Classifications

• • 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 made up of two substantially planar parallelepipedic supports associated to form an "X" shaped part, 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 floor.
• the two branches 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 keeping 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 bind.
• the object of the present invention is to overcome these drawbacks by providing 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 subject of the present invention is an easel, in particular for making fagots, cutting logs, etc., characterized in that it comprises: - a foot defining a support polygon capable of taking position on a ground,
• 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,
• said second jaw having a substantially cylindrical concave shape
• FIG. 1 represents, in a perspective view, an advantageous embodiment of a easel according to the invention
• FIG. 2 shows, seen from the side, the easel according to Figure 1, to understand the mode of use of such an easel, as well as the advantages it can have compared to those of the prior art , and
• FIG. 3 shows, in partially cutaway view, another advantageous embodiment of an easel according to the invention.
• 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 adjust 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 20 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 various 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 subjecting 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 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 these 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 rests on the teeth 14-16 and 21—23 of the two jaws, the user 61 of the easel 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 to constantly exert on it a force 64 oriented towards the base.
• 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 fagots which are thus formed from a dense and homogeneous mass of branches, and already all linked.
• the description of the use of such an easel highlights its advantages. It has excellent stability. Both the user's hands are released to execute 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.
• 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 transverse bar 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.
• the embodiment illustrated in Figure 3 avoids maintaining the foot 63 on the lower part of the lever 40.
• 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 crown 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 make it pivot in one direction.
• senestrorsum 81 In cooperation with the upright 7 is located a stop lug 82 fixedly positioned relative 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 handling 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.
• handling means for example a handle 83
• the easel produced according to FIG. 3 is used in the following manner.
• 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 are placed, for example as illustrated, branches 90, in order to make bundles.
• the lever 40 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 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.

Priority Applications (1)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

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• 1987
  • 1987-03-09 FR FR8703155A patent/FR2612116B1/fr not_active Expired
• 1988
  • 1988-02-26 DE DE8888902153T patent/DE3861786D1/de not_active Expired - Lifetime
  • 1988-02-26 EP EP88902153A patent/EP0304457B1/de not_active Expired - Lifetime
  • 1988-02-26 AU AU13926/88A patent/AU1392688A/en not_active Abandoned
  • 1988-02-26 US US07/286,924 patent/US4913412A/en not_active Expired - Fee Related
  • 1988-02-26 WO PCT/FR1988/000108 patent/WO1988006957A1/fr active IP Right Grant
  • 1988-02-26 AT AT88902153T patent/ATE60916T1/de not_active IP Right Cessation
  • 1988-10-27 FI FI884959A patent/FI88469C/fi not_active IP Right Cessation
  • 1988-11-08 DK DK622288A patent/DK162331C/da not_active IP Right Cessation
  • 1988-11-14 CA CA000583037A patent/CA1332745C/en not_active Expired - Fee Related

Non-Patent Citations (1)

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