EP0305307B1 - Automatic wiring machine conveyors fitted with pliers for retaining one or several conductors - Google Patents

Automatic wiring machine conveyors fitted with pliers for retaining one or several conductors Download PDF

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Publication number
EP0305307B1
EP0305307B1 EP88430017A EP88430017A EP0305307B1 EP 0305307 B1 EP0305307 B1 EP 0305307B1 EP 88430017 A EP88430017 A EP 88430017A EP 88430017 A EP88430017 A EP 88430017A EP 0305307 B1 EP0305307 B1 EP 0305307B1
Authority
EP
European Patent Office
Prior art keywords
clamp
wires
piston
jaws
notch
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.)
Expired - Lifetime
Application number
EP88430017A
Other languages
German (de)
French (fr)
Other versions
EP0305307A1 (en
Inventor
Victor Ripert
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.)
L'ENTREPRISE INDUSTRIELLE
Original Assignee
L'ENTREPRISE INDUSTRIELLE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to FR8711392A priority Critical patent/FR2619038B1/fr
Priority to FR8711392 priority
Application filed by L'ENTREPRISE INDUSTRIELLE filed Critical L'ENTREPRISE INDUSTRIELLE
Publication of EP0305307A1 publication Critical patent/EP0305307A1/en
Application granted granted Critical
Publication of EP0305307B1 publication Critical patent/EP0305307B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/28Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S269/00Work holders
    • Y10S269/902Work holder member with v-shaped notch or groove
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S269/00Work holders
    • Y10S269/903Work holder for electrical circuit assemblages or wiring systems

Description

  • The present invention relates to clamps fitted to conveyors which are part of automatic wiring machines.
  • The technical sector of the invention is that of the construction of automatic wiring machines.
  • Automatic wiring machines are known which are equipped with a microprocessor and which automatically cut sections of wires each having a determined length, which strip the ends of these wires and which crimp connecting pieces thereon. These machines comprise one or more circular or linear conveyors which carry means for holding the sections of wires, which are presented at various work stations, distributed along the conveyor.
  • FR-A-2 130 212 discloses a conveyor system comprising clamps formed by two complementary jaws symmetrical with respect to a plane of symmetry, said jaws being pivotally connected to one another and also being urged towards a position closed by springs.
  • It is necessary for certain applications to produce cabling machines capable of making multi-crimps, that is to say crimping the same connection piece on several conductive wires at the same time, the problem to be solved is to produce pliers capable of enclosing one or more threads and of receiving new threads without risking letting go of those they hold. In addition, mechanical means must also be made which make it possible to introduce the wires into the clamps and to extract them easily.
  • This problem is solved by means of clamps according to Claim 1, characterized in that each clamp comprises two pairs of spouts articulated on a fixed base, which pairs each comprise two spouts which are symmetrical with respect to a plane of symmetry and which are equipped with automatic return means in the closed position and are separated by an intermediate space and, each clamp comprises, in addition, a central piston which is located in said intermediate space, which is symmetrical with respect to said plane of symmetry and which is equipped with means automatic return to the free end of said nozzles.
  • Advantageously, the upper face of said central piston has a V-shaped notch symmetrical with respect to said median plane and flared outwards.
  • The free end of the inner edge of each nozzle has a ramp inclined inward downward. In addition, the internal edge of each of the spouts comprises, below the lower end of said ramp, a concave notch which delimits with the flared notch on the external face of the piston a passage of variable section, in which one or several wires can be clamped.
  • The invention also relates to devices for introducing wires into a clamp according to the invention, which comprise two pairs of jaws which are actuated by a jack and whose spacing is greater than the width of a clamp.
  • The invention results in new grippers intended to equip conveyors forming part of an automatic wiring machine, which grippers are intended to hold one or more conductive wires to present the ends thereof to distributed work stations. along the conveyors.
  • An advantage of the clamps according to the invention lies in the fact that they can receive one or more conductive wires and that the introduction of a new wire takes place without the clamp loosening the other wires.
  • Another advantage of the clamps according to the invention lies in the fact that, whatever the number of conductive wires which they enclose, they keep them well grouped in the form of bundles which can have a generally circular or flattened cross section. , so that it is possible to crimp a connection piece on several wires at the same time.
  • Another advantage of the pliers according to the invention lies in the fact that they facilitate the mechanical introduction of the wires into the pliers which can be carried out simply by presenting the wire above the pliers and pressing downwards, so that the wire itself causes the mouths of the pliers to open.
  • Another advantage of the pliers according to the invention lies in the fact that they make it possible to obtain the ejection of the wires from the pliers, in a simple manner, by pressing only on the beaks of the pliers to open them, which causes ejection by the piston which is part of each clamp.
  • The following description refers to the appended drawings which represent, without any limiting character, an exemplary embodiment of pliers according to the invention.
  • Figure 1 is a schematic overview of a conveyor part of an automatic wiring machine.
  • Figure 2 is a cross section along II-II of Figure 1.
  • Figure 3 is a section along III-III of Figure 1 showing several successive clamps in different positions.
  • Figure 4 is a section on IV-IV of Figure 3.
  • Figure 5 is an elevational view of a device for introducing the son into the clamps according to the invention.
  • Figure 6 is a section of the device of Figure 5 in the open position.
  • Figures 7 and 8 are partial views of two alternative embodiments of pliers according to the invention.
  • Figure 1 shows a conveyor 1 which is for example an endless belt, toothed, driven by a stepping motor. This conveyor is used to move sections of conductive wires 3 in front of various work stations 4₁, 4₂ ..... 4n, located along the conveyor 1, on one side of it.
  • These workstations may include, for example, a station which strips the ends of the conductive wires, another station which threads on the bared ends a heat-shrinkable insulating sleeve, another station which crimps a connection piece on the bared ends, another station which brings the insulating sleeve back onto the connection piece, etc.
  • The movements of the conveyors and the work stations are controlled synchronously by a central unit 5, equipped with a microprocessor.
  • Automatic wiring machines are already known which are fitted with linear conveyors or a turntable which carry vices which each enclose a wire.
  • These machines are capable of automatically preparing batches of determined wires, each section of which has a determined length and is equipped with a determined connection piece.
  • However, existing machines are not designed to allow multiple crimping to be performed mechanically, that is to say to crimp the same connection clamp on several conductive wires.
  • A conveyor according to the invention is equipped with clamps 6, which are moved by the conveyor and which can each grip either a single wire such as for example the clamps 6₁, 6₂, 6₃, 6₆, 6₇, or several wires like the clamps 6inces, 6₅.
  • Figure 2 is a cross section along II-II of Figure 1.
  • We see in Figure 2 the upper strand 1 of an endless conveyor which is a toothed belt. This conveyor is placed at the bottom of a slide formed by two sections 7a and 7b located on either side of the conveyor and parallel to it. Supports 8 are engaged in the slide. The underside of these supports has ribs 8a which delimit grooves, in which the notches 1a of the toothed belt 1 are engaged, so that the supports 8 are driven without sliding by the movement of the toothed belt and they slide in the slide 7a, 7b which guides them.
  • Each support 8 comprises a hollow pillar 8b which may have a round or polygonal section in which a spring 9 is placed and on which a cap 10 is engaged, which is pushed upwards by the spring 9.
  • FIG. 4 represents an example in which the pillar 8b has a circular section and a pin 11 is engaged in an ovalized hole 12 in the pillar to prevent rotation of the cap while allowing vertical movement.
  • Each cap 10 carries a clamp 15. Each clamp has a fixed base 13, which is fixed to one of the caps 10 by two screws 14 or by any other equivalent fixing means. Each clamp is symmetrical with respect to a plane PP ′ which is perpendicular to the plane of Figure 3 and which is perpendicular to the longitudinal axis of the conveyor.
  • Each clamp has two pairs of spouts forming two elementary clamps. Each elementary clamp is composed of two nozzles 15a, 15b having shapes symmetrical with respect to the plane PP '.
  • Each of the spouts is articulated to the base 13 by an articulation 16a or 16b. Each spout is equipped with a return spring 17a, 17b or any other equivalent return means which exerts on said spout a torque tending to rotate it around its articulation 16a or 16b in the direction of closing the clamp.
  • We see in Figure 2 the two elementary clamps separated by an intermediate space 19. We also see in Figures 2 and 3 that the two spouts 15a, 15b of each pair have the same thickness and are located in the same longitudinal plane at l except the outer ends 18a and 18b which have a thickness equal to half the thickness of the spouts and which are offset laterally, so that they intersect when the two spouts are in the closed position.
  • Each clamp further comprises a central piston 20 which is located in the space 19 intermediate between the two elementary clamps.
  • The piston 20 is symmetrical with respect to the plane PP '. It is mounted on a rod 21 which has a head 21a, which slides in a slot 22 of the base 13 and which abuts against the upper end of said slot. The piston 20 is equipped with a return spring 23 or any other return means which tends to push the piston towards the free end of the jaws of the pliers, that is to say in the high position in the case of Figure 3.
  • The upper face of the piston 20 has a notch 24 in the shape of a V symmetrical relative to the plane PP '.
  • The internal edge of the free end of each spout has a ramp 25a, 25b which is inclined downwards towards the inside, that is to say towards the plane of symmetry PP '. The ramps 25a and 25b of the two nozzles of each pair are symmetrical with respect to the plane PP 'and therefore form a Vee diverging towards the outside like the notch 24 on the external face of the piston.
  • The internal edge of each of the spouts further comprises, immediately below the lower or internal end of the inclined ramp 25a, 25b, a notch 26a, 26b, the concavity of which is directed inwards.
  • Each of the spouts has a lug 27a, 27b in relief towards the outside, which is arranged so that by pressing simultaneously on the four lugs, a torque is exerted on the spouts which tends to spread them apart, which has the effect to cause the opening of the two elementary clamps and the ejection of the wires by the central piston 20 which is pushed upwards.
  • Figure 3 shows three different positions of a pliers according to the invention.
  • The leftmost view shows pliers in the fully closed position holding no wires. The free ends 18a and 18b of the two nozzles of each elementary clamp intersect. The piston 20 is blocked by the two nozzles because the return springs of these exert a closing torque greater than the opening torque due to the return spring 23 of the piston.
  • The right view represents a section through a longitudinal plane of a clamp in position where it encloses several wires 28.
  • It is clearly seen in this view that the two notches 26a, 26b and the Vee notch 24 of the piston, delimit a passage having a section of rounded shape, close to a circle and variable as a function of the relative position of the two nozzles and of the piston and the wires 28 are clamped between the two nozzles and the piston which keep them well grouped, which is the desired effect in order to be able to simultaneously crimp the same connection piece on the ends of several wires which must be kept in contact narrow.
  • We also see in this figure that if we present a new wire 29 between the beaks of the pliers by exerting on this wire a force directed downwards, this new wire is supported on the ramps 25a and 25b and exerts on the beaks a couple which tends to spread them apart until the new wire passes between the tips of the two beaks and joins the bundle of wires 28 already held by the clamp. During the introduction of the new wire, the bundle of wires 28 already in place in the clamp remains maintained by the combined action of the two nozzles and of the piston 20 and none of the wires can come out of the clamp.
  • The intermediate view in FIG. 3 represents a clamp opened by a support which is exerted vertically on the raised lugs 27a and 27b by means of a jack or any other equivalent pusher. The spouts 15a and 15b are separated and the piston 20 pushed by the spring 21, ejects the wires from the clamp.
  • We see in the right view that the two elementary clamps are connected together by two spacers formed by two folded plates 30a and 30b, on which the thrusts of the return springs 17a and 17b are exerted.
  • Figure 5 is an elevational view of a device mechanical introduction of the son in the clamps according to the invention.
  • This figure shows a clamp 15 mounted on a base 13 and formed by two identical elementary clamps which each have two spouts 15a and 15b.
  • A device according to the invention comprises a jack 31, the rod of which actuates two identical clamps each formed by two jaws 32a and 32b, the spacing of which is greater than the transverse dimensions of the two pairs of jaws of the clamps 15, so that the two pairs of jaws 32a and 32b are located on either side of the two elementary clamps constituting a clamp 15 when the jack 31 moves them downwards.
  • A wire 29 is clamped between the two pairs of jaws 32a and 32b.
  • The downward movement of the jack 31 presses the wire 29 against the two inclined ramps 25a and 25b, which causes the spouts 15a and 15b to be separated and the wire 29 to be inserted into the clamp 15. The jack 31 then actuates the opening of the jaws 32a and 32b and raising them.
    Figure 6 is a vertical section of a wire introduction device according to Figure 5, in the position where the jaws 32a and 32b and the ascent thereof.
  • Figure 6 is a vertical section of a wire introduction device according to Figure 5, in the position where the jaws 32a and 32b are open.
  • The device according to FIGS. 5 and 6 makes it possible to successively introduce several wires of the same diameter or of different diameter, in the same clamp.
  • FIG. 3 represents an exemplary embodiment in which the notch 24 of the piston 20 and the notches 26a, 26b of the spouts have a shape such that they define a substantially circular passage.
  • We can realize other forms.
  • Figure 7 shows an example in which the notch 24 of the piston 20 has a very large opening angle and the notches 26a and 26b have a large curvature, so that the wires 28 form a flattened beam in the direction perpendicular to the plane of symmetry PP '.
  • It is also possible to associate a piston 20 having a very closed notch 24 with not very concave notches 26a and 26b in order to obtain a grouping of the wires 28 in the form of a flattened beam situated in the plane of symmetry PP 'as shown in FIG. 7.
    Or saw that the support 8, 10 which connects each clamp to the conveyor 1, comprises a cap 10 which covers a pillar 8b and which is pushed upwards by a spring 9.
  • By pressing vertically on the top of the cap 10 by means of a pusher, a vertical displacement of the pliers is obtained which allows, for example, to lower the wires in a crimping tool or to dip the ends of the wires in a water bath. tinning.

Claims (10)

  1. A clamp for fitting to a conveyor in an automatic cabling machine for the purpose of holding one or more electrically conductive wires, characterized in that said clamp includes two pairs of jaws (15a, 15b) hinged to a fixed base (13), each of said pairs comprising two jaws which are symmetrical about a plane of symmetry (PP') and which are fitted with return means (17a, 17b) for urging them automatically towards a closed position, said pairs being spaced apart by an intermediate space (19), said clamp further including a central piston (20) which is situated in said intermediate space, which is symmetrical about said plane of symmetry (PP'), and which is fitted with return means (23) for urging it automatically towards the three ends of said jaws.
  2. A clamp according to claim 1, characterized in that the upper face of said piston includes a V-shaped notch (24) which is symmetrical about said plane of symmetry and which is outwardly flared.
  3. A clamp according to claim 2, characterized in that an inside edge of the free end of each jaw is provided with a slope (25a, 25b) which is down and inwardly inclined.
  4. A clamp according to claim 3, characterized in that the inside edge of each of said jaws includes a concave notch (26a, 26b) situated beneath the bottom end of said slope (25a, 25b) and delimiting in conjunction with the flared notch (24) in the upper face of said piston (20) a passage of variable section in which one or more electrically conductive wires (28) may be held together.
  5. A clamp according to one of the claims 1 to 4, characterized in that each of the jams include a projecting lug (27a, 27b) enabling said jaws to be moved apart by pressing against said lugs, thereby causing the wires held by said clamp to be ejected.
  6. A clamp according to claim 4, characterized in that said flared piston notch (24) and said concave jaw notches (26a, 26b) are shaped so as to delimit a passage which is generally circular in shape.
  7. A clamp according to claim 6, characterized in that said piston notch (24) is widely flared and said jaw notches (26a, 26b) are highly curved, thereby delimiting a passage which is elongate in a direction perpendicular to said plane of symmetry (PP'), enabling thus a plurality of wires to be brought toghether side-by-side in order to form a flat bundle.
  8. A clamp according to claim 6, characterized in that said piston notch (24) has a small aperture angle and said jaw notches (26a, 26b) are only slight curved, thereby delimiting a passage which is elongate in the plane of symmetry, enabling a plurality of wires (28) to be brought toghether side-by-side in order to forme a flat bundle.
  9. A clamp according to one of preceeding claims 1 to 8, characterized in that said clamp is mounted on a conveyor by means of a support (8, 10), said support being capable of being displaced vertically by a vertical pusher, thereby enabling the lengths of wire held by said clamp to be displaced vertically.
  10. A device for inserting wires into a clamp according to one of the claims 1 to 9, characterized in that said device comprises two pairs of jaws (32a, 32b) which are actuated by an actuator (31) and which are space further apart than the overall width of said clamp.
EP88430017A 1987-08-07 1988-07-15 Automatic wiring machine conveyors fitted with pliers for retaining one or several conductors Expired - Lifetime EP0305307B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8711392A FR2619038B1 (en) 1987-08-07 1987-08-07
FR8711392 1987-08-07

Publications (2)

Publication Number Publication Date
EP0305307A1 EP0305307A1 (en) 1989-03-01
EP0305307B1 true EP0305307B1 (en) 1993-06-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP88430017A Expired - Lifetime EP0305307B1 (en) 1987-08-07 1988-07-15 Automatic wiring machine conveyors fitted with pliers for retaining one or several conductors

Country Status (6)

Country Link
US (1) US4877228A (en)
EP (1) EP0305307B1 (en)
JP (1) JPH0632245B2 (en)
DE (2) DE3881791D1 (en)
ES (1) ES2040887T3 (en)
FR (1) FR2619038B1 (en)

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Also Published As

Publication number Publication date
EP0305307A1 (en) 1989-03-01
JPH0632245B2 (en) 1994-04-27
US4877228A (en) 1989-10-31
JPH01186578A (en) 1989-07-26
FR2619038B1 (en) 1993-02-26
ES2040887T3 (en) 1993-11-01
DE3881791D1 (en) 1993-07-22
FR2619038A1 (en) 1989-02-10
DE3881791T2 (en) 1993-10-07

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