JPH05147855A - Elevator brake releaser - Google Patents

Abstract

PURPOSE:To provide an elevator brake releaser capable of performing a brake release at the time of cage emergency stopping and a passenger rescue operating job so safely and easily. CONSTITUTION:A lever 45a for releasing the rail holding of a brake 20 is installed in this brake 20 which holds a guide rail 7 between and generating its braking force, while a through hole 45b is formed in a terminal of the lever 45a, and one side of an endless wire rope 50 wrapped on two pulleys 48, 49 installed up and down in an elevator shaft 1 free of rotation is pierced through this through hole 45b relative-shiftably in a noncontact state, while an actuating piece 51, engaging with a peripheral edge of the through hole 45b of the lever 45a and operating this lever 45a, is installed in the specified part of one side of the wire rope 50, and with these pulleys 48, 49 rotated, the lever 45a is operated and thereby the brake is made so as to be released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator having a car side or a counterweight side provided with a brake device for holding a corresponding guide rail to generate a braking force, and more particularly to a brake for a car emergency stop. The present invention relates to an elevator brake release device that can perform release and passenger rescue operation work safely and easily.

[0002]

2. Description of the Related Art Conventionally, there is known an elevator in which a brake device for holding a corresponding guide rail and generating a braking force is installed on a car side or a counterweight side.

FIG. 7 shows an example of a conventional elevator using such a brake device, and is a perspective view showing the overall construction of a linear motor drive type elevator. In FIG. 7, reference numeral 1 is a hoistway, a return wheel 2 is installed above the hoistway 1, and a main rope 3 is wound around the return wheel 2. A car 4 is connected to one end of the main rope 3 and a counterweight 5 is connected to the other end of the main rope 3. The main rope 3 corresponds to the car 4 and the counterweight 5, and the hoistway 1
Along the guide rails 6 and 7 which are erected inside, it is suspended and supported so as to be vertically movable.

A guide rail 7 is provided on the counterweight 5 side.
The primary side 8 of the linear motor is provided so as to sandwich it, and the flat secondary conductor 9 is provided in the hollow portion of the opposing primary side 8.
Are arranged. The secondary conductor 9 is clamped and fixed by a pair of chevron steels 7a and 7b forming one side of the guide rail 7, and the secondary conductor 9 is erected in the hoistway 1 together with the guide rail 7. Therefore, when the counterweight 8 is driven by the primary side 8 and the secondary conductor 9 of the linear motor, the car 4 relatively moves up and down via the main rope 3.

A braking device 10 is provided on the side of the counterweight 5, and by holding the guide rail 7 by the brake device 10, the counterweight 5 can be braked to stop the car 4. It has become. In addition, 11a and 11b are buffers respectively installed at the bottom of the hoistway below the car 4 and the counterweight 5.

In such a case, the braking device 1
0 normally generates a braking force by pressing the lining against the guide rail 7 by an elastic force of a spring (not shown). Further, when the counterweight 5 is released, that is, when the car 4 is running, the brake is released by opening the lining against an elastic force of the spring by an electromagnetic magnet (not shown). Further, when the driving force of the linear motor or the brake releasing force of the electromagnetic magnet disappears due to a power failure or the like, the brake device 10 generates a braking force,
Prevent the basket 4 from falling. In such a case, rescue of the passenger is performed by releasing the brake device 10 and landing the car 4 on the nearest floor.

[0007]

The conventional elevator is
Because of the above-mentioned configuration, the cage 4 due to a power outage, etc.
In the rescue operation of passengers at the time of emergency stop of
It was necessary to transfer to the counterweight 5 inside and release the brake device 10, and the work was very dangerous and difficult.

In view of the above points, an object of the present invention is to obtain an elevator brake release device that can safely and easily perform brake release at the time of a car emergency stop and passenger rescue operation work.

[0009]

The elevator brake releasing device according to the present invention is a brake release device for an elevator, in which a car is connected to one end of a main rope wound around a return wheel in the upper part of a hoistway and a balance weight is connected to the other end of the main rope. These cars and counterweights are suspended and supported so as to be vertically movable along the guide rails that are erected in the hoistway in a corresponding manner, and the corresponding guide rails are held on the car side or the counterweight side. With a brake device installed to generate braking force,
The brake device is provided with a lever for releasing the rail grip, and a through hole is formed at the end of the lever, and the through hole has a plurality of pulleys rotatably provided vertically in the hoistway. One end of the wound endless wire rope is movably penetrated in a non-contact state so that the lever is engaged with a predetermined portion of the one end of the endless wire rope with a peripheral edge of a through hole of the lever. It is provided with an operating piece for operating.

[0010]

In the present invention, the actuating piece provided on the wire rope is usually placed at a position outside the up-and-down stroke of the car or the counterweight on which the brake device is installed. In this state, the lever for releasing the rail grip does not engage with the operating piece, and the wire rope that penetrates the through hole of the lever is also set to be relatively movable in a non-contact state with respect to the lever. The wire rope and the car or counterweight do not interlock during traveling. However, when the pulley for guiding the wire rope is rotated in the direction in which the operating piece and the lever are engaged during the emergency stop of the car, the operating piece and the lever are engaged, and the brake release operation is enabled by the pulley. If the braking force is adjusted by the pulley from this state, the car can be gently lowered or raised, and the car can be landed on the nearest floor.

[0011]

【Example】

Example 1. FIG. 1 shows a first example in which the brake release device for an elevator according to the present invention is applied to a linear motor drive type elevator.
2 is a side view showing the overall configuration of the embodiment of FIG. 2, FIG. 2 is a plan view showing an enlarged main part thereof, FIG. 3 is an enlarged front view showing the main part, and FIG. 4 shows a state different from FIG. It is a front view, and in each drawing, portions corresponding to conventional ones are denoted by the same reference numerals.
In FIGS. 1 to 4, reference numeral 20 denotes a brake device provided on the side of the counterweight 5, which holds the guide rail 7 to brake the counterweight 5 and stop the car 4. 40 is a brake device 2 at the time of emergency stop
It is a brake release device for releasing the brake 0 and performing passenger rescue operation work.

That is, as shown in FIG. 2, the brake device 20 is arranged so as to face each other with the guide rail 7 sandwiched between the brake devices 20, and the intermediate portion in the longitudinal direction is pivoted to the counterweight 5 side via the pins 21 and 22. A pair of worn arms 23, 24
And the brake linings 25 and 26 respectively mounted on the facing surfaces of the arms 23 and 24 on the tip end side so as to be able to hold the angle steels 7a and 7b of the guide rail 7, and the arms 23 and 2 respectively.
4 is stretched between the opposing surfaces on the base end side of 4, and is connected to the base end side of each arm 23, 24 with a pressing spring 27 that constantly urges each brake lining 25, 26 on the tip side toward the guide rail 7 side. Toggle links 28 and 29, and toggle link 2
A rod 30 having one end connected to 8, 29 and extending rearward
And a core 31 provided at the intermediate portion of the rod 30 in the longitudinal direction.
And the core 31 while penetrating the end of the rod 30.
And an electromagnetic magnet 32 disposed so as to be able to be attracted in the axial direction. Normally, a braking force is generated by constantly pressing the brake linings 25 and 26 against the guide rail 7 side by the elastic force of the pressing spring 27, When the counterweight 5 is released, that is, when the car 4 is running, the electromagnetic magnet 32 attracts the core 31 to cause the toggle link 2 to move.
8 and 29 are operated to move the arms 23 and 24 to the pins 21 and
Each brake lining 2 by rotating relative to 22
The brake is released by opening 5, 26 against the elastic force of the pressing spring 27.

The brake release device 40 has a first bell crank 41 whose middle portion is pivotally attached to the counterweight 5 side by an axis A and one end of which is connected to a penetrating end of the rod 30 from the electromagnetic magnet 32. A second bell crank 43 having an intermediate portion pivotally attached to the counterweight 5 side by an axis B and having one end connected to the other end of the first bell crank 41 via a first link 42, and an intermediate portion. Is pivotally attached to the counterweight 5 side by a shaft C, one end is connected to the other end of the second bell crank 43 via a second link 44, and the other end is a lever for releasing the rail gripping. A third bell crank 45, which is formed to extend outwardly from the guide rail 7 as 45a, and brackets 46 and 47 on the guide rail 7 above and below in the hoistway 1, respectively.
Pulleys 48, 49 rotatably attached via
An endless wire rope which is wound around each of the pulleys 48 and 49, and has one side of the loop pierced through a through hole 45b formed at the end of the lever 45a of the third bell crank 45 so as to be relatively movable in a non-contact state. 50, an operating piece 51 having a shape engageable with the peripheral edge of the through hole 45b of the lever 45a, and fixed to an upper portion of the lever 45a on the lever penetration side of the endless wire rope 50, and rotation of a pulley 49 below. An operating handle 52 fixed to the shaft is used. When the driving force of the linear motor and the brake releasing force of the electromagnetic magnet 32 are lost due to a power failure or the like, the brake device 20 generates braking force. The brake release of the brake device 20 and the passenger rescue operation work can be performed by operating the.

That is, in order to release the brake of the brake device 20 and the passenger rescue operation at the time of an emergency stop of the car, first, the handlebar 52 is operated to rotate the pulley 49 counterclockwise (FIG. 1) to move the endless wire rope 50. By moving in the same direction, the operating piece 51 is lowered until it engages with the peripheral edge of the through hole 45b of the lever 45a (FIG. 3). When the operating piece 51 and the lever 45a are engaged, the brake release operation is possible. When the operating piece 51 is further lowered by operating the handle 52 from this state, as shown in FIG. 4, the lever 45a, that is, the third bell crank 45 rotates counterclockwise about the axis C, and the second bell crank 45 rotates. The link 44 is pulled to the left and moved. When the second link 44 moves leftward, the second link 44
Bell crank 43 rotates clockwise about axis B,
The first link 42 is pulled downward and moved. When the first link 42 moves downward, the first bell crank 41 rotates clockwise about the axis A and the rod 30
Move by pulling to the right. Since the rod 30 is connected to the toggle links 28 and 29, when the rod 30 moves to the right, the toggle links 28 and 29 narrow the angle formed by these and link the arms 23 and 24 to the pin 2.
The brake springs 27 and 26, which are the holding portions of the guide rails 7, are opened by rotating the pressure springs 1 and 22 relative to the elastic force of the pressure springs 27, and the brakes are released.

Here, the counterweight 5 is normally set to the weight of the car 4 plus one-half the loadable weight. For this reason, when the brake is released as described above, the counterweight 5 rises or falls depending on the loaded load in the car 4, that is, the number of passengers, and the car 4 descends or rises accordingly. Therefore, if the braking force is adjusted by the pulley, that is, the engagement state between the operating piece 51 and the lever 45a is adjusted, the car 4 can be gently lowered or raised, and the car 4 can be landed on the nearest floor.

Example 2. FIG. 5 is a side view showing the overall configuration of a second embodiment in which the elevator brake release device according to the present invention is applied to a linear motor drive type elevator.
In this embodiment, a plurality of pulleys 53, 54, 55, 56 are newly installed in the lower part of the hoistway 1, and one of them, namely, the pulley 55 is arranged near the landing 57, and the pulleys are arranged. The point that an operation handle 58 for moving the endless wire rope 50 is attached to the rotation shaft of 55 is different from that of the first embodiment described above.

In this embodiment, by rotating the pulley 55, the operating piece 51 is moved to move the lever 45a.
Since it is possible to operate the brake and release the brake, there is an advantage that it is not necessary to get down to the pit and the work can be performed by opening the door of the landing 57.

Example 3. FIG. 6 is a perspective view showing an essential part of a third embodiment of the brake releasing device for an elevator according to the present invention. In this embodiment, the endless wire rope 50
Pulley 5 to which the operating handle for moving
9, a reduction gear 61 is coaxially connected to the rotation shaft 60, and the reduction gear 6
The point that the operation handle 63 is attached to the other shaft 62 of 1 is different from that of each of the above-described embodiments.

In this embodiment, the pulley 59 can be rotated with a small force to release the brake of the brake device at the time of the emergency stop of the car and to perform the passenger rescue operation work.

In each of the above-mentioned embodiments, the brake release device of the present invention is used for the elevator in which the brake device is installed on the counterweight side, but the brake device is installed on the car side. Needless to say, the present invention can be applied to the existing elevators, and even in such a case, the same operational effects as the above-described respective embodiments can be obtained.

[0021]

As described above, according to the present invention, the brake device is provided with the lever for releasing the rail holding, and the through hole is formed at the end of the lever, and the through hole is formed in the through hole. A predetermined end portion of the endless wire rope that is movably passed through one end of the endless wire rope that is wound around a plurality of pulleys that are rotatably provided in the hoistway. Since the operating piece for engaging the peripheral edge of the through hole of the lever to operate the lever is provided at the part and the lever is operated to release the brake by the rotation of the pulley, the brake at the emergency stop of the car is provided. There is an effect that cancellation and passenger rescue operation work can be performed safely and easily in the pit without transferring to a counterweight.

[Brief description of drawings]

FIG. 1 is a side view showing the overall configuration of a first embodiment device of the present invention.

FIG. 2 is a plan view showing an enlarged main part of FIG.

FIG. 3 is a front view of FIG.

FIG. 4 is a front view of a state different from FIG.

FIG. 5 is a side view showing the overall configuration of a second embodiment device of the present invention.

FIG. 6 is a perspective view showing a main part of a third embodiment of the present invention.

FIG. 7 is a perspective view showing an overall configuration of a conventional example.

[Explanation of symbols]

 1 hoistway 2 return vehicle 3 main rope 4 car 5 counterweight 6,7 guide rail 20 brake device 40 brake release device 45a lever 45b through hole 48, 49, 53, 54, 55, 56 pulley 50 endless wire rope 51 operation Piece

Claims (1)

[Claims] 1. A car is connected to one end of a main rope wound around a return wheel in the upper part of a hoistway, and a counterweight is connected to the other end of the main rope,
These cars and counterweights are suspended and supported so as to be vertically movable along the guide rails that are erected in the hoistway in a corresponding manner, and the corresponding guide rails are held on the car side or the counterweight side. In an elevator in which a brake device that generates a braking force is installed, the brake device is provided with a lever for releasing the rail holding, and a through hole is formed at the end of the lever, and the through hole is, One end of an endless wire rope wound around a plurality of pulleys rotatably up and down in a hoistway is pierced so as to be relatively movable in a non-contact state, and a predetermined portion on the one side of the endless wire rope A brake release device for an elevator, wherein an operation piece for engaging the peripheral edge of the through hole of the lever and operating the lever is provided on the.