JPH0650436U - Plant cultivation floor and its parts - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain an inexpensive plant cultivation bed that is easy to sterilize with steam and cultivates. [Structure] A steam pipe 22 made of aluminum is attached to a bottom wall 12 of a cultivation floor main body 10 which is an injection-molded product of a thermoplastic resin containing glass fibers by a pipe fitting 36. Since the pipe fitting 36 allows the steam pipe 22 and the cultivation floor main body 10 to be displaced in the longitudinal direction, damage to the cultivation floor main body 10 or the pipe fitting 36 due to the difference in thermal expansion during steam sterilization is prevented. .. The steam pipe 22 is a pair of fins 2.
6 is provided to prevent relative rotation and lateral movement with respect to the cultivating floor main body 10, so when a small cultivator is attached to the cultivator rail 16 at the upper end of the side wall 14 to cultivate the soil in the cultivating floor main body 10, a steam pipe is used. It is possible to easily perform steam sterilization and cultivating without shifting the position of 22 or interfering with the cultivator. Further, the cost can be kept low as compared with the case where the cultivation floor body 10 is made of aluminum.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plant cultivation bed used for cultivating melon and the like and its constituent members.

[0002]

[Prior art]

 Plants such as melons are usually grown in cultivation beds isolated from other soils. An example of such a plant cultivation floor is shown in FIG. In the figure, the cultivation bed main body 200 includes a bottom wall 204 and a pair of side walls 206 rising upward from both ends of the bottom wall 204, and has a U-shaped cross section. The main body 200 is supported by a plurality of blocks 208 on the lower surface of the bottom wall 204, soil 210 is piled up inside, and seedlings 212 are planted as shown by a chain double-dashed line in the figure. Further, as shown in FIG. 21, a steam pipe 216 made of metal is embedded in the soil 210. The steam pipe 216 is separate from the main body 200 and has a large number of steam ejection holes 218.

After the seedlings 212 have grown and the fruits have been harvested, unnecessary leaves and stems are removed and the soil 210 is cultivated. Then, as shown in FIG. 21, the main body 200 is covered with the cover 220, and high-temperature steam is supplied into the steam pipe 216 in a state where each end of the cover 220 is pressed by pressing members such as timber (not shown). It As a result, as shown by the arrow in FIG. 21, steam is ejected from the steam ejection holes 218 to kill bacteria in the soil 210. After the soil 210 is sterilized by steam in this manner, a new seedling 212 is planted in the soil 210. For example, in melon cultivation, the above work is repeated in a cycle of about 3 months.

In the plant cultivation floor as described above, the main body is made of wire mesh or a press-molded product of long glass fiber impregnated thermoplastic resin (hereinafter referred to as a resin press-molded product) or an aluminum product. Things are being used. In the main body made of wire mesh, cloth such as ginseng was laid on the inside, and the soil was prevented from flowing out by laying the soil in the cloth. The main body made of wire mesh has excellent breathability, and when steam sterilization is performed, heat is satisfactorily transferred to the entire soil and a high sterilization effect can be obtained. Also, there is an advantage that water can be spread evenly over the soil even when watering. In particular, if the body does not have good air permeability, only the surface of the soil will be dried, and the operator may judge that there is insufficient water even if the soil contains a large amount of water. However, water can be sprinkled on the wire mesh main body without excess or deficiency.

On the other hand, when the main body is a resin press-molded product, there is an advantage that the main body is stronger than the main body made of wire mesh. Conventionally, rails for small cultivators were installed on the upper ends of a pair of side walls during press molding, and a small cultivator was run on the rails to cultivate the soil. It can be done easily.

Further, the aluminum main body can also be cultivated by using a small cultivator like the resin press-molded product.

[0007]

[Problems to be solved by the device]

 However, in the above-mentioned plant cultivation bed, the steam pipe must be buried and removed in the soil every time steam sterilization is performed, which is troublesome. For example, in melon cultivation, each farmhouse holds 10 or more cultivation greenhouses, and each of these cultivation greenhouses is usually provided with about 200 plant cultivation beds. In order to always deliver a fixed amount of fruits, the greenhouses have different cultivation cycles. Therefore, steam sterilization is almost always performed, and the work of burying and removing steam pipes must be performed frequently, which is a heavy labor.

[0008] If the steam pipe is fixed to the cultivation bed main body, the burying and removing work as described above becomes unnecessary, but since the cultivation bed main body and the steam pipe are made of different materials, the coefficient of thermal expansion is different. Both connections are damaged during steam sterilization. For example, in the above-mentioned plant cultivation floor, in order to perform steam sterilization of the soil 210 for one ridge (about 22 m) in the greenhouse for cultivation, the cultivation floor main body 200 made of polypropylene and the pipe 216 made of aluminum are respectively 100 Assuming that it is heated to ° C, the main body 200 is extended by 55 mm and the pipe 216 is extended by 50 mm, which results in a displacement of about 5 mm between the two. Therefore, when the main body 200 and the pipe 216 are fixed with machine screws, the displacement causes the main body 200 to be distorted or cracks to occur around the screw holes.

If the steam pipe 216 is only embedded in the soil 210 without being fixed with a small screw or the like, the above-mentioned distortion and cracks can be avoided. When cultivating 210, the small cultivator may wind up the steam pipe 216 and damage them, or the pipe may be moved in the soil 210, so that the cultivator cannot be used.

Further, in terms of material, when the cultivation bed main body is made of wire mesh, it is impossible to use a cultivator because the material strength is small, and if the operator must cultivate manually. Therefore, there is a problem that the work is difficult and time-consuming.

It is said that in the cultivation bed main body of the resin press-molded product, the resin deteriorates during use and the glass fiber is exposed on the surface, and the operator feels uncomfortable feeling that his or her hand or body is tingling. There was a problem. In addition, since a small amount of glass fibers are scattered in the air, there is a problem in that the worker may inhale the fibers to cause damage to the respiratory system due to daily work.

Further, the cultivation bed main body of the resin press-molded product cannot avoid being deteriorated by sunlight irradiation or the like. Therefore, a black pigment such as carbon has been used to prevent ultraviolet rays from penetrating into the inside of the main body and enhance weather resistance. However, in melon cultivation and the like, if the cultivation floor itself is made too black, the inside of the greenhouse becomes dark, so the weather resistance could not be sufficiently enhanced. Furthermore, since the plant cultivation floor is often kept in contact with soil for a long time of 5 years or more, various bacteria are easily proliferated on the surface of the main body. There is also a problem that molds may grow due to high temperature or water sprinkling, and may be deformed or corroded by the action of these fungi.

On the other hand, the aluminum main body has higher strength than the above wire mesh main body, and the above-mentioned problems that occur in the resin press-molded product do not occur, but the material cost is high and the plant cultivation floor is There was a problem that it was very expensive.

In the above plant cultivation floor, the main body is covered with a cover during steam sterilization. This is to prevent the steam from leaking to the outside and increase the thermal energy efficiency. However, in the above-mentioned plant cultivation floor, every time steam sterilization is performed, several workers have to carry and spread the cover or carry timber for fixing the cover, which is troublesome. There was a problem of this. Moreover, while steam sterilization was not performed, the cover and timber had to be stored in a place different from the cultivation floor, which required a large space. In addition, it is difficult to cover the cultivation floor body evenly with the cover, and there is a problem in that the degree of tightness may fluctuate and steam may escape from the gap between the covers.

The present invention has been made with the object of obtaining a plant cultivation bed capable of solving the above-mentioned various problems.

[Means for Solving the Problems]

The plant cultivation floor according to the present invention has (a) a bottom wall and a pair of side walls that rise upward from both ends of the bottom wall, and has a U-shaped cross section. The cultivation bed main body made of a synthetic resin on which the cultivator rail is formed at the upper end of the side wall of (b), (b) the cultivation bed main body is a separate body and has a large number of steam ejection holes, and (c) ) A pipe that attaches the steam pipe to at least one of the bottom wall and the side wall of the cultivation bed main body, extending along the longitudinal direction of the cultivation bed main body, and movably in the longitudinal direction relative to the cultivation floor main body. And mounting means.

In a preferred embodiment of the present invention, the steam pipe is provided with a pipe portion and a pair of fins formed on an outer peripheral surface of the pipe portion so as to extend along a longitudinal direction, and the pipe mounting The means is configured to include a step formed in the cultivation bed body to receive the pair of fins so as to be relatively movable in the longitudinal direction.

In another desirable mode, the cultivation bed main body is a thermoplastic resin injection-molded article containing a reinforcing material such as a fibrous or strip-like material.

In another desirable embodiment, the thermoplastic resin contains at least one of an ultraviolet absorber, an antioxidant and an antibacterial agent.

In still another desirable mode, at least a part of the bottom wall of the cultivation bed main body is a perforated plate portion in which a large number of small holes are formed vertically and horizontally.

[0021] In still another preferred embodiment, the plant cultivation floor extends along the longitudinal direction of the plant cultivation floor, and has a bellows-like cover that is stretchable in the longitudinal direction of the plant cultivation floor. , A plurality of sliding members attached to both ends of the cover at equal intervals and slidably fitted to the cultivator rail.

The present invention also provides a steam pipe suitable for the construction of a plant cultivation bed. This steam pipe is provided with a pipe portion and a pair of fins formed on the outer peripheral surface of the pipe portion so as to extend along the longitudinal direction, and is divided into two parts by the pair of fins of the pipe portion. A large number of steam ejection holes are formed in one of the pipe walls.

[0023]

[Action]

 In the plant cultivation floor configured as described above, a separate steam pipe is provided on the cultivation bed main body made of synthetic resin, extending along the longitudinal direction of the main body by the pipe attaching means, and in the longitudinal direction with respect to the main body. It is mounted so that it can move relative to it. The cultivating floor main body is equipped with cultivator rails at the upper ends of a pair of side walls, and after fruit harvesting, a cultivator rail formed on the main body is cultivated by placing a small cultivator and running on the rails. The soil on the floor can be easily cultivated. Further, since the steam pipe is fixed to at least one of the bottom wall and the side wall of the main body by the pipe fixing means, the steam pipe does not come into contact with or be caught in the cultivator, and the steam pipe is cultivated one by one during cultivation. There is no need to remove it from the floor. After the cultivation is completed, steam is sent to the steam pipes with the cover of the cultivation bed body, and steam is ejected from many steam ejection holes to kill the soil.

At this time, even if there is a difference in the amount of thermal expansion between the cultivation bed body and the steam pipe, the two can move relative to each other in the longitudinal direction. It is absorbed, no excessive force is applied, and there is no risk of damage.

In a preferred embodiment, where the steam pipe has a pair of fins and the cultivation bed body has a step for receiving the fins, the fins are received in the steps so that the steam pipe is longitudinally aligned. Although it may be displaced with respect to the cultivation bed main body, it is in a state where it does not move in a direction parallel to the inner surface of the cultivation floor main body and perpendicular to the longitudinal direction. It is desirable that the fins of the steam pipe be received by the stepped portion of the cultivation floor body, and that the pipe fittings that engage both the steam pipe and the cultivation floor body prevent the fins from rising from the stepped portion. When the plant is formed on the bottom wall of the cultivation floor body, it is possible to omit the use of the pipe fitting because the lifting is prevented by its own weight.

In a desirable mode in which the cultivation bed main body is a thermoplastic resin injection-molded product, the strength is increased, and it is suitable for use in a cultivator. Moreover, in order to further increase the strength, even if a raw material containing glass fiber is used, a skin layer, that is, a layer consisting only of resin, is formed on the surface of the mold during injection molding. Is not exposed on the surface of the body after molding. Therefore, even if the worker touches the plant cultivation floor with bare hands, the conventional unpleasant tingling sensation is eliminated and the work can be performed comfortably. The reinforcing material is preferably fibrous in order to effectively increase the strength of the cultivation bed body, but is preferably a strip-shaped reinforcing material such as mica in order to prevent deformation after molding. For example, a cultivation floor body containing about 10% mica and containing no other reinforcing material has less warpage after molding and has sufficient strength.

Further, when an ultraviolet absorber or an antioxidant is added to the thermoplastic resin, deterioration of the cultivation bed body due to sunlight or the like is prevented, and weather resistance is enhanced. When an antibacterial agent is added to the thermoplastic resin, it is possible to prevent various bacteria and fungi from propagating on the surface of the cultivation bed body.

When at least a part of the bottom wall of the cultivation bed main body is a perforated plate portion in which a large number of small holes are formed vertically and horizontally, air permeability is improved as compared with the case where it is not. Steam When steam is sterilized, steam can be spread all over the soil. In addition, during normal watering, it is possible to spread water well, and it is possible to carry out watering just enough.

In a desirable mode in which the cover with the sliding member is provided, if the operator contracts the cover in the longitudinal direction of the cultivation floor main body, the sliding member slides along the rail for the cultivator, so that it is easy. In addition, the cover can be removed from the cultivation bed main body, or the cover can be moved to one side of the cultivation floor main body in a contracted state. Also, when it becomes necessary to cover the cultivation floor body, pulling one end of the cover that is drawn to one side of the cultivation floor body in a contracted state causes the sliding member to slide on the cultivator rail to expand the cover. Therefore, the cultivation floor main body can be quickly covered. When the cover is removed from the cultivation floor body, the sliding member of the cover in the contracted state may be engaged with the cultivator rail, and then the cover may be extended.

In the steam pipe of the present invention including the pipe portion and the pair of fins, the portion of the pipe wall on the side where the steam ejection holes are formed is located inside the cultivation bed main body, and the pair of fins is Fix it to the cultivation floor body so that it is in close contact with the bottom wall or side wall of the plant. In this way, the fins prevent soil and plant roots from entering the back of the steam pipe.

[0031]

[Effect of device]

 As is clear from the above description, in the present invention, since the cultivation bed main body is made of synthetic resin, it is cheaper than the conventional aluminum main body, and even when a large number of cultivation beds are required, the equipment can be installed. The cost is low. In addition, since it is stronger than the wire mesh main body, a cultivator can be used and the efficiency of cultivating work is improved. Furthermore, although the steam pipe is separate from the main body of the cultivation bed, it is attached to the main body of the cultivation bed by pipe mounting means, so there is no need to bury and remove it every time steam sterilization is performed, and sterilization work can be performed easily. be able to. Moreover, since the steam pipe is attached to the cultivation bed main body by pipe mounting means so as to be relatively movable in the longitudinal direction, the difference in the amount of thermal expansion between the steam pipe and the cultivation bed main body during steam sterilization is It is absorbed by the slippage and there is no risk of damage.

When the cultivation bed main body is made of a thermoplastic resin injection-molded product containing a reinforcing material, it does not give an uncomfortable feeling to an operator as compared with a conventional resin press-molded product, and the working environment is improved. Is improved. In addition, when the strip-shaped reinforcing material is used, it is possible to reduce the warpage of the cultivation bed main body after molding.

When the thermoplastic resin contains at least one of an ultraviolet absorber, an antioxidant and an antibacterial agent, deterioration of the cultivation bed due to sunlight is reduced, weather resistance is increased, and the life of the cultivation bed is increased. The effect of prolonging the mold is obtained, or the reproduction of molds is prevented. In addition, weather resistance can be improved while avoiding darkening in the greenhouse as compared with the case of using black carbon as in the past.

When the bottom wall of the cultivation bed main body is a perforated plate portion, the distribution of steam during steam sterilization is improved, and the same high sterilization effect as that of a wire mesh cultivation bed can be obtained. In addition, water can be satisfactorily sprinkled during normal sprinkling without deteriorating the plants due to excess or deficiency of water. Moreover, since the strength is stronger than that of a wire mesh cultivation floor, a cultivator can be used and work efficiency is improved.

When the plant cultivation floor has the cover and the sliding member, the covering and opening of the cultivation floor main body can be facilitated and the working time can be shortened. In particular, the work is easier than when the cover is pressed using a pressing member such as timber, and the cultivation floor is evenly sealed, and steam sterilization can be performed well. Especially, when the cover is attached to the cultivation floor and only opened and closed, the work is particularly easy, and the space for storing the cover is unnecessary.

In addition, the steam pipe of the present invention including the pipe portion and the fins can be easily attached to the cultivation bed main body, and the fins are formed between the pipe portion of the steam pipe and the cultivation floor main body. Since the gap is closed, it is possible to avoid the growth of germs in the soil that has entered this gap.

[0037]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings and tables. 1 to 3, reference numeral 10 denotes a main body of a plant cultivation bed. The cultivation floor body 10 is a synthetic resin product formed by injection molding. The cultivating floor body 10 has a bottom wall 12 and a pair of side walls 14 that rise upward from both ends of the bottom wall 12 and has a U-shaped cross section, and is reinforced across both sides. It is reinforced by ribs 15. Rails 16 for a cultivator are formed at the upper ends of both side walls 14, respectively. In addition, the drain holes 17 are formed in a row at both ends of the bottom wall 12, and a large number of small holes 18 smaller than the drain holes 17 are formed side by side in the vertical and horizontal directions. It is used as a board. It should be noted that FIG. 1 shows only part of the small holes 18, and is omitted in FIGS. 2 and 3.

A steam pipe 22 made of aluminum is detachably attached to the cultivation floor body 10. The steam pipe 22 includes a pipe portion 24 and a pair of fins 26 as shown in FIG. The pair of fins 26 is formed on the outer peripheral surface of the pipe portion 24 so as to extend in the longitudinal direction, and the pipe wall of the pipe portion 24 is divided into the first portion 28 and the second portion 30 by the pair of fins 26. It is separated. In this embodiment, the first portion 28 is very small and most of the outer peripheral surface is the second portion 30. As is apparent from FIG. 3, a large number of vapor ejection holes 32 are formed in the first portion 28. Further, each fin 26 is inclined toward the second portion 30 as it is separated from the tube portion 24. In the illustrated example, each fin 26 extends in the direction of a tangent to the outer peripheral surface of the tube portion 24, and the surfaces of the pair of fins 26 and the first portion 28 are continuous and form a gentle mountain shape.

The steam pipe 22 is adapted to be attached to the cultivation floor body 10 by a pipe fitting 36 which is a plastic molded product. The pipe fitting 36 includes a band portion 38 as shown in FIGS. 4 and 5. The band portion 38 is a partial cylindrical portion curved along the outer peripheral surface of the pipe portion 24 of the steam pipe 22, and as shown in FIG. 6, a portion corresponding to the central angle of the second portion 30 larger than 180 degrees. I am going to hold him. Further, engaging portions 40 are formed on both ends of the band portion 38, respectively. Each engaging portion 40 includes an elastically deforming portion 42 and an engaging protrusion 44. The engagement portion 42 engages with the engagement portion of the cultivation floor body 10 by a snap action accompanied by elastic deformation of the elastic deformation portion 42, as described in detail later. In the illustrated example, the elastically deformable portion 42 is a plate-shaped portion extending from both ends of the strip portion 38 in a direction parallel to the fins 26, and the engaging portion 40 extends from each free end of the elastically deformable portion 42. In the L-shaped portion, the pipe fitting 36 as a whole forms an Ω shape.

On the other hand, the bottom wall 12 of the cultivation floor main body 10 is inclined so as to gently descend from the central portion toward both sides, and the highest central portion is provided with a longitudinal direction as shown in FIG. A groove 48 extending in the direction is formed. The bottom wall 12 is divided into two inclined portions with the groove 48 as a boundary. The inner wall of the groove 48 is a partial cylinder extending along the outer peripheral surface of the steam pipe 22 with a slight gap therebetween, and accommodates the pipe portion 24 of the steam pipe 22. The groove 48 has a depth to accommodate most of the steam pipe 22, but the width of the opening is made larger than the outer diameter of the pipe portion 24 of the steam pipe 22, and the pipe portion 24 is opened from the opening side. Can be inserted into. Reinforcing ribs 49 (see FIG. 7) are formed at regular intervals in the longitudinal direction of the groove 48. The reinforcing rib 49 is formed to compensate for the decrease in rigidity of the bottom wall 12 due to the formation of the groove 48, and the reinforcing rib 49 extends over the back surface of the portion of the bottom wall 12 where the groove 48 is formed and the vicinity thereof. The ribs 15 are formed in parallel with the ribs 15 at intervals shorter than the formation intervals of the reinforcing ribs 15.

A pair of step portions 50 are formed on both sides of the opening of the groove 48, and when the pipe portion 24 is accommodated in the groove 48, the pair of fins 26 are seated in the step portions 50, respectively. The rotation and movement of the pad 22 in the cultivation floor body 10 are prevented. In this state, the surface of each inclined portion of the bottom wall 12 of the cultivation floor body 10 and the surface of each fin 26 of the steam pipe 22 form a continuous flat surface.

In the groove 48, a plurality of openings 52 are formed side by side in the longitudinal direction of the groove 48 at equal intervals, and the pipe fitting 36 is accommodated in the openings 52. After the pipe fittings 36 are attached to the steam pipe 22 at regular intervals, the pipe portion 24 is fitted into the groove 48, and the fins 26 are seated in the step portion 50. In addition, the engaging portion 40 of the pipe fitting 36 engages with the engaging protrusion 54 as the engaging portion on the cultivation floor main body side formed on both edges of the opening 52 by snap action. .

The pipe fitting 36 can be attached to the steam pipe 22 by elastically deforming the band portion 38 to the pipe portion 24 in a direction orthogonal to the longitudinal direction. After the attachment, the band portion 38 of the pipe fitting 36 slightly tightens the pipe portion 24, and the elastically deforming portion 42 comes into close contact with the back surface of the fin 26, so that the pipe fitting 36 is easily attached to the steam pipe 22. Preventing relative movement is desirable for ease of assembly work. However, it is necessary to allow the steam pipe 22 to shift in the longitudinal direction with respect to the cultivation bed body 10 due to the difference in thermal expansion amount during steam sterilization. This deviation may be allowed by the deviation of the pipe fitting 36 with respect to the steam pipe 22 or by the movement of the pipe fitting 36 within the opening 52. In the former case, the opening 52 is sized to accommodate the pipe fitting 36, and in the latter case, the longitudinal dimension of the groove 48 of the opening 52 is larger than the dimension of the pipe fitting 36 in the same direction. It will be increased by the deviation allowance.

After being attached as described above, the engagement portion 40 of the pipe attachment 36 is in a state of protruding from the back surface of the fin 26 toward the pipe portion 24 side, and the pipe portion 24 of the steam pipe 22 is As the slanted surface 56 of the engaging projection 54 and the slanted surface 57 of the engaging portion 40 come into contact with each other as they are fitted into the groove 48 of the cultivation floor body 10, the engaging portion 40 causes the engaging portion 40 to move to the pipe portion 24. Are pushed toward each other, that is, the engaging portions 40 on both sides approach each other, and the elastic deforming portions 42 are elastically curved so that the engaging portions 40 have the narrowest gap between the engaging protrusions 54. Pass through the part. After passing, the elastic deformation of the elastic deformation portion 42 is restored, and the engagement portion 40 engages with the engagement protrusion 54. The engaging surface 58 of the engaging portion 40 and the engaging surface 59 of the engaging protrusion 54 engage with each other, but with respect to the vertical direction of both engaging surfaces 58, 59, that is, the direction perpendicular to the opening 52. Since it is slightly inclined, the steam pipe 22 is attracted to the bottom wall 12 side of the cultivation floor body 10 as the engaging surfaces 58 and 59 are engaged with each other, and the fin 26 is brought into close contact with the step portion 50. . However, since the vertical angles of the two engaging surfaces 58, 59 are close to a right angle, the once engaged engaging portion 40 does not spontaneously disengage from the engaging protrusion 54, and the steam pipe 22 is not attached to the cultivation floor body 10. Can be stably attached to.

As shown in FIGS. 8 and 9, a cover 60 is attached to the cultivation floor body 10. The cover 60 includes a plurality of arch-shaped columns 62 and a cover portion 64 stretched between the columns 62, and has a bellows shape. Sliding members 66 are attached to the ends of the columns 62, and the sliding members 66 are slidably fitted to the cultivator rails 16 of the cultivation floor body 10. Therefore, the strut 62 can move along the longitudinal direction of the cultivation floor main body 10 via the sliding member 66, and the cover 60 can expand and contract in the longitudinal direction of the cultivation floor main body 10.

When melon cultivation is carried out in a greenhouse for cultivation using the plant cultivation floor of this embodiment, as shown in FIG. 10, about 16 cultivation floor main bodies 10 are connected by small screws not shown. It is used as one ridge by being combined. Therefore, a joint portion is formed at one end of each cultivation floor body 10. In the illustrated example, a connecting stepped portion 68 having a size increased by the thickness of the cultivation floor body 10 is formed at one end of the cultivation flooring body 10, and is adjacent to the inside of the connecting stepped portion 68. The side walls 14 are joined together by machine screws with the end of the cultivation floor body 10 on the side where the connecting stepped portion 68 is not formed being fitted. The holes through which the machine screws are inserted are slightly large, and some relative movement between adjacent cultivation floor bodies 10 1 is allowed. Usually, such cultivating floors are provided in the cultivating greenhouse for one building with 4,5 ridges.

Both ends of the cultivation floor main body 10 of each ridge are closed by end walls 69 as shown in FIGS. 8 and 9. As the end wall 69, for example, a bent aluminum plate can be used, and is fixed by an appropriate fastening means such as a rivet.

In the present embodiment, the steam sterilization of the soil 70 (see FIGS. 8 and 9) piled up in the cultivation floor body 10 is performed as follows. First, in a state where the cover 60 is moved to one side as shown in FIG. 9, unnecessary stems and leaves are removed after the melon fruit is harvested. Then, a small cultivator (not shown) is placed on the cultivator rail 16 and moved along the rail 16 to cultivate the soil 70. After the cultivation is completed, the cultivator is removed from the rail 16 and the cover 60 is closed as shown in FIG. By sending steam into the steam pipe 22 in this state, steam is jetted from the large number of steam jet holes 32 to sterilize the soil 70 with steam. By covering the cultivation floor body 10 with the cover 60, the steam is prevented from being dissipated into the atmosphere, and the energy efficiency is improved.

In this embodiment, since the bottom wall 12 of the cultivation floor body 10 is a multi-hole plate portion having a large number of small holes 18, part of the steam ejected from the steam ejection holes 32 is a small hole. It is possible to surely perform steam sterilization by flowing out through 18 and spreading steam evenly throughout the soil 70. Without the small holes 18, the steam would flow exclusively upward and would not pass through the soil 70 near the bottom wall 12, so sterilization of this part might be insufficient. The steam will sufficiently flow in the soil 70 near the bottom wall 12.

When the cultivation floor body 10 does not have the small holes 18, the soil 70 near the bottom wall 12 contains sufficient water even if the soil surface is dried. Although the water content in 70 is not uniform and there is no need for water sprinkling, the operator may judge that water is insufficient and sprinkle water, which may cause damage to the melon due to excess water. If the bottom wall 12 is a perforated plate portion as in the example, excessive moisture is prevented from being accumulated only in the portion close to the bottom wall 12, and the moisture in the soil 70 becomes substantially uniform, resulting in misdispersion. To be prevented.

As described above, in this embodiment, the same effect as that of the wire mesh main body used conventionally can be obtained during steam sterilization and water sprinkling. Moreover, since the wire mesh main body has low strength, it could not be cultivated using the cultivator, but since the cultivation floor main body 10 of this embodiment is made of synthetic resin, it can be easily cultivated using the cultivator. Can be performed and the burden on the operator is reduced.

Further, in the present embodiment, since the steam pipe 22 is attached to the cultivation bed main body 10 by the pipe fitting 36 so as to be relatively movable in the longitudinal direction, the material of the cultivation floor main body 10 and the steam pipe 22 and Even if there is a difference in the amount of thermal expansion between the two due to the temperature difference during steam sterilization, relative movement based on this difference is allowed, and unreasonable force is applied to the cultivation bed body 10, the steam pipe 22, the pipe fitting 36, and the like. It is well avoided to act and damage them.

Further, in the present embodiment, since the surfaces of the steam pipe 22 and the cultivation floor main body 10 are the highest in the central portion as described above, water does not collect near the steam pipe 22 and the roots of the seedlings are kept. Rotation and water inflow into the steam pipe 22 are prevented. In addition, the opening of the groove 48 of the bottom wall 12 of the cultivation floor main body 10 is satisfactorily blocked by the pair of fins 26 being in close contact with the step 50, and the outflow of the soil 70 is satisfactorily prevented.

Further, in this embodiment, the cover 60 is always contracted to one end of the cultivation floor main body 10 and is extended at the time of steam sterilization to cover the entire cultivation floor main body 10. Therefore, it is not necessary to attach and detach the cover for steam sterilization, and the work can be performed quickly. The cover can also be used to keep the soil 70 and the seedlings warm. If it is necessary to open and close the cover 60 frequently, an electric opening / closing device should be provided and the cover 60 should be used for manual switch operation. It is also possible to open or close automatically depending on the situation.

The cultivation floor main body 10 of this embodiment is injection-molded by the mold 76 shown in FIG. The upper mold 77 of the mold 76 includes a main body 78 and a first insert 80. The first nest 80 defines one side of a portion of the cavity 82 where the bottom wall 12 of the cultivation floor body 10 is formed, and has a large number of small hole forming projections as partially enlarged in a circle. 84, the first nest 80 is combined with the main body 78 and injection molding is performed, so that a large number of small holes 18 are formed vertically and horizontally in the bottom wall 12 of the cultivation floor main body 10. It will be. 86 is a groove for forming the reinforcing rib 15.

Polyethylene, polypropylene, polyvinyl chloride, polystyrene, polycarbonate, polyamide such as nylon, polyacetal, polybutylene terephthalate, polyethylene terephthalate, etc. can be used as the injection molding material for the cultivation floor body 10, but glass is used. If polypropylene containing short fibers is used, it can be made inexpensive and have sufficient strength. It is desirable that the fiber length of the glass fiber is about 3 mm to 13 mm, and the maximum content is 60 wt%, but it is sufficient to mix 20 to 30 wt% for strength.

According to JISK 7113 and JISK 7203, a test piece cut out from a cultivation bed main body which is a conventional resin press-molded product and a test piece of a cultivation floor main body which is a resin injection-molded product as an example of the present invention are used. A strength test was performed in a room at 23 ° C. The results are shown in Table 1. The "%" indication in the table below means "wt%".

[0058]

[Table 1]

In Table 1, “C” to “N” are materials for use in the cultivation main body 10 of the present invention, in which short glass fiber is kneaded into polypropylene, and uniaxial and biaxial extrusion molding is performed. Each test piece was molded into a plastic pellet by a machine and then molded by a hydraulic injection molding machine. In addition, “A” is a test piece cut out from a conventional cultivation bed main body by machining, and a sheet made by impregnating polypropylene resin into a cloth made of long glass fiber is heated to 170 to 220 ° C. It is supplied to a heated mold and pressed at a pressure of about 50 kg / cm ² .

As is clear from Table 1, “C” to “N” are superior to “A” in both tensile strength and bending strength. Also, it was revealed that the heat-resistant temperatures of the injection-molding grade polypropylenes “C” to “N” applied to the present invention were higher than those of “A” and were practically applicable.

Further, accelerated weathering by a Sansine Weather O-Meter of various injection molding resins to be applied to the present invention and long glass fiber impregnated thermoplastic resin in which the matrix of the press molding resin “A” is polypropylene A sex test was conducted. The results are shown in Table 2.

[0062]

[Table 2]

As is clear from Table 2, yellowing of young dried was found in the modified polyphenylene ethers of “to” and “chi”, but except for these, the cultivation beds of “i” to “nu” of the present invention were excluded. No glass fiber embossing was observed in any of the injection-molded resins applied to the body.

On the other hand, in “A”, after 500 hours of the accelerated weathering test, the glass fibers were clearly observed to be raised, and the surface texture changed from the initial smooth state to the rough feeling. did. In addition, “A” was found to be unpleasant to the operator's fingers due to mechanical processing during the sample preparation for this test.

On the other hand, “i” to “nu”, which are scheduled to be applied to the present invention, have a very smooth surface touch even after being deteriorated by the accelerated weather resistance test, as in the initial state, and The tingling discomfort peculiar to the glass fiber was not recognized. Further, even when the test sample was prepared, the above-mentioned unpleasant phenomenon did not occur.

From the above test results, in the conventional resin press-molded product, the resin that is the matrix is melted by heat during molding, and the glass fiber is solidified in a state of being floated on the surface. It is estimated that there is a problem with. On the other hand, the injection-molded product applied to the present invention has a skin layer formed on the product surface to prevent glass fibers from protruding on the surface of all materials including polypropylene. It is estimated that glass fiber does not cause a tingling sensation due to factors such as different morphologies. The reason why the skin layer is formed on the injection-molded product is that when the molten material is injected into the mold, the solid glass fibers do not flow with the resin and tend to gather inside the molded product. it is conceivable that.

In addition, as the resin material applied to the present invention, it is desirable to add an ultraviolet absorber or an antioxidant in order to extend the life of the cultivation floor body 10. It is desirable to use salicylic acid-based UV absorbers, benzophenone-based UV absorbers, benzotriazole-based UV absorbers, and cyanoacrylate-based UV absorbers as UV absorbers. Further, as the antioxidant, it is desirable to use a phenol-based antioxidant, a sulfur-based antioxidant, a phosphorus-based antioxidant or the like. When these UV absorbers and antioxidants are used as a mixture, higher effects can be obtained than when they are used alone. For example, it is desirable that 0.1 wt% of Sanol LS770 (trade name) and 0.1 wt% of Irganox 1010 (trade name) are mixed with polypropylene containing short glass fibers.

Further, in order to impart weather resistance to the main body, it is desirable to use mica such as suzolite mica shown in Table 1 above as a filler. The mica is oriented parallel to the surface, preventing UV light from reaching the interior of the body. In addition, it has been confirmed that mica-based fillers are also effective in preventing warpage of large-sized molded products, so it is desirable to add them to the material of the cultivation bed body.

Further, if a synthetic resin antibacterial agent is used as the material of the cultivation bed body 10, it is possible to prevent the growth of mold and other germs on the surface of the cultivation bed body 10 and further extend the life of the cultivation bed body 10. be able to. As the antibacterial agent for synthetic resin, for example, it is desirable to use binazine, prebentol, thiabendazole, silver zeolite, silver-based inorganic antibacterial agent, etc., and particularly to use silver-based inorganic antibacterial agent.

An antibacterial test was conducted on a molded product obtained by adding 1 wt% of a silver-based antibacterial agent to polypropylene containing glass short fibers applied to the present invention. The results are shown in Table 3.

[0071]

[Table 3]

In this test, a test material was injection-molded into a plate of 5 cm × 5 cm, and a bacterial solution of 0.1% was added thereto. After inoculating 2 cc and storing at 35 ° C, the surviving bacteria were washed out with sterile water, the viable cell count was measured by the pour plate culture method, and converted into the viable cell count per plate. From the test results, it was found that the addition of a silver-based inorganic antibacterial agent to the plate has an antibacterial effect on Escherichia coli and Staphylococcus aureus. Therefore, if the cultivation floor body 10 is molded by adding the silver-based inorganic antibacterial agent to the injection molding material applied to the present invention, the surface can be kept clean when the cultivation floor body 10 is used, and the plant cultivation floor can be maintained. It will be easier to maintain and the service life can be extended.

In addition, in addition, although the steam pipe 22 is made of aluminum in the present embodiment, the material is not particularly limited, and other metals such as stainless steel, copper, iron, and synthetic resin materials may be used. Can be used. In the latter case, thermoplastic resin having heat resistance such as nylon, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, thermosetting resin such as phenol resin, urea resin, melamine resin, diaryl phthalate resin, epoxy resin, or It is possible to use a material in which a filler such as wood powder, glass fiber or cellulose is filled in these thermoplastic resins or thermosetting resins. Further, although the pipe fitting 36 is a resin molded product in this embodiment, it is also possible to use a metal material such as spring steel and steel defined in JIS G4801.

In the above embodiment, the pipe attachment means is constituted by the step 50 and the opening 52 formed in the cultivation floor body 10 and the pipe attachment 36, but the pipe attachment 36 and the opening 52 are omitted. It is also possible. For example, when the step portion 50 is formed on the bottom wall 12 of the cultivation floor body 10, the fins 26 of the steam pipe 22 are pressed against the step portion 50 by the weight of the steam pipe 22 and do not float up. It is possible to omit 36 and the opening 52, in which case the stepped portion 50 constitutes the pipe attachment means.

Further, in the above-mentioned embodiment, the adjacent cultivation floor bodies 10 were coupled to each other on the side walls 14 by means of machine screws so as to be relatively movable in the longitudinal direction, but the connection form of the cultivation floor bodies 10 was changed. It is possible to For example, two cultivating bed main bodies 10 are fastened to each other in a factory by fastening means such as rivets so that they cannot be moved relative to each other, and are shipped. It is also possible to just fit into the connecting stepped portion 68 of the individual cultivation floor body 10 and not to combine them depending on the fastening means.

Further, the connecting portion between the general portion of the cultivation floor main body 10 and the connecting stepped portion 68 is a simple stepped portion in the above-mentioned embodiment, but as shown in FIG. It is also possible to use an inclined connecting portion 72. As shown in FIG. 18, the cultivation floor main bodies 10 are originally arranged so that one end of one cultivation floor main body 10 is separated from the inclined joint portion 72 by a certain distance s. If the amount of overlap between adjacent cultivation bed main bodies 10 becomes large due to thermal expansion or the like, the end of the inner cultivation floor main body 10 rides on the inclined connecting portion 72 and damage is avoided.

Further, in the cultivating floor main body 10 of the above-described embodiment, the bottom wall 12 is a multi-hole plate portion having a large number of small holes 18, but as in the cultivating floor main body 90 shown in FIG. It is also possible to have a bottom wall 92 without holes 18. This cultivation floor main body 90 can be injection molded by the same mold 76 as the cultivation floor main body 10 of the above-mentioned embodiment. That is, instead of the first nest 80 used for molding the cultivation floor body 10, a second nest (not shown) having no small hole forming projection 84 may be used in combination with the body portion 78. Of. In this way, by selecting the first insert 80 and the second insert according to the shape of the main body to be molded and using them in combination with the main body 78, one main body 78 can be used for two types of cultivation beds. The main body can be molded, and the device cost can be kept low. In the main body 90 of FIG. 12, the same parts as those of the cultivation bed main body 10 are designated by the same reference numerals, and detailed description thereof will be omitted.

Further, in the above-described embodiment, the steam pipe 22 is housed in the groove 48 formed in the central portion of the bottom wall 12 of the cultivation floor body 10, and is attached by the pipe fitting 36. It is not always necessary to install the steam pipe in the central portion of the bottom wall, and for example, the steam pipe can be attached to the side wall of the cultivation bed main body and to the corners between the bottom wall and the side wall. It is also possible to attach the steam pipe to the main body without using the pipe fitting.

For example, as shown in FIG. 13, side walls 138 and bottom wall 140 of the cultivation floor body 136 are formed with protrusions 142 and 144 protruding inward, respectively, and a pair of fins 150 of the steam pipe 148 is formed on the protrusions 142 and 144. Are engaged. The steam pipe 148 is made of resin, and the fin 150 is elastically deformable. With the second portion 154 of the pipe portion 152 of the steam pipe 148 being in close contact with the corner portions of the side wall 138 and the bottom wall 140, the pair of fins 150 are elastically curved so that their tips are protruded respectively. , 144. In this state, the tips of the fins 150 and the projections 142, 144 are in close contact with each other, and their surfaces form a continuous smooth curved surface, and steam is sent out from the steam ejection holes 158 formed in the first portion 156 of the pipe portion 152. Be done.

In addition, it is possible to use the cultivation bed main body 10 of the above embodiment without attaching a steam pipe. For example, the groove portion 48 formed in the cultivation floor main body 10 of the embodiment of FIG. 1 is covered with the strip-shaped closing plate 160 shown in FIG. The closing plate 160 has a mountain-shaped cross section with the highest central portion, and prevents water from collecting in the central portion of the closing plate 160.

That is, by using the mold 78 of the above-described embodiment and combining the presence or absence of the steam pipe and the presence or absence of the small holes in the bottom wall, as shown in FIGS. 1, 15, 16, 17 and Table 4, 4 It is possible to obtain different types of plant cultivation beds. For each of these cultivation beds, an operator can select and use an appropriate one according to the type of plant to be cultivated.

[0082]

[Table 4]

Further, in the above-described embodiment, the plurality of steam pipes 22 are integrally connected to each other to form one ridge of steam pipes. However, as shown in FIG. 19, the steam pipes 22 are axially connected to each other. It is also possible to connect them so that they can move relative to each other to some extent. In FIG. 19, reference numeral 226 denotes a connecting pipe. The connecting pipe 226 is fitted inside one of the steam pipes 22 and then fastened by an appropriate fastening means such as a rivet 228 so as to be axially inserted in the other steam pipe 22. Is fitted so as to be movable relative to each other. It is desirable to seal the connecting portion with a soft sealing material 230.

Although not exemplarily illustrated, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art without departing from the scope of claims for utility model registration. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a plant cultivation floor according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main body (cultivation floor main body) of the plant cultivation floor.

FIG. 3 is a perspective view showing a state in which a steam pipe is attached to the cultivation floor body.

FIG. 4 is a perspective view showing a pipe fitting for mounting a steam pipe on the cultivation floor body.

FIG. 5 is a side view of the pipe fitting.

FIG. 6 is a perspective view showing a state in which the pipe fitting is attached to the steam pipe.

FIG. 7 is a front sectional view showing a state in which the steam pipe is attached to the main body by the pipe attachment.

FIG. 8 is a perspective view showing a state in which a cover is attached to the plant cultivation floor.

FIG. 9 is a perspective view showing a state in which the cover is contracted.

FIG. 10 is a perspective view showing a state in which a plurality of cultivation bed main bodies in FIG. 2 are connected.

FIG. 11 is a front cross-sectional view showing a mold for injection molding of the cultivation floor main body of FIG.

FIG. 12 is a perspective view showing a main body of a plant cultivation floor which is another embodiment of the present invention.

FIG. 13 is a front sectional view showing a state in which a steam pipe is attached to a main body according to still another embodiment of the present invention.

FIG. 14 is a perspective view showing a closing plate which constitutes another form of a plant cultivation floor by being combined with the cultivation floor main body of FIG. 3.

FIG. 15 is a perspective view showing a state in which the closing plate is attached to the cultivation floor body of FIG.

FIG. 16 is a perspective view showing a plant cultivation floor which is still another embodiment of the present invention.

FIG. 17 is a perspective view showing a state where the steam pipe of the plant cultivation floor of FIG. 16 is replaced with a closing plate.

FIG. 18 is a cross-sectional view showing, in an enlarged manner, a connecting portion between the cultivation floor bodies in the plant cultivation floor which is still another embodiment of the present invention.

FIG. 19 is an enlarged sectional view showing a connecting portion of a steam pipe in a plant cultivation floor which is still another embodiment of the present invention.

FIG. 20 is a perspective view showing a conventional plant cultivation floor.

FIG. 21 is a front sectional view of the plant cultivation floor of FIG. 20.

[Explanation of symbols]

 10 Cultivation floor main body 12 Bottom wall 14 Side wall 16 Cultivator rail 18 Small hole 22 Steam pipe 24 Pipe part 26 Fin 28 First part 30 Second part 32 Steam ejection hole 36 Pipe fitting 38 Belt 40 Engagement part 60 Cover 66 Sliding Moving member 90 Cultivating floor main body 100 Steam pipe 116 Pipe fitting 136 Cultivating floor main body 148 Steam pipe

Claims (7)

[Scope of utility model registration request] 1. A cultivator rail is formed at the upper ends of a pair of side walls having a bottom wall and a pair of side walls rising upward from both side ends of the bottom wall. The cultivation bed body made of synthetic resin and the cultivation bed body are separate from each other, and the steam pipe has a large number of steam ejection holes, and the steam pipe is provided on at least one of the bottom wall and the side wall of the cultivation bed body. A plant cultivation floor, comprising: a pipe attachment means that extends along the longitudinal direction of the cultivation floor body and that is attached so as to be movable relative to the cultivation floor body in the longitudinal direction. 2. The steam pipe comprises a pipe portion and a pair of fins formed on the outer peripheral surface of the pipe portion so as to extend along the longitudinal direction, and the pipe attachment means is provided on the cultivation bed main body. The plant cultivation floor according to claim 1, further comprising a step portion formed to receive the pair of fins so as to be relatively movable in the longitudinal direction. 3. The plant cultivation floor according to claim 1, wherein the cultivation bed main body is an injection-molded article of a thermoplastic resin containing a reinforcing material. 4. The plant cultivation floor according to claim 1, wherein the thermoplastic resin contains at least one of an ultraviolet absorber, an antioxidant and an antibacterial agent. 5. The at least part of the bottom wall is a perforated plate part in which a large number of small holes are formed side by side vertically and horizontally.
The plant cultivation floor according to any one of 1 to 4. 6. A cover that extends along the longitudinal direction of the plant cultivation floor and is expandable and contractible in the longitudinal direction of the plant cultivation floor and is attached to both side ends of the cover at equal intervals. The plant cultivation floor according to any one of claims 1 to 5, further comprising: a plurality of sliding members slidably fitted to the cultivator rail. 7. A pipe portion, and a pair of fins formed on the outer peripheral surface of the pipe portion so as to extend in the longitudinal direction,
A steam pipe for a plant cultivation floor, characterized in that a large number of steam ejection holes are formed in one of the pipe walls divided into two parts by a pair of fins of the pipe portion.