JP2003082814A - Method for connecting joint and reinforcement or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for connecting a reinforcement or the like simply connecting the reinforcement or the like without welding. SOLUTION: A joint is composed of a metal fitting 12, which is formed in a cylindrical shape, in which both sides are narrowed and throttled and which is formed in a size in an extent that one reinforcement or the like 11 can pass, and a short cylindrical centering metal fitting 14, which is stuck fast at the central section of the metal fitting 12, in which opening sections are installed in the same direction as the metal fitting 12 and which is inclined and formed so that the left-right opening sections 13 on both sides are opened outwards, and filler holes 15 consisting of a resin are formed on both sides of the centering metal fitting 14 in the metal fitting 12. When the reinforcement or the like 11 is connected, the reinforcement or the like 11 is inserted into the metal fitting 12 from both sides, the front ends are further inserted into the centering metal fitting 14 and abutted, and melted polypropylene is injected from the filler holes 15 and the inside of the metal fitting is filled with it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common name "Sepa", which is used to connect rebars for connecting rebars at the time of constructing a reinforced concrete structure or to attach to a form 1 as shown in FIG. The present invention relates to a joint used to connect the separate reinforcing bar 2 and the reinforcing bar 3 referred to as, and a connecting method of the reinforcing bar using the joint.

[0002]

2. Description of the Related Art Conventionally, rebars are connected to each other and rebars and separate rebars (hereinafter, rebars and separate rebars are simply referred to as "rebars and the like") are partially overlapped with each other as shown in FIG. Either by spot welding or by welding the reinforcing bars 5 as shown in FIG.

[0003]

[Problems to be Solved by the Invention] Welding requires equipment for this purpose, which is troublesome. SUMMARY OF THE INVENTION It is an object of the present invention to provide a joint capable of connecting reinforcing bars and the like easily and at low cost without welding, and a method for connecting reinforcing bars using the joint.

[0004]

The invention according to claim 1 is a joint used for connecting reinforced reinforcing bars and the like when constructing a reinforced concrete structure, and forming a tubular shape by squeezing both sides of the reinforcing bars and the like. One or two metal fittings that can be passed through and a resin filled in the metal fittings are featured.

According to the present invention, as long as the resin is integrally attached to the reinforcing bar or the like, even if the reinforcing bar or the like tries to come out of the metal fitting, the resin filled in the metal fitting is supported by the narrowed portion and prevented from coming out. It Reinforcing bars and the like used in the present invention (the same applies to the following inventions) are desirably provided with protrusions on the surface to improve adhesion to the resin in order to prevent them from coming out.

Further, since the diaphragm produces a wedge effect, it is desirable that the cross section of the metal fitting is gradually reduced toward both ends. Further, as the resin, a thermosetting resin can be used, but a thermoplastic resin, for example, a polyolefin resin such as polyethylene or polypropylene is preferably used.

The invention according to claim 2 relates to a connecting method using the above-mentioned joint, and the reinforcing bars or the like to be connected are inserted from both sides of the metal fittings and abutted against each other, or they are superposed, and then the reinforcing bars on one side or both sides of the metal fittings. It is characterized in that the resin is injected through the gap between the resin and the injection hole provided at an appropriate position of the metal fitting.

According to a third aspect of the present invention, in the invention according to the first aspect, the centering metal fitting for fitting the tip end of a reinforcing bar or the like from both sides and centering the metal fitting in the metal fitting is oriented in the direction of the opening. Are matched and inserted.

According to the present invention, when the reinforcing bars and the like are inserted into the fitting from both sides of the fitting and the respective tip portions are fitted into the centering fitting from both sides, the reinforcing bars and the like are centered. In addition, the resin filled in the metal fittings is separated into left and right by the centering metal fittings, and the edges are cut off, so if the reinforcing bars try to come out of the metal fittings by the pulling force, the resin around them will also try to come out and In the case of resin, the resin is compressed at the squeezed portion and strongly pressed against the reinforcing bar or the like, so that the reinforcing bar or the like is prevented from coming out.

The centering metal fitting in the present invention is preferably formed by tapering or bending so that the left and right openings open outward. As a result, the tip of the reinforcing bar or the like is guided by the tapered or curved opening, and can be smoothly and surely fitted into the centering fitting.

The invention according to claim 4 relates to a connecting method using a joint according to the invention as claimed in claim 3, in which reinforcing bars and the like to be connected are inserted from both sides of the metal fitting, and the tip of the metal fitting is inserted into the centering metal fitting and abutted. After that, the resin is injected through a gap between the reinforcing bars on one side or both sides of the metal fitting, or through an injection port provided at an appropriate position of the metal fitting.

According to a fifth aspect of the present invention, in the invention according to the first aspect, the metal fitting is configured so that rebar or the like can be passed therethrough, and the tip, preferably the pointed tip, becomes the metal fitting by screwing. Bolts or screws (hereinafter simply referred to as "bolts, etc.") so that they can be press-fitted between the reinforcing bars that are passed through
Is attached to the metal fittings.

According to the present invention, the reinforcing bar or the like which is passed through in the metal fitting is inserted between the reinforcing bars or the like by screwing bolts or the like at the narrowed both ends of the metal fitting with the movement thereof restricted. By press-fitting into, the reinforcing bars are strongly crimped to the tips of bolts and the like, and are prevented from coming out. Then, the resin filled in the metal fittings also enters between the reinforcing bars and the like, and is integrated with the reinforcing bars and the like to make it more difficult to pull out the reinforcing bars and the like.

The invention according to claim 6 relates to a connecting method by a joint according to the invention as claimed in claim 5, wherein the reinforcing bars and the like to be connected are passed through from both sides of the metal fitting so that their tips project from the metal fitting, and then stacked. Screw in the bolt, press the tip into the space between the reinforcing bars, and then inject the resin through the gap between the reinforcing bars on one or both sides of the metal fitting, or through the injection port provided at the proper position of the metal fitting. Is characterized by.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A joint shown in FIG. 4 has a metal fitting 12 formed in a tubular shape, narrowed on both sides and squeezed to allow a single reinforcing bar 11 to pass therethrough, Metal fittings 1
2 is attached to the central part of the metal fitting 2 so that the metal fitting 12 and the opening are oriented in the same direction, and the short cylindrical centering metal fitting 14 is formed so as to be inclined so that the openings 13 on both the left and right sides open outward. Therefore, the metal fitting 12 has resin injection ports 15 formed on both sides of the centering metal fitting 14.

When connecting the reinforcing bars 11 etc., the reinforcing bars 11 etc.
Is inserted into the metal fitting 12 from both sides, and the tip thereof is further fitted into the centering metal fitting 14 and abutted. As a result, the reinforcing bars and the like are centered. Then, a molten thermoplastic resin such as polypropylene is injected from the injection port 15 and filled.
When the resin is solidified by cooling for a certain period of time, the resin is integrated with the reinforcing rod 11 and the like, and the resin does not come out. In the figure, 16 indicates a solidified resin.

The joint shown in FIG. 5 has such a size that a tubular metal member 17 having a vertically long or horizontally long cross section with both sides narrowed and squeezed allows two rebars 11 to pass vertically or horizontally. And a resin injection port 18 is formed in the center, and a tapered bolt 19 is screwed in.

When connecting the rebars 11 and the like, the rebars 1
1 into the metal fitting 17 so that each tip is slightly projected from the metal fitting 17 and vertically or horizontally stacked, and then the bolt 1
9 is screwed in, and its tip is press-fitted between the reinforcing bars 11 and the like.
The movement of the reinforcing bars 11 inserted into the metal fittings 17 is restricted at two places of the narrowed left and right openings.
The bolts 19 are press-fitted between the two to be fixed (FIG. 6). Then, the molten thermoplastic resin is injected from the injection port 18 and filled. After being cooled and solidified, the resin is integrated with the reinforcing bars 11 and the bolts 19 and does not come out.

[0019]

According to the inventions according to claims 1 and 2,
Since the resin attached to the reinforcing bars does not come out of the metal fittings, the reinforcing bars can be fixed, and the fixing can be easily done by inserting the reinforcing bars, etc. into the metal fittings and injecting the resin. Reinforcing bars can be connected at a lower cost than the ones.

According to the third and fourth aspects of the present invention, the reinforcing bars and the like are centered and abutted by simply inserting the reinforcing bars and the like into the centering metal fittings, and the injected resin is separated by the centering metal fittings. Therefore, if the reinforcing bar or the like tries to come out of the metal fittings due to the pulling force, the resin around it will also try to come out, and in the case of a thermoplastic resin, the resin will be compressed at the squeezed part and will strongly crimp to the reinforcing bar, etc. It is possible to prevent the steel sheets from coming out and to firmly connect the reinforcing bars and the like through the joints.

According to the fifth and sixth aspects of the present invention, the reinforcing bars and the like are press-fitted into the bolts while the movements of the metal fittings are restricted at both ends of the metal fittings so that they are firmly fixed and fixed with the injected resin. Therefore, the fixing becomes firm.

[Brief description of drawings]

FIG. 1 is a diagram showing a mode in which a reinforcing bar and a separate reinforcing bar are overlapped and connected.

FIG. 2 is a view showing a mode in which reinforcing bars and the like are overlapped and spot-welded.

FIG. 3 is a view showing a mode in which reinforcing bars and the like are butted and welded.

FIG. 4 is a cross-sectional view showing a mode in which reinforcing bars and the like are butted and fixed using the joint according to the present invention.

FIG. 5 is a cross-sectional view of a joint for stacking and fixing reinforcing bars and the like.

6 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

11 ... Reinforcing bars, etc. 12, 17 ... 13 ... Opening 14 ... Centering metal fittings 15, 18 ... 16 ... Resin 19 ... Bolt

Claims (6)

[Claims] Claim: What is claimed is: 1. A joint used for connecting reinforced reinforcing bars and the like when constructing a reinforced concrete structure, which has a tubular shape and squeezes both sides to allow one or two reinforcing bars or the like to pass therethrough. And a resin filled in the metal fitting. 2. Reinforcing rods or the like to be connected are inserted from both sides of the metal fitting and abutted on each other, or they are superposed, and then provided through a gap between the rebar or the like on one side or both sides of the metal fitting, or at a proper position of the metal fitting. Resin is injected from the inlet.
A method for connecting reinforcing bars and the like using the joints described. 3. A centering metal fitting for centering a reinforcing bar or the like, in which tip ends of connecting reinforcing bars or the like are fitted from both sides, is inserted into the metal fitting in a closely contacted state with the openings oriented in the same direction. The joint according to claim 1, wherein: 4. Reinforcing bars and the like to be connected are inserted from both sides of the metal fitting,
Further, the tip is fitted into a centering metal fitting and abutted against each other, and then the resin is injected from a gap between one side or both sides of the metal fitting or the like, or from an injection port provided at an appropriate position of the metal fitting. A method for connecting reinforcing bars and the like using the joint according to claim 3. 5. A metal fitting is constructed so that rebars and the like can be passed therethrough, and a bolt or screw is attached to the metal fitting so that the tip is press-fitted between the rebars etc. The joint according to claim 1, wherein 6. A metal fitting is constructed so that rebar or the like can be passed therethrough, and a tip, preferably a pointed tip, is screwed in between the rebar or the like passed over the metal fitting. 6. A method for connecting a reinforcing bar or the like using a joint according to claim 5, wherein a bolt or screw is attached to the metal fitting.