EP0527110A1 - Etai - Google Patents

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Publication number
EP0527110A1
EP0527110A1 EP92810589A EP92810589A EP0527110A1 EP 0527110 A1 EP0527110 A1 EP 0527110A1 EP 92810589 A EP92810589 A EP 92810589A EP 92810589 A EP92810589 A EP 92810589A EP 0527110 A1 EP0527110 A1 EP 0527110A1
Authority
EP
European Patent Office
Prior art keywords
jaws
screw
forestay
thread
jaw
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.)
Withdrawn
Application number
EP92810589A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jean-Pierre Richoz
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.)
ILLA SA
Original Assignee
ILLA SA
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 ILLA SA filed Critical ILLA SA
Publication of EP0527110A1 publication Critical patent/EP0527110A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/065—Shores or struts; Chocks telescopic with parts held together by positive means by a threaded nut
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G2025/042—Shores or struts; Chocks telescopic with devices to avoid accidental disengagement of the telescopic elements, e.g. during transport

Definitions

  • the present invention relates to a forestay comprising a central screw movable axially in an external tube forming a support and a nut comprising at least two angular portions of nut arranged so as to be displaceable radially with respect to the screw between a position of cooperation with the thread of the screw and a clear position of this thread.
  • Shores of this type are described in Swiss patent no. 321018 and in European patent no. 0349485. They allow the screw to be brought quickly to the approximate working position, fine adjustment being effected by rotation of the nut in the cooperation with the screw.
  • the object of the present invention is to provide a prop of the movable central screw type, making it possible in particular to remedy the drawbacks mentioned above, simple to carry out, inexpensive and easy to set up.
  • the invention relates to a forestay comprising a central screw movable axially in an outer tube forming a support and a nut comprising at least two angular portions of nut arranged so as to be displaceable radially with respect to the screw between a position of cooperation with the thread of the screw and a position released from this thread, as defined in claim 1.
  • the forestay comprises an outer tube 1, forming a support, provided at one of its ends with a foot 2, intended to rest on the ground, for example in the form of a plate welded to the tube.
  • An inner tube 3 is placed in the tube 1 so that it can slide axially inside the tube 1.
  • the inner tube is provided at its upper end with a support element 4, for example in the form of a plate welded on the tube 3.
  • the tubes are fitted inside their corresponding end plate.
  • the tube 3 is provided with an external thread 5, intended for adjusting its position inside the tube 1 by cooperation with respective threaded parts of the ends of two jaws 6, 6 ′, said ends each forming an angular portion d 'nut and each comprising a limited number of thread portions 7 ( Figures 3 and 8), for example six in number in the example shown in the drawing, the lowest thread portion of each nut portion being made with a reduced depth, so as to facilitate the release of the jaws.
  • Each of the jaws has a protruding part 8 constituting the half-portion of nut provided with threads 7.
  • This protruding part has a lower flange 9 intended to come to bear on the inner part of an annular flare 10 in the form of a conical seat located at the upper part of the outer tube 1.
  • the two jaws 6, 6 ′ are made integral with one another by means of two half-rings 11 secured by means of two pins 12 , 12 ′.
  • Each of the half-rings 11 is provided on its sides with two fixing bars 20, 20 ′ in which are provided holes 21, 21 ′ intended for the passage of the pins 12, 12 ′.
  • the ring-jaw assembly is arranged so as to be able to rotate freely around the outer tube 1, by simply pressing the flanges 9, 9 ′ of the jaws on the upper part 10 in the form of a conical seat of the outer tube ( Figures 2 and 3) .
  • the pins 12, 12 ′ are arranged horizontally. They cross the jaws right through, so as to allow the jaws to pivot around the pins.
  • the amplitude of this rotational movement is limited by the space formed between the base parts 13, 13 ′ of the jaws and the outer surface of the ring, the width of said space being chosen so that in any case the flanges 9 , 9 ′ of the jaws cannot come out of the conical seat 10 at the upper end of the outer tube 1.
  • Maintaining the jaws in the cooperation with the thread of the threaded inner tube is obtained by means of two compression springs 14, 14 ′ arranged horizontally at a level substantially lower than that of the pins 12, 12 ′, one of the ends of each of said springs pressing against the outer surface of the ring (or according to a variant inside a housing provided on the surface of the ring) and at its other end against the bottom of a housing 39 produced inside the base part 13 of the jaw.
  • Each of the ends of the spring can be fixed to the elements against which it is supported.
  • Arms, or handles, 15, 15 ′, are mounted in rotation on the rear parts 16, 16 ′ of the jaws.
  • the arms are mounted on the jaws using pins 17, 17 ′, distinct from the pins 12, 12 ′.
  • the forestay has only one pair of pins 19, 19 ′ serving both as the axis of rotation of the jaws and as the axis of rotation of the arms.
  • the dismantling of the forestay is carried out in reverse, by first loosening the forestay by rotating the jaws around the inner tube 1, then by quickly dropping the inner tube by gravity, a simple lateral support on the arms 15, 15 ′ in the direction of the arrows 18, 18 ′ sufficient for the release of the nut parts 8, 8 ′ of the thread 5 of the inner tube 3.
  • FIGS. 12 and 13 A second alternative embodiment of a forestay comprising only a single pair of pins 19, 19 ′, serving both as the axis of rotation of the jaws and the axis of rotation of the arms, is shown in FIGS. 12 and 13.
  • the jaws 36, 36 ′ (shown in detail in FIGS. 14 to 16) of this second prop of the forestay have a general external shape more rounded than that of the jaws of the forestay of FIG. 9, this gives them a more aesthetic appearance.
  • the configuration of the jaws 36, 36 ′ has been studied so as to facilitate their operation, in particular thanks to the greater spacing between the base parts 37, 37 ′ of the jaws and the outer tube 1.
  • the jaws 36, 36 ′ are pivotally mounted at the end of fixing bars 43, 43 ′ of two fixing flanges 42, each of the flanges 42 being fixed, for example by welding, on a unitary ring 41 placed around the outside tube 1.
  • the inside diameter of the ring 41 is substantially greater than the outside diameter of the outside tube 1, so that the ring can rotate freely around the tube 1.
  • the flange 42 and its two bars 43, 43 ′ are in one piece.
  • the two flanges 42 could be replaced by four bars, directly fixed in pairs on the ring 41.
  • the ring 41 can be replaced by two half-rings of the type of those of FIGS. 4 and 5, but provided with oblique bars, each of the half-rings and its bars being made up of a single piece.
  • FIGS 25 and 26 there is shown in Figures 25 and 26 an alternative embodiment of the jaw 36 shown in Figures 14 to 16.
  • the compression springs 14, 14 ′ are replaced by flat springs 45.
  • the housing 39 formed in the base part 37 of the jaw can be replaced by a recess 46 of lesser importance.
  • the length of the inner tube is greater than that of the outer tube, for example 10 cm, so as to constitute a hand guard during the sudden fall of said inner tube by gravity.
  • the inner tube has at its lower part a non-threaded part, for example 30 cm in length, as well as a stop device.
  • a blocking or anti-disengagement device may be provided so as to prevent the removal of the central screw from the outer tube.
  • An example of an anti-dislodging device is shown in FIG. 24.
  • This device comprises two rivets 55, arranged near the upper end of the outer tube 1, on the same axis on either side of the tube. These rivets are intended to cooperate with the flared part 56 of the lower end of the inner tube 3. They can be replaced by screws or any other members projecting inside the tube. The number of two is not imperative, there can be one or more.
  • the flared part 56 at the base of the inner tube can also be replaced by an outer rib disposed around the inner tube, in its lower part.
  • the outer tube and the inner tube, as well as the two half-rings (or the ring and the flanges of the variant) and the handles are made of steel
  • the two jaws can be made of special cast iron , for example in spheroidal graphite cast iron or malleable cast iron.
  • the shape of the thread of the inner tube, as well as that of the thread portions of the jaws can be trapezoidal, the thread of the inner tube can be obtained by cold rolling, which in particular has the advantage of not weakening the mechanical strength of the tube.
  • the angle of inclination (relative to the axis of the tube) of the annular flare 10 at the upper end of the outer tube can be chosen very freely depending on the embodiment of said flare.
  • the forestay may be provided with a protective cap or bell 24, such as for example that shown in FIGS. 10 and 11.
  • This cap covers the jaws as shown in FIG. 1. Its sole function is to avoid infiltration of dirt in the forestay, such as cement milk, in particular between the thread of the inner tube and the conical seat of the outer tube. It comprises two ribs 25, 25 ′ intended for its stiffening and a flange 26 intended to be clipped around the flared part of the end of the outer tube 1.
  • a 24 ′ variant of this type of cape is shown mounted on the forestay of FIG. 12.
  • FIGS. 19 to 22 Another embodiment of the protective cap or bell is shown in FIGS. 19 to 22.
  • This cap 50 preferably made of plastic material, in particular of thermoplastic material (for example of the PE-ND Carlona Shell type), is shaped so as to be able to thread around the inner tube 3 and come to cover the threaded part of the two jaws, as well as the upper part 10 in the form of a conical seat of the outer tube, closing, thanks to its elasticity, below the rounding 38, 38 ′ of the jaws, the edges 51, 51 ′ of the legs 52, 52 ′ of the cap coming to bear under said rounded parts 38, 38 ′.
  • the configuration of this cap 50 makes it possible to be able to raise it along the inner tube 3, after having spread the tabs 52, 52 ′, thanks to the elasticity of the material of the bell, so as to allow for example the cleaning of the prop.
  • the upper end of the bell 50 has an internal chamfer so as to prevent the bell from catching on the thread of the tube.
  • the forestay according to the invention still has many advantages over the forestays that are known.
  • the design of the jaws and their actuating arms which need only be actuated downward to release the nut portions from the thread of the screw, makes it possible to obtain the release of the nut portions by a single pivoting movement of the jaws and not by a combined movement as is the case with known props.
  • the solution adopted greatly simplifies and facilitates this release.
  • the central screw is removed from the outer tube, the number of spare parts of the forestay described here is limited to two (cape not included), since the ring-jaw assembly remains integral with the outer tube . There is therefore no risk of losing parts.
  • the reassembly of the forestay is very simple, since it suffices to press laterally on the arms to rotate the jaws and introduce the screw. It can also be noted that, the cape having the sole function of preventing dirt from entering the forestay, but having no function for the actuation of the device (such as the head support function known props described above), this cape can be made of a particularly light material, for example light sheet or plastic.
  • forestay described here can be used without any risk of detachment in a standing position with the head up or head down, as well as in the lateral position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Rehabilitation Tools (AREA)
EP92810589A 1991-08-05 1992-08-03 Etai Withdrawn EP0527110A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH2312/91 1991-08-05
CH231291 1991-08-05
CH1164/92 1992-04-09
CH116492 1992-04-09

Publications (1)

Publication Number Publication Date
EP0527110A1 true EP0527110A1 (fr) 1993-02-10

Family

ID=25686854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810589A Withdrawn EP0527110A1 (fr) 1991-08-05 1992-08-03 Etai

Country Status (4)

Country Link
EP (1) EP0527110A1 (ja)
JP (1) JPH05187136A (ja)
KR (1) KR930019963A (ja)
TW (1) TW202492B (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2305677A (en) * 1995-09-26 1997-04-16 Viking Products Ltd Quick-deploying prop
GB2325012A (en) * 1997-05-06 1998-11-11 Shih Lung Li Steel post for supporting a molding board
FR2764961A1 (fr) * 1997-06-22 1998-12-24 Elgressy Elie Systeme de support avec ajustement vertical
ES2146166A1 (es) * 1997-05-06 2000-07-16 Shih Lung Li Pilar de acero para soportar un encofrado.
US6752570B2 (en) * 2002-04-08 2004-06-22 Richard Lanka Shoring system apparatus and method for shoring
CN110182706A (zh) * 2018-02-22 2019-08-30 Vis有限责任公司 下部提升支撑架
USD907880S1 (en) 2018-11-29 2021-01-12 Vis, Llc Under hoist support stand
CN113356637A (zh) * 2021-06-17 2021-09-07 南宁职业技术学院 一种土木工程装配式建筑支柱
CN115262748A (zh) * 2022-07-26 2022-11-01 山东中建八局投资建设有限公司 一种拼装组件及钢结构房屋

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100450574B1 (ko) * 2001-10-23 2004-10-06 한국산업안전공단 높이 조절이 가능한 하중 지지장치
CN106522535B (zh) * 2016-10-28 2018-09-14 湖北思泽新能源科技有限公司 一种连接牢固的脚手架顶撑

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH348806A (de) * 1957-01-30 1960-09-15 Rieder Oscar Baustütze
FR1468326A (fr) * 1965-03-05 1967-02-03 Access Equipment Ltd étai ajustable pour échafaudages et constructions similaires
US3603552A (en) * 1968-11-26 1971-09-07 Mills Scaffold Co Ltd Adjustable struts
GB1588942A (en) * 1978-01-03 1981-05-07 Access Plant Jacking device for a scaffolding structure
EP0349485A1 (fr) * 1988-06-28 1990-01-03 Etablissement Nanicoba Etai
WO1991000965A1 (fr) * 1989-07-13 1991-01-24 Marcel Arteon Ecrou rapide

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH348806A (de) * 1957-01-30 1960-09-15 Rieder Oscar Baustütze
FR1468326A (fr) * 1965-03-05 1967-02-03 Access Equipment Ltd étai ajustable pour échafaudages et constructions similaires
US3603552A (en) * 1968-11-26 1971-09-07 Mills Scaffold Co Ltd Adjustable struts
GB1588942A (en) * 1978-01-03 1981-05-07 Access Plant Jacking device for a scaffolding structure
EP0349485A1 (fr) * 1988-06-28 1990-01-03 Etablissement Nanicoba Etai
WO1991000965A1 (fr) * 1989-07-13 1991-01-24 Marcel Arteon Ecrou rapide

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2305677A (en) * 1995-09-26 1997-04-16 Viking Products Ltd Quick-deploying prop
GB2325012A (en) * 1997-05-06 1998-11-11 Shih Lung Li Steel post for supporting a molding board
FR2763622A1 (fr) * 1997-05-06 1998-11-27 Lung Li Shih Poteau en acier destine a supporter une plaque de moulage
GB2325012B (en) * 1997-05-06 2000-04-26 Shih Lung Li Steel post for supporting a molding board
ES2146166A1 (es) * 1997-05-06 2000-07-16 Shih Lung Li Pilar de acero para soportar un encofrado.
FR2764961A1 (fr) * 1997-06-22 1998-12-24 Elgressy Elie Systeme de support avec ajustement vertical
US6752570B2 (en) * 2002-04-08 2004-06-22 Richard Lanka Shoring system apparatus and method for shoring
GB2572850A (en) * 2018-02-22 2019-10-16 Vis Llc Under hoist support stand
CN110182706A (zh) * 2018-02-22 2019-08-30 Vis有限责任公司 下部提升支撑架
GB2572850B (en) * 2018-02-22 2022-12-14 Vis Llc Under hoist support stand
US11597637B2 (en) * 2018-02-22 2023-03-07 Vis, Llc Under hoist support stand
AU2019201168B2 (en) * 2018-02-22 2024-04-18 Vis, Llc Under hoist support stand
USD907880S1 (en) 2018-11-29 2021-01-12 Vis, Llc Under hoist support stand
CN113356637A (zh) * 2021-06-17 2021-09-07 南宁职业技术学院 一种土木工程装配式建筑支柱
CN115262748A (zh) * 2022-07-26 2022-11-01 山东中建八局投资建设有限公司 一种拼装组件及钢结构房屋
CN115262748B (zh) * 2022-07-26 2023-11-10 山东中建八局投资建设有限公司 一种拼装组件及钢结构房屋

Also Published As

Publication number Publication date
KR930019963A (ko) 1993-10-19
JPH05187136A (ja) 1993-07-27
TW202492B (ja) 1993-03-21

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