Anti-falling device for overhead door

Abstract

The utility model relates to the technical field of overhead doors, in particular to an anti-falling device for an overhead door, which comprises a winder, a driving wire wheel and a driven wire wheel are arranged in the winder in parallel, the driving wire wheel is matched with the winder through a central shaft, and the driven wire wheel is sleeved on the central shaft through a hollow shaft; a hollow transmission hub is arranged on the side, corresponding to the driving line wheel, of the driven line wheel, and the center shaft is provided with a centrifugal friction flail block corresponding to the transmission hub. A transmission belt is wound on the driving wire wheel, the free end of the transmission belt is connected with the top of the sliding block, and a trigger rope is wound on the driven wire wheel; the locking device is fixedly arranged on the outer side of the longitudinal sliding groove, and a pop-up lock head penetrating through the longitudinal sliding groove is arranged in the locking device; the top of the popping lock head is provided with a shifting groove, the top of the locking device is provided with a driving shifting rod corresponding to the shifting groove, and the top end of the driving shifting rod is provided with a wire clamp connected with the trigger rope. According to the utility model, the conventional shaft transmission is replaced by the lighter trigger rope, so that the structure is more flexible and reliable, and the loss caused by a door falling accident is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of overhead door, specifically relates to a kind of anti-falling device for overhead door. BACKGROUND

[0002] In the manufacturing and processing of automobile lift and intelligent garage, it is necessary to install overhead door. At present, the overhead door in automobile lift and intelligent garage is driven by motor to drive winding wheel to pull rope upward, and then the overhead door is opened or closed under the traction of rope.

[0003] Industrial workshop automatic overhead door, more vehicles and personnel enter and exit, and the door is frequently used with high frequency. During the lifting process of electric door or when it stays at the top of door, due to workshop vibration, machine wear and tear, motor brake failure, door shaft fracture or steel wire rope fracture, etc. The door may fall, damage the entering and exiting vehicles, which is very dangerous.

[0004] In the existing anti-falling device, a lock is usually arranged in the middle of slide rail, and the kinetic energy of centrifugal mechanism is transmitted by shaft transmission to trigger the lock. Since this structure belongs to single-point protection, once the height of person or vehicle is higher than the lock, the protection effect cannot be achieved, which causes certain damage to the person or object under the door. If the lock is set too high, the shaft transmission has large moment of inertia, which requires sufficient torque to drive, so that the lock is difficult to be triggered. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of anti-falling device for overhead door, which replaces the traditional shaft transmission with a lighter trigger rope, making the structure more flexible and reliable, and effectively reducing the loss caused by falling door accidents.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a kind of anti-falling device for overhead door, the overhead door includes a pair of longitudinally arranged longitudinal slide groove, a door plate, the bottom of the door plate is equipped with the sliding block matched with two longitudinal slide grooves respectively;It includes: winder, the driving line wheel and driven line wheel are arranged in parallel in the winder, the driving line wheel is matched with the winder by center shaft, the driven line wheel is set on the center shaft by hollow shaft sleeve;The side of the driven line wheel corresponding the driving line wheel is equipped with hollow transmission hub, the center shaft is equipped with centrifugal friction flinger corresponding the transmission hub;Driving line wheel is wound with transmission belt, the free end of transmission belt is connected with the top of sliding block, the driven line wheel is wound with trigger rope, and the winding direction of trigger rope is opposite to the direction of transmission belt;Locking device, the locking device is fixedly arranged outside the longitudinal slide groove, and the locking device is equipped with the ejection lock head penetrating the longitudinal slide groove, the ejection lock head is equipped with return tension spring between the inside of the locking device;The top of the ejection lock head is equipped with the slot, the top of the locking device is equipped with the drive lever corresponding the slot, the bottom end of the drive lever is equipped with the handle matched with the slot, the top end is equipped with wire clamp, the middle part is connected with the locking device by shaft support, and the wire clamp is connected with the trigger rope.

[0007] Preferably, the center shaft is provided with a return spring, and the outer end of the return spring is connected with the inside of the winder for the return winding of the driving line wheel.

[0008] Preferably, the locking device is arranged in multiple and arranged along the height direction of the longitudinal slide groove, and each wire clamp is connected with the trigger rope.

[0009] Preferably, the drive lever includes a driving arm, the wire clamp is arranged at the top end of the driving arm, and the bottom end of the driving arm is matched with the shaft support through the shaft sleeve;It further includes a swing arm, the top end of the swing arm is matched with the shaft sleeve through the sleeve, and the handle is arranged at the bottom end of the swing arm;The outer part of the sleeve is provided with a torsional spring, and the two ends of the torsional spring are matched with the driving arm and the swing arm respectively.

[0010] Preferably, the top of the free end of the ejection lock head is provided with a groove, and the sliding block is provided with a plug corresponding to the groove.

[0011] The utility model has the advantages that when the door plate suddenly falls due to mechanical failure, the wire wheel is rapidly pulled by the transmission belt and rotates at high speed, the centrifugal friction flinger is thrown off and generates friction force with the inner wall of the transmission hub, the torque of the central shaft is transmitted to the transmission hub, the driven wire wheel rotates and pulls the trigger rope under the power transmission of the hollow shaft, the trigger rope is pulled out, the pop-up lock head is pulled out to the inner side of the vertical sliding groove under the action of the driving lever, the sliding block is blocked from falling further, the purpose of safety protection is achieved, the out-of-control falling door plate is limited by the pop-up lock head, and personnel or vehicles are prevented from being injured by the falling door plate. The structure is replaced by the traditional shaft transmission by the light trigger rope, the structure is more flexible and reliable, and the loss caused by the falling door accident is effectively reduced. The plurality of lockers work together, so that the pop-up lock head is pulled out at the first time when the failure occurs, the door plate is blocked at the highest position, the loss caused by the door plate failure is reduced, and the safety is further improved. When the driving arm is pulled up, the swing arm drives the slot to make the pop-up lock head pop up, when the door plate suddenly falls in the middle of falling, the pop-up lock head at the top is blocked by the door plate and cannot be effectively pulled out, at this time, the driving arm overcomes the elastic force of the torsional spring, ensures that the trigger rope can be effectively pulled up, so that the driving lever at the bottom normally plays a role. When the pop-up lock head blocks and restricts the sliding block, the plug positions and locks the pop-up lock head through the groove, prevents the pop-up lock head from retracting and causing the locking and protection function to fail. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained by those skilled in the art without any creative effort.

[0013] Figure 1 It is the whole structure schematic diagram of the present utility model;

[0014] Figure 2 It is the winding device structure schematic diagram of the present utility model;

[0015] Figure 3 It is the locker structure schematic diagram of the present utility model.

[0016] In the drawing: 1, vertical sliding groove;2, door plate;3, sliding block;4, winding device;5, driving wire wheel;6, driven wire wheel;7, central shaft;8, hollow shaft;9, transmission hub;10, centrifugal friction flinger;11, transmission belt;12, trigger rope;13, locker;14, pop-up lock head;15, slot;16, driving lever;17, lever head;18, wire clamp;19, shaft support;20, return coil spring;21, driving arm;22, swing arm;23, torsional spring;24, groove;25, plug;26, return tension spring. DETAILED DESCRIPTION

[0017] The technical solutions of the utility model will be described clearly and completely below in combination with the drawings of the utility model. Obviously, the described embodiments are only some of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] According to Figure 1 、 Figure 2 、 Figure 3 As shown in FIG. 1, a kind of anti-falling device for lifting door, the lifting door includes a pair of longitudinally arranged longitudinal sliding groove 1, a door plate 2, the bottom of the door plate 2 is equipped with the sliding block 3 respectively with two longitudinal sliding groove 1 cooperation;It includes: winder 4, the driving line wheel 5 and driven line wheel 6 are arranged in parallel in the winder 4, the driving line wheel 5 is cooperated with the winder 4 by center shaft 7, the driven line wheel 6 is set on the center shaft 7 by hollow shaft 8;The hollow transmission hub 9 of driving line wheel 5 side corresponding to the driven line wheel 6 is equipped, the center shaft 7 is equipped with centrifugal friction block 10 corresponding to the transmission hub 9;Driving line wheel 5 is wound with transmission belt 11, the free end of transmission belt 11 is connected with the top of sliding block 3, driven line wheel 6 is wound with trigger rope 12, the winding direction of trigger rope 12 is opposite to the direction of transmission belt 11;Locking device 13, the locking device 13 is fixedly arranged on the outer side of longitudinal sliding groove 1, and the locking device 13 is equipped with the ejection lock head 14 that is penetrated through longitudinal sliding groove 1, the ejection lock head 14 is equipped with return tension spring 26 between locking device 13 interior;The top of ejection lock head 14 is equipped with the push slot 15, the top of locking device 13 is equipped with driving push rod 16 corresponding to the push slot 15, the bottom end of driving push rod 16 is equipped with the push head 17 that is cooperated with the push slot 15, top end is equipped with wire clamp 18, middle part is connected with locking device 13 by shaft support 19, wire clamp 18 is connected with trigger rope 12. Wherein, the center shaft 7 is equipped with return coil spring 20, the outer end of return coil spring 20 is connected with the interior of winder 4, for the return of driving line wheel 5.

[0019] By the above arrangement, the slider 3 slowly moves up and down in the longitudinal sliding groove 1 during the lifting and lowering of the door panel 2, the return spring 20 applies a return force to the drive wire wheel 5, and the drive wire wheel 5 slowly rotates by itself under the action of the transmission belt 11. During the rotation of the drive wire wheel 5, the centrifugal friction block 10 does not come into contact with the inner wall of the transmission hub 9 due to the low rotation speed, and cannot transmit torque through friction. When the door panel 2 suddenly falls due to mechanical failure, the wire wheel is quickly pulled by the transmission belt 11 to rotate at high speed, the centrifugal friction block 10 is thrown away, and friction is generated between the centrifugal friction block 10 and the inner wall of the transmission hub 9, so that the torque of the central shaft 7 is transmitted to the transmission hub 9, and the driven wire wheel 6 rotates and pulls the trigger rope 12 under the power transmission action of the hollow shaft 8. When the trigger rope 12 is pulled, the drive lever 16 is pulled to pop out the lock head 14 to the inside of the longitudinal sliding groove 1, and block the continuous falling of the slider 3, so as to achieve the purpose of safety protection. The door panel 2 falling out of control is limited by the pop-up lock head 14 to avoid injuring people or vehicles.

[0020] As a preferred solution, the lock 13 is arranged in multiple and arranged along the height direction of the longitudinal sliding groove 1, and each wire clamp 18 is connected with the trigger rope 12.

[0021] In this arrangement, multiple locks 13 work together to pop out the pop-up lock head 14 at the first time of failure, so as to block the door panel 2 at the highest position and reduce the loss caused by the failure of the door panel 2, further improving the safety.

[0022] The drive lever 16 includes a drive arm 21, the wire clamp 18 is arranged at the top end of the drive arm 21, and the bottom end of the drive arm 21 is matched with the shaft support 19 through a shaft sleeve; it also includes a swing arm 22, the top end of the swing arm 22 is matched with the shaft sleeve, and the lever head 17 is arranged at the bottom end of the swing arm 22; the sleeve is provided with a torsional spring 23 outside, and the two ends of the torsional spring 23 are matched with the drive arm 21 and the swing arm 22 respectively.

[0023] In this arrangement, the torsional spring 23 is used to transmit torque, when the drive arm 21 is pulled up, the swing arm 22 is pulled to make the pop-up lock head 14 pop out, and when the door panel 2 suddenly falls during the descent, the top pop-up lock head 14 is blocked by the door panel 2 and cannot be effectively popped out, at this time the drive arm 21 overcomes the elastic force of the torsional spring 23 to ensure that the trigger rope 12 can be effectively pulled up, so that the bottom drive lever 16 can normally function.

[0024] The top of the free end of the pop-up lock head 14 is provided with a groove 24, and the slider 3 is provided with a plug 25 corresponding to the groove 24.

[0025] Through the setting, when the ejector lock head 14 blocks and restricts the slider 3, the plug 25 positions and locks the ejector lock head 14 through the groove 24, so that the lock protection function is not invalidated due to the retraction of the ejector lock head 14.

[0026] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A falling prevention device for a lifting door, the lifting door comprising a pair of longitudinally arranged longitudinal sliding grooves (1) and a door panel (2), the door panel (2) being provided at the bottom with sliding blocks (3) respectively matched with the two longitudinal sliding grooves (1); characterized in that, It includes: The winding device (4) is provided with a driving line wheel (5) and a driven line wheel (6) in parallel inside the winding device (4), the driving line wheel (5) is matched with the winding device (4) through a center shaft (7), the driven line wheel (6) is sleeved on the center shaft (7) through a hollow shaft (8); The hollow transmission hub (9) is arranged on one side of the driven line wheel (6) corresponding to the driving line wheel (5), the center shaft (7) is provided with a centrifugal friction block (10) corresponding to the transmission hub (9); The driving line wheel (5) is wound with a transmission belt (11), the free end of the transmission belt (11) is connected with the top of the sliding block (3), the driven line wheel (6) is wound with a trigger rope (12), and the winding direction of the trigger rope (12) is opposite to the direction of the transmission belt (11); The lock (13) is fixedly arranged outside the longitudinal sliding groove (1), and the lock (13) is provided with a pop-up lock head (14) penetrating through the longitudinal sliding groove (1), the pop-up lock head (14) is provided with a return tension spring (26) between the inside of the lock (13); The top of the pop-up lock head (14) is provided with a push groove (15), the top of the lock (13) is provided with a driving push rod (16) corresponding to the push groove (15), the bottom end of the driving push rod (16) is provided with a push head (17) matched with the push groove (15), the top end is provided with a wire clamp (18), the middle part is connected with the lock (13) through a shaft support (19), and the wire clamp (18) is connected with the trigger rope (12).

2. The anti-falling device for a lift door according to claim 1, characterized in that: The center shaft (7) is provided with a return coil spring (20), the outer end of the return coil spring (20) is connected with the inside of the winding device (4), and the return coil spring (20) is used for the return winding of the driving line wheel (5).

3. The anti-falling device for a lift door according to claim 1, characterized in that: The lock (13) is provided in plurality and arranged along the height direction of the longitudinal sliding groove (1), and each wire clamp (18) is connected with the trigger rope (12) respectively.

4. The anti-falling device for a lift door according to claim 1, characterized by: The driving push rod (16) includes a driving arm (21), the wire clamp (18) is arranged at the top end of the driving arm (21), and the bottom end of the driving arm (21) is matched with the shaft support (19) through a shaft sleeve; It also includes a swing arm (22), the swing arm (22) is matched with the shaft sleeve through a sleeve, and the push head (17) is arranged at the bottom end of the swing arm (22); The outside of the sleeve is provided with a torsional spring (23), and the two ends of the torsional spring (23) are matched with the driving arm (21) and the swing arm (22) respectively.

5. The anti-falling device for a lift door according to claim 1, characterized in that: The top of the free end of the pop-up lock head (14) is provided with a recess (24), and the sliding block (3) is provided with a plug (25) corresponding to the recess (24).

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