JPH07984U - Variable speed carrier - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To enable reliable fixed position stop control using a dedicated control microcomputer in elevators and the like that use induction motors and mechanical continuously variable transmissions. A variable-speed transport device including a control microcomputer for performing a series of controls for starting each operation of acceleration-high speed-deceleration-slow speed and stopping at a fixed position,
The control microcomputer has a learning-type software program, and in the test mode operation, it is moved up and down based on a predetermined start-up acceleration-high speed-deceleration-slow operation pattern, and future normal operation is based on the design specifications. The most suitable start-up acceleration-high speed-deceleration-slow speed proper acceleration completion signal transmission position required to operate in an operation pattern,
The deceleration start signal transmission position, the deceleration completion signal transmission speed, etc. were calculated, and thereafter, based on the calculated values, normal operation was controlled in the optimum mode of startup acceleration-high speed-deceleration-slow speed in the auto mode.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a variable speed transfer device capable of performing reliable fixed position stop control in an elevator or the like using an induction motor and a mechanical continuously variable transmission by using a dedicated control microcomputer.

[0002]

[Prior art]

 Conventionally, it has been optimal from the viewpoints of performance and control to use a DC motor with drooping output characteristics as the drive motor for variable-speed conveyors (elevators, vertical conveyors, etc.). It is exclusively used in high-speed elevators. However, it is rarely used because it is expensive for general use.

Therefore, an induction motor is generally used as a drive source, and an inverter is inserted in the power wiring to control the speed by frequency conversion.

This system can drive and control the elevating device relatively easily and inexpensively by an inverter and a sequencer which are widely available on the market.

However, in this method, the output torque decreases as the speed decreases.

In particular, the output torque is halved and is unstable at the time of start-up requiring torque, acceleration immediately after start-up, and slow operation immediately before stop.

Therefore, usually, the motor capacity is selected to be large, and the inverter is also made to have a larger capacity. If the torque in the low speed region is still insufficient, the output voltage of the inverter is raised or an overcurrent is temporarily passed. You need to

In order to obtain a stable output torque during slow speed operation, the output frequency of the inverter needs to be about 3 Hz, which limits the top speed and prevents high speed operation.

There are drawbacks such as

Therefore, as a third method, a method has been developed in which an induction motor is used as a drive source, but the speed is changed via a mechanical continuously variable transmission regardless of an inverter.

This mechanical continuously variable transmission has a wide shift range, and its output characteristic is constant horsepower in a range of 1:10 and shows characteristics similar to a DC series-wound motor.

That is, the output torque in the low speed region increases in inverse proportion to the speed, and a stable and considerably large output torque can be obtained even at a speed of 1/10 or less.

Therefore, a stable slow operating speed can be obtained, and the ratio of the top speed can be set to a value twice or more as compared with the case of the inverter drive.

[0014]

[Problems to be solved by the device]

 However, the variable speed transport device according to the third method described above still has the following problems.

That is, the variable speed transfer device of this system has a speed change mechanism that can be remotely controlled by an air cylinder or a variable pilot motor. Since it was necessary to control the delay and overrun when the pilot motor was stopped, such control was extremely difficult.

Therefore, the application of such a speed change mechanism is actually limited, and has not been widely used.

The present invention intends to provide a variable speed transfer device which can solve the above-mentioned problems.

[0018]

[Means for Solving the Problems]

 The present invention, for the purpose of quickly moving a certain distance by loading a person or an object, uses an induction motor as its drive source and a mechanical continuously variable transmission capable of continuously shifting with a pilot actuator for shifting. A variable-speed transport device equipped with a control micro-computer for use, and for performing a series of controls for starting, accelerating, high-speed, decelerating, and slowing each operation to stop at a fixed position. The computer has a learning-type software program, and in the test mode operation, the normal start-up of the future is made the most based on the design specifications by moving up and down based on a predetermined start-up acceleration-high speed-deceleration-slow operation pattern. Appropriate start-up-high speed-deceleration-slow speed The proper acceleration completion signal transmission position, deceleration start signal transmission position, and deceleration completion required for operation in a pattern A variable-speed transfer device characterized in that it calculates the signal transmission speed, etc., and then, based on the calculated value, starts normal operation in auto mode with an optimum operation pattern of acceleration-high speed-deceleration-slow speed. It is related.

In addition, according to the present invention, the control microcomputer may artificially input the acceleration completion signal transmission position, the deceleration start signal transmission position, and the deceleration completion signal transmission speed even if the control microcomputer does not have a learning soft program. It is characterized in that it is a control microcomputer or sequencer that can be operated in the above operation pattern.

Further, the present invention is also characterized in that the control microcomputer can be provided with a function capable of making minor changes to the operating specifications stored in the microcomputer by observing the operating status during normal operation. .

Further, the present invention is also characterized in that the control microcomputer enables control of the operation pattern at a plurality of stop positions on the upper floor and the lower floor.

[0022]

【Example】

 FIG. 1 is a schematic explanatory view of a variable speed transport device according to the present invention, and FIG. 2 is an external view of a control microcontroller MC of a mechanical continuously variable transmission b used to drive the variable speed transport device A.

In the present embodiment, the variable speed transport device is the lifting device A, and as shown in FIG. 1, the lifting basket 1 is suspended in the lifting space Q by the wire rope 2 to provide the two upper and lower positions. I try to stop at a point. Reference numeral 3 denotes a drive unit, and the drive unit 3 includes an induction motor M with a brake for driving the lifting device A and a mechanical continuously variable transmission b connected to the electric motor M. The device b can continuously change gears by a pilot motor PM as a pilot actuator.

As a sensor, an encoder 5 is connected to the output shaft 4 of the mechanical continuously variable transmission b to generate one pulse for every 1 mm of elevation of the elevator cage 1, and this is built into the control microcontroller MC. The current position of the elevator cage 1 can be known by the addition and subtraction performed by a microcomputer (hereinafter referred to as the microcomputer) that performs this operation.

Further, by counting the number of clocks between the pulses of the encoder 5, it is possible to calculate the instantaneous lifting speed.

The ascending / descending stroke, the load, the top speed, the acceleration, etc. are different for each ascending / descending device, but can cover all of them within a practical range.

In FIG. 1, 6 is a counter weight, and MGB is an electromagnetic switchboard.

In FIG. 2, 11 is a numerical display by an LED lamp, 12 is a display select switch, 13 is an input digital switch, 14 is an operation mode selection switch, 15 is an operation switch, 16 is a memory reset switch, and 17 is a connector section. , 18 are power supply connection parts.

Further, the software program of the microcomputer is a self-learning type program, and the technical data required for the operation of the lifting device A as described above is stored in the microcomputer itself even if the engineer does not input the data. It is possible to judge by measuring and calculating.

The operation mode of the lifting device A is divided into (1) manual mode, (2) # 1 test mode, (3) # 2 test mode, and (4) auto mode. Performs one or two test operations in sequence in each of the above modes, and measures the acceleration, top speed, deceleration distance, etc., to determine the acceleration completion signal transmission position, deceleration start signal transmission position, deceleration completion signal transmission speed, etc. Along with the calculation, the obtained data are stored in the microcomputer so that the normal operation is performed in the most preferable starting acceleration-high speed-deceleration-slow operation pattern based on design specifications.

Hereinafter, the above four modes will be described in detail in accordance with the procedure for starting up the operation of the newly installed lifting device.

(1) Manual Mode The elevator basket 1 is moved up and down at a slow speed. There are cases where shock absorbers are provided at the stop positions on the upper and lower floors, respectively, and there are cases where the motors are stopped by detection with a limit switch etc.In both cases, the counter value at the stop position is set in the microcomputer. Store.

The counter value at this time is L _U on the upper floor and L _{D on} the lower floor.

(2) # 1 test mode (see FIG. 3A) This is the acceleration completion signal transmission position (pilot motor forward rotation OFF signal transmission position) and deceleration completion signal transmission speed (pilot motor This is an operation mode in which the microcomputer measures and calculates the reverse rotation OFF signal transmission speed).

When the ascending start is performed, the drive motor M and the pilot motor PM rotate in the forward direction to enter the equal acceleration operation, and 0.3 seconds and 0.8 seconds have elapsed from the start signal, and the respective instantaneous speeds are detected twice. Acceleration is calculated from the data.

From this acceleration and lift (L _U − L _D ) and the overrun time (around 0.3 seconds) of the pilot motor PM, the pilot motor forward rotation OFF signal is set so that the acceleration distance becomes 1 / 2.5 of the lift. The transmission position of is calculated by the microcomputer.

When the elevator cage 1 moves up and reaches this calculation position, a normal rotation OFF signal of the pilot motor is issued to stop the acceleration operation, and the operation is shifted to the constant speed operation at the top speed. The coefficient of this position with respect to the lift is stored in the microcomputer as the acceleration completion signal oscillation position coefficient k.

However, there is a case where the lift is long and the ascending limit of the transmission mechanism itself is reached by the time the pilot motor forward rotation OFF signal transmission position is reached. In that case, this is sufficient. However, in that case as well, the pilot motor PM is normally turned OFF.

Next, when the elevator basket 1 reaches the intermediate position 1/2 × (L _U + L _D ) of the lifting height, the reverse rotation ON signal is issued to the pilot motor PM, and the deceleration operation is started.

During deceleration operation, the microcomputer detects the instantaneous speed, and when the speed is reduced to the reference speed (0.35 m / sec), the deceleration completion signal is issued and the reverse rotation of the pilot motor PM is turned off. Then, the speed after 0.5 seconds is detected.

Based on the above data, in order to reduce the slow operation speed immediately before the fixed position stop of the elevator cage 1 to the desired speed (0.05 m / sec), the pilot should be decelerated to any instantaneous speed during deceleration operation. It is possible to calculate whether to send the signal that the motor reverse rotation OFF. This calculated value is stored in the microcomputer.

The above is the ascending operation, but the descending operation is also in accordance with this.

(3) # 2 test mode (see FIG. 3 (b)) When the ascending start is performed in this mode, based on the operating specifications based on the data obtained in the # 1 test mode, constant acceleration operation, constant speed top Shift to speed operation, constant deceleration operation and slow constant speed operation. However, in this case, the slow driving distance L before stopping at the fixed position is considerably long.

The main purpose of this mode is to measure the uniform deceleration driving distance, but also to measure the top speed.

The constant deceleration operation distance is the difference between the value of the position counter when transmitting the pilot motor reverse rotation ON signal and the value of the position counter when transmitting the pilot motor reverse rotation OFF signal.

As the top speed, the speed at which the pilot motor reverse rotation ON signal is transmitted is stored in the my-con.

In this mode as well, if the ascending and descending operations are performed and the respective data are stored in the microcomputer, all operating specifications are determined.

(4) Auto Mode (see FIG. 3C) Table 1 shows data stored by the microcomputer. The contents of these data can be read by displaying the contents on the display 11 by switching the display select switch 12 shown in FIG.

In Table 1, there are ascending and descending slow speed correction distances (9) and (A), but normally 50 mm to 100 mm is input.

In the auto mode, the microcontroller MC performs a program process according to these operating specifications and can issue an appropriate command in a timely manner in accordance with the lifting operation status of the lifting device A.

When the ascending start is started in the auto mode, the operation shifts to the constant acceleration operation and the top speed constant speed operation as in the # 2 test mode.

The command to shift to the uniform deceleration operation is based on the calculation value of the # 2 test mode, and the position counter of the elevator cage 1 is in front of the stop position above the floor (equal deceleration operation distance (5), (6) + slow speed). Fired when the corrected distance (9), (A) is reached.

By doing the above, the elevator cage 1 is operated at a speed of about 50 mm before the stop position on the upper floor, which is exactly the desired slow speed constant speed operation, and the fixed position stop is smoothly performed.

By the procedure described above, a series of operations for tuning up the newly installed lifting device is completed.

Further, looking at the operation status of the auto mode, the deceleration completion signal transmission speeds (7), (8) and the slow speed correction distances (9), (A) are input to the memory of the microcomputer so that minor changes can be made. It is also possible to make adjustments again and reset the acceleration completion signal transmission position coefficient k.

A series of tune-up operations of the newly installed lifting device A are completed by the above-described procedure, and the control speed controller MC that inputs the necessary operating specifications is provided in the variable speed transport device (lifting device A). By doing so, control that takes into account the delay in starting the pilot motor PM and the effect of overrun when the pilot motor PM is stopped becomes easier, and the method that uses the induction motor M and the mechanical continuously variable transmission b is widely used. It is possible to do.

Therefore, for example, when it is adopted in an elevator or the like, it is possible to provide a practical elevator in which the slow operation speed immediately before stoppage is stable, high speed operation is possible, and the cost is low.

Even if the microcomputer does not have a learning software program, it can artificially input the acceleration completion signal transmission position, the deceleration start signal transmission position, and the deceleration completion signal transmission speed to operate in the above operation pattern. It can also be a sequencer.

[0059]

[Table 1]

[0060]

[Effect of device]

 In the present invention, an induction motor is used as a drive source and a mechanical continuously variable transmission capable of continuously shifting by a pilot actuator is used for shifting in order to load a person or an object and quickly shift a certain distance. At the same time, the variable speed transfer device is equipped with a control microcomputer for performing a series of controls for starting, accelerating, high speed, decelerating, and slowing down and stopping at a fixed position. The computer has a learning-type software program, and in the test mode operation, it moves up and down based on a predetermined start-up acceleration-high speed-deceleration-slow speed operation pattern to make future normal operation the most based on the design specifications. Appropriate start-up acceleration-high speed-deceleration-slow speed operation Acceleration completion signal transmission position and deceleration start signal transmission position, deceleration appropriate for operating in a pattern Completion signal transmission speed, etc. are calculated, and based on the calculated value, control is performed so that normal operation is performed in the optimum operating pattern of start-up acceleration-high speed-deceleration-slow speed in the auto mode. If an elevator is used as the elevator, it can be easily started up by operating in a prescribed test mode without the need for dispatching an experienced technician at the time of new installation. A gear shift elevator can be provided.

Even if the control microcomputer does not have a learning-type software program, the acceleration completion signal transmission position, the deceleration start signal transmission position, and the deceleration completion signal transmission speed are artificially input to the above-mentioned operation pattern. By using a control microcomputer or sequencer that can be operated, the above-mentioned effects can be obtained without performing a test operation.

In addition, the control microcomputer can be equipped with a function that allows a minor change in the operating specifications stored in the microcomputer to check the operating status during normal operation, thereby improving performance as appropriate. You can

Further, since the control microcomputer can control the operation pattern at a plurality of stop positions on the upper floor and the lower floor, it can be used for a multi-layer floor selective stop, and the versatility can be improved. it can.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a lifting device as a variable speed transport device according to the present invention.

FIG. 2 is an outline view of a control microcontroller of a continuously variable transmission for driving a lifting device included in the variable speed transport device.

FIG. 3 is a graph showing an operation pattern in each mode.

[Explanation of symbols]

 11 Display 12 Display select switch 13 Digi switch 14 Operation mode selection switch 15 Operation switch 16 Memory reset switch 17 Connector section 18 Power connection section Micro controller for MC control MGB Electromagnetic switchboard

Claims (4)

[Scope of utility model registration request] 1. An induction motor is provided as a drive source for the purpose of quickly loading a person or an object and quickly moving a certain distance.
A mechanical continuously variable transmission that can be continuously shifted by a pilot actuator is used for gear shifting, and a series of controls for starting, accelerating, high-speed, decelerating, and slow-moving, and stopping at a fixed position. Is a variable-speed carrier equipped with a microcomputer for control, the microcomputer for control has a learning-type software program, and a predetermined start-up acceleration is performed in a test mode operation.
By moving up and down based on the operation pattern of high speed-deceleration-slow speed, it is necessary to operate the normal operation in the future with the most preferable start-up acceleration-high speed-deceleration-slow operation pattern based on the design specifications. Acceleration completion signal transmission position, deceleration start signal transmission position, deceleration completion signal transmission speed, etc. are calculated, and then start in auto mode based on the calculated values Normal operation with the optimum operation pattern of acceleration-high speed-deceleration-slow speed A variable speed transfer device characterized by being controlled so that 2. The control microcomputer comprises:
A control microcomputer or sequencer that can artificially input the acceleration completion signal transmission position, the deceleration start signal transmission position, and the deceleration completion signal transmission speed without the learning-type software program to operate in the operation pattern The variable speed transport device according to claim 1, wherein 3. The control microcomputer is capable of adding a function of minorly changing operating specifications stored in the microcomputer by observing an operating condition during normal operation. Variable speed carrier. 4. The control microcomputer is capable of controlling the operation pattern at a plurality of stop positions on an upper floor and a lower floor.
The variable speed transport device according to any one of 1.