JPS6031746B2 - Elevator emergency operation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for operating an elevator during emergencies such as power outages.

When an elevator car stops midway between floors due to a power outage or malfunction and becomes unable to run, passengers are trapped inside the car (hereinafter referred to as a "stuck state").

) occurs. It has been proposed to use a storage battery and a small auxiliary motor to drive the main motor to operate the car and rescue passengers who are stuck in the car. An example is shown in FIG. In the figure, 1 is the main motor for driving the elevator, 2 is a large gear mounted on the shaft of the main motor 1, 3 is an auxiliary motor installed on the outer frame of the main motor 1, and 4 is mounted on the shaft of the auxiliary motor 3. A small gear 5, which moves in the direction of the large gear 2, is a worm shaft of the main motor 1, and is connected to a worm (not shown).

6 is a sheave that is decelerated by the worm, 7 is a sheave 6
The main element is wrapped around, 8 is a basket, and 9 is a counterweight.

When the power goes out, the main motor 1 stops, and the car 8 also stops.

At this time, if the car 8 is between floors, the small gear 4 moves to the left in FIG. 1 and engages with the large gear 2. Next, the auxiliary motor 3 is driven by the storage battery, rotates the main motor 1 via the large gear 2, and drives the car 8 to rescue passengers from the nearest floor. When the emergency operation ends, the pinion 4 moves in the opposite direction and returns to the position shown in FIG.
Now, in order to reduce the load on the storage battery, the auxiliary electric motor 3
It is desirable that it be small.

For this purpose, it is better to move the elevator in the lowering load direction during emergency operation, that is, to move either the heavier car 8 or the counterweight 9 downward. However, when moving in the direction of the unloaded load as described above, when the weight difference between the car 8 and the counterweight 9 is large, the auxiliary motor 3 is rotated by torque from the load side, becomes a generator, and transfers regenerative current to the storage battery. Flow. Since this regenerative current becomes very large when the above-mentioned weight difference is large, the auxiliary motor 3 and the storage battery must be able to withstand this. This prevents the auxiliary motor 3 and the storage battery from becoming smaller and cheaper. This invention is intended to improve the above-mentioned problems, and aims to provide an emergency operation device for an elevator in which the auxiliary motor and storage battery can be made smaller and cheaper without causing the auxiliary motor to rotate due to torque from the load side. .

An embodiment of this invention will be described below with reference to FIGS. 2 to 6.

In Figure 2, 3A is the auxiliary electric motor for raising, 3B is the auxiliary electric motor for lowering, and 4A and 4B' are auxiliary electric motors 3A and 3B, respectively.
A small gear mounted on the shaft of the speedometer generator driven by the main motor 1; 11 is an overspeed detection relay that is activated when the voltage of the speedometer generator 10 exceeds a predetermined value; 12 is a load detector that detects the load within the car 8.

In FIGS. 3 to 6, 13 is a shaft of an auxiliary electric motor 38, and 14 is a moving element that is attached to the shaft 13 and is movable in the direction of the arrow, but cannot be rotated with respect to the shaft 13. A collar 14a projecting outward is formed on the outside thereof.
158 is a one-way transmission device such as a well-known one-way clutch, 1
Reference numeral 5a denotes an outer ring of the transmission device 15B, which is fixed to the small gear 4B and is configured to be able to engage with the slider 14 and move on the shaft 13 in the direction of the wheel. 15b is a cam surface formed on the inner periphery of the outer ring 15a, 15c is a metal spring, 15d is a roller, 1
6 is a support fixed to the auxiliary electric motor 3B and pivotally supports the shaft 13; 17 is an annular stopper attached to the shaft 13; 18 is pivotally connected to the support 16 at a fulcrum 18a, and the lower end is moved by the slider 14. A connecting rod, 19 is a plunger whose one end is connected to the upper end of the connecting rod 18 and is movable in the axial direction of the shaft 13, 20 is a push spring that urges the plunger vine 9 in the direction of arrow A, and 21B is an auxiliary electric motor 3B. This is a plunger coil that is fixed to and provides a force to move the plunger 19 in the direction of arrow B against the force of the push spring 20.

Note that the auxiliary electric motor 3A has a similar configuration (however, the one-way transmission is indicated by the reference numeral 15A, and the plunger coil is indicated by the reference numeral 21A). First, the operation of the one-way transmission device 15B will be briefly explained.

When the slider 14 rotates in the counterclockwise direction (downward direction) in FIG. to drive the outer ring 15a. Next, when the outer ring 15a rotates counterclockwise in FIG. 5b faster than the slider 14, the slider 14 rotates clockwise relative to the outer ring 15a, and the rollers 15d The outer ring 15a moves away from the outer ring cam surface 15b and idles relative to the mover 14. Now, when the plunger coil 218 is energized in the state shown in FIG.
direction, causing the connecting rod 18 to rotate clockwise.

Therefore, the lower end of the connecting rod 18 is connected to the one-way transmission device 15.
Press the side of B. As a result, the transmission devices 15B, 4
- The gear 4B and the mover 14 move in the direction of arrow A. When the fourth gear 14B hits the annular stopper 7, the small gear 4B engages with the large gear 2. After this engagement is completed, if the shaft 13 is rotated counterclockwise as shown in FIG. drive Next, when the small gear 48 and the large gear 2 are in the engaged state, when the plunger coil 218 is deenergized, the plunger 19 moves in the direction of arrow A by the force of the push spring 20, and the connecting rod 18
Rotate counterclockwise.

Therefore, the lower end of the connecting rod 18 presses the collar 14a, and the mover 14, the transmission device 15B, and the small gear 48 move toward the arrow B.
direction and return to the position shown in Figure 4. In Figure 6,
N+ and N1 are DC normal power supplies, E+ and E1 are storage battery power supplies, and 11a is the normally closed contact of the overspeed detection relay 11 in Fig. 2.
12a is a contact of the load detector 12, which is connected to the d side when the load makes the car 8 heavier than the counterweight 9, and is connected to the u side when the load is reversed.

25 is a power failure detection time relay that operates immediately when it is energized and returns after a certain period of time when it is deenergized; 25a and 25b are its normally open contacts; 25c and 25d are also normally closed contacts; A door opening/closing area detection relay contact opens when the door opening/closing area is reached. 27 is a group of contact points for brake release conditions during normal power supply, 28 is a brake coil that releases the main motor 1 when energized, and is deenergized. The main motor 1 is restrained by the force of a spring (not shown).

28a is a brake support point that closes when the brake coil 28 is energized and opens when it is deenergized; 29 is a rising relay;
29a is its normally open contact, 30 is its lowering relay, and 30a is its normally closed contact.

Next, the operation of this embodiment will be explained. Normal power supply N1. N
- During normal operation, the power failure detection time relay 25 is energized, the contacts 25a and 25b are closed, and the contacts 25c and 25d are open.

Although the circuit is not shown, normal operation of the elevator is performed in this way. Now, when the normal power supplies N+ and N- are out of power, the brake coil 28 is deenergized, the main motor 1 is restrained, and the car 8 is stopped.

On the other hand, the power failure detection time relay 25 is deenergized and returns to its original state around the time the car 8 stops, opening the contacts 25a and 25b and closing the contacts 25c and 25d. If the car 8 is not in the door opening/closing area, the door opening/closing area detection relay contact 26 is closed, so B+-11a-26-25c-28-25
The brake coil 28 is energized by the d-E circuit, and the main motor 1 is released. Also, the brake contact 28a is closed. Now, when the load on the car 8 is large and the car 8 is heavier than the counterweight 9, the load detector contact 12a is connected to the d side, the lowering relay 30 is energized, and the contact 30a
is closed. As a result, the lowering auxiliary motor 3B and the plunger coil 21B are energized. Due to the biasing of the plunger coil 21B, the small gear 4B and the large gear 2 engage with each other as described above. At this time, if the difference in weight between the car 8 and the counterweight 9 is not large enough, the car 8 cannot run by itself. However, since the torque of the auxiliary electric motor 3B is transmitted to the large gear 2 via the transmission device 15B, the main electric motor 1 is driven (not energized, of course), and the car 8 moves in the downward direction via the sheave 6. When the car 8 reaches the door opening/closing area of the nearest floor, the contact 26 opens, the auxiliary motor 3B and the plunger coil 21B' are deenergized, the brake coil 28 is also deenergized, and the main motor 1 is restrained. Car 8 stops, the door opens, and the passengers are rescued. if,
When the small gear 48 and the large gear 2 are engaged, the difference in weight between the car 8 and the counterweight 9 is large, and the rotational speed of the small gear 4B, that is, the rotational speed of the outer ring 15a of the transmission device 15B, is the rotational speed of the auxiliary electric motor 3B. When it exceeds 1, the outer ring 15a idles relative to the mover 14, that is, the shaft 13 of the auxiliary motor 3B, as described above.

Therefore, the auxiliary motor 38 is not rotated by the car 8 and does not reach overspeed. When the car 8 runs on its own in the tilted state and its speed exceeds a predetermined value, the weekly lift detection relay 11 is energized and the contacts 11a are opened. With this, the brake coil 28, the auxiliary electric motor 38, etc. are deenergized, and the car 8 is decelerated.When the speed of the car 8 becomes less than a predetermined value, the overspeed detection relay 11 is deenergized again, and the contact 11a
is closed, the brake coil 28 is energized, and the car 8 starts running. The operation after the car 8 reaches the door opening/closing area of the nearest floor is as described above. In either case, when the door opening/closing section detection relay contact 26 is opened, the plunger coil 21B is energized. Then, the small gear 4B moves in the direction of arrow B by the operation of the connecting rod 18, and the engagement between the small gear 48 and the large gear 2 is disengaged. Although the above description has been made regarding the lowering auxiliary motor 3B, the same applies to the ascending auxiliary motor 3A.

In this case, it goes without saying that the transmission device 15A is configured so that when the shaft 13 of the auxiliary electric motor 3A rotates in a direction that raises the car 8, the torque is transmitted to the large gear 2. In the embodiment, the large gear 2 is attached to the shaft of the main motor 1, but the effect is the same even if it is attached to the worm shaft 5.

Although the embodiment describes a rescue operation in the event of a power outage, it can also be applied to the case of rescuing a passenger who has become stuck due to a breakdown by replacing the power outage detection time relay 25 with a stuck detection relay. It is.

In addition, in the embodiment, an auxiliary electric motor 3A is used for raising and lowering.
, 3B, but it is also possible to use one auxiliary motor.

In this case, the running direction of the car 8 is necessarily limited to one direction, but it is better to set the running direction to the downward direction for the following reasons. That is, a normal lobe type elevator has a counterweight 9 whose weight is equal to the weight when the car 8 is loaded with 45% of its capacity. On the other hand, when considering the load conditions of the auxiliary motor, the worst condition is overload (110% of capacity) when the car 8 is running up, and no load when it is running down. From the weight of the counterweight 9, the weight difference between the bar 8 and the counterweight 9 is smaller in the downward operation than in the upward operation. Further, the total weight of the elevator drive system, that is, the total weight of the car 8, counterweight 9, main rope 7, moving cable (not shown), etc., is lighter when unloaded than when overloaded. In this way, in any case, the required torque of the auxiliary motor is smaller in the no-load downward operation than in the overload upward operation, and a smaller capacity motor can be used. Furthermore, in the case of one auxiliary motor, the load detector 12 and other relays related to direction determination are not required, and the construction can be made at low cost. As explained above, in this invention, a transmission device is provided between the auxiliary electric motor that is driven by a storage battery to drive the elevating object in the event of a power outage or failure, and the elevating object,
The torque of the auxiliary motor is transmitted to the elevating body, but the torque from the elevating body is not transmitted to the auxiliary motor, so the auxiliary motor is rotated from the load side and acts as a generator, resulting in regeneration to the storage battery. Inflow of current is avoided,
The auxiliary electric motor and storage battery can be made smaller and cheaper.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing a conventional elevator emergency operation device.
Fig. 2 is an overall configuration diagram showing one embodiment of an emergency operation device for an elevator according to the present invention, Fig. 3 is a front view of the auxiliary motor part shown in Fig. 2, and Fig. 4 is a longitudinal cross-section of the transmission part shown in Fig. 3. 5 is a cross-sectional view taken along line V-V in FIG. 4, and FIG. 6 is a control circuit. 1... Main electric motor for driving the elevator, 2...
Large gear, 3A... Auxiliary electric motor for lifting, 3B...
Lowering auxiliary motor, 4A, 4B...Small gear, 6
...sheave, 8...basket, 9...counterweight, 12
...Load detector, 13...Auxiliary motor shaft, 14
...Movers, 15A, 15B... One-way transmission, 18... Connection rod, 19...
・Plunger, 20...Press spring, 21A, 21
B... Coil for connecting rod, 25...
Power failure detection time relay, 28...Brake coil, 29...Relay for ascending, 30...Relay for descending. Note that the same parts in the figures are indicated by the same reference numerals. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 5 Figure 6

Claims (1)

[Claims] 1 A hoist equipped with a main electric motor that normally drives an elevating body consisting of a car and a counterweight, and a large gear attached to the operating shaft, a storage battery that supplies power in the event of an abnormality such as a power outage or breakdown, and a small an auxiliary electric motor having a gear mounted on its output shaft, supplied with power from the storage battery in the event of the abnormality, and causing the small gear to engage with the large gear to drive the hoist in the direction of lowering the lifting body; The auxiliary motor is provided between the auxiliary motor and the hoisting machine to engage both the output shaft of the auxiliary motor and the operating shaft of the hoisting machine when the auxiliary motor applies a torque in the lowering load direction of the hoisting machine. and an emergency operation device for an elevator, comprising a one-way transmission device that releases the engagement between the two when the elevating body performs a trick action in the lowering load direction from the hoisting machine.