JPWO2019012641A1 - Emergency braking device for passenger conveyor - Google Patents

Abstract

The emergency braking device of the passenger conveyor is rotated between a ratchet wheel provided on the main shaft and rotated integrally with the main shaft, a position where the tip side is separated from the ratchet wheel, and a position where the tip side is engaged with the ratchet wheel Engaging claws, a spring attached to the engaging claws, and a spring that rotates the engaging claws to engage with the ratchet wheel, an engaging claw is fixed, and a shaft that is rotated along with the rotation of the engaging claws And a shoe removably mounted on the shaft and provided in contact with the drive chain, and when the shoe is mounted on the shaft and in contact with the drive chain, the rotation of the engagement claw is restricted. Separated from the ratchet wheel, the engaging pawl is pivoted into engagement with the ratchet wheel when the shoe is removed from the shaft.

Description

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

  In a conventional passenger conveyor emergency braking device, a ratchet wheel that rotates in conjunction with the movement of the step is provided, and when the drive chain breaks, the engaging claw rotates to engage with the ratchet wheel and stop the step. As a mechanism in which the engagement claws rotate by breakage of the drive chain, the engagement claws and the lever are attached to the shaft supported so as to be able to rotate, and the engagement claws and the lever are integrally rotated about the shaft. ing. In the normal state, the contactor is provided at the tip of the lever, and the contactor is placed on the stretched drive chain, thereby restricting rotation of the lever and the engagement claw. When the drive chain breaks, the restriction is released, and the lever is pivoted by its own weight and the engaging claw is pivoted. (See Patent Document 1)

Japanese Utility Model Publication No. 62-179284

  By the way, at the time of maintenance or the like, the operation of checking whether or not the engagement claws rotate to engage with the ratchet wheel is performed. By removing the drive chain, the regulation of the rotation of the lever and the engagement claw is released, and the operation confirmation is performed as to whether the engagement claw is rotated and engaged with the ratchet wheel. In order to restore the emergency braking device, the drive chain is attached, tension adjustment is performed, and it takes time and effort.

  The present invention has been made to solve such a problem, and it is an object of the present invention to provide an emergency braking device for a passenger conveyor that can easily check whether the engaging claws rotate to engage with the ratchet wheel. I assume.

  The emergency braking device of the passenger conveyor according to the present invention brakes the main shaft when the drive chain, which is wound around the driving device sprocket provided on the driving device and the main shaft driving sprocket provided on the main shaft and driving the steps breaks. An emergency braking device for a passenger conveyor, comprising: a ratchet wheel provided on a main shaft and rotated integrally with the main shaft; a position where the tip end is separated from the ratchet wheel; and a position where the tip end engages the ratchet wheel An engaging claw to be moved, a spring fixed on one side fixed to the engaging claw and the engaging claw being rotated to engage the ratchet wheel, and the engaging claw fixed; A contact member is mounted on the shaft, and the contact member is mounted on the shaft, and the contact member is detachably attached to the shaft and provided in contact with the drive chain. When it is in contact with the drive chain, the engagement pawl is restricted from pivoting so as to be separated from the ratchet wheel, and when the contact member is removed from the shaft, the engagement pawl is pivoted and the ratchet wheel Is engaged.

  According to the present invention, at the time of maintenance or the like, when the contact member is removed from the shaft, the regulation of the rotation of the engagement claw is released, and the spring rotates the engagement claw. As a result, it can be checked whether the engagement claws rotate and engage with the ratchet wheel. After confirming that the engagement pawl engages with the ratchet wheel, rotate the engagement pawl in the direction away from the ratchet wheel, attach the contact member to the shaft, and bring the contact member into contact with the drive chain to engage the engagement pawl Regulate the rotation of the In this way, by removing the contact member from the shaft, it can be checked whether the engaging claw pivots to engage with the ratchet wheel, and by attaching the contact member to the shaft, the emergency braking device can be returned.

  According to the present invention, it is possible to obtain an emergency braking device for a passenger conveyor that can easily check whether the engaging claws rotate to engage with the ratchet wheel.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram of the escalator which shows Embodiment 1 of this invention. It is a principal part enlarged view in the machine room of FIG. It is a principal part enlarged view in the machine room of FIG. It is a principal part enlarged view in the machine room of FIG. It is an enlarged view of the spring length adjustment machine of FIG.

Embodiment 1
An embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is an entire configuration diagram of an escalator showing a first embodiment of the present invention. FIG. 2 is an enlarged view of an essential part of the machine room of FIG. 1 and shows a state of normal operation. FIG. 3 is an enlarged view of an essential part in the machine room of FIG. 1 and shows a state in which the operation of the emergency braking device is checked. FIG. 4 is an enlarged view of an essential part in the machine room of FIG. 1 and shows a state in which the drive chain is broken. FIG. 5 is an enlarged view of the spring length adjuster in FIG.

  In the figure, a main frame 1 is installed in a building (not shown), and a plurality of steps 3 endlessly connected by a step chain 2 are supported by the main frame 1. On the main frame 1, a pair of balustrades 4 are provided on both sides in the width direction of the steps 3. A sprocket device 7, a drive 8 for driving the sprocket device 7, and an emergency braking device 20 for applying a braking force to the sprocket device 7 in an emergency are provided in a machine room 5 at the upper end of the main frame 1 in the longitudinal direction. .

  The sprocket device 7 has a main shaft 10 extending in the width direction of the steps 3, a main shaft driving sprocket 11 fixed to the main shaft 10, and an upper step sprocket 12. As shown in FIG. 3, the main shaft 10 is rotatably supported by the main frame 1 via the housing 6. The main shaft 10, the main shaft drive sprocket 11, and the upper step sprocket 12 are integrally rotated.

  The drive unit 8 includes a motor 13, a speed reducer 14, and a drive unit sprocket 15. The drive sprocket 15 is driven by the motor 13 via the reduction gear 14.

  An endless drive chain 16 is wound around the drive machine sprocket 15 and the spindle drive sprocket 11. The drive chain 16 is tensioned between the drive sprocket 15 and the spindle drive sprocket 11. The driving force given by the motor 13 is transmitted to the steps 3 via the drive chain 16.

  At the lower end in the longitudinal direction of the main frame 1, a lower step sprocket 17 is provided which is supported and rotated by a rotation shaft which is disposed extending in the width direction of the step 3. The step chain 2 is wound around the upper step sprocket 12 and the lower step sprocket 17. The step chain 2 is driven as the upper step sprocket 12 rotates. The steps 3 are cyclically moved with the drive of the step chain 2.

  During normal operation, a brake system (not shown) brakes the drive sprocket 15 and the step 3 is braked through the drive chain 16 accordingly. Therefore, for example, when the drive chain 16 breaks, it is not possible to brake the step 3 using the brake device. In such an emergency, the emergency braking device 20 applies a braking force to the sprocket device 7 and the steps 3 are braked.

  The emergency braking device 20 includes a ratchet wheel 21 attached to the main shaft 10, a support device 22 attached to the main frame 1, a detection device 23 for detecting breakage of the drive chain 16, and engagement with the ratchet wheel 21. And a combining device 24. The ratchet wheel 21 is rotated integrally with the main shaft 10, the main shaft drive sprocket 11 and the upper step sprocket 12. Thereby, the ratchet wheel 21 is interlocked with the step 3, and when the rotation of the ratchet wheel 21 is braked, the step 3 is braked.

  The support device 22 has a bearing member 25 and a connecting shaft 26 as a shaft. A pair of bearing members 25 are attached to the main frame 1 at a position obliquely above the main shaft 10 at an interval. Each bearing member 25 has a hole 25a. The connecting shafts 26 are passed through the respective holes 25 a and can rotate in a state of being supported by the bearing members 25.

  The detection device 23 has a shoe lever 27 as a lever and a shoe 28 as a contact member. The shoe lever 27 is fixed at its root portion to the connecting shaft 26 by a bolt (not shown). The shoe lever 27 can be removed from the connecting shaft 26 by removing the bolt. The shoe lever 27 fixed to the connecting shaft 26 can rotate integrally with the connecting shaft 26. A shoe 28 is attached to the tip of the shoe lever 27. The shoe 28 is mounted on a drive chain 16 stretched between a drive sprocket 15 and a spindle drive sprocket 11 and is in contact with the drive chain 16. Thus, the shoe lever 27 is restricted from rotating toward the ratchet wheel 21. When the drive chain 16 breaks, the shoes 28 do not contact the drive chain 16, the regulation of the pivoting of the shoe lever 27 is released, and the shoe lever 27 can pivot toward the ratchet wheel 21.

  The engagement device 24 has a ratchet pole 30 as an engagement claw, a spring length adjuster 31, a spring 32 and a fixing member 33. A base 30 a of the ratchet pole 30 is fixed to the connecting shaft 26. The shoe lever 27 and the ratchet pole 30 are connected by a connecting shaft 26. In a state where the connecting shaft 26 is supported by the bearing member 25, the ratchet pole 30, the shoe lever 27, and the connecting shaft 26 are integrally rotated. An engagement portion 30 b is provided on the distal end side of the ratchet pole 30. The ratchet pole 30 can rotate between a position where the engaging portion 30 b is separated from the ratchet wheel 21 and a position where the engaging portion 30 b is engaged with the ratchet wheel 21.

  A spring length adjuster 31 is provided on the distal end side of the ratchet pole 30. The fixing member 33 is attached to the housing 6. One of the springs 32 is attached to the fixing member 33 and the other is attached to the spring length adjuster 31. When the ratchet pole 30 is rotated in the direction away from the ratchet wheel 21, the spring 32 is stretched. The retracting force of the spring 32 causes the ratchet pole 30 to be pivoted toward the ratchet wheel 21 and engaged with the ratchet wheel 21.

  Thus, the force of the spring 32 that rotates toward the ratchet wheel 21 acts on the ratchet pole 30. When the shoe lever 27 is attached to the connecting shaft 26 and the shoe 28 is mounted on the drive chain 16, the rotation of the ratchet pole 30 and the shoe lever 27 is restricted, and the ratchet pole 30 It is not pivoted towards the ratchet wheel 21. When the shoe lever 27 is removed from the connecting shaft 26 and when the drive chain 16 is broken, the restriction on the rotation of the ratchet pole 30 is released, and the ratchet pole 30 is rotated and engaged with the ratchet wheel 21. Ru.

  The spring length adjuster 31 has a stopper 35, a spring mounting bolt 36 and a nut 37. The stop member 35 is provided on the ratchet pole 30 so as to protrude in a direction perpendicular to the direction in which the ratchet pole 30 is pivoted. The stopper member 35 has a hole 35a penetrating in the direction in which the ratchet pole 30 is rotated. A spring 32 is attached to the bolt head 36 a of the spring attachment bolt 36. The threaded portion 36 b of the spring mounting bolt 36 is threaded through the hole 35 a of the locking member 35 and a nut 37 is mounted. Thus, the spring attachment bolt 36 is attached to the stop member 35.

  When the nut 37 is tightened, the bolt head 36a moves away from the fixing member 33, and the spring 32 is stretched to increase its length. When the nut 37 is loosened, the bolt head 36a moves toward the fixing member 33, and the spring 32 contracts to shorten its length.

  The force by which the spring 32 rotates the ratchet pole 30 increases as the length of the spring 32 increases and decreases as the length decreases. The magnitude of the force with which the shoe 28 presses against the drive chain 16 in a state in which the rotation of the ratchet pole 30 and the shoe lever 27 is restricted increases as the length of the spring 32 increases and decreases as the length decreases. . The length of the spring 32 is adjusted to meet the ability to rotate the ratchet pole 30 to engage the ratchet wheel 21 and to ensure that the shoe 28 does not strike the drive chain 16 too much.

  According to the emergency braking device of the passenger conveyor configured as described above, the shoe lever 27 is removed from the connecting shaft 26, and the restriction on the rotation of the ratchet pole 30 is released. Then, the operation of checking whether the ratchet pole 30 is rotated and engaged with the ratchet wheel 21 is performed by the contraction force of the spring 32. After confirming the operation, the ratchet pole 30 is rotated in the direction away from the ratchet wheel 21, the shoe lever 27 is attached to the connecting shaft 26, the shoe 28 is placed on the drive chain 16, and the emergency braking device 20 is returned. As described above, only by detaching or attaching the shoe lever 27 from the connecting shaft 26, it is possible to easily check whether the ratchet pole 30 is rotated and engaged with the ratchet wheel 21.

  Further, at the time of breakage of the drive chain 16, the ratchet pole 30 is rotated by two forces of the contracting force of the spring 32 and the force of the shoe lever 27 rotating by its own weight, so that the reliability as the emergency braking device 20 can be improved.

  Also, for example, the bearing member 25 supporting the connecting shaft 26 wears over time, and the force required to rotate the ratchet pole 30 increases, and the operation of the emergency braking device 20 becomes unstable. In this case, by tightening the nut 37 of the spring length adjuster 31, the force for turning the ratchet pole 30 toward the ratchet wheel 21 can be easily adjusted large.

  In the present embodiment, as the means for attaching and detaching the shoe 28 as the contact member from the connecting shaft 26, the case where the shoe 28 is removed together with the shoe lever 27 has been described, but it is not limited thereto. 28 may be removed from the shoe lever 27.

  In the embodiment, the ratchet pole 30 is rotated by the compression force of the spring 32, but the arrangement of the spring 32 is changed to rotate the ratchet pole 30 by the expansion force of the spring 32. It is good.

3 steps, 8 drives, 10 spindles, 11 spindle drive sprockets,
15 drive sprockets, 16 drive chains, 20 emergency braking devices,
21 ratchet wheel, 22 support devices, 23 detection devices, 24 engagement devices,
25 bearing members, 25a holes, 26 connecting shafts, 27 shoe levers,
28 shoes, 30 ratchet poles, 30a base, 30b engagement parts,
31 spring length adjuster, 32 springs, 33 fixing members, 35 stop members,
35a hole, 36 spring mounting bolt, 36a bolt head, 37 nut

Claims (3)

An emergency braking device for a passenger conveyor that brakes the main shaft when a drive chain wound around a drive sprocket provided on the drive machine and a main shaft drive sprocket provided on the main shaft and driving the steps breaks.
A ratchet wheel provided on the main shaft and rotated integrally with the main shaft;
An engagement claw which is pivoted between a position where the distal end side is separated from the ratchet wheel and a position where the distal end side is engaged with the ratchet wheel;
A spring fixed on one side and attached to the other on the other, rotating the engagement claw to engage the ratchet wheel;
The engagement claw is fixed, and a shaft which is rotated as the engagement claw rotates.
A contact member removably mounted on the shaft and provided in contact with the drive chain;
Equipped with
When the contact member is attached to the shaft and in contact with the drive chain, the rotation of the engagement claw is restricted to be separated from the ratchet wheel,
An emergency braking device for a passenger conveyor, wherein the engagement pawl is pivoted into engagement with the ratchet wheel when the contact member is removed from the shaft. It comprises a lever removably mounted on the shaft,
The emergency braking device for a passenger conveyor according to claim 1, wherein the contact member is attached to the shaft via the lever.   The emergency braking device for a passenger conveyor according to claim 1 or 2, further comprising a spring length adjuster for adjusting the length of the spring in a state in which the contact member is in contact with the drive chain.

Images