Roofing panel construction and concealed mechanical fastening method

Abstract

This invention relates to the field of construction and specifically discloses a roof panel structure and its concealed mechanical fixing method. By using a roof panel with raised sections, during the splicing and installation of the roof panels, the raised sections cover the snap-fit ​​parts of adjacent roof panels and the outer side of the sliding brackets that snap to them, achieving concealed installation of the sliding brackets and self-tapping screws, reducing the erosion of the sliding brackets and self-tapping screws by rainwater and dust. Simultaneously, the roof panel is composed of a metal substrate and thermoplastic board composite, and the roof panels are connected by a heat-fusion fixing method, forming a continuous waterproof interface, further improving the waterproof sealing performance of the roof structure. Furthermore, through the sliding brackets with longitudinal grooves, the snap-fit ​​parts with bends, and the raised sections, the roof panels deform longitudinally and laterally along the sliding brackets when the roof structure undergoes thermal expansion and contraction, reducing stress concentration caused by thermal expansion and contraction in the roof structure.

Description

Technical Field

[0001] This invention relates to the field of construction, and more specifically, to a roof panel structure and its concealed mechanical fixing method. Background Technology

[0002] Traditional roof panels are mostly fixed with exposed self-tapping screws, which has significant drawbacks: the sealing performance at the boundary overlap is weak, and leakage channels are easily formed after long-term use; the mounting holes formed by the contact between the screw and the panel are exposed to the environment, and rainwater and dust can easily penetrate and cause metal corrosion, which in turn leads to fixing failure; in addition, the thermal expansion and contraction characteristics of metal materials will create stress concentration around the screw holes, which can easily cause the panel to tear along the mounting holes in areas with drastic temperature changes. These problems not only affect the waterproof performance of the building, but also shorten the service life of the roof system and increase the later maintenance costs. Summary of the Invention

[0003] 1. Technical problems to be solved

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a roof panel structure and its concealed mechanical fixing method, which can achieve concealed installation of self-tapping screws and form an integrated waterproof layer on the roof structure.

[0005] 2. Technical Solution

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A roof panel structure includes multiple roof panels. The right end of the roof panel is provided with a snap-fit ​​part, which snaps into a sliding bracket. The sliding bracket has a longitudinal groove for the snap-fit ​​part to slide longitudinally. The sliding bracket is fixedly connected to the building base by self-tapping screws. The left end of the roof panel away from the snap-fit ​​part is provided with an outwardly protruding bulge. The bulge is used to cover the snap-fit ​​part of the adjacent roof panel and the outside of the sliding bracket snapped with it.

[0008] The roof panel includes a metal substrate and a thermoplastic sheet fixed to the outer surface of the metal substrate. The length of the thermoplastic sheet near the raised portion is greater than the length of the metal substrate on the same side. Adjacent roof panels are fixedly connected by heat fusion. The left end of the right roof panel abuts between the raised portion and the snap-fit ​​portion of the left roof panel, and the abutting position of the two is fixedly connected by heat fusion.

[0009] As a further embodiment of the present invention, a sliding bracket is provided with a sliding bolt that is slidably connected to it in the longitudinal direction. The sliding bolt is threadedly connected to the snap-fit ​​part, and a waist hole is provided on the sliding bracket for the sliding bolt to slide.

[0010] As a further embodiment of the present invention, the cross-section of the raised portion is trapezoidal or semi-circular, and the snap-fit ​​portion also includes a support portion integrally formed with the bent portion, the support portion being disposed opposite to the inner wall of the raised portion.

[0011] As a further embodiment of the present invention, the sliding bracket includes an integrally formed horizontal part and an inverted U-shaped part. The horizontal part has a through hole for a self-tapping screw to pass through. The snap-fit ​​part includes a bent part, which includes two U-shaped parts. One U-shaped part is snapped into the inverted U-shaped part, and the other U-shaped part is wrapped around the outer end of the inverted U-shaped part away from the horizontal part.

[0012] As a further embodiment of the present invention, the waist hole is formed on the side wall of the inverted U-shaped part, and the bent part is provided with a threaded hole that cooperates with the sliding bolt. The sliding bolt has a multi-stage frustum structure, which includes an integrally formed threaded part, a sliding part and a limiting part. The threaded part is threadedly connected to the threaded hole, the sliding part is slidably nested in the waist hole, and the limiting part slidably abuts against the outer wall of the inverted U-shaped part.

[0013] As a further embodiment of the present invention, a pair of rubber sleeves are snapped into the waist hole, and both rubber sleeves abut against both sides of the sliding part. An arc-shaped groove that cooperates with the sliding part is opened on the opposite side of the pair of rubber sleeves, and a through hole is opened through the rubber sleeves.

[0014] As a further embodiment of the present invention, the metal substrate is made of aluminum-zinc coated steel plate, the thermoplastic plate is made of thermoplastic polyolefin elastomer or polyvinyl chloride, the thickness of the metal substrate is 0.7 mm, the thickness of the thermoplastic plate is 2.0 mm, the metal substrate and the thermoplastic plate are formed into a roof panel by hot pressing, and the sliding bracket is made of aluminum alloy material and its surface is coated with a polyurethane wear-resistant coating.

[0015] A concealed mechanical fixing method for a roof panel structure includes the following steps:

[0016] Step 1: Fix multiple sliding brackets to the building base at the designed distance using self-tapping screws;

[0017] Step 2: Engage the snap-fit ​​parts of multiple roof panels into the longitudinal grooves of the corresponding sliding brackets, and ensure that the raised parts of adjacent roof panels cover the outer side of the snap-fit ​​parts of adjacent roof panels.

[0018] Step 3: Use a hot air welding machine to perform hot melt welding on the joint of adjacent roof panels to form a welded joint.

[0019] 3. Beneficial Effects

[0020] Compared with the prior art, the advantages of this invention are:

[0021] (1) The present invention uses a roof panel with a raised part, so that when the roof panel is spliced ​​and installed, the raised part covers the snap-fit ​​part of the adjacent roof panel and the outside of the sliding bracket snap-fitted with it, thereby realizing the hidden installation of the sliding bracket and the self-tapping screw, reducing the erosion of the sliding bracket and the self-tapping screw by rainwater and dust.

[0022] (2) The present invention uses a roof panel composed of a metal substrate and a thermoplastic board, and connects the roof panels by hot-melt fixing to form a continuous waterproof interface, thereby further improving the waterproof sealing performance of the roof structure.

[0023] (3) The present invention uses a sliding bracket with a longitudinal groove and a snap-fit ​​part to engage with it, so that when the roof structure expands and contracts with heat, the roof panel deforms longitudinally along the sliding bracket, reducing the stress concentration caused by thermal expansion and contraction of the roof structure, reducing the probability of shearing and tearing of the roof panel at the self-tapping screw installation point, and improving the stability of the connected roof structure.

[0024] (4) The present invention uses a sliding bracket with an inverted U-shaped part and a snap-fit ​​part with a bent part. When the roof panel expands and contracts due to heat, the bent part undergoes elastic deformation in the transverse direction of the roof panel, which further reduces stress concentration.

[0025] (5) The present invention provides a longitudinal limit for the roof panel by providing a sliding bolt and a rubber sleeve, and improves the stability of the connection between the roof panel and the sliding bolt. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the transverse cross-sectional structure of the present invention;

[0028] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0029] Figure 4 This is a cross-sectional structural diagram of the roof panel in this invention;

[0030] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0031] Figure 6 This is a cross-sectional view of the sliding bracket in this invention;

[0032] Figure 7 This is a schematic diagram of the snap-fit ​​structure between the sliding parts and the snap-fit ​​part in this invention;

[0033] Figure 8This is a schematic diagram of the exploded assembly structure of the sliding bolt in this invention;

[0034] Figure 9 for Figure 9 Enlarged structural diagram at point C;

[0035] Figure 10 This is a schematic diagram illustrating the state of the roof panel during thermal expansion and contraction in this invention.

[0036] The following are the labels in the diagram: 1. Roof panel; 101. Metal substrate; 102. Thermoplastic sheet; 103. Welded section; 2. Sliding bracket; 201. Through hole; 202. Waist hole; 203. Horizontal section; 204. Inverted U-shaped section; 3. Self-tapping screw; 4. Building base; 5. Raised section; 6. Snap-fit ​​section; 601. Bending section; 602. Support section; 603. Threaded hole; 7. Sliding bolt; 701. Threaded section; 702. Sliding section; 703. Limiting section; 8. Rubber sleeve; 801. Arc groove; 802. Through hole. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Please see Figures 1-7In one embodiment of the present invention, a roof panel type structure includes a plurality of roof panels 1. The right end of the roof panel 1 is provided with a snap-fit ​​part 6, which snaps onto a sliding bracket 2. The sliding bracket 2 has a longitudinal groove for the snap-fit ​​part 6 to slide longitudinally. The sliding bracket 2 is fixedly connected to the building base 4 by self-tapping screws 3. The left end of the roof panel 1 away from the snap-fit ​​part 6 is provided with an outwardly protruding bulge 5, which is used to cover the snap-fit ​​part 6 of the adjacent roof panel 1 and the outside of the sliding bracket 2 snapped onto it.

[0041] The roof panel 1 includes a metal substrate 101 and a thermoplastic sheet 102 fixed to the outer surface of the metal substrate 101. The length of the end of the thermoplastic sheet 102 near the raised portion 5 is greater than the length of the metal substrate 101 on the same side. Adjacent roof panels 1 are fixedly connected by heat fusion. The left end of the right roof panel 1 abuts between the raised portion 5 and the snap-fit ​​portion 6 of the left roof panel 1, and the abutting position of the two is fixedly connected by heat fusion.

[0042] Compared to traditional roof panel structures, this invention features a roof panel 1 with raised portions 5. During the splicing and installation of the roof panels 1, the raised portions 5 cover the outer side of the interlocking portions 6 of adjacent roof panels 1 and the sliding brackets 2 that interlock with them, achieving concealed installation of the sliding brackets 2 and self-tapping screws 3, reducing the erosion of the sliding brackets 2 and self-tapping screws 3 by rainwater and dust. Simultaneously, the roof panel 1, composed of a metal substrate 101 and a thermoplastic sheet 102, is connected using a hot-melt fixing method, forming a continuous waterproof interface and further improving the waterproof sealing performance of the roof structure. Furthermore, the sliding brackets 2 with longitudinal grooves and the interlocking portions 6 allow the roof panels 1 to deform longitudinally along the sliding brackets 2 during thermal expansion and contraction, reducing stress concentration caused by thermal expansion and contraction, lowering the probability of shear tearing of the roof panels 1 at the self-tapping screw installation points, and improving the stability of the connected roof structure.

[0043] Please see Figure 5 , Figure 6 and Figure 7 The sliding bracket 2 includes an integrally formed horizontal part 203 and an inverted U-shaped part 204. The horizontal part 203 has a through hole 201 for the self-tapping screw 3 to pass through. The snap-fit ​​part 6 includes a bent part 601, which includes two U-shaped parts. One U-shaped part is snapped into the inverted U-shaped part 204, and the other U-shaped part is wrapped around the outer end of the inverted U-shaped part 204 away from the horizontal part 203.

[0044] Specifically, through the snap-fit ​​part 6 with the bent part 601 and the sliding bracket 2 with the inverted U-shaped part 204, the bent part 601 has good toughness and can undergo elastic deformation when the roof panel 1 expands and contracts with heat, further reducing the stress concentration of the roof panel 1.

[0045] Please see Figure 2 The raised section has a trapezoidal or semi-circular cross-section.

[0046] Specifically, the raised portion 5 and the bent portion 601 work together to increase the elastic deformation of the roof panel 1 during thermal expansion and contraction. In addition, the raised portion 5, with a trapezoidal or semi-circular cross-section, has a good impact force dispersion effect and works with the bent portion 601 to give the roof panel 1 good impact resistance.

[0047] Please see Figure 7 The snap-fit ​​portion 6 also includes a support portion 602 integrally formed with the bending portion 601, and the support portion 602 is disposed opposite to the inner wall of the raised portion 5.

[0048] Specifically, when the raised portion 5 is under pressure, the raised portion 5 transmits the pressure to the bent portion 601 through the support portion 602, thereby further improving the pressure resistance of the raised portion 5.

[0049] In this embodiment, the metal substrate 101 is made of aluminum-zinc coated steel sheet, and the thermoplastic sheet 102 is made of thermoplastic polyolefin elastomer or polyvinyl chloride.

[0050] Specifically, thermoplastic sheets 102 made of thermoplastic polyolefin elastomer or polyvinyl chloride have good waterproof properties and are easy to hot melt bond.

[0051] A concealed mechanical fixing method for a roof panel structure includes the following steps:

[0052] Step 1: Fix multiple sliding brackets 2 to the building base 4 at the designed distance using self-tapping screws 3;

[0053] Step 2: Engage the snap-fit ​​parts 6 of multiple roof panels 1 into the longitudinal grooves of the corresponding sliding brackets 2, and make the raised parts 5 of adjacent roof panels 1 cover the outside of the snap-fit ​​parts 6 of adjacent roof panels 1.

[0054] Step 3: Use a hot air welding machine to perform hot melt welding on the joint of adjacent roof panels 1 to form a welded part 103 at the joint of adjacent roof panels 1.

[0055] Specifically, the sliding bracket 2 is first fixed by self-tapping screws 3, then one end of the roof panel 1 is fixed by snap-fit ​​part 6, and finally the adjacent roof panels 1 are fixed by hot melt welding, which makes the installation operation simple and accurate and facilitates the formation of an integrated waterproof interface.

[0056] In this embodiment, the metal substrate 101 has a thickness of 0.7 mm and the thermoplastic sheet 102 has a thickness of 2.0 mm. The metal substrate 101 and the thermoplastic sheet 102 are formed into the roof panel 1 by hot pressing.

[0057] In this embodiment, when the hot air welding machine performs hot melting processing on the adjacent roof panel 1, the temperature is 200 degrees Celsius and the pressure is 0.8 MPa.

[0058] In this embodiment, the sliding bracket 2 is made of aluminum alloy and its surface is coated with a polyurethane wear-resistant coating.

[0059] Please see Figures 7-10 In another embodiment of the present invention, based on the previous embodiment, the sliding bracket 2 is provided with a sliding bolt 7 that is slidably connected to it in the longitudinal direction. The sliding bolt 7 is threadedly connected to the snap-fit ​​part 6. The sliding bracket 2 is provided with a waist hole 202 for the sliding bolt 7 to slide.

[0060] Specifically, the roof panel 1 is limited by the sliding bolt 7. When the roof panel 1 expands and contracts with heat, the sliding bolt 7 on the roof panel 1 slides longitudinally along the waist hole 202, so that the roof panel 1 has a large elastic deformation space in the longitudinal direction.

[0061] Please see Figure 7 and Figure 9 The waist hole 202 is opened on the side wall of the inverted U-shaped part 204. The bent part 601 is provided with a threaded hole 603 that mates with the sliding bolt 7. The sliding bolt 7 has a multi-stage frustum structure, which includes an integrally formed threaded part 701, a sliding part 702 and a limiting part 703. The threaded part 701 is threadedly connected to the threaded hole 603, the sliding part 702 is slidably nested in the waist hole 202, and the limiting part 703 slidably abuts against the outer wall of the inverted U-shaped part 204.

[0062] Specifically, the sliding bolt 7 is limited by the limiting part 703, which improves the stability of the connection between the snap-fit ​​part 6 and the sliding bracket 2.

[0063] Please see Figure 9 A pair of rubber sleeves 8 are engaged inside the waist hole 202. Both rubber sleeves 8 abut against both sides of the sliding part 702. An arc-shaped groove 801 that cooperates with the sliding part 702 is opened on the opposite side of the pair of rubber sleeves 8. A through hole 802 is opened through the rubber sleeve 8.

[0064] Specifically, a pair of rubber sleeves 8 limit the sliding bolt 7 to the middle position of the waist hole 202 and squeeze and lock the sliding bolt 7, reducing the probability of the sliding bolt 7 loosening and improving the stability of the sliding bolt 7 connection. When the roof panel 1 slides longitudinally, the sliding bolt 7 squeezes the rubber sleeve 8, and the through hole 802 is compressed.

[0065] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A method of concealed mechanical fastening of roof panel type structures, characterized in that, Its roof panel structure includes multiple roof panels (1). The right end of the roof panel (1) is provided with a snap-fit ​​part (6). The snap-fit ​​part (6) snaps with a sliding bracket (2). The sliding bracket (2) is provided with a longitudinal groove for the snap-fit ​​part (6) to slide longitudinally. The sliding bracket (2) is fixedly connected to the building base (4) by self-tapping screws (3). The left end of the roof panel (1) away from the snap-fit ​​part (6) is provided with an outward protruding bulge (5). The bulge (5) is used to cover the snap-fit ​​part (6) of the adjacent roof panel (1) and the outside of the sliding bracket (2) snapped with it. The roof panel (1) includes a metal substrate (101) and a thermoplastic sheet (102) fixed on the outer surface of the metal substrate (101). The length of the thermoplastic sheet (102) near the raised part (5) is greater than the length of the metal substrate (101) on the same side. Adjacent roof panels (1) are fixedly connected by a heat-melting connection. The left end of the right roof panel (1) abuts between the raised part (5) and the snap-fit ​​part (6) of the left roof panel (1), and the abutting position of the two is fixedly connected by a heat-melting connection. The sliding bracket (2) includes an integrally formed horizontal part (203) and an inverted U-shaped part (204). The horizontal part (203) has a through hole (201) for a self-tapping screw (3) to pass through. The snap-fit ​​part (6) includes a bent part (601). The bent part (601) includes two U-shaped parts, one of which is snapped into the inverted U-shaped part (204), and the other U-shaped part is wrapped around the outer end of the inverted U-shaped part (204) away from the horizontal part (203). Its fixing method includes the following steps: Step 1: Fix multiple sliding brackets (2) to the building base (4) at the designed distance using self-tapping screws (3); Step 2: The snap-fit ​​parts (6) of multiple roof panels (1) are snapped into the longitudinal grooves of the corresponding sliding brackets (2), and the raised parts (5) of adjacent roof panels (1) are covered on the outside of the snap-fit ​​parts (6) of adjacent roof panels (1). Step 3: The joint of adjacent roof panels (1) is hot-melted by a hot air welding machine to form a welded part (103) at the joint of adjacent roof panels (1).

2. A method of concealed mechanical fastening of roof panel formations according to claim 1 wherein, The sliding bracket (2) is slidably connected to the sliding bolt (7) in the longitudinal direction. The sliding bolt (7) is threadedly connected to the snap-fit ​​part (6). The sliding bracket (2) has a waist hole (202) for the sliding bolt (7) to slide.

3. A method of concealed mechanical fastening of roof panel formations according to claim 2 wherein, The raised portion (5) has a trapezoidal or semi-circular cross section, and the snap-fit ​​portion (6) also includes a support portion (602) integrally formed with the bending portion (601), and the support portion (602) is disposed opposite to the inner wall of the raised portion (5).

4. A method of concealed mechanical fastening of roof panel formations according to claim 3 wherein, The waist hole (202) is opened on the side wall of the inverted U-shaped part (204). The bent part (601) is provided with a threaded hole (603) that mates with the sliding bolt (7). The sliding bolt (7) has a multi-stage frustum structure, which includes an integrally formed threaded part (701), a sliding part (702) and a limiting part (703). The threaded part (701) is threadedly connected to the threaded hole (603), the sliding part (702) is slidably nested in the waist hole (202), and the limiting part (703) slidably abuts against the outer wall of the inverted U-shaped part (204).

5. A method of concealed mechanical fastening of roof panel formations according to claim 4 wherein, A pair of rubber sleeves (8) are engaged in the waist hole (202). Both rubber sleeves (8) abut against both sides of the sliding part (702). An arc groove (801) that cooperates with the sliding part (702) is opened on the opposite side of the pair of rubber sleeves (8). A through hole (802) is opened in the rubber sleeve (8) that passes through itself.

6. A method of concealed mechanical fastening of roof panel formations according to claim 1 wherein, The metal substrate (101) is made of aluminum-zinc coated steel plate, and the thermoplastic plate (102) is made of thermoplastic polyolefin elastomer or polyvinyl chloride. The metal substrate (101) has a thickness of 0.7 mm, and the thermoplastic plate (102) has a thickness of 2.0 mm. The metal substrate (101) and the thermoplastic plate (102) are both made into roof panel (1) by hot pressing. The sliding bracket (2) is made of aluminum alloy material and its surface is coated with polyurethane wear-resistant coating.

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