TW201900974A - Shuttle embroidery machine - Google Patents

Abstract

The drive bar of a shuttle embroidery machine is moved up and down by a mechanism (5, 7, 25, 31 and 33) along a movement path which is inclined relative to the vertical. The linear movement path is created without linear guide means, preferably by a mechanism that engages the drive bar.

Description

 Shuttle embroidery machine  

The present invention relates to a shuttle embroidery machine as described in the foregoing paragraph 1 of the patent application.

The shuttle embroidery machine has been disclosed for more than one hundred years and operates in accordance with a two-wire system, namely a needle thread and a shuttle thread, wherein for each stitch, the needle thread is wound by a shuttle thread. A front needle provided with a small hole conveys the needle thread through the sewing material to the back side of the sewing material, and the needle thread forms a circle during the withdrawal of the needle. A shuttle containing the shuttle wire then passes through the ferrule. The shuttle embroidery machine includes a large number of stitches arranged in a row and a corresponding number of stitches and shuttles. There is a drive beam that moves the shuttle up and down in a slightly tilted position.

EP 1 595 990 discloses such a shuttle embroidery machine having a drive beam that vibrates by a crank mechanism. By means of the drive beam extending over the entire width of the machine, two drive pins assigned to each of the needles are used to pass the shuttle through the previously formed needle loop and return. The crank structure of the drive beam can produce 600 needles and more than 600 needles per minute.

In order to reduce the cost of embroidery, the customer asks for a machine that can achieve a larger number of stitches. Although the actuator of EP 1 595 990 can achieve this, the disadvantage is that the components of the transmission are worn more. The upper drive pin and the lower drive pin drive the beam through the ferrule of the needle thread by driving the beam. Due to the large acceleration on the reverse point and the lower reversal point above the drive beam, the support point in the crank coupler is extremely stressed. Therefore, its service life is shortened due to wear. It is thus possible that the ball in the linear guide of the drive beam guiding device cannot be moved in a rolling manner, but instead slips in the guiding path, causing local excessive wear. In particular, the bearing bore and the axis on the connecting rod that causes the drive beam to slide back and forth over its path oblique to the vertical line will reach a limit.

CH 703 090 discloses a drive beam transmission for preventing a shifting movement between a connecting rod and a drive beam. In this case, the two ends of the connecting rod are provided with bendable elements, so that the lateral movement is not absorbed by the sliding on a shaft body on the driving beam, but is absorbed by the elastic deformation of the connecting rod. No shifting motion is implemented in this prior art, but in each lift, the bending force caused by the spring elements on the connecting rod must be overcome twice. This can only be achieved if the lifting gear has a large transmission power. In addition, when the lifting number exceeds 600 per minute, the vibration will occur in the shuttle embroidery machine, and the elastic machine component will also cause the driving beam to vibrate. In this case, in addition to the drive beam, the shuttle path and the shuttle conveyed by the path will also vibrate. Therefore, the sliding movement prevented by these elastic elements and the wear of the elements which are no longer required here are transferred to the wear on the shuttle path and transferred to the linear guiding elements which are arranged obliquely to the vertical with respect to the drive beam, and by the connecting rod The spring-elastic element causes the shuttle embroidery machine to have an inherently harmful vibration.

It is an object of the present invention to provide a shuttle embroidery machine for a transmission member of the drive beam capable of increasing the number of stitches per minute beyond the range of needles per minute that can be achieved so far, and in the shuttle embroidery machine These transmission members are much less worn than the transmission members disclosed so far.

Another object of the present invention is to reduce the noise generation of the actuator for the drive beam in the case of increasing the number of stitches, in particular to mitigate the vibration generated.

Another object of the present invention is to eliminate the shifting motion in the transfer members and the drive beam and to replace the linear guide members with corresponding elements.

Another object of the present invention is to improve the shuttle embroidery machine or the actuator for the drive beam so that it can be applied to an embroidery machine having a plurality of shuttle paths that are arranged obliquely to the vertical line in a counterclockwise direction. It can also be placed obliquely to the vertical line.

A solution for achieving the above object of the present invention is a shuttle embroidery machine as described in the feature of claim 1. An advantageous solution to the above purpose is given by the subsidiary.

The shuttle embroidery machine according to the present invention comprises a drive beam and a drive having a drive pin fixed thereon for causing a plurality of shuttles to move together along a shuttle path, the shuttle path being inclined to a vertical line, the drive The drive beam is driven to be substantially parallel to the shuttle path, wherein the lifting drive of the drive beam is achieved by a coupler which is formed by a multi-joint element.

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

According to a further advantageous refinement of the invention, the plurality of multi-joint elements carry the drive beam in an oscillating manner and drive it, and the drive beam is pivotally connected to the multi-joints and guided by them in a path which extends obliquely over a vertical line .

According to still another aspect of the present invention, the multi-joint element includes a plurality of rocker arms of interconnecting rocker arms that are pivotally coupled to a common linkage and that are pivotally coupled to the drive beam. The motion of the line travels at a preset slope with the vertical or horizontal lines.

According to still another aspect of the present invention, the multi-joint member pivotally coupled to the coupler includes a four-joint having three rocker arms, wherein the second and third rocker arms are pivotally coupled to the frame, and the first shake The arm is pivotally coupled to the other two rocker arms, and the free end of the link on the coupler is hingedly fitted to the first rocker arm.

According to another design of the invention, the link is pivotally coupled to the first rocker arm and to the coupler.

According to a further aspect of the invention, the pivoting between the link and the first rocker arm is caused by the first rocker arm.

According to still another aspect of the present invention, the links are each connected to the crank and the first rocker arm by a joint, and the joint includes two bearing bolts disposed perpendicularly to each other.

According to another embodiment of the 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 on the driving beam.

According to a further refinement of the invention, the coupling is connected to a two-arm lever (Wippe) which can be driven by a spindle which drives all of the couplings.

According to still another aspect of the present invention, the mechanism fitted to the drive beam guides the drive beam on a linear motion path that extends at an angle of +α to -α to the vertical line.

The shuttle embroidery machine according to the present invention comprises a driver device and a guiding device for use with a drive beam having a drive pin for driving a plurality of shuttles which are tiltable along a line and a vertical line between the two end positions. The shuttle path is reciprocally guided laterally and has a driveable linkage for vibrating the drive-and-guide device, wherein the guide includes a "pivoting lever" that can be actuated by the coupler. The free end is connected to the driving beam and the driving beam is guided substantially upwards and downwards, wherein: the guiding device is disposed on a carrier or directly on the frame of the embroidery machine, the guiding device comprises 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 pivotally connect with each rocker arm of the other two rocker arms or the carrier to form two pivot axes on the carrier B and C for pivotally supporting the first ends of the second and third rocker arms, and the second ends of the second and third rocker arms are pivotally connected to the first rocker arm on the axes E and A, except Outside the two pivot bearings E, A, another pivot axis D is formed on the first rocker arm, and the The movable beam, one end of a connecting rod pivotally connected to the linkage and the other end pivotally connected to the drive beam, the crank arm drivingly disposed in the drive shaft.

According to an advantageous design of the invention, the two ends of the connecting rod each comprise a cross joint, wherein the first cross joint is pivotally connected to the crank arm, and the second cross joint is pivotally connected to the shaft D on the driving beam.

According to an advantageous embodiment of the invention, at least two drive and guide means are mounted on the drive beam at a distance apart.

With the crank mechanism of the present invention, a large number of stitches can be achieved, and it is not necessary to move the drive beam in a manner inclined to the vertical by a linear guide member implemented as a guide rod or guide rail. The linear motion of the drive beam is achieved by a four joint using a corresponding construction scheme that is driven by a crank mechanism. Instead of a shifting motion with a rotational motion, it is known that the rotational motion produces less noise and produces much less acceleration and deceleration forces at the reversal point of the oblique movement of the drive beam. This greatly reduces the stress on the bearing and prevents the rolling elements in the bearing path from slipping.

Another advantage of the present invention is that the actuator having a shuttle path at an angle relative to the vertical mirror image arrangement can be used without the need to change machine components.

1‧‧‧Transmission and guidance, guidance and transmission, transmission

3‧‧‧Support point, drive shaft

5‧‧‧ crank arm

5'‧‧‧ driven side end

7‧‧‧ Connecting rod

7'‧‧‧Drive side end

7"‧‧‧ upper end

9‧‧‧First joint

11‧‧‧ crank pin

13‧‧‧ Link pin

15‧‧‧Drive beam

17‧‧‧Second cross connector, second connector

19‧‧‧ journal

21‧‧‧ fastening elements

23‧‧‧Support socket

25‧‧‧First rocker arm, first lever

27‧‧‧ Carrier

28‧‧‧floor

29‧‧‧ rocker pin

31‧‧‧Second rocker

33‧‧‧ Third rocker arm

A‧‧‧ axis

B‧‧‧ axis

C‧‧‧ axis

D‧‧‧Rotary shaft, axis

E‧‧‧ axis

H‧‧‧Horizontal, degree, movement, horizontal movement

P‧‧‧ arrows, vertical movement, lifting movement

‧‧‧‧ angle

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 an elastic link for a driver device disclosed in CH 703090. Figure 3 is a view of the transmission along the transmission shaft for the transmission, the drive beam is at the lowest position; Figure 4 is a side view of the transmission at right angles to the drive beam; Figure 5 is a perspective view of the transmission; Figure 6 is a view of the transmission along the drive shaft for the transmission, the drive beam is at the highest position; Figure 7 is a side view of the transmission at right angles to the drive beam; and Figure 8 is a shuttle for tilting to the right The path and (shown by the broken line) are schematic views of three guide members for the shuttle path tilted to the left.

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

The prior art is shown in Fig. 1 in EP 1 595 990, the components and operating principles of which are described in detail in the related description of Fig. 4 of EP 1 595 990. According to such an embodiment of the transmission for driving the beam, the drive beam is supported on a plurality of guide rods in such a manner as to be movable on a guide inclined to the vertical. The oblique angle of the opposite vertical line is preferably 15°. The lifting gear for driving the beam and having a crank coupling consisting of a crank and a connecting rod moves in a precise vertical direction. In order to compensate for the lateral movement of the drive beam during the movement, a horizontal shaft body is arranged on the drive beam, and the transmission rod/link rod is supported on the shaft body so as to be movable transversely to the transmission direction, so that the drive beam is driven Lateral movement relative to the link is possible in the support. When the rotational speed is large, such a shifting movement, in particular, a correspondingly high wear occurs at the reversal point. The crank arm can be part of the rocker or mounted directly on a continuous upright shaft.

CH 703 090 discloses a solution to eliminate wear (Fig. 2). This solution avoids the undulating motion on the end of the link, but in each lift, the bending force must be overcome twice by the flexible link so that the spring element bends from its rest position. With this solution, the slanting guides used to support the drive beam are subject to greater friction and wear.

In the transmission and guiding device 1 of the present invention shown in Figs. 3-7, the same as the prior art described in EP 1 595 990, the reference numeral 3 denotes a bearing point (shaft body) 3 for the crank arm 5. The movement of the self-supporting point 3 toward the transmission rod (referred to as the connecting rod 7) is carried out through the crank arm 5. Unlike the conventional embodiment shown in Fig. 1, the drive side end 7' of the link 7 is not directly supported in the driven side end 5' of the crank arm 5. The first joint 9 is driven from the crank arm 5 toward the connecting rod 7, one side of which is supported on the crank pin 11 and the other side is supported at the transmission side end of the first joint 9 by a twist of 90°. On the link pin 13 on the 7'. That is, the first joint 9 provides a special construction of the cross joint that supports the link 7 in a manner that is rotatable perpendicular to the longitudinal extent of the drive beam 15 to absorb the relative connection of the drive beam 15. The horizontal movement of the rod 7. This also allows for optimal delivery of alternating loads that are not trivial. The drive beam 15 is shown in Figure 4 only in the form of a dotted line. In the other figures, the drive beam is not shown for the sake of clarity and only the guide and transmission 1 are shown. The upper end 7" of the connecting rod 7 is also supported in the second cross joint 17 in such a manner as to be rotatable through the link pin 13, the second cross joint adopting a construction scheme similar to the lower first joint 9. The second joint 17 can be Rotating on the journal 19. The journal 19 is part of a fastening element 21 which establishes a connection to the drive beam 15 and is for example screwed to the drive beam.

A further bearing socket 23 is provided on the fastening element 21, on which the first rocker arm 25 is pivotally connected at right angles 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 of which is rotatably pivotally connected to the axis C. The axis C or a shaft body arranged thereon is connected in a fixed manner to a carrier 27 fixed to the frame of the shuttle embroidery machine by a bottom plate 28 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 via a rocker pin 29 having an axis E. The second end of the second rocker arm 31 is supported in a rotatable manner about the axis B. The axis B is fixedly disposed on the bottom plate 28.

Thus, the three rocker arms 25, 31 and 33 form a four joint comprising the axes B and C which are fixed on the bottom plate 28, and the two can be rounded on the first rocker arm 25 with different radii The axes A and E of the arc motion.

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

The pivotal points of the three rocker arms 25, 31 and 33 and the axes B and C on the carrier 27 are shown in the schematic view of FIG. The fastening member 21 which is caught by the link 7 (shown schematically by the connecting rod 7) is not shown in detail, but the movement curve of the fastening member 21 and the movement curve of the drive beam 15 are indicated by only the arrow P. For the sake of clarity, the drive beam 15 to which the fastening element 21 is attached is likewise not shown.

The principle of operation of the drive beam 15 and the transmission 1 will now be explained. At least two guides are engaged with the transmission 1 on the drive beam 15 and supported and guided in a path oblique to the vertical. The connecting rod 7 is pivotally connected to the driving beam 15 through the fastening member 21, and the driving beam 15 moves upward and downward along the arrow P by the vibrating vertical movement of the connecting rod. Since the fastening member 21 and the driving beam 15 are pivotally connected to the first lever 25 through the axis D, the transmission movement of the connecting rod 7 is not performed along the vertical line, but is also pivotally connected to the second and third rocker arms 31, The first rocker arm 25 on the 33 causes the drive beam 15 to also move in the horizontal direction H. Since the vertical movement P is performed at the reversal point and the lower reversal point above the link 7, a movement is simultaneously performed, that is, a vertical movement and a horizontal movement performed simultaneously with the degree H of the drive beam 15. Based on the lateral movement H of the drive beam 7 at the reversal point and the upper reversal point below the link 7, the drive beam 15 moves on an approximately straight line that forms an angle a with the vertical, for example 15[deg.]. The drive beam 15 is supported by a plurality of transmission and guiding devices 1 arranged side by side along the drive beam 15, without the need for a fixed arrangement of linear guide members, such as guide rails, as in the prior art shown in Figures 1 and 2. The drive beam 15 moves on a path that is at a desired acute angle to the vertical and that is approximately linear. The transmission 1 is responsible not only for the lifting movement P of the drive beam 15, but also for the horizontal movement H of the drive beam 15 without the need for a linear guide member. Therefore, in terms of each lifting and stitching of the embroidery machine, the transmission eliminates the two guided linear motions as shown in FIG. 1 and the linear motion of the acute angle with the vertical line as shown in FIG. 2 and the connecting rod. Corresponding vibration related bending of 7.

The transmission 1 need not be replaced by its components and can also be used to drive a drive beam 15 in a shuttle embroidery machine having a plurality of shuttle paths having an inclined position relative to the vertical and in a direction opposite to the vertical - α extension. Starting from the position shown by the solid line in Fig. 8, simply by rotating the third rocker arm 33 counterclockwise, thereby rotating the second rocker arm 31 clockwise to the position shown by the broken line, this can be simply implemented. Switch. Thus, the transmission operates in exactly the same machine element in both directions of rotation, so that the manufacturer can provide means for both shuttle guides without the need for additional replacement components, thereby reducing costs and Reduce storage.

Claims (13)

 A shuttle embroidery machine having: a drive beam (15) having a drive pin fixed thereto for cooperating a plurality of shuttles along a shuttle path inclined to a vertical line, and having a drive-and-guide a guiding device (1) comprising a crank drive (5) (7) having a crank arm (5) and a link (7) such that the drive beam (15) is substantially parallel to the line The shuttle route is linear, characterized in that the drive-and-guide device (1) has a four-joint (25) (31) (33) driven by the crank drive to generate a straight line of the drive beam (15) motion.    The shuttle embroidery machine of claim 1, wherein for the linear operation of the drive beam (15), it is not supported on the linearly moving guiding element.    A shuttle embroidery machine according to claim 1 or 2, wherein the multi-link member comprises an arrangement of a plurality of rocker arms (25, 31, 33) coupled to each other, the arrangement being common The crank drive (5, 7) is pivotally coupled and has a pivotal position with the drive beam (15) which causes a nearly linear motion in a vertical or horizontal manner on a predetermined ramp.    A shuttle embroidery machine according to claim 3, wherein the multi-link member pivotally attached to the crank driver (5, 7) comprises a four joint having three rocker arms (25, 31, 33). 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) A pivotal connection, and a free end of the link (7) is pivotally fitted to the first rocker arm (25) on the coupler (5, 7).    The shuttle embroidery machine of claim 4, wherein the link (7) is pivotally connected to the first rocker arm (25) and to the coupler (5).    The shuttle embroidery machine of claim 5, wherein the pivotal connection between the link (7) and the first rocker arm (25) is performed on the first rocker arm (25).    The shuttle embroidery machine of claim 4, wherein the connecting rod (7) comprises a respective joint (9, 17), respectively comprising two journals (11, 19) at right angles to each other, and The crank arm (5) is coupled to the first rocker arm (25), and the joint (9) (17) may be in the form of a cross joint.    The shuttle embroidery machine of claim 5, wherein the first rocker arm (25) is pivotally connected to a fastening component (21), and the connecting component is also pivotally connected to the fastening component (21). 7), and wherein the fastening element (21) is fixed to the drive beam (15).    A shuttle embroidery machine according to claim 1 or 2, wherein the crank drive (5, 7) is coupled to a two-arm lever that can be driven by an upright shaft that is driven by a spindle.    The shuttle embroidery machine of claim 3, wherein the crank driver (5, 7) and the rocker arm (25, 31, 33) fitted to the drive beam (15) are in a linear motion path The drive beam is guided, the motion path extending at an angle of +[alpha] or -[alpha] relative to the vertical.    For example, the shuttle embroidery machine of claim 1 or 2, wherein: a plurality of four joints carry and drive the drive beam (15) in a vibrating manner, and the drive beam (15) is pivotally connected to the four joints. The four joints are guided in a movement path that extends obliquely to the vertical line.    A shuttle embroidery machine according to claim 1 or 2, wherein at least two drive-and-guide means (1) are fitted to the drive beam at the spaced apart position on the drive beam (15). )on.    The shuttle embroidery machine of claim 12, wherein: the crank drives (5) (7) of the at least two drive and guide devices (1) are each connected to a two-arm lever, the two-arm lever can be A spindle drive that drives all crank drives.