EP0380452B1 - Verfahren und Vorrichtung zur Herstellung von Schmuckketten mit spiralförmigen Gliedern - Google Patents

Verfahren und Vorrichtung zur Herstellung von Schmuckketten mit spiralförmigen Gliedern Download PDF

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Publication number
EP0380452B1
EP0380452B1 EP90830009A EP90830009A EP0380452B1 EP 0380452 B1 EP0380452 B1 EP 0380452B1 EP 90830009 A EP90830009 A EP 90830009A EP 90830009 A EP90830009 A EP 90830009A EP 0380452 B1 EP0380452 B1 EP 0380452B1
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EP
European Patent Office
Prior art keywords
link
mesh
free
links
machine
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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.)
Expired - Lifetime
Application number
EP90830009A
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English (en)
French (fr)
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EP0380452A3 (de
EP0380452A2 (de
Inventor
Pierino Maruffi
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Icm Italiana Costruzioni Metalmeccaniche Srl
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Icm Italiana Costruzioni Metalmeccaniche Srl
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21L—MAKING METAL CHAINS
    • B21L11/00—Making chains or chain links of special shape
    • B21L11/005—Making ornamental chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21L—MAKING METAL CHAINS
    • B21L7/00—Making chains or chain links by cutting single loops or loop-parts from coils, assembling the cut parts and subsequently subjecting same to twisting with or without welding

Definitions

  • the invention relates to a method for forming chains with cylindrical helical meshes, for necklaces, bracelets, belts and the like, and a machine for its implementation.
  • these chains consist of cylindrical helical meshes of length slightly less than two turns and with a pitch equal to twice the thickness of the wire with which they are made.
  • these meshes are assembled by hand, that is to say united together in pairs, by helical rotation of a free mesh with respect to a mesh already assembled by alternately making a free mesh and a fixed mesh, that is to say a set called "Garibaldi module”.
  • An ornamental chain to which the invention relates is formed by several "Garibaldi modules”. It is obvious that the manual production of these chains requires a great deal of time and great skill and precision on the part of the operator; consequently, production is limited and the cost very high to the point that it is limited to chains of precious metal such as gold or silver.
  • Document DE-A-3334449 discloses a device for manufacturing an ornamental chain of meshes, each pivoted by 90 ° and thus united with one another, which comprises: means for forming meshes helical with a device for winding the supply wire, gripper means for retaining each mesh and for setting it in motion and means for cutting the mesh forming wire.
  • Each of the helical meshes, which is formed progressively, is pivoted by 90 °, then united with the previous mesh and finally cut.
  • the object of the present invention is to eliminate the aforementioned drawbacks by proposing a method and a machine for the automatic formation of these chains with helical meshes so as to increase the precision, the speed and the reliability of the production and therefore to reduce drastically manufacturing costs.
  • FIG. 1 shows an enlarged view of a helical link for an ornamental chain with "Garibaldi modules”
  • FIG. 2 shows the view of a free mesh with two meshes of FIG. 1
  • FIG. 3 represents the view of a fixed mesh with two stitches in FIG. 1
  • FIG. 4 represents the view of a piece of chain with "Garibaldi modules”
  • FIG. 5 shows the plan view of a machine for forming chains according to the invention, associated with a helical mesh forming machine;
  • FIG. 1 shows an enlarged view of a helical link for an ornamental chain with "Garibaldi modules”
  • FIG. 2 shows the view of a free mesh with two meshes of FIG. 1
  • FIG. 3 represents the view of a fixed mesh with two stitches in FIG. 1
  • FIG. 4 represents the view of a piece of chain with "Garibaldi modules”
  • FIG. 5 shows the plan view of a machine for forming chains according to the invention, associated with a helical mesh forming machine
  • FIG. 6 shows the sectional view along line BB of FIG. 5;
  • FIG. 7 shows the sectional view along the line CC of FIG. 6;
  • FIG. 8 shows the front view of a detail of the means for advancing the clamp holder shaft for the free meshes;
  • FIG. 9 shows the front view of the mesh forming machine indicated in FIG. 5;
  • FIG. 10 shows the schematic plan view of the machine of FIG. 5, in the phase of setting the first stitch for a "Garibaldi module", from a stitch forming machine;
  • FIG. 11 shows the machine of FIG. 5 in the free mesh position of the first mesh of the module with the mesh of the chain in formation which was meshed last;
  • FIG. 12 shows the machine of FIG. 5, in the setting phase of the second mesh for the module, coming from the mesh forming machine;
  • FIG. 13 shows the machine of FIG. 5 in the fixed mesh position of the second mesh of the module with the first mesh of the module.
  • Fig. 1 a helical link 1 from which a chain with "Garibaldi modules" is formed; this mesh is made, with known means, from a wire metallic, of predetermined nature and diameter, bent in a helix with a pitch barely more than twice the diameter of the wire and cut so as to obtain meshes of length slightly less than two turns, that is to say approximately 700 ° between the two ends 1a and 1b which are always directed downwards.
  • said clamp 35 has its jaws provided with an imprint adapted to receive a helical mesh of shape and dimensions corresponding to those of mesh 1.
  • the axis of said jaws is parallel to that of the shaft 29 and distant from the latter by a value equal to the radius of the mesh to allow helical movement during meshing.
  • the automatic opening of the jaws of the clamp 35 is obtained by means of a spring, at the moment when a rod 36 with wedge-shaped head releases the clamp.
  • a second section (B) for blocking the penultimate link of the chain being formed with a sleeve support 41 fixed on a base plate and in which is housed a vertical hollow shaft 42 motorized and whose upper end is shaped like a horizontal slide 43 for a slide 44 for supporting two articulated clamps 45 and 46, juxtaposed in the sliding direction, and alternately positionable in the locking and unlocking position of the corresponding mesh, that is to say on the vertical axis 22 of rotation of the slide 44 and of the shaft 42 in the cavity of which the chain descends during formation; with a hollow rod 47, threaded into the shaft 42, provided with a wedge-shaped head 48 to act on the arm of the clamps 45 and 46, and, moreover, sliding vertically under the action of an actuator E between an upper position for opening the jaws and a lower position for closing the jaws.
  • a sleeve support 41 fixed on a base plate and in which is housed a vertical hollow shaft 42 motorized and whose upper end is shaped like a horizontal
  • the jaws of said clamps 45 and 46 are provided with imprints suitable for blocking a mesh which is with its ends oriented respectively downwards or upwards. that is to say in the positions suitable for the two types of mesh; with two actuators 49 and 50 to move the support 44 and bring the vice 45 or 46 respectively in the locked position; with a clamp 51 located above the two vices 45 and 46, sliding vertically and adapted to bring the turns of the meshes against each other closer together and with a contrast tip 52 sliding horizontally in a support 53 and intended to penetrate between the end 1a and the central turn of the first mesh 1 'which has been meshed, in order to guarantee its locked position during the formation of the fixed mesh with the second mesh 1''of the module.
  • a machine S for helical mesh formation 1 associated with the machine for the formation of chains is similar to a machine for the production of spiral springs, and essentially comprises several motorized rollers 54 for the horizontal advancement of the metal wire 55 supplied by a coil (not shown) and of the predetermined diameter; two contrast tips 56 and 57, arranged in a vertical plane, at 45 ° to the direction of advancement of the wire, respectively above and below the latter, and with the concave end with circular profile to allow the bending of the wire in circles to the desired diameter; another tip 58 situated above and offset laterally with respect to said tips 56 and 57 to generate, with the wire bent in a circle, a helix of predetermined pitch, but generally equal to twice the diameter of the wire used; and finally a shear 59 for cutting each mesh in a helix with an angular development slightly less than two turns, for example of about 700 °.
  • the operation of a machine for the formation of ornamental chains with "Garibaldi modules” is as follows.
  • the clamp 35 of the section A for moving the free meshes is turned towards the machine S for forming the meshes and in the advanced position towards the outside under the effect of the thrust of the actuator 19 on the support 16;
  • the shaft 42 of the section B for blocking the assembled meshes is in the lowered position, the axis of the support 44 is oriented along the arrow F1 and in axis with the actuator 50 and the vice 45 is in the active gripping position, that is to say in the blocking position of the lower mesh of a "Garibaldi module" held in the vertical position and the upper mesh of which is in the mesh position.
  • the clamp 35 is then closed on the free end of the wire spiral 56 at the outlet of the machine S and a mesh 1 'of length slightly less than two turns is cut by the shears 59; after which the support 16 moves back and rotates 90 ° clockwise and simultaneously the actuator 20 brings the support 16 back to the advanced position, positioning the free end of the free mesh 1 ′ held by the clamp near the mesh 1 '' correspondent waiting for the mesh (see Fig. 11).
  • the support 22 then pivots upwards on the sector 23 by tilting the clamp-holder shaft 29 by about 20 ° in a vertical plane and the center of which is in correspondence with the end 1b of the free mesh 1 'to be mesh; then the clamp holder shaft 29 rotates about one and a half turns and advances about one and a half steps from the helix of the mesh, obtaining a free mesh of the two meshes concerned.
  • the rod 47 rises by opening the vice 45 and the actuator 49 advances the support 44 carrying the second clamp 46 in the gripping position; then the motor shaft 42 pivots clockwise until the axis of the support 44 is in the direction of the arrow F2, after which the shaft 42 and the support 44 are lifted to bring the vice 46 in correspondence with the 1 '' link of the chain located above.
  • the clamp 35 is then opened and returned to the rear inactive position and the shaft 12, by pivoting 90 ° counterclockwise, brings, in cooperation with the actuator 19, the clamp 35 open in correspondence with the machine S for forming a new 1 '' mesh to mesh (see Fig. 12).
  • the support 44 is lowered and the motor shaft 42 rotates clockwise until the axis of the support 44 is in the direction of the arrow F3; for its part, the clamp holder shaft 29 rotates clockwise by 90 ° and the support 16 advances to bring the end 1b of the new mesh 1 '' into the mesh position (see Fig. 13).
  • the shaft 29 is then tilted again by about 20 °; after which the clamp holder shaft 29 rotates and advances so as to embed the free ends of the mesh held by the clamp 35 between the corresponding end and the central turn of the mesh 1 'maintained and thus achieving a fixed mesh.
  • the vice 46 is opened and the motor shaft 42 rotates anti-clockwise to align the axis of the support 44 with that of the actuator 50 and allow the latter to return the clamp 45 to the position of taken.
  • the clamp holder shaft 29 then returns to the horizontal position; the motor shaft 42 is raised to allow the vice 45 to block the chain link above and the clamp 35 opens by abandoning the mesh; then it moves back to the rest position.
  • the shaft 12 rotates 90 ° counterclockwise and the actuator 19 returns the clamp 35 to the position of taking a new link; meanwhile, the motor shaft 42 is lowered to allow the start of a new training cycle for a "Garibaldi module".
  • this machine is easily adaptable to any type of helical mesh through the simple replacement of the clamps 45 and 46 and of the front cam 30 and some adjustments on the means of displacement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Jigs For Machine Tools (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Adornments (AREA)

Claims (7)

  1. Verfahren zur Herstellung von Schmuckketten mit Kettengliedern in Form von zylindrischen Wendeln, das folgende Schritte umfaßt:
    Festlegen des unteren Kettengliedes (1') eines zuvor gebildeten und in senkrechter Stellung angeordneten "Garibaldi-Moduls" (1, 1''),
    Ergreifen eines ersten Kettengliedes (1') mit horizontaler Längsachse und nach unten gerichteten freien Enden (1a, 1b) am Ausgang einer Maschine (S) zur Herstellung der Kettenglieder in Form von zylindrischen Wendeln; Positionieren des ersten Kettengliedes (1') mit seiner Längsachse im wesentlichen senkrecht zur Längsachse des oberen Kettengliedes (1'') des "Garibaldi-Moduls" (1', 1'') und mit seinem freien Ende (1b) in einer Verkettungsstellung mit der mittleren Schraubenwindung des oberen Kettengliedes (1''),
    dadurch gekennzeichnet, daß das Verfahren der Reihe nach die folgenden Phasen umfaßt:
    - Drehen des ersten Kettengliedes (1') im Sinn seiner Wendel ungefähr um 1 1/2 Drehungen und gleichzeitiges Vorwärtsbewegen des Kettengliedes um ungefähr 1 1/2 Teilungsschritte der Wendel um eine freie Verkettung mit dem Kettenglied (1'') des "Garibaldi-Moduls" zu erzielen;
    - Freigeben des unteren Kettengliedes (1') des "Garibaldi-Moduls" und Festlegen seines oberen Kettengliedes (1'');
    - Freigeben des ersten Kettengliedes (1'), das in freier Weise verkettet wurde,
    - Ergreifen eines zweiten freien Kettengliedes (1'') am Ausgang der Maschine (S) zur Herstellung der Kettenglieder;
    - Positionieren des zweiten Kettengliedes (1'') mit seiner Längsachse im wesentlichen senkrecht zur Längsachse des zuvor verketteten Kettengliedes (1') und mit seinem freien Ende (1b) in einer Verkettungsstellung mit der mittleren Schraubenwindung des Kettengliedes (1');
    - Drehen des zweiten Kettengliedes (1'') im Sinn seiner Wendel ungefähr um eine Drehung und gleichzeitiges Vorwärtsbewegen um einen Teilungsschritt der Wendel um die Realisierung einer festen Verkettung zu ermöglichen;
    - Freigeben des oberen Kettengliedes (1'') des zuvor gebildeten "Garibaldi-Moduls" und Festlegen des Kettengliedes (1'), das zuerst verkettet wurde,
    - Freigeben des Kettengliedes (1''), das als zweites verkettet wurde.
  2. Maschine zur Herstellung von Schmuckketten mit Kettengliedern in Form von zylindrischen Wendeln nach dem Verfahren aus Anspruch 1, die Einrichtungen zum Halten und Bewegen der Kettenglieder aufweist, dadurch gekennzeichnet, daß diese Einrichtungen folgende Bestandteile umfassen:
    - Einen ersten Abschnitt (A) für die Bewegungen eines jeden freien Kettengliedes (1', 1'') bis zu seiner Verkettung mit dem entsprechenden Kettenglied der Kette im Verlauf von deren Herstellung, das zuletzt verkettet worden ist, mit einer vertikalen Motorwelle (12), die eine horizontale Gleitbahn (15) für einen Schlitten (16) unterstützt, der eine Klemmhaltergruppe (17) trägt und horizontal zwischen einer inaktiven, zurückgezogenen Stellung und zwei vorgeschobenen Stellungen zum Übernehmen eines freien Kettengliedes von einer Maschine (S) zur Herstellung von Kettengliedern bzw. zum Positionieren dieses freien Kettengliedes in einer Verkettungsstellung verschiebbar ist, mit einer Klemme (35) zum Ergreifen des freien Kettengliedes (1', 1''), die für eine der Längsachse folgende schraubenartige Vorwärtsbewegung steuerbar ist, um die Verkettung mit dem letzten Kettenglied der in Herstellung befindlichen Kette zu bewerkstelligen,
    - einen zweiten Abschnitt (B) zum Festlegen des vorletzten Kettengliedes der in Herstellung befindlichen Kette mit einer vertikalen, motorgetriebenen Welle (42), die in axialer Richtung gleitet und eine horizontale Gleitbahn (43) für einen Schlitten (44) trägt, der mit zwei getrennten Klemmvorrichtungen (45, 46) versehen und so bewegbar ist, daß die beiden Klemmvorrichtungen getrennt in eine Position zum Ergreifen eines entsprechenden Kettengliedes der in Herstellung befindlichen Kette gebracht werden können.
  3. Maschine nach Anspruch 2, dadurch gekennzeichnet, daß sie zum Verschieben des Schlittens (16) des Abschnittes (A) zwei Schiebevorrichtungen (19, 20) umfaßt, die auf den Rand des Schlittens (16) einwirken und von denen die eine (19) zum Positionieren der Klemme (35) in der vorgeschobenen, zum Ergreifen der Kettenglieder (1', 1'') am Ausgang der Maschine (S) zur Herstellung der Kettenglieder vorgesehenen Stellung und die andere (20) zum Positionieren der Klemme (35) in der vorgeschobenen Verkettungsstellung dient, wobei Rückholvorrichtungen vorgesehen sind, um den Schlitten (16) in seine Ruhelage zurückzuholen.
  4. Maschine nach Anspruch 2, dadurch gekennzeichnet, daß die Klemmenhaltergruppe (17) des Abschnittes (A) einen Träger (22) umfaßt, der verschieblich auf einem senkrechten Kreisbogenstück (23) montiert ist, dessen Mittelpunkt mit dem vorderen Ende (16) des in der Verkettungsphase befindlichen Kettengliedes übereinstimmt, sowie eine horizontale Welle (29), die am Kopf die Klemme (35) trägt und deren Drehbewegung mit Hilfe eines Motors (25) vermittels eines Getriebezuges (26-28) mit einem Übersetzungsverhältnis 2:1 erhalten wird, während ihre Vorwärtsbewegung mit einer Schrittweite, die gleich der der Wendel der Kettenglieder ist, ausgehend von derselben Motorwelle (25) vermittels eines frontalen Nockens (30), der vor der Motorwelle (25) montiert ist, und eines Hebels (31) erhalten wird, der auf den hinteren Bereich der Klemmenhalter-Welle (29) unter Zwischenfügung eines Stößels (32) einwirkt.
  5. Maschine nach Anspruch 2, dadurch gekennzeichnet, daß die Backen der Klemmvorrichtungen (45, 46) mit Vertiefungen versehen sind, die es ermöglichen, ein wendelförmiges Kettenglied so festzuhalten, daß seine freien Enden (1a, 1b) nach unten bzw. nach oben gerichtet sind.
  6. Maschine nach Anspruch 2, dadurch gekennzeichnet, daß sie zur Betätigung der Klemmvorrichtungen (45, 46) eine Stange (48) mit einem keilförmigen Kopf (47) umfaßt, die vertikal zwischen einer unteren und einer oberen Position hin- und hergleitet, um die Backen zu öffnen bzw. zu schließen.
  7. Maschine nach Anspruch 2, dadurch gekennzeichnet, daß sie zur abwechselnden Positionierung der Klemmvorrichtungen (45, 46) in der aktiven Stellung zum Ergreifen des entsprechenden Kettengliedes des "Garibaldi-Moduls" zwei Schiebevorrichtungen (50, 51) umfaßt, die auf den Schlitten (44) in zwei entsprechenden Richtungen der Verschiebeachse des Schlittens (44) einwirken.
EP90830009A 1989-01-24 1990-01-11 Verfahren und Vorrichtung zur Herstellung von Schmuckketten mit spiralförmigen Gliedern Expired - Lifetime EP0380452B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT932189 1989-01-24
IT8909321A IT1233139B (it) 1989-01-24 1989-01-24 Metodo e macchina per la formazione di catene ornamentali con maglie ad elica cilindrica

Publications (3)

Publication Number Publication Date
EP0380452A2 EP0380452A2 (de) 1990-08-01
EP0380452A3 EP0380452A3 (de) 1991-06-05
EP0380452B1 true EP0380452B1 (de) 1993-12-15

Family

ID=11128416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90830009A Expired - Lifetime EP0380452B1 (de) 1989-01-24 1990-01-11 Verfahren und Vorrichtung zur Herstellung von Schmuckketten mit spiralförmigen Gliedern

Country Status (5)

Country Link
US (1) US5092120A (de)
EP (1) EP0380452B1 (de)
DE (1) DE69005134T2 (de)
ES (1) ES2049455T3 (de)
IT (1) IT1233139B (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE329030C (de) * 1918-11-07 1920-11-13 Karl Bosch Jr Verfahren und Vorrichtung zur maschinellen Herstellung von Franzosenketten
US2617250A (en) * 1949-09-24 1952-11-11 Kunzmann Chain Co Double-link chain machine
GB1547584A (en) * 1976-05-28 1979-06-20 Janne J Machine for forming a decorative chain
DE3334449A1 (de) * 1983-09-23 1985-04-11 Fico Fischer & Co Maschinenbau GmbH, 7537 Remchingen Verfahren und vorrichtung zum herstellen einer schmuck-gliederkette
IT1207830B (it) * 1987-02-06 1989-06-01 C M S S R L Costruzione Macchi Apparecchiatura per la produzionedi catene ornamentali del tipo detto occhio di pavone.

Also Published As

Publication number Publication date
IT1233139B (it) 1992-03-14
ES2049455T3 (es) 1994-04-16
IT8909321A0 (it) 1989-01-24
EP0380452A3 (de) 1991-06-05
DE69005134D1 (de) 1994-01-27
DE69005134T2 (de) 1994-05-19
US5092120A (en) 1992-03-03
EP0380452A2 (de) 1990-08-01

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