JP2015127580A - Holding means of anchor bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide holding means of an anchor bolt which unfailingly inhibits swinging of an anchor bolt.SOLUTION: Holding means of the invention includes a cylindrical retainer 17 which retains an anchor bolt inserted into a hole 2 so as to retain the anchor bolt that is inserted into the hole 2 provided on a wall surface 1 such as a concrete floor and is fixed thereto. A rod 3 of the anchor bolt may be inserted into an inner peripheral surface 17b of the retainer 17. A protruding part 17a which protrudes in a lateral direction so as to restrain the retainer 17 from entering to the inner side of the hole 2 is provided in the retainer 17. An outer diameter of the protruding part 17a is larger than an inner diameter of the hole 2.

Description

  The present invention relates to a holding means for holding a fixed state in an anchor bolt that is inserted into a hole formed in a wall surface such as a concrete floor and fixed.

  For example, as shown in Patent Document 1, there is known a technique in which a hole (hole) is formed in a concrete floor or the like using a drill or the like, and an anchor bolt is inserted and fixed in the hole.

  In the anchor bolt of Patent Document 1, a wedge body that forms a pair of inclined wedge surfaces that are separated from the central axis of the anchor bolt toward the lower end thereof, and a reverse wedge surface that is in contact with the wedge surface of the wedge body is provided on the inner surface side. And a connecting bottom plate for connecting the lower ends of the retaining members.

  Then, after inserting the anchor bolt into the hole, the wedge body is raised by tightening the nut to the bolt fixed to the upper end of the wedge body, and the wedge surface of the wedge body is the reverse wedge surface of the retaining member. push. Thereby, both the retaining members are expanded, and the outer peripheral surface of the retaining member is pressed against the inner peripheral surface of the hole, and the anchor bolt is fixed to the hole (FIG. 1 of Patent Document 1). State).

  In the anchor bolt, the anchor bolt may be shaken by vibration of a device fixed to the anchor bolt by welding or the like, and the device may be further vibrated. Further, when the anchor bolt is shaken, the nut loosens and the wedge body descends, and the force pushing the reverse wedge surface of the retaining member by the wedge surface of the wedge body becomes weak, and the retaining member and the inner peripheral surface of the hole There is also a possibility that the anchor bolt is loosened and the anchor bolt easily comes out of the hole.

  As a countermeasure, for example, it is conceivable to attach a holder (spacer) as shown in Patent Document 2 to the anchor bolt. In the holder of Patent Document 2, when an anchor bolt (lock bolt) is inserted into the hole, the holding piece of the holder comes into contact with the inner peripheral surface of the hole and the anchor bolt is moved toward the center axis of the hole. The anchor bolt is held in a posture along the center axis of the hole by pushing with an elastic repulsive force.

Japanese Utility Model Publication No. 49-49364 JP 2004-332261 A

  In the anchor bolt of Patent Document 1, when the vibration or the like is applied in a state where the anchor bolt is inserted into the hole (the state of FIG. 1 of Patent Document 1), the anchor bolt swings around a fulcrum. Since the swaying width increases toward the upper side of the anchor bolt, in order to effectively suppress the swaying, it is desirable to dispose the holder as close to the opening of the hole as possible.

  However, the holder of Patent Document 2 is fitted and attached from the side of the anchor bolt (see Paragraph 0021 of Patent Document 2) and is not fixed to the anchor bolt. It is possible to move in the length direction (axial direction). Therefore, for example, when the holder is inserted into the hole with the anchor bolt mounted, the holder is in an appropriate position (position of the opening of the hole) by contact between the holder and the edge of the opening of the hole. There exists a problem that there exists a possibility of arrange | positioning in the position in the hole which shifted | deviated from. In addition, since it is not easy to change the position of the holder unless it is removed from the anchor bolt, it is difficult to arrange the holder at the proper position.

  The present invention has been provided for the purpose of solving such a problem, and it is an object of the present invention to provide an anchor bolt holding means capable of reliably suppressing the anchor bolt from shaking due to vibration or the like.

  The present invention is a holding means for holding an anchor bolt inserted and fixed in a hole 2 provided in a wall surface 1, and a cylindrical holder for holding the anchor bolt in a state of being inserted into the hole 2. The holding tool 17 allows the rod 3 of the anchor bolt to be inserted inside the inner peripheral surface 17b, and further restricts the holding tool 17 from entering the back side of the hole 2. It is characterized by having.

  The wall surface 1 here includes civil engineering structures such as tunnels, concrete ceilings of buildings, wall surfaces such as floors and side walls, and wall surfaces of rock walls. The rod 3 of the anchor bolt includes a case where the male screw 9 is formed on the whole or a part of the rod 3 and a case where the male screw 9 is not formed. The holder 17 is preferably positioned at the opening of the hole 2, but may slightly enter the back side of the hole 2 relative to the opening of the hole 2, and slightly protrude from the opening of the hole 2. May be. The holder 17 is inserted into the hole 2 together with the anchor bolt after being fitted into the rod 3 of the anchor bolt, and the holder 17 is inserted into the rod 3 of the anchor bolt after being inserted into the hole 2. Is included. The holder 17 is formed of a metal such as stainless steel, a synthetic resin, or the like, and may have a cut extending in the axial direction (vertical direction in FIG. 1), for example.

  As the restricting means, a projecting portion 17a that projects laterally at an end portion that becomes the opening side of the hole 2 when the retainer 17 is inserted into the hole 2 out of both axial end portions of the retainer 17 is provided. It may be configured by providing and making the outer diameter of the projecting portion 17 a larger than the inner diameter of the hole 2. The horizontal direction of the holder 17 corresponds to a direction that is perpendicular or substantially perpendicular to the axis of the holder 17. The protruding portion 17a is formed only on a part of the entire circumference of the holder 17 when it is formed over the entire circumference of the holder 17, when it is intermittently formed in the circumferential direction of the holder 17. And if you are.

  The projecting portion 17a has an end surface 17d on the back side of the hole 2 formed in an inclined surface when the holder 17 is inserted into the hole 2 out of both axial end surfaces of the holder 17. It can be. Here, the end surface 17d is inclined so as to approach the tip of the holder 17 (the back side of the hole 2) toward the central axis side of the holder 17, and on the central axis side of the holder 17. The case where it inclines so that it may approach the base end (opening side of the said hole 2) of the holder 17 as it goes is included.

  Further, the restricting means can be configured by disposing a cylindrical elastic body 23 through which the rod 3 of the anchor bolt can be inserted on the back side of the hole 2 with respect to the holder 17. The outer diameter of the body 23 is larger than the inner diameter of the hole 2. Here, the elastic body 23 includes a synthetic resin that is easily elastically deformable or easily plastically deformed, such as fluorine rubber and nitrile rubber. The elastic body 23 may have a cut extending in its axial direction (vertical direction in FIG. 4), for example. The elastic body 23 may be in close contact with the end surface (the lower surface in FIG. 4) of the hole 2 in the holder 17, and the end surface on the back side of the hole 2 in the holder 17. The elastic body 23 and the holder 17 may have a slight gap.

  Further, the restricting means can be configured by forming a groove 24 in the circumferential direction of the inner peripheral surface 17b of the holder 17 and disposing an easily deformable ring-shaped elastic body 25 in the groove 24. The elastic body 25 can come into contact with the rod 3 of the anchor bolt inserted through the holder 17. Here, the elastic body 25 includes a synthetic resin that can be easily elastically or plastically deformed, such as fluorine rubber and nitrile rubber, and a C-ring that is easily elastically deformed. The elastic body 25 may have a cut. The groove 24 includes a case where only one groove is formed and a case where a plurality of grooves 24 are formed, and the elastic body 25 is arranged in a number corresponding to the number of the grooves 24. The groove 24 may be slightly inclined with respect to the circumferential direction of the inner peripheral surface 17 b of the holder 17.

  The holder 17 according to the present invention holds the anchor bolt fixed to the hole 2 by being inserted into the hole 2 of the wall surface 1 while being fitted to the rod 3 of the anchor bolt, for example, and attached to the hole 2. Thus, the anchor bolt can be prevented from shaking due to an external factor or the like. As a result, it is possible to prevent the device fixed to the rod 3 from shaking due to the swing of the anchor bolt.

  Since the holder 17 is restricted from entering the back side of the hole 2 by the restricting means, the holder 17 is maintained at the position of the opening of the hole 2 that can effectively suppress the swing of the anchor bolt. And the anchor bolt can be reliably prevented from shaking.

  When a protrusion 17a that protrudes in the lateral direction is provided at the end of the hole 2 on the opening side of the holder 17 as a restricting means, the protrusion 17a is opened to the hole 2 when the holder 17 is inserted into the hole 2. It is possible to reliably prevent the holder 17 from entering the back side of the opening portion of the hole 2 by contacting the edge of the hole 2.

  In addition, when the holder 17 is inserted into the hole 2, the protrusion 17 a can be bited into the edge of the opening of the hole 2, so that the holder 17 can be prevented from moving laterally due to the bite. it can. By holding the rod 3 of the anchor bolt by the holder 17, it is possible to reliably suppress the swing of the anchor bolt.

  If the end surface 17d of the projecting portion 17a is formed into an inclined surface, the projecting portion 17a can easily bite into the edge of the opening of the hole 2 when the retainer 17 is inserted into the hole 2, so that the retainer 17 It is possible to more reliably suppress lateral movement.

  If the elastic body 23 is arranged behind the hole 2 as the restricting means, the outer diameter of the elastic body 23 is larger than the inner diameter of the hole 2. Since it is difficult to move to the back side of the hole 2 due to friction or the like being pressed against the inner peripheral surface 4, the holder 17 is received by the elastic body 23 even if trying to enter the back side of the hole 2. The movement (entrance) to the back side of 2 is prevented.

  As a restricting means, an easily deformable elastic body 25 is disposed in the groove 24 on the inner peripheral surface 17b of the holder 17, and the elastic body 25 can come into contact with the rod 3 of the anchor bolt. A gap with the rod 3 is filled with an elastic body 25. The rod 3 can be firmly held by the holding tool 17 correspondingly, and the anchor bolt can be prevented from shaking. Since the elastic body 25 is easily deformed when it comes into contact with the rod 3 of the anchor bolt, it is possible to prevent the elastic body 25 from interfering with the insertion of the rod 3.

It is a longitudinal cross-sectional view which shows the state which mounted | wore the anchor bolt with the holder which concerns on this invention. It is a longitudinal cross-sectional view for demonstrating the procedure which mounts the holder and anchor bolt which concern on this invention to a hole. It is a longitudinal cross-sectional view which shows the state which mounted | wore the hole with the holder and anchor bolt which concern on this invention. It is a longitudinal cross-sectional view which shows another Example of the holding means based on this invention. It is a longitudinal cross-sectional view which shows another Example of the holding means based on this invention.

  An embodiment of the anchor bolt holding means of the present invention will be described with reference to FIGS. The anchor bolt is inserted into and fixed to a hole 2 (provided), for example, on a wall surface 1 (FIG. 3) of a concrete floor, and the anchor bolt fixed to the hole 2 is a holding tool. 17 is held. Specifically, the holder 17 is inserted into the hole 2 in a state of being fitted to the rod 3 of an anchor bolt, for example, and is mounted (arranged) at the position of the opening of the hole 2 (the position of the upper end of the hole 2 in FIG. 3). )

  As shown in FIG. 1, the anchor bolt is attached to the tip end (lower end in FIG. 1) of the cylindrical rod 3, and the anchor bolt is attached to the cylindrical inner peripheral surface 4 (see FIG. 2) of the hole 2. An expansion mechanism 5 for fixing is arranged. The expansion mechanism 5 includes a taper member 7 that has a female screw 6 formed in a penetrating manner along the central axis, and an expansion member 8 that is externally fitted to the taper member 7. A male screw 9 formed on the outer peripheral surface of the rod 3 is screwed onto the female screw 6 of the member 7.

  Inclined surfaces 11 (only the left and right inclined surfaces 11 and 11 are shown in each drawing) are formed on four sides of the outer peripheral surface of the taper member 7, and each inclined surface 11 of the taper member 7 is an anchor. It inclines so that it may approach the central axis of the said taper member 7 toward the base end side (upper side in FIG. 1) of a volt | bolt.

  The expanding member 8 includes four contact portions 12 (in the drawings, only the left and right contact portions 12 and 12 are shown) and the tips of the contact portions 12 (lower side in FIG. 1). It is comprised with the bridge | crosslinking part 13 which connects mutually. The bridging portion 13 is located on the distal end side (lower side in FIG. 1) of the anchor bolt in the expanding member 8. Each contact portion 12 is formed with an inner surface 14 that can come into surface contact with the inclined surface 11 of the taper member 7. The inner surface 14 of the abutting portion 12 is in surface contact with the inclined surface 11 of the taper member 7 (the state shown in FIG. 3), and the taper member 7 moves toward the base end side (upper side in FIG. 3) of the anchor bolt. It is inclined so as to approach the central axis.

  The outer peripheral surface 15 of each contact portion 12 is formed in a cylindrical surface shape, and the inner surface 14 of each contact portion 12 is in surface contact with each inclined surface 11 of the taper member 7 (state shown in FIG. 3). Thus, the outer peripheral surface 15 of each contact portion 12 can be brought into surface contact with the inner peripheral surface 4 of the hole 2. Further, the expanding member 8 is a taper member as each contact portion 12 moves toward the free end side (upper side in FIG. 1) of the contact portion 12 in a free state (the state shown in FIG. 1) before being inserted into the hole 2. 7, when the expansion mechanism 5 is inserted into the hole 2, the free end side of each contact portion 12 is pressed against the inner peripheral surface 4 of the hole 2 (see FIG. 2). . The rod 3 and the taper member 7 are made of stainless steel or the like, and the spreading member 8 is made of an aluminum alloy or the like.

  The holder 17 is formed in a cylindrical shape, and the rod 3 can be inserted into the inner peripheral surface 17b of the holder 17 as shown in FIG. Of the both ends of the holder 17 in the axial direction (vertical direction in FIG. 1), when the holder 17 is inserted into the hole 2 (the state shown in FIG. 3), the end (the figure becomes the opening side of the hole 2) 1 is provided with an annular projecting portion 17a projecting laterally as a restricting means. The holder 17 is made of a steel material or the like.

  The diameter (inner diameter) of the inner peripheral surface 17b of the holder 17 is slightly larger than the outer diameter of the rod 3 of the anchor bolt. Thereby, the rod 3 of the anchor bolt can be inserted through the inner peripheral surface 17b of the holder 17 almost without resistance, and the gap between the inner peripheral surface 17b of the holder 17 and the rod 3 is small. The rod 3 can be prevented from moving laterally with respect to the holder 17. The outer diameter of the protrusion 17 a of the holder 17 is larger than the diameter (inner diameter) of the inner peripheral surface 4 of the hole 2, and when the holder 17 is inserted into the hole 2, the protrusion 17 a The holder 17 is in contact with the edge of the opening of the hole 2 so that the holder 17 does not excessively enter the inner side of the hole 2 from the position of the opening of the hole 2.

  The diameter (outer diameter) of the outer peripheral surface 17 c of the holder 17 is substantially equal to the inner diameter of the inner peripheral surface 4 of the hole 2, and the outer periphery of the holder 17 is inserted when the holder 17 is inserted into the hole 2. The gap between the surface 17c and the inner peripheral surface 4 of the hole 2 is not so much generated.

  The projecting portion 17a has an end surface 17d (FIG. 1) which is the back side of the hole 2 when the holder 17 is inserted into the hole 2 out of both end surfaces of the holder 17 in the axial direction (vertical direction in FIG. 1). Then, the lower surface is formed into an inclined surface (tapered surface). Further, the lower edge of the holder 17 is formed in an inclined surface shape (tapered surface shape) that approaches the back side of the hole 2 toward the central axis side of the holder 17. By forming the edge of the lower end of the holder 17 in the shape of an inclined surface, it is possible to prevent the edge of the lower end of the holder 17 from being caught by the edge of the opening of the hole 2 when the holder 17 is inserted into the hole 2. . By forming the lower surface 17d of the projecting portion 17a of the holder 17 into an inclined surface shape, the projecting portion 17a can easily bite into the edge of the opening of the hole 2 when the holder 17 is inserted into the hole 2. The protruding portion 17 a may not be formed over the entire circumference of the holder 17.

  Next, an example of a procedure for mounting the anchor bolt and the holder 17 in the hole 2 of the wall surface (floor surface) 1 will be described. First, the taper member 7 is screwed to the tip portion (the lower end in FIG. 1) of the rod 3 of the anchor bolt, and the expanding member 8 is externally fitted to the taper member 7. Thereafter, in a state where the expansion mechanism 5 is lowered (state shown in FIG. 1), as shown in FIG. 2, the anchor bolt is inserted into the hole 2, so The anchor bolt is inserted until it contacts the lower surface 20 of the hole 2 (see FIG. 3).

  Further, the holder 17 with the upper surface 17e facing upward is fitted to the rod 3 of the anchor bolt, and the position of the opening of the hole 2 where the upper surface 17e is substantially flush with the wall surface 1 (hereinafter referred to as a predetermined position). Until the holder 17 is inserted into the hole 2 (pressed), the holder 2 is mounted. At the time of the mounting, the protruding portion 17a of the holder 17 bites into the edge of the opening of the hole 2 (state shown in FIG. 3).

  In the mounted state, as shown in FIG. 3, a bracket 21 for fixing equipment or piping (not shown) is passed through the anchor bolt rod 3, and a nut 22 is screwed onto the bracket 21. The nut 22 is tightened with a tool such as a wrench (spanner). Then, as the nut 22 is tightened, the rod 3 and the taper member 7 are raised (moved) to the opening side of the hole 2 (the base end side of the anchor bolt: the upper side in FIG. 3). As a result, the anchor bolt is fixed to the inner peripheral surface 4 of the hole 2.

  At this time, the rod 3 of the anchor bolt can pass through (insert through) the inner peripheral surface 17b of the holder 17 with almost no resistance, and therefore, friction between the rod 3 and the inner peripheral surface 17b of the holder 17 Therefore, it is possible to suppress the holder 17 from moving as the rod 3 moves up. Further, the bracket 17 (nut 22) can also prevent the holder 17 from rising. In addition, when the protrusion 17a of the holder 17 hits the edge of the opening of the hole 2, the holder 17 is also prevented from descending from the position of the opening of the hole 2 (downward in FIG. 3). It is done. Accordingly, the holding tool 17 maintains the mounting state at the predetermined position.

  Further, the protrusion 17 a of the holder 17 bites into the edge of the opening of the hole 2, so that the protrusion 17 a comes into close contact with the edge of the opening of the hole 2. As a result, the holder 17 is restrained from moving in the lateral direction (left and right in FIG. 3), and the holder 17 reliably suppresses the swing of the rod 3 of the anchor bolt.

  Since the rod 3 swings around the tip (the position of the taper member 7 in FIG. 3), the holder 17 is mounted as far as possible from the tip of the rod 3 in order to effectively suppress the swing. Is preferred. Since the holder 17 of the present invention can be mounted at the position of the opening of the hole 2 farthest from the tip of the rod 3 (that is, the predetermined position), the rod 3 can be shaken by that amount. It can suppress firmly and it can suppress that the apparatus etc. which are fixing to the rod 3 of an anchor bolt rattle by the shaking of the said rod 3 are suppressed.

  Further, the nut 22 is loosened by the swing of the rod 3 of the anchor bolt, and the rod 3 and the taper member 7 are prevented from descending, and the inclined surface 11 of the taper member 7 is expanded by the descent of the taper member 7. The force that presses the inner surface 14 of the contact portion 12 of the opening member 8 is weakened, and the surface contact state between the outer peripheral surface 15 of the contact portion 12 and the inner peripheral surface 4 of the hole 2 is prevented from loosening. Thereby, it is possible to prevent the anchor bolt from easily coming out of the hole 2 due to the looseness of the nut 22.

  The anchor bolt enters the hole 2 in a state where the expanding member 8 is elastically deformed, and each contact portion 12 is pressed against the inner peripheral surface 4 of the hole 2 by the elastic restoring force. Therefore, even if the taper member 7 is raised, the expansion member 8 is restrained from moving upward, and thereby each inclined surface 11 of the taper member 7 is firmly pressed against the inner surface 14 of each contact portion 12. The outer peripheral surface 15 of each contact portion 12 can be reliably pressed against the inner peripheral surface 4 of the hole 2.

  Further, as shown in FIG. 4, for example, the restricting means is made of fluorine rubber or the like that allows the rod 3 of the anchor bolt to be inserted further into the hole 2 (lower side in FIG. 4) than the holder 17. A cylindrical elastic body 23 may be disposed. That is, the elastic body 23 is configured such that the anchor bolt rod 3 is inserted inside the inner peripheral surface 23a. The outer diameter of the elastic body 23 is larger than the inner diameter of the hole 2, whereby the elastic body 23 is pressed against the inner peripheral surface 4 of the hole 2, and the inner side of the hole 2 is moved to the inner side by friction at that time. It becomes difficult to move.

  An example of a procedure for attaching the holder 17 and the elastic body 23 to the hole 2 will be described. First, the elastic body 23 is fitted into the rod 3 of the anchor bolt, and the proximal end side (the upper side in FIG. 4) of the rod 3. The holder 17 is fitted. Then, the elastic body 23 and the holder 17 together with the anchor bolts are inserted (pressed) into the hole 2 and held up to the position of the opening of the hole 2 where the upper surface 17e of the holder 17 is substantially flush with the wall surface 1. The tool 17 is pushed into the hole 2. At that time, the elastic body 23 is pushed to a position where it comes into contact with the end face (the lower end face in FIG. 4) of the hole 2 in the holder 17.

  As a result, the holder 17 is received by the elastic body 23 even if it tries to enter the back side (lower side in FIG. 4) of the position of the opening of the hole 2 (the predetermined position), and the holder 17 is received by the hole 2. It is restricted from entering the back side of and is maintained at the predetermined position. In this embodiment, the protrusion 17a of the holder 17 may be omitted.

  For example, as shown in FIG. 5, as a restricting means, a groove 24 is formed in the circumferential direction of the inner peripheral surface 17b of the holder 17, and a ring-shaped elastic body made of fluororubber or the like is formed in the groove 24. (Hereinafter referred to as a ring body) 25 may be arranged. In that case, when the holder 17 is fitted to the rod 3 of the anchor bolt, the ring body 25 comes into contact with the male screw 9 of the rod 3 to fill the gap between the holder 17 and the rod 3 of the anchor bolt. Thereby, it is possible to more firmly suppress the rod 3 from shaking by the holder 17.

  Further, since the ring body 25 is easily deformed when it comes into contact with the rod 3 of the anchor bolt, it is possible to prevent the ring body 25 from interfering with the insertion of the holder 17 of the rod 3.

  Instead of the ring body 25, for example, an internal thread that is screwed to the external thread 9 of the rod 3 may be formed on the inner peripheral surface 17 b of the holder 17. In this case, the holder 17 and the rod 3 of the anchor bolt can be more closely adhered to each other, and the rod 3 can be prevented from shaking by the holder 17.

  The edge of the opening of the hole 2 may be cut into an inclined surface (tapered surface). Since the edge of the opening of the hole 2 is cut, the holder 17 can be easily inserted into the hole 2 up to the predetermined position.

  The mechanism for fixing the anchor bolt to the inner peripheral surface 4 of the hole 2 is not limited to the configuration of the expansion mechanism 5, for example, the taper member 7 is configured in a truncated cone shape, The expanding member 8 may be configured to be C-shaped in a cross section that is fitted around the truncated cone-shaped taper member 7.

  The taper member 7 and the rod 3 may be integrally formed. In that case, the male screw 9 may not be formed on the rod 3. Further, the male screw 9 may be formed only on a part of the tip of the rod 3 or the like.

DESCRIPTION OF SYMBOLS 1 Wall surface 2 Hole 3 Anchor bolt rod 17 Holding | maintenance tool 17a Protrusion part 17b Inner peripheral surface 17d Lower surface of protrusion part 23 Elastic body 24 Groove 25 Ring body (elastic body)

Claims (5)

A holding means for holding the anchor bolt inserted and fixed in the hole (2) provided in the wall surface (1),
It has a cylindrical holder (17) that holds the anchor bolt in a state of being inserted into the hole (2), and the holder (17) is located on the inner side of the inner peripheral surface (17b). Bolt rod (3) can be inserted,
Anchor bolt holding means, characterized by having restricting means for restricting entry of the holder (17) into the back side of the hole (2).   Of the both ends in the axial direction of the holder (17), when the holder (17) is inserted into the hole (2), it projects laterally to the end that becomes the opening side of the hole (2). The restricting means is configured by providing a projecting portion (17a) that makes the outer diameter of the projecting portion (17a) larger than the inner diameter of the hole (2). Anchor bolt holding means.   The projecting portion (17a) becomes the back side of the hole (2) when the holder (17) is inserted into the hole (2) of both end surfaces in the axial direction of the holder (17). The anchor bolt holding means according to claim 2, wherein the end face (17d) is formed in an inclined surface. By arranging a cylindrical elastic body (23) through which the rod (3) can be inserted further into the hole (2) than the holder (17), the restricting means is configured. And
The anchor bolt holding means according to any one of claims 1 to 3, wherein an outer diameter of the elastic body (23) is larger than an inner diameter of the hole (2). A groove (24) is formed in the circumferential direction of the inner peripheral surface (17b) of the holder (17), and an easily deformable ring-shaped elastic body (25) is disposed in the groove (24). Constitutes a means of regulation,
The means for holding an anchor bolt according to claim 2 or 3, wherein the elastic body (25) is capable of contacting the rod (3) through which the holder (17) is inserted. .