KR101726779B1

KR101726779B1 - Fastening Device for Preventing the Buoyancy of Hollow Body for Hollow Slab

Info

Publication number: KR101726779B1
Application number: KR1020150181069A
Authority: KR
Inventors: 허병욱; 박상기; 양관섭; 김경우
Original assignee: 한국건설기술연구원
Priority date: 2015-12-17
Filing date: 2015-12-17
Publication date: 2017-04-26

Abstract

The present invention relates to an apparatus for preventing buoyancy of a hollow body for a hollow slab, wherein the hollow slab structure is fixed to a formwork, a lower reinforcing bar and a formwork horizontally installed on a formwork, and a lower reinforcing bar is inserted A socket formed with slits in four directions, and a hollow body connected to the socket to prevent noise due to the formation of hollows in the interior thereof and to prevent movement due to buoyancy. Therefore, it is possible to prevent the hollow body from being lifted by the buoyancy due to the socket by fixing the socket and the hollow body to each other. Also, since the reinforcing bars are inserted and fixed in the inside of the socket, it is possible to control the spacing and position of the reinforcing bars on the formwork.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buoyancy preventing device for a hollow slab,

The present invention relates to an apparatus for preventing buoyancy of a hollow body for a hollow slab, and more particularly, to a buoyancy prevention apparatus for a hollow body for a hollow slab capable of preventing a buoyancy phenomenon of a hollow body, .

The wall structure of the apartment house is superior to the floor impact, workability and economical efficiency, but is relatively disadvantageous to the heavy impact sound due to the large influence by the vibration of the vertical member (wall). In addition, the laminated structure is advantageous for heavy impact sound because of reduction of vibration caused by reduction of vertical members and flexural rigidity of beams, but it is often disadvantageous to increase of floor height, workability and economy. In addition, the flat plate structure is advantageous for the reduction of floor height, variability and long span. However, since the details of the structure for securing the vibration performance due to long span, the weight of the bottom plate and the shearing performance are complicated, Is rather disadvantageous.

In recent years, various methods have been put into practice to increase the strength of the building by increasing the thickness of the slab to increase the height of the building or to secure a spacious living room, or to hollow the inside of the slab in order to improve the weight and sound insulation performance .

This hollow core slab has a hollow structure or a lightweight structure embedded in the center of the hollow slab, which reduces the weight of the panel and reduces the weight of the slab and has a relatively excellent sectional performance. Such a hollow slab has a long span The advantages of the flatslab are advantageous for reducing the interlayer noise.

Generally, a hollow slab is installed at a site in the form of a slab formwork, the formwork is supported by a supporting member such as a horseshoe, a slab bottom reinforcing bar and a lower wire mesh are disposed on the slab formwork, a hollow body is placed on the lower wire mesh, The upper wire mesh and the upper reinforcement are placed on the sieve, and then the slab concrete is installed.

However, in the case of the hollow slab, the buoyant force of the hollow body to float over the surface of the concrete acts strongly due to the difference in density between the hollow body and the concrete at the time of pouring concrete, and the hollow slab is liable to be defective due to such buoyancy .

Accordingly, in the construction of the conventional hollow slab, a hole is formed in the slab formwork at the site to fix the lower wire mesh to the slab formwork, and the upper wire mesh and the lower wire mesh are fixed by bonding wires in the field, There is a problem that much time and effort are required for the fixing work for preventing buoyancy of the hollow body.

In addition, there is a method of fixing a hollow body by using an anchor. In this method, since the connecting body is required to be installed for each hollow body, there is a problem that the workability is lowered.

And the buoyancy prevention device using the deck plate and the Half PC slab are practically difficult to apply to domestic wet apartments.

Japanese Patent No. 3734001 (registered on October 28, 2005) Japanese Registered Utility Model No. 3008074 (Registration date: December 14, 1994) Korean Patent Publication No. 2014-0142910 (published on December 15, 2014) Korean Patent Laid-Open Publication No. 2015-0073421 (published on July 01, 2015)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to prevent a hollow body from being lifted due to buoyancy by a socket by connecting and fixing a die and a hollow body. It is also an object of the present invention to provide a buoyancy prevention device for a hollow body for a hollow slab capable of adjusting the spacing and fixing the position of a reinforcing bar on a form by inserting and fixing the reinforcing bars in the socket.

According to another aspect of the present invention, there is provided an apparatus for preventing buoyancy of a hollow body for a hollow slab, A lower reinforcing bar horizontally installed on the formwork; A socket fixed to the die and having slits in which the lower reinforcing bars are inserted so that the lower reinforcing bars intersect with each other in four directions; And a hollow body that is connected to the socket to prevent noise from being generated due to hollows formed inside and prevent buoyancy from moving.

In embodiments of the present invention, the socket may further include fixing means protruding from the die to fix the die, the socket being coupled to the socket, wherein the socket has a connection groove through which the fixing means is inserted, And is coupled with the fixing means.

In the embodiments of the present invention, a plurality of sockets are arranged on the form depending on the position and the interval at which the lower reinforcing bars are installed, thereby performing a space maintaining function.

In the embodiments of the present invention, the hollow body is formed with a coupling groove for fitting the socket into the hollow body from the lower end face thereof while being inserted into the hollow body.

In the embodiments of the present invention, the connector may further include connecting means formed on the lower end surface of the hollow body and having a fastener for slidingly fitting the outer surface of the socket into the socket.

According to another aspect of the present invention, there is provided an apparatus for preventing buoyancy of a hollow body, which comprises a die, a lower reinforcing bar provided horizontally on the die, and a hollow body having a hollow inside to suppress interlayer noise, Wherein the slit is formed in four directions in which the lower reinforcing bar is inserted so that the lower reinforcing bar intersects the inside of the mold, and the hollow body is connected and fixed by the bucket so that the hollow body is moved by buoyancy And a socket for preventing an electric shock.

According to the buoyancy prevention device for a hollow body for a hollow slab as described above, the following effects can be obtained.

First, according to the present invention, it is possible to prevent the hollow body from being lifted due to buoyancy by the socket by fixing the socket and the hollow body to each other.

Secondly, according to the present invention, the reinforcing bars are inserted and fixed in the sockets, so that the spacing and position fixing of the reinforcing bars on the formwork can be performed.

Third, the present invention is characterized in that the reinforcing bars are inserted and fixed at the inner surface of the socket and are fastened to the hollow body at the outer surface of the socket, so that the ease and efficiency of fastening are high, Cost and time can be significantly reduced.

1 is a view for explaining an anti-buoyancy device for a hollow body for a hollow slab according to embodiments of the present invention;
FIGS. 2A and 2B are views for explaining an operation in which the socket shown in FIG. 1 is fixed to a mold
3 is a view for explaining a state in which a reinforcing bar is inserted and fixed to the socket shown in Fig.
4 is a view for explaining an embodiment in which the socket and the hollow body shown in Fig. 1 are combined;

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention, and are actually shown in a smaller scale than the actual dimensions in order to understand the schematic structure.

Also, the terms first and second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a buoyancy preventing device for a hollow body for a hollow slab according to an embodiment of the present invention. FIGS. 2A and 2B are views for explaining an operation of fixing the socket shown in FIG. These are the drawings. FIG. 3 is a view for explaining a state in which a reinforcing bar is inserted and fixed to the socket shown in FIG. 1. FIG. 4 is a view for explaining an embodiment in which the socket shown in FIG. 1 and the hollow body are coupled.

1 to 4, an apparatus for preventing buoyancy of a hollow body for a hollow slab according to embodiments of the present invention includes a die 1, a hollow body 100, a socket 200, and a fixing means 300 .

Recently, a hollow slab technique used in floor finishing materials has a lower reinforcing bar (lower wire mesh) in an upper region of a form, and a hollow body between a lower reinforcing bar (lower wire mesh) and an upper reinforcing bar (upper wire mesh). If the slab concrete is placed in the above general hollow slab structure, the hollow body may float due to the buoyancy, resulting in an undesirable result of the floor finish.

According to embodiments of the present invention for solving this problem, the buoyancy prevention device for a hollow body for a hollow slab is fixed on a formwork (1) through a fixing means (300). At this time, the sockets 200 can be arranged at a plurality of points at which the lower reinforcing bar 10 should cross in a mesh form. The socket 200 is fixed to the die 1 via the fixing means 300 at every position where the lower reinforcing bar 10 crosses.

The socket 200 has a slit structure for inserting the lower reinforcing bars 1 therein. Accordingly, since the lower reinforcing bar 1 is inserted into the socket 200 and then fixed therein, the installation position of the lower reinforcing bar 1, the mounting direction, and the spacing between the reinforcing bars can be accurately installed without any additional work.

The hollow body 100 has a structure of fitting with the outer surface of the socket 200. Specifically, the hollow body 100 may be coupled in such a manner that a coupling groove provided therein is fitted to a hook provided on an outer side surface of the socket 200, or a coupling groove formed on an outer side surface of the socket 200 In a manner to be fitted to a hook provided on the hook. Since the hollow body 100 is coupled to the socket 200 through the fitting operation and the socket 200 is fixed to the die 1 through the fixing means 300, There is a fixed effect. Even when the slab concrete is poured, the hollow body (1000) is fixed to the formwork (1), so that the buoyancy phenomenon can be prevented from occurring.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The hollow body 100 according to the embodiments of the present invention is a hollow structure in which the hollow hollow structure is positioned between the lower reinforcing bar 10 and the upper reinforcing bar (not shown) in the hollow slab structure to reduce the weight of the entire slab . Therefore, it is combined with the socket 200 located below to prevent buoyancy from being generated due to the light weight of the hollow body 100. For example, as shown in FIG. 1, the hollow body 100 is provided with a coupling groove 140 formed by being drawn inwardly from a lower end face thereof. The diameter of the fastening groove 140 is formed to be larger than the diameter of the socket 200 because the fastening groove 140 must be engaged with the outer surface of the socket 200 through a sliding operation. Since the hollow body 100 is fastened to the hook 240 provided on the outer surface of the socket 200 in a manner that the hollow body 100 is engaged with the hook 240, .

In another embodiment of the present invention, the buoyancy preventing device for a hollow body may further include connecting means 150 protruding from the lower end surface of the hollow body 100 to engage with the socket 200. The diameter of the socket 200 is formed to be larger than the diameter of the socket 200 and the length of the hook 240 of the socket 200 A fastening member for fastening is provided. In addition, after the connecting means 150 is positioned on the socket 200, the socket body 200 can be easily coupled with the socket 200 only by pressing the hollow body 100 from the top to the bottom. Particularly, since the hollow body 100 is protruded from the lower end surface of the connecting means 150, the fitting operation of the hollow body 100 in accordance with the socket 200 can be easily performed.

In yet another embodiment of the present invention, the hollow body 100 may have one hollow structure, and may be divided into a lower unit 110 and an upper unit 120 . In order to prevent the effect of preventing the interlayer noise from being reduced by vacuum at a specific wavelength band (63 to 125 Hz) owing to the hollow of the hollow body 100, the lower unit 110 and the upper unit 120, And a buffer layer 130 made of a buffer material. Since the hollow body 100 provided with the buffer layer 130 can prevent the interlaminar noise with respect to most wavelength bands, the effect of the hollow slab is further improved.

In addition, at least one unit of the lower unit 110 and the upper unit 120 of the hollow body 100 may have a structure in which the hollow space is spatially separated from the diaphragm. Accordingly, the strength of the hollow body 100 is increased by the diaphragm, and when the hollow body 100 is pressed on the upper body, the strength of the hollow body 100 is weakened when bonded to the socket 200, thereby preventing the hollow body 100 from being damaged.

The socket 200 according to the embodiments of the present invention is connected to the hollow body 200 through the fitting engagement with the coupling groove 140 or the coupling means 150 of the hollow body 100. The socket 200 includes a hook 240 formed on the outer surface of the socket body 210 for the upper fitting.

In addition, the socket 200 has a slit 230 in which an upper portion of the socket body 210 is opened. The lower reinforcing bar 10 is inserted through the slit 230 of the socket 200 so that the slit 230 is opened thicker than the thickness of the lower reinforcing bar 10. [ In the embodiments of the present invention, since the lower reinforcing bar 10 must intersect within the socket 200, four slits 230 formed at different positions of the socket 200 are formed. In particular, it is preferable that the four slits 230 are formed at an angle of 90 degrees with respect to each other so that the lower reinforcing bars 10 cross each other at right angles. Since the lower reinforcing bar 10 is cross-fixed in the socket body 210 of the socket 200, the lower reinforcing bar 10 can be inserted into the slot 200 of the socket 200 without time- The spacing and the position between the lower reinforcing bars 10 can be accurately determined by inserting the reinforcing bars into the reinforcing bars 230 only.

Further, the socket 200 is coupled with the fixing means 300 located below through the connection groove 220 formed in the lower end surface. If the fastening means 300 is a threaded bolt, the connecting groove 220 may be formed to a depth such that all of the fastening means 300 can be inserted, or only a portion of the fastening means 300, Or may be formed in a hole shape.

The fixing means 300 according to the embodiments of the present invention includes a lower holding portion 310 inserted and fixed in the fastening hole 2 formed in the die 1 and a fastening portion 320 fastened to the socket 200 . It will be appreciated that any structure is possible if the bottom support 310 of the securing means 300 can only be fixed at a specific location on the form 1, such as by an adhesive system, a welding system, or a fastening system. It is to be noted that any structure can be used as long as the fastening portion 320 of the fastening means 300 protrudes from the formwork 1 and is coupled to the socket 200. However, the screw 200 may be screwed, fitted, welded or otherwise coupled with the bottom surface of the socket 200 or with other areas of the socket 200, , Adhesive bonding, and the like can be applied.

In the embodiments of the present invention, since the fixing means 300 protrudes upward and the socket 200 is to be coupled to the top, the screw thread is shown as an example. As another example, the socket 200 and the fixing means 300 may be fixed to each other by a hook coupling in which the socket 200 and the hollow body 100 are combined.

As described above, the fixing means 300 is located in a specific area (position where the socket is to be fastened) of the mold 1, the socket 200 is engaged with the fixing means 300 in the region where the fixing means 300 is located, The lower reinforcing bar 10 is inserted into and fixed to the inside of the socket 200 at an area where the socket 200 is coupled with the fixing means 300 The mold 1 and the hollow body 100 are finally combined in a manner that the hollow body 100 is coupled.

Therefore, since the hollow body 100 is fixedly coupled with the formwork 1, the buoyancy phenomenon will not occur when the slab concrete is buried in the subsequent construction step. When the lower reinforcing bar 10 is inserted into the slit 230 of the socket 200, the installation position of the lower reinforcing bar 10 and the gap between the adjacent lower reinforcing bars 10 are determined, so that the reinforcing bar construction time can be reduced . Further, since the socket 200 is fixed to the fixing means 300 protruding from the specific area on the form 1 in the previous step, the socket 200 is easily installed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

1: Form 10: Lower reinforcing bar
100: Hollow body 110: Lower unit
120: upper unit 130: cushioning material
140: fastening groove 150: connecting means
200: Socket 210: Socket body
220: connection groove 230: slit
240: Hook 300: Securing means
310: lower support portion 320: fastening portion

Claims

Form;
A lower reinforcing bar horizontally installed on the formwork;
And a hollow body provided on an upper portion of the lower reinforcing bar and having a hollow inside to suppress interlayer noise,
And a socket fixed to the die and connecting the hollow body to the die to prevent the hollow body from moving due to buoyancy,
The socket
The slit having a shape that is open at the upper portion so that the lower reinforcing bar inserted at the upper portion intersects with the fixing means installed at the lower portion of the mold, And a hook is provided on an outer surface of the socket so that the hollow body surrounds the outer surface of the socket and is engaged with the socket.
The hollow body
And a cushioning layer made of a cushioning material for preventing noise between the upper and lower units is formed between the upper and lower cavities of the upper and lower units, And a fastening means having a shape corresponding to a hook of the hollow slab.

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The method according to claim 1,
Wherein a plurality of the sockets are arranged on the form according to a position and an interval at which the lower reinforcing bar is installed, thereby performing a spacing maintaining function of the hollow slab.

The method according to claim 1,
Wherein the hollow body is formed with a coupling groove for fitting the socket while the socket is drawn inwardly from the lower end face of the hollow body.

The method according to claim 1,
Further comprising connecting means protruding from a lower end surface of the hollow body and having a fastening member for slidingly engaging with an outer side surface of the socket when the hollow body is inserted into the hollow body.

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