JP6960007B2 - Agricultural waterproof sheet - Google Patents

Description

The present invention relates to an agricultural waterproof sheet used in an agricultural house.

As a growing facility for agricultural products, for example, an agricultural house constructed by covering an internal space surrounded by aggregates with a glass plate, a soft sheet, or the like is known. In this agricultural house, for the purpose of keeping agricultural products warm and preventing water or the like from entering the internal space from the vicinity of the ground surface, agriculture is carried out on the side and under the wife as disclosed in Patent Document 1. A water stop sheet may be provided.

When an agricultural waterproof sheet is provided in an agricultural house, for example, a long frame member having a groove is attached to an aggregate, and a part of the agricultural waterproof sheet is put in the groove of the frame member. The spring presses the agricultural waterproof sheet against the inner wall of the groove in the groove width direction. As a result, the agricultural waterproof sheet is fixed to the frame member.

Japanese Patent No. 3114858

Agricultural waterproof sheets are manufactured so as to have a certain thickness dimension, for example, in order to have durability that can withstand long-term use, and the strength is increased. As a result, the stiffness of the agricultural water blocking sheet becomes stronger, which may reduce the workability when fixing the agricultural water blocking sheet to the frame member in the groove portion of the frame member.

Therefore, an object of the present invention is to make it possible to satisfactorily prevent a decrease in workability when fixing an agricultural waterproof sheet to a frame member.

In order to solve the above problems, the agricultural waterproof sheet according to one aspect of the present invention extends linearly in one direction along the surface, and a part of the surface is easily bent in the thickness direction. It is provided with at least one bent portion which is a portion.

According to the above configuration, since the agricultural waterproof sheet is easily bent in the thickness direction at the bent portion, it can be easily bent at the bent portion even with a small force. Therefore, for example, when a part of the agricultural waterproof sheet is inserted into the groove of the frame member, the portion of the agricultural waterproof sheet in which the bent portion is formed is arranged inside the groove to form the agricultural waterproof sheet. Can be easily placed in the groove. As a result, it is possible to prevent the agricultural waterproof sheet from popping out of the groove due to the bent repulsion. Therefore, the agricultural waterproof sheet can be easily fixed to the frame member in the groove portion of the frame member.

According to the present invention, it is possible to satisfactorily prevent a decrease in workability when fixing the agricultural waterproof sheet to the frame member.

It is a front view of the water stop sheet for agriculture which concerns on 1st Embodiment. It is a front view when it was fixed to the groove part of the frame member of the water stop sheet for agriculture of FIG. It is sectional drawing of the agricultural water stop sheet and the frame member when the agricultural water stop sheet of FIG. 1 is fixed to the groove part of the frame member. It is sectional drawing of the agricultural water stop sheet and the frame member when a part of the agricultural water stop sheet of FIG. 1 is put in the groove part of the frame member. It is sectional drawing of the agricultural water-stopping sheet and a frame member when a part of the conventional agricultural water-stopping sheet is put in the groove part of a frame member. It is a front view of the water stop sheet for agriculture which concerns on 2nd Embodiment.

Hereinafter, each embodiment of the present invention will be described with reference to each figure.

(First Embodiment)
FIG. 1 is a front view of the agricultural water blocking (water blocking) sheet 1 according to the first embodiment. FIG. 2 is a front view when the frame member 2 of the agricultural water blocking sheet 1 of FIG. 1 is fixed to the groove 2a. FIG. 3 is a cross-sectional view of the agricultural water stop sheet 1 and the frame member 2 when the agricultural water stop sheet 1 of FIG. 1 is fixed to the groove portion 2a of the frame member 2. FIG. 4 is a cross-sectional view of the agricultural water blocking sheet 1 and the frame member 2 when a part of the agricultural water blocking sheet 1 of FIG. 1 is inserted into the groove portion 2a of the frame member 2.

The agricultural waterproof sheet 1 shown in FIGS. 1 to 3 is used as a covering material for an agricultural house. The agricultural waterproof sheet 1 is arranged, for example, on the side portion and the lower portion of the wife portion of the agricultural house, and is used in a state where the lower portion is buried in the ground 20. The lower part of the agricultural water blocking sheet 1 extends vertically in the ground 20 to partition the soil between the outside and the inside of the agricultural house in a range from the ground surface to a certain depth. As a result, the agricultural waterproof sheet 1 prevents liquids such as water and small animals from invading the internal space of the agricultural house from the ground surface and its vicinity.

The agricultural waterproof sheet 1 is fixed to one or more frame members (soft film stoppers) 2 attached to the aggregate of the agricultural house. The frame member 2 has a main body portion 2b which is a long plate portion, and a pair of side portions 2c protruding from both sides of the main body portion 2b in the width direction to one side in the thickness direction of the main body portion 2b. The frame member 2 is provided with a groove portion 2a formed by a main body portion 2b and a pair of side portions 2c and extending in the longitudinal direction of the main body portion 2b. Examples of such a frame member 2 include, but are not limited to, "Vinipet" manufactured by Toto Kogyo Co., Ltd.

The agricultural waterproof sheet 1 of the present embodiment has a light-shielding property that prevents outside light from entering the inside of the agricultural house. The color of the agricultural waterproof sheet 1 is silver as an example, but it may be black, white, or the like. The agricultural waterproof sheet 1 is made of a material having flexibility and high durability (for example, polyolefin such as MCPE (metallocene-catalyzed polyethylene) or EVA (ethylene-vinyl acetate copolymer)).

The maximum thickness dimension of the agricultural waterproof sheet 1 can be set as appropriate, but as an example, it is set to a value in the range of 1 mm or less (here, 700 μm or less). Various additives such as insect repellent may be added to the agricultural water blocking sheet 1. Further, the agricultural waterproof sheet 1 does not have to have a light-shielding property. Further, the agricultural waterproof sheet 1 may be a laminated body in which two or more layers of films are laminated.

As shown in FIG. 1, the agricultural waterproof sheet 1 extends in one direction (horizontal direction in FIG. 1) along the surface, and a part of the surface is at least one (here, two) bent portions 1a. To be equipped. The bent portion 1a is a processed portion in which a part of the surface of the agricultural waterproof sheet 1 is easily bent in the thickness direction. As an example, the bent portion 1a is formed by partially recessing the agricultural waterproof sheet 1 in the thickness direction.

The bent portion 1a of the present embodiment is formed in a wavy shape in a plan view. The bent portion 1a is formed while regularly meandering in a direction perpendicular to the one direction. In a plan view, the bent portion 1a is formed in a wavy shape by bending a plurality of line segments in a zigzag pattern. In other words, in plan view, the bent portion 1a has a plurality of straight portions. In the present embodiment, the phases of the waves of the bent portions 1a are the same, but may be different.

The bent portion 1a may be formed in a linear shape, for example, instead of a wavy shape in a plan view. Further, as described above, it is preferable that the agricultural water blocking sheet 1 is partially recessed in the thickness direction of the bent portion 1a in order to obtain durability and the like. For example, the agricultural water blocking sheet 1 is used. It may be formed by penetrating intermittently (perforated) in one direction along the surface.

The bent portion 1a is formed without penetrating the agricultural waterproof sheet 1 in the thickness direction. The width dimension L1 of the bent portion 1a can be appropriately set, but is set to a value in the range of 0.5 mm or more and 10 mm or less, for example. In another example, the width dimension L1 of the bent portion 1a is set to a value larger than the outer diameter of the spring 3 described later.

The thickness dimension of the agricultural waterproof sheet 1 in the bent portion 1a can be set as appropriate, but as an example, 1/5, 1/4, 1/3 of the maximum thickness dimension of the agricultural waterproof sheet 1. Is set to a value in the range in which any of 1 is the lower limit value and any of 1/2, 2/3, 3/4 is the upper limit value.

In the agricultural waterproof sheet 1, two bent portions 1a are arranged so as to be separated from each other in a direction perpendicular to the one direction in a plan view. The shortest distance L2 between the two bent portions 1a can be appropriately set, but is set to a value in the range of, for example, 10 mm or more and 100 mm or less. In another example, the shortest distance L2 is set according to the groove width dimension of the groove portion 2a of the frame member 2.

The cross-sectional shape of the bent portion 1a perpendicular to the longitudinal direction is rectangular as an example. The cross-sectional shape perpendicular to the longitudinal direction of the bent portion 1a is not limited to this, and may be an inverted triangular shape in which the groove width dimension decreases from the open side to the outside of the bent portion 1a to the opposite side, or a U It may be in the shape of a letter.

The agricultural waterproof sheet 1 is configured to be easily bent along each bent portion 1a having a thin thickness. As shown in FIG. 2, the agricultural waterproof sheet 1 is bent at the bent portion 1a in a state where the portion where the bent portion 1a is formed is inserted in the groove portion 2a of the frame member 2, and meanders in a plan view. The spring 3 made of a metal wire formed so as to be pressed against the inner walls of the groove 2a on both sides in the groove width direction and is fixed to the groove 2a.

Here, FIG. 5 is a cross-sectional view of the agricultural water blocking sheet 101 and the frame member 2 when a part of the conventional agricultural water blocking sheet 101 is inserted into the groove portion 2a of the frame member 2. When fixing the agricultural waterproof sheet 101 to the frame member 2, for example, the builder recesses the agricultural waterproof sheet 101 and puts a part of the agricultural waterproof sheet 101 in the groove 2a of the frame member 2. In this state, the spring 3 (see FIG. 3) urged in the groove width direction of the groove portion 2a is inserted into the groove portion 2a, and the agricultural water blocking sheet 101 is pressed against the inner wall of the groove portion 2a in the groove width direction. As a result, the agricultural waterproof sheet 101 is fixed to the frame member 2.

However, the agricultural waterproof sheet 101 is strong and may have a relatively large restoring force. As shown in FIG. 5, in this case, when the agricultural waterproof sheet 101 is bent and tried to be inserted into the groove 2a of the frame member 2, the agricultural waterproof sheet 101 is bent and repelled from the groove 2a of the frame member 2. There is a risk of popping out. Therefore, for example, the builder fixes the agricultural waterproof sheet 101 to the groove 2a of the frame member 2 by the spring 3 while pressing a part of the agricultural waterproof sheet 101 inside the groove 2a of the frame member 2. Is required, and the workability is lowered and the work load is increased. The problem of such a decrease in workability becomes more remarkable, for example, as the restoring force of the agricultural water blocking sheet 101 is higher.

On the other hand, in the agricultural water blocking sheet 1 of the present embodiment, the bent portion 1a is formed, and the thickness dimension of the bent portion 1a is reduced. The restoring force is reduced. Therefore, the portion of the agricultural waterproof sheet 1 in which the bent portion 1a is formed is inserted into the groove portion 2a of the frame member 2, and the agricultural waterproof sheet 1 is bent at the bent portion 1a in the groove portion 2a for agriculture. The waterproof sheet 1 can be bent relatively easily, and it is possible to easily maintain a state in which a part of the agricultural waterproof sheet 1 is placed in the groove 2a of the frame member 2. Therefore, workability when fixing the agricultural waterproof sheet 1 in the groove portion 2a of the frame member 2 by the spring 3 can be improved.

Further, when the conventional agricultural waterproof sheet 101 having strong elasticity is fixed in the groove 2a of the frame member 2 by the spring 3, the agricultural waterproof sheet 101 may cause wrinkles or bending in and around the groove 2a. There is a risk that a gap may be created between the agricultural waterproof sheet 101 and the frame member 2.

On the other hand, the agricultural waterproof sheet 1 of the present embodiment is bent at the bent portion 1a, so that an excessive force is less likely to be applied to the agricultural waterproof sheet 1 and wrinkles and bending are less likely to occur. Further, it is unlikely that a gap is formed between the agricultural waterproof sheet 1 and the frame member 2. Therefore, the agricultural waterproof sheet 1 can be appropriately fixed in the groove 2a of the frame member 2 by the spring 3, and the aesthetic appearance of the agricultural house can be prevented from being deteriorated due to wrinkles or bending of the agricultural waterproof sheet 1. .. In addition, it is possible to prevent the heat retention of the agricultural house from being lowered due to the gap.

The agricultural waterproof sheet 1 is, for example, based on a T-die extrusion molding method, in which a sheet member made of a resin material is continuously manufactured using a T-die, and the sheet member is cooled and molded before the sheet member is cooled and molded. It is manufactured by pressing a rotary engraving blade on the surface of the above surface and processing it so as to form a bent portion 1a. The method for manufacturing the agricultural waterproof sheet 1 is not limited to this.

As described above, since the agricultural waterproof sheet 1 of the present embodiment is easily bent in the thickness direction at the bent portion 1a, it can be easily bent at the bent portion 1a even with a small force. Therefore, for example, when a part of the agricultural waterproof sheet 1 is inserted into the groove 2a of the frame member 2, the portion of the agricultural waterproof sheet 1 in which the bent portion 1a is formed is arranged inside the groove 2a. , A part of the agricultural waterproof sheet 1 can be easily arranged in the groove 2a. As a result, it is possible to prevent the agricultural waterproof sheet 1 from jumping out of the groove 2a due to the repulsion of the bending. Therefore, the agricultural waterproof sheet 1 can be easily fixed to the frame member 2 in the groove portion 2a of the frame member 2.

Further, since the bent portion 1a of the agricultural waterproof sheet 1 is recessed in the thickness direction, the bent portion 1a can be easily bent and the durability can be maintained satisfactorily.

Further, since the bent portion 1a of the agricultural waterproof sheet 1 is formed in a wavy shape in a plan view, the agricultural waterproof sheet 1 is provided in a region corresponding to the amplitude width of the wave in the shape of the bent portion 1a. It can be easily bent. Therefore, even if the groove width of the groove 2a of the frame member 2 for fixing the agricultural water stop sheet 1 and the cross-sectional shape perpendicular to the longitudinal direction of the groove 2a are different, the agricultural water stop sheet 1 can be attached to the frame member 2. It can be easily fixed in the groove 2a.

Further, in the agricultural waterproof sheet 1, since the bent portion 1a is formed in a wavy shape by bending a plurality of line segments in a zigzag pattern in a plan view, the bent portion 1a can be formed in a relatively simple shape. .. In addition, the agricultural water blocking sheet 1 can be easily bent along each line of the bent portion 1a, preventing an excessive force from being applied to the bent agricultural water blocking sheet 1 and causing wrinkles and bending. , It is possible to prevent the above gap from occurring.

Further, in the water blocking sheet 1 for agriculture, two bent portions 1a are arranged so as to be separated from each other in a direction perpendicular to the one direction (with a minimum distance L2) in a plan view. Therefore, for example, when a part of the agricultural waterproof sheet 1 is inserted into the groove 2a of the frame member 2, the agricultural waterproof sheet is set at a position corresponding to both ends in the groove width direction on the bottom side of the groove 2a with the shortest distance L2. 1 can be bent, and the agricultural water blocking sheet 1 can be bent at positions corresponding to both ends in the groove width direction on the opening side of the groove portion 2a. Therefore, it is possible to make it easier to further arrange the agricultural water blocking sheet 1 inside the groove portion 2a following the internal shape of the groove portion 2a.

The number of bent portions 1a included in the agricultural waterproof sheet 1 may be at least one, but if it is two or more, it can be used for agriculture for a plurality of types of frame members 2 having different sizes and forms. It is desirable because the water blocking sheet 1 for agriculture can be easily fixed and the versatility of the water blocking sheet 1 for agriculture can be enhanced. Hereinafter, the second embodiment will be described focusing on the differences from the first embodiment.

(Second Embodiment)
FIG. 6 is a front view of the agricultural water blocking sheet 11 according to the second embodiment. As shown in FIG. 6, in the water blocking sheet 11 for agriculture, the bent portion 11a is formed in a broken line shape in a plan view. The bent portion 11a extends linearly as a whole in one direction (horizontal direction in FIG. 6) along the surface.

The agricultural water stop sheet 11 having the above configuration also has the same effect as the agricultural water stop sheet 1 of the first embodiment. Further, for example, by adjusting at least one of the interval between the line segments adjacent to the longitudinal direction of the broken line and the length dimension of the line segment adjacent to the longitudinal direction of the broken line, the agricultural waterproof sheet 11 can be easily bent. It can be easily adjusted.

The present invention is not limited to each embodiment, and its configuration can be changed, added, or deleted without departing from the spirit of the present invention. The embodiments may be arbitrarily combined with each other, for example, some configurations in one embodiment may be applied to other embodiments. The agricultural waterproof sheet does not have to be buried in the ground 20 at the lower part, and may be used, for example, above a base formed of concrete.

Further, when the bent portion is formed without penetrating the agricultural waterproof sheet, the bent portion may be provided on both sides of the agricultural waterproof sheet. In this case, the bent portions provided on both sides of the agricultural waterproof sheet may be arranged at positions overlapping in the thickness direction of the agricultural waterproof sheet. Further, a bent portion may be formed by denting a part of one surface of the agricultural waterproof sheet and projecting the opposite surface of the recessed portion of the agricultural waterproof sheet. In this case, the thickness dimension of the portion where the bent portion is formed and the portion where the bent portion is not formed may be the same.

As described above, according to the present invention, there is an excellent effect that it is possible to satisfactorily prevent the workability when fixing the agricultural waterproof sheet to the frame member from being lowered. Therefore, it is beneficial to widely apply it as an agricultural waterproof sheet that can exert the significance of this effect.

1,11 Agricultural waterproof sheet 1a, 11a Bent part

Claims (6)

Extending linearly in one direction along the surface, spaced to said one direction and a direction perpendicular in plan view, a part of the surface bent in the thickness direction easily machined machined portion der Ru 2 or more Equipped with a folding part,
Two of the sandwiched bent region and its outer region is integrally and continuously, and, the two regions sandwiched by the folded portion of the can that has been formed flat, agricultural Water stop sheet. The agricultural waterproof sheet according to claim 1, wherein the bent portion is recessed in the thickness direction. It is provided with at least one bent portion which extends linearly in one direction along the surface and is a processed portion in which a part of the surface is easily bent in the thickness direction.
In plan view, the bent portion is formed in a wave shape, waterproofing sheet for agriculture. The agricultural water blocking sheet according to claim 3, wherein the bent portion is formed in a wavy shape by bending a plurality of line segments in a zigzag manner in a plan view. The agricultural water blocking sheet according to any one of claims 1 to 4, wherein the bent portion is formed in a broken line shape in a plan view. Before Kiorikyoku portion, extends linearly, agricultural waterproofing sheet according to any one of claims 1 to 5.

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