JP2015198575A - Protective cover body for growing plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective cover body for a growing plant which realizes a light shielding structure while securing sunlight transmissivity and can prevent infiltration of a large amount of rainwater or frost and entry of insect pests or the like.SOLUTION: A protective cover body 11 for a growing plant is produced by: heating and melting a thermoplastic resin ingredient 11; mixing it with a blowing agent to generate a large number of large and small bubbles in the molten resin ingredient; shaping the bubble-containing resin ingredient into a tubular film F so as to contain bubbles in a peripheral wall of the tubular film F; then bursting, by bubble bursting means, the bubbles in the peripheral wall of the tubular film F until the tubular film F is wound into a flat shape, so as to randomly open a large number of vent holes B with different sizes and shapes in the entire peripheral wall of the tubular film F; and cutting and shaping the tubular film D having the large number of holes into a prescribed shape capable of covering the whole growing plant E.

Description

  The present invention relates to a protective cover body for growing plants for protecting growing plants such as potted plants, potted plants, outdoor planted plants and the like from frost and rainwater.

  Conventionally, for example, when growing potted plants in the garden, etc., during cold seasons or when there is a lot of rainwater, the potted plants are moved to indoors or places that are not directly exposed to the outside air to avoid frost damage and rain damage. To protect the growing plants.

  In order to avoid such complications, a covering cover made of a transparent material that allows sunlight to pass through is sometimes covered with a growing plant and is always left outdoors.

  The covering cover is placed in the bowl as a predetermined bottomed bag shape, and the upper bag opening part can be closed by releasing the predetermined hand, or the entire bottom part of the bowl as a substantially sealed bag Or the bottom bottom opening is fixed and closed, or the surface of the protective cover made of synthetic resin is perforated into a porous structure to maintain air permeability, and rainwater does not directly hit the growing plant Thus, various cover bodies have been considered, such as a structure in which the sunlight is sufficiently obtained by utilizing the transparency of the thick resin material so as not to interfere with the photosynthesis of plants.

JP 2001-172948 A

  However, the conventional plant protective cover body is almost always made of synthetic resin, and although it can ensure sunlight permeability, it does not provide a sufficient light shielding structure. There is a risk that the material will deteriorate due to outdoor use during the period and the light shielding mechanism will deteriorate, causing problems in photosynthesis.Although it can ensure air permeability from the perforated vents, rainwater can flow from the vents of a certain size. There is a risk that roots of the growing plants may be caused by invading in large quantities, and there have been inconveniences such as frost damage caused by large amounts of cold air entering the frost and snow parts from the air holes of a certain size.

  In addition, insecticides have been used to protect the growing plants in the flower pots from pest damage.

  The present invention has been made to solve the above-described problems, and has a light-shielding structure while ensuring sunlight permeability, prevents the invasion of a large amount of rainwater and frost, and prevents the invasion of pests and the like. It aims at providing the protective cover body of a plant.

  According to the first aspect of the present invention, a thermoplastic resin raw material is heated and melted, a foaming agent is mixed therein, and a large number of large and small bubbles are generated in the molten resin raw material. After the cylindrical film is gelled from the semi-cured state until the cylindrical film is made into a state in which bubbles are contained in the peripheral wall of the cylindrical film and then wound into a flat shape, the peripheral wall of the cylindrical film Bubbles inside can be ruptured by bubble bursting means, and a large number of vents of different sizes and shapes can be formed in irregular order on the entire peripheral wall of the tubular film, and the entire plant can be covered with such a tubular film with many holes. A protective cover body for growing plants, which is formed by cutting and forming into a predetermined shape.

  According to a second aspect of the present invention, in the first aspect of the present invention, the bubble bursting means includes a disk having a plurality of steps stacked at a constant interval, and a disk tip formed at an acute angle by an inclined surface with its outer peripheral edge directed downward. It is characterized by comprising an air reservoir space having a substantially triangular cross section formed between an edge, a cylindrical film inner peripheral surface along the edge, and an air supply path for supplying air between the stacked disks.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, after a large number of air holes are formed in the entire peripheral wall of the tubular film, the tubular film is moved to the left and right elastic guides. It is characterized in that it is folded into a flat shape while being guided along the outside of the line, and then cut into a predetermined shape.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the cover body is formed in a bag shape having a lower opening or an upper opening. To do.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the cover body is changed from a cylindrical shape to a long sheet having a constant width and wound. The upper surface of the raised portion of the vine in the field is shaped so as to be covered along the longitudinal direction of the vine while unraveling.

  According to the first aspect of the present invention, the thermoplastic resin raw material is heated and melted, and a foaming agent is mixed therein to generate a large number of large and small bubbles in the molten resin raw material. After the tubular film is gelled from the semi-cured state until the tubular film is wound into a flat shape after being molded into a film and containing air bubbles in the peripheral wall of the tubular film Air bubbles in the peripheral wall of the tube are ruptured by bubble bursting means to form a large number of vent holes of different sizes and shapes on the entire peripheral wall of the tubular film in irregular order. By cutting and forming into a predetermined shape that can be covered, bubbles that gelled after the bubbles have expanded into various shapes in a semi-cured resin film, and the cover body has numerous fine ventilation holes Is at random In addition, since all of the vent holes are not formed in the same size and shape, when the whole growing plant is covered as a bag shape, the inside of the bag body is also ventilated in various distribution forms. It has the effect of being able to apply a small amount of outside air uniformly to growing plants.

  Furthermore, since the cover sheet is a thin film, the fine vents can be deformed arbitrarily as the cover sheet contracts by pulling in the front, rear, left and right directions when covering the growing plant. In addition, since the size of the hole also changes, there is an effect that the form of the vent hole can be changed according to the environment of the growing plant so that the optimum cover body sheet form can be achieved and the optimum vent function can be achieved. .

  For example, by applying a tension along the longitudinal direction of the sheet at the time of manufacture to the hole formed in an elliptical shape along the sheet pulling direction at the time of manufacture, the width of the air hole becomes narrow, and accordingly the air hole On the other hand, by pulling in the width direction of the sheet at the time of manufacture, the width of the vent hole becomes wide and the opening area becomes large. As described above, there is an effect that the opening area of the ventilation hole can be adjusted so that the ventilation function of the cover body can be formed in a form most suitable for the environment of the growing plant.

  Furthermore, the amount of received sunlight can be adjusted by using such an adjustable vent shape. For example, an optimal photosynthetic function that affects sunlight plants by changing the color of the cover body. At the same time, the solar light function adjustment by the color of the cover body is effective, and the effect of receiving the true sunlight from the air vent can be maximized.

  In addition, the folds at the edge of the hole at the time of bubble breakage are formed along the ellipse on both sides of the oblong hole, so that the longitudinal surface of the film easily slides and the lateral surface generates slip resistance. There is an effect that the usability can be remarkably improved.

  In addition, dripping rainwater, etc., on the growing plant also causes folds of rain at the edge of the hole, and it does not flow directly into the interior from the fine vents, but it has the same effect as spraying on the growing plant in the form of a mist. It also has the effect that can occur.

  According to the invention described in claim 2, by using a bag-like cover body having an upper opening, the flower pot can be covered in a bag shape and can be carried in this bag shape, It can function as a protective cover body that can be protected from frost, rainwater, and the like.

  Moreover, by setting it as the bag-shaped cover body which has a downward opening part, it can be made to function as a protective cover body which covers and protects the growth plant on a horizontally long planter from upper direction.

  According to invention of Claim 3, the said cover body is made into the shape which can coat | cover the uplifted part upper surface of a vine of a field along the longitudinal direction of a cocoon, unwinding as a long shape of fixed width, and unwinding. Therefore, it can be covered with a cover body along the shape of the upper surface of the raised portion of the ridge of the field, and it has the effect of protecting plants grown on the ridge from frost damage and rainwater.

  And it can be made to function as a protective cover body rich in elasticity by comprising a cover body with a cylindrical film.

It is explanatory drawing which showed the whole structure of the protective cover body of a growth plant. It is explanatory drawing which showed the whole structure of the multi film. It is a figure explaining the state by which the some elliptical long ventilation hole is opened in the cylindrical film in the Example of this invention. It is a figure which shows the cover body manufacturing apparatus used for manufacture of the protective cover body of this invention. FIG. 5 is a partially enlarged explanatory view of FIG. 4. FIG. 6 is a partially enlarged explanatory view of FIG. 5. It is a figure explaining the function of the some elliptical ventilation hole established in the cylindrical film in the Example of this invention. It is a figure explaining the structure by which the some elliptical long ventilation hole is opened in the cylindrical film in the Example of this invention. It is explanatory drawing which showed the whole structure of the protective cover body for flowerpots. It is explanatory drawing which showed the whole structure of the protective cover body for planters.

  In the present invention, a thermoplastic resin material heated and melted containing a large number of large and small bubbles is formed into a tubular film so that bubbles are contained in the peripheral wall of the tubular film, and then the tubular film is flattened. Until the coil is wound, after the cylindrical film is gelled from the semi-cured state, bubbles in the peripheral wall of the cylindrical film are ruptured by the bubble bursting means, and a large number of different sizes and shapes are passed through the entire peripheral wall of the cylindrical film. The present invention relates to a protective cover body for growing plants, characterized in that the pores are formed in irregular order, and a plurality of cylindrical films with holes are cut and formed into a predetermined shape capable of covering the whole growing plant.

  The protective cover body for growing plants according to the present embodiment can be suitably used to protect growing plants such as potted plants, potted plants, outdoor planted plants and the like from frost and rainwater.

  Here, the thermoplastic resin raw material used as the raw material of the protective cover body of the growth plant which concerns on this embodiment is not specifically limited. As an example, polystyrene, polypropylene, high-density polyethylene and the like can be mentioned, but other thermoplastic resins may be used.

  The bubbles in the thermoplastic resin heated and melted may be mixed by aeration or the like, but those generated by adding a foaming agent are desirable. By generating bubbles by adding a foaming agent, while generating bubbles of various sizes, there is a low risk that bubbles having a diameter that greatly deviates from the diameter of most bubbles are generated, Product quality is stabilized.

  The foaming agent is desirably a foaming agent that starts foaming by the heat applied during the melting of the thermoplastic resin, more specifically, in the thermoplastic resin that has been heated to a molten state.

  The amount of foaming agent added to the thermoplastic resin is such that the volume ratio of the bubbles in the molten thermoplastic resin containing bubbles (hereinafter also referred to as bubble-containing resin) is approximately 30 to 60%. The amount is desirable. If the volume ratio of the bubbles in the bubble-containing resin is more than 60%, the formation of air holes is excessive, which is not preferable. Moreover, if the volume ratio of the bubbles in the bubble-containing resin is less than 30%, it is not preferable because sufficient air holes cannot be formed. By adding a foaming agent having a bubble ratio in the above-described range, a better protective cover body for growing plants can be obtained.

  And the protective cover body of the growing plant which concerns on this embodiment can obtain such a bubble containing resin through the below-mentioned extrusion molding means, bubble bursting means, flat means, winding means, etc., for example.

  The protective cover body of the growing plant thus obtained has numerous ventilation holes formed in a resin film, and supplies ventilation, moisture, light, etc. necessary for the growth of the plant housed in the protective cover body. can do.

  In addition, as a point to be particularly noted, the vent hole formed in the protective cover body of the growing plant according to the present embodiment has a substantially elliptical shape having a long diameter along the tension applying direction (tensile direction) by the winding means described above. It has become.

  And, by changing the way of viewing by the infinite number of elliptical vents in which the major axis direction is aligned, the film itself has a directional resin structure.

  Therefore, the film constituting the protective cover body for a growing plant according to the present embodiment does not extend so much in a predetermined direction (tension applying direction / long-diameter direction of the vent hole) as if it were a metal plate provided with a lath. It has a mechanical property that it stretches well in the direction perpendicular to the direction (direction perpendicular to the direction of applying tension, the minor axis direction of the vent hole).

  For this reason, the protective cover body for growing plants according to this embodiment is extremely useful for wrapping vulnerable plants, and controls the ventilation, moisture, and sunlight transmission by freely adjusting the opening area of the vents. It has the excellent advantage of being able to.

  Hereinafter, the protective cover body for growing plants according to the present embodiment will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a structure of a flower pot protective cover body 11 that covers the flower pot C. FIG. FIG. 2 is a perspective view showing the structure of the multi-film 12 covering the ridges.

  The protective cover body for growing plants according to the present embodiment is used as a protective cover body 11 for a potted plant that protects a potted plant E from frost, rainwater, or the like, or protects a planted plant E or a planted plant E, etc. It is used as the multi film 12 to be used.

  That is, as shown in FIG. 1, the flower pot protective cover body 11 has a lower opening K or an upper opening K (not shown), and has a seal portion S at the end opposite to the opening K. It is formed in a bag shape.

  Moreover, as shown in FIG. 2, the multi film 12 is formed in the sheet form coat | covered on the straw U of a farm field.

  In this invention, the protective cover body 11 for flowerpots and the multifilm 12 have the characteristics in the point which the bag main body or the multifilm main body formed with the cylindrical film D with a hole, as shown in FIG.1 and FIG.2.

  FIG. 3 is a diagram illustrating a state in which a plurality of elliptical air holes B that are long in the vertical direction are opened in the tubular film D with holes.

  That is, when the tubular film D with a hole is covered and attached to the flower pot C as the protective cover body 11, a plurality of elliptical vent holes B opened in the tubular film D with a hole used as a protective cover body are shown in FIG. As shown in 3 (a), the longitudinal direction of the ellipse is arranged in parallel with the upper and lower covering directions of the protective cover body 11.

  Therefore, the bubble folds around the periphery of the air hole B are easily covered in the longitudinal direction along the longitudinal direction, and after the coating, the lateral displacement of the tubular film D hardly occurs due to the resistance of the bubble folds.

  By utilizing such a tubular film D with a hole as the protective cover body 11 for the flower pot C or the planter P, an effect different from that of a normal protective cover body for a flower pot is exhibited. Furthermore, various effects different from those of the normal multi-film 12, that is, effects such as prevention of lateral slippage from raindrops due to mist dripping of rainwater and wind and rain can be exhibited.

  Below, the manufacturing method of the tubular film D with a hole which comprises the protective cover body 11 for flowerpots and the multifilm 12 which concerns on this embodiment is demonstrated based on FIGS.

  First, a thermoplastic resin raw material selected from polystyrene, polypropylene, high-density polyethylene, etc. is heated and melted, and a foaming agent is mixed therein to generate a large number of large and small bubbles in the molten resin raw material. After the tubular film is gelled from the semi-cured state until it is formed into a tubular film, in a state in which bubbles are contained in the peripheral wall of the tubular film F, and then wound into a flat shape. A cylindrical film D with holes by bursting air bubbles in the peripheral wall of the cylindrical film F by bubble bursting means to open a large number of vent holes B of different sizes and shapes in the entire peripheral wall of the cylindrical film F in irregular order; The cylindrical film D with a large number of holes is cut and formed into a predetermined shape capable of covering the whole growing plant E.

  As shown in FIG. 4, a tubular film forming apparatus 100 with a hole for producing such a tubular film D with a hole is obtained by heating and melting a thermoplastic resin raw material 41 and mixing a foaming agent therein. A heating and melting means 40 for generating a large number of large and small bubbles, an extrusion means 46 for forming the bubble-containing resin material into the cylindrical film F in a state in which bubbles are contained in the peripheral wall of the cylindrical film F, and a cylindrical shape. Until the film F is wound into a flat shape, after the cylindrical film is gelled from a semi-cured state, bubbles in the peripheral wall of the cylindrical film F are ruptured to form a size and shape on the entire peripheral wall of the cylindrical film F. A bubble rupturing means 47 for opening a large number of different vent holes B in irregular order, a winding means 54 for winding the cylindrical film D with a flat shape into a roll, and a growing plant with the cylindrical film D with a hole. Cover the entire E Constituted by a cutting shaping means for cutting formed in the ability of a predetermined shape (not shown).

  The heating and melting means 40 includes a melting tank 42, a heater 44, and a transfer conveyor 45.

  That is, as shown in FIG. 4, the heating and melting means 40 constitutes a melting tank 42 so that a thermoplastic resin raw material 41 can be accommodated, and an inlet 43 for introducing the molten resin raw material is formed above the melting tank 42. A heating heater 44 for heating the thermoplastic resin raw material 41 accommodated in the melting tank 42 is configured, and a conveying conveyor 45 including a screw conveyor is configured in the melting tank 42.

  As shown in FIG. 5, the extrusion molding means 46 is continuously connected to the conveying tip side of the melting tank 42, and the inner frame mold 46-1 is held by holding slits at a predetermined interval in the outer frame mold 46-2. The slit in the space between the inner frame mold 46-1 and the outer frame mold 46-2 is formed to form an annular slit 63 for extruding the thermoplastic resin material 41 melted by the melting tank 42 into a cylindrical shape upward. doing.

  In addition, the slit width of the annular slit 63 gradually decreases upward, and the end opening edge constitutes an extrusion port 62 for forming the tubular film F, and the film thickness is controlled by the width of the extrusion port 62. By adjusting. Reference numeral 62 denotes a resin passage communicating with the inside of the outer frame mold 46-2.

  The bubble rupture means 47 ruptures bubbles in the peripheral wall of the cylindrical film F formed by the extrusion means 46, and the disk 50 laminated in a plurality of stages at regular intervals and its outer peripheral edge face downward. An air pocket space 58a having a substantially triangular cross section formed by a disc tip edge 58b formed on the inclined surface and having an acute angle, an inner peripheral surface of the cylindrical film F in contact with the edge, and air between the stacked discs 50 And an air supply path O for supplying air. Moreover, as will be described later, the initial stage of extrusion molding of the tubular film F is a semi-cured resin, and then gelled to solidify the bubbles and break the bubbles by the bubble rupture means 47.

  In addition, the multi-stage disks 50 stacked at regular intervals above the annular slit 63 in the extrusion molding means 46 gradually increase in diameter from the lowest layer to the third to fourth stages, and the upper stage has the same or slightly larger diameter. It is a laminated disk.

  Furthermore, the thermoplastic resin raw material 41 that is extruded from the lowermost layer to a plurality of stages, for example, 3 to 4 stage disks, becomes a cylindrical shape with an expanded diameter, remains an uncured resin raw material, that is, does not gel. Extrusion is performed at a speed that keeps the shape as it is. Although it is in an uncured state, it is a state in which a certain sheet-like shape is maintained, and has a viscosity sufficient to be continuously pulled upward.

  The tubular film F extruded in this uncured ungelled state contains bubbles, but since the resin raw material has a viscosity in a semi-molten state, the cell peripheral wall in the semi-cured state Elongates and the contained bubbles also elongate in the longitudinal direction. However, in this state, the bubbles have not broken.

  Then, when it is pushed out from the annular slit 63 and goes up from the third to fourth stages of the disk in 0.5 to 1.8 seconds, the resin raw material gradually gelates from the uncured state, and the bubbles are solidified on the gelled bubble peripheral wall. The bubbles are completely broken by the bubble rupture means 47, and a large number of holes are formed on the peripheral wall of the tubular film F due to the broken bubbles.

  Thus, the cylindrical film F formed by the extrusion molding means 46 and pulled up along the outer peripheral edge of the laminated disk is a resin raw material from the lower layer disk to the disk 3 to 4 steps above. Moves upward in an uncured state, gradually becomes a gelled state and is pulled up. This makes it possible to understand the following situation.

(1) If the distance pulled up in the uncured state from the lowermost disk is increased (if the number of stacked disks increases), then the included bubbles are pulled vertically and gradually gelled and ruptured. Large bubbles that are elongated vertically are formed.

  In other words, it is possible to adjust the size of the vertically elongated holes of the ruptured bubbles by adjusting the distance and time for pulling the uncured resin raw material, the number of laminated disks guided in the uncured state, and the like. For example, in this embodiment, the time until the uncured resin raw material is gelled (solidified to such an extent that bubbles can be broken) is 0.5 to 1.8 seconds.

(2) Since the uncured resin raw material gradually gels with the passage of time when pulling up the tubular film F, it is possible to adjust the size of the vertically elongated holes of the bursting bubbles by adjusting the pulling speed. it can. For example, in this embodiment, the pulling-up (winding) speed of the tubular film F is 10 to 25 m / min.

(3) Longitudinal formation of bubbles formed by pulling the uncured resin raw material upwards (vertically long elliptical holes) is formed on the left and right edges of the rupture folds when ruptured in a gelled state. Rupture folds but flutters vertically. As a result, the surface of the hole in many cylindrical films does not interfere with the folds on the left and right edges of the film in the traveling direction, and it is easy to slide. It becomes a projecting piece and interferes with skidding, making it difficult to slip. Therefore, when the film is used as a protective cover for growing plants, it is easy to handle the plant E from above or removed from the upper side. It can function as a covering protective cover body that uniformly covers the plant without being shifted to one side of the plant by wind pressure or the like. Furthermore, since the left and right edge folds exist in the vegetation state at the periphery of the vent hole B, rainwater does not flow directly into the vent hole B along the surface of the tubular film F, and the tubular film F is formed as fine mist rainwater. It is sprayed from the housed plant.

(4) When the tubular film F is pulled up, it is pulled up along the outer peripheral edge of the disk, but since the tubular film is uncured from the lowermost layer to several stages of disks, it is expanded by air pressure. It is enormous and there is almost no contact with the outer periphery of the disk, and there is no disk resistance for pulling up the cylindrical film. However, the hardened film is easily pulled up by being easily slid between the inner surface of the cylindrical film which has been gelated and hardened as it is displaced upward and the outer periphery of the disk.

  That is, as shown in FIG. 6 (a), the disk 50 is stacked in a plurality of stages at regular intervals, and the diameter of the disk 50 arranged at the lowermost part is the smallest, and the third stage is a predetermined diameter from the lowermost stage. Up to this point, the diameter is increased stepwise, and from the fourth stage, the diameter is the same and a plurality of stages are stacked.

  Further, as shown in FIG. 6A, the outer peripheral edge of the disk 50 forms a disk front edge 58b formed at an acute angle by an inclined surface directed downward.

  Further, the hollow pipe 51 that supports the stacked discs 50 at the center forms an air supply path O for sending air into the interior, and compressed air is supplied from the air supply means 60 of the compressor through the air supply pipe 61. Air. A plurality of air outlets 57 are provided on the outer peripheral wall of the hollow pipe 51 to send air between the stacked disks.

  The winding means 54 is disposed above the laminated disk including the bubble rupturing means 47, and includes a flat means 52 composed of two elastic guide wires 52a and 52a, a pair of pinch rollers 53 and 53, and a guide roller. 55, 55 and a winding device (not shown).

  The cutting and forming means (not shown) is disposed on the lower side of the tubular film D with holes wound by the winding means 54, and seals the seal portion S by sealing the size of the cover body of the plant E. And a perforation forming mechanism (not shown) for forming a perforation (not shown) so as to be cut at the rear edge of the seal portion.

  In addition, when using as the multi film 12, since it uses as a longitudinal film without sealing, arrangement | positioning of the said sealing mechanism and the said perforation formation mechanism can be made unnecessary.

  The method and apparatus for producing the holed tubular film D as the protective cover body 11 by the holed tubular film forming apparatus 100 are as described above.

  In addition, as shown in FIG. 4, the tubular film D with a hole is folded in a flat shape while being guided along the outer sides of the left and right elastic guide lines 52a and 52a.

  Then, the take-up means 54 takes up a roll as a roll-shaped protective cover body (not shown) by a take-up device (not shown) through a pair of pinch rollers 53 and 53 and guide rollers 55 and 55.

  In the case of the multi-film 12, after being wound in the form of a tubular film D with a hole, it is changed to a long sheet having a constant width by opening the tubular film D with a hole in the axial direction while unwinding. Then, it is made to be wound up by another winding device.

  Here, referring to FIGS. 4 to 6, bubbles in the peripheral wall of the tubular film F are broken by the bubble bursting means 47, and a large number of air holes B having different sizes and shapes are formed on the entire peripheral wall of the tubular film F. Will be described.

  As shown in FIG. 4, the tubular film F stretched to a predetermined thickness is wound upward by the winding means 54 while being in contact with the disk leading edges 58 b of the plurality of disks 50.

  A disc tip edge 58b is formed at the outer peripheral end of the disc 50 with an acute inclined surface facing downward, and an upper end acute angle portion 58c is formed at the disc tip edge 58b of the disc 50. The inner peripheral surface of the tubular film F contacts the acute angle portion 58c.

  When air is supplied between the plurality of air outlets 57 provided on the outer peripheral wall of the hollow pipe 51 through the air supply path O, the front end edge 58b of the disk 50 and the inner periphery of the tubular film F are supplied. An air reservoir space 58a having a substantially triangular cross section is formed between the surface and the surface.

  And at the initial stage of extrusion molding of the tubular film F, as described above, the resin is in an uncured state and thus has viscosity, and does not break even if the bubbles are expanded by air pressure. However, when gelled, the bubbles contained in the resin are solidified and broken to form bubble breakage holes in the thin film.

  That is, the compressed air blown inward of the tubular film F is pumped from the lower opening of the air reservoir space 58a toward the upper narrowed portion of the air reservoir space 58a, and is gelled by the pressure sending force. Of the inner peripheral surface of the cylindrical film F, the inner peripheral surface of the cylindrical film F located in the air reservoir space 58a around the periphery of the disk 50 is greatly bulged to promote bubble breakage.

  In addition, the said disc front-end | tip edge 58b is not restricted to the shape of Fig.6 (a), As shown in FIG.6 (b), the inclined surface toward the downward direction can also be comprised in curved shape.

  Also, by heating the air blown into the tubular film F from the air outlet 57, it becomes heated and expanded air, and the inner peripheral surface of the tubular film F is pressed more strongly in the air reservoir space 58 and ruptured. It can also be configured to.

  Further, the opening diameter of the air outlet 57 is set to a diameter at which a blowing sound is generated by the pressure-fed and supplied air.

  By adopting such a configuration, it is possible to generate a standing wave by reverberating the blowing sound in the space formed between the disks 50, and to promote bubble breaking by the sound pressure of the standing wave.

  In this way, as shown in FIG. 7A, the longitudinally oblong air bubbles A having a width L1 at the center portion enclosed in the tubular film F are formed from the inside of the tubular film F. As shown in FIG. 7B, the central portion is pushed and expanded in the lateral direction from the width L1 to the width L2 by the pressing bias by the air pressure.

  Then, the thin film on the surface covering the bubble A is ruptured by the contact between the inner peripheral surface of the cylindrical film F and the acute upper end 58c of the outer peripheral upper end edge of the disk 50 and the air pressure of the air retaining space 58a. A large number of elliptical vent holes B in the longitudinal direction of the tubular film F are irregularly pierced and opened at different positions with different sizes and shapes.

  As shown in FIG. 8A, the surface of the bubble A enclosed in the resin of the tubular film F is covered with a thin thin film F1, and as described above, the air pressure in the air reservoir space 58a is pressed. The thin film F1 on the surface of the bubble A is ruptured, and as shown in FIG. 8B, an elliptical air hole B that is long in the longitudinal direction of the tubular film F is opened.

  Further, as shown in FIG. 8 (b), the inner peripheral end face of the air hole B formed in the tubular film F has a rupture piece F2 due to bubble breakage of the thin film F1 covering the surface of the ruptured bubble A, so-called rupture. The folds remain side by side along the outer periphery of the bubble break.

  Thus, the air bubble rupturing means 47 can open a large number of air holes B on the entire peripheral wall of the tubular film F in different sizes and shapes.

  Even in this case, since the plurality of air holes B opened in the tubular film F are elongated in the uncured resin, the longitudinal direction is combined with the state of being wound up by the winding means 54. It is formed in an oval shape. Furthermore, when the compressed air is blown into the tubular film F from the air outlet 57, the thermoplastic resin raw material 41 as the raw material of the tubular film F is cooled, and as shown in FIG. The air holes B are gelled in an elliptical shape that is long in the vertical direction.

  In this way, a large number of perforated tubular films D can be obtained, and this perforated tubular film D can be used as the main body of the protective cover body 11 for flowerpots or the multi-film 12 that can cover the upper surface of the ridge U. Use as a body.

  Hereinafter, a specific method of using the protective cover body 11 for a flower pot will be described.

  When used for the protective cover body 11 for flower pots, the roll-shaped protective cover body (not shown) formed by the tubular film forming apparatus 100 with holes is cut one by one by perforation while being unrolled into a strip shape. By doing so, the protective cover body 11 for flowerpots which has a predetermined shape is obtained.

  And as shown in FIG. 1, the protective cover body 11 for flowerpots has the magnitude | size which can coat | cover the whole growing plant E, and is comprised so that it can coat | cover with respect to the flowerpot C from upper direction or the downward direction. .

  That is, it has a bag shape having a seal portion S at the lower portion and an opening K at the upper portion.

  Moreover, the protective cover body 11 for the flower pot has a narrow width of the vent hole B due to the tension along the longitudinal direction of the sheet at the time of manufacturing the elliptical shape along the sheet pulling direction at the time of manufacturing. On the other hand, the width of the vent hole B can be widened by pulling in the width direction of the sheet at the time of manufacture.

  That is, when the protective cover body 11 is attached to the flower pot C, the plurality of vent holes B formed in the tubular film D with holes constituting the main body of the protective cover body 11 have a longitudinal direction in the vertical direction of the protective cover body. Therefore, as shown in FIG. 3B, the stretched tubular film D is excellent in stretchability in the width direction.

  In addition, about the cylindrical film D with a hole, it can also be comprised so that it can be hold | maintained as it is, without expanding and contracting, or shrinking | contracting after extending | stretching.

  By utilizing this property, as shown in FIG. 1, the protective cover body 11 that protects the flower pot C or the like can be inserted while being expanded in the width direction, and the protective cover body 11 having a bag shape. The mouth edge of the opening K can be contracted and closed.

  In this way, the flower pot C and the entire growing plant E can be covered with the protective cover body 11.

  In addition, when used for a flower pot C, by using a cylindrical film formed in a bag shape with the lower part sealed and an upper opening K, it can be formed into a flower pot C stored in the bag, It can be carried in the form of a bag.

  And the tubular film D with a hole which comprises the protective cover body 11 for flowerpots has a hole with a different magnitude | size, but this hole functions as an infinite number of ventilation holes B.

  That is, the vent hole B is formed on the protective cover body 11 in different shapes, and can be taken in through a wide variety of vent holes B while being circulated in various ways. Can give air.

  The amount of sunlight received can also be adjusted, and the amount of received light necessary for photosynthesis can also be adjusted by the size of the air holes B on the tubular film D with holes.

  Further, the protective cover body 11 can be colored. For example, the color can be changed according to the color of the flower, and the discrimination is rich.

  In addition, by changing the color of the protective cover body 11, an optimal photosynthetic function exerted on the plant E can be achieved.

  In addition, the solar light function adjustment can be achieved in combination with the adjustment of the air amount.

  Alternatively, the protective cover body 11 for flowerpots is made black so as to increase the light shielding property in summer.

  Furthermore, the fine ventilation hole B of the protective cover body 11 for flowerpots can prevent infiltration of frost and a large amount of rainwater.

  That is, it is possible to prevent a large amount of water from entering the plant E, prevent root rot due to the intrusion of a large amount of water, and perform an appropriate water supply.

  In addition, the thing from which the magnitude | size of a hole differs according to conditions, such as frost and rain water, can be used properly.

  And it can be set as the form which sprays water with respect to the plant E by the fine ventilation hole B in the shape of a mist.

  In addition, in order to prevent the growing plant E on the flowerpot C from being eaten by pests such as slugs, aphids, snails and ants, and by pests such as spiders and birds, insecticides are usually used. In the invention, an insecticide becomes unnecessary by using the tubular film D with holes as the protective cover body 11.

  That is, in this invention, it is set as the protective cover body 11 for flowerpots which applied the cylindrical film D with a hole, and this becomes a repellent material and can prevent the penetration | invasion of the said pest etc.

  FIG. 9 is an explanatory view showing the overall structure of the flower pot protective cover body 11 applied to the flower pot C provided with the support rod 15.

  In addition, the space rod is formed between the inner peripheral surface of the protective cover body 11 and the plant E by standing the support bar 15 in the flower pot C and covering the protective cover body 11 above the support bar 15. It also has a role of preventing the inner surface of the bag from contacting the plant E.

  Moreover, the form of the protective cover body 11 for flowerpots can be made into a cylindrical shape or a bag shape when mounted on the flowerpot C depending on the number and arrangement of the support bars 15 and the like. As a result, the appearance of the product or the like is improved.

  Furthermore, as shown in FIG.1 and FIG.9, it is comprised so that it may fasten with the fastener 13 in the upper end part and lower end part of a bag. In the protective cover body 11 for a flowerpot according to the present invention, the distal end portion of the fastener 13 is easily locked by the vent hole B in the tubular film D with a hole.

  That is, a minute uneven surface is formed by the vent B of the flower pot protective cover body 11 and the bag body, and this uneven surface functions as a slip stopper for the fastener 13.

  Moreover, the bag body improves the grounding property to the fastener 13 because of the soft resin material.

  In addition, in this invention, a latching | locking part can also be comprised in the cylindrical film D with a hole so that it can latch to the flowerpot C etc.

  That is, the vent hole B is provided with a locking part (not shown) by drilling a large round hole or a substantially triangular hole, and the locking part is a convex part or concave part such as a hill on the bottom of the flower pot C. The whole flower pot C in which the plant E is grown can be covered by using the elasticity of the tubular film D with holes.

  In this case, the locking portion is provided on the opening K side of the bag-like protective cover body 11 having the lower opening K.

  Furthermore, an LED bulb or the like can be disposed in the protective cover body 11. That is, it is possible to produce an unusual Christmas tree by covering the Christmas tree with LED bulbs.

  Next, the case where the protective cover body 11 is applied to the planter P will be described.

  In the above, what formed the cylindrical film D with a hole in the bag shape was applied to the flower pot C, but it can be used as the protective cover body 11 for the planter P.

  FIG. 10 is an explanatory view showing the overall structure of the protective cover body 11 for the planter P. As shown in FIG.

  As shown in FIG. 10, when used in a horizontally long planter P, unlike the form of the flower pot C, the protective cover body 11 formed in a bag shape having a seal portion S at the top and a lower opening K is provided. It is possible to take a form in which the plant E is used by being covered with the plant E to protect only the plant E vegetated on the planter P.

  Next, a specific method of using the multi-film 12 will be described with reference to FIG. FIG. 2 is an explanatory diagram for explaining an application example of the multi-film 12.

  The multi-film 12 is attached to the rear part of the tractor, in order from the front side, with a vertical marching device equipped with a rotary tiller, a vertical shaper, and a multi-film laying device. It is to be laid on the fence U.

  Ordinary multi-films are intended to suppress ground temperature rise and weed suppression in the ridge U, but in the present invention, as shown in FIG. 2, the modified sheet material from the tubular film D with holes is applied. By this, the effect which is excellent in the elasticity which the conventional multi film does not have is exhibited.

  That is, by applying the multi-film 12 that is wound in a long shape with a constant width and uncovered so that the upper surface of the raised portion of the field ridge U can be covered along the longitudinal direction of the ridge U, The upper surface of the heel U can be covered while expanding and contracting.

  In addition, although the protective cover body 11 for the flower pot is configured as a bag shape, the multi-film 12 does not have a cylindrical shape, but a single sheet having a certain width by cutting the cylindrical film D with holes in the axial direction. The sheet is used by modifying it into a long shape.

  As shown in FIG. 2, when the multi-film 12 is coated, the multi-film 12 can be extended left and right by using the air holes B of the tubular film D with holes. In addition, it can be freely selected according to the width of the horizontally long ridge U. On the multi-film 12, a plurality of through-holes 14 through which the leaf stems of the plant E grown on the ridge U are passed can be arranged at predetermined intervals in the vertical and horizontal directions.

  The multi-film 12 of the present invention can be applied for each color depending on the place and environment. For example, when the light shielding property is required, the black multi-film 12 is used.

  Moreover, pests etc. can be repelled by using the multifilm 12 which has light reflectivity.

  Thus, by setting it as the multifilm 12 using the tubular film D with a hole, the tubular film D with a hole which is rich in elasticity can be applied, and it can be coated along the shape of the ridge U. In addition, it has an effect of protecting from dew damage and rainwater.

  As mentioned above, although this invention has been demonstrated through the present Example, this invention is not limited to these. Moreover, each effect mentioned above only enumerated the most suitable effect which arises from this invention, and the effect by this invention is not limited to what was described in the present Example.

B Ventilation hole E Growing plant D Cylindrical film with hole F Cylindrical film K Opening portion O Air supply path U １１ 11 Protective cover body 12 Multifilm 41 Thermoplastic resin raw material 47 Bubble bursting means 50 Disk 52a, 52a Elastic guide wire 58b Disc edge 58a Air pocket space

Claims (5)

The thermoplastic resin raw material is heated and melted, and a foaming agent is mixed therein to produce a large number of large and small bubbles in the molten resin raw material.
The bubble-containing resin raw material is formed into a cylindrical film, the bubbles are contained in the peripheral wall of the cylindrical film, and then the bubbles in the peripheral wall of the cylindrical film are wound up in a flat shape. The air bubble is ruptured by air bubble rupturing means, and a large number of vent holes with different sizes and shapes are formed in irregular order on the entire peripheral wall of the tubular film, and the tubular film with such a large number of holes can be covered over the entire growing plant. A protective cover body for growing plants, characterized in that it is formed by cutting and forming.   The bubble rupture means is a disc formed between a disc laminated at a plurality of steps at regular intervals, a disc tip edge formed at an acute angle by an inclined surface with its outer peripheral edge directed downward, and an inner peripheral surface of the cylindrical film along it. 2. The protective cover body for a growing plant according to claim 1, comprising a substantially triangular air reservoir space and an air supply path for supplying air between the stacked disks.   After opening a large number of air holes in the entire peripheral wall of the tubular film, the tubular film is folded into a flat shape while being guided along the outer sides of the two left and right elastic guide lines, and then cut into a predetermined shape. The protective cover body for growing plants according to claim 1 or 2, wherein   The said cover body was formed in the bag shape which has the lower opening part or the upper opening part, The protective cover body of the growth plant of any one of Claims 1-3 characterized by the above-mentioned.   The cover body is changed from a cylindrical shape to a long sheet having a fixed width, wound and unwound, and the shape is such that the upper surface of the raised portion of the field fence can be covered along the longitudinal direction of the fence. The protective cover body of the growing plant of any one of Claims 1-4 characterized by these.

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