CN2334776Y

CN2334776Y - Thread cutting device for sewing machine

Info

Publication number: CN2334776Y
Application number: CN 98207024
Authority: CN
Inventors: 余明同
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-16
Filing date: 1998-07-16
Publication date: 1999-08-25
Anticipated expiration: 2008-07-16

Abstract

The utility model discloses a thread cutting device of a sewing machine, with positive thread cutting operation and easy regulation of the position of a thread cutting knife. The thread cutting device of a sewing machine comprises a base plate fixedly arranged on a sewing machine, a swing rod pivoted on the base plate, and a thread cutting knife tackle which can be linked by the swing rod. The thread cutting knife tackle is provided with a knife feeding element which can move on the base plate, and a cutting knife blade which is overlapped with the knife feeding element and linked with the swing rod. The back end part of the knife feeding element of the thread cutting knife tackle is formed with a pin joint groove and provided with a guide element which is convexly arranged inside a back guide groove of the cutting knife element for guiding.

Description

The sanction line apparatus of Sewing machines

The utility model relates to a kind of sanction line apparatus, particularly relates to a kind of sanction line apparatus of Sewing machines.

Fig. 1 is the schematic top plan view of the sanction line apparatus of Sewing machines in the past, this Sewing machines 9 is provided with driver 91, this driver 91 can drive cuts out line apparatus 1, this sanction line apparatus 1 comprises a substrate 11 that can be fixedly installed on the Sewing machines 9, one is hubbed on the fork 12 that can be driven device 91 interlocks on the substrate 11, one is arranged on the sanction line cutter group 2 on the substrate 11, and be hubbed on the substrate 11 and the swing arm 24 of cutting out line cutter group 2 interlocks, this substrate 11 is provided with a stop part 13, cut out line cutter group 2 comprise one can on substrate 11, move send cutter spare 21, one with send the cutting knife spare 22 of cutter spare 21 overlapping settings, one is fixedly installed on the sanction line cutter 23 of cutting knife spare 22 front ends, and one end be hubbed on front swing arm 24 and rear-swing arm 25 on the substrate 11 respectively, this send cutter spare 21 1 sides that one projection 211 is arranged, can with this stop part 13 touch to, cutting knife spare 22 is provided with a front guide slot 221 and a back guide groove 222, form a radian on this back guide groove 222, and before this, back guide groove 221,222 form a clamping groove 223, and this clamping groove 223 can be stretched for an end of fork 12 and put; Front swing arm 24 other ends are hubbed on and send on the cutter spare 21, and move in front guide slot 221, and this rear-swing arm 25, its other end also is hubbed on and send on the cutter spare 21, and is limited in the guide groove 222 of back mobile.

When 12 swings of driver 91 interlock forks, these fork 12 interlocks send cutter spare 21 and 22 motions of cutting knife spare simultaneously, when sending cutter spare 21 to move, in the past, rear-swing arm 24,25 articulates substrates 11 and produces swing for the center, therefore, this send the motion path of cutter spare 21 and cutting knife spare 22 is arc path, and when projection 211 and this stop part 13 touch to the time, this cutting knife spare 22 promptly forms state shown in the imaginary line, and this forward and backward swing arm 24,25 simultaneously i.e. no longer swing, just send cutter spare 21 no longer mobile.At this moment, this fork 12 continues these cutting knife spares of interlock 22 and moves, and moves as arc path and form a radian on this send the back guide groove 222 of cutter spare 21, and this sanctions line cutter 23 moves as arc path and blade 231 arrival of its front end of interlock are located simultaneously; When fork 12 interlocks send cutter spare 21 to arrive the location, the sanction line cutter 23 of these thread cutter member 22 front ends is done straight line and is moved between needlework 232, at this moment, mat is cut out line cutter 23 and is subjected to fork 12 action recurrence again, this cutting knife spare of transmission 22 and send cutter spare 21 to get back to the origin-location in regular turn with original radian path, this cuts out line cutter 23 when backhaul, and the sanction line cutter 23 of front end promptly cuts needlework 232, cuts out the line operation to finish.

Though the sanction line apparatus of Sewing machines can reach the purpose of cutting out line in the past, but still have following disappearance on reality is used: it is uncertain that (one) cuts out line:

The mobile route of cutting out the line cutter by what is that camber line advances or retreats, and therefore, the distance when between needlework hour causes blade to be set in fully between the needlework most probably, makes that needlework can not be by whole severings, and it is uncertain to cause cutting out line.(2) cutting out the adjustment of line cutter position is difficult for:

Substrate, send cutter spare and forward and backward swing arm to form a linkage, make the mobile route of cutting out the line cutter be always the arc path of wide-angle, therefore, after this sanction line apparatus breaks down maintenance, must readjust the position of cutting out the line cutter, by the spacing between the what needlework is not to immobilize, cut out the line cutter and still can cut all needlework simultaneously, the sanction line cutter that must time-consumingly with mobile route be camber line is adjusted to optimal position, needlework can't be cut otherwise cause easily totally, and cause position that be difficult for to adjust the sanction line cutter that camber line moves.

The purpose of this utility model provides a kind of line of cutting out to reach the sanction line apparatus that easy what adjustment is cut out the line cutter position, keeped in repair easy Sewing machines really at what.

The sanction line apparatus of the utility model Sewing machines, comprise that one is fixedly installed on the substrate on the Sewing machines, one is hubbed on the fork on the substrate, one can be by the sanction line cutter group of fork interlock, and be hubbed on the substrate and the swing arm of cutting out line cutter group interlock, this sanction line cutter group have one can on substrate, move send cutter spare, and one and send the cutting knife spare of the overlapping setting of cutter spare, cutting knife spare is provided with forward and backward guide groove, and an end of swing arm is tied with sending cutter spare pivot; Its feature is at what: this send the rear end of blade to be provided with a pivot connected slot, and an adjustment part is set on this substrate, and an end of this adjustment part slips in pivot connected slot, and this send and convexes with a guide member that is entrenched in the guide groove of back on the cutter spare.Driving this sanction line cutter group by the swing of fork is that the radian motion is done at the center with the pivoting point that swing arm is articulated in substrate, this send cutter spare by stop part retaining system simultaneously, and make this send cutter spare no longer by the fork interlock, at this moment, this fork continuation interlock cuts blade and is sending cutter spare moving linearly relatively, can locate really and make this cut blade, reach the effect of colluding the cutting line.

The sanction line apparatus of described Sewing machines, its feature are at what: between substrate and cutting knife spare one flexible member can be set, and the two ends of this flexible member are attached at substrate respectively and cut blade front end place.

The sanction line apparatus of described Sewing machines, its feature are at what: can establish one on this adjustment part and adjust groove.

The sanction line apparatus of described Sewing machines, its feature are at what: this substrate is provided with one and replys element with sending to be connected between cutter spare.

In sum, the utility model arrives the location through cutting out the line cutter with straight line path, and utilize the restoring force of elastic component, this sanction line cutter can be moved as camber line when backhaul, send the angle of cutter spare via adjusting this adjustment part with change, make to the utlity model has the advantage that the line cutter position is cut out in certain sanction line and easy what adjustment.

Below be elaborated by Cui embodiment and accompanying drawing sanction line apparatus to Sewing machines of the present utility model:

Fig. 1 is the schematic top plan view of the sanction line apparatus of Sewing machines in the past.

Fig. 2 is the schematic top plan view of the utility model than Cui embodiment.

Fig. 3～5 are respectively the continuous action schematic diagram of the utility model than Cui embodiment.

As shown in Figure 2, be the sanction line apparatus schematic top plan view of the utility model than Cui embodiment Sewing machines, the Sewing machines 6 of present embodiment is provided with driver 61, and this driver 61 can drive cuts out line apparatus 3, and this sanction line apparatus 3 comprises a substrate 31 that is fixedly installed on the Sewing machines 6, one be hubbed on the substrate 31 and can be driven the fork 32, of device 61 interlocks can be by the sanction line cutter group 4 of fork 32 interlocks, and is hubbed on the substrate 31 and the swing arm 33 of cutting out line cutter group 4 interlocks; Wherein, this substrate 31 is provided with one and replys an element 414 and an elastic component 35; In addition, cut out line cutter group 4 comprise one can on substrate 31, move send cutter spare 41, one and send the cutting knife spare 42 of cutter spare 41 overlapping settings, and moulding one clamping groove 421 on this cutting knife spare 42, supply this fork 32 to stretch and put, cutting knife spare 42 is provided with a front guide slot 422 and a back guide groove 423 simultaneously.

Send the rear end of cutter spare 41 to be provided with a pivot connected slot 411, and send at this and to convex with a guide member 412 on cutter spare 41, and this guide member 412 can be entrenched in the guide groove 423 of back, and send cutter spare 41 1 sides to protrude out a projection 413 at this.In addition, an end of this answer element 414 is attached at substrate 31, and the other end can for projection 413 touch to.A swing arm 32 is pivoted on this substrate 31, and an end of this swing arm 32 is sending on the cutter spare 41 via front guide slot 422 pivots of cutting knife spare 42 knot, and but the stop part 34 of an adjustment part 36 and a block projection 413 is set on this substrate 31, groove 361 is adjusted in moulding one on the adjustment part 36, and an end slips in pivot connected slot 411, cutting knife spare 42 during guiding is moved, utilize simultaneously and adjust the length that this adjusts the adjustment part 36 of groove 361, the mobile route of cutter spare 41 is sent in control, and this cutting knife spare 42 front ends fixedly install one and cut out line cutter 43.

When 32 swings of driver 61 interlock forks, except that sending cutter spare 41 moves to quicken this through the restoring force of this answer element 414, these fork 32 interlocks send cutter spare 41 and cutting knife spare 42 to move simultaneously, the pivoting point that send cutter spare 41 only to utilize swing arm 32 to be articulated on the substrate 31 by what is that the center produces swing, therefore, this send cutter spare 41 and the motion path that cuts blade 42 at first to move for low-angle arc path, up to sending the projection 413 on the cutter spare 41 to touch the stop part 34 (position as shown in Figure 3) that is against on the substrate 31, just send cutter spare 41 to be subjected to block and no longer continue to move.The position of colluding line pin 5 of the front end alignment Sewing machines 6 of cutting knife 43, this fork 32 continues this cutting knife spare of interlock 42 and moves, and through the guide member 412 that send on the cutter spare 41, and swing arm 33 and the guiding of sending cutter spare 41 articulated sections, make the cutting knife 43 on this cutting knife spare 42 do straight line and move, and arrive position as shown in Figure 4, be set between the needlework 55 when cutting knife 43 moves with straight line along colluding line pin 5, and elastic component 35 is compressed, so that fork 32 these cutting knife spares of interlock 42 travelling backwards.Originally this sanction line blade 42 is subjected to the effect of the elastic-restoring force of elastic component 35, make sanction line blade 42 be the state that arc path retreats as shown in Figure 5, sanction line cutter 43 is cut these needlework 55 with arc path, make and cut out the effect that line cutter 43 reaches certain severing needlework 55, cut out line blade 42 at last and be subjected to fork 32 perseverations again, swing arm 32 is driven send cutter spare 41 and cutting knife spare 42 to be the state of returning, get back to shown in Figure 2ly at last, cut out line and move to carry out next one.

Claims

1. the sanction line apparatus of a Sewing machines, comprise that one is fixedly installed on the substrate on the Sewing machines, one is hubbed on the fork on the substrate, one can be by the sanction line cutter group of fork interlock, and be hubbed on the substrate and the swing arm of cutting out line cutter group interlock, this sanction line cutter group have one can on substrate, move send cutter spare, and one and send the cutting knife spare of the overlapping setting of cutter spare, cutting knife spare is provided with forward and backward guide groove, and an end of swing arm is tied with sending cutter spare pivot; Its feature is at what: this send the rear end of blade to be provided with a pivot connected slot, and an adjustment part is set on this substrate, and an end of this adjustment part slips in pivot connected slot, and this send and convexes with a guide member that is entrenched in the guide groove of back on the cutter spare.

2. the sanction line apparatus of Sewing machines as claimed in claim 1, its feature are at what: a flexible member is set between substrate and cutting knife spare, and the two ends of this flexible member are attached at substrate respectively and cut blade front end place.

3. the sanction line apparatus of Sewing machines as claimed in claim 1, its feature are at what: be provided with one on this adjustment part and adjust groove.

4. the sanction line apparatus of Sewing machines as claimed in claim 1, its feature are at what: this substrate is provided with one and replys element with sending to be connected between cutter spare.