EP0541923A1 - Coupe-fil avec pince-fil pour le fil arrière ou le fil du dessous d'une machine à broder - Google Patents

Coupe-fil avec pince-fil pour le fil arrière ou le fil du dessous d'une machine à broder Download PDF

Info

Publication number
EP0541923A1
EP0541923A1 EP92115468A EP92115468A EP0541923A1 EP 0541923 A1 EP0541923 A1 EP 0541923A1 EP 92115468 A EP92115468 A EP 92115468A EP 92115468 A EP92115468 A EP 92115468A EP 0541923 A1 EP0541923 A1 EP 0541923A1
Authority
EP
European Patent Office
Prior art keywords
thread
cutting
clamping
plate
shuttle
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
EP92115468A
Other languages
German (de)
English (en)
Other versions
EP0541923B1 (fr
Inventor
Jürg Dr. Henz
Max Schreiber
Armin Kobler
Karl-Wolfgang Wiest
Livio Selm
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.)
OC Oerlikon Textile Holding AG
Original Assignee
Saurer Sticksysteme AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE9113900U external-priority patent/DE9113900U1/de
Application filed by Saurer Sticksysteme AG filed Critical Saurer Sticksysteme AG
Publication of EP0541923A1 publication Critical patent/EP0541923A1/fr
Application granted granted Critical
Publication of EP0541923B1 publication Critical patent/EP0541923B1/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
    • D05C11/20—Arrangements for cutting the needle or lower threads

Definitions

  • the present invention relates to a thread clamping and cutting device according to the preamble of claim 1.
  • a thread clamping and cutting device according to the preamble of claim 1.
  • Such a device has become known, for example, from the subject of DE 20 65 264.
  • a shuttle is slidably mounted in a shuttle guide and the thread clamping and cutting device is driven displaceably via a rotary mechanism, the direction of displacement of the clamping and cutting device extending perpendicular to the direction of transport of the shuttle.
  • each thread clamping and cutting device must be assigned its own movement drive in order to ensure separate control at all.
  • this has the disadvantage that a relatively large space requirement for the separate drive is required per clamping and cutting device.
  • Such an arrangement cannot be used in the conventional shuttle embroidery machine with 4/4 repeat due to the limited space requirement.
  • Another disadvantage of the known cutting and clamping device is that the length of the cut thread is relatively large. This will affect the embroidery on the back of the fabric and will result in high thread consumption.
  • Another disadvantage of the known arrangement is that the known clamping and Cutting device is arranged in the area of the shuttle guide, and therefore there is a risk that the thread path of the rear or lower thread is impaired, especially since the known clamping and cutting device penetrates the shuttle carrier.
  • Characteristic of this known embodiment is, moreover, that the cutting knife itself initiates the clamping process and that the clamping of the rear or lower thread depends directly on the cutting process itself. This means that after the rear or lower thread has been cut off, it is clamped between a clamping surface of a leaf spring and the cutting knife itself.
  • this has the disadvantage that - if a new cutting process is required - the clamping is then released and the cut back or bobbin thread is released.
  • the cut-back and free-hanging rear or lower thread then runs up and down with the shuttle and is crushed, which can lead to a thread break when the embroidery site is stitched on again, or fallen stitches occur.
  • the present invention is therefore based on the object of further developing an embroidery machine with thread clamping and cutting device of the type mentioned in such a way that, in the case of an embroidery point circuit introduced manually or mechanically on the needle side, the rubbing of the idling rear or lower thread on the shuttle side is avoided with certainty.
  • the technical teaching of claim 1 serves to solve the problem.
  • An essential feature of the present invention is that it is clamped independently of a cutting process of the rear or lower thread.
  • the clamping is independent of the movement of the cutting knife of the cutting device.
  • the cutting knife was at the same time a clamping element, as a result of which the above-described disadvantage of the exposed rear or lower thread was created.
  • the rear or lower thread is then released from this clamping by a corresponding pull on the rear or lower thread, when the back or lower thread is tied into the front thread when the corresponding embroidery site is sewn on again and the pull on the rear or lower thread is so strong is that it is pulled out of the nip according to the invention.
  • Another important advantage of the present invention is that there is only a very small space requirement for the cutting and clamping device on the shuttle side, because there is no longer a separate movement drive for each cutting and clamping device, as in DE 20 65 264, but according to the present innovation, all cutting and clamping devices are operated simultaneously and simultaneously via a common actuating rail.
  • the present invention comprises two different embodiments, both of which are intended to be encompassed by the present inventive concept.
  • the cutting knife itself is provided as an actuating element for initiating the clamping. I.e. the cutting knife brings the cut back or under thread into the clamping device according to the invention and leaves it there. This means that when the cutting knife is retracted again, the rear or lower thread remains in the clamping device without being able to be released from this clamping device by a retracting movement of the cutting knife, as is disadvantageously the case in DE 20 65 264.
  • the clamping process to be initiated independently of the cutting process is initiated by a separate actuating element, this actuating element being able to be moved independently of the cutting knife.
  • This actuating element thus grips the cut back or under thread and brings it into a corresponding clamping device, where it is held.
  • Another important advantage of the invention is that the cutting movement takes place parallel to the shuttle movement, which results in a small space requirement.
  • the DE-PS 20 65 264 arranged perpendicular to the shuttle carrier motion drives for the cutting and clamping mechanism takes up a lot of space, which is not necessary in the present innovation, because with the present innovation, the cutting and clamping mechanism is integrated in the tap hole plate which is connected to the shuttle.
  • the clamping device is arranged in the immediate vicinity of the cutting device, and that the cutting edge of the cutting device is approximately aligned with a part of the clamping device. This ensures that the thread is clamped and cut at the shortest possible distance.
  • the thread cutting and clamping device according to the invention is approximately flush with the stitch hole in the throat plate, which also ensures that the cut back or bobbin thread is only a short length. This ensures that the remainder of the rear or lower thread remaining on the fabric is very short.
  • the result is Significant advantage that a drive part on the throat plate, which drive part takes over the movement drive for the thread clamping and cutting device, can be accessed with an external drive while taking up a small amount of space.
  • the thread clamping device is fixed and the cutting knife is movably guided in the throat plate. Both parts are mounted in a corresponding sliding guide of the throat plate and can be pulled out as a whole part from this throat plate guide and replaced.
  • the throat plate is a plate-shaped part.
  • Each stitch plate extends over several embroidery sites, e.g. over four embroidery points, and forms the shuttle guides 6, 6a, 6b for one shuttle 3 each.
  • the shuttle guides 6, 6a, 6b are thus formed on the throat plate 2 in the form of semi-open channels, in the area of which the respective shuttle 3 is moved by means of a displacement drive, not shown.
  • the shuttle guides 6, 6a, 6b are in arranged obliquely on the throat plate 2 and the respective shuttle 3 is displaceably driven in the direction of arrow 4 in the shuttle guides 6,6a, 6b.
  • An intermediate plate 37 according to FIG. 4 is fastened on the throat plate 2, in which recesses 13 are provided for a plurality of guide parts 11.
  • the guide parts 11 are preferably designed as plastic parts and are detachably and removably held in these recesses 13.
  • the recesses 13 are designed as slot-shaped recesses which are open on one side and into which opening on one side the guide part 11 made of plastic can be inserted.
  • Figure 1 it is shown that the plastic part 11 is held with a latching bracket 14 in the intermediate plate 37 and in the needle plate 2.
  • the entire guide part 11, preferably made of plastic, can thus be pulled out of the intermediate plate in a particularly simple manner.
  • the guide part 11 has an inner recess 21 in which an actuating slide 18 is slidably guided.
  • the type of actuating slide is shown in more detail in Figure 1 and in Figure 2 on the right side.
  • the actuating slide 18 essentially consists of an actuating rod 26, which has an extension 8 at its lower end, opposite to which an extension 7 arranged on the guide part 11 is located.
  • a spring 9 is provided between the two approaches. The force of the spring 9 thus holds the actuating slide 18 in a lower, lowered position, which is shown in FIG. 1.
  • the displacement drive for the actuating rod 26 and thus for the entire actuating slide 18 is effected by a cylinder 34 which acts via a piston rod 33 on a pivot point 32 which is arranged in the region of a pivoted lever 31.
  • the lever 31 is rotatably connected to a shaft 30, the length of the shaft extending over a certain number of embroidery points.
  • the actuating slide 18 is connected to the actuating rod 26 by means of screws 27.
  • the actuating slide 18 consists essentially of a U-shaped part which, according to FIGS. 5 to 8, essentially consists of a front plate 19 and a rear plate 20. Both plates 19, 20 form a mutual distance and thus a recess 21 into which the guide part 11 engages with a corresponding extension 12. This ensures that the actuating slide 18 is guided in a straight line in the region of the guide part 11.
  • a keyhole-shaped recess 22 is machined, which essentially consists of a bore 23 which merges into an elongated hole 24 in its upper part.
  • the lower edge of the bore 23 is designed as a cutting edge 25, it being sufficient that only the left area according to FIG. 6 has a cutting effect, while the remaining, rounded area of the cutting edge 25 does not have a cutting effect and is designed to be gentle on the thread .
  • the bore 23 of the actuating slide 18 lies exactly flush with the stitch hole 15 machined in the throat plate.
  • a thread clamping device 16 is formed here, which essentially consists of a clamping gap 17.
  • This clamping gap is formed by a clamping finger 38, which is resiliently mounted on one side in the guide part 11 and is preferably formed in one piece from the plastic with the guide part 11 and, on the other hand, the clamping gap 17 is formed by a counter-clamping piece 40 which is inserted into the guide part 11. This inserted part (counter clamping piece 40) can be seen in FIG. 1.
  • clamping gap 17 is in the direction of movement of the actuating slide (i.e. in the longitudinal direction of the shuttle guide - arrow direction 4) and that the clamping gap 17 forms an extension upward from the tap hole 15.
  • the counter knife 39 according to FIG. 3 is designed as an approximately C-shaped metal part, the two of which lateral legs 43 are clipped onto the lateral surfaces of the guide part 11.
  • This special C-shaped design and the clipping of obliquely inwardly directed legs 43 has the advantage that the front surface 44 of the knife bulges inwards and thus adapt to the limits of the holes for the tap hole 15 and fit snugly. This ensures that the cutting front surface 44 of the counter knife 39 fits snugly and positively against the hole 23 of the front plate 19.
  • a clamping and cutting process according to the present innovation is described in more detail below.
  • the rear or lower thread 10 is pulled out of the thread hole 5 of the boat 3 and runs through the stitch hole 15 in the position shown.
  • the cylinder 34 is actuated, so that the piston rod is pivoted suddenly into its position 31 'by the lever 31.
  • the actuating rod 26 is lifted upward and the actuating slide 18 with its two plates 19, 20 is displaced upward, the shoulder 12 immersing more strongly in the recess 21 in the guide part 11.
  • the thread 10 to be cut comes to rest on the movable cutting edge 25 in the region of the lower edge of the bore 23 and is then cut off as soon as the thread is in juxtaposition with the upper cutting edge 42 of the fixed counter knife 39. It is important here that with this feed movement of the actuating slide 18 in the direction of arrow 4 upwards the thread is already in the area of the clamping gap 17 and is already cut there during the clamping.
  • the actuating slide 18 continues to move upward in the direction of arrow 4, as a result of which the cut end of the thread reaches the upper region of the elongated hole 24 in the region of the keyhole-shaped recess 22 and remains in the clamping gap 17.
  • the entire actuating slide 18 is covered and closed on all sides in the guide part 11, which guide part 11 is in turn held in the shuttle plate in the throat plate 2 and in the intermediate plate 37.
  • the entire thread clamping device 16 is thus protected against contamination.
  • Another important advantage of the present invention is that the entire actuating slide 18 is integrated with its actuating rod 26 in the throat plate 2 or in the intermediate plate 37 connected to the throat plate, which results in a compact, space-saving construction, in particular because the entire displacement movement in the plane of the stitch plate 2.
  • the advantage of the present invention is therefore that an embroidery machine that can be switched off at a particular point can now be operated in a particularly advantageous manner.
  • the boats no longer need to be stopped to avoid the previously undesirable ones Avoid rubbing the rear or lower thread.
  • the essence of the invention lies in the fact that a thread clamping and cutting device is arranged in the region of the tap hole, a clamping gap 17 of a thread clamping device 16 being arranged in the extension of the cutting direction for the cutting knife, so that the thread previously clamped by the cutting device and subsequently cut off is then cut is detected and fixed in the clamping gap 17 lying behind in the cutting direction.
  • the cutting device to be cut Thread is first transported in a nip 17 without cutting and only cuts there and that after cutting off, the cut back or under thread in the nip 17 is conveyed further upwards to finally fix this thread.
  • the cutting device is displaceably guided in the region of a guide part 11 made of plastic, and essentially consists of a front plate and a rear plate, with a keyhole-shaped recess 22 with a bore 23 in each of the two plates 19, 20 and an elongated hole 24.
  • FIG. 2 shows a boat guide, various parts being covered for the sake of clarity.
  • the middle part of Figure 2 shows all parts of a finished shuttle guide with thread clamping and cutting device integrated therein.
  • FIG. 2 shows the thread and clamping device according to the invention, the front wall of the shuttle guide being removed and the left part of FIG. 2 showing the clamping device according to the invention, with the actuating slide 18 being removed.
  • the alignment of the keyhole-shaped recess 22 in alignment over the clamping gap 17 results in the advantage of better thread guidance into the clamping gap 17.
  • the keyhole-shaped recess 22 in the front plate 19 and in the rear plate 20 is therefore not necessary for a solution; it is only important that the keyhole-shaped recess 22 lying clamping gap 17 is sufficiently long so that the thread is clamped in the front region of the clamping gap and then cut and then transported further back into the clamping gap 17 by the cutting device.
  • the elongated hole 24 in the region of the keyhole-shaped recess 22 in the region of the front plate serves to prevent the cut thread 10 from being pushed out of the clamping gap 17 when the actuating slide 18 runs back.
  • the elongated hole 24 in the region of the recess 22 in the region of the rear plate 20 serves the same purpose.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP92115468A 1991-11-08 1992-09-10 Coupe-fil avec pince-fil pour le fil arrière ou le fil du dessous d'une machine à broder Expired - Lifetime EP0541923B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9113900U 1991-11-08
DE9113900U DE9113900U1 (de) 1991-11-08 1991-11-08 Fadenklemm- und Schneideeinrichtung für den Hinter- oder Unterfaden einer Stickmaschine
DE4202891A DE4202891A1 (de) 1991-11-08 1992-02-01 Fadenklemm- und schneideinrichtung fuer den hinten- oder unterfaden einer stickmaschine
DE4202891 1992-02-01

Publications (2)

Publication Number Publication Date
EP0541923A1 true EP0541923A1 (fr) 1993-05-19
EP0541923B1 EP0541923B1 (fr) 1995-12-27

Family

ID=25911440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92115468A Expired - Lifetime EP0541923B1 (fr) 1991-11-08 1992-09-10 Coupe-fil avec pince-fil pour le fil arrière ou le fil du dessous d'une machine à broder

Country Status (6)

Country Link
US (1) US5383416A (fr)
EP (1) EP0541923B1 (fr)
JP (1) JPH05239758A (fr)
KR (1) KR960015666B1 (fr)
AT (1) ATE132214T1 (fr)
DE (2) DE4202891A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638681A1 (fr) * 1993-08-10 1995-02-15 Franz Lässer AG Machine à broder à navettes
EP0638682A1 (fr) * 1993-08-10 1995-02-15 Franz Lässer AG Machine à broder à navettes avec un dispositif coupe-fil

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4300846A1 (de) * 1993-01-15 1994-07-21 Saurer Sticksysteme Ag Arbon Schneide- und Klemmeinrichtung für Vordergarn für Stickmaschinen
DE4316916C2 (de) * 1993-05-20 1996-07-04 Saurer Sticksysteme Ag Selbstreinigende Fadenklemme
KR100469403B1 (ko) * 1997-03-17 2005-05-19 엘지전자 주식회사 선택접속이가능한내선접속장치
JP4530526B2 (ja) * 2000-12-07 2010-08-25 Ｊｕｋｉ株式会社 糸切り装置
ATE391801T1 (de) * 2003-03-21 2008-04-15 Laesser Franz Ag Vorrichtung zum schneiden der hinterfäden bei schiffchenstickmaschinen
CN113322593A (zh) * 2021-04-27 2021-08-31 浙江镨美科智能刺绣设备有限公司 一种刺绣机剪线装置及刺绣机剪线方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE226828C (fr) *
US1613634A (en) * 1925-05-04 1927-01-11 Singer Mfg Co Thread-cutting mechanism for sewing machines
US1816308A (en) * 1929-10-19 1931-07-28 Singer Mfg Co Thread-cutting mechanism for sewing machines
DE2065264A1 (de) * 1970-04-10 1973-02-01 Rudolf Reich Fadenfang- und schneidvorrichtung fuer den schiffchenfaden bei schiffchen-stickmaschinen
DE3023159A1 (de) * 1979-06-29 1981-01-08 August Heinzle Stickmaschine

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US2345943A (en) * 1942-09-03 1944-04-04 Singer Mfg Co Article attaching machine
NL262626A (fr) * 1960-04-04
DE1485498C3 (de) * 1965-11-06 1974-09-12 Rudolf 5450 Neuwied Reich Schneidvorrichtung für die Schiffchenfäden an Stickmaschinen
US3701329A (en) * 1971-01-04 1972-10-31 Honeywell Inf Systems Stitch control mechanisms and thread cutter
US3760749A (en) * 1971-09-07 1973-09-25 L Trageser Mechanism for simultaneously cutting tensioned bobbin threads as all the needle heads of an automatic embroidering machine
IT967766B (it) * 1972-09-22 1974-03-11 Metalmeccanica Spa Dispositivo di taglio dei fili dal lato delle navette in macchine da ricamo
DE2344720C3 (de) * 1973-09-05 1981-04-09 Pfaff Industriemaschinen GmbH, 6750 Kaiserlautern Einrichtung an Stickmaschinen zum Klemmen und Schneiden des Nadelfadens
CA1058453A (fr) * 1976-10-06 1979-07-17 Paul E. Steckenrider Coupe-fil automatique pour machines a coudre
DE3124795C1 (de) * 1981-06-24 1982-11-04 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Fadenabschneidvorrichtung fuer Zickzack-Naehmaschinen
DE3133333C2 (de) * 1981-08-22 1986-08-14 Aktiengesellschaft Adolph Saurer, Arbon Schiffchenstickmaschine
DE3239130A1 (de) * 1982-10-22 1984-04-26 Arthur Schmid AG, 8590 Romanshorn Faden-abschneidevorrichtung
DE8329216U1 (de) * 1983-10-10 1984-01-05 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Fadenwaechter fuer naeh-, stick- und tuftingmaschinen o. dgl
US4834009A (en) * 1985-05-31 1989-05-30 Union Special Corporation Sleeve backtack
CH673042A5 (fr) * 1986-11-06 1990-01-31 Saurer Ag Adolph
JPH0616619Y2 (ja) * 1989-04-19 1994-05-02 ジューキ株式会社 ミシンの糸切断装置
FR2665192B1 (fr) * 1990-07-26 1992-11-27 Sotexi Ste Textile Ind Dispositif coupe-fils pour machines a coudre multi-aiguilles.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE226828C (fr) *
US1613634A (en) * 1925-05-04 1927-01-11 Singer Mfg Co Thread-cutting mechanism for sewing machines
US1816308A (en) * 1929-10-19 1931-07-28 Singer Mfg Co Thread-cutting mechanism for sewing machines
DE2065264A1 (de) * 1970-04-10 1973-02-01 Rudolf Reich Fadenfang- und schneidvorrichtung fuer den schiffchenfaden bei schiffchen-stickmaschinen
DE3023159A1 (de) * 1979-06-29 1981-01-08 August Heinzle Stickmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638681A1 (fr) * 1993-08-10 1995-02-15 Franz Lässer AG Machine à broder à navettes
EP0638682A1 (fr) * 1993-08-10 1995-02-15 Franz Lässer AG Machine à broder à navettes avec un dispositif coupe-fil

Also Published As

Publication number Publication date
KR930010276A (ko) 1993-06-22
ATE132214T1 (de) 1996-01-15
DE4202891A1 (de) 1993-05-19
KR960015666B1 (ko) 1996-11-20
JPH05239758A (ja) 1993-09-17
US5383416A (en) 1995-01-24
DE59204832D1 (de) 1996-02-08
EP0541923B1 (fr) 1995-12-27

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