JPH03216477A - Control device for linear motor type elevator - Google Patents

Abstract

PURPOSE:To perform operation with comfortableness in riding by providing a load detecting device on a braking device so as to measure the weight of a cage during stopping and inputting an arithmetic value, obtained by inputting a detection value in accordance with a weight measuring value of the cage to a thrust command generating device, to a driving gear of a linear motor as a thrust command. CONSTITUTION:Since an electromagnet device 10d is deenergized when a cage 2 is placed in a stop condition, suction force to a rod 10r is deenergized, and a guide rail 6 is pressed by a brake shoe 10a by extending force of a compression spring 10b. On the other hand, a load of the cage 2 is a load variable related to a load cell 50 between a bottom part of the cage 2, displaced along a plurality of bolts 10f in a floating condition, and an upper surface of a body 10e. In such a way as mentioned, the load cell 50, which receives the load, inputs an output signal, in accordance with the load of the cage 2, to a thrust command generating device 51 in which a thrust command 51a, in accordance with the load of the cage 2, to be given to a linear motor, is calculated and input to a VVVF device, and a control device 10 is opened after a control command, based on the command 51a, is previously given at the time of starting.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for an elevator that raises and lowers a car driven by a linear motor, and more particularly, to a control device for a braking device for the elevator car. It is something.

[Prior Art] A conventional lobe-type elevator has a car at one end of the rope and a counterweight at the other end, and uses the frictional force between the sheave of the hoist and the lobe stretched around it. A traction system is used to raise and lower the car.

On the other hand, in the case of elevators in skyscrapers, it is necessary to install a very large number of elevators from the viewpoint of improving the operating capacity and service of the elevators, so the above-mentioned traction type elevators reduce the effective usable space of the building.

Therefore, even if a large number of elevators are installed, a so-called one-shaft multicar elevator has been proposed in which a plurality of sets of elevator cars are arranged in a single hoistway and driven by a linear motor.

FIG. 3 is a perspective view showing an example of the configuration of a conventional linear motor elevator. In the figure, (1) is the car hoistway;
(2) is an upper car (hereinafter referred to as a car), (2d) is a lower car that goes up and down directly below car (2), and has the same structure as car (2). (3) is the floor, (2l) is the basket (2
) is provided on the side wall of the car and guides the car (2) along the guide rail (5). The upper guide roller (22) is also a lower guide roller. Note that a guide roller similar to the above is also provided on the guide rail (6) side of the car (2). (10) is a braking device whose details will be described later;
30) is a primary coil of a linear motor disposed in the hoistway (1), which is divided into four parts as shown by (30A) to (30D).

(40) is a permanent magnet that constitutes the secondary side of the linear motor, which is disposed on the side wall of the cage (2) facing the primary coil (30) of the linear motor;
It is divided into four parts as shown in D).

FIG. 4 is a vertical sectional view schematically showing the configuration of FIG. 3, and further shows the connection between the primary coil (30) of the linear motor and the driving inverter device (100). In the inverter device (100), (lot) is a variable voltage variable frequency control device (hereinafter referred to as VVVF device) composed of power transistors, etc., (102) C is a primary coil (30) and a vvVF device (101). The contactor contact (103) is a contact for short-circuiting the primary coil (30).
0) is located between sections (3l) to (3) in the middle of each floor (3).
8), each with an inverter device (10(1)
It is designed to be powered independently from the With this configuration, multiple cars can be controlled independently.

That is, the position of the car (2) is detected, the corresponding sections (31) to (38) are selected, and the inverter device (1) is
00). In addition, VVVF device (1
01) has already been disclosed in, for example, Japanese Unexamined Patent Application Publication No. 170287/1983, so the details will be omitted here.

FIG. 5 is a front view showing the structure of the braking device (10) in FIGS. 3 and 4. FIG. In the figure, (10a) is a compression shoe (tab) provided on each side of the guide rail (8) that presses the brake shoe (10a) against the guide rail (6) via a lever (10c). The spring (led) is an electromagnetic device fixed to the bottom of the car (2), and when energized, it attracts the rod (10r) against the compression spring (10b) and moves the brake shoe (10a) to the release position. Hold.

Next, the operation of the braking device configured as described above will be explained. When a start command is issued, the contact (103) is opened,
Contact (102) is closed. In addition, an electromagnet device (10d
) is energized and the braking device (10) is in the released state. V
The VVF device (101) generates an alternating current of a predetermined voltage and frequency according to a predetermined speed command signal to drive the primary coil (30).
The moving magnetic field generated by this power supply causes the car (2) to
is driven up and down. When reaching the destination floor, the braking device (1
0) stops the car (2), and the contact (103)
is closed and the contact (102) is opened.

Normally, the braking operation of the above braking device (10) is performed by the car (2
) stops at the destination floor, the electromagnet (1 (ld)) is deenergized to hold the car (2) on the guide rail (6).

[Problems to be Solved by the Invention] Compared to elevators with lobes, the linear motor elevator as described above detects the load applied to the hoisting lobes, and the hoisting motor is equipped with a counterweight. It is possible to apply an unbalanced torque to the car in advance and then release the braking device, a so-called "scale start," but in linear motor elevators that do not have ropes to suspend the car, "
If the brake system is released at the same time as the car starts running, the car will move slightly downward under its own weight before running, causing discomfort to passengers.

In order to avoid this drawback, a method may be considered in which the load on the car is measured from the amount of deflection of the anti-vibration rubber on which the car is supported, but this method has problems such as a lack of accuracy.

This invention was made in order to solve the above-mentioned problem, and it is a linear motor that allows passengers to ride comfortably without the car moving downward even if the braking device is released at the same time as the car starts traveling. The purpose is to obtain a control device for a type elevator.

[Means for Solving the Problems] A control device for a linear motor elevator according to the present invention includes a braking device that stops and holds a car by pressing both sides of guide rails that are installed facing each other in a hoistway and guide the car. A load detection device is installed on the top, the weight of the stopped car is measured by this load detection device, and the calculated value obtained by inputting the detected value corresponding to the weighed value of the car to the thrust command generator is calculated. , which is input to the linear motor drive device as a thrust command.

[Operation] In this invention, a thrust corresponding to the weight of the car obtained by the load detection device at the time of starting the car is applied in advance as thrust to the linear motor, and then the braking device is released and the car is started.

[Embodiment] FIGS. 1 and 2 are a plan view and a front view showing the configuration of an embodiment of the present invention.

In FIGS. 1 and 2, parts that are the same as the reference numerals in FIG. 5, which shows the structure of the braking device in the prior art, are the same or equivalent parts, and are arranged opposite to these structures and the guide rail (6). A description of the guide rail (5) side will be omitted.

(10e) is a casing that holds the braking device (10);
Multiple bolts loosely fitted into the through holes drilled in the basket (2)
10f) are screwed together and suspended from the cage (2).

(50) is a load cell fixed on the top surface (10g) of the housing (10e), and its output signal is sent to the conductor (50a).
．． (50b) to the thrust command generator (51), and the output thrust command is the VV shown in FIG.
It is designed to be input to the VF device (101).

Next, the operation of the above embodiment will be explained. When the car (2) is in a stopped state, the electromagnet device (10d
) is demagnetized, so the attraction force on the rod (10r) is deenergized, and the braking shoe (10a) presses the guide rail (6) by the tension force of the compression spring (10b). On the other hand, the load of the car (2) is a load variable applied to the load cell (50) between the bottom of the car (2) and the top surface of the housing (10e), which is displaced along the plurality of loosely fitted bolts (10f). (Guide rail with configuration explanation omitted)
The same load is applied to the load cell on the guide rail (5) side, which is arranged opposite to the guide rail (5).

As described above, the loaded load cell (50) transmits an output signal corresponding to the load of the car (2) to the conductor (50a) (50).
0b) to the thrust command generator (51), where the thrust command (51a) corresponding to the load of the car (2) to be applied to the linear motor is calculated, and the VVV shown in FIG.
The braking device (10) is released after the thrust command (51a) or a control command for the near motor is given in advance to the F device (101) at the time of starting the car (2). This prevents the cage (2) from moving downwards.

[Effects of the Invention] As described above, according to the present invention, there is provided a load cell that receives the dead weight of the car and outputs a signal corresponding to the dead weight when the braking device is activated and the car supporting the guide rail is stopped;
We installed a thrust command generator that receives the output of this load cell and calculates a thrust command to prevent the car from moving downward when the car starts, so even if the braking device is released at the same time as the car starts running. When the car is released, the car does not move downward, and a linear motor elevator that provides a comfortable ride for passengers can be obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the configuration of an embodiment of the present invention, and FIG.
The figure is a front view, Figure 3 is a perspective view showing an example of the configuration of a conventional linear motor elevator, Figure 4 is a vertical sectional view schematically showing the configuration of Figure 3, and Figure 5 is a conventional braking device. FIG. In the figure, (1) is the hoistway, (2) is the car, (5) .
(6) is a guide rail, (lO) is a braking device, (50)
is a load cell (load detection device), (51) is a thrust command generator, (51a) is a thrust command, and (100) is an inverter device. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] Guide rails installed opposite to each other in a hoistway to guide a car, a drive device that drives a linear motor that raises and lowers the car, and pressing both sides of the guide rail to stop the car; A load detecting device installed on the braking device to measure the weight of the car when stopped, and a car receiving the output of the load detecting device to measure the weight of the car when it is stopped. 1. A control device for a linear motor elevator, comprising: a thrust command generating device which calculates a thrust force at the time of starting and inputs the calculation result to the drive device as a thrust command.