JP7180709B2 - elevator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator capable of shortening flight time by accelerating the start of running of a car from an opening command to brake means.

An elevator is provided with a brake release detection unit that detects that the brake means is in the released state in order to drive the motor with the brake means engaged and prevent the car from running (see, for example, Patent Document 1 reference).

Japanese Patent Application Laid-Open No. 2004-210423

After receiving the release command from the brake release detector, the control means for controlling the running of the car transmits a start command and a control command for speed up to the drive means (motor). As a result, it is possible to reliably prevent the car from starting to travel due to the drive means being driven while the brake means is engaged. However, due to the response delay of the system, it takes time from receiving the opening command and starting the start command and speed-up control until the speed of the car actually starts up, leading to an increase in flight time.

In order to shorten the flight time, the time from the release command to the brake means until the brake means actually releases the braking force, that is, the brake release delay time is regarded as constant, and a certain time after the brake release command is transmitted. It is conceivable to initiate a start command or speed ramp control. However, the brake release delay time varies depending on the installation environment of the elevator, deterioration over time, and the like. If the brake release delay time becomes long, the vehicle starts running before the braking force is completely released.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an elevator capable of shortening the flight time by advancing the start of running of the car from the release command to the brake means.

The elevator of the present invention is
a driving means for hoisting or lowering the rope that suspends and supports the car;
a drive control unit that controls the drive means;
braking means for applying a braking force to the driving means;
a brake release detection unit that detects opening of the brake means;
a control means electrically connected to the drive control section, the brake means, and the brake release detection section;
an elevator comprising
The control means is
a control unit that transmits an opening command to the brake means, receives a release detection signal for detecting the release of the brake means from the brake release detection unit, and transmits a start command to the drive control unit;
a measuring unit that measures a brake release delay time from transmission of the release command to reception of the release detection signal;
a calculation unit that calculates an estimated brake release delay time based on a predetermined number of brake release delay times measured by the measurement unit;
has
After transmission of the brake release command, the control unit transmits the start command to the drive control unit before the estimated brake release delay time calculated by the calculation unit elapses. The release of power and the timing of driving the driving means are aligned.

The brake release delay time may be an average value or a maximum value of the brake release delay times of the predetermined number of times.

The control unit measures or stores in advance a drive delay time from when the drive means receives the start command to when the drive means starts,
The start command is transmitted to the drive control unit so that the estimated brake release delay time and the end of the drive delay time coincide.

Each time the control unit transmits the brake release command, the measurement unit measures the brake release delay time, and the calculation unit calculates the estimated brake release delay time.

According to the elevator of the present invention, the estimated brake release delay time is calculated from the brake release delay time that fluctuates due to the installation environment, deterioration over time, etc., and the start command is transmitted to the drive control unit before the estimated brake release delay time elapses. By doing so, the release of the braking force by the actual braking means, the driving of the driving means, and the start of running of the car can be synchronized with each other, thereby preventing delay in response. As a result, it is possible to prevent abrasion of the brake means, etc., and shorten the flight time.

FIG. 1 is a control block diagram of an elevator according to one embodiment of the present invention. FIG. 2 is a timing chart of elevator control according to one embodiment of the present invention.

An elevator 10 according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a control block diagram showing one embodiment of the elevator 10 of the present invention, showing only the essential parts related to the control of the present invention. The illustrated elevator 10 is a traction-type elevator, and comprises a car 20 in which a user rides and a counterweight 21 suspended by a main rope 23 suspended from a sheave 22 .

The elevator 10 has a driving means 30 such as a motor, and the output shaft of the driving means 30 is connected to the sheave 22 via the brake means 40 so as to be rotatable in both forward and reverse directions. Or lower it. The drive means 30 is controlled to be driven by a drive control section 31 . The drive control unit 31 can be inverter controlled. The drive control unit 31 drives the drive unit 30 upon receiving a starting command from the control unit 50, which will be described later.

The brake means 40 is means for applying a braking force to the rotation of the driving means 30 and the sheaves 22, and applies the braking force to prevent the car 20 from riding up or down while the driving means 30 is stopped. do. As the braking means 40, a disk type electromagnetic brake and a drum type electromagnetic brake can be exemplified. The braking means 40 operates in response to a braking command from the control means 50 to apply a braking force to the driving means 30, and releases the braking force in response to a releasing command.

The brake means 40 has a brake release detector 41 for detecting that the brake means 40 is in the released state. For example, the brake release detection unit 41 directly or indirectly detects separation between the brake shoe and the brake disc, and transmits a release detection signal to the control unit 50 when the brake means 40 is released.

The drive control section 31, the brake means 40 and the brake release detection section 41 are electrically connected to the control means 50 as shown in FIG. The control means 50 can be configured including, for example, a computer such as a CPU (Central Processing Unit), a storage device such as a volatile memory and a non-volatile memory, a clock circuit, and the like. The non-volatile memory is, for example, a flash ROM (Read Only Memory). The non-volatile memory stores in advance a program that causes the control means 50 to execute the control method of the present invention. Volatile memory is, for example, RAM (Random Access Memory). The volatile memory is used by the CPU as a work area when executing the above programs.

The control means 50 includes a control section 51, a measurement section 52, and a calculation section 53 as its functional blocks. These functions are realized by various programs and the like, but FIG. 1 shows only functional blocks related to the present invention among functional blocks related to representative functions realized by these linkages. It should of course be understood that these functional blocks can be realized by hardware only, software only, or a combination thereof.

The control unit 51 transmits a start command to the drive control unit 31 and also transmits a braking command and an opening command to the braking means 40 . The braking means 40 applies a braking force to the driving means 30 according to a braking command, and releases the braking force according to a release command. Further, the control unit 51 receives the release detection signal of the brake means 40 from the brake release detection unit 41 .

The timing at which the control unit 51 transmits the start command to the drive control unit 31 is determined based on the release command transmitted to the braking means 40 and the release detection signal received from the brake release detection unit 41 . In this embodiment, the transmission timing of the start command is changed to the timing of receiving the brake release detection signal so that the car 20 can actually start running by the drive means 30 at the timing when the brake means 40 actually releases the braking force. faster than (see Figure 2).

Specifically, after the control unit 51 transmits the release command to the brake means 40, the brake means 40 actually releases the braking force, and the release is detected by the brake release detection unit 41, and the control unit 51 releases the braking force. There is a brake release delay time until the detection signal is received. This brake release delay time varies depending on the installation environment (temperature, humidity, etc.) of the elevator 10 . The brake release delay time tends to gradually increase due to deterioration over time, etc., and is shortened by maintenance, inspection, parts replacement, and the like.

On the other hand, there is a drive delay time from when the control unit 51 transmits the start command to the drive control unit 31 to when the drive means 30 is actually started and the car 20 is caused to run. Since the drive delay time is constant compared to the brake release delay time, the drive delay time may be actually measured in advance and stored in the storage device. Of course, the drive delay time may also be measured in the same manner as the brake release delay time described below, and an average value or maximum value may be used.

It is desired that the end times of the brake release delay time and the drive delay time be matched as much as possible. When the brake release delay time comes after the drive delay time, the car 20 travels while the braking force is applied, and the brake means 40 wears out. Conversely, if the brake release delay time is earlier than the drive delay time, it becomes an idle time, delaying the start of running of the car 20 and extending the flight time.

Therefore, in the present invention, after transmitting the brake release command, the control unit 15 transmits the start command to the drive control unit 31 before the brake release delay time elapses. Specifically, since the brake release delay time fluctuates, the measurement unit 52 and the calculation unit 53 calculate an estimated brake release delay time by estimating the brake release delay time, and based on the estimated brake release delay time, , determines the transmission timing of the start command.

Since the brake release delay time fluctuates as described above, in this embodiment, it is measured by the measuring unit 52 each time the brake means 40 is released, that is, each time the control unit 51 transmits an release command.

Then, the brake release delay time measured by the measuring section 52 is transmitted to the calculating section 53 . The calculation unit 53 accumulates the received brake release delay time for a predetermined number of times (for example, 10 times to 20 times), calculates the average value or maximum value as the estimated brake release delay time, and calculates the calculated estimated brake release delay time. to the control unit 51 .

The control unit 51 moves the car 20 between floors in response to a landing call or a car call from a state in which the car 20 is stopped, that is, a state in which the braking means 40 applies braking force to the driving means 30. At this time, a brake release command is transmitted to the brake means 40 and a start command is transmitted to the drive control section 31 .

At this time, as shown in the timing chart of FIG. 2, the control unit 51 refers to the estimated brake release delay time and the drive delay time, and transmits the brake release command (t1). At the timing (t3) received by , the driving means 30 increases the rotational speed to start driving, and transmits a start command so that the car 20 runs (t2). As a result, it is possible to align the estimated brake release delay time with the end of the drive delay time measured in advance, so that the speed start-up control can be performed before the estimated brake release delay time elapses.

In this way, taking into consideration the brake release delay time that varies depending on the installation environment of the elevator 10, aging deterioration, etc., the driving means 30 starts driving at the optimum timing, and the car 20 starts running, thereby preventing a response delay. At the same time, it is possible to prevent wear of the brake means 40, etc., and shorten the flight time.

The above description is for the purpose of illustrating the present invention and should not be construed as limiting the invention described in the claims or restricting the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and of course various modifications are possible within the technical scope described in the claims.

10 elevator 20 car 30 drive means 31 drive control unit 40 brake means 41 brake release detection unit 50 control means 51 control unit 52 measurement unit 53 calculation unit

Claims (6)

a driving means for hoisting or lowering the rope that suspends and supports the car;
a drive control unit that controls the drive means;
braking means for applying a braking force to the driving means;
a brake release detection unit that detects opening of the brake means;
a control means electrically connected to the drive control section, the brake means, and the brake release detection section;
with
The control means is
a control unit that transmits an opening command to the brake means, receives a release detection signal for detecting the release of the brake means from the brake release detection unit, and transmits a start command to the drive control unit;
a measuring unit that measures a brake release delay time from transmission of the release command to reception of the release detection signal;
a calculation unit that calculates an estimated brake release delay time based on a predetermined number of brake release delay times measured by the measurement unit;
has
After transmission of the brake release command, the control unit transmits the start command to the drive control unit before the estimated brake release delay time calculated by the calculation unit elapses. aligning the release of the power and the timing of driving the driving means;
is an elevator,
The brake release delay time is an average value or a maximum value of the brake release delay times of the predetermined number of times,
elevator. The control unit measures or stores in advance a drive delay time from when the drive means receives the start command to when the drive means starts,
transmitting the start command to the drive control unit such that the estimated brake release delay time coincides with the end of the drive delay time;
2. Elevator according to claim 1 . Each time the control unit transmits the brake release command, the measurement unit measures the brake release delay time, and the calculation unit calculates an estimated brake release delay time.
The elevator according to claim 1 or 2 . a driving means for hoisting or lowering the rope that suspends and supports the car;
a drive control unit that controls the drive means;
braking means for applying a braking force to the driving means;
a brake release detection unit that detects opening of the brake means;
a control means electrically connected to the drive control section, the brake means, and the brake release detection section;
with
The control means is
a control unit that transmits an opening command to the brake means, receives a release detection signal for detecting the release of the brake means from the brake release detection unit, and transmits a start command to the drive control unit;
a measuring unit that measures a brake release delay time from transmission of the release command to reception of the release detection signal;
a calculation unit that calculates an estimated brake release delay time based on a predetermined number of brake release delay times measured by the measurement unit;
has
After transmission of the brake release command, the control unit transmits the start command to the drive control unit before the estimated brake release delay time calculated by the calculation unit elapses. aligning the release of the power and the timing of driving the driving means;
is an elevator,
The control unit measures or stores in advance a drive delay time from when the drive means receives the start command to when the drive means starts,
transmitting the start command to the drive control unit such that the estimated brake release delay time coincides with the end of the drive delay time;
elevator. Each time the control unit transmits the brake release command, the measurement unit measures the brake release delay time, and the calculation unit calculates an estimated brake release delay time.
5. Elevator according to claim 4. a driving means for hoisting or lowering the rope that suspends and supports the car;
a drive control unit that controls the drive means;
braking means for applying a braking force to the driving means;
a brake release detection unit that detects opening of the brake means;
a control means electrically connected to the drive control section, the brake means, and the brake release detection section;
with
The control means is
a control unit that transmits an opening command to the brake means, receives a release detection signal for detecting the release of the brake means from the brake release detection unit, and transmits a start command to the drive control unit;
a measuring unit that measures a brake release delay time from transmission of the release command to reception of the release detection signal;
a calculation unit that calculates an estimated brake release delay time based on a predetermined number of brake release delay times measured by the measurement unit;
has
After transmission of the brake release command, the control unit transmits the start command to the drive control unit before the estimated brake release delay time calculated by the calculation unit elapses. aligning the release of the power and the timing of driving the driving means;
is an elevator,
Each time the control unit transmits the brake release command, the measurement unit measures the brake release delay time, and the calculation unit calculates an estimated brake release delay time.
elevator.

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