WO2007011143A1

WO2007011143A1 - Non-welding type deck plate with truss girder and manufacturing method thereof

Info

Publication number: WO2007011143A1
Application number: PCT/KR2006/002798
Authority: WO
Inventors: Chean-Seop Byeon; Woo-Gil Kim
Original assignee: Winsteel Co., Ltd.
Priority date: 2005-07-15
Filing date: 2006-07-15
Publication date: 2007-01-25
Also published as: JP4777425B2; KR100658832B1; CN101268239A; JP2009508020A

Abstract

The present invention relates to a deck plate assembly with a truss girder attached integrally thereto and a method for manufacturing the same wherein in order for the truss girder to be fixed to a bottom plate, a coupling plate is attached to the lower portion of the truss girder and is fixedly coupled integrally to the bottom plate, such that no welded marks are formed on the bottom plate of the deck plate assembly, thereby obtaining better outer appearance effects. The non- welding type deck plate assembly with a truss girder attached integrally thereto includes: a coupling plate attached horizontally to the lower portion of the truss girder; and a bottom plate coupled integrally to the bottom surface of the coupling plate. The coupling plate and the bottom plate have compression protrusions formed at the positions corresponding to each other in such a manner as to make the inner peripheral surface of one side compression protrusion come into close contact with the outer peripheral surface of the other side compression protrusion.

Description

NON- WELDING TYPE DECK PLATE WITH TRUSS GIRDER AND MANUFACTURING METHOD THEREOF

Technical Field

[1] The present invention relates to a deck plate assembly with a truss girder attached integrally on the bottom plate thereof, and more particularly, to a deck plate assembly with a truss girder attached integrally thereto and a method for manufacturing the same wherein in order for the truss girder to be fixed to a bottom plate, a coupling plate is attached to the lower portion ofthe truss girder and is fixedly coupled integrally to the bottom plate, such that no welded marks are formed on the bottom plate of the deck plate assembly, thereby obtaining better outer appearance effects. Background Art

[2] Generally, deck plates, which are used in place of existing forms in constructing the slabs of a building, are materials for slabs that are made of a metal plate like a galvanized steel plate for the purpose of forming the structure after concrete casting, without any disassembling. If the slab is constructed by using the deck plates, there is no need for temporarily assembling and disassembling the slab, thereby reducing the period and costs consumed for construction and ensuring a given degree of quality of product. Based upon the above reasons, recently, the constructionof the slab structures by using the deck plates has been increasingly popular at the construction sites where steel-framed high buildings are constructed.

[3] Conventionally, various kinds of deck plate assemblies have been introduced and developed, and recently, since a truss deck plate assembly having a truss girder integrally attached on a generally flat bottom plate thereof for reinforcing the rigidity of the deck plate gives excellent advantages in view of the decrement of thickness of the slab and its structural performance, it is widely available in this industrial field. FIG.l is a perspective view showing representative one of conventional truss deck plate assemblies, and as shown, the conventional deck plate assembly includes a bottom plate 1 made of a metal plate in a given thickness for supporting the weight of concrete cast thereon and the construction load and a truss girder 2 fixedly attached on the top surface of the bottom plate 1 in a longitudinal direction of the deck plate assembly.

[4] On the other hand, a most general method forfixedly attaching the truss girder 2 on the top surface of the bottom plate l,when the conventional truss deck plate assembly is made, is embodied by means of spot- welding. In more detail, after the truss girder 2 is first mounted to a given position of the bottom plate 1, electrodes are placed on the top portion of a foot 2' of the trass girder 2 and the bottom surface of the bottom plate 1 and a large quantity of electric current is applied, such that the foot 2'of the trass girder 2 and the bottom plate 1 are mutually welded by the electricity resistant heat generated at their contacted points.

[5] By the way, the conventional trussdeck plate assembly is structured wherein the trass girder 2 is directly welded on the top surface of the bottom plate 1, and after completing the welding, thus, the welded marks undesirably exist on the bottom surface of the bottom plate 1. Therefore, since the convention deck plate assembly itself does not have beautiful outer appearances, it is not good for a material for finishing the ceiling of a structure so that it is difficult to be adopted in the places exposed to the outside. In this case, after the installing the deck plate assembly, ceiling painting or separate ceiling finishing is needed, which makes costs and time consumed additionally.

[6] So as to solve the problems caused by the welded marks, on the other hand, another method of applying paint on the bottom surface of the bottom plate after welding is ad- ditionallyconducted in the manufacturing steps of the deck plate assembly, but in this case, the product costs are increased due to the addition of the painting process. Therefore, the method also fails to suggest a perfect solution for the problems as mentioned above. Disclosure of Invention

Technical Problem

[7] Accordingly, it is an object of the present invention to provide a deck plate assembly with a trass girder attached integrally thereto and a method for manufacturing thesame wherein in order for the trass girder to be fixed to a bottom plate, a coupling plate is attached to the lower portion of the trass girder and is fixedly coupled integrally to the bottom plate, unlike existing methods wherethe trass girder is directly welded to the bottom plate, such that no welded marks are formed on the bottom surface of the bottom plate of the deck plate assembly, thereby preventing the painted or plated material from being damaged and also obtaining better outer appearance effects. Technical Solution

[8] To achieve the above object, according to one aspect of the present invention, there is provided a non-welding type deck plate assembly with a trass girder attached integrally thereto, including: a coupling plate attached horizontally to the lower portion of the trass girder; and a bottom plate coupled integrally to the bottom surface of the coupling plate. At this time, so as to achieve the integral coupling between the coupling plate and the bottom plate, the coupling plate and the bottom plate have compression protrusions formed at the positions corresponding to each other in such a manner as to make the inner peripheral surface of one side compression protrusion come into close contact with the outer peripheral surface of the other side compression protrusion.

[9] According to another aspect of the present invention, Also, there is also provided a method of manufacturing a non-welding type deck plate assembly with a truss girder attached integrally thereto including the steps of: (a) integrally attaching a coupling plate to the lower portion of the truss girder; (b) disposing the truss girder having the coupling plate attached thereto at a given position on a bottom plate; and (c) disposing a superposed portion of the coupling plate and the bottom plate between a punch having a protruded part formed on a pressuring surface thereof and a concave mold having a depressed part formed thereon, and pressing the coupling platen and the bottom plate by using the punch and the mold to have compression protrusions formed on the coupling plate and the bottom plate, such that the truss girder is fixedly attached to the bottom plate.

[10] According to the present invention, so as to attach the truss girder to the top surface of the bottom plate, the coupling plate as a separate member is attached integrally to the lower portion of the truss girder by means of welding, and at a state where the coupling plate is placed on the bottom plate, the coupling plate and the bottom plate are coupled integrally to each other, such that the truss girder can be fixedly mounted on the bottom plate through completely physical coupling, unlike existing deck plate assemblies where the foot portion of the truss girder is directly fixed to the bottom plate by means of spot-welding. Furthermore, accordingto the features of the present invention, when the truss girder is fixedly attached, the coupling plate as a separate member is adopted to couple the truss girder and the bottom plate with each other, such that since there is no need for direct welding of the truss girder to the bottom plate, no welded marks are formed on the bottom surface of the bottom plate, which perfectly overcomes the problems the conventional deck plate assemblies have had. Advantageous Effects

[11] According to the present invention, so as to fixedly attach the truss girder to the bottom plate in a deck plate assembly, a coupling plate is attached to the lower portion of the truss girder and is fixedly coupled integrally to the bottom plate, unlike existing methods where the truss girder is directly welded to the bottom plate, such that no welding spots are formed on the bottom surface of the bottom plate of the deck plate assembly, thereby preventing the painted or plated material from being damaged and also obtaining better outer appearance effects. Brief Description of the Drawings [12] FIG.1 is a perspective view showing a general conventional truss deck plate assembly;

[13] FIG.2 is a perspective view and a partly sectional view showing the whole configuration of a deck plate assembly with a truss girder attached integrally thereto according to a preferred embodiment of the present invention;

[14] FIG.3 is an enlarged view showing the coupled state of a coupling plate with a bottom plate of the deck plate assembly of this invention;

[15] FIG.4 is a plan view showing the configurations of deck plate assemblies according to another preferred embodiments of the present invention; and

[16] FIG.5 is a schematic view showing the process of forming the compression protrusion in manufacturing the deck plate assembly according to the present invention. Mode for the Invention

[17] FIG.2 is a perspective view and a partly sectional view showing the whole configuration of a deck plate assembly with a truss girder attached integrally thereto according to a preferred embodiment of the present invention, and as shown, the deck plate assembly constructed according to the preferred embodimentof the present invention is a well known deck plate wherein a truss girder 20 as a reinforcing member is attached integrally to a metal bottom plate 10 serving as a base member of the deck plate assembly. Under the construction of the well-known deck plate assembly, a coupling plate 30 is attached integrally to the lower portion of the truss girder 20, and the coupling plate 30 is fixedly placed on the bottom plate 10 in such a manner as to be superposed to each other. Referring to FIG.2, also, the coupling plate 30 and the bottom plate 10 have compression protrusions 15 and 35 formed at the positions corresponding to each other in such a manner as to make the innerperipheral surface of one side compression protrusion come into close contact with the outer peripheral surface of the other side compression protrusion.

[18] *In this embodiment of the present invention, the bottom plate 10, which is used for a general deck plate, is made of a metal plate in a given thickness for bearing the weight of concrete itself cast thereon and the construction load. The bottom plate 10 may be any one selected from a galvanized steel plate, a stainless steel plate, a colored steel plate, and an aluminum plate. According to the present invention, the bottom plate 10 is desirably of a generally flat shape in accordance with the general truss deck plate assembly as shown in FIG.2, which prevents the floor height after installing the deck plate from being increased.

[19] The truss girder 20 is attached integrally to the top surface of the bottom plate 10.

As well known, the truss girder 20 is a kind of reinforcing member for reinforcing the rigidity of the bottom plate (especially, the flat bottom plate). The trass girder 20 includes a horizontal reinforcing steel bar 21 for reinforcing the rigidity of the bottom plate and lattice steel wires 25 attached in symmetrical relation with respect to the horizontal reinforcing steel bar 21 for supporting the horizontal reinforcing steel bar 21, which takes a generally similar shape to a truss (according to such the outer appearance, the above-described reinforcing member is called trass girder in this field).

[20] Among the various kinds of existing deck plate assemblies, as mentioned above, the present invention is related to the truss deck plate assembly wherein the trass girder 20 made of the steel bar or the steel wire is attached on the metal bottom plate 10, and a main feature of the truss deck plate assembly according to the present invention is found in a coupling structure where the trass girder 20 is attached integrally to the bottom plate 10.

[21] In more detail, an explanation on the features of the present invention will be given below. As appreciated from FIG.2, according to the trass deck plate assembly of the present invention, the coupling plate 30 is integrally attached to the lower foot 25' of the lattice steel wire 25 of the truss girder 20. The coupling plate 30 is attached to the trassgirder 20 in vertical relation with respect to the ground, as shown, and desirably, it has such a size as to be protruded outwardly from the lower foot 25 of the lattice steel wire 25. The coupling plate 30 is made of a steel plate (since it is buried into the concrete later, there is no need for conducting rust-resistance), and it may be coupled firmly to the trass girder 20 by means of welding or various bonding as well known in the prior arts (in this case, the welding is most desirable in view of the simplicity of work, the working speed, and the costs consumed for the coupling). Moreover, as shown in FIG.3(a), the coupling plate 30 is attached to the bottom surface of the lower foot 25' of the lattice steel wire 25, and contrarily, as shown in FIG.3(b), it may be attached to the top surface of the lower foot 25.

[22] The trass girder 20 with the coupling plate 30 attached integrally to the bottom portion thereof is fixed rigidly to the bottom plate 10, thereby serving as a reinforcing member relative to the bottom plate 10, and according to the present invention, the coupling relation between the trass girder 20 and the bottom plate 10 is made by means of the coupling plate 30, which causes the main feature of the present invention that is not found in the conventional practices. That is to say, according to the present invention, the coupling plate 30 is attached to the lower portion of the trass girder 20, and the coupling plate 30 and the bottom plate 10 are coupled integrally to each other, not by means of general welding, but by means of mechanical coupling (for example, pressing).

[23] FIG.2 shows the preferred embodiment of the present invention wherein the coupling plate 30 and the bottom plate 10 are coupled integrally to each other by means of mechanical coupling. As shown in FIG.2, the coupling plate 30 and the bottom plate 10 have compression protrusions 15 and 35 formed at the positions corresponding to each other, and the compressing protrusions 15 and 35 may be formed in such a manner as to have the coupling plate 30 and the bottom plate 10 protruded by means of plastic working like pressing. At this time, the compression protrusions 15 and 35 formed in the coupling plate 30 and the bottom plate 10 have the same shape and position as each other, and at the same time, the inner diameter of one side compression protrusion (The reference numeral 35 in the drawing) has the almost same size as the outer diameter of the other side compression protrusion (The reference numeral 15 in the drawing), such thatthe compressions protrusions 15 and 35 come in close contact with each other, thereby making the coupling plate 30 rigidly fixed to the bottom plate 10. That is to say, the coupling relation between the coupling plate 30 and the bottom plate 10 is made by means of tight fitting, and according to the present invention, the truss girder 20 is fixed to the bottom plate 10 not by means of general welding, but by means of complete mechanical coupling, such that no welded marks are formed on the bottom surface of the bottom plate 10, which perfectly overcomes the problems the conventional deck plate assemblies have had.

[24] Further, the coupling plate 30 is coupled to the lower portion of the truss girder 20 by means of general welding, but even in this case, since the coupling plate 30 is fixed to the bottom plate 10 by means of physical fitting by the formation of the compression protrusions, the welded marks remaining on the coupling plate 30 are not exposed at all to the outside. That is to say, after the couplingplate 30 is fixed to the bottom plate 10, only the outer shape of the compression protrusion is revealed such that the welded marks remaining on the bottom surface of the coupling plate 30 are placed on the bottom plate 10, without any exposing to the outside. Thus, the truss girder 20 and the bottom plate 10 are coupled to each other, without giving any unpleasant feeling when seen at the outside.

[25] More specifically, according to the present invention the bottom plate 10 is a general galvanized steel plate, but if it may be a colored metal plate for obtaining more beautiful appearance and for preventing corrosion, the features of the present invention are well revealed thus to obtain better effects. That is to say, if the general deck plates wherein thetruss girder is fixed to the bottom plate by means of existing welding are to employ the colored metal plate, the color applied on the bottom surface may be stripped or discolored by the application of welding heat, such that there occur some problems that outer appearances are not good and the corrosion may occur easily. However, in case of the deck plate assembly of the present invention wherein the coupling plate and the bottom plate are fixed to each other not by means of welding, but by means of physical coupling, there are some advantages in that no fear of color damages exists and excellent outer appearances are ensured.

[26] On the other hand, so as to couple the bottom plate 10 and the coupling plate 30 with each other by means of the formation of the compression protrusions 15 and 35, of course, the compression protrusions 15 and 35 may be previously formed on the corresponding positions of the coupling plate 30 and the bottom plate 10, and then, the coupling plate 30 and the bottom plate 10 may be fitted to each other. However, if do so, the position and size of each compression protrusion have to be accurately set and made, which ineffectively needs a high degree of precision and many endeavors for fitting them. Therefore, as will be described below, at the state where the coupling plate 30 is placed on the bottom plate 10, the coupling plate 30 and the bottom plate 10 are depressed and fixed to each other at a time, which is desirably adopted in the preferred embodiment of the present invention.

[27] FIGS.5a to 5c are schematic views showing the process of forming the compression protrusion in manufacturing the deck plate assembly according to the present invention. As shown, so as to couple the coupling plate 30 and the bottom plate 10 to fixedly mountthe truss girder 20, the coupling plate 30 is first attached integrally to the lower portion of the truss girder 20, and next, after the truss girder 20 with the coupling plate 30 attached thereto is disposed at the position to be mounted on the bottom plate 10, a superposed portion of the coupling plate 30 and the bottom plate 10 is disposed between a punch 100 and a concave mold 200 having a depressed part 220 formed thereon. After that, the coupling plate 30 and the bottom plate 10 are pressed by using the punch 100 and the concave mold 200 to form the compression protrusions 15 and 35 at a time, such that the truss girder 20 is fixedly attached to the bottom plate 10.

[28] In other words, as shown in FIG.5, a superposed portion of the coupling plate 30 andthe bottom plate 10 is disposed between the concave mold 200 and the punch 100 (in the drawing, the concave mold 200 is disposed above the coupling plate 30, and the punch 100 is disposed beneath the bottom plate 10, but the arrangement may be reversely made), and next, if the punch 100 and the concave mold 200 are moved to press the coupling plate 30 and the bottom plate 10 against them, the coupling plate 30 and the bottom plate 10 are forcedly pushed into the depressed part 220 of the concave mold 200 to naturally form the compression protrusions 15 and 35. At this time, the compression protrusion has an outer diameter in a range between about 6mm and 12mm and a protruded height in a range between about lmm and 2mm, but it may have various sizes in accordance with the thickness of the steel plate and other manufacturing conditions.

[29] *On the other hand, FIGS.4a to 4c are plan views showing the configurations of deck plate assemblies according to another preferred embodiments of the present invention, and the present invention may have another preferred embodiments in addition to the preferred embodiment as shown in FIG.2. In other words, as shown in FIG.4(a), the coupling plate 30 may be attached to every foot 25' of the truss girder 20 (which is shown in FIG.2), and otherwise, as shown in FIG.4(b), it may be formed extendedly in a parallel relation with respect to the longitudinal direction of the truss girder 20, or as shown in FIG.4(c), it may be formed extendedly in a perpendicular relation with respect to the longitudinal direction of the truss girder 20, so as to couple the plurality of foots 25' thereon.

[30] Also, the compression protrusions 15 and 35 are of a round shape in the preferred embodiments of the present invention, but they may have square or other shapes. Moreover, the two compression protrusions 15 and 35 are formed at every foot, as shown, but the two or more (or less) may be formed. Furthermore, unlike the shape of truss girder as shown in the preferred embodiments of the present invention, other shaped truss girders for reinforcing rigidity may be of course adopted. Industrial Applicability

[31] The present invention relates to a deck plate assembly that is used as a material for building the slab of a structure, and more particularly, the present invention is applicable to a manufacturing field of the truss deck plate assembly with a truss girder attached integrally to a bottom plate. The present invention allowsthe truss girder to be attached integrally to the bottom plate, such that no welded marks are formed on the bottom surface of the bottom plate of the deck plate assembly, thereby preventing the painted or plated material from being damaged and also obtaining better outer appearance effects.

Claims

[1] A non- welding type deck plate assembly with a truss girder attached integrally thereto comprising: a coupling plate attached horizontally to the lower portion of the truss girder; and a metal bottom plate coupled integrally to the bottom surface of the coupling plate.

[2] The non-welding type deck plate assembly according to claim 1 , whereinthe coupling plate and the bottom plate have compression protrusions formed at the positions corresponding to each other in such a manner asto make the inner peripheral surface of one side compression protrusion come into close contact with the outer peripheral surface of the other side compression protrusion.

[3] The non-welding type deck plate assembly according to claim 2, wherein the truss girder comprises one or more reinforcing steel bars for reinforcing the rigidity of the bottom plate and lattice steel wires attached to the reinforcing steel bars in such a manner as to be in a symmetrical relation with respect to the reinforcing steel bars for supporting the reinforcing steel bars, each of the lattice steel wires having a plurality of foots arranged at given intervals at the bottom portions thereof.

[4] The non-welding type deck plate assembly according to claim 3, wherein the coupling plate is attached to every foot of the truss girder.

[5] The non-welding type deck plate assembly according to claim 3, wherein the coupling plate is formed extendedly in a parallel or perpendicular relation with respect to the longitudinal direction of the truss girder, so as to couple the plurality of foots thereon.

[6] The non-welding type deck plate assembly according to any one of claims 1 to 5, wherein the metal bottom plate is any one selected from a galvanized steel plate, a stainless steel plate, an aluminum plate, and a colored steel plate.

[7] A method of manufacturing a non-welding type deck plate assembly with a truss girder attached integrally thereto, the method comprising the steps of: integrally attaching a coupling plate to the lower portion of the truss girder; disposing the truss girder having the coupling plate attached thereto at a given position on a bottom plate; and disposing a superposed portion of the coupling plate and the bottom plate between a punch having a protruded part formed on a pressuring surface thereof and a concave mold having a depressed part formed thereon, and pressing the coupling plate and the bottom plate by using the punch and the mold to have compression protrusions formed on the coupling plate and the bottom plate, such that the truss girder is fixedly attached to the bottom plate.