A rolling door winding protection structure

Abstract

The application discloses a rolling door winding protection structure, which comprises a buffer layer, the front end of the buffer layer is connected with a rolling door shaft, the thickness of the front end of the buffer layer is the largest, and the thickness of the rear end of the buffer layer is the smallest. After winding, the door sheet located at the innermost side and bearing the largest stress corresponds to the front end of the buffer layer with the largest thickness, and the strongest buffer support can be provided; and the door sheet located at the outermost side and bearing smaller stress corresponds to the rear end of the buffer layer with smaller thickness. The design makes the buffer capacity and the pressure accurately matched, and the protection effect of the key position is ensured, and material waste is avoided.

Description

Technical Field

[0001] This invention relates to the field of roller shutter technology, and more specifically, to a roller shutter rewind protection structure, particularly a structure that can provide differentiated buffer protection for the door panels during the rewinding process and optimize the overall thickness after rewinding. Background Technology

[0002] Roller shutters are composed of several hinged door panels, which are stacked on top of each other on a roller when rolled up. In existing technology, to prevent noise and wear caused by rigid collisions between the door panels, a buffer layer has been added between them. For example, existing patent CN 117248814 A proposes setting an independent buffer layer on the inner surface of the roller shutter, which rolls up synchronously with the door panels, providing isolation and cushioning. However, in practical applications, after the roller shutter is rolled up, the innermost door panel (i.e., the first to be rolled up and with the smallest radius) bears enormous compressive stress from all the outermost door panels, while the outermost door panels experience relatively less stress. Existing buffer layers typically use a uniform thickness design, which leads to two problems: 1. Uneven stress distribution and poor protection: The buffer layer of equal thickness may not provide enough cushioning at the innermost part where the pressure is greatest, causing the door panels to still squeeze each other; while at the outermost part where the pressure is less, the buffer layer of equal thickness may result in material waste.

[0003] 2. Large overall thickness after rewinding: The buffer layer of equal thickness is rewound together with the door panel, which will significantly increase the total thickness of the door panel after rewinding. This means that a larger diameter roller and shell are required, which increases material costs and installation space.

[0004] Therefore, it is necessary to design a protective structure that can provide differentiated buffering based on the stress on the door panel after winding, while also optimizing the winding thickness. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems of uneven stress and excessive overall thickness after rolling up caused by the uniform thickness design of the buffer layer in existing roller shutter doors, and to provide a roller shutter door rolling protection structure.

[0006] The technical solution of this invention: A roller shutter door retraction protection structure includes a buffer layer, characterized in that: the front end of the buffer layer is connected to the roller shutter door hinge, the front end of the buffer layer has the greatest thickness, and the rear end has the smallest thickness.

[0007] As a preferred technical solution, the thickness of the buffer layer gradually decreases from the front end to the back end.

[0008] As a preferred technical solution, the thickness of the buffer layer is divided into 2-5 segments, with the thickness of each segment decreasing sequentially from the front end to the back end.

[0009] As a preferred technical solution, the number of buffer layers is 1-3, and they are evenly distributed along the width direction of the roller shutter door.

[0010] As a preferred technical solution, the width of the buffer layer is 20%-90% of the width of the roller shutter door.

[0011] As a preferred technical solution, the rear end of the buffer layer is connected to the rotating shaft. When the roller shutter door is opened, the buffer layer is rolled up on the rotating shaft, and when the roller shutter door is rolled up, the buffer layer is rolled up together with the roller shutter door.

[0012] As a preferred technical solution, a coiling spring mechanism is installed inside the rotating shaft.

[0013] As a preferred technical solution, the front of the roller shutter door is printed with a custom pattern.

[0014] The beneficial effects of this invention are: 1. Differentiated Buffering, Matched Stress: The thickness of the buffer layer gradually decreases from the front end (near the hinge) to the rear end (away from the hinge). After winding, the innermost door panel, which experiences the greatest stress, corresponds to the front end with the thickest buffer layer, providing the strongest cushioning support; while the outermost door panel, which experiences less stress, corresponds to the rear end with the thinner buffer layer. This design ensures a precise match between buffering capacity and the applied pressure, guaranteeing protection for critical areas while avoiding material waste.

[0015] 2. Reduced overall thickness after rewinding: Because the buffer layer is thicker at the front and thinner at the rear, when the buffer layer is rewound with the door panel, the radial space occupied by the innermost thick buffer layer matches its required large radius; while as it is stacked outwards, the thickness of the buffer layer gradually decreases, which precisely compensates for the increase in perimeter caused by the increase in radius. Compared to buffer layers of equal thickness, this invention can significantly reduce the total thickness of the door panel after rewinding and stacking, thereby allowing the use of smaller diameter rollers and housings, reducing material costs and installation space requirements.

[0016] 3. Simple structure and easy to implement: The buffer layer with varying thickness or multi-segment thickness can be achieved through various processes such as weaving, molding or bonding. The cost increase is limited, but the effect is significantly improved.

[0017] 4. Independent winding and smooth operation: The rear end of the buffer layer is connected to a rotating shaft with a coil spring mechanism, which automatically winds up the buffer layer when the roller shutter door is opened to avoid the buffer layer from accumulating; when the roller shutter door is rolled up, the buffer layer is released synchronously with the door panel and wound into the roller shaft. The whole process is automatic and synchronized, requiring no additional power. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the roller shutter door and the buffer layer working together to roll up. The thickness variation of the buffer layer is simplified in the diagram.

[0019] Figure 2 This is a schematic diagram showing the thickness variation of the buffer layer.

[0020] Figure 3 This is a schematic diagram of the overall installation structure of Example 1.

[0021] Figure 4 This is a schematic diagram of the overall installation structure of Example 2.

[0022] Figure 5 This is a schematic diagram of the overall installation structure of the two buffer layers.

[0023] Figure 6 This is a schematic diagram of the overall installation structure of the three buffers.

[0024] Figure 7 This is a schematic diagram of the appearance of Example 4. Detailed Implementation

[0025] Example 1: Example 1 Figure 1 and Figure 3 This embodiment provides a roller shutter door retraction protection structure.

[0026] The structure includes a cushioning layer. The cushioning layer is made of a flexible, abrasion-resistant material (such as a multi-layer polyester fiber composite, rubber sheet, or foam material) and has a certain degree of elasticity.

[0027] The front end of the buffer layer is fixedly connected to the door hinge (i.e., the roller) of the roller shutter door. It should be noted that "front end" refers to the end of the buffer layer that is connected to roller 2; correspondingly, "rear end" refers to the end away from roller 2.

[0028] The core improvement of this embodiment lies in the fact that the thickness of the buffer layer gradually changes from the front end to the back end, with the front end having the greatest thickness and the back end having the smallest thickness. For example, the front end thickness can be designed to be 3mm-5mm, and the back end thickness can be designed to be 0.5mm-1mm, with a smooth transition in between.

[0029] Working principle: As the roller shutter door rolls up, the door panels rise one by one from the bottom and overlap around the roller. The first panel to be rolled up (the innermost panel) contacts the front end with the thickest buffer layer and rolls up together. As the rolling continues, subsequent panels contact the gradually thinner parts of the buffer layer in turn.

[0030] Because the innermost door panel bears the greatest pressure from all the outer door panels, the thickest buffer layer is located here, providing the strongest cushioning and isolation effect, effectively preventing rigid collisions and pattern wear between door panels. As you move outwards, the pressure on the door panels decreases, corresponding to a gradually thinning buffer layer, yet still providing sufficient protection.

[0031] Meanwhile, since the thickness of the buffer layer decreases from the inside to the outside, it compensates for the increase in perimeter caused by the increase in the winding radius, making the total thickness after stacking significantly smaller than that of the scheme using a buffer layer of equal thickness.

[0032] The number of buffer layers can be set to one, two, or three, evenly distributed along the width direction (i.e., horizontal direction) of the roller shutter door. For example, on a wider roller shutter door, three buffer layers—left, center, and right—can be installed to ensure uniform isolation. The overall width of the buffer layers can be set according to the door width and protection requirements, ranging from 20% to 90% of the roller shutter door width.

[0033] Example 2: The difference between this embodiment and Embodiment 1 is that the thickness of the buffer layer is not a continuous gradual change, but is divided into 2-5 segments, with the thickness of each segment decreasing sequentially from the front end to the back end.

[0034] For example, in a three-section design: the first section (near the front) is 4mm thick, the second section is 2.5mm thick, and the third section (near the rear) is 1mm thick. There can be obvious thickness steps between each section, or a smooth transition can be set.

[0035] This segmented design is simpler to manufacture than a continuous gradient design. It can be achieved by splicing together material sheets of different thicknesses or by molding segments of different thicknesses onto the same substrate. Its working principle is the same as in Example 1: a buffer segment of appropriate thickness is matched according to the different radial positions of the retracted door panel (corresponding to different stress zones). In this example, the buffer layer is relatively wide, such as... Figure 4 .

[0036] Example 3: Based on Example 1 or Example 2, this example adds a winding management structure at the back end of the buffer layer.

[0037] The rear end of the buffer layer is connected to a separate rotating shaft. The rotating shaft contains a coiling spring mechanism (similar to the constant force spring mechanism inside a clockwork spring or measuring tape). This coiling spring mechanism is mounted on the top of the roller shutter door.

[0038] Work process: When the roller shutter door rolls up (i.e., opens), the door panels move upwards, causing the buffer layer to move upwards as well. At this time, the spring force of the coil spring mechanism is less than the pulling force of the door panels as they rise. Under the action of the coil spring mechanism, the rotating shaft slowly reverses, releasing the buffer layer from the rotating shaft. This allows the buffer layer to move and roll up with the door panels in the direction of the rotating shaft.

[0039] When the roller shutter door opens (i.e. closes), the door panels move downwards. Under the elastic force of the coil spring mechanism, the rotating shaft automatically rotates forward, rewinding the buffer layer onto the shaft, keeping the buffer layer taut and preventing it from being piled up haphazardly.

[0040] This independent pivot structure ensures that the buffer layer is neatly stowed when the roller shutter door is fully extended, preventing it from piling up at the bottom and affecting aesthetics or causing damage. At the same time, the constant tension provided by the coil spring mechanism helps the buffer layer adhere smoothly to the back of the door panel, enhancing its protective effect.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various improvements and modifications can be made without departing from the spirit and principle of the present invention, such as adjusting the specific shape of the gradient curve, changing the number of segments and thickness values, etc. These improvements and modifications should also be considered within the scope of protection of the present invention.

[0042] Example 4: Figure 7 This embodiment provides a roller shutter door with a customizable appearance.

[0043] This roller shutter door is composed of several hinged panels made of metal materials such as galvanized steel sheet or aluminum alloy. The outer side of the panels (the side facing outdoors or the user) is directly printed with a custom pattern layer using a UV flatbed printer. This pattern layer can be any graphic desired by the user, such as a brand logo, promotional text, artistic images, or wood / stone grain patterns. The UV printing process allows the ink to cure instantly, bonding firmly to the metal surface and providing excellent weather resistance and scratch resistance.

[0044] A buffer layer is installed on the inside of the roller shutter door (the side facing the interior or doorway). This buffer layer is made of a flexible, wear-resistant material, such as a smooth high-density polyester fiber cloth, ultra-high molecular weight polyethylene fiber cloth, or a rubber sheet with some elasticity. The front end of the buffer layer is fixedly connected to the roller shutter door's roller shaft. The thickness of the buffer layer gradually changes from the front to the rear end, with the thickness being greatest at the front and least at the rear.

[0045] The core of this embodiment lies in the fact that when the roller shutter door is rolled up, the buffer layer is rolled into the roller along with the door panels. During the rolling process, the space between two adjacent door panels—specifically, between the patterned layer on the outer side of one door panel and the metal back side on the inner side of the previous door panel—is filled and isolated by the buffer layer 2 (e.g., Figure 2 (As shown). The softness and low friction of the buffer layer ensure that the patterned layer does not come into direct contact or rub against any hard surface when it is wound up, thus providing effective protection.

Claims

1. A roller shutter door retraction protection structure, comprising a buffer layer, characterized in that: The front end of the buffer layer is connected to the door hinge of the roller shutter. The front end of the buffer layer is the thickest, and the rear end is the thinnest.

2. The roller shutter door retraction protection structure according to claim 1, characterized in that: The thickness of the buffer layer gradually decreases from the front end to the back end.

3. The roller shutter door retraction protection structure according to claim 1, characterized in that: The thickness of the buffer layer is divided into 2-5 segments, with the thickness of each segment decreasing sequentially from the front end to the back end.

4. The roller shutter door retraction protection structure according to any one of claims 1-3, characterized in that: The number of buffer layers is 1-3, and they are evenly distributed along the width of the roller shutter door.

5. The roller shutter door retraction protection structure according to claim 4, characterized in that: The width of the buffer layer is 20%-90% of the width of the roller shutter door.

6. The roller shutter door retraction protection structure according to claim 4, characterized in that: The rear end of the buffer layer is connected to the pivot. When the roller shutter door is opened, the buffer layer is rolled up on the pivot. When the roller shutter door is closed, the buffer layer is rolled up together with the roller shutter door.

7. The roller shutter door retraction protection structure according to claim 6, characterized in that: A coil spring mechanism is installed inside the rotating shaft.

8. The roller shutter door retraction protection structure according to claim 4, characterized in that: The front of the roller shutter door is printed with a custom pattern.

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