JP3689376B2 - Void holding device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an apparatus for maintaining the position of a void attached to a floor structure material in order to reduce the weight of a concrete slab.
[0002]
[Prior art]
Conventionally, when a void is attached to a floor structure material in order to reduce the weight of a concrete slab, wiring, etc., the void is fastened and fixed with a wire or a wire.
As to solve the problems of the applicant previously took as much as possible increases the vertical dimension of the void as elliptical cross section, preventing the floating of voids pressing the up and down by the arrangement forces the lower end muscle and Hairyoku upper muscle I proposed what I did (Japanese Patent Application 2001-214676) .
However, since the size of the void is restricted in order to obtain the effect of the above invention, a simple auxiliary means for maintaining the position of the void has been desired.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a simple means for preventing the void from rising and holding it in a predetermined position regardless of the size of the void.
[0004]
[Means for Solving the Problems]
In the present invention, a plurality of suspending bars having a plurality of mountain-shaped bent portions are arranged in parallel on the substrate, and the upper end bars of the truss are fixed to the lower side of the top of each bent portion of the suspending bars. In the floor structure material positioned above the substrate and having voids disposed between the bent portions of the suspension bars, the lower side of the voids between the upper end bars of the adjacent trusses in order to maintain the position of the voids. disposed lower holding member for holding the, disposed the upper holding member for holding the upper side of the void between the upper muscle of the adjacent truss and the lower end muscle, the adjacent end of the upper retaining member The void retaining device is configured by engaging with the upper end of one truss and engaging the other end with the lower end of the other truss .
The upper holding member includes a first upper holding member disposed between an upper end bar of one truss adjacent to the void and a lower bar bar of the other truss, and one truss adjacent to the void. It is preferable that the second upper holding member disposed between the lower end bar and the upper bar of the other truss is disposed in combination.
And if the said upper holding member is made from spring steel and it is made to latch elastically to an upper end reinforcement and a lower end reinforcement, construction will be easy. However, the material of the upper and lower holding members may be a synthetic resin in addition to a metal.
For the purpose of reducing the weight of the slab, the void is preferably a foamed polystyrene having an elliptical cross section. However, the shape and material are not limited, and a steel pipe can also be used.
[0005]
[Action]
In this invention, since the lower side of the void is held by the lower holding member and the upper side of the void is held by the upper holding member, the void is sandwiched by the upper and lower holding members and does not float when placing concrete.
In particular, in the claimed invention, the upper one side of the void is held by the first upper holding member and the upper other side of the void is held by the second upper holding member, and the movement of the void in the lateral direction is also prevented. The
Further, if the upper and lower holding members are attached to the upper and lower ends, the attachment is easy and the workability is improved.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the drawing, a plurality of suspension bars 2 are arranged at equal intervals and in parallel on the upper surface of the iron plate 1. A plurality of mountain-shaped bent portions 3 are formed at equal intervals on the suspending bar 2, and the upper end bars of the truss 4 disposed at right angles to the suspending bar 2 below each apex 3 a of the bent portion 3. 5 is fixed. The truss 4 is composed of an upper end bar 5, a lattice bar 6, and a lower end bar 7, and the lower end bar 7 is positioned above the iron plate 1 so as to obtain a concrete covering.
In the figure, reference numeral 8 is a distribution upper end bar disposed above the upper truss 5 of the truss, 9 is a lower distribution bar disposed above the lower end bar 7 of the truss, Before the void is disposed, the distribution upper end muscle 8 is disposed after the void is disposed.
[0007]
A void 10 is disposed between the bent portions 3 of the hanging muscle 2. The void 10 has a vertically long cross-sectional oval shape and is made of polystyrene foam. The void 10 is held by a lower holding member 11, a first upper holding member 12, and a second upper holding member 13.
In FIG. 1, the lower holding member 11, the first upper holding member, and the second upper holding member are arranged in this order from the left side, but the order is not limited.
[0008]
The lower holding member 11 is a wire, and as shown in FIG. 2, the lower holding member 11 has a top portion 11 a that is locked on the upper side of the upper end bar 5 of the truss 4 and a lower portion 11 b that holds the lower side of the void 10. The top 11a is attached to the truss by locking the top 11a with the top muscle 5.
The low portion 11b is curved along the lower end portion and the lower side surfaces of the void 10 so that the lower end portion and the lower side of the void 10 can be held.
[0009]
The first upper holding member 12 is made of spring steel and is disposed between the upper end bar 5a of the left truss 4a in FIG. 3 and the lower end bar 7b of the truss 4b adjacent thereto. One end of the first upper holding member 12 has a hook-like locking portion 12a locked to the lower side of the upper end line 5a, and the other end has a hook-like locking part locked to the lower side of the lower end line 7b. A locking portion 12b is formed, and the intermediate portion 12c is curved along the upper end portion and the upper one side (the truss 4b side) of the void 10 so that the upper end portion and the upper one side of the void 10 can be held. is there.
[0010]
The second upper holding member 13 is also made of spring steel. Contrary to the first upper holding member, the lower bar 7a of the left truss 4a in FIG. 4 and the upper bar of the truss 4b adjacent thereto are shown. 5b. One end of the second upper holding member 13 has a hook-shaped locking portion 13a that locks to the lower side of the lower end muscle 7a, and the other end has a hook-shaped locking portion that locks to the lower side of the upper edge bar 5b. A locking portion 13b is formed, and the intermediate portion 13c is curved along the upper end portion and the upper one side (the truss 4a side) of the void 10 so that the upper end portion and the upper one side of the void 10 can be held. is there.
The first and second upper holding members are the same member, and are attached in opposite directions.
When constructing the void holding device of this embodiment, first, the lower holding member 11 is disposed at a predetermined position. In this arrangement work, the lower holding member 11 is dropped from above the truss 4 and the top portion 11 a is locked to the upper end reinforcement 5.
Next, the void 10 is placed on the lower portion 11 b of the lower holding member 11.
Thereafter, the locking portions of the first and second upper holding members 12 and 13 are locked to predetermined upper and lower end bars. Here, the first 1, since the second upper retaining member is a spring steel, after locking the one end to the lower end muscle First, by taking the procedure for engaging the other end to the upper end muscles, easily Can be attached. Moreover, since it is spring steel, even if the intermediate part is not formed into a curved shape in advance, the intermediate part is naturally deformed along the peripheral surface of the void by engaging both ends.
[0012]
According to the above embodiment, the lower part of the void is held by the lower holding member, and the upper part of the void is held by the upper holding member. Therefore, the upper and lower parts of the void are fixed by the both holding members, and the floating is prevented.
In addition, the lower holding member is curved along the lower surface of the void, and the upper holding member is a first upper holding member that holds one upper side of the void, and a second upper holding member that holds the other upper side of the void. In the lower part, the lower end and both sides of the lower part are held by the lower holding member, and in the upper part, the upper end part and both upper sides are held by the upper holding member. Since it is held by the holding member, not only the floating but also the movement of the lateral position is prevented.
Therefore, the movement of the void at the time of placing the concrete is prevented as much as possible, and the void can be arranged as designed.
[0013]
In the present invention, the shape of the lower holding member is not limited to that shown in the embodiment, for example, a rectangular frame shape that holds the lower end of the void and both upper and lower intermediate portions, or a V-shaped shape that holds only the lower sides. (Fig. 5).
Further, it is also possible to make the middle part an inverted U shape so that one upper holding member can hold both upper sides of the void.
[0014]
【The invention's effect】
According to the present invention, since the voids can be fixed by holding the upper and lower sides of the voids by the holding member, it is possible to prevent the voids from being lifted when the concrete is placed. Since both the upper and lower holding members are locked and attached to the truss, attachment work is easy and workability is improved.
[Brief description of the drawings]
FIG. 1 is a front view of Embodiment 1 of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 showing the lower holding member.
3 is a cross-sectional view taken along the line BB in FIG. 1 showing the first upper holding member. FIG.
4 is a cross-sectional view taken along the line CC of FIG. 1 showing the second upper holding member. FIG.
FIG. 5 is a view showing another aspect of the holding member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Iron plate 2 Suspension 3 Bending part 4 Truss 5 Upper muscle 6 Lattice muscle 7 Lower muscle 8 Distributing upper muscle 9 Distributing lower muscle 10 Void 11 Lower side holding member 12 First upper side holding member 13 Second upper side holding member

Claims (3)

A plurality of suspension bars having a plurality of mountain-shaped bent portions are arranged in parallel on the substrate, and the upper end muscles of the truss are fixed to the lower side of the top of each bent portion of the suspension muscles. Is located between the bent portions of the hanging muscles,
A lower holding member that holds the lower side of the void between upper end bars of the adjacent trusses, and an upper holding member that holds the upper side of the void between the upper and lower bar bars of the adjacent trusses , One end of the upper holding member is locked to the upper end of the adjacent one truss, and the other end is locked to the lower end of the other truss ,
Void holding device   The upper holding member includes a first upper holding member disposed between an upper end of one adjacent truss and a lower end of the other truss, a lower end of one adjacent truss, and an upper end of the other truss. The void holding device according to claim 1, wherein the void holding device is disposed in combination with a second upper holding member disposed between the first upper holding member and the second upper holding member.   The void holding device according to claim 1 or 2, wherein the upper holding member is made of spring steel and is elastically locked to the upper and lower reinforcing bars.

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