WO2020054065A1

WO2020054065A1 - Emergency braking device for passenger conveyor

Info

Publication number: WO2020054065A1
Application number: PCT/JP2018/034245
Authority: WO
Inventors: 貴紀横井
Original assignee: 三菱電機株式会社
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2020-03-19
Also published as: JP6949240B2; CN112654577B; CN112654577A; JPWO2020054065A1

Abstract

The present invention provides an emergency braking device for an escalator, whereby the braking force applied to a main shaft when a ratchet pawl comes in contact with teeth can be further increased as the main shaft rotates relative to the teeth, and the structure of the ratchet pawl can be simplified. This emergency braking device for an escalator is provided with a ratchet wheel provided to a main shaft, the ratchet wheel having a wheel body, a boss fixed to the main shaft, and a rotation braking part for braking rotation of the boss relative to the wheel body, the rotation braking part having a friction member which is provided to the wheel body and which contacts the side surface of the boss, and the friction member being disposed so that the area of the side surface of the boss that is contacted by the friction member increases as the boss rotates relative to the wheel body.

Description

Emergency braking system for passenger conveyor

The present invention relates to an emergency braking device for a passenger conveyor having a ratchet wheel.

Conventionally, there has been known an emergency braking device for an escalator including a ratchet wheel provided on a main shaft and a ratchet pole for preventing rotation of the ratchet wheel. The ratchet wheel is provided in the gap between the four annular disks provided in order with a gap in the radial direction about the main shaft and the disks radially adjacent to each other, and is adjacent to each other in the radial direction. A friction member for generating a frictional force between the disks. The disk disposed radially inward of the four disks is fixed to the main shaft. A plurality of teeth to which a ratchet pole contacts are formed on a disk arranged at the outermost side in the radial direction among the four disks. The braking force acting on the main shaft when the ratchet pole hits a tooth becomes larger as the main shaft rotates with respect to the tooth (for example, see Patent Document 1).

JP 2013-227117 A

However, the emergency braking device of the escalator described in Patent Document 1 has a problem that the structure of the ratchet wheel is complicated.

The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a braking force acting on a main shaft when a ratchet pole hits a tooth, as the main shaft rotates with respect to the tooth. It is an object of the present invention to provide a passenger conveyor emergency braking device which can be made larger and can simplify the structure of a ratchet wheel.

An emergency braking device for a passenger conveyor according to the present invention includes a ratchet wheel provided on a main shaft and a ratchet pole for preventing rotation of the ratchet wheel, and the ratchet wheel has a plurality of teeth formed on an outer peripheral portion thereof. And a boss fixed to the main shaft, and a rotation braking unit that brakes the rotation of the boss with respect to the wheel body. The rotation braking unit is provided on one of the wheel body and the boss, and the other of the wheel body and the boss. The friction member is arranged such that as the boss rotates with respect to the wheel body in the rotation direction of the ratchet wheel, the area of the other side contacting the friction member increases. Have been.

According to the emergency braking device for a passenger conveyor according to the present invention, as the boss rotates with respect to the wheel body in the rotation direction of the ratchet wheel, the friction member has an area on the other side that comes into contact with the friction member. Is located. This makes it possible to increase the braking force acting on the main shaft when the ratchet pole hits the teeth as the main shaft rotates with respect to the teeth, and to simplify the structure of the ratchet wheel.

FIG. 2 is a side view showing the escalator according to Embodiment 1 of the present invention. It is an enlarged view which shows the principal part of the escalator of FIG. It is an enlarged view which shows the A section of FIG. It is an enlarged view which shows the B section of FIG. It is an enlarged view which shows the C section of FIG.

Embodiment 1 FIG.
FIG. 1 is a side view showing an escalator according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view showing a main part of the escalator of FIG. An escalator, which is a passenger conveyor, includes a main frame 1 provided over an upper floor and a lower floor, a motor 2 provided on the main frame 1, and a deceleration to which the power of the motor 2 is transmitted. And a drive sprocket 4 to which the power of the motor 2 is transmitted via the speed reducer 3. The motor 2, the speed reducer 3, and the drive sprocket 4 are arranged on the upper floor horizontal portion of the main frame 1. When the power of the motor 2 is transmitted to the driving sprocket 4, the driving sprocket 4 rotates.

The escalator includes a drive chain 5 wound around the drive sprocket 4, a main sprocket 6 wound around the drive chain 5, and a main shaft 7 fixed to the main sprocket 6. The drive chain 5, the main sprocket 6, and the main shaft 7 are arranged on a horizontal portion on the upper floor side of the main frame 1. The rotation of the drive sprocket 4 causes the drive chain 5 to circulate. As the drive chain 5 circulates, the main sprocket 6 rotates. When the main sprocket 6 rotates, the main shaft 7 rotates.

The escalator includes a ratchet wheel 8 fixed to the main shaft 7 and an upper step sprocket 9 fixed to the main shaft 7. The ratchet wheel 8 and the upper step sprocket 9 are arranged on a horizontal portion on the upper floor side of the main frame 1. The escalator also includes a step chain 10 wound around the upper step sprocket 9 and circulating, and a lower step sprocket 11 around which the step chain 10 is wound. The lower step sprocket 11 is arranged on a lower horizontal portion of the main frame 1. As the main shaft 7 rotates, the upper step sprocket 9 rotates. When the upper step sprocket 9 rotates, the lower step sprocket 11 rotates and the step chain 10 circulates.

The escalator also includes a plurality of steps 12 provided on the main frame 1 and a pair of balustrades 13 provided to face each other in the width direction of the steps 12. The plurality of steps 12 are connected to each other by a step chain 10. As the step chain 10 circulates, a plurality of steps 12 circulate.

Further, the escalator is supported by the connecting shaft 14 rotatably supported by the main frame 1, a ratchet pole 15 fixed to the connecting shaft 14, a shoe lever 16 fixed to the connecting shaft 14, and a shoe lever 16. Shoe 17. The connection shaft 14 is arranged to extend along the main shaft 7. The ratchet pawl 15 is displaced between a braking position where the ratchet pawl 15 hits the ratchet wheel 8 and a release position where the ratchet pawl 15 separates from the ratchet wheel 8. The ratchet pole 15 is displaced between the braking position and the release position by the rotation of the connection shaft 14. When the ratchet pole 15 hits the ratchet wheel 8, the rotation of the ratchet wheel 8 is prevented.

The shoe 17 is placed on the drive chain 5. When the drive chain 5 breaks, the shoe 17 moves downward. As the shoe 17 moves downward, the shoe lever 16 rotates. The rotation of the shoe lever 16 causes the connection shaft 14 to rotate. Therefore, when the drive chain 5 is broken, the ratchet pawl 15 moves from the release position to the braking position.

The ratchet wheel 8 has an annular wheel body 81 having a plurality of teeth 811 formed on an outer peripheral portion, an annular boss 82 fixed to the main shaft 7, and brakes rotation of the boss 82 with respect to the wheel body 81. And a rotation braking unit 83. When the position of the ratchet pole 15 is the braking position, the ratchet pole 15 hits the teeth 811. Thereby, rotation of the wheel main body 81 is prevented.

FIG. 3 is an enlarged view showing a portion A in FIG. The boss 82 has a boss body 821 formed in an annular shape, a radial extension 822 extending radially outward from an outer peripheral portion of the boss main body 821, and a periphery extending in the circumferential direction D from a distal end of the radial extension 822. And a direction extending portion 823. The circumferential direction D in which the circumferential extending portion 823 extends is the rotation direction of the ratchet wheel 8. As shown in FIG. 2, the boss 82 includes a plurality of radially extending portions 822 and a plurality of circumferentially extending portions 823. The plurality of radially extending portions 822 and the plurality of circumferentially extending portions 823 are arranged at equal intervals in the circumferential direction.

As shown in FIG. 3, the wheel body 81 includes a wheel portion 812 having teeth 811 formed thereon, a radially extending portion 813 extending radially inward from an inner peripheral portion of the wheel portion 812, and a distal end of the radially extending portion 813. And a circumferentially extending portion 814 extending in the circumferential direction E from the portion. The circumferential direction E in which the circumferential extending portion 814 extends is opposite to the rotational direction of the ratchet wheel 8. As shown in FIG. 2, the wheel main body 81 includes a plurality of radially extending portions 813 and a plurality of circumferentially extending portions 814. The plurality of radially extending portions 813 and the plurality of circumferentially extending portions 814 are arranged at equal intervals in the circumferential direction.

周 As shown in FIG. 3, a circumferential extension 814 is arranged between the boss body 821 and the circumferential extension 823. A circumferential extension 823 is arranged between the wheel 812 and the circumferential extension 814.

The rotation braking unit 83 includes a friction member 831 provided on the wheel body 81. The friction member 831 includes a pair of friction plates 832 provided over the wheel portion 812 and the circumferentially extending portion 814, and fastening for fixing the pair of friction plates 832 to the wheel portion 812 and the circumferentially extending portion 814. Tool 833. The pair of friction plates 832 are arranged so as to sandwich the boss 82 in the thickness direction of the boss 82. The pair of friction plates 832 is in contact with both side surfaces of the circumferentially extending portion 823. The pair of friction plates 832 are provided at four portions of the wheel body 81 which are arranged at equal intervals in the circumferential direction. The wheel body 81 is held by the boss 82 by the frictional force of the friction plate 832 against the side surface of the circumferentially extending portion 823. By holding the wheel body 81 on the boss 82, the wheel body 81 rotates together with the boss 82 when the ratchet pole 15 does not hit the teeth 811. The fastener 833 is composed of a bolt and a nut.

FIG. 4 is an enlarged view showing a portion B in FIG. The friction member 831 includes a pair of friction plates 834 provided over the wheel portion 812 and the circumferential extension 814, and fastening for fixing the pair of friction plates 834 to the wheel portion 812 and the circumferential extension 814. Tool 835. The pair of friction plates 834 are arranged so as to sandwich the boss 82 in the thickness direction of the boss 82. The pair of friction plates 834 are disposed forward of the circumferentially extending portion 823 in the rotation direction of the ratchet wheel 8 when the ratchet pole 15 does not contact the teeth 811. When the boss 82 rotates with respect to the wheel main body 81, the circumferentially extending portion 823 is disposed between the pair of friction plates 834. In this case, the pair of friction plates 834 contact both side surfaces of the circumferentially extending portion 823. Therefore, the friction member 831 is arranged so that the area of the side surface of the boss 82 that contacts the friction member 831 increases as the boss 82 rotates relative to the wheel body 81 in the rotation direction of the ratchet wheel 8. . A pair of friction plates 834 are provided at each of two portions of the wheel body 81 that sandwich the main shaft 7. The fastener 835 includes a bolt and a nut.

FIG. 5 is an enlarged view showing a portion C in FIG. The friction member 831 is provided with a pair of friction plates 836 provided over the wheel portion 812 and the circumferentially extending portion 814, and fastening the pair of friction plates 836 to the wheel portion 812 and the circumferentially extending portion 814. Tool 837. The pair of friction plates 836 are arranged so as to sandwich the boss 82 in the thickness direction of the boss 82. The pair of friction plates 836 are arranged forward of the circumferentially extending portion 823 in the rotation direction of the ratchet wheel 8 when the ratchet pole 15 does not contact the teeth 811. When the boss 82 rotates with respect to the wheel body 81 and the circumferentially extending portion 823 is disposed between the pair of friction plates 834, and then the boss 82 further rotates with respect to the wheel body 81, the pair of friction plates A circumferentially extending portion 823 is arranged between 836. In this case, the pair of friction plates 836 contact both side surfaces of the circumferentially extending portion 823. Therefore, the friction member 831 is arranged so that the area of the side surface of the boss 82 that contacts the friction member 831 increases as the boss 82 rotates relative to the wheel body 81 in the rotation direction of the ratchet wheel 8. . A pair of friction plates 836 are provided at each of two portions of the wheel main body 81 that sandwich the main shaft 7. The fastener 837 includes a bolt and a nut.

The emergency braking device of the escalator includes a ratchet wheel 8, a connecting shaft 14, a ratchet pole 15, a shoe lever 16, and a shoe 17.

Next, the operation of the emergency braking device of the escalator will be described. If the drive chain 5 breaks, the ratchet pawl 15 moves from the release position to the braking position. Thus, the teeth 811 of the wheel main body 81 hit the ratchet pole 15. As a result, the rotation of the wheel body 81 is prevented.

ボス The boss 82 rotates with respect to the wheel body 81 by preventing the rotation of the wheel body 81. Thus, the circumferentially extending portion 823 is disposed between the pair of friction plates 834. As a result, as the boss 82 rotates relative to the wheel body 81 in the rotation direction of the ratchet wheel 8, the area of the side surface of the boss 82 that contacts the friction member 831 increases. Accordingly, as the boss 82 rotates with respect to the wheel body 81 in the rotation direction of the ratchet wheel 8, the frictional force generated between the side surface of the boss 82 and the friction member 831 increases. Therefore, the braking force on the main shaft 7 by the rotation braking unit 83 increases.

After that, the boss 82 further rotates with respect to the wheel body 81. Thus, the circumferentially extending portion 823 is disposed between the pair of friction plates 836. As a result, as the boss 82 rotates relative to the wheel body 81 in the rotation direction of the ratchet wheel 8, the area of the side surface of the boss 82 that contacts the friction member 831 further increases. Thereby, as the boss 82 rotates with respect to the wheel body 81 in the rotation direction of the ratchet wheel 8, the frictional force generated between the side surface of the boss 82 and the friction member 831 further increases. Therefore, the braking force on the main shaft 7 by the rotation braking unit 83 is further increased.

After that, the boss 82 further rotates with respect to the wheel body 81. Thereby, the circumferential extension 823 hits the radial extension 813, and the circumferential extension 814 hits the radial extension 822. In other words, the boss 82 contacts the wheel main body 81 in the rotation direction of the ratchet wheel 8. Thus, the rotation of the boss 82 with respect to the wheel body 81 is stopped. As a result, the rotation of the main shaft 7 is stopped. Thereby, the movement of the steps 12 is stopped.

As described above, according to the escalator emergency braking device according to the first embodiment of the present invention, ratchet wheel 8 includes wheel body 81, boss 82 fixed to main shaft 7, and boss 82 for wheel body 81. And a rotation braking unit 83 that brakes the rotation of. The rotation braking unit 83 has a friction member 831 provided on the wheel body 81 and in contact with the side surface of the boss 82. The friction member 831 is arranged such that the area of the boss 82 that contacts the friction member 831 increases as the boss 82 rotates with respect to the wheel body 81. Accordingly, the braking force acting on the main shaft 7 when the ratchet pole 15 hits the teeth 811 can be made larger as the main shaft 7 rotates with respect to the teeth 811. As a result, the impact on the passenger when the emergency braking device of the escalator stops the movement of the steps 12 can be reduced. Further, the ratchet wheel 8 includes a wheel body 81 formed in an annular shape, a boss 82 formed in an annular shape, and a rotation braking unit 83. Thereby, the structure of the ratchet wheel 8 can be simplified as compared with a conventional ratchet wheel having four annular disks.

摩擦 Friction member 831 contacts both side surfaces of boss 82. Thereby, the frictional force of the friction member 831 on the boss 82 can be increased.

In the first embodiment, an escalator has been described as an example of the passenger conveyor. However, the present invention is not limited to this, and may be a moving sidewalk.

In the first embodiment, the configuration in which the friction member 831 is provided on the wheel main body 81 has been described. However, the configuration is not limited thereto, and the friction member 831 may be provided on the boss 82. In this case, the friction member 831 contacts the side surface of the circumferentially extending portion 814.

In the first embodiment, the configuration in which the friction member 831 includes the friction plate 832, the friction plate 834, and the friction plate 836 has been described. However, not limited to this, the friction member 831 has a configuration in which the area of the side surface of the boss 82 that contacts the friction member 831 increases as the boss 82 rotates with respect to the wheel body 81 in the rotation direction of the ratchet wheel 8. I just need.

1 main frame, 2 motor, 3 reduction gear, 4 drive sprocket, 5 drive chain, 6 main sprocket, 7 main shaft, 8 ratchet wheel, 9 upper step sprocket, 10 step chain, 11 lower step sprocket, 12 step, 13 railing, 14 connection shaft, 15 ratchet pole, 16 shoe lever, 17 shoe, 81 wheel body, 82 boss, 83 rotation braking part, 811 teeth, 812 wheel part, 813 radial extension, 814 circumferential extension, 821 boss body, 822 radial extension, 823 circumferential extension, 831 friction member, 832 friction plate, 833 fastening tool, 834 friction plate, 835 fastening tool, 836 friction board, 837 fastening tool.

Claims

A ratchet wheel provided on the main shaft,
And a ratchet pole for preventing rotation of the ratchet wheel,
The ratchet wheel,
A wheel body having a plurality of teeth formed on an outer peripheral portion,
A boss fixed to the main shaft,
A rotation braking unit that brakes the rotation of the boss with respect to the wheel body,
The rotation braking unit is provided on one of the wheel body and the boss, and has a friction member that contacts the other side surface of the wheel body and the boss.
The friction conveyor is arranged such that as the boss rotates relative to the wheel body in the direction of rotation of the ratchet wheel, an area of the other side surface contacting the friction member increases. Emergency braking device.
The emergency braking device for a passenger conveyor according to claim 1, wherein the friction member contacts the other side surface.