TWI693322B - Shuttle embroidery machine - Google Patents

Abstract

A shuttle embroidery machine in which the drive beam of the shuttle embroidery machine is moved up and down on a movement path inclined to the vertical line by a crank linkage (5, 7, 25, 31 and 33). No linear guide member is needed, and the linear motion path is preferably realized by a coupling that is snapped on the driving beam.

Description

Shuttle embroidery machine

The invention relates to a shuttle embroidery machine.

Shuttle embroidery machines have been disclosed for more than 100 years, and they operate according to a two-thread system, that is, one needle thread and one shuttle thread, in which the needle thread is wound by the shuttle thread for each stitch. The front needle provided with a small hole conveys the needle thread through the sewing material to the back of the sewing material, and the needle thread forms a loop during the process of withdrawing the sewing needle. Subsequently, a shuttle containing the bobbin thread passes through the ferrule. The shuttle embroidery machine includes a large number of stitches in a row and a corresponding number of stitches and shuttles. A driving beam is provided to move the shuttle up and down in a slightly inclined position vertically.

EP 1 595 990 discloses such a shuttle embroidery machine, which has a drive beam that vibrates due to a crank mechanism. With the drive beam extending across the entire width of the machine, the two drive pins assigned to each needle are used to make the shuttle pass through the previously formed needle thread ferrule and return. The crank structure of the driving beam can produce 600 needles per minute and above.

In order to reduce the cost of embroidery, the customer requires a machine that can achieve a larger number of stitches. Although the EP 1 595 990 actuator can achieve this, its shortcoming lies in the high degree of wear of multiple components of the actuator. The upper driving nail and the lower driving nail use the driving beam to make the shuttle pass through the ferrule of the needle thread. Due to the large acceleration on the reversing point and the lower reversing point on the driving beam, the supporting point in the crank coupling is greatly stressed , So its service life is shortened due to wear. The following may appear Situation: The sphere in the linear guide device of the drive beam guide device cannot perform rolling motion, but slips in the guide path, causing local excessive losses. In particular, the axis of the bearing hole and the connecting rod used to make the drive beam slide back and forth on its path inclined to the vertical line will reach the limit of the force.

CH 703 090 discloses a driving beam transmission device, which is used to prevent the sliding movement between the connecting rod and the driving beam. In this case, bendable elements are arranged at both ends of the connecting rod, so that the lateral movement is not absorbed by the sliding on a shaft body located on the driving beam, but is absorbed by the elastic deformation of the connecting rod. In this prior art, no push motion is carried out, but in each lift, the bending force caused by the spring element on the connecting rod must be overcome twice. This can only be achieved when the lifting transmission device has a large transmission power. In addition, when the number of lifts exceeds 600 per minute, in addition to the vibration that would originally occur in the shuttle embroidery machine, the elastic machine elements will also cause the drive beam to vibrate. In this case, in addition to the driving beam, the shuttle path and the shuttle transported by the path will also vibrate. Therefore, the sliding movements prevented by these elastic elements and the wear of the elements that are no longer needed here are transferred to the wear of the shuttle path and transferred to the linear guide elements arranged obliquely to the vertical with respect to the drive beam, and by the link The spring elastic element causes the shuttle embroidery machine to have an inherently harmful vibration.

An object of the present invention is to provide a shuttle embroidery machine whose transmission member for the driving beam can increase the number of stitches per minute beyond the range of the number of stitches per minute that can be achieved hitherto, and in the shuttle embroidery machine The degree of wear of these transmission members is much less than the transmission members disclosed so far.

Another object of the present invention is to reduce the use of The noise of the transmission of the moving beam is generated by reducing the vibration.

Another object of the present invention is to eliminate the sliding movement in the transmission members and on the driving beam, and replace the linear guide members with corresponding elements.

Another object of the present invention is to improve the shuttle embroidery machine or the transmission used for the driving beam so that it can be applied to an embroidery machine having a plurality of shuttle paths that are arranged obliquely to a vertical line except counterclockwise It can also be tilted clockwise to the vertical.

The solution of the present invention to achieve the above object is a shuttle embroidery machine. An advantageous solution to the above purpose is given by the subsidiary item.

The shuttle embroidery machine according to the present invention includes a driving beam and a driver, the driving beam has a driving pin fixed thereon, so that most shuttles move together along the shuttle path, and the shuttle path is set inclined to the vertical line, and the driver It is used to drive the driving beam, which is roughly parallel to the shuttle path, wherein the driving of the driving beam is achieved by a linkage, which is composed of a multi-joint element.

According to an advantageous design of the invention, for linear travel, the drive beam is not supported in a linearly running guide element.

According to another advantageous design of the present invention, most of the multi-joint elements carry the driving beam and drive it in an oscillating manner, and the driving beam is pivotally connected to these multi-joints and guided by them on a motion path extending obliquely to the vertical line .

According to yet another design of the present invention, the multi-joint element includes a plurality of rocker arms connected to each other, and the rocker arm is pivotally connected to a common linkage, and its pivotal connection position with the drive beam is almost The movement in a straight line runs at a preset slope with the vertical or horizontal line.

According to yet another design of the present invention, each multi-joint element pivotally connected to the linkage includes a four-joint with three rocker arms, of which the second and third rocker arms are pivotally connected to the frame, and the first One rocker arm is pivotally connected to the other two rocker arms, and the free end of the connecting rod on the linkage is fitted into the first rocker arm in an articulated manner.

According to another design of the present invention, the connecting rod is pivotally connected to the first rocker arm and the linkage.

According to another design of the present invention, the pivotal connection between the connecting rod and the first rocker arm is caused on the first rocker arm.

According to yet another design of the present invention, the connecting rod is connected to the crank and the first rocker arm by a joint, and the joint includes two bearing bolts arranged perpendicular to each other.

According to another design of the present invention, the first rocker arm is pivotally connected to a fixing element, and the connecting rod is also pivotally connected to the fixing element, wherein the fixing element is fixed to the driving beam.

According to yet another design of the present invention, the linkage is connected to a double-arm lever (Wippe), which can be driven by a spindle, which drives all linkages.

According to yet another design of the present invention, the mechanism fitted on the driving beam can guide the driving beam on a linear movement path, which extends at an angle of +α to -α to the vertical line.

The shuttle embroidery machine according to the present invention includes a driver device and a guide device, which are used by a driving beam with a driving nail to drive a plurality of shuttles, which can be inclined along a vertical line between two end positions The shuttle route is guided laterally back and forth, and there is a coupling that can be driven to vibrate the driving and guiding device, where the guiding device includes a "pivoting lever" that can be driven by the coupling, The free end is connected with the driving beam and guides the driving beam roughly up and down. The guiding device is arranged on a carrier or directly on the frame of the embroidery machine. The guiding device includes at least a first rocker arm, A second rocker arm and a third rocker arm, at least one pivot bearing is formed on each rocker arm to connect with one of the other two rocker arms or the The carrier is pivotally connected to form two pivot axes B and C on the carrier to pivotally support the first ends of the second and third rocker arms, and the second ends of the second and third rocker arms are on the axis E And A is pivotally connected to the first rocker arm, in addition to the two pivot bearings E and A, another pivot axis D is formed on the first rocker arm, which is provided on the driving beam, and one end of a connecting rod is pivotally connected On the coupling, the other end is pivotally connected to the driving beam, and the crank arm is provided on the driving shaft in a drivable manner.

According to an advantageous design of the present invention, each end of the connecting rod includes a cruciform joint, wherein the first cruciform joint is pivotally connected to the crank arm, and the second cruciform joint is pivotally connected to the axis D on the driving beam.

According to an advantageous design of the invention, there are at least two drive-and guide devices on the drive beam that are fitted on the drive beam at a distance.

With the crank mechanism of the present invention, a larger number of stitches can be achieved, and there is no need to use a linear guide member implemented as a guide rod or a guide rail to cause the drive beam to move obliquely to the vertical. The linear movement of the driving beam is realized by a four joints adopting the corresponding construction scheme, and the four joints are driven by a crank mechanism. Rotating motion is used to replace pushing motion. It is well known that rotating motion produces less noise, and it generates much smaller acceleration and deceleration forces at the reversal point of the diagonal movement of the drive beam. In this way, the degree of bearing stress can be greatly reduced and the rolling elements in the bearing path can be prevented from sliding.

Another advantage of the present invention is that it is possible to use the actuator with a shuttle path at an angle that is mirror-arranged with respect to the vertical without having to replace machine elements.

1: transmission and guidance device, guidance and transmission device, transmission device

3: Support point, drive shaft

5: crank arm

5': end of driven side

7: connecting rod

7': end of drive side

7": upper end

9: First connector

11: crank pin

13: connecting rod pin

15: Drive beam

17: Second cross connector, second connector

19: journal

21: fastening element

23: Support socket

25: First rocker arm, first lever

27: Carrier

28: bottom plate

29: Rocker pin

31: Second rocker arm

33: Third rocker

A: axis

B: axis

C: axis

D: Rotating shaft, axis

E: axis

H: horizontal direction, degree, movement, horizontal movement

P: Arrow, vertical movement, lifting movement

α: angle

Fig. 1 is a perspective view of a conventional transmission device for a driver device disclosed in EP 1595990; Fig. 2 is a perspective view of another conventional transmission device with a resilient link for a driver device disclosed in CH 703090 Figure 3 is a view of the transmission device according to the invention along the transmission shaft for the transmission device, the drive beam is at the lowest position; Figure 4 is a side view of the transmission device according to the invention and the drive beam at right angles; Figure 5 is based on A perspective view of the transmission device of the present invention; FIG. 6 is a view of the transmission device according to the invention along the transmission shaft for the transmission device, the drive beam is at the highest position; FIG. 7 is a right angle of the transmission device and the drive beam according to the invention 8 is a schematic diagram of three guide rod components for a shuttle path inclined to the right and (shown by a broken line) according to the present invention.

The present invention will be described in detail below with reference to the drawings.

The prior art shown in FIG. 1 is EP 1 595 990, and its elements and working principles are described in detail in the related description of FIG. 4 of EP 1 595 990. According to this embodiment of the transmission device for driving the beam, the driving beam is supported on a plurality of guide rods in such a manner as to be movable on the guide device inclined to the vertical. The oblique angle of the relative vertical line is preferably 15°. The lifting transmission device for driving the beam and having a crank coupling composed of a crank and a connecting rod moves vertically with precision. In order to compensate for the lateral movement of the driving beam during the movement, the driving beam is arranged with A horizontal shaft body on which the transmission rod/connecting rod can be moved transversely to the transmission direction, so that the drive beam can move laterally relative to the connecting rod in the support. At higher rotational speeds, this type of shifting motion will have correspondingly higher wear, especially at the reversal point. The crank arm can be part of the rocker or directly mounted on a continuous upright shaft.

CH 703 090 discloses a solution to eliminate wear (Figure 2). This solution avoids the pushing movement on the end of the connecting rod, but in each lift, the bending force must be overcome twice by the flexible connecting rod in order for the spring element to bend from its rest position. After adopting this solution, the frictional force and the degree of abrasion of the inclined guide device used to support the driving beam are relatively large.

In the transmission and guide device 1 of the present invention shown in FIGS. 3-7, like the prior art described in EP 1 595 990, the element symbol 3 indicates a support point (shaft body) 3 for the crank arm 5. The motion transmission from the support point 3 to the transmission rod (referred to as the connecting rod 7 for short) is carried out through the crank arm 5. Unlike the conventional embodiment shown in FIG. 1, the transmission-side end 7 ′ of the connecting rod 7 is not directly supported in the driven-side end 5 ′ of the crank arm 5. Drive from the crank arm 5 toward the connecting rod 7 through the first joint 9, one side of the first joint is supported on the crank pin 11, and the other side is supported at the end of the transmission side of the first joint 9 by twisting 90° 7'on the connecting rod pin 13. That is, the first joint 9 provides a special construction scheme of the cross joint, which allows the connecting rod 7 to be rotatably supported perpendicularly to the longitudinal extension of the drive beam 15 in order to absorb the relative connection of the drive beam 15 The horizontal movement of the rod 7. This also allows optimal transmission of alternating loads that are not insignificant. The driving beam 15 is shown only in the form of a dot-and-dash line in FIG. 4. In other drawings, the driving beam is not shown for clarity, only the guiding and transmission device 1 is shown. The upper end 7" of the connecting rod 7 is also rotatably supported in the second cross joint 17 through the link pin 13, and the second cross joint adopts a construction scheme similar to the lower first joint 9. The second joint 17 may Turn on the journal 19. The journal 19 is for fastening A part of the element 21 that the fastening element establishes a connection with the drive beam 15 and is screwed to the drive beam, for example.

A further support socket 23 is provided on the fastening element 21 on which the first rocker arm 25 is pivotally connected in a rotatable manner at a right angle to the journal 19. A third rocker arm 33 is pivotally connected to the center of the first rocker arm 25, one side of which is pivotally connected to the axis A, and the other side is pivotably connected to the axis C. The axis C or a shaft body arranged thereon is connected to the carrier 27 fixed on the frame of the shuttle embroidery machine through a bottom plate 28 in a fixed manner or directly connected to the shuttle embroidery machine. The second end of the first rocker arm 25 is pivotally connected to the first end of the second rocker arm 31 through a rocker pin 29 having an axis E. The second end of the second rocker arm 31 is rotatably supported about the axis B. The axis B is fixedly arranged on the bottom plate 28.

Therefore, the three rocker arms 25, 31, and 33 form a four-joint, which includes the two axes B and C fixed on the base plate 28, and the two can be circled on the first rocker arm 25 with different radii. The axes A and E of the arc movement.

FIG. 7 shows the final position of the driving beam 15. The end of the first rocker arm 25 which is arranged opposite to the rocker arm pin 29 (axis) is supported on the support socket 23 on the fastening element 21 in a rotatable manner on the drive beam 15 and can surround a rotation axis arranged there D turns.

The schematic diagram of FIG. 8 shows the pivot points of the three rocker arms 25, 31 and 33 and the axes B and C on the carrier 27. The fastening element 21 that is caught by the connecting rod 7 (the connecting rod 7 is schematically shown) is not shown in detail, but the movement curve of the fastening element 21 and the movement curve of the driving beam 15 are indicated by arrows P only. For the sake of clarity, the driving beam 15 to which the fastening element 21 is fixed is also not shown in the figure.

The working principle of the guiding and transmission device 1 for driving the beam 15 will be described below. At least two guides and the transmission device 1 are engaged on the driving beam 15 and are inclined to the vertical Support and guide it on the path. The connecting rod 7 is pivotally connected to the driving beam 15 through the fastening element 21, and by vibrating vertical movement of the connecting rod, the driving beam 15 moves upward and downward along the arrow P. Since the fastening element 21 and the driving beam 15 are pivotally connected to the first lever 25 through the axis D, the transmission motion by the connecting rod 7 is not implemented along the vertical line, but is also pivotally connected to the second and third rocker arms 31, The first rocker arm 25 on 33 causes the drive beam 15 to also move in the horizontal direction H. Since the vertical reversal point P and the lower reversal point perform the vertical movement P, a movement is performed at the same time, that is, a vertical movement and a horizontal movement performed simultaneously with the degree H of the driving beam 15. Based on the lateral movement H of the driving beam 7 under the reversing point and the upper reversing point of the connecting rod 7, the driving beam 15 moves on an approximately straight line, which forms an angle α with the vertical, for example 15°. The driving beam 15 is supported by a plurality of transmission and guiding devices 1 arranged side by side along the driving beam 15, without the need to use fixed linear guide members such as guide rails as in the prior art shown in FIGS. 1 and 2, therefore, the The drive beam 15 moves on a path that is at a desired acute angle to the vertical and is approximately linear. The transmission device 1 is not only responsible for driving the lifting movement P of the beam 15 but also for driving the horizontal movement H of the beam 15 without linear guide members. Therefore, for each lift and stitch of the embroidery machine, the transmission device excludes the two guided linear movements shown in FIG. 1 and the linear movement at an acute angle to the vertical line and the connecting rod as shown in FIG. 2 7 of the corresponding vibration-related bending.

The transmission device 1 can also be used to drive the drive beam 15 in a shuttle embroidery machine with several shuttle paths without replacing its components. These shuttle paths have an inclined position with respect to the vertical line and are in the opposite direction to the vertical line − Alpha extension. Starting from the position shown by the solid line in FIG. 8, simply turning the third rocker arm 33 counterclockwise to rotate the second rocker arm 31 clockwise to the position shown by the broken line can easily implement this Switch. Therefore, the transmission works with identical machine elements in both directions of rotation, so that the manufacturer can provide two The device of the shuttle guide without the need for additional replacement components can reduce costs and reduce storage.

1‧‧‧ drive and guide device, guide and drive device, drive device

3‧‧‧support point, drive shaft

5‧‧‧Crank arm

7‧‧‧Link

7"‧‧‧top

9‧‧‧First connector

11‧‧‧Crank pin

17‧‧‧Second cross connector, second connector

19‧‧‧ journal

21‧‧‧ fastening element

23‧‧‧support socket

25‧‧‧ First rocker arm, first lever

27‧‧‧Carrier

28‧‧‧Bottom plate

29‧‧‧ rocker pin

31‧‧‧Second Rocker

33‧‧‧ Third Rocker

B‧‧‧Axis

C‧‧‧Axis

Claims (10)

A shuttle embroidery machine has a driving beam (15) with driving nails fixed on it to move most shuttle cars along a shuttle route inclined to a vertical line, and has a driving-and guiding The guiding device (1) includes a crank drive (5) (7), the crank drive has a crank arm (5) and a connecting rod (7), so that the driving beam (15) is substantially parallel to the straight line along the line The shuttle line moves linearly, characterized in that the drive-and-guiding device (1) has a four joints (25) (31) (33) driven by the crank drive to generate a straight line of the drive beam (15) Movement, wherein for the straight movement of the drive beam (15), it will not be supported on the drive-and guide device (1), wherein the four joints include three rocker arms (25, 31) coupled to each other , 33), the arrangement is pivotally connected to a common crank drive (5, 7), and has a pivotal position with the drive beam (15), which causes the vertical or horizontal near the preset slope Linear motion, in which a second rocker arm (31) and a third rocker arm (33) are pivotally connected to the frame of the embroidery machine and the first rocker arm (25) and the other two rocker arms (31) , 35) is pivotally connected, and the free end of the connecting rod (7) is pivotally fitted on the first rocker arm (25) on the linkage (5, 7). For example, the shuttle embroidery machine as claimed in item 1, wherein the connecting rod (7) is both pivotally connected to the first rocker arm (25) and pivotally connected to the linkage (5). A shuttle embroidery machine as claimed in item 2 of the patent scope, wherein the pivotal connection between the connecting rod (7) and the first rocker arm (25) is implemented on the first rocker arm (25). For example, the shuttle embroidery machine according to any one of the patent application items 1 to 3, wherein the connecting rod (7) includes two splines at right angles to each other through a joint (9, 17) (11, 19), connected to the crank arm (5) and the first rocker arm (25), the joint (9) (17) may be in the form of a cross joint. The shuttle embroidery machine according to any one of the patent application items 1 to 3, wherein the first rocker arm (25) is pivotally connected to a fastening element (21), and the fastening element (21) The connecting rod (7) is also pivotally connected, and wherein, the fastening element (21) is fixed on the driving beam (15). As in the shuttle embroidery machine according to any one of patent application items 1 to 3, the crank drive (5, 7) is connected to a double-arm lever, which can be driven by a main shaft upright shaft transmission. The shuttle embroidery machine according to any one of the patent application items 1 to 3, wherein the crank drive (5, 7) and the rocker arm (25, 31, 33) fitted on the drive beam (15) ) The drive beam can be guided on a linear motion path that extends at an angle of +α or -α relative to the perpendicular. For example, the shuttle embroidery machine according to any one of patent application items 1 to 3, in which: there are many four joints that carry and drive the driving beam (15) in a vibratory manner, the driving beam (15) and the The four joints are pivotally connected and guided by the four joints on a movement path extending obliquely to the vertical line. For example, the shuttle embroidery machine according to any one of patent application items 1 to 3, in which at least two drive-and guide devices (1) are fitted on the drive beam (15) at spaced positions On the drive beam (15). For example, the shuttle embroidery machine in item 9 of the patent scope, in which: The crank drives (5) (7) of the at least two drive-and-guiding devices (1) are each connected to a double-arm lever, which can be driven by a spindle, which drives all crank drives.

Images