KR101909351B1 - Fabricated type hollow body for hollow core slab - Google Patents

Abstract

The present invention relates to a hollow hollow body for a hollow slab, which can be produced at a low cost by an injection molding method instead of a blow molding method, can be assembled to a required size required by different construction sites, It is possible to maximize the hollow ratio and not to be deformed by the pressure at the time of pouring the concrete, and to keep the structure firmly semi-permanently even after the concrete curing, ); A rear shell 200 fitted to the front shell 100 in a state where the outer shell is in contact with the front shell 100 and having four connecting arms 212, 214, 216, and 218 in the vertical and horizontal directions; And a core 300 that penetrates through the front shell 100 and the rear shell 200 to integrally connect and supports the load inside the hollow body 1 connected thereto.

Description

{Fabricated type hollow body for hollow core slab}

The present invention can be produced at low cost by an injection molding method instead of the blow molding method, can be freely assembled to a required size required in different construction sites, and can precisely maintain the gap between the unit hollow bodies accurately So that it is possible to maximize the hollow ratio and not to be deformed by the pressure at the time of pouring the concrete, and to maintain the structurally rigid state semi-permanently even after concrete curing.

Recently, various methods have been put into practice to increase the strength of the slab by increasing the thickness of the slab or to hollow the slab by installing the slab in the slab in order to improve the weight and the sound insulation performance.

Such a hollow core slab has a hollow structure or a lightweight structure at the center. It reduces the weight of the concrete and reduces the weight of the slab and has a relatively excellent sectional performance. Such a hollow slab has a long span, And flatslab, which is advantageous to reduce the interlayer noise.

In the prior art related to the present invention, a lightweight module for a hollow slab, which is blow molded or foam molded as in Patent Document 1, is disclosed, which is formed by foaming a large-sized styrofoam light body inside a mold.

The half shell element for manufacturing the hollow body of Patent Document 2 is a hollow body manufactured by an injection molding method. However, the half shell element is formed by a method in which the rims of the upper and lower shells are detachably coupled to each other, There is a disadvantage in that the strength against compression load is low.

The hollow lightweight body module of Patent Document 3 is composed of a lightweight body having upper and lower openings and hollow portions formed therein and upper and lower portions of the lightweight body and a lid covering the hollow portion. There is a problem in that the strength is low.

In the case of the hollow lightweight body according to the above-mentioned patent documents, in the case of Patent Document 1, a large foam molding equipment is required, and since the volume thereof is excessively large, the cost for storing and transporting the foam is large, In the case of Patent Documents 2 and 3, injection molding is performed to complete the assembly, but the durability against compressive load is lowered. Thus, there is a limit in assembly to a size required in various construction sites.

Korean Registered Patent No. 10-1059840 (registered on August 22, 2011) Korean Patent Laid-Open No. 10-2012-0096105 (published on Aug. 29, 2012) Korean Registered Patent No. 10-1621770 (Registered May 11, 2016)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an injection molding machine which can be manufactured at low cost by injection molding rather than blow molding, And can maintain the gap between the unit hollow bodies precisely and is not deformed by the pressure at the time of pouring the concrete, and also can be used as a hollow slab having an improved structure that can maintain a structurally solid state even after application of external load after concrete curing To provide a hollow body for assembly.

According to an aspect of the present invention, there is provided an oven comprising: a front shell; A rear shell fitted to the front shell in a state in which the outer shell is in contact with the rear shell and having four connecting arms in longitudinal and lateral directions; And a core which penetrates through the front shell and the rear shell to integrally connect and supports the load inside the connected hollow body.

In a preferred embodiment, the front shell and the rear shell are alternately formed with radial bones and mountains so as to have a shell-like shape for the purpose of improving the compressive strength.

In addition, a core hole for coupling the core is formed at a central portion of the front shell and the rear shell, the core hole of the front shell is formed in the form of a keyhole, the tip of the core is formed in a cross- And the core hole of the rear shell is formed in a circular shape, and a male screw portion is formed at the rear end of the core, and the tightening nut is fastened to the male screw portion so as to be assembled.

In a preferred embodiment, the connection arm formed on the rear shell has a U-shaped cross section with an opened upper surface, the heat arm in the 0-degree direction and the 90-degree direction is male, And a plurality of hollow bodies are vertically and horizontally coupled to each other in a male and female coupling manner, and the male and female connecting arms are provided with a release preventing jaw and a release preventing groove, respectively.

According to the embodiment of the present invention, since both the front shell and the rear shell and the core are formed by injection molding, it is possible to manufacture the injection molding equipment with a small size compared to the blow molding method, , It can be stored and transported in small volume until assembly and can be assembled continuously in longitudinal and transverse directions, so that it can be assembled in various sizes required in various construction sites and can be delivered. The front shell and rear shell Since the core is inserted in the inside with its structural strength, it is not deformed by the pressure of the concrete because of its excellent compressive strength, and it is possible to connect the unit shells so that the gap between the unit shells is tight, It is possible to improve the efficiency of the system.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an assembled hollow body unit for a hollow slab according to an embodiment of the present invention,
FIG. 2 is a front shell perspective view of the assembled hollow body shown in FIG. 1,
Fig. 3 is a front shell rear perspective view of the assembled hollow body shown in Fig. 1,
FIG. 4 is a rear shell perspective view of the assembled hollow body shown in FIG. 1,
FIG. 5 is a rear shell plan view of the assembled hollow body shown in FIG. 1,
FIG. 6 is a perspective view of the core of the assembled hollow body shown in FIG. 1,
7 is an exploded perspective view of the core shown in Fig. 6,
8 is a sectional view taken along the line A-A 'in Fig. 6,
9 is a sectional view taken along the line B-B 'in Fig. 6,
10 is a plan view showing a connection state of the assembly type hollow body unit,
11 is a bottom view showing the connection state of the assembly type hollow body unit.

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

1 to 11 show an assembled state of the assembled hollow body 1 according to an embodiment of the present invention and a hollow body unit U in which the unit hollow bodies 1 are vertically and horizontally connected, Each component is shown.

As shown in the figure, the assembled hollow body 1 according to the present embodiment includes a front shell 100 in the form of an empty container;

A rear shell 200 fitted to the front shell 100 in a state where the outer shell is in contact with the front shell 100 and having four connecting arms 212, 214, 216, and 218 in the vertical and horizontal directions;

And a core 300 that penetrates through the front shell 100 and the rear shell 200 to integrally connect and supports the load inside the hollow body 1 connected thereto.

The front shell 100, the rear shell 200 and the core 30 are all manufactured by injection molding and assembled into a hollow unit U that can be installed inside the slab as shown in FIG. .

In the hollow body unit U of the embodiment shown in FIG. 1, three unit hollow bodies 1 are connected in the vertical and horizontal directions, so that a total of nine unit hollow bodies 1 form one hollow body unit U However, the present invention is not limited to this, and the number of the unit hollow bodies connected in the vertical and horizontal directions can be increased or decreased as needed.

First, in the present embodiment, the front shell 100 and the rear shell 200 are alternately formed with corrugated shells such as shells in the radial direction to improve the compressive strength of the front shell 100 and the rear shell 200, In order to prevent deformation such as crushing due to various external forces including compressive force of concrete, even when the slab is formed to have a thin thickness, the contact area with the concrete forming the slab is maximized to improve the strength of the slab will be.

2 and 3, the front shell 100 is formed in the form of a vessel having a top surface 110 and a side surface 120, the bottom surface of which is open, A core hole 111 for coupling with the core 300 is formed at the center of the upper surface 110.

A central portion of the upper surface 110 of the front shell 100 is generally flat and a rim extending radially outward of the upper surface 110 is formed in a radial direction.

The core hole 111 is formed as a kind of a keyhole in order to easily fasten the core 300 in a pivoting manner. The expansion part 111b having a radius expanded outside the central circular hole 111a is a And is formed in a symmetrical state at an angle of 180 degrees.

Reference numeral 114 denotes a circular reinforcing rib formed between the central portion and the outer periphery of the upper surface 110.

A coupling portion 122 for fitting with the rear shell 200 is formed to have a relatively small thickness around the lower end of the side surface 120 of the front shell 100, A step 124 for limiting the depth is formed.

4 and 5, the rear shell 200 is formed in the form of a relatively flat container as compared with the front shell 100, and four connecting arms 212, 214, 216, Are integrally formed.

The rear shell 200 also has a bottom surface 210 and a side surface 220. The bottom surface 210 is formed with a core hole 211 for coupling the core 300. The core hole 211 Are formed in a garden form.

A coupling portion 222 for coupling the coupling portion 122 formed at the lower end of the side surface 120 of the front shell 100 is formed around the upper end of the side surface 220 of the rear shell 200.

The coupling part 222 is formed by folding the outer and inner sides of the coupling part 222 so that the coupling part 122 of the front shell 100 is fitted therebetween. So that an empty space is formed inside the front and rear shells 100 and 200.

The connecting arms 212, 214, 216, and 218 formed at the four sides of the rear shell 200 have a U-shaped cross section with an opened upper side. The heating arms 212 and 214 in the 0 degree direction and the 90 degree direction are male, The heating arms 216 and 218 in the direction of arrows are formed in a female shape corresponding to the male type so that a plurality of hollow bodies 1 can be coupled to each other in longitudinal and lateral directions in a male and female coupling manner. The separation preventing claws C and the separation preventing grooves D are formed respectively so that they can be prevented from being pushed or released even when they are subjected to a compressive force in the vertical and horizontal directions or a tensile force in the combined state.

As shown in FIGS. 6 to 9, the core 300 is formed with a locking piece 310 such that the distal end thereof has the same cross-sectional shape as the key, a male threaded portion 320 is formed at the rear end thereof, And fastening nuts 330 are fastened to the front and rear shells 320 and 320 to engage with the core holes 111 and 211 of the front shell 100 and the rear shell 200, respectively.

The engaging pieces 310 at the distal end of the core 300 are fitted to the extended portion 111b formed in the core hole 111 of the front shell 100 and then engaged by rotating the core 300 by 90 degrees And a circular flange 312 is formed at a rear portion of the retaining piece 310 so as to be hooked around the inner surface of the core hole 111 of the front shell 100.

A circular flange 322 is formed on the front side of the male threaded portion 320 at the rear end of the core 300 so as to be caught around the inner surface of the core hole 211 of the rear shell 200.

A flange 332 is formed on the outside of the tip of the tightening nut 330 to be fastened to the male threaded portion 320 at the rear end of the core 300 so as to be closely attached to the outer surface of the core hole 211 of the rear shell 200 And the tightening nut 330 is formed with a radial ridge 334 so that it can be tightened by hand.

In the present embodiment, the core 300 has a structure in which the parts 300a and 300b formed in half in the longitudinal direction are integrally assembled. This is because the coupling between the elastic hook 302 and the hook groove 304 So that they can be made integral.

In the assembled hollow body of the present embodiment having the above-described structure, a plurality of unit hollow bodies 1 are continuously connected in the longitudinal and transverse directions as in the connection state diagram shown in FIGS. 1, 10, and 11 to fabricate the hollow unit U It can be assembled and delivered in various sizes as required by the construction site, and each part can be mass-produced at low cost by injection molding. It can be fastened by hand without using a separate tool. The unit hollow body can be easily unitized by fastening the nut and the unit hollow body vertically and horizontally. In addition to the reinforcement structure such as the shell and shell of the front and rear shells, It is not deformed by the pressure and external load of the concrete which is made by the concrete. Since there is the advantage that can improve the rate of the hollow inside the slab.

C: Chin D: Home
U: Hollow body unit 1: Prefabricated hollow body
100: front shell 110: upper surface
111: core hole 111a: circular hole
111b: extension part 120: side
122: engaging portion 124:
200: rear shell 210: bottom surface
211: core hole 212, 214, 216, 218:
220: side surface 222:
300: core 300a, 300b: core part (half type)
302: elastic hook 304: hook groove
310: latching piece 312: circular flange
320: male thread portion 322: circular flange
330: tightening nut 332: flange
334: Friction projection

Claims (8)

A front shell in the form of an empty container;
A rear shell fitted to the front shell in a state in which the outer shell is in contact with the rear shell and having four connecting arms in longitudinal and lateral directions;
And a core that penetrates through the front shell and the rear shell to integrally connect and supports the load inside the connected hollow body,
The front shell, the rear shell, and the core are both formed by injection molding. A core hole for coupling the core is formed at the center of the front shell and the rear shell, and the core hole of the front shell is formed as a keyhole The core of the rear shell is formed in a circular shape. A male thread portion is formed at the rear end of the core. The male thread portion of the core is inserted into the male thread portion, And the fastening nut is engaged with the fastening nut.
delete delete delete delete The method according to claim 1,
The connecting arm has a U-shaped cross section with an opened upper surface, and the heating arms in the 0-degree direction and the 90-degree direction are male-type, and the 180-degree and 270-degree heating arms are female Wherein the hollow bodies of the hollow bodies are coupled to each other in longitudinal and transverse directions in a male-female coupling manner.
The method of claim 6,
Wherein the male and female connecting arms are formed with a separation preventing jaw and a separation preventing groove, respectively.
The method according to claim 1,
Wherein the core is formed by integrally assembling parts formed by half in the lengthwise direction of the hollow body.

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