EP0458660B1 - Installation de piquage, notamment pour garnitures de sièges de véhicule automobile - Google Patents

Installation de piquage, notamment pour garnitures de sièges de véhicule automobile Download PDF

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Publication number
EP0458660B1
EP0458660B1 EP19910400728 EP91400728A EP0458660B1 EP 0458660 B1 EP0458660 B1 EP 0458660B1 EP 19910400728 EP19910400728 EP 19910400728 EP 91400728 A EP91400728 A EP 91400728A EP 0458660 B1 EP0458660 B1 EP 0458660B1
Authority
EP
European Patent Office
Prior art keywords
piece
aforesaid
stitching
plate
blade
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
EP19910400728
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0458660A1 (fr
Inventor
Georges Loulier
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0458660A1 publication Critical patent/EP0458660A1/fr
Application granted granted Critical
Publication of EP0458660B1 publication Critical patent/EP0458660B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B21/00—Sewing machines with devices for automatically controlling movement of work-carrier relative to stitch-forming mechanism in order to obtain particular configuration of seam, e.g. programme-controlled for sewing collars, for attaching pockets
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/02—Work-feeding or -handling elements not otherwise provided for for facilitating seaming; Hem-turning elements; Hemmers
    • D05B35/04—Work-feeding or -handling elements not otherwise provided for for facilitating seaming; Hem-turning elements; Hemmers with movable tools

Definitions

  • the present invention relates to a stitching installation, in particular for seat covers for motor vehicles
  • stitching installations comprising a fixed sewing machine and a movable stitching piece along the orthogonal axes X and Y
  • the pieces to be sewn are however fixed on jigs, which necessarily requires one jig per piece with consequently the impossibility manually load parts in hidden time
  • stitching installation using a mobile sewing machine without stopping movement at each point see document US.A.4 503 789 for example.
  • these known installations only work for the stitching of small parts such as shirt cuffs.
  • the object of the present invention is to eliminate the above drawbacks of known installations.
  • the installation according to the invention for the stitching, in particular of seat trimmings of motor vehicles, of the type comprising a frame on which is arranged at least one stitching station equipped with means for holding the pieces of lining to be stitched, a movable sewing machine and means for controlling the sewing machine and its movement, is characterized in that the means for controlling the movement of the machine are arranged to allow movement thereof either continuously or step by step according to the nature of the pieces of filling to be stitched.
  • control means comprise a first table mounted movable in translation on the frame in a first direction, a second table on which the sewing machine is fixed and mounted movable in translation on the first table according to a second direction perpendicular to the first direction of the members, for example geared motors, respectively driving the first and second tables and a control unit transmitting control orders to the drive members.
  • the installation comprises, in order to produce at least one hem or pleat of a piece of trim at a given stitching station, a device for holding the trim piece on a worktop of the stitching station before and during the formation of the fold and arranged to cooperate with at least one edge of the work surface so as to form on the trim piece at least one fold line delimiting a foldable edge of the piece and a folding edge folding device on the trim piece and blocking the latter during the stitching of the folded edge on the trim piece.
  • the holding device comprises a jack secured to a vertically movable piece above the work surface and the jack rod of which controls the displacement in an approximately horizontal plane of at least one blade for holding the packing piece. so that the blade comes to rest on the trim piece when lowering the vertically movable piece with the free end of the blade parallel to the aforementioned edge and very close to it to form the foldable edge of the piece garnish.
  • the aforementioned cylinder has its horizontal rod secured to a support plate for two sleeves sliding bilaterally parallel to the work surface and both carrying the aforementioned holding blade.
  • the aforementioned cylinder has its horizontal rod controlling the simultaneous movement, by means of a lever assembly and two control rods, of two blades for holding the trim piece capable of coming in. pressing on it with their free ends parallel respectively to two opposite edges of the work surface and close to these to form two foldable edges of the trim piece.
  • the two aforementioned control rods are connected hinged respectively to two plates each supporting two sleeves sliding bilaterally parallel to the work surface and both carrying a holding blade.
  • the aforementioned folding and blocking device comprises at least one actuator integral with the frame at the level of the work surface and the horizontal rod of which carries a blade arranged parallel to a flange of the work surface and capable of advancing towards the trim piece so as to fold down the foldable edge of the trim piece and keep the folded edge resiliently by its free end after the latter has passed the edge of the worktop.
  • the aforementioned blades are each L-shaped, the horizontal part of which is flexible.
  • the installation also includes, for carrying out at a specific position the stitching of sleeves on a piece of trim in order to create return lines on the externally visible piece, a spool formed by a rolled up sheath band, secured to a freely rotating horizontal axis fixed on the sewing machine, a sheath band guide secured to the sewing machine, two jaws for driving the sheath strip and bringing it to a determined position under the needle of the sewing machine to allow the stitching of part of the sheath strip on the trim piece and a means, such as a bird, cutting the scabbard strip into a scabbard, preferably under the control of a pneumatic cylinder when the scabbard element has been pricked over a determined length.
  • the two aforementioned jaws are part of a clamp, preferably pneumatically controlled, attached to a rod of a control jack, preferably pneumatic, and pinch the sheath band through two slots in the sheath band guide to drag it under the needle.
  • the installation also includes, for carrying out the stitching of two or more pieces of superimposed fittings, a manually operable plate for blocking the pieces to be stitched, mounted relative to a work surface of the frame around an axis of horizontal pivoting and comprising a passage for the needle of the sewing machine and mechanical locking means in its locked position.
  • the above-mentioned vertically movable part, in the form of a plate, is controlled by a jack, preferably pneumatic, fixed to a beam of a gantry secured to the frame and is guided axially by three parallel and vertical shafts sliding relative to the beam.
  • the installation includes a control unit, preferably digital, and programmed to actuate in particular the various aforementioned jacks, the aforementioned clamp and control the movement of the sewing machine and its drive motor which is fixed directly to it. .
  • the stitching installation comprises a mechanically welded frame 1 carrying a table or carriage 2 movable in rectilinear translation in the direction X.
  • the table 2 itself supports a table or carriage 3 movable in translation straight in the direction Y perpendicular to the direction X.
  • On the table 3 is fixed by suitable means such as fixing screw, a sewing machine 4, the drive motor 5 of which is directly fixed to the sewing machine 4 by via a support plate 6 secured to the machine 4.
  • the table 2 is guided in the direction X by two parallel guide rods 7 secured to the frame 1 while the table 3 is guided in the direction Y by the intermediate two parallel guide rods 8 secured to the table 2.
  • Elements forming slides 9 secured to the tables 2 and 3 are provided to ensure frictionless guidance of each of these tables.
  • the movement of the table 2 is controlled by a geared motor assembly 10 driving a pinion meshing with a rack fixed to the frame 1, the pinion-rack assembly not being shown.
  • the movement of the table 3 is controlled by a geared motor assembly 11 driving a pinion meshing with a rack integral with the table 2, the pinion-rack assembly not being shown.
  • the power supply of the geared motor assemblies 10 and 11 and of the electric motor 5 of the sewing machine 4 is effected by means of two cable-carrying chains 12, 13, known per se, making it possible to follow the movements of the tables 2 and 3.
  • the guide rods 7, 8 and the racks associated respectively with tables 2, 3 are protected by bellows 14 and 15.
  • the sewing machine 4, known per se is of the type with large arms 4a, 4b and at large stroke of the needle 4c.
  • a gantry 16 is fixed to the frame 1 by its two vertical end columns 17 and to its upper part forming a chassis 18 for supporting a number of devices 19, which will be described later and intended for holding pieces of fabric upholstery.
  • the frame 1 also supports a frame 20 disposed under the gantry 16 and extending approximately over the entire length thereof.
  • the frame 20 secured to the frame 1 by means of screws supports the plates 21 serving as a work surface and the quantity of which depends on the number of stations.
  • Vertical posts 24 are fixed between the worktop plate 21 and the front spar 25 of the chassis 18 at equal or different intervals so as to define a certain number of work stations. They serve to support optical safety barriers known per se. In the present case, the posts 24 define five work stations, it being understood that this number is given only by way of nonlimiting example.
  • Each workstation is associated with a control panel 26 secured to the frame 20 and allowing an operator to perform functions which will emerge from the detailed description of the installation which will be made.
  • a numerically controlled device not shown and known per se, makes it possible to control the automatic programmed operation of the installation.
  • This part 27 is composed of a rear lower part of the back 28, a rear upper part of the back 29, a storage compartment 30, an elastic band 31 for the storage compartment 30, three profiles 32 made of plastic, a metal rod 33 and two elastic bands 34 arranged on the rod 33.
  • the production of the part 27 requires the use of the five workstations of the installation defined above.
  • the workstation 1 is the one furthest to the left with respect to FIG. 1 while the positions 2 to 5 are those which follow one another successively from left to right with respect to this figure.
  • Station 1 is designed to make an upper seam in the lower rear part 28.
  • Station 2 is designed to make lateral and lower seams in the lower rear part 28.
  • Station 3 is designed to sew elastic 31 on the pocket 30.
  • the station 4 is designed to assemble the three parts prepared at stations 1, 2 and 3.
  • the station 5 is designed to assemble the three sections 32 to the assembly produced at station 4.
  • FIG. 7 showing in detail a device 19 intended to be used at certain work stations to ensure the maintenance of trim parts.
  • a device 19 intended to be used at certain work stations to ensure the maintenance of trim parts.
  • three devices 19 are provided respectively at stations 1, 2 and 5.
  • Each device 19 comprises a jack 35, the vertical body 36 of which is fixed to the spar 25 and the rod 37 is mechanically coupled to a horizontal plate 38 with vertical movement guided by means of three equidistant vertical shafts 39 sliding in ball bushings 40 incorporated in three sleeves 41 coaxial with the shafts 39 and fixed to the spar 25 by fixing screws 42.
  • the shafts 39 are joined at their upper ends by a horizontal plate 43 using fixing screws 44, the plate 43 being coaxial with the body 36 of the jack 35 and moving relative to the latter.
  • the shafts 39 have their lower ends secured to the plate 38 by engaging in sleeves 45 fixed to the plate, fixing screws 46 securing the plate 38 to the trees 39.
  • To the plate 38 are assembled means for holding pieces of packing which differ according to the type of operation to be performed on a piece of packing at the work station where the device is located 19.
  • FIGS. 4A to 4D, 5 and 6 showing how a fold or hem of a part is formed and then sewn by the machine to sew 4.
  • the reference 47 designates a horizontal cylinder, preferably pneumatic, the body 48 of which is fixed to the work plate 21 and the rod 49 carries at its end a head 50 under which is fixed a flexible blade 51, for example made of steel, and having an L-shape with an elongated horizontal bar, the end of which is resiliently supported on the plate 21.
  • a screw 52 fixed in the head 50 makes it possible to adjust the elastic pressure exerted by the blade 51.
  • One piece of fabric P is placed on the working plate 21 so that one of its edges covers the end of the blade 51 and a flange 21a machined in the plate 21 extending substantially parallel to the end of the blade 51 which itself extends transversely to the longitudinal axis of the plate 21.
  • This assembly 53 is intended to hold the part P during the formation of a fold.
  • This assembly 53 has only been shown schematically for the moment because its structure differs according to the number of folds to be produced on the same piece P.
  • This assembly is fixed to the plate 38 of a device 19 and carries a flexible blade 54, for example of steel, in the form of L which can thus be moved vertically above the part P.
  • the assembly 53 is further arranged so as to allow the blade 54 to move parallel to the work plate 21.
  • the device 19 and the assembly 53 are controlled so as to position the blade 54 with the elongated edge thereof, extending transversely to the longitudinal axis of the plate 21, situated practically in line with the edge 21a.
  • the assembly 53 is then lowered towards the part P so that the end of the blade 54 in cooperation with the edge 21a creates a fold line P1 along the edge 21a.
  • the blade 54 is held in abutment on the part P while the jack rod 49 is moved towards the edge 21a (to the right with respect to FIGS. 4A-4D), which causes the blade 51 to fold down the foldable edge P2 of the part P above the blade 54.
  • the blade 51 is moved until its end resiliently presses the folded end of the edge P2 of the part P.
  • the blade 51 thus blocks or wedges the end of the folded edge on the work plate 21.
  • the assembly 53 is then controlled to move the blade 54 to the right with respect to FIG.
  • the device 19 is actuated to raise the blade 54 and completely disengage it from the work tray.
  • the sewing machine 4 is then moved according to a determined program triggered by the operator to a position where its needle 4c and its presser foot 4d are above the fold formed in line with a light 21b of the plate 21 for the passage of the needle 4c during the stitching of the fold.
  • the shape of the light 21b obviously depends on the configuration of the seam to be produced.
  • the light 21b is rectilinear and parallel to the rim 21a.
  • the blade 51 is removed from the fold of the part P by returning the cylinder rod 49 to the cylinder body 48.
  • the part P can then be used at another work station.
  • FIGS. 8 to 12 show in more detail the equipment making it possible to fold the upper edge of the rear lower part 28.
  • This equipment comprises the jack 47 fixed at its rear end to a vertical axis 55 secured to a base 56 fixed, by example by fixing screws, on the plate 21.
  • the base 56 carries two parallel sleeves 57 for guiding in rectilinear translation respectively of two parallel rods 58 integral with the head 50.
  • the head 50 can thus be moved between an inactive position defined in the left half-view of this figure corresponding to a retracted position of the actuator rod 49 and an active position for wedging the fold formed by the lower rear part of the backrest 28 shown in the half-view on the right of FIG. 8 and corresponding to an exit position of the jack rod 49.
  • the displacement of the head 50 and therefore of the blade 51 is thus carried out in a direction pe perpendicular to the longitudinal direction of the plate 21 symbolized in XX '.
  • the lower rear part of the backrest 28 is positioned laterally and behind on the plate 21 by positioning blocks 59 integral with the plate 21.
  • the upper assembly 53 now holding the part 28 during the formation of the fold of the upper edge of the part 28 comprises an actuator 60, preferably pneumatic, the body 61 of which is fixed at its rear end to a vertical axis 62 integral with a horizontal support plate 63 fixed to the plate 38 of the device 19.
  • the horizontal rod 64 of the jack 60 has its end mechanically connected to a vertical plate 65 to which two parallel sleeves 66 are secured symmetrically relative to the jack rod 64 and sliding on two guide rods 67, the ends of which are secured to the plate 63 by fixing lugs 68.
  • a vertical plate 69 extending under the sleeves 66 is secured by flexible fixing lugs 70 to the plate 65.
  • the plate 69 carries at its lower end an elastic blade 54 which is that shown in Figures 4A-4D.
  • the blade 54 is fixed to the plate 69 by fixing screws 71.
  • the plate 63 also supports two members 72 with end heads 73 each returned elastically downwards by a prestressed compression spring 74 bearing between the body 75 of the organ 72 and the head 73.
  • a pin 76 serves as a limit stop limit stop for the head 73 while allowing the head 73 to come closer to the body 75.
  • the organs 72 constitute additional means for holding the part 28 during of the fold formation.
  • Figures 13 to 22 show the equipment necessary to make the side and bottom seams of part 28 with the rod 33 housed in the fold of the lower edge of part 28 and the elastic bands 34 carried by the rod 33 and emerging from the fold at through corresponding cut-outs or notches 28a of the lower edge of the part 28.
  • the parts common to the equipment of stations 1 and 2 have the same references.
  • the jack 47 allowing the guided movement of the blade 51 carried by the head 50 to perform the folding of the rear edge of the part 28, the blade 51 being in the inactive position on the half left view of FIG. 13 and in the active position on the right half-view of this figure.
  • the part 28 is positioned on the plate 21 by two shims 59 in L integral with the plate 21 and in which bear respectively the two corners of the upper edge of the part 28 which has been folded and sewn at station 1.
  • the two lateral edges symmetrical of the part 28 each consist of two main sides 28b, 28c starting from the lower edge and defining between them an obtuse angle and a small side 28d extending the side 28c so as to define a connecting lug to the upper edge of the part 28
  • four blades 77, 78 conforming to the shape of the side edges are used.
  • the two blades 77 are identical as are the two blades 78 and are arranged symmetrically with respect to the axis YY ′ perpendicular to the axis XX ′ and passing through the longitudinal axis of the jack 47.
  • Each elastic blade 77 is fixed to a support head 79 to which two parallel rods 80 are secured, respectively sliding in two sleeves 81 integral with a base 82 fixed on the plate 21 so as to allow guiding in rectilinear translation of the head 79 between an inactive position and an active position .
  • the displacement of the head 79 is carried out by a jack 83, the body 84 of which is fixed at its rear end to the base 82 and the rod 85 is mechanically coupled to the head 79.
  • the mechanism for coupling the rod 85 to the head 79 must include a triangular return plate forming a lever 86 pushing or pulling the head 79 respectively according to the advancement or retraction of the cylinder rod 85.
  • the plate 86 pivots about a fixed axis 87 and is hingedly connected respectively to the end of the cylinder rod 85 and to the end of a yoke portion 88 articulated at its end opposite to the head 79 and substantially parallel to the guide rods 80.
  • Each blade 78 is carried by a head 89 with movement guided in rectilinear translation perpendicular to the axis YY ′ using elements 90-98 of structure and operation identical to the structure and operation of the elements 80-88 described previously.
  • the cylinders 93 extend in the same direction as the cylinders 47 and 83 and are approximately parallel to the axis Y-Y ′. It should be noted that each blade 78 has a main end parallel to the axis Y-Y ′ and another divergent end for folding the edge at the ear of the part 28.
  • the lumen 21b for passing the needle 4c of the machine 4 has a top view shape identical to the shape defined by the lateral and bottom edges of the part 28.
  • the plate 21 has a flange 21a surrounding the lumen 21b parallel to that -ci, the parts of the rim 21a corresponding respectively to the sides 28b, 28c, 28d of the part 28 being used to define the fold line of these edges.
  • the blade 51 comprises two rectangular cutouts 51a of identical shape to the cutouts 28a of the part 28 and aligned with the cutouts 28a when the part 28 is correctly placed on the work plate 21.
  • a plate 99 is fixed on the plate 21 and comprises two fingers 100 parallel to the axis YY 'and arranged in such a way that the cutouts 28a of the part 28 are approximately in alignment respectively with the two fingers 100 surrounding the latter when the part 28 is placed on the shoe 21.
  • the two fingers 100 each have a groove with a rounded bottom 101 for receiving the rod 33 which is held in abutment on the bottom 101 by a tongue elastic 102 conforming to the upper part of the rod 33.
  • the tongue 102 is sandwiched between the plate 99 and an upper plate 103 fixed to the plate 99.
  • Each elastic 34 mounts on the rod 33 passes between a lateral face of a finger 100 and the adjacent internal face of a cut 28a.
  • a groove portion 104 is machined by grinding on the plate 21 to allow the passage of the portion of the elastic 34 passing under the rod 33.
  • the elastic 34 passes through an opening 105 of a foot 106 secured to the plate 103 and is hooked to an anchor pin 50a fixed on the head 50.
  • Each elastic band 34 is thus kept prestressed during the stitching of the part 28.
  • the upper assembly 53 maintaining the part 28 on the plate 21 during the folding of the lateral and lower edges of this part comprises a jack 107, preferably pneumatic, simultaneously actuating two opposite parallel elastic blades in the shape of L 108 of shape corresponding to that defined by the sides 28b, 28c and 28d of the part 28 ( Figures 19 to 22).
  • the body 109 of the actuator 107 is fixed at its rear end to a support plate 110 by a vertical axis 111 integral with the plate 110.
  • the latter is assembled to the plate 38 of the device 19.
  • the rod 112 of the actuator 107 is connected so articulated by a yoke 113 at one end of a lever 114 pivoting about a vertical axis 115 integral with the plate 110.
  • the end of the lever 114 opposite that connected to the yoke 113 is connected in an articulated manner, by means of a yoke 116, at the end of a rod 117, the opposite end of which is connected in an articulated manner, by a yoke 118, to a vertical plate 119 moving in a guided manner in rectilinear translation above the part 28 perpendicular to the YY ′ axis.
  • the plate 119 supports two parallel sleeves 120 sliding respectively on two rods 121 secured to the plate 110 by fixing lugs 122.
  • the vertical plate 119 resiliently supports by its two ends a plate 123 for supporting a blade 108.
  • the elastic connection between the two plates 119 and 123 is effected by two upper and lower elastic blades 124.
  • the part of the lever 114 located between the axis 115 and the end connected to the yoke 113 is hingedly connected to a rod 117 identical to the rod 117 previously described so as to move the other blade 108 in a guided manner by means identical to the means 118-124.
  • the operator places the part 28 on the working plate 21 of the station 2 so as to position it by the positioning shims 59, which automatically brings the cutouts 28a in correspondence respectively with the two fingers 100, that is to say say that the latter are engaged substantially in alignment in the cutouts 28a.
  • the light 21b is covered by the lateral and lower edges of the part 28.
  • the operator places the rod 33 provided with its elastic bands 34 on the part 28 and the fingers 100 in elastically releasing up the flexible tabs 102 and then releasing them so that they elastically hold the triangle 33 on the fingers 100.
  • Each elastic 34 located between a finger 100 and a side edge of a cut 28a is passed through the opening 105 and attached to the corresponding foot 50a.
  • the rod 33 thus acts as a member for holding or blocking the lower edge of the part 28 on the plate 21 during the stitching operation.
  • the blades 108 of the upper equipment associated with the station 2 are previously positioned relative to the lateral edges of the part 28 by actuation of the jack 107 which moves the blades 108 in the direction of approximation or by means of the lever 114. a distance perpendicular to the axis YY 'according to the desired position. Once positioned, the blades 108 are lowered until they come to bear resiliently on the corresponding parts of the lateral edges of the part 28 so as to form the fold lines with the flange 21a and maintain the latter on the plate 21 during the formation of the corresponding folds.
  • the blades 51, 77 and 78 are then moved simultaneously by their respective actuating cylinders 47, 83 and 93 towards the lumen 21b.
  • the blade 51 during its movement, folds the outer part of the lower edge of the part 28 delimited by the rod 33 over the latter until its end resiliently maintains the folded part by wedging a portion of the folded edge on the rod 33.
  • the blades 77, 78 have folded down the lateral edges of the part 28 in the manner explained with reference in particular to FIGS. 4A-4D.
  • the reference 28 ′ appearing on the right half-view of FIG. 13 indicates the lateral and lower folded edges of the part 28.
  • the blades 108 are then released from their corresponding folds by actuation of the jack 107 by bringing them one of each other and raised by actuation of the jack 35 of the device 19.
  • the sewing machine 4 is then moved according to the work cycle indicated by the reference 125 in FIG. 13 so that the needle 4c is in alignment with the light 21b and follows the shape of the latter to sew the side and bottom folded edges of the part 28.
  • the blades 51, 77 and 78 are released from their holding position and the part 28 is removed from the work station 2 to be assembled at the station 4 as will be explained later.
  • the part 28 thus comprises the rod 33 held in its lower fold sewn with the elastic bands 34 held relative to the rod 33 by the cutouts 28a projecting from the part 28.
  • FIGS 23 to 27 show the equipment required at station 3 to sew the elastic 31 to the pocket 30.
  • the identical elements and performing the same functions as those described in the previous figures have the same references.
  • This equipment thus comprises a jack 47, the rod 49 of which guides the movement of a blade 51 intended to fold down an edge of the part 30 in the manner already described above.
  • a wedge 126 for positioning the lower edge of the part 30 and two lateral wedges 127 for positioning the lateral edges of the part 30.
  • the lateral wedges 127 terminate opposite the wedge 126 respectively by two fingers 128 defining with respect to the working plate 21 of station 3 a space allowing the passage of the elastic 31 and serving as a stop for two clamps 129 pinching the free ends of the elastic 31.
  • the light 21b for passage of the needle 4c of the sewing machine 4 has a straight portion elongated 21b1 extending parallel to the blade 51 over a length substantially equal to the latter and two small extreme straight portions 21b2 perpendicular to the portion 21b1 and extending towards the blade 51, the length of the portions 21b2 being slightly greater than the width of elastic 31.
  • the equipment further comprises a device 130 with studs or pins 131 capable of occupying an inactive position and an active position for holding the part 30 by pressure on the work plate 21.
  • the device 130 comprises two end angles 132 fixed, for example by fixing screws 133, and whose vertical cheeks 132a pivotally support between them a shaft 134 perpendicular to the axis YY ′ and to which an elongated U-shaped operating handle 135 is secured.
  • Parallel plates 136 fasten to the shaft 134 a plate 137 parallel to the shaft 134 and on which the studs 131 are fixed at regular intervals. In the present case, four studs 131 are provided.
  • These studs each have a head 131a and a threaded rod 131b screwed through the plate 137 and secured to the latter by a nut 138.
  • the two end plates 136 carry on their outer face respectively two axes 139 for hooking respectively of two ends of springs 140, the opposite ends of which are attached to two axes 141 integral with the cheeks 132a.
  • the springs 140 which are tension springs, have their contiguous turns and, in the active position of the device 130, are pulled so as to exert a component of forces tending to apply the studs 131 to the part 30 and to keep them in this position.
  • the branches of the handle 135 pass under the plate 137 as shown in the inactive position on the left half-view in FIG. 23.
  • the elastic 31 is sewn to the piece 30 as follows.
  • the device 130 is in the inactive position and the rod 49 of the jack 47 is retracted.
  • the operator positions the part 30 on the plate 21 by the shims 126-127 so that the upper edge of the part 30 covers the blade 51 as shown in FIG. 25.
  • the elastic band 31 is then stretched over the part 30 in passing under the two fingers 128 of the wedge 127 and the clamps 129 are hooked to the free ends of the elastic 31. By releasing the latter, the clamps 129 abut against the fingers 128 so as to keep the elastic 31 stretched.
  • the blade 51 is then moved by actuation of the jack 47 towards the portion 21b1 of the lumen 21b so as to fold the upper edge of the part 30 above the elastic band 31 and until the end of the blade 51 maintains elastically the fold formed on the elastic 31.
  • the handle 135 has been previously maneuvered so as to apply the studs 131 to the lower edge of the part 30 so that it is maintained during the operation of forming the fold and stitching of it.
  • the sewing machine 4 is then moved along the path shown in phantom at 142 in Figure 23 so that the needle 4c moves in alignment with the portions 21b2 and 21b1 of the light 21b to sew the fold and the elastic 31 to the piece 30.
  • the operating bar 135 is brought back to the inactive position and the blade 51 is released from the piece 30 which is recovered to be assembled, at station 4, to the piece 28 as carried out at stations 1 and 2.
  • Figures 28 to 33 illustrate the equipment of station 4 intended to sew part 28 on top of each other. provided with the rod 33 and the elastic bands 34, the part 30 with its elastic band 31 and the rear high back part 29 by a single seam connecting edge to edge the upper edge of the part 28, the edge of the part 30 opposite to that where the elastic 31 and the upper edge of the part 29 are sewn.
  • the part 28 is placed on the work plate 21 of the station 4 and positioned by two upper shims 143 and lower 144 parallel to the stitching light 21b , and two lateral shims 145.
  • the piece 30 is then placed on the part 28 by pulling the elastic 31 by its ends so as to pass them under two stop fingers 146 defining a space above the plate 21 and forming part each of a block 147 fixed on the plate 21 by fixing screws 148. Clamps 129, identical to those mentioned in the previous post, are fixed to the two free ends of the elastic band 31 so as to come into abutment against the two x fingers 146 after loosening of the elastic band 31, which is thus stretched during the stitching operation.
  • the part 30 is positioned on the part 28 by the wedge 143 and two lower wedges at an angle 149 secured to the plate 21.
  • the part 29 is then placed on the part 30, further covering the end of the part 28 comprising the rod 33 and the elastic bands 34 and the wedge 144 as shown in FIG. 30.
  • the part 29 is positioned by the wedge 143, a lower wedge 150 and two lateral wedges 151 secured to the plate 21.
  • a press plate 152 pivotally mounted in a vertical plane around a horizontal axis 153 integral with a stirrup 154 fixed on the plate 21.
  • the plate 152 comprises a slot 155 which, in the active position of the plate 152, is in alignment with light 21b.
  • On the plate 152 are fixed two vertical wings 156 and 157, the wing 157 being produced over the entire length of the plate 152 while the wing 156 is of shorter length so as to define by its ends two passages of the needle 4c of the sewing machine 4.
  • a third wing 158 is fixed, starting substantially from the axis 153. Between the wing 158 and the wing 157 is fixed a transverse axis 159, the two ends of which snap elastically respectively into two metal blades 160 forming a hook for holding the plate 152 in its inactive raised position shown in FIG. 29.
  • the blades blocking 160 are fixed, by fixing screws 161, to a bracket 162 integral with the plate 21.
  • the plate 152 comprises a grip handle 163 and is blocked in the active position by a locking device 164 locking a part horizontal forming the extreme finger 165 of the plate 152.
  • the device 164 comprises a plate 166 which can pivot on a horizontal fixed axis 167 in a plane perpendicular to the light 155 between an unlocking position of the finger 165 against the restoring force of a compression spring 168 and a locking position of the finger 165 at which it is held by a stop 169 on which an arm 170 for operating the plate 166 is supported by the action of the restoring force exerted by the spring 168.
  • the axis 167 is integral with a bracket 171 fixed to the plate 21 by fixing screws 172.
  • the plate 166 has an upper part 166a forming a locking hook for the finger 165.
  • the plate 152 is unlocked by operating the bar 170 in the unlocking direction and the elastic retaining clips 31 are removed, which puckers the corresponding edge of the part. 30. This assembly of parts is then brought to station 5 to be assembled with the three plastic profiles 32.
  • This equipment includes means for positioning and maintaining the assembly of the parts 28-30 made at station 4 and designated for simplicity by the general reference P .
  • These means include upper and lateral wedges 174 fixed on the plate 21 using fixing screws 175 whose internal faces 174a ensure the lateral positioning of the profiles 32 comprising a base plate 32a bearing on the plate 21 by overlapping the lumen 21b for needle passage 4c and a hook-shaped part 32b bearing against the internal faces 174a of the shims 174.
  • the profiles 32 are held in this position by a certain number of elastic tabs 176 fixed on the shims 174 by fixing means, such as rivets 177. These tongues bear elastically on the hook part 32b of each profile 32.
  • the part P is placed on the work plate 21 in coming to cover by its lateral and upper edges the flat faces 32a of the profiles 32 and is positioned on the one hand by a positioning wedge 178 secured to the plate 21 and on the other hand by free ends of the hook parts 32b of the profiles 32 and against which the lateral and upper edges of the workpiece P come to bear.
  • Side shims 179 of the plate 21 are also provided for positioning the workpiece P.
  • the part P has two ears P3 in extension on either side of the elastic 31 and hung on two fixed spouts 180 so as to tension the elastic 31 during the stitching of the profiles.
  • Each spout 180 is integral with a plate 181 with oblong holes 182 for adjusting the position of the plate 181 in a direction perpendicular to the axis YY ′ according to the determined tension to be exerted on the elastic band 31, the plate 181 being fixed at the desired position by fixing screws 183.
  • the position of each plate 181 is adjusted by a freely rotating screw 185 in a block 184 secured to the plate 21 and the threaded end of which is screwed into the plate 181.
  • the equipment of the station 5 also comprises two devices 186 for holding the part P during the stitching of the profiles 32 therein.
  • Each device 186 comprises a lever 187 pivoting around a fixed axis 188 mounted on a support bracket 189 secured to the plate 21 by fixing screws 190.
  • the lever 187 has one of its lever arms 187a, of greater length, carrying at its end a stud 191 intended to exert a holding pressure of the part P on the plate 21 and its other lever arm 187b, of shorter length, connected in an articulated manner by an axis 192 to a plate 193 for controlling the pivoting of the lever 187.
  • An operating handle 194 of the plate 193 is attached to the latter.
  • the plate 193 is also connected in an articulated manner by an axis 195 to the end of an arm 196, the opposite end of which pivots about a fixed axis 197 secured to the stirrup 189.
  • the operation of the device 186 is deduced easily from FIG. 35.
  • the pivoting of the lever 187 from its active position for wedging the part P to its approximately vertical inactive position shown in phantom is carried out by operating the handle 194 in the direction of the arrow F1, this which results in the pivoting of the arm 196 around the axis 197 along the arrow F2 and the plate 193 acts on the end of the lever arm 187b along the arrow F3 to pivot the lever 187 upwards.
  • FIGS. 39 to 42 represent the upper part of the equipment of the station 5 intended to hold the part P during the stitching of the profiles 32.
  • This upper part includes two sets of flexible L-shaped side blades 198 and an upper flexible blade 199.
  • Each set of blades 198 comprises three separate blades fixed respectively to three support plates 200, using fixing screws 201, substantially parallel to the axis YY ′ of FIG. 39 and comprising oblong notches 202 crossed by the screws 201 to adjust the position of the blades 198 in the direction perpendicular to the axis Y-Y '.
  • the plates 200 are secured to fixed arms 203 in the form of plates perpendicular to the axis YY 'and secured to a sheath 204 parallel to the axis YY' rotates around an axis 205.
  • each sheath 204 is also secured a plate 206 extending opposite the plates 203 parallel to them or extending them and comprising a tab 207 perpendicular to the plate 206.
  • a vas 208 passing through the plate 207 is secured to the latter by a nut 209 and serves as a stop for angular positioning of the plate or plates 203 associated in the inactive position.
  • the screws 208 come into abutment against the underside of an upper support plate 210 secured to the plate 38 of the device 19.
  • the common axis 205 of rotation of the sleeves 204 is secured to the plate 210 by fixing feet 211
  • the plates 203 are joined, for example by welding and perpendicular thereto, lugs 212 crossed by threaded rods 213 secured to the lugs 212 by nuts 214.
  • Each threaded rod 213 carries a nut 215 serving as a bearing face of an extreme turn of a spring 216, the opposite end turn of which rests on the bottom of a blind hole 217 of the plate 210.
  • the rod 213 and spring 216 assembly is arranged parallel to the screw 208 opposite to the latter relative to the sleeves 204.
  • FIG. 42 shows precisely these means allowing the blade 199 to be affixed in abutment on the corresponding edge of the part P with pivoting in the clockwise direction of the two plates 203 against the restoring force springs 216.
  • the needle 4c moves step by step to stitch the profiles to the part P in order to avoid breaking the needle passing through the relatively hard plastic material of these profiles.
  • the dashed line bearing the reference 218 symbolizes the working cycle of the machine 4 so that the needle 4c sews the lateral and upper edges of the part P on the profiles 32.
  • FIGS. 44 to 46 represent a device 219 for sewing sheaths 220 of fabric onto a piece of fabric 221 as shown in FIGS. 43A and 43B, the piece 221 being firmly held appropriately on the tray 21 of a work station, for example using pressure pads or a pressing plate already described above.
  • the device 219 comprises a reel 222 constituted by the winding of a strip of fabric forming a sheath mounted on an axis 223 freely rotatable on a support 224 secured to the sewing machine 4.
  • the strip forming a sheath 225 passes through a guide 226 by means of a return pulley 227 which is fixed with the guide 226 to the machine 4 by means of a support 228.
  • the guide 226 comprises a vertical rectilinear part followed by a curved part extended by a part rectilinear making an obtuse angle with respect to the plate 21. This last part comprises two opposite parallel openings 229 for the passage of two jaws 230 for gripping and driving the sheath band 225 over a determined distance A.
  • the jaws 230 form part a clamp with penumatic control, known per se, which can move in a guided manner in the direction of the lights 229 under the control of a pneumatic cylinder 232, the cylinder rod of which comprises e a yoke 233 enclosing a bent portion 234 of a plate 235 secured to the clamp body 231.
  • the guide of the pin body 231 is provided by a slide 236 secured to the plate 235 and guided in rectilinear translation by a slide 237 secured to a fixed plate 238 forming part of the support 228.
  • the sheath strip 225 comprising a sharp blade 239 pivotally mounted about an axis 240 secured to a fixed frame 241 under the control of a pneumatic cylinder 242 whose rod 243 is connected to the blade 239 by a yoke 244.
  • the operation of the device 219 is as follows.
  • the sewing machine 4 After placing a piece of fabric 221 on the plate 21, the sewing machine 4 is moved in the X and Y directions so that the needle 4c is positioned along a stitching line.
  • a sheath strip 225 is placed under the needle 4c by the jack 232, the clamp 231 and the jaws 230.
  • the sewing machine is started and is moved so as to sew the strip over a determined length or dimension. sheath 225 on the piece 221.
  • the needle moves for this in the direction indicated by the arrow F4 of FIG. 44.
  • the dimension is preferably programmed by the numerically controlled device, and when this dimension is reached, the device with numerical control causes the sewing machine to stop and its movement to stop.
  • the jack 224 actuates the cutting blade 239 to cut the sheath strip 225 and when the cutting operation is finished, the sewing machine 4 ends its stitching cycle of the sheath 220 on the part 221.
  • the installation may include safety barriers at each workstation, of the type with light beams forming a protective curtain validated by the operator using the control console 26 associated with the workstation. work, the sewing machine 4 being then authorized, by the operator, to carry out a stitching operation previously programmed in the numerically controlled device at a work station, while allowing work in hidden time since it is possible to prepare a post while the sewing machine is working on another.
  • the numerically controlled device is adapted to actuate automatically, according to programmed cycles, all the various actuators and controllable elements mentioned above and put the drive motor 5 of the elbow machine 4 into service.
  • the parts to be assembled by stitching are placed manually at each work station and then locked in position by means of the control panel 26 and the corresponding jacks under the control of the numerically controlled device.
  • the installation according to the invention makes it possible to sew trim pieces in extremely short time periods by increasing the quality of sewing while having excellent reliability and increased productivity.
  • the numerically controlled device in the case of a step by step or intermittent stitching, when this is necessary to avoid bending or breaking of the needle 4c during the stitching of hard material (elastic or leather) or during stopping movements X and Y when the needle 4c comes into contact with the fabric and leaves it after making a knot, can control the following movement X and Y in 0.05 seconds for a stitch 5 mm at a rate of 500 points per minute.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP19910400728 1990-04-25 1991-03-18 Installation de piquage, notamment pour garnitures de sièges de véhicule automobile Expired - Lifetime EP0458660B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9005280A FR2661427A1 (fr) 1990-04-25 1990-04-25 Installation de piquage, notamment pour garnitures de sieges de vehicule automobile.
FR9005280 1990-04-25

Publications (2)

Publication Number Publication Date
EP0458660A1 EP0458660A1 (fr) 1991-11-27
EP0458660B1 true EP0458660B1 (fr) 1995-05-17

Family

ID=9396080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910400728 Expired - Lifetime EP0458660B1 (fr) 1990-04-25 1991-03-18 Installation de piquage, notamment pour garnitures de sièges de véhicule automobile

Country Status (4)

Country Link
EP (1) EP0458660B1 (sr)
DE (1) DE69109743T2 (sr)
ES (1) ES2074671T3 (sr)
FR (1) FR2661427A1 (sr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012025274A1 (de) 2010-08-27 2012-03-01 Johnson Controls Gmbh Fertigungsvorrichtung und verfahren zur herstellung eines sitzbezuges

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116641190B (zh) * 2023-07-27 2023-09-22 延锋(南通)座椅有限公司 一种座椅面套多头同步缝纫系统及其使用方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4503789A (en) * 1983-04-20 1985-03-12 Kochs Adler Ag Automatic sewing machines
AT385529B (de) * 1986-03-07 1988-04-11 Sahl Kg Apparate Und Steuerung Faltvorrichtung zur doppelfaltung eines randstreifens textiler werkstuecke, insbesondere fuer ein nachfolgendes saumnaehen
JP2653050B2 (ja) * 1987-04-24 1997-09-10 ブラザー工業株式会社 自動縫製機
DE3818814C1 (sr) * 1988-06-03 1989-12-14 Eisele Apparate- Und Geraetebau Gmbh, 7070 Schwaebisch Gmuend, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012025274A1 (de) 2010-08-27 2012-03-01 Johnson Controls Gmbh Fertigungsvorrichtung und verfahren zur herstellung eines sitzbezuges

Also Published As

Publication number Publication date
ES2074671T3 (es) 1995-09-16
DE69109743T2 (de) 1995-12-21
FR2661427B1 (sr) 1994-04-22
DE69109743D1 (de) 1995-06-22
FR2661427A1 (fr) 1991-10-31
EP0458660A1 (fr) 1991-11-27

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