FR2563758A1 - Improvements to motor saws and other machines equipped with a tool-carrying head with a linear or pendular travel - Google Patents

Improvements to motor saws and other machines equipped with a tool-carrying head with a linear or pendular travel Download PDF

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Publication number
FR2563758A1
FR2563758A1 FR8407248A FR8407248A FR2563758A1 FR 2563758 A1 FR2563758 A1 FR 2563758A1 FR 8407248 A FR8407248 A FR 8407248A FR 8407248 A FR8407248 A FR 8407248A FR 2563758 A1 FR2563758 A1 FR 2563758A1
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France
Prior art keywords
head
tool
stop
approach
rod
Prior art date
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Withdrawn
Application number
FR8407248A
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French (fr)
Inventor
Regis Rodet
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RGA
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RGA
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Priority to FR8407248A priority Critical patent/FR2563758A1/en
Publication of FR2563758A1 publication Critical patent/FR2563758A1/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16PSAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/02Screens or other safety members moving in synchronism with members which move to and fro
    • F16P3/04Screens or other safety members moving in synchronism with members which move to and fro for machines with parts which approach one another during operation, e.g. for stamping presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/08Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for bringing the circular saw blade to the workpiece or removing same therefrom
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25Movable or adjustable work or tool supports
    • B23Q1/64Movable or adjustable work or tool supports characterised by the purpose of the movement
    • B23Q1/68Movable or adjustable work or tool supports characterised by the purpose of the movement for withdrawing tool or work during reverse movement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • B23Q5/58Safety devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)

Abstract

In order to provide the automatic cutoff of the power supply to the motor which drives the rotating tool as soon as the movable head 1 starts to move upwards, a contact 5 is mounted on the head, the manoeuvring member 5a of which contact is subjected to the action of a stop 6 carried by a stem 7 which moves with the said head on lowering, but which is braked by a friction sleeve 11 as soon as it starts to move upwards.

Description

La présente invention a trait aux tronçonneuses et autres machinesoutils dans lesquelles l'outil tournant, normalement protégé par un carter éclipsable, est porté par une tête animée, de manière manuelle, semi-automatique ou automatique, d'une course linéaire ou pendulaire comprenant une phase d'approche, une phase de travail proprement dit et une phase de retour. The present invention relates to chainsaws and other machine tools in which the rotating tool, normally protected by an eclipsable casing, is carried by an animated head, in a manual, semi-automatic or automatic manner, of a linear or pendular stroke comprising a approach phase, a work phase proper and a return phase.

On sait que les machines de ce genre sont dotées d'un système de sécurité comprenant d'une part un contacteur agencé de manière à faire automatiquement cesser l'entratnement de l'outil et l'arrosage de la pièce lorsque la tête de travail arrive en fin de phase de retour, et d'autre part un bouton de mise en marche manuel qui doit être obligatoirement actionné par l'opérateur pour la remise en état de fonctionnement des moteurs (outil et pompe). Il convient cependant d'observer qu'un tel systeme n'assure pas une sécurité absolue puisqu'au cours de Dla phase de retour et à un moment où l'outil est entrainé en rotation l'opérateur peut, de maniere volontaire ou involontaire, éclipser le carter mobile de protection qui découvre alors ledit outil. We know that machines of this kind have a safety system comprising on the one hand a contactor arranged so as to automatically stop the drive of the tool and the watering of the part when the working head arrives at the end of the return phase, and on the other hand, a manual start button which must be actuated by the operator to restore the engines (tool and pump) to operating condition. It should however be observed that such a system does not provide absolute security since during the return phase and at a time when the tool is rotated the operator can, voluntarily or involuntarily, eclipse the mobile protective casing which then uncovers said tool.

C'est à cet inconvénient qu'entend principalement remédier la présente invention, laquelle consiste essentiellement à faire comporter à la machine un dispositif complémentaire de sécurité agencé de manière à faire cesser l'entrainement de l'outil et l'arrosage de la pièce dès qu'en un point quelconque de la phase d'approche et de travail de sa course, la tête porte-outil amorce la phase de retour. It is to this drawback that the present invention mainly intends to remedy, which consists essentially in making the machine comprise an additional safety device arranged so as to stop the drive of the tool and the watering of the part as soon as that at any point in the approach and work phase of its stroke, the tool head starts the return phase.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer
Fig. 1 est une vue partielle en perspective montrant l'agencement général d'une tronçonneuse comportant application des perfectionnements suivant l'invention.
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing.
Fig. 1 is a partial perspective view showing the general arrangement of a chainsaw comprising application of the improvements according to the invention.

Fig. 2, 3 et 4 sont des coupes verticales schématiques illustrant le fonctionnement du dispositif de sécurité qui équipe la tronçonneuse de fig. 1. Fig. 2, 3 and 4 are schematic vertical sections illustrating the operation of the safety device which equips the chainsaw of FIG. 1.

Sur ce dessin, la référence 1 désigne la tête porte-outil de la tronçonneuse, laquelle tête est agencée de façon à se déplacer alternativement le long d'une colonne principale 2 et d'une colonne latérale 3 réunies l'une à l'autre à leur sommet par une bride 4. La base des colonnes 2 et 3 est portée par un bâti fixe non représenté, de telle sorte que c'est la tête 1 qui se déplace verticalement dans deux sens opposés (flèche double F1 de fig. 1).  In this drawing, the reference 1 designates the tool-holder head of the chainsaw, which head is arranged so as to move alternately along a main column 2 and a lateral column 3 joined to each other at their top by a flange 4. The base of columns 2 and 3 is carried by a fixed frame not shown, so that it is the head 1 which moves vertically in two opposite directions (double arrow F1 of fig. 1 ).

Conformément à l'invention, on a rapporté sur la partie supérieure de la tête porte-outil 1 un contacteur électrique 5 dont l'organe de manoeuvre Sa, mobile horizontalement à l'encontre de moyens élastiques de rappel, est actionné à l'aide d'une butée 6 à profil tronconique, rendue solidaire d'une tige verticale 7. Comme on le#comprendra mieux ci-après, le contacteur 5 est branché sur le circuit qui alimente d'une part le moteur qui assure l'entrainement en rotation de la fraise ou autre outil tournant de la tronçonneuse, d'autre part le moteur de la pompe destinée à l'arrosage de la pièce à tronçonner. In accordance with the invention, an electrical contactor 5 has been attached to the upper part of the tool-holder head 1, the operating member Sa of which, moving horizontally against elastic return means, is actuated using a stop 6 with a frustoconical profile, made integral with a vertical rod 7. As will be better understood below, the contactor 5 is connected to the circuit which supplies on the one hand the motor which provides the drive in rotation of the cutter or other rotating tool of the chainsaw, on the other hand the motor of the pump intended for watering the part to be cut.

La tige 7 qui porte la butée d'actionnement 6 est prévue mobile verticalement et à cet effet elle est guidée, au voisinage de ses extrémités, à l'intérieur d'une perforation la pratiquée dans la paroi horizontale supérieure de la tête 1, et d'une perforation 8a prévue dans une entretoise 8 qui est reliée à ladite tête par deux colonnettes 9 de façon à se déplacer avec celle-ci. The rod 7 which carries the actuating stop 6 is provided vertically movable and for this purpose it is guided, in the vicinity of its ends, inside a perforation made in the upper horizontal wall of the head 1, and a perforation 8a provided in a spacer 8 which is connected to said head by two balusters 9 so as to move therewith.

Immédiatement au-dessous de l'entretoise 8, la tige 7 porte une rondelle ou bague 10 dont le diamètre extérieur est supérieur au diamètre interne de la perforation 8a. Par ailleurs, entre cette rondelle 10 et la butée d'actionnement 6, cette tige 7 traverse un manchon de friction 11 monté sur une patte horizontale 12 rendue solidaire de la bride fixe 4. Immediately below the spacer 8, the rod 7 carries a washer or ring 10 whose external diameter is greater than the internal diameter of the perforation 8a. Furthermore, between this washer 10 and the actuating stop 6, this rod 7 passes through a friction sleeve 11 mounted on a horizontal tab 12 made integral with the fixed flange 4.

Pour exposer le fonctionnement du dispositif de sécurité ci-dessus décrit, on partira de fig. 2 où l'on a représenté la tête porte-outil 1 au cours de son déplacement vers le bas (flèche F2) correspondant à sa phase d'approche et de travail. L'entretoise 8 prend appui, par sa face inférieure, contre la rondelle 10 solidaire de la tige 7, si bien que cette dernière se déplace vers le bas en même temps que la tête 1. On comprend dans ces conditions que la butée 6 portée par cette tige 7 est maintenue juste au-dessus de l'organe d'actionnement Sa du contacteur 5 fixé sur la tête 1. To explain the operation of the safety device described above, we will start from fig. 2 in which the tool head 1 has been shown during its downward movement (arrow F2) corresponding to its approach and work phase. The spacer 8 bears, by its underside, against the washer 10 integral with the rod 7, so that the latter moves downward at the same time as the head 1. It is understood under these conditions that the stop 6 carried by this rod 7 is held just above the actuating member Sa of the contactor 5 fixed on the head 1.

les choses restent en l'état tout au long de la descente de la tête 1. Par contre, des qu'au cours du mouvement de descente l'opérateur amorce la phase ascendante de retour (flèche F3 de fig. 3), l'organe de manoeuvre Sa vient porter contre le profil conique de la butée 6 qui tend ainsi à être repoussée vers le haut avec sa tige 7 ; toutefois, étant donné que celle-ci est freinée par le manchon de friction 11 porté par la patte fixe 12, la butée 6 vient repousser horizontalement (flèche F4) l'organe Sa à l'encontre de ses moyens élastiques de rappel, de sorte que le contacteur 5 est actionné et coupe l'alimentation des moteurs associés è l'outil et à la pompe d'arrosage. things remain as they are throughout the descent of the head 1. On the other hand, as soon as during the descent movement the operator initiates the ascending return phase (arrow F3 in fig. 3), the operating member Sa comes to bear against the conical profile of the stop 6 which thus tends to be pushed upwards with its rod 7; however, since the latter is braked by the friction sleeve 11 carried by the fixed lug 12, the stop 6 comes to push horizontally (arrow F4) the member Sa against its elastic return means, so that the contactor 5 is actuated and cuts the power supply to the motors associated with the tool and with the sprinkler pump.

Il doit être remarqué que cet actionnement survient dès l'amorce (distance h) du mouvement de remontée de la tête 1, et ce du fait que la butée 6, moyennant un réglage initial très précis le long de la tige 7, reste au contact de l'organe Sa tout au long de la descente de ladite tête et ne vient actionner celui-ci-que sous l'effet de la friction exercée par le manchon 11 (lui-même prévu réglable sur la tige). It should be noted that this actuation occurs from the start (distance h) of the upward movement of the head 1, and this because the stop 6, with very precise initial adjustment along the rod 7, remains in contact of the member Sa throughout the descent of said head and actuates it only under the effect of the friction exerted by the sleeve 11 (itself provided adjustable on the rod).

Si après cette amorce de mouvement de remontée, le mouvement est inversé et la tête 1 est déplacée à nouveau vers le bas par l'opérateur en même temps que celui--ci actionne le bouton de mise en marche usuel de la tronçonneuse, les choses sont ramenées à l'état représenté en fig. 2, en ce sens que la tige 7 est elle-même déplacée vers le bas dès que l'entretoise 8 revient au contact de la rondelle 10. La butée 6 se trouve en conséquence disposée juste au-dessus de l'organe de manoeuvre
Sa qui a été lui-même ramené à sa position antérieure sous l'action de ses moyens élastiques de rappel dès que le contacteur 5 s'est déplacé vers le bas avec la tête 1. Cette butée 6 sera donc apte à manoeuvrer à nouveau ce contacteur 5 dès l'amorce d'une nouvelle remontée.
If after this ascent movement begins, the movement is reversed and the head 1 is again moved down by the operator at the same time as the latter actuates the usual start button of the chainsaw, the things are brought back to the state shown in fig. 2, in the sense that the rod 7 is itself moved downwards as soon as the spacer 8 returns to contact with the washer 10. The stop 6 is consequently located just above the operating member
Sa which has itself been brought back to its previous position under the action of its elastic return means as soon as the contactor 5 has moved down with the head 1. This stop 6 will therefore be able to maneuver again this contactor 5 as soon as a new ascent begins.

En revanche, si à partir de la position illustrée en fig. 3 l'opérateur poursuit la remontée de la tête mobile 1 (flèche F5 de fig. 4), l'appui de l'organe Sa contre la butée tronconique 6 assure le déplacement vers la haut de ladite butée et de la tige 7. La tête 1 peut être ainsi amenée jusqu'à la fin de sa course haute ou bien n'être que partiellement remontée ; en tout état de cause l'opérateur pourra à tout moment effectuer une nouvelle course de travail en manoeuvrant le bouton de mise en marche pour la remise en mouvement du moteur d'entratnement de l'outil et de la pompe d'arrosage. On the other hand, if from the position illustrated in fig. 3 the operator continues to raise the movable head 1 (arrow F5 in fig. 4), the support of the member Sa against the frusto-conical stop 6 ensures the upward movement of said stop and of the rod 7. The head 1 can thus be brought to the end of its upper stroke or else be only partially raised; in any event, the operator can at any time carry out a new working stroke by operating the start button to restart the tool drive motor and the sprinkler pump.

Il est évidemment nécessaire que le schéma électrique de la tronçonneuse permette à tout moment, quelle que soit la position de l'organe mobile de manoeuvre du contacteur 5, la remise en état de fonctionnement des moteurs pour ltentrainement de l'outil et de la pompe, moyennant actionlement du bouton de mise en marche de la machine
Ce résultat est suscept ble d'être atteint à l'aide de différents moyens, notamment en associant au bouton précité et au contacteur 5 un relais logique du type flip-flop (par exemple celui connu sous la référence SL 150 de la parque de Fabrique ELECTROMATIC S-SYSTEM) qui ne change d'état que sous l'effet d'une impulsion dite à front montant".
It is obviously necessary that the electric diagram of the chainsaw allows at any time, whatever the position of the movable member for operating the contactor 5, to restore the operating condition of the motors for driving the tool and the pump. , by actuation of the machine start button
This result is likely to be achieved using various means, in particular by associating with the aforementioned button and with the contactor 5 a logic relay of the flip-flop type (for example that known under the reference SL 150 from the park of Fabrique ELECTROMATIC S-SYSTEM) which changes state only under the effect of a so-called rising edge pulse ".

Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple, et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents.  It should also be understood that the foregoing description has been given only by way of example, and that it in no way limits the field of the invention from which one would not depart by replacing the details of execution described by all other equivalents.

Claims (3)

REVENDICATIONS 1. Tronçonneuse ou autre machine dans laquelle l'outil tournant et son moteur d'entrainement sont montés sur une tête porte-outil animée d'un mouvement linéaire ou pendulaire, caractérisée en ce qu'elle comprend un dispositif de sécurité propre à faire automatiquement cesser l'entraînement de l'outil dès qu'en un point quelconque de la phase d'approche ou de travail de sa course la tête (1) amorce la phase de retour de ladite course. 1. Chainsaw or other machine in which the rotary tool and its drive motor are mounted on a tool-holder head driven by a linear or pendulum movement, characterized in that it comprises a safety device suitable for making automatically stop driving the tool as soon as at any point in the approach or work phase of its stroke the head (1) begins the return phase of said stroke. 2. Tronçonneuse suivant la revendication 1, caractérisée en ce que le dispositif de sécurité comprend un contacteur (5) porté par la tête (1) et dont l'organe chargé de manoeuvre (5ao est associé a une butée (6) qui sans l'actionner reste au contact dudit organe tout au long de la phase d'approche et de travail, mais qui est freinée lorsqu'telle se déplace en sens inverse sous l'action dudit organe de façon à assurer la commande de ce dernier et l'arrêt de l'alimentation du moteur. 2. Chainsaw according to claim 1, characterized in that the safety device comprises a contactor (5) carried by the head (1) and whose operating member (5ao is associated with a stop (6) which without l 'actuate remains in contact with said member throughout the approach and work phase, but which is braked when it moves in the opposite direction under the action of said member so as to ensure control of the latter and the engine power shutdown. 3. Tronçonneuse suivant la revendication 2, caractérisée en ce que la butée (6), établie à un profil tronconique pour repousser l'organe de manoeuvre (Sa) du contacteur (5), est portée par une tige (7) qui traverse un manchon de friction (11) monté sur le bâti fixe (2-3-4) et qui est soumise, par l'intermédiaire d'une rondelle d'appui (10) solidaire de ladite tige, au déplacement de la tête (1) dans le sens correspondant à la phase d'approche et de travail de ladite tête.  3. Chainsaw according to claim 2, characterized in that the stop (6), established at a frustoconical profile to push the operating member (Sa) of the contactor (5), is carried by a rod (7) which passes through a friction sleeve (11) mounted on the fixed frame (2-3-4) and which is subjected, by means of a support washer (10) integral with said rod, to the displacement of the head (1) in the direction corresponding to the approach and working phase of said head.
FR8407248A 1984-05-07 1984-05-07 Improvements to motor saws and other machines equipped with a tool-carrying head with a linear or pendular travel Withdrawn FR2563758A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8407248A FR2563758A1 (en) 1984-05-07 1984-05-07 Improvements to motor saws and other machines equipped with a tool-carrying head with a linear or pendular travel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8407248A FR2563758A1 (en) 1984-05-07 1984-05-07 Improvements to motor saws and other machines equipped with a tool-carrying head with a linear or pendular travel

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FR2563758A1 true FR2563758A1 (en) 1985-11-08

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB624258A (en) * 1947-06-20 1949-06-01 Arthur Wilfred Hunt Improvements in or relating to safety devices for saws, lathes and like machines
AT293711B (en) * 1969-02-17 1971-10-25 Johann Sporer Portable circular saw
US4033218A (en) * 1976-06-04 1977-07-05 Spanjer Brothers, Inc. Table-saw guard
DE2800403A1 (en) * 1978-01-05 1979-07-19 Bosch Gmbh Robert Operator protection on press or drilling machine tool - has probe which, on operator contact, causes tool feed to reverse
FR2484312A1 (en) * 1980-06-12 1981-12-18 Tostain Jacques Cutting grindstone wear compensator - has hydraulic circuit to detect difference between grindstone and ram speeds on completing cut

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB624258A (en) * 1947-06-20 1949-06-01 Arthur Wilfred Hunt Improvements in or relating to safety devices for saws, lathes and like machines
AT293711B (en) * 1969-02-17 1971-10-25 Johann Sporer Portable circular saw
US4033218A (en) * 1976-06-04 1977-07-05 Spanjer Brothers, Inc. Table-saw guard
DE2800403A1 (en) * 1978-01-05 1979-07-19 Bosch Gmbh Robert Operator protection on press or drilling machine tool - has probe which, on operator contact, causes tool feed to reverse
FR2484312A1 (en) * 1980-06-12 1981-12-18 Tostain Jacques Cutting grindstone wear compensator - has hydraulic circuit to detect difference between grindstone and ram speeds on completing cut

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