JPH072458A - Linear motor elevator with hybrid lobing means and stationary primary element - Google Patents

Abstract

PURPOSE: To reduce volume inside a hoistway required for linear motor elevator. CONSTITUTION: A linear motor elevator device has an car 10 mechanically connected to a balance weight assembly 20 so that a roping ratio of the car 10 becomes smaller than a roping ratio of the balance weight assembly 20. A primary element of a linear motor is arranged on a wall or inside of a hoistway 30 related to a secondary element of the linear motor. The balance weight assembly 20 includes the motor secondary element. The elevator device reduces the volume of the inside of the hoistway 30 occupied by primary and secondary members of the linear motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator system, and more particularly to an elevator system driven by a linear motor.

[0002]

2. Description of the Related Art A linear motor drive type elevator apparatus is known. For example, US Pat. No. 4,402,386.
No. 5,005,672, 5,033,588,
See 5,062,501, 5,074,384. These devices have multiple walls. These walls form a hoistway associated with an elevator lift and a number of guide rails on which balance weights are slidably mounted. The balance weight assembly includes a primary element of the linear motor and a balance weight, all properly mounted inside the frame. The secondary element of the linear motor is located inside the hoist passage. The secondary element extends a vertical distance (ie, having a height dimension) that is substantially equal to the maximum height of the hoist passage. The roping device mechanically connects the lift chamber to the balance weight assembly so that the total travel distance of the lift chamber in one direction is equal to the total travel distance of the balance weight in the opposite direction.
The primary element receives electrical energy from the AC power source through the mobile power cable and electromagnetically cooperates with the secondary element to move the balance weight assembly vertically (up / down) along the guide rail.

US Pat. No. 4,570,753 teaches a linear motor elevator having a fixed primary element fixed to the hoist passage wall and a movable secondary element fixed to a balance weight assembly. The total moving distance of the lifting chamber is equal to the total moving distance of the secondary element. To efficiently and economically use building space, elevator installation designers strive to reduce the volume of interior hoist passage interior required by elevator installations. U.S. Pat. No. 5,036,954 teaches a traction elevator system having a hybrid roping where the lift roping ratio is less than the balance weight assembly roping ratio. The distance traveled by the bunlas weight assembly here is less than the distance traveled by the elevator during normal operation of the elevator installation. During normal operation of the tow elevator system, the volume inside the hoist passageway required by the balance weight assembly is reduced. The known devices continue to occupy a large volume of building space and are therefore not entirely satisfactory. The present invention reduces the volume occupied by a linear motor elevator system.

[0004]

SUMMARY OF THE INVENTION It is a primary object of the present invention to reduce the volume inside the hoist passageway required by members of a linear motor elevator installation. Another object of the present invention is to reduce the height dimension of the secondary element in a linear motor elevator installation. Yet another object of the present invention is to reduce the total travel distance of the balance weight assembly in a linear motor elevator installation. According to the invention, the elevator installation comprises a linear motor and a hybrid roping arrangement. The hybrid roping device is formed such that the lifting chamber roping ratio is smaller than the balance weight assembly roping ratio. Preferably, at least a portion of the primary element of the motor is located in a recess formed in the hoist passage wall associated with the linear motor. All the primary elements of a single-sided linear motor are fixed inside this recess. The Banglathwaite Seven-Li has the secondary element of the linear motor. Also,
The present invention uses a tubular linear motor.

The elevator system of the present invention reduces the volume inside the hoist passageway required by the linear motor. The height dimension of the secondary element is substantially less than the maximum height of the hoist passage. The total travel of the balance weight assembly is substantially less than that of the lift chamber. Furthermore, according to the present invention, the mobile power cable can be eliminated because the primary element and the electrical energy source can be easily electrically connected. Other objects of the present invention will be readily apparent with reference to the following detailed description in conjunction with the accompanying drawings.

[0006]

1 shows an elevator installation according to the invention. The elevator room 10 includes a hybrid roping device 12
Mechanically connected to the bunlas weight assembly 20 by a, 12b, 12c and 14. The hybrid roping device has pulleys 12a, 12b, 12c and a suspension rope 14. One end 14a of the rope 14
Is suitably secured to the upper or ceiling wall W (eg, by bolts not shown) through the hoist passageway or wall surface 30c of the elevator shaft 30 (discussed below). The other end 14b of the rope 14 is appropriately fixed to the elevating chamber 10. Pulley 12a is secured to balance weight assembly 20 by conventional means. The pulleys 12b and 12c are suitably rotatably fixed on a cross member 16 which is fixed to the side wall W in a known manner, for example. The rope 14 has a pulley 1 so that the lifting chamber roping ratio becomes smaller than the balance weight roping ratio.
It passes around 2a, 12b, and 12c. More preferably, the balance weight assembly roping ratio is 2: 1.
While the lift chamber roping ratio is 1: 1. However, other hybrid roping ratios are also within the scope of the invention where the lift chamber roping ratio is less than the balance weight assembly roping ratio. In normal operation,
The lift chamber 10 moves a total distance 2D (shown between dashed lines) while the balance weight assembly 20 moves a total distance D.

A linear motor (eg flat single sided type) comprises a primary element P which is spaced from a secondary element S (eg formed in parallel pipe configuration) by a substantially constant air gap G. The balance weight assembly 20 is attached to the secondary element S and the secondary element S appropriately (for example, fixed).
A balance weight CW is provided. Desirably, the secondary element S has a height dimension (H) in the range of 1.1D to 1.5D. The secondary element S is solid and is made of some electrically conductive material such as copper or aluminum. The secondary element S has a back plate BP of suitable magnetic material (e.g. iron) to efficiently return the magnetic flux to the primary element. The weight of the balance weight assembly 20 is preferably approximately doubled (the weight of the empty lift chamber 10 plus 40-50% of the lift load of the lift chamber). As previously mentioned, a plurality of walls W (eg, cement) forming part of the building are associated with the lift, hybrid roping device, and balance weight assembly. The wall W has a hoistway 3 having a maximum height of approximately 2.5D.
0 is formed (pit height is not included). One of the walls W has a surface 30a that faces the inside of the hoist passage 30 and preferably has a surface 30b that forms an open cavity or recess R in the direction towards the inside of the hoist passage 30. . As shown in FIG. 1, all motor primary elements P are arranged in the recess R. A bracket (not shown) or other suitable means for securing the primary element in the recess can be used. Desirably, the dimension of the depression is slightly larger than the outward dimension of the primary element P. The recesses, the primary and the secondary elements are such that the primary element cooperates with the secondary element S in a suitable electromagnetic manner to balance the weight assembly 20 during normal operation of the elevator system.
Are arranged and sized to be pressed vertically. As shown in FIG. 1, the center of the surface of the primary element facing inwardly of the hoist passage is located at a distance of approximately 1.25D on the vertical direction of the hoist passage wall surface 30a. The total height dimension of the primary element will be in the range of approximately 0.1D to 0.5D.

The motor primary element P includes a core of magnetic material and a winding of electrically conductive material associated with the core. FIG. 1 shows, for example, a core of a grooved iron layer 40 and a number of grooved embedded windings 42. Winding 42 is 3
It is electrically connected to the inverter 28 (FIG. 2) by the phase AC power cable 26. More preferably, substantially all the primary elements P are arranged inside the recess R. However, according to the particular type of linear motor utilized in the present invention, a portion of the primary element may extend beyond the wall surface 30a. FIG. 5 (a) shows a tubular linear motor with a tubular primary element PP forming a channel therethrough. The primary element PP surrounds a tubular secondary element SS slidably disposed in the channel and suitably spaced from the primary element by a void (eg, FIG. 6). The secondary element is attached to the balance weight CWW. The primary element is
It is only partly arranged in the recess R so that the secondary element can move vertically through this primary element.
The bracket BB fixes the primary element PP to the wall surface 30b. By arranging at least a part of the motor primary element P, PP inside the recess R of the wall, that part of the primary element during normal operation of the elevator installation is
Moved from either interface using movement of the balance weight assembly 20, 20 '.

The lifting chamber 10 and the balance weight assemblies 20, 20 'are slidably mounted on each guide rail (not shown) by means of known means, so that the hoist passage 30 is lifted. And can be moved as guided below. Also, the guide rails for the balance weight assemblies 20, 20 'allow the motor secondary elements S, SS to maintain a substantially constant air gap G between the secondary elements S, SS and the primary elements P, PP. it can. Optionally, the balance weight assemblies 20, 20 ″ can use rollers (not shown) and / or guide rails to maintain the air gap substantially constant. Various guide rails, rollers, and pulley devices are generally known in the art. For example, US Pat. No. 4,949,815, 5,005,6, incorporated herein by reference.
72, 5,014,826, 5,033,588
See also the known linear motor elevator of FIG. A buffer portion (not shown) is arranged on the bottom surface 30d of the pit, and the lifting chamber and / or the cable 1 is provided.
4 It absorbs the downward force of the balance weight assembly when it breaks.

FIG. 4 shows three embodiments of the motor secondary element S. In one preferred embodiment useful in the device of Figure 1, the secondary element S comprises an aluminum or copper sheet fixed to an iron back plate BP. In FIG. 5 and FIG. 6, the secondary element SS
Has, for example, a cylindrical core closely enclosed by a sleeve (or sheet) of aluminum or copper. In the present invention, special dimensions and materials for the various secondary and primary elements are well within the purview of those skilled in the art. Various types of linear motors can be utilized with the present invention. For example, flat, tubular, single or double sized linear induction or linear synchronous motors may be utilized. See, for example, "Linear Ele by SA Nasar and I. Boldea, which are incorporated herein by reference.
ctric Motors: Theory, Design, and Practical Applica
tions "(1987, Prentice-Hall, Inc.) Chapters 1-5. Finally, if the hybrid roping system connects the secondary element to the elevator chamber, it will It is possible to achieve some of the advantages of the invention without even placing parts inside the recess of the wall of the hoist passage, in this embodiment the motor primary element is fixed to the surface of the wall. For example, in FIG.
Surface 3 of hoist passage wall by bracket B in (b)
Tubular linear motor primary element P fixed at 0aa
See P. See also the flat double sided linear motor primary element having two core portions P'spaced from the secondary element S'by a gap G'in FIG. One core portion P'is fixed to the wall surface 30aa, and the other core portion is fixed to a fixed rail fixed to the hoist passage.

While we have disclosed the invention as considered a more preferred embodiment of the invention, various modifications and variations can be made without departing from the scope of the invention, which should be limited only by the claims.

[Brief description of drawings]

FIG. 1 is a side view of an elevator apparatus according to the present invention including a flat single-sided linear motor and hybrid roping.

2 is an inverter and A for the linear motor of FIG.
The figure which shows C power supply.

FIG. 3 is a partial side view of the balance weight assembly and the primary element of the flat double sided linear motor elevator apparatus of the present invention.

FIG. 4 shows front and side views of various secondary elements for the motor of FIGS. 1 and 3.

FIG. 5 relates to an embodiment utilizing a tubular linear motor,
A balance weight assembly with an alternative mounting device,
Secondary element (part not shown), partial side view of the motor primary element.

FIG. 6 relates to an embodiment utilizing a tubular linear motor,
The top and side view of a motor primary element which surrounds a motor secondary element.

FIG. 7 is a front and side view of a tubular motor elevator installation with a moving primary element according to the prior art.

[Explanation of symbols]

 10 Lifting room 20 Balance weight device

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[Procedure amendment]

[Submission date] August 16, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (20)

[Claims] 1. An elevator apparatus comprising: an elevator chamber; a balance weight device including a motor secondary element; and a roping device connecting the elevator chamber to the balance weight assembly, wherein the roping device is a roping device for the elevator chamber. Ratio and the roping ratio of the balance weight assembly, wherein the roping ratio of the lift chamber is smaller than the roping ratio of the balance weight assembly, so that the balance weight assembly can be operated during normal operation of the elevator apparatus. The total travel distance is less than the total travel distance of the lift chamber, and the at least one wall is associated with the balance weight assembly, provided that the wall defines a recess that is generally open toward the balance weight assembly. Is placed in the recess A motor primary element having one portion even without, however, the motor secondary element, the elevator apparatus characterized by comprising a are spaced apart by a substantially constant gap from the motor primary elements. 2. The elevator installation according to claim 1, wherein the motor primary elements are all arranged inside the recess. 3. The elevator apparatus according to claim 2, wherein the motor secondary element has a sheet that is an electrically conductive substance. 4. The elevator installation according to claim 3, wherein the electrically conductive material is aluminum. 5. The elevator installation according to claim 3, wherein the electrically conductive material is copper. 6. The elevator installation according to claim 3, wherein the motor secondary element further comprises a back plate of magnetic material secured to the seat. 7. The elevator apparatus according to claim 1, wherein the lifting chamber has a roping ratio of 1: 1 and the balance weight assembly has a roping ratio of 2: 1. 8. The elevator installation according to claim 1, wherein the motor primary element is fixed in the recess. 9. The elevator installation of claim 1, wherein the balance weight assembly consists essentially of a motor secondary element. 10. The elevator apparatus according to claim 1, wherein the motor secondary element has a height (H) larger than the total moving distance of the balance weight assembly and smaller than the total moving distance of the lifting chamber. Elevator device having. 11. The elevator apparatus according to claim 10, wherein the height of the motor secondary element is 1.1D.
An elevator installation having a height in the range of ~ 1.5D, where D is equal to the total travel of the balance weight assembly. 12. The elevator apparatus according to claim 10, wherein the height (H) of the motor secondary element is D.
An elevator installation that is greater than and less than 1.5D, where D is equal to the total travel of the balance weight assembly. 13. The elevator installation according to claim 10, wherein the motor primary element is formed in a parallel pipe configuration having a plurality of grooves and a number of electrical windings arranged inside these grooves. Elevator apparatus with a fixed core part. 14. An elevator apparatus comprising: an elevating chamber, a balance weight device including a motor secondary element, a roping device connecting the elevating chamber to the balance weight assembly, wherein the roping device is a roping device for the elevating chamber. Ratio of the balance weight assembly and the roping ratio of the balance weight assembly, wherein the roping ratio of the lift chamber is smaller than the roping ratio of the balance weight assembly. A total travel distance less than a total travel distance of the lift chamber, the at least one wall associated with the balance weight assembly, wherein the wall has a surface profile that is generally open toward the balance weight assembly. Mounted on the wall And a motor primary element was,
However, the motor secondary element is spaced from the motor primary element by a substantially constant air gap, the elevator apparatus comprising: 15. The elevator apparatus according to claim 14, wherein the lifting chamber has a roping ratio of 1: 1 and the balance weight assembly has a roping ratio of 2: 1. 16. The elevator installation according to claim 14, wherein the motor primary element surrounds at least a part of the motor secondary element. 17. The elevator installation according to claim 14, wherein said motor primary element comprises two core parts, one of said core parts being arranged on said wall and the other of said core parts being said. An elevator apparatus in which an intermediate space is formed facing one core portion, and the motor secondary element is arranged in the intermediate space. 18. An elevator apparatus comprising: an elevator chamber, a linear motor having a secondary element, and a hybrid roping device that connects the elevator chamber to a secondary element of the linear motor. 19. The elevator apparatus according to claim 18, wherein the linear motor is a tubular linear motor. 20. The elevator installation according to claim 19, wherein the secondary element is rigid.