JPH0592349U - Anchor pin for repairing outer wall of building - Google Patents

Abstract

(57) [Summary] [Purpose] As a hollow anchor pin used for repair work on the outer wall of a mortar, it prevents backflow of the adhesive due to internal pressure when the adhesive is injected into the anchor pin and lifting of the outer wall of the mortar. [Structure] The hollow anchor main body (11) is provided with split grooves (18) on the body surface of the hollow anchor main body (11) to facilitate the flow of the adhesive (B) and the expansion of the adhesive from the tip portion by the plug (12). The nozzle receiving port cylinder (13) having a diameter larger than the body surface is projected from the base end of the body (11) to prevent the backflow of the adhesive (B) and the mortar at the boundary step with the body surface. Stopping shoulder surface (1 to prevent the outer wall (M) from rising)
4), and a screw (17) which is detachably screwed to the adhesive injection nozzle (15) is engraved on the inner peripheral surface of the nozzle receiving port cylinder (13).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of an anchor pin used for repairing an outer wall of a mortar in order to prevent the outer wall of the mortar from rising or peeling off from the concrete skeleton of the building.

[0002]

[Prior Art]

 Conventionally, an external wall repair method that prevents the mortar external wall that has been wet-processed, such as tiled or bricked, from rising or peeling off from the concrete skeleton of the building is found in, for example, Japanese Utility Model Publication No. 60-123415. A hollow cylindrical anchor pin is used.

In use, the sleeve body (1) of the anchor pin is driven and fixed into the prepared hole (22) drilled from the mortar outer wall (20) toward the concrete skeleton (21), and then the sleeve body is fixed. The adhesive is injected into the hollow interior (2) of (1) by the adhesive injection nozzle (24), and the adhesive is injected by pressure from the body slit (5) of the sleeve body (1) to the mortar outer wall (20). It is designed to spread to the mutual gap (23) between the concrete frame (21) and the concrete frame (21).

[0004]

[Problems to be solved by the device]

 However, in the case of the above anchor pin, an inner taper (4a) is formed at the base end of the sleeve body (1) for causing a spring action, and the tip end of the adhesive injection nozzle (24) is formed there. Since the nozzle (24) is only inserted in contact with the sleeve body (1) and the sleeve body (1) is not stably and firmly connected to the sleeve body (1), the slit (6) is opened at the base end thereof. Combined with the fact that it is formed, the adhesive that has been subjected to the internal pressure at the time of injection easily flows backward as if it escapes from the hollow inside (2) of the sleeve body (1) to the outside.

Therefore, it is necessary to set the injection pressure of the adhesive to a low pressure, and when chips remain in the prepared hole (22), the adhesive does not flow smoothly to every corner, and the spread region thereof As a result, the binding strength of the outer wall of the mortar (20) to the concrete skeleton (21) with high durability cannot be obtained.

Further, when the sleeve body (1) is supported and fixed in the pilot hole (22) by the spring action of thinning by cutting the inner taper (4a), the clasp also has its pilot hole (22). Is a straight shape with a constant opening diameter, and not only is it not perforated into a stepped shape, but the angle of the taper part (4) given to the base end part of the sleeve body (1) is only 15 Since the adhesive, which has been subjected to the internal pressure during injection, also easily flows backward along the outer peripheral surface of the sleeve body (1) so as to overflow to the outside, and the internal pressure during injection It is also impossible to prevent the deformation of the outer wall (20) of the mortar due to the floating deformation (entrainment phenomenon).

[0007]

[Means for Solving the Problems]

 The present invention intends to improve such a problem, and therefore, as an anchor pin for repairing the outer wall of a building, an adhesive is injected from the outer wall of the mortar to guide the adhesive to the floating portion of the unit grid marked on the outer wall of the mortar. The hollow anchor body made of stainless steel or other metal that does not rust and used for driving into the concrete structure, and the anchor body is forcibly expanded and deformed from the tip to bite it into the driving hole and fix it. It is equipped with a steel ingot plug inserted into the hollow inside of the main body, and the receiving cylinder of the adhesive injection nozzle is extended from the base end of the anchor main body to a diameter larger than the reference body surface of the anchor main body. As a result, the stepped portion at the boundary with the reference body surface can function as a restraining shoulder surface for preventing backflow of the adhesive and for preventing rising of the outer wall of the mortar. In addition, the inner peripheral surface of the nozzle receiving port cylinder is engraved with a screw that is detachably screwed and fastened to the nozzle, while the anchor main body except the nozzle receiving port cylinder is almost Overall, when the split groove for expanding from the tip and for flowing the adhesive is driven into the concrete structure and fixed, a part of the opening is inevitably facing the mutual gap between the outer wall of the motor and the concrete structure. The feature is that the openings are arranged in a row with a certain length that can be seen.

[0008]

[Action]

 According to the above configuration of the present invention, the receiving cylinder of the adhesive injection nozzle is projected from the base end portion of the anchor main body so as to have a diameter larger than the reference trunk surface of the anchor main body. Since the step difference between the surface and the nozzle receiving cylinder is set to function as a restraining shoulder surface for preventing backflow of the adhesive and for preventing the rising of the outer wall of the mortar, it does not adhere to the internal pressure during injection. The agent does not flow backward so as to escape to the outside along the mutual gap between the body surface of the anchor body and the driving hole, and there is no concern that the mortar outer wall inadvertently entraps. As a result, it is not necessary to reduce the injection pressure of the adhesive, the spillover area of the adhesive can be expanded as much as possible, and a high strength binding force of the mortar outer wall to the concrete skeleton can be obtained.

Moreover, the inner surface of the nozzle receiving port cylinder is provided with a screw that is screwed and fastened to the adhesive injection nozzle in a detachable manner. It can be connected and fixed well, and therefore the adhesive does not flow backwards as if it overflows from the hollow inside of the anchor body even though it receives the internal pressure during injection, and through the split groove that opens to the crushing reference body surface, it does not contact the mortar outer wall. It can be effectively propagated without any loss to the mutual gap with the concrete skeleton, and in that sense also the durability strength of the mortar outer wall can be increased.

Further, the anchor body is made of stainless steel or other metal material that does not rust, and a plug of a steel ingot inserted into the hollow inside thereof expands from the split groove that also serves as a distribution of the adhesive. Therefore, it is not necessary to add an adhesive flow hole other than the split groove, and there is no fear that the surface of the outer wall of the mortar will be unsightly and soiled due to rusting. Combined with the fact that the adhesive does not overflow outside, the surface of the outer wall of the mortar can be finished beautifully.

[0011]

【Example】

 1 to 5 show a basic embodiment of the anchor pin (P), which is made of stainless steel (SUS304) or other non-rusting material. It consists of a hollow metal anchor body (11) and a frusto-conical or bullet-shaped plug (12) of a special steel ingot inserted into the hollow interior of the hollow mortar, and has a required thickness (W) as described later. It will be penetrated through the outer wall (M) and driven into the concrete frame (C) of the building.

The anchor body (11) has a constant thickness (for example, about 6 mm) and a concrete skeleton (C) from the surface of the mortar outer wall (M) by plastic working, preferably cold forging, of the metal material that does not rust. It is made into a hollow cylindrical type having a constant length (L1) (for example, about 57 mm) that can reach the required depth of.

(13) is a nozzle receiving mouth tube that is continuously and integrally projected outward from the base end of the anchor body (11) at a thickness of, for example, about 9 mm at the same time as the plastic working. The boundary step portion protruding by about 3 mm from the reference body surface of the anchor body (11) having the thickness of about 6 mm is about 45 at least with respect to the longitudinal center line (Y-Y) of the anchor body (11). It is designed to function as a stop shoulder surface (14) that maintains a crossing angle (θ) of degrees.

That is, when the adhesive (B) is injected into the hollow inside of the anchor body (11) by an adhesive injection nozzle (15) described later, the adhesive (B) that has received the internal pressure thereof is an anchor. Reverse flow along the mutual gap (G) between the body surface of the main body (11) and the driving hole (16) is blocked by the restraining shoulder surface (14), and the injected adhesive (B) is also injected. The restraining shoulder surface (14) also prevents the outer wall (M) of the mortar from flexing and deforming (floating phenomenon) from the floating portion (a) due to the internal pressure. That is why.

As a result, since the injection pressure of the adhesive (B) is set to be low, care is not required for the adjustment, and the injection pressure can be adjusted. Therefore, as will be described later, the adhesive (B The spread area (Z) of B) can be expanded as much as possible.

Reference numeral (17) denotes a screw engraved on the inner peripheral surface of the nozzle receiving port cylinder (13), which is directly connected to the adhesive injection nozzle (15) or indirectly through an adapter such as a joint pipe. The nozzle (15) is received and held in the receiving port cylinder (13) in a stable and firm communication connection state by being screwed together, and the adhesive (B) that has also received the internal pressure during injection is The anchor body (11) is prevented from overflowing from the hollow inside to the outside through the nozzle receiving port cylinder (13). It goes without saying that the nozzle (15) can be pulled out from the receiving port cylinder (13) by releasing the fastening.

Further, (18) is a plurality of split grooves formed in an opening array over substantially the entire length of the reference body surface excluding the nozzle receiving port cylinder (13) of the anchor body (11). In addition to promoting the expansion action from the tip portion in 11), it also performs the distribution action of the adhesive (B) from the inside of the anchor body (11) to the surroundings.

That is, when the anchor body (11) penetrates the mortar outer wall (M) and is driven into the concrete skeleton (C), the thickness of the anchor mortar outer wall (M) changes to the required thickness (W). Even if there is, there is always an opening part of the split groove (18) toward the mutual gap (floating margin part of the mortar outer wall) (S) between the mortar outer wall (M) and the concrete skeleton (C). The opening length (L2) of the split groove (18) is dimensioned to be as long as possible so that the groove is exposed, and the slit is cut up to the tip of the anchor body (11).

In that case, as long as a plurality of the dividing grooves (18) are arranged in an array in a radial symmetrical distribution, the number of the dividing grooves may be increased and arranged in a so-called plus type or cross-shaped type. Although it can not be used, due to the correlation with the thickness of the anchor body (11) and the opening length (L 2) of the split groove (18) thereof, in order to prevent the strength from decreasing, a pair as shown in the figure, It is desirable to arrange them in the minus type or single letter type.

Further, (19) is a plug receiving step surface which is continuously and integrally projected from the tip portion of the anchor body (11), and the wall thickness dimension of the anchor body (11) is extended to the tip portion. Prevent the plug (12) from falling off from the tip of the anchor body (11) by making the anchor body (11) narrower in diameter as it becomes uneven as a stepped or tapered shape that gradually becomes thicker. I take it.

When the plug (12) inserted into the hollow inside of the anchor body (11) in a receiving state is tapped, the anchor body (11) cooperates with the split groove (18), It expands and deforms smoothly from the tip, and it is fixed to the concrete skeleton (C) by irremovably biting.

Next, FIGS. 6 to 11 show a modified embodiment of the anchor pin (P), in which the anchor body (11) is press-worked with a stainless steel pipe so that its proximal end portion has a nozzle receiving port cylinder. The outwardly protruding claw ring (20) which also bites and acts on the concrete skeleton (C) at the tip end while forming (13) overhanging, and the inward tapering inclined step surface (19) for receiving the plug (12). And are modeling.

Since the other configurations of this modified embodiment are substantially the same as those of the basic embodiment shown in FIGS. 1 to 5, the reference numerals corresponding to those of FIGS. However, detailed description thereof will be omitted.

When the mortar outer wall (M) is repaired using the anchor pin (P) of the present invention configured as described above, the work is performed according to the following process sequence.

That is, FIG. 12 shows a standard unit grid preliminarily marked on the outer wall (M) of the mortar of a building. First, as shown in FIG. 13, for each of the floating portions (a). Using a drilling tool (21) such as a vibrating drill, an anchor pin driving hole (16) having a constant depth that reaches the concrete body (C) from the outer wall (M) of the mortar is opened. Since the driving hole (16) receives the anchor body (11) of the anchor pin (P), it goes without saying that it has a stepped opening configuration corresponding to the anchor body (11) as suggested in FIG. ..

Then, as shown in FIG. 15, the anchor body (11) of the anchor pin (P) is driven into the driving hole (16), and the plug () inserted into the anchor body (11) is inserted. 12) is hammered with a hammering tool (22) such as a hammer or a hammer.

By doing so, the anchor body (11) expands and deforms from its tip portion, and bites into the driving hole (16) of the concrete skeleton (C) so as to be irremovably fixed. Similarly, the nozzle receiving port cylinder (13) at the base end of the anchor body (11) is exposed from the surface of the mortar outer wall (M), and the mortar outer wall (M) and the concrete skeleton (C) are exposed. The split groove (18) of the anchor body (11) is also positioned toward the mutual gap (S).

Then, as is clear from FIG. 16, next, an adhesive injection nozzle (15) is directly inserted into the nozzle receiving port cylinder (13) of the anchor body (11) or indirectly through an adapter. The adhesive (B) such as a wet-curing type epoxy resin or polymer cement slurry is injected and filled into the hollow inside of the anchor body (11) in a pressurized state.

Then, as shown in FIGS. 16 and 17, the adhesive (B) passes through the split groove (18) opening in the reference body surface of the anchor body (11) and the body surface and the driving hole (16). ) And the mutual gap (S) between the outer wall (M) of the mortar and the concrete skeleton (C).

As a result, the anchor pin (P) previously fixed to the concrete skeleton (C) is more strongly fixed by the adhesive (B), and the anchor pin (P) is bonded to such anchor pin (P). Due to the synergistic action with the agent (B), the outer wall (M) of the mortar is not strongly lifted up or peeled off from the concrete skeleton (C), and is remarkably strongly bonded and integrated with the concrete skeleton (C). ..

In that case, since the adhesive (B) is injected from the nozzle (15) into the hollow inside of the anchor body (11) under a pressurized state by a manual pump or the like, the internal pressure of the adhesive (B) is increased. The received adhesive (B) tries to flow back to the surface of the mortar outer wall (M) along the mutual gap (G) between the body surface of the anchor body (11) and the driving hole (16). An acting force acts to bend and deform the outer wall (M) in a floating shape.

However, in the anchor pin (P) of the present invention, the nozzle receiving port cylinder (13) is projected at the proximal end of the anchor body (11), and the nozzle receiving port cylinder (13) and the reference cylinder The boundary step with the surface is set as a restraining shoulder surface (14) for preventing backflow of the adhesive (B) and for preventing rising of the mortar outer wall (M). Combined with the fact that the anchor pin (P) itself is made of a metal material that can counteract the action force and does not rust, there is no concern that the surface of the outer wall (M) of the mortar will be unsightly and soiled by the overflowing adhesive (B). Moreover, the durability strength of the outer wall (M) of the mortar can be remarkably improved.

Further, since the outer wall (M) of the mortar is not flexibly deformed (raising phenomenon) in a floating manner, an adhesive (B) such as polymer cement slurry which requires a relatively high injection pressure can be used without any restriction. In addition, it does not require care to adjust the injection pressure to a low level, and the spread area (Z) of the adhesive (B) can be expanded under a constantly high injection pressure. In that sense as well, it is possible to obtain high strength durability of the outer wall (M) of the mortar.

After the adhesive (B) is injected, the nozzle (15) is pulled out from the nozzle receiving port cylinder (13) of the anchor body (11), and the nozzle receiving port cylinder (13) is removed from the nozzle (15). Of course, a putty such as an epoxy mortar or the like having affinity with the adhesive (B) and a plug (23) are used to finish in a beautiful closed state.

[0035]

[Effect of the device]

 As described above, in the anchor pin (P) for repairing the outer wall of the building according to the present invention, the adhesive (B) is injected and guided to the floating portion (a) of the unit grid marked on the outer wall (M) of the mortar. , A hollow anchor main body (11) made of stainless steel or other non-rusting metal that is driven into the concrete skeleton (C) from the mortar outer wall (M) and the anchor main body (11) from the tip. The anchor body (11) is provided with a plug (12) of a steel ingot that is inserted into the hollow inside of the anchor body (11) in order to forcibly expand and deform and bite and fix it in the driving hole (16). ), The receiving port cylinder (13) of the adhesive injection nozzle (15) is projected to a diameter larger than the reference body surface of the anchor body (11), thereby Adhesive on the boundary step B) for preventing backflow and for preventing rising of the outer wall (M) of the mortar, it is determined to function as a shoulder surface (14), and the nozzle (15) is provided on the inner peripheral surface of the nozzle receiving mouth tube (13). A screw (17) that is detachably screwed is engraved, while the anchor main body (11) is expanded from the tip to almost the entire reference body surface excluding the nozzle receiving tube (13). Also, when the flow-through groove (18) for the adhesive (B) is driven and fixed to the concrete skeleton (C), a part of the opening thereof is a mutual gap between the mortar outer wall (M) and the concrete skeleton (C). Since the openings are arranged in a row of a constant length (L2) that is always faced to (S), there is an effect that the problems of the prior art mentioned at the beginning can be surely improved.

That is, according to the structure of the present invention, the receiving body (13) of the adhesive injection nozzle (15) is formed at the base end of the anchor body (11) so as to project from the anchor body (11). Since the boundary step of (11) with the reference body surface is set as a restraining shoulder surface (14) that helps prevent backflow of the adhesive (B) and lifting of the mortar outer wall (M), the nozzle ( The adhesive (B) injected into the hollow inside of the anchor main body (11) by 15) receives the internal pressure thereof and runs along the outer peripheral surface of the anchor main body (11) and overflows to the surface of the mortar outer wall (M). Even if the back wall of the mortar is attempted to flow back, or the outer wall (M) of the mortar is also flexed and deformed by the internal pressure so as to float up from the concrete skeleton (C), the restraining shoulder surface (14) opposes such an action force. hand There is no possibility of causing the above-mentioned backflow or flexural deformation.

As a result, the polymer cement which requires a relatively high injection pressure does not have to be adjusted to adjust the injection pressure of the adhesive (B) to a low level, as in the known device described at the beginning. The adhesive (B) such as a slurry can be used without any restriction, and the spread area (Z) of the adhesive (B) can be expanded under the high injection pressure.

The fact that the spread area (Z) for the injection unit amount of the adhesive (B) can be expanded means that the unit grid is rough and the required number of anchor pins (P) to be used for driving the floating portion (a) is the whole. Means that a small number is sufficient. Nevertheless, there is an effect that the binding force of the mortar outer wall (M) to the concrete skeleton (C) can be remarkably increased, and the mortar outer wall (M) is remarkably excellent in durability strength.

Further, a screw (17) is engraved on the inner peripheral surface of the nozzle receiving port cylinder (13), and the adhesive injection nozzle (15) is placed inside the nozzle receiving port cylinder (13) in a stable and firm communication connection state. Since the adhesive (B) is injected under the above high pressure, the adhesive (B) that has received the internal pressure as described above is received and held by the anchor body (11). Not only does not flow back along the outer peripheral surface of the anchor body (11), but also there is no risk of overflowing from the hollow inside of the anchor body (11) to the outside through the nozzle receiving port cylinder (13).

Therefore, in combination with the fact that the anchor body (11) is made of stainless steel or other metal material that does not rust, the surface of the outer wall (M) of the mortar is not unsightly and stains easily. It is possible to maintain a beautiful finish over a long period of time.

Furthermore, a split groove (for spreading the tip of the anchor body (11) and for distributing the adhesive (B) (almost all the length of the reference body surface of the anchor body (11)). 18) has an opening array, it is not necessary to additionally process and distribute the remaining adhesive flow holes, and the mass production effect can be expected to the maximum as an anchor pin (P) used in large quantities of this kind. In addition, even if the required thickness (W) of the temporary mortar outer wall (M) changes, the opening of the split groove (18) does not necessarily mean that the mortar outer wall (M) and the concrete skeleton are open. As a result of facing the mutual gap (S) with (C), the adhesive (B) can be smoothly spread to the mutual gap (S) at all times. It can be said that it is a device for practical use. .

[Brief description of drawings]

FIG. 1 is a side view showing a basic embodiment of an anchor pin according to the present invention.

FIG. 2 is a front view seen from the left in FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is an enlarged cross-sectional view taken along the line 4-4 of FIG.

5 is an enlarged cross-sectional view taken along line 5-5 of FIG.

FIG. 6 is a plan view showing a modified example of the anchor pin.

FIG. 7 is a side view of the same.

FIG. 8 is an enlarged front view of FIG.

9 is an enlarged rear view of FIG.

10 is a sectional view taken along line 10-10 of FIG.

11 is an enlarged cross-sectional view taken along line 11-11 of FIG.

FIG. 12 is an explanatory view that schematically shows the arrangement state of driving anchor pins as a unit grid.

FIG. 13 is a cross-sectional view showing a step of piercing an anchor pin driving hole.

FIG. 14 is a cross-sectional view showing a completed state of punching of the driving hole.

FIG. 15 is a cross-sectional view showing a step of driving the anchor pin into the anchor pin driving hole.

FIG. 16 is a cross-sectional view showing a step of injecting an adhesive agent into the anchor pin.

FIG. 17 is a cross-sectional view showing a state where injection of the adhesive is completed.

[Explanation of symbols]

 (11) · Anchor body (12) · Plug (13) · Nozzle receiving port cylinder (14) · Stop shoulder surface (15) · Adhesive injection nozzle (16) · Driving hole (17) · Screw (18) · Split groove (B) ··· Adhesive (C) · · Concrete skeleton (M) · · Mortar outer wall (P) · · Anchor pin (G) (S) · Mutual gap (Z) · · Spillover area (a) ·・ Floating part (L1) ・ Anchor pin length (L2) ・ Split groove opening length (θ) ・ ・ Crossing angle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Takizaki Ju 2-3-17 Nishitenma, Kita-ku, Osaka City, Osaka Prefecture KFC Co., Ltd. (72) Inventor, Ryoichi Hatano 1-chome, Uchisaiwaicho, Chiyoda-ku, Tokyo No. 6 Nihon Telegraph and Telephone Corporation (72) Inventor Yoshiro Hattori 3-6 Shinshinishi, Chikusa-ku, Nagoya-shi, Aichi Prefecture (72) Inventor Kazuo Yamada Tenma-dori, Chikusa-ku, Nagoya-shi, Aichi 1-chome 33 Ryowa Engineering Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A mortar outer wall (M) is used by being driven into a concrete skeleton (C) so as to inject and guide an adhesive (B) into a floating portion (a) of a unit grid marked on the mortar outer wall (M). A hollow anchor body (11) made of stainless steel or other metal that does not rust, and the anchor body (11) is forcibly expanded and deformed from the tip to bite and fix it in the driving hole (16). A steel ingot plug (12) inserted into the hollow inside of the anchor body (11), and a receiving port tube (13) of the adhesive injection nozzle (15) from the base end portion of the anchor body (11). ) Has a diameter larger than that of the reference body surface of the anchor body (11) to prevent the backflow of the adhesive (B) and the rise of the outer wall (M) of the mortar at the boundary step with the reference body surface. Prevention The nozzle (15) is defined so as to function as a restraining shoulder surface (14), and a screw (17) which is detachably screwed to the nozzle (15) is engraved on the inner peripheral surface of the nozzle receiving port cylinder (13). On the other hand, the nozzle receiving port cylinder (1) of the anchor body (11)
Except for 3), a split groove (18) for spreading from the tip end and for distributing the adhesive (B) is driven into and fixed to the concrete skeleton (C) on almost the entire reference body surface, and the opening thereof is fixed. Part of the building characterized by having openings arranged in a row with a certain length (L2) that will inevitably face the mutual gap (S) between the mortar outer wall (M) and the concrete skeleton (C) Anchor pin for outer wall repair.