CN2910980Y - Thread hooking device for chain stitch sewing machine - Google Patents

Abstract

A thread hooking device of a chain stitch sewing machine comprises a straight needle mechanism and a curved needle mechanism, wherein the straight needle mechanism is positioned above the curved needle mechanism, a first straight needle is arranged on the straight needle mechanism, a first curved needle opposite to the first straight needle is arranged on the curved needle mechanism, and a second straight needle and a third straight needle are also arranged on the straight needle mechanism; the looper mechanism on still be equipped with second looper, third looper, the straight needle of second set up with the second looper relatively, the straight needle of third set up with the third looper relatively, this crochet hook device has adopted the mode of three straight needles, three loopers, directly improves sewing strength through increasing the stitch seam like this, has solved the puzzlement that intensity is low when knitting the medium-thickness material to the stitch.

Description

The thread hooking apparatus of chain sitch sewing machine

Technical field

The utility model relates to a kind of thread hooking apparatus of chain sitch sewing machine.

Background technology

The sewing device of thick material during the use seam is knitted in the factory at present, mostly be the replacement of ordinary sewing machine or oneself repacking, complex structure, the efficient that wastes time and energy is low, be prone to defectives such as waste product, most importantly their adopt mostly is the single needle Sewing machines, and they just can't reach requirement than high product for requirement of strength.

Summary of the invention

The purpose of this utility model provides a kind of thread hooking apparatus of chain sitch sewing machine, and it can be made by the thick material of centering.

The utility model can be implemented by the following technical programs:

A kind of thread hooking apparatus of chain sitch sewing machine, comprise staight needle mechanism and bending needing mechanism, described staight needle mechanism be positioned at bending needing mechanism above, described staight needle mechanism comprises the staight needle bar of the knee-action done that links to each other with head, be arranged on the staight needle folder of described staight needle bar lower end, be arranged on first staight needle on the described staight needle folder, described bending needing mechanism comprises the looper frame, be located at the looper balance staff that to do left and right sides reciprocating rotating motion on the described looper frame, the cruciform joint that is connected with described looper balance staff, the crank that is connected with cruciform joint, be installed on the curved needle shaft on the described crank, be contained in first curved needle crank and first looper that is arranged on described first curved needle crank on the described looper balance staff, described first looper is relative with described first staight needle, the interstitial hole oblique of described crank and described cruciform joint also is provided with second staight needle on the described staight needle folder side by side, the 3rd staight needle; Also be provided with second curved needle crank and the 3rd curved needle crank on the described looper balance staff side by side; Described second crank is provided with second looper, and described the 3rd crank is provided with the 3rd looper, and described second staight needle and second looper are oppositely arranged, and described the 3rd staight needle and the 3rd looper are oppositely arranged.

Described first staight needle, second staight needle, the 3rd staight needle are set in parallel on the described staight needle folder.

Compared with the prior art the utility model has following advantage: the thread hooking apparatus of described chain sitch sewing machine is increased to the mode that has adopted three staight needles, three loopers on the basis of original single staight needle, single looper mode, can directly improve sewing intensity by increasing stitching like this.In addition, described thread hooking apparatus forms on the stitching than common flat seam machine and shortens for a long time, flat seam machine needs very long upper thread to walk around shuttle in forming the stitching process, causes same section of upper thread will therefore lose its intensity to a great extent repeatedly back and forth by the staight needle pin hole.In chain seam machine, it is shorter to form the required suture of stitching, and back and forth rub sassafras and the tortuous number of times of suture are also less, and therefore the intensity of loss is also less, and this also just can improve the intensity of sewing greatly, to satisfy the demand that high strength is sewed.In addition, in flat seam machine, the line that often need refoot, and chain seam machine does not have shuttle, bottom line is directly extracted out from bobbin, therefore can enhance productivity greatly.When solving, also satisfied like this efficient, high-quality needs to the high strength requirement.

Description of drawings

Accompanying drawing 1 is the stereogram of the thread hooking apparatus of chain sitch sewing machine of the present utility model;

Accompanying drawing 2 is the stereogram of bending needing mechanism of the present utility model;

Accompanying drawing 3 is the stereogram that protects pin mechanism and looper frame of the present utility model;

Wherein: 1, staight needle mechanism; 2, bending needing mechanism; 3, first looper; 4, first staight needle; 5, second staight needle; 6, the 3rd staight needle; 7, second looper; 8 the 3rd loopers; 9, first curved needle crank; 10, looper balance staff; 11, looper frame; 12, protect pin mechanism; 13, pin is protected in swing; 14, protect the pin crank; 15, protect needle shaft; 16, shank is fixedly protected on a left side; 17, the right shank that fixedly protects; 18, protect needle bar frame; 19, staight needle folder; 20, needle plate; 21 staight needle bars; 22, second curved needle crank; 23, the 3rd curved needle crank; 24, cruciform joint; 25, crank; 26, curved needle shaft.

The specific embodiment

The thread hooking apparatus of chain sitch sewing machine as shown in Figure 1, comprise staight needle mechanism 1 and bending needing mechanism 2, described staight needle mechanism 1 be positioned at bending needing mechanism 2 above, described staight needle mechanism 1 comprises the staight needle bar 21 of the knee-action done that links to each other with head, be arranged on the staight needle folder 19 of described staight needle bar 21 lower ends, be arranged on first staight needle 4 on the described staight needle folder 19, described bending needing mechanism 2 comprises looper frame 11, be located at the looper balance staff 10 that to do left and right sides reciprocating rotating motion on the described looper frame 11, the cruciform joint 24 that is connected with described looper balance staff 10, the crank 25 that is connected with cruciform joint 24, be installed on the curved needle shaft 26 on the described crank 25, be contained in first curved needle crank 9 and first looper 3 that is arranged on described first curved needle crank 9 on the described looper balance staff 10, described first looper 3 is relative with described first staight needle 4, the interstitial hole oblique of described crank 25 and described cruciform joint 24 also is provided with second staight needle 5 on the described staight needle folder 19, the 3rd staight needle 6; Also be provided with second curved needle crank 22 and the 3rd curved needle crank 23 on the described looper balance staff 10; Described second crank 22 is provided with second looper 7, and described the 3rd crank 23 is provided with the 3rd looper 8, and described second staight needle 5 and second looper 7 are oppositely arranged, and described the 3rd staight needle 6 and the 3rd looper 8 are oppositely arranged.

Described first staight needle, 4 second staight needles, 5, the three staight needles 6 are set in parallel on the described staight needle folder 19.

Bending needing mechanism 2 as shown in Figure 2, first looper 3 on the described bending needing mechanism 2, second looper 7, the 3rd looper 8 are respectively with parallel fastening being arranged on described first curved needle crank 9, second curved needle crank 21 and the 3rd curved needle crank 22 of screw.Described first curved needle crank 9, second curved needle crank 21 and the 3rd curved needle crank use all that screw is fastening to be contained on the looper balance staff 10.Looper balance staff 10 is contained on the looper frame 11, and can rotate flexibly.Be connected with cruciform joint 24 on one end of described looper balance staff 10, be connected with crank 25 on the cruciform joint 24, described crank 25 is fastened on the curved needle shaft 26, and crank 25 and cruciform joint 24 interstitial hole obliques, when rotating on the curved needle shaft 26, looper balance staff 10 promptly has axially-movable, and the reciprocating rotating motion is arranged again, make and the pinpoint movement ovalisation track of described first looper 3, second looper 7, the 3rd looper 8 correctly collude line to reach.

One side of described bending needing mechanism 2 also is provided with protects pin mechanism 12.The stereogram that protects pin mechanism 12 and looper frame 11 as shown in Figure 3, swing is protected pin 13 and is contained in and protects on the pin crank 14, protecting pin crank 14 is fixed on and protects on the needle shaft 15, under the reciprocating operation that protects needle shaft 15, drive swing and protect pin 13 motions, described first looper 3, second looper 7, the 3rd looper 8 are colluded allow when getting upper thread the needle point of described first staight needle 4, second staight needle 5, the 3rd staight needle 6 touch swing gently and protect pin 13, its height should be adjusted to and not touch a left side and fixedly protect the scope that shank 16, the right side fixedly protect shank 17.Shank 16 fixedly is protected on a left side, the right shank 17 that fixedly protects is contained in that to protect on the needle bar frame 18 the usefulness screw fastening, protecting needle bar frame 18 is fixed on again on the looper frame 11, adjusting makes a left side fixedly protect shank 16, the right gap of fixedly protecting shank 17 and eedle is 0.1-0.2mm, then fastening with screw.

Described first looper 3 when machine runs well, second looper 7, the 3rd looper 8 should collude the line motion, its motion process at first is when described first staight needle 4, second staight needle 5, the 3rd staight needle 6 passes needle plate 20, go up after moving to extreme lower position, begin to form wire loop, described first looper 3, second looper 7, the 3rd looper 8 is to described first staight needle 4, second staight needle 5, the motion of the 3rd staight needle 6 directions, penetrate described first staight needle 4, second staight needle 5, the wire loop of the 3rd staight needle 6, follow described first staight needle 4, second staight needle 5, the 3rd staight needle 6 continues to move upward, described first looper 3, second looper 7, the 3rd looper 8 moves forward, when described first looper 3, second looper 7, when the 3rd looper 8 begins toward swivel motion, described first staight needle 4, second staight needle 5, the 3rd staight needle 6 secondaries descend and puncture sewing and cross described first looper 3, second looper 7, the head of the 3rd looper 8 forms looper triangle wire loop, last described first looper 3, second looper 7, the 3rd looper 8 resets, described first staight needle 4, second staight needle 5, the 3rd staight needle 6 begins to form a wire loop again, described first looper 3, second looper 7, the 3rd looper 8 is again along described first staight needle 4, second staight needle 5, the 3rd staight needle 6 directions penetrate in the needlework ring once more, strain previous stitching simultaneously, so finish continuous three-way chain-type stitch repeatedly.

Claims (2)

1, a kind of thread hooking apparatus of chain sitch sewing machine, comprise staight needle mechanism (1) and bending needing mechanism (2), described staight needle mechanism (1) be positioned at bending needing mechanism (2) above, described staight needle mechanism (1) comprises the staight needle bar (21) of the knee-action done that links to each other with head, be arranged on the staight needle folder (19) of described staight needle bar (21) lower end, be arranged on first staight needle (4) on the described staight needle folder (19), described bending needing mechanism (2) comprises looper frame (11), be located at the looper balance staff (10) that to do left and right sides reciprocating rotating motion on the described looper frame (11), the cruciform joint (24) that is connected with described looper balance staff (10), the crank (25) that is connected with cruciform joint (24), be installed on the curved needle shaft (26) on the described crank (25), be contained in first curved needle crank (9) on the described looper balance staff (10) and be arranged on first looper (3) on described first curved needle crank (9), described first looper (3) is relative with described first staight needle (4), the interstitial hole oblique of described crank (25) and described cruciform joint (24) is characterized in that: also be provided with second staight needle (5) side by side on the described staight needle folder (19), the 3rd staight needle (6); Also be provided with second curved needle crank (22) and the 3rd curved needle crank (23) on the described looper balance staff (10) side by side; Described second crank (22) is provided with second looper (7), and described the 3rd crank (23) is provided with the 3rd looper (8), and described second staight needle (5) is oppositely arranged with second looper (7), and described the 3rd staight needle (6) is oppositely arranged with the 3rd looper (8).

2, the thread hooking apparatus of chain sitch sewing machine according to claim 1 is characterized in that: described first staight needle (4), second staight needle (5), the 3rd staight needle (6) are set in parallel on the described staight needle folder (19).

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