JPS61248890A - Drive for passenger conveyor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a drive device for a passenger conveyor called an escalator, a moving walkway, etc., and in particular, a device that enables speed control using a belt-type continuously variable transmission. This invention relates to a drive device for a passenger conveyor.

[Conventional technology]

Conventionally, the driving device for the passenger conveyor has been disclosed in Japanese Patent Application Laid-Open No.
The one shown in Publication No. 786 and the like is known.

FIGS. 6 and 7 are for explaining this type of conventional passenger conveyor drive device. In the same figure, / is the main frame of the passenger conveyor, C is the machine room provided at the upper end of the main frame L, the upper chain gear device is attached to the main frame L in close proximity to the 3-piece machine room, and D is the main frame The lower chain gear device attached to the lower end of l! A step chain is wound endlessly between the upper and lower chain gear devices 3.4E, and a large number of steps 6 are successively attached to this step chain 3. t is a drive device installed in the machine room, and is composed of an electric motor S and a reducer 9, and the rotating shaft fa of the electric motor t and the input shaft 98 of the reducer are linked by a wrap transmission mechanism IO. At the same time, a chain l- is wound between the drive sprocket (fixed to the output shaft 9b of the reducer 9) // and the driven sprocket 38 of the upper chain gear device 3, and 90 rotations of the reducer are transmitted to the upper chain gear device 3. By transmitting the signal, the steps 6 including the step chain 3 are made to run.

The speed of the drive device as described above is generally fixed;
The speed of increase/decrease is determined by the starting torque of the electric motor and the inertia of the system.

In addition, in recent years, S
Passenger conveyors are emerging that can be switched to two speeds.

The speed of this type of passenger conveyor drive is changed by changing the number of poles of the electric motor. Horomiba 40 vs.
/- When operating, there are 6 poles, and when operating at 30 m/m, there are 8 poles.

[Problem that the invention seeks to solve]

However, as mentioned above, in a drive device in which the speed of the passenger conveyor is fixed at one stage, it is possible to slowly increase or decelerate the passenger conveyor by installing a large flywheel, etc. The equipment has become larger, and it has been difficult to freely convert acceleration and deceleration.

In addition, when changing the speed of a passenger conveyor with two speeds, it is necessary to stop the passenger conveyor, change the number of poles of the motor, and then restart it. Not only does it stop the system, but it also consumes a lot of power when starting up. Moreover, as the number of poles increases, the size of the motor becomes larger, and in some cases it cannot be accommodated in one normal main frame.

This invention was made in order to solve the above-mentioned problems, and it makes it possible to control the slow start, slow stop, and slow speed change of a passenger conveyor using a belt-type continuously variable transmission means, which takes up a small space and is economical. The purpose is to provide a driving device for a passenger conveyor.

[Means for solving problems]

The passenger conveyor drive device according to the present invention connects the rotating shaft of the electric motor and the input shaft of the reducer that drives the step chain to a belt-type continuously variable transmission [IK]. The control means is provided to increase or decrease the effective diameter of the V-pulley according to the slow start, slow stop, and slow change of the passenger conveyor.

[Effect]

In this invention, when a command corresponding to slow start, slow stop, or slow speed change is given to the #i1 operating means, the diameter of the pulley increases according to the above command, but L〈 decreases, thereby transmitting the signal from the electric motor to the reducer. To enable slow speed change control of a passenger conveyor by steplessly and smoothly changing the rotation speed of the passenger conveyor.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

1 and 2 show details of the passenger conveyor drive device according to the present invention. The drive device installed in the machine room of the main frame is equipped with an electric motor S and a reduction gear 9. A belt-type continuously variable transmission device 13 connects the rotating shaft ta of the motor and the input shaft 98 of the reducer t, thereby changing the speed of the rotation of the electric motor t and transmitting the same to the reducer D. In addition, a chain /J is wound around the drive sprocket (fixed to the output shaft qb of the reducer t) // and the driven sprocket 3aMK of the upper chain gear device 3, and the output side rotation of the reducer 9 is controlled by the chain gear device 3. Step 6 by transmitting to Step 3
It is designed to run the step chain 3 including the.

As shown in FIGS. 1 and 2, the belt type continuously variable transmission 13 includes V-boots IJ/II with variable effective diameters, which are attached to the rotating shaft &a of the electric motor S and the input shaft 9a of the reducer 90, respectively. , /j, and each v-pulley/l
as well as/! are a pair of conical pulleys/da r that are movable in the axial direction of each rotation axis ta or input shaft 9a.
/4' b, /ja, /jb and 4CSV pulley /4! , /, VC is wrapped with an endless V bell) /A. Also, one of the opposing conical pulleys /l of the V pulleys lda and lS
Between the boss parts of Ia and /ja.

And between the boss parts of the other conical pulley /44b and /jb,
First and second links whose respective intermediate portions are horizontally rotatable about a pivot axis /gK /9. - 〇 are connected to each other, and each link/9° - 〇 is connected to each boss portion, and the connecting end thereof is engaged with the boss portion so as to be relatively rotatable.

and each first and second link/? , -0 are provided with swingable pole nuts l, -1 facing each other on the reducer input shaft 9a side, and ball screws 3 are screwed into each ball nut l, -1. , the threaded portions of the ball screw 23 into which the pole nuts 1 and 1 are screwed have opposite leads to each other, and the ball screws 3 and 3 have opposite leads.
One end is directly connected to the speed change servo motor, and the other end is supported by the bracket 3.

Further, the roller is an electromagnetic brake provided on the other side of the input shaft 9a of the reducer 9.

FIG. 3 shows a control block diagram of the servo motor, in which a command signal generating section 1 generates command signals for slow start, slow stop and slow speed change. The number of pulses sent to the servo motor cock according to
The control unit that controls the ball screw feed rate) and pulse frequency (ball screw feed rate), the set pulse number (feed rate) from the control unit, and the feed rate of the ball screw 3 according to the rotation of the servo motor. A calculation unit 9 calculates the difference between the pulses from the pulse generator t that detects the pulse generator t, and D converts the difference output from the calculation unit t, that is, the set pulse frequency (feeding speed), into a voltage proportional to this difference. -A converter 30
and 3 calculation units that calculate the difference between the output voltage from the D-A converter 30, that is, the feed speed setting voltage, and the output voltage from the tachometer generator 31 that detects the voltage proportional to the rotation speed of the servo motor cock. , and an amplifier 33 for amplifying the differential voltage from the calculation section 3-.

Furthermore, FIG. 4 is a characteristic diagram showing the relationship between the number of pulses (ball screw feed rate) and passenger conveyor speed in this invention, and FIG. 5 is a characteristic diagram showing the relationship between pulse frequency (ball screw feed rate) and passenger conveyor speed in this invention. FIG. 3 is a characteristic diagram showing this relationship.

Next, the operation of this embodiment configured as described above will be explained.

When starting the passenger conveyor slowly, first set the effective diameter φ, of the V-pulley lder on the motor side to 1, for example, φ, = l 0 so that the passenger conveyor can be started at low speed.
Qssi and the effective diameter φ of the V-pulley 13 on the reduction gear side are set to 9, for example, φ, =720-, and the gear ratios are set to 1, 1 near, and 2, respectively. When the electric motor S is started in such a state, the rotation of the first electric motor S is decelerated according to the above-mentioned gear ratio and transmitted to the speed reducer 9, and the first step chain 31, that is, the passenger conveyor 2 is started at a low speed of, for example, 7.51 m1.

On the other hand, when the passenger conveyor is started, a command signal for slow startup is sent from the generation part Kok to the control part Koku, and the control part Kok sends a command signal to bring the passenger conveyor from the low speed state at startup to normal speed operation. A speed changing pulse whose frequency gradually increases over time is output. The number and frequency of these pulses are controlled according to the characteristic diagrams shown in FIGS. 4 and 5.

Here, the total number of pulses is the feed amount of ball screw 3.

In other words, the maximum operating speed of the passenger conveyor is set, and by controlling the pulse frequency in the direction of increasing it, the feed speed of the ball screw 3 is increased, that is, the acceleration of the passenger conveyor is kept constant. K so that linear speed increase control is performed.

Therefore, the command pulse corresponding to the above-mentioned slow start is transmitted from the control section to the calculation section. , D-A converter 30. When applied to the servo motor cock through the three calculation units and the amplifier 33, the servo motor cock is rotated according to the command value, rotating one ball screw 3 in the same direction and one ball nut /
, - to move each link in the direction away from each other/9
．． - 〇 is the pivot axis, and arrow A in Figure 1 is centered on 7g.
.

Rotate in direction B. For this reason, the electric motor tmv Boo'J/
The effective diameter of l changes in the increasing direction, and the effective diameter of the V-pulley/3 on the reducer 9 side changes in the decreasing direction. According to this change in both effective diameters, the rotational speed transmitted from the electric motor t to the reducer d gradually increases, and at the same time, the traveling speed of the passenger conveyor increases to the normal operating speed. When the speed of the passenger conveyor reaches the set value 1, for example, 3011/-, the pulse from the control unit stops and the 1 servo motor also stops, and V It will be operated at a constant speed (30*/m) set by the effective diameter ratio of the pulleys lt and 13. That is,
The passenger conveyor is operated by a servo motor to change the speed of the belt-type continuously variable transmission 13 in the direction of increasing speed.
This means that the vehicle was started slowly from the starting speed of - to the normal speed of 30 m and 7 m.

In addition, in the above-mentioned slow start control, pulses generated from the pulse generator S in proportion to the feed amount of the ball screw 3 are fed back to the calculation unit 9, so that they are sequentially subtracted from the total number of pulses, and the pulses are sequentially subtracted from the total number of pulses. The feed amount is controlled to be the set value. In addition, the voltage proportional to the feed speed of the ball screw J23 detected by the tacho generator 31 is fed back to the three calculation units, and the set voltage from the D-A conversion unit 30 is applied to the servo motor so that this difference is always Vc0. control.

Next, a case will be described in which the passenger conveyor in operation is slowly stopped.

Normal speed 9 For example, when a passenger conveyor operating at 3011/- is to be slowly stopped, a command signal for slow stopping is given from the generator roller to the control section. Outputs gradually decreasing pulses. The pulses set in this way are used in the feed amount control calculation section 9, the D-A conversion section 30. When applied to the servo motor through the three speed control calculation units and the amplifier 33, the servo motor is rotated according to the command value, rotates the ball screw 3 in the same direction, and also rotates the ball nut 3 in the same direction. move them closer to each other,
Each link/9. - Rotate around lt in the direction opposite to arrows A and B in FIG. 1 using 〇 as the pivot axis/. Therefore, the effective diameter of the electric motor t@V pulley ldar changes in the decreasing direction, and the effective diameter of the V pulley/3 on the LS reduction gear 9 side changes in the increasing direction. According to this change in both effective diameters, the rotational speed transmitted from the electric motor t to the reducer t gradually decreases L1, and at the same time, the traveling speed of the passenger conveyor is gradually decreased from the normal operating speed. When the speed of the passenger conveyor reaches a stoppable low speed 1, for example 7.5 m, /wig, the pulse from the control unit stops and the servo motor also stops. After that, when a stop command is given to the drive device 7, the electric motor S will stop, and the passenger conveyor will also stop. In other words, the passenger conveyor is brought to a slow stop.

When changing the running speed of the passenger conveyor during its operation 1. For example, when converting the speed from 530 m/m to 40 m/m or vice versa, give the Fi-speed conversion command from the generating section 6 to the control section Koku. The number of pulses is controlled by K to drive the servo motor cock, and the frequency of one pulse is increased or decreased to change the effective diameter ratio of the V pulleys lt and 13 on the motor and reduction gear side, thereby increasing or decreasing the conversion. To smoothly and slowly change a passenger conveyor to a specified speed by controlling the speed.

This means that when switching the operating speed of a single passenger conveyor from 30 m/m to 4 Q/m or vice versa,
There is no shock when switching speeds like in the past, and speeds can be changed even when transporting passengers.

Note that the belt type continuously variable transmission 13 in this invention is not limited to the structure shown in the above embodiment. For example, the V-pulleys /l, /j and their operating link mechanisms may have different structures, or one servo motor may be replaced with a pulse motor. Moreover, the effective diameter of the v-pulley lt, 13 may be changed.

〔Effect of the invention〕

As described above, 1. According to the present invention, the rotating shaft of the electric motor and the input shaft of the reducer are linked by a belt-type continuously variable transmission,
Then, the effective diameter of at least one of the motor and reducer side V-pulley of this belt type continuously variable transmission device is made variable, and the effective diameter of this is increased or decreased by a control means, so that the passenger conveyor can be slowly started, slowly stopped, and slowly changed speed. As a result, it is possible to realize slow start, slow stop, and slow speed change control of the passenger conveyor using low-cost means, and the acceleration/deceleration control can be performed easily and smoothly. It can be done.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a passenger conveyor drive device according to the present invention, FIG. 2 is a side view taken along the line ■-■ in FIG. 1, and FIG. figure,
Fig. 4 is a diagram showing the relationship between passenger conveyor speed and pulse number, Fig. 5 is a diagram showing this relationship between passenger conveyor acceleration and pulse frequency, Fig. 6 is a schematic side view of a conventional passenger conveyor, and Fig. 7 is a conventional It is a top view of the passenger conveyor drive device in FIG. l...Main frame, K...Machine room, 3,4I...Chain gear mechanism,! ...Step chain, 6...Step, Ri...Drive device, S...Electric motor, fa...Rotating shaft, ? ...Reducer, 9a...Input shaft, 13...Belt type continuously variable transmission, /41, /! ! ...V pulley, /6...V
Belt, /9. , IO... link, col. -1...Pole nut, J...Ball screw, -D...Servo motor. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (3)

[Claims] (1) An electric motor, a reduction gear driven by the electric motor, a chain gear device driven by the reduction gear to run a step chain, and an electric motor and a reduction gear connected between the rotating shaft of the electric motor and the input shaft of the reduction gear. A belt-type continuously variable transmission device in which the effective diameter of at least one of the side V-pulleys is variable, and the effective diameter of the V-pulley of this belt-type continuously variable transmission device is adjusted according to the slow start, slow stop, and slow speed change of the passenger conveyor. A driving device for a passenger conveyor, characterized in that it is comprised of a control means for increasing and decreasing the number of conveyors. (2) A belt-type continuously variable transmission is attached to a motor rotation shaft and a reducer input shaft, and includes a V-pulley with a variable effective diameter, a V-belt wound between these two V-pulleys, and a V-pulley that is wound between the two V-pulleys. The present invention is characterized by comprising a link that relatively increases or decreases the effective diameter of the link, a feed screw that rotates the link, and a servo motor that drives this feed screw in response to slow start, slow stop, and slow speed change commands. A driving device for a passenger conveyor according to claim 1. (3) the number of pulses sent to the servo motor by the control means;
3. The passenger conveyor drive device according to claim 1, wherein the passenger conveyor is slowly started, slowly stopped, and slowly changed speed by controlling the pulse frequency.