CN1769564B - Thread cutting method of thread cutting blade of straight-barrel type sewing machine - Google Patents

Abstract

The invention relates to a thread cutting method of a thread cutting blade of a straight-tube type sewing machine, which provides a method for a user to smoothly cut off a main thread of a main needle group and a bottom thread of a lower crochet needle arranged on a sewing machine platform and clamp and fix the bottom thread. The main thread of the main needle group and the bottom thread of the lower crochet hook are positioned at the thread cutting position by the pedal action of the sewing machine, so that the first thread cutting part and the second thread cutting part of the thread cutting blade can cut off the main thread of the main needle group and cut off and clamp the bottom thread of the lower crochet hook, thereby achieving the purpose of correct action of the sewing machine. The invention can avoid the problems that the first thread cutting part of the thread cutting blade is cut off and separated due to the position deviation of the bottom thread of the lower crochet hook and the threading is needed again.

Description

Cutting method of thread cutting blade of straight cylinder sewing machine

technical field

The invention relates to a thread cutting method, in particular to a thread cutting method with a thread cutting blade suitable for a straight cylinder sewing machine. the

Background technique

Generally used for tailoring or sewing machines such as weaving fabrics or clothes, because most of the structures are relatively complicated, and usually used by older people, due to poor eyesight, threading needles and threads has become a problem, and if problems occur, it is even more difficult to solve , so the structural design of the sewing machine must be very accurate and not prone to failure, so that it can be used by the public. However, today's sewing machine technology has developed to a mature stage, and this technology provides the textile industry with very fast and economical benefits. In order to make high-quality and cheap ready-made clothes for people, in order to highlight the technical key points of the present invention, the following is the current sewing machine, with illustrations, as follows:

Please refer to Fig. 1, which is a perspective view of a part of the structure of an existing conventional straight cylinder sewing machine. The driving mechanism 11 is a driver 12 for reciprocating motion and a needle group 13, wherein the thread cutter 10 includes a thread trimmer blade 100 and a fixed blade 101, and the thread trimmer blade 100 and the fixed blade 101 are arranged on the top of the sewing table of the sewing machine , the fixed blade 101 is formed by superimposing and fixing an upper fixed blade 102 and a lower fixed blade 103, and there is a space provided between the upper fixed blade 102 and the lower fixed blade 103 to provide the passage of the aforementioned thread cutting blade 100. 100 and the upper and lower fixed blades 102, 103 cut the yarn. In addition, the aforementioned thread cutting blade 100 has a first cutting portion 104 and a second cutting portion 105. The first cutting portion 104 is used to cut the yarn. The second thread cutting part 105 is used to clamp the remaining section of the yarn to solve the problem of rethreading caused by the complete cutting of the yarn; The main needle group 130 and a lower hook needle 131 that is provided with a bottom thread (not shown in the figure), the main needle group 130 and the lower hook needle 131 are driven by a driving device (not shown in the figure), and then form the knitting cloth. action. the

It can be seen from the above-mentioned structure that the first thread cutting part 104 and the second thread cutting part 105 of the thread cutting blade 100 are used to solve the problem of rethreading due to the complete cutting of the yarn. The main needle group 130 with the main thread and the lower hook needle 131 with the bobbin thread threaded, after the sewing operation is finished, when the thread cutter 10 is cut and clamped, the main thread should be cut by the first thread cutting part 104 of the thread cutter blade 100 However, due to problems such as machine vibration or poor design, the bottom thread that passes through the lower hook needle 131 is often cut by the second thread trimmer 105 of the thread trimmer blade 100 and clamped. The thread cutting part 104 is cut and the bottom thread is separated, causing the problem of needing to re-thread the thread. If it is used by the elderly, it will definitely increase the trouble. Therefore, the existence of this problem has become a big problem to be solved by the industry.

As we all know, the most complicated, the most precise and the most difficult to change of the sewing machine is in the small cylinder at the front end. It takes a long time to experiment and experiment, design and design to make a small change in the cylinder. Therefore, even if there is a small change in the small cylinder at the front of the sewing machine, it is not familiar with the technology. can be easily achieved. the

This shows that the above-mentioned existing straight tube type tailoring machine's thread cutting blade thread cutting method obviously still has inconvenience and defects in method and use, and needs to be further improved urgently. In order to solve the problems existing in the thread cutting method of the straight cutting machine, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable method for the general method Being able to solve the above-mentioned problems is obviously a problem that relevant industry players are eager to solve. the

In view of the above-mentioned defects in the thread cutting method of the existing straight-shaped tailoring machine, the inventor actively researches and innovates based on his rich practical experience and professional knowledge in the design and manufacture of this type of product for many years, and in cooperation with the application of theories. In order to create a new thread-cutting blade thread-cutting method of a straight cylinder type sewing machine, the general existing thread-cutting blade thread-cutting method can be improved to make it more practical. Through continuous research, design, and after repeated trials and improvements, the present invention with practical value is finally created. the

Contents of the invention

The purpose of the present invention is to overcome the defects of the thread trimming blade thread cutting method of the existing straight cylinder type tailoring machine, avoid the existence of the problem, and provide a new thread trimming blade thread cutting method of the straight cylinder type tailoring machine, the technology to be solved The problem is to provide a thread trimming method that allows the thread trimming blade of the sewing machine to smoothly and correctly cut off the main thread of the main needle group and cut off, clamp and fix the bottom thread of the hook needle, so that it is more suitable for practical use. the

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to the thread cutting method of a straight-shaped sewing machine proposed by the present invention, the thread cutting blade 100 includes a first thread cutting part 104 and a second thread cutting part 105, and the pedal action of the sewing machine will install The main line of the main needle group 130 on the sewing machine platform 24 and the bottom line of the lower hook needle 131 are smoothly cut off and clamped to fix the bottom line, or the presser foot 23 on the sewing machine platform 24 is lifted or the sewing machine is operated. Tailor action, the method includes the following steps:

(a). The main needle group 130 and the lower hook needle 131 are in the initial position state, and enter step (b);

(b). Determine whether the pedal has been depressed, if so, go to step (c), otherwise go back to step (a);

(c). Determine whether the pedal is pressed forward, if yes, enter step (f), otherwise, enter step (d);

(d). Lift the presser foot 23, and enter step (e);

(e). Determine whether the pedal is continuously depressed, if so, return to step (d), otherwise, enter step (b);

(f). The tailoring machine performs a tailoring action and enters step (g);

(g). Determine whether the pedal is continuously depressed, if so, return to step (f), otherwise, enter step (h);

(h). Determine whether the pedal is depressed, if so, enter step (i), otherwise repeat step (h);

(i). Determine whether the pedal is pressed forward, if yes, enter step (f), otherwise, enter step (j);

(j). The main needle group 130 makes a lower needle action and returns to the first tangent position, and the lower hook needle 131 moves corresponding to the main needle group 130 and returns to the second tangent position, and enters step (k);

(k). The thread cutting blade 100 performs a thread cutting action, the main thread of the main needle group 130 is cut off by the first thread cutting part 104 and the bottom thread of the lower hook needle 131 is cut and clamped by the second thread cutting part 105 Fix, and revert to step (a). the

The purpose of the present invention and the solution to its technical problems can also be further realized by adopting the following technical measures. In the thread cutting method of the aforementioned straight cylinder sewing machine, the first thread cutting position is located between the sewing machine platform 24 and the presser foot 23 . the

Compared with the prior art, the present invention has obvious advantages and beneficial effects. It can be seen from the above technical solutions that, in order to achieve the aforementioned object of the invention, the present invention proposes a thread cutting method for a straight-shaped tailoring machine, which includes the following steps: (a). Initial position state, enter step (b); (b) .Determine whether the pedal has been pressed, if so, go to step (c), otherwise, return to step (a); (c). Determine whether the pedal is pressed forward, if yes, go to step (f), otherwise, then Enter step (d); (d). Lift the presser foot, and enter step (e); (e). Determine whether the pedal is continuously pressed, and if so, return to step (d); otherwise, enter step (b ); (f). Make a tailoring action, and enter step (g); (g). Determine whether the pedal is continuously pressed, and if so, return to step (f), otherwise, enter step (h); (h) .Determine whether the pedal has been pressed down, if so, enter step (i), otherwise, repeat step (h); (i). Determine whether the pedal is pressed forward, if yes, enter step (f), otherwise, enter Step (j); (j). The main needle group and the lower hook needle are respectively positioned at the first tangent position and the second tangent position, and enter into step (k); (k). Perform thread cutting action, and return to step (a). the

By means of the above-mentioned technical scheme, the thread cutting method of the straight cylinder sewing machine of the present invention has at least the following advantages: the technical feature of the present invention is that the main thread of the main needle group and the bottom thread of the lower hook needle are positioned at The thread trimming position allows the first thread trimming part and the second thread trimming part of the thread trimming blade to respectively achieve the purpose and effect of cutting off the main thread of the main needle group and cutting off and clamping and fixing the bottom thread of the lower hook needle. the

From the above, it can be known that the thread cutting method of the straight cylinder sewing machine of the present invention provides a method that allows the user to smoothly cut off and clip the main thread of the main needle group and the bottom thread of the lower hook needle installed on the sewing machine platform. maintain a fixed method. It uses the pedal action of the sewing machine to position the main thread of the main needle group and the bottom thread of the lower hook needle at the thread cutting position, so that the first thread cutting part and the second thread cutting part of the thread trimming blade can cut off the main thread of the main needle group and cut it off. Clamping and fixing the bottom thread of the lower hook needle, so as to achieve the purpose of correct movement of the sewing machine. The present invention can effectively avoid the situation that the bottom thread of the lower hook needle is cut off by the first thread cutting part of the thread trimmer blade due to the position deviation and is separated from the situation, which causes the problem that the thread needs to be threaded again. the

To sum up, the special thread trimming method of the straight cylinder sewing machine of the present invention provides a method for the thread trimming blade of the tailoring machine to smoothly and correctly cut off the main thread of the main needle group and cut off, clamp and fix the lower hook The method of cutting the bottom thread of the needle. It has the above-mentioned many advantages and practical value, and no similar design has been published or used in similar methods, so it is indeed innovative. It has great improvements in both methods and functions, and has a great technical advantage. It has improved, and has produced easy-to-use and practical effects, and has improved multiple functions compared with the existing straight-shaped tailoring machine's thread-cutting blade cutting method, so it is more suitable for practical use, and has a wide range of industrial application values. Sincerely A novel, progressive and practical new design. the

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings. the

Description of drawings

FIG. 1 is a schematic perspective view of a part of the structure of a conventional straight cylinder sewing machine. the

Fig. 2 is a flow chart of the present invention. the

Fig. 3-1, Fig. 3-2, Fig. 3-3 are partial action diagrams of the present invention. the

Fig. 4 is a schematic plan view of the positioning of the main needle group at the first tangent line in step j in Fig. 2 of the present invention. the

Detailed ways

In order to further explain the technical means and effects that the present invention adopts to achieve the intended purpose of the invention, below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation of the thread trimming blade thread cutting method of the straight cylinder sewing machine proposed according to the present invention, The method, steps, features and effects thereof are described in detail below. the

Please refer to Fig. 3-1, Fig. 3-2, Fig. 3-3 and Fig. 4 in combination. The present invention is based on a simple process flow, so that the bottom thread of the downward hook needle 131 is easy to let the thread trimming blade 100 due to position deviation. The problem that the first tangent portion 104 is cut off and detached and the thread needs to be re-threaded is effectively solved. The following is the representation and detailed explanation in conjunction with the drawings, and the description is as follows. the

According to a preferred embodiment of the present invention, a thread cutting method of a straight-shaped sewing machine with a thread cutting blade 100, the thread cutting blade 100 includes a first thread cutting part 104 and a second thread cutting part 105, and the thread cutting blade 100 is moved by the pedal of the sewing machine. The main thread of the main needle group 130 and the bottom thread of the lower hook needle 131 installed on the sewing machine platform 24 are smoothly cut off and clamped to fix the bottom thread, or the presser foot 23 is lifted or the sewing machine is allowed to perform a tailoring action. Please refer to Fig. 2 again, which is a flow chart of the present invention. As shown in the figure, the thread trimming blade thread cutting method of the straight cylinder type tailoring machine of the preferred embodiment of the present invention includes the following steps:

a. Initial state: the aforementioned main needle group 130 and lower hook needle 131 are in the initial position state;

b. Determine whether the pedal has been depressed: determine whether the aforementioned pedal has been depressed, if so, proceed to step c, otherwise return to step a (that is, determine whether the user has depressed the pedal);

c. Determine whether the pedal is pressed forward: determine whether the aforementioned pedal is pressed forward, if so, enter step f, otherwise, enter step d (if it is not stepped forward, it is stepped backward);

d. Lift the presser foot 23: lift the aforementioned presser foot 23 to allow the user to collect or reposition the fabric, and enter step e;

e. Determine whether the pedal is continuously depressed: determine whether the aforementioned pedal is continuously depressed (that is, whether the user continues to step on the pedal), if so, then return to step d (continuously lift the presser foot 23), otherwise, then Enter step b (re-judging whether the pedal is pressed again);

f. Make tailoring action: the user controls the aforementioned sewing machine to perform tailoring action, and enter step g;

g. Determine whether the pedal is continuously depressed: determine whether the aforementioned pedal is continuously depressed, and if so, return to step f (continue to make tailoring action), otherwise, enter step h (that is, stop, and re-judge whether the pedal is pressed) Down);

h. Determine whether the pedal has been depressed: determine whether the aforementioned pedal has been depressed, if so, enter step I (if the pedal is stepped down by the user, enter the next step for direction judgment), otherwise repeat step h (if the pedal If it is not stepped on by the user, it will always be in this judgment step);

i. Determine whether the pedal is pressed forward: determine whether the aforementioned pedal is pressed forward, if so, enter step f (make tailoring action again), otherwise, enter step j (depress the pedal backward by the user, enter next step);

j. The main needle group 130 and the lower hook needle 131 are respectively positioned at the first tangent position and the second tangent position: the above-mentioned main needle group 130 performs the lowering action (insert one needle into the platform 24) and returns to the first tangent position. thread position (the best embodiment is located between the sewing machine platform 24 and the presser foot 23), and the lower hook needle 131 is linked to the action of the main needle group 130 and returns to the second thread tangent position, and enters step k (Because the main needle group 130 and the lower hook needle 131 act in a linked manner, so when the main needle group 130 is positioned at the first tangent position, the lower hook needle 131 will be moved by the main needle group 130 and positioned at the first Two tangent positions, the first tangent position and the second tangent position are the best relative positions for the main needle group 130 and the lower hook needle 131 to allow the thread trimmer blade 100 to cut the line);

k. Do the thread cutting action: the aforementioned thread cutting blade 100 performs the thread cutting action, the main thread of the main needle group 130 is cut off with the first thread cutting part 104 of the thread cutting blade 100 and the second thread cutting part 105 of the thread cutting blade 100 Cut off the bottom thread of the lower hook needle 131 and fix it by clamping, and return to step a (that is, the thread cutting action is completed, that is, the main needle group 130 and the lower hook needle 131 are returned to the initial position). the

From the above-mentioned steps, it can be clearly seen that the present invention completes the entire automatic thread cutting action in different steps. From steps j and k, it can be found that the main needle group 130 and the lower hook needle 131 are positioned at the most suitable position. After the first tangent position and the second tangent position of the thread cutting, the thread cutting can be carried out, and then return to the position of the initial state a. In this way, the bottom thread cause of the conventional lower hook needle 131 can be avoided. The position is deviated so that the first thread cutting portion 104 of the thread cutting blade 100 is cut off and detached, which causes the problem that the thread needs to be threaded again. the

Please refer to Fig. 3-1, Fig. 3-2, Fig. 3-3 and Fig. 4, which are schematic diagrams of partial actions of the present invention, and the main needle group 130 of step j in Fig. 2 of the present invention is positioned at the first cut A schematic plan view of the position of the thread, as shown in the figure, which includes the main needle group 130, the lower hook needle 131, the thread trimmer blade 100, the presser foot 23 and the sewing machine platform 24. From these drawings, the present invention can be more clearly understood j, The action of step k is to first make the main needle group 130 and the lower hook needle 131 perform the lowering action (as shown in Figure 3-1), and then make the main needle group 130 return to the first tangent position (as shown in Figure 3-1). 2 and Figure 4, it is located between the sewing machine platform 24 and the presser foot 23) and the lower hook needle 131 is returned to the second tangent position (as shown in Figure 3-2), at this time the thread trimmer blade 100 performs thread cutting Action, and finally the main needle group 130 and the lower hook needle 131 return to the initial state a position (as shown in Figure 3-3), that is, the process of automatic thread cutting of the thread trimmer blade of the present invention is completed. the

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the method and technical content disclosed above to make some changes or modifications to equivalent embodiments with equivalent changes, but if they do not depart from the technical solution of the present invention, Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention. the

Claims (2)

1. the trimming blade tangential method of a straight barrel type sartorius, it is characterized in that this trimming blade (100) includes the first tangent line portion (104) and the second tangent line portion (105), it is pedal action with this sartorius, the main line that will be installed in the main pin group (130) on this sartorius platform (24) reaches down, and the bottom line of bearded needle (131) successfully cuts off and grips this bottom line, or make signature pin (23) on this sartorius platform (24) lift or allow sartorius do tailor's action, this method may further comprise the steps:

(a). this main pin group (130) and this time bearded needle (131) are positioned at the initial position state, and enter step (b);

(b). judge whether this pedal is depressed,, otherwise then be back to step (a) if then enter step (c);

(c). judging whether this pedal is depressed forward, is then to enter step (f), otherwise, then enter step (d);

(d). lift this signature pin (23), and enter step (e);

(e). judge whether this pedal continues to be depressed, in this way, then be back to step (d), otherwise, then enter step (b);

(f). this sartorius is done tailor's action, and enters step (g);

(g). judge whether this pedal continues to be depressed, then be back to step (f) in this way, otherwise, then enter step (h);

(h). judge whether this pedal is depressed, if then enter step (i), on the contrary repeating step (h) then;

(i). judging whether this pedal is depressed forward, is then to enter step (f), otherwise, then enter step (j);

(j). this main pin group (130) does down that pin action also returns back to first tangent position, and this time bearded needle (131) is to should main pin group (130) moving and return back to second tangent position, and enters step (k);

(k). this trimming blade (100) does to cut out line action, with this first tangent line portion (104) will this main pin group (130) main line cut off and this second tangent line portion (105) with the bottom line cut-out of this time bearded needle (131) and grip, and return back to step (a).

2. the trimming blade tangential method of straight barrel type sartorius according to claim 1 is characterized in that wherein said first tangent position is to be positioned between this sartorius platform (24) and the signature pin (23).

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