EP2351881A1 - Multi-head embroidery machine - Google Patents

Abstract

The machine has an embroidery head arranged to a carrier (71), and exhibiting needle sets (63), which are adjustably arranged in a shifting direction along the carrier. A needle (69) is arranged at a needle tappet, and back and forth movable by a needle drive unit in a direction. A bottom thread unit is assigned to the embroidery head. A transmission is arranged at a rack for synchronous movement of stitch forming organs of an upper thread unit and the bottom thread unit. Material pusher units are provided with axially movable material pushers (13) in a distance to the needle at the rack.

Description

The present invention relates to a multi-head embroidery machine according to the preamble of claim 1.

According to the book " Embroidery Techniques "by Friedrich Schöner and Klaus Freier (VEB book publisher Leipzig, 1982, 1st edition ) The embroidery machines can be subdivided according to different aspects: A first type of classification is based on the number of thread systems involved in the embroidery process: In some machines, the embroidery is produced only by a thread system, other machines require two thread systems, namely in addition a second sub, Hind, spool, shuttle or bobbin thread.

A second type of classification is based on the number of needles working at the same time: The one-needle embroidery machines include the Singer, Eagle and Crank embroidery machines. Multi-needle or rapport embroidery machines are shuttle embroidery machines and the hand embroidery machine.

In addition to these two groups, there is still the multi-head embroidery machine, which can be assigned to neither of the above two groups. The principle of this machine is based on the fact that mounted on a large table top 3, 4, 6, 10 or 12 Singer embroidery machine heads, which are set by a common drive shaft in motion. The synchronization of the heads thus achieved is necessary so that all needles simultaneously pierce or are out of the embroidery ground. In this case, the embroidery bottom can be clamped individually for each head in an embroidery hoop. These hoops are fastened by means of screw connections to a gate-like structure, which is controlled by a small automaton in the horizontal plane. For an embroidery machine with 6 heads, the embroidery field is approx. 240 x 200 mm. The stitch formation organs and the stitch formation process are identical to those of the Singer embroidery machine. The only difference to these is that on each needle still a presser is provided which holds the embroidery bottom during stitch formation. The presser foot is raised whenever the hoop moves. In addition, individual embroidery heads are usually equipped with a thread monitor system, which automatically shuts off the machine when the thread breaks.

The first multi-head embroidery machines were offered 100 years ago by the German Singer Nähmaschinen factory (see " The Art Of Embroidery, Coleman, Schneider, 1991 ). The first automatic multi-head embroidery machine was launched on the market in 1927 (also known as the "Würker Automat"). Technology and Product Theory, Klaus Freier, VEB book publisher, Leipzig, pages 130 to 131 ) Directed.

The present invention relates to the aforementioned multi-head embroidery sewing machines in which each embroidery head is provided with a plurality of needle locations. Hereinafter, these multi-head embroidery sewing machines are also referred to as multi-head multi-needle embroidery machines in the description for ease of distinction. As a rule, each needle point comprises a thread monitor (optional), a thread guide (also referred to in the literature as thread take-up lever), thread guide devices, including stitch-compensating thread tension parts, for the upper thread and a needle arranged on a needle plunger which moved up and down and from a drive unit is driven. The aforementioned stitch-forming components are also referred to in the present description as an upper thread unit. The embroidery heads of the multi-head embroidery machines are mounted laterally displaceable on a support arm. Below each embroidery head is a throat plate in which a needle hole is provided for the needle and which defines the embroidery point locally. Each needle of an embroidery head is displaceable laterally to the mentioned embroidery point, on which the embroidered embroidery material spanned in a clamping frame which can be displaced in the x- and y-direction during operation rests. The needle, which is located at the embroidery site, penetrates through the embroidery material and into the needle hole during the movement of the needle. In this case, the upper thread is passed through the embroidery material and formed by a corresponding needle movement, a loop on the back of the embroidery material. Through this loop then the lower thread is guided. When retracting the needle, the upper thread is tightened and formed in the embroidery a so-called stitch. When embroidering only one of the needle points is active, namely the one which is located at the embroidery point. The embroidery heads of the mentioned multi-head embroidery machines are arranged in a known manner in a specific Rapportverhältnis along the support arm.

A characteristic of these multi-head multi-needle embroidery sewing machines is therefore that there are a plurality of needle locations per embroidery head. This has the advantage that each Needle point can be equipped with a different thread and therefore buntings can be performed by always only the corresponding needle is put into action.

The needle plunger and their associated thread levers of a group of needles are usually stored in a needle housing that brings the selected needle plunger and the associated thread lever before a stationary mounted drive for the purpose of changing the thread by moving.

A conventional multi-head multi-needle embroidery sewing machine is exemplary in the FIGS. 1 and 2 shown. This comprises a frame 201, an embroidery table 203 arranged on the frame 201 and a plurality of embroidery heads 205 arranged in series above the embroidery table FIG. 2 it can be seen, each embroidery head 205 has a plurality of needle points equipped with a needle 215 each. Each needle point includes stationary thread guide elements 207 or thread brakes, an up and down movable thread receiving lever resp. Thread guide 209, Fadenumlenkteile 211 and one on a needle cancer 213 with needle tappet 214 arranged needle 215. As out FIG. 2 Further, each needle plunger 214 is equipped with a presser 217. Below the embroidery heads 205 hoop 219 are provided, in which a embroidery ground to be embroidered is aufspannbar. The embroidery frames 219 can be inserted into a large clamping frame 221 which extends across the width of the embroidery table 203. The clamping frame 221 is displaceable in a known manner in the x and y directions. As already mentioned above, the embroidery heads are arranged on a linear guide 223 and displaceable along it in the x-direction.

A disadvantage of the known multi-head embroidery sewing machines is that the presser footprints are arranged directly on the needle plunger and thus coupled to the movement of the needle plunger. Another disadvantage is that a separate presser footer is required for each needle.

In the US 2007/0261621 discloses a multi-head embroidery machine, in which only one presser foot is provided per embroidery head. The presser foot, the needle bar and the large thread guide are each driven by separate motors. One The purpose of the motor is to move the needle bar housing laterally along a guide rail, in order in each case to couple a specific point of the needle to the drive.

The Stoffdrückfuss is disposed on a rod which is guided vertically movable by a guide member. On this rod, two position members are fixed in a middle section at a distance from each other. Between these position links is a link which is rotatably mounted on the rod. The link is connected via a connecting arm and a drive lever to the shaft of the presser foot drive motor. On one of the position members, a roller is arranged, which engages in a guide groove of the guide member. The guide groove has an upper and a lower straight guide portion, which are interconnected via an inclined guide portion. In sewing mode, the roller in the lower guide section moves up and down synchronously with the needle drive. In this case, a needle hole of Stoffdrückfusses exactly above the needle hole of a needle plate.

For the needle change, the drive shaft of the drive motor is rotated so far that the roller is moved over the oblique guide section to the end of the upper guide section. In this case, the rod rotates, on which the presser foot is arranged, so that the needle hole of the presser foot is spaced from the needle hole of the throat plate.

The German patent application DE-OS-10 2008 004855 discloses a device for lifting the presser foot of a multi-head embroidery machine. In this case, the device comprises a driving cam arranged on a drive cam, which cooperates with a transmission element for generating a vibrating movement of the latter. The transmission element is articulated at a first end of a drive lever, which is rotatable about a pivot point. The second end of the drive lever is articulated on a drive block, which is guided vertically movably along a guide rod. The drive block carries a connection holder which interacts with a drive holder in a form-fitting manner. The drive holder is guided axially movably on a needle plunger. On the drive holder, a presser foot drive shaft is arranged parallel and at a small distance from the needle bar guide shaft. In addition, there is also a presser foot height adjuster for moving the pivot point of the presser foot drive lever. This makes it possible to adjust the height of the presser foot.

As in particular from the DE-OS-10 2008 012 846 , which is a further development of the embroidery machine DE-OS-10 2008 004855 can be taken, is provided between the drive block and the connection holder, a spring which biases the connection holder down. As a result, the contact pressure of the presser foot on the throat plate can be limited. The embodiment of the DE-OS-10 2008 012 846 is further characterized in that both the needle bar and the Stoffdrückerfuss be operated by an individual drive mechanism. This has the advantage that the movement path of the presser foot can be generated freely and thus the stroke or the lower end point of the presser foot can be generated freely. The disadvantage, on the other hand, is that it requires a complex control in order to synchronize the individual drives. Yet another disadvantage is that a number of motors corresponding to the number of pin locations is required for each pin location. This makes the embroidery machine described not only expensive, but also prone to repairs.

Object of the present invention is to propose a multi-head embroidery needle sewing machine, which does not have certain of the aforementioned disadvantages. In particular, an object is to provide a multi-head multi-needle embroidery sewing machine, which is characterized by a higher efficiency compared to conventional machines. The aim is to provide a machine in which the presser foot is independent of the movement of the needle tappet movable. Another goal is to propose an embroidery machine whose drive is robust and inexpensive to produce.

The present invention relates to a multi-head embroidery machine. This has at least one embroidery head, which has a plurality of needle locations. The needle points are arranged relative to an embroidery point in the x-direction, ie laterally displaceable on a support. Each needle point comprises organs, such as thread guides, thread guiding devices, and a needle plunger, to each of which a needle can be fastened. The needle plungers can be moved back and forth in the z-direction. The aforementioned organs are collectively referred to as upper thread unit. Each embroidery head is assigned a lower thread unit. Between the upper thread unit and the lower thread unit, a clamping frame for clamping an embroidery material is arranged. The clamping frame has two in the y-direction spaced from each other first and second fabric holding elements. As is well known, multi-head embroidery machines have a gearbox, eg with a central drive shaft, for synchronously driving the upper and lower thread units.

According to the invention the problem is solved in an embroidery machine according to the preamble of claim 1, characterized in that the gearbox of the presser units are driven by a common presser-drive shaft. This has the advantage that a synchronization with the needle movement is possible. The fact that no individual motors are used, the drive can be produced inexpensively. In this case, the engine of the main drive shaft of the embroidery machine can be used to drive the presser-drive shaft by the main drive shaft is coupled to the fabric presser drive shaft. The main drive shaft and the presser drive shaft preferably extend over the entire length of the embroidery machine.

Advantageously, the same drive shaft is used for driving the needle tappet and the fabric presser and preferably the large thread guide. In this way, the manufacturing costs can be further reduced. For the drive of the needle punch and for the large thread guide, a gear can be used, as described below for the presser foot.

Advantageously, the axially movable presser foot is arranged at a distance from a needle fastened to the needle tappet. In contrast to the prior art, the fabric presser is thus no longer located directly on the needle plunger, but defined as a separately driven unit that can be completely separate from the needle drive in a multi-needle embroidery machine. This has the big advantage that only one fabric presser per embroidery head is needed. Another advantage is that the presser foot is no longer directly coupled to the movement of the needle tappet. This has, among other things, the further great advantage that the presser foot is not subject to the movement pattern of the needle and can even obtain a completely independent movement pattern. The inventive multi-needle embroidery machine, which builds on the already known for many decades Singer embroidery sewing machine, thus goes a completely new approach. Due to the increased distance of the fabric presser from the needle in comparison with the prior art, there is also no risk that the stitch formation process will be hindered. In the previously known and initially cited embroidery machines, the fabric presser is very close to the needle. Usually, the distance between the needle and the fabric presser is between 2 and 4 millimeters. This means that the maximum stitch length is limited to this distance from 2 to 4 mm. Otherwise, namely, would be trapped in the stitch formation of the upper thread between the fabric presser and the needle plate, which can lead to a yarn breakage.

Advantageously, the presser unit comprises a presser tab, to which a presser finger is preferably releasably secured, wherein the presser finger is located at a distance from a needle arranged on the needle tappet. The distance of the fabric presser finger is preferably more than 5 mm, preferably more than 10 mm and most preferably 12 or more mm from the needle.

Advantageously, each presser unit is driven by a separate gear. This has the advantage that not too large masses must be moved. An advantageous embodiment provides that the material pressing units can be driven by a common drive shaft. This has the advantage that the synchronization with the needle movement is simplified. The drive shaft may be arranged on the carrier and extend over the entire length of the machine, Incidentally, the drive shaft for the presser unit may be coupled to a central drive shaft.

Advantageously, a separate from the needle drive unit gear is driven for the presser unit. For the drive of the presser unit differently trained, known in the art gear, such as a coupling or cam gear can be used. According to one embodiment, the transmission comprises a pivotable about a pivot axis pivot lever which drives the presser unit. Such a pivot lever is preferably arranged stationary and rotationally fixed on an axis. Cams, eccentrics, cams, etc. can be used to generate a swinging motion. be used. One solution provides a gear with cams which converts the rotary motion of the drive shaft into a reciprocating motion of the presser foot. Alternatively, the transmission may include a lever mechanism and an eccentric gear to produce the reciprocating movement of the presser foot. A cost-effective solution provides that the drive shaft is coupled to generate the oscillating movement with the main drive shaft of the embroidery machine. This can be done by toothed belts, chains or in other ways. As a result, the presser foot moves completely synchronously with the needle drive.

According to a preferred embodiment, the presser foot is articulated on the first end of the pivoting lever, and the transmission engages on the second end. This is a simple and reliable design that can be manufactured inexpensively. Advantageously, a first and a second extension are provided at a distance from each other at the second proximal end of the pivot lever. These two first and second extensions are advantageously arranged on opposite sides of a plane passing through the pivot axis of the pivoting lever and the axis of rotation of the drive shaft. In this case, on the first extension, a first eccentric disc engage to produce a movement of the pivot lever in one direction and the second extension attack a second eccentric to produce a movement of the pivot lever in the opposite direction. This embodiment enables a virtually play-free oscillating movement of the pivot lever.

Advantageously, the presser comprises a Stoffdrücker ram, whose first end is articulated via a balancing connecting rod at the first end of the pivot lever, and at the second end of a presser finger is fixed. The compensation piston compensates for the deflection, which is generated by the partial circular movement of the pivot lever. Conveniently, the presser finger is made of an elastically deformable material, preferably spring steel. This can be inexpensively produced by means of forming technology from a steel sheet.

Advantageously, the part of the presser finger which contacts the fabric is preferably coated with elastic plastic. This has the advantage that on the one hand thin, sensitive substances can be processed and on the other hand, better adhesion can be achieved for normal substances. Advantageously, the fabric presser is made axially movable relative to Stoffdrückerstössel. This has the advantage that different high embroidery and / or different thicknesses of materials can be recorded. In contrast to the conventional multi-head multi-needle embroidery machines, in each of which a presser foot is provided on each needle plunger and with these laterally displaceable, the presser foot is arranged stationary on the embroidery machine, that is not moved laterally. Even if in principle only one embroidery head with several needle locations can be provided, according to the preferred embodiment, a plurality of embroidery heads are arranged laterally movably on a mounting rail. In this case, the embroidery head is moved so far laterally relative to a drive element to select another needle point until the desired needle point can interact with the drive element.

As already known from the prior art, an embroidery machine frame is provided on which the drive for the stitch-forming members is preferably stationary, i. stationary, is arranged. In this case, the one or more embroidery heads having a plurality of needle locations are laterally displaceable relative to the drive. Advantageously, a plurality of embroidery heads is provided.

Fig. 1

Eine herkömmliche Mehrkopf-Mehrnadel-Sticknähmaschine mit mehreren Stickköpfen in einer perspektivischen Ansicht;

Fig. 2

Ein einzelner Stickkopf einer bekannten Mehrkopf-Mehrnadel-Sticknähmaschine mit mehreren Nadelstellen in einer Frontansicht;

Fig. 3

Eine erfindungsgemässe Stoffdrückereinheit mit einem Stoffdrücker, einem am Stoffdrücker angeordneten Stoffdrückerfinger sowie dem Getriebe für den Stoffdrücker in Seitenansicht;

Fig. 4

Das Getriebe von Fig. 3 näher in perspektivischer Ansicht;

Fig. 5

Der Stoffdrückerfinger näher im Detail; und

Fig. 6

Eine perspektivische Teilansicht eines Stickkopfes mit mehreren Nadelstellen und einem Stoffdrücker.

An embodiment of an inventive multi-head multi-needle embroidery machine will be described below by way of example with reference to FIGS. Showing:

Fig. 1

A conventional multi-needle embroidery sewing machine with multiple embroidery heads in a perspective view;

Fig. 2

A single embroidery head of a known multi-needle multi-needle embroidery sewing machine with multiple needle locations in a front view;

Fig. 3

An inventive presser unit with a presser foot, arranged on the fabric presser fabric presser finger and the gearbox for the presser footer in side view;

Fig. 4

The transmission of Fig. 3 closer in perspective view;

Fig. 5

The presser finger closer in detail; and

Fig. 6

A partial perspective view of an embroidery head with several needle points and a fabric presser.

The presser unit 11 shown in the figures essentially comprises an axially upwardly and downwardly movable presser foot 13 and a gear 15 for producing the material presser movement. The presser 13 consists of a Stoffdrücker ram 17, at the first end of a compensation spigot 19 is hinged, and at the second end of a fabric presser finger 21 is releasably attached. The Stoffdrückstössel 17 is guided axially displaceable by means of one or more bearings or guide bushes not shown in the figure.

The presser finger 21 has a lower portion 22 with a preferably flat foot 23 which abuts the embroidery material during operation of the embroidery machine and in the lower dead position of the fabric presser (s. Fig. 3 and 5 ). An upper portion 24 of the Stoffdrückerfingers 21 is U-shaped and serves for attachment to the Stoffdrückstössel 17. In the each other parallel legs 25,27 of the U-shaped portion recesses 29,31 are provided, through which the Stoffdrückstössel 17 may extend with its second end. The presser finger 21 is fastened by means of a clamping block 35 releasably attached to the Stoffdrückstössel 17. The terminal block 35 is fastened by means of a locking screw 37 on Stoffdrückstössel 17.

The Stoffdrückerfingerfinger 2list by a protruding from the terminal block 35 pin 33 in the slot 34 against rotation. The pin 33 protrudes through a slot 34 in the base leg of the U-shaped portion of the presser finger. The longitudinal extent of the slot limits the maximum travel of the presser finger 21 relative to the Stoffdrückstössel 17. A Stoffdrückerstössel 17 between the clamping block 35 and the leg 25 arranged spring 28 pushes the leg 25 down and pulls the leg 27 to the stop 26, which preferably from dampening Material exists. As a stop 26, for example, serve a plastic washer. As plastic material for the stop 26, an elastomer can also be used. Due to the resilient and resilient design of the presser finger 21, on the one hand, differently high embroideries and, on the other hand, fabrics of different thicknesses can be retained on an embroidery plate present under the embroidery material.

The foot 23 is arranged via a connecting part 28 on the leg 25 of the presser foot 21. The foot 23 is formed as a plane, preferably approximately rectangular contact plate, which extends approximately parallel to the legs 25,27 and preferably in alignment therewith. In contrast to conventional presser foots, the present presser foot has no recess or opening for a needle, since it is arranged at a greater distance from the needle.

The gear 15 for generating the material pressing movement in the axial longitudinal extent (arrow 39) comprises a pivotable about a pivot axis 41 pivot lever 43, which with its first end with the presser foot 13, respectively. the compensation connecting rod 19, hinged ( Fig. 3 ). At the second end of the pivot lever 43, a first extension 45 and a second extension 47 are formed. On the first extension 45, a first roller 49 is freely rotatably mounted, which can cooperate with a first cam 51 of the transmission 15. On the second extension 47, a second roller 53 is freely rotatably mounted, which with a second cam 55 of the transmission 15th can interact. The two cam disks 51, 55 define eccentric cam tracks with their circumference. These cam tracks are formed so that the pivot lever 43 is performed by cooperation of the eccentric cam 51,55 with the rollers 49,53 during one revolution of the cam 51,55 play. This is achieved by a cam follower seated on a slightly eccentric bolt, and this bolt is rotated until the pivot lever runs free of play. The cams 51,55 are rotatably mounted on a rotatable about a rotation axis 57 drive shaft 59. This drive shaft 57 serves the common drive of all fabric presser of an inventive multi-head embroidery machine. Instead of cams, another motion conversion mechanism known to those skilled in the art may be used, which converts a rotary motion of a drive shaft into an oscillatory motion of a stitch forming member such as a presser foot. This may for example be a cam with an endless cam groove or track, which is arranged rotationally fixed to the drive shaft. In the cam track, a cam follower is guided, which converts the rotary motion of the drive shaft into a reciprocating motion.

FIG. 6 shows a partial view of an embroidery head 61 in a perspective view. The view shows the needle at bottom dead center of the stitch formation movement. The embroidery head 61 shown has a total of 6 needle points 63, each of which is equipped with a large thread guide 65, thread guide means 67 and a needle tappet 70 with needle 69 arranged thereon. It can be seen that only one single presser foot 13 per embroidery head 61 is provided, which is stationary, ie non-displaceable laterally, arranged on a carrier 71. On the carrier 71 one and preferably a plurality of guides 73 are provided (in Fig. 6 only one is shown), along which the embroidery head 61 is displaceable with the needle points. This means that the embroidery head 61 is designed as a carriage, which is mounted displaceably on the guides 73. The carrier 71 is fixedly arranged on an embroidery machine frame 72, not shown in detail.

Under the embroidery head 61, a stitch plate 75 is provided, on which a sticking surface rests during the embroidering. The needle plate 77 is provided in the needle plate 75, through which the needle 69 can guide the needle thread on the back of the embroidery ground. There is a distance a between the needle 69 and the presser foot 21 which is greater than 5 mm, preferably more than 8 mm and most preferably more than 12 mm.

To select a specific needle point for the embroidery process, the embroidery head 61 is displaced relative to the carrier 71 until that point of the needle, which is equipped with the desired thread, is positioned in front of a drive element not shown in detail. In this position, the drive element is coupled to the needle plunger so that the oscillating movement of the needle plunger can be effected via a rotating drive shaft and a corresponding gear. In contrast to the needle drive, the fabric pusher ram can be permanently coupled to the drive ".

An embroidery machine, in particular a multi-needle embroidery machine, has at least one embroidery head arranged on a carrier 71, which has a plurality of needle locations 63. The needle points 63 are arranged laterally displaceable relative to an embroidery point in a direction of displacement along the carrier 71. Each needle point 63 includes by definition all essential stitch forming organs, such as a thread guide 65, various thread guide devices 67, and arranged on a needle tappet 70 needle 69. The needle tappets 70 arranged thereon needles 69 are respectively by a needle drive unit in a first direction back and forth respectively. movable up and down. Each embroidery head is associated with a lower thread unit, which supplies the lower thread. A arranged on a frame 72 gear 15 ensures the synchronous movement of the stitch-forming organs of the upper thread unit and the lower thread unit. The described multi-needle embroidery machine is characterized in that on the frame 72 per embroidery head at least one presser unit 11 is provided with an axially movable presser foot 13 at a distance from the needle tappet 70.

Legend

11

Presser unit

13

presser

15

transmission

17

Presser ram

19

Ausgleichspleuel

21

Presser finger

22

lower section of the presser finger

23

Foot of the presser finger

24

Upper section of the presser finger

25.27

Legs of the U-shaped section

26

attack

29.31

Recesses in the thighs

28

feather

29

Recess in the leg 25

30

connecting part

31

Recess in the leg 27

33

screw

34

Long hole

35

terminal block

37

locking screw

39

Axial direction of movement of the fabric pusher turret

41

Swivel axis of the pivot lever

43

pivoting lever

45

First extension

47

Second extension

49

First roll on the first extension

51

First cam

53

Second roll on the second extension

55

Second cam

57

Rotary axis of the drive shaft

59

Drive shaft for cams

61

Stick head

63

needle points

65

big thread guide

67

Yarn guides

69

needle

70

needle plunger

71

carrier

72

Stick machine frame

73

guide rails

75

needle plate

77

pinhole

Claims (15)

A multi-head embroidery machine, comprising a plurality of embroidery heads arranged on a carrier (71), each embroidery head having a plurality of needle locations (63) which are displaceable relative to an embroidery location in a direction of displacement along the support (71), ie laterally and each needle point (63) has a needle tappet (70) on which a needle (69) arranged or. can be arranged
a transmission (71) arranged on the support for generating the reciprocating movement of the needle ram, and
in each case a single presser unit (11) with an axially movable presser foot (13) for each embroidery head, comprising in each case one transmission for each presser foot,
characterized,
in that the gears of the presser units (11) are driven by a common presser drive shaft (59). Embroidery machine according to claim 1, characterized in that the axially movable presser foot (13) is arranged at a distance to a needle attached to the needle ram (70). Embroidery machine according to claim 1 or 2, characterized in that the presser unit (11) comprises a Stoffdrückerstössel (17) to which a presser finger (21) is preferably releasably secured, wherein the presser finger (21) at a distance from the needle plunger (70) respectively a needle arranged on the needle ram (70) is located. Embroidery machine according to one of claims 1 to 3, characterized in that the transmission (15) comprises a pivotable about a pivot axis (41) pivoting lever (43) which drives the presser unit (11). Embroidery machine according to one of claims 1 to 4, characterized in that the transmission (15) comprises cams (51,55) which generates the reciprocating movement of the presser foot (13). Embroidery machine according to one of claims 1 to 5, characterized in that the transmission (15) by a lever mechanism and an eccentric gear generates the reciprocating movement of the presser foot (13). Embroidery machine according to one of claims 1 to 6, characterized in that at a first end of the pivot lever (43) of the presser foot (13) is articulated and at the second end, the gear (15) engages. Embroidery machine according to one of claims 4 to 7, characterized in that at the second end of the pivot lever (43) a first and a second extension (45,47) are provided at a distance from each other, which first and second extensions (45,47) opposite sides of a through the pivot axis (41) of the pivot lever (43) and the rotation axis (57) of the drive shaft (59) going plane are arranged, and
a first eccentric disk (51) engages on the first extension (45) to produce a movement of the pivoting lever (13) in one direction and on the second extension (47) engages a second eccentric disk (55) to produce a movement of the pivoting lever (13) opposite direction. Embroidery machine according to one of claims 1 to 8, characterized in that the presser foot (13) comprises a Stoffdrückerstössel (17) whose first end via a compensating connecting rod (19) at the first end pivot lever (13) is articulated, and at its second end Presser finger (21) is fastened. Embroidery machine according to claim 9, characterized in that the presser finger (21) is made of an elastically deformable material, preferably spring steel, and the part of the presser finger (21) which contacts the fabric is preferably coated with plastic. Embroidery machine according to one of claims 1 to 10, characterized in that the presser foot (13) is stationary. Embroidery machine according to one of claims 1 to 11, characterized in that a frame (72) is provided, on which the drive for the stitch-forming organs is arranged, and that the one or more embroidery heads are laterally displaceable relative to the drive. Embroidery machine according to one of claims 1 to 12, characterized in that the presser finger (13) relative to the Stoffdrückerstössel (17) is designed to be axially movable. Embroidery machine according to one of claims 1 to 13, characterized in that the embroidery machine is a multi-head multi-needle embroidery machine, in which each embroidery head is assigned in each case a presser unit (11). Embroidery machine according to one of claims 1 to 14, characterized in that the same drive shaft is used for driving the needle ram, the fabric presser and preferably the large thread guide.

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