JPH05319731A - Braking device for linear motor drive elevator - Google Patents

Abstract

PURPOSE:To perform release of the brake and passenger rescue operation work safely and simply at the time of emergency stop of an elevator that goes up and down by thrust of a linear motor. CONSTITUTION:A releasing lever 14 that releases braking of a brake mechanism 10 with its top end part when it is pressed down is provided to the brake mechanism 10 that is mounted to a counterweight 5 and generates braking power by interposing a guide rail 7 on the side of the counterweight, a drum 12 whereto a rotating means such as a hand-working handle, etc., is provided to the pit of a hoistway 1, and one end of a wire rope 11 as a releasing rope is connected to the end part of the releasing lever 14 of the brake mechanism 10, and the other end is connected to the lower part of an elevator cage 4 through a spring 29 and a rod 30, and its dangling lower end part is wound around the aforementioned drum 12 with fixed tension, making itself to move up and down following the rotation of the drum 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device for a linear motor driven elevator that moves up and down by the thrust of a linear motor, and in particular, an operator does not transfer to an elevator car or a counterweight during an emergency stop such as a power failure. The present invention relates to a braking device for a linear motor driven elevator that releases braking.

[0002]

2. Description of the Related Art A conventional linear motor drive elevator is shown in FIG. FIG. 6 is a perspective view showing the entire conventional linear motor drive elevator. In the figure, a return wheel 2 is provided above the hoistway 1, and one end side of a rope 3 wound around the hoistway 1 is connected to an elevator car 4 and the other end side is connected to a counterweight 5 to stand inside the hoistway 1. It is hung vertically along the car-side guide rail 6 and the counterweight-side guide rail 7 that are provided. Then, a linear motor primary side 8 is provided in the counterweight 5, a flat plate-shaped secondary conductor 9 is provided in the hollow portion of the opposing linear motor primary side 8 in close proximity, and one end in the width direction of the secondary conductor 9 is provided. It is connected to the counterweight side guide rail 7 and is erected in the hoistway 1 together with the counterweight side guide rail 7.

The conventional linear motor drive elevator constructed as described above generates thrust between the primary side 8 of the linear motor and the secondary conductor 9 to drive the counterweight 5 and to drive it through the rope 3. The elevator car 4 is moved up and down relatively. Further, a brake mechanism is provided in the counterweight 5, and the elevator car 4 and the counterweight 5 are braked and stopped by holding the counterweight side guide rail 7.

[0004]

However, in the conventional linear motor drive elevator, the counterweight 5 is provided with the brake mechanism. Therefore, when the elevator car 4 is brought to an emergency stop due to a power failure or the like, a worker is required to move up and down the hoistway. Counterweight 5 from within 1
It is necessary to transfer to the vehicle, release the brake mechanism, and perform rescue operation work for passengers. Therefore, the work was extremely dangerous and difficult.

Incidentally, Japanese Patent Laid-Open No. 3-36185 discloses that
There is disclosed a technique in which a rescue operation device is provided in the upper part of a hoistway and rescue work at the time of emergency stop can be performed without transferring to an elevator car or a counterweight. However, the technique disclosed in Japanese Patent Application Laid-Open No. 3-36185 has a main problem of stopping braking with a small braking force. The sheave at the upper part of the hoistway is a traction type, and a brake device interlocking with the sheave shaft and It differs from the above-described conventional braking device in that it is provided with a rescue operation device and is not based on a mechanism for holding a guide rail to perform braking.

Therefore, an object of the present invention is to provide a braking device for a linear motor driven elevator that can safely and easily perform brake release and passenger rescue operation work when the elevator car is in an emergency stop.

[0007]

A braking device for an elevator driven by a linear motor according to the present invention generates a braking force by holding a guide rail attached to an elevator car or a counterweight that moves up and down by the thrust of a linear motor. The brake mechanism is provided with a release lever for releasing the braking of the brake mechanism when the end portion is pushed down, a drum provided with a rotating means is provided in the hoistway pit, and one end of the release rope is applied to the brake. The other end of the release lever of the mechanism is connected to the opposite counterweight or the lower part of the elevator car, and the suspended lower end part is wound around the drum with a constant tension to move up and down as the drum rotates. It was done like this.

[0008]

In the present invention, since the releasing rope is wound around the drum arranged in the hoistway pit a plurality of times with a constant tension, the rotating means attached to the drum at the time of emergency stop such as power failure. When this drum is rotated via, the release rope on the brake mechanism side attached to the elevator car or the counterweight is pulled downward by the traction force of the drum, and the end of the release lever connected to this is pulled. It is pushed down and the braking is released.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is a front view showing a braking device for a linear motor driven elevator according to an embodiment of the present invention, FIG. 2 is a perspective view showing a drum of FIG. 1, and FIG. 3 is a braking for a linear motor driven elevator according to an embodiment of the present invention. FIG. 4 is a front view of a main part of the apparatus before the brake is released, FIG. 4 is a plan view showing the state of the brake mechanism of FIG. 3 before the brake is released, and FIG. 5 is a brake release of the linear motor drive elevator according to an embodiment of the present invention. It is a principal part front view which shows the state after. In the figure, the same symbols as those in FIG. 6 are the same as or correspond to the conventional components.

In the figure, 10 is provided on the counterweight 5, and a brake mechanism for holding and stopping the counterweight 5 and the elevator car 4 by holding the counterweight side guide rail 7 is provided, and 11 is one end of the brake mechanism. The wire rope is connected to the 10 side and the other end is connected to the lower part of the elevator car 4, 12 is a drum arranged in the pit of the hoistway 1, 13 is a shaft which rotates integrally with the drum 12, and the shaft thereof 1
Rotating means for rotating the drum 13 such as a hand-wound handle (not shown) is attached to the end portion of 3. Reference numeral 14 denotes a release lever that is attached to the brake mechanism 10 and is rotatable downward about one end side as a shaft, and a wire rope 11 is connected to a tip end portion on the other end side. The wire rope 11
Is wound around a winding mechanism composed of a drum 12 and a shaft 13 which rotates integrally with the drum 12 a plurality of times, and further, a lower portion of the elevator car 4 via a spring 29 and a rod 30 provided on the elevator car 4 side. It is connected to the.

That is, when the shaft end of the shaft 13 which is integrated with the drum 12 in the pit of the hoistway 1 is rotated through a rotating means such as a manual winding handle, it is wound around the drum 12 a plurality of times. The traction force of the wire rope 11 applies a tension to the wire rope 11 on the side of the counterweight 5, so that the tip of the release lever 14 of the brake mechanism 10 in the counterweight 5 rotates downward. At this time, since tension is constantly applied between the wire rope 11 and the drum 12 by the spring 29, it does not loosen.

3 to 5, axes A16 and B1
7, the shaft C18, the connecting rod 19, and the levers 20 and 21 constitute a link mechanism, and the tip of the release lever 14 is connected to the shaft A1.
By rotating downward about 6 as an axis, the lever 21 adjacent to the brake mechanism 10 rotates about an axis C18. Reference numeral 22 is a rod attached to the end of the lever 21.

Reference numeral 23 denotes a pair of opposed arms in the brake mechanism 10, which can be rotated on a horizontal plane via a pin 24. 25 is a brake lining that is attached to the inside of the ends of the pair of arms 23 and presses the counterweight side guide rail 7, and 26 is attached to the other end of the arms 23 and urges outward. It is a spring. 27
Is an electromagnetic magnet, and 28 is a core that is reciprocally disposed inside the electromagnetic magnet 27, and the arm 23 is horizontally rotated by reciprocating the core. The rod 22 is attached to the opposite end of the core 28.
Is stuck.

Next, the operation of the braking apparatus for the linear motor driven elevator of the present embodiment constructed as described above will be explained. Normally, the spring 26 urges the arm 23 outward, and the urging force is transmitted to the brake lining 25 via the pin 24, and the brake lining 25 presses the counterweight side guide rail 7. The braking force is generated by. At this time, as shown in FIG. 3, the release lever 14 of the brake mechanism 10 has its tip end portion located above, and the rod 22 is located inside the electromagnetic magnet 27 and pulled to the left. When the brake is released to lift the elevator car 4, the electromagnetic lining 27 is actuated to attract the core 28 into the electromagnetic magnet 27 against the elastic force of the spring 26. It is opened to the outside and the pressure on the counterweight side guide rail 7 is released.

Next, a case will be described in which, after the brake mechanism 10 is activated due to a power failure or the like to cause an emergency stop, the brake is released to rescue the passengers in the elevator car 4. At this time, since the electromagnetic magnet 27 does not operate, it is not released by the usual means. To release the braking, an operator manually rotates the drum 12 in the pit of the hoistway 1 by a rotating means such as a manual winding handle of the drum 12. Then, tension is applied to the wire rope 11 on the counterweight 5 side by the traction force of the wire rope 11 wound around the drum 12 multiple times, and the release lever 14 is pushed down. Along with that, the connecting rod 19 moves leftward about the axis A16, and the lever 20 connected to the connecting rod 19 is moved.
Rotates clockwise about the axis B17, the lever 21 rotates about the axis C18, and the rod 22 moves to the right. Therefore, the core 28 is pulled into the electromagnetic magnet 27, and in the same manner as in the case where the braking is released by the electromagnetic magnet 27, the arm 23 rotates about the pin 24 as an axis and the brake lining 25 moves toward the counterweight side. Separate from the guide rail 7. Then, as described above, after the braking is released, the passenger in the elevator car 4 is rescued by the rescue operation.

As described above, the braking apparatus for the linear motor driven elevator according to the above-described embodiment has the brake mechanism 10 which is mounted on the counterweight 5 and which holds the counterweight side guide rail 7 to generate a braking force. A release lever 14 for releasing the braking of the brake mechanism 10 by pushing down the tip portion is provided, and a drum 12 provided with a rotating means such as a manual winding handle is arranged in the pit of the hoistway 1 to release the rope. One end of the wire rope 11 is connected to the end of the release lever 14 of the brake mechanism 10 and the other end is connected to the lower part of the elevator car 4 via the spring 29 and the rod 30, and its suspended lower end is connected to the drum 12. It is wound around with a constant tension and moved up and down as the drum 12 rotates.

Therefore, according to the above-mentioned embodiment, the wire rope 11 is arranged in the pit of the hoistway 1 and the drum 12 is arranged.
Since the drum 12 is wound several times with a constant tension, the rotating weight attached to the drum 12 rotates the drum 12 at the time of an emergency stop such as a power failure. The attached wire rope 11 on the brake mechanism 10 side is pulled downward, and the tip of the release lever 14 connected to this is pushed down to release the braking. As a result, the worker can safely and easily perform the work of releasing the braking in the pit of the hoistway 1 without transferring to the counterweight 5, and can perform the rescue operation of the passengers of the elevator car 4. Also, wire rope 1
Since the brake releasing devices such as 1, the drum 12, the release lever 14 and the like are planarly placed inside the elevator car 4 and the counterweight 5, the plane space for installing these devices may be small.

By the way, in the above embodiment, the counterweight 5 is used.
Although the brake mechanism 10 is provided on the side, the present invention is not limited to this, and the same can be applied to the one provided on the elevator car 4 side. In this case, the spring 29 and the rod 30 for applying a constant tension to the wire rope 11 are attached to the counterweight 5. Further, the above embodiment is applied to the linear motor drive elevator in which the linear motor is mounted on the counterweight 5 side, but in the case of implementing the present invention, it is applied to the elevator in which the linear motor is mounted on the elevator car 4 side. Can also be applied. Furthermore, the drum 12 of the above embodiment
Although the manual rotating handwheel is used as the rotating means for rotating, the present invention is not limited to this, and a normal battery, an engine, or the like may be used.

[0019]

As described above, the braking apparatus for a linear motor driven elevator according to the present invention is mounted on an elevator car or a counterweight that is moved up and down by the thrust of a linear motor and holds a guide rail to generate a braking force. The brake mechanism is provided with a release lever for releasing the braking of the brake mechanism when the end portion is pushed down, a drum provided with a rotating means is provided in the hoistway pit, and one end of the release rope is applied to the brake. At the end of the release lever of the mechanism,
The other end is connected to the opposite counterweight or the lower part of the elevator car, and the suspended lower end part is wound around the drum with a constant tension so as to move up and down as the drum rotates. Therefore, since the releasing rope is wound around the drum arranged in the hoistway pit a plurality of times with a constant tension, this drum is rotated via the rotating means attached to the drum at the time of emergency stop such as power failure. When it rotates, the release rope on the brake mechanism side attached to the elevator car or counterweight is pulled downward via the traction force of the drum, and the end of the release lever connected to this is pushed down to brake. Is released. As a result, the worker can safely and easily perform the work of releasing the brake in the pit of the hoistway without transferring to the counterweight, and can perform the rescue operation of the passenger in the elevator car.

[Brief description of drawings]

FIG. 1 is a front view showing a braking device for a linear motor drive elevator according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the drum of FIG.

FIG. 3 is a front view of relevant parts showing a state before a brake is released from a braking device for a linear motor driven elevator according to an embodiment of the present invention.

FIG. 4 is a plan view showing a state of the brake mechanism of FIG. 3 before releasing the braking.

FIG. 5 is a front view of relevant parts showing a state after the brake is released from the braking device of the linear motor driven elevator according to the embodiment of the present invention.

FIG. 6 is a perspective view showing an entire conventional linear motor drive elevator.

[Explanation of symbols]

 1 hoistway 4 elevator car 5 counterweight 7 counterweight side guide rail 10 brake mechanism 11 wire rope 12 drum 14 release lever 29 spring 30 rod

Claims (1)

[Claims] 1. A brake mechanism, which is attached to an elevator car or a counterweight that moves up and down by the thrust of a linear motor, and which generates a braking force by holding a guide rail, and an end portion which is attached to the brake mechanism and whose end is pushed down. Release lever to release the braking of the brake mechanism, a drum provided in the hoistway pit and provided with a rotating means for rotating in an emergency stop, and one end of the release lever of the brake mechanism. Part, the other end is connected to the lower part of the counterweight or the elevator car facing each other, and the suspending lower end part is wound around the drum a plurality of times with a constant tension, and the lifting rope moves up and down with the rotation of the drum. A braking device for a linear motor drive elevator, comprising: