EP0796707A2 - Method and device for feeding a workpiece in a circular saw - Google Patents

Method and device for feeding a workpiece in a circular saw Download PDF

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Publication number
EP0796707A2
EP0796707A2 EP97104830A EP97104830A EP0796707A2 EP 0796707 A2 EP0796707 A2 EP 0796707A2 EP 97104830 A EP97104830 A EP 97104830A EP 97104830 A EP97104830 A EP 97104830A EP 0796707 A2 EP0796707 A2 EP 0796707A2
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EP
European Patent Office
Prior art keywords
cleat
cutting
blade
push
board
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Granted
Application number
EP97104830A
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German (de)
French (fr)
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EP0796707A3 (en
EP0796707B1 (en
Inventor
Eugenio Zilio
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La Falegnameria Sas Di Zilio Eugenio & C
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La Falegnameria Sas Di Zilio Eugenio & C
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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
    • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees

Definitions

  • the present invention relates to a device and a method intended to ensure the thrust, against the cutting blade of a circular sawing machine, of a piece to be cut, according to the preamble of claim 1.
  • the cutting operation consists, for the operator, in pressing the piece of wood to be cut, designated in the following under the term of "board”, on the cast iron plate, then pushing said board against the rotating blade, which has the effect of dividing it into two parts along a rectilinear section line.
  • a disadvantage which manifests itself when using a circular sawing machine to cut a board into two pieces, is constituted by the risk of injury which the operator can undergo when the board is about to be completely cut, since the rotating blade then comes close to the operator's hand which pushes and, at the end of the operation, when said operator must move the cut piece away from said blade.
  • the main object of the present invention is to provide a device which can replace the manual operation of pushing the piece or board to be cut in the final phase of the cutting operation and which, in addition, can keep the cut part of the board away from the rotating blade.
  • the drive of the device according to the invention is fully automatic, so that the operator only has the sole task of pushing the cutting board to a safe distance from the cutting area, avoiding thus any risk of possible accident for the operator and leaving the aforementioned device the task of completing the operation.
  • the aforementioned device is defined in claim 1.
  • it comprises a cleat which, when the rear end of the board which is subjected to the cutting operation crosses a predetermined limit, comes into contact with said board and continues the thrust thereof against the rotating blade, replacing, in this way, the pushing action which, to date, was provided manually by the operator.
  • the pushing action resulting from the rectilinear movement of the cleat continues beyond the cutting blade, so as to move the two parts of the work area the board which are obtained after the cutting operation and consequently facilitate the removal of these parts by the operator, who can operate under the conditions of maximum security.
  • the push-button cleat partially backs up, waiting for a new positioning to push the next cutting board.
  • the impulse for driving the push stopper is controlled by a photoelectric cell, which detects the moment when the rear end of the work board crosses a predetermined limit, located near and upstream of the rotating blade, so that the operator can interrupt his manual pushing action, which is replaced by the fully automatic pushing action of said cleat.
  • the push stopper is articulated on a structure which is anchored on the cast iron plate of the machine and which also acts as a lateral abutment for the cutting board.
  • Guides are provided on the machine structure for adjusting the height of the cleat, in order to adapt it to the different thicknesses of the boards to be cut, as well as means and guides used to carry out the alternating linear movement of this cleat.
  • An idler roller is advantageously provided on the structure, placed in front of the push cleat and having the function of keeping the part of the working board pressed against the cast iron plate.
  • the invention also relates to a method for the implementation of the thrust device described above.
  • the piece of wood to be cut 1 constituted by a board, is placed on the cast iron plate 2 of the circular sawing machine, above which projects the circular segment 3 of the rotating blade 4.
  • the cleat 5 is mounted by means of a pivot 6 on a stirrup 7 driven by an alternative translational movement.
  • an arm 8 On the stirrup 7, at a point located in front of the cleat 5, is articulated an arm 8, provided with an idler roller 9 which, thanks to a return spring 10, keeps the board 1 pressed against the plate 2 during the cutting operation of this board.
  • a protector 11 is also fixed to the stirrup 7, in a front position relative to the cleat 5, this protector being articulated on an axis 12 and having its lower end in line with the maximum projection of the circular segment 3.
  • a stop 14 plays the role of lateral support for the plate 1 and, at the same time, also defines the width of the part to be cut, which corresponds to the space between said stop and the projecting blade.
  • a photoelectric cell 15 which detects the passage of the board 1 and, consequently, determines the location of the cleat 5, in accordance with the methods described below.
  • the angular displacement of the cleat 5 and of the protector 11 on their respective axes 6 and 12 is detected by sensors 16 and 17 respectively placed near the aforementioned elements.
  • the vertical bracket 7 is fixed in different positions to adapt the cleat 5 to the different thicknesses of the boards to be cut 1, on a horizontal crosspiece 18 which is in turn supported by an underlying element 19, which rests on the plate cast iron 1 and can be positioned differently depending on the width of the part 20 which is to be cut from the board 11.
  • a pneumatic cylinder 21 which has the function of carrying out the reciprocating rectilinear displacement of the horizontal crosspiece 18 capable of sliding on a guide 22 and, consequently, the reciprocating rectilinear displacement of the push-button 5.
  • the device During this first phase of manual pushing of the board 1, the device remains entirely stopped and, in particular, the cleat 5, by turning on its axis 6, lifts to let pass the said board located below (see Fig. 3) .
  • the change in position of the cleat 5, from the inclined orientation to the vertical orientation, is detected by the sensor 16, which sends a pulse to the control circuit which causes the reversing of the stroke of the jack. tire 21, with the final consequence of obtaining the reversal of the direction of advance of the rectilinear movement of the cleat, which, consequently, firstly bears against the rear face 23 and then pushes the board 1 against the blade rotating 4, thereby replacing the manual action of the operator (see Fig. 1 and 5).

Abstract

The toothed rotary blade (4) has a circular segment (3) protruding through a slot in the cast-iron bedplate (2) along which the piece of timber (1) is propelled by a reciprocating pusher (5) acting on its end (23). The thrust is terminated when the cleat attains the cutting zone of the blade. In front of the cleat, a free-running roller (9) on a jointed arm (8) with a return spring (10), presses the workpiece against the bedplate. The pusher is pivoted (12) on a yoke (7) which can be adjusted vertically to suit the thickness of the workpiece.

Description

La présente invention a pour objet un dispositif et un procédé destinés assurer la poussée, contre la lame de coupe d'une machine à scier circulaire, d'une pièce à couper, selon le préambule de la revendication 1.The present invention relates to a device and a method intended to ensure the thrust, against the cutting blade of a circular sawing machine, of a piece to be cut, according to the preamble of claim 1.

Ainsi qu'il est bien connu, parmi les machines-outils utilisées en menuiserie, il existe des machines à scier à disque, plus communément appelée "scies circulaires", essentiellement constituées par un bâti qui supporte un plateau en fonte à travers lequel fait saillie, à travers une fente, la partie en forme de segment circulaire d'un disque en acier présentant un bord dentelé en dents de scie, qui constitue la lame de coupe.As is well known, among the machine tools used in carpentry, there are disc sawing machines, more commonly called "circular saws", essentially constituted by a frame which supports a cast iron plate through which protrudes , through a slot, the part in the form of a circular segment of a steel disc having a serrated serrated edge, which constitutes the cutting blade.

L'opération de coupe consiste, pour l'opérateur, à appuyer la pièce de bois à couper, désignée dans ce qui suit sous le terme de "planche", sur le plateau en fonte, en poussant ensuite ladite planche contre la lame tournante, ce qui a pour effet de la subdiviser en deux parties selon une ligne de coupe rectiligne.The cutting operation consists, for the operator, in pressing the piece of wood to be cut, designated in the following under the term of "board", on the cast iron plate, then pushing said board against the rotating blade, which has the effect of dividing it into two parts along a rectilinear section line.

Sur le plateau, parallèlement à la partie saillante de la lame, se trouve aussi une butée qui sert d'appui latéral pour la planche et, en même temps, définit ainsi la largeur de la partie de ladite planche qu'il s'agit de couper.On the plate, parallel to the projecting part of the blade, there is also a stop which serves as lateral support for the board and, at the same time, thus defines the width of the part of said board which is cut.

Un inconvénient qui se manifeste lorsqu'on utilise une machine à scier circulaire pour couper une planche en deux morceaux, est constitué par le risque de blessure que l'opérateur peut subir lorsque la planche est sur le point d'être entièrement coupée, puisque la lame tournante vient alors se trouver à proximité de la main de l'opérateur qui pousse et, à la fin de l'opération, lorsque ledit opérateur doit éloigner le morceau coupé de ladite lame.A disadvantage which manifests itself when using a circular sawing machine to cut a board into two pieces, is constituted by the risk of injury which the operator can undergo when the board is about to be completely cut, since the the rotating blade then comes close to the operator's hand which pushes and, at the end of the operation, when said operator must move the cut piece away from said blade.

Normalement, tant pour pousser la planche à couper que pour éloigner la partie de la planche coupée de la lame de coupe, l'opérateur se sert d'un tige avec laquelle il agit à proximité de ladite lame.Normally, both to push the cutting board and to move the part of the cut board away from the cutting blade, the operator uses a rod with which he acts close to said blade.

Ce système, qu'on peut sensiblement assimiler à une opération manuelle, est difficile, surtout depuis que les normes de sécurité ont imposé l'utilisation de protecteurs de sécurité placés autour de la lame de coupe, lesquels protecteurs, outre qu'ils constituent évidemment une gène pour l'opération de poussée de la planche à couper, ne laissent pas à l'opérateur une vision suffisante de la zone de travail de la lame de coupe.This system, which can be roughly compared to a manual operation, is difficult, especially since safety standards have imposed the use of safety guards placed around the cutting blade, which protectors, in addition to being obviously a gene for the pushing operation of the cutting board, do not leave the operator with sufficient vision of the working area of the cutting blade.

Le but principal de la présente invention consiste à réaliser un dispositif qui puisse se substituer à l'opération manuelle de poussée de la pièce ou planche à couper dans la phase finale de l'opération de coupe et qui, en outre, puisse éloigner de la lame tournante la partie de la planche qui a été coupée.The main object of the present invention is to provide a device which can replace the manual operation of pushing the piece or board to be cut in the final phase of the cutting operation and which, in addition, can keep the cut part of the board away from the rotating blade.

L'entraînement du dispositif selon l'invention est entièrement automatique, de sorte qu'il ne reste plus à l'opérateur que la seule tâche de pousser la planche à couper jusqu'à une distance de sécurité de la zone de coupe, en évitant ainsi tout risque d'accident éventuel pour l'opérateur et en laissant au dispositif précité la tâche de terminer l'opération.The drive of the device according to the invention is fully automatic, so that the operator only has the sole task of pushing the cutting board to a safe distance from the cutting area, avoiding thus any risk of possible accident for the operator and leaving the aforementioned device the task of completing the operation.

Le dispositif précité est défini à la revendication 1. En fait il comprend un taquet qui, lorsque l'extrémité arrière de la planche qui se trouve soumise à l'opération de coupe franchit une limite prédéterminée, vient se placer en contact avec ladite planche et continue la poussée de celle-ci contre la lame tournante, en se substituant, de cette façon, à l'action de poussée qui, jusqu'à ce jour, était assurée manuellement par l'opérateur.The aforementioned device is defined in claim 1. In fact it comprises a cleat which, when the rear end of the board which is subjected to the cutting operation crosses a predetermined limit, comes into contact with said board and continues the thrust thereof against the rotating blade, replacing, in this way, the pushing action which, to date, was provided manually by the operator.

L'action de poussée résultant du déplacement rectiligne du taquet, désigné ci-après sous le terme de "taquet-poussoir", se poursuit au-delà de la lame de coupe, de manière à éloigner de la zone de travail les deux parties de la planche qui sont obtenues après l'opération de coupe et à faciliter en conséquence le prélèvement de ces parties par l'opérateur, lequel peut opérer dans les conditions de sécurité maximale.The pushing action resulting from the rectilinear movement of the cleat, hereinafter referred to as the "push cleat", continues beyond the cutting blade, so as to move the two parts of the work area the board which are obtained after the cutting operation and consequently facilitate the removal of these parts by the operator, who can operate under the conditions of maximum security.

Une fois terminée l'action de poussée, le taquet-poussoir revient partiellement en arrière, en restant dans l'attente d'un nouveau positionnement pour réaliser la poussée de la planche à couper suivante.Once the pushing action has ended, the push-button cleat partially backs up, waiting for a new positioning to push the next cutting board.

L'impulsion pour l'entraînement du taquet-poussoir est commandée par une cellule photo-électrique, laquelle détecte le moment où l'extrémité arrière de la planche à travailler franchit une limite prédéterminée, située à proximité et en amont de la lame tournante, de sorte que l'opérateur peut interrompre son action manuelle de poussée, qui est remplacée par l'action entièrement automatique de poussée dudit taquet.The impulse for driving the push stopper is controlled by a photoelectric cell, which detects the moment when the rear end of the work board crosses a predetermined limit, located near and upstream of the rotating blade, so that the operator can interrupt his manual pushing action, which is replaced by the fully automatic pushing action of said cleat.

En ce qui concerne la construction, le taquet-poussoir est articulé sur une structure qui est ancrée sur le plateau en fonte de la machine et qui joue aussi le rôle de butée latérale d'appui pour la planche à couper.With regard to construction, the push stopper is articulated on a structure which is anchored on the cast iron plate of the machine and which also acts as a lateral abutment for the cutting board.

Sur la structure de la machine sont prévus des guides servant pour le réglage en hauteur du taquet, afin de l'adapter aux différentes épaisseurs des planches à couper, ainsi que des moyens et des guides servant à réaliser le déplacement linéaire alternatif de ce taquet.Guides are provided on the machine structure for adjusting the height of the cleat, in order to adapt it to the different thicknesses of the boards to be cut, as well as means and guides used to carry out the alternating linear movement of this cleat.

Il est avantageusement prévu sur la structure un galet fou, placé en avant du taquet-poussoir et ayant pour fonction de maintenir la partie de la planche à travailler pressée contre le plateau en fonte.An idler roller is advantageously provided on the structure, placed in front of the push cleat and having the function of keeping the part of the working board pressed against the cast iron plate.

Finalement, toujours en avant du taquet-poussoir, se trouve également un protecteur de sécurité qui empêche la lame tournante de venir toucher ledit taquet pour le cas où, par erreur, la lame ferait saillie au-dessus du plateau en fonte sur une distance beaucoup plus grande que l'épaisseur de la planche à couper.Finally, still in front of the push-button cleat, there is also a safety protector which prevents the rotating blade from touching said cleat in the event that, by mistake, the blade protrudes above the cast iron plate over a distance much greater than the thickness of the cutting board.

L'invention a également pour objet un procédé pour la mise en oeuvre du dispositif de poussée ci-dessus exposé.The invention also relates to a method for the implementation of the thrust device described above.

Les caractéristiques de l'invention seront mieux mises en évidence par la description d'une forme possible de réalisation du dispositif en cause, donnée uniquement à titre d'exemple illustratif et non limitatif, à l'aide du dessin annexé dans lequel :

  • la Fig. 1 est une coupe longitudinale du dispositif selon l'invention ;
  • la Fig. 2 en est une vue en plan.
  • la Fig. 3 illustre la phase de travail du dispositif, lorsque la planche est coupée à la suite de la poussée d'avance manuelle produite par l'opérateur, le dispositif étant encore à l'arrêt ;
  • la Fig. 4 montre la phase du déplacement vers l'arrière du taquet-poussoir par lequel ce dernier se place à l'extrémité de la planche partiellement coupée ;
  • la Fig. 5 représente la phase de poussée de la planche exécutée au moyen du taquet-poussoir ;
  • la Fig. 6 illustre la phase finale de la coupe de la planche.
The characteristics of the invention will be better demonstrated by the description of a possible embodiment of the device in question, given solely by way of illustrative and nonlimiting example, with the aid of the appended drawing in which:
  • Fig. 1 is a longitudinal section of the device according to the invention;
  • Fig. 2 is a plan view thereof.
  • Fig. 3 illustrates the working phase of the device, when the board is cut following the manual advance push produced by the operator, the device being still at a standstill;
  • Fig. 4 shows the phase of the rearward movement of the push-stopper by which the latter is placed at the end of the partially cut board;
  • Fig. 5 shows the pushing phase of the board executed by means of the push-button;
  • Fig. 6 illustrates the final phase of cutting the board.

Comme on peut le voir sur les Fig. 1 et 2, la pièce de bois à couper 1, constituée par une planche, est posée sur le plateau en fonte 2 de la machine à scier circulaire, au-dessus duquel fait saillie le segment circulaire 3 de la lame tournante 4.As can be seen in Figs. 1 and 2, the piece of wood to be cut 1, constituted by a board, is placed on the cast iron plate 2 of the circular sawing machine, above which projects the circular segment 3 of the rotating blade 4.

Le mouvement d'avance de la planche 1 contre la lame 4, qui sert à réaliser l'opération de coupe, résulte de la poussée produite par un taquet-poussoir 5, qui s'appuie sur la partie terminale de ladite planche.The advance movement of the board 1 against the blade 4, which is used to carry out the cutting operation, results from the thrust produced by a push-stopper 5, which rests on the end part of said board.

Le taquet 5 est monté au moyen d'un pivot 6 sur un étrier 7 animé d'un mouvement de translation alternative.The cleat 5 is mounted by means of a pivot 6 on a stirrup 7 driven by an alternative translational movement.

Sur l'étrier 7, en un point situé en avant du taquet 5, est articulé un bras 8, muni d'un galet fou 9 qui grâce à un ressort de rappel 10, maintient la planche 1 pressée contre le plateau 2 pendant l'opération de coupe de cette planche.On the stirrup 7, at a point located in front of the cleat 5, is articulated an arm 8, provided with an idler roller 9 which, thanks to a return spring 10, keeps the board 1 pressed against the plate 2 during the cutting operation of this board.

Un protecteur 11 est aussi fixé sur l'étrier 7, dans une position avant par rapport au taquet 5, ce protecteur étant articulé sur un axe 12 et ayant son extrémité inférieure en ligne avec la saillie maximale du segment circulaire 3.A protector 11 is also fixed to the stirrup 7, in a front position relative to the cleat 5, this protector being articulated on an axis 12 and having its lower end in line with the maximum projection of the circular segment 3.

Une butée 14 joue le rôle d'appui latéral pour la planche 1 et, en même temps, définit aussi la largeur de la partie à couper, qui correspond à l'espace entre ladite butée et la lame saillante.A stop 14 plays the role of lateral support for the plate 1 and, at the same time, also defines the width of the part to be cut, which corresponds to the space between said stop and the projecting blade.

Sur la butée 14, est intercalée, en position frontale, une cellule photo-électrique 15 qui détecte le passage de la planche 1 et, en conséquence, détermine l'emplacement du taquet 5, conformément aux modalités décrites ci-après.On the stop 14, there is interposed, in the frontal position, a photoelectric cell 15 which detects the passage of the board 1 and, consequently, determines the location of the cleat 5, in accordance with the methods described below.

Le déplacement angulaire du taquet 5 et du protecteur 11 sur leurs axes respectifs 6 et 12, est détecté par des capteurs 16 et 17 respectivement placés à proximité des éléments précités.The angular displacement of the cleat 5 and of the protector 11 on their respective axes 6 and 12 is detected by sensors 16 and 17 respectively placed near the aforementioned elements.

L'étrier vertical 7 se fixe dans différentes positions pour adapter le taquet 5 aux différentes épaisseurs des planches à couper 1, sur une traverse horizontale 18 qui est à son tour supportée par un élément sous-jacent 19, lequel s'appuie sur le plateau en fonte 1 et peut être positionné différemment en fonction de la largeur de la partie 20 qu'il s'agit de découper dans la planche 11.The vertical bracket 7 is fixed in different positions to adapt the cleat 5 to the different thicknesses of the boards to be cut 1, on a horizontal crosspiece 18 which is in turn supported by an underlying element 19, which rests on the plate cast iron 1 and can be positioned differently depending on the width of the part 20 which is to be cut from the board 11.

Sur l'élément 19 est fixé un vérin pneumatique 21 qui a pour fonction de réaliser le déplacement rectiligne alternatif de la traverse horizontale 18 susceptible de coulisser sur un guide 22 et, par conséquent, le déplacement rectiligne alternatif du taquet-poussoir 5.On the element 19 is fixed a pneumatic cylinder 21 which has the function of carrying out the reciprocating rectilinear displacement of the horizontal crosspiece 18 capable of sliding on a guide 22 and, consequently, the reciprocating rectilinear displacement of the push-button 5.

L'opération de coupe de la planche de bois 1, qui est représentée dans les différentes phases aux Fig. 3 à 6, commence avec l'action manuelle de l'opérateur, qui pousse ladite planche contre la lame tournante 4.The cutting operation of wooden board 1, which is shown in the different phases in Figs. 3 to 6, begins with the manual action of the operator, who pushes said board against the rotating blade 4.

Pendant cette première phase de poussée manuelle de la planche 1, le dispositif reste entièrement arrêté et, en particulier, le taquet 5, en tournant sur son axe 6, se soulève pour laisser passer ladite planche située au-dessous (voir Fig. 3).During this first phase of manual pushing of the board 1, the device remains entirely stopped and, in particular, the cleat 5, by turning on its axis 6, lifts to let pass the said board located below (see Fig. 3) .

Lorsqu'à la suite du déplacement manuel de poussée, la face extrême arrière 23 de la planche en cours de travail franchit la ligne de lecture de la cellule photo-électrique 15, débute l'action d'un vérin pneumatique 21 qui entraîne la traverse horizontale 18 et l'étrier 7, en provoquant le déplacement vers l'arrière, c'est-à-dire en sens inverse de l'avancement de la planche 1, du taquet 5 qui, pouvant s'incliner sur l'axe 6, glisse sur ladite planche (voir Fig. 4).When, following the manual displacement of thrust, the rear end face 23 of the board during work crosses the reading line of the photoelectric cell 15, begins the action of a pneumatic cylinder 21 which drives the cross-member horizontal 18 and the stirrup 7, causing the rearward displacement, that is to say in the opposite direction of the advancement of the board 1, of the cleat 5 which, being able to tilt on the axis 6 , slides on said board (see Fig. 4).

Lorsque le taquet 5, dans son déplacement rectiligne vers l'arrière, franchit la face arrière extrême 23, il se replace en position verticale (fig. 5).When the cleat 5, in its rectilinear rearward movement, crosses the extreme rear face 23, it returns to the vertical position (fig. 5).

Le changement de position du taquet 5, de l'orientation inclinée à l'orientation verticale, est détecté par le capteur 16, lequel envoie une impulsion au circuit de commande qui provoque l'inversion de la course du vérin pneumatique 21, avec pour conséquence finale d'obtenir l'inversion du sens d'avance du mouvement rectiligne du taquet, lequel, en conséquence, prend tout d'abord appui contre la face arrière 23 et ensuite, pousse la planche 1 contre la lame tournante 4, en se substituant de cette façon à l'action manuelle de l'opérateur (voir Fig. 1 et 5).The change in position of the cleat 5, from the inclined orientation to the vertical orientation, is detected by the sensor 16, which sends a pulse to the control circuit which causes the reversing of the stroke of the jack. tire 21, with the final consequence of obtaining the reversal of the direction of advance of the rectilinear movement of the cleat, which, consequently, firstly bears against the rear face 23 and then pushes the board 1 against the blade rotating 4, thereby replacing the manual action of the operator (see Fig. 1 and 5).

A la fin de l'opération de coupe de la planche 1, c'est-à-dire lorsque le taquet-poussoir 5 a dépassé la lame 4, le vérin pneumatique 21 inverse de nouveau sa course en ramenant ledit taquet en arrière et en l'arrêtant dans une position intermédiaire, ce taquet restant dans l'attente de l'opération de poussée suivante (voir Fig. 6).At the end of the cutting operation of the board 1, that is to say when the pusher cleat 5 has passed the blade 4, the pneumatic cylinder 21 again reverses its travel by bringing said cleat back and in stopping it in an intermediate position, this cleat remaining pending the next pushing operation (see Fig. 6).

Claims (13)

Dispositif pour la poussée de la pièce ou planche à couper dans une machine à scier circulaire, laquelle comprend un plateau en fonte (2) au-dessus duquel fait saillie, à travers une fente appropriée, un segment circulaire (3) d'une lame tournante dentée (4) qui a pour fonction de couper la pièce en bois (1) posée sur ledit plateau et poussée contre ladite lame, caractérisé en ce qu'il comporte un taquet-poussoir (5) animé d'un mouvement rectiligne alternatif, qui vient se placer en contact avec la face extrême arrière (23) de ladite pièce en cours de travail et exerce sur celle-ci une action de poussée qui permet la coupe de cette pièce, ladite action de poussée se terminant lorsque, dans son déplacement rectiligne, ledit taquet a franchi la zone de coupe de la lame (4).Device for pushing the workpiece or cutting board in a circular sawing machine, which comprises a cast iron plate (2) above which protrudes, through an appropriate slot, a circular segment (3) of a blade rotating toothed (4) which has the function of cutting the wooden piece (1) placed on said plate and pushed against said blade, characterized in that it comprises a push-stopper (5) driven by an alternating rectilinear movement, which comes into contact with the rear end face (23) of said piece during work and exerts on it a pushing action which allows the cutting of this piece, said pushing action ending when, in its movement straight, said cleat has crossed the cutting zone of the blade (4). Dispositif selon la revendication 1, caractérisé en ce qu'il présente, en avant du taquet-poussoir (5), un galet fou (9) qui presse la partie de la pièce en cours de travail contre le plateau en fonte (2).Device according to claim 1, characterized in that it has, before the push-button (5), an idler roller (9) which presses the part of the part during work against the cast iron plate (2). Dispositif selon la revendication 1, caractérisé en ce que le taquet-poussoir (5) qui est articulé, par un pivot (12), sur un étrier (7) qui peut être réglé dans la direction verticale pour permettre audit taquet de s'adapter aux différentes épaisseurs des pièces de bois (1) à couper.Device according to claim 1, characterized in that the pusher cleat (5) which is articulated, by a pivot (12), on a stirrup (7) which can be adjusted in the vertical direction to allow said cleat to adapt to the different thicknesses of the pieces of wood (1) to be cut. Dispositif selon la revendication 2, caractérisé en ce que le galet fou (9) est supporté par un bras (8) articulé sur l'étrier (7) et est maintenu en contact avec la pièce (1) par l'action d'un ressort de rappel (10).Device according to claim 2, characterized in that the idler roller (9) is supported by an arm (8) articulated on the stirrup (7) and is kept in contact with the part (1) by the action of a return spring (10). Dispositif selon la revendication 1, caractérisé en ce qu'il comprend un protecteur (11), qui, articulé sur l'étrier (7) par un pivot (12), présente son extrémité inférieure suivant l'axe de la saillie du segment circulaire (3) de la lame de coupe (4).Device according to claim 1, characterized in that it comprises a protector (11), which, articulated on the stirrup (7) by a pivot (12), has its lower end along the axis of the projection of the circular segment (3) of the cutting blade (4). Dispositif selon les revendications 3, 4 et 5, caractérisé en ce que l'étrier (7) est supporté par une traverse horizontale (18) supportée à son tour par un élément (19) qui s'appuie sur le plateau en fonte (2), ledit élément pouvant être positionné différemment en fonction des différentes largeurs de la partie (20) qu'il s'agit de couper dans la pièce (1).Device according to claims 3, 4 and 5, characterized in that the stirrup (7) is supported by a horizontal crosspiece (18) supported in turn by an element (19) which rests on the cast iron plate (2 ), said element being able to be positioned differently as a function of the different widths of the part (20) which is to be cut in the part (1). Dispositif selon les revendications 1 et 6, caractérisé en ce que la partie avant de l'élément (19) joue le rôle d'une butée (14) pour l'appui latéral de la pièce (1) et définit ainsi la largeur de la partie (20) à couper.Device according to claims 1 and 6, characterized in that the front part of the element (19) acts as a stop (14) for the lateral support of the part (1) and thus defines the width of the part (20) to be cut. Dispositif selon les revendications 1 et 7, caractérisé en ce que sur la butée (14), est insérée, en amont de la lame de coupe (4), une cellule photo-électrique (15) qui détecte le passage de la pièce (1) en cours de coupe.Device according to Claims 1 and 7, characterized in that a photocell is inserted upstream of the cutting blade (4) on the stop (14) (15) which detects the passage of the part (1) during cutting. Dispositif selon les revendications 1 et 6, caractérisé en ce que le mouvement rectiligne alternatif du taquet-poussoir (5) est réalisé à l'aide d'un vérin pneumatique (21) solidaire de l'élément (19), qui entraîne une traverse horizontale (18) montée à coulissement sur un guide (22).Device according to Claims 1 and 6, characterized in that the reciprocating rectilinear movement of the push-button cleat (5) is carried out by means of a pneumatic cylinder (21) integral with the element (19), which drives a cross-member horizontal (18) slidably mounted on a guide (22). Dispositif selon les revendications 1 et 5, caractérisé en ce que la rotation du taquet-poussoir (5) et du protecteur (11) sur leurs pivots-supports respectifs (6, 12) est détectée par des capteurs (16, 17).Device according to Claims 1 and 5, characterized in that the rotation of the push-button (5) and of the protector (11) on their respective support pivots (6, 12) is detected by sensors (16, 17). Procédé pour la mise en oeuvre du dispositif suivant les revendications 1 à 10, caractérisé en ce que, lorsqu'à la suite du déplacement manuel de poussée exécuté par l'opérateur, la face extérieure arrière (23) de la pièce ou planche à couper (1) franchit la ligne de lecture de la cellule photo-électrique (15), ladite cellule photo-électrique fournit une impulsion pour mettre en action le vérin pneumatique (21), lequel, en entraînant respectivement la traverse (18) et l'étrier (7), provoque le déplacement rectiligne du taquet-poussoir (5) en sens inverse du sens d'avance de ladite pièce, ledit taquet se trouvant alors dans une position inclinée.Method for implementing the device according to Claims 1 to 10, characterized in that, when, following the manual movement of thrust carried out by the operator, the rear external face (23) of the workpiece or cutting board (1) crosses the reading line of the photoelectric cell (15), said photoelectric cell provides an impulse to actuate the pneumatic cylinder (21), which, respectively driving the crosspiece (18) and the stirrup (7), causes the rectilinear displacement of the pusher cleat (5) in the opposite direction to the direction of advance of said part, said cleat then being in an inclined position. Procédé selon la revendication 11, caractérisé en ce que lorsque dans son mouvement de translation, le taquet-poussoir (5) franchit la face extrême arrière (23) de la pièce (1), il se replace en position verticale et en ce que cette nouvelle position est détectée par le capteur (12), lequel envoie un signal d'inversion du sens de la course du vérin pneumatique (21), ledit taquet allant tout d'abord prendre appui contre ladite face et venant ensuite provoquer une action de poussée sur ladite pièce dans le même sens que l'action de poussée manuelle.Method according to claim 11, characterized in that when in its translational movement, the push-stopper (5) crosses the rear end face (23) of the part (1), it is replaced in the vertical position and in that this new position is detected by the sensor (12), which sends a signal for reversing the direction of travel of the pneumatic cylinder (21), said cleat going first to bear against said face and then causing a pushing action on said part in the same direction as the manual pushing action. Procédé selon les revendications 11 et 12, caractérisé en ce que le déplacement, combiné à l'action de poussée du taquet-poussoir (5), se poursuit jusqu'à ce que ledit taquet ait franchi la zone de coupe de la lame (4) et qu'une fois cette action terminée, le vérin pneumatique (21) inverse de nouveau le sens de la course, en ramenant ainsi le taquet (5) dans une position intermédiaire d'attente.Method according to claims 11 and 12, characterized in that the movement, combined with the pushing action of the push-button cleat (5), continues until said cleat has crossed the cutting zone of the blade (4 ) and that once this action is completed, the pneumatic cylinder (21) again reverses the direction of travel, thereby bringing the cleat (5) into an intermediate waiting position.
EP97104830A 1996-03-22 1997-03-21 Method and device for feeding a workpiece in a circular saw Expired - Lifetime EP0796707B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96VI000041A IT1291085B1 (en) 1996-03-22 1996-03-22 SAFETY DEVICE FOR PUSHING THE BOARD TO BE CUT INTO A DISC SAW
ITVI960041 1996-03-22

Publications (3)

Publication Number Publication Date
EP0796707A2 true EP0796707A2 (en) 1997-09-24
EP0796707A3 EP0796707A3 (en) 1999-07-28
EP0796707B1 EP0796707B1 (en) 2004-07-21

Family

ID=11425996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104830A Expired - Lifetime EP0796707B1 (en) 1996-03-22 1997-03-21 Method and device for feeding a workpiece in a circular saw

Country Status (3)

Country Link
EP (1) EP0796707B1 (en)
DE (1) DE69729903D1 (en)
IT (1) IT1291085B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102909759A (en) * 2012-11-12 2013-02-06 许小杨 Feeding structure of slicer
CN103140330A (en) * 2010-10-04 2013-06-05 罗伯特·博世有限公司 Work piece guide device
CN108908490A (en) * 2018-08-03 2018-11-30 福建长汀县元创木工机械有限公司 A kind of wood composite pallet foot pier automatic moulding machine
CN110050663A (en) * 2019-05-22 2019-07-26 邹冬田 A kind of Chinese fir log cutting separating one-piece of occlusion push
DE102018132101A1 (en) * 2018-12-13 2020-06-18 Weinmann Holzbausystemtechnik Gmbh Sawing device
CN112045779A (en) * 2020-08-06 2020-12-08 许天长 Equipment for cutting small wood for home decoration

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104476624A (en) * 2014-12-05 2015-04-01 李孟军 Multi-chip discharge machine

Citations (4)

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Publication number Priority date Publication date Assignee Title
GB185254A (en) * 1921-06-20 1922-09-07 William Lawes Cole Improvements in and relating to saw benches
US1798570A (en) * 1930-06-30 1931-03-31 Indianapolis Wire Bound Box Co Feeder for woodworking machines
US3880032A (en) * 1973-08-22 1975-04-29 Dwight C Green Feeler operated saw guard
US4603612A (en) * 1984-12-17 1986-08-05 Atkins Richard R Safety attachment for a table saw

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB185254A (en) * 1921-06-20 1922-09-07 William Lawes Cole Improvements in and relating to saw benches
US1798570A (en) * 1930-06-30 1931-03-31 Indianapolis Wire Bound Box Co Feeder for woodworking machines
US3880032A (en) * 1973-08-22 1975-04-29 Dwight C Green Feeler operated saw guard
US4603612A (en) * 1984-12-17 1986-08-05 Atkins Richard R Safety attachment for a table saw

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103140330A (en) * 2010-10-04 2013-06-05 罗伯特·博世有限公司 Work piece guide device
CN102909759A (en) * 2012-11-12 2013-02-06 许小杨 Feeding structure of slicer
CN102909759B (en) * 2012-11-12 2014-06-11 许小杨 Feeding structure of slicer
CN108908490A (en) * 2018-08-03 2018-11-30 福建长汀县元创木工机械有限公司 A kind of wood composite pallet foot pier automatic moulding machine
DE102018132101A1 (en) * 2018-12-13 2020-06-18 Weinmann Holzbausystemtechnik Gmbh Sawing device
US11717983B2 (en) 2018-12-13 2023-08-08 Weinmann Holzbausystemtechnik Gmbh Sawing device
CN110050663A (en) * 2019-05-22 2019-07-26 邹冬田 A kind of Chinese fir log cutting separating one-piece of occlusion push
CN112045779A (en) * 2020-08-06 2020-12-08 许天长 Equipment for cutting small wood for home decoration
CN112045779B (en) * 2020-08-06 2022-05-24 许天长 Equipment for cutting small wood for home decoration

Also Published As

Publication number Publication date
ITVI960041A1 (en) 1997-09-22
EP0796707A3 (en) 1999-07-28
DE69729903D1 (en) 2004-08-26
ITVI960041A0 (en) 1996-03-22
IT1291085B1 (en) 1998-12-14
EP0796707B1 (en) 2004-07-21

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