JP2023167433A - Hold for winding shaft of vinyl greenhouse and vinyl greenhouse - Google Patents

Abstract

To provide a hold for a winding shaft that has high durability and can hold the winding shaft with enhanced strength.SOLUTION: The present invention provides a hold that receives a winding shaft for opening and closing a vinyl greenhouse. The hold includes a shaft housing part and a mounting part. The mounting part is vertical. The shaft housing part includes: a curved part that bends from a lower end of the mounting part and curves outward to form a housing space whose lower side is opened; and a drooping part that droops from the curved part. The hold is made of synthetic resin, in which a metal plate is inserted into at least a bent part between the mounting part and the shaft housing part.SELECTED DRAWING: Figure 2

Description

The present invention relates to a technology related to agricultural greenhouses. In particular, the technology relates to the winding of a sheet that is used as a covering material for a greenhouse to open and close it for temperature control.

In general, vinyl greenhouses are usually equipped with a ventilation device on the side of the greenhouse in order to adjust the temperature and humidity inside the greenhouse to support the proper growth of plants.

As shown in Figure 1, as a ventilation system on the side of a greenhouse, the lower end of the side sheet 3 stretched on the side of the greenhouse 4 is wound around the hoisting shaft 2, and the side sheet is rolled up upward from near the ground. This forms an opening 53 for ventilation on the side of the greenhouse.

The hoisting shaft 2 rotates the hoisting machine 22 via a manual or electric rotary drive device that is attached to a guide rod 23 that stands up at the corner of the greenhouse so as to be able to move up and down, and rotates the sheet onto the hoisting shaft 2. The opening 53 is opened by winding it up, and the opening 53 is closed by winding it back.

The side sheet 3 may flap when exposed to strong winds, and the hoisting shaft 2 may sway greatly.
For this reason, a pressing band 62 has conventionally been provided to suppress the outer surface of the side sheet to prevent flapping of the sheet and oscillation of the winding shaft.
However, in recent years, as greenhouses have become larger and larger, the winding shafts have become longer. For this reason, it has become difficult to effectively prevent flapping of the sheet and oscillation of the winding shaft with the restraining force of the presser band 62 alone.

Several proposals have been made to improve this.
Patent Document 1 (Japanese Utility Model Publication No. 63-095458) discloses a structure in which a sheet winding shaft is detachably attached via a hinge (see FIG. 5(c)). With this structure, there is a risk that a large load corresponding to strong winds will concentrate on the hinge, causing the hinge to open and the hoisting shaft to come off.

In addition, in order to fix the hoisting shaft 103, it is necessary to rotate the grip pieces of each holder to accommodate the hoisting shaft with the opening open, and then rotate the grip pieces to close the opening. There is a need. Providing a plurality of holders is cumbersome and significantly reduces operability.
Patent Document 2 (Utility Model Application Publication No. 05-043842) proposes a hoisting shaft holder in which a large number of hooks are attached to a long hook attachment shaft inserted through a support ring fixed to a vertical member of a greenhouse. (See Figure 5(d)). With this holder, the sheet is loosened once, the hook is rotated so as to cover the winding shaft, the winding shaft is rotated to wind up the sheet, and tension is applied to the sheet so that the hook is attached to the hook. It is not necessarily easy to operate.
In addition, the long hook attachment shaft to which a large number of hooks are attached is inserted through a support ring fixed to the vertical members of the greenhouse, and is not directly fixed to the greenhouse members and is in a floating state. Therefore, the fixation of the hook to the greenhouse is not very strong.

Patent Document 3 (Japanese Unexamined Patent Publication No. 09-037659) discloses a holder formed by bending a front piece of a wire material whose rear piece is a wave spring that is fitted into a mounting rail, and an engagement hole at the tip of the holder. A hoisting shaft holding mechanism is disclosed in which the hoisting shaft is accommodated in a downwardly opened housing portion formed by a connecting pipe that communicates with the hoisting shaft (see FIG. 5(b)). This holder has a weak fixing force, so it is held down using a film holding string that is freely wrapped around the outer periphery of the greenhouse.
Patent Document 4 (Japanese Patent No. 5798464) discloses a mounting portion with an open bottom end that is attached to a ridge-direction member of a greenhouse using a fastener, and a sheet winding shaft accommodating portion extending from one open edge of the mounting portion. In the greenhouse sheet flapping prevention member, the sheet winding shaft accommodating portion guides the sheet winding shaft that has been unwound along the outer surface toward the outdoors and downward, and also A sheet flapping prevention member has been proposed that uses the tension of the sheet to hold the sheet winding shaft on its inner surface. This sheet flapping prevention member has a mounting part bent in a U-shape, and is hooked onto a rod-shaped fixing material from above and tightened at the rear with a tightening tool. (See FIG. 5(a)).

The applicant has created a large-scale cultivation greenhouse by devising the pipe material that serves as the framework and the structure inside the greenhouse. For example, Patent Document 5 (Patent No. 6247046) proposes octagonal arch materials and pillar materials, and Patent Document 6 (Patent No. 6621588) proposes the arrangement of cross tie bars.
With the recent increase in the size of greenhouses, the influence of strong winds has become greater, increasing the risk of deformation and collapse of greenhouses. Although the skeletal structure of vinyl greenhouses has been strengthened, it has been found that when wind enters the greenhouse, the internal pressure inside the greenhouse increases, leading to damage to the greenhouse due to things such as sheets being turned over.

Utility Model Publication No. 63-095458 Utility Model Publication No. 05-043842 Japanese Patent Application Publication No. 09-037659 Patent No. 5798464 Patent No. 6247046 Patent No. 6621588

The present invention was made to solve these problems, and aims to improve the holding force of the hoisting shaft and to develop a highly durable hoisting shaft hold.

The present invention strengthens the fixation of a hoisting shaft against wind pressure as greenhouses become larger.
1. A hold for receiving a hoisting shaft for opening and closing a greenhouse, comprising a shaft accommodating part and a mounting part,
The mounting portion is vertical, and the shaft housing portion includes a curved portion that is bent from the lower end of the mounting portion and curved outward to form a storage space that is open at the bottom, and a hanging portion that hangs down from the curved portion. Ori,
A hold characterized in that it is made of synthetic resin and has a metal plate inserted into at least the bent portion of the mounting portion and the shaft accommodating portion.
2. Item 1. The hanging part of the shaft accommodating part is made of a soft material, and the resin of the other parts is made of a hard material. Hold as stated.
3. 1. A guide taper is formed inside the tip of the hanging portion. Or 2. Hold as stated.
4. In a greenhouse where the winding shaft rolls up the side sheet on the side of the greenhouse to open the opening,
1. Place the pillar material or horizontal member near the hoisting machine at a height slightly above the lower end of the hoisting shaft. Or 2. A greenhouse characterized by having the holds described in .
5. 4. At least the pillar material or horizontal member of the arch member to which the hold is attached is a pipe material with an octagonal cross section. The greenhouse listed.
6. 5. Further, a hold is attached to the middle part, the pillar material or the horizontal member on the opposite end side. The greenhouse listed.

1. The hold for fixing the hoisting shaft of the present invention has an improved holding force for the hoisting shaft, and has been able to realize highly durable holding of the hoisting shaft. Since a metal plate is inserted into the bent part between the mounting part and the shaft accommodating part, the elasticity and bending of the metal plate is added to the resin hold, making it possible to cope with stress concentrated in the bent part. .
As greenhouses grow larger, hoisting shafts are subject to greater impact, and a resin-made one would have problems with impact resistance, while a bent metal plate would deform due to the impact, making it impossible to deal with this problem. In the present invention, we have been able to develop a hold that can adequately accommodate large-sized greenhouses.
Placing the metal plate up to the screw holes improves the durability of the screw holes and makes the screws more secure. If the area around the screw hole is only resin, the stress applied to the hold holding the winding shaft will be concentrated on the screw hole, causing cracks in the resin, but this will be reinforced by the metal plate.
It is desirable that the metal plate is disposed up to the upper side of the curved part in the shaft accommodating part. Even if the winding shaft housed in the shaft accommodating part is shaken by wind, etc., it can be stabilized by being held down by the bending of the metal plate in the shaft accommodating part in accordance with the shaking. Note that metal fatigue and deformation occur when using only metal members, but since this hold is a composite of resin and metal, it exhibits the elasticity of metal and the rigidity of resin.
2. By forming the hanging part of the shaft accommodating part with a soft material (elastic material, elastomer), even if the stored hoisting shaft is shaken by the wind, it can absorb the impact and prevent the winding shaft from fraying. can. As a result, the hoisting shaft is prevented from popping out. Additionally, as the wind pressure increases, the hoisting shaft generates rattling vibrations, and the amplitude may increase due to resonance, but the initial vibration can be suppressed by bringing the hoisting shaft into contact with a soft material. Therefore, the stability of the hoisting shaft is improved.
3. By forming the guide taper inside the tip of the hanging portion, it becomes easier to pull the winding shaft into the inside of the shaft accommodating portion. Once the hoisting shaft is lowered from the hold, the hoisting shaft moves closer to the greenhouse, making it easier to be guided by the taper at the tip of the hold.
4. A vinyl greenhouse equipped with the hold of the present invention has improved holding stability of the hoisting shaft. Damage caused by wind damage to large greenhouses can be suppressed.
5. By using a pipe material with an octagonal cross section for greenhouses developed by the present applicant, the hold of the present invention can be fixed to the pipe material with a surface touch. In addition, multiple screws can be inserted up and down or left and right, which improves the degree of fixation and makes it suitable for large greenhouses.
The hold can be firmly fixed with screws to the bottom of the pillar material, and the hold can be installed below the sheet fixing member that fixes the hem sheet installed horizontally, so the side sheet can be lowered. By lowering the hem sheet, the width that overlaps with the hem sheet can be increased, increasing the effect of preventing wind from blowing in.
6. By installing this hold in the middle of the greenhouse or on the gable side opposite to the hoisting machine, there are more places to hold the hoisting shaft, improving the stability of the hoisting shaft, and improving the stability of the hoisting shaft. Be able to respond.

FIG. 1 is a schematic perspective view of an embodiment in which the hoisting hold of the present invention is applied to a greenhouse. FIG. 2 is a diagram of the wind-up hold of the present invention. (a) A perspective view and (b) a sectional view. FIG. 3 is a diagram showing how the winding hold is attached. (a) shows an example where it is attached to a column, and (b) shows an example where it is attached to a horizontal member. FIG. 4 is a diagram showing the process of fixing the winding shaft to the hold. (a) Diagram showing the hoisting shaft winding down operation state, (b) Diagram showing the hoisting shaft winding up in the opposite direction from the lowest end, (c) Diagram showing the hoisting shaft winding up in the opposite direction from the lowest end and in the hold state. It is a figure which shows the process of accommodation, and (d) is a figure which shows the cross section of a plastic greenhouse. FIG. 5 is a diagram showing a conventional example. Figure 6 shows an octagonal material suitable for a large greenhouse and its structure. (a) shows an example of an octagonal pipe proposed by the applicant in Patent Document 5, and (b) shows an example of a large vinyl house proposed by the applicant in Patent Document 6.

The present invention strengthens the fixation of the hoisting shaft against wind pressure as greenhouses become larger. Most greenhouses have side sheets that can be opened and closed to control the temperature. The side sheets are opened and closed by moving the winding shaft up and down while wrapping the side sheet around the winding shaft. Since the winding shaft is provided in the longitudinal direction of the side surface, it becomes longer as the greenhouse becomes larger. The present invention provides a hold that can stably fix the winding shaft of a large-sized plastic greenhouse, and a vinyl house equipped with this hold.

Holding of the hoisting shaft of the present invention will be explained with reference to FIGS. 1 to 4 showing one embodiment of the present invention.
Hold 1 is shown in FIG. (a) shows a perspective view, and (b) shows a sectional view.
The hold 1 is formed of a plate having a shaft accommodating part 11 and a mounting part 12.
The mounting portion 12 is a flat plate, and is bent and stands up from one end of the shaft accommodating portion 11. The attachment part 12 is a part for attaching the hold 1 to the pillars or horizontal members of the greenhouse. The mounting portion 12 is provided with a screw groove 12a for driving a screw in the horizontal direction. The screw groove 12a serves as a guide when driving a screw. The number of screw grooves 12a is not limited to one, but a plurality of screw grooves can be provided.

One side of the shaft accommodating part 11 protrudes outward to form a accommodating space 13 open at the bottom, and has an arcuate curved part 14 and a hanging part 15 below the curved part 14 . A guide taper 16a can be provided on the inner side of the lower edge 16 of the hanging portion 15.
The base material of the hold is a synthetic resin, and although the same resin material can be used for the entire hold, the hanging portion can be formed of an elastic and soft resin (such as an elastomer).

A thin metal plate 19 is inserted across the front and back of the bent portion 17a, which is the connecting portion between the shaft housing portion 11 and the mounting portion 12. Although the metal plate 19 is placed near the bent portion 17a, it is preferable that the metal plate 19 be placed up to the point where the screws are screwed in the mounting portion 12. On the shaft accommodating part 11 side, it is arranged on the inclined part 17 extending from the bent part 17a, and can be arranged up to this side of the curved part 14.

The material of the hold 1 is made of synthetic resin as a whole, and metal plates are inserted in front and behind the bent portion.
A hard resin is used as the resin material, and for example, ABS resin or AES resin, which is a modified material thereof, can be used.
When using a soft resin for the hanging portion, use an olefin-based or styrene-based elastomer material.

For the metal plate, an iron-based material such as stainless steel (SUS430, etc.) can be used.
There is no limit to the thickness of the metal plate as long as it can be inserted, and foil, sheet, thin plate, etc. can be used.

Regarding the size, it is sufficient that the shaft accommodating part has a size that can accommodate the winding shaft, and the mounting part has a size that allows it to be attached to a pillar or the like. Further, the width dimension W is set to be 10 cm or more, preferably about 20 to 40 cm, so that the winding shaft can be held down in a plane. Although it can be made longer, as the sheet is raised and lowered, the winding shaft may become bent and the bent winding shaft may not fit properly, reducing usability and reducing work efficiency.
For example, the height of the mounting portion may be about 10 to 60 mm, or about 30 mm. The amount of protrusion of the shaft accommodating portion 11 is set to a length that can accommodate the hoisting shaft. The overhang is set depending on the thickness of the winding shaft, but is often around 40 mm. The distance from the bent portion to the tip of the hanging portion is approximately 50 mm, and this is also preferably set larger than the diameter depending on the thickness of the winding shaft.
The thickness can be approximately 2 to 7 mm.
For resin molding, known means such as injection molding and extrusion molding can be used, and for inserting the metal plate, known means can also be used.

The hold of the present invention has metal inserted into the resin and combines the rigidity of the resin with the flexibility of the metal, giving the hold durability and high holding power to the hoisting shaft. By inserting the metal plate into the bent portion, stress concentrated at the bent portion is absorbed by the bending of the metal, and damage to the resin is prevented. Holds made by bending and forming thin metal plates are at risk of deformation due to the impact caused by the swinging of the housed hoisting shaft, or damage due to metal fatigue, but the rigidity of the resin prevents deformation. .
Extending the metal plate insert to the screw driving position of the mounting part improves resistance to stress concentrated in the screw hole. Further, the shaft accommodating portion is reinforced by inserting a metal plate up to the upper part of the curved portion.
As greenhouses become larger, the hoisting shaft receives a large impact from wind power, but the hold of the present invention can generate a stable holding force.

Furthermore, by forming the hanging portion of the shaft accommodating portion from a soft material, even if the housed hoisting shaft is swayed by the wind, the impact can be absorbed and fraying of the hoisting shaft can be suppressed. As a result, the hoisting shaft is prevented from popping out from below. Additionally, as the wind pressure increases, the hoisting shaft generates rattling vibrations, and the amplitude may increase due to resonance, but the initial vibration can be suppressed by bringing the hoisting shaft into contact with a soft material. Therefore, the stability of the hoisting shaft is improved.
By forming the guide taper inside the tip of the hanging portion, it becomes easier to pull the winding shaft into the inside of the shaft accommodating portion. Once the hoisting shaft is lowered from the hold, the hoisting shaft moves closer to the greenhouse, making it easier to be guided by the taper at the tip of the hold. When the hoisting shaft does not enter the hold, it is necessary for a worker to guide it to the shaft accommodating part, but the present invention can reduce such work. In particular, as the vinyl greenhouse becomes larger and the winding shaft becomes longer, the winding shaft tends to become curly, making it difficult to fit the winding shaft into the hold, so the usefulness of guidance using a taper increases.
In a plastic greenhouse equipped with the hold of the present invention, the stability of holding the hoisting shaft is improved, so that damage to a large plastic greenhouse due to wind damage can be suppressed.

By using a pipe material with an octagonal cross section for greenhouses developed by the present applicant, the hold of the present invention can be fixed to the pipe material with a surface touch. Holds can be attached to pillars and horizontal members. For pillars made of octagonal pipes, there is no limit to the height at which the hold can be stopped, and if the hold is provided at a height that increases the width of overlap with the hem sheet, the effect of preventing wind from blowing will be enhanced.
Furthermore, since multiple screws can be driven vertically or horizontally, the degree of fixation can be improved and a large-sized vinyl greenhouse can be realized. The screws can be driven left and right or up and down, and when three or more screws are driven in parallel, the resistance against twisting and twisting is better than when two screws are used.
By installing this hold in the middle of the greenhouse or on the gable side opposite to the hoisting machine, there are more places to hold the hoisting shaft, improving the stability of the hoisting shaft, and improving the stability of the hoisting shaft. Can adapt.

FIG. 1 shows an example in which the hoisting hold of the present invention is applied to a greenhouse.
The greenhouse 4 is a typical example of a single building type.
A large number of arch members 41 consisting of pillar parts 43 and roof arches 42 are arranged in the direction of the ridge, and girders (horizontal members) such as ridge members are provided in the direction of the ridge to connect the arch members, forming gable parts 51 at the front and rear. A skeleton is formed. A plastic house is formed by covering the surface of this skeleton with a sheet. The sheet is formed of a roof sheet 33, a side sheet 3, a hem sheet 32, a side sheet 31, and the like. These sheets are fixed in grooves of the sheet fixing material 61 using spring materials, for example. The side sheet 3 has an upper side fixed and a lower side wrapped around the winding shaft 2 so that it can be opened and closed.
The hoisting shaft 2 is rotated by a hoisting machine 22 provided on the end side. The winding machine 22 is guided by a vertically erected guide rod 23, and is raised as the sheet is wound up and lowered as it is unwound. A guide rod may also be provided on the opposite wife side, if necessary.
A pressing band 62 is stretched in a zigzag pattern on the side surface of the greenhouse 4 by being hooked onto band hooks 63 provided above and below. The side sheet 3 moves up and down between the presser band 62 and the column part 43. Since the pressing band 62 holds down the side sheet 3 in a state in which the side sheet 3 is rewound, wind does not enter into the greenhouse under normal conditions. The band hook 63 is attached to the purlin material 45 on the top and the sheet fixing material 61 holding down the hem sheet on the bottom.

In this example, the hold 1 is attached to the pillar portion 43 or the horizontal member so that the hoisting shaft 2 can be held in the unwound state. A plurality of attachment points can be provided in the longitudinal direction of the ridge. In particular, it is important to stabilize the end side, so it is attached at a location close to the guide rod 23 (close to the end).
Since the hold 1 protrudes from the side of the house, once the winding shaft is lowered below the hold 1 and rolled up a little, the winding shaft is accommodated in the storage space formed by the shaft housing part of the hold.
However, if the winding shaft is long and the sheet is wound unevenly, the winding shaft may become distorted. However, the hold of the present invention is not a continuous body but is arranged at intervals, so that each part The hoisting shaft can be pushed into the curved space.

In the gable part 51, a gable sheet 34 is stretched over the frame of the gable part, an opening/closing door 52 is installed in the center, and an entrance/exit 5 to the greenhouse is provided.

Figure 3 shows how the hoisting hold is installed.
(a) is an example in which the hold 1 is attached to the column part 43 with an attachment screw 64. The column portion 43 uses an octagonal tube material (see Patent Documents 5 and 6). Since the octagonal pipe material is in surface contact with the plate-shaped mounting portion 12, a stable mounting state is achieved. When attached to the pillar portion 43, there is a high degree of freedom in the mounting height. If the hold is attached below the top edge of the hem sheet, the lower end position of the winding shaft (approximately the height of the hold) will be lower than the top edge of the hem sheet, and the overlap between the lowered side sheet and hem sheet will be lower. The larger the wrap, the greater the ability to prevent wind from entering the greenhouse.
(b) is an example in which the hold 1 is attached to a horizontal member using screws 64. Similar to the pillars, octagonal pipes are used for the horizontal members. The horizontal members are arranged horizontally, allowing the holds to be freely attached in the longitudinal direction of the greenhouse. Also, the screws can be hit laterally, improving the stability of the hold.

FIG. 4 shows the process of fixing the hoisting shaft to the hold.
FIG. 4(a) shows that when the handle of the hoist 22 is turned, the hoist 22 rises along the guide rod 23, the hoist shaft 2 winds up the side sheet, and an opening is formed on the side of the greenhouse. 53 is formed, and the room is ventilated so that the temperature in the room does not rise excessively. The outer surface of the winding shaft 2 is held down by a pressing band 62. From this state, the winding shaft 2 is rewound to close the opening 53.
FIG. 4(b) shows the operation of rewinding the winding shaft 2 to below the hold 1 and then slightly winding it up to store the hold 1. When the winding shaft 2 is rewound, the winding state of the side sheet becomes close to the initial state, so that the winding tendency is easily eliminated. However, if the winding shaft is distorted in the rewound state, correcting the winding tendency of the sheet will allow for smooth storage in the hold and opening and closing of the side sheets. Note that if the hoisting shaft cannot be stored in the hold by operating the hoisting machine 22, the hoisting shaft is manually placed in the hold.
FIG. 4(c) is an enlarged view of the operation of fixing the hoisting shaft to the hold shown in FIG. 4(b). When the hoisting shaft 2 is wound back below the hold 1, the hoisting shaft 2 descends along the outer surface of the column 43, climbs over the shaft accommodating portion 11 of the hold protruding from the column, and reaches the surface of the column. come into contact (left figure). After contacting the surface of the column, continue to rotate it in the downward direction. When this happens, the side sheet 3 fixed to the winding shaft 2 reaches its lower limit, so if it continues to wind in the same direction, a reverse winding state occurs and the winding shaft 2 winds up. If the hoisting machine 22 is rotated as it is, it will be hoisted up and the hoisting shaft will fit into the accommodation space (see the right figure). In addition, for winding, by rotating the winding machine 22 in the opposite direction, the winding shaft 2 is raised upward while winding the side sheet 3, and the opening 53 can be provided.
In particular, if a guide taper is provided at the tip of the hold, the winding shaft can be smoothly guided into the accommodation space.
FIG. 4(d) shows the states of (a) to (c) as a cross-sectional view. In the winding shaft 2, the hold 1 is at the lower position 2a of the winding shaft, and the vicinity of the upper sheet fixing material 61a to which the upper band hook is attached is the upper position 2b of the winding shaft. The gap between these is an opening height 53h at which the side sheet 3 moves up and down, and an opening 53 is formed. Note that the sheet fixing materials 61a, 61b, and 61c fix sheet materials such as a roof sheet, side sheets, and hem sheets at respective positions.

The use of holds according to the invention can be summarized as follows.
As shown in FIG. 4(a), the shaft accommodating portion 11 of this hold rotates the winding machine 22 to unwind the side sheet 3 wound around the winding shaft 2 along the pillars on the side of the greenhouse. Continuing to rotate the winding shaft 2 clockwise to completely rewind the side sheet 3, and then continuing to rotate the winding shaft 2, the side sheet will be wound up on the winding shaft 2 and rolled up, as shown in Fig. 4(b). ), the winding shaft 2 is held in the curved housing space 13 inside the shaft housing portion 11 due to the tension of the side sheet 3.
By rotating the hoisting shaft 2 in this way, the hoisting shaft 2 is automatically accommodated in the shaft accommodating part 11, so it can be fixed in the greenhouse in a short time with simple operation. .
When the winding shaft 2 is accommodated in the shaft accommodating portion 11, the opening 53 is completely closed with the tensioned side sheet 3.
Note that the winding shaft 2 is maintained at its height by the reverse rotation prevention mechanism and lock in the rotation drive device described above, and is prevented from moving downward. Since the main hold is provided, the winding shaft can be stably fixed even when exposed to strong winds, and the wind can be prevented from entering the greenhouse and causing the vinyl to collapse from inside due to wind pressure. Further, since there are bands stretched through band hooks provided at predetermined intervals on the ridge-direction member near the lower end of the hem sheet 32 and the lower end of the roof sheet 33, the sheet winding shaft 2 is further stabilized.

1 Hold 11 Shaft accommodating part 12 Mounting part 12a Screw groove 13 Accommodating space 14 Curved part 15 Hanging part 16 Lower edge part 16a Guide taper 17 Inclined part 17a Bent part 19 Metal plate

2 Hoisting shaft 22 Hoisting machine 23 Guide rod

3 Side sheet 31 Side sheet 32 Hem sheet 33 Roof sheet 34 Gable sheet

4 Plastic house 41 Arch member 42 Roof arch 43 Column part 45 Main house material

5 Entrance 51 End 52 Door 53 Opening 53h Opening height

61 Sheet fixing material 62 Pressing band 63 Band hook 64 Installation screw

Claims (6)

A hold for receiving a hoisting shaft for opening and closing a greenhouse, comprising a shaft accommodating part and a mounting part,
The mounting portion is vertical, and the shaft housing portion includes a curved portion that is bent from the lower end of the mounting portion and curved outward to form a storage space that is open at the bottom, and a hanging portion that hangs down from the curved portion. Ori,
A hold characterized in that it is made of synthetic resin and has a metal plate inserted into at least the bent portion of the mounting portion and the shaft accommodating portion. 2. The hold according to claim 1, wherein the hanging part of the shaft accommodating part is made of a soft material, and the resin of the other parts is made of a hard material. 3. The hold according to claim 1, wherein a guide taper is formed inside the tip of the hanging portion. In a greenhouse where the winding shaft rolls up the side sheet on the side of the greenhouse to open the opening,
The hold described in claim 1 or 2 is attached to a pillar member or horizontal member near the hoisting machine, at a height slightly above the lower end position of the hoisting shaft. Features a vinyl house. 5. The vinyl house according to claim 4, wherein at least the pillar material or horizontal member of the arch member to which the hold is attached is a pipe material having an octagonal cross section. 6. The vinyl greenhouse according to claim 5, further comprising a hold attached to the intermediate portion and the pillar material or horizontal member on the opposite end portion side.

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