KR101558533B1 - Form for concrete - Google Patents

Abstract

The present invention relates to a mold assembly easy to disassemble and, more specifically, to a mold assembly for a concrete structure such as a wall, a column, or the like in the construction of a building or the like. As a corner panel comprising a second fastening part including a non-contact flat part not in contact with a second protruding part protruding in the lateral direction from a first fastening part of a flat panel is introduced, a friction surface is minimized. At the same time, as a third protruding part protruding in the lateral direction from a first fastening part is in contact with a contact extending part extended in a longitudinal direction from the non-contact flat part, a part where panels are in contact with each other is formed in a part dislocated from each other, and thereby a friction force increased by lateral pressure is applied to only one part when a mold is disassembled. Therefore, panels are easily disassembled.

Description

FORM FOR CONCRETE < RTI ID = 0.0 >

The present invention relates to a mold assembly that is easy to disassemble,

And more particularly to a form assembly for a concrete structure such as a wall or a pillar during construction of a building or the like, which comprises a first projecting portion and a second projecting portion projecting laterally from the first fastening portion of the flat panel, The third projecting portion projecting laterally from the first engaging portion is in contact with the contact extending portion extending in the longitudinal direction in the non-contact flat portion, and the contact between the panels is minimized, The present invention relates to a mold assembly capable of easily disassembling panels because frictional force increased by side pressure acts on only one part when the mold is dismantled.

The formwork assembly used for the concrete structure is constructed by piling several panels to form a pouring space in which concrete is poured therebetween, curing the pouring concrete in the pouring space, and thereby constructing walls and pillars of the concrete structure.

The panel used in the building formwork assembly is used to easily assemble and disassemble the formwork from the early Bayer plywood panel, and various kinds of panels up to various improved panels typified by Euroform are known.

The direction of the change of the form panels has been variously improved in order to meet the trend of building of high-rise buildings and high-rise buildings, which are represented by apartment buildings and high-rise buildings.

Among the techniques related to the panel fixedly coupled to form the wall of the concrete structure therebetween, in the prior art related to the corner panel (member) installed at the corner, in particular, in the Utility Model No. 1995-0003711 (May 13, 1995) Assembly tear-off structure "

The design is to form a concrete structure wall by fixing the formwork by using a fixture and a hinge, so that it is possible to dismantle the fixture and the hinge during disassembly operation, There is a problem in that it is difficult to dismantle the panels due to the side pressure of the concrete even after disassembling the fixture and the hinge.

Another conventional technique for solving the above problems is a "mold insert molding frame" which is easy to connect with a U-shape, and is disclosed in Utility Model Registration No. 0241690 (July 26, 2001)

The inocainer frame of the present invention comprises a sidewall formwork and a ceiling plywood together with a concrete wall and a concrete ceiling, the incarer mold comprising a first sidewall corner portion extending from both adjacent sidewall molds and forming a right angle, And the first and second side wall corner portions and the first and second connecting plate portions protruding inwardly at right angles at the ends of the first side wall corner portion and the second side wall corner portion to be engaged with the both side wall formwork A lightweight metal post integrally formed with the entire sidewall height and manufactured by extrusion and having a plurality of wedge pin holes respectively formed in the first and second connecting plate portions; An upper plate and a lower plate respectively fixed to upper and lower ends of the struts; And a plurality of intermediate reinforcing members fixed to inner surfaces of the first side wall corner portion, the second side wall corner portion, the first coupling plate portion and the second coupling plate portion between the upper plate and the lower plate.

Another conventional technique is to present both inconelers and outcorner members. It has been proposed that the "architectural formwork" and the utility model registration No. 0357642 (July 20, 2004) "Inconel panel reinforcement structure" .

The designs are assembled so as to have two contact surfaces C1 and C2 at the joints of the inciner panel 2 and the flat panel 1 as shown in Figure 1, It is the method used.

However, when the formwork assembly is assembled as shown in FIG. 1, it is very difficult to disassemble the corner panel 2 and the flat panel 1 by increasing the side pressure in the inward direction with respect to the corner panel 2 with curing of the concrete (Co) Therefore, when the dismantling operation is performed through the detaching operation, the flat panel 1 or the inconel panel 2 or both of them are deformed or broken, There is a problem that the burden of repurchasing of the panel increases to the user.

Accordingly, the present invention has been made to solve the above-mentioned problems,

It can be applied to various formwork assemblies such as various wall form, column form, and box form with corner at the time of construction of concrete, so that after the curing of concrete, the formwork assembly can be easily and quickly processed to shorten the construction time and improve the convenience of the worker And a second fastening portion having a non-contact flat portion that does not contact the second projection provided on the first fastening portion of the flat panel, thereby minimizing the contact surface and eliminating the frictional force generated at the time of disassembly. The purpose is to provide.

In order to prevent deterioration of the quality of the concrete structure due to the deformation or breakage of the panels of the assembly when assembling the formwork or curing the concrete due to the contact portions only at the inner ends between the panels, And a flat panel including a first fastening portion having a third protrusion that is in contact with an outer surface of the flat portion, thereby providing a mold assembly that is easy to disassemble.

Further, the present invention can prevent the first fastening portion of the flat panel from being pushed or deformed by the side pressure caused by the concrete curing, and at the same time, the supporting force by the corner panel can be improved, And a contact extension portion for contacting and supporting the end portion of the third protrusion of the first coupling portion at an end portion of the second coupling portion of the corner panel so as to prevent the second coupling portion from being opened outward due to the pressing of the wedge when fastening, The present invention provides a mold assembly which is easy to dismantle.

In order to accomplish the above object, a mold assembly according to the present invention comprises:

A flat panel comprising a front supporting part for supporting one surface of the concrete pouring space and a first fastening part provided at both side ends of the front supporting part; And

 A corner panel including a bending support portion for supporting a corner portion of the concrete installation space and a second fastening portion provided at both side ends of the bending support portion and fastened to the first fastening portion; , ≪ / RTI >

Wherein the first fastening portion has a first projecting portion and a second projecting portion projecting laterally,

Wherein the second fastening portion includes a contact projection projecting laterally and contacting the first projection and a non-contact flat portion not contacting the second projection,

And a third protrusion protruding laterally from the second protrusion and contacting an end of the non-contact flat portion of the second protrusion, the first protrusion being in contact with the non-contact flat portion of the second protrusion,

And the flat panel and the corner panel can be easily disassembled.

Further, in the mold assembly according to the present invention, the second fastening portion of the corner panel includes a contact extension portion extending in the longitudinal direction from the inner side of the end of the non-contact flat portion and contacting the end of the third projection. .

The mold assembly according to the present invention introduces the corner panel having the non-contact flat portion to minimize the contact surface between the corner panel and the flat panel, thereby relieving the frictional force increased by the side pressure, thereby easily disassembling the mold assembly.

Further, since the contact portion of the flat panel and the corner panel is not located on the same line, the contact surface where the frictional force is generated exists only at the inner end of the panel, that is, So that the disassembly of the panels can be performed very easily.

The mold assembly according to the present invention introduces a flat panel including a third projection contacting the outer surface of the non-contact flat portion of the second fastening portion to prevent the shape of the panel from being deformed or broken due to an increasing side pressure while the concrete is cured In addition, when the panels are assembled, the third protrusion functions as a constraining means for evenly aligning the contact surfaces between the panels, so that no assembly line due to curing of the concrete occurs and a high quality concrete structure can be provided.

Further, since the mold assembly according to the present invention is provided with the contact extension portion which is in contact with and supports the end portion of the third projection of the first fastening portion at the end of the second fastening portion of the corner panel, It is possible to prevent the first fastening portion of the flat panel from being pushed or deformed and to improve the supporting force by the corner panel. In particular, when the fastening pin for joining the flat panel and the corner panel is fastened, It is possible to prevent the outer side from spreading.

In addition, the mold assembly according to the present invention instantaneously opens the contact portion between the panels through the extended projections, thereby temporarily removing the frictional force caused by the side pressure of the concrete, thereby easily performing the disassembly work.

In order to prevent the first fastening portion of the flat panel from being pushed or deformed by the lateral pressure caused by the concrete curing and to improve the supporting force by the corner panel, And a contact extension portion for contacting and supporting the end portion of the third projecting portion of the first fastening portion.

1 is a plan view of a conventional form assembly;
Figure 2 is a perspective view of a form assembly according to the present invention;
3 is a plan view of a form assembly according to the present invention;
Figures 4a and 4b are perspective and sectional views schematically illustrating the disassembly of a conventional mold assembly and a mold assembly according to the present invention.
5 is a view illustrating an installation example using a formwork assembly according to the present invention.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. 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.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

 In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, 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.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

In describing the mold assembly easy to be disassembled according to the present invention, if it is specified by reference to FIG. 2 that the approximate direction reference is not rigid for the sake of convenience, the direction in which the gravity acts is the downward direction and the up, .

In particular, if the direction is specified with reference to the lower plan view of Fig. 2, concrete may be placed so that the surface contacting the panel is the inside or the front and the opposite direction is the outside or the back, In particular, in explaining the structure of the panels, the inner space formed by bending the fastening portions is defined as the inner side and the opposite direction is defined as the outer side, and in the detailed description of the invention and the claims Unless otherwise noted, directions are specified in accordance with these standards.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mold assembly which can be easily disassembled according to the present invention will be described with reference to the accompanying drawings.

2 and 3, the formwork assembly according to the present invention includes a front support portion 11 which is in contact with an outer side surface of a concrete (Co) to be laid, A flat panel 10 formed of a first fastening portion 12 having a first projecting portion 13 and a second projecting portion 14 and a bent portion 21A formed so as to be in contact with a corner portion of a concrete (Co) And a second fastening part 22 bent outward at both side ends of the bending support part 21 and fastened to the first fastening part 12. The corner fastening part 21 has a bent part 21, 20).

The length of the front support part 11 of the flat panel 10 may be variously formed according to the structure and width of the building and is a formwork assembly of all concrete structures having various sizes and heights. The flat panel 10 having the fixed front supporting portions 11 and the general panels formed in various sizes may be combined to form a form assembly.

Particularly, the present invention aims at minimizing and solving the increased frictional force due to lateral pressure during dismantling of a structure, thereby facilitating disassembly work,

When a panel assembly is disassembled in a plurality of panels, which are typically assembled in a square plate, the lateral pressure acting on the remaining panels is eliminated, thereby reducing or eliminating frictional forces acting between the panels So that the embodiments described below can be applied to only some of the panels of the formwork assembly.

In addition, the flat panel 10 and the corner panel 20 have a height corresponding to the height of the concrete structure to be built, and in particular, the corner panel 20 has an angle corresponding to the angle of the corner portion to be constructed.

Here, the height corresponds to the height of the entire concrete structure when the height of the entire concrete structure is 2 m, or the height of the panels is equal to or unequally divided (for example, 1 m or 0.5 m) , And the panels having the divided lengths can overlap each other along the height direction of the structure to function as a structure assembly.

It is preferable that the flat panel 10 and the corner panel 20 are made of aluminum in order to obtain a lightening effect and durability at the same time. In this case, aluminum panels do not cause corrosion, , It is possible to use it repeatedly, and even if it is discarded, it can be extruded again and reused.

In some cases, the panels may be made of a synthetic resin material. In this case, since the micropores are formed by molding the synthetic resin mixed with the foaming agent on the central part, the lightening effect can be obtained,

It is preferable that the outer part is formed of a synthetic resin which is not mixed with a foaming agent or mixed with a small amount, and has a dense and rigid nature of the particle composition.

Further, it is preferable that the flat panel 10 and the corner panel 20 are integrally extruded (or injection molded) to reduce manufacturing costs.

As shown in FIG. 3, the flat panel 10 includes a first fastening part 12 bent outward at both side ends of the front supporting part 11,

The first fastening portion 12 is formed to have two contact portions, that is, a first projection portion 13 and a second projection portion 14, for fastening with common conventional panels,

It is possible to prevent the deformation due to curing of concrete and to prevent a gap between the first projection 13 and the second projection 14 through engagement with a general panel or the corner panel 20 It is preferable to use a tool for forming and disassembling or assembling (for example, a presser foot (so-called paruru)).

The first protrusion 12 is protruded laterally at a bent portion where the first fastening portion 12 and the front support portion 11 are connected to each other. The second protrusion 13 is formed on the outer surface of the first fastening portion 12, And is protruded laterally from the end portion.

The first protrusion 13 and the second protrusion 14 form a flat contact surface and are in close contact with the general panel or the corner panel 20 during tightening to prevent leakage of the concrete.

As described above, the corner panel 20 is bent at a predetermined angle about the bent portion 21A. The inner and outer surfaces of the bent portion 21A are rounded, It is desirable to ensure easiness of manufacturing at the time of molding (or injection) molding and at the same time to ensure smooth separation work of the corner panel 20 from the cured concrete (Co).

Meanwhile, the panels are spaced apart from each other by a predetermined distance, and a space therebetween is used as a concrete installation space. In FIG. 3, the opposite panels are not shown for convenience of explanation.

As shown in FIG. 3, among the panels spaced apart at the predetermined intervals, the flat panels 10 are provided with spacing devices that penetrate the panels so as to effectively resist the side pressure of the concrete.

Wherein the gap holding device comprises a support rod embedded in concrete and having a screw portion at both end portions thereof and an exposure member penetrating from the outside of the flat panel to the screw portion of the support rod, Thereby preventing the panels facing each other from being opened due to the lateral pressure during concrete curing.

Various types of spacing devices are known in addition to the spacing devices of the type shown in the drawings, and such spacing devices are not relevant to the essential features of the present invention, and thus a detailed description thereof will be omitted.

The first fastening part 12 of the flat panel 10 is provided with fastening holes 17 (see FIG. 2) for fastening with other panels along a vertical direction at predetermined intervals,

It is possible to fix the formwork assembly by using the fastening pin 30 and the wedge 36 through the fastening hole 17.

It is a matter of course that a corresponding fastening hole corresponding to the fastening hole 17 is also formed in the second fastening portion 22 of the corner panel 20. [

The fastening pin 30 for assembling the flat panel 10 and the corner panel 20 has a narrowed portion 31 and a head portion 31 for preventing detachment after being inserted into the fastening hole to facilitate insertion of the fastening hole. (32), and a wedge powder (36) insertion hole (33) inserted to secure a firm fastening force after insertion.

3, an inner end portion of the second fastening portion 22 of the corner panel 20 is provided with a contact protruding portion 12a which can be in tight contact with the first protruding portion 13 of the flat panel 10, (23).

As shown in FIG. 1, the panels 1 and 2 of the conventional form assembly are provided with a pair of protrusions 1A, 1B, 2A and 2B, The inner contact surface C1 and the outer contact surface C2 are generally formed on the upper surface of the panel and the panels are assembled so as to have two contact surfaces, As you can see,

As shown in FIG. 4A, when the two contact surfaces C1 and C2 are formed, the width of the frictional force increase due to the increase of the side pressure becomes very large,

4A, when the upper part of the general panel 1 is pressed in the outward direction to partially disassemble the first panel 1, the first protrusions 1A of the general panel 1 (C3) is again brought into contact with the second projecting portion 2B (see Fig. 1) formed on the general corner panel 2, which results in a very long disassembling operation time and a decrease in work efficiency.

3 and 4B, the present invention is characterized in that the inner contact projection 23 used originally in the second fastening part 22 of the corner panel 20 is provided, and on the outer end in the opposite direction, 2 projecting from the outer side contact portion 12 of the flat panel 10 by introducing the corner panel 20 including the second fastening portion 22 having the contactless flat portion 24 not in contact with the projecting portion 14 (Contact C3) generated in the disassembly operation of the conventional form assembly even when the upper part of the flat panel 10 is disassembled by a predetermined angle depressing method at the time of disassembly, Reference) is not generated, so that the disassembly operation can be performed very easily.

Also, in the conventional form assembly, the same or similar frictional force is maintained from the initial disassembly to the completion of the disassembly by the second friction (C3), even though the disassembling operation proceeds, and the operation time is increased,

In order to solve this problem, the pressing force for dismantling is maintained at a predetermined strength or more, and the dismantling operation is performed. Therefore, the panel is deformed or damaged due to the pressure, There is a problem of increasing the repetition burden.

However, according to the present invention, as compared with the frictional force generated during the initial disassembly operation through the non-contact flat portion 24, the frictional force is reduced as the contact area is reduced as the disassembly operation progresses. Therefore, It is possible to prevent the breakage and increase the reuse ratio of the panel, thereby ultimately reducing the construction cost to the contractor.

3, since the space S is formed by the non-contact flat portion 24, when the wedge of the fastening pin is pressed or the side pressure is externally applied between the panels, The second fastening portion 22 of the flat panel 10 or the first fastening portion 12 of the flat panel 10 may be deformed,

In order to prevent the above-described problems, the first fastening part 12 of the flat panel 10 of the present invention is formed in the second projecting part 14 so as to protrude laterally from the second fastening part 22, And a third protrusion 15 contacting the end 24A (outer surface) of the base 24.

The third protrusion 15 comes into contact with the end portion 24A of the non-contact flat portion 24 to generate a frictional force against the pressure that causes deformation of the first and second fastening portions, Or the first fastening portion 12 is prevented from being deformed,

Since the third projections 15 are formed in the outward direction in which the third projections 15 are disassembled during the disassembly or disassembly operation of the flat panel 10, disassociative counter force due to frictional force is not generated,

The lower end of the third protrusion 15 is supported by the outer surface of the non-contact flat portion 24 and functions as a supporting point of the attracting lever so that the lower end of the third protrusion 15 can be disassembled The work can be smoothly carried out.

The third protrusions 15 protrude from the outer surface of the non-contact flat portion 24 to oppose the external force acting on the corner panel 20 when the concrete Co is poured, The mutual binding force between the panels can be increased.

Next, the present invention is characterized in that it is formed on the second fastening portion 22 of the corner panel 20 in the longitudinal direction at the inner side surface of the end portion of the non-contact flat portion 24 and is provided at the end portion of the third projecting portion 15 And a contact extension portion 24A that is in contact with the contact portion.

Therefore, as the contact extension portion 24A supports the third projection 15 in the lateral direction, the pressure due to the pressing of the wedge 36 or the pressure of the flat panel 10 on the concrete during the fastening of the fastening pin 30 The first fastening portion 12 or the second fastening portion 22 can be prevented from spreading in the lateral direction.

Further, since the third projecting portion 15 is in contact with the contact extending portion 24A only at the side of the end portion thereof, frictional force does not act strongly when the form assembly is disassembled, so that it does not affect the detachment of the flat panel 10, Since the axis at which the first projection 13 and the contact projection 23 are in contact with each other and the axis at which the third projection 15 and the contact extension 24A are in contact with each other are not formed in the same line, The first protrusion 13 is not in contact with the second fastening portion 22 of the corner panel when the panel 10 is detached, so that the disassembling operation of the former can be easily performed.

3, the auxiliary protrusion 12a is formed on the outer surface of the first fastening portion 12 of the flat panel 10 in the lateral direction, and the first and second protrusions 12a, (13) and (14).

It is preferable that at least one auxiliary protrusion 12a is provided between the first and second protrusions 13 and 14 according to the length of the first fastening part 12.

The present invention reinforces the rigidity of the first fastening part 12 through the auxiliary projecting part 12a to prevent the first fastening part from being deformed by the side pressure of the concrete.

This is because the second projections 14 are not contacted with and supported by the non-contact flat portions 24 and the rigidity of the second projections 14 may be weakened because the thickness of the first fastening portions 12 through the auxiliary projections 12a Thereby making it offset.

The first fastening part 12 of the flat panel 10 according to the present invention is formed in the second fastening part 14 of the flat panel 10 so as to extend in the longitudinal direction of the first fastening part, And an extension protrusion (16) capable of relieving the pressure received from the concrete (Co) by opening a contact part when dismantling the concrete (20).

That is, when the form assembly is dismantled, the extending projection 16 is instantaneously pressed toward one side of the side surface of the flat panel 10 to momentarily move the frictional force acting on the contact surface of the first projecting portion 13 and the contact projecting portion 23 The dismounting operation can be easily performed by disassembling and separating the flat panel 10.

As described above, since the flat panel 10 is a synthetic resin material and can assure a certain amount of elastic force, it is possible to solve the frictional force by pressing the extended protrusion 16.

Further, the expression of opening the contact portion is an expression that the contact portion is finely dropped by momentary pressurization, so that the right of the present invention should not be interpreted excessively literally.

Therefore, the present invention can utilize the inciner panel and the flat panel in all parts where the corners are provided in the concrete structure, so that the building construction time can be greatly shortened and the use is convenient.

An example of installation that is applied to the corner portion wall shown in Figs. 2 to 4 and a different installation example is shown in Fig.

5A is a plan view of the formwork assembly 100A (column form) for a column, and concrete is placed in an inner space surrounded by the panels to complete the column.

5B is a side view of the box formwork assembly 100B to form a box-type concrete structure outside the illustrated formwork assembly. For convenience of explanation, the formwork assembly for an external box is shown in FIG. And only the mold assembly for the inner box is shown as a representative.

5A, a flat panel 10, a corner panel 20 'and a general panel 4 are assembled on the outside with a concrete installation space in which a column is to be formed.

In this case, unlike the form assembly 100 shown in FIG. 2 to FIG. 4, the mold assembly 100A is installed in the [A] of FIG. 5 while surrounding the out corner of the column, 20 ') has a contact support portion that is rounded (or bent) inward to abut on the outcorner portion, and the second fastening portion is bent outward at both side ends of the contact support portion.

5A, the flat panel 10 is assembled between the general panels 4 in a state where the corner panels 20 'and the general panel 4 are connected to each other, And the gap maintaining device.

Here, as described above, the nature of the flat panel 10 generally refers to a panel that is in contact with a flat surface such as a wall in a panel used as a formwork assembly, and the specific configuration of the flat panel 10 is generally used The present invention is also applicable to the general panel 4 as described above.

Therefore, it will be apparent to a person skilled in the art that the mold assembly of the present invention can be easily applied to the column foam 100A, and the interpretation of the right of the present invention should not be limited by such use.

Next, the box foam 100B shown in FIG. 5B is installed in a shape similar to the mold assembly 100 shown in FIGS. 2 to 4, so that the inner space of the box- All panels are installed to be interconnected and closed.

In this case, the inserter panel 20 shown in FIGS. 2 to 4 is positioned at the incinerator of the box-shaped structure to form the box foam 100B.

In particular, when the size of the box foam is large, the flat panel 10 can be fastened and assembled between the corner panel 20 and the general panel 4 and between the general panels 4, as shown in the figure.

Since the inner box foam is formed by placing the concrete in the outer side installation space, the side pressure of the concrete acts on the inner side of the structure, so that the interval maintenance device 40 is arranged in a diagonal cross- So as to counteract the side pressure of the concrete acting in the inward direction.

Although not shown in the drawing in addition to the spacing device 40 shown in the drawings, it should be understood that each flat panel 10 may be provided with other spacing devices between the flat panel 10 of the outer box foam .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And substitutions are to be construed as falling within the scope of protection of the present invention.

10: flat panel 11: front support
12: first fastening part 13: first protrusion
14: second projection 15: third projection
16: extending projection 17: fastening hole
20: corner panel 21: bending support
21A: bent portion 22: second fastening portion
23: contact projection 24: non-contact flat portion
24A: contact extension part
30: fastening pin 31:
32: head portion 33: insertion hole
34: Wedge powder

Claims (2)

delete A flat panel (10) comprising a front supporting part (11) for supporting one side of a concrete installation space and a first connection part (12) provided at both side ends of the front supporting part (11); And
A corner panel 20 comprising a bending support portion 21 for supporting a corner portion of the concrete installation space and a second coupling portion 22 provided at both side ends of the bending support portion 21 and fastened to the first fastening portion, ; , ≪ / RTI >
The first fastening portion 12 has a first protruding portion 13 and a second protruding portion 14 projecting laterally,
The second fastening part 22 includes a contact projection 23 projecting laterally and coming into contact with the first projection and a contactless flat part 24 not contacting the second projection,
And a third protrusion (15) protruding laterally from the second protrusion and contacting an end of the non-contact flat portion of the second fastener, the first protrusion (15) being connected to the first fastener (12)
And a contact extension part (24A) formed in the second fastening part (22) of the corner panel and extending in the longitudinal direction at an inner surface of the end part of the non-contact flat part and contacting the end part of the third projecting part ≪ / RTI >

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