JPH04182293A - Braking device for linear motor type elevator - Google Patents

Abstract

PURPOSE:To reduce the vibration of a cage to improve the comfortableness of riding by providing a braking device for applying the braking force to a guide rail of a balance weight, and providing a vibration damping device for applying the friction force to the guide rail in the cage. CONSTITUTION:A contact point 10 is closed in ordinary, and a braking relay 11 is energized to maintain the non-operation condition of a braking device 9. A relay 13 for a vibration damping device is also energized, and a coil 12h of an electromagnet 12g is energized to attract a plunger 12f, and one end of levers 12a, 12a are moved to the direction for closing braking shoes 12c through links 12e, resisting the force of a presser spring 12d, and the other end of the levers 12a, 12a are moved to the direction for opening the braking shoes 12c. Drive of a linear motor 8 is stopped by the command for emergency stop, and the contact point 10 is opened, and the braking relay 11 is deenergized to operate the braking device 9, and a balance weight 2 is stopped. Simultaneously, the relay 13 for the vibration damping device is de-energized to de-energize the coil 12h of the electromagnet 12g, and the braking shoes 12c are pressed to a guide rail 5 by the presser spring 12d to damp the vibration of the cage 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a device for braking an elevator driven by a linear motor.

[Prior Art] FIGS. 4 and 5 are diagrams showing a conventional braking device for a linear motor elevator disclosed in, for example, Japanese Patent Application Laid-Open No. 1-271381, and FIG. 4 is a diagram showing the main part configuration; FIG. 5 is a circuit diagram of the brake device.

In Figure 4, (1) is the elevator car, (2) is the counterweight, and (3) is the main rope that connects the heel (1) and the counterweight (2), and is attached to the top of the hoistway. It is wrapped around an installed pulley (4). (5) is a guide rail installed in the hoistway, (6) is a guide shoe that is installed on the heel (1) and engages with the guide rail (5) to guide the heel (1), (7) is the hoistway Counterweight (2) erected on
The guide rail (8) is a linear motor that guides the stator (8A) installed on the hoistway and the counterweight (2).
) consists of a mover (8B) installed in the (9)
This is a brake device installed on the counterweight (2) and frictionally engaged with the kite rail (7).

In Fig. 5, (+) and (-) are DC power supplies, (10) is an emergency stop detection contact that is closed during normal times and opens during emergency stop, and (11)
) causes frictional engagement of the brake device (9) when energized.
This is a brake relay that engages frictionally when it is released and deenergized.

A conventional braking device for a linear motor elevator is constructed as described above, and the car (1) is driven by a linear motor (
8) by driving the counterweight,
The car (1) and the counterweight (2) are guided by kite rails (5) and (7), respectively, to ascend and descend.

Under normal conditions, the emergency stop detection contact (10) is closed, the brake relay (11) is energized, and the braking mechanism (not shown) of the brake device (9) remains inactive and the suspension is suspended. This is done so that there is no hindrance to the lifting and lowering of the counterweight (2). When an emergency stop command is issued, the driving of the linear motor (8) is stopped, the contact (10) is opened, and the brake relay (11) is deenergized. Now, the braking mechanism is activated, and a braking force is applied between the guide rail (7) and the counterweight (2) to stop, and the balance weight (2) is stopped via the main rope (3).
1) is also stopped.

[Problems to be Solved by the Invention] In the conventional braking device for a linear motor elevator as described in item 1, the counterweight (2) is braked and the main rope (3) is
), the long main rope (3) is interposed between the brake device (9) and the heel (1), and the car (1) - main rope (3) is stopped. ) The system composed of the single counterweight (2) is a so-called soft system with a small natural frequency.

Therefore, due to the emergency stop, a sudden braking force is applied to the counterweight (2), and the counterweight (2) moves to the guide rail (
7), the main rope (3) repeatedly expands and contracts, causing the heel (1) at the other end of the main rope (3) to swing significantly, causing discomfort to passengers. As a countermeasure to this problem, it is possible to install a brake device (9) on the car (1) instead of the counterweight (2) and hold the car (1) directly on the guide rail (5). At this time, the brake device (9) must be opened to carry out the work, and the safety of the maintenance work is lost.

This invention was made to solve the above problems, and is a linear motor type elevator that can prevent large shaking of the car even when the car suddenly stops.
The purpose of this invention is to provide a braking device for

[Means for Solving the Problems] A braking device for a linear motor elevator according to the present invention is such that a braking device is provided on a counterweight, and a vibration damping device is provided on a car.

[Function] In this invention, since the vibration damping device is installed in the car, the vibration transmitted to the car due to the sudden stop of the counterweight is damped by the vibration damping device.

[Embodiment] Figs. 1 to 3 are diagrams showing an embodiment of the present invention, in which Fig. 1 is a configuration diagram of main parts, Fig. 2 is a sectional view taken along the line ■-■ of Fig. Figure 3 is a circuit diagram of the brake system, and parts similar to the conventional system are designated by the same symbols.

In Figures 1 and 2, (12) is a vibration damping device installed on the heel (1), (12a) and (12a) are pins (], 2b) placed opposite each other and fixed to the basket (1). Levers pivoted to each other, with a brake shoe (1,
2c) is fixed, and the brake shoe (12c) faces the side of the guide rail (5). (12d) is the lever (
12a) A lever (12a) provided between (12a)
(12a) is a push spring that applies force in the direction of closing the end (hereinafter referred to as one end) on the guide rail (5) side; (12e) is a link connected to the other end of the lever (12a) (], 2a); (12f) is a plunger coupled to a link (12e), and (12g) is an electromagnet having a coil (12h) fixed to the heel (1) and attracting the plunger (12f).

In Fig. 3, when (13) is energized, it energizes the coil (12h) of the electromagnet (12g), and when it is deenergized, the coil (12h) is energized.
h) is a relay for a vibration damping device that deenergizes.

In the brake system for a linear motor elevator configured as described above, the contact (10) is normally closed, the brake relay (11) is energized, and the brake system ( 9) remains inactive. Further, the vibration damping device relay (13) is also energized, and the coil (12h) of the electromagnet (12g) is energized. Now, the electromagnet (12g) attracts the plunger (12f): Renosu (12a) (1
The other end of the lever (12a) moves in the closing direction against the force of the push spring (12d), and one end of the lever (12a) (12a), that is, the brake shoe (12c) moves in the opening direction. ]) There is no problem in going up and down.

Here, when a safety circuit (not shown) or the like is activated and an emergency stop is commanded, the linear motor (8) is driven or stopped. Next, the contact (10) is opened, the brake relay (1]) is deenergized, and the brake device (9) is deenergized as described above.
) operates to stop the counterweight (2). At the same time, the vibration damping device relay (13) is also deenergized, and the coil (12h) of the electromagnet (12g) is deenergized.

Now, the force of the push spring (12d) will push the brake shoe (12c)
is pressed against the guide rail (5), and due to the frictional force,
The vibrations of the car (1) are damped. The vibration damping device (12) does not require any gripping force for the brake device (9), and the strength of the push spring (12d) is determined by compressing the guy 1 to the rail (5) with the brake shoe (12c). It is enough to dampen the vibration.

In the above embodiment, the vibration damping device (12) is installed separately from the guide shoe (6), but it is also conceivable that the guide shoe also serves as the brake shoe (12c) of the vibration damping device (12).

[Effects of the Invention] As explained above, in this invention, a brake device is provided on the counterweight, and a vibration damping device is installed on the car, so that vibrations transmitted to the car due to a sudden stop of the counterweight are damped. This damping device has the effect of reducing the sway of the car and improving ride comfort.

[Brief explanation of drawings]

1 to 3 are diagrams showing an embodiment of the present invention, in which FIG. 1 is a configuration diagram of main parts, FIG. 2 is a sectional view taken along line II-n in FIG. 1, and FIG. 3 is a flake device. 4 is a circuit diagram of a conventional linear motor elevator braking device.
FIG. 5 is a circuit diagram of the brake device shown in FIG. 4. In the diagram, (1) is the cage, (2) is the counterweight, (3) is the main rope, (4) is the pulley, (5) and (7) is the kitrail.
(8) is a linear motor, (8A) is a stator, (8B) is a movable element, (9) is a brake device, and (12) is a vibration damping device. Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Claims] A car and a counterweight are connected to both ends of the main rope wrapped around a pulley installed at the top of the hoistway, and guide rails are installed to guide them. The car has a stator of a motor and a mover of a linear motor provided on the counterweight, and is provided with a brake device that applies a braking force to the guide rail on the counterweight, A braking device for a linear motor elevator, characterized in that a vibration damping device is installed to apply a frictional force to the guide rail.