EP0298263B1 - A pair of foldable trestles - Google Patents
A pair of foldable trestles Download PDFInfo
- Publication number
- EP0298263B1 EP0298263B1 EP19880109118 EP88109118A EP0298263B1 EP 0298263 B1 EP0298263 B1 EP 0298263B1 EP 19880109118 EP19880109118 EP 19880109118 EP 88109118 A EP88109118 A EP 88109118A EP 0298263 B1 EP0298263 B1 EP 0298263B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- feet
- articulated
- axis
- hinge
- trestles
- 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.)
- Expired - Lifetime
Links
- 230000000903 blocking effect Effects 0.000 description 3
- 210000002414 leg Anatomy 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/06—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby of trestle type
Definitions
- the present invention relates to a pair of foldable trestles of the type fitted with two conjugate double compasses which are arranged in a Tee.
- French patent n ° 1.246304 describing a metal trestle with retractable feet and automatic opening under the action of a spring.
- French patent n ° 2.487722 describing a folding trestle composed of two bent tubes, articulated around an axis and locking between them simultaneously with the opening.
- French patent n ° 2.291329 describing a trestle made up of a vertical frame on which are articulated struts acting as feet, kept apart by connecting rods themselves articulated.
- French patent n ° 2.220661 describes a trestle whose feet can be folded outwardly along the crosspiece.
- French patent n ° 2.418062 describing a removable trestle in separate elements.
- French patent n ° 2.395112 describing a non-folding trestle equipped with casters and able to receive a bin.
- Patent n ° 2.404722 addition to patent n ° 73.09643 describing a trestle whose feet are removable and can be fitted into boxes secured to the crosspiece.
- French patent n ° 1.504664 describes a telescopic trestle with claw.
- French patent n ° 2.454877 describes a trestle whose articulated feet wedge a crosspiece.
- US patent n ° 84/03347 describes a work easel whose feet are removable and held by straps during transport.
- French patent n ° 2.389351 describes a folding easel made up of tubular frames hinged together.
- French patent n ° 2.515242 describes a hinge for a trestle made up of two articulated frames.
- French patent n ° 2.478782 describes a removable metal trestle.
- French patent n ° 2.439931 describes a trestle whose legs are foldable.
- French patent n ° 2.221033 describes a safety hinge for a folding trestle.
- the present invention aims to bring improvements to these different models of easels, so as to facilitate their storage and transport, to simplify their deployment during installation for use and to increase their rigidity and stability in this working position.
- the first improvement obtained resides in the fact that the feet fold inside the U-shaped cross member and, therefore, completely disappear, thus producing a compact product.
- the second improvement concerns the deployment of the feet whose execution is simple and fast thanks to the combined compasses. Indeed, a blocking action exerted on the part of the compass acting as a strut makes it possible to simultaneously ensure the transverse spacing and the blocking in position of the articulated feet.
- Another improvement relates to the increase in rigidity and stability of the feet in the deployed position, this thanks to an axis serving as a stop, thereby limiting the opening of the feet and opposing the thrust exerted by the part of the compass acting of a strut.
- the transport and the storage are facilitated by a fourth improvement which makes it possible to join face to face the pair of easels, joining obtained by means of a spring coming to engage, because of its elasticity, around a pin.
- the pair of easels thus paired can be easily stored, the whole taking the form of a tube of rectangular section. Manual transport is then very easy thanks to a handle secured to a U profile wing constituting the crosspiece of one of the easels.
- FIG. 1 represents, in perspective, an easel unfolded in the position of use, composed of a cross member 1 on which are articulated around an axis 4, feet 2 and 6.
- the spacing and the rigidity of the feet are obtained by means of a double compass of which we distinguish the two parts 3 and 8 acting as locking knee pads.
- FIG. 2 represents, in perspective, the easel in the folded position with the feet 2 and 6 completely retracted inside the profile U constituting the cross member 1.
- FIG. 3 represents, in perspective, a pair of easels twinned by clipping, the assembly then constituting a product of tubular shape, the handling of which is facilitated by the grip handle 15.
- FIG. 4 and FIG. 5 represent the assembly of the feet 6 of the cross-member 1 and of the double compass 3 and 8.
- One end is articulated on the cross member 1 around an axis 16. This point of articulation is located in the axis of symmetry of the cross member 1.
- the other end of the same part 8 of the compass is articulated on an axis 17 carried by a bracket 7, itself articulated on the part 3 of the compass around the axis 18.
- part 3 of the compass articulated in its middle around the axis 18, is also at each of its ends, on the foot 6 around the axis 19 on the foot 2 around the axis 20.
- the locking and spacing of the feet 2 and 6 is obtained by exerting manual pressure, from top to bottom, in the area of the axis 21 of the part 8 of the compass (FIG. 4).
- the vertical manual pushing action on the axis 21 of the part 8 of the compass causes the deployment of said compass, simultaneously causing a reaction force of the axis 16, forcing feet 2 and 6 to pivot around the axis 4 to come into abutment on an axis 5 limiting the pivoting.
- the part 8 of the compass then arcs around its axis 21 cooperating with a stop 9, in order to obtain a blocking giving great rigidity and stability to the bridge in the working position.
- FIG. 6 represents the feet 2 and 6 articulated around the axis 4 secured to the cross-member 1.
- the legs 2 and 6 deployed take an oblique position thanks to oblong holes made in the longitudinal direction in the said feet crossed by the axis 4 ( Figure 6 A).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tables And Desks Characterized By Structural Shape (AREA)
- Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
- Pivots And Pivotal Connections (AREA)
- Non-Flushing Toilets (AREA)
- Handcart (AREA)
- Air Bags (AREA)
Description
La présente invention concerne une paire de chevalets pliables du type équipé de deux double-compas conjugués qui sont disposés en Té.The present invention relates to a pair of foldable trestles of the type fitted with two conjugate double compasses which are arranged in a Tee.
Il existe différents modèles de chevalets destinés à supporter un plan de travail, ou un objet à ouvrager.There are different models of easels intended to support a work plan, or an object to be worked.
Ces chevalets sonts constitués d'une traverse avec des pieds fixes rabattables, repliables ou démontables, afin d'en faciliter le transport dans un véhicule.These easels are made up of a crosspiece with fixed folding, folding or removable feet, in order to facilitate transport in a vehicle.
On connaît plusieurs modèles de réalisation de ce type de matériel, faisant l'objet des brevets désignés ci-après :
Brevet Français n° 1.246304 décrivant un tréteau métallique à pieds escamotables et à ouverture automatique sous l'action d'un ressort.
Brevet Français n° 2.487722 décrivant un tréteau pliant composé de deux tubes coudés, articulés autour d'un axe et se bloquant entre eux simultanément avec l'ouverture.
Brevet français n° 2.291329 décrivant un tréteau constitué d'un cadre vertical sur lequel sont articulées des contrefiches faisant office de pieds, maintenues en écartement par des biellettes elles-mêmes articulées.
Brevet Français n°2.220661 décrit un tréteau dont les pieds sont repliables extérieurement le long de la traverse.
Brevet Français n°2.418062 décrivant un tréteau démontable en éléments séparés.
Brevet Français n° 2.395112, décrivant un tréteau non repliable équipé de roulettes et pouvant recevoir un bac.
Brevet n° 2.404722, addition au brevet n° 73.09643 décrivant un tréteau dont les pieds sont démontables et peuvent être emboités dans des boitiers solidaires de la traverse.
Brevet Français n° 1.504664 décrit un tréteau télescopiques à griffe.
Brevet Français n° 2.454877 décrit un tréteau dont les pieds articulés viennent coincer une traverse.
Brevet US n° 84/03347, décrit un chevalet de travail dont les pieds sont démontables et maintenus par des sangles lors du transport.
Brevet Français n° 2.389351, décrit un chevalet pliant constitué de cadres tubulaires articulés entre eux.
Brevet Français n° 2.515242 décrit une charnière pour tréteau constitué de deux cadres articulés.
Brevet Français n° 2.478782 décrit un tréteau métallique démontable.
Brevet Français n°2.439931 décrit un tréteau dont les pieds sont rabattables.
Brevet Français n° 2.221033 décrit une charnière de sécurité pour tréteau pliant.Several models are known for producing this type of material, which are the subject of the patents designated below:
French patent n ° 1.246304 describing a metal trestle with retractable feet and automatic opening under the action of a spring.
French patent n ° 2.487722 describing a folding trestle composed of two bent tubes, articulated around an axis and locking between them simultaneously with the opening.
French patent n ° 2.291329 describing a trestle made up of a vertical frame on which are articulated struts acting as feet, kept apart by connecting rods themselves articulated.
French patent n ° 2.220661 describes a trestle whose feet can be folded outwardly along the crosspiece.
French patent n ° 2.418062 describing a removable trestle in separate elements.
French patent n ° 2.395112 , describing a non-folding trestle equipped with casters and able to receive a bin.
Patent n ° 2.404722, addition to patent n ° 73.09643 describing a trestle whose feet are removable and can be fitted into boxes secured to the crosspiece.
French patent n ° 1.504664 describes a telescopic trestle with claw.
French patent n ° 2.454877 describes a trestle whose articulated feet wedge a crosspiece.
US patent n ° 84/03347 , describes a work easel whose feet are removable and held by straps during transport.
French patent n ° 2.389351 , describes a folding easel made up of tubular frames hinged together.
French patent n ° 2.515242 describes a hinge for a trestle made up of two articulated frames.
French patent n ° 2.478782 describes a removable metal trestle.
French patent n ° 2.439931 describes a trestle whose legs are foldable.
French patent n ° 2.221033 describes a safety hinge for a folding trestle.
On connaît également d'après le brevet US-A-1 935 871 un tréteau pliable dont le déploiement des pieds est obtenu par des compas reliés entre eux par des biellettes, elles-mêmes reprises en fixation sur la traverse horizontale du tréteau.Also known from US-A-1 935 871 is a foldable trestle, the deployment of the feet of which is obtained by compasses connected together by rods, themselves taken up by fixing on the horizontal crosspiece of the trestle.
La présente invention a pour but d'apporter des perfectionnements à ces différents modèles de chevalets, de façon à faciliter leur rangement et leur transport, à simplifier leur déploiement lors de la mise en place pour utilisation et d'augmenter leur rigidité et stabilité dans cette position de travail.The present invention aims to bring improvements to these different models of easels, so as to facilitate their storage and transport, to simplify their deployment during installation for use and to increase their rigidity and stability in this working position.
La première amélioration obtenue réside dans le fait que les pieds se replient à l'intérieur de la traverse en forme de U et, par conséquent, s'effacent complètement réalisant ainsi un produit compact.The first improvement obtained resides in the fact that the feet fold inside the U-shaped cross member and, therefore, completely disappear, thus producing a compact product.
Cette amélioration est obtenue grâce à des pieds articulés sur un axe et reliés à une traverse par la conjugaison de deux compas disposés en Té. Les pieds se replient cote à cote à l'intérieur de la traverse en forme de U, opération facilitée par la position axiale des compas par rapport à la traverse et par la conception de leur mode de repliage.This improvement is obtained thanks to feet articulated on an axis and connected to a crosspiece by the combination of two compasses arranged in Tee. The feet fold side by side inside the U-shaped cross member, an operation facilitated by the axial position of the compasses relative to the cross member and by the design of their folding mode.
La deuxième amélioration concerne le déploiement des pieds dont l'exécution est simple et rapide grâce aux compas conjugués. En effet, une action de blocage exercée sur la partie de compas faisant office de jambe de force permet d'assurer simultanément l'écartement transversal et le blocage en position des pieds articulés.The second improvement concerns the deployment of the feet whose execution is simple and fast thanks to the combined compasses. Indeed, a blocking action exerted on the part of the compass acting as a strut makes it possible to simultaneously ensure the transverse spacing and the blocking in position of the articulated feet.
Une autre amélioration concerne l'augmentation de rigidité et de stabilité des pieds en position déployée, ceci grâce à un axe tenant lieu de butée, limitant ainsi l'ouverture des pieds et s'opposant à la poussée exercée par la partie du compas faisant office de jambe de force.Another improvement relates to the increase in rigidity and stability of the feet in the deployed position, this thanks to an axis serving as a stop, thereby limiting the opening of the feet and opposing the thrust exerted by the part of the compass acting of a strut.
Le transport et le rangement sont facilités par une quatrième amélioration qui permet de solidariser face à face la paire de chevalets, solidarisation obtenue au moyen d'un ressort venant s'enclencher, du fait de son élasticité, autour d'une épingle.The transport and the storage are facilitated by a fourth improvement which makes it possible to join face to face the pair of easels, joining obtained by means of a spring coming to engage, because of its elasticity, around a pin.
La paire de chevalets ainsi jumelée peut se ranger aisément, l'ensemble prenant une forme de tube de section rectangulaire. Le transport manuel se fait alors très facilement grâce à une poignée solidaire d'une aile de profilé U constituant la traverse d'un des chevalets.The pair of easels thus paired can be easily stored, the whole taking the form of a tube of rectangular section. Manual transport is then very easy thanks to a handle secured to a U profile wing constituting the crosspiece of one of the easels.
L'invention est exposée ci-après plus en détail à l'aide de dessins représentant seulement un mode d'exécution.The invention is set out below in more detail with the aid of drawings representing only one embodiment.
La figure 1 représente, en perspective, un chevalet déplié en position d'utilisation, composé d'une traverse 1 sur laquelle sont articulés autour d'un axe 4, des pieds 2 et 6.FIG. 1 represents, in perspective, an easel unfolded in the position of use, composed of a
L'écartement et la rigidité des pieds sont obtenus au moyen d'un double compas dont nous distinguons les deux parties 3 et 8 faisant fonction de genouillères de blocage.The spacing and the rigidity of the feet are obtained by means of a double compass of which we distinguish the two
La figure 2 représente, en perspective, le chevalet en position repliée avec les pieds 2 et 6 totalement escamotés à l'intérieur du profil U constituant la traverse 1.FIG. 2 represents, in perspective, the easel in the folded position with the
La figure 3 représente, en perspective, une paire de chevalets jumelés par clipsage, l'ensemble constituant alors un produit de forme tubulaire dont la manutention est facilitée par la poignée de préhension 15.FIG. 3 represents, in perspective, a pair of easels twinned by clipping, the assembly then constituting a product of tubular shape, the handling of which is facilitated by the
La figure 4 et la figure 5 représentent l'assemblage des pieds 6 de la traverse 1 et du double compas 3 et 8.FIG. 4 and FIG. 5 represent the assembly of the
Une extrémité est articulée sur la traverse 1 autour d'un axe 16. Ce point d'articulation est situé dans l'axe de symétrie de la traverse 1.One end is articulated on the
L'autre extrémité de la même partie 8 du compas est articulée sur un axe 17 porté par une équerre 7, elle-même articulée sur la partie 3 du compas autour de l'axe 18.The other end of the
Suivant figures 4 et 6, la partie 3 du compas articulé en son milieu autour de l'axe 18, l'est aussi à chacune de ses extrémités, sur le pied 6 autour de l'axe 19 sur le pied 2 autour de l'axe 20.According to Figures 4 and 6,
Le blocage et l'écartement des pieds 2 et 6 s'obtiennent en exerçant une pression manuelle, de haut en bas, dans la zone de l'axe 21 de la partie 8 du compas (figure 4).The locking and spacing of the
Cette poussée provoque le déploiement de la partie 3 du compas (figures 4 et 6) qui, par son action, par l'intermédiaire des axes 19 et 20, fait écarter les pieds 2 et 6.This thrust causes the deployment of
L'action de poussée manuelle verticale sur l'axe 21 de la partie 8 du compas provoque le déploiement du dit compas, entraînant simultanément une force de réaction de l'axe 16, obligeant les pieds 2 et 6 à pivoter autour de l'axe 4 pour venir en butée sur un axe 5 limitant le pivotement.The vertical manual pushing action on the
La partie 8 du compas s'arc-boute alors autour de son axe 21 coopérant avec une butée 9, pour obtenir un blocage conférant une grande rigidité et stabilité au chevalet en position de travail.The
La figure 6 représente les pieds 2 et 6 articulés autour de l'axe 4 solidaire de la traverse 1.FIG. 6 represents the
Les pieds 2 et 6 déployés prennent une position oblique grâce à des trous oblongs pratiqués dans le sens longitudinal dans les dits pieds traversés par l'axe 4 (figure 6 A).The
Suivant figure 7, lorsque les pieds 2 et 6 sont déployés, le ressort 13 monté sur l'axe 4 est en position dite de repos.According to Figure 7, when the
Suivant figure 8, lorsque les pieds 2 et 6 d'une paire de chevalets sont repliés et logés dans leur traverse respective 1 en forme de U, ce même ressort 13, équipant un des deux chevalets vient s'enclencher automatiquement sur une épingle 14 prévue sur l'autre chevalet. La paire de chevalets forme alors un seul bloc équipé d'une poignée 15 (voir figure 3) facilitant sa préhension et son transport.According to FIG. 8, when the
Claims (2)
- Pair of trestles each including a croospiece (1) folding, fixable legs (2 and 6) linked together at each end of the crosspiece by a hinge (3) articulated at its two ends on the legs (2 and 6) and itself linked to the crosspiece (1) by a second hinge (8), also articulated at one extremity at a point situated in the symetrical axis of the internal face of the crospiece (1) while the other end is articulated on a square attached to the hinge (3) the two hinges being arranged in a "T" and the whole hinge-leg arrangement being able to be folded away into the U-profile which makes up, the croospiece.
- Pair of trestles, following claim (1) characterized by one of the two trestles having a spring (13) which is automatically engaged onto a pin (14) fitted on the other trestle to join them simultaneously and to immobilize the hinge-leg arrangements folded away in the U-profile ot the croospiece (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8709601 | 1987-07-06 | ||
| FR8709601A FR2617944B1 (en) | 1987-07-06 | 1987-07-06 | IMPROVEMENT ON EASELS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0298263A1 EP0298263A1 (en) | 1989-01-11 |
| EP0298263B1 true EP0298263B1 (en) | 1992-05-27 |
Family
ID=9352936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19880109118 Expired - Lifetime EP0298263B1 (en) | 1987-07-06 | 1988-06-08 | A pair of foldable trestles |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0298263B1 (en) |
| DE (1) | DE3871445D1 (en) |
| ES (1) | ES2031953T3 (en) |
| FR (1) | FR2617944B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9215129D0 (en) * | 1992-07-16 | 1992-08-26 | Medical Res Council | Development relating to human immunodeficiency viruses |
| ES2365364T3 (en) * | 2008-10-07 | 2011-09-30 | Macc | PAIR OF FOLDING HORSES. |
| CN113369678B (en) * | 2021-08-12 | 2021-10-12 | 徐州达一重锻科技有限公司 | Laser cutting machine that multi-angle was adjusted |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH151740A (en) * | 1930-11-06 | 1931-12-31 | Rosenberger Joh | Collapsible trestle. |
| US1935871A (en) * | 1932-08-15 | 1933-11-21 | Earl J Coffed | Saw horse or trestle |
| US2639197A (en) * | 1950-03-11 | 1953-05-19 | James L Chelsea | Portable sawhorse |
| US2755144A (en) * | 1951-11-20 | 1956-07-17 | James D Simmons | Folding trestle |
| CH421862A (en) * | 1965-03-26 | 1966-09-30 | Mueller Wilhelm | Collapsible work trestle |
| US4046221A (en) * | 1976-03-17 | 1977-09-06 | Edenfield Neal M | Saddle support |
| US4489808A (en) * | 1983-10-24 | 1984-12-25 | Voye Bradford D | Collapsible sawhorse |
| US4640386A (en) * | 1986-02-14 | 1987-02-03 | Hall James W | Folding utility horse |
-
1987
- 1987-07-06 FR FR8709601A patent/FR2617944B1/en not_active Expired - Lifetime
-
1988
- 1988-06-08 DE DE8888109118T patent/DE3871445D1/en not_active Expired - Lifetime
- 1988-06-08 ES ES88109118T patent/ES2031953T3/en not_active Expired - Lifetime
- 1988-06-08 EP EP19880109118 patent/EP0298263B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0298263A1 (en) | 1989-01-11 |
| ES2031953T3 (en) | 1993-01-01 |
| DE3871445D1 (en) | 1992-07-02 |
| FR2617944B1 (en) | 1990-09-28 |
| FR2617944A1 (en) | 1989-01-13 |
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