JP2011201611A - Emergency braking device of escalator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency braking device of an escalator, which easily adjusts a position of a shoe lever, even when a chain angle is largely changed in response to updating of a driving machine.SOLUTION: This emergency braking device of the escalator includes an angle adjusting means (10) having: a fixing means (12) installed on a shaft (1) via an installation part of the shoe lever (7) and normally rotating or reversely rotating the shaft by transmitting the rotation of the installation part of the shoe lever to the shaft; and a unidirectional fixing means (11) for rotating the shaft in the desired one direction by transmitting the rotation of the installation part of the shoe lever to the shaft only when the rotational direction of the installation part of the shoe lever is any one direction of normal rotation or reverse rotation.

Description

  The present invention relates to an emergency braking device for an escalator that detects a break of a drive chain and prevents rotation of a main shaft.

  In general, in an escalator, a driving force of a driving machine provided in a machine room is transmitted to a main shaft by a driving chain, and a step moves up and down between both entrances and exits by rotation of the main shaft. In addition, the brake device for stopping the movement of the step is usually directly connected to the output shaft of the drive machine. When the escalator is stopped or when a power failure occurs, the brake device is operated to stop the rotation of the output shaft of the drive machine, thereby stopping the rotation of the main shaft via the drive chain.

  Furthermore, since such an escalator has an inclined part between both entrances and exits, when a passenger is on the step, a rotational force always acts in a direction in which the step descends with respect to the main shaft. Therefore, in the escalator, when the step is stopped when the operation is stopped, the brake device is always operated to prevent the step from descending.

  However, in an escalator equipped with such a brake device, if the drive chain breaks, even if the brake device is operated, the braking force is not transmitted to the main shaft, and the lowering of the step cannot be stopped. For this reason, if a passenger is on the step when the drive chain is broken, the step starts to descend due to the weight of the passenger and gradually accelerates. Therefore, the escalator is provided with an emergency braking device for stopping the rotation of the main shaft and preventing the step from descending when the breakage of the drive chain is detected (see, for example, Patent Document 1).

  In the escalator in Patent Document 1, since the shaft and the shoe lever are fixed with bolts, the shoe lever can be set at any angle. However, when it is necessary to reset the position of the shoe lever, for example, when the drive machine is updated, the bolts must be loosened, adjusted, and tightened. As a result, the bolt tightening work in a limited space is required, and the installation burden increases.

  4A and 4B are configuration diagrams of a conventional emergency braking device for an escalator in a normal state. FIG. 4A is a front view, FIG. 4B is a left side view, and FIG. 4C is a right side view. The shaft 1 is supported by a bracket 3 welded to the brake beam 2. A ratchet pole 4 and an angle adjustment bracket 5 are coupled to the shaft 1 by pins 6 respectively. A shoe lever 7 is fixed to the angle adjustment bracket 5 with a bolt.

  FIG. 5 is a block diagram of a conventional escalator emergency braking device when the chain is broken, where (a) shows a front view, (b) shows a left side view, and (c) shows a right side view. The arrows in FIG. 5 indicate the operating directions of the shoe lever 7 and the ratchet pole 4 when the chain 8 is broken. As shown in FIG. 5, when the chain 8 is broken, the shoe lever 7 is lowered by its own weight. As a result, the shaft 1 rotates and the ratchet pole 4 meshes with the ratchet wheel 9 to stop the escalator.

  In the conventional apparatus shown in FIGS. 4 and 5, the position of the shoe lever 7 can be adjusted by a screw hole formed in the angle adjustment bracket 5, and a small angle adjustment at the time of new installation is possible.

JP 2008-24480 A

However, the prior art has the following problems.
In the case where the chain angle greatly changes with the update of the driving machine, the conventional adjustment method using the screw holes opened in the angle adjustment bracket 5 cannot cope with it. In such a case, it is necessary to repin the pin 6.

  The present invention has been made to solve the above-described problems, and easily adjusts the position of the shoe lever even when the chain angle changes greatly as the drive unit is updated. The aim is to obtain an emergency braking device for an escalator.

  The emergency braking device for an escalator according to the present invention is fixed to a shaft that rotates in conjunction with the rotation of the shoe lever mounting portion when the drive chain of the escalator is broken and the shoe lever is lowered by its own weight in the vertical direction. The escalator emergency braking device that stops the escalator by engaging the ratchet pawl with the ratchet wheel, is attached to the shaft via the shoe lever mounting portion, and transmits the rotation of the shoe lever mounting portion to the shaft Thus, by transmitting the rotation of the shoe lever mounting portion to the shaft only when the rotation direction of the shoe lever mounting portion is forward rotation or reverse rotation and the rotation direction of the shoe lever mounting portion is either forward rotation or reverse rotation. And an angle adjusting means having a unidirectional fixing means for rotating the shaft in a desired direction. .

  According to the emergency braking device for an escalator according to the present invention, by providing the angle adjusting means capable of selecting the position of the shoe lever with respect to the shaft in a fixed state or a variable state, the chain angle greatly changes with the update of the driving machine. Even in such a case, it is possible to obtain an emergency braking device for an escalator that can easily adjust the position of the shoe lever.

It is a block diagram at the time of normal of the emergency braking device of the escalator in Embodiment 1 of this invention. It is a figure which shows the lock lever 12 provided in the shoe lever 7 in Embodiment 1 of this invention. It is a block diagram of the angle adjustment means in Embodiment 2 of this invention. It is a block diagram at the time of normal of the emergency braking device of the conventional escalator. It is a block diagram at the time of the chain fracture | rupture of the emergency braking device of the conventional escalator.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an emergency braking device for an escalator according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1 is a configuration diagram of the emergency braking device for an escalator according to Embodiment 1 of the present invention in a normal state, (a) is a front view, (b) is a left side view, and (c) is a right side view. Show. 4 and 5 which are the prior arts, the shoe lever 7 is bolted to the angle adjustment bracket 5, and the angle adjustment bracket 5 is connected to the shaft 1 by the pin 6. On the other hand, in the configuration of FIG. 1 in the first embodiment, the shoe lever 7 is coupled to the shaft 1 via the ratchet mechanism 10. Here, the ratchet mechanism 10 corresponds to an angle adjusting means.

  The ratchet pole 4 and the shaft 1 are connected to each other by a pin 6 as in the prior art. In addition, the shoe lever 7 in the first embodiment is provided with a switching lever 11 and a lock lever 12.

  Next, a method for adjusting the angle of the shoe lever 7 in the emergency braking device for an escalator according to the first embodiment having the configuration shown in FIG. 1 will be described. When the angle of the chain 8 changes greatly due to a drive machine update or the like, it is necessary to readjust the angle of the shoe lever 7. Therefore, in the emergency braking device for the escalator in the first embodiment, the attaching portion of the shaft 1 and the shoe lever 7 are connected by the ratchet mechanism 10.

  Further, the ratchet mechanism 10 is provided with a switching lever 11 so that the shoe lever 7 can be moved in an arbitrary direction. By switching the switching lever 11 to the left and right, the shoe lever 7 can be moved in any direction. Accordingly, when the angle of the shoe lever 7 is adjusted, the pin 6 that connects the ratchet pole 4 and the shaft 1 or the pin 6 that connects the angle adjustment bracket 5 and the shaft 1 is hit again. The required adjustment work is not necessary, and the angle of the shoe lever 7 can be easily adjusted manually.

  Further, the shaft 1 and the shoe lever 7 are connected via a ratchet mechanism 10, and the switching lever 11 is further provided so that the shoe lever 7 can be moved in any direction. For this reason, maintenance adjustment work on the shoe lever 7 side can be easily performed while maintaining the clearance between the ratchet pole 4 and the ratchet wheel 9.

  The emergency braking device for the escalator in the first embodiment rotates the shaft 1 by dropping the shoe lever 7 with its own weight when the chain 8 is stretched and loosened or broken. As a result, the escalator can be stopped when the ratchet pole 4 connected to the shaft 1 bites into the ratchet wheel 9. That is, after adjusting the shoe lever 7, the movable direction of the shoe lever 7 must be set clockwise in FIG. 1 (c).

  However, considering the case where the shoe lever 7 jumps up due to the vibration of the chain 8 while moving in the clockwise direction and then attempts to return to the steady position, there is the following risk. In this case, since the shoe lever 7 and the shaft 1 are connected by the ratchet mechanism 10, the shaft 1 rotates, and as a result, the ratchet pole 4 may bite into the ratchet wheel 9 and unnecessarily stop the escalator. There is.

  Therefore, the shoe lever 7 in the first embodiment is provided with a lock lever 12, and after adjusting the angle of the shoe lever 7, the shoe lever 7 is locked (ie, clockwise) by switching the lock lever 12. Can be locked so as not to move. FIG. 2 is a view showing the lock lever 12 provided on the shoe lever 7 in Embodiment 1 of the present invention. FIG. 2 (a) corresponds to an enlarged view of FIG. 1 (c), and FIG. FIG. 6B is a diagram illustrating a state where the shoe lever 7 is locked by switching the lock lever 12.

  By providing such a lock lever 12, the shoe lever 7 and the shaft 1 are locked even when the shoe lever 7 jumps up due to the vibration of the chain 8, and the ratchet pole 4 is locked by the shaft 1 and the pin 6. It is fixed. For this reason, the ratchet pole 4 also jumps up simultaneously with the shoe lever 7. However, when the shoe lever 7 returns to the steady position, the ratchet pole 4 also returns to the steady position together with the shoe lever 7, and the clearance between the ratchet pole 4 and the ratchet wheel 9 is maintained in a normal state. As a result, even when a phenomenon occurs in which the shoe lever 7 jumps up due to the vibration of the chain 8, the escalator is not stopped unnecessarily.

  Further, the switch lever 11 is provided so that the shoe lever 7 can be moved in an arbitrary direction, and the lock lever 12 is provided so that the shoe lever 7 and the shaft 1 can be fixed. And the ratchet wheel 9 can be easily checked for meshing.

  As described above, according to the first embodiment, the shoe lever and the shaft are connected via the ratchet mechanism, and the shoe lever can be easily moved in one direction. Furthermore, by providing the switching lever, the movable direction can be switched, and by providing the lock lever, the shoe lever and the shaft can be fixed after adjustment. Thus, it is possible to realize an emergency braking device for an escalator that can easily adjust the position of the shoe lever even when the chain angle changes greatly as the drive machine is updated.

  Specifically, even when the chain angle changes greatly due to a drive machine update or the like, the angle of the shoe lever can be easily adjusted manually without re-pinning the pin as in the prior art. Furthermore, since the rotation of the switching lever is possible in any direction, maintenance work with the clearance between the ratchet pole and the ratchet wheel maintained is facilitated. Furthermore, the engagement of the ratchet pole and the ratchet wheel can be easily confirmed during maintenance by the action of the lock lever that can set either the fixed mode or the one-way fixed mode.

Embodiment 2. FIG.
In the first embodiment, the emergency braking device for the escalator having the ratchet mechanism 10 as the angle adjusting means has been described. However, the angle adjusting means applicable in the present invention is not limited to the ratchet mechanism 10. Therefore, in the second embodiment, an angle adjusting unit having a configuration different from that of the ratchet mechanism 10 will be described.

  FIG. 3 is a configuration diagram of the angle adjusting means in the second embodiment of the present invention. As shown in FIG. 3, the angle adjusting means 20 in the second embodiment is configured to include a movable portion 21 and an adjusting bolt 22 instead of the ratchet mechanism 10.

  The movable portion 21 is attached to the attachment portion of the shaft 1 and rotates in synchronization with the shaft 1. The surface of the movable portion 21 is processed to have a projection shape or the like, and when the attachment portion 7a of the shoe lever 7 is sandwiched and restrained from the circumferential surface of the projection shape, a frictional force is generated. . The movable portion 21 is sandwiched between the attachment portions 7 a of the shoe lever 7 and is fastened by the adjustment bolt 22 to be fixed to the shaft 1.

  Thereby, the movable part 21 can be made into a fixed state by tightening the adjustment bolt 22. On the other hand, by loosening the adjustment bolt 22, the movable part 21 can be brought into a rotatable state. By setting the movable portion 21 in a fixed state, the angle between the shoe lever 7 and the shaft 1 is fixed. On the other hand, by making the movable portion 21 rotatable, the angle between the shoe lever 7 and the shaft 1 can be adjusted to an arbitrary angle.

  As described above, according to the second embodiment, the same effect as the ratchet mechanism in the first embodiment can be obtained by using the angle adjusting means including the movable portion 21 and the adjusting bolt 22. . Further, the angle adjusting means in the second embodiment has an advantage that the structure is simple and the cost is lower than the ratchet mechanism in the first embodiment.

  The angle adjusting means may be structured so that the angle of the shoe lever 7 can be selected between a fixed state and a variable state, and is not limited to the configuration shown in the first and second embodiments.

  1 axis, 2 brake beam, 3 bracket, 4 ratchet pole, 6 pin, 7 shoe lever, 7a mounting part, 8 chain, 9 ratchet wheel, 10 ratchet mechanism (angle adjusting means), 11 switching lever (unidirectional fixing means) ), 12 lock lever (fixing means), 20 angle adjusting means, 21 movable part, 22 adjusting bolt (fixing means).

Claims (1)

When the drive chain of the escalator is broken and the shoe lever is lowered by its own weight in the vertical direction, the ratchet wheel fixed to the rotating shaft is interlocked with the rotation of the shoe lever mounting portion and the ratchet wheel is engaged. In the emergency braking device of the escalator that stops the escalator by matching,
A fixing means attached to the shaft via the shoe lever mounting portion, and transmitting the rotation of the shoe lever mounting portion to the shaft, thereby rotating the shaft forward or backward;
By transmitting the rotation of the shoe lever mounting portion to the shaft only when the rotation direction of the shoe lever mounting portion is either the forward rotation or the reverse rotation, the shaft is moved in a desired direction. An emergency braking device for an escalator, comprising an angle adjusting means having a one-way fixing means for rotating.

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