JP2648511B2 - Dust proof device for linear motor driven elevator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof device for an elevator driven by a linear motor, and more particularly to a dustproof device for a linear motor when a primary conductor and a secondary conductor constituting the linear motor are relatively linearly moved. The present invention relates to a dust-proof device for preventing dust from entering a vehicle.

[Prior Art] In a linear motor driven elevator, in order to realize relative linear motion of a primary conductor and a secondary conductor constituting a linear motor, a slight distance is provided between opposing surfaces of the primary conductor and the secondary conductor. , A so-called air gap is provided. In the case of a linear motor having a maximum loading capacity of 600 kg shown in FIG. 1, the air gap is set to 2 mm. However, in the case of the conventional linear motor driven elevator, a method of performing a linear motion while closing the air gap has not been adopted.

[Problems to be Solved by the Invention] Therefore, in the case of the above-described conventional linear motor drive type elevator, dust adheres to the induction coil on the primary conductor side due to dust or the like entering from the air gap, and the drive performance of the linear motor is reduced. Deterioration or heat generated in the induction coil may cause the induction coil to burn. Further, at the time of a natural disaster such as an earthquake, concrete fragments of a building or the like may enter between the primary conductor and the secondary conductor, and may damage the induction coil or damage the outer peripheral surface of the secondary conductor.

A first object of the present invention is to prevent dust from entering from an air gap provided between a primary conductor and a secondary conductor during a relative linear movement of a primary conductor and a secondary conductor of a linear motor driven elevator. To provide a dust-proof device for the purpose.

A second object of the present invention is to provide a dust device capable of performing a linear motion while wiping dust or the like adhered to an outer peripheral surface of a secondary conductor.

[Means for Solving the Problems] To achieve the above object, according to the present invention, there is provided a cylindrical secondary conductor, and a cylinder penetrated by the secondary conductor and movable along the secondary conductor. A dustproof device for preventing dust from entering into a gap formed between the primary conductor and the primary conductor, provided at least at the upper end of upper and lower ends of the primary conductor and in contact with the outer peripheral surface of the secondary conductor In this way, the inner peripheral portion and the outer peripheral portion are made of different materials, and the inner peripheral portion and the outer peripheral portion are integrally formed. This dustproof device comprises an inner peripheral portion and an outer peripheral portion made of different materials, and it is preferable that the inner peripheral portion and the outer peripheral portion are integrally formed. For example, the material of the inner peripheral portion is made of felt, the material of the outer peripheral portion is made of rubber, and the outer peripheral portion made of this rubber is fixedly supported on both end surfaces of the primary conductor. When the dust-proof device is in the form of a loop, one part of the dust-proof device is cut, and this cut portion is slightly widened, and can be easily wound around the outer periphery of the secondary conductor and attached to the end surface of the primary conductor. Shall be used. Further, it is preferable that the cut portion is cut so that the cut surface is inclined with respect to the linear movement direction.

[Operation] According to the dustproof device configured as described above, it is possible to perform linear motion while closing the air gap between the primary conductor and the secondary conductor with dustproof devices attached to both end surfaces of the primary conductor. Further, at the time of the linear movement, dust attached to the outer peripheral portion of the secondary conductor can be removed by the dustproof device.

[Example] An example will be described with reference to the drawings. FIG. 1 is a schematic sketch of an elevator using a cylindrical linear motor, and an elevator car 1 is attached to one end of a rope 3 by a rope fixed end 2. Fixed. The other end of the rope 3 is fixed to a rope fixed end 7 fixed to the upper end of the counterweight 6 via a first sheave 4 and a second sheave 5 rotatably supported on the upper part of the building. The first sheave 4 and the second sheave 5 are each supported by a sheave shaft support member 9 of an elevator machine room via a sheave shaft 8. The car 1 has car guide rollers 11 attached to both sides thereof and engaging with car guide rails 10. On the other hand, the counterweight 6 has a counterweight guide roller 13 that engages with the counterweight guide rail 12. The counterweight 6 corresponds to a secondary conductor (stator) of a linear induction motor whose both ends are supported by an upper end support 15 fixed to a ceiling beam 14 and a lower end support 17 fixed to a floor frame 16. It is installed so as to make a linear motion in the vertical direction along the column 18. Reference numeral 19 denotes a primary conductor (movable element) of a linear motor. In the case of the linear induction motor shown in this embodiment, the secondary motor is a linear motor in which the secondary conductor is held at the installation position and only the primary conductor makes a linear motion. In FIG. 1, the primary conductor
An annular member supported at both ends of the 19 is the dustproof device 100 of the present invention.

As apparent from FIGS. 2 and 3, the dustproof device 100 of the present invention includes a pair of mounting members 120 and an annular member 130 formed by an outer peripheral portion 131 and an inner peripheral portion 132. I have. In order to attach the dustproof device 100 to the distal end surface 19A of the primary conductor 19, the mounting bracket 120 and the annular member 130 have screw holes for mounting with four screws 110. At one position of the annular member 130, a cut portion 133 having a cut surface parallel to the axial direction of the column 18 of the secondary conductor is provided. This cutting part 1
33 is further expanded, and the annular member 130 is wound around the outer periphery of the column 18 relatively easily.
100 can be attached. Cutting section 133 shown in FIG.
Is formed in parallel to the axial direction of the column 18, but by cutting this cut surface obliquely as shown by a two-dot chain line, when the annular member 130 is cut into the end surface 19A of the primary conductor, The surfaces are crimped to more reliably close the gaps and prevent dust from entering.

FIG. 4 is a partial cross-sectional view of FIG. 2, and clearly shows a mounting cross section of the dustproof device of the present invention. The inner peripheral surface of the annular inner peripheral portion 132 made of felt is
Abuts the outer peripheral surface of the column 18 to prevent dust from entering, and at the time of linear movement of the primary conductor in the vertical direction, the annular inner peripheral portion 132 has an action of removing dust attached to the outer peripheral surface of the column 18. Fulfill.

FIG. 5 is a modification of the annular dustproof device shown in FIG. 4, and shows a case where the cross-sectional shape of the inner peripheral portion 132 is different from that of FIG. As is apparent from FIG. 5, the upper end of the inner peripheral portion 132 has a tapered surface, and when the primary conductor 19 linearly moves along the axial direction of the column 18, the column
The dust adhered to the outer peripheral surface can be removed.

2, 4 and 5 show the dustproof device 10 of the present invention.
Although the case where 0 is attached to the upper end surface of the primary conductor 19 is shown, it is also assumed that 0 is attached to the lower end surface of the primary conductor 19 in the same manner. Thus, by providing the dustproof device 100 on both end surfaces of the primary conductor 19, it is possible to reliably prevent dust from entering from the air gap between the primary conductor 19 and the secondary conductor 18.

The present invention particularly describes an annular dustproof device attached to a cylindrical primary conductor that performs a linear motion with a slender cylindrical secondary conductor as a sliding axis in the embodiments, but the present invention relates to this annular dustproof device. The present invention is not limited to the device. For example, when the secondary conductor has a square cross section, a dustproof device having a square inner peripheral surface shape along the outer peripheral surface of the square may be used. As such, the present invention may be embodied in various other forms without departing from its spirit or essential characteristics.

[Effects of the Invention] The present invention is configured as described above, and has the following effects.

The air gap between the primary conductor and the secondary conductor can be closed by dustproof devices attached to both ends of the primary conductor, and dust can be reliably prevented from entering the inside of the linear motor. Further, the primary conductor can linearly move while efficiently removing dust adhering to the outer peripheral surface of the secondary conductor, which easily enters the inside of the linear motor. As described above, by using the dust device of the linear motor drive type elevator according to the present invention, it is possible to prevent burning of the linear motor due to dust that has entered the inside of the linear motor or deterioration of the driving performance of the linear motor.

Further, by replacing the consumable parts of the dustproof device relatively easily, the number of times of cleaning the inside of the linear motor, which involves a large-scale attaching and detaching operation of the linear motor, can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic sketch of a linear motor driven elevator, FIG. 2 is an assembly sketch in which a dustproof device of the present invention is attached to the upper end surface of a primary conductor, and FIG. 3 is a schematic sketch of FIG. FIG. 4 is an exploded view of the dustproof device of the present invention, and FIG. 4 is a cross-sectional view in a state where the dustproof device shown in FIG. 2 is assembled;
FIG. 5 is a cross-sectional view showing a modification of the dustproof device shown in FIG. (Brief description of reference numerals) 1 ... Cage, 2,7 ... Rope fixed end, 3 ... Rope, 4
... 1st sheave, 5 ... 2nd sheave, 6 ... counterweight, 8 ... sheave shaft, 10 ... car guide rail, 11
…… Cage guide roller, 12 …… Balance weight guide rail, 13
…… Balance weight guide roller, 18 …… Secondary conductor, 19 …… Primary conductor, 100 …… Dustproof device, 120 …… Mounting bracket, 130 ……
An annular member.

Claims (4)

(57) [Claims] 1. Dust intrudes into a gap formed between a cylindrical secondary conductor and a cylindrical primary conductor penetrated by the secondary conductor and movable along the secondary conductor. It is a dustproof device for preventing, provided at least at the upper end of the upper and lower ends of the primary conductor to be in contact with the outer peripheral surface of the secondary conductor, the material is composed of different inner and outer peripheral parts,
A dustproof device for a linear motor driven elevator, wherein the inner peripheral portion and the outer peripheral portion are integrally formed. 2. A dustproof device for a linear motor driven elevator according to claim 1, wherein said inner peripheral portion is made of felt and said outer peripheral portion is made of rubber. 3. The primary conductor is formed in a loop shape having one cut portion, and can be provided on at least upper ends of upper and lower ends of the primary conductor so as to be wound around an outer peripheral portion of the secondary conductor. A dustproof device for a linear motor driven elevator according to claim 1. 4. A dustproof device for an elevator driven by a linear motor according to claim 3, wherein a cut surface of said cut portion is inclined with respect to a direction of linear movement.