JPH0345566Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field The present invention relates to an opening/closing mechanism for the roof sheet of a vinyl greenhouse used for cultivating fruit trees, etc.

(b) Background technology Today, in order to ensure a stable supply of fruits unaffected by the weather, techniques for cultivating dwarfing fruit trees are progressing, and at the same time, vinyl greenhouses are often used as indispensable equipment.

However, in a greenhouse, the roof sheet must be opened and closed depending on the weather such as winter or rain, but conventionally this opening and closing work was done manually by multiple workers.For example, when opening the roof, the worker At the same time, the sheet is rolled up and folded, and finally closed with a band, and when the roof is closed, it is unfolded, and finally, a rubber band is placed over the entire roof to prevent the sheet from flapping in the wind.
It used to be very time consuming and inefficient.

Therefore, in order to automate this opening and closing work,
It has also been proposed that a winding shaft rotatably movable along the roof is fixed to the lower end of the roof sheet, the winding shaft is connected to a handle, and the sheet is wound up by rotation of the handle. When winding the sheet, a part of the sheet gets entangled with the winding shaft and cannot be wound evenly, sometimes making it impossible to wind the sheet, and when the sheet is unloaded, the house band as described above still occurs. There were still many drawbacks, such as the need for

(c) Disclosure of the invention In view of the drawbacks of the conventional sheet opening/closing mechanism as mentioned above, the present invention is designed to be easily operated by one person. The house is constructed by arranging a plurality of two parallel arch-shaped frames with a gap in the length direction of the house, and within the gap formed by the upper and lower arch frames, there is a movable rod on either the upper or lower end side. The movable rod is connected to a plurality of winding drums fixed to a rotating shaft of a chain gear attached to a central pillar in the house by each pull-up string and pull-down string, each of which has one end fixed to a plurality of winding drums. The present invention relates to a sheet opening/closing mechanism for a vinyl greenhouse that is configured to be movable up and down within the above-mentioned gap.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(D) Embodiment Figures 1 to 3 show an example of the mechanism of the present invention, in which A is the house body, 2 is the roof part, and the house body A has a structure in which the house body A is provided with holes arranged at regular intervals in the longitudinal direction of the house A. It is composed of a central pillar 1 made of steel pipes etc. erected in multiple directions, side pillars 2 erected around the four sides, and a number of cross beams 3, and the roof part B is parallel to each other with an appropriate gap above and below. It is constructed by arranging a plurality of two arch-shaped frames 4 in parallel in the length direction of the house A, and the upper arch frames 4a and lower arch frames 4b are horizontally spanned from each other at key points. They are connected and reinforced by a pipe 5.

6 is a chain gear such as a chain block attached to one side of the center pillar 1 of the house main body A. A rotating shaft 7 that rotates together with the gear 6 extends in the length direction of the house A, and is located at important points. A plurality of winding drums 8 are fixed at predetermined intervals.

Reference numeral 9 denotes left and right roof sheets inserted into the arch-shaped gap 4' formed by the upper and lower arch frames 4a and 4b. It is fixed to a rod-shaped or tubular movable rod 10 which also serves as a weight and has a length approximately equal to the length of the house A inserted into the housing A.

Reference numeral 11 denotes a pull-up string, 12 a pull-down string, and both strings 11 and 12 are wound in opposite directions with one end fixed to the surface of each winding drum 8 at a position slightly apart from each other. The end is a pulley 13 provided on the inside of the top of the lower arch frame 4b or on the upper side surface of the middle pillar 1 attached to the chain gear 6.
a, and the other end of the pulling string 12 is fixed to the pulling string 11 of the moving rod 10 via another pulley 13b provided inside the lower end of the lower arch frame 4b. fixed in close proximity to the position.

Therefore, when the chain 14 of the chain gear 6 is operated to rotate the drum in the winding direction of the pulling string 11, each pulling string 11 simultaneously pulls up the moving rod 10 along the gap 4' between the two frames. By going,
Both roof sheets 9, which were gathered in the left and right lower parts of the gap 4', gradually expand upward, and at the same time, the pull-down string 12, which was wound around the drum 8, is sequentially let out.

In addition, when both the strings 11 and 12 have one end fixed to the drum 8 as described above, it is necessary to wrap them around the surface of the drum 8 with a sufficient length, but the strings 11 and 12 It is also possible to connect them together to form a single piece, and to wrap it around the drum 8 surface several times to prevent slipping.

Reference numeral 15 denotes a ceiling sheet laid to an appropriate width along the upper surface of the top of the upper arch frame 4a, and serves as a rain cover when the left and right sheets 9 expand from the bottom to the top as described above and the roof is closed. 16 is a side sheet.

Furthermore, when the expanded sheets 9 are gathered together to open the roof, the chain 14 is pulled in the opposite direction and the drawn-out pull-down string 12 is wound around the drum 8, thereby moving it into the gap 4'. The moving rod 10 that has moved upward is lowered together with the sheet 9.

Figures 4 to 6 show another embodiment of the present invention, in which both the left and right roof sheets 9 (this may be made into one sheet as shown in the figures) have their upper ends arched into upper and lower arches. The frame 4a, 4b is fixed to the top of the gap 4', and a movable rod 10 is attached to the lower end of the sheet 9, so that the sheet 9 is gathered upward in the gap 4' when the roof is open. ing.

The rotating shaft 7 has a winding drum 8a with two different diameters, large and small.
8b are attached at appropriate intervals, the diameter of the small diameter drum 8b is 1/2 that of the large diameter drum 8a, and one end of the pulling string 11 is fixed to each large diameter drum 8a. The other end passes through the pulley 13a on the upper side surface of the middle column 1, and then goes around the outer side of the moving rod 10 on the lower edge of the seat 9 from the lower side of the seat 9 in the gap 4', passes over the upper side of the seat 9, and connects to the upper arch frame 4a. It is fixed to a fixing rod 17 that is fixed across the inner surface of the top part.

On the other hand, one end of the pull-down string 12 is wound in the opposite direction to the pull-up string 11 and fixed to each small-diameter drum 8b, and the other end is arranged in the length direction of the house A below the lower end of the gap 4'. It is fixed to the movable rod 10 at the lower end of the seat 9 in the gap 4' via a pulley 13b rotatably provided on the floating shaft 18, which allows the pulley 13b (therefore the floating shaft 18)
is floating above the ground. Reference numeral 19 is a tensioner connecting the floating shaft 18 and the ground, and reference numeral 20 is a guide roller for the pull-down string 12 provided inside the lower end of the lower arch frame 4b.

When the chain gear 6 is rotated by the chain 14 and the pulling string 11 is wound around the drum 8a, the movable rod 10 rises within the gap 4', and, contrary to the above-mentioned case, The sheets 9 are concentrated upwardly within the gap 4', and the roof is opened.

Note that as the pull-up string 11 is wound up, the pull-down string 12 is simultaneously unwound, but as mentioned above, the pull-up string 11 goes around the circumference of the sheet 9 almost once, and the winding length of the string 11 changes. Rod 1
0, so if the length of the pull-out string 12 and the length of the wind-up string of the pull-up string 11 are set at the same time, the length of the pull-down string 12 that is let out
will become slack one after another. Therefore, as mentioned above, the diameter of the winding drum 8b for the pulling string 12 is set to 1/2 of the diameter of the drum 8a for the pulling string 11.
In addition, a tension 19 is applied to the pull-down string 12 to prevent it from sagging.

Moreover, when the sheet 9 gathered upward is expanded and the roof is closed, the chain 14 is pulled in the opposite direction, the pull-down string 12 is wound around the winding drum 8b, and the moving rod 10 is lowered. be.

(e) Effects of the invention The present invention is constructed as described above, and the roof sheet can be opened and closed uniformly by the rotation of the chain gear, so there is no failure of the conventional method as described above, and the opening and closing operations can be performed by one person. Since the roof sheet is housed in the gap between the upper and lower arch frames, there is no need to worry about it flapping due to the wind when it is expanded. It has the following advantages.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the seat opening/closing mechanism according to the present invention, Fig. 2 is a perspective view of the main parts thereof, Fig. 3 is a perspective view of the entire greenhouse to which this is applied, and Fig. 4 is A front view showing another embodiment of the present invention,
FIG. 5 is a perspective view of the main parts thereof, and FIG. 6 is a perspective view of the entire greenhouse to which this is applied. Code explanation, A... House body, B... Roof part,
1... Middle pillar, 2... Side pillar, 3... Yokoro, 4a...
Upper arch frame, 4b... Lower arch frame, 4'... Gap, 5... Moya pipe, 6... Chain gear, 7... Rotating shaft, 8... Winding drum, 9...
Roof sheet, 10... Moving rod, 11... Pulling string, 12... Pulling string, 13... Pulley, 14...
... Chain, 15 ... Ceiling sheet, 16 ... Side sheet, 17 ... Fixed rod, 18 ... Floating shaft, 19 ... Tension, 20 ... Guide roller, 21 ... Girder,
22...Muneki.

Claims (1)

[Scope of utility model registration request] The roof of a plastic greenhouse is constructed by arranging a plurality of two arch-shaped frames parallel to each other in the length direction of the house with an appropriate gap above and below, and within the gap formed by the upper and lower arch frames. houses a roof sheet with a movable rod fixed to either the upper or lower end, and each of the movable rods has one end attached to a plurality of winding drums fixed to a rotating shaft of a chain gear attached to a central pillar in the house. A sheet opening/closing mechanism for a vinyl greenhouse, characterized in that it is configured to be movable up and down within the gap by each fixed pull-up string and pull-down string.