A falling prevention structure for a double curtain door

Abstract

This utility model provides an anti-fall structure for double-curtain roller doors, relating to the field of roller door technology. It includes a first curtain roller, a second curtain roller, and a fusible roller, with a transmission chain mounted on the fusible roller. A blocking section is provided between the first and second curtain rollers, comprising a first blocking block, a second blocking member, and a connecting post. The first blocking block has a first blocking post, and the second blocking member has a second blocking post. The melting point of the connecting post is lower than that of the fusible roller. This utility model's anti-fall structure for double-curtain roller doors features a blocking block at each of the two curtain rollers. The blocking post of the blocking block can engage with a gear on the outside of the curtain roller to prevent the door beam from falling. Furthermore, the melting point of the connecting post between the two blocking blocks is lower than that of the fusible roller, allowing the connecting post to break before the fusible roller in the event of a fire, thus securing the curtain rollers in advance and effectively preventing falls, resulting in higher safety.

Description

Technical Field

[0001] This utility model relates to the field of roller shutter door technology, and in particular, it relates to an anti-fall structure for double-curtain roller shutter doors. Background Technology

[0002] A roller shutter door is a door with multiple articulated door panels linked together. It moves up and down within a fixed track, rotating around a central roller at the top. Roller shutter doors are commonly used in shops. Like a wall, a roller shutter door serves as a horizontal partition. It consists of multiple parts, including curtain panels, base plate, guide rails, supports, roller, housing, control box, roller door motor, limit switch, lintel, manual quick-release switch, push-button switch, and safety device. It is generally installed in locations where it is inconvenient to use a wall for partitioning.

[0003] Most roller shutters are operated by a motor that drives a chain to rotate the roller shutter shaft. The roller shutter shaft rolls up and down the roller shutter body to achieve the raising and lowering of the roller shutter. There is usually a brake device installed at the motor of the roller shutter. However, this brake device can only stop the motor. If the chain breaks, even if the brake device stops the motor, the roller shutter body may still fall and injure people.

[0004] Therefore, there is an urgent need for a device that can directly act on the roller shutter door to stop it from falling when the chain breaks. For example, Chinese invention patent CN109779509A discloses a roller shutter door anti-fall device, mainly used to prevent roller shutter doors from falling and injuring people. It has a simple structure and can prevent roller shutter doors from falling in various states, providing reliable protection. It consists of a pair of stop devices and a triggering device. Its working principle is: when the roller shutter door curtain rises and stops, the electromagnets A and B of the pair of stop devices are simultaneously de-energized, and the spring... The elastic extension causes the piston and stop plate to move towards the inner surface of the U-shaped base plate of the left and right curtain sliding sleeves and press against the inner surface. At this time, regardless of whether the sprocket of the curtain drive device is disengaged, broken or other abnormal, the pair of stop devices can prevent the curtain from falling. When the curtain of the roller shutter door descends, if the curtain suddenly falls for some reason, the triggering device triggers the electromagnetic switch to cut off the power supply to the electromagnets A and B of the pair of stop devices. The left and right stop plates press against the inner surface of the U-shaped base plate to prevent the curtain from falling.

[0005] However, with changing user needs, double-layer roller shutters (i.e., two-tiered roller shutters) are becoming increasingly popular due to their better protection. In a double-layered roller shutter, one motor drives two roller shutter shafts simultaneously via a chain, raising and lowering both shutter bodies. Even with the aforementioned anti-fall devices, the following drawbacks remain: Double-layered roller shutters, with their two doors, have a significant total weight, making it difficult to stop them using friction stops; furthermore, when the roller shutter reaches high temperatures, the door body will fall under gravity the moment the fusible roller melts, and if the anti-fall device is not triggered in time, it will still be ineffective in preventing falls and failing to protect pedestrians below.

[0006] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable and efficient anti-fall structure for double-curtain roller doors. Utility Model Content

[0007] The purpose of this invention is to provide an anti-fall structure for double-curtain roller doors. A blocking block is set at each of the two curtain rollers. The blocking post of the blocking block can be locked with the gear on the outside of the curtain roller to prevent the door beam from falling. Moreover, the melting point of the connecting post between the two blocking blocks is lower than that of the melting roller. In the event of a fire, the connecting post can break before the melting roller, locking the curtain roller in advance, effectively preventing falls and providing higher safety.

[0008] To achieve the above objectives, this utility model employs the following technical solution:

[0009] A fall prevention structure for a double-curtain roller door includes a first curtain roller, a second curtain roller, and a fusible roller. The fusible roller is provided with a transmission chain for connecting to the first and second curtain rollers. A blocking portion is provided between the first and second curtain rollers. The blocking portion includes a first blocking block, a second blocking block, and a connecting post for connecting the first and second blocking blocks. The first blocking block is provided with a first blocking post extending towards the first curtain roller, and the second blocking block is provided with a second blocking post extending towards the second curtain roller. The melting point of the connecting post is lower than the melting point of the fusible roller.

[0010] As a preferred embodiment of this utility model, it includes a mounting frame; the first curtain roller, the second curtain roller, and the fusion roller are all mounted to the mounting frame via mounting bearings.

[0011] As a preferred embodiment of the present invention, the mounting bracket is provided with a first rotating shaft for hinged connection with the first blocking block, the first blocking block rotates around the first rotating shaft, and the first rotating shaft is provided with a first torsion spring for connection with the first blocking block.

[0012] As a preferred embodiment of this invention, a first clamp is provided on the first rotating shaft to limit the position of the first blocking block.

[0013] As a preferred embodiment of the present invention, the mounting bracket is provided with a second rotating shaft for hinged connection with the second blocking block, the second blocking block rotates around the second rotating shaft, and a second torsion spring is provided on the second rotating shaft for connection with the second blocking block.

[0014] As a preferred embodiment of this invention, the elastic forces of the first torsion spring and the second torsion spring are in opposite directions.

[0015] As a preferred embodiment of this invention, a tensioning roller for connecting to the transmission chain is further provided between the first curtain roller and the second curtain roller.

[0016] As a preferred embodiment of the present invention, the fusing roller is disposed on the side of the second curtain roller away from the first curtain roller.

[0017] As a preferred embodiment of this invention, a fuser roller mounting plate is provided on the outer side of the fuser roller, and the melting point of the connecting column is lower than the melting point of the fuser roller mounting plate.

[0018] As a preferred embodiment of this utility model, both the first blocking block and the second blocking block are integrally formed parts.

[0019] The beneficial effects of this utility model's anti-fall structure for double-curtain roller doors are as follows: a blocking block is set at each of the two curtain rollers, and the blocking post of the blocking block can be locked with the gear on the outside of the curtain roller to prevent the door beam from falling; moreover, the melting point of the connecting post between the two blocking blocks is lower than that of the melting roller, so that the connecting post can break before the melting roller in the event of a fire, thus locking the curtain roller in advance, effectively preventing falls, and providing higher safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of one embodiment of the anti-fall structure for a double-curtain roller door according to the present invention;

[0021] Figure 2 This is a schematic diagram of the structure at the first rotating shaft in one embodiment of the anti-fall structure for a double-curtain roller door according to the present invention;

[0022] In the diagram: 1. Mounting frame; 11. First curtain roller; 12. Second curtain roller; 13. Fusible roller; 131. Conveyor chain; 132. Fusible roller mounting plate; 14. Tensioning roller; 2. Blocking part; 21. First blocking block; 211. First blocking post; 212. First rotating shaft; 213. First torsion spring; 214. First clamp; 22. Second blocking block; 221. Second blocking post; 222. Second rotating shaft; 23. Connecting post. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement and steps of the modules and steps set forth in these embodiments do not limit the scope of the present invention.

[0025] At the same time, it should be understood that, for ease of description, the process shown in the attached diagram is not performed in isolation, but rather involves multiple steps that overlap.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and systems known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0029] Example 1: As Figures 1 to 2The illustration shows only one embodiment of the present invention. A fall prevention structure for a double-curtain roller door includes a first curtain roller 11, a second curtain roller 12, and a fusible roller 13. The fusible roller 13 is provided with a transmission chain 131 for connecting to the first curtain roller 11 and the second curtain roller 12. A blocking part 2 is provided between the first curtain roller 11 and the second curtain roller 12. The blocking part 2 includes a first blocking block 21, a second blocking block 22, and a connecting post 23 for connecting the first blocking block 21 and the second blocking block 22. The first blocking block 21 is provided with a first blocking post 211 extending towards the first curtain roller 11, and the second blocking block 22 is provided with a second blocking post 221 extending towards the second curtain roller 12. The melting point of the connecting post 23 is lower than the melting point of the fusible roller 13.

[0030] In this invention, the double-curtain roller door has two curtains, which means it requires two curtain rollers, namely a first curtain roller 11 and a second curtain roller 12. When the first curtain roller 11 rotates, it rolls up and unrolls the first curtain. When the second curtain roller 12 rotates, it rolls up and unrolls the second curtain. The first curtain roller 11 and the second curtain roller 12 are connected by a transmission chain 131, so that the first curtain roller 11 and the second curtain roller 12 can rotate synchronously. One of the rollers of the first curtain roller 11 and the second curtain roller 12 is directly driven by a drive motor (not shown in the figure), while the other roller rotates under the drive of the transmission chain 131.

[0031] In order to connect with the transmission chain 131, the first curtain roller 11 and the second curtain roller 12 are provided with meshing teeth on their outer sides.

[0032] Of course, in order to enable the double roller door to be equipped with a fire-fighting device, a fusing roller 13 is also connected to the transmission chain 131. When a fire occurs and high temperature is generated, the fusing roller 13 will melt, causing the transmission chain 131 to lose tension and the two door curtains to lose linkage.

[0033] To prevent the first curtain roller 11 and the second curtain roller 12 from accidentally falling and injuring people when they melt at the melting roller 13 under high temperature, a blocking part 2 is provided between the first curtain roller 11 and the second curtain roller 12. The blocking part 2 includes a first blocking block 21, a second blocking block 22, and a connecting post 23 for connecting the first blocking block 21 and the second blocking block 22.

[0034] The first blocking block 21 is provided with a first blocking post 211 extending toward the first curtain roller 11, and the second blocking block 22 is provided with a second blocking post 221 extending toward the second curtain roller 12; the melting point of the connecting post 23 is lower than the melting point of the fused roller 13.

[0035] In the event of a fire, before the melting roller 13 melts, the connecting column 23, which has a lower melting point, will melt in advance, disconnecting the connection between the first blocking block 21 and the second blocking block 22. This causes the first blocking column 211 of the first blocking block 21 to lock the meshing teeth of the first curtain roller 11, and the second blocking column 221 of the second blocking block 22 to lock the meshing teeth of the second curtain roller 12, thus securing the first curtain roller 11 and the second curtain roller 12 and preventing the two curtains from falling and injuring people.

[0036] This utility model discloses an anti-fall structure for double-curtain roller doors. A blocking block is set at each of the two curtain rollers. The blocking post of the blocking block can be locked with the gear on the outside of the curtain roller to prevent the door beam from falling. Moreover, the melting point of the connecting post between the two blocking blocks is lower than that of the melting roller. In the event of a fire, the connecting post can break before the melting roller, locking the curtain roller in advance, effectively preventing falls and providing higher safety.

[0037] Example 2, still as Figures 1 to 2 As shown, this is only one embodiment of the present invention. Based on the first embodiment, the present invention provides an anti-fall structure for a double curtain roller door, which includes a mounting frame 1; the first curtain roller 11, the second curtain roller 12 and the fusion roller 13 are all mounted on the mounting frame 1 through mounting bearings.

[0038] Furthermore, the mounting bracket 1 is provided with a first rotating shaft 212 for hinged to the first blocking block 21. The first blocking block 21 rotates around the first rotating shaft 212. The first rotating shaft 212 is provided with a first torsion spring 213 for connecting to the first blocking block 21. Once the connecting post 23 is disconnected, the first blocking block 21 will rotate around the first rotating shaft 212 under the elastic force of the first torsion spring 213, so that the first blocking post 211 of the first blocking block 21 will lock the meshing teeth of the first curtain roller 11.

[0039] The first rotating shaft 212 is provided with a first clamp 214 for limiting the position of the first blocking block 21, so as to prevent the first blocking block 21 from detaching from the first rotating shaft 212.

[0040] Similarly, the mounting bracket 1 is provided with a second rotating shaft 222 for hinged to the second blocking block 22. The second blocking block 22 rotates around the second rotating shaft 222. The second rotating shaft 222 is provided with a second torsion spring for connecting to the second blocking block 22. Once the connecting post 23 is disconnected, the second blocking block 22 will rotate around the second rotating shaft 222 under the elastic force of the second torsion spring, so that the second blocking post 221 of the second blocking block 22 locks the meshing teeth of the second curtain roller 12. The second rotating shaft 222 is provided with a second clamp for limiting the position of the second blocking block 22.

[0041] It should be noted that the elastic forces of the first torsion spring 213 and the second torsion spring are in opposite directions.

[0042] Because the blocking part 2 is located between the first curtain roller 11 and the second curtain roller 12, and the first curtain roller 11 and the second curtain roller 12 rotate in the same direction (both clockwise or both counterclockwise), Figure 1 For example, if the blocking part 2 is located to the right of the first curtain roller 11 but to the left of the second curtain roller 12, then in order to stop the two curtain rollers at the same time, the first blocking post 211 and the second blocking post 221 need to be in opposite directions to lock the two curtain rollers.

[0043] Example 2, still as Figures 1 to 2 As shown, this is only one embodiment of the present invention. Based on any of the above embodiments, in the anti-fall structure for a double curtain roller door of the present invention, a tensioning roller 14 for connecting to the transmission chain 131 is further provided between the first curtain roller 11 and the second curtain roller 12; in this way, the tensioning roller 14 is used to adjust the tension of the transmission chain 131.

[0044] Furthermore, the fuse roller 13 is disposed on the side of the second curtain roller 12 away from the first curtain roller 11.

[0045] In fact, a fuse roller mounting plate 132 is provided on the outside of the fuse roller 13. The fuse roller mounting plate 132 will melt at high temperature. Of course, the melting point of the connecting column 23 is lower than the melting point of the fuse roller mounting plate 132.

[0046] Finally, both the first blocking block 21 and the second blocking block 22 are integrally formed parts, and the first blocking block 21 and the second blocking block 22 have high structural strength and good fall protection stability.

[0047] This utility model discloses an anti-fall structure for double-curtain roller doors. A blocking block is set at each of the two curtain rollers. The blocking post of the blocking block can be locked with the gear on the outside of the curtain roller to prevent the door beam from falling. Moreover, the melting point of the connecting post between the two blocking blocks is lower than that of the melting roller. In the event of a fire, the connecting post can break before the melting roller, locking the curtain roller in advance, effectively preventing falls and providing higher safety.

[0048] This utility model is not limited to the specific embodiments described above, and various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A fall-prevention structure for double-curtain roller doors, characterized in that: The device includes a first curtain roller (11), a second curtain roller (12), and a fusible roller (13). The fusible roller (13) is provided with a transmission chain (131) for connecting with the first curtain roller (11) and the second curtain roller (12). A blocking part (2) is provided between the first curtain roller (11) and the second curtain roller (12). The blocking part (2) includes a first blocking block (21), a second blocking block (22), and a connecting post (23) for connecting the first blocking block (21) and the second blocking block (22). The first blocking block (21) is provided with a first blocking post (211) extending in the direction of the first curtain roller (11), and the second blocking block (22) is provided with a second blocking post (221) extending in the direction of the second curtain roller (12). The melting point of the connecting post (23) is lower than the melting point of the fusible roller (13).

2. The anti-falling structure for a double curtain roller door according to claim 1, characterized in that: Includes a mounting frame (1); the first curtain roller (11), the second curtain roller (12) and the fuse roller (13) are all mounted to the mounting frame (1) via mounting bearings.

3. The fall protection structure for a double shutter door of claim 2, wherein: The mounting bracket (1) is provided with a first rotating shaft (212) for hinged to the first blocking block (21), the first blocking block (21) rotates around the first rotating shaft (212), and the first rotating shaft (212) is provided with a first torsion spring (213) for connecting to the first blocking block (21).

4. The fall protection structure for a double shutter door of claim 3, wherein: The first rotating shaft (212) is provided with a first clamp (214) for limiting the position of the first blocking block (21).

5. The fall protection structure for a double shutter door of claim 3, wherein: The mounting bracket (1) is provided with a second rotating shaft (222) for hinged to the second blocking block (22). The second blocking block (22) rotates around the second rotating shaft (222). The second rotating shaft (222) is provided with a second torsion spring for connecting to the second blocking block (22).

6. The fall protection structure for a double shutter door of claim 3, wherein: The elastic forces of the first torsion spring (213) and the second torsion spring are in opposite directions.

7. The fall protection structure for a double shutter door of claim 1, wherein: A tensioning roller (14) for connecting to the transmission chain (131) is also provided between the first curtain roller (11) and the second curtain roller (12).

8. The fall protection structure for a double shutter door of claim 1, wherein: The fusion roller (13) is located on the side of the second curtain roller (12) away from the first curtain roller (11).

9. The fall protection structure for a double shutter door of claim 1, wherein: A fuse roller mounting plate (132) is provided on the outside of the fuse roller (13), and the melting point of the connecting column (23) is lower than the melting point of the fuse roller mounting plate (132).

10. The fall protection structure for a double shutter door of claim 1, wherein: The first blocking block (21) and the second blocking block (22) are both integrally formed parts.

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