Long-short slope joint device and metal roof

Abstract

The embodiment of the present application provides a long-short slope joint telescopic device and a metal roof, the metal roof comprises a roof keel and a roof panel system, the roof panel system is provided with the telescopic device at a long-short slope joint position. The telescopic device comprises a telescopic structure and a waterproof structure, the telescopic structure comprises a mounting piece and two sliding components, the mounting piece is mounted on the roof keel and has an upwardly extending mounting plate, the two sliding components are independently slidably arranged on the two sides of the mounting plate, the long slope roof panel and the short slope roof panel are respectively overlapped and fixed on the sliding component on the corresponding side, and the deformation difference of the two roof panels is released by the independent movement of the two sliding components on the two sides of the mounting plate. The waterproof structure comprises an elastic sealing piece and a cover plate, the elastic sealing piece is covered on the telescopic structure and is connected with the corresponding side roof panel on the two sides, the cover plate is covered on the elastic sealing piece and one side is a fixed side, and the other side is a free side, so that the relative movement of the two roof panels is allowed while the waterproof sealing property is ensured.

Description

Technical Field

[0001] This invention relates to the field of metal building technology, and more particularly to expansion joints between long and short slopes and metal roofs. Background Technology

[0002] Metal roofs consist of roof joists and roof panels laid on the roof joists. Because the roof joists are made of different materials than the roof panels, when the ambient temperature changes significantly, according to the principle of thermal expansion and contraction, the deformation of the roof joists and roof panels will not be the same, resulting in relative displacement between them.

[0003] Normally, the roof panels of a metal roof are of uniform length, and the deformation of the entire roof panel is synchronized. However, in some buildings, the metal roof has long slopes and short slopes. The roof panels required for the long slopes are longer than those required for the short slopes. When the lengths of the roof panels differ, since the deformation length due to thermal expansion and contraction is directly proportional to the total elongation of the panel, a deformation difference will occur between the roof panels of different lengths. This deformation difference can easily exert a tensile force on the roof, thereby causing damage to the roof system. Summary of the Invention

[0004] In view of the above problems, embodiments of the present invention are proposed. The purpose of the embodiments of the present invention is to provide an expansion joint device for long and short slopes that can be applied at the junction of long and short slopes, and where both the long slope roof panel and the short slope roof can move independently to absorb deformation differences and has good waterproof performance.

[0005] To achieve this objective, the embodiments of the present invention adopt the following technical solutions: An expansion joint between long and short slopes includes: A telescopic structure includes a mounting component installed on a roof joist and sliding components. The mounting component has an upwardly extending mounting plate, and a sliding component is respectively provided on both sides of the mounting plate. The sliding components are movable independently relative to the mounting component. The adjacent edges of the long-slope roof panel and the short-slope roof panel are respectively overlapped and fixed to the corresponding sliding components. A waterproof structure includes an elastic seal and a cover plate. The elastic seal is installed on the telescopic structure, with one side connected to the long-sloped roof panel and the other side connected to the short-sloped roof panel. The cover plate is installed on the elastic seal, with one side of the cover plate being a fixed side. The fixed side is fixed to the elastic seal and the roof panel on the corresponding side.

[0006] Optionally, the telescopic structure further includes: A connecting component passes sequentially through the sliding component located on one side of the mounting plate, the mounting plate, and the sliding component located on the other side of the mounting plate to restrict the position of the sliding component on the mounting plate; The sliding component has a first elongated hole, and the connecting component passes through the first elongated hole and slides along the first elongated hole.

[0007] Optionally, the sliding component includes: A sliding component includes a top plate, a sliding plate located on one side of the top plate, and a flange plate located on the other side of the top plate. The edge of the long-sloped roof panel or the short-sloped roof panel overlaps the top plate. The sliding plate has a first elongated hole. A spacer, the spacer comprising a first limiting plate and a second limiting plate connected at their bottom ends and arranged in parallel; The sliding plate is located between the first limiting plate and the second limiting plate; The distance between the first limiting plate and the second limiting plate is greater than the thickness of the sliding plate; The first limiting plate abuts against the mounting plate. The first limiting plate is provided with a circular hole, and the second limiting plate is provided with a second elongated hole that matches the first elongated hole and allows the connecting component to pass through.

[0008] Alternatively, the length of the spacer is less than the length of the sliding member; The top plate and the flange plate are separated at the spacer, forming a clearance opening.

[0009] Optionally, the mounting component is a one-piece inverted T-shaped structure; or The mounting component includes two angle steels that are attached to each other with their backs to each other. One side of the two angle steels is attached together and extends upward to form the mounting plate. The other side of the two angle steels extends to both sides and is fixed to the roof joists.

[0010] Optionally, the cover plate includes two side plates at an acute angle, with the upper side plates connected together and the lower side plates forming an overlapping edge that fits into the elastic seal.

[0011] Optionally, it also includes: The connector is used to fix the overlapping edge of the fixed side to the elastic seal and the roof panel on the corresponding side. The side of the elastic seal away from the fixed side is connected to the roof panel on the corresponding side through the connector.

[0012] Optionally, it also includes: A pressure strip is disposed on the side of the elastic seal opposite to the fixed side and located between the connector and the elastic seal, the pressure strip abutting against the limiting end of the connector. Optionally, it further includes: An adhesive seal is provided between the two sides of the elastic seal and the roof panel on the corresponding side.

[0013] Another objective of this invention is to provide a metal roof system that does not tear at the junction of long and short sections and has good waterproof performance.

[0014] To achieve this objective, the embodiments of the present invention adopt the following technical solutions: A metal roof, comprising: Roof joists; and The roof panel system is laid on the roof joists, and the roof panel system is connected to the roof joists at the junction of the long and short slopes using the aforementioned long and short slope junction expansion joint device.

[0015] The technical solution provided by this invention includes a telescopic device comprising a telescopic structure and a waterproof structure. The telescopic structure includes an installation component and a sliding assembly. The installation component is connected to the roof joists and has an upwardly extending installation plate. A sliding assembly is provided on each side of the installation plate, allowing the sliding assemblies to move independently relative to the installation component. The adjacent edges of the long-slope roof panel and the short-slope roof panel overlap and are fixed to the corresponding sliding assemblies. The deformation difference between the two roof panels is released by the independent movement of the two sliding assemblies on both sides of the installation plate. The waterproof structure includes an elastic seal and a cover plate. The elastic seal is placed over the adjacent edges of two adjacent roof panels, with both sides connected to the corresponding roof panels to seal the joint. The cover plate is fastened to the elastic seal, with one side being a fixed side, fixed to the elastic seal and the roof panel on that side, and the other side being a free side, allowing the roof panel on that side to move relative to the elastic seal. When relative displacement occurs between the long-slope roof panel and the short-slope roof panel, the elastic seal absorbs the displacement difference between the two roof panels through its own elastic deformation. The fixed side of the cover plate moves synchronously with one roof panel, while the free side allows the other roof panel to slide. The two roof panels deform independently without interfering with each other, avoiding the problem of waterproof failure caused by the rigid waterproof structure being torn under relative displacement. While releasing the deformation due to temperature difference, it maintains the waterproof sealing function at the junction of the roof panels. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of a roof panel system with long slopes and short slopes provided in an embodiment of the present invention; Figures 2a-2b for Figure 1 Exploded view of the cross-section at point AA; Figure 3 This is a schematic diagram of a telescopic structure provided in an embodiment of the present invention; Figure 4 for Figure 3 Exploded view; Figure 5 This is a schematic diagram of the structure of a sliding component provided in an embodiment of the present invention; Figure 6 for Figure 5 Exploded view; Figure 7 This is a schematic diagram of the longitudinal section of a spacer provided in an embodiment of the present invention.

[0018] In the picture: 10. Expansion joint structure at the junction of long and short slopes; 20. Roof panel; 201. Long slope roof panel; 202. Short slope roof panel; 30. Roof joists; 40. Waterproofing structure; 1. Sliding assembly; 11. Sliding component; 111. Top plate; 112. Sliding plate; 113. Flanged plate; 114. First elongated hole; 115. Clearance opening; 12. Spacer; 121. First limiting plate; 122. Second limiting plate; 123. Second elongated hole; 2. Installation components; 21. Angle steel; 22. Mounting plate; 3. Connecting components; 31. Bolts; 32. Nuts.

[0019] 41. Elastic seal; 42. Cover plate; 421. Side plate; 422. Overlap edge; 43. Connector; 44. Pressure strip; 45. Adhesive seal. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0024] This application provides a metal roof, which includes a roof joists 30 and a roof panel system laid on the roof joists 30. The roof joists 30 are the load-bearing framework of the metal roof, composed of purlins and supporting members, and bear the weight of the roof panels 20, wind loads, snow loads, and other external forces. The roof panel system includes multiple roof panels 20, which are sequentially laid on the roof joists 30 to form a continuous roof covering layer. Please refer to... Figure 1 As shown, in some buildings, a metal roof has a long slope and a short slope on one side. The long slope section is longer along the slope direction, while the short slope section is shorter, and the two meet at the junction. Since the length of thermal expansion and contraction deformation is directly proportional to the total elongation of the panels, the length of the long slope roof panel 201 used for the long slope is greater than the length of the short slope roof panel 202 used for the short slope. When the ambient temperature changes, the cumulative deformation of the long slope roof panel 201 is greater than that of the short slope roof panel 202, resulting in a deformation difference at the junction. If this deformation difference is rigidly constrained, it will exert a tensile force on the roof, causing the roof panel 20 to crack or the connection joint to fail. In addition, the junction of the long and short slopes also needs to meet waterproofing and sealing requirements. Due to the deformation difference between the long slope roof panel 201 and the short slope roof panel 202, a rigid waterproofing structure cannot accommodate the deformation difference, making the waterproofing structure prone to tearing and affecting its waterproofing performance.

[0025] Based on this, please combine Figure 1 refer to Figures 2a-2bAs shown in the embodiment of this application, a long-short slope junction expansion joint device is provided. This expansion joint device includes an expansion structure and a waterproof structure 40. The adjacent edges of the long slope roof panel 201 and the adjacent short slope roof panel 202 are installed on the roof joists 30 via the expansion structure, allowing the deformation of the long slope roof panel 201 and the short slope roof panel 202 to occur independently, thus releasing the deformation difference between them. The roof panel system is not affected by the deformation difference between the two adjacent roof panels 20 at the long-short slope junction. The waterproof structure 40 covers the expansion structure, not only not restricting the relative displacement of the two roof panels 20, but also ensuring good waterproof performance.

[0026] Specifically, please combine Figure 1 refer to Figures 2a to 4 As shown, in some embodiments of this application, the telescopic structure includes a mounting member 2 and a sliding assembly 1. The mounting member 2 is connected to the roof joists 30 and is a long strip extending perpendicular to the joist purlins, fixed to the upper surface of the roof joists 30 by screws or bolts 31. The mounting member 2 has an upwardly extending mounting plate 22, which is erected perpendicular to the roof panel 20 and perpendicular to the base plate of the mounting member 2. The mounting plate 22 provides an installation reference and sliding direction for the sliding assembly 1. A sliding assembly 1 is provided on each side of the mounting plate 22, that is, a sliding assembly 1 is provided on the side of the mounting plate 22 facing the long slope, and a sliding assembly 1 is also provided on the side of the mounting plate 22 facing the short slope. The two sliding assemblies 1 are symmetrically arranged with the mounting plate 22 as the center. The sliding assemblies 1 can move independently relative to the mounting member 2. The two sliding assemblies 1 do not move together when sliding, and the movement of one sliding assembly 1 will not drive the movement of the other sliding assembly 1. The end edge of the long-sloping roof panel 201 near the junction rests on the sliding component 1 on one side of the mounting plate 22 and is fixed with fasteners. The end edge of the short-sloping roof panel 202 near the junction rests on the sliding component 1 on the other side of the mounting plate 22 and is also fixed with fasteners. This allows the two adjacent roof panels 20 at the junction of the long and short slopes to move independently when they deform, without affecting each other.

[0027] Please refer to Figures 2a-2bAs shown, the waterproof structure 40 includes an elastic seal 41 and a cover plate 42. The elastic seal 41 is installed on the expansion joint, connected to the long pitched roof panel 201 on one side and the short pitched roof panel 202 on the other side, to completely cover and seal the expansion joint, preventing rainwater from seeping in through gaps. The cover plate 42 covers the elastic seal 41 and is fastened to it, pressing the elastic seal 41 firmly against the surface of the long pitched roof panel 201 or the short pitched roof panel 202, while providing external protection for the elastic seal 41, preventing it from being directly exposed to sunlight and ultraviolet radiation and rainwater erosion, which would accelerate its aging. One side of the cover plate 42 is a fixed side, which is fixed to the elastic seal 41 and the corresponding roof panel 20, while the other side is a free side, which is only fastened to the elastic seal 41 and is not fixed to the elastic seal 41 or the roof panel 20. In this embodiment, the fixed side of the cover plate 42 is fixed to the long-slope roof panel 201. In other implementations, it can also be fixed to the short-slope roof panel 20, as long as one side of the cover plate 42 is fixed and the other side is free. This application does not make any specific limitations.

[0028] When the ambient temperature rises, the longer pitched roof panel 201, due to its greater length, elongates more than the shorter pitched roof panel 202. During elongation, the longer pitched roof panel 201 not only pushes its connected sliding assembly 1 along the mounting plate 22 away from the junction, but also causes the corresponding area of ​​the elastic seal 41 above it and the fixed side of the cover plate 42 to move synchronously. The cover plate 42 moves in the same direction as the fixed side, while its free side slides on the surface of the elastic seal 41, without restricting the relative movement between the roof panel 20 and the elastic seal 41 on that side. The shorter pitched roof panel 202 elongates less; its connected sliding assembly 1 and the corresponding side of the elastic seal 41 slide along the mounting plate 22 in the same or opposite directions, with the sliding amount matching the elongation of the shorter pitched roof panel 202. The sliding directions and sliding amounts of the two sliding components 1 on the mounting plate 22 are independent, resulting in a relative misalignment between the two sliding components 1. This misalignment is exactly equal to the deformation difference between the long-slope roof panel 201 and the short-slope roof panel 202, and the deformation difference is released through the misaligned movement of the two sliding components 1. The two sides of the elastic seal 41 deform with the corresponding roof panel 20, absorbing the displacement difference through their own elastic deformation. The free side of the cover plate 42 does not bind the displacement of the short-slope roof panel 202 to the cover plate 42 and the long-slope roof panel 201. The two roof surfaces deform independently, and the direction and magnitude of the displacement do not interfere with each other.

[0029] Similarly, when the ambient temperature decreases, the long-slope roof panel 201 and the short-slope roof panel 202 each contract, and their respective connected sliding components 1 slide back to their original positions by different amounts in opposite or the same direction. The two sides of the elastic seal 41 move with the corresponding roof panel 20, and the cover plate 42 moves with the fixed side of the long-slope roof panel 201. The contraction displacement is absorbed by the independent movement of the sliding components 1 and the elastic force of the elastic seal 41 itself. Throughout the temperature change process, the long-slope roof panel 201 and the short-slope roof panel 202 never generate mutual tensile stress because the deformation difference between them is not forcibly constrained by any rigid connection, but rather the displacement is released through the independent sliding of the two sliding components 1 on the mounting plate 22 and the deformation of the elastic seal 41 itself. This not only meets the connection requirements between the long-slope roof panel 201 and the short-slope roof panel 202 at the junction of the long and short slopes, but also meets the waterproofing requirements.

[0030] Normally, adjacent roof panels 20 have a male rib structure on one side and a female rib structure on the other. The male and female rib structures are wrapped together and bent to form a locking edge, thus connecting the two adjacent roof panels. However, for adjacent edges of adjacent roof panels 20 at the junction of long and short slopes, a locking edge connection is not possible when using the aforementioned expansion joint structure. To avoid interference from the male or female rib structures on adjacent edges, the female or male rib structures on adjacent edges of adjacent roof panels 20 at the junction of long and short slopes need to be cut off to ensure smooth installation with the mounting plate 22.

[0031] To ensure that the sliding path of the sliding assembly 1 on the mounting plate 22 is controlled, and to limit the detachment of the sliding assembly 1 in the direction perpendicular to the mounting plate 22, please refer to... Figures 2a-2b ,refer to Figures 3-6As shown, in some embodiments of this application, the long-short slope junction telescopic structure 10 further includes a connecting component 3. The connecting component 3 passes sequentially through the sliding component 1 located on one side of the mounting plate 22, the mounting plate 22, and the sliding component 1 located on the other side of the mounting plate 22, connecting the two sliding components 1 and the mounting plate 22 together. The connecting component 3 can be a combination of bolts 31 and nuts 32. The shank of the bolt 31 passes sequentially through one sliding component 1, the mounting plate 22, and the other sliding component 1, and the end is screwed with the nut 32 to lock it. The sliding component 1 is provided with a first elongated hole 114, and the connecting component 3 passes through the first elongated hole 114 and can slide along the first elongated hole 114. The connecting component 3 constrains the position of the two sliding components 1 in the direction perpendicular to the mounting plate 22, preventing the sliding components 1 from coming off the mounting plate 22, but does not restrict the sliding of the sliding components 1 along the length direction of the mounting plate 22. The first elongated hole 114 extends along the length of the mounting plate 22, and its length direction is consistent with the deformation direction of the roof panel 20. The rod of the connecting component 3 passes through the first elongated hole 114. The diameter of the first elongated hole 114 is slightly larger than the outer diameter of the rod of the connecting component 3, the width of the hole matches the diameter of the rod, and the length of the hole provides the sliding stroke for the sliding component 1. When the connecting component 3 is fixed relative to the mounting plate 22, the rod of the connecting component 3 passes through the circular hole opened on the mounting plate 22. The circular hole and the rod are in a tight fit or a small clearance fit, so that the position of the mounting plate 22 on the connecting component 3 remains unchanged. The sliding component 1 slides around the rod of the connecting component 3 along the length of the mounting plate 22 through the first elongated hole 114. The sliding stroke is determined by the remaining length after subtracting the diameter of the rod from the length of the first elongated hole 114. When the roof panel 20 moves the sliding assembly 1, the first elongated hole 114 on the sliding assembly 1 slides relative to the connecting assembly 3 rod. The connecting assembly 3 does not move with the sliding assembly 1, and the limiting end of the connecting assembly 3 always presses the sliding assembly 1 against the side of the mounting plate 22, so that the sliding assembly 1 will not come off during the sliding process. In the embodiment of this application, the width of the first elongated hole 114 is 10mm and the length is 50mm to provide sufficient sliding stroke to cover the maximum deformation of the roof panel 20 under extreme temperature differences. Of course, in practical applications, the size of the first elongated hole 114 can also be other, as long as it meets the actual needs, and this application does not make specific limitations.

[0032] To ensure that the edges of the roof panel 20 slide smoothly during deformation and do not become skewed, please refer to... Figures 3-6As shown, in some embodiments of this application, multiple sliding components 1 can be spaced apart along the length of the mounting plate 22 on the same side of the mounting plate 22, with a gap between adjacent sliding components 1. The multiple sliding components 1 are arranged along the length of the roof panel 20, with each sliding component 1 bearing the deformation force and self-weight load transmitted by the roof panel 20 in that area. The gap between adjacent sliding components 1 forms a natural segmented deformation release zone. When there are local temperature differences or installation deviations in the roof panel 20, each sliding component 1 can be independently fine-tuned to avoid long-distance cumulative errors caused by the rigid synchronous movement of all sliding components 1. The spacing is set according to the cross-sectional wave pitch and purlin spacing of the roof panel 20 to ensure that each sliding component 1 is supported by a purlin. The spacing in this embodiment is 10mm, but in practical applications, the spacing value can be other values, as long as the requirements are met; this application does not impose specific limitations.

[0033] Please refer to some implementations of this application. Figures 5-6 As shown, one possible structure of the sliding assembly 1 is as follows: the sliding assembly 1 includes a sliding member 11, which is formed by bending a metal sheet, resulting in low cost. The sliding member 11 includes a top plate 111, a sliding plate 112 located on one side of the top plate 111, and a flange plate 113 located on the other side of the top plate 111, such that the cross-section of the sliding member 11 is an inverted U-shape or a downward-opening groove shape. The top plate 111 is a plate-like structure parallel to the roof panel 20, and its upper surface is used to support the edge of the roof panel 20. The edge of the roof panel 20 overlaps the top plate 111 and is fixedly connected to the top plate 111 by fasteners or adhesive structures. The sliding plate 112 is formed by bending the edge of the top plate 111 near the mounting plate 22 downward, and is perpendicular or approximately perpendicular to the top plate 111. The sliding plate 112 has a first elongated hole 114 extending along the length direction of the sliding plate 112. The flange 113 is formed by bending the top plate 111 downward from the other side of the mounting plate 22, and forms an obtuse angle with the top plate 111. The angle between the flange 113 and the top plate 111 matches the overlapping edge of the roof panel 20. The flange 113 also provides support and limit for the edge of the roof panel 20.

[0034] To avoid friction affecting slippage, please refer to some embodiments of this application. Figures 5-7As shown, the sliding assembly 1 also includes a spacer 12. The spacer 12 includes a first limiting plate 121 and a second limiting plate 122 connected at their bottom ends and arranged in parallel. The bottom ends of the first limiting plate 121 and the second limiting plate 122 are connected by a horizontal base plate or an arc-shaped plate. There is a gap between the first limiting plate 121 and the second limiting plate 122, so that the spacer 12 forms a receiving groove for accommodating the sliding plate 112. The sliding plate 112 is located between the first limiting plate 121 and the second limiting plate 122. The distance between the first limiting plate 121 and the second limiting plate 122 is greater than the thickness of the sliding plate 112. That is, the width of the receiving groove is slightly greater than the thickness of the sliding plate 112. A small gap is left between the sliding plate 112 and the two limiting plates to ensure that the sliding plate 112 will not be clamped or stuck by the two limiting plates when it slides along the length direction in the receiving groove. The two limiting plates can also constrain the swing amplitude of the sliding plate 112 in the direction perpendicular to the mounting plate 22, so that the sliding plate 112 always maintains the sliding posture and does not change its posture. The first limiting plate 121 abuts against the mounting plate 22, that is, the surface of the first limiting plate 121 is in contact with the side of the mounting plate 22, and the mounting plate 22 provides lateral support for the first limiting plate 121. Both the first limiting plate 121 and the second limiting plate 122 have through holes that match the first elongated hole 114, allowing the connecting assembly 3 to pass through. The rod of the connecting assembly 3 passes sequentially through the through hole of the second limiting plate 122, the first elongated hole 114, the through hole of the first limiting plate 121, and the mounting plate 22, connecting the spacer 12 and the sliding member 11 together on the mounting plate 22. The spacer 12 is pressed against the mounting plate 22 by the connecting assembly 3, making the spacer 12 fixed relative to the mounting plate 22, thus providing a fixed and stable slide for the sliding member 11 to guide and limit the sliding of the sliding member 11.

[0035] In order to ensure the spacer 12 is fixed on the mounting plate 22 and to prevent the through hole from affecting the sliding stroke of the sliding member 11, in some embodiments of this application, please refer to... Figure 6As shown, the through hole on the first limiting plate 121 is a circular hole, ensuring no relative displacement between the spacer 12 and the mounting plate 22. The through hole on the second limiting plate 122 is a second elongated oval hole 123, the length direction of which is consistent with the length direction of the first elongated oval hole 114, both extending along the length direction of the sliding plate 112. This allows the connecting assembly 3 to have a certain positional adjustment margin on the second limiting plate 122. During assembly, the connecting assembly 3 can be finely adjusted along the second elongated oval hole 123 to maintain its relative position with the sliding member 11 and the mounting plate 22. This not only accommodates the cumulative tolerances of the machining and assembly of various parts, reducing assembly accuracy requirements, but also provides space for the connecting assembly 3 to move slightly with the sliding member 11 during its sliding process, preventing the connecting assembly 3 from forming a rigid constraint on the second limiting plate 122 and restricting the normal sliding of the sliding member 11. In the embodiments of this application, the second elongated hole 123 has a width of 8 mm and a length of 12 mm, providing the connecting component 3 with a stroke for assembly adjustment and micro-following. Of course, in other embodiments, the size of the second elongated hole 123 can be the same as the size of the first elongated hole 114, as long as it meets the sliding requirements, and this application does not make specific limitations.

[0036] To ensure smooth sliding of sliding component 11 while reducing costs, please combine... Figure 6 As shown, in some embodiments of this application, the length of the spacer 12 is less than the length of the sliding member 11. Each sliding member 11 is matched with at least two spacers 12. When there are two spacers 12, they are located at opposite ends of the sliding member 11. When there are more than two spacers 12, they are evenly distributed to prevent the sliding member 11 from tilting during sliding. Furthermore, the shorter sliding member 11 is less expensive than a continuous spacer 12.

[0037] Please refer to some embodiments of this application. Figure 6 As shown, the top plate 111 and the flange plate 113 are separated at the spacer 12, forming a clearance opening 115. That is, at the length position corresponding to the spacer 12, the top plate 111 and the flange plate 113 are cut off, so that only the sliding plate 112 exists independently in the cross section of the sliding member 11 in this area. The clearance opening 115 provides operating space for the installation of the spacer 12. During assembly, the spacer 12 can be inserted into both sides of the sliding plate 112 from the clearance opening 115.

[0038] In some implementations of this application, please refer to Figures 2a-2b ,refer to Figure 3As shown, one possible structure for the mounting component 2 is an integrally formed inverted T-shaped structure. The base plate is laid horizontally on the roof joists 30, and the mounting plate 22 is formed by bending vertically upward from the middle of the base plate. Symmetrical flanges are formed on both sides of the mounting plate 22 on the base plate, and connection holes are provided on the flanges for fixing to the roof joists 30. Another possible structure for the mounting component 2 is that it includes two angle steels 21 that are attached back to each other. Each angle steel 21 has two mutually perpendicular side plates. One side of the two angle steels 21 is attached together and extends upward to form the mounting plate 22, and the other side of the two angle steels 21 extends horizontally to both sides to form the base plate, which is attached and fixed to the roof joists 30. Both structural forms of the mounting component 2 can achieve the same load-bearing and connection functions. In practical applications, the choice can be made according to the type of joists and the installation space. This application does not impose specific limitations on this.

[0039] The waterproof structure 40 will now be described in detail.

[0040] Please refer to some embodiments of this application. Figures 2a-2b As shown, one possible structure for the cover plate 42 is that it includes two side plates 421 at an acute angle, with the upper sides of the two side plates 421 connected, resulting in a vertical cross-section of the cover plate 42 that is either an inverted V-shape or a ridge shape. The ridge line is located directly above the junction of the long and short slopes, and the cross-section of the cover plate 42 is arranged symmetrically or approximately symmetrically about the ridge line. The lower sides of the two side plates 421 form an overlap edge 422, which fits against the upper surface of the elastic seal 41. When rainwater falls onto the cover plate 42, it flows along the ridge line to both sides, down the slope of the side plates 421, and finally drips from the overlap edge 422 onto the surface of the roof panel 20, where it is drained by the roof panel 20's own water system. Rainwater does not accumulate at the joint, improving waterproofing reliability.

[0041] To ensure connection reliability, please refer to [link / reference]. Figures 2a-2bAs shown, in some embodiments of this application, the waterproof structure 40 further includes a connector 43 for fixing the cover plate 42 and the elastic seal 41 to the roof panel 20. The overlapping edge 422 on the fixed side of the cover plate 42 is fixed to the elastic seal 41 and the long pitched roof panel 201 via the connector 43. The connector 43 passes through the overlapping edge 422 on the fixed side of the cover plate 42, the elastic seal 41, the plate body of the long pitched roof panel 201, and the flange plate 113 of the sliding member 11 from top to bottom, pressing and locking the four together. The side of the elastic seal 41 away from the fixed side is connected to the short pitched roof panel 202 via the connector 43, that is, the connector 43 passes through the free side area of ​​the elastic seal 41, the plate body of the short pitched roof panel 202, and the flange plate 113 of the sliding member 11 on the corresponding side, locking and fixing the free side area of ​​the elastic seal 41, the short pitched roof panel 202, and the flange plate 113 of the sliding member 11 on the corresponding side. Thus, the two sides of the elastic seal 41 are fixed to the roof panels 20 on both sides and the telescopic structure via connectors 43, respectively. The telescopic structure is completely covered and sealed on both sides by the elastic seal 41, ensuring a reliable seal. The cover plate 42 is locked to the elastic seal 41, roof panel 20, and sliding member 11 only on its fixed side via the same set of connectors 43. Its free side does not have connectors 43, but is only fastened to the elastic seal 41, allowing relative movement between the free side of the cover plate 42 and the elastic seal 41, and between the elastic seal 41 and the roof panel 20 on that side. Under temperature changes, the fixed side of the cover plate 42 moves synchronously with the long-slope roof panel 201, while the free side slides relative to the short-slope roof panel 202 on the surface of the elastic seal 41. At the same time, the elastic deformation of the elastic seal 41 absorbs the deformation caused by the displacement of the free-side roof panel 20. The temperature deformation of the two roofs is released through the sliding interface between the cover plate 42 and the elastic seal 41 and the elastic deformation of the elastic seal 41 itself, without interfering with each other.

[0042] Please refer to some embodiments of this application. Figures 2a-2b As shown, connector 43 is a waterproof lantern rivet. After riveting, the rivet head face is tightly fitted to the surface of the connected parts, and the rivet shank expands to fill the riveting hole during the riveting process. The rivet itself has waterproof sealing properties, preventing rainwater from seeping into the roof panel 20 through the gap between the rivet shank and the hole wall. Compared to ordinary blind rivets or self-tapping screws, the waterproof lantern rivet has a larger head area, resulting in a larger pressing area on the elastic seal 41 and cover plate 42, and a more uniform pressing force distribution, making it less likely to cause damage due to localized overpressure on the surface of the elastic seal 41. In some embodiments of this application, the elastic seal 41 is a fluorocarbon film butyl self-adhesive roll material. The fluorocarbon film surface layer has excellent UV aging resistance and chemical stability, and the butyl self-adhesive layer has strong adhesion to the metal surface of the roof panel 20 and the adhesive seal 45, preventing delamination or peeling under repeated stretching and deformation of the roof panel 20 due to temperature changes.

[0043] Since the elastic seal 41 is made of flexible butyl polymer material and the waterproof lantern rivet is made of hard metal, direct contact and locking between the two can easily lead to localized stress concentration and cutting damage. Therefore, in some embodiments of this application, please refer to... Figures 2a-2b As shown, the waterproof structure 40 also includes a pressure strip 44, which is disposed on the side of the elastic seal 41 away from the fixed side and located between the connector 43 and the elastic seal 41. The pressure strip 44 abuts against the limiting end of the connector 43. The pressure strip 44 can disperse the concentrated pressure caused by the single-point locking of the waterproof lantern rivet. The hard limiting end of the rivet will not directly squeeze the flexible elastic seal 41. By expanding the pressing contact area through the pressure strip 44, the single-point pressure is converted into a linear uniform pressure, avoiding the local high pressure of the rivet causing the elastic seal 41 to be crushed, perforated or irreversibly plastically damaged when the elastic seal 41 is repeatedly pulled by the relative displacement of long and short slopes. The pressure strip 44 can isolate the rivet edges from the elastic seal 41. Under the reciprocating working conditions of the cover plate 42 sliding freely and the elastic seal 41 continuously stretching and retracting, it can withstand friction and compression, preventing the rivet from cutting and wearing through the elastic seal 41 over a long period of time. The pressure strip 44 can use the rivet locking force to evenly press the side of the elastic seal 41 onto the roof panel 20, eliminating the small gaps between the elastic seal 41 and the metal panel surface, and forming an auxiliary sealing barrier around the rivet opening. Together with the sealing performance of the waterproof lantern rivet itself, it can doubly block the path of rainwater seeping down along the nail hole and the panel seam, improving the waterproof reliability of the junction.

[0044] Furthermore, in some embodiments of this application, please refer to Figures 2a-2b As shown, the width of the pressure strip 44 is 20mm, which can form a sufficient linear pressure-bearing coverage area based on the assembly size of the waterproof lantern rivets. This ensures that the locking pressure is evenly distributed within the action area of ​​a single rivet, avoiding local stress concentration at the edge of the rivet and cutting the flexible elastic seal 41 due to the narrowness of the pressure strip 44. At the same time, the width of the pressure strip 44 is not too large, which would squeeze the elastic deformation space of the fluorocarbon film butyl self-adhesive roll material, ensuring that the elastic seal 41 has a sufficient area to absorb the temperature displacement difference of the long and short pitched roof panels 20 by its own expansion and contraction.

[0045] To further enhance the sealing performance between the elastic seal 41 and the roof panel 20, please refer to some embodiments of this application. Figures 2a-2b As shown, the waterproof structure 40 also includes an adhesive sealant 45, which is disposed between the two sides of the elastic sealant 41 and the corresponding sides of the roof panel 20. The adhesive sealant 45 enhances the connection strength between the elastic sealant 41 and the roof panel 20 through adhesive force, preventing the elastic sealant 41 from detaching from the roof panel 20 under wind load; on the other hand, it prevents rainwater from seeping into the sealed area through capillary gaps between the sides of the elastic sealant 41 and the roof panel 20 through sealing and filling.

[0046] Furthermore, in some embodiments of this application, please refer to Figures 2a-2b As shown, the adhesive seal 45 can be butyl tape. Butyl tape has excellent adhesion, waterproof sealing and weather resistance. It is not easy to age and crack when exposed to the outdoor environment for a long time. The bond between the elastic seal 41 and the roof panel 20 can still maintain an effective seal under repeated thermal expansion and contraction displacement of the roof panel 20.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A telescopic expansion joint for connecting long and short slopes, characterized in that, include: A telescopic structure includes a mounting component installed on a roof joist and sliding components. The mounting component has an upwardly extending mounting plate, and a sliding component is respectively provided on both sides of the mounting plate. The sliding components are movable independently relative to the mounting component. The adjacent edges of the long-slope roof panel and the short-slope roof panel are respectively overlapped and fixed to the corresponding sliding components. A waterproof structure includes an elastic seal and a cover plate. The elastic seal is installed on the telescopic structure, with one side connected to the long-sloped roof panel and the other side connected to the short-sloped roof panel. The cover plate is installed on the elastic seal, with one side of the cover plate being a fixed side. The fixed side is fixed to the elastic seal and the roof panel on the corresponding side.

2. The expansion joint device for long and short slopes according to claim 1, characterized in that, The telescopic structure also includes: A connecting component passes sequentially through the sliding component located on one side of the mounting plate, the mounting plate, and the sliding component located on the other side of the mounting plate to restrict the position of the sliding component on the mounting plate; The sliding component has a first elongated hole, and the connecting component passes through the first elongated hole and slides along the first elongated hole.

3. The expansion joint device for long and short slopes according to claim 2, characterized in that, The sliding assembly includes: A sliding component includes a top plate, a sliding plate located on one side of the top plate, and a flange plate located on the other side of the top plate. The edge of the long-sloped roof panel or the short-sloped roof panel overlaps the top plate. The sliding plate has a first elongated hole. A spacer, the spacer comprising a first limiting plate and a second limiting plate connected at their bottom ends and arranged in parallel; The sliding plate is located between the first limiting plate and the second limiting plate; The distance between the first limiting plate and the second limiting plate is greater than the thickness of the sliding plate; The first limiting plate abuts against the mounting plate. The first limiting plate is provided with a circular hole, and the second limiting plate is provided with a second elongated hole that matches the first elongated hole and allows the connecting component to pass through.

4. The expansion joint device for long and short slopes according to claim 3, characterized in that, The length of the spacer is less than the length of the sliding member; The top plate and the flange plate are separated at the spacer, forming a clearance opening.

5. The expansion joint device for long and short slopes according to claim 1, characterized in that, The mounting component is a one-piece inverted T-shaped structure; or The mounting component includes two angle steels that are attached to each other with their backs to each other. One side of the two angle steels is attached together and extends upward to form the mounting plate. The other side of the two angle steels extends to both sides and is fixed to the roof joists.

6. The expansion joint device for long and short slopes according to any one of claims 1 to 5, characterized in that, The cover plate includes two side plates at an acute angle. The upper side plates are connected, and the lower side plates are overlapping. The overlapping side plates are in contact with the elastic seal.

7. The expansion joint device for long and short slopes according to claim 6, characterized in that, Also includes: The connector is used to fix the overlapping edge of the fixed side to the elastic seal and the roof panel on the corresponding side. The side of the elastic seal away from the fixed side is connected to the roof panel on the corresponding side through the connector.

8. The expansion joint device for long and short slopes according to claim 7, characterized in that, Also includes: A pressure strip is disposed on the side of the elastic seal opposite to the fixed side and located between the connector and the elastic seal, and the pressure strip abuts against the limiting end of the connector.

9. The expansion joint device for long and short slopes according to claim 6, characterized in that, Also includes: An adhesive seal is provided between the two sides of the elastic seal and the roof panel on the corresponding side.

10. A metal roof, characterized in that, include: Roof joists; as well as A roof panel system is laid on the roof joists, and the roof panel system is connected to the roof joists at the junction of the long and short slopes using an expansion joint as described in any one of claims 1 to 9.

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