JP4444613B2 - Cultivation props and cultivation tools - Google Patents

Description

  The present invention relates to a support post used for cultivation of long bamboo baskets and other vine crops, and a cultivation tool using the support post.

  There is a cultivation tool formed by standing uprights on the ground at predetermined intervals and stretching a linear object such as a net between the paralleled uprights. For example, the cultivation tool used when cultivating vine crops, such as a long bamboo basket, can be mentioned. There are also similar structures for the prevention of animal damage when preventing the entry of animals and the like.

Here, a steel pipe is generally used as a support used in a conventional cultivation tool, and an operation of driving the steel pipe into the ground and standing up has been performed. However, since the steel pipe is heavy, it takes time for transportation and work, and corrosion is inevitable. For this reason, the applicant of the present application has already proposed an internal hollow lightweight synthetic resin pipe that replaces a conventional steel pipe for a column. This synthetic resin pipe is not inferior in strength to steel pipes, and there is no fear of corrosion. Moreover, since it is lightweight and easy to work, it is also used in concrete form support pipes for construction or civil engineering (see, for example, Patent Document 1) and aquaculture pipes (see, for example, Patent Document 2).
JP-B-5-61091 (Claims, Fig. 1) Actual Hyo 2-24461 (Claims, Fig. 2)

  By using the synthetic resin pipe, the workability of fence formation and the improvement of the durability of the fence have been achieved, but the work of forming a cultivation tool by stretching a linear object such as a net on a plurality of pillars When performing or when actually cultivating, if the load by the crop on the linear object between each column or the wind pressure etc. is biased, the column may tilt or bend and deform There was a problem and a technical problem that a linear object carried on the upper end of the column easily falls off or comes off easily.

  Therefore, the present invention mainly provides a support column that is not easily tilted or deformed by an external force such as crop load or wind pressure, and is easy to stretch a linear object on the upper end of the support, and the linear object is It is an object to provide a support column that does not easily fall off and a cultivation tool using the support column.

In order to solve the above-mentioned problems, the present invention first comprises (1) a two-layer hollow pipe comprising a fiber-reinforced thermosetting resin layer and a coating layer made of a thermoplastic resin formed on the outer periphery of the resin layer, (2) A three-layer hollow pipe comprising an inner layer made of a thermoplastic resin, an intermediate layer made of a fiber reinforced thermosetting resin, and a coating layer made of a thermoplastic resin, selected from the above (1) and (2) A hollow pipe, a “plug” attached to the upper opening of the hollow pipe, and a “spiral portion” attached to the lower opening of the hollow pipe, wherein the bending rigidity of the hollow pipe is 1220 a ^{× 10 7 N · m 2 ~19600} × 10 7 N · m 2 to provide a cultivation strut.

  Since this column is lightweight, it can be easily transported and erected, and has sufficient strength, so that it does not tilt or bend and deform under the influence of external forces such as load and wind pressure. Moreover, since there is no worry of corrosion, it is suitable for a column for outdoor installation exposed to wind and rain.

If the bending rigidity of the hollow pipe is less than 1220 × 10 ⁷ N · m ² (125 × 10 ³ kg · cm ² ), even if the interval between the support columns on the ground is narrowed, the bending due to strong wind (deflection) ) Is large and the rigidity exceeds 19600 × 10 ⁷ N · m ² (2000 × 10 ³ kg · cm ² ), the unit weight of the strut increases, making it difficult to carry and work. It is not economical.

  The “bending rigidity” in the present invention is measured by the following method. A center-concentrated three-point bending test is performed at a fulcrum distance 40 times the pipe outer diameter and a bending load speed of 20 mm / min with a fulcrum having a contact surface with a radius of 30 mm and a load jig, and the load-deflection curve is calculated. The outer diameter of the struts that can satisfy these bending stiffnesses is generally 18 mm to 43 mm, depending on the thickness of the fiber reinforced thermoplastic resin layer, in the case of long bean cultivation, and the length is 0.6 to 1 in the soil. .2m, above-ground part 1.5-2.4m, total length 2.1-3.6m.

  Next, in the present invention, a concave groove for supporting a linear object is formed in the plug of the cultivation prop, and the strut is a simple operation of inserting the linear object into the concave groove. A linear object can be supported on the upper end. In the present invention, the “linear object” widely includes iron wires (numbered wires), colored iron wires, wire ropes, film yarns, ropes obtained by twisting monofilaments, and various strings.

  Further, the concave groove is formed so as to open to the upper surface of the stopper and the outer peripheral wall of the stopper, and the outer peripheral wall from the center when the stopper is viewed from above in the bottom area of the concave groove where the linear object is fixed. A lateral groove that gradually widens the width of the mouth is formed in a fan shape as viewed from above. Accordingly, by rotating the support column in a state where the linear object is supported, the lateral groove serves as a stopper (displacement prevention), and the linear object can be prevented from coming off from the upper surface of the support plug.

  In addition, the concave groove is formed in the top surface of the stopper and the outer peripheral wall of the stopper, and from each of the opposing vertical wall surfaces, a convex portion protruding toward the other vertical wall surface is formed. The part serves as a stopper (prevention of separation), and the linear object can be prevented from coming off from the upper surface of the support plug.

  And the opening of the ditch | groove formed in the said stopper was devised so that a linear thing might be easily introduced in a ditch | groove by forming so that a mouth width | variety may spread gradually toward the plug | board upper surface.

  The present invention provides a cultivation tool in which the cultivation struts having the above-mentioned configuration are arranged in parallel at intervals, and a linear object is stretched between the struts. This cultivation tool has a feature that it is easy to assemble in the field such as fields. In addition, a linear object that supports the net that is subject to load due to the stalks and vines wrapping around it is slidably supported on the upper part of the plurality of pillars, and the load on the linear objects between the pillars is supported. We succeeded in equalizing more. As a result, a load is locally applied to the linear objects between some of the columns, and the columns are not tilted, bent, deformed, or broken, and the net can be continuously stretched. It was.

  Since the cultivation support according to the present invention is lightweight, its transportation and installation work is easy, and there is no fear of corrosion and it is excellent in durability. In particular, since it does not corrode in the soil and it is difficult to attach a lump, it is easy to pull out and does not require scooping or using a machine as in the case of using a conventional steel pipe.

  Further, since it has sufficient strength and rigidity, there is no fear of breakage during installation work or use. Furthermore, unlike a conventional steel pipe column, it has moderate elasticity (flexibility) and shape recovery.

  Moreover, the support | pillar for cultivation which concerns on this invention tends to stretch a linear thing on the upper end part of a support | pillar, and this linear object is hard to drop | omit. In the cultivation tool formed by arranging this support | pillar in parallel at intervals, since a linear thing and a net | network can always be made into the tension | tensile_strength state, it is especially suitable for cultivation of vine crops, such as a long beak.

  Hereinafter, preferred embodiments of a fence post according to the present invention will be described with reference to the accompanying drawings. First, FIG. 1 is a front view showing an overall configuration (partially omitted) of the column.

  The cultivation support L (hereinafter, abbreviated as “support L”) according to the present invention includes a cylindrical hollow pipe 1, a plug 2 attached to the upper opening of the hollow pipe 1, and the hollow pipe 1. And a spire portion 3 that is attached to the lower opening and has a shape pointed downward. In addition, the code | symbols 21 and 31 in FIG. 1 represent the convex part inserted in the hollow part 104 (refer FIG. 2) of the pipe 1. FIG.

  The spiers 3 need only be provided with a shape that is gradually narrowed and pointed downward, and the angle and length of the taper can be freely selected and determined. The spire portion 3 has a pointed shape so that the column L can be easily inserted into the ground.

  The length of the hollow pipe 1 can be appropriately determined according to the purpose, and is not particularly limited. The method for attaching the plug 2 and the spire portion 3 to the hollow pipe 1 is preferably a method that can ensure water tightness and fixing strength. Various types of welding, friction welding, adhesion with an adhesive, and the like can be employed.

  The hollow pipe 1 may be formed as a simple cylindrical pipe having a smooth surface, but it is desirable that the protrusions 11 are arranged at predetermined intervals in the longitudinal direction of the pipe or the surface is embossed. . This protrusion 11 or embossing facilitates the standing work or the stretching work when standing on the ground while holding the pillar L by hand or when stretching a linear object between the pillars L, L. Demonstrate the ability to ensure. In the present invention, the “projection” includes an embossed form.

  The protrusions 11 may be arranged at predetermined intervals in the circumferential direction of the hollow pipe 1, and the number of arrangements is not particularly limited. This is preferable because the prevention function can be sufficiently and sufficiently exhibited. The shape of the protrusion 11 itself is not particularly limited as long as it is a shape that can exhibit a function of preventing hand slipping.

  In addition, the embossing may be transferred to the outer surface of the support column in the same manner as the protrusions by transferring the embossing pattern of the heat roller by contacting a heat roller having embossing with the thermoplastic resin coating layer on the surface. In this case, the effect of preventing slipping can be exhibited.

  Next, FIG. 2 is a horizontal sectional view taken along line I-I in FIG. 1 showing a first embodiment of the layer structure of the hollow pipe constituting the column.

  First, the hollow pipe 1 a has a total three-layer structure including an inner layer 101, an intermediate layer 102, and a coating layer 103 that are closely bonded to each other. The inner layer 101 and the covering layer 103 are both made of a thermoplastic resin, particularly preferably an ABS resin, and the intermediate layer 102 is made of a fiber reinforced thermosetting resin (FRP). In addition, the code | symbol 104 in FIG. 2 represents the hollow part.

  Here, the hollow pipe 1a is formed by extruding an ABS resin in an annular shape by an extruder of an inner layer pipe to form an inner layer 101, and an unsaturated polyester resin containing styrene as a crosslinking component in a glass fiber roving on the outer periphery of the inner layer 101. It is impregnated and vertically attached, and its outer periphery is formed into an annular shape to form an uncured intermediate layer 102, which is inserted into a crosshead of an extruder for a coating layer.

  In the extruder for the covering layer 103, the ABS resin is extruded in a ring shape from a die having a protrusion having a predetermined shape, the outer periphery of the intermediate layer 102 is covered, the covering layer 103 is cooled and solidified, and then guided to a heating furnace. The unsaturated polyester resin of the intermediate layer 102 is cured.

The protrusions 11 are formed at predetermined intervals on the outer periphery of the coating layer 103 by contacting the die having the protrusions and the shaping gear that presses the protrusions at a predetermined pitch. As the hollow pipe 1a that can be manufactured as described above, for example, a pipe having an outer diameter of 26 mm, a unit weight of 300 g / m, a bending strength of 550 N, and a bending rigidity of 2060 × 10 ⁷ N · m ² is obtained. The hollow pipe 1 is clearly lighter than the unit weight of 550 to 600 g / m of a metal pipe (agricultural steel coated steel pipe) that is currently marketed as a support for cultivating long bamboo shoots.

  Here, since the ABS resin used for the inner layer 101 and the covering layer 103 and the unsaturated polyester resin having styrene as a crosslinking component used for the intermediate layer 102 are compatible in an uncured state, these three layers are extremely The three layers 101, 102, 103 cooperate with external force to exhibit excellent strength and rigidity.

  The reinforcing fibers used for the intermediate layer 102 are generally glass fibers, but may be other conventional fibers used for FRP, such as carbon fibers, aromatic polyamide fibers, polyester fibers, and vinylon fibers.

  In addition, as the thermosetting resin used for the intermediate layer 102, an unsaturated polyester resin, an epoxy resin, or the like can be adopted, and an unsaturated polyester resin having styrene as a crosslinking component is particularly preferable.

  If the thermoplastic resin used for the inner layer 101 and the covering layer 103 is compatible with the uncured resin employed in the intermediate layer 102, the layers 101 to 103 are mutually connected after the intermediate layer 102 is cured. The hollow pipe 1 having high strength can be obtained by adhesive bonding.

  As examples of combinations of thermoplastic resins and thermosetting resins, styrene resins such as PS resins, ABS resins, AES resins, AS resins, and AAS resins containing styrene as a derivative component, and styrene as a crosslinking monomer And a combination with an unsaturated polyester resin. As another example, there is a combination of an acrylic thermoplastic resin and an unsaturated polyester resin containing an acrylic acid crosslinkable monomer.

  In the present invention, a hollow pipe 1b having a two-layer structure as shown in FIG. 3 can also be employed. That is, it is a two-layer structure hollow pipe comprising a fiber reinforced thermosetting resin layer 102 having the same material structure as the intermediate layer and a covering layer 103 made of a thermoplastic resin formed on the outer periphery of the resin layer 102. The hollow pipe 1b can be manufactured by manufacturing a fiber-reinforced thermosetting resin pipe by conventional drawing plate molding, and then applying an adhesive layer to the outer periphery of the pipe or coating it with an adhesive resin.

  The plug 2 and the spire portion 3 attached to the hollow pipes 1a and 1b may be made of a single resin such as ABS resin that can obtain high strength, and may be manufactured in the illustrated shape by a conventional molding method.

  Hereinafter, the first embodiment (reference numeral 2a) of the stopper provided at the upper end of the support column L according to the present invention will be described in detail with reference to FIGS. 4 is a plan view of the stopper 2a as viewed from above (viewed from the arrow X direction), FIG. 5 is a side view of the stopper 2a as viewed from the side, and FIG. 6 is a downward view of the stopper 2a (as viewed from the arrow Y direction). 7) is a bottom view, FIG. 7 is a longitudinal sectional view taken along line II-II in FIG. 4 of the plug 2a, FIG. 8 is a horizontal sectional view taken along line III-III in FIG. FIG. 6 is a horizontal cross-sectional view of the stopper 2a taken along line IV-IV in FIG. FIG. 10 is a view showing a state in which the linear object 4 is fixed in the lateral groove 232 of the plug 2a in a state where the plug 2a is in a horizontal section.

  In addition, as a linear thing, the load such as a vine loaded on a cultivation net, wind pressure, etc. from an iron wire (number wire), a colored iron wire, a wire rope, a rope-like material twisted with film yarn or monofilament, various strings, etc. May be selected in consideration of the strength to withstand the weather, weather resistance and the like.

  First, the plug 2a is provided with a convex portion 21 having a substantially cylindrical shape that is hollow inside and that is a portion to be fitted into the hollow portion 104 (see FIGS. 2 and 3) of the hollow pipe 1. On the outer peripheral wall of the convex portion 21, a groove 211 and a thread 212 extending in the longitudinal direction are formed at predetermined intervals in the circumferential direction (see FIGS. 5 and 6).

  By forming the groove 211 on the outer peripheral wall of the protrusion 21, when the protrusion 21 is fitted into the hollow portion of the hollow pipe 1, the adhesive is held in the groove 211. Since it exists in the interface of 21 and the hollow pipe 1 reliably, adhesion | attachment of both can be ensured. In addition, the code | symbol 213 of FIG. 6 represents the hollow part of the convex part 21. FIG.

  Next, the stopper 2 a includes a substantially cylindrical head 22 having a larger diameter than the convex portion 21. The head portion 22 is a portion exposed to the outside when the stopper 2 is bonded to the hollow pipe 1.

The head portion 22 is provided with a concave groove 23 that serves to carry the linear object 4. The concave groove 23 is formed in the diameter direction of the stopper 2 and opens on the upper surface 221 and the outer peripheral wall 222 of the stopper 2a. The concave groove 23 is formed so that the mouth width W ₁ (see FIG. 7) gradually increases toward the upper surface 221 of the stopper 2. In other words, the vertical vertical cross-sectional shape (see FIG. 7) of the concave groove 23 is opened in the upper surface 221 so as to form a substantially Y shape, so that the linear object 4 can be easily introduced into the concave groove 23.

In the bottom surface 231 region of the concave groove 23, the mouth width W gradually increases in the circumferential direction in a fan shape as viewed from the center C (see FIG. 4) when viewed from the top toward the outer peripheral wall 222 side. ₂ is formed in the outer peripheral wall 222 of the plug 2 (see in particular FIG. 8).

  The uppermost linear object 4 is inserted from the upper opening 234 of the concave groove 23 of the stopper 2a, and is fixed and accommodated in the lateral groove 232 below. FIG. 10 shows a state in which the linear object 4 is fixed in the lateral groove 232 of the plug 2a in a state where the plug 2a is in a horizontal cross section. The phantom line shown in FIG. 10 represents the upper opening 234 of the upper surface 221 of the stopper 2a.

  In the state as shown in FIG. 10 in which the linear object 4 is only inserted into the concave groove 23, the linear object 4 may come out of the concave groove 23 when pulled upward. In this state, the tension of the linear object 4 may not be sufficient.

  Therefore, when the column L is turned in the direction of the arrow R shown in FIG. 11 (or the opposite direction), the linear object 4 is pulled so as to be fitted into the lateral groove 232 that widens the width of the fan, and is substantially Z-shaped as viewed from above. (See FIG. 11), and as a result, the tension of the linear object 4 is increased.

  In the state shown in FIG. 11, as can be understood with reference to FIG. 12, which is a front view of the periphery of the plug 2 a viewed from the direction of arrow Z in FIG. 11, the linear object 4 is fitted in the lateral groove 232, The tension has been increased. For this reason, even if the linear object 4 is pulled upward, the upper wall 232a (see FIG. 7) of the lateral groove 232 functions as a stopper, so that the linear object 4 does not come out of the concave groove 23.

  Here, FIG. 13 is a view when the juxtaposed struts L are viewed from above, and shows a state in which the linear object 4 is supported by the concave groove 23 of each plug 2a and is stretched linearly. FIG. On the other hand, FIG. 14 exaggeratedly shows a state in which the tension of the linear object 4 is increased by rotating each support column L by a predetermined angle. 13 and 14, the stopper 2a is shown in a horizontal cross-sectional state corresponding to FIG.

  Next, based on FIGS. 15-17, 2nd embodiment (code | symbol 2b) of the stopper provided in the upper end of the support | pillar L which concerns on this invention is described in detail. 15 is a plan view of the plug 2b as viewed from above (viewed from the direction of arrow X in FIG. 16), FIG. 16 is a side view of the plug 2b as viewed from the side, and FIG. It is. Since the form of the bottom view of the stopper 2b is the same as that of the stopper 2a, the description based on the drawings is omitted (see FIG. 6).

  The concave groove 23 of the stopper 2b opens to the stopper upper surface 221 and the stopper outer peripheral wall 222, and protrudes from the opposing vertical wall surfaces 235 and 236 of the concave groove 23 toward the other vertical wall surface. 2351 and 2361 are formed. As shown in FIG. 15, the convex portions 2351 and 2361 are formed at positions that do not face each other, and thus a gap is formed in which the linear object 4 can be easily inserted from above.

  As shown in FIG. 17, the upper surface 2361a of the convex portion 2361 has a tapered shape that widens toward the upper side, and the upper surface 2361a is flush with the inclined surface 234a of the upper opening 234 of the concave groove 23. Is formed. The convex portion 2351 is not described in an enlarged drawing, but has the same configuration as this.

  With this configuration, the linear object 4 is inserted from the upper opening 234 toward the bottom surface 231 of the linear object 4 groove 23 so as to slide on the same inclined surface formed by the inclined surface 234a and the upper surface 2361a. (See arrow Q in FIG. 17). The linear object 4 once fixed to the bottom surface 231 (see FIG. 16) of the concave groove 23 does not easily fall out of the concave groove 23 even when the convex portions 2351 and 2361 are lifted upward. (See FIG. 16).

  Hereinafter, based on FIG. 18, embodiment of the cultivation tool F which concerns on this invention is described. FIG. 18 is a partial front view of the cultivation tool F.

  As for the cultivation tool F, only the required number of support | pillars L are arranged in parallel in a field etc. Specifically, the periphery of the spire portion 3 at the lower end of the support L is inserted into the ground G by a predetermined length, and the support L is erected at a predetermined interval.

  The linear object 4 to which the net 5 is attached is inserted into the concave groove 23 of the plug 2 (2a or 2b) provided at each upper end of the upright pillar L. Then, each support L is turned to stretch the net 5. For example, the net 5 is stretched so that the linear object 4 is fitted into a lateral groove 232 (see FIG. 5) provided in the bottom surface 231 region of the concave groove 23.

In the cultivation tool F formed in this way, since the linear object 4 does not come out of the support L (the concave groove 23), the net 5 is always held in a stretched state. In the present invention, as shown in FIG. 18, after the net 5 is stretched, if the upper end of each support L is continuously connected in the front-rear direction with a twain, a baler string, etc., the swing of the support L is prevented. Although the rigidity is not necessarily higher than that of the steel pipe, even a pillar having a diameter of about 26φ can be used.

  Since the cultivation support according to the present invention is lightweight, its transportation and installation work is easy, and there is no concern about corrosion and it is excellent in durability. Therefore, it can be used as a cultivation column. In particular, since it does not corrode in the soil and it is difficult to attach a lump, it is easy to pull out and does not require scooping or using a machine as in the case of using a conventional steel pipe. Further, since it has sufficient strength and rigidity, there is no fear of breakage during installation work or use. Furthermore, unlike a conventional steel pipe support, it has elasticity (flexibility) and shape recovery.

  Moreover, the cultivation tool which concerns on this invention is easy to stretch a linear thing on the support | pillar upper end part, and this linear thing is hard to drop | omit. In the cultivation tool formed with this support | pillar, since a linear thing and a net | network can always be made into the tension | tensile_strength state, it is especially suitable, for example, when cultivating vine-like crops, such as a long wall.

It is a front view showing the whole structure (partial omission) of the support | pillar for fences (L) which concerns on this invention. FIG. 2 is a horizontal cross-sectional view taken along the line I-I in FIG. FIG. 2 is a horizontal sectional view taken along the line I-I in FIG. It is a top view (viewed from the arrow X direction) of the stopper (2a). It is a side view front view of a stopper (2a). It is a bottom view (viewed from the direction of arrow Y) of the stopper (2a). It is the II-II arrow longitudinal cross-sectional view in FIG. 4 of a stopper (2a). FIG. 6 is a horizontal sectional view taken along the line III-III in FIG. 5 of the stopper (2a). FIG. 6 is a horizontal sectional view taken along line IV-IV in FIG. 5 of the stopper (2a). It is a figure which shows the state which the linear thing (4) fixed to the horizontal groove (232) of the stopper (2a) in the state which made the stopper (2) the horizontal cross section. It is a figure which shows the state which turned the support | pillar (L) and tensioned the linear object (4). It is a front view of the stopper (2) periphery seen from the arrow Z direction of FIG. It is a figure when the support | pillar (L) arranged in parallel is seen from upper direction, and shows the state which the linear thing (4) was carry | supported by the ditch | groove (23) of each stopper (2a), and was spanned linearly. FIG. It is a figure which shows the state which strengthened the tension | tensile_strength of the linear object (4) by rotating each support | pillar (L) arranged in parallel by the predetermined angle. It is a top view (viewed from the arrow X direction of FIG. 16) of the stopper (2b). It is a side view front view of a stopper (2b). It is the P section enlarged view in FIG. It is a partial front view of the cultivation tool (F) which concerns on this invention.

Explanation of symbols

L Prop for cultivation (prop)
DESCRIPTION OF SYMBOLS 1 (1a, 1b) Hollow pipe 2 (2a, 2b) Plug 3 Spire part 4 Linear object 101 Inner layer 102 Intermediate layer 103 Covering layer 221 (In the plug 2) Upper surface 222 (In the plug 2) Outer peripheral wall 23 Concave groove 231 ( Bottom surface 232 (of the groove 23) Horizontal groove 234 Upper opening (of the groove 23) (Y-shaped)
235,236 Longitudinal wall surfaces 2351, 2361 (opposing the concave groove 23) Convex part C Center part F Cultivation tool

Claims (4)

With a hollow pipe,
A stopper attached to the upper opening of the hollow pipe;
A spire portion attached to the lower opening of the hollow pipe,
The hollow pipe has a two-layer structure comprising a fiber reinforced thermosetting resin layer and a coating layer made of a thermoplastic resin formed on the outer periphery of the resin layer, or an inner layer made of a thermoplastic resin and a fiber reinforced thermosetting property. It has a three-layer structure consisting of an intermediate layer made of resin and a coating layer made of a thermoplastic resin, and its bending stiffness is 1220 × 10 ^{7 to} 19600 × 10 ⁷ N · m ² ,
The stopper is provided with a concave groove for carrying a linear object. The concave groove opens on the upper surface of the stopper and the outer peripheral wall of the stopper, and in the bottom area where the linear object is fixed. The cultivation support | pillar in which the horizontal groove which expands a mouth width gradually in upward fan shape is formed toward the outer peripheral wall side from the center part when seeing upward . A hollow pipe,
A stopper attached to the upper opening of the hollow pipe;
A spire portion attached to the lower opening of the hollow pipe,
The hollow pipe has a two-layer structure comprising a fiber reinforced thermosetting resin layer and a coating layer made of a thermoplastic resin formed on the outer periphery of the resin layer, or an inner layer made of a thermoplastic resin and a fiber reinforced thermosetting property. It has a three-layer structure consisting of an intermediate layer made of resin and a coating layer made of thermoplastic resin, and its bending rigidity is 1220 × 10 ⁷ ~ 19600 × 10 ⁷ N ・ m ² And
The stopper is provided with a concave groove for carrying a linear object. The concave groove opens to the upper surface of the stopper and the outer peripheral wall of the stopper, and extends from each of the opposing vertical wall surfaces to the other vertical wall surface. The cultivation support | pillar in which the convex part which protrudes is formed. Opening of the groove is cultivation strut according to claim 1 or 2, characterized in that toward the stopper upper surface is formed so as to gradually mouth width is widened. Is juxtaposed cultivation strut according to any one of claims 1 to 3 cultivation tool, characterized in that the linear material is Ru is stretched between said supporting pillars.

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