EP0638681A1 - Machine à broder à navettes - Google Patents

Machine à broder à navettes Download PDF

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Publication number
EP0638681A1
EP0638681A1 EP94810463A EP94810463A EP0638681A1 EP 0638681 A1 EP0638681 A1 EP 0638681A1 EP 94810463 A EP94810463 A EP 94810463A EP 94810463 A EP94810463 A EP 94810463A EP 0638681 A1 EP0638681 A1 EP 0638681A1
Authority
EP
European Patent Office
Prior art keywords
embroidery machine
machine according
shuttle
driver
nails
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.)
Granted
Application number
EP94810463A
Other languages
German (de)
English (en)
Other versions
EP0638681B1 (fr
Inventor
Franz Lässer
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.)
Franz Laesser AG
Original Assignee
Franz Laesser AG
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Filing date
Publication date
Application filed by Franz Laesser AG filed Critical Franz Laesser AG
Publication of EP0638681A1 publication Critical patent/EP0638681A1/fr
Application granted granted Critical
Publication of EP0638681B1 publication Critical patent/EP0638681B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/16—Arrangements for repeating thread patterns or for changing threads
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/18—Shuttles ; Shuttle holders; Shuttle driving arrangements

Definitions

  • the present invention relates to a shuttle embroidery machine with shuttle running in shuttle tracks and drivable by upper and lower driver nails, in which the shuttle can be shut down by actuating a driver nail (37).
  • a thread clamping and cutting device for the back or under thread of an embroidery machine is disclosed, which is arranged in the region of the tap hole.
  • the clamping gap of the thread clamping device is arranged in alignment with the cutting device.
  • This device is characterized in that an intermediate plate with slot-shaped recesses is mounted on the throat plate, into which a guide part can be inserted.
  • the guide part has an inner recess in which an actuating slide is guided and can be moved back and forth by a sliding drive.
  • the clamping gap is formed by a resiliently mounted clamping finger in the guide part and a counter-clamping piece inserted in the guide part.
  • the thread is first clamped in the clamping gap and then cut during the cutting process.
  • a further advantage is that the thread remains clamped in the clamping gap even after the actuating slide has withdrawn and is only released from the clamping gap by sufficient tension when the stitching is started again. This solution is constructive but rather complex and complex.
  • GB-A-1 063 070 discloses a shuttle embroidery machine in which the driver nails are actuated by means of a slide having a guide track which is displaced on the oscillating bar, also called the driver ruler.
  • the disadvantage of this solution is that the driver nails cannot be operated individually but only as a whole.
  • the actuating member is advantageously formed by at least one switch which can interact with the driving nails.
  • This is an inexpensive solution.
  • only a short time is required for a large number of switching operations, so that the downtime during the closure of the shuttle or during a shuttle change is extremely short.
  • the switch is expediently not arranged on the oscillating beam. Therefore, the weight of the vibrating beam is not increased, and practically the same high embroidery speeds can be achieved as with conventional embroidery machines, which have no actuator.
  • the switch is preferably arranged on a carriage or slide. This enables the switch to be moved very quickly and several switching operations per second can be carried out. This is important because larger shuttle embroidery machines have several hundred embroidery points.
  • the lower driver nail expediently has a switching bolt which projects approximately at right angles and which can be displaced with the switch when it is displaced in the direction of the oscillating beam. This can only be achieved by a slight design change to a conventional driver nail. This has the particular advantage that retrofitting should also be worthwhile for conventional embroidery machines that are already in operation.
  • the switching bolts are each advantageously guided in a connecting piece which has constrictions in order to lock the driver nails. The nozzle can prevent the driver nails from being twisted when moving.
  • a suitable switch has a pivotable wedge. This can be switched each time the car is just between two driver nails.
  • a preferred embodiment has as a switch a pivotable U-profile with tapered jaws and a stationary pulling wedge. This arrangement has the advantage that very short switching times can be achieved with it. As soon as the switching pin of a driver nail to be adjusted has been transferred from the jaw of the U-profile to the pulling wedge, the switch can already be switched again.
  • the slide can expediently be moved by a toothed belt or the like. This is an inexpensive solution, with a toothed belt still having the advantage that the position of the slide can be determined at any time by counting the teeth.
  • the actuating member is formed by at least one actuating member which has connection points for coupling a power means to the driving nails.
  • the actuating member is only used to provide a power means, e.g. electrical power or compressed air.
  • the driver nails can advantageously be actuated by means of compressed air. This has the advantage that no drives for the driving nails are required on the oscillating beam, which would increase the mass of the oscillating beam.
  • the driving nails are expediently arranged to be displaceable in a bore in a block.
  • the rear end of a driver nail can each be designed as a piston, which divides the bore into two cylinder spaces.
  • the cylinder rooms can each be connected via a channel or to the environment. With such a construction, weight can even be saved compared to conventional devices.
  • the actuating member has at least two outlet openings for compressed air, which communicate with the compressed air-actuated driving nails in a specific position of the oscillating beam and can be pressurized with compressed air by a controllable valve.
  • This facility can be built to save space. It is useful if the actuator against the block can be raised. This has the advantage that the oscillating beam does not have to be moved during the actuation of the compressed air-actuated driving nails.
  • At least the driver nails can advantageously be locked in the respective end positions. This can prevent the driver nails from slipping.
  • the driving nails expediently have grooves into which an O-ring engages in the respective end position of a driving nail. This is a cost-effective solution, which has the advantage that the O-ring is not only used for locking but also for sealing.
  • actuators are advantageously provided in a shuttle embroidery machine.
  • a 15 yard shuttle embroidery machine with 520 individual embroidery positions e.g. be equipped with 10 switches.
  • one turnout each switch only 52 driver nails, whereby the individual turnouts can be switched simultaneously.
  • the actuating member is advantageously arranged on parts of the embroidery machine that are not moved during the actual embroidery process. As a result, the mass of the back and forth during embroidery. the oscillating beam moved up and down can be kept small.
  • the carriage or slide can advantageously be moved and positioned by a tooth stand and pinion. This allows quick and precise positioning.
  • FIGS. 1 and 2 show a plurality of shuttle webs 13 projecting upwards and the associated oscillating beam 15, also called a driver ruler, of a shuttle embroidery machine known per se.
  • the shuttle tracks 13 are formed by U-shaped profiles 21 which are delimited on the back by the plates 25 and on the front by the needle plate 23.
  • the shuttle lifts 13 are also commonly referred to as "Stöckli”.
  • the profiles 21 are firmly connected by means of the screws 27, 29 and the connecting plate 31 to the angled support profile 17, the so-called “ruler” (FIG. 2).
  • the oscillating beam 15 moving up and down during operation extends above and parallel to the support profile 17.
  • the boats 33 running in the shuttle tracks 13 are driven by the driver nails 35, 37, which are arranged in the oscillating beam 15 so as to be displaceable transversely thereto.
  • 35 bolts 54 are provided to determine the upper driver nails.
  • a leaf spring 56 is placed over each bolt 54, which is biased with a nut 58 against two upper driver nails 35 and holds them in the respective setting position.
  • the oscillating beam 15 is moved up and down during operation by drive means, not shown. With each embroidery process, the oscillating beam 15 executes a lifting movement, so that the shuttle 33 is passed through a loop of the upper or front thread, which is brought into the shuttle path 13 by means of the embroidery needle through the stitch hole 24 (FIG. 2).
  • the oscillating beam 15 has an essentially rectangular hollow profile 39, on which a guide piece 41 for the lower driving nails 37 is arranged.
  • a plurality of bores 47 arranged at intervals from one another are provided, which serve to receive the lower driver nails 37.
  • the driver nails 37 each have a switching bolt 51 protruding at right angles, which according to a first embodiment of the invention can be actuated by a switch 53 which can be displaced in the direction of the oscillating beam 15.
  • the switching pin 51 mentioned is guided in an elongated hole 43 (FIGS. 5 and 6) which is extended by a connecting piece 45.
  • the socket 45 protrudes into a corresponding recess 49 (FIG. 1) in the supporting profile 17. This allows the switching bolts 51 and.
  • Driving nails through one 15 movable switch 53 can be actuated below the oscillating beam.
  • the switch 53 can be seen in two different positions on its way in the direction of the arrow 60 along the support profile 17, it also being shown how the switching bolts 51 are moved when the switch 53 is displaced around the respective driver nail 37 in to move one position or another.
  • the switch 53 comprises a pivotable U-profile 55 and a stationary pulling wedge 57.
  • a driving nail 37 to be displaced is first moved through one of the two conically tapering jaws 59 along the Schwingbalkens 15 movable switch slightly moved over the central position and by the subsequent pull wedge 57 in the other position.
  • the U-profile 55 is brought into the corresponding position beforehand by a lever 63 connected to it in a rotationally fixed manner.
  • the U-profile 55 and the drawing wedge 57 rest on a slide 61.
  • the slide 61 consists of an angular profile.
  • the connection of the U-profile 55 to the lever 63 takes place via a bolt 65 which is firmly connected to the lever 63.
  • the bolt 65 is mounted in a bore in the slide 61 and passes through the slot-shaped recess 67 of the U-profile 55, which is guided by a Screw nut 69 is firmly connected to the bolt 65.
  • a further lever 64 is articulated on the lever 63 and extends parallel to the slide 61.
  • the switch is operated e.g. by a pneumatic cylinder 66 acting on the lever arrangement 63, 65.
  • the shuttle 33 slides downward in the shuttle tracks 13 and then comes into abutment with an angled spacer 71 attached to the support profile 17 (FIG. 2).
  • the position of the disused shuttle 33 is such that it can be grasped again with little effort by the driver nails 37 which are somewhat rounded on the head side 70.
  • the boats 33 are also rounded on their underside, so that an angle of approximately 45 degrees is formed at the point of contact of the lower driver nail 37 with the boat 33.
  • the outlet opening 72 of the connecting piece 45 which is expediently made of a plastic, is tapered.
  • the constrictions 73 yielding under a force ensure that the driver nails 37 are clamped in the respective end positions and cannot slip during operation of the embroidery machine.
  • the locking of the driver nails 37 in their respective end positions can e.g. also happen through a spring-loaded ball, which can snap into a corresponding recess or groove on the driver nail 37.
  • the device according to the invention functions as follows: When changing color or repeating the oscillating beam 15 is stopped in its lower position.
  • the switching bolts 51 protrude through the recesses 49 of the support profile 17 in the path of the switch 53.
  • the slide 61 is moved in the direction of the arrow 60 (FIG. 1), the switching bolts 51 - depending on the position of the switch 53 - into one or other end position shifted.
  • a control unit controls the movement of the carriage 61 in the direction of the arrow 60 and the switching of the cylinder 66 at the right moment.
  • the switch 53 is pivoted into the desired position between two Driver nails 37 corresponding to an embroidery pattern that was previously loaded into a memory of the control unit.
  • the setting of a driver nail 37 proceeds as follows: When the switch 53 moves forward, the switching pin 51 is initially displaced by the jaw 59 to a little beyond the central position. In this position, the switching pin 51 is then taken over by the subsequent, fixed pull wedge 57 and moved further. As soon as the pulling wedge 57 has taken over the driving nail 37 to be moved, the U-profile 55 can already be brought back into the desired position for the next driving nail 37. For this reason, the switch 53 enables very short switching operations. For a switching process e.g. less than a tenth of a second. Driver nails 37 that are already in the desired position are not captured by the switch 53.
  • the respective position of the carriage 61 along the oscillating beam 15 can be determined by sensors attached at certain points and reported to the control unit. However, it is also possible that when the slide 61 is displaced using a toothed belt or a toothed rack, the position of the slide 61 can be determined by counting the individual teeth, e.g. with the help of a sensor.
  • the driver nails 37 'are actuated by means of compressed air (FIGS. 7 to 9).
  • the compressed air is guided from below by means of a displaceable actuating member 81 to a block 85 arranged on the oscillating beam 15, in which block compressed air-actuated driving nails 37 'are guided in a bore 83.
  • the back end of a driver nail 37 ' is designed as a piston 86, which divides the bore 83 into two cylinder spaces 87, 89. Channels 91, 93 lead to the cylinder spaces 87, 89 through which the compressed air required for actuation can be supplied.
  • the driver nails 37 ' are guided in a fitting part 95 which is inserted into the bore 83 and is fixed to the block 85 by means of a plate 97 or ring.
  • the bore 83 is sealed airtight by the fitting part 95, so that the cylinder spaces 87, 89 are only connected to the environment via the channels 91, 93 (FIG. 7).
  • two annular grooves 101, 103 are provided on the shaft 99 of a driver nail 37 ', which cooperate with an O-ring 105 arranged in the fitting part 95. If the driver nail is in an end position, the O-ring 105 engages in the grooves 101, 103, so that the driver nail 37 'is held in the assumed position even without excess pressure.
  • the locking caused by the O-ring 105 is, however, only so strong that by applying a certain excess pressure to the suitable cylinder space 87 or 89, the corresponding driver nail 37 'can be moved back into the other end position.
  • the O-ring 105 also has a sealing function.
  • compressed air is supplied by means of the actuator 81 (FIGS. 7 and 8), which is connected to a compressed air line 113.
  • the actuating member 81 can be displaced on the support profile 17 by means of a slide 107 and can be positioned such that outlet openings 109, 111 (FIG. 7) provided on the actuating member 81 can communicate with the channels 91, 93 when the driver ruler 15 is lowered and / or the actuating member 81 is raised.
  • the actuating member 81 can be shifted by a shuttle position along the driver ruler 15 by means of devices known per se, for example toothed rack and pinion.
  • compressed air is supplied to the outlet openings via channels (not shown) via a valve 121 arranged on the actuator 81 109.11 headed.
  • the compressed air flows into one or the other cylinder space 87 or 89 and shifts the driver nail 37 'in one direction or the other, so that the shuttle (not shown) is activated or deactivated in three shuttle tracks 13 is stopped.
  • the outlet openings 109, 111 are advantageously dimensioned somewhat larger in diameter than the channels 91, 93. As a result, the positioning of the actuating member 81 can have a certain amount of play. Furthermore, an O-ring (not shown) can be provided at the outlet openings 109, 111 in order to seal the connection point between the actuating member 81 and the block 85.
  • a plurality of actuating members 81 can be arranged on a slide 107 (not shown) formed by a rail.
  • the individual actuators 81 can be connected to one another by a common compressed air line 113. As a result, the times for actuating a large number of driving nails 37 'can be kept short.
  • the actuator 81 is displaced or moved in the vertical position by a certain distance. liftable.
  • the vertical displacement is effected by a piston or cylinder 115, which is connected to the compressed air line 113 via a channel 117.
  • the cylinder 115 moves downward and causes the actuating member 81 resting on the carriage 107 to be lifted (FIGS. 8b and 8a).
  • the actuator 81 is guided vertically on the carriage 107 by means of two guide pins (not shown) which engage in corresponding bores 119 on the actuator 81 (FIG. 7: only one bore is visible).
  • valves 121, 123 are expediently electromagnetic valves.
  • the cylinder 115 is pressed out of the actuating member 81 and thereby causes the same to be lifted.
  • the actuating member 81 is thereby pressed against the block 85 (Fig. 7,8).
  • driver nails 37 'electromagnetically e.g. are designed as anchors, which can be shifted in one direction or the other by sending a current through a coil.
  • Another embodiment provides for the driver nails to be provided with a thread and to be adjusted with a stepper motor.
  • the above-described exemplary embodiments are particularly cost-effective if a plurality of driver nails can be adjusted in each case by a single actuating unit (slide, switch).
  • the mode of operation of exemplary embodiment 2 is as follows: The driving nails 37 'are displaced when the oscillating beam 15 is lowered.
  • the actuating member 81 is positioned such that the outlet openings 109, 111 are located vertically under the openings of the channels 91, 93 of the driver nail 37 'to be actuated.
  • the valve 123 is actuated, whereby the compressed air line 113 is pressurized and the cylinder 115 moves downward.
  • some air briefly flows out of one of the outlet openings 109, 111 depending on the position of the valve 121 (see FIG. 9).
  • the actuating member 81 Since the conductance to the cylinder 115 is expediently dimensioned to be somewhat larger than that to the outlet openings 109, 111, the actuating member 81 is nevertheless raised and pressed against the block 85. The compressed air then flows into one of the two channels 91, 93 and actuates the driver nail 37 '. The compressed air line 113 is then relieved, so that the slide 81 rests on the slide 107 again. The rail 107 is then shifted by one shuttle position and a new actuation process based on the same pattern can begin.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Threshing Machine Elements (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
EP94810463A 1993-08-10 1994-08-09 Machine à broder à navettes Expired - Lifetime EP0638681B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH237193 1993-08-10
CH2371/93 1993-08-10

Publications (2)

Publication Number Publication Date
EP0638681A1 true EP0638681A1 (fr) 1995-02-15
EP0638681B1 EP0638681B1 (fr) 1996-05-01

Family

ID=4232209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810463A Expired - Lifetime EP0638681B1 (fr) 1993-08-10 1994-08-09 Machine à broder à navettes

Country Status (3)

Country Link
EP (1) EP0638681B1 (fr)
AT (1) ATE137539T1 (fr)
DE (1) DE59400249D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1055761A1 (fr) * 1999-05-28 2000-11-29 Franz Lässer AG Machine à broder à navette avec un attelage de support
WO2003078722A1 (fr) * 2002-03-18 2003-09-25 Lässer Ag Procede et dispositif pour entrainer la navette d'une machine a tricoter a navette
EP1595990A1 (fr) * 2004-04-29 2005-11-16 Lässer AG machine à broder à navette
CN1932119B (zh) * 2005-09-14 2013-03-27 拉泽股份公司 用于刺绣镶边的装置和具有这种装置的刺绣机或套口机
KR101299510B1 (ko) * 2011-09-20 2013-08-22 주식회사 미크로 자수기 제어장치 및 그 제어방법

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109112738B (zh) * 2018-07-18 2021-04-30 安徽工程大学 一种自动换针装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1063070A (en) * 1964-11-03 1967-03-30 Saurer Ag Adolph Device for operating slides on a shuttle embroidery frame
CH677805A5 (en) * 1988-03-18 1991-06-28 Laesser Franz Ag Shuttle embroidery machine - has shuttle drive needle which may retract clear of shuttle
EP0541923A1 (fr) * 1991-11-08 1993-05-19 Saurer Sticksysteme Ag Coupe-fil avec pince-fil pour le fil arrière ou le fil du dessous d'une machine à broder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1063070A (en) * 1964-11-03 1967-03-30 Saurer Ag Adolph Device for operating slides on a shuttle embroidery frame
CH677805A5 (en) * 1988-03-18 1991-06-28 Laesser Franz Ag Shuttle embroidery machine - has shuttle drive needle which may retract clear of shuttle
EP0541923A1 (fr) * 1991-11-08 1993-05-19 Saurer Sticksysteme Ag Coupe-fil avec pince-fil pour le fil arrière ou le fil du dessous d'une machine à broder

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1055761A1 (fr) * 1999-05-28 2000-11-29 Franz Lässer AG Machine à broder à navette avec un attelage de support
WO2003078722A1 (fr) * 2002-03-18 2003-09-25 Lässer Ag Procede et dispositif pour entrainer la navette d'une machine a tricoter a navette
CN100379920C (zh) * 2002-03-18 2008-04-09 拉泽股份公司 驱动一梭式绣花机的梭子的方法和装置
EP1595990A1 (fr) * 2004-04-29 2005-11-16 Lässer AG machine à broder à navette
CN1932119B (zh) * 2005-09-14 2013-03-27 拉泽股份公司 用于刺绣镶边的装置和具有这种装置的刺绣机或套口机
KR101299510B1 (ko) * 2011-09-20 2013-08-22 주식회사 미크로 자수기 제어장치 및 그 제어방법

Also Published As

Publication number Publication date
ATE137539T1 (de) 1996-05-15
EP0638681B1 (fr) 1996-05-01
DE59400249D1 (de) 1996-06-05

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