JP2003040563A - Position detector for elevator door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in a conventional position detector for an elevator concerning maintenance because of a mechanical control switch which causes an unstable action position point. SOLUTION: A magnet 3 is provided on a door hanger 2 at an upper part of an elevator car door 1, and a magnetic proximity switch 6 is provided above the magnet 3 in such a way that it becomes the closest to the magnet 3 when the elevator car door is totally closed. When the elevator car door is totally closed, a magnetic circuit is formed inside the magnetic proximity switch 3 by magnetic force of the magnet 3. A contact point thus gets ON, and the magnetic proximity switch 6 outputs a signal that the elevator car door 1 is totally closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position detector for elevator doors.

[0002]

2. Description of the Related Art As an invention of an elevator door position detector, for example, in Japanese Patent No. 2549215, an operation cam is attached to an upper portion of an elevator car door, and a mechanical operation is performed by the operation cam when the door is fully opened or closed. It is disclosed that two control switches are provided to facilitate inspection and adjustment work of the control switches. Further, as an elevator door position detector, there is an example in which a shield operation type optical proximity switch or a shield operation type magnetic proximity switch is used. In addition, as another conventional technique, Japanese Patent Laid-Open No. 8-
2863 Elevator door closing confirmation device, JP-A-8-
There are 119563 elevator door control devices and the like.

[0003]

A conventional elevator door position detector using a mechanical control switch has a problem in that the position of the switch is affected by the wear of the actuating cam and each part of the switch over time and the adhesion of dust to the actuating cam. The operating position will change slightly. Therefore, there is a problem that adjustment of the operating position of the switch, cleaning, refueling, and replacement of worn parts are necessary. Also, when using a shield operation type optical proximity switch as a position detector of an elevator door, the switch malfunctions due to diffused reflection of sunlight, or the light amount of the light emitting diode, which is the light emitter, is attenuated over the course of time. I had to replace it. Further, when the shield operation type magnetic proximity switch is used, the magnetic shield plate is attached to the door hanger. Therefore, there is a problem that a predetermined gap must be provided between the magnetic proximity switch and the magnetic shield plate in consideration of the collapse of the door hanger, the magnetic proximity switch becomes large, and the elevator door device cannot be downsized.

The present invention is intended to solve the above-mentioned problems, and it is possible to continuously output accurate position detection of an elevator door, and to replace parts of the position detector, adjust the operating position, clean, refuel, etc. An object of the present invention is to provide a position detector for an elevator door that is unnecessary and compact.

[0005]

A position detector for an elevator door according to the present invention comprises a magnet provided on a door hanger above the elevator door, and a magnetic proximity switch provided above the magnet when the elevator door is fully closed. And is provided.

An elevator door position detector according to the present invention comprises a magnetic proximity switch provided on a door hanger above the elevator door and a magnet provided above the magnetic proximity switch when the elevator door is fully closed. Characterize.

In the elevator door position detector according to the present invention, a second magnetic proximity switch is provided near the magnet provided on the door hanger at the top of the door when the elevator door is fully opened, or when the elevator door is fully opened. The second magnetic detection switch is provided in the vicinity of the magnet provided on the upper surface of the door hanger.

The elevator door position detector according to the present invention is provided with a second magnet near the magnetic proximity switch provided on the door hanger at the top of the door when the elevator door is fully opened, or at the top of the door when the elevator door is fully opened. A second magnet is provided in the vicinity of the magnetic proximity switch provided on the upper surface of the hanger.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a position detector for an elevator door according to the present invention will be described below with reference to the accompanying drawings.

Embodiment 1. 1 and 2 are diagrams showing a configuration of a position detector for an elevator door according to the first embodiment, and FIG. 1 is a front view of a state in which an elevator car door 1 is fully closed as seen from a landing side mailto: s @ 3. FIG. 2 is a side view of the elevator car door 1 viewed from the side. As shown in these figures, 1 is an elevator car door, 2 is a door hanger that suspends the elevator car door 1,
3 is a magnet provided above the door hanger 2,
Reference numeral 4 is a door rail for sliding the door hanger 2. 5 is a door hanger case that houses the door hanger 2,
A magnetic proximity switch 6 is provided on the back surface of the door hanger case 5 and faces the magnet 3 when the elevator car door 1 is fully closed.

The operation of the elevator door position detector according to the first embodiment will be described below. As shown in FIGS. 1 and 2, when the elevator car door 1 is fully closed, the magnet 3 provided on the door hanger 2 above the elevator car door 1 and the magnetic proximity switch 6 provided above the magnet 3 are at their maximum. approach. Therefore, as shown in FIG. 3, the magnetic proximity switch 6 is driven by the magnetic force of the magnet 3.
, A magnetic path is formed inside, the contacts are turned on, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is fully closed.

Next, when the elevator car door 1 is opened,
Since the magnet 3 integrated with the elevator car door 1 moves leftward, the magnet 3 and the magnetic proximity switch 6 are separated by a predetermined distance or more. Finally, the contacts of the magnetic proximity switch 6 are turned off, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is open.

Next, the relationship between the magnet 3 and the magnetic proximity switch 6 will be described with reference to FIGS. As shown in FIG. 4, when the gap between the magnet 3 and the magnetic proximity switch 6 becomes large, the operating position point fluctuates. As in the first embodiment, the magnet 3 is provided on the upper part of the door hanger 2,
If the magnetic proximity switch 6 is provided on the back surface of the door hanger case 5, the door hanger 2 will be centered around the door rail 4.
As shown in FIG. 5, since the gap D between the magnet 3 and the magnetic proximity switch 6 hardly changes, the magnetic detection switch 6 detects the stable operation position point X of the door such that the fluctuation width is ΔX. Can be output.

Embodiment 2. Next, the position detector of the elevator door according to the second embodiment will be described. 6 and 7 are views showing the configuration of the elevator door position detector according to the second embodiment, and FIG. 6 is a front view of the elevator car door 1 in a fully closed state as seen from the landing side. FIG. 7 is a side view of the elevator car door 1 viewed from the side. The second embodiment is different from the first embodiment shown in FIGS. 1 and 2 in that a magnetic proximity switch 6 is provided on a door hanger 2 above an elevator car door 1, and a magnetic proximity switch when the elevator car door 1 is fully closed. The point is that the magnet 3 is provided above 6. For other configurations, the first embodiment
Is the same as or equivalent to.

The operation of the elevator door position detector according to the second embodiment will be described below. As shown in FIGS. 6 and 7, when the elevator car door 1 is fully closed, the magnetic proximity switch 6 provided on the door hanger 2 above the elevator car door 1 and the magnet 3 provided above the magnetic proximity switch 6. Comes closest. For this reason, a magnetic path is formed inside the magnetic proximity switch 6 by the magnetic force of the magnet 3, the contacts are turned on, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is fully closed.

Next, when the elevator car door 1 is opened,
Since the magnetic proximity switch 6 integrated with the elevator car door 1 moves to the left, the magnetic proximity switch 6 and the magnet 3 are separated by a predetermined distance or more. Finally, the contacts of the magnetic proximity switch 6 are turned off, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is open.

As described above, if the magnetic proximity switch 6 is provided on the upper portion of the door hanger 2 and the magnet 3 is provided on the back surface of the door hanger case 5, even if the door hanger 2 is tilted about the door rail 4, the above-mentioned drawings will be described. As shown in 5,
Since the gap D between the magnet 3 and the magnetic proximity switch 6 hardly fluctuates, the magnetic proximity switch 6 can detect and output a stable door operation position point X such that the fluctuation width is ΔX.

Embodiment 3. Next, an elevator door position detector according to the third embodiment will be described with reference to FIGS. 8 and 9. 8 and 9 are views showing the configuration of the elevator door position detector according to the third embodiment, and FIG. 8 is a view of the elevator car door 1 fully closed from the landing side. FIG. 9 is a view of the elevator car door 1 when it is fully opened, as seen from the landing side. Embodiment 3 is shown in FIG.
The second embodiment is different from the first embodiment shown in FIG. 2 in that when the elevator car door 1 is fully opened, the second magnetic proximity switch 7 is provided above the magnet 3 provided on the door hanger 2 above the elevator car door 1. . Other configurations are the same as or equivalent to those in the first embodiment.

The operation of the elevator door position detector according to the third embodiment will be described below. As shown in FIG. 8, when the elevator car door 1 is fully closed, the magnet 3 provided on the door hanger 2 above the elevator car door 1 and the magnetic proximity switch 6 provided above the magnet 3 are closest to each other. For this reason, a magnetic path is formed inside the magnetic proximity switch 6 by the magnetic force of the magnet 3, the contacts are turned on, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is fully closed.

Next time the elevator car door 1 opens,
Since the magnet 3 integrated with the elevator car door 1 moves leftward, the magnet 3 and the magnetic proximity switch 6 are separated by a predetermined distance or more. Finally, the contacts of the magnetic proximity switch 6 are turned off, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is open.

Further, as shown in FIG. 9, when the elevator car door 1 is fully opened, the magnet 3 provided on the door hanger 2 above the elevator car door 1 and the magnet 3 are provided.
And the second magnetic proximity switch 7 provided above the switch comes closest. Therefore, a magnetic path is formed inside the second magnetic proximity switch 7 by the magnetic force of the magnet 3, and the contact becomes O.
In the N state, the second magnetic proximity switch 7 outputs a signal indicating that the elevator car door 1 is fully opened.

Next, when the elevator car door 1 is closed, the magnet 3 integrated with the elevator car door 1 moves to the right, so that the magnet 3 and the second
The magnetic proximity switch 7 is separated by a predetermined distance or more. Finally, the contact of the second magnetic proximity switch 7 is turned off, and the second magnetic proximity switch 7 outputs a signal indicating that the elevator car door 1 is not fully opened.

In this way, the magnet 3 is attached to the door hanger 2
With the configuration in which the magnetic proximity switch 6 and the second magnetic proximity switch 7 are provided on the upper portion and provided on the back surface of the door hanger case 5, even if the door hanger 2 tilts around the door rail 4, as shown in FIG. 5 described above. In addition, since the gap D between the magnet 3 and the magnetic proximity switch 6 and the gap D between the magnet 3 and the second magnetic proximity switch 7 hardly change, the stable operation position point X of the door such that the fluctuation width is ΔX.
Can be detected and output by the magnetic proximity switch 6 and the second magnetic proximity switch 7.

Fourth Embodiment Next, an elevator door position detector according to the fourth embodiment will be described with reference to FIGS. 10 and 11. 10 and 11 are diagrams showing the configuration of the elevator door position detector according to the fourth embodiment.
0 is a view of the elevator car door 1 when it is fully closed, as seen from the landing side. Figure 11 shows elevator car door 1
It is the figure which looked at the state of full opening from the hall side. The difference between the fourth embodiment and the second embodiment shown in FIG. 6 is that when the elevator car door 1 is fully opened, the second embodiment is provided below the magnet 3 provided on the back surface of the door hanger case 5 above the elevator car door 1. The magnetic proximity switch 7 is provided. Other configurations are the same as or equivalent to those in the second embodiment.

The operation of the elevator door position detector according to the fourth embodiment will be described below. As shown in FIG. 10, when the elevator car door 1 is fully closed, the magnetic proximity switch 6 provided on the door hanger 2 above the elevator car door 1 and the magnet 3 provided above the magnetic proximity switch 6 are closest to each other. To do. For this reason, a magnetic path is formed inside the magnetic proximity switch 6 by the magnetic force of the magnet 3, the contacts are turned on, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is fully closed.

Next, when the elevator car door 1 is opened,
Since the magnetic proximity switch 6 integrated with the elevator car door 1 moves to the left, the magnetic proximity switch 6 and the magnet 3 are separated by a predetermined distance or more. Finally, the contacts of the magnetic proximity switch 6 are turned off, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is open.

Further, as shown in FIG. 11, when the elevator car door 1 is fully opened, a second magnetic proximity switch 7 provided on the door hanger above the elevator car door 1,
The magnet provided above the second magnetic proximity switch 7 comes closest. For this reason, a magnetic path is formed inside the second magnetic proximity switch 7 by the magnetic force of the magnet 3, and the contact is turned on. The second magnetic proximity switch 7 indicates that the elevator car door 1 is fully opened. Output a signal.

Next, when the elevator car door 1 is closed, the second magnetic proximity switch 7 integrated with the elevator car door 1 moves to the right, so that the second magnetic proximity switch 7 and the magnet 3 are moved. Are separated by a predetermined distance or more. Finally, the contact of the second magnetic proximity switch 7 is turned off, and the second magnetic proximity switch 7 outputs a signal indicating that the elevator car door 1 is not fully opened.

If the magnet 3 is provided on the back surface of the door hanger case 5 above the door hanger and the magnetic proximity switch 6 and the second magnetic proximity switch 7 are provided above the door hanger 2, the door rail 4 is centered. Even if the door hanger 2 is tilted at the same time, as shown in FIG. 5, the gap D between the magnet 3 and the magnetic proximity switch 6 and the gap D between the magnet 3 and the second magnetic proximity switch 7 hardly change. A stable door operation position point X having a fluctuation width of ΔX can be detected and output by the magnetic proximity switch 6 and the second magnetic proximity switch 7.

Embodiment 5. Next, a position detector for an elevator door according to the fifth embodiment will be described with reference to FIGS. 12 and 13. 12 and 13 are diagrams showing the configuration of a position detector for an elevator door according to the fifth embodiment, and FIG.
2 is a view of the elevator car door fully closed as viewed from the landing side. FIG. 13 is a view of the elevator car door when it is fully opened, viewed from the landing side. Embodiment 5
However, the difference from the second embodiment shown in FIG. 6 is that when the elevator car door 1 is fully opened, above the magnetic proximity switch 6 provided on the door hanger 2 above the elevator car door 1,
The second magnet 8 is provided. Other configurations are the same as or equivalent to those in the second embodiment.

The operation of the elevator door position detector according to the fifth embodiment will be described below. As shown in FIG. 12, when the elevator car door 1 is fully closed, the magnetic proximity switch 6 provided on the door hanger 2 above the elevator car door 1 and the magnet 3 provided above the magnetic proximity switch 6 are closest to each other. To do. For this reason, a magnetic path is formed inside the magnetic proximity switch 6 by the magnetic force of the magnet 3, the contacts are turned on, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is fully closed.

Next time the elevator car door 1 opens,
Since the magnetic proximity switch 6 integrated with the elevator car door 1 moves to the left, the magnetic proximity switch 6 and the magnet 3 are separated by a predetermined distance or more. Finally, the contacts of the magnetic proximity switch 6 are turned off, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is open.

Further, as shown in FIG. 13, when the elevator car door 1 is fully opened, a magnetic proximity switch 6 provided on the door hanger 2 above the elevator car door 1 and a second magnetic proximity switch 6 provided above the magnetic proximity switch 6. Magnet 8
And are closest to each other. Therefore, a magnetic path is formed inside the magnetic proximity switch 6 by the magnetic force of the second magnet 8,
The contact is turned on, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is fully opened.

Next, when the elevator car door 1 is closed, the magnetic proximity switch 6 integrated with the elevator car door 1 moves to the right, so that the magnetic proximity switch 6 and the second magnet 8 are set to predetermined positions. Separate more than a distance.
Finally, the contacts of the magnetic proximity switch 6 are turned off, and the magnetic proximity switch 6 becomes the elevator car door 1
Outputs a signal indicating that is not fully open.

If the magnetic proximity switch 6 is provided on the upper part of the door hanger 2 and the magnet 3 and the second magnet 8 are provided on the rear surface of the door hanger case 5 as described above,
Even if the door hanger 2 tilts around the door rail 4, the gap D between the magnet 3 and the magnetic proximity switch 6 and the gap D between the second magnet 8 and the magnetic proximity switch 6 are almost as shown in FIG. Since it does not fluctuate, the magnetic detection switch 6 can detect and output a stable door operation position point X having a fluctuation width of ΔX.

Sixth Embodiment Next, an elevator door position detector according to the sixth embodiment will be described with reference to FIGS. 14 and 15. 14 and 15 are diagrams showing the configuration of a position detector for an elevator door according to the sixth embodiment.
4 is a view of the elevator car door 1 when it is fully closed, as viewed from the landing side. Figure 15 shows elevator car door 1
It is the figure which looked at the state of full opening from the hall side. The sixth embodiment is different from the first embodiment shown in FIG. 1 in that when the elevator car door 1 is fully opened, the elevator car door 1 is opened below the magnetic proximity switch 6 provided on the back surface of the door hanger case 5 above the elevator car door 1. The point is that the two magnets 8 are provided. Other configurations are the same as or equivalent to those in the first embodiment.

The operation of the elevator door position detector according to the sixth embodiment will be described below. As shown in FIG. 14, when the elevator car door 1 is fully closed, the magnet 3 provided on the door hanger 2 above the elevator car door 1 and the magnetic proximity switch 6 provided above the magnet 3 are closest to each other. For this reason, a magnetic path is formed inside the magnetic proximity switch 6 by the magnetic force of the magnet 3, the contacts are turned on, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is fully closed.

Next, when the elevator car door 1 is opened,
Since the magnet 3 integrated with the elevator car door 1 moves leftward, the magnet 3 and the magnetic proximity switch 6 are separated by a predetermined distance or more. Finally, the contacts of the magnetic proximity switch 6 are turned off, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is open.

Further, as shown in FIG. 15, when the elevator car door 1 is fully opened, a second magnet 8 provided on the door hanger above the elevator car door 1 and a magnetic proximity provided above the second magnet 8 are provided. The switch 6 comes closest. For this reason, a magnetic path is formed inside the magnetic proximity switch 6 by the magnetic force of the second magnet 8, the contacts are turned on, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is fully opened. .

Next, when the elevator car door 1 is closed, the second magnet 8 integrated with the elevator car door 1 moves to the right, so that the second magnet 8 and the magnetic proximity switch 6 are separated from each other. Stay at least a certain distance. Finally, the contact of the magnetic proximity switch 6 is turned off.
Then, the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is not fully opened.

If the magnetic proximity switch 6 is provided on the back surface of the door hanger case 5 above the door hanger and the magnet 3 and the second magnet 8 are provided above the door hanger 2, the door rail 4 is centered on the door. Even if the hanger 2 tilts, the gap D between the magnet 3 and the magnetic proximity switch 6 and the gap D between the second magnet 8 and the magnetic proximity switch 6 hardly change, as shown in FIG. It is possible to detect and output a stable door operation position point X such as ΔX by the magnetic detection switch 6.

Seventh Embodiment Next, an elevator door position detector according to a seventh embodiment will be described with reference to FIGS. 16 and 17. 16 and 17 are views showing the configuration of the position detector for the elevator door according to the seventh embodiment, and FIG. 16 is the elevator car door 1
It is the front view which looked at the fully closed state from the landing side. See also FIG.
7 is a side view of the elevator car door 1 as viewed from the side. This Embodiment 7 is Embodiment 1 shown in FIG. 1 and FIG.
The difference is that the magnet 3 is installed on the door hanger 2 above the elevator car door 1, and the elevator car door 1
The magnetic proximity switch 6 is provided on the lateral surface of the door hanger case 5 behind the magnet 3 when fully closed. Other configurations are the same as or equivalent to those in the first embodiment.

The operation of the elevator door position detector according to the seventh embodiment will be described below. 16 and 1
As shown in 7, when the elevator car door 1 is fully closed,
The magnet 3 provided on the door hanger 2 above the elevator car door 1 and the magnetic proximity switch 6 provided on the lateral surface of the door hanger case 5 behind the magnet 3 are closest to each other. Therefore, as shown in FIG. 3 described above, a magnetic path is formed inside the magnetic proximity switch 6 by the magnetic force of the magnet 3, the contacts are in the ON state, and the magnetic proximity switch 6 has the elevator car door 1 fully closed. A signal indicating that is output.

Next time the elevator car door 1 opens,
Since the magnet 3 integrated with the elevator car door 1 moves leftward, the magnet 3 and the magnetic proximity switch 6 are separated by a predetermined distance or more. Finally, the contacts of the magnetic proximity switch 6 are turned off, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is open.

In this way, if the magnetic proximity switch 6 is provided on the lateral side surface of the door hanger case 5, even if the door hanger 2 is tilted about the door rail 4, the magnet 3 is generated.
Since the gap between the magnetic proximity switch 6 and the magnetic proximity switch 6 does not fluctuate much, a stable operating position point of the door can be detected by the magnetic detection switch 6 and output. Further, since the magnetic proximity switch 6 is provided on the lateral side surface of the door hanger case 5, the height of the entire device can be reduced.

Embodiment 8. Next, an elevator door position detector according to the eighth embodiment will be described. 18 and 1
9 is a diagram showing a configuration of an elevator door position detector according to the eighth embodiment, and FIG. 18 is a front view of the elevator car door 1 in a fully closed state as seen from the landing side. FIG. 19 is a side view of the elevator car door 1 viewed from the side.
The eighth embodiment differs from the second embodiment shown in FIGS. 6 and 7 in that a magnetic proximity switch 6 is provided on the door hanger 2 above the elevator car door 1 and the magnetic proximity switch when the elevator car door 1 is fully closed. 6 is that the magnet 3 is provided on the side surface of the door hanger case 5 behind the door 6. Other configurations are the same as or equivalent to those in the second embodiment.

The operation of the elevator door position detector according to the eighth embodiment will be described below. 18 and 1
As shown in 9, when the elevator car door 1 is fully closed,
The magnetic proximity switch 6 provided on the door hanger 2 above the elevator car door 1 and the magnet 3 provided on the lateral side surface of the door hanger case 5 behind the magnetic proximity switch 6 are closest to each other. For this reason, a magnetic path is formed inside the magnetic proximity switch 6 by the magnetic force of the magnet 3, the contacts are turned on, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is fully closed.

Next, when the elevator car door 1 is opened,
Since the magnetic proximity switch 6 integrated with the elevator car door 1 moves to the left, the magnetic proximity switch 6 and the magnet 3 are separated by a predetermined distance or more. Finally, the contacts of the magnetic proximity switch 6 are turned off, and the magnetic proximity switch 6 outputs a signal indicating that the elevator car door 1 is open.

If the magnetic proximity switch 6 is provided above the door hanger 2 and the magnet 3 is provided on the lateral side surface of the door hanger case 5 as described above, even if the door hanger 2 is tilted about the door rail 4, the magnet 3 is provided. Since the gap between the magnetic proximity switch 6 and the magnetic proximity switch 6 does not change so much, a stable operating position point of the door can be detected by the magnetic proximity switch 6 and output. Further, since the magnet 3 is provided on the lateral side surface of the door hanger case 5, the height of the entire device can be reduced.

The present invention is not limited to the above-mentioned embodiment, but may be modified as follows, for example, within a range not departing from the gist of the present invention. (1) In each of the embodiments, a single-opening type door is used as the elevator car door 1, but a double-opening type door may be used. (2) In the seventh and eighth embodiments, the fully closed state of the elevator car door 1 is detected using the pair of magnets 3 and the magnetic proximity switch 6, but the second magnet or the second magnetic proximity switch is used. With elevator car door 1
The fully open state of may be detected.

[0051]

Since the present invention is constructed as described above, it has the following effects.

Unlike the conventional elevator door position detector using a mechanical control switch, the elevator door position detector of the present invention uses a magnetic proximity switch having no mechanical contact portion. Parts replacement,
Almost no maintenance such as adjustment of operating position, cleaning, lubrication is required. Also, since there is no mechanical contact, the operating position can be set accurately and there is no malfunction.
It is possible to obtain a stable position point with almost no change over time in the operating position point.

Further, conventionally, a shield operation type optical proximity switch and a shield operation type magnetic proximity switch have been used, but both of them have a problem that a shield plate is required and the position detector body becomes large. Since the elevator door position detector of the present invention uses a magnetic proximity switch,
These shield plates are not required and can be miniaturized.

[Brief description of drawings]

FIG. 1 is a diagram showing a front of an elevator car door to which an elevator door position detector according to a first embodiment is applied.

FIG. 2 is a view showing a side surface of an elevator car door to which the elevator door position detector according to the first embodiment is applied.

FIG. 3 is a diagram showing a relationship between a magnetic proximity switch and a magnet.

FIG. 4 is a diagram showing a relationship between a gap between a magnetic proximity switch and a magnet and an operating position point of the switch.

FIG. 5 is a diagram showing a relationship of a variation amount between a magnetic proximity switch and a magnet gap, and an operating position point of the switch.

FIG. 6 is a diagram showing the front of an elevator car door to which the position detector for an elevator door according to the second embodiment is applied.

FIG. 7 is a diagram showing a side surface of an elevator car door to which an elevator door position detector according to a second embodiment is applied.

FIG. 8 is a diagram showing the front of an elevator car door to which an elevator door position detector according to a third embodiment is applied.

FIG. 9 is a diagram showing the front of an elevator car door to which an elevator door position detector according to a third embodiment is applied.

FIG. 10 is a diagram showing a front of an elevator car door to which an elevator door position detector according to a fourth embodiment is applied.

FIG. 11 is a diagram showing a front of an elevator car door to which an elevator door position detector according to a fourth embodiment is applied.

FIG. 12 is a diagram showing a front of an elevator car door to which an elevator door position detector according to a fifth embodiment is applied.

FIG. 13 is a diagram showing the front of an elevator car door to which an elevator door position detector according to a fifth embodiment is applied.

FIG. 14 is a diagram showing a front of an elevator car door to which an elevator door position detector according to a sixth embodiment is applied.

FIG. 15 is a diagram showing a front of an elevator car door to which an elevator door position detector according to a sixth embodiment is applied.

FIG. 16 is a diagram showing the front of an elevator car door to which the position detector for an elevator door according to the seventh embodiment is applied.

FIG. 17 is a diagram showing the front of an elevator car door to which the elevator door position detector according to the seventh embodiment is applied.

FIG. 18 is a diagram showing the front of an elevator car door to which the position detector for an elevator door according to the eighth embodiment is applied.

FIG. 19 is a diagram showing a side surface of an elevator car door to which an elevator door position detector according to an eighth embodiment is applied.

[Explanation of symbols]

1 car door, 2 door hanger, 3 magnet, 4 door rail, 5 door hanger case, 6 magnetic proximity switch, 7 second magnetic proximity switch, 8 second magnet.

Claims (4)

[Claims] 1. A position detector for an elevator door, comprising: a magnet provided on a door hanger above the elevator door; and a magnetic proximity switch provided near the magnet when the elevator door is fully closed. 2. A position detection for an elevator door, comprising: a magnetic proximity switch provided on a door hanger above the elevator door; and a magnet provided near the magnetic proximity switch when the elevator door is fully closed. vessel. 3. The position detector for an elevator door according to claim 1, further comprising a second magnetic proximity switch provided near the magnet when the elevator door is fully opened. 4. The position detector for an elevator door according to claim 1, further comprising a second magnet provided near the magnetic proximity switch when the elevator door is fully opened.