JP2502188B2 - Linear motor drive type elevator controller - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control device, and more particularly to a linear motor drive type elevator control device in which a basket and a counterweight are formed in a hanging shape.

[Prior Art] FIGS. 5 and 6 show, for example, a conventional linear motor drive type elevator using a linear induction motor as a motor disclosed in Japanese Patent Application Laid-Open No. 1-271381 and its secondary conductor also serving as a rail. FIG. 5 (a) is a plan view of the hoistway, FIG. 5 (b) is a side view of the hoistway, and FIG.
The figure is a detailed view of the braking device. In the figure, (1) is a hoistway wall, (2) is a hoistway formed by being surrounded by the hoistway wall (1), and (3) is movably provided in the hoistway (2). A cage frame, (4) is a cage rail attached to a predetermined position of the hoistway wall (1), and (5) is this rail (4)
A guide shoe of a cage attached to the cage frame (3) so as to be slidable with, (6) is a counterweight, (7) is a primary winding of a linear induction motor mounted on the counterweight (6), (8) is a secondary conductor of a linear induction motor mounted at a predetermined position on the hoistway wall (1), and (9) is a counterweight (6) provided so as to be slidably engaged with the secondary conductor (8). Guide shoe, (10) is a counterweight (6)
A braking device mounted on the vehicle, (11) a cable, (12) a sheave, and (13) a basket frame (3) and a counterweight (6) hanging in a hanging manner via the sheave (12). The rope (14) is an elevator control circuit connected to the counterweight (6) via a cable (11). FIG. 6 is a detailed view of the braking device (10) described above, and one pair of the braking device (10) is provided on each of the left and right sides. In the figure, (10a) is a braking shoe provided on the side surface of the secondary conductor (8), respectively, and (10b) is a braking shoe (10c) via a lever (10c).
A spring for pressing a) against the secondary conductor (8), (10d) is an electromagnet device fixed to the lower part of the counterweight (6), and when excited, resists the rod (10e) against the spring (10b). Suction and hold the braking shoe (10a) in the open position. (Ten
f) is a lever (10c) fixed to the counterweight (6)
Is a pin that supports the rotation of the.

Next, the operation of the conventional linear motor drive type elevator controller shown in FIGS. 5 and 6 will be described. The cage is moved up and down by exciting the primary winding (7) of the linear motor mounted on the counterweight (6) so that the secondary conductor (8) and the primary winding (7) of the linear motor are relatively moved. This is done by generating a specific thrust and driving the counterweight (6). That is, the thrust of the counterweight (6) is transmitted to the cage frame (3) via the rope (13), and the cage frame (3)
Is moved up and down while being guided by the guide shoe (5) along the rail (4). By stopping the excitation of the electromagnet device (10d) of the braking device (10) at the time of stop or emergency stop, the braking shoe (10a) grasps the secondary conductor (8) and holds the counterweight (6). In addition, 1 of linear motor
The control of the next winding (7) and the control of the braking device (10) are performed by the control circuit (14) of the elevator via the cable (11).

[Problems to be Solved by the Invention] Since the control device for the conventional linear motor drive type elevator is configured as described above, the braking device and the part mounted on the counterweight side of the components of the braking device fail. When the braking force is applied due to (for example, the coil of the electromagnet device is broken), the elevator cannot move, and the part mounted on the counterweight side is out of order, so it is difficult to repair it. If a failure occurs while the elevator is traveling between floors, the elevator stops between floors, making it difficult to rescue passengers.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain an elevator control device with a linear motor drive system that is highly safe and economical.

[Means for Solving the Problem] A linear motor drive type elevator control device according to the present invention is a linear motor drive type elevator in which a basket and a counterweight are configured in a slippery shape, and either the cage or the counterweight is provided. A plurality of braking devices, each of which has a structure independent of each other, a first detection device for detecting a difference in weight between the basket side and the counterweight side, and the braking device. A second detection device for detecting the operation of the braking device, and when the second detection device detects a failure of the braking device, the load on the linear motor is increased based on the output of the first training device. The basket is made to run in a lightening direction.

[Operation] In the present invention, since the braking devices are independent of each other and are divided into a plurality of parts, the probability of failure of all the braking devices at the same time is small. When the braking device fails, the second detecting device detects the failure, the first detecting device detects the cage load, and the motor is caused to travel in a direction in which the load is lightened. As a result, one of the plurality of braking devices fails, and the thrust of the motor drives the nearest basket to rescue passengers in the basket and repair the broken braking device. Further, since the load in the basket is detected and the load on the motor is moved in the direction of lightening, the number of braking devices can be reduced, which is economical.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
~ (14) are the same as above. (3A) is a cage,
(15) is an anti-vibration rubber interposed between the cage frame (3) and the cage chamber (3A), and (16) is a differential transformer that detects the deflection of the anti-vibration rubber (15) to detect the load in the cage. , This differential transformer (16)
2 has a characteristic of generating an output in proportion to the load in the basket as shown in FIG. 2 (a). In Fig. 2 (a), NL has a cage load of zero, and BL has a cage load of 1/2 the rating, F
L indicates that the cage load is the rated load. Reference numeral (11E) indicates the output signal of the differential transformer (16), which is a cage load determination circuit (141) in the elevator control circuit (14) (Fig. 2 (c)).
It is a signal line for transmitting to. The differential transformer (16)
The cage load determination circuit (141) constitutes a first detection device. The cage load determination circuit (141) has the operating characteristics shown in FIG. 2 (b). When the cage load is BL or less, (the cage load is
In the case of BL, the basket side and the counterweight are configured to be balanced), and the output relay coil LD shown in FIG. 2 (c) is excited. Output relay coil LD when basket load exceeds BL
Is deactivated. (10A), (10B), (10C), and (10D) are braking devices, (11A), (11B), (11C), and (11D), respectively.
Is an electric wire for connecting the electromagnet device (not shown) of the braking device and the elevator control circuit (14).

FIG. 3 is a sectional view of the braking device described above. In FIG. 3, (10g) is a limit switch as a second detection device, which operates as follows. Electromagnetic device (10
When the rod (10e) is attracted against the spring (10d) by d), the a contact of the limit switch (10g) is closed and the b contact of the limit switch (10g) is closed by the movement of the lever (10c), and conversely the rod (10e). Limit switch (10
The contact a in g) is opened and the contact b is closed. This limit switch (10g) is added to all braking devices.

FIG. 4 is a configuration diagram showing a braking device relationship in the elevator control circuit (14). A portion C surrounded by a broken line indicates that it is on the counterweight side. In the figure, BKA, BKB, BK
C and BKD represent coils of the electromagnetic device of the braking device. (14
2) is a DC power supply device, BK is a contact that controls the braking device, BKR
Is a relay coil that operates in response to contact BK, BKRa, BKRb
Is normally open contact, normally closed contact of relay coil BKR, BKAa, BKB
a, BKBCa, and BKDa are limit switches (10
g) a contact, similarly BKAb, BKBb, BKCb, BKDb are b contacts of the limit switch (10g) of each braking device, CH is a timed relay coil for checking the operation of the braking device, CHa is its normally open contact, (143 ) Is an elevator safety circuit, ES is its output relay coil, (144) is an emergency operation circuit, RS is its output relay coil, and RSa is its normally open contact. UP, D
N is a relay coil that determines the traveling direction during emergency operation. When the relay coil UP is excited, the elevator runs upward, and when the relay coil DN is excited, the elevator runs downward. LDa is the normally open contact of the output relay coil LD, and LDb is its normally closed contact.

Next, the operation of the embodiment of the present invention shown in FIGS. 1 to 4 will be described. First, the braking device (10A), (10
The braking forces of B), (10C) and (10D) are selected as follows. When the total braking force required in this elevator system is FT, the control force FB of each braking device is selected as shown in equation (1).

FB = FT / 4 (1) FB is selected as the braking force that can drive the motor under the conditions described below, even if FB is added as a motor load. When the number of braking devices is reduced, the FT becomes large, and the motor requires extra large thrust, which is uneconomical. Further, in order to reduce the margin of the motor, it is sufficient to increase the number of braking devices, but it is obvious that this also increases the cost.

Now, when the elevator is stopped, the contact BK is open, so the relay coil BKR, the coil BKA of the electromagnetic device of the braking device,
BKB, BKC and BKD are demagnetized. Therefore, the braking device is in the braking state, and the contact point BKAa of the limit switch (10g) is
~ BKDa is open and B contacts BKAb ~ BKDb are closed. Therefore, the timed relay coil CH is excited along the route indicated by the arrow L2. Therefore, the output relay coil ES of the safety circuit (143) is excited. On the other hand, since the emergency operation circuit (144) is not operating, the relay coils UP, DN and RS are demagnetized. Next, when the contact BK is closed during running, the relay coil BK
R, coil of electromagnetic device BKA, BKB, BKC, BKD of braking device
Is excited. Therefore, the braking device is released, and the a contact of the limit switch (10g) is closed and the b contact is opened.
Therefore, the relay coil CH is kept excited along the route indicated by the arrow L1. If, for example, the coil BKA of the electromagnet device of the braking device (10A) is broken in this state, the rod (10e) is no longer attracted, and the a contact BKAa of the limit switch (10g) opens and the b contact BKAb closes. Therefore timed relay coil CH
Is demagnetized, and as a result, the relay coil ES is demagnetized and the elevator stops in an emergency.

The emergency operating circuit (144) is then activated to rescue the passenger. As a result, the output relay coil RS is excited, its contact RSa is closed, the output relay coil ES of the safety circuit (143) is excited again, and the elevator is ready to run. Next, the operation of the cage load determination circuit (141) will be described. Now, assuming that the load in the cage is less than BL, the output relay coil LD is in the excited state. Therefore, since the normally open contact LDa is closed, the relay coil UP is excited and the cage is controlled to move upward. In this case, moving the basket upward is less burdensome on the motor than moving the basket downward. Therefore, at this time, the braking device (10A) is out of order and the braking force of FB is working, but since the motor can withstand such an increase in load, the elevator can run as it is and rescue passengers. Can be done.
Further, when the load in the basket is larger than BL, the same consideration as above may be applied. That is, in this case, since the output relay coil LD is in the demagnetized state and the normally closed contact LDb is closed, the relay coil DN is excited and the cage is controlled to move downward. At this time, moving the basket downward is less burdensome for the motor than moving the basket upward. Therefore, in this case as well, the braking device (10A) is out of order and the braking force of FB is working, but since the motor can withstand such an increase in load, the elevator can run as it is and rescue passengers. You can

Although the braking device is mounted on the counterweight in the above embodiment, it may be mounted on the basket.

[Effects of the Invention] As described above, according to the present invention, in a linear motor drive type elevator in which a basket and a counterweight are configured in a slippery shape, the elevator is mounted on either the cage or the counterweight and is independent of each other. A plurality of braking devices configured as described above, a first detection device that detects a difference in weight between the basket side and the counterweight side, and a first detection device that is provided in each of the braking devices and that detects the operation of the braking device. 2 detection device, and when the failure of the braking device is detected by the second detection device, the cage is run in a direction in which the load of the linear motor is reduced based on the output of the first detection device. Therefore, it is extremely unlikely that a plurality of braking devices will fail at the same time, and even if one braking device fails and braking force is exerted, a large amount of motor thrust is required. There is an effect that the cage can be pulled without any need, and an economical and highly safe linear motor drive type elevator control device can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation of FIG. 1, FIG. 3 is a sectional view showing an essential part of the present invention, and FIG. FIG. 5 is a configuration diagram showing another main part of the invention, FIG. 5 is a configuration diagram showing a conventional linear motor drive type elevator control device, and FIG. 6 is a sectional view showing the braking device of FIG. In the figure, (3A) is a cage, (6) is a counterweight,
(7) is the primary winding of the linear induction motor, (8) is the secondary conductor of the linear induction motor, (10A), (10B), (10C),
(10D) is a braking device, (10g) is a limit switch, (1
6) is a differential transformer, and (141) is a cage load determination circuit. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] 1. A linear motor drive type elevator having a basket and a counterweight formed in a slippery shape, and a plurality of braking devices mounted on either the basket or the counterweight and configured independently of each other, A first detection device that detects a difference in weight between the basket side and the counterweight side; and a second detection device that is provided in each of the braking devices and that detects an operation of the braking device. When the failure of the braking device is detected by the second detection device, the cage is moved in a direction in which the load of the linear motor is lightened based on the output of the first detection device. Motor drive type elevator control device.