JP2004019313A - Support for anchor bolt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a support applicable in a wide range with capability of positively holding an anchor bolt embedded in a continuous footing and shift-arranging the anchor bolt. <P>SOLUTION: The anchor bolt 4 arranged in a bolt through hole 12 of the support 1 is pressed and held to a holding part wall by a conical face of a setscrew 8 with the tip formed as the conical face. The bolt through hole 12 is provided with two first and second bolt through parts 16a, 16b, and the first through part 16a may be arranged on the center line P of the continuous footing. The anchor bolt 4 is fixed into the second through part 16b, and the position can be laterally shifted from the center line in the width direction of the continuous footing. The position of the anchor bolt 4 can be shifted into a reverse position by reversing to use the support 6. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor bolt positioning support for positioning an anchor bolt (including a column fastening anchor bolt) buried in a concrete fabric foundation on a fabric foundation form before placing concrete.
[0002]
[Prior art]
Anchor bolts embedded in a cloth foundation include a base fixing anchor bolt for fixing a base and a column fastening anchor bolt for anchoring a hole-down hardware fixed to a column.
Since all of these anchor bolts pass through holes provided in the base, they must be accurately positioned and embedded in the fabric foundation.
Further, in the anchor bolt for column fastening buried near the pillar, the position from the pillar core differs depending on the pillar thickness dimension (for example, 120 × 120 square, 105 × 105 square), and the base of the side of the pillar is reinforced. Depending on whether or not the anchor is installed, there are cases where the anchor bolt is embedded on the core (widthwise center line) of the cloth foundation and where the anchor bolt is embedded at a position shifted from the core.
As described above, when constructing the fabric foundation, the positioning of the anchor bolts is various, and the number of anchor bolts is large.
[0003]
However, in the conventional support device, the structure for holding the anchor bolt is such that the anchor bolt is inserted from below into a cylinder provided on the support device, and a nut is screwed into an upper end portion, and the nut is engaged with the cylinder. When concrete is poured into the formwork, the anchor bolts may move upward and out of the cylindrical body due to the force, and the lower part of the anchor bolts is tied to the reinforcing steel. Or using tools. In addition, in the case of the anchor bolt for column fastening, if the base of the brace is present at the place where the anchor bolt penetrates on the base, it is necessary to shift the position of the anchor bolt in correspondence with this, but the processing is troublesome.
[0004]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a support which can easily and surely position an anchor bolt (for fixing a base or fastening a column) embedded in a cloth foundation with respect to a cloth foundation formwork.
[0005]
[Means for Solving the Problems]
It has a support part that is hung on the top end of the formwork and a bolt holding part that holds the anchor bolt. The formwork is a fabric formwork for fabric foundation that is installed facing the formwork.
The support portion is located at both ends of the bolt holding portion and has a lateral surface portion that engages with the top end of the formwork. The support portion may be integrated with the bolt holding portion or may be a separate member. In the case of a separate member, the support portion has a second lateral surface portion in addition to the lateral surface portion (first lateral surface portion), and the lateral surface portion includes a bolt. Combined with the holding part. And by making the connection with the bolt holding portion adjustable, the interval between the support portions connected to both ends of the bolt holding portion can be selected according to the width dimension of the cloth foundation.
[0006]
The supporting portion as a separate member has a structure including a first lateral surface portion, a second lateral surface portion, and a vertical surface portion connecting the first lateral surface portion and the second lateral surface portion in a crank shape, and is coupled to the bolt holding portion at the second lateral surface portion. Is a portion to be engaged with the top end of the formwork. Thus, in this support, the bolt holding portion can be used by being suspended between the molds on both sides by a length substantially equal to the length of the vertical surface portion from the top end surface of the mold. For this reason, the position of the push screw of the bolt holding part is low, so even if the anchor bolt is designed so that the amount of protrusion of the embedded anchor bolt from the top end face is small, the push screw must be Abuts on a portion projecting from the anchor bolt, and can stably support the anchor bolt. That is, the range of application as an anchor bolt support is wide.
[0007]
The bolt holding portion includes a bolt insertion hole and a set screw orthogonal to the bolt insertion hole. The bolt insertion hole is provided substantially vertically at the center of the holding portion in the vertical direction. Further, the push screw has a conical surface on the side surface of the distal end portion, and presses and fixes the anchor bolt against the support portion wall with the conical surface.
According to this structure, since the anchor bolt is pressed against the holding portion wall by the conical surface of the tip end portion of the push screw, the anchor bolt is firmly held on the support by the wedge effect of the conical surface. For this reason, the anchor bolts do not move up and down or come off due to vibration even during concrete casting.
[0008]
Although the bolt insertion hole is circular, not only one but also two insertion portions may be provided at positions on both sides of the tip end of the set screw. That is, the conical surface of the tip of the push screw is arranged so that the anchor bolt can be firmly pressed by the conical surface regardless of whether the anchor bolt is on the left or right side or on both sides. At this time, if one of the first bolt insertion portions is disposed at the center in the longitudinal direction of the holding portion, the other second bolt insertion portion shifts from the center. Then, when the support is arranged such that the first bolt insertion portion is on the core as the cloth base, the second bolt insertion portion is at a position shifted from the core in the width direction of the cloth base, and the struts are not formed. When necessary, such as when the anchor bolts are present, the anchor bolts can be easily arranged at positions where they do not interfere with them.
[0009]
The bolt holding portion may have a structure that can be used by turning left and right. That is, when the support portion and the bolt holding portion are integral, the bolt holding portion can be inverted by inverting the entire support, and when the support portion and the bolt holding portion are separate members, only the bolt holding portion can be inverted. Structure.
In this configuration, it is possible to cope with both the case where the arrangement of the anchor bolt is shifted from the center to the left and the case where the arrangement is shifted to the right, so that it is convenient to position the anchor bolt for column fastening.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an anchor bolt support 1 according to a first embodiment, which is set on a fabric foundation form 3 already installed on a footing 2. Reference numeral 4 denotes an anchor bolt for burying a base portion in cloth foundation concrete. Reference numeral 5 denotes a ruler used for positioning the support 1 itself. Core lines d1 and d2 are provided orthogonally on the upper surface, and are used in accordance with the core P (usually shown with a water thread stretched over a mold) as the cloth base.
[0011]
The support 1 (FIGS. 2 and 3) includes a bolt holding section 6, a support section 7, and a set screw 8.
The holding portion 6 is basically formed by bending a steel plate into a U-shape to form an upper plate 9, a lower plate 10, and a back plate 11, and a bolt insertion hole 12 is provided through the upper plate 9 and the lower plate 10 at the same position. It is. A female screw is formed in the center of the back plate 11, and a push screw 8 having a conical surface at the tip is screwed into the female screw. The push screw 8 (FIG. 4) is disposed at a position where the axis in the front-rear direction is slightly deviated in the left-right direction with respect to the center of a bolt insertion portion 16 described later. This is because when the push screw 8 is screwed in, it comes into contact with the anchor bolt 4 at the conical surface at the tip.
[0012]
In this embodiment, the support portion 7 includes a horizontal surface portion 13 and a vertical surface portion 14 at both ends (left and right ends) of the upper plate 9, and is formed integrally with the holding portion 6. The horizontal surface portion 13 and the vertical surface portion 14 are formed only on the upper plate 9, and the horizontal surface portion 13 is arranged at a substantially middle portion of the holding portion 6 in the vertical dimension.
The bolt insertion hole 12 includes an introduction path 15 cut out in a direction crossing from the front to the rear, and a bolt insertion portion 16 located at the rear end portion at the center of the bolt holding portion 6 (the center of the support portions 7 on both sides).
Since the anchor bolt usually uses M16, the width of the introduction path 15 and the diameter of the bolt insertion portion 16 are adjusted to be slightly larger.
[0013]
The anchor bolt 4 is attached to the support 1 by inserting the upper part of the anchor bolt 4 into the bolt insertion part 16 of the bolt holding part 6 and fixing it with the push screw 8. When the push screw 8 is screwed in, the conical surface at the tip presses the anchor bolt 4 against the holding portion wall of the bolt holding portion 6, and the anchor bolt 4 can be fixed to the support 1. The anchor bolt 4 and the support 1 are fixed more firmly than when the anchor bolt 4 is pressed on the distal end face of the push screw 4 from a direction perpendicular to the axis of the bolt.
[0014]
Next, the support 1 is placed on the top end of the formwork 3 as shown in FIG. 1 to stabilize it by placing the lateral surfaces 13, 13 on both sides thereof. Are fixed by nailing or a clamp 17. In order to position the support 1 itself, the anchor bolt 4 may be directly made to coincide with the passing core P.
Next, concrete is poured. Since the anchor 1 is firmly fixed to the support 1 and the support 1 itself is also firmly fixed to the formwork 3, the position of the anchor 4 may be deviated by the force of concrete casting. Absent.
[0015]
FIG. 5 shows a second embodiment, which differs from the first embodiment in the configuration of the bolt insertion holes 12. That is, the bolt insertion hole 12 has the first bolt insertion portion 16 a and the second bolt insertion portion 16 b on both sides of the introduction path 15, and is arranged symmetrically with respect to the introduction path 15. In this case, since the first bolt insertion portion 16a is disposed at the center of the bolt holding portion 6 (the center of the left and right support portions 7, 7), the second bolt insertion portion 16b is shifted from the core P of the fabric base. (For example, 28 mm). When it is necessary to shift the position of the anchor bolt 4 to the left or right in the width direction of the cloth foundation due to the presence of bracing or the like, it is possible to easily respond by selecting the second bolt insertion portion 16b. Further, when the bolt holding portion 6 is turned right and left, the position of the first bolt insertion portion 16a does not change, but the position of the second bolt insertion portion 16b becomes a symmetrical position on the opposite side, and the anchor bolt 4 is fixed thereto. Then, it can be shifted in the opposite direction to the above.
The axial center of the push screw 8 is set at an intermediate portion between the first and second bolt insertion portions 16a and 16b, and when the screw is screwed in, the conical surface at the tip of the screw bolt 8 of the anchor bolt 4 attached to the bolt insertion portions 16a and 16b. It is arranged to abut against and press any of them.
[0016]
FIGS. 6 to 8 show a third embodiment, which differs from the first embodiment in the configuration of the bolt holding portion 6 and the support portion 7. In this embodiment, the holding portion 6 and the support portion 7 are separate members, and the distance between the left and right support portions 7 can be selected. Further, the support portion 7 includes a first lateral surface portion 18, a second lateral surface portion 19, and a vertical surface portion 20 in which these are connected in a crank shape. Then, the support portions 7, 7 are arranged at both ends of the bolt holding portion so as to face each other (symmetrically) with the bolt holding portion 6 as a center, and each second horizontal surface portion 19 is attached to the upper plate 9 of the bolt holding portion 6. It is fixed by screws 21. The fixing position by the screw 21 can be selected according to the width dimension of the cloth foundation by providing three stages of holes in the upper plate 9 of the bolt holding portion 6.
[0017]
As in the first embodiment, an anchor bolt 4 is fixed to a support 1 with a set screw 8, and the anchor bolt 4 is arranged on a mold 3. In this case, the vertical surface portion 20 of the support portion 7 is longer than in the first and second embodiments, and the first horizontal surface portion 18 is to be engaged with the top end of the mold 3. In the embodiment, the bolt holding portion 6 is used in a state of being suspended below the top end surface of the mold 3.
For this reason, the vertical position of the push screw 8 is low, and the anchor bolt 4 can be sufficiently fixed to the support 1 even when the upper part of the anchor bolt 4 protrudes from the top end surface of the cloth foundation is small.
[0018]
Although not shown, as a fourth embodiment, similarly to the upper plate 9, a hole for screwing a screw 21 is provided in the lower plate 10 of the bolt holding portion 6 in the third embodiment. May be provided symmetrically around the introduction path 15 as in the second embodiment. According to this configuration, even in the case of the suspension type as in the third embodiment, the anchor bolt can be arranged at the shift position using the same support 1.
[0019]
【The invention's effect】
Since the support has a structure in which the anchor bolt is pressed by the tip conical surface of the push screw, the anchor bolt is securely fixed to the support. Further, since the pressing portion by the pressing screw is a conical surface, the pressing can be performed by the same pressing screw regardless of whether the anchor bolt is disposed on the left or right side of the pressing screw.
The bolt holding part has two bolt insertion parts, one of which is located at the center of the fabric base and the other is shifted, the arrangement of the anchor bolts can be easily shifted simply by selecting the insertion part. it can. In addition, if the bolt holding portion is turned left and right, it can be easily shifted to a symmetrical position opposite to the above shift position.
By forming the bolt holding portion and the support portion of the support member as separate members, a support device corresponding to the width dimension of the fabric base can be easily obtained.
In addition, since the vertical portion of the support portion is elongated and the support tool is of a hanging type, it can be used without any problem even when an anchor bolt having a small protrusion amount from the cloth foundation top end surface is used, and the range of use is wide.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a use state (first embodiment).
FIG. 2 is a perspective view. FIG. 3 is an exploded perspective view. FIG. 4 is a plan view. FIG. 5 is a plan view (second embodiment).
FIG. 6 is a side view (third embodiment).
FIG. 7 is a plan view. FIG. 8 is a front view.
DESCRIPTION OF SYMBOLS 1 Anchor bolt support 2 Footing 3 Form 4 Anchor bolt 5 Ruler 6 Bolt holding part 7 Support part 8 Push screw 9 Upper plate 10 Lower plate 11 Back plate 12 Bolt insertion hole 13 Side surface part 14 Vertical surface part 15 Introductory path 16, 16a, 16b Bolt insertion portion 17 Clamp 18 First lateral surface portion 19 Second lateral surface portion 20 Vertical surface portion 21 Screw P: core lines d1, d2: core line

Claims (5)

An anchor bolt supporter for positioning an anchor bolt to be embedded in a cloth foundation before casting concrete, wherein the bolt holding part holds the anchor bolt on a support part which is hung on a top end of a fabric foundation form frame installed oppositely. The bolt holding portion has a vertical bolt insertion hole provided substantially at the center of the holding portion in the width direction of the fabric base and a push screw orthogonal to the bolt insertion hole, and the side of the tip of the push screw is provided on the side surface. An anchor bolt support tool, wherein an anchor bolt is pressed against a holding portion wall by a provided conical surface and fixed. The bolt insertion hole has a bolt insertion portion on each side of the push screw and at a position where the anchor bolt is in contact with the conical surface at the tip of the push screw, and one of the bolt insertion portions is located at the center in the cloth base width direction of the holding portion. 2. The anchor bolt support according to claim 1, wherein the other bolt insertion portion is located at a position shifted from the center in the width direction of the cloth foundation. 3. It has two support portions and a bolt holding portion, and the support portion is composed of a first lateral surface portion, a second lateral surface portion, and a vertical surface portion connecting them in a crank shape, and the support portions are opposed to both ends of the bolt retaining portion. 3. The bolt according to claim 1, wherein the bolts are arranged so as to be connected to the bolt holding portions at the second lateral surface portion, and the first lateral surface portion is engaged with the top end of the formwork. 4. Support. The bolt support according to claim 3, wherein the connection between the second lateral surface portion of the support portion and the bolt holding portion is such that the distance between the support portions connected to both sides can be adjusted in the longitudinal direction of the bolt holding portion. Utensils. The supporter for an anchor bolt according to any one of claims 1 to 4, wherein the holding portion is capable of being used left-right inverted.

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