TWI589749B - Multi-head embroidery machine and lower thread unit for a multi-head embroidery machine - Google Patents

Description

Multi-head embroidery machine and lower line unit for multi-head embroidery machine

The present invention relates to a multi-head embroidery machine of the first application of the patent scope and a lower-line unit of the citation of claim 13 of the patent application.

According to Friedrich Schoner and Klaus Freier's book "Embroidery Technology" (VEB) technical book publisher, Leipzig, 1982, 1st edition), embroidery machines can be classified according to different viewpoints: the first major category is related to the thread system of the embroidery head program. Number: In some machines, embroidery is only produced by a one-line system, while other machines require two line systems, that is, a second lower line (back line, small line axis, shuttle or bobbin).

The second largest category of needles for simultaneous operation: single-line embroidery machines with Singer, Adler and crank embroidery machines. The multi-line or proportional embroidery machine (Rapportstiokmaschino) is a shuttle embroidery machine and a hand embroidery machine.

In addition to these two groups, there are also multi-head embroidery machines, which are not in the above two groups. The principle of this machine is to install 3, 4, 6, 10 or 12 Singer embroidery heads onto a large platen. These embroidery heads are driven by a common drive shaft. It is necessary for the synchronized operation of the head thus achieved to cause all the needles to be simultaneously inserted into the embroidery base fabric or simultaneously from the embroidery base fabric. Here, for each head, the embroidery base fabric can be individually sandwiched in an embroidery frame. These embroidery frames are fixed by screws to a structure like a creel, which is controlled in the horizontal plane by a small automatic device (robot) "Automat". In an embroidery robot with six heads, the embroidery field (area) is approximately 240 x 240 mm. The components forming the embroidery and the procedure for forming the embroidery are the same as those of the Singer embroidery machine. The only difference from the latter is that there is also a presser on each needle that holds the embroidered base fabric firmly when the embroidery is formed. If the embroidery frame moves further, the presser tends to rise. In addition, individual embroidery heads typically have a line monitoring system that automatically turns off the machine when the line is broken.

The first batch of multi-head embroidery machines was sold by De Singer Sewing Machine Factory 100 years ago (see The Art of Embroidery, Coleman, Schneider, 1991). The first automatic multi-head embroidery machine was launched in 1927 (also known as "Wnrker-Automat"). For further literature, see the general textbook "Technology and Production Engineering" Klaus Freier, VEB Science and Technology Publishing House, Leipzig, 130-131).

The present invention relates to the above-described multi-head embroidery sewing machine in which each of the embroidery heads is provided with a plurality of needles, and the multi-head embroidery sewing machine is also referred to as a "multi-head multi-needle embroidery machine" for the sake of clearer distinction in the following description. Here, in general, each needle position has a line monitor (optional), a wire guide (also referred to as a wire take-up bar in the literature), and a wire guiding device, including a wire tensioning position for compensating the stitches. (for upper thread), and a needle on a needle pusher that can be moved up and driven by a drive unit. The above-described elements forming the stitches are also referred to as "online unit" as a whole in the specification. The embroidery head of the multi-head embroidery machine is supported on a support arm and can be moved laterally. Below each embroidery, there is a stitch board (needle board) in which a pinhole is provided for insertion of a needle, and the stitch board defines the position of the embroidery or the stitch. Each of the needles of an embroidery head can move laterally to the embroidery position, and in operation, the embroidery base fabric (which is stretched on a tenter movable in the x direction and the y direction) rests on the stitch position . The needles located at the stitch positions pass through the embroidery base fabric into the needle holes as the needle moves. Here, the upper thread passes through the embroidered base fabric and a loop is formed on the back side of the embroidered base fabric by the associated needle movement. Then go offline through this loop. When the needle is pulled back, the upper thread is pulled and a so-called stitch (stitch, stitch) is formed in the embroidery base fabric (Stich, English: stitch). When embroidering, only one of these needle positions is active. That is, at the position of the needle at the position, the embroidery head of the above-described multi-head embroidery machine is set at a specific ratio by a conventional method.

Therefore, one of the characteristics of these multi-head embroidery sewing machines is that each embroidery head has a plurality of needle positions. This has the advantage that another line can be placed at each needle position, so that Buntstickerei can be used, and often only the relevant needle is in motion.

Needle set of a needle set (Nadelst Each of its associated push rods is typically supported in a carrier which, by movement, carries the selected needle bar and its associated wire rod in front of a positionally fixed drive to replace the wire.

For example, a conventional multi-needle embroidery sewing machine is shown in FIGS. 1 and 2. It includes a frame (201), an embroidery table (203) disposed on the frame (201), and a plurality of embroidery heads (205) (which are arranged in series above the embroidery table). As shown in Fig. 2, each embroidery head (205) has a plurality of needle positions each having a needle (215). The needle positions here comprise a fixed line guide element (207) or a line brake. An up and down line take-up lever or wire guide (209), and a wire steering member (211), and a needle (205) [the needle is provided with a needle (213) having a needle pusher (214) on]. As shown in Fig. 2, each needle pusher (214) is provided with a presser (217), and an embroidery frame (209) is arranged under the embroidery head (205), and the embroidery base fabric to be embroidered can be stretched on the embroidery. In the box. The embroidery frame (219) can be placed in a large clamping frame (221) which extends over the width of the embroidery table (203). The embroidery frame (221) can be moved in the x and y directions by conventional means. As described above, the embroidery head is disposed on a linear guide (223) and is movable along the guide in the x direction.

In the case of a conventional multi-head multi-needle embroidery machine, the lower thread of the embroidery head is each provided by a small spool (Spulchen) which is housed in a casing, as used in various conventional sewing machines. A wire of up to 100 meters can be wound on a small spool. This will make it necessary to replace the spool more frequently in the case of a multi-head sewing machine. If the line reserve is exhausted and the small spool is to be replaced.

The conventional shuttle embroidery machine includes a plurality of embroidery positions arranged in a row, and the same number of needles and shuttles. Unlike a small bobbin, the shuttle has the advantage that it can hold a majority of bobbins in the shuttle, and the bobbin has a line of up to about 250 meters. There is a drive for reciprocating the shuttle, and the drive beam (Treiberbalhen) extends over the full length of the shuttle embroidery machine. For each shuttle, a driving nail and an upper driving nail are arranged in the driving, and a shuttle is arranged between the upper and lower driving nails. With these drive pins, the shuttle moves up and down in the so-called Stockli shuttle track. Examples of such shuttle embroidery machines are disclosed in EP-A 1 881 098, EP-A-1 595 990, EP-A-1 495 174 and DE 286 479. These shuttle embroidery machines have in common that the drive beam is reciprocated by a coupler. This has the advantage that most embroidery positions require only a single coupler. In order to be able to achieve higher embroidery speeds, EP-A-1 595 990 claims to couple the drive shaft with a plurality of crank couplings arranged at a distance, so that at high embroidery speeds, the drive beam can be prevented from deforming. A disadvantage of the above embroidery machines is that they are expensive to manufacture.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-head embroidery sewing machine which has the above disadvantages. In particular, it aims to provide a multi-head embroidery sewing machine which is more efficient than conventional machines. The purpose is to provide a machine in which the lower line is less frequently replaced. Yet another object of the present invention is to provide a machine that is easy to operate.

The present invention relates to a multi-head embroidery sewing machine. It has at least one embroidery head and a large number of embroidery. The needle position is placed on a carrier or a carrier and is movable in the x direction (i.e., laterally) relative to an embroidery position. Each needle position contains a number of components (such as a wire guide, a wire guide) and a needle pusher (on which a needle can be attached). The needle pusher moves back and forth along the z direction. The above components are also referred to as the upper line unit as a whole. Each of the lower line units cooperates with each embroidery head. A tenter is arranged between the upper unit and the lower unit to open an embroidered base fabric. The tenter has two (first and second) cloth retaining elements that are spaced apart from one another in the y-direction. As is generally known, a multi-head embroidery machine has an actuator, for example having a central drive shaft for synchronously driving the upper and lower units.

According to the invention, an embroidery machine according to the citation of item 1 of the patent application scope is achieved by the fact that the lower thread unit has a shuttle guiding device for guiding a shuttle and having a coupling to The drive of the shuttle guide is coupled. When the embroidery machine is in operation, the drive is used to move the shuttle back and forth, where each drive is directly connected to only one shuttle or shuttle receptacle. The shuttle guide is here formed as a single shuttle guide. However, unlike the shuttle embroidery machine, the embroidery machine of the present invention does not have a drive beam having a drive pin, but is provided with a linker for each shuttle. Compared with the traditional shuttle embroidery machine, the advantage is that the quality of the part to be exercised is much less. The shuttle point drive can be driven with a consistent line of axes. Therefore, in the new embroidery machine, the frequency of the downline replacement is much less. Another advantage is that shuttles that are conventionally known in large embroidery machines can be used.

The shuttle guiding device preferably includes a carriage configured to move along a guiding member to accommodate a shuttle, and the carriage is coupled to the coupling. This carriage can be accurately guided and used to drive the shuttle. An advantageous way is to provide a rotatable shaft that is coupled to the coupler; the coupler is preferably designed to convert the rotational motion of the drive shaft into a reciprocating motion of the shuttle. Various different actuator variants are known to turn rotational motion into mobile motion. Specifically described herein are coupling couplers (coupling transmissions) and curve couplers (Kurvengetriebe), both of which are suitable for use in the embroidery machine of the present invention.

According to a preferred embodiment, the shuttle guiding device is disposed on a mounting frame (Motagerahmen), and has a carriage movably disposed on the carriage guiding device to accommodate a shuttle. The carriage is coupled to the guide such that the shuttle track reciprocates in a plane that extends generally parallel to the stitch plate and the embroidery backing and perpendicular to the direction of movement of the needle. Such a unit can be manufactured inexpensively and can achieve high rotational speeds.

An advantageous way is to provide a motion conversion mechanism that converts the rotational motion of the drive shaft into a reciprocating motion of the carriage. Experts know that there are many different variants that can be used to bend a rotary motion into a moving (axial) motion. According to a preferred variant, the reciprocating motion of the shuttle (or the carriage that houses the shuttle) utilizes a direct or indirect drive shaft. A connected cam or curved coupler is produced. These drivers can be designed differently and are known to the expert. According to a second variant, the reciprocating movement of the shuttle (or the carriage holding the shuttle) is produced by means of a coupling coupler connected to the drive shaft. An advantage of a coupling coupler with an eccentric element is that the carriage can be guided without a gap-free (spielfrei).

It is also conceivable that the movement of the carriage in one direction is achieved by means of a coupling (for example a combination of a cam or a lever mechanism and a cranking means), and the return movement of the carriage is achieved by means of a spring which is connected to the carriage or Connected to a part that is coupled to the carriage. In this variant, the coupler drives the shuttle against the force of the spring means (which acts as a return movement). The design of such a coupler is relatively simple and correspondingly inexpensive, however, the forward and backward movement of the carriage is preferably achieved with a cam coupler.

In a preferred embodiment, the coupler has a swinging plate (Schwinghebel) that pivots about a rotational axis and a shuttle link (the first end of which is pivotally attached to the swing link). The second end of the shuttle link should be pivotally connected to the carriage.

Furthermore, a reciprocating device, in particular a crank oscillating member or a crank drive, is provided which is coupled to the pendulum rod for reciprocating the pendulum rod during the embroidery operation. Preferably, the reciprocating device is composed of a first gear, a second gear and a connecting rod. The first gear is disposed on the driving shaft in a non-rotatable manner, and the second gear is meshed into the teeth of a first gear and It is arranged on the mounting frame to rotate about a rotating shaft. The first end of the connecting rod is pivotally connected to the second gear, and the second end of the connecting rod is pivotally connected to the swinging rod. The designed coupling enables the carriage to be guided without a gap when the embroidery machine is operated, and High speed. Preferably, the shuttle guide is a linear guide, at least a linearly extending guide element on which the carriage is movably mounted to accommodate the shuttle. Such linear guides are less prone to failure, have a long service life, and are inexpensive to install. In order to guide the carriage accurately, the shuttle guiding device preferably has two spaced apart guiding elements, preferably a guiding rod, on which the carriage is movably mounted.

In an advantageous embodiment of the shuttle guide, the carriage guide is disposed on the mounting frame and pivotable about a pivot axis and pivotable from an operative position to an open position. This has one advantage: if the shuttle is to be replaced, it is easy to find (zug Uglich, English: accessible, and should be provided with a fixed means to fix the carriage guide in the operating position.

The shuttle guide, the coupler and the main drive shaft are preferably arranged on the mounting frame. Here, the mounting frame can be placed on the main drive shaft. Most of the offline units are driven when the main drive is the same. The mounting device can have a foot with a mounting hole for securing it to a base, particularly a carrier, which extends over the entire length of the machine to which the table is also secured. We should set up most of the online units and their associated offline units in a rack. Here, the lower thread units (which are each arranged on a separate mounting frame) are spaced apart on the embroidery machine, the spacing being the distance of the embroidery head. In addition, at least one tenter should be provided to stretch the embroidery.

The swinging rod is preferably disposed on a clamping block and is pivotable about a rotating shaft, and the clamping block is coupled to a pivoting shaft in a manner that is not rotatable relative to each other. The advantage of this arrangement is that the shuttle can be used for other movements because the swing lever is movable, for example, the shuttle can be independently moved without being affected by the movement of the main drive shaft of the shuttle. For example, this can cause the shuttle to move in phase or to move the shuttle when the spindle drive is not moving.

Another object of the present invention is a lower-line unit of a multi-head embroidery machine having a mounting frame, and a shuttle guiding device is provided with a carriage on which the shuttle guiding device is movably arranged for accommodating the shuttle on the mounting frame. The coupler is coupled to the carriage to cause the shuttle to reciprocate during the embroidery operation. This lower line unit can be combined with the associated upper line unit into a multi-needle embroidery machine of different sizes. Here, a (preferably common) main drive shaft drives most of the lower and upper units. An advantageous embodiment of such a downline unit is found in the scope of the patent application and has been discussed above.

The embodiments of the present invention are described below in conjunction with the drawings.

The lower wire unit (11) of the multi-head multi-needle sewing machine shown in Figs. 3 to 8 comprises a mounting frame (13) on which a shuttle guiding device (15) having a reciprocable carriage (17) is provided. And includes a coupler (19) operatively coupled to the carriage (17) to produce a reciprocating motion. The shuttle guiding device (15) is preferably a linear guide formed by two lead pins (21) which are provided on the mounting frame (13). The guiding rod (21) is arranged in parallel at a distance between the one end side plate (23) and one mounting block (25). The mounting block (25) is pivotally mounted on the mounting plate (13) for pivoting about a rotating shaft (27).

The carriage (17) performs a linear guide motion on the guide bar (21). A receiving portion (29) is formed on the carriage (17) to accommodate the shuttle (31), and a bobbin having a lower thread can be placed in the housing. The shuttle (31) should be the same as the shuttle used in the conventional large shuttle embroidery machine.

The coupler (19) for generating the reciprocating motion of the carriage (17) is preferably a swing lever (35) [which can pivot about a rotary shaft (33)], a shuttle link (37) [its first The end is pivotally connected to the swinging rod (35), the second end is pivotally connected to the carriage (17), and a connecting rod (39) [the first end of which is embedded in a gear (41), and the second end thereof Approximate to the center of the swing lever (39), where the teeth of the gear (41) are engaged in the teeth of a "drive gear" (43), and the drive gear (45) is disposed in a non-rotatable manner on a drive shaft (45) Upper. The drive shaft (45) extends over the entire width of the new multi-head multi-needle embroidery machine and simultaneously drives the shuttles (not shown) of most of the lower-line units.

The gear (41) is supported on the mounting frame (13) and is free to rotate about a rotating shaft (47). Using the connecting rod (39) [which is pivotally coupled to the gear by a pin (49)] forms an eccentric coupling for utilizing the swinging lever (35) and the carriage when the gear (41) is rotated (12) For reciprocating motion. The movement of the carriage is synchronized with the needle movement of the upper unit, not shown, by means of a drive shaft (45).

According to a preferred embodiment, the carriage guiding device (15) is disposed on the mounting frame (13) for pivoting about the rotating shaft (27), and the shuttle guiding device (15) is operable from an operating position Pivot to an open position. In this operative position, the shuttle guide extends parallel to the stitch plate (51), and in the open position, the carriage guide (15) pivots away from the stitch plate (51). In order to fix the carriage guiding device (15) in the operating position, a stop pin (57) is provided on a continuation (53) which is axially movable and pretensioned by a spring (55) (vorgespannt, English: pre-stressed). If the carriage guide (15) is pivoted to the stitch plate (51), the stop pin (57) can snap into a recess (59). The recess (59) is provided on an elongated guide (61) which is provided on the mounting frame (13). A projection (63) provided on the opposite end of the guiding portion (61) limits the path of the pivotable carriage guiding device (15). In the open position of the carriage guide (15), the shuttle can be replaced smoothly because it is easily accessible by an outsider.

A foot (65) is formed on the mounting frame (13), or the foot (65) is fixed to the mounting frame (13) to set the lower wire unit (11) on a frame (not shown in detail). The frame should be a frame, as is known to the multi-needle embroidery machine, but it is also conceivable to place the lower unit on a vertical base so that the shuttle can move down the vertical line. For this purpose, the cloth can also be turned from a horizontal position to a vertical position, and the needle is also the same. Therefore, the needle is perpendicular to the fabric, and a round hole (67) is provided in the foot (65). The lower thread unit can be fixed to the frame by screws, and the stitching plate (51) is also provided on the mounting frame (13). A pinhole (69) is provided in the stitch plate (51), and a needle of the multi-needle embroidery head (needle in the embroidering position) (not shown) can pass through the pinhole.

In accordance with the embodiment shown in the diagram of the line unit, the rocker (35) is rotatably disposed on a shaft (68) which is part of a clamping portion (70). The clamping portion (70) is placed in a non-rotatable manner on a pivotable shaft (72) that is pivotable between the two end positions. The pivoting lever (35) has the advantage that the carriage (17) can be moved by the pivot shaft (72) without being affected by the drive. This additional freedom of movement, for example, may allow the needle to be placed during embroidery or to move the shuttle during perforation.

Another possible embodiment of a coupler that produces shuttle motion is shown in FIG. The coupler includes a lever (71) that pivots about a fixed point of rotation (73). Here, a first arm (75) cooperates with a first eccentric or cam (77), and a second arm (79) cooperates with a first eccentric or cam (81), when the eccentric (77) (81) When it is rotated about its turning point (83), the lever (71) is forced to reciprocate, and the lever can drive a shuttle. If a two-arm lever and two eccentric wheels are not used, a simple lever (84) and a spring (85) can also be used to cause a return movement (Fig. 10).

In summary, a multi-head embroidery machine of the present invention has a plurality of spaced apart embroidery heads that are disposed on the carrier machine in a laterally movable direction. Each embroidery head has a plurality of needle positions spaced apart from each other, and the main stitch forming elements are: a wire guide, a wire guiding device, and a needle disposed on a needle push rod; the sum of these components is also called the upper line. unit. During operation, the needle moves up and down and enters the pinhole of a stitch board, which is provided with an embroidered base fabric. There is a lower line unit that cooperates with each embroidery head, which is located below or behind the stitch board. A coupler (which is preferably a sharer) is used to move the upper line unit in synchronism with the lower line unit. Unlike the conventional multi-head embroidery sewing machine, the lower line unit does not have a small spool, but has a shuttle, and the bobbin has a bobbin with a thread of up to 250 meters.

(11)‧‧‧Underline unit

(13)‧‧‧Installation box

(15)‧‧‧Slide guides

(17)‧‧‧Carriage

(19)‧‧‧Connector

(21)‧‧‧ Guide rod

(23)‧‧‧End side panels

(25)‧‧‧Installation block

(27) ‧‧‧[Installation block (25)] rotation axis

(29) ‧‧‧ accommodating department

(31)‧‧‧ Shuttle

(33) ‧‧‧Rotary axis of the pendulum

(35)‧‧‧ pendulum

(37)‧‧‧ Shuttle connecting rod

(39)‧‧‧ linkage

(41)‧‧‧ Gears

(43)‧‧‧ drive gear

(45)‧‧‧Drive shaft

(47) ‧‧‧[The rotation of the gear (41)]

(49)‧‧‧ Pins (for fixing the connecting rod to the gear (41)]

(51)‧‧‧ stitch boards

(53) ‧ ‧ Continuation

(55) ‧ ‧ spring

(57) ‧‧‧Stop sales

(59) ‧‧‧Gap

(61) ‧ ‧ Guidance Department

(63) ‧ ‧ [the projection on the guide]

(65) ‧‧‧ (mounting box) feet

(67)‧‧‧ (in the foot of the mounting frame)

(68) ‧‧‧Axis for connecting rod (39)

(69)‧‧‧ pinhole

(70) ‧‧‧Tighten

(71)‧‧‧Leverage

(72)‧‧‧Axis [used to pivot the connecting rod (39)]

(73) ‧ ‧ [the lever (71)] rotation point

(75) ‧‧‧ First arm of lever (71)

(77)‧‧‧First eccentric or cam

(79) ‧‧‧ second arm of lever (71)

(81)‧‧‧Second eccentric or cam

(83) ‧ ‧ the point of rotation of the eccentric

(84)‧‧‧ Single lever

(85) ‧ ‧ spring

Figure 1 is a perspective view of a conventional multi-needle embroidery sewing machine with a plurality of embroidery heads;

Figure 2 is a front view of a single embroidery head of a conventional multi-needle embroidery sewing machine having a plurality of needle positions

Figure 3 is a perspective view of a lower-line unit of the present invention of a novel multi-needle embroidering machine having a carriage guide disposed on the mounting frame for guiding a slide, and a carriage and a sliding movement Coupling

Figure 4 is a side view of the lower wire unit of Figure 3, wherein the carriage is in a pulled back end position;

Figure 5 is a line unit view of Figure 4, wherein the carriage is in an intermediate position;

Figure 6 is a line unit view of Figure 4, wherein the carriage is in a front end position; Figure 7 is a line unit view as shown in Figure 4, wherein the carriage is in a middle position on the way back to the front end position; Figure 4 is a bottom line unit view in which the carriage guide is pivoted downwardly to an open position; Figure 9 is a schematic view of another embodiment of a shuttle coupler having an eccentric wheel; Figure 10 is Figure 9 A variation of the coupler has a simple lever and a spring.

(13). . . Installation box

(15). . . Carriage guide

(17). . . Carriage

(19). . . Connector

(twenty one). . . Guide rod

(twenty three). . . End side plate

(25). . . Mounting block

(27). . . [mounting block (25)] rotation axis

(29). . . Housing

(31). . . shuttle

(33). . . Rotating axis of the pendulum

(35). . . Pendulum

(37). . . Shuttle connecting rod

(39). . . link

(41). . . gear

(43). . . Drive gear

(45). . . Drive shaft

(47). . . [gear (41)] rotation axis

(49). . . Pin [for fixing the link to the gear (41)]

(51). . . Pin board

(53). . . Continuation

(55). . . spring

(57). . . Stop pin

(59). . . Gap

(61). . . Guide

(63). . . [protrusion on the guide]

(65). . . (mounting box) foot

(67). . . Hole in the foot of the mounting frame

(68). . . Axis for connecting rod (39)

(69). . . Pinhole

(70). . . Clamping part

(71). . . lever

(72). . . Axis [used to pivot the connecting rod (39)]

Claims (12)

A multi-head embroidery machine having at least one embroidery head having a plurality of needle positions, which are arranged to be movable in an moving direction relative to an embroidery position, and having a lower thread unit each mating with an embroidery head ( 11), characterized in that the lower wire unit (11) has a shuttle guiding device (15) for guiding a shuttle (31) and a linker (19) for coupling the drive of the shuttle guiding device, wherein Each shuttle guide (15) is provided with its own linkage (19) which is directly connected only to a carriage (17). An embroidery machine according to claim 1, wherein: a rotatable drive shaft (45) is coupled to the coupler (19), and the coupler is designed to convert the rotational motion of the drive shaft (45) into a shuttle Reciprocating motion. An embroidery machine according to claim 1 or 2, wherein the coupler (19) is a coupling coupler or a curved coupler. An embroidery machine according to claim 2, wherein the shuttle guiding device (15) and the coupling are disposed on a mounting frame (13). An embroidery machine according to claim 1 or 2, wherein: the coupler has a swing lever (35) and a shuttle link (37), and the swing lever is pivotable about a rotation axis, the shuttle link ( 37) a first end is pivotally connected to the swing rod (35), and a second end thereof is pivotally connected to the carriage (17), and is provided with a reciprocating device, in particular a crank swinging member, and the pendulum The rods (35) are connected to cause the swing lever (35) to reciprocate during the embroidery operation. For example, the embroidery machine of claim 5, wherein: The reciprocating device is composed of a first gear (43), a second gear (41) and a connecting rod (39). The first gear is disposed on the driving shaft (45) in a non-rotatable manner, and the second gear (41) engaging the teeth of the first gear (43) and disposed on the mounting frame (13) for rotating about a rotating shaft (47), the first end of the connecting rod (39) being pivotally connected to the second On the gear (41), the second end thereof is pivotally connected to the swing lever (35). The embroidery machine of claim 2, wherein: the shuttle guiding device (15) is a linear guiding member, at least a linearly extending guiding member (21), and the carriage (17) is movably arranged On the guiding element (21) to accommodate the shuttle (31). The embroidery machine of claim 1 or 2, wherein: the carriage guiding device (15) is disposed on the mounting frame (13), pivotable about a pivot axis (27), and operable from an operation The position is pivoted to an open position. An embroidery machine according to claim 1 or 2, wherein: a plurality of embroidery heads on a frame and a considerable number of lower thread units associated with the embroidery heads are provided, and at least one tenter is provided to embroider the objects The tenter is arranged on the frame of the embroidery machine, and can be moved between the upper line unit and the lower line unit in the x direction and the y direction. The embroidery machine of claim 6, wherein the swinging lever (35) is pivotally mounted on a clamping block (70) and the clamping block (70) is preferably The pivot shafts (68) are connected in a manner that they are not rotatable relative to each other. The embroidery machine of claim 2, wherein: the movement of the carriage (17) in one direction is achieved by the linkage, and the movement of the carriage (17) in the opposite direction is achieved by a spring means. versus The carriage (17) is connected or connected to a portion that is coupled to the carriage (17). A lower wire unit (11) for a multi-head embroidery machine, comprising: a mounting frame (13) having a shuttle guiding device (15) disposed thereon; a sliding device movably disposed on the shuttle guiding device (15) a frame (17) for accommodating the shuttle (31); a coupling provided on the mounting frame (13) coupled with the carriage (17) to cause the shuttle (31) to reciprocate during the embroidery operation, wherein each shuttle The guiding device (15) is provided with its own linkage (19).