WO2000056969A1 - Dispositif de machine a coudre et a broder permettant de changer la canette du fil de dessous - Google Patents

Dispositif de machine a coudre et a broder permettant de changer la canette du fil de dessous Download PDF

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Publication number
WO2000056969A1
WO2000056969A1 PCT/EP2000/002072 EP0002072W WO0056969A1 WO 2000056969 A1 WO2000056969 A1 WO 2000056969A1 EP 0002072 W EP0002072 W EP 0002072W WO 0056969 A1 WO0056969 A1 WO 0056969A1
Authority
WO
WIPO (PCT)
Prior art keywords
bobbin case
bobbin
embroidery machines
receiving
lockstitch sewing
Prior art date
Application number
PCT/EP2000/002072
Other languages
German (de)
English (en)
Inventor
Philipp Moll
Haruhiko Kinoshita
Original Assignee
Kinoshita Precision Industrial Co. Ltd.
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 Kinoshita Precision Industrial Co. Ltd. filed Critical Kinoshita Precision Industrial Co. Ltd.
Priority to JP2000606825A priority Critical patent/JP2002539867A/ja
Priority to KR1020017012048A priority patent/KR20020010130A/ko
Publication of WO2000056969A1 publication Critical patent/WO2000056969A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
    • D05B59/04—Devices for changing the bobbin
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B37/00—Auxiliary apparatus or devices for use with knitting machines
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/26—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices

Definitions

  • the invention relates to a device on lockstitch sewing or embroidery machines for changing the bobbin for the hook thread according to the preamble of claim 1.
  • Lockstitch sewing machines usually have a hook with a hook tip that grips the needle thread loop and with a lower capsule mounted in the hook with a bobbin case received by the hook.
  • the lower capsule is provided with a pin which is arranged coaxially with the axis of the hook and which, when the bobbin case is inserted in the lower capsule, engages in a hollow cylinder arranged in the latter, which in turn bears the bobbin holding the hook thread supply.
  • the latter is provided in the area of its free end with an incision into which a locking bolt provided on the bobbin case engages.
  • the locking bar is displaceable in the bobbin case against the force of a spring and has an opening for the passage of the pin which is larger than the diameter of the pin by a certain amount.
  • the locking bolt thus secures the bobbin case in one of its end positions against falling out of the lower capsule and can be moved into its other end position, in which the bobbin case is released, against the force of a spring against the force of a spring by means of a flap which is pivotably arranged on the bobbin case and is movably connected to the locking bar can be removed from the lower capsule or from the gripper.
  • Locking bolt provided a nose bent substantially at right angles, which protrudes through a recess provided in the wall of the coil capsule in the interior thereof and secures the coil against falling out of the coil capsule.
  • the free end of the flap is bent slightly away from the bobbin case and can be relatively easily gripped by the operator to remove the bobbin case from the lower capsule and to insert it into the lower capsule.
  • the device according to JP 8-196766 has a hook held by a movable carrier, which engages behind the flap to remove the bobbin case and gives it a swiveling movement corresponding to the manual movement, at the end of which the flap rests on a support formed on the carrier is coming.
  • the locking bar carries out a corresponding transverse movement, as a result of which the bobbin case is released and, together with the bobbin, can be moved out of the lower capsule by the carrier which can move on a predetermined path.
  • the movement path is designed in such a way that the carrier is guided in a form-fitting manner and first executes a movement parallel to the axis of the gripper, which then changes into a swiveling movement, which is followed by an obliquely downward movement, at the end of which the bobbin case a cassette arranged below and to the side of the gripper is transferred.
  • a bobbin case equipped with a filled bobbin is inserted into the lower capsule.
  • the hook Since the bobbin case is thus held non-positively both during its movement from the gripper to the cassette and during the movement from this to the gripper by the hook, the hook must exert a correspondingly large pressing force on the flap during the entire duration of these movements.
  • a flap engaging hook is provided for gripping the bobbin case, which analogously to the device according to JP 8-196766 the flap during the movements of the bobbin case from the gripper to the cassette or from this to the gripper against one press the appropriate stop. Since a tongue is simultaneously formed on this stop, which engages in a flap provided in its end position in a recess provided on the flap anyway, the bobbin case is held during its aforementioned movements partly positively and partly non-positively.
  • the invention is therefore based on the object of improving a generic device in such a way that, on the one hand, the detection and holding of the bobbin case is simplified and, on the other hand, the design effort for changing the bobbin is reduced.
  • This object is achieved in a generic device in that the changing position of the receiving device is provided immediately to the side and essentially coaxially with the gripper, and the gripping device is movable along a path which is essentially parallel to the axis of the gripper between the latter and the changing position of the receiving device.
  • the arrangement according to the invention of the changing position of the receiving device not only considerably simplifies the handling of the bobbin case to be transferred, but rather results in an extremely short path for transferring the bobbin case from the pick-up device to the gripper, or from this to the pick-up device
  • Receiving device and the bobbin case inserted into the gripper is reduced to the amount required for the needle thread to pass through, is only slightly larger than the width of the bobbin case.
  • the design effort for transferring the bobbin case is significantly reduced, and on the other hand, due to the short path for the gripping device, there is also a corresponding time saving, which has a particularly strong effect in view of the fact that the gripping device has to cover this distance twice per changing operation .
  • the teaching according to the invention is independent of both the type and the position of the hook in the sewing machine. It does not matter whether it is a rotating gripper or a so-called vibrating gripper. It is equally irrelevant whether the hook rotates around a shaft parallel to the main shaft of the sewing machine or around a shaft that is transverse to the main shaft.
  • the teaching according to the invention can even be used in sewing machines with a hook rotating around a vertical shaft.
  • a space-saving solution which at the same time allows the bobbin capsules to be simply carried away with empty bobbins, is obtained when the receiving device can be pivoted about an axis that runs parallel to the gripper at a distance from it.
  • pick-up device can be pivoted about an axis that runs transverse to the axis of the gripper and intersects it.
  • Coil capsules of conventional design are provided for gripping and handling with a pivotable flap, the pivoting movement of which at the same time causes a displacement of the locking element which engages in an incision in the pin of the lower capsule and which is usually designed as a locking slide, whereby the coil capsule is released for removal from the gripper.
  • a solution that on the one hand can do without the flap that has been customary since then and on the other hand eliminates jamming or jamming of the bobbin case during its transfer from the gripper to the changing station of the receiving device results from the fact that the gripping device has two holding elements that can be moved on a slide parallel to the axis of the gripper for the bobbin case, of which the first holding element is provided with a holding finger which can be inserted in the direction of movement of the gripping device into a recess provided on the bobbin case and the second holding element has a holding lug which, when acting on the locking slide, can also be moved transversely to the longitudinal axis of the bobbin case .
  • the second holding element it can be pivotably mounted on the first holding element.
  • the recess for the first holding element is provided on the bottom of the bobbin case and the locking slide has an undercut adjacent to the recess, which is undercut by the holding lug of the second holding element.
  • the locking element is designed as a double leg spring with two legs directed essentially parallel to one another, one leg of which lies in the locking position of the locking element within the incision of the pin of the lower capsule and can be transferred into its release position by the gripping device.
  • the double leg spring can also serve at the same time to secure the coil inside the bobbin case if the free end of one leg of the double leg spring is bent essentially at a right angle and projects into the receiving space of the bobbin case for the coil when the double leg spring is in the release position .
  • a variant of the first gripping device has a spreading device for the double leg spring, which is provided with two fingers, which is moved by a slide that can be moved parallel to the axis of the gripper are movable between the legs of the double leg spring, wherein the leg unlocking the bobbin case is additionally movable transversely to the movement path of the slide.
  • the gripping device has a magnet carried by the slide, which cooperates with the end face of the bobbin case.
  • the carrier is detachably connected to it and can be locked with it by means of a quick-release fastener.
  • the take-up device can be re-equipped with bobbin capsules with filled bobbins at a separate point, regardless of the respective sewing process.
  • a particularly simple solution for driving the gripping device which as a whole only requires a linear movement thereof, is appropriate if the gripping device can be moved from the side of the carrier facing away from the gripper to the gripper.
  • the receiving device has means for fixing the spool capsules in the correct position in the receiving device.
  • the means for fixing the bobbin case are formed by two substantially vertically oriented and spaced-apart pins which protrude into a recess in the bobbin case, the mutual distance between the pins
  • the distance between the fixing pins arranged in the lower capsule for the coil capsule corresponds and the recess in the coil capsule which interacts with the fixing pins to fix them forms the recess for the pins of the receiving device.
  • the invention is based on the further object of simplifying the gripping device for detecting and transporting the bobbin cases from the gripper to the receiving device or from this to the gripper in such a way that the holding elements no longer require any parts which can be moved relative to one another.
  • the gripping device has a plurality of holding elements for the bobbin case movable on a slide parallel to the axis of the gripper, which can be inserted into openings provided in the bottom of the bobbin case and substantially parallel to the longitudinal axis thereof to the Detecting the bobbin case are movable within the openings transversely to the direction of movement of the gripping device.
  • the openings are designed as stepped bores, the large bore of which opens into the receiving space of the bobbin case for the bobbin.
  • a securing of the coil during the transfer of the bobbin case 101 from the gripper to the receiving device or from this to the gripper is achieved if at least one holding spring for the coil is assigned to the holding pins, which is directed essentially parallel to the latter and when moved into the openings Holding pin engages in a slot provided in the housing of the bobbin case.
  • a structurally simple solution for moving both the retaining spring and the retaining pin results from the fact that the retaining spring and the retaining pin are received by a common carrier and this is connected to the carriage.
  • pressure elements are provided on the holding pegs adjacent to the drivers, which are designed as cones, the small diameter of which is equal to or smaller than the small diameter of the stepped bores and the large diameter of which is larger than the small diameter of the stepped bores.
  • the locking slide which is complex in terms of its structure and in particular with regard to the initiation of its movements and its handling, can be omitted if the locking element is formed by a ring which is arranged within a cut provided in the hollow pin of the coil capsule and in a radial direction Direction is elastically deformable.
  • the support arms for receiving the coil capsules each have a receiving pin, which are provided in the region of their free end with an incision that the incision on the pin corresponds to the lower capsule, the diameter of the receiving pin corresponding to the diameter of the pin of the lower capsule.
  • each receiving pin is assigned at least one retaining spring which extends parallel thereto and which engages in a slot provided in the coil capsule when pushed onto the receiving pin.
  • FIG. 2 shows a plan view of a lower capsule of a gripper which is formed in the usual way
  • 3a a first embodiment of a bobbin case for use in the device according to the invention in a sectional view with the locking element locked;
  • 3b an end view of the bobbin case according to FIG. 3a; 4a: a sectional view of the bobbin case according to FIG. 3a with unlocked locking element;
  • FIG. 5a a second embodiment of a bobbin case for use in the device according to the invention in a sectional view with the locking element locked;
  • FIG. 5b an end view of the bobbin case according to FIG. 5a;
  • FIG. 6a a sectional view of the bobbin case according to FIG. 5a with the locking element unlocked;
  • FIG. 6b an end view of the bobbin case according to FIG. 6a;
  • FIG. 7a an illustration of the holding elements of a first embodiment of a gripping device in its rest position
  • FIG. 7b an illustration of the holding elements according to FIG. 7a in their operative position
  • FIG. 8b an illustration of the gripping device according to FIG. 8a with fingers in their active position
  • 11a-11b a sectional view and an end view of a receiving space for the bobbin case in the receiving device in the direction of view of the gripper;
  • Figure 12 is an illustration of the cradle for the wearer
  • FIG. 13 shows a schematic illustration of the overall arrangement of the device according to the invention.
  • FIG. 15 a top view of the bobbin case according to FIG. 15;
  • 16a an illustration of the holding elements of a third embodiment of a gripping device in its rest position
  • 16b an illustration of the holding elements according to FIG. 16a in their operative position
  • 17 a detail of the holding elements
  • Fig. 19a-19d a schematic representation of the process of transferring a bobbin case 101 from the gripper to a receiving location on the receiving device.
  • the base plate 1 of a sewing machine is indicated in dash-dot lines, which has a hook 3 rotating around a horizontal axis 2, which in a known manner cooperates with a thread-guiding needle (not shown) to form a seam.
  • FIG. 2 shows an end view of the lower capsule 4, in which the parts thereof relevant to the present invention are shown.
  • the lower capsule 4 has a pin 7 which is arranged coaxially to the axis 2 and which is provided in the area of its free end with an incision 8 which cooperates in a known manner with a blocking element of the bobbin case 5 to be described later.
  • the first embodiment of the bobbin case 5 shown in FIGS. 3 and 4 differs from conventional bobbin cases to the extent that the pivotable flap which is usual there has been eliminated.
  • the bobbin case 11 has a housing 12 which is provided with a hollow pin 13, which in a known manner Includes a coil 6. At the front of the bobbin case
  • a dovetail-like guide is also provided in a known manner for a locking element designed as a locking slide 14, which is arranged to be displaceable transversely to the longitudinal axis of the bobbin case 11.
  • the locking slide 14 is provided with a stop 15 shown in FIGS. 3b and 4b, which acts against a spring 16 arranged in the housing 12 and presses the locking slide 14 relative to FIGS. 3 and 4 to the right. In this position of the locking slide 14 is its right-angled and a hook-shaped nose 17 forming right end outside the bobbin case 11. The coil 6 is thus free.
  • the locking slide 14 also has a recess 18 which is stepped in the region of its left end. In this way, a lock 19 is formed on the locking slide 14, which in plan view has approximately the shape of a crescent, which, when the bobbin case 11 is inserted into the lower capsule 4, projects into the incision 8 in the pin 7 and secures the bobbin case 11 in the axial direction.
  • a gripping device which acts directly on the locking slide 14, serves to move the locking slide 14 from its locking position shown in FIG. 3 into the release position shown in FIG. 4 for the bobbin case 11.
  • 3 and 4- in the left-hand area of the blocking Slider 14 a recess 22 is provided, which is arranged and shaped such that it partially overlaps with the recess 23 already present in the bobbin case 11.
  • a holding element of the gripping device reaching through the two recesses 22 and 23 can therefore come to rest on the right-hand boundary surface of the recess 23 of the bobbin case 11.
  • the recess 22 also has an undercut 24 for a holding element of the gripping device.
  • the bobbin case 11 has a recess 25 in its upper region, the lateral boundary surfaces of which, when the bobbin case 11 is inserted in the lower case 4, interact with the fixing pins 9 of the lower case 9 and the bobbin case 11 in secure radial direction.
  • the flap which has been customary since has also been omitted.
  • the locking slide 14 has also been eliminated and replaced by a locking element formed by a double leg spring.
  • the bobbin case 31 of the second embodiment thus has the above-mentioned double leg spring 32 as a blocking element, one leg 33 of which, in relation to FIG. 5, extends essentially horizontally and lies within the upper guide for the locking slide since then.
  • the free end of this leg 33 initially runs obliquely downward and is angled substantially at right angles to form a nose 34.
  • the nose 34 does not protrude through the recess 20 provided in the housing 12 of the bobbin case 31, so that the bobbin 6 is free.
  • the leg 33 of the double leg spring 32 is connected via a web 35 to the second leg 36 which runs almost parallel to it and which, in the locked position of the bobbin case 31, lies within the incision 8 of the pin 7 of the lower capsule 4, as a result of which the bobbin case 31 is in the axial direction Direction is set.
  • the leg 36 is 5b and 6b - bent back in the form of a loop in its right-hand area, so that its area 37 lies within the lower guide for the locking slide since then.
  • the leg 33 and the region 37 of the leg 36 thus run at almost the same height within the guide for the locking slide 14 since then, while the leg 36 extends somewhat above it. As can be seen from FIGS.
  • the area 37 is bent again at right angles in the horizontal plane and runs below the web 35 almost parallel to this up to the recess 23 of the housing 12 of the bobbin case 31 and is locked there. If the right area of the leg 33 is supported by an element of a gripping device and at the same time the lower leg 36 of the double leg spring 32 is pressed downwards by a further element of the gripping device, then the movement of the, as can be seen from FIGS.
  • FIG. 7a and 7b show a first embodiment of a gripping device 40 according to the invention which interacts with the first embodiment of the bobbin case, namely with the bobbin case 11.
  • the gripping device 40 has two holding elements 41, 42, the holding element 41 being fixedly connected to a slide 43 which is displaceable along a guide track 44 which is parallel to the axis 2 of the gripper 3 and is secured thereon against rotation.
  • the holding element 41 is provided with a holding finger 45 which, in its operative position, comes to rest on a boundary surface of the recess 23 in the housing 12 of the bobbin case 11.
  • the holding element 42 is pivotally mounted on the holding element 41 and has a holding nose 46, which — as seen in the longitudinal direction of the two holding elements 41, 42 — is somewhat behind the holding finger 45 and engages in the undercut 24 of the bobbin case 11 in its operative position.
  • the carriage 43 carrying the two holding elements 41, 42 moved along the guide track 44 by a drive which can be carried by a fixed frame 47 and can be formed as a cylinder or magnet 48.
  • the cylinder / magnet 48 engages via an angle lever 49 mounted on the frame 47, which in turn engages the slide 43 via a pin / slot connection and moves it against the force of a spring 50 to the gripper 3 and thus to the bobbin case 11.
  • the holding element 41 has reached its operative position and lies, protruding through the recess 22 of the locking slide 14, against a boundary surface of the recess 23 provided in the housing 12 of the bobbin case 11.
  • the retaining lug 46 is also located within the recess 22 of the locking slide 14, but not yet in the region of the undercut 24 of the same.
  • the holding lug 46 is guided into the region of the undercut 24.
  • the retaining lug 46 lies against a boundary surface of the recess 22 provided in the locking slide 14 at the same time, so that the locking slide 14 executes a transverse movement, as a result of which on the one hand its bolt 19 is guided out of the incision 8 in the pin 7 of the lower capsule 4 and on the other hand the nose 17 of the locking slide 14 through the 20 recess into the interior of the housing 12 of the bobbin case 11. So that the coil 6 is secured against falling out of the bobbin case 11 at the same time.
  • the retaining finger 45 of the retaining element 41 protrudes through the recess 22 provided in the locking slide 14 into the recess 23 provided in the housing 12 of the bobbin case 11 and bears against a boundary surface thereof the bobbin case 11 is supported against lateral forces during the transverse movement of the locking slide 14; jamming of the bobbin case 11 on the pin 7 is avoided.
  • the locking slide 14 thus captured by the two holding elements 41, 42 remains during the subsequent backward movement of the Gripping device, which is caused by the relaxing spring 50, in this position. In this position, the bobbin case 11 is guided along a path parallel to the axis 2 of the gripper 3 to the change station of the receiving device provided immediately to the side of the gripper 3 and fixed there in a manner to be described later.
  • FIGS. 8a and 8b show a second embodiment of a gripping device 60 according to the invention which interacts with the second embodiment of the bobbin case, namely with the bobbin case 31, the locking element of which is formed by a double leg spring 32.
  • the gripping device 60 has a spreading device 63 comprising two fingers 61, 62, which likewise can be moved from the changing station to the gripper, or from there to, by means of a slide 65 which can be displaced along a guide path parallel to the axis 2 of the gripper 3 Exchange station is movable. Because the drive to achieve this longitudinal movement of the carriage
  • the carriage 65 may be identical to drive the first embodiment of the gripping device, is used below on this drive. Accordingly, the carriage 65 also moves along the guide track 44 and is moved in the manner described above by the cylinder or magnet 48 or by the spring 50.
  • the finger 61 is rigidly attached to the carriage 65 and has a gradation
  • the finger 62 is pivotally mounted on the carriage 65 or on the finger 61.
  • the finger 61 or its gradation 66 acts with the leg 33 of the double leg spring 32.
  • the finger 61 is also provided with an actuating means, which can be formed, for example, by a magnet 67, in order to pivot the finger 62 downward. This pivoting movement can take place against the force of a spring, which is not described in any more detail, and which then returns the finger 62 to its starting position.
  • the finger 62 has a pressure surface 68 which interacts with the leg 36 of the double leg spring 32.
  • a magnet 69 is provided on the slide 65, the armature of which is directed parallel to the guide track 44.
  • the cylinder or magnet 48 moves the slide 65 against the force of the spring 50 to the gripper 3.
  • the finger 31 assumes a position in which the step 66 rests on the underside of the leg 33, the finger 62 is pivoted downward and presses the leg 36 with its pressure surface 68 downward, this moving out of the incision 8 of the pin 7 and thus releasing the bobbin case 31.
  • the force 34 of the pressure surface 68 on the leg 36 moves the nose 34 of the leg 33 to the inside of the bobbin case 31, whereby the nose 34 comes into contact with the flange of the bobbin 6 and thus secures the bobbin 6 against falling out of the bobbin case 31.
  • the armature of the magnet 69 moves against the front of the released bobbin case 31 so that it can be taken along during the subsequent return movement of the carriage 43 and brought to the changing station.
  • the device according to the invention has a receiving device 70 for the bobbin cases, which is equipped with a carrier 71. This is provided with a plurality of receiving spaces 73 for the coil capsules and can be pivoted about an axis 72.
  • the axis 72 can be arranged vertically or horizontally, depending on the space available in the corresponding sewing machine. It is important that the bobbin cases in their changing position assume a position that corresponds to their position in the gripper 3.
  • the receiving locations 73 and their holding means for the coil capsules are arranged or formed in the carrier 71 such that the longitudinal axis of the coil capsules in their changing position is coaxial with the axis 2 of the gripper 3 and the coil capsules in the changing position with respect to their position in the gripper 3 are displaced axially so far that there is at least a minimal distance between the hook 3 and the respective bobbin case or the carrier 71, which does not hinder the normal sewing process.
  • the axis 72 of the receiving device 70 is arranged parallel to the axis 2 of the gripper (3).
  • the receiving device 70 is received by a carriage 74 which does not run along in one is shown in detail frame arranged guide rods slidably arranged in the vertical direction 74. Since the carriage 74 also serves to receive the axis 72, the receiving device 70 can be rotated about the axis 72 and, if the space available in the sewing machine should not be sufficient for this purpose, can be moved up and down in addition to the rotary movement.
  • a magnet 80 which is accommodated by the frame (not shown in more detail) and which acts on the carriage 74 either directly or via a stepping mechanism, is used to drive the carriage 74.
  • the carrier 71 is provided with four support arms 75, which consequently has a total of 4 receiving spaces 73 for the coil capsule.
  • the carrier 71 is pivoted at intervals of 90 degrees around the axis 72, so that each of the receiving places 73 gradually reaches the changing position.
  • the carrier 71 can also have more than four receiving spaces 73 and be clocked accordingly.
  • 9a to 9c and 10a to 10c show different possibilities for the specific design of the receiving locations 73 for the bobbin cases 11.
  • the support arm 75 has a receiving pin 76, the diameter of which corresponds essentially to the diameter of the pin 7 of the lower capsule 4, so that the coil capsule 11 on the receiving pin 76 under the same tolerance conditions as in FIG the lower capsule 4 is received.
  • the receiving pin 76 is provided with an eccentric extension 77 which projects into the recess 18 of the locking slide 14.
  • two pins 78 are provided, which are in a shoulder 79 of the carrier 71 recorded and directed vertically to the axis of the bobbin case 11; their mutual distance corresponds to the mutual distance of the fixing pins 9 of the lower capsule 4.
  • the pins 78 protrude into the recess 25 of the bobbin case 11, so that this is secured in the changing position in the radial direction in the same way as in the lower capsule 4.
  • the support arm 75 is located to the side of the recess 22 of the bobbin case 11, so that the holding elements 41, 42 can pull the bobbin case 11 freely onto the receiving pin 76.
  • the support arm 75 has a receiving pin 81, the diameter of which also essentially corresponds to the diameter of the pin 7 of the lower capsule 4.
  • the receiving pin 81 has an angled web 82 which is directed parallel to the movement path of the slide 43 and has a guide groove 83 for the nose 17 of the bobbin case.
  • the support arm 75 is also located here to the side of the recess 22 of the bobbin case 11, so that the holding elements 41, 42 can pull the bobbin case 11 onto the receiving pin 81 unhindered.
  • a sleeve 84 is arranged on the support arm 75, the inside diameter of which essentially corresponds to the outside diameter of the bobbin case 11.
  • the sleeve 84 is open on its end face facing the gripper 3; on its end face facing away from the gripper 3, the sleeve 84 can be provided with a bottom 85 which serves an opening 86 for the passage of the holding elements 41, 42 of the gripping device 40.
  • the sleeve 84 has on its inside a guide groove 83 for the nose 17 of the locking slide 14.
  • the Locking slide 14 when the gripping device 40 has moved the bobbin case 11 completely into the sleeve 84 and has released the bobbin case 11, is held in its position in which the bobbin 6 is locked. At the same time, the radial position of the bobbin case 11 is secured by the nose 17 projecting into the guide groove 87.
  • FIG. 11a and 11b show an embodiment of the receiving locations 73 for a bobbin case 31 within the receiving device 70.
  • a receiving pin 88 is also provided here, the diameter of which essentially corresponds to the diameter of the pin 7 of the lower capsule 4, so that the coil capsule 31 is received on the receiving pin 88 under the same tolerance conditions as in the lower capsule 4.
  • the receiving pin 88 has a prismatic extension 89, the width of which essentially corresponds to the width of the locking slide 14 of the bobbin case 11.
  • the bobbin case 31 As soon as the bobbin case 31 is pushed onto the receiving pin 88 by the fingers 61, 62 of the gripping device 60, its extension 89 engages in the guide provided in the bobbin case 31 for the locking slide 14; the bobbin case 31 is thereby secured in a radial position. Since the extension 89 prevents the double leg spring 32, which assumes its blocking position, from moving back into its position releasing the coil 6, the nose 34 of the leg 33 also remains in its position, which prevents the coil 6 from falling out of the bobbin case 31.
  • a drive device 90 (FIG. 12) which has a magnet 91.
  • a slide 92 is articulated to the armature of the magnet 91 and can be moved along a guideway formed on the horizontal region of a bracket 93.
  • the guideway can be formed by a slot 94 machined into the bracket 93, into which the lower end of the slide 92 engages.
  • the slide 92 has a driver 95 which interacts with pins 96 of an index disk 97 arranged on the axis 72 carrying the receiving device 70.
  • the magnet 91 leads per switching Step two working strokes against the force of a spring 98 acting on the bracket 93 and on the other end on the slide 92, the index disk 97 after each switching step by a spring-loaded locking ball 99, which engages in corresponding incisions 100 in the index disk 97 the respective position is locked.
  • the situation shown in FIG. 13 is assumed, according to which the four receiving places 73 of the receiving device 70 are each equipped with a bobbin case 11 with filled bobbin 6 and there is no bobbin case 11 in the gripper 3.
  • the locking slides 14 of the bobbin capsules 11 assume their position locking the respective bobbin 6.
  • the receiving device 70 with its carrier 71 is located directly to the side of the gripper 3, the axis of the bobbin case 11 located in the changing position on one of the pins 76, 81 or within a sleeve 84 being aligned with the axis of the gripper 3 and the gripping device 40 is located with its holding elements 41, 42 - based on FIG. 13 - to the left of the carrier 71.
  • This situation occurs when the bobbins 6 of all the bobbin cases 11 have been worked empty by the preceding sewing processes, and the carrier 71 has been filled with four bobbin cases 11 with filled bobbins 6 in a loading point located outside the sewing machine.
  • the carriage 43 is moved to the right on its guide track 44 so that the holding finger 45 of the holding element 41 moves through the recess 22 in the locking slide 14 into the recess 23 of the bobbin case 11.
  • the holding lug 46 reaches the area of the undercut 24 of the locking slide 14.
  • the bobbin case 11 thus captured becomes the corresponding receiving pin 76 or 81 during the further longitudinal movement of the slide 43 Leaving sleeve 84, inserted into the gripper 3 or in its lower capsule 4 and picked up by the pin 7 thereof.
  • the nose 17 of the locking slide 14 is still in its position locking the coil 6; also the Holding lug 46 is still in its position allowing the displacement of the bobbin case 11 on the pin 7, so that the bobbin case 11 can be fully inserted into the gripper 3 or its lower capsule 4 and assumes its sewing position.
  • the holding lug 46 of the holding element 42 is released by the magnet 51, so that it moves out of the undercut 24 in the locking slide 14.
  • the spring 16 arranged in the bobbin case 11 moves the locking slide 14 into its locking position locking the bobbin case 11, the nose 17 of the locking slide 14 simultaneously in its position releasing the coil 6 is moved.
  • the carriage 43 is also moved back into its starting position.
  • the carrier 71 of the receiving device 70 remains in its position until the bobbin
  • the carriage 43 In order to change the bobbin case 11 carrying the empty bobbin, the carriage 43 is moved again to the gripper or to the bobbin case 11.
  • the holding element 41 moves through the recess 22 in the locking slide 14 through into the recess 23 provided in the bottom of the bobbin case 11 and comes to rest on a lateral boundary surface thereof.
  • the magnet 51 pivots the holding element 42, whereby its holding lug 46 is pivoted into the region of the undercut 24 in the locking slide 14. During this pivoting movement, the holding element 42 bears against a lateral boundary surface of the recess 22 and in the process shifts the locking slide 14 into its pin
  • the nose 17 of the locking slide 14 is guided into its locked position for the coil 6 and secures it against falling out of the bobbin case 11.
  • the bobbin case 11 thus captured can empty during the now moving backward movement of the carriage 43 to the one in the changing position Recording place 73 of the carrier 71 are performed. If the carrier 71 or its receiving places 73 are designed to receive the coil capsules 11 in accordance with FIG. 9c and accordingly has a sleeve 84, the holding elements 41, 42 of the gripping device 40 move through the sleeve 84 and thereby move the corresponding coil capsule 11 into the Sleeve 84.
  • the bobbin case 11 carrying the empty bobbin 6 is moved out of the changing position and at the same time a bobbin case 11 carrying a filled bobbin 6 is brought into the changing position.
  • the carrier 71 is exchanged for another carrier 71 equipped with bobbin cases 11 with bobbins 6 filled or outside the sewing machine again with bobbin cases 11 with filled bobbins .
  • a second changing position for the carrier 71 with a gripping device 40, 60 according to the invention.
  • Such a second change position could be arranged immediately after the prescribed change position, so that the bobbin case 11 with an empty bobbin can be replaced immediately after leaving the first change position, then in the second change position by a bobbin case 11 with filled bobbin 6.
  • FIGS. poses A third embodiment of both the bobbin case and a gripping device adapted to it is shown in FIGS. poses.
  • the flap that has been customary since then has been eliminated has been eliminated.
  • the locking slide of the first embodiment has also been omitted and replaced by a locking element which, in contrast to the locking slides of the two above-described embodiments, is arranged inside the bobbin case.
  • the bobbin case 101 shown in FIGS. 14 and 15 has a housing 102 for accommodating a conventional bobbin 6, which is open on its end face facing the usual lower capsule 4 and closed on its side facing away from the lower capsule 4 by a base 103.
  • the outside of the bottom 103 forms the sliding surface for one of the legs of the needle thread loop in the usual way.
  • the housing 102 of the bobbin case 101 has in the usual way a hollow pin 104, the inside diameter of which corresponds to the diameter of the pin 7 of the lower capsule 4.
  • the lower capsule 4 is provided in a known manner with two fixing pins 9 arranged at a distance from one another, which protrude into a recess 10 provided on the periphery of the bobbin case 4 and secure the bobbin case 101 in the radial direction.
  • the lower capsule 4 has a pin 7, which is provided in the area of its free end in the usual way with an incision 8 which interacts with the blocking element 105 of the bobbin case 101.
  • the locking element 105 is ring-shaped and can be formed by an O-ring 106 or by a relatively easily deformable or expandable spring ring 107, which is received in an incision 108 in the hollow pin 104 and whose inner diameter is somewhat smaller than the diameter of the pin 7 .
  • the diameter of the incision 108 is somewhat larger than the outer diameter of the elastic locking element 105 or the O-ring 106 or the spring ring 107. If the bobbin case 101 is pushed over the pin 7 of the lower capsule 4, the locking element 105 is first of all by the pin 7 spread and deformed elastically.
  • the blocking element 105 deforms back into its original position and shape and engages in the incision 8 of the pin 7, so that the bobbin case 101 is secured in the axial direction.
  • a total of 4 stepped bores 109 are provided in the bottom 103, which are directed parallel to the longitudinal axis of the coil 6.
  • the 4 stepped bores 109 are arranged in the corner points of a rectangle or a square for reasons to be explained later.
  • Provided in the housing 102 in the region of the bottom 103 are two slots 110 arranged diametrically opposite one another, into which 6 retaining springs of a gripping device engage when the coil is removed from the coil capsule 101.
  • a bore 111 is provided in the bottom 103, which, when the bobbin case 101 is removed from the lower capsule 4, serves to secure it against rotation.
  • the gripping device 40 described first is used.
  • the parts of the further embodiment of the gripping device 120 which are identical to the parts of the gripping device 40 described above are provided with the same reference numerals as in the gripping device 40.
  • a carrier 121 is fastened to the slide 43, which can be displaced along the guideway 44 (FIGS. 16a, 16b) and serves to receive a total of 4 retaining pins 122.
  • the relative position of the holding pin 122 to one another and to the hollow pin 104 corresponds to the arrangement and relative position of the stepped bores 109 to one another and to the hollow pin 104. This ensures that when the slide 43 moves far enough in the direction of the gripper 3, all four holding pins 122 simultaneously can dip into the four stepped bores 109.
  • the holding pins 122 which in their starting position are oriented essentially parallel to one another, can be pivoted on the carrier 121 about an axis 123, which can be arranged horizontally or vertically.
  • an axis 123 is pivotable, which can be arranged horizontally or vertically.
  • the axes 123 are arranged horizontally, so that the holding pins 122 can be pivoted in a vertical plane.
  • a magnet 125 is assigned to each of the holding pins 122.
  • the magnets 125 are arranged such that the two holding pins 122, which are adjacent to one another within a vertical plane, can be moved away from or towards one another.
  • a holding spring 124 is fastened to the carrier 121, the front end of which is bent.
  • the arrangement of the retaining spring 124 on the carrier 121 is such that when the carriage 43 has moved sufficiently far toward the bobbin case 101 (with reference to FIGS. 16a, 16b), the retaining spring 124 in the lower of the slots 110 the bobbin case 101 engages and secures the bobbin case 101 both against rotation and also prevents the bobbin from falling out of the bobbin case 101.
  • the front ends of the holding pins 122 are each provided with a shoulder 126 (FIG. 17) which has an annular surface serving as a driver 127.
  • the outer diameter of the driver 127 is slightly smaller than the diameter of the stepped bore 109 of the bobbin case 101, so that the projection 126 can be easily inserted into it.
  • the front area thereof is slightly conical.
  • a cone serving as pressure element 128 is provided on the projection 126, the small diameter of which is slightly smaller than the small diameter of the stepped bores 109, so that the pressure element 128 can only be moved slightly into it.
  • FIG. 18 shows a design of the receiving locations 73 of the receiving device 70 that is adapted to the specific design of the bobbin case 101.
  • a mounting pin 130 is provided on the support arm 75, the arrangement of which corresponds to the arrangement of the mounting pins 76, 81 shown in FIGS. 9a and 9b.
  • the receiving pin 130 therefore has a diameter which corresponds to the diameter of the pin 7 of the lower capsule 4.
  • the receiving pin 130 is provided with an incision 131, which in turn corresponds to the incision 8 on the pin 7 of the lower capsule 4.
  • the bobbin case 101 is therefore received on the receiving pin 130 in the same way as on the pin 7 of the lower capsule 4.
  • a holding spring on the support arm 75 to the side or above the receiving pin 130 132 attached the free end of which is slightly bent and, when the bobbin case 101 is pushed onto the receiving pin 130, engages in the upper slot 110 in the housing 102 of the bobbin case 101.
  • the coil 6 is thus also secured against falling out of the bobbin case 101, or the bobbin case 101 against sliding off the receiving pin 130.
  • its free end is provided with a conical extension 133.
  • a pin 134 directed parallel to the receiving pin 130 can be provided on the support arm 75 and engages in the bore 111 provided in the bottom 103 of the coil capsule 101 when the bobbin case 101 is pushed onto the receiving pin 130.
  • FIGS. 19a to 19d To explain the mode of operation of the third embodiment of the bobbin case 101 and the corresponding holding elements, reference is made to FIGS. 19a to 19d. It is assumed that the coil 6 located in the gripper 3 is worked empty, and the receiving pin 130 of the receiving device 70 provided on the support arm 75 is aligned with the axis of the gripper 3 and is free of a bobbin case 101. The gripping device 120 is in its rest position, relative to FIG. 19, to the left of the support arm 75.
  • the carriage 43 is moved past the support arm 75 toward the gripper 3. Take the holding pin 122 their mutually parallel position and are moved by the carriage 43 so far into the stepped bores 109 that the annular surfaces of the drivers 127 are in the area of the enlarged part of the stepped bores 109 (FIG. 19b).
  • the bottom 103 of the bobbin case 101 is now located between the respective driver 127 and the respective pressure element 128 of the holding pins 122.
  • the holding spring 124 extends through the lower slot 110 of the housing 102 of the bobbin case 101 and secures the bobbin 6 during the later axial movement of the Bobbin case 101.
  • the elastic locking element 105 formed by an O-ring 106 or a spring ring 107 is pushed somewhat outwards by the backward movement of the holding pin 122 and thereby comes out of the incision 8 in the pin 7 of the lower capsule 4 Spool capsule 101 thus gripped by the holding pin 122 can be moved out of the lower capsule 4 and pushed onto the receiving pin 130 of the receiving device 70.
  • the elastically deformed locking element 105 then snaps into the incision when it is opposite the incision 131 of the receiving pin 130
  • the bobbin case 101 is secured on the receiving pin 130 in the axial direction in the same way as on the pin 7 of the lower capsule 4. Since the pin provided on the support arm 75 engages in the bore 111 provided in the bottom 103 of the bobbin case 101, the bobbin case 101 is also secured in the radial direction. In addition, the retaining spring provided on the support arm 75 engages
  • the gripping device 120 is brought back into its rest position by its carriage 43, in which both the holding pins 122 and the holding spring 124 are located outside the bobbin case 101.
  • a bobbin case 101 equipped with a filled bobbin 6 is to be moved by the gripping device 120 from the receiving pin 130 into the gripper 3 or its lower capsule 4, the slide 43 first moves the holding pins 122 in their parallel position in the direction of the gripper 3 to the drivers 127 are located within the receiving device 70 in the expanded area of the stepped bores 109 of the bobbin case 101 located on the receiving pin 130. The bottom 103 of the bobbin case 101 is thus again between the drivers 127 and the pressure pieces 128 of the holding pins 122. This situation corresponds to the situation according to FIG. 19c.

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

Abstract

L'invention concerne un dispositif de machines à coudre à point noué 2 fils ou à broder permettant de changer la boîte recevant la canette, cette boîte étant enfichée sur un tourillon placé dans la sous-boîte de la griffe. Ce dispositif comprend un dispositif logement qui présente un support comportant plusieurs logements adjacents destinés aux boîtes de canettes et un dispositif préhenseur destiné à transférer les boîtes contenant des canettes remplies de la position de changement du dispositif logement à la griffe et à transférer les boîtes contenant des canettes vides de la griffe à la position de changement du dispositif logement. La position de changement du dispositif récepteur est située immédiatement sur le côté et sensiblement dans le même axe que la griffe. Le dispositif préhenseur peut être déplacé le long d'un trajet sensiblement parallèle à l'axe de la griffe entre cette dernière et la position de changement du dispositif logement.
PCT/EP2000/002072 1999-03-23 2000-03-13 Dispositif de machine a coudre et a broder permettant de changer la canette du fil de dessous WO2000056969A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000606825A JP2002539867A (ja) 1999-03-23 2000-03-13 ミシンまたは刺繍機における、下糸のためのボビンを交換するための装置
KR1020017012048A KR20020010130A (ko) 1999-03-23 2000-03-13 그립퍼실에 대한 보빈을 교체하기 위한, 재봉 또는편물기상의 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19913043A DE19913043C2 (de) 1999-03-23 1999-03-23 Einrichtung an Näh- oder Stickmaschinen zum Wechseln der Spule für den Greiferfaden
DE19913043.4 1999-03-23

Publications (1)

Publication Number Publication Date
WO2000056969A1 true WO2000056969A1 (fr) 2000-09-28

Family

ID=7902060

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/002072 WO2000056969A1 (fr) 1999-03-23 2000-03-13 Dispositif de machine a coudre et a broder permettant de changer la canette du fil de dessous

Country Status (5)

Country Link
JP (1) JP2002539867A (fr)
KR (1) KR20020010130A (fr)
CN (1) CN1120907C (fr)
DE (1) DE19913043C2 (fr)
WO (1) WO2000056969A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10028231B4 (de) * 2000-05-27 2004-11-04 Philipp Moll Einrichtung an Näh- oder Stickmaschinen zum Wechseln der Spule für den Greiferfaden
DE102004018935B4 (de) * 2004-04-16 2008-01-03 Philipp Moll Einrichtung an Näh- oder Stickmaschinen zum Wechseln der Spule für den Greiferfaden
JP5197197B2 (ja) * 2008-07-04 2013-05-15 Ｊｕｋｉ株式会社 ミシンのボビンケース
CN101525823B (zh) * 2009-03-30 2011-11-09 永嘉县德宝机械有限公司 一种电脑绣花机的智能锁式毛巾刺绣装置
CN102086576B (zh) * 2011-03-25 2013-08-07 佛山市启创科技发展有限公司 电脑绣花机自动换底线装置的梭芯自动供给器
CN103409955B (zh) * 2013-07-19 2015-05-06 上海塔木德刺绣机械有限公司 一种电脑绣花机自动换底线装置
CN103710901B (zh) * 2013-12-25 2017-03-15 苏州市晨彩纺织研发有限公司 缝纫机
CN106480616B (zh) * 2015-08-26 2019-01-15 北京大豪科技股份有限公司 自动换线装置和刺绣机
CN105755691B (zh) * 2016-04-29 2018-08-31 金华高博机械有限公司 一种底线梭子拆装机及拆装方法
CN105755692A (zh) * 2016-04-29 2016-07-13 金华高博机械有限公司 底线梭子拆装机构及拆装方法
CN105734864B (zh) * 2016-05-12 2017-03-08 佛山市启创科技发展有限公司 一种分立式多功能绣花机换底线装置
CN109208196A (zh) * 2017-07-05 2019-01-15 启翔股份有限公司 自动更换梭芯装置
KR102212877B1 (ko) * 2019-05-27 2021-02-05 주식회사 픽스로봇 재봉틀용 보빈 교체 장치

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Publication number Priority date Publication date Assignee Title
US2733676A (en) * 1951-08-09 1956-02-07 Device for automatically exchanging
FR2127695A5 (fr) * 1971-02-23 1972-10-13 Mayer Nathan
JPH08196766A (ja) * 1995-01-31 1996-08-06 Kinoshita Seimitsu Kogyo Kk 下糸自動交換装置
US5718181A (en) * 1995-01-18 1998-02-17 Juki Corporation Bobbin exchanger
US5769016A (en) * 1996-02-09 1998-06-23 Juki Corporation Bobbin exchange judging apparatus

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Publication number Priority date Publication date Assignee Title
TW262494B (fr) * 1993-08-31 1995-11-11 Zyuki Kk

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Publication number Priority date Publication date Assignee Title
US2733676A (en) * 1951-08-09 1956-02-07 Device for automatically exchanging
FR2127695A5 (fr) * 1971-02-23 1972-10-13 Mayer Nathan
US5718181A (en) * 1995-01-18 1998-02-17 Juki Corporation Bobbin exchanger
JPH08196766A (ja) * 1995-01-31 1996-08-06 Kinoshita Seimitsu Kogyo Kk 下糸自動交換装置
US5769016A (en) * 1996-02-09 1998-06-23 Juki Corporation Bobbin exchange judging apparatus

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Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 12 26 December 1996 (1996-12-26) *

Also Published As

Publication number Publication date
JP2002539867A (ja) 2002-11-26
CN1120907C (zh) 2003-09-10
DE19913043C2 (de) 2001-09-27
KR20020010130A (ko) 2002-02-02
CN1344340A (zh) 2002-04-10
DE19913043A1 (de) 2000-10-05

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