Metal lapping fixing member and lapping structure
By using a four-point anchoring design for metal lap fasteners and lap structures, and a multi-level sealing system, the problems of material loss and waterproofing hazards in large industrial building metal roofing systems have been solved. This has enabled zero-loss, precise tile splicing and efficient sealing, while improving tensile strength and waterproofing performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN HUASHEN STEEL STRUCTURE CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-23
AI Technical Summary
In metal roofing systems for large industrial buildings and public facilities, traditional manufacturing processes present a contradiction between material waste and joint reliability, and the waterproofing risks under conditions without a base plate are difficult to solve, especially the risk of leakage is high during high-altitude tile pressing operations.
It adopts metal lap fasteners and lap structure, and through the four-point anchoring design of screw and nut, combined with a multi-level sealing system, it ensures that the joint is located at the purlin bearing point and achieves dynamic sealing, including a multi-level sealing design of polyurethane sealant layer and butyl tape layer.
It achieves precise tile splicing with zero material loss, improves tensile strength and waterproof performance, eliminates the risk of intermittent seams and capillary seepage at the joints, and ensures the structural stability and sealing of the roofing system.
Smart Images
Figure CN224395913U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field, and in particular to a metal lap fastener and lap structure. Background Technology
[0002] In metal roofing systems for large industrial buildings and public facilities, 360° standing seam profiled steel sheets are widely used due to their excellent waterproofing and structural strength. These roofs typically employ ultra-long single-slope designs (single-slope lengths exceeding 36 meters), and traditional manufacturing processes face two major challenges:
[0003] 1. The contradiction between material loss and joint reliability:
[0004] Profiled sheets require continuous processing using multiple steel coils. To reduce material waste, the conventional practice is to directly connect the remaining steel coil tail material to the next steel coil for sheet forming (continuous coil-to-coil processing). However, when faced with the elimination of the roof floor and the requirement that all roof panel joints must be precisely fixed to the purlin positions to ensure structural load-bearing capacity, the direct coil-to-coil connection method cannot control the joint placement, leading to uncontrolled structural weak points.
[0005] 2. Waterproofing risks under conditions without a base plate:
[0006] The missing roof slab leaves the outer panel joints directly exposed to wind and rain. Conventional overlapping methods (such as flat joints or simple overlaps) are prone to sealing failure due to wind pressure and vibration. Especially in high-altitude tile laying operations, the precision of on-site processing joints is even more difficult to guarantee. Existing technologies lack purlin positioning and tile laying solutions for high-altitude environments, significantly increasing the risk of leakage. Utility Model Content
[0007] To address the aforementioned issues, this utility model provides a metal overlapping fastener and overlapping structure, achieving precise tile connection with zero material loss while ensuring the joint is located at the purlin bearing point and meeting dynamic sealing requirements.
[0008] This utility model provides a metal overlapping fastener, the specific technical solution of which is as follows:
[0009] Including roof panel molding strips and lap back panels;
[0010] The overlapping back panel and the roof panel strip are respectively adapted to the standing seam lock edge panel structure to be overlapped;
[0011] The overlapping back plate is provided with several screws, and the roof panel strip is provided with a first screw hole adapted to the screws. The first screw hole on the roof panel strip is connected to the screws on the overlapping back plate. The roof panel strip and the overlapping back plate are fixed to both sides of the two overlapping vertical seam lock plates by nuts.
[0012] Furthermore, the outer side of the screw is coated with a polyurethane sealant layer.
[0013] Furthermore, the nut is an M6 stainless steel anti-lock nut.
[0014] This utility model also provides an overlapping structure, including a first vertical seam locking plate, a second vertical seam locking plate, and the overlapping fasteners described above;
[0015] The tail of the first upright seam overlock plate overlaps the head of the second upright seam overlock plate. The first and second upright seam overlock plates are provided with second screw holes adapted to the screw rod. The first and second upright seam overlock plates are overlocked and fixed by the overlock fastener.
[0016] The axial direction of the overlapping fastener is perpendicular to the drainage direction of the first upright seam lock plate and the second upright seam lock plate.
[0017] Furthermore, a polyurethane sealant layer is applied to the edge of the second screw hole.
[0018] Furthermore, the second vertical seam locking plate is provided with two layers of butyl tape, which are respectively provided on both sides of the straight line where each of the second screw holes is located.
[0019] The beneficial effects of this utility model are as follows:
[0020] 1. The overlapping structure of this utility model forms a four-point anchoring structure by passing through the double plates and overlapping back plate with screws, which converts the wind suction force of the roof into the tightening force of the nuts, avoiding tearing at the overlapping joint of the locking plate. Compared with the traditional single-point locking connection, it improves the tensile strength. The axial direction of the overlapping fastener is designed to be perpendicular to the drainage direction, which blocks the lateral displacement caused by water flow impact, and at the same time eliminates the intermittent gaps at the plate overlapping joint caused by the longitudinal expansion and contraction stress of the roof panel.
[0021] 2. The structure of this utility model is designed with a multi-level three-dimensional sealing system. The screw is provided with a polyurethane sealing layer as the first level of sealing, which fills the thread gap. The butyl tape layer on the plate edge is provided as the second level of sealing, which isolates capillary water seepage. The butyl tape layer is distributed on both sides of the screw hole axis to form a double drainage dam structure, which effectively blocks the rise of condensate water uphill. The polyurethane sealing layer set at the edge of the screw hole is provided as the third level of sealing, which blocks the seepage path caused by the perforation. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overlapping overall structure of this utility model.
[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the overlap of this utility model.
[0024] Explanation of reference numerals in the attached drawings: 1-Roof panel molding strip, 2-Overlap back panel, 3-First vertical joint seam locking plate, 4-Second vertical joint seam locking plate, 5-Threaded rod, 6-First threaded hole, 7-Second threaded hole, 8-Nut, 9-Butyl tape layer. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. The components of the embodiments of the present utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0026] In the description of the embodiments of this utility model, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship commonly used when the utility model product is in use. These are only for the convenience of describing the utility model and simplifying the description, and are not intended to 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 utility model. Furthermore, the terms "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] Example 1
[0029] Embodiment 1 of this utility model discloses a metal lap fastener, such as... Figure 1 As shown, the specific structure is as follows:
[0030] Includes roof panel molding strip 1 and overlapping back panel 2;
[0031] The overlapping back panel 2 and the roof panel strip 1 are respectively adapted to the standing seam lock edge panel structure to be overlapped;
[0032] The overlapping back plate 2 is provided with a plurality of screws 5, and the roof panel strip 1 is provided with a first screw hole 6 adapted to the screws 5. The first screw hole 6 on the roof panel strip 1 is connected to the screws 5 on the overlapping back plate 2. The roof panel strip 1 and the overlapping back plate 2 are fixed to both sides of the two overlapping vertical seam lock plates by nuts 8.
[0033] In a preferred embodiment, the outer side of the screw 5 is coated with a polyurethane sealant layer.
[0034] In a preferred embodiment, the nut 8 is an M6 stainless steel anti-lock nut 8.
[0035] Example 2
[0036] Embodiment 2 of this utility model discloses an overlapping structure, such as Figure 1 and Figure 2 As shown, the specific structure is as follows:
[0037] Includes the first vertical seam locking plate 3, the second vertical seam locking plate 4, and the overlapping fastener described in Example 1;
[0038] The tail of the first vertical seam locking plate 3 overlaps above the head of the second vertical seam locking plate 4. The first vertical seam locking plate 3 and the second vertical seam locking plate 4 are provided with second screw holes 7 that are adapted to the screw rod 5. The first vertical seam locking plate 3 and the second vertical seam locking plate 4 are overlapped and fixed by the overlapping fastener.
[0039] The bottom of the overlapping back plate 2 of the overlapping fastener is provided with a fixing seat, which is fixed to the bottom purlin by self-tapping screws;
[0040] The axial direction of the overlapping fastener is perpendicular to the drainage direction of the first upright seam lock plate 3 and the second upright seam lock plate 4.
[0041] In a preferred embodiment, the edge of the second screw hole 7 is coated with a polyurethane sealant layer.
[0042] In a preferred embodiment, the second vertical seam locking plate 4 is provided with two butyl tape layers 9, which are respectively provided on both sides of the straight line where each of the second screw holes 7 is located.
[0043] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A metal lap fastener, characterized in that, Including roof panel molding strips and lap back panels; The overlapping back panel and the roof panel strip are respectively adapted to the standing seam lock edge panel structure to be overlapped; The overlapping back plate is provided with several screws, and the roof panel strip is provided with a first screw hole adapted to the screws. The first screw hole on the roof panel strip is connected to the screws on the overlapping back plate. The roof panel strip and the overlapping back plate are fixed to both sides of the two overlapping vertical seam lock plates by nuts.
2. The metal lap fastener according to claim 1, characterized in that, The outer side of the screw is coated with a polyurethane sealant layer.
3. The metal lap fastener according to claim 1, characterized in that, The nut is an M6 stainless steel anti-lock nut.
4. An overlapping structure, characterized in that, Includes a first vertical seam locking plate, a second vertical seam locking plate, and the overlapping fastener as described in any one of claims 1-3; The tail of the first upright seam overlock plate overlaps the head of the second upright seam overlock plate. The first and second upright seam overlock plates are provided with second screw holes adapted to the screw rod. The first and second upright seam overlock plates are overlocked and fixed by the overlock fastener. The axial direction of the overlapping fastener is perpendicular to the drainage direction of the first upright seam lock plate and the second upright seam lock plate.
5. The overlapping structure according to claim 4, characterized in that, The edge of the second screw hole is coated with a polyurethane sealant layer.
6. The overlapping structure according to claim 4, characterized in that, The second vertical seam locking plate is provided with two layers of butyl tape, which are respectively provided on both sides of the straight line where each of the second screw holes is located.