JP3101257U - Joist bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joist receiving member for securely fixing the joist material to the joist receiving member and hardly causing a change in the floor surface even when the joist material expands or contracts due to drying or the like.
SOLUTION: A joist receiving bracket 14 attached to an upper end portion of a steel supporting member 10 erected and fixed on a concrete foundation C and receiving and supporting a horn-shaped joist N from below. A threaded hole for screwing the upper end of the support member 10 is formed at the center of the bottom surface of the joist receiving member 14 formed in a bent shape, and a nail hole 14a for fixing the joist N by nailing on the side surface. And a U-shaped cut portion is formed on both sides of the bottom of the bottom surface for receiving the joist material N with a threaded hole formed in the bottom surface, and the end of the U-shaped cut portion is bent upward. A spring was formed.
[Selection diagram] FIG.

Description

  The present invention relates to a joist receiving bracket which is attached to an upper end of a steel supporting member which is erected and fixed to a foundation, and which receives and supports a square joist from below.

Generally, in order to form a floor of a building, first, a bundle is placed vertically on a slab, a large bar is provided at the upper end of the bundle, and a joist is arranged perpendicular to the large bar. . A floorboard is laid on the joist to form a floor.
Normally, since the joist is long, if the supporting points are limited to both ends, the central portion may bend, and the floorboard laid thereon may also be bent because of the heavy weight. Therefore, a supporting member is interposed between the lower surface of the joist and the concrete foundation under the floor to prevent the joist from bending.

The support member 10 is generally composed of an anchor bolt 12 and a joist receiving member 14 as shown in FIG. It is supported and fixed by a support fitting arranged on the surface of the foundation C. A joist receiving member 14 is attached to an upper portion of the anchor bolt 12.
The joist receiving member 14 is formed by bending a metal plate such as stainless steel into a U-shape, and having a threaded hole 14Ba into which the anchor bolt 12 is screwed in a bottom surface 14B. The joist receiving member 14 is screwed about 20 mm from the upper end portion of the anchor bolt 12 so that the joist material N is placed thereon. The material N is fixed.
In this case, if the lower surface of the joist N is flat, the distal end of the anchor bolt 12 will collide. Therefore, a round hole for avoiding the distal end of the anchor bolt 12 should be provided in advance on the lower surface of the joist N. Alternatively, a groove Na extending in the longitudinal direction is provided.

  In addition to the above, there is also a support member 10 in which a joist receiving member 14 is welded and fixed to a tip portion of an anchor bolt 12, and in this case, a round hole or a groove is formed on a lower surface of the joist material N. There is no need to provide it. In any case, a nail is driven from a nail hole 14Aa provided in the side surface 14A of the joist receiving member 14 so that the positional displacement between the joist material N and the joist receiving member 14 does not occur.

  By the way, in the case of the above-mentioned structure, when shrinkage occurs due to a change in climate or drying of the joist material with the passage of time, a gap is generated between the lower surface of the joist material N and the bottom surface 14B of the joist receiving member 14. Therefore, the nail driven into the side of the joist N is bent by the weight of the floor material or the joist N, and the nail is bent downward as a whole. For this reason, floor noise may occur or the floor may be inclined.

  Therefore, various proposals have been made. For example, Patent Literature 1 discloses a method in which an adhesive is applied to a surface of a joist receiving bracket (referred to as a receiving portion 3a in the literature) for receiving the joist material, and the surface is adhered and fixed.

  According to this method, it is said that the injection of the adhesive allows the joist receiving member and the joist material to be fixed to each other, and that the joist material does not become out of order due to shrinkage due to drying or the like.

JP-A-08-135070 (full text of the specification)

  The above-described method of applying an adhesive to the upper surface of a joist receiving bracket requires a large number of joists to be used, which complicates the operation and increases the cost of the adhesive. In addition, since the joists are fixed by the adhesive, the floor surface may be lowered by that amount when the joists shrink due to drying.

  The present invention has been made in view of the above-described circumstances, and its purpose is to securely fix a joist to a joist receiving bracket and change the floor surface even when the joist is stretched due to drying or the like. It is an object of the present invention to provide a joist receiving bracket which is less likely to cause the problem.

The present invention takes the following technical measures to achieve the above object.
That is, the invention according to claim 1 is a metal fitting which is attached to the upper end of a steel supporting member erected and fixed to a foundation base and receives and supports a horn-shaped joist from below. It has a threaded hole at the center of the bottom surface with which the upper end of the support member is screwed, and has a nail hole on the side to fix the joist by nailing, and It is characterized in that an elastic mechanism is provided on the upper part of the receiving bottom.

  The invention according to claim 2 is characterized in that in the joist receiving device according to claim 1, the elastic mechanism is a leaf spring disposed on both sides of a threaded hole in the bottom surface of the receiving device.

  According to a third aspect of the present invention, in the joist receiving device according to the first or second aspect, the elastic mechanism is provided with a U-shaped cut portion on both sides of a screw hole on the bottom surface of the receiving device. It is characterized by being formed by bending the end of the portion upward.

  According to the present invention, since the joist receiving surface of the joist receiving member is provided with the elastic mechanism, even if the joist is expanded or contracted due to climate change, the joist is securely supported and fixed by the spring effect.

Hereinafter, an embodiment of a joist receiving bracket according to the present invention will be described with reference to the drawings. The same or corresponding members as those described in the section of the background art are denoted by the same reference numerals.
1A and 1B are views showing a joist receiving bracket according to the present invention, wherein FIG. 1A is a front view, FIG. 1B is a plan view, FIG. 1C is a side view, and FIG. 1D is a perspective view.
In FIG. 1, the joist receiving member 14 is bent in a U-shape, and a threaded hole 14Ba is provided in the center of the bottom surface 14B. Further, a nail hole 14Aa for nailing and fixing the joist N is formed in the side surface 14A. The nail hole 14Aa is cut into a U-shape on both sides with the screw hole 14Ba therebetween, and the end is directed upward. A bent leaf spring 14Bb is formed.

  FIG. 2 is a perspective view showing a state in which the joist receiving member 14 according to the present invention is attached to the anchor bolt 12, and the construction method is as follows. The anchor 12 is erected and fixed (see FIG. 4), and the nut 16 is screwed from the upper portion of the anchor bolt 12 to a predetermined position (about 20 mm). Further, the joist receiving member 14 is screwed from the upper portion of the anchor bolt 12 to a predetermined position, and is fastened and fixed to the nut 16 previously screwed into the anchor bolt 12.

Next, how to attach the joist receiving member 14 and the joist material N according to the present embodiment will be described with reference to FIG. 3A and 3B show a state in which the joist N is attached to the joist receiving member 14, FIG. 3A is a perspective view, and FIG. 3B is a front view.
First, in order to prevent the tip of the anchor bolt 12 from hitting the joist N, a groove Na is previously provided in the lower surface of the joist N in the longitudinal direction. Next, the joist material N is fitted onto the joist receiving member 14. Here, since the joist N can be slid in the longitudinal direction using the longitudinal groove Na on the lower surface of the joist N provided in advance, the position adjustment of the joist N can be easily performed.

  As described above, since the position of the joist N can be adjusted, a wood screw is attached at a predetermined position to the upper surface of the joist N in advance at a predetermined depth, and the wood screw is aligned with the joint of the floorboard. It is possible to adjust to a position where In addition, if the wood screws are not at the predetermined position, the floor board is bent in a state where the floor board is stretched, but such a state can be prevented.

  Next, a method of positioning and fixing the joist N to the joist fixing bracket 14 will be described. First, the joist N is set at the previously positioned joist fixing bracket 14, and the set joist N and the joist receiving bracket are set. The jig 20 shown in FIG. 5 is inserted from the direction perpendicular to the joist N so as to sandwich the jig 14. The jig 20 is bent in a U-shape. A slit 20Ba having a width through which the nut 16 screwed to the anchor bolt 10 can pass is provided on the bottom surface 20B. Abuts on the bottom surface 14B. A bur or the like is inserted into a gap between the jig 20 and the joist N, and the joist N is pushed down in the direction of the leaf spring 14Bb by leverage, whereby the spring function is exerted on the leaf spring 14Bb. Then, while maintaining this state, a wooden screw is attached from the nail hole 14Aa provided on the side surface of the joist bracket 14 to fix the joist N and the joist bracket 14.

  Due to the spring function of the above-described leaf spring 14Bb, even when the joist N is expanded or contracted or warped due to a change in climate, the joist N is securely supported and fixed, and floor noise due to bending may occur. In addition, there is no possibility that the floor is inclined.

  In addition, since the position of the joist N is easily adjusted by providing the longitudinal groove on the lower surface of the joist N, the hole corresponding to the position of the anchor bolt needs to be formed in the joist N in advance. And work efficiency can be greatly improved.

  The joist receiving bracket according to the present invention can reliably support and fix the joist even if the joist expands or contracts due to climate change, and is therefore suitable for floor construction in areas with severe climate change. It can be used effectively.

3A and 3B are views showing a joist receiving bracket according to the present invention, wherein FIG. 3A is a front view, FIG. 3B is a plan view, FIG. 3C is a side view, and FIG. It is a perspective view showing the state where the joist receiving fixture concerning the present invention was attached to the anchor bolt. It is a figure which shows the joint state of the joist receiving bracket and joist material concerning this invention, (a) is a perspective view, (b) is a front view. It is the figure which showed the implementation state of the conventional joist receiving bracket. FIG. 4 is a view showing a jig used for implementing the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Support member 12 Anchor bolt 14 Joist receiving bracket 14A Side surface 14Aa Nail hole 14B Bottom surface 14Ba Screw hole 14Bb Leaf spring 20 Jig

Claims (3)

  A joist receiving bracket that is attached to the upper end of a steel supporting member that is erected and fixed to a foundation base and that receives and supports a horn-shaped joist from below. A threaded hole into which the upper end of the support member is screwed, a nail hole for fixing the joist on the side by nailing, and an elastic mechanism on the upper bottom surface for receiving the joist. A joist receiving bracket characterized in that:   2. The joist receiving bracket according to claim 1, wherein the elastic mechanism is a leaf spring disposed on both sides of a threaded hole on a bottom surface of the receiving bracket. 3.   2. The elastic mechanism according to claim 1, wherein a U-shaped cut portion is provided on both sides of the bottom surface of the receiving member with a screw cut hole therebetween, and an end of the cut portion is bent upward. The joist receiving bracket according to 2.

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