JP6836772B2 - Vinyl house ventilation system - Google Patents

Description

The present invention relates to a vinyl greenhouse ventilator for ventilating by opening and closing a window (hereinafter referred to as a side window) provided on a side surface of an agricultural greenhouse.

Agricultural greenhouses (hereinafter also referred to as houses) are for cultivating crops such as vegetables and flowers inside them, and their main purpose is to keep the crops warm and to protect the crops from rainfall. However, if it is always sealed with vinyl, it often becomes hot enough to adversely affect the crops even in winter in fine weather. Therefore, a window that can be opened and closed is provided on the side surface of the house, and the temperature inside the house is lowered to the same level as the outside air temperature by ventilating the outside air by opening the window when the temperature is high.

The most widely used method for opening and closing the side of the house is as follows. Non-Patent Document 1 discloses a typical example of the conventional opening / closing method of the side surface of the house, which will be described below with reference to the drawings. FIG. 13 is a perspective view when the side window of the vinyl house equipped with the conventional vinyl house ventilation device is half-opened, and FIG. 14 is a view showing the side window of the vinyl house equipped with the conventional vinyl house ventilation device fully closed. It is a perspective view of time. The side window of the vinyl house refers to an open portion on the side surface of the vinyl house. In FIG. 13, the dovetail frame 7 for fixing the opening / closing sheet located at the upper part of the side surface of the house, the left side surface end covering film 15a, and the right side surface end portion. The side window is a portion surrounded by the coating film 15b and the dovetail frame 14 for fixing the hem film located at the lower part of the side surface of the house. The side window can be opened and closed by covering the side window with the opening / closing sheet 2 and winding the opening / closing sheet 2 on the take-up rod 3 or rewinding the opening / closing sheet 2 from the take-up rod 3. As shown in FIGS. 13 and 14, the upper side of the opening / closing sheet 2 is fixed to the dovetail frame 7 horizontally installed on the shoulder of the house by an elastic system stop line (not shown), and the opening / closing sheet 2 The lower side is fixed to a cylindrical or columnar take-up rod 3. A take-up handle 8 (or a rotation drive device) is connected to the take-up rod 3 so that the take-up rod 3 can rotate. When the take-up rod 3 is rotated by using the take-up handle 8, the open / close sheet 2 is taken up by the take-up rod 3, and when the take-up rod 3 is rotated in the reverse direction, the open / close sheet 2 is rewound. As shown in FIG. 13, when the side window of the house is half-opened, the portion below the take-up rod 3 is open. At the lower part of the window on the house side, the hem film 13 is installed up to a height of about 30 cm above the ground. As shown in FIG. 14, when the side window of the house is fully closed, the opening / closing sheet 2 is rewound and the take-up rod 3 is located near the ground surface. When opening the side window, the take-up rod 3 is rotated to wind the opening / closing sheet 2 around the take-up rod 3. When the side window is fully opened, almost all of the opening / closing sheet 2 is wound around the take-up rod 3, and the take-up rod 3 is located about 30 cm below the dovetail frame 7.

However, in the case of this method, as shown in FIG. 14, since the take-up rod 3 is located near the ground surface when the side window is fully closed, the take-up rod 3 and the take-up rod 3 are used in cold regions such as the Tohoku region where there is a lot of snow in winter. It often happens that the take-up handle is buried in snow or frozen in thaw water and cannot be opened quickly when it needs to be released.

Further, as shown in FIG. 14, since the take-up rod 3 is located near the ground surface when the side window is fully closed, dust such as rainwater, snow, and dead leaves adheres to the joint portion between the take-up rod 3 and the opening / closing sheet 2. However, since these are caught in the winding, it becomes difficult to open and close, and there is a problem that the opening / closing sheet 2 becomes dirty and damaged.

Alternatively, the lower side of the open / close sheet is fixed to the lower side of the side window of the house, the upper side of the open / close sheet is fixed to a vertically movable frame, and the side window is closed by raising this frame, and the frame is lowered. A device for opening a side window by allowing the side window to open has been proposed (Patent Document 1). In this method, since the movable frame is located on the shoulder of the house when fully closed, it is considered that the movable frame is hardly buried in the snow and freezes when snow is accumulated. However, with this device, when the side window is opened, the opening and closing sheet becomes loose and folded due to its own weight, rainwater collects between the folded sheets, algae grow there, and dust such as dead leaves adheres to it. , It is possible that the opening / closing sheet becomes dirty. Further, in this vertically movable frame method, a mechanism for raising and lowering the movable frame and fixing it at an arbitrary opening degree is required, and the number of parts is large and complicated.

As yet another method, the lower side of the opening / closing sheet is fixed to the lower side of the side window of the house, the upper side of the opening / closing sheet is fixed to the take-up rod, and when the side window is fully closed, the take-up rod is the upper side of the side window of the house. A device has been proposed that opens the opening / closing sheet from the upper side of the window on the house side by winding it on a take-up rod (Patent Document 2). In this device, in order to prevent the take-up rod from falling naturally due to its own weight and the weight of the open / close sheet taken up, the take-up rod is pulled upward to support it, so that the extension body, roller support post, roller and weight It has a mechanism consisting of. Even with this device, since the take-up rod is located on the upper side of the side of the house when the side window is fully closed, there is little risk that the take-up rod will be buried in the snow even when it is covered with snow. However, the mechanism for pulling the take-up rod upward is complicated, which hinders its widespread use.

Japanese Unexamined Patent Publication No. 2002-2743 Japanese Unexamined Patent Publication No. 2005-318824

"House full understanding reader Vol1 that understands the basics of greenhouses correctly", Watanabe Pipe Co., Ltd., 2011, pp. 68-69

The problem to be solved by the present invention is that there is no fear that the switchgear will not be able to be opened quickly when necessary due to being buried in snow or freezing in a normal amount of snow, and water, snow ice, and dust are collected in the winding portion. It is a vinyl greenhouse ventilator that does not get caught in the vinyl house, and the mechanism is as simple as possible.

The ventilation device of the vinyl house according to the first invention includes an opening / closing sheet for opening / closing the side window of the vinyl house and a take-up rod for winding the opening / closing sheet, and the side window of the vinyl house is closed by the opening / closing sheet. In the closed state, the opening / closing sheet has a surplus portion that is folded back at the folding point on the ground surface and faces upward inside the vinyl house, and has a weight that pulls the opening / closing sheet downward at the folding point, and the surplus opening / closing sheet. It is characterized in that it is provided with a take-up rod supporting means for supporting the take-up rod whose portion is wound up at a certain height from the ground surface.

In the first invention, the ventilation device of the vinyl house according to the second invention is a take-up rod support pillar having a take-up rod support portion in which the take-up rod supporting means is installed on an extension line of the side surface of the vinyl house. The winding rod support portion of at least two winding rod support columns supports the winding rod by winding the excess portion of the opening / closing sheet.

In the first invention, the ventilation device of the vinyl house according to the third invention is a take-up rod support in which the take-up rod support means is fixed to the structure of the vinyl house, and the take-up rod support is the take-up rod support. It is characterized by having a roller.

In the first invention, the greenhouse ventilator according to the fourth invention is a rectangular fixture in which the take-up rod supporting means supports the take-up rod and the weight, and supports the take-up rod. It has a take-up rod support belt, supports the take-up rod and the weight with at least two fixtures, and one end side of the take-up rod support belt is fixed to the take-up rod, and other than the take-up rod support belt. The end side is characterized in that it is fixed to the structure of the vinyl house.

In the first to third inventions, the opening / closing sheet of the ventilation device of the vinyl house according to the fifth invention is formed by connecting an insect-proof net and a transparent film, and the end of the insect-proof net is a side window of the vinyl house. It is fixed to the upper end portion of the transparent film, and the end portion of the transparent film is fixed to the take-up rod.

Since the ventilation device of the vinyl house according to the present invention is provided with a take-up rod supporting means for supporting the take-up rod at a certain height from the ground surface when the side window is fully closed, it can be taken up with a small amount of snow. The part is not buried in the snow. In addition, since the surplus part of the opening / closing sheet folded back at the folded part of the ground surface is located inside the vinyl house, the surplus part of the opening / closing sheet freezes when the temperature inside the greenhouse rises and ventilation is required. There is no water, snow and ice, and there is no adhesion or entrainment of dust.

In a vinyl greenhouse with a long side, when the take-up rod is supported only at two points at both ends, the central part of the take-up rod tends to bend downward due to its own weight. If the take-up rod bends, it becomes difficult to take up and rewind the opening / closing sheet. Since the ventilation device of the vinyl house according to the present invention is provided with a take-up rod support or a take-up rod support belt at one place in the middle of the take-up rod or at several places as needed, the take-up rod is bent. It prevents it from swelling.

In the first to third inventions, the height of supporting the take-up rod by the take-up rod supporting means is set to be substantially the same as the upper end of the side window of the vinyl house, so that the side window is doubled when fully closed. It can be covered and the heat retention in severe cold can be improved.

In the fifth invention, the side window of the vinyl house is closed with a transparent film in the low temperature period to keep the vinyl house warm, and the side window of the vinyl house is covered with an insect-proof net in the high temperature period when there are many harmful insects. It is possible to prevent harmful insects from invading the greenhouse while keeping the inside temperature at the same level as the outside temperature.

It is considered that the ventilation device of the vinyl house according to the present invention has a relatively simple mechanism and a relatively low manufacturing cost.

FIG. 1 is a perspective view when the side window of the vinyl house is fully closed in one embodiment of the vinyl house ventilation device of the present invention. FIG. 2 is a perspective view when the side window of the vinyl house is half-opened in an embodiment of the vinyl house ventilation device of the present invention. FIG. 3 is a partial end view showing the relationship between the take-up rod, the take-up rod support, the weight, and the opening / closing sheet when the side window of the vinyl house is half-closed in an embodiment of the vinyl house ventilation device of the present invention. is there. FIG. 4 is a front view of the take-up rod support according to an embodiment of the vinyl house ventilation device of the present invention. FIG. 5 is a plan view of a take-up rod support according to an embodiment of the vinyl house ventilation device of the present invention. FIG. 6 is a perspective view when the side window of the vinyl house is fully closed in another embodiment of the vinyl house ventilation device of the present invention. FIG. 7 is a perspective view when the side window of the vinyl house is half-opened in another embodiment of the vinyl house ventilation device of the present invention. FIG. 8 is a partial end view showing the relationship between the take-up rod, the weight, the take-up rod support belt, and the opening / closing sheet when the side window of the vinyl house is half-opened in another embodiment of the vinyl house ventilation device of the present invention. is there. FIG. 9 is a perspective view when the side window of the vinyl house is fully closed in still another embodiment of the vinyl house ventilation device of the present invention. FIG. 10 is a perspective view when the side window of the vinyl house is fully closed in still another embodiment of the vinyl house ventilation device of the present invention. FIG. 11 is a perspective view of still another embodiment of the greenhouse ventilation device of the present invention, in which the side windows of the vinyl house are covered only with the insect repellent net constituting the opening / closing sheet. FIG. 12 is a perspective view showing an embodiment of a take-up handle and a take-up handle guide pillar connected to a take-up rod in the vinyl house ventilation device of the present invention. FIG. 13 is a perspective view when the side window of a vinyl house equipped with a ventilation device of a conventional vinyl house is half-opened. FIG. 14 is a perspective view when the side window of a vinyl house equipped with a ventilation device of a conventional vinyl house is fully closed.

Next, an embodiment of the present invention will be described with reference to the drawings, but it goes without saying that various changes and modifications can be made without departing from the technical scope of the present invention.

1 and 2 are perspective views of a first embodiment of the ventilation device of the vinyl house 1 according to the present invention. FIG. 1 shows a state in which the side window of the vinyl house is fully closed, and FIG. 2 shows a state in which the side window of the vinyl house is half open. In FIG. 2, the side windows in the present invention are the dovetail frame 7 for fixing the opening / closing sheet located at the upper part of the side surface of the vinyl house 1 and the dovetail frame 14 for fixing the hem film located at the lower part of the side surface of the vinyl house 1. It is the sandwiched part. As shown in FIG. 1, one end of the opening / closing sheet 2 is fixed to the dovetail frame 7 fixed to the frame of the vinyl house 1 by an elastic stop wire (not shown) or the like, and the other end of the opening / closing sheet 2 is fixed. Is fixed to the take-up rod 3 by a plastic greenhouse packer (not shown) or the like. A vinyl chloride resin sheet or a polyolefin resin sheet, which is generally used for coating agricultural greenhouses, is suitable as the material of the opening / closing sheet 2, but it is used for coatings other than openings such as roofs and end faces of vinyl houses. It may be made of the same material as the sheet used. A hem film 13 is stretched to the lower part of the side surface of the vinyl house 1, the upper end of the hem film 13 is fixed to the dovetail frame 14 for fixing the hem film, and the lower end of the hem film 13 is the ground. It is embedded in. Although only the opening / closing sheet 2 of one side window of the vinyl house 1 is shown in FIG. 1, the opening / closing sheet having the same configuration as that shown in FIG. 1 is also arranged in the other side window on the opposite side of the vinyl house 1. Has been done. Further, the opening / closing sheet arranged on the other side window on the opposite side of the vinyl house 1 also has an opening / closing mechanism having the same configuration as that described in the following paragraphs [0024] to [0046].

The take-up rod 3 is a cylinder or cylinder having a diameter of about 20 mm and a length of about 50 cm longer than the length of the side window of the vinyl house 1, and the material is preferably a metal such as iron or aluminum or a synthetic resin such as vinyl chloride. .. One end of the take-up rod 3 is connected to the take-up handle 8. The take-up handle guide pillar 9 is vertically erected at a position about 50 cm away from the vinyl house 1 on the extension line of the side surface of the vinyl house 1. As shown in FIG. 12, the take-up handle 8 has a hole penetrating up and down, and the take-up handle 8 is fitted to the take-up handle guide pillar 9 through this hole. One end of the take-up rod 3 is connected to the take-up handle 8, and while the take-up handle 8 rotates the take-up rod 3, the take-up handle 8 is guided by the take-up handle guide pillar 9 and can freely move up and down. You can move to.

The take-up handle 8 and the take-up handle guide pillar 9 are devices for easily rotating the take-up rod 3, but the device for easily rotating the take-up rod 3 is not limited to this. Various known techniques such as a type for connecting a rotary drive device can be applied.

As shown in FIGS. 1 and 2, four take-up rod support columns 5 are installed on the left and right extension lines of the side surface of the vinyl house 1, for a total of four. Although only three take-up rod support columns 5 are shown in FIGS. 1 and 2, the other take-up rod support column 5 is hidden. Further, a take-up rod support portion 5-1 for mounting the take-up rod 3 is provided on one end of each take-up rod support pillar 5. In many cases, the height of the take-up rod support portion 5-1 at one end of the take-up rod support pillar 5 is about 50 cm, but it should be made higher if necessary, such as when installing in an area with a large amount of snow. .. From the state where the side window of the vinyl house 1 is fully closed to the state where the side window of the vinyl house 1 is opened to the height of the take-up rod support pillar 5, the take-up rod 3 is the take-up rod support pillar 5. It is mounted on the take-up rod support portion 5-1.

As shown in FIGS. 1, 2 and 3, the take-up rod support 6 is fixed to the frame 10 of the vinyl house 1 at the same height as the take-up rod support portion 5-1 of the take-up rod support pillar 5. ing. As shown in FIGS. 4 and 5, the take-up rod support 6 has two freely rotating rollers (6-1), a holding portion (6-2) that sandwiches the frame of the house, and a holding portion. It has a fixing screw (6-3) for tightening. The take-up rod 3 on which the opening / closing sheet 2 is wound is placed on the two roller portions 6-1 of the support 6 shown in FIGS. 4 and 5. Since the roller 6-1 rotates freely, the take-up rod 3 also rotates smoothly.

In a vinyl greenhouse with a long side, when the take-up rod is supported only at two points at both ends, the central part of the take-up rod tends to bend downward due to its own weight. In the greenhouse ventilation device according to the first embodiment, since the take-up rod support 6 supports the intermediate portion of the take-up rod 3, the take-up rod 3 does not bend. In a vinyl greenhouse having a longer side side, it is possible to prevent the take-up rod 3 from bending by increasing the number of take-up rod supports 6 installed as needed.

The length from the upper end to the lower end of the opening / closing sheet 2 is the same as the total length of the height of the dovetail frame 7 and the height of the take-up rod support portion 5-1 when the take-up rod support pillar 5 is installed. Alternatively, it is desirable to make it slightly longer than the total. When the side window of the vinyl house 1 is fully closed, the opening / closing sheet 2 is folded back inside the vinyl house 1 at the folded point on the ground surface, and the excess portion of the opening / closing sheet 2 facing inward and upward is the take-up rod support pillar 5. It reaches the take-up rod 3 placed on the top. Then, as shown in FIG. 1, a columnar weight 4 is placed on the folded portion of the opening / closing sheet 2. The opening / closing sheet 2 is pulled downward by the weight of the weight 4 to maintain a taut state. As shown in FIGS. 2 and 3, when the take-up rod 3 is rotated by turning the take-up handle 8 to wind up the opening / closing sheet 2, the weight 4 becomes the take-up rod 3 on the take-up rod support column 5. It rises to just below.

The weight 4 has a diameter of about 10 to 20 mm, and the length is a cylinder that is the same as or slightly longer than the width of the opening / closing sheet, but it may be cylindrical, and the material of the weight 4 is a metal such as iron or aluminum or vinyl chloride. Synthetic resin and the like are suitable.

FIG. 3 is a partial end view of the vinyl house at the position where the take-up rod support 6 is attached. The winding portion of the opening / closing sheet wound around the take-up rod 3 via the weight 4 is located inside the opening / closing sheet 2 in the stretched state up to the weight 4, and is located inside the vinyl house 1. Therefore, the winding part of this opening / closing sheet is not frozen during the daytime when ventilation is required, and snow ice and dust do not adhere to this part.

In FIG. 2, in a high temperature period such as summer, it is necessary to open the side window of the vinyl house 1 to a height equal to or higher than the height of the take-up rod support pillar 5. In this case, by removing the weight 4, the side window can be opened up to about 30 cm below the dovetail frame 7. In low temperature periods such as winter, the outside temperature is not as high as in summer even in fine weather during the daytime, so if the side window can be opened to a height directly below the take-up rod support portion 5-1 of the take-up rod support pillar 5, the opening will be as an opening. Is considered sufficient.

It is another embodiment of the ventilation system of the vinyl house of this invention. The difference between the ventilation device of the vinyl house of the second embodiment and the ventilation device of the vinyl house of the first embodiment is that the take-up rod supporting means is composed of a plurality of take-up rod supports. A plurality of take-up rod supports 6 are attached to the plurality of frames 10 in an number sufficient to support the take-up rods 3, and the take-up rod support columns 5 may or may not be provided.

The take-up rod support pillar 5 or the take-up rod support 6 is an example of means for supporting the take-up rod 3 at a constant height when the side window of the vinyl house 1 is fully closed. The means for supporting the take-up rod is not limited to these, and a means such as hanging the take-up rod on a ring-shaped belt or hook suspended from the frame of the house can be used as an alternative.

6 and 7 are perspective views of still another embodiment of the ventilation system of the greenhouse of the present invention. FIG. 6 shows the side window when the side window is fully closed, and FIG. 7 shows the side window when the side window is half open. In this embodiment, the side windows are the dovetail frame 7 for fixing the opening / closing sheet located at the upper part of the side surface of the vinyl house 1 and the dovetail frame 14 for fixing the hem film located at the lower part of the side surface of the vinyl house 1 in FIG. It is the part sandwiched between. One end of the opening / closing sheet 2 is fixed to the dovetail frame 7 fixed to the frame of the vinyl house 1 by an elastic stop wire (not shown), and the other end of the opening / closing sheet 2 is attached to the take-up rod 3 in the vinyl house. It is fixed by a packer (not shown).

As shown in FIGS. 6 and 7, in this embodiment, fixtures 11 are provided as means for supporting the take-up rods at both ends of the take-up rod 3 and the weight 4. The fixture 11 is a substantially rectangular parallelepiped plate with columnar holes on the upper and lower sides, and the take-up rod 3 rotatably penetrates through the upper hole and the weight 4 rotatably penetrates through the lower hole. doing.

The length of the fixture 11 in the longitudinal direction is usually about 40 cm, but it may be longer if necessary for areas with a larger amount of snow. The thickness of the fixture 11 is adjusted according to the strength of the material, but is preferably about 1 cm to 10 cm. The material of the fixture 11 can be a metal such as iron or aluminum, wood, a synthetic resin such as phenol resin, or the like, but is not limited thereto.

The length from the upper end to the lower end of the opening / closing sheet 2 is the same as the total length of the height of the dovetail frame 7 and the distance between the take-up rod 3 and the weight 4 fixed by the fixture 11, or the length thereof. It is desirable to make it slightly longer than the total. As shown in FIGS. 6, 7 and 8, the opening / closing sheet 2 goes around the weight 4 and is folded back inside the vinyl house 1 to reach the take-up rod 3.

As shown in FIGS. 6 and 7, a take-up rod support belt 12 is provided in the middle portion of the side surface of the vinyl house 1. The upper end of the take-up rod support belt 12 is fixed to the frame 10 of the vinyl house 1, and the lower end of the take-up rod support belt 12 is fixed to the take-up rod 3. It is desirable that the length between the upper end fixing portion and the lower end fixing portion of the take-up rod support belt 12 is equal to the distance between the frame 10 of the vinyl house 1 and the take-up rod 3 when the side window shown in FIG. 6 is fully closed. .. FIG. 8 is a partial end view of the house at the position where the take-up rod support belt 12 is installed. In FIG. 8, when the take-up rod 3 is rotated clockwise, the take-up rod support belt 12 is wound around the take-up rod 3 together with the opening / closing sheet 2, and when the take-up rod 3 is rotated counterclockwise, the take-up rod 3 is taken up. The rod support belt 12 and the opening / closing sheet 2 are rewound. The take-up rod support belt 12 supports the intermediate portion in the longitudinal direction of the take-up rod 3 and prevents the take-up rod 3 from bending due to its own weight. In the case of a vinyl greenhouse with a long side side, the number of installation locations of the take-up rod support belt 12 is increased as necessary.

As shown in FIGS. 6 and 7, in this embodiment as well, the take-up handle 8 and the take-up handle guide column 9 are provided in order to easily rotate the take-up rod 3, but the take-up rod 3 is used. The device for easily rotating is not limited to this, and various known techniques such as a type for connecting a rotation drive device can be applied.

When the side window shown in FIG. 6 is fully closed, the take-up rod 3 is located at the height of the hole on the upper side of the fixture 11. Therefore, the take-up portion 3 is not buried in the snow with a small amount of snow. As shown in FIG. 8, since the winding portion of the opening / closing sheet 2 wound around the winding rod 3 is always inside the vinyl house 1, it does not freeze during the day when ventilation is required. , No water, snow and ice, no dust adhesion or entrainment.

In FIG. 6, the opening / closing sheet 2 and the take-up rod support belt 12 are wound around the take-up rod 3 by turning the take-up handle 8 to rotate the take-up rod 3, and as shown in FIG. 7, the take-up rod is taken up. 3. The fixture 11 and the weight 4 are integrally raised, and the side window of the vinyl house 1 is opened. In the ventilation device of the vinyl house of the first embodiment, when the side window of the vinyl house 1 is opened above the height of the support pillar 5, the weight 4 must be removed, but in the ventilation device of the vinyl house of the third embodiment, the weight 4 must be removed. , The opening degree can be freely set from fully closed to fully open simply by rotating the take-up rod 3.

FIG. 9 is a perspective view when the side window of the vinyl house is fully closed in still another embodiment of the ventilation device of the vinyl house of the present invention. This embodiment is almost the same as that of the first embodiment, and the difference from the first embodiment is that the take-up rod support pillar 5 is long and the height of the take-up rod support portion 5-1 is the dovetail frame 7 for fixing the opening / closing sheet. It is only located about 20 cm below. In this embodiment, the side window is divided into a portion of the open sheet 2 extending from the dovetail frame 7 to the weight 4 and a portion of the open sheet 2 folded back on the lower surface of the weight 4 to reach the take-up rod 3 when the side window is fully closed. It will be heavily covered. Therefore, in addition to the effect of Example 1, it also has an effect of being excellent in heat retention when fully closed.

FIG. 10 is a perspective view when the side window of the vinyl house is fully closed in still another embodiment of the ventilation device of the vinyl house of the present invention. This embodiment is almost the same as that of the fourth embodiment, except that the opening / closing sheet 2 is formed by connecting the insect repellent net 2-1 and the transparent film 2-2. The end of the insect repellent net 2-1 is fixed to the dovetail frame 7, and the end of the transparent film portion 2-2 is fixed to the take-up rod 3. Both the length of the insect repellent net 2-1 and the length of the transparent film 2-2 correspond to the distance between the dovetail frame 7 and the ground. That is, both the insect repellent net 2-1 and the transparent film 2-2 have a length sufficient to cover the side windows. As shown in FIG. 10, when the side window is fully closed, the insect repellent net 2-1 is deployed from the dovetail frame 7 to the weight 4 located near the ground surface, and is wound from the place where the weight 4 is folded inward on the lower surface. A transparent film 2-2 is developed up to the take rod 3. Therefore, the side window of the vinyl house 1 is closed by the transparent film 2-2, and the vinyl house 1 is kept warm. At this time, the insect repellent net 2-1 does not exert any particular effect. Use as described above during the low temperature period from late autumn to early spring.

FIG. 11 shows a perspective view when the side window of the vinyl house 1 is covered with the insect repellent net 2-1 in the fifth embodiment. As shown in FIG. 11, except for the take-up rod support column 5 and the weight 4, by locating the take-up rod 3 on which the transparent film 2-2 is wound up near the above-ground portion, only the insect repellent net 2-1 is on the side. The window can be covered. In the high temperature period when many pests occur, by covering the side windows only with the insect repellent net 2-1 the outside air enters the vinyl house 1 through the mesh of the insect repellent net 2-1. The temperature inside can be lowered to about the outside air temperature, and at the same time, the insect repellent net 2-1 can prevent pests from invading the greenhouse 1. In this way, the state in which the side window is closed with the transparent film 2-2 and the state in which the side window is covered with the insect repellent net can be easily switched.

A synthetic resin such as polyethylene is suitable as the material of the insect repellent net 2-1. The mesh size of the insect repellent net 2-1 is suitable to be 0.2 mm to 4 mm, and an insect repellent net having an appropriate mesh size is selected depending on the type of crop cultivated in the vinyl house 1 and the type of pests generated. As the material of the transparent film 2-2, a vinyl chloride resin sheet or a polyolefin resin sheet generally used for coating an agricultural greenhouse is suitable, but other than the openings such as the roof and the end surface of the vinyl house 1. It may be made of the same material as the sheet used for coating. As a method of connecting the insect repellent net 2-1 and the transparent film 2-2, glue, bond, hot melt crimping, sewing, stapler and the like can be adopted.

1 Vinyl house 2 Opening and closing sheet 2-1 Insect-proof net 2-2 Transparent film 3 Winding rod 4 Weight 5 Winding rod support pillar 5-1 Winding rod support part 6 Winding rod support 6-1 Supporting tool Roller 6- 2 Holding part 6-3 Supporting tool fixing screw 7 Opening and closing sheet fixing dovetail frame 8 Winding handle 9 Winding handle guide pillar 10 Vinyl house skeleton 11 Fixing tool 12 Winding rod support belt 13 Hem film 14 Hem Dovetail frame for film fixing 15a Side edge coating film 15b Side edge coating film

Claims (5)

An opening / closing sheet for opening / closing the side window of the vinyl house and a take-up rod for winding the opening / closing sheet are provided. It has a surplus part that is folded back and faces upward inside the vinyl house, has a weight that pulls the opening / closing sheet downward at the folding part, and a winding rod that winds up the surplus part of the opening / closing sheet is constant from the ground surface. A greenhouse ventilator comprising a wind-up rod supporting means for supporting the height of the wind-up rod, wherein the wind-up rod supporting means can be moved in the vertical direction. An opening / closing sheet for opening / closing the side window of the vinyl house and a take-up rod for winding the opening / closing sheet are provided. It has a surplus part that is folded back and faces upward inside the vinyl house, has a weight that pulls the opening / closing sheet downward at the folding part, and a winding rod that winds up the surplus part of the opening / closing sheet is constant from the ground surface. In a greenhouse ventilator equipped with a take-up rod support means that supports the height of
The take-up rod support means is a take-up rod support column having a take-up rod support portion installed on an extension line of the side surface of the vinyl house, and the take-up rod support portion of at least two take-up rod support columns. A ventilation device for greenhouses, which is characterized by supporting a take-up rod that winds up the excess part of the opening / closing sheet. The ventilation device for a vinyl house according to claim 1, wherein the take-up rod support means is a take-up rod support fixed to a structure of a vinyl house, and the take-up rod support has a roller. .. An opening / closing sheet for opening / closing the side window of the vinyl house and a take-up rod for winding the opening / closing sheet are provided. It has a surplus part that is folded back and faces upward inside the vinyl house, has a weight that pulls the opening / closing sheet downward at the folding part, and a winding rod that winds up the surplus part of the opening / closing sheet is constant from the ground surface. In a greenhouse ventilator equipped with a take-up rod support means that supports the height of
The take-up rod supporting means is a rectangular fixture for supporting the take-up rod and the weight, has a take-up rod support belt for supporting the take-up rod, and winds up with at least two fixtures. supporting the rod and weight, one end of the winding rod supporting belt is secured to the winding rod, the other end of the winding rod supporting belt, characterized in that it is fixed to the structure of the vinyl house vinyl House ventilation system . The opening / closing sheet consists of an insect-proof net and a transparent film connected to each other. The end of the insect-proof net is fixed to the upper end of the side window of the vinyl house, and the end of the transparent film is fixed to the take-up rod. The ventilation device for a greenhouse according to any one of claims 1 to 3, wherein the ventilation device is provided.