JPWO2020054065A1 - Emergency braking device for passenger conveyor - Google Patents

Abstract

An escalator emergency braking device is obtained that can increase the braking force acting on the spindle when the ratchet pole hits the teeth as the spindle rotates with respect to the teeth, and can simplify the structure of the ratchet wheel. The emergency braking device of this escalator includes a ratchet wheel provided on the main shaft, and the ratchet wheel has a wheel body, a boss fixed to the main shaft, and a rotary braking unit for braking the rotation of the boss with respect to the wheel body. The rotary braking portion has a friction member provided on the wheel body and contacts the side surface of the boss, and the friction member has an area in contact with the friction member on the side surface of the boss as the boss rotates with respect to the wheel body. It is arranged so that it becomes large.

Description

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

Conventionally, an emergency braking device for an escalator including a ratchet wheel provided on a spindle and a ratchet pole that prevents the ratchet wheel from rotating has been known. The ratchet wheel is provided in the gap between four annular discs provided in order with a radial gap around the spindle and the discs adjacent to each other in the radial direction, and adjacent to each other in the radial direction. It has a friction member that generates a frictional force between the disks. The disc arranged on the innermost side in the radial direction among the four discs is fixed to the spindle. A plurality of teeth to which the ratchet pole hits are formed on the disc arranged on the outermost side in the radial direction among the four discs. The braking force acting on the spindle when the ratchet pole hits the tooth becomes larger as the spindle rotates with respect to the tooth (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-227117

However, the emergency braking device for 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-mentioned problems, and an object of the present invention is to apply a braking force acting on the spindle when the ratchet pole hits the teeth as the spindle rotates with respect to the teeth. It provides an emergency braking device for a passenger conveyor that can be made larger and the structure of the ratchet wheel can be simplified.

The emergency braking device of the passenger conveyor according to the present invention includes a ratchet wheel provided on the main shaft and a ratchet pole that prevents the ratchet wheel from rotating. The ratchet wheel is a wheel body having a plurality of teeth formed on the outer peripheral portion thereof. It has a boss fixed to the main shaft and a rotation braking part that brakes the rotation of the boss with respect to the wheel body. The rotation braking part is provided on either the wheel body or the boss, and the other of the wheel body and the boss. The friction member is arranged so that the area of contact with the friction member on the other side surface increases as the boss rotates with respect to the wheel body in the rotation direction of the ratchet wheel. Has been done.

According to the emergency braking device of the passenger conveyor according to the present invention, the friction member has an area of contact with the friction member on the other side surface as the boss rotates with respect to the wheel body in the rotation direction of the ratchet wheel. Is placed in. As a result, the braking force acting on the spindle when the ratchet pole hits the teeth can be increased as the spindle rotates with respect to the teeth, and the structure of the ratchet wheel can be simplified.

It is a side view which shows the escalator which concerns on Embodiment 1 of this invention. It is an enlarged view which shows the main part of the escalator of FIG. It is an enlarged view which shows the part A of FIG. It is an enlarged view which shows the B part of FIG. It is an enlarged view which shows the part C of FIG.

Embodiment 1.
FIG. 1 is a side view showing an escalator according to a first embodiment of the present invention. FIG. 2 is an enlarged view showing a main part of the escalator of FIG. The escalator, which is a passenger conveyor, has a main frame 1 provided across the upper floor and the lower floor, a motor 2 provided in the main frame 1, and a deceleration in which the power of the motor 2 is transmitted. It includes a machine 3 and a drive sprocket 4 in 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 side horizontal portion of the main frame 1. The power of the motor 2 is transmitted to the drive sprocket 4, so that the drive sprocket 4 rotates.

Further, the escalator includes a drive chain 5 wound around the drive sprocket 4, a main sprocket 6 around which the drive chain 5 is wound, and a spindle 7 fixed to the main sprocket 6. The drive chain 5, the main sprocket 6, and the main shaft 7 are arranged on the upper floor side horizontal portion of the main frame 1. The drive chain 5 circulates as the drive sprocket 4 rotates. The main sprocket 6 rotates as the drive chain 5 circulates and moves. The rotation of the main sprocket 6 causes the spindle 7 to rotate.

Further, 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 the upper floor side horizontal portion in the main frame 1. Further, the escalator includes a step chain 10 that is wound around the upper step sprocket 9 and circulates around, and a lower step sprocket 11 around which the step chain 10 is wound. The lower step sprocket 11 is arranged in the lower floor side horizontal portion in the main frame 1. As the spindle 7 rotates, the upper step sprocket 9 rotates. As the upper step sprocket 9 rotates, the lower step sprocket 11 rotates and the step chain 10 circulates.

Further, the escalator includes a plurality of steps 12 provided on the main frame 1 and a pair of balustrades 13 provided so as 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, the plurality of steps 12 circulate.

Further, the escalator is supported by a 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. It is equipped with a ratchet 17. The connecting shaft 14 is arranged so as to extend along the main shaft 7. The ratchet pole 15 is displaced between the braking position where the ratchet pole 15 hits the ratchet wheel 8 and the release position where the ratchet pole 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 connecting 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 mounted 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. As the shoe lever 16 rotates, the connecting shaft 14 rotates. Therefore, when the drive chain 5 is broken, the ratchet pole 15 moves from the release position to the braking position.

The ratchet wheel 8 brakes the rotation of the ring-shaped wheel body 81 having a plurality of teeth 811 formed on the outer peripheral portion, the ring-shaped boss 82 fixed to the spindle 7, and the boss 82 with respect to the wheel body 81. It is provided with a rotary braking unit 83. When the position of the ratchet pole 15 is the braking position, the ratchet pole 15 hits the tooth 811. As a result, the rotation of the wheel body 81 is prevented.

FIG. 3 is an enlarged view showing a part A of FIG. The boss 82 includes a boss body 821 formed in a ring shape, a radial extension portion 822 extending radially outward from the outer peripheral portion of the boss body 821, and a circumference extending in the circumferential direction D from the tip end portion of the radial extension portion 822. It is provided with a directional extension 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 radial extension portions 822 and a plurality of circumferential extension portions 823. The plurality of radial extension portions 822 and the plurality of circumferential extension portions 823 are arranged side by side at equal intervals in the circumferential direction.

As shown in FIG. 3, the wheel body 81 includes a wheel portion 812 on which teeth 811 are formed, a radial extension portion 813 extending radially inward from the inner peripheral portion of the wheel portion 812, and a tip of the radial extension portion 813. It is provided with a circumferential extension portion 814 extending from the portion in the circumferential direction E. The circumferential direction E in which the circumferential extending portion 814 extends is in the direction opposite to the rotation direction of the ratchet wheel 8. As shown in FIG. 2, the wheel body 81 includes a plurality of radial extension portions 813 and a plurality of circumferential extension portions 814. The plurality of radial extension portions 813 and the plurality of circumferential extension portions 814 are arranged side by side at equal intervals in the circumferential direction.

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

The rotary braking unit 83 includes a friction member 831 provided on the wheel body 81. The friction member 831 is tightened to fix a pair of friction plates 832 provided over the wheel portion 812 and the circumferential extension portion 814 and a pair of friction plates 832 to the wheel portion 812 and the circumferential extension portion 814. It is equipped with a tool 833. The pair of friction plates 832 are arranged so as to sandwich the boss 82 in the plate thickness direction of the boss 82. The pair of friction plates 832 are in contact with both side surfaces of the circumferential extension 823. The pair of friction plates 832 are provided at each of the four portions of the wheel body 81 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 with respect to the side surface of the circumferential extension 823. By holding the wheel body 81 by 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 of FIG. The friction member 831 is tightened to fix a pair of friction plates 834 provided over the wheel portion 812 and the circumferential extension portion 814 and a pair of friction plates 834 to the wheel portion 812 and the circumferential extension portion 814. It is equipped with a tool 835. The pair of friction plates 834 are arranged so as to sandwich the boss 82 in the plate thickness direction of the boss 82. The pair of friction plates 834 are arranged in front of the circumferential extension 823 in the rotational direction of the ratchet wheel 8 when the ratchet pole 15 does not touch the teeth 811. When the boss 82 rotates with respect to the wheel body 81, the circumferential extension 823 is arranged between the pair of friction plates 834. In this case, the pair of friction plates 834 come into contact with both side surfaces of the circumferential extension 823. Therefore, the friction member 831 is arranged so that the area in contact with the friction member 831 on the side surface of the boss 82 increases as the boss 82 rotates with respect 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 spindle 7. The fastener 835 is composed of a bolt and a nut.

FIG. 5 is an enlarged view showing a portion C in FIG. The friction member 831 is tightened to fix a pair of friction plates 836 provided over the wheel portion 812 and the circumferential extension portion 814 and a pair of friction plates 836 to the wheel portion 812 and the circumferential extension portion 814. It is equipped with a tool 837. The pair of friction plates 836 are arranged so as to sandwich the boss 82 in the plate thickness direction of the boss 82. The pair of friction plates 836 are arranged in front of the circumferential extension 823 in the rotation direction of the ratchet wheel 8 when the ratchet pole 15 does not touch the teeth 811. When the boss 82 rotates with respect to the wheel body 81, the circumferential extension 823 is arranged 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 circumferential extension 823 is arranged between the 836s. In this case, the pair of friction plates 836 come into contact with both side surfaces of the circumferential extension 823. Therefore, the friction member 831 is arranged so that the area in contact with the friction member 831 on the side surface of the boss 82 increases as the boss 82 rotates with respect to the wheel body 81 in the rotation direction of the ratchet wheel 8. .. The pair of friction plates 836 are provided at each of the two portions of the wheel body 81 that sandwich the spindle 7. The fastener 837 is composed of a bolt and a nut.

The emergency braking device of the escalator is composed of 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. When the drive chain 5 breaks, the ratchet pole 15 moves from the release position to the braking position. As a result, the teeth 811 of the wheel body 81 hit the ratchet pole 15. As a result, the rotation of the wheel body 81 is blocked.

By blocking the rotation of the wheel body 81, the boss 82 rotates with respect to the wheel body 81. As a result, the circumferential extension 823 is arranged between the pair of friction plates 834. As a result, as the boss 82 rotates with respect to the wheel body 81 in the rotation direction of the ratchet wheel 8, the area of contact with the friction member 831 on the side surface of the boss 82 increases. As a result, 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 of the spindle 7 by the rotary braking unit 83 increases.

After that, the boss 82 further rotates with respect to the wheel body 81. As a result, the circumferential extension 823 is arranged between the pair of friction plates 836. As a result, as the boss 82 rotates with respect to the wheel body 81 in the rotation direction of the ratchet wheel 8, the area of the side surface of the boss 82 in contact with the friction member 831 becomes larger. As a result, 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 becomes larger. Therefore, the braking force of the spindle 7 by the rotary braking unit 83 becomes even larger.

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

As described above, according to the emergency braking device of the escalator according to the first embodiment of the present invention, the ratchet wheel 8 includes the wheel body 81, the boss 82 fixed to the spindle 7, and the boss 82 with respect to the wheel body 81. It has a rotation braking unit 83 for braking the rotation of the wheel. The rotary 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 so that the area of the boss 82 in contact with the friction member 831 increases as the boss 82 rotates with respect to the wheel body 81. As a result, the braking force acting on the spindle 7 when the ratchet pole 15 hits the teeth 811 can be increased as the spindle 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 step 12 can be alleviated. Further, the ratchet wheel 8 has a wheel body 81 formed in a ring shape, a boss 82 formed in a ring shape, and a rotary braking portion 83. As a result, the structure of the ratchet wheel 8 can be simplified as compared with a conventional ratchet wheel having four ring-shaped disks.

Further, the friction member 831 comes into contact with both side surfaces of the boss 82. As a result, the frictional force of the friction member 831 with respect to the boss 82 can be increased.

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

Further, in the first embodiment, the configuration in which the friction member 831 is provided on the wheel body 81 has been described. However, the present invention is not limited to this, and the friction member 831 may be provided on the boss 82. In this case, the friction member 831 comes into contact with the side surface of the circumferential extension 814.

Further, 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 contact with the friction member 831 on the side surface of the boss 82 increases as the boss 82 rotates with respect to the wheel body 81 in the rotation direction of the ratchet wheel 8. All you need is.

1 Main frame, 2 motors, 3 speed reducers, 4 drive sprockets, 5 drive chains, 6 main sprockets, 7 spindles, 8 ratchet wheels, 9 upper step sprockets, 10 step chains, 11 lower step sprockets, 12 steps, 13 balustrades 14 connecting shaft, 15 ratchet pole, 16 shoe lever, 17 shoe, 81 wheel body, 82 boss, 83 rotary braking part, 811 teeth, 812 wheel part, 813 radial extension part, 814 circumferential extension part, 821 boss body, 822 radial extension, 823 circumferential extension, 831 friction member, 832 friction plate, 833 fastener, 834 friction plate, 835 fastener, 836 friction plate, 837 fastener.

Claims (2)

The ratchet wheel provided on the spindle and
It is equipped with a ratchet pole that prevents the ratchet wheel from rotating.
The ratchet wheel
A wheel body with multiple teeth formed on the outer circumference,
With the boss fixed to the spindle,
It has a rotary braking unit that brakes the rotation of the boss with respect to the wheel body.
The rotary braking portion is provided on either one of the wheel body and the boss, and has a friction member that comes into contact with the other side surface of the wheel body and the boss.
The friction member is arranged so that the area of contact with the friction member on the other side surface increases as the boss rotates with respect to the wheel body in the rotation direction of the ratchet wheel. Emergency braking device. The emergency braking device for a passenger conveyor according to claim 1, wherein the friction member contacts both side surfaces of the other side.

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