Wind-resistant roller shutter door limiter

Abstract

The utility model provides a wind-resistant roller shutter door limiter which comprises a guide shaft and a mechanical limiting block, the guide shaft extends along a guide rail of a roller shutter door, the mechanical limiting block is fixed on the guide shaft through a bolt, the mechanical limiting block comprises a clamping part extending horizontally and a mounting part perpendicular to the clamping part, a bolt hole is formed in the mounting part, and the mechanical limiting block is fixed on the guide shaft through the bolt hole. The bolts are connected with the preset mounting positions of the guide shafts, and when the roller shutter door sheet runs to the completely-opened position, the clamping parts abut against the curtain sheet bottom beam angle steel to limit the curtain sheet to continue to move upwards. According to the wind-resistant roller shutter door limiting stopper, when a motor limiting stopper loses efficacy or is manually operated, the mechanical limiting block directly and physically blocks a curtain piece from ascending, the top rushing accident is avoided, the contact face of the clamping part and the bottom beam angle steel is designed, it is ensured that the limiting action is accurately triggered, the guide shaft serves as a fixing base, the wind-resistant roller shutter door limiting stopper is matched with roller shutter door guide rails of different specifications, and universality is high.

Description

Technical Field

[0001] This utility model belongs to the field of roller shutter door technology, specifically relating to a wind-resistant roller shutter door limiter. Background Technology

[0002] In the construction, warehousing, and industrial sectors, wind-resistant roller shutters are widely used due to their windproof, anti-theft, and rapid opening and closing characteristics. However, existing opening and closing control technologies for wind-resistant roller shutters still have significant safety hazards, mainly concentrated in the following two aspects: When the roller shutter needs to be manually operated due to a power outage, inexperienced operators may over-pull the chain, causing the curtain to completely roll into the roller shaft (i.e., "over-rolling"). The rigid collision between the curtain and the roller shaft can easily cause curtain deformation, breakage, or even damage to the motor transmission mechanism, resulting in high maintenance costs. In addition, in extreme cases, curtain fragments may fall from a height, threatening the safety of personnel on site. Existing roller shutters typically rely on electronic limit switches built into the motor to control the opening and closing position. However, electronic limit switches are susceptible to failure due to circuit aging, signal interference, or mechanical wear. Once the limit switch fails, the motor will continue to drive the curtain upwards until the bottom beam angle steel of the curtain violently impacts the roller shaft, causing the curtain to twist, the guide rail to deform, and the motor to overload and burn out. Utility Model Content

[0003] The main purpose of this utility model is to provide a wind-resistant roller shutter door limiter. The structure of this wind-resistant roller shutter door limiter provides a simple, highly adaptable mechanical limit device that is independent of the power system. It provides dual protection in case of electronic limit failure or manual operation, fundamentally preventing roller shutter door overshooting accidents.

[0004] To achieve the above objectives, this utility model provides a wind-resistant roller shutter door limiter, which includes a guide shaft and a mechanical limit block. The guide shaft extends along the roller shutter door guide rail, and the mechanical limit block is fixed to the guide shaft by bolts. The mechanical limit block includes a horizontally extending snap-fit ​​portion and a mounting portion perpendicular to the snap-fit ​​portion. The mounting portion is provided with bolt holes and is connected to a preset mounting position of the guide shaft by bolts. When the roller shutter door slats move to the fully open position, the snap-fit ​​portion abuts against the bottom beam angle steel of the slats, restricting the slats from continuing to move upward.

[0005] This utility model provides a wind-resistant roller shutter door limiter. A guide shaft extends along the roller shutter door guide rail, and a mechanical limit block is fixed to the guide shaft with bolts. The mechanical limit block includes a horizontal locking part and a vertical mounting part, connected to the guide shaft by bolts. The locking part abuts against the bottom beam angle steel of the curtain slat, restricting the curtain slat from continuing to move upwards. In case of motor limiter failure or manual operation, the mechanical limit block directly and physically blocks the curtain slat from moving upwards, preventing overshooting. The contact surface design between the locking part and the bottom beam angle steel ensures accurate triggering of the limit action. The guide shaft serves as a fixed base, adaptable to different specifications of roller shutter door guide rails, offering strong versatility.

[0006] In one possible implementation, the mechanical limiting block is formed by laser cutting and bending a 3mm thick steel plate, with the locking part and mounting part of the mechanical limiting block forming an L-shaped cross-section structure. The 3mm steel plate provides sufficient bending strength to withstand the impact load of the curtain slats, and the L-shaped cross-section optimizes the mechanical distribution, avoiding deformation or breakage caused by stress concentration.

[0007] In one possible implementation, the bolts are in two sets, symmetrically inserted into the bolt holes of the mounting portion, and fixed in place with the threaded holes on the side wall of the guide shaft. The symmetrical bolt arrangement distributes the fixing stress, preventing loosening caused by single-point force. The double bolts tighten and enhance the connection rigidity between the mechanical limit block and the guide shaft, preventing wobbling.

[0008] In one possible implementation, the mechanical limiting block is installed in the upper region of the guide shaft, and the horizontal length of its locking portion is greater than the lateral width of the bottom beam angle steel of the slat. This extra-wide locking portion design ensures that the bottom beam angle steel of the slat is effectively blocked under any lateral displacement.

[0009] In one possible implementation, the end of the bottom beam angle steel of the curtain slat has a groove corresponding to the locking part. When the curtain slat reaches the fully open position, the locking part is embedded in the groove to form a mechanical lock. This solution avoids the risk of misalignment when the locking part contacts the plane of the bottom beam angle steel. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a wind-resistant roller shutter door limiter provided by this utility model;

[0011] Figure 2 This utility model provides a wind-resistant roller shutter door limiter that is installed on... Detailed Implementation

[0012] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0013] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0014] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0015] See attached diagram. Figure 1 and Figure 2 As shown in the figure, this utility model provides a wind-resistant roller shutter door limiter including a guide shaft 1 and a mechanical limit block 2. The guide shaft 1 extends along the roller shutter door guide rail, and the mechanical limit block 2 is fixed to the guide shaft 1 by bolts. The mechanical limit block 2 includes a horizontally extending snap-fit ​​part 21 and a mounting part 22 perpendicular to the snap-fit ​​part 21. The mounting part 22 is provided with bolt holes 3 and is connected to the preset mounting position of the guide shaft 1 by bolts. When the roller shutter door slats move to the fully open position, the snap-fit ​​part 21 abuts against the bottom beam angle steel 4 of the slats, restricting the slats from continuing to move upward.

[0016] The wind-resistant roller shutter door limiter provided by this utility model has a guide shaft 1 extending along the roller shutter door guide rail. A mechanical limit block 2 is fixed to the guide shaft 1 by bolts. The mechanical limit block 2 includes a horizontal locking part 21 and a vertical mounting part 22, which are connected to the guide shaft 1 by bolts. The locking part 21 abuts against the bottom beam angle steel 4 of the curtain slat, restricting the curtain slat from continuing to move upward. In the event of motor limiter failure or manual operation, the mechanical limit block 2 directly and physically blocks the curtain slat from moving upward, avoiding a top-rush accident. The contact surface design between the locking part 21 and the bottom beam angle steel ensures accurate triggering of the limit action. The guide shaft 1 serves as a fixed base, adaptable to different specifications of roller shutter door guide rails, and has strong versatility.

[0017] In one possible implementation, the mechanical limiting block 2 is formed by laser cutting and bending a 3mm thick steel plate. The snap-fit ​​portion 21 and the mounting portion 22 of the mechanical limiting block 2 form an L-shaped cross-section structure. The 3mm steel plate provides sufficient bending strength to withstand the impact load of the curtain slats, and the L-shaped cross-section optimizes the mechanical distribution, avoiding deformation or breakage caused by stress concentration.

[0018] In one possible implementation, the bolts are in two sets, symmetrically inserted into the bolt holes 3 of the mounting part 22, and fixed in conjunction with the threaded holes on the side wall of the guide shaft 1. The symmetrical bolt layout disperses the fixing stress, preventing loosening caused by single-point force, and the double bolt locking enhances the connection rigidity between the mechanical limit block 2 and the guide shaft 1, preventing wobbling.

[0019] In one possible implementation, the mechanical limiting block 2 is installed in the upper region of the guide shaft 1, and the horizontal length of its locking portion 21 is greater than the lateral width of the bottom beam angle steel 4 of the slat. The extra-wide design of the locking portion 21 ensures that the bottom beam angle steel 4 of the slat can be effectively blocked under any lateral displacement.

[0020] In one possible implementation, the end of the bottom beam angle steel 4 of the curtain slat is provided with a groove 5 corresponding to the locking part 21. When the curtain slat reaches the fully open position, the locking part 21 is embedded in the groove 5 to form a mechanical lock. This solution avoids the risk of misalignment when the locking part 21 contacts the plane of the bottom beam angle steel.

[0021] It is worth mentioning that those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wind roller door stopper, characterized in that, The utility model relates to a mechanical limiting block for roller shutter door, which comprises a guide shaft and a mechanical limiting block, the guide shaft is arranged along the roller shutter door guide rail, and the mechanical limiting block is fixed on the guide shaft by bolts, the mechanical limiting block comprises a horizontally extending clamping part and a mounting part perpendicular to the clamping part, the mounting part is provided with bolt holes, and the bolt holes are connected with the preset mounting position of the guide shaft by bolts, when the curtain piece of the roller shutter door runs to the fully opened position, the clamping part abuts against the curtain piece bottom beam angle steel to limit the curtain piece to continue to go up.

2. The wind roller door check of claim 1, wherein, The mechanical limiting block is formed by laser cutting and bending a 3mm thick steel plate, and the clamping part and the mounting part of the mechanical limiting block form an L-shaped cross-section structure.

3. The wind roller door check of claim 2, wherein, The bolts are two groups, symmetrically arranged in the bolt holes of the mounting part, and cooperatively fixed with the threaded holes of the side wall of the guide shaft.

4. The wind roller door check of claim 3, wherein, The mechanical limiting block is installed in the upper region of the guide shaft, and the horizontal length of the clamping part is greater than the transverse width of the curtain piece bottom beam angle steel.

5. The wind roller door check of claim 4, wherein, The end of the curtain piece bottom beam angle steel is provided with a groove corresponding to the clamping part, and when the curtain piece reaches the fully opened position, the clamping part is embedded in the groove to form a mechanical lock.

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