JPH0761736A - Linear motor elevator - Google Patents

Abstract

PURPOSE:To prevent occurrence of a risk caused by rolling of a secondary conductor in a columnar linear motor which is vertically extended by a long length in an elevator shaft, by providing support devices for restraining rolling of the secondary conductor while allowing longitudinal expansion and contraction of the secondary conductor, to the lower end part of the secondary conductor. CONSTITUTION:In a linear motor elevator in which an elevator car 5 and a balance weight 6 are elevatable along a guide rail in a bucket well type manner, a cylindrical primary conductor 7 of a linear motor is attached to the balance weight 6, and a columnar secondary conductor 8 which is vertically extended by a long length in an elevator shaft 1 is provided piercing through the cylindrical primary conductor 7. In this case, support devices 15 are attached on a base 12 at the lower end of the secondary conductor 8 at four positions angularly spaced from one another at intervals of 90deg. These support devices 15 is composed of a support lever 18 for supporting a roller 17 journalled to a support bed 16 secured on the base 12 and making contact with the secondary conductor 8, and a resilient member 19 for resiliently supporting the support lever 18 in the direction of the secondary conductor 8, thereby it is possible to restrain rolling of the secondary conductor 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor elevator using a linear motor as a drive source.

[0002]

2. Description of the Related Art Conventionally, in an area where the height of a building is restricted due to the problem of sunshine, etc., when installing an elevator, it may not be possible to install a machine room right above the hoistway, that is, a penthouse on the roof of the building. is there. For this reason, hydraulic elevators that can freely install a machine room in the lower part of the hoistway have been widely used, but in recent years, a penthouse is not required, power consumption is lower than that of a hydraulic elevator, and noise is low, and the elevator process Therefore, the adoption of a linear motor elevator that can achieve a large rated speed is being considered.

This linear motor elevator is shown in FIG. 4 (a).
Briefly explaining with (b), a pair of sheaves 3, 3 are rotatably attached to the upper part of the elevator hoistway 1 of the building via a beam 2, and a suspending rope 4 is wound around them to elevate both ends thereof. A car 5 for hanging a person or luggage on one end of the suspension rope 4 and a counterweight 6 is fastened to the other end of the suspension rope 4, and both of them are connected to a guide rail (not shown) through the suspension rope 4. It is hung vertically so that it can be raised and lowered.

Further, a primary conductor (coil) 7 of a cylindrical linear motor is attached to the counterweight 6 as a source for raising and lowering the same, and penetrates into the primary conductor 7 of the cylindrical linear motor. Hoistway 1
Secondary conductor 8 of a cylindrical linear motor extending vertically inside
Is provided.

The secondary conductor 8 of this cylindrical linear motor
Is a long cylinder made of iron, aluminum, or a composite material made of iron and having a length of about 1 to 5 meters. By fixing the beam 9 and the mounting plate 10 provided on the upper part of the hoistway 1 by welding or the like, the hoistway 1
It is installed so as to hang down inside, and a bracket 11 is welded and fixed to the lower end of the bracket 11, and the bracket 11 is slidably fitted to a plurality of screw rods 13 standing upright in the lower part of the hoistway 1 via a base 12 and a spring. By pressing from above by 14, it is fixed vertically with tension applied so as not to cause buckling as a whole.

In the linear motor elevator having such a configuration, the car 5 and the counterweight 6 are relatively moved via the suspension rope 4 by the thrust generated between the primary conductor 7 and the secondary conductor 8 by the energization of the primary conductor 7. It will come up and down. In addition, the primary conductor 7 and the secondary conductor 8 of the linear motor as the above-mentioned lifting drive source are not on the side of the counterweight 6 but on the car 5
It may be provided on the side.

[0007]

However, in the conventional linear motor elevator, the secondary conductor 8 is only fixed to the mounting plate 10 of the beam 9 provided on the upper part of the hoistway 1, and the lower end is Since it is not fixed, for example, the secondary conductor 8 may roll laterally during an earthquake. When the roll occurs, the gap between the secondary conductor 8 and the primary conductor 7 changes, the thrust becomes unstable, and safe operation cannot be performed. In addition, the upper end fixing portion of the secondary conductor 8 cannot be operated. There is a risk that excessive bending stress will occur in the and the fixing part will be damaged. Therefore, an object of the present invention is to provide a linear motor elevator which is excellent in safety by preventing the risk of rolling of the secondary conductor 8 due to rolling.

[0008]

In order to achieve the above object, the present invention firstly requires that a basket and a counterweight are suspended in a hoistway through a sheave and a suspension rope wound around the sheave. In addition to being hung in a manner such that the primary conductor of a cylindrical linear motor is provided on either one of the cage and the counterweight, and the upper end is fixed in the hoistway while penetrating into the primary conductor. A long and vertically long columnar secondary motor secondary conductor is provided, and the cage and the counterweight are relatively moved up and down via a suspension rope by the thrust generated between the primary conductor and the secondary conductor by energizing the secondary conductor. In the linear motor elevator, a linear motor is provided at a lower end portion of the secondary conductor, the supporting device being provided for suppressing the rolling of the secondary conductor and permitting the secondary conductor to expand and contract in the longitudinal direction. Provide other elevator. Secondly, in the hoistway, a sheave and a hanging rope wound around the sheave are used to suspend a basket and a counterweight in a hanging manner, and one of the cage and the counterweight has a cylindrical linear shape. A primary conductor of the motor is provided, and a columnar linear motor secondary conductor whose upper end is fixed in the hoistway and extends vertically in a state of penetrating into the primary conductor is provided.
In a linear motor elevator in which the cage and the counterweight are moved up and down relatively by a thrust generated between the primary conductor and the secondary conductor by means of energization, a roll of the secondary conductor is detected. The present invention provides a linear motor elevator characterized in that the roll detecting means is provided, and the elevator is stopped when roll is detected.

[0009]

With the above-described structure, firstly, in the hoistway, the primary conductor of the cylindrical linear motor provided on either one of the car and the counterweight and the primary conductor are penetrated into the hoistway. A linear motor is constructed by a secondary conductor of a linear motor which is fixed at the upper end and extends vertically for a long time, and a basket and a counterweight are moved up and down relatively via a hanging rope, and at the lower end of the secondary conductor. The supporting device provided suppresses the rolling of the secondary conductor and allows the secondary conductor to expand and contract in the longitudinal direction. Secondly, an upper end is fixed in the hoistway and extends vertically in a state of penetrating the primary conductor and the primary conductor of a cylindrical linear motor provided on either one of the car and the counterweight. A linear motor is configured by a secondary conductor of a linear motor provided in a column shape, and a basket and a counterweight are relatively moved up and down via a suspension rope, and a roll detection means
The rolling of the next conductor is detected, and the elevator is stopped when the rolling is detected.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the linear motor elevator of this embodiment shown in FIG. 1, a pair of sheaves 3 are rotatably supported by a beam 2 spanning the upper part of a hoistway 1, and a hanging rope 4 is wound around these sheaves 3. A car 5 and a counterweight 6 are fastened to both ends of the lever, and the car 5 and the counterweight 6 can be lifted and lowered in a sliding manner along a guide rail (not shown).

As a lifting drive source for this linear motor elevator, the primary conductor (coil) of a cylindrical linear motor is used.
7 is provided on the counterweight 6, and the hoistway 1 is provided in a state of penetrating inside the cylindrical primary conductor 7.
A cylindrical linear motor secondary conductor 8 extending in the vertical direction is provided therein.

The secondary conductor 8 of this cylindrical linear motor
Is a long cylinder made of iron, aluminum, or a composite material made of iron and having a length of about 1 to 5 meters. By fixing the beam 9 and the mounting plate 10 provided on the upper part of the hoistway 1 by welding or the like, the hoistway 1
It is installed so as to hang down inside, and a bracket 11 is welded and fixed to the lower end of the bracket 11, and the bracket 11 is slidably fitted to a plurality of screw rods 13 standing upright in the lower part of the hoistway 1 via a base 12 and a spring. By pressing from above by 14, it is fixed vertically with tension applied so as not to cause buckling as a whole.

Supporting devices 15 are installed at four places at 90 ° intervals on the base 12 below the secondary conductor 8, and the supporting device 15 suppresses the rolling of the secondary conductor 8 and The secondary conductor is provided so as to allow expansion and contraction in the vertical direction.

As shown in FIGS. 2 (a) and 2 (b), the supporting device 15 includes a supporting base 16 fixed on the base 12, and a roller which is axially supported by the supporting base 16 and abuts on the secondary conductor. The support lever 18 supports the support lever 17, and the elastic body (spring) 19 elastically supports the support lever 18 in the direction of the secondary conductor 8.
In addition, the support device 15 is provided with a roll detector (limit switch) 20 for detecting the displacement of the support lever 18, that is, the roll of the secondary conductor 8, and when the secondary conductor 8 rolls. Limit switch 20 is turned off to stop the elevator.

In the linear motor elevator constructed as described above, when a lateral load is applied to the secondary conductor 8 due to an earthquake or the like to cause a rolling motion, the supporting device 15 suppresses the lateral motion. When the rolling becomes large, the limit switch 20 is activated to stop the elevator.

Therefore, according to this embodiment, the lateral movement of the secondary conductor 8 is suppressed by the supporting device 15, and the longitudinal expansion and contraction of the secondary conductor 8 is allowed in the supporting device 15. The change in the gap between the secondary conductor 8 and the primary conductor 7 is made small so that a stable thrust can always be obtained, and excessive bending stress is prevented from being generated in the fixed portion of the secondary conductor 8.
It is possible to prevent the buckling due to the thermal expansion and to provide a linear motor excellent in safety.

Next, another embodiment of the present invention will be described with reference to FIG. In FIG. 3, a configuration different from that of FIG. 2 is that the support device 15 in FIG.
The point is that a cylindrical metal fitting 21 that covers the next conductor 8 is provided.

As described above, by installing the cylindrical metal fitting 21, it is possible to suppress the lateral vibration of the secondary conductor 8 and to allow the expansion and contraction in the vertical direction, so that the same effect as the above-mentioned embodiment can be obtained. be able to. Also, the cylindrical metal fittings 21 and 2
Draw lead wires 22 on the next conductors 8 respectively,
When the next conductor 8 comes into contact, it can be short-circuited and the operation can stop the elevator.

[0019]

As described above, according to the present invention, the counterweight is provided with the primary conductor and the vertical weight of the hoistway is 2
In a linear motor elevator that is provided with a secondary conductor to configure a linear motor and is driven up and down, the secondary conductor is prevented from rolling and buckling does not occur in the secondary conductor.
It is possible to provide a linear motor elevator with excellent safety.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a linear motor elevator of the present invention.

FIG. 2 is a side view of a supporting device for a linear motor elevator according to the present invention.

FIG. 3 is an overall configuration diagram of another embodiment of the linear motor elevator of the present invention.

FIG. 4 is an overall configuration diagram of a conventional linear motor elevator.

[Explanation of symbols]

1 ... hoistway, 3 ... sheave, 4 ... suspension rope, 5 ... basket,
6 ... counterweight, 7 ... primary conductor, 8 ... secondary conductor, 15
… Supporting device, 20… Limit switch, 21… Cylindrical metal fittings.

Claims (6)

[Claims] 1. A sheave and a suspending rope wound around the sheave are suspended in a hoistway to suspend a car and a counterweight in a hanging manner, and one of the car and the counterweight has a cylindrical linear shape. A primary conductor of the motor is provided, and a columnar linear motor secondary conductor whose upper end is fixed in the hoistway and extends vertically in a state of penetrating into the primary conductor is energized to the primary conductor. Thus, in a linear motor elevator in which the cage and the counterweight are relatively moved up and down by a thrust generated between the secondary conductor and a secondary conductor, the secondary conductor rolls at the lower end portion of the secondary conductor. A linear motor elevator, which is provided with a support device that suppresses the above-mentioned phenomenon and allows the secondary conductor to expand and contract in the vertical direction. 2. A cage and a counterweight are hung in a hoistway in a hoistway through a sheave and a suspension rope wound around the sheave, and a cylindrical linear member is provided on one of the cage and the counterweight. A primary conductor of the motor is provided, and a columnar linear motor secondary conductor whose upper end is fixed in the hoistway and extends vertically in a state of penetrating into the primary conductor is energized to the primary conductor. As a result, in a linear motor elevator in which the cage and the counterweight are relatively moved up and down by a thrust generated between the secondary conductor and a suspension rope, a roll detection unit for detecting the roll of the secondary conductor is provided. A linear motor elevator characterized in that the elevator is stopped when a roll is detected. 3. The supporting device comprises a roller that abuts against the secondary conductor, a supporting lever that supports the roller, and an elastic body that presses the supporting lever toward the secondary conductor. The linear motor elevator according to claim 1. 4. The linear motor elevator according to claim 1, wherein the supporting device is a cylindrical member provided so as to cover the secondary conductor. 5. A limit switch for detecting lateral roll of the secondary conductor by swinging of the support lever is provided, and the elevator is stopped by the operation of the limit switch. Linear motor elevator. 6. The cylindrical member is made of a metal member, and lead wires are respectively drawn to the cylindrical member and the secondary conductor, and the cylindrical member and the secondary member are rolled when the secondary conductor rolls. 5. The linear system according to claim 4, further comprising: roll detecting means that is short-circuited when the conductors come into contact with each other, and stops the elevator when the roll is detected by the roll detecting means. Motor elevator.