JP2002027843A - Sheet-extending apparatus of plastic greenhouse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation system of a plastic greenhouse enabling smooth opening and closure of a sheet independent of the angle of the sheet- extending site and preventing the damage of the sheet by the interference with a sheet-pressing part, preventing the generation of wrinkle and sagging, free from the trouble of the inclusion of dust, etc., in the wound sheet and preventing the distortion of a rotary shaft. SOLUTION: A rotary shaft 6 is placed on the side wall, roof or gable face of the plastic greenhouse B in a state freely movable in vertical direction. An upper belt 9 and a lower belt 10 are wound on one or plural parts of the rotary shaft in opposite winding direction. The base ends of the upper belt and the lower belt are fixed to respective fixing members placed on the frame of the plastic greenhouse or on the ground. Attaching members 11, 11a are engaged with several arbitrary parts of the rotary shaft in a state to allow the free rotation of the shaft and a tip end of the sheet 3 having fixed base end is fixed to the attaching members.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a greenhouse sheet spreading device which is provided on a side surface, a roof surface or a wife surface of a greenhouse and is suitable for ventilating the inside of the greenhouse.

[0001]

2. Description of the Related Art Generally, in a greenhouse, a ventilation device, a light-shielding sheet, and a net for insect repelling are provided on the side or the roof of the greenhouse in order to adjust the temperature and humidity in the greenhouse so that the plants can grow properly. It is normal that there is.

[0002] As a ventilation device on the side of a greenhouse, for example, the lower end of a sheet suspended from the roof side or shoulder of a greenhouse is wound around a rotating shaft, and the sheet is wound upward from near the ground. This forms an opening below the side of the greenhouse.

In this case, a transparent synthetic resin sheet or a net-like net sheet is used as the sheet. The base end of this sheet is fixed to the frame on the roof side or the shoulder, and the lower end of the sheet is wound around a rotating shaft. It is normal that there is.

The rotating shaft is rotated manually or via a rotary driving member, and the opening is opened by winding the sheet around the rotating shaft, and the opening is closed by rewinding the sheet.

[0005]

The above-mentioned conventional ventilator can automatically open the opening by simply winding or rewinding the sheet only by rotating the rotating shaft. There is such a defect.

First, when the opening is opened by winding the sheet around the rotating shaft, the winding shaft can be relatively smoothly and slowly wound because the rotating shaft is pulled upward by the tension of the sheet. However, when rewinding from the upper side to the lower side, the free movement due to the weight of the rotating shaft and the bundle of wrapped sheets is added and the falling speed becomes faster, so that the manual operation cannot follow smoothly. Conversely, even when rewinding using this free motion, the position of the opening is a place with a gentle slope, a place where the slope is meandering, or a place near an obstacle such as a protrusion On the contrary, in some cases, the rotating shaft does not roll down smoothly, and the speed may be slowed down or stopped, and the operability is deteriorated.

Secondly, in order to prevent the sheet from fluttering in a greenhouse, a sheet holding member composed of a string, a band, or the like is provided, and the sheet is held up and wound up while holding the sheet with the sheet holding member. Since the sheet is returned, the sheet is rubbed by the sheet pressing member, and the sheet is worn, damaged, wrinkled, or sagged during long-term use.

Third, when the sheet is rolled up, dirt, dust, rainwater, snow, and the like attached to the sheet are rolled up together, so that the speed of rolling up and rewinding the sheet is reduced, the operability is poor, the sheet is dirty, and the sheet is dirty. It may cause damage to the device.

Fourth, since the rotating shaft is generally provided horizontally along the side surface, the roof surface, etc., the rotating shaft becomes longer in the case of a large house, and as a result, the rotating shaft is distorted by the weight of the seat, and the rotating shaft is uniformly rotated. The shaft cannot be rotated, and a large rotation operation is required. If the forcibly rotated rotating shaft is rotated, the sheet is not uniformly wound, and wrinkles may be generated, and the skeleton of the house may be deformed due to the distortion of the rotating shaft.

Accordingly, an object of the present invention is to enable the opening and closing of the sheet smoothly regardless of the angle of the seat extension position, and to prevent the sheet from being damaged due to interference with the sheet holding member, and the occurrence of wrinkles and slackness. An object of the present invention is to provide a ventilation device for a greenhouse, which can prevent the occurrence of dust and the like and prevent the occurrence of distortion of the rotating shaft.

[0011]

Means for Solving the Problems To achieve the above object, a means of the present invention is to dispose a rotatable rotating shaft on a side surface, a roof surface or a wife surface of a greenhouse so as to be movable vertically. Then, the upper belt and the lower belt are wound around one or more locations of the rotating shaft in opposite directions, and the base ends of the upper belt and the lower belt are fixed to a greenhouse frame or a fixing member provided on the ground, respectively. In addition, the mounting member is connected to the rotating shaft at any desired positions while allowing the rotating shaft to freely rotate, and the mounting member is fixed to the leading end of a sheet having a fixed base end.

In this case, one end or both ends of the rotary shaft are connected to a rotary drive source via a link that can be raised and lowered and a universal joint.

[0013] Similarly, the upper belt and the lower belt are preferably made of bands or strings.

Similarly, the base end of the lower belt is a spring,
It is preferably connected to the fixing member via an elastic material such as a rubber band.

[0015] Similarly, it is preferred that the mounting member comprises a ring, a hook, a pipe or a packer.

Similarly, the mounting member is constituted by a crank arm rotatably fitted to the rotating shaft, and a long frame having a narrow opening portion connected to the crank arm, and the front end of the seat has an elastic locking line. It may be made to be fixed in a long frame via a long frame.

Similarly, the sheet may be any one of an expansion sheet laid on a skeleton, a ventilation sheet for opening and closing an opening, a light-shielding sheet for blocking sunlight, and an insect-proof sheet.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention used as a ventilation device will be described below with reference to the drawings.

FIGS. 1 to 5 show a ventilating apparatus according to an embodiment of the present invention and a greenhouse using the same.

The ventilation device 1 in the greenhouse B shown in FIG. 1 is provided on the side surface of the greenhouse B along the longitudinal direction. However, this ventilation device may be provided on the roof surface side or the wife side.

The ventilator 1 opens the opening 2 provided on the side surface from above to below when the ventilation sheet 3 descends, and closes it from below to above. However, conversely, it may be opened upward from below and closed downward from above.

The greenhouse B has an arched pipe 4 as a skeleton and a transparent synthetic resin sheet fixed on the outer surface of the arched pipe 4 via a dovetail frame 5.

The ventilator 1 has a rotating shaft 6 and a ventilation sheet 3 connected to the rotating shaft 6, and the rotating shaft 6 is manually operated by a handle 7.
Alternatively, it is driven by a driving member 8 that is rotationally driven via another link and a universal joint.

Next, the ventilation device 1 will be described in detail.

As shown in FIGS. 2 and 3, the ventilator 1 has a rotatable rotating shaft 6 driven by a driving member 8 on a side surface of a greenhouse B so as to be movable in a vertical direction. are doing. The lower end of the upper belt 9 and the upper end of the lower belt 10 are wound around one or a plurality of positions of the rotating shaft 6 in directions opposite to each other, and the ends of the upper belt 9 and the lower belt 10 are skeletons of the greenhouse B, respectively. It is fixed to the dovetail frame 5 or other cross member and a fixing member on the ground.

Further, the rotating shaft 6 is provided at arbitrary plural positions of the rotating shaft 6.
The attachment member 11 is coupled while allowing the free rotation of
A sheet fixing member 12 composed of a dovetail frame along the rotating shaft 6 is connected to the mounting member 11, and the upper end of the ventilation sheet 3 to which the lower frame 13 is fixed is fixed to the sheet fixing member 12. ing.

The upper belt 9 has, for example, its tip wound counterclockwise around the rotation shaft 6 and its lower belt 10 wound clockwise.

In this case, when the opening 1 in which the ventilation sheet 3 is pulled up to the uppermost stage is fully closed, the upper belt 9 is fully wound up and the lower belt 10 is fully unwound. Conversely, when the opening is fully opened, the entire upper belt 9 is rewound,
The lower belt 10 is fully wound. At the intermediate position, the winding amount of the upper belt 9 and the lower belt 10 are equal, and the diameter of the bundle of belts wound around the rotating shaft 6 is equal.

The upper belt 9 and the lower belt 10 may be wound in any direction as long as they are opposite to each other, but as shown in the figure, the outer surfaces of the belts 9 and 10 are in contact with the back of the sheet fixing member 12 and It is preferable to push it into the side.

The base end of the lower belt 10 may be fixed to a lower frame 13, a lower fixing pipe 14 shown in the figure, or an anchor bolt on the ground, etc. As shown in FIG. It is preferable to connect with the spring 14 and pull down with a spring 15 to apply an initial tension. Thereby, the upper belt 9 and the lower belt 10 are always
The rotating shaft 6 is pulled in the mounting direction by the upper and lower belts 9 and 10 so as to be balanced, and the rotating shaft 6 is always kept horizontal over its entire length to cause distortion. Is prevented.

FIGS. 1 and 2 show a state in which the opening 2 is almost half opened. For example, when the rotating shaft 6 is rotated clockwise through the driving member 8 manually from this position, the upper part is opened. The belt 9 is further wound around the rotating shaft 6, and the lower belt 10 is rewound.

For this reason, the rotating shaft 6 rises while rotating by the upper belt 9, and the mounting member 11 and the sheet fixing member 1 are rotated.
The ventilation net 3 is pulled upward through the opening 2 to close the opening 2 above. Conversely, when the rotating shaft 6 is rotated in the counterclockwise direction, the lower belt 10 is wound around, the upper belt 9 is rewound, and the rotating shaft 6 is lowered by being pulled by the lower belt 10 and rotating. It descends while sagging and opens further below the opening 2.

A house band 17 is spread on the greenhouse B, and the ventilation sheet 3 is
While being supported by 7, it can be prevented from always moving in the direction and expanding outward. In this case, even if the ventilation sheet 3 is in contact with the house band 17, it is not necessarily pressed strongly, so that damage due to friction is prevented.

As shown in the figure, when the ventilator 1 is installed so that the opening 2 is opened from the upper side to the lower side of the ventilation sheet 3, the lower part of the opening 2 is always closed by the ventilation sheet 3. Thus, the seedlings of the small plants that are growing are not cooled, so that it is possible to prevent the growth of these seedlings from being adversely affected.

The rotary shaft 6 is driven via a handle 7. One or both ends of the rotary shaft 6 are connected to a rotary drive source (not shown) via a universal joint and a vertically movable link. May be. Further, although the upper belt 9 and the lower belt 10 are formed by wide bands as shown in the figure, they may be made of a string. Further, the base end of the lower belt 10 is connected to the spring 15, but may be connected to a fixing member via an elastic material such as a rubber band.

Further, the mounting member 11 may be formed of a ring, hook, pipe or packer. For example,
A member as shown in FIGS. 5, 6, and 7 may be used.

The mounting member 11 shown in FIG. 5 comprises a crank arm 18 rotatably fitted to the rotating shaft 6 and a sheet fixing member 12 formed of a long frame having a narrow opening and connected to the crank arm 18. The tip of the ventilation sheet 3 is fixed in the long frame via an elastic locking line. The crank arm 18 includes a boss 18a, an arm 18b integrated with the boss 18a, and an arm 18b.
Of the arm 18b.
The sheet fixing member 12 is connected to a front surface of the sheet fixing member 12 via a groove 18c and a receiving member 19.

FIG. 5 shows the sheet fixing member 12 connected downward, while FIG. 6 shows the case where the crank arm 18 is mounted in reverse and the sheet fixing member 12 is connected upward. In this case, the crank arm 18 is supported by the arch pipe 4 via the ring 20 so as not to fall. The operation and effect are the same as those of the mechanisms shown in FIGS.

The mounting member 11a shown in FIG. 7 comprises a ring 20 inserted into the rotary shaft 6 and a hook 21 suspended from the ring 20, and a hole 3a formed in an eyelet shape at the end of the ventilation sheet 3.
Is hooked on the hook 21.

In this case, the ventilation seat 3 moves up and down via the ring 20 and the hook 21 as the rotating shaft 6 moves up and down.

Although the above-described embodiment describes a ventilation device, the sheet spreading device of the present invention can be used for spreading a spreading sheet covering the entire greenhouse by using the same structure. In addition, it can be used to spread a sheet to be stacked on a sheet that has been spread in advance, or to spread a light-shielding sheet that blocks sunlight, a sheet for curtains, or a sheet for insect repellent that prevents pests from entering through openings. Needless to say.

[0042]

According to the present invention, the following effects can be obtained.

(1) According to the invention of each claim, the upper belt and the lower belt are wound around the rotating shaft and pulled in opposite directions, and when the rotating shaft is rotated, one of the belts rises above the rotating shaft. Or pull it down. For this reason, regardless of the installation location of the ventilation opening or the angle of the seating position, if the rotating shaft rotates at a constant speed, it will move up and down, so the ventilation operation can be smoothly and reliably opened and closed. .

(2) Similarly, since the sheet is moved up and down by being pulled by the mounting member, the sheet does not come into strong contact with a sheet holding member such as a house band, and damage to the sheet, generation of wrinkles and slack can be prevented.

(3) Similarly, since the sheet is not involved in the rotating shaft, dirt, dust, rainwater, snow and the like are not involved in the sheet, and the sheet is not stained or damaged.

(4) Similarly, since the rotating shaft is uniformly supported while being pulled up and down by the upper belt and the lower belt, even if a long rotating shaft is used, distortion and deformation of the rotating shaft are prevented. As a result, damage to the ventilation system, deformation of the greenhouse frame, and the like can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a greenhouse using a sheet stretching device according to an embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view of FIG.

FIG. 3 is a partially enlarged front view of FIG. 1;

FIG. 4 is a partially enlarged side view of FIG. 1;

FIG. 5 is an enlarged perspective view of a mounting member.

FIG. 6 is an enlarged perspective view of another mounting member.

FIG. 7 is an enlarged perspective view of another attachment member.

[Explanation of symbols]

 Reference Signs List 3 seat 6 rotating shaft 9 upper belt 10 lower belt 11, 11a mounting member 15 spring 18 crank arm B greenhouse

Claims (7)

[Claims] 1. A rotatable rotary shaft is movably disposed along a vertical direction on a side surface, a roof surface, or a wife surface of a greenhouse, and an upper belt and a lower belt are mutually attached at one or more rotary shafts. Wrap in the opposite direction, fix the base ends of the upper belt and the lower belt to the frame of the greenhouse or the fixing member provided on the ground, respectively, and allow free rotation of the rotating shaft at any number of places on the rotating shaft. A sheet expanding device for a greenhouse, wherein a mounting member is connected to the mounting member while a base end of the sheet is fixed to the mounting member. 2. The greenhouse sheet spreading device according to claim 1, wherein one or both ends of the rotary shaft are connected to a rotary drive source via a link that can be raised and lowered and a universal joint. 3. The greenhouse sheet stretching apparatus according to claim 1, wherein the upper belt and the lower belt are formed of bands or strings. 4. The greenhouse sheet spreading apparatus according to claim 1, wherein the base end of the lower belt is connected to a fixing member via an elastic material such as a spring or a rubber band. 5. The greenhouse sheet spreading apparatus according to claim 1, wherein the mounting member comprises a ring, a hook, a pipe, or a packer. 6. A crank arm in which a mounting member is rotatably fitted to a rotating shaft, and a long frame having a narrow opening connected to the crank arm, and a front end of the seat is provided with an elastic locking line. 4. The greenhouse sheet spreading device according to claim 1, wherein the fixing device is fixed in a long frame. 7. The sheet according to claim 1, wherein the sheet is any one of a spreading sheet that is spread on a skeleton, a ventilation sheet that opens and closes an opening, a light-shielding sheet that blocks sunlight, and an insect-proof sheet. 4 or 5 greenhouse sheet stretching equipment.