JPH0768766B2 - Block for leveling concrete - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a level of concrete used when a concrete is poured onto a formwork to obtain a reinforced concrete disk for building a roof or floor of a building. It relates to the delivery block.

[Conventional technology]

Conventionally, as a leveling block as described above, for example, as shown in Japanese Patent Laid-Open No. 61-98867, an intermediate portion in the vertical direction is provided on a concrete formwork between the vertical and horizontal reinforcing bars of the reinforcing bar assembly. When a concrete board is obtained by pouring the concrete onto the formwork and placing it on the formwork at a proper interval by placing it on the concrete formwork by positioning it on the concrete formwork. There was one that was used to easily equalize the thickness of each part of the concrete that was embedded and poured with the three-dimensional structure.

In addition, as a leveling block as described above, the inventor of the present invention has disclosed a patent application No. 1-41700 (February 23, 1991).
Japanese application). This leveling block has a lower stand having a substantially inverted box-shaped lower rebar holding section and a block body fixed on the lower stand, and the lower rebar holding section holds the lower rebar. After assembling the block by fixing the block body to the top, installing these on the concrete formwork and using it almost in the same way as the conventional one described above, after obtaining the concrete board-like body and removing the formwork, It is proposed that the central part of the lower reinforcing bar in the reinforcing bar holding part be used for mounting a ceiling plate or the like.

[Problems to be Solved by the Invention]

The conventional leveling block for concrete is used only for equalizing the thickness of each part of the concrete poured onto the formwork when obtaining a concrete board.
In order to suspend a ceiling board or the like below the obtained concrete board, it is necessary to attach the base end part of a hanging tool such as a hanging bolt to the board separately from the leveling block. There was a problem that the workability was not good because the attachment of the hanging tool was troublesome. Further, the leveling block previously proposed by the inventor, after the concrete plate-shaped body is obtained, the center portion of the lower rebar that is held in the lower rebar holding portion of the lower table is substantially inverted box-shaped. Since it is only erected, it is difficult to connect a hanging tool such as a hanging bolt of the ceiling plate to the central portion of the lower rebar, and the workability does not improve so much compared to the conventional one described above. was there.

An object of the present invention is to solve the above-mentioned problems and to provide a concrete leveling block capable of reliably attaching a thread member such as a hanging tool with good workability.

[Means for Solving the Problems]

A concrete leveling block according to the present invention has a block member positioned and installed on a concrete formwork, and a female screw member to which a male screw member is tightened from below, and the block member for the lower surface of the block member is The distal end surface of the female screw member is positioned flat or upward, and the female screw member is fixed to the lower portion of the block member.

Further, the concrete leveling block according to the present invention has a block member positioned and installed on the concrete formwork, and a female screw member to which a male screw member is tightened from below, and the mold of the block member. The female screw member accommodated in the block member when installed on the frame is rotatably supported on the lower portion of the block member so as to be rotatable below the tip of the female screw member.

[Action]

In the concrete leveling block according to the present invention, the female screw member is fixed to the lower part of the block member while the block member is positioned and held on the concrete formwork. A rotatably supported shaft can also be used in the same manner as a leveling block without a female screw member because the tip of the female screw member does not project downward from the lower surface of the block member. Further, since the lower surface of the block member is supported on the formwork around the female screw member, the concrete poured into the formwork does not enter the inside of the female screw member, and the formwork is cured after the poured concrete is hardened. It is only necessary to remove it and screw the base end of the threaded member such as a suspender into the female threaded member from below, and tighten the male threaded member to the reinforced concrete board through the female threaded member easily and securely for a short time. It can be installed with.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1a, 1b, 2 and 3 show a first embodiment of the present invention. 1a is a perspective view of a block member, FIG. 1b is a perspective view of a fitting member with a female screw member, FIG. 2 is a plan view of the fitting member, and FIG. 3 is a sectional view taken along line AA of FIG. It is a figure.

In the figure, (1) is a block member, and this block member (1) is made of a molded product of synthetic resin such as polypropylene or polyethylene. (1a) is the six legs forming the block member (1), and the legs (1a)
Fitting recesses (1b) are formed at the lower ends of the respective.
(1c) is an annular upper end of the block member (1).
(20) is a main body composed of each of these components.

(2) is a fitting member, which is made of a molded product of synthetic resin such as polypropylene or polyethylene, like the block member (1). In this fitting member (2), six fitting projections (2a) corresponding to the fitting recess (1b) are provided on the annular base end portion (2b) so as to project to the block member (1). It is formed to fit freely. Reference numeral (2e) is a through hole for fixing the fitting member (2) to a plate frame (6) described later with a fixing tool such as a nail.

(3) is bent from the inner circumference (2c) of the annular base end (2b) of the fitting member (2) into a substantially inverted V shape, and has an opening (3) at the bottom.
It is a container having a). The container (3) is formed integrally with the fitting member (2), and the lower reinforcing bar (4) through hole (3d) is provided on both sides (3b) of the container (3).
(3e) is an accommodating portion for a female screw member described later. A female screw member (5) described later is housed in the housing portion (3e), and the female screw member (5) is pivotally supported in the housing portion (3e) by a lower rebar (4) so as to be rotatable downward. There is.

The female screw member (5) is composed of a die-cast product of a metal such as aluminum or an integrally molded product of a hard synthetic resin such as vinyl chloride. Further, the female screw member (5) is
As shown in FIGS. 4A, 4B, and 4C, a shaft hole (5a) is formed in the base end portion, and a female screw hole (5b) is provided in the lower portion thereof. Also,
If necessary, the female screw hole (5b) may be formed so that the base end is continuous with the shaft hole (5a). A guide hole (5c) is formed at the tip of the female screw hole (5b). That is, the female screw hole (5b) and the guide hole (5c) are formed in the widthwise central portion of the female screw member (5) along the longitudinal direction of the female screw member (5) orthogonal to the shaft hole (5a). Has been done. The guide hole (5c) is
A taper hole is formed in the front end surface of the female screw member (5) and has a small diameter from this opening toward the female screw hole (5b).

As shown in Fig. 1b, the lower rebar (4) has a central part (4
The shaft hole (5a) of the female screw member (5) is rotatably fitted in a) and penetrates the side portion (3b) of the fitting member (2) to form the side portion (3).
b) From the upper end of the standing portion (4b) that is bent at a right angle outside, both ends (4c) are bent at a right angle to the outside.

Next, the use of the level setting block of the first embodiment described above will be described.

As shown in FIG. 5, a large number of temporary columns (15) are erected,
A frame plate (6) of a temporary concrete form made of plywood or the like is fixed on these columns (15) by inclining vertically. After that, a large number of block members (1) and fitting members (2) are combined and supported on the frame plate (6) at required vertical and horizontal intervals, and an annular base end portion (2b) of the fitting member (2). The block member (1) and the fitting member (2) are fixed to the frame plate (6) by inserting a nail into the through hole (2e) previously provided in the frame and driving it into the frame plate (6).

Next, on the frame plate (6), the vertical and horizontal reinforcing bars (7a), (7b) are made orthogonal to each other, and these are arranged in a plurality of upper and lower stages to form a reinforcing bar assembly (7). In this case, the block member (1) and the fitting member (2) are held inside the vertical and horizontal bars (7a) and (7b). The bar arrangement (7a), (7b)
A part of the lower rebar (4) protruding from the block member (1) is fixed to a part of the above by suitable means such as welding. Further, in this state, the female screw member (5) is housed in the housing portion (3e) of the housing body (3), and the central portion of the lower reinforcing bar (4) is placed on the frame plate (6) in the roof slope direction. Place it orthogonal to. Then, by pouring concrete (8) onto the frame plate (6), the block member (1), the fitting member (2), the portion of the lower reinforcing bar (4) protruding outside the block member (1), and the reinforcing bar. The assembly (7) is embedded in the poured concrete (8), and the concrete is poured into a board shape. At this time, the concrete (8) is the block member (1)
Use the upper surface of the mark as a mark and make it equal to or slightly thinner than these heights. Although not shown, a temporary barrier plate is raised around the frame plate (6) to prevent the concrete (8) from flowing out of the frame plate (6).

The concrete (8) immediately after being cast on the frame plate (6) has fluidity, but the annular base end (2) of the fitting member (2) is
b) is fixed to the frame plate (6) and the body (1
Since the a) is supported by the reinforcing bars (7a) and (7b), the block member (1) is not displaced even when the concrete (8) is subjected to a load to flow down. And, since the block member (1) gives resistance to the flowing down of the concrete (8), it is useful for preventing the concrete (8) at the lower part of the slope from becoming thick.

After hardening of the concrete (8), the concrete formwork including the frame plate (6) and the columns (15) are removed. When the concrete formwork is removed, the female screw member (5) is rotated by gravity so that its tip portion is lowered, and becomes vertical as shown in FIG. After this state is reached, at a suitable time, the male screw member provided on the ceiling suspension bolt (9) from below is screwed into the female screw hole (5b) of the female screw member (5) and tightened, and the suspension is performed. The ceiling plate can be suspended from the lower end portion of the bolt (9) by an appropriate means to form the ceiling.
In addition, the roof can be roofed on the concrete (8) or the floorboard can be stretched at a suitable time after removing the concrete formwork.

In addition, in the first embodiment, the block member (1) is configured such that the main body (20) and the fitting member (2) are split fitting type, but both may be integrally formed. Is.
Further, even if the annular base end portion (2b) of the fitting member (2) has a shape in which the longitudinal portion of the lower reinforcing bar (4) is partially cut out, it does not adversely affect the operation and effect of the present invention. It can contribute to weight reduction. Further, the annular upper end (1c) can be formed in a flat disc shape.

FIG. 6 shows a second embodiment of the present invention. First in FIG.
The same reference numerals as those in FIGS. A and b indicate corresponding parts, and (10) is a cylindrical female screw member, and this female screw member (10) is orthogonal to the axial direction of the leg (1a) of the block member (1). Fitting member (2)
Embedded in the center portion of the female screw member and fixed integrally therewith, and the tip of the female screw member (10) is opened in the lower surface of the fitting member (2). The configuration of the second embodiment other than that described above is the first
It is almost the same as the embodiment.

Next, the use of the level setting block of the second embodiment will be described.

As shown in FIG. 7, a large number of temporary columns (15) are erected,
A frame plate (6) of a temporary concrete formwork made of plywood or the like is horizontally fixed on these columns (15). After that, a large number of block members (1) and fitting members (2) are fixed to the frame plate (6) in the same manner as in the first embodiment, and vertical and horizontal bar arrangements (7a),
(7b) are orthogonally crossed in upper and lower stages and fixed in the same manner as in the first embodiment, and the block member (1) and the fitting member (2) are vertically and horizontally arranged (7a) and (7b). Hold inside the box. Then, the concrete (8) is poured onto the frame plate (6), the block member (1) and the reinforcing bar assembly (7) are embedded in the poured concrete (8), and the concrete is poured into a board shape. At this time, the concrete (8) has a thickness equal to or slightly smaller than the height of the block member (1) with the upper surface as a mark. A temporary barrier plate is raised around the frame plate (6) to prevent the concrete (8) from flowing out of the frame plate (6).

After hardening of the concrete (8), the concrete formwork including the frame plate (6) and the columns (15) are removed. When the concrete formwork and the columns (15) are removed, the tip surface of the female screw member (10) is exposed on the lower surface of the concrete (8) together with the lower surface of the fitting member (2). After this state, at a suitable time, the male screw portion provided on the upper portion of the ceiling suspension bolt (9) from below is screwed into the female screw hole (10a) of the female screw member (10) and tightened. The ceiling plate can be configured by suspending the ceiling plate on the lower end portion of the bolt (9) by an appropriate means.

The female screw member (10) of the second embodiment has a female screw hole (10
Although a guide hole is not provided on the tip side of a), even in the leveling block in which the female screw member is fixed to the lower portion of the block member, a guide hole similar to the guide hole of the first embodiment is provided at the tip of the female screw hole. It is preferable to make it continuous.

In addition, although the lower reinforcing bar is not provided in the second embodiment, as a modification of the second embodiment, as shown in FIG. 8, a supporting portion (at the upper end of the leg portion (1a) of the block member (1) ( 11b) forming
Fixing the upper rebar (11), which penetrates through both ends (11a) and protrudes to the outside of the leg (1a), the leg (1a) of the upper rebar (11)
Both ends (11a) orthogonal to the axial direction are preferably supported by the upper bar arrangement of the reinforcing bar assembly and embedded in concrete.

Then, as shown in FIG. 9, as a modification of the first embodiment, as in the case of the upper rebar shown in FIG. 8, the upper rebar (11) is fixed to the upper end of the leg (1a) of the block member (1). Alternatively, in the leveling block shown in FIG. 9, the lower reinforcing bar (4) and the upper reinforcing bar (11) are arranged in a direction orthogonal to each other.

The level setting blocks shown in FIG. 8 and FIG.
The block member (1) is divided into upper and lower parts and upper bar (1
It is preferable that the female screw member (10) for fixing to 1) or the leg portion (1a) is integrally fixed to the upper member obtained by dividing the block member (1) by insert molding, and the divided member is fixed at a proper time.

FIG. 10 shows the upper part of the third embodiment of the present invention. In this embodiment, a recess (1f) having an open upper surface is formed at the center of the annular upper end (1c) of the block member (1), and a cylindrical upper female screw member (12) is formed at the center by insert molding. Recess (1
It is fixed together with f). The upper female screw member (1
2) has an open upper surface and the recess (1f)
It is housed inside. The configuration and use of the third embodiment other than those described above are the same as those of the first embodiment, and the male screw member (12a) of the upper female screw member (12) is provided with a male screw provided at the lower end portion of the suspension. The parts are screwed together, and the roof plate is locked by the upper end of the suspension so that the roof is roofed on the concrete board. By applying the one shown in FIG. 10 to the upper portion of the second embodiment, the upper female screw member may be tightened with a bolt, and the floor plate or the like may be stretched on the concrete board by the bolt. .

Furthermore, there are the following modifications of the first embodiment.

That is, in the female screw member (13) shown in FIGS. 11 (a), 11 (b), and 11 (c), the female screw portion is composed of a nut (13a), and this nut (13a) is welded to the central portion of the bracket (13b). A hole (13c), which is coaxial with the female threaded hole of the nut (13a) and has the same diameter as that of the nut (13a), is provided at the center, and the opposite ends of the bracket (13b) are bent at a right angle to the lower rebar (4). ) Is rotatably supported in the center. This female screw member (13) is welded with a guide member (13e) having a tapered hole (13d) on the side opposite to the nut (13a) at the center of the bracket (13b) as shown by the chain line. You may.

Further, as shown in FIGS. 12 a, b, and c, the female screw member (13) has a bracket (13 b) formed into a substantially angled shape, and a tubular portion (13 f) provided at the base end of the bracket (13 b). Is rotatably supported in the center of the lower rebar (4), and the bracket (13
Weld the nut (13a) to the tip of b) and
A hole (13c), which is coaxial with the female threaded hole of the nut (13a) and has substantially the same diameter, is provided at the tip of b). The female screw member (13) can also be welded to the guide member (13e) having the tapered hole (13d) on the side opposite to the nut (13a) at the tip of the bracket (13b). The female screw member (13) shown in each of FIGS. 11 and 12 is used by being attached to the lower portion of the block member similarly to the female screw member shown in FIGS.

As shown in FIGS. 13a and 13b, the proximal end of the female screw member (5) similar to that shown in FIGS. Is rotatably supported on the shaft (14), the U-shaped central portion (4a) of the lower rebar (4) is locked to the shaft (14), and both ends (4a) of the lower rebar (4) are attached to the lower wall ( 1d) and is projected to the outside of the leg (1a) above it.
Figures 14a, b and 15 are the same as Figures 13a, 13b except that the shape and position of the lower rebar (4) are different from those of Figures 13a, 13b.
It has the same structure as that shown in FIG.
3 The same symbols as those in Figures a and b indicate the corresponding parts.

The female screw member (5) shown in FIGS. 16 (a), 16 (b), and 16 (c) is a modification shown in FIGS. It is a circle. In addition, Fig. 16 a, b, c
The same reference numerals as those in FIGS. 4A, 4B, and 4C indicate corresponding parts.

The female screw member used in the first embodiment of the present invention is
If the block member is installed on the frame plate of the concrete formwork and is accommodated in the fitting member, even if the block member is in the fitting member after removal of the formwork, the tip portion is below the fitting member. You may project.

As illustrated in FIGS. 17, 18, and 19, the lower end portion of the fitting member (2) of the first embodiment, particularly the shape of the container (3), is suitable for accommodating the female screw member (5). Can be changed to
Further, as shown in FIG. 18 and FIG. 19, notches (5g) that open at the lower end of the female screw member (5) are formed, and the lower reinforcing bars (4) are press-fitted into these notches (5g) to be retained. You may do it. Incidentally, the same reference numerals as those in FIGS. 1A and 1B in FIGS. 17, 18, and 19 indicate corresponding parts.

The block member of the present invention is not limited to the shapes of the first and second embodiments, such as the circular cross section, and is the one described in the above-mentioned Japanese Patent Application No. 1-41700 previously proposed by the inventor. Almost similarly, it is divided into a lower base having an almost inverted box-shaped portion and a block main body in which a plurality of legs protrude below the outer periphery of the box-shaped portion, and the legs of the block main body are respectively placed on the lower base. It can be appropriately changed by, for example, supporting and fixing it so that the height at which the lower base and the block main body are fixed is approximately equal to the thickness of the concrete to be cast.

〔The invention's effect〕

As described above, the concrete leveling block according to the present invention has the block member positioned and installed on the concrete formwork, and the female screw member to which the male screw member is tightened from below. The screw member is fixed to the lower portion of the block member with its tip end surface flat or upward with respect to the lower surface of the block member, or is housed in the block member when the block member is installed on the mold. Since the screw member is rotatably supported on the lower portion of the block member so as to be capable of rotating downward of the tip portion of the female screw member, the following effects can be obtained.

That is, in the concrete leveling block according to the present invention, the female screw member is fixed to the lower part of the block member in a state in which the block member is positioned and held on the concrete formwork. The rotatably rotatably supported lower part of the block can also be used in the same manner as a leveling block without a female screw member because the tip of the female screw member does not project downward from the lower surface of the block member.

Further, since the lower surface of the block member is supported on the formwork around the female screw member, the concrete poured into the formwork does not enter the inside of the female screw member, and the formwork is cured after the poured concrete is hardened. It is only necessary to remove it and screw the base end of the male threaded member such as a hanger from below into the female threaded member to tighten it. It can be installed with. Therefore, the leveling block can also be used as an anchor such as a suspender for the ceiling plate, and the suspender or the like can be reliably attached with good workability.

[Brief description of drawings]

1a and 1b are perspective views of a block main body and a fitting member showing a concrete leveling block according to a first embodiment of the present invention, FIG. 2 is a plan view of the fitting member, and FIG. A-A sectional view, FIGS. 4 a, b, c are front views of the same female thread member,
FIG. 5 is a side view, a bottom view, FIG. 5 is a vertical sectional view of the upper portion of the building showing the usage state of the concrete leveling block according to the first embodiment of the present invention, and FIG. 6 is the concrete according to the second embodiment of the present invention. FIG. 7 is a schematic vertical sectional side view showing the leveling block of FIG. 7, FIG. 7 is a vertical sectional view of a part of the building showing the usage state of the leveling block of concrete according to the second embodiment of the present invention, FIG. 8 and FIG. 9 is a schematic vertical sectional side view showing a modification of the level adjusting block according to the first and second embodiments of the present invention, and FIG. 10 shows the upper portion of the level adjusting block according to the third embodiment of the present invention. Schematic side view showing, Fig. 11 a, b, c and Fig. 12 a, b, c
Are front views, side views and bottom views respectively showing different modifications of the female screw member used in the first embodiment of the present invention.
13a and 13b and 14a and 14b are longitudinal sectional views, transverse sectional views and FIG. 15 respectively showing the lower portions of different modifications of the leveling block according to the first embodiment of the present invention. FIG. 16 is a cross-sectional view showing a lower portion of a further modified example of the leveling block according to the first embodiment of the invention, and FIGS.
A front view, a side view, a bottom view, FIG. 17, FIG. 18 and FIG. 19 showing a modified example of the female screw member shown in FIGS. A, b and c are of a leveling block according to the first embodiment of the present invention. It is a vertical side view which each shows the lower part of the modification from which a block member differs from each other. (1) ... Block member, (1a) ... Leg, (1b) ... Fitting recess, (1c) ... Upper end, (2) ... Fitting member, (2a) ... Fitting projection, (2b) ... Base End, (2c) ... inner circumference, (3) ... container, (3a) ... opening, (3b) ... side, (3d) ... through hole,
(3e) ... accommodation section, (4) ... lower rebar, (4a) ... central section,
(4b) ... Standing part, (4c) ... Both ends, (5) ... Female screw member, (5a) ... Shaft hole, (5b) ... Female screw hole, (5c) ... Guide hole, (6) ... Concrete mold Frame plate of frame, (7) ... Reinforcing bar assembly, (7a), (7b) ... Vertical / horizontal bar arrangement, (8) ... Concrete, (9) ... Ceiling suspension bolt (hanging tool), (10) ... Female screw member , (10a)… Female screw hole, (11)… Upper bar, (11a)
... Both ends, (12) ... Upper female screw member, (12a) ... Female screw hole, (13) ... Female screw member, (13a) ... Nut, (13b) ...
Bracket, (13c) ... hole, (13d) ... tapered hole, (13
e) ... Guide member, (14) ... Shaft, (15) ... Temporary column, (2
0) ... The body of the block member.

Claims (6)

[Claims] 1. A block member positioned and installed on a concrete formwork, and a female screw member to which a male screw member is tightened from below, and a front end surface of the female screw member with respect to a lower surface of the block member. A leveling block for concrete, characterized in that the female screw member is fixed to the lower part of the block member by arranging the flat or above. 2. A block member that is positioned and installed on a concrete formwork, and a female screw member to which a male screw member is tightened from below, and the block is installed when the block member is installed on the formwork. A concrete leveling block, wherein the female screw member housed in the member is rotatably supported at a lower portion of the block member so that a tip end portion of the female screw member can be rotated downward. 3. The leveling block of concrete according to claim 1, wherein the block member is formed so that the main body and the fitting member can be fitted to each other. 4. The concrete leveling block according to claim 1, wherein the block member and the female screw member are integrally formed. 5. The block member has an upper female screw member fixed to an upper portion thereof, and a tip end surface of the upper female screw member is arranged flat or below the upper surface of the block member. The concrete leveling block described in). 6. A female screw member has a guide portion of a taper hole which is open at the front end surface and has a small diameter toward the base end side, and the female screw hole is continuous to the base end side of this guide portion. Term (1),
The concrete leveling block described in (2) or (5).