TWM465414U - Thread channel mechanism of needle-replaceable type sewing machine - Google Patents

Description

Lane mechanism of needle changeable sewing machine

The present invention relates to a wire mechanism for stabilizing a seam position at a front portion of a sewing machine, and more particularly to a wire guide mechanism for stabilizing a plurality of stitches in a wire track when a sewing machine with a plurality of needle bars is switched.

Press, the general sewing machine must be equipped with the upper arm and the lower lower arm and the needle plate below, and the spindle is synchronously driven by the spindle to drive the thread take-up mechanism and the crank device to drive the needle bar mechanism of the front part of the upper arm. There is a hooking device in the lower part of the feeding mechanism and the needle plate, and the sewing needle of the needle bar mechanism drives the sewing line to reciprocate and puncture the cloth, and the sewing thread is matched with the correct operation timing of the thread take-up mechanism and the hook line device to Perform sewing work.

Among them, the thread take-up mechanism is generally located above the needle bar mechanism to ensure the tension of the thread and reduce the resistance of the thread through the thread take-up mechanism, and currently there is little in addition to a multi-needle bar type embroidery machine on the market. Sewing machine that directly switches the needle bar, but in view of the fact that the general multi-needle bar type embroidery machine still has a large volume and the movement stroke of the feeding table of the driving device must be lengthened, it is necessary to innovate and design a sewing reference point and When the position of the bottom platform is unchanged, the sewing machine that can directly switch between different needle bars according to the sewing needs can be used.

However, once the ring needle bar is designed on the front part of the sewing machine to switch the plurality of needle bars, the thread take-up mechanism must also process a plurality of stitches at the same time, so that if the needle threading path is not controlled, when the needle bar is switched, It will not be able to stabilize the length of the plurality of stitches in the line, so that the tension of the plurality of stitches changes. This in turn affects the sewing operation.

The main purpose of the present invention is to provide a lane mechanism for stably stitching a plurality of sutures for a convertible needle bar type sewing machine, such that the length of the plurality of stitches passes through the thread hole of the thread take-up rod and the needle hole of the needle. It will not change because the sewing machine switches the needle bar.

The secondary purpose of this creation is to further have a clamping line between the thread hole of the thread take-up rod and the needle hole of the needle, so that when the sewing machine is sewing, the stitch in use can be released and the unused stitch is pinned. Avoid multiple stitches from escaping from the needle hole.

Another purpose of this creation is that the thread take-up lever can be used in conjunction with the threader, so that the position of the thread take-up lever is no longer limited to the top of the needle bar, which facilitates the design of the entire sewing machine.

In order to achieve the above object, the thread path mechanism of the needle-changeable sewing machine of the present invention mainly comprises a thread take-up lever, a ring-shaped needle bar and a plurality of stitches, wherein the thread take-up lever has a swinging end and a pick-up end, The oscillating end is configured to drive the above-mentioned take-up end to be displaced up and down, and the take-up end has a plurality of line holes; the annular needle bar has a rotating axis and a plurality of spaced-apart pinholes, and forms a hole inside The distance between the needle bar holes and the rotating shaft center is the same, and each needle bar hole respectively accommodates a needle bar having a needle, and each needle has one a pinhole; and the suture is sequentially passed through a line path formed by a line hole of the thread take-up lever, a through space of the annular needle bar, and a pinhole of the needle.

In a preferred embodiment, the present invention is provided with a positioning plate at the bottom of the annular needle bar, and the positioning disk has a plurality of threading holes around the rotation axis for the plurality of stitches to penetrate, and the above A clamping device is further arranged on the bottom of the positioning plate.

The wire clamping device is provided with a wire clamping member covering one end of the plurality of threading holes of the positioning plate, and the wire clamping member has a plurality of covering the plurality of wires a clamping surface of the threading hole, and a notch is formed on the clamping surface to correspond to one of the plurality of threading holes.

In a possible embodiment, the wire clamping device is further provided with a shaft member, a spring and a nut to cooperate with the wire clamping member to form a clamping stitching means. In addition to this, a drive shaft member can be designed to cooperate with the above-mentioned wire clamping member to form a release stitching means.

Furthermore, in another embodiment, the present invention can also directly provide a clamping mechanism between the thread take-up lever and the annular needle bar, wherein the clamping mechanism is provided with a crimping disc, and the crimping disc has a plurality of serially connected pressing pieces, wherein the plurality of pressing pieces are provided with a loose wire unit and a driving unit for pushing the loose wire unit, wherein the loose wire unit is provided with a shaft, and the support shaft is pivoted a plurality of loose boards corresponding to the positions of the pressing pieces, and the driving unit selectively pushes all of the plurality of loose boards into between two of the plurality of pressing pieces to release Selected stitches.

In a possible embodiment, the driving unit comprises a gear and a moving member, and the gear is assembled on the rotating shaft center, and one end of the moving member is engaged with the gear, and the other end is provided with a flange. In another possible embodiment, the driving unit includes a plurality of pneumatic cylinders respectively abutting a loosening plate, and a plurality of return springs sleeved on the supporting shaft, wherein the return spring ensures the unactuated pneumatic cylinder Bit.

However, the two possible embodiments of the foregoing drive unit are for convenience of illustration only, and are not intended to limit the configuration of the drive unit, that is, other different structures, but also selectively allow the layup to release the individual stitches. It belongs to the technical content of this simple change of creation.

In addition, the top of the annular needle bar can be further equipped with a positioning plate, and the positioning disk has one or a plurality of threading holes around the rotating axis for the plurality of stitches to penetrate.

In the foregoing two preferred embodiments, the thread between the thread hole of the thread take-up rod and the through space of the annular needle bar is inserted in the plurality of stitches. One or more threaders may be further provided on the road to maintain the above-mentioned suture tension and allow the suture path to be changed.

The feature of the creation is that the plurality of stitches are substantially equidistantly formed by the line path formed by the thread hole of the thread take-up rod, the through space and the pinhole, so that the stitch length is not switched by the sewing machine. After that, it has changed. In addition, the threaded hole of the thread take-up rod and the needle hole of the needle can further have a clamping design, so that when the sewing machine switches the needle bar and then performs sewing, the unused stitch is clamped to avoid the occurrence of the plurality of stitches. The situation in which the needle pin is detached.

In addition, the creation of the stitching position between the thread take-up lever and the ring-shaped needle bar clamp is matched with the threader, so that the position of the thread take-up lever is no longer limited to the top of the needle bar, which is convenient. The entire sewing machine configuration design.

10‧‧‧Sewing machine

11‧‧‧ head

12‧‧‧Needle bar switching mechanism

20‧‧‧Ring needle stick

201‧‧‧Cylinder wall

202‧‧‧Rotating axis

203‧‧‧through space

204‧‧‧ pin hole

205‧‧‧ needle stick

206‧‧‧ needle

207‧‧‧ pinhole

21‧‧‧Thread take-up

211‧‧‧Swing end

212‧‧‧ pick-up end

213‧‧‧Line hole

22‧‧‧ stitching

23‧‧‧ Positioning plate

231‧‧‧Threading hole

232‧‧‧Opening

24‧‧‧-Clamping device

241‧‧‧Clamping parts

241a‧‧‧ Clip surface

241b‧‧‧Connecting Department

241c‧‧‧ gap

242‧‧‧ shaft parts

243‧‧ ‧ spring

244‧‧‧ nuts

245‧‧‧Drive rods

25‧‧‧Cables

26‧‧‧Clamping mechanism

261‧‧‧Crimping plate

261a‧‧‧ Pressure film

262‧‧‧Song unit

262a‧‧‧ shaft

262b‧‧‧Song board

263‧‧‧ drive unit

263a‧‧‧ gear

263b‧‧‧Mobile parts

263c‧‧‧Flange

263d‧‧‧ pneumatic cylinder

263e‧‧‧Return spring

The first picture is a three-dimensional schematic diagram of the creation line mechanism in the front of the sewing machine; the second picture is a schematic view of the sewing machine which cuts the circular needle bar 第; the third picture shows the formation of the bottom positioning plate of the circular needle bar Schematic diagram of a single threading hole; Figure 4 is a schematic cross-sectional view of the bottom of the ring-shaped needle bar with a positioning plate and a wire clamping device; Figure 5 is a drawing of the stitching wire through the positioning plate, the wire clamping device and the needle bar. Enlarged view; Figure 6 is an exploded view of the creation positioning plate and the clamping device; Figure 7 is a bottom view of the creation stitch from the bottom of the positioning plate to the needle hole of the needle; Figure 8 is the creation of the thread The diagram of the position of the rod can be changed; the figure 9 is a schematic diagram of the position of the thread take-up rod forward and convex; the figure 10 is a schematic diagram of the position of the thread take-up rod retracting backward;匣The top design of the positioning plate Figure 11A-11B is an enlarged schematic view of one or more threading holes of the positioning plate of Fig. 11; Fig. 12 is a schematic view of the first clamping mechanism provided between the thread take-up rod and the ring-shaped needle bar 13A-13B is a schematic view of the action of the first clamping mechanism with the needle changing; FIG. 14 is a schematic view of the second clamping mechanism disposed between the thread take-up rod and the annular needle bar; and FIG. It is a structural schematic diagram of another viewing angle of the second clamping mechanism of Fig. 14.

In order to further understand the structure, use and characteristics of this creation, we have a deeper and clearer understanding and understanding. The preferred embodiment is described below with reference to the following:

Referring to Fig. 1, the thread path mechanism of the needle-changeable sewing machine of the present invention is mainly matched with the needle bar switching mechanism 12 mounted on the front portion 11 of the sewing machine 10, wherein the creation is mainly by a ring-shaped needle bar. 20 and a take-up lever 21 constitute a lane path through which a plurality of stitches 22 are interposed.

Referring to FIG. 2, the present annular needle bar 20 has an annular cylindrical wall 201 having a central axis of rotation 202 and a top-to-bottom penetrating space therein. 203, and the plurality of spaced-apart pinholes 204 are disposed adjacent to the edge of the annular needle bar 20, and the distance between each of the pinholes 204 and the rotating axis 202 is the same, and each of the bar holes 204 A needle bar 205 having a needle 206 is respectively accommodated therein, and each needle 206 has a pinhole 207. The ring needle bar 20 can be rotated by the needle bar switching mechanism 12, whereby one of the ring pins 20 is selected to be switched to the sewing position.

The creation thread take-up lever 21 is pivoted to the front of the sewing machine 10 The front end is located at a region directly above the cylindrical wall 201 of the annular needle bar 20, and has a swinging end 211 and another picking end 212. The swinging end 211 can pivotally move the pick-up end 212 to move up and down. And having a plurality of wire holes 213 through which the suture 22 is inserted.

Further, the plurality of sutures 22 are sequentially passed through a line path formed by the thread hole 213 of the thread take-up lever 21, the through space 203 of the annular needle bar 20, and the pinhole 207 of the needle 206. Thus, the length of the plurality of stitches 22 is not changed by the sewing machine 10 after the needle bar 205 is switched.

In a possible embodiment, the present invention can further provide a positioning disk 23 at the bottom of the annular needle bar 20, and the positioning disk 23 rotates synchronously with the annular needle bar 20 and is disposed at the center. A plurality of threading holes 231 surround the circumference of the rotation axis 202 for the plurality of stitches 22 to penetrate to stabilize the track path, and a plurality of openings 232 are formed at corresponding positions of the needle bar holes 204.

However, the foregoing locating disc structure is only convenient for illustrative purposes. Please refer to FIG. 3, that is, the locating disc 23 can be designed as a plurality of splicing holes 23 for the suture 22 to be worn. In.

Referring to FIG. 4, in addition, a clamping device 24 may be further disposed on the bottom of the positioning plate 23 for selectively releasing the suture 22 passing through the positioning plate 23 when the needle bar 205 is switched, or Clamp at the beginning of sewing.

Referring to FIG. 5, the wire clamping device 24 is provided with a wire clamping member 241 for clamping the suture 22, and the wire clamping member 241 can be coupled with a shaft member 242 to engage a spring 243 and a nut 244 by the spring 243. One end abuts against the nut 244 fixed to the shaft member 242, and the other end abuts against the wire clamping member 241, so that the wire clamping member 241 is in close contact with the end surface of the positioning plate 23 to form a clamping stitching means; The wire clamping member 241 is further configured to cooperate with a driving rod member 245 for driving the wire clamping member 241 against the elastic force of the spring 243 and driving the upper portion. The wire clamping member 241 is moved downward to separate the end faces of the positioning disk 23 to form a release stitching means, so that the sewing thread 22 can be released when the needle bar 205 is switched.

Referring to FIG. 6, the wire clamping member 241 has a clamping surface 241a covering the plurality of threading holes 231, and extends on the bottom side of the clamping surface 241a to form a connecting portion assembled with the driving rod member 245. 241b, in order to prevent the above-mentioned wire clamping member 241 from rotating, and the above-mentioned clamping surface 241a is provided with a notch 241c for corresponding one of the plurality of threading holes 231, so that the suture 22 in use can pass freely, and the rest does not correspond. The threading hole 231 will engage the threading surface 241a to clamp the stitching 22 to prevent the plurality of stitches 22 from being detached from the needle hole 207 when sewing is started after the needle bar 205 is switched.

Referring to FIG. 7, the plurality of sutures 22 are inserted through the thread hole 213 of the thread take-up lever 21, the through space 203 of the annular needle bar 20, and the pinhole 207 of the needle 206. After constructing the track path, the sections of the respective sutures 22 between the threading holes 231 and the pinholes 207 are arranged in a radial arrangement from top to bottom, so that the stitches 22 pass through the line mechanism. The wire hole 213, the threading hole 231 and the pinhole 207 are substantially in a nearly equidistant manner, so that the length of the plurality of stitches 22 in the track can be stabilized after the sewing machine 10 performs the switching of the needle bar 205.

Furthermore, the foregoing embodiment mentions that the thread take-up lever 21 is located directly above the cylindrical wall 201. However, this description is for convenience of illustration only, as shown in FIG. 8, that is, the above-mentioned thread take-up lever 21, the relative position to the front end 11 can also be changed, and the thread take-up lever 21 can be positioned outside the upper portion of the cylindrical wall 201. Referring to FIGS. 9 and 10 again, in addition to the aforementioned change in the lateral position, the present invention may of course also be used to assemble the thread take-up lever 21 in a convex position in front of the front end 11 or a retracted position in the rear.

Since the position of the thread take-up lever 21 is changed, the stitching 22 in the through-space 203 may not be brought into a nearly vertical state, so that the cylindrical wall 201 interferes with the path of the stitching 22, hindering the stable thread taking process, and therefore, it is necessary to Between the line hole 213 of the above-mentioned thread take-up lever 21 and the above-mentioned annular needle bar 20 One or more wire aligners 25 are provided on the passage for maintaining the tension of the suture 22 and changing the path of the suture 22 to ensure that the suture 22 does not contact the cylindrical wall 201 of the annular needle bar 20 .

Referring to FIG. 11, in another preferred embodiment, the present invention is further provided with a positioning disk 23 which is further mounted on the top of the annular needle bar 20, and the positioning disk 23 has a threading hole 231 adjacent to the rotating shaft. The core 20 (see Fig. 11A), or a plurality of threading holes 231 surround the circumference of the rotation axis 202 (see Fig. 11B) for the plurality of sutures 22 to penetrate to restrict the suture 22 from passing through the path.

Referring to FIG. 12, a wire clamping mechanism 26 may be disposed between the thread take-up lever 21 and the annular needle bar 20, and the wire clamping mechanism 26 is provided with a set of crimping discs 261, and the crimping disc 261 has A plurality of serially connected pressing pieces 261a are provided with a suture 22 between the pressing pieces 261a, and a plurality of pressing units 262a are provided on the side of the plurality of pressing pieces 261a, and a driving unit for driving the loosening unit 262 is provided. The unit 263, the loosening unit 262 is provided with a shaft 262a, and the supporting shaft 262a is pivotally provided with a plurality of loose wires 262b arranged corresponding to the pressing piece 261a, and the driving unit 263 is selectively pushed One of the plurality of loose wire plates 262b is inserted between two of the plurality of pressing pieces 261a. In a possible embodiment, the driving unit 263 includes a gear 263a and a moving member having a rack. 263b, the gear 263a is assembled to the rotating shaft center 202, and one end of the moving member 263b is engaged with the gear 263a, and the other end is provided with a flange 263c.

Referring to FIGS. 13A and 13B, when the sewing machine 10 is to switch the needle bar 205, the gear 263a will be driven by the rotating shaft center 202, thereby changing the position of the moving member 263b, so that the flange 263c is pushed against different pines. The wire plate 262b is cut into the other two pressing pieces 261a, thereby ensuring that the suture 22 of the sewing needle bar 205 is not clamped and positioned between the pressing pieces 261a, and the stitching line 22 corresponding to the needle bar 205 for the sewing operation is performed. The wire can be freely fed by cutting the above-mentioned loose wire plate 262b.

Referring to FIG. 14 and FIG. 15 , in another possible embodiment of the drawing, the driving unit 263 includes a plurality of pneumatic cylinders 263 d respectively abutting a loose wire plate 262 b , and the plurality of pneumatic cylinders 263 d are formed by a group. Pneumatic line control (not shown), in synchronization with the needle bar switching mechanism 12, to release the suture 22 in use; and corresponding to the loose plate 262b having a plurality of return springs 263e sleeved on the support shaft 262a Ensure that the above-mentioned unactuated pneumatic cylinder 263d is home.

However, the two possible embodiments of the foregoing driving unit 263 are for convenience of illustration only, and do not limit the configuration of the driving unit 263, that is, other different structures, but also selectively release the stitches 22 individually. The technical content of this creation is simply changed.

The above embodiments are used for convenience only to illustrate that the present invention is not limited. In the spirit of the creative spirit, all kinds of simple deformations and modifications made by those skilled in the industry in accordance with the scope of the patent application and the creative description of the creation should still be It is included in the scope of the following patent application.

10‧‧‧Sewing machine

11‧‧‧ head

12‧‧‧Needle bar switching mechanism

20‧‧‧Ring needle stick

201‧‧‧Cylinder wall

202‧‧‧Rotating axis

203‧‧‧through space

204‧‧‧ pin hole

205‧‧‧ needle stick

206‧‧‧ needle

207‧‧‧ pinhole

21‧‧‧Thread take-up

211‧‧‧Swing end

212‧‧‧ pick-up end

213‧‧‧Line hole

22‧‧‧ stitching

23‧‧‧ Positioning plate

231‧‧‧Threading hole

Claims (10)

A thread path mechanism of a needle changeable sewing machine, comprising: a thread take-up lever having a swing end and a thread take-up end, wherein the swing end is used to drive the thread take-up end to be displaced up and down, and the pick-up end has a plurality of lines a ring-shaped pin bar having a rotating axis and a plurality of spaced-apart pinholes, and forming a top-down through space therein, between the pinholes and the rotating axis The distances are the same, and each needle bar hole respectively accommodates a needle bar having a needle, and each needle has a pinhole; and a plurality of sutures are sequentially passed through the line of the above-mentioned thread take-up rod A hole, a through-space of the annular needle bar, and a needle path formed by the pinhole of the needle. A thread path mechanism of a needle-changeable sewing machine according to the first aspect of the invention, wherein the bottom of the annular needle bar is provided with a positioning plate, and the positioning disk has at least one threading hole for the plurality of stitches to penetrate. According to the wireway mechanism of the interchangeable needle sewing machine of claim 2, wherein the bottom of the positioning plate is further provided with a wire clamping device. The thread path mechanism of the interchangeable needle sewing machine according to claim 3, wherein the wire clamping device is provided with a wire clamping member covering one end of the plurality of threading holes of the positioning plate, and the wire clamping member has a cover covering the plurality a clamping surface of the threading hole, and a notch is formed on the clamping surface to correspond to one of the plurality of threading holes. According to the wire-track mechanism of the interchangeable needle sewing machine of claim 4, wherein the wire clamping device is further provided with a shaft member, a spring and a nut cooperate with the wire clamping member to form a clamping stitching means. The wire path mechanism of the interchangeable needle sewing machine according to claim 5, wherein the wire clamping device is further provided with a driving shaft member The clip member forms a release stitching means. The trajectory mechanism of the interchangeable needle sewing machine according to the first aspect of the invention, wherein the top of the annular needle bar is further provided with a positioning disk synchronously, wherein the positioning disk has at least one threading hole surrounding the rotation axis For the above plurality of sutures to penetrate. According to the wireway mechanism of the interchangeable needle sewing machine of claim 1, wherein the thread take-up lever and the annular needle bar are further provided with a wire clamping mechanism. According to the wireway mechanism of the interchangeable needle sewing machine of claim 8, wherein the wire clamping mechanism is provided with a crimping disk, the crimping disk has a plurality of serially connected pressing pieces, and the plurality of pressing pieces are a loose wire unit and a driving unit for traversing the loose wire unit are disposed on the side, the loose wire unit is provided with a shaft, and the plurality of shafts are arranged on the upper side of the support shaft, and the plurality of loosened plates are arranged in a misaligned manner with the pressing piece. The driving unit selectively pushes all of the plurality of loose boards into between two of the plurality of pressing pieces. The lane mechanism of the interchangeable needle sewing machine according to the first aspect of the invention, wherein the plurality of stitches are provided on a passage between the thread hole of the thread take-up lever and the through space of the annular needle bar At least one threader is used to maintain the above stitch tension and to change the stitch path.