CN115898243A - Chain breakage-proof structure of duplex rolling shutter door - Google Patents

Abstract

The invention provides a chain breakage-proof structure of a duplex rolling door, which relates to the technical field of electric rolling doors and comprises a first chain wheel, a second chain wheel, a driving chain used for being connected with the first chain wheel and the second chain wheel and a braking part arranged between the first chain wheel and the second chain wheel, wherein the braking part comprises a middle shaft, a torsion spring connected with the middle shaft, a rotating wing arranged on the middle shaft and an extending arm arranged on the rotating wing, one end of the extending arm far away from the rotating wing is provided with a roller used for being connected with the inner side of the driving chain, and two ends of the rotating wing are respectively provided with clamping tips used for being meshed with the first chain wheel and the second chain wheel. The double-rolling door anti-falling device is simple in structure, the braking part is arranged between the two rolling door shafts, the two rolling door shafts can be clamped when rotating, so that the two door bodies can be braked and prevented from falling simultaneously, the rotating force of the two rolling door shafts can be utilized to balance the two sides of the braking part, the double-rolling door with larger total mass can be effectively prevented from falling, and the safety is higher.

Description

Chain breakage-proof structure of duplex rolling shutter door

Technical Field

The invention relates to the technical field of electric rolling doors, in particular to a chain breakage prevention structure of a duplex rolling door.

Background

The roller shutter door is characterized in that a plurality of movable door sheets are connected in series, a scroll above the door rotates an upper door and a lower door in a fixed slideway, the roller shutter door is widely applied to shops, subways, banks and business supermarkets, the general rule of the places is that the pedestrian traffic is large, and once the roller shutter door falls down, pedestrians can be injured probably by the roller shutter door.

Most roller shutter doors are driven by a motor through a chain to rotate a roller shutter shaft, and the roller shutter shaft winds and unwinds a roller shutter door body to complete the lifting of the roller shutter door; the motor of the roller shutter door is generally provided with a brake device, but the brake device only can stop the motor, and once the chain is broken, the roller shutter door body still can fall down to hurt people even if the brake device stops the motor.

Therefore, a device which can directly act on the roller shutter door body and is used for braking and stopping the roller shutter door from falling when a chain is broken is urgently needed, for example, the invention patent CN109779509A of China discloses an anti-falling device for the roller shutter door, which is mainly used for preventing the roller shutter door from falling to hurt people, has simple structure, can prevent the roller shutter door from falling in various states, and is safe and reliable in protection; it is composed of a pair of stop devices and a trigger device; the working principle is as follows: when the door curtain of the roller shutter door rises and stops, the electromagnets A and B of the pair of stopping devices are powered off at the same time, the spring elastically extends, and drives the piston and the stopping plates to move towards the inner surfaces of the U-shaped bottom plates of the left and right door curtain sliding sleeves respectively and to prop against the inner surfaces of the U-shaped bottom plates, and at the moment, the pair of stopping devices can prevent the door curtain from falling despite the unhooking, breaking or other abnormal conditions of the chain wheel of the driving device of the door curtain; when the door curtain of the rolling door descends, if the door curtain suddenly falls down due to some reason, the triggering device triggers the electromagnetic switch to act, the power supply of the electromagnet A and the electromagnet B of the pair of stopping devices is cut off, and the left stopping plate and the right stopping plate respectively support against the inner surface of the U-shaped bottom plate to prevent the door curtain from falling down.

But along with the change of user's demand, because the protection nature of pair rolling slats door two-layer roll-type door is better promptly, the use of double-layer roll-type door at present stage is more and more extensive, and a motor drives two rolling slats door axles simultaneously through the chain and rotates in the double-layer roll-type door, drives two rolling slats door bodies and goes up and down simultaneously, when adopting above-mentioned rolling slats door anti-falling device, still exists following shortcoming: the double-unit rolling door is provided with two door bodies, and the total weight of the double-unit rolling door is large, so that the rolling door is difficult to brake in a friction stopping way; and two door bodies are difficult to brake simultaneously and stop falling, so that the safety of pedestrians below cannot be effectively protected.

Therefore, in order to solve the above problems, it is necessary to design a reasonable and efficient duplex roller shutter door chain anti-breaking structure.

Disclosure of Invention

The invention aims to provide a duplex rolling door with a simple structure, wherein a braking part is arranged between two rolling door shafts, so that the two rolling door shafts can be clamped by rotating at the same time, the two door bodies can be braked and prevented from falling at the same time, and the rotating force of the two rolling door shafts can be utilized to balance the two sides of the braking part, so that the duplex rolling door with larger total mass can be effectively prevented from falling, and the safety is higher.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

a chain breakage-preventing structure of a duplex rolling door comprises a first chain wheel, a second chain wheel, a driving chain and a braking part, wherein the driving chain is used for being connected with the first chain wheel and the second chain wheel, the braking part is arranged between the first chain wheel and the second chain wheel, the braking part comprises a center shaft, a torsion spring connected with the center shaft, a rotating wing arranged on the center shaft and a stretching arm arranged on the rotating wing, one end, far away from the rotating wing, of the stretching arm is provided with a roller wheel used for being connected with the inner side of the driving chain, and two ends of the rotating wing are respectively provided with clamping points used for being meshed with the first chain wheel and the second chain wheel;

when the driving chain works normally, the driving chain presses one end of the extending arm far away from the rotating wing;

and when the drive chain breaks, the one end that stretches out the arm and keep away from the rotor wing loses pressure the rotor wing rotates under the effect of torsional spring, the card point block extremely first sprocket and second sprocket.

Preferably, the drive chain is connected to a drive motor.

Preferably, the chain wheel device further comprises a mounting plate for mounting the first chain wheel and the second chain wheel, and one end, far away from the middle shaft, of the torsion spring is connected with the mounting plate.

Preferably, the mounting plate is provided with a tension wheel for connecting with the driving chain.

Preferably, a base is arranged on one side, close to the mounting plate, of the tensioning wheel, and a sliding groove for facilitating sliding of the base is formed in the mounting plate.

Preferably, the sliding groove extends in a direction perpendicular to a line connecting the first sprocket and the second sprocket.

Preferably, an elastic washer is arranged outside the roller.

Preferably, the tip portion of the card is arranged in an arc shape.

Preferably, one side of the rotating wing, which is far away from the mounting plate, is provided with a limiting hoop used for being connected with the middle shaft.

Preferably, the first sprocket and the second sprocket have the same size.

The invention discloses a chain breakage-proof structure of a duplex rolling door, which has the beneficial effects that: simple structure sets up the braking piece in the middle of two rolling door axles, not only can rotate two rolling door axles simultaneously and block to stop to weigh down to two door bodies simultaneously, can also utilize the pivoted power of two rolling door axles, balance the braking piece both sides, make can effectively prevent weighing down to the great pair rolling slats door of total mass, the security is higher.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of an anti-breaking structure for a duplex rolling door chain according to the present invention;

FIG. 2 is a schematic structural diagram of a duplex rolling door chain anti-breaking structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of a braking member of an embodiment of the chain breakage preventing structure for a duplex rolling door of the present invention;

in the figure: 1. the device comprises a first chain wheel, a second chain wheel, a driving chain, a driving motor, a braking part, a central shaft, a middle shaft, a torsion spring, a 43, a rotating wing, a 431, a clamping tip, a 432, a limiting hoop, a 44, an extending arm, a 441, a roller, a 442, an elastic washer, a 5, a mounting plate, a 51, a base, a 52 and a tensioning wheel.

Detailed Description

The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.

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

Meanwhile, it should be understood that the flows in the drawings are not merely performed individually for convenience of description, but a plurality of steps are performed alternately with each other.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and systems known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

The first embodiment is as follows: as shown in fig. 1 to 3, which are only one embodiment of the present invention, a chain breakage preventing structure for a duplex rolling door comprises a first chain wheel 1, a second chain wheel 2, a driving chain 3 for connecting with the first chain wheel 1 and the second chain wheel 2, and a braking member 4 disposed between the first chain wheel 1 and the second chain wheel 2, wherein the braking member 4 comprises a central shaft 41, a torsion spring 42 connected with the central shaft 41, a rotating wing 43 disposed on the central shaft 41, and a protruding arm 44 disposed on the rotating wing 43, one end of the protruding arm 44 away from the rotating wing 43 is provided with a roller 441 for connecting with the inner side of the driving chain 3, and two ends of the rotating wing 43 are respectively provided with a locking tip 431 for engaging with the first chain wheel 1 and the second chain wheel 2;

in the invention, a first chain wheel 1 is coaxially and fixedly connected with a first rolling door shaft, and a first rolling door is wound on the first rolling door shaft; the second chain wheel 2 is coaxially and fixedly connected with a second rolling door shaft, and the second rolling door is wound on the second rolling door shaft; drive chain 3 simultaneously with first sprocket 1 and second sprocket 2 carry out the chain meshing to be connected with the transmission motion for when drive chain 3 rotated, drive first sprocket 1 and second sprocket 2 and rotate, thereby accomplish two rolling slats doors and go up and down, go upward or down promptly.

Here, two rolling door shafts are arranged in parallel, and the first chain wheel 1 and the second chain wheel 2 are positioned on the same plane, so that the formed duplex rolling door has better lifting stability.

In use, the driving chain 3 is connected with a driving motor 31, and the driving motor 31 is a stepless speed change motor, so that the driving chain 3 can rotate forwards or backwards, and the rotating speed can be adjusted, thereby completing the up-and-down movement of the roller shutter door at different speeds.

Once the driving chain 3 is broken, the first chain wheel 1 and the second chain wheel 2 are out of limit, and the roller shutter door can fall down to hurt people; in order to prevent the risk of breakage of the drive chain 3, a stopper 4 is provided between the first sprocket 1 and the second sprocket 2 in the present invention.

In order to prevent the first sprocket 1 and the second sprocket 2 from interfering with each other, generally, a certain gap is formed between the first sprocket 1 and the second sprocket 2, and the braking member 4 is disposed in the gap, and it is coincidental that the driving chain 3 passes around the outside of the first sprocket 1 and the second sprocket 2 to form a surrounding space, and then the braking member 4 is disposed in the surrounding space of the driving chain 3.

The braking member 4 includes a central shaft 41, a torsion spring 42 connected to the central shaft 41, a rotating wing 43 disposed on the central shaft 41, and a protruding arm 44 disposed on the rotating wing 43.

Specifically, the middle shaft 41 is disposed between the first chain wheel 1 and the second chain wheel 2, the middle shaft 41 is connected to the mounting plate 5 through the torsion spring 42, that is, the middle shaft 41 can rotate against the elastic force of the torsion spring 42, the rotating wing 43 is disposed coaxially with the middle shaft 41, two ends of the rotating wing 43 are respectively provided with the locking tips 431 for meshing with the first chain wheel 1 and the second chain wheel 2, and the distance between the ends of the two locking tips 431 is greater than the distance between the first chain wheel 1 and the second chain wheel 2.

A roller 441 for connecting with the inner side of the driving chain 3 is arranged at one end of the extending arm 44 away from the rotating wing 43, and the length of the extending arm 44 is greater than the distance between the rotating wing 43 and the driving chain 3; when the driving chain 3 is normally operated, the driving chain 3 presses the end of the protruding arm 44 away from the rotating wing 43, and the protruding arm 44 is inclined in one direction, so that the entire braking member 4 is rotated against the elastic force of the torsion spring 42; in this state, the two catching tips 431 are not engaged with the first sprocket 1 and the second sprocket 2;

when the driving chain 3 is broken, the end, far away from the rotating wing 43, of the extending arm 44 loses pressure, the rotating wing 43 rotates under the action of the torsion spring 41, and the clamping tip 431 is clamped to the first chain wheel 1 and the second chain wheel 2 to brake the rotation of the first chain wheel 1 and the second chain wheel 2.

Thus, once the driving chain 3 between the driving motor 31 and the rolling door shaft is broken, the braking member 4 automatically blocks the first chain wheel 1 and the second chain wheel 2, and the rolling door will not fall down to hurt people.

The chain breakage-proof structure of the duplex rolling door is simple in structure, the braking part is arranged between the two rolling door shafts, the two rolling door shafts can be clamped by rotating at the same time, so that the two door bodies can be braked and prevented from falling at the same time, the rotating force of the two rolling door shafts can be utilized to balance the two sides of the braking part, the duplex rolling door with larger total mass can be effectively prevented from falling, and the safety is higher.

The second embodiment is also shown in fig. 1 to 3, which is only one embodiment of the present invention, and on the basis of the first embodiment, the chain breakage preventing structure for the duplex rolling door of the present invention further includes a mounting plate 5 for mounting the first sprocket 1 and the second sprocket 2, and one end of the torsion spring 42 away from the central shaft 41 is fixedly connected to the mounting plate 5.

And, be provided with on the mounting panel 5 and be used for with tight pulley 52 that rises that drive chain 3 is connected for drive chain 3 is the tight state of rising all the time with being connected of first sprocket 1 and second sprocket 2, in order to prevent that drive chain 3 is not hard up to lead to losing the pressure to cantilever arm 44, thereby prevents that arresting member 4 from rotating the card of unusual dead first sprocket 1 and second sprocket 2.

Further, one side of the tension pulley 52 close to the mounting plate 5 is provided with a base 51, the mounting plate 5 is provided with a chute for facilitating the sliding of the base 51, and the extending direction of the chute is perpendicular to the connecting line of the first chain wheel 1 and the second chain wheel 2.

The position of the tension wheel 52 can be properly adjusted to ensure the stable transmission of the driving chain 3, and the base 51 is locked on the sliding chute after the adjustment is finished.

Preferably, the driving motor 31 is disposed on a side of the first sprocket 1 away from the second sprocket 2, or the driving motor 31 is disposed on a side of the second sprocket 2 away from the first sprocket 1, such that two segments of the driving chains 3 are disposed between the first sprocket 1 and the second sprocket 2 in parallel, the extending arm 44 extends to abut against an inner side of one segment of the driving chains 3, the tension wheel 52 is disposed at another segment of the driving chains 3, and preferably, the tension wheel 52 is disposed on an outer side of the driving chains 3, so as to prevent the tension wheel 52 and the base 51 from interfering with the braking member 4.

Third embodiment, as shown in fig. 1 to 3, which is only one embodiment of the present invention, based on any one of the above embodiments, in the chain breakage preventing structure for a duplex rolling door according to the present invention, the first sprocket 1 and the second sprocket 2 have the same specification, so that the two rolling doors synchronously move up and down at the same speed.

It should be noted that the end of the bayonet 431 is arc-shaped; the reason is that when the driving chain 3 is broken, the roller shutter door falls down by gravity, the rotation direction of the first sprocket 1 and the second sprocket 2 is determined, and the arc-shaped arrangement of the locking tip 431 is to lock the rotation of the first sprocket 1 and the second sprocket 2 in the one direction.

Taking fig. 2 as an example, when the rolling shutter door falls down under the action of gravity, the first sprocket 1 and the second sprocket 2 rotate clockwise, and at this time, the braking member 4 rotates clockwise against the elastic force of the torsion spring 42, and once the extending arm 44 loses pressure, the braking member 4 rotates counterclockwise under the elastic force of the torsion spring 42, and the arc at the end of the clamping tip 431 is bent counterclockwise, so that when the clamping tip 431 and the first sprocket 1 and the second sprocket 2 are used, the first sprocket 1 and the second sprocket 2 can be more effectively clamped, and the first sprocket 1 and the second sprocket 2 are prevented from continuing to rotate clockwise.

Of course, the locking tip 431 has no locking effect on the counterclockwise rotating direction of the first sprocket 1 and the second sprocket 2, but the counterclockwise rotating of the first sprocket 1 and the second sprocket 2 causes the roller door to be lifted without harming pedestrians under the roller door.

After the driving chain 3 is broken and the locking tip 431 locks the first sprocket 1 and the second sprocket 2, the serviceman can freely rotate the first sprocket 1 and the second sprocket 2 counterclockwise to lift the shutter door.

Also, an elastic washer 442 is disposed outside the roller 441 to prevent the roller 441 from wearing the driving chain 3.

Finally, a limiting hoop 432 used for being connected with the central shaft 41 is arranged on one side of the rotating wing 43 away from the mounting plate 5, so as to prevent the rotating wing 43 and the central shaft 41 from falling off.

The chain breakage-proof structure of the duplex rolling door is simple in structure, the braking part is arranged between the two rolling door shafts, the two rolling door shafts can be clamped by rotating at the same time, so that the two door bodies can be braked and prevented from falling at the same time, the rotating force of the two rolling door shafts can be utilized to balance the two sides of the braking part, the duplex rolling door with larger total mass can be effectively prevented from falling, and the safety is higher.

The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides a pair rolling slats door chain prevents disconnected structure which characterized in that: the brake device comprises a first chain wheel (1), a second chain wheel (2), a driving chain (3) and a brake part (4), wherein the driving chain (3) is used for being connected with the first chain wheel (1) and the second chain wheel (2), the brake part (4) is arranged between the first chain wheel (1) and the second chain wheel (2), the brake part comprises a middle shaft (41), a torsion spring (42) connected with the middle shaft (41), a rotating wing (43) arranged on the middle shaft (41) and an extending arm (44) arranged on the rotating wing (43), one end, far away from the rotating wing (43), of the extending arm (44) is provided with a roller (441) used for being connected with the inner side of the driving chain (3), and two ends of the rotating wing (43) are respectively provided with clamping tips (431) used for being meshed with the first chain wheel (1) and the second chain wheel (2);

so that when the driving chain (3) works normally, the driving chain (3) presses one end of the protruding arm (44) far away from the rotating wing (43);

and when drive chain (3) fracture, the one end that cantilever arm (44) kept away from change wing (43) loses pressure, change wing (43) and rotate under the effect of torsional spring (41), card point (431) are blocked to first sprocket (1) and second sprocket (2).

2. The chain breakage preventing structure for the duplex roller shutter door as claimed in claim 1, wherein: the driving chain (3) is connected with a driving motor (31).

3. The chain breakage preventing structure of the duplex rolling door according to claim 1, wherein: the chain wheel mechanism is characterized by further comprising a mounting plate (5) used for mounting the first chain wheel (1) and the second chain wheel (2), wherein one end, far away from the middle shaft (41), of the torsion spring (42) is connected with the mounting plate (5).

4. The chain breakage preventing structure of the duplex rolling door according to claim 3, wherein: and a tension wheel (52) connected with the driving chain (3) is arranged on the mounting plate (5).

5. The chain breakage preventing structure of the duplex rolling door according to claim 4, wherein: one side that tight pulley (52) are close to mounting panel (5) is provided with base (51), be provided with on mounting panel (5) and be used for the convenience base (51) gliding spout.

6. The chain breakage preventing structure of the duplex rolling door according to claim 5, wherein: the extending direction of the sliding groove is perpendicular to the connecting line of the first chain wheel (1) and the second chain wheel (2).

7. The chain breakage preventing structure of the duplex rolling door according to claim 1, wherein: and an elastic gasket (442) is arranged on the outer side of the roller (441).

8. The chain breakage preventing structure for the duplex roller shutter door as claimed in claim 1, wherein: the end part of the clamping tip (431) is arranged in an arc shape.

9. The chain breakage preventing structure of the duplex rolling door according to claim 3, wherein: and a limiting hoop (432) used for being connected with the middle shaft (41) is arranged on one side, away from the mounting plate (5), of the rotating wing (43).

10. The chain breakage preventing structure for the duplex roller shutter door as claimed in claim 1, wherein: the first chain wheel (1) and the second chain wheel (2) are identical in specification.

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