JP3537093B2 - Steel bar joining equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining device for joining a plate-shaped member through which a steel bar having a circular cross section is inserted and the steel bar with a nut.

[0002]

2. Description of the Related Art For example, when assembling a bar made of steel bars in a bird cage shape, a technique of fastening an intersection between a main bar in the vertical direction and a horizontal bar with a wire is known.

Further, in order to maintain the planar relationship of the main bar, for example, a steel bar, a plate-shaped template having holes provided at predetermined positions is inserted and fastened and fixed with nuts from both sides thereof. Technology is also being implemented.

[0004] In the above-mentioned technique, when the main rebar and the horizontal rebar are fastened by a wire, there is a problem that they cannot be fixed sufficiently, are easily loosened by moving or the like, and are deformed by casting concrete.

Further, for example, a steel bar is inserted into a hole of a plate-like member such as a template and fastened with nuts from both sides of the plate-like member. Cutting threads over time is useless, the processing is cumbersome, inefficient and costly.

[0006] Further, by making the diameter of the steel bar smaller than the thread diameter of the nut to be tightened and forming a threaded portion that can be screwed into the nut only at the tightening position, the reduction in the strength due to the decrease in the diameter of the steel bar and the cutting ( Or removal) step, which is inconvenient. In addition, when a screw is usually cut, the tensile strength decreases to 80 to 90%.

[0007]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a steel bar which can be easily inserted into a plate-like member with a nut without reducing the strength as a whole. To provide a joining device.

[0008]

According to the present invention, there is provided a steel bar for joining a plate-shaped member through which a steel bar (1) having a circular cross section is inserted and the steel bar (1) with nuts (5, 6). In the joining device of (1), a cylindrical body (2) having an external thread on the outer periphery is inserted into the steel bar (1), and the cylindrical body (2) has a slit (3) in the longitudinal direction and a plurality of radial directions in the outer periphery. A hole (7a) provided in the plate-like member (7) is provided in the cylindrical body (2) fixed to the steel bar (1) with an adhesive. It is inserted and fastened to the cylindrical body (2) from both sides by nuts (5, 6).

According to the present invention, the steel bar may be a rebar, and a male screw may be provided on an outer periphery of the cylindrical body and a female screw may be provided on an inner periphery thereof.

In the case where a deformed bar is used, the present invention can be similarly applied as long as the inner diameter of the cylindrical body is configured to be large enough to fit the outermost diameter of the deformed bar.

With this configuration, the cylindrical body is inserted through the steel bar in advance. In this case, since there is a slit, it can be easily inserted even if there is a slight error in the diameter of the steel bar or the inner diameter of the cylindrical body.

When the cylindrical body reaches a predetermined position where the plate member is to be mounted, an adhesive is injected from an adhesive injection port to fix the cylindrical member at that position. In the practice of the present invention, the adhesive is preferably a metal adhesive or grout. Also, the adhesive injection port for the slit at the end of the cylindrical body can be fixed by welding.

When the cylindrical body is fixed in this way, the nut is inserted from both ends of the steel bar with the plate-shaped member positioned at a predetermined position, and screwed into an external thread on the outer periphery of the cylindrical body. Just fine.

Therefore, the nut can easily penetrate the steel bar, and the nut can be securely fastened by the cylindrical body integrally bonded and fixed to the steel bar.

When the steel bar is a round bar including a pipe in carrying out the present invention, for example, a screw is provided on the inner surface of the deformed reinforcing bar or the cylindrical body so that the adhesive is easily injected, and the inner surface of the cylindrical body is formed. It is preferable to make the gap between the round bar relatively large. In addition, both ends of the cylindrical body are reduced in outer shape so that the nut can be easily screwed together, and they come into close contact with the screwing of the nut,
The adhesive is distributed evenly between the two.

When a deformed steel bar is used in the practice of the present invention, the cylindrical body preferably has an inside diameter substantially the same as that of the projecting portion on the surface of the steel bar. However, in this case, since the protruding portion of the surface of the steel bar defines the inner surface of the cylindrical body, it is preferable to provide a plurality of adhesive injection ports.

Further, when the diameter of the steel bar is large, it is preferable to use a cylindrical body provided with irregularities along the screw also on the inside. In this case, the cylindrical body can be easily formed by pressing.

In practicing the present invention, when a cylindrical body or a nut does not require a particularly high-strength portion, for example, when it is used for a portion where it is necessary to cast concrete and fix it until it is filled, a plastic material is injection-molded. It may be manufactured.

Further, when a metal cylindrical body is used and a reinforcing bar is inserted into a mating sleeve at a joint of a column, the cylindrical body at the portion where the reinforcing bar is to be inserted must be removed. In that case, it is preferable to make a cut in the longitudinal direction (axial direction) in the portion of the cylindrical body to be removed. By doing so, the portion of the cylindrical body to be removed is easily peeled off. In this case, the adhesive is not injected into the portion to be removed.
In the case of plastic, it may be removed by heating, for example.

In the present specification, a plate-shaped member means that a portion to be fastened with a nut is plate-shaped, and a band-shaped member such as a steel plate, a flange portion of an L-shaped member, or a web of a channel member. Part and the like.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows, for example, that a steel bar 1 is joined to a hole 7a formed in a strip steel plate 7 as a plate-like member shown in FIG. In this embodiment, a sheath 2 which is a cylindrical body is inserted into a reinforcing bar 1.

Referring to FIG. 3, the sheath 2 is made of steel and has an external thread 12 formed on the outer periphery. A slit 3 is provided in the longitudinal direction over the entire length of the sheath 2, and a radius is formed on the outer periphery. A plurality (two in the illustrated example) of adhesive injection holes 4 penetrating in the direction are perforated.

A sheath 2 is fixed to a predetermined position of the reinforcing bar 1 by injecting an adhesive from an adhesive inlet 4 or is fixed by welding or the like. Referring to FIG. A hole 7 a of the steel 7 is inserted, and nuts 5 and 6 are screwed from both sides of the steel strip 7, and the steel strip 7 is fastened to the sheath 2. That is, the steel strip 7 is fastened to the reinforcing bar 1.

In this case, the position of the strip 1 in the vertical direction of the reinforcing bar 1 can be easily adjusted with high accuracy by finely adjusting the nuts 5 and 6.

Also, if the reinforcing bars 1 are similarly arranged and fixed at a desired pitch in the longitudinal direction (the left-right direction in the figure) of the steel strip 7, the reinforcing bars 1 can be accurately and firmly arranged at the desired pitch. Yes, for example, it can be used as a base to build a reinforced bird cage.

FIGS. 5 and 6 show another embodiment of the sheath, in which a plurality of cuts 9 (eight in the illustrated example) are provided almost parallel to the slit 3 up to the position of the injection port 4. It is used when there is a step of injecting an adhesive downward from the inlet 4 to adhere only to the lower side to the reinforcing bar, removing the sheath 2 in a portion having the cut 9, exposing the reinforcing bar, and inserting the reinforcing bar into another sheath, for example. It is convenient.

FIG. 7 shows another embodiment of the sheath, in which a male screw 23 is provided on the outer circumference of a sheath 22 shown in cross section and a female screw 24 is provided on the inner circumference, and a plurality of adhesive injection ports 4 (shown in FIG. (3 in the example). Note that the slit is not shown because of the sectional view. In the case of a large-diameter steel bar, the adhesive can be easily injected and the air can be easily discharged, so that it can be firmly bonded.

FIG. 8 shows a preferred relationship between the sheath 2 and the round bar 1 with respect to the round bar 1 including a pipe. That is, the injection port 4 is provided on the opposite side of the open slit 3, and the adhesive S is injected from the injection port 4 into the space between the sheath 2 and the round bar 1 as illustrated.

FIG. 9 shows the embodiment of FIG. 8 in which the plate-like member is tightened with nuts 5, 6 (the nut 6 is not shown because it is on the lower side). As shown, the adhesive S is relatively uniformly distributed between the round bar 1 and the sheath 2.

FIG. 10 shows a case where a deformed steel bar 1A is used as a reinforcing bar. In this case, the deformed steel rod 1A has a space defined by the projections 1B and 1C protruding outward in the radial direction.
Must be provided.

FIG. 11 shows that the sheath 2 shown in FIG.
(The nut 6 is not shown as in FIG. 9). Also in this case, the adhesive S is applied almost uniformly by tightening the nut.

The above examples all show the case where the plate member 7 and the sheath 2 are made of a steel material.
In both cases, a resin plate or a resin molded product can be used, and is not limited to steel.

[0033]

The present invention is configured as described above, and can provide the following excellent effects. (1) In a steel bar framework for rebar assembly or the like, if a plate-like member is used at a key point, a framework that is resistant to deformation can be easily formed. (2) A threaded portion can be provided at an arbitrary position of the bar without lowering the tensile strength of the bar. (3) Since cylindrical bodies, plate-like members, nuts, and the like can be prepared at the factory, high-precision, high-efficiency work can be easily performed on site. (4) Accurate work can be performed in a short construction period, and it can be widely applied to construction using steel bars.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a plan view showing the plate member of FIG. 1;

FIG. 3 is a partial sectional side view of a cylindrical body.

FIG. 4 is a plan view of FIG. 1;

FIG. 5 is a view showing a cylindrical body according to another embodiment of the present invention.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a diagram showing a cylindrical state according to another embodiment of the present invention.

FIG. 8 is a cross-sectional view showing an adhesive injection state when the present invention is applied to a round bar.

FIG. 9 is a sectional view showing a state in which the sheath of FIG. 8 is tightened with a nut;

FIG. 10 is a cross-sectional view showing an adhesive injection state when the present invention is applied to a deformed steel bar.

FIG. 11 is a sectional view showing a state in which the sheath of FIG. 10 is tightened by a nut;

[Explanation of symbols]

1 ... Rebar 2, 22 ... sheath 3 ... Slit 4: Adhesive injection port 5, 6 ... nut 7 ... Plate member 9 ... cut 12, 23 ... male screw

Claims (3)

(57) [Claims] 1. A steel bar joining apparatus for joining a plate-shaped member through which a steel bar (1) having a circular cross section is inserted and the steel bar (1) with nuts (5, 6).
A cylindrical body (2) having an external thread on its outer periphery is inserted into the cylindrical body (2). The cylindrical body (2) has a slit (3) in the longitudinal direction and a plurality of adhesive injection ports (4) penetrating in the radial direction on the outer periphery. And a hole (7a) provided in the plate-like member (7).
Is inserted into a cylindrical body (2) fixed to a steel bar (1) with an adhesive, and fastened to the cylindrical body (2) by nuts (5, 6) from both sides. apparatus. 2. The steel bar joining device according to claim 1, wherein the steel bar is a reinforcing bar. 3. An external thread (2) on the outer periphery of said cylindrical body (2).
3) The steel bar joining device according to any one of claims 1 and 2, wherein a female screw (24) is provided on an inner circumference.