JP2010037933A - Form installing tool and concrete form construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable disassembling work of a concrete form in a small number of processes. <P>SOLUTION: The form installing tool comprising an inside form installing tool having a fastening receiving part formed to protrude to an outside surface of a sheathing board through an installing hole from the inside surface of the sheathing board having the installing hole, an inside surface clamping part for supporting the inside surface of the sheathing board fixed to the fastening receiving part, and a female screw part engaged with a male screw part of a form interval holding tool formed at the inside of the inside surface pinching part, and an outside form installing tool having an fastened part fastened to the fastening receiving part from the outside surface of the sheathing board, an outside surface clamping part for holding the sheathing board together with the inside surface clamping part fixed to the fastened part, a trunk part fixed to the fastened part, and a tool engagement part with which a predetermined tool formed at the trunk part engages. The fastening receiving part and the fastened part are formed to be mutually unturnably fastened around an axis vertical to the sheathing board while loosening a clamping force to the sheathing board by the inside surface clamping part and the outside surface clamping part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a formwork fixture used for assembling and dismantling formwork used for concrete formwork and a concrete formwork method using the same.

  In dismantling the formwork of the conventional concrete formwork method, the thick ends are disassembled after the concrete is hardened, the formwork fixtures such as foam ties that support the end thickeners are removed, and the formwork panels are then made concrete. After removal from the housing, the plastic cone is often removed and the work is completed.

  As described above, since there are many procedures in the dismantling work of the formwork, labor is required and the work is complicated. In view of such a problem, an object of the present invention is to enable a concrete formwork to be dismantled with a small number of steps.

In order to solve the above problems, the present invention has the following configuration.
The invention according to claim 1 is a formwork fixture having an inner formwork fixture and an outer formwork fixture. The inner formwork fixture includes a fastening receiving portion formed so as to project from the inner side surface of the slat plate in which a mounting hole, which is a through-hole, is formed, through the mounting hole to the outer side surface of the sill plate. An inner surface holding portion that supports the inner surface of the dam plate fixed to the portion, and a female screw portion that is formed inside the inner surface holding portion and engages with the male screw of the formwork spacing holder. . The outer formwork fixture supports a fastened portion to be fastened to the fastening receiving portion from the outer surface of the slat plate, and an outer surface of the slat plate fixed to the fastened portion, together with the inner side surface clamping portion. An outer surface clamping portion for clamping the weir plate, an outer columnar barrel portion fixed to the fastened portion, a tool engagement portion with which a predetermined tool formed on the barrel portion is engaged, and the barrel And an end thick material support fixing portion having a structure for fixing a predetermined end thick material support that presses the end thick material provided in the portion from the outside toward the inside. Further, the holding of the siding plate by the inner surface holding portion and the outer surface holding portion is held in a holding fixed state in which a holding force is applied, and is held by loosening the holding force. The clamping receiving portion and the fastened portion cannot rotate with respect to each other about an axis perpendicular to the dam plate in the clamping and releasing state. It is formed so that it can be fastened. In this application, “inside” means the direction toward the inside of the siding plate, which is the side on which the concrete is placed, when attached to the siding plate, and “outside” means when attached to the siding plate. , Meaning the direction toward the outside of the board.

According to a second aspect of the present invention, in the mold fixture, each of the fastening receiving portion and the to-be-tightened coupling portion includes a first through hole and a second through hole that overlap and communicate with each other in a fastened state. The fastening receiving portion and the fastened portion are fastened to each other around an axis perpendicular to the baffle by a fastening material that penetrates and fixes the first through hole and the second through hole. To do.
According to a third aspect of the present invention, in the mold attachment according to the second aspect, the fastening material also serves as the outer surface holding portion.
According to a fourth aspect of the present invention, in the mold attachment according to the second or third aspect, the fastening material is formed by a wedge having an inclined surface on the outer side and / or the inner side.
The invention according to claim 5 is the mold fixture according to any one of claims 2 to 4, wherein the fastening material includes a main body bar material that penetrates the first through hole and the second through hole, A clip member that is fixed to the base end side of the main body bar and engages with the outer formwork fitting or a part of the inner formwork fitting by an elastic body.

According to a sixth aspect of the present invention, in the mold fixture according to the first aspect, one of the fastening receiving portion and the fastened portion is a protrusion having a cross-sectional shape that is not circular, and the other is By being the hole portion having the cross-sectional shape, the holes are fastened to each other around an axis perpendicular to the dam plate so as not to rotate.
The invention according to claim 7 is the holding device for projecting from the mounting hole of the slat plate to the outer surface side of the slat plate at the outer peripheral position of the fastening receiving portion of the inner frame fixture. A male nut is formed, and a union nut formed integrally with the outer surface holding portion is fixed to the body portion of the outer frame fixture, and is engaged with the outer surface holding portion. By fastening the male screw portion and the union nut, the pinned and fixed state is achieved, and by loosening the fastening of the pinching male screw portion and the union nut, the pinching and releasing state is achieved. .

  The invention described in claim 8 is a concrete formwork method using the formwork fixture, and includes a formwork assembly process, a concrete placing process, a holding release process, and a formwork removal process. In the mold assembly step, the male screw of the mold interval holder is engaged with the female screw part, and the fastening receiving part and the fastened part are fastened so as to sandwich the attachment hole, It is a step of assembling a concrete mold while sandwiching the siding plate by the sandwiching portion and the outer surface sandwiching portion and keeping the sandwiched state. The concrete placing process is a process in which concrete is placed in a concrete formwork after the formwork assembling process to form a concrete frame. The nipping / releasing step is a step of releasing the nipping force between the inner side nipping portion and the outer side nipping portion to the nipping / releasing state after the concrete placing step. In the mold removal step, after the nipping and releasing step, the predetermined tool is engaged with the tool engaging portion of the outer mold fixture, and the outer mold fixture and the outer mold fixture are engaged. In the step of removing the baffle together with the mold fixture by rotating the inner mold fixture in a direction in which the female screw portion of the inner mold fixture and the male screw of the mold interval holder are separated. is there.

  According to the first aspect of the present invention, the slab of the formwork is clamped and fixed by the outer formwork fixture to which the thick ends are attached and the inner formwork fixture to which the formwork spacing holder is attached, and the concrete is cast. In the formwork dismantling work after forming the concrete frame, after removing the end thick material and putting it in the nipping and releasing state, when a predetermined tool is engaged with the tool engaging portion and rotated in a predetermined direction, the outer side The formwork fixture and the inner formwork fixture, which is fastened to the formwork, rotate so that the female thread part of the inner formwork fixture rotates away from the male thread of the formwork spacing holder. As a result, the inner formwork fixture moves in the direction of peeling the formwork panel, and the formwork panel can be peeled off from the concrete frame together with the formwork fixture. That is, the work of disassembling the mold can be performed with fewer steps than before.

In the invention according to claim 2, since the inner mold fixture and the outer mold fixture are not separated by the fastening material, workability is improved when the inner mold fixture is rotated through the outer mold fixture. Good.
In the invention according to claim 3, since the fastening material also serves as the outer surface holding portion, it is possible to eliminate the necessity of separately providing the outer surface holding portion.
In the invention according to claim 4, the fastening material is formed by a wedge having an inclined surface on the outside and / or inside, so that the inner formwork fitting and the outer formwork fitting are formed according to the depth at which the fastening material is inserted. A force can be applied in the direction in which the angle approaches, and the pinching force can be increased.
According to the fifth aspect of the present invention, the fastening member can be stably fixed to the outer formwork fitting or the inner formwork fitting by providing the clip member on the fastening material. In addition, when the mold attachment is detached from the mold and stored or transported, the fastening material can be attached to the outer mold attachment or the inner mold attachment, which is highly convenient.

In the invention according to claim 6, the fastening receiving portion and the fastened portion are fastened to be non-rotatable by being engaged with each other by a projecting portion and a hole portion that are not circular in cross-section, The rotation work can be performed without using other members as in the case of using. Further, even after the outer formwork fixture is removed, if there is a tool that engages with the protrusion or hole on the fastening receiving portion side, the inner formwork fixture can be rotated to remove the formwork. .
According to the seventh aspect of the present invention, a union nut that engages with a holding male screw portion formed on the inner mold fitting is provided on the outer mold fitting, and this is integrated with the outer pinching portion. By being formed, the union nut is fixed to the outer formwork fixture at the time of fastening and releasing of the inner formwork fixture and the outer formwork fixture, so that workability is good.
According to the eighth aspect of the invention, when the outer formwork fixture is rotated during the work of disassembling the formwork, the formwork panel can be peeled off from the concrete case together with the formwork attachment, so that the work process is simplified. Can be.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a perspective view of a mold fixture X according to the first embodiment. The formwork fixture X includes an inner formwork fixture 10 and an outer formwork fixture 20. The inner formwork fixture 10 and the outer formwork fixture 20 each fix the support plate P by sandwiching the support plate P of the formwork panel from the inside and the outside.
The inner formwork fixture 10 includes a fastening receiving portion 11, an inner side surface holding portion 12, and a female screw portion 13. The fastening receiving portion 11 is a columnar body having a hexagonal cross section that protrudes from the inner surface of the mounting hole Pa provided in the dam plate P to the outer surface of the dam plate through the mounting hole Pa, and penetrates a set of opposing surfaces. A first through hole 11a is formed. The inner side surface holding portion 12 is formed in a truncated cone shape such that the inner side becomes smaller, and the end portion of the fastening receiving portion 11 is fixed to the center of the outer side surface. Further, the outer diameter of the outer side surface of the inner side surface holding portion 12 is formed larger than the attachment hole Sa of the dam plate P. The female screw portion 13 is formed by a female screw that engages with a male screw of the separator S that is provided at the center of the inner side surface of the inner side surface holding member 12 and serves as a mold interval holder.

The outer formwork fixture 20 includes a fastened part 21, a body part 22, a tool engaging part 23, and a thick end material support fixing part 24. The body portion 22 is cylindrical and forms the main body of the outer formwork fixture 20. The tool engaging portion 23 is a columnar body having a hexagonal cross section with which a box wrench and a spanner formed at the outer end portion of the body portion 22 are engaged. The thick end material support fixture fixing portion 24 is a structural part for fixing the thick end material support T to the trunk portion 22 for fixing the thick end material. An end thick material support fixing portion 24 is formed by a through-hole for driving the wedge Ta so as not to come out by being fitted to the outer periphery. In addition, what is necessary is just to divert the structure of the conventional general foam tie, and can employ | adopt various structures for the structure of an end thick material support fixing | fixed part.
The to-be-fastened part 21 is comprised from the hole in which the hexagonal column which the fastening receiving part 11 of the inner side mold attachment tool 10 formed in the inner side edge part of the trunk | drum 22 fits is settled. Further, on the surface of the body portion 22 that covers the outer periphery of the fastened portion 21, when the fastening receiving portion 11 is fitted to the fastened portion 21, the first overlapping hole 11 a of the fastening receiving portion 11 is overlapped with the first through hole 11 a. Two through holes 21a are formed. The fastening receiving portion 11 and the fastened portion 21 are inseparably fixed by inserting a wedge-shaped fastening material 21b having an inclination to the outside into the overlapped first through hole 11 and second through hole 21a. FIG. 2 is a partial vertical cross-sectional view showing a state in which the inner formwork fixture 10 and the outer formwork fixture 20 are fastened with the pricking plate P interposed therebetween and the fastening material 21b is inserted into the first through hole 11a and the second through hole 21a. The figure is shown. As shown in the figure, the positions of the first through hole 11a and the second through hole 21a are formed such that the inner edge portion of the fastening material 21b contacts the outer surface of the dam plate P. Since the fastening material 21b has a wedge shape, when the fastening material 21b enters deeply, the inner mold attachment 10 is pulled outward, and the outer surface of the inner side surface holding portion 12 of the inner mold attachment 10 and the inner edge of the fastening material 21b. A force is generated in a direction approaching each other, thereby holding the dam plate P. In other words, the fastening material 21b forms an outer surface holding portion for holding the outer surface of the slat plate P, and the clamping material 21b is driven to be fixed in a state where a clamping force is applied to the dam plate. It can be in a state, and by moving the fastening material 21b in the pulling direction, the pinching force can be relaxed and the pinching released state can be obtained. In the nipping and releasing state, the fastening receiving portion 11 and the fastened portion 21 are fitted with a convex portion and a concave portion having a non-circular cross section, so that they cannot rotate about an axis substantially perpendicular to the dam plate. It will be in the fastened state. Furthermore, when the fastening material 21b is not completely removed, the fastening receiving portion 11 and the fastened portion 21 are fastened together around the shaft substantially non-rotatably by the fastening material 21b.

Next, the formwork method using the formwork fixture X having the above configuration will be described. First, the inner formwork fixture 10 is fixed to the separator S by engaging the female thread portion 13 of the inner formwork fixture 10 in advance with the male screw of the separator S. In this state, the formwork panel is erected, and the fastening receiving portion 11 of the inner formwork fixture 10 is passed through the attachment hole Pa from the inside of the base plate P, and the outer formwork is attached to the fastening receiving portion 11 from the outside of the base plate P. Fastening portion 21 of fixture 20 is engaged, and fastening material 21b is driven into overlapping first through-hole 11a and second through-hole 21a to fix holding plate P to formwork fixture X while being held in a pinched state. To do. A concrete mold is assembled by performing such an operation on all the mounting holes Pa (mold assembly process). When the assembly of the concrete formwork is completed, the end thick material support T is inserted from the rear end side of the body portion 22 of the outer formwork attachment 20 to support the end thick material, and the wedge Ta is attached to the outer formwork attachment 20. It is driven into the end thick material support fixture 24 to fix the end thick material support T and the end thick material and reinforce the concrete formwork (form form reinforcement step). In this state, concrete is cast and cured on a concrete formwork to form a concrete frame (concrete casting process). When the concrete is hardened, the wedge Ta is removed to remove the thick ends. Then, the fastening material 21b is removed or loosened to obtain a nipping / releasing state (nipping / releasing step). In this state, a box wrench or the like is inserted into the tool engaging portion of the outside mold attachment 20 to attach the outside mold The tool 20 and the inner formwork fixture 10 fastened to the tool 20 are rotated. The direction of rotation is the direction in which the female thread portion 13 of the inner formwork fixture 10 and the male thread of the separator S are separated from each other. As a result, the slat plate P constituting the formwork panel is separated from the separator S. You will be away from the enclosure. It should be noted that it is possible to sew one mold fixture X from the separator S at a time, or whether the separator S is separated from the mold fixture X while moving the plurality of mold fixtures X little by little. It is appropriately selected according to the flexibility and the depth of the female screw portion 13. By such an operation, the siding plate and the formwork fixture X are removed from the concrete frame (formation removal process). Thereafter, the inner mold fixture 10 and the outer mold fixture 20 are removed from the removed mold, and the operation is completed.
In this way, in the formwork method using the formwork fixture X, the formwork mount and the formwork can be removed from the concrete frame at the same time, so that the number of work steps is reduced and the labor can be reduced.

(Embodiment 2)
FIG. 3 shows an exploded perspective view of the formwork fixture Y according to the second embodiment. The difference between the formwork fixture Y according to the second embodiment and the formwork fixture X according to the first embodiment is that the fastening receiver 11A side of the inner formwork fixture 10A is used as a hole and the outer formwork fixture 20A. This is a point in which the fastened portion 21A has a columnar shape. Since other points are the same as the mold fixture X according to the first embodiment, description thereof is omitted.
The fastening receiving portion 11A of the inner mold fixture 10A is a cylindrical body having an outer diameter that is fixed to the outer surface side of the inner surface holding portion 12 and that can be fitted with the mounting hole Pa of the bottom plate P, and has a cross section on the outer surface side. A hexagonal hole 11Aa is provided. The fastened portion 21A of the outer formwork fixture 20A has a hexagonal column shape having a shape that engages with the hole 11Aa of the fastening receiving portion 11A, and is provided on the inner side surface of the trunk portion 22. The fastening receiving portion 11A has a length that protrudes from the inner side surface of the dam plate P to the outer side surface, and the first through hole 11Ab at a position protruding from the outer side surface in the same manner as the mold fixture X according to the first embodiment. Corresponding to this, the second through-hole 21Aa that overlaps in the engaged portion 21A is also formed in the fastened portion 21A. 4A and 4B, the fastening receiving portion 11A of the inner mold fitting 10A and the fastened portion 21A of the outer mold fitting 20A are engaged with each other, and the fastening material 21b is connected to the first through-hole 11Ab, The partial expanded longitudinal cross-sectional view of the state struck and fastened in 2nd through-hole 21Aa is shown.
The method of using the mold attachment Y having the above-described configuration is the same as the method of using the mold attachment frame X according to the first embodiment. The mold attachment Y has an advantage that the mold can be easily assembled because the fastening receiving portion 11A of the inner mold attachment 10A is fitted into the attachment hole Pa of the dam plate P.

(Embodiment 3)
FIG. 5 shows an exploded perspective view of the mold fixture Z according to the third embodiment. The difference between the mold fixture Z according to the third embodiment and the mold fixture X according to the first embodiment is that the fastening receiving portion 11B of the inner mold fixture 10B is cylindrical, and the outer mold fixture 20B. The fastening portion 21B is a hole having a circular cross section, the outside mold holding portion 25 is separately provided on the outer mold attachment 20B, and the fastening material does not have a role as the outside surface clamping portion, the fastening material The clip member 21Bbb is provided on 21Bb. Since other points are the same as the mold fixture X according to the first embodiment, description thereof is omitted.

  The fastening receiving portion 11B of the inner formwork fixture 10B is the same as the fastening receiving portion 11 according to the first embodiment except that the cross-sectional shape is circular. The inner end portion of the body portion 22 of the outer formwork fitting 20B becomes thicker toward the tip side, and the end surface becomes a flange shape having an outer shape that does not pass through the attachment hole Pa of the dam plate P. The outer clamping part 25 which presses a P surface is formed. The fastening material 21Bb is bent from the wedge-shaped main body bar 21Bba and the base end of the main body bar 21Bba to the front end side, and further bent into an arc shape so as to engage with the outer periphery of the inner end of the body portion 22. It is comprised from clip member 21Bbb. The fastening material 21Bb is formed of a material having high elasticity such as spring steel, thereby giving a holding force to the clip member 21Bbb. 6, the fastening receiving portion 11B of the inner mold fitting 10B and the fastened portion 21B of the outer mold fitting 20B are engaged with the fastening plate P, and the fastening material 21Bb is connected to the first through-hole 11Ba, The partial expanded longitudinal cross-sectional view of the state struck and fastened in 2nd through-hole 21Ba is shown. FIG. 7 is a cross-sectional view taken along the line AA in FIG. As shown in the drawing, the fastening material 21Bb has a wedge shape, so that the inner formwork fixture 10B is pulled toward the bottom plate P side, whereby the inner side surface holding portion 12 and the outer side surface holding portion 10B. 25, the dam plate P is pinched and fixed. Further, as shown in FIG. 7, the fastening member 21 </ b> Bbb of the fastening material 21 </ b> Bb is engaged with the outer periphery of the inner end portion of the trunk portion 22, so that the fastening material 21 </ b> Bb is stably fixed without loosening. Further, depending on the position of the fastening material 21Bb, the pinched and fixed state and the pinched and released state are obtained. When the fastening material 21Bb is completely pulled out in the pinched and released state, the fastening receiving portion 11B and the fastened portion 21B are circular. Since the projections and recesses of the cross section are fitted, both can freely rotate about an axis substantially perpendicular to the dam plate P. However, if the fastening material 21Bb is left in the first through hole 11Ba and the second through hole 21Ba, the fastening receiving portion 11B and the fastened portion 21B are substantially perpendicular to the dam plate P by the fastening material 21Bb in the nipping and releasing state. It is possible to maintain a state where it is fastened so as not to rotate around a certain axis.

  The method of using the mold attachment Z having the above-described configuration is substantially the same as the method of using the mold attachment frame X according to the first embodiment. However, the fastening material 21Bb is not removed in the nipping and releasing step. It is made to leave in one through-hole 11Ba and 2nd through-hole 21Ba. At this time, the clip member 21Bbb can be stabilized by sandwiching the outer periphery of the inner end portion of the body portion 22 with a slightly bent lower end portion. When the outer formwork fitting 20B and the inner formwork fitting 10B are rotated by operating the formwork fitting Z without removing the fastening material 21Bb, the outer formwork fitting 20B and the inner formwork fitting Since it is not separated from 10B, workability is good, and at this time, the fastening material 21Bb does not directly hit the dam plate P, and therefore has an advantage that it can be easily rotated. Further, since the fastening material 21Bb can be engaged with the outer mold attachment 10B by the clip member 21Bbb, when the mold attachment Z is stored or transported, the fastening material 21Bb can be engaged with the outer mold attachment by the clip portion 21Bbb. If it is engaged and fixed to 10B, it is possible to suppress the situation where it is lost or searched during work.

(Embodiment 4)
FIG. 8 is an exploded perspective view of the mold fixture V according to the fourth embodiment. The formwork fixture V according to the fourth embodiment has a structure closest to the formwork fixture Y according to the second embodiment. The difference between the mold fixture V according to the fourth embodiment and the mold fixture Y according to the second embodiment is that a holding male screw 11Cc is formed on the outer periphery of the fastening receiving portion 11C of the inner mold fixture 10C. Instead of the first through hole, the second through hole and the fastening material, the outer mold fixture 20C is provided with a union nut 21Ce. Since other points are the same as the mold fixture Y according to the second embodiment, the description thereof is omitted.
The fastening receiving portion 11C of the inner mold fixture 10C is the same as the fastening receiving portion 11A according to the second embodiment except that a holding male screw portion 11Cc is formed at the outer peripheral outer end portion and there is no first through hole. It is. The union nut 21Ce is a union nut that engages with the holding male screw portion 11Cc formed in the fastening receiving portion 11C, and the opening on the outer end side is narrow. A flange 21Cd through which the narrowed opening of the union nut 21Ce cannot pass and the thread portion can pass is fixed to the inner end portion of the body portion 22. 9, the fastening receiving portion 11 </ b> C of the inner mold fitting 10 </ b> C and the fastened portion 21 </ b> C of the outer mold fitting 20 </ b> C are engaged, and the union nut 21 </ b> Ce is connected to the outer periphery of the fastening receiving portion 11 </ b> C. The partial expanded longitudinal cross-sectional view of the state engaged with the male screw part 11Cc for pinching of this is shown. As shown in the figure, the dam plate P is held between the union nut 21Ce and the inner surface holding portion 12, and the union nut 21Ce also serves as an outer surface holding portion.

The method for using the mold attachment V having the above-described configuration is substantially the same as the method for using the mold attachment frame X according to the first embodiment. Instead of driving the fastening material 21b into the two through-holes 21a to be in the pinching fixed state, the pinion fixing male portion 11Cc on the outer periphery of the fastening receiving portion 11C is engaged with the union nut 21Ce to be in the pinching fixing state. In the holding / release process, the union nut 21 </ b> Ce is loosened into the nipping / releasing state instead of the nipping / releasing state by removing or loosening the fastening material 21 b.
The mold attachment V is loosened in a state where the union nut 21Ce is engaged with the pinching male screw portion 11Cc in the nipping and releasing state, whereby the inner mold attachment 10C and the outer mold attachment 20C are separated. Therefore, workability at the time of rotating the outer formwork fixture 20B and the inner formwork fixture 10B is good.

It is a disassembled perspective view of the mold fixture which concerns on Embodiment 1. FIG. It is an enlarged longitudinal cross-sectional view which shows the fastening part of the inner side formwork fixture and outer side formwork fixture of the formwork fixture which concerns on Embodiment 1. FIG. It is a disassembled perspective view of the formwork fixture which concerns on Embodiment 2. FIG. It is an expanded longitudinal cross-sectional view which shows the fastening part of the inner side formwork fixture of the formwork fixture which concerns on Embodiment 2, and an outer side formwork fixture. It is a disassembled perspective view of the mold fixture which concerns on Embodiment 3. FIG. It is an expanded longitudinal cross-sectional view which shows the fastening part of the inner side formwork fixture of the formwork fixture which concerns on Embodiment 3, and an outer side formwork fixture. It is AA sectional drawing of FIG. It is a disassembled perspective view of the formwork fixture concerning Embodiment 4. It is an expanded longitudinal cross-sectional view which shows the fastening part of the inner side formwork fixture of the formwork fixture which concerns on Embodiment 4, and an outer side formwork fixture.

Explanation of symbols

X, Y, Z, V Formwork fitting P Pail plate Pa Mounting hole S Separator T
10, 10A, 10B, 10C Inner side surface formwork fittings 11, 11A, 11B, 11C Fastening receiving portions 11a, 11Ab, 11Ba First through hole 11Cc Nipping male screw portion 12 Inner side surface holding portion 13 Female screw portion 20, 20A, 20B, 20C Outer side surface mold fixture 21, 21A, 21B, 21C Fastened part 21a, 21Aa, 21Ba Second through hole 21b, 21Bb Fastening material 21Bba Main bar 21Bbb Clip part 21Ce Union nut 22 Body part 23 Tool Engagement part 24 End material fixing tool 25 Outer side surface clamping part

Claims (8)

A fastening receiving portion formed so as to project from the inner side surface of the dam plate on which the mounting hole, which is a penetrating hole, is formed to pass through the mounting hole to the outer side surface of the dam plate, and the cough fixed to the fastening receiving portion. An inner formwork fixture having an inner side face holding part for supporting the inner side face of the plate, and an internal thread part that is formed inside the inner side face holding part and engages with an external thread of the formwork spacing holder;
A fastened portion that is fastened to the fastening receiving portion from an outer surface of the strut plate, and an outer surface that supports the outer surface of the strut plate that is fixed to the fastened portion, and clamps the strut plate together with the inner surface sandwiching portion. A clamping part, a columnar body part extending outwardly fixed to the fastened part, a tool engaging part with which a predetermined tool formed on the body part is engaged, and an end piece provided on the body part A mold fixture having an outer mold fixture having a fastening fixture fixing portion having a structure for fixing a predetermined fastening fixture that presses down from the outside toward the inside,
The holding of the siding plate by the inner side holding part and the outer side holding part is a holding and fixing state in which the holding force is applied, and the holding force is released to release the holding. The clamping receiving portion and the fastened portion can be fastened to each other around an axis perpendicular to the baffle in the holding and releasing state. A formwork fixture. Each of the fastening receiving portion and the tightened coupling portion is formed with a first through hole and a second through hole that overlap and communicate with each other in a fastened state.
The fastening receiving portion and the fastened portion are fastened to each other around an axis perpendicular to the dam plate by a fastening material that penetrates and fixes the overlapped first through hole and second through hole. The formwork fixture according to claim 1.   The mold attachment according to claim 2, wherein the fastening material also serves as the outer holding portion.   The form fitting according to claim 2 or 3, wherein the fastening material is formed by a wedge having an inclined surface on the outside and / or inside.   The fastening material is related to a part of the inner fixture or the outer fixture by an elastic body, which is fixed to a main body bar that penetrates the first through hole and the second through hole, and a base end side of the main body bar. The formwork fixture according to any one of claims 2 to 4, comprising a clip member to be joined.   The fastening receiving portion and the fastened portion are protrusions having a non-circular cross-sectional shape, and the other is a hole having the cross-sectional shape, so that the shaft receiving member and the fastened portion are around a shaft perpendicular to the baffle plate. The mold attachment according to claim 1, which is fastened to each other so as not to rotate. At the outer peripheral position of the fastening receiving portion of the inner frame attachment tool, a holding male screw portion protruding from the attachment hole of the slat plate to the outer surface side of the slat plate is formed,
A union nut formed integrally with the outer surface holding portion is fixed to the body portion of the outer frame fitting, and is engaged with the holding male screw portion.
The clamping male screw part and the union nut are fastened to be in the pinching fixed state, and the fastening of the pinching male screw part to the union nut is to loosen the pinching and releasing state. The formwork fixture according to claim 1 or 6, which is a thing. A concrete formwork method using the formwork fixture according to any one of claims 1 to 7,
The male screw of the mold spacing holder is engaged with the female screw part, and the fastening receiving part and the fastened part are fastened so as to sandwich the mounting hole, and the inner side face holding part and the outer side face holding part are clamped. A formwork assembling step for assembling a concrete formwork while sandwiching and fixing the support plate with the part,
After the formwork assembling process, concrete is placed in a concrete formwork to form a concrete frame;
After the concrete placing step, the pinching / releasing step of loosening the pinching force to the baffle by the inner side pinching portion and the outer side pinching portion and setting the pinching / release state,
After the nipping and releasing step, the predetermined tool is engaged with the tool engaging portion of the outer formwork fitting, and the outer formwork fitting and the inner formwork fitting engaged therewith are provided. And a mold removing step in which the female plate portion of the inner formwork fixture and the male screw of the formwork spacing holder are rotated in a direction away from each other so that the slat plate is removed together with the formwork fixture. Formwork method.

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