JPH08239183A - Elevator door position detector - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to easily adjust the angle of the detection plate with respect to the rotating shaft and to easily attach the detecting plate to the rotating shaft. [Structure] A hole 31 is inserted into a rotary shaft 22 that rotates in conjunction with the operation of a door drive mechanism that opens and closes a panel door,
Further, it has a detection plate 32 formed in a detection width determined by determining the angular range in which the proximity sensor is turned on and off, a through hole to be inserted into the rotary shaft 22, and a screw groove 33a on the outer peripheral surface on the insertion end side. A boss 33 having a groove formed therein and a lock nut 34 screwed into the thread groove constitute a door position detecting mechanism by a proximity sensor, and the lock nut 34, the hole 31 of the detecting plate 32, and the boss 33 are arranged in this order on the rotary shaft 22. Then, the boss 33 is first fixed to the rotary shaft 22 with the screw 35, and then the hole 3 of the detection plate 32 is attached to the end face side of the screw groove of the boss 33.
The peripheral surfaces of one part are brought into contact with each other, the lock nut 34 is screwed into the thread groove, and these are integrally tightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door position detecting device for detecting an elevator door position using a proximity switch.

[0002]

2. Description of the Related Art An elevator door position detecting device converts an opening / closing operation of a door into a rotation angle, detects an opening / closing position of the door from the rotation angle, and uses it for control of a door opening / closing drive section and operation control of an elevator. It was done.

Recently, as such an elevator door position detecting device, as shown in FIG. 4, a structure has been adopted in which a proximity sensor unitized in a door driving mechanism is incorporated to detect the door position.

In FIG. 4, reference numeral 1 denotes a door panel on the side of the elevator car to be detected, which is a hanger 5 suspended from a rail 4 mounted on a top of a car frame 2 via a header case 3. Is mounted, and the roller 6 of the hanger 5 rolls along the rail 4 so that the door panel 1 can be opened.

Reference numeral 7 denotes a door drive mechanism mounted on the upper surface of the elevator car. This door drive mechanism 7 is connected to an output shaft 8 of a motor (not shown) via a belt 9 as shown in FIG. A first sprocket 10, a second sprocket 12 having a large diameter connected to the first sprocket 10 via a chain 11, and a third sprocket 14 connected to the second sprocket 12 via a chain 13. And a proximity sensor unit 15 that responds to the rotation transmitted to the third sprocket 14.

On the second sprocket 12, a pair of levers 16 symmetrically provided about the shaft thereof are provided on a shaft 17.
Respectively, one end of a rod 18 is rotatably attached to each of these shafts 17, and the rod 1
One end of a long link 19 is rotatably attached to the other end of 8, and the other end of the link 19 is rotatably supported by the door panel 1 via a small link 20. In this case, the link 19 is located at an appropriate position in the longitudinal direction of the car frame 2.
It is rotatably supported by a shaft 21 on the upper part of the.

Therefore, in the door drive mechanism having such a structure, when the first sprocket 10 is rotated in the direction of the arrow shown in the drawing by the motor (not shown), this rotation is transmitted to the second sprocket 12 via the chain 11 and in the direction of the arrow shown in the drawing. Turn to.

Then, the rotation of the second sprocket 12 is transmitted to the link 19 via the rod 18, and the link 19 rotates about the shaft 21 in the direction of the arrow shown in the drawing, whereby the door panel 1 opens. Move to.

Further, by rotating the motor in this state in the opposite direction to the above, the door panel 1 is moved in the closing direction. By the way, as a conventional proximity sensor unit 15 for detecting the opening / closing position of the door panel 1, as shown in FIG.
A structure as shown in (a) to (c) is adopted. That is, in FIGS. 6A to 6C, a rotary shaft 22 is rotatably supported by the support frame 23, and the rotation of the above-described second sprocket is transmitted through the chain. A plurality of cylindrical bosses 25 each having the detection plate 24 attached to the flange surface 25a are sequentially inserted so as to be juxtaposed in the axial direction, and fixed by screws.

Further, as shown in FIG. 7, for example, a magnetic type proximity sensor 26 is provided on the support member 2 in correspondence with the rotation locus of the detection plate 24 attached to the flange surface 25a of each boss 25.
It is attached to each 7.

In this case, the detection plate 24 attached to the flange surface of each boss 25 is, as shown in FIG.
The angle range in which the proximity sensor 26 is turned on and off is determined according to the position of, and the width Y of the detection plate 24 is determined accordingly as shown in FIG. As the detection plate 24, a plurality of types having different widths are prepared, and the detection plates 24 are selectively used according to the required detection width.

The proximity sensor unit 15 having such a configuration
In order to open the panel door 1 in the fully closed state, when the door drive mechanism 7 is operated, the panel door 1 is opened as described above. At this time, the rotation of the second sprocket 12 is performed via the chain 13. It is transmitted to the third sprocket 14, and the rotary shaft 22 is rotated by the third sprocket 14.

Here, in FIG. 6A, each detection plate 2
4 in order from the third sprocket 14 side to 24a, 24
b, 24c, and 24d, and the proximity sensor 26 is also 26a, 26b, 26c, and 26d, the first proximity sensor 26 is first detected by the detection plate 24a as shown in FIG.
a is turned on, and then the detection plate 24b turns on the second proximity sensor 26b. Then, as the opening of the panel door 1 progresses, the detection plate 24c turns on the third proximity sensor 26c, and finally the detection plate 24d turns on the proximity sensor 26d.

In this case, the first proximity sensor 26a is in the ON state in the angular range corresponding to the door position from 0 ° to 45 °, and the second proximity sensor 26b is in the angular range of 14 °.
The third proximity sensor 26c is turned on in the angular range of 87 ° to 120 °, and the fourth proximity sensor 26d is set in the angular range of 117 °.
It is in the ON state from ° to 120 °.

Therefore, each of these proximity sensors 26a-26
By using the output signal of d for the speed control of the motor for driving the panel door, it is possible to smoothly control the opening and closing of the panel door. The other detection plate and the proximity sensor inserted in the rotary shaft 22 are used for operation control such as elevator balance current control and brake control.

[0016]

However, in such an elevator door position detecting device, the detecting plate 24 for determining the angular region corresponding to the door position is fixed to the flange surface 25a of the boss 25 by screwing. Therefore, when adjusting the angle of the detection plate 24 with respect to the rotation shaft 22, a screw hole for screwing the boss 25 to the rotation shaft 22 is located on the base side of the support frame 23 depending on the rotation angle of the rotation shaft 22, It is difficult to tighten the screw that fixes the boss 25 to the rotating shaft 22.

Further, since the width of the detection plate that determines the angle region varies depending on the width of the door entrance and exit and the model of the elevator, it is necessary to prepare a large number of detection plates having different widths. The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to easily adjust the angle of the detection plate with respect to the rotating shaft and to easily attach the detecting plate to the rotating shaft. It is to provide a position detection device.

Another object of the present invention is to provide an elevator door position detecting device capable of appropriately adjusting the detection width of the detection plate for determining the angle area without preparing different types of detection plates. To do.

[0019]

In order to achieve the above object, the present invention constitutes an elevator door position detecting device by the following means. The invention corresponding to claim 1 is a plurality of rotary shafts that rotate in conjunction with a door driving mechanism that drives an elevator door to open and close, and a detection width is determined from an angular range in which a proximity sensor is turned on and off according to a door position. Is inserted in the rotary shaft in an elevator door position detecting device configured to axially attach a detection plate to constitute a door position detecting mechanism and detect each door position based on an output signal of each proximity sensor. A boss having a through hole and a thread groove formed on the outer peripheral surface on the insertion end side, and a hole to be inserted into the rotating shaft, and a detection width determined from an angular range in which the proximity sensor is turned on and off A detection plate formed on the detection plate, and a lock nut for fixing the detection plate.The boss is fixed to the rotating shaft with a screw, and the peripheral surface of the hole portion of the detection plate is attached to the end face side of the screw groove of the boss. Contact the locker Tighten them integrally with the door screwed into the screw groove of the boss.

The invention corresponding to claim 2 is the above claim 1.
In the invention corresponding to, a plurality of detection plates are inserted through the rotary shaft at the end surface side of the thread groove of the boss at appropriate angles so that the detection width can be adjusted, and these are integrally tightened by a lock nut. According to a third aspect of the invention, in the invention according to the third aspect, a marking line for adjustment is provided in the detection width portion of the detection plate.

[0021]

In the elevator door position detecting device having the above-mentioned structure, the detecting plate having the hole inserted into the rotary shaft is used to fix the position to the screw portion formed on the boss by the lock nut. The boss can be fixed regardless of the angle of the rotation axis, and the detection plate can be adjusted without using a special tool.

Further, by providing a plurality of detection plates that are overlapped with each other at an appropriate angle, it is possible to absorb the difference in the detection width depending on the door type and model. Further, by providing a marking line on the detection plate, adjustment can be easily performed even when the entrance / exit specifications are different.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B show the structure of a door position detecting mechanism using a proximity sensor in a first embodiment of an elevator door position detecting device according to the present invention. FIG. 1A is a front view, FIG. 1B is a side view, and FIG. It is a rear view.

In this embodiment, as shown in FIG. 1, there is a hole 31 inserted in the rotary shaft 22 which rotates in conjunction with the operation of the door drive mechanism for opening and closing the panel door, and the proximity sensor is turned on and off. A detection plate 32 having a detection width determined by the determination of the angular range to be formed, a boss 33 having a through hole to be inserted into the rotary shaft 22 and having a thread groove 33a formed on the outer peripheral surface on the insertion end side, The lock nut 34 screwed into the thread groove 33a constitutes a position detecting mechanism by a proximity sensor.

In the position detecting mechanism using the proximity sensor having such a structure, as shown in FIG. 2, the lock nut 34, the hole 31 of the detecting plate 32 and the boss 33 are inserted in this order into the rotating shaft 22, and then the boss is first inserted. 33 is fixed to the rotary shaft 22 with a screw 35, and then the peripheral surface of the hole 31 of the detection plate 32 is brought into contact with the end surface side of the thread groove of the boss 33 to lock the nut 3
4 is screwed into the thread groove to integrally tighten them.

Therefore, in the position detecting section by the proximity sensor having such a structure, the mounting angle of the detecting plate 32 mounted on the rotary shaft 22 can be easily adjusted, and the lock nut can be used without using a special tool. The detection plate 32 can be easily fixed to the boss 33 only by screwing 34 into the thread groove of the boss 33.

When the boss 33 is fixed to the rotary shaft 22 by screwing, it is not necessary to consider the adjustment of the mounting angle of the detection plate 32. Therefore, the boss 32 is screwed from the position where the boss 32 is easily fixed to the rotary shaft 32. It can be fixed by 35.

3A and 3B show the construction of a position detecting portion using a proximity sensor in a second embodiment of the elevator door position detecting apparatus according to the present invention, wherein FIG. 3A is a front view and FIG. 3B is a side view. The same parts as 1 are designated by the same reference numerals and the description thereof will be omitted, and only different points will be described here.

In this embodiment, as shown in FIG.
The detection width portions of the two detection plates 32a and 32b are overlapped with the detection width portions of the two detection plates 32a and 32b at appropriate angles, and the peripheral surfaces of the holes 31 are brought into contact with each other, and the lock nut 34 is screwed into the screw groove to integrate them. It is designed to be fastened. In this case, the detection width can be arbitrarily changed by adjusting the weighting angle of the detection width portions of the two detection plates 32a and 32b.

Therefore, if the position detecting section using the proximity sensor having such a structure is used, the same effects as those of the first embodiment described above can be obtained. Since it can be absorbed, it can be dealt with without preparing detection plates having various detection widths.

Further, marking lines 36 indicating the adjustment width are provided in advance on the detection plates 32a and 32b, and an adjustment pitch is provided between the marking lines to detect the door position even for panel doors having different entrance / exit specifications. The width can be easily adjusted.

[0032]

As described above, according to the present invention, the angle of the detecting plate with respect to the rotary shaft can be easily adjusted, and the detecting plate can be easily attached to the rotary shaft.
Further, it is possible to provide an elevator door position detection device capable of appropriately adjusting the detection width of the detection plate that determines the angular region without preparing different types of detection plates.

[Brief description of drawings]

1A and 1B show a configuration of a door position detection mechanism using a proximity sensor in a first embodiment of an elevator door position detection device according to the present invention, where FIG. 1A is a front view, FIG. 1B is a side view, and FIG. Is the rear view.

FIG. 2 is an exploded perspective view for explaining assembly of the detection mechanism.

3A and 3B show a configuration of a door position detection mechanism using a proximity sensor according to a second embodiment of the present invention, where FIG. 3A is a front view and FIG. 3B is a side view.

FIG. 4 is a front view for explaining an elevator door drive mechanism and a door position detection device.

FIG. 5 is a front view showing the elevator door drive mechanism in detail.

FIG. 6 shows a configuration of a conventional door position detecting device,
(A) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 7 is a configuration diagram showing the relationship between the detection plate and the proximity sensor.

FIG. 8 is an explanatory view of the detection width of the detection plate.

FIG. 9 is a time chart for explaining the operation of the proximity switch by the position detection mechanism.

[Explanation of symbols]

1 ... Door panel, 2 ... Car ... Frame, 3 ... Header case, 4 ... Rail, 5 ... Hanger, 6 ... Roll, 7 ... Door drive mechanism, 8 ... Output shaft, 9 ... Belt 10 ... First sprocket, 11, 13 ... Chain, 12 ... Second sprocket, 14 ... Third sprocket, 15 ... Proximity sensor unit, 16 ... Lever, 17, 21 ... Shaft , 18 ... Rod, 19 ... Link, 20 ... Small link, 22 ... Rotation axis, 31 ...
Hole, 32 ... Detection plate, 33 ... Boss, 33a ... Thread groove, 34 ... Lock nut.

Front Page Continuation (72) Inventor Yasushi Takagusa 1st Toshiba Town, Fuchu City, Tokyo Inside the Fuchu Factory, Toshiba Corporation

Claims (3)

[Claims] 1. A plurality of detection plates, each having a detection width defined from an angular range in which a proximity sensor is turned on and off according to a door position, are provided on a rotary shaft that rotates in conjunction with a door driving mechanism that drives an elevator door to open and close. An elevator door position detection device configured to axially attach to constitute a door position detection mechanism and detect each door position based on an output signal of each proximity sensor, having a through hole to be inserted into the rotary shaft. And has a boss having a thread groove formed on the outer peripheral surface on the insertion end side and a hole to be inserted into the rotary shaft, and has a detection width defined by an angular range in which the proximity sensor is turned on and off. Elevator door position comprising a detection plate, a lock nut screwed into the screw groove, and fixedly fixed to the boss by tightening the detection plate, and a screw fixing the boss to a rotating shaft. Detection device. 2. A plurality of detection plates are inserted into the end surface side of the thread groove of the boss through the rotating shaft so that the detection width can be adjusted at an appropriate angle, and these are integrally tightened by a lock nut. The elevator door position detecting device according to claim 1. 3. The elevator door position detecting device according to claim 2, wherein a scribe line for adjustment is provided in the detection width portion of the detection plate.