JP2705477B2 - Elevator lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift device for a lift having a function of preventing vibration of a gondola in a non-contact manner.

[0002]

2. Description of the Related Art As means for preventing the swing of a gondola of a normal rope-pull type elevator, a guide rail is generally fixedly arranged along a hoistway, while a guide which comes into friction contact with the guide rail is provided on the gondola side. Or it is common to provide a guide wheel and raise or lower the gondola while sliding or rolling these guides on a guide rail. The present applicant has already filed an application for an elevator in which a linear motor is mounted on a side surface of a gondola and used as a low press (JP-A-3-23171).

[0003]

However, in this structure, a frictional force acts between the guide and the guide rail, so that energy loss occurs, and vibration or impact due to backlash due to a gap error between the guide and the guide rail occurs. There were drawbacks. Further, it is necessary to further enhance the safety of the low-press linear motor elevator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to prevent the vibration of a gondola without causing frictional resistance by causing the lifting rail and the lifting member to face each other in a non-contact manner. It is intended to provide a lifting device of a lifting machine described above.

[0005]

In order to achieve the above object, the present invention comprises a plurality of lifting rails fixedly arranged along a hoistway, and a plurality of lifting members moving up and down the hoistway along the hoisting rails. In a lift comprising a stepped gondola, the lift rail is formed in an inverted C shape, and the inverted shape is overlapped and fixed vertically inside the hoistway, and the lift member is a gondola. Magnets projecting to the left and right through the telescopic device on the sides of the arm guide, and having a pair of arms whose left and right ends face the inner surface of the elevating rail, and having the same polarity between the end of the arm guide and the elevating rail. Are arranged facing each other.

[0006]

According to the above construction, the gondola moves up and down along the elevating rail. At this time, when the arm guide comes closest to the elevating rail by the pressing operation of the telescopic device, a force for separating the arm guide is exerted by the magnetic repulsion force, whereby the elevating guide is guided by the elevating rail while maintaining the non-contact state.
Further, since the lifting rail is formed in an inverted C-shape, a levitation force is generated by magnetism, not necessarily by a linear motor. Therefore, the elevator is moved up and down by adjusting the magnetic force or by expanding and contracting the arm guide.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 show the entire structure of the present invention, in which a gondola 2 is disposed inside a hoistway 1 surrounded by a wall having a rectangular cross section.

The hoistway 1 has an opening 1a for each floor and is opened and closed by a door (not shown). Elevating rails 6 are mounted on both sides of the inner surface of the hoistway 1 in an inverted C shape, and are fixed vertically continuously with their lower ends and upper ends overlapping.

On the other hand, a pair of upper and lower telescoping devices 7 are protrudingly arranged on both sides of the hanging frame fitting 3, respectively.
Is opposed to the inside of each of the lifting rails 6.

The telescoping device 7 presses and urges the guide rail 8 toward the lifting rail 6 by a driving device (not shown) having a built-in guide arm 8, and raises the gondola 2 by the reaction force. In addition, when the gondola 2 rises to reach the widest point at the upper end of the lift rail 6, the guide arm 8 is forcibly reduced to adjust the length to fit the narrowest width of the upper lift rail 6. In the meantime, the lower level guide arm is extended to keep the gondola up. When the gondola 2 is lowered, the guide arm 8 is contracted and extended at the time when it passes the lower end of each unit elevating rail.

As shown in FIG. 1 and FIG. 3, a permanent magnet 9 is provided at the distal end of each guide arm 8.
0 are fixedly arranged at predetermined intervals. The magnet 9 of the guide arm 8 faces obliquely downward according to the inclination of the lifting rail 6 and faces the magnet 10 in parallel. The opposing surfaces of the magnets 9 and 10 have the same polarity, and generate a repulsive magnetic force by this polarity, and the guide arm 8 approaches the closest position according to the width of each part of the lifting rail 6 by the balance with the spring pressure. However, it is kept in a non-contact state.

In the above configuration, when a force is applied to the gondola 2 so as to cause the swing in the front-rear direction indicated by the arrow in FIG. 1, the tip of one of the guide arms 2 is moved toward one of the lift rails 6. When approaching, the two magnets 9 and 10 repel each other and try to move away. The magnets 9 and 10 are caused to swing in the opposite direction of the swing of the gondola 2, and the operation is alternately repeated back and forth to the neutral position while canceling and attenuating the vibration. .

However, even in this state, the guide arm 8 and the elevating rail 6 are kept in non-contact, and there is no efficiency reduction or wear due to friction or the like, and no impact is transmitted to the gondola 2 due to contact. It can ensure the safety of the people inside and can provide a sense of security.

Further, when the gondola 2 is stopped, that is, when the guide arm 8 is fixed at the intermediate position, a horizontal component force due to the inclination of the lift rail 6 acts to generate a magnetic levitation force, so that the buffer effect is reduced. Occurs and reduces the shock at the time of stoppage.

An emergency braking device is built in the telescopic device 7, and when the magnetic force is reduced, the guide arm 8 is forcibly stopped from expanding and contracting in the same manner as in a normal stop. It can be dropped and stopped until it abuts, or a separate braking device may be provided for further safety.

Further, a specific mechanism shown in FIGS. 4 (a), 4 (b) and 4 (c) is added for preventing the gondola 2 from swaying left and right.

In FIG. 4 (a), a permanent magnet 9a provided at the tip of the guide arm 8 has a concave cross section, and faces the magnet 10 on the lifting rail 6 side in a surrounding state.
A neutral position is always maintained by generating a repulsive magnetic force not only in the front-back direction but also in the left-right direction. In FIG. 2B, the permanent magnet 9b on the guide arm 8 side has an L-shaped cross section and faces the magnet 10 on the lift rail 6 side, and generates a repulsive magnetic force in the left-right direction as described above. To maintain neutrality. Further, in FIG. 3 (c), the two magnets 9, 10 oppose each other via the mounting brackets 11, 12 at an inclination angle of 45 °.
The horizontal and vertical components prevent vibration in the front-rear and left-right directions.

In this embodiment, the magnet is a permanent magnet. However, an electromagnet may be used to change the magnetic force in accordance with the elevation to facilitate the elevation control, and further to be a linear motor.

[0020]

As described in detail in the above embodiments, in the elevating device of the elevator according to the present invention, the magnetic repulsive force is generated when the arm guide comes closest to the contact position with the elevating rail due to the pressing operation of the telescopic device. The lifting force acts on the lift rail while maintaining the non-contact state, thereby preventing energy loss due to frictional force, vibration due to backlash, and shock from being transmitted to the gondola,
Further efficiency and safety can be increased. Further, since the lifting rail is formed in an inverted C-shape, there is an advantage that a magnetic levitation force is generated at the time of stopping and a buffer effect at the time of stopping is provided.

[Brief description of the drawings]

FIG. 1 is a plan sectional view of an elevator according to the present invention.

FIG. 2 is a side sectional view of the same.

FIG. 3 is an enlarged view of the main part.

FIGS. 4A, 4B, and 4C are partially enlarged views showing a mechanism for preventing left and right swing. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 2 Gondola 6 Elevating rail 8 Guide arm 9, 9a, 9b, 9c, 10, magnet

Claims (1)

(57) [Claims] 1. A lift comprising a lift rail fixedly arranged along a hoistway and a gondola having a plurality of lift members moving up and down in the hoistway along the lift rail. It is formed in the shape of a letter C and is fixed vertically inside the hoistway while overlapping the inverted letter C, and the lifting member projects left and right on the side of the gondola via a telescopic device, and A lift device for a lift, wherein a tip forms a pair of arms facing an inner surface of the lift rail, and a magnet having the same polarity is disposed between the tip of the arm guide and the lift rail.