JP7004577B2 - Plant curing sheet and plant curing sheet laying device using it - Google Patents

Description

The present invention relates to a plant curing sheet and a plant curing sheet laying device using the same.

There are two types of turf, summer turf and winter turf. Summer turf prefers a hot climate, and in winter when the temperature drops below about 15 ° C, it sleeps, and the leaves turn brown and become dead. In addition, winter turf prefers a cold climate and leaves remain green even in winter, but in summer when the temperature exceeds 30 ° C, summer withering may occur.
Therefore, at the ground where soccer and rugby, which are mainly winter competitions, are held, winter turf is used because athletes and spectators also want to compete on the green grass while the competition is being held. It is being planted.

However, in recent years, soccer and rugby games are often held in the summer, including international competitions such as the Olympic Games and the World Cup, and a ground with a green grass color is desired all year round. ing.
Therefore, the present inventors planted summer turf at the ground where soccer, rugby, etc. are held in order to make the turf leaves green even in summer, and the summer turf leaves are green even in winter. We conducted a study to maintain the condition of. In the ground where summer turf is planted, it is important to keep the leaves of summer turf green by suppressing the decrease in soil temperature in winter.

As a plant curing sheet for measures against frost, snowfall, and cold air on lawns in soccer fields and golf courses, a sheet with a shading rate of 70 to 10%, a draft of 50 to 120 cc / cm ² / sec, and a water flow rate of 300 cc or more is known. Has been done. (Patent Document 1)
However, in such a plant curing sheet, since the aeration amount is small, a large amount of dew condensation may occur and the turf may become sick for a long period of time.
Further, this plant curing sheet is intended to be laid for a long period of time, and the laying workability (workability of laying and tidying up) of the plant curing sheet is not considered.

International Publication No. 01/35723

Therefore, an object of the present invention is to provide a plant curing sheet having heat retention and suppressing the occurrence of dew condensation in a cold environment.
Further, the present invention provides a plant curing sheet that can be easily laid or removed even in a wide range such as a soccer field or a rugby field, and a laying device using the plant curing sheet. The purpose is.

In order to solve the above problems, the plant curing sheet according to the present invention has the following constitution.

(1) A plant curing sheet containing a fiber cloth having an air permeability of 400 cm ³ / cm ² · s or more and a light transmittance of 70% or more by the JIS L1096 A method (Frazil type method).
(2) The above-mentioned (1), wherein the fibrous fabric has a tensile strength of 150 N or more by the JIS L1096 B method (grab method) and a tear strength of 8 N or more by the JIS L1096 D method (Pendulum method). Plant curing sheet.
(3) The plant curing sheet according to (1) or (2) above, wherein the dimensional change rate of the fiber cloth is −2.5% or more and 2.5% or less.
(4) The plant curing sheet according to any one of (1) to (3) above, wherein the fiber cloth has a basis weight of 20 g / m ² or more and 100 g / m ² or less.
(5) The plant curing sheet according to any one of (1) to (4) above, wherein the fiber cloth is a woven fabric.
(6) The plant curing sheet according to (5) above, wherein the fiber cloth is a double woven fabric or a plurality of woven fabrics are laminated and joined.
(7) The plant curing sheet according to any one of (1) to (6) above, wherein the fiber cloth is made of synthetic fibers.
(8) The plant curing sheet according to (7) above, wherein the synthetic fiber is made of a monofilament.
(9) The plant curing sheet according to (7) or (8) above, wherein the synthetic fiber is made of polyester fiber.
(10) The plant curing sheet according to any one of (1) to (9) above, wherein the fiber cloth has a thickness of 0.5 mm or less.
(11) The plant curing sheet according to any one of (1) to (10) above, wherein a plurality of the fiber fabrics are joined and the length of at least one side is 20 m or more.
(12) A tubular body having a connecting means on the outer peripheral surface along the axial direction is connected to the plant curing sheet according to any one of (1) to (11) above via the connecting means. Plant curing sheet laying device.
(13) The plant curing sheet laying device according to (12) above, wherein the tubular body is a bag-shaped object filled with air.

The plant curing sheet of the present invention can deliver sunlight or the like to plants while suppressing a decrease in soil temperature, and also suppresses the occurrence of dew condensation. Therefore, even plants, especially summer turf, have green leaves in winter. Can be maintained and provide a clean ground.
Further, in the preferred embodiment of the present invention, the plant curing sheet does not easily absorb water as well as when it is dried, so that it does not become heavy even when it gets wet, and it is easy to lay (lay it down or put it away). In addition, it is excellent in workability at the time of laying (laying and tidying up) from the viewpoint of being light and moderately hard.
Further, in a preferred embodiment of the present invention, the plant curing sheet is prevented from stretching or shrinking even if it gets wet with water due to rain or watering, or even if it dries, and is excellent in dimensional stability.
Further, by using the plant curing sheet laying device of the present invention, the plant curing sheet can be easily laid and tidied up.

It is a schematic diagram of the plant curing sheet laying apparatus which concerns on this invention using the tubular body composed of a bag-like thing.

Hereinafter, the plant curing sheet according to the embodiment of the present invention will be described.
<Plant Clothes>
The plant curing sheet of the present embodiment contains a fiber cloth having an air permeability of 400 cm ³ / cm ² · s or more and a light transmittance of 70% or more according to the JIS L1096 A method (Frazil type method).

In general, it is necessary to improve the airtightness in order to improve the heat retention. Therefore, when the air permeability is increased in order to suppress the occurrence of dew condensation, the heat retention property is naturally lowered. Therefore, it can be said that the two problems of improving the heat retention and suppressing the occurrence of dew condensation are contradictory problems, and it is generally very difficult to provide a plant curing sheet that simultaneously solves these problems. However, this time, the present inventors have used a fiber fabric having a light transmittance of 70% or more to increase the air permeability in order to suppress the occurrence of dew condensation, even when the air permeability is increased, in a cold environment in winter. Even below, it has been found that sufficient heat retention can be achieved to keep the leaves of plants such as turf green. As a result, according to the plant curing sheet of the present invention, it is possible to deliver sunlight or the like to the plant while suppressing the decrease in soil temperature, and further suppress the occurrence of dew condensation, so that the plant, especially the summer turf, can be used. Even such plants can maintain green leaves in winter and provide a clean ground.

The plant curing sheet of the present embodiment includes a fiber cloth having an air permeability of 400 cm ³ / cm ² · s or more according to the JIS L1096 A method (Frazil type method). The air permeability of the fiber fabric is preferably 500 cm ³ / cm ² · s or more, more preferably 600 cm ³ / cm ² · s or more, and even more preferably 700 cm ³ / cm ² · s or more. The upper limit is preferably 1000 cm ³ / cm ² · s or less from the viewpoint of heat retention and strength.
If it is at least the above lower limit, dew condensation can be suppressed and plants such as turf can be prevented from becoming sick and dying.
In particular, dew condensation occurs especially on grounds that use underheating heat insulation means such as heat pipes that allow hot water to pass through the ground, and plants such as turf may turn brown or die due to an environment that is prone to disease. I am concerned. Even in such a case, it is possible to suppress the occurrence of stuffiness and dew condensation, and to prevent the plant from becoming sick and browning or withering. The relatively high air permeability as described above can be achieved by any method known to those skilled in the art, and is not particularly limited, but for example, the weaving density or knitting density of the fiber fabric is appropriately controlled, particularly. Can be achieved by controlling to a relatively low value.

Further, the plant curing sheet of the present embodiment contains a fiber cloth having a light transmittance of 70% or more. The light transmittance of the fiber fabric is preferably 75% or more, and even more preferably 80% or more. The upper limit is not particularly limited, but is 95% or less, more preferably 90% or less, still more preferably 85% or less from the viewpoint of air permeability and heat retention.
If it is above the above lower limit, it is possible to prevent light such as sunlight from penetrating the curing sheet and hinder photosynthesis of plants, and to raise the soil temperature and prevent the temperature in the ground from becoming too low at night. It is preferable from the viewpoint of. Further, when the light transmittance exceeds the upper limit value, heat dissipation from the ground may increase and the required heat retention property may be reduced. The light transmittance in the above range can be achieved by any method known to those skilled in the art, and is not particularly limited, but for example, the weaving density or the knitting density of the fiber cloth can be appropriately controlled and /. Alternatively, it can be achieved by using a fiber fabric of an appropriate color. More specifically, the relatively high light transmittance as described above controls the weaving density or knitting density of the fiber fabric to a relatively low value and / or does not color the fibers such as natural color and white. This can be achieved by using fabrics. In the present invention, the transmittance is measured by using a spectrophotometer V-650 manufactured by Nippon Kogaku Co., Ltd., mounting an integrating sphere, measuring the transmitted light for each wavelength in 5 nm increments of 400 to 700 nm, and measuring the wavelength 400. The transmittance at ~ 700 nm was determined.

The plant curing sheet of the present embodiment preferably contains a fiber cloth having a tensile strength of 150 N or more according to the JIS L1096 B method (grab method). The tensile strength of the fiber fabric is more preferably 200 N or more, still more preferably 300 N or more. There is no particular upper limit, but it is about 1000N.
It is preferable that the tensile strength of at least one of the vertical direction and the horizontal direction of the fiber cloth is at least the above lower limit value. Preferably, both the vertical direction and the horizontal direction are equal to or higher than the above lower limit value. In the present specification, the "vertical direction" and the "horizontal direction" refer to the long side direction and the short side direction of the fiber cloth or the plant curing sheet, respectively, unless otherwise specified, and the long side and the short side respectively. When the lengths of the sides are the same, there is no particular distinction, and it refers to one of the two sides of the fiber cloth or the plant curing sheet that are substantially orthogonal to each other and the other.
If it is above the above lower limit, it suppresses the tearing of the plant curing sheet even when the plant curing sheet is pulled when laying or cleaning up a large plant curing sheet with a side length of more than 20 m. can do.

The plant curing sheet of the present embodiment preferably contains a fiber cloth having a tear strength of 8 N or more according to the JIS L1096 D method (Pendulum method). The tear strength of the fiber fabric is more preferably 10 N or more, still more preferably 15 N or more, or 20 N or more. There is no particular upper limit, but it is about 100N.
It is preferable that at least one of the vertical direction and the horizontal direction of the fiber cloth has a tear strength equal to or higher than the above lower limit value. Preferably, both the vertical direction and the horizontal direction are equal to or higher than the above lower limit value.
When it is at least the above lower limit value, it is possible to prevent the plant curing sheet from tearing even if the sheet is caught by a foreign substance when laying or cleaning up the plant curing sheet.

For example, when the plant curing sheet of the present invention is used to cure turf in a soccer field or a rugby field, a person walks on the plant curing sheet when laying or removing the plant curing sheet. I sometimes work while doing it. Even in such a case, since the fiber cloth has the high tensile strength and / or the tear strength as described above, it is possible to surely prevent the plant curing sheet containing the fiber cloth from being damaged.

The tensile strength and tear strength in the above range can be achieved by any method known to those skilled in the art, and are not particularly limited, for example, the weaving density or knitting density of the fiber fabric, and the material used for the fiber fabric. , And can be achieved by appropriately controlling or selecting the weaving method or knitting method. For example, when the weaving density or knitting density of the fiber cloth is controlled to a relatively low value in order to improve the air permeability of the plant curing sheet, the tensile strength and the tear strength of the fiber cloth generally tend to be low. be. Therefore, it is generally difficult to achieve both strength and breathability. However, in the present invention, even in such a case, for example, by forming the fiber fabric with a double woven fabric or the like, the air permeability can be satisfied with the requirement of 400 cm ³ / cm ² · s or more. It is possible to control the tensile strength and tear strength of the fiber fabric within a desired range.

The plant curing sheet of the present embodiment preferably contains a fiber cloth having a dimensional change rate of −2.5% or more and 2.5% or less. The dimensional change rate of the fiber fabric is more preferably -2.0% or more, 2.0% or less or -1.5% or more, 1.5% or less, still more preferably -1.0% or more, 1 It is 0.0% or less, most preferably −0.7% or more, and 0.7% or less.
It is preferable that at least one of the vertical direction and the horizontal direction of the fiber cloth has a dimensional change rate in the above range. Preferably, both the vertical direction and the horizontal direction have dimensional stability in the above range.
Within the above range, a plant curing sheet may be laid on the ground, etc., and even if the plant curing sheet becomes wet due to watering or rain, or if it becomes sunny and dry. Since the dimensions of the plant curing sheet are stable, a stable laying state can be maintained.
When the dimensional change rate deviates from the above range, the size of the plant curing sheet changes significantly when it is dried or wet, for example, the plant curing sheet shrinks and a part of the place where plants such as turf are planted on the ground. Is exposed to the outside air, or the plant is exposed to the outside air at the place where the plant curing sheet and the ground are joined, for example, the stud attached to the plant curing sheet comes off from the pigeons, or the plant curing sheet tears. Even in a weak wind, the plant curing sheet may be blown off. In addition, there is a risk of economic loss such as repair or replacement of the plant curing sheet or the plant curing sheet fixing means installed on the ground.

In the present invention, the measurement of the dimensional change rate was carried out according to JIS L1096 dimensional change a) Immersion treatment method A method (normal temperature immersion method). The length is measured assuming that it is wet with rain or water, soaked in water for a specified time, taken out of the water, and immediately measured the length of the measurement section of the sample. Then, the dimensional change rate during drying was obtained by measuring the length of the measurement section of the sample after air-drying on a flat surface without draining or dehydrating. If the absolute value of the dimensional change rate differs between wet and dry, the dimensional change rate with the larger absolute value is taken as the dimensional change rate of the sample. For example, if the dimensional change rate of a sample when wet is −1.0% and the dimensional change rate when dry is 0.5%, the dimensional change rate of this sample is −1.0%. On the other hand, when the absolute values are the same but the signs are different, both values are adopted as the dimensional change rate of the sample.
The dimensional change rate was calculated by the following formula (1) from the length after each treatment after repeating the operations of immersion in water and drying three times with respect to the length before the first treatment.
The dimensional change rate (%) was measured in the vertical direction and the horizontal direction of the plant curing sheet.

Dimensional change rate = (length before the first treatment-length after the treatment) / (length before the first treatment) x 100 ... (1)

Further, the plant curing sheet of the present embodiment preferably contains a fiber cloth having a basis weight of 20 g / m ² or more and 100 g / m ² or less. The basis weight of the fiber fabric is more preferably 90 g / m ² or less, still more preferably 80 g / m ² or less. If it falls below the above upper limit, a light plant curing sheet can be obtained. By using such a light plant curing sheet, it is possible to remarkably improve the workability when laying or cleaning up the sheet. In addition, since the plant curing sheet is light, it becomes easy to form a space between the plant curing sheet and the plant, so that it is excellent in heat retention and suppression of dew condensation. In addition, by using such a light plant curing sheet, it is possible to reduce the pressure applied to the plant when the plant curing sheet is laid, which is very advantageous from the viewpoint of plant growth.
Further, the smaller the lower limit is preferable from the viewpoint of light weight and light transmission, but 30 g / m ² or more is preferable, and 40 g / m ² or more is more preferable from the viewpoint of strength and heat retention.

Further, the plant curing sheet of the present embodiment preferably contains a fiber cloth having a thickness of 0.5 mm or less, more preferably 0.4 mm or less, still more preferably 0.3 mm or less. Is good.
If it is less than the above upper limit, a plant curing sheet having a small volume and a plant curing sheet laying device can be obtained. Especially when a plant curing sheet is used for a large ground, even if there is a slight difference in the thickness of the fiber cloth itself, the difference in volume of the entire plant curing sheet becomes very large, so it is extremely easy to work from the viewpoint of workability. It is valid.
The lower limit of the thickness of the fiber cloth is not particularly limited, but 0.05 mm or more is preferable from the viewpoint that the heat retention and strength may be too small and the air permeability may be too large. More preferably, it is 0.10 mm or more.

Further, the plant curing sheet according to the embodiment of the present invention preferably contains a fiber cloth having a rigidity of 50 mm or more in the JIS L1096 rigidity A method (cantilever method), more preferably 70 mm or more, still more preferably. It is preferable to include a fiber cloth of 80 mm or more. The upper limit is preferably 200 mm or less, preferably 150 mm or less.
It is preferable that at least one of the vertical direction and the horizontal direction of the fiber cloth has the above-mentioned rigidity and softness. It is preferable that both the vertical direction and the horizontal direction have the above-mentioned rigidity and softness.
If the rigidity is equal to or higher than the above lower limit, the slip of the plant curing sheet will be good, the ground cover plants such as turf will not be damaged easily, the clinging due to static electricity will be suppressed, the shape retention will be excellent, and the plant curing sheet will be excellent. Excellent workability when laying and cleaning up. In addition, it forms a space between the plant and the plant curing sheet, and is excellent in heat retention and dew condensation suppression. In particular, it is more preferable that the plant curing sheet uses the monofilament described below and has the above-mentioned rigidity and softness.
Further, if the above upper limit value is exceeded, workability such as winding and folding of the plant curing sheet deteriorates, and there is a possibility that the bulk at the time of storage becomes large and the broken wrinkles of the plant curing sheet become remarkable.

Materials of the fiber fabric useful for this embodiment include synthetic fibers such as polyester, nylon, acrylic, polyurethane, polypropylene and polyvinyl chloride, regenerated fibers such as rayon, bamboo fiber and soybean protein fiber, triacetate and diacetate. It may be a semi-synthetic fiber, a natural fiber such as cotton, linen, silk, hair, etc., and among these, a plurality of kinds of fibers may be mixed fibers, a blended fiber, or the like.

Synthetic fibers are preferable as the material from the viewpoint of dimensional stability when wet or dry in the rain (the absolute value of the dimensional change rate is small), and the synthetic fibers are particularly composed of polyester, polypropylene, and polyvinyl chloride. It is preferable that it contains at least one selected from the group or is at least one selected from the above group. Polyester is preferable from the viewpoint of the strength of the obtained curing sheet. On the other hand, as a measure against dew condensation, a plant curing sheet using polyvinyl alcohol fiber is known, but the one using polyvinyl alcohol fiber has a large dimensional change due to repeated getting wet with water such as rain and drying. It is disadvantageous. In addition, when polyvinyl alcohol fiber is used, not only when it rains or when it is sprinkled, but also when it is affected by night dew, it frequently expands and contracts, which puts a heavy load on the plant curing sheet and the fixing means of the ground. There is a risk that it will take. Further, when polyvinyl alcohol absorbs water, the plant curing sheet becomes heavy, and workability may deteriorate when it is used as a plant curing sheet for laying in a large area. In particular, in applications where it is necessary to lay or clean up the plant curing sheet relatively frequently, deterioration of workability becomes an extremely big problem. On the other hand, according to a preferred embodiment of the present invention, the material of the fiber fabric contains at least one selected from the group consisting of polyester, polypropylene, and polyvinyl chloride, or at least one selected from the above group. By using synthetic fibers as seeds, especially polyester, it is possible to avoid deterioration of workability as in the case of using polyvinyl alcohol, and therefore, work to lay and clean up relatively frequently. It is possible to apply the plant curing sheet of the present invention even in applications requiring the above.

The yarn constituting the fiber fabric may be either monofilament or multifilament, but the obtained plant curing sheet has an appropriate hardness (rigidity and softness) as described above, and the plant curing sheet is laid. Monofilament is preferable from the viewpoint of workability such as cleaning and tidying up. In addition, monofilament is preferable from the viewpoint of not easily damaging ground cover plants such as turf. More specifically, by using a monofilament, the obtained plant curing sheet has an appropriate rigidity and softness, so that the plant curing sheet becomes slippery and has the effect of making it difficult to damage the ground cover plant such as turf. can. As a result, even when the plant curing sheet is removed from the laid state, the leaves such as turf are rarely cut or the cut leaves are hardly caught in the plant curing sheet, so that the ground cover plant such as turf is removed. In addition to the effect of making it hard to damage, there is no need for troublesome work such as removing the leaves sandwiched between the sheets, and the effect that the plant curing sheet can always be used in a clean state can be achieved.
The thickness of the thread is not particularly limited, and a thread having a thickness of about 7 decitex to 500 decitex may be used. From the viewpoint of the strength of the obtained plant curing sheet and the balance of other physical characteristics, the lower limit is preferably 20 decitex or more, more preferably 30 decitex or more. The upper limit is preferably 300 decitex or less, more preferably 100 decitex or less.

Further, the shape of the fiber cloth may be a woven fabric, a knitted fabric, or a non-woven fabric, and is not particularly limited. From the viewpoint of workability when laying or cleaning up the plant curing sheet, textiles are preferable.
Further, from the viewpoint of heat retention and strength, the fiber fabric is preferably a double woven fabric or a stack of a plurality of woven fabrics and / or knitted fabrics, and has workability and storability (does not become bulky) at the time of laying or tidying up. ), It is preferable that it is a double woven fabric or a woven fabric in which a plurality of woven fabrics are joined. Examples of the joining of the woven fabric and / or the knitted fabric include those sewn with a thread and those bonded with an adhesive, but the joining is not particularly limited. However, compared to a fabric in which multiple fabrics and knits are simply layered and partially bonded, a fiber fabric in which multiple fabrics and knits are firmly bonded by double weaving or stitching is used for plant curing. It is possible to easily prevent the sheet from slipping during the sheet laying work and the sheet winding work. Preventing seat slippage is especially important when curing large ground turf such as soccer fields and rugby fields. This is because, for example, when curing turf in a soccer field or a rugby field, a sheet having a length of about several tens of meters to 100 m or more can be used, and a sheet having such a length is laid. If there is a deviation during winding or winding, it may be a deviation of about 4 to 6 m, and if such a deviation occurs, the sheet laying and winding work can be continued. Because it will disappear.
In the present embodiment, when a plurality of fiber cloths are laminated and joined as a plant curing sheet, the one in which the plurality of fiber cloths are stacked and joined is regarded as the fiber cloth in the present invention. Therefore, for example, when two fiber fabrics are stacked and used as a plant curing sheet, the two fiber fabrics are stacked, and the above-mentioned air permeability, light transmittance, tensile strength, tear strength, and the like. The fiber fabric of the present embodiment has performances such as dimensional stability and rigidity and softness.

In addition, these fiber fabrics may be colored in any color such as black, red, yellow, green, and blue, as well as a fluorescent color or a color that is said to be suitable for growing plants. From the viewpoint of increasing the soil temperature and the transmittance of light, it is preferable to use a non-colored woven fabric or a white fiber cloth.
Further, to the extent that the gist of the present invention is not deviated, these fiber fabrics are subjected to antibacterial deodorant processing, deodorant processing, antibacterial processing, infrared absorption processing, ultraviolet absorption processing, insect repellent processing, mite-proof processing, anti-allergen processing, and control. It may be a fiber cloth that has been subjected to electric processing, water absorption processing, moisture absorption processing, water repellent processing, flame retardant processing, etc., and has each performance.
Further, the fiber fabric may be subjected to calendering or the like to flatten the yarn to increase the heat retention or reduce the air permeability.

Further, the plant curing sheet of the present embodiment may have a joining means such as eyelets, hooks, fasteners, hook-and-loop fasteners, buttons, and strings on at least one side of the plant curing sheet. By joining such a joining means to a wedge or a fixing means installed on the ground (male or female counterparty, etc.), the plant curing sheet can be laid and fixed on the ground. It can also be used for joining the tubular body of the plant curing sheet laying device, which will be described later, and the plant curing sheet.
The installation portion of these joining means in the plant curing sheet may be reinforced by folding the fiber cloth multiple times to form a double or triple structure or by using another reinforcing material. As such a reinforcing material, for example, it is preferable to use a transparent film or the like. By using a transparent film as a reinforcing material for the installation part of the joining means, light can be sufficiently transmitted even in such an installation part, so only the leaves of the plant corresponding to the place of the installation part can be transmitted. The leaves do not turn brown in a line, and the leaves of the plant can be surely kept green like other sheet laying sites.
Further, the plant curing sheet may not have a joining means such as eyelets.

Further, the size of the plant curing sheet of the present embodiment is not particularly limited as long as it is an arbitrary size depending on the place where the plant curing sheet is laid. For example, the vertical direction is 10 cm to 1 km, the horizontal direction is 10 cm to 1 km, and the like.
Further, the plant curing sheet may be one in which a plurality of the fiber fabrics are joined, and more specifically, one in which the fiber fabrics are joined in the length direction or the long side direction and / or the width direction or the short side direction. good.
In particular, the plant curing sheet of the present embodiment has a length of at least one side of 20 m or more, more specifically, a length of 20 m or more in the vertical direction and / or a length of 20 m or more in the horizontal direction. Even so, it maintains its strength and is excellent in workability during laying and tidying up. Further, even if the length in the vertical direction is 20 m or more and the length in the horizontal direction is 20 m or more, and even if one side of the plant curing sheet is 50 m or more, the workability is excellent. There is no particular upper limit, but it is about 150m for general soccer fields and rugby fields.
Further, a plurality of plant curing sheets may be stacked little by little to lay the plant curing sheet in a wide laying place.

Further, in order to obtain a large plant curing sheet, a plurality of fiber fabrics may be joined in the length direction or the long side direction and / or the width direction or the short side direction. Such joining of the fiber cloth can be performed by any method such as sewing, adhesive, hook-and-loop fastener, button, etc., but sewing is preferable from the viewpoint of weight reduction and workability of the plant curing sheet.
In addition, when a convex portion is generated in these joints, if the convex portion is laid so as to be a surface in contact with the plant, the air layer between the plant and the plant curing sheet is increased, and the heat retention property is improved. It is preferable from the viewpoint of preventing dew condensation. Generally, when the convex portion is arranged on the surface in contact with the plant, the plant may be pushed by the convex portion to form a concave portion. However, since the plant curing sheet of the present embodiment is light, such a risk is reduced. The above effect can be obtained.

By using the above-mentioned plant curing sheet, it has heat retention, is excellent in light transmission, suppresses dew condensation between the plant and the plant curing sheet, and is excellent in plant growth. Therefore, in the ground covered with summer grass, the state of the ground having green leaves can be maintained even during the winter season.
Further, the plant curing sheet according to the preferred embodiment of the present invention is light and does not easily absorb water, so that it does not become heavy even if it is wet, and it is easy to lay (lay it down or put it away). In addition, it suppresses shrinkage even when it gets wet or dries with water such as rain, and has excellent dimensional stability. In addition, it is moderately hard and easy to lay (lay and clean up).

<Plant curing sheet laying device>
The plant curing sheet laying device of the present embodiment will be described below.
The plant curing sheet laying device of the present embodiment is formed by connecting a tubular body having connecting means on the outer peripheral surface along the axial direction and the plant curing sheet via the connecting means. Some of the items explained above regarding the plant curing sheet have been omitted.

The tubular body of the plant curing sheet laying device of the present embodiment is a bag-shaped object, which becomes a tubular body by filling the bag-shaped object with air, a styrofoam tubular body, or a resin-made tubular body. Any material such as a tubular body, a wooden tubular body, and a metal tubular body can be used. The inside of the tubular body may be hollow or solid.
From the viewpoint of being lightweight and excellent in workability, a bag-shaped material that becomes a tubular body by filling the bag-shaped material with air or a tubular body made of styrofoam is preferable.
In addition, a bag-shaped object that becomes a cylinder when inflated by injecting air becomes compact and easy to store when the air is removed, except during laying work and winding work when cleaning up. preferable.

The tubular body has connecting means on the outer peripheral surface along the axial direction of the tubular body, and is connected to at least one side of the plant curing sheet via the connecting means.
As the connecting means, any connecting means such as eyelets, hooks, fasteners, hook-and-loop fasteners, buttons, strings, and adhesives (including double-sided tape) may be used to connect the tubular body and the plant curing sheet.

The size of the tubular body may be any size depending on the size of the place where the plant curing sheet is laid, and is not particularly limited.
For example, the axial length of the tubular body may be about 10 cm to 100 m, and the thickness or diameter of the tubular body may be about 1 cm to 2 m.
If it is a tubular body used for a plant curing sheet laying device for a soccer field or a rugby field, it is preferable to use a tubular body having a length of 5 to 150 m and a diameter of about 30 cm to 1.5 m.

Further, the length of the side to be joined to the tubular body of the plant curing sheet to be joined to the tubular body is substantially the same as the length of the tubular body, or a little shorter is better from the viewpoint of workability. Further, the length of the side of the plant curing sheet having a positional relationship perpendicular to the axial direction of the tubular body is not particularly limited, but is about 50 cm to 1 km.
If it is a plant curing sheet used for a plant curing sheet laying device for a soccer field or a rugby field, the width (the side of the plant curing sheet connected to the tubular body) is 5 to 150 m, and the length (the axial direction of the tubular body). The side of the plant curing sheet that has a vertical positional relationship) should be about 10 to 200 m.

FIG. 1 is a schematic view of a plant curing sheet laying device according to the present invention using a tubular body composed of a bag-shaped material. Here, FIG. 1A shows a bag-shaped object 1 constituting a tubular body in a plant curing sheet laying device. The bag-shaped object 1 is provided with at least one air filling port 2 for filling air, and a connecting means 3, for example, a hook-and-loop fastener (male) is attached to the surface thereof along the axial direction. In FIG. 1A, the air filling port 2 is provided at the corresponding portion of the bag-shaped object 1 constituting one end of the tubular body. However, the air filling port 2 is not limited to such a place, and can be provided at any suitable one or a plurality of places of the bag-shaped object 1. Next, the bag-shaped object 1 is made into the form of a tubular body 4 by filling air from the air filling port 2 (FIG. 1 (b)). Finally, the connecting means 3 of the tubular body 4 and the joining means 6 (for example, a hook-and-loop fastener (female)) provided on at least one side of the plant curing sheet 5 are connected, and then the tubular body 4 is rolled. Then, the plant curing sheet 5 is wound around the tubular body 4 to obtain the plant curing sheet laying device 10 (FIG. 1 (c)).

The method of laying the plant curing sheet using the plant curing sheet laying device of the present embodiment is, for example, in the case of a soccer field, the axial direction of the tubular body of the plant curing sheet is parallel to the touch line or goal line. By placing the plant curing sheet laying device slightly in front of the place where you want to lay the plant curing sheet, and rolling the tubular body in the direction you want to lay the plant curing sheet (towards the ground). , The plant curing sheet can be easily laid.
If the entire area where you want to lay the plant curing sheet cannot be laid with one plant curing sheet, make it slightly overlap with the already laid plant curing sheet, then lay the plant curing sheet, and repeat this. A plant curing sheet may be laid over the entire target area.
In addition, when a plurality of plant curing sheets and plant curing sheets are laid side by side, joining means such as strings, hooks, buttons, and surface fasteners are provided near the adjacent plant curing sheets and the plant curing sheets in parallel. It may be provided and adjacent plant curing sheets may be joined to each other.

The end of the plant curing sheet laid on the ground (the side attached to the tubular body and the side facing it) is a joining means provided at the end, for example, in the case of an eyelet, a wedge is driven into the eyelet to form a ground. It is preferable to join and fix it, or to connect and fix the joining means provided at the end of the plant curing sheet and the fixing means installed on the ground.
In addition, when one or more plant curing sheets are laid, at least the outer periphery of the plant curing sheet constituting the outermost side of the laying place is connected to the joining means such as pigeons provided on the plant curing sheet and rust and the like. It is preferable to fix the ground to be used, or to connect the joining means provided on the plant curing sheet and the fixing means installed on the ground.
Therefore, in this case, it is preferable that the side located on the outermost circumference of the plant curing sheet constituting the outermost side of the laying portion has a joining means as well as the end portion.

Further, even when it is desired to adjust the position of the plant curing sheet such as when the plant curing sheet is displaced during the above laying work or when the plant curing sheet and the fixture of the ground are connected, the plant curing of the present embodiment is performed. Since the sheet has an appropriate degree of rigidity and softness, it can be easily moved by sliding on a turf or a plant curing sheet by pulling it by hand, and it can withstand the tension even when it is pulled. Excellent workability due to its strength.
By using the plant curing sheet laying device of the present embodiment as described above, the laying work of laying or cleaning up the plant curing sheet of the present embodiment can be easily performed. Therefore, since the laying work of laying and cleaning up the above-mentioned plant curing sheet is easy, it is easy to take detailed measures, and the plant provides an environment such as making the summer turf have green leaves even in winter. be able to.

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following examples.
The various physical properties in the present invention were measured by the following methods. For the measurement of various physical property values in the present invention, when a fiber cloth obtained by joining a plurality of fiber cloths is used as the fiber cloth of the present invention, the joint portion between the fiber cloth and the fiber cloth is avoided for the measurement of various physical property values. The sample is sampled in this way and a sample without a joint (a fiber cloth and a fiber cloth stacked without joining) is used, and if the joint cannot be avoided, a sample containing the joint is used. Measure each physical property value. The dimensional change rate of the fiber cloth in which a plurality of fiber cloths are stacked is also sampled by the above method. For example, when the dimensional change rate is different in each of the stacked fiber cloths, the dimensional change rate The dimensional change rate of the fiber fabric having the larger value (absolute value) of is adopted. (If the sampled sample has a joint, the value measured with the bonded sample is the dimensional change rate.)
(1) Air permeability The test was carried out according to the JIS L1096 A method (Frazil type method).
(2) Light transmittance For the measurement of the transmittance, a spectrophotometer V-650 manufactured by Nippon Kogaku Co., Ltd. is used, and an integrating sphere is attached, and the transmitted light for each wavelength is measured at a measurement wavelength of 400 to 700 nm in 5 nm increments. , The transmittance at a wavelength of 400 to 700 nm was determined.
(3) Tensile strength The test was conducted according to JIS L1096 Tensile strength B method (grab method).
(4) Tear strength The test was conducted according to JIS L1096 Tear strength D method (Pendulum method).

(5) Dimensional change rate The dimensional change rate was measured according to JIS L1096 Dimensional change a) Immersion treatment method A method (normal temperature immersion method). The length is measured assuming that it is wet with rain or water, soaked in water for a specified time, taken out of the water, and immediately measured the length of the measurement section of the sample. Then, the dimensional change rate during drying was obtained by measuring the length of the measurement section of the sample after air-drying on a flat surface without draining or dehydrating.
The dimensional change rate was calculated by the following formula (1) from the length after each treatment after repeating the operations of immersion in water and drying three times with respect to the length before the first treatment.
The dimensional change rate (%) was measured in the vertical direction and the horizontal direction of the plant curing sheet.

Dimensional change rate = (length before the first treatment-length after the treatment) / (length before the first treatment) x 100 ... (1)

(6) Metsuke The sample was cut into 100 cm ² , the weight was measured using an electronic balance, and the unit was converted to 1 m ² .
(7) Thickness The thickness was measured using PEACOK (product name) MODEL H manufactured by Ozaki Seisakusho Co., Ltd.
(8) Observation of the underground temperature and condition when laid on the lawn A thermometer (thermocouple) was installed at a depth of 5 cm from the ground surface at the place (lawn) where the existing summer turf was laid. Next, lay a 1.5m x 1.5m plant curing sheet on the lawn so that the temperature measurement position is almost in the center, and four sides so that the plant curing sheet is not blown by the wind. For each, four places were fixed to the ground using wedges. Then, the temperature was measured and visually observed from October to March.

(Example 1)
A double woven fabric having a width of 1.46 m obtained by using a polyester monofilament having a thickness of 56 decitex was used as a fiber cloth. This double woven fabric is joined in one direction at the time of weaving at intervals of 4.5 cm. Various measured values of the fiber fabric are shown in Table 1.

Next, 65 pieces of the fiber cloth cut into a width of 1.46 m and a length of 24 m were prepared. This fiber cloth was joined by sewing along the length direction using a sewing machine to obtain a fiber cloth having a width of 24 m and a length of about 90 m.
Next, a hook-and-loop fastener (female) was attached to the end of one side having a length of 24 m. Eyelets were attached to the other three sides at intervals of 5 m to obtain a plant curing sheet having a vertical direction of about 90 m and a horizontal direction of 24 m.

Next, as a tubular body, a bag-shaped object having a hook-and-loop fastener (male) attached along the axial direction, which becomes a tubular body by filling the bag-shaped object with air, is prepared. Then, air was filled using a pump.
Next, the surface fastener (male) of the tubular body and the surface fastener (female) of the plant curing sheet are brought into contact with each other to connect the tubular body and the plant curing sheet, and then the plant curing sheet is wrapped around the tubular body to form the plant curing sheet. Obtained a laying device. After wrapping the plant curing sheet, the air filled in the tubular body was evacuated, and the cylinder was folded and stored. The plant curing sheet laying device has become compact and requires less storage space. The bag-shaped object may be filled with air and stored in a tubular state.

Next, the plant curing sheet was laid on the soccer field where the turf was planted using the plant curing sheet laying device of this embodiment.
First, a plant curing sheet laying device is placed about 3 m outside the touch line of the soccer field so that the axial direction of the tubular body is almost parallel to the touch line, and the plant curing sheet is placed at the end of the length of 24 m. A wedge was used for the attached eyelet and fixed to the ground.

Next, after filling the bag-shaped object with air using a pump to obtain a tubular body, three people line up along the axial direction of the tubular body and face the touch line. While rolling the tubular body, a plant curing sheet was laid at a place having a width of 24 m and a length of about 90 m. After filling the bag with air, the work of rolling and laying the tubular body was completed in a few minutes.
The three people rolled the tubular body while walking on the plant curing sheet, but the plant curing sheet was not torn.
Further, after laying 90 m, the air is removed from the tubular body to fix the end of one side of 24 m of the plant curing sheet connected to the tubular body, and the air-deflated bag-shaped material is used as a weight. You may use it, or you can remove the plant curing sheet from the bag-shaped object and join it to the fixing means provided on the ground using the joining means provided on the side (end) where the tubular body of the plant curing sheet was joined. , The plant curing sheet may be fixed to the ground.

In addition, using the same plant curing sheet laying device, overlap the plant curing sheet laid earlier by about 100 cm, and repeat the same method to spread 5 plant curing sheets over the entire ground where the summer turf is planted. .. The area covered with the plant curing sheet was about 110m x about 90m.

In addition, when laying, the plant curing sheet hardly contained large wrinkles, and the plant curing sheets did not stick to each other. In addition, when you want to adjust the position, by pulling the plant curing sheet by hand, the plant curing sheet can slide and move on the lawn or the plant curing sheet stacked on the lawn, improving workability. It was excellent. At that time, the plant curing sheet was not torn and had sufficient strength.
In addition, conventionally, it took three people for half a day to lay a curing sheet on the entire surface of the soccer field, but in this embodiment, the curing sheet is laid on the entire surface of the soccer field from the place where the bag-shaped object is filled with air. It took 1 to 2 hours for 3 people to complete the work. Also, when removing the laid plant curing sheet, air is put into a bag-shaped object to make it into a tubular body, and the plant curing sheet is wound up by rolling the tubular body, and it takes 1 to 2 hours for 3 people to complete the entire soccer field. I was able to carry out the removal work. Therefore, the work such as laying is easy and can be done in a short time, and the burden on the worker can be reduced even in the place where frequent laying work is required.

(Comparative test)
Using the following four types of plant curing sheets, the underground temperature and condition when laid on the lawn were observed. The results are shown in Table 1.

Plant curing sheet 1: The plant curing sheet of Example 1 is cut into a length of 1.5 m and a width of 1.5 m.

Plant curing sheet 2: A woven fabric (gauze) with a vertical density of 50 / 2.54 cm, a horizontal density of 50 / 2.54 cm, and a basis weight of 21 g / m ² obtained using a polyester monofilament with a thickness of 56 decitex. Two sheets are stacked and sewn along two sides of a set facing each other (at intervals of 140 cm) with a vertical and horizontal size of 1.5 m and 1.5 m.

Plant curing sheet 3: Vertical density 50 / 2.54 cm, horizontal density 50 / 2.54 cm, woven fabric (gauze) and thick with a grain of 21 g / m ² obtained using polyester monofilament with a thickness of 56 decitex. A set of woven fabrics (organdy) with a vertical density of 101 lines / 2.54 cm, a horizontal density of 95 lines / 2.54 cm, and a grain size of 21 g / m ² obtained using a 22-decitex polyester monofilament. Along the two sides (140 cm intervals), the size is 1.5 m long and 1.5 m wide sewn with a sewing machine.

Plant curing sheet 4 (comparative example)
Dio Betalon (trade name) DT650 (slit thread made of polyvinyl alcohol. Reinforcing thread is included at intervals of about 3 cm in the vertical and horizontal directions) manufactured by Dio Chemicals, Ltd. Interval) 1.5m long and 1.5m wide sewn with a sewing machine.

(Observation of underground temperature and condition when laid on lawn)
(Example: Plant curing sheet 1)
Although the temperature varies depending on the weather, the underground temperature is about 5 ° C higher than the outside air temperature, and is about 2 to 4 ° C higher than the underground temperature without laying the sheet. Was equivalent to.
The lawn remained green compared to the place where the plant curing sheet was not laid.
There was a lot of space between the lawn and the plant curing sheet, probably because the plant curing sheet had moderate hardness and was light. In addition, there was no change in the state of maintaining the space even when it became moist due to rain or watering.
In the early morning, water droplets (night dew) adhered to the outer surface of the plant curing sheet, but no water droplets were found on the surface facing the lawn, and the plant curing sheet itself was not sticky. ..
In addition, in the case where the plant curing sheet was laid for a long period of time, in the early spring when the leaves were thick, there were some places where the tip of the turf leaves was slightly protruding from between the threads of the plant curing sheet. When removing the plant curing sheet, there were not many places where the leaves of the turf were cut or the leaves were caught in the sheet. In addition, growth was observed on the leaves and stems of summer turf despite the winter season when growth stopped.

(Example: Plant curing sheet 2)
Although the temperature varies depending on the weather, the underground temperature is about 5 ° C higher than the outside air temperature, and is about 2 to 4 ° C higher than the underground temperature without laying the sheet. Was equivalent to.
The lawn remained green compared to the place where the plant curing sheet was not laid.
There was a lot of space between the lawn and the plant curing sheet, probably because the plant curing sheet had moderate hardness and was light. In addition, even when the plant was wet due to rain or watering, there were some irregularities on the plant curing sheet, but there was almost no change in the state of maintaining the space.
In the early morning, water droplets (night dew) adhered to the outer surface of the plant curing sheet, but no water droplets were found on the surface facing the lawn, and the plant curing sheet itself was not sticky. ..
In addition, in the case where the plant curing sheet was laid for a long period of time, in the early spring when the leaves were thick, there were some places where the tip of the turf leaves was slightly protruding from between the threads of the plant curing sheet. When removing the plant curing sheet, there were not many places where the leaves of the turf were cut or the leaves were caught in the sheet.

(Example: Plant curing sheet 3)
Although the temperature varies depending on the weather, the underground temperature is about 5 ° C higher than the outside air temperature, and is about 2 to 4 ° C higher than the underground temperature without laying the sheet. Was equivalent to.
The lawn remained green compared to the place where the plant curing sheet was not laid.
There was a lot of space between the lawn and the plant curing sheet, probably because the plant curing sheet had moderate hardness and was light. In addition, even when the plant was wet due to rain or watering, there were some irregularities on the plant curing sheet, but there was almost no change in the state of maintaining the space.
In the early morning, water droplets (night dew) adhered to the outer surface of the plant curing sheet, but no water droplets were found on the surface facing the lawn, and the plant curing sheet itself was not sticky. ..
In addition, in the case where the plant curing sheet was laid for a long period of time, in the early spring when the leaves were thick, there were some places where the tip of the turf leaves was slightly protruding from between the threads of the plant curing sheet. When removing the plant curing sheet, there were not many places where the leaves of the turf were cut or the leaves were caught in the sheet.

(Comparative example: Plant curing sheet 4)
The underground temperature of this comparative example was the same as that of each example.
The lawn remained green compared to the place where the plant curing sheet was not laid.
When the drop Cloth was dry, there was a space between the lawn and the drop Cloth, but when it became wet due to rain or watering, the drop Cloth became heavy and soft, and the drop Cloth became slack. The above-mentioned space was reduced in the place where it had become.
In addition, in the early morning and on rainy days, the plant curing sheet absorbs water (night dew), but it seems that the amount of water that can be absorbed is exceeded, and stickiness occurs on both sides of the plant curing sheet. Therefore, there is concern about the outbreak of diseases on the lawn.
In addition, the plant curing sheet was shrunk, tension was applied to the wedge portion for fixing, and there was a place where the plant curing sheet was about to tear.
In addition, in the case where the plant curing sheet is laid for a long period of time, the leaves of the turf come out from between the threads of the plant curing sheet in the early spring when the leaves grow thick, and the plant curing When the sheet was removed, the leaves of these turf were cut off, the ground did not look good, and the plant curing sheet was also soiled with the leaves pinched.

As shown in the results of the above examples, the plant curing sheet of the present invention has excellent heat retention and light transmission, and can keep the turf leaves green even in the summer turf even in the winter. In addition, it is possible to prevent the turf from becoming sick because dew condensation is unlikely to occur. In addition, it has excellent dimensional stability, and can prevent the plant curing sheet from tearing, the fixture from coming off, shrinking, and the plant from being exposed even when it is wet due to rain or watering, or when it is dried.
Further, the plant curing sheet of the present invention is light, moderately hard, and strong, so that it is excellent in workability at the time of laying, and because it is thin, it is also excellent in storage.
On the other hand, in the plant curing sheet 4 of the comparative example, since the light transmittance is 70% or more, the heat retention is maintained, but the air permeability is less than 400 cm ³ / cm ² · s, so that both sides of the sheet are both sides. It can be seen that stickiness has occurred and the occurrence of dew condensation has not been suppressed. Further, the sheet is shrunk due to the use of polyvinyl alcohol as the material of the fiber cloth, and the dimensional stability of the sheet is very poor.

1 Bag-shaped object 2 Air filling port 3 Connecting means 4 Cylindrical body 5 Plant curing sheet 6 Joining means 10 Plant curing sheet laying device

Claims (13)

Plant curing including fiber cloth having air permeability of 400 cm ³ / cm ² · s or more and 1000 cm ³ / cm ² · s or less and light transmittance of 70% or more and 95% or less by JIS L1096 A method (Frazil type method). Sheet. The plant curing sheet according to claim 1, wherein the fibrous fabric has a tensile strength of 150 N or more in the JIS L1096 B method (grab method) and a tear strength of 8 N or more in the JIS L1096 D method (Pendulum method). .. The plant curing sheet according to claim 1 or 2, wherein the dimensional change rate of the fiber cloth is −2.5% or more and 2.5% or less. The plant curing sheet according to any one of claims 1 to 3, wherein the fiber cloth has a basis weight of 20 g / m ² or more and 100 g / m ² or less. The plant curing sheet according to any one of claims 1 to 4, wherein the fiber cloth is a woven fabric. The plant curing sheet according to claim 5, wherein the fiber cloth is a double woven fabric or a plurality of woven fabrics are laminated and joined. The plant curing sheet according to any one of claims 1 to 6, wherein the fiber cloth is made of synthetic fibers. The plant curing sheet according to claim 7, wherein the synthetic fiber is made of a monofilament. The plant curing sheet according to claim 7 or 8, wherein the synthetic fiber is made of polyester fiber. The plant curing sheet according to any one of claims 1 to 9, wherein the fiber cloth has a thickness of 0.5 mm or less. The plant curing sheet according to any one of claims 1 to 10, wherein a plurality of the fiber fabrics are joined and the length of at least one side is 20 m or more. A plant curing sheet laying device formed by connecting a tubular body having connecting means on an outer peripheral surface along the axial direction and the plant curing sheet according to any one of claims 1 to 11 via the connecting means. .. The plant curing sheet laying device according to claim 12, wherein the tubular body is a bag-shaped object filled with air.

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