Welding-free plug-in sealing head of bottom beam for fireproof rolling shutter door
By designing a weld-free plug-in end cap for the bottom beam of a fireproof rolling shutter door, the problem of unsealed ends of the bottom beam is solved, thereby improving the sealing and stability of the rolling shutter door and enhancing its fire resistance and aesthetics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN DATANG FIRE TECH CO LTD
- Filing Date
- 2025-05-15
- Publication Date
- 2026-04-24
AI Technical Summary
The bottom beams of fireproof roller shutters on the market are not sealed at both ends, resulting in gaps between the ends and the slide rails, which affects sealing and aesthetics.
A weld-free plug-in end cap for the bottom beam of a fireproof roller shutter door is designed. The end cap is integrally formed, with the plug-in part plugging into the end of the bottom beam and the snap-fit part snapping into the slide rail groove. The whole is made of stainless steel bending to ensure stable installation.
It enhances the overall sealing and stability of the fireproof roller shutter door, improves its aesthetics, and ensures that the roller shutter door closes smoothly during a fire, preventing the spread of fire and smoke.
Smart Images

Figure CN224161655U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of roller shutter door equipment, and in particular relates to a weld-free plug-in end cap for the bottom beam of a roller shutter door. Background Technology
[0002] The bottom beam in a fire-resistant roller shutter door is a horizontal beam at the bottom of the shutter curtain. It is a key component ensuring the safety of the entire door system. Firstly, the bottom beam significantly enhances the structural strength and stability of the curtain, especially during a fire. It effectively resists negative pressure in the fire, preventing the curtain from being overturned and ensuring the fire-resistant roller shutter door can close smoothly and perform its fire-resistant function. Secondly, the shape of the bottom end of the bottom beam is generally carefully designed to ensure a tight seal between the curtain and the ground, preventing the spread of fire and smoke, buying valuable time for rescue and evacuation, and providing a safer environment for those escaping. However, bottom beams on the market are generally hollow steel channel designs, with no sealing measures at both ends. This results in a gap between the ends of the bottom beam and the roller shutter door track, affecting aesthetics and compromising the overall sealing of the roller shutter door. Therefore, this invention provides a weld-free plug-in end cap for the bottom beam of a fire-resistant roller shutter door to solve the above problems. Summary of the Invention
[0003] To address the shortcomings of existing technologies, this utility model provides a weld-free plug-in end cap for the bottom beam of a fireproof rolling shutter door.
[0004] The technical solution of this utility model is as follows: a weld-free plug-in end cap for the bottom beam of a fireproof roller shutter door. The end cap is used to seal both ends of the bottom beam of the roller shutter door and is snapped between the end of the bottom beam and the roller shutter door slide rail. The end cap is integrally formed and has an overall convex design. One side of the end cap is a plug-in part for plugging into the end of the bottom beam; the other side is a snap-in part for snapping into the slide rail groove.
[0005] Furthermore, the height of the end cap insertion portion is not greater than the inner diameter height of the bottom beam.
[0006] Furthermore, the width of the end cap insertion portion is not greater than the inner diameter width of the bottom beam.
[0007] Furthermore, the width of the end cap snap-fit portion is not greater than the width of the inner groove of the slide rail.
[0008] Furthermore, the end cap is made of 2-3mm thick stainless steel bent into shape.
[0009] The beneficial effects of this utility model are:
[0010] 1. The present invention provides a weld-free plug-in end cap for the bottom beam of a fireproof roller shutter door, which is easy to install and can seal both ends of the bottom beam of the roller shutter door to enhance the overall sealing performance of the fireproof roller shutter door and further enhance the fireproof effect;
[0011] 2. In the design scheme of this utility model, the end cap serves as a connecting structure between the bottom beam of the roller shutter door and the slide rail, which can enhance the lateral stability of the roller shutter door and also achieve a certain aesthetic effect. Attached Figure Description
[0012] Figure 1 This is a perspective view of the present utility model;
[0013] Figure 2 This is a cross-sectional view of the end cap used to seal the bottom beam in this utility model;
[0014] Figure 3 This is a cross-sectional view of the end cap in this utility model;
[0015] Figure 4 This is a reference diagram showing the usage state of this utility model;
[0016] Figure 5 for Figure 4 A magnified view of part A in the middle.
[0017] Reference numerals: 1. End cap; 2. Bottom beam; 3. Slide rail; 101. Insertion part; 102. Snap-fit part; 301. Slide groove. Detailed Implementation
[0018] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present invention or its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values set forth in these embodiments should be interpreted as merely exemplary and not as limiting.
[0019] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0020] like Figure 1-5 As shown, a weld-free plug-in end cap for the bottom beam of a fireproof roller shutter door is disclosed. The end cap 1 is used to seal both ends of the bottom beam 2 of the roller shutter door, and it is snapped between the end of the bottom beam 2 and the roller shutter door slide rail 3. The end cap 1 is integrally formed and has a convex design. One protruding part of the end cap 1 is a plug-in part 101, used for plugging into the end of the bottom beam 2; the other side is a snap-in part 102, used for snapping into the slide groove 301 of the slide rail 3. Figure 3 As shown in the figure, the side with the dotted line is the insertion part 101, and the other side is the snap-fit part 102.
[0021] Specifically, the height of the plug part 101 of the end cap 1 is equal to the inner diameter height of the bottom beam 2.
[0022] Specifically, the width of the insertion part 101 of the end cap 1 is equal to the inner diameter width of the bottom beam 2.
[0023] Specifically, the width of the snap-fit part 102 of the end cap 1 is equal to the width of the inner groove 301 of the slide rail 3.
[0024] Specifically, the end cap 1 is made of 2mm thick stainless steel bent into shape.
[0025] like Figure 4 As shown in Figure 5, the end cap 1 is easy to install. When the roller shutter in the roller shutter door slides into the slide rail 3 from the top of the slide rail 3 on both sides of the door opening, the insertion part 101 of the end cap 1 is inserted into the end of the bottom beam 2. The protruding part inside the bottom beam 2 can limit the insertion of the end cap 1. Then, the snap-fit part 102 of the end cap 1 is slid into the slide groove 301 of the slide rail 3, thus completing the installation. Among them, the slide groove 301 of the slide rail 3, together with the protruding part inside the bottom beam 2, can limit the end cap 1 laterally; the height of the insertion part 101 is the same as the inner diameter height of the bottom beam 2. After the insertion part 101 is inserted into the bottom beam 2, it can limit the end cap 1 longitudinally, thereby ensuring that the end cap 1 will not shift after installation.
[0026] It should be noted that the protrusion at the bottom of the bottom beam 2 (the groove at the bottom end of the bottom beam 2) is a groove-shaped design to better seal the bottom beam 2 with the bottom end of the roller shutter door opening, that is, to ensure the seal between the door curtain and the ground. The ground at the bottom end of the door opening generally has a protrusion that matches the shape of the groove in the bottom beam 2. The groove in the bottom beam 2 can be used to block and limit the insertion depth of the end cap 1, thus serving as a limiting function.
[0027] After the end cap 1 is installed, it not only has an aesthetic effect on both ends of the bottom beam 2, but also helps to enhance the overall stability of the roller shutter door. More importantly, it can further enhance the overall sealing performance of the fireproof roller shutter door.
[0028] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.
[0029] The embodiments described above only illustrate some implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A weld-free plug-in end cap for the bottom beam of a fireproof roller shutter door, wherein the end cap is used to seal both ends of the bottom beam of the roller shutter door and is snapped between the end of the bottom beam and the roller shutter door slide rail, characterized in that: The end cap is integrally formed and has an overall convex design; one side of the end cap has a protruding part for insertion into the end of the bottom beam; the other side has a snap-fit part for snap-fitting into the slide rail groove.
2. The weld-free plug-in end cap for the bottom beam of a fireproof rolling shutter door according to claim 1, characterized in that: The height of the end cap insertion part is not greater than the inner diameter height of the bottom beam.
3. The weld-free plug-in end cap for the bottom beam of a fireproof rolling shutter door according to claim 1, characterized in that: The width of the end cap insertion part is not greater than the inner diameter width of the bottom beam.
4. The weld-free plug-in end cap for the bottom beam of a fireproof rolling shutter door according to claim 1, characterized in that: The width of the end cap snap-fit part is not greater than the width of the inner groove of the slide rail.
5. The weld-free plug-in end cap for the bottom beam of a fireproof rolling shutter door according to claim 1, characterized in that: The end cap is made of 2-3mm thick stainless steel bent into shape.