JP2566855Y2 - Low-press elevator braking system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car braking device provided in a low-press elevator which is driven by a linear motor or the like and raises and lowers a car without using a main rope or a counterweight.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a view showing a conventional low-press elevator described in No. 1; In the figure, a large number of primary coils 2 are vertically arranged on a side wall 1 of a hoistway, and a pair of guide rails 3 are provided. Basket 4 for hoisting in the hoistway
Have a plurality of secondary conductors 5 opposed to the primary coil 2.
Are arranged, and the primary coil 2 and the secondary conductor 5 constitute a linear motor.

[0003] Roller guides 7 that roll along guide rails 3 are installed on the upper, lower, left and right sides of the car 4, and a braking device that operates when the car 4 stops and maintains the stopped state of the car 4 is provided below. 8 are provided. As shown in FIG. 4, in this braking device 8, a braking shoe 9 for gripping the guide rail 3 from both sides is fixed to one end of each lever 10, and each lever 10 is rotatable about a pin 11. Installed.

A compression spring 12 is provided between the other ends of the levers 10.
The brake shoes 9 are pressed against the guide rails 3 by the pressing force of the springs 12. 13 is a rod connected to the other end of each lever 10, and 14 is an electromagnet. When the electromagnet 14 is excited, the rod 13 is attracted and both levers 10 are
, And each brake shoe 9 is separated from the guide rail 3.

Next, the operation of the braking device 8 will be described. When a start command for the car 4 is issued, the braking device 8 is deactivated. That is, the electromagnet 14 is excited, the rod 13 is attracted, and the brake shoe 9 is separated from the guide rail 3. Then, when the car 4 moves up or down and stops at the target floor, the braking device 8 is activated. That is, the electromagnet 14 is de-energized, and each brake shoe 9 grips the guide rail 3 and holds the car 4 in a stopped state. In this manner, the braking device 8 operates so as to maintain the stopped state of the car 4 every time the car 4 stops at the destination floor.

However, in the case of the braking device 8, if the braking device 8 is activated due to a power failure or an abnormality while the car 4 is moving up, the car 4 is suddenly stopped and the passengers in the car 4 are lifted up. There was a risk that the car 4 would collide with the ceiling.

For this reason, conventionally, the traveling direction of the car 4 is detected, and when a braking command is issued while the car 4 is moving up,
The braking device 8 is not operated until the car 4 stops, and the operation of the braking device 8 while the car 4 is rising is prevented. As a measure to prevent the electromagnet 14 from being de-energized due to a power failure and the braking device 8 from operating, it has been considered to use a battery.

[0008]

However, the above-mentioned method requires a special control device for controlling the operation of the braking device 8 according to the traveling direction of the car 4, and also requires a battery. There was a problem. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to prevent an abrupt stop during a climb of a car without using a special control device or a battery.

[0009]

The present invention provides a braking device,
A guide portion having an inclined surface whose upper side facing the guide rail is inclined in the guide rail direction, and a braking shoe arranged on the guide rail side of the guide portion and configured to be easily vertically movable, The guide portion presses the braking shoe against the guide rail.

[0010]

According to the braking device of the present invention, the upper portion of the guide portion facing the guide rail is inclined toward the guide rail, and the braking shoe can easily move up and down. , There is a braking effect on the lowering of the car, but little on the raising of the car. Therefore, it is possible to prevent the car from lowering and to prevent a sudden stop during the raising of the car.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG.
FIG. 4 is a view showing the braking device of the present embodiment, a view corresponding to FIG. 4, and FIG. 2 is a cross-sectional view taken along line AA of FIG. 1. 4, the same reference numerals as those in FIG. 4 denote the same parts, and the guide rail 3 side of the lever 10 constitutes a guide portion 20 which is inclined such that the upper portion approaches the guide rail 3 side.

Reference numeral 21 denotes a guide plate fixed to the guide portion 20, and reference numeral 22 denotes a triangular braking shoe.
3, it is opposed to the inclined surface of the guide portion 20, is guided by the groove 24 engaged with the guide plate 21, and can move up and down. Reference numeral 25 denotes a support bar fixed to the upper end of the brake shoe 22 and penetrating the guide portion 20.
The brake shoe 22 is supported so that it can easily move up and down. When the braking device is not operated, that is, when the guide portion 20 is separated from the guide rail 3, the brake shoe 22 is set so as not to contact the guide rail 3 due to vibration or the like during operation of the car 4. Have been.

The operation of the embodiment will be described. Basket 4
Is issued, the electromagnet 14 attracts the rod 13, compresses the spring 12, and moves the guide portion 20 away from the guide rail 3, whereby the brake shoe 22 separates from the guide rail 3. Then, when the car 4 moves up or down and stops at the target floor, the electromagnet 14 is de-energized, and the spring 12 causes the guide portion 20 to move in the direction of gripping the guide rail 3. For this reason, the brake shoe 22 is pushed by the guide portion 20 and grasps the guide rail 3 to keep the car 4 in a stopped state.

Next, a description will be given of a case where the braking device operates due to a power failure or the like while the car 4 is moving up and down. First, when the braking device operates while the car 4 is descending, the guide unit 20 moves in the direction of gripping the guide rail 3. This allows
The brake shoe 22 is pressed against the guide rail 3. When the car 4 further descends, the guide portion 20 attached to the car 4 also descends, so that the brake shoe 22 bites between the inclined portion of the guide portion 20 and the guide rail 3 to prevent the car 4 from descending. .

Conversely, when the braking device is operated while the car 4 is being raised, the guide portion 20 moves in the direction of gripping the guide rail 3 as described above, and the brake shoe 22 is pressed against the guide rail 3. However, when the car 4 rises, the guide part 20 also rises. For this reason, the braking shoe 22 configured to be able to easily move up and down relatively lowers, and the pressing force of the braking shoe 22 against the guide rail 3 by the guide portion 20 is eliminated.
Never stop suddenly.

In this case, the car 4 loses its driving force due to a power failure or the like, and the ascending speed eventually becomes zero due to natural deceleration due to gravity. Thereafter, when the car 4 attempts to move in the descending direction, the braking shoe 22 bites between the guide portion 20 and the guide rail 3, and the car 4 is prevented from descending.

As described above, according to the present embodiment, it is possible to prevent an abrupt stop during the ascent of the car without using a special control device or battery. In the above embodiment, the electromagnet 14 is used. However, the present invention is not limited to this, and another method such as a hydraulic method may be used.

[0018]

[Effects of the Invention] As described above, according to the present invention,
Because it is possible to prevent a sudden stop during the raising of the car without using a special control device or battery,
It is possible to avoid a situation in which the passenger in the car rises and collides with the car ceiling.

[Brief description of the drawings]

FIG. 1 is a diagram showing a braking device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view showing a conventional low-press elevator.

FIG. 4 is a diagram showing a conventional braking device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side wall of hoistway 2 Primary coil of linear motor 3 Guide rail 4 Basket 5 Secondary conductor of linear motor 8 Braking device 9,22 Brake shoe 10 Lever 20 Guide part

Claims (1)

(57) [Scope of request for utility model registration] 1. A low-press elevator that is driven by a linear motor or the like and raises and lowers a car along a guide rail without using a main rope and a counterweight. the apparatus was placed in the car, the brake device includes a guide portion having an inclined surface on the side upper inclined guide rails direction opposite the guide rail,
It is located on the guide rail side of the above guide part and easily moves up and down
Capable and a configured brake shoe, the guide portion
By pressing the brake shoe in the guide rail direction
The brake shoe is characterized in that it is a configuration that will be held between the guide portion and the guide rail I b - the press elevator braking device.