A concealed roof panel fixing system

Abstract

This invention relates to the field of building roofing and specifically discloses a concealed fixing system for roof panels. Through a snap-fit ​​part having a first U-shaped portion and a second U-shaped portion, and a sliding bracket having a third U-shaped portion and a fourth U-shaped portion that cooperates with the snap-fit ​​part, the panel body can be easily snapped into the sliding bracket. The snap-fit ​​part with double U-shaped portions and the sliding bracket provide better connection stability and greater thermal expansion deformation capacity for the panel body and the sliding bracket, overcoming the problem of stress concentration during thermal expansion and contraction of the panel body. By providing a sliding column that penetrates the sliding bracket and abuts against an elastic pin, the panel body can move longitudinally relative to the sliding bracket, improving the deformation capacity of the panel body during thermal expansion. Simultaneously, the sliding column and the elastic pin cooperate to achieve series-connected limiting of the locking strip, the sliding bracket, and the panel body, facilitating installation while improving connection stability.

Description

Technical Field

[0001] This invention relates to the field of building roofing, and more specifically, to a concealed fixing system for roof panels. Background Technology

[0002] Traditional roof panels are fixed with self-tapping screws. Although self-tapping screws can provide direct mechanical gripping force and wind uplift resistance, their rigid connection characteristics will produce significant defects when the roof panels are subjected to thermal expansion and contraction. When metal or composite roofs expand or contract linearly due to temperature differences, stress concentration areas will form around the screw holes. Under long-term action, this can easily lead to cracking of the panel paint layer, fatigue fracture of the substrate, or loosening of the screw connections.

[0003] A fixing system using elastic structures or sliding mechanisms is needed to overcome the stress concentration problem caused by thermal expansion and effectively alleviate the material deformation problem caused by temperature changes. At the same time, it is necessary to solve the problem of decreased connection stability of roof panels due to elastic and sliding connections, and improve the connection stability and wind resistance of roof panels. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this invention is to provide a concealed fixing system for roof panels that enables sliding and elastic connection between the panel body and the sliding bracket.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A concealed roof panel fixing system includes a panel body. One end of the panel body has a snap-fit ​​part, which snaps onto a sliding bracket. The sliding bracket is fixedly connected to the building base by self-tapping screws. The sliding bracket has a third U-shaped part with an opening facing downward and a fourth U-shaped part adjacent to the third U-shaped part with an opening facing upward. The snap-fit ​​part has a first U-shaped part nested inside the third U-shaped part and a second U-shaped part adjacent to the first U-shaped part and covering the outer wall of the fourth U-shaped part. A locking strip is snapped onto the outer side of the third U-shaped part. Vertically equidistant locking grooves are formed on the inner wall of the locking strip. Locking teeth nested in the locking grooves are fixedly connected to the outer wall of the third U-shaped part.

[0009] As a further improvement of the present invention, a first arc-shaped portion is provided on the vertical sidewall of the first U-shaped portion away from the second U-shaped portion, and the first arc-shaped portion extends inward to the first U-shaped portion.

[0010] As a further improvement of the present invention, the panel body is provided with a second arc-shaped portion on the side near the snap-fit ​​portion, the upper end of the second arc-shaped portion extends into the first U-shaped portion, and is close to the side of the second U-shaped portion.

[0011] As a further improvement of the present invention, the card strip is engaged with the top wall of the third U-shaped part by an elastic locking pin, and the top wall of the third U-shaped part is provided with an intermediate hole for the elastic locking pin to be inserted.

[0012] As a further improvement of the present invention, a sliding column is slidably connected in the middle hole, the upper end of the sliding column abuts against the elastic locking pin, and a longitudinal groove is provided on the top wall of the first U-shaped part for the sliding column to slide longitudinally.

[0013] As a further improvement of the present invention, the card strip is a long strip with a U-shaped cross-section, the card groove is a groove that runs through the card strip, and both the card tooth and the card groove have triangular or isosceles trapezoidal cross-sections.

[0014] As a further improvement of the present invention, the sliding bracket also includes a horizontal portion integrally formed with the third U-shaped portion, and a rib plate is fixedly connected to the horizontal portion, with the left end of the rib plate fixedly connected to the side wall of the third U-shaped portion.

[0015] As a further improvement of the present invention, the inner wall of the card strip is provided with an installation hole for accommodating the elastic locking pin. The elastic locking pin includes a fixed post fixedly connected to the inner wall of the installation hole, a sliding cylinder slidably connected to the fixed post, a helical spring provided between the sliding cylinder and the inner wall of the installation hole, and the sliding cylinder being inserted and fixedly connected to the intermediate hole.

[0016] As a further improvement of the present invention, the central hole penetrates through the third U-shaped part, and both the central hole and the sliding column have an I-shaped cross section.

[0017] 3. Beneficial Effects

[0018] Compared with the prior art, the advantages of this invention are:

[0019] (1) The present invention uses a snap-fit ​​part having a first U-shaped part and a second U-shaped part, and a sliding bracket having a third U-shaped part and a fourth U-shaped part that cooperates with the snap-fit ​​part, so that the panel body can be easily snapped with the sliding bracket. Furthermore, when the panel body deforms due to thermal expansion and contraction, the snap-fit ​​part with the double U-shaped part and the sliding bracket enable the panel body and the sliding bracket to have better connection stability and greater thermal expansion deformation capacity, thereby achieving better wind pressure resistance and overcoming the problem of stress concentration when the panel body is thermally expanded and contracted.

[0020] (2) The present invention uses a locking strip set on the outside of the third U-shaped part to constrain and limit the third U-shaped part that wraps the first U-shaped part, thereby further improving the connection stability between the panel body and the sliding bracket.

[0021] (3) The present invention enables the rapid installation and limiting of the card strip and sliding bracket by providing elastic pins fixed on the card strip, thereby improving the connection stability of the card strip and the sliding bracket and improving the overall structural stability of the fixing system.

[0022] (4) The present invention provides a sliding column that penetrates the sliding bracket and abuts against the elastic pin, so that the panel body can move longitudinally relative to the sliding bracket, thereby improving the deformation capacity of the panel body when it is thermally expanded. At the same time, the sliding column and the elastic pin work together to realize the series connection and limiting of the clip, the sliding bracket and the panel body, which facilitates installation and improves the stability of the connection. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the transverse cross-sectional structure of the present invention;

[0025] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0026] Figure 4 for Figure 3 Enlarged structural diagram of the position of the flexible locking pin;

[0027] Figure 5 This is an exploded assembly diagram of the panel body and the sliding bracket in this invention;

[0028] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0029] Figure 7 for Figure 5 Enlarged structural diagram at point C;

[0030] Figure 8 This is a schematic diagram of the deformation and stress of the snap-fit ​​part during thermal expansion in this invention;

[0031] Figure 9 This is a schematic diagram showing the movement of the elastic locking pin and sliding column during installation in this invention.

[0032] The following are the labeling instructions in the diagram: 1. Panel body; 101. Snap-fit ​​part; 102. Raised part; 103. First U-shaped part; 104. Second U-shaped part; 105. First arc-shaped part; 106. Second arc-shaped part; 107. Longitudinal groove; 2. Sliding bracket; 201. Third U-shaped part; 202. Fourth U-shaped part; 203. Clip; 204. Center hole; 3. Self-tapping screw; 4. Clip strip; 401. Clip groove; 402. Mounting hole; 5. Building base; 6. Rib plate; 7. Elastic pin; 701. Fixed post; 702. Sliding cylinder; 703. Helical spring; 8. Sliding post. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Please see Figures 1-8 In the first embodiment of the present invention, a roof panel concealed fixing system includes a panel body 1. One end of the panel body 1 is provided with a snap-fit ​​part 101, which snaps onto a sliding bracket 2. The sliding bracket 2 is fixedly connected to the building base 5 by self-tapping screws 3. The sliding bracket 2 is provided with a third U-shaped part 201 with its opening facing downward and a fourth U-shaped part 202 adjacent to the third U-shaped part 201 with its opening facing upward. The snap-fit ​​part 101 is provided with a first U-shaped part 103 nested in the third U-shaped part 201 and a second U-shaped part 104 adjacent to the first U-shaped part 103 and covering the outer wall of the fourth U-shaped part 202. A locking strip 4 is snapped onto the outer side of the third U-shaped part 201. The inner wall of the locking strip 4 is provided with vertically equidistantly distributed locking grooves 401. Locking teeth 203 nested in the locking grooves 401 are fixedly connected to the outer wall of the third U-shaped part 201.

[0037] Compared to traditional roof panel fixing devices, this invention, through a snap-fit ​​part 101 having a first U-shaped portion 103 and a second U-shaped portion 104, and a sliding bracket 2 having a third U-shaped portion 201 and a fourth U-shaped portion 202 that cooperates with the snap-fit ​​part 101, makes it easy for the panel body 1 to snap onto the sliding bracket 2. Furthermore, when the panel body 1 deforms due to thermal expansion and contraction, the snap-fit ​​part 101 with double U-shaped portions and the sliding bracket 2 provide better connection stability and greater thermal expansion deformation capacity, achieving better wind pressure resistance and reducing the probability of stress concentration when the panel body 1 undergoes thermal expansion and contraction. At the same time, the locking strip 4 provided on the outside of the third U-shaped portion 201 constrains and limits the third U-shaped portion 201 that wraps around the first U-shaped portion 103, further improving the connection stability between the panel body 1 and the sliding bracket 2.

[0038] It should be noted that a raised portion 102 is provided at the end of the panel body 1 away from the snap-fit ​​portion 101. When installing multiple panel bodies 1, the raised portion 102 covers the outside of the snap-fit ​​portion 101 to prevent rainwater from contacting the sliding bracket 2 and the self-tapping screw 3. In addition, the panel body 1 includes an integrally thermoformed substrate and a thermoplastic plate. One end of the panel body 1 is fixed by the sliding bracket 2, and the other end is fixed to the adjacent panel body 1 by a hot-melt fixing method.

[0039] Please see Figure 3 and Figure 6 A first arc-shaped portion 105 is provided on the vertical side wall of the first U-shaped portion 103 away from the second U-shaped portion 104, and the first arc-shaped portion 105 extends inward to the first U-shaped portion 103.

[0040] Specifically, by providing a first arc-shaped portion 105, when the snap-fit ​​portion 101 is subjected to force, the first U-shaped portion 103 has a larger elastic deformation, reducing the probability that the snap-fit ​​portion 101 will come out of the third U-shaped portion 201 due to deformation, further improving the stability of the connection, thereby improving the overall wind pressure resistance of the roof panel.

[0041] Please see Figure 3 and Figure 6 The panel body 1 has a second arc-shaped portion 106 on the side near the snap-fit ​​portion 101. The upper end of the second arc-shaped portion 106 extends into the first U-shaped portion 103 and is close to the side of the second U-shaped portion 104.

[0042] Specifically, when the locking part 101 is deformed under force, the first arc-shaped part 105 and the second arc-shaped part 106 deform and abut against the inner wall of the first U-shaped part 103, preventing the locking part 101 from continuing to deform and further reducing the probability of the locking part 101 coming out of the third U-shaped part 201.

[0043] Please see Figure 3 and Figure 7 The card strip 4 is a long strip with a U-shaped cross section, and the card groove 401 is a groove that passes through the card strip 4. Both the card tooth 203 and the card groove 401 have triangular or isosceles trapezoidal cross sections.

[0044] Specifically, the locking teeth 203 and the locking grooves 401, with a triangular or isosceles trapezoidal cross-section, enable the locking strip 4 and the sliding bracket 2 to have a good locking effect. It should be noted that the locking teeth 203 are available in various specifications, including Type I: tooth height 5mm (suitable for wind pressure ≤ 0.6kPa), Type II: tooth height 8mm (suitable for 0.6kPa < wind pressure ≤ 1.0kPa), and Type III: tooth height 12mm (suitable for wind pressure > 1.0kPa). Those skilled in the art can select the sliding bracket 2 and locking strip 4 with the corresponding tooth height based on the local environment, which has good adaptability.

[0045] Please see Figure 1 and Figure 3 The sliding bracket 2 also includes a horizontal part integrally formed with the third U-shaped part 201, and a rib plate 6 is fixedly connected to the horizontal part. The left end of the rib plate 6 is fixedly connected to the side wall of the third U-shaped part 201.

[0046] Specifically, by providing ribs 6, when the snap-fit ​​part 101 deforms, the ribs 6 provide support for the sliding bracket 2, thereby increasing the structural stability and wind resistance of the sliding bracket 2.

[0047] In the second embodiment of the present invention, please refer to Figure 3 , Figure 4 , Figure 7 and Figure 9 The card strip 4 is engaged with the top wall of the third U-shaped part 201 by the elastic locking pin 7. The top wall of the third U-shaped part 201 is provided with a middle hole 204 for the elastic locking pin 7 to be inserted.

[0048] Specifically, when installing the clip 4, the slot 401 of the clip 4 is aligned with the tooth 203 of the third U-shaped part 201, and then the clip 4 is pushed in longitudinally. When it is pushed to the installation position, the elastic locking pin 7 is inserted into the middle hole 204, which realizes the locking and fixing of the clip 4, and further improves the connection stability between the clip 4 and the sliding bracket 2.

[0049] Please see Figure 4 and Figure 7 The inner wall of the clip 4 is provided with a mounting hole 402 for accommodating the elastic clip 7. The elastic clip 7 includes a fixing post 701 fixedly connected to the inner wall of the mounting hole 402. The fixing post 701 is slidably connected to a sliding cylinder 702. A spiral spring 703 is provided between the sliding cylinder 702 and the inner wall of the mounting hole 402. The sliding cylinder 702 is inserted and fixedly connected to the intermediate hole 204.

[0050] Specifically, when the clip 4 slides on the sliding bracket 2, the sliding cylinder 702 compresses the helical spring 703, and the sliding cylinder 702 is completely housed in the mounting hole 402. When the mounting hole 402 and the intermediate hole 204 are opposite each other, the sliding cylinder 702 is inserted into the intermediate hole 204 under the action of the helical spring 703.

[0051] Please see Figure 4 and Figure 7 A sliding column 8 is slidably connected inside the middle hole 204, and a longitudinal groove 107 is provided on the top wall of the first U-shaped part 103 for the sliding column 8 to slide longitudinally.

[0052] Specifically, when the sliding cylinder 702 is inserted into the middle hole 204, it squeezes the sliding column 8, causing the sliding column 8 to be inserted into the longitudinal groove 107 of the first U-shaped part 103. When the panel body 1 is subjected to force or heat deformation, the sliding column 8 slides longitudinally in the longitudinal groove 107, so that the panel body 1 can be longitudinally displaced relative to the sliding bracket 2, thereby improving the longitudinal deformation capability of the panel body 1.

[0053] Please see Figure 4 and Figure 7 The central hole 204 penetrates the third U-shaped part 201, and both the central hole 204 and the sliding column 8 have an I-shaped cross section.

[0054] Specifically, the sliding column 8 can move up and down within the central hole 204, facilitating the snap-fit ​​installation of the first U-shaped part 103 and the third U-shaped part 201 and avoiding interference.

[0055] 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 concepts, should be covered within the scope of protection of the present invention.

Claims

1. A concealed fastening system for roof panels, characterized in that The panel body (1) includes a snap-fit ​​part (101) at one end, which snaps a sliding bracket (2) onto it. The sliding bracket (2) is fixedly connected to the building base (5) by self-tapping screws (3). The sliding bracket (2) has a third U-shaped part (201) with its opening facing downward and a fourth U-shaped part (202) adjacent to the third U-shaped part (201) with its opening facing upward. The snap-fit ​​part (101) is nested within the third U-shaped part. The first U-shaped part (103) inside the U-shaped part (201) and the second U-shaped part (104) adjacent to the first U-shaped part (103) and covering the outer wall of the fourth U-shaped part (202); the third U-shaped part (201) is fitted with a locking strip (4) on the outside, and the locking strip (4) has vertically equidistant locking grooves (401) on the inner wall of the locking strip (4), and the locking teeth (203) nested in the locking grooves (401) are fixedly connected to the outer wall of the third U-shaped part (201); A first arc-shaped portion (105) is provided on the vertical sidewall of the first U-shaped portion (103) away from the second U-shaped portion (104), and the first arc-shaped portion (105) extends inward to the first U-shaped portion (103); The panel body (1) has a second arc-shaped part (106) on the side near the snap-fit ​​part (101). The upper end of the second arc-shaped part (106) extends into the first U-shaped part (103) and is close to the side of the second U-shaped part (104). The card strip (4) is engaged with the top wall of the third U-shaped part (201) by an elastic pin (7), and the top wall of the third U-shaped part (201) is provided with an intermediate hole (204) for the elastic pin (7) to be inserted.

2. The concealed fixing system for roof panels according to claim 1, characterized in that, A sliding column (8) is slidably connected inside the intermediate hole (204). The upper end of the sliding column (8) abuts against the elastic locking pin (7). A longitudinal groove (107) is provided on the top wall of the first U-shaped part (103) for the sliding column (8) to slide longitudinally.

3. A concealed fastening system for roof panels according to claim 1, wherein The card strip (4) is a long strip with a U-shaped cross section, and the card groove (401) is a groove that passes through the card strip (4). Both the card tooth (203) and the card groove (401) have triangular or isosceles trapezoidal cross sections.

4. A concealed fastening system for roof panels according to claim 1, wherein The sliding bracket (2) also includes a horizontal part integrally formed with the third U-shaped part (201), and a rib plate (6) is fixedly connected to the horizontal part. The left end of the rib plate (6) is fixedly connected to the side wall of the third U-shaped part (201).

5. A concealed fastening system for roof panels as defined in claim 1, wherein The inner wall of the card strip (4) is provided with a mounting hole (402) for accommodating the elastic locking pin (7). The elastic locking pin (7) includes a fixing post (701) fixedly connected to the inner wall of the mounting hole (402). The fixing post (701) is slidably connected to a sliding cylinder (702). A spiral spring (703) is provided between the sliding cylinder (702) and the inner wall of the mounting hole (402). The sliding cylinder (702) is inserted and fixedly connected to the intermediate hole (204).

6. A concealed fastening system for roof panels according to claim 5, wherein The intermediate hole (204) penetrates the third U-shaped part (201), and both the intermediate hole (204) and the sliding column (8) have an I-shaped cross section.

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