CN206607401U - Automatic Thread Cutting Device for Lapper Machine - Google Patents

Abstract

The utility model provides a draw automatic tangent line device of group's machine, include: thread cutting mechanism and controller, thread cutting mechanism is used for drawing the sewing operation execution thread cutting task of group's machine in coordination by the controller control, and thread cutting mechanism includes: the thread cutting device comprises a driver and a thread cutting knife, wherein the driver can push the thread cutting knife from a normal standby position to a thread hooking position, a thread to be cut is hooked by using the edge part of the thread cutting knife, the driver can pull the thread cutting knife hooked with the thread to the standby position, and the thread kept in a tension state is cut by using the edge part. The utility model discloses can solve the current problem that draws group's machine to cut off the line with manual mode so that the productivity hangs down, simultaneously after cutting off the sewing line, can remain the end of a thread of unanimous and enough length at the needle stick, needn't threading once more just can carry out next sewing task immediately.

Description

Automatic Thread Cutting Device for Lapper Machine

technical field

The utility model relates to a sewing machine, in particular to an automatic thread-cutting mechanism of a flapping machine, which can solve the problem that the existing flapping machine cuts threads manually so that the production capacity is low.

Background technique

The lasting machine is a special sewing machine suitable for stitching sports shoes, California-style midsoles, work gloves, medium-thick fur, diving suits or doll shoes, which is different from the general household sewing machine. For the technology and action of the gluing machine, please refer to the Taiwan Invention Patent No. I489954 "Langering Machine", the new patent announcement No. 542251 "Auxiliary feeding device for the gluing machine", and the new patent No. M251488 "The driving structure of the feeding wheel of the lasting machine".

Since the gluing machine is mainly used as a special sewing machine for industrial purposes and is used to mass-produce the above-mentioned sewing products, the requirements for the durability and reliability of the gluing machine are higher than those of ordinary household sewing machines. In addition, for the production line workers who actually operate the lasting machine, after completing the sewing task of a sewn product, they must cut off the sewing thread connected to the sewn product before proceeding to the next sewing Operation.

Most of the known lasting machines, such as the aforementioned several known single-needle lasting machines, do not have thread trimmers. As far as the production line of sewing operation is concerned, it will seriously affect the sewing speed and production capacity, and it is not easy to leave a fixed length of sewing thread on the needle bar by manually cutting the sewing thread. If the thread end is too long, it will cause too much waste. If the thread end of the sewing thread left on the needle bar falls off from the needle bar because it is too short, it needs to be re-threaded, which is not conducive to the maintenance of production capacity.

Utility model content

The technical problem to be solved by the utility model is to provide an automatic thread cutting device of the lasting machine, which is used to solve the problem that the existing lasting machine cuts the thread manually so that the production capacity is low. The rod retains a consistent and long enough thread end to move on to the next sewing task immediately without rethreading.

In order to solve the above-mentioned technical problems, an embodiment structure of the automatic thread cutting device of the lasting machine of the present invention includes: a thread cutting mechanism and a controller, and the thread cutting mechanism is controlled by the controller to cooperate with the sewing operation of the pasting machine to perform thread cutting Task, the thread cutting mechanism includes: a driver and a thread cutter, the driver can push the thread cutter from the normal standby position to the thread hook position, use the edge of the thread cutter to hook the sewing thread to be cut off, and the driver can hook the hooked sewing thread The thread cutter of the thread is pulled back to the standby position, and the tensioned sewing thread is cut off by the blade. The thread outlet salad is controlled by the controller to maintain the tension of the sewing thread and control the thread exit and stop of the thread exit. The utility model can solve the problem that the production capacity is low due to the manual thread trimming of the existing lasting machine. At the same time, after the sewing thread is cut off, a consistent and sufficient thread end can be kept on the needle bar, and the next thread can be carried out immediately without re-threading. Sewing tasks.

In an embodiment of the present invention, the driver is a driver capable of reciprocating motion.

The preferred embodiment of the driver includes: any one of a bidirectional pneumatic cylinder and an electromagnetic driver.

In one embodiment of the present invention, the blade of the thread cutter is a hook-shaped blade, which is used to hook the sewing thread to be cut when the thread cutter reaches the hook position, and then keep the sewing thread tense In the state, cut the sewing thread by pulling back the thread cutter.

In a preferred embodiment of the present utility model, wherein the thread cutter is arranged on the side of the sewing object facing the needle bar seat, and the thread cutter extends obliquely toward the hook thread position at an oblique angle to the car to be cut off. Below the suture, use the hook-shaped blade to hook the suture to be cut.

In a preferred embodiment of the present invention, before cutting the sewing thread, the controller controls the thread-out salad of the side-hanging machine to clamp the sewing thread to stop the thread-out.

Regarding the specific implementation manners and other advantages and effects of the present invention, it will be described as follows with reference to the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is an exploded view of the structure of an embodiment of the automatic thread cutting device of the utility model;

Fig. 2 is a partial structural diagram of the automatic thread cutting device of the side forming machine of the present invention, showing the structure of the thread cutting knife;

Fig. 3A-Fig. 3G are the continuous action diagrams of the side-hanging machine of the present utility model, showing the automatic thread-cutting action of the thread-cutting mechanism from a top view;

Fig. 4A is the right side view of Fig. 3A;

Figure 4B is a front side view of Figure 3C;

Figure 4C is a front side view of Figure 3E;

Fig. 5A is a schematic diagram of the tangent operation of the side-hanging machine of the present invention, showing the top view structural diagram of the thread cutter reaching the hook line position;

Figure 5B is a front view of Figure 5A;

Figure 5C is a right side view of Figure 5A.

Symbol Description

10 Controller 11 Thread trimming button

21 needle bar 22 crochet hook

23 Salads 231 Salad Slices

232 Pneumatic cylinder 24 Needle bar seat

30 drive 40 thread cutter

41 Blade 42 Piercing

43 Connection assembly 44 Tool holder

50 Arrow 60 Cut-off point position

70 Sewing item L Sewing thread

L1 coil L2 new coil

P presser

detailed description

Please refer to Fig. 1 at first, which is an exploded view of the structure of an embodiment of the automatic thread cutting device of the present invention. First, make a brief description of the main components of the lasting machine. Figure 1 does not show all the main components of the lasting machine. The implementation of the automatic thread cutting device of the utility model and its technical content, to understand how the automatic thread cutting device proposed by the utility model cooperates with the sewing operation of the upper side machine to perform the thread cutting task.

In terms of function, the lasting machine can be roughly divided into the following main parts, including: a sewing mechanism, which is used to drive the sewing thread L to pass through the sewing object 70 (please refer to FIG. 3A ), and in the sewing object 70 Forming the sewing structure; the feeding mechanism, the pressure wheel shown in Figure 1 is a part of the feeding mechanism, used to drive the sewing object 70 to pass through the sewing position of the sewing mechanism; the driving mechanism, used to drive the above-mentioned sewing Mechanism and feeding mechanism operation; Presser P, in order to push down and limit the top edge of sewing object 70 in the process that sewing object 70 moves; And controller 10, in order to control described sewing mechanism, feeding mechanism and The start and stop action of the drive mechanism. Wherein the sewing mechanism basically includes: a needle bar 21, a crochet needle 22 and an outlet salad 23, the outlet salad 23 is mainly used for maintaining the tension of the sewing thread L and controlling the thread-out of the sewing thread L and the action of stopping the thread-out. After going through the outlet salad 23, the thread end of the sewing thread L must pass through the pinhole of the needle bar 21 and retain a sufficient length of thread end in the needle bar 21. The needle bar 21 is fixedly installed on the needle bar seat 24, and the needle bar seat 24 is connected to the drive mechanism, the needle bar seat 24 driven by the drive mechanism drives the needle bar 21 to pierce the sewing object 70 reciprocally, the tractor suture thread L passes through the sewing object 70, and under the cooperative operation of the crochet needle 22, the The sewing object 70 forms a sewing structure composed of sewing lines L, and at the same time, the feeding mechanism continuously drives the sewing object 70 to pass through the sewing position of the sewing mechanism, and then the sewing operation of the sewing object 70 is completed.

Please refer to Fig. 1, the structure of an embodiment of the automatic thread cutting device of the side-hanging machine of the present invention, including: a thread-cutting mechanism and the controller 10, the thread-cutting mechanism is controlled by the controller 10 to cooperate with the car of the side-hanging machine sewing job to perform thread cutting tasks. Wherein the thread cutting mechanism includes: a driver 30 and a thread cutter 40, the driver 30 can push the thread cutter 40 from the normal stand-by position to the thread hooking position, utilize the blade portion 41 of the thread cutter 40 to hook the sewing thread L to be cut off, and the driver 30 The thread cutter 40 that has hooked the sewing thread L can be pulled back to the standby position, and the sewing thread L kept in a tensioned state can be cut by the blade portion 41 .

In a preferred embodiment of the present utility model, the driver 30 is a driver 30 capable of reciprocating motion, and the driver 30 includes, but is not limited to, for example: any one of a two-way pneumatic cylinder and an electromagnetic driver. What is shown in FIG. 1 is A two-way pneumatic cylinder is used as the driver 30 .

Referring to Fig. 2, the head end of the thread cutter 40 has a blade portion 41, the blade portion 41 is a hook-shaped blade portion 41 for hooking the sewing thread L to be cut when the thread cutter 40 reaches the thread hook position, Then, under the condition that the sewing thread L is kept tense, the sewing thread L is cut by the action of pulling back the thread cutter 40 . As shown in Figure 1, in a preferred embodiment of the present invention, the tail end of the thread cutter 40 has an elongated perforation 42, and the tail end of the thread cutter 40 passes through the connecting assembly 43 (such as a bolt) that passes through the perforation 42 ) is mounted on the knife seat 44, and the other end of the knife seat 44 is connected to the driver of the driver 30 (such as the piston rod of the two-way pneumatic cylinder), preferably, the long axis direction of the perforation 42 extends along the reciprocating direction of the driver 30 , the start and end positions of the thread cutter 40 in the reciprocating movement stroke can be adjusted through the connecting assembly 43 .

An embodiment shown in Figure 5A, wherein the thread cutter 40 is arranged on the side of the sewing object 70 towards the needle bar seat 24 (the inside of the sewing object 70 as hereinafter referred to), specifically, the thread cutter 40 The position is between the sewing object 70 and the crochet needle 22. After the crochet needle 22 hooks the loop L1 formed by the sewing thread L and returns to the inside of the sewing object 70, the controller 10 will start the driver 30 of the thread cutting mechanism, using The driver 30 pushes the thread cutter 40 from the normal standby position (see FIG. 4A) to the thread hook position (see FIG. 5C); Protrude obliquely toward the hook thread position at an oblique angle, and make the blade portion 41 of the thread cutter 40 reach below the sewing thread L to be cut off, and use the hook-shaped blade portion 41 to hook the sewing thread to be cut off Line L. Preferably, before cutting off the sewing thread L, the controller 10 controls the outlet salad 23 of the side-hanging machine to clamp the sewing thread L to stop the thread (mainly using the pneumatic cylinder 232 in the outlet salad 23 to drive two salad pieces 231 Clamp the sewing thread L), so that the sewing thread L to be cut can be kept in a tense state, and then the thread cutting knife 40 can be pulled back to the normal standby position by the driver 30 to cut off the sewing thread L.

Below through Fig. 3A-Fig. 3G, the continuous action of the automatic thread cutting device of the lasting machine proposed by this creation is illustrated. In order to facilitate the understanding of the action of the needle bar 21 and the crochet needle 22, the presser P and the feeder are not shown in the figure, and Only some of the components of thread salad 23 are shown.

(1) As shown in Figure 3A, before starting the sewing operation (the lasting machine at this time is in a paused state), the needle bar 21 installed on the needle bar seat 24 is at the starting point, and the sewing thread L is passing through After the thread salad 23 reaches the needle bar 21 through the needle bar seat 24, the thread end of the sewing thread L passes through the pinhole of the needle bar 21 and retains a sufficient length of thread end in the needle bar 21, and the sewing object 70 to be sewn also arrives The intended position of the feeder. At the same time, the thread cutter 40 of the automatic thread cutting device of the present utility model stops at the normal standby position (seeing Fig. 4A).

(2) As shown in Figure 3B, the sewing operation is started, and the needle bar 21 advances from the position of the starting point toward the direction of the sewing object 70 (needle-exiting movement), and at this time, the two salad pieces 231 of the thread-out salad 23 remain loose The state will not clamp the sewing thread L, the needle bar 21 pierces the sewing object 70, and a section of sewing thread L is brought to the outside of the sewing object 70 by the needle bar 21 (in the sewing object 70 shown in FIG. 3B Right).

(3) As shown in FIG. 3C , during the process of retracting the needle bar 21 toward the inner side of the sewing object 70 (needle narrowing movement), the aforementioned section of sewing thread L located on the outer side of the sewing object 70 begins to form a loop L1 , at this time, the crochet needle 21 extends to the outside of the sewing object 70 and hooks the loop L1 (please also refer to FIG. 4B ).

(4) As shown in FIG. 3D , the needle bar 21 performs a narrowing motion and retracts toward the inside of the sewing object 70 to the position of the starting point, and then the crochet needle 22 moves over the top edge of the sewing object 70 to the sewing object 70 At the same time, the crochet needle 22 pulls the hooked loop L1 across the top edge of the sewing object 70, and then enters the inside of the sewing object 70 (the top edge of the sewing object is still pressed by the presser, not shown in the figure shown), at the same time, the feeding mechanism will also drive the sewing object 70 to move (as indicated by the arrow 50 in Figure 3D), and the position of the crochet needle 22 on the inside of the sewing object 70 is slightly lower than that of the needle bar 21. The horizontal position when the needle moves.

(5) As shown in FIG. 3E, the needle bar 21 makes a needle movement again. At this time, the needle bar 21 takes the sewing thread L to pass through the aforementioned loop L1 that reaches the inner side of the sewing object 70 (please also refer to FIG. 4C).

(6) As shown in FIG. 3F , then the needle bar 21 pierces the sewing object 70 , and then the needle bar 21 brings a section of sewing thread L that has passed through the aforementioned loop L1 to the outside of the sewing object 70 .

(7) As shown in FIG. 3G , the needle bar 21 performs a narrowing motion again, as in the action shown in the aforementioned FIG. 3C , a section of sewing thread L positioned outside the sewing object 70 forms a new loop L2 again, and then cyclically By repeating the aforementioned actions in FIGS. 3C-3G , a continuous sewing structure can be formed on the sewing object 70 (see FIG. 5A ).

After the sewing operation is completed, the operator activates the controller 10 to perform thread trimming, such as but not limited to pressing the thread trimming button 11 connected to the controller 10, and the controller 10 will determine the thread trimming mechanism according to the positions of the aforementioned needle bar 21 and hook 22. The thread tangent action is performed at the action time point. One of the implementation methods can install a microswitch (microswitch) on the driving mechanism of the lasting machine. The manual switch generates a thread-cutting signal, and the controller 10 can control the operation of the driver 30 of the thread-cutting mechanism according to the thread-cutting signal, and then complete the thread-cutting action. Please refer to FIG. 5A , at the time point of the thread tangential action, the needle bar 21 has completed the narrowing motion and returned to the starting point, and the crochet needle 22 is pulling the hooked loop L1 from the sewing object 70 and then enter the inside of the sewing object 70 (the same position as the aforementioned Fig. 3D), the driver 30 of the thread cutting mechanism first pushes the thread cutter 40 to protrude obliquely toward the hook line position at an oblique angle (see Fig. 5C), when the thread cutter 40 reaches the thread hook position, the bottom edge of the thread cutter 40 will be pressed on the top of the sewing thread L close to the front end of the needle bar 21 (see Fig. 5A), and then the blade portion 41 of the thread cutter 40 will be Reach below the sewing thread L to be cut off, hook the sewing thread L to be cut off with the hook-shaped blade portion 41, and the sewing thread L to be cut off hooked by the blade portion 41 has already formed the loop A part of the line segment of L1, in other words, the thread cutter 40 is used to cut the sewing thread L constituting the loop L1. Preferably, before executing the cutting of the sewing thread L, the controller 10 controls the thread outlet salad 23 of the lasting machine to clamp the sewing thread L to stop the thread outlet, so that the sewing thread L to be cut can be kept in a tense state , and then, the thread cutter 40 is pulled back to the normal standby position by the driver 30 to cut off the sewing thread L, wherein the cutting point position 60 where the coil L1 is cut off by the thread cutter 40 is at the middle distance from the needle bar 21 of the coil L1 The farther position of the needle point is better (see Fig. 5B-Fig. 5C). After the sewing thread L is cut off, when the operator removes the sewing object 70 from the feeding mechanism of the laster machine, the sewing thread L is cut off before the sewing thread L is cut off. Most of the sewing thread L forming the loop L1 will still remain on the needle bar 21, and a consistent and sufficient length of thread end can be reserved on the needle bar 21, so that the next sewing task can be performed immediately without rethreading.

In fact, the time for the entire thread cutting action from the thread cutter 40 stretched out to the thread hook position and then retracted to the normal standby position is very short, generally no more than 1 second, which is obviously shorter than that of traditionally cutting the sewing thread L by hand. way faster. The utility model can solve the problem that the production capacity is low due to the manual thread trimming of the existing lasting machine. At the same time, after the sewing thread is cut off, a consistent and sufficient thread end can be kept on the needle bar, and the next thread can be carried out immediately without re-threading. Sewing tasks.

Although the utility model has been disclosed above through the above-mentioned embodiments, it is not intended to limit the utility model. Those skilled in the art may make some changes and modifications without departing from the spirit and scope of the utility model. Therefore, the patent protection scope of the present utility model shall be defined by the claims of the present application.

Claims (7)

1. a kind of automatic tangent apparatus of edge-pulling machine, it is characterised in that can cooperate with the sewing mechanism of edge-pulling machine, feed mechanism and Drive mechanism performs tangent line task, and the sewing mechanism is consisted essentially of：Needle bar, crochet hook and outlet salad；The automatic tangent apparatus Including：Tangent mechanism and controller, the tangent mechanism include：Driver and tangential knife, the head end of the tangential knife have blade, should Blade is a kind of hook-shaped blade, and the driver connects the tangential knife, the tangential knife to be promoted by the standby position of normality To hook line position, thread to be cut off is hooked using the blade of the tangential knife, the driver can will hook thread The tangential knife be returned to the standby position, using the blade will keep tense situation thread cut off, the outlet salad by Controller control is to the tension force for maintaining thread and the outlet for controlling thread and stops outlet.

2. the automatic tangent apparatus of edge-pulling machine as claimed in claim 1, it is characterised in that the driver is that one kind can be made back and forth The driver of motion.

3. the automatic tangent apparatus of edge-pulling machine as claimed in claim 2, it is characterised in that the driver includes：Bidirectional gas pressure cylinder, Electromagnetic driver is therein any.

4. the automatic tangent apparatus of edge-pulling machine as claimed in claim 1, it is characterised in that the tail end of the tangential knife has elongated Perforation, the tail end of the tangential knife is installed in tool rest by the connection component through the perforation, and the other end of the tool rest connects the drive Dynamic device.

5. the automatic tangent apparatus of edge-pulling machine as claimed in claim 1, it is characterised in that the tangential knife is arranged on sewing object Inner side, the tangential knife is the lower section for obliquely extending out to thread to be cut off towards the direction of the hook line position with an oblique angle, And thread to be cut off is hooked with the blade.

6. the automatic tangent apparatus of edge-pulling machine as claimed in claim 5, it is characterised in that the sewing to be cut off that the blade is hooked Line is the part line segment of the coil formed in the inner side of sewing object by thread.

7. the automatic tangent apparatus of edge-pulling machine as claimed in claim 6, it is characterised in that the coil is by cutting that the tangential knife is cut off Breakpoint location is in the needle point remote position apart from the needle bar.