Sandwich board wall surface edge closing node system with concave modeling

Abstract

The embodiment of the utility model provides a laminboard wall surface edge closing node system with an inward concave shape. The laminboard wall surface edge closing node system comprises a building main body; the sandwich board is spliced and connected to the building main body and the building external facade; the building external facade comprises an outer side sandwich panel splicing seam; the splicing seams of the outer sandwich board comprise transverse splicing seams and longitudinal splicing seams; the edge closing assembly comprises a first edge closing piece, a second edge closing piece and a third edge closing piece, the first edge closing piece and the third edge closing piece are arranged at the longitudinal splicing seam in a combined mode, and the second edge closing piece and the third edge closing piece are arranged at the transverse splicing seam in a combined mode; the first edge closing piece and the second edge closing piece are provided with protruding bent parts, and the bent parts can cover the fasteners on the outer side of the sandwich panel. According to the technical scheme, the bending parts on the first edge closing piece and the second edge closing piece can shield the fasteners on the laminboards at the transverse splicing seams and the longitudinal butt seams correspondingly, so that the attractiveness of the splicing seams of the outer laminboards is effectively improved, and the overall building facade is more attractive.

Description

Technical Field

[0001] The present application relates to the technical field of building materials, and in particular to a sandwich panel wall edge node system with a concave shape. Background Art

[0002] Sandwich panels are widely used in steel structures due to their high strength, light weight, and ease of fabrication. Tongue-and-groove sandwich panels are typically used on building walls. Multiple tongue-and-groove sandwich panels are spliced ​​together and installed on a steel structure to create the exterior facade of a steel structure. However, building facades often have corners or decorative features. When constructing these structures, tongue-and-groove sandwich panels must be spliced ​​together to create corners. To ensure a more complete joint at these corners, trimming components are often required.

[0003] However, the existing edge trimming parts mainly solve the functions of edge trimming and sealing, and are not beautiful. When the facade has a complex shape, this type of edge trimming part will make the wall edge trimming slightly bloated and expose the self-tapping screws. Utility Model Content

[0004] In view of the above problems, the present application is proposed to provide a sandwich panel wall edge node system with a concave shape to solve the above problems.

[0005] In one embodiment of the present application, a sandwich panel wall edge node system with a concave shape is provided, comprising:

[0006] Building body;

[0007] The sandwich panels are spliced ​​and connected to the building main body to form a building facade with a concave shape; the building facade at the concave shape includes an outer sandwich panel splicing seam; the outer sandwich panel splicing seam includes a transverse splicing seam and a longitudinal splicing seam;

[0008] The edge trimming assembly includes: a first edge trimming piece, a second edge trimming piece, and a third edge trimming piece, wherein the first edge trimming piece and the third edge trimming piece are combined and arranged at the longitudinal splicing seam, and the second edge trimming piece and the third edge trimming piece are combined and arranged at the transverse splicing seam;

[0009] Wherein, the first edge trimming piece and the second edge trimming piece have protruding bending portions, and the bending portions can cover the fasteners on the outer side of the sandwich panel.

[0010] Optionally, when the first edge trimming piece and the third edge trimming piece are combined and arranged in the longitudinal seam, the first edge trimming piece and the third edge trimming piece are respectively located on both sides of the longitudinal seam;

[0011] The first edge trimming piece and the third edge trimming piece each have a bent connecting section, the two connecting sections are stacked on each other and arranged in the longitudinal joint, the fastener passes through the two connecting sections and is connected to the longitudinal joint, and the top of the connecting section is filled with sealant flush with the surface of the sandwich panel.

[0012] Optionally, when the second edge trimming piece and the third edge trimming piece are combined and arranged in the transverse splicing seam, the second edge trimming piece and the third edge trimming piece are respectively located on both sides of the transverse splicing seam;

[0013] The second edge trimming piece has a bent connecting section, and the connecting section of the second edge trimming piece and the connecting section of the third edge trimming piece are stacked on each other and arranged in the transverse splicing seam. The fastener passes through the two connecting sections and is connected to the transverse splicing seam. The top of the connecting section is filled with sealant flush with the surface of the sandwich panel.

[0014] Optionally, the lengths of the connecting sections on the first edge trimming piece, the second edge trimming piece, and the third edge trimming piece are equal to or smaller than the width of the transverse splicing seam or the longitudinal splicing seam.

[0015] Optionally, the distance that the bent portion on the first edge trimming piece protrudes from the surface of the sandwich panel is the same as the distance that the bent portion on the second edge trimming piece protrudes from the surface of the sandwich panel.

[0016] Optionally, the length of the bent portion on the first edge trimming piece is the same as the length of the bent portion on the second edge trimming piece.

[0017] Optionally, a portion of the bent portion on the first edge trimming piece is located on one side of the surface of the sandwich panel, and another portion is located on one side of the end portion of the sandwich panel;

[0018] The bent portion on the second edge trimming piece is located on one side of the surface of the sandwich panel.

[0019] Optionally, it further comprises an edge fastener, wherein the edge fastener is connected to the surface of the sandwich panel via a fastener;

[0020] The ends of the upper bending portion of the first edge trimming piece and the ends of the upper bending portion of the second edge trimming piece are respectively connected to the edge trimming fasteners, and the edge trimming fasteners are respectively located in the covering areas of the bending portions on the first edge trimming piece and the second edge trimming piece.

[0021] Optionally, the first edge trimming piece and the second edge trimming piece further include straight sections, and the straight sections of the first edge trimming piece and the straight sections of the second edge trimming piece are respectively attached to the side walls of the sandwich panel;

[0022] The bent portion and the connecting section on the first edge trimming piece are respectively located on both sides of the straight section; the bent portion and the connecting section on the second edge trimming piece are respectively located on both sides of the straight section.

[0023] Optionally, the building facade at the concave shape also includes an inner sandwich panel joint;

[0024] The connecting section of the third trimming piece is recessed in the inner sandwich panel joint, the planar section of the third trimming piece is attached to the surface of the sandwich panel, and the connecting section is filled with sealant flush with the surface of the sandwich panel.

[0025] In the technical solution provided in the embodiment of the present application, the bending portions on the first edge trimming piece and the second edge trimming piece can respectively cover the fasteners on the sandwich panels at the transverse splicing seams and the longitudinal butt seams. The first edge trimming piece and the second edge trimming piece can not only trim the ends of the sandwich panels and improve the sealing performance of the transverse splicing seams and the longitudinal butt seams, but also effectively improve the aesthetics of the splicing seams of the outer sandwich panels. From the overall perspective, the building facade is also more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 A three-dimensional diagram of a sandwich panel wall edge node system with a concave shape provided in this application;

[0028] Figure 2 for Figure 1 Cross-sectional view in the direction of A;

[0029] Figure 3 for Figure 1 Cross-sectional view in the B direction;

[0030] Figure 4 for Figure 2 Partial view of area C in the middle;

[0031] Figure 5 for Figure 2 Partial view of area D in the middle;

[0032] Figure 6 for Figure 3 Partial view of the middle E area;

[0033] Figure 7 for Figure 3Partial view of area F in the middle;

[0034] Figure 8 for Figure 4 Exploded view of;

[0035] Figure 9 for Figure 5 Exploded view of;

[0036] Figure 10 for Figure 6 Exploded view of;

[0037] Figure 11 for Figure 7 exploded view.

[0038] Description of the accompanying figures:

[0039] Building body 1, columns 11, concave shape 12;

[0040] Sandwich panel 2, outer sandwich panel joint seam 21, transverse joint seam 221, longitudinal joint seam 222, inner sandwich panel joint seam 22;

[0041] First edge trimming member 3, connecting section 31, straight section 32, bent portion 33, flat section 34, sealing gasket 35;

[0042] Second edge trimming piece 4;

[0043] The third edge trimming piece 5, sealant 6, and edge trimming fastener 7. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. The "including" mentioned throughout the specification and claims is an open term and should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. In addition, in the embodiments of the present application, a plurality refers to two or more. Unless there is any contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0045] Figure 1 A three-dimensional diagram of a sandwich panel wall edge node system with a concave shape provided in this application. Figure 2 for Figure 1 Cross-sectional view in the A direction, Figure 3 for Figure 1 Cross-sectional view in the B direction. Figures 1 to 3 In one embodiment of the present application, a sandwich panel wall edge trimming node system with a concave shape is provided. The sandwich panel wall edge trimming node with a concave shape includes: a building body 1, a sandwich panel 2, and an edge trimming assembly. Before introducing the sandwich panel wall edge trimming node, the specific structure of the building body 1 and the specific structure of the concave shape 12 will be introduced below. The building body 1 is usually a steel structure building, which includes steel structure columns 11, purlins, etc. The sandwich panels 2 can be spliced ​​with each other, and the sandwich panels 2 are connected to the steel structure building by self-tapping screws or connecting clips. It can be considered that the sandwich panels 2 are spliced ​​and connected to the building body 1 to form a building facade with a concave shape 12. The concave shape 12 is a square concave structure on the building facade. The four side walls of the concave structure are also paved with sandwich panels 2, and the bottom of the concave structure is also paved with sandwich panels 2. Of course, the structural shape of the concave shape 12 includes but is not limited to: a rectangular parallelepiped, a cube, a cylinder, etc.

[0046] Because the indented shape 12 is located on the building's exterior facade, the exterior facade at the indented shape 12 includes an exterior core panel joint 21. Inner core panel joints are located at the junction of the bottom of the indented structure and the surrounding sidewalls. The exterior core panel joint 21 is more visible than the inner core panel joint 22, so the trimming of the exterior core panel joint 21 is more important, as its aesthetic quality will affect the overall aesthetics of the building's exterior facade.

[0047] Furthermore, the outer sandwich panel joints 21 include transverse joints 221 and longitudinal joints 222. The transverse joints 221 are oriented in the same direction as the transverse direction of the building's exterior facade and can be considered horizontal, while the longitudinal joints 222 are oriented in the same direction as the height of the building's exterior facade. With respect to the longitudinal joints 222, the sandwich panels 2 on either side are arranged in the same direction, i.e., the ends of the sandwich panels 2 on either side of the longitudinal joints 222 butt joint with each other, thereby forming the longitudinal joints 222. With respect to the transverse joints 221, the sandwich panels 2 on either side are arranged in different directions, with the end of the sandwich panel 2 located at the top of the indented shape 12 butting against the transverse side of the sandwich panel 2 located on the building's exterior facade.

[0048] The edge trim assembly includes a first edge trim piece 3, a second edge trim piece 4, and a third edge trim piece 5. The first and third edge trim pieces 3 and 5 are combined and positioned at the longitudinal seam 222, while the second and third edge trim pieces 4 and 5 are combined and positioned at the transverse seam 221. The first and second edge trim pieces 3 and 4 each have a protruding bent portion 33 that conceals fasteners on the exterior of the sandwich panel 2. The bent portions 33 on the first and second edge trim pieces 4, respectively, conceal fasteners on the sandwich panel 2 on the building's exterior facade. The first and second edge trim pieces 3 and 4 abut against each other at the intersection of the transverse seam 221 and the longitudinal seam 222. From the outside, the fasteners on the sandwich panel 2 at the edge of the indented shape 12 are concealed by the bent portions 33 on the first and second edge trim pieces 3 and 4, respectively, leaving only the exposed first and second edge trim pieces 3 and 4 visible, enhancing the building's exterior appearance.

[0049] See also Figure 2 、 Figure 3 、 Figure 4 and Figure 6 In one embodiment provided in the present application, when the first edge trimming piece 3 and the third edge trimming piece 5 are combined and arranged in the longitudinal joint 222, the first edge trimming piece 3 and the third edge trimming piece 5 are respectively located on both sides of the longitudinal joint 222. Specifically, the first edge trimming piece 3 is located on the side close to the building facade, and the third edge trimming piece 5 is located on the side close to the concave shape 12.

[0050] See also Figure 4 and Figure 8 The first and third trimming pieces 3 and 5 each have a curved connecting section 31. The two connecting sections 31 are stacked and positioned within the longitudinal seam 222. Fasteners pass through the two connecting sections 31 and connect to the longitudinal seam 222. Sealant 6 is filled above the connecting sections 31, flush with the surface of the sandwich panel 2. It can be considered that the connecting sections 31 on the first and third trimming pieces 3 and 5 are respectively positioned within the longitudinal seam 222. The depth of their placement within the longitudinal seam 222 can be adjusted based on actual needs. The connecting sections 31 on the first and third trimming pieces 3 and 5 both trim the edges of the sandwich panel 2 on both sides of the longitudinal seam 222 and improve the sealing of the longitudinal seam 222.

[0051] See also Figure 6 and Figure 10When the second and third trim pieces 4 and 5 are combined and arranged in the transverse seam 221, they are located on either side of the transverse seam 221; specifically, the second trim piece 4 is located on the side closest to the building facade, and the third trim piece 5 is located on the side closest to the indented shape 12. The second trim piece 4 has a curved connecting section 31, which is stacked with the connecting section 31 of the third trim piece 5 in the transverse seam 221. Fasteners pass through the two connecting sections 31 and connect to the transverse seam 221. Sealant 6 is filled above the connecting sections 31, flush with the surface of the sandwich panel 2.

[0052] For convenience, the connecting sections 31 on the first, second, and third edge trimming pieces 3, 4, and 5 are positioned within the outer sandwich panel seam 21 or the inner sandwich panel seam 22. The lengths of the connecting sections 31 on the first, second, and third edge trimming pieces 3, 4, and 5 are equal to or less than the width of the transverse seam 221 or the longitudinal seam 222. Typically, the connecting sections 31 on the first, second, and third edge trimming pieces 3, 4, and 5 are of equal length. From a styling perspective, the connecting sections 31 on the first, second, and third edge trimming pieces 3, 4, and 5 can be considered to be bent structures on the first, second, and third edge trimming pieces 3, 4, and 5.

[0053] When the bent portion 33 on the first edge trimming piece 3 and the bent portion 33 on the second edge trimming piece 4 cover the fasteners on the surface of the sandwich panel 2, the bent portion 33 will form a raised structure on the surface of the sandwich panel 2. In order to ensure that the first edge trimming piece 3 and the second edge trimming piece 4 can perfectly mate at the joint of the transverse seam 221 and the longitudinal seam 222. The distance that the bent portion 33 on the first edge trimming piece 3 protrudes from the surface of the sandwich panel 2 is the same as the distance that the bent portion 33 on the second edge trimming piece 4 protrudes from the surface of the sandwich panel 2; the length of the bent portion 33 on the first edge trimming piece 3 is the same as the length of the bent portion 33 on the second edge trimming piece 4. Figure 8 and Figure 10 The height n of the bend 33 on the first edge trimming piece 3 is the same as the width g of the bend 33 on the second edge trimming piece 4. The width m of the bend 33 on the first edge trimming piece 3 is the same as the height h of the bend 33 on the second edge trimming piece 4. Therefore, the raised covering structure formed by the first edge trimming piece 3 on the building facade is the same size as the raised covering structure formed by the second edge trimming piece 4 on the building facade, and the first edge trimming piece 3 and the second edge trimming piece 4 can also better connect at corners.

[0054] See also Figure 4 and Figure 6The bent portion 33 of the first edge trimming piece 3 is partially located on one side of the surface of the sandwich panel 2, and the other part is located on one side of the end of the sandwich panel 2; the bent portion 33 of the second edge trimming piece 4 is located on one side of the surface of the sandwich panel 2. Specifically, the bent portion 33 of the first edge trimming piece 3 is partially located on the building facade, and the other part is located on the end side of the sandwich panel 2 on the building facade; while the bent portion 33 of the second edge trimming piece 4 is entirely located on the building facade.

[0055] Further, see Figure 8 and Figure 10 The first and second edge trimming pieces 3, 4 further include straight sections 32. The straight sections 32 of the first and second edge trimming pieces 3, 4 are respectively attached to the sidewalls of the sandwich panel 2. Specifically, the bent portion 33 and connecting section 31 of the first edge trimming piece 3 are located on either side of the straight section 32, while the bent portion 33 and connecting section 31 of the second edge trimming piece 4 are located on either side of the straight section 32. When the first and second edge trimming pieces 3, 4 are attached to the outer sandwich panel joint 21, the bent portion 33 is bent and connected to one side of the straight section 32, while the connecting section 31 is bent and connected to the other side of the straight section 32. The straight section 32 is attached to the sidewall of the building facade sandwich panel 2, while the bent section bends and extends to the outside of the building facade sandwich panel 2, and the connecting section 31 bends and extends to the inner side of the outer sandwich panel joint 21.

[0056] As can be seen from the above, one end of the first edge trimming piece 3 and the second edge trimming piece 4 is connected to the outer sandwich panel joint 21 through fasteners, so the other ends of the first edge trimming piece 3 and the second edge trimming piece 4 also need to be fixed to ensure that the first edge trimming piece 3 and the second edge trimming piece 4 can be firmly connected to the sandwich panel 2. Figure 4 、 Figure 6 、 Figure 8 and Figure 10 In one embodiment provided in the present application, the concave-shaped sandwich panel wall edge trim node further includes an edge trimming fastener 7, which is connected to the surface of the sandwich panel 2 via fasteners. The ends of the bent portion 33 on the first edge trimming member 3 and the second edge trimming member 4 can be connected to the edge trimming fastener 7, and the edge trimming fastener 7 is located within the covering area of ​​the bent portion 33 on the first edge trimming member 3 and the second edge trimming member 4, respectively. The edge trimming fastener 7 is connected to the surface of the sandwich panel 2 via fasteners (self-tapping screws). When installing the edge trimming fastener 7, it is only necessary to clamp the end of the bent portion 33 into the gap between the end of the edge trimming fastener 7 and the sandwich panel 2. The edge trimming fastener 7 will then abut against the bent portion 33, thereby limiting the end of the bent portion 33.

[0057] Further, see Figures 8 to 11The third edge trimming piece 5 also includes a plane section 34. The connecting portion of the third edge trimming piece 5 is bent and connected to one side of the plane section 34. When the third edge trimming piece 5 is connected to the outer sandwich panel joint 21, the plane section 34 of the third edge trimming piece 5 is adhered to the surface of the sandwich panel 2. A sealing gasket 35 is also provided between the plane section 34 and the surface of the sandwich panel 2, thereby preventing water vapor from entering the outer sandwich panel joint 21 through the gap between the plane section 34 and the sandwich panel 2.

[0058] See also Figure 2 、 Figure 3 、 Figure 5 、 Figure 7 、 Figure 9 and Figure 11 In one embodiment provided herein, the building facade at the inwardly recessed portion 12 also includes an inner sandwich panel joint 22. The trimming and assembly of this inner sandwich panel joint 22 can be accomplished by simply providing a third trimming member 5. Specifically, the connecting section 31 of the third trimming member 5 is recessed within the inner sandwich panel joint 22. The planar section 34 of the third trimming member 5 is attached to the surface of the sandwich panel 2. A sealant 6 is filled above the connecting section 31, flush with the surface of the sandwich panel 2. To enhance the sealing performance of the third trimming member 5, a sealing gasket 35 is provided between the planar section 34 of the third trimming member 5 and the surface of the sandwich panel 2.

[0059] In summary, in the technical solution provided in the embodiments of the present application, the bent portions of the first and second edge trimming members can respectively shield the fasteners on the sandwich panels at the transverse and longitudinal joints. The first and second edge trimming members not only trim the ends of the sandwich panels and improve the sealing performance of the transverse and longitudinal joints, but also effectively enhance the aesthetics of the outer sandwich panel joints, resulting in a more aesthetically pleasing building facade. Furthermore, simply installing a third edge trimming member at the inner sandwich panel joints can simultaneously achieve trimming, sealing, and aesthetic enhancement.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A concave-shaped sandwich panel wall edge node system, characterized in that: include: Building body; Sandwich panels are spliced ​​and connected to the building body to form a building facade with a concave shape; The building facade at the concave shape includes an outer sandwich panel joint; the outer sandwich panel joint includes a transverse joint and a longitudinal joint; The edge trimming assembly includes: a first edge trimming piece, a second edge trimming piece, and a third edge trimming piece, wherein the first edge trimming piece and the third edge trimming piece are combined and arranged at the longitudinal splicing seam, and the second edge trimming piece and the third edge trimming piece are combined and arranged at the transverse splicing seam; Wherein, the first edge trimming piece and the second edge trimming piece have protruding bending portions, and the bending portions can cover the fasteners on the outer side of the sandwich panel.

2. The concave-shaped sandwich panel wall edge node system according to claim 1, characterized in that: When the first edge trimming piece and the third edge trimming piece are combined and arranged in the longitudinal seam, the first edge trimming piece and the third edge trimming piece are respectively located on both sides of the longitudinal seam; The first edge trimming piece and the third edge trimming piece each have a bent connecting section, the two connecting sections are stacked on each other and arranged in the longitudinal joint, the fastener passes through the two connecting sections and is connected to the longitudinal joint, and the top of the connecting section is filled with sealant flush with the surface of the sandwich panel.

3. The concave-shaped sandwich panel wall edge node system according to claim 2, characterized in that: When the second edge trimming piece and the third edge trimming piece are combined and arranged in the transverse splicing seam, the second edge trimming piece and the third edge trimming piece are respectively located on both sides of the transverse splicing seam; The second edge trimming piece has a bent connecting section, and the connecting section of the second edge trimming piece and the connecting section of the third edge trimming piece are stacked on each other and arranged in the transverse splicing seam. The fastener passes through the two connecting sections and is connected to the transverse splicing seam. The top of the connecting section is filled with sealant flush with the surface of the sandwich panel.

4. The concave-shaped sandwich panel wall edge node system according to claim 3, characterized in that: The lengths of the connecting sections on the first edge trimming piece, the second edge trimming piece and the third edge trimming piece are equal to or smaller than the width of the transverse splicing seam or the longitudinal splicing seam.

5. The concave-shaped sandwich panel wall edge node system according to claim 1, characterized in that: The distance that the bent portion on the first edge trimming piece protrudes from the surface of the sandwich panel is the same as the distance that the bent portion on the second edge trimming piece protrudes from the surface of the sandwich panel.

6. The concave-shaped sandwich panel wall edge node system according to claim 5, characterized in that: The length of the bent portion on the first edge trimming piece is the same as the length of the bent portion on the second edge trimming piece.

7. The concave-shaped sandwich panel wall edge node system according to claim 1, characterized in that: A portion of the bent portion on the first edge trimming member is located on one side of the surface of the sandwich panel, and another portion is located on one side of the end portion of the sandwich panel; The bent portion on the second edge trimming piece is located on one side of the surface of the sandwich panel.

8. The concave-shaped sandwich panel wall edge node system according to claim 1, characterized in that: It also includes an edge fastener, which is connected to the surface of the sandwich panel through a fastener; The ends of the upper bending portion of the first edge trimming piece and the ends of the upper bending portion of the second edge trimming piece are respectively connected to the edge trimming fasteners, and the edge trimming fasteners are respectively located in the covering areas of the bending portions on the first edge trimming piece and the second edge trimming piece.

9. The concave-shaped sandwich panel wall edge node system according to claim 3, characterized in that: The first edge trimming member and the second edge trimming member further include straight sections, and the straight sections of the first edge trimming member and the straight sections of the second edge trimming member are respectively attached to the side walls of the sandwich panel; The bent portion and the connecting section on the first edge trimming piece are respectively located on both sides of the straight section; the bent portion and the connecting section on the second edge trimming piece are respectively located on both sides of the straight section.

10. The concave-shaped sandwich panel wall edge node system according to claim 1, characterized in that: The building facade at the concave shape also includes an inner sandwich panel joint; The connecting section of the third trimming piece is recessed in the inner sandwich panel joint, the planar section of the third trimming piece is attached to the surface of the sandwich panel, and the connecting section is filled with sealant flush with the surface of the sandwich panel.

Images