KR102274188B1 - Frame member and formwork frame using the same - Google Patents

Abstract

The present invention relates to a frame member for a formwork and a formwork frame using the same, extrusion-molded to form a hollow part for core filling in the center of the inner side, and having at least one wedge pin fastening hole penetrating in the thickness direction, and a body for filling the core Including a core filled in the hollow portion, wherein the wedge pin fastening hole is punched sequentially by pressing the outer wall of the body, the core and the inner wall of the body in a state in which the core is filled in the hollow portion for filling the core. Provided is a frame member for a formwork that is light and has high structural rigidity and can be manufactured at low cost and a formwork frame using the same by making the periphery of the wedge pin fastening hole perforated in the outer wall recessed inwardly and compressed to the core by being formed.

Description

A frame member for formwork and a formwork frame using the same {Frame member and formwork frame using the same}

The present invention relates to a frame member for a formwork and a formwork frame using the same, and more particularly, it is light, has excellent structural rigidity, can be manufactured at low cost, can minimize noise during installation and dismantling, and has excellent durability. It is excellent and relates to a frame member for formwork that can improve the recycling rate and a formwork frame using the same.

In general, a formwork is a structure used to construct a concrete structure in a predetermined shape, and includes a frame and a panel attached to one side of the frame.

In this case, the frame is composed of an outer frame having a rectangular structure so as to stably support the panel, and an inner frame coupled to the inside of the outer frame.

The frame is manufactured using various materials such as wood, iron, aluminum, etc. The wooden frame is difficult to use repeatedly for a long time due to its weak durability, and the steel frame has excellent durability and can be used repeatedly several times, but the workability is poor due to its heavy weight. In order to compensate for the shortcomings of the wooden frame and the steel frame, an aluminum frame having a light weight and excellent strength has been developed and used.

On the other hand, the formwork frame must satisfy the KS standard no matter what material is applied. In order to pass the KS standard, if light and high-strength aluminum is used, the manufacturing cost rises, and the steel frame plywood increases the structural rigidity and lowers the manufacturing cost. When a hot-rolled steel material such as a formwork (KS 8006:2007) is used, the weight reaches about 20Kg (1,200mm in width*600mm in length*63.5mm in height), which makes industrial accidents easy to occur and workability is remarkably reduced. Therefore, it is required to develop a formwork frame that has structural rigidity that can meet KS standards, is light and inexpensive, and can also prevent an increase in fuel cost and environmental pollution.

For reference, the technology that is the background of the present invention is disclosed in Patent Publication No. 10-2015-0116373 (Title of the invention: a formwork frame of a hybrid structure for eco-friendly ultra-light noise and impact damping and a formwork using the same).

The present invention has been devised to solve the problems of the prior art, and it is possible to minimize noise generation and reduce weight while increasing structural rigidity at a low cost, as well as to have excellent durability and to increase the recycling rate. An object of the present invention is to provide a formwork frame using this.

As a means for solving the above technical problem,

The present invention is extrusion-molded to form a hollow part for filling the core in the inner center, the body having at least one wedge pin fastening hole penetrated in the thickness direction; and a core filled in the hollow portion for filling the core; wherein the wedge pin fastening hole includes an outer wall of the body, the core and an inner wall of the body in a state in which the core is filled in the hollow portion for filling the core. Provided is a frame member for a formwork, characterized in that the periphery of the wedge pin fastening hole punched in the outer wall is depressed inwardly and pressed against the core by being sequentially perforated by a press.

In this case, a hollow part for losing weight may be formed inside the upper and lower ends of the body.

In this case, a partition wall may be formed between the hollow part for filling the core and the hollow part for losing weight.

In this case, the core filled in the hollow part for core filling in the portion where the wedge pin fastening hole is formed may be made of a metal material.

In this case, a protective layer of weather resistance, corrosion resistance, and chemical resistance may be coated to protect the surface of the frame member for the formwork.

In this case, the core may be a solid core made of an aluminum alloy or a magnesium alloy.

In addition, the present invention is made of the frame member for the formwork, a pair of first external frame members disposed to face each other, and a pair of second external frame members disposed at both ends of the first external frame member, respectively. an external frame having; Corner brackets respectively disposed at the corners of the outer frame to connect the first outer frame member and the second outer frame member; and an inner frame coupled to the inside of the outer frame; provides a formwork frame comprising a.

In this case, the corner bracket has a body part and a pair of coupling parts extending vertically from the body part, and the coupling part is in the hollow part for filling the core of the first external frame member and the second external frame member. Each can be inserted.

In this case, the inner frame includes a plurality of first inner frame members connecting the pair of first outer frame members, and cross-coupled to the first inner frame member to connect the pair of second outer frame members. It includes a plurality of second inner frame members, and the first inner frame member installed in the middle among the plurality of first inner frame members may have a square tube or C-shaped steel shape.

In this case, the first inner frame member in the form of a square tube is made of steel and has a cross section of 50(51.5)mm*30(28.5)mm*1.8~2.5mm or 50(51.5)mm*50 It can be (48.5)mm*1.2~2.5mm.

In this case, the first inner frame member disposed at an end of the plurality of first inner frame members and the second inner frame member may have an isosceles L-shaped cross-sectional structure including a vertical portion and a horizontal portion.

In this case, the first inner frame member and the second inner frame member having the equilateral L-shaped cross-sectional structure are made of steel, and the cross section width, length, and thickness are 30(25)mm*50(51.5)mm*1.2~2.6 mm may be.

In this case, a fastening part bent outward or inwardly is formed at one end of the vertical part and the horizontal part, and the fastening part may be fastened to the outer frame by a rivet or a round head bolt.

In this case, the first inner frame member and the second inner frame member may be integrated by joining the intersecting portions by welding.

In this case, both ends of the core may be exposed outside the body, and the exposed both ends may be respectively inserted into and fastened to the corner brackets.

In this case, the corner bracket is a corner core insert made of urethane rubber, synthetic rubber, or metal including a groove into which the exposed end of the core is inserted, and a protrusion formed at the upper and lower portions of the groove to be inserted into the body, respectively. can

In this case, an inner corner bracket is disposed inside a corner of the outer frame, and the inner corner bracket and the outer frame may be fastened by rivets or round head bolts.

According to the present invention, the hollow part for core filling of the extruded hollow frame member made of an aluminum alloy or magnesium alloy is filled with a core made of wood or metal material to form a steel frame plywood form (width 1,200 mm * length 600 mm * height 63.5 mm). By lowering the weight to about 13kg, which is lighter than the weight (19.6kg), it is possible to improve workability, increase structural rigidity and minimize manufacturing cost.

In addition, since the wedge pin fastening hole for connecting the formwork and the adjacent formwork is formed in such a way that the wedge pin fastening hole is drilled by a press, the periphery of the wedge pin fastening hole is depressed inwardly during press drilling and is pressed against the core, thereby being between the outer frame and the core. It is possible to prevent moisture and moisture from penetrating into the core by maintaining the watertightness of the core.

In addition, hollow parts for slimming are formed inside the upper and lower ends of the frame member, and a partition wall is formed between the hollow part for core filling and the hollow part for slimming, thereby reducing material cost and improving structural rigidity as well as noise. can

In addition, the corner brackets for connecting the outer frame member and the adjacent outer frame member are coupled in such a way that they are inserted into the inner side of the outer frame member, thereby minimizing the torsion of the frame and increasing the assembly precision compared to the case of joining by welding. .

In addition, since the core inserted into the outer frame is made of a solid core made of aluminum alloy or magnesium alloy, noise generated during installation and dismantling of the formwork can be attenuated, and the recycling rate can be improved.

In addition, both ends of the core inserted into the hollow part for filling the core of the frame member are exposed outside the body, and the exposed ends are inserted into the corner core insert and fastened with rivets, round head bolts, etc. to prevent damage to the frame due to cracks. Durability can be improved.

1 is a perspective view of a formwork frame according to a first embodiment of the present invention;
Figure 2 is an exploded perspective view of the formwork frame shown in Figure 1;
3 is a cross-sectional view AA, BB, CC of FIG.
Figure 4 is a coupling structure of the body and the core of the outer frame shown in Figure 2;
5 is an enlarged view of part D of FIG. 2;
6 is a cross-sectional view of part D of FIG. 2;
7 is a view showing a modified example of the inner frame of the formwork frame shown in FIG.
8 is an enlarged view showing the coupling structure of the outer frame and the inner frame of the formwork frame shown in FIG.
9 is a cross-sectional structural view of the hot-rolled frame;
10 is a view showing the maximum displacement and maximum stress analysis results of the hot-rolled frame under static load;
11 is a view showing the maximum displacement and maximum stress analysis results of a hot-rolled frame under an impact load;
12 is a cross-sectional structural view of an extruded hollow frame;
13 is a view showing the maximum displacement and maximum stress analysis results of the extruded hollow frame under static load;
14 is a view showing the maximum displacement and maximum stress analysis results of the extruded hollow frame under an impact load;
15 is a view showing a bending test model of a formwork model to which an extrusion hollow frame is applied;
16 and 17 are views showing the analysis results of the amount of deflection of the formwork model to which the extrusion hollow frame is applied;
18 is a view showing transmittance measurement results for each panel;
19 is a view showing the test results of the number of times of exclusive use for each panel;
20a to 20c are views showing the deflection test results of the formwork;
21 is a view showing an assembly cross-section when the formwork of the extruded hollow frame is installed;
22 is a view showing the deflection CAE result of the extruded hollow frame shown in FIG. 21;
23 is an exploded perspective view of a formwork frame according to a second embodiment of the present invention;
24 is a coupling structure diagram of the body and the core of the outer frame shown in FIG. 23;
25 is an enlarged view of part E of FIG. 23;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms, and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Figure 1 is a perspective view of a formwork frame according to a first embodiment of the present invention, Figure 2 is an exploded perspective view of the formwork frame shown in Figure 1, Figure 3 is a cross-sectional view AA, BB, CC of Figure 2, Figure 4 is in Figure 2 The coupling structure diagram of the body and the core of the outer frame shown, FIG. 5 is an enlarged view of part D of FIG. 2, FIG. 6 is a cross-sectional view of part D of FIG. 2, and FIG. 7 is the inner frame of the formwork frame shown in FIG. A view showing a modified example, FIG. 8 is an enlarged view showing the coupling structure of the outer frame and the inner frame of the formwork frame shown in FIG.

1 to 8, the frame member for the formwork according to the first embodiment of the present invention is used as the outer frame 110 of the formwork frame 100, as shown in Fig. 3, the body 111 and It includes a core 112 .

The body 111 is extrusion-molded using an aluminum alloy or a magnesium alloy so that a hollow part 111a for filling the core is formed in the inner center. The body 111 has at least one wedge pin fastening hole 111c. The wedge pin fastening hole 111c is a hole for inserting a wedge pin used to connect a die and an adjacent die, and the outer and inner walls of the body 111 are penetrated in the thickness direction by press working. Here, the outer wall of the body 111 means a wall (right wall of the body in FIG. 3) disposed outside in the coupled state of the formwork frame 100, and the inner wall is a wall opposite to the outer wall (left side of the body in FIG. 3) wall), and is used hereinafter with the same meaning.

Specifically, after fixing the body 111 so that the inner wall of the body 111 is grounded on the die side of the press mold in a state in which the core 112 is filled in the hollow part 111a for filling the core of the body 111, press punch When pressed, the wedge pin fastening hole 111c is formed while the outer wall, the core 112, and the inner wall of the body 111 are sequentially perforated. In this case, since the inner wall of the body 111 is perforated while being fixed to the die side of the press mold, the periphery of the wedge pin fastening hole 111c maintains a flat surface after perforation, while the outer wall of the body 111 is the body 111 ), since it is perforated in a state supported by the core 112, which is weaker in strength than the core 112, the periphery of the wedge pin fastening hole 111c is depressed and bent inward after perforation and is pressed against the core 112 (see (c) of FIG. 3 ) and, thereby, the contact portion between the outer wall of the body 111 and the core 112 is not spaced apart and closely adhered, thereby maintaining watertightness.

The upper and lower ends of the body 111 are formed with a hollow portion (111b) for losing weight. The hollow part 111b for losing weight serves to reduce the production cost by making the formwork frame 100 lighter and saving materials by forming a part of the body 111 in a hollow structure. The formation position or number of hollow parts 111b for slimming may be appropriately adjusted within a range that does not reduce the structural rigidity of the formwork frame 100 . For example, in order to couple the panel 10, the corner bracket 120, the inner frame 130, etc., a hollow part 111b for losing weight is additionally formed in the stepped part 111d protruding from the upper and lower parts of the inner wall of the body 111. It is also possible to further lower the weight of the formwork frame 100 .

It is preferable that a partition wall (111e) is formed between the hollow part (111a) for filling the core and the hollow part (111b) for losing weight. In order to reduce the weight, it may be considered to fill the core 112 by forming the hollow part 111a for core filling and the hollow part 111b for thinning out as one hollow part without forming the partition wall 111e, but the partition wall 111e) Without it, the supporting force of the body 111 is weakened, and the structural rigidity is lowered, so it is difficult to obtain the expected performance.

The core 112 is inserted and filled into the hollow part 111a for filling the core of the body 111 to maintain rigidity while reducing the weight of the frame member for the formwork. Core 112 is the material of the body 111, that is, it is preferable to use wood lighter than metal, but the material of the body 111 is not limited to wood, and if it has a weight and strength similar to wood, other materials, For example, it should be understood that foamed/non-foamed plastics, FRP, sandwich structure panels, composite material sheets, etc. are of course applicable.

Meanwhile, a different material may be applied to the core 112 depending on the filling position. For example, as shown in FIG. 4 , a metal core 112a such as steel, aluminum alloy, or magnesium alloy is filled in the portion where the wedge pin fastening hole 111c is formed in the outer frame 110, and the other portions are The core 112b made of wood or the like described above may be filled.

That is, when the formwork frame 100 and the adjacent formwork frame are connected with a wedge pin or the like and concrete is poured, pressure is applied laterally to the outer frame 110 , and this causes the periphery of the wedge pin fastening hole 111c to be depressed or will be torn However, as in the present invention, when the metal core 112a having excellent strength is filled in the portion where the wedge pin fastening hole 111c is formed, the periphery of the wedge pin fastening hole 111c is reinforced by the metal core 112a and the concrete is poured. Even if it is, it will not be torn or dented.

In addition, the core 112 is not completely filled in the hollow part 111a for filling the core, but only in the area except for both ends of the hollow part 111a for filling the core (refer to FIG. 3 ). This is for insertion of the coupling portion 120b of the corner bracket 120 and will be described later in detail.

The frame member for formwork configured as described above may be coated with a protective layer having weather resistance, corrosion resistance, and chemical resistance on the surface for surface protection. For example, if the surface of the frame member for formwork is coated with a surface protection layer by spraying, powdering, dipping, etc. with weather-resistant, corrosion-resistant, chemical-resistant paint, etc., it prevents corrosion of the surface of the frame member for formwork, Not only can it be protected from strong alkaline concrete, etc., but also prevent moisture and moisture from penetrating into the contact portion between the wedge pin fastening hole 111c and the core 112 or the core 112 exposed at the wedge pin fastening hole 111c. can do.

The frame member for formwork according to the first embodiment of the present invention has been described above. Hereinafter, a formwork frame using such a frame member for formwork will be described.

The formwork frame 100 according to the first embodiment of the present invention includes an outer frame 110 , a corner bracket 120 , and an inner frame 130 .

The outer frame 110 includes the first outer frame member 113 and the second outer frame member 114 made of the frame member for the formwork described above. Two of the first outer frame members 113 are provided and disposed to face each other, and two second outer frame members 114 are also provided and disposed at both ends of the first outer frame member 113 . That is, the first outer frame member 113 and the second outer frame member 114 form a rectangular shape as a whole.

The corner bracket 120 connects and fixes the first outer frame member 113 and the second outer frame member 114 , and is installed at each corner of the outer frame 110 . As shown in FIGS. 5 and 6 , the corner bracket 120 includes a body portion 120a and a coupling portion 120b formed to protrude vertically from both ends of the body portion 120a. The coupling portion 120b is respectively inserted into both ends of the hollow portion 111a for filling the core of the outer frame 110 in which the core 112 is not filled, and in this state, a fastening means such as a rivet 122 or a round head bolt. is fixed using

When the first outer frame member 113 and the second outer frame member 114 are combined by configuring the corner bracket 120 in an insertion type, the conventional first outer frame member 113 and the second outer frame member 114 are Compared to the method of welding end corners, it is possible to minimize distortion of the frame, as well as to increase assembly precision, and to reduce maintenance costs because assembly and disassembly are easy. In order to further minimize the torsion of the frame, a separate inner corner bracket 121 is placed inside the corner of the outer frame 110, and a rivet 122 or a round head bolt together with the outer frame 110 and the corner bracket 120, etc. It is also possible to fix it with In the case of the inner corner bracket 121 , a bottom surface is provided at the bottom, and this bottom surface may be used for coupling with the panel 10 .

On the other hand, the corner bracket 120 may be made of any one or more selected from aluminum alloy, magnesium alloy, engineering plastic, high elasticity and high hardness urethane rubber, synthetic rubber, and metal, and the inner corner bracket 121 is a general structural rolled steel, It may be made of any one or more selected from stainless steel, aluminum alloy, and engineering plastics.

The inner frame 130 is made of any one or more materials selected from rolled steel for general structure, stainless steel, aluminum alloy, magnesium alloy, and composite material, and is coupled to the inside of the outer frame 110 .

Specifically, the inner frame 130 is cross-coupled to the first inner frame member 131 connecting the first outer frame member 113 to each other, and the first inner frame member 131 to form the second outer frame member 114 . ) and a second inner frame member 132 for connecting to each other.

The first inner frame member 131 and the second inner frame member 132 are preferably composed of at least two or more in order to improve the structural rigidity of the formwork frame 100 , and the size and use of the formwork frame 100 . It may be appropriately extended in consideration of the like. Here, a configuration in which the first inner frame member 131 and the second inner frame member 132 are each composed of three will be described as an example.

It is preferable that the first inner frame member disposed in the middle of the plurality of first inner frame members 131 has the shape of the square tube shown in FIG. 2 or the C-shaped steel shape shown in FIG. 7 . This is because, if the bearing capacity of the center part of the formwork is weak, a fullness phenomenon may occur during the curing process of concrete. By configuring the center of the formwork in the shape of a square tube or C-beam, the bearing capacity is improved to prevent the fullness phenomenon.

In this case, the first inner frame member 131 in the form of a square tube is made of steel, and has a cross section of 50(51.5)mm*30(28.5)mm*1.8~2.5mm or 50(51.5)mm in width, length, and thickness. It is preferable that it is *50(48.5)mm*1.2-2.5mm.

The first inner frame member and the second inner frame member 132 disposed at both ends of the plurality of first inner frame members 131 have a vertical portion 132a and a horizontal portion 132b to improve structural rigidity and reduce weight. ) may have an equilateral L-shaped cross-sectional structure (refer to FIG. 8). A fastening portion 132c is formed at one end of the vertical portion 132a and the horizontal portion 132b. The fastening portion 132c is formed by bending one end of the vertical portion 132a outward, one end of the horizontal portion 132b bent inward, and a rivet 133 in a grounded state with the inner circumferential surface of the outer frame 110 . Or it is fastened with a round head bolt. For reference, here, only the second inner frame member 132 has been described as an example, but the first inner frame member 131 also has an equilateral L-shaped cross-sectional structure including a vertical portion and a horizontal portion, and a fastening portion is formed at one end to form an external combined with the frame.

In this case, the first inner frame member 131 and the second inner frame member 132 having an isosceles L-shaped cross-sectional structure are made of steel, and the cross section width, length, and thickness are 30 (25) mm * 50 (51.5) It is preferable that it is mm*1.2-2.6mm.

As described above, when the first inner frame member 131 and the second inner frame member 132 have a square tube, C-shaped steel, or an isosceles L-shaped cross-sectional structure, and the width, length, and thickness of the cross-section are adjusted to a predetermined size, It is possible to lighten the total weight of the formwork frame 100 to a weight that is easy to work with, for example, 13 kg (hot rolled frame form: 19.6 kg, aluminum form: 15 kg width x length x height: 600x1,200x63.5mm).

On the other hand, the first inner frame member 131 and the second inner frame member 132 are fixed in such a way that the intersecting portions are joined by welding and integrated.

As described above, the frame member for the formwork according to the first embodiment of the present invention and the formwork frame using the same have been described. On the other hand, the deflection of the formwork must satisfy the KS standard. Hereinafter, the deflection performance of the present invention and the formwork according to the KS standard will be compared and described.

KS standard hot rolled frame

The cross-sectional properties and mechanical properties of the hot-rolled frame SPS-KOSA 0257-7079:2016 (refer to FIG. 9) according to the group standard established by the Korea Steel Association on August 12, 2016 [Table 1] and [Table 2] shown in In addition, Fig. 10 shows the maximum displacement and maximum stress analysis results of the hot-rolled frame under a static load, and Fig. 11 shows the maximum displacement and maximum stress analysis results of the hot-rolled frame under an impact load.

Extruded Hollow Frame

The cross-sectional characteristics and mechanical properties of the extruded hollow frame (see FIG. 12) according to the present invention are shown in [Table 3] and [Table 4] below. 13 shows the maximum displacement and maximum stress analysis results of the extruded hollow frame under a static load, and FIG. 14 shows the maximum displacement and maximum stress analysis results of the extruded hollow frame under an impact load.

Model Selection

Structural analysis of the formwork model having the performance as shown in [Table 5] below by applying the extruded hollow frame was performed. Based on the form deflection test of KS F 8006:2009, the bearing frame and the load-beam were designed, and the load-beam was controlled with the displacement control, and the amount of deflection when the applied force was 14,400N was measured and compared for each model.

Analysis result

The analysis was carried out in the same way as the KS standard, and the measurement site was also measured at the same place as the KS standard. The load was measured at the point A in FIG. 15 and the amount of deflection at the point B was measured at 14,400N.

As a result of model analysis of each 2 by 2 to 4 by 4 (the number of internal frame members), almost all models showed a deflection amount of 0.8 mm or less when 14,400N as shown in FIG. 16 . Since the standard deflection amount in the KS standard should be less than 1.4mm, it can be confirmed that the extruded hollow frame application form meets the KS standard as a result of analysis.

In addition, as a result of analysis from 2 by 2 to 4 by 4, it was determined that the part that affected the deflection amount was the outer frame, and the influence of the inner frame was insignificant (see FIG. 17 ).

Experimental example

noise measurement

Euroform, aluminum foam, and extruded hollow frame application form were applied 10 times each by applying force to a certain part of the external frame and panel part with a hammer and measuring decibels with a sound level meter, and the result (unit: decibel (dB)) ) is an average value and is shown in [Table 6] below.

From [Table 6], it can be seen that while the PP core inserted into the hollow part absorbs noise, less noise is measured compared to Euroform made of iron or aluminum foam made of only aluminum. Therefore, it can play a role in reducing the noise even a little in the noisy construction site.

permeation test

The transmittance of each panel was measured by measuring the foamed PP and PP honeycomb models for each thickness with transmittance equipment, and the results are shown in FIG. 18 . In the case of aluminum foam and Euroform, since the panel is made of aluminum and wood, it was not measured because it was not subject to measurement.

Specifically, the transmittance of 5t-thick foamed PP and PP honeycomb panels and 10t-thick foamed PP and PP honeycomb panels were measured, respectively. As can be seen in FIG. 18, the transmittance of 5t foamed PP was the best, and the 5t The transmittance of foamed PP and 10t PP honeycomb model showed similar values. 5t of foamed PP has the best transmittance, but 10t of PP honeycomb is preferable to withstand the stress of poured concrete.

Dedicated frequency test

The test was conducted for the exclusive number of times of the foamed PP panel and the PP honeycomb panel, which are candidates for the panel used for the foam and the extruded hollow frame application form, respectively. After mixing Remital and water (including additives) in a ratio of 4:1 to produce concrete, put concrete on Taigo plywood, aluminum panel, foamed PP panel, and PP honeycomb panel, then 24 hours, 48 hours, 72 hours A number of tests were carried out. In the case of aluminum panels and Taigo plywood panels at the construction site, a release agent is used after treatment during construction or reuse, but in this experiment, it was judged that using a release agent was incomparable. The experimental results are shown in [Table 7] and FIG. 19 below.

KS F 8006:2009 Formwork Deflection Test

A prototype was manufactured to determine the panel of the extruded hollow frame-applied formwork, and the deflection test of the formwork was performed using a large pressure bending tester. We compared representative aluminum foam and extruded hollow frame-applied formwork, and in the case of Euroform, face plate reinforcement test was conducted to compare each formwork, and to see if the extruded hollow frame-applied formwork shows the performance presented in the KS standard. was confirmed. For each of the aluminum foam and the extruded hollow frame application formwork, three formwork sag tests were performed, and in the case of Euroform, the face plate reinforcement deflection test was performed three times because there was no panel, and the results are shown in FIGS. 20a to 20c, respectively. It was.

Although there was no significant difference in the deflection test results of aluminum foam and extruded hollow frame-applied formwork, Euroform obtained a result that did not meet the KS standard. In addition, as a result of checking whether the extruded hollow frame-applied formwork, Euroform, and aluminum foam were damaged after the experiment, it was confirmed that the Euroform subjected to the face plate reinforcement test was damaged, and that there was no damage to the aluminum foam and extruded hollow frame-applied formwork. could check

As described above, the performance of the extruded hollow frame according to the present invention and the frame according to the KS standard was compared and described. As a result of the analysis of the formwork model to which the extruded hollow frame is applied, results corresponding to the KS standard were obtained, and it was confirmed that the deflection test had a greater effect on the outer frame than the inner frame. In addition, the extruded hollow frame-applied formwork has a strength close to that of aluminum foam, and the panel transmits light while making less noise compared to the existing formwork, allowing the operator to proceed with construction in an improved working environment. In addition, the number of recycling is also significantly higher than that of the existing formwork, so economic efficiency can be improved.

However, in the case of the extruded hollow frame, the amount of deflection was measured to be slightly less than the KS standard. To compensate for this, the thickness of the hollow part of the frame was increased by 1 mm on each side as shown in [Table 8] and FIG. 21 below. As a result, it was possible to obtain the same result as in FIG. 22, and in this case, it was confirmed that the amount of deflection was reduced by 25% or more.

As described above, the frame member for the formwork according to the first embodiment of the present invention and the formwork frame using the same have been described. Hereinafter, a frame member for a formwork according to a second embodiment of the present invention and a formwork frame using the same will be described with reference to the drawings.

23 is an exploded perspective view of a formwork frame according to a second embodiment of the present invention, FIG. 24 is a coupling structure diagram of the body and core of the outer frame shown in FIG. 23, and FIG. 25 is an enlarged view E of FIG. 23 .

The frame member for formwork and the formwork frame according to the second embodiment of the present invention are different from the first embodiment in the form and material of the core, and the coupling structure between the outer frame and the corner bracket, which will be described in more detail below.

23 to 25, the frame member for a formwork according to the second embodiment of the present invention is used as the outer frame 210 of the formwork frame 200, and includes a body 211 and a core 212 ( 24).

The body 211 is extrusion-molded using an aluminum alloy or a magnesium alloy to form a hollow part 211a for filling the core at the inner center, and has at least one wedge pin fastening hole 211b penetrating in the thickness direction. In this case, the wedge pin fastening hole 211b may be drilled using a press in the same manner as in the first embodiment.

The core 212 is inserted into the hollow portion 211a for filling the core of the body 211 . In this embodiment, the core 212 is configured in the form of a solid core made of an aluminum alloy or a magnesium alloy. In this configuration, although there is a disadvantage in that the manufacturing cost is increased compared to the first embodiment in which a core of wood, plastic, etc. and a metal core are mixed and used, better structural rigidity can be obtained and the recycling rate can be increased. it is preferable to have In addition, due to the noise canceling effect due to the gap between the body 211 and the core 212, the noise generated during installation or disassembly of the form can be lowered than that of the existing solid steel or solid aluminum frame, thereby minimizing the occurrence of civil complaints. In [Table 9] below, the characteristics of the frame member for formwork according to the first embodiment and the second embodiment are compared and shown.

TYPE
Item first embodiment
(Wood core + aluminum alloy core) second embodiment
(aluminum alloy solid core) outer frame Corner core insert for shock protection outer frame Corner core insert for shock protection weight 3.593kg/set 0.25kg/set 4.602kg/set 0.052kg/set(-480%) noise 82.24 83 raw material price 12,391 won/set KRW 14,573/set (+17.61%) vertical deflection 14,400N / 1.0 to 1.14 14,400N / 0.78 to 0.89 (+28%) Recycling rate (%) 50.00% 53.68% Recycling amount 6,206 won/set 7,823 won/set

The formwork frame 200 using the formwork frame member configured as described above includes an outer frame 210 , a corner bracket, and an inner frame 230 as in the first embodiment.

The outer frame 210 is made of the aforementioned frame member for the formwork, and has a shape in which the core 212 is longer than the body 211 . That is, both ends of the core 212 are exposed out of the body 211 by a predetermined length (see FIG. 25 ) in a state in which the core 212 is inserted into the core filling hollow portion 211a of the body 211 .

The corner bracket is for connecting the first outer frame member 213 and the second outer frame member 214 to each other, and in this embodiment, the corner bracket is made of a corner core insert 221 . The corner core insert 221 includes long hole-shaped groove portions 221a disposed perpendicular to each other on both sides, and protrusions 221b protruding laterally on upper and lower portions of the groove portion 221a.

Each of the exposed ends of the core 212 described above may be inserted into the groove portion 221a and fixed with a rivet 222 , a round head bolt, or the like. In this case, a separate inner corner bracket 223 is disposed inside the first outer frame member 213 and the second outer frame member 214 in a state where the end of the core 212 is inserted into the groove portion 221a, and , rivets 222, when fixed together with a round head bolt, etc., it is preferable to minimize the torsion of the frame. In addition, the protrusion 221b is inserted into the groove 211c formed in the upper and lower portions of the hollow portion 211a for core filling of the body 211 of the outer frame 210, thereby providing a more stable bonding force.

As described above, when the core 212 is formed longer than the body 211 and both ends of the core 212 are inserted and fastened to the corner core insert 221, the first embodiment, that is, the coupling part of the corner bracket 120 ( 120b) is inserted into the hollow part 111a for filling the core of the body 111 of the outer frame 110 and fastened, there is an advantage in that damage due to cracks can be prevented.

On the other hand, the corner core insert 221 can reduce noise during installation and dismantling of the formwork frame 100, prevent impact, and prevent stamping of the panel 10 during demolding and transportation, as well as when packing the formwork. It is preferably made of high-strength, high-elasticity urethane rubber or synthetic rubber to prevent slipping and industrial accidents, but, of course, it is also possible to use metal to improve strength.

The inner frame 230 includes a first inner frame member 231 connecting the first outer frame member 213 to each other, and the first inner frame member 231 cross-coupled to the second outer frame member 214 to each other. It includes a second inner frame member 232 for connecting, and is coupled to the inside of the outer frame 210 in the same manner as in the first embodiment.

In this case, the first inner frame member and the second inner frame member 232 disposed at both ends of the first inner frame member 231 have an L-shaped cross-sectional structure to enable weight reduction while improving structural rigidity, and the first inner The first inner frame member installed in the middle of the frame 231 has a square tube or C-shaped steel shape, and the first inner frame member 231 and the second inner frame member 232 are joined by welding at a crossed portion. , fixed and integrated.

As above, preferred embodiments of the present invention have been described in detail with reference to the drawings. The description of the present invention is for illustration, and those skilled in the art to which the present invention pertains will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning, scope, and equivalent concept of the claims are interpreted as being included in the scope of the present invention. should be

10: panel 100: formwork frame
110: outer frame 111: body
111a: hollow part for core filling 111b: hollow part for weight loss
111c: wedge pin fastening hole 111d: stepped part
111e: bulkhead 112: core
112a: metal core 112b: core
113: first outer frame member 114: second outer frame member
120: corner bracket 120a: body part
120b: coupling part 121: inner corner bracket
122: rivet 130: inner frame
131: first inner frame member 132: second inner frame member
132a: vertical part 132b: horizontal part
132c: fastening part 133: rivet
200: formwork frame 210: outer frame
211: body 211a: hollow part for core filling
211b: wedge pin fastening hole 212: core
213: first outer frame member 214: second outer frame member
221: corner core insert 221a: groove
221b: stone 222: rivet
223: inner corner bracket 230: inner frame
231: first inner frame member 232: second inner frame member

Claims (17)

a body having at least one wedge pin fastening hole extruded to form a hollow part for filling the core in the inner center, and having at least one wedge pin fastening hole penetrated in the thickness direction; and
a core filled in the hollow part for filling the core;
including,
The wedge pin fastening hole is formed by sequentially perforating the outer wall of the body, the core, and the inner wall of the body by a press in a state in which the core is filled in the hollow part for filling the core, whereby the wedge pin perforated in the outer wall The periphery of the fastening hole is depressed inwardly so that it is pressed against the core,
The core is a metal core made of steel, aluminum alloy, or magnesium alloy that is filled in the hollow part for core filling in the portion where the wedge pin fastening hole is formed, and the hollow part for core filling in the portion where the wedge pin fastening hole is not formed. and a core made of wood, foamed or non-foamed plastic, FRP, sandwich structure panel, or composite material sheet. The method of claim 1,
Frame member for formwork, characterized in that hollow parts for losing weight are formed inside the upper end and lower end of the body. 3. The method of claim 2,
Frame member for formwork, characterized in that the partition wall is formed between the hollow part for filling the core and the hollow part for losing weight. delete The method of claim 1,
A frame member for a form, characterized in that a protective layer of weather resistance, corrosion resistance, and chemical resistance is coated on the surface of the frame member for the formwork. delete A pair of first external frame members made of the frame member for formwork according to any one of claims 1 to 3 and 5 to face each other, and at both ends of the first external frame member, respectively. an outer frame having a pair of second outer frame members disposed thereon;
Corner brackets respectively disposed at the corners of the outer frame to connect the first outer frame member and the second outer frame member; and
an inner frame coupled to the inner side of the outer frame;
A formwork frame comprising a. 8. The method of claim 7,
The corner bracket has a body portion and a pair of coupling portions extending perpendicular to each other from the body portion, and the coupling portions are respectively inserted into the core filling hollow portions of the first outer frame member and the second outer frame member. A formwork frame, characterized in that. 8. The method of claim 7,
The inner frame includes a plurality of first inner frame members connecting the pair of first outer frame members, and a plurality of first inner frame members cross-coupled to the first inner frame member to connect the pair of second outer frame members. A formwork frame comprising two inner frame members, wherein the first inner frame member installed in the middle of the plurality of first inner frame members has a square tube or C-shaped steel shape. 10. The method of claim 9,
The first inner frame member in the form of a square tube is made of steel, and has a cross section of 50(51.5)mm*30(28.5)mm*1.8~2.5mm or 50(51.5)mm*50(48.5) The formwork frame, characterized in that mm*1.2-2.5mm. 10. The method of claim 9,
A first inner frame member disposed at an end of the plurality of first inner frame members, and the second inner frame member have an isosceles L-shaped cross-sectional structure comprising a vertical portion and a horizontal portion. 12. The method of claim 11,
The first inner frame member and the second inner frame member having the equilateral L-shaped cross-section structure are made of steel, and the cross section width, length, and thickness are 30 (25) mm * 50 (51.5) mm * 1.2 to 2.6 mm. Characterized formwork frame. 12. The method of claim 11,
A formwork frame, characterized in that a fastening part bent outward or inwardly is formed at one end of the vertical part and the horizontal part, and the fastening part is fastened to the external frame by a rivet or a round head bolt. 12. The method of claim 11,
The first inner frame member and the second inner frame member is a formwork frame, characterized in that the intersecting portions are joined by welding to be integrated. 8. The method of claim 7,
Both ends of the core are exposed outside the body, and the exposed both ends are respectively inserted into and fastened to the corner brackets. 16. The method of claim 15,
The corner bracket is a corner core insert made of urethane rubber, synthetic rubber, or metal including a groove portion into which the exposed end of the core is inserted, and a protrusion formed on the upper and lower portions of the groove portion to be inserted into the body, respectively. formwork frame. 16. The method of claim 15,
An inner corner bracket is disposed inside a corner of the outer frame, and the inner corner bracket and the outer frame are fastened by rivets or round head bolts.

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