JP3140436B2 - Elevator equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator apparatus, and more particularly to an elevator apparatus configured to raise and lower a car along a rotating screw rod.

[0002]

2. Description of the Related Art An elevator apparatus in which a car is screwed into a screw rod via a ball and the car is raised and lowered by rotating the screw rod is disclosed, for example, in Japanese Patent Application Laid-Open No. 8-266.
No. 20 discloses this.

[0003]

The above prior art is
If the car stops on the floor due to a power outage or the like and the passenger is in a canned state, the passenger releases the brake of the electric motor with the battery that is the auxiliary power supply by operating the button in the car, and the car arrives at the car with its own weight The passengers are rescued by moving to the entrance on the floor.

[0004] However, when the battery is not charged due to a failure in the battery charging circuit or the battery has lost its function due to aging, the brake of the electric motor cannot be released and the car cannot be released. There was a problem that it was not possible to move to the entrance on the landing floor.

An object of the present invention is to release a brake of an electric motor without requiring an auxiliary power supply such as a battery ,
Prevents passengers from unnecessarily releasing the brakes and lowering the car
It is to provide an elevator apparatus that can.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an elevator car having one end connected to a brake release lever provided on a brake of an electric motor and the other end fixed in a hoistway. a brake release wire stretched, Rutotomoni provided on the car-ride the brake release means having a brake release device for operating the brake release lever by pressing displacing the wire provided in the passenger cage, the brake release
Release the brake at the landing position of the car opposite to the
A means for restraining the operation of the tool was provided. Further, in the above configuration, a centrifugal brake for limiting the rotation speed of the screw rod is provided.

[0007] Since the brake release device is provided on the car, when the car stops on the floor due to a power failure or the like, mechanical operation of the brake release device from inside the car, for example, operation of pushing the brake release device is performed. Accordingly, the brake release tool displaces the brake release wire to operate the brake release lever of the electric motor, and the lever can be released to lower the car by rotating the screw rod by its own weight. This brake release operation is based on the brake release tool.
Move the brake release device to the landing position of the car facing
A restraining means is provided so that the
It is not possible to release the brake even if you operate the rake release tool
Unnecessary brake release device for passengers at the landing position of the wound or car
Can be prevented from lowering the car due to the operation of.

In the case where the lowering speed of the car is increased by releasing the brake of the electric motor, the brake of the electric motor can be intermittently released by intermittently pushing the brake release tool by the passenger. , The increase in the descending speed of the car can be suppressed. It is to be noted that the push-in position of the brake release device can be locked by performing a single push operation of the brake release device by the passenger, but in this case, the descending speed of the car is gradually increased by the brake release of the electric motor. Therefore, in such a case, the descending speed is limited by providing the centrifugal force brake, and the car can be stopped at the entrance of the landing floor without generating a large impact.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.

An electric motor 3 having a brake 4 is fixed to a top side wall of the hoistway 1 via a bracket 2.
The electric motor 3 is arranged so that the electric motor shaft is in a vertical direction. A lower gear 5 is connected to a lower end of the electric motor shaft, and a lower end of an output shaft 5 a of the electric reducer 5 is connected to a screw rod 7 via a coupling 6. Connected.

A thrust bearing 8 is provided at a position below the coupling 6 of the screw rod 7, and the thrust bearing 8 is supported on a side wall of the hoistway 1 via a bracket 9. Here, the brackets 2 and 9 may be individually fixed to the side wall of the hoistway 1, or may be integrally formed and fixed to the side wall of the hoistway 1.

The lower end of the threaded rod 7 extends toward the bottom of the hoistway 1, and is mounted on a pit of the hoistway 1.
, So that horizontal displacement does not occur. On the other hand, the car 11 has a car frame 12 and a car room 13 supported by the car frame 12, and a nut 14 is attached to the car frame 12. The nut 14 is screwed to the screw rod 7 via a plurality of balls (not shown).

The car frame 12 of the car 11 is provided with guide rollers 15A and 15B as guide means above and below the car frame 12, and the guide rollers 15A and 15B are connected to the hoistway 1
The car 11 is guided so as to be able to move up and down by rolling along a pair of guide rails 16 erected inside the car.

A centrifugal brake 17 is connected to a position below the screw rod 7 where the elevator car 11 does not hinder elevation, for example, a portion extending downward through the bearing 10.

The brake 4 of the electric motor 3 is provided with a brake release lever 18, and one end of a brake release wire 19 is connected to one end of the brake release lever 18. The other end of the brake release wire 19 extends toward the bottom of the hoistway 1 in parallel with the guide rail 16 and is fixed to a fixing member at the bottom.

The car 11 is provided with a brake release tool 20 facing the brake release wire 19 over the entire up-and-down stroke. The brake release device 20 has one end of the cab 1 so that it can be operated from the cab 13.
3 protrudes. However, if there is a concern about mischief or a decrease in design due to the protrusion of the brake release tool 20,
A lid 13C may be provided on the car side plate forming the car room 13, and the brake release tool 20 may be operated by opening the lid 13C.

By providing the electric circuit for stopping the operation of the car 11 by opening the lid 13C, if the lid 13C is opened at the time of maintenance inspection or by mistake, a call from another floor is made in this state. Even if there is, it is safe because the car 11 is not moved up and down.

A roller 21 facing the brake release wire 19 at a very small interval during normal operation is provided at the end of the brake release tool 20 outside the cab 13.

Further, stoppers 22A and 22B are provided at the position of the hoistway 1 facing the roller 21 and the brake release wire 19 when the car 11 is landing on the floor. The stopper 22A located above is for preventing the car 11 landing on the stop floor from displacing the brake release wire 19 and releasing the brake 4 due to an erroneous operation of the brake release tool 20.

In addition, at the bottom of the hoistway 1, a car 1
A shock absorber 23 is provided at a position facing the bottom of the car 11 in preparation for a possible drop.

In the above configuration, when a start command is issued by a control device (not shown) during normal operation, the electric motor 3 rotates, and the screw rod 7 is rotated via the speed reducer 5.

The nut 14 screwed to the screw rod 7 moves upward or downward by rotation of the screw rod 7 at a fixed position, and the car 11 integrated with the nut 14 is moved along the guide rail 16. Raise and lower. Here, since the screw rod 7 and the nut 14 are screwed through the ball (not shown) as described above, they can rotate smoothly without generating a large frictional force.

On the other hand, if a power failure or a failure of the motor 3 occurs during the climbing and lowering of the car 11, the brake 4 provided on the motor 3 operates and the car 11 moves between the upper floor and the lower floor. Stop. In such a case, the passenger is in cab 13
Push the brake release tool 20 inside to the outside of the car.

When the brake release tool 20 is pushed in, as shown in FIG.
The roller 21 at the front end, which is opposed to the roller with a minute gap,
As shown in FIG. 3, the brake release wire 19 is pushed in and bent with the roller 21 as a pressing point. The bending of the brake release wire 19 causes the brake release wire 19 to be bent.
The distance between the upper and lower fulcrums is reduced, and the brake release lever 18 connected to the upper end of the brake release wire 19 is inclined. Due to the inclination of the brake release lever 18, the brake 4 is released by leverage, and the car 11 stopped by the brake 4 rotates the screw rod 7 by its own weight, and rotates the electric motor 4 via the speed reducer 5. While starting to descend.

When the passenger releases the brake release tool 20 while holding it down, the car 11 descends while gradually increasing the speed as shown in FIG.

When the lowering speed of the car 11 becomes faster than the normal operating speed, the centrifugal brake 17 connected to the lower portion of the screw bar 7 operates to limit the excessive lowering speed. .

As shown in FIG. 5, when the car 11 descends with its speed controlled in this way, immediately before the landing position on the lower floor, the roller 21 contacts the stopper 22B and the brake is released. The tool 20 is returned to its original position, and the brake release wire 19 is straightened. When the brake release wire 19 returns to a straight line, as shown in FIG. 6, the inclination of the brake release lever 18 is returned, the rotation of the electric motor 3 is stopped by the brake 4, and the screw rod connected via the speed reducer 5 is used. 7 is stopped, and the lowering of the car 11 is stopped.

After the car 11 has stopped, the passenger can safely go outside by opening the doors on the floor side and the car side.

As described above, the brake release lever 1
8, the brake release wire 19 and the brake release tool 20
This is an embodiment of the means for releasing the brake by mechanical operation according to the present invention, and also includes stoppers 22A, 22B.
However, this is a means for restricting the operation of the brake release tool 20 so that the above-described brake release means functions at a position other than the landing position.

In the above description, the passenger pushes the brake release tool 20 until immediately before the car 11 finishes descending. However, once the brake release tool 20 is pushed, the roller 21 comes into contact with the stopper 22B. By configuring so that the pushed-in position can be held until the passenger is returned, the burden on the passenger in an emergency can be reduced.

In the above description, the brake release device 20 is pushed in just before the car 11 finishes descending. However, when the passenger pushes in and pulls back the brake release device 20, the rollers 21 22B
The brake 4 repeats the operation and release by repeating the operation until the position where it cannot be pushed in due to contact with the vehicle, so that the car 11 can gradually descend and land on the lower floor. In such a case, the centrifugal brake 17
Is not necessarily required.

When the brake release device 20 is pushed at the landing position of the car 11, the roller 21 cannot be pushed in because the roller 21 is opposed to the stopper 22A as shown in FIG. Is not bent, so that the lowering of the car 11 due to unnecessary release of the brake 4 by the passenger is prevented.

The ball screw type elevator in which the screw rod 7 and the nut 14 are screwed together via a ball has a low normal operation speed of about 6 m / min due to vibration and noise. On the other hand, the speed at which the car 11 falls under its own weight and descends by the centrifugal brake 17 is about 10 m / sec as a safe speed.
Set to min. When the position of the stopper 22B is set so that the brake 4 of the electric motor 3 is activated at a descent speed of about 10 m / min and at about 20 mm before the landing position, the stop position stops within a normal landing accuracy of ± 10 mm. Can be.

In the above embodiment, the centrifugal force brake 17 is provided at the lower end of the screw rod 7. However, as shown in FIG. Since the rotation speed is increased through the speed reducer 5, the centrifugal brake 17 can be downsized.

Further, in the embodiment of FIG. 1, the electric motor 3 for rotating the screw rod 7 is connected to the upper part of the screw rod 7 via the speed reducer 5, but may be arranged at the lower part of the screw rod 7. .

Further, the centrifugal brake 17 is directly connected to the screw bar 7 and the output shaft 5a of the speed reducer 5 is connected to the screw bar 7 via the coupling 6. A rotating shaft that rotates via a power transmission mechanism such as a belt or a chain may be provided, and the centrifugal brake 17 and the output shaft 5a of the speed reducer 5 may be connected to the rotating shaft.

[0037]

According to the present invention as described above, according to the present invention, by releasing the motor brakes without requiring power such as a battery can be lowered passengers to the bottom floor, and implantation
Unnecessary release of brakes by passenger in position
Ru it is possible to prevent the descent.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an embodiment of an elevator apparatus according to the present invention.

FIG. 2 is a conceptual diagram of a main part showing a state where a car has stopped halfway between upper and lower floors.

FIG. 3 is a conceptual diagram of a main part showing release of a brake provided in an electric motor and lowering of a car.

FIG. 4 is a conceptual diagram of a main part showing a state where the car is lower than that of FIG. 3;

FIG. 5 is a conceptual diagram of a main part showing a state where the car is lower than that of FIG.

FIG. 6 is a conceptual diagram of a main part showing a state in which the car is landing on the second floor during normal operation.

FIG. 7 is a conceptual diagram of a main part showing another installation state of the centrifugal brake.

[Explanation of symbols]

1: hoistway, 3: electric motor, 4: brake, 5: reducer,
7 ... screw rod, 11 ... car, 14 ... nut, 17 ... centrifugal force brake, 18 ... brake release wire, 19 ... brake release wire, 20 ... brake release tool, 21 ... roller, 2
2A, 22B ... stopper.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Isao Yoshida 832-2 Horiguchi, Hitachinaka-shi, Ibaraki Hitachi System Plaza Katsuta Hitachi Mito Engineering Co., Ltd. (72) Inventor Takehiko Yasuda 832-Horiguchi, Hitachinaka-shi, Ibaraki 2 Hitachi System Plaza Katsuta Hitachi Mito Engineering Co., Ltd. (56) References JP-A-8-26620 (JP, A) JP-A 9-142752 (JP, A) (58) Fields investigated (Int. . ^7, DB name) B66B 5/00 - 5/02 B66B 9/02

Claims (4)

(57) [Claims] An elevator apparatus provided with a brake-equipped motor for rotating a screw rod screwed through a ball to a car guided in a hoisting direction in a hoistway in a hoistway. Means for releasing the brake of the electric motor by operation, and a centrifugal brake for limiting the rotation speed of the screw rod, wherein the brake release means is connected at one end to a brake release lever provided on the brake of the electric motor. A wire having the other end fixed in the hoistway and extending in the elevating direction of the car, and a brake release tool provided on the car and pressing and displacing the wire to reduce the distance between both ends of the wire. An elevator apparatus provided with means for restraining the operation of the brake release tool at the landing position of the car opposite to the brake release tool. 2. An elevator apparatus according to claim 1, wherein said brake release means is configured to hold its operation once activated, and to return upon landing of said car. 3. The elevator apparatus according to claim 1, wherein the centrifugal brake is provided on a rotating shaft that rotates in conjunction with the rotation of the screw rod. 4. An elevator apparatus according to claim 1, wherein said centrifugal brake is formed integrally with said electric motor.