JPH11124281A - elevator - Google Patents

Abstract

(57) [Summary] [Problem] To provide an elevator that can be accurately and smoothly positioned regardless of the number of users in a car. A brake (9) is provided for the upper, lower, left and right sides of a car (1).
When the car 1 comes to the stop position, the brake 9 is actuated, so that the main rope 2 is extended by the packed car.
Prevents vertical swinging. The brake 9 is a guide rail
It is composed of a lever having one side opposed to both side surfaces of 11 and an electromagnet or the like interposed between a fixed portion for supporting an intermediate portion of the lever in the car 1 and the other side of the lever.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an elevator.

[0002]

2. Description of the Related Art In a conventional rope traction type elevator, a machine room is provided at an upper end of a hoistway such as a building.
A hoist and a counterweight are hung on a main rope wound around a hoist of a hoist installed in the machine room, and the hoist is driven to alternately raise and lower the hoist and the counterweight.

For this purpose, a speed reducer is connected to an output shaft of a motor for driving the hoist, and a pulling wheel is press-fitted into an end of the output shaft of the speed reducing device. And a car is suspended on one side of the main rope and the weight is suspended on the other side.

A control panel is installed in the machine room, and the motor is driven by a motor control section of the control panel. The main rope is driven by friction (traction) between the suspension wheel and the main rope rotating by the motor. I do.

[0005] The hoist is provided with a brake on the output shaft side of the electric motor, and when the car is landed on a predetermined floor,
At the same time, the speed of the motor is reduced, and the brake is operated to stop driving the main rope.

As shown in FIG. 5, a guide shoe 12 having a U-shape in a plan view is symmetrically protruded from both upper and lower ends of the car, and a concave portion of the guide shoe 12 is formed at the top of the guide rail 11. By being guided on the side, the car moves up and down the hoistway.

[0007]

However, in such an elevator, the amount of elongation of the main rope from which the car is suspended varies depending on the number of users boarding the car, that is, the loaded load. Then, due to the extension of the main rope, when the car lands on a predetermined floor, a height difference occurs between the sill of the car and the sill of the landing, and there is a possibility that a user getting down from the car to the landing may stumble. .

When the height difference between the car threshold and the landing threshold increases, a method of correcting the height difference within a predetermined range by a detector that detects the difference has been adopted. This may also cause the user to feel uneasy or impatient. Further, not only takes time for positioning, but also if the car moves up and down minutely for positioning, the user inside the car also feels uneasy.

FIG. 6 is a graph showing a state in which the position of the car fluctuates up and down when the car on which a passenger near the capacity is boarded descends on the hoistway and lands on a predetermined floor. Shows the case without brake.

As shown in FIG. 6, when the number of passengers in the car is small, the main ropes are not extended so that the car which stops at the position indicated by the solid line C and the broken line following this line is limited to the number of users. When the vehicle gets on, it converges while swinging up and down as shown by a wavy curve G.

However, before the convergence, the swing from the straight line C to the lower limit position H of the initial wave of the curve G occurs up and down at the maximum value, so that the passengers in the car feel uncomfortable. May give. Therefore, an object of the present invention is to
It is an object of the present invention to provide an elevator that can be accurately and smoothly positioned regardless of the number of users in a car.

[0012]

According to a first aspect of the present invention, there is provided a main rope wound around a drive wheel controlled by a control unit, and the main rope is suspended on one side of the main rope and vertically moved through a guide rail. In an elevator provided with a car that moves up and down a road, brakes are provided on both sides of the car that are opposed to the guide rail and generate a frictional force between the guide rail and a signal from a control unit.

The elevator according to the present invention is characterized in that a drive unit brake provided in the drive unit and a means for operating the car brake are provided by a landing signal from the car control unit. I do.

[0014] The elevator according to the third aspect of the present invention is characterized in that a means for adjusting a braking force of a car brake by a load signal for detecting a car load is provided.
According to a fourth aspect of the present invention, there is provided an elevator, wherein a means for turning on a brake of the car by a shift signal of a landing position of the car is provided.

In the elevator according to the present invention, a lever is provided on both sides of the guide rail and one side thereof, a support portion for swingably supporting an intermediate portion of the lever, and a lever on the other side of the lever. A car brake is constituted by an electromagnet provided therebetween.

Further, the elevator according to the invention according to claim 6 is a car comprising a guide support portion for guiding and supporting a guide shoe opposed to a guide rail, and a return spring and an electromagnetic coil inserted through the guide support portion. The brake is configured.

According to the present invention, a braking force is applied to the car that moves up and down by the extension of the main rope even when the lifting and lowering operation is completed. Prevent shaking.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the elevator according to the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment of an elevator according to the present invention. In FIG. 1, a motor room 4 serving as a drive source of a hoist is installed in a machine room 20a provided at an upper end of a hoistway 20. A brake shoe (not shown) of a paramagnetic excitation type electromagnetic brake 8 is provided on the output shaft of the electric motor 4.
Is fixed to the base of the hoist.

The end of the output shaft of the electromagnetic brake 8 is connected to a speed reducer, and the pulling wheel 5 is pressed into the output shaft of the speed reducer via a key (not shown). On the lower left side of the dropper 5, a deflecting car slightly smaller than the dropper 5
21 is fixed to a machine beam (not shown).

The main ropes 2 are wound around a plurality of grooves formed on the outer periphery of the lifting wheel 5, and one side of the main ropes 2 is wound around a deflector wheel 21. And a counterweight 3 is suspended from the lower end.

On the other hand, the other side of the main rope 2 also hangs down the hoistway 20,
A car 1 is suspended from a lower end of the main rope 2 via a main rope fixing rod (not shown), a compression coil spring, or the like. On the inner surface of the wall 19 of the hoistway 20, there are a plurality of mounting brackets, which are omitted in detail.
A guide rail 11 having a T-shaped cross section is provided vertically and parallel through 19a.

The same guide shoe 12 as the prior art guide shoe 12 shown in FIG. 5 is symmetrically protruded on the upper, lower, left and right sides of the car 1, and the guide portion of the guide shoe 12 is a guide rail 11 Are loosely fitted on both sides of the top surface.

An enlarged detailed view of the guide shoe 12 shown in the "A" portion on the upper right side of the car 1 and its peripheral portion is shown inside the frame indicated by the one-dot chain line on the right side. That is, at the upper end of the car 1, FIG.
A car brake 9 described later is mounted, and a guide shoe 12 is mounted and fixed on the upper surface of the brake 9.

FIG. 2 is an enlarged detailed sectional view taken along the line BB of FIG.
This brake 9 is always non-excited and is provided on both sides of the upper end of the car via fixing portions 9a.

On both sides of the fixed portion 9a, an intermediate portion of a lever 9b whose right end facing surface is opposed to the head of the guide rail 11 is swingably and symmetrically mounted via a support shaft 9c. .

An electromagnet 14 is provided on the left end facing surface of the lever 9b, and a pair of armatures 14a are loosely fitted inside a coil provided at the center of the electromagnet 14, and these armatures 14a The end surface of the portion protruding from the coil is in contact with the inner surface of the lever 9b.

Between the pair of levers 9b, the coil spring 13 is inserted in a slightly compressed state with respect to the position on the right side of the fixed portion 9a. The left end opposing surface contacts the opposing surface with the armature 14a, and maintains a predetermined gap between the right end opposing surface of the lever 9b and the side surface of the head of the guide rail 11.

Further, a lower end of a support rod 10a is fixed to a fixing portion 9a of the brake 9, and a pair of light emitting and detecting the reflected light of the emitted light operate on the upper end of the support rod 10a. The position detector 10 protrudes from the right side. On the guide rail side of the position detector 10, a reflection plate 18 is provided at a predetermined position for each floor, and is fixed to a wall of the hoistway via a support rod 18a.

A speed control circuit 7 and a car stop position detecting section 17 are incorporated in a control panel 6 installed in the machine room, and the speed control signal of the former speed control section 7 is transmitted to the electric motor 4 and the electromagnetic The detection signals input to the brakes 8 and 9 and detected by the position detector 10 are input to the stop position detection unit 17.

Next, the operation of the thus configured elevator will be described. The end position detection when the car arrives on the floor of the destination floor is performed by the position detector 10 and the reflector 18.

That is, from the position detector 10, the reflection plate 18
The light is projected onto the surface of the device, and by detecting the reflected light of the light with the light receiving element, when the light is detected by the upper and lower position detectors 10, the person is landing at a predetermined position with a predetermined accuracy. Detect that.

If only the upper position detector 10 detects light, it is detected that the car is lower than a predetermined position, and conversely, only the lower position detector 10 emits light. If it is detected, it is detected that it is higher than a predetermined position.

Therefore, when the descending car descends below the predetermined stop position, the detection signal of the lower position detector 10 is not input to the stop position detector 17, but the speed at which this signal is input is The control unit 7 rotates the electric motor 4 in the reverse direction to slightly raise the car.

FIG. 3 is a car position change curve showing the displacement of the car position due to the strength of the car brakes when the car on which the passengers near the occupant have descended and land on a predetermined floor. .

In FIG. 3, a straight line C consisting of a horizontal solid line and a broken line following the solid line is similar to the straight line C shown in FIG.
This indicates a light load time when the number of passengers in the car is small, and the car stops at a position where the threshold of the landing and the threshold of the car are substantially flush with each other.

Curve E shows the case where the brake is applied to the car according to the present invention, the number of passengers in the car reaches the capacity, and the car brake is rapidly applied. In this case, the vehicle is stopped in a short time at the stop position D which is lower by an amount corresponding to the extension of the main rope by the load.

On the other hand, a curve F shows a case where the brake of the car is gradually operated, and it takes time to reach the stop position D. Therefore, the change in the acceleration received by the passenger in the car is moderate.

When the difference between the stop position D and the straight line C is large and the deviation of the stop position of the car exceeds the allowable value,
As described above, the signal detected by the position detector 10 is input to the stop position detection unit 17, and in the stop position detection unit 17,
A signal corresponding to the shift amount is output to the speed detector 7.

As a result, the electric motor 4 is driven. At this time, the speed controller 7 outputs an off command to the brake 8 in the machine room and outputs an on command to the brake 9 of the car. . Therefore, it is possible to avoid the swing of the stop curve of the car that fluctuates in the vertical direction as shown by the curve G of the waveform in FIG. 6, and to give the passenger a comfortable ride.

FIG. 4 is a partial cross-sectional view showing an elevator according to a second embodiment of the present invention, which corresponds to FIG. 2 shown in the first embodiment, and particularly corresponds to claim 6, and relates to a car brake. Only shown.

In FIG. 4, a brake frame 22a having a U-shaped cross section is fixed to the upper, lower, left and right sides of the car, and an armature 22b is horizontally inserted through the brake frame 22a via a bearing 22c. I have. A U-shaped brake shoe 16 is housed at the right end of the brake frame 22a so as to be able to advance and retreat.

This armature 22b is mounted on a brake frame 22a.
Penetrate the electromagnet 14 loosely fitted to the brake frame,
A compression coil spring 13 is loosely fitted to the left side of the armature 22b, and is compressed at a predetermined mounting pressure by a spring receiver on the left side of the compression coil spring 13.

Even in an elevator having a car provided with a brake constructed as described above, when the car arrives on a predetermined floor, the electromagnet 14 is excited and the armature 22 is turned on.
4 is driven rightward in FIG. 4 and the brake shoe 16 is pressed by the right end of the armature 22b.
16 is pressed against the top surface of the guide rail 11 to decelerate and stop the car.

In this case, the deceleration when stopping the car is controlled by controlling the exciting current of the electromagnet 14. In the above embodiment, the case of the rope traction type elevator has been described. However, the present invention can be similarly applied to a back plunger type or a side plunger type hydraulic elevator.

[0045]

As described above, according to the first aspect of the present invention, the main rope wound on the drive wheel controlled by the control unit, and the main rope suspended on one side of the main rope, move up and down via the guide rail. In an elevator equipped with a car that ascends and descends the road, brakes are provided on both sides of the car that are opposed to the guide rail and generate frictional force between the guide rail and a signal from the control unit. The braking force of the car is applied to the car moving up and down by the elongation of the car to prevent the car from shaking due to the elongation of the main rope, so that it is accurate and accurate regardless of the number of users on the car. An elevator that can be positioned smoothly can be obtained.

According to a second aspect of the present invention, there is provided a drive unit brake provided in the drive unit and means for operating the car brake in response to a landing signal from the car control unit, so that the elevator operation is performed. Even after completion, the braking force of the car was applied to the car that moved up and down due to the extension of the main rope to prevent the car from shaking due to the extension of the main rope. Irrespective of this, it is possible to obtain an elevator that can be accurately and smoothly positioned.

Further, according to the invention corresponding to claim 3, means for adjusting the braking force of the car brake by a load signal for detecting the load on the car is provided, and according to the invention corresponding to claim 4, A means is provided for turning on the car brakes in response to the car landing position shift signal. Since the swing of the car due to the extension of the car is prevented, it is possible to obtain an elevator that can accurately and smoothly position the car regardless of the number of users who board the car.

Further, according to the invention corresponding to claim 5, both sides of the guide rail and one side thereof are opposed to each other, a supporting portion for swingably supporting an intermediate portion of the lever, and a lever on the other side of the lever. According to the invention corresponding to claim 6, a guide support for guiding and supporting a guide shoe opposed to the guide rail is provided, and the electromagnet provided between the guide support and the guide support. A car brake is constituted by the inserted return spring and the electromagnetic coil, and a braking force is applied to the car which moves up and down by the elongation of the main rope even when the ascending and descending operation is completed. Since the swing of the car due to the extension of the car is prevented, it is possible to obtain an elevator that can accurately and smoothly position the car regardless of the number of users who board the car.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a first embodiment of an elevator according to the present invention.

FIG. 2 is an enlarged plan view taken along the line BB of FIG. 1;

FIG. 3 is a graph showing the operation of the first embodiment of the elevator according to the present invention.

FIG. 4 is a partially enlarged plan view showing a second embodiment of the elevator according to the present invention.

FIG. 5 is a partially enlarged transverse sectional view showing an example of a conventional elevator.

FIG. 6 is a graph showing an example of the operation of a conventional elevator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cage, 2 ... Main rope, 3 ... Balance weight, 4 ... Electric motor, 5 ... Spring wheel, 6 ... Control panel, 7 ... Speed control part, 8,
9, 22 ... brake, 9a ... fixed part, 9b ... lever, 10 ...
Position detector, 11… Guide rail, 12… Guide shoe, 13
... Coil spring, 14 ... Electromagnet, 17 ... Stop position detector, 18 ...
Reflector, 19 ... wall, 20 ... hoistway, 21 ... deflected sheave.

Claims (6)

[Claims] An elevator equipped with a main rope wound around a drive wheel controlled by a control unit and a car suspended on one side of the main rope and moving up and down a hoistway via a guide rail. An elevator, wherein brakes are provided on both sides of the car so as to be opposed to rails and generate frictional force between the guide rails and the guide rails in response to a signal from the control unit. 2. The elevator according to claim 1, further comprising means for operating a drive unit brake provided in the drive unit and a brake of the car in response to a landing signal from the control unit of the car. . 3. The elevator according to claim 1, further comprising means for adjusting a braking force of a brake of the car based on a load signal for detecting a load of the car. 4. The system according to claim 4, wherein the shift signal of the car landing position is
The elevator according to any one of claims 1 to 3, further comprising means for turning on a brake of the car. 5. The car brake is provided between a lever on both sides of the guide rail opposite to one side, a support portion for swingably supporting an intermediate portion of the lever, and another side of the lever. The elevator according to any one of claims 1 to 4, wherein the elevator comprises an electromagnet. 6. The car brake comprises a guide support for guiding and supporting a guide shoe opposed to the guide rail, and a return spring and an electromagnetic coil inserted through the guide support. Claims 1 to 4
The elevator according to any one of the above.