JP3219346U - Greenhouse curtain stop device - Google Patents

Abstract

Disclosed is a greenhouse curtain stop device that can reliably secure an open / close stop position without causing a problem of frictional force due to gear interlocking. A greenhouse curtain stop device in which a moving nut that moves horizontally by the mutual movement of a worm gear and a screw rod turns on and off the microswitch, and rotates the screw rod 4 interlocked with the rotation of the worm wheel 3 engaged with the worm gear 2. By doing so, the moving nut 11 having a detent function disposed on the left and right of the worm wheel moves horizontally. The curtain is set to an open / close stop position by turning on / off the arm 15 of the switch disk 14 in contact with the microswitch 20. [Selection] Figure 2

Description

  The present invention relates to a greenhouse curtain stopping device capable of stopping a curtain at a predetermined opening / closing position.

  It is extremely important for plant growth to perform daylighting and temperature adjustment of the greenhouse, and for that purpose, it is a means for opening and closing the vinyl curtain that is hung on the greenhouse body, and it is an opening and closing control device that starts from the drive shaft linked to the motor Conventionally, various techniques have been proposed in order to make the operation function of the system work effectively. In general, the rotation of the drive shaft is transmitted to the first rotation shaft via the speed reduction mechanism, and the movement of this rotation shaft is applied to the second rotation shaft via the next speed reduction mechanism, so that the curtain is turned on by the on / off switch. The movement is controlled at a predetermined opening / closing position, and in a configuration in which the curtain is stopped at a predetermined position by a switch of the rotation shaft, a concave cam is used for the switch, and the concave cam is engaged. It is known that the curtain can be stopped at a predetermined position by providing an operating micro switch.

  Therefore, in the above technique, the rotation shaft is moved by the gear engagement means, the first rotation shaft and the second rotation shaft are decelerated, and the microswitch is turned on and off by the action of the cam member. If the reduction ratio is large, there is a problem that the curtain cannot be stopped at a predetermined position. For example, when the drive shaft rotates 360 °, the first rotation shaft rotates 30 °, and the second rotation shaft rotates 360 °, an error of 1 ° occurs in the second rotation shaft. An error of 30 ° occurs in the rotating shaft, the driving shaft becomes an error of one rotation, and assuming that the curtain driving wire moves 20 cm by one rotation of the driving shaft, the opening / closing position of the curtain has an error of 20 cm, and the curtain is predetermined. This is because the gear does not stop at the position, that is, the gear prime factor is a negative factor for the curtain opening / closing operation.

  Therefore, a convex cam is provided on the second rotating shaft, and the convex cam portion rotates against the spring elasticity of the microswitch to actuate the microswitch so as to absorb the play and the like existing in the speed reduction mechanism. There is also a technique in which the curtain can be stopped at an open / closed position arbitrarily set even if it is installed without any change (see, for example, Patent Document 1).

3 and 4 of JP-A-2002-101768

  By the way, all of the prior arts employ a method in which the speed reducing mechanism in the device box is configured by a combination of gears, and the rotating cam acts on the microswitch as a result of interlocking the first rotating shaft and the second rotating shaft. ing. For this reason, the device must be configured on the premise that a plurality of gears are incorporated in the box, so that the structure becomes complicated and the manufacturing process increases and the cost increases. Therefore, once the gear rotation is flawed, the curtain opening / closing stop position may be different from the expected setting.

  In the present invention, the speed reduction mechanism does not transmit the rotation between the gears as in the prior art. Therefore, there is no trouble of frictional force due to gear interlocking, and the opening / closing stop position is ensured to ensure the ventilation / It is an object of the present invention to provide a stopping device capable of exerting daylighting and temperature adjustment on a cultivation target in a greenhouse.

  In order to solve the above problems, the present invention is attached to a switch disc of a moving nut having a detent function disposed on the left and right of the worm wheel when the screw rod rotates in conjunction with the rotation of the worm wheel meshed with the worm gear. The main purpose is to stop the curtain at a predetermined position when the arm touches the microswitch.

  The moving nut is configured by attaching the switch disk to a nut main body screwed into a screw rod, and the arm of the switch disk is guided in a guide groove formed in a mounting wall in the casing along the screw rod. When the fixing screw is tightened, the switch disk fixed to the nut main body rotates and the arm comes into contact with the microswitch when horizontally moving but not rotating.

  Two micro switches are attached to both the open and closed sides, and connecting pieces are attached across both.

  Two LED lights provided in the casing are turned off when the microswitch is turned on and turned on when the switch is turned off.

  Although the speed reduction mechanism is an occlusion between the worm gear and the worm wheel, the screw rod is linked to the worm wheel, so the speed reduction mechanism is based on a completely different movement from the conventional technology that mainly uses a combination of gear and gear. ing. That is, in order to open and close the curtain, the cam disk coaxial with the gear does not rotate and the micro switch is operated, but the switch disk of the moving nut that moves horizontally on the screw rod contacts the micro switch. This is a simple and reliable configuration, which makes it possible to control a predetermined stop position when opening and closing the curtain.

  Despite the simple configuration that the moving nut is mounted on the screw rod integrated with the worm wheel and the micro switch is provided inside the main body of the device, it is possible to demonstrate the sufficient opening / closing stop function as described above, and therefore it is manufactured. However, it is not a combination of several types of gears, so that it is possible to suppress the occurrence of malfunctions due to lubricant depletion, etc., and a long and normal movement is expected.

  If two microswitches are provided on both the open and closed sides, even if one microswitch malfunctions for some reason, other microswitches will function, so there is no risk of obstructing the opening and closing of the curtain.

It is explanatory drawing which shows an example of the greenhouse which attaches this invention. It is a schematic overhead view of the principal part of this invention. It is component drawing of a main structural member. It is a front view before and after contact of a switch disc and a microswitch. It is the side view which looked at FIG. 4 from the frame wall side.

  The stop device of the present invention is implemented in a general greenhouse 30 as shown in FIG. 1, and is interlocked with the rotation of a drive drum 31 provided along one side wall surface of the greenhouse. That is, the opening / closing wire 33 of the curtain 32 is wound endlessly between the driving drum 31 and the pulley 34 on the other side wall via the relay pulley 35 and the intermediate pulley 36, and the driving drum 31 rotates in the direction of arrow C. Then, the wire 33 moves in the direction of the arrow A, and the other side of the wire 33 moves in the direction of the arrow B. When the driving drum 31 rotates in the direction of the arrow C, the wire 33 moves in the direction of the arrow A, and the other side of the wire 33 moves in the direction of the opposite arrow B. The curtain opening / closing stop device of the present invention is set.

  2 shows the main part of the present invention, and FIG. 3 shows the main components. Reference numeral 1 denotes a casing, and a worm gear 2 that rotates when the motor is driven is attached to the worm gear 2. Is biting. The worm wheel 3 is fixed to a screw rod 4 having both sides pivoted on the casing side with a mediator 5 interposed therebetween. Therefore, since the worm wheel 3 and the screw rod 4 are interlocked, the worm gear 2 is connected to the worm wheel 3. The screw rod 4 rotates forward and backward by the transmitted rotational force.

  The mediating material 5 of the worm wheel 3 includes a fitting portion 7, a corrugated spring 8, its pressing piece 9, and an E-ring 10 that form a holding portion 6 at the end and match the engagement hole of the worm wheel 3. In order to prevent overshoot, left and right worm wheels 3 are symmetrically arranged with moving nuts 11 that move horizontally on the screw rods 4.

  The moving nut 11 is configured by attaching a switch disk 14 to a nut main body 12 screwed to the screw rod 4. The switch disk 14 is rotatably fitted to the convex peripheral surface 13 of the nut main body 12, but is fixed to the nut main body 12 by tightening a fixing screw 18. An arm 15 projects from the switch disk 14, and the arm 15 advances and retreats along the guide groove H of the frame wall 1 a provided inside the casing 1. Therefore, the switch disk 14 before fixing the screw does not rotate. Therefore, the moving nut 11 moves horizontally along the screw rod 4 but does not rotate. A presser plate 16 and an E-ring 17 face the side surface of the switch disc 14 so that manual fine adjustment of the moving nut 11 can be achieved.

  Then, when the curtain is kept in a predetermined open or closed position, the switch disk 14 is rotated and the fixing screw 18 is tightened and fixed at a position where the arm 15 contacts the microswitch 20. (See FIGS. 4 and 5). The fixed switch disk 14 becomes immovable at the position where the arm 15 contacts the microswitch 20 and the power circuit is opened, so that both the worm gear 2 and the worm wheel 3 stop moving, so that the screw rod 4 Since the rotation of the curtain is also stopped, the open or closed position of the curtain is securely held.

  That is, the microswitch 20 is opposed to the switch disk 14 with the frame wall 1 a interposed therebetween, and the arm 15 passes through the guide groove H and faces the microswitch 20. The microswitch 20 has an elastic contact plate 21 on the upper surface, and the lug 22 is located on the lower surface of the elastic contact plate, so that the arm 15 is separated from the elastic contact plate 21 before the fixing screw 18 is tightened. However, when the switch disk 14 is rotated and the fixing screw 18 is tightened, the arm 15 shifts from the upward state to the horizontal state, presses the elastic contact plate 21, and the retractor 22 located on the lower surface thereof Immerse and switch on.

  For example, if the microswitch 20 is turned on by the arm 15 of the switch disk 14 and the curtain is open, the opening is connected while the microswitch 20 is operating, and a predetermined time has passed. If it is necessary to close the curtain, the movement nut 11 in the opposite position is set to move in the opposite direction on the screw rod 4 that rotates in conjunction with the worm wheel 3 rotated in the reverse direction. The nut 11 is close to the micro switch 20, and the arm 15 is operated in the same manner as described above to energize the micro switch 20 on the opposite side. Of course, the moving nut 11 set at this time is interlocked with the horizontal movement of the arm 15 in the guide groove H, but does not rotate.

  That is, if one of the movable nuts 11 turns on or off one of the micro switches 20, the curtain stop position is fixed, and the other micro switch 20 is turned on by the switch disk 14 of the other moving nut 11. If this happens, the stop position for either opening or closing of the curtain is fixed, and at that time, the curtain opening / closing failure based on the prime factor に よ る due to the combination of gears, that is, the problem of not closing or not fully opening can occur. Absent.

  Although it is sufficient to have one micro switch 20 for opening and closing, it cannot be said that there is no malfunction or failure for some reason during long-term use, so it is unpredictable by providing two at each location. Can be avoided. In order to operate the two micro switches 20, it is only necessary to attach the connecting piece 23 on the upper surface across both sides, and the small micro switch 20 is easy to arrange because it fits in the narrow space of the casing 1. In addition, since it is not necessary to perform any work on the arm 15 of the switch disk 14, no special effort is required in production.

  Reference numeral 24 in FIG. 1 denotes LED lights associated with the left and right microswitches 20, and these lights are turned off when the microswitch 20 is turned on and turned on when the microswitch 20 is turned off. The two LED lights 21 can be easily recognized at any curtain stop position, for example, with red light on one side and blue light on the other, so that the emission colors are different. This is because when the opening / closing setting is completed, the micro switch is turned on and the opening / closing stop position of the curtain is fixed, so that the screw rod stops moving.

DESCRIPTION OF SYMBOLS 1 Casing 1a Frame wall H Guide groove 2 Worm gear 3 Worm wheel 4 Screw rod 5 Intermediary material 6 Press part 7 Fit part 8 Corrugated spring 9 Press piece 10 E ring 11 Moving nut 12 Nut main body 13 Concave surface 14 Switch disk 15 Arm 16 Presser plate 17 E-ring 18 Fixing screw 20 Micro switch 21 Elastic contact plate 22 Extruder 23 Linking piece 24 LED light 30 Greenhouse 31 Driving drum 32 Curtain 33 Opening and closing wire

Claims (3)

  When the screw rod rotates in conjunction with the rotation of the worm wheel engaged with the worm gear, the switch disc of the moving nut having a detent function arranged on the left and right of the worm wheel contacts the micro switch to open and close the curtain to a predetermined position. Stop device for greenhouse curtains to stop.   The moving nut has a nut main body and a switch disk in which a projecting arm advances and retreats along a guide groove on the frame wall, and the switch disk moves horizontally along the screw rod but does not rotate. The greenhouse curtain stop device according to claim 1, wherein:   The greenhouse curtain stopping device according to claim 1 or 2, wherein the switch disc includes a presser plate and an E-ring, and further includes a fixing screw for fixing the switch disc to the nut main body.

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