TWI405891B - Lu-shaped hidden-type steel plate - Google Patents

Abstract

An LU-shaped hidden-type steel plate includes a steel plate and a fixing base. The steel plate is provided with a first linking member formed at one end portion and a second linking member formed at the other end portion. Then the first linking member of one steel plate is combined with the second linking member of another steel plate initially, and the combined portion of the two steel plates constitutes the linked member. Then the fixing base is used to fix the linked member of the two linked steel plates, keeping the two linked steel plates together tightly, with bolts used in the linked member being hidden by the fixing base.

Description

LU type concealed steel plate structure

The invention relates to a LU type concealed steel plate structure, in particular to a first joint portion and a second joint portion of the steel plate, and the first joint portion of the first steel plate and the second joint portion of the second steel plate are combined with each other to form a joint. And the first joint of the steel plate is combined with the fixing seat to form a concealed steel plate structure.

According to the conventional concealed steel plate structure, such as the Taiwan invention patent No. I247069 "hidden steel bearing structure", the main part is the buckle end of the peak cover, which is fastened to the peak of the steel plate by the fastening end. Concealed steel plate structure.

For example, Taiwan's new patent No. M293585 "hidden steel plate structure" is provided with an obtuse-angled groove at the peak of the steel plate, and a peak cover is attached to cover the peak of the steel plate to form a structure of a hidden steel plate.

For example, Taiwan's new patent No. M326554 "Hidden Screw Wave Plate" is provided with a span portion and a erecting portion of the steel plate, and a 固定-shaped fixing seat is provided under the steel plate to be a bolt.

Each of the above-described conventional concealed steel sheets, in which the first and second conventional persons use a cover plate to cover the joint of adjacent steel sheets. The third conventional one is to use the adjacent steel plates to join each other and fix them with a ㄇ-shaped fixing seat, which is inconvenient in construction or filling waterproof materials.

To this end, the inventors have researched and improved the shortcomings of the prior disclosure and invented the present case.

The purpose of the present invention is to provide a convenient and quick combination of the adjacent first steel plate and the second steel plate, in addition to strengthening the joint structure of the adjacent steel plates, a hidden structure can be formed to avoid the exposure of the bolting components. LU-type concealed steel plate structure that enhances the effect of rust prevention on the outer surface and reduces the chance of moisture infiltrating into the building.

In the LU type concealed steel plate structure of the present invention, the steel plate is mainly provided with a first joint portion and a second joint portion, and the first joint portion of the first steel sheet and the second joint portion of the second steel sheet are coupled to each other.

The LU type concealed steel plate structure of the present invention is mainly provided with a fixing seat above the joint portion of the first steel plate and the second steel plate, and the first steel plate and the second steel plate are combined and stabilized by the fixing seat to form a hidden structure. .

In this way, in order to enable the inspector to fully understand the present invention, as illustrated in the accompanying drawings, as shown in FIGS. 1 and 2, the present invention is a LU-type concealed steel plate structure including at least a steel plate 1 and a first joint portion 10 The first joint portion 10 extends from one side of the steel plate, and the first joint portion 10 can also be plural as shown in FIGS. 5B and 5C, so that the first joint portion 10A located in the middle portion of the steel sheet forms a decorative effect of the steel sheet, and of course, A joint portion 10 is used as a combination of adjacent steel plates. The first joint portion 10 is provided with two side surfaces 100, and the two side surfaces 100 are inclined. The outer side surface 100 is provided with an extension portion 101, and the extension portion 101 is provided. There is no reverse folding portion; or a folding portion 102 is provided as shown in Figs. And a lower extending surface 103 is formed from the upper side of the side surface 100, and a coupling groove 104 is formed below the lower extending surface 103, and a fastening end 105 is disposed on both sides of the coupling groove 104, so as to be obtained by the first joint portion 10 The side surface 100, the lower extension surface 103 and the coupling groove 104 form a projecting recess 106, and the opening and closing elasticity of the side surface 100, the lower extension surface 103 and the coupling groove 104 are formed. The steel plate 1 is provided with a second joint portion 11 which extends from the other side of the steel plate to form one or two side faces 110, and the side faces 110 are inclined, and are disposed downward from above the side faces 110. The extending surface 111 defines a coupling groove 112 under the lower extending surface 111, and a fastening end 113 (such as FIG. 1-4) is disposed on both sides of the coupling groove 112, so as to be obtained on the side surface 110 of the second joint portion 11 and below. The extension surface 111 and the coupling groove 112 form a protruding recess 114 to form the opening and closing elasticity of the side surface 110, the lower extension surface 111 and the coupling groove 112. As shown in FIG. 5A-5C, the lower extension surface 111 is not provided with a coupling groove, but a fastening end 113A is formed, so that the side surface 110, the lower extension surface 111 and the fastening end of the second joint portion 11 are obtained. 113A forms a projecting recess 114 to form the opening and closing elasticity of the side surface 110, the lower extension surface 111 and the engaging end 113A.

Thus, as shown in FIGS. 2, 4 and 6, when the adjacent two steel plates 1 are to be joined to each other, the first joint portion 10 of the first steel sheet 1A is combined with the second joint portion 11 of the second steel sheet 1B, and as shown in FIG. 2 and 4 is placed in the first joint portion 10 of the first steel sheet 1A with the second joint portion 11 of the second steel sheet 1B, and is attached to the side surface of the first joint portion 10 by the side surface 110 of the second joint portion 11 The lower extending surface 111 of the second joint portion 11 is bonded to the lower extending surface 103 of the first joint portion 10, and the joint groove 112 of the second joint portion 11 is combined with the joint groove 104 of the first joint portion 10, and The fastening end 113 of the coupling groove 112 of the second joint portion 11 and the fastening end 105 of the coupling groove 104 of the first joint portion 10 are combined with each other to complete the first stage of joining the adjacent two steel plates 1A, 1B. Or as shown in FIG. 6 , the second joint portion 11 of the second steel plate 1B is disposed under the first joint portion 10 of the first steel sheet 1A, and the side surface 110 of the second joint portion 11 and the side of the first joint portion 10 are The side surface 100 is bonded, and the lower extending surface 111 of the second joint portion 11 is adhered to the lower extending surface 103 of the first joint portion 10, and the engaging groove 113A of the second joint portion 11 and the first joint portion 10 are combined with the groove. The fastening ends 105 of 104 are combined with each other to complete the bonding of the adjacent two steel plates 1A, 1B.

Furthermore, as shown in FIGS. 7 and 8A, before the two adjacent steel plates are joined to each other, the steel beam 2 is bolted to the fixing seat 3 by the bolting member 20. The fixing seat 3 is provided with the lower surface 30, and the lower surface 30 is provided with reinforcement. It is also possible that the rib 300 or the reinforcing rib is not provided. An upper extending surface 31 is disposed on both sides of the lower surface 30. The upper extending surface 31 is inclined. The upper extending surface 31 is provided with a fastening end 310, and a downwardly bent end 32 is formed at the end of the upper extending surface 31. The face 31 and the lower bent end 32 are formed with a recess 33 to provide the tension of the upper extended face 31 and the lower bent end 32. As shown in FIG. 9A, the fixing seat 3A is provided with an inner bending end 32A on the upper extending surface 31 instead of the fastening end 310 of FIGS. 7 and 8A.

Thus, as shown in FIG. 8A, after the first steel plate 1A and the second steel plate 1B are joined to each other, the bonding groove 104 of the first bonding portion 10 of the first steel plate 1A is bonded to the lower surface of the fixing base 3, and The fastening end 105 of the coupling groove 104 of the first joint portion 10 of the steel plate 1A is combined with the fastening end 310 of the upper extension surface 31 of the fixing seat 3, so that the first steel plate 1A and the fixing seat 3 can be combined, that is, Adjacent steel plates are fixed by the fixing base 3 and the steel beam 2. Or, as shown in FIG. 8B, the fixing base 3 is bolted to the steel beam 2 by the bolting member 20, and then combined with the first joint portion 10A of the steel plate 1, and the middle portion of the steel plate 1 and the steel beam 2 can be fixed.

As shown in FIG. 9A, the bonding method of the adjacent steel plates of FIGS. 2 and 4 is applied, and the bonding groove 104 of the first bonding portion 10 of the first steel plate 1A is bonded to the lower surface of the fixing base 3, and the first steel plate 1A is used. The fastening end 105 of the coupling groove 104 of the first joint portion 10 is combined with the inner bending end 32A of the upper extension surface 31 of the fixing base 3, so that the first steel plate 1A can be combined with the fixing seat 3, and then the second steel plate can be combined. When 1B is combined with the first steel sheet 1A, the adjacent steel sheets can be fixed by the fixing base 3 and the steel beam 2. Or, as shown in FIG. 9B, the fixing base 3 is bolted to the steel beam 2 by the bolting member 20, and then combined with the first joint portion 10A of the steel plate 1, and the middle portion of the steel plate 1 and the steel beam 2 are fixed.

As shown in FIG. 10A, the bonding method of the adjacent steel plates of FIGS. 2 and 4 is applied, and the bonding groove 104 of the first bonding portion 10 of the first steel plate 1A can be bonded to the lower surface of the fixing base 3, and the first steel plate 1A is used. The fastening end 105 of the coupling groove 104 of the first joint portion 10 is combined with the fastening end 310 of the upper extension surface 31 of the fixing seat 3, so that the first steel plate 1A can be combined with the fixing seat 3, and the second steel plate 1B can be combined. In combination with the first steel plate 1A, adjacent steel plates can be fixed by the fixing base 3 and the steel beam 2, and the waterproof material 4 is disposed in the fixing base 3, and then the bolting member 20 is bolted to the steel beam 2. . Or, as shown in FIG. 10B, the waterproof material 4 is disposed in the fixing base 3, and then the bolting member 20 is bolted to the steel beam 2, and then combined with the first joint portion 10A of the steel plate 1, the middle portion of the steel plate 1 and the steel can be The beam 2 is fixed.

As shown in FIG. 11A, the bonding groove 104 of the first joint portion 10 of the first steel plate 1A is directly fastened by the bolting member 20 and the steel beam 2 by using the joining method of the adjacent steel plates of FIG. 2 and FIG. When 1B is combined with the first steel sheet 1A, the adjacent steel sheets and the steel beams 2 can be fixed. Or, as shown in FIG. 11B, the joining groove 104 of the first joint portion 10A of the steel sheet 1 is bolted to the steel beam 2 by the bolting member 20, so that the middle portion of the steel sheet 1 and the steel beam 2 can be fixed.

As shown in FIG. 12A, the second steel plate 1B is first joined to the first steel plate 1A by using the joining method of the adjacent steel plates of FIG. 6, and the waterproof material 4 is disposed in the coupling groove 104 of the first joint portion 10 of the first steel plate 1A. Then, the joint groove 104 of the first joint portion 10 of the first steel sheet 1A is directly fastened by the bolt member 20 and the steel beam 2, so that the adjacent steel sheet and the steel beam 2 can be fixed. Or, as shown in FIG. 12B, the waterproof member 4 is provided on the first joint portion 10A of the steel sheet 1, and the bolt member 20 is bolted to the steel beam 2, so that the middle portion of the steel sheet 1 and the steel beam 2 can be fixed.

13A and 14A, the second steel plate 1B is first joined to the first steel plate 1A by using the joining method of the adjacent steel plates of FIG. 6, and the waterproofing material is disposed in the coupling groove 104 of the first joint portion 10 of the first steel plate 1A. 4. Then, the coupling groove 104 of the first joint portion 10 of the first steel plate 1A is directly fastened by the bolting member 20 and the steel beam 2, and the adjacent steel plate and the steel beam 2 can be fixed, and finally the steel plate 1 is fixed. The first joint portion 10 is covered by the cover member 5 to provide a second heavy waterproof effect. Or, as shown in FIGS. 13B and 14B, the first joint portion 10A of the steel sheet 1 is provided with the waterproof material 4, and the bolt member 20 is bolted to the steel beam 2, so that the middle portion of the steel sheet 1 and the steel beam 2 can be fixed, and finally The first joint portion 10 of the steel sheet 1 is covered with the cover member 5 to provide a second heavy waterproof effect.

As shown in FIGS. 13A, 13B and 14A and 14B, the cover member 5 is provided with an inward joint end 50 and an upper surface 51, and the joint end 50 is used to obtain a joint groove with the first joint portion 10, 10A of the steel sheet 1. When the fastening end 105 of the 104 is joined, the cover member 5 can be combined with the steel plate 1.

As shown in FIG. 15A, the second steel plate 1B is first joined to the first steel plate 1A by using the bonding method of the adjacent steel plates of FIG. 6, and the waterproof material 4 is disposed in the coupling groove 104 of the first bonding portion 10 of the first steel plate 1A. Further, the first joint portion 10 of the steel sheet 1 is covered by the cover member 5A, and the plug member 20 is passed through the joint groove 104 of the first joint portion 10 of the first steel sheet 1A from the cover member under the cover member. The material 4 and the steel beam 2 are directly bolted, and the adjacent steel plate and the steel beam 2 can be fixed, and finally the upper cover 53 and the lower cover 52 of the cover member 5A are combined to provide the second heavy waterproof effect. . Or, as shown in FIG. 15B, the waterproof material 4 is disposed on the first joint portion 10A of the steel sheet 1, and then the bolt member 20 is bolted to the steel beam 2, and then the first joint portion 10 of the steel sheet 1 is covered by the cover member 5A. And the bolting member 20 is directly fastened from the lower groove 52 of the cover member 5 through the coupling groove 104 of the first joint portion 10A of the steel plate 1A, the waterproof material 4, and the steel beam 2 is directly fastened, and finally the cover member 5A is used. The upper cover 53 is combined with the lower cover 52 to provide a second heavy waterproof effect.

The cover member 5A is provided with a lower cover 52 as shown in FIGS. 15A and 15B, and the lower cover 52 is provided with an outward extending portion 520, and is covered by the extending portion 520 over the first joint portions 10, 10A of the steel sheet 1. And the bolting member 20 is bolted from the lower cover 52 of the cover member 5 to the first joint portion 104 of the steel plate 1 and the steel beam 2, so that the steel plate 1, the steel beam 2 and the cover member 5 can be combined, and The cover member 53 is provided with a cover plate 53. The upper cover plate 53 is provided with an inner bent end 530, and is coupled with the end of the extension portion 520 of the lower cover 52 to achieve the combination of the cover member 5A and the steel plate. purpose.

In summary, the present invention utilizes the combination of the first joint portion and the second joint portion of the steel plate, or may be combined with the steel plate by a fixing seat, and serves as a bridging effect of the steel plate and the steel beam to form a hidden metal steel plate structure, or may be It is made of waterproof material to provide waterproof effect and supplemented with cover elements to produce double waterproof effect.

1. . . Steel plate

1A. . . First steel plate

1B. . . Second steel plate

10, 10A. . . First joint

100. . . Side face

101. . . Extension

102. . . Reverse folding

103. . . Lower extension

104. . . Combined slot

105. . . Buckle end

106. . . Slotted empty slot

11. . . Second joint

110. . . Side face

111. . . Lower extension

112. . . Combined slot

113. . . Buckle end

114. . . Slotted empty slot

113A. . . Buckle end

2. . . Steel beam

20. . . Bolting component

3, 3A. . . Fixed seat

30. . . lower surface

300. . . Rib reinforcement

31. . . Upper extension surface

310. . . Buckle end

32. . . Bend end

33. . . Empty slot

32A. . . Inner bent end

4. . . Waterproof material

5. . . Covering element

50. . . Binding end

51. . . Upper surface

5A. . . Covering element

52. . . Lower cover

520. . . Extension

53. . . Upper cover

530. . . Binding end

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side view of a first embodiment of the present invention.

Fig. 2 is an enlarged cross-sectional view showing the combination of adjacent steel sheets in the first embodiment of the present invention.

Figure 3 is a side view of a second embodiment of the present invention.

Figure 4 is an enlarged cross-sectional view showing the combination of adjacent steel sheets in the second embodiment of the present invention.

Figure 5A is a side elevational view of a third embodiment of the present invention.

Figure 5B is a side view of a third embodiment of the present invention.

Figure 5C is a side view of a third embodiment of the present invention.

Figure 6 is an enlarged cross-sectional view showing the combination of adjacent steel sheets in the third embodiment of the present invention.

Figure 7 is a view of a first embodiment of a mount for use in the present invention.

Fig. 8A is a cross-sectional view showing an operation example 1 of the adjacent steel plate and the fixing base of the present invention.

Fig. 8B is a cross-sectional view showing an operation example 1 of the adjacent steel plate and the fixing base of the present invention.

Fig. 9A is a cross-sectional view showing the second operation example of the adjacent steel plate and the fixing base of the present invention.

Fig. 9B is a cross-sectional view showing the second operation example of the adjacent steel plate and the fixing base of the present invention.

Fig. 10A is a cross-sectional view showing the third operation example of the adjacent steel plate and the fixing base of the present invention.

Fig. 10B is a cross-sectional view showing the third operation example of the adjacent steel plate and the fixing base of the present invention.

Fig. 11A is a cross-sectional view showing a first operation example of the combination of the steel sheet and the steel beam of the present invention.

Fig. 11B is a cross-sectional view showing a first embodiment of the use of the steel sheet of the present invention in combination with a steel beam.

Fig. 12A is a cross-sectional view showing a second operation example of the combination of the steel sheet and the steel beam of the present invention.

Fig. 12B is a cross-sectional view showing the second operation example of the combination of the steel sheet and the steel beam of the present invention.

Fig. 13A is a cross-sectional view showing the third operation example of the combination of the steel sheet and the steel beam of the present invention.

Fig. 13B is a cross-sectional view showing the third operation example of the combination of the steel sheet and the steel beam of the present invention.

Fig. 14A is a cross-sectional view showing the fourth operation example of the combination of the steel sheet and the steel beam of the present invention.

Fig. 14B is a cross-sectional view showing the fourth operation example of the combination of the steel sheet and the steel beam of the present invention.

Fig. 15A is a cross-sectional view showing the fifth operation example of the combination of the steel sheet and the steel beam of the present invention.

Fig. 15B is a cross-sectional view showing the fifth operation example of the combination of the steel sheet and the steel beam of the present invention.

1‧‧‧ steel plate

1A‧‧‧First steel plate

1B‧‧‧second steel plate

10‧‧‧ First Joint Department

100‧‧‧ side faces

101‧‧‧Extension

103‧‧‧Under the extension

104‧‧‧ Combination slot

105‧‧‧ buckle end

11‧‧‧Second junction

110‧‧‧Side side

111‧‧‧Under the extension

114‧‧‧ empty slot

113A‧‧‧ buckle end

2‧‧‧ steel beam

20‧‧‧Equipment components

3‧‧‧ Fixed seat

30‧‧‧ lower surface

300‧‧‧Strengthened ribs

31‧‧‧Upper extension

310‧‧‧ buckle end

32‧‧‧Bottom bent end

33‧‧‧ empty slots

Claims (27)

The utility model relates to a LU type concealed steel plate structure, which comprises at least: a steel plate, a first joint portion and a second joint portion; the first joint portion is provided with a side surface, a lower extension surface is disposed above the side surface, and the lower extension surface is provided below a groove, the coupling groove is bent outwardly to protrude from the fastening end, that is, the first joint portion is formed with a hollow groove; the second joint portion is provided with a side surface, and the side surface is provided with a lower extension surface, the lower portion a coupling groove is disposed under the extending surface, and the engaging groove is bent outwardly to protrude from the engaging end, that is, the second joint portion is formed with a hollow groove; or the second joint portion is provided with a lower extending surface of the side surface, and Forming a fastening end on the outer side in the downward direction of the lower extension surface, that is, forming a hollow groove in the second joint portion; and using the first joint of the adjacent first steel plate and the second joint of the second steel plate The first portions and the second steel plate are combined with each other to form a joint portion; the fixing seat is provided with a lower surface, the lower surface is provided with an extended surface, and the end of the upper extending surface is formed with a downwardly bent end, that is, Forming an empty groove in the aforementioned fixing seat, the aforementioned upper extension Or a lower end of the lower bending end is bent outwardly to form a fastening end, so as to use the fastening end of the upper extension surface or the lower bending end to bend inwardly, and the first joint portion of the first steel plate is combined The fastening ends of the groove bent outwardly are mutually engaged; and the fixing seat is combined with the steel beam and combined with the joint portion of the steel plate to completely bond the adjacent first steel plate and the second steel plate. Form a hidden steel plate structure. The utility model relates to a LU type concealed steel plate structure, which comprises at least: a steel plate, a first joint portion and a second joint portion; the first joint portion is provided with a side surface, a lower extension surface is disposed above the side surface, and the lower extension surface is provided below a groove, the coupling groove is bent outwardly to protrude from the fastening end, that is, the first joint portion is formed with a hollow groove; the second joint portion is provided with a side surface, and the side surface is provided with a lower extension surface, the lower portion a coupling groove is disposed under the extending surface, and the engaging groove is bent outwardly to protrude from the engaging end, that is, the second joint portion is formed with a hollow groove; or the second joint portion is provided with a lower extending surface of the side surface, and Forming a fastening end on the outer side in the downward direction of the lower extension surface, that is, forming a hollow groove in the second joint portion; and using the first joint of the adjacent first steel plate and the second joint of the second steel plate The parts are combined with each other to form a joint portion, and the adjacent first and second steel plates can be combined with each other; a fixing seat, a lower surface, wherein the lower surface is provided with an extending surface, and the end of the upper extending surface forms a downwardly bent end, that is, the fixing seat forms an empty groove, and the upper extending surface or the lower bending end is bent inward The folding protrusion is provided with a fastening end, and the buckle end which is bent inward by the upper extension surface or the lower bending end is bent outwardly with the coupling groove of the first joint portion of the first steel plate The joint ends are fastened to each other; the waterproof material is fixed at the fixed seat, and the steel beam is combined with the joint of the steel plate to completely join the adjacent first steel plate and the second steel plate to form a hidden steel plate structure. . The LU type concealed steel plate structure according to the first or second aspect of the patent application, wherein the first joint portion of the steel plate is formed by the side surface, the lower extension surface and the joint groove to form a protruding hollow groove to form a closed shape. elasticity. The LU type concealed steel plate structure according to claim 1 or 2, wherein the side surface of the first joint portion of the steel plate is inclined. The LU type concealed steel plate structure according to the first or second aspect of the patent application, wherein the side surface of the first joint portion of the steel plate may be provided with an extension portion. The LU type concealed steel plate structure according to the first or second aspect of the patent application, wherein the extending portion of the side surface of the first joint portion of the steel plate is provided with a reversed portion. The LU type concealed steel plate structure according to claim 1 or 2, wherein the first joint portion of the steel plate may be plural. According to the LU type concealed steel plate structure described in claim 7, wherein the side surface of the second joint portion of the steel plate is inclined. The LU type concealed steel plate structure according to claim 1 or 2, wherein the second joint portion of the steel plate is provided with one or two side faces, and the side faces and the lower extension faces of the second joint portion are combined with each other. The groove forms a protruding hollow groove; or the side surface, the lower extension surface of the second joint portion and the fastening end form a protruding groove to form the tension of the opening. The LU type concealed steel plate structure according to the first or second aspect of the patent application, wherein when the two adjacent steel plates are combined with each other, the second joint portion of the second steel plate is placed into the first joint portion of the first steel plate, and The side surface of the second joint portion is in contact with the side surface of the first joint portion, the lower joint surface of the second joint portion is in contact with the lower surface of the first joint portion, and the joint groove of the second joint portion is The joint groove of the joint portion is combined, and the fastening end of the joint groove of the second joint portion and the joint end of the joint groove of the first joint portion are mutually Combine. The LU type concealed steel plate structure according to the first or second aspect of the patent application, wherein when the two adjacent steel plates are combined with each other, the second joint portion of the second steel plate is disposed under the first joint portion of the first steel plate, And the side surface of the second joint portion is in contact with the side surface of the first joint portion, the lower joint surface of the second joint portion is in contact with the lower extension surface of the first joint portion, and the buckle end of the second joint portion The fastening ends of the coupling grooves of the first joint portion are coupled to each other. The LU-type concealed steel plate structure according to claim 1 or 2, wherein the fixing seat forms a hollow groove at the upper extension surface and the lower bending end to generate the opening and closing elasticity. The LU type concealed steel plate structure according to claim 1 or 2, wherein the extending surface above the fixing seat is inclined. The LU type concealed steel plate structure according to claim 1 or 2, wherein the fixing seat has an inner bent end on the upper extending surface. The utility model relates to a LU type concealed steel plate structure, which comprises at least: a steel plate, a first joint portion and a second joint portion; the first joint portion is provided with a side surface, a lower extension surface is disposed above the side surface, and the lower extension surface is provided below a groove, the coupling groove is bent outwardly to protrude from the fastening end, that is, the first joint portion is formed with a hollow groove; the second joint portion is provided with a side surface, and the side surface is provided with a lower extension surface, the lower portion a coupling groove is disposed under the extending surface, and the engaging groove is bent outwardly to protrude from the engaging end, that is, the second joint portion is formed with a hollow groove; or the second joint portion is provided with a lower extending surface of the side surface, and Forming a fastening end on the outer side in the downward direction of the lower extension surface, that is, forming a hollow groove in the second joint portion; and using the first joint of the adjacent first steel plate and the second joint of the second steel plate The joints are combined with each other to form a joint portion, so that the adjacent first and second steel sheets are combined with each other, and the joint groove of the first joint portion of the first steel sheet is combined with the steel beam by the bolting member. The LU-type concealed steel plate structure according to the fifteenth aspect of the patent application, wherein the first joint portion of the steel plate is formed on the side surface, the lower extension surface and the joint groove to form a protruding hollow groove to form the tension of the opening. LU type concealed steel plate knot according to item 15 of the patent application scope The side surface of the first joint portion and the second joint portion of the steel sheet is inclined. According to the LU type concealed steel plate structure described in claim 15, wherein the side surface of the first joint portion of the steel plate may be provided with an extension portion. According to the LU type concealed steel plate structure described in claim 15 of the patent application, the first joint portion of the steel plate may be plural. According to the LU type concealed steel plate structure according to Item 15 of the application patent, wherein the second joint portion of the steel plate is provided with one or two side faces, which are formed by the side faces, the lower extension faces of the second joint portion and the joint groove. The protruding hollow groove; or the protruding side groove formed by the side surface, the lower extending surface and the fastening end of the second joint portion to form the opening and closing elasticity. According to the LU type concealed steel plate structure described in claim 15 of the patent application, when the two adjacent steel plates are combined with each other, the second joint portion of the second steel plate is placed into the first joint portion of the first steel plate, and The side surface of the second joint portion is in contact with the side surface of the first joint portion, the lower joint surface of the second joint portion is in contact with the lower extension surface of the first joint portion, and the joint groove of the second joint portion is combined with the first joint portion The coupling groove of the portion is coupled, and the fastening end of the coupling groove of the second joint portion and the fastening end of the coupling groove of the first joint portion are coupled to each other. According to the LU type concealed steel plate structure according to Item 15 of the application patent, wherein when the two adjacent steel plates are combined with each other, the second joint portion of the second steel plate is disposed under the first joint portion of the first steel plate, and The side surface of the second joint portion is in contact with the side surface of the first joint portion, the lower joint surface of the second joint portion is in contact with the lower extension surface of the first joint portion, and the fastening end of the second joint portion is The fastening ends of the coupling grooves of a joint portion are coupled to each other. According to the LU type concealed steel plate structure described in claim 15, wherein the first joint portion of the steel plate is provided with a waterproof material and then the bolting member is coupled with the steel beam. The utility model relates to a LU type concealed steel plate structure, which comprises at least: a steel plate, a first joint portion and a second joint portion; the first joint portion is provided with a side surface, a lower extension surface is disposed above the side surface, and the lower extension surface is provided below a groove, the coupling groove is bent outwardly to protrude from the fastening end, that is, the first joint portion is formed with a hollow groove; the second joint portion is provided with a side surface, and the side surface is provided with a lower extension surface, front a coupling groove is disposed below the extension surface, and the coupling groove is bent outwardly to form a fastening end, that is, a groove is formed in the second joint portion; or the second joint portion is provided with a lower extension surface on the side surface And bending the protruding end outwardly in the downward direction of the lower extension surface, that is, forming a hollow groove in the second joint portion; and using the first joint portion of the adjacent first steel plate and the second steel plate The two joint portions are combined with each other to form a joint portion, that is, the adjacent first and second steel sheets are combined with each other, and the joint groove of the first joint portion of the first steel sheet is combined with the steel beam by the bolting member; the cover member is The joint end and the upper surface are combined with the first joint portion of the steel sheet by the joint end to bond the cover member to the steel sheet. The LU type concealed steel plate structure according to claim 24, wherein the joint groove of the first joint portion of the first steel plate is provided with a waterproof material. The LU type concealed steel plate structure according to claim 24, wherein the bonding end of the cover member is combined with the fastening end of the coupling groove of the first joint portion of the steel plate. The utility model relates to a LU type concealed steel plate structure, which comprises at least: a steel plate, a first joint portion and a second joint portion; the first joint portion is provided with a side surface, a lower extension surface is disposed above the side surface, and the lower extension surface is provided below a groove, the coupling groove is bent outwardly to protrude from the fastening end, that is, the first joint portion is formed with a hollow groove; the second joint portion is provided with a side surface, and the side surface is provided with a lower extension surface, the lower portion a coupling groove is disposed under the extending surface, and the engaging groove is bent outwardly to protrude from the engaging end, that is, the second joint portion is formed with a hollow groove; or the second joint portion is provided with a lower extending surface of the side surface, and Forming a fastening end on the outer side in the downward direction of the lower extension surface, that is, forming a hollow groove in the second joint portion; and using the first joint of the adjacent first steel plate and the second joint of the second steel plate The joints are combined with each other to form a joint portion, and the adjacent first and second steel plates are combined with each other, and the joint groove of the first joint portion of the first steel plate is combined with the steel beam by the bolting member; the cover member is set a cover plate, the lower cover plate is provided with an extension portion, and the extension portion is utilized Cooperating with the first joint portion of the steel plate, and bolting from the cover plate of the cover member to the first joint portion of the steel plate and the steel beam; the cover member is provided with a cover plate, the foregoing The cover is provided with a joint end, and the extension of the aforementioned lower cover is obtained. End combination.