JP2002160881A - Passenger conveyor equipment - Google Patents

Abstract

(57) [Problem] To provide a passenger conveyor device having a plurality of drive devices having drive motors having different capacities and capable of smoothly operating at startup and braking. SOLUTION: A main frame 1 is provided with a transport band 4 connecting a large number of tread plates 4, and a plurality of driving devices 7, 14 for driving the transport band 4 are provided on the main frame 1. Further, drive motors 12 having different capacities are provided in each of the drive devices 7 and 14,
Also provided is a flywheel 13 having a moment of inertia to level the acceleration of the drive. As a result, when the passenger conveyor is started or braked, it is generated based on irregularity of the starting characteristics between the driving devices 7 and 14, and a large tension or compression force acts on the transport belt 4 to cause vibration and noise. To prevent from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger conveyor device such as an escalator, a moving walkway, or the like, in which an endless transport band connecting a number of treads is circulated in a main frame.

[0002]

2. Description of the Related Art FIG. 5 and FIG.
FIG. 14 is a diagram showing a conventional passenger conveyor device disclosed in Japanese Patent Application Publication No. 1420, FIG. 5 is a side view conceptually showing, and FIG.
It is a part enlarged view. In the figure, 1 is a main frame of a passenger conveyor composed of an escalator, 2 is a balustrade standing upright at an edge along the length of the main frame 1, 3 is a transport band, and a tread plate 4 composed of a number of steps is a toothed link. 5 are connected to each other by a tread plate chain 6 which is formed endlessly, and circulates along a predetermined path in the main frame 1.

[0003] Reference numeral 7 denotes a first driving device, which is provided near the upper end of the main frame 1 and is disposed between the forward side and the return side of the transport belt 3.
A transmission band 8, which is formed endlessly by a roller chain and meshes with the teeth of the toothed link 5 on the forward and return sides of the transport band 3, respectively; a chain gear 9 around which the transmission band 8 is wound and disposed apart from each other; A speed reducer 10 that transmits power to the chain gear 9, a drive motor 12 that drives the speed reducer 10 via a V-belt 11, and a flywheel 13 provided on an output shaft of the drive motor 12 are provided.

[0004] Reference numeral 14 denotes a second driving device, which is constructed in the same manner as the first driving device 7 and is provided near the lower end of the main frame 1, and is engaged with the transport belt 3 similarly to the first driving device 7. In addition, the flywheel 13 is provided in each of the first drive device 7 and the second drive device 14 in order to obtain an inertia moment required for avoiding a sudden stop during a normal stop of the passenger conveyor.

[0005] The conventional passenger conveyor device is constructed as described above, and when the passenger conveyor is operated, the transport belt 3 is driven by both the first driving device 7 and the second driving device 14 to move the tread plate 4 to the main frame. 1 circulates along a predetermined route. Then, the passenger gets into the tread plate 4 from the entrance provided at one end of the longitudinal direction of the main frame 1 and is transported to the entrance provided at the other end.

Further, each of the drive motors 12
Is determined in accordance with the assumed riding rate of the passengers and the load such as the floor height of the escalator. If the total capacity of the two drive motors 12 does not exceed the required power determined based on the passenger entry rate or the like, the capacity of the power supply equipment can be reduced,
This is advantageous in terms of equipment costs and the like.

[0007] The braking torque of the brakes provided in each of the above two vehicles is also determined in accordance with the assumed riding rate of the passenger and the load such as the floor height of the escalator. That is, the minimum value of the total torque of the braking torque in each of the two is determined. In addition, in order to obtain a required stopping distance when braking the passenger conveyor, the inertia moment of the flywheel 13 in each of the above two cases is determined according to the aforementioned braking torque.

In the case where both of the above, that is, a plurality of driving devices are provided, the respective driving motors 1 are provided.
2. Generally, a brake (not shown) and a flywheel 13 are unitized to have the same specifications and are equipped as a so-called drive unit. Accordingly, the acceleration and braking characteristics in each of the above two are naturally the same.

[0009]

In the conventional passenger conveyor device as described above, when the required power of the passenger conveyor is, for example, 8 kw, the above two devices are provided, and the capacity of each drive motor 12 is 5.5 kW. And 3.7 kw for a total of 9.2 kw. At this time, there is an effect that the power supply capacity at the installation location of the passenger conveyor can be reduced as compared with the case where two drive motors 12 having a capacity of 5.5 kw are provided. However, if the capacities of the drive motors 12 are different, the respective starting torques are different. For this reason, for example, when the passenger conveyor is started, an imbalance of the starting torque may occur between the two.

[0010] Since both of the above are engaged with the transport belt 3, when an imbalance in the starting torque occurs, the transport belt 3 becomes inoperable.
In some cases, a large tension or compression force acts on the device, causing vibration and noise. Such vibrations and noises may also occur during braking of the passenger conveyor.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and has a configuration in which a plurality of driving devices provided with driving motors having different capacities are provided.
An object of the present invention is to provide a passenger conveyor device that can operate smoothly during braking.

[0012]

SUMMARY OF THE INVENTION In a passenger conveyor device according to the present invention, a plurality of treads are connected to each other to form an endless, conveyer belt which circulates in a main frame, and is provided on the main frame. A plurality of driving devices each of which is engaged with the transport band and drives the transport band, a driving motor provided in each of these driving devices and having a different capacity from each other, and a plurality of driving devices provided in the driving device. And a flywheel having a moment of inertia to level the acceleration characteristics.

Further, in the passenger conveyor device according to the present invention, a number of tread plates are connected to each other to form an endless shape, and a transport band circulating and moving within the main frame. A plurality of driving devices that are engaged to drive the transport belt, a driving motor provided in each of these driving devices and having a different capacity, and a moment of inertia of each of the driving devices provided in each of the driving devices. And a brake having a braking torque for leveling a braking characteristic based on the braking force.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 4 show an example of an embodiment of the present invention. FIG. 1 is a graph showing the relationship between the rotation speed of a driving motor and an output shaft torque.
Is a graph showing the relationship between the rotational acceleration of the drive motor of FIG. 1 and the acceleration torque at the time of starting, FIG. 3 is a graph showing the relationship between the rotational deceleration of the drive motor of FIG. 1 and the deceleration torque at the time of braking, and FIG. FIG. 2 is a perspective view of the mounted drive motor of FIG. 1.

The passenger conveyor apparatus is configured in the same manner as in FIGS. 5 and 6 except for FIGS. In the drawing, reference numeral 12 denotes a drive motor of the first drive device 7 or the second drive device 14 described above, and reference numeral 13 denotes a flywheel provided on the drive motor 12 of the first drive device 7 or the second drive device 14.

In FIG. 1, Ts (n1) and Ts (n
2) is the starting torque of the driving motors n1 and n2 having different capacities from each other. The driving motor having a larger capacity has a larger starting torque. TL is a loss torque such as friction in the driving device, that is, a load torque. The torque Ta (n) for accelerating the rotation of the driving device is obtained by subtracting the loss torque from the output torque of the driving motor.

The acceleration torques of the driving device n1 and the driving device n2 at the time of starting are given by the following equations (1) and (2).

(Equation 1)

(Equation 2) In the case of the example shown in FIG. 1, Ta (n1)> Ta (n
2).

In FIG. 2, there is the following equation 3 between the acceleration torque Ta (n) of the drive unit and the rotational acceleration (dω / dt) of the drive motor.

(Equation 3) Where J: Moment of inertia at the drive motor shaft

Thus, the rotational acceleration of the drive motor increases as the acceleration torque increases. When the moment of inertia J increases, dω / dt decreases, and the graph tilts toward A. When the inertia moment J decreases, dω / dt increases, and the graph tilts toward B. In the example shown in FIG. 2, since the capacity of the drive motor is different, the moment of inertia of the rotor is different and the slope of the graph is different.

Further, since the starting torque is also different, the rotational acceleration is also different. From such a situation, for example, the moment of inertia of the driving device n1 is increased so as to be as shown by the dashed line in FIG. 2, or the loss torque of the driving device n1 is increased and the acceleration torque becomes T′a (n1). By doing so, the rotational acceleration at the time of startup can be made equal to α (n2).

Further, in FIG. 3, braking torque + loss torque at the time of a braking operation of a brake provided in the driving device,
That is, there is also a relationship expressed by the following equation 4 between the deceleration torque Tg (n) and the rotation deceleration (dω / dt) of the drive motor.

(Equation 4) Where J: Moment of inertia at the drive motor shaft

Thus, the larger the braking torque is, the larger the rotation deceleration of the drive motor is. When the moment of inertia J increases, dω / dt decreases, and the graph tilts toward C. When the moment of inertia J decreases, dω / dt increases, and the graph tilts toward D. In the example shown in FIG. 3, since the capacity of the driving motor is different, the inertia moment of the rotor is different and the inclination of the graph is different.

From such a situation, for example, the driving device n2
Is increased, and the braking torque of the drive device n2 is increased so that the deceleration torque becomes T'b (n2), whereby the rotation deceleration during braking can be made equal to α (n1). . Therefore, even when the drive motors have different capacities, the rotational acceleration and the deceleration at the time of startup and braking can be made the same for each drive device.

Thus, when the passenger conveyor starts up,
A malfunction that occurs during braking due to activation between the respective driving devices and irregularities in the braking characteristics, that is, a large tension or a compressive force acts on the transport belt 3 and the transport belt 3 or the first driving device 7,
It is possible to prevent a problem that an unreasonable load acts on the transmission band 8 of the second drive device 14 to shorten the life. Also,
The cause of vibration and noise can be eliminated.

In order to correct irregularities in the rotational acceleration and deceleration at the time of start-up and braking in each of the first drive device 7 and the second drive device 14 having different drive motor capacities depending on the device configuration described above. In addition, a flywheel 13 having a different moment of inertia is provided. As described below, a flywheel 13 is provided for each of the driving devices as a specific example of correcting the irregularity. That is, in FIG.

The capacity of the drive motor 12 of the first drive device 7:
3.7kw, 4P Specifications of the flywheel 13: diameter D 300mm thickness A 30mm Capacity of the driving motor 12 of the second driving device 14: 5.5kw,
Specifications of 4P flywheel 13: diameter D 300mm thickness A 37mm

Embodiment 2 FIG. The specifications of the flywheel 13 can be set as described below with respect to the first embodiment. That is, the total moment of inertia of the rotating part of the drive motor of the drive unit alone is J, the angular velocity is ω,
If the time is t, the starting torque is Ts, and the loss torque of the driving device on the rotating shaft of the drive motor is TL, the rotational acceleration at the time of starting is represented by the following equation 5.

(Equation 5)

In equation (5), the starting torque Ts is determined by the capacity of the driving motor. J is the moment of inertia of equipment such as the rotor of the drive motor, flywheel, and other reduction gears, and is determined by the capacity of the drive motor and the size of the flywheel. The other devices such as the speed reducer are constant, since they are the same. Further, the loss torque TL is also a constant value because it is caused by a speed reducer or the like.

The moment of inertia of the drive motor is expressed as Jm
(N), assuming that the moment of inertia of the flywheel is Jf (n) and the moment of inertia of other devices such as a speed reducer is J ′, n
The moment of inertia J (n) of the th drive is given by the following equation (6).

(Equation 6)

From Expression 6, the rotational acceleration at the time of starting the n-th driving device is expressed by Expression 7 below.

(Equation 7) Then, according to Equation 7, in order to make the rotational acceleration at the time of startup of each drive device the same, according to Equation 7,

(Equation 8) J (1), J (2)... J (N) may be determined so that

When all the moments of inertia other than the transport band 3 consisting of the above-mentioned tread plate 4 and tread plate chain 6 are Jtot, when there are N driving devices, the inertial moment of the n-th driving device is as follows. Equation 9 may be used.

(Equation 9)

Therefore, according to Equations 6 and 9, the moment of inertia of the flywheel of the nth drive can be determined by the following Equation 10.

(Equation 10) By setting in this way, it is selected that the total capacity of the drive motor exceeds the required power at a minimum,
Various types of drive motors having different capacities can be mixed.

As a result, the power supply capacity of the passenger conveyor can be minimized. Further, the moment of inertia of the flywheel provided in each drive device is determined so that the rotational acceleration of each drive motor is the same. As a result, it is possible to solve the problem that occurs when the passenger conveyor is started due to the irregularity of the starting characteristics between the respective driving devices. Therefore, although detailed description is omitted, in the second embodiment, substantially the same operation as in the first embodiment can be obtained when the passenger conveyor is activated.

The values of TL and J 'are Ts
(N) and Jm (n) can be ignored as they are smaller than Jm (n) and can be determined as the following Expression 11.

[Equation 11]

Embodiment 3 FIG. In addition, the deceleration at the time of braking of the drive device alone is given by the following equation 12 when the braking torque is Tb.

(Equation 12)

In equation (12), TL is the same for all the drive units. However, when the drive motor and flywheel are selected as described above, the moment of inertia J may differ for each drive unit. For this reason, if the braking torque of the brake is equally distributed to the respective driving devices as in the related art, the deceleration is different, and an imbalance occurs when the passenger conveyor is braked. As a result, an excessive tension and an excessive compression force acting on the tread plate chain 6 may cause an impact.

Therefore, even in such a case, by setting the deceleration of all the driving devices to be the same, the tread plate chain 6
Can be eliminated. That is, n
The rotation deceleration at the time of braking of the second driving device is represented by the following Expression 13.

(Equation 13)

Therefore, in order to make the rotation deceleration during braking the same for all the driving devices, Tb (1), Tb (2),. Thereby, a required action can be obtained.

[Equation 14]

When the required total braking torque is Tbtot, and there are N driving devices, the braking torque of the nth driving device can be determined by the following equation (15).

(Equation 15)

By setting as described above, it is possible to select such that the total capacity of the drive motors exceeds the required power at a minimum, and to use various kinds of drive motors having different capacities. Thereby, the power supply capacity of the passenger conveyor can be minimized. Further, the braking torque of the brake provided in each drive device is determined so that the rotation deceleration of each drive motor is the same.

Therefore, it is possible to eliminate the problem that occurs when the passenger conveyor is braked due to the imbalance in the braking characteristics between the respective driving devices. Therefore, although detailed description is omitted, in the third embodiment, substantially the same operation as in the first embodiment can be obtained when braking the passenger conveyor.

Since the value of TL is smaller than Tb (n), it can be ignored and determined by the following equation (16).

(Equation 16)

[0043]

As described above, according to the present invention, a plurality of treads are connected to each other to form an endless, conveyer belt which circulates in the main frame, and a conveyer band provided on the main frame and associated with each conveyer band. A plurality of driving devices that are combined to drive the transport belt; a driving motor that is provided in each of these driving devices and has a different capacity; and a driving device that is provided with the driving devices and equalizes the acceleration characteristics of the plurality of driving devices. And a flywheel having a moment of inertia.

As a result, at the start of the passenger conveyor, a problem occurs due to the irregularity of the starting characteristics between the respective driving devices, that is, a problem that a large tension or compression force acts on the transport belt and causes vibration and noise. This has the effect of preventing the occurrence beforehand.

Further, as described above, the present invention relates to a transport belt which is connected to a plurality of tread plates and is endless and circulates in the main frame, and a transport belt provided on the main frame and associated with the transport belt. Combined, a plurality of driving devices for driving the transport band, a driving motor provided in each of these driving devices and having different capacities, and provided in each of the driving devices, the moment of inertia of each of the driving devices. And a brake having a braking torque for leveling braking characteristics based on the braking force.

As a result, when the passenger conveyor is braked, a malfunction occurs due to an uneven braking characteristic between the respective driving devices, that is, a large tension or a compressive force acts on the transport belt to cause vibration and noise. This has the effect of preventing the occurrence beforehand.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a first embodiment of the present invention, and is a graph illustrating a relationship between a rotation speed of a drive motor and an output shaft torque.

FIG. 2 is a graph showing a relationship between a rotational acceleration and an acceleration torque at the time of startup in the drive motor of FIG. 1;

3 is a graph showing the relationship between the rotational deceleration of the drive motor of FIG. 1 and the deceleration torque during braking.

FIG. 4 is a perspective view of the drive motor of FIG. 1 with a flywheel mounted thereon.

FIG. 5 is a side view conceptually showing a conventional passenger conveyor device.

FIG. 6 is an enlarged view of a portion A in FIG. 5;

[Explanation of symbols]

1 main frame, 3 transport belt, 4 tread plate, 7
1st drive device (drive device), 12 drive motors,
13 flywheel, 14 second drive (drive).

Claims (2)

[Claims] A plurality of tread plates connected to each other to form an endless transport belt which circulates and moves within the main frame; and a plurality of tread plate members provided on the main frame and respectively engaged with the transport belt. A plurality of driving devices to be driven, a driving motor provided in each of these driving devices and having different capacities, and a moment of inertia provided in the driving device for equalizing acceleration characteristics of the plurality of driving devices. Conveyor conveyor device with a flywheel. 2. A transport belt which is connected to a plurality of tread plates and is endless and circulates in a main frame; and a transport belt provided on the main frame and engaged with the transport belt, respectively. A plurality of driving devices to be driven; a driving motor provided in each of these driving devices and having a different capacity; and a braking characteristic provided in each of the driving devices and based on the moment of inertia of each of the driving devices. A passenger conveyor device comprising: a brake having a braking torque to be changed.