JP2020165097A - Anchor bolt construction jig and foundation formwork structure - Google Patents

Abstract

To provide an anchor bolt construction jig which can improve the position accuracy of anchor bolts buried and fixed in concrete foundations and reduce construction time.SOLUTION: A construction jig 10 of anchor bolts 2 includes: a pair of receiving tools 11 provided with an inner wall mounting part 12 mounted on inner wall surfaces 53 of a pair of side wall parts 5A, 5B facing each other in a formwork 5 and a receiving part 13 projecting inward of the formwork 5 with the inner wall mounting parts 12 mounted on the inner wall surfaces 53; and an anchor plate 15 that holds the anchor bolts 2 in a suspended state and is supported and fixed to each receiving part 13 of the receiving tools 11. A fixture 20 is inserted and fixed through a first through hole 13a formed in the receiving part 13 of the receiving tools 11 and a second through hole 16 formed in the anchor plate 15.SELECTED DRAWING: Figure 3

Description

The present invention relates to an anchor bolt construction jig for connecting a skeleton and a foundation in a foundation structure of a house or the like, and a foundation form structure provided with the anchor bolt construction jig.

Conventionally, as a construction jig for this type of anchor bolt, for example, Patent Document 1 includes the construction jig shown below. This construction jig has an anchor plate that holds the anchor bolts in a suspended state, an adjustment screw for height adjustment attached to the anchor plate, and an anchor bolt on a pair of side walls facing each other in the formwork. It is equipped with a screw bolt (fixing tool) that is fixed to the end face.

When installing the anchor plate, adjust the levelness of the anchor plate with the adjusting screw with the tip of the adjusting screw in contact with the upper end surface of the side wall of the formwork, and adjust the anchor plate after adjustment. Is fixed to the side wall after fixing.

Japanese Unexamined Patent Publication No. 2008-255724

However, in the construction jig described in Patent Document 1, the upper end surface of the side wall portion of the formwork is used as a reference for the position of the anchor plate. For this reason, even if adjustment screws are provided, anchor bolts should be attached accurately in a short time to the upper end surface that changes due to the condition of the ground supporting the formwork or the condition of the formwork itself. Was sometimes difficult.

The present invention has been made in view of these points, and is an anchor bolt construction jig capable of improving the position accuracy of anchor bolts buried and fixed in a concrete foundation and shortening the construction time, and an anchor bolt construction jig. The purpose is to provide a foundation form structure equipped with a construction jig.

In order to solve the above problems, the anchor bolt construction jig according to the present invention is provided so that the upper end of the anchor bolt protrudes upward from the upper surface of the concrete foundation formed by placing concrete in the mold. An anchor bolt construction jig for burying and fixing the anchor bolt in the concrete foundation, wherein the inner wall mounting portion attached to the inner wall surface of the pair of side wall portions facing the mold and the inner wall mounting portion are described above. A pair of receivers equipped with a receiver that protrudes inward of the mold while being attached to the inner wall surface, and the anchor bolts are held in a suspended state, and each receiver of the receiver is held. It is characterized in that it is provided with an anchor plate that is supported and fixed by a fixture.

According to the anchor bolt construction jig of the present invention, first, a horizontal level line as a reference is drawn on the inner wall surface of the pair of side wall portions facing each other of the formwork. The inner wall mounting portion of the receiving tool can be applied to the inner wall surface of the pair of side wall portions facing along the level line, and the receiving tool can be easily attached to the side wall portion with a screw or the like. In this state, the receiving portion of the receiving tool protrudes inward of the formwork.

At this time, with the anchor plate received by the receiving portion, the levelness of the receiving portion of each receiving tool is adjusted so that the anchor plate is horizontal. Next, the anchor plate is placed on the receiving portion of the pair of receiving tools, and the anchor plate is supported and fixed to each receiving portion of the receiving device.

In this way, if the receiver is attached to the inner wall surface of the side wall with high accuracy with respect to the level line marked on the inner wall surface, the anchor plate can be attached to the formwork accurately in a short time via a pair of receivers. Can be done.

Further, in the present invention, the anchor plate is not directly attached to the inner wall surface of the side wall portion, but is attached to a pair of receivers whose height and levelness are adjusted. Therefore, it is not necessary to directly adjust the height and levelness of the anchor plate when the anchor plate is attached, and the anchor plate with high accuracy can be easily provided to the formwork.

After fixing the anchor plate, the anchor bolts are hung and held on the anchor plate. After that, ready-mixed concrete is poured into the formwork and placed between the inner walls of the pair of side wall portions to a predetermined height. Anchor bolts supported by the anchor plate are buried and fixed with the upper end protruding from the upper surface of the cast concrete foundation.

In the above aspect, the shape of the anchor plate is not particularly limited as long as it can be supported and fixed to each receiving portion of the receiving tool. However, in a more preferable embodiment, a first through hole through which the fixture is inserted is formed in the receiving portion of each of the receivers, and the anchor plate is supported by the receiver in the anchor plate. In this state, a second through hole through which the fixture is inserted is formed together with the first through hole, and the anchor plate and the receiver are fixed via the fixture. One of the first and second through holes is an elongated hole for alignment with the other through hole extending in the formwork width direction in which the pair of side wall portions face each other. ..

According to this aspect, the fixture is inserted into the first through hole formed in the receiving portion of each receiver, the fixture is inserted into the second through hole formed in the anchor plate, and the anchor plate is inserted into each receiver. To fix. At this time, since one of the first and second through holes is a long hole for alignment extending in the width direction of the formwork, even if the distance between the pair of side walls of the formwork changes, The anchor plate can be moved relative to the pair of receivers to align one through hole with the other through hole so that the fixture can be inserted.

Further, as a more preferable embodiment, a first through hole through which the fixture is inserted is formed in the receiving portion of each of the receivers, and the anchor plate is supported by the receiver in the anchor plate. In this state, a second through hole through which the fixture is inserted is formed together with the first through hole, and the anchor plate and the receiver are fixed via the fixture. The through hole of one of the first and second through holes extends in the longitudinal direction of the formwork, which is a direction orthogonal to the direction in which the pair of side wall portions face each other, and the through hole extends along the longitudinal direction of the formwork. An elongated hole for adjustment that adjusts the position of the anchor plate.

According to this aspect, the fixture is inserted into the first through hole formed in the receiving portion of each receiver, the fixture is inserted into the second through hole formed in the anchor plate, and the anchor plate is inserted into each receiver. To fix. Since one of the first and second through holes is an elongated hole for adjusting the position of the anchor plate extending in the longitudinal direction of the formwork, the long adjusting hole is used as a receiver for the anchor plate. On the other hand, it can be moved in the longitudinal direction of the formwork, and can be aligned with the reference position with high accuracy.

In a more preferred embodiment, at least one of the edges of the anchor plate, the edge of the side wall facing the inner wall surface, has a recess for allowing a waist wall muscle that rises upward along the inner wall surface to escape. Is formed.

According to this aspect, when the anchor plate is attached to the formwork, the concave portion formed at the edge of the anchor plate allows the lumbar wall muscles that rise upward along the inner wall surface to escape. Therefore, the position of the anchor bolt is not restricted by the lumbar wall muscle.

In a more preferred embodiment, the anchor plate includes a reference line for confirming that the anchor plate is arranged at a predetermined reference position, and a reference hole provided so as to penetrate the reference line.

According to this aspect, the anchor plate can be fixed at a predetermined position by aligning the reference thread such as water thread stretched on the outside of the mold with the reference line of the anchor plate, and on the reference line. A nail, a pin, or the like can be inserted into the reference hole provided through the reference thread, and the matching with the reference position of the reference thread can be easily confirmed.

In a more preferred embodiment, the anchor plate is formed with an insertion hole through which the anchor bolt is inserted so as to suspend the anchor bolt from the anchor plate, and the construction jig can be attached to and detached from the anchor plate. The attachment is formed with a small-diameter insertion hole smaller than the insertion hole, and the anchor plate and the attachment are placed at a position where the insertion hole of the anchor plate is formed. It is removable from each other so that small diameter insertion holes are arranged.

According to this aspect, anchor bolts having a predetermined outer diameter can be fixed to the insertion holes of one anchor plate. On the other hand, when fixing an anchor bolt having a diameter smaller than this, an attachment is attached to the anchor plate. As a result, the small-diameter insertion hole is arranged at the position where the insertion hole of the anchor plate is formed, so that the small-diameter anchor bolt can be attached to the anchor plate with high accuracy.

The foundation formwork structure according to the present invention is a foundation formwork structure provided with the anchor bolt construction jig, and the formwork having the pair of side wall portions and the pair of the formwork. A pair of receivers fixed horizontally to the side wall of the structure, an anchor plate fixed horizontally to the pair of receivers, and an anchor bolt suspended from the anchor plate. Be prepared.

According to the basic formwork structure configured in this way, a horizontal level line as a reference is drawn on a pair of side wall portions of the formwork, and a pair of receivers are horizontally placed on the pair of side wall portions in accordance with the level line. Fix to state. After that, the anchor plate is fixed to a pair of fixed receivers, and the anchor bolt is held by the anchor plate. As described above, since the pair of receivers can be easily fixed and the anchor plate can be easily fixed to the pair of receivers, the working time can be significantly shortened and the position accuracy of the anchor bolts can be improved. Further, when the ready-mixed concrete is injected into the formwork, the anchor bolts are fixed in a stable state, so that the movement of the anchor bolts can be suppressed.

According to the present invention, the positional accuracy of anchor bolts buried and fixed in a concrete foundation can be improved, and the construction time can be shortened.

It is sectional drawing of the main part of the concrete foundation using the construction jig of the anchor bolt which concerns on this invention. It is sectional drawing of the main part of the foundation formwork structure provided with one embodiment of the construction jig of the anchor bolt for forming the concrete foundation shown in FIG. It is a main part plan view which shows the construction jig of the anchor bolt used in the straight part (general part) of the foundation formwork structure shown in FIG. It is sectional drawing of the main part along the line AA of FIG. It is a top view of the anchor plate shown in FIG. The receiver of the anchor plate shown in FIG. 3 is shown, (a) is a plan view, (b) is an elevation view, (c) is a bottom view, and (d) is a sectional view taken along line BB of (b). .. It is a process drawing which shows the construction method of the construction jig of the anchor bolt shown in FIG. It is a figure which showed the modification of the construction jig of the anchor bolt shown in FIG. An anchor bolt construction jig according to a second embodiment of the present invention, (a) is a plan view of an anchor plate with an anchor bolt attachment attached, and (b) is a line CC of (a). It is a sectional view. (A) is a plan view of the attachment shown in FIG. 9, (b) is a sectional view taken along line DD of (a), (c) is a sectional view of a modified example of the attachment, and (d) is an attachment shown in (c). It is sectional drawing of the state which attached to the anchor plate of the modification of. It is a main part plan view of the construction jig of the anchor bolt which concerns on 3rd Embodiment of this invention. The receiver of the anchor bolt construction jig shown in FIG. 11 is shown, (a) is a plan view, (b) is an elevation view, (c) is a side view, and (d) is a bottom view. It is sectional drawing of the main part along the line EE of FIG. FIG. 11 is a perspective view of a main part showing an anchor plate of an anchor bolt construction jig shown in FIG. 11 and one receiver. It is sectional drawing of the main part along the line FF of FIG.

Hereinafter, some embodiments of the anchor bolt construction jig and the foundation formwork structure provided with the construction jig according to the present invention will be described in detail with reference to the drawings.

First, the concrete foundation 1 formed by using the anchor bolt construction jig according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view of a main part of a concrete foundation using an anchor bolt construction jig according to the present embodiment, and FIG. 2 is a construction cure of the anchor bolt according to the present embodiment for forming the concrete foundation shown in FIG. It is a cross-sectional view of the main part of the foundation formwork structure provided with the tool.

1. 1. About the concrete foundation 1 As shown in FIGS. 1 and 2, the concrete foundation 1 has a wide and small base portion 1a and a narrow and high rising portion 1b formed on the base portion 1a. And have. Anchor bolts 2 are buried and fixed in the concrete foundation 1. The upper end portion of the anchor bolt 2 projects upward from the upper end surface of the rising portion 1b.

The base portion 1a of the concrete foundation 1 is formed on the base layer 3. Specifically, as shown in FIG. 2, the base layer 3 is waste concrete and serves as a cradle for the formwork 4. When molding the base portion 1a, first, the mold 4 is installed and fixed on the base layer 3. Next, the reinforcing bars (not shown) for the base portion 1a are horizontally arranged in the formwork 4, and the reinforcing bars such as the lumbar wall reinforcing bars for the rising portion 1b are arranged in the vertical direction. Next, ready-mixed concrete is placed in the formwork 4. As a result, the base portion 1a is formed on the base layer 3.

After molding the base portion 1a, the rising portion 1b is further molded by the foundation formwork structure 30 described later. In the present embodiment, in the foundation formwork structure 30, the formwork 5 supported by the supporters 7 and 7 is arranged on the base portion 1a, and the anchor bolts 2 are placed in the formwork 5 by using the construction jig 10. It is constructed by arranging it. Ready-mixed concrete is injected and cast into the formwork 5 of the constructed foundation formwork structure 30 to form a rising portion 1b. In the present embodiment, the basic formwork structure 30 and the construction jig 10 including the anchor plate 15 used for the basic formwork structure 30 will be described in detail below.

2. About the foundation formwork structure 30 In the present embodiment, the foundation formwork structure 30 includes a formwork 5 in which concrete is cast, a construction jig 10 for anchor bolts 2, and an anchor bolt 2. The construction jig 10 includes at least a pair of receivers 11 and 11 fixed horizontally to the pair of side wall portions of the formwork 5 and an anchor plate 15 fixed horizontally to the pair of receivers 11 and 11. I have. The anchor bolt 2 is a bolt for connecting and fixing the building frame to the upper part of the concrete foundation 1, and is held by the anchor plate 15 in a state of being suspended from the anchor plate 15.

As described above, the formwork 5 is a formwork that is installed on the base portion 1a that serves as a pedestal and forms the rising portion 1b of the concrete foundation 1. The formwork 5 includes side wall portions 5A and 5B erected vertically on the upper surface of the base portion 1a.

The side wall portions 5A and 5B are arranged to face each other so as to rise from the base portion 1a along the vertical direction. The facing inner wall surfaces of the side wall portions 5A and 5B are formed at a predetermined interval (distance) W. The side wall portions 5A and 5B form a flow path for injecting ready-mixed concrete for the rising portion 1b in the formwork 5. The formwork 5 has a shape extending in the flow path direction, and the formwork longitudinal direction of the formwork 5 is the X direction. The formwork width direction, which is the direction in which the pair of side wall portions 5A and 5B face each other, is the Y direction. Therefore, the formwork longitudinal direction (X direction) is orthogonal to the formwork width direction (Y direction) and the vertical direction (Z direction).

The side wall portions 5A and 5B of the formwork 5 are made of wood or steel, for example. When the formwork 5 is made of wood, as shown in FIG. 2, each side wall portion 5A and 5B has a plywood 5c having a thickness of about 9 to 15 mm and a square member 5d fixed to the plywood 5c to reinforce the plywood 5c. It is formed by. In order to keep the distance (distance) between the pair of facing side wall portions 5A and 5B constant in the mold 5, separators (spacers) and the like (not shown) are provided at regular intervals between the inner wall surfaces of the side wall portions 5A and 5B. It may be arranged in.

In the present embodiment, steel end thick angles 6 are fixed to the outer wall surfaces of the side wall portions 5A and 5B along the horizontal direction. Each supporter 7 described later supports each side wall portion 5A and 5B via the end thick angle 6. The thick end angle 6 is a formwork reinforcing material fixed to the outer wall surface of the side wall portions 5A and 5B along the flow path through which the ready-mixed concrete in the formwork 5 flows, and also functions as a receiving material for receiving the supporter 7. I am in charge.

The supporter 7 supports the side wall portions 5A and 5B, and adjusts the horizontal positions of the facing inner wall surfaces of the pair of side wall portions 5A and 5B in the opposite directions. The supporter 7 is installed so as to be stretched between the inclined wall portion 8 of the excavation portion and the end thick angle 6, for example, and its length is maintained so as to keep the positions of the upper end surfaces of the side wall portions 5A and 5B constant. The length can be adjusted.

In the present embodiment, the supporter 7 is formed by screwing a shaft 7a fixed to the wall portion 8 of the ground and a shaft 7b in contact with the thick end angle 6 with a turnbuckle 7c. The entire length of the supporter 7 is adjusted by rotating the turnbuckle 7c, and the positions of the upper end surfaces of the opposing side wall portions 5A and 5B are adjusted. As a result, the position of the anchor plate 15 described later is adjusted, and the anchor bolt 2 attached to the anchor plate 15 can be arranged at an appropriate position.

3. 3. About the construction jig 10 according to the first embodiment In the present embodiment, the anchor bolt construction jig 10 is fixed by burying the anchor bolt 2 in the concrete foundation 1 formed by placing ready-mixed concrete in the mold 5. It is a jig for doing. The construction jig 10 is fixed with the upper end portion of the anchor bolt 2 protruding upward (more preferably in the vertical direction) from the upper surface of the concrete foundation 1. In the present embodiment, after the concrete foundation 1 is placed, the construction jig 10 is not buried in the concrete foundation 1, so it is removed from the concrete foundation 1.

The construction jig 10 includes a pair of receivers 11 and 11 attached to a pair of side wall portions 5A and 5B of the formwork 5, and an anchor plate 15 which is horizontally supported and fixed to the pair of receivers 11 and 11. At least have. The construction jig 10 is composed of a pair of receivers 11 and 11 and an anchor plate 15 as described above, but may further include a pair of width stoppers 50 and 50 described later.

First, the receiver 11 will be described with reference to FIGS. 3 to 6. The receiver 11 is a member formed by machining a metal plate material such as a steel plate by press molding or the like, and for example, a member having a thickness of about 3 to 5 mm is used. The receiver 11 is basically formed of an L-shaped angle member (see FIG. 6D). Specifically, the receiver 11 is in a state in which the inner wall mounting portion 12 attached to the inner wall surfaces 53 and 53 of the pair of side wall portions 5A and 5B facing each other of the formwork and the inner wall mounting portion 12 are attached to the inner wall surface 53. A pair of receiving portions 13 projecting inward of the mold 5 are provided.

Specifically, in the cross section of the receiver 11 orthogonal to the longitudinal direction of the formwork, the inner wall mounting portion 12 is formed of a plate material extending in the vertical direction, and the receiving portion 13 extends horizontally from the inner wall mounting portion 12. It is made of plate material. In the present embodiment, the two receiving portions 13 are formed according to the shape of the anchor plate 15 described later. As long as the anchor plate 15 can be stably received, the number of receiving portions 13 formed on one receiving device 11 is not particularly limited.

As shown in FIGS. 3 and 6A, the receiving portion 13 is formed with a first through hole 13a through which a fixture 20 such as a bolt nut is inserted in order to fix the anchor plate 15. The first through hole 13a extends in the longitudinal direction of the formwork, which is the direction (Y direction) orthogonal to the opposite direction (X direction) of the pair of side wall portions 5A and 5B, and is an anchor plate along the longitudinal direction of the formwork. It is an elongated hole for adjustment to adjust the position of 15.

Through holes 14 through which fasteners 21 such as screws and wood screws are inserted are formed in the vicinity of both ends of the inner wall mounting portion 12 of the receiving portion 13 in order to fix the receiving portion 11 to the side wall portions 5A and 5B of the formwork 5. Has been done. The through hole 14 in the vicinity of each end is composed of one through hole located at the center and four through holes located up, down, left and right around the through hole 14. In this way, even if the formwork 5 for fixing the receiver 11 is repeatedly used by providing a plurality of through holes in the vicinity of each end portion, the holes of the stopper 21 that have been made in the side wall portions 5A and 5B so far. Alternatively, the stopper 11 can be fixed to the side wall portions 5A and 5B at a new location while avoiding the dents of the inner wall surfaces 53 and 53 due to the separator (not shown).

A V-shaped notch 12a is formed on the upper end surface of the inner wall mounting portion 12. The notch 12a is formed at the center of the receiver 11 in the longitudinal direction (X direction shown in FIG. 4) at the center position of the first through holes 13a and 13a. The notch 12a is a mark for confirming that the receiver 11 is fixed at the reference position. By aligning the notch 12a with the mark marked on the inner wall surfaces 53 and 53 of the side wall portions 5A and 5B or the reference thread (water thread) stretched so as to be the reference position, the notch 12a is aligned with the longitudinal direction of the formwork. The receiver 11 can be fixed in an accurate position.

Next, the anchor plate 15 will be described. The anchor plate 15 is a member formed by machining a metal plate material such as a steel plate by press molding or the like. For example, a member having a thickness of about 3 to 5 mm is used and is formed into a flat plate shape. The anchor plate 15 is a member that holds the anchor bolt 2 in a suspended state before placing ready-mixed concrete in the formwork 5.

In the present embodiment, the anchor plate 15 is attached and fixed to the formwork 5 forming a straight portion (general portion that is straight in a plan view) of the concrete foundation 1 via a pair of receivers 11 and 11. As shown in FIG. 5, the anchor plate 15 is formed with four insertion holes 2a for holding the four anchor bolts 2 in a suspended state in the mold 5. Each anchor bolt 2 is fixed with a double nut 2c so as to sandwich the anchor plate 15. Both ends of the anchor plate 15 are supported by a pair of receivers 11 and 11 fixed to a pair of side wall portions 5A and 5B facing each other, and are fixed by four fixtures 20.

The anchor plate 15 has a plate shape, and has a pair of first plate portions 15a and 15b extending in the formwork width direction (Y direction) and a first plate portion extending in the formwork longitudinal direction (X direction). It includes three second plate portions 15c, 15d, and 15e that connect the 15a and 15b. Insertion holes 2a in which anchor bolts 2 are arranged are formed in the first plate portions 15a and 15b. The two second plate portions 15c and 15d are connected to the portions of the first plate portions 15a and 15b in which the insertion holes 2a are formed.

The second plate portion 15e is connected to one end portion of the first plate portions 15a and 15b, and the second plate portion does not exist at the other end portion. Therefore, a recess 15f is formed on the peripheral edge of the anchor plate 15 on the other end side between the first plate portions 15a and 15b. The recess 15f is a portion for allowing the waist wall muscles 22, 22 ... That rise upward along the inner wall surfaces 53, 53 of the side wall portions 5A and 5B of the formwork 5 to escape to the inside when the anchor plate 15 is arranged. is there.

Further, as shown in FIGS. 3 and 5, second through holes 16, 16 ... Are formed at both ends of the first plate portions 15a and 15b in the Y direction. In the second through holes 16, 16 ..., the fixture 20 is inserted together with the first through holes 13a, 13a ... In a state where the anchor arch plate 15 is supported by the receivers 11, 11. As a result, the anchor plate 15 and the receiver 11 are fixed via the fixture 20. Here, in the present embodiment, each of the second through holes 16 extends in the formwork width direction (Y direction), which is the direction in which the pair of side wall portions 5A and 5B face each other, and is positioned with the first through hole 13a. It is a long hole for fitting. With this elongated hole, the fixture 20 can be inserted into the first through hole 13a and the second through hole regardless of a minute change in the distance W between the side wall portions 5A and 5B.

A reference line 18 is engraved in the anchor plate 15 at the center of the insertion holes 2a and 2a arranged along the Y direction. A reference line 18 is also engraved at the center of the insertion holes 2a and 2a arranged along the X direction. By aligning these reference lines 18 with the reference threads (water threads) stretched from the outside of the mold 5, the four anchor bolts 2 can be accurately arranged at predetermined positions.

Further, in the anchor plate 15, a reference hole 18a is formed on a reference line 18 formed in the X direction. By inserting a nail or the like into the reference hole 18a with the anchor plate 15 arranged, the alignment with the reference thread (water thread) as a reference can be easily performed.

Further, a V-shaped notch 18b is formed at the outer peripheral end portions of the second plate portions 15c and 15e along the reference line 18 formed in the Y direction. The notch 18b and the reference line 18 facilitate the alignment of the anchor plate 15.

4. About the construction method of the anchor bolt 2 The construction method using the construction jig 10 of the anchor bolt 2 of the present embodiment configured as described above will be described with reference to FIGS. 2 and 7. FIG. 7 is a process diagram showing a method of constructing the anchor bolt construction jig 10 shown in FIGS. 1 to 6.

As shown in FIG. 2, when constructing the concrete foundation 1 in the ground, the ground is excavated to a predetermined depth, and the base layer 3 is formed in the excavated portion. Next, in order to form the wide base portion 1a of the foundation on the base layer 3, the formwork 4 is erected and fixed, the reinforcing bars for the base portion 1a are arranged horizontally, and the rising portion is vertically raised. Arrange the reinforcement for 1b (not shown). Ready-mixed concrete is injected into the formwork 4 to form the base portion 1a of the concrete foundation 1.

After the ready-mixed concrete injected into the base portion 1a is solidified, the formwork 5 is erected and fixed on the base portion 1a so as to surround the reinforcing bar arrangement (not shown) for the rising portion 1b. Specifically, a pair of side wall portions 5A and 5B facing each other with a predetermined distance W are erected so that ready-mixed concrete can be injected into the formwork 5. The side wall portions 5A and 5B are supported by the supporter 7.

Then, as shown in FIG. 7A, a reference horizontal level line L is drawn on the inner wall surfaces of the pair of side wall portions 5A and 5B of the formwork 5 facing each other. After that, as shown in FIG. 7B, the inner wall mounting portion 12 of the receiver 11 is applied to the inner wall surface of the pair of side wall portions 5A and 5B facing each other along the level line L, and the screw 21 and the like are attached. It is inserted into one of the through holes 14 and screwed in, and the receiver 11 is attached to the side wall portions 5A and 5B. As a result, the receiving portion 13 of the receiving tool 11 projects horizontally toward the inside of the formwork 5.

When the receivers 11 and 11 are fixed to the side wall portions 5A and 5B, the levelness of the anchor plate 15 is adjusted by the receivers 13 and 13. Specifically, for example, the horizontality can be adjusted by shifting the screwing position of the screw 21 that fixes the inner wall mounting portion 12 of the receiver 11. Further, the horizontality of the anchor plate 15 can be adjusted by inserting a washer or the like in the contact portion between the receiving portions 13 and 13 and the anchor plate 15.

Next, as shown in FIG. 7 (c), the anchor plate 15 is placed on the receiving portions 13 and 13 of the pair of receiving tools 11 and 11. Then, as shown in FIG. 7D, fixing tools 20 such as bolts and nuts are inserted into the first through holes 13a formed in the receivers 11 and 11 and the second through holes 16 formed in the anchor plate 15. The anchor plate 15 is supported and fixed to each receiver 11 by inserting and tightening the fixture 20.

As described above, when the anchor plate 15 is fixed to the receivers 11 and 11, the receivers 11 and 11 with respect to the level lines L marked on the inner wall surfaces 53 and 53 of the side wall portions 5A and 5B of the formwork 5. If the anchor plate 15 is attached to the inner wall surfaces of the side wall portions 5A and 5B with high accuracy, the anchor plate 15 can be attached to the formwork 5 with high accuracy in a short time via the pair of receivers 11 and 11.

Further, as shown in the above-mentioned construction method, in the present embodiment, the anchor plates 15 are not directly attached to the inner wall surfaces of the side wall portions 5A and 5B of the formwork 5, but the receivers 11 and 11 are attached to the side wall portions 5A. After attaching to 5B, the anchor plate 15 is attached to the receivers 11 and 11. Therefore, it is not necessary to directly adjust the height and horizontality of the anchor plate 15 when the anchor plate 15 is attached, and the working time can be shortened.

After fixing the anchor plate 15 with the fixture 20, the anchor bolts 2, 2, ... Are hung and held on the anchor plate 15. After that, ready-mixed concrete is poured into the formwork 5 and placed between the inner walls of the pair of side wall portions 5A and 5B to a predetermined height. The anchor bolts 2, 2 ... Supported by the anchor plate 15 are buried and fixed in a state where the upper end portion protrudes from the upper surface of the cast concrete foundation 1.

Further, since the anchor plate 15 is securely fixed to the side wall portions 5A and 5B of the formwork 5 by the receivers 11 and 11 fixed in a horizontal state, the surface rigidity of the anchor plate 15 can be increased. , The fixed state of the anchor bolt 2 is stable. As a result, when placing the ready-mixed concrete, pressure is applied to the lower end of the anchor bolt 2 by the ready-mixed concrete, but the displacement of the anchor bolt 2 and the like are suppressed, and the position accuracy of the buried anchor bolt 2 can be improved.

In this embodiment, as shown in FIG. 3, the length of the anchor plate 15 in the formwork width direction (Y direction) is the same as or slightly shorter than the distance W of the pair of side wall portions 5A and 5B. In line with this, two receiving portions 13 are provided in the receiving portion 11, and one first through hole 13a through which the fixing tool 20 is inserted is provided in each receiving portion 13 in order to fix the anchor plate 15. However, for example, as in the modified example shown in FIG. 8, by providing the first through holes 13a in two rows in each receiving portion 13, the fixing portion of the anchor plate 15 can be changed in the formwork width direction (Y direction). You may do so.

5. Construction jig 10A according to the second embodiment Next, the construction jig 10A according to the second embodiment will be described in detail with reference to FIGS. 9 and 10. This embodiment is different from the first embodiment in that the construction jig is provided with an attachment 25 that can be detachably attached to the anchor plate 15. Therefore, other configurations having substantially the same functions are designated by the same reference numerals and detailed description thereof will be omitted. In FIG. 9A, the attachment 25 is attached only to the first plate portion 15a in order to explain the presence or absence of the attachment 25, but the attachment 25 may also be attached to the first plate portion 15b. ..

In the first embodiment, the anchor bolt 2 is inserted and held through the insertion hole 2a of the anchor plate 15, but when the small diameter anchor bolt 2A is inserted through the insertion hole 2a, the insertion hole 2a, the small diameter anchor bolt 2A and the clearance are obtained. Therefore, the mounting accuracy of the anchor bolt 2A is lowered.

Therefore, the construction jig 10A according to the second embodiment further includes an attachment 25 that can be detachably attached to the anchor plate 15. In the first plate portions 15a and 15b of the anchor plate 15, rectangular engaging holes 17, 17 ... Are formed on the outside of the insertion holes 2a and 2a. The engaging holes 17, 17 ... Are engaging portions for detachably attaching the attachments 25, 25, which will be described later, to the anchor plate 15.

As shown in FIGS. 9A and 10A, the attachment 25 is made of a metal plate and is formed in a rectangular shape. The width of the attachment 25 is smaller than that of the first plate portion 15a of the anchor plate 15. The attachment 25 is formed with small diameter insertion holes 2b and 2b smaller than the insertion holes 2a at positions corresponding to the insertion holes 2a and 2a.

As shown in FIGS. 9A and 9B, the attachment 25 is engaged so that the small diameter insertion holes 2b and 2b are arranged at the positions where the insertion holes 2a and 2a of the anchor plate 15 are formed. Engagement protrusions 26, 26 that engage the holes 17, 17 are formed. By providing the engaging hole 17 and the engaging protrusion 26, the anchor plate 15 and the attachment 25 can be detached from each other. With the attachment 25 attached to the anchor plate 15 (the engagement hole 17 and the engagement protrusion 26 are engaged), the small diameter insertion holes 2b, at the positions where the insertion holes 2a and 2a of the anchor plate 15 are formed, 2b is arranged.

By using such an attachment 25, the anchor bolt 2A can be inserted into the small diameter insertion hole 2b that matches the diameter of the small diameter anchor bolt 2A, so that the mounting accuracy of the anchor bolt 2A can be improved.

A modified example of the attachment 25 shown in FIG. 10 (c) is shown. The attachment 25A projects at an angle of, for example, 45 ° with respect to the attachment body so that the tip of one engaging projection 27 faces the other engaging projection 27. When attaching the attachment 25A of this modified example, one engaging protrusion 27 is inserted into the engaging hole 17 so as to be hooked on the engaging hole 17, and then the other engaging protrusion 26 is inserted into the engaging hole 17. To do. As a result, the attachment 25A is caught on the anchor plate 15, and the attachment 25A is less likely to fall off from the anchor plate 15.

Also in this embodiment, by using the anchor plate 15 to which the attachment 25 is attached, it is possible to shorten the construction time of the anchor bolt 2 buried and fixed in the concrete foundation 1 and to shorten the construction time of the anchor bolt 2 as in the first embodiment. The position accuracy of the bolt 2 can be improved. An example of an engaging protrusion and an engaging hole is shown as an engaging portion for engaging the anchor plate 15 and the attachment 25. However, the present invention is not limited to this, and the anchor plate 15 may be provided with an engaging protrusion and the attachment 25 may be provided with an engaging hole. For example, the anchor plate 15 and the attachment 25 may be provided with a common screw hole. The anchor plate 15 may be attached to the attachment 25 by screwing a bolt into the screw hole of the above, and the structure is not particularly limited as long as the attachment 25 can be detachably attached to the anchor plate 15. Absent.

6. Construction jig 10B according to the third embodiment Next, still another embodiment of the anchor bolt construction jig according to the present invention will be described with reference to FIGS. 11 to 15. In the present embodiment, the shapes of the receiver 11 and the anchor plate 15 are different from those of the construction jig 10 of the anchor bolt 2 of the first embodiment. Further, in the present embodiment, the construction jig 10B further includes a pair of width stoppers. Therefore, other configurations having substantially the same functions are designated by the same reference numerals and detailed description thereof will be omitted.

In FIGS. 11 to 15, the construction jig 10B of the anchor bolt 2 is the same as the previous embodiment, with the pair of receivers 11 and 11 fixed to the pair of side wall portions 5A and 5B of the formwork 5. , At least an anchor plate 15 supported and fixed in a horizontal state to a pair of receivers 11 and 11. The pair of receivers 11 and 11 are basically formed of an L-shaped angle member (see FIG. 12 (c)). An inner wall mounting portion 12 attached to the inner wall surface of a pair of side wall portions 5A and 5B facing each other of the formwork 5, and a receiving portion protruding inward of the formwork 5 with the inner wall mounting portion 12 mounted on the inner wall surface. It has 13 and. In the present embodiment, the receiving portion 13 extends in the longitudinal direction (X direction) of the formwork.

The receiving portion 13 is formed with two first through holes 13a and 13a through which a fixture 20 such as a bolt or nut is inserted in order to fix the anchor plate 15. A rectangular opening window 13b is formed at an intermediate position between the first through holes 13a and 13a, and a V-shaped notch 13c is formed in the opening window 13b. The first through hole 13a is formed in a long hole long in the longitudinal direction (X direction) of the formwork, and adjusts the position of the anchor plate 45 when the fixture 20 is inserted into the long hole, as in the above-described embodiment. It is a long hole for adjustment that can be done.

As shown in FIG. 12B, three slits 44 are formed in the inner wall mounting portion 42 along the horizontal direction (X direction). The slit 44 located at the center is formed in an elongated rectangle, and the slits on both sides are formed in an elongated rectangle with an opening at the outer peripheral end. The receiver 41 can be fixed to the formwork 5 by inserting fasteners 21 such as screws and wood screws into the plurality of slits 44 and screwing them into the formwork 5.

In the present embodiment, the anchor plate 15 has a plate shape and extends in the formwork longitudinal direction (X direction) with a pair of first plate portions 15a and 15b extending in the formwork width direction (Y direction). , And three second plate portions 15c and 15d for connecting the first plate portions 15a and 15b. Insertion holes 2a in which anchor bolts 2 are arranged are formed in the first plate portions 15a and 15b, and supports supported by the receiving portions 13 of the receiver 11 at both ends of the first plate portions 15a and 15b. A portion of 15 g is formed. Similar to the first embodiment, the support portion 15g is formed with a second through hole 16 through which the fixture 20 is inserted so as to communicate with the first through hole 13a of the receiver 11. In this embodiment, unlike the first embodiment, the second plate portion 15e is not provided at the ends of the first plate portions 15a and 15b. Therefore, in the present embodiment, recesses 15f and 15f are formed on the peripheral edges of both ends of the anchor plate 15.

The anchor bolt construction jig 10B of the present embodiment includes a width stopper 50 that holds a distance W between the inner wall surfaces of the pair of side wall portions 5A and 5B. The width stopper 50 is arranged side by side on the anchor plate 45 and erected on the upper end surfaces of the pair of side wall portions 5A and 5B so as to pass the pair of side wall portions 5A and 5B of the formwork 5, and the width stopper 50 is installed on the upper end surfaces of the pair of side wall portions 5A and 5A. The distance W2 between the inner wall surfaces of 5B is fixed.

The width stopper 50 is formed of a metal plate material having a plate thickness of about 3 to 5 mm, and has a first plate-shaped portion 51 having a horizontal plane extending between the upper end surfaces of the pair of side wall portions 5A and 5B, and a pair of side walls. A second plate-shaped portion 52 having a vertical surface having an inner plate-shaped portion 52a passed between the inner wall surfaces of the portions 5A and 5B is provided. As a result, a cross section perpendicular to the longitudinal direction of the width stopper 50 is formed in an L shape, and the rigidity is increased.

As shown in FIGS. 11 and 15, the second plate-shaped portion 52 fits into the side wall portions 5A and 5B in a state where the first plate-shaped portion 51 is in contact with the upper end surfaces of the side wall portions 5A and 5B. Notches 52b and 52b are formed so as to fit each other. That is, the horizontal length of the inner plate-shaped portion 52a sandwiched between the notches 52b and 52b is the distance W between the pair of side wall portions 5A and 5B of the formwork 5, and the pair of width stoppers 50 makes the mold. The width of the flow path through which the ready-mixed concrete of the frame 5 flows is fixed.

A V-shaped notch 50a is formed at the center in the longitudinal direction around the outer periphery of the first plate-shaped portion 51 of the width stopper 50. By confirming that the notch portion 50a is aligned with the reference thread (water thread) stretched above the formwork 5, the width stopper 50 is appropriately fitted into the side wall portions 5A and 5B. It can be confirmed that they match.

Also in this embodiment, first, a level line is drawn on the side wall portions 5A and 5B of the formwork 5, and the receivers 11 and 11 are fixed to the side wall portion in accordance with the level line. Next, after installing the width stopper 50, the anchor plate 15 is placed on the fixed receivers 11 and 11, and the receiver 11 and the anchor plate 15 are fixed by the fixture 20. By such work, it is possible to shorten the construction time of the anchor bolt 2 buried and fixed in the concrete foundation 1 and to improve the position accuracy of the anchor bolt 2 as in the above-described embodiment.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs are designed without departing from the spirit of the present invention described in the claims. You can make changes.

For example, it goes without saying that the width stopper 50 used in the anchor bolt construction jig 10B of the third embodiment may be used for the anchor bolt construction jig 10 of the first and second embodiments. Further, in the present embodiment, the construction jig is applied to the straight portion (general portion that is straight in a plan view), but for example, this construction jig may be applied to the outside corner portion, the inside corner portion, and the like. Of course. Further, the inspection may be performed on an inspection plate having inspection holes formed according to the position of the anchor bolt after construction.

In the present embodiment, the second through hole 16 extends in the form width direction (Y direction) to form a long hole for alignment with the first through hole 13a, and the first through hole 13a is the length of the form. An elongated hole for adjustment extending in the direction and adjusting the position of the anchor plate 15 along the longitudinal direction of the formwork was used. However, for example, the first through hole 13a extends in the formwork width direction (Y direction) to form a long hole for alignment with the second through hole 16, and the second through hole 16 is formed in the formwork longitudinal direction. It may be an elongated hole for adjustment that extends to adjust the position of the anchor plate 15 along the longitudinal direction of the formwork. Further, either one of the first or second through hole 13a may be a round hole.

1: Concrete foundation 2: Anchor bolt, 2a: Insertion hole, 2b: Small diameter insertion hole, 5: Formwork, 5A, 5B: Pair of side wall parts, 6: Thick end angle, 7: Supporter, 10,10A, 10B : Anchor bolt construction jig, 11: Receiving tool, 12, 42: Inner wall mounting part, 13: Receiving part, 13a: First through hole (long hole for adjustment), 15, 15A: Anchor plate, 15f: Recessed part, 16,46: Second through hole (long hole for alignment), 17: Connecting part (engagement hole), 18: Reference line, 18a: Reference hole, 20: Fixture, 21: Stopper, 25,25A : Attachment, 26, 27: Connecting part (engagement protrusion), 50: Width stopper

Claims (7)

Anchor bolt construction jig for burying and fixing the anchor bolt in the concrete foundation so that the upper end of the anchor bolt protrudes upward from the upper surface of the concrete foundation formed by placing concrete in the formwork. And
An inner wall mounting portion attached to the inner wall surface of a pair of side wall portions facing each other of the formwork, and a receiving portion protruding inward of the formwork with the inner wall mounting portion mounted on the inner wall surface. A pair of receivers and
An anchor bolt construction jig characterized by comprising an anchor plate that holds the anchor bolt in a suspended state and is supported and fixed to each receiving portion of the receiving tool by a fixing tool. A first through hole through which the fixing tool is inserted is formed in the receiving portion of each of the receiving tools.
The anchor plate is formed with a second through hole through which the fixture is inserted together with the first through hole in a state where the anchor plate is supported by the receiver, and the anchor plate and the receiver are formed. Is fixed via the fixture,
One of the first and second through holes is an elongated hole for alignment with the other through hole, which extends in the formwork width direction in which the pair of side wall portions face each other. The anchor bolt construction jig according to claim 1, wherein the anchor bolt is constructed. A first through hole through which the fixing tool is inserted is formed in the receiving portion of each of the receiving tools.
The anchor plate is formed with a second through hole through which the fixture is inserted together with the first through hole in a state where the anchor plate is supported by the receiver, and the anchor plate and the receiver are formed. Is fixed via the fixture,
One of the first and second through holes extends in the longitudinal direction of the formwork, which is a direction orthogonal to the direction in which the pair of side wall portions face each other, and the anchor along the longitudinal direction of the formwork. The anchor bolt construction jig according to claim 1, wherein the holes are elongated holes for adjusting the position of the plate. Of the edge portions of the anchor plate, at least one of the side wall portions facing the inner wall surface is formed with a recess for allowing the lumbar wall muscles that rise upward along the inner wall surface to escape. The anchor bolt construction jig according to any one of claims 1 to 3. The claim is characterized in that the anchor plate includes a reference line for confirming that the anchor plate is arranged at a predetermined reference position, and a reference hole provided so as to penetrate the reference line. The anchor bolt construction jig according to any one of 1 to 4. The anchor plate is formed with an insertion hole through which the anchor bolt is inserted so as to suspend the anchor bolt from the anchor plate.
The construction jig includes an attachment that can be detachably attached to the anchor plate.
The attachment has a small-diameter insertion hole smaller than the insertion hole.
Claims 1 to 1, wherein the anchor plate and the attachment are detachably attached to each other so that the small-diameter insertion hole is arranged at a position where the insertion hole of the anchor plate is formed. Anchor bolt construction jig according to any one of 5. A foundation formwork structure provided with the anchor bolt construction jig according to any one of claims 1 to 6.
The formwork provided with the pair of side wall portions,
A pair of receivers horizontally fixed to the pair of side walls of the formwork,
Anchor plates fixed horizontally to the pair of receivers,
A foundation formwork structure comprising: an anchor bolt that is supported while being suspended from the anchor plate.

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