across upper and lower flanges 22 of a beam 5. The hardware main body 25 is mounted to the beam 5, thereby adapting a back nut 19 of the hardware main body 25 with a bolt hole 27 of the beam 5. In addition, an elastic tongue piece installed to the hardware main body 25 is placed in contact with the through bolt 1 so that the hardware main body 25 may be pressed toward a web 26 of the beam 5 with an elastic force of the elastic tongue piece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used for joining a side wall of a beam made of H-section steel or channel steel to an end of the beam in a direction perpendicular to the beam. The present invention relates to a back nut mounting device that is provided in advance so as to conform to.

[0002]

2. Description of the Related Art Generally, when joining a member with a bolt and a nut, if it is difficult to attach the nut to the back side of the bolt hole, the nut is fitted to the bolt hole in advance and attached. . As a method of attaching such a nut, conventionally, there are a method of fixing by welding and a method of attaching with a metal fitting.

[0003]

In the above-mentioned conventional mounting structure, in the case of fixing by welding, not only the welding itself is a labor-intensive work, but also the welding needs to be performed while moving to each part of the long beam. Therefore, there is an inconvenience that the working time becomes long.

On the other hand, in the case of using metal fittings, a special structure for mounting the metal fittings is required, and also work for mounting the metal fittings is required. In particular, at the beam-to-beam joints, columns and shafts are fixed to the beams. There are two types of attachments, bolts for fixing the shafts and back nut fittings. It has the drawback of requiring work.

The present invention solves the above drawbacks of the prior art, allows a back nut to be attached to the side surface of a beam or the like to be easily attached in a short time, and positions the nut with a bolt hole of the beam or the like. The purpose is to ensure that the above can be carried out.

[0006]

In order to solve the above problems, according to the present invention, there is provided a metal fitting for attaching a back nut to the side surface of an H-shaped or grooved steel material, which is installed along the side surface of the web. The upper end of the metal fitting body made of an elastic plate is bent horizontally to form a mounting piece, and the tip of a through bolt mounted across the upper and lower flanges of the steel material penetrates through this mounting piece and It is fixed to the lower surface of the upper flange with a screwed nut, and the tip of an elastic tongue formed by cutting and raising the metal fitting body comes into contact with the through bolt, and the elasticity of the tongue presses the metal fitting body to the web side. It is characterized by being done.

In the above, the annular projection formed around the screw hole of the back nut is inserted into the bolt hole of the metal fitting body, and the tip of the projection is expanded diametrically outward and held so as not to come off from the bolt hole. It is possible. At that time, it is conceivable that the bolt hole is elongated in the longitudinal direction and the back nut is movable along the elongated hole.

[0008]

The bolt mounted over the flanges of the beam or the like can be used for mounting a shaft assembly or the like on the beam, and the metal fitting can be mounted simultaneously with the mounting of the bolt. Further, since the metal fitting body is always pressed by the elastic tongue toward the side surface of the beam, the back nut attached to the metal fitting body can be surely positioned. Further, since the metal fitting is supported by the upper flange of the beam in a suspended state, the same metal fitting can be used regardless of the vertical dimension of the beam. At this time, if the back nut is movable in the vertical direction as described above, it is possible to cope with the difference in the positions of the bolt holes.

[0009]

1 is a perspective view of a metal fitting of the present invention, and FIG.
The attached state is shown. In the figure, (1) is a through bolt for fixing the shaft assembly (2), and as shown in FIG. 4, a male screw portion (3) is formed at the upper end thereof. Further, a tapered tip portion (4) for facilitating insertion into a bolt hole is integrally formed at the tip portion of the male screw portion (3). A nut (6) for fixing the beam (5) made of H-shaped steel is screwed onto the male screw portion (3). On the other hand, one end of a long nut (8) is screwed into the male screw portion (7) formed at the lower end of the through bolt (1), and the screw hole ( An annular protrusion (10) is integrally formed around the periphery of (9).

As shown in FIG. 5 and subsequent figures, the frame assembly (2) has a structure in which a horizontal frame (12) consisting of C channels and a vertical frame (13) are joined in a rectangular frame shape. ) End of the above beam (5)
Bolt holes (15) that match the bolt holes (14) of Fig. 2 are formed (Fig. 2).

(17) is a beam (5) to which the through bolt (1) is attached, and an end portion of the beam (18) in a direction perpendicular to the beam (5).
The fitting of this invention for attaching the back nut (19) to the side surface of the beam (5) for joining to the side surface of the beam is shown. This metal fitting
(17) is made of a thin metal plate having elasticity, the upper end of which is bent horizontally to form a mounting piece (21).
In (1), bolt holes (24) and (24) are formed in conformity with the bolt holes (14) and (14) formed in the flange (22) on the upper part of the beam (5). Further, in the vertical metal fitting body (25), bolt holes (27) (27) ... of the web (26) of the beam (5) are formed in a vertically elongated slot hole shape (28). (28) ... is formed. As shown in FIG. 3, the back nut (19) has an annular protrusion (30) formed on the back surface thereof along the periphery of the screw hole (29) of the nut (19). It is inserted into the slotted bolt hole (28) so as to be vertically movable, and the protrusion (30) is also formed.
The tip of the is expanded to the outside in the diameter direction and held so as not to come off.

Further, in an approximately middle portion in the vertical direction of the metal fitting body (25), both ends of the metal fitting body (25) in the left and right direction are slanted to the same side as the back nut (19) through L-shaped notches. Elastic tongues (32) (32) cut and raised are formed. Further, on both upper and lower sides of the tongue piece (32), both end portions in the left-right direction of the metal fitting body (25) are bent at right angles to the surface side to which the nut (19) is attached to form a rotation stop piece (31). This stopper (3
The side surface of the nut (19) abuts against 1) and holds the nut (19) so as not to rotate.

In the above structure, first, the back nut mounting metal fitting (17) is made so that the metal fitting body (25) is on the web (26) side, and the mounting piece (21) at the upper end is attached to the beam (5). ) Abutting on the lower surface of the flange (22) on the upper side of the flange (22) to match the bolt hole (24) with the bolt hole (14) of the flange (22), and the upper end of the through bolt (1) to these bolt holes (14). 14) After inserting into the (24), the protrusion (10) at the tip of the long nut (8) at the lower end is also inserted into the bolt hole (23) of the lower flange (22). In this state, rotate the fixing nut (6) screwed into the male screw part (3) at the upper end of the through bolt (1) to rotate the back nut mounting bracket.
The mounting piece (21) of (17) is fastened and fixed to the upper flange (22). At that time, the back nut (19) is moved in the vertical direction so as to match the bolt hole (27) of the web (26). At this time, the tip of the elastic tongue (32) cut and raised from the metal fitting body (25) contacts the side surface of the through bolt (1), and the tongue (3
The metal body (25) is pressed toward the web (26) by the elastic force of (2), and the back nut (19) is pressed against the web (26) by this, holding it so that it does not move from the position where it was positioned. There is.

On the lower flange (22) side, the upper horizontal frame (12) of the lower shaft assembly (2) is attached to the lower surface of the flange (22).
The bolt (33) inserted into the bolt hole (15) of the lateral frame (12) from below, and penetrates the bolt hole (23) of the flange (22) into which the annular protrusion (10) is inserted. Then, the horizontal frame (12) is fixed by screwing it into the long nut (8) and tightening it. At this time, the rotation stopping piece (20) protruding from the side surface of the long nut (8) comes into contact with the web (26) or the metal fitting (17) to prevent the rotation together. On the other hand, the male screw part (7) protruding upward from the flange (22) on the upper side is a bolt hole of the lower horizontal frame (12) in the frame assembly (2) installed on the upper part of the beam (5).
Insert it through (15), tighten the nut (34) screwed to the tip, and fix the shaft assembly (2) on the upper side.

After mounting the metal fittings (17) as described above, the bolts (36) inserted into the end plates (35) at the ends of the beams (18) shown in FIG. This beam (18) is joined by being screwed in and attached.

[0016]

As described above, according to the present invention, the metal fitting for holding the back nut is fixed by the through bolt attached to the beam or the like. Since it can be used for fixing, there is no need for a special bolt to attach the metal fitting, and since the metal fitting is attached at the same time as the mounting of the bolt, compared to conventional welding, of course Reduces the man-hours and installation time.

In addition, since the elastic tongue of the metal fitting body abuts against the through bolt by the elastic tongue piece, the back nut is securely pressed against the web side of the beam, so that the back nut can be reliably positioned without leaving the bolt hole of the web. There is.

In addition, since the metal fitting is attached to the upper flange of the beam in a suspended state, the same metal fitting can be used even when the vertical dimension of the beam is different.

At this time, according to the invention of claim 3 of this application,
Since the back nut is movable up and down within the range of the long hole, by moving according to the difference in the position of the bolt hole of the beam, the same metal fitting is used even if the position of the bolt hole is different. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a perspective view of a metal fitting of the present invention.

FIG. 2 is a vertical cross-sectional view showing how the metal fitting is attached to the beam.

FIG. 3 is a longitudinal sectional view showing a back nut mounting portion in an enlarged manner.

FIG. 4 is a perspective view of a through bolt.

FIG. 5 is an exploded perspective view of a mounting portion of a metal fitting.

FIG. 6 is a perspective view of the same attachment state.

[Explanation of symbols]

 (1) Through bolt (2) Frame assembly (3) Male thread (5) Beam (6) Fixing nut (17) Fixing bracket (18) Beam (19) Back nut (21) Mounting piece (22) Flange (24 ) Bolt hole (25) Bracket body (26) Web (27) Bolt hole (28) Bolt hole (29) Screw hole (30) Annular protrusion (32) Elastic tongue

Claims (3)

[Claims] 1. A metal fitting for attaching a back nut to a web side surface of an H-shaped or grooved steel material, wherein an upper end of a metal fitting body made of an elastic plate installed along the side surface of the web is bent in a horizontal direction for attachment. The tip of a through bolt that is made into a piece and is attached across the upper and lower flanges of the steel material penetrates through this attachment piece, and is fixed to the lower surface of the upper flange with a nut screwed to the through bolt, and A back nut fixing device, characterized in that the tip of an elastic tongue formed by cutting and raising the metal fitting body is brought into contact with the through bolt to press the metal fitting body toward the web side by the elasticity of the tongue. 2. The annular projection formed around the screw hole of the back nut is inserted into the bolt hole of the metal fitting body, and the tip of the projection is expanded outward in diameter to hold it so as not to come off from the bolt hole. The mounting device for the back nut according to claim 1, wherein 3. The back nut mounting device according to claim 2, wherein the bolt hole is a long hole, and the back nut is movable along the long hole.