JP2003238038A - Car position detecting device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a car position detecting means of an elevator having high position detection accuracy of a car even under the direct sunlight and a long service life. <P>SOLUTION: This car position detecting device is provided with a position detecting switch 7 provided in either one of an elevator shaft 2 or a car 9 and formed with a light emitting part 5a and a light receiving part 6a receiving light from the light emitting part 5a opposing each other, a non-transparent long cylindrical member 8b projectingly provided from the periphery of the light receiving part 6a on the light emitting part 5a side, and a shielding member 10 provided on the other one of the elevator shaft 2 or the car 9 passing between the light emitting part 5a and the light receiving part 6a of the position detecting switch 7 according to elevation of the car 9 for shielding the light from the light emitting part 5a. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when stopping a car at a destination floor, decelerates or stops the car according to the distance between the position of the car in the hoistway and the stop position at the destination floor. The present invention relates to an elevator car position detection device for detecting the position of a car in a hoistway.

[0002]

2. Description of the Related Art In an elevator, when a car is stopped at a destination floor, the car is decelerated and stopped according to the distance between the position of the car in the hoistway and the stop position at the destination floor. There is. Such an elevator is provided with a car position detecting device as shown in FIGS. 16 and 17, for example, in order to detect the position of the car in the hoistway.

As shown in FIGS. 16 and 17, a car position detecting device 100 includes a plurality of position detecting switches 104 vertically mounted on a guide rail 102 installed in a hoistway 101 via brackets 103, and It is formed by a shield plate 106 attached to the outer wall surface of the car 105.

As shown in FIG. 17, the position detecting switch 104 is formed in a concave shape and has protruding pieces 104a on both sides,
The light emitting element 107 and the light receiving element 108 are arranged to face each other at 104b. This position detection switch 104
The light emitting element 107 constantly emits light, and the light receiving element 108 receives and detects the light from the light emitting element 107. As shown in FIG. 16, the position detection switch 104 is connected to the control panel 110 via the wiring 109, and when the amount of light detected by the light receiving element 108 becomes lower than a predetermined reference amount set in advance, A detection signal is output to the control panel 110.

On the other hand, the shield plate 106 is shown in FIGS.
As shown in FIG. 7, the two protruding pieces 104 of the position detection switch 104 are arranged at positions corresponding to the position detection switch 104, and depending on the elevation of the car 105 in the hoistway 101.
It passes between a and 104b. As shown in FIG. 17, the shield plate 106 has a position detection switch 1
When passing between both projecting pieces 104a and 104b of No. 04, it is arranged between the light emitting element 107 and the light receiving element 108, and blocks the light from the light emitting element 107 to the light receiving element 108.

In such a cage position detecting device 100,
When the light from the light emitting element 107 to the light receiving element 108 is blocked by the shield plate 106 according to the elevation of the car 105, the light detection amount in the light receiving element 108 becomes lower than a predetermined reference amount, and the position detection switch 104 outputs a detection signal to the control panel 110. Then, in the elevator, the position of the car 105 in the hoistway 101 is detected by the detection signal from the position detection switch 104, and the car 1
A control signal is output from the control panel 110 according to the distance between the position 05 and the stop position on the destination floor, and the car 105
Deceleration and stop are performed.

[0007]

By the way, when the conventional car position detecting device 100 is used in direct sunlight, such as a view elevator or an outdoor elevator, the light receiving element 108 from the light emitting element 107 is used. Even if the light to the light is blocked by the shield plate 106, the light detection amount of the light receiving element 108 may not become lower than the reference amount because the light receiving element 108 receives the direct sunlight. In this way, when the amount of light detected by the light receiving element 108 does not become lower than the reference amount, the position detection switch 104 causes the light emitting element 107
The light from the light source to the light receiving element 108 is in the same state as when it is not blocked by the shielding plate 106. That is, in the car position detection device 100, the position detection switch 1
There is a problem that the detection signal is not output from 04 to the control panel 110, and the position of the car 105 in the hoistway 101 is not detected.

Therefore, the car position detecting device 100 cannot be used under direct sunlight, and the car position detecting device using electromagnetic induction is used. However, the car position detecting device using electromagnetic induction is generally used for the car. Compared with the position detection device 100, there are problems that the position detection accuracy of the car is low and the life is short.

Therefore, the present invention has been made in consideration of the above-mentioned conventional problems, and an object thereof is to provide a car position detecting device for an elevator which has a high position detecting accuracy of a car even under direct sunlight and has a long life. And

[0010]

To achieve the above object, the present invention provides a light emitting portion and a light receiving portion for receiving light from the light emitting portion, the light emitting portion being provided at either a predetermined position in a hoistway or a car. And a position detection switch formed to face each other, a light-impermeable tubular member protruding from the periphery of the light receiving portion to the light emitting portion side, and provided on the other of the hoistway or the car, It is characterized by comprising a shield member which passes between the light emitting portion and the light receiving portion of the position detection switch in accordance with the elevation of the car and shuts off the light from the light emitting portion.

According to the present invention having such a configuration, since the light-transmissive elongated tubular member projects from the periphery of the light-receiving portion toward the light-emitting portion, the light-receiving portion other than the light from the light-emitting portion is projected. It is possible to block the light traveling toward the side by the tubular member, and it is possible to prevent the light receiving unit from receiving the direct sunlight even when the light receiving section is used in the direct sunlight, such as an elevator for a view or an outdoor elevator.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The details of the elevator car position detecting device according to the present invention will be described below with reference to the embodiments shown in the drawings.

(First Embodiment) FIG. 1 is a plan view showing a first embodiment of an elevator car position detecting apparatus according to the present invention, and FIG. 2 is an enlarged plan view of the car position detecting apparatus shown in FIG. is there.

The car position detecting device 1 of this embodiment is shown in FIG.
Further, as shown in FIG. 2, a plurality of light emitting units 5a and light receiving units 6a that receive light from the light emitting units 5a face each other and are vertically attached to the guide rails 3 installed in the hoistway 2 via brackets 4. Position detection switch 7 formed by
From the periphery of the light emitting portion 5a and the light receiving portion 6a.
Member 8 projecting from the light emitting portion 5a side and the light emitting portion 5a side
a and 8b, and a shield plate 10 as a shield member attached to the outer wall surface of the car 9.

As shown in FIG. 2, the position detection switch 7 is formed in a concave shape and has protruding pieces 11a and 11b on both sides.
The light emitting element 5 and the light receiving element 6 are embedded in the facing surfaces 12a and 12b so as to face each other. In this position detection switch 7, the light emitting portion 5a is formed by exposing a part of the light emitting element 5 from the facing surface 12a, and the light receiving portion 6a is opened by exposing a part of the light receiving element 6 from the facing surface 12b. Has been formed. Further, the position detection switch 7 includes the light emitting unit 5
Light is always emitted from a, and the light from the light emitting portion 5a is received and detected by the light receiving portion 6a. Then, as shown in FIG. 1, the position detection switch 7 is connected to the control panel 14 via the wiring 13, and when the light detection amount by the light receiving unit 6a becomes lower than a predetermined reference amount set in advance, A detection signal is output to the control panel 14.

As shown in FIG. 2, the above-mentioned tubular members 8a and 8b are made of a light-impermeable synthetic resin or metal, which prevents light from entering from the outer peripheral wall to the inner side. It has a long cylindrical shape. In addition, the tubular members 8a and 8b
Is formed so that the inner peripheral surface does not reflect light. As shown in FIGS. 1 and 2, these tubular members 8a and 8b respectively face the light-emitting portion 5a and the light-receiving portion 6a so as to surround the circumferences of the light-emitting portion 5a and the light-receiving portion 6a, respectively, and the facing surfaces 12a and 12b of the projecting pieces 11a and 11b. From the light receiving portion 6a side and the light emitting portion 5
The protrusion a is provided on the a side and has a gap between the ends that is larger than the thickness of the shielding plate 10 described later. The longitudinal direction of each of the tubular members 8a and 8b is along the directing direction of the light from the light emitting unit 5a to the light receiving unit 6a, and the light from the light emitting unit 5a is received through the gap between the inside and the tip. It is possible to reach 6a.

The shield plate 10 is arranged at a position corresponding to the position detection switch 7, and both projecting pieces 11a and 11b of the position detection switch 7 are moved according to the elevation of the car 9 in the hoistway 2.
It is designed to pass through. As shown in FIG. 2, the shield plate 10 includes both protruding pieces 11 of the position detection switch 7.
When passing between a and 11b, it is arranged between the tips of the tubular members 8a and 8b to block light from the light emitting section 5a to the light receiving section 6a.

In the car position detecting device 1 as described above, when the light from the light emitting part 5a to the light receiving part 6a is blocked by the shielding plate 10 in response to the raising and lowering of the car 9, the light detection amount at the light receiving part 6a is detected. Becomes lower than a predetermined reference amount, and the position detection switch 7 outputs a detection signal to the control panel 14.

In the elevator, the position of the car 9 in the hoistway 2 is detected by the detection signal from the position detection switch 7, and the control is performed according to the distance between the car 9 and the stop position on the destination floor. A control signal is output from the panel 14, and the car 9 is decelerated and stopped.

In the car position detecting device 1 of this embodiment, a cylindrical member 8b having a long cylindrical shape extending from the facing surface 12b of the projecting piece 11b of the position detecting switch 7 to the light emitting part 5a side so as to surround the light receiving part 6a. Since the light receiving portion 6a is projectingly provided, the light receiving portion 6a is exposed to the outside only through the tip opening of the tubular member 8b, and it is possible to block the light traveling to the light receiving portion 6a from other than the tip opening, and the tubular member 8b It is possible to prevent most of the light entering from the tip opening from reaching the light receiving portion 6a. That is, in the car position detecting device 1, the light other than the light from the light emitting unit 5a and traveling toward the light receiving unit 6a can be blocked by the tubular member 8b.

As a result, in the car position detecting device 1, the light receiving section 6a can be prevented from receiving the direct sunlight even when it is used in the direct sunlight such as the elevator for the view and the elevator for the outdoor, and the light emitting portion can be prevented. When the light from 5a to the light receiving portion 6a is blocked by the shield plate 10, the amount of light detected by the light receiving portion 6a is certainly lower than the reference amount, and the boarding in the hoistway 2 without malfunction occurs. The position of the car 9 can be reliably detected. As a result, it is possible to realize a car position detection device that has a high position detection accuracy of the car 9 even under direct sunlight and has a long life.

Further, in the car position detecting device 1, the light emitting section 5
Also on the a side, from the facing surface 12a of the projecting piece 11a of the position detection switch 7 to the light receiving portion 6a so as to surround the light emitting portion 5a.
Since the long cylindrical tubular member 8a is provided on the side,
The directivity of the light emitted from the light emitting unit 5a can be improved, and the position detection accuracy of the car 9 can be improved.

In the elevator car position detecting device 1 of this embodiment, for example, as shown in FIG. 3, the duct 15 covering the wiring 13 connecting the position detecting switch 7 and the control panel 14 (not shown). May be provided. In this case, the wiring 13 can be prevented from deteriorating due to direct sunlight or wind and rain, and the car position detecting device 1 having high reliability can be realized.

Further, in the car position detecting device 1 of the present embodiment, for example, as shown in FIG. 4, a cover 16 is provided to cover the position detecting switch 7 and the tubular members 8a and 8b except the tip opening. Good. In this case, the position detection switch 7 can be prevented from deteriorating due to direct sunlight or wind and rain, and the car position detection device 1 with high reliability can be realized.

(Second Embodiment) A second embodiment of the elevator car position detecting device according to the present invention will be described below with reference to the drawings. The same components as those of the above embodiment and each of the following embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 5 is an enlarged plan view showing a second embodiment of the elevator car position detecting device according to the present invention,
FIG. 6 is a sectional view taken along the line aa of the tubular member provided in the car position detection device shown in FIG.

As shown in FIGS. 5 and 6, the cage position detecting device 17 of the present embodiment has tubular members 18a and 18b having a small diameter portion 19 having a small inner peripheral surface on the tip side. Is. As shown in FIG. 6, the small-diameter portion 19 has an inner peripheral surface formed to have a smaller diameter than the diameter of the inner peripheral surfaces of the tubular members 18a and 18b on the base end side.

In the car position detecting device 17 of this embodiment,
In addition to providing the same operation and effect as the first embodiment, since the tubular member 18a has the small diameter portion 19 whose inner peripheral surface is formed to have a small diameter with respect to the base end side,
The operating range of the position detection switch 7 can be reduced by thinning the light emitted from the light emitting section 5a to the light receiving section 6a. Therefore, in the car position detection device 17, the shield plate 1
It is possible to quickly shut off the light from the light emitting unit 5a to the light receiving unit 6a and release the blocking by 0, and the car 9
The position detection accuracy of can be improved.

Further, in the car position detecting device 17, since the small diameter portion 19 is also formed at the tip of the tubular member 18b,
It is possible to further improve the position detection accuracy of the car 9 by limiting the light that enters the inside from the tip end opening of the tubular member 18b.

(Third Embodiment) Hereinafter, a third embodiment of the elevator car position detecting device according to the present invention will be described with reference to the drawings. 7 is an enlarged plan view showing a car position detecting device for an elevator according to the present invention, and FIG. 8 is a front view of a position detecting switch provided in the car position detecting device shown in FIG. 9 is a cross-sectional view of a tubular member provided in the car position detecting device shown in FIG.
It is a line sectional view.

As shown in FIGS. 7 to 9, the car position detecting device 20 of the present embodiment has a large diameter in which the cylindrical members 21a and 21b are provided on the base end side and the inner peripheral surface is formed to have a large diameter. Part 22
And a through hole 23 penetrating to the outside of the large diameter portion 22.
Is provided. The large diameter portion 22 is formed in a mortar shape in which the inner peripheral surface is inclined so that the diameter gradually increases from the distal end side toward the proximal end side. As shown in FIGS. 8 and 9, the large-diameter portion 22 has an outer peripheral wall 22a arranged on the lower side,
The base ends are formed along the longitudinal direction of the tubular members 21a and 21b. The large diameter portion 22 is provided with a through hole 23 at the base end of the outer peripheral wall 22a arranged on the lower side thereof. The through hole 23 is formed by penetrating the outer peripheral wall 22a from the inner peripheral surface to the outer peripheral surface, and the cylindrical member 21a,
21b communicates with the inside and the outside.

In the car position detecting device 20 of this embodiment,
In addition to being able to achieve the same actions and effects as those of the first embodiment described above, when adopted in an outdoor elevator, water easily enters the inside of the tubular members 21a, 21b through the tip opening, Even if moisture enters the inside of the members 21a and 21b, the moisture flows toward the base end side due to the inclination of the inner peripheral surface of the large diameter portion 22, and is discharged to the outside from the through hole 23 at the base end.

Therefore, in the car position detecting device 20, a problem due to the water staying in the tubular members 21a, 21b, that is, the water staying in the tubular members 21a, 21b refracts the light from the light emitting section 5a. Therefore, it is possible to prevent a problem such as not reaching the light receiving portion 6a, and it is possible to reliably detect the position of the car 9 in the hoistway 2 without causing a malfunction. As a result, when adopted in an outdoor elevator, it is possible to more reliably realize the car position detection device 20 with high position detection accuracy of the car 9.

Further, in the car position detecting device 20, since the through hole 23 is formed in the outer peripheral wall 22a arranged on the lower side, it is possible to prevent the problem that water enters through the through hole 23. .

In this embodiment, the large-diameter portion 22 is formed in a mortar shape that bulges in the entire circumferential direction of the tubular members 21a and 21b. However, for example, only the lower side of the tubular member bulges. You may form so that it may be formed.

(Fourth Embodiment) Hereinafter, a fourth embodiment of the elevator car position detecting device according to the present invention will be described with reference to the drawings. FIG. 10 is an enlarged plan view showing a fourth embodiment of the elevator car position detecting device according to the present invention, and FIG. 11 shows the position detecting switch provided in the car position detecting device shown in FIG. 12 is a sectional view taken along the line cc of the tubular member provided in the car position detecting device shown in FIG.

As shown in FIGS. 10 to 12, the elevator car position detecting device 24 of the present embodiment has a tubular member 2
5a and 25b have the tip openings sealed by a light-transmissive sealing member 26. Cylindrical members 25a, 25b
As shown in FIGS. 11 and 12, a through hole 28 is formed in the outer peripheral wall 27 arranged below the base end side with respect to the tip end. The through hole 28 is formed by penetrating the outer peripheral wall 27 from the inner peripheral surface to the outer peripheral surface, and the cylindrical member 25.
The inside and outside of a and 25b are connected.

On the other hand, the sealing member 26 is shown in FIGS.
As shown in (1), it is made of a synthetic resin having a light-transmitting property and is formed in a cylindrical shape. This sealing member 26 is
The tubular members 25a and 25b are fixed to the respective tips, and the tip openings of the tubular members 25a and 25b are closed. As a result, the sealing member 26 seals the tubular members 25a and 25b. Further, the sealing member 26 has an outer surface 26a and an outer surface 26 arranged outside the tips of the tubular members 25a and 25b.
An antifouling coating is applied to b to prevent the adhesion of dirt.

In the elevator car position detecting device 24 of this embodiment, the same actions and effects as those of the first embodiment can be obtained, and in addition, the tubular members 25a, 25 are provided.
Since b is sealed by closing the tip opening with the sealing member 26, it is possible to prevent water from entering the inside of the tubular members 25a and 25b. Therefore, also in the car position detecting device 24, as in the third embodiment, a defect due to water remaining in the tubular members 25a, 25b, that is, water remaining in the tubular members 25a, 25b causes the light emitting unit 5a. It is possible to prevent a problem that light from the vehicle refracts and does not reach the light receiving portion 6a, and to reliably detect the position of the car 9 in the hoistway 2 (not shown) without causing a malfunction. You can As a result, when adopted in an outdoor elevator, it is possible to more reliably realize the car position detection device 24 with high position detection accuracy of the car 9.

Further, in the car position detecting device 24, since the tubular members 25a and 25b are sealed by the sealing member 26, the inside of the tubular members 25a and 25b is likely to be condensed and the sealing member 26 is easily fogged, but the tubular member 25a. , 25b are provided with through holes 28 that communicate the inside and the outside, so that the tubular members 25a, 2b
Problems such as dew condensation on the inside of 5b and fogging of the sealing member 26 can be prevented.

Further, in the car position detecting device 24, since the through hole 28 is formed in the outer peripheral wall 27 arranged on the lower side, it is possible to surely prevent a defect such as water from entering through the through hole 28. be able to.

Further, the sealing member 26 is the tubular member 25.
Since the anti-fouling coating is applied to the outer surface 26b arranged outside the tips of the a and 25b, it is possible to prevent the problem that the light from the light emitting section 5a is blocked due to the adhesion of dirt.

(Fifth Embodiment) A fifth embodiment of the elevator car position detecting apparatus according to the present invention will be described below with reference to the drawings. 13 is an enlarged plan view showing a fifth embodiment of the elevator car position detecting device according to the present invention, and FIG. 14 shows the position detecting switch provided in the car position detecting device shown in FIG. It is the front view seen.

As shown in FIGS. 13 and 14, the cage position detecting device 29 of the present embodiment has tubular members 30a, 30.
b is bent between the tip end and the base end, and a reflecting mirror 31 as a reflecting means for reflecting light is provided inside.
The light emitting section 5a and the light receiving section 6a are opposed to each other with the reflecting mirrors 31, 31 interposed therebetween.

As shown in FIG. 14, the position detecting switch 32 has a light emitting portion 5a and a light receiving portion 6a formed on the lower surfaces of the projecting pieces 11a and 11b on both sides, respectively, and these light emitting portion 5a and light receiving portion 6a are formed. From this, tubular members 30a and 30b are provided so as to protrude downward.

The tubular members 30a and 30b are bent at an intermediate portion between the tip end and the base end so that the tip end side and the base end side are substantially orthogonal to each other. These tubular members 30a and 30b are provided so as to project downward from the light emitting portion 5a and the light receiving portion 6a,
The tip openings face each other. In addition, the tubular member 30
Reflective mirrors 31 and 31 are arranged at the base end side and the tip end side of the a and 30b, respectively, at angles of approximately 45 °. As a result, the light emitting unit 5a and the light receiving unit 6a face each other via the reflecting mirrors 31, 31.

In the elevator car position detecting device 29 of the present embodiment, in addition to being able to achieve the same operation and effect as in the first embodiment, the tubular members 30a, 3 are provided.
0b is bent between the tip end and the base end and faces each other via the reflecting mirrors 31, 31 arranged inside the bent portions, so that the inside of the light entering from the tip opening of the tubular member 30b is Only the light along the tip side of the tubular member 30b is reflected by the reflecting mirror 31 at a substantially right angle and reaches the light receiving portion 6a. That is, in the car position detecting device 29, it is possible to more reliably block the light other than the light from the light emitting unit 5a and traveling toward the light receiving unit 6a.

As a result, in the car position detecting device 29, when it is used in direct sunlight, it is possible to more reliably prevent the light receiving portion 6a from receiving direct sunlight, and in the hoistway 2 without causing a malfunction. The position of the car 9 of the car can be detected more reliably, and the position detection accuracy of the car 9 can be further improved.

(Sixth Embodiment) A sixth embodiment of the elevator car position detecting apparatus according to the present invention will be described below with reference to the drawings. The same components as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 15 is an enlarged cross-sectional view showing a columnar member provided in the sixth embodiment of the elevator car position detecting device according to the present invention.

As shown in FIG. 15, the car position detecting device 33 of the present embodiment has a cylindrical member 8a, which is the same as that of the first embodiment.
Instead of 8b, a columnar member 34 protruding from the surface of the light receiving portion 6a (light emitting portion 5a) to the light emitting portion 5a side (light receiving portion 6a side).
a (columnar member 34b). Column member 3
4b (columnar member 34a) is made of a synthetic resin having a light-transmitting property, and is formed in a cylindrical shape. The columnar member 34b (columnar member 34a) has a light-impermeable layer 35 formed on its outer peripheral surface by a light-impermeable treatment such as painting or coating to prevent light from entering the interior from the outer peripheral surface. The columnar member 34b (columnar member 34a) is formed so that the inner peripheral surface does not reflect light.

The columnar members 34b (34a) are provided so as to project toward the light emitting portion 5a (light receiving portion 6a side) so as to cover the surface of the light receiving portion 6a (light emitting portion 5a).
The columnar member 34b (columnar member 34a) has a longitudinal direction that is along the directing direction of light from the light emitting unit 5a to the light receiving unit 6a, and the light emitting unit 5a is provided via a gap between the inside of the light impermeable layer 35 and the tip. The light from is able to reach the light receiving portion 6a.

Also in the elevator car position detecting device 33 of the present embodiment, the same operation and effect as those of the first embodiment can be obtained.

Although the embodiment of the elevator car position detecting device according to the present invention has been described above, the present invention is not limited to this, and various design changes can be made to the constituent elements. For example, in the above-described embodiment, the position detection switch 7 is attached to the guide rail 3 installed in the hoistway 2 and the shield plate 10 is attached to the outer wall surface of the car 9. However, on the contrary, the shield plate 10 is attached to the guide rail 3. Alternatively, the position detection switch 7 may be attached to the outer wall surface of the car 9.

In the above embodiment, the tubular members 8 and 1
8, 21, 26, 30 and the columnar member 34 are connected to the light emitting portion 5a.
The light receiving portion 6a is provided on both the side and the light receiving portion 6a.
It may be formed only on the side.

Further, the tubular members 8, 18, 21, 26 and 26 are
30 or the columnar member 34 has a dimension in the longitudinal direction that corresponds to the light emitting portion 5.
The size of a and the light receiving portion 6a may be changed according to the size. In this case, it is preferable that the cylindrical members 8, 18, 21, 21, 26, or the columnar member 34 be longer than the size of the light receiving portion 6a in a range that does not interfere with the shielding plate 10.

In the above embodiment, the tubular members 8 and 1 are
Although 8, 21, 26 and 30 are formed in a cylindrical shape and the columnar member 34 is formed in a cylindrical shape, for example, the cylindrical member is formed in a polygonal tube shape such as a quadrangle, and the columnar member is formed in a polygonal shape such as a quadrangular prism shape. It may be formed in a columnar shape.

In the above embodiment, light is used as the position detection switch, but ultrasonic waves may be used for position detection.

[0057]

As described above, according to the present invention, since a light-impervious elongated tubular member projects from the periphery of the light receiving portion toward the light emitting portion, Since it is possible to block the light that goes to the light receiving part other than the above by the tubular member, even if the light receiving part is used in direct sunlight, such as a view elevator or an outdoor elevator, the light receiving part can be protected from direct sunlight. Therefore, the position of the car in the hoistway can be reliably detected. As a result, it is possible to realize a car position detection device that has high accuracy in detecting the position of the car even under direct sunlight and has a long life.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of an elevator car position detecting device according to the present invention.

FIG. 2 is an enlarged plan view of the car position detecting device shown in FIG.

FIG. 3 is an enlarged plan view showing a modified example of the car position detecting device shown in FIG. 1.

FIG. 4 is an enlarged plan view showing another modified example of the car position detecting device shown in FIG. 1.

FIG. 5 is an enlarged plan view showing a second embodiment of the elevator car position detecting device according to the present invention.

6 is a sectional view taken along the line aa of a tubular member provided in the car position detection device shown in FIG.

FIG. 7 is an enlarged plan view showing a car position detecting device for an elevator according to the present invention.

8 is a front view of the position detection switch provided in the car position detection device shown in FIG. 7, as viewed in the direction of arrow A. FIG.

9 is a cross-sectional view taken along the line bb of a tubular member provided in the car position detection device shown in FIG.

FIG. 10 is an enlarged plan view showing a fourth embodiment of the elevator car position detecting device according to the present invention.

11 is a front view of the position detection switch provided in the car position detection device shown in FIG. 10 as seen from the direction of arrow B. FIG.

12 is a sectional view taken along line cc of the tubular member provided in the car position detection device shown in FIG.

FIG. 13 is an enlarged plan view showing a fifth embodiment of the elevator car position detecting device according to the present invention.

14 is a front view of the position detection switch provided in the car position detection device shown in FIG. 13 as seen from the direction of arrow C. FIG.

FIG. 15 is an enlarged cross-sectional view showing a columnar member provided in the sixth embodiment of the elevator car position detecting device according to the present invention.

FIG. 16 is a plan view showing a conventional car position detecting device for an elevator.

17 is an enlarged plan view of the conventional car position detecting device shown in FIG.

[Explanation of symbols]

1, 17, 20, 24, 29, 33 Car position detecting device 2 Hoistway 5a Light emitting part 6a Light receiving part 7,32 Position detecting switches 8a, 8b, 18a, 18b, 21a, 21b, 25
a, 25b, 30a, 30b tubular member 9 car 10 shielding plate (shielding member) 19 small diameter portion 22 large diameter portion 23 through hole 26 sealing member 28 through hole 31 reflecting mirror (reflecting means) 34a, 34b columnar member

Claims (9)

[Claims] 1. A position detection switch which is provided at either a predetermined position in a hoistway or a car, and which has a light emitting portion and a light receiving portion for receiving light from the light emitting portion facing each other, and the light receiving portion. Light-impermeable tubular member protruding from the periphery of the portion toward the light emitting portion and the light emitting portion and the light receiving portion of the position detection switch provided on the other side of the hoistway or the car. A car position detecting device for an elevator, comprising: a shielding member that passes according to the elevation of the car and shields the light from the light emitting unit. 2. The elevator car position detecting device according to claim 1, wherein the tubular member is provided so as to project from the periphery of the light emitting unit toward the light receiving unit. Detection device. 3. The elevator car position detecting device according to claim 1, wherein the tubular member has a small diameter portion whose inner peripheral surface is formed to have a small diameter on the front end side. Characteristic elevator car position detection device. 4. The elevator car position detecting device according to claim 1, wherein the tubular member is provided on a base end side and bulges at least downward. Thus, the elevator car position detecting device is provided with a large-diameter portion whose inner peripheral surface is gradually formed to have a large diameter, and a through hole penetrating to the outside under the large-diameter portion. 5. The elevator car position detecting device according to claim 1, wherein the tubular member has a light-transmitting sealing member at an opening on a tip side thereof. An elevator car position detection device characterized by being sealed by. 6. The elevator car position detection device according to claim 5, wherein the tubular member has a through hole that penetrates to the outside below the sealing member at the base end side. An elevator car position detection device characterized by the above. 7. The elevator car position detecting device according to claim 1, wherein the tubular member is bent between a tip end and a base end, and is internally formed. The elevator car position detecting device is characterized in that a reflecting means for reflecting light is provided, and the light emitting section and the light receiving section face each other via the reflecting means. 8. A position detection switch, which is provided on either the hoistway or a car and has a light emitting portion and a light receiving portion for receiving light from the light emitting portion facing each other, and a surface of the light receiving portion. A long columnar member that is provided on the side of the light emitting portion and has a light-transmitting property, and has an outer peripheral surface that has been subjected to a light-impermeable treatment, and is provided on the other of the hoistway or the car and detects the position. A car position detecting device for an elevator, comprising: a shielding member that passes between a light emitting portion and a light receiving portion of the switch in accordance with an elevation of a car and shields light from the light emitting portion. 9. The elevator car position detecting device according to claim 8, wherein the columnar member is provided so as to project from the surface of the light emitting portion toward the light receiving portion side. Position detection device.