Anchor pins and pinning methods

Abstract

The objective is to provide an anchor pin and pinning method that can easily prevent the pin from coming out of the insertion hole. [Solution] The anchor has a shaft-shaped anchor body 10 that is inserted into an insertion hole 6 drilled in the building structure 3, and a shaft-shaped base end 20 provided on the base end side of the anchor body 10 and having a head 22. The anchor body 10 is formed in a spiral shape and has at least two first threads 11 that are wound around the outer circumferential surface of the anchor body 10. Each first thread 11 is arranged at equal intervals on the outer circumferential surface of the anchor body 10, and the outer diameter R11 of the first threads is larger than the inner diameter R6 of the insertion hole 6.

Description

Technical Field

[0001] The present invention relates to an anchor pin and a pinning method.

Background Art

[0002] The pinning method is used for the purpose of preventing peeling or flaking of the part where floating occurs in the finishing mortar or decorative agent on the outer wall (for example, Patent Document 1). The pinning method includes a drilling step of drilling an insertion hole in the body, a filling step of filling the insertion hole with an adhesive, and an insertion step of inserting an anchor pin into the insertion hole filled with the adhesive.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the anchor pin of Patent Document 1, when the anchor pin is inserted after filling the insertion hole with the adhesive, there is a problem that the anchor pin is pushed out to the outside and comes out due to the internal pressure of the adhesive before the adhesive dries. Although it is conceivable to adjust the amount of the adhesive so that the anchor pin is not pushed out, it is difficult to adjust the amount of the adhesive because the depth and size of the insertion hole vary depending on the site, and it becomes a very complicated operation. In addition, since there is also a method of press-filling and filling the adhesive into the internal voids, it is difficult to remove the internal pressure.

[0005] The present invention has been made to solve the above problems, and an object thereof is to provide an anchor pin and a pinning method that can easily prevent the anchor pin from coming out of the insertion hole.

Means for Solving the Problems

[0006] To solve the aforementioned problems, the anchor pin of the present invention comprises an axial anchor body portion inserted into an insertion hole drilled in a building structure, and an axial base end portion provided on the base end side of the anchor body portion and having a head, wherein the anchor body portion is formed in a spiral shape and has at least two first threads wound around the outer circumferential surface of the anchor body portion, each of the first threads being arranged at equal intervals on the outer circumferential surface of the anchor body portion, and the outer diameter of the first threads being larger than the inner diameter of the insertion hole.

[0007] According to the present invention, the anchor pin body is inserted into the insertion hole while the two first threads bite into the inner wall of the insertion hole. As a result, the threads are fitted into the inner wall of the insertion hole, making it difficult for the anchor pin to come out. In addition, adhesive enters the gap between the inner wall of the insertion hole and the first threads and hardens, which enhances the adhesive strength through an anchoring effect and prevents the anchor pin from coming out.

[0008] Furthermore, the anchor body is preferably formed in a spiral shape and includes at least two second threads wound around the outer circumferential surface of the anchor body, wherein each of the second threads is arranged at equal intervals on the outer circumferential surface of the anchor body, and the outer diameter of the second thread is smaller than the outer diameter of the first thread.

[0009] According to the present invention, when the anchor body is inserted, the second thread acts as a guide, preventing the anchor pin from being inserted at an angle. Furthermore, since the outer diameter of the second thread is smaller than the outer diameter of the first thread, the anchor pin can be inserted with less force.

[0010] Furthermore, it is preferable that the anchor body has the same number of first threads and second threads arranged at equal intervals from each other.

[0011] According to the present invention, anchor pins can be inserted stably with minimal force.

[0012] Furthermore, it is preferable that the base end portion is provided with rib portions that protrude radially outward along the circumferential direction of the outer surface.

[0013] According to the present invention, the rib portion acts as a lid for the insertion hole, reducing or eliminating the amount of adhesive that spills out to the outside.

[0014] Furthermore, it is preferable to have an adjustment section provided on the tip side of the anchor body, which is composed of multiple adjustment pieces connected together, wherein the adjustment piece comprises an adjustment piece body and a small-diameter portion provided at the base end of the adjustment piece body and having a smaller diameter than the adjustment piece body, and the length is adjusted by cutting the small-diameter portion.

[0015] According to the present invention, the length can be easily adjusted by separating the adjustment pieces. Furthermore, since a small diameter section is positioned between the adjustment pieces, it can be easily cut.

[0016] Furthermore, the adjustment piece body is preferably formed in a spiral shape and includes at least two first threads wound around the outer circumferential surface of the adjustment piece body, with each of the first threads arranged at equal intervals on the outer circumferential surface of the adjustment piece body, and the outer diameter of the first threads being larger than the inner diameter of the insertion hole.

[0017] According to the present invention, it is possible to further prevent the anchor pin from coming out even in the adjustment section.

[0018] Furthermore, the adjustment piece body is preferably formed in a spiral shape and includes at least two second threads wound around the outer circumferential surface of the adjustment piece body, wherein each of the second threads is arranged at equal intervals on the outer circumferential surface of the adjustment piece body, and the outer diameter of the second thread is smaller than the outer diameter of the first thread.

[0019] According to the present invention, anchor pins can be inserted stably with minimal force, even in the adjustment section.

[0020] In addition, the pinning method of the present invention includes a drilling step of drilling an insertion hole in the housing, a filling step of filling the insertion hole with an adhesive, and an insertion step of inserting the anchor pin into the insertion hole filled with the adhesive. In the insertion step, the anchor pin is inserted while causing the first thread of the anchor pin to bite into the inner wall of the insertion hole.

Advantages of the Invention

[0021] According to the present invention, it is possible to provide an anchor pin and a pinning method that can easily prevent the anchor pin from coming out of the insertion hole.

Brief Description of the Drawings

[0022] [Figure 1] In the first embodiment of the present invention, it is a side cross-sectional view showing a state where an anchor pin is inserted into an insertion hole. [Figure 2] It is a side view showing the anchor pin according to the first embodiment of the present invention. [Figure 3] It is a cross-sectional view showing the anchor pin according to the first embodiment of the present invention. [Figure 4] It is a cross-sectional view showing a wall body attached to the housing and an insertion hole. [Figure 5] It is a side view showing the anchor pin according to the second embodiment of the present invention. [Figure 6] It is a side view showing the anchor pin according to the third embodiment of the present invention.

Modes for Carrying Out the Invention

[0023] Hereinafter, an example of the anchor pin and the pinning method in the embodiment of the present invention will be described below with reference to the drawings. In each figure, up, down, left, right, front, and back are shown formally and do not indicate absolute directions. Also, in some configurations, a part may be exaggeratedly described.

[0024] <First Embodiment> As shown in Figures 1 and 2, the anchor pin 1 of this embodiment is a member for fixing the tile 5 to the building structure 3. The anchor pin 1 is made of metal (for example, stainless steel) and is integrally formed with an anchor body portion 10 and a base portion 20.

[0025] The anchor body portion 10 has a cylindrical (axial) shape. The diameter of the anchor body portion 10 is formed to be approximately 2-40% smaller than the inner diameter R6 of the insertion hole 6. Two first threads 11,11 and two second threads 12,12 are formed on the outer circumferential surface of the anchor body portion 10. The first threads 11 and the second threads 12 rise perpendicularly from the tangent to the anchor body portion 10 and have a rectangular plate-like cross-section. In addition, a reduced diameter portion 13 is formed at the tip of the anchor body portion 10, which narrows toward the tip.

[0026] As shown in Figure 2, the first thread 11 is spiral in shape and is wound around the outer circumferential surface of the anchor body 10 over its entire length. As shown in Figure 3, in a cross-sectional view, the first threads 11 are arranged at equal intervals (with a phase of 180 degrees in this embodiment). Here, the distance from the tip of one first thread 11 to the tip of the other first thread 11 is described as the outer diameter R11 of the first thread 11. The outer diameter R11 of the first thread 11 is formed to be slightly larger (about 2-15%) than the inner diameter R6 of the insertion hole 6. Note that it is sufficient to have two or more first threads 11.

[0027] As shown in Figure 2, the second thread 12 is spiral-shaped and is wound around the outer circumferential surface of the anchor body 10 over its entire longitudinal direction. As shown in Figure 3, the second threads 12 are arranged at equal intervals (with a phase of 180 degrees in this embodiment). The second threads 12 and the first threads 11 are formed at equal intervals on the outer circumferential surface of the anchor body 10. In other words, adjacent second threads 12 and first threads 11 are arranged alternately with a phase of 90 degrees. Here, the distance from the tip of one second thread 12 to the tip of the other second thread 12 is described as the outer diameter R12 of the second thread 12. The outer diameter R12 of the second thread 12 is formed to be slightly smaller (about 2-15%) than the outer diameter R11 of the first thread 11.

[0028] As shown in Figure 2, the reduced diameter portion 13 is a part of the anchor body portion 10 that narrows in diameter towards the tip. The reduced diameter portion 13 is formed to reduce friction when inserting the anchor body portion 10 into the insertion hole 6, making insertion easier. Note that the reduced diameter portion 13 may be omitted.

[0029] As shown in Figures 1 and 2, the base portion 20 is a part formed continuously with the base end of the anchor body 10. The base portion 20 comprises a base body 21, a head 22, and rib portions 23, 23. The base body 21 is a part continuous with the anchor body 10 and has a cylindrical (axial) shape. The outer diameter of the base body 21 is larger than the outer diameter of the anchor body 10 and is the same diameter as or slightly smaller than the inner diameter R6 of the insertion hole 6. A head 22 is formed at the base end of the base body 21, which is larger in diameter than the base body 21. Two rib portions 23 are formed on the outer circumferential surface of the base body 21 at predetermined intervals, protruding radially outward along the circumferential direction. The outer diameter of the rib portions 23 is formed to be slightly larger (about 2-15%) than the inner diameter R6.

[0030] [Pinning Method] Next, a pinning method using the anchor pin 1 described above will be explained. The pinning method according to this embodiment consists of a drilling step, a filling step, and an insertion step. The pinning method may be applied when forming a new tile structure or when repairing an existing tile structure. In this embodiment, an example is given of repairing an existing tile structure with new tiles.

[0031] As shown in Figure 4, a mortar layer 4 of a predetermined thickness is formed on the surface side of the structural frame 3. The wall 2 is composed of the mortar layer 4 and new tiles (exterior wall material, decorative material, etc.) 5. In the drilling process, an insertion hole 6 of a predetermined depth is formed using an electric drill (not shown) or the like, penetrating the structure 3, the mortar layer 4, and the new tile 5. The depth and outer diameter of the insertion hole 6 can be set as appropriate, but it is preferable that the depth of the insertion hole 6 is slightly longer than the total length of the anchor pin 1. In addition, a counterbore hole 6b is formed on the entrance side of the insertion hole 6. The counterbore hole 6b is formed to be larger in diameter than the inner diameter R6 of the insertion hole 6 and is the part that accommodates the head 22 of the base end 20 when the anchor body 10 is inserted. This makes it possible to make the surface of the tile 5 and the surface of the base end 20 (the surface of the head 22) flush. Note that the counterbore hole 6b may be omitted.

[0032] In the filling process, adhesive S (see Figure 1) is injected into the insertion hole 6 to spread the adhesive throughout the insertion hole 6.

[0033] In the insertion process, as shown in Figure 1, the anchor pin 1 is inserted all the way into the insertion hole 6. That is, the anchor pin 1 is hammered in from the base end with a hammer or the like until the head 22 abuts against the counterbore hole 6b. At this time, since the outer diameter R11 of the first thread 11 is larger than the inner diameter R6 of the insertion hole 6, the first thread 11 bites into the inner wall 6a of the insertion hole 6, and the anchor pin 1 is inserted.

[0034] Subsequently, as shown in Figure 1, the adhesive S hardens, forming a tile structure 100 in which the frame 3, mortar layer 4, and tile 5 are integrated.

[0035] The anchor pin 1 described above is equipped with at least two first threads 11, 11 formed in a spiral shape, and the outer diameter R11 of the first threads 11, 11 is larger than the inner diameter R6 of the insertion hole 6. Therefore, the anchor pin 1 is inserted into the insertion hole 6 while the two first threads 11, 11 bite into the inner wall 6a of the insertion hole 6. As the first threads 11 are fitted into the inner wall 6a of the insertion hole 6, the anchor pin 1 is made difficult to remove. In addition, the spiral shape of the first threads 11 and second threads 12 of the anchor pin 1 guides the adhesive S towards the tip, and the adhesive S fills the space between the inner wall 6a of the insertion hole 6 and the outer surface of the anchor body 10. In other words, the adhesive S enters the gap between the first threads 11 and second threads 12 and the outer surface of the anchor body 10 and hardens, so the adhesive strength can be increased by the anchoring effect, making it even more difficult for the anchor pin 1 to come loose. Furthermore, since the first threads 11, 11 are arranged at equal intervals, they can be inserted in a balanced manner without tilting.

[0036] Furthermore, the anchor body 10 is equipped with two spirally formed second threads 12, 12, and the outer diameter R12 of the second threads 12 is smaller than the outer diameter R11 of the first thread 11. As a result, when inserting the anchor body 10, the second threads 12 can act as a guide without biting into the inner wall 6a of the insertion hole 6. It is practically impossible to drive the anchor pin 1 in perfectly straight, and since the outer diameter R12 of the second threads 12 is slightly smaller than the outer diameter R11 of the first threads 11, when the anchor pin 1 is driven in, the tip of the second threads 12 will hit (guide) the inner wall 6a of the insertion hole 6 as it goes in. Also, since the second threads 12, 12 are arranged at equal intervals, insertion can be performed with better balance without tilting. Furthermore, since the first threads 11, 11 and the second threads 12, 12 are arranged at equal intervals of 90 degrees, insertion can be performed with better balance without tilting.

[0037] Furthermore, the anchor body 10 has an equal number of first threads 11 and second threads 12 arranged at equal intervals from each other. Therefore, the anchor pin 1 can be inserted stably with little force.

[0038] Furthermore, while increasing only the number of first threads 11 increases the press-fitting resistance, using a pair of first threads 11 and a pair of second threads 12 ensures both pull-out resistance and ease of insertion. As a result, it can be inserted even with a lightweight hammer such as a plastic or rubber hammer, thus reducing noise.

[0039] Furthermore, the base end portion 20 is provided with a rib portion 23 that extends radially outward along the circumferential direction of the outer surface. The rib portion 23 functions as a cover for the insertion hole 6, thereby reducing or eliminating the amount of adhesive that overflows from the insertion hole 6.

[0040] Furthermore, the pinning method using the anchor pin 1 involves a drilling process, a filling process, and an insertion process. In the insertion process, the first thread 11 is driven into the inner wall 6a of the insertion hole 6 while the anchor pin 1 is inserted, making it difficult for the anchor pin 1 to come loose.

[0041] <Second Embodiment> Next, a second embodiment of the present invention will be described with reference to Figure 5. The anchor pin 1A according to this embodiment differs from the first embodiment in that an adjustment portion 30A is provided at the tip of the anchor body portion 10. In other words, the anchor pin 1A is integrally formed comprising the anchor body portion 10, the base portion 20, and the adjustment portion 30A. The anchor body portion 10 and the base portion 20 are the same as in the first embodiment, so their description will be omitted.

[0042] As shown in Figure 5, an adjustment section 30A is formed at the tip of the anchor body 10. The adjustment section 30A is formed of a plurality of adjustment pieces 31. In this embodiment, the adjustment section 30A is made of metal (for example, stainless steel) and is composed of three adjustment pieces 31 connected together.

[0043] The adjustment piece 31 comprises an adjustment piece body 32, first threads 11, 11, second threads 12, 12, a small diameter portion 33, and a reduced diameter portion 34. The adjustment piece body 32 is axial (cylindrical) and coaxial and the same diameter as the anchor body 10. Two first threads 11 and two second threads 12, the same as those on the anchor body 10, are formed on the outer circumferential surface of the adjustment piece body 32. A small diameter portion 33, smaller in diameter than the adjustment piece body 32, is formed on the base end side of the adjustment piece body 32. The small diameter portion 33 is formed between adjacent adjustment piece body portions 32, 32, or between the reduced diameter portion 13 of the anchor body 10 and the adjustment piece body 32. The small diameter portion 33 can be separated from the adjustment piece 31 or the anchor body 10 by cutting this portion.

[0044] The reduced diameter portion 34 is formed at the tip of the adjustment piece body portion 32 and is a part that narrows in diameter towards the tip. The reduced diameter portion 34 narrows towards the tip to facilitate insertion when inserting the anchor body portion 10 into the insertion hole 6. In other words, no matter which small diameter portion 33 is used for cutting, the reduced diameter portion 34 will be located at the tip. Note that the reduced diameter portion 34 may be omitted.

[0045] The total length of the adjustment piece 31 can be set as appropriate, but for example, it is set to approximately 10 mm. In other words, when three contact pieces are connected, the adjustment section 30A is approximately 30 mm long. For example, if the total length of the anchor pin 1 in the first embodiment is approximately 40 mm, the maximum length of the anchor pin 1A is approximately 70 mm, and it can be adjusted to lengths of 60 mm, 50 mm, or 40 mm by cutting it at any small diameter section 33. Note that there may be one or two adjustment pieces 31, or four or more may be provided.

[0046] The anchor pin 1A described above can achieve the same effects as the first embodiment. The anchor pin 1A also includes an adjustment section 30A formed by multiple adjustment pieces 31. The length of the adjustment section 30A can be adjusted by cutting and separating the adjustment pieces 31 at the small-diameter portion 33, thus accommodating various depths of insertion holes 6. Furthermore, since the small-diameter portion 33 has a smaller diameter than the adjustment piece body portion 32 (anchor body portion 10), it is easier to cut. In addition, by making the adjustment piece 31 approximately 10 mm long, the length after cutting can be easily determined.

[0047] Furthermore, by providing the first thread 11 and the second thread 12 on the outer surface of the adjustment section 30A, the pull-out resistance can be further increased.

[0048] Furthermore, the adjustment piece body 32 is formed in a spiral shape and includes at least two second threads 12 wound around the outer circumferential surface of the adjustment piece body 32. Each of these second threads 12 is arranged at equal intervals on the outer circumferential surface of the adjustment piece body 32, and the outer diameter of each second thread 12 is smaller than the outer diameter of the first thread 11. Therefore, the adjustment piece 30A can achieve the same effect as the anchor body 10. In other words, the adjustment piece 30A can be inserted stably with little force.

[0049] <Third Embodiment> Next, the anchor pin 1B according to the third embodiment of the present invention will be described with reference to Figure 6. The anchor pin 1B according to this embodiment differs from that of the second embodiment in the shape of the adjustment piece. That is, the anchor pin 1B is integrally formed comprising an anchor body portion 10B, a base end portion 20, and an adjustment portion 30B.

[0050] The anchor body portion 10B has first threads 11 and second threads 12 that are shorter than the length of the anchor body portion 10B. The adjustment portion 30B is formed of a plurality of adjustment pieces 31. The adjustment portion 30B in this embodiment is made of metal (for example, stainless steel) and is composed of three adjustment pieces 31 connected together.

[0051] The adjustment piece 31 comprises an adjustment piece body portion 32 and a small diameter portion 33. The small diameter portion 33 is formed at the base end of the adjustment piece body portion 32. A reduced diameter portion 34 is formed at the tip of the adjustment piece 31. The adjustment piece 31 of this embodiment differs from the second embodiment in that it does not have a first thread 11 and a second thread 12.

[0052] The anchor pin 1B described above can achieve the same effects as those of the first and second embodiments. In this embodiment, the length can be adjusted by cutting the small-diameter portion 33. Also, since the adjustment piece 31 does not have a helical thread, the anchor pin 1B can be inserted into the insertion hole 6 with little force. Furthermore, the first thread 11 and the second thread 12 may be made shorter than the total length of the anchor body portion 10B. This makes it easier to insert the anchor pin 1B.

[0053] While embodiments of the present invention have been described above, the design can be modified as appropriate without violating the spirit of the invention. For example, three or more first threads may be arranged at equal intervals on the anchor body, or the second thread may be omitted. Furthermore, although the example shows the first thread being inserted so as to bite into the inner wall of the insertion hole, it may also be inserted while deforming the first thread so as to be crushed. Also, the rib portion may be omitted. [Explanation of Symbols]

[0054] 1 Anchor pin 2 wall 3 skeleton 4 Mortar layer 5 tiles 6 Insertion hole 10 Anchor body 11 First thread 12 Second thread 20 Proximal end 30A adjustment section 30B Adjustment part 31 Adjustment piece 32 Adjustment piece main body 33 Small diameter section

Claims

1. A shaft-shaped anchor body is inserted into an insertion hole drilled in the building structure, The anchor body has a axial base end portion provided on the base end side and having a head, The anchor body is formed in a spiral shape and has at least two first threads wound around the outer circumferential surface of the anchor body, An anchor pin characterized in that each of the first threads is arranged at equal intervals on the outer surface of the anchor body, and the outer diameter of the first threads is larger than the inner diameter of the insertion hole.

2. The anchor body is formed in a spiral shape and includes at least two second threads that are wound around the outer circumferential surface of the anchor body. The anchor pin according to claim 1, characterized in that each of the second threads is arranged at equal intervals on the outer surface of the anchor body, and the outer diameter of the second thread is smaller than the outer diameter of the first thread.

3. The anchor pin according to claim 2, characterized in that the anchor body portion has the same number of first threads and the second threads arranged at equal intervals from each other.

4. The anchor pin according to claim 1, further characterized by having a rib portion that protrudes radially outward along the circumferential direction of the outer surface of the base end.

5. The anchor body is provided with an adjustment section located at the tip end, which is composed of multiple adjustment pieces connected together. The adjustment piece comprises an adjustment piece body and The adjustment piece body is provided with a small-diameter portion that is smaller in diameter than the adjustment piece body, The anchor pin according to claim 1, characterized in that the length is adjusted by cutting the small diameter portion.

6. The adjustment piece body is formed in a spiral shape and includes at least two first threads wound around the outer circumferential surface of the adjustment piece body, The anchor pin according to claim 5, characterized in that each of the first threads is arranged at equal intervals on the outer circumferential surface of the adjustment piece body, and the outer diameter of the first threads is larger than the inner diameter of the insertion hole.

7. The adjustment piece body is formed in a spiral shape and includes at least two second threads wound around the outer circumferential surface of the adjustment piece body, The anchor pin according to claim 6, characterized in that each of the second threads is arranged at equal intervals on the outer circumferential surface of the adjustment piece body, and the outer diameter of the second thread is smaller than the outer diameter of the first thread.

8. A pinning method using an anchor pin as described in any one of claims 1 to 7, A drilling step of drilling an insertion hole in the aforementioned body, A filling step of filling the insertion hole with adhesive, The process includes an insertion step of inserting the anchor pin into the insertion hole filled with adhesive, The pinning method is characterized in that, in the insertion step, the anchor pin is inserted while the first thread of the anchor pin bites into the inner wall of the insertion hole.

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