JP4382767B2 - Greenhouse film opener - Google Patents

Description

  The present invention relates to a greenhouse film opening / closing device for opening and closing a greenhouse film which is disposed on a side surface or a valley of a greenhouse and which is opened and closed for ventilation.

Patent Document 1 discloses a greenhouse film opening / closing device using a DC motor as a drive unit. It is an apparatus that opens and closes by winding or rewinding a greenhouse film by rotating a winding shaft by driving of a driving unit. The switchgear is provided with two limit switches for stopping the driving of the drive unit at each limit position on the winding side and the rewinding side, and the switching position of the two limit switches can be arbitrarily adjusted. It has become.
JP 2001-128563 A

  In the switchgear disclosed in Patent Document 1, a switch operating member that switches a limit switch and an initial position adjusting member that adjusts a switching position by rotating the switch operating member at an arbitrary angle operate in synchronization. It is the composition to do. Therefore, if the initial position adjusting member is rotated once, the switch operating member is rotated once. For this reason, it is difficult to finely adjust the limit position on the winding side or the rewinding side by rotating the initial position adjusting member. That is, when adjusting the switching position, the opening and closing of the greenhouse film is repeated several times and readjusted. However, in the case shown in Patent Document 1, the rotation angle of the initial position adjusting member operated with fingers is the same. It has been very difficult to adjust the switch operating member in units of several degrees or tens of degrees. In Patent Document 1, a DC motor is used for the drive unit. However, even if an AC motor is used, there is a similar problem.

  The present invention has been made in view of the above, and provides a greenhouse film opening / closing device that can finely control the initial position of the switch operating member and can slightly adjust the limit positions on the wind-up side and the rewind side of the greenhouse film. The task is to do.

In order to solve the above-mentioned problem, in the present invention according to claim 1, a greenhouse film opening / closing device comprising a winding shaft for winding or unwinding a greenhouse film to open and close and a drive unit for rotating the winding shaft. In
A drive stop switch for stopping the drive of the drive unit;
It is provided with a projecting piece projecting outward, and has an internal gear having a tooth portion on the inner peripheral edge, and is rotated by a predetermined angle by driving of the drive unit, and the winding shaft is in a limit position or a winding direction of the greenhouse film When the return direction limit position is reached, the protruding piece presses and switches the drive stop switch, and a switch operation member that stops the drive of the drive unit,
A tooth portion meshing with the switch operation member made of the internal gear is provided on the outer peripheral edge, the number of teeth is smaller than that of the switch operation member, and the center is located at a position eccentric to the center of the switch operation member; A reduction gear mechanism having an external gear having a plurality of holes formed at equal intervals along the circumferential direction inside the outer peripheral edge;
The switch has a small diameter portion whose center matches the center of the switch operating member, and a large diameter portion whose center matches the center of the external gear and is inserted into the central hole of the external gear. An initial position adjusting member for adjusting an initial position by rotating the operating member at an arbitrary angle, and adjusting a timing of a switching operation by the switch operating member;
A plurality of support projections formed on a drive transmission gear for transmitting rotation of the drive unit, and having an outer diameter smaller than the inner diameter of the hole of the external gear;
With
When the initial position adjusting member is rotated in a state where the support protrusions are inserted in the holes of the external gear, the external gear revolves around the center of the switch operation member, and every revolution, There is provided a greenhouse film opening / closing device having a structure for rotating the switch operating member by a difference in the number of teeth from the external gear .
In the second aspect of the present invention, when the initial position adjustment member is rotated in a state where each hole portion of the external gear is detached from the support protrusion, the rotation operation of the initial setting position adjustment member external gears and the switch operating member to provide a greenhouse film switchgear according to claim 1, wherein the rotating synchronously.
In this invention of Claim 3, when the said drive part is driven and the winding axis | shaft is rotated, the said support protrusion is located in each hole part of the said external gear, 3. The greenhouse film opening / closing device according to claim 1, wherein when the drive transmission gear is rotated by driving, the external gear and the switch operating member are rotated synchronously through the support protrusion .
In the present invention according to claim 4 , the drive stop switch is provided with two for the greenhouse film winding direction limit position and the rewinding direction limit position, the switch operation member, the initial position adjustment member, And the reduction gear mechanism provides the greenhouse film opening / closing apparatus of any one of Claims 1-3 provided corresponding to each drive stop switch.
In this invention of Claim 5 , the said drive stop switch is a limit switch, The greenhouse film opening / closing apparatus of any one of Claims 1-4 is provided.
In the present invention according to claim 6 , further comprising a moving mechanism attached to the drive unit to move the drive unit along the bar-shaped member for guide in accordance with the opening and closing operation of the greenhouse film by the winding shaft,
The moving mechanism has an upper roller group and a lower roller group disposed at a predetermined interval along the moving direction,
The upper roller group and the lower roller group each include wheels arranged at three or more locations at substantially equal intervals along the circumferential direction so as to be able to contact the peripheral surface of the guide bar-shaped member. The greenhouse film opening / closing device according to any one of 1 to 5 is provided.
In this invention of Claim 7, the wheel which comprises the said upper stage roller group and the lower stage roller group is respectively arrange | positioned at three places at substantially equal intervals along the circumferential direction, The greenhouse film opening / closing apparatus of Claim 6 I will provide a.

  In the greenhouse film opening and closing device of the present invention, a switch operation member that switches a drive stop switch that stops driving of the drive unit, and an initial position adjustment member that adjusts the switching position of the switch operation member are provided via a reduction gear mechanism. It is connected. Therefore, when the initial position adjusting member is rotated, the rotational movement of the initial position adjusting member is decelerated and transmitted to the switch operating member. As a result, since the rotation amount of the switch operation member is smaller than the rotation amount of the initial position adjustment member, fine control of the switch operation member is possible, and the limit positions on the wind-up side and the rewind side of the greenhouse film are possible. Slight adjustment is possible.

  In particular, the switch operating member is composed of an internal gear having a tooth portion on the inner peripheral edge, and the reduction gear mechanism is provided with a tooth portion meshing with the switch operating member formed of the internal gear on the outer peripheral edge. Use a member having fewer external gears than the operation member, and further, as an initial position adjustment member, a small diameter portion whose center matches the center of the switch operation member and a large diameter portion whose center matches the center of the external gear. Since the reduction ratio can be increased by using the one having the switch, the initial position of the switch operation member can be adjusted more finely by rotating the initial position adjustment member.

  Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a schematic plan view showing an appearance of a greenhouse film opening / closing device 1 according to the embodiment of the present invention, and FIG. 2 is a rear view.

  As shown in FIGS. 1 and 2, the greenhouse film opening / closing device 1 according to the present embodiment includes a driving unit 10, a moving mechanism 20, a take-up shaft 30, and a control unit 40. The drive unit 10 includes a motor 11 serving as a drive source, and a casing 12 that supports the motor 11 and incorporates a gear mechanism (not shown) that transmits the rotational driving force of the motor 11 therein. Composed. The casing 12 is provided with a tubular support shaft 13, and the end of the take-up shaft 30 is inserted into and connected to the tubular support shaft 13. One end of the tubular support shaft 13 is connected to a worm 51 provided in the control unit 40 (see FIGS. 4 and 5).

  The moving mechanism 20 is attached to the drive unit 10 so that the wheels 21 a and 22 a are in contact with the peripheral surface of the guide rod-like member 25 inserted in the center and can move along the guide rod-like member 25. Is provided. That is, by having this moving mechanism 20, when the motor 11 of the drive unit 10 rotates, the rotation of the drive unit 10 is prevented and the drive of the drive unit 10 is transmitted to the winding shaft 30. As a result, when the take-up shaft 30 winds or rewinds the greenhouse film, the moving mechanism 20 rises or descends along the guide rod-shaped member 25 together with the drive unit 10 and the control unit 40.

  The moving mechanism 20 may have any structure as long as it fulfills such a function, and the structure disclosed in Patent Document 1 can be used. In the present embodiment, the following structure is used. Is used.

  That is, as shown in FIGS. 1 to 3, the moving mechanism 20 includes an upper roller group 21 and a lower roller group 22 disposed at predetermined intervals along the moving direction, and the upper roller group. 21 and the lower roller group 22 can be brought into contact with the circumferential surface of the guide rod-shaped member 25, and are arranged at three substantially equal intervals along the circumferential direction, that is, at intervals of approximately 120 degrees. Wheels 21a and 22a are provided. Thereby, compared to a structure in which only two wheels are disposed across the guide rod-shaped member 25, it is possible to receive a biased load in the thrust direction of the winding shaft 30 caused by the weight of the drive unit 10, etc. When the wheels 21a and 22a of the moving mechanism 20 move along the guide rod-like member 25, it is possible to suppress the occurrence of a so-called galling phenomenon (lock phenomenon) or the like, thereby enabling smooth movement.

  The wheels 21a and 22a can be provided at four or more locations along the circumferential direction. However, since the number of wheels is as small as possible and the load can be more reliably received at a low cost, the present embodiment. Thus, it is preferable to arrange them at approximately equal intervals in three places. Further, it is preferable to reduce the frictional resistance during rotation, for example, by supporting the wheels 21a and 22a via bearings. If the frictional resistance at the time of rotation is small, the movement along the guide rod-like member 25 becomes smoother, so that the unbalanced load generated on the take-up shaft 30 is reduced and the distance between the upper roller group 21 and the lower roller group 22 is reduced. It is possible to reduce the size such as reducing the size. Each wheel 21a, 22a is formed in a substantially V shape or a substantially U shape in plan view, or in an arc shape along the peripheral surface of the guide rod-like member 25 as shown in FIGS. It is preferable to use what was done. Thereby, it is possible to suppress the displacement of the periphery of the guide rod-shaped member 25 in the circumferential direction when an unbalanced load is applied.

  As shown in FIGS. 4 to 6, the control unit 40 is provided with two limit switches 41 and 42 as drive stop switches for stopping the drive of the motor 11 of the drive unit 10. One limit switch 41 stops driving the motor 11 when the contact is switched at the limit position on the take-up side, and the other limit switch 42 drives the motor 11 when the contact is switched at the limit position on the rewind side. Stop. Corresponding to each limit switch 41, 42, two switch operation members 43, 44 and two adjustment knobs 45, 46 which are initial position adjustment members are provided, and each switch operation member 43, 44 and each adjustment. Knobs 45 and 46 are connected to each other via a reduction gear mechanism. The switch operation members 43 and 44 are formed in an annular shape so as to be able to switch by pressing the contact points 41a and 42a of the limit switches 41 and 42 when rotated by a predetermined amount from the initial position as the drive unit 10 is driven. In addition, projecting pieces 43b and 44b that project outwardly in a substantially mountain shape or a substantially triangular shape are provided.

  On the other hand, as described above, the control unit 40 has the worm 51 to which one end of the tubular support shaft 13 is connected, and the drive of the drive unit 10 is transmitted to the switch operation members 43 and 44 through the worm 51. The Specifically, as shown in FIGS. 5 to 7, a worm wheel 52 that meshes with the worm 51 is disposed in the control unit 40, and the worm wheel 52 is coaxially connected to the worm wheel 52. A first bevel gear 53 that rotates in accordance with the rotation of the wheel 52 is provided. The first bevel gear 53 is formed with two tooth portions 53a and 53b on one end side and the other end side in the axial direction, and the tooth portions 53a and 53b are engaged with each other. Two bevel gears 54 and 55 are provided. The worm 51, the worm wheel 52, the first bevel gear 53, and the second bevel gears 54, 55 constitute a drive transmission gear defined in claim 4.

  The second bevel gears 54 and 55 are respectively supported by two rotation support shafts 58 and 59 provided in a direction orthogonal to the rotation support shaft 57 of the worm wheel 52 and the first bevel gear 53. A plurality of support protrusions 54a and 55a are provided on the back surfaces of the second bevel gears 54 and 55 constituting one of the drive transmission gears. In the present embodiment, as shown in FIG. 8, eight support protrusions 54a and 55a are provided, and the external protrusions 47 and 48 constituting the reduction gear mechanism described above are supported by the support protrusions 54a and 55a. Is done.

  The reduction gear mechanism has external gears 47 and 48 having teeth 47a and 48a on the outer peripheral edge, and the switch operation members 43 and 44 themselves formed in the internal gear structure also constitute a part of the reduction gear mechanism. More specifically, the switch operating members 43 and 44 are formed in an internal gear structure having tooth portions 43a and 44a on the inner peripheral edge, and the outer gears 47 and 48 are formed in the inner peripheral edge of the switch operating members 43 and 44. The teeth 47a and 48a of the external gears 47 and 48 are arranged so as to mesh with the teeth 43a and 44a of the switch operating members 43 and 44, respectively. The external gears 47 and 48 are formed in such a size that only a part of the tooth portions 47 a and 48 a mesh with the tooth portions 43 a and 44 a of the switch operation members 43 and 44. The number of teeth of the tooth portions 47a and 48a is smaller than the number of teeth of the tooth portions 43a and 44a of the switch operation members 43 and 44 (see FIG. 8). In the present embodiment, the difference in the number of teeth is set to 1, but the present invention is not limited to this. Further, the outer gears 47 and 48 are formed with central hole portions 47b and 48b, and around the central hole portions 47b and 48b and inside the outer peripheral edges (tooth portions 47a and 48a) in the circumferential direction. A plurality of hole portions 47c and 48c formed at equal intervals along are formed. Since the above-described support protrusions 54a and 55a are inserted into the holes 47c and 48c, eight holes 47c and 48c are provided in the present embodiment similarly to the support protrusions 54a and 55a. Further, the inner diameters of the holes 47c and 48c are formed to be larger than the outer diameter of the support protrusions 54a and 55a.

  The center P of the central hole portions 47b and 48b of the external gears 47 and 48 is from the axis (center) Q of the rotary support shafts 58 and 59, the second bevel gears 54 and 55, and the switch operating members 43 and 44. It is provided so as to be shifted (eccentric position). Specifically, as shown in FIG. 9, each adjustment knob 45, 46 includes a small diameter portion 45a, 46a and a large diameter portion 45b, 46b, and the center and large diameter of the small diameter portion 45a, 46a. When the rotary support shafts 58 and 59 are inserted into the hollow portions and attached to the hollow portions, the narrow diameter portions 45a and 46a are formed. Is arranged so as to coincide with the axial centers (centers) Q of the rotary support shafts 58 and 59, the second bevel gears 54 and 55, and the switch operation members 43 and 44. The large diameter portions 45 b and 46 b are inserted into the center hole portions 47 b and 48 b of the external gears 47 and 48, and are arranged so that the centers of the large diameter portions 45 b and 46 b coincide with the center P of the external gears 47 and 48. The The adjustment knobs 45 and 46 may be provided so as to rotate around the respective rotation support shafts 58 and 59 inserted into the hollow portion, or together with the rotation support shafts 58 and 59 with respect to the casing 60. It may be provided to rotate.

  As shown in FIGS. 7 and 10, the switch operating members 43 and 44 are, as shown in FIG. 7 and FIG. 10, small annular portions 47 e (48 e) surrounding the periphery of the external gears 47 and 48 and the large annular portions 47 d and 48 d and the adjustment knobs 45 and 46. ), The large annular portions 47d and 48d and the small annular portions 47e and 48e are formed separately, and the small annular portions 47e and 48e are fixed to the casing 60, You may provide so that only the macrocyclic parts 47d and 48d may rotate. One end of a coil spring 49 surrounding the adjustment knobs 45 and 46 is fixed to the inner surfaces of the small annular portions 47e and 48e. The other end of the coil spring 49 is at least partially in contact with the external gears 47 and 48, the external gears 47 and 48 are pressed against the second bevel gears 54 and 55, and the holes 47c and 48c are supported in a normal state. The projections 54a and 54b are biased so as to be located outside. For this reason, as shown in FIG. 11, when the adjustment knobs 45 and 46 are pulled forward, the external gears 47 and 48 move together with the adjustment knobs 45 and 46 against the elasticity of the coil spring 49, The holes 47c and 48c are separated so that they are not in contact with the support protrusions 54a and 55a.

  Next, the operation of this embodiment will be described. First, in the operation for winding or rewinding the greenhouse film, as shown in FIG. 10, the holes 47c and 48c of the external gears 47 and 48 are formed on the support protrusions 54a and 55a of the second bevel gears 54 and 55, respectively. It is in an engaged state. The switch operation members 43 and 44 are set so that the protruding pieces 43b and 44b are in appropriate positions. In this state, when the motor 11 of the drive unit 10 is driven, the take-up shaft 30 rotates through the tubular support shaft 13 and winds up or rewinds the greenhouse film. When the greenhouse film is taken up or rewound, the moving mechanism 20 rises or descends along the guide rod-like member 25, and accordingly, the entire greenhouse film opening / closing device 1 of the present embodiment rises or descends. At this time, if the moving mechanism 20 shown in the present embodiment is used, the moving mechanism 20 is excellent in absorbing the unbalanced load when the greenhouse film is wound or rewound, and the moving mechanism 20 smoothly moves along the guide rod-shaped member 25. As described above, it can be moved up and down.

  On the other hand, when the tubular support shaft 13 and the winding shaft 30 are rotated by driving the motor 11, the worm 51 of the control unit 40 connected to one end of the tubular support shaft 13 is rotated. When the worm 51 rotates, the worm wheel 52 rotates, and the first bevel gear 53 rotates accordingly. Then, the two second bevel gears 54 and 55 meshing with the two tooth portions 53a and 53b provided at the respective end portions of the first bevel gear 53 rotate. When the second bevel gears 54 and 55 are rotated, the support protrusions 54a and 55a press the inner walls of the fitted holes 47c and 48c, and the tooth portions of the external gears 47 and 48 as shown in FIG. A part of 47a, 48a is pressed against the tooth portions 43a, 44a of the switch operating members 43, 44. As a result, the switch operation members 43 and 44 having the internal gear structure do not rotate relative to the external gears 47 and 48 but rotate in synchronization with the external gears 47 and 48.

  Therefore, when the tubular support shaft 13 is rotated by the motor 11 of the drive unit 10 and the take-up shaft 30 rotates to wind up the greenhouse film, the control unit 40 takes the worm 51, the worm wheel 52, and the first bulkhead. The switch operating members 43 and 44 rotate in a predetermined direction via the gear 53, the second bevel gears 54 and 55, and the external gears 47 and 48. When the switch operating members 43 and 44 rotate by a predetermined amount in a predetermined direction, the projecting pieces 43b and 44b press the contacts 41a and 42a of the limit switches 41 and 42, cut off the circuit, and the motor of the drive unit 10 11 is stopped. For example, at the winding limit position (upper limit position), the protruding piece 43b of one switch operating member 43 presses the contact 41a of one limit switch 41 to stop driving the motor 11, and the rewind limit position (lower limit position). ), The protruding piece 44b of the other switch operating member 44 presses the contact 42a of the other limit switch 42 to stop the driving of the motor 11.

  On the other hand, the adjustment of the winding limit position or the rewinding limit position, that is, the adjustment of the initial positions of the projecting pieces 43b and 44b of the switch operating members 43 and 44 is performed as follows. First, when it is desired to greatly adjust the initial position, the adjustment knobs 45 and 46 are pulled toward the front against the elastic force of the coil spring as shown in FIG. The second bevel gears 54 and 55 are not positioned around the support protrusions 54a and 55a. In this normal state, when the adjustment knobs 45 and 46 are rotated, the outer gears 47 and 48 connected to the large diameter portions 45b and 46b have their centers P revolved around the centers Q of the switch operation members 43 and 44. However, since the movements of the external gears 47 and 48 are not restricted, the external gears 47 and 48 rotate together with the adjustment knobs 45 and 46 while being pressed against the teeth 43a and 44a of the switch operation members 43 and 44. For this reason, the switch operation members 43 and 44 also rotate in synchronization with them. Accordingly, in this case, the protruding pieces 43b and 44b of the switch operating members 43 and 44 rotate by the same amount as the adjustment knobs 45 and 46, respectively. When the adjustment knobs 45 and 46 are returned in this state, the external gears 47 and 48 are pressed against the back surfaces of the second bevel gears 54 and 55 as shown in FIG. The portions 47c and 48c are fitted so as to be positioned around the support protrusions 54a and 55a.

  Next, when the adjustment knobs 45 and 46 are rotated in a state where the holes 47c and 48c and the support protrusions 54a and 55a are fitted, the center P of the external gears 47 and 48 is the center of the switch operation members 43 and 44. In this case, the inner walls of the holes 47c and 48c of the external gears 47 and 48 are in contact with the peripheral surfaces of the support protrusions 54a and 55a. , Without rotating in synchronization with the rotating operation of the adjusting knobs 45, 46, it rotates relative to the switch operating members 43, 44, and the tooth portions 47a, 48a of the external gears 47, 48 and the tooth portions 43a, 44a of the switch operating members 43, 44 The meshing with 44a shifts. As a result, every time the external gears 47, 48 revolve around the center Q of the switch operation members 43, 44, the switch operation members 43, 44 differ in the number of teeth from the external gears 47, 48, in this embodiment. Rotate one tooth. Accordingly, since the rotation amount of the switch operation members 43 and 44 is significantly smaller than the rotation amount of the adjustment knobs 45 and 46, the initial positions of the projecting pieces 43b and 44b of the switch operation members 43 and 44 can be finely controlled. Fine adjustment of the winding limit position or the rewinding limit position can be performed very easily.

FIG. 1 is a schematic plan view showing a greenhouse film opening / closing device according to one embodiment of the present invention. FIG. 2 is a rear view showing the greenhouse film opening / closing device according to the embodiment. FIG. 3 is a diagram showing a moving mechanism used in the greenhouse film opening / closing device of the embodiment. FIG. 4 is a diagram showing an appearance of a control unit used in the greenhouse film opening / closing device of the above embodiment. FIG. 5 is a diagram showing the inside of the control unit used in the greenhouse film opening / closing device of the embodiment. FIG. 6 is a front view of FIG. FIG. 7 is a view taken along line AA in FIG. FIG. 8 is a diagram for explaining the operation of the above-described embodiment, and is a diagram showing an arrangement relationship of the switch operation member, the external gear, and the support protrusion. FIG. 9 is a diagram illustrating the appearance of the adjustment knob. FIG. 10 is a cross-sectional view showing a state in which the hole portion of the external gear is positioned around the support projection of the second bevel gear. FIG. 11 is a cross-sectional view showing a state in which the adjustment knob is pulled forward and the hole of the external gear is detached from the periphery of the support projection of the second bevel gear.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Greenhouse film opening / closing apparatus 10 Drive part 11 Motor 13 Tubular support shaft 20 Moving mechanism 21 Upper stage roller group 22 Lower stage roller group 21a, 22a Wheel 30 Winding shaft 40 Control part 41, 42 Limit switch 43, 44 Switch operation member 43a, 44a Tooth portion 45, 46 Adjustment knob 47, 48 External gear 47a, 48a Tooth portion 47c, 48c Hole portion 51 Worm 52 Worm wheel 53 First bevel gear 54, 55 Second bevel gear 54a, 55a Support protrusion

Claims (7)

In a greenhouse film opening and closing apparatus comprising a winding shaft that winds or unwinds a greenhouse film and opens and closes, and a drive unit that rotates the winding shaft,
A drive stop switch for stopping the drive of the drive unit;
It is provided with a projecting piece projecting outward, and has an internal gear having a tooth portion on the inner peripheral edge, and is rotated by a predetermined angle by driving of the drive unit, and the winding shaft is in a limit position or a winding direction of the greenhouse film. When the return direction limit position is reached, the protruding piece presses and switches the drive stop switch, and a switch operation member that stops the drive of the drive unit,
A tooth portion meshing with the switch operation member made of the internal gear is provided on the outer peripheral edge, the number of teeth is smaller than that of the switch operation member, and the center is located at a position eccentric to the center of the switch operation member; A reduction gear mechanism having an external gear having a plurality of holes formed at equal intervals along the circumferential direction inside the outer peripheral edge;
The switch has a small diameter portion whose center matches the center of the switch operating member, and a large diameter portion whose center matches the center of the external gear and is inserted into the central hole of the external gear. An initial position adjusting member for adjusting an initial position by rotating the operating member at an arbitrary angle, and adjusting a timing of a switching operation by the switch operating member;
A plurality of support projections formed on a drive transmission gear for transmitting rotation of the drive unit, and having an outer diameter smaller than the inner diameter of the hole of the external gear;
With
When the initial position adjusting member is rotated in a state where the support protrusions are inserted in the holes of the external gear, the external gear revolves around the center of the switch operation member, and every revolution, A greenhouse film opening / closing device having a structure in which the switch operating member is rotated by a difference in the number of teeth from the external gear . When the initial position adjustment member is rotated in a state where each hole of the external gear is detached from the support protrusion, the external gear and the switch operation member are synchronized with the rotation operation of the initial setting position adjustment member. The greenhouse film opening / closing device according to claim 1, wherein When the drive unit is driven to rotate the winding shaft, the support protrusion is located in each hole of the external gear, and the drive transmission gear is rotated by driving the drive unit. The greenhouse film opening and closing device according to claim 1 or 2, wherein the external gear and the switch operating member rotate synchronously through the support protrusion . The drive stop switch is provided for a greenhouse film winding direction limit position and a rewinding direction limit position, and the switch operation member, the initial position adjustment member, and the reduction gear mechanism are respectively driven. The greenhouse film opening / closing device according to any one of claims 1 to 3 , which is provided corresponding to a stop switch. The greenhouse film opening / closing device according to any one of claims 1 to 4 , wherein the drive stop switch is a limit switch. Along with the opening and closing operation of the greenhouse film by the winding shaft, further comprising a moving mechanism attached to the driving unit to move the driving unit along the guide rod-shaped member,
The moving mechanism has an upper roller group and a lower roller group disposed at a predetermined interval along the moving direction,
The upper roller group and the lower roller group each include wheels arranged at three or more locations at substantially equal intervals along the circumferential direction so as to be able to contact the peripheral surface of the guide bar-shaped member. The greenhouse film opening / closing device according to any one of 1 to 5 . The greenhouse film opening / closing apparatus according to claim 6, wherein the wheels constituting the upper roller group and the lower roller group are respectively arranged at three substantially equal intervals along the circumferential direction.

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