JPH07972B2 - Louver device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a louver device that uses a sheet material and that can be opened and closed.

[Prior Art] Generally, a movable louver device in which a louver blade portion is rotated to open and close is used for lighting, adjusting ventilation, and the like. But,
A conventional movable louver device includes a mechanism that pivotally supports both ends of each louver blade, and a mechanism that rotates these louver blades, and its structure is complicated and costly. It was large and heavy.

In order to solve such a problem, a movable louver device having a simple structure and using a flexible sheet material has been developed. Such a louver device is disclosed in "Japanese Patent Publication No. 61-146118" filed by the present applicant. Such a louver device has a louver body in which a plurality of cut grooves are formed from one side edge portion to the other side edge portion of a flexible sheet material, and a portion between these cut grooves is formed as a louver blade portion. The louver body is stretched on the movable frame mechanism and is deformed to give shear deformation to the louver body. And
When shear deformation is applied to such a louver body, the shear deformation is converted into a twisting deformation of each louver blade portion, these louver blade portions rotate, and the louver body opens and closes.

Since such a louver device has a simple structure and can be manufactured at low cost, and is thin and lightweight, it can be used for various purposes. The first possible use of such a louver device is to use it as a lighting control device for a greenhouse. That is, by installing such a louver device inside the roof of a greenhouse, a vinyl house, etc., and opening and closing it, the amount of light that enters the greenhouse can be controlled arbitrarily, and the temperature inside the greenhouse rises. Can also be controlled. Further, by closing the louver device at night during winter, heat radiation from the inside of the greenhouse can be blocked, and heat retention can be improved. Also,
This louver device is lightweight, and even if it is laid over the entire roof part of the greenhouse, it does not need to reinforce the greenhouse frame, etc., and the louver device itself is extremely inexpensive, so it is profitable for agricultural management. There is sufficient practicality.

However, especially when such a louver device is used for a greenhouse or the like, it is desirable to reduce the installation cost of the louver device as much as possible from the viewpoint of profitability. Needless to say, it is preferable to reduce the manufacturing cost even when it is used for other purposes.

[Problems to be Solved by the Invention] In the present invention, in the louver device using the above-mentioned flexible sheet-shaped material, the louver body is stretched and the frame mechanism for giving shear deformation to the louver body is simplified as much as possible. ,
The purpose is to reduce the manufacturing cost and increase the reliability.

[Means for Solving Problems and Actions Thereof] According to the present invention, a plurality of kerfs are formed from one side edge portion to the other side edge portion of the sheet-shaped material, and the louver blade portion is provided between the kerfs. Movable frame members are provided along both side edges of the louver body formed on the louver body, the movable frame member is rotatably supported in the plane of the louver body by a pivoting mechanism, and the movable frame members are tensioned by a tensioning mechanism. Are urged in a direction in which they are separated from each other to give tension to the louver body, and at least one of the movable frame members is rotated by a rotating mechanism to give shear deformation to the louver body, and the louver body is opened and closed. It is a thing.

Therefore, if this movable frame mechanism is attached to, for example, the frame of the greenhouse via the pivotal support mechanism, the frame member along the longitudinal direction of the louver blade portion of the louver body becomes unnecessary.
Further, when the louver body is opened and closed, it slightly expands and contracts in the longitudinal direction, but this expansion and contraction is absorbed by the tension mechanism. When the louver body is stretched from one end to the other end of the roof of the greenhouse, the louver body becomes extremely long, but the tension mechanism gives tension to the louver body. The louver body does not sag. Therefore, the structure is extremely simple, and the cost thereof is significantly reduced especially when a louver device having a large area is constructed.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the louver device of the present invention is used as a lighting control device for a greenhouse. In the figure, 1 is the roof of the greenhouse, and 2 is the wall. Then, reinforcing frames 3 and 7 are provided inside the roof portion 1. The louver device 10 of the present invention is attached to these frames 3 and 7. The louver device 10 has a long strip shape and is stretched from one side to the other side of the roof portion 1 along the east-west direction. Further, the plurality of louver devices 10 are aligned without any gap, and the roof portion 1 of the greenhouse is Covers the entire surface of.

These louver devices 10 are constructed as shown in FIG. These louver devices 10 include a louver body 16. The louver body 16 is composed of a flexible sheet-shaped material having a long strip shape, and is formed in a parallelogram shape from the beginning in this embodiment. The louver body 16 is divided into a plurality of unit portions in the longitudinal direction. of course,
These unit parts 16a are for explanation, and the actual louver body 16 is a continuous and integral body. And
In each unit portion 16a, a plurality of kerfs 20 are formed in parallel with each other from the one side edge portion to the other side edge portion thereof at a constant interval, and the portion between these is formed in the louver blade portion 21. ing. Further, both ends of these kerfs 20 are bent in mutually opposite directions, so that both ends of these louver blade portions 16a are bent in a V shape in opposite directions.

The sheet material used for the louver body 16 is, for example, a synthetic resin sheet. Then, on both surfaces of this sheet, light reflecting surfaces such as a vapor deposition film of aluminum are formed.

The movable frame members 13 and 14 are attached to both side edges of the louver body 16 along the edges by adhesion or the like. Further, the auxiliary movable frame member 15 is attached to the boundary between the unit portions 16a. The central portion of one movable frame member 13 has a pivotal support mechanism such as a pivot shaft 28.
Is rotatably supported in the plane of the louver body 16 by the frame 7 of the greenhouse. Further, the central portion of the other movable frame member 14 is rotatably supported on the moving member 18 within the plane of the louver body 16 by a pivot shaft 25 similar to the above. The moving member 18 is attached to the greenhouse frame 7 via a tensioning mechanism such as a spring 26. The movable frame members 13 and 14 are urged by the spring 26 in a direction in which the movable frame members 13 and 14 are separated from each other, thereby applying a longitudinal tension to the louver body 16 so that the louver body 16 does not sag. Further, the central portion of the auxiliary movable frame member 15 is also connected to the greenhouse frame 7 by the same pivot shaft 27 as described above.
It is rotatably supported by. It should be noted that these auxiliary movable frame members 15 are configured to be able to move a little in the longitudinal direction of the louver body 16.

The one movable frame member 13 is configured to be rotationally driven by the rotational mechanism. This rotating mechanism is configured as follows. An arm 29 is projectingly provided at the center of the one movable frame member 13, and the tip of this arm 29 is connected to a drive member 31 via a pin 30. The drive member 31 is long, and the arm 29 of one movable frame member 13 of each louver device 10 is connected to the drive member 31. The drive member 31 is connected to the drive mechanism 11. The drive mechanism 11 has a built-in motor, speed reducer, and the like, and is configured to move the drive member 31 in the axial direction and thereby rotationally drive each movable frame member 13.

Further, the greenhouse of this embodiment is capable of automatically controlling the amount of light, temperature and the like. As shown in FIGS. 1 and 3, the greenhouse is provided with a control device 4, a light amount detector 5, a temperature detector 6 and the like. Then, the signals from the light amount detector 5, the temperature detector 6 and the like are sent to the control device 4. The control device 4 controls the drive mechanism 11 in response to these signals to automatically open and close the louver device 10 to automatically set the light amount, temperature, etc. in the greenhouse to a predetermined value. Is configured to control.

Next, the operation of the above embodiment will be described. First, the louver device 10 is closed at night during winter. In this state, the louver body 16 is not subjected to shear deformation, and as shown in FIGS. 4 and 6, the louver blade portions 21 are aligned on the same plane, and the louver body 16 has a planar shape. Is doing. In this state, the louver body 16 is in the same state as a single sheet with a plurality of kerfs 20. Therefore, the roof of this greenhouse has a double structure,
Keep the inside warm. Further, since the sheet-shaped material used for the louver body 16 has the light reflecting surface, it reflects the heat radiation from the inside of the greenhouse and exhibits a high heat retaining property.

When sunlight is introduced into the greenhouse, the drive mechanism 11 moves the drive member 31 in the axial direction to rotate the movable frame member 13. Due to the rotation of the movable frame member 13, shear deformation is applied to the louver body 16, and the other movable frame member 14 and the auxiliary movable frame member 15 are also used.
Together, the shear deformation is converted into a twisting deformation of the end portion of each louver blade portion 21 as shown in FIGS. 5 and 7, and these louver blade portions 21 rotate, and the louver body 16 Is opened.

Therefore, sunlight passes between these louver blades 21 and is introduced into this greenhouse. Also, this movable frame member
By adjusting the rotation amount of 13, that is, the shear deformation amount of the louver body 16, the rotation angle of these louver blade portions 21 can be arbitrarily adjusted, and the light passage amount can be arbitrarily controlled.

Also, since this louver 16 originally has a light reflecting surface,
The light that hits the louver blades 16 is diffused and introduced into the greenhouse, and the light is incident on the backs of the leaves of the plants and the depths of the overlapping leaves in the greenhouse, thus improving the light utilization efficiency.

In the case of this embodiment, the louver blade portion 21 is set to about 90 °.
However, in the mid-latitude region, the altitude of the sun is around 80 ° even in the summer solstice, and it is not necessary to introduce all the sunlight in the summer, so the maximum rotation angle of these louver blades 21 is About 70 ° is enough.

Further, the auxiliary movable frame member 15 is provided in the middle of the louver body 16.
Since the louver body 16 is provided, the middle portion does not sag even when the louver body 16 is long.

Further, since both ends of the cut groove 20 of the louver body 16 are bent in mutually opposite directions and both ends of the louver blade portion 21 are formed in a V shape, both ends of the louver blade portion 21 are twisted. Bending deformation is added to these end portions when they are deformed, and the amount of rotation of these louver blades 21 relative to the amount of rotation of the movable frame member 13 increases.

The present invention is not limited to the above embodiment. For example, the pivot support mechanism, the tension mechanism, the rotation mechanism, and the like are not necessarily limited to those described above, and may have other structures.

Further, the auxiliary movable frame member does not necessarily have to be provided, and these may be omitted to form a kerf and a louver blade portion that are continuous from one side edge to the other side edge of the louver body.

Further, the sheet material used for the louver body is not limited to the synthetic resin sheet, and a metal thin plate such as stainless steel or a laminate material made of various materials may be used. Further, the sheet-like material does not necessarily need to have the light reflecting surface.

Further, the movable frame member and the auxiliary movable frame member do not necessarily have to be linear. For example, when the roof part of the greenhouse is a curved surface such as a greenhouse, these movable frame members may be curved in the thickness direction of the louver body. With this configuration, the louver body is stretched in a curved shape, and can be stretched along the curved roof portion.

Further, the rotating mechanism does not rotate only one movable frame member, but may be configured to rotate both movable frame members.

Further, the present invention is not limited to a greenhouse lighting adjustment device,
It can also be used as a building solarium, skylight, window, and other lighting control devices. If the louver body is made of a sheet material having high strength and the tension of the tension mechanism is increased, the louver body can also be used as a ventilation adjusting device.

EFFECTS OF THE INVENTION As described above, according to the present invention, movable frame members are provided on both sides of a sheet-shaped louver body, the louver body is stretched by a tension mechanism, and at least one movable frame member is rotated. Since the louver body is opened and closed, its frame mechanism is extremely simple, the manufacturing cost is reduced, the reliability is increased, and the weight is reduced.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is a front view of a greenhouse equipped with the louver device of the present invention, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIG. A plan view, FIG. 4 is a perspective view of a part of the louver device in a closed state, FIG. 5 is a perspective view of a part of the louver device in an open state, and FIG. 6 is a line VI-VI in FIG. FIG. 7 is a sectional view taken along line VII-VII in FIG. 10 ... Louver device, 16 ... Louver body, 13, 14 ... Movable frame member, 20 ... Groove, 21 ... Louver blade part, 25, 27, 28 ... Pivot shaft, 26 ... Spring, 29 ... Arm, 31 ... Drive Element

Claims (1)

[Claims] 1. A louver body in which a plurality of cut grooves are formed from one side edge portion to the other side edge portion of a flexible sheet material, and a portion between these cut grooves is formed as a louver blade portion, respectively. Movable frame members respectively attached along both side edges of the louver body, a pivoting mechanism for pivotally supporting the movable frame members in the plane of the louver body, and the movable frame members separated from each other. A louver device comprising: a tensioning mechanism for biasing the louver body in a direction to apply a tension to the louver body; and a rotating mechanism for rotating at least one of the movable frame members.