EP0304457B1 - Saw trestle - Google Patents

Saw trestle Download PDF

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Publication number
EP0304457B1
EP0304457B1 EP88902153A EP88902153A EP0304457B1 EP 0304457 B1 EP0304457 B1 EP 0304457B1 EP 88902153 A EP88902153 A EP 88902153A EP 88902153 A EP88902153 A EP 88902153A EP 0304457 B1 EP0304457 B1 EP 0304457B1
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EP
European Patent Office
Prior art keywords
jaw
riser
lever
stand
fact
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EP88902153A
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German (de)
French (fr)
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EP0304457A1 (en
Inventor
Henri Plouvier
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Individual
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Individual
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Priority to AT88902153T priority Critical patent/ATE60916T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/0041—Saw benches or saw bucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B29/00—Gripping, clamping, or holding devices for the trunk or log in saw mills or sawing machines; Travelling trunk or log carriages

Definitions

  • the present invention relates to easels, that is to say the devices which make it possible to position and maintain oblong bodies such as, for example, wooden logs, branches, etc., in order to subject them to transformations which can be , for logs, cutting, and for branches, making fagots.
  • Trestles are already known for positioning and maintaining the logs for cutting them.
  • These easels are essentially constituted by two substantially planar parallelepipedic supports associated to form a piece in the shape of an "X", the two branches of which constitute, on one side the receptacle for the oblong bodies, and on the other the base making it possible to position this easel.
  • the two arms of the "X" can be pivotally mounted relative to each other to be able to fold the easel during periods of non-use, in order to minimize its size for storage.
  • easels make it possible to carry out the function for which they are designed. However, they have certain drawbacks which can cause accidents. Indeed, with such an easel, it is relatively difficult to cut a log while maintaining it correctly in the receptacle in the shape of a "V", and ensuring the stability of the easel. In addition, these easels are not perfectly designed to allow the production of fagots, especially when using a plurality of branches that it is necessary to gather and tie.
  • the object of the present invention is to overcome these drawbacks by making an easel which makes it possible to position and maintain the oblong bodies which it is intended to receive, having very good stability without requiring a fixed location on the ground, and also allowing very easy production. of sets like fagots of branches.
  • the easel shown in Figure 1 comprises a foot 1 consisting of a base 2 formed of tubes 3, 4, ... assembled together to the others so as to form a support polygon 5 of given surface which, in the illustrated embodiment, is a rectangular surface.
  • a support polygon 5 of given surface which, in the illustrated embodiment, is a rectangular surface.
  • On one side 6 of the base 2 is fixed an upright 7 formed by a tubular frame 8.
  • the height of this frame is substantially of the order of a meter, although this value is given only for information, because it can be defined for each type of use or possible application of this easel.
  • a first jaw 10 is fixed which advantageously takes the form of a substantially cylindrical surface 11, the concavity 12 of which is turned towards the outside 13 of the vertical volume 50 enveloping the base 2 and going through the amount 7.
  • the first jaw 10 is formed of a plurality of regularly spaced teeth 14, 15, 16 defining in fact the cylindrical grip surface 11 defined above.
  • a jaw made by a plurality of regularly spaced teeth allows a better grip of oblong objects whose shapes are not always uniform, but may have irregularities, such as the case of logs or branches .
  • the first jaw 10 is fixedly fixed to the top bar 9 of the upright 7.
  • this jaw 10 can be associated with this upright by adjustable fixing means, in order to be able to adapt the orientation of his teeth.
  • this first jaw 10 is associated a second jaw 20 itself advantageously formed of another plurality of teeth 21, 22, 23, of identical shape to that of the teeth 14, 15, 16 described above.
  • this second jaw 20 is pivotally mounted about an axis 24, so that it can pivot relative to the first jaw 10 and therefore relative to the upright 7.
  • This axis of rotation 24 is therefore substantially contained at the same time in the two cylindrical surfaces defining the two jaws 10 and 29 which have opposite concavities, so that the concavity 25 of the second jaw 20 is turned towards the inside 26 of the enveloping volume passing through the base 2 and the upright 7.
  • the different teeth 21, 22, 23 of the second jaw 20 are integral with a shaft, or a plurality of shafts 27, mounted on bearings 28 integral with the top bar of the upright 7.
  • the different teeth 21-23 of this second jaw are secured to each other, for example by a longitudinal cross member 29 which is integral with extensions 30, 31, 32 of these teeth, so that a force applied to this cross member 29 making it undergo a rotational movement is uniformly transmitted to the set of teeth 21-23 of the second jaw 20, so that one can either bring these teeth closer to teeth 14-16, or move them away, as is will be explained below.
  • a lever 40 is secured to the cross member 29 while being arranged so that it is contained in the enveloping volume 50 described above.
  • the end 41 of this lever 40 has its projection, in the direction perpendicular to the plane of the base, contained in this base 2.
  • the length of this lever 40 is sufficient for the end piece 42 fixed at its end 41 is located at a relatively small distance from the base 2.
  • Figure 2 shows the use of the easel for cutting a log 60.
  • This log is positioned between the two jaws 10 and 20 when they are far enough apart to allow its introduction, that is to say when the lever 40 is in a "high" position shown in dotted lines 40 ⁇ .
  • the log 60 therefore resting on the teeth 14-16 and 21-23 of the two jaws, the user 61 of the bridge places one of his feet 62 on the base 2 and the other 63 on the end piece 42 of the lever 40, to tend to lower this lever 40 towards the base 2 and constantly exert on it a force 64 oriented towards the base.
  • the lever is first placed in the "high" position 40 ⁇ allowing to move the two jaws as far as possible.
  • the branches are then accumulated and piled up in the receptacle which is wide open.
  • the lever is then lowered by the action of force 64, as described above.
  • the branches are therefore packed and it is advantageous to bind them in different places along their length.
  • the user still maintaining the base by his foot 62 and the mass of branches by means of the lever 40 transmitting to the jaw 20 the force 64 exerted by his other foot 63, is very easy to execute, always at two hands, the cut of the bundles which are thus formed of a dense and homogeneous mass of branches, and already all linked.
  • the easel further comprises lockable-unlockable means 70 which can cooperate between the lever 40 and the amount 7 .
  • these lockable-unlockable means consist of a rack 71 mounted between the lever 40 and at least one part integral with the upright 7, that is to say bars 8, 9 constituting this upright 7.
  • the rack comprises a portion of crown 72 comprising stop notches 73 on at least one of its sides 74, these notches having substantially the shape of a toothing delimited by two flanks, the one steep 75 and the other with a slight slope 76.
  • This ring portion 72 is pivotally mounted about an axis 77 integral with the lever 40 so as to be able to undergo a certain rotation such as that illustrated by the arrow 78.
  • means 80 are mounted like a spring making it possible to apply an elastic force which, in the example illustrated, is a force which exerts a traction on the end 79 of this crown to tend to rotate it in a senestrorsum 81 direction.
  • a stop lug 82 positioned fixedly with respect to this upright and of a shape complementary to that of a notch 73 delimited between two teeth, that is to say between the relatively gentle slope of one tooth and the steep flank of the next tooth.
  • the spring 80 acts on the crown portion so that the flanks 75, 76 of the teeth abut against this lug, and thus prevent the crown from being able to undergo a movement allowing the lever 40 to pivot in the dextrorsum direction.
  • the end 79 of this portion of the crown located near the lever 40 includes manipulation means, for example a handle, 83, so as to be able, when necessary, to subject this crown to a dextrorsum rotation , in particular to release it from the stop lug 82.
  • the easel made according to Figure 3 is used as follows.
  • the two jaws 10 and 20 being completely open form a receptacle in which are placed, for example as illustrated, branches 90, in order to make bundles.
  • branches 90 When the receptacle is sufficiently filled, one acts on the lever 40 to make it undergo a senestrorsum rotation, in order to bring the two jaws 10 and 20 together.
  • the crown portion 72 slides on the lug 82 which jumps, in a relative movement, the teeth one after the other.
  • the branches are sufficiently compacted to form a compact bundle, the position of the lug on the ring gear makes it possible to keep the two jaws 10 and 20 tight, without the user needing to keep his foot on the lever 40.
  • branches can then be tied by passing links between the teeth of the jaws, then cut if necessary.
  • the dimensions of the base 2 can be, of course, slightly enlarged compared to those corresponding to the embodiment illustrated in Figures 1 and 2. The stability of the device will only be better.

Abstract

PCT No. PCT/FR88/00108 Sec. 371 Date Nov. 8, 1988 Sec. 102(e) Date Nov. 8, 1988 PCT Filed Feb. 26, 1988 PCT Pub. No. WO88/06957 PCT Pub. Date Sep. 22, 1988.A rack, in particular for making up faggots, cutting logs, etc., characterized by the fact that it comprises: a stand (1) defining a supporting polygon (5) suitable for taking position on the ground; a riser (7) fixed to said stand and occupying a plane substantially perpendicular thereto, said riser being situated substantially on one side of said stand; a first jaw (10), said first jaw being substantially in the form of a concave cylinder, with its concave side facing out from a vertical volume (50) extending over said stand and passing through said riser; means (9, 28) for mounting said first jaw on said riser; a second jaw (20), said second jaw being substantially in the form of a concave cylinder; means for mounting said second jaw to rotate about an axis (24) relative to said first jaw (10) such that said axis of rotation lies substantially in the intersection between the two cylindrical surfaces of each of said jaws, and that the two jaws occupy positions relative to each other such that their concave faces face eath other; and a lever (40, 42) fixed to said second jaw, in such a manner as to be contained within said vertical volume (50). The invention is particularly applicable to cutting up logs and to making up faggots.

Description

La présente invention concerne les chevalets, c'est-à-dire les dispositifs qui permettent de positionner et maintenir des corps oblongs comme, par exemple, des bûches de bois, des branchages, etc, afin de leur faire subir des transformations qui peuvent être, pour les bûches, de la découpe, et pour les branchages, la réalisation de fagots.The present invention relates to easels, that is to say the devices which make it possible to position and maintain oblong bodies such as, for example, wooden logs, branches, etc., in order to subject them to transformations which can be , for logs, cutting, and for branches, making fagots.

On connaît déjà des chevalets permettant le positionnement et le maintien des bûches pour leur découpe. Ces chevalets sont essentiel­lement constitués par deux supports parallélépipédiques sensiblement plans associés pour former un pièce en forme de "X" dont les deux branches constituent, d'un côté le réceptacle des corps oblongs, et de l'autre le piètement permettant de positionner ce chevalet sur le sol. Dans certains cas, même, les deux branches du "X" peuvent être montées pivotantes l'une par rapport à l'autre pour pouvoir replier le chevalet pendant les périodes de non utilisation, dans le but de minimiser son encombrement pour le rangement.Trestles are already known for positioning and maintaining the logs for cutting them. These easels are essentially constituted by two substantially planar parallelepipedic supports associated to form a piece in the shape of an "X", the two branches of which constitute, on one side the receptacle for the oblong bodies, and on the other the base making it possible to position this easel. On the ground. In some cases, even, the two arms of the "X" can be pivotally mounted relative to each other to be able to fold the easel during periods of non-use, in order to minimize its size for storage.

Ces chevalets permettent de réaliser la fonction pour laquelle ils sont conçus. Cependant, ils présentent certains inconvénients qui peuvent être sources d'accidents. En effet, avec un tel chevalet, il est relativement difficile de procéder à la coupe d'une bûche tout en la maintenant correctement dans le réceptacle en forme de "V", et en assurant la stabilité du chevalet. De plus, ces chevalets ne sont pas parfaitement bien conçus pour permettre la réalisation de fagots, notamment lorsque l'on utilise une pluralité de branchages qu'il est nécessaire de réunir et de lier.These easels make it possible to carry out the function for which they are designed. However, they have certain drawbacks which can cause accidents. Indeed, with such an easel, it is relatively difficult to cut a log while maintaining it correctly in the receptacle in the shape of a "V", and ensuring the stability of the easel. In addition, these easels are not perfectly designed to allow the production of fagots, especially when using a plurality of branches that it is necessary to gather and tie.

La présente invention a pour but de pallier ces inconvénients en réalisant un chevalet permettant de positionner et maintenir les corps oblongs qu'il est destiné à recevoir, ayant une très bonne stabilité sans nécessiter une implantation fixe au sol, et permettant aussi une réalisation très facile d'ensembles comme des fagots de branchages.The object of the present invention is to overcome these drawbacks by making an easel which makes it possible to position and maintain the oblong bodies which it is intended to receive, having very good stability without requiring a fixed location on the ground, and also allowing very easy production. of sets like fagots of branches.

Plus précisément, la présente invention a pour objet un chevalet, notamment pour la réalisation de fagots, la coupe de bûches, etc,

  • comprenant un pied définissant un polygone de sustentation apte à prendre position sur un sol, caractérisé par le fait qu'il comporte:
  • un montant solidaire dudit pied dans un plan sensiblement perpendiculaire, ledit montant étant sensiblement situé sur un côté dudit pied,
  • une première mâchoire, ladite première mâchoire ayant une forme sensiblement cylindrique concave, sa concavité étant orientée vers l'extérieur du volume vertical enveloppant ledit pied et passant par ledit montant,
  • des moyens pour monter ladite première mâchoire sur ledit montant,
  • une deuxième mâchoire, ladite deuxième mâchoire ayant une forme sensiblement cylindrique concave,
  • des moyens pour monter rotative ladite deuxième mâchoire autour d'un axe par rapport à ladite première mâchoire, de façon que ledit axe de rotation soit sensiblement confondu avec l'intersection des surfaces cylindriques enveloppant les deux dites mâchoires et que les deux dites mâchoires soient dans une position l'une par rapport à l'autre dans laquelle elles sont en opposition de concavité, et
  • un levier solidaire de ladite deuxième mâchoire, de façon qu'il soit contenu dans ledit volume vertical enveloppant.
More specifically, the subject of the present invention is an easel, in particular for making fagots, cutting logs, etc.,
  • comprising a foot defining a support polygon capable of taking position on a ground, characterized in that it comprises:
  • an upright secured to said foot in a substantially perpendicular plane, said upright being substantially located on one side of said foot,
  • a first jaw, said first jaw having a substantially concave cylindrical shape, its concavity being oriented towards the outside of the vertical volume enveloping said foot and passing through said upright,
  • means for mounting said first jaw on said upright,
  • a second jaw, said second jaw having a substantially concave cylindrical shape,
  • means for rotating said second jaw about an axis relative to said first jaw, so that said axis of rotation is substantially coincident with the intersection of the cylindrical surfaces enveloping the two said jaws and that the two said jaws are in a position relative to each other in which they are in opposition to concavity, and
  • a lever secured to said second jaw, so that it is contained in said vertical enveloping volume.

D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description suivante donnée en regard des dessins annexés à titre illustratif, mais nullement limitatif, dans lesquels :

  • la Figure 1 représente, dans une vue en perspective, un mode de réalisation avantageux d'un chevalet selon l'invention,
  • la Figure 2 représente, vu de côté, le chevalet selon la Figure 1, permettant de bien comprendre le mode d'utilisation d'un tel chevalet, ainsi que les avantages qu'il peut présenter par rapport à ceux de l'art antérieur, et
  • la Figure 3 représente, en vue de côté partiellement écorchée, un autre mode de réalisation avantageux d'un chevalet selon l'invention.
Other characteristics and advantages of the present invention will appear during the following description given with reference to the drawings annexed by way of illustration, but in no way limiting, in which:
  • FIG. 1 represents, in a perspective view, an advantageous embodiment of a easel according to the invention,
  • FIG. 2 represents, seen from the side, the easel according to FIG. 1, allowing a good understanding of the mode of use of such an easel, as well as the advantages which it can present compared to those of the prior art, and
  • Figure 3 shows, in partially cut away side view, another advantageous embodiment of an easel according to the invention.

Le chevalet représenté sur la Figure 1 comprend un pied 1 constitué par une embase 2 formée de tubes 3, 4, ... assemblés les uns aux autres de façon à former un polygone de sustentation 5 de surface donnée qui, dans le mode de réalisation illustré, est une surface rectangulaire. Sur un côté 6 de l'embase 2 est fixé un montant 7 formé par un cadre tubulaire 8. La hauteur de ce cadre est sensiblement de l'ordre du mètre, bien que cette valeur ne soit donnée qu'à titre indicatif, car pouvant être définie pour chaque type d'utilisation ou application possible de ce chevalet.The easel shown in Figure 1 comprises a foot 1 consisting of a base 2 formed of tubes 3, 4, ... assembled together to the others so as to form a support polygon 5 of given surface which, in the illustrated embodiment, is a rectangular surface. On one side 6 of the base 2 is fixed an upright 7 formed by a tubular frame 8. The height of this frame is substantially of the order of a meter, although this value is given only for information, because it can be defined for each type of use or possible application of this easel.

Sur la barre de sommet 9 de ce montant 7, est fixée une première mâchoire 10 qui affecte avantageusement la forme d'une surface sensiblement cylindrique 11, dont la concavité 12 est tournée vers l'extérieur 13 du volume vertical 50 enveloppant l'embase 2 et passant par le montant 7.On the top bar 9 of this upright 7, a first jaw 10 is fixed which advantageously takes the form of a substantially cylindrical surface 11, the concavity 12 of which is turned towards the outside 13 of the vertical volume 50 enveloping the base 2 and going through the amount 7.

Dans ce mode de réalisation, la première mâchoire 10 est formée d'une pluralité de dents 14, 15, 16 régulièrement espacées définissant en fait la surface cylindrique de préhension 11 définie ci-avant. Une telle mâchoire réalisée par une pluralité de dents régulièrement espacées, comme il sera explicité, permet une meilleure préhension des objets oblongs dont les formes ne sont pas toujours uniformes, mais peuvent présenter des irrégularités, tel étant le cas des bûches de bois ou des branchages.In this embodiment, the first jaw 10 is formed of a plurality of regularly spaced teeth 14, 15, 16 defining in fact the cylindrical grip surface 11 defined above. Such a jaw made by a plurality of regularly spaced teeth, as will be explained, allows a better grip of oblong objects whose shapes are not always uniform, but may have irregularities, such as the case of logs or branches .

Comme représenté sur la Figure, la première mâchoire 10 est solidaire fixement de la barre de sommet 9 du montant 7. Cependant, dans certaines applications, on peut concevoir que cette mâchoire 10 puisse être associée à ce montant par des moyens de fixation réglables, afin de pouvoir adapter l'orientation de ses dents.As shown in the Figure, the first jaw 10 is fixedly fixed to the top bar 9 of the upright 7. However, in certain applications, it is conceivable that this jaw 10 can be associated with this upright by adjustable fixing means, in order to be able to adapt the orientation of his teeth.

A cette première mâchoire 10 est associée une deuxième mâchoire 20 elle-même avantageusement formée d'une autre pluralité de dents 21, 22, 23, de forme identique à celle des dents 14, 15, 16 décrites ci-­dessus. Cependant, cette deuxième mâchoire 20 est montée pivotante autour d'un axe 24, de façon qu'elle puisse pivoter par rapport à la première mâchoire 10 et donc par rapport au montant 7. Cet axe de rotation 24 est donc sensiblement contenu à la fois dans les deux surfaces cylindriques définissant les deux mâchoires 10 et 29 qui ont des concavités opposées, de façon que la concavité 25 de la deuxième mâchoire 20 soit tournée vers l'intérieur 26 du volume enveloppant passant par l'embase 2 et le montant 7.With this first jaw 10 is associated a second jaw 20 itself advantageously formed of another plurality of teeth 21, 22, 23, of identical shape to that of the teeth 14, 15, 16 described above. However, this second jaw 20 is pivotally mounted about an axis 24, so that it can pivot relative to the first jaw 10 and therefore relative to the upright 7. This axis of rotation 24 is therefore substantially contained at the same time in the two cylindrical surfaces defining the two jaws 10 and 29 which have opposite concavities, so that the concavity 25 of the second jaw 20 is turned towards the inside 26 of the enveloping volume passing through the base 2 and the upright 7.

Pour cela, les différentes dents 21, 22, 23 de la deuxième mâchoire 20 sont solidaires d'un arbre, ou d'une pluralité d'arbres 27, monté sur des paliers 28 solidaires de la barre de sommet du montant 7.For this, the different teeth 21, 22, 23 of the second jaw 20 are integral with a shaft, or a plurality of shafts 27, mounted on bearings 28 integral with the top bar of the upright 7.

Les différentes dents 21-23 de cette deuxième mâchoire sont solidarisées les unes aux autres, par exemple par une traverse longitudinale 29 qui est solidaire d'extensions 30, 31, 32 de ces dents, de telle façon qu'un effort appliqué sur cette traverse 29 lui faisant subir un déplacement en rotation soit uniformément transmis à l'ensemble des dents 21-23 de la deuxiême mâchoire 20, pour que l'on puisse, soit rapprocher ces dents des dents 14-16, soit les en éloigner, comme cela sera explicité ci-après.The different teeth 21-23 of this second jaw are secured to each other, for example by a longitudinal cross member 29 which is integral with extensions 30, 31, 32 of these teeth, so that a force applied to this cross member 29 making it undergo a rotational movement is uniformly transmitted to the set of teeth 21-23 of the second jaw 20, so that one can either bring these teeth closer to teeth 14-16, or move them away, as is will be explained below.

Pour faciliter la manipulation et le déplacement de cette deuxième mâchoire 20 par rapport au montant 7 et donc par rapport à la première mâchoire 10 solidaire de ce montant, un levier 40 est solidarisé à la traverse 29 en étant disposé de telle façon qu'il soit contenu dans le volume enveloppant 50 décrit ci-dessus. L'extrémité 41 de ce levier 40 a sa projection, suivant la direction perpendiculaire au plan de l'embase, contenue dans cette embase 2. De plus, la longueur de ce levier 40 est suffisante pour que l'embout 42 fixé à son extrémité 41 soit situé à une distance relativement faible de l'embase 2. Ainsi, comme explicité ci-après, une personne utilisant un tel chevalet peut poser facilement l'un de ses pieds sur cet embout 42 dont la forme le rend apte à être utilisé comme repose-pied.To facilitate the handling and movement of this second jaw 20 relative to the upright 7 and therefore relative to the first jaw 10 secured to this upright, a lever 40 is secured to the cross member 29 while being arranged so that it is contained in the enveloping volume 50 described above. The end 41 of this lever 40 has its projection, in the direction perpendicular to the plane of the base, contained in this base 2. In addition, the length of this lever 40 is sufficient for the end piece 42 fixed at its end 41 is located at a relatively small distance from the base 2. Thus, as explained below, a person using such an easel can easily place one of his feet on this end piece 42 whose shape makes it suitable for use as a footrest.

Le chevalet tel que décrit ci-dessus fonctionne et s'utilise de la façon suivante, cette explication étant plus particulièrement donnée en regard de la Figure 2. Il est à noter que, la Figure 2 représentant le même mode de réalisation d'un chevalet selon l'invention que la Figure 1, les mêmes références y désignent les mêmes éléments.The easel as described above works and is used in the following way, this explanation being more particularly given with reference to Figure 2. It should be noted that, Figure 2 representing the same embodiment of an easel according to the invention as in Figure 1, the same references designate the same elements therein.

La Figure 2 représente l'utilisation du chevalet pour la coupe d'un bûche 60. Cette bûche est positionnée entre les deux mâchoires 10 et 20 quand celles-ci sont assez éloignées pour permettre son introduction, c'est-à-dire lorsque le levier 40 est dans une position "haute" représentée en pointillés 40ʹ. La bûche 60 reposant donc sur les dents 14-16 et 21-23 des deux mâchoires, l'utilisateur 61 du chevalet pose l'un de ses pieds 62 sur l'embase 2 et l'autre 63 sur l'embout 42 du levier 40, pour tendre à abaisser ce levier 40 vers l'embase 2 et à exercer constamment sur lui une force 64 orientée vers l'embase.Figure 2 shows the use of the easel for cutting a log 60. This log is positioned between the two jaws 10 and 20 when they are far enough apart to allow its introduction, that is to say when the lever 40 is in a "high" position shown in dotted lines 40ʹ. The log 60 therefore resting on the teeth 14-16 and 21-23 of the two jaws, the user 61 of the bridge places one of his feet 62 on the base 2 and the other 63 on the end piece 42 of the lever 40, to tend to lower this lever 40 towards the base 2 and constantly exert on it a force 64 oriented towards the base.

Le chevalet étant ainsi bien maintenu par le pied 62 de l'utilisateur 61 et les deux mâchoires exerçant une force d'emprison­nement sur la bûche 60 grâce aux dents 14-16 et 21-23 qui peuvent s'imbriquer les unes dans les autres, comme représenté sur la Figure 2, cette bûche ne peut subir aucun déplacement même lorsque l'utilisateur exerce sur elle une force de coupe 67 en un point extérieur au volume 50, puisque l'utilisateur continue à exercer par son autre pied 63 une force qui garde les mâchoires serrées. L'utilisateur peut ainsi exécuter la coupe de la bûche 60 en tenant l'appareil de coupe à deux mains, alors que, l'utilisation d'un chevalet selon l'art antérieur l'obligeait à maintenir la bûche d'une main et à manipuler l'appareil de coupe avec l'autre.The bridge being thus well maintained by the foot 62 of the user 61 and the two jaws exerting a trapping force on the log 60 thanks to the teeth 14-16 and 21-23 which can be nested one inside the other, as shown in Figure 2, this log can not undergo any displacement even when the user exerts on it a cutting force 67 at a point outside the volume 50, since the user continues to exert by his other foot 63 a force which keep your jaws tight. The user can thus carry out the cutting of the log 60 by holding the cutting device with two hands, whereas, the use of an easel according to the prior art required him to hold the log with one hand and to handle the cutting device with each other.

Bien entendu, lorsque l'utilisateur a effectué une coupe, s'il est nécessaire d'en effectuer au moins une autre sur la même bûche, il relâche l'effort 64 qu'il exerce avec son pied 63, ce qui éloigne les deux mâchoires et libère la bûche 60. Il peut alors la déplacer aisément car elle demeure guidée dans le réceptacle réalisé par les deux mâchoires.Of course, when the user has made a cut, if it is necessary to make at least one other on the same log, he releases the effort 64 which he exerts with his foot 63, which distances the two jaws and releases the log 60. He can then move it easily because it remains guided in the receptacle produced by the two jaws.

Les explications données ci-avant pour l'utilisation du chevalet l'ont été en prenant une bûche comme exemple de corps à couper. Cependant, un tel chevalet peut aussi être utilisé pour la réalisation de fagots. Dans ce cas, le levier est d'abord placé dans la position "haute" 40ʹ permettant d'éloigner le plus possible les deux mâchoires. Les branchages sont alors accumulés et entassés dans le réceptacle largement ouvert. Le levier est alors abaissé par l'action de la force 64, comme décrit précédemment. Les branchages sont donc tassés et l'on peut avantageusement procéder à leur liage en différents endroits de leur longueur. L'utilisateur, maintenant toujours l'embase par son pied 62 et la masse des branchages par l'intermédiaire du levier 40 transmettant à la mâchoire 20 l'effort 64 exercé par son autre pied 63, a toute facilité d'exécuter, toujours à deux mains, la coupe des fagots qui sont ainsi formés d'une masse de branchages dense et homogène, et déjà tout liés.The explanations given above for the use of the easel were taken using a log as an example of a body to be cut. However, such an easel can also be used for making fagots. In this case, the lever is first placed in the "high" position 40ʹ allowing to move the two jaws as far as possible. The branches are then accumulated and piled up in the receptacle which is wide open. The lever is then lowered by the action of force 64, as described above. The branches are therefore packed and it is advantageous to bind them in different places along their length. The user, still maintaining the base by his foot 62 and the mass of branches by means of the lever 40 transmitting to the jaw 20 the force 64 exerted by his other foot 63, is very easy to execute, always at two hands, the cut of the bundles which are thus formed of a dense and homogeneous mass of branches, and already all linked.

La description de l'utilisation d'un tel chevalet fait bien ressortir ses avantages. Il présente une excellente stabilité. Les deux mains de l'utilisateur sont libérées pour exécuter la coupe, ce qui limite sérieusement les risques d'accidents toujours graves dans ce type de manipulation. Il permet de découper avec la même facilité et la même sécurité des bûches de toutes tailles et de toutes formes, et de réaliser des fagots les plus denses possible.The description of the use of such an easel highlights its advantages. It has excellent stability. Both the user's hands are released to carry out the cut, which seriously limits the risks of accidents always serious in this type of manipulation. It makes it possible to cut logs of all sizes and shapes with the same ease and security, and to make the densest bundles possible.

L'exemple de réalisation du chevalet décrit ci-dessus et illustré en regard des Figures 1 et 2 présente incontestablement des avantages. Cependant, pour son utilisation, il est préférable de maintenir constamment le pied 63 sur la barre transversale 42, afin d'exercer constamment une force 64 permettant de bien enserrer les différents matériaux entre les deux mâchoires 10 et 20. Or, il peut être utile d'être plus libre, afin d'effectuer toutes les opérations nécessaires pour la découpe des bûches et la réalisation des fagots, ne serait-ce que pour lier les branchages.The embodiment of the easel described above and illustrated with reference to Figures 1 and 2 undoubtedly has advantages. However, for its use, it is preferable to constantly maintain the foot 63 on the crossbar 42, in order to constantly exert a force 64 making it possible to grip the different materials well between the two jaws 10 and 20. However, it can be useful to be more free, in order to carry out all the operations necessary for cutting the logs and making the fagots, if only to tie the branches.

Le mode de réalisation illustré sur la Figure 3 permet d'éviter de maintenir le pied 63 sur la partie basse du levier 40. Pour cela, le chevalet comporte en outre des moyens blocables-déblocables 70 pouvant coopérer entre le levier 40 et le montant 7.The embodiment illustrated in Figure 3 avoids maintaining the foot 63 on the lower part of the lever 40. For this, the easel further comprises lockable-unlockable means 70 which can cooperate between the lever 40 and the amount 7 .

Dans un mode de réalisation avantageux, ces moyens blocables-­déblocables sont constitués par une crémaillère 71 montée entre le levier 40 et au moins une partie solidaire du montant 7, c'est-à-dire des barres 8, 9 constituant ce montant 7. Dans l'exemple illustré sur la Figure 3, la crémaillère comprend une portion de couronne 72 comportant des encoches de butée 73 sur au moins un de ses côtés 74, ces encoches présentant sensiblement la forme d'une denture délimitée par deux flancs, l'un raide 75 et l'autre de faible pente 76.In an advantageous embodiment, these lockable-unlockable means consist of a rack 71 mounted between the lever 40 and at least one part integral with the upright 7, that is to say bars 8, 9 constituting this upright 7. In the example illustrated in FIG. 3, the rack comprises a portion of crown 72 comprising stop notches 73 on at least one of its sides 74, these notches having substantially the shape of a toothing delimited by two flanks, the one steep 75 and the other with a slight slope 76.

Cette portion de couronne 72 est montée pivotante autour d'un axe 77 solidaire du levier 40 de façon à pouvoir subir une certaine rotation telle que celle illustrée par la flèche 78.This ring portion 72 is pivotally mounted about an axis 77 integral with the lever 40 so as to be able to undergo a certain rotation such as that illustrated by the arrow 78.

De plus, entre une extrémité 79 de cette portion de couronne et le levier 40, sont montés des moyens 80 comme un ressort permettant d'appliquer une force élastique qui, dans l'exemple illustré, est une force qui exerce une traction sur l'extrémité 79 de cette couronne pour tendre à la faire pivoter dans un sens senestrorsum 81.In addition, between one end 79 of this portion of the crown and the lever 40, means 80 are mounted like a spring making it possible to apply an elastic force which, in the example illustrated, is a force which exerts a traction on the end 79 of this crown to tend to rotate it in a senestrorsum 81 direction.

En coopération avec le montant 7 est situé un ergot de butée 82 positionné fixement par rapport à ce montant et d'une forme complémentaire à celle d'une encoche 73 délimitée entre deux dents, c'est-à-dire entre le flanc à pente relativement douce d'une dent et le flanc raide de la dent suivante. Le ressort 80 agit sur la portion de couronne de façon à ce que les flancs 75, 76 des dents viennent buter contre cet ergot, et ainsi empêcher que la couronne puisse subir un déplacement permettant au levier 40 de pivoter dans le sens dextrorsum.In cooperation with the upright 7 is located a stop lug 82 positioned fixedly with respect to this upright and of a shape complementary to that of a notch 73 delimited between two teeth, that is to say between the relatively gentle slope of one tooth and the steep flank of the next tooth. The spring 80 acts on the crown portion so that the flanks 75, 76 of the teeth abut against this lug, and thus prevent the crown from being able to undergo a movement allowing the lever 40 to pivot in the dextrorsum direction.

Ainsi, en exerçant une force sur le levier 40 pour le faire pivoter dans le sens senestrorsum, les dents de la couronne peuvent glisser contre l'ergot 82, du fait de la faible pente des flancs 76 de chaque dent, et l'ergot vient se positionner derrière la dent suivante contre le flanc à pente raide. Par contre, si on exerce sur le levier une force qui tend à le faire tourner dans le sens dextrorsum, le flanc raide d'une dent vient buter contre l'ergot et empêche ainsi la rotation de la couronne.Thus, by exerting a force on the lever 40 to rotate it in the senestrorsum direction, the teeth of the crown can slide against the lug 82, due to the slight slope of the flanks 76 of each tooth, and the lug comes position yourself behind the next tooth against the steep side. On the other hand, if a force is exerted on the lever which tends to make it rotate in the dextrorsum direction, the stiff flank of a tooth abuts against the lug and thus prevents rotation of the crown.

De plus, avantageusement, l'extrémité 79 de cette portion de couronne située à proximité du levier 40 comporte des moyens de manipulation, par exemple une poignée, 83, afin de pouvoir, quand cela est nécessaire, faire subir à cette couronne une rotation dextrorsum, notamment pour la libérer de l'ergot de butée 82.In addition, advantageously, the end 79 of this portion of the crown located near the lever 40 includes manipulation means, for example a handle, 83, so as to be able, when necessary, to subject this crown to a dextrorsum rotation , in particular to release it from the stop lug 82.

Le chevalet réalisé selon la Figure 3 s'utilise de la façon suivante. Les deux mâchoires 10 et 20 étant complètement ouvertes forment un réceptacle dans lequel sont placés, par exemple comme illustré, des branchages 90, afin d'en faire des fagots. Quand le réceptacle est suffisamment rempli, on agit sur le levier 40 pour lui faire subir une rotation senestrorsum, afin de rapprocher les deux mâchoires 10 et 20. Dans ce mouvement, la portion de couronne 72 glisse sur l'ergot 82 qui saute, dans un mouvement relatif, les dents les unes après les autres. Quand les branchages sont suffisamment tassés pour former un fagot compact, la position de l'ergot sur la couronne dentée permet de maintenir les deux mâchoires 10 et 20 serrées, sans que l'utilisateur ait besoin de garder son pied sur le levier 40. Les branchages peuvent alors être liés en passant des liens entre les dents des mâchoires, puis découpés si nécessaire.The easel made according to Figure 3 is used as follows. The two jaws 10 and 20 being completely open form a receptacle in which are placed, for example as illustrated, branches 90, in order to make bundles. When the receptacle is sufficiently filled, one acts on the lever 40 to make it undergo a senestrorsum rotation, in order to bring the two jaws 10 and 20 together. In this movement, the crown portion 72 slides on the lug 82 which jumps, in a relative movement, the teeth one after the other. When the branches are sufficiently compacted to form a compact bundle, the position of the lug on the ring gear makes it possible to keep the two jaws 10 and 20 tight, without the user needing to keep his foot on the lever 40. branches can then be tied by passing links between the teeth of the jaws, then cut if necessary.

Pour les dégager des mâchoires, on agit alors sur la poignée 83 pour faire subir à la portion de couronne une légère rotation dans le sens dextrosum 84 à l'encontre de la force exercée par le ressort, afin de dégager la dent de l'ergot 82 qui la bloquait. Les deux mâchoires 10 et 20 peuvent alors être écartées l'une de l'autre en exerçant sur le levier 40 une rotation dextrorsum ouvrant complètement le réceptacle. Le ou les fagots peuvent alors être enlevés.To release them from the jaws, action is then taken on the handle 83 to subject the crown portion to a slight rotation in the dextrosum direction 84 against the force exerted by the spring, so to release the tooth from lug 82 which blocked it. The two jaws 10 and 20 can then be separated from one another by exerting on the lever 40 a dextrorsum rotation opening the receptacle completely. The bundle (s) can then be removed.

Avec une réalisation selon la Figure 3 du chevalet selon l'invention, il n'est donc pas nécessaire d'exercer continuellement une pression sur l'embout 42 du levier 40, étant donné que celui-ci est maintenu en position par la crémaillère.With an embodiment according to Figure 3 of the easel according to the invention, it is therefore not necessary to continuously exert pressure on the end piece 42 of the lever 40, since the latter is held in position by the rack.

Les dimensions de l'embase 2 peuvent être, bien sûr, légèrement agrandies par rapport à celles correspondant à la réalisation illustrée sur les Figures 1 et 2. La stabilité du dispositif n'en sera que meilleure.The dimensions of the base 2 can be, of course, slightly enlarged compared to those corresponding to the embodiment illustrated in Figures 1 and 2. The stability of the device will only be better.

Claims (6)

1. A rack, in particular for making up faggots, cutting logs, etc., comprising a stand (1) defining a supporting polygon (5) suitable for taking position on the ground, characterized by the fact that it comprises :
- a riser (7) fixed to said stand and occupying a plane substantially perpendicular thereto, said riser being situated substantially on one side of said stand,
- a first jaw (10), said first jaw being substantially in the form of a concave cylinder, with its concave side facing out from a vertical volume (50) extending over said stand and passing through said riser,
- means (9, 28) for mounting said first jaw on said riser,
- a second jaw (20), said second jaw being substantially in the form of a concave cylinder,
- means for mounting said second jaw to rotate about an axis (24) relative to said first jaw (10) such that said axis of rotation lies substantially in the intersection between the two cylindrical surfaces of each of said jaws, and that the two jaws occupy positions relative to each other such that their concave faces face each other, and
- a lever (40, 42) fixed to said second jaw, in such a manner as to be contained within said vertical volume (50).
2. A rack according to claim 1, characterized by the fact that at least one of said two jaws (10, 20) is constituted by a plurality of teeth (14-16, 21-23).
3. A rack according to claim 1 or 2, characterized by the fact that said lever (40) includes an end piece (42) constituting a foot rest.
4. A rack according to any one of claims 1 to 3, characterized by the fact that it includes lockable and unlockable means (70) co-operating with said lever (40) and said riser (7).
5. A rack according to claim 4, characterized by the fact that the lockable and unlockable means (70) are constituted by a ratchet member (71) mounted on said lever and on said riser.
6. A rack according to claim 5, characterized by the fact that said ratchet member comprises an arcurate portion (72) including abutment teeth (73), said arcurate portion being pivotally mounted on said lever about a shaft (77), means (80) for applying a resilient force between said arcurate portion (72) and said lever (40), an abutment peg (82) fixed to said riser (7), said resilient means acting on said arcurate portion (72) in such a manner as to urge the abutment teeth (73) to co-operate with said abutment peg (82) and prevent displacement of said arcurate portion in at least one direction.
EP88902153A 1987-03-09 1988-02-26 Saw trestle Expired - Lifetime EP0304457B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88902153T ATE60916T1 (en) 1987-03-09 1988-02-26 SAWHORSE.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR8703155A FR2612116B1 (en) 1987-03-09 1987-03-09 EASEL
FR8703155 1987-03-09
CA000583037A CA1332745C (en) 1987-03-09 1988-11-14 Rack, in particular for making up faggots, cutting logs and the like

Publications (2)

Publication Number Publication Date
EP0304457A1 EP0304457A1 (en) 1989-03-01
EP0304457B1 true EP0304457B1 (en) 1991-02-20

Family

ID=9348734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88902153A Expired - Lifetime EP0304457B1 (en) 1987-03-09 1988-02-26 Saw trestle

Country Status (10)

Country Link
US (1) US4913412A (en)
EP (1) EP0304457B1 (en)
AT (1) ATE60916T1 (en)
AU (1) AU1392688A (en)
CA (1) CA1332745C (en)
DE (1) DE3861786D1 (en)
DK (1) DK162331C (en)
FI (1) FI88469C (en)
FR (1) FR2612116B1 (en)
WO (1) WO1988006957A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8812549D0 (en) * 1988-05-26 1988-06-29 Campbell N J Log holding trestle
FR2669258B1 (en) * 1990-11-16 1993-02-05 Thomas Jean Paul SELF-TURNING CUTTING BRIDGE WITH VARIABLE GEOMETRY.
US5228668A (en) * 1992-06-01 1993-07-20 Guyer Daniel O Hand-held bagel slicing jig
US5673628A (en) * 1995-12-12 1997-10-07 Boos; Shane M. Table for supporting and securing a portable computer in a vehicle
AT407024B (en) * 1998-06-02 2000-11-27 Josef Auer Firewood-cutting machine
DE10317864B4 (en) * 2003-04-16 2005-01-27 Löffler, Franz Device for cutting wood pieces
IL172991A0 (en) * 2006-01-05 2006-06-11 Oliwood Recycled Energy Ltd Solid fuel
USD747752S1 (en) * 2014-07-21 2016-01-19 Robert S. Seigler Wood splitter rack

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US173726A (en) * 1876-02-22 Improvement in saddlers horses
US167667A (en) * 1875-09-14 Improvement in wood-holders for saw-bucks
DE8118370U1 (en) * 1981-10-01 Josef und Erich Peetz oHG, 5778 Meschede "Sawhorse"
US1135815A (en) * 1914-07-29 1915-04-13 William T King Vise and saw-clamp.
US1877768A (en) * 1931-02-07 1932-09-20 Henry A Koester Tool
CH155841A (en) * 1931-07-19 1932-07-15 Roelli Victor Sawhorse.
US2428185A (en) * 1944-09-20 1947-09-30 Claude W Wallace Log-gripping and -centering sawmill dog assembly
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DE929271C (en) * 1953-09-01 1955-06-23 Werner Steinmueller Device for holding the wood while chopping
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NL8303017A (en) * 1983-08-30 1985-03-18 Christianus Martinus Adrianus METHOD FOR SAWING WOOD AND SAWBUCK.
US4678170A (en) * 1984-08-24 1987-07-07 Sampson Robert L Log holder device
US4718652A (en) * 1986-05-30 1988-01-12 Liebenstein Lowell G Sawbuck

Also Published As

Publication number Publication date
DK162331C (en) 1992-03-09
FI884959A (en) 1988-10-27
FI88469B (en) 1993-02-15
DE3861786D1 (en) 1991-03-28
DK162331B (en) 1991-10-14
US4913412A (en) 1990-04-03
ATE60916T1 (en) 1991-03-15
FI88469C (en) 1993-05-25
WO1988006957A1 (en) 1988-09-22
DK622288A (en) 1988-11-08
FR2612116A1 (en) 1988-09-16
AU1392688A (en) 1988-10-10
CA1332745C (en) 1994-10-25
EP0304457A1 (en) 1989-03-01
DK622288D0 (en) 1988-11-08
FR2612116B1 (en) 1989-06-30
FI884959A0 (en) 1988-10-27

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