Safety device of large roller shutter door

Abstract

The invention discloses a safety device of a large roller shutter door, which comprises a roller shutter door guide rail, the safety device comprises a mounting base and a safety hook, a hinge lug is arranged on the mounting base, one side of the safety hook is a hinge arm, the other side of the safety hook is a limiting arm for limiting a shutter plate of the roller shutter door, and the safety hook is hinged to the hinge lug through the hinge arm. The limiting arm forms a free end rotating around the hinged lug seat, and the limiting arm rotates in the horizontal direction and rotates into or out of the opening side of the roller shutter door guide rail, so that safe limiting of the curtain plate is formed. The device is low in manufacturing cost, easy to maintain and install and suitable for modification of a common roller shutter door, the device can be conveniently welded to the two sides of a guide rail of the roller shutter door, the guide rail of the roller shutter door is shielded by rotating the safety hooks in the device, the lower end of a curtain plate can be supported when the curtain plate slides down, safety insurance is formed, and the safety of the roller shutter door is guaranteed. The device is installed at a proper height.

Description

Technical Field

[0001] The invention relates to the technical field of rolling shutter doors, and in particular to a safety device for a large rolling shutter door. Background Art

[0002] The rolling shutter doors of large warehouses on ships have a large deadweight. After long-term use, the self-locking device is prone to failure. The rolling shutter door is a series of door panels with multiple joints. In a fixed slide, the door rotates up and down around the reel above the door. When the rolling shutter door is open, the self-locking device is not tightened enough, causing the rolling shutter door to fall due to its own weight, which repeatedly threatens the safety of personnel and property.

[0003] At present, the rolling shutter doors on the market are not perfect in terms of door body falling safety protection, and safety accidents caused by door body falling also occur from time to time. Therefore, this patent designs an external safety device, which is welded on the rolling shutter door frame. By rotating the safety hook of this device, the rolling shutter door is supported from the bottom, thereby ensuring the normal opening state of the rolling shutter door. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide a safety device for a large rolling door.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a safety device for a large rolling door, including a rolling door guide rail, and safety devices with the rolling door guide rail as the installation basis are arranged on both sides of the rolling door guide rail, the safety device includes a mounting base and a safety hook, the mounting base is fixedly arranged on the side of the rolling door guide rail and is spaced apart from the floor to form a safety height, a hinged ear seat is arranged on the mounting base, one side of the safety hook is a hinged arm, and the other side is a limit arm for limiting the curtain plate of the rolling door, the safety hook is hingedly arranged on the hinged ear seat through the hinged arm, so that the limit arm forms a free end that rotates around the hinged ear seat, and the limit arm rotates in the horizontal direction, turning into or out of the opening side of the rolling door guide rail to form a safety limit for the curtain plate.

[0006] Furthermore, articulated ear seats are arranged in pairs on the upper and lower sides of the mounting base, and a rotating shaft rod for rotatably connecting with the articulated ear seat is provided at the end of the articulated arm; the safety hook is arranged in an L shape, the limit arm constitutes the long side of L, and the articulated arm constitutes the short side of L, so that the direction of the articulated arm is arranged perpendicular to the limit arm.

[0007] Furthermore, a rubber pad is fixedly provided on the upper side of the limiting arm.

[0008] Furthermore, it also includes a pin-shaped positioning structure, which includes a first pin hole, a second pin hole, and a positioning pin. The first pin hole is arranged on the upper side of the hinged ear seat, and the second pin hole is arranged on the hinged arm. When the positioning pin passes through the first pin hole and the second pin hole, the position of the safety hook is locked. When the safety hook is rotated to the safety limit position of the curtain plate, the position of the first pin hole coincides with the second pin hole.

[0009] Furthermore, it also includes a linkage control structure, which is arranged on the upper side of the safety device and connected thereto. When the curtain plate of the rolling door slides down, the linkage control structure is first triggered to act, and the linkage control structure turns the safety hook from the non-safety position to the safety position.

[0010] Furthermore, a torsion spring is provided between the articulated arm and the articulated ear seat, and the torsion spring is configured to make the safety hook always have a tendency to rotate to the safety position; the safety device also includes a force storage and release mechanism, and when the safety hook rotates to the non-safety position, the torsion spring is charged, and the safety hook is limited to the non-safety position by the force storage and release mechanism; the linkage control structure includes a winding shaft, a transmission chain, and a toggle arm, one end of the transmission chain is connected to the winding shaft, the toggle arm is connected to the winding shaft, the curtain plate is coupled to the toggle arm, the curtain plate drives the toggle arm to rotate, the toggle arm controls the winding shaft to rotate and reel in the transmission chain, and the lower end of the transmission chain is connected to the force storage and release mechanism.

[0011] Furthermore, the force storage and release mechanism includes a first end face ratchet plate and a second end face ratchet plate, the ratchet teeth of the first end face ratchet plate and the second end face ratchet plate are arranged to mesh with each other, the first end face ratchet plate is fixedly set on the upper end of the rotating shaft, and the second end face ratchet plate is configured to be slidably set in the articulated ear seat along the direction of the pin shaft, and the articulated ear seat is provided with an elastic member for pushing the second end face ratchet plate to move relative to the first end face ratchet plate, the second end face ratchet plate is arranged to be circumferentially locked, and the lower end of the transmission chain is connected to the second end face ratchet plate.

[0012] Furthermore, the pin-shaped positioning structure also includes a third pin hole, and the third pin hole is arranged on the hinged ear seat. The safety hook is also provided with a fourth pin hole. When the safety hook is rotated to the non-safety position, the fourth pin hole coincides with the position of the third pin hole, and the safety hook is positioned in the non-safety position through the third pin hole.

[0013] The advantages and beneficial effects of the present invention are as follows: the safety device of a large rolling door of the present invention can be repeatedly used, has low manufacturing cost and simple maintenance, is easy to install, and is suitable for modification of ordinary rolling doors. The device can be conveniently welded to both sides of the guide rails of the rolling door, and the guide rails of the rolling door can be blocked by rotating the safety hook in the device. When the curtain plate slides down, the lower end of the curtain plate can be supported to form a safe insurance, and the device can be installed at a suitable height; an additional linkage control structure can link the sliding of the curtain plate with the safety device to improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a safety device for a large rolling door of the present invention; Figure 2 It is a side schematic diagram of the safety device of the present invention installed in a warehouse; Figure 3 is a top view schematic diagram of the safety device of the present invention in the safety position; Figure 4 It is a top view schematic diagram of the non-safety device in the safety position of the present invention; Figure 5 It is one of the connection diagrams of the linkage control structure and the safety device in the present invention; Figure 6 This is the second schematic diagram of the connection between the linkage control structure and the safety device in the present invention; In the figure: 1. rolling door guide rail; 2. mounting base; 3. safety hook; 4. safety height; 5. floor; 6. hinged ear seat; 7. hinged arm; 8. limit arm; 9. ear seat pin shaft; 10. shaft hole; 11. rotating shaft sleeve; 12. rubber pad; 13. first pin hole; 14. second pin hole; 15. positioning pin; 16. pin-shaped positioning structure; 17. curtain plate; 18. linkage control structure; 19. torsion spring; 20. winding shaft; 21. transmission chain; 22. toggle arm; 23. first end face ratchet disk; 24. second end face ratchet disk; 25. elastic member; 26. third pin hole; 27. fourth pin hole; 28. sliding chamber; 29. ​​bump; 30. slideway. DETAILED DESCRIPTION

[0015] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0016] Embodiment 1: A safety device for a large rolling door, such as Figure 1-4As shown, it includes a rolling door guide rail 1, which is arranged on both sides of the large storehouse door of the ship. The rolling door guide rail 1 stands vertically on the floor 5, and one side of the rolling door guide rail 1 has an opening. The openings of the two rolling door guide rails 1 are arranged opposite to each other, and a track for the lifting and lowering of the curtain plate 17 is formed through the oppositely arranged openings.

[0017] On both sides of the rolling door guide rail 1, there are safety devices based on the rolling door guide rail 1 for installation. Figure 2-4 As shown, the safety device includes a mounting base 2 and a safety hook 3. The mounting base 2 is fixedly arranged on the side of the rolling door guide rail 1 and is spaced apart from the floor 5 to form a safety height 4. It can be understood that the safety device can be set flexibly and can be set at a certain height from the ground as needed, so that the sliding curtain plate 17 can be stopped at the height. Figure 2 As shown, in this embodiment, the safety height 4 is set to 2100mm, which is higher than the height of a human body, so as to prevent the curtain plate 17 from hitting the passing staff when it falls; Figure 3 As shown, the safety hook 3 is rotated into the open side of the rolling door track, so that the guide rail can be blocked. At this time, it is the safety limit position of the curtain plate 17. Therefore, when the curtain plate 17 falls, it falls on the safety hook 3, which blocks the curtain plate 17 and effectively ensures the safety of personnel. Figure 4 As shown, the safety hook 3 is rotated out of the rolling door guide rail 1, so that there is no obstruction inside the guide rail, which facilitates the curtain plate 17 to fall down, so that the warehouse door can be closed, and this is the non-safety position.

[0018] Specifically, Figure 1 As shown, a hinged ear seat 6 is provided on the mounting base 2, and the hinged ear seats 6 are arranged in pairs on the upper and lower sides of the mounting base 2. The two hinged ear seats 6 are arranged at a certain distance to form a mounting distance therebetween, and the mounting distance is matched with the width of the hinged arm 7, so that the hinged arm 7 of the safety hook 3 can be rotatably set on the hinged ear seat 6; one side of the safety hook 3 is the hinged arm 7, and the other side is the limit arm 8 for limiting the curtain plate 17 of the rolling door. The safety hook 3 is hingedly set on the hinged ear seat 6 through the hinged arm 7, so that the limit arm 8 forms a free end rotating around the hinged ear seat 6, and the limit arm 8 rotates in the horizontal direction, turning into or out of the opening side of the rolling door guide rail 1, forming a safety limit for the curtain plate 17. In this embodiment, the safety hook 3 is generally L-shaped, the limiting arm 8 is longer and constitutes the long side of the L, and the hinged arm 7 is slightly shorter and constitutes the short side of the L, so that the direction of the hinged arm 7 is generally perpendicular to the limiting arm 8. The length of the limiting arm 8 should be such that when the safety hook 3 is rotated to the safety limiting position, the limiting arm 8 can cover the opening of the rolling door guide rail 1, so that the curtain plate 17 can fall on the limiting arm 8 when it falls.

[0019] like Figure 1As shown, in this embodiment, an ear seat pin shaft 9 is provided through the hinge ear seat 6, and an axis hole 10 is provided on the hinge arm 7. A rotating shaft sleeve 11 is provided in the axis hole 10, and the pin shaft is inserted into the rotating shaft sleeve 11 to allow the safety hook 3 to rotate freely; during assembly, the two ends of the axis hole 10 are respectively installed in the T-shaped rotating shaft sleeve 11, and then the end of the hinge arm 7 is installed between the two hinge ear seats 6, and the two holes of the hinge ear seat 6 are aligned with the holes of the rotating shaft sleeve 11, and then the ear seat pin shaft 9 is inserted and locked with a nut. Through the setting of the rotating shaft sleeve 11, not only can the safety hook 3 rotate freely on the mounting base 2, but also the safety hook 3 can have a strong axial and circumferential load, so as to facilitate the safety positioning of the rolling door. Furthermore, a rubber pad 12 is fixedly provided on the upper side of the limit arm 8. In order to cushion the curtain plate 17 when it slides on the limit arm 8 and reduce the loud impact sound caused by the collision, a rubber pad 12 installed by a self-tapping screw is provided, which can greatly reduce the damage to the curtain plate 17 caused by the impact and reduce the noise.

[0020] Due to the provision of the rotating shaft sleeve 11, the safety hook 3 has a large degree of flexibility. When used on a ship, it is inevitable that the safety hook 3 rotates away from the safety position due to fluctuations and vibrations of the hull. When the safety hook 3 needs to be positioned in the safety position, this degree of freedom easily causes the limit arm 8 to leave the opening of the rolling door guide rail 1, thereby losing the safety effect; as an improvement, it also includes a pin-shaped positioning structure 16, specifically, as Figure 1 , 3 As shown, it includes a first pin hole 13, a second pin hole 14, and a positioning pin 15. The first pin hole 13 is set on the upper hinge ear seat 6, and the second pin hole 14 is set on the hinge arm 7. When the positioning pin 15 passes through the first pin hole 13 and the second pin hole 14, the position of the safety hook 3 is locked. When the safety hook 3 is rotated to the safety limit position of the curtain plate 17, the position of the first pin hole 13 and the second pin hole 14 coincide. When in use, when the rolling door is raised and the safety device needs to be placed in the safety position, the safety hook 3 can be rotated to make the limit arm 8 snap into the opening side of the guide rail, and the first pin hole 13 and the second pin hole 14 are aligned, and then the positioning pin 15 is inserted, so that the safety hook 3 and the mounting base 2 form a whole, so when the ship shakes or vibrates again, the safety hook 3 will not be out of position.

[0021] Embodiment 2: In the above-mentioned embodiment, the safety hook 3 needs to be manually switched to the safety limit position to achieve the effect of preventing the curtain plate 17 from sliding off. However, in actual use, it is easy to forget to adjust the position of the safety hook 3. As an optimization improvement, the present embodiment also includes a linkage control structure 18, such as Figure 5 , 6As shown, the linkage control structure 18 is arranged on the upper side of the safety device and connected thereto. When the curtain plate 17 of the rolling door slides down, the linkage control structure 18 is first triggered to move, and the linkage control structure 18 turns the safety hook 3 from the non-safety position to the safety position. In specific use, when the curtain plate 17 slides down, its falling kinetic energy will drive the linkage control structure 18, and then control the safety hook 3 to move downward, that is, during the sliding process, the limit arm 8 will automatically snap into the opening of the rolling door guide rail 1, so that before the curtain plate 17 falls to the height position of the safety device, the safety hook 3 will automatically block at the opening of the guide rail.

[0022] Specifically, Figure 5 As shown, in this embodiment, a rotating shaft rod for rotationally connecting with the hinged ear seat 6 is provided at the end of the articulated arm 7; the rotating shaft rod is connected to the safety hook 3 as a whole, and when the safety hook 3 rotates, it will also control the rotating shaft rod to rotate. Therefore, in this embodiment, bearings can be provided on the two articulated ear seats 6, so that the rotating shaft rod passes through the bearing arrangement, so as to realize the free rotation of the safety hook 3 and have sufficient bearing capacity. Furthermore, a torsion spring 19 is provided between the articulated arm 7 and the articulated ear seat 6, and the torsion spring 19 is configured to make the safety hook 3 always have a tendency to rotate to the safety position; therefore, in the free state, the torsion spring 19 drives the safety hook 3 to rotate to the position of closing the opening, as shown in FIG. Figure 3 Position shown; The safety device also includes a force storage and release mechanism. When the safety hook 3 rotates to the non-safety position, the torsion spring 19 is charged, and the force storage and release mechanism limits the safety hook 3 to the non-safety position; specifically, Figure 5 , 6 As shown, the force storage and release mechanism includes a first end face ratchet disc 23 and a second end face ratchet disc 24. The ratchets of the first end face ratchet disc 23 and the second end face ratchet disc 24 are meshed with each other. It can be understood that the first end face ratchet disc 23 is fixedly arranged on the upper end of the rotating shaft, and the first end face ratchet disc 23 can rotate with the safety hook 3. The second end face ratchet disc 24 is configured to be slidably arranged in the hinged ear seat 6 along the direction of the pin shaft, and the second end face ratchet disc 24 is configured to be circumferentially locked. In specific implementation, it can be as follows Figure 5 As shown, a cylindrical cavity is provided on the upper hinged ear seat 6 to form a sliding chamber 28 for the second end face ratchet disc 24 to move up and down. Since the second end face ratchet disc 24 needs to limit circumferential rotation, a protrusion 29 is provided around the second end face ratchet disc 24, and a slideway 30 matching with the protrusion 29 is provided axially in the sliding chamber 28. The protrusion 29 is placed in the slideway 30, so that the second end face ratchet disc 24 can only move up and down. Further, an elastic member 25 for pushing the second end face ratchet disc 24 to move toward the first end face ratchet disc 23 is provided on the hinged ear seat 6, and the lower end of the transmission chain 21 is connected to the second end face ratchet disc 24.

[0023] The control method of the force storage and release mechanism during actual use is that when storing force, specifically, the safety hook 3 is rotated to the non-safety position. At this time, the second end face ratchet disk 24 is pushed down by the elastic member 25 to engage and position the first end face ratchet disk 23, that is, the position of the safety hook 3 is positioned so that it is maintained in the non-safety position. Since the internal torsion spring 19 is in the force storage state at this time, it is now in the force storage state of the safety hook 3; when the safety hook 3 needs to be triggered to act and rotate to the safety position, it is only necessary to raise the second end face ratchet disk 24 to release its positioning on the first end face ratchet disk 23. After disengaging from the positioning, under the action of the torsion spring 19, the limit arm 8 is rotated to block the opening.

[0024] It is further necessary to use the linkage control structure 18 in combination with the safety device. Specifically, the linkage control structure 18 includes a winding shaft 20, a transmission chain 21, and a toggle arm 22. One end of the transmission chain 21 is connected to the winding shaft 20. The transmission chain 21 is a non-stretchable wire rope or chain. The toggle arm 22 is connected to the winding shaft 20. The curtain plate 17 is coupled to the toggle arm 22. Figure 6 As shown, when the rolling door is opened, under the action of the elastic member 25, the winding shaft 20 is pulled by the transmission chain 21, and the wave arm cross bar is at the opening. The curtain plate 17 drives the toggle arm 22 to rotate, and the toggle arm 22 controls the winding shaft 20 to rotate and retract the transmission chain 21. The lower end of the transmission chain 21 is connected to the power storage and release mechanism. Therefore, when the curtain plate 17 slides, the wave arm can be rotated to rotate the winding shaft 20. At this time, the transmission chain 21 can be wound and shortened, and then the second end face ratchet disk 24 can be pulled up, thereby releasing the limit on the first end face ratchet disk 23, so that the safety hook 3 can be released. During the sliding process, the safety hook 3 can be released instantly. Before the curtain plate 17 falls to the safety height 4, the safety hook 3 is automatically in place.

[0025] Furthermore, the pin-shaped positioning structure 16 further includes a third pin hole 26, which is disposed on the hinged ear seat 6, and a fourth pin hole 27 is further disposed on the safety hook 3. When the safety hook 3 is rotated to the non-safety position, the fourth pin hole 27 coincides with the third pin hole 26, and the safety hook 3 is positioned in the non-safety position through the third pin hole 26. Figure 4 As shown, in this embodiment, by setting the third pin hole 26 and the fourth pin hole 27, the principle is the same as that of the first and second pin holes in the above-mentioned embodiments, and the safety hook 3 can be positioned in the non-safety position.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A safety device for a large rolling door, comprising a rolling door guide rail (1), characterized in that: A safety device is provided on both sides of the rolling door guide rail (1) with the rolling door guide rail (1) as a mounting base, the safety device comprising a mounting base (2) and a safety hook (3), the mounting base (2) being fixedly arranged on the side of the rolling door guide rail (1) and being spaced apart from the floor (5) to form a safety height (4), a hinged ear seat (6) being provided on the mounting base (2), a hinged arm (7) being provided on one side of the safety hook (3), and a limit arm (8) being provided on the other side to limit the position of a curtain plate (17) of the rolling door, the safety hook (3) being hingedly arranged on the hinged ear seat (6) through the hinged arm (7), so that the limit arm (8) forms a free end that rotates around the hinged ear seat (6), and the limit arm (8) rotates in a horizontal direction to rotate into or out of the opening side of the rolling door guide rail (1), thereby forming a safety limit for the curtain plate (17).

2. A safety device for a large rolling door according to claim 1, characterized in that: The mounting base (2) is provided with articulated ear seats (6) in pairs on the upper and lower sides, and the end of the articulated arm (7) is provided with a rotating shaft rod for being rotatably connected to the articulated ear seat (6); the safety hook (3) is arranged in an L shape, the limit arm (8) constitutes the long side of the L, and the articulated arm (7) constitutes the short side of the L, so that the direction of the articulated arm (7) is arranged perpendicular to the limit arm (8).

3. A safety device for a large rolling door according to claim 2, characterized in that: A rubber pad (12) is fixedly provided on the upper side of the limiting arm (8).

4. A safety device for a large rolling door according to claim 2, characterized in that: It also includes a pin-shaped positioning structure (16), which includes a first pin hole (13), a second pin hole (14), and a positioning pin (15); the first pin hole (13) is arranged on the upper hinge ear seat (6); the second pin hole (14) is arranged on the hinge arm (7); when the positioning pin (15) passes through the first pin hole (13) and the second pin hole (14), the position of the safety hook (3) is locked; when the safety hook (3) is rotated to the safety limit position of the curtain plate (17), the position of the first pin hole (13) and the second pin hole (14) coincide.

5. A safety device for a large rolling door according to claim 2, characterized in that: The invention also comprises a linkage control structure (18), which is arranged on the upper side of the safety device and connected thereto. When the curtain plate (17) of the rolling door slides down, the linkage control structure (18) is first triggered to act, and the linkage control structure (18) turns the safety hook (3) from a non-safety position to a safety position.

6. A safety device for a large rolling door according to claim 5, characterized in that: A torsion spring (19) is provided between the articulated arm (7) and the articulated ear seat (6), and the torsion spring (19) is configured to make the safety hook (3) always have a tendency to rotate to the safety position; the safety device also includes a power storage and release mechanism, when the safety hook (3) rotates to the non-safety position, the torsion spring (19) is charged, and the power storage and release mechanism limits the safety hook (3) to the non-safety position; the linkage control structure (18) includes a winding shaft (20), a transmission chain (21), and a toggle arm (22), one end of the transmission chain (21) is connected to the winding shaft (20), the toggle arm (22) is connected to the winding shaft (20), the curtain plate (17) is coupled to the toggle arm (22), the curtain plate (17) drives the toggle arm (22) to rotate, the toggle arm (22) controls the winding shaft (20) to rotate and retracts the transmission chain (21), and the lower end of the transmission chain (21) is connected to the power storage and release mechanism.

7. A safety device for a large rolling door according to claim 6, characterized in that: The force storage and release mechanism comprises a first end face ratchet disc (23) and a second end face ratchet disc (24), the ratchet teeth of the first end face ratchet disc (23) and the second end face ratchet disc (24) being arranged to mesh with each other, the first end face ratchet disc (23) being fixedly arranged at the upper end of the rotating shaft, the second end face ratchet disc (24) being configured to be slidably arranged in the hinged ear seat (6) along the direction of the pin shaft, the hinged ear seat (6) being provided with an elastic member (25) for pushing the second end face ratchet disc (24) to move relative to the first end face ratchet disc (23), the second end face ratchet disc (24) being arranged to be circumferentially locked, and the lower end of the transmission chain (21) being connected to the second end face ratchet disc (24).

8. A safety device for a large rolling door according to claim 4, characterized in that: The pin-shaped positioning structure (16) further comprises a third pin hole (26), wherein the third pin hole (26) is arranged on the hinged ear seat (6), and the safety hook (3) is further provided with a fourth pin hole (27). When the safety hook (3) is rotated to a non-safety position, the fourth pin hole (27) coincides with the third pin hole (26), and the safety hook (3) is positioned in the non-safety position through the third pin hole (26).

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