JP3874414B2 - Anchor pin for exterior wall repair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outer wall repair anchor pin that repairs floating of an outer wall represented by mortar or the like constructed on the surface of a concrete frame to prevent the outer wall from peeling off.
[0002]
[Prior art]
If the outer wall of the mortar constructed on the surface of the concrete frame peels off from the concrete frame and a float (gap) occurs, there is a risk that it will eventually fall off the concrete frame, so inject an adhesive such as epoxy resin into this gap. Both are fixed and repaired. For this purpose, various repair anchor pins are used. The anchor pin for repairing the outer wall has a hollow shape and is provided with an expanded structure at the tip. The anchor pin is driven into the construction hole drilled in the concrete frame from the outer wall of the mortar and fixed to the concrete frame by expanding the expanded structure. To do.
[0003]
Anchor pins that have been driven into the concrete frame are injected with an adhesive such as epoxy resin inside the pin, and the adhesive is filled into the gap between the hole in the anchor pin body from the hollow of the anchor pin body and the outer wall of the mortar and the concrete frame, The mortar outer wall is prevented from peeling off by the adhesive strength of the adhesive and the anchoring strength of the anchor pin.
[0004]
An example of an anchor pin in the prior art is that in which a widened portion in which a widened plug is inserted is provided inside the tip end of a cylindrical pin body, and a flange perpendicular to the longitudinal direction of the pin body is provided at the base end. is there.
[0005]
[Patent Document 1]
Japanese Patent No. 2999832 [0006]
The anchor pins proposed in Patent Document 1 are a first type anchor pin shown in FIG. 1 and a second type anchor pin shown in FIG.
[0007]
The first type of anchor pin is provided with a flange-shaped base 17 at the base end of a pin body 10 formed in a hollow structure, an uneven ridge 18 for expansion at the tip, and an expansion plug in the pin body 10 11, and adhesive outlet holes 20 and 21 are provided in the intermediate part of the pin body 10. The first type of anchor pin is characterized by the structure of the base 17, but since the base 17 protrudes in a flange shape at the base end of the pin body 10, the outer wall surface portion is a stepped hole when the anchor pin is installed. It is a condition to make a construction hole to become.
[0008]
In order to form a stepped hole in the outer wall of the mortar, it is necessary to use a special stepped drill for drilling a stepped hole instead of a normal straight drill. Patent Document 1 shows a dedicated drill for making a stepped hole in FIG. 27, but the dedicated drill is more expensive than a commercially available straight drill, but expensive for making a stepped hole. At present, special drills must be used.
[0009]
The second type anchor pin has the first type structure, and is further provided with a ring-shaped backflow prevention valve 39 having a diameter larger than that of the base 17 at the base 17 portion.
[0010]
The above-described backflow prevention valve 39 can prevent the adhesive supplied into the pin body at the time of construction from leaking from the clearance of the construction hole to the surface of the mortar outer wall, but the backflow prevention valve 39 is also mounted here. For this, a stepped hole is required. However, as described above, the cost increases because the stepped hole is formed.
[0011]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide an anchor pin for repairing an outer wall that can be applied to a straight hole formed in an outer wall such as mortar and prevents the adhesive from leaking when the adhesive is injected. It is.
[0012]
[Means for Solving the Problems]
According to a first aspect of the present invention, the anchor pin is formed in a tubular shape, and the anchor pin forms a flange-like blade body projecting in a direction orthogonal to the axis at the base end edge, and the base end portion A funnel-shaped resin coated with a resin in a cross-sectional funnel shape is provided on the outer peripheral surface to form an adhesive injection portion, an expansion means is provided at the tip, and an anchor body is formed between the adhesive injection portion and the expansion means. A guide cylinder is fitted to the inner periphery of the base end of the anchor pin.
According to a second aspect of the present invention, the anchor pin is formed in a tubular shape, and the anchor pin forms a flange-like blade body projecting in a direction orthogonal to the axial center at the proximal end edge, and the proximal end of the proximal end is formed. A funnel-shaped resin coated with a resin in a cross-sectional funnel shape is provided on the outer peripheral surface to form an adhesive injection portion, an expansion means is provided at the tip, and an anchor body is formed between the adhesive injection portion and the expansion means. A through hole is provided in the vicinity of the base end portion of the anchor pin, and the resin in which the funnel-shaped resin is formed covers the inner peripheral surface of the anchor pin through the through hole, and the outer periphery sandwiching the anchor pin. A film and an inner peripheral film are integrally formed.
The third of the solving means is the first or second of the solving means, wherein the maximum outer diameter of the funnel-shaped resin formed on the outer peripheral surface of the anchor pin base end portion is the same as or slightly smaller than the outer diameter of the flange-shaped blade body. It is what.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
1 is a half sectional outline view in front view showing an embodiment of an anchor pin according to the present invention, FIG. 2 is an anchor pin of FIG. 1, a is a front view, b is a rear view, and FIG. 3 is a component diagram of the anchor pin. A is a main body of the anchor pin, b is a guide cylinder, FIG. 4 shows another embodiment of the anchor pin, a is a cross-sectional view of the anchor pin, and b is a cross section of the base end. FIG. 5 and FIG. 5 are sectional views showing the construction state of the anchor pin.
[0014]
In the figure, an anchor pin 1 is formed by bending a plate material into a pipe shape, formed from a pipe material, a cylindrical member provided with a hollow hole penetrating in the axial direction, and formed into a tubular shape. The adhesive injection portion 2 is provided, the expansion means 3 is provided at the tip, and the anchor body 4 is formed between the adhesive injection portion 2 and the expansion means 3. A plurality of adhesive spouts 5 are formed in the anchor body 4 of the anchor pin 1, and the expansion means 3 formed at the tip of the anchor pin 1 is provided with a slit 6 extending in the axial direction from the tip side. At the same time, a protruding portion 7 is formed that protrudes along the radial direction of the anchor pin 1 and toward the axial center. Reference numeral 8 denotes an expansion plug inserted into the anchor body 4. In the embodiment, two spouts 5 are provided in two positions in the axial direction at a phase of 180 degrees.
[0015]
The anchor pin according to claim 1 is formed with a flange-like blade body 10 projecting in a direction orthogonal to the axial center at the base end edge, and with the guide cylinder 11 fitted to the inner periphery of the base end. Further, a funnel-shaped resin 12 in which a resin is coated in a cross-sectional funnel shape is formed on the outer peripheral surface of the base end portion, and a portion including the funnel-shaped resin 12 is used as the adhesive injection portion 2. The guide cylinder 11 is made of metal or resin, and has a flange 11 a that engages with the base end edge of the anchor pin 1. Since the anchor tube is fitted with the guide cylinder 11 on the inner periphery of the base end portion, there is no gap on the contact surface with the injection nozzle of the adhesive injection machine, and the injection nozzle and the adhesive injection portion at the time of adhesive injection The liquid leakage from the contact surface 2 can be prevented.
[0016]
As shown in FIG. 4, the anchor pin according to claim 2 includes a plurality of funnel-shaped resins 12 provided on the outer peripheral surface of the base end portion of the anchor pin 1 in the vicinity of the base end portion along the circumferential direction. The hole 13 is filled to cover the inner peripheral surface of the base end portion, and the resin forming the funnel-shaped resin 12 is integrally formed with the outer peripheral film 12 a and the inner peripheral film 12 b sandwiching the anchor pin 1. Since the inner peripheral surface of the adhesive injection part 2 is formed with the inner peripheral film 12b of the funnel-shaped resin 12 and a perfect circle is secured, the injection nozzle of the adhesive injection machine and the injection of the adhesive at the time of injection of the adhesive There is no gap on the contact surface of the portion 2. Therefore, it is possible not only to prevent liquid leakage from the adhesive injection portion when the adhesive is injected, but also to prevent the funnel-shaped resin 12 from cracking when the anchor pin is driven. In the embodiment, four through-holes 13 are provided with a phase of 90 degrees in the circumferential direction.
[0017]
The anchor pin according to claim 3 is formed such that the maximum outer diameter of the funnel-shaped resin 12 formed at the proximal end portion of the anchor pin 1 is the same as or slightly smaller than the outer diameter of the flange-shaped blade body 10. It is. When the anchor pin is driven into the construction hole 20 formed in the outer wall of the mortar by forming the maximum outer diameter of the funnel-shaped resin 12 to be the same as or slightly smaller than the flange-shaped blade body 10, the funnel-shaped resin 12 Twelve resin films are pushed out toward the opening of the construction hole 20 to provide packing. The resin film is not peeled off and protrudes from the opening of the construction hole 20.
[0018]
In addition, when the opening of the construction hole 20 is not a perfect circle but a part of the opening is missing and is distorted, a gap is generated between the resin injection port 3 of the anchor pin and the hole wall surface of the construction hole 20. However, by further driving the anchor pin, the flange-shaped blade body 10 scrapes the wall surface near the opening of the construction hole 20 and inserts the anchor pin until it reaches the perfect circle part at the back of the construction hole 20, It is possible to prevent a gap from being generated between the adhesive injection part 2 and the construction hole 20.
[0019]
In FIG. 5, in order to repair the mortar outer wall 21, first, a construction hole 20 having a depth in which the anchor pin 1 can be inserted from the mortar outer wall 21 requiring repair toward the concrete housing 22 is formed. The anchor pin 1 is driven into the construction hole 20 so that the adhesive injection part 2 is located at the opening of the mortar outer wall. Next, using a driving rod (not shown), the expansion plug 17 of the anchor pin 1 is struck to expand the tip of the anchor pin 1, and the anchor pin 1 is fixed to the concrete housing 22.
[0020]
The dimensions of the anchor pin 1 and the hole diameter of the construction hole 20 in the embodiment were as follows. The anchor pin 1 is obtained by bending a plate material having a thickness of 0.8 mm into a pipe shape, the outer diameter of the anchor body 4 is 6.1 mm, the outer diameter of the flange-shaped blade 10 is 7.5 mm, and the adhesive injection portion 2. The inclination angle was 7.5 °, and the total length was 50 mm. A clearance of about 0.25 mm was secured between the peripheral surface of the construction hole 20 and the anchor pin 1 that was driven. That is, in the embodiment, the hole diameter of the construction hole 20 is set to 6.6 mm.
[0021]
An adhesive is injected from the adhesive injection portion 2 into the anchor pin 1 fixed to the mortar outer wall 21 and the concrete housing 22. The adhesive is poured out from the spout 5 of the anchor body 4 and filled into the gap between the anchor pin 1 and the construction hole 20 and also filled into the gap 23 between the mortar outer wall 21 and the concrete frame 22 to fix them together. As a result, the outer wall of the mortar that has a risk of peeling off due to a gap with the concrete housing 22 has been repaired.
[0022]
【The invention's effect】
Since the anchor pin of the present invention is formed with a flange-like blade body projecting in a direction orthogonal to the axis at the base end edge, the opening of the construction hole is not a perfect circle but a part of the opening. When the chip is in a chipped and distorted shape, the anchor pin is further driven, so that the flange-shaped blade body cuts the wall surface near the opening of the construction hole and reaches the perfect circle at the back of the construction hole. Until a gap is not generated between the adhesive injection part and the construction hole.
[0023]
In addition, since the anchor pin of the present invention has a cylindrical body fitted to the inner periphery of the base end portion of the anchor pin, a perfect circle is secured on the inner periphery of the adhesive injection portion, and the adhesive injection portion and the adhesive Since there is no gap on the contact surface with the injection nozzle of the injection machine, liquid leakage from the adhesive injection portion can be prevented when the adhesive is injected.
[0024]
In the anchor pin of the present invention, a funnel-shaped resin provided at the proximal end portion of the anchor pin is formed by integrally molding the outer peripheral coating and the inner peripheral coating through a through hole provided near the proximal end portion of the anchor pin. Therefore, a perfect circle is secured on the inner circumference of the adhesive injection part, and there is no gap on the contact surface with the injection nozzle when injecting the adhesive, and liquid leakage from the adhesive injection part is prevented when injecting the adhesive. It can be prevented.
[0025]
Furthermore, since the anchor pin of the present invention is formed with the maximum outer diameter of the funnel-shaped resin formed at the base end portion of the anchor pin being the same as or slightly smaller than the flange-shaped blade body, the anchor pin was driven into the construction hole. In some cases, the resin film of the funnel-shaped resin is pushed out toward the opening of the construction hole to exert a packing action, and it is possible to prevent the resin film from peeling off and protruding from the opening of the construction hole.
[Brief description of the drawings]
FIG. 1 is a half sectional outline view in front view showing an embodiment of an anchor pin according to the present invention.
2 is an anchor pin shown in FIG. 1, wherein a is a front view and b is a rear view. FIG.
3 is a component diagram of the anchor pin shown in FIG. 1, wherein a is a front view of the anchor pin main body, and b is a front view of the guide cylinder. FIG.
4 shows another embodiment of the anchor pin according to the present invention, in which a is a cross-sectional view of the base end portion of the anchor pin, and b is a cross-sectional view of the base end portion.
FIG. 5 is a cross-sectional view showing a construction state of an anchor pin according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Anchor pin 2 Adhesive injection part 3 Expansion means 4 Anchor body 5 Outlet hole 6 Slit 7 Projection part 8 Expansion plug 10 Flange-shaped blade body 11 Guide cylinder 12 Funnel-shaped resin 12a Outer peripheral film 12b Inner peripheral film 13 Through Hole 20 Construction hole 21 Mortar outer wall 22 Concrete frame 23 Crevice

Claims (3)

The anchor pin is formed in a tubular shape, and the anchor pin forms a flange-like blade body (10) projecting in a direction orthogonal to the axial center at the base end edge, and the base end is resin on the outer peripheral surface. Is formed in the adhesive injection part (2) by providing a funnel-shaped resin (12) coated in a funnel cross section, and provided with an expansion means (3) at the tip, and between the adhesive injection part and the expansion means. An anchor pin for repairing an outer wall, which is formed on an anchor body (4), and a guide cylinder (11) is fitted to the inner periphery of the proximal end portion of the anchor pin. The anchor pin is formed in a tubular shape, and the anchor pin forms a flange-like blade body (10) projecting in a direction perpendicular to the axis at the base end edge, and resin on the outer peripheral surface of the base end. Is formed in the adhesive injection part (2) by providing a funnel-shaped resin (12) coated in a funnel cross section, and provided with an expansion means (3) at the tip, and between the adhesive injection part and the expansion means. The anchor body (4) is formed on the anchor pin, a through hole (13) is provided in the vicinity of the proximal end of the anchor pin, and the resin having the funnel-shaped resin (12) is formed through the through hole. An outer wall anchor pin for repairing an outer wall, wherein the outer peripheral film and the inner peripheral film are integrally formed by covering the inner peripheral surface of the outer periphery and sandwiching the anchor pin. The maximum outer diameter of the funnel-shaped resin (12) formed on the outer peripheral surface of the base end portion of the anchor pin is the same as or slightly smaller than the outer diameter of the flange-shaped blade body (10). Or the anchor pin for outer wall repair of 2.

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