JP6944210B2 - Reinforcing bar joint sleeve - Google Patents

Description

The present invention prevents the filler conduit used for filling the filler into the tubular body from coming out of the tubular vertical wall surrounding the inlet and the discharge port in the sleeve for the reinforcing bar joint that connects the reinforcing bars in the tubular body. Regarding the retaining structure.

The sleeve for a reinforcing bar joint is one in which two reinforcing bar ends are inserted into the inside of the cylinder from opposite positions and both are fixed by a filler injected into the inside of the cylinder, which is shown in Patent Document 1 below. The filling material is injected from the injection port provided at one end of the cylinder. In order to perform this injection work efficiently, the diameter of the injection port is increased, while the discharge port provided at the other end of the cylinder discharges the air pushed by the filler, and at the same time, the injected filler is injected into the cylinder. The diameter of the outlet is made small in order to sufficiently spread it to every corner and improve the density.

Conventionally, in order to improve the fixed state between the inner wall of the tubular vertical wall of the injection cylinder and the filler conduit, a large opening diameter of the injection cylinder is manufactured, and tape is applied to the insertion end of the filler conduit on the insertion side. Was wound around the body to adjust the thickness, and an adhesive was also used to push the material into the injection cylinder to fit and fix it.

This construction involves wrapping work while adjusting the thickness of the pipe by wrapping the tape around the filler conduit and work using an adhesive, etc., and requires accuracy and time for the fitting work of the filler conduit. It was what I needed.

Japanese Unexamined Patent Publication No. 2008-63729

The present invention is sufficiently tightly fixed by simply inserting the filler conduit into the injection cylinder and the discharge cylinder, which are the insertion ports of the filler conduits of both the inlet and the discharge port of the sleeve for reinforced joints, and is sufficiently adhered and fixed at the time of placing concrete. It is an object of the present invention to prevent the filler conduit from coming off from the injection cylinder and the discharge cylinder due to the injection pressure of the concrete.

Reinforcing bar insertion openings are provided at both ends of the tubular body, a filler injection port is provided at one end of the side wall of the tubular body, and a discharge port is provided at the other end of the side wall of the tubular body. A sleeve for reinforced joints in which the reinforcing bar inserted from the opening is joined and fixed by hardening the filler filled from the injection port inside the tubular body, and the injection port and the discharge port are surrounded by a tubular vertical wall of the same size. The diameter of the injection port is larger than the diameter of the discharge port, and a locking projection that continuously extends from the opening to the tubular body is provided at a position facing the inner wall of the tubular vertical wall of the injection port. There is a retaining protrusion that extends continuously from the opening to the tubular body at the position facing the inner wall of the tubular standing wall of the discharge port, and the tip side of the locking protrusion and the retaining protrusion is sharp. It is a sleeve for a reinforced joint, which is characterized in that the filler conduit is prevented from coming out by biting into the filler conduit.

The continuous protrusion extending from the opening of the cylindrical vertical wall to the tubular body firmly holds the filler conduit to the sleeve for the reinforcing bar joint and prevents it from coming out.
In addition, by making the tip side of the protrusion an acute angle, it bites into the filler conduit, so the frictional force is increased, and the filler conduit does not come out due to vibrations such as when placing concrete, and work efficiency is improved. Is improved.
In addition, the degree of adhesion of the filler conduit to the tubular standing wall is enhanced, and the filler conduit does not come off from the injection cylinder when concrete is placed.

FIG. 3 is a cross-sectional view of a central portion of the sleeve for a reinforcing bar joint of the present invention in the longitudinal direction. (A) A cross-sectional view of an injection port of the sleeve for a reinforcing bar joint of the present invention, (b) a front view of the injection cylinder, and (c) a cross-sectional view of the injection cylinder. (A) A cross-sectional view of a discharge port of the sleeve for a reinforcing bar joint of the present invention, (b) a front view of the discharge cylinder, and (c) a cross-sectional view of the discharge cylinder.

Hereinafter, the present invention will be described with reference to the drawings based on examples.
Example 1
FIG. 1 shows a schematic cross-sectional view of the sleeve 1 for a reinforcing bar joint of the present invention at the center in the longitudinal direction. The rebar joint sleeve 1 is composed of a cylindrical main body, a peripheral side wall 2, and reinforcing bar insertion ports 3 and 4 at both ends of the peripheral side wall 2. Reinforcing bars inserted from the reinforcing bar insertion ports 3 and 4 are arranged in the space 5 inside the cylinder, and the filler is filled and solidified. A plurality of reinforcing protrusions 6 are formed on the inner wall of the peripheral side wall 2 of the space 5, and a reinforcing bar tip stop portion 7 for preventing the reinforcing bar from coming out to the opposite side is provided at a substantially central portion of the inner wall. .. Further, a reinforcing bar guiding protrusion 8 for guiding the inserted reinforcing bar toward the center of the sleeve for reinforcing bar joint is provided, one end of the peripheral side wall 2 is filled with a filler injection port 9, and the other end of the peripheral side wall 2 is filled. A material discharge port 10 is provided.

As shown in FIG. 2, the injection port 9 has an injection cylinder 11 projecting outward in the orthogonal direction from one end of the peripheral side wall 2, and the opening diameter of the projecting side opening 12 is larger than the opening of the discharge port 10. It is large, and the opening diameter of the peripheral side wall opening 13 is formed smaller than that.

In the injection cylinder 11, the inner wall of the tubular vertical wall is set to the opening diameter of the protruding side opening 12, and as shown by the alternate long and short dash line in FIGS. 2 (b) and 2 (c), salt is formed along the inner wall of the tubular vertical wall. An elastic filler conduit A made of a synthetic resin pipe such as a bipipe is inserted and fixed.

In order to ensure the fixed state between the inner wall of the tubular vertical wall of the injection cylinder 11 and the filler conduit A, the locking projection 14 protrudes from the inner wall of the tubular vertical wall toward the core of the injection cylinder 11. It is formed.

As shown in FIG. 2B, several locking projections 14 of the tubular standing wall are provided at positions facing the inner peripheral wall of the tubular standing wall.
It can be in various forms such as a chevron protrusion, a protrusion along the longitudinal direction of a cylindrical vertical wall, or a combined protrusion thereof. Further, the tip side of the protrusion is sharpened so as to bite into the filler conduit A to prevent the filler conduit A from coming out.

As shown in FIG. 3, the discharge port 10 of the discharge cylinder 15 has the inner wall of the cylindrical vertical wall as the opening diameter of the protruding side opening 16, and is shown by the alternate long and short dash line in FIGS. 3 (b) and 3 (c). , A filler conduit B made of a tubular synthetic resin pipe such as a vinyl chloride pipe having elasticity is inserted and fixed along the inner wall of the cylindrical vertical wall. At the position of the opening 17 on the peripheral side wall side, the tip end portion of the filler conduit B hits the peripheral wall and stops.

In order to strengthen the fixed state between the inner wall of the discharge cylinder 15 and the filler conduit B, a retaining protrusion 18 is provided from the inner wall of the tubular vertical wall toward the center of the discharge cylinder 15 as in the case of the injection opening. It is overhanging.

In particular, when the filler filled in the space 5 inside the sleeve 1 for the reinforcing bar joint is discharged outward from the discharge cylinder 15, a force in the direction of pulling out the filler conduit B from the discharge cylinder 15 acts. Therefore, the retaining protrusion 18 applies a force that opposes the force to prevent the discharge cylinder 15 from coming out of the tubular vertical wall.

1 Reinforcing bar joint sleeve 2 Peripheral side wall 3, 4 Reinforcing bar insertion port 5 Space 6 Protrusion 7 Reinforcing bar tip stop 8 Reinforcing bar guidance protrusion 9 Injection port 10 Outlet port 11 Injection cylinder 12, 16 Protruding side opening 13, 17 Peripheral side wall side Opening 14 Locking protrusion 15 Discharge cylinder 18 Retaining protrusion A Filling material conduit

Claims (1)

Reinforcing bar insertion openings are provided at both ends of the tubular body, a filler injection port is provided at one end of the side wall of the tubular body, and a discharge port is provided at the other end of the side wall of the tubular body. A sleeve for reinforced joints in which the reinforcing bar inserted from the opening is joined and fixed by hardening the filler filled from the injection port inside the tubular body, and the injection port and the discharge port are surrounded by a tubular vertical wall of the same size. The diameter of the injection port is larger than the diameter of the discharge port, and a locking projection that continuously extends from the opening to the tubular body is provided at a position facing the inner wall of the tubular vertical wall of the injection port. There is a retaining protrusion that extends continuously from the opening to the tubular body at the position facing the inner wall of the tubular standing wall of the discharge port, and the tip side of the locking protrusion and the retaining protrusion is sharp. A sleeve for reinforced joints, which is characterized in that the tip of a protrusion bites into the filler conduit to prevent the filler conduit from coming out.

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