JPH0768767B2 - Concrete leveling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used in the case of constructing a reinforced concrete disk-like body by pouring concrete onto a concrete formwork in order to build a roof or floor of a building. The present invention relates to a leveling device for concrete.

[Conventional technology]

As an apparatus for leveling concrete as described above, the inventor of the present invention is Japanese Patent Application No. 1-59548 (March 1, 1991).
4th application) is proposed first. This leveling device is composed of a synthetic resin molded product consisting of a lower stand with an approximately inverted box-shaped lower rebar holding section and a block body with a plurality of legs protruding below the outer periphery of the upper rebar holding section. A plurality of leveling blocks, and the lower pedestals of these blocks are fixed on the concrete formwork with the lower rebars embedded in the concrete held in the lower rebar holders with vertical and horizontal intervals. While supporting and fixing the leg portions of the block body on the lower table, the upper reinforcing bar holding section holds the upper reinforcing bars embedded in the concrete, and the height at which the lower table and the block main body are fixed is the concrete mold. The thickness of the concrete is almost the same as that of the concrete placed on the frame.

The leveling device described above, after constructing a concrete formwork, assembles it on the concrete formwork together with a reinforcing bar assembly arranged vertically, horizontally and above and below the formwork, and forms the formwork. By pouring concrete up to almost the same height as the block bodies, the thickness of the concrete can be easily made uniform in each part with the upper surfaces of these bodies as marks.

It is also proposed to use the lower rebars held by the lower rebar holding portion of the lower table after mounting the concrete for mounting the ceiling plate or the like.

[Problems to be Solved by the Invention]

However, in the concrete leveling device described above, after pouring the concrete, the center part of the lower reinforcing bar held by the lower reinforcing bar holding part of the lower table is only erected in the lower reinforcing bar holding part. Therefore, it is difficult to attach a suspending tool such as a ceiling suspension bolt to the central portion of the lower rebar, and in particular, when the cast board-like concrete has a roof slope, the suspending tool should be vertical. Since it is necessary, there is a problem that it is more difficult to attach the hanging device.

The present invention solves the above-mentioned problems and makes it possible to add a small number of parts to the structure without making the structure complicated, not only in the case of a horizontal concrete board, but also in the case of an inclined concrete board. An object of the present invention is to provide a concrete leveling device to which a thread member such as a suspender can be attached with good workability.

[Means for Solving the Problems]

A concrete leveling device according to the present invention includes a lower base having a lower rebar holding portion substantially in the shape of an inverted box, a block main body having a plurality of legs protruding below the outer periphery of an upper portion, and a large number of female screw members. Equipped with a leveling block of
A central portion of the lower rebar is erected on the lower rebar holding portion of the lower table, and a base end portion of the female screw member is rotatably supported by the central portion, and the female screw member is housed in the lower rebar holding portion. Then, the both ends of the lower rebar are projected outside the lower rebar holding portion so that they can be embedded in the concrete that is placed on the concrete formwork, and the lower stand is vertically and horizontally spaced from each other on the concrete formwork. It is fixed, and while supporting and fixing the legs of the block main body on the lower base, the height at which the lower base and the block main body are fixed is made substantially equal to the thickness of concrete to be cast on the concrete formwork. Is.

[Action]

The leveling device for concrete according to the present invention, when installing the lower stand of the leveling block on the concrete formwork, rotatably has a base end portion at the center of the lower rebar installed on the lower rebar holding portion of the lower stand. Since the screw member for supporting the shaft is housed in the lower rebar holding portion, a large number of leveling blocks are used, and after concrete is cast and hardened on the concrete formwork, the concrete plate-shaped body is used to When the form is removed, the female screw member rotates about the center of the lower rebar due to gravity, and the female screw member and the female screw hole can be in a vertical state even if the concrete board has a gradient. Therefore, a male screw member such as a ceiling hanging bolt can be easily screwed into the female screw hole, and the male screw member can be easily held vertically.

〔Example〕

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

FIGS. 1 to 4 show leveling blocks. In these figures, (1) is a lower stand, (2) is a block body, and (3) is a lid, which are synthetic materials such as polypropylene and polyethylene. It is composed of an integrally molded product of resin.

The lower base (1) is shown in FIGS. 1, 2 and 4 to 7.
As shown in the figure, a lower reinforcing bar holding portion (4) is formed in a central portion in a substantially inverted box shape, and a pair of notches (4b) opening to the lower surface are formed in the central portion of a long side wall (4a) of the holding portion (4). ) Are formed to face each other. From the side wall of the lower reinforcing bar holding part (4) to the outer peripheral side,
Six supporting portions (5) centering on the center of the lower reinforcing bar holding portion (4) are radially projected at equal angular intervals, and the supporting portion (5)
Fitting portions (6) are provided at the respective tips of the. The fitting portions (6) are connected in threes by connecting portions (7) in an arc shape centered on the center of the lower reinforcing bar holding portion (4), and the connecting portions (7) are located at positions corresponding to the notches (4b). It is divided into two by the interval arranged at. The fitting portion (6) is formed with a fitting convex portion (6b) protruding upward through the step (6a).

In FIG. 5, the arrows (4d) and (4d) shown in the vertical direction of the lower rebar holding portion (4) and the triangular arrows (7a) and (4a) shown in the vertical direction of the connecting portion (7). 7a) is a mark for indicating the vertical and horizontal allocation criteria.

As shown in FIGS. 1 to 3, 8 to 10 and 8a, the block body (2) has an upper rebar holding portion (8) formed in a substantially box-like shape in the central portion thereof. A pair of notches (8b) opening on the upper surface are formed facing each other at the center of the short side wall (8a) of the holding portion (8). An arcuate connecting portion (10) centered on the center of the upper reinforcing bar holding portion (8) is provided on the outer peripheral side of the side wall of the upper reinforcing bar holding portion (8) via a support portion (9). The connecting portion (10) is divided into two parts by an interval arranged at a position corresponding to the notch (8b), and has an outer diameter equal to the outer diameter of the connecting portion (7) of the lower table (1). There is. Further, the connecting portion (10) has a structure shown in FIG.
A pair of mating grooves (10
a) is formed in T shape, and these fitting grooves (10
The a) is arranged at a position facing the central portion of the long side wall (8c) of the upper reinforcing bar holding portion (8) so as to be orthogonal to the notch (8b). Six legs (11) extending from the connecting portion (10) of the main body (2) to the fitting portion (6) of the lower base (1) at equal intervals in the circumferential direction are equal in length to each other. Is projected. A fitting recess (11b) is formed upward from the lower end (11a) of the leg (11) that comes into contact with the step (6a) of the fitting part (6),
The fitting concave portion (11b) and the fitting convex portion (6b) of the fitting portion (6) are fitted to each other so that the main body (2) is fixed on the step (6a) of the lower table (1). Has been done.

As shown in FIGS. 1 to 3, the lid body (3) is provided with an upper reinforcing bar on the lower surface of a flat rectangular cover plate (3a) covering the upper opening of the upper reinforcing bar holding portion (8) of the main body (2). A fitting frame (3b) that fits on the inner circumference of the side wall of the holding portion (8) is formed. Incidentally, the lid body (3) is destroyed by being hit from above while being attached to the upper reinforcing bar holding portion (8).

Figures 11a and 11b show the lower rebar. In the lower rebar (12), the hanging parts (12b) are bent from both ends of the central part (12a), and the lower reinforcing bars (12) are extended from the lower ends of the hanging parts (12b) in parallel with the central part (12a) via the upward inclined parts (12d). Both ends (12
c) is bent.

FIG. 12 shows a female screw member. The female screw member (26) is made 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, and has a shaft hole (at the base end portion) orthogonal to the axial direction of the female screw member (26). 26a) is provided, and a trumpet-shaped guide portion (26b) having an opening at the tip end surface.
A screw hole (26d) is formed on the base side to connect the female screw member (26c) along the axial direction. That is, the shape is such that a tapered surface having a small diameter is provided from the tip toward the female screw hole (26d).

As shown in FIGS. 13 (a) and 13 (b), the female screw member (26) is rotatably supported by the central portion (12a) of the lower rebar (12), and is attached to the lower base (1). The lower reinforcing bar (12) is accommodated in the lower reinforcing bar holding part (4), and the lower reinforcing bar (12) has a notch (4b) in the lower reinforcing bar holding part (4) at the boundary between the hanging part (12b) and the upward inclined part (12d).
Are engaged and supported respectively.

14 a, b, 15 a, b and 16 a, b show different upper reinforcing bars, respectively. Upper rebar (1
In 3), the downward portions (13b) are bent from opposite ends of the central portion (13a) in opposite directions to hang down, and the downward portions (13b)
Both ends (13c) shorter than this are bent in parallel to the central part (13a) from the lower end of the. The upper reinforcing bar (13) shown in FIGS. 15 (a) and 15 (b) has downward portions (13b) of different lengths hung from both ends of the central portion (13a).
6 The upper rebar (13) shown in Figures a and b has a downward facing portion (13) that is inclined so that the lower ends of both ends of the central portion (13a) come close to each other.
b) is bent. In addition, in Fig. 15 a, b,
16 Shapes of the upper rebar (13) shown in Fig.
It is similar to that shown in FIG. 14 a, b, and FIG. 15 a, b,
The same symbols as those in FIGS. 14A and 14B in FIGS. 16A and 16B indicate corresponding portions.

FIG. 17 shows a connecting rod, the connecting rod (14) is made of hard plastic or metal and has a T-shaped cross section, and the web portion (14a) has a width of the fitting groove (10a) of the block body (2). Is press-fitted into a narrow portion of the block, and the upper surface of the flange portion (14b) is fitted into the wide portion of the fitting groove (10a) of the block body (2) to be flat with the upper surface of the connecting portion (10). , Cut to length.

Next, a concrete leveling device using the leveling block described above and its use will be described.

As shown in Fig. 20, a large number of temporary columns (19) are erected,
A frame plate (15) of a temporary concrete form made of plywood or the like is fixed on these columns (19) by inclining in the vertical direction. After that, the central portion (12a) of the lower reinforcing bar (12) is press-fitted into the notch (4b) provided in the long side wall (4a) of the lower reinforcing bar holding portion (4) of the lower table (1), and the lower reinforcing bar ( 12) hanging part (12
The boundary between b) and the upward slope (12d) is held by the lower base (1) so as not to move in the longitudinal direction, and the upward slope (12d) and both ends (12c) of the lower rebar (12) are lowered. The screw part is projected outside the reinforcing bar holding part (4) and arranged at the interval of the connecting part (7) (see FIGS. 2 and 4), and is axially supported by the central part (12a) of the lower reinforcing bar (12). (26) is housed in the lower reinforcing bar holding portion (4) such that the tip portion thereof can project downward (13th
(See Figures a and b). In this state, connect the connecting portion (7) to the frame plate (1
5) Support it on the top and fix it to the frame plate (15) by nailing. Next, as shown in FIG. 20 and FIG. 21, the vertical and horizontal reinforcing bars (16a) and (16b) are made orthogonal to each other, and these are arranged in a plurality of upper and lower stages to form a reinforcing bar assembly (16). It is constructed on the frame plate (15).
In this case, the lower stand (1) has a large number of vertical and horizontal bars (16
They are arranged in series in the vertical and horizontal directions at a predetermined mutual interval in the interior surrounded by a) and (16b). Furthermore, a fitting recess (11) provided on the leg (11) of the block body (2) from above.
b) The fitting convex part (6) provided on the fitting part (6) of the lower table (1).
The lower end (11a) of the leg portion (11) is supported on the step (6a) of the fitting portion (6) so that the main body (2) is placed on the lower table (1). Fix it. And Fig. 14
The central portion (13a) of the upper reinforcing bar (13) shown in a and b is press-fitted into the notches (8b) provided on both side walls (8a) of the upper reinforcing bar holding portion (8) of the main body (2). , Upper rebar (13) body (2)
The upper rebar (13) downwards (13
b) and both ends (13c) are projected to the outside of the upper reinforcing bar holding part (8) and arranged in the space of the connecting part (10) (Figs. 2 and 3).
As a result, the leveling block (17) is assembled on the form (15). In this case, the central portion (12a) of the lower rebar (12) is orthogonal to the direction of the roof slope, and the central portion (13) of the upper rebar (13) is located directly above the central portion (12a).
a) are arranged in parallel, and all the leveling blocks (17) are arranged such that the central parts (12a) and (13a) of the lower and upper reinforcing bars (12) and (13) are parallel to the horizontal bar (16b). Turn to Then, both ends (12c) and (13c) of the lower and upper reinforcing bars (12) and (13) are supported above and below any of the vertical reinforcing bars (16a), and these reinforcing bars (16a) are positioned. However, both ends (12) of the bar arrangement (16a) and the lower and upper reinforcing bars (12) and (13)
You may fix c) and (13c) by an appropriate means. Then, as shown in FIG. 21, both ends of the connecting rod (14) are pushed into the fitting groove (10a) provided in the connecting portion (10) of the block main body (2) vertically adjacent to each other from above. The upper surface of the connecting rod (14) and the upper surface of the connecting portion (10), that is, the upper surface of the main body (2) are made flat, and all the main bodies (2) are vertically connected by the connecting rod (14). In addition, Fig. 18 and Fig.
As shown in FIG. 19, from the top, the fitting frame (3b) of the lid (3)
Is fitted to the side surface of the upper reinforcing bar holding part (8) of the main body (2), the upper plate opening of the upper reinforcing bar holding part (8) is covered with the cover plate (3a) of the lid body (3), and the assembly of the leveling block is completed. To do. In this case, it is preferable that the upper surfaces of the cover plate (3a) and the main body (2) are located on the same plane.

It should be noted that in FIGS. 20 and 21, the upper reinforcing bar (1
3) was used, but the rebar assembly (1
Depending on the configuration of 6), the upper reinforcing bar (13) shown in Fig. 15 a, b or Fig. 16 a, b is used. Alternatively, the upper reinforcing bar (13) may be fitted in the upper reinforcing bar holding portion (8) in advance and then the block body (2) may be fitted in the lower stand (1). Furthermore, when there is a slight error in the positions of the reinforcing bars (16a) and (16b) of the reinforcing bar assembly (16), when the legs (11) of the block body (2) interfere with the reinforcing bars, As long as the number of interfering legs (11) is a small number such as one or two, they may be bent slightly or cut by an appropriate means, and the position of the block body (2) with respect to the lower table (1) may be set to these positions. Rotate around the axis of, that is, lower rebar (1
The upper rebar (13) may be angled with respect to 2) so as not to be parallel but to cross over, so as to avoid interference with the legs (11).

After assembling the leveling device on the frame plate (15) of the concrete formwork as described above, the concrete (18) is poured onto the frame plate (15), thereby lowering the base (1) of the block (17). ) And the main body (2), and the lower and upper rebars (1) held by the lower and upper rebar holding portions (4) and (8).
2) The parts of (13) protruding from the holding parts (4), (8), the parts other than the upper surface of the connecting rod (14), and the rebar assembly (16) are embedded in the poured concrete (18). Pour concrete into a board. In this case, the concrete (18) has a thickness equal to or slightly smaller than the height of the blocks (17) with the upper surface of the block (17) as a mark. Although not shown, a temporary barrier plate is set up around the frame plate (15) to prevent the concrete (18) from flowing out of the frame plate (15). Further, when the concrete (18) is poured, the upper surface of the concrete (18) is positioned slightly below the upper surface of the main body (2), and the concrete (1
As long as 8) does not flow in, the lid body (3) may be omitted. Further, instead of the lid body (3), by attaching a sheet or the like to the upper surface of the block body (2) in advance, The concrete (18) may be prevented from flowing into the upper reinforcing bar holding portion (8).

The concrete (18) immediately after being placed on the frame plate (15) has fluidity, but the lower base (1) of the block (17) is fixed to the frame plate (15) and the main body (2) is also fixed. The lower and upper reinforcing bars (12) and (13) are supported by the reinforcing bars (16a) and (16b) of the reinforcing bar assembly (16), and the main body (2) of each of the blocks (17) is further connected. The block (17) is not displaced even if it receives a load that the concrete (18) tries to flow down, because it is linearly connected by the rod (14) to the adjacent one in the longitudinal direction. The block (17) provides resistance to the concrete (18) flowing down, which helps prevent the sloping lower concrete (18) from becoming thick.

After hardening the concrete (18), the columns (19), the frame plate (1
When the concrete formwork including 5) is removed and the upper reinforcing bar holding part (8) of the main body (2) is covered with the lid body (3) or sheet, the lid body (3) is hit and broken. These are removed by peeling off the sheet. By doing so, there is a central portion (13a) of the upper reinforcing bar (13) within the upper reinforcing bar holding section (8) having a substantially box shape, and the portion protruding from the upper reinforcing bar holding section (8) of the upper reinforcing bar (13) is Since it is embedded in the concrete (18), a supporting member (20) such as a metal rafter supported on the concrete (18) via an anchor (not shown) at the central portion (13a) of the upper rebar (13). ) Can be fixed and the roof (21) can be roofed on these support members (20).

In addition, there is a central portion (12a) of the lower rebar (12) in the lower rebar holding portion (4) which is substantially in the shape of an inverted box, and a portion protruding from the lower rebar holding portion (4) of the lower rebar (12) is made of concrete ( 18) is embedded in the center of the lower rebar (12) (12a).
A female screw member (26) is rotatably supported by the shaft and accommodated in the lower rebar holding portion (4).
6) When the frame plate (15) is removed, gravity rotates the tip so that the tip of the frame plate (15) lowers, and the female screw member (26) moves vertically as shown by the chain line in Figs. 13b and 20. Then, the tip portion thereof projects below the lower reinforcing bar holding portion (4), that is, below the hardened concrete (18). The female thread member (2
6) may have such a length that the tip portion does not project below the lower reinforcing bar holding member (4). Therefore, after this state is reached, the male screw portion provided on the upper portion of the ceiling suspension bolt (27) is screwed from the lower portion to the female screw portion (26c) of the female screw member (26) to tighten the suspension bolt (27). A ceiling plate can be suspended from the lower end of the bolt (27) by an appropriate means, and the ceiling plate can constitute the ceiling.

In addition, in the above-mentioned embodiment, although the thing which has the internal thread member for suspending a ceiling suspension bolt was described, this invention can be used also for attachment of a screw member other than a ceiling suspension bolt.

22 to 25 show leveling blocks used in another embodiment of the present invention. 22 to 25, the same reference numerals as those in FIGS. 1 to 14 and 17 denote the same parts, and (22) is a height adjusting member. The height adjusting member (22) is integrally molded with the lower base (1) and the block main body (2) with the same synthetic resin, and is formed on the outer peripheral side of the inner ring (23) as shown in FIG. Six thin connecting rods (24) are projected radially at an equal angle with the center of the ring (23) as a center, and a joint leg (25) extending vertically is provided at the tip of the connecting rod (24). Each is provided. The joint leg (25) is arranged at a position facing the leg portion (11) of the block body (2) and the fitting portion (6) of the lower base (1), and has a fitting recess of the leg portion (11) at the lower end. A fitting recess (25c) similar to (11b) is formed, and a fitting projection (25b) similar to the fitting projection (6a) of the lower table (1) is formed at the upper end through the step (25a). ing. Then, the fitting protrusion (6b) of the lower base (1) and the fitting recess (25c) of the joint leg (25) are fitted to each other, and the fitting protrusion (25b) of the joint leg (25) and the block body ( The main body (2) is fixed on the lower table (1) through the height adjusting member (22) by being fitted into the fitting recess (11b) of (2). The structure of the level setting block shown in FIGS. 22 to 25 is the same as that of the level setting block shown in FIGS. 1 to 14 and 17 except for the above-mentioned configuration.

In the embodiment using the height adjusting member described above, the reinforcing bar assembly (16) is placed on the frame plate (15) of the concrete formwork as shown in FIG. And a fitting projection (6b) provided on the fitting part (6) of the lower table (1) with a fitting recess (25c) provided on the joint leg (25) of the height adjusting member (22) from above. To the connecting legs (2
By supporting the lower end surface of 5) on the step (6a) of the fitting part (6), the adjusting member (22) is fixed on the lower table (1). Next, from the top, the legs (11) of the block body (2)
The fitting recesses (11b) provided in the fittings are fitted into the fitting projections (25b) provided in the joint legs (25) of the height adjusting member (22), and the lower ends of the legs (11) are joined to the joint legs. By supporting it on the step (25a) of (25), the main body (2) is fixed on the adjusting member (22) to assemble the leveling block (17), and these adjacent main bodies (2) are assembled. The leveling device is completed by connecting with the connecting rod.

After the leveling device is completed, the concrete (18) is placed in a thickness equal to or slightly thinner than the height of the block, using the upper surface of the block (17) as a mark. In the embodiment shown in FIG. 25, one height adjusting member (22) is provided for one leveling block (17).
However, when the concrete to be poured is thick, a plurality of height adjusting members (22) may be vertically connected and interposed between the lower stand (1) and the block body (2). . Further, in the present invention, a height adjusting member in which the height of the joint leg is different depending on the thickness of the concrete to be poured may be interposed between the lower table (1) and the block body (2). Since there are only a few types of concrete thickness, it is sufficient to prepare several types of height adjusting members with different joint leg heights in advance.

In both of the above embodiments, the fitting protrusion (6b) is attached to the lower base (1).
The fitting recess (11b) is provided in the leg portion (11) of the block body (2), and these are fitted through the height adjusting member (22) as necessary. , The fitting recess is provided on the lower base, and the fitting projection is provided on the leg of the block body.
The block main body and the lower base may be positioned and fixed in the height direction by fitting them through a height adjusting member as needed, and the number of legs of the block main body can be appropriately increased or decreased.

Further, in the above-mentioned both embodiments, the case of using for a roof having a slope has been described, but the leveling block according to the present invention is not limited to one having a slope,
It can also be applied to horizontal roofs and floors.

In this case, adjacent block bodies may be laterally connected by a connecting rod, and in the present invention, a plurality of fitting grooves are provided close to the connecting portion of the block body, and these are selectively used. Alternatively, the cross-sectional shape of the connecting rod may be appropriately changed to an angle, a flat plate, or the like, but the connecting rod and the fitting groove may be omitted.

The order of assembling the respective parts in the present invention is not limited to the above-described embodiments and can be changed as appropriate.

In the leveling devices of both the above-mentioned examples, since the lower base and the block body of the leveling block are made of a synthetic resin molded product, the weight is lighter than that of the conventional concrete leveling block, and the lower base is made of concrete. After fixing on the formwork, by fixing the main body to these, even if there is a slight error in the position of the reinforcing bar assembly, the legs of the main body are bent or the number of legs is large. In some cases, by cutting off some of the legs, they can be easily fixed to the main body on the lower table, and therefore workability during transportation and assembly is good, and the degree of freedom for the bar arrangement is large. Further, since the lower table is fixed to the formwork when pouring concrete, the leveling block does not move unintentionally, and moreover, the connecting rod is connected to the fitting portion provided in the connecting portion of the block body. By connecting the block main body with one adjacent to each other in one of the vertical and horizontal directions, it is difficult to displace even when the block main body is lightweight even when pouring concrete. Further, since the lower table, the lower and upper reinforcing bars held by the main body are embedded in the concrete, the lower table and the main body do not come off when the concrete formwork is removed after the solidification of the concrete.

In the above-described embodiment, the central portion of the lower reinforcing bar is engaged and supported by the notches formed in the both side walls of the lower reinforcing bar holding portion so as to engage downward. May be formed so as to face each other, a lower reinforcing bar may be inserted into and supported by these holes, and both ends of the lower reinforcing bar protruding from the both side walls may be embedded in concrete.

That is, as shown in FIGS. 27 and 28, a pair of holding holes (4c) are formed in the long side wall (4a) of the lower reinforcing bar holding portion (4),
The lower rebar (12) is inserted through these holding holes (4c). The lower rebar (12) has a proximal end portion of a female screw member (26) pivotally supported by a central portion (12a) in a vertically rotatable manner.
Bend the standing part (12e) upward from both ends of a) at a right angle,
Both ends (12c) of the upper end are bent at a right angle to the outside. The female screw member (26) may have a wide base end portion as shown in FIG. 29. As shown in FIGS. 30 and 31, the female screw member is constituted by a nut, and the nut ( 26e) is welded to the central part of the bracket (26f), and a hole (26g) of the same diameter as that which communicates with the female screw hole of the nut (26e) is provided in the central part of the bracket (26f). May be pivoted at the center of the lower rebar (12) so that both ends thereof are bent at a right angle and face each other. In addition, this female screw member (2
In 6), a guide member (26i) having a taper hole (26h) having a small diameter on the nut side may be welded to the side opposite to the nut (26e) at the center of the bracket (26f) as shown by the chain line. Further, the female screw member (26) is such that the bracket (26f) has a substantially angled shape as shown in FIG. 32, and the tubular portion (26j) provided at the base end portion of the bracket (26f) has a central portion of the lower rebar. The nut (26e) may be rotatably pivoted to the end of the bracket (26f) and welded to the tip of the bracket (26f) coaxially with the hole (26g) provided in the bracket (26f). 26
f) Taper hole (26h) on the surface opposite to the nut (26e)
The guide member (26i) having the can be welded. Furthermore, the third
As shown in FIG. 3 and FIG. 34, the base end of the female screw member (26) is rotatably supported by the shaft (28) on the lower rebar holding part (4), and the lower end is supported on the shaft (28). The U-shaped or V-shaped central portion (12f) of the reinforcing bar (12) is locked, and both ends (1) of the lower reinforcing bar (12) are locked.
2c) may be projected above the lower reinforcing bar holding portion (4).
The lower rebar holding portion (4) shown in FIGS. 27, 28, 33, and 34 is configured integrally with a lower stand (not shown), and the shape of the lower rebar holding portion (4) is also The upper surface can be appropriately changed to a substantially right-angled triangular shape with an inclination. Then, as shown in FIG. 35, the upper female screw member (29) is fixed integrally with the upper reinforcing bar holding portion (8), and the upper female screw member (29) is provided at the lower end portion of the suspension. The screw portion may be tightened and the roof plate may be locked by the suspender. In this case, the upper reinforcing bar may be omitted.

〔The invention's effect〕

As described above, the concrete leveling device according to the present invention includes a lower base having a lower rebar holding portion substantially in the shape of an inverted box, and a block main body having a plurality of legs protruding below the outer periphery of the upper portion. A plurality of leveling blocks each having a screw member, a central portion of the lower rebar is erected on the lower rebar holding portion of the lower table, and a base end portion of the female screw member is rotatably supported by the central portion. Then, the female screw member is housed in the lower reinforcing bar holding portion, and both ends of the lower reinforcing bar are projected outside the lower reinforcing bar holding portion so that they can be embedded in concrete to be placed on a concrete formwork, and the lower base is The concrete formwork is fixed vertically and horizontally with a space between each other, and the legs of the block body are supported and fixed on the lower stand, and the height at which the lower stand and the block body are fixed is set to the concrete formwork. above Since substantially coincide with the thickness of the setting to the concrete, the following effects can be obtained.

That is, the concrete leveling device according to the present invention is rotatably mounted at the center of the lower reinforcing bar installed on the lower reinforcing bar holding section of the lower table when installing the lower table of the leveling block on the concrete formwork. Since a screw member for axially supporting the end is housed in the lower rebar holding portion, a large number of leveling blocks are used, concrete is cast on the concrete formwork and hardened, and then the concrete plate shape When the mold is removed from the body, the female screw member rotates about the center of the lower rebar due to gravity, and the female screw member and the female screw hole are kept in a vertical state even if the concrete board has a gradient. Therefore, a male screw member such as a ceiling hanging bolt can be easily screwed into the female screw hole, and the male screw member can be easily held vertically. The wood can be attached good workability.

[Brief description of drawings]

FIG. 1 is an exploded front view showing a concrete leveling block used in an embodiment of the present invention, FIG. 2 is a front view of the same assembled state, FIGS. 3 and 4 are the same plan view and bottom view, 5 is a plan view of the lower table, FIGS. 6 and 7 are sectional views taken along lines VI-VI and VII-VII of FIG. 5, FIG. 8 is a plan view of the block body, and FIG. Explanatory drawing of the fitting groove of the block main body, FIG. 9 and FIG. 10 are upper sectional views taken along line IX-IX and line XX of FIG. 8, and FIGS. 11a and 11b are front views of the lower reinforcing bar, Plan view, FIG. 12 Inclined view of female screw member, 13
Figures a and b: Horizontal and vertical cross-sectional views of the female screw member housed in the lower rebar holding portion of the lower table;
a, b, FIG. 16 a, b are front views and plan views showing different upper reinforcing bars, FIG. 17 is a perspective view of a connecting rod, and FIGS. 9 and 10 are sectional views corresponding to FIG. 10, and FIG. 20 is a vertical sectional view showing a reinforced concrete disk obtained by using a concrete leveling device according to an embodiment of the present invention, and FIG. FIG. 22 is a partial plan view of a state in which a leveling block is fixed on a concrete formwork, FIG. 22 is an exploded front view showing a concrete leveling block used in another embodiment of the present invention, FIG. 23 and FIG. 24 is a front view and a side view of the same assembled state, FIG. 25 is a plan view of a height adjusting member, and FIG. 26 is a reinforced concrete board obtained by using a concrete leveling device according to another embodiment of the present invention. Vertical cross-sectional view showing a cylindrical body, Fig. 27, Fig. 28 Female thread portion And a front view of the lower rebar holding portion showing a modified example of the lower rebar, a bottom view, FIG. 29 is a plan view showing a modified example of the female screw member, and FIGS. 30 and 31 show another modified example of the female screw member. Front view, side view, FIG. 32 is a side view showing still another modification of the female screw member, FIG. 33, FIG.
Fig. 34 is a vertical cross-sectional view and cross-sectional view of the lower reinforcing bar holding part showing another modification of the female screw member and the lower reinforcing bar, and Fig. 35 is a vertical cross-sectional view of the upper reinforcing bar holding part to which the upper female screw member is fixed. is there. (1) …… Lower stand, (2) …… Block body, (3) ……
Lid, (4) …… Lower rebar holding part, (4a) …… Sidewall, (4
b) …… notch, (5) …… supporting part, (6) …… fitting part,
(6a) ... step, (6b) ... fitting convex part, (7) ... connecting part, (8) ... upper reinforcing bar holding part, (8a) ... side wall, (8b)
...... Notch, (9) ...... Support part, (10) ...... Connection part, (10
a) …… Mating groove, (11) …… Legs, (11a) …… Lower end,
(11b) …… Mating recess, (12) …… Lower rebar, (12a) ……
Central part, (12b) …… hanging part, (12c) …… end part, (12
d) …… Upward slope, (13) …… Upper rebar, (13a) ……
Center part, (13b) …… Downward part, (13c) …… Short part, (14)
...... Connecting rod, (14a) ...... Web part, (14b) …… Flange part, (15) …… Frame plate of concrete formwork, (16) ……
Reinforcing bar assembly, (16a), (16b) …… Vertical, horizontal bar, (17)
…… Level setting block, (18) …… Concrete,
(19) …… Post, (22) …… Height adjustment member, (23) ……
Inner ring, (24) …… connecting rod, (25) …… joint leg, (25
a): step, (25b) ... fitting convex part, (25c) ... fitting concave part, (26) ... female screw member, (26a) ... shaft hole, (26b)
...... Guide part, (26c) ...... female screw part, (26d) …… female screw hole, (27) …… Ceiling suspension bolt.

Claims (6)

[Claims] 1. A large number of leveling blocks each having a lower base having a substantially inverted box-shaped lower rebar holding portion, a block main body having a plurality of legs protruding below the outer periphery of an upper portion, and a female screw member. A lower rebar holding portion of the lower table, a central portion of the lower rebar is erected, and a base end portion of the female screw member is rotatably supported by the central portion, and the female screw member holds the lower rebar. Inside of the lower rebar, both ends of the lower rebar are projected outside the lower rebar holding part so that they can be embedded in concrete that is placed on the concrete form, and the lower stand is vertically and horizontally spaced from each other on the concrete form. And fixed, while supporting and fixing the legs of the block body on the lower table,
A concrete leveling device, characterized in that the height at which the lower base and the block body are fixed is made substantially equal to the thickness of concrete to be cast on the concrete formwork. 2. A leveling block has a height adjusting member in which a connecting leg for fixing between a lower table and a leg portion of a block body is connected by a connecting rod, and the height adjusting member is provided on the lower table. The leveling device for concrete according to claim 1, wherein the height at which the block main body is fixed through it is made substantially equal to the thickness of the concrete to be placed on the concrete formwork. 3. A block main body is provided with a connecting portion in which a fitting groove having an open upper surface is formed on an outer periphery of an upper portion, and a plurality of leg portions are projected below the connecting portion, so that adjacent block main bodies are connected to each other. , Fitting the connecting rod into the fitting groove of these bodies,
The leveling device for concrete according to claim 1, wherein the leveling device is connected to each other in one of the vertical and horizontal directions. 4. The block main body has a box-shaped upper rebar holding portion formed in an upper portion thereof, and a lid body covering the upper rebar holding portion is removably fixed to the block main body, and is attached to the upper rebar holding portion. The center portion of the reinforcing bar is erected, and both ends of the upper reinforcing bar are projected outside the upper reinforcing bar holding portion so that they can be embedded in concrete. The concrete according to claim (1), (2) or (3). Leveling device. 5. The block main body has an upper female screw member, which is open at the upper surface of the main body, fixed to the upper portion of the block main body.
Alternatively, the concrete leveling device described in (4). 6. The female screw member has a tapered hole provided with a tapered surface having a small diameter from the tip toward the female screw hole, (1), (2), (3), (4) or (5). The concrete leveling device described in.