EP1975341B1 - Etais avec dispositif de démoulage - Google Patents

Etais avec dispositif de démoulage Download PDF

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Publication number
EP1975341B1
EP1975341B1 EP07380084A EP07380084A EP1975341B1 EP 1975341 B1 EP1975341 B1 EP 1975341B1 EP 07380084 A EP07380084 A EP 07380084A EP 07380084 A EP07380084 A EP 07380084A EP 1975341 B1 EP1975341 B1 EP 1975341B1
Authority
EP
European Patent Office
Prior art keywords
strut
pin
anchoring piece
nut
inner tube
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.)
Not-in-force
Application number
EP07380084A
Other languages
German (de)
English (en)
Other versions
EP1975341A1 (fr
Inventor
Iñigo KEREJETA GARMENDIA
Angel Tomás Ugarte Urcelay
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.)
Ulma CyE S Coop
Original Assignee
Ulma CyE S Coop
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 Ulma CyE S Coop filed Critical Ulma CyE S Coop
Priority to PL07380084T priority Critical patent/PL1975341T3/pl
Priority to ES07380084T priority patent/ES2366967T3/es
Priority to AT07380084T priority patent/ATE515609T1/de
Priority to EP07380084A priority patent/EP1975341B1/fr
Publication of EP1975341A1 publication Critical patent/EP1975341A1/fr
Application granted granted Critical
Publication of EP1975341B1 publication Critical patent/EP1975341B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/061—Shores or struts; Chocks telescopic with parts held together by positive means by pins
    • 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
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/068—Shores or struts; Chocks telescopic with parts held together by positive means by a cam

Definitions

  • the present invention relates to a strut with stripping mechanism which is applicable within the field of construction, enabling a quick removal of the strut which allows the time said operation requires to be reduced, with the subsequent reduction in execution costs of a work, all with elements which are simple to manufacture, robust and versatile, which allows already existing struts to be used.
  • struts are known in the field of construction in order to support the shuttering structure of the floor slabs during the execution thereof, for which purpose the shuttering contains the fresh concrete during its pouring until the stipulated time has passed; after its setting, the shuttering is removed, which allows undertaking the execution of another floor slab or any other task in the work.
  • These struts consist of a telescopic tube which extends until its length is equal to the distance between floor slabs, so that the lower end rests on an already executed foot plate or floor slab and the upper end supports the floor slab shuttering which is executed on an upper level.
  • the strut Once the strut has been extended until its working length, its telescopic ends are fixed or anchored, which is performed by the disposal of pins or elements which serve as limit for the relative position of both ends, which rest on a nut which is found in one of the tubes and which, by screwing, allows the relative position of both tubes to be defined.
  • a device for the unloading of struts which comprises a bushing with the possibility of sliding with respect to one of the portions of the strut and which rests on the setscrew of the strut and which has diametrically opposing grooves wherein a pin is located, being configured to house two protuberances in a form similar to another sliding piece on the exterior of the strut shank.
  • This mechanism is complex, both in its manufacturing and in uncomfortable use, having little robustness as a consequence of the breakage or spoilage of the strut when any blows occur, especially in said protuberances, something which is frequent in the field of construction work, which means that the contact between the mechanism elements is defective, the part losing its entire functionality.
  • Spanish utility model with publication number ES 1045613 U relates to a strut for shuttering which comprises a pin which enables the position of two telescopic portions of the strut to be blocked. Said pin locks and unlocks in a certain position using a rotational part which has projections at different levels, whereon the pin rests and determines the position of the upper body of the strut.
  • the main drawback of this strut is that the rotational part fits around the upper body or tube, for which reason it must be rotated by sharp blows, due to its loaded position with the weight of the shuttering, both to be positioned in the locked position and to be positioned in the unlocked or release position, causing premature wear and deterioration of the upper tube of the strut. Furthermore, to move the rotational piece it is necessary to apply a torque of considerable force, which means that on hitting one end thereof, it is necessary for this blow to be transmitted to the strut in order to achieve the torque necessary to cause the part to rotate, which again leads to premature wear of the strut, in which section there finally appears a groove of wear and the marks of the hammer blows.
  • Spanish utility model with publication number ES 1054199 U relates to a quick decentering which comprises two telescopic tubes and a pin configured to quickly withdraw the strut when its use is no longer necessary.
  • Said pin transversally passes through an inner tube whose end is in contact with the shuttering, said pin having lower notches which constitute a difference in level and which cause a slight drop in height of the inner tube when it moves horizontally therein, by effect of a dry blow, enabling the quick removal of the strut.
  • United States patent with publication number US 4,752,057 defines a strut which has a functioning principle similar to that of the strut described in the previous paragraph, with differences in the configuration of the pin element, having the drawback of the wear that usually occurs in the notches of the pin, as a consequence of the contact with the walls of the tube, which rest on said notches, and particularly as a consequence of the difference in level of the tube, which is achieved by blows which bring about the horizontal movement of the pin.
  • a strut according to the preamble of claim 1 is described in the German patent applications DE 37 39754 A1 and DE 4329910 A1 .
  • the present invention relates to a strut with stripping mechanism which permits its quick and simple removal by an operation which does not damage or deteriorate any elements of the strut, which manages to reduce the times that said operation requires, or reduce the manpower necessary to collect the struts for a same collection time, either to execute the next floor slab or to store the struts, said time reduction being greater the larger the surface strutted, which leads to a reduction in the execution costs of the work.
  • the strut of the invention comprises elements which are simple and cheap to manufacture, which are highly robust, which lead to an extension of its useful life, being extremely versatile, making it possible to use the struts which are already existing or available on site, by the incorporation of their elements.
  • the strut with stripping mechanism that the invention proposes comprises an outer tube configured to telescopically house an inner tube, both tubes preferably having a circular section and the outer tube being configured to rest on a support surface, which typically is an already executed foot plate or floor slab, by a first end which has fixed, for example by welding, a lower support plate that can consist of a plate with orifices for its securing to the support surface, at one end having a threaded portion, or having fixed a bushing which is externally threaded.
  • the inner tube is configured to play telescopically in the interior of the outer tube, said inner tube having fixed at one free end, for example, by welding, an upper support plate which may consist of a plate with orifices for its securing to a surface to be strutted, which may be a lower surface of a floor slab shuttering, or an already executed structural element which needs to be strutted, for example in renovation work.
  • an upper support plate which may consist of a plate with orifices for its securing to a surface to be strutted, which may be a lower surface of a floor slab shuttering, or an already executed structural element which needs to be strutted, for example in renovation work.
  • the outer tube comprises a threaded portion which has two diametrically opposing slides with longitudinal orientation, i.e. oriented towards a central shaft of the outer tube, said slides being configured to house and guide a pin, preferably with circular section which is tightly housed in the slides.
  • the pin is configured to be housed in two diametrically opposing orifices of the inner tube, which means that the play of the pin in the orifices and in the slides permits and defines a stroke for the relative position between the outer tube and the inner tube, whose position is defined by a nut configured to screw in the threaded portion, which defines its height position, and to support an anchoring piece, or locking piece, which is configured to make contact with the pin, so that the positioning of the nut and its contact with the pin defines the height and position of the inner tube, typically raising said nut until contact is made with the inner tube, specifically of the upper support plate with the surface to be strutted.
  • the anchoring piece which preferably tightly contains the outer tube, comprises an upper notch and a lower notch positioned at a lower level, i.e. underneath that of the upper notch when the anchoring piece is in working position resting on the nut.
  • the anchoring piece is configured to move in a direction perpendicular to the outer tube and be placed in a locked position, wherein the pin is in contact with the upper notch, specifically resting on said upper notch, and an unlocked position wherein the pin is in contact with or resting on the lower notch.
  • the anchoring piece fits on the outer tube having a clearance in a direction perpendicular thereto which permits its movement, tightly being in contact with the outer tube in a direction perpendicular to the previously defined direction of movement of the anchoring piece, although it can freely rotate with respect to the outer tube with no other restriction than contact with the pin.
  • the anchoring piece comprises at least one anchoring stop, preferably two, configured to make contact with the pin, specifically with a bent portion of said pin, when said anchoring piece is in the locked position, therefore the pin has a configuration similar to that of a clip.
  • at least one, anchoring stop is formed by a substantially vertical surface which is perpendicular to, and extends from, the substantially horizontal plane of the lower notch.
  • the anchoring piece comprises a button, preferably a thickened area in the area of the anchoring stop of similar section to that of a hammer for hitting with this tool, said button being configured to receive an impact when said anchoring piece is in the locked position which moves said anchoring piece to the unlocked position, for which reason the lower notch is positioned between the upper notch and the anchoring stop.
  • the anchoring piece comprises a tab positioned in the upper notch, said tab being configured to contain one end of the pin limiting its position in the orifices of the inner tube.
  • the nut comprises an actuating lever configured to screw said nut in the threaded portion by its actuation by a user.
  • the inner tube comprises means indicative of a total length of the strut, for example, by recording the height, being visible through the slides so that the user has information on the height between floor slabs during the placement of the strut.
  • the strut that the invention proposes constitutes an advance in the struts used to date, and resolves the aforementioned problems in a fully satisfactorily manner, in the line to permit reducing the times necessary for their removal, which is performed in a simple way, with the subsequent reduction in costs to execute the works, all with simple elements of manufacturing, that are robust and versatile, which permits its incorporation in already existing struts.
  • the strut with stripping mechanism comprises an outer tube (1) configured to telescopically house an inner tube (2), the outer tube (1) being configured to rest on a support surface (6) by a first end which has a support plate (5) welded, having a threaded portion (3) at the opposite end.
  • the inner tube (2) is configured to play telescopically in the interior of the outer tube (1), said inner tube (2) having an upper support plate (4) welded at a free end to secure it to a surface to be strutted (7), as can be seen in figure 1 .
  • the outer tube (1) comprises a threaded portion (3) which has two diametrically opposing slides (10) with longitudinal orientation, said slides (10) being configured to house and guide a pin (12) with circular section which is tightly housed in said slides (10).
  • the pin (12) is configured to be housed in two diametrically opposing orifices (11) of the inner tube (2), which means that the play of the pin in the orifices (11) and in the slides (10) defines a stroke for the relative position between the outer tube (1) and the inner tube (2), whose position is defined by a nut (8) configured to screw in the threaded portion (3) and support an anchoring piece (13) which is configured to make contact with the pin (12).
  • the anchoring piece (13), which tightly contains the outer tube (1), comprises an upper notch (15) and a lower notch (16) positioned at a level below that of the upper notch (15) when the anchoring piece (13) is in working position resting on the nut (8), as can be seen in the figures.
  • the anchoring piece (13) is configured to move in a direction perpendicular to the outer tube (1) and be placed in a locked position, shown in figures 1 , 5 and 6 , wherein the pin (12) is in contact with the upper notch (15), specifically resting on said upper notch (15), and an unlocked position wherein the pin (12) is in contact with or resting on the lower notch (16), as is shown in figure 7 .
  • the anchoring piece (13) comprises two anchoring stops (14) configured to make contact with the pin (12), specifically with a bent portion of said pin (12), when said anchoring piece (13) is in the locked position, for which reason the pin (12) has a configuration similar to that of a clip.
  • the anchoring stops (14) are located at the same level as the lower notch (16).
  • the anchoring piece (13) comprises a button (17), in the area of the anchoring stop (14), configured to receive an impact with a hammer when said anchoring piece (13) is in the locked position so that it moves said anchoring piece (13) to the unlocked position, for which reason the lower notch (16) is positioned between the upper notch (15) and the anchoring stop (14).
  • the anchoring piece (13) comprises a tab (15') positioned in the upper notch (15), said tab (15') being configured to contain one end of the pin (12), limiting its position in the orifices (11) of the inner tube (2).
  • the nut (8) comprises an actuating lever (9) configured to screw said nut (8) in the threaded portion (3) by its actuation by a user.
  • the inner tube (2) comprises means indicative of a total length of the strut, which consists of recording the height, it being visible through the slides (10) so that the user has information on the height between floor slabs during the placement of the strut.

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)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Claims (5)

  1. Etais muni d'un mécanisme décoffrage, comprenant un tube extérieur (1) recevant de manière télescopique un tube intérieur (2),
    le tube extérieur (1) ayant une partie filetée (3) avec deux coulisses (10) diamétralement opposés et d'orientation longitudinale pour recevoir une broche (12) logée dans deux orifices (11) diamétralement opposés du tube intérieur (2),
    l'étais ayant également un écrou (8) pour se visser sur la partie filetée (13),
    - l'écrou (8) étant configuré pour tenir une pièce d'ancrage (13) ayant une encoche supérieure (15) et une encoche inférieure (16) situées à des niveaux différents,
    - la pièce d'ancrage (13) étant conçue pour être déplacée dans une direction perpendiculaire au tube extérieur (1) et être mise en position verrouillée dans laquelle la broche (12) est en contact avec l'encoche supérieure (15) et une position déverrouillée dans laquelle la broche (12) est en contact avec l'encoche inférieure (16),
    - la pièce d'ancrage (13) ayant au moins une butée d'ancrage (14) configurée pour venir en contact avec la broche (12) lorsque la pièce d'ancrage (13) est en position verrouillée,
    étais caractérisé en ce qu'
    au moins une butée d'ancrage (14) est formée par une surface pratiquement verticale perpendiculaire à un plan horizontal de l'encoche inférieure (16) et issue de ce plan horizontal.
  2. Etais muni d'un mécanisme de décoffrage selon la revendication 1,
    caractérisé en ce que
    la pièce d'ancrage (13) comporte une tête (17) formée d'une zone épaissie ayant une section analogue à celle d'un marteau, la tête (17) étant configurée pour recevoir un impact lors que la pièce d'ancrage (13) est en position verrouillée, de façon à déplacer la pièce d'ancrage (13) et à la mettre en position déverrouillée.
  3. Etais muni d'un mécanisme de décoffrage selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la pièce d'ancrage (13) comporte une patte une patte (15') dans l'encoche supérieure (15), cette patte (15') étant configurée pour retenir une extrémité de la broche (12) et limiter sa position dans l'orifice (11) du tube intérieur (2).
  4. Etais muni d'un mécanisme de décoffrage selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'écrou (8) comporte un levier (9) configuré pour visser l'écrou (8) dans la position filetée (3) lorsque l'écrou est actionné par l'utilisateur.
  5. Etais muni d'un mécanisme de décoffrage selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le tube intérieur (2) comporte un moyen indiquant la longueur totale de l'étais.
EP07380084A 2007-03-29 2007-03-29 Etais avec dispositif de démoulage Not-in-force EP1975341B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL07380084T PL1975341T3 (pl) 2007-03-29 2007-03-29 Rozpórka z mechanizmem demontażowym
ES07380084T ES2366967T3 (es) 2007-03-29 2007-03-29 Puntal con mecanismo de desencofrado.
AT07380084T ATE515609T1 (de) 2007-03-29 2007-03-29 Stütze mit ausschalmechanismus
EP07380084A EP1975341B1 (fr) 2007-03-29 2007-03-29 Etais avec dispositif de démoulage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07380084A EP1975341B1 (fr) 2007-03-29 2007-03-29 Etais avec dispositif de démoulage

Publications (2)

Publication Number Publication Date
EP1975341A1 EP1975341A1 (fr) 2008-10-01
EP1975341B1 true EP1975341B1 (fr) 2011-07-06

Family

ID=38335678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07380084A Not-in-force EP1975341B1 (fr) 2007-03-29 2007-03-29 Etais avec dispositif de démoulage

Country Status (4)

Country Link
EP (1) EP1975341B1 (fr)
AT (1) ATE515609T1 (fr)
ES (1) ES2366967T3 (fr)
PL (1) PL1975341T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101641576B1 (ko) * 2015-10-30 2016-07-21 주식회사 진아스틸 슬래브 거푸집 지지용 동바리 해체장치

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012027351A2 (fr) * 2010-08-23 2012-03-01 Titan Formwork Systems, Llc Montant d'étayage avec élément à libération rapide
DE102011122065A1 (de) * 2011-12-22 2013-06-27 Peri Gmbh Gegenseitige , lösbare verbindung zweier stützenabschnitte einer längenveränderlichen baustütze
EP3816367A1 (fr) * 2019-10-28 2021-05-05 DOKA GmbH Support de coffrage
EP3835513B1 (fr) * 2019-12-11 2022-08-31 Sistemas Técnicos de Encofrados, S.A. Dispositif de sécurité pour les étais
WO2022034493A1 (fr) * 2020-08-10 2022-02-17 Peri Ag Ensemble étançon d'acier télescopique réglable ayant une action de poussée-traction

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2127886B (en) * 1982-09-21 1986-01-15 Acrow Drop-head prop
DE3739754A1 (de) * 1987-11-24 1989-06-08 Mueller & Baum Hoehenverstellbare stuetze fuer eine deckenschalung
US5310153A (en) * 1993-04-26 1994-05-10 Jackson George W Quick release washer for a shoring post
DE4329910A1 (de) * 1993-09-04 1995-03-09 Mueller & Baum Höhenverstellbare Stütze für eine Deckenschalung
JP2920877B2 (ja) * 1996-07-26 1999-07-19 大同機工株式会社 パイプ支柱の瞬時負荷荷重解除方法とその瞬時嵩下げ部品
ES2224889B1 (es) * 2004-06-03 2006-03-16 Ingenieria De Encofrados Y Servicios, S.L. Puntal para obras.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101641576B1 (ko) * 2015-10-30 2016-07-21 주식회사 진아스틸 슬래브 거푸집 지지용 동바리 해체장치

Also Published As

Publication number Publication date
PL1975341T3 (pl) 2011-12-30
ES2366967T3 (es) 2011-10-27
ATE515609T1 (de) 2011-07-15
EP1975341A1 (fr) 2008-10-01

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