JP2024165914A - Supporting member - Google Patents

Abstract

To provide a support member of a band which can achieve reduction of force required in driving a winding shaft or suppression of deterioration of a sheet when installed in a simple structure.SOLUTION: Means for solving the problem is a support member 7 that supports one end of a band 4 and is installed in a greenhouse H comprising: a light shielding sheet 2 which covers a predetermined range of a roof surface of an arch-shaped greenhouse body 10 from above; a winding shaft 3 which is attached to one end of the light shielding sheet 2, and rolls on the roof surface of the greenhouse body 10 to perform winding and letting out of the light shielding sheet 2; and the band 4 which is installed along a width direction of the greenhouse body 10, and is capable of pressing the light shielding sheet 2 from above toward the greenhouse body 10 side, wherein the support member is provided below a lower end of the light shielding sheet 2 in a state of being let out to the maximum by the winding shaft 3 in a side part of the greenhouse body 10, and supports the one end of the band 4 at a position apart to an outdoor side from the side part of the greenhouse body 10.SELECTED DRAWING: Figure 1

Description

This invention relates to a support member.

In simple structures such as vinyl greenhouses, greenhouses, and simple warehouses, there are cases where a sheet winding device is provided, such as a ventilation device that opens and closes the roof sheet stretched over the roof surface of the simple structure to provide ventilation, or a shading device that unfolds and retracts the shading sheet that covers the roof sheet to adjust the amount of sunlight entering the simple structure.

Such a sheet winding device is equipped with a winding shaft that is attached to the lower end of a roof sheet or a shading sheet (hereinafter referred to as a "sheet") and rolls on an arch-shaped framework that forms a simple structure to wind and unwind the sheet, and a drive device that drives the winding shaft (for example, Patent Document 1).

In these types of simple structures, bands are provided to hold the sheet down from above toward the roof surface to prevent it from flapping in strong winds.

Japanese Patent Application Publication No. 11-299365

Such bands are used by suspending the structure from the top to the side, or by spanning the top of the structure from one side to the other. The bands are also in contact with the sheet with a certain amount of tension to prevent the sheet from flapping in strong winds.

When a sheet is wound around a winding shaft, the sheet is wound into a roll around the winding shaft, and as the sheet is wound up, the roll diameter of the sheet wound around the winding shaft increases.

In this way, as the sheet is wound up and the roll diameter increases, the band is pushed away from the roof surface by the rolled sheet, and the reaction force causes the band to press the sheet more firmly against the framework.

If the pressing force of the band is too strong, the friction between the band and the sheet and between the sheet and the winding shaft will increase, which will increase the force required to drive the winding shaft and cause the sheet to deteriorate.

The present invention aims to provide a band support member that, when installed on a simple structure, can reduce the force required to drive the winding shaft and suppress deterioration of the sheet.

The means for achieving the above object is a simple structure comprising an arch-shaped simple structure body having a plurality of arch-shaped aggregates arranged in the depth direction and a covering sheet stretched over the aggregates, a sheet covering a predetermined area of the roof surface of the simple structure body from above, a winding shaft attached to one end of the sheet and rolling over the roof surface of the simple structure body to wind and unwind the sheet, and a band installed along the width direction of the simple structure body and capable of pressing the sheet against the simple structure body from above. The support member is installed on the simple structure and supports one end of the band, and is characterized in that it is installed below the lower end of the sheet when it is maximally unwound by the winding shaft on the side of the simple structure body, and supports one end of the band at a position spaced apart from the side of the simple structure body to the outdoors. With this configuration, when the support member is attached to the side of the simple structure body, one end of the band can be moved away from the side of the simple structure body toward the outdoors, reducing the force with which the band presses the sheet toward the simple structure body near the side of the simple structure body.

The support member of the present invention may also include a fixing portion fixed to the side of the simple structure body, an upright portion that is elastic and rises from the fixing portion toward the outdoor side of the simple structure body, and a support portion provided at the tip of the upright portion to support one end of the band, and the tip of the upright portion may be located above the normal line of the simple structure body that passes through the base end of the upright portion. According to this configuration, the support portion provided at the tip of the upright portion and directly supporting the band is located closer to the top of the simple structure body than the normal line of the aggregate that passes through the base end of the upright portion. Therefore, the support portion is pressed toward the aggregate under the tension of the band, but since the line of action of the pressing force that the support portion receives from the band is shifted from the axial direction of the straight piece, the upright portion receives a moment that causes it to fall toward the top side of the vinyl greenhouse body with the base end as a fulcrum due to the pressing force of the band. Therefore, when the diameter of the sheet roll increases during sheet winding and the pressing force of the band exceeds a certain level, the standing portion elastically deforms so as to fall toward the top of the simple structure body, and the support portion supporting one end of the band approaches the top of the simple structure body, loosening the band by that amount and reducing the pressing force of the band. Therefore, with a support member configured in this way, the pressing force of the band can be reduced when the pressing force of the band becomes particularly large during sheet winding, so that the frictional force generated between the band and the sheet and between the sheet and the winding shaft can be effectively reduced.

In addition, in the support member of the present invention, the standing portion has a pair of straight pieces extending from the fixing portion toward the outdoor side of the simple structure body and arranged side by side along the depth direction of the simple structure body, and a pair of inclined pieces extending from the tip of each of the straight pieces and inclining upward from the tip, and the support portion may extend along the depth direction of the simple structure body and connect the tips of each of the inclined pieces. With this configuration, by arranging the straight pieces along the normal line, it is easy to position the tip of the standing portion above the normal line. Also, since the support portion that supports the band is supported by the pair of standing portions, the support member is stable and the support member can be prevented from shaking.

When the support member of the present invention is installed on a simple structure, it is possible to reduce the force required to drive the winding shaft and suppress deterioration of the sheet.

FIG. 2 is a perspective view of the simplified structure of the present embodiment. FIG. 2 is a front view of the simplified structure of the present embodiment. FIG. 2 is an enlarged perspective view showing a portion where one end of the band is fixed to the simple structure according to the embodiment of the present invention. FIG. 2 is a perspective view of a support member according to the present embodiment. FIG. 13 is a perspective view of a support member according to a modified example. 1A is a front view showing an enlarged view of a portion of the support member of the modified example that is fixed to the simplified structure, and FIG. 1B is a front view showing an enlarged view of a portion of the support member of the modified example that is fixed to the simplified structure, the portion of the support member being tilted toward the top of the arch pipe. FIG. 13 is an enlarged perspective view showing a portion of a support member according to a modified example that is to be installed on a simplified structure.

The present embodiment will be described below with reference to the drawings. The same reference numerals are used throughout the drawings to indicate the same parts.

In this embodiment, the simple structure is a vinyl greenhouse H. As shown in Figs. 1 and 2, the vinyl greenhouse H includes a vinyl greenhouse body 10, which is a simple structure body having arch pipes P1, which are a plurality of arch-shaped aggregates arranged along the depth direction, and a covering sheet S stretched over the arch pipes P1; a shading device 1, which is a sheet winding device capable of winding and unwinding a shading sheet 2 that covers the roof surface of the vinyl greenhouse body 10 from above; a band 4 that is installed along the width direction of the vinyl greenhouse body 10 and can press the shading sheet 2 against the vinyl greenhouse body 10 from above; and a support member 7 that is installed on the side of the vinyl greenhouse body 10 and supports one end of the band 4 at a position spaced apart from the side of the vinyl greenhouse body 10.

The following is a detailed description of each part of the greenhouse H of this embodiment. As shown in Figures 1 and 2, the arch pipe P1 in the greenhouse body 10 of this embodiment has a pair of standing parts P1a that stand straight up from the ground G, and a roughly arc-shaped arch part P1b that connects the upper ends of the standing parts P1a.

In the following description, the part of the greenhouse body 10 that faces the top of the arch pipe P1 is referred to as the top of the greenhouse body 10, the surface within the range of the arch portion P1b of the arch pipe P1 is referred to as the roof surface of the greenhouse body 10, and the part that faces the rising portion P1a of the arch pipe P1 is referred to as the side of the greenhouse body 10.

In this embodiment, the covering sheet S stretched over the arch pipe P1 is composed of a side sheet S1 that covers the left and right side surfaces of the greenhouse body 10, a gable side sheet S2 that covers the front and rear gable sides of the greenhouse body 10, and two roof side sheets S3, S3 that are divided widthwise at the top of the greenhouse body 10 and stretched from the top of the greenhouse body 10 to each side to cover the roof surface of the greenhouse H, as shown in Figures 1 and 2.

Specifically, as shown in Figures 1 and 2, when viewed from the depth direction, each standing portion P1a of the arch pipe P1 has an upper frame F1 that is suspended along the depth direction from the upper end side of the standing portion P1a, and a lower frame F2 that is suspended along the depth direction from the lower end side of the standing portion P1a, arranged side by side. Then, by fixing each end of the side sheet S1 between the upper frame F1 and the lower frame F2, each side of the vinyl greenhouse H has a side sheet S1 provided.

As shown in FIG. 2, the greenhouse body 10 is equipped with a plurality of support pipes P2 that support the arch pipe P1 arranged on the gable side from below and are arranged along the width direction of the greenhouse body 10, and a plurality of gable side frames F3 that are spanned between each support pipe P2 along the width direction of the greenhouse body 10, and an opening is formed that is surrounded by the support pipes P2, the gable side frames F3, and the ground G.

The gable side sheet S2 is then attached to the gable side frame F3 while avoiding the opening, allowing the opening to function as an entrance and exit for the greenhouse H while the gable side sheet S2 is attached to the gable side of the greenhouse H.

Although not described in detail, the upper frame F1, lower frame F2, and end frame F3 of this embodiment each have a groove with an opening narrower than the bottom, and with sheets S1 and S2 inserted into this groove, an elastic member made of a corrugated metal spring is fitted over sheets S1 and S2, and each sheet S1 and S2 is fixed to each frame F1, F2, and F3 by the resilience of the elastic member. Note that this elastic member is not limited to a corrugated metal spring, and may be other elastic members such as rubber or a coil spring.

In addition, rails (not shown) are installed between the support pipes P2, P2 on the gable side of the vinyl greenhouse H, along the upper and lower frames of the opening. A pair of doors D, D are installed so that they can slide freely along the rails, allowing the opening of the vinyl greenhouse H to be opened and closed by the doors D. The number of doors D is not particularly limited, and may be determined appropriately depending on the size of the opening.

In addition, in this embodiment, the door D is a sliding door, but the opening and closing direction of the door D is not particularly limited, and for example, the door D may be a hinged door. Note that the opening and the door D need only be provided on at least one end surface of the greenhouse H, but may also be provided on both end surfaces.

As shown in Figures 1 and 2, the greenhouse body 10 is equipped with a ridge member 5 that spans between the upper parts of the tops of the arch pipes P1 and extends along the depth direction. This ridge member 5 has roof side sheet fixing frames 5a, 5a that are provided on the left and right sides when viewed from the depth direction and can be used to spread out one end of the roof side sheet S3, and a shading sheet fixing frame 5b that is provided at the upper end and can be used to fix the shading sheet 2 described below.

When viewed from the depth direction, roof side sheets S3 are fixed between the roof side sheet fixing frame 5a on the right side of the ridge material 5 and the right side upper frame F1, and between the roof side sheet fixing frame 5a on the left side of the ridge material 5 and the left side upper frame F1. As a result, in this embodiment, two roof side sheets S3, S3 are stretched from the top of the greenhouse body 10 to each side on both sides of the roof sandwiching the top of the greenhouse body 10.

Therefore, in this embodiment, if a portion of the roof side sheets S3, S3 deteriorates or becomes damaged, it is only necessary to replace the deteriorated or damaged roof side sheet S3.

Therefore, compared to covering the roof surface of the vinyl greenhouse H with a single roof-side sheet, the labor required to replace the roof-side sheet S3 and the costs of replacing the sheets, including material costs, can be reduced. The roof surface of the vinyl greenhouse H may be covered with a single sheet.

In this embodiment, the covering sheet S is a soft sheet such as a polyolefin film such as a vinyl chloride film or a PET film, but a hard sheet such as a polyester film or a fluorine film may also be used.

In addition, in this embodiment, a single-building vinyl greenhouse H that is installed independently is described, but the vinyl greenhouse H may be a row-type greenhouse in which multiple buildings are lined up side by side in the width direction.

Next, the shading device 1 will be described in detail. As shown in Figures 1 and 2, the shading device 1 of this embodiment includes a shading sheet 2 whose central portion is fixed to the shading sheet fixing frame 5b of the ridge material 5 and which straddles the top of the greenhouse body 10 to cover the roof side sheet S3 from above, a winding shaft 3 attached to each end of the shading sheet 2 and capable of rolling on the roof surface of the greenhouse body 10, and two driving devices 6 which drive each winding shaft 3.

The drive device 6 is equipped with a motor 60 that is installed on the ground G on the gable side of the vinyl greenhouse H via a holder 8 so as to be rotatable around an axis that runs in the depth direction of the vinyl greenhouse H, an extendable rod 61 that is connected to the output shaft of the motor 60 and rotates in the circumferential direction in accordance with the drive of the output shaft of the motor 60 and is extendable in the axial direction, and a conversion mechanism 62 that is provided between the upper end of the extendable rod 61 and one end of the winding shaft 3 and converts the circumferential rotational motion of the extendable rod 61 into rotational motion around the axis of the winding shaft 3 and transmits it to the winding shaft 3.

Next, the operation of the shading device 1 will be described. First, when the shading sheet 2 is unwound from the winding shaft 3, the motor 60 is rotated in the forward direction to rotate the telescopic rod 61 connected to the output shaft of the motor 60 in the forward direction. Then, the rotational motion of the telescopic rod 61 is converted to the rotational motion of the winding shaft 3 by the conversion mechanism 62, so that the telescopic rod 61 contracts as the distance between the motor 60 and the winding shaft 3 shortens, while the winding shaft 3 rolls toward the side of the vinyl greenhouse body 10, and the shading sheet 2 is unwound from the winding shaft 3. Then, when the winding shaft 3 reaches near the side of the vinyl greenhouse body 10 as shown on the left side in FIG. 2, the shading sheet 2 is in an expanded state in which it covers a predetermined range from the top of the vinyl greenhouse body 10 to one side, thereby reducing the amount of sunlight entering the vinyl greenhouse H.

Conversely, when winding the shading sheet 2 onto the winding shaft 3, the motor 60 is rotated in the reverse direction to rotate the telescopic rod 61 connected to the output shaft of the motor 60 in the reverse direction. Then, the rotational motion of the telescopic rod 61 is converted into the rotational motion of the winding shaft 3 by the conversion mechanism 62, so that the telescopic rod 61 extends as the distance between the motor 60 and the winding shaft 3 increases, while the winding shaft 3 rolls toward the top of the greenhouse body 10, and the shading sheet 2 is wound onto the winding shaft 3. Then, when the winding shaft 3 reaches near the top of the greenhouse body 10 as shown on the right side in FIG. 2, the shading sheet 2 enters the stored state in which it is wound up near the top of the greenhouse body 10, and sunlight enters the greenhouse H without being blocked by the shading sheet 2.

The shading device 1 of this embodiment can therefore adjust the amount of sunlight entering the greenhouse H by driving the winding shaft 3 with the drive device 6 to unfold or retract the shading sheet 2.

The above-mentioned configuration of the drive device 6 is just one example, and the configuration of the drive device 6 is not particularly limited as long as it can roll the winding shaft 3 on the roof surface of the vinyl greenhouse body 10. For example, a motor may be attached directly to the end of the winding shaft 3 so that the motor moves together with the winding shaft.

The material and structure of the shading sheet 2 are not particularly limited, so long as it is flexible enough to be wound around the winding shaft 3 and can reduce the amount of sunlight that passes through. For example, the shading sheet 2 may be made of a material with a high light-blocking rate or may be formed in a mesh pattern.

In addition, in this embodiment, as shown in FIG. 2, a band 4 capable of pressing the shading sheet 2 against the greenhouse body 10 from above is installed along the width direction of the greenhouse body 10.

This band 4 is placed above the shading sheet 2 with a certain degree of tension, so even if the shading sheet 2 is blown by the wind, the band 4 presses the shading sheet 2 against the arch pipe P1, preventing the shading sheet 2 from flapping.

In addition, in this embodiment, as shown in FIG. 1, the bands 4 are installed at three locations at a predetermined interval along the depth direction of the vinyl greenhouse H, but the number of bands 4 installed and the installation interval are not particularly limited and may be determined appropriately depending on the depth direction length of the vinyl greenhouse H and climatic conditions such as wind strength in the area where the vinyl greenhouse H is installed.

In detail, as shown in Figs. 1 and 2, the band 4 in this embodiment is a wide elastic band, the center of which is supported by the shading sheet fixing frame 5b of the ridge material 5, and each end of which straddles the top of the greenhouse body 10 and is fixed to the upper frame F1 provided on each side, which is part of the side surface of the greenhouse body 10.

The upper frame F1 is a frame material having two grooves F1a and F1b arranged vertically, as shown in FIG. 3. Note that, in reality, the upper end of the side sheet S1 is fixed to the lower groove F1b via an elastic member, but in FIG. 3, the side sheet S1 is omitted for ease of understanding.

As shown in FIG. 4, each end of the band 4 is supported at a position spaced from the side of the greenhouse body 10 toward the outdoors by a support member 7 attached to the upper groove F1a of the upper frame F1, and is fixed to the lower groove F1b via an elastic member 15 made of a corrugated metal spring.

In addition, as shown on the left side of Figure 2, the support member 7 is fixed to the upper frame F1, which is located below the lower end of the shading sheet 2 when it is fully unrolled (unfolded) by the winding shaft 3 on the side of the greenhouse body 10, so that the winding shaft 3 does not interfere with the support member 7 when the shading device 1 is unrolled.

In detail, as shown in FIG. 3, the support member 7 of this embodiment is formed by bending a metal wire, and includes a support part 70 that is roughly U-shaped and has a recess 70a in the center that is slightly wider than the width of the band 4, and a pair of fixing parts 71, 71 that are provided at each end of the support part 70 and can be fixed to the upper groove F1a of the upper frame F1.

As shown in FIG. 4, the fixing portion 71 is formed in a wave-shaped spring shape, and when inserted into the upper groove F1a of the upper frame F1, it exerts a resilient force and is fixed in the upper groove F1a of the upper frame F1.

Therefore, as shown in FIG. 4, by fixing the pair of fixing parts 71, 71 to the upper groove F1a of the upper frame F1, the support member 7 is attached to the upper frame F1 with the support part 70 protruding from the opening of the upper groove F1a.

Next, the method of attaching the band 4 will be explained. First, the band 4 is hung in the width direction of the greenhouse body 10 across the ridge material 5 that is installed at the top of the arch pipe P1 and to which the roof side sheet S3 and the shading sheet 2 are fixed. Next, one end of the band 4 is inserted into the lower groove F1b of the upper frame F1 while being accommodated and aligned within the recess 70a of the support part 70 of the support member 7 attached to the upper groove F1a of one of the upper frames F1. In this state, an elastic member 15 is inserted into the lower groove F1b from above the band 4, and one end of the band 4 is fixed to the upper frame F1 by the elastic force of the elastic member 15.

In this embodiment, the band 4 is accommodated in the recess 70a provided in the support portion 70 of the support member 7, and the end of the band 4 can be fixed to the upper frame F1 while preventing lateral displacement of the band 4, making it easier to attach the band 4. However, the recess 70a may be omitted from the support portion 70.

Then, the other end of the band 4 is fixed in the groove F1b on the lower side of the other upper frame F1 in the same manner as the one end of the band 4. Then, the band 4 is supported at each end by the support members 7 at a position spaced from the side of the vinyl greenhouse H toward the outside, and the center is supported by the shading sheet fixing frame 5b of the ridge material 5 at a position spaced upward from the top of the vinyl greenhouse body 10, and is then stretched across the top of the vinyl greenhouse body 10 between the left and right sides of the vinyl greenhouse body 10.

In this state, each end of the band 4 is supported by the support member 7 at a position spaced from the side of the vinyl greenhouse H toward the outside. Then, near the side of the vinyl greenhouse body 10, the band 4 is spaced from the side of the vinyl greenhouse body 10, so the force (pressing force) with which the band 4 near the side of the vinyl greenhouse body 10 presses the shading sheet 2 toward the vinyl greenhouse body 10 is smaller than when the support member 7 is not provided. Therefore, when the shading device 1 unfolds or stores the shading sheet 2, the frictional force generated between the band 4 and the shading sheet 2 and the frictional force generated between the shading sheet 2 and the winding shaft 3 can be reduced, so that deterioration of the shading sheet 2 can be suppressed. In addition, when the shading device 1 unfolds or stores the shading sheet 2, the force required to drive the winding shaft 3 can be reduced.

In addition, in this embodiment, the center of the band 4 is supported by the shading sheet fixing frame 5b of the ridge material 5 at a position spaced upward from the top of the greenhouse body 10. As a result, the band 4 is spaced from the top of the greenhouse body 10 even near the top of the greenhouse body 10, so the pressing force of the band 4 is smaller, especially near the top of the greenhouse body 10, compared to when the ridge material 5 is not provided.

As a result, the friction generated between the light-blocking sheet 2 and the winding shaft 3 can be further reduced when the light-blocking device 1 unfolds or retracts the light-blocking sheet 2, thereby suppressing deterioration of the light-blocking sheet 2. In addition, the force required to drive the winding shaft 3 can be reduced when the light-blocking device 1 unfolds or retracts the light-blocking sheet 2.

In addition, instead of the support member 7, a support member 700 of the form shown in FIG. 5 may be attached to the upper frame F1. As shown in FIG. 5, FIG. 6, and FIG. 7(A), the support member 700 of the modified example is formed by bending a metal wire, and includes a pair of fixing parts 710, 710 fixed to the upper groove F1a of the upper frame F1, a pair of standing parts 720, 720 that are elastic and stand up from the opposing ends of each fixing part 710 toward the outdoor side of the vinyl greenhouse body 10, and a support part 730 that extends along the depth direction of the vinyl greenhouse body 10, connects the tips of the standing parts 720, has a recess 730a in the center that is slightly wider than the width of the band 4, and supports one end of the band 4 with the recess 730a.

As shown in FIG. 5, each standing portion 720 has a straight piece 720a that stands straight from the end of the fixed portion 710, and an inclined piece 720b that extends at an angle from the tip of the straight piece 720a.

As shown in Figures 6 and 7(A), when the pair of fixing parts 710 are fixed to the grooves F1a of the upper frame F1 with the tips of the inclined pieces 720b facing upward, the pair of straight pieces 720a, 720a extend from the ends of each fixing part 710 toward the outdoor side of the greenhouse body 10 and are arranged side by side along the depth direction of the greenhouse body 10, and the pair of inclined pieces 720b, 720b incline from the tips of each straight piece 720a toward the top side of the greenhouse body 10.

As a result, the support portion 730 that supports the band 4 is supported by a pair of upright portions 720, making the support member 700 stable and preventing the support member 700 from wobbling.

In addition, since the tip of the standing part 720 is provided with a support part 730 that supports the end of the band 4, a pressing force acts on the standing part 720 toward the vinyl house body 10 side, but as shown in FIG. 7 (A), the straight piece 720a is arranged along the normal line L of the vinyl house body 10 that passes through the base end of the standing part 720 (the base end of the straight piece 720a), and the support part 730 that directly supports the band 4 is located closer to the top of the vinyl house body 10 than the normal line L. The support part 730 is pressed toward the arch pipe P1 by the tension of the band 4, but since the line of action of the pressing force that the support part 730 receives from the band 4 is shifted from the axial direction of the straight piece 720a, the standing part 720 receives a moment that tilts it toward the top of the vinyl house body 10 by the pressing force of the band 4, with the base end, which is the connection part with the fixing part 710, as a fulcrum.

In this embodiment, the band 4 is supported by the ridge material 5 and the support member 700 at a position spaced from the greenhouse body 10 toward the outdoors, and is pressed toward the outdoors by the roll 2A of the shading sheet 2 arranged between the ridge material 5 and the support member 700. Therefore, when the diameter of the roll 2A of the shading sheet 2 increases, the band 4 is pressed by the roll 2A in a direction away from the roof surface of the greenhouse body 10 accordingly, and the pressing force of the band 4 increases due to the reaction force, and conversely, when the diameter of the roll 2A of the shading sheet 2 decreases, the pressing force of the band 4 decreases.

Therefore, when the shading device 1 winds up the shading sheet 2 near the top of the arch pipe P1, increasing the diameter of the roll 2A of the shading sheet 2, and the pressing force of the band 4 reaches a certain level or greater, the standing portion 720 elastically deforms so as to fall toward the top of the greenhouse body 10, with the base end, which is the connection point with the fixing portion 710, as a fulcrum, as shown in Figure 7 (B).

As a result, the support part 730 supporting one end of the band 4 approaches the ridge member 5 supporting the center of the band 4, loosening the band 4 accordingly, and the pressing force of the band 4 decreases.

Therefore, with the support member 700 configured in this manner, when the diameter of the roll 2A of the shading sheet 2 increases and the pressing force of the band 4 becomes particularly large, the standing portion 720 elastically deforms so as to fall toward the top side of the greenhouse body 10, thereby reducing the pressing force of the band 4, and therefore the frictional force generated between the band 4 and the shading sheet 2 and between the shading sheet 2 and the winding shaft 3 can be effectively reduced.

The timing at which the support member 700 elastically deforms can be adjusted as appropriate by changing the diameter of the wire or the length of the standing portion 720.

The shape of the support member 700 in this modified example is not particularly limited as long as the tip of the standing portion 720 is located above the normal line L of the greenhouse body 10 that passes through the base end of the standing portion 720. For example, the standing portion 720 may be shaped to curve in a bow shape upward from the fixed portion 710, or to extend obliquely upward from the fixed portion 710.

The shape of the support member 7, 700 described above is merely an example, and is not limited to the above-mentioned shape as long as it can support the end of the band 4 at a position spaced apart from the greenhouse body 10 on the outdoor side. In addition, the method of attaching the support member 7 to the greenhouse body 10 is not limited to the above-mentioned method, and it may be directly connected to the arch pipe P1, for example.

The method for attaching the ends of the bands 4 to the sides of the greenhouse body 10 is not limited to the method described above, and the bands 4 may be attached to a location other than the upper frame F1.

In addition, in this embodiment, one band 4 is hung from one side to the other side of the greenhouse body 10, but one band 4 may be hung from one side to the top of the greenhouse body 10 and one from the other side to the top of the greenhouse body 10. In this case, the upper end of the band 4 may be fixed to the shading sheet fixing frame 5b of the ridge material 5. The band 4 may be a single sheet, for example a net-like sheet, with each end of the band 4 attached to each upper frame F1, F1 so that the band 4 covers the entire roof surface of the greenhouse body 10.

As described above, the support member 7 of this embodiment is installed in a vinyl greenhouse H that includes a vinyl greenhouse body 10 as an arch-shaped simplified structure body having arch pipes P1 as a plurality of arch-shaped aggregates arranged along the depth direction and a covering sheet S stretched over the arch pipes P1, a shading sheet 2 as a sheet covering the roof surface of the vinyl greenhouse body 10 from above, a winding shaft 3 attached to one end of the shading sheet 2 and rolling over the roof surface of the vinyl greenhouse body 10 to wind and unwind the shading sheet 2, and a band 4 installed along the width direction of the vinyl greenhouse body 10 and capable of pressing the shading sheet against the vinyl greenhouse body 10 from above. The support member 7 is installed below the lower end of the shading sheet 2 in a state where it is unwound to the maximum extent by the winding shaft 3 on the side of the vinyl greenhouse body 10, and supports one end of the band 4 at a position spaced apart from the side of the vinyl greenhouse body 10 to the outdoors.

When the support member 7 configured in this manner is attached to the side of the greenhouse body 10, one end of the band 4 can be moved away from the side of the greenhouse body 10 to the outdoors. This reduces the force with which the band 4 presses the shading sheet 2 toward the greenhouse body 10 near the side of the greenhouse body 10 compared to when the support member 7 is not provided. Therefore, when the shading device 1 as a sheet winding device installed in the greenhouse H unfolds or stores the shading sheet 2, the frictional force generated between the shading sheet 2 and the winding shaft 3 can be reduced, so that deterioration of the shading sheet 2 can be further suppressed. In addition, the force required to drive the winding shaft 3 can be further reduced when the shading device 1 unfolds or stores the shading sheet 2.

In this embodiment, the sheet covering the roof surface of the greenhouse body 10 is the shading sheet 2, but the sheet may also be an opening and closing sheet that covers an opening window provided in part of the roof surface of the greenhouse body 10, and the sheet winding device may be a ventilation device that ventilates the greenhouse H.

In addition, the shading sheet 2 and the above-mentioned opening and closing sheet, etc., only need to cover a specified area of the roof surface of the greenhouse body 10, and do not need to cover the entire roof surface.

The support member 700 of the modified example includes a fixed portion 710 that is fixed to the side of the greenhouse body 10, an elastic standing portion 720 that stands from the fixed portion 710 toward the outdoor side of the greenhouse body 10, and a support portion 730 that is provided at the tip of the standing portion 720 and supports one end of the band 4, and the tip of the standing portion 720 is located above the normal line L of the greenhouse body 10 that passes through the base end of the standing portion 720.

According to this configuration, the support part 730, which is provided at the tip of the standing part 720 and directly supports the band 4, is located closer to the top of the greenhouse body 10 than the normal line L of the arch pipe P1 that passes through the base end of the standing part 720. Therefore, the support part 730 is pressed toward the arch pipe P1 by the tension of the band 4, but since the line of action of the pressing force that the support part 730 receives from the band 4 is offset from the axial direction of the straight piece 720a, the standing part 720 receives a moment that tilts it toward the top of the greenhouse body 10 by the pressing force of the band 4, with the base end, which is the connection part with the fixing part 710, as a fulcrum.

Therefore, when the diameter of the roll 2A of the shading sheet 2 increases during winding and the pressing force of the band 4 reaches a certain level or greater, the standing portion 720 elastically deforms so as to fall toward the top of the greenhouse body 10, and the support portion 730 supporting one end of the band 4 approaches the top of the greenhouse body 10, loosening the band 4 accordingly and reducing the pressing force of the band 4.

Therefore, with the support member 700 configured in this manner, when the pressing force of the band 4 becomes particularly large when the light blocking sheet 2 is being wound up, the pressing force of the band 4 can be reduced, so that the frictional force generated between the band 4 and the light blocking sheet 2 and the frictional force generated between the light blocking sheet 2 and the winding shaft 3 can be effectively reduced.

In addition, in the support member 700 of this modified example, the standing portion 720 has a pair of straight pieces 720a, 720a that extend from the fixing portion 710 toward the outdoor side of the greenhouse body 10 and are arranged side by side along the depth direction of the greenhouse body 10, and a pair of inclined pieces 720b that extend from the tip of each straight piece 720a and are inclined upward from the tip of the straight piece 720a, and the support portion 730 extends along the depth direction of the greenhouse body 10 and connects the tips of each inclined piece 720b.

With the support member 700 configured in this manner, by arranging the straight piece 720a along the normal line L, it is easy to position the tip of the standing portion 720 above the normal line L. In addition, since the support portion 730 that supports the band 4 is supported by a pair of standing portions 720, the support member 700 is stable and can be prevented from shaking.

In this embodiment, the support members 7, 700 are formed by bending a metal wire, but they may be formed by other methods. Also, the support members 7, 700 may be made of materials other than metal.

In addition, in this embodiment, a vinyl greenhouse H has been described as an example of a simple structure, but the simple structure may be a greenhouse or a simple warehouse, etc., and is not limited to a vinyl greenhouse H.

The above describes in detail the preferred embodiment of the present invention, but it is understood that modifications, variations and changes can be made without departing from the scope of the claims.

2: Shading sheet (sheet), 3: Winding shaft, 4: Band, 7,700: Support member, 10: Vinyl house body (simple structure body), 710: Fixed part, 720: Standing part, 720a: Straight piece, 720b: Inclined piece, 730: Support part, H: Vinyl house (simple structure), L: Normal line, P1: Arch pipe (aggregate), S: Covering sheet

Claims (3)

A support member is provided on a simple structure comprising: an arch-shaped simple structure body having a plurality of arch-shaped aggregates arranged in the depth direction and a covering sheet stretched over the aggregates; a sheet covering a predetermined area of the roof surface of the simple structure body from above; a winding shaft attached to one end of the sheet and rolling over the roof surface of the simple structure body to wind and unwind the sheet; and a band installed along the width direction of the simple structure body and capable of pressing the sheet against the simple structure body from above, the support member being provided on the simple structure and supporting one end of the band,
A support member characterized by being located below the lower end of the sheet when it is fully unwound by the winding shaft on the side of the simple structure body, and supporting one end of the band at a position spaced away from the side of the simple structure body toward the outdoors. A fixing part fixed to a side part of the simplified structure body;
an elastic upright portion that stands from the fixed portion toward the outdoor side of the simplified construction body;
a support portion provided at a tip of the upright portion and supporting one end of the band,
The support member according to claim 1, characterized in that the tip of the standing portion is located above a normal line of the simplified construction body that passes through the base end of the standing portion. The standing portion is
A pair of straight line pieces extending from the fixing portion toward the outdoor side of the simple structure body and arranged side by side along the depth direction of the simple structure body;
a pair of inclined pieces extending from the tip of each of the straight pieces and inclined upward from the tip,
The support portion is
The support member according to claim 2, characterized in that it extends along the depth direction of the simplified construction body and connects the tips of the inclined pieces together.

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