CN1039000C - A slant type passenger conveyer - Google Patents

Abstract

An inclined passenger lift in which the steps are stopped and held when stopped by a small and simple device which can be conveniently fitted to the delivered lift. The inclined passenger elevator comprises: a main frame 1 installed obliquely, many steps installed in the main frame and moving with the step chain, a driving machine driving the step chain, and a pair of driving machines applying braking force There is also provided a restraining device 18 constituting a restraint by engaging the fixed part and the rotating part of the driving machine.

Description

Inclined Passenger Elevator

The present invention relates to an inclined type passenger elevator, such as an escalator installed obliquely in an up-down direction between upper and lower floors separated from each other, and a moving walkway, and particularly relates to an The inclined passenger elevator whose steps can be firmly fixed.

So far, the rotation of inclined passenger elevators such as escalators is such that the electric motor drives a drive sprocket through the gear reduction box, and then recirculates to drive a drive sprocket and a follower that is paired with the drive sprocket. A step chain on a moving sprocket, thereby driving a number of steps connected to the step chain.

Also, the steps are stopped and held by manipulating a braking device mounted on the driving machine during shutdown.

In addition, when the steps are stopped, in case the braking device loses its function due to malfunction or other reasons, a passenger boarding the steps applies a load and may cause the steps to descend. For preventing this phenomenon, proposed a kind of escalator that can lock above-mentioned driving sprocket, this technology has been revealed by Japanese Patent Published Application (JP A) 59-97985.

There is a problem in the above-mentioned prior art that since the large-diameter drive sprocket is directly locked, its structure itself is very large, and there is no space to install such a locking mechanism around the drive sprocket, so it is difficult for the actual use of the escalator. Adopting this mechanism will increase the volume of the escalator.

It is an object of the present invention to provide an inclined passenger elevator the steps of which can be stopped and held by a small device when stopped.

Another object of the present invention is to provide an inclined passenger elevator which has a simple structure and the above-mentioned small device can be easily installed after the elevator is put into use.

In order to achieve the above objects, the present invention provides a device for constraining by engaging with the rotating part of the driving machine of an inclined passenger elevator comprising upper and lower floors separated from each other and installed obliquely in the up and down direction. The main frame on the upper frame, a plurality of steps mounted in the main frame, connected to a step chain and moving with the step chain, and a drive sprocket mounted in the main frame with a drive sprocket wrapped around the step chain , and a driving machine that drives the step chain, and a brake device that applies a braking force to the rotating shaft of the driving machine.

According to the above structure, since the restraining device provided is engaged with the small-diameter rotating portion on the side of the driving machine away from the sprocket around which the step chain is wound, the rotational force acting on the restraining device becomes small, and as a result only The steps are stopped and held with a small device. Moreover, there is a considerable space around the driving machine, so this compact arrangement can also be applied to delivered elevators.

A brief description of the attached drawings:

Figure 1 is a vertical sectional view showing a driving machine with a restraint device and its surroundings according to the present invention;

Fig. 2 is the enlarged top view of driving machine shown in Fig. 1;

Fig. 3 is a side view showing the whole escalator;

Fig. 4 is the schematic diagram of the control system of each equipment shown in Fig. 1 and 2;

Fig. 5 is a vertical sectional view showing the surroundings of a driving machine with another restricting device according to the present invention.

An embodiment of an inclined passenger elevator according to the present invention is described below with reference to FIGS. 1 to 4. FIG. The inclined passenger elevator shown here is an escalator in which a plurality of steps 3 connected end to end to a step chain 2 are guided to circulate in a main frame 1 above which Installed obliquely in the downward direction between the upper floor UF and the lower floor LF which are separated from each other, the steps 3 are guided by guide rails (not shown) supported by the above-mentioned main frame 1 .

The above-mentioned step chain 2 is wound on a drive sprocket 4 and a follower sprocket 5 and is driven by the drive sprocket 4. The two sprockets are supported by the upper machine room 1A and the lower machine room 1B, and the two machine rooms are respectively set At both ends of the main frame 1.

The driving sprocket 4 is mounted on a shaft, on which a driven sprocket 6 is mounted. The transmission chain 7 is wound on the driven sprocket 6 and transmits the rotational force of the driving machine 8 to the driving sprocket 4 .

The driving machine 8 is provided with a braking device 9 that applies a braking force to the rotating shaft, such as an electromagnetic disc brake, which generates a braking force by a spring force and releases the braking force through an electromagnetic force generated by energizing a coil.

In addition, the handrail side panels 10 are arranged on both sides of the steps along the moving direction of the end-to-end connected steps 3, and the moving handrail bars 11 are supported around the periphery of the side panels. Stage 3 is driven synchronously.

The above-mentioned upper machine room 1A and lower machine room 1B are covered by upper and lower landing boards 12A and 12B, respectively.

On the other hand, the driving machine 8 includes an electric motor 13 and a gear reduction box 14 . The rotating shaft 16 of the motor 13 is connected to the input shaft of the gear reduction box 14, the sprocket wheel 15 is installed on the output shaft of the gear reduction box 14, and the transmission chain 7 is wound on the sprocket wheel 15.

Also, the above-mentioned braking device 9 is installed on the input shaft of the gear reduction box 14 .

The above-mentioned gear reduction box 14 is a so-called parallel axis speed reducer, in which the input shaft and the output shaft are arranged in parallel to each other, and a helical gear is used.

The above structure is a structure of a common escalator. The special feature of this embodiment is that a constraining device is provided to constrain the rotating portion of the driving machine 8 relative to the fixed portion of the driving machine 8 by engaging with each other. That is to say, restraint device is made up of a dog wheel 17 that is arranged on the rotating shaft 16 of electric motor 13 and a dog 18 on the fixed part, and when step 3 stopped, even brake device 9 failure, the dog The wheels and pawls can also stop and hold the step 3 by engaging each other.

The claw wheel 17 has a plurality of claws 17c formed around its periphery. Claw wheel 17 can be formed by a coupling, and this coupling connects the rotating shaft 16 of electric motor 13 and the input shaft of gear reduction box 14, and on the outer periphery of this coupling, make a lot of claws 17c, like this, can not A new claw wheel needs to be set and no installation space needs to be provided for it.

However, in case the rotating shaft 16 of the electric motor 13 and the input shaft of the reduction gearbox 14 are one shaft, no coupling will be required for the connection, and a dedicated dog wheel should be provided. In this case, the claw wheel 17 can be set, as long as the distance between the motor 13 and the gear reduction box 14 and the root shaft are larger, it is not necessary to leave a larger space to set it in a new way The claw wheel.

The claw 18 is L-shaped, and the engagement portion 19 that can be engaged with the claw 17c on the claw wheel 17 is located at one end thereof, and the curved portion of the claw 18 is rotatably supported on the gear reduction box 14 by a support shaft 20 on the box.

The other end of the L-shaped claw 18 is connected to an electromagnetic drive device 21 for manipulating the claw 18 . The electromagnetic driving device 21 is fixed on the casing of the above-mentioned gear reduction box 14, and includes a coil (not shown) that can generate electromagnetic force through energization, a movable iron core 22 driven by the electromagnetic force generated, and a for The return spring 18S that pushes the driven movable iron core 22 back to the original position. The movable iron core 22 has a free end connected with the other end of the L-shaped claw 18 through a pin. Moreover, the thrust produced by the return spring 18S makes the engagement portion 19 at one end of the L-shaped claw 18 always engage with the claws on the claw wheel 17, and the above-mentioned coil can generate magnetic force to drive the movable iron core to make the engagement portion 19 and the claw wheel 17. The pawl 17c moves in the direction of disengagement.

In addition, a detection switch 23 is fixed on the casing of the gear reduction box 14, and this switch 23 is installed on the side opposite to the engagement portion 19 at one end of the claw 18.

In the above structure, when the escalator stops, the electric motor 13 is cut off, and the electric motor 13 is braked by the braking device 9 through the input shaft of the gear reduction box 14 . In this way, the driving machine 8 is braked, and then the movement of the steps 3 is stopped by the transmission chain 7 and the step chain 2 .

At this time, assuming that the reduction ratio between the driven sprocket 6 and the sprocket 15 is about 1/4, and the reduction ratio between the sprocket 15 and the rotating shaft 16 is about 1/16 to 1/17, the total The reduction ratio is 1/64 to 1/68. Assuming that the passenger load tending to rotate the driven sprocket 6 is F, the rotational force F' acting on the claw wheel 17 on the rotating shaft 16 is F/64 to F/68 (F'=F/64 to F /68), which is very small. Therefore, the claw wheel 17 and the claw 18 can be made smaller.

In this way, when the step 3 is stopped by the braking device 9, the pawl 18 also engages with the pawl 17c on the pawl wheel 17 with its engaging portion 19 at the same time. Therefore, even if many passengers who exceed the braking capacity of the braking device 9 ride on the escalator, or even if the braking device 9 breaks down and loses the braking capacity during the stop of the escalator but there are still passengers riding on it, the steps 3 will Can not move down, because the rotation axis of driving machine 8 is constrained by dog 18.

Next, when the above-mentioned escalator issues an operation command in the stopped state, the controller 24 energizes the coil of the electromagnetic drive device 21 to generate electromagnetic force, which attracts the movable iron core 22 to overcome the pressure of the return spring 18S. Because the movable iron core 22 is sucked, the other end of the L-shaped claw 18 rotates around the support shaft as the center, and the engaging portion 19 at one end of the L-shaped claw 18 is separated from the pawl wheel 17 to disengage. Like this, when claw 18 rotates to the position that makes the engagement between meshing portion 19 and wheel pawl 17c disengage completely, one end of L-shaped claw 18 touches detection switch 23, after detection switch is touched, energizes braking device 9 and Make it release braking force, thereby make motor 13 start and begin to drive escalator again.

See the situation that the escalator that moves will be stopped again. When the stop operation command is issued, the motor 13 is started to decelerate by the controller 24, and when the motor 13 stops or a little earlier, the power supply to the braking device is stopped to generate braking force, so that the rotating shaft of the driving machine 8 is stopped. Live and hold on. When the brake device 9 generates the braking force, in other words, when the brake device 9 is de-energized, the coil of the electromagnetic drive device 21 is also de-energized. Because the coil of the electromagnetic drive device 21 is powered off, the magnetic force of the coil disappears, and the movable iron core 22 is no longer attracted, so that the movable iron core 22 in the electromagnetic drive device 21 is pushed against the other side of the L-shaped claw 18 by the thrust of the return spring 18S. At one end, the claw 18 is rotated around a support shaft 20 as a center. The rotation of the claw 18 makes the engagement portion 19 at one end close to the claw wheel 17 and engages with the claw 17c, thereby constraining the rotating shaft of the driving machine 8 .

In the above description, the coil of the electromagnetic driving device 21 is de-energized while the braking device 9 generates the braking force, whereby the rotating shaft of the driving machine 8 is constrained. In this case, if the braking device 9 and the electromagnetic driving device 21 are de-energized while the motor 13 is stopped, there will be no problem.

However, if the braking device 9 is de-energized a little before the motor 13 stops, the escalator will move a little distance due to inertia even if the braking force is applied. Therefore, in this case, there is a danger that while the electromagnetic drive device 21 is de-energized, a shutdown shock is generated at the moment of engagement between the engaging portion 19 and the pawl 17c, causing the engaging portion 19 and the pawl 17c to damage, and damage the gear reduction box 14 and other peripheral devices.

The above-mentioned shortcoming can be eliminated by using a time-delay device to delay the power-off of the coil of the electromagnetic drive device 21. That is to say, it is enough to provide a timer 25 to the controller, so that the timer acts on the basis of a power-off signal, so that the power-off of the electromagnetic drive device 21 occurs for a certain period of time after the braking device 9 is powered off. Afterwards (this delay time should be longer than the time until the escalator stops when the braking force is generated). To confirm the stop of the escalator, for example, a rotary encoder installed on the rotating shaft of the motor 13 can be used, and its pulse is provided to the controller 24 as a confirmation signal.

By providing such a timer 25, the engagement between the engaging portion 19 and the lug 17c can occur after the inertial motion of the escalator stops, thus preventing damage to the device.

Furthermore, the above-mentioned delay device is an electronic delay device controlled by the controller 24, but it can also be a mechanical delay device as shown in FIG. 5 . That is, it is constituted like this: be connected to the other end of L-shaped claw 18 by its bar 28 with a one-way damper 27, and this claw is connected to the movable iron core 22 of electromagnetic drive device 21 by a pin. The one-way damper 27 only has a damping effect in one direction. When the coil of the electromagnetic drive device 21 is energized, the other end of the claw 18 is sucked by the movable iron core 22. The damper has no damping effect, so the movable iron core can 22 moves quickly, on the contrary, when the coil of the electromagnetic drive device 21 is powered off, the return spring installed inside pushes the movable iron core 22 to make it protrude and push the other end of the claw 18, the damper has a damping effect, thus making It moves slowly. Since the other end of the claw 18 is slowly pushed back, the time before the meshing portion 19 and the claw 17c get into engagement can be protracted. As a result, the meshing portion 19 and the claw 17c can be stopped after the inertial motion of the escalator stops. Mesh with each other. By adjusting the time of the slow motion so that the slow motion ends after a certain time after the brake device 9 generates the braking force, as described above, damage to the surrounding devices can be prevented.

The above description is for escalators, of course, also applies to moving walkways installed at an angle.

As described above, according to the present embodiment, there is provided a restraint device that establishes restraint by engagement between the rotating part and the fixed part of the driving machine, so that the steps can be stopped and held by a small device when stopped Moreover, the device is small in size and is arranged around the rotating part of the driving machine, so that it can be easily applied to a passenger elevator already installed.

As described above, according to the present invention, a small device can be used to stop and hold the stopped steps, and the inclined passenger elevator can use this simple device in structure, which can be easily applied to the delivered elevator.

Claims (5)

1. An inclined passenger elevator, comprising: a main frame installed obliquely between the upper and lower floors separated from each other; The driving sprocket and the follower sprocket are respectively supported on the shafts of an upper machine room and a lower machine room, and the two machine rooms are respectively located at the upper end and the lower end of the length direction of the elevator; an endless step chain wrapped around said drive sprocket and follower sprocket and having steps connected thereto; a driven sprocket mounted coaxially with said drive sprocket; a drive chain wrapped around said driven sprocket; a gear reduction box having a sprocket around which said drive chain is wound; an electric motor for powering the gear reduction box; a braking device for applying a braking force to the rotating shaft of one of said electric motor and said gear reduction box; It is characterized in that it also provides a claw wheel on the rotating shaft of one of the motor and the gear reduction box, a claw supported by a fixed part and opposite to the claw of the claw wheel, and a total It is a pushing piece for pressing the claw against the claw wheel, an electromagnetic drive device for separating the claw pressed by the pushing piece from the upper claw of the claw wheel, and a controller for controlling the electric motor, brake and electromagnetic drive. 2. The inclined ground passenger elevator according to claim 1, further comprising a detection switch mounted on a fixed portion opposite to said dog engaging portion. 3. The inclined ground passenger elevator according to claim 1 or 2, further comprising a delay device for delaying the start of the electromagnetic drive device. 4. The inclined ground passenger elevator according to claim 3, characterized in that said delay device is a timer. 5. Inclined passenger elevator as claimed in claim 3, characterized in that, said delay device is a one-way damper, which has a damping effect in the direction in which said claw will act as a restraint, and in the Move quickly in the direction of release.

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