FR2749786A1 - Portable welding clamp for welding sheets of synthetic films - Google Patents
Portable welding clamp for welding sheets of synthetic films Download PDFInfo
- Publication number
- FR2749786A1 FR2749786A1 FR9607574A FR9607574A FR2749786A1 FR 2749786 A1 FR2749786 A1 FR 2749786A1 FR 9607574 A FR9607574 A FR 9607574A FR 9607574 A FR9607574 A FR 9607574A FR 2749786 A1 FR2749786 A1 FR 2749786A1
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- FR
- France
- Prior art keywords
- lever
- welding
- clamp
- branch
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8163—Self-aligning to the joining plane, e.g. mounted on a ball and socket
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/02—Jaws
- B25B7/04—Jaws adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
- B25B7/123—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears with self-locking toggle levers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/861—Hand-held tools
- B29C66/8614—Tongs, pincers or scissors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/38—Impulse heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
- B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/60—Uniting opposed surfaces or edges; Taping
- B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
Description
La présente invention concerne une pince à souder portative, conçue pour l'assemblage par soudure d'au moins deux épaisseurs de film synthétique souple thermosoudable. The present invention relates to a portable welding gun, designed for the assembly by welding of at least two thicknesses of flexible heat-sealable synthetic film.
Cette pince est destinée au soudage de matières non soudables par soudure haute fréquence, notamment au soudage de films en polyéthylène, qui nécessitent un soudage par impulsions.These pliers are intended for welding non-weldable materials by high frequency welding, in particular for welding polyethylene films, which require pulse welding.
En particulier, l'invention a pour objet une pince de soudage portative adaptée pour la confection et/ou la fermeture de gaines, manches, housses et emballages souples similaires destinés à recevoir des déchets nucléaires, industriels ou hospitaliers, ou autres produits et objets analogues, plus ou moins contaminés ou polluants. Comme on le comprend aisément, les soudures à réaliser dans ce domaine d'application doivent être d'une qualité irréprochable, de manière à garantir une sécurité absolue, vis-à-vis des risques de contamination et de pollution. In particular, the subject of the invention is a portable welding clamp suitable for making and / or closing sheaths, sleeves, covers and similar flexible packaging intended to receive nuclear, industrial or hospital waste, or other products and similar objects , more or less contaminated or polluting. As can easily be understood, the welds to be produced in this field of application must be of impeccable quality, so as to guarantee absolute security with respect to the risks of contamination and pollution.
De manière générale, on connaît déjà des pinces à souder portatives, qui comprennent deux branches opposées articulées l'une à l'autre, en un point intermédiaire, selon un axe transversal, les parties antérieures des deux branches constituant respectivement les supports de deux mâchoires de soudage opposées avec résistance électrique chauffante, tandis que les parties postérieures des deux branches forment des poignées de préhension. Generally, portable welding tongs are already known, which comprise two opposite branches articulated to each other, at an intermediate point, along a transverse axis, the anterior parts of the two branches constituting the supports of two jaws respectively. of opposite welding with electric heating resistance, while the posterior parts of the two branches form grip handles.
Des pinces à souder de ce genre ont été déjà décrites dans d'assez nombreux documents, par exemple brevet anglais 1208744, demande de brevet allemand 1955599, brevets américains 2759090, 3322603 et 4436567. Welding tongs of this kind have already been described in quite a number of documents, for example English patent 1208744, German patent application 1955599, American patents 2759090, 3322603 and 4436567.
Dans certains cas, les deux mâchoires de soudage s'étendent selon la direction longitudinale des branches correspondantes, qui possèdent une conformation générale rectiligne. Dans d'autres cas, les deux mâchoires de soudage s'étendent perpendiculairement à la direction principale des deux branches correspondantes, lesquelles présentent alors une configuration en "T". D'une manière généralement connue, l'une des deux mâchoires de soudage peut être montée oscillante, autour d'un axe transversal situé à mi-longueur de cette mâchoire, sur la branche correspondante de la pince; cette disposition garantit le parallélisme des deux mâchoires, lors de l'utilisation de la pince à souder.In some cases, the two welding jaws extend in the longitudinal direction of the corresponding branches, which have a generally rectilinear conformation. In other cases, the two welding jaws extend perpendicular to the main direction of the two corresponding branches, which then have a "T" configuration. In a generally known manner, one of the two welding jaws can be mounted to oscillate, about a transverse axis located halfway along this jaw, on the corresponding branch of the clamp; this arrangement guarantees the parallelism of the two jaws, when using the welding tongs.
Un problème restant à résoudre, dans ce genre de pinces à souder, est d'obtenir non seulement une pression uniforme des deux mâchoires de soudage, de part et d'autre du matériau à souder, mais encore une pression de valeur suffisamment élevée, donc un effort de serrage élevé, sans demander à l'opérateur d'exercer un effort manuel trop élevé sur les poignées de la pince. A problem still to be solved in this type of welding tongs is to obtain not only a uniform pressure of the two welding jaws on either side of the material to be welded, but also a pressure of sufficiently high value, therefore a high clamping force, without asking the operator to exert too high a manual force on the handles of the pliers.
Certaines réalisations connues comprennent un ressort disposé entre les deux branches de la pince à souder, et agissant dans le sens du serrage des mâchoires de soudage l'une contre l'autre. Dans ce cas, l'opérateur doit exercer un effort manuel élevé pour ouvrir la pince, en s'opposant à la force du ressort, pour introduire entre les mâchoires le matériau à souder. Some known embodiments include a spring disposed between the two branches of the welding gun, and acting in the direction of tightening the welding jaws against each other. In this case, the operator must exert a high manual effort to open the clamp, opposing the force of the spring, to introduce the material to be welded between the jaws.
A l'inverse, d'autres réalisations connues comportent un ressort agissant dans le sens de l'ouverture de la pince, ou ne comportent aucun ressort, de sorte que tout l'effort de serrage des mâchoires pour le soudage doit être exercé manuellement. Il en résulte que la force de serrage n'est pas de valeur constante, et que cette force reste de toute façon limitée d'une valeur insuffisante, de l'ordre de 10 kgf. Conversely, other known embodiments include a spring acting in the direction of opening of the clamp, or do not include any spring, so that all the clamping force of the jaws for welding must be exerted manually. It follows that the clamping force is not of constant value, and that this force remains anyway limited by an insufficient value, of the order of 10 kgf.
La présente invention vise à éliminer tous ces inconvénients, en fournissant une pince à souder portative du genre considéré, qui en position de fermeture permet d'exercer une pression plus forte et constante des mâchoires sur le matériau à souder, sans effort manuel excessif, quelle que soit l'épaisseur de ce matériau, et qui se maintient aussi d'elle-même en position d'ouverture, pour permettre une introduction aisée du matériau à souder. The present invention aims to eliminate all these drawbacks, by providing a portable welding pliers of the type considered, which in the closed position allows to exert a stronger and constant pressure of the jaws on the material to be welded, without excessive manual effort, whatever whatever the thickness of this material, and which also maintains itself in the open position, to allow easy introduction of the material to be welded.
A cet effet, l'invention a essentiellement pour objet une pince à souder portative comprenant deux branches opposées articulées l'une à l'autre, en un point intermédiaire, selon une axe transversal, les parties antérieures des deux branches constituant respectivement les supports de deux mâchoires de soudage opposées avec résistance électrique chauffante, tandis que les parties postérieures des deux branches forment des poignées de préhension, cette pince à souder étant caractérisée en ce que
- une part, l'une des mâchoires de soudage est
montée oscillante, autour d'un axe transversal
situé sensiblement à mi-longueur de cette
mâchoire, et avec un jeu, sur la branche
correspondante de la pince, des moyens à
ressort agissant sur cette mâchoire de part et
d'autre de son axe d'oscillation, et
- d'autre part, les parties postérieures des deux
branches de la pince sont associées à un
dispositif à leviers, pourvu de moyens à
ressort permettant de maintenir la pince en
position fermée de soudage par effet de
coincement mécanique, et apte aussi à maintenir
la pince en position ouverte.To this end, the invention essentially relates to a portable welding gun comprising two opposite branches hinged to each other, at an intermediate point, along a transverse axis, the anterior parts of the two branches respectively constituting the supports of two opposite welding jaws with electric heating resistance, while the rear parts of the two branches form grips, this welding tongs being characterized in that
- firstly, one of the welding jaws is
oscillating rise, around a transverse axis
located substantially mid-length of this
jaw, and with a game, on the branch
corresponding pliers, means to
spring acting on this part jaw and
on the other side of its axis of oscillation, and
- on the other hand, the posterior parts of the two
pliers branches are associated with a
lever device, provided with means for
spring to hold the clamp in place
closed position of welding by
mechanical jamming, and also able to maintain
the clamp in the open position.
Dans une forme de réalisation préférée de cette pièce à souder portative, l'une des branches est prolongée vers l'arrière, au-delà de la région de son axe d'articulation à l'autre branche, par une partie postérieure allongée formant poignée, tandis que l'autre branche est interrompue dans la région de cet axe d'articulation, et le dispositif à leviers comprend
- un levier formant poignée articulé à l'extrémité
postérieure de cette autre branche et situé en
regard de la partie postérieure de la première
branche,
- une biellette reliant un point intermédiaire du
levier à un point proche de l'extrémité libre de
la partie postérieure de la première branche, et
- un ressort à gaz monté entre un point de cette
première branche et un point intermédiaire du
levier, l'effet de coincement en position fermée étant obtenu par le fait que l'axe d'articulation de la biellette sur le levier passe du côté intérieur de la ligne droite reliant l'axe d'articulation du levier sur ladite autre branche à l'axe d'articulation de la biellette sur la partie postérieure de la première branche.In a preferred embodiment of this portable welding piece, one of the branches is extended rearward, beyond the region of its axis of articulation to the other branch, by an elongated rear part forming a handle. , while the other branch is interrupted in the region of this axis of articulation, and the lever device comprises
- a lever forming a hinged handle at the end
posterior of this other branch and located in
look at the posterior part of the first
plugged,
- a link connecting an intermediate point of the
lever at a point near the free end of
the posterior part of the first branch, and
- a gas spring mounted between a point of this
first branch and an intermediate point of
lever, the jamming effect in the closed position being obtained by the fact that the axis of articulation of the link on the lever passes on the inside of the straight line connecting the axis of articulation of the lever on said other branch to the axis of articulation of the link on the posterior part of the first branch.
Avantageusement, un levier auxiliaire est encore monté pivotant à l'extrémité libre du levier précité, l'actionnement du levier auxiliaire commandant le retour de la pince de sa position de fermeture vers sa position d'ouverture. Advantageously, an auxiliary lever is also pivotally mounted at the free end of the aforementioned lever, the actuation of the auxiliary lever controlling the return of the clamp from its closed position to its open position.
Grâce au dispositif à leviers, la pince à souder se maintient d'elle-même en position fermée, sans effort manuel, et les ressorts associés à la mâchoire montée oscillante créent un effort de serrage des mâchoires qui peut être élevé, atteignant par exemple une valeur de l'ordre de 30 kgf (à comparer avec la force de l'ordre de 10 kgf habituellement obtenue). Thanks to the lever device, the welding gun maintains itself in the closed position, without manual effort, and the springs associated with the oscillating jaw create a jaw tightening force which can be high, reaching for example a value of the order of 30 kgf (to be compared with the force of the order of 10 kgf usually obtained).
Lorsque la soudure est effectuée, il suffit à l'opérateur d'actionner le levier auxiliaire pour ouvrir la pince, en supprimant l'effet de coincement, le ressort à gaz assistant ce mouvement tout en l'amortissant. When the welding is done, the operator just needs to activate the auxiliary lever to open the clamp, eliminating the jamming effect, the gas spring assisting this movement while damping it.
Parvenue en position d'ouverture, la pince s'y maintient d'elle-même, ce qui facilite l'introduction du matériau à souder entre les deux mâchoires.Once in the open position, the clamp keeps there by itself, which facilitates the introduction of the material to be welded between the two jaws.
Dans l'ensemble, la pince à souder objet de l'invention peut être actionnée avec des efforts manuels limités aussi bien dans leur intensité que dans leur durée d'application, puisqu'il n'est nécessaire d'exercer un effort ni lorsque la pince est ouverte, ni lorsque la pince est fermée, ceci tout en augmentant la force de serrage exercée par les mâchoires en position fermée, cette force se trouvant pratiquement triplée par rapport à sa valeur habituelle. On the whole, the welding tongs object of the invention can be actuated with manual efforts limited both in their intensity and in their duration of application, since it is not necessary to exert an effort or when the clamp is open, nor when the clamp is closed, this while increasing the clamping force exerted by the jaws in the closed position, this force being practically tripled compared to its usual value.
Il est à noter que l'augmentation de la pression des mâchoires, ainsi obtenue, permet de diminuer la température de soudage, donc d'effectuer le soudage en consommant une puissance électrique moins élevée, tout en préservant les résistances de soudage et leurs isolants, donc en augmentant leur durée de vie. It should be noted that the increase in the pressure of the jaws, thus obtained, makes it possible to decrease the welding temperature, therefore to perform the welding by consuming a lower electrical power, while preserving the welding resistances and their insulators, therefore by increasing their lifespan.
De toute façon, l'invention sera mieux comprise, et d'autres caractéristiques et avantages seront mis en évidence, à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple, une forme de réalisation de cette pince à souder portative
Figure 1 est une vue générale, de côté, d'une pince à souder conforme à la présente invention, représentée en position fermée;
Figure 2 est une vue à échelle agrandie de la partie arrière de la pince à souder de figure 1, en position de fermeture;
Figure 3 est une vue similaire à figure 2, mais correspondant à la position d'ouverture de la pince à souder.In any case, the invention will be better understood, and other characteristics and advantages will be highlighted, with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of example, a form of realization of this portable welding pliers
Figure 1 is a general side view of a welding pliers according to the present invention, shown in the closed position;
Figure 2 is an enlarged view of the rear part of the welding tongs of Figure 1, in the closed position;
Figure 3 is a view similar to Figure 2, but corresponding to the open position of the welding tongs.
La pince à souder, représentée au dessin, comprend deux branches opposées 1 et 2, de configuration générale rectiligne et de section courante en "U", articulées l'une à l'autre autour d'un axe transversal 3, dans la partie centrale de la pince. Les parties antérieures des deux branches 1 et 2 supportent, respectivement, deux mâchoires de soudage rectilignes opposées 4 et 5. The welding gun, shown in the drawing, comprises two opposite branches 1 and 2, of generally rectilinear configuration and of common "U" section, articulated to each other around a transverse axis 3, in the central part. of the pliers. The front parts of the two branches 1 and 2 support, respectively, two opposite rectilinear welding jaws 4 and 5.
La première mâchoire de soudage 4 est montée oscillante, autour d'un axe transversal 6 situé à milongueur de cette mâchoire 4, sur la première branche 1 de la pince à souder. L'articulation centrale de la mâchoire 4, autour de l'axe 6, possède un jeu dans la direction verticale (par référence au dessin). Deux ressorts 7 et 8, montés de part et d'autre de l'axe d'articulation 6 et prenant appui sur la branche 1, exercent leur poussée sur la mâchoire 4. The first welding jaw 4 is mounted to oscillate, about a transverse axis 6 located in the middle of this jaw 4, on the first branch 1 of the welding tongs. The central articulation of the jaw 4, around the axis 6, has a play in the vertical direction (with reference to the drawing). Two springs 7 and 8, mounted on either side of the hinge pin 6 and bearing on the branch 1, exert their thrust on the jaw 4.
L'autre mâchoire de soudage 5 est fixée sur la seconde branche 2 de la pince à souder, au moyen de deux vis 9 et 10. The other welding jaw 5 is fixed to the second branch 2 of the welding gun, by means of two screws 9 and 10.
Cette disposition garantit, dans la position fermée de la pince représentée sur la figure 1, une pression équilibrée et constante de la première mâchoire de soudage 4 sur la seconde mâchoire de soudage 5, quelle que soit ltépaisseur du matériau à souder introduit entre les deux mâchoires 4 et 5. This arrangement guarantees, in the closed position of the clamp shown in Figure 1, a balanced and constant pressure of the first welding jaw 4 on the second welding jaw 5, regardless of the thickness of the material to be welded introduced between the two jaws 4 and 5.
Les extrémités libres antérieures des deux branches 1 et 2 possèdent des becs respectifs 11 et 12, tournés l'un vers l'autre, qui protègent les extrémités correspondantes des deux mâchoires de soudage 4 et 5 contre les chocs éventuels. The anterior free ends of the two branches 1 and 2 have respective spouts 11 and 12, facing one another, which protect the corresponding ends of the two welding jaws 4 and 5 against possible shocks.
Entre les extrémités postérieures des deux mâchoires de soudage 4 et 5, et la région de l'axe d'articulation 3 des deux branches 1 et 2, est ménagée une zone libre 13 permettant de loger et de retenir une portion enroulée de film synthétique, dans certaines utilisations de la pince à souder. Between the rear ends of the two welding jaws 4 and 5, and the region of the articulation axis 3 of the two branches 1 and 2, a free zone 13 is formed, making it possible to house and retain a wound portion of synthetic film, in some uses of the welding gun.
La première branche 1 de cette pince est prolongée vers l'arrière, au-delà de la région de l'axe d'articulation 3, par une partie postérieure allongée 14, formant poignée. The first branch 1 of this clamp is extended rearward, beyond the region of the hinge pin 3, by an elongated rear part 14, forming a handle.
La seconde branche 2 est interrompue dans la région de l'axe d'articulation 3; un levier 15, situé en regard de la partie postérieure 14 de la première branche 1 et servant lui aussi de poignée, est articulé à l'extrémité postérieure de la seconde branche 2, autour d'un axe transversal 16, parallèle à l'axe d'articulation 3 des deux branches 1 et 2. Une biellette 17, reliant le levier 15 à la partie postérieure 14 de la première branche 1, est articulée d'une part autour d'un axe 18 en un point intermédiaire du levier 15, et d'autre part autour d'un axe 19 en un point proche de l'extrémité libre de la partie postérieure 14 de la branche 1. L'extrémité de la biellette 17 située du côté de l'axe 18 présente un bec 20, apte à coopérer avec une butée 21 portée par le levier 15. The second branch 2 is interrupted in the region of the hinge axis 3; a lever 15, located opposite the rear part 14 of the first branch 1 and also serving as a handle, is articulated at the rear end of the second branch 2, around a transverse axis 16, parallel to the axis articulation 3 of the two branches 1 and 2. A link 17, connecting the lever 15 to the rear part 14 of the first branch 1, is articulated on the one hand around an axis 18 at an intermediate point of the lever 15, and on the other hand around an axis 19 at a point close to the free end of the rear part 14 of the branch 1. The end of the link 17 located on the side of the axis 18 has a spout 20, able to cooperate with a stop 21 carried by the lever 15.
Entre ce levier 15, d'une part, et la partie postérieure 14 de la première branche 1, d'autre part, est encore monté un ressort à gaz 22, qui est articulé autour d'un axe 23 en un point intermédiaire du levier 15, et autour d'un axe 24 à la partie 14 de la branche 1, à une distance relativement faible de l'axe d'articulation 3 des deux branches 1 et 2. Between this lever 15, on the one hand, and the rear part 14 of the first branch 1, on the other hand, a gas spring 22 is further mounted, which is articulated around an axis 23 at an intermediate point of the lever 15, and around an axis 24 at the part 14 of the branch 1, at a relatively small distance from the articulation axis 3 of the two branches 1 and 2.
A l'extrémité libre du levier 15 est articulé, autour d'un dernier axe 25 parallèle aux précédents, un levier auxiliaire 26 dont l'un des bras, situé sensiblement dans l'alignement du levier 15, est pourvu d'un prolongement 27 replié en "U", servant de partie d'actionnement. L'autre bras du levier auxiliaire 26, se superposant au levier 15, présente à son extrémité un évidement 28 dans lequel est engagé un ergot 29 solidaire du levier 15, ce qui permet de limiter le pivotement du levier auxiliaire 26 relativement au levier 15. At the free end of the lever 15 is articulated, around a last axis 25 parallel to the previous ones, an auxiliary lever 26 of which one of the arms, located substantially in alignment with the lever 15, is provided with an extension 27 folded in "U", serving as actuation part. The other arm of the auxiliary lever 26, superimposed on the lever 15, has at its end a recess 28 in which is engaged a lug 29 integral with the lever 15, which makes it possible to limit the pivoting of the auxiliary lever 26 relative to the lever 15.
Enfin, la partie postérieure 14 de la première branche 1 porte un interrupteur électrique à boutonpoussoir 30, pour la commande du processus de soudage. Finally, the rear part 14 of the first branch 1 carries an electrical push button switch 30, for controlling the welding process.
La pince de soudage, précédemment décrite, est raccordée électriquement, par un cordon, à un coffret d'alimentation et de commande (non représenté). The welding clamp, previously described, is electrically connected, by a cord, to a power and control box (not shown).
En position de repos, sous l'action du ressort à gaz 22, la pince à souder est maintenue en position ouverte, représentée sur la figure 3 : le levier 15 se trouve alors écarté de la partie postérieure 14 de la branche 1, les deux mâchoires de soudage 4 et 5 sont elles-mêmes écartées l'une de l'autre, et aucun effort ne doit être exercé par l'opérateur pour l'introduction du matériau à sonder entre ces deux mâchoires 4 et 5. In the rest position, under the action of the gas spring 22, the welding tongs are kept in the open position, represented in FIG. 3: the lever 15 is then moved away from the rear part 14 of the branch 1, both welding jaws 4 and 5 are themselves separated from each other, and no effort must be exerted by the operator for the introduction of the material to be probed between these two jaws 4 and 5.
Pour effectuer le soudage, l'opérateur serre la double poignée formée par la partie postérieure 14 de la branche 1 et par le levier 15, ce qui déforme le quadrilatère défini par les quatre axes d'articulation 3, 16, 18 et 19, jusqu'à ce que l'axe 18 passe du côté intérieur de la ligne droite reliant les axes 16 et 19. Au cours de ce mouvement, les parties antérieures des deux branches 1 et 2 se rapprochent, et finalement, par effet de coincement, la pince se maintient d'elle-même dans la position de fermeture, représentée aux figures 1 et 2. Le matériau à souder est alors serré, avec une forte pression, entre les deux mâchoires 4 et 5 dont l'une est soumise à l'action des ressorts 7 et 8, et il suffit à l'opérateur d'actionner le bouton-poussoir de l'interrupteur 30 pour provoquer manuellement le début du processus de soudage, c'est-à-dire l'alimentation électrique des résistances des deux mâchoires de soudage 4 et 5. To perform the welding, the operator squeezes the double handle formed by the rear part 14 of the branch 1 and by the lever 15, which deforms the quadrilateral defined by the four articulation axes 3, 16, 18 and 19, up to 'so that the axis 18 passes on the inner side of the straight line connecting the axes 16 and 19. During this movement, the anterior parts of the two branches 1 and 2 approach each other, and finally, by wedging effect, the clamp maintains itself in the closed position, shown in Figures 1 and 2. The material to be welded is then clamped, with high pressure, between the two jaws 4 and 5, one of which is subjected to action of springs 7 and 8, and it suffices for the operator to actuate the push button of the switch 30 to manually cause the start of the welding process, that is to say the electrical supply of the resistances of the two welding jaws 4 and 5.
Lorsque la soudure est terminée, après un temps de refroidissement approprié, il suffit à l'opérateur d'actionner le levier auxiliaire 26, comme indiqué par une flèche F sur la figure 2, pour déplacer aussi le levier 15 et provoquer l'ouverture de la pince. Au cours du mouvement d'ouverture, le ressort à gaz 22 joue un rôle d'amortisseur et évite un mouvement trop rapide. Ce mouvement d'ouverture de la pince est limité par l'arrivée du bec 20 de la biellette 17 contre la butée 21 (voir figure 3). When the welding is finished, after an appropriate cooling time, the operator need only actuate the auxiliary lever 26, as indicated by an arrow F in FIG. 2, to also move the lever 15 and cause the opening of the clamp. During the opening movement, the gas spring 22 acts as a shock absorber and prevents too rapid movement. This opening movement of the clamp is limited by the arrival of the spout 20 of the rod 17 against the stop 21 (see Figure 3).
On notera que, grâce au prolongement replié en "U" 27 du levier auxiliaire 26, il n'est pas nécessaire d'utiliser une deuxième main pour ouvrir la pince. Il suffit à l'opérateur, tenant la pince par une main entre la partie 14 et le levier 15, d'utiliser le dos de ses doigts pour actionner le levier auxiliaire 26 dans le sens de la flèche F. Note that, thanks to the folded extension "U" 27 of the auxiliary lever 26, it is not necessary to use a second hand to open the clamp. It suffices for the operator, holding the clamp with one hand between the part 14 and the lever 15, to use the back of his fingers to actuate the auxiliary lever 26 in the direction of the arrow F.
S'il s'agit de réaliser une soudure sur des films d'étendue importante, ceux-ci sont d'abord enroulés dans la zone 13, puis déroulés au fur et à mesure de la réalisation de tronçons de soudure successifs, effectuée en "reculant" la pince à souder. On obtient ainsi des soudures de toutes longueur désirée, et de largeur relativement importante par exemple d'environ huit millimètres, qu'il est ensuite aisé de couper longitudinalement, à l'aide de ciseaux. If it is a question of carrying out a welding on films of large extent, these are first wound up in the zone 13, then unwound as and when successive sections of welding are carried out, carried out in " pulling back the welding gun. Welds of any desired length are thus obtained, and of relatively large width, for example of about eight millimeters, which it is then easy to cut longitudinally, using scissors.
Comme il va de soi, l'invention ne se limite pas à la seule forme de réalisation de cette pince à souder portative qui a été décrite ci-dessus, à titre d'exemples; elle en embrasse, au contraire, toutes les variantes respectant le même principe. En particulier, l'on ne s'éloignerait pas du cadre de l'invention en prévoyant que les deux mâchoires de soudage s'étendent non pas selon la direction longitudinale des branches de la pince, mais perpendiculairement à la direction principale des deux branches, selon une configuration en "T", le mécanisme de la pince n'étant pas modifié. It goes without saying that the invention is not limited to the only embodiment of this portable welding pliers which has been described above, by way of examples; on the contrary, it embraces all the variants respecting the same principle. In particular, it would not depart from the scope of the invention by providing that the two welding jaws extend not in the longitudinal direction of the arms of the clamp, but perpendicular to the main direction of the two arms, according to a "T" configuration, the clamp mechanism not being modified.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9607574A FR2749786B1 (en) | 1996-06-13 | 1996-06-13 | PORTABLE WELDING PLIERS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9607574A FR2749786B1 (en) | 1996-06-13 | 1996-06-13 | PORTABLE WELDING PLIERS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2749786A1 true FR2749786A1 (en) | 1997-12-19 |
| FR2749786B1 FR2749786B1 (en) | 1998-08-07 |
Family
ID=9493170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9607574A Expired - Fee Related FR2749786B1 (en) | 1996-06-13 | 1996-06-13 | PORTABLE WELDING PLIERS |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2749786B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998057798A1 (en) * | 1997-06-18 | 1998-12-23 | S.C. Johnson Home Storage, Inc. | Linear clamping assembly for bag sealing machines |
| CN108891034A (en) * | 2018-07-03 | 2018-11-27 | 王冲 | A kind of hospital handheld Portable thermal clutch |
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| US2341489A (en) * | 1941-02-04 | 1944-02-08 | Tornborg Josef Emanuel Melker | Jawed tool |
| US2385654A (en) * | 1943-05-05 | 1945-09-25 | Gunnar F Seashore | Wrench |
| US2401991A (en) * | 1942-02-25 | 1946-06-11 | British Insulated Cables Ltd | Machine for compressing and heating electrically thermoplastic materials |
| US2521276A (en) * | 1946-03-28 | 1950-09-05 | Friedrich W Lampe | Toggle action self-locking wrench and/or nonlocking pliers |
| US2759090A (en) * | 1952-10-20 | 1956-08-14 | Frye Jack | Heat sealing and cutting device |
| FR1138817A (en) * | 1955-10-03 | 1957-06-20 | Device for bonding transmission belts and similar applications | |
| US2853910A (en) * | 1956-11-30 | 1958-09-30 | Petersen William | Latch means for plier type toggle wrench |
| FR1257626A (en) * | 1954-12-28 | 1961-04-07 | Improvements made to heating clamps intended for hot bonding materials coated with thermo-adhesive products, in particular various fabrics and papers | |
| DE1986783U (en) * | 1968-06-06 | Karl-Heinz Kalifaß, 7440 Nürtingen | Welding device for manufacturing and closing packs made of plastic film | |
| FR2374463A1 (en) * | 1976-12-15 | 1978-07-13 | Raychem Corp | CLOSING PROCEDURE AND CLAMP FOR ITS IMPLEMENTATION |
| DE29505465U1 (en) * | 1995-04-06 | 1995-06-14 | Dingeldein, Klaus, 64720 Michelstadt | Handheld device for the selective vulcanization of elastomer sheets |
| DE19518492A1 (en) * | 1994-05-20 | 1995-11-23 | Facom | Adjustable locking pliers for holding or gripping workpieces |
-
1996
- 1996-06-13 FR FR9607574A patent/FR2749786B1/en not_active Expired - Fee Related
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1986783U (en) * | 1968-06-06 | Karl-Heinz Kalifaß, 7440 Nürtingen | Welding device for manufacturing and closing packs made of plastic film | |
| US2341489A (en) * | 1941-02-04 | 1944-02-08 | Tornborg Josef Emanuel Melker | Jawed tool |
| US2401991A (en) * | 1942-02-25 | 1946-06-11 | British Insulated Cables Ltd | Machine for compressing and heating electrically thermoplastic materials |
| US2385654A (en) * | 1943-05-05 | 1945-09-25 | Gunnar F Seashore | Wrench |
| US2521276A (en) * | 1946-03-28 | 1950-09-05 | Friedrich W Lampe | Toggle action self-locking wrench and/or nonlocking pliers |
| US2759090A (en) * | 1952-10-20 | 1956-08-14 | Frye Jack | Heat sealing and cutting device |
| FR1257626A (en) * | 1954-12-28 | 1961-04-07 | Improvements made to heating clamps intended for hot bonding materials coated with thermo-adhesive products, in particular various fabrics and papers | |
| FR1138817A (en) * | 1955-10-03 | 1957-06-20 | Device for bonding transmission belts and similar applications | |
| US2853910A (en) * | 1956-11-30 | 1958-09-30 | Petersen William | Latch means for plier type toggle wrench |
| FR2374463A1 (en) * | 1976-12-15 | 1978-07-13 | Raychem Corp | CLOSING PROCEDURE AND CLAMP FOR ITS IMPLEMENTATION |
| DE19518492A1 (en) * | 1994-05-20 | 1995-11-23 | Facom | Adjustable locking pliers for holding or gripping workpieces |
| DE29505465U1 (en) * | 1995-04-06 | 1995-06-14 | Dingeldein, Klaus, 64720 Michelstadt | Handheld device for the selective vulcanization of elastomer sheets |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998057798A1 (en) * | 1997-06-18 | 1998-12-23 | S.C. Johnson Home Storage, Inc. | Linear clamping assembly for bag sealing machines |
| US5964688A (en) * | 1997-06-18 | 1999-10-12 | Woody; Clark M. | Linear clamping assembly for bag sealing machines |
| CN108891034A (en) * | 2018-07-03 | 2018-11-27 | 王冲 | A kind of hospital handheld Portable thermal clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2749786B1 (en) | 1998-08-07 |
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| Date | Code | Title | Description |
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| ST | Notification of lapse |
Effective date: 20070228 |