KR101791112B1 - Multi-head embroidery machine and lower thread unit for a multi-head embroidery machine - Google Patents

Abstract

The multi-head embroidery machine has a plurality of embroidery heads arranged at a predetermined distance so as to be able to move laterally on the carrier rails. Each embroidery head has a plurality of needle positions, the main embroidery-producing members of the needle positions are thread readers, and the thread guide devices and the needle members arranged on the needle tappet are collectively referred to as the upper thread unit . During the embroidery process, the needle moves up and down, penetrating the pinhole of the needle plate. The lower thread unit 11 is associated with each embroidery head. The preferred general transmission 19 ensures simultaneous movement of the upper thread unit and the lower thread unit 11. Unlike conventional multi-head embroidery machines, the lower thread unit 11 is provided with a bobbin having a shuttle 31 for receiving a reciprocating carriage 17 instead of a string, winding a thread of approximately 250 m.

Description

[0001] MULTI-HEAD EMBROIDERY MACHINE AND LOWER THREAD UNIT FOR A MULTI-HEAD EMBROIDERY MACHINE [0002]

The present invention relates to a multi-head embroidery machine according to the preamble of claim 1 and a lower thread unit according to the preamble of claim 13.

According to Fachbuchverlag Leipzig, 1982, First Edition, by Friedrich Schoner and Klaus Freier, the embroidery machine is classified according to various criteria The first classification is based on the number of thread systems involved in the embroidery process: in some machines, the embroidery is produced by only one thread system, the other machines are two thread systems, That is, it requires another second bottom-thread, rear-thread, spool-thread, shuttle-thread, or bobbin thread.

The second classification is based on the number of simultaneous time zone needle operations: single needle embroidery machines include Singer, Adler and crank-actuated embroidery machines. Multi-needle or rapport embroideries are shuttle embroidery machines or hand embroidery machines.

In addition to these two groups, there is also a multi-head embroidering that does not belong to the above two groups. The principle of this machine is based on the fact that 3, 4, 6, 10 or 12 singer embroidery heads set to move by a common drive shaft are mounted on a large capacity platform. This requires simultaneous actuation of the heads, and all the needles simultaneously pass through or out of the embroidery ground. In this case, the embroidery grounds can be individually secured to the embroidery frame for each head. These embroidery frames are fixed by a bolt connection to a creel-like structure and are controlled in a horizontal plane by a small computer. In the case of an automatic embroidery machine with six heads, the embroidery area is approximately 240 x 200 mm. Embroidery - Creating Elements and Embroidery - The creation process is the same as the singer embroidery. The only difference is that a fabric press is provided on each needle and securely secures the embroidery ground during the embroidery process. The fabric presser is always lifted whenever an additional displacement occurs in the embroidery frame. Furthermore, individual embroidery heads are usually provided with the thread detection system, and automatically switch off the device when a thread failure occurs.

The first multi-head embroideries have already been sold 100 years ago at a Singer sewing machine factory in Germany (see " Embroidery Technology ", Coleman, Schneider, 1991). The first automatic multi-head embroidery machine was introduced to the market in 1927 (also known as the Wurker-Automat). Further consideration of the literature refers to the general textbook "Techniques and production engineering ", Klaus Fryer, VEB Fakhuberk, Life Jig, pages 130 and 131.

The present invention relates to the aforementioned multi-head embroidery machines, wherein each embroidery head is provided with a plurality of needle positions. More distin- guishably, these multi-head embroidery machines are also referred to in the following description as multi-head multi-needle embroidery machines. Generally, each needle position includes stitch-compensating thread tension portions for needles and upper threads arranged on a needle tappet designed to be moved up and down and driven by a drive unit A thread detector (optional), a thread leader (also referred to in the literature as a thread take-up lever), and thread guide devices. In the foregoing discussion, the embroidery-generating elements are also collectively referred to as the upper thread unit. The embroidery heads of the multi-head embroidery machines are arranged to be able to move laterally on a support arm. The bottom of each embroidery head is a needle plate, forming a position of embroidery in position, and a pinhole is provided for the needle. Each needle of the embroidery head can move along the side to the embroidery position and, during operation, the embroidery fabric is placed tightly on the frame, which can be displaced in either the x-direction or the y-direction. During the movement of the needle, the needle located at the embroidery position passes through the embroidery fabric and through the pinhole. An upper thread is provided through the embroidery fabric and a loop is formed on the back side of the embroidery fabric by corresponding needle movement. Next, the underlying thread is provided through this loop. As the needle returns, the upper thread becomes taut, so-called needle sweat is formed in the embroidery fabric. During the embroidery process, only one of the needle positions in each case is valid, i.e., the needle position is placed at the embroidery position. The embroidery heads of the mentioned multi-head embroideries are arranged in a "rapport" along the support arm in a known manner.

Thus, a feature of these multi-head multi-needle embroidery machines is that each embroidery head has a plurality of needle positions. This has the advantage that each needle position is provided with another thread, so that the multi-color embroidery can be performed only by the corresponding needle set to always move.

Needle tappets and thread levers, a group of needles associated therewith, are usually mounted on a carrier, which causes the selected tappet and associated thread lever selected to change the thread as a result of the displacement to be stopped, .

A conventional multi-head multi-needle embroidery machine is illustrated by way of example in Figs. This includes a rack 201, an embroidery platform 203 arranged on the rack 201 and a plurality of embroidery heads 205 arranged in a row on the embroidery platform. As shown in FIG. 2, each embroidery head 205 has a plurality of needle positions, each of which is provided with a needle 215. Whereby all of the embroidery positions are blocked by the stationary thread guide members 207 or thread brakes, the vertically movable thread restraining lever or thread reader 209, the thread reversal parts 211, And a needle 215 arranged on the needle bar 213 together with the tappet 214. [ Further, as shown in FIG. 2, each needle tappet 214 is provided with a fabric presser 217. The embroidery frames 219, to which the embroidery ground is fixed to be embroidered, are provided below the embroidery heads 205. The embroidery frames 219 can be inserted into the large capacity clamping frame 221, which extends across the width of the embroidery platform 203. The clamping frame 221 can move in the x-direction and the y-direction in a known manner. As mentioned above, the embroidery heads are arranged on the linear guide 223 and can move in the x-direction therealong.

In conventional multi-head multi-needle embroidery machines, the lower thread for the embroidery head in each case is housed in a housing and provided by a string provided in a conventional sewing machine. The thread can be wound up to 100m in the string. As a result, for multi-head embroideries, the blanks are replaced relatively frequently. If the threading is complete, the machine should be stopped and the blanks replaced.

Conventional shuttle embroideries include a number of embroidered positions arranged transversely, as well as many needles and shuttles. Unlike the stringers, the shuttles have the advantage that the bobbin can be accommodated within the shuttle, with threads up to approximately 250 meters. A drive beam extending over the entire length of the shuttle embroidery allows the shuttles to move back and forth. A lower drive pin and an upper drive pin, between which the shuttle is disposed, are provided to the drive beam for each shuttle. With these drive pins, the shuttle moves back and forth within the shuttle track. The shuttle embroideries are disclosed, for example, in European Patent Publication Nos. EP 1 881 098, EP 1 595 990, EP 1 495 174 and DE 286 479. In such shuttle embroideries, it is common for the drive beam to move in a reciprocating manner by the transmission. This is advantageous in that only one transmission is required for a plurality of embroidery positions. In order to provide as high an embroidery speed as possible, EP 1 595 990 proposes coupling with a drive shaft by means of a plurality of crank gears arranged at a predetermined distance from each other. As a result, it can cope with any deformation of the drive beam at a very high embroidery speed. The disadvantage of the shuttle embroidery machines is that they are expensive to produce.

It is an object of the present invention to propose a multi-head embroidery machine which does not have the aforementioned disadvantages. In particular, it is an object of the present invention to provide a multi-head embroidery machine with high efficiency characteristics as compared to conventional machines. The present invention provides a machine in which lower threads are replaced less frequently. Another object of the present invention is to design a machine that is easy to operate.

The present invention relates to a multi-head embroidery machine. This includes at least one embroidery head having a plurality of needle positions. The needle positions may be arranged on the platform or carrier and displaced in the x-direction, i.e., laterally, relative to the embroidery position. Each needle position includes members such as thread readers, thread guide devices, and a needle tappet, and in each case a needle can be attached. Needle tappets can move back and forth along the z-direction. In addition, the above-mentioned members, collectively, are referred to as upper thread units. The lower thread unit is connected to each embroidery head. The clamping frame is arranged between the upper thread unit and the lower thread unit to stenter the embroidery ground. The clamping frame has two first and second fabric fastening members arranged spaced apart from each other in the y-direction. As is well known, the multi-head embroidery machines have a transmission, for example with a central drive shaft, to simultaneously drive the upper and lower thread units.

An object according to the present invention is to achieve an embroidery machine according to the preamble of claim 1, wherein the lower thread unit has a shuttle guide device for guiding the shuttle and a transmission for driving the shuttle guide device. The drive allows the shuttle to move back and forth while the embroidery is running. Each drive is directly coupled to only one shuttle or shuttle holder. In this case, the shuttle guide device is implemented as a single shuttle guide. However, unlike shuttle embroideries, in the case of the embroidery machine of the present invention, drive beams are not provided with the driver pins, but instead individual transmissions are provided for each shuttle. There is an advantage that a much smaller mass is transferred compared to conventional shuttle embroideries. The operation of the drives for shuttles can be done simultaneously by a continuous shaft. Using a shuttle instead of a string in the case of a multi-head embroidery has the main advantage that the thread can be supplied up to 250 m instead of about 100 m. As a result of the new embroidery, the lower thread can be replaced much less frequently. Another advantage is that already known shuttles can be used for large capacity embroidery machines.

Preferably, the shuttle guide device includes a carriage arranged to be able to move along the guide device to receive the shuttle, each carriage connected to a transmission. The carriage can be accurately guided and drives the shuttle. For convenience, a rotatable drive coupled to the transmission is provided. The transmission is preferably designed to convert rotational motion of the drive shaft into reciprocating motion of the shuttle. Other types of transmissions are known that convert rotational motion to translational motion. Particular mention is made of combination gears and cam gears. All of these transmissions are suitable for use in creative embroidery machines.

In a preferred embodiment, the shuttle guide device is arranged on the mounting frame and includes a carriage arranged to be movable on the carriage guide device to receive the shuttle. This carriage is coupled with the transmission so that the shuttle track can move back and forth in a plane that is substantially parallel to the needle plane (and therefore, embroidery ground) and perpendicular to the direction of needle movement. Such a unit can be produced economically and provides a high rotational speed.

There is advantageously provided a motion conversion mechanism for converting the rotational motion of the drive shaft into the reciprocal motion of the carriage. Those skilled in the art will be familiar with various methods of converting rotational motion into linear velocity (axial) motion. In a preferred first embodiment, the reciprocating movement of the shuttle or the reciprocating movement of the carriage which fixes the shuttle is provided by a cam disc or cam gear which is directly or indirectly connected to the drive shaft. These drives can be in various forms and are known to those skilled in the art. In a second preferred embodiment, the reciprocating movement of the shuttle or the reciprocating movement of the carriage securing the shuttle is provided by the couple gears connected to the drive shaft. Coupled gears with eccentric cam members have the advantage that the carriage can be guided without play.

For example, a return movement of the carriage caused by a cam disc or lever mechanism in combination with a crank mechanism and a spring member connected to a carriage or a portion engaged with the carriage provides for a one-way shuttle movement through the transmission Can be assumed. Thus, in an alternative embodiment, the transmission drives the shuttle against the force of the spring causing a return movement. Such a transmission can be configured relatively simply and is very economical. However, preferably, the back and forth movement of the carriage is caused by the cam disk drive.

In a preferred embodiment, the transmission has a rocker arm pivotable about an axis of rotation, a load connection shuttle, and a first end of the shuttle connected to the rocker arm. The second end of the load connection shuttle is preferably connected to the carriage. Additionally, in particular, a crank mechanism or crank gear is provided which is connected to the rocker arm to move the rocker arm back and forth during the embroidery process. Preferably, the device is formed by a first gear wheel constrained to the main drive shaft, a second gear wheel arranged on the mounting frame and rotatable about a rotational axis and meshing with the teeth of the first gear wheel, The first end of the connecting rod is connected to the second gear wheel and the second end of the connecting rod is connected to the rocker arm. The transmission formed in this way provides a guide of the carriage without operation and provides a high rotational speed in operation of the embroidery machine.

Preferably, the shuttle guide device is a linear guide having at least one guide member that moves in a straight line, and on the guide member, a carriage for accommodating the shuttle is displaceably arranged. The linear guide is less troublesome, has a long service life, and can be produced economically. For precise guidance of the carriage, the shuttle guide device preferably has two parallel guide devices, with guide rods arranged thereon spaced apart from one another so that the carriages can be arranged and moved.

In a preferred embodiment, the shuttle guide device is arranged on the mounting frame and pivotable about a pivot axis, and can be pivoted from the operating position to the open position. This has the advantage that the shuttle can be easily accessed whenever it needs to be replaced. Preferably, a locking means is provided to restrain the carriage guide device in the operative position.

For convenience, a shuttle guide device, a transmission, and preferably a main drive shaft are arranged on the mounting frame. In this case, the mounting frame may be disposed on the main drive shaft which simultaneously drives the plurality of lower thread units. The mounting frame has pits with mounting holes for attaching feet to the substrate in a carrier extending over the entire length of the machine to which the table is bound. Preferably, the plurality of upper thread units (or embroidery heads) and associated lower thread units are arranged on the rack. At the same time, the lower thread units, each located on a respective mounting frame, are arranged at a predetermined distance from the embroidery heads on the embroidery rack. Preferably, one or more clamping frames arranged to move in the x-direction and the y-direction between the upper thread unit and the lower thread unit are provided for clamping the embroidery fibers. The clamping frame is known to those skilled in the art of conventional multi-head multi-needle embroidery machines.

Preferably, the rocker arm is arranged on the clamping block and pivotable about a rotational axis, the clamping block being constrained to the rotating shaft. The arrangement has the possibility that the shuttle can move further due to the movement of the rocker, for example, the shuttle can move independently of the movement of the main drive shaft. This, on the other hand, allows the shuttle to move out of phase, or allows the shuttle to move even if the main drive is stopped.

The subject of the present invention is a multi-head multi-needle embroidery machine,

A mounting frame in which the shuttle guide device is preferably arranged,

A carriage arranged on the shuttle guide apparatus and movable on the shuttle guide apparatus to receive the shuttle,

And a transmission coupled to the carriage to create a reciprocating movement of the shuttle during the embroidery process and arranged on the mounting frame. The lower thread units may be combined with corresponding upper thread units to form multi-head multi-needle embroidery machines of different sizes. In this case, a typical main drive shaft drives a plurality of lower and upper thread units. Preferred embodiments of the hub thread units are defined in the dependent claims and have already been mentioned in detail above. Exemplary embodiments of the present invention are described below with reference to the drawings.

1 is a perspective view of a conventional multi-head multi-needle embroidery machine having a plurality of embroidery heads.
Figure 2 is a front view of an individual embroidery head of a known multi-head multi-needle embroidery machine having a plurality of needle positions.
3 is a perspective view of a novel multi-head multi-needle embroidery lower thread unit having a carriage guide device for a carriage arranged on a mounting frame according to the invention, a carriage and a transmission for moving the carriage.
Figure 4 is a side view of the lower thread unit of Figure 3 with the carriage in its maximum retracted position.
Figure 5 is a view of the lower thread unit in Figure 4 with the carriage in an intermediate position.
Figure 6 is a view of the lower thread unit in Figure 4 with the carriage in its fully advanced position;
Figure 7 is a view of the lower thread unit in Figure 4 in which the carriage is in an intermediate position while being retracted from its maximum advance position.
Figure 8 is a view of the lower thread unit in Figure 4 in which the carriage guide device is pivoted downward towards the open position.
9 is a view schematically showing another embodiment of a shuttle transmission having an eccentric disc.

The lower thread unit 11 of the multi-head multi-needle embroidery machine shown in Figs. 3 to 8 is provided with a mounting frame 13 on which a shuttle guide device 15 having a carriage 17 movable forward and rearward, And a transmission 19 actively connected to the carriage 17 to generate movement. The shuttle guide device 15 is preferably a linear guide formed by two guide rods 21 and the linear guides are arranged on the mounting frame 13. [ The guide rods 21 are arranged at a predetermined distance and are parallel to each other between the front plate 23 and the mounting block 25. [ The mounting block 25 is connected to the mounting plate 13 and is pivotable about a rotational axis 27.

The carriage 17 is guided to move linearly on the guide rods 21. A holder 29 is formed on the carriage 17 for the shuttle 31 and a bobbin having a lower thread can be inserted. The shuttle 31 is preferably identical to the shuttles used in known large capacity shuttle embroideries.

The transmission 19 that creates the reciprocating movement of the carriage 17 preferably includes a rocker arm 35 pivotable about a rotational axis 33, a shuttle connecting rod 37, a shuttle connecting rod 37 connected to the rocker arm 35, A second end of the shuttle connecting rod 37 connected to the carriage 17, a connecting rod 39, a first end of the connecting rod 39 connected to the gear wheel 41, And a second end contacting substantially in the center of the rocker arm 39. The teeth of the gear wheel 41 are engaged with the teeth of the drive gear wheel 43 constrained to the drive shaft 45. [ The drive shaft 45 extends over the entire width of the new multi-head multi-needle embroidery machine and simultaneously drives shuttles of a plurality of lower thread units (not shown).

The gear wheel 41 is mounted and freely rotates on the mounting frame 13 with respect to the rotary shaft 47. [ The eccentric cam gear is guided by the connecting rod 39 connected to the pin 49 by the pin 49. When the gear wheel 41 rotates through the eccentric cam gear, the rocker arm 35 and the carriage 17 are guided to move back and forth, ), And is rotatable on the gear wheel. The carriage movement is preferably accomplished simultaneously with the needle movement of the upper thread unit not shown in the figures by the drive shaft 45.

In the preferred embodiment shown, the carriage guide device 15 is arranged on the mounting frame 13 and is pivotable about a pivot axis 27, so that the shuttle guide essentially moves parallel to the needle plate 51 From the operating position, the carriage guide device 15 can be rotated to an open position that rotates away from the needle plate 51. An axially movable locking pin 57 is provided on the extension 53 by a spring 55 to restrain the carriage guide device 15 in the open position. The pin 57 can be brought into contact with the concave portion 59 every time the carriage guide device 15 is rotated toward the needle plate 51. The concave portion 59 is provided on the rectangular guide piece 61 located on the mounting frame 13. [ The protrusions 63 provided at the opposite ends of the guide part 61 restrict the movement of the rotatable carriage guide device 15. [ At the open position of the carriage guide mover 15, the shuttle 31 is easily accessible from the outside and can be stably replaced.

The pits 65 are formed or bound on the mounting frame 13 to arrange the lower thread units 11 on a rack not shown in detail. Preferably, the rack is a table rack as is known in multi-head multi-needle embroidery machines. However, it may also be assumed that the shuttle is vertically moved up and down by mounting the lower thread unit on a vertical substrate. To this end, the fabric must turn from horizontal to vertical position, such as a needle, perpendicular to the fabric. The circular holes 67 are provided in the pits 65 so that the lower thread units can be bolted to the rack. The needle plate 51 is arranged on the mounting frame 13. The pinhole 69 is provided in the needle plate 51 through which the needle located in the embroidery position (not shown) of the multi-needle embroidery head can penetrate in each case.

In the preferred embodiment of the lower threaded unit shown in the figures, the rocker arm 35 is rotatably arranged on the axle 68 which is part of the clamping component 70. The clamping component 70 is bound to a rotatable shaft 72 which is rotatable between two extreme positions. The pivoting possibility of the rocker arm 35 provides the advantage that the carriage 17 can move independently of the drive due to the rotary shaft 72. [ Increasing the degree of freedom in this movement makes it possible, for example, to relocate the needle thread during shuttle transfer or embroidery, which changes during boring.

Figure 9 shows a further possible embodiment of a transmission generating a shuttle movement. The transmission includes a lever 71 pivotable about a stop lever bearing 73. Whereby the first arm 75 interacts with the first eccentric cam or cam disk 77 and the second arm 79 interacts with the second eccentric cam or cam disk 81. [ When the eccentric discs 77 and 81 rotate about the center of the rotation 83, the lever 71 capable of driving the shuttle carriage moves back and forth. Instead of using double-arm levers and two eccentric discs, a single lever 84 and a spring 85 may be used to create a return movement (FIG. 10).

The multi-head multi-needle embroidery machine has a plurality of embroidery heads arranged at a predetermined distance and movable sideways on the carrier rails. Each embroidery head has a plurality of needle positions at a constant distance from each other, major embroidery-generating elements of the threadreader, thread guide devices, and needles arranged on the needle tappet. These members in the present application are collectively referred to as upper thread units. During the process, the needle moves up and down, passing through the pinhole of the needle plate where the embroidery ground is located. A lower thread unit located below or behind the needle plate is associated with each embroidery head. A preferred general transmission allows simultaneous movement of the upper thread unit and the lower thread unit. Unlike conventional multi-head multi-needle embroidery machines, a lower thread unit instead of a stringer has a shuttle in a bobbin having a thread of about 250 meters.

11: Lower thread unit 13: Mounting frame
15: carrier guide device 17: carriage
19: Transmission 21: Guide rod
23: front plate 25: mounting block
27: rotation axis of mounting block 29: holder
31: shuttle 33: rotation axis of rocker arm
35: Rocker arm 37: Shuttle connection rod
39: connecting rod 41: gear wheel
43: drive gear wheel 45: drive shaft
47: the rotation axis of the gear wheel 41
49: a pin for attaching the connecting rod with the gear wheel 41
51: needle plate 53: extension part
55: spring 57: locking pin
59: recess 61: guide part
63: protrusion on the guide part 65:
67: In-pit hole 68 of mounting frame: Axle for connecting rod 39
69: Pin hole 70: Clamp part
71: Lever
72: shaft for rotating connection rod 39
73: Lever 71 of the lever 71
75, 79: the first and second arms of the lever 71
77, 81: first and second eccentric cams or cam discs
83: center of rotation of the eccentric disc 84: single lever
85: spring

Claims (17)

And at least one embroidery head having a plurality of needle positions arranged to move in the displacement direction with respect to the embroidery position,
The lower thread unit 11 is connected to the embroidery head,
The lower thread unit 11 has a shuttle guide device 15 for guiding the shuttle 31 and a separate transmission 19 for driving the respective shuttle guide devices,
The shuttle guide device 15 comprises a carriage 17 arranged to be movable along a guide device 21 for receiving a shuttle 31,
There is provided a rotatable drive shaft 45 connected to the transmission 19 and designed to convert the rotational movement of the drive shaft 45 into the reciprocal movement of the shuttle,
The transmission 19 includes a rocker arm 35 pivotable about a rotational axis, a shuttle connecting rod 37, a first end of a shuttle connecting rod 37 connected to the rocker arm 35, 17. The multi-head embroidery machine as claimed in claim 16, wherein the second end of the shuttle connecting rod (37) The multi-head embroidery machine according to claim 1, wherein the transmission (19) is coupled to a gear or a cam gear. 3. Multi-head embroidery machine according to claim 1 or 2, characterized in that the shuttle guide device (15) and the transmission are arranged on a mounting frame (13). The multi-head embroidery machine according to claim 1, characterized in that a device is provided which is connected to the rocker arm (35) to move the rocker arm (35) back and forth during the embroidery process. 2. The device according to claim 1, characterized in that it comprises a first gear wheel (43) coupled to a main drive shaft (45), a second gear wheel A second gear wheel 41 arranged on the frame 13, a connecting rod 39, a first end of a connecting rod 39 connected to the second gear wheel 41, a rocker arm 35, And a second end of a connecting rod (39) connected to the second end of the multi-head embroidery machine. The shuttle guide device (15) according to claim 1, wherein the shuttle guide device (15) is a linear guide in which one or more guide members (21) extend linearly and the guide member (21) and the carriage 31). ≪ RTI ID = 0.0 > 31. < / RTI > The multi-head embroidery machine according to claim 6, characterized in that the shuttle guide device (15) is arranged on the mounting frame (13) and is pivotable about a pivot axis (27) and is pivotable from an operating position to an open position. The apparatus of claim 1, wherein a plurality of embroidery heads and a corresponding number of lower thread units associated therewith are arranged on the rack and are movable between an upper thread unit and a lower thread unit in the x- and y-directions on the embroidery rack Characterized in that at least one clamping frame is provided for tensioning the embroidery fibers arranged so as to stretch the embroidery fibers. The multi-head embroidery machine according to claim 1, characterized in that the rocker arm (35) is arranged on the clamping part (70) and is pivotable about a rotation axis, the clamping part (70) being fastened to a rotating shaft. 2. A method as claimed in claim 1, characterized in that the movement of the carriage (17) in one direction is caused by the transmission and the movement of the carriage (17) And a spring connected to the multi-head embroidery machine. A lower thread unit (11) for a multi-head embroidery machine,
A mounting frame 13 on which a shuttle guide device 15 is arranged;
A carriage (17) arranged to be movable on a shuttle guide device (15) for receiving the shuttle (31);
A coupling gear or cam gear transmission arranged on a mounting frame (13) coupled with the carriage (17) to create a reciprocating movement of the shuttle (31) during the embroidery process; And
And a separate transmission (19) for each shuttle guide device (15)
Wherein the shuttle guide device (15) is arranged on the mounting frame (13) and pivotable with respect to the rotary shaft (27) and is pivotable from an operative position to an open position or from an open position to an operative position. delete delete delete delete delete delete

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