EP0783065A1 - Schaltafel mit automatischer Spannvorrichtung - Google Patents

Schaltafel mit automatischer Spannvorrichtung Download PDF

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Publication number
EP0783065A1
EP0783065A1 EP97400018A EP97400018A EP0783065A1 EP 0783065 A1 EP0783065 A1 EP 0783065A1 EP 97400018 A EP97400018 A EP 97400018A EP 97400018 A EP97400018 A EP 97400018A EP 0783065 A1 EP0783065 A1 EP 0783065A1
Authority
EP
European Patent Office
Prior art keywords
tie rod
tie
rod
formwork
nuts
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Withdrawn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
EP97400018A
Other languages
English (en)
French (fr)
Inventor
Jacques Buysschaert
Victor Elsendoorn
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.)
Sateco SA
Original Assignee
Sateco 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 Sateco SA filed Critical Sateco SA
Publication of EP0783065A1 publication Critical patent/EP0783065A1/de
Withdrawn legal-status Critical Current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
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
    • E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
    • E04G17/0651—One-piece elements
    • 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
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties

Definitions

  • the present invention relates to a metal formwork used for the construction of walls or other reinforced concrete works.
  • Such forms are known, of the type comprising two forms arranged substantially parallel to each other and a formwork for tightening the forms comprising at least one tie connecting the two forms, the tie being immobilized in traction by a first end on a first form, the second panel comprising means for axially guiding the tie rod in which it is free to slide.
  • the forms are connected to one another by one or more threaded tie rods extending substantially perpendicular to the forms. These tie rods cross the formwork right through and carry at each end a nut which bears against the external surface of the formwork. In order to tighten the forms, and in particular to bring them closer, the nuts are screwed in abutment against the forms, so that the gap between the latter decreases and that they come to be applied against spacers.
  • the invention aims to provide a formwork, the approximation and tightening of the forms can be done in a simple and convenient manner by a single operator.
  • the invention relates to a formwork of the aforementioned type, characterized in that the tightening device for the formwork comprises a jack, which is arranged substantially transversely to the tie rod, this jack comprising on the one hand, a body fixed on the second form and on the other hand, a movable jack rod provided at its end with a cam actuating surface for the tie rod, which tie rod comprises at its second end a cam follower adapted to cooperate with said cam in order to cause the two panels to be tightened when the actuator is actuated.
  • the tightening device for the formwork comprises a jack, which is arranged substantially transversely to the tie rod, this jack comprising on the one hand, a body fixed on the second form and on the other hand, a movable jack rod provided at its end with a cam actuating surface for the tie rod, which tie rod comprises at its second end a cam follower adapted to cooperate with said cam in order to cause the two panels to be tightened when the actuator is actuated.
  • the formwork shown in Figure 1 has two forms 10, 12, arranged vertically, face to face and substantially parallel to each other.
  • Each panel comprises a parallelepipedic frame 14 closed on one side by a panel 16 delimiting a formwork surface.
  • a tightening and tightening device comprising two pairs of tie rods, arranged two by two in two vertical parallel planes.
  • tie rods 18 and 20 are shown. They are contained in the same vertical plane P (plane of Figures 1 and 6), perpendicular to the shuttering surfaces 16. These tie rods are formed by threaded rods.
  • the first section 10 comprises a support 22 in which is fixed a device 24 for unidirectional locking of the tie rod 18.
  • the device will be described in detail with reference to FIGS. 2, 4 and 5.
  • the second section 12 also comprises a support 26, in which is integrated a device 28 for pulling the tie rod 18.
  • the device 28 is disposed behind a passage 29 for guiding the tie rod in which the latter is free to slide.
  • the devices 24 and 28 are arranged at substantially the same height, so that the tie rod 18 extends substantially horizontally.
  • the tie rod 20 is arranged in the lower part of the formwork. It crosses the shuttering walls 16 along guide passages 30, 32 behind which are welded reinforcement angles 30A, 32A.
  • the tie rod is immobilized in traction at a first end by a unidirectional locking device 34 similar to the device 24.
  • the locking device 34 is for example welded to the frame 14 of the first section.
  • the second end of the tie rod 20 is engaged in a traction device 36, similar to the device 28 and carried by the second panel 12.
  • a hydraulic cylinder 38 with double rod is integrated in the second section 12 to actuate the traction devices 28 and 36. It is controlled by a hydraulic hand pump not shown.
  • the axis of this jack extends in the plane P defined by the tie rods 18 and 20 and is arranged substantially perpendicular to the tie rods.
  • the body of the jack 39 is fixed to the structure of the panel 12, while the actuating rods, denoted respectively 40 and 42, are directed upwards and downwards in order to simultaneously actuate the traction devices 28 and 36
  • This cylinder allows the simultaneous movement of the two actuating rods 40, 42 in opposite directions.
  • FIG 2 is shown the device 24 for unidirectional locking of the tie rod 18.
  • the device 34 is identical.
  • Such a device comprises a cylindrical cage 50 open at its two ends in which are received two free half-nuts 52, 54 and a helical spring 56.
  • the cage 50 comprises a tube 58 closed at its first end by a sleeve 60 and at its second end by a crown 62 forming the bottom.
  • the sleeve 60 has an axial passage 64 for guiding the tie rod 18. It has on its inner face a conical bearing surface 66 bordering the passage 64. It thus forms a concave blocking seat for the two half-nuts 52,54.
  • half-nuts are identical. They are each formed of a half-sleeve, cut along a longitudinal plane.
  • the two associated half-nuts define an axial duct 68 for receiving the tie rod 18. This duct is tapped over its entire length.
  • Each half-nut has two successive sections 70, 72 of substantially equal length and of different thickness.
  • the section 70 oriented towards the seat 60 has an external overthickness 74. It has at its end opposite the seat 60, an external frustoconical chamfer 76, whose angle at the top is substantially equal to that of the bearing surface 66 At this same end, the axial duct 68 is flared by an internal chamfer 78.
  • the opposite end of the extra thickness 74 delimits an annular bearing front 80 for the spring 56.
  • a groove 82 with an inclined side wall is also formed externally on the section 72.
  • the spring 56 surrounds the section 72. It is compressed between the bearing front 80 and the crown 62 and urges the two half-nuts 52, 54 against the bearing surface 66.
  • the half nuts thus form a wedge between the seat 60 and the tie rod 18, guaranteeing the immobilization in traction of the latter.
  • FIG. 3 is shown in detail the traction device 28 of FIG. 1.
  • This device comprises a sleeve 100 crossed by a cylindrical duct 102 with a smooth wall of diameter slightly greater than that of the tie rod 18.
  • This sleeve has in its side wall outer two grooves 104, 106 symmetrical with respect to the plane P.
  • the grooves 104, 106 are delimited by flat bottoms 104A, 106A and two banks two by two coplanar.
  • a first bank 104B, 106B (FIG. 1) extends perpendicular to the axis of the sleeve, while the other bank 104C, 106C defines with it a non-zero angle.
  • These two banks 104C, 106C form a two-part cam follower inclined by about 30 ° relative to the axis of the jack.
  • the two parts 104C, 106C of the cam follower are adapted to cooperate with a corresponding cam surface in two parts 110, 112 carried at the end of teeth 114, 116 of a fork 118 extending axially the cylinder rod 40.
  • the distance between the teeth 114, 116 is substantially equal to the distance separating the bottoms 104A, 106A, the teeth thus being partially received in the grooves 104, 106.
  • the two parts 110, 112 of the cam surface are coplanar and are inclined by relative to the cylinder axis of the same angle as the banks 104C, 106C delimiting the cam follower.
  • the sleeve 100 and the fork 118 are protected by two side walls 120, 122 of the support 26 and by a front closure wall 124, in which is formed the passage 29 for guiding the tie rod 18.
  • This passage is extended by an overbore 126 for guiding the sleeve 100 in translation.
  • a rear wall 127 of the support 26 has a complementary coaxial passage 128 also ensuring the guiding in translation of the sleeve 100.
  • the traction device 28 further comprises a locking nut 130 associated with a lock nut 132 screwed to the end of the tie rod 18 beyond the sleeve 100.
  • the nut and the lock nut form a sleeve locking stop on the tie rod 18.
  • the traction device 36 is similar to the device 28, the fork extending the cylinder rod 42. However, the device 36 is mounted turned 180 ° relative to the axis of the tie rod.
  • the two forms are placed face to face, for example using a crane.
  • An operator then introduces the tie rods 18 and 20 from the rear of the second section 12 through the sleeves 100.
  • Tubular spacers 134, 136 are then interposed between the forms at the level of the passages of the tie rods. These spacers have lengths corresponding to the desired interval between the forms.
  • the operator then pushes the tie rods 18, 20, through the spacers until their first ends penetrate the passages 64 of the one-way locking devices.
  • the spacing of the half-nuts allows the passage of the tie rod 18, as shown in FIG. 5.
  • the tie rod can thus be put in place, without it being necessary to screw the latter in the two half-nuts.
  • the tie rod is pushed in until the nuts 130, 132, previously arranged at the other end of the tie rod, come into contact with the sleeve 100.
  • the tie rod 20 is mounted and immobilized in a similar manner.
  • the operator actuates the hydraulic cylinder with two rods, using the hand pump, in order to cause the simultaneous exit of the cylinder rods.
  • the fork 118 acts on the cam follower 104C, 106C, forming a reaction, by means of the cam surface in two parts 110, 112.
  • the sleeve 100 moves horizontally relative to the panel 12 and bears against the nut 130 screwed onto the tie rod.
  • the sleeve 100 blocked by the nut 130, cannot move relative to the ground, so that the second section 12 approaches the first section 10 by sliding one or other of the formwork on the ground.
  • the simultaneous action of the upper 28 and lower 36 traction devices ensures a bringing together of the two forms which remain continuously parallel.
  • the spacers 134, 136 are in contact respectively with the front walls of the supports 22, 26 and the formwork surfaces 16. They are thus kept tight at a distance determined by the length of the spacers.
  • the nuts 130 and the locknuts 132 are removed in order to release the tie rods.
  • the latter are then extracted from the locking devices by unscrewing.
  • the tie rod 18 can indeed be unscrewed by rotation, the two half-nuts 52, 54 together defining a conduit provided internally with a thread complementary to that of the thread of the tie rod 18. The formwork thus separated are then removed.
  • the cylinder After dismantling the tie rods, the cylinder should be retracted for later use.
  • Such an arrangement allows easy adjustment of the spacing of the formwork without the need for an operator to be placed behind one of the formwork during the approximation and tightening.

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)
  • Moulds, Cores, Or Mandrels (AREA)
EP97400018A 1996-01-08 1997-01-06 Schaltafel mit automatischer Spannvorrichtung Withdrawn EP0783065A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9600137A FR2743381B1 (fr) 1996-01-08 1996-01-08 Coffrage a banches muni d'un dispositif de serrage automatique des banches
FR9600137 1996-01-08

Publications (1)

Publication Number Publication Date
EP0783065A1 true EP0783065A1 (de) 1997-07-09

Family

ID=9487952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400018A Withdrawn EP0783065A1 (de) 1996-01-08 1997-01-06 Schaltafel mit automatischer Spannvorrichtung

Country Status (2)

Country Link
EP (1) EP0783065A1 (de)
FR (1) FR2743381B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2808040A1 (fr) * 2000-04-21 2001-10-26 Outinord St Amand Dispositif de maintien de deux banches en vis a vis et banche pourvue de ladite entretoise
ES2264297A1 (es) * 2003-05-26 2006-12-16 Ingenieria De Encofrados Y Servicios, S.L. Dispositivo para la union rapida de vigas de soporte de paneles de encofrado.
EP1854941A2 (de) * 2006-05-10 2007-11-14 Robusta-Gaukel GmbH & Co.KG Spannvorrichtung für Ankerstäbe von Betonschalungen
CN107175753A (zh) * 2017-06-02 2017-09-19 西安华道电机有限公司 一种带自动锁紧机构的混凝土预制梁钢模板
CN113374252A (zh) * 2021-05-28 2021-09-10 中国二十冶集团有限公司 一种建筑工程模板的连接锁紧装置
CN114109039A (zh) * 2021-12-10 2022-03-01 广东天凛高新科技有限公司 一种基于nfc无源控制的模具紧固装置及模具紧固方法
CN114718304A (zh) * 2022-04-11 2022-07-08 洛阳理工学院 一种用于建筑模板连接的安全锁紧装置
CN114856186A (zh) * 2022-04-02 2022-08-05 广东天凛高新科技有限公司 一种模板快速定位锁紧和拆卸的对拉装置及其应用方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3464666A (en) * 1967-06-05 1969-09-02 Chester I Williams Mechanism for securing forms from a position of safety
FR2649455A1 (fr) * 1989-07-10 1991-01-11 Jouve Daniel Ecrou rapide
DE9415690U1 (de) * 1994-09-28 1994-11-24 Doellen Heinz Von Spanneinrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3464666A (en) * 1967-06-05 1969-09-02 Chester I Williams Mechanism for securing forms from a position of safety
FR2649455A1 (fr) * 1989-07-10 1991-01-11 Jouve Daniel Ecrou rapide
DE9415690U1 (de) * 1994-09-28 1994-11-24 Doellen Heinz Von Spanneinrichtung

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2808040A1 (fr) * 2000-04-21 2001-10-26 Outinord St Amand Dispositif de maintien de deux banches en vis a vis et banche pourvue de ladite entretoise
ES2264297A1 (es) * 2003-05-26 2006-12-16 Ingenieria De Encofrados Y Servicios, S.L. Dispositivo para la union rapida de vigas de soporte de paneles de encofrado.
EP1854941A2 (de) * 2006-05-10 2007-11-14 Robusta-Gaukel GmbH & Co.KG Spannvorrichtung für Ankerstäbe von Betonschalungen
EP1854941A3 (de) * 2006-05-10 2008-06-04 Robusta-Gaukel GmbH & Co.KG Spannvorrichtung für Ankerstäbe von Betonschalungen
CN107175753A (zh) * 2017-06-02 2017-09-19 西安华道电机有限公司 一种带自动锁紧机构的混凝土预制梁钢模板
CN107175753B (zh) * 2017-06-02 2023-09-26 西安华道电机有限公司 一种带自动锁紧机构的混凝土预制梁钢模板
CN113374252A (zh) * 2021-05-28 2021-09-10 中国二十冶集团有限公司 一种建筑工程模板的连接锁紧装置
CN113374252B (zh) * 2021-05-28 2023-08-08 中国二十冶集团有限公司 一种建筑工程模板的连接锁紧装置
CN114109039A (zh) * 2021-12-10 2022-03-01 广东天凛高新科技有限公司 一种基于nfc无源控制的模具紧固装置及模具紧固方法
CN114856186A (zh) * 2022-04-02 2022-08-05 广东天凛高新科技有限公司 一种模板快速定位锁紧和拆卸的对拉装置及其应用方法
CN114856186B (zh) * 2022-04-02 2024-03-19 广东天凛高新科技有限公司 一种模板快速定位锁紧和拆卸的对拉装置及其应用方法
CN114718304A (zh) * 2022-04-11 2022-07-08 洛阳理工学院 一种用于建筑模板连接的安全锁紧装置

Also Published As

Publication number Publication date
FR2743381B1 (fr) 1998-03-20
FR2743381A1 (fr) 1997-07-11

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