US20190136571A1 - Polytunnel structure - Google Patents

Polytunnel structure Download PDF

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Publication number
US20190136571A1
US20190136571A1 US16/093,530 US201716093530A US2019136571A1 US 20190136571 A1 US20190136571 A1 US 20190136571A1 US 201716093530 A US201716093530 A US 201716093530A US 2019136571 A1 US2019136571 A1 US 2019136571A1
Authority
US
United States
Prior art keywords
cover support
leg
support member
support members
sectional shape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/093,530
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English (en)
Inventor
Rolly WHATTON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haygrove Ltd
Original Assignee
Haygrove Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Haygrove Ltd filed Critical Haygrove Ltd
Assigned to HAYGROVE LIMITED reassignment HAYGROVE LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WHATTON, Rolly
Publication of US20190136571A1 publication Critical patent/US20190136571A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00—Protection of plants
    • A01G13/20—Protective coverings for plants
    • A01G13/24—Tunnels for covering rows of plants
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H15/00—Tents or canopies, in general
    • E04H15/18—Tents having plural sectional covers, e.g. pavilions, vaulted tents, marquees, circus tents; Plural tents, e.g. modular
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00—Protection of plants
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00—Protection of plants
    • A01G13/20—Protective coverings for plants
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14—Greenhouses
    • A01G9/1407—Greenhouses of flexible synthetic material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H15/00—Tents or canopies, in general
    • E04H15/32—Parts, components, construction details, accessories, interior equipment, specially adapted for tents, e.g. guy-line equipment, skirts, thresholds
    • E04H15/34—Supporting means, e.g. frames
    • E04H15/36—Supporting means, e.g. frames arch-shaped type
    • E04H15/40—Supporting means, e.g. frames arch-shaped type flexible
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14—Greenhouses
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14—Greenhouses
    • A01G9/16—Dismountable or portable greenhouses ; Greenhouses with sliding roofs
    • 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

Definitions

  • This invention relates to a polytunnel structure, for example for use in aiding controlling the environmental conditions in which crops are grown, enhancing or optimising the growing conditions to enhance crop production, reduce insect damage and the like.
  • the invention may also be employed in other applications.
  • One form of polytunnel structure in common use comprises a series of rows of upstanding legs, each of which is anchored to an underlying ground surface in a substantially vertical orientation.
  • a series of cover support members are provided, each cover support member being supported, at one end, by one of the legs of one of the rows, and at its opposite end by a corresponding leg of an adjacent one of the rows.
  • a cover for example in the form of a flexible plastics material sheet, a net, a mesh or the like, extends over the cover support members and is anchored in position using ropes, straps or the like that extend over the cover and that are anchored, directly or indirectly, to the ground.
  • the cover support members are typically of arcuate form, supporting the cover in such a manner that the cover adopts a substantially barrel-roof like profile. It will be appreciated, however, that this need not always be the case and the cover support members may be shaped such that the cover takes on a different shape if desired.
  • the cover support members typically take the form of lengths of a suitable steel material tube of circular cross-sectional shape, the tube having been bent to take on the desired arcuate form.
  • the upper end of each leg is typically of bifurcated form, defining a pair of angled, upwardly extending projections of diameter slightly smaller than the inner diameter of the tube of the cover support members such that the end parts of the cover support members can receive the projections so that the cover support members are supported by the legs in a desired orientation.
  • the loadings borne by the cover support members and legs in supporting the cover and in withstanding loads applied to the cover can be significant, and the cover support members and legs are designed in such a manner that they are able to withstand these loads.
  • the cover support members are typically formed from relatively thick walled tubes.
  • relatively thick walled tubes is disadvantageous in that it results in the loads having to be borne by the legs being increased, and in that the cover support members are of relatively costly form.
  • a polytunnel structure comprising a plurality of rows of leg members, and a plurality of cover support members, each cover support member being supported at one end by a leg of one of the rows, and at its opposite end by a corresponding leg of an adjacent one of the rows, wherein at least one of the cover support members is of tubular form of non-circular cross-sectional shape having a major axis and a minor axis, wherein, in use, the minor axis extends generally parallel to a ground surface upon which the polytunnel structure is used, and the major axis extends perpendicularly to the minor axis.
  • the major axis thus extends in a vertical direction or in a direction having a vertical component.
  • cover support members of such a structure In use, the loads experienced by the cover support members of such a structure are predominantly in directions having a vertical component.
  • cover support members of non-circular cross-sectional shape orientated as set out hereinbefore cover support members of thinner wall thickness may be used without negatively impacting upon the load bearing capacity thereof in the directions in which most loads are experienced. Accordingly, weight and material cost savings can be made.
  • cover support members could be of a range of cross-sectional shapes, for example they could be of elliptical shape or of rectangular shape, it is preferred for the cover support members to have a cross-sectional shape in the form of a pair of part circular regions spaced apart from one another by substantially straight sides.
  • the invention in addition to achieving a reduction in weight without negatively impacting the load bearing capacity of the cover support members, relatively simple clips or clamps may be used to achieve this.
  • the use of the non-circular cross-section material for the cover support members means that rotation of the clips of clamps relative thereto can be avoided without needing excessively high clamping loads to be used. The risk of damage to the cover support member through the application of such clamping loads is thus reduced.
  • each leg includes a projection of non-circular cross-sectional shape arranged to receive or be received by the end part of the associated support member.
  • the invention further relates to cover support members, legs, clamps and clips suitable for use in such a structure.
  • FIG. 1 is a diagrammatic view illustrating a polytunnel structure in accordance with one embodiment of the invention
  • FIG. 2 is a view, to an enlarged scale, illustrating part of the polytunnel structure of the embodiment of FIG. 1 ;
  • FIGS. 3 a and 3 b are views illustrating part of the polytunnel structure in greater detail
  • FIGS. 4 a and 4 b illustrate two clip or clamp designs suitable for use with the polytunnel structure of FIG. 1 ;
  • FIG. 5 illustrates the application of the invention to another style of polytunnel structure
  • FIGS. 6 a and 6 b are views illustrating part of the structure of FIG. 5 .
  • a polytunnel structure 10 that comprises a plurality of rows 10 of upstanding legs 12 , each leg 12 being screwed or otherwise secured to the ground in a location in which a polytunnel structure 10 is desired, the legs 12 each extending generally vertically.
  • Each leg 12 includes an upright 14 and a bifurcated support region 16 defining arms or projections 18 that are angled to the upright 14 .
  • the projections 18 are of non-circular cross-sectional shape, in the arrangement shown being of a hollow tubular form. It will be appreciated, however, that the projections 18 could be of solid construction, if desired, and may be of other shapes than illustrated.
  • each projection 18 conveniently takes the form of a pair of part circular regions 18 a , 18 b interconnected by straight regions 18 c , 18 d.
  • the structure 10 further comprises a series of cover support members 20 .
  • Each cover support member 20 is of arcuate form, being constructed from a tubular steel or the like material that is bent to take on the desired arcuate form.
  • Each support member 20 is supported, at one end thereof, by one of the legs 12 of one of the rows 10 , and at the opposite end thereof by a corresponding leg 12 of an adjacent one of the rows 10 .
  • the end parts of the cover support members 20 are supported by the leg members 12 by being slid over respective ones of the projections 18 . Alternatively, they could be designed to be received by the leg members 12 .
  • each cover support member 20 takes the form of a length of a tubular steel or the like material that is bent or otherwise formed to take on the desired arcuate form.
  • the tubular material is of non-circular cross-sectional shape, defining a major axis 22 and a minor axis 24 , the material being of substantially the same cross-sectional shape as the projections 18 , but of slightly larger dimensions so as to allow the introduction of the projections 18 into the ends of the support members 20 .
  • the cross-sectional shape of each cover support member 20 thus conveniently takes the form of a pair of part circular regions 20 a , 20 b interconnected by straight regions 20 c , 20 d.
  • the orientation of the cover support members 20 is such that, throughout the length of each cover support member, the minor axis 24 extends generally horizontally, substantially parallel to the ground surface upon which the polytunnel structure 10 is constructed.
  • the major axis 22 extends perpendicularly to the minor axis 24 .
  • the arcuate form of the cover support members 20 results in the orientation of the major axis 22 varying along the length of the cover support member. Despite this variation in orientation, throughout the length of the cover support member 20 the major axis 22 extends either vertically or in directions having a vertical component.
  • the cover support members 20 together carry a cover 26 , for example of flexible plastics material sheet, net, mesh or the like, the arcuate shaping of the cover support members 20 resulting in the cover 26 adopting a barrel-roof like form.
  • Ropes, straps or the like extend over the cover and are anchored to the ground or to the legs 12 to secure the cover 26 in position.
  • the cross-sectional shape of the cover support members 20 is such that the cover support members 20 are better able to withstand loads applied, for example, to the curved faces 20 a , 20 b thereof than to loads applied to the flat faces 20 c , 20 d thereof. Consequently, the cover support members 20 can bear significant loads arising from side winds incident upon the cover 26 . These loadings can be borne even if the cover support members 20 are of thinner walled form than is normally the case.
  • the use of non-circular cross-section cover support members 20 thus enables weight savings and material cost savings to be made whilst maintaining a desired load bearing capacity, or enables an increased load bearing capacity to be achieved without increasing the weight of the cover support members 20 .
  • the projections 18 By designing the projections 18 so as to have substantially the same cross-sectional shape as the cover support members 20 , it will be appreciated that upon assembly the cover support members 20 will automatically adopt an orientation in which they extend perpendicularly to the rows 10 of legs 12 . Assembly of the polytunnel structure may thus be simplified.
  • cover support members 20 and projections 18 are substantially non-rotatably fitted to one another, the relative rotation therebetween that often occurs with traditional polytunnel structures having cover support members of circular cross-sectional shape as a result of the tendency of the cover support members to rotate and sag under their own weight is resisted.
  • the polytunnel structure is thus of enhanced structural rigidity.
  • clamps or clips 28 , 30 may be used that are specifically designed for use with cover support members 20 of non-circular cross-sectional shape, the cooperation between the clamps or clips 28 , 30 and the cover support members 20 being such that angular movement therebetween is resisted even when the clamping load applied between the clamps or clips 28 , 30 and the cover support members 20 is relatively small. Accordingly, fittings may be non-rotatably fixed to the cover support members 20 without requiring the application of excessively large clamping loads that could result in damage to the cover support members 20 .
  • a series of polytunnel structures may be erected side-by-side, certain of the legs 12 supporting ends of the cover support members 20 of two adjacent ones of the tunnel structures.
  • the invention is not restricted to such use and may be employed with a standalone tunnel structure, for example as shown in FIG. 5 .
  • Such structures are often used in climates in which significant snow loadings may be experienced, and so the use of cover support members 20 of non-circular cross-sectional shape, arranged to enhance the ability of the tunnel structure to withstand loadings applied to the cover, such as by the presence of snow thereon or due to strong side winds or the like, is beneficial.
  • each leg 12 of such an arrangement preferably includes a lower part 12 a of circular cross-sectional shape arranged to be driven into the ground, the lower part 12 a carrying a screw formation 12 b .
  • the leg 12 further comprises an upper part 12 c of non-circular cross-sectional shape arranged to be received within an end part of the associated cover support member 20 .
  • a flange 12 d with which a tool can be engaged to allow the leg 12 to be driven for rotation to drive the leg 12 into the ground, that serves to provide a guide to show when the leg 12 has been driven into the ground by a suitable distance, and to carry hooks 12 e whereby ropes or the like used to secure the cover in position may be anchored.
  • the positions of the hooks 12 e may be chosen in such a fashion as to enable control over the spacing of parts of the ropes or the like from the axes of the legs 12 , for example to allow movement of a roller vent tube when parts of the tunnel structure are vented.

Landscapes

  • Environmental Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Tents Or Canopies (AREA)
  • Greenhouses (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Fencing (AREA)
  • Protection Of Plants (AREA)
  • Road Signs Or Road Markings (AREA)
  • Details Of Indoor Wiring (AREA)
US16/093,530 2016-04-14 2017-04-06 Polytunnel structure Abandoned US20190136571A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB201606567A GB2549469B (en) 2016-04-14 2016-04-14 Polytunnel structure
GB1606567.4 2016-04-14
PCT/GB2017/050966 WO2017178797A1 (fr) 2016-04-14 2017-04-06 Structure de tunnel plastique

Publications (1)

Publication Number Publication Date
US20190136571A1 true US20190136571A1 (en) 2019-05-09

Family

ID=58737682

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/093,530 Abandoned US20190136571A1 (en) 2016-04-14 2017-04-06 Polytunnel structure

Country Status (14)

Country Link
US (1) US20190136571A1 (fr)
EP (1) EP3442322A1 (fr)
CN (1) CN109152338A (fr)
AU (1) AU2017248710A1 (fr)
CA (1) CA3020712A1 (fr)
CL (1) CL2018002917A1 (fr)
CO (1) CO2018012142A2 (fr)
EA (1) EA201892130A1 (fr)
GB (1) GB2549469B (fr)
MA (1) MA44667A (fr)
MX (1) MX2018012528A (fr)
PE (1) PE20190097A1 (fr)
WO (1) WO2017178797A1 (fr)
ZA (1) ZA201807587B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240423140A1 (en) * 2021-01-27 2024-12-26 Haygrove Limited Tunnel structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2549469B (en) 2016-04-14 2019-12-25 Haygrove Ltd Polytunnel structure

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013109B (de) * 1956-08-13 1957-08-01 Theodor Terlinden Gewaechshaus
US4117636A (en) * 1976-10-13 1978-10-03 X. S. Smith, Inc. Plastic covered gutter connected greenhouse building structure
FR2386760A1 (fr) * 1977-04-07 1978-11-03 Richel Pierre Formage d'elements tubulaires fonctionnels pour la fabrication de serres tunnels et similaires
FR2388486A1 (fr) * 1977-04-29 1978-11-24 Baudouin Gerard Elements de charpente pour serre-tunnel
US4837990A (en) * 1986-06-24 1989-06-13 Alexander Peleg Sheltering structures and a method of assembling same
WO1991007081A1 (fr) * 1989-11-09 1991-05-30 Filclair S.A. Support multifonctions pour charpente de serre
US5197238A (en) * 1989-06-15 1993-03-30 Alexander Peleg Enclosed structures
US5655335A (en) * 1995-07-07 1997-08-12 Vermeer; Arthur Anthony Greenhouse structures and roof structures therefor
GB2407105A (en) * 2003-10-14 2005-04-20 Haygrove Ltd Gutter comprising flexible member
WO2017032979A1 (fr) * 2015-08-21 2017-03-02 Haygrove Limited Agencement de serre-tunnel

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US3165110A (en) * 1961-08-11 1965-01-12 Thomas W Brooks Building construction
FR2701519B1 (fr) * 1993-02-11 1995-03-31 Pierre Richel Dispositif d'assemblage d'éléments tubulaires.
JP3290308B2 (ja) * 1994-07-27 2002-06-10 積水樹脂株式会社 作物栽培用トンネル支柱
CN2375093Y (zh) * 1999-03-26 2000-04-26 张纪勋 多功能塑料骨架板
DE20120814U1 (de) * 2001-12-21 2002-04-18 Agrarprodukte Hartmann GmbH & Co. KG, 68623 Lampertheim Foliengewächshaus
GB0300253D0 (en) * 2003-01-07 2003-02-05 Haygrove Ltd Polytunnel system
KR20080018882A (ko) * 2005-06-07 2008-02-28 우베-니토 카세이 가부시키가이샤 터널재배용 프레임 및 그 제조방법
FR2957751B1 (fr) * 2010-03-23 2012-11-16 Olivier Roor Serre a tunnel pour plants de vegetaux et notamment plants de tomates
DE102011001917A1 (de) * 2011-04-08 2012-10-11 BAM Bundesanstalt für Materialforschung und -prüfung Funktionale Folientunnel, insbesondere sich selbst aufrichtende Strukturen und Verfahren der Programmierung
KR20140121162A (ko) * 2013-04-05 2014-10-15 이택연 비닐하우스 프레임에 사용되는 비원형 단면을 가지는 파이프
KR101735444B1 (ko) * 2014-08-04 2017-05-16 김명준 비닐하우스 프레임의 구조
CN104782420B (zh) * 2015-04-30 2017-07-04 厦门农丰园大棚开发有限公司 农业大棚架及其连接装置
GB2549469B (en) 2016-04-14 2019-12-25 Haygrove Ltd Polytunnel structure

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1013109B (de) * 1956-08-13 1957-08-01 Theodor Terlinden Gewaechshaus
US4117636A (en) * 1976-10-13 1978-10-03 X. S. Smith, Inc. Plastic covered gutter connected greenhouse building structure
FR2386760A1 (fr) * 1977-04-07 1978-11-03 Richel Pierre Formage d'elements tubulaires fonctionnels pour la fabrication de serres tunnels et similaires
FR2388486A1 (fr) * 1977-04-29 1978-11-24 Baudouin Gerard Elements de charpente pour serre-tunnel
US4837990A (en) * 1986-06-24 1989-06-13 Alexander Peleg Sheltering structures and a method of assembling same
US5197238A (en) * 1989-06-15 1993-03-30 Alexander Peleg Enclosed structures
WO1991007081A1 (fr) * 1989-11-09 1991-05-30 Filclair S.A. Support multifonctions pour charpente de serre
US5655335A (en) * 1995-07-07 1997-08-12 Vermeer; Arthur Anthony Greenhouse structures and roof structures therefor
GB2407105A (en) * 2003-10-14 2005-04-20 Haygrove Ltd Gutter comprising flexible member
WO2017032979A1 (fr) * 2015-08-21 2017-03-02 Haygrove Limited Agencement de serre-tunnel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240423140A1 (en) * 2021-01-27 2024-12-26 Haygrove Limited Tunnel structure
US12564143B2 (en) * 2021-01-27 2026-03-03 Haygrove Limited Tunnel structure

Also Published As

Publication number Publication date
CO2018012142A2 (es) 2018-11-22
GB2549469A (en) 2017-10-25
PE20190097A1 (es) 2019-01-14
CN109152338A (zh) 2019-01-04
MA44667A (fr) 2019-02-20
ZA201807587B (en) 2020-02-26
CL2018002917A1 (es) 2019-03-15
EA201892130A1 (ru) 2019-04-30
WO2017178797A1 (fr) 2017-10-19
AU2017248710A1 (en) 2018-11-08
MX2018012528A (es) 2019-06-06
GB2549469B (en) 2019-12-25
EP3442322A1 (fr) 2019-02-20
CA3020712A1 (fr) 2017-10-19

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