CN1048243A

CN1048243A - Additional miniature edge cover stitching device of home-use sewing machine

Info

Publication number: CN1048243A
Application number: CN 89104365
Authority: CN
Inventors: 孙跃庭
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-06-23
Filing date: 1989-06-23
Publication date: 1991-01-02

Abstract

Additional miniature edge cover stitching device of home-use sewing machine of the present invention, be the device that increases the over casting function about domestic sewing machine.The present invention is made up of support, rocker, fork, balancing point, commutation, pin folder screw and stage clip etc.The present invention can stitch out 301 lock-type chain stitchs and bound edge chain-type stitch 500 classes, and the locking-type bound edge that forms in once-through operation process combination stitching (301,500) can carry out flush joint, the work of overseam peace overseam.The present invention is simple in structure, and volume is little, installs easily, and is easy to use, cheap, and former domestic sewing machine need not any structure change.

Description

Additional miniature edge cover stitching device of home-use sewing machine

The invention relates to the device that domestic sewing machine increases the over casting function.Retrieval CN85102938A " can stitch out family expenses flush joint, the bound edge two-purpose sewing machine of 301 lock-type chain stitchs and 503 chain-type stitchs " and patent CN85200220 " a kind of three yarn closed seam device of joining use in sewing machine ".Find out that from patent documentation its common ground is: one, constitute, can stitch out two-wire lock-type chain stitch and bound edge chain-type stitch respectively, finish flush joint, over casting work by independently flush joint mechanism and over casting mechanism; Two, all be on the domestic sewing machine of structural integrity, add or the additional sewing mechanism of bound edge chain-type stitch independently.As simplifying two-purpose sewing machine and additional overseam device, in fact be exactly how to simplify over casting mechanism.Its simplification approach has two, and one, make over casting mechanism try one's best existing parts of shared domestic sewing machine and forms of motion thereof.Two, simplify the bound edge chain-type stitch.Promptly the simplest over casting of use mechanism just can knit out the bound edge chain-type stitch.Two patents have all adopted article one to simplify approach, as over casting mechanism shared the domestic sewing machine frame, the shank in parts such as platen and head and the flush joint mechanism, eedle and penetrate sewing and be exposed at the needlework ring that needle plate is dished out below, with and the eedle forms of motion.The patent two-purpose sewing machine has adopted second to simplify approach simultaneously, and the bound edge chain-type stitch 504 or 505 with commonly used is simplified to 503 stitchings, further simplifies its structure again.

Two patents also have difference: as the flush joint and the over casting mechanism of two-purpose sewing machine, be before this machine is produced, through optimal design, its size, can make overall plans in shape and locus, regulate mutually, arrange and make up more and simplify rationally, and manufacture by the experienced operator.The overseam device is the additional design on the family expenses Sewing machines, overseam plant bulk like this, and shape and locus all can be subjected to some limitation and restrictions.But in order to satisfy the minimum requirement of bound edge chain-type stitch, have to change, change a social system and increase some key components and partss of domestic sewing machine (needle plate, the feed dog mentioned as patent), this work will be born by the user, and difficulty is bigger, influences it and applies.

The object of the present invention is to provide 301 lock-type chain stitchs and bound edge chain-type stitch (500 class), the miniature over casting device that the locking-type bound edge that forms combination stitching (301500) constitutes in the once-through operation process.Its volume is little, and is simple in structure, and domestic sewing machine is not had any change requirement.

Locking-type bound edge combination stitching (301500) is to form like this, penetrate the sewing front and back by needlework ring 1, penetrate one group of (B or two B respectively, C) alternating packets blind stitching material edge, and the balancing point wire loop (B or the B that form at the sewing upper and lower surface, C), again with needle plate below shuttle thread ring a interweave, when choosing tight needlework, the shuttle thread ring that the needlework ring will interweave holds the pin hole from needle plate to be brought in the sewing, the balancing point wire loop at alternating packets blind stitching material edge with the interconnection of needlework ring, interconnects with the shuttle thread ring below sewing on sewing like this, form locking-type bound edge combination stitching (figure one, and figure two).

Figure one is the locking-type bound edge assemble line trace form formula figure that a balancing point wire loop B forms.

Figure two is locking-type bound edge assemble line trace form formula figures that two balancing point wire loop B, C form.

From locking-type bound edge combination stitching forming process, can draw to draw a conclusion

One, needlework ring and the shuttle thread ring formed stitching that interweaves is a part of locking-type bound edge combination stitching, knits out two-wire lock-type chain stitch 301, is finished by the sewing machine for covering chain stitch structure.

Two, alternating packets blind stitching material edge at the balancing point wire loop that the sewing upper and lower surface forms, is the one other component of locking-type bound edge combination stitching.But this componental movement form and mechanism thereof are all on needle plate.

Three, choose tight needlework ring, hold the pin hole from needle plate and take the shuttle thread ring that interweaves out of, and interconnect with the balancing point wire loop below sewing, this forms of motion and mechanism thereof are finished by the sewing machine for covering chain stitch structure.

More than analyze and can see, the miniature over casting device of locking-type bound edge combination stitching, reality is reduced to: can produce with the needlework ring has certain movement related, satisfies the mechanism of balancing point wire loop forms of motion.Be that the balancing point wire loop can be made the transmission mechanism of motion up and down.

Figure three additional miniature edge cover stitching device of home-use sewing machine are embodiments of the invention accompanying drawings.

With reference to figure three, additional miniature edge cover stitching device of home-use sewing machine, its structure comprises support (2), rocker (3), fork (4), balancing point (5), commutation (6), pin folder screw (7), stage clip parts and domestic sewing machine eedles such as (8), shuttle etc. constitute over casting mechanism, knit out locking-type bound edge combination stitching (301500).

Support (2) is fixed on the needle plate, and rocker (3) links to each other with support by rotating shaft (12), and stage clip (8) is fixed on the support, makes rocker direction swing to left down.Pin folder screw (7) is driven by shank and back and forth moves up and down, and contacts the roll sleeve (11) on the rocker in upper area, make rocker around the shaft (12) to the upper right side to swing.Balancing point (5) is fixed on the fork (4).Fork is (13) rocker swing relatively around the shaft, and pendulum angle is subjected to pivot pin on the fork (14) to stretch into the restriction of rocker empty cavity position, and stage clip is pressed to cavity both sides (being that balancing point has swung up and down two extreme positions) with fork.Commutation (6) is fixed on the support, and the flechette-type plane cam (9) of a dual intensity around the swing of self axis arranged in it, and the swing extreme position is pinned by stage clip.As rocker around the shaft (12) to the upper right side to when swing, the another side on the fork pivot pin (14) will contact the flechette-type plane cam (9) in the commutation (6), and fork and cam are all swung to its another extreme position.

Pin folder screw (7), stage clip (8) and rocker (3) are formed the transmission mechanism that balancing point swings, and the transmission mechanism that balancing point swings up and down is formed in rocker (3), fork (4) and commutation (6).By the resultant motion of these two kinds of transmission mechanisms, make one group of balancing point wire loop alternating packets blind stitching material edge, respectively in sewing upper and lower surface and needlework ring and the interconnection of shuttle thread ring, constitute the part of locking-type bound edge combination stitching.

For the balancing point wire loop occupies a less space and keeps the exact position, balancing point is by needle handle, the hollow needle body, and pin hole peace syringe needle etc. is partly formed.

With reference to embodiments of the invention (figure three), the present invention is introduced in the cycle of working in detail.Original mechanism of domestic sewing machine and forms of motion thereof are no longer repeated.

Eedle is in the limes superiors position, on take turns 0 ° of corner, rocker (3) is in the upper right side extreme position, stage clip (8) is pressed to pin folder screw (7) with roll sleeve (11), moves downward then balancing point silk ring (or rocker) direction swing to left down as needlework ring (or eedle).When on take turns and forward 73 ° to, the balancing point wire loop reaches sewing upper and lower surface left side extreme position respectively, pin folder screw and roll sleeve begin separately.Forward 80 ° to, the needlework ring penetrates the balancing point wire loop.Forward 99 ° to, the needlework ring penetrates bottom needlework ring.Forward 261 ° to, eedle withdraws from bottom needlework ring.Forward 280 ° to, eedle withdraws from the balancing point wire loop and forwards 287 ° to, and pin folder screw begins to contact with roll sleeve, drives the rocker swing and forwards 295 ° to, and balancing point withdraws from the sewing edge, pivot pin on the fork (14) contact commutation (6), and fork begins swing.Forward 310 ° to, fork is swung continuously, and cam (9) begins swing.Forward 339 ° to, the swing of fork and cam finishes (be that balancing point swings up and down and finishes, cam is put the another location), forwards 360 ° to, and rocker reaches the upper right side to extreme position, and balancing point is finished an alternate cycles.

The advantages such as the present invention has simple in structure, and volume is little, installs easily, and is easy to use, cheap. Also has following characteristics: one, do not need domestic sewing machine is carried out any structural change. Two, needlework ring and balancing point wire loop are all on needle plate, and convenient operation uses, though the shuttle thread ring under needle plate, the former structure of available domestic sewing machine, it is interweaved with taking on the needle plate interconnects with bottom needlework ring. Three, additional domestic sewing machine of the present invention can be finished flush joint, three kinds of sewing works of bound edge and flush joint bound edge (i.e. two garment pieces simultaneously bound edge). Four, the rocker among the present invention pins with stage clip surmounting upper right extreme position, need not pull down the present invention and just can carry out the flush joint sewing and unclamp stage clip and can carry out bound edge or flush joint over casting again.

Claims

1, additional miniature edge cover stitching device of home-use sewing machine, it is characterized in that stitching out stitching is 301 lock-type chain stitchs and bound edge chain-type stitch (500 class), the locking-type bound edge that forms in once-through operation process combination stitching (301.500).

2,, it is characterized in that forming over casting mechanism braiding locking-type bound edge combination stitching (301500) by support (2), rocker (3), fork (4), balancing point (5), commutation (6), pin folder screw (7), stage clip (8) parts and domestic sewing machine eedle, shuttle etc. according to the described miniature over casting device of claim 1.

3,, it is characterized in that balancing point point (band balancing point wire loop) has the transmission mechanism that moves up and down according to claim 1,2 described miniature over casting devices.

4, according to claim 1,2 described miniature over casting devices, it is characterized in that the balancing point point has the transmission mechanism of horizontal movement.

5,, it is characterized in that the transmission mechanism that rocker (3), fork (4) and commutation (6) composition balancing point swing up and down according to the described miniature over casting device of claim 3.

6,, it is characterized in that the transmission mechanism that pin folder screw (7), stage clip (8) and rocker (3) composition balancing point swing according to the described miniature over casting device of claim 4.

7,, it is characterized in that balancing point partly is made up of needle handle, the hollow needle body, pin hole peace syringe needle etc. according to the described miniature over casting device of claim 2.

8,, it is characterized in that commutation has the flechette-type plane cam (9) of a dual intensity around self axis swing in (6) parts according to the described miniature over casting device of claim 2.