JP5080670B2 - Anchor bolt and method of using anchor bolt - Google Patents

Description

  The present invention is arranged in a vertical direction in a space between a pair of opposing molds used for forming a cloth foundation concrete for a house and the like, and the lower part is embedded and fixed in the concrete to be driven between the molds. The present invention relates to an anchor bolt whose upper portion protrudes from concrete and a method of using the anchor bolt.

  As a conventional anchor bolt, for example, as shown in Patent Document 1, an upper reinforcing member having a required diameter and length provided with an external thread on the upper outer periphery, and a radial facing on the outer periphery on the lower end side of the upper reinforcing member There is known one provided with a pair of lower bar members which are fixedly welded at positions and extend in parallel to and opposite to the upper bar members. The anchor bolt is arranged at the center position between the molds by inserting the lower reinforcement member between the pair of molds and sandwiched between the foundation reinforcing bars arranged horizontally, and the upper reinforcement member is located at the upper end of the pair of molds. Positioning is performed by being inserted through a central hole of a positioning fitting provided on the side. By placing concrete between the molds, the lower reinforcement member is embedded and fixed in the concrete, and the upper reinforcement member protrudes on the concrete. The wooden foundation of the building is arranged on the fabric foundation concrete formed in this way, and further, pillars, braces, beams and the like are assembled on the foundation. The upper member of the anchor bolt extends through the base take-out hole to position the base, and the tip side of the anchor bolt is connected to a hole-down metal fitting attached to the pillar to increase the standing strength of the pillar. ing.

Japanese Utility Model Publication No. 2-33381

  By the way, as shown in FIG. 6, the pillar 2 and the brace 3 assembled on the base 1 are connected and reinforced by the brace 4, but the upper bar member 6 protruding on the base 1. And the brace 4 intersect. Therefore, the attachment of the brace 4 is obstructed by the upper bar member 6 and becomes difficult. As a result, there is a problem that the attachment time of the brace 4 becomes long or the attachment accuracy varies. Further, if the upper bar member is too long, the support by the positioning metal fittings when placing the concrete becomes unstable, so that the length of the upper bar member has been conventionally suppressed. Therefore, as shown in FIG. 7, the mounting position of the hole-down fitting 8 that connects the upper reinforcing member 6 to the column 2 is lowered, and is obstructed by the upper reinforcing member 6 or the brace 4 to the column 2 of the hole-down fitting 8. Is difficult, and the mounting position of the hole-down fitting 8 is limited, so that there is a problem that the mounting position of the upper bar member 6 attached to the hole-down metal fitting 8 deviates from the center position of the base 1. In response to this, a method has been adopted in which the mounting position of the hole-down fitting 8 is moved upward, and the muscle member 9 is added to the upper reinforcement member 6 via a long nut or the like and attached to the hole-down fitting 8. The mounting effort is complicated and the mounting cost is expensive.

  The present invention is intended to solve the above-mentioned problem, and after placing the fabric foundation concrete, the work of fixing the braces and hole-down fittings to the columns and braces arranged on the foundation is performed in a short time and with high accuracy. An object of the present invention is to provide an anchor bolt that can be executed and a method of using the anchor bolt.

  The structural feature of the present invention is that a cylindrical long nut member aligned in the axial direction with the muscle member is formed on the pair of muscle members at one end side of the pair of muscle members arranged in parallel with each other at a predetermined interval. It is sandwiched and fixed, and one end side in the axial direction of the long nut member slightly protrudes from one end of the muscle member and the other end side is sealed, between a pair of opposing molds for forming cloth foundation concrete An anchor bolt main body, which is arranged vertically in the middle position with one end side of the long nut member facing upward, and is embedded and fixed in concrete placed between the molds, and coaxially with one end of the long nut member and An intermediate member having a truncated conical shape and having a shaft hole, and a central shaft member that is inserted into the shaft hole of the intermediate member and is screwed into the screw hole of the long nut member by the screw groove on the distal end side; The long nut is screwed into the thread of the central shaft member A nut that fixes the intermediate member with the intermediate member, and a fixed length screw that is screwed into the screw hole of the long nut member with the central shaft member, the nut, and the intermediate member removed from the anchor bolt body. And a screw bolt member.

  As a method of using the anchor bolt according to the present invention, a pair of cylindrical long nut members aligned in the axial direction with the muscle members are arranged at one end side of the pair of muscle members arranged in parallel with each other at a predetermined interval. The anchor bolt body, which is sandwiched between the muscle members and fixed, with one end side in the axial direction of the long nut member protruding slightly from one end of the muscle member and the other end side sealed, is opposed to the fabric foundation concrete formation An intermediate member, which is vertically arranged with one end side of the long nut member facing upward at the center position between the pair of molds, is conical and has a shaft hole. A central shaft member that is overlapped in a stand state and has a thread groove on the distal end side is inserted into the shaft hole of the intermediate member, the distal end side is screwed into the thread hole of the long nut member, and the nut is threaded groove on the central shaft member And the intermediate member is The anchor bolt body and the intermediate member are buried in the concrete by placing concrete between the molds in this state, and the anchor bolt body and the intermediate member are buried in the concrete. The intermediate member is removed, and then both screw bolt members of a predetermined length are screwed into the screw holes of the long nut member at one end.

  In the present invention configured as described above, a state in which a plurality of foundation reinforcing bars are arranged in parallel and horizontally to the formwork at the center position of the space between a pair of formwork erected opposite to each other on the ground. Thus, the anchor bolt body is fitted to the base reinforcing bar between the pair of muscle members, and the lower nut of the long nut member hits the upper foundation reinforcing bar so that the base reinforcing bar is sandwiched between the pair of muscle members. The Furthermore, before placing the concrete, the intermediate member is superimposed on the upper end of the long nut member coaxially and in the inverted truncated cone state, and a central shaft member having a thread groove on the tip side is inserted through the shaft hole of the intermediate member, The front end side is screwed to the long nut member, and the intermediate member is sandwiched and fixed between the long nut member and the nut by tightening with a nut screwed to the thread groove of the central shaft member. The center shaft member is positioned so that the anchor bolt does not move by being inserted into the center hole of the positioning fitting attached to the upper end of the mold, and then the concrete is driven to a predetermined height position of the intermediate member. In this way, when the concrete is placed, the openings of the long nut member and the intermediate member are closed, so that the concrete does not flow into the inside. In addition, since the pair of reinforcing members sandwich the foundation rebar, the anchor bolt is reliably arranged at the center position in the width direction of the fabric foundation concrete.

  After the concrete is hardened, the central shaft member and the nut are removed, and the intermediate member is taken out, so that the upper end of the long nut member is exposed in the remaining concrete hole. Since the intermediate member is embedded in the concrete in the inverted truncated cone state, it can be easily taken out from the concrete by rotating around the axis. Thereafter, the wooden base of the building is disposed on the fabric foundation concrete, and further, columns and braces are disposed thereon, and bracing brackets are attached between the columns and the braces. At that time, since the anchor bolt does not protrude from the extraction hole of the base, there is nothing to obstruct when attaching the brace between the pillar and the brace, so that the brace is attached in a short time and with high reliability.

  After the brace fitting is attached, both screw bolt members of a predetermined length are screwed into the shaft hole of the long nut member, but the length of both screw bolt members can be selected regardless of the central shaft member. it can. For this reason, the mounting position of the hole-down metal fitting to the pillar can be appropriately provided at a position that does not cross the brace fitting, so that the mounting of the hole-down metal fitting to the pillar can be performed in a short time with high accuracy, and both screw bolt members Is securely placed in the center of the column. As a result, in the present invention, the reinforcement of the columns and braces attached to the base by the anchor bolts, bracing brackets, and holding brackets is performed in a short time and with high reliability. Further, since the intermediate member and the central shaft member can be used a plurality of times, the member cost is reduced.

  In the present invention, the intermediate member is preferably made of resin. Thus, since the intermediate member is manufactured at low cost by using an inexpensive and easy-to-process resin as the material, the intermediate member is provided at low cost.

  Moreover, in this invention, it is preferable to provide the dent matched with the external shape of the nut in the contact end side with the nut of an intermediate member. Thereby, when removing a nut using tools, such as a spanner, an intermediate member can also be easily removed by rotating integrally with a nut. In addition, although the hexagon matched to the shape of the nut is preferable as the recess, it may be matched to a part of the shape of the nut so as to be sandwiched by a tool.

  Moreover, in this invention, it is preferable that a nut is fixed to the predetermined position of the thread groove of a center shaft member. Thus, when the central shaft member is attached to the long nut member, the nut abuts on the upper end of the intermediate member, so that the degree of insertion of the central shaft member into the long nut member does not adjust the mounting position of the nut one by one. It is convenient because it is determined automatically.

  According to the present invention, when placing concrete, by connecting the intermediate member and the central shaft member to the long nut member of the anchor bolt main body, the concrete can be placed at an appropriate height. The screw member can be attached to the shaft hole of the long nut member by removing the shaft member, the nut and the intermediate member. As a result, in the present invention, there is no obstacle to attaching the braces and hole-down fittings to the columns and braces arranged on the fabric foundation concrete. Often done. Further, according to the present invention, since the intermediate member and the central shaft member can be used a plurality of times, the member cost can be reduced, and the cost can be further reduced by using the intermediate member made of resin. Furthermore, in the present invention, by providing a recess in accordance with the outer shape of the nut on the contact end side of the intermediate member with the nut, the intermediate member can be easily removed by rotating integrally with the nut. Further, in the present invention, the nut is fixed at a predetermined position of the thread groove of the central shaft member, so that the degree of insertion of the central shaft member into the long nut member is automatically adjusted without adjusting the mounting position of the nut one by one. It is convenient because it can be decided.

It is a disassembled front view which shows the combination of the structural component of the anchor bolt before the concrete placement which is one Example of this invention. It is a top view which shows an anchor bolt main body. It is a partially broken front view which shows the state at the time of concrete placement using an anchor bolt. It is a partially broken front view which shows the state by which the anchor bolt main body after the concrete placement was embed | buried. It is a partially broken front view which shows the final state of the anchor bolt after concrete placement. It is explanatory drawing explaining the state which the conventional anchor bolt and a brace | joint mutually interfere. It is explanatory drawing explaining the state which the conventional bracing metal fitting and a hole down metal fitting mutually.

  Embodiments of the present invention will be described below. FIG. 1 is a front view showing components of an anchor bolt before placing concrete according to an embodiment, and FIG. 2 is a plan view showing an anchor bolt body. FIG. 3 shows a partially broken front view of the anchor bolt in use during concrete placement, and FIG. 4 shows a partially broken front view of the anchor bolt body after concrete placement. 5 is a partially broken front view showing the final arrangement state of the anchor bolts.

  The anchor bolt has an anchor bolt main body 11, and a component attached to the anchor bolt main body 11 can be replaced before and after placing concrete, and one member that combines both of them. It is. Here, in order to distinguish between before and after placing concrete, the anchor bolt 10A is shown before placing and the anchor bolt 10B is shown after placing. The anchor bolt main body 11 has two reinforcing bar members 12 arranged in parallel with each other at a predetermined interval slightly wider than the thickness of a basic reinforcing bar 23 described later. An iron long nut member 13 is sandwiched between the bar members 12 in the axial direction between them (on the upper end side in FIG. 1), and is fixed to the bar members 12 by welding. The long nut member 13 has a hexagonal column shape and has a threaded groove formed in a shaft hole 13a penetrating the shaft center. One end side slightly protrudes from one end of the muscle member 12, and the other end side (the bottom end side in FIG. 1). ) And a thin cap-shaped cap member 14 made of a resin is fitted together to seal the lower end opening. In addition, although it becomes expensive instead of the cap member 14, a metal plate may be fixed by welding or the like. An intermediate member 16 is superimposed on the upper end surface of the long nut member 13.

  The intermediate member 16 has a truncated cone shape made of resin, and has a shaft hole 16 a that penetrates an axis that is slightly larger in diameter than the shaft hole 13 a of the long nut member 13. At the end of the intermediate member 16 on the large diameter side, there is provided a recess 16b that can be sandwiched with a spanner or the like for taking out while rotating from the concrete. The recess 16b has a hexagonal columnar shape that matches the outer peripheral shape of the nut 19 described later. Alternatively, a part of the concave portion 16b matches the outer peripheral shape of the nut 19 so that a spanner or the like can be fitted. Good. Since the intermediate member 16 is manufactured at low cost by using an inexpensive resin, the intermediate member 16 is provided at low cost. The intermediate member 16 is superimposed on the upper end surface of the long nut member 13 coaxially in an inverted truncated cone state. The central shaft member 18 is a long iron round bar having the same diameter as the shaft hole 13a of the long nut member 13, and a screw groove 18a is formed in a predetermined range in the axial direction on the lower end side. It can be screwed into the hole 13a. A nut 19 is fixed to the inner end side of the thread groove 18a by welding or the like. The length from the tip of the screw groove 18a to the position of the nut 19 is slightly shorter than the combined length of the shaft hole 13a of the long nut member 13 and the shaft hole 16a of the intermediate member 16.

  Both screw bolt members 21 are long iron round bars, and are provided with thread grooves 21a within a predetermined length from both ends in the axial direction. After the concrete bolting, both the screw bolt members 21 are removed from the long nut member 13 together with the nut 19 and the intermediate member 16 is also removed from the concrete K1 and K2, and then the shaft hole 13a of the long nut member 13. The screw groove 21a is used for screwing. The other screw groove 21a of both screw bolt members 21 is screwed to a hole-down fitting attached to the pillar.

Next, usage examples of the anchor bolts 10A and 10B will be described.
As shown in FIG. 3, two upper and lower foundation reinforcing bars 23 are arranged in parallel and horizontally to the mold 25 at the center of the space between a pair of molds 25 that are erected opposite to each other on the ground. In this state, the anchor bolt main body 11 is inserted and fitted into the basic reinforcing bar 23 between the pair of reinforcing members 12, and the cap member 14 provided at the lower end of the long nut member 13 comes into contact with the upper basic reinforcing bar 23, thereby It arrange | positions in the state which pinched | interposed the basic | foundation reinforcement 23 between the muscle members 12 of this. Further, before placing the concrete, the intermediate member 16 is coaxially overlapped with the upper end of the long nut member 13 in the inverted truncated cone state, and then the central shaft member 18 to which the nut 19 is fixed is the shaft hole 16a of the intermediate member 16. And is screwed to the long nut member 13 at the screw groove 18a on the distal end side. As a result, the intermediate member 16 is clamped by the nut 19 and is fixed between the nut 19 and the long nut member 13.

  As shown in FIG. 3, the center shaft member 18 is positioned so that the anchor bolt 10A does not move by being inserted into the center hole of the positioning bracket 26 attached by the mounting jig 27 across the upper ends of both mold frames 25. After that, concrete is driven to a position near the upper end of the intermediate member 16 between the two molds 25. In placing concrete, the concrete K1 is first placed to the vicinity of the target height, and then the leveler K2 is poured to adjust to the target height. In addition, since the lower end opening of the long nut member 13 is closed by the cap member 14 when the concrete is placed, the concrete does not flow into the long nut member 13. In addition, since the pair of reinforcing members 12 sandwich the two upper and lower foundation reinforcing bars 23, the anchor bolt 10A is reliably arranged at the center position in the width direction of the cloth foundation concrete K1, K2.

  After the concrete is hardened, the central shaft member 18 is removed together with the nut 19 and the intermediate member 16 is taken out. As shown in FIG. 4, the long nut member 13 is inserted into the remaining holes H of the cloth foundation concrete K1 and K2. The upper end is exposed. Thereafter, the wooden base 1 of the building is disposed on the fabric foundation concrete K1 and K2, and the pillar 2 and the brace 3 as shown in FIG. 6 are further disposed thereon. At that time, the base 1 is taken out. Since the anchor bolt does not protrude from the hole, there is nothing that obstructs the attachment of the brace 4 between the pillar 2 and the brace 3. Therefore, the brace 4 is attached in a short time and with high reliability. After the brace 4 is attached, as shown in FIG. 5, both screw bolt members 21 having a predetermined length are screwed into the shaft hole 13a of the long nut member 13 on one end side to become the anchor bolt 10B.

  The lengths of both screw bolt members 21 can be selected regardless of the central shaft member 18. Therefore, since the mounting position of the hole-down fitting 8 as shown in FIG. 7 can also be provided at a position that does not intersect with the brace fitting 4, the mounting of the hole-down fitting 8 to the pillar 2 is performed in a short time and with high accuracy. Both screw bolt members 21 are securely arranged at the center position of the pillar. As a result, in the present embodiment, the reinforcement of the column 2 and the brace 3 attached to the base 1 by the anchor bolt 10B, the brace 4 and the holding brace 8 is performed in a short time and with high reliability. Further, since the intermediate member 16 and the central shaft member 18 can be used a plurality of times, the member cost is reduced. Further, in this embodiment, since the pair of reinforcing members 12 are embedded in the concrete with the foundation rebar 23 interposed therebetween, deformation when the anchor bolt 10B receives a vertical force is suppressed. There is no crack or the like, and the reliability of the fabric foundation concrete K1, K2 can be secured.

  In the above embodiment, the material of the intermediate member is resin, but it can be made of metal although it is expensive instead. Moreover, in the said Example, although the nut is being fixed to the center axis | shaft member, you may detachably screw. In addition, in the said Example, it does not specifically limit about the specific shape of an anchor bolt, etc., In the range which does not deviate from the meaning of this invention, it can change and implement variously.

  The anchor bolt of the present invention is capable of placing concrete at an appropriate height by connecting the intermediate member and the central shaft member to the long nut member of the anchor bolt body at the time of placing the concrete. Since the central shaft member can be removed and the intermediate member can be taken out and both screw bolt members can be attached, mounting of bracing brackets and hole-down fittings to pillars and braces after concrete placement is performed in a short time and with high reliability, The intermediate member and the central shaft member are useful because they can be used a plurality of times and the member cost can be reduced.

DESCRIPTION OF SYMBOLS 10A, 10B ... Anchor bolt, 11 ... Anchor bolt main body, 12 ... Muscle member, 13 ... Long nut member, 14 ... Cap member, 16 ... Intermediate member, 18 ... Center shaft member, 19 ... Nut, 21 ... Both screw bolt member , 23 ... foundation rebar, 25 ... formwork.

Claims (8)

At one end side of a pair of muscle members arranged in parallel with each other at a predetermined interval, a cylindrical long nut member aligned in the axial direction with the muscle member is sandwiched and fixed between the pair of muscle members. The axial end of the long nut member slightly protrudes from one end of the muscle member and the other end is sealed, and the central position between a pair of opposing molds for forming cloth foundation concrete is An anchor bolt main body that is disposed in the vertical direction with one end side of the long nut member facing upward, and is embedded and fixed in concrete placed between the molds,
An intermediate member having an axial hole in the shape of a truncated cone concentrically and overlapped at one end of the long nut member, and the long nut inserted through the axial hole of the intermediate member and threaded on the tip side A central shaft member that is screwed into a screw hole of the member, a nut that is screwed into a screw groove of the central shaft member, and sandwiches and fixes the intermediate member between the long nut member;
A double screw bolt member having a predetermined length screwed into a screw hole of the long nut member in a state where the central shaft member, the nut and the intermediate member are removed from the anchor bolt main body;
An anchor bolt characterized by providing   The anchor bolt according to claim 1, wherein the intermediate member is made of resin.   3. The anchor bolt according to claim 1, wherein a recess corresponding to an outer shape of the nut is provided on a contact end side of the intermediate member with the nut.   The anchor bolt according to any one of claims 1 to 3, wherein the nut is fixed to a predetermined position of a thread groove of the central shaft member. At one end side of a pair of muscle members arranged in parallel with each other at a predetermined interval, a cylindrical long nut member aligned in the axial direction with the muscle member is sandwiched and fixed between the pair of muscle members. The anchor bolt body in which one axial end side of the long nut member slightly protrudes from one end of the muscle member and the other end side is sealed is a center position between a pair of opposing molds for forming cloth foundation concrete. In the vertical direction with one end side of the long nut member up,
An intermediate member having a truncated cone shape and a shaft hole is overlapped on one end of the long nut member coaxially and in an inverted truncated cone shape,
A central shaft member having a thread groove on the distal end side is inserted through the shaft hole of the intermediate member, and the distal end side is screwed into the screw hole of the long nut member,
A nut is screwed into the screw groove of the central shaft member, and the intermediate member is sandwiched and fixed between the nut and the long nut member, and in this state, concrete is placed between the molds. The anchor bolt body and the intermediate member are embedded in the concrete,
After the concrete is cast, the central shaft member, the nut and the intermediate member are removed, and then both screw bolt members of a predetermined length are screwed into the screw holes of the long nut member at one end. How to use anchor bolts.   The method of using an anchor bolt according to claim 5, wherein the intermediate member is made of resin.   The method for using an anchor bolt according to claim 5 or 6, wherein a recess that matches the outer shape of the nut is provided on a contact end side of the intermediate member with the nut.   The method of using an anchor bolt according to any one of claims 5 to 7, wherein the nut is fixed at a predetermined position of a thread groove of the central shaft member.

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