JPH0347077Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a plug used for injecting a grouting agent such as a resin into a void formed in a concrete building.

[Conventional technology and problems]

When voids occur in buildings due to cracks in concrete or floating mortar and tiles, it is dangerous as water leaks and mortar and tiles fall, so these cracks and voids are filled by injecting grouting agent. There is a need.

In the conventional grout injection method, an injection plug is attached to a wall surface, a syringe is connected to the plug, and grout is injected into the gap through the plug.

For this reason, a portion of the plug protrudes outside the wall surface after the grout has been poured, and the plug must be removed after the grout hardens, which is inconvenient and time-consuming.

This idea was created to eliminate the above-mentioned inconvenience, and by breaking off the protruding part from the wall surface after injecting the grout, it eliminates the extraction work and greatly improves the efficiency of grout injection work. It is an object of the present invention to provide a grouting agent injection plug that can be used.

[Means for Solving the Problems] In order to solve the above problems, this invention provides a check valve that is pushed open by the injected grout into the cylindrical plug body through which the grout injection path passes. , and a thin thick part for breaking off the injection end side is provided around the peripheral wall of the plug body at a position near the injection side end,
The structure is such that the check valve is located closer to the discharge side end than the thin-walled portion.

[Effect]

Insert the plug body into the pilot hole drilled in the wall, connect the syringe to the injection end of the plug body with the thin wall part aligned with the wall, and press the grout into the plug to push the check valve open. It leaks and enters the gap.

When the injection is stopped, the check valve closes, and the work is completed by breaking off the thin part of the plug that protrudes from the wall of the plug body, and repairing the pilot hole in the wall with mortar.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the figure, the plug body 1 is formed into a cylindrical shape through which a grout injection path 2 passes along the axis, and one end has a tapered outer peripheral surface 3 and is connected to a grout injector 4. The end is on the injection side.

A flange 5 and an annular groove 6 are provided on the outer circumferential surface of the plug body 1 closer to one end, and the annular groove 6 allows the peripheral wall of the plug body 1 to have a position closer to the other end than the flange 5. A thin-walled portion 7 is formed for breaking off the injection side end.

A packing 8 is externally fitted into the annular groove 6, and a retaining recess 9 is provided on the outer peripheral surface between the annular groove 6 and the other end of the plug body 1.

Check valve 1 built into the injection path 2 of the plug body 1
0, a groove is provided on the outer peripheral surface of the cylindrical body 11 that fits into the injection path 2, and the inner periphery of the other end of the plug body 1 is caulked into the groove, so that the cylindrical body 11 can be plugged. A spring 14 is connected to a conical valve body 12 made of rubber or the like fixed to the main body 1 and located at the discharge side end of the cylindrical body 11 via a shaft 13 connected to the valve body 12.
It is formed by applying an elastic force that constantly presses against the end of the cylindrical body 11.

The check valve 10 is pushed open by the grouting agent press-fitted into the injection path 2, and allows the grouting agent to be discharged from the other end of the plug body 1, and when the injection is stopped, the spring 14 The force returns the valve to the closed position, preventing the discharged grout from flowing back.

As shown in FIG. 1, the check valve 10 is located closer to the discharge side end than the thin walled part 7, and when the injection side end of the plug body 1 is broken off at the thin walled part 7, It is designed so that it does not protrude outward from the breaking surface.

The plug of this invention has the above structure,
To inject grout into cracks formed on a wall, etc., drill a pilot hole 15 in the wall, drive the plug body 1 into the pilot hole 15 as shown in FIG. It is in a compressed state between.

In this state, a grouting agent injection gun or a nozzle of an injection machine is connected to the injection side end protruding from the wall surface of the plug body 1, and the grouting agent A is press-fitted toward the injection path 2.

The grouting agent A press-fitted into the injection path 2 is connected to the check valve 1.
When the check valve 10 returns to the closed position, the check valve 10 returns to the closed position and prevents the injected grout A from flowing back. To prevent.

When the injection of the grouting agent is completed, the portion protruding from the wall surface of the plug body 1 is struck with a hammer or the like, and the discharge side end is broken off at the thin walled portion 7 as shown in FIG.

At this time, since the check valve 10 is located closer to the discharge side end than the thin-walled part 7, there is no protrusion from the wall surface to the outside after the break-off, and the prepared hole part on the rear wall surface The work is completed by filling it with mortar.

〔effect〕

As described above, according to this invention, a thin-walled part for break-off is provided near the injection-side end of the plug body, and the check valve in the plug body is positioned closer to the discharge-side end than this thin-walled part. By breaking off the injection side of the plug body from the thin-walled part after injecting the grout, there is no protruding part from the wall surface, the work of removing the plug from the pilot hole can be omitted, and the post-processing of the grout injection can be simplified. Easy and efficient.

Furthermore, since a check valve is left in the prepared hole, backflow of the grout agent can be prevented after injection, and post-treatment of the wall surface etc. can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing the state in which the plug according to the invention is used, and FIG. 2 is a longitudinal cross-sectional view showing the same plug on the injection side in a broken state. 1 is the plug body, 2 is the injection path, 6 is the annular groove, 7
1 is a thin-walled part, 8 is a packing, 10 is a check valve, 11
1 is a cylindrical body, 12 is a valve body, 14 is a spring, and 15 is a pilot hole.

Claims (1)

[Scope of utility model registration request] A check valve that is pushed open by the injected grout is built into the cylindrical plug body through which the grout injection passage passes, and a check valve is installed on the peripheral wall of the plug body to break off the injection end side at a position near the injection side end. A grouting agent injection plug including a thin-walled portion around the circumference and the check valve located closer to the discharge side end than the thin-walled portion.