EP0508850A1 - Crimping pliers for tubes and the like - Google Patents

Crimping pliers for tubes and the like Download PDF

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Publication number
EP0508850A1
EP0508850A1 EP92400784A EP92400784A EP0508850A1 EP 0508850 A1 EP0508850 A1 EP 0508850A1 EP 92400784 A EP92400784 A EP 92400784A EP 92400784 A EP92400784 A EP 92400784A EP 0508850 A1 EP0508850 A1 EP 0508850A1
Authority
EP
European Patent Office
Prior art keywords
arm
axis
blades
notch
pliers
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
Application number
EP92400784A
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German (de)
French (fr)
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EP0508850B1 (en
Inventor
Roger Malagnoux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierre Grehal et Cie SA
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Pierre Grehal et Cie SA
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Filing date
Publication date
Application filed by Pierre Grehal et Cie SA filed Critical Pierre Grehal et Cie SA
Publication of EP0508850A1 publication Critical patent/EP0508850A1/en
Application granted granted Critical
Publication of EP0508850B1 publication Critical patent/EP0508850B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing

Definitions

  • the present invention relates to a new clamping pliers for shaping the end of a pipe to be engaged inside another pipe initially of the same diameter.
  • the shaping for the constriction of a pipe end is an operation which must be carried out frequently on site during the assembly of the pipe elements for the transport and distribution of air or other gases, in particular in air conditioning installations.
  • constriction is carried out over a significant length, for example of the order of 5 cm.
  • the force to be applied to shrink the metal by waving it depends on several factors, in particular the hardness of the metal, its thickness and of course the length over which the shrinkage must be carried out. In all cases, the effort to apply is important.
  • the invention creates a hand clamp which makes it possible to achieve this constriction by exerting on the handles a force proportionally low compared to that which is applied by the clamp, that is to say that it allows to work with a high leverage ratio, while making it possible for the necking to be carried out over a significant length.
  • the constriction pliers for pipes and the like is characterized by a first arm having, in section, the shape of a U and forming a spout in which a notch delimiting edges forming blades is produced, said first arm being articulated to a second arm by an axis disposed near the end of the spout, said second arm delimiting ramps for actuating at least one blade articulated on an axis of the first arm, this axis being disposed beyond the notch
  • Fig. 1 is a perspective of two sections of pipe, one of which is constricted to allow its engagement in the other.
  • Fig. 2 is a side elevation of the necking pliers according to the invention.
  • Fig. 3 is a top view along line III-III of FIG. 2.
  • Fig. 4 is an end view seen along line IV-IV of FIG. 2.
  • Fig. 5 is a section seen along line V-V of FIG. 3.
  • Fig. 6 is an elevation similar to FIG. 2 showing the clamp in the open position.
  • Fig. 1 shows two sections of pipe 1 and 2 to be engaged one inside the other. Originally, the two sections are of the same diameter and one of them, the section 2, is constricted at its end 2a by the formation of corrugations reducing its outside diameter to cause it to coincide with the inside diameter of the section 1.
  • the clamp has two arms 3, 4 constituted by fittings bent in U of different widths so that one of the arms can be engaged in the other by interlocking at least at their end at which said two arms are articulated around an axis 5.
  • One of the arms that designated by 3 in the drawing, is provided with an axis 6 for a spring 7 of the pin type which tends to keep said arms separated from one another as illustrated in FIG. 6 by rotating them around axis 5.
  • the arms 3, 4 form or are provided with handles 8, 9, preferably in flexible material, and with a clip 10 for joining them when the clamp is unused as shown in FIG. 2.
  • the arm 3 forms, at its front end, in each of its sides 3a, 3b, a spout 11 in which is formed a notch 12 whose edges 13, 13a substantially form a triangle whose apex 14 defines an acute angle.
  • the upper edge 13 of the notch 12 is bevelled to delimit two blades, which is shown by fig. 4 and 6.
  • the notch 12 has a depth of the order of 5 cm.
  • the arm 3 carries, beyond the top 14 of the notch 12, an axis 15 for the articulation of blades 16 which, in the example shown, are three in number and which are kept suitably spaced from each other by spacer washers 17 carried by the axle 15 as well as by spacer washers 18 carried by an axle 19 which constitutes a second connecting element for the blades 16.
  • the thickness of the spacer washers 17 and 18 is chosen so that the blades 16 are equidistant from each other, as shown in FIG. 4, and so that the sides 3a, 3b forming the blades 13 can be inserted between the blades 16, which is also shown in FIG. 4.
  • the arm 4 defines, opposite the axis 19, ramps 20 in each of its two sides against which the axis 19 is supported since the spring 7 tends to pivot the arm 3 for which the axis 19 is applied against said ramps 20.
  • the upper edge of the blades 16 is thinned to form counterblades 16a arranged opposite the edges 13 forming the blades but offset as illustrated in FIG. 4.
  • the clamp is engaged in the pipe by its notch 12 while the arms 3, 4 are spaced apart as illustrated in FIG. 6.
  • the ramp 20 acts like a cam on the axis 19, so that the blades 16 pivot around the axis 15, their edges 16a being brought closer to the edge 13 on the sides 3a, 3b of the arm 3.
  • the clamp has three counterblades.
  • a simplified model could have only one counter blade which would be the middle counter blade 16 appearing in FIG. 4. In this case, a single ripple would only be formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

Crimping tool for tubes and the like, characterised by a first arm (3) having, in cross-section, the shape of a U and forming a nose (11) in which a notch (12) is made defining the edges (13, 13a) which form blades, the said first arm being articulated to a second arm (4) by means of a pin (5) disposed close to the end of the nose (11), the said second arm defining ramps (20) for actuating at least one blade (16) which is articulated to a pin (15) of the first arm, this pin being disposed beyond the notch (12). <IMAGE>

Description

La présente invention concerne une nouvelle pince à rétreindre destinée au façonnage de l'extrémité d'un tuyau devant être engagé à l'intérieur d'un autre tuyau initialement de même diamètre.The present invention relates to a new clamping pliers for shaping the end of a pipe to be engaged inside another pipe initially of the same diameter.

Le façonnage pour le rétreint d'une extrémité de tuyau est une opération devant être réalisée fréquemment sur site lors de l'assemblage des éléments de canalisations pour le transport et la distribution d'air ou d'autres gaz notamment dans des installations de climatisation.The shaping for the constriction of a pipe end is an operation which must be carried out frequently on site during the assembly of the pipe elements for the transport and distribution of air or other gases, in particular in air conditioning installations.

Pour que l'assemblage de deux tronçons de tuyau soit convenable, il est indispensable que le rétreint soit réalisé sur une longueur notable, par exemple de l'ordre de 5 cm.For the assembly of two sections of pipe to be suitable, it is essential that the constriction is carried out over a significant length, for example of the order of 5 cm.

La force à exercer pour rétreindre le métal en l'ondulant dépend de plusieurs facteurs, notamment de la dureté du métal, de son épaisseur et bien sûr de la longueur sur laquelle le rétreint doit être réalisé. Dans tous les cas, l'effort à appliquer est important.The force to be applied to shrink the metal by waving it depends on several factors, in particular the hardness of the metal, its thickness and of course the length over which the shrinkage must be carried out. In all cases, the effort to apply is important.

L'invention crée une pince à main qui permet de réaliser ce rétreint en exerçant sur des poignées une force proportionnellement faible par rapport à celle qui est appliquée par la pince, c'est-à-dire que celle-ci permet de travailler avec un rapport de bras de levier élevé, tout en rendant possible que le rétreint soit effectué sur une longueur notable.The invention creates a hand clamp which makes it possible to achieve this constriction by exerting on the handles a force proportionally low compared to that which is applied by the clamp, that is to say that it allows to work with a high leverage ratio, while making it possible for the necking to be carried out over a significant length.

Conformément à l'invention, la pince à rétreindre pour tuyaux et analogues est caractérisée par un premier bras présentant, en section, la forme d'un U et formant un bec dans lequel est réalisée une encoche délimitant des bords formant lames, ledit premier bras étant articulé à un second bras par un axe disposé près de l'extrémité du bec, ledit second bras délimitant des rampes pour actionner au moins une lame articulée sur un axe du premier bras, cet axe étant disposé au-delà de l'encocheAccording to the invention, the constriction pliers for pipes and the like is characterized by a first arm having, in section, the shape of a U and forming a spout in which a notch delimiting edges forming blades is produced, said first arm being articulated to a second arm by an axis disposed near the end of the spout, said second arm delimiting ramps for actuating at least one blade articulated on an axis of the first arm, this axis being disposed beyond the notch

Diverses autres caractéristiques de l'invention ressortent d'ailleurs de la description détaillée qui suit.Various other characteristics of the invention will also emerge from the detailed description which follows.

Une forme de réalisation de l'objet de l'invention est représentée, à titre d'exemple non limitatif, au dessin annexé.An embodiment of the object of the invention is shown, by way of nonlimiting example, in the accompanying drawing.

La fig. 1 est une perspective de deux tronçons de tuyau dont l'un est rétreint pour permettre son engagement dans l'autre.Fig. 1 is a perspective of two sections of pipe, one of which is constricted to allow its engagement in the other.

La fig. 2 est une élévation latérale de la pince à rétreindre selon l'invention.Fig. 2 is a side elevation of the necking pliers according to the invention.

La fig. 3 est une vue de dessus suivant la ligne III-III de la fig. 2.Fig. 3 is a top view along line III-III of FIG. 2.

La fig. 4 est une vue d'extrémité vue suivant la ligne IV-IV de la fig. 2.Fig. 4 is an end view seen along line IV-IV of FIG. 2.

La fig. 5 est une coupe vue suivant la ligne V-V de la fig. 3.Fig. 5 is a section seen along line V-V of FIG. 3.

La fig. 6 est une élévation analogue à la fig. 2 montrant la pince en position ouverte.Fig. 6 is an elevation similar to FIG. 2 showing the clamp in the open position.

La fig. 1 montre deux tronçons de tuyau 1 et 2 devant être engagés l'un dans l'autre. A l'origine, les deux tronçons sont de même diamètre et l'un d'eux, le tronçon 2, est rétreint à son extrémité 2a par formation d'ondulations réduisant son diamètre extérieur pour l'amener à coïncider avec le diamètre intérieur du tronçon 1.Fig. 1 shows two sections of pipe 1 and 2 to be engaged one inside the other. Originally, the two sections are of the same diameter and one of them, the section 2, is constricted at its end 2a by the formation of corrugations reducing its outside diameter to cause it to coincide with the inside diameter of the section 1.

Pour réaliser les ondulations de l'extrémité 2a, on met en oeuvre la pince illustrée par les fig. 2 à 6.To produce the undulations of the end 2a, the clamp illustrated in FIGS is used. 2 to 6.

La pince comporte deux bras 3, 4 constitués par des ferrures pliées en U de largeurs différentes de façon que l'un des bras puisse être engagé dans l'autre par emboîtement au moins à leur extrémité à laquelle lesdits deux bras sont articulés autour d'un axe 5.The clamp has two arms 3, 4 constituted by fittings bent in U of different widths so that one of the arms can be engaged in the other by interlocking at least at their end at which said two arms are articulated around an axis 5.

L'un des bras, celui désigné par 3 au dessin, est muni d'un axe 6 pour un ressort 7 du type en épingle qui tend à maintenir lesdits bras écartés l'un de l'autre comme illustré à la fig. 6 en les faisant pivoter autour de l'axe 5.One of the arms, that designated by 3 in the drawing, is provided with an axis 6 for a spring 7 of the pin type which tends to keep said arms separated from one another as illustrated in FIG. 6 by rotating them around axis 5.

Les bras 3, 4 forment ou sont munis de poignées 8, 9, de préférence en matière souple, et d'une agrafe 10 pour les réunir lorsque la pince est inutilisée comme représenté à la fig. 2.The arms 3, 4 form or are provided with handles 8, 9, preferably in flexible material, and with a clip 10 for joining them when the clamp is unused as shown in FIG. 2.

Le bras 3 forme, à son extrémité avant, dans chacun de ses côtés 3a, 3b, un bec 11 dans lequel est pratiquée une encoche 12 dont les bords 13, 13a forment sensiblement un triangle dont le sommet 14 délimite un angle aigu. Le bord supérieur 13 de l'encoche 12 est biseauté pour délimiter deux lames, ce qui est montré par les fig. 4 et 6. Dans la pratique, l'encoche 12 présente une profondeur de l'ordre de 5 cm.The arm 3 forms, at its front end, in each of its sides 3a, 3b, a spout 11 in which is formed a notch 12 whose edges 13, 13a substantially form a triangle whose apex 14 defines an acute angle. The upper edge 13 of the notch 12 is bevelled to delimit two blades, which is shown by fig. 4 and 6. In practice, the notch 12 has a depth of the order of 5 cm.

Le bras 3 porte, au-delà du sommet 14 de l'encoche 12, un axe 15 pour l'articulation de lames 16 qui, dans l'exemple représenté, sont au nombre de trois et qui sont maintenues convenablement écartées les unes des autres par des rondelles-entretoises 17 portées par l'axe 15 ainsi que par des rondelles-entretoises 18 portées par un axe 19 qui constitue un second élément de liaison pour les lames 16.The arm 3 carries, beyond the top 14 of the notch 12, an axis 15 for the articulation of blades 16 which, in the example shown, are three in number and which are kept suitably spaced from each other by spacer washers 17 carried by the axle 15 as well as by spacer washers 18 carried by an axle 19 which constitutes a second connecting element for the blades 16.

L'épaisseur des rondelles-entretoises 17 et 18 est choisie pour que les lames 16 soient équidistantes entre elles, ce que montre la fig. 4, et de façon que les côtés 3a, 3b formant les lames 13 puissent être intercalés entre les lames 16, ce que montre également la fig. 4.The thickness of the spacer washers 17 and 18 is chosen so that the blades 16 are equidistant from each other, as shown in FIG. 4, and so that the sides 3a, 3b forming the blades 13 can be inserted between the blades 16, which is also shown in FIG. 4.

Le bras 4 délimite, en regard de l'axe 19, des rampes 20 dans chacun de ses deux côtés contre lesquels l'axe 19 prend appui étant donné que le ressort 7 tend à faire pivoter le bras 3 pour lequel l'axe 19 est appliqué contre lesdites rampes 20.The arm 4 defines, opposite the axis 19, ramps 20 in each of its two sides against which the axis 19 is supported since the spring 7 tends to pivot the arm 3 for which the axis 19 is applied against said ramps 20.

Le bord supérieur des lames 16 est aminci pour former des contre-lames 16a disposées en regard des bords 13 formant lames mais décalées de la manière illustrée par la fig. 4.The upper edge of the blades 16 is thinned to form counterblades 16a arranged opposite the edges 13 forming the blades but offset as illustrated in FIG. 4.

Pour former les ondulations 2a à l'extrémité d'un tuyau, la pince est engagée dans le tuyau par son encoche 12 alors que les bras 3,4 sont écartés comme illustré à la fig. 6.To form the corrugations 2a at the end of a pipe, the clamp is engaged in the pipe by its notch 12 while the arms 3, 4 are spaced apart as illustrated in FIG. 6.

Lorsque le bord du tuyau vient dans le fond de l'encoche 12, les poignées 8, 9 sont rapprochées, ce qui fait pivoter les bras 3, 4 autour de l'axe 5 contre l'action du ressort 7.When the edge of the pipe comes into the bottom of the notch 12, the handles 8, 9 are brought together, which makes the arms 3, 4 pivot around the axis 5 against the action of the spring 7.

Pendant ce mouvement, la rampe 20 agit comme une came sur l'axe 19, de sorte que les lames 16 pivotent autour de l'axe 15, leurs bords 16a étant rapprochés du bord 13 des côtés 3a, 3b du bras 3.During this movement, the ramp 20 acts like a cam on the axis 19, so that the blades 16 pivot around the axis 15, their edges 16a being brought closer to the edge 13 on the sides 3a, 3b of the arm 3.

La distance séparant l'axe de pivotement 5 de l'axe 19 commandé par les rampes 20 étant faible par rapport à la longueur des bras 3, 4, il est possible de faire exercer par les lames et contre-lames décrites dans ce qui précède une force très importante qui déforme le tuyau pour former un jeu d'ondulations.The distance separating the pivot axis 5 from the axis 19 controlled by the ramps 20 being small compared to the length of the arms 3, 4, it is possible to have the blades and counterblades described in the above exercise a very large force which deforms the pipe to form a set of undulations.

Dans ce qui précède, la pince comporte trois contre-lames. Un modèle simplifié pourrait ne comporter qu'une seule contre-lame qui serait la contre-lame médiane 16 apparaissant à la fig. 4. Dans ce cas, une seule ondulation serait seulement formée.In the above, the clamp has three counterblades. A simplified model could have only one counter blade which would be the middle counter blade 16 appearing in FIG. 4. In this case, a single ripple would only be formed.

L'invention n'est pas limitée à l'exemple de réalisation, représenté et décrit en détail, car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the embodiment, shown and described in detail, because various modifications can be made without departing from its scope.

Claims (8)

1 - Pince à rétreindre pour tuyaux et analogues, caractérisée par un premier bras (3) présentant en section la forme d'un U et formant un bec (11) dans lequel est réalisée une encoche (12) délimitant des bords (13, 13a) formant lames, ledit premier bras étant articulé à un second bras (4) par un axe (5) disposé près de l'extrémité du bec (11), ledit second bras délimitant des rampes (20) pour actionner au moins une lame (16) articulée sur un axe (15) du premier bras, cet axe étant disposé au-delà de l'encoche (12). 1 - Nipping pliers for pipes and the like, characterized by a first arm (3) having a U-shaped cross-section and forming a spout (11) in which a notch (12) is produced delimiting edges (13, 13a ) forming blades, said first arm being articulated to a second arm (4) by an axis (5) disposed near the end of the spout (11), said second arm defining ramps (20) for actuating at least one blade ( 16) articulated on an axis (15) of the first arm, this axis being disposed beyond the notch (12). 2 - Pince suivant la revendication 1, caractérisée en ce que le second bras présente, en section, la forme d'un U pour emboîter le second bras dans sa partie formant le bec (11). 2 - Pliers according to claim 1, characterized in that the second arm has, in section, the shape of a U to fit the second arm in its part forming the spout (11). 3 - Pince suivant l'une des revendications 1 et 2, caractérisée en ce que le premier bras comporte un axe (6) pour un ressort en épingle (7) tendu pour écarter les deux bras l'un de l'autre. 3 - Clamp according to one of claims 1 and 2, characterized in that the first arm has an axis (6) for a hairpin spring (7) stretched to separate the two arms from one another. 4 - Pince suivant l'une des revendications 1 à 3, caractérisée en ce que l'axe (15) disposé au-delà de l'encoche (12) supporte trois lames (16) maintenues écartées par des rondelles-entretoises (15) de manière que lesdites trois lames soient décalées par rapport aux bords (13) formant lames du premier bras. 4 - Pliers according to one of claims 1 to 3, characterized in that the axis (15) disposed beyond the notch (12) supports three blades (16) kept apart by washer-spacers (15) so that said three blades are offset from the edges (13) forming blades of the first arm. 5 - Pince suivant l'une des revendications 1 à 4, caractérisée en ce qu'un axe (19) prenant appui contre les rampes (20) du second bras réunit les trois lames (16) et supporte des rondelles-entretoises (18) entre ces lames. 5 - Pliers according to one of claims 1 to 4, characterized in that an axis (19) bearing against the ramps (20) of the second arm joins the three blades (16) and supports spacers washers (18) between these blades. 6 - Pince suivant l'une des revendications 1 à 5, caractérisée en ce que les bras (3, 4) sont prolongés par des poignées (8, 9). 6 - Pliers according to one of claims 1 to 5, characterized in that the arms (3, 4) are extended by handles (8, 9). 7 - Pince suivant l'une des revendications 1 à 6, caractérisée en ce que les rampes (20) d'actionnement de l'axe (19) sont disposées à proximité de l'axe d'articulation (5) des deux bras. 7 - Pliers according to one of claims 1 to 6, characterized in that the ramps (20) for actuating the axis (19) are arranged near the axis of articulation (5) of the two arms. 8 - Pince à rétreindre pour tuyaux et analogues sensiblement telle que décrite et représentée aux dessins annexés. 8 - Shrinking pliers for pipes and the like substantially as described and shown in the accompanying drawings.
EP92400784A 1991-03-28 1992-03-23 Crimping pliers for tubes and the like Expired - Lifetime EP0508850B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9103767A FR2674461B1 (en) 1991-03-28 1991-03-28 TIGHTENING PLIERS FOR PIPES AND THE LIKE.
FR9103767 1991-03-28

Publications (2)

Publication Number Publication Date
EP0508850A1 true EP0508850A1 (en) 1992-10-14
EP0508850B1 EP0508850B1 (en) 1994-09-28

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EP92400784A Expired - Lifetime EP0508850B1 (en) 1991-03-28 1992-03-23 Crimping pliers for tubes and the like

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US (1) US5263355A (en)
EP (1) EP0508850B1 (en)
AT (1) ATE112193T1 (en)
DE (2) DE9105353U1 (en)
ES (1) ES2060456T3 (en)
FR (1) FR2674461B1 (en)

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US6164107A (en) * 1996-12-12 2000-12-26 Korba, Jr.; William Radius crimping tool
US5768935A (en) * 1997-03-13 1998-06-23 Owens; Carl H. Blade crimping device
US8333729B2 (en) * 2009-04-07 2012-12-18 Polybiotics Llc Multi-dose delivery system
US8495902B2 (en) * 2010-11-30 2013-07-30 Mwi Veterinary Supply Co. Crimping device
CN104139120A (en) * 2014-07-01 2014-11-12 广东志高空调有限公司 Sealing method for punching injection process pipe of air conditioner with flammable refrigerant
US11794232B1 (en) 2017-05-11 2023-10-24 Simpson Strong-Tie Company Inc. Tool for curving structural framing components

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CH370903A (en) * 1959-06-26 1963-07-31 Schoop Traugott Process for the production of roof drainage pipes from folded cylindrical sheet metal pipe, roof drainage pipe produced according to this and a pull-in device for carrying out the process
AU3304171A (en) * 1971-09-02 1973-03-08 Herbert Conn Rex Hand crimper
DE2602491A1 (en) * 1975-03-25 1976-10-14 Pressmaster Ag ARRANGEMENT WITH VARIABLE FORCE TRANSMISSION RATIO, ESPECIALLY WITH A PLIERS OR SCISSORS-LIKE TOOL

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Publication number Publication date
EP0508850B1 (en) 1994-09-28
DE69200456D1 (en) 1994-11-03
DE9105353U1 (en) 1991-06-20
DE69200456T2 (en) 1995-01-26
FR2674461B1 (en) 1993-06-11
US5263355A (en) 1993-11-23
ES2060456T3 (en) 1994-11-16
FR2674461A1 (en) 1992-10-02
ATE112193T1 (en) 1994-10-15

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