CN208266418U - A kind of flat seam machine having dise knife thread cutting mechanism - Google Patents

Abstract

The utility model relates to technical field of sewing machines, more particularly to a kind of flat seam machine for having dise knife thread cutting mechanism, the dise knife thread cutting mechanism includes the stationary knife being fixed on flat seam machine casing and the moving knife that is fixed on movable knife rack, the vertical range of the flat seam machine eedle center line and the center line of flat seam machine feed dog motion profile in the vertical direction is 4mm, the maximum needle gage of the flat seam machine is 5mm, the vertical range d value range of the edge of a knife of the stationary knife and the center line of the flat seam machine feed dog motion profile in the vertical direction are as follows: 2.5mm < d≤4mm., it can be achieved that after trimming completion, the effect that remaining the end of a thread on fabric shortens can avoid the process for carrying out artificial correction the end of a thread again, substantially increase quality of sewing and work task efficiency the utility model above-mentioned technical proposal to sewed products such as the clothes of high request.

Description

A kind of flat seam machine having dise knife thread cutting mechanism

Technical field

The utility model relates to technical field of sewing machines, in particular to a kind of flat seam machine for having dise knife thread cutting mechanism.

Background technique

Current design and the flat seam machine of production are equipped with flat cutter thread cutting mechanism or dise knife thread cutting mechanism, dise knife trimming mostly The mode that mechanism mostly uses moving knife and stationary knife to cooperate, stationary knife are fixed on flat seam machine casing, positioned at the side of eedle, moving knife installation On movable knife rack.Moving knife follow(er) rest under shear spool driving rotates when trimming, is engaged with stationary knife, carries out trimming to lower wire loop. To avoid interfering between neighbouring part, relatively large distance is kept between the stationary knife edge of a knife and eedle in existing design, is made After line must having been cut, the remaining the end of a thread of upper thread is longer.If needed to keep stitching beauty to improve the quality of sewing Increase the process of trimming the end of a thread in sewing, sewing efficiency is affected.

Utility model content

In view of the foregoing deficiencies of prior art, the purpose of this utility model is to provide one kind to have dise knife thread trimmer The flat seam machine of structure remains stub after shortening trimming, improves sewing efficiency by setting the suitable distance of stationary knife and eedle.

In order to achieve the above objects and other related objects, an embodiment of the utility model provides one kind and has dise knife The flat seam machine of thread cutting mechanism, the dise knife thread cutting mechanism include the stationary knife being fixed on flat seam machine casing and are fixed on movable knife rack Moving knife, center line of the flat seam machine eedle center line with flat seam machine feed dog motion profile in the vertical direction it is vertical away from It is 5mm from the maximum needle gage for 4mm, the flat seam machine, the edge of a knife of the stationary knife and the flat seam machine feed dog motion profile exist The vertical range d value range of center line on vertical direction are as follows: 2.5mm < d≤4mm.

In a preferred embodiment, the value range of d are as follows: 2.5mm < d≤2.84mm.

In a preferred embodiment, d=2.84mm.

The utility model embodiment provide above-mentioned technical proposal, it can be achieved that trimming complete after, the remnants on fabric The effect that the end of a thread shortens can avoid the process for carrying out artificial correction the end of a thread again, mention significantly to sewed products such as the clothes of high request High quality of sewing and work task efficiency.

Detailed description of the invention

Fig. 1 is shown as the floor map of the utility model dise knife thread cutting mechanism；

Fig. 2 is shown as the schematic diagram of stationary knife Yu eedle relative positional relationship；

Fig. 3 is shown as the schematic illustration of the stationary knife edge of a knife and eedle distance relation in the utility model.

Component label instructions

1 bottom plate

2 movable knife racks

3 stationary knifes

4 eedles

5 moving knife

6 eedle center lines

7 feed dog motion profile vertical directions

Center line

Specific embodiment

The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by this Content disclosed by specification understands other advantages and effect of the utility model easily.

It should be clear that structure, ratio, size etc. depicted in this specification attached drawing, only to cooperate disclosed in specification Content, for those skilled in the art understand and read, be not intended to limit the utility model enforceable qualifications, Therefore not having technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing this reality With under novel the effect of can be generated and the purpose that can reach, should all still falling in the revealed technology contents institute of the utility model In the range of capable of covering.Meanwhile it is cited such as "upper", "lower", "left", "right", " centre " and " one " in this specification Term is merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model, the change of relativeness Or adjustment, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the utility model.

The motion profile of flat seam machine feed dog is oval (track is obtained on the basis of feed dog central point), It is limited by the highs and lows on vertical direction and the limit point in two horizontal directions.As shown in figure 3, situation 1A is Theoretical case, the i.e. center line 6 of eedle 4 are overlapped with the center line of feed dog motion profile in the vertical direction.It and is to avoid machine Interference between needle and feed dog, actual conditions are as shown in situation 2B, i.e., the center line 6 of eedle 4 and feed dog motion profile are perpendicular A vertical range b is kept between the upward center line 7 of histogram.The utility model it is targeted be b be 4mm, maximum needle gage is 5mm Flat seam machine, dise knife thread cutting mechanism therein includes stationary knife 3 and moving knife 5, and stationary knife 3 is fixed on flat seam machine casing, the present embodiment In be specifically be fixed on bottom plate 1.Moving knife 5 is fixed on movable knife rack 2, and shear spool (not shown) passes through transmission mechanism, such as song Handle link mechanism is connect with movable knife rack 2.Stationary knife 3 is located at the side of eedle 4, and the edge of a knife is close to eedle 4, as shown in Fig. 2, stationary knife 3 The center line of the edge of a knife and eedle 4 keeps certain vertical range c.When trimming, shear spool drives the rotation of the related moving knife 5 of movable knife rack 2, Moving knife 5 turns to stationary knife 3, when the knife edge contact of the edge of a knife of stationary knife 3 and moving knife 5, starts to carry out trimming.In existing design, stationary knife The vertical range d of the edge of a knife and the center line 7 on feed dog motion profile vertical direction is between 2-2.5mm, that is to say, that the value of c Between 1.5-2mm.

It studies through applicant and is found with test repeatedly, in the case where guaranteeing assembly precision, d can be extended x, so that reach 4mm, the operations such as trimming, the work feed of flat seam machine can still operate normally, and stationary knife shortens at a distance from eedle, and wire loop drives in moving knife The distance for reaching trimming position shortens therewith, and the position of trimming shifts to an earlier date, therefore remaining the end of a thread after trimming can be made to shorten.And In the case where influencing in view of component assembly precision, d can extend x to 2.84mm, which can have both been met to stitching beauty It is required that the preferred value of the requirement of component assembly precision can also be reduced.

The studies above based on the utility model, can be by the vertical range of the optimization stationary knife edge of a knife to eedle center line to reach It, can be by adjusting the opposite locating distance of stationary knife and eedle to the purpose for shortening the end of a thread, such as on the basis of existing flat seam machine From realizing, can also be realized by way of lengthening the stationary knife edge of a knife.For example, in former design, d 2.04mm, the stationary knife edge of a knife and machine The distance of needle is 1.96mm originally, and d is extended to 2.84mm by way of lengthening knife edge length, make the stationary knife edge of a knife and eedle away from From 1.16mm is foreshortened to, i.e., the length that the stationary knife edge of a knife lengthens x=0.8mm changes in the case that former trimming stub is 4-5mm Stub after can then be as short as 3.5mm, which needs not move through trimming process can meet the sewing for guaranteeing stitching beauty It is required that.

After the thread trimmer structure of the utility model is, it can be achieved that trimming completes, the effect that remaining the end of a thread on fabric shortens, The sewed products such as the clothes to high request, can avoid again carry out artificial correction the end of a thread process, substantially increase quality of sewing and Work task efficiency.

The above embodiments are only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model All equivalent modifications or change completed under mind and technical idea, should be covered by the claim of the utility model.

Claims (3)

1. a kind of flat seam machine for having dise knife thread cutting mechanism, the dise knife thread cutting mechanism includes being fixed on flat seam machine casing to determine Knife and the moving knife being fixed on movable knife rack, the flat seam machine eedle center line and flat seam machine feed dog motion profile are in vertical direction On the vertical range of center line be 4mm, the maximum needle gage of the flat seam machine is 5mm, it is characterised in that:

The vertical range d of center line of the edge of a knife of the stationary knife with the flat seam machine feed dog motion profile in the vertical direction takes It is worth range are as follows: 2.5mm < d≤4mm.

2. flat seam machine according to claim 1, it is characterised in that:

The value range of d are as follows: 2.5mm < d≤2.84mm.

3. flat seam machine according to claim 2, it is characterised in that:

D=2.84mm.