JPH0738568Y2 - Anchor pin for repairing outer wall of building - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to improvement of an anchor pin used for repair work to prevent the outer wall of a mortar from rising or peeling off from a concrete skeleton of a building.

<Prior Art> The inventor of the present invention has previously proposed the invention of Japanese Patent Laid-Open No. 2-8462 for this type of “building outer wall repair method and anchor pin therefor”.

The anchor pin (P) of this known invention has a hollow anchor body (1) longer than the thickness (W) of the mortar outer wall (M).
1) and a plug (12) inserted therein, and a groove (17) for letting out the adhesive (B) is also formed on the trunk surface of the anchor body (11). Adhesive injection nozzle (15) at the base end of the body (11)
Connection port cylinders (13) are formed respectively.

When the outer wall (M) of the mortar is repaired, an anchor pin driving hole (22) having a depth reaching the concrete skeleton (C) from the outer wall (M) of the mortar is first formed by a drilling tool (21) such as a drill. The anchor body (11) of the anchor pin (P) is driven into the driving hole (22), and the internal plug (12) is tapped with a tapping tool (23) such as a hammer to anchor the anchor. Body (11)
Is expanded and deformed from its tip, so that it is permanently fixed to the concrete skeleton (C).

Next, to the nozzle connection port cylinder (13) of the anchor body (11), which is to be exposed at the surface of the mortar outer wall (M).
Insert the adhesive injection nozzle (15), and then inject and fill the adhesive (B) such as wet-curing type epoxy resin or polymer cement slurry under constant pressure from the pump (24). To do.

Then, the adhesive (B) flows out from the split groove (17) of the anchor body (11) to the surroundings, and also penetrates into the mutual gap between the mortar outer wall (M) and the concrete skeleton (C), Both are anchor pins (P) and adhesive (B)
Thus, the outer wall (M) of the mortar is firmly bound and integrated without fear of rising or peeling off.

In that case, according to the anchor pin (P) of the form shown in FIGS. 1 to 7 and FIGS. 15 and 16 of the above-mentioned known invention, the nozzle protruding over a large diameter from the base end of the anchor body (11). The stopper step surface (16) of the connection port cylinder (13) prevents the backflow of the adhesive (B) and the bending deformation of the outer wall (M) of the mortar (scattering phenomenon).
It is said to be useful for prevention.

<Problems to be solved by the invention> However, as long as the configuration is limited to this, there is always a certain gap between the anchor pin (P) and the driving hole (22), and Since the inner peripheral surface of the driving hole (22) has an irregular shape, the adhesive (B) which has received the pressure applied by the pump (24) flows backward so as to escape from the void to the outside. It is also difficult to optimally adjust the pressing force to prevent the backflow.

Particularly, in the anchor pin (P) in which the nozzle connection port cylinder (13) is formed to project from the base end portion of the anchor body (11), the driving hole (22) is also opened as a corresponding so-called stepped shape. , The stepped part is easily missing due to drilling.
The adhesive (B) overflows in a backward flow more and more because the shape collapses and the above-mentioned voids expand, and the repair work cannot be carried out easily and efficiently, and the surface of the mortar outer wall (M) is unsightly and dirty. There is a problem that the appearance makeup effect of the building is deteriorated.

<Means for Solving the Problem> The present invention intends to improve such a problem, and for that purpose, an anchor main body of a fixed length used by driving from an outer wall of a mortar to a concrete skeleton and a tip portion of the anchor main body are used. It is equipped with a plug inserted into the hollow inside of the anchor body in order to forcibly expand and deform it and bite and fix it in the driving hole.The base end of the anchor body receives the adhesive injection nozzle. The outer wall of the building is repaired by forming a mouth pipe with a large diameter and forming a groove for the adhesive outflow from the nozzle receiving mouth pipe under pressure to form an opening on the body surface of the anchor body. In the anchor pin for use in the anchor body, a flexible backflow check valve for adhesive, which is restrained by the nozzle receiving port cylinder at the base end of the anchor body, is fitted to the body surface of the anchor body, and the anchor is set. When that implanted body into driving hole, the mutual gap between the cylinder surface of the implant hole and the anchor body, is characterized in that set to be sealed by deforming action of the check valve.

<Operation> According to the present invention having the above-mentioned structure, when the anchor body is driven into the driving hole and fixed, the check valve for adhesive which is fitted in the anchor body and follows the inner peripheral surface of the driving hole. As described above, since the mutual clearance between the body surface of the anchor body and the driving hole that surrounds the body is completely sealed, the hollow interior of the anchor body is then kept under constant pressure. Even if the adhesive is injected into and filled with the adhesive, the adhesive that tries to overflow to the outside along the mutual gap will be completely blocked by the check valve, and the surface of the outer wall of the mortar will be unsightly and dirty. There is no risk of reducing the efficiency of repair work.

<Embodiment> Hereinafter, the concrete constitution of the present invention will be described in detail with reference to the illustrated embodiment, and FIGS. 1 to 10 show an anchor pin (P) according to its basic example and an mortar outer wall (M ) Is a repair work process, and (11) is an anchor body made of stainless steel or other metal material that does not rust, and a special steel ingot plug (12) cannot be removed inside the hollow body. Has been inserted into.

The anchor body (11) has a thickness of about 6 mm, for example, from the surface of the mortar outer wall (M) to a certain depth of the concrete skeleton (C) by plastic working of the above-mentioned metal material wound in a coil shape, especially cold forging. It is made in a hollow cylinder with a reachable length. The length of the anchor body (11) is actually prepared as various types according to the change of the thickness (W) of the outer wall (M) of the mortar, as is clear from the comparison between FIG. 9 and FIG. It will be used selectively.

(13) is at the same time as the cold forging at the same time, from the base end portion in the longitudinal direction of the body surface of the anchor body (11), for example, about
It is a nozzle receiving mouth tube that has a diameter of 9 mm and is continuously and integrally projected, and its back surface is the anchor body (11).
As a restraining shoulder surface (14) that intersects the body surface of the mortar at a right angle (θ), it is possible to suppress the rise of the outer wall of the mortar (M). Further, the opening edge of the nozzle receiving port cylinder (13) has a conical sloped surface (15) that spreads outward so that a later-described adhesive injection nozzle (grease gun) can be smoothly and correctly received. .

The hollow inside of the anchor body (11) is perforated by a drilling process following the cold forging into a stepped shape with a small diameter near the tip as shown in FIG. The plug (12) is locked so that it does not fall out toward the tip of the anchor body (11).
(17) is a stopper ring that prevents the plug (12) from slipping out in the opposite base end direction, and is inward from the midway portion of the trunk surface by so-called kneading up of the anchor body (11) after the perforation process. Is formed overhanging.
Therefore, the stopper ring (17) also functions as a reinforcing rib of the anchor body (11) itself.

(18) is a groove formed in parallel from the tip of the anchor body (11) along the longitudinal direction of the body surface by subsequent milling of the anchor body (11). Performs the outflow action of the adhesive (B) toward. From that meaning, the groove (18) is a mutual gap between the mortar outer wall (M) and the concrete skeleton (C) (floating margin part of the mortar outer wall).
As a constant working length (L) that necessarily faces (S), the apertures are arranged as long as possible.

In this respect, in FIGS. 1 to 4, the groove (18) for the adhesive to flow out.
Is also cut from the tip portion of the anchor body (11) by the above-mentioned working length (L) so that it also functions as the expansion deformation from the tip portion of the anchor body (11). Further, by cutting the groove (18) into a minus type or a single letter type, it is possible to prevent the strength of the anchor body (11) from being lowered in relation to the thickness of the anchor body (11).

However, as long as it does not reduce its strength, it may be cut as a plus type groove (18). Furthermore, as suggested by the first modification of FIG. 11, the adhesive outflow groove (18) is opened to the trunk surface of the anchor body (11) as a large number of so-called scattered distributions. In addition, the split groove (19) for expanding and deforming from the tip end, which is separate from the groove (18),
The anchor body (11) can also be arranged in a row on the body surface.

(20) is a backflow check valve for the adhesive that is fitted and set on the body surface of the anchor body (11) as a state in which it is blocked by the back surface of the nozzle receiving port cylinder (13). It is made from a clay material, preferably in a ring shape slightly larger than the thickness of the nozzle receiving port cylinder (13). Instead of increasing the diameter, the thickness may be increased to achieve the desired sealing action.

In particular, when the check valve (20) is made of butyl rubber, it is desirable to sprinkle an appropriate powder such as baby powder on the surface thereof in order to prevent handling difficulties due to stickiness on the surface. That is, the ring-shaped check valve (20) can be mass-produced by automatically and continuously punching the powdery sheet-shaped butyl rubber to which the powder has been sprinkled.

Since the check valve (20) is in the form of a ring made of the above-mentioned pseudo clay, it can be fitted into the anchor body (11) by inserting it into the body surface of the anchor body (11). As a more complete method,
For example, on the surface where the check valve (20) faces the back surface of the nozzle receiving port cylinder (13), omit the dusting of the powder and intentionally attach it to the back surface of the nozzle receiving port tube (13). Or the stopper ring (not shown) of the check valve (20) is protruded outward from the body surface of the anchor body (11), and the back surface of the nozzle receiving port cylinder (13) is uneven. The surface may be roughened and the check valve (20) may be temporarily attached thereto.

FIGS. 12 to 15 show a second modified example of the anchor pin (P) according to the present invention and its fixed driving state, in which the nozzle receiving cylinder (1) of the anchor body (11) is constructed.
Nozzle (25) for adhesive injection or its adapter (shown in the figure) is formed by enlarging 3) into a cylindrical shape deeper than that of the above basic example and engraving a female screw (27) on the inner peripheral surface. (Omitted) is established so that the connection can be made more stable.

Also, the hollow inside of the anchor body (11) is replaced with the stepped portion (16) of the above-mentioned basic example, and is plastically worked as the tapered conical sloped surface (28), so that the plug (12) is held in the retaining state. is doing.

Further, FIGS. 16 to 18 show a third modification of the anchor pin (P) and a repair work process of the outer wall (M) of the mortar by this modification, which projects from the base end of the anchor body (11). Attach the nozzle receiving nozzle (13) to the adhesive (B)
In order to be able to remove it after the injection, the concave peripheral groove (29) for breaking is engraved near the base end of the body surface of the anchor body (11). Then, this should also function as a stopper for preventing the check valve (20) from falling off. A check valve (20) is attached here.

Since the other configurations and operations in the first to third modifications are substantially the same as those in the basic example, only the corresponding reference numerals to FIGS. , Its detailed description is omitted.

Before carrying out repair work on the outer wall (M) of the mortar using the anchor pin (P) of the present invention constructed as described above, a drilling tool (such as a two-step bit) as shown in FIG. By means of 21), the anchor pin driving hole (22) having a constant depth that reaches the concrete skeleton (C) from the mortar outer wall (M) is opened. The driving hole (22) corresponds to the anchor body (11) of the anchor pin (P), so that the sixth
This is a so-called stepped opening configuration provided with a step portion (23) as shown in the figure.

Then, the anchor body (11) is driven into the driving hole (22) as shown in FIG. 7, and the anchor body (11) is also driven.
The plug (12) inserted in the inside is hammered with a hammering tool (24) such as a hammering rod, and the tip of the anchor body (11) is expanded and deformed, and the concrete hole (C) is driven into the hole. Fix it to (22) by biting it so that it cannot be removed.

At that time, as shown in FIG. 7, the adhesive check valve (20) fitted and set on the body surface of the anchor body (11) is provided with the step portion (23) of the driving hole (22) and the anchor. Body (1
It is sandwiched between the nozzle receiving mouth tube (13) protruding from the base end of (1) and deforms itself in its crushed state, surrounding the trunk of the anchor body (11) and this. The mutual gap (G) with the driving hole (22) is completely sealed.

In particular, the check valve (20) is made of soft butyl rubber and other pseudo clay materials and has no impact resilience, and is driven by the back of the nozzle receiving port cylinder (13). Since it is driven into the hole (22), even if the inner peripheral surface of the driving hole (22) has any irregular shape, even if the stepped portion (23) is missing or loses its shape, As it follows this, it deforms freely and fits on the inner peripheral surface of the driving hole (22).
The excellent sealing effect of the mutual gap (G) is exhibited.

Since the nozzle receiving port cylinder (13) of the anchor body (11) fixed by driving as described above is exposed from the surface of the outer wall (M) of the mortar, as shown in FIG. A nozzle (grease gun) (25) for injecting an adhesive agent is directly inserted into the mouth tube (13) or indirectly through an adapter (not shown), and a wet-curing type epoxy resin or polymer cement slurry is inserted from here. The adhesive (B) such as the above is injected and filled into the hollow inside of the anchor body (11) under the pressurized state.

Then, as shown in FIG. 8, the adhesive (B) passes through the groove (18) opening on the body surface of the anchor body (11),
While flowing out to the mutual gap (G) between the body surface and the driving hole (22), it also spreads and permeates into the mutual gap (S) between the mortar outer wall (M) and the concrete skeleton (C). As a result, the outer wall (M) of the mortar is firmly bound and integrated through the anchor pin (P) and the adhesive (B) to the concrete skeleton (C) without fear of rising or peeling off.

In that case, since the adhesive (B) is injected under the state of being pressed, the mortar passes through the mutual gap (G) between the body surface of the anchor body (11) and the driving hole (22). Attempts to backflow outward toward the surface of the outer wall (M), but the mutual gap (G) is as described above, before the check valve (20).
Since it is completely sealed by the adhesive (B)
There is no possibility of inadvertent backflow, and there is no concern that the surface of the mortar outer wall (M) will be unsightly and stain.

Therefore, finally, the nozzle (25) is attached to the anchor body (1
1), and the nozzle receiving port cylinder (13) of the anchor body (11) and its periphery are epoxy mortar and other plugs (26) that have affinity with the adhesive (B) as shown in FIG. This makes up for the blocked condition.

<Effect of the Invention> As described above, according to the present invention, the anchor body (11) of a certain length used by driving from the mortar outer wall (M) to the concrete skeleton (C) is used, and this is forcibly expanded from the tip. The anchor body (11) is provided with a plug (12) inserted into the hollow portion of the anchor body (11) to be deformed and fixed in the driving hole (22). For forming the receiving port cylinder (13) of the agent injection nozzle (25) with a large diameter, and for flowing out the adhesive (B) injected from the nozzle receiving port cylinder (13) under pressure. Grooves (18)
In the anchor pin (P) for repairing the outer wall of the building having an opening formed in the body surface of the anchor body (11), to the body surface of the anchor body (11), the nozzle receiving port cylinder (13) at the base end thereof. When the anchor body (11) is driven into the driving hole (22) after the flexible check valve (20) for adhesive that is restrained by the fitting is set and set, the driving hole (22) and the anchor body are set. The mutual gap (G) with the body surface of (11) is set so that it can be sealed by the deformation action of the check valve (20). There is an effect that can be completely improved.

In particular, if the configuration of claim 2 is adopted, the check valve (20) for adhesives can be made from a common and inexpensive material, and its effective plastic deformation action and convenience in handling can be exhibited. Will also be possible.

Further, if the configuration described in claim 3 is adopted, the fitted state of the check valve (20) with respect to the anchor body (11) can be kept more stable, and the fall prevention effect can be beaten.

[Brief description of drawings]

FIG. 1 is a perspective view showing a basic example of an anchor pin according to the present invention, FIGS. 2 and 3 are side views and a front view, and FIG. 4 is a third view.
Fig. 4-4 is a sectional view, Fig. 5 to 9 are sectional views showing the steps of repairing the outer wall of the mortar by using the anchor pin, and Fig. 10 is a fixing fixing of a long anchor pin corresponding to Fig. 9. FIG. 11 is a side sectional view showing a state, FIG. 11 is a perspective view showing a first modification of the anchor pin according to the present invention, FIGS. 12 and 13 are side views and a front view showing the same second modification, and FIG. Of Fig. 13
Fig. 14 is a sectional view taken along line 14-14, Fig. 15 is a sectional side view showing the anchor pin driven and fixed, Fig. 16 is a sectional side view showing a third modified example of the anchor pin, and Figs. 17 and 18 are the use thereof. FIG. 6 is a cross-sectional view of each side showing a repair work step of the outer wall of the mortar by the method. (11) …… Anchor body (12) …… Plug (13) …… Nozzle receiving cylinder (14) …… Stopping shoulder surface (18) …… Slit groove (20) …… Check valve (22) …… Driving hole (25) …… Adhesive injection nozzle (B) …… Adhesive (C) …… Concrete frame (G) (S) …… Mutual gap (M) …… Mortar outer wall (P) …… Anchor pin

Claims (3)

[Scope of utility model registration request] 1. An anchor main body (1) having a fixed length, which is used by driving from an outer wall (M) of a mortar to a concrete skeleton (C).
1) and a plug (12) inserted into the hollow inside of the anchor body (11) in order to forcibly expand and deform it from the tip to bite and fix it in the driving hole (22). At the base end portion of the anchor body (11), a receiving port cylinder (13) of the adhesive injection nozzle (25) is formed so as to have a large diameter, and a pressure state is applied from the nozzle receiving port cylinder (13). Groove (18) for flowing out the adhesive (B) injected into the original
In the anchor pin (P) for repairing the outer wall of the building having an opening formed in the body surface of the anchor body (11), to the body surface of the anchor body (11), the nozzle receiving port cylinder (13) at the base end thereof. When the anchor body (11) is driven into the driving hole (22) after the flexible backflow prevention valve (20) for adhesive that is stopped by the fitting is set and set, the driving hole (22) and the anchor body An anchor pin for repairing an outer wall of a building, wherein a mutual gap (G) with the body surface of (11) is set so as to be sealed by a deformation action of the check valve (20). 2. A check valve (20) for adhesives is made of plastically deformable butyl rubber or other pseudo clay in the form of a ring, and the surface thereof is dusted with a powder for preventing stickiness. An anchor pin for repairing an outer wall of a building according to claim 1. 3. The nozzle receiving port cylinder (13) is extended substantially at a right angle from the body surface of the anchor body (11) so that the back surface of the nozzle receiving port cylinder (13) is covered with a mortar outer wall (M).
It is designed so that it can function as the stop shoulder surface (14) of the adhesive, and the check valve (20) for adhesive is applied to the stop shoulder surface (14) of the nozzle receiving port cylinder (13) or the body surface of the anchor body (11). )
An anchor pin for repairing an outer wall of a building according to claim 1, wherein the anchor pin is attached so as not to fall off.