JPH06335229A - Traveling device - Google Patents

Abstract

PURPOSE:To provide a traveling device which has a small drive force, can travel speedily and smoothly, and can automatically stop when the motor stops. CONSTITUTION:An elevator is fixed and laid out in a straight line along the longer direction of a shaft tunnel and a stator 5 with a screw part 5a where the screw locus of a warm wheel is formed in an expanded state and a rotor 6 where a warm gear part 6a engaged to a screw part 5a of the stator 5, a gondola 2 supporting the rotor 6 with a bearing, and a coil 7 and a permanent magnet 9 which are provided at the stator 5 and the rotor 6, respectively, and constitute an electromagnet which is repulsive and is energized in mutually separated directions are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving device utilizing levitation due to magnetic repulsive force.

[0002]

2. Description of the Related Art A moving device for vertically moving a gondola, such as an elevator, is generally of a wire-winding type, which moves the gondola up and down by driving a motor of a winder installed above a shaft tunnel. Balance weights are placed at the ends to maintain balance with the gondola.

[0003]

Although the balance weight can be balanced in this type of elevator by providing the balance weight, the load applied to the motor is large and the cross-sectional area of the shaft tunnel must be large enough to accommodate the wires and the balance weight. In addition to that, a brake mechanism and other safety measures were needed to prevent the wire from falling if it breaks.

As another mechanism, there is a mechanism in which a rack is laid on a steep transfer path and a gear that meshes with the rack is provided on the moving body side. In this mechanism, the moving body falls when the gear is stopped. Instead, it is mainly applied to moving bodies that run on steep slopes such as Apt railways,
In this case, when moving at high speed, noise and vibration due to meshing of gears pose a problem, and it cannot be applied to a moving device for moving at high speed and smoothly.

Therefore, an object of the present invention is to provide a moving device which has a small driving force, can move at high speed and smoothly, and can be automatically stopped on the spot by stopping the motor.

[0006]

In order to achieve the above object, the present invention has a stator having a threaded portion which is fixedly arranged in a straight line along a vertical or steep slope direction and in which a thread locus of a worm wheel is formed in an expanded state. A rotor having a worm gear portion that meshes with the screw portion of the stator; a moving body that supports the rotor as a bearing; and a slant surface of the screw portion and the worm gear portion that rotates the rotor and It is characterized in that a magnet is provided which gives a repulsive or attractive force in the axial direction.

Further, according to the present invention, the stator may be arranged along both sides of the conveying path, and the rotor may be arranged on both sides of the moving body so as to mesh with the stator.

[0008]

According to the above construction, the stator and the rotor provided on the moving body side are not in direct contact with each other due to the magnetic levitation force and are in mesh with each other. The rotor is rotated along the screw locus in a quiet state without generating frictional force, and the movable body is moved along the longitudinal direction of the stator. When the rotation of the rotor is stopped, the rotor is in mesh with the stator, so the moving body stops at that position.

[0009]

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

1 and 2 show an elevator according to the present invention, in which 1 is a shaft tunnel, and 2 is a gondola arranged inside the shaft tunnel 1 so as to be able to move up and down.

Inside the shaft tunnel 1, a pair of guide rails 3 are arranged on the rear side and the front side of both side surfaces as viewed from the opening 2a side of the gondola 2, and guide the gondola 2 so that it can be moved up and down via rollers 4. There is.

At the center of both sides of the gondola 2, stators 5 are fixedly arranged on both side walls of the shaft tunnel 1 along the ascending / descending direction, and correspondingly, rotors 6 are rotatably arranged on both sides of the gondola 2. Has been done.

The stator 5 has a substantially semicircular cross section having a threaded portion 5a formed by unfolding the screw locus of the worm wheel, and its mounting base has the threaded portion as shown in FIGS. A coil 7 forming an electromagnet is embedded in the valley of 5a.

The rotor 6 has a worm gear portion 6a formed on the outer periphery thereof, which is surrounded by the screw portion 5a and meshes with the screw portion 5a. A permanent magnet 9 is integrated with the outer periphery of the gear portion 6a.

The rotor shaft 6b of each rotor 6 is supported by bearing brackets 8a and 8b provided above and below the side of the gondola 2.

The coil 7 constitutes a linear motor with the facing magnet 9 to give a rotational force to the rotor, and the repulsive force or the attraction force between the coil 7 and the magnet 9 causes an upward force to the rotor. Be excited to. Therefore, by energizing, a minute gap is generated between the two in the meshed state, and the gondola 2 is supported in the levitated state.

Then, the rotors 6 rotate forward and backward by the linear motor, and the gondola 2 moves up and down in the shaft tunnel 1 at a speed corresponding to the screw pitch and the number of rotations.
A magnetic repulsive force or an attractive force is generated between the rotor 6 and the stator 5, the rotor receives an upward force by the force, and the gear portion 6a is always separated from the screw portion 5a, which causes friction due to meshing and noise caused thereby. Without this, the ascending / descending operation will be performed smoothly.

Preferably, when the elevator or the like is temporarily stopped, the rotor 6 is excited so that only the rotation of the rotor 6 can be stopped, and the rotor 6 is held in a levitated state even when the rotation of the rotor 6 is stopped. When the coil 7 is demagnetized, the upward force acting on the rotor is erased, but the lower surface of the gear portion 6a is slightly lowered so as to mesh with the screw portion 5a in a contact state, and the stopped state is maintained at that position.

5 and 6 show another embodiment of the present invention. In this embodiment, the magnet 9 is provided on the lower or upper slope of the gear portion 6a, and the coil 7 is provided on the upper or lower slope of the screw portion 5a so that they face each other. This facilitates vertical force. Further, as shown in FIG. 6, the stator may be cylindrical.

Although the present invention is applied to an elevator in the embodiments, the invention is applied to a moving body that moves up and down a vertical or steep slope, or a moving body that surely starts and stops even when the moving body is horizontal. Of course, it can be applied.

Further, the magnet on the stator side is a permanent magnet,
It is possible to use the magnet on the rotor side as a coil, and further to use both as a coil.

[0022]

As described above in detail with reference to the embodiments, in the moving device according to the present invention, the stator and the rotor are not in direct contact with each other due to the magnetic levitation force and are in the meshed state. Even if the rotor is rotated at a high speed, frictional force is not generated between the two, and the moving body can be moved along the longitudinal direction of the stator while the rotor rotates along the screw locus. Can be kept small, and smooth movement is possible without generating vibration or noise.

Further, according to the present invention, the rotor is in mesh with the stator when the rotation of the rotor is stopped, so that the moving body is stopped at that position, and sufficient responsiveness and safety at the time of stop can be secured. Therefore, the present invention is suitable as a moving device that moves on a vertical or steep slope.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing a case where the present invention is applied to an elevator.

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

FIG. 3 is a side sectional view of the relevant part.

FIG. 4 is a plan sectional view of the same main part.

FIG. 5 is a side sectional view of a main part of another embodiment of the present invention.

FIG. 6 is a plan sectional view of the same main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 shaft tunnel (conveyance path) 2 gondola (moving body) 5 stator 5a screw part 6 rotor 6a gear part 7 coil (electromagnet) 9 permanent magnet 10 drive motor

Claims (2)

[Claims] 1. A stator, which is fixedly arranged in a straight line along a vertical or steep slope direction and has a threaded portion in which a screw locus of a worm wheel is formed in an expanded state, and a worm gear portion which meshes with the threaded portion of the stator are formed. A rotor, a moving body that supports the rotor as a bearing, and a magnet that is provided on the inclined surfaces of the screw portion and the worm gear portion and that rotates the rotor and applies a repulsive force or an attractive force in the axial direction of the rotor are provided. Characterized moving device. 2. The stator is arranged along both sides of the conveying path, and the rotor is arranged on both sides of the moving body so as to mesh with the stator.
The described moving device.