JP2000248636A - Embedding fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an embedding fitting capable of making the connection of a plate and a long nut firm and completely eliminating welding working to connect the plate and the long nut in the embedding fitting embedded in a concrete panel composed by connecting the long nut to the plate. SOLUTION: An embedding fitting is embedded in a concrete panel or the like by the combination of a plate 5 having a hole 6 capable of inserting a long nut 1 and the edge part of the long nut 1. A flange part 3 is provided on the root part of the long nut 1, a plurality of caulking projections 4 are projected along the outer peripheral face of the long nut 1 from the erection planar part 3a of the flange part 3, a notched groove 7 capable of inserting the caulking projection 4 on the periphery of the hole 6 of the plate 5 is provided, and the edge side of the caulking projection 4 of the long nut 1 inserted in the hole 6 and the notched groove 7 is caulked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embedding metal fitting to be embedded in a concrete panel such as a lightweight cellular concrete panel or a precast concrete panel, and more particularly to a caulking type embedding wherein a long nut is attached to a plate by caulking. It is about metal fittings.

[0002]

2. Description of the Related Art Conventionally, a concrete panel (hereinafter simply referred to as a concrete panel) such as a lightweight cellular concrete panel (ALC board) or a precast concrete panel is generally attached to a reinforcing steel bar and a frame of a building or the like. Mounting brackets are embedded. Generally, a lattice-shaped reinforcing bar is used as the reinforcing bar.

As the mounting bracket, for example,
No. 9905 (first publicly known technique), Japanese Patent Publication No. 4-7709
No. 7 (second known technology), Japanese Patent Publication No. 4-77098 (third known technology), Japanese Patent No. 2605587,
(Fourth known technology), JP-A-10-72873 (fifth known technology), Japanese Utility Model Publication No. 1-2004 (sixth known technology), Japanese Utility Model Publication No. 1-22005 (7th known technology),
Japanese Utility Model Publication No. Hei 3-4487 (the eighth known technology), Japanese Utility Model Application Laid-Open No. 6
As shown in, for example, Japanese Patent Application No. 53110 (ninth known technology), various types are known.

[0004] Among these known techniques, the first to fifth known techniques and the ninth known technique are mounting brackets formed by welding a long nut to a plate, and an inlet of the long nut. This is a technique in which foam mortar or concrete is prevented from flowing into the inside of a long nut when manufacturing a concrete panel.

A sixth known technique is a technique for welding a mounting bracket consisting of a plate and a nut to a reinforcing bar, and a seventh known technique is a technique for inserting a bolt into a bolt insertion hole of a plate to assemble the mounting bracket. is there.

Further, an eighth known technique is that the reinforcing member can be constantly positioned at a regular position without displacing the set frame even if the mold side plate is moved and deformed by foaming expansion and hardening of the ALC mortar. This is a technique for positioning a set frame.

[0007] Commonly used mounting brackets include:
It has a structure comprising a plate joined to a reinforcing steel bar by welding or the like and a long nut fixed to the plate. The one with the mounting bracket attached to the reinforcing steel mentioned above,
A concrete panel is manufactured by previously disposing it in a formwork and injecting foamable mortar or concrete into it. When a concrete panel is mounted on a building, the concrete panel is mounted on the building by screwing a bolt on the building frame side into a long nut of a mounting bracket.

When a long nut is fixed to the plate of the mounting bracket having the above-described structure, a method of inserting the long nut into a hole formed in the plate and welding the edge of the hole is generally performed. ing. However, if the long nut is simply inserted into the hole of the plate and welded, the joining strength may be insufficient. The applicant of the present invention has invented a method of inserting a long nut into a hole, bending the tip of the long nut outward, caulking and welding, and has already filed a patent application (Japanese Patent Application No. 10-236670).

[0009]

However, the tip of the long nut inserted into the hole of the plate developed by the applicant as described above is crimped in the form of a skirt on the back surface of the plate, folded back, and further fixed by welding. This method eliminates the risk that the long nut will fall off the plate, but has the following problems.

That is, when the tip of the long nut is caulked in a skirt shape, the joining reliability is increased, but caulking is required, and there has been a problem that the machining process and the machining cost increase. Also, caulking alone does not play the role of an anchor nut because the nut rotates, so welding work is necessary in addition to caulking, and therefore, two different types of processing, caulking and welding, are required. However, there has been a problem that the processing cost is significantly increased.

When a concrete panel in which the embedded metal fitting is embedded is attached to a building frame, if a bolt is screwed into the long nut and an excessive torque is applied to tighten the bolt, an anchor is attached to the long nut. Since a pulling force acts, the portion of the long nut caulked in a skirt shape is plastically deformed, and the long nut may come off from the plate.

Further, when the rotation of the long nut is completely stopped with respect to the plate, there is a problem that the reliability of the joint strength is lacking only by welding. Therefore, in the event that the mounting bracket malfunctions the anchor nut, the concrete panel falls from the building, causing a serious problem.

The embedding metal fitting according to the present invention is a completely new technology developed in view of the above-mentioned many conventional problems,
In particular, a long nut having a flange portion fundamentally and having a plurality of caulking projections on an upright plane of the flange portion, and a plate having a hole through which the tip portion of the long nut and the caulking projection can be inserted are combined. Thus, the present invention provides an entirely new structure of the embedded metal fittings.

[0014]

The embedding fitting according to the present invention is a completely new invention developed in view of the above-mentioned conventional problems. A long nut having a crocodile portion at the root portion, and a plurality of caulking protrusions projecting from an upright plane of the crocodile portion; In an embedding metal fitting for a concrete panel comprising a combination of a plate having a hole having a shape, a tip end side of a caulking projection inserted into the hole of the plate is caulked, and the long nut is integrally formed around the hole of the plate. An embedding fitting characterized by being fixedly configured.

[0015] In the embedding metal fitting of the invention described above, the flange is provided at the root of the long nut. Therefore, even when the tip of the long nut is inserted into the hole of the plate, this flange allows the flange to be attached to one side of the plate. Nuts can be fixed. Therefore, unlike the invention of Japanese Patent Application No. 10-236670 filed by the present applicant, the entire circumference of the end of the long nut is folded back into a skirt ring shape, and the work of caulking can be completely eliminated.

In addition, a plurality of caulking projections are projected from an upright plane of a flange portion of the long nut of the embedding metal fitting, and a peripheral surface of the tip portion of the long nut and the caulking projection are inserted close to the plate. Since a hole having a predetermined shape to be obtained is provided, when the tip of the long nut and the caulking projection are inserted into the hole of the plate, the rotation of the long nut with respect to the plate by the locking action of the caulking projection is completely completed. Can be prevented.

By increasing the contact area between the inner peripheral edge of the hole of the plate and the peripheral surface of the long nut including the caulking projection, the connection between the long nut and the plate can be further strengthened. Therefore, even when the long nut is used as an anchor nut after being buried in a concrete panel or the like, there is no possibility that the long nut is separated from the plate and rotated.

In the embedding metal fitting having the above-described structure, the long nut can be connected and fixed to the plate by caulking the tip side of only the caulking projection inserted into the hole of the plate to increase the diameter outward. . Therefore, the embedded metal fitting of the first invention can completely eliminate the need for welding and fixing the long nut and the plate.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing one embodiment of an embedding fitting according to the present invention. FIG. 1 is a perspective view showing components of the embedding fitting according to the present invention. FIG. 3 is a plan view and a side view of the plate of FIG. 1, and FIG. 4 is an assembly explanatory diagram of the long nut and the plate of FIG.

5 (A) and 5 (B) are longitudinal sectional explanatory views of main parts of FIG. 4, respectively. FIG. 6 is a perspective view showing components of an embedding fitting showing another embodiment, and FIG. 6A and 6B are a plan view and a partially cutaway explanatory view showing a configuration of a long nut 6.

In FIGS. 1 to 5, reference numeral 1 denotes a long nut, and a screw 2 is formed in an inner peripheral surface of a tip portion (upper portion) 1a. Further, a flange portion 3 having a large diameter is provided at a root portion (lower end portion) of the long nut 1. Four caulking projections 4 are integrally erected along the outer peripheral surface of the long nut 1 on the erected flat portion 3 a of the flange portion 3.

Reference numeral 5 denotes a plate having a predetermined length, and a hole 6 for inserting the long nut 1 is formed substantially in the center of the plate 5. The hole 6 has such an inner diameter that the distal end 1a of the long nut 1 can be inserted, but the flange 3 cannot be inserted. At the edge of the hole 6, four cut grooves 7 through which the projections 4 of the long nut 1 can be inserted are formed.

In assembling the embedding fitting according to the present invention, as shown in FIGS. 4 and 5A and 5B, the distal end 1a of the long nut 1 is inserted into the hole 6 of the plate 5. By inserting the caulking projection 4 provided therearound and then caulking the front end (upper end) of the caulking projection 4 to increase the diameter, the plate 5 is pressed at this portion and together with the flange 3 from both sides. Long nut 1 holding plate 5
Can be attached and fixed to the plate 5.

In the embedding metal fitting of the present invention assembled as described above, the caulking projection 4 erected around the long nut 1 is fitted into the cut groove 7 of the hole 6 of the plate 5. Therefore, the rotation of the long nut 1 with respect to the plate 5 can be prevented.

Further, by fitting the caulking projection 4 into the cut groove 7, the contact area between the long nut 1 and the plate 5 can be increased, and the connection between the two can be stabilized.
Therefore, the long nut 1 does not rattle to the plate 5, and the long nut 1 and the plate 5 are connected to each other to complete the embedding metal fitting even if the welding work conventionally required is omitted at all. I can do it.

In the above-described embodiment, a small diameter caulking projection 4 is provided so as to extend from the upright plane 3a of the flange portion 3 of the long nut 1 to the outer peripheral surface of the long nut 1, as shown in FIGS. As described above, the four caulking projections 8 having a large diameter and projecting in a triangular cross section are integrally provided from the upright plane 3a of the flange portion 3 of the long nut 1 to the outer peripheral surface of the long nut 1, and this portion is formed as 4 It is also possible to configure a prismatic shape.

In the case of the embodiment shown in FIGS.
Since the upper portion of the upright plane 3a of the flange portion 3 forms a quadrangular prism by the caulking projections 8, the holes 9 formed in the plate 5 are formed in a quadrangular shape. As described above, forming the upper portion of the flange portion 3 in the shape of a quadrangular prism is simpler, easier to process, and more practical. This portion can be formed in a hexagonal shape in addition to a quadrangular prism shape.

The number of caulking protrusions 4 and 8 provided on the long nut 1 may be any number as long as it is plural. However, as a result of various experiments by the present inventors, two to six caulking protrusions 4 and 8 are found. For example, it has been found that the long nut 1 can be sufficiently engaged with the plate 5.

[0029]

Since the embedding fitting according to the present invention has the above-described structure and operation, it has the following great effects.

Since the flange portion is provided at the root portion of the long nut, when the distal end side of the long nut is inserted into the hole of the plate, the flange of the long nut is brought into contact with and engaged with one side of the plate. The long nut does not fall off the plate even when a large anchor pulling force is applied. In addition, this eliminates the need for the conventional work of folding and crimping the entire circumference of the end portion of the long nut.

A plurality of caulking protrusions are provided on the upright plane of the flange portion of the long nut, and the long nut is connected to the plate so that the caulking protrusion fits into a cut groove provided around the hole of the plate. Even when the bolts are tightened with an appropriate torque, the rotation of the long nut with respect to the plate can be completely prevented. In addition, by providing the caulking projection and the cut groove and making them contact each other, it is possible to increase the contact area between the long nut and the plate, thereby stabilizing the connection between the two.

By caulking the tip end of the caulking projection, the long nut can be easily connected to the plate. Therefore, the embedding metal fitting can be manufactured by simply connecting the long nut to the plate only by caulking without omitting the conventional welding operation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing components of an embedding metal fitting according to the present invention.

FIG. 2 is a plan view and a front view of the long nut of FIG. 1;

FIG. 3 is a plan view and a side view of the plate of FIG. 1;

FIG. 4 is an explanatory view for assembling a long nut and a plate in FIG. 1;

5 (A) and 5 (B) are explanatory longitudinal sectional views of main parts of FIG. 4, respectively.

FIG. 6 is a perspective view showing components of an embedding fitting showing another embodiment.

FIG. 7 is a plan view and a partially cutaway explanatory view showing the configuration of the long nut in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Long nut 1a Tip part 2 Screw 3 Flange part 3a Standing flat part of flange part 4 Caulking projection 5 Plate 6 hole 7 Notch groove 8 Caulking projection 9 hole

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Iwao Iwao 600-5 Matsuhidai, Matsudo-shi, Chiba F-term (reference) 2E125 AA66 AE02 AG60 BA02 BB02 BB19 BB24 BB29 BB33 BC09 BD01 BE07 BF04 BF08 CA03 CA19 2E162 CA11 CA13 4G058 GA04 GC01 GE01 GE07

Claims (1)

[Claims] 1. A long nut having a screw on the inner periphery of a tip portion, a crocodile portion at a root portion, and a plurality of caulking projections projecting from an upright plane of the crocodile portion, and crimping the tip portion of the long nut. In a concrete panel embedding fitting comprising a combination of a plate having a hole having a predetermined shape through which the peripheral surface of the projection can be inserted in close proximity, the tip of the caulking projection inserted through the hole of the plate is swaged. The embedding metal fitting, wherein the long nut is integrally fixed around a hole of the plate.