KR101413039B1 - Apparatus for preventing buoyancy of hollow member - Google Patents

Abstract

The present invention relates to a device to prevent buoyancy of a hollow member which can prevent a hollow member from being raised by buoyancy when concrete is placed in a hollow slab. More specifically, the device to prevent buoyancy of a hollow member can easily be installed and disassembled and widely be applied to slabs having various thicknesses. According to the present invention, the device to prevent buoyancy of a hollow member comprises: a lower support unit installed in the upper part of a bottom cast to support the lower part of a hollow member; a fastening unit coupled to the lower part of the lower support unit, penetrates the bottom cast to be coupled, and fixates the lower support unit to the bottom cast; a connection unit coupled to the upper part of the lower support unit; and an upper support unit coupled to the upper part of the connection unit to be spaced apart from the lower support unit at a certain interval, wherein the hollow member is located between the lower support unit and the upper support unit.

Description

Technical Field [0001] The present invention relates to an apparatus for preventing buoyancy of a hollow member,

The present invention relates to a hollow rebuffer preventing device for preventing a hollow material from rising due to buoyancy when a hollow material is poured in a hollow slab, and more particularly, to a hollow rebuffer preventing device for easily installing and dismounting a hollow material, The present invention relates to a hollow rebound preventing device that can be applied to a hollow slab of a hollow structure.

The hollow slab is a slab with a hollow section at the center of the slab thickness. Even when the slab thickness is increased, the self weight is not greatly increased, and the bending stiffness is not significantly lowered compared with the general slab. .

In general, however, the hollow slab is quite complicated to manufacture for hollow formation.

Therefore, a factory-made PC product can be adopted or a ball type hollow material or tube type hollow material using a lightweight body such as styrofoam, synthetic resin, foam rubber, or the like is disposed at a position where a hollow is to be formed, Were used.

Since the tubular type hollow material can be installed only a small number of times as compared with the ball type hollow material, it is possible to smooth the construction management, reduce manpower and cost for installing and disassembling the buoyancy prevention hardware, So that the void ratio is increased.

However, when concrete is poured in a state where a hollow material is installed, the hollow material rises due to buoyancy, and it is difficult to fix the exact position of the hollow, so that there is a high possibility that the hollow slab is defective.

Therefore, in order to solve such a problem, Patent Document 10-0962298 (structure for preventing injury of lightweight molding material for hollow slabs) and Patent No. 10-1019588 (buoyancy preventing device for hollow slabs) Various techniques have been provided to prevent ashes from appearing, but they are not a fundamental solution.

In addition, in the case of the above-mentioned prior patent, it is not only troublesome to install and dismantle the hollow rebar preventive device in the floor mold, but also to manufacture these devices in different sizes when the size of the hollow material is different according to the slab thickness The efficiency is lowered and the unit price is increased.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a hollow re-buoyancy prevention device that is easy to install and dismount in a floor mold.

It is another object of the present invention to provide a hollow re-buoyancy prevention device which can be applied generally to slabs of various thicknesses.

According to an aspect of the present invention, there is provided a floor structure comprising: A fastener coupled to the lower portion of the lower portion of the floor to be coupled to the floor to fix the lower portion of the floor to the floor; A connection port coupled to an upper portion of the lower frame; And an upper ground coupled to the upper portion of the coupling to be spaced apart from the lower ground by a predetermined distance; Wherein a hollow material is disposed between the lower and upper ground planes, and a hollow material fixture is further provided between the lower and upper planes to surround the hollow material. Lt; / RTI >

According to another preferred embodiment of the present invention, the hollow material fastener includes an outer tube having a lower portion and an upper portion coupled to the lower portion and upper portion, respectively, and an inner tube having a smaller diameter than the outer tube in the outer tube. And a hollow material insertion portion into which the tubular hollow material end is inserted are formed, respectively.

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According to another preferred embodiment of the present invention, the inner pipe of the hollow material fastener is formed longer than the outer pipe, and a chamfer is formed on at least one of the inner side of the outer pipe or the outer side of the end of the inner pipe. Lt; / RTI >

According to another preferred embodiment of the present invention, there is provided a hollow material buoyancy applying device characterized in that a saw-toothed latching protrusion is formed inwardly on at least one of an inner surface of an outer tube or an inner tube outer surface of the hollow material insert portion .

According to another preferred embodiment of the present invention, an open side of a tubular cover member having one side opened and the other side closed is inserted into any one of the hollow member insertion portions to be coupled. to provide.

According to another preferred embodiment of the present invention, the fastener includes a cylindrical fastener body and a fastener body, which is housed in the fastener body and has one end projecting outwardly of the fastener body due to an elastic force, The present invention provides a hollow rebound preventing device.

According to another preferred embodiment of the present invention, there is provided a hollow re-buckling prevention device, wherein a screw part for perforating a bottom mold is integrally formed at the lower end of the fastener body.

According to another preferred embodiment of the present invention, there is provided a hollow re-buoyancy prevention device characterized in that the bottom portion has a polygonal section.

According to another preferred embodiment of the present invention, there is further provided a base member protruding outwardly from the side of the lower portion of the lower portion of the lower portion of the base.

According to another preferred embodiment of the present invention, the upper end of the fastener body of the fastener is screwed to the fastener formed at the lower end of the lower part of the fastener with a threaded head formed on the outer circumferential surface thereof.

According to another preferred embodiment of the present invention, a polygonal tool insertion groove is formed at the upper center of the lower portion of the lower portion.

According to another preferred embodiment of the present invention, there is provided an apparatus for preventing buckling of a hollow structure, wherein a groove portion on which an upper reinforcing bar of a slab is placed is formed in one direction or two directions.

According to the present invention as described above, the following effects can be obtained.

First, when the fastener is inserted into the floor mold, the fastening portion is caught and fixed to the bottom of the floor mold, so that the hollow reinfusing device of the present invention can be installed and disassembled by one-touch operation. Therefore, the binding operation of the present invention can be completed at the upper part of the bottom mold, thereby improving workability and economical efficiency.

Second, since the hollow reinforcement device according to the present invention fixes the hollow material between the lower and upper zones, it is possible to prevent the hollow material from rising due to buoyancy when the concrete is poured.

Third, if the length of the connector, the length of the connector, and the size of the hollow material fixture are changed, the slab of various thicknesses can be universally applied without changing the other structures.

Fourth, by forming the groove portion capable of placing the upper slab reinforcement on the upper surface of the upper earth region, the hollow reinfusing device of the present invention can simultaneously perform the role of the spacer.

Fifth, hollow material can be inserted into the inside of the slab to reduce its weight and weight, so that it can be easily applied to a long span structure.

1 is an exploded perspective view showing an embodiment of an apparatus for preventing buckling of the present invention.
2 is a sectional view showing a part of a slab provided with the hollow rebar preventing device of the present invention.
3 is an enlarged view of the portion 'A' in FIG.
4 is a perspective view showing another embodiment of the apparatus for preventing buckling of the present invention.
5 is a perspective view showing a slab in which the hollow rebar preventing device of the present invention is installed.
6 is an enlarged view of the portion 'B' in FIG.
7 is an exploded perspective view showing a coupling relationship between the lower portion of the hollow reinforcement device and the fastening portion of the present invention.
FIG. 8 is a perspective view showing various embodiments of the lower portion of the hollow rebar preventing device of the present invention. FIG.
9 is a cross-sectional view showing an apparatus for preventing buckling of the present invention applied to slabs of various thicknesses depending on the size of a connector.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

2 is a cross-sectional view showing a part of a slab provided with the hollow rebuffer preventing device according to the present invention, and FIG. 3 is a cross-sectional view taken along the line A ' As shown in FIG.

The present invention relates to a hollow rebar preventing device for preventing a hollow material (2) from rising due to buoyancy when a hollow concrete slab is poured in a hollow slab.

As shown in FIGS. 1 to 3, the present invention comprises a lower portion 10, which is installed on a floor molding 1 and supports a lower portion of the hollow material 2; A fastener 20 coupled to a lower portion of the lower portion 10 to be coupled to the lower portion of the floor form 1 and fixing the lower portion 10 to the floor form 1; A connector 30 coupled to the upper portion of the lower substrate 10; And an upper land 40 coupled to an upper portion of the connecting hole 30 to be spaced apart from the lower land 10 by a predetermined distance. And a hollow material 2 is positioned between the lower and upper ground zones 10 and 40.

That is, the apparatus for preventing buoyancy of hollow according to the present invention is composed of a lower portion 10, a fastener 20, a connecting portion 30 and an upper portion 40. The fastener 20 ).

The lower land portion 10 is located on the upper surface of the bottom mold 1 and supports the lower portion of the hollow material 2.

In FIG. 1, the lower portion 10 has a cylindrical shape having a circular cross section, but it can be formed into various sectional shapes such as a polygonal shape as in the embodiment of FIG. 8 to be described later.

The fastener 20 is coupled to the lower portion of the bottom plate 10 and is installed to protrude from the bottom of the bottom mold 1 through the bottom mold 1, .

The fastener 20 is received in the cylindrical fastener body 21 and the fastener body 21 so that one end of the fastener 20 protrudes outside the fastener body 21 due to the elastic force, As shown in Fig.

Therefore, when the fastener body 21 passes through the bottom mold 1 and protrudes to the bottom of the bottom mold 1, the fastener 22 protrudes outside the fastener body 21 by the elastic force, The position of the fastener 20 and the position of the lower support 10 are fixed.

As shown in FIG. 2, when the engaging portion 22 is formed in a triangular shape, the engaging portion 22 can easily pass through the mold along the inclined surface of the triangular shape.

The fastening tool 20 may be disassembled after demoulding the floor mold 1, or may be left as it is.

Further, in the present invention, a screw part 23 for piercing the floor molding 1 is integrally provided at the lower end of the fastener body 21. [

Thus, the screw portion 23 of the fastening tool 20 can be inserted into the floor mold 1 without rotating the bottom mold 10 by pivoting the upper end portion 10 of the upper mold.

When the screw part 23 is formed into a pointed shape having a smaller diameter toward the lower part, it is easy to penetrate the bottom mold 1.

2, the upper end of the fastener body 21 of the fastener 20 according to the present invention is provided with a head portion 24 having a thread on the outer circumferential surface thereof, Can be screwed into the engaging hole (12).

That is, although the fastener 20 can be directly coupled to the lower surface of the lower portion 10 using the adhesive member, the lower portion 10 and the fastener 20 can be screwed together.

To this end, a coupling hole (12) is formed at the lower end of the lower portion (10) and protrudes to the inside of the lower portion (10). The head portion 24 is formed in a shape corresponding to the coupling hole 12 so as to be fastened. The head portion 24 having a thread on the outer peripheral surface thereof is positioned at the upper end of the coupling hole 20. The head portion 24 of the fastening tool 20 is screwed into the fastening hole 12 of the lower portion 10 so that the fastening hole 20 can be firmly coupled with the lower portion.

When the head 24 of the fastening tool 20 is screwed to the fastening hole 12 of the lower support 10 as described above, the number of rotations of the head 24 is adjusted to change the coupling depth, It is possible to adjust the engaging portion 22 to be positioned in contact with the bottom surface of the bottom mold 1 regardless of the thickness of the mold 1. [

The coupling hole 12 of the lower portion 10 may be used as a hook for a hanger or the like even if the coupling hole 20 is later disassembled.

The connection port 30 is coupled to the upper portion of the lower portion 10 and is a portion where the hollow portion 2 is positioned between the lower portion 10 and the upper portion.

Therefore, if only the length of the connector 30 is changed according to the thickness of the hollow member 2, the present invention can be applied to slabs of various thicknesses without changing the remaining components. Therefore, unlike the conventional buoyancy prevention device, which has to be manufactured in a different size according to the thickness of the hollow slab, the present invention can be applied to slabs of various thicknesses, thereby enabling economical construction through mass production of products .

The upper land portion 40 is coupled to the upper portion of the connection port 30 at a predetermined distance from the lower land portion 10.

The upper land portion 40 holds the hollow material 2 at the upper portion of the hollow material 2 and accurately fixes the position of the hollow material 2 to prevent the hollow material 2 from rising due to buoyancy .

1 to 3, the present invention is characterized in that a hollow material fixture 50 for holding a hollow material 2 and holding the hollow material 2 is interposed between the lower and upper ground regions 10 and 40 .

As described above, the hollow re-buoyancy preventing device composed of the lower portion 10, the fastening portion 20, the connecting portion 30, and the upper portion 40 may be a ball type hollow structure using lightweight bodies such as styrofoam, And both hollow and tubular hollow members can be coupled through the connecting hole (30). When the hollow member 2 is coupled to penetrate through the connecting port 30, the hollow member 2 may be pre-assembled at the time of production of the hollow member re-buckling preventing apparatus of the present invention, 2), and the coupling port 30 and the upper land 40 are connected to each other.

Therefore, in order to solve this problem, it is possible to further include a hollow material fixture 50 that can cover the hollow material 2 in order to facilitate the coupling of the hollow material having a good hollow ratio.

The hollow material fixture 50 includes an outer tube 51 coupled to a lower portion and an upper portion of the upper portion of the outer tube 51 and an inner tube 51 having a smaller diameter than the outer tube 51, And hollow material inserting portions 53 are formed on both sides between the outer tube 51 and the inner tube 52 to insert the ends of the hollow material 2 in the tubular shape.

The end of the tubular hollow member 2 is connected to the inner and outer pipes 51 and 52. The end of the tubular hollow member 2 is connected to the inner and outer pipes 51 and 52, As shown in Fig.

In this case, a hollow material buoyancy preventing device in which a lower portion 10, a fastener 20, a connecting portion 30, an upper portion 40 and a hollow material fastener 50 are integrally formed is installed on the upper surface of the floor mold 1 Since only the end of the hollow material 2 is inserted into the hollow material inserting portion 53 after the construction, the hollow material 2 can be prevented from rising due to buoyancy, so that the construction is simple.

 3, the inner pipe 52 is formed to be longer than the outer pipe 51, and at least one of the inner ends of the outer pipe 51 and the outer end of the inner pipe 52, as shown in FIG. 3, And at least one chamfer (54) is formed.

Since the end portion of the hollow material 2 is inserted along the inclined surface of the chamfered portion 54 when the chamfered portion 54 is formed inside the end portion of the outer tube 51 or the end portion of the inner tube 52, Insertion is easy.

In addition, in the present invention, a serrated engaging protrusion 55 is formed to be inclined inward on at least one of the inner surface of the outer tube 51 or the outer surface of the inner tube 52 of the hollow material insertion portion 53 do.

The engaging protrusion 55 prevents the end of the inserted hollow tubular member 2 from escaping easily.

4 is a perspective view showing another embodiment of the apparatus for preventing buckling of the present invention.

The present invention is characterized in that one open side of a tubular cover member 60 having one side opened and the other side closed is inserted into one of the hollow member inserting portions 53 and coupled thereto.

4, when the cover member 60 is positioned at the end of the hollow member 2, it is possible to prevent the concrete from being inserted into the hollow member 2 at the end of the hollow member 2 when the concrete is poured.

FIG. 5 is a perspective view showing a slab provided with the apparatus for preventing buckling of the present invention, and FIG. 6 is an enlarged view of a portion 'B' of FIG.

5 and 6, the upper reinforcing bar 3 of the slab is positioned above the hollow material 2. [

The upper reinforcing bars 3 can be positioned in the grooves 41 by forming the grooves 41 in which the upper reinforcing bars 3 of the slab are placed on the upper land 40 in one or two directions .

In this case, since the upper reinforcing bar 3 fixes its position on the groove 41, the hollow reinforcement device of the present invention performs the role of the spacer at the same time.

FIG. 7 is an exploded perspective view showing the coupling relation between the lower portion 10 and the fastening 20 of the hollow rebar preventing device of the present invention. FIG. Fig. 3 is a perspective view showing an embodiment.

As described above, in the present invention, the fastener 20 may include a fastener body 21 and a fastener 22. The screw part 23 is positioned at the lower end of the fastener 20 and can easily penetrate the floor mold 1. The head part 24 is located at the upper end of the fastener 20, Can be screwed together.

In the present invention, the lower portion 10 may have a circular shape in cross section as shown in FIG. 8 (b), but may have a polygonal cross section as shown in FIG. 8 (a).

When the end portion 10 of the base 10 is formed in a polygonal shape, the base portion 10 can be firmly held by the tool. When the screw portion 23 is punched through the bottom mold 1, This is easy.

As shown in FIG. 8 (b), the base unit 11 may be further provided at a lower portion of the base 10 to protrude outside the base 10.

In order to stably support the hollow member 2 according to the present invention, the size of the lower portion 10 should be increased. However, when the size of the lower portion 10 is made larger than a certain size, there is a cost burden such as an increase in raw materials, a problem of weighting of the product, difficulty in inserting the fastener 20 through rotation of the lower portion 10, It is desirable to stably support the hollow member 2 by providing the base portion 11 with the lower bottom surface of the lower portion 10 being enlarged.

In addition, since the lower portion 10 can be used universally for slabs of various thicknesses, it is not necessary to thicken the lower portion 10 until the slab thickness is small. Therefore, in the present invention, the base portion 11 can be provided to stably support the hollow member 2 even when the connection hole 30 is long because the slab thickness is thick.

8 (c), a polygonal tool insertion groove 13 is formed at the center of the upper end of the lower portion 10.

In the present invention, it is possible to rotate the lower portion 10 by connecting an electric drill D or the like to the tool insertion groove 13. In this case, the engagement hole 12 may be formed in the bottom surface of the tool insertion groove 13. [ have.

9 is a cross-sectional view showing an apparatus for preventing buckling of the present invention applied to slabs of various thicknesses depending on the size of the connector 30.

9 (a) to 9 (c), in the present invention, by adjusting the length of the connector 30 and the size of the corresponding hollow material fixture 50, A hollow re-buoyancy preventing device of the present invention can be applied.

1: floor mold 2: hollow material
3: upper reinforcing bar 10:
11: base portion 12: engaging hole
13: tool insertion groove 20: fastener
21: fastener body 22:
23: screw part 24: head part
30: connection 40: upper land area
41: groove portion 50: hollow material fastener
51: Appearance 52: Inner pipe
53: hollow member insertion portion 54: chamfer
55: latching protrusion 60: cover member
D: Drill

Claims (13)

A lower land portion 10 installed on the bottom mold 1 to support a lower portion of the hollow material 2;
A fastener 20 coupled to a lower portion of the lower portion 10 to be coupled to the lower portion of the floor form 1 and fixing the lower portion 10 to the floor form 1;
A connector 30 coupled to the upper portion of the lower substrate 10; And
An upper land 40 coupled to the upper portion of the coupling 30 at a predetermined distance from the lower land 10; Respectively,
A hollow material (2) is positioned between the lower part (10) and the upper part (40)
And a hollow material clamping device (50) for clamping the hollow material (2) and fixing the position of the hollow material (2) is further provided between the lower and upper ground zones (10, 40).
delete The method according to claim 1,
The hollow material fixture 50 includes an outer pipe 51 and a plurality of inner pipes 52 which are smaller in diameter than the outer pipe 51 in the outer pipe 51. The outer pipe 51 is connected to the lower portion 10 and the upper portion 40, And a hollow material inserting part (53) for inserting an end of the tubular hollow material (2) is formed at both sides between the outer pipe (51) and the inner pipe (52) .
The method of claim 3,
An inner pipe 52 of the hollow material fastener 50 is formed to be longer than the outer pipe 51 and a chamfer 54 is formed on at least one of the inner side of the outer pipe 51 and the outer side of the end of the inner pipe 52 Wherein the hollow reinforcement member is a hollow member.
The method of claim 3,
Characterized in that a serrated engaging projection (55) is formed inwardly on at least one of the inner surface of the outer tube (51) or the outer surface of the inner tube (52) of the hollow material insertion portion (53) Device.
The method of claim 3,
And the open end of the tubular cover member (60) having one side opened and the other side closed is inserted into one of the hollow member inserting portions (53).
The method according to claim 1,
The fastener 20 is housed in the cylindrical fastener body 21 and the fastener body 21 and has one end projecting outwardly of the fastener body 21 by the elastic force, And an engaging portion (22) which engages with the engaging portion.
8. The method of claim 7,
And a screw part (23) for drilling the bottom mold (1) is integrally provided at the lower end of the fastener body (21).
9. The method of claim 8,
Wherein the lower land portion (10) has a polygonal cross section.
The method according to claim 1,
Further comprising a base portion (11) projecting outwardly from a side surface of the lower portion of the lower portion of the lower portion (10).
8. The method of claim 7,
The upper end of the fastener body 21 of the fastener 20 is provided with a head 24 having a threaded portion formed on an outer circumferential surface thereof and is screwed to the fastener 12 formed at the lower end of the lower portion 10. [ Hollow rebound prevention device.
12. The method of claim 11,
Wherein a polygonal tool insertion groove (13) is formed in the upper center of the lower portion (10).
The method according to claim 1,
Wherein a groove portion (41) on which the upper reinforcing bars (3) of the slab is placed is formed in one direction or in two directions on the upper part of the upper land (40).

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