TW201033430A - Two-needle sewing machine - Google Patents

Abstract

The two-needle sewing machine (1) has a needle-holding unit for receiving two needles (11,12). Two spaced gripper blocks are fixed at a lower shaft (31), where each gripper block bears one gripper interacting with one of the two needles during the stitch formation. A clamping screw is provided for fixing one of the two gripper blocks on the lower shaft.

Description

201033430 VI. Description of the Invention: [Technology of the Invention] The present invention relates to a double needle sewing machine having a needle receiving unit for receiving two sewing needles and two spacers fixedly attached to the bottom shaft Shuttle/fishing device (Greifer) support. With the double needle sewing machine, two-line sewing can be performed at a given pitch. If the distance between the two single stitches forming the double stitch is to be changed, the spacing between the two shuttle supports must be changed accordingly. '•明内】 * " The object of the invention is to achieve a distance adjustment of the type described above without having to subsequently synchronize the shuttle stroke with the needle stroke of the needle receiving unit. According to the invention, the object is achieved by having the scope of the patent application! The sewing machine is characterized by the features given in the item. ❿ (10) According to the present invention, even after the elastic HI screw is removed, the circumferential relative position of the hollow shaft synchronized with the shuttle tip with respect to the bottom shaft synchronized with the needle receiving unit is still complemented by the surface structure of the fastening screw complementary to the bottom shaft. The type and fixture are fixed. The circumferential relative position remains unchanged when the tightening screw is retightened so that the (two) shuttle bearings can be relatively free without having to resynchronize the shuttle and the needle bar. The invention has a sewing machine. In principle, however, the invention can also be used for multi-needle pain with a greater number of slits. In this case, a corresponding number of shuttles with shuttle supports, and a corresponding number of fastening screws and solids according to the invention are provided. According to the second aspect of the patent application, the fixing device f having a simple structure can be realized. _ It is also possible to realize a fastening device having a relatively simple fastening structure according to item 3 of the patent application. According to the fourth aspect of the patent application, the wall thickness reduction portion of the <extra-phase is allowed to be arranged in the case of the vacant space J with respect to the bottom-axis position. It has been found that the abutting faces in the embodiment according to the fifth and sixth aspects of the patent application are particularly suitable for ensuring that the circumferential direction of a green setting is relative to that of the design described in claim 7 of the patent application. The circumferential relative position remains constant along the entire axial adjustment area for the respective shuttle support. BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the invention are explained in detail below with reference to the drawings. Wherein: Figure 1 shows a view of the working side of a double-needle sewing machine, in which the machine table is omitted to show the parts mounted in the substrate; Figure 2 shows a perspective view of the double-needle sewing machine according to Figure 1. Figure 3 shows the enlarged needle bar shifting element of the sewing machine according to the viewing direction according to Fig. 1, wherein both of the needle bars are at the top dead center and are in the engaged sewing state; Fig. 4 is from Fig. 3 The observation direction IV shows the view of the needle bar switching element. FIG. 5 shows the view of the needle bar switching element from the observation side V in FIG. 4, and the figure 6 is similar to the view of FIG. The assembly is illustrated in which the left needle bar is accessed in the bottom dead center region and the right needle bar is removed; Figure 7 shows the needle bar in the switched state according to Figure 6 in a view similar to Figure 4 The switching element; Fig. 8 shows the needle bar switching element in a view similar to Fig. 6, wherein the needle bar is shown in a position in which the oscillating motion is transmitted according to the implementation of the needle, and the needle bar switching is omitted as compared with Fig. 6. Several components of the component; Figure 9 shows the needle transmission according to Figure 8 in a view similar to Figure 7 a needle bar switching assembly in position; - Fig. 10 shows a partial enlarged view of a region X in Fig. 9; the second drawing shows a needle bar switching according to a needle transmitting oscillating motion in a view similar to Fig. 8 Figure 12 is a view similar to Fig. 7 showing the needle bar switching assembly in the needle transfer position according to Fig. 11; φ Fig. 13 is a partially enlarged view showing a region XIII in Fig. 12; Figure 14 shows the needle bar shifting element in a view similar to Figure 4, wherein "P is omitted as a component, is truncated in the region of the thrust shaft/drive shaft and is partially cut open; 15 is a magnified view of the partial XV in Fig. 14; Fig. 16 is a view showing the components according to the viewing direction XVI in Fig. 14; and Fig. 17 is a view showing the connecting rod/link of the needle bar transporting device of the sewing machine A perspective view of the mechanism in the transfer position of the drawbar; ^ 18 ISI ~ _ no side view of the link system according to Fig. 17 viewed from the viewing direction parallel to the longitudinal axis of the thrust axis; Figure 19 shows A cross-sectional view according to line XIX - XIX in Fig. 18; Fig. 20 is a view similar to Fig. 17 The figure shows a linkage system in which the tie rod is shown in the inoperative position; Figure 21 shows the linkage system in the position according to Fig. 20 in a view similar to Fig. 18; In the cross-sectional view of line XXII - XXII in Fig. 21, Fig. 23 shows the link system in a view similar to Fig. 20, in which the fixing bolt of the needle bar of the link system is loosened; The view similar to Fig. 21 shows the link system in the position according to Fig. 23; Fig. 25 shows a perspective view of the shuttle drive assembly of the sewing machine; and Fig. 26 shows the shuttle/hook device ( Greifer) perspective view of the shaft arrangement of the drive element, Fig. 27 shows a side view of the shaft arrangement according to Fig. 26; Fig. 28 shows the shaft arrangement according to the line XXVIII - XXVIII of Fig. 27 Fig. 29 shows a partial detail XXIX in Fig. 28; Fig. 30 shows a cross-sectional view according to line XXX-XXX in Fig. 27; Fig. 31 shows a line XXXI-XXXI according to Fig. 27 A cross-sectional view, Fig. 32 shows a first boundary position for swinging the adjustment hollow shaft in a view similar to Fig. 31 a centered shaft arrangement, the swing adjustment is used to set the needle bar stroke (2010), and the 33rd view is shown in a view similar to the 31st view in the opposite boundary position for the swing adjustment hollow shaft. A shaft arrangement, the swing adjustment is used to set the needle bar stroke; Fig. 34 is a cross-sectional view according to the line XXXIV - XXXIV in Fig. 30; Fig. 35 is a partial detail XXXV in Fig. 34; Fig. 36 A perspective view showing the secant assembly of the sewing machine; Fig. 37 shows a plan view of the secant assembly cut away in the region of the cutting force adjusting bolt; Fig. 38 shows the secant according to the viewing direction XXXVIII in Fig. 37 Side view of the component; Figure 39 shows the secant element in the knives arrangement by the position of the slashing knife/line squeegee (Fadenziehmesser) after secant relative to the corresponding knives/reverse knives a partial enlarged view in the structural region; Fig. 40 shows a partial detail XL in Fig. 39; Fig. 41 shows an internal detail exposed in the region of the cutting force adjusting bolt in a view similar to Fig. 39; Figure 42 shows A top view of the knife arrangement in the relative position according to Fig. 39; Fig. 43 is a perspective view of the knife arrangement of the secant element shown with the relative position of the wire cutter relative to the corresponding knife before the secant; Fig. 44 The view similar to Fig. 39 shows the knife arrangement in the relative position according to Fig. 43; 7 201033430 Fig. 45 shows the detail XLV in Fig. 44; Fig. 46 shows the view similar to Fig. 42 The figure shows the blade arrangement in the relative position according to Fig. 43; Fig. 47 shows a partial perspective view of the blade arrangement along the viewing direction of the cutting force adjustment bolt; Fig. 48 shows the cutting force with the wire blade The knife arrangement is shown with respect to the relative position of the corresponding knife; Fig. 49 shows the knife arrangement in the relative position according to Fig. 48 in a view similar to Fig. 44; Fig. 50 shows at the 49th Detail L in the figure; Fig. 51 shows the blade arrangement in the relative position according to Fig. 48 in a view similar to Fig. 46; Fig. 52 is shown in a view similar to Fig. 47 Arrangement in the relative position of Fig. 48; Fig. 53 from obliquely below The viewing direction of the lower clip/clamping mechanism is shown in a perspective view of the knife arrangement in the relative position according to Fig. 39, in which the corresponding knife is omitted; Fig. 54 is shown in a view similar to Fig. 39. The arranging structure of the clamp preloaded by the clamping force adjustment bolt; Fig. 55 is a view showing the viewing direction LV according to Fig. 54 in the viewing direction of the cut of the exposed clamping force adjusting bolt; Fig. 56 The knives arrangement structure in the relative position of the wire cutter relative to the corresponding blade and the wire clamping force relative to the lower wire clamp is shown; Figure 7 is a view similar to 5 4 in the relative position according to Figure 5 Position 201033430 centered knife arrangement; Fig. 58 shows the knife arrangement in a view similar to 55, wherein the detent adjustment bolt engages the clamp; Fig. 59 shows the area of the lower clamp in Fig. 58 a partial enlarged view of the middle; FIG. 60 is a partial perspective view of the substrate viewed obliquely from the needle plate and the two needle plates adjacent to the needle plate; FIG. 61 is a view of the substrate according to FIG. a top view of the section;

Fig. 62 is a sectional view showing a line LXII - LXII according to Fig. 61; Fig. 63 is a view showing a detail LXII in Fig. 62 in a fixed position, and a movement is shown on the right side in Fig. 61; The block cannot be carried out with respect to the substrate. The figure 64 shows the detail according to Fig. 63 in a release position, wherein the slider can be relatively moved relative to the substrate; the panel Fig. 65 shows the line according to Fig. 61. LXV — A cross-sectional view of the LXV.

Figure 66 shows the detail LXVI in Figure 65. t The double needle sewing machine 主要 showing the main components in Figs. 1 and 2 has an upper arm 2, a vertical upright 3 and a lower body in the form of a substrate 4. A spindle is rotatably supported in the arm 2, and the spindle axis 5 of the spindle is indicated in Figs. In Fig. 14, the main line and the line are shown by the intersection of two auxiliary lines "and 5b." The body 7 of the sewing machine 1 and the base plate 4 are the parts of the frame of the sewing machine 1 through a pair of women's arms in the arm 2 The drive motor in the drive to drive the main vehicle, and then to sway 9 201033430 seam 'the main seam cutting part of the blade machine 1. Other seaming parts are driven by the belt drive mechanism not shown in detail.) The spindle and the form are the mechanism 8 The transmission mechanism (shown in further detail in Figures 3 to 6) can drive the needle bar 9, 1 登 up and down straight. The needle bar shown on the left in Figure 1 is hereinafter referred to as Figure 5 The needle bar shown on the right side in Fig. 1 is indicated by 1 reference numeral 1G. The needle bars 9, 1G are respectively provided with a - pin u, l2. The needle is 9 1G - formed for two Needle receiving unit for the needles u, 12. In the embodiment of the sewing machine 1 not shown, a single needle receiving unit for receiving the two needles u and 12 may be provided instead of the two needle bars 9, 10 Below the needle cups 9, 10, a needle plate 14 screwed to the support plate 13 is provided in the upper support plate/seat plate 13 of the substrate 4. The needle plate 14 is in the (6) and "The details in the figure are not shown. The needle plate 14 has two moving member openings α 16 , 17 extending in the sewing direction 15 (see Figures 2 and 61), the opening member opening for providing two moving material segments 18, The moving parts of 19 are passed through, and the moving parts are used for conveying the sewing material 1 below. The material sections 18' 19 each have a pinhole 20, 21 for the corresponding needles 11, 12 to pass through. The sewing material is held from above by the presser foot 22 during the sewing process. The presser foot 22 can be electromagnetically formed/lifted by the electromagnetic drive mechanism 23 (see Fig. 1). During the sewing process, it is optional to use the feed member sections 18, 19 or the needles 11, 12 that pierce the sewing material to move the seam between the needle plate 14 and the presser foot 22 forward. The sewing machine 1 can be operated by means of the following transfer or by means of needle transfer. Below the needle plate 14, a shuttle assembly 24 is provided in the base plate 4, the entire assembly of the shuttle 201033430 and the shuttles 25, 26 spaced apart from each other are shown in Fig. 25. In the sewing machine 1, the distance between the shuttles 25, 26 varies, and thus the distance between the stitches sewn by the needles 11, 12 and the corresponding shuttles 25, 26 can vary between a few millimeters and tens of millimeters. In the range. The shuttle tip 27 of the shuttles 25, 26 cooperates with the movement of the needles U, 12 to form a stitch, wherein a stitch of a face line (not shown) is formed by the needle movement, and the shuttle tip 27 grasps the stitch . The shuttles 25, 26 are designed as shuttles that rotate about an axis that is parallel to each other and have a needle housing 28 for storing the bottom line, which is provided in the form of a bobbin. When the stitch is formed, one of the two bottom threads provided by the shuttles 25, 26 is knotted/kinked with one of the upper threads provided by the two needles 11, 12. Both of the upper threads are provided by a bobbin not shown in the drawings and are tensioned in a defined and adjustable manner by the upper thread tensioning device 29 (see Figures 1 and 2), which is tensioned. The device is mounted on the mounting plate of the arm 2. A needle gauge actuator mechanism 30 is used to drive a feed member having a feed member section 18, 19 which can be seen in the area of the substrate 4 in Fig. 1. The shuttles 25, 26 are rotatably driven by a lower shaft 31 and a steering gear, which are mounted in the shuttle drive housings 32, 33 associated with the shuttles 25, 26, respectively. Two secant elements are used to cut the upper and lower threads, one of which is shown in the entirety in Fig. 36, wherein the cutting cam body 35 can be seen in Figures 1 and 2, The cutting cam body can be turned on by a stroke electromagnet 36 to operate the wire scraper 37 (see Fig. 36). 11 201033430 The cutting and squeezing 35 material phase series (4) mode and the upper line:: r-two-one needle bar switching element 39 switching device 38 needle bar 9, 10 of the sewing work, Stopping the two in the same direction - the needle bar switching element as a whole is not shown in Figures 3 to 7 and in detail in Figures 8 to 16, the device 38 can be cut between the three working conditions of the sewing machine, Make the conversion. In the position of the switching device 38 not shown in the figure, both of the needle bars 9, 10 are

Access, ie participate in _ work. In the position of the switching skirt % shown in Figs. 6 to 12, the left needle bar 9 is engaged, i.e., participates in the sewing work and the right needle bar is removed, i.e., remains stationary in the top dead center region. In the location. Correspondingly, a third working position can also be formed by the switching device 38, wherein the right needle bar 10 is accessed and the left needle bar 9 is removed. The basic principle of operation of this type of switching device is known from DEps 955 023.

The switching cam/contact cam 40 is used to switch the switching device 38 between three operating states. In the working position in which the two needle bars 9, 1 are accessed, the switching cam 40 is between the two switching levers/contact bars 41, which are respectively disposed on the upper ends of the two needle bars 9, 10. In the respective removal positions of the switching device 38 which are each removed from one of the two needle bars 9, 10, the switching cam 4 〇 passes the lower switching action surface (see FIGS. 10 and 13) and the corresponding needle bar The switching levers 41 on the switching end/contact end 43 cooperate. A manually actuable steering element 45 (see Fig. 3) is used to move the switching cam 40 between its different switching positions, the steering element 45 having a switching handle 46 and 12 201033430 a reset handle 47. The operating element 45 - the lever / the rap 5 heart ★ consuming 48, the switching lever 49 and the Fig. 10 diagram are mechanically coupled to the switching cam. 51 (1 = 49 is provided in the region hinged with the leveling shaft 48 - re-fixing plan = Fig.)" The return spring 51 and the stop element 52 are co-operated. The lever end 53 of the spring 51 abuts against the stop unit door ΦρΪ2 includes a lever 54 for switching the intermediate position of the cam 4G between the two switching levers 41.

The square A! 胄, the device 5 5 is used to move the needle bar 9, 10 in the direction of the pull or the transfer during the period, i.e. for needle transport, the needle transfer device 55 needle 2, for example in Figures 3 and 5 Towel ^. The conveyance is carried out by swinging the swing shaft (four), which is in the form of a needle bar 9 and a rocker. The swinging post 7 is parallel to the support plate 13. The pivot axis 57 is at a distance greater than (7) from the switching cam, and is several meters apart in the illustrated embodiment. The oscillation about the swing axis 57 is driven by the thrust shaft % extending from the swing axis 57. The needle bar side end portion of the thrust shaft 58 is connected to the guide rocking plate 56 in a non-phase (four) motion. The guiding rocker 56 has an upper guiding section 59 which is connected to the lower guiding section 6G. The τ bow guide section 6 () is in turn connected to the thrust (four) by a manipulator arm 61 in a rotationally fixed manner. The switching cam 40 is designed in such a manner (see Figs. 1 and 13) that the switching action surface 42 follows the (four) motion of the needle end portion 43 of the needle bar. Here, the switching cam 4 shown in Fig. 10 is in the needle transfer position at the end of the needle transfer process at the switching end, that is, at the needle side end portion 44 of a needle bar 9, 在15 is in the position with the largest offset. First, the cutting cam 13 201033430 The position of the shifting portion 43 corresponding to the needle shift is in the direction opposite to the sewing direction 15 and the maximum deviation of the rod is around a switching cam frame 6 parallel to the swing axis 57. 2, the swinging support is supported on the switching cam support 2 fixed on the body for the switching operation of the switching cam 4〇, the closing lever 50 passes through the follower/joint member 64 and the control groove & The switching cam 4G cooperates, and the follower is fixedly coupled to the switch lever 50. 2 = the slip of the sample and the switching cam side wraps the cam swing axis 62.

Position-independently, a reliable actuation connection is ensured between the switching lever 50 and the switching cam 4〇. The switch #50 is connected to the switch lever 49 via a reset magazine 66 (see, for example, Fig. 7). The return spring 66 ensures that when the switching cam is encountered in the lateral direction...the switching lever 41 of the ^9, 1〇, the switching of the switching cam 4G can be avoided against the pre- I of the return spring 6 The actuating motion of the rod 41 until [10] the rod 41 has moved through the corresponding needle bar 9, _ initial motion

Move to ^ to shift the switching cam 4 到 to the switching position above the switching lever 4丨. The detailed structure of the crank transmission mechanism 8 for the upper and lower slit operation of the needle bars 9, 1 is shown by means of Figs. 3 to 16. The crank transmission mechanism 8 includes a slider/crosshead type follower 67 that can be driven up and down, and the follower 67 (shown, for example, in Fig. 5) is in the sewing state of the corresponding needle bar 9, 1 Downward, axially fixed between an upper running stop and a lower running stop 69 switchable by means of a switching device 38 for each of the two needle bars 9, 1 One is designed as a retaining ring 68. Each of the lower running stops includes three stops 14 201033430 balls 70 that are pushed to a stop position when the switching lever 41 is released. In the stop position, the stop ball 7 〇 extends outwardly beyond the corresponding needle bar 9 , the outer shell of the 〇 , so that the resulting effective outer diameter of the needles #9, 10 is greater than the corresponding needle bar of the slider 67 The inner diameter of the guiding device. Each of the two retaining rings 68 is axially fixed to the corresponding needle bar 9, 1 by a fastening bolt. The retaining ring 68 acts as an upper running stop for the slider 67. The slider 67 is drivingly coupled to the spindle by a crank 71 (see, for example, the spindle axis 5 in Fig. 5). The upper guide section 59 of the guide rocker 56 has a lower guide rib 72 (see, for example, Fig. 5). The lower guiding section 6 of the guiding rocker 56 has an upper guiding edge. The upper guide ribs 73 are spaced apart below the lower guide rib 72. The switching device 38 is provided with a switchable lower stationary stop 74 for each of the two needle bars 9, 1 , which can be set to a stop by manipulating the corresponding switching lever 41 Displacement position (see Fig. 16) Each of the two lower stationary stops 74 includes two stop balls 70 of the stop ball type of the lower running stop. The stop of the lower stationary stop 74 The ball 7 共同 interacts with the inner chamfer of the upper guide rib 73 of the lower guide section 60 in the stop position, in which the stop ball projects outwardly again with the corresponding needle bar 9 , 1 Outside the outer casing wall of the crucible. In the stationary state, that is, in the removed state of the shift lever 41, the removed needle bars 9, 10 are between the upper stationary stop 75 and the switchable lower stationary stop 74. It is axially fixed to the guiding rocker 56 (see Fig. 16). The upper stationary stop 75 is given by the upper edge of the corresponding retaining ring 68. By manipulating the corresponding switching lever 41 it is possible in a settling non-working position 15 201033430 Switching the stop ball 70 between the stop positions, in which the stop ball does not have a stop In the stop position, the stop ball 70 projects beyond the outer wall of the respective needle bar 9 , 10 and has a stop action. With regard to the lower stationary stop 74 , the stop action means The ball 70 abuts against the upper guide rib 73 of the lower guide section 6 of the guide rocker 56. With regard to the lower running stop 69, the stop action means that the stop ball 7 〇 rests against the slider 67. In the stop position of the lower running stop 69 or the lower stationary stop 74 which projects outwardly from the outer wall of the respective needle bar 9, 1 , the stop ball 7 is elastically oriented towards the stop position Correspondingly, the lower stationary stop 74 is designed such that the said stationary stop is resiliently biased towards the correspondingly displaced needle bar 9 , 1 towards the upper stationary stop 75. The needle bar 9 and/or (1) must be operated in such a way that the upper edge of the retaining ring 68 does not abut against the lower guide rib 72. This ensures that: in the top dead center of the slider 67 which is interlocked with the retaining ring 68, The distance of the lower guiding edge 72 of the upper guiding section 59 of the guiding rocker 56 from the upper edge of the retaining ring 68 must be precisely defined. This also ensures that the slider 67 is not pinched at the needle bar 9, 1 When it comes out, it hits the gear ring clamped between the upper stationary stop 75 and the lower stationary stop 74. A distance adjusting device 76 is used to adjust the distance, and the distance adjusting device 76 is designed to be eccentrically The adjusting device 'this is shown in detail in Fig. 15. The pivot axis 57 of the thrust shaft 58 (shown as the two auxiliary lines 57a and still intersections in Fig. 15) is eccentric from the level of the spindle axis 5 The amount E (see the auxiliary line 5a in Fig. 15). The position of the guide rocker 56 can be adjusted by adjusting the position of the thrust shaft 56 with respect to the position of the needle bar 9, 1 垂直 in the vertical direction, thereby adjusting the guidance. The lower guiding edge 72 of the upper guiding section 59 of the jaw 56 is at a distance from the upper guiding edge of the slider 67 towards the lower guiding edge 72. The distance of the 16 201033430 is greater than the thickness of the retaining ring 68 in the axial direction along the needle bars 9, 10. In the illustrated embodiment, the eccentricity E is 0.2 mm, i.e., less than 1 mm.

Figures 17 through 24 illustrate the jaw members of the needle transfer device 55 in the form of a linkage 77. The link 77 is mounted in the column 3 of the sewing machine 1. The link 77 has a drive rod 78 that is coupled to the drive shaft 79 of the pitch 5 of the pitch actuator 30 that extends parallel to the thrust shaft 58 in a rotationally fixed manner. The drive rod 78 is coupled to a pull rod 81 by a first hinge mechanism 80. The pull rod 81 is hinged to a needle feed lever 83 by another hinge mechanism 82 in the form of an articulated bolt unit. The needle feed lever is coupled to the thrust shaft 58 in a non-rotatable manner on the end opposite the hinge axis 82a of the other hinge mechanism 82 (see Fig. 19). The needle transfer adjustment wiper of the link train 77 (shown in Figs. 17 to 19) realizes that the intermittent movement of the rotary shaft 79 is converted into the swing assist of the drive lever 78 (see double arrow) and correspondingly converted into a feed. The oscillating motion of the needle bar 83 (see double arrow 85). Accordingly, the thrust shaft % is intermittently driven to cause the needle transfer levers 9, 1G to perform a swing transmission motion between, for example, two transfer positions shown in Figs. Figures 20 through 22 illustrate the inoperative position of the linkage 77 in which the needle transport I is set to 55. In the inoperative position, the rotary 81* lancet μ is applied to make the needle bar still stationary even when the drive lever 78 is oscillated (10). In the inoperative position, the needle bar 83 is fixedly coupled to the frame member 85& of the slot machine by means of hinge bolts 82. 17 201033430 A slide pin 87 on the needle bar 83 and an elongated hole 88 formed in the pull rod 81. The slide pin 87 is pressed into the needle feed lever 83. The elongated hole 88 is designed as a guide fork of the pull rod 81. Due to the elongated hole/pin connection structure 86, the longitudinal movement of the tie rod 81 (see double arrow 89) is idle (without other parts), while at the same time ensuring that the pull rod 81 is on the needle feed bar 83. 23 and 24 show the switching position of the link 77 for switching the link between the transfer position shown in Figs. 17 to 19 and the non-operating position shown in Figs. 2 to 22. system. Here, the hinge bolt unit 82 is detached. In Fig. 24, the needle feed lever 83 can be swung clockwise from the fixed position shown in Figs. 2 to 22 until the position of the women's wear shown in Figs. 23 and 24 is reached. In the mounted position, the slide pin 87 is not engaged with the elongated hole 88, so that the tie rod can be switched between the inoperative position shown in Figs. 20 to 24 and the transfer position shown in Figs. The shuttle assembly 24 is illustrated below with the aid of Figures 25 to 35, which in addition to the two shuttles 25, 26 also include a shuttle drive assembly. The two shuttles 25' 26 are supported by the shuttle supports 90, 91, respectively. Here, the shuttle support is located on the shuttle 25 and the needle bar 9 and is part of the shuttle drive mechanism housing 32. The shuttle support 9! is part of the shuttle 26 and the needle bar and is part of the phantom of the shuttle drive mechanism. Figures 26 to 35 show the bottom shaft 31 and the components of the women's clothing on the bottom shaft in the region of the shuttle support 9 turns. There is a corresponding 180 in the region of the shuttle support 91 with respect to the vertical axis. Rotating symmetrical arrangement. The two shuttle supports 90, 91 are fixed to the bottom shaft 31 at intervals spaced apart from each other, and the bottom shaft rotates in synchronism with the movement of the needles U, 12, i.e., in the main step. 18 201033430 In the respective regions of the two shuttle supports 90, 91, the bottom shaft 31 is respectively surrounded by hollow shaft segments 92, 93 which are respectively connected to the bottom shaft 31 in a rotationally fixed manner. The bevel gears 94 (see FIGS. 26 to 28) are connected in a rotationally fixed manner to the respective hollow shaft sections 92, 93, respectively, and the hollow shaft sections 92, 93 pass through a shuttle drive shaft and the corresponding shuttle 25 , 26 forms a drive connection. That is, each of the hollow shaft segments 92, 93 rotates in synchronism with the respective shuttles 25, 26, respectively. A fastening screw 95 is used to secure the shuttle bearings 90, 91 to the bottom shaft 31. The fastening screws are tightened radially through the adjustment sleeves 96 surrounding the respective hollow shaft segments 92, 93. To this end, the adjustment sleeve 96 has a radially internal thread that is complementary to the external thread of the screw 95. Each of the two adjustment sleeves 96 is assigned to one of the two shuttle supports 9, 91, 91 and is fixed thereto. The fastening section of the screw 9 5 having the end-side fastening faces 197 passes through the through-openings 98 of the respective hollow shaft sections 92,93. As shown in Fig. 28 and Figs. 31 to 33, the through holes 98 do not allow the corresponding hollow shaft segments 92, 93 to have an axial play, but allow for play in the circumferential direction about the bottom shaft axis 98a. The abutment surface 99, which is complementary to the fastening surface, is situated in the housing wall 1 of the lower shaft 31, for example, as a face milling. Instead of a planar design, the mating face 99 can be designed as a "V" slot. In summary, the abutment surface 99 is not designed to be rotationally symmetrical about the axis of rotation 98a of the bottom shaft 31. The adjustment sleeve 96 is part of a fixing device for maintaining the respective hollow shaft segments 92, 93 about the axis of rotation 98a relative to the fastening surface 97 of the fastening screw 95 when the fastening surface 95 is detached from the abutment surface 99. The circumferential relative position of the fastening screw 95 19 201033430. In addition to the adjustment sleeve 96, the fixed skirt 1G1 also includes two additional fastening screws 1〇2. The fastening screw is a stop that secures the adjustment sleeve 96 in its circumferentially opposite position relative to the respective hollow shaft segments 92,93. The two tightenings are respectively passed through the _ and the groove of the sleeve 96, and the internal thread is complementary to the external thread of the corresponding fastening screw 1G2. The fastening faces of the end faces of the fastening screws are abutted against the outer casing wall 104 of the respective hollow shaft sections 92,93. The regions of the hollow shaft segments %, 93 which correspond to the respective fastening screws 102 are adjacently adjacent to each other' are provided in the respective hollow shaft segments 92, 93 in the form of wall thickness reductions of the recesses 105. The length of the abutment surface 99 along the axis of rotation 98a of the bottom shaft 31 is indicated by T in the first egg. In the relative position (shown in Fig. 28) of the tighter lever 95 with respect to the recording 31_, the abutting faces 99 project outwardly to the left and right of the fastening screw 95 in the axial direction - possible axes To the moving distance "u,, at the height of the (four) of the fastening screw 95, the outer wall thickness increase portion has a form of the surrounding boss l〇5a. By loosening the corresponding fastening screw 95' can move the respective shuttle support 9〇91 axially relative to the bottom shaft 31, so that the spacing between the two shuttle tips 27 can be adjusted in particular, since the corresponding hollow shaft segments 92, % pass The sleeve 96 and the two further fastening screws are connected to the fastening screw so that the circumferential position of the fastening screw % relative to the bottom shaft 基于 is based on the complementation of the faces π, 99 to each other during adjustment The relative position of the corresponding air shaft segments 92, 93 with respect to the bottom shaft 31 is unchanged. Thus, between the two shuttle bearings 9G, 91 is adjusted, 201033430 clear 95 reading _ Shuttle _ synchronized with the needle # stroke of the needle bar to accurately grasp the upper thread. As shown in Figures 32 and 33, in order to adjust the needle bar Cheng Zhao may surround a wire from rotating ^ - _ this angle to the direction of circumferential ¥ for - regulating the respective hollow shaft segment Γ 32_ The first intermediate position from Figure 31 in the first

Tune: and Figure 33 shows the inverse adjustment of the same value V 5 in an opposite circumferential direction. Depending on the adjustment value V, the synchronization of the position of the needle bar stroke 27 with the needle bar stroke of the respective needle bar 9, 1 can be varied and thus adjusted. The recesses 1〇5 prevent contact with the fastening surface 1_b_ebs in the outer edge region of the fastening surface 〇3 of the respective fastening screw 1〇2, thereby preventing fastening in tightening The screw 102 is inadvertently rotated relative to the bottom shaft 31 by the corresponding hollow shaft segments 92, 93. The fixing bolts i 〇 6 are also detached before the corresponding shuttle yokes 90, 91 are moved, and the shuttle yokes 91, 91 are screwed to the base plate 4 on the gantry side by the fixing bolts 1 〇 6. _ In addition to the bevel gears 94 mounted on the respective hollow shaft sections 92, 93, disc cams 1 〇 7 of the bobbin case openers are respectively mounted. In the region of the shuttle bearings 90, 91, the bottom shaft 31 is supported by a bearing 108, respectively. Figures 36 to 59 show the secant element 34 in its entirety or in sub-elements. In the activated position of the lift electromagnet 36, the cutting motion of the scraper blade 37 is caused by rolling a follower body 1〇9 on the cutting cam 11〇 of the cutting cam body 35. The follower body 109 is operatively coupled to the lift head 112 of the stroke electromagnet 36 and the wire scraper 37 via a transmission element Hi (see Fig. 36). The transmission element 111 21 201033430 is supported in a manner fixed to the body such that the transmission element can be rotated about a shaft section 113 of the transmission element 111. In addition to the scraper blade 37 in the form of a movable secant knife, the securing device 114 of the secant member 34 further includes a corresponding knife 115 that is securely attached to the frame of the sewing machine 1 by the respective shuttle supports 90, 91. Figures 39 and 40 show the secant device 114 immediately after the secant is performed. The cutting edge 116 of the scraper blade 37 cooperates with the corresponding edge/reverse edge of the corresponding blade 115 at the time of secant. The cutting edge 116 is defined by a slab of the squeegee 37 and a cutting wall section 119 of the upper squeegee wall 119a of the squeegee 37, which is cut by the squeegee section 119 and the squeegee 37 The motion planes in motion 12〇 (see Figure 40) coincide. On the opposite side of the cutting blade 116, i.e. on the side opposite the cutting wall section 119, the scraping blade wall 119a transitions to a partition wall section 121 spaced from the moving plane 120. The partition wall section 121 is formed by concavely grinding the upper wire cutter wall U9a. Due to the partition wall section 121, the wire cutter is in contact with the corresponding knife 115 only in the vicinity of the cutting edge 116 at the time of secant, and the wire cutter moves in correspondence with the movement arrow 122 in Fig. 42 at the time of secant. The distance A of the partition wall section 121 from the plane of motion 12 (see Figure 4) increases in a mathematically strictly monotonous manner as the distance of the partition wall section 121 from the cutting edge 116 increases. An adjustment area 123 adjacent to the cutting edge 116 is provided on the partition wall section 121 (see Fig. 50). The adjustment area is indicated in Figure 5 by two vertical short boundaries extending downwardly from the partition wall 121. The distance b of the adjustment region 123 from the cutting blade 116 (see Fig. 5) is set such that when the wire scraper 37 is in the adjustment region 123 without force, i.e. without pressure, it abuts 22 201033430 in the corresponding knife On top of 115, there is a correct cutting force, i.e., the correct cutting pressure, which is applied to the corresponding knife 115 by the wire scraper 37 on the cutting edge 116 when the wire is cut. The adjustment area 123 is marked on the upper wire cutter wall 119a by laser marking. The correct cutting pressure for the secant is established based on the overcut/coincidence/intersection (see Fig. 50) between the height of the corresponding edge 117 in the adjustment zone 123 and the height of the cutting edge 116. To adjust the cutting force, a corresponding knife 115 can be moved between a plurality of corresponding knife positions corresponding to the distance of the different corresponding edges 117 from the motion Φ plane 120, i.e., a different overcut C. To this end, the corresponding knife 115 is movable between different pivoting positions about the pivot joint 124 having the pivot axis 125 and can be fixed by the fixing bolt 126, ie by the cutting force adjustment bolt, so that a given cutting force is fixed. change. The fixing bolts 126 are simultaneously used to fix the corresponding blades 115 to the corresponding knife holders 127 and to the frame of the sewing machine 1 via the respective shuttle holders 90, 91. By loosening the fixing bolts 126, the corresponding knife 115 is allowed to be positioned relative to the corresponding knife holder 127 along the direction of motion indicated by the double arrow 128 in Fig. 42. In the positioning direction ® 128, the axial relative positioning of the corresponding knife 115 can also be performed along the pivot axis 125. The oscillating joint 124 has an articulated shaft with a hinge axis 129. The corresponding knife 115 is fixed to the hinge shaft by a fastening bolt 130. In order to adjust the cutting force, the fixing bolt 126 is first loosened. The wire scraper 37 is then moved relative to the corresponding knife 115 until the corresponding knife in is opposed to the adjustment area 123 on the upper wire cutter wall 119a. Then, the corresponding knife 115 is swung up about the swing axis 125 until the corresponding edge 117 is in the center of the adjustment area 123, and under the condition of no load on 23 201033430, it abuts against the upper scraper wall 119& Then, tighten the fixing bolt 126 while maintaining the corresponding knife position. When the secant is performed, first, the squeegee 37 is in the position shown in Figs. 43 to 47. Due to the concave grinding in the partition wall section 121, the scraper blade 37 does not start to come into contact with the corresponding blade 115. This is also the case at the beginning of the secant movement of the squeegee 37 until the squeegee 37 is moved relative to the corresponding knives 115 to the extent that the squeegee 37 is in contact with the corresponding blade 135 in the adjustment zone 123. In the other movement of the wire scraper 37, a predetermined cutting force is established based on the overcut C, so that when the cutting blade 116 of the wire scraper 37 passes the corresponding blade in of the corresponding blade 115, the cutting line is correctly performed. The concave grinding of the partition wall section 121 allows the first moving section of the scraping blade 37 to easily pass during the cutting movement. The secant device 114 has a wire clamp 131 made of an elastic material such as spring steel in addition to the wire scraper 37 and the corresponding blade 115. The clip cooperates with the scraper blades 7-7 to form a counterpart to cooperate to grip the line cut between the scraper blade 37 and the corresponding knife 115. The clamp 131 is designed as a leaf spring and has a retaining spring end 132 (see Fig. 59) and a free clamping end 133' with which the clamp 131 is fixed for use as a support The body corresponds to the knife holder 127. The adjusting member 134 shown, for example, in Fig. 55 is for adjusting the clamping pressure of the wire clamp 131 with respect to the wire scraper 37. The adjustment member 134 can be moved and exert an adjustable pressure on the clamp 131 between the two spring ends 132, 133. The adjustment member 134 is designed to be screwed into the corresponding knife holder 127 and self-locking adjustment screw. 24 201033430 In the position according to Figures 53 to 55, the adjustment screw 134 is set in an inoperative position and is not engaged with the clamp 13丨. In the position, the gripping end 133 of the clip 131 abuts against the thread cutter 37 under a small thread tension as long as the scraper is located in the pocket of the secret. The adjustment elements 134 that engage the clip 131 are illustrated in FIGS. 56-59. The clamp 131 is lifted from the support wall 135 of the corresponding blade holder 127 between the retaining spring end 132 and the pinched end 133 by the action of the adjustment member 134, so that the wire cutter is clamped as long as it is in the position after the secant The end 133 is pressed strongly against the wire scraper 37. The load/stress between the clamp end 133 and the wire scraper 37 can be adjusted by the engagement strength of the adjustment member 134 with the wire clamp 131. This adjustment can be made in the clamping position of the wire clamp 131 with respect to the wire scraper 37. The figures 60 to 66 show the support plate 13 in the region of the needle plate 14 in detail. The needle plate 14 is fixed to the support plate 13 and further fixed to the substrate 4. The upper side of the needle plate 14 is flush with the upper side of the support plate 13 surrounding the needle plate. In Fig. 61, adjacent to the left and right sides of the needle plate 14, two needle plate sliders 136, 137 which can be removed from the support plate 13 are fixed to the support plate 13 and are fixed to the substrate 4. The upper sides of the two needle plate sliders 136, 137 are flush with the upper side of the needle plate n and flush with the upper side of the support plate 13 surrounding the needle plate sliders 136, 137. The two needle plate sliders 136, 137 form a cover member that can be removed from the seaming machine components, particularly the shuttles 25, 26, mounted in the substrate housing. The two needle plate sliders 136, 137 are prevented from moving relative to the support plate 13, and thus relative to the substrate 4, by a fixed structure 138 (see Figs. 63 and 64), respectively. The fixed structure 138 will be described below in conjunction with the needle plate slider 137 located on the right side in Fig. 61. Further, a fixing structure 138 is provided for the needle board slider 136 located on the left side in Fig. 61 in a manner symmetrical about the center of the midpoint between the two eyelets 2, 21. The fixed structure 138 has a locking projection 139 that secures the needle plate, and the locking projection is an integral section of the leaf spring 14 that is fixed to the needle plate slider 137. The leaf spring 140 is preloaded in the fixed position shown in Fig. 63. In the fixed position, the locking projection 139 engages the undercut of the locking groove 141. The locking four grooves 141 are a part of the locking plate 141a, which is fixed to the support plate 13 by a fixing inspection 141b, and is fixed to the substrate 4. The leaf spring 14 is mounted between the needle plate slider 137 and a clamp plate 142 which is movable relative to the needle plate slider in a manner perpendicular to the surface of the needle plate slider 137. In the fixed position of the fixed structure 138 (shown in Fig. 63), the needle plate slider 137 cannot move in the moving direction 143, i.e., cannot leave the needle plate 14. In this fixed position, relative movement of the needle plate slider 137 with respect to the support plate 13, and thus with respect to the substrate 4, is prevented. The fixed structure 138 can be switched between a fixed position and a released position (shown in Fig. 64) by a de-fixing structure 144 in which the needle plate slider 137 can be moved relative to the support plate π in the direction of motion 143 Further, it moves relative to the substrate 4. As shown in Fig. 64, the locking projection 139 is disengaged from the locking recess 141 in the release position. The de-fixing structure 144 is implemented by a de-fixing key which is accessible from the upper side of the support plate 13, and further from the upper side of the substrate 4, and cooperates with the locking projection 139. This interaction is achieved indirectly by de-fixing the structure 144 (in Figure 63) and by applying pressure from the top 26 by actuating 26 201033430, the clamping plate 142, and thus the piece with the locking projection 139 The cyanine 140 moves down to the release position (according to Fig. 64). Upon reaching the release position, the needle plate slider 137 can move with the de-fixing structure 144 in the direction of motion 143 relative to the support plate 13 and thereby away from the needle plate 14. When the needle plate slider 137 slides in the moving direction 143, the needle plate slider is guided on the support plate 13 and further on the substrate 4 by a guiding projection 146. The guiding means is formed by a guide groove 147 in the support plate 13, and thus in the substrate 4, into which the spring 148, which is part of the leaf spring 140, is engaged. Due to the elastic action of the leaf spring 140 in the guiding device 146, the corresponding adjusting bolt can be used to adjust the flushing position of the upper side of the needle plate slider 137 with respect to the upper side of the supporting plate 13. When the sewing machine 1 is assembled in the factory, a pin 149 is used as an auxiliary tool to adjust the play between the locking projection 139 and the locking groove 141 which passes through an aperture 15 〇 and a fitting hole 151 from above. Come through the needle plate slider 137 and the leaf spring 140. By the oscillating movement of the pin 149 (see the double arrow 152 of % in Fig. 62), in the case where the needle plate slider 贴37 abuts against the needle plate 14, <precisely predetermining the locking projection 139 in motion The distance from the locking groove 141 in the direction 143. The clamping plate 142 is screwed to the needle plate slider 137 by a fixing bolt 153. [Simple diagram of the figure] Fig. 1 shows a view of the working side of a double needle sewing machine, in which the machine table is omitted to show the parts mounted in the substrate; Fig. 2 shows the figure according to the figure i A perspective view of the double needle sewing machine; Fig. 3 shows the stitching machine needle stitching by the viewing direction according to Fig. 1; 2010 20103030 switching jaws, wherein both needle bars are at the top dead center and are in the sewing operation for access Fig. 4 is a view showing the needle bar switching member by the observation direction 1 in Fig. 3; Fig. 5 is a view showing the needle bar switching member by the observation direction V in Fig. 4; Fig. 6 is similar The view in Fig. 3 shows the assembly in which the left needle bar is accessed in the bottom dead center region and the right needle bar is removed; ❹ Figure 7 is shown in a view similar to Fig. 4 in accordance with Fig. 6. Needle bar shifting element in the switched state; Fig. 8 shows the needle bar shifting element in a view similar to Fig. 6, wherein the needle bar is shown in the positional towel according to the implementation of the needle transfer, and Fig. 6 Several parts of the needle bar switching element are omitted compared to Fig. 9; the figure is shown in a view similar to Fig. 7 at the root Figure 8 a needle position of the needle bar transfer switch assembly; 10 illustrates a partial region X in FIG. 9 in an enlarged view;

Figure 1 shows a needle bar shifting element according to the implementation of the needle transfer pendulum in a view similar to Figure 8; the figure of 12 is shown in a view similar to Figure 7 in the towel according to Figure 11 a needle bar switching assembly; Fig. 13 is a partial enlarged view of a region χπι in Fig. 12; a 1/1, 4 diagram showing a needle bar switching member in a view similar to Fig. 4, which goes to several The component 'cuts in the region of the thrust shaft/drive shaft (Subwelle) and is partially cut away; 28 201033430 Figure 15 shows an enlarged view of the partial XV in Figure 14; Figure 16 shows the direction of observation according to Figure 14 XVI shows a view of the components; Figure 17 shows a perspective view of the link/link mechanism of the sewing machine needle bar transporting device in the transfer position of the drawbar; Figure 18 shows the viewing direction parallel to the longitudinal axis of the thrust shaft A side view of the link system according to Fig. 17 is observed; Fig. 19 is a cross-sectional view according to the line XIX-XIX in Fig. 18; Fig. 20 is a view showing the link line in a view similar to Fig. 17. Where the drawbar is shown in the inoperative position; Figure 21 is shown in a view similar to Figure 18 in accordance with the 20th The link system in the position; Fig. 22 shows a cross-sectional view according to the line XXII - XXII in Fig. 21; Fig. 23 shows the link system in a view similar to Fig. 20, wherein the link system The fixing bolt of the needle feed bar is detached; Fig. 24 shows the link system in the position according to Fig. 23 in a view similar to Fig. 21; Fig. 25 shows the perspective of the shuttle drive assembly of the sewing machine Figure 26 is a perspective view showing the shaft arrangement of the Griifer drive member; Figure 27 is a side view showing the shaft arrangement according to Figure 26; and Figure 28 is showing the shaft arrangement The structure is according to the axial longitudinal sectional view of the line XXVIII - XXVIII in Fig. 27; the 29th part shows the partial detail XXIX in Fig. 28; 29 201033430 The 30th drawing shows the sectional view according to the line XXX - XXX in Fig. 27 31 is a cross-sectional view according to a line XXXI-XXXI in FIG. 27; FIG. 32 is a view showing an axis arrangement in a first-border position for swing-adjusting a hollow shaft in a view similar to FIG. The swing adjustment is used to set the needle stroke (Schleifenhub); Figure 33 is similar to the third 1 is a view showing the shaft arrangement in an opposite boundary position for swinging the adjustment hollow shaft, the swing adjustment for setting the needle stroke; β Figure 34 shows the line according to the third diagram XXXIV - XXXIV cross-sectional view; Fig. 35 shows partial detail XXXV in Fig. 34; Fig. 36 shows a perspective view of the secant assembly of the sewing machine; Fig. 37 shows the cutting force adjusting bolt of the secant assembly A top view of the cut in the region; Fig. 38 shows a side view of the secant element according to the viewing direction XXXVIII in Fig. 37; Fig. 39 is pulled by a wire cutter/line by a viewing direction similar to Fig. 38 The scraper (Fadenziehmesser) shows a partial enlarged view of the secant element in the region of the arranging structure relative to the position of the corresponding knives/reverse knives after secant; Fig. 40 shows the partial detail XL in Fig. 39; Fig. 41 The internal details exposed in the region of the cutting force adjustment bolt are shown in a view similar to Fig. 39; Fig. 42 shows a top view of the knife arrangement 30 201033430 in the relative position according to Fig. 39, Fig. 43 With a wire scraper before the secant A perspective view of the knives arrangement of the secant elements shown corresponding to the relative positions of the knives; Fig. 44 shows the arranging arrangement in the relative position according to Fig. 43 in a view similar to Fig. 39; Fig. 45 The detail XLV in Fig. 44 is shown; Fig. 46 shows the arranging structure in the relative position according to Fig. 43 in a view similar to Fig. 42; Fig. 47 shows the viewing direction of the adjusting bolt along the cutting force A partial perspective view showing the knife arrangement structure; Fig. 48 shows the knife arrangement structure with respect to the relative position of the wire cutter with respect to the corresponding knife when adjusting the cutting force; Fig. 49 is shown in a view similar to Fig. 44 The blade arrangement in the relative position according to Fig. 48; Fig. 50 shows the detail L in Fig. 49; Fig. 51 is shown in a position similar to Fig. 48 in the relative position according to Fig. 48 Knife arrangement structure; Fig. 52 shows the arrangement in the relative position according to Fig. 48 in a view similar to Fig. 47; Fig. 53 shows the observation direction of the lower clamp/clamping mechanism as viewed obliquely from below Perspective view of the knife arrangement in the relative position according to Fig. 39 Wherein the corresponding knife is omitted; Figure 54 shows a knife arrangement having a clamp preloaded by a clamping force adjustment bolt in a view similar to Fig. 39; 31 201033430 Figure 55 to expose the clamping force adjustment bolt The obscured viewing direction shows a view according to the viewing direction LV in Fig. 54; Fig. 56 shows the knife arrangement in the relative position of the wire cutter relative to the corresponding knife and the clamping force relative to the lower clamp Figure 57 is a view similar to 54 showing the knife arrangement in the relative position according to Fig. 56; Fig. 58 shows the knife arrangement in a view similar to 55, wherein the clamping force adjustment bolt Engaged with the clip; Fig. 59 shows a partial enlarged view of Fig. 58 in the area of the lower grip; Fig. 60 shows the area of the base on the needle plate and the two needle slides adjacent to the needle plate a partial perspective view from obliquely above; Fig. 61 shows a plan view of the substrate section according to Fig. 6; Fig. 62 shows a cross-sectional view according to line lxii - LXII in Fig. 61; Fig. 63 shows The fixed position shows the detail lxii in Fig. 62, where the figure 61 is The needle plate slider shown on the side cannot move phase with respect to the substrate; Fig. 64 shows the detail according to Fig. 63 in a release position, wherein the needle plate slider can be relatively moved with respect to the substrate; Fig. 65 shows A cross-sectional view of line LXV - LXV in Fig. 61; and Fig. 66 shows detail LXVI in Fig. 65. [Main component symbol description] 1···Double needle sewing machine 3...Post column 4...Substrate

2··. Upper arm 32 201033430 Reference 5... Spindle axis 36... Stroke solenoid 5a, 5b... Auxiliary line 37... Scraper 7... Body 38... Switching device 8.. Crank drive mechanism 39... Needle bar shifting member 9, 10... Needle bar 40... Cam/contact cam 11, 12... Needle 41... Rod/Tact bar 13... Upper support plate/seat plate 42... lower switching action surface 14... needle plate 43... switching end portion/contact end 15... sewing direction 45... steering element 16, 17... moving material opening 46... switching handle 18, 19...shifting member section 47...reset handle 20,21...pinhole 48...leveling axis 22...pressing foot 49...switching lever 23...electromagnetic drive mechanism 50...switching lever/ Starting lever 24... Shuttle assembly 51...Return spring 25, 26... Shuttle 52... Stop unit 27... Shuttle tip 53... Spring end 28... Needle housing 54.. Strut 29... upper thread tensioning device 55...needle conveying device 30...needle adjuster transmission mechanism 56...needle rod seat 31...bottom shaft 57...swing axis 32, 33... Shuttle drive mechanism housing 58··· Thrust shaft 34...Thread cutter group 59...Upper guide section 35...Cutting cam body 60...Lower guide section 33 201033430 61. . Longitudinal arm 62.. cam swing axis 63.. switch cam bracket 64.. follower/joint 65.. control groove 66...reset spring 67.. follower 68.. broadcast ring 69 .. . Lower running stop 70.. Stop tennis ball 71.. crank 72... Lower guiding edge 73.. Upper guiding edge 74.. Lower stationary stop 75.. Block 76... Distance adjustment device 77.. Linkage 78... Drive rod 79.. Drive shaft 80·.. First articulation mechanism 81.. Pull rod 82... Hinging mechanism 82a... Hinging axis 83.. Needle bar 84.. oscillating motion 85a... Rack component 86.. Long hole/pin connection structure 87.. Slide pin 88.. Long hole 90, 91... Shuttle Seat 92, 93... hollow shaft section 94.. bevel gear 95... screw 96.. sleeve 97.. fastening surface 98.. through hole 98a... bottom shaft axis 99.. Face 100.. . Shell wall 101.. Fixing device 102.. fastening screw 103.. fastening surface 104.. casing wall 105.. notch 105a... boss 106.. fixed Bolt 107.. Disc cam 108.. Bearing 34 201033430 109.. Follower body 110.. Cutting cam 111.. Transmission element 112.. Lifting head 113.. · Shaft section 114.. Secant device 115.. Knife 116.. Cutting Blade® 119... Cutting Wall Section - 119a... Upper Scraper Wall 120.. Movement Plane 121.. Partition Wall Section 122.. Movement Arrow 123.. Adjustment Area 124. Swing joint 125.. . Swing axis ® 126... fixing bolt 127.. corresponding knife bracket 129.. with hinge axis 130.. fastening bolt 131.. clip clamp 132.. retaining spring End 134.. Adjusting element 135.. Supporting wall 136, 137... Needle plate slider 138.. Fixing structure 139.. Locking projection 140... Leaf spring 141.. Locking groove 142. . splint 143.. movement direction 144.. to the fixed structure 145.. actuate the indenter 146.. guide device 147... guide groove 148.. spring 149.. pin 150.. 151.. .Matching holes 153.. fixing bolts 35

Claims (1)

201033430 VII. Patent application scope: 1. A double needle sewing machine, the double needle sewing machine has a needle receiving for receiving two needles - the double needle sewing machine has two pendulums fixedly spaced on the bottom The shuttle support's shuttle supports each have a shuttle that cooperates with one of the two needles when opening/and tracking, and is inclined And the double needle sewing machine has a hollow shaft at least partially surrounding the bottom, the hollow shaft being driven to rotate about an axis of rotation in synchronism with the rotation of the tip of the shuttle, '' Fixing a screw to fix at least one of the two shuttle bearings to the bottom shaft, the fastening portion of the fastening screw having an end side fastening surface passing through the through hole of the hollow shaft Abutting against a mating surface complementary to the fastening surface, the abutting surface being formed in a casing wall of the bottom shaft, wherein the abutting surface is designed not to be rotationally symmetrical about an axis of rotation of the bottom shaft, - the double needle sewing machine has a fixing means for holding the hollow shaft relative to the fastening screw even when the fastening surface of the fastening screw is detached from the abutting surface The circumferential relative position. 2. The sewing machine according to claim 1, wherein the fixing device comprises: an adjusting sleeve surrounding the hollow shaft, and the adjusting sleeve is formed to be complementary to the fastening screw Radial internal threads, and 36 201033430 a fastening structure that secures the adjustment sleeve in a relative position relative to the hollow shaft. 3. The sewing machine according to claim 2, wherein the fastening structure comprises at least one second fastening screw, and the second fastening screw passes through the adjustment sleeve The second internal thread, which is complementary to the second fastening screw, abuts against the outer wall of the hollow shaft with the end-side fastening surface. 4. The sewing machine according to claim 3, wherein a wall thickness reduction is formed in the hollow shaft adjacent to a region where the at least one second fastening screw clamps the hollow shaft unit. The sewing machine according to any one of claims 1 to 4, wherein the abutting surface is designed to be flat. The sewing machine according to any one of claims 1 to 4, wherein the abutting surface is designed as a "V" groove. The sewing machine according to any one of claims 1 to 6, wherein the abutting surface is formed in a casing wall of the bottom shaft along an axial adjustment region S. 37