CN100359078C

CN100359078C - Automatic thread-cutting device for cylindrical sewing machine

Info

Publication number: CN100359078C
Application number: CNB2003101030896A
Authority: CN
Inventors: 卓瑞荣
Original assignee: XINGRUI SEWING MACHINE CO Ltd
Current assignee: XINGRUI SEWING MACHINE CO Ltd
Priority date: 2003-10-30
Filing date: 2003-10-30
Publication date: 2008-01-02
Anticipated expiration: 2023-10-30
Also published as: CN1611656A

Abstract

The present invention discloses an automatic thread cutting device for a cylindrical sewing machine, which is applied to a sewing machine and has the function of cutting needle thread and holding bottom yarn when a fabric is sewed. The device comprises a thread cutter, a linking mechanism and a driver, wherein the thread cutter comprises a thread cutting blade, an upper fixed blade and a lower fixed blade, and the thread cutting blade is provided with a first thread cutting part and a second thread cutting part. When the driver provides power for driving the thread cutting blade via the linking mechanism, and the thread cutting blade rotates to a position between the upper fixed blade and the lower fixed blade, the needle thread is cut firstly by the first thread cutting part, and the bottom yarn is cut and held by the second thread cutting part; thus, the trouble of threading the thread again does not occur when the sewing machine is used again.

Description

The automatic tangent apparatus of straight barrel type Sewing machines

Technical field

The present invention relates to a kind of automatic tangent apparatus of straight barrel type Sewing machines, particularly a kind ofly cut off the wire-clamping device that yarn is held follow-up stand-by yarn simultaneously when finishing making by thread cutting device.

Background technology

Sewing machine technique has developed quite skillfully, and this technology can be made ready-made clothes fast, for textile industry has been brought remarkable economic efficiency.The thread cutting device of existing Sewing machines, see also Fig. 1, shown in 2, the thread cutting device that should have Sewing machines comprises: first, second movable

cutting edge

61,62 and first,

second counteredge

63,64, this first movable cutting edge 61 is used for bearded needle line (not shown), utilize this first counteredge 63 to cut off again, and second movable cutting edge 62 is used for colluding filling, utilize second counteredge 64 to cut off, again the filling (not shown) is held, so existing Sewing machines need adopt two blades to cut off needlework and filling respectively, aforementioned again first, second

movable cutting edge

61,62 and first,

second counteredge

63,64 all are connected the bottom of needle plate 65, if to adjust this first, second

movable cutting edge

61,62 and first,

second counteredge

63,64 angle, then need needle plate 65 is unloaded, on needle plate 65, carry out adjustment again, at last again with on its lock carriage return seam platform (not shown), if needle plate 65 rocks in the process of lock carriage return seam platform, then may make the angle of previous adjustment that error takes place again, therefore very inconvenient.

Summary of the invention

Main purpose of the present invention is to provide a kind of interlock mode, and with the thread cutting mechanism of interlock Sewing machines, thread cutting device of the present invention comprises:

One thread cutter, this thread cutter comprises a trimming blade and a fixed blade, trimming blade and fixed blade are fixed in the sewing platform top of Sewing machines, this fixed blade comprises that fixed blade reaches fixed blade down, on being somebody's turn to do, following fixed blade is superimposed fixing, but leave a space therebetween, when the trimming blade rotation is passed through last, during following fixed blade, cut off yarn, in addition, the trimming blade has the first tangent line portion and the second tangent line portion, the first tangent line portion is used to cut off needlework, and the residue section that the second tangent line portion cuts off filling and clamp filling, this first tangent line portion and the second tangent line portion have a recess respectively, and the recess of the second tangent line portion wants dark than the recess of the first tangent line portion;

One interlinked mechanism comprises the turning part, first crank, and second crank, and first, second trace interconnect in regular turn with upper-part, and last, second trace is connected to the trimming blade again;

One driver provides the bidirectional-movement of this interlinked mechanism, cuts off yarn with the interlock thread cutter, and actuator frame is located on the support portion, and the turning part of this support portion and interlinked mechanism joins.

Another object of the present invention is to provide a kind of thread cutting device of being convenient to adjustment, the present invention is directly connected in aforesaid thread cutter on the sewing platform, needle plate is covered, during as if trimming blade that needs the adjustment thread cutter and fixed blade again, then directly adjustment on the sewing platform is difficult for producing error.

Description of drawings

Fig. 1 is the thread cutting device exploded view of existing Sewing machines.

Fig. 2 is the thread cutting device vertical view of existing Sewing machines.

Fig. 3 is a profile schematic perspective view of the present invention.

Fig. 4 is a three-dimensional exploded view of the present invention.

Fig. 5 is the enlarged drawing of thread cutter of the present invention.

Fig. 6-the 1st, thread cutting action vertical view of the present invention.

Fig. 6-the 2nd, the partial enlarged drawing of Fig. 6-1.

Fig. 6-the 3rd, thread cutting action vertical view of the present invention.

Fig. 6-the 4th, the partial enlarged drawing of Fig. 6-3.

The specific embodiment

Relevant detailed description of the present invention and technology contents, existing accompanying drawings is as follows:

See also Fig. 3, automatic tangent apparatus 1 comprises thread cutter 10, interlinked mechanism 20 and driver 30, wherein, this driver 30 places on the support portion 31, be used to provide power, and then drive interlinked mechanism 20 motions, this interlinked mechanism 20 interlock thread cutter 10 again carries out the trimming action.

See also Fig. 4, driver 30 can be the continuous bidirectional-movement that a two-way electromagnet provides interlinked mechanism 20, and then interlock thread cutter 10 cuts off needlework 50, and driver 30 is set up on the support portion 31, join with the turning part 21 of operating member 34 with interlinked mechanism 20, this support portion 31 is connected with catch 32 again, and this catch 32 is used for connecting flexible member 33 so that shockproof function to be provided, flexible member 33 is a spring or a shell fragment, and present embodiment adopts spring.

Interlinked mechanism 20 comprises turning part 21, first crank 22, second crank 23, and first,

second trace

24,16, one end vertical connection of one end of this turning part 21 and first crank 22, and

first crank

22 and 23 vertical connections of second crank, and second crank 23 and first trace 24 join, at last, first trace 24 connects second trace 16 again, and second trace 16 joins with trimming blade 11, in addition, second crank 23 is provided with displacement aperture 25, lock on the platform 42 by retaining element 26, this retaining element 26 is a screw or a rivet, and present embodiment is a screw, and utilizes this displacement aperture 25 to make 23 slippages of second crank, and second trace 16 slightly is the shape of a hoof, and driving trimming blade 11 makes it change on this with rotating manner, following fixed blade 121, carry out trimming between 122, in addition, the top of the sewing platform 41 of Sewing machines has a platform 42, the front end of this platform 42 has a slippage slot 421, and this slippage slot 421 provides the displacement of first trace 24.

Thread cutter 10 comprises trimming blade 11 and fixed blade 12, this trimming blade 11 utilizes retaining element 13 to be fixed in sewing platform 41 tops of Sewing machines, this fixed blade 12 then utilizes retaining element 14 to be fixed in the top front end of the sewing platform 41 of Sewing machines, wherein, fixed blade 12 comprises that fixed blade 121 reaches fixed blade 122 down, on being somebody's turn to do, following fixed blade 121,122 are superimposed, and has pad 123 therebetween, provide on this, following fixed blade 121, the space of leaving between 122 15 (seeing also Fig. 5), so that trimming blade 11 passes through, this trimming blade 11 is with last, following fixed blade 121,122 cut off needlework 50, in addition, trimming blade 11 has the first tangent line portion 111 and the second tangent line portion 112 (sees also Fig. 4,5), this first tangent line portion 111 is used to cut off needlework 50, and filling 51 is cut off by the second tangent line portion 112, and the residue section of filling 51 is clamped, and the first tangent line portion 111 and the second tangent line portion 112 have recess 113 respectively, 114, and the recess 114 of the second tangent line portion 112 wants dark than the recess 113 of the first tangent line portion 111.

See also Fig. 5,6-1,6-2,6-3,6-4, driver 30 provides a continuous bidirectional-movement, when driver 30 provides power that operating member 34 is moved backward, be interlock turning part 21 backward, and when turning part 21 backward the time, first crank 22 that is connected with turning part 21 i.e. motion backward, at this moment, because first crank 22 and second crank 23 are affixed mutually, so interlock second crank 23 moves backward, an end also is pulled rearward moving and second crank 23 and first trace 24 join, this first trace 24 displacement in slippage slot 421, rotate and drive second trace, 16 clockwise directions, trimming blade 11 also clockwise direction changes over to, following fixed blade 121, between 122, at this moment, needlework 50 are by the recess 113 of the first tangent line portion 111 and last, following fixed blade 121,122 cut off, and filling 51 is because the darker relation of the recess 114 of the second tangent line portion 112, so cut off by the second tangent line portion 112, the residue section of holding this filling 51 more simultaneously, and when driver 30 provides power that operating member 34 is moved forward, the interlock mode is with above-mentioned opposite, and last trimming blade 11 counterclockwise slightly outwards moves.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.

Claims

1. the automatic tangent apparatus of a straight barrel type Sewing machines is used for after making end-of-job, cuts off Sewing machines needlework (50) and filling (51), and the residue section of the described filling of clamping (51) again is characterized in that described automatic tangent apparatus comprises:

One thread cutter (10), described thread cutter (10) comprises a trimming blade (11) and a fixed blade (12), described trimming blade (11) and described fixed blade (12) are located at the top of the sewing platform (41) of described Sewing machines, described fixed blade (12) comprises that fixed blade on (121) reaches fixed blade (122), on described, following fixed blade (121,122) superimposed fixing, but leave a space therebetween, so that described trimming blade (11) passes through, described trimming blade (11) with described on, following fixed blade (121,122) cut off described needlework and described filling (50,51), in addition, described trimming blade (11) has one first tangent line portion (111) and one second tangent line portion (112), described needlework (50) are only cut off by the described first tangent line portion (111), and the described second tangent line portion (112) matches with described fixed blade (12), and the residue section of described filling (51) is clamped;

One interlinked mechanism (20), comprise a turning part (21), one first crank (22), one second crank (23), one first trace (24), and one second trace (16), one end of one end of described turning part (21) and described first crank (22) joins, and described first crank (22) interconnects with described second crank (23), and described second crank (23) joins with described first trace (24), and described first trace (24) is connected to described second trace (16), and described second trace (16) is connected to described trimming blade (11) again;

One driver (30), described driver (30) provides the reciprocating motion of described interlinked mechanism (20), cut off described needlework (50) with the described thread cutter of interlock (10), and described driver (30) is set up on the support portion (31), and operating member (34) joins with the described turning part (21) of described interlinked mechanism (20).

2. the automatic tangent apparatus of straight barrel type Sewing machines according to claim 1 is characterized in that, described support portion (31) are connected with a catch (32) again, and described catch (32) is used for connecting a flexible member (33), and described flexible member (33) is in order to shockproof.

3. the automatic tangent apparatus of straight barrel type Sewing machines according to claim 1 is characterized in that, described second crank (23) utilizes a retaining element (26) to interconnect with described first trace (24).

4. the automatic tangent apparatus of straight barrel type Sewing machines according to claim 3 is characterized in that, described retaining element (26) is a screw.

5. the automatic tangent apparatus of straight barrel type Sewing machines according to claim 1, it is characterized in that, described trimming blade (11) is one hook-shaped, described trimming blade (11) is connected in second trace (16) of described interlinked mechanism (20), and changes described trimming blade (11) between the described upper and lower fixed blade (121,122) trimming with rotating manner.

6. the automatic tangent apparatus of straight barrel type Sewing machines according to claim 1, it is characterized in that, described upper and lower fixed blade also has a pad (123) between (121,122), so that the described space of leaving between the described upper and lower fixed blade (121,122) (15) to be provided.

7. the automatic tangent apparatus of straight barrel type Sewing machines according to claim 1 is characterized in that, described driver (30) is a two-way electromagnet.

8. the automatic tangent apparatus of straight barrel type Sewing machines according to claim 1, it is characterized in that, described first tangent line portion (111) and the described second tangent line portion (112) have a recess (113,114) respectively, and the described recess (113) of the more described first tangent line portion (111) of the described recess (114) of the described second tangent line portion (112) wants dark.

9. the automatic tangent apparatus of straight barrel type Sewing machines according to claim 1 is characterized in that, described trimming blade (11) and described fixed blade (12) respectively utilize a retaining element (13,14) to be fixed in the top of the sewing platform (41) of described Sewing machines.