JPH0543635B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for guiding an elevator car to a guide rail without contacting it.

[Conventional technology]

An elevator car is raised and lowered by guide devices such as a guide shoe and guide rollers provided on the car being guided by guide rails. Therefore, if there is a step at the joint of the guide rail, the car will sway, making the ride uncomfortable. Therefore, methods have been developed to guide the car to the guide rails without contacting them.

Figures 9 to 11 are, for example,
FIG. 9 is a front view, FIG. 10 is an enlarged cross-sectional view taken along the - line in FIG. 9, and FIG. 11 is an electromagnet control circuit diagram. be.

In Figs. 9 to 11, 1 and 1 are iron guide rails that are erected facing each other along the hoistway 2 and have a T-shaped cross section; 3 is a main rail that is arranged between the guide rails 1 and 1; A car frame suspended by cables 4, 5
The car chamber is installed inside the car frame 3, 6 to 8 are electromagnets fixed at two locations above and below (the lower part is not shown) on one side of the car frame 3, and 9 and 10 are approximately C-shaped. Iron cores whose end faces face opposite sides of the guide rail 1 with a space between them, 11 also face the top surface of the guide rail 1 with a space between them, and 12 to 14 represent cores 9 to 14, respectively. The coils 6A to 8A wound around the car frame 3 are electromagnets provided on the right side in FIG. 1
Reference numeral 5 denotes a spacer which is fixed to the car frame 3 and generates an output according to changes in the space between the iron core 10 and the side surface of the guide rail 1.
It can also be detected by detecting capacitance, for example. Reference numeral 16 indicates an air gap detector for detecting air on the top surface of the iron core 11 and the guide rail 1, and reference numeral 17 indicates an air gap detector for the electromagnet 7A on the right side of FIG.

In FIG. 11, 18 is an AC power supply, 19 and 20 are thyristors, and 21 and 22 are ignition circuits corresponding to the thyristors 19 and 20, which operate differentially with each other according to the output of the empty detector 15. In addition to the circuits shown in FIG. 11, one set is provided for the electromagnets 8 and 8A, and one set is provided for the electromagnets 6A and 7A, as well as in the lower part of the car frame 3. however,
The power supply 18 is shared by all.

A conventional elevator car guiding device is constructed as described above, and its operation is mainly controlled by electromagnets 6 to 6.
8 will be explained.

If the air on the sides of the iron core 10 and the guide rail 1 has reached a predetermined value, the output of the air sensor 15 controls the firing circuits 21 and 22 and the thyristors 19 and 20 at appropriate firing angles, and the coil 12 and 13 are energized so that the attraction forces of electromagnets 6 and 7 are equal to each other. In this state, the car frame 3 moves up and down.

Now, the sky on the sides of the iron core 10 and guide rail 1
becomes narrower than a predetermined value (the space between the iron core 9 and the side of the guide rail 1 becomes wider), then the space becomes narrower than the predetermined value.
The detector 15 emits a corresponding output, and the ignition circuits 21 and 22 operate together to trigger the thyristor 1.
By controlling the firing angles 9 and 20, the biasing of the coil 12 is strengthened and the biasing of the coil 13 is weakened. That is, the attractive force of the electromagnet 6 is strengthened, and the attractive force of the electromagnet 7 is weakened. As a result, the electromagnet 6 approaches the guide rail 1, and the electromagnet 7 moves away, so that the distance between the electromagnets 6 and 7 is always kept constant. The same applies to the electromagnets 6A and 7A, and the space in the front and rear directions of the car compartment 4 is kept constant by these. Also, electromagnet 8, 8A
The same is true for the cage 5, and the left-right space of the car 5 is kept constant. As a result, the car frame 3 is guided without contacting the guide rail 1, and the car compartment 5
The ride comfort will be improved.

[Problem that the invention seeks to solve]

In the conventional elevator car guide device as described above, the electromagnets 6 to 8 and 6A to 8A face both sides and the top surface of the guide rail 1.
Twelve pieces (six pairs) are required for each elevator, and the structure of the mounting part is extremely complicated. Similarly, ignition circuits 21 and 22 of thyristors 19 and 20
12 circuits are required, and the control circuit becomes large. There are other problems.

This invention was made in order to solve the above-mentioned problems.Eight electromagnets are required for each elevator, and the ignition circuit only needs eight times, and both the electromagnet mounting part and the control circuit can be easily constructed. The purpose of the present invention is to provide a guide device for an elevator car.

[Means for solving problems]

In the elevator car guide device according to the present invention, the cross-sectional outline of the guide rail is formed into a substantially triangular shape, and the apexes of this triangular shape are arranged to face each other to form two sides sandwiching the apexes. Electromagnets are placed facing each other on the surface.

[Effect]

In this invention, since the electromagnets are disposed facing each other on two sides of the guide rail having a substantially triangular cross section, only eight electromagnets are required for one elevator, and the control circuit is accordingly simplified.

〔Example〕

1 to 4 are diagrams showing an embodiment of the present invention, in which FIG. 1 is a cross-sectional view taken along the - line in FIG. 2, FIG. 2 is a front view, and FIG. 3 is a control circuit diagram of an electromagnet. FIG. 4 is a flowchart showing the operation of the arithmetic device,
The same symbols as in the conventional device indicate the same parts.

In FIGS. 1 and 2, reference numeral 23 denotes a guide rail that is erected along the hoistway 2 and is made of a hollow iron material with a substantially triangular cross section, and is arranged with the apexes of the triangular shape facing each other. , the end faces of the iron cores 9 and 10 of the electromagnets 6 and 7 are respectively guided by guide rails 23.
It faces the side surface 23a (the surface forming the two sides sandwiching the apex of the triangle) with an air in between. The electromagnets 6A and 7A have iron cores 24 and 25 and coils 26,
27, and the end surfaces of the iron cores 24 and 25 are arranged opposite to the side surface 23a of the guide rail 23. The empty detector 15 detects the iron core 10 and the side surface 2 of the guide rail 23.
Similarly, the void detectors 17, 28, 29 are arranged to detect the void of the electromagnets 7A, 3a.
6 and 6A. electromagnet 6,
7, 6A, 7A and empty detector 28, 15, 2
Something similar to 9 and 17 is also installed at the bottom of the car 3.

In Fig. 3, 30 is empty detector 28, 15, 2
9, 17 is a calculation device consisting of a microcomputer that calculates the inclination of the car frame 3.
30A, a memory 30B, an input circuit 30C, and an output circuit 30D, and the input circuit 30C is connected to empty detectors 28, 15, 29, and 17. 31
~34 are connected to the output circuit 30D and the coils 12,
Thyristor 35 ~ connected to 13, 26, 27
This is the ignition circuit that ignites the 38. Note that a similar circuit is also provided for the electromagnet at the bottom of the car frame 3.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG. 4 (stored in the memory 30B of the arithmetic unit 30).

If the air space between the detectors 28, 15, 29, 17 and the side surface 23a of the guide rail 23, in other words, the air space between the iron cores 9, 10, 24, 25 and the side surface 23a, has reached a predetermined value. , sky = detection 28, 15, 2
Based on the outputs of 9 and 17, the arithmetic unit 30 controls the thyristors 35 to 38 at appropriate firing angles via the ignition circuits 31 to 34, and the coils 12, 13, 26,
27 is energized, and the attraction forces of the electromagnets 6, 7, 6A, and 7A are equal to each other. In this state, the car frame 3 moves up and down.

Now, in step (41), the space y between the space detector 28 and the side surface 23a of the guide rail 23 is detected,
In step (42), it is determined whether the empty value y is equal to a predetermined value x. Empty If y is equal to the predetermined value x, the process returns to step (41) and the subsequent steps (43) to
(45) is not executed.

If it is determined that the empty value y is not equal to the predetermined value x, the process proceeds to step (43), and it is determined whether the empty value y is smaller than the predetermined value x. When it is determined that the empty space y is smaller than the predetermined value x, that is, the empty space between the empty sensor 28 and the guide rail 23 has become narrow, the firing circuit 31 is instructed to increase the firing angle in step (44). issue instructions to. The thyristor 35 is now controlled, the energization of the coil 12 is weakened, and the electromagnet 6 is
The attraction force of the electromagnet 6 weakens, and the electromagnet 6
move away from When it is determined in step (43) that the air gap y is larger than the predetermined value x, that is, the air gap between the air gap detector 28 and the guide rail 23 has become wider, the ignition angle is sent to the ignition circuit 31 in step (45). Issue a command to make it smaller. As a result, the attraction force of the electromagnet 6 is strengthened, and the electromagnet 6 approaches the guide rail 23. The other electromagnets 7, 6A, and 7A are similarly controlled.

In this way, the calculation device 30 calculates in which direction the car frame 3 is currently tilting, and how the electromagnets 6, 6A, 7, and 7A should be energized to cause the car frame 3 to tilt. It is calculated whether a force in the opposite direction to the intended direction can be generated and whether the car frame 3 can be returned to a predetermined position.
Based on the calculation result, the calculation device 30 issues a command to the ignition circuits 31 to 34, and
34 controls the firing angles of the thyristors 35 to 38 to adjust the energization of the coils 12, 13, 26, and 27. Now, the empty detectors 28, 15, 29, 1
7 and the guide rail 23, in other words, the gap between the electromagnets 6, 7, 6A, 7A and the guide rail 23 is always kept constant.

Further, the same applies to the electromagnet provided at the lower part of the car frame 3.

FIG. 5 is a view corresponding to FIG. 1 showing another embodiment of the present invention, in which the guide rail 23 has a substantially L-shaped cross section and a triangular shape with no side on the hoistway 2 side. It is clear that similar effects can be obtained even with such a shape.

Figures 6 to 8 also show other embodiments of the invention, with Figure 6 being a view equivalent to Figure 1, Figure 7 being a conceptual plan view of the emergency stop device, and Figure 8 being a front view as well. be.

In this embodiment, the guide rail 23 has a substantially triangular cross section, and a protruding portion 23b that protrudes toward the car frame 3 is provided at the apex of this triangular shape over its entire length.

Now, an emergency stop device 52 commonly used in elevators is provided at the lower part of the car frame 3 and consists of grips 53 and 54 and a roller 55. The gripping tool 53 has a parallel surface separated from the side surface of the guide rail 1 by a space, and the gripping tool 54 also has an inclined surface, and a roller 55 is disposed between this inclined surface and the side surface of the guide rail 1. There is. Although a detailed explanation is omitted, when the speed governor (not shown) is activated when the car frame 3 is lowered, the car frame 3, that is, the grippers 53 and 54 are lowered while the roller 55 is stopped, so that the relative Specifically, the roller 55 is pushed up between the inclined surface of the gripper 54 and the side surface of the guide rail 1, so that the car frame 3 suddenly stops.

However, with the cross-sectional shape of the guide rail 23 shown in FIG. 1, the emergency stop device 5 shown in FIGS.
2 cannot be applied, and a new emergency stop device must be designed. Projection 23 in Fig. 6
b makes this possible; the protrusion 23b performs the same function as the conventional guide rail 1, and the emergency stop device 52 can be used as is.
Note that this protrusion 23b was provided at the triangular apex of the guide rail 23, but the electromagnets 6, 7, 6A,
It may be installed anywhere as long as it does not come into contact with 7A or the like.

Further, although the guide rail 23 in FIGS. 1, 5, and 6 has a hollow cross section, there is no problem even if the guide rail 23 has a solid cross section.

〔Effect of the invention〕

As explained above, in this invention, the outer shape of the cross section of the guide rail is formed into a substantially triangular shape, the apexes of this triangular shape are arranged to face each other, and the electromagnetic magnet is placed on the surfaces forming the two sides sandwiching the apexes. Since they are arranged facing each other, only eight electromagnets are required per elevator, which has the effect of simplifying both the mounting part and the control circuit.

[Brief explanation of the drawing]

1 to 4 are diagrams showing an embodiment of the elevator car guiding device according to the present invention, in which FIG. 1 is a cross-sectional view taken along the - line in FIG. 2, FIG. 2 is a front view, and FIG. A control circuit diagram of the electromagnet, FIG. 4 is a flowchart showing the operation of the arithmetic unit, and FIGS. 5 to 8 are diagrams showing other embodiments of the present invention.
The figure is a diagram equivalent to Figure 1, Figure 7 is a conceptual plan view of the emergency stop device, Figure 8 is a front view of Figure 7, and Figures 9 to 1.
1 is a diagram showing a conventional elevator car guiding device, FIG. 9 is a front view, FIG. 10 is a sectional view taken along the line -- in FIG. 9, and FIG. 11 is a control circuit diagram of an electromagnet. In the figure, 2 is a hoistway, 3 is a car (car frame), 5 is a car (cage room), 6, 7, 6A, 7A are electromagnets,
15 and 17 are empty detectors, 23 is a guide rail,
23a is a side surface, 28 and 29 are empty detectors, and 30 is a calculation device. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. Guide rails made of magnetic material are erected facing each other along the hoistway, a car is placed between the guide rails, and a car is blown horizontally onto the guide rails. A plurality of electromagnets facing each other and a sky detector for detecting the sky are installed,
In the apparatus for guiding the elevator car by controlling the electromagnet using the output of the empty detector, the guide rail is formed into a substantially triangular shape in cross section, and the vertices of the triangle are opposed to each other. A guide device for an elevator car, characterized in that the electromagnets are arranged facing each other on the side faces forming two sides sandwiching the apex. 2. The guide device for an elevator car according to claim 1, wherein a protrusion for gripping an emergency stop device is formed on a portion of the guide rail facing the car over the entire length and protrudes toward the car.