JPS5844165Y2 - Metal fittings for joining joists to beams - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention primarily relates to a metal fitting for joining together girders and joists that overlap in orthogonal positions of units in a modular building.

Conventionally, when joining a beam and a joist, a bolt or nut is used, the bolt is inserted through the flange of the beam and the flange of the joist, and then the nut is screwed onto the insertion bolt. However, inserting bolts and threading and tightening nuts into a large number of joists requires a lot of effort, and this reduces construction efficiency. This was one of the causes.

Furthermore, the nuts loosen due to vibrations, etc., causing floor rumbling (squeaking noise) that impairs comfortable living.

Furthermore, as a joining means that does not use bolts as described above, as shown in Japanese Utility Model Publication No. 57-60408, a coupling tool having elastic protrusions protruding from the inner surfaces of three opposing pieces of a clamping piece is used. A technique is also known in which the framework is joined by sandwiching it between the overlapping parts of parallel beams and purlins that overlap vertically, but this conventional technique cannot connect the overlapping parts of orthogonal beams and joists.

In view of these circumstances, the present invention allows for quick and easy joining of beams and joists that overlap in orthogonal positions, and
It is an object of the present invention to provide a joining metal fitting that maintains reliable joining strength that does not cause floor noise.

The metal fitting for joining a joist to a beam according to the present invention has a clamping piece that presses the flange of the beam from the bottom side, a clamping piece that presses the flange of the joist from the top side, and a clamping piece that connects both clamping pieces. It is composed of a member formed into a U-shape or almost a U-shape when viewed from the side by three opposing pieces and a web part, and further, the clamping piece that presses the flange part of the joist has the U-shape. or projecting outward in the left and right direction from the left and right side edges of the web portion of the substantially U-shaped member. On the other hand, the joists and beams can be joined by an extremely simple operation of driving this metal fitting against elastic resistance.

Therefore, the entire joining operation at multiple locations can be performed much more quickly and easily than in the conventional case.

In addition, in this joined state, since both flanges are elastically clamped, the joint strength between the joist and the beam can be maintained even when subjected to vibrations, and therefore the occurrence of floor noise can be reliably prevented.

As a result, the efficiency of the joining work can be greatly improved.

In addition, since this metal fitting is a single piece, it has the advantage that it is easier to handle and manage than separate bolts and nuts.

Hereinafter, embodiments of the present invention will be described based on the drawings.

The end of the steel frame joist 5 having a C-shaped cross section and whose opening 5B is located downward is brought into contact with the upper flange portion 4A of the steel beam 4 having a ■-shaped cross section in a perpendicular attitude, and the beam flange portion 4
The beam 4 and the joist 5 are fixedly joined using the joining fitting A in a state where the joist A and the joist flange portion 5A are superimposed.

The metal fitting A consists of a U-shaped or approximately U-shaped member 1 having three opposing pieces and a web portion 1C, and a three-sided U-shaped member 1 at the free end of its lower piece.
One clamping piece 1A is integrally installed at an angle of about 0°, and two square-shaped clamping pieces IB, IB are placed on both the left and right edges of the upper piece outward in the left-right direction from the position of the left and right edges of the web portion 1C. It consists of a structure in which each of these is connected in series.

Each clamping piece IA, IB, and 1B faces the inner space of the U-shaped member 1.

The width of the web portion 1C of the U-shaped member 1 on the left and right sides is slightly smaller than the width of the joist opening 5B.

A square-shaped backing material 2 is hung and held by the upper holding pieces IB, IB.

This packing material 2 faces the lower surfaces of IB and 1B when both the upper parts are held.

Reference numeral 3 denotes a packing material interposed between the abutment surface between the end of the joist 5 and the upper surface of the beam flange portion 4A.

First, both upper clamping pieces IB and IB are inserted into the opening 5B from below, and then the posture of the whole is changed by 90 degrees in each of the two dimensional directions, so that the posture of the metal fitting A is changed to the upper clamping piece 1B. be in a horizontal position along the longitudinal direction of the joist 5.

At this time, the lower holding piece 1A is located below the opening 5B.

In this state, when the metal fitting A is driven and moved to the beam flange portion 4A side, the lower clamping piece 1A is placed on the lower surface of the beam flange portion 5A, and the upper clamping pieces 1B, 1B, more specifically, the packing material 2 is placed in the joist opening 5B. It comes into elastic contact with the upper surfaces of both side joist flanges 5A, 5A, respectively.

That is, during driving, the lower clamping piece 1A and the upper clamping piece I
B and IB are forcibly expanded in a state that resists elasticity,
Due to the elastic restoring force exerted based on this, both the upper and lower flange portions 4A, 5A, 5A are clamped and fixed.

Since the metal fitting A is joined to the joist 5 through the packing material 2, there is no risk of it falling off unexpectedly even if vibrations are applied.

In addition, since the joist 5 and the beam 4 are sandwiched by the metal fittings A, and the packing material 3 is interposed between them, the joist 5
There is also no risk of unexpected relative displacement in the left, right, front and rear directions with respect to the beam 4.

The packing material 2 may be detachably attached to the metal fitting A, or may be integrated in advance.

In the case of this embodiment, the flange portion 4A or 5A, 5A,
There is no need to drill a bolt insertion hole as in the case of conventional bolts and nuts.

FIG. 4 shows another embodiment in which a protrusion 1a is integrally stamped out on the inner surface of the lower clamping piece IA, and a retaining part 4a for engaging the protrusion 1a with the beam flange 4A is inserted into a through hole ( It is formed as a concave groove (also a concave groove), which further strongly prevents relative displacement of the metal fitting A in the front, rear, left, and right directions.

FIG. 5 shows upper holding pieces IB, projections 1b, 1b on IB, and engaging parts 5a, 5a on joist flange parts 5A, 5A.
In this case, the protrusions 1b, lb penetrate the packing material 2 and protrude downward.

[Brief explanation of the drawing]

The drawings show an embodiment of the metal fitting for joining a joist to a beam according to the present invention, and FIG. 1 is a longitudinal side view of the joined state, FIG. 2 is a longitudinal rear view, FIG. 3 is a perspective view, and FIG. FIG. 5 is a vertical side view and a vertical front view of different embodiments, respectively. 1... U-shaped member, IA, IB...
Clamping piece, 1C... Web part, la, lb...
...Protrusion, 4...Beam, 4A...
Flange portion, 4 a, 5 a...Engaging portion, 5
...joist, 5A...flange part.

Claims (1)

[Claims for Utility Model Registration] ■ The flange portions 4A are substantially orthogonal to each other, and
, beam 4 arranged in a posture in which 5A are overlapped vertically
A clamping piece IA that is a joining metal fitting for fixing the beam 4 and the joist 5 and presses the flange portion 4A of the beam 4 from the lower surface side.
, clamping pieces IB, IB that press the flange portion 5A of the joist 5 from the upper surface side, and both clamping pieces IA, IB.
, 1 The three pieces facing each other so as to connect B and the web part IC
and a member 1 formed in a U-shape or almost a U-shape when viewed from the side, and further, the clamping pieces IB, IB that press the flange portion 5A of the joist 5 are formed in the U-shape or almost a U-shape. A metal fitting for joining a joist to a beam, characterized in that it projects outward in the left-right direction beyond the left and right side edges of the web portion 1C of the U-shaped member 1. ■ A clamping piece I that presses each of the flange portions 4A and 5A.
Of A and IB, one of the clamping pieces 1A or 1B has a protrusion 1a or 1b that elastically engages with a positioning retaining part 4a or 5a formed on the flange part 4A or 5A on the side to be pressed. A metal fitting for joining a joist to a beam as described in item (2) of the utility model registration claims.