JP2015113855A - Anchor member and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor member tightly fixed in concrete and having high quality.SOLUTION: An anchor member 1 is used while buried into concrete 250, and includes a rod-like body member 10 and a head member 20 mounted to the body member 10 so as to have a portion projected from the periphery of the body member 10. The body member 10 has a groove part 14. The head member 20 is mounted to the body member 10 by depressing a ring-like member 20' inserted into the body member 10 from outside to be deformed and inserting the ring-like member 20' into the groove part 14.

Description

  The present invention relates to an anchor member and a manufacturing method thereof, and more particularly, to an anchor member such as an insert anchor or an anchor bolt that is set in advance before placing concrete and a manufacturing method thereof.

  Conventionally, insert anchors and anchor bolts exist as anchor members that are installed in advance before placing (casting) concrete. Here, the insert anchor has an internal thread portion, and the internal thread portion can be connected to the external thread portion of another member from the concrete surface. On the other hand, the anchor bolt has a male threaded portion, and the male threaded portion protrudes from the concrete surface, and can be connected to another member using a nut or the like.

  At this time, if a rod-like member having a threaded portion is simply embedded in concrete, it will be easy to come off with a certain force or more. For this reason, for example, in the case of an insert anchor, by making a hole in the lateral direction deeper than the female screw part, inserting another bar material from the lateral direction, and pouring the concrete to solidify, the other bar member There is a method to make the anchor difficult to come out of the concrete.

  Further, in the cited document 1, there is a description of an insert having a bifurcated portion on the other end side of the female screw hole, and it is described that resistance is provided at the bifurcated portion with respect to a force for pulling out the insert.

JP 2000-337335 A

  However, when the other bar member is inserted from the lateral direction, the bar member may be forgotten to be inserted when the concrete is hardened, and the time and effort is required when placing the concrete. Further, the following problem described with reference to FIGS.

  FIG. 13 shows a conventional method for manufacturing an insert anchor, and FIG. 14 is a view of mounting the conventional insert anchor in concrete. As shown in FIG. 13, the main body member 200 formed of a columnar member such as a reinforcing bar cuts a lateral hole 201 and inserts a bar member 210 made of a reinforcing bar or the like there. After that, concrete is placed and the state shown in FIG. 14 is obtained. The main body member 200 has a female screw portion 202 on the surface 251 side of the concrete 250. At this time, a gap 230 exists between the hole 201 and the bar member 210, and the concrete 250 does not flow between them, and a gap width T due to the gap 230 exists. In this state, when the main body member 200 is pulled in the direction of the surface 251 through the male screw member 220 or the like attached to the female screw portion 202, the main body member 200 moves relative to the rod member 210 in the gap width T. Therefore, the rod member 210 cannot become a resistance. For this reason, problems such as deformation occur. The bearing plate of the Architectural Institute standard does not meet the requirement that it must not be deformed.

  Further, when providing a bifurcated portion as in the cited document 1, in order to form the bifurcated portion from a strong reinforcing bar, it is necessary to perform plastic working with a press or the like, but it is necessary to greatly deform at the base of the bifurcated portion. . At this time, there is a risk of cracks at the base portion of the bifurcated portion, which causes a problem in the stability of strength quality.

  In view of the above problems, an object of the present invention is to provide a high-quality anchor member that is firmly fixed in concrete and a method for manufacturing the same.

  In order to achieve the above object, an anchor member according to the present invention is an anchor member embedded in concrete and used with a rod-like main body member and a portion protruding from the periphery of the main body member. The main body member has a groove portion, and the head member is deformed by pressing a ring-shaped member inserted into the main body member from the outside to enter the groove portion. Is mounted as the head member.

Furthermore, the anchor member of the present invention is characterized in that the main body member is a metal columnar member, and the groove portion is press-molded by pressing a mold against the main body member.
Furthermore, in the anchor member of the present invention, the head member is made of metal, and a mold having a concave arcuate portion at the center and inclined portions at both ends thereof is pressed against the ring-shaped member from both sides. It is characterized by being molded.
Furthermore, the anchor member according to the present invention is characterized in that the head member has a ring portion and a protruding portion protruding outward from the ring portion.

Furthermore, the anchor member of the present invention has an internal thread portion formed in a hole having a fixed depth from one end portion in the main body member, and the hole is used by opening on the concrete surface. It is an insert anchor.
Furthermore, the anchor member of the present invention is an anchor bolt which has an external thread portion formed at a certain length at one end portion of the main body member, and the external thread portion is used by protruding from the concrete surface. It is characterized by that.

  The anchor member manufacturing method of the present invention is a method of manufacturing an anchor member that is used by being embedded in concrete, wherein a groove is formed in a rod-shaped main body member, and the ring-shaped member inserted into the main body member is viewed from the outside. It is mounted as a head member having a portion that protrudes from the periphery of the main body member by being pushed and deformed to enter the groove portion.

Furthermore, the anchor member manufacturing method of the present invention is characterized in that the main body member is a metal columnar member, and the groove portion is press-molded by pressing a mold against the main body member.
Furthermore, in the anchor member manufacturing method of the present invention, the head member is made of metal, and a mold having a concave arcuate portion at the center and inclined portions at both ends thereof is pushed from both sides against the ring-shaped member. It is characterized by being press-molded.

Furthermore, in the method for manufacturing an anchor member according to the present invention, the anchor member has a female screw portion formed in a hole having a fixed depth from one end portion in the main body member, and the hole is opened on the concrete surface. It is an insert anchor used.
Furthermore, in the method for manufacturing an anchor member according to the present invention, the anchor member has a male screw portion formed at a certain length at one end of the main body member, and the male screw portion is used by protruding from the concrete surface. It is a bolt.

  ADVANTAGE OF THE INVENTION According to this invention, the anchor member firmly fixed in concrete and good quality and its manufacturing method can be provided.

1 shows a perspective view of an insert anchor of Example 1. FIG. FIG. 2 shows a side view as an example of mounting the insert anchor of Example 1 in concrete. FIG. 3 shows an AA cross section in FIG. FIG. 4 is a cross-sectional view in the longitudinal direction in the method for manufacturing the body member of the insert anchor according to the first embodiment. FIG. 5 is a cross-sectional view in the planar direction at the groove in the method for manufacturing the body member of the insert anchor of the first embodiment. 6 shows a method for manufacturing a head member attached to a body member of an insert anchor of Example 1. FIG. FIG. 7 shows a side view as an example of mounting the anchor bolt of Example 2 in concrete. FIG. 8 is a perspective view of the insert anchor according to the third embodiment. FIG. 9: shows the side view as an example of mounting | wearing in the concrete of the insert anchor of Example 3. FIG. FIG. 10 shows an FF cross section in FIG. FIG. 11 shows a method for manufacturing a head member attached to a main body member of an insert anchor of Example 3. FIG. 12 shows a side view as an example of mounting the anchor bolt of Example 4 in concrete. FIG. 13 shows a conventional method for manufacturing an insert anchor. FIG. 14 shows a mounting view of a conventional insert anchor in concrete.

  A mode for carrying out the present invention will be described. As an embodiment of the anchor member of the present invention, an insert anchor and an anchor bolt will be described.

  1 shows a perspective view of an insert anchor of Example 1. FIG. FIG. 2 shows a side view as an example of mounting the insert anchor of Example 1 in concrete. FIG. 3 shows an AA cross section in FIG.

  The insert anchor 1 according to the first embodiment includes a main body member 10 and a head member 20, and the head member 20 is mounted with a portion protruding from the outer periphery of the main body member 10. Specifically, the head member 20 is configured to protrude from the entire circumference of the main body member 10.

  The main body member 10 is a rod-shaped member, and specifically, a cylindrical metal member can be applied. As specific examples, round steel bars made of steel and deformed bars with protrusions on the surface can be applied.

  The main body member 10 has a bottomed hole 11 formed at one end from an end surface, and an internal thread portion 12 is formed inside the main body member 10, which is an engaging portion that can be engaged with another member having a male screw. In the concrete 250, as shown in FIG. 2, the end surface of the bottomed hole 11 side of the main body member 10 is on the surface portion 251 side so that the opening portion of the bottomed hole 11 opens on the surface portion 251 side of the concrete 250. Mounted in position. Thereby, another member can be connected to the female screw portion 12 and fixed to the concrete 250 side.

  A groove portion 14 is formed in a portion of the main body member 10 where the bottomed hole 11 does not exist. That is, the groove portion 14 is formed on the back side of the bottomed hole 11 with respect to the surface portion 251 of the concrete 250. As shown in FIG. 3, the groove portion 14 can form two grooves so as to bite into the cylinder from both sides with respect to the circular cross section of the cylinder of the main body member 10. At this time, the non-groove portion 15 has a shape of two protrusions formed in a symmetric direction with respect to the groove portion 14, and can serve as a stopper for the head member 20.

  The head member 20 is formed of a ring-shaped metal member, and has a ring portion 21 and a protrusion portion 22. The ring portion 21 has a circular shape, and the outer diameter thereof is larger than the outer diameter of the main body member 10 other than the groove portion 14. As an example, it may be 1.5 times or more. As the material of the head member 20, a steel material that can be cold-worked can be applied, and for example, an SS material (a general structural rolled steel material) or the like can be applied. For example, if cold working is performed with SS400 grade soft steel, there is no problem in the quality of the material.

  The head member 20 is formed so as to enter the groove portion 14 of the main body member 10 as shown in FIGS. For this reason, the head member 20 is caught by the groove portion 14 of the main body member 10, and the head member 20 does not come off from the main body member 10. Further, since the head member 20 has entered the entire groove portion 14 of the main body member 10, the non-groove portion 15 serves as a stopper, and is firmly fixed without rattling in the rotation direction.

  The projecting portions 22 of the head member 20 are formed at two positions on the outer periphery at positions symmetrical to the center, and project outward from the outer diameter of the ring portion 21. The protrusion 22 is formed by a manufacturing method described later. Further, the protruding portion 22 of the head member 20 is formed in the same direction as viewed from the center of the non-groove portion 15 of the main body member 10 and the main body member 10. The shape is a triangular shape with an apex on the outside. The protrusion 22 can serve as a stopper for the concrete 250.

  Thus, since the insert anchor 1 is configured so that the head member 20 protrudes, the head member 20 becomes a resistance, and even if the insert anchor 1 is pulled toward the surface portion 251 side of the concrete 250, the insert anchor 1 can be easily It does not come out and can maintain high strength. The outer diameter at the time of mounting the head member 20 can be selected depending on the strength. For example, when a pulling force is applied to the anchor in the guidelines of the Architectural Institute, the head member generates a bearing stress level that is six times the concrete strength. Can also meet the demand for no deformation.

  4 and 5 show a method for manufacturing the body member 10 of the insert anchor 1 according to the present invention, FIG. 4 shows a sectional view in the longitudinal direction, and FIG. 5 shows a sectional view in the planar direction of the groove portion 14.

  As shown in FIG. 4, by using two groove molds 100 and performing cold pressing from both, the main body member 10 is pushed and deformed, and groove portions 14 are formed on both sides of the main body member 10, respectively. The At this time, the thickness of the groove mold 100 is the width of the groove portion 14 in the longitudinal direction of the main body member 10, and this width is a thickness that allows the head member 20 (ring member 20 ′) to enter by processing described later. At this time, for example, if the deformed reinforcing bar is used, the load of the press becomes large, but the formation of the groove does not affect the quality of the material.

  As shown in FIG. 5, the shape of the groove mold 100 has a concave arc portion 101 at the center, and both ends thereof are straight portions 102 formed in a direction perpendicular to the direction of travel of the mold. Yes. The main body member 10 is pressed against the arc portion 101 from both sides to perform plastic working. The groove mold 100 is stopped at an interval B as shown in FIG. At this time, the interval B is the width of the protrusion of the non-groove portion 15. Further, the distance C between the bottom portions of the arc portions 101 of the two groove molds 100 at this time is shorter than the thickness (diameter) D of the other portion of the main body member 10, and the thickness of the main body member 10 in the groove portion 14 portion. It becomes.

  FIG. 6 shows a manufacturing method when the head member 20 is mounted on the body member 10 of the insert anchor 1 according to the present invention. The head member 20 is formed by subjecting two head member molds 110 to cold plastic processing from both sides. The head member mold 110 has a concave arc portion 111 in the center, and both ends thereof are inclined portions 112. Further, outside the inclined portions 112 on both sides, respectively, in the direction in which the mold proceeds. A straight portion 113 is formed in a perpendicular direction.

  As shown in the upper drawing of FIG. 6, the ring member 20 ′, which is the head member 20 before molding, is a donut-shaped ring plate having a certain thickness and has a circular hole 23 ′ on the inside. The outer periphery is also circular. The thickness of the ring member 20 ′ corresponds to the groove 14. The main body member 10 is passed through the circular hole 23 ′ of the ring member 20 ′, and the ring member 20 ′ is disposed at a position where the groove portion 14 of the main body member 10 is formed. That is, the inner diameter of the ring member 20 ′ (the diameter of the circular hole 23 ′) is such that the main body member 10 can be inserted into the groove portion 14. Specifically, it is larger than at least the diameter D of the main body member 10. Furthermore, since the non-groove part 15 may swell at the time of formation, when it is assumed, it is made larger than the distance between the outer end parts of the non-groove part 15. Further, each of the groove portions 14 faces the head member mold 110 side, and the circumferential position of the non-groove portion 15 is arranged in a direction perpendicular to the moving direction of the die.

  As shown in the upper diagram of FIG. 6, when the head member molds 110 are pushed in the direction approaching each other, the four inclined portions 112 of the two head member molds 110 hit at four locations on the outer periphery of the ring member 20 '. From this state, when the head member mold 110 is pushed closer to each other, the ring member 20 ′ is squeezed inward, and the inner hole 23 ′ enters the groove portion 14. By doing so, the shape of the head member 20 described above is obtained as shown in the lower diagram of FIG.

  At this time, the inclined surface of the inclined portion 112 is formed toward the ring member 20 'side. Therefore, a force is applied to the ring member 20 ′ by the inclined portion 112 toward the inner side of the ring member 20 ′. That is, the force toward the center from the groove portion 14 side (left and right in FIG. 6), which is the direction in which the head member mold 110 travels, and the force toward the center from the non-groove portion 15 side (vertical direction in FIG. 6) perpendicular thereto. It will take. As a result, the head member 20 can enter the groove portion 14. Further, the arc portion 111 also applies a force from the groove portion 14 side (left and right in FIG. 6) toward the center. Accordingly, the head member 20 can enter the entire groove portion 14 and is firmly fixed to the main body member 10. Further, a part of the head member 20 escapes to the inclined portion 112 side to form the protruding portion 22.

  Eventually, the head member mold 110 ends after a certain distance E.

  The angle θ of the inclined portion 112 with respect to the linear portion 113 is determined in consideration of the balance between the inward force and the escape to the inclined portion 112 described above. For example, if θ is too large, the angle becomes tight, and a part of the head member 20 does not escape outward and cannot be formed well. Moreover, if θ is too small, a part of the head member 20 may escape to the outside, and the head member 20 may not surely enter the groove portion 14.

  By forming in this way, the insert anchor 1 can be manufactured. Then, the manufactured insert anchor 1 can be embedded in the concrete 250 as illustrated in FIG. 2 by installing it in advance before pouring the concrete and pouring the concrete. The male screw member 90 and the like can be connected to the female screw portion 12 in the bottomed hole 11 opened from the surface portion 251 of the concrete 250 and used.

  In the insert anchor 1 according to the first embodiment, the head member 20 is firmly inserted into the groove portion 14. As a result, there is no backlash and the strength in the rotational direction is high. In addition, since there is basically no gap inside, it is possible to prevent adverse effects such as rust caused by air in the gap where concrete cannot enter.

  FIG. 7 shows a side view as an example of mounting the anchor bolt 2 of Example 2 in concrete. In the second embodiment, differences from the first embodiment will be described.

  The anchor bolt 2 according to the second embodiment includes a main body member 30 and a head member 20, and the main body member 30 has a male screw portion 31 as an engaging portion. As shown in FIG. 7, the male screw portion 31 is arranged in the concrete 250 so as to come out from the surface portion 251 of the concrete 250. Thereby, connection of another member to a direct attachment other party is attained. Other configurations are the same as those in the first embodiment, and the main body member 30 has the groove portions 14 and the non-groove portions 15, which are processed in the same manner as in the first embodiment. The head member 20 is processed and mounted on the main body member 30 in the same manner as in the first embodiment. Then, the manufactured anchor bolt 2 can be embedded in the concrete 250 as illustrated in FIG. 7 by installing it in advance before pouring the concrete and pouring the concrete.

  FIG. 8 is a perspective view of the insert anchor according to the third embodiment. FIG. 9: shows the side view as an example of mounting | wearing in the concrete of the insert anchor of Example 3. FIG. FIG. 10 shows an FF cross section in FIG. In the third embodiment, differences from the first embodiment will be mainly described.

  The insert anchor 3 according to the third embodiment includes a main body member 10 and a head member 40, and the head member 40 is mounted with a portion protruding from the outer periphery of the main body member 10. Specifically, the head member 40 has a portion protruding from the entire circumference of the main body member 10. Here, in the third embodiment, the shape of the head member 40 is different from that of the first embodiment, the configuration of the main body member 10 is the same as that of the first embodiment, and the manufacturing method of the main body member 10 is also the same as in FIGS.

  The head member 40 is formed of a ring-shaped metal member, and generally has a shape in which both sides in one direction are formed longer than the other, and the ring is slightly crushed. The head member 40 has an arc portion 41 having two arc shapes facing each other and two connection portions 42 that connect the arc portions. The connecting portion 42 is connected by a curved surface as shown in FIG. The curvature of the connecting portion 42 is smaller than the curvature of the arc portion 41. Thus, since the head member 40 is long on both sides, the head member 40 can serve as a stopper for the concrete 250. The material of the head member 40 is the same as that of the head member 20 of the first embodiment.

  As shown in FIG. 10, the head member 40 is formed so as to enter the groove portion 14 of the main body member 10. For this reason, the head member 40 does not come off from the main body member 10.

  As described above, since the insert anchor 3 is configured so that the head member 40 protrudes, high strength can be maintained even when the insert anchor 3 is pulled toward the surface portion 251 side of the concrete 250 due to the resistance of the head member 40. . The dimensions of the head member 40 can be selected according to the strength as in the first embodiment.

  FIG. 11 shows a manufacturing method when the head member 40 is attached to the main body member 10 of the insert anchor 3 in the third embodiment. The head member 40 is formed by plastically processing the two head member molds 120 from both sides with a cold press. The head member mold 120 has a concave arc portion 121 at the center, and both ends of the head member mold 120 are linear portions 122 formed in a direction perpendicular to the traveling direction of the mold. A corner portion 123 is formed between the arc portion 121 and the straight portion 122.

  As shown in the upper drawing of FIG. 11, the shape of the ring member 20 ′ that is the head member 40 before molding is the same as that in the first embodiment, and the installation on the main body member 10 is also the same.

  As shown in the upper drawing of FIG. 11, when the head member mold 120 is pushed in a direction approaching each other, the four corners 123 of the two head member molds 130 hit at four locations on the outer periphery of the ring member 20 ′. From this state, when the head member mold 120 is pushed closer to each other, the ring member 20 ′ is squeezed inward, and the inner hole 23 ′ enters the groove 14. By doing so, the shape of the head member 40 described above is obtained as shown in the lower diagram of FIG.

  At this time, the corner portion 123 is arranged to be pushed outside the main body member 10 or near the outer end of the main body member 10. For this reason, after the arc portion 41 enters the groove portion 14, the arc portion 41 is deformed along the groove portion 14 by being pushed outside the center to some extent. Thereby, the circular arc part 41 can enter the groove part 14 within a certain range. At this time, the connecting portion 42 is crushed to some extent. Thus, the head member 40 is firmly fixed to the main body member 10.

  Eventually, the head member mold 120 ends after a certain distance G. By forming in this way, the insert anchor 3 can be manufactured. Then, the manufactured insert anchor 3 can be embedded in the concrete 250 as illustrated in FIG. 2 by installing it in advance before pouring the concrete and pouring the concrete. The male screw member 90 and the like can be connected to the female screw portion 12 in the bottomed hole 11 opened from the surface portion 251 of the concrete 250 and used.

  The insert anchor 3 in the third embodiment has a larger area protruding outward than the insert anchor 1 in the first embodiment. For this reason, since the bearing area is large for the same ring member 20 ′, the pulling strength is increased.

  FIG. 12 shows a side view as an example of mounting the anchor bolt of Example 4 in concrete. In the fourth embodiment, differences from the first to third embodiments will be described.

  The anchor bolt 4 according to the fourth embodiment includes the main body member 30 according to the second embodiment and the head member 40 according to the third embodiment. The main body member 30 includes a male screw portion 31 as an engaging portion. As shown in FIG. 12, the surface portion 251 of the concrete 250 is formed so as to protrude from the table. Thereby, connection of another member to a direct attachment other party is attained. The main body member 30 has the groove part 14 and the non-groove part 15, and these are processed similarly to Example 1. The head member 40 is processed and mounted on the main body member 30 in the same manner as in the third embodiment. Then, the manufactured anchor bolt 4 can be embedded in the concrete 250 as illustrated in FIG. 12 by installing the anchor bolt 4 in advance before placing the concrete and pouring the concrete.

DESCRIPTION OF SYMBOLS 1, 3 Insert anchor 2, 4 Anchor bolt 10, 30 Main body member 11 Bottomed hole 12 Female thread part 14 Groove part 15 Non-groove part 20, 40 Head member 21 Ring part 22 Projection part 20 'Ring member 23' Hole 31 Male thread part 41 Arc Part 42 Connection part 90 Male thread member 100 Groove mold 101 Arc part 110, 120 Head part mold 111, 121 Arc part 112 Inclined part 113, 122 Straight part 123 Corner part 250 Concrete 251 Surface part

In order to achieve the above object, an anchor member according to the present invention is an anchor member embedded in concrete and used with a rod-like main body member and a portion protruding from the periphery of the main body member. The main body member has a groove portion, and the head member is deformed by pressing a ring-shaped member inserted into the main body member from the outside to enter the groove portion. As the head member , the head member is made of metal and pressed against the ring-shaped member by pressing a mold having a concave arcuate portion at the center and inclined portions at both ends from both sides. It is characterized by being molded .

Furthermore, the anchor member of the present invention is characterized in that the main body member is a metal columnar member, and the groove portion is press-molded by pressing a mold against the main body member . Anchor member of the present invention is to is found, the head member, characterized in that it has a ring portion, and a protruding portion that protrudes outward from the ring portion.

The anchor member manufacturing method of the present invention is a method of manufacturing an anchor member that is used by being embedded in concrete, wherein a groove is formed in a rod-shaped main body member, and the ring-shaped member inserted into the main body member is viewed from the outside. By being pushed and deformed to enter the groove portion, it is mounted as a head member having a portion that protrudes from the periphery of the main body member, and the head member is made of metal, and is centered with respect to the ring-shaped member. A mold having a concave arcuate portion and inclined portions at both ends thereof is pressed from both sides to be press-molded .

Furthermore, the anchor member manufacturing method of the present invention is characterized in that the main body member is a metal columnar member, and the groove portion is press-molded by pressing a mold against the main body member .

Claims (11)

In anchor members that are used by embedding in concrete,
A rod-shaped main body member, and a head member attached to the main body member with a portion protruding beyond the periphery of the main body member,
The main body member has a groove portion, and the head member is attached to the main body member as the head member by pressing and deforming a ring-shaped member inserted into the main body member from outside to enter the groove portion. An anchor member characterized by that.   2. The anchor member according to claim 1, wherein the main body member is a metal columnar member, and the groove portion is press-molded by pressing a mold against the main body member.   The head member is made of metal, and is press-molded by pressing a die having a concave arcuate portion at the center and inclined portions at both ends of the ring-shaped member from both sides. The anchor member according to claim 1 or claim 2.   The anchor member according to claim 1, wherein the head member includes a ring portion and a protruding portion that protrudes outward from the ring portion.   The anchor member has an internal thread portion formed in a hole of a certain depth from one end portion in the main body member, and the hole is an insert anchor used by opening on a concrete surface. The anchor member according to any one of claims 1 to 4.   2. The anchor member according to claim 1, wherein the main body member has an external thread portion formed at a fixed length at one end, and the external thread portion is an anchor bolt that protrudes from the concrete surface. The anchor member according to any one of claims 1 to 4. In the manufacturing method of an anchor member used by embedding in concrete,
Form a groove in the rod-shaped body member,
An anchor member characterized in that a ring-shaped member inserted into the main body member is pushed from the outside to be deformed to enter the groove portion, thereby mounting as a head member having a portion protruding from the periphery of the main body member. Manufacturing method.   8. The method of manufacturing an anchor member according to claim 7, wherein the main body member is a metal columnar member, and the groove portion is press-molded by pressing a mold against the main body member.   The head member is made of metal, and is press-molded by pressing a die having a concave arcuate portion at the center and inclined portions at both ends of the ring-shaped member from both sides. The manufacturing method of the anchor member of Claim 7 or Claim 8.   The anchor member has an internal thread portion formed in a hole of a certain depth from one end portion in the main body member, and the hole is an insert anchor used by opening on a concrete surface. The manufacturing method of the anchor member according to any one of claims 7 to 9.   The said anchor member has the external thread part by which the fixed length was formed in the one end part in the said main body member, and the said external thread part is an anchor bolt used protruding from the concrete surface. The manufacturing method of the anchor member as described in any one of Claim 9.

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