Metal roof board and support bilateral mortise and tenon joint

Abstract

The invention discloses a metal roofing board and support bilateral mortise and tenon connection node which comprises a plurality of mutually connected metal roofing board bodies and further comprises a mortise support, a male rib and a female rib are arranged at the joint of every two adjacent metal roofing board bodies, and a male curled edge rib and a female curled edge rib are arranged at the top of the male rib and the top of the female rib respectively. The male curled edge rib is connected with the female curled edge rib, the middle of the male rib and the middle of the female rib are each provided with a wire sliding groove and a mortise head, the mortise support comprises a support connecting plate and a mortise vertical plate located on the upper portion of the support connecting plate and vertically connected with the support connecting plate, mortises are formed in the two sides of the mortise vertical plate, and the mortise vertical plate is connected with the mortise connecting plate. The mortise is connected with the mortise of the metal roof board body in an inserted mode, and the mortise support is connected with the linear sliding groove and the mortise of the metal roof board body in a telescopic sliding mode. The wind uplift resistance of the metal roof system can be improved, the release performance of the connection temperature telescopic stress of the roof panel and the support is improved, and the wind disaster resistance of the metal roof system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal roofs of steel structure buildings, in particular to a double-sided mortise and tenon joint connection node between a metal roof panel and a support. Background Art

[0002] Metal roofs are mainly used in large-scale public buildings with large spans, such as airports, exhibition halls, and stadiums, as well as the main roof forms of industrial buildings. The connection between the metal roof and the support usually adopts the top crimping connection or lock edge connection of the roof panel ribs. The wind-resistant performance of a single-layer metal roof panel is generally 2-3KPa. The maximum wind load borne by buildings in coastal typhoon landing areas in my country is about 2.5-6KPa. Many metal roofs do not meet the performance requirements of wind-resistant damage. Structural encryption or roof panel reinforcement measures are usually used to solve the problem of insufficient wind-resistant damage performance, but many roofs are still damaged by strong typhoons, causing great property and economic losses.

[0003] At present, under the background of the national "dual carbon" goal, metal roof distributed photovoltaic power stations have become the main application form of roof distributed power stations. According to domestic and foreign research results, the wind load on the roof of the photovoltaic system installed on the upper part of the metal roof will be 1.2-1.5 times higher than that of the roof without the photovoltaic system. Therefore, the higher the wind resistance requirements of the photovoltaic roof, the greater the property and economic losses will be caused if the photovoltaic power station roof is damaged by wind disasters. Therefore, improving the wind resistance of the metal roof is of great significance to the comprehensive promotion of roof distributed power stations in the country. At the same time, it can improve the safety and reliability of the metal roof and reduce the economic losses caused by wind disasters. Summary of the invention

[0004] In order to improve the overall wind-uplift resistance of the metal roof, the present invention proposes a double-sided mortise and tenon connection node between the metal roof panel and the support. The invention can enhance the wind-uplift resistance of the metal roof system, improve the release performance of the temperature expansion and contraction stress of the connection between the roof panel and the support, and enhance the wind disaster resistance of the metal roof system.

[0005] To achieve the above object, the present invention provides the following technical solutions: A double-sided mortise and tenon connection node between a metal roof panel and a support comprises a plurality of metal roof panel bodies connected to each other, and also comprises a mortise and tenon support, wherein the connection points of two adjacent metal roof panel bodies are respectively male ribs and female ribs, wherein the male ribs and female ribs are respectively provided with male curling ribs and female curling ribs at the tops thereof, wherein the male curling ribs and female curling ribs are connected to each other, wherein the middle parts of the male ribs and female ribs are both provided with linear slides and mortises, wherein the mortise and tenon support comprises a support connecting plate, and a mortise and tenon vertical plate located at the upper part of the support connecting plate and vertically connected to the support connecting plate, wherein both sides of the mortise and tenon vertical plate are provided with mortises, wherein the mortise and tenon are plug-in connected to the mortise of the metal roof panel body, and the linear slides and mortises of the mortise and tenon support and the metal roof panel body are telescopically and slidably connected.

[0006] In this solution, the connection between two adjacent metal roof panel bodies is a linear longitudinal connection, and multiple mortise and tenon supports distributed along the longitudinal direction are used as support. The metal roof panel body and the mortise and tenon support are arranged as a mortise and tenon connection, that is, a protruding mortise is arranged on the side of the metal roof panel body, and recessed mortises that match the mortise are arranged on both sides of the mortise and tenon support, and the top of the mortise and tenon vertical plate of the mortise and tenon support is matched with the linear slide groove of the metal roof panel body. The connection between the mortise and the mortise, and the connection between the mortise and tenon vertical plate and the linear slide groove are all slidable connections. Since the connection of the metal roof panel body is the long side, thermal expansion and contraction problems will occur in the longitudinal direction. Therefore, the mortise and tenon support of this solution does not limit the telescopic movement of the metal roof panel body in the longitudinal direction, but can greatly improve the tensile stress resistance, compressive stress resistance, and out-of-plane rotation stress resistance of the plate rib of the metal roof.

[0007] As a preferred solution of the present invention, the mortise is composed of an upper wall plate, a side vertical plate, and a lower wall plate. The upper wall plate and the lower wall plate are respectively connected vertically to the two sides of the side vertical plate and form a protruding mortise on the metal roof panel body. A groove wall plate on the same side as the upper wall plate is provided between the upper wall plate of the mortise and the male curling rib or the female curling rib. The upper wall plate is connected to the end of the groove wall plate and forms a linear slide extending along the longitudinal line of the metal roof panel body. The opening of the linear slide is opposite to the opening of the mortise. The male rib and the female rib of this solution are integrally formed, and the mortise and the linear slide share the upper wall plate as a side, which makes reasonable use of materials and improves the structural strength of the male rib and the female rib of the side vertical plate.

[0008] As a preferred solution of the present invention, the mortise and tenon support is composed of a mortise and tenon upright plate, a male rib mortise and tenon, a female rib mortise and tenon, and a support connecting plate; the male rib mortise and tenon is arranged at the upper part of one side of the mortise and tenon support, the male rib mortise and tenon is composed of a mortise and tenon upright plate, a first upper wall plate and a first lower wall plate punched and folded by the mortise and tenon upright plate, and the male rib mortise and tenon are plug-connected with the male rib mortise of the metal roof panel body; the female rib mortise and tenon is arranged at the two side ends on the other side of the mortise and tenon support, the female rib mortise is composed of a mortise and tenon upright plate, a second upper wall plate and a second lower wall plate punched and folded by the mortise and tenon upright plate, and the female rib mortise is plug-connected with the female rib mortise of the metal roof panel body; the support connecting plate and the female rib mortise are arranged on the same side of the mortise and tenon upright plate, the support connecting plate is provided with a screw connecting hole, and the support connecting plate is connected to the steel purlin by screws; the mortise and tenon support is pressed from a metal plate of 1 to 2 mm.

[0009] As a preferred solution of the present invention, the mortise and tenon support is composed of a mortise and tenon vertical plate, a male rib mortise and tenon, a female rib mortise and tenon, and a support connecting plate; the male rib mortise and tenon is arranged on the upper part of one side of the mortise and tenon support, the male rib mortise and tenon is composed of a mortise and tenon vertical plate, a first upper wall plate and a first lower wall plate, and the male rib mortise and tenon are plug-connected with the male rib mortise of the metal roof panel body; the female rib mortise and tenon is arranged on the other side of the mortise and tenon support, the female rib mortise and tenon is composed of a mortise and tenon vertical plate, a second upper wall plate and a second lower wall plate, and the female rib mortise and tenon are plug-connected with the male rib mortise of the metal roof panel body. The mortise and tenon are plug-connected with the mother rib mortise of the metal roof panel body; the first upper wall panel, the second upper wall panel, the first lower wall panel and the second lower wall panel are respectively perpendicular to the mortise and tenon upright panels and are arranged in the same length as the mortise and tenon upright panels; the support connecting plate and the mother rib mortise are arranged on the same side of the mortise and tenon upright panels, the support connecting plate is provided with screw connection holes, and the support connecting plate is connected to the steel purlin by screws; the mortise and tenon support is cut from thick profiles with a wall thickness of 2 mm to 30 mm processed by extrusion of aluminum alloy or steel.

[0010] The mortise and tenon support of the present invention can be formed by integral extrusion or casting of metal material and then cut twice, or it can be formed by folding a metal plate. A screw connection hole is set on the support connecting plate, and the second lower wall plate and the screw connection hole are staggered to avoid interference with the connection between the screws and the steel purlins on the roof.

[0011] As a preferred solution of the present invention, the male curling rib and the female curling rib are connected to each other by curling, snap-fitting or welding to connect two adjacent metal roof panel bodies to form an integral metal roof.

[0012] As a preferred solution of the present invention, the metal roof panel body is formed by pressing a metal plate with a thickness of 0.5 mm to 0.8 mm.

[0013] As a preferred solution of the present invention, the following installation steps are adopted: positioning and installing the first mortise and tenon support at the edge of the metal roof, installing the starting metal roof panel body, installing the second mortise and tenon support, installing the second metal roof panel body, connecting the male curling ribs and female curling ribs of two adjacent metal roof panel bodies, alternately installing the connecting mortise and tenon supports and the metal roof panel body, and connecting the male curling ribs and the female curling ribs mechanically by curling, biting or welding.

[0014] As a preferred solution of the present invention, when the mortise and tenon support is installed, the male rib mortise of the mortise and tenon support is pushed horizontally on one side to insert the male rib mortise of the metal roof panel body into the male rib mortise of the mortise and tenon support, and then the support connecting plate of the mortise and tenon support is fixed to the steel purlin by screws; when the second metal roof panel body is installed, the female curling rib of the second metal roof panel body is buckled at an angle in the width direction on the upper part of the male curling rib of the first metal roof panel body that has been installed in place, and then the second metal roof panel body is rotated to a horizontal position, and finally the second metal roof panel body is pushed horizontally to place the female rib mortise into the female rib mortise of the mortise and tenon support that has been fixedly installed.

[0015] The double-sided mortise and tenon joint connection node of the metal roof panel and the support of the present invention has tensile stress resistance, compressive stress resistance, and plate rib out-of-plane rotation stress resistance; the tensile stress resistance is to transmit the upward tensile force such as wind load through the side vertical plates and upper wall plates of the male and female plate rib mortise of the metal roof panel body to the upper wall plates of the male and female rib mortise of the mortise support, to the mortise vertical plates, to the support connection plates, to the support connection screws, and then to the upper wing plates of the steel purlins; the compressive stress resistance is to transmit the vertical pressure such as roof snow load and additional layer through the side vertical plates and upper wall plates of the male and female plate rib mortise of the metal roof panel body The vertical plate and the lower wall plate transmit the force to the lower wall plate of the male and female rib tenons of the mortise and tenon support, to the mortise and tenon vertical plate, to the support connecting plate, to the support connecting screws, and then to the upper wing plate of the steel purlin; the out-of-plane rotational force performance of the plate rib is to transfer the out-of-plane rotational force of the metal roof panel bottom plate on the roof panel rib caused by the upward wind suction through the male and female rib tenons of the metal roof panel body, the upper wall plate, the side vertical plate, and the lower wall plate to the male and female rib tenons of the mortise and tenon support, forming self-balancing or through transmitting to the mortise and tenon vertical plate, to the support connecting plate, to the support connecting screws, and then to the upper wing plate of the steel purlin.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention changes the connection mode and anti-pulling force transmission mode of the traditional metal roof panel support, and invents a new type of double-sided mortise and tenon connection node between the metal roof panel and the support, which has the force-bearing performance of tensile and compressive resistance, and improves the wind-resistant force-bearing performance of the metal roof; 2. The present invention solves the problem of the bearing curling connecting piece or the bite joint being disengaged and damaging the connection node with weak force, and invents a new strong force connection node that can strongly constrain the buckling failure of the metal roof panel on both sides of the bearing, thereby improving the force performance of the connection between the metal roof and the bearing; 3. The present invention reduces the anti-wind rotation moment of the double-sided plate ribs of the metal roof panel, optimizes the moment from the top of the plate rib to the middle moment, and reduces the moment by about 50%, thereby improving the bearing capacity of the metal roof panel against the out-of-plane rotation damage of the metal roof panel ribs under the action of wind suction, and improves the wind resistance performance of the support by 50%-80%; 4. The present invention solves the problem that the 20-40mm limit slip of ordinary roof supports cannot meet the performance requirements of temperature stress release of super-long roof panels with a length of more than 50 meters, and invents a connection technology for the sliding of the fixed support and the longitudinal wire trough of the roof panel; 5. The present invention proposes an installation technology for double-sided mortise and tenon connection between metal roof panels and roof supports, which improves the installation efficiency of metal roof panels and ensures the construction quality of mortise and tenon connection nodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of the present invention.

[0018] Figure 2 The figure is a schematic diagram of a node structure of the present invention.

[0019] Figure 3 This is another schematic diagram of a node structure of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the male ribs of the metal roof panel body of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the mother rib of the metal roof panel body of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the mortise and tenon support of the present invention.

[0023] Figure 7 for Figure 6 Schematic diagram of the three-dimensional structure of the male rib of the middle tenon support.

[0024] Figure 8 for Figure 6 Schematic diagram of the three-dimensional structure of the middle tenon groove support mother rib.

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the second type of mortise and tenon support male rib of the present invention.

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the second type of tenon and groove support mother rib of the present invention.

[0027] Fig.11 It is a schematic diagram of the three-dimensional structure of the third type of the mortise and tenon support male rib of the present invention.

[0028] Fig.12 It is a schematic diagram of the three-dimensional structure of the third type of tenon and groove support mother rib of the present invention.

[0029] Fig.13 It is a schematic diagram of a structural explosion of the present invention.

[0030] Fig.14 It is a schematic diagram of the first step of the installation process of the present invention.

[0031] Fig.15 It is a schematic diagram of the second step of the installation process of the present invention.

[0032] Fig.16 It is a schematic diagram of the third step of the installation process of the present invention.

[0033] Fig.17 It is a schematic diagram of the fourth step of the installation process of the present invention.

[0034] Fig.18 It is a schematic diagram of the fifth step of the installation process of the present invention.

[0035] Fig.19 It is a schematic diagram of the sixth step of the installation process of the present invention.

[0036] In the figure: 1. Metal roof panel body 2. Tenon and groove support 3. Male rib 4. Female rib 5. Male curling rib 6. Female curling rib 7. Line slide 8. Mortise 9. Screws 10. Steel purlins 11. Support pads 21. Support connecting plates 22. Mortise and tenon vertical plate 23. Male rib mortise and tenon 24. Female rib mortise and tenon 25, first upper wall plate 26, first lower wall plate 27, second upper wall plate 28, second lower wall plate 29, screw connection hole 71, groove wall plate 81. Upper wall panel 82. Side panels 83. Lower wall panel. DETAILED DESCRIPTION

[0037] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0040] See also Figure 1-Figure 12 , the present invention provides a technical solution: A double-sided mortise and tenon connection node between a metal roof panel and a support, comprising a plurality of metal roof panel bodies 1 connected to each other, and a mortise and tenon support 2, wherein the connection between two adjacent metal roof panel bodies 1 is respectively a male rib 3 and a female rib 4, wherein the tops of the male ribs 3 and the female ribs 4 are respectively provided with a male curling rib 5 and a female curling rib 6, wherein the male curling rib 5 and the female curling rib 6 are connected to each other, wherein the middle parts of the male ribs 3 and the female ribs 4 are both provided with a linear slide groove 7 and a mortise 8, and the mortise and tenon support 2 comprises a support connecting plate 21, and a mortise and tenon vertical plate 22 located at the upper part of the support connecting plate 21 and vertically connected to the support connecting plate 21, wherein both sides of the mortise and tenon vertical plate 22 are provided with mortise, wherein the mortise and tenon are plug-connected to the mortise 8 of the metal roof panel body 1, and the mortise and tenon support 2 is telescopically and slidably connected to the linear slide groove 7 and the mortise 8 of the metal roof panel body 1.

[0041] like Figure 4-Figure 5 As shown, the mortise 8 is composed of an upper wall plate 81, a side vertical plate 82, and a lower wall plate 83. The upper wall plate 81 and the lower wall plate 83 are respectively vertically connected to the two sides of the side vertical plate 82 and form a protruding mortise 8 on the metal roof panel body 1. A groove wall plate 71 on the same side as the upper wall plate 81 is provided between the upper wall plate 81 of the mortise 8 and the male curling rib 5 or the female curling rib 6. The upper wall plate 81 is connected to the end of the groove wall plate 71 to form a line slide 7 extending along the longitudinal line of the metal roof panel body 1. The opening of the line slide 7 is opposite to the opening of the mortise 8.

[0042] In one case, if Figure 6-Figure 10As shown, the mortise and tenon support 2 is composed of a mortise and tenon vertical plate 22, a male rib mortise and tenon 23, a female rib mortise and tenon 24, and a support connecting plate 21; the male rib mortise and tenon 23 is arranged at the upper part of one side of the mortise and tenon support 2, and the male rib mortise and tenon 23 is composed of a mortise and tenon vertical plate 22, a first upper wall plate 25 and a first lower wall plate 26 that is punched and folded by the mortise and tenon vertical plate 22, and the male rib mortise and tenon 23 is plugged and connected with the male rib 3 mortise 8 of the metal roof panel body 1; the female rib mortise and tenon 24 is arranged on both side ends of the other side of the mortise and tenon support 2, and the female rib mortise and tenon 24 is composed of the mortise and tenon vertical plate 22, the first upper wall plate 25 and the first lower wall plate 26 that is punched and folded by the mortise and tenon vertical plate 22. The second upper wall panel 27 and the second lower wall panel 28 which is stamped and folded by the mortise and tenon vertical panel 22 are composed; the mother rib mortise and tenon 24 is plug-connected with the mother rib 4 mortise 8 of the metal roof panel body 1; the support connecting plate 21 and the mother rib mortise and tenon 24 are arranged on the same side of the mortise and tenon vertical panel 22; the support connecting plate 21 is provided with a screw connecting hole 29; the support connecting plate 21 is connected to the steel purlin 10 by screws 9; the mortise and tenon support 2 is pressed from a metal plate with a thickness of 1 to 2 mm; a support pad 11 can be arranged between the support connecting plate 21 and the steel purlin 10 for insulation.

[0043] In another case, if Fig.11 , Fig.12 As shown, the mortise and tenon support 2 is composed of a mortise and tenon vertical plate 22, a male rib mortise and tenon 23, a female rib mortise and tenon 24, and a support connecting plate 21; the male rib mortise and tenon 23 is arranged at the upper part of one side of the mortise and tenon support 2, and the male rib mortise and tenon 23 is composed of the mortise and tenon vertical plate 22, a first upper wall plate 25 and a first lower wall plate 26, and the male rib mortise and tenon 23 is plugged and connected with the male rib 3 mortise 8 of the metal roof panel body 1; the female rib mortise and tenon 24 is arranged on the other side of the mortise and tenon support 2, and the female rib mortise and tenon 24 is composed of the mortise and tenon vertical plate 22, a second upper wall plate 27 and a second lower wall plate 28, and the female rib mortise and tenon 24 is plugged and connected with the female rib 4 mortise of the metal roof panel body 1 The head 8 is plug-in connected; the first upper wall plate 25, the second upper wall plate 27, the first lower wall plate 26, and the second lower wall plate 28 are respectively perpendicular to the tenon groove vertical plate 22 and are arranged throughout the length of the tenon groove vertical plate 22; the support connecting plate 21 and the mother rib tenon groove 24 are arranged on the same side of the tenon groove vertical plate 22, and the support connecting plate 21 is provided with a screw connection hole 29, and the support connecting plate 21 is connected to the steel purlin 10 by screws 9; the tenon groove support 2 is made of aluminum alloy or steel extruded into a thick profile with a wall thickness of 2 mm to 30 mm and cut; a support pad 11 can be arranged between the support connecting plate 21 and the steel purlin 10 for insulation.

[0044] The male curling rib 5 and the female curling rib 6 are connected to each other by curling, buckling, locking or welding to connect two adjacent metal roof panel bodies 1 to form an integral metal roof.

[0045] The metal roof panel body 1 is formed by pressing a metal plate with a thickness of 0.5 mm to 0.8 mm.

[0046] The specific implementation process is as follows: Figure 13-Figure 19The following installation steps are adopted: the first tongue-and-groove support 2 at the edge of the metal roof is positioned and installed, the starting metal roof panel body 1 is installed, the second tongue-and-groove support 2 is installed, the second metal roof panel body 1 is installed, the male curling rib 5 of two adjacent metal roof panel bodies 1 is connected with the female curling rib 6, the connecting tongue-and-groove support 2 and the metal roof panel body 1 are installed alternately, and the male curling rib 5 and the female curling rib 6 are connected by mechanical curling, biting or welding.

[0047] When the mortise and tenon support 2 is installed, the male rib mortise 23 of the mortise and tenon support 2 is pushed horizontally on one side to insert the male rib 3 mortise 8 of the metal roof panel body 1 into the male rib mortise 23 of the mortise and tenon support 2, and then the support connecting plate 21 of the mortise and tenon support 2 is fixed to the steel purlin 10 by screws 9; when the second metal roof panel body 1 is installed, the female curling rib 6 of the second metal roof panel body 1 is buckled at an angle in the plate width direction on the upper part of the male curling rib 5 of the first metal roof panel body 1 that has been installed in place, and then the second metal roof panel body 1 is rotated to a horizontal state, and finally the second metal roof panel body 1 is pushed horizontally to place the female rib 4 mortise 8 into the female rib mortise 24 of the mortise and tenon support 2 that has been fixedly installed.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-sided mortise and tenon joint between a metal roof panel and a support, comprising a plurality of interconnected metal roof panel bodies, characterized in that: It also includes a mortise and tenon support, wherein the connection between two adjacent metal roof panel bodies is respectively a male rib and a female rib, wherein the tops of the male ribs and the female ribs are respectively provided with a male curling rib and a female curling rib, wherein the male curling rib and the female curling rib are connected to each other, wherein the middle parts of the male ribs and the female ribs are provided with a linear slide groove and a mortise, wherein the mortise and tenon support includes a support connecting plate, a mortise and tenon vertical plate located at the upper part of the support connecting plate and vertically connected to the support connecting plate, wherein both sides of the mortise and tenon vertical plate are provided with mortise, wherein the mortise and tenon are plug-in connected to the mortise of the metal roof panel body, and the mortise and tenon support is telescopically and slidably connected to the linear slide groove and the mortise of the metal roof panel body.

2. According to claim 1, a double-sided mortise and tenon joint between a metal roof panel and a support, characterized in that: The mortise is composed of an upper wall plate, a side vertical plate, and a lower wall plate. The upper wall plate and the lower wall plate are respectively vertically connected to the two sides of the side vertical plates and form a protruding mortise on the metal roof panel body. A groove wall plate on the same side as the upper wall plate is provided between the upper wall plate of the mortise and the male curling rib or the female curling rib. The upper wall plate is connected to the end of the groove wall plate to form a linear slide extending along the longitudinal line of the metal roof panel body, and the opening of the linear slide is opposite to the opening of the mortise.

3. According to claim 1, a double-sided mortise and tenon joint between a metal roof panel and a support, characterized in that: The mortise and tenon support is composed of a mortise and tenon vertical plate, a male rib mortise and tenon, a female rib mortise and tenon, and a support connecting plate; the male rib mortise and tenon is arranged at the upper part of one side of the mortise and tenon support, the male rib mortise and tenon is composed of a mortise and tenon vertical plate, a first upper wall plate and a first lower wall plate that is punched and folded by the mortise and tenon vertical plate, and the male rib mortise and tenon are plug-connected with the male rib mortise of the metal roof panel body; the female rib mortise and tenon is arranged at the two side ends on the other side of the mortise and tenon support, the female rib mortise is composed of a mortise and tenon vertical plate, a second upper wall plate and a second lower wall plate that is punched and folded by the mortise and tenon vertical plate, and the female rib mortise and tenon are plug-connected with the female rib mortise of the metal roof panel body; the support connecting plate and the female rib mortise are arranged on the same side of the mortise and tenon vertical plate, the support connecting plate is provided with a screw connecting hole, and the support connecting plate is connected to the steel purlin by screws; the mortise and tenon support is pressed from a metal plate of 1 to 2 mm.

4. According to claim 1, a double-sided mortise and tenon joint between a metal roof panel and a support, characterized in that: The mortise and tenon support is composed of a mortise and tenon vertical plate, a male rib mortise and tenon, a female rib mortise and tenon, and a support connecting plate; the male rib mortise and tenon is arranged on the upper part of one side of the mortise and tenon support, the male rib mortise and tenon is composed of a mortise and tenon vertical plate, a first upper wall plate and a first lower wall plate, and the male rib mortise and tenon are plug-connected with the male rib mortise of the metal roof panel body; the female rib mortise and tenon is arranged on the other side of the mortise and tenon support, the female rib mortise and tenon is composed of a mortise and tenon vertical plate, a second upper wall plate and a second lower wall plate, and the female rib mortise and tenon are plug-connected with the metal roof panel body The mother rib mortise of the roof panel body is plug-connected; the first upper wall panel, the second upper wall panel, the first lower wall panel and the second lower wall panel are respectively perpendicular to the mortise and tenon uprights and are arranged in the same length as the mortise and tenon uprights; the support connecting plate and the mother rib mortise are arranged on the same side of the mortise and tenon uprights, the support connecting plate is provided with screw connection holes, and the support connecting plate is connected to the steel purlin by screws; the mortise and tenon support is cut from thick profiles with a wall thickness of 2 mm to 30 mm processed by extrusion of aluminum alloy or steel.

5. According to claim 1, a double-sided mortise and tenon joint between a metal roof panel and a support, characterized in that: The male curling rib and the female curling rib are connected to each other by curling, buckling, locking or welding to connect two adjacent metal roof panel bodies to form an integral metal roof.

6. According to claim 1, a double-sided mortise and tenon joint between a metal roof panel and a support, characterized in that: The metal roof panel body is formed by pressing a metal plate with a thickness of 0.5 mm to 0.8 mm.

7. A double-sided mortise and tenon joint between a metal roof panel and a support according to any one of claims 1 to 6, characterized in that: The following installation steps are adopted: positioning and installing the first tongue-and-groove support at the edge of the metal roof, installing the starting metal roof panel body, installing the second tongue-and-groove support, installing the second metal roof panel body, connecting the male curling ribs and the female curling ribs of two adjacent metal roof panel bodies, alternately installing the connecting tongue-and-groove support and the metal roof panel body, and connecting the male curling rib and the female curling rib by mechanical curling, biting or welding.

8. The connection and installation of a metal roof panel and a mortise and tenon support according to claim 7, characterized in that: When the mortise and tenon support is installed, the male rib mortise of the mortise and tenon support is pushed horizontally on one side to insert the male rib mortise of the metal roof panel body into the male rib mortise of the mortise and tenon support, and then the support connecting plate of the mortise and tenon support is fixed to the steel purlin by screws; when the second metal roof panel body is installed, the female curling rib of the second metal roof panel body is buckled with an inclination in the width direction on the upper part of the male curling rib of the first metal roof panel body that has been installed in place, and then the second metal roof panel body is rotated to a horizontal position, and finally the second metal roof panel body is pushed horizontally to place the female rib mortise into the female rib mortise of the mortise and tenon support that has been fixed and installed.

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