JP2004183439A - Fixture and method for disassembling slab form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixture and a method for disassembling slab forms by which the slab forms are disassembled simply. <P>SOLUTION: The fixture 1 is composed of a lower spacer 2 in which a mounting pin 6 is projected from an underside, and an upper spacer 3 detachably installed to the lower spacer 2. The fixture is constituted so that half pieces 7 half-split in the longitudinal direction are displaced from each other in the horizontal direction and attached closely at stepped joining sections in the mounting pin 6, hooks 9 are formed to upper and lower sections of the half pieces 7 at proper intervals 8 and folding-removing grooves 10 are formed to the half pieces 7 in the vicinity of the upper hooks. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fixture and a method for dismantling a slab formwork.
[0002]
[Prior art]
As a fixture for a hollow material in a conventional hollow slab, there is, for example, one disclosed in JP-A-2000-160511. As shown in FIG. 2, this fixing tool has a hollow slab pipe P installed on a receiving table 1 fixed to a mold A by a fastening member 9 and bolts 8.
[0003]
[Patent Document 1]
JP 2000-160511 A (FIG. 2)
[0004]
[Problems to be solved by the invention]
However, the above-mentioned fixture has the following problems.
(1) The fixing tool and the spacer are separate bodies. (2) To attach the fixing tool to the formwork, work from the upper and lower sides of the slab formwork is required. (3) For dismantling the slab formwork Had to remove the bolt from below
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a fixture and a method for disassembling a slab formwork that can easily disassemble the slab formwork.
[0006]
[Means for Solving the Problems]
The gist of the fixing device of the present invention for achieving the above object is to provide a lower spacer having a mounting pin projecting from a lower surface thereof, and an upper spacer detachably mounted on the lower spacer. Are halved in the length direction, the half halves are laterally shifted from each other and are closely contacted at the joint portion, and hooks are formed at the upper and lower portions of the half halves with an appropriate gap therebetween. The half piece has a configuration in which a cutout groove is formed.
Further, in the disassembling method of the slab form, the fixing tool according to claim 1 is installed by inserting a mounting pin into an insertion hole in a bottom plate of the slab form, and after binding the upper spacer of the fixing tool and the upper end muscle of the slab, Concrete is poured into the slab formwork, and after the concrete has hardened, the stepped state at the joint portion of the mounting pin halves is released, and the halves are overlapped so that the halves are integrated. Then, the bottom plate is removed by pulling out the mounting pin from the insertion hole, and the mounting pin protruding from the concrete from which the bottom plate has been removed is cut off from the groove.
In addition, the disassembly method of the slab form is provided with a hook gradually projecting downward at a lower portion of a half-piece that is protrudingly provided at a lower portion of the fixture, and is halved in a length direction, and directly above the hook or At least one of the roots of the halves of the slab is inserted into the insertion hole in the bottom plate of the slab form by inserting a mounting groove formed at the bottom of the slab form, or a mounting pin having a narrow base of the halves. After bundling the upper end of the slab on the fixture, concrete was poured into the slab form, and after the concrete had hardened, it was formed directly above the hook or at least one of the roots of the halves. The present invention is characterized in that the bottom plate is removed after folding or twisting the mounting pin from the base of the cut-out groove or the thin half-piece.
[0007]
Since the fixture for preventing the floating of the hollow material due to the casting of the concrete into the slab formwork and the spacer for arranging the bars can be used at the same time, the construction can be omitted and the material cost can be reduced. Since the upper spacer can be removed from the lower spacer, its height can be freely changed. Various slab thicknesses can be accommodated only by changing the height of the upper spacer. Since the half of the mounting pin can be easily cut off by the cutout groove, the slab form can be easily disassembled. The slab form can be easily disassembled by breaking the hook from the groove just above the hook. Further, the slab form can be easily dismantled by breaking off the mounting pin from the groove at the base of the half piece. In addition, the slab form can be easily dismantled by twisting off the mounting pin from the thinned base.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a disassembly method of a fixture and a slab form according to the present invention will be described with reference to the drawings. First, the fixture will be described, and then a method of disassembling the slab form will be described. Further, in each embodiment, the same components are denoted by the same reference numerals, and only different components are denoted by different reference numerals.
[0009]
FIG. 1 shows a fixing device 1 according to the first embodiment, that is, a fixing device used when fixing a hollow material of a hollow slab, and includes a lower spacer 2 and an upper spacer 3. The lower spacer 2 is formed of a plastic into a flat H shape in which a plate 4 is joined with a connecting plate 5, and the connecting plate 5 is integrally formed with a mounting pin 6.
[0010]
As shown in FIG. 2, the mounting pin 6 is formed by halving the half pieces 7 in the length direction so as to be shifted from each other in the lateral direction. A hook 9 is formed, and the hook 9 is formed with a gradually decreasing diameter toward both ends. Further, in the half piece 7 near the upper hook 9, there is formed a breaking groove 10 which can easily break the half piece 7. Further, the lower side of the half-piece 7 is tightly joined by the step joint part 11 so that it cannot slide in the direction in which the half-piece 7 joins. It has become.
[0011]
The upper spacer 3 is for installing the upper end muscle of the slab. The upper spacer 3 is formed by binding steel wires of an appropriate length constituting the four legs 12 at the upper portion. 12a are formed.
[0012]
FIG. 3 is a perspective view showing a fixture 13 according to the second embodiment, in which a lower spacer 14 and an upper spacer 15 are connected via connectors 16 and 17. The lower spacer 14 is provided with the mounting pins 6 having the same configuration as described above, and the upper spacer 15 is formed with a concave portion 18 on which the upper end of the slab is placed. Since the lower spacer 14, the upper spacer 15, and the connecting members 16 and 17 are formed of plastic and can be separated from each other, the height thereof can be freely changed.
[0013]
FIG. 4 is a cross-sectional view in which the hollow member is fixed by using the fixing tool 1 described above. The mounting pin 6 is inserted into the insertion hole 20 opened in the slab form 19 and the hook 9 of the mounting pin 6 The fixture 1 is fixed. The lower spacer 2 of the fixing device 1 is provided with a slab lower end streak 21 to secure this cover thickness. A hollow member 22 is provided on the lower slab 21 of the slab, and the upper slab 23 of the slab arranged on the hollow member 22 is supported by the upper spacer 3 and bound by a binding wire 24. In this way, the fixture 1 fixes the hollow member 22 and secures the space between the lower slab muscle 21 and the upper slab muscle 23 by the lower spacer 2 and the upper spacer 3.
[0014]
Next, a method of disassembling the slab formwork of the first embodiment using the fixing tool 1 will be described. In this method, the lower spacer 2 and the upper spacer 3 of the fixture 1 are used separately. First, as shown in FIG. 5, an insertion hole 20 is opened in the template of the slab form 19, and the lower spacer 2 is mounted by inserting the mounting pin 6 from above the slab form 19.
[0015]
As shown in FIG. 6, the method of inserting the mounting pin 6 releases the stepped state of the half-piece 7 at the joint portion 11 so that the half-pieces 7 can slide in a direction in which they are integrated. . Then, when the mounting pin 6 is inserted into the insertion hole 20 in this state, as shown in FIG. 20 smaller than the inner diameter.
[0016]
When the hook 9 passes through the insertion hole 20, the half piece 7 returns to the original position as shown in FIG. 8, and the lower spacer 2 is fixed by the hook 9. Further, since the half pieces 7 are closely connected in a stepped manner at the stepped joint portion 11, the attachment pin 6 is prevented from coming out of the insertion hole 20 due to vibration of the slab form 19 or the like.
[0017]
Next, a lower slab reinforcement 21 is arranged on the lower spacer 2, and a hollow material unit 25 in which a spherical hollow material 22 is joined by a connecting reinforcement 26 is installed on the lower slab reinforcement 21. Then, the upper slab reinforcement 23 is arranged on the hollow member 22, and the upper slab reinforcement 23 is supported by the upper spacer 3 attached to the lower spacer 2 and bound by the binding wire 24. In this manner, the hollow member 22 is fixed to the slab formwork 19, and a predetermined space is ensured to arrange the upper slab upper reinforcement 23 and the lower slab reinforcement 21. Therefore, even if the concrete 27 is poured into the slab formwork 19, the hollow member 22 fixed by the fixture 1 does not float.
[0018]
Next, as shown in FIG. 9, after the concrete 27 has hardened, the stepped state of the half joint pieces 7 of the mounting pins 6 at the joint portion 11 is released, and the half pieces 7 are integrated with each other. When the portion having the maximum diameter of the hook 9 is slid over and the mounting pin 6 becomes smaller than the inner diameter of the insertion hole 20, the bottom plate is removed by pulling out the mounting pin 6 from the insertion hole 20. The slab formwork 19 is dismantled. Then, due to the disassembly of the slab form 19 due to the removal of the bottom plate, the mounting pins 6 project from the concrete 27, and are struck with a hammer or the like to be cut out from the cut-out grooves 10.
[0019]
FIGS. 11 and 12 show a method of disassembling the slab formwork according to the second embodiment. As shown in FIG. The slab of the first embodiment, except that a mounting pin 28 having a hook 9 tapered gradually toward the bottom and having a groove 10 provided directly above the hook 9 and at the base of the half-piece is used. It is the same as the dismantling method of the mold.
[0020]
As shown in FIG. 12, the method of dismantling the slab formwork is such that after the concrete 27 of the slab formwork 19 has hardened, the hook 9 is cut off by the cutout groove 10 just above the hook, and the slab is removed by removing the bottom plate. After the mold 19 is disassembled, the half pieces 7 are cut off by the cutout grooves 10 at the base. By breaking off the half pieces 7 in this manner, the bottom plate can be easily removed, so that the slab formwork 19 can be easily disassembled.
[0021]
FIGS. 13 and 14 show a method of disassembling the slab formwork of the third embodiment. As shown in FIG. 13, the lower part of the half piece 7 gradually becomes thinner toward the lower side. The method is the same as the disassembly method of the slab formwork of the second embodiment, except that a mounting pin 29 having a hook 9 and a fold groove 10 at the base is used.
[0022]
As shown in FIG. 14, the method of dismantling the slab formwork is such that after the concrete 27 of the slab formwork 19 has hardened, the half piece 7 is cut off by the groove 10 at the base, and the bottom plate is removed to remove the slab. The mold 19 is dismantled. By breaking off the half pieces 7 in this manner, the bottom plate can be easily removed, so that the slab formwork 19 can be easily disassembled.
[0023]
FIG. 15 shows a method of disassembling the slab formwork according to the fourth embodiment. As shown in FIG. 15, a hook 9 gradually tapering downward is provided below the half piece 7. The method is the same as the disassembly method of the slab formwork of the second embodiment, except that a mounting pin 30 having a thinner base is provided.
[0024]
In the same manner as described above, the slab form 19 is also dismantled by hardening the concrete 27 of the slab form 19 and then twisting the half-piece 7 from the thinned base. By twisting off the half pieces 7 in this way, the bottom plate can be easily removed, so that the slab formwork 19 can be easily disassembled.
[0025]
【The invention's effect】
Fixtures that prevent the hollow material from floating when concrete is poured into the slab formwork can also be used as spacers for reinforcing bars, so construction can be omitted and material costs can be reduced. .
[0026]
Since the upper spacer can be removed from the lower spacer, its height can be freely changed.
[0027]
Various slab thicknesses can be accommodated only by changing the height of the upper spacer.
[0028]
Since the half of the mounting pin can be easily broken, the slab form can be easily disassembled.
[0029]
The slab form can be dismantled simply by removing the hook of the mounting pin of the lower spacer from the hole.
[0030]
The slab form can be easily disassembled because the mounting pin can be easily broken off from the groove directly above the hook or from the groove at the base.
[0031]
Since the mounting pin can be easily broken off from the thinned base, the slab formwork can be easily disassembled.
[Brief description of the drawings]
FIG. 1 is a perspective view of a fixture according to a first embodiment.
FIGS. 2A and 2B are front views of mounting pins, FIG. 2B is a cross-sectional view taken along line AA of FIG. 1, FIG. 2B is a cross-sectional view taken along line BB of FIG. FIG. 6 is a sectional view, (5) is a sectional view taken along the line DD, and (6) is a perspective view of a mounting pin.
FIG. 3 is a perspective view of a fixing device according to a second embodiment.
FIG. 4 is a cross-sectional view in which a hollow member is fixed with a fixing device.
FIG. 5 is a sectional view of a lower spacer attached to a slab formwork.
FIG. 6A is a cross-sectional view before the mounting pin is inserted into the insertion hole, and FIG. 6B is a cross-sectional view taken along line EE of FIG.
FIG. 7A is a cross-sectional view of the mounting pin being inserted into the insertion hole, and FIG. 7B is a cross-sectional view taken along line FF of FIG.
8A is a cross-sectional view in which a mounting pin is inserted into an insertion hole, and FIG. 8B is a cross-sectional view taken along line GG of FIG.
FIG. 9 is a cross-sectional view of a method of attaching a hollow member with a fixture.
FIG. 10 is a cross-sectional view in which a mounting pin is cut off.
11A is a sectional view of a mounting pin, and FIG. 11B is a sectional view taken along line HH of FIG.
FIGS. 12 (1) to (4) are cross-sectional views showing a method of disassembling a mold in a method of fixing a hollow material according to a second embodiment.
FIG. 13 is a sectional view of a mounting pin.
FIGS. 14 (1) to (3) are cross-sectional views showing a method of dismantling a mold in a method of fixing a hollow member according to a third embodiment.
FIG. 15 is a cross-sectional view of a mounting pin used in the method for fixing a hollow member according to the fourth embodiment.
[Explanation of symbols]
1, 13, 29 Fixtures 2, 14 Lower spacer 3, 15 Upper spacer 4 Plate 5 Connecting plate 6, 28, 29 Mounting pin 7 Half 8 Gap 9 Hook 10 Folding groove 11 Joint 12 Leg 12a Folded portions 16, 17 Connector 18 Recess 19, 34 Slab formwork 20 Insertion hole 21 Slab lower end streaks 22, 31 Hollow material 23 Slab upper end streak 24 Binding wire 25 Hollow material unit 26 Connecting streak 27 Concrete

Claims (3)

It consists of a lower spacer with a mounting pin protruding from the lower surface and an upper spacer detachably mounted on the lower spacer. And a hook is formed at the upper and lower portions of the half piece with an appropriate gap therebetween, and a cut-off groove is formed in the half piece near the upper hook. Fixture. The fixing tool according to claim 1 is installed by inserting a mounting pin into an insertion hole in a bottom plate of the slab form, and after binding an upper spacer of the fixing tool and a top slab of the slab, concrete is poured into the slab form. After the concrete has hardened, the stepped state at the joint portion of the halves of the mounting pins is released, and the halves are overlapped so as to be integrated, and then the mounting pins are inserted. A method of disassembling a slab formwork, wherein a bottom plate is removed so as to be pulled out from a hole, and a mounting pin projecting from the concrete from which the bottom plate has been removed is cut off from a groove. At the bottom of the half of the half-length piece protruding from the lower part of the fixture, a hook gradually tapering downward is provided, and directly above the hook or at least one of the roots of the half-piece A fixing pin is installed in the slab form by inserting a mounting groove in which a base of the cut-out groove or the half of the half piece is formed into a thin plate, and a fixing tool is installed on the slab form. After bundling, concrete was poured into the slab formwork, and after the concrete had hardened, a cut-out groove formed directly above the hook or at least one of the roots of the half-piece, or formed into a thin shape. A method for disassembling a slab formwork, comprising: folding or twisting a mounting pin from a base of a half-piece, and removing a bottom plate.

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