Classifications

• • D—TEXTILES; PAPER
  • D05—SEWING; EMBROIDERING; TUFTING
  • D05B—SEWING
  • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
  • D05B3/12—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for fastening articles by sewing
  • D05B3/22—Article-, e.g. button-, feed mechanisms therefor

Definitions

• the invention relates to a device for button sewing machines for automatically feeding the buttons to be sewn on according to the preamble of claim 1.
• a button sewing machine with a button sorting and feeding device for different button shapes and sizes which has an obliquely arranged button magazine with a button-issuing opening, which is followed by an obliquely arranged fail channel, at the lower end of which is a so-called Gate device is arranged, which in turn is followed by a button removal and positioning device.
• the button-issuing opening is adapted to the envelope surface of the buttons to be processed and is placed in an exchangeable plate, to which the buttons are conveyed by means of a conveyor scoop arranged in the magazine.
• buttons Conveyor scoop-related turning of the buttons in such a way that they assume the intended position at the button-issuing opening and slip through the opening.
• the gate device takes over the necessary separation of the button chain located in the fail channel. Only the bottom button is released in time with the button removal.
• the button is taken over by a feed arm and positioned on this arm by means of a button turning orientation device in such a way that its bores snap into guide pins. Then it is fed in a correspondingly positioned position for the purpose of sewing on a button clamping device.
• buttons of different sizes and / or shapes on this device some parts have to be replaced.
• the plate in the magazine with the button-emitting opening and - far more complex - the fail channel should be replaced.
• the cross-section of the channel must also be adapted to the size and shape of the buttons to be fed. This means that gutters with different cross sections are required for different buttons.
• DE-OS 2 146644 describes a sewing machine for sewing buttons.
• This button sewing machine has an oscillating pot that conveys the buttons to open a feed channel, a resilient slide, through which they successively reach a fixed, narrowing slide and from there to a guide channel.
• the button located in this guide channel in each case is transported by a slide to a button receiving opening arranged in an insert, through which it reaches a transfer arm with button receiving pins.
• a rubber driver is lowered onto the button.
• the button is then fed through the transfer arm of clamping jaws, which fix it during the sewing process.
• Another disadvantage of this solution is that when changing from buttons of a certain size to buttons of a different size, the two slides, the guide channel and also the insert with the button receptacle opening have to be replaced.
• the object of the invention is to provide a device for button sewing machines for the automatic feeding of the buttons to be sewn into the area of the jaws of a button clip, which reliably allows buttons of different shapes and sizes to be fed and in which an exchange of individual ones of the separating, aligning and feed serving elements is largely avoided when changing to a different type of button.
• the task is also to design the device so that the buttons can leave the feed channel to the positioning device individually and without hindrance.
• the object is achieved by a device according to the characterizing part of claim 1.
• a button conveyed through the feed channel passes unhindered into a funnel-shaped connecting piece and is held there in waiting position on the sloping bottom surface of the connecting piece by the cavity to be narrowed downward.
• This connecting piece is formed from the bottom surface, a top surface and two parts which can be moved in opposite directions and takes over the function of a funnel. Due to the movable parts, it can be opened downwards towards a rotating device for the purpose of button transfer.
• the connecting piece is formed by two essentially U-shaped parts which can be moved in opposite directions, the legs of which form the bottom and top surfaces.
• the two side parts are spread apart and the button slides onto the rotating device by means of the oblique sliding plate. So that the button automatically slips out of the connector, the bottom of the connector must or the sliding plate have an angle of inclination that is equal to or greater than the friction angle.
• a compressed air nozzle is arranged in the area of the connecting piece, the air jet of which is directed towards the receiving prism essentially parallel to the longitudinal direction of the connecting piece.
• a passage opening for the air flow is arranged in the jaws of the receiving prism arranged opposite the connecting piece.
• the button sliding on the rotating device is centered there by the two jaws of the receiving prism without the button being clamped between the jaws, so that it can be rotated about its axis.
• the connecting piece carrying one jaw of the receiving prism and the opposing jaw are each mounted on a swivel arm and their distance from one another can be adjusted by means of these two swivel arms, in such a way that both jaws each experience the same adjustment movement in opposite directions.
• buttons to be fed regardless of their size, always have the same center point after being centered by the receiving prism.
• the two swivel arms are arranged at an acute angle to one another in a plane parallel to the rotating device and can be swiveled in opposite directions about a common point. Separate storage of the two swivel arms is also possible.
• the setting angle between the two swivel arms is advantageous by means of a spacer arranged and displaceable between them changed, which changes the minimum distance between the jaws of the receiving prism.
• the spacer is advantageously connected to the movable jaws of a setting gauge, into which a pattern button of the button type to be processed can be inserted.
• the spacer is assigned a position corresponding to the inserted button size between the swivel arms, and at the same time the distance between the jaws of the receiving prism is adapted to this button size.
• the operator is thus able to make any change to a different button size in the simplest way without changing parts.
• the reliability of the button feed is increased in that a between the vibrating pot and the feed channel
• Separating device is arranged, which is only one at a time
• buttons are separated at the exit of the
• the separating device has a metering disc with several receiving openings of different widths and is locked onto a driven base part in such a way that the receiving opening assigned to the size of the buttons to be fed can be moved between a receiving position located at the exit of the oscillating pot and a delivery position at the inlet of the feed channel.
• the width of the receiving opening should be selected so that only one button can be picked up at a time. In the case of round buttons, such a receiving opening must therefore be selected, the width of which is smaller than twice the button diameter. It is of constructive advantage to arrange the receiving openings on the circumference of the distribution disk and in to be essentially U-shaped.
• an intermediate disk is arranged above the metering disk and has projections projecting into the receiving openings.
• the vertical distance between the two discs is adjustable and is chosen so that the clear height under the projection of the selected receiving opening is greater than the button thickness and less than twice the button thickness.
• a turntable is additionally attached, which has visible markings on its top, which correspond to the receiving openings in the metering disk, so that the operator can use the receiving opening to be used for the respective button size safely and without Select effort and then turn the metering disc relative to the base part accordingly.
• a button transferred from the oscillating pot into the feed channel by means of the separating device then automatically reaches the funnel-shaped connecting piece and from there to the rotating device, where it is rotated and aligned between the jaws of the receiving prism and thereby fixed by guide pins of a feed arm engaging in the buttonholes and then fixed by the The feed arm is transferred to the area of the clamping jaws of a button clamp and is taken over by it.
• 1 is a schematic representation of a device for automatic button guidance
• FIG. 2 shows a plan view of the sectional plane VIII-VIII (FIG. 8) of the positioning device belonging to the device according to FIG. 1,
• FIG. 7 is a plan view of the rotating device belonging to the positioning device, partially broken,
• Fig. 8 is a side view of the positioning device with the jaws of a button clip.
• the device according to the invention for the automatic feeding of the buttons to be sewn on consists of a vibrating pot 1, a separating device 2 arranged thereon, a feed channel 3, a funnel-shaped connecting piece 4 connected to it, which opens above a rotating device 5, one arranged above the rotating device 5 and two Baking formed prism 6, a feed arm 7 and a button lammer 8 (Fig. 1, 2, 3).
• the buttons conveyed in the oscillating pot 1 reach the separating device 2.
• This consists of a fastening part 9, which at the same time as a continuation of the conveyor path of the vibrating pot 1
• Button inlet surface serves and is fastened by means of the plate 9a to the oscillating pot 1, a base part 10 arranged and driven under this fastening part 9 and a distribution disk 12 rotatably arranged above this fastening part 9 and provided with four receiving openings 11 of different widths (FIG. 4).
• the receiving openings 11 are U-shaped and are each offset by 90 ° on the circumference of the ZuteiIISA 12, the width of the smallest receiving opening is chosen so that a button of 8 mm in diameter can be easily accommodated and the largest a convenient recording a button of 25 mm allowed.
• the base part 10 and the metering disk 12 can be connected to one another by a pin 14 attached to the base part 10 and guided by an annular slot 13 in the fastening part 9, which engages in one of the bores 15 of the metering disk 12, so that the base part 10 is pneumatically connected driven piston rod 16 mediated movement is transmitted to the feed disc 12.
• the pneumatic cylinder guiding the piston rod 16 is attached to the plate 9a.
• an intermediate disk 17, which is provided with projections 18 projecting downward into the receiving openings 11 of the metering disk 12, and a cover disk 19, which has openings 20 corresponding to the receiving openings 11 of the metering disk 12 and with the cover disk 17, are arranged above the metering disk 12 is firmly connected by screws 21.
• the axis 22 and the collar 23 are arranged on the attachment disk 12, with which the attachment disk 12 is rotatably mounted in the fastening part 9.
• the axis 22 engages below the fastening part in the base part 10 and also serves as a bearing for the disc 17 located above the feed part 12 and the cover disc 19.
• the discs 17 and 19 are against the force of a compression spring 25 on the axis 22 of the allocation disk 12 attached.
• the base part 10 is fastened with a knurled nut 24a via the spring 25a on the axis 22 (FIG. 6).
• the setting of the separating device 2 to the button size to be conveyed takes place after selection of the opening 20 into which a button fits comfortably, by loosening the knurled nut 24, lifting and rotating the metering disk 12 such that the receiving opening 11 corresponding to the selected opening 20 is positioned is that it can be aligned both with the output A of the oscillating pot 1 and with the inlet E of the feed channel 3, and then the corresponding hole 15 snaps into place on the pin 14.
• the knurled nut is tightened so far that the vertical distance between the projection 18th in the selected receiving opening 11 and the fastening part 9 is larger than the button thickness and smaller than twice the button thickness.
• a button conveyed from the oscillating pot 1 at A (FIG.
• This connecting piece 4 consists of a mouth part 27 which is inclined downwards onto a turntable 5a and on which two parts 28 which can be moved in opposite directions and which have a U-shaped cross section are arranged, the two legs of the U-profile each having half of the bottom and form the top surface of a funnel-shaped and tapering approach.
• the inclination of the floor surface is 30 °.
• Both parts 28 have an angled and parallel to the turntable 5a extension. Both extensions form an angle of 120 ° and form the one jaw of a receiving prism 6 for the buttons.
• the parts 28 are arranged in opposite directions about the bearing points 30 and 31 in the mouth part 27.
• the pivoting movement is triggered by a link 34 connected to the piston rod 32 of a pneumatic cylinder 33, which is fixedly connected to one part 28 and a ring gear 35 within the mouth part 27, which in turn meshes with a ring gear 26 fixedly arranged on the second part 28.
• a lever (not shown) that can be pivoted onto the piston rod 32 is arranged on the pneumatic cylinder 33 and has a spacer that can be brought into contact with the piston rod 32, through which the sliding path of the piston rod 32 and thus the pivoting distance of the parts 28 for the purpose of adaptation to smaller ones Button diameter is reducible.
• a sliding plate 29 is arranged below the funnel-shaped connecting piece 4 or the two parts 28 which can be moved in opposite directions, parallel to the base thereof.
• a button conveyed by the feed channel 3 arrives in the cycle after the release of a previously conveyed button into the funnel-shaped connecting piece 4 which is then closed again and there
• an air outlet nozzle 36 Arranged below the sliding plate 29 is an air outlet nozzle 36 which emits an air stream which is oriented essentially parallel to the longitudinal axis of the funnel-shaped connecting piece 4 and which transfers the button from the connecting piece 4 to the Turntable 5a supported.
• the air flow is pressed through the gap between the sliding plate 29 and the turntable 5a onto the opposite jaws of the receiving prism 6 and is diverted there through a recess 50a in the jaw.
• an air outlet nozzle is arranged in the mouth part 27 and there in an area which lies behind the area in which a button to be fed comes to lie before it slides out of the connecting piece 4. This air outlet nozzle emits an air flow directed directly at the button and supporting the sliding out of the button.
• the turntable 5a is rotatably mounted in the base plate 37 and is fixedly connected to a ring gear 38 on the underside of the base plate 37, into which the pneumatically driven disc 5, which bears teeth on its outer circumference and is also mounted on the base plate 37, engages (FIG. 7 ).
• the disc 5 and the turntable 5a are moved in an oscillating manner by the movement of the piston rod 39. This movement is transmitted to the button lying on the turntable 5a and freely rotatable and centered between the jaws of the receiving prism 6, so that its buttonholes pass through a position in which guide pins 40 which can be exchangeably fastened to the feed arm 7 can engage (FIG. 8).
• the feed arm 7 is connected to the piston rod 41 of a movably mounted pneumatic cylinder and is arranged on the support block 42.
• a prestressed spring 43 which presses it down, engages, the prestressing of which can be adjusted by means of the knurled screw 44.
• the starting position of the feed arm 7 is given by the fact that it rests on the upstanding support block 42 and that the guide pins 40 are located above the button centering area of the receiving prism 6.
• the guide pins 40 are fixedly arranged on a finger 45 which is interchangeably attached to the feed arm 7 by means of a screw connection.
• the Feed arm 7 lowered so that the guide pins 40 engage in the buttonholes of the button which carries out an oscillating movement and fix it in the position predetermined by the arrangement of the guide pins 40.
• the feed arm 7 is pushed between the jaws of the button clamp 8 by a movement of the pneumatically driven piston rod 41, taken over by it and held in the sewing position.
• the feed arm 7 is then raised by the support block 42 and returned to its starting position.
• the lowering and raising of the feed arm 7 takes place synchronously with the movement of the support block 42, which is inclined and raised pneumatically via the lever 46 firmly connected to it.
• the support block 42 is mounted in the two legs of a U-profile piece 47 and is actuated by the piston rod 48 of the pneumatic cylinder 49 via the lever 46.
• the positioning of the button conveyed from the funnel-shaped connecting piece 4 onto the turntable 5a is carried out by the receiving prism 6, which is arranged closely above the turntable 5a and is formed from two jaws which are attached to pivot arms 50 and 51 so as to be movable in opposite directions (FIG. 2). .
• the center of the surface enclosed by the jaws of the receiving prism 6 is on the axis of rotation of the rotary mechanism 5a.
• One jaw is formed from the two extensions of the funnel-shaped connecting piece 4, which is fixedly arranged on the swivel arm 51 via the mouth part 27 and the angle piece 52, and the other jaw is formed directly on the swivel arm 50 and has a recess 50a for the air flow passage.
• the cheek surfaces form an angle of 120 °.
• Both swivel arms are pivoted at an acute angle to one another about the bolt 53 and are pressed against one another by the spring clamp 54.
• a Spacer 55 attached, which is displaceable in an elongated hole 56 in the base plate 37 along the connecting line between the bolt 53 and the pivot point of the turntable 5a.
• the spacer 55 acts with its mirror-like inclined surfaces directly on the arms 57 pressed against each other by the spring clamp 54.
• the spacer 55 By moving the spacer 55 in the slot 56, the distance between the two arms 57 and thus that of the swivel arms 50 and 51 is changed, the Size of the adjustment movement on both arms 57 is the same.
• the distance between the two jaws of the receiving prism 6 thus also changes symmetrically, and the center of the surface enclosed by the jaws of the receiving prism 6 remains in its position.
• the displacement of the spacer 55 takes place through the angular lift arranged under the base plate 37! 58, with which it is firmly connected.
• This angle lever 58 is displaceable against a stop 59 and, together with it, serves as an adjustment gauge for the receiving width of the receiving prism 6.
• the width of the receiving prism 6 is dimensioned in dependence on the width of the adjusting gauge so that a button located between its jaws on the turntable 5a , whose size corresponds to that of a button located in the setting gauge, can still be freely rotated between the jaws. This relation is determined as a function of the dimensions of the device parts by the position of the inclined surfaces of the spacer 55 relative to one another.
• a locking plate 60 provided with an elongated hole is attached to the angle lever 58, through which a locking screw 61 engaging in the base plate 37 is guided.
• a button to be conveyed from the receiving prism 6 between the clamping jaws of the button clamp 8 (FIG. 8) is moved by the feed arm 7 by means of the Guide pins 40 fixed and pushed against the spring action of the spring clamp 54 out of the prism and pressed between the clamping jaws of the button clip 8, which are also prestressed by spring action and which is adjustably arranged on the brackets 62.
• buttons are fed individually, which significantly increases the reliability of the button sewing machines, and that only the fingers 45 carrying the guide pins 40 on the feed arm 7 have to be exchanged when changing to a different button size with different hole spacings.
• the setting of the receiving prism 6 to the new button size is carried out by inserting a sample button into the setting gauge formed by the angle lever 58 and the stop 59, adjusting the separating device by rotating the metering disc and adjusting the distance of the button clip 8 in a known manner by means of a knurled screw.
• the button clip 8 In addition to the automatic feed, the button clip 8 also allows a manual button feed.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Sewing Machines And Sewing (AREA)

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Publications (1)

Family

ID=6393093

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (6)

Citations (3)

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• 1989
  • 1989-11-08 DE DE19893937146 patent/DE3937146C1/de not_active Expired - Fee Related
• 1990
  • 1990-11-02 WO PCT/EP1990/001841 patent/WO1991007535A1/de unknown

Patent Citations (3)

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