EP2314746A1 - Multihead and multineedle embroidery machine and its tension frame - Google Patents

Abstract

The machine has embroidery heads comprising needle points are displaceable relative to an embroidery position in x-direction. Each needle point has a needle moved back and forth in z-direction, and a bobbin thread unit is attached to each embroidery head. A stentering frame (11) for fixing an embroidery material is arranged between each embroidery head and its associated bobbin unit. Fabric holding elements are arranged at a distance to each other in y-direction, and are formed as rotatable fabric rollers (13, 15), where a stock of the embroidery material is wound on the fabric rollers.

Description

The present invention relates to a multi-head embroidery machine according to the preamble of claim 1 and a tenter according to the preamble of claim 14.

According to the book " Embroidery Techniques "by Friedrich Schöner and Klaus Freier (VEB Fachbuchverlag Leipzig, 1982, 1 .Auflage ) 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 a large table top 3, 4, 6, 10 or 12 Singer embroidery machine heads are mounted, 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 sewing machine 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 ).

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 will be referred to as multi-needle multi-needle embroidery machines for better discrimination. 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 stick head is a throat plate in which a needle hole is provided for the needle and which locally defines the point of embroidery. 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 colored embroidery can be performed by always only the corresponding needle is put into action.

The needle tappet and their assigned thread levers of a group of needles are usually stored in a carrier that brings the selected needle tappet and the associated thread lever in front of 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.

The tenter of the conventional multi-head multi-needle embroidery sewing machines comprises two spaced-apart fabric holding elements, between which the fabric is fastened. For clamping the material, which is also referred to in the jargon as the embroidery ground, this must be stretched and clamped sections. At the side edge, the embroidery is also stretched and clamped. Usually, the known multi-head embroidery sewing machines are equipped with a clamping frame, one dimension of which is substantially the length of the machine (x-direction) and the other dimension (= y-direction) about 150 cm to 180 cm. The entire clamping frame is movable by means of known guide devices and drive means in the x and y directions in order to be able to embroider the entire surface of the embroidery material.

The bobbin thread for the embroidery head is provided by a bobbin respectively, which is accommodated in a housing as used in any conventional sewing machine. On the spool can be wound up to 100 m thread. This has the consequence that in the multi-head embroidery machines, the spools are changed relatively of. If the thread supply is used up, the spool must be changed.

A disadvantage of the known multi-head multi-needle embroidery sewing machines is that they have a relatively large space requirement, which corresponds in one direction to twice the depth (y-direction) of the clamping frame. The large clamping frame also brings the disadvantage that during operation of the machine, the spool with the lower thread is poorly accessible. It is often necessary to crawl under the tenter to replace the spool to advance to the spool, or it may need to be climbed on the machine to fix upper thread breaks. The large clamping frame thus leads to a significant disability in the operation of the embroidery machine.

The publication DE-A-37 20 907 discloses a shuttle embroidery machine in which two panels are arranged one above the other. The fabric panels are wound on goods trees (= fabric shafts), which are supported on the hoop of the machine. For a motorized rotation of the goods trees individually to rupture the fabric or synchronous to re-waves is both the upper and the lower cloth tree via an endless belt with the drive shaft of a motor optionally in drive connection. By means of a convertible belt tensioning lever, which is arranged at the free end of the drive shaft, either the upper or lower belt can be moved and thus a forward or return transport of the fabric can be accomplished. From the DE-A-37 20 907 does not show how the fabric could be stretched or curled in a stretched state.

The EP-A-0 148 127 discloses a gate for a large embroidery machine, in which the fabric waves are connected to each other via a traction means, in such a way that the pulp waves remain rotatable only in the untensioned state. As a drive for tensioning the wound on the fabric waves Stickereig serves a relative to the gate freely displaceable motor. The pulp shafts have frontally each have a toothing in the form of a ring gear in which a pivotally mounted pawl can engage. With loose material the rear end of the pawl comes into abutment with a plate, whereby the pawl disengages from the teeth and the shafts are freely rotatable. A disadvantage of this gate is that under tension not nachgewellt, ie material can be transferred from one to the other shaft, since the interposed motor limits the displacement.

Object of the present invention is to propose a multi-head embroidery machine, which does not have the disadvantages mentioned above. In particular, it is an object to provide a multi-head embroidery machine which is more efficient than conventional machines. Another aim is to provide a machine in which larger embroidery grounds can be embroidered than with conventional multi-head embroidery sewing machines with a smaller footprint. Yet another goal is to provide a machine that has a small footprint.

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 locations are relative to an x-direction embroidery location, i. laterally, slidably arranged on a table or 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 transmission, e.g. with a central drive shaft to synchronously drive the upper and lower thread unit.

According to the invention, the object is achieved in an embroidery machine according to the preamble of claim 1, characterized in that the fabric-holding elements are formed as first and second rotatable fabric shafts, on which a supply of material can be wound. The embroidery machine according to the invention has the great advantage over the conventional multi-head multi-needle embroidery sewing machines that it requires much less space than the conventional ones. Thanks to the fabric shafts, the depth of the tenter can be reduced to about half the original dimensions. Nevertheless, larger fabrics can be embroidered, because a large fabric surface can be undulated on the fabric waves Another advantage is that the machine is more accessible, eg for a thread change, and that the embroidery ground can be easily waved, since the fabric always remains clamped.

Advantageously, the first pulp shaft and the second pulp shaft are connected to one another via coupling means. The coupling means make it possible to independently rotate the two pulley shafts and then to fix them again, thus maintaining the once set pulp tension. The coupling means are designed to detect the pulp waves in arbitrary rotational positions relative to each other. This can be done for example by means of a freewheel provided on the pulp shafts. By rotating a shaft, the fabric web arranged on the tenter frame can be tensioned. Advantageously, the two fabric shafts are connected to one another by means of an endless toothed belt, an endless chain or a shaft. Conveniently, the coupling means or the freewheel have an idle position. This position can be used for the Nachwellen the fabric.

According to a preferred embodiment, the first pulley shaft are connected to first drive means and the second pulley shaft to second drive means. In this case, the first and the second drive means are preferably coupled to one another by means of coupling means or coupled to one another by means of a freewheel (overrunning clutch). The drive means may be realized by chain or belt drives, or drive shafts. The mechanical coupling of the two fabric shafts has the advantage that even the tensioned fabric can still be moved - this in contrast to the known fixed clamping frames, which are used in the multi-head multi-needle embroidery machine for decades.

Advantageously, the coupling with each other on a form-fitting cooperating coupling parts. This is a simple, inexpensive and robust design. A very advantageous embodiment provides that the coupling is designed as a slip clutch. It is particularly advantageous if the clutch can slip in the torque transmission in a particular direction of rotation, but not in the torque transmission in the opposite direction of rotation. This feature is important, for example, in fabric clamping. Conveniently, the coupling parts are formed by arranged on a circular path and projecting in the axial direction of the clutch teeth. The Clutch teeth can have the shape of saw teeth and have a sloping edge.

Advantageously, one of the coupling parts is biased by spring means in the coupling position. In combination with sawtooth clutch teeth thus a simple and efficient slip clutch is realized. Preferably, the coupling is arranged on a coupling shaft, wherein the first coupling part with a first drive member, such as a chain or pulley, is rotatably connected, which respectively via a chain or toothed belt with the first pulley shaft. a arranged on this chain or pulley, and the second coupling part with a second drive member, such as a chain or pulley, rotatably connected, which via a chain or a toothed belt with the second pulley shaft respectively. a coupled on this chain or pulley is coupled. Advantageously, the second coupling part is mounted axially displaceably on the coupling shaft and biased by spring means in the coupling position. Of the two coupling parts is preferably one rotatably connected to the drive shaft.

A very expedient embodiment provides that are provided at the end of the fabric shaft and at the end of the coupling shaft engaging means for a hand tool. This means that the fabric can be tensioned without a motor, although the use of a motor is not excluded. With the help of this means of attack, the material spanned between the fabric waves fabric can be stretched quickly with a hand tool. Conveniently, the clamping frame is arranged substantially horizontally on a table or embroidery machine frame.

Preferably, the fabric shafts are provided with profile recesses, in which a terminal strip or a smaller clamping frame is used. These may be formed in a manner known to those skilled in the art.

Advantageously, guide means are provided for the clamping frame in order to move the clamping frame in the x and y directions. In addition, drive means are expediently provided which are coupled to the clamping frame in order to move the clamping frame in the x- and y-direction during the embroidering process. The bearing for the clamping frame and the drive means may be carried out as in the prior art.

A preferred embodiment provides that a clamping device is provided with a plurality of spaced apart and pivotable clamping levers. These clamping levers are pivotable from a first stickgrundfernen position in a second, stickgrundnahe position. The clamping levers can interact directly with the needle plate or a clamp block placed on the needle plate to fix the fabric web. The clamping of the fabric allows a Nachwellen the fabric. When reverberating the tensioned fabric is posted after clamping on the side tension rods. Then, by moving the clamping frame, the fabric is unwound from a cloth shaft and wound up on the other fabric shaft. Instead of the clamping device could also be provided a sensor device by means of which the position of the Anstickstelle can be maintained.

The present invention is also a tenter for a multi-head multi-needle embroidery machine according to the preamble of claim 14, which is characterized in that the fabric support members are formed as first and second freely rotatable fabric shafts on which a supply of embroidery material can be wound. Advantageous developments of the clamping frame are defined in the subclaims. The tenter according to the invention has the advantage that longer lengths of fabric can be embroidered than with conventional tentering frames which have hitherto been used in multi-head Mehmadel embroidery machines.

Fig. 1

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

Fig. 2

Einen einzelnen Stickkopf einer bekannten Mehrkopf-Mehrnadel-Sticknähmaschine mit mehreren Nadelstellen in einer Frontansicht;

Fig. 3

Ein Ausführungsbeispiel eines erfindungsgemässen Spannrahmens mit zwei mittels eines eine Kupplung aufweisenden Kettentriebs gekoppelten Stoffwellen in perspektivischer Teilansicht;

Fig. 4

Den Kettentrieb von Fig. 3 mit der Kupplung in Explosionsdarstellung;

Fig. 5

Die Kupplung in einer ersten perspektivischen Darstellung näher im Detail;

Fig. 6

Die Kupplung von Fig. 5 in einer anderen Perspektive;

Fig. 7

Ausschnittsweise eine Frontansicht einer erfindungsgemässen Stickmaschine mit einer zwischen zwei Stickköpfen angeordneten Klemmvorrichtung zum Festklemmen einer Stoffbahn;

Fig. 8

Die Stickmaschine von Fig. 7 in Seitenansicht; und

Fig. 9

Schematisch das Spannen, Aufwellen und Nachwellen einer Stoffbahn.

Fig. 10

Ausschnittsweise die vordere rechte Ecke des Spannrahmens mit einer seitlichen Seitenspannleiste;

Fig. 11

Wie Fig. 10, jedoch mit einem Magazin;

Fig. 12

Der Spannrahmen von Fig. 10 mit angekoppeltem Magazin;

Fig. 13

Ein einzelnes Segment einer Spannleiste.

Embodiments of the invention will be described by way of example with reference to the figures. It shows:

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 embodiment of an inventive clamping frame with two coupled by means of a coupling chain drive pulp waves in a perspective partial view;

Fig. 4

The chain drive of Fig. 3 with the coupling in exploded view;

Fig. 5

The coupling in a first perspective view in more detail in detail;

Fig. 6

The coupling of Fig. 5 in a different perspective;

Fig. 7

A detail of a front view of an inventive embroidery machine with a arranged between two embroidery heads clamping device for clamping a fabric web;

Fig. 8

The embroidery machine of Fig. 7 in side view; and

Fig. 9

Schematically the tensioning, rippling and re-wave of a fabric.

Fig. 10

Partly the front right corner of the clamping frame with a lateral side clamping bar;

Fig. 11

As Fig. 10 but with a magazine;

Fig. 12

The clamping frame of Fig. 10 with coupled magazine;

Fig. 13

A single segment of a clamping bar.

The in FIG. 3 shown clamping frame 11 for a sewing base has two pulp shafts 13,15 which are rotatably mounted on side parts 17. The fabric shafts 13,15 have at its periphery a profile recess extending in the axial direction 19, in which a terminal strip not shown in detail can be inserted. In this case, an edge of the embroidery ground between the terminal block and the profile recess 19 is clamped.

The clamping frame 11 is intended for a multi-head Mehmadel embroidery sewing machine, whose conventional clamping frame so far did not allow re-waves of the embroidery ground. For this reason, the conventional tenter frames were usually approx. 150 cm deep, so that embroidery bases with a larger surface area could also be embroidered. In the present case, the clamping frame 11 only requires a depth of less than 120 cm, preferably less than 100 cm, and particularly preferably about 80 cm or less, because the embroidery base can be corrugated. The fabric waves extend over the entire length of the embroidery machine and can be supported if necessary by so-called shafts. The diameter of the fabric shafts can be ≦ 120 mm, preferably ≦ 100 mm and particularly preferably ≦ 90 mm.

The fabric shafts 13, 15 are coupled to one another by means of a first and a second chain drive 21, 23 and a coupling 25 arranged between the chain drives 21, 23. The coupling 25 is formed by two trained as rings coupling parts 27,29 with axially projecting saw teeth 31 ( FIGS. 4 to 6 ). The first coupling part 27 is rotatably connected to a first sprocket 33 of the first chain drive. advantageously, is the coupling part 27 and the sprocket 53 made in one piece. The second coupling part 29 is rotatably connected to a second sprocket 35 of the second chain drive 23. Between the second sprocket 35 and the second coupling part 29, two compression springs 37 are arranged, which press the second coupling part 29 against the first coupling part 27 in a coupling position in which engage the saw teeth. The coupling part 27 and the sprocket 33 are rotatably mounted on a coupling shaft 39. The coupling part 29 and the sprocket 35 can be transmitted by a suitably trained engaging means, such as a square connection 39, torque.

A shift lever 41, which acts on the second coupling part 29 with an eccentrically formed head 43, allows the saw teeth 31 of the second coupling part 29 to be disengaged from the saw teeth of the first coupling part 27, so that the chain drives 21, 23 are decoupled from each other. In this uncoupled position, the pulp shafts 13, 15 can be rotated independently of each other, e.g. a embroidery ground be curled or swelled. By according to the preferred embodiment sawtooth design of the teeth 31, which have on one side a very steep flank and on the other side an oblique flank, the first coupling part 27 slip over the second coupling part 29 when the latter is locked and the first in Direction of the arrow 45 is rotated. This option is used when a corrugated embroidery ground needs to be tensioned. For this purpose, at the end of the coupling shaft 39 and the cloth shaft 13, engaging means 47, e.g. an external square or hexagon, intended for a tool.

How out Fig. 3 shows, the side parts 17 are formed by two spaced-apart side plates 49, which are interconnected by transverse webs 51. In the intermediate space 55 formed between the side plates 49 and a base plate 53, the two chain drives 21,23 are arranged. The pulleys 13,15 and the coupling shaft 39 are rotatably mounted in bearing sleeves 57 which are received in holes of the side plates 49. Preferably, this side part can also be designed as a unilaterally open, tubular sheet metal bent part. The side parts can be advantageously designed as a U-shaped sheet metal profile.

As in particular from the FIGS. 4 to 6 As can be seen, the chain drives 21,23 still further gears 59,61,63,65, which serve for tensioning and deflecting the chains 67,69.

A preferred embodiment of an inventive multi-head multi-needle embroidery machine 70 (s. FIGS. 7 and 8 ) is equipped with a clamping device 71. With the aid of this clamping device 71, a stitched in the clamping frame 11 embroidery ground on the stitch plates 73, which are located under the embroidery heads 75, are clamped. The clamping device 71 comprises a plurality of spaced apart clamping levers 77, which can be pivoted by a separate drive from the needle drive 79 from a starting position in which the clamping lever 77 are pivoted away from the throat plates 73, in a working position, in which the clamping lever 77 clamp the clamped in the clamping frame 11 fabric. The stitch plates 73 act as an abutment.

How out FIG. 8 it can be seen that the clamping lever 77 is pivotally mounted on an axle 81. The drive, such as a compressed air cylinder, engages an end 83 of the clamping lever 77 and allows the pivoting of the clamping lever 77. Advantageously, the clamping lever 77 does not clamp the embroidery base directly to the throat plates 73, but instead a clamping strip 85 is used. This terminal strip 85 is first placed on the throat plates 73 and then pressed with the clamping levers 77 against the throat plates. At opposite ends of the terminal block 85 provided needles 87 allow the fixation of the fabric also at the edge region. For material clamping only isolated clamping levers are necessary. A single clamping lever can be provided per 3, 4 or 5 embroidery heads.

In FIG. 9a the pulp shafts 13, 15 and a material web 89 stretched between them are shown. The reference numeral 91 denotes the needle of the upper thread unit. For tensioning the fabric web 89, the fabric shafts 13, 15 are rotated in the opposite direction (arrows 92, 93) until the fabric web 89 is sufficiently tensioned.

FIG. 9b shows the fabric shaft 13 with a supply of fabric to be embroidered 89. For embroidering this substance it is stretched between the shafts 13,15 ( Fig. 9c ). When embroidering the tenter moves with the fabric shafts 13,15 from left to right until the clamped fabric surface is almost completely embroidered ( Fig. 9d ). After that, the stuff becomes pressed with the help of the terminal block 85 to the throat plates, which prevents a displacement of the substance (see. FIGS. 7 and 8 ). Once the fabric is fixed in place, the side edge of the fabric can be released by removing the side straps (not shown). Thereafter, unconsumed material can be corrugated by the pulp shafts 13,15 are rotated in the same direction. By moving the clamping frame against the embroidery direction of the embroidered fabric on the shaft 15 and the unused substances unwound from the shaft 13 ( Fig. 9e ). Then, if necessary, the material can be re-tensioned and the terminal strip removed. The clamping strip 85 ensures that the fabric around the needles 91 does not change its last position with respect to the needle.

Alternatively, when reverberating to ensure compliance with the last assumed embroidery position and a sensor can be used. For example, said sensor marks a point on the embroidery ground and, in conjunction with the embroidery machine control, ensures that the point is again in exactly the same position after the re-wave. In practice, the Nachwellen preferably takes place synchronously with the retraction of the clamping frame, so that the last assumed embroidery position does not move with respect to the needle.

Thus, the embroidery base is stretched uniformly over its entire width, it is horizontally stretched laterally, each with a side clamping strip transverse to the clamping direction of the waves and finally tightened in the vertical direction. On the side of the side parts 17 oriented toward the embroidery base, a guide, for example in the form of a U-shaped guide channel 97, is provided, in which a plurality of side tensioning strip parts 99 are accommodated. The side clamping strip parts 99 are arranged displaceably in the guide channel 97. When re-wave, ie, when the embroidery base 89 is rolled onto the shaft 13, the side tensioning strip parts 99 are pushed out of the guide channel. For collecting the side clamping strip parts 99, a magazine 101 is advantageously docked to the front end of the guide channel 97. The magazine 101 is dimensionally designed so that all side clamping strip parts 99, which are ejected during the Nachwellen from the guide channel 97, find space in it. If the embroidery base has corrugated, the magazine 101 is docked at the rear end of the guide channel 97 by means of a coupling bracket 103, and the side clamping strip parts are preferably pushed manually into the guide channel. Thereafter, the embroidery base can be tensioned laterally by being impaled on the needles 105 of the side tensioning strip parts 99.

The side clamping strip parts 99 are preferably 15 to 40 cm long forming parts, at the one longitudinal edge 107 of which a row of needles 105 are arranged ( Fig. 11 ). On the opposite longitudinal edge 109 guide pins 111 are provided, which fit into the guide channel 97.

A multi-head embroidery machine has a plurality of embroidery heads and per embroidery head a plurality of needle locations. The needle points are arranged laterally displaceable relative to a stitching point on a carrier. Each needle point has at least one thread guide, thread guiding devices and a needle arranged on a needle plunger, which is mounted reciprocally movable in a first direction. Each embroidery head is assigned a lower thread unit. A gear ensures the synchronous movement of the upper thread unit and the lower thread unit. Between the upper thread unit and the lower thread unit, a clamping frame for clamping a substance on a support is preferably arranged horizontally. which has two spaced-apart first and second fabric support members. These fabric holding elements are designed as first and second rotatable fabric shafts, which are coupled or coupled together and on which a supply of embroidery material can be wound up.

Legend

11

tenter

13

First fabric wave

15

Second cloth wave

17

Side parts of the clamping frame

19

profile recess

21

first chain drive

23

Second chain drive

25

clutch

27

First coupling part

29

Second coupling part

31

Saw teeth of the coupling parts

33

first sprocket of the 1st chain drive

35

Second sprocket of the 2nd chain drive

37

compression spring

39

clutch shaft

41

gear lever

43

eccentric head

45

Arrow (direction of rotation during stockpiling)

47

plea

49

side plates

51

crossbars

53

baseplate

55

Space between the side plates

57

Bushings for fabric and coupling shaft

59,

Auxiliary gears

61,63,65 67

Chain of the 1st chain drive

69

Chain of the 2nd chain drive

70

Multi-head multi-needle embroidery machine

71

Panel clamp

73

needle plate

75

Stick head

77

clamping lever

79

Drive for clamping lever

81

axis

83

Upper end of the clamping lever

85

terminal block

87

needles

89

Fabric, embroidery ground

91

needles

92.93

arrows

97

guide channel

99

Helix strip parts

101

magazine

103

coupling bracket

105

Needles of the side clamping parts

Claims (15)

Multi-head embroidery machine, comprising at least one embroidery head (75), which embroidery head (75) has a plurality of needle locations, which are arranged displaceable relative to an embroidery point in the x-direction, wherein the needles (91) in the z-direction reciprocally movable are and - Each one an embroidery head (75) associated lower thread unit and - A clamping frame (11) for clamping an embroidery material (89), which is arranged between the embroidery head (75) and the lower thread unit, with two spaced apart first and second fabric holding elements (13, 15) in the y-direction, characterized, - That the fabric-holding elements as the first and second rotatable fabric shafts (13,15) are formed, on which a supply of embroidery material (89) is wound up. Embroidery machine according to Claim 1, characterized in that the first fabric shaft (13) and the second fabric shaft (15) are connected to one another via coupling means. Embroidery machine according to Claim 2, characterized in that the coupling means (25) are designed to detect the fabric shafts (13, 15) in any rotational position relative to each other. Embroidery machine according to one of claims 1 to 3, characterized in that the first pulley shaft (13) with first drive means (21) and the second pulley shaft (15) with second drive means (23) is in communication, and the first and the second drive means ( 21, 23) can be coupled to one another by means of coupling means. Embroidery machine according to claim 4, characterized in that the first and the second drive means (21, 23) are realized by chain or belt drives or drive shafts. Embroidery machine according to claim 4 or 5, characterized in that the coupling means (25) is designed as a slip clutch and preferably having mutually positively cooperating coupling parts (27,29). Embroidery machine according to one of claims 1 to 6, characterized in that the clamping frame is arranged substantially horizontally. Embroidery machine according to one of claims 2 to 7, characterized in that the coupling means (25) comprise a first and a second coupling part (27,29) and on a coupling shaft (39) are arranged, wherein the first coupling part (27) with a first Drive member (33) is rotatably connected, which is coupled via a chain (67), belt or shaft with the first fabric shaft (13), and the second coupling part (29) with a second drive member (35) is rotatably connected, which via a Chain (69), belt or shaft is coupled to the second pulley shaft (15) Embroidery machine according to claim 8, characterized in that the belt or the chain (69) as an endless belt resp. Endless chain is formed. Embroidery machine according to one of claims 8 or 9, characterized in that one of the coupling parts (27) or (29) mounted axially displaceably on the coupling shaft (39) and biased by spring means (37) in the coupling position. Embroidery machine according to one of claims 1 to 10, characterized in that at least on the drive means and / or at the ends of the fabric shafts (13) or (15) are provided attack means for a hand tool. Embroidery machine according to one of claims 1 to 11, characterized in that guide means are provided for the clamping frame to guide the clamping frame (11) in the x- and y-direction, and that drive means are provided which coupled to the clamping frame (11) are to move the clamping frame (11) in the x and y direction. Embroidery machine according to one of claims 1 to 12, characterized in that a clamping device (71) is provided with a plurality of spaced apart and pivotable clamping levers (77), which from a first stickgrundfernen position in a second, stickgrundnahe position are pivotable. Tentering frame for multi-head embroidery machine with two spaced fabric holding elements,
characterized,
that the fabric-retaining elements are designed as first and second freely rotatable fabric shafts (13,15) on which a supply of embroidery material (89) can be wound. Clamping frame according to claim 14 and one of claims 2 to 13.

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