JP2005023550A - Outer wall repairing anchor pin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outer wall repairing anchor pin for preventing from narrowing clearance generated between an outer wall finishing material layer and a concrete skeleton, before injecting an adhesive, when repairing an outer wall. <P>SOLUTION: This anchor pin is composed of a pin subject 10, a shaft body 20, and an expansively opening cone 30. The pin subject 10 forms a shaft body inserting port 11 for inserting a shaft body 20 on the base end, and forms a tip expansively opening part 12 on the tip. Recessed-projecting tooth bodies 15 and 22 are formed on an inner peripheral surface of the pin subject 10 and an outer peripheral surface of the shaft body 20. The adhesive is injected into a construction hole bored toward the concrete skeleton from the outer wall finishing material layer to be repaired, and the adhesive is injected into the clearance generated between the outer wall finishing material layer and the concrete skeleton. Next, the anchor pin is inserted into the construction hole, and the tip of the pin subject is expansively opened by the expansively opening cone by striking the shaft body. The anchor pin is fixed to the concrete skeleton, and the outer wall finishing material layer is pressed and fixed by a base end diametrally expansive part of the shaft body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anchor pin for repairing an outer wall for repairing floating of an outer wall finishing material layer that becomes an outer wall such as mortar or tile applied on the surface of a concrete frame.
[0002]
[Prior art]
When the outer wall finishing material layer applied on the surface of the concrete frame peels off from the concrete frame and floats (gap), if left untreated, the outer wall finishing material layer may eventually fall off the surface of the frame . Conventionally, an adhesive such as an epoxy resin has been injected into the gap between the outer wall finishing material layer and the concrete frame to prevent the peeling from progressing, and the work to avoid the risk of the outer wall finishing material layer falling off the surface of the frame has been made. An anchor pin for injecting the agent has also been developed.
[0003]
In the past, repair work on the outer wall using anchor pins has been done by drilling a hole from the outer wall toward the concrete frame and injecting an adhesive such as epoxy resin into the hole to put the adhesive in the gap between the hole and the outer wall and the frame. Then, all the screw bolts were inserted into the construction holes into which the adhesive was injected, and when the adhesive was cured, the outer wall and the casing were fixed. Usually, the epoxy resin used in these constructions is a two-component mixed type, so if the adhesive does not harden due to a mixing error, etc., it is because the outer wall and the casing are not mechanically fixed. There was a problem that the peeling proceeded again from the bonded portion.
[0004]
In order to solve the above problems, the anchor pin inserted into the construction hole drilled in the concrete frame from the outer wall is formed in a tubular shape, and at the same time, the anchor pin has an expanded structure at the distal end and a cone shape at the proximal end. It was supposed to be. The anchor pin was first driven into the construction hole drilled from the outer wall toward the concrete frame, and the epoxy resin was injected into the construction hole and the gap through the pipe of the anchor pin that was driven. In this construction, the anchor pin mechanically fixes the outer wall and the frame, so the above-mentioned problems have been solved, and this construction method is mainly used in recent outer wall repair work.
[0005]
However, since the anchor pin formed in a tubular shape receives the reaction force of the force for driving the pin at the base end portion of the pin, the cone-shaped portion that becomes the base end portion presses the outer wall when the pin is driven. It was found that the gap between the concrete frame and the concrete was narrowed. For this reason, the injection | pouring state of the epoxy resin performed after driving | running | working an anchor pin is not favorable, and the new problem that the quantity of resin required for repair cannot be inject | poured into the clearance gap between an outer wall and a housing has arisen.
[0006]
[Patent Document 1]
Japanese Utility Model Publication No. 60-123415 [0007]
The device described in Patent Document 1 shows the state of repair work in FIG. 6, but the repair pin 1 is inserted into the prepared hole 22 formed in the concrete frame 21 from the mortar outer wall 20 (FIG. 6). A) The tip of the repair pin 1 is expanded using the driving rod 9 and is fixed to the housing (FIG. 6B). At this time, the driving rod 9 is the base of the repair pin 1 Since the end is struck, the base end portion of the repair pin 1 may press the mortar outer wall 20 against the housing 21, and the mortar outer wall 20 may narrow the gap 23 between the concrete housing 21.
[0008]
As described above, since the outer wall repair work is to inject an adhesive into the gap 23 formed between the mortar outer wall 20 and the concrete casing 21, the gap 23 was narrowed before the injection of the adhesive. The amount of adhesive necessary for repair cannot be injected into the gap 23. That is, if the required amount of adhesive cannot be injected into the gap where peeling occurs, the outer wall and the concrete frame cannot be attached by the adhesive. On the other hand, depending on the thickness of the outer wall finishing material such as mortar outer walls and tiles (depth of construction holes), it is necessary to prepare an anchor pin with a suitable length each time, which requires extra labor and cost. There was a problem.
[0009]
[Problems to be solved by the invention]
The problem to be solved by the present invention is that when repairing an outer wall finishing material layer, an adhesive is injected into a construction hole formed in the concrete frame from the outer wall finishing material layer, and then a repair anchor pin is driven. It provides an anchor pin for repairing the outer wall so that the gap required between the outer wall finishing material layer and the concrete frame is not narrowed before the agent is injected, and the amount of adhesive necessary for repair can be injected. is there.
[0010]
[Means for Solving the Problems]
The first of the solving means is that the anchor pin is composed of a pin main body, a shaft body, and an expanding cone, and the pin main body forms a shaft body insertion port for inserting the shaft body at a base end and a distal end expanding portion at a distal end. Forming a concave and convex tooth body on the inner peripheral surface of the pin main body and the outer peripheral surface of the shaft body, and injecting an adhesive into a construction hole drilled from the outer wall finishing material layer to be repaired toward the concrete frame After injecting the adhesive into the gap formed between the outer wall finishing material layer and the concrete frame, the anchor pin is inserted into the construction hole, the shaft is struck, and the tip of the pin main body is struck by the expanding cone. The outer wall finishing material layer is pressed and fixed by the base end enlarged diameter portion of the shaft body.
According to a second aspect of the present invention, the uneven tooth body formed on the inner peripheral surface of the pin main body and the outer peripheral surface of the shaft body is a ratchet type tooth body.
According to a third aspect of the present invention, the uneven tooth body formed on the inner peripheral surface of the pin main body and the outer peripheral surface of the shaft body has a screw shape.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an anchor pin for repairing an outer wall according to the present invention, FIG. 2 shows an anchor pin for repairing an outer wall according to another embodiment, FIG. 3 shows a construction procedure of the anchor pin for repairing an outer wall, and FIG. It is the figure which compared the length of the whole anchor pin in time.
[0012]
In FIG. 1, the anchor pin 1 includes a pin main body 10, a shaft body 20, and an expanding cone 30. The pin main body 10 is formed by bending a plate material into a pipe shape, or formed from a pipe material, but in the embodiment, the plate material is bent into a pipe shape. The pin main body 10 is formed in the shaft body insertion port 11 for inserting the shaft body 20 at the base end, and the tip is formed in the tip widening portion 12.
[0013]
The tip widening portion 12 of the pin main body 10 is formed to have a length of about one third of the total length of the pin main body from the tip of the pin, and a slit 13 is formed from the tip toward the center of the pin. There are three slits 13, one is a joint between the plate materials when the plate material is bent into a pipe shape, and the other two are formed at 120 ° phase positions. Each slit 13 is formed with a small hole 14 at the slit end portion in order to regulate the expansion angle of the tip widening portion 12.
[0014]
In addition, the pin main body 10 has a concavo-convex internal tooth body 15 formed on the inner peripheral surface of the remaining portion of the pipe where the tip widening portion 12 is formed. In the embodiment, the concavo-convex shaped internal tooth body 15 is a ratchet type tooth body.
[0015]
The shaft body 20 has a proximal end diameter-enlarged portion 21 having a shape corresponding to the head portion of a countersunk screw at the proximal end, and the shaft portion is a concave-convex shaped internal tooth 15 formed on the inner peripheral surface of the pin main body 10. The concavo-convex shaped external tooth body 22 having the same shape as that in FIG. In the embodiment, the concavo-convex external tooth body 22 is a ratchet type tooth body. Further, the shaft body 20 is formed slightly longer than the length of the concavo-convex shape internal tooth body 15 of the pin main body 10.
[0016]
30 is an expanding cone to be attached to the tip expanding portion 12 of the pin main body 10, and is formed integrally with a shaft portion 31 and a cone nut 32 having substantially the same diameter as the inner periphery of the tip expanding portion 12. The shaft portion 31 is attached to the tip widening portion 12 of the pin main body 10.
[0017]
In the embodiment, both the concave and convex internal teeth 115 formed on the inner peripheral surface of the pin main body 10 and the concave and convex external teeth 22 formed on the shaft portion of the shaft body 20 are similar to the ratchet tooth shape. The reason is that when the two are joined, they are not separated from each other in the pulling direction. If the joined state can be ensured, as shown in FIG. The body 22a may have a screw shape.
[0018]
In FIG. 3, 40 is a concrete frame, 41 is an outer wall finishing material layer made of mortar or tile formed on the surface of the concrete frame 40, and 42 is a gap (floating) generated between the concrete frame 40 and the finishing material layer 41. Yes, the procedure for repairing the outer wall will be described below with reference to FIG.
[0019]
First, a construction hole 43 is made from the outer wall finishing material layer 41 toward the concrete housing 40 in a gap 42 generated between the concrete housing 40 and the outer wall finishing material layer 41. Next, an adhesive 50 made of epoxy resin or the like is injected into the construction hole 43, and the adhesive 50 is injected not only into the construction hole 43 but also into the gap between the concrete housing 40 and the outer wall finishing material layer 41 (FIG. 3A).
[0020]
Next, the anchor pin 1 is inserted into the construction hole 43 into which the adhesive 50 has been injected. The anchor pin 1 has the shaft body 20 inserted in advance from the proximal end of the pin main body 10 and an expanded cone at the distal end. 30 is attached. The assembled anchor pin 1 is inserted until the expanded cone 30 reaches the bottom of the construction hole 43 until the expanded cone 30 reaches the bottom of the construction hole 43 (FIG. 3B).
[0021]
Subsequently, the shaft body 20 of the anchor pin 1 protruding from the outer wall finishing material layer 41 is hit. As a result, the shaft body 20 enters the pin main body 10, the pin main body 10 itself enters toward the back of the construction hole 43, and the tip of the expanding cone 30 that has already reached the bottom of the construction hole 43. It rides on the corn nut 32 and the tip widening portion 12 is widened and fixed to the concrete frame 40. The shaft body 20 continues to be driven until it reaches the same position as the surface of the outer wall finishing material layer 41, and the construction work is completed when the proximal diameter enlarged portion 21 is flush with the surface of the outer wall finishing material layer 41 (FIG. 3C).
[0022]
In the anchor pin thus constructed, the base end enlarged portion 21 of the shaft body 20 presses the outer wall finishing material layer 41, and the tip widened portion 12 is fixed to the concrete frame 40 with the widened cone 30. The anchor pin 1 is mechanically coupled to the outer wall finishing material layer 41 and the concrete frame 40. At this time, since the shaft body 20 and the pin main body 10 are engaged with the concavo-convex shape external tooth body 22 and the concavo-convex shape internal tooth body 15, respectively, the resistance force is high in the tensile direction of both, It does not leave easily. Further, since the adhesive 50 is injected into the gap 42 between the concrete frame 40 and the outer wall finishing material layer 41 before the anchor pin 1 is driven into the construction hole 43, an amount of the adhesive 50 necessary for repairing is injected. The deficiencies in construction due to the lack of adhesive are eliminated.
[0023]
FIG. 4 shows a state in which the length of the entire anchor pin is compared when the construction of the anchor pin is completed, and shows a state in which construction is completed by inserting the shaft body 20 into the pin main body 10 for both A and B. Yes. In the outer wall repair work, the depth of the construction hole 43 in the concrete frame 40 is required to be a certain level or more. For this reason, it is necessary to prepare anchor pins having different lengths of the entire anchor pin, particularly the pin main body, depending on whether the outer wall finishing material layer to be repaired is thick or thin when repairing the outer wall.
[0024]
Since the anchor pin of the embodiment is configured such that the shaft body 20 is inserted into the pin main body 10, the pin main body 10 and the shaft body 20 can be used as common parts, and therefore the thickness of the outer wall finishing material layer 41 is different. Even so, one type of repair work can be performed.
[0025]
【The invention's effect】
The present invention is for injecting an adhesive into a construction hole drilled in a concrete frame from an outer wall finishing material layer and then driving in an anchor pin for repair, and before the injection of the adhesive, the outer wall finishing material layer and the concrete frame Since the gap generated between the outer wall and the housing can be injected into the gap between the outer wall finishing layer and the housing, and the finishing layer and the housing can be mechanically fixed. Even if the agent is not cured for some reason, it can be prevented from peeling again from the bonded portion.
[0026]
According to the present invention, the anchor pin can be reliably constructed according to the depth of the construction hole by the function of the concave and convex tooth bodies formed on the pin main body and the shaft body. In addition, since the expansion part is expanded with the anchor pin reaching the bottom of the construction hole, the anchor pin embedding depth necessary for the concrete frame can be secured, and the reliability and safety of the repair work can be improved. It can be done.
[Brief description of the drawings]
FIG. 1 shows an anchor pin for repairing an outer wall, wherein A is a partial sectional view of the whole, and B is a component diagram.
FIG. 2 is a partial cross-sectional view showing an anchor pin for repairing an outer wall according to another embodiment.
FIG. 3 is a cross-sectional view showing a procedure of construction work.
FIG. 4 is a partial cross-sectional view showing each anchor pin in which the lengths of the entire outer wall repair anchor pins are compared when construction is completed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Anchor pin 10 Pin main body 11 Shaft body insertion port 12 Tip widening part 13 Slit 14 Small hole 15 Concave-shaped internal tooth body 20 Shaft body 21 Base end enlarged diameter part 22 Concave-shaped external tooth body 30 Widening cone 31 Shaft part 32 Cone nut 40 Concrete frame 41 Finishing material layer 42 Gap 43 Construction hole 50 Adhesive

Claims (3)

The anchor pin is composed of a pin main body (10), a shaft body (20), and an expanding cone (30). The pin main body forms a shaft body insertion port into which the shaft body is inserted at the base end, and the distal end expands at the distal end. An opening is formed, and concave and convex teeth (15, 22) are formed on the inner peripheral surface of the pin main body and the outer peripheral surface of the shaft body, and a construction hole is drilled from the outer wall finishing material layer to be repaired toward the concrete frame After injecting an adhesive into the gap between the outer wall finishing material layer and the concrete frame, the anchor pin is inserted into the construction hole, and the shaft is struck to expand the expansion. An anchor pin for repairing an outer wall characterized in that the tip of the pin main body is expanded by a cone and fixed to a concrete frame, and an outer wall finishing material layer is pressed and fixed by a base end enlarged diameter portion of the shaft. 2. The outer wall according to claim 1, wherein the uneven tooth bodies (15, 22) formed on the inner peripheral surface of the pin main body (10) and the outer peripheral surface of the shaft body (20) are ratchet type tooth bodies. Anchor pin for repair. 2. The outer wall repairing device according to claim 1, wherein the concave and convex tooth bodies (15, 22) formed on the inner peripheral surface of the pin main body (10) and the outer peripheral surface of the shaft body (20) are screw-shaped. Anchor pin.

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