JPH11289882A - Covering sheet opening and closing apparatus for greenhouse for culture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a covering sheet opening and closing apparatus for a greenhouse for culture, capable of approximately synchronously operating the movement of a sheet winding shaft and that of a driving gear, consequently causing hardly the damage of the apparatus and readily and smoothly winding and rewinding the sheet. SOLUTION: This apparatus is equipped with a guide strut 1 installed approximately in parallel with an opening and closing plane at one end side of the opening and closing plane and the rotation driving source of a winding shaft 4, comprises a driving gear 2 of the winding shaft 4 which is retained on the guide strut 1 and freely moves along the guide strut 1, a pulley 3 for connecting a driving shaft 25 of the rotation driving source to the winding shaft 4 and a wire 5 which is wound once on the winding face of the pulley 3 and supported at its both end sides so as to be provided with tension approximately at both end sides by a coil spring 51. The winding face 31 of the pulley 3 is formed in a tapered shape so as to make the wound amount of a sheet (s) on the winding shaft 4 changing with the movement coincident with the wound amount of the wire 5 on the winding face 31. The winding face 31 is provided with a spiral groove to be engaged with the wire 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cultivation house for vegetables, fruit trees, flowers and the like covered with a flexible sheet such as a vinyl sheet (hereinafter abbreviated as "vinyl house") for ventilation. And / or a cover sheet opening and closing device for a cultivation house for winding or rewinding a cover sheet (hereinafter, abbreviated as “sheet”) on a roof surface to open and close.

[0002]

2. Description of the Related Art Conventionally, as a switching device of such a mechanism, two types, a manual switching device and an automatic switching device, have been used.

[0003] For example, Japanese Utility Model Laid-Open No. 4-33349 (not shown) disclosed as an example of a manual system has a guide column disposed near a greenhouse substantially parallel to an opening and closing surface, and one end of a sheet. A driving device for driving the winding shaft mounted on the guide column is slidably held by the guide column. This drive device is provided with a crank-shaped handle for manual rotation, and is configured to transmit a rotational drive force from a drive shaft to the winding shaft via a gear box.
One end of a wire is wound around a drive shaft of the drive device, and is attached to an upper end of a guide column, and the drive device is suspended and supported.

[0004] The operation of such a configuration is that the sheet is wound and opened, or the sheet is rewound and closed by rotating the winding shaft by manually rotating the handle. At the same time, the driving device moves above the column as the wire is wound on the driving shaft, and moves below the column by its own weight as the wire is unwound from the driving shaft.

[0005] The automatic opening and closing device replaces the rotation source of the manual handle with a motor or the like, and has the same basic structure and operation.

[0006]

However, neither the manual operation nor the automatic operation is designed to take into account the increase or decrease of the sheet winding amount.

In other words, the winding diameter of the sheet wound around the winding shaft becomes so large that the thickness of the sheet is increased as the winding is performed. On the other hand, the winding amount (length) of the sheet increases, and the moving distance of the winding shaft increases. On the other hand, the winding of the wire that causes the movement of the drive unit is
The operation is performed by the winding shaft or the driving shaft itself connected to the winding shaft, and the moving distance of the driving device is substantially constant for one rotation of the driving shaft. Therefore, when the winding shaft is thickened, the moving speed of the driving device is slower than the moving speed of the winding shaft (= driving shaft).

Conversely, if the diameter of the winding portion of the moving wire is increased in advance, when the sheet is not wound much, the moving speed of the apparatus is faster than the moving speed of the winding shaft. It will be.

If the movement of the winding shaft (= drive shaft) and the movement of the driving device are not synchronized as described above, an excessive force is applied to the driving device to cause a failure, or the sheet may be wound in reverse. There was also a possibility.

[0010]

SUMMARY OF THE INVENTION Therefore, the present invention has been made in view of the above-mentioned problems, and enables the movement of the winding shaft of the sheet and the movement of the drive device to operate substantially synchronously. An object of the present invention is to provide a novel cover sheet opening / closing apparatus for a cultivation house, which aims to easily and smoothly realize winding and rewinding of a sheet without generation.

[0011]

To achieve the above object, the present invention is configured as follows. That is, a cultivation house covered with a flexible sheet such as a vinyl sheet, and a winding shaft attached to an edge portion of the sheet is taken up and moved,
Alternatively, in a cover sheet opening and closing device for a cultivation house that opens and closes a side surface and / or a roof surface by performing rewinding movement, a guide post disposed at one end of the opening and closing surface substantially in parallel with the opening and closing surface, and the winding shaft. A drive shaft that is held by a guide support and moves freely along the guide support; a pulley that connects the drive shaft of the rotary drive source to the winding shaft; one end of the pulley On the winding surface of
The other end is composed of a wire supported in the vicinity of the upper part of the guide column, and the amount of winding of the sheet around the winding shaft, which changes according to the movement, and the amount of winding of the wire on the winding surface substantially match. The winding surface of the pulley is tapered.

Alternatively, the cultivation house cover sheet opening / closing apparatus described above further comprises a guide post disposed at one end of the opening / closing surface substantially in parallel with the opening / closing surface, and a rotation driving source for the winding shaft. And a pulley for connecting the drive shaft of the rotary drive source and the winding shaft, and a winding surface of the pulley.
And a wire supported by applying tension to both ends of the guide post near both ends thereof, and the amount of winding of the sheet around the winding shaft, which varies with movement, The winding surface of the pulley is formed in a tapered shape so that the winding amount of the wire around the winding surface substantially matches.

A spiral spiral groove into which the wire can be fitted may be formed on the winding surface of the tapered pulley, or a spring means may be interposed in the wire, or the lower end may be formed at the lower end. A tension may be applied by applying a load.

[0014]

According to the above construction, the present invention operates as follows. That is, the outer diameter of the winding shaft, which increases or decreases due to the winding and rewinding of the sheet, is equal to the diameter of the portion where the wire wound around the spiral groove of the pulley is located, and the movement amount of the opening / closing device and the winding shaft is substantially equal Will do. The movement of the device is performed not only in the vertical direction but also in various angles such as an oblique direction and a horizontal direction.

As a result, smooth winding and unwinding are performed without applying excessive force to the apparatus. In addition, when the spiral groove is provided in the pulley, the wire is not shifted or entangled, and the apparatus can be moved more reliably.

Further, a spring means is interposed in the wire,
Alternatively, when a load is applied to the lower end, tension is always applied to the wire.

[0017]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view of a sheet opening and closing device for a greenhouse according to the present embodiment, FIG. 2 is an enlarged side view showing a pulley which is a main part of the present embodiment, and FIG. It is an outline perspective view showing the example of attachment of the seat opening and closing device of a house.

The seat opening / closing device (hereinafter, abbreviated as “this device”) of the greenhouse according to the present embodiment mainly includes a guide column 1, a driving device 2, a pulley 3, a winding shaft 4, a wire 5,
It is composed of

The guide post 1 is a long pipe made of a pipe made of metal, resin, or the like, which is erected substantially vertically in the vicinity of the open / close surface w of the greenhouse h. Attachment portions 11 of the wire 5 are arranged, and stoppers 12 for defining upper and lower limits are respectively attached above and below a position closer to the inside.

The driving device 2 includes a motor 22 as a driving source in a housing 21 and a gear mechanism 24 from an output shaft 23 thereof.
The drive shaft 25 extends from the housing 21 in the opening / closing surface direction through the housing 21, and the housing 21 includes at least three guide rollers 26, 26, 26 for holding the guide column 1. It is attached to the guide column 1 so that it can move up and down along the guide column 1 via the guide roller 26. In addition, the motor 22, the gear mechanism 24 in the drive device 2,
The arrangement configuration of the guide roller 26 is a well-known technique used in the above-described prior art, and is not a main part of the present invention, and thus a detailed description thereof will be omitted.

The pulley 3 is a means for connecting the drive shaft 25 extending from the drive device to the winding shaft 4 attached to the lower end of the sheet s on the open / close surface. The winding surface 31
Is formed in a tapered shape (frustum conical shape) having a predetermined length, and has a spiral groove (having a concave cross section enough to fit one wire described later) on its winding surface 31. Or thread groove)
32 are formed over a desired length. The tapered winding surface 31 is formed such that the diameter at one end is substantially equal to the diameter of the winding shaft 4 and the diameter is gradually increased from here at a constant taper angle θ. This taper angle θ is represented by t as the equivalent thickness of the sheet and p as one pitch of the spiral groove on the winding surface.
It depends on the setting of Arctan (t / p).

The wire 5 is wound once around the pulley 3 and bridges between the mounting portions 11 at the upper and lower ends of the guide column 1, and tension is applied at the lower end thereof by interposing a coil spring 51 as a spring means. doing. The tension may be applied by applying a load (in addition to the own weight of the driving device) to the lower end of the wire, although not shown, in addition to the spring means.

[0023]

Operation of the present embodiment With the above configuration, the present embodiment operates as follows. The initial state is when the winding shaft 4 is located at the lowermost end of the open / close surface w and the side surface of the greenhouse h is in the closed state. Here, when the motor 22 is started, a driving rotational force is applied to the winding shaft 4 via the driving shaft 25,
Starts ascending movement while winding the sheet s. At the same time, the wire 5 wound once is wound by the pulley 3 (to be wound and then sent out).
A lifting force acts on the driving device 2.

At this time, the wire 5 fitted and wound into the spiral groove 32 of the pulley 3 has an outer surface of a winding surface substantially matching the outer diameter of the winding shaft 4 which increases according to the winding amount of the sheet s. The wire 5 moves along the spiral groove 32 of the diameter portion without slipping due to the tension applied to the wire 5. For this reason, the moving speed of the winding shaft 4 along the opening / closing surface w is substantially equal to the winding speed of the wire 5 (that is, the rising speed of the driving device 2). Thus, the winding shaft 4 and the driving device 2 that sequentially wind the sheet s
Rises smoothly while maintaining the same horizontal positional relationship, and the opening / closing surface w is opened.

On the other hand, the closing of the opening / closing surface w can be achieved by winding the sheet s on the opening / closing surface w and winding the upper end of the winding shaft
Is performed by switching the transmission path of the gear mechanism 24 in the drive device 2 to rotate the drive shaft 25 in the reverse direction, thereby performing the operation opposite to the opening operation described above.

The range of movement of the driving device 2 is restricted by the stopper 12, whereby the upper end of the sheet s,
The position of the lower end is appropriately determined.

[0027]

[Possibility of Other Embodiments] In the above embodiment, the wire 5 is wound once around the winding surface 31 of the pulley 3, and is wound. In addition, as shown in FIG. To
The lower end of the wire 5 may be fixed to the small diameter side of the winding surface 31. In this case, the upward movement of the driving device 2 is performed by winding the wire 5 around the winding surface 31, but the downward movement is performed by the own weight of the driving device 2. In this case, a configuration is adopted in which a clutch mechanism or the like is added to the gear mechanism 24 of the drive device 2 to enable free rotation.

In the embodiment described above, the present apparatus is used for the opening / closing surface w provided on the side surface of the greenhouse h.
In addition, as shown in FIG. 3, it can be used on an inclined surface such as a roof surface or a ceiling surface or a horizontal surface. in this case,
The fact that the tension is applied to the wire 5 wound around the pulley 3 as a winding structure effectively works. That is, the pulley 3 and the wire 5 can move without slipping in any of the rotation directions of the drive shaft 25. Further, the stopper 12 and the mounting portion 11 may be arranged separately from the guide column 1.

In the structure of winding once around the winding surface of the pulley and winding it, as shown in FIG. 4A, an appropriate weight is suspended in place of the coil spring and the pulley is pulled through the pulley. It is also possible to apply tension to the wire to open and close the vinyl sheet.

Further, in the configuration in which the lower end of the wire 5 is fixed to the small diameter side of the winding surface 31, as shown in FIG. 4B, for example, a load 52 is applied to the housing 21 of the driving device 2 via a pulley 53. By suspending, the wire 5 can be tensioned and used on an inclined surface or a horizontal surface.

In addition, since the guide column 1 may be a track on which the driving device 2 is moved, two or more guide columns 1 may be provided, a solid rod may be provided, or the guide roller 26 of the driving device 2 may be used.
If a guide is used instead of the guide, the guide column can be a guide rail.

In the case where the side of the greenhouse h draws an arc, the guide column 6 may be formed in a curved shape so as to draw an arc (FIG. 5).

[0033]

As described above, according to the present invention, the winding surface of the pulley is tapered so that the winding amount of the sheet on the winding shaft and the winding amount of the wire on the winding surface change with movement. (Or winding amount)
The moving speed of the winding shaft along the opening / closing surface and the speed of the driving device can be made substantially equal. As a result, it is possible to move the winding shaft and the driving device extremely smoothly while maintaining the same positional relationship without applying excessive force to the driving device as in the related art.

Furthermore, since the spiral groove is provided on the winding surface of the pulley, the wire can be more reliably moved without causing displacement or entanglement of the wire. Furthermore, according to the present invention, since the moving direction of the device is not limited to the vertical direction, it can be performed at various angles such as an oblique direction and a horizontal direction.
The industrial effect is remarkable, for example, the range of application to a switchgear is greatly expanded compared to a conventional device.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a greenhouse seat opening and closing device according to an embodiment.

FIG. 2 is an enlarged side view showing a pulley, which is a main part of the embodiment.

FIG. 3 is a schematic perspective view showing an example of mounting a sheet opening / closing device for a greenhouse according to the present embodiment.

FIG. 4 is a schematic perspective view showing another embodiment.

FIG. 5 is a schematic perspective view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide support | pillar 11 Mounting part 12 Stopper 2 Drive 21 Housing 22 Motor 23 Output shaft 24 Gear mechanism 25 Drive shaft 26 Guide roller 3 Pulley 31 Winding surface 32 Spiral groove 4 Roller shaft 5 Wire 51 Coil spring 52 Load 53 Pulley 6 Guide support (curved ~)

Claims (4)

[Claims] 1. A cultivation house covered with a flexible sheet such as a vinyl sheet, wherein a winding shaft attached to an end portion of the sheet is wound or unwound to move the side surface and / or unwind. A cultivation house covering sheet opening / closing device that opens and closes a roof surface, comprising: a guide post disposed at one end of the opening / closing surface substantially in parallel with the opening / closing surface; and a rotation drive source for the winding shaft. And a pulley for connecting the drive shaft of the rotary drive source and the winding shaft, one end of which is attached to the winding surface of the pulley, and the other end of which is a guide. And a wire supported near the upper portion of the support column, and the pulley is moved so that the winding amount of the sheet around the winding shaft, which changes with movement, and the winding amount of the wire on the winding surface substantially coincide with each other. That the winding surface is tapered Cover sheet switchgear cultivation house to symptoms. 2. A cultivation house covered with a flexible sheet such as a vinyl sheet or the like, wherein a side surface and / or ( A cultivation house covering sheet opening / closing device that opens and closes a roof surface, comprising: a guide post disposed at one end of the opening / closing surface substantially in parallel with the opening / closing surface; and a rotation drive source for the winding shaft. A winding shaft driving device that freely moves along a guide column, a pulley that connects the driving shaft of the rotary drive source and the winding shaft, and a single or several winding around the winding surface of the pulley. And a wire supported on both ends of the guide column with tension applied near both ends thereof, and the amount of sheet winding on the winding shaft, which varies with movement, and winding of the wire on the winding surface. Winding of the pulley so that the Cover sheet switchgear cultivation house, characterized in that the formation of the surface in a tapered shape. 3. A winding surface of a tapered pulley,
The cultivation house covering sheet opening / closing device according to claim 1 or 2, wherein a helical spiral groove to which a wire can be fitted is formed. 4. A cultivation house covering sheet opening and closing according to claim 1, wherein a tension is applied by interposing a spring means on the wire or by applying a load to the lower end. apparatus.