JPH06115855A - Self-running elevator - Google Patents

Abstract

PURPOSE:To provide a self-running elevator having a safety device which is designed that manufacture, installation, and maintenance and inspection are facilitated and economical to make, elevator operation service is improved, and reliability is ensured. CONSTITUTION:A linear motor-driven type self-running elevator is formed such that the primary coil 4 of a linear motor is mounted on the car 1 side, the secondary conductor 5 of the linear motor is arranged on the elevation passage 2 side in a state to be positioned facing the primary coil, and the car 1 is run by means of thrust generated between the primary coil 4 and the secondary conductor 5. A safety device 10 is provided with an electromagnet 11 to hold a distance between the secondary conductor 5 on the elevation passage 2 side and the primary coil at a constant value by pulling the primary coil 4 to the car 1 side during normal operation and release a holding force when abnormality occurs; and a spring 12 to push out the primary coil on the car 1 side occasioned by release of the holding force of the electromagnet 11 when abnormality occurs and cause attraction and joining of the primary coil with the secondary conductor 5 on the elevation passage 2 side to brake and stop the car 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled elevator using a linear motor as a drive source, and more particularly to a self-propelled elevator equipped with a safety device for preventing a car from falling when an abnormality such as a power failure occurs.

[0002]

2. Description of the Related Art In recent years, various types of self-propelled elevators have been proposed in which a car is driven in a hoistway by a linear motor drive, instead of a traction type elevator that lifts and lowers a car by hoisting a conventional suspension rope. It has been done.

Since this self-propelled elevator does not use a suspending rope, there is no limit to the up-and-down stroke, and it can be applied to a skyscraper and the like, and a plurality of cars can be run in one hoistway. It has the advantages that the transportation capacity can be improved and that no machine room is required just above the hoistway.

FIGS. 5 to 7 are schematic views of a linear motor driven self-propelled elevator system previously proposed by the applicant of the present invention. In FIG. 5, reference numeral 1 denotes a plurality of cars equipped with a car door device 1a. Indicates a hoistway equipped with a hall entrance / exit door device 2a on each floor.

A hoistway 2 is provided at the front, rear, upper and lower parts of the left and right sides of each car 1.
Guide wheel 3 with a steering function that rolls along the left and right walls of the car
(See FIGS. 6 and 7) respectively, and the primary coils 4 of the linear motor are attached to the left and right side surfaces of the car 1, and the permanent coils of the linear motor are installed on the left and right wall portions in the hoistway 2 so as to face them. A secondary conductor 5 made of a magnet or the like is attached.

By guiding each of the four guide wheels 3 on the left and right to the left and right wall surfaces in the hoistway 2 to guide the car 1,
The primary coils 4 of the left and right linear motors of the car 1 face the secondary conductors 5 of the linear motors on the left and right wall surfaces of the hoistway 2 with a constant space A (about 2 to 3 mm), and in this state Left and right primary coils 4 via a current collector 6 provided on one side
When the car 1 is energized, the car 1 obtains thrust by utilizing the attraction / repulsion force acting between the primary coil 4 and the secondary conductor 5, and the car 1 receives the thrust in the hoistway 2 along the secondary conductor 5. To run.

Further, the hoistway 2 has a dedicated ascending path 21 for traveling a plurality of cars 1 at the same time to improve the transportation capacity.
And the descending-only path 22 are arranged in parallel on the left and right, and traverse paths 23 and 24 connecting the both at the upper and lower ends are provided so that the car 1 can circulate. Further, the ascending-only path 21 and the descending-only path 22 are arranged in parallel in the depth direction from the forefront, respectively, to get on / off routes 21a and 22a, car running routes 21b and 22b, and car passing line 2
1c and 22c are provided, and a plurality of inclined connecting paths 25 are provided so that the car 1 can move back and forth between these front and rear lines while going up and down. Each of the routes 21a, 21 of the ascending-only path 21 and the descending-only path 22 of the hoistway 2
b, 21c, 22a, 22b, 22c and each connecting path 2
The secondary conductors 5 of the linear motor are attached to the left and right wall surfaces of 2. The car 1 selectively travels on each of these routes and connecting paths by the steering guide by the guide wheels 3 and the thrust by the linear motor drive described above.

By the way, in such a linear motor driven self-propelled elevator, it is necessary to take safety measures to prevent the car 1 from dropping when the primary coil 4 is de-energized due to a power failure or the like. As a safety measure, although not shown, as seen in Japanese Patent Laid-Open No. 3-182565,
It has been proposed to provide an emergency stop device in multiple stages in the hoistway and operate the emergency stop device to stop the car when an abnormality such as a power failure occurs.

[0009]

However, in the self-propelled elevator equipped with the emergency stop device described above, when the hoisting stroke is high such as in a skyscraper, the emergency stop devices are arranged in multiple stages in the hoistway. It is uneconomical because the number of installations is too large, the manufacturing costs and installation costs of the equipment are high, and the maintenance and inspection of all equipment requires a lot of time and labor. There are problems such as deterioration of operating services and difficulty in securing reliability.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a safety device that is easy and economical to manufacture, install, maintain and inspect, and that can improve elevator operation service and ensure reliability. To provide self-propelled elevators.

[0011]

In order to achieve the above-mentioned object, the present invention provides either one of a primary coil of a linear motor and a secondary conductor on a car side, and a hoistway side on which the car travels. The primary coil of the linear motor and the other of the secondary conductors are provided so as to face the linear motor member on the car side, and between the linear motor member on the car side and the linear motor member on the hoistway side. In a linear motor drive type self-propelled elevator that drives the car by the thrust generated in

During normal times, the car-side linear motor member is pulled toward the car side to maintain a constant distance from the hoistway-side linear motor member, and at the same time, a holding means for releasing the holding force thereof, and a holding means in case of an abnormality. When the holding force of the means is released, a safety device is provided, which comprises an urging means for pushing out the car-side linear motor member and adsorbingly joining it to the hoistway-side linear motor member to brake and stop the car. To do.

[0013]

According to the self-propelled elevator having the above-described structure, the retaining means of the safety device pulls the car-side linear motor member toward the car side and maintains a constant distance from the other linear motor member on the hoistway side in normal times. The thrust generated between the two linear motor members causes the car to travel in the hoistway. When an abnormality such as an unexpected power failure occurs, the holding force of the holding means is released, and along with this, the biasing means pushes out the car-side linear motor member to adsorb and join it to the hoistway-side linear motor member, and the mutual adsorption. Friction resistance will stop the car from braking.

Such a safety device need only be provided in the car, the number of installations is small, manufacturing and installation of the device and maintenance and inspection are easy and economical, and the elevator operation service can be improved and reliability can be ensured. Like

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, the same components as those shown in FIGS. 5 to 7 are designated by the same reference numerals to simplify the description.

FIG. 1 is a horizontal sectional view of a self-propelled elevator with a safety device, FIG. 2 is a side view taken along line XX of FIG. 1, FIG. 3 is a rear view taken along line YY of FIG. FIG. 6 is a horizontal sectional view of an emergency stop operation state.

Guide wheels 3 with a steering function, which roll along the left and right wall surfaces of the hoistway 2, are provided on the left and right side surfaces of the car 1, respectively, and on the left and right sides thereof. Either one of the coil and the secondary conductor, that is, the primary coil 4 in this embodiment is installed. Power can be supplied from the inner wall of the hoistway 2 even during traveling through the current collector 6 projecting from the side surface of the car 1 to the primary coil 4.

The other member of the primary coil and the secondary conductor of the linear motor, that is, the secondary conductor 5 in this embodiment is attached to the left and right wall surfaces in the hoistway 2. This 2
The next conductor 5 uses a permanent magnet and is arranged in the hoistway 2 over the entire traveling direction of the car.

Safety devices 10 are provided on the left and right side surfaces of the car 1 of the self-propelled elevator. The safety device 10 includes an electromagnet 11 as a holding unit that pulls and holds the primary coil 4 that is non-fixedly arranged on the left and right side surfaces of the car 1 toward the car 1 side, and releases the holding force of the electromagnet 11 when an abnormality occurs. And a spring 12 as an urging means for pushing out the primary coil 4 and adsorbing and joining it to the linear motor member on the hoistway side.

That is, the electromagnets 11 have a vertically long plate shape, and are fixed to the left and right side surfaces of the car 1 in a front and rear manner in parallel with each other. By exciting these electromagnets 11 by energizing, the primary coil 4 is strongly attracted and attracted to the car 1 side and held, and the distance A between the secondary conductor 5 on the hoistway 2 side is kept constant. . When the electromagnet 11 is de-energized due to the interruption of electricity when an abnormality such as a power failure occurs, the suction holding force of the primary coil 4 is released.

The spring 12 is a compression coil spring, and the car 1
Are disposed in the four corners near each of the left and right side surfaces of the primary coil 4 and the primary coils 4 in total, and a total of four intervening ones are disposed.
Is pushed outward and is adsorbed and joined to the secondary conductor 5 on the hoistway 2 side.

The electromagnet 11 of the safety device 10 is excited in normal times and is larger than the sum (combined force) of the attraction force generated between the primary coil 4 and the secondary conductor 5 and the pushing force of the spring 12. It is set so that it exerts an attractive force, is demagnetized when an abnormality such as a power failure occurs, and the attractive force becomes smaller than the combined force.

The springs 12 are prevented from falling off by stopper bolts 13 provided on the left and right side surfaces of the car 1, respectively. Further, stopper blocks 14 are attached to the left and right side surfaces of the car 1 near the upper ends as shown in FIGS. 2 and 3 so that the upper part of the primary coil 4 contacts from below.

In a self-propelled elevator equipped with such a safety device 10, the four guide wheels 3 on the left and right of the car 1 roll on the left and right wall surfaces in the hoistway 2 in normal time (normal time), so that the car 1 Is guided and supported so as to be able to travel while maintaining a horizontal posture, and the electromagnet 11 which is a holding means of the safety device 10 is energized by being energized, so that 1
The secondary coil 4 is strongly attracted so as to be attracted to the car 1 side against the spring 12 and is spaced apart from the secondary conductor 5 on the hoistway 2 side by the distance A.
Hold constant.

In this state, the primary coils 4 on the left and right side surfaces of the car 1 are constantly energized, and the primary coil 4 is controlled by controlling the large amount of current and voltage supplied to the primary coil 4. Thrust acting between the secondary conductor 5 is controlled,
The car 1 moves up and down along the secondary conductor 5 in the hoistway 2.
Performs landing still and descending.

When this thrust is generated, a suction force is generated between the primary coil 4 and the secondary conductor 5, and this suction force depends on the size of the distance A between the primary coil 4 and the secondary conductor 5. But
The distance A is usually about 2 to 3 mm, and the suction force between the two at this time is about 3 times the thrust of the car, so this thrust is 3
In order that the electromagnet 11 exerts a larger attraction force than the sum of the double attraction force and the pushing force of the spring 12, the electromagnet 1
It controls the current and voltage that makes 1 energize.

Next, if the power supply to the primary coil 4 is cut off in the event of an abnormal event such as an unexpected power failure, the thrust between the primary coil 4 and the secondary conductor 5 is lost, and the car 1 starts to fall freely, but at this time, the electromagnet 11 of the safety device 10
Is also cut off, the electromagnet 11 is demagnetized and the holding force of the primary coil 4 is released (the attraction force is weakened). Along with this, the primary coil 4 is pushed out by the urging of the spring 12, and the primary coil 4 is moved to the permanent magnet 2 side of the hoistway 2 side as shown in FIG.
The car 1 is adsorbed and adhered to the next conductor 5 in a close contact state, and the car 1 is braked and stopped by the mutual frictional friction resistance force, so that the car 1 is prevented from free fall and safety can be ensured.

That is, even if the primary coil 4 is not energized,
If the primary coil 4 and the secondary conductor 5 are in close contact with each other, the attraction force F between them becomes several times to several ten times the thrust. Here, a braking force required for stopping the free-falling car 1 at a deceleration of about 0.5 G (G is a gravitational acceleration), that is, the primary coil 4 and the secondary conductor 5 are adsorbed in a close contact state. The generated frictional resistance force P is a friction coefficient between the primary coil 4 and the secondary conductor 5 of about μ = 0.25 (friction coefficient between steels in a dry state), own weight of the car 1 + load capacity = thrust Assuming (static thrust), P = (self weight of car 1 + load capacity) × (1 + 0.5) ÷ (2 × μ) = thrust × 1.5 ÷ (2 × 0.25) = thrust × 3 That is, the frictional resistance P is about three times the thrust, and F> P, and the car 1 can be reliably braked and stopped.

The frictional resistance force P generated by the attraction between the primary coil 4 and the secondary conductor 5 is received by the car 1 when the upper portion of the primary coil 4 contacts the stopper block 14, and the car 1 receives the frictional resistance force P. 1 will stop.

Incidentally, as described above, in the case where the power supply to the primary coil 4 is cut off due to a power failure or the like, and the abnormality occurs, the power supply to the electromagnet 11 is also cut off and the electromagnet 11 is demagnetized. Even if the speed of the car 1 exceeds the specified value due to some abnormality, the speed of the car 1 is detected by a speed governor (not shown),
The current and voltage applied to the electromagnet 11 are controlled to control the electromagnet 11
The primary coil 4 may be pushed out by the spring 12 so as to be attracted to the secondary conductor 5 by reducing the attracting force of.

After the operation of the safety device 10 due to the occurrence of an abnormality, the thrust between the primary coil 4 and the secondary conductor 5 must be equal to or greater than the static thrust in order to return the car 1 to the normal operating state. While energizing the primary coil 4,
The electromagnet 11 is energized to pull the primary coil 4 toward the car 1 so that the electromagnet 11 generates an attractive force equal to or more than the sum of the attractive force between the secondary conductor 4 and the pushing force of the spring 12, and the primary coil 4 is attracted and held. Excuse me.

As described above, the safety device 10 can surely perform the braking / stopping operation of the car 1 in the event of an abnormality, and the safety devices 10 may be installed on the left and right side surfaces of the car 1 one by one. The number of installations can be drastically reduced, maintenance and inspection will not take time, operation services can be improved, and highly reliable, inexpensive and safe self-propelled elevators can be realized.

In the above embodiment, the primary coil 4 is arranged on the side of the car 1 as one member of the linear motor, and the secondary conductor 5 is arranged on the wall surface inside the hoistway 2 as the other member of the linear motor. Although the case of the self-propelled elevator having the configuration is described, conversely, the secondary conductor 5 is arranged as one member of the linear motor on the side of the car 1 and the other member of the linear motor is provided on the wall surface in the hoistway 2. Also in the case of a self-propelled elevator having a configuration in which the primary coil 4 is arranged, similar operational effects can be obtained.

[0034]

Since the self-propelled elevator of the present invention is configured as described above, the safety device can surely prevent the car from dropping when an abnormality occurs, and the number of safety devices installed can be reduced. Manufacturing, installation, maintenance and inspection are easy and economical, and elevator service can be improved and reliability can be secured.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view of a self-propelled elevator with a safety device according to the present invention.

FIG. 2 is a side view taken along line XX of FIG.

FIG. 3 is a rear view taken along the line YY of FIG.

FIG. 4 is a horizontal sectional view of an emergency stop operation state.

FIG. 5 is a schematic configuration diagram of a self-propelled elevator showing a conventional example with a part thereof omitted.

FIG. 6 is a partially enlarged schematic configuration diagram of the above conventional example.

FIG. 7 is a horizontal sectional view of a conventional example of the above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Car, 2 ... Hoistway, 4 ... Primary coil (linear motor member), 5 ... Secondary conductor (linear motor member), 10 ... Safety device, 11 ... Electromagnet (holding means), 12 ... Spring (biasing) means).

Claims (2)

[Claims] 1. A primary coil of a linear motor and 2 on the car side.
One member of the secondary conductor is provided, and the other member of the primary coil of the linear motor and the secondary conductor is provided on the hoistway side on which the car travels so as to face the linear motor member of the car. In a linear motor drive type self-propelled elevator in which a car is driven by a thrust generated between the linear motor member on the car side and the linear motor member on the hoistway side, in a normal time, the linear motor member on the car side is used to drive the car. Holding means for pulling to the side and maintaining a constant distance from the hoistway side linear motor member and releasing the holding force in the event of an abnormality; and the linear motor member on the car side due to the release of the holding force of the holding means in the event of an abnormality A safety device including a biasing means for pushing out and adsorbingly joining the linear motor member on the hoistway side to brake and stop the car. Hashishiki elevator. 2. The safety device uses an electromagnet as the holding means and a spring as the biasing means, and the electromagnet is generated between the linear motor member on the car side and the linear motor member on the hoistway side in normal times. The self-propelling device according to claim 1, wherein a suction force larger than a synthetic force of the suction force and the pushing force of the spring is exerted, and the suction force is controlled to be smaller than the synthetic force when an abnormality such as a power failure occurs. Traveling elevator.