JP2005171637A - Form supporting implement and construction method for foundation recess - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a form supporting implement whose height can be adjusted and which makes workability of installation proper. <P>SOLUTION: This form supporting implement is equipped with: a screw body 6 with a seat plate, which is vertically arranged in the state of seating itself on an installation surface 2 of, for example, a foundation serving as a substrate for a concrete base 3; a supporting implement body 7 which is freely movable in a vertical direction in the state of being screwed into the screw body 6; and form supporting plates 8A and 8B which receive and support the form 5 in the state of being supported on an upper part of the implement body 7 in such a manner as not to be displaceable at least in the vertical direction. The supporting plates 8A and 8B are provided with frame-position regulating members 9A and 9B for positioning a lower part of the form 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a formwork support used when forming a recess in a concrete base of a building such as an apartment or a building, and a method for constructing a foundation recess.

For example, when a bathroom is provided in a building such as an apartment, a foundation recess having a slightly lower height is formed in the concrete base at the foundation construction stage, and the bottom of the bathtub is fitted into the foundation recess. Although not shown, such a foundation recess is formed by, for example, forming a framework by combining steel plates in accordance with the shape of the foundation recess to be formed, and placing concrete on the outside thereof. In addition, a method for placing residential foundation concrete in which a recess of a foundation structure is constructed using a mold has been proposed (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2003-064696 (see FIG. 5)

  However, in the conventional method for constructing the basic recess as described above, the steel plate used as the mold is heavy and difficult to handle, and the installation surface (concrete placement surface) has unevenness (inclination, unevenness, step, etc.). In addition, a raising member must be inserted under the steel plate to make the heights uniform, and the workability is not good, and it takes a lot of labor and time.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a formwork support that can be adjusted in height and has good workability in installation, and a method for constructing a foundation recess using the formwork support. And

(1) A formwork support according to the present invention is a formwork support that supports a formwork for forming a foundation recess in a concrete base so that its height can be adjusted.
A screw body with a seat plate that is seated on an installation surface of a foundation or the like serving as a foundation of the concrete base and is disposed in a vertical direction; a support main body that is screwed into the screw body and is movable up and down; A formwork support plate that is supported on the upper part of the support body so as not to be displaced in the vertical direction and supports the formwork, and a frame position restriction for positioning the lower part of the formwork provided on the formwork support plate. And a member.

  According to such a configuration, the height of the formwork support plate can be adjusted by rotating the support body, so that the formwork has a uniform height even if the installation surface is uneven. It is possible to form a framework with high dimensional accuracy with good workability. In addition, since the mold is positioned by the frame position regulating member, the shape accuracy of the frame can be stably maintained even when concrete is placed.

  A hole for allowing the screw body to pass therethrough is formed in the mold support plate, and the hole may be disposed at a location where the screw body does not interfere with the frame position regulating member. . If it does in this way, the range of height adjustment of a formwork support plate can be set up widely.

  Such a formwork support can be formed of a metal material, but if the support body and the formwork support plate are formed of a plastic material, the formwork support can be formed lightweight. Therefore, handling workability at the site is improved, and storage and transportation are facilitated. In addition, the support body and the formwork support plate can be manufactured at low cost by integral molding.

  Further, if the screw body, the support body, and the formwork support plate are made of a plastic material, the formwork support tool can be made even lighter, and the workability on site can be further improved. In addition, it is easy to store and transport. Further, the screw body can be manufactured at a low cost by molding, and the support body and the mold support plate can be integrally molded.

  Furthermore, a lock nut that engages with the screw body may be disposed below the support body to be fixed to the screw body. In this way, if the support body is fixed to the screw body when the height adjustment of the formwork support is completed, the support state of the formwork will be stabilized, and the formwork will be supported even when concrete is placed. The state will not change.

(2) The frame position restricting member may be formed in a substantially U shape in cross section in order to fit and hold the lower part of the mold. If it does in this way, insertion of a formwork becomes easy and a formwork can be supported in a stable state.

(3) The frame position regulating member may be formed in a bent shape in a perpendicular direction in plan view in order to fit and hold two molds at corner portions orthogonal to each other. If it does in this way, the support state of the formwork in a corner will be stabilized.

(4) A method for forming a basic recess according to the present invention includes a step of standing a plurality of mold support tools at predetermined positions on the installation surface, and a mold frame for each of the mold support tools. Holding the frame to form a frame, and placing the concrete on the outside of the framed frame, and the mold support is seated on the installation surface of the foundation and the like in the vertical direction. A screw body with a seat plate, a support body that is screwed into the screw body and is movable up and down, and is supported on an upper portion of the support body in a vertically displaceable manner; A mold support plate for receiving and supporting
A basic recess having a bottom surface formed at a height level below the mold frame and a wall surface formed along an outer surface of the mold frame is formed inside the mold frame.

  According to such a construction method, the formwork is received and supported by the formwork support to form a frame, and if concrete is placed from the outside, the side wall surface of the foundation recess is formed by the formwork, In addition, by replenishing and leveling concrete separately to the concrete that has flowed into the inside of the frame from the gap below the mold (between the mold support plate supporting the lower part of the mold and the base), It is possible to form the bottom surface of the basic recess having the same height as the formwork support plate.

(5) In such a method of constructing the basic recess, the height of the formwork support plate of each formwork support is provided before the step of forming the form by holding the formwork on each formwork support. You may set the process of adjusting. In this way, even if the ground is uneven, it is possible to uniformly adjust the height of the mold and form a highly accurate framework.

(6) You may form the said concrete base in the bottom part of the said foundation recessed part in the thickness corresponded to the height of the said formwork support plate. If it does in this way, a concrete base can be formed in desired thickness by adjusting the height of a formwork support plate.

(7) After forming the foundation recess, the formwork support may be embedded in the concrete base. In this way, the trouble of collecting the formwork support can be saved. In addition, the periphery of the foundation recess can be effectively reinforced with a formwork support.

  In such a method for forming a basic recess, the mold is preferably made of a wooden board. If it does in this way, handling workability of a formwork will become favorable and formation of a frame will become easy. The mold may be formed of a plastic plate. If it does in this way, handling workability of a formwork will become favorable and formation of a frame will become easy.

  Ribs for improving bending strength may be formed on the mold made of the plastic plate. If it does in this way, a deformation | transformation at the time of placing concrete can be decreased, and the shape precision of a foundation recessed part can be improved.

  The rib may be formed in the longitudinal direction of the mold. If it does in this way, the rigidity of a longitudinal direction can be improved effectively and the shape accuracy of a foundation crevice can be raised. Moreover, you may form the said rib in the cross shape in the longitudinal direction and the width direction of the said formwork. If it does in this way, the rigidity of a longitudinal direction and the width direction can be improved effectively, and the shape accuracy of a crevice can further be improved.

  Since the formwork support according to the present invention can adjust the height of the formwork support plate by rotating the support body, the formwork can be made uniform even if the installation surface is uneven. A frame with high dimensional accuracy can be formed with good workability by adjusting the height. In addition, since the mold is positioned by the frame position regulating member, the shape accuracy of the frame can be stably maintained even when concrete is placed.

  The method for forming the foundation recess according to the invention of the present method is as follows: the mold frame is supported by the mold support to form the frame, and if the concrete is cast from the outside, the side wall surface of the foundation recess is formed by the mold. In addition, concrete is replenished to the concrete that has flowed into the inside of the frame from the gap below the formwork (between the formwork support plate that supports the lower part of the formwork and the base). By doing so, it is possible to form the bottom surface of the basic recess having the same height as the mold support plate.

  Hereinafter, a method for constructing a formwork support and a foundation recess according to the preferred embodiment of the present invention will be described in detail with reference to the drawings.

  FIGS. 1 to 7 show, for example, formwork supports 1A and 1B formed of a metal material, and FIGS. 9 to 11 are explanatory diagrams of a construction state. As shown in these figures, the formwork supports 1A and 1B are fitted, for example, at the bottom of a bathtub (not shown) into a concrete base 3 placed on the foundation 2 or the like of the building at the stage of foundation work. The mold 5 for forming the foundation recess 4 can be supported in a height-adjustable manner, and even if the foundation 2 as the foundation of the concrete base 3 is uneven, the mold 5 ,... Can be adjusted uniformly to adjust the bottom surface 4b of the foundation recess 4 horizontally.

  The above-mentioned formwork support tools 1A and 1B are screwed onto the screw body 6 and a screw body 6 with a seat plate which is seated on the installation surface of the foundation 2 or the like which is the base of the concrete base 3 and is arranged in the vertical direction. A support body 7 that is fixedly supported on an upper portion of the support body 7 and supports and supports the mold 5. The mold support 8 Are provided with frame position regulating members 9A and 9B for positioning the lower part of the mold 5, and when the support body 7 is rotated in one direction, the mold support plates 8A and 8B are raised, When the main body 7 is rotated in the other direction, the formwork support plates 8A and 8B are configured to descend.

  More specifically, one mold support 1A is formed for a corner portion as shown in FIGS. 1 to 4, and the mold support plate 8A has two molds 5 orthogonal to each other. A frame position restricting member 9A for inserting and holding 5 is provided. The frame position restricting member 9A has a substantially U-shaped cross section (see FIG. 1) and is perpendicular to the plan view. It is formed in a bent shape in the direction (see FIG. 2).

  The frame position restricting member 9A is formed to a height that can be stably held without the mold 5 fitted and held falling down, and both open ends thereof are slightly outside so that the mold 5 can be easily inserted. It is formed in an open shape. With respect to such a frame position regulating member 9A, the tip of one of the molds 5 is pushed to the limit so as to abut against the inner wall of the frame position regulating member 9A, and the tip of the other mold 5 is placed on one of the molds 5 so as to be brought into contact with the side surface of the tip (see the two-dot chain line in FIG. 2).

  The mold support plate 8A is formed with a hole 8a for allowing the screw body 6 to pass therethrough, and the hole 8a is located where the screw body 6 does not interfere with the frame position restricting member 9A, that is, the frame position restricting member 9A. (See FIG. 2), the height adjustment width of the mold support plate 8A is expanded (see FIG. 3).

  As shown in FIGS. 5 to 7, the other mold support 1B is formed for a straight portion, and two molds 5 and 5 are linearly butted against each other on the mold support plate 8B. A frame position restricting member 9B for inserting and holding the frame is provided. The frame position restricting member 9B has a substantially U-shaped cross section (see FIG. 7), and both wall surfaces are straight in a plan view. (See FIG. 6).

  The frame position restricting member 9B is also formed to a height that allows the inserted and held mold 5 to be stably held without falling, and both open ends thereof are slightly opened so that the mold 5 can be easily inserted. It is formed in a shape. Further, the hole 8b for allowing the screw body 6 to pass therethrough is disposed at a position where the screw body 6 does not interfere with the frame position restricting member 9B, that is, at a position offset by a predetermined distance from the center line of the frame position restricting member 9B. As a result, the height adjustment width of the mold support plate 8B is expanded (see FIG. 7).

  Next, the common part of both mold support 1A, 1B will be described. At the bottom of the screw body 6, the mold support 1A, 1B can be erected in a stable state on the installation surface of the foundation 2 or the like. A seat plate 10 (see FIG. 4) is fixed. On the other hand, the support tool body 7 is made of, for example, a pipe material, and a lower portion thereof is narrowed to have a small diameter, and an inner screw 71 that is screwed into the screw body 6 is formed inside the lower portion. Form support plates 8A and 8B are fixed to the upper end by welding or caulking.

  Under the support body 7, a lock nut 11 that is screwed into the screw body 6 is disposed via a washer 12 in order to fix the support body 7 to the screw body 6. When the height adjustment of the molds 5,... Is completed, if the mold support plates 8 A and 8 B are fixed to the screw body 6 by the lock nut 11, the support state of the molds 5. When the concrete is placed, the support state of the molds 5, ... does not change.

  A method for forming the foundation recess 4 in the concrete base 3 using the mold support 1A, 1B configured as described above (see FIGS. 9 to 11) will be described. A first step of erecting the mold support 1A, 1B at an appropriate interval, for example, an interval corresponding to the width of the mold 5 at a position where the side wall surface of the basic recess 4 to be formed is formed, A second step of adjusting the height of the mold support plates 8A and 8B of the respective mold support tools 1A and 1B, and a third step of fixing the mold support plates 8A and 8B to the screw body 6 by the lock nut 11 (See FIG. 9 (a)), the fourth step (see FIG. 9 (b)) of forming the framework by holding the molds 5,. The fifth step (see FIG. 10 (a)) for placing concrete on the outside of the formed molds 5,. ) And concrete inside the framed molds 5,... So that the bottom surface is flush with the height level of the lower part of the molds 5,... (Mold support plates 8A, 8B). And the sixth step (see FIG. 10B) and the seventh step (see FIG. 11) for removing the molds 5,.

  In this example, both ends of the mold 5 to be used are supported by the mold supports 1A and 1B. Therefore, in the first step, three in the longitudinal direction of the illustrated basic recess 4 and 2 in the width direction perpendicular to the paper surface. Formwork supports 1A and 1B are arranged at the respective locations (four formwork support tools 1A and two formwork support tools 1B, a total of six). Next, since there is unevenness (a step) 2a on the installation surface 2 of the foundation or the like on which the foundation recess 4 is to be formed, it is necessary to support all the molds 5,... At the same height level. The height level of the mold support plates 8A and 8B of each mold support 1A and 1B is adjusted to be uniform by stretching (not shown) or the like (second step).

  At that time, the height of the formwork support plates 8A and 8B is adjusted in accordance with the depth (H1, H2) of the concrete base formed on the base 2. The adjustment is performed by rotating the support body 7 as described above. Then, after the height adjustment is completed, the mold support plates 8A and 8B are fixed to the screw body 6 by fastening the lock nut 11 (third step).

  Next, in the fourth step, the frame is formed by holding the molds 5,... On the fixed mold support plates 8A, 8B, respectively. At this time, the upper joints of the respective molds 5,... Are joined by using separately prepared upper joints 13A and 13B (for example, see FIGS. 8A to 8D). In this state, the frame of the molds 5,... Is fixed. For the upper joints 13A and 13B, those formed in the same shape as the frame position regulating members 9A and 9B can be used.

  In the next fifth step, concrete is placed on the outer periphery of the framed molds 5,... To form the side wall surface (wall surface of the present invention) 4a of the foundation recess 4 on the outer surface of the molds 5,. can do. At that time, the concrete flows into the inside of the frame from the gap below the molds 5,... (Between the mold support plates 8A, 8B and the installation surface 2), but it does not spread sufficiently (FIG. 10 (a)). (Refer) Separately, by replenishing concrete and leveling with a trowel or the like (not shown), the bottom surface 4b having the same height level as the mold support plates 8A and 8B can be formed (sixth process, FIG. 10 (b)).

  Next, when the concrete is hardened after a predetermined time has elapsed, the upper joints 13A and 13B are removed, and the molds 5 are removed to complete the construction (seventh step). The main parts of the mold support 1A, 1B embedded in the concrete base 3 are left as they are, and the frame position regulating members 9A, 9B exposed in the foundation recess 4 and a part of the screw body 6 are cut by the cutter. Cut off with gas or gas.

  As described above, in this construction method, even if there is some unevenness on the installation surface 2 as a base, a highly accurate framework is formed by adjusting the height of the molds 5, ... uniformly. Therefore, the basic recess 4 with high shape accuracy can be formed with good workability. In particular, by adjusting the height of the mold support plates 8A and 8B, the concrete base 3 below the bathtub B can be accurately formed to a desired thickness as shown in FIG.

  Moreover, the effort which collect | recovers them can be saved by making the main part of the formwork support tools 1A and 1B remain embedded in the concrete base 3. Moreover, the circumference | surroundings of the basic | foundation recessed part 4 can also be effectively reinforced with formwork support tools 1A and 1B, and the bottom part of the bathtub B which becomes heavy when water is poured can be supported firmly.

  Furthermore, in such a construction method, if the formwork 5 made of wood is used, it is lightweight and inexpensive, handling workability is improved, and the formation of the framework is facilitated. Similarly, the plastic can be light and inexpensive, can be handled easily, and can easily form a frame.

  When the mold 5 is formed of a plastic plate, for example, as shown in FIGS. 12A to 12C, it is preferable to form ribs 5a for improving the bending strength. The rib 5a may be formed so as to intersect the longitudinal direction and the width direction of the mold 5. If it does in this way, the rigidity of a longitudinal direction and the width direction can be improved effectively, the deformation at the time of placing concrete can be reduced, and the foundation concave part 4 with high shape accuracy can be formed. it can.

  Moreover, you may form the support tool main body 7 and the formwork support plates 8A and 8B with a plastic material. In this way, since the formwork supports 1A and 1B can be formed in a light weight, handling workability at the site is improved, and storage and transportation thereof are facilitated. In addition, the support body 7 and the formwork support plates 8A and 8B can be manufactured at low cost by integral molding.

  Furthermore, you may form the screw body 6, the support tool main body 7, and the formwork support plates 8A and 8B with a plastic material. In this way, the formwork supports 1A and 1B can be formed to be even lighter, so that the handling workability at the site is further improved, and the storage and transportation are facilitated.

  Further, the screw body 6 can be formed at a low cost by molding, and the support body 7 and the mold support plates 8A and 8B can be integrally formed at a low cost, thereby providing the mold support 1A and 1B at a lower cost. be able to. The formwork supports 1A and 1B of the present invention are not limited to the configuration described in the present embodiment, and may be improved, modified, etc., as necessary, without departing from the gist of the present invention. It goes without saying that is free. Moreover, the foundation recessed part constructed by the invention of the present method can be applied not only for fitting the bottom of the bathtub B, but also, for example, when constructing Japan between apartments, etc. The method of constructing the foundation recess can be widely applied regardless of the purpose when the recess is formed in the concrete base.

It is a front view of the formwork support for corners concerning an embodiment of the invention. It is the same top view. It is AA arrow sectional drawing of the same FIG. It is the bottom view. It is a front view of the formwork support for the straight part. It is the same top view. It is BB arrow sectional drawing of the same FIG. (A) is a top view of the upper joint for the corner, (b) is the front view, (c) is a plan view of the upper joint for the straight portion, and (d) is the front view. (A) is an explanatory view of a state in which the formwork support is erected on the same installation surface and the height is adjusted, and (b) is a state in which a frame is formed with the same formwork. (A) is explanatory drawing of the state which casts the concrete, (b) is the state which leveled the bottom face of the basic | foundation recessed part. It is explanatory drawing of the state which formed the basic | foundation recessed part. (A) The top view seen from the inside of the formwork formed with the plastic material, (b) CC sectional view taken on the line (a), (c) Cross sectional view taken on the line DD of (a) is there.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1A, 1B ... Formwork support tool, 2 ... Installation surface, 3 ... Concrete base, 4 ... Foundation recessed part, 4a ... Wall surface, 4b ... Bottom surface, 5 ... Formwork, 6 ... Screw body, 7 ... Support tool main body, 8A, 8B: Formwork support plate, 9A, 9B: Frame position regulating member, H1, H2: Height of formwork support plate

Claims (7)

A formwork support for supporting a formwork for forming a foundation recess in a concrete base, the height of which can be adjusted,
A screw body with a seat plate that is seated on an installation surface such as a foundation serving as a foundation of the concrete base and arranged in a vertical direction;
A support body that can be moved up and down by screwing into the screw body;
On the upper part of the support body, a mold support plate that is supported so as not to be displaced in the vertical direction and supports the mold,
And a frame position regulating member provided on the mold support plate for positioning a lower portion of the mold frame.   2. The formwork support according to claim 1, wherein the frame position restricting member has a substantially U-shaped cross section so as to fit and hold a lower part of the formwork.   The frame position regulating member is formed in a bent shape in a right angle direction in a plan view so as to fit and hold two molds at corner portions orthogonal to each other. The formwork support described. Erecting a plurality of formwork support tools at predetermined positions on the installation surface;
Forming a frame by holding a mold in each of the mold supports; and
Placing concrete on the outside of the framed formwork, and
The formwork support includes: a screw body with a seat plate that is seated on an installation surface such as a foundation and disposed in a vertical direction; a support body that is screwed into the screw body and is movable up and down; On the upper part of the support body, a mold support plate that is supported so as not to be displaced in the vertical direction and receives and supports the mold, and
A base recess having a bottom surface formed at a lower height level of the mold and a wall surface formed along an outer surface of the mold is formed inside the mold. Construction method.   A step of adjusting the height of the formwork support plate of each formwork support is provided before the step of forming the form by holding the formwork on each of the formwork supports. Item 5. A method for constructing a basic recess according to Item 4.   The construction method for a foundation recess according to claim 4 or 5, wherein the concrete base at the bottom of the foundation recess is formed to a thickness corresponding to the height of the formwork support plate.   The method for constructing a foundation recess according to any one of claims 4 to 6, wherein, after the foundation recess is formed, the formwork support is left embedded in the concrete base. .