CN214298846U - Protective switch capable of preventing handrail chain from breaking - Google Patents

Abstract

The utility model relates to an automatic staircase control technology field, in particular to can prevent cracked protection switch of handrail chain, including two pivots, the cover is equipped with two driving sprocket in the arbitrary pivot, the cover is equipped with two handrail sprocket and handrail area friction pulley in another pivot, driving sprocket and handrail sprocket pass through handrail chain transmission and connect formation main handrail driving wheel group and reserve handrail driving wheel group, be connected through the fastening regulating part between main handrail driving wheel group and the pivot, reserve handrail driving wheel group, handrail area friction pulley and pivot fixed connection, be equipped with chain round pin induction system between main handrail driving wheel group and the reserve handrail driving wheel group, chain round pin induction system is connected with the fastening regulating part electricity. Compared with the prior art, the utility model discloses a common drive handrail system of main handrail driving wheel group and reserve handrail driving wheel group avoids causing ladder way system and handrail system to fall the swift current out of control because of the chain fracture, has guaranteed the personnel's of taking safety, plays and prevents suffering from in the effect in advance, improves the security performance.

Description

Protective switch capable of preventing handrail chain from breaking

Technical Field

The utility model relates to an automatic staircase control technology field, in particular to can prevent cracked protection switch of handrail chain.

Background

The escalator is a common personnel transportation tool in daily life, and is used in various fields of department stores, supermarkets, office buildings, hotels, airports, subways and urban traffic. Among the prior art, the staircase includes: the escalator comprises steps, step wheels, chain wheels, chains, steel rails, upper guide rails, lower guide rails, additional brakes, operation driving devices and trusses, wherein the trusses are installed in installation grooves where the escalators are installed, the steel rails, the upper guide rails and the lower guide rails are installed on the trusses and are parallel to each other, the steel rails are used for supporting the chain wheels, all the chain wheels are installed on the chains, the triangular steps are installed below each step, the chain wheels and the step wheels are installed on the steps, guiding of the step wheels is used for guiding rotation of the steps, so that all the steps can form a step shape or a plate, the chains are in a ring shape, the operation driving devices are installed at two ends of the chains and are used for driving the chains to move back and forth, safety accidents can occur after the chains break, and certain safety devices are needed for stopping the operation of the escalator in time, the existing safety device has the disadvantages of complex structure, low running stability, failure possibility due to frequent non-use, low controllability, short service life and increased use risk of the escalator.

SUMMERY OF THE UTILITY MODEL

To the not enough with above-mentioned background art, the utility model provides a can prevent cracked protection switch of handrail chain.

The utility model adopts the technical scheme as follows: a protection switch capable of preventing a handrail chain from being broken is characterized in that: the handrail driving device comprises two rotating shafts, wherein two driving chain wheels are sleeved on any one rotating shaft, two handrail chain wheels and a handrail belt friction wheel are sleeved on the other rotating shaft, the driving chain wheels and the handrail chain wheels are connected through handrail chain transmission to form a main handrail driving wheel set and a standby handrail driving wheel set, the main handrail driving wheel set is connected with the rotating shaft through a fastening adjusting piece, the standby handrail driving wheel set and the handrail belt friction wheel are fixedly connected with the rotating shafts, a chain pin sensing device is arranged between the main handrail driving wheel set and the standby handrail driving wheel set, and the chain pin sensing device is electrically connected with the fastening adjusting piece;

the chain pin sensing device comprises a mounting seat and two photoelectric sensors arranged on the mounting seat, the output ends of the two photoelectric sensors are arranged right opposite to the chain pins of the two handrail chains, and the photoelectric sensors are electrically connected with the fastening adjusting piece.

Preferably, the fastening adjusting part comprises two annular seats which are respectively sleeved on the two rotating shafts, the outer annular surface of each annular seat is fixedly connected with the corresponding driving chain wheel and the corresponding handrail chain wheel, a plurality of grooves are formed in the inner annular surface of each annular seat, metal abutting blocks are movably inserted in the grooves, a plurality of clamping grooves are formed in the outer peripheral surface of each rotating shaft, electromagnets are arranged in the clamping grooves, and the electromagnets are electrically connected with the photoelectric sensors.

Preferably, the rotating shaft sleeved with the driving chain wheel is fixedly connected with an output shaft of a motor, and the motor is electrically connected with the photoelectric sensor.

Preferably, the mounting seat is an E-shaped mounting seat, the handrail chain passes through a groove of the E-shaped mounting seat, and the photoelectric sensor comprises a light emitter and a light receiver, which are mounted on a groove wall of the E-shaped mounting seat in a face-to-face manner.

Preferably, the photoelectric sensor is an infrared photoelectric sensor.

Preferably, the photosensor is a visible photosensor.

Preferably, the photosensor is a diffusion reflection type photoelectric switch.

Has the advantages that: compared with the prior art, the utility model provides a pair of can prevent cracked protection switch of handrail chain, moreover, the steam generator is simple in structure, the controllability is strong, through the common drive handrail system of main handrail drive wheelset and reserve handrail drive wheelset, at the long-time operation in-process of staircase, the handrail chain round pin of main handrail drive wheelset can slowly drop because of the friction action, detect handrail chain round pin and break away from when photoelectric sensor, the controller starts reserve handrail drive wheelset, avoid causing ladder road system and handrail system functioning speed to mismatch because of the chain fracture, thereby lead to the personnel focus shakiness of taking and fall down, personnel's safety has been guaranteed, play and prevent suffering from and the effect in advance, the security performance is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the structure of the handrail chain of fig. 1 after it is detached;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a sectional view B-B of fig. 3.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Example 1

As shown in fig. 1-4, a protection switch capable of preventing a handrail chain from breaking includes two rotating shafts 1, wherein two driving sprockets 2 are sleeved on any one of the rotating shafts 1, two handrail sprockets 3 and a handrail belt friction wheel 4 are sleeved on the other rotating shaft 1, the handrail belt friction wheel 4 is connected with a handrail belt a, the driving sprockets 2 and the handrail sprockets 3 are in transmission connection through a handrail chain 5 to form a main handrail driving wheel set and a standby handrail driving wheel set, the main handrail driving wheel set is connected with the rotating shaft 1 through a fastening adjusting member 6, the standby handrail driving wheel set and the handrail belt friction wheel 4 are fixedly connected with the rotating shaft 1, a chain pin sensing device 7 is arranged between the main handrail driving wheel set and the standby handrail driving wheel set, and the chain pin sensing device 7 is electrically connected with the fastening adjusting member 6; the chain pin sensing device 7 comprises a mounting seat 71, the mounting seat 71 is an E-shaped mounting seat and two photoelectric sensors 72 arranged on the mounting seat 71, the photoelectric sensors 72 are infrared photoelectric sensors, the handrail chains 5 pass through grooves of the E-shaped mounting seat, each photoelectric sensor 72 comprises a light emitter and a light receiver, the light emitters and the light receivers are arranged on the groove wall of the E-shaped mounting seat in a face-to-face manner, the transmitting ends of the two light emitters are arranged opposite to the chain pins of the two handrail chains 5, the fastening adjusting piece 6 comprises two annular seats 61 respectively sleeved on the two rotating shafts 1, the outer annular surface of each annular seat 61 is fixedly connected with the corresponding driving chain wheel 2 and the corresponding handrail chain wheel 3, a plurality of grooves 62 are formed in the inner annular surface of each annular seat 61, and metal abutting blocks 63 are movably inserted in the grooves 62, the outer peripheral surface of the rotating shaft 1 is provided with a plurality of clamping grooves 11, the clamping grooves 11 are internally provided with electromagnets 64, and the photoelectric sensor 72 is electrically connected with the electromagnets 64.

In the staircase operation process, motor drive moves with pivot fixed connection's handrail driving wheel group, thereby drive the handrail operation, the in-process of round trip movement between host computer gear and drive gear of handrail chain, the handrail chain passes through in the recess of E type mount pad all the time, chain round pin when photoelectric sensor detects the handrail chain drops, the controller starts the electro-magnet, metal butt piece and draw-in groove joint, thereby the reserve handrail driving wheel group operation of motor drive, avoid causing ladder way system and handrail system to fall the swift current out of control because of the chain fracture, guarantee to take the security.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and that those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims (6)

1. A protection switch capable of preventing a handrail chain from being broken is characterized in that: the handrail driving device comprises two rotating shafts (1), wherein two driving chain wheels (2) are sleeved on any one of the rotating shafts (1), two handrail chain wheels (3) and a handrail belt friction wheel (4) are sleeved on the other rotating shaft (1), the driving chain wheels (2) and the handrail chain wheels (3) are in transmission connection through a handrail chain (5) to form a main handrail driving wheel set and a standby handrail driving wheel set, the main handrail driving wheel set is connected with the rotating shaft (1) through a fastening adjusting piece (6), the standby handrail driving wheel set and the handrail belt friction wheel (4) are fixedly connected with the rotating shaft (1), a chain pin sensing device (7) is arranged between the main handrail driving wheel set and the standby handrail driving wheel set, and the chain pin sensing device (7) is electrically connected with the fastening adjusting piece (6);

the chain pin sensing device (7) comprises a mounting seat (71), two photoelectric sensors (72) and a controller, wherein the two photoelectric sensors (72) are arranged on the mounting seat (71), the output ends of the two photoelectric sensors (72) are opposite to the chain pins of the two handrail chains (5), and the photoelectric sensors (72) and the controller are electrically connected with the fastening adjusting piece (6).

2. The protection switch capable of preventing the breakage of the handrail chain according to claim 1, wherein: the fastening adjusting piece (6) comprises two annular seats (61) which are respectively sleeved on the two rotating shafts (1), the outer annular surface of each annular seat (61) is fixedly connected with the corresponding driving chain wheel (2) and the corresponding handrail chain wheel (3), a plurality of grooves (62) are formed in the inner annular surface of each annular seat (61), metal abutting blocks (63) are movably inserted in the grooves (62), a plurality of clamping grooves (11) are formed in the outer peripheral surface of each rotating shaft (1), electromagnets (64) are arranged in the clamping grooves (11), and the electromagnets (64) are electrically connected with the photoelectric sensors (72).

3. A protection switch capable of preventing breakage of a handrail chain according to claim 1 or 2, wherein: the installation seat (71) is an E-shaped installation seat, the handrail chain (5) passes through a groove of the E-shaped installation seat, the photoelectric sensor (72) comprises a light emitter and a light receiver, and the light emitter and the light receiver are installed on the groove wall of the E-shaped installation seat in a face-to-face mode.

4. The protection switch capable of preventing the breakage of the handrail chain according to claim 2, wherein: the photoelectric sensor (72) is an infrared photoelectric sensor.

5. The protection switch capable of preventing the breakage of the handrail chain according to claim 2, wherein: the photoelectric sensor (72) is a visible light photoelectric sensor.

6. The protection switch capable of preventing the breakage of the handrail chain according to claim 1, wherein: the photoelectric sensor (72) is a diffusion reflection type photoelectric switch.

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