JP7057638B2 - Anchor bolt set - Google Patents

Description

The present invention relates to an anchor bolt set having a plurality of anchor portions.

Patent Document 1 discloses an anchor bolt provided with a buried portion fixed in concrete and a binding portion exposed to the outside, and the buried portion is bifurcated and the binding portion is integrally provided at the top thereof. .. It is also disclosed that the buried portion bends the reinforced concrete steel bar into an inverted V shape and fixes the base portion of the binding portion to the top thereof. Furthermore, it is also disclosed that the binding portion can be removed.

Japanese Patent Application Laid-Open No. 2003-129574

However, since the anchor bolt disclosed in Patent Document 1 is bent bifurcated, when the anchor bolt is set in the formwork, it interferes with the reinforcing bar already assembled in the formwork. , May not be set properly.

In view of the above circumstances, it is an object of the present invention to provide an anchor bolt set in which interference with the reinforcing bars already assembled in the formwork is unlikely to occur when the anchor bolts are set in the formwork.

The anchor bolt set of the present invention has a plurality of anchor portions in order to solve the above-mentioned problems, and the lower end side of the plurality of anchor portions is an anchor bolt set in which the lower end side is wider than the upper end side. It is characterized in that at least one of the plurality of anchor portions is detachably provided with respect to the support member that supports the plurality of anchor portions.

In the above configuration, at least one of the plurality of anchor portions is detachably provided with respect to the support member supporting the plurality of anchor portions, so that the anchor portions are already assembled in the formwork. Even if it may interfere with the reinforcing bar, the anchor part is removed from the support member, the remaining part is set on the formwork while avoiding interference with the reinforcing bar, and then the removed anchor part is removed. It can be attached to the support member. Further, it is also possible to prepare a plurality of types of the support members having different spread angles, select a support member having a spread angle that does not interfere with the reinforcing bar, and install the anchor bolt set. Further, since the remaining portion is lighter than the original weight of the anchor bolt set, the work load for installing the anchor bolt set is also reduced.

Further, the anchor bolt set of the present invention has a plurality of anchor portions, and the lower end side of the plurality of anchor portions is an anchor bolt set that expands to each other as compared with the upper end side, and supports the plurality of anchor portions. At least one of the plurality of anchor portions is provided so as to be swingable with respect to the support member.

In the above configuration, at least one of the plurality of anchor portions is provided swingably with respect to the support member supporting the plurality of anchor portions, so that the anchor portion is already in the formwork. Even if it may interfere with the assembled reinforcing bar, swing the anchor part to narrow the angle of spread, set it on the formwork while avoiding interference with the reinforcing bar, and then set the anchor part on the formwork. Can be oscillated to appropriately adjust the angle of spread.

The support member may be provided with a pressing portion that presses the upper end portion of the swingable anchor portion in a direction in which the lower end side thereof expands. According to this, the angle of the spread of the swingable anchor portion can be easily adjusted by operating the pressing portion. Further, since the support member exists on the upper side of the anchor bolt set, it is easy to operate the pressing portion.

An inclined portion may be provided to diagonally support the upper end portion of the swingable anchor portion. According to this, the swingable anchor portion can be easily expanded to a predetermined angle by the inclined portion.

The support member may have a substantially L-shape in a plan view and may be provided with three anchor portions. Such an anchor bolt set can be suitably used at the corner portion of the foundation.

A bolt portion protruding from the upper surface of the foundation may be provided detachably from the support member. According to this, the remaining portion can be made lighter than the original weight of the anchor bolt set.

According to the present invention, when the anchor bolt set is set in the formwork, it is possible to prevent interference with the reinforcing bars already assembled in the formwork.

It is a figure which showed the concrete foundation using the anchor bolt set which concerns on embodiment of this invention, FIG. The explanatory view and the figure (C) are schematic explanatory views of BB arrow viewing. It is explanatory drawing which showed the influence range of the pull-out proof stress by the anchor bolt set of FIG. 1, and also showed the influence range of the pull-out proof stress by two conventional anchor bolts for reference. It is explanatory drawing which showed the attachment of the anchor part to the support member of the anchor bolt set of FIG. It is explanatory drawing which showed the upper side of the anchor bolt set of another embodiment. It is a figure which showed the corner part of the concrete foundation using the anchor bolt set of another embodiment, and the figure (A) shows the schematic explanatory view and the partially enlarged view by the plane, and the figure (B). Is a schematic explanatory view of CC arrow view. It is explanatory drawing which showed the swing operation of the anchor part of the anchor bolt set of another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1A, 1B and 1C, the anchor bolt set 1 according to this embodiment is embedded in, for example, a concrete foundation 8 to support and fix a column base or the like. Used for. The anchor bolt set 1 includes a plurality of (for example, two) anchor portions 3 on the lower side of the support member 2, and one bolt portion 4 on the upper side of the support member 2.

The support member 2 and the anchor portion 3 of the anchor bolt set 1 are located in the concrete foundation 8, and the bolt portion 4 projects from the upper surface of the concrete foundation 8. Further, in the concrete foundation 8, an upper main bar 81, a lower main bar 82, a vertical bar 83, and the like are provided. The concrete foundation 8 is in a state in which the upper main bar 81, the lower main bar 82, the vertical bar 83 and the like are assembled in a form (not shown), and the anchor bolt set 1 is supported by a ruler or the like (not shown). Then, concrete is poured into the above formwork to produce it.

As shown in FIG. 2, the anchor bolt set 1 has two anchor portions 3, and the lower end side of the two anchor portions 3 has a structure in which the lower end side is wider than the upper end side. ing. As a reference drawing, a drawing surrounded by virtual lines simply shows a concrete foundation 9 in which two anchor bolts 91 are vertically provided. With such a concrete foundation 9, the pull-out strength of the above two anchor bolts 91 is shown. The range of the upper surface of the foundation equivalent to the range of the upper surface of the foundation (see the hatching portion) that affects the above can be obtained with the above-mentioned one anchor bolt set 1. Further, if the two anchor bolts 91 are to be detachably provided on the support member, the support member becomes longer and heavier than the support member 2. In other words, in the case of the anchor bolt set 1, pulling out equivalent to providing a plurality of general anchor bolts in parallel while reducing the size of the support member 2 as much as possible by using one bolt portion 4 as one. You will be able to gain strength.

As shown in FIG. 3, for example, the support member 2 is made of a metal block body having a hexahedral shape having a rectangular plan view. A bolt tap hole 21 penetrating in the vertical direction is formed at the center position of the support member 2, and the lower side of the support member 2 is located at two locations on both sides of the tap hole 21 in the longitudinal direction. Anchor tap holes 22, 22 are formed in diagonal directions so as to be separated from each other.

The bolt portion 4 can be screwed into the bolt tap hole 21 in the field, for example. Of course, the bolt portion 4 may be transported to the site in a state of being screwed into the bolt tap hole 21, or the bolt portion 4 may be provided in a fixed state in the bolt tap hole 21. It is a thing.

A screw portion is formed on the upper portion of the anchor portion 3, and this screw portion can be screwed into the anchor tap hole 22. The two anchor portions 3 screwed in this way are arranged so that the lower end side is wider than the upper end side. It should be noted that both of the two anchor portions 3 are not limited to being attached to and detached from the support member 2, and at least one of the two anchor portions 3 may be detachably provided to the support member 2. Further, one of the above two anchor portions 3 may be vertically arranged and the other one may be inclinedly arranged, and such an anchor bolt set 1 can be used at the end portion of the foundation 8.

In the above configuration, at least one of the plurality of anchor portions 3 is detachably provided with respect to the support member 2 that supports the plurality of anchor portions 3, so that the anchor portion 3 is the formwork. Even if it may interfere with the reinforcing bars already assembled inside (upper main bar 81, lower main bar 82, vertical bar 83, etc.), the anchor portion 3 is removed from the support member 2, and the remaining portion is replaced with the reinforcing bar. The anchor portion 3 can be set on the mold while avoiding the interference of the above, and then the removed anchor portion 3 can be attached to the support member 2. Further, as the support member 2, a plurality of types having different spread angles of the anchor tap holes 22 are prepared, and the support member 2 having a spread angle that does not interfere with the reinforcing bar is selected and the anchor bolt 3 is attached. It is also possible to install set 1. Further, since the remaining portion is lighter than the original weight of the anchor bolt set 1, the work load for installing the anchor bolt set 1 is also reduced.

FIG. 4 shows another example of the anchor bolt set 1. The support member 2A of the anchor bolt set 1 is formed by arranging three conical long nuts 23 in one vertical plane and welding and fixing them to each other with the small diameter side facing up. The bolt portion 4 is screwed onto the upper side of the central long nut 23. Further, the upper end portion of the anchor portion 3 is screwed into the lower side of the long nuts 23 on both sides. The support member 2A using such a long nut 23 can be manufactured at a relatively low cost as compared with the support member 2. Further, in the anchor bolt set 1 having the support member 2A, the bolt portion 4 may be fixedly provided.

5 (A) and 5 (B) show the corners of the concrete foundation 8. The anchor bolt set 1 used in this corner portion includes a support member 2B made of a block member having a substantially L-shape in a plan view. In the support member 2B, for example, three tap holes are formed so that the line connecting the centers forms a triangle. The tap hole at the center position is formed in the vertical direction, and for example, the upper end screw portion of the anchor portion 3 screwed into the tap hole can be projected upward to form a bolt portion 4A. Further, the tap hole adjacent to the tap hole at the center position is formed in an oblique direction so as to be separated from the tap hole at the center position toward the lower side, and the screw of the anchor portion 3 is formed in the inclined tap hole. The parts are screwed together. That is, in this example, three anchor portions 3 are arranged in a triangular shape by one support member 2B, and the three anchor portions 3 are parallel to the extending direction of the concrete foundation 8 and are the center of the concrete foundation 8. It will be in the vertical plane passing through. The three anchor portions 3 are not limited to being attached to and detached from the support member 2, and at least one of them may be detachably provided to the support member 2B.

If the anchor bolt set 1 is provided with such a support member 2B, the same effect as that obtained by the anchor bolt set 1 using the support members 2 and 2A can be obtained at the corner portion of the foundation 8.

In the support member 2B, the horizontal anchor bolt 25 may be provided so as to project in the horizontal direction within the vertical plane. For example, the support member 2B is formed with a side surface portion orthogonal to the vertical surface, and the horizontal anchor bolt 25 is screwed into a screw hole formed in the side surface portion.

Also for the anchor bolt set 1 shown in FIG. 4, the three long nuts 23 are welded so that the surfaces including the center line of the central long nut 23 and the adjacent long nuts 23 are orthogonal to each other. At the same time, three anchor portions 3 may be provided.

FIG. 6 shows the anchor bolt set 1A. The anchor bolt set 1A has a plurality of anchor portions 3A (two in this example), and the plurality of anchor bolt sets 1A are arranged so that the lower end side of the plurality of anchor portions 3A can spread to each other as compared with the upper end side. The plurality of anchor portions 3A are provided so as to be swingable with respect to the support member 2C supporting the anchor portion 3 with the upper end side as a fulcrum. It should be noted that the present invention is not limited to all of the plurality of anchor portions 3A being swingable, and it is sufficient that at least one of the plurality of anchor portions 3A is swingable.

The base plate 201 of the support member 2C is formed with a hole that allows the anchor portion 3A to swing, and the screw portion on the upper end side of the anchor portion 3A projects upward from the base plate 201. Then, the nut 31 is screwed into the protruding screw portion. Further, an inclined portion 31a for diagonally supporting the upper end portion of the swingable anchor portion 3A is formed on the lower surface of the washer portion of the nut 31. The inclined portion may be provided on the upper surface of the base plate 201.

A square box-shaped member 202 having four side surfaces is fixed on the base plate 201 by welding. A bolt (pressing portion) 32 that presses the upper end portion of the swingable anchor portion 3A on the two side surfaces orthogonal to the rocking surface of the anchor portion 3A among the four side surfaces in a direction in which the lower end side thereof expands. Is screwed in.

The top plate portion 203 is fixed to the upper surface of the square box-shaped member 202 by welding. A bolt with a head forming the bolt portion 4 is screwed into the top plate portion 203 with the head facing down.

In the case of the anchor bolt set 1A, at least one of the plurality of anchor portions 3A is provided swingably with respect to the support member 2C supporting the plurality of anchor portions 3A, so that the anchor portion 3A is provided. May interfere with the reinforcing bars already assembled in the formwork, but the anchor portion 3A is swung to narrow the angle of spread and set on the formwork while avoiding interference with the reinforcing bars. After that, the anchor portion can be swung to make adjustments to widen the angle of spread.

Further, if a pressing portion (bolt 32) that presses the upper end portion of the swingable anchor portion 3A in a direction in which the lower end side thereof expands is provided, the swingable anchor portion can be easily operated by operating the pressing portion. The swing angle of the portion 3A can be adjusted.

Further, when the inclined portion 31a for obliquely supporting the upper end portion of the swingable anchor portion 3A is provided, the swingable anchor portion 3A is easily expanded to a predetermined angle by the inclined portion. be able to.

As for the anchor bolt set 1A, the shape of the support member 2C in a plan view is substantially L-shaped, and one of the three anchor portions is fixed in a vertical arrangement, and both sides of the fixed anchor portion are used. The swingable anchor portions 3A may be arranged respectively. Such an anchor bolt set 1A can also be suitably provided at a corner portion of the concrete foundation 8.

Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to that of the illustrated embodiment. It is possible to make various modifications and modifications to the illustrated embodiment within the same range as the present invention or within the same range.

1: Anchor bolt set 1A: Anchor bolt set 2: Support member 2A: Support member 2B: Support member 2C: Support member 3: Anchor part 3A: Anchor part 4: Bolt part 4A: Bolt part 8: Concrete foundation 9: Concrete foundation 21: Bolt tap hole 22: Anchor tap hole 23: Long nut 25: Horizontal anchor bolt 31: Nut 31a: Inclined portion 81: Upper main bar 82: Lower main bar 83: Vertical bar 91: Anchor bolt 201: Base plate 202: Square box-shaped member 203: Top plate

Claims (2)

It is embedded in the foundation and has bolt portions on the upper side of the support member that protrude from the upper surface of the foundation and support and fix the column bases and the like, and has a plurality of anchor portions on the lower side of the support member. Anchor bolt set in which the lower end side of the anchor part spreads mutually compared to the upper end side.
With respect to the support member, at least one of the plurality of anchor portions is detachably provided by a screw portion formed in the anchor portion and a screw hole formed in the support member. The screw holes are formed diagonally so that the lower end side of the plurality of anchor portions expands to each other as compared with the upper end side.
The support member has a substantially L-shape in a plan view, and the support member has three anchor portions and a polygonal line connecting the upper ends of the three anchor portions is an L-shape in the plan view. Anchor bolt set characterized by being provided so as to overlap with . The anchor bolt set according to claim 1, wherein the bolt portion protruding from the upper surface of the foundation is detachably provided with respect to the support member.

Images