JPH06329365A - Self-mobile type elevator - Google Patents

Abstract

PURPOSE:To enhance the safety by furnishing a safety device on each side of a self-mobile type elevator car driven by a linear motor, wherein each safety device consists of a swinging brake shoe, a stopper mechanism to retain the brake shoes at normal times in the condition off contacting with the elevating/ sinking path and put them in contacting condition in the event of failure, and an energizing means to push out the brake shoes. CONSTITUTION:A safety device 20 consisting of a swinging brake shoe 21, stopper mechanism 22, and compression coil spring 23 is furnished on each side of an elevator car 1. The stopper mechanism 22 draws the brake shoes 21 toward the car 1 at normal times and separates from the inner wall 5a of the elevating/sinking path 5 to retain them in the condition off contacting therewith, while releases restraint of the brake shoes 21 in the event of failure. With the release, the brake shoes 21 are put in pressure contact with the inner wall 5a by the energization force of the coil spring 23 to be in the contacting condition, and braking force is applied with frictional force.

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 in which a car is self-propelled by driving a linear motor, and more particularly to a self-propelled elevator designed to ensure safety when a car is dropped or the like is running abnormally.

[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.

An example of this is briefly described with reference to FIG. 4. In FIG. 1, reference numeral 1 denotes a car equipped with a car door device 1a, and a primary coil 2 which is a linear motor member is provided on the left and right side surfaces of the car 1.
Is attached, guide wheels 3 are attached to the upper, lower, front and rear portions, respectively, and a current collector 4 for power supply is provided in the lower portion.

On the other hand, two guide rails 6 as a car traveling guide device with which the left and right guide wheels 3 of the car 1 are rollingly engaged are attached to the left and right side wall surfaces in the hoistway 5. A secondary conductor 7, which is a linear motor member, is attached to a portion between the rails so as to face the primary coil 2 on the car side at a constant interval.

Then, by energizing the left and right primary coils 2 from the hoistway side through a current collector 4 provided on the side of the car 1, attraction / repulsion acting between the primary coil 2 and the secondary conductor 7 is performed. The car 1 obtains thrust by utilizing the force and travels in the hoistway 5 along the guide rails 6.

In this type of self-propelled elevator driven by a linear motor, the guide rail 6 as described above is used.
It is also possible to guide the car 1 by directly rolling four guide wheels 3 with a steering function provided on the left and right side surfaces of the car 1 to the left and right wall surfaces in the hoistway 2 without providing the car. .

In addition, in this type of self-propelled elevator driven by a linear motor, in order to improve the transportation capacity, the structure shown in FIG.
Proposals such as those shown in are also made. As a hoistway 5, a special path 11 for ascending and a special path 12 for descending are arranged in parallel on the left and right, and the traverse path 1 connecting both at the upper and lower ends.
3 and 14 are provided so that a plurality of cars 1 can circulate.

Further, the ascending-only road 11 and the descending-only road 12 are juxtaposed in the depth direction from the foremost part, and the getting-on / off routes 11a and 12a having the hall door device 5a,
The car running routes 11b and 12b and the car overtaking routes 11c and 12c are provided, and a plurality of inclined connecting paths 15 are provided so that the car 1 can move back and forth between these front and rear lines.

Each of the lines 11a, 11b, 11c, 12 of the ascending-only path 11 and the descending-only path 12 of the hoistway.
Secondary conductors 7 serving as the linear motor members are provided along the left and right wall surfaces of a, 12b, 12c and the communication paths 15, respectively. A plurality of cars 1 can selectively run on each of these routes and connecting paths by the steering guidance by the guide wheels 3 and the thrust by the linear motor drive described above.

Since such a self-propelled elevator does not use suspension ropes, there is no limit to the lifting stroke, and it is applicable to ultra-high-rise buildings, etc., and it is possible to run multiple cars in one hoistway. It is possible to improve the transportation power, and there are many advantages such as no need for a machine room just above the hoistway.

By the way, in such a self-propelled elevator driven by a linear motor, since the hoisting rope as seen in the conventional traction type elevator is not used, the primary coil 4 is de-energized due to a power failure or the like. There is an even greater risk of the car 1 free fall or falling at an abnormal speed due to an abnormality, and safety measures are necessary to prevent this.

As a safety measure, as in a conventional general traction type elevator, the electromagnetic brake is activated to stop the hoisting machine or the speed governor by an abnormality detecting operation of a speed governor using a governor rope interlocking with a car. The self-propelled method cannot hold the car by braking the car by grasping the guide rail with an emergency stop device that interlocks with the governor rope.

For this purpose, for example, Japanese Patent Laid-Open No. 3-18256
As disclosed in Japanese Patent No. 5, a safety device has been proposed in which an emergency stop mechanism is provided in multiple stages in a hoistway and the emergency stop mechanism is operated to stop the car when an abnormality such as a power failure occurs.

[0014]

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 it is an object of the present invention that a car can be reliably braked and stopped when an abnormality such as a power failure occurs, and production, installation and maintenance inspection are easy and economical, and elevator operation is possible. An object of the present invention is to provide a self-propelled elevator equipped with a safety device capable of improving service and ensuring reliability.

[0016]

In order to achieve the above object, the present invention provides either one of a primary coil and a secondary conductor of a linear motor on a car side, and a hoistway side on which the car is run. The other member of the primary coil and the secondary conductor of the linear motor is provided in a state of facing 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 a car by the thrust generated, swingable brake shoes are provided on both sides of the car, and these brake shoes are normally pulled toward the car to contact the hoistway side member. The stopper mechanism that holds the brake shoe on both sides at the same time when the power failure occurs, and the stopper mechanism is released. There wherein the providing a safety device that includes a biasing means for braking stop the car by and brought into pressure contact with the shaft side member extruding brake shoe friction respectively.

It is preferable that the safety devices are arranged in a well-balanced manner on the left and right sides of the car, one pair each in the front and rear direction. Further, it is preferable that the brake shoe of the safety device has a vertically long shape, is provided so that the lower end portion is pivotally attached to the side portion of the car so as to be swingable inward and outward, and the upper end portion is held by the stopper mechanism. .

The stopper mechanism of the safety device includes a solenoid which operates when power to the linear motor member is cut off,
It is preferable to use a spring that releases the holding state of the brake shoe by the operation of the solenoid, and the biasing means uses a spring that constantly presses the brake shoe toward the hoistway.

[0019]

According to the self-propelled elevator equipped with such a safety device, the stopper mechanism of the safety device on both sides of the car pulls the brake shoe to the car side and holds it in a state where it does not come into contact with the hoistway side member in normal times. The car is now free to run in the hoistway by the linear motor drive.

If an abnormality such as a power failure occurs,
Each stopper mechanism of the safety device on both sides of the car operates to release the holding state of each brake shoe at the same time. Along with this, the urging means pushes out the brake shoes on both sides to press them strongly against the members such as the walls on both sides of the hoistway, and the car by the pressure friction between the brake shoes on both sides and the members on both sides of the hoistway. It will start braking quickly in a stable state. This avoids the danger of free fall of the car and enables safe elevator operation.

By arranging the above-mentioned safety devices on both sides of the car in a well-balanced manner, a pair of front and rear parts are arranged in a well-balanced manner to ensure the stopping of braking of the car and the stability of the car during the braking (the car rotates in the front-rear direction). Do not lean or lean).

[0022]

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. 4 and 5 described above are designated by the same reference numerals to simplify the description.

FIG. 1 is a vertical cross-sectional view of a part of a self-propelled elevator equipped with a safety device, FIG. 2 is a vertical cross-sectional view of a part of the same in a braking state, and FIG. 3 is a horizontal cross-sectional view of the same in a braking state. The left and right sides of the car 1 are provided with either one of the primary coil and the secondary conductor of the linear motor, that is, the primary coil 2 in this embodiment. Power can be supplied to the primary coil 4 from the hoistway 5 side even during traveling through a current collector (not shown). Guide wheels 3 with a steering function that roll along the surfaces of the left and right inner walls 5b of the hoistway 5 are provided at the front and rear upper and lower portions on both the left and right sides of the car 1.

On the other hand, the other member of the primary coil and the secondary conductor of the linear motor, that is, the secondary conductor 7 in this embodiment, is attached to the left and right inner walls 5b of the hoistway 5. The secondary conductor 7 uses a permanent magnet and is arranged over the entire area of the inner wall 5b of the hoistway 5 in the car traveling direction.

Safety devices 20 are provided on both left and right side surfaces of the car 1 of such a self-propelled elevator. As shown in FIG. 3, four safety devices 20 are arranged in a well-balanced manner at the front and rear portions of the primary coils 4 on both left and right sides of the car 1, as shown in FIG.

All of the left and right safety devices 20 have the same structure. As shown in FIG. 1, the brake shoes 21 are arranged on the sides of the car 1 so as to be swingable, and the brake shoes 21 are used in a normal car. The stopper mechanism 22 that pulls the brake shoe 21 toward the first side and keeps it from coming into contact with the inner wall 5b that is the hoistway side member, and releases the held state of the brake shoe 21 when an abnormality such as a power failure occurs, and the brake that accompanies the release of the stopper mechanism 22. Push out the shoe 21 and the hoistway inner wall 5b
And a compression coil spring 23 as an urging means for pressing it against.

The brake shoes 21 are made of metal and have a vertically long rectangular bar shape, and the upper and lower parts thereof are bent slightly inward. These brake shoes 21
The lower end is pivotally mounted on a bracket 24 projecting from the side of the car 1 via a horizontal shaft pin 25 so that the lower end can swing inward and outward. A compression coil spring 23 as the urging means is interposed between the car 1 and a portion slightly above the middle of the brake shoe 21 so that the brake shoe 21 is constantly pressed to the hoistway side (outward). There is. A high friction member (not shown) may be stretched on the inner wall 5a on both sides of the hoistway 5 facing the brake shoe 21.

The stopper mechanism 22 is provided with a solenoid (electromagnet) 26 attached to a side portion of the car 1 and rotatably supported by the solenoid 26 so as to draw the upper end portion of the brake shoe 21 to the car 1 side. It is composed of a lever (stopper) 27 that holds the pressed state. That is, in the stopper mechanism 22, the solenoid 26 is normally excited, and the lever 27 pulls the brake shoe 21 toward the car 1 to hold it in a state where it does not contact the inner wall 5b that is the hoistway side member. When the power supply to the member is cut off, the solenoid 26 is demagnetized to release the support of the lever 27, and thereby the holding state of the brake shoe 21 is released.

In a self-propelled elevator equipped with such a safety device 20, during normal times (normal times), as shown in FIG.
Four left and right guide wheels 3 of the car 1 roll on the left and right inner walls 5b of the hoistway 5, so that the car 1 is guided and supported so as to be able to travel while maintaining a horizontal posture. The solenoid 26 of the stopper mechanism 22 of the safety device 20 to be arranged is energized and excited, and the lever 27 pulls the brake shoe 21 to the side of the cage 1 against the spring 23 so as not to come into contact with the inner wall 5b which is a hoistway side member. Hold on.

In this state, the primary coils 2 on both the left and right sides of the car 1 are constantly energized, and by controlling the amount of current / voltage applied to the primary coil 2, the primary coil 2 and the hoistway side are connected. The thrust acting between the car 1 and the secondary conductor 7 is controlled, and the car 1 performs ascending traveling, stationary landing, descending traveling, etc. along the hoistway 5.

Here, if the power supply to the primary coil 2 is interrupted in the event of an abnormal event such as an unexpected power failure, the thrust between the primary coil 2 and the secondary conductor 7 is lost, and the car 1 Although free fall begins, at this time, the solenoids 26 of the stopper mechanisms 22 of the front and rear safety devices 20 on both the left and right sides of the car 1 are also deenergized, and these solenoids 26 are demagnetized to allow the rotation of the lever 27. So each brake shoe 2
The holding state of 1 is released at the same time.

Along with this, the compression coil spring 23 as the urging means pushes out the brake shoes 21 on both sides to the outside, and the intermediate portion of each of the brake shoes 23 is moved up and down the hoistway 5 as shown in FIGS. The inner walls 5a on both sides are strongly pressed against each other. As a result, the car 1 is quickly braked and stopped by the pressure contact frictional force between each brake shoe 21 and the hoistway inner wall 5a, and the risk of free fall of the car 1 is avoided.
At the time of this braking, the brake shoes 21 of each safety device 20 arranged on the left and right sides of the car 1 are simultaneously pressed against the inner walls 5a on both sides of the hoistway 5, so that stable braking is obtained and the car 1 is moved in the front-rear direction. It maintains a correct posture without turning or tilting.

As described above, in the event of an abnormality such that the power supply to the primary coil 2 is cut off due to a power failure or the like, the solenoid 2
It was explained that the power supply to 6 was cut off and the braking operation was performed.
Even if the speed of the car 1 exceeds the specified value due to some other abnormality, a speed governor (not shown)
The abnormal speed of the car 1 is detected by the
A configuration may be adopted in which the power supply to 6 is cut off.

As described above, the safety device 20 can surely perform the braking / stopping operation of the car 1 in the event of an abnormality, and the safety device 20 is provided only on the left and right side surfaces of the car 1 to prevent the car 1 from being used in the conventional hoistway. The number of installations can be significantly reduced compared to the technology that is installed in multiple stages, and it does not require time for maintenance and inspection.
It is possible to improve operation services and to realize a reliable, inexpensive and safe self-propelled elevator.

Further, in the above embodiment, the primary coil 2 is arranged on the side of the car 1 as one member of the linear motor, and the secondary conductor 7 is arranged on the wall surface in the hoistway 5 as the other member of the linear motor. However, conversely, the secondary conductor 7 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 arranged on the wall surface in the hoistway 2 as described above. The same applies to a self-propelled elevator having a configuration in which the primary coil 2 is arranged.

[0036]

Since the self-propelled elevator according to the present invention is constructed as described above, when an abnormality such as a power failure occurs, the safety devices provided on both sides of the car simultaneously operate, and the hoistway side of each brake shoe. Compared to one that installs a safety device over multiple steps on the hoistway side, it is easy and economical to manufacture, install and maintain, as it can be reliably prevented from dropping the car by braking with pressure contact frictional force to the member. Safety devices on both sides of the car increase the certainty of stopping the car braking and the stability of the car during braking, thereby improving the elevator operation service and ensuring reliability.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view showing an embodiment of a self-propelled elevator with a safety device according to the present invention.

FIG. 2 is a vertical sectional view of the above embodiment in a braking state.

FIG. 3 is a horizontal sectional view in the same braking state.

FIG. 4 is a schematic configuration diagram in which a self-propelled elevator showing a conventional example is partially omitted.

FIG. 5 is a schematic configuration diagram showing a hoistway of a conventional self-propelled elevator of the same as above.

[Explanation of symbols]

1 ... Basket, 2 ... Primary coil (linear motor member), 5 ...
Hoistway, 5a ... Hoistway side member (inner wall), 7 ... Secondary conductor (linear motor member), 20 ... Safety device, 21 ... Brake shoe, 22 ... Stopper mechanism, 23 ... Spring (biasing means), 24 ... Bracket , 25 ... Horizontal axis pin, 26 ... Solenoid, 27 ... Lever.

Claims (4)

[Claims] 1. A linear motor primary coil and a secondary conductor are provided on one side of a car, and the other side of the primary coil and the secondary conductor of the linear motor is provided on the hoistway side on which the car is run. Self-propelled by a linear motor drive system in which the car is driven by a thrust generated between the car-side linear motor member and the hoistway-side linear motor member. In an elevator, swingable brake shoes are provided on both sides of the car, and these brake shoes are pulled to the car side during normal times to keep them from contacting the hoistway side members and brakes on both sides when an abnormality such as a power failure occurs. A stopper mechanism that releases the holding state of the shoe at the same time, and the brake shoe is pushed out and pressed against the hoistway side member when the stopper mechanism is released. A self-propelled elevator, characterized in that it is provided with respective safety devices having at least a biasing means for braking and stopping the car by frictional force. 2. The self-propelled elevator according to claim 1, wherein the safety device is arranged on both left and right sides of the car in a well-balanced manner in front and rear pairs. 3. The brake shoe of the safety device has a vertically long shape, and has a lower end portion pivotably attached to a side portion of a car so as to be swingable inward and outward, and an upper end portion thereof is held by a stopper mechanism. The self-propelled elevator according to claim 1 or 2, characterized in that: 4. The stopper mechanism of the safety device comprises a solenoid that operates when the power supply to the linear motor member is cut off, and a lever that releases the holding state of the brake shoe by the operation of this solenoid. The self-propelled elevator according to any one of claims 1 to 3, wherein the spring is a spring that constantly presses the brake shoe toward the hoistway.