Extension assisting structure and method for vinyl house sheet

Abstract

To provide a sheet extension assisting structure for a sheet or the like for efficiently assisting work for extending a film sheet on a large scale vinyl house.SOLUTION: A sheet extension assisting structure comprises: a standing part 12 where, a lifting pipe 10 which can be lifted freely, is arranged in a depth direction in the vicinity of a top part of a vinyl house, the standing part standing rotatably on an actuation pipe 11 which is arranged below the lifting pipe 10 and is horizontal; an inclination rotation part 13 whose one end is connected to the standing part; a rotation fulcrum part 14 which rotatably supports the inclination rotation part in a vertically rotatable manner; and a horizontal support bar 15 for supporting the rotation fulcrum part. The other end of the inclination rotation part 13 is rotatably coupled to the lifting pipe 10, the support bar 15 is formed so as to be longer than a distance between two adjacent arch pipes 2 of the vinyl house, and the support bar is arranged so as to contact the two arch pipes 2 from a lower side. By horizontally moving the actuation pipe 11, the lifting pipe 10 connected to the inclination rotation part 13 is lifted upward, therefore the sheet can be inserted into a lower space in the depth direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an auxiliary structure and method for tensioning sheets for vinyl greenhouses, and more specifically, to provide an auxiliary structure and method for tensioning film sheets that assist in the work of tensioning film sheets in large vinyl greenhouses such as cherry blossom greenhouses. [Background technology]

[0002] Cherry greenhouses, which are used to grow cherries, are large pre-assembled vinyl greenhouses that are about 3m high from the ground and about 50m long, as cherry trees become taller as they grow (see Figures 27 and 26). Furthermore, no film sheets are installed in the cherry greenhouses until the cherries ripen. Instead, film sheets are installed only for the one to two months after the cherries ripen until harvest to protect the cherries from rain, wind, and pests.

[0003] However, in the past, inside a cherry greenhouse with scaffolding pipes 6 as shown in Figure 27, a worker 30 carefully installed a film sheet. That is, because a cherry greenhouse is tall as described above, the work of installing a film sheet requires inserting the film sheet between the pipes that form the framework of the greenhouse and the greenhouse band, and then spreading the sheet after insertion. This troublesome work of inserting and spreading the film sheet has to be done for a long time at a high place (see Figures 18 and 21).

[0004] In this regard, for example, Patent Document 1 below, quoting the reference symbols therein, discloses a sheet installation tool for feeding sheets in a vinyl greenhouse, in which a leading towing frame 2, a following frame 3, and a fastening frame 4 having a fastening mechanism 41 are connected to each other by hinge mechanisms 6, 6 so as to be freely foldable, and a diving rod 5 protrudes rearward at a predetermined angle from the leading towing frame 2 (see claim 1, etc.). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2006-115722 A Summary of the Invention [Problem to be solved by the invention]

[0006] In vinyl greenhouses, especially large cherry-bomb greenhouses, workers are forced to work at high altitudes for long periods of time to insert and stretch a film sheet between the tense greenhouse band and pipes. Therefore, there is a demand for technology that can assist in sheet stretching work and reduce the time required. In this regard, the technology of Patent Document 1 is suitable for feeding the sheet in the depth direction of the house, but since the sheet feeding work is performed without lifting the sheet tensioning string 96 (house band) (see Figures 8 and 9 of Patent Document 1), workers are still forced to perform long hours of sheet tensioning work.

[0007] Therefore, the object of the present invention is to provide a structure and method for efficiently assisting the work of stretching film sheets in large vinyl greenhouses such as cherry blossom greenhouses, thereby shortening the time required for working at height and making the work safer. [Means for solving the problem]

[0008] As a means for solving the above-mentioned problems, the invention described in claim 1 is a structure that assists in the tensioning of a film sheet 4 that covers a vinyl greenhouse 5, which is composed of a large number of arch pipes 2 that constitute a greenhouse frame, standing in the depth direction, a horizontal pipe 1 that is perpendicular to the arch pipes 2, and a greenhouse band 3 that is provided parallel to the arch pipes 2 from above the horizontal pipes 1, (a) A lifting pipe 10 which is parallel to the horizontal pipe 1 and can be lifted freely is disposed in the depth direction near the top 5a of the vinyl greenhouse 5, (b) A lifting pipe 10 is provided below and parallel to a horizontal and long operating pipe 11. The lifting pipe 10 is provided with a standing portion 12 which stands rotatably on the working pipe 11. An inclined rotating portion 13 has one end 13a fixed to the standing portion 12. A rotating fulcrum portion 14 which supports the inclined rotating portion 13 so as to be rotatable up and down. A horizontal support bar 15 which fixes the rotating fulcrum portion 14 is provided. (c) the other end 13b of the inclined rotation part 13 is rotatably connected to the lifting pipe 10; (d) The support bar 15 is formed longer than the space between the two adjacent arch pipes 2, 2 of the vinyl greenhouse 5 and is disposed in contact with the two arch pipes 2, 2 from below. (e) When the multiple operating pipes 11 are moved horizontally in unison, the support bar 15 is maintained in contact with the arch pipes 2, 2, while the lifting pipe 10 and the house band 3 connected to the multiple inclined rotation parts 13 that are inclined around the rotation fulcrum part 14 as a fulcrum are lifted upward, and the film sheet 4 is inserted in the depth direction into the empty space S below so that it can be freely stretched. This is an auxiliary structure for tensioning a sheet for a vinyl greenhouse, characterized by the above.

[0009] The invention described in claim 2 is such that the rotation fulcrum part 14 is rotatably connected to the inclined rotation part 13 at a substantially middle position thereof so that the inclined rotation part 13 rotates in the up-down direction, The upper part of the pivot point portion 14 is fixed to the support bar 15. The auxiliary structure for tensioning a sheet for a vinyl greenhouse according to claim 1 is characterized in that:

[0010] The invention described in claim 3 is characterized in that a wire 20 is connected to an end of the actuation pipe 11, The wire 20 is connected to a separate wire winding device 21, The wire 20 is wound by the wire winding device 21, and the lifting pipe 10 is lifted upward as the operating pipe 11 moves horizontally. The auxiliary structure for tensioning a sheet for a vinyl greenhouse according to claim 1 or 2, characterized in that:

[0011] The invention described in claim 4 is characterized in that the upright portion 12, the inclined rotation portion 13, the rotation fulcrum portion 14, and the support bar 15 are A plurality of arch pipes are provided in the depth direction of the vinyl greenhouse 5 at a predetermined interval between the two adjacent arch pipes 2, 2 of the vinyl greenhouse 5. The auxiliary structure for tensioning a sheet for a vinyl greenhouse according to claim 1 or 2, characterized in that:

[0012] The invention described in claim 5 is a method for stretching a film sheet 4 covering a vinyl greenhouse 5, which is made up of a large number of arch pipes 2 constituting a greenhouse frame, standing in the depth direction, a horizontal pipe 1 perpendicular to the arch pipes 2, and a greenhouse band 3 arranged parallel to the arch pipes 2 from above the horizontal pipe 1, (a) A lifting pipe 10 that is horizontal and can be lifted up is disposed in parallel to the horizontal pipe 1 in the depth direction near the top 5a of the vinyl greenhouse 5, and a horizontal and long operating pipe 11 is disposed below the lifting pipe 10 in parallel to the lifting pipe 10. (b) producing a plurality of sheet tensioning auxiliary structures each including an upright portion 12 that stands rotatably on the operating pipe 11, an inclined rotating portion 13 having one end 13a fixed to the upright portion 12, a rotating fulcrum portion 14 that supports the inclined rotating portion 13 so that it can rotate up and down, and a horizontal support bar 15 of a predetermined length to which the rotating fulcrum portion 14 is fixed; (c) the other end 13b of the inclined rotation portion 13 is rotatably connected to the lifting pipe 10; (d) The step of placing the support bar 15 of the sheet-laying auxiliary structure in contact with the two adjacent arch pipes 2, 2 of the vinyl greenhouse 5 from below is performed multiple times at predetermined intervals in the depth direction of the vinyl greenhouse 5, (e) Connect a wire 20 to the end of the operating pipe 11, and connect the wire 20 to a separate wire winding device 21; (f) When the film sheet 4 is stretched, the wire 20 is wound up by the wire winding device 21, and the multiple operating pipes 11 are moved horizontally in unison while maintaining the contact state of the support bar 15 against the arch pipes 2, 2. In response to the lifting of the lifting pipes 10 connected to the multiple tilting rotation parts 13 which tilt around the rotation fulcrum parts 14 as a fulcrum, the house band 3 is lifted upward; (g) The film sheet 4 is bundled and inserted into the space S between the lift pipe 10 and the house band 3, which are raised upward, and the arch pipe 2 in the depth direction of the vinyl house 5, (h) loosening the wire 20 by the wire winding device 21, lowering the lifting pipe 10 and the house band 3 connected to the inclined rotation unit 13 downward, and spreading and stretching the film sheet 4 in a state in which the tension of the house band 3 is loosened; This is a method for stretching a sheet for a vinyl greenhouse, characterized by the above. Effect of the Invention

[0013] According to the vinyl greenhouse sheet tensioning assistance structure and tensioning method of the present invention, when the operating pipe is moved horizontally, the support bar is maintained in contact with the arch pipe while the horizontal pipe connected to the inclined rotation section is lifted upward, and a film sheet can be inserted in the depth direction into the space created below to be tensioned, thereby efficiently assisting the work of tensioning a film sheet in a large vinyl greenhouse such as a cherry blossom greenhouse, shortening the time required for working at height and achieving safe sheet tensioning work. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a front view showing the auxiliary tensioning structure of the sheet for vinyl greenhouses of the present invention. [Diagram 2] FIG. 2 is a perspective view of FIG. 1 as seen from above. [Diagram 3] 2 is a front view showing a state in which the operating pipe of the tensioning auxiliary structure in FIG. 1 is operated to lift up the lifting pipe. [Figure 4]FIG. 4 is a perspective view of FIG. 3 seen from above. [Diagram 5] FIG. 4 is a plan view of FIG. [Figure 6] 1 is a front view showing the standing portion, the inclined rotating portion, and the rotating support portion that constitute the tensioning auxiliary structure. FIG. [Figure 7] FIG. 7 is a perspective view of FIG. 6 as seen from above. [Figure 8] FIG. 7 is a plan view of FIG. 6. [Figure 9] FIG. 7 is a left side view of FIG. 6. [Figure 10] 7 is an exploded perspective view showing the standing portion, the inclined rotation portion, and the rotation support portion that constitute the tensioning auxiliary structure of FIG. 6. FIG. [Figure 11] FIG. 11 is a front view showing a state in which a connecting wire is connected to a winding device at an end of the operating pipe. [Figure 12] FIG. 12 is a perspective view of FIG. 11 seen from above. [Figure 13] FIG. 12 is a plan view of FIG. [Figure 14] FIG. 12 is a side view of FIG. [Figure 15] FIG. 4 is an enlarged perspective view of a connection member to a wire winding device; [Figure 16] This is an explanatory diagram showing a vinyl greenhouse with a tensioning auxiliary structure attached, viewed from the gable side. [Figure 17] 1 is a perspective view showing a vinyl greenhouse with a tensioning auxiliary structure attached thereto from above. FIG. [Figure 18] FIG. 13 is a diagram showing the internal structure of a vinyl greenhouse with a tensioning auxiliary structure installed. [Figure 19] 17 is an explanatory diagram showing a state in which the lifting pipe is lifted upward by operating the operating pipe from the state shown in FIG. 16. FIG. [Figure 20] FIG. 20 is a perspective view showing the operating state of FIG. 19 from above. [Figure 21] This is a diagram showing the state in the depth direction after the lifting pipe has been raised upward to create space. [Figure 22] 22 is an explanatory diagram showing the state in which the lifting pipe in FIG. 21 is lifted upward to create a space, as viewed from the end face direction. FIG. [Diagram 23] 22 is a perspective view showing a state in which a bundle of film sheets is inserted into a space created by lifting the lift pipe in FIG. 21 upward. FIG. [Figure 24] 24 is a perspective view showing the film sheet after it has been unfolded from the state shown in FIG. 23 and tensioning has been completed, as viewed from above. [Diagram 25] This is an oblique view from above showing the implementation procedure (left and center) of the tensioning auxiliary structure in a multi-unit vinyl greenhouse. [Figure 26] FIG. 1 is an explanatory diagram showing a conventional vinyl greenhouse from the gable side. [Figure 27] FIG. 27 is a perspective view showing the conventional vinyl greenhouse of FIG. 26 from above. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the auxiliary structure for tensioning a sheet for a vinyl greenhouse according to the present invention and a method for tensioning a sheet using the auxiliary structure will be described. The sheet installation auxiliary structure and method of use of this embodiment are intended to assist in the installation of a film sheet 4 in a large vinyl greenhouse 5 where trees grow tall, known as a cherry greenhouse, for cultivating cherries 7, and to shorten the time required for dangerous sheet installation work at high altitudes (see Figs. 18 and 20). That is, the film sheet 4 is not installed until the cherries 7 bear fruit, and is preferably used when installing the film sheet 4 to protect the cherries 7 from rain, wind, pests, etc., for one to two months after the cherries 7 bear fruit and until they are harvested.

[0016] The vinyl greenhouse 5 has many arch pipes 2 that constitute the greenhouse framework standing in the depth direction, horizontal pipes 1 that are perpendicular to the arch pipes 2, and greenhouse bands 3 that are installed parallel to the arch pipes 2 from above the horizontal pipes 1. For example, the overall length of a cherry greenhouse in the depth direction is about 50 m, and the height of the vinyl greenhouse 5 is about 3 m, taking into consideration the growth of the cherry trees 7. Inside the greenhouse 5, scaffolding pipes 6 are set up for laying out the film sheets 4 and for picking the cherries 7 (see Figures 16 to 21). This sheet installation auxiliary structure can be similarly implemented in both a single greenhouse as shown in FIG. 17 and a series of vinyl greenhouses 5 as shown in FIG.

[0017] The main sheet-laying auxiliary structures shown in Figs. 1 to 5 will be described. <About lifting pipe 10> The lifting pipe 10, which is slightly shorter than the horizontal pipe 1 but is a long pipe of just under 50 m, can be freely lifted and is disposed parallel to the horizontal pipe 1, one of which is disposed in the depth direction of the vinyl greenhouse 5 near the top 5a of the greenhouse 5. A plurality of greenhouse bands 3 are provided on the lifting pipe 10 (see FIG. 16). The lifting pipe 10 is lifted upward by actuating an actuating pipe 11, which will be described later, thereby lifting the house band 3 upward (see Figs. 19 and 21).

[0018] <Regarding the standing portion 12, the tilting rotation portion 13, the rotation fulcrum portion 14, and the support bar 15> The standing part 12 is disposed below and parallel to the lifting pipe 10, and is rotatably erected on the horizontal and long operating pipe 11. The inclined rotation part 13 has one end 13a fixed to the standing part 12, and is set so that the inclination angle can be freely changed with the rotation fulcrum part 14 described below as a fulcrum. The rotation fulcrum part 14 supports the inclined rotation part 13 so that it can be rotatably moved up and down. The support bar 15 fixes the rotation fulcrum part 14.

[0019] These components will be described in detail below with reference to FIGS. As shown in an exploded view in Fig. 10, the standing part 12 is a press-molded steel plate with a plate shape of about 18 cm in height. A hexagonal bolt 16 is inserted into a through hole 12b at the bottom, and the standing part 12 is rotatably fixed by a hexagonal nut 16a via a holder 12a (and a washer). The holder 12a is fixed to the operating pipe 11 as shown in Fig. 1. The tilt rotation part 13 is made of a rectangular column pipe with a length of about 64 cm, and has a through hole 13c at the center of one end 13a and the other end 13b. A fixing tool such as a hexagonal bolt 17 is inserted into the through hole 13c of the tilt rotation part 13, which is located at the same position as the two through holes 12b at the top of the standing part 12, and is firmly fixed with a hexagonal nut 17a. A hexagonal bolt 19 is inserted into the through hole 13c of the other end 13a, and is rotatably fixed by a hexagonal nut 19b with a U-shaped holder 19a (and a washer) interposed therebetween. The holder 19a is connected to the lifting pipe 10 (FIG. 3), and therefore the other end 13b of the tilt rotation part 13 is rotatable (see FIGS. 1 to 3).

[0020] The pivot point 14 is a press-molded product of steel plate, and is formed to receive the inclined pivot part 13 from below by a vertical surface part 14a and a receiving part 14b bent into an L-shape. A truss bolt 18 is inserted through a through hole 13c in the center of the inclined pivot part 13, which is at the same position as a through hole 14d drilled in the vertical surface part 14a and the L-shaped receiving part 14b, and is rotatably fixed by a hexagonal nut 18a via a washer or the like, so that the inclined pivot part 13 can pivot up and down. A U-shaped holder 14c is fixed to a through hole 14d at the upper part of the pivot point 14 by a bolt 14e or the like, and the holder 14c holds the support bar 15 and is fixed thereto. The support bar 15 is slightly longer than the distance between the two adjacent arch pipes 2, 2 of the vinyl greenhouse 5, for example, about 70 cm, and is positioned in contact with the two arch pipes 2, 2 from below, with the support bar 15 and arch pipe 2 fixed together with a fixing device 29.

[0021] The above-mentioned standing portions 12, inclined rotating portions 13, rotating fulcrum portions 14 and support bars 15 are provided in sets of, for example, 15 in the depth direction of the vinyl greenhouse 5, at intervals of approximately 3 m on each of the two adjacent arch pipes 2, 2 of the vinyl greenhouse 5 (see Figures 17, 20, 23, etc.).

[0022] <About the working pipe 11> Next, the operation of the operating pipe 11 will be described with reference to FIGS. A wire 20 is connected to the end of the operating pipe 11, and the wire 20 is connected to a wire winding device 21 separately provided on a pipe on the gable surface of the vinyl greenhouse 5 (see Figures 17 and 25). That is, as shown in an enlarged view in Figure 15, a wire winding shaft 22 connected to a wire winding device 21 has two short tubes 23 interposed therebetween, with stoppers 25 on both sides to prevent the wire 20 from coming loose, and the end of the wire 20 is fixed to the winding shaft 22 by a fixing ring 24 between the two short tubes 23, 23 (see Figure 13, etc.). Therefore, when the wire winding device 21 is operated, the wire 20 is wound and the multiple operating pipes 11 are moved horizontally in unison in unison, and the lifting pipe 10 is lifted upward by the multiple tilting rotation parts 13 which tilt in unison with the rotation fulcrum part 14 as a fulcrum.

[0023] Therefore, when the operating pipe 11 is moved horizontally as described above, the lifting pipe 10 connected to the tilting rotation part 13 and the house band 3 are lifted upward while the support bar 15 is maintained in contact with the arch pipes 2, 2, as shown in Fig. 19. Therefore, as shown in Fig. 22, the bundled film sheets 4 can be smoothly inserted into the empty space S below the lifting pipe 10 and the house band 3 that are lifted upward (Fig. 23). In other words, since the house band 3 is maintained in a state of being lifted upward, the work of inserting the film sheets 4 in the depth direction is reduced by half compared to the conventional method.

[0024] <How to install the film sheet> A method for tensioning a sheet using the above-mentioned sheet tensioning auxiliary structure will now be described. (a) As described above, the lifting pipe 10 which can be freely lifted is disposed in the depth direction near the top 5a of the vinyl greenhouse 5, and the horizontal operating pipe 11 which is parallel to the lifting pipe 10 is disposed below the lifting pipe 10. (b) Before or in parallel with setting the operating pipe 11, a plurality of sheet tensioning auxiliary structures each having the upright portion 12, the inclined rotating portion 13, the rotating fulcrum portion 14, and the support bar 15 are fabricated. (c) Next, the lower end of the standing part 12 is connected to the operating pipe 11 by the holding body 12a, while the other end 13b of the inclined rotating part 13 is rotatably connected to the lifting pipe 10 by the holding body 19a. (d) The support bar 15 is placed in position by abutting it from below against two adjacent arch pipes 2, 2 of the vinyl greenhouse 5 and fixing it with fixing members 29. The process of fixing the main components of the sheet laying auxiliary structure, namely the standing portion 12, the inclined rotating portion 13, the rotating fulcrum portion 14 and the support bar 15, across two adjacent arch pipes 2, 2 is carried out multiple times at predetermined intervals in the depth direction of the vinyl greenhouse 5. (e) Then, the wire 20 connected to the operating pipe 11 is connected to the wire winding device 21, and the sheet tensioning auxiliary structure is set up in advance (FIGS. 16 to 18). (f) Thus, when the film sheet 4 is tensioned, the wire 20 is wound up by operating the wire winding device 21, and when the operating pipes 11 are moved horizontally all at once, the house band 3 is lifted upward in response to the lifting pipe 10 connected to the inclined rotation section 13 which inclines in unison with the multiple rotation fulcrum sections 14 as fulcrums. (g) Then, as shown in Figure 22, the film sheet 4 is bundled and inserted into the space S between the lifting pipe 10 and house band 3 that have been raised upward and the arch pipe 2 in the depth direction of the vinyl greenhouse 5 (Figure 23). (h) After that, the wire 20 is loosened by the wire winding device 21, the lifting pipe 10 connected to the tilting rotation part 13 and the house band 3 are lowered downward, and the film sheet 4 is spread and stretched in a state in which the tension of the house band 3 is loosened. In this way, the film sheet 4 can be widely spread over the vinyl greenhouse 5 and stretched as shown in Figure 24 in about half the time it would take in the conventional method.

[0025] Although the embodiment has been described above based on the drawings, it should be noted that the present invention is not limited to the illustrated examples, and includes the range of design modifications and application variations that would normally be made by a person skilled in the art, provided that the scope does not deviate from the technical concept thereof. [Explanation of symbols]

[0026] 1 Horizontal pipe 2 Arch Pipe 3. House Band 4 Film Sheets 5. Vinyl greenhouse 5a Top 6 Scaffolding Pipe 7 Cherry Tree 10 Lifting pipe 11. Working pipe 12 Standing part 12a Holding body 12b Through hole 13 Tilt rotation part 13a one end 13b Other end 13c through hole 14 Pivot fulcrum 14a Vertical section 14b L-shaped receiver 14c holding body 14d through hole 14e Bolt 15 Support bar 16 Hexagon bolt 16a Hexagon Nut 17 Hexagon bolt 17a Hexagon Nut 18 Truss bolt 18a Hexagon Nut 19 Hexagon bolt 19a Holding body 19b Hexagon Nut 20 Wire 21 Wire winding device 22 Winding shaft 23 Short tube 24 Fixing ring 25 Stopper 29 Fixing member 30 Worker S Space

Claims

1. A structure that assists in the tensioning of a film sheet covering a vinyl greenhouse, in which a large number of arch pipes constituting a greenhouse frame are erected in the depth direction, horizontal pipes perpendicular to the arch pipes are arranged, and a greenhouse band is provided parallel to the arch pipes from above the horizontal pipes, (a) a lifting pipe that is parallel to the horizontal pipe, is horizontal, and can be lifted freely, is disposed in the depth direction near the top of the vinyl greenhouse; (b) a standing portion that is rotatably erected on a horizontal and long operating pipe that is arranged below the lifting pipe in parallel, a tilting rotation portion having one end fixed to the standing portion, a rotation fulcrum portion that supports the tilting rotation portion so that it can rotate freely up and down, and a horizontal support bar that fixes the rotation fulcrum portion; (c) the other end of the inclined rotation part is rotatably connected to the lifting pipe; (d) The support bar is formed longer than the distance between the two adjacent arch pipes of the vinyl greenhouse and is disposed in contact with the two arch pipes from below; (e) When the multiple operating pipes are moved horizontally in unison, the support bar is maintained in contact with the arch pipe, and the lifting pipe and the house band connected to the multiple tilting rotation parts tilting around the rotation fulcrum part as a fulcrum are lifted upward, and the film sheet is inserted in the depth direction into the empty space below so that it can be freely stretched. The auxiliary structure for tensioning a sheet for a vinyl greenhouse is characterized by the above.

2. the pivot point portion is rotatably connected to the inclined rotation portion at a substantially middle position thereof so that the inclined rotation portion rotates in a vertical direction; An upper portion of the pivot point portion is fixed to the support bar; 2. The auxiliary structure for tensioning a sheet for a vinyl greenhouse according to claim 1.

3. A wire is connected to the end of the actuation pipe; The wire is connected to a separate wire winding device, The lifting pipe is lifted upward as the wire is wound by the wire winding device and the operating pipe is moved horizontally.

3. The auxiliary structure for tensioning a sheet for a vinyl greenhouse according to claim 1 or 2.

4. The upright portion, the inclined rotation portion, the rotation fulcrum portion, and the support bar are A plurality of arch pipes are provided in the depth direction of the vinyl greenhouse at a predetermined interval between the two adjacent arch pipes of the vinyl greenhouse; 3. The auxiliary structure for tensioning a sheet for a vinyl greenhouse according to claim 1 or 2.

5. A method for stretching a film sheet covering a vinyl greenhouse, which is constructed by erecting a large number of arch pipes constituting a greenhouse frame in the depth direction, disposing horizontal pipes perpendicular to the arch pipes, and providing a greenhouse band parallel to the arch pipes from above the horizontal pipes, (a) A lifting pipe that is horizontal and can be lifted freely is disposed in parallel to the horizontal pipe in the depth direction near the top of the vinyl greenhouse, and a horizontal and long operating pipe that is horizontal and parallel to the lifting pipe is disposed below the lifting pipe. (b) producing a plurality of sheet tensioning auxiliary structures each including an upright portion that stands rotatably on the operating pipe, an inclined rotating portion having one end fixed to the upright portion, a rotating fulcrum portion that supports the inclined rotating portion so as to be rotatable up and down, and a horizontal support bar of a predetermined length that fixes the rotating fulcrum portion; (c) rotatably connecting the other end of the inclined rotation part to the lifting pipe; (d) The step of placing the support bar of the sheet tensioning auxiliary structure in contact with the two adjacent arch pipes of the vinyl greenhouse from below is performed multiple times at predetermined intervals in the depth direction of the vinyl greenhouse, (e) connecting a wire to an end of the operating pipe, and connecting the wire to a separate wire winding device; (f) When the film sheet is stretched, the wire is wound up by the wire winding device, and the multiple operating pipes are moved horizontally in unison in an interlocking manner. While the support bar is maintained in contact with the arch pipe, the house band is lifted upward in response to the lifting of the lifting pipes connected to the multiple tilting rotation parts that tilt around the rotation fulcrum part as a fulcrum. (g) The film sheets are bundled and inserted into the space between the lifting pipe and the house band raised upward and the arch pipe in the depth direction of the vinyl house, (h) loosening the wire by the wire winding device, lowering the lifting pipe and the house band connected to the inclined rotation part downward, and spreading and stretching the film sheet in a state in which the tension of the house band is loosened; A method for stretching a sheet for a vinyl greenhouse, comprising:

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