JP2023107463A - Foundation formwork structure - Google Patents

Abstract

To provide a foundation formwork structure of a building capable of stably fixing a foundation formwork and a top plate.SOLUTION: A fixture 5 has a screw 50, an upper support member 51, a lower support member 52, and a push-up member 53. The upper support member 51 has an upper pressing surface 51P that presses a formwork ruler 3 (a top plate) from above, and the lower support member 52 has a lower pressing surface 52P that presses an upper plate portion 22T of a formwork 2 from below according to rotation of the screw 50 when a head 50A of the screw 50 is operated. Since the head portion 50A faces the horizontal direction at a position lower than the upper pressing surface 51P, a worker can fix the formwork 2 and the formwork ruler 3 with the fixture 5 while easily operating the screw 50 using a tool.SELECTED DRAWING: Figure 5

Description

The present invention relates to a formwork structure for building foundations.

2. Description of the Related Art Conventionally, a foundation formwork structure for placing concrete to form a building foundation is known.

In Patent Document 1, as the foundation formwork structure, a pair of foundation formwork that forms a concrete placing space, and a top plate placed on the pair of formwork for positioning anchor bolts (anchor ruler) is disclosed. An insertion hole (pin hole) is formed in each formwork and anchor ruler, and the anchor ruler is positioned with respect to each formwork by inserting a fixing pin from above into the insertion hole.

2. Description of the Related Art When forming the foundation of a building at a work site, there are cases where, for example, adjacent top boards partially overlap each other or multiple top boards are used in an overlapping manner at external corners and internal corners. In addition, since it is desirable to reduce the number of types of top boards as much as possible at a work site, a limited number of types of top boards may be used for various types of foundation forms. For this reason, the positions of the pin holes may not match between the used foundation formwork and the top plate. In these areas, it is difficult to stably fix the foundation formwork and the top plate with pins. Positional accuracy of the positioning member may deteriorate.

FIG. 11 is a perspective view of a conventional metal fitting 5Z for preventing the top plate from lifting in the area where it is difficult to fix with pins as described above. The metal fitting 5Z includes a U-shaped metal fitting main body 50Z and a thumbscrew 51Z. The operator attaches the metal fitting body 50Z so that the foundation formwork and the top plate are sandwiched between the metal fitting body 50Z and tightens the thumbscrew 51Z, so that the tip of the thumbscrew 51Z and the top surface of the metal fitting body 50Z The formwork for the foundation and the top plate are sandwiched and fixed. In addition, around the upper surface of the foundation formwork, it is necessary to route a water line. be worn. In this case, if a bolt is used instead of the thumbscrew 51Z and a tool is used to turn the bolt from below, the tool interferes with the foundation formwork, making it difficult to tighten the thumbscrew 51Z.

JP 2021-195775 A

In the conventional metal fixture as shown in FIG. 11, it is necessary to tighten the thumbscrew 51Z from below at the work site. There was a problem that it was difficult to stably fix the top plate.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a building foundation formwork structure capable of stably fixing a foundation formwork and a top plate. With the goal.

The present invention provides a formwork structure for a foundation, comprising a vertical plate portion defining the side surface of the foundation of a building, and a lower retainer extending from the upper end of the vertical plate portion to the side opposite to the foundation. a foundation formwork having an upper plate portion extending in the extension direction of the mechanism and a downwardly extending portion extending downward from the tip portion of the upper plate portion in the extension direction; a top plate including a top plate end portion disposed above the downwardly extending portion, the top plate supporting the member to be positioned disposed in the foundation so as to position the member; a fixture capable of fixing the top plate and the top plate to each other so as to restrict horizontal and vertical movement of the top plate with respect to the top plate, wherein the fixture is a screw including a screw head and a male threaded portion extending from the screw head; an upper pressing surface capable of pressing the top plate from above; any one of the extending direction, the upward direction, and the cross direction in which the screw head includes a first hole disposed below the surface and receives the male threaded portion and intersects with both the extending direction and the upward direction at an acute angle; an upper pressing member having a screw receiving portion for receiving the screw head so as to face one direction; and a lower pressing surface that presses the upper plate portion from below as the screw rotates as the screw head is operated. and a lower pressing mechanism capable of holding the plate portion and the top plate.

According to this configuration, the operator can tighten the screw while manipulating the screw head facing any one of the horizontal direction, the upward direction, and the cross direction. As compared with the case of tightening the screw, workability in attaching the fixture can be improved. As a result, it is possible to shorten the time required for fixing and detaching the top plate. In addition, since the screw receiving portion for receiving the screw head is arranged outside the downward extending portion and below the upper pressing surface, the screw head is positioned above the upper pressing member when the fixture is attached. It is possible to prevent interference between the thread and the screw arranged around the upper surface of the foundation form without protruding.

In the above configuration, the screw receiving portion of the upper pressing member is arranged such that the screw head faces the extending direction, and the lower pressing mechanism includes the lower pressing surface and moves up and down to the male screw portion. a moving member that can be supported; and an engaging member that includes the internal thread, one of the moving member and the engaging member having an inclined surface that is inclined with respect to the extending direction, and The other of the moving member and the engaging member has a sliding contact portion that is in sliding contact with the inclined surface, and the inclined surface is pressed downward by sliding contact with the sliding contact portion when the screw head is operated. It may be inclined in a direction in which the surface can be pushed up.

According to this configuration, the lower pressing mechanism is composed of the moving member and the engaging member, one of the moving member and the engaging member having the inclined surface and the other having the sliding contact portion. are doing. Therefore, even in a structure in which the male threaded portion of the screw extends in the horizontal direction, the axial force generated when the screw rotates is converted into the vertical movement force of the moving member, and the upper holding member and the moving member move. The member can stably hold the top plate and the upper plate portion of the foundation formwork.

In the above configuration, the moving member is formed with a through-hole extending vertically through the moving member. It may be supported by the part so as to be able to move up and down.

According to this configuration, the moving member can be moved in the vertical direction according to the axial force of the screw, and the moving member can be prevented from being detached from the male thread portion when attaching and detaching the fixture.

In the above configuration, the lower pressing mechanism includes a housing portion capable of housing the downward extending portion in a state in which the upper pressing member and the lower pressing mechanism sandwich the upper plate portion and the top plate. may have.

According to this configuration, even when the downwardly extending portion is arranged on the upper plate portion, interference between the downwardly extending portion and the lower pressing mechanism is prevented when the fixture is mounted, and the upper pressing surface and the lower pressing surface are prevented from interfering with each other. The side pressing surfaces can firmly hold the top plate and the upper plate portion.

In the above configuration, the lower pressing mechanism may have an inclined portion inclined downward along the extending direction so as to connect the lower pressing surface and the accommodating portion to each other.

According to this configuration, it is possible to prevent strong interference between the downwardly extending portion and the lower pressing mechanism when attaching the fixture.

In the above configuration, the first hole of the upper pressing member includes a first elongated hole extending in a width direction perpendicular to the extending direction and the vertical direction, and separated from the first elongated hole in the width direction. a second elongated hole portion extending in the width direction at a position further from the upper pressing surface than the first elongated hole portion; and the first elongated hole portion and the second elongated hole portion communicate with each other. It may have a communicating hole.

According to this configuration, even when a plurality of top plates are arranged so as to overlap each other, the screws are positioned between the first long hole portion and the second long hole portion according to the number of top plates. By changing, the top plate and the upper plate portion can be stably fixed.

In the above configuration, the screw receiving portion of the upper holding member is arranged such that the screw head faces the cross direction, and the female thread portion of the lower holding mechanism is driven by the operation of the screw head. The lower pressing mechanism may be screwed with the male threaded portion along the intersecting direction so that the lower pressing mechanism moves upward in the extending direction as the screw rotates.

According to this configuration, since the screw head of the screw faces at least upward, it is possible to further facilitate the mounting operation of the fixture.

In the above configuration, the screw receiving portion of the upper holding member is arranged such that the screw head faces the upward direction, and the female thread portion of the lower holding mechanism is driven by the operation of the screw head. The lower pressing mechanism may be threadedly engaged with the male screw portion along the vertical direction so that the lower pressing mechanism moves upward as the screw rotates.

According to this configuration, since the operator can operate the screw head of the screw from above, it is possible to easily perform the work of fixing the fixture.

In the above configuration, the upper pressing member may have contact surfaces capable of contacting respective ends of the upper plate portion and the top plate in the extending direction.

According to this configuration, the top plate can be easily positioned in the horizontal direction with respect to the upper plate portion of the foundation formwork.

In the above configuration, the upper pressing member may further have an auxiliary engaging portion that can engage with the top plate on the side opposite to the contact surface in the extending direction.

According to this configuration, in addition to the contact surface, the relative position of the top plate to the upper plate portion can be stably regulated at the auxiliary engagement portion.

ADVANTAGE OF THE INVENTION According to this invention, the formwork structure for foundations of a building which can fix a formwork for foundations and a top plate stably is provided.

1 is a perspective view of a foundation formwork structure according to a first embodiment of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the formwork structure for foundations which concerns on 1st Embodiment of this invention. 1 is a front view of a fixture according to a first embodiment of the present invention; FIG. FIG. 4 is a perspective view of a lower support member of the fixture according to the first embodiment of the present invention; FIG. 2 is a front view of a state in which a foundation formwork and a top board are fixed by fixing fittings according to the first embodiment of the present invention; FIG. 8 is a perspective view of a state in which a foundation formwork and a top plate are fixed by fixing fittings according to a second embodiment of the present invention; FIG. 11 is a side view of an upper support member of the fixture according to the second embodiment of the present invention; FIG. 11 is a front view showing how the foundation formwork and the top plate are fixed by the fixtures according to the third embodiment of the present invention. FIG. 11 is a front view showing how the foundation formwork and the top plate are fixed by the fixtures according to the third embodiment of the present invention. FIG. 11 is a front view showing how the foundation formwork and the top board are fixed by the fixtures according to the fourth embodiment of the present invention. FIG. 10 is a perspective view of a conventional metal fitting for preventing the top plate from lifting.

<First Embodiment>
A foundation formwork structure 1 according to each embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a foundation formwork structure 1 according to this embodiment. FIG. 2 is a sectional view of the formwork structure 1 for foundation. In each figure, the front-rear direction, the left-right direction, and the up-down direction are illustrated for ease of explanation. These directions are not intended to limit the invention.

The foundation formwork structure 1 includes a pair of left and right formworks 2 (foundation formwork), a formwork ruler 3, a plurality of pins 4, fixtures 5 (fixtures), and anchor bolts 6 (members to be positioned). ) and

A pair of left and right forms 2 are members for forming the foundation of a building. As shown in FIG. 2, concrete C is poured between a pair of forms 2 to form the foundation. In this embodiment, each mold 2 has a vertical plate 21 (vertical plate portion) and a plurality of horizontal plates 22 . Vertical plates 21 define the sides of the foundation. The plurality of horizontal plates 22 are fixed to the outer surface of the vertical plate 21 at intervals in the vertical direction. The uppermost horizontal plate 22 among the plurality of horizontal plates 22 is referred to as an upper plate portion 22T. The upper plate portion 22T extends horizontally from the upper end portion of the vertical plate 21 toward the side opposite to the base. A downwardly extending portion 22S is provided at the tip of the upper plate portion 22T in the extending direction. The downward extending portion 22S has a function of increasing the rigidity of the upper plate portion 22T.

The formwork ruler 3 constitutes the top plate of the present invention. As shown in FIG. 2, the formwork ruler 3 is arranged so as to straddle the left and right upper plate portions 22T, and is arranged so as to overlap each upper plate portion 22T from above. The formwork ruler 3 includes a ruler end portion 3S (top board end portion) arranged above the downwardly extending portion 22S. The formwork ruler 3 supports the anchor bolt 6 so as to position the anchor bolt 6 arranged in the foundation.

A plurality of pins 4 (FIG. 1) secure the formwork 2 and the formwork ruler 3 . For this reason, the upper plate portion 22T of the mold 2 and the mold ruler 3 are provided with pin holes (not shown). By inserting the pins 4 through these pin holes, the formwork ruler 3 is restrained with respect to the formwork 2, especially in the horizontal direction.

The fixing bracket 5 fixes the upper plate portion 22T and the formwork ruler 3 to each other so as to restrict the horizontal and vertical movement of the formwork ruler 3 with respect to the upper plate portion 22T. As described above, if the positions of the pin holes for inserting the pins 4 do not match between the upper plate portion 22T and the formwork ruler 3, it is difficult to fix the two with the pins 4. FIG. In addition, the formwork ruler 3 tends to be lifted from the upper plate portion 22T even in a portion where a plurality of formwork rulers 3 overlap, and the positional accuracy of the anchor bolts 6 may deteriorate. Therefore, in this embodiment, regardless of the arrangement of the pins 4 and the presence or absence of the pins 4, the fixing metal fittings 5 can stably fix the upper plate portion 22T and the formwork ruler 3. As shown in FIG. Note that the operator may mount the fixture 5 at an arbitrary position.

FIG. 3 is a front view of the fixture 5 according to this embodiment. FIG. 4 is a perspective view of the lower support member 52 of the fixture 5 according to this embodiment. FIG. 5 is a front view of the formwork 2 and the formwork ruler 3 fixed by the fixtures 5 .

The fixture 5 has a screw 50, an upper support member 51, a lower support member 52 (moving member), and a push-up member 53 (engaging member). The upper supporting member 51 constitutes the upper pressing member of the present invention, and the lower supporting member 52 and the push-up member 53 constitute the lower pressing mechanism of the present invention.

The screw 50 has a head portion 50A (screw head) and a shaft portion 50B extending from the head portion 50A. The shaft portion 50B corresponds to a male screw portion. In this embodiment, the head 50A is composed of a hexagonal head.

The upper support member 51 is composed of an L-shaped plate member. The upper support member 51 has a horizontal portion 511 and a vertical portion 512 . As shown in FIG. 5, the horizontal part 511 is arranged so as to overlap the formwork ruler 3 from above. The horizontal portion 511 has an upper pressing surface 51P. The upper pressing surface 51P is a lower surface portion of the horizontal portion 511, and can press the formwork ruler 3 from above. The vertical portion 512 is arranged perpendicular to the horizontal portion 511 . The inner surface of the vertical portion 512 constitutes a contact surface 512P that can contact the ruler end 3S and the downwardly extending portion 22S. A screw receiving portion 512T is arranged at the lower end portion of the vertical portion 512 . As shown in FIG. 5, the screw receiving portion 512T is arranged outside the downward extending portion 22S in the extending direction (right direction in FIG. 5) and below the upper pressing surface 51P. The screw receiving portion 512T includes a round hole portion 512S (first hole portion) (FIG. 3) for receiving the shaft portion 50B of the screw 50. As shown in FIG. The inner diameter of the hole portion 512S is set larger than the outer diameter of the shaft portion 50B. In this embodiment, the screw receiving portion 512T receives the head portion 50A so that the head portion 50A faces the extension direction (the right direction in FIG. 3).

The lower support member 52 is a member capable of holding the upper plate portion 22T and the formwork ruler 3 between itself and the upper support member 51 . 3 and 4, the lower support member 52 has an inclined plate 521 and a pair of side plates 522. As shown in FIG. The inclined plate 521 is a plate-like portion extending so as to be inclined with respect to the horizontal direction. The inclined plate 521 is provided with a surface 52T (FIG. 3) (sliding contact portion) to be pushed up. The pushed-up surface 52T is an inclined surface that slopes downward along the extension direction (rightward direction). Further, the inclined plate 521 is formed with a hole portion 52S (through hole) extending vertically through the inclined plate 521 so as to be exposed on the surface 52T to be pushed up. The shaft portion 50B of the screw 50 is inserted through the hole portion 52S. As a result, the lower support member 52 is vertically movably supported by the shaft portion 50B.

A pair of side plates 522 are connected to both ends of the inclined plate 521 so as to face each other. Each side plate 522 has a lower pressing surface 52P, an inclined portion 522A, and a notch portion 522B (accommodating portion). The lower pressing surface 52P corresponds to the upper end portion of the lower support member 52, and has a function of pressing the upper plate portion 22T from below as the screw 50 rotates when the head portion 50A of the screw 50 is operated. The surface 52T (FIG. 3) to be pushed up of the inclined plate 521 described above is arranged below the lower pressing surface 52P of the side plate 522. As shown in FIG.

The inclined portion 522A and the cutout portion 522B are arranged at the corners of each side plate 522 as shown in FIG. The notch portion 522B is a portion obtained by cutting out a portion of the side plate 522 at right angles. As shown in FIG. 5, the notch portion 522B has a function of receiving (accommodating) the downward extension portion 22S in a state where the upper support member 51 and the lower support member 52 sandwich the upper plate portion 22T and the formwork ruler 3. are doing. The inclined portion 522A is an inclined portion that is inclined downward along the extension direction so as to connect the lower pressing surface 52P and the notch portion 522B to each other. The inclined portion 522A functions as a guiding portion that prevents interference between the downward extending portion 22S and the fixing metal fitting 5 when the fixing metal fitting 5 is attached to the upper plate portion 22T and the formwork ruler 3 .

The push-up member 53 engages with the shaft portion 50B on the side opposite to the screw receiving portion 512T when viewed from the lower support member 52 . The push-up member 53 is a trapezoidal member when viewed from the front, and a screw hole 53S (second hole) is formed so as to pass through the push-up member 53 (FIG. 3). The screw hole 53S receives the shaft portion 50B inserted through the hole portion 512S (FIG. 3) of the screw receiving portion 512T and the hole portion 52S of the lower support member 52 in this order. A female threaded portion 53SA that is screwed with the shaft portion 50B is formed in the screw hole 53S. Further, a push-up surface 53T (inclined surface) is arranged above the screw hole 53S in the push-up member 53. As shown in FIG. The push-up surface 53T is an inclined surface that slopes downward along the extension direction. The push-up surface 53T has a function of slidingly contacting the push-up surface 52T of the lower support member 52 and pushing up the push-up surface 52T as the screw 50 is rotated by operating the head 50A of the screw 50. .

Next, a procedure for fixing the upper plate portion 22T of the formwork 2 and the formwork ruler 3 to each other with the fixing fittings 5 will be described. In FIG. 3, when the screw 50 is rotated so that the push-up member 53 moves leftward relative to the shaft portion 50B, the distance between the push-up member 53 and the screw receiving portion 512T increases. As described above, since the lower support member 52 can move up and down along the hole 52S with respect to the shaft portion 50B, the lower support member 52 moves downward from the state shown in FIG. can do. As a result, the space between the upper pressing surface 51P and the lower pressing surface 52P is widened, so that the fixture 5 can be mounted so as to receive the formwork ruler 3 and the upper plate portion 22T in the space.

At this time, in the present embodiment, since the lower support member 52 has the inclined portion 522A, it is possible to mount the fixture 5 so that the distal end portion of the downwardly extending portion 22S moves along the inclined portion 522A. Therefore, it is possible to suppress strong interference between the lower support member 52 and the downwardly extending portion 22S. When the fixture 5 is attached to the formwork ruler 3 and the upper plate portion 22T, the operator operates the head portion 50A of the screw 50 to tighten the screw 50. As shown in FIG. As a result, the screw engagement between the shaft portion 50B and the female thread portion 53SA moves the push-up member 53 closer to the screw receiving portion 512T. At this time, the push-up surface 53T of the push-up member 53 pushes up the pushed-up surface 52T of the lower support member 52, thereby moving the lower support member 52 upward. As a result, the upper pressing surface 51P of the upper supporting member 51 and the lower pressing surface 52P of the lower supporting member 52 can sandwich and fix the formwork ruler 3 and the upper plate portion 22T from above and below. At this time, as shown in FIG. 5, the cutout portion 522B of the lower support member 52 can receive and accommodate the downwardly extending portion 22S. , the interference between the downward extending portion 22S and the lower support member 52 is prevented. Note that the downwardly extending portion 22S may contact the notch portion 522B in a state in which the upper plate portion 22T and the formwork ruler 3 are fixed.

As described above, in this embodiment, the fixing bracket 5 can stably fix the upper plate portion 22T of the formwork 2 and the formwork ruler 3 . At this time, the operator can tighten the screw 50 while manipulating the head portion 50A facing in the horizontal direction (extending direction). In comparison, workability in mounting the fixture 5 can be improved. As a result, it is possible to shorten the time required for fixing and removing the formwork ruler 3 . A well-known tool such as an impact driver can be used to tighten the screw 50 . Also, the structure of the head 50A is not limited to a hexagonal structure.

Further, in this embodiment, the screw receiving portion 512T that receives the head portion 50A is arranged outside the downward extending portion 22S and below the upper pressing surface 51P. Therefore, when the fixture 5 is attached, the head portion 50A does not protrude above the horizontal portion 511, and the screw 50 does not interfere with the thread or the like arranged around the upper surface of the formwork 2. can be prevented.

Further, in this embodiment, the lower pressing mechanism is composed of the lower support member 52 and the push-up member 53, each of which has an inclined push-up surface 52T and a push-up surface 53T. The push-up surface 53T is inclined with respect to the extension direction. Further, the surface 52T to be pushed up is also inclined with respect to the extension direction, and is slidably contactable with the push-up surface 53T. The push-up surface 53T is inclined in a direction in which the lower push surface 52P can be pushed up by sliding contact with the push-up surface 52T when the head 50A of the screw 50 is operated. Therefore, even in a structure in which the shaft portion 50B is arranged to extend horizontally in order to improve the operability of the screw 50, the axial force generated when the screw 50 rotates can be used to move the lower support member 52 in the vertical direction. The force can be converted into a force, and the upper plate portion 22T and the formwork ruler 3 can be stably held between the upper support member 51 and the lower support member 52 .

Further, in the present embodiment, the shaft portion 50B is inserted through the hole portion 52S formed in the lower support member 52, so that the lower support member 52 is supported by the shaft portion 50B so as to be vertically movable. Therefore, the lower support member 52 can be moved vertically according to the axial force of the screw 50, and the lower support member 52 can be prevented from being detached from the shaft portion 50B when the fixing metal fitting 5 is attached or detached.

Furthermore, in the present embodiment, the contact surface 512P (FIG. 5) of the upper support member 51 is the ruler end 3S of the formwork ruler 3 and the downward extending portion 22S of the upper plate portion 22T. The tips can each be abutted. Therefore, the relative position of the formwork ruler 3 in the horizontal direction with respect to the upper plate portion 22T can be easily determined.

<Second embodiment>
Next, a foundation formwork structure 1 according to a second embodiment of the present invention will be described. Note that, in this embodiment, differences from the first embodiment will be mainly described. The same applies to the embodiments described later.

FIG. 6 is a perspective view of the formwork 2 and the formwork ruler 3 fixed by the fixtures 5 according to the present embodiment. FIG. 7 is a side view of the upper support member 51 of the fixture 5 according to this embodiment.

In this embodiment, a hole 512S (FIG. 7) opened in the vertical portion 512 of the upper support member 51 extends long in the front-rear direction (the width direction perpendicular to the extension direction and the vertical direction). Specifically, the hole portion 512S has an upper insertion portion S1 (first long hole portion), a lower insertion portion S2 (second long hole portion), and a communication portion S3 (communication hole).

The upper insertion portion S1 extends in the front-rear direction at the rear portion of the vertical portion 512, as shown in FIG. The lower insertion portion S2 extends in the front-rear direction at a position separated from the upper insertion portion S1 in the front-rear direction and at a position lower than the upper insertion portion S1 (away from the upper pressing surface 51P). The communication portion S3 obliquely communicates the upper insertion portion S1 and the lower insertion portion S2.

In this embodiment, the shaft portion 50B and the horizontal portion 511 ( 5) changes in the vertical direction. Therefore, as shown in FIG. 6, when there is a region where the two formwork rulers 3 partially overlap in the foundation formwork structure 1, by arranging the screw 50 in the lower insertion portion S2, The upper plate portion 22T and the two formwork rulers 3 can be stably fixed. On the other hand, as in the first embodiment, in the area where one formwork ruler 3 is arranged on the upper plate portion 22T, the screw 50 is arranged in the upper insertion portion S1 so that the formwork ruler 3 and The upper plate portion 22T can be stably fixed.

Furthermore, as described above, in the area where one formwork ruler 3 is arranged on the upper plate portion 22T, when mounting the fixing bracket 5, the screw 50 is first arranged in the lower insertion portion S2. With this arrangement, the distance between the upper pressing surface 51P and the lower pressing surface 52P can be set wider, so that the fixture 5 can be easily attached. After the upper plate portion 22T and the formwork ruler 3 are sandwiched between the upper support member 51 and the lower support member 52, the operator moves the screw 50 from the lower insertion portion S2 to the upper insertion portion S1. Stable fixing work can be realized. In FIG. 7, in addition to the upper insertion portion S1 and the lower insertion portion S2, other insertion portions may be provided stepwise.

<Third Embodiment>
Next, a foundation formwork structure 1 according to a third embodiment of the present invention will be described. 8 and 9 are front views showing how the formwork 2 and the formwork ruler 3 are fixed by the fixtures 5 according to this embodiment. This embodiment differs from the first embodiment in the fastening direction of the screw 50 and the configuration of the lower pressing mechanism.

Referring to FIG. 8, in the present embodiment, a screw receiving portion 512M is arranged at the tip portion of the vertical portion 512 of the upper support member 51. As shown in FIG. The screw receiving portion 512M is formed by bending the lower portion of the vertical portion 512 outward in the extension direction. A hole (not shown) for receiving the shaft portion 50B is also formed in the screw receiving portion 512M. As shown in FIG. 8, the screw receiving portion 512M receives the shaft portion 50B so that the head portion 50A faces rightward and upward. The direction in which the head 50A faces corresponds to the intersecting direction that intersects both the extending direction and the upward direction at an acute angle. In this embodiment, the acute angle is set at 45 degrees.

A hook portion 511M (auxiliary engagement portion) is arranged on the horizontal portion 511 of the upper support member 51 . The hook portion 511M has a function of engaging with the formwork ruler 3 on the side opposite to the vertical portion 512 (contact surface 512P) in the extension direction. As an example, as shown in FIG. 1, when the formwork ruler 3 has an opening 3H, the hook 511M can be engaged with the end of the opening 3H. As a result, together with the contact surface 512P, the relative position of the formwork ruler 3 with respect to the upper plate portion 22T can be stably regulated. Also, when the fixing metal fitting 5 is temporarily attached, the fixing metal fitting 5 can be easily locked to the formwork ruler 3 by using the hook portion 511M.

Referring to FIG. 8, in the present embodiment, the push-up member 53 of the first embodiment is not provided, and the lower support member 52 constitutes a lower pressing mechanism. The lower support member 52 has a lower pressing surface 52P and a hole 52S (second hole). A female screw portion 52SA is provided in the hole portion 52S. The female threaded portion 52SA is formed in an oblique direction (intersecting direction) so that the lower support member 52 moves upward in the extending direction (rightward direction in FIG. 8) as the screw 50 rotates as the head portion 50A is operated. ) along the shaft portion 50B.

Moreover, in this embodiment, the screw 50 further includes a bulging portion 50C. The bulging portion 50C is a portion of the distal end of the shaft portion 50B, the outer diameter of which is partially set to be large. The swelling portion 50</b>C prevents the lower support member 52 from coming off the screw 50 .

Also in this embodiment, the distance between the upper pressing surface 51P and the lower pressing surface 52P can be widened by loosening the screw 50 so that the lower support member 52 is separated from the screw receiving portion 512M. Therefore, the operator can attach the fixture 5 so that the formwork ruler 3 and the upper plate portion 22T are sandwiched between the upper pressing surface 51P and the lower pressing surface 52P. Thereafter, the operator rotates the screw 50 using the tool 100 or the like shown in FIG. 9, thereby moving the lower support member 52 rightward (extending direction) and upward as indicated by the arrow in FIG. As a result, the formwork ruler 3 and the upper plate portion 22T can be firmly fixed from above and below by the upper pressing surface 51P and the lower pressing surface 52P.

In addition, in this embodiment, the head portion 50A of the screw 50 faces upward compared to the previous first embodiment, so that the attachment work of the fixture 5 can be performed more easily. Also in this embodiment, since the head portion 50A of the screw 50 is arranged at a low position, it is possible to prevent interference between the thread and the screw 50 at the work site.

<Fourth Embodiment>
Next, a foundation formwork structure 1 according to a fourth embodiment of the present invention will be described. FIG. 10 is a front view showing how the formwork 2 and the formwork ruler 3 are fixed by the fixtures 5 according to this embodiment.

In this embodiment, the fixture 5 has a screw 50, an upper support member 55 (upper pressing member), and a lower supporting member 56 (lower pressing mechanism).

The upper support member 55 has a first upper horizontal portion 551 , an upper vertical portion 552 and a second upper horizontal portion 553 . The first upper horizontal portion 551 includes an upper pressing surface 55P. The upper vertical portion 552 includes a contact surface 552P. A screw hole 553S for receiving the shaft portion 50B of the screw 50 is formed in the second upper horizontal portion 553 . Threaded hole 553S includes an internal thread.

The lower support member 56 has a first lower horizontal portion 561 , a lower vertical portion 562 and a second lower horizontal portion 563 . The first lower horizontal portion 561 includes a lower pressing surface 56P. The second lower horizontal portion 563 is formed with a screw hole 563S for receiving the shaft portion 50B. Threaded hole 563S includes an internal thread.

In this embodiment, the second upper horizontal portion 553 of the upper support member 55 functions as a screw receiving portion. The second upper horizontal portion 553 is arranged such that the head portion 50A faces upward. The female threaded portion of the screw hole 563S is threadedly engaged with the shaft portion 50B along the vertical direction so that the lower support member 56 moves upward as the screw 50 rotates as the head portion 50A is operated. do.

According to such a configuration, the operator can operate the head portion 50A from above using a tool (not shown), so that the fixation work of the fixture 5 can be easily performed. Also in this embodiment, since the head portion 50A of the screw 50 is arranged at a low position, it is possible to prevent interference between the thread and the screw 50 at the work site.

Although the foundation formwork structure 1 according to each embodiment of the present invention has been described above, the present invention is not limited to this, and for example, the following modified embodiments can be adopted.

(1) In each of the above embodiments, the anchor bolt 6 is used as the member to be positioned supported by the formwork ruler 3, but the member to be positioned may be a partition member for determining the shape of the foundation.

(2) In the above-described first embodiment, the lower support member 52 includes the inclined plate 521 and the pair of side plates 522. However, the lower support member 52 includes the inclined plate 521 and the pair of side plates 522. It may be a box-shaped member.

(3) In the above-described first embodiment, the push-up surface 53T of the push-up member 53 constitutes the inclined surface of the present invention, and the pushed-up surface 52T of the lower support member 52 constitutes the sliding contact portion of the present invention. Embodiments have been described, but the mechanism for pushing up the lower support member 52 is not limited to these embodiments. That is, one of the moving member and the engaging member of the present invention has an inclined surface inclined with respect to the extending direction, and the other of the moving member and the engaging member slides in contact with the inclined surface. It may have a contact portion. In this case, the inclined surface may be inclined in a direction in which the lower pressing surface 52P can be pushed up by sliding contact with the sliding contact portion when the head 50A is operated. As an example, the push-up member 53 may be arranged between the lower support member 52 and the screw receiving portion 512T, and the inclination direction of the pushed-up surface 52T and the push-up surface 53T may be inclined upward with respect to the extension direction. good. Moreover, the present invention is not limited to the configuration in which both the surface to be pushed up 52T and the surface to be pushed up 53T are inclined surfaces. One of the above may be a corner portion in slidable contact with the other inclined surface.

1 foundation formwork structure 100 tool 2 formwork 21 vertical plate 22 horizontal plate 22T upper plate portion 22S downward extending portion 3 formwork ruler 3S ruler end portion 4 pin 5 fixture 50 screw 50A head 50B shaft portion 50C swelling portion 51 Upper support member 511 Horizontal portion 511M Hook portion 512 Vertical portion 512P Contact surface 512M, 512T Screw receiving portion 512S Hole portion 51P Upper pressing surface 52 Lower supporting member 521 Inclined plate 522 Side plate 522A Inclined portion 522B Notch portion 52P Lower pressing surface 52S hole portion 52SA female screw portion 52T push-up surface 53 push-up member 53S screw hole 53SA female screw portion 53T push-up surface 55 upper support member 551 first upper horizontal portion 552 upper vertical portion 553 second upper horizontal portion 553S screw hole 55P upper pressing surface 56 Lower support member 561 First lower horizontal portion 562 Lower vertical portion 563 Second lower horizontal portion 563S Screw hole 56P Lower pressing surface 6 Anchor bolt C Concrete S1 Upper insertion portion S2 Lower insertion portion S3 Communicating portion

Claims (10)

A vertical plate portion defining a side surface of a foundation of a building, an upper plate portion extending in an extending direction from an upper end portion of the vertical plate portion toward a side opposite to the foundation, and a front end portion of the upper plate portion in the extending direction a downward extension extending downward from a foundation formwork;
A top plate arranged to overlap the upper plate portion from above, the top plate including an end portion of the top plate arranged above the downwardly extending portion, and configured to position a member to be positioned that is arranged in the foundation. a top plate that supports the member to be positioned on the
a fixture capable of fixing the upper plate portion and the top plate to each other so as to restrict the movement of the top plate in the horizontal direction and the vertical direction with respect to the upper plate portion;
with
The fixture is
a screw including a screw head and a male threaded portion extending from the screw head;
an upper pressing surface capable of pressing the top plate from above; and a first hole disposed outside the downwardly extending portion in the extending direction and below the upper pressing surface for receiving the male screw portion. a screw receiving portion that receives the screw head so that the screw head faces in one of the extending direction, the upward direction, and the crossing direction that intersects both the extending direction and the upward direction at an acute angle. an upper pressing member having
a female screw portion defining a second hole portion for receiving the male screw portion inserted through the first hole portion and screwed with the male screw portion; a lower pressing mechanism having a lower pressing surface for pressing the plate portion from below and capable of sandwiching the upper plate portion and the top plate with the upper pressing member;
A formwork structure for a foundation. The screw receiving portion of the upper pressing member is arranged such that the screw head faces the extending direction,
The lower holding mechanism is
a moving member including the lower pressing surface and supported by the male screw portion so as to be vertically movable;
an engaging member including the female thread;
has
One of the moving member and the engaging member has an inclined surface that is inclined with respect to the extending direction, and the other of the moving member and the engaging member has a sliding contact portion that makes sliding contact with the inclined surface. ,
2. The foundation formwork structure according to claim 1, wherein said inclined surface is inclined in a direction in which said lower pressing surface can be pushed up by sliding contact with said sliding contact portion when said screw head is operated. . The moving member is formed with a through hole penetrating the moving member so as to extend in the vertical direction, and the moving member can move vertically to the male threaded portion by inserting the male threaded portion into the through hole. 3. A foundation formwork structure according to claim 2, supported by a 3. The lower pressing mechanism has an accommodating portion capable of accommodating the downward extending portion in a state in which the upper pressing member and the lower pressing mechanism sandwich the upper plate portion and the top plate. Or the formwork structure for foundations according to 3. 5. The foundation formwork according to claim 4, wherein the lower pressing mechanism has an inclined portion inclined downward along the extending direction so as to connect the lower pressing surface and the accommodating portion to each other. structure. The first hole portion of the upper pressing member includes a first long hole portion extending in a width direction perpendicular to the extending direction and the vertical direction, and a position apart from the first long hole portion in the width direction and the first hole portion. a second elongated hole portion extending in the width direction at a position further from the upper pressing surface than the first elongated hole portion; and a communication hole communicating the first elongated hole portion and the second elongated hole portion with each other. A foundation formwork structure according to any one of claims 2 to 5, comprising: The screw receiving portion of the upper pressing member is arranged such that the screw head faces the cross direction,
The female threaded portion of the lower holding mechanism extends along the intersecting direction so that the lower holding mechanism moves in the extending direction and upward as the screw rotates as the screw head is operated. The foundation formwork structure according to claim 1, which is screwed with the male threaded portion. The screw receiving portion of the upper pressing member is arranged such that the screw head faces upward,
The female threaded portion of the lower pressing mechanism extends along the vertical direction with the male threaded portion so that the lower pressing mechanism moves upward as the screw rotates as the screw head is operated. The foundation formwork structure according to claim 1, which is screwed together. The foundation according to any one of claims 1 to 8, wherein the upper pressing member has contact surfaces capable of contacting respective ends of the upper plate portion and the top plate in the extending direction. formwork structure. 10. The foundation formwork structure according to claim 9, wherein said upper holding member further has an auxiliary engaging portion capable of engaging with said top plate on a side opposite to said contact surface in said extending direction.

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