JPH04201964A - Braking device for low press elevator - 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] The present invention relates to a ropeless elevator that is installed in a ropeless elevator that lifts and lowers a car without using ropes using the propulsive force of a linear motor, and that brakes the car. The present invention relates to a braking device.

[Prior Art] Section 2 is a block diagram showing a conventional ropeless elevator similar to that shown in, for example, Japanese Utility Model Application Publication No. 62-136476.

In the figure, a large number of primary coils (2) are arranged vertically on the side wall of the hoistway (1), and two rails (3) extending vertically and facing each other are arranged.
) is provided.

A car (4) provided in the hoistway (1) is provided with a plurality of permanent magnets (5), which are secondary magnets, so as to face the secondary coil (2). This permanent magnet (
5) and the negative side coil (2) constitute a linear synchronous motor.

Further, the negative side coil (2) is connected to a variable voltage variable frequency control device (hereinafter abbreviated as VVVF device) (not shown), and the linear synchronous motor is driven by this VVVF device, generating propulsive force. As a result, the car (4) moves up and down between the floors (6) in the hoistway (1). In addition, VV
Regarding the VF device, for example, Japanese Patent Application Laid-Open No. 61-170287
This is shown in the issue of the publication, etc.

Guide rollers (7) that roll along the rails (3) are provided at the center of the upper and lower ends of both side walls of the car (4). At the bottom of the car (4), there is a brake part (
8) is provided.

FIG. 3 is a block diagram specifically showing the brake section (8) of FIG. 2. FIG.

In the figure, brake shoes (9) that sandwich the guide rail (3) from both sides are each fixed to one end of the lever (10). Each lever (10) has a bin (11)
It is mounted rotatably around Gf. Each lever (1
A spring (12 springs) is provided between the other ends of the spring 0).
Due to the pressing force of this spring (12), each brake shoe (9)
is pressed against the guide rail (3).

The other end of each lever (10) is connected to a rod (13). This rod (13) is connected to the electromagnet device (14)
Opposed to 1. And electromagnetic Marsupial! (14) is excited, the rod (13) is attracted, and this causes each lever (1
0) Rotates against the cover spring (12) and each brake shoe (
9) can be separated from the guide rail (3).

Next, the operation will be explained. When the start command signal is input, the electromagnet device (14) is excited and the braking unit (8
) becomes open. The VVVF device generates an alternating current voltage of seven predetermined frequencies according to a predetermined speed command signal, and applies it to the negative side coil (2). As a result, the -next coil (2) is excited and a moving magnetic field is generated, which generates a propulsive force in the linear synchronous motor, and this propulsive force causes the car (4) to be excited.
) moves up and down within the hoistway (]) guided by guide rails (3).

After this, when the car (4) arrives at the destination floor, the braking section (
8) holds and stops the car (4), and the VVVF device de-energizes the primary coil (2).

In this way, the braking unit (8) maintains the stopped state of the car (4) every time the car (4) stops at the destination floor. Also,
When an emergency stop is performed using an emergency stop button or the like, the VVVF device de-energizes the negative side coil (2) and immediately activates the braking section (8) to stop the car (4).

[Problem to be solved by the invention] Conventional ropeless elevator configured as described above.
In the braking device, the braking force F of the braking part (8) is:
It is set so that when an emergency stop occurs while traveling downward at the rated load W, the vehicle can be decelerated and stopped at a predetermined deceleration α, as shown by the following equation.

F, -(WC+WF)X (1+αp/g) However, Wc
The weight of the basket (4), g is the acceleration due to gravity.

On the other hand, the deceleration α of the car (4) when the car (4) is brought to an emergency stop by the braking force F while traveling upward with no load.

is expressed by the following equation.

α*-CWc10Fm> Xg/We = g + < 1 + WF/ WC) X (g+
α,) Usually, W C,−W v, so αm=3g
+2α.

In addition, if an emergency stop occurs while traveling in one direction with the rated load WF, αw = 2 g + 2α, and the deceleration of the car (4) will be at least 2 g or more.

, : In contrast, the deceleration of the passenger in the car (4) is 1 g, so in a conventional ropeless elevator, if an emergency stop is made while traveling upward, the passenger will not be able to move inside the car (4). In the worst case scenario, a passenger could crash into the ceiling of car (4) and fall 17.

This invention was made with the aim of solving the above-mentioned problems, and even if an emergency stop is made while the car is traveling upwards, passengers will not be thrown off the ground, thereby improving safety. The object of the present invention is to obtain a ropeless elevator capable of directing

[Means for solving the problem] A braking device for a ropeless elevator according to the present invention includes:
The car is equipped with a stop detection section that detects the stop of the car, and a control section that receives a stop detection signal from the stop detection section, a braking command signal from the operation control device, and a running direction signal, and is equipped with a stop detection section that detects the stop of the car. If a braking command signal is input while the vehicle is running, the control section operates the braking section after a stop detection signal is input.

[Operation] In the present invention, if a brake command signal is input while the car is traveling upward, the control unit operates the brake unit after the stop detection signal is input. This causes the braking unit to maintain the stopped state of the car.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a braking device for a ropeless elevator according to an embodiment of the present invention.
is similar to the conventional example.

In the figure, the electromagnetic device (14) of the braking unit (8) includes:
A control unit (21) is connected. The control unit (21)
The car (4) is equipped with an operation control device (22) provided on the hoistway (1) side, and a stop of the car (4) (approx.
z/win). As a result, the control unit (21) receives a braking command signal (31) from the operation control device (22), a traveling direction signal (32), and a stop detection signal (33) from the stop detection unit (23). be done.

A control section (21) controls a braking section (8) according to a braking command signal (31). The control unit (21) also outputs a running direction signal (3) indicating that the car (4) is running upward.
2), if the brake command signal (31) is input, the brake part (8) is operated after the stop detection signal (33) is input, and the car (4) is rotated. It is designed to maintain a stopped state.

The braking device (24) of this embodiment is a braking section (8).

It consists of a control section (21) and a stop detection section (23).The stop detection section (23) may be, for example, one equipped with an encoder that detects the rotation of the guide roller (7), or one that uses a laser. A so-called linear encoder or the like can be applied.

In the ropeless elevator having the braking device (24) configured as described above, the car (4) is raised and lowered by the propulsive force of the linear synchronous motor, as in the conventional example. and,
When the elevator (4) stops at the destination floor, a braking command signal (31) and a stop detection signal (33) are input to the control unit (21).

As a result, the control unit (21) operates the brake unit (8), that is, releases the attraction of the rod (13) by the electromagnetic device (14), and causes the brake unit (8) to stop the rod (4). maintain the state. After this, the excitation of the negative side coil (2) is cut off.

In addition, when an emergency stop is caused by an emergency stop button or the like, the excitation of the negative side coil (2) is cut off and the braking command signal (31) is sent from the operation control device (22) to the control unit (21). Output. At this time, if the car (4) is traveling downward, the control section (21) controls the braking section (8).
) is activated immediately to stop the cargo (4) 6 Finally, if the cargo (4) is traveling upward, a brake command signal (31) is input to the control section (21). Then, the control section (21) waits for the stop detection signal (33) from the stop detection section (23) to be input, and then starts the control section (4).
After stopping, the brake part (8) is operated to maintain the stopped state.

Therefore, in the above-mentioned ropeless elevator, even if an emergency stop is made while traveling upward, the deceleration of the car (4) is 1 g, and passengers will not float or collide with the ceiling.

Although it is desirable that the stop detection section (23) detects that the basket (4) has completely stopped, there is no problem in practice even if there is a slight error.

In addition, the power for the braking device (24) may be supplied via a control cable or trolley wire to the cage (4).
Also, with normal power supplies, when making an emergency stop during a power outage,
The brakes are applied immediately even when traveling upwards, so if you do not use a battery such as a rechargeable battery in the braking device (
In preparation for the power source (24), the braking device (24) may be configured to work normally for a while even in the event of a power outage.

Furthermore, the brake part (8) only needs to be able to stop the ladder (4), and its structure is not limited to that shown in FIG. 3.

Furthermore, the positions of the control section (21) and the stop detection section (23) are not particularly limited, and may be on the car (4) side or on the hoistway (1) side.

Furthermore, each of the signals (31), (32), and (33) may be an electrical signal, but may also be, for example, an optical signal.

Further, in the above embodiment, a ropeless elevator using a linear synchronous motor is shown, but other linear motors may be used.

[Effects of the Invention] As explained above, the braking device for a ropeless elevator of the present invention is provided with a stop detection section that detects the stop of a car, and receives a stop detection signal from the stop detection section and a stop detection signal from the operation control device. brake command signal.

The controller is equipped with a control unit into which a running direction signal is input, and if a braking command signal is input while the car is running upward, the control unit operates the brake unit after a stop detection signal is input. Since the system is activated to maintain the stopped state of the car, even if an emergency stop is made while the car is traveling upwards, passengers will not be thrown off the ground, improving safety. play.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing a conventional ropeless elevator, and FIG. 3 is a block diagram showing the braking section of FIG. 2. In the figure, (8) is a brake part, (21) is a control part, and (2) is a brake part.
2) is an operation control device, (23) is a stop detection unit, (24)
is a braking device, (31) is a stop command signal, (32) is a running direction signal, and (33) is a stop detection signal. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A braking unit provided on a car that moves up and down in a hoistway to stop the car, a stop detection unit that detects the stop of the car, a stop detection signal from the stop detection unit, and a braking command signal from an operation control device. , a control section to which a traveling direction signal is input and which controls the braking section according to the braking command signal, and the control section receives the braking command signal when the car is traveling in an upward direction. A braking device for a ropeless elevator, characterized in that when the car is stopped, the braking unit is operated to maintain the stopped state of the car after the stop detection signal is input.