JP6823687B2 - Octagonal hollow tube for greenhouse - Google Patents
Octagonal hollow tube for greenhouse Download PDFInfo
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- JP6823687B2 JP6823687B2 JP2019093492A JP2019093492A JP6823687B2 JP 6823687 B2 JP6823687 B2 JP 6823687B2 JP 2019093492 A JP2019093492 A JP 2019093492A JP 2019093492 A JP2019093492 A JP 2019093492A JP 6823687 B2 JP6823687 B2 JP 6823687B2
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- 239000000463 material Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229920006266 Vinyl film Polymers 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Landscapes
- Greenhouses (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Description
本発明は、特殊な断面形状を有する温室用中空管に関するものである。 The present invention relates to a hollow tube for a greenhouse having a special cross-sectional shape.
従来、組み立てて温室にするためのパイプ材料としては、断面円形の中空管が多用されている。
この断面円形の中空管を従来周知の十字接手を用いて縦横十字形に接合すると、縦方向の中空管と横方向の中空管とが、その円形表面同士が交叉して直接接触する接合形態とならざるを得ず、その接触面積が極めて小さい点接触となる。
このため、十字接手の鋼材厚が同一の場合、その緊締強度は縦横の部材の点接触の摩擦力に依拠することとなり、接手の緊締強度を向上しようとしても自ずと限界がある。
Conventionally, a hollow pipe having a circular cross section is often used as a pipe material for assembling into a greenhouse.
When this hollow tube having a circular cross section is joined in a vertical and horizontal cross shape using a conventionally known cross joint, the vertical hollow tube and the horizontal hollow tube cross each other and come into direct contact with each other. There is no choice but to form a joint, and the contact area is extremely small, resulting in point contact.
Therefore, when the steel material thickness of the cross joint is the same, the tightening strength depends on the frictional force of the point contact of the vertical and horizontal members, and there is naturally a limit to improving the tightening strength of the joint.
本発明は、従来の中空管製造設備を利用して安価、簡単に製造可能で、十字等の各種接手の緊締強度が高い温室用中空管を提供することを目的とするものである。 An object of the present invention is to provide a hollow tube for a greenhouse which can be manufactured inexpensively and easily by using a conventional hollow tube manufacturing facility and has a high tightening strength of various joints such as a cross.
また、温室用中空管は通常、２本の中空管を棟部で接合したアーチ部材を棟方向に間隔を置いて必要本数、その両下端部を地面に挿入してあるいはコンクリート製基礎に埋めることによって建て込んで、次いでこれら複数のアーチ部材に水平方向の直線部材を各種接手にて連結して、温室が構築されている。 In addition, the hollow pipes for greenhouses are usually the required number of arch members in which two hollow pipes are joined at the ridge at intervals in the ridge direction, and both lower ends are inserted into the ground or used as a concrete foundation. A greenhouse is constructed by building by burying and then connecting these multiple arch members with horizontal straight members with various joints.
ところで、このアーチ部材は、断面円形の中空直管を両端部を除く中央部分で曲げ加工した２本の中空湾曲管を連結パイプにて連結して製造されている。
そこで、本発明は、中空管の断面形状を多角形としても、曲げ加工を施す湾曲部にて損傷することのない、曲げ加工容易な温室用中空管を提供することをも併せて目的としている。
By the way, this arch member is manufactured by connecting two hollow curved pipes obtained by bending a hollow straight pipe having a circular cross section at a central portion excluding both ends with a connecting pipe.
Therefore, it is also an object of the present invention to provide a hollow tube for greenhouses which is easy to bend and is not damaged by the curved portion to be bent even if the cross-sectional shape of the hollow tube is polygonal. It is said.
本発明の主な構成は次のとおりである。
１．中空直管、湾曲部を備えた中空湾曲管と連結パイプを用いた植物栽培施設用の骨組み材であって、
中空直管と、中空湾曲管と、連結パイプは、正八角形断面である八角形中空管材であり、
中空湾曲管は、曲げ加工が施された湾曲部を有しており、
連結パイプは、中空湾曲管が内接する中空八角形であり、
一対の中空湾曲管を棟部で連結パイプに挿入してアーチ部材が形成され、
正八角形断面である八角形中空管材は、交差する部分で互いに平坦部同士が相対して接触する面接触であることを、特徴とする植物栽培用施設の骨組み材。
２．棟方向部材である直線状の中空直管と、棟部となる上端部において一対の中空湾曲管が軸方向に接合されたアーチ部材とアーチ部材を棟方向に多数建て込んで骨組みを構成した植物栽培用施設であって、
中空直管、中空湾曲管と連結パイプは、正八角形断面である八角形中空管材であり、連結パイプは、中空湾曲管が内接する中空八角形であり、
一対の中空湾曲管を棟部で連結パイプに挿入してアーチ部材が形成されていることを、
特徴とする植物栽培用施設。
３．アーチ部材の外面と内面が平坦面に設置されることを特徴とする２．記載の植物栽培用施設。
４．平坦な底面である鳩尾状溝を有するフィルム受け部材を中空湾曲管の平坦な外面に取り付けたことを特徴とする３．記載の植物栽培用施設。
The main configurations of the present invention are as follows.
1. 1. Hollow straight tube, a framework material for plant cultivation facility using a hollow bent tube and communicating Yuipa type having a curved portion,
A hollow straight tube, a hollow curved pipe, connecting pipes are octagonal hollow tubing is regular octagonal cross-section,
The hollow curved pipe has a curved portion that has been bent.
The connecting pipe is a hollow octagon inscribed by a hollow curved pipe.
A pair of hollow curved pipes are inserted into the connecting pipe at the ridge to form an arch member .
Is a regular octagonal cross-section octagonal hollow tube material, the surface contact der Rukoto the flat portions mutually contacting relative in the intersection, the scaffold material of the facility for plant cultivation characterized.
2. 2. A plant that forms a framework by building a large number of arch members and arch members in which a straight hollow straight pipe that is a ridge direction member and a pair of hollow curved pipes are axially joined at the upper end of the ridge. It ’s a cultivation facility,
Hollow straight tube, hollow bent tube and communicating Yuipa type is octagonal hollow tubing is regular octagon cross-section, the connecting pipe is a hollow octagonal hollow curved tube inscribed,
The fact that the arch member is formed by inserting a pair of hollow curved pipes into the connecting pipe at the ridge.
A characteristic plant cultivation facility.
3. 3. 2. The outer surface and the inner surface of the arch member are installed on a flat surface. The listed plant cultivation facility.
4. 3. A film receiving member having a dovetail groove having a flat bottom surface is attached to the flat outer surface of the hollow curved tube. The listed plant cultivation facility.
請求項１に係る発明によれば、断面円形の中空管であった従来の温室用中空管を、断面八角形とする簡単な構成で、従来の中空管製造設備を利用して安価、簡単に製造可能で、十字等の各種接手の緊締強度が高く、曲げ加工が施された湾曲部における損傷の少ない温室用中空管を提供することができる。
請求項２に係る発明によれば、各種接手の緊締強度をさらに高くすることができる。
According to the invention of claim 1, the conventional hollow tube for a greenhouse, which was a hollow tube having a circular cross section, has a simple structure having an octagonal cross section, and is inexpensive by using a conventional hollow tube manufacturing facility. It is possible to provide a hollow tube for a greenhouse which can be easily manufactured, has a high tightening strength of various joints such as a cross section, and has little damage in a bent portion.
According to the invention of claim 2, the tightening strength of various joints can be further increased.
図１に本発明に係る八角形の空管の断面形状を示す。
多角形パイプ同士を十字形を初めとする接合をする際に、パイプ同士の接触面積を大きくするためには、それぞれの断面が四角形、六角形、八角形、十二角形、十六角形のものが考えられるが、このうち断面四角形は、最も接触面積が大きく緊締強度を高くすることができる半面、湾曲加工時に損傷しやすく安定した中空湾曲管の製造が困難である。
FIG. 1 shows the cross-sectional shape of the octagonal empty tube according to the present invention.
When joining polygonal pipes such as a cross, in order to increase the contact area between the pipes, each cross section is quadrangular, hexagonal, octagonal, dodecagonal, or hexagonal. Of these, the quadrangular cross section has the largest contact area and can increase the tightening strength, but on the other hand, it is easily damaged during bending and it is difficult to manufacture a stable hollow curved pipe.
また、断面六角形のものは十字接合をする際に、図６に示すように、上側の一方の管１と下側の他方の管２は平坦部同士が面接触するものの、一方の管１と十字接手３の断面門形の巻回部３１内面との接触面の数は３、十字接手３の両側に形成された六角中空管に対応する受け部３２の辺縁とそこに挿通された他方の管２との接触部の数は表裏夫々２となる。
これは、一方の管１の下面は十字接手３の受け部３２の上縁３２１より下側に位置して、両者は接触しないためである。
Further, as shown in FIG. 6, when the hexagonal cross section is cross-joined, the flat portions of the upper one pipe 1 and the lower other pipe 2 are in surface contact with each other, but one pipe 1 is formed. The number of contact surfaces between the cross section and the inner surface of the gate-shaped winding portion 31 of the cross joint 3 is 3, and the edge of the receiving portion 32 corresponding to the hexagonal hollow tube formed on both sides of the cross joint 3 and inserted therethrough. The number of contact portions with the other pipe 2 is 2 on each side.
This is because the lower surface of one of the pipes 1 is located below the upper edge 321 of the receiving portion 32 of the cross joint 3, and the two do not come into contact with each other.
このため、断面六角形の中空管を十字接合をすると、管同士の接触面を大きく確保できる一方、十字接手が中空管を拘束する十字接手自体の中空管拘束力が縮減する。
これに対応するためには、十字接手の鋼材厚みを厚くする必要が生じ、製作コストが嵩むこととなる問題が生じる。
さらに、断面十二角形のものは、断面六角形の中空管に比べ中空管同士の接触面積が想到限定的となり、採用しづらい。
Therefore, when the hollow pipes having a hexagonal cross section are cross-joined, a large contact surface between the pipes can be secured, but the hollow pipe restraining force of the cross joint itself that restrains the hollow pipe is reduced.
In order to cope with this, it is necessary to increase the thickness of the steel material of the cross joint, which causes a problem that the manufacturing cost increases.
Further, the dodecagonal cross section is difficult to adopt because the contact area between the hollow pipes is extremely limited as compared with the hollow pipe having a hexagonal cross section.
これに対し、断面八角形の中空管同士を十字接手する場合は、図２に示されるように、管同士の接触面を適度に大きく確保できるとともに、一方の管１と十字接手３の断面門形の巻回部３１内面との接触面の数は５、とりわけ中空管1の垂直面が拘束され、また、十字接手３の両側に形成された八角中空管２に対応する受け部３２の辺縁とそこに挿通された中空直管２との接触部の数は表裏夫々４となる。
すなわち、中空管同士１、２の接触面積、十字接手３自体の中空管拘束力がバランスよく確保される。
よって、本発明は断面八角形の中空管を採用することとした。
On the other hand, when the hollow pipes having an octagonal cross section are cross-joined to each other, as shown in FIG. 2, the contact surface between the pipes can be secured to be appropriately large, and the cross section of one of the pipes 1 and the cross-section 3 is obtained. The number of contact surfaces with the inner surface of the gate-shaped winding portion 31 is 5, in particular, the vertical surface of the hollow tube 1 is constrained, and the receiving portion corresponding to the octagonal hollow tube 2 formed on both sides of the cross joint 3. The number of contact portions between the edge of 32 and the hollow straight pipe 2 inserted therein is 4 on each side.
That is, the contact areas of the hollow tubes 1 and 2 and the hollow tube restraining force of the cross joint 3 itself are secured in a well-balanced manner.
Therefore, the present invention has decided to adopt a hollow tube having an octagonal cross section.
この温室用中空管は、温室の棟方向部材である、長さ方向全体に亘って直線状の断面八角形の中空直管と、軒部と屋根部が直線状で中間部が円弧状に湾曲した断面八角形の中空湾曲管との組み合わせから構成されている。 This hollow pipe for greenhouses is a hollow straight pipe with an octagonal cross section that is straight over the entire length direction, which is a member in the direction of the greenhouse, and the eaves and roof are straight and the middle part is arcuate. It is composed of a combination with a hollow curved tube having an octagonal cross section.
そして、一対の中空湾曲管は、互いの湾曲部が凸状態、温室の棟部となる上端部において軸方向に接合され、図５に示されるように、略馬蹄形のアーチ部材４とされるものである。
このアーチ部材４の外面１２と内面１１、すなわち中空湾曲管の湾曲部の最も外側に位置する湾曲外面と最も内側に位置する湾曲内面が平坦面とされ、決して角部が上記した湾曲外面や湾曲内面に存在することはない。
この構成によって、棟方向に間隔を置いて建て込まれる多数のアーチ部材４を構成する中空湾曲管１と、棟方向に配設される中空直管２との接合部は、それぞれの管の平坦部同士が対向して直接接触することとなり、大きな接触面積が確保されるものである。
The pair of hollow curved pipes are formed into a substantially horseshoe-shaped arch member 4 as shown in FIG. 5 by being axially joined at the upper end portion of the greenhouse where the curved portions are convex. Is.
The outer surface 12 and inner surface 11 of the arch member 4, that is, the curved outer surface located on the outermost side and the curved inner surface located on the innermost side of the curved portion of the hollow curved pipe are flat surfaces, and the corner portions are never the curved outer surface or curved portion described above. It does not exist on the inside.
With this configuration, the joints between the hollow curved pipe 1 constituting a large number of arch members 4 built at intervals in the ridge direction and the hollow straight pipe 2 arranged in the ridge direction are flat. The parts face each other and come into direct contact with each other, so that a large contact area is secured.
図２にアーチ部材の構成部材である中空湾曲管１と中空直管２の十字接手３の接手構造を示す。
図２左は、十字接手構造を温室妻面からみた正面図で、同図右は、その側面図である。
FIG. 2 shows the joint structure of the hollow curved pipe 1 and the cross joint 3 of the hollow straight pipe 2, which are constituent members of the arch member.
The left side of FIG. 2 is a front view of the cross joint structure as viewed from the greenhouse wife side, and the right side of the figure is a side view thereof.
この十字接手３は、中空丸管用の従来周知の十字接手を八角中空管用に変更したもので、中空湾曲管１に十字接手３の断面門形の巻回部３１を当て、該十字接手３の両側に形成された八角中空管に対応する受け部３２に中空直管２を入れ、この十字接手の下部に形成された係合片３３に楔部材３４を打ち込むことによって中空直管２を上記中空湾曲管１に緊締するようにした。 This cross joint 3 is a modification of a conventionally known cross joint for a hollow round pipe for an octagonal hollow pipe. The hollow straight pipe 2 is inserted into the receiving portions 32 corresponding to the octagonal hollow pipes formed on both sides, and the wedge member 34 is driven into the engaging piece 33 formed under the cross joint to form the hollow straight pipe 2. The hollow curved pipe 1 was tightened.
これら図面をみて明らかなように、本発明に係るそれぞれの八角形中空管は、互いにその平坦部同士が相対して接触している。
このため、本発明の温室用中空管は、従来の中空丸管同士が接合されたときの点接触の接触面積に比し、格段に広い接触面積を確保できるので、強固な緊締強度を得ている。
As is clear from these drawings, the flat portions of the octagonal hollow tubes according to the present invention are in contact with each other.
Therefore, the hollow tube for greenhouses of the present invention can secure a much wider contact area than the contact area of point contact when the conventional hollow round pipes are joined to each other, so that a strong tightening strength can be obtained. ing.
図３に示した十字接手３は、図５に示される温室の中空湾曲管１が軸方向に連結パイプ４１にて接合されたアーチ部材４の屋根部、軒部、裾部等の直線部分と中空直管２の交叉部において緊締金具として用いられる。 The cross joint 3 shown in FIG. 3 is a straight portion such as a roof portion, an eave portion, and a hem portion of an arch member 4 in which the hollow curved pipe 1 of the greenhouse shown in FIG. 5 is joined by a connecting pipe 41 in the axial direction. It is used as a tightening metal fitting at the crossing portion of the hollow straight pipe 2.
図３に示す十字接手は、温室の棟部における十字接手３である。
４１は断面八角形の中空湾曲管１の上端部同士をその両端部に挿入して、両者を軸方向に連結して全体としてアーチ状のアーチ部材４とする連結パイプである。
この連結パイプ４１は、八角形の中空湾曲管１が両端部に挿入されるものであるから、当然にその断面形状は全長に亘って中空八角形とされている。
The cross joint shown in FIG. 3 is the cross joint 3 in the ridge of the greenhouse.
Reference numeral 41 denotes a connecting pipe in which the upper ends of the hollow curved pipe 1 having an octagonal cross section are inserted into both ends thereof, and the two are connected in the axial direction to form an arch-shaped arch member 4 as a whole.
Since the octagonal hollow curved pipe 1 is inserted into both ends of the connecting pipe 41, the cross-sectional shape of the connecting pipe 41 is naturally hollow octagon over the entire length.
また、この連結パイプ４１の中央部４２は、連結パイプ４１と中空直管２及び連結パイプ４１と十字接手３のそれぞれの接触面積を大きくするために、水平方向に直線形としてある。
これにより、連結パイプ４１の下面と中空直管２の上面のそれぞれの平坦部同士が対向するとともに、連結パイプ４１の上面と十字接手３の内面のそれぞれの平坦部同士が対向し、十字接手３によって緊締される際に三者が直接面接触して、棟部における交叉部の緊締強度も他の十字接手部と同様に強化されている。
Further, the central portion 42 of the connecting pipe 41 is linear in the horizontal direction in order to increase the contact area between the connecting pipe 41 and the hollow straight pipe 2 and the connecting pipe 41 and the cross joint 3.
As a result, the flat portions of the lower surface of the connecting pipe 41 and the upper surface of the hollow straight pipe 2 face each other, and the flat portions of the upper surface of the connecting pipe 41 and the inner surface of the cross joint 3 face each other. When tightened by the three parties, the three parties come into direct contact with each other, and the tightening strength of the cross section in the ridge is strengthened in the same way as the other cross joints.
一方、温室においては、骨組み表面にビニールフィルム等の合成樹脂製被覆材を被覆することが多く行われている。
図４に、断面八角形のアーチ部材４に、上記合成樹脂製被覆材を被覆するための鳩尾状溝を有するフイルム受け部材５を固定する、フイルム受け部材固定装置６を示す。
On the other hand, in greenhouses, the surface of the frame is often coated with a coating material made of synthetic resin such as a vinyl film.
FIG. 4 shows a film receiving member fixing device 6 for fixing a film receiving member 5 having a dovetail groove for coating the synthetic resin covering material to the arch member 4 having an octagonal cross section.
このフイルム受け部材固定装置６は、中空湾曲管１を受け入れる断面倒コ字形の巻回部６１と、中空湾曲管１をフイルム受け部材５底面に押し付ける楔６２とから構成されている。
また、上端部にはフイルム受け部材５を受け入れその斜め外壁を係止する係止部を備え、楔６２と協同してフイルム受け部材５と中空湾曲管１を圧接するものである。
The film receiving member fixing device 6 is composed of a winding portion 61 having an inverted U-shaped cross section that receives the hollow curved tube 1, and a wedge 62 that presses the hollow curved tube 1 against the bottom surface of the film receiving member 5.
Further, the upper end portion is provided with a locking portion that receives the film receiving member 5 and locks the diagonal outer wall thereof, and press-contacts the film receiving member 5 and the hollow curved pipe 1 in cooperation with the wedge 62.
フイルム受け部材５の底面は平坦部とされているため、中空湾曲管１の湾曲外面１１の平坦部と直接接触して圧接され強力な緊締力を確保している。
このように、中空湾曲管１と中空直管２は断面八角形の中空管とされ、その上フイルム受け部材５の溝形状が鳩尾状であるため、十字接手３あるいはフイルム受け部材固定装置６の緊締力は、平坦面同士が接触して緊締されることから、広い面積での面接触が得られ、強い緊締力が確保されるものである。
特に、本発明の断面八角形の中空管同士の十字接手は、断面円形の中空管同士のそれの緊締力に比べ、上記したように格段に強化されていることが理解されよう。
Since the bottom surface of the film receiving member 5 is a flat portion, it is in direct contact with the flat portion of the curved outer surface 11 of the hollow curved pipe 1 and is pressure-welded to ensure a strong tightening force.
As described above, the hollow curved pipe 1 and the hollow straight pipe 2 are hollow pipes having an octagonal cross section, and the groove shape of the film receiving member 5 is dovetail-shaped. Therefore, the cross joint 3 or the film receiving member fixing device 6 Since the flat surfaces are brought into contact with each other to be tightened, surface contact over a wide area can be obtained and a strong tightening force is ensured.
In particular, it can be understood that the cross joint between the hollow pipes having an octagonal cross section of the present invention is remarkably strengthened as described above, as compared with the tightening force of the hollow pipes having a circular cross section.
また、中空湾曲管１と中空直管２の全表面あるいは接合部位を梨地加工等することにより、表面に粗面を形成して摩擦係数を増大しておけば、さらに断面八角形の中空管同士の十字接手の緊締力はさらに増大される。 Further, if the entire surface or the joint portion of the hollow curved pipe 1 and the hollow straight pipe 2 is satin-finished to form a rough surface on the surface and the friction coefficient is increased, the hollow pipe having an octagonal cross section is further formed. The tightening force of the cross joints between each other is further increased.
１ 中空湾曲管
１１ 管内面
１２ 管外面
２ 中空直管
３ 十字接手
４ アーチ部材
４１ 連結パイプ
４２ 直線部
５ フイルム受け部材
６ フイルム受け部材固定装置
1 Hollow curved pipe 11 Inner surface of pipe 12 Outer surface of pipe 2 Hollow straight pipe 3 Cross joint 4 Arch member 41 Connecting pipe 42 Straight part 5 Film receiving member 6 Film receiving member fixing device
Claims (4)
中空直管と、中空湾曲管と、連結パイプは、正八角形断面である八角形中空管材であり、
中空湾曲管は、曲げ加工が施された湾曲部を有しており、
連結パイプは、中空湾曲管が内接する中空八角形であり、
一対の中空湾曲管を棟部で連結パイプに挿入してアーチ部材が形成され、
正八角形断面である八角形中空管材は、交差する部分で互いに平坦部同士が相対して接触する面接触であることを、
特徴とする植物栽培用施設の骨組み材。 Hollow straight tube, a framework material for plant cultivation facility using a hollow bent tube and communicating Yuipa type having a curved portion,
A hollow straight tube, a hollow curved pipe, connecting pipes are octagonal hollow tubing is regular octagonal cross-section,
The hollow curved pipe has a curved portion that has been bent.
The connecting pipe is a hollow octagon inscribed by a hollow curved pipe.
A pair of hollow curved pipes are inserted into the connecting pipe at the ridge to form an arch member .
It is a regular octagonal cross-section octagonal hollow tube material, the surface contact der Rukoto the flat portions to each other at the intersection is in contact with the relative,
The skeleton material of the characteristic plant cultivation facility.
中空直管、中空湾曲管と連結パイプは、正八角形断面である八角形中空管材であり、
連結パイプは、中空湾曲管が内接する中空八角形であり、
一対の中空湾曲管を棟部で連結パイプに挿入してアーチ部材が形成されていることを、
特徴とする植物栽培用施設。 A plant that forms a framework by building a large number of arch members and arch members in which a straight hollow straight pipe that is a ridge direction member and a pair of hollow curved pipes are axially joined at the upper end of the ridge. It ’s a cultivation facility,
Hollow straight tube, hollow bent tube and communicating Yuipa type is octagonal hollow tubing is regular octagonal cross-section,
The connecting pipe is a hollow octagon inscribed by a hollow curved pipe.
The fact that the arch member is formed by inserting a pair of hollow curved pipes into the connecting pipe at the ridge.
A characteristic plant cultivation facility.
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