JPH0748931Y2 - Ventilation window opening and closing device - Google Patents

Description

[Detailed Description of the Invention] [Outline] A device for opening / closing a ventilation window, particularly a device for opening / closing a ventilation window for a greenhouse such as a greenhouse for greenhouses or greenhouses, and a simple mechanism even when the drive shaft has two or more rotations. With the aim of providing an opening / closing device for the ventilation window that can detect the fully open / closed position of the ventilation window, reduce costs and facilitate adjustment during turning, it is driven by an electric motor that rotates in the normal and reverse directions. In the ventilation window opening / closing device that opens / closes the ventilation window via the opening / closing mechanism by the drive shaft and controls the rotation of the electric motor by the opening / closing position detection unit that detects the rotation of the drive shaft, a position detection switch is provided. The ventilation window begins to open or close when the electric motor rotates in the direction that the ventilation window opens or closes. When the fixed disc moves along the groove portion and the fixed disc makes one revolution, the protrusion contacts the stopper portion of the driven disc, and the driven disc rotates together with the fixed disc, and then has the groove portion, the contact portion and the concave portion. When the last driven disk rotates together with the previous driven disk, the contact part rotates and the roller of the switch for fully open position detection or switch for fully closed position detection falls into the recess and the rotation of the electric motor stops due to the switch operation and the ventilation window. Includes a device for opening / closing a ventilation window, which is in a fully opened or fully closed state.

[Industrial application field]

The present invention relates to a ventilating window opening / closing device, and more particularly to a ventilating window opening / closing device for greenhouses such as greenhouses for greenhouses and greenhouses.

[Conventional technology]

In recent years, while the size of greenhouses and centralized control have been rapidly increasing, forced ventilation using a ventilation fan has been shunned due to lack of ventilation volume and its inefficiency, and the method of natural ventilation has been reviewed. In order to reduce the labor required, the opening and closing of ventilation windows is automated using a power source such as a motor.

FIG. 17 is a schematic configuration diagram of a conventional greenhouse ventilation window opening / closing device.

In the figure, 1 is a greenhouse for institutional horticulture, 2 is this greenhouse 1
The ventilation window 3 attached to the is an opening / closing device for controlling the opening / closing of the ventilation window 2. In the opening / closing device 3 for the ventilation window, the rotational force of the electric motor 4 that rotates in the normal and reverse directions is converted into a rotational force that has been decelerated by the reduction mechanism 5, and the rotational force is also changed.
Is converted into the opening / closing operation of the ventilation window 2 via. On the other hand, the opening / closing control mechanism 7 provided on the output side of the speed reduction mechanism 5 detects the opening / closing position of the ventilation window 2 by detecting the output side rotation,
The detection signal of the opening / closing control mechanism 7 and the detection signal of the temperature detection thermistor 8 installed at an appropriate place in the greenhouse 1 are given to the controller 9, and the start / stop or rotation direction of the electric motor 4 is based on these signals. Is configured to control.

As the opening / closing mechanism 6 for the ventilation window 2, a link arm system that converts the rotational force of the output shaft of the reduction mechanism 5 into the opening / closing operation of the ventilation window 2 using a link arm, or a rack and pinion system using a rack and a pinion is used. There are methods.

For example, Japanese Utility Model Laid-Open No. 61-83854 discloses a technique relating to a device for opening and closing a ventilation window for a greenhouse using a link arm. In this conventional technique, the rotation of an electric motor that rotates normally and reversely is reduced by a belt, a pulley and a speed reducer, and a link for opening and closing a ventilation window is attached to a drive shaft of the speed reducer. When the drive shaft makes one full rotation, the fully open and fully closed position switches mounted on the outer peripheral surface of the boss of the drive shaft are operated in accordance with the fully open and fully closed positions of the ventilation window to control opening and closing. There is.

[Problems to be solved by the device]

The conventional opening / closing device for a ventilation window for a greenhouse detects the fully opened and fully closed positions of the ventilation window by installing a switch for the fully opened and fully closed positions of the ventilation window when the drive shaft makes one rotation. In the case of multiple rotations of the shaft of two rotations or more, it is difficult to directly detect the rotation, and a complicated mechanism is required, resulting in high cost. Further, in the conventional mechanism, it is not possible to use one rotation and multiple rotations, and separate mechanisms have to be used for the link arm system and the rack and pinion system. Further, in the conventional method of fixing with a screw such as a cam, it is difficult to adjust when tightening, and skill is required.

Therefore, the present invention can detect the fully open / closed position of the ventilation window with a simple mechanism even when the drive shaft makes two or more revolutions, which can reduce the cost and facilitate the adjustment during turning. It is an object of the present invention to provide a switchgear.

[Means for Solving the Problems]

The above-mentioned problem is to open and close a ventilation window from a drive shaft driven by an electric motor that rotates forward and reverse through an opening and closing mechanism, and to control the rotation of the electric motor by an opening and closing position detection unit that detects the rotation of the drive shaft. The window opening / closing device is equipped with a position detection switch, and when the electric motor rotates in the direction to open or close the ventilation window, the ventilation window begins to open or close, and along with that, the fixed disk rotates with the drive shaft and its protrusion is When the fixed disc moves along the groove of the driven disc and the fixed disc makes one revolution, the protrusion contacts the stopper of the driven disc, the driven disc rotates together with the fixed disc, and then the groove and the contact portion. And when the last driven disk with the concave part rotates together with the previous driven disk, the contact part rotates and the roller of the fully open position detection switch or fully closed position detection switch falls into the concave part and operates as a switch. More rotation of the motor is achieved good on switchgear ventilation window, characterized in that the stop ventilated window is fully opened or fully closed.

[Action]

In the present invention, in the opening / closing position detection unit 20 of the ventilation window opening / closing device,
A fixed disc (first disc) 22 is rotatably inserted into the drive shaft 19, and at least one or more driven discs (second discs) that are rotatably inserted into the drive shaft 19 and are driven by a locking mechanism when rotated by a desired angle. 2
When the drive shaft 19 is multi-rotated by two or more rotations by providing the third and third discs 24) and operating the fully open / closed position detection switches (27, 30) by the rotation of the driven disc. But,
With a simple mechanism, you can detect the fully open / closed position of the ventilation window.
The cost can be reduced and the adjustment during turning becomes easy.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

FIG. 1 is a front view of a ventilation window opening / closing device according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof.

In these figures, the opening / closing device for the ventilation window includes a forward / reverse rotation electric motor 11, a pulley 13 provided on an output shaft 12 (FIG. 3) of the electric motor 11, and a speed reducer for reducing the rotation speed to a predetermined speed. 14
And a pulley 16 provided on an input shaft (primary side shaft) 15 of the speed reducer 14 and a belt 17 stretched between the pulleys 13 and 16.
An opening / closing position detecting section 20 provided on the drive shaft 19 protruding from the casing body 18 on the output side of the speed reducer 14, and starting / stopping the electric motor 11 based on a signal detected by the opening / closing position detecting section 20. A control box that contains circuits that control the direction of rotation
It is composed of 21 and so on. The drive shaft 19 is provided with an opening / closing mechanism for opening / closing a ventilation window (not shown).

FIGS. 4 to 7 show an opening / closing position detecting portion of the embodiment of the present invention, and FIG.
Figures 16 to 16 are detailed views of the disk of the embodiment of the present invention.

In these figures, the casing body 18 on the output side is
A short cylindrical guide portion 18a (Fig. 6) is formed, a drive shaft 19 projects through the guide portion 18a, and an open / close position detecting portion 20 is provided on the drive shaft 19 side. The open / close position detecting unit 20 is composed of a fixed disc (first disc) 22, a driven disc (second disc) 23, a driven disc (third disc) 24, etc., which are inserted through the drive shaft 19. Has been the first of these
The third disks 22, 23, 24 are all manufactured by molding from a material such as polyacetal resin (for example, the trade name is DURACON) having excellent mechanical properties such as small wear and friction coefficient.

As shown in FIGS. 9 and 10, the first disc 22 is formed in a substantially ring shape, and the outer peripheral surface 22a on which the roller portion of the switch, which will be described later in detail, rolls while contacting, and the outer periphery on the front side. Part of the spur gear portion 22b, a shaft hole portion 22c into which the tip of the drive shaft 19 is fitted in the center, and a slightly larger diameter than the shaft hole portion 22c on the back side, and the outer diameter of the guide portion 18a is loosely inserted. Shaft hole 2
2d, a recess 22e into which the roller portion of the switch falls in a part of the outer peripheral surface 22a, a projection 22f provided on the rear end face near the recess 22e, a screw hole 22g for fixing the drive shaft 19, etc. And are formed.

The second disc 23 is, as shown in FIGS. 11 to 13, the first disc.
Similar to 22, it is formed in a substantially ring shape, the drive shaft 19 is inserted through the center, and the shaft hole portion 23a of a size into which the outer diameter of the guide portion 18a is loosely inserted, and the end face on the front side is fixed from the center. A groove portion 23b into which the projection 22f of the first circular plate 22 is fitted along the circumferential direction at a distance, and a stopper portion on the end side of the groove portion 23b.
23c and a protrusion 23d provided on the rear end face corresponding to the stopper 23c are formed.

The third disc 24 is, as shown in FIGS. 14 to 16, the first disc.
The outer peripheral surface 24a, which is formed in a substantially ring-like shape like 22 and rolls while the roller portion of the switch, which will be described later in detail, comes into contact with the drive shaft 19, and the guide portion 1
A shaft hole portion 24b of a size that allows the outer diameter of 8a to be loosely inserted, and the second circular plate along the circumferential direction at a fixed distance from the center on the front end face.
A groove 24c into which the protrusion 23d of 23 is engaged, a stopper 24d on the end side of the groove 24c, and a recess 24e into which the roller portion of the switch falls in a part of the outer peripheral surface 24a corresponding to the stopper 24d.
And an abutting portion 24f provided on the rear end face corresponding to the stopper portion 24d.

Then, as shown in FIG. 8, first to third circular plates 22 to 24
Are attached with their end faces aligned in this order. That is, as shown in FIG. 6, the first disc 22 has a shaft hole portion 22.
The c is fitted to the tip of the drive shaft 19 and fixed by the set screw 25. The second circular plate 23 has its shaft hole 23a inserted into the drive shaft 19 and is rotatably guided by the outer diameter portion of the guide 18a, and the projection 22f of the first circular plate 22 is engaged with the groove 23b. Be entered. The shaft hole 24b of the third disc 24 is inserted into the drive shaft 19 and is rotatably guided by the outer diameter portion of the guide portion 18a, and the projection 23d of the second disc 23 is engaged with the groove 24c. Be entered.

Further, in the casing body 18 around the third disk 24, a fully open position detecting switch 27 and a malfunction preventing switch 28 are provided on one mounting plate 26, and a fully closed position detecting switch 28 is provided on the other mounting plate 29. A switch 30 and a malfunction prevention switch 31 are provided. These switches 27, 28, 30, 31 move the mounting plates 26, 29 along the circumferential direction so that the drive shaft 1
The position of the rotation angle with respect to 9 can be adjusted, and it consists of a B contact type switch, and its roller part is the third
The outer peripheral surface 24a of the disc 24 is in contact with and pushed by the outer peripheral surface 24a. Further, as shown in FIG. 7, one end side of the third circular plate 24 is in contact with stopper parts 26a and 29a formed on the mounting plates 26 and 29, respectively, and the other end side thereof is on the other side. Return springs 32, 33 are formed near the rollers of the respective switches 27, 28, 30, 31 and are formed in an arc shape along the circumference of the third disk 24. This return spring 3
When the third disc 24 rotates, the contact portions 24
It is designed to be pushed by f.

In addition, the switches 27, 28, 3 around the first to third circular plates 22 to 24
A potentiometer 34 is attached to a fixed plate 35 at a portion of the casing main body 18 where 0 and 31 are not provided. A spur gear 36 having a small number of teeth is fixed to a shaft 34a of the potentiometer 34 with a set screw 37, and the spur gear portion 36a is meshed with a spur gear portion 22b of the first disc 22. .

That is, the rotational position of the drive shaft 19 corresponds to the rotational position of the potentiometer 34 according to the number of teeth of each spur gear portion 22b, 36a, and this value determines the degree of opening between the fully open and fully closed ventilation windows (not shown). Are controlled.

Next, the operation of the opening / closing device having the above configuration will be described.

First, when the electric motor 11 rotates in the direction in which the ventilation window opens, the pulleys 13 and 16 and the speed reducer 14 reduce the speed to a predetermined number of revolutions.
The drive shaft 19 starts rotating, and the ventilation window begins to open via an opening / closing mechanism (not shown). Along with that, the opening / closing position detector
At 20, the first disk 22 rotates together with the drive shaft 19, and the protrusion 22f thereof moves along the groove 23b of the second disk 23.
At this time, the second disc 23 remains stopped. 1st disc
When 22 further rotates and makes about one rotation, the protrusion 22f of the first disc 22 contacts the stopper 23c of the second disc 23, and the second disc 23 starts rotating together with the first disc 22. To do. This second
When the disc 23 rotates, the protrusion 23d moves along the groove 24c of the third disc 24. At this time, the third disk 24 remains stopped. When the second disc 23 further rotates and makes almost one revolution, the protrusion 23d of the second disc 23 abuts the stopper portion 24d of the third disc 24, and the third disc 24 becomes the first disc 22. And, rotation with the second disc 23 is started. When the third disk 24 further rotates, the contact portion 24f contacts the return spring 32 and rotates against the urging force, and the roller of the fully open position detection switch 27 causes the roller 24 of the third disk 24 to be recessed 24e. Then, the rotation of the electric motor 11 is stopped by the switch operation, and the exhaust window is fully opened. At this time, when the fully open position detection switch 27 does not operate due to some failure, the third disk 24 further rotates, and the roller of the malfunction prevention switch 28 falls into the recess 24e of the third disk 24, and the switch operation causes The rotation of the electric motor 11 stops.

Next, when the electric motor 11 rotates in the direction in which the ventilation window is closed from the fully opened state, the first disk 22 together with the drive shaft 19 first starts rotating in the opposite direction, contrary to the above operation. Then, when the first circular plate 22 makes one revolution, the second circular plate 23 becomes the first circular plate.
When the second disk 23 starts to rotate together with the disk 22 and makes almost one rotation, the third disk 24 starts to rotate together with the first disk 22 and the second disk 23, and the third disk 24 is rotated. Further rotation,
The contact portion 24f contacts the return spring 33 and rotates against the urging force of the return spring 33, so that the roller of the fully closed position detection switch 30 moves to the third disc 24.
The electric motor 11 is stopped from rotating due to the switch operation, and the ventilation window is fully closed. At this time, when the fully closed position detection switch 30 does not operate due to some failure, the third disk 24 is further rotated, and the roller of the malfunction prevention switch 31 is placed in the hole of the third disk 24.
It falls to 24e, and the rotation of the electric motor 11 is stopped by the switch operation.

In addition, when the electric motor 11 starts to operate in the fully open and fully closed states, the third disc 24 is slightly rotated by the urging force of the return spring 32 or 33 so that the fully open position detection switch 27 and the fully closed position detection switch 27 are provided. Since the roller of the switch 30 is disengaged from the recessed portion 24e and reset, the ventilation window can be operated from the middle to be fully opened or fully closed again.

Further, in the present embodiment, when the drive shaft 19 makes almost three revolutions, the fully open / fully closed position of the ventilation window can be detected, but the first circular plate 22 and the first circular plate 22 are excluded except for the second circular plate 23. By using the 3 disk 24, fully open when rotating twice with the same operation.
It is possible to detect the fully closed position. Further, by using only the first circular plate 22 excluding the second circular plate 23 and the third circular plate 24, it is possible to detect the fully open / fully closed position in the case of one rotation by the same operation. In this case, the recess 22e of the first circular plate 22
Plays a role in operating the switch.

As described above, in the present embodiment, even when the drive shaft 19 is rotated 3 times or less, the fully open / closed position of the ventilation window can be detected with a simple mechanism. Therefore, the link arm type and the rack and pinion type can be easily changed. Also, the first to third circular plates 22, 23, 24 are
Since it can be manufactured from a material such as polyacetal resin by molding, it is possible to make it cheaper and lighter in weight than machining using a metal material. Furthermore, when the switchgear of this embodiment is installed, the first to third discs
Adjusting 22,23,24 at the fully open position and then at the fully open position made adjustment easier.

In the above embodiment, the case where the drive shaft 19 has three rotations or less has been described as an example. However, by using a large number of discs having the same mechanism as the second disc 23, it is applicable to the case of multiple revolutions. It becomes possible to do. In this case, the position of the spur gear 36 may be adjusted according to the combined total thickness.

The first disc 22 is fixed to the drive shaft 19, and the other first and second discs 23 and 24 are discs that are rotatably inserted into the drive shaft 19 together with the first disc 22 so as to be driven. Good, for example, each 1st
The projections 22f, 23d of the third discs 22, 23, 24 and the grooves 23b, 24c may have a relationship in which the projections are in contact with each other, or the projections may come into contact with each other. It suffices that a locking mechanism is provided that is driven to rotate along with the other disk when is rotated by a predetermined angle.

Furthermore, although the present embodiment has been described taking the opening and closing of the ventilation window of the greenhouse as an example, the present invention is also applicable to a device that opens and closes the ventilation window by the electric motor 11.

[Effect of device]

As described above, according to the present invention, the fixed disk fixed to the drive shaft is used as the opening / closing position detection unit of the opening / closing device for the ventilation window.
Provided is at least one or more driven discs which are rotatably inserted into the drive shaft and driven by a locking mechanism when rotated by a desired angle, and the rotation of the driven discs causes the switch for fully open / fully closed position detection to operate. Thus, even when the drive shaft is multi-rotated more than two times, the fully open / closed position of the ventilation window can be detected by a simple mechanism, which can reduce the cost and facilitate the adjustment at the time of construction. .

[Brief description of drawings]

1 to 16 show a ventilation window opening / closing device of an embodiment of the present invention, FIG. 1 is a front view of the ventilation window opening / closing device, FIG. 2 is a plan view of the ventilation window opening / closing device, and FIG. Is a side view of the opening / closing device for the ventilation window, FIG. 4 is a front view of the opening / closing position detector, FIG. 5 is a side view of the opening / closing position detector, FIG. 6 is an exploded perspective view of the opening / closing position detector, and FIG. Is a front view in which a part of the open / closed position detector is broken, FIG. 8 is a side view of the disc portion, FIG. 9 is a side view of the first disc, FIG. 10 is a rear view of the first disc, and 11 The drawing shows the front view of the second disc, Fig. 12 the side view of the second disc, Fig. 13 the rear view of the second disc, Fig. 14 the front view of the third disc, and Fig. 15 14 is a sectional view taken along the line AA in FIG. 14, FIG. 16 is a rear view of the third disk, and FIG. 17 is a schematic configuration diagram of a conventional greenhouse ventilation window opening / closing device. In the figure, 11 is an electric motor, 12 is an output shaft, 13 and 16 are pulleys, 14 is a reducer, 15 is an input shaft, 17 is a belt, 18 is a casing main body, 18
a is a guide part, 19 is a drive shaft, 20 is an opening / closing position detecting part, 21 is a control box, 22 is a first disc, 22a and 24a are outer peripheral surfaces, 22b and 36a are spur gear parts, 22c, 22d and 23a, 24b is a shaft hole, 22e and 24e are recesses, 22
f, 23d is a protrusion, 22g is a screw hole, 23 is a second disc, 23b, 24
c is a groove portion, 23c, 24d, 26a and 29a are stopper portions, 24 is a third circular plate, 24f is a contact portion, 25 and 37 are set screws, 26 and 29 are mounting plates, 27 is a switch for fully open position detection, 28 and 31 are malfunction prevention switches, 30 is a fully closed position detection switch, 32 and 33 are return springs, 34 is a potentiometer, 34a is a shaft, 35 is a fixed plate, and 36 is a spur gear.

Claims (2)

[Scope of utility model registration request] 1. An opening / closing position detection for opening and closing a ventilation window by a drive shaft (19) driven by an electric motor (11) which rotates in forward and reverse directions through an opening and closing mechanism and detecting rotation of the drive shaft (19). A ventilation window opening / closing device for controlling the rotation of the electric motor (11) by the section (20) is provided with position detection switches (27, 30), and ventilation is performed when the electric motor (11) rotates in a direction in which the ventilation window opens or closes. The window starts to open or close, and the fixed disk (22) rotates with the drive shaft accordingly, and the protrusion (22f) moves along the groove of the adjacent driven disk (23) to fix the fixed disk (22). Is rotated about 1 turn, the protrusion (22f)
Is in contact with the stopper portion (23c) of the driven disc (23), the driven disc (23) rotates together with the fixed disc (22), and then the groove portion (24c), the contact portion (24f) and the recessed portion (24e). When the last driven disk (24) having the above (4) rotates together with the previous driven disk (23), the contact portion (24f) rotates and the fully open position detection switch (27) or the fully closed position detection switch (30). The roller of () falls into the recess (24e) and the rotation of the electric motor is stopped by the switch operation, and the ventilation window is fully opened or fully closed. 2. The last driven disk (24) continues to rotate when the fully open position detecting switch (27) or the fully closed position detecting switch (30) does not operate, and the malfunction preventing switch (2) is provided.
8) or (31) roller is recessed part (24e) of driven disk (24)
The opening and closing device for a ventilation window according to claim 1, wherein the rotation of the electric motor (11) is stopped by the switch operation.