EP0385870B1 - Connecting device for maintaining the angle between two elements connected by a hinge - Google Patents

Connecting device for maintaining the angle between two elements connected by a hinge Download PDF

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Publication number
EP0385870B1
EP0385870B1 EP90400571A EP90400571A EP0385870B1 EP 0385870 B1 EP0385870 B1 EP 0385870B1 EP 90400571 A EP90400571 A EP 90400571A EP 90400571 A EP90400571 A EP 90400571A EP 0385870 B1 EP0385870 B1 EP 0385870B1
Authority
EP
European Patent Office
Prior art keywords
slider
bar
arrangement according
notch
connecting bar
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
Application number
EP90400571A
Other languages
German (de)
French (fr)
Other versions
EP0385870A1 (en
Inventor
Jacques Meynier
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.)
Tubesca SA France
Original Assignee
Tubesca SA France
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 Tubesca SA France filed Critical Tubesca SA France
Priority to AT90400571T priority Critical patent/ATE70886T1/en
Publication of EP0385870A1 publication Critical patent/EP0385870A1/en
Application granted granted Critical
Publication of EP0385870B1 publication Critical patent/EP0385870B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders

Definitions

  • the aim of the present invention is to remedy these drawbacks and to this end relates to a connecting device intended to make the angle formed by two elements connected by a pivot undeformable, said device being characterized in that said connecting bar is provided with its free end of a transverse notch allowing the attachment of the bar on a male part projecting from the other element, and in that on the connecting bar is mounted a slide having at one of its ends a notch which, when the slide is moved towards the free end of the bar, comes into engagement with said male part, thus preventing the bar from being raised.
  • said notch is constituted by a notch which extends in the direction perpendicular to the notch of the connecting bar.
  • the slider has a cutout over the entire upper part of its end, and has a spout at the lower part of said end which, when the slider is in its locked position, opposes movement towards the top of the link bar.
  • the slide is pierced with an elongated light extending in the longitudinal direction and in which is included a projecting element integral with the connecting bar, for example a screw, a bolt, a rivet or a boss obtained by deformation of the material of the bar.
  • a projecting element integral with the connecting bar for example a screw, a bolt, a rivet or a boss obtained by deformation of the material of the bar.
  • the double ladder comprises two planes 10, 12 articulated at their upper end by a pivot 14.
  • a connecting bar 16 articulated at 18, by one end, on one of the planes.
  • the link bar is shown in Figure 2 as a flat strip, but it can have any other shape of section, for example square or round.
  • the connecting bar On its lower edge and in the vicinity of its free end, the connecting bar is provided with a notch 20 with a concavity facing downwards. Once the planes open at their normal angle of use, they are immobilized by lowering the connecting bar so that the notch 20 hooks onto a male part 22 fixed on the other element 12.
  • the male part 22 can be formed by a rivet fixed in the wall thickness of the upright 12, but it can also be formed by any equivalent mechanical means.
  • a tubular slide 24 of the same inner section as the bar is fitted on the connecting bar.
  • the slide is notched at the end of its two parallel walls which are in contact with the flat faces of the bar, on the side of the notch 20, of notches 26 extending in the longitudinal direction of the connecting bar.
  • the notches 20 and 26 intersect, defining between them a passage of section slightly greater than that of the rivet 22.
  • the bar 16 is hooked onto the rivet, then the slide 24 is slid to the right in FIG. 2 until its notches 26 grip the rivet.
  • the link bar can no longer be raised accidentally.
  • the stroke of the slider is limited by a piece 28 integral with the connecting bar and which projects through an elongated opening 30 pierced in the slider.
  • the slide of Figure 4 differs from that of Figure 2 by the fact that it has at its end near the notch 20, over its entire upper part, a cutout 38 which defines on the lower part of the slide a beak 40. It is clear that when the slide is in its locked position, the male part is both in the notch 20 and in abutment in the angle formed between the cutout 38 and the spout 40. The latter is opposed to the upward movement of the connecting bar 16.
  • the slide 24 has at the entrance of its notches 26 one or two notches 32 which slightly narrow the width of said notches. To pass the redents on the rivet 22, the slide must be slightly forced. Accidental return of the slide to its unlocked position is absolutely impossible.
  • the slider can integrate on its outer wall reliefs 34 which allow a good grip and facilitate the movement of the slider on the connecting bar.
  • Such reliefs can also be formed on the slides of FIGS. 2 and 4.

Landscapes

  • Ladders (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Golf Clubs (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Joints Allowing Movement (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Agricultural Machines (AREA)

Abstract

The device is of the type comprising a connecting bar (16) articulated at one end on one of the elements (10). The said connecting bar is provided at its free end with a transverse groove (20) allowing the attachment of the bar to a male part (22) protruding from the other element (12). On the connecting bar there is fitted a slider (24) having at one of its ends a notch which, when the slider is displaced towards the free end of the bar, engages with the said male part, thus preventing the bar from being raised. The invention is applied in particular to stepladders. <IMAGE>

Description

De nombreux ustensiles ou outils utilisés dans la vie courante sont constitués de deux éléments reliés entre eux par un pivot, ces deux éléments formant ainsi un compas d'angle variable. Cette configuration se rencontre par exemple, dans les échelles doubles à deux plans de montée ou à un plan de montée et un plan de soutien.Many utensils or tools used in everyday life consist of two elements linked together by a pivot, these two elements thus forming a variable angle compass. This configuration is encountered, for example, in double ladders with two climb planes or with a climb plan and a support plane.

Lorsque l'on a réglé l'angle formé par les deux éléments à l'ouverture voulue, il est indispensable de le rendre indéformable au moins pendant la période d'utilisation.When the angle formed by the two elements has been adjusted to the desired opening, it is essential to make it non-deformable at least during the period of use.

Il est connu de maintenir les deux éléments dans leur position relative choisie, en les reliant par une barre de liaison, articulée à une extrémité sur l'un des éléments, l'autre extrémité étant généralement conformée en crochet, apte à venir chevaucher une pièce mâle fixée sur l'autre élément. Lorsque les deux éléments sont entretoisés par la barre de liaison, l'angle qu'ils forment ne peut être varié. Des exemples d'éléments de ce type sont décrits dans les brevets FR-A-2391349, GB-A-887733, US-A-4524847, DE-A-3104981 et US-A-3912043.It is known to keep the two elements in their chosen relative position, by connecting them by a connecting bar, articulated at one end on one of the elements, the other end generally being shaped as a hook, capable of overlapping a part. male attached to the other element. When the two elements are braced by the connecting bar, the angle they form cannot be varied. Examples of elements of this type are described in patents FR-A-2391349, GB-A-887733, US-A-4524847, DE-A-3104981 and US-A-3912043.

Pour éviter une déconnexion accidentelle de la barre et de la pièce mâle, il est connu d'utiliser divers moyens de verrouillage, tels qu'un verrou en forme de virgule, monté pivotant et passant sous la pièce mâle, ou une vis et un écrou à oreilles ou encore une découpe spéciale en forme de baïonnette. Mais tous ces moyens présentent plusieurs défauts, tels qu'un manque notoire d'esthétique, un coût relativement élevé, une mise en oeuvre difficile, un manque de fiabilité et de rigidité, etc...To avoid accidental disconnection of the bar and the male part, it is known to use various locking means, such as a comma-shaped lock, pivotally mounted and passing under the male part, or a screw and a nut. with ears or a special bayonet cutout. But all these means have several defects, such as a notorious lack of aesthetics, a relatively high cost, difficult implementation, a lack of reliability and rigidity, etc.

La présente invention a pour but de remédier à ces inconvénients et concerne à cet effet un dispositif de liaison destiné à rendre indéformable l'angle formé par deux éléments reliés par un pivot, ledit dispositif étant caractérisé en ce que ladite barre de liaison est pourvue à son extrémité libre d'une encoche transversale permettant l'accrochage de la barre sur une pièce mâle faisant saillie sur l'autre élément, et en ce que sur la barre de liaison est monté un coulisseau présentant à l'une de ses extrémités une entaille qui, lorsque le coulisseau est déplacé vers l'extrémité libre de la barre, vient en prise avec ladite pièce mâle, empêchant ainsi de soulever la barre.The aim of the present invention is to remedy these drawbacks and to this end relates to a connecting device intended to make the angle formed by two elements connected by a pivot undeformable, said device being characterized in that said connecting bar is provided with its free end of a transverse notch allowing the attachment of the bar on a male part projecting from the other element, and in that on the connecting bar is mounted a slide having at one of its ends a notch which, when the slide is moved towards the free end of the bar, comes into engagement with said male part, thus preventing the bar from being raised.

Selon un premier mode de réalisation particulier, ladite entaille est constituée par une encoche qui s'étend dans le sens perpendiculaire à l'encoche de la barre de liaison.According to a first particular embodiment, said notch is constituted by a notch which extends in the direction perpendicular to the notch of the connecting bar.

Dans un deuxième mode de réalisation, le coulisseau comporte une découpe sur toute la partie supérieure de son extrémité, et présente à la partie inférieure de ladite extrémité un bec qui, lorsque le coulisseau est dans sa position verrouillée, s'oppose au mouvement vers le haut de la barre de liaison.In a second embodiment, the slider has a cutout over the entire upper part of its end, and has a spout at the lower part of said end which, when the slider is in its locked position, opposes movement towards the top of the link bar.

Le déplacement du coulisseau est limité par tout moyen de butée approprié. Selon un mode de réalisation particulier, le coulisseau est percé d'une lumière allongée s'étendant dans le sens longitudinal et dans laquelle est inclus un élément saillant solidaire de la barre de liaison, par exemple une vis, un boulon, un rivet ou un bossage obtenu par déformation de la matière de la barre.The movement of the slide is limited by any appropriate stop means. According to a particular embodiment, the slide is pierced with an elongated light extending in the longitudinal direction and in which is included a projecting element integral with the connecting bar, for example a screw, a bolt, a rivet or a boss obtained by deformation of the material of the bar.

Pour éviter un retour inopiné du coulisseau, celui-ci peut présenter à l'entrée de son encoche au moins un redent qui constitue un point de passage résistant sur la pièce mâle.To avoid an unexpected return of the slide, it can present at the entry of its notch at least one redent which constitutes a resistant passage point on the male part.

Un mode de réalisation particulier de l'invention sera décrit à présent en regard du dessin annexé dans lequel:

  • La figure 1 est une vue en élévation représentant une échelle double munie d'un dispositif de liaison, en position verrouillée;
  • La figure 2 représente à plus grande échelle et en perspective, le dispositif de liaison en position déverrouillée;
  • La figure 3 est une vue en coupe suivant la ligne III-III de la figure 1;
  • La figure 4 est une vue analogue à la figure 2 et montrant une autre variante de réalisation du coulisseau; et
  • La figure 5 est une vue en élévation d'une autre variante de réalisation du coulisseau.
A particular embodiment of the invention will now be described with reference to the appended drawing in which:
  • Figure 1 is an elevational view showing a double ladder provided with a connecting device, in the locked position;
  • Figure 2 shows on a larger scale and in perspective, the connecting device in the unlocked position;
  • Figure 3 is a sectional view along line III-III of Figure 1;
  • Figure 4 is a view similar to Figure 2 and showing another alternative embodiment of the slide; and
  • Figure 5 is an elevational view of another alternative embodiment of the slide.

La description qui va suivre sera faite à propos d'une échelle double, mais il va de soi qu'elle s'applique sans modification à tout outil ou ustensile formé de deux éléments articulés entre eux par un pivot et dont on veut rendre indéformable l'angle d'ouverture.The description which follows will be made with regard to a double scale, but it goes without saying that it applies without modification to any tool or utensil formed from two elements articulated together by a pivot and which we want to make indeformable l 'opening angle.

L'échelle double comprend deux plans 10, 12 articulés à leur extrémité supérieure par un pivot 14. Pour immobiliser les deux plans dans leur angle d'ouverture choisi, on utilise de façon connue en soi, une barre de liaison 16 articulée en 18, par une extrémité, sur l'un des plans.The double ladder comprises two planes 10, 12 articulated at their upper end by a pivot 14. To immobilize the two planes in their chosen opening angle, use is made in a manner known per se, of a connecting bar 16 articulated at 18, by one end, on one of the planes.

La barre de liaison est représentée à la figure 2 sous forme de réglette plate, mais elle peut avoir toute autre forme de section, par exemple carrée ou ronde.The link bar is shown in Figure 2 as a flat strip, but it can have any other shape of section, for example square or round.

Sur son chant inférieur et au voisinage de son extrémité libre, la barre de liaison est pourvue d'une encoche 20 à concavité tournée vers le bas. Une fois les plans ouverts à leur angle normal d'utilisation, on les immobilise en abaissant la barre de liaison pour que l'encoche 20 s'accroche sur une pièce mâle 22 fixée sur l'autre élément 12. Comme le monte la figure 3, la pièce mâle 22 peut être constituée par un rivet fixé dans l'épaisseur de paroi du montant 12, mais elle peut aussi bien être constituée par tout moyen mécanique équivalent.On its lower edge and in the vicinity of its free end, the connecting bar is provided with a notch 20 with a concavity facing downwards. Once the planes open at their normal angle of use, they are immobilized by lowering the connecting bar so that the notch 20 hooks onto a male part 22 fixed on the other element 12. As shown in FIG. 3 , the male part 22 can be formed by a rivet fixed in the wall thickness of the upright 12, but it can also be formed by any equivalent mechanical means.

Conformément à l'invention, sur la barre de liaison est emmanché un coulisseau tubulaire 24 de même section intérieure que la barre. Le coulisseau est entaillé à l'extrémité de ses deux parois parallèles qui sont en contact avec les faces plates de la barre, du côté de l'encoche 20, d'encoches 26 s'étendant dans le sens longitudinal de la barre de liaison. Lorsque la coulisseau est poussé vers la droite sur la figure 2, les encoches 20 et 26 se croisent, définissant entre elles un passage de section légèrement supérieur à celle du rivet 22.According to the invention, on the connecting bar is fitted a tubular slide 24 of the same inner section as the bar. The slide is notched at the end of its two parallel walls which are in contact with the flat faces of the bar, on the side of the notch 20, of notches 26 extending in the longitudinal direction of the connecting bar. When the slide is pushed to the right in FIG. 2, the notches 20 and 26 intersect, defining between them a passage of section slightly greater than that of the rivet 22.

Pour solidariser entre eux les plans 10, 12, on accroche la barre 16 sur le rivet, puis on fait glisser le coulisseau 24 vers la droite sur la figure 2 jusqu'à ce que ses encoches 26 enserrent le rivet. La barre de liaison ne peut plus alors être soulevée accidentellement. Pour déconnecter les plans 10, 12 on commence par déplacer le coulisseau vers la gauche sur la figure 1, puis on soulève la barre de liaison. Les deux plans peuvent alors être repliés l'un sur l'autre.To secure the planes 10, 12 together, the bar 16 is hooked onto the rivet, then the slide 24 is slid to the right in FIG. 2 until its notches 26 grip the rivet. The link bar can no longer be raised accidentally. To disconnect the planes 10, 12, we first move the slide to the left in Figure 1, then lift the link bar. The two planes can then be folded over each other.

La course du coulisseau est limitée par une pièce 28 solidaire de la barre de liaison et qui fait saillie à travers une lumière allongée 30 percée dans le coulisseau.The stroke of the slider is limited by a piece 28 integral with the connecting bar and which projects through an elongated opening 30 pierced in the slider.

Le coulisseau de la figure 4 se distingue de celui de la figure 2 par le fait qu'il comporte à son extrémité voisine de l'encoche 20, sur toute sa partie supérieure, une découpe 38 qui définit sur la partie inférieure du coulisseau un bec 40. Il est clair que lorsque le coulisseau est dans sa position verrouillée, la pièce mâle se trouve à la fois dans l'encoche 20 et en butée dans l'angle formé entre la découpe 38 et le bec 40. Ce dernier s'oppose au mouvement vers le haut de la barre de liaison 16.The slide of Figure 4 differs from that of Figure 2 by the fact that it has at its end near the notch 20, over its entire upper part, a cutout 38 which defines on the lower part of the slide a beak 40. It is clear that when the slide is in its locked position, the male part is both in the notch 20 and in abutment in the angle formed between the cutout 38 and the spout 40. The latter is opposed to the upward movement of the connecting bar 16.

Dans le mode de réalisation représenté à la figure 5, le coulisseau 24 présente à l'entrée de ses encoches 26 un ou deux redents 32 qui rétrécissent légèrement la largeur desdites encoches. Pour faire passer les redents sur le rivet 22, on doit forcer légèrement le coulisseau. Un retour accidentel du coulisseau vers sa position déverrouillée est absolument impossible.In the embodiment shown in Figure 5, the slide 24 has at the entrance of its notches 26 one or two notches 32 which slightly narrow the width of said notches. To pass the redents on the rivet 22, the slide must be slightly forced. Accidental return of the slide to its unlocked position is absolutely impossible.

Comme le montre la figure 4, le coulisseau peut intégrer sur sa paroi extérieure des reliefs 34 qui permettent une bonne préhension et facilitent le mouvement du coulisseau sur la barre de liaison. De tels reliefs peuvent également être formés sur les coulisseaux des figures 2 et 4.As shown in Figure 4, the slider can integrate on its outer wall reliefs 34 which allow a good grip and facilitate the movement of the slider on the connecting bar. Such reliefs can also be formed on the slides of FIGS. 2 and 4.

Claims (7)

1. A connecting arrangement intended to maintain the angle formed by two elements (10, 12) which are connected by a pivot (14), of the type comprising a connecting bar (16) which is pivotally mounted at one end to one of the elements (10), and characterised in that said connecting bar (16) is provided at its free end with a transverse notch (20) permitting the bar (16) to be hooked on to a male member (22) projecting from the other element (12) and that mounted on the connecting bar (16) is a slider (24) having at one of its ends a recess (26; 38) which, when the slider (24) is displaced towards the free end of the bar (16), comes into engagement with said male member (22), thus preventing the bar (16) from being lifted.
2. A connecting arrangement according to claim 1 characterised in that the slider is tubular and is recessed at its end which is disposed towards the notch (20) in the connecting bar, with notches (26) which are so dimensioned that, when it is moved into its locking position, its notches (26) and the notch (20) in the connecting arm cross, defining between them a passage of a section which is slightly greater than that of the male member (22).
3. A connecting arrangement according to claim 1 characterised in that the slider comprises a cut-out (38) over the whole of the upper part of its end and at the lower part of said end has a projection (40) which, when the slider is in its locked position, resists upward movement of the connecting bar.
4. A connecting arrangement according to claim 1 chacterised in that displacement of the slider is limited by any suitable abutment means (28).
5. A connecting arrangement according to claim 4 characterised in that the slider (24) has an elongate opening (30) therethrough, which extends in the longitudinal direction and in which there is contained a projecting element (28) which is fixed with respect to the connecting bar, for example a screw, a bolt, a rivet or a boss configuration produced by deformation of the material of the bar.
6. A connecting arrangement according to claim 2 characterised in that at the entrance of its notch (26) the slider has at least one step (32) which constitutes a point of resistance to the movement of the male member (22) therepast.
7. A connecting arrangement according to one of the preceding claims characterised in that on its outside wall the slider has relief portions (34) which give a good grip on the slider.
EP90400571A 1989-03-02 1990-03-01 Connecting device for maintaining the angle between two elements connected by a hinge Expired - Lifetime EP0385870B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90400571T ATE70886T1 (en) 1989-03-02 1990-03-01 CONNECTING DEVICE FOR MAINTAINING THE ANGLE BETWEEN TWO ELEMENTS CONNECTED BY A JOINT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8902701 1989-03-02
FR8902701A FR2643949B1 (en) 1989-03-02 1989-03-02 CONNECTING DEVICE FOR MAKING THE ANGLE FORMED BY TWO ELEMENTS CONNECTED BY A PIVOT

Publications (2)

Publication Number Publication Date
EP0385870A1 EP0385870A1 (en) 1990-09-05
EP0385870B1 true EP0385870B1 (en) 1991-12-27

Family

ID=9379275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90400571A Expired - Lifetime EP0385870B1 (en) 1989-03-02 1990-03-01 Connecting device for maintaining the angle between two elements connected by a hinge

Country Status (5)

Country Link
EP (1) EP0385870B1 (en)
AT (1) ATE70886T1 (en)
DE (1) DE69000007D1 (en)
ES (1) ES2028489T3 (en)
FR (1) FR2643949B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102478302B1 (en) * 2022-05-24 2022-12-16 최돈 Garlic Harvest Packaging Machine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19517182C2 (en) * 1995-05-11 2000-12-14 Loh Kg Hailo Werk Vertical ladder
US6206462B1 (en) * 2000-04-17 2001-03-27 Ming-Tai Huang Pinch preventing mechanism for a collapsible chair
TWM495421U (en) * 2014-11-13 2015-02-11 yong-de Lin Primary-secondary complex type A-shaped ladder
CN106837156B (en) * 2017-03-28 2018-12-21 宁夏平罗县贸易有限责任公司 A kind of supermarket's detachable ladder for being convenient for carrying and storing
EP3480418A1 (en) * 2017-11-07 2019-05-08 Wan Yu Chen Mechanical structure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB887733A (en) * 1959-01-27 1962-01-24 George Shaw Crossley Improvements in ladders
US3912043A (en) * 1974-08-19 1975-10-14 James N Brannan Pivoted extension ladder
FR2391349A1 (en) * 1977-05-16 1978-12-15 Mullca Multipurpose extending ladder hinge - has half-open components with notches to receive rungs of narrower section
DE3104981A1 (en) * 1981-02-12 1982-08-26 Krause-Werk Gmbh & Co Kg, 6320 Alsfeld Step-ladder
US4524847A (en) * 1984-02-03 1985-06-25 Daniel Mintz Ladder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102478302B1 (en) * 2022-05-24 2022-12-16 최돈 Garlic Harvest Packaging Machine

Also Published As

Publication number Publication date
FR2643949B1 (en) 1991-05-31
EP0385870A1 (en) 1990-09-05
ATE70886T1 (en) 1992-01-15
ES2028489T3 (en) 1992-07-01
FR2643949A1 (en) 1990-09-07
DE69000007D1 (en) 1992-02-06

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