JP2785937B2 - Anchor plug attached to chemical liquid injector for repair of concrete building - Google Patents

Description

The present invention relates to an industrial application field for repairing a wall or the like of a concrete building by bonding and reinforcing the same by injecting a chemical solution, particularly when the injection position extends deep. Field of the Invention The present invention relates to a repair liquid injector mounting anchor plug that can reliably inject a chemical liquid by smoothly replacing air in a part.

Conventional technology: When a crack occurs on the wall of a concrete building or the exterior wall rises, a small hole is drilled at a required position and an anchor plug is inserted, and a pump type chemical injector is inserted into the anchor plug. A method is adopted in which the tip of the is screwed in and a chemical solution is press-fitted.

An anchor plug used in such a method is disclosed in Japanese Patent Application Laid-Open No. 60-261868, a metal expansion anchor plug, or a double anchor disclosed in Japanese Utility Model Application Laid-Open No. 63-37757. Tubular anchor plugs are known.

Problem to be solved: The anchor plug as described above is effective as it is in the case of the former metal expansion plug itself since it itself ultimately functions as an anchor, and is provided for expansion. Although the residual air is replaced at the time of injection of the chemical solution from the cut portion, liquid leakage is also likely to occur. In the latter synthetic resin anchor plug, when the chemical solution is injected, the internal residual air is discharged through the gap of the double pipe and replaced, but when the injection hole becomes deeper, the liquid near the insertion end of this anchor plug is Even if air can be replaced with residual air, the air in the deep part of the hole is not replaced, and it is difficult to achieve the purpose. The same applies to the former expansion plug.

Since such a phenomenon is difficult to confirm easily in appearance, it is overlooked and the construction is finished, which causes a problem at a later date. In short, it is difficult to fill the deep part with the adhesive to make sure the reinforcement, and sometimes the reinforcement on the surface layer may end up.

Means for Solving the Problems: In view of such a situation, the present invention solves the problem and injects a chemical liquid so that the adhesive liquid can penetrate to a deep part without requiring complicated operations. It is an object of the present invention to provide a repair liquid injector mounting anchor plug that allows effective replacement of air at a location and injects a chemical liquid while discharging residual air to the outside without difficulty.

In the present invention, as an anchor plug of a drug solution injector, a tapered outer shape is formed in a tapered tubular shape so that the residual air in the gap and the drug solution are smoothly replaced through the injection hole, and the drug solution is injected into the base. Of a concrete building comprising a plug body having a screw portion to which a tip injection pipe portion of a vessel can be screwed and attached, and a synthetic resin sheath tube fitted and fitted to the plug body and placed in a chemical solution injection hole. A repair liquid injector mounting anchor plug, wherein a cylindrical discharge pipe that can be cut and set at a required length so as to protrude from the front end of the sheath cylinder is integrally provided at a tip of the plug body. It is.

Action: According to the present invention, the combined outer shape of the main body of the anchor plug and the sheath cylinder is appropriately sloped, and the length of the discharge pipe integrally connected to the tip of the plug main body is provided for injection. For example, in the case where the chemical liquid injection part is used for repairing the exterior wall, it is necessary to set the dimensions of the discharge pipe end to be deeper than the gap of the raised part, and then push the anchor plug into the hole part. Fix it. In this state, the protrusion protruding from the outer periphery of the sheath cylinder comes into contact with the peripheral surface of the perforated hole to exhibit the locking function,
At the same time, by using a packing material for fixing to the hole, the gap between the outer periphery and the wall surface of the hole is closed to stop the liquid leakage, and the fixing is ensured.

If a pump-type chemical liquid injector is attached to the opening of the main body of the anchor plug to perform injection, the chemical liquid is discharged from the distal end discharge pipe of the plug main body. Since the end of the discharge pipe is located at the deep part of the hole, the discharge of the liquid chemical causes the residual air in the liquid medicine injection gap to be pushed out from the gap between the sheath cylinder and the main body along the peripheral wall of the hole, and the air and liquid chemical are discharged. Are naturally replaced in the injection hole.
As a result, the air injected into the gap is pressed by the injection pressure of the chemical solution, and is quickly expelled to the outside through the gap part opened to the atmosphere, and the chemical solution replaces the air and fills the gap, thereby anchoring. Until the exhaust space of the stopper is closed by the chemical solution, the chemical solution can be smoothly and smoothly filled.

Embodiment: The present invention will be described below with reference to an embodiment diagram.

FIG. 1 shows an example of an anchor plug (1) for attaching a liquid injector for repair of the present invention, and a discharge pipe (6) at a tip thereof.
A plug body (2) integrally provided with the plug body (2)
And a sheath tube (7) fitted and mounted on the housing.
These are all molded from synthetic resins such as polyethylene, polypropylene and vinyl chloride.

As shown in FIGS. 2 to 4, the plug body (2) has a base (3) with a large diameter and a chemical injector (10) (described later) inside.
A female screw (4) that can be attached to the front end is engraved to form a gently tapered tube toward the front end. A chemical solution discharge pipe (6) is integrally connected to the tip of the stopper body (2), and the discharge pipe (6) is cut into a required length according to the situation at the work site so that it can be used. It is. A plurality of locking projections (5) are provided on the outer periphery of the base (3) in a state of being interrupted in the circumferential direction.

A sheath tube (7) fitted and fixed to such a plug body (2).
Is substantially similar in shape to the plug body (2), and has an inner dimension that is capable of forming a slight gap (a) with the plug body (2). Protrusions (8) which are pointed at a plurality of places by a suitable pitch are provided on the outer periphery. A plurality of ventilation grooves (9) are engraved on the inner peripheral surface (7 ") in the longitudinal direction, and the inner peripheral surface of the base (7 ') is engaged with the plug body (2). A locking groove (9 ') is provided for engaging with the stop projection (5).

At the time of injecting the chemical, an injection hole (30) is drilled at a required location, and especially when the injection portion is made at a deep position in the repair wall portion, the anchor plug (1) cannot be pushed too far. The anchor plug (1) is in a state where it can serve as a fixing plug of the liquid injector (10).
Drive into injection hole (30). At this time, an appropriate amount of a cloth piece or the like is wound around the base (7 ') of the sheath tube (7) to secure the seal and the fixing force. Prior to the driving into the hole (30), the end of the discharge pipe (6) is cut into a length corresponding to the depth of the hole so that the end of the discharge pipe (6) is inserted to the deep part of the injection hole, and the mounting operation is performed. Therefore, the anchor plug (1) is inserted into the injection hole (30) in a state where the chemical solution discharge pipe (6) integral with the plug body (2) protrudes longer than the end of the sheath tube (7).

Although it depends on the perforation depth of the injection hole (30), when this method is adopted, it is preferable that the end of the discharge tube (6) is at least 15 mm longer than the end of the sheath tube (7).

When the anchor plug (1) is driven into the injection hole (30) pierced in the wall surface, a packing material such as a cloth piece wound around the base (7 ') of the sheath tube and a number of sharp projections (8) on the outer surface are formed. It is held and fixed on the peripheral surface of the hole by the deformation locking force. Therefore, as shown in FIG. 5, a well-known pressure-accumulating pump-type chemical liquid injector (10), a cylinder end injection pipe (11), and a screw (12).
Is screwed into the female screw (4) of the anchor plug (1), and the liquid injector (10) is attached to the wall surface (A) by the anchor plug (1).

Unlock the chemical liquid injector (10) that was previously locked to prevent the discharge of the chemical liquid, and started to inject the chemical liquid (40) (usually epoxy adhesive) into the gap (31) with the accumulated pressure I do. The injected chemical solution (40) is pushed out of the anchor plug main body (1) through the discharge pipe (6) into the interior of the injection hole (30), and flows into the cavity in the wall, and the air remaining in the cavity is removed. Move through low resistance parts. At this time, the inner end of the gap (a) of the anchor plug (1) fixed to the injection hole (30), which is opened to the outside by the plug body (2) and the sheath tube (7), is the end of the discharge pipe (6). Because it ’s farther away,
The air, which is not immediately closed by the liquid medicine and is pushed by the liquid medicine (40) from the gap (31) in the wall and moves, is quickly discharged by the gap (a) due to the differential pressure between the inside and outside. In other words, the replacement of the chemical solution with the air is performed quickly, and the chemical solution is smoothly and reliably filled without generating air pockets (see FIG. 6).

After the chemical solution injection operation is completed, the chemical solution injector (10) may be removed from the anchor plug (1) and used for the next operation. After consolidation of the injection solution, the exposed portion of the anchor plug can be cut or buried with a joint material for finishing.

As described above, the anchor plug to be used is set to have such a length that the discharge pipe can be cut so that the length of protrusion from the exhaust opening can be arbitrarily determined according to the situation at the injection site.

Effect of the Invention: According to the present invention, when attaching an anchor plug for mounting a pump-type drug solution injector at a target position, an injection drug solution discharge end is extended to a deep portion of an injection hole, and a drug solution discharge position and an anchor plug are connected. By providing an acceptable long distance between the residual air discharge gap and the end position of the residual air discharge gap, it is possible to prevent the air discharge path from being easily cut off by the injected chemical liquid. The present invention is a useful invention in which the replacement of the chemical solution with the residual air is performed smoothly and reliably, the chemical solution can be injected into a deep part, and the solid repair can be easily performed.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an example of an anchor plug for attaching a repair liquid injector according to the present invention, FIG. 2 is a longitudinal sectional view, FIG. 3 is a III-III sectional view of FIG. 2, and FIG. FIG. 5 is a partially cut front view, FIG. 5 is a view showing a liquid injection mode, and FIG. 6 is an enlarged explanatory view of a main part. (1) ... anchor plug, (2) ... plug body (3) ... base of plug body, (4) ... female screw (5) ... locking projection, (6) ... discharge pipe (7) ... sheath tube, (7 ') ... base of sheath tube (8) ... pointed protrusion, (9) ... vent groove (10) ... chemical liquid injector, (11) ... injection pipe (30) ) ... Injection hole, (31) ... Void (40) ... Chemical solution

Claims (1)

(57) [Claims] 1. A stopper body having a tapered outer shape and a threaded portion at the base of which a tip injection tube portion of a drug solution injector can be screwed and mounted, and fitted and mounted on the stopper body for drug solution injection. An anchor plug for repairing a chemical liquid injector for repairing a concrete building comprising a synthetic resin sheath tube fixed to a hole, wherein the stopper body is cut at a required length so as to protrude from the front end of the sheath tube. An anchor plug for repairing a chemical liquid injector for repairing a concrete building, wherein a settable cylindrical discharge pipe is provided integrally.