TWI763538B - Remaining bobbin thread pull-out device - Google Patents

Abstract

The remaining bobbin thread take out device comprises: a pull-out mechanism and a clamping mechanism. The pull-out mechanism is provided with two rollers, a roller moving member and a roller rotating member. The two rollers are separated each other, so that a space is formed between the two rollers. The clamping mechanism includes a clamper for clamping the bobbin thread and a clamper moving member for moving the clamper through the space, so that the bobbin thread can be moved into the space. Then, the two rollers are moved close to each other by the roller moving member for clamping the bobbin thread, and one of the two rollers is rotated by the roller rotating member for pulling the bobbin thread. Further, the bobbin thread is separated from a bobbin case by rotating the roller without detaching the bobbin case and a bobbin. Therefore, the operation time of present invention for taking out the bobbin thread will be shortened.

Description

Remaining bobbin thread extraction device

The present invention relates to a residual bobbin thread extracting device used in an automatic winding bobbin thread sewing machine, in particular to a residual bobbin thread extracting device that can remove the bobbin thread without separating the bobbin from the bobbin case.

When sewing machines using the lockstitch principle, whether using a full-rotation hook or a half-rotation shuttle, there will be a bobbin for winding the bottom thread, and most sewing machines using the lockstitch principle have a bobbin that can accommodate bobbin case.

However, in order to increase the rotation speed of the sewing machine, the capacity of the bobbin to accommodate the lower thread should not be too large, which will limit the length of the lower thread, so that the bobbin must be replaced frequently to avoid running out of the lower thread, and when changing the lower thread, not only the sewing machine must Stopping the sewing operation, and even the operator has to manually change the bottom thread, is relatively unable to improve the production efficiency of the sewing machine.

In order to overcome the aforementioned deficiencies, there is currently an automatic bobbin changing device in the sewing machine industry. When it is detected that the bobbin thread wound around the bobbin is about to run out, the automatic bobbin changing device will simultaneously remove the bobbin case and the bobbin from the hook. Remove the bobbin case and the bobbin so that both the bobbin case and the bobbin are separated from the rotary hook, and then assemble another set of bobbin case and the bobbin fully wound with the bottom thread in the rotary hook at the same time to achieve the effect of automatic bobbin replacement.

In addition, since the bobbin that is about to run out of bobbin thread will have some bobbin thread remaining, the above-mentioned automatic bobbin changing device needs to remove the bobbin thread remaining on the bobbin first, and then wind the new bobbin thread on the bobbin. The space where the device is usually installed in an automatic sewing machine is quite limited, and the above-mentioned automatic bobbin changing device first separates the bobbin from the bobbin case and then removes the remaining bobbin thread, which will take up a large space for use. When the bobbin is in the shell, the bobbin thread cannot be tightly wound around the bobbin, so that the bobbin thread will appear loose, and it is relatively inconvenient to remove the bobbin thread remaining on the bobbin.

The main purpose of the present invention is to provide a residual bobbin thread extracting device, which does not need to separate the bobbin from the bobbin case first, but can extract the bobbin and wind the bobbin when the bobbin is located inside the bobbin case. the remaining bobbin thread, thus reducing the number of steps required to remove the bobbin thread remaining on the bobbin.

The secondary purpose of the present invention is to improve the structure of the remaining bobbin thread extracting device, so that when the residual bobbin thread extracting device does not remove the bobbin thread remaining on the bobbin, the remaining bobbin thread extracting device can be far away from the bobbin case, so that the bobbin thread winding device can move. The bobbin case and bobbin are used to wind the lower thread around the bobbin.

Another object of the present invention is to improve the structure of the take-out mechanism, so that before the take-out mechanism pulls the bobbin thread away from the bobbin case and the bobbin, the take-out mechanism can securely clamp the bobbin thread, so that the bobbin thread is not easily separated from the take-out mechanism.

In order to achieve the foregoing object, the remaining bobbin thread extracting device of the present invention can extract a bobbin thread from a bobbin case that presents an assembled state and a bobbin inside the above-mentioned bobbin case, and the above-mentioned remaining bobbin thread extracting device is mainly composed of a clamping thread. It consists of a mechanism and a take-out mechanism.

The above-mentioned wire clamping mechanism has a clamp unit and a clamp moving unit, the above-mentioned clamp unit is driven by the above-mentioned clamp moving unit and can move back and forth along a wire-taking path, in addition, the above-mentioned taking-out mechanism has two rollers, a roller opening and closing drive unit and a Rotating the drive unit, a separation space for the wire-taking path to pass through is formed between the above-mentioned two rollers, and the above-mentioned two rollers can open and close the drive unit through the rollers and move away from or approach each other, so that the space size of the above-mentioned separation space can be selectively expanded or reduced , and the above-mentioned rotation driving unit can drive one of the above-mentioned rollers to rotate.

Wherein, the above-mentioned clamp unit moves along the above-mentioned thread-taking path to be close to a bobbin case, so that the above-mentioned clamp unit clamps a bobbin thread outside the above-mentioned bobbin case, and the above-mentioned clamp unit moves along the above-mentioned thread-taking path to Away from the bobbin case, the partial section of the bobbin thread is positioned inside the separation space.

Wherein, the two rollers can be close to each other through the roller opening and closing driving unit, so that the two rollers clamp the bottom thread and present a clamping state, and one of the rollers is driven by the rotating driving unit when the two rollers are in the clamping state. The rotation is performed so that the lower thread located inside the bobbin case can be moved to the outside of the bobbin case.

In this embodiment, the clamp unit includes: a fixed clamp group, an opening and closing drive group, and a movable clamp group, wherein the fixed clamp group has a fixed rod and a fixed clamp connected to the fixed rod, and the above The opening and closing drive group is connected to the above-mentioned clamp moving unit. In addition, the above-mentioned movable clamp group has a movable rod connected to the above-mentioned opening and closing driving group and a movable clamp connected to the above-mentioned movable rod, and the above-mentioned movable rod is movably penetrated through the above-mentioned fixed rod. , and the above-mentioned movable rod can move relatively to the above-mentioned fixed rod through the above-mentioned opening and closing driving group, so that the above-mentioned movable clamp can be selectively approached or separated from the above-mentioned fixed clamp.

In addition, the above-mentioned residual bobbin thread extracting device further has an air blowing mechanism, and the above-mentioned air blowing mechanism can generate an air blowing air flow, and the above-mentioned air blowing air current can flow toward the bobbin thread exposed on the bobbin case and the bobbin thread exposed on the bobbin case. The air flow can be moved between the fixed fixture and the movable fixture through the blowing air.

In this embodiment, the remaining bobbin thread extracting device further has a movable mechanism, the movable mechanism has a movable arm that can change the position and a movable driving unit that can drive the movable arm to change the position, and the movable arm is simultaneously connected to the extraction device. The movable arm can move to an operating position through the movable driving unit, so that the take-out mechanism and the thread clamping mechanism are simultaneously close to the bobbin case.

Wherein, the above-mentioned movable mechanism further has a blocking member connected to the above-mentioned movable arm, and the above-mentioned blocking member can be close to an open end of the above-mentioned bobbin case when the above-mentioned movable arm stays at the above-mentioned operating position, so that a bobbin can continue to be positioned on the above-mentioned bobbin case. Inside the bobbin case, the above-mentioned bobbin case and the bobbin can be maintained in an assembled state in which the above-mentioned bobbin is located inside the above-mentioned bobbin case through the above-mentioned blocking member, however, the above-mentioned movable arm penetrates through one end away from the above-mentioned movable driving unit A through hole is formed, and the clamp unit can move inside the through hole through the clamp moving unit, so that the bobbin thread can enter the interior of the through hole, and the remaining bobbin thread extraction device further has a suction mechanism The suction mechanism can inhale the inside of the through hole to form a suction airflow, so that the bottom thread can enter the inside of the suction mechanism through the suction airflow.

Finally, the two rollers are made of conductive materials, and the take-out mechanism is further provided with a resistance sensor, the resistance sensor is electrically connected to the two rollers, and the resistance sensor can be displayed on the two rollers In the above clamping state, the numerical change of the resistance value is detected.

The feature of the present invention is that after the clamp unit of the thread clamping mechanism clamps and retains the lower thread outside the bobbin case, the clamp moving unit of the thread clamping mechanism can drive the clamp unit to pass through the separation space provided between the two rollers, so that the clamp unit is located outside the bobbin case. The bottom thread can be moved to the inside of the dividing space, and when the partial section of the bottom thread is located inside the dividing space, the roller opening and closing drive unit drives the two rollers to approach each other, so that the two rollers jointly clamp the bottom thread. Next, the rotating drive unit drives the A roller rolls, so that the lower thread can be pulled out and separated from the bobbin case and the bobbin through the rotating roller, so that the remaining lower thread extraction device does not need to perform the step of separating the bobbin from the bobbin case first, but can directly When the bobbin is located inside the bobbin case, the bobbin thread wound around the bobbin can be removed, thereby simplifying the operation steps of removing the bobbin.

In addition, when the movable arm of the movable mechanism is in the operating position, the blocking member of the movable mechanism will be close to the open end of the bobbin case, so that the bobbin can be kept inside the bobbin case, and the remaining bobbin thread extracting device can remove the winding on the bobbin case. During the bobbin threading process, the bobbin can be prevented from being separated from the bobbin case. However, when the remaining bobbin thread extracting device does not remove the bobbin thread remaining in the bobbin, the remaining bobbin thread extracting device can be kept away from the bobbin case, so that the bobbin thread winding device can be removed. Move the bobbin case and bobbin to wind the lower thread on the bobbin.

Furthermore, the two rollers of the take-out mechanism can be made of conductive materials, and the take-out mechanism can electrically connect a resistance sensor between the two rollers. When the two rollers are in a clamped state, the take-out mechanism can be based on the value of the resistance value. It is judged whether the bobbin thread is clamped, and then in the process of pulling the bobbin thread from the bobbin case and the bobbin by the take-out mechanism, the control system can judge when the take-out mechanism has pulled the bobbin thread from the bobbin case and the bobbin through the resistance value.

For the convenience of further understanding and understanding of the structure, use and characteristics of the present invention, a preferred embodiment is given, and the detailed description is as follows in conjunction with the drawings:

Please refer to FIG. 1 , the remaining bobbin thread extracting device 1 of the present invention is applied to a sewing machine 2 . As shown in the figure, the sewing machine 2 has a sewing machine body 20 , a bobbin replacement device 21 and a bobbin thread winding device 22 . The sewing machine body 20 There is a base 201 (the drawing only shows a partial state of the base 201), a lower shaft (not shown in the figure) that can be rotated is installed inside the base 201, and the above-mentioned lower shaft can drive a hook assembled on the base 201 (Fig. (not shown) is rotated, and the bobbin replacement device 21 is located in front of the above-mentioned hook, and the bobbin replacement device 21 can selectively move a bobbin group 3 (as shown in FIG. 2 ) from the above-mentioned hook to the lower thread The winding device 22 is either moved from the lower thread winding device 22 to the above-mentioned hook. In addition, the lower thread winding device 22 can install a lower thread 4 (as shown in FIG. 10A ) on the bobbin set 3 .

Please refer to FIG. 2 , in this embodiment, the bobbin set 3 has a bobbin 30 capable of winding the lower thread 4 (as shown in FIG. 10A ) and a bobbin case 31 that can be assembled to the bobbin 30 . 30 is provided with a spool piece 301 and two limit plates 302, one limit plate 302 is formed at one end of the spool piece 301, and the other limit plate 302 is formed at the other end of the spool piece 301, so that the two limit The plates 302 are spaced apart from each other, and the reel 301 is located between the two limit plates 302, so that the reel 301 and the two limit plates 302 together form a space that can accommodate the bottom line 4 (as shown in FIG. 10A ). ) winding space 303, as shown in the figure, the bobbin case 31 has a shell 311 showing a hollow cylindrical shape, the interior of the shell 311 is provided with a bobbin shaft 312 showing a hollow shape, and the shell 311 A closed end 311a and an open end 311b are respectively formed at opposite ends, and an accommodation space 311c capable of accommodating the bobbin 30 is formed between the inner edge of the housing 311 and the outer edge of the shuttle shaft 312, wherein the housing 311 A wire hole 311d is formed through the accommodating space 311c. As shown in the figure, the casing 311 is recessed from the open end 311b toward the closed end 311a to form a wire groove 311e communicated with the accommodating space 311c, and the casing 311 is at the closed end. 311a is fitted with a latch set 313 that can be connected to the bobbin thread winding device 22, however, the surface of the housing 311 is assembled with a clip that allows the bobbin thread 4 (as shown in FIG. 10A) to be guided from the wire groove 311e to the edge of the wire hole 311d A wire spring (not shown), and the shell 311 extends outward to form a hook arm 314, wherein a guide port (not shown) is provided on one side of the above-mentioned wire clip, and the hook arm 314 extends from the hook arm 314. The outer edge is recessed to form a wire hole 314 a near the end of the hook arm 314 .

Please refer to FIG. 3 and FIG. 4 , the remaining bobbin thread extraction device 1 is mainly composed of a movable mechanism 10 , a take-out mechanism 11 , a thread clamping mechanism 12 , a suction mechanism 13 and an air blowing mechanism 14 , please refer to FIG. 4 and FIG. 5, the movable mechanism 10 has a connecting seat 101, a movable driving unit 102 and a movable arm 103, the connecting seat 101 is connected to the base 201 of the sewing machine body 20, and the movable driving unit 102 is provided with a connecting seat The movable driving source 102a of 101 and a linkage rod 102b connected to the movable arm 103, the movable driving source 102a can generate linear power, so that the movable driving source 102a can drive a movable telescopic rod 102c connected to the linkage rod 102b to move linearly, such as As shown in the figure, a through hole 103a is formed through the end of the movable arm 103 away from the movable driving source 102a, and a blocking member 104 is installed on the movable arm 103 at a position close to the through hole 103a. In this embodiment, the blocking member 104 is provided There is a blocking roller 104a and a supporting rod 104b. The blocking roller 104a is movably assembled to the supporting rod 104b, so that the blocking roller 104a can freely rotate relative to the supporting rod 104b, and the supporting rod 104b is connected to the movable arm 103.

Please refer to FIG. 4 and FIG. 6 , the take-out mechanism 11 is installed on the movable arm 103 of the movable mechanism 10 , and the take-out mechanism 11 has a take-out unit 111 , a rotation drive unit 112 and a roller opening and closing drive unit 113 . The unit 111 has two rollers 111a and a take-out swing arm 111b, and the two rollers 111a and the take-out swing arm 111b are all close to the blocking member 104 of the movable mechanism 10. As shown in the figure, one of the rollers 111a is connected to the rotational drive The unit 112 is set as a driving roller 111a1 that can rotate, and the other roller 111a is connected to the take-out swing arm 111b to be a driven roller 111a2 that can rotate freely, wherein a plurality of teeth are arranged around the driving roller 111a1 part 111a3, so that the driving roller 111a1 can improve the friction force of pulling the lower thread 4 through the plurality of tooth parts 111a3, in addition, the swing arm 111b is pivotally connected to the movable arm 103 of the movable mechanism 10, so that the swing arm 111b can be taken out relative to the movable arm 103 swings, and then the driven roller 111a2 can selectively approach or move away from the driving roller 111a1 through the swinging take-out swing arm 111b. The driving roller 111a1 forms a separation space S between the driven roller 111a2 and the driving roller 111a1 (as shown in FIG. 10F ). In this embodiment, the surface of the driven roller 111a2 can be made of a rubber material with a high friction coefficient The outer circumference of the driven roller 111a2 is also provided with a plurality of teeth 111a3 like the driving roller 111a1 to improve the frictional force for pulling the lower thread 4. In addition, please refer to FIG. 7, in another embodiment, The driving roller 111a1, the driven roller 111a2 and the take-out swing arm 111b are all made of conductive materials, and the take-out unit 111, the take-out swing arm 111b and the rotational drive unit 112 are electrically connected to a resistance sensor 114, so that the resistance The sensor 114 can be electrically connected to the driving roller 111a1 and the driven roller 111a2, and the resistance sensor 114 can be used to detect whether the driving roller 111a1 and the driven roller 111a2 are in contact.

As shown in the figure, the rotational drive unit 112 of the take-out mechanism 11 has a speed reducer 112a and a rotational drive source 112b mounted on the speed reducer 112a, the speed reducer 112a is connected to the movable arm 103 of the movable mechanism 10, and the speed reducer 112a is The output rod is connected to the driving roller 111a1 of the take-out unit 111, and the rotational driving source 112b can generate rotational power to drive the driving roller 111a1 to rotate through the reducer 112a. In addition, the roller opening and closing driving unit 113 has a roller opening and closing connected to the movable arm 103 The driving source 113a and a roller interlocking rod 113b connected to the take-out swing arm 111b, the roller opening and closing driving source 113a can generate linear power, and the roller opening and closing driving source 113a can drive a roller telescopic rod 113c connected to the roller interlocking rod 113b to move in a straight line Moving, the roller opening and closing drive source 113a can drive the take-out swing arm 111b to swing through the roller telescopic rod 113c and the roller linkage rod 113b together.

Please refer to FIG. 4 and FIG. 8 , the wire clamping mechanism 12 is installed on the movable arm 103 of the movable mechanism 10 , and the wire clamping mechanism 12 has a clamp moving unit 121 and a clamp unit 122 , and the clamp moving unit 121 has a The clip driving source 121a of the movable arm 103 and a loading platform 121b connected to the clip unit 122, and the clip driving source 121a can generate linear power, so that the clip driving source 121a can drive a clip telescopic rod 121c connected to the riding platform 121b The movement is performed so that the clamp unit 122 can move relative to the movable arm 103 .

The clamp unit 122 of the wire clamping mechanism 12 is disposed inside the through hole 103a of the movable arm 103, and the clamp unit 122 is mainly composed of a fixed clamp group 122a, a movable clamp group 122b and an opening and closing driving group 122c, wherein the fixed clamp The clip group 122a has a fixing rod 122a1 which can be inserted through the through hole 103a, the fixing rod 122a1 is hollow, and one end of the fixing rod 122a1 is fixedly connected to the riding platform 121b of the clamp moving unit 121, and the fixing rod 122a1 A fixed clamp 122a2 is connected to one end away from the loading platform 121b, and the movable clamp group 122b has a movable rod 122b1 connected to the opening and closing driving group 122c and a movable clamp 122b2 connected to the movable rod 122b1. In this embodiment, The movable rod 122b1 is movably penetrated through the fixed rod 122a1, so that the movable rod 122b1 can rotate relative to the fixed rod 122a1, so that the movable clamp 122b2 can be selectively approached or away from the fixed clamp 122a2. In addition, the opening and closing driving group 122c has a line capable of generating a straight line. The moving opening and closing driving source 122c1 and an opening and closing linkage rod 122c2 connected to the movable rod 122b1, and the opening and closing driving source 122c1 can drive an opening and closing telescopic rod 122c3 connected to the opening and closing linkage rod 122c2 to move linearly, so that the movable rod 122b1 is rotatable relative to the fixed rod 122a1.

Please refer to FIG. 4 and FIG. 9 , the suction mechanism 13 has a suction pipe 131 and a suction unit 132 , the suction pipe 131 is installed on the movable arm 103 of the movable mechanism 10 , and the suction pipe 131 communicates with the movable arm 103 . The through hole 103a of the arm 103, and the suction unit 132 is connected to the suction pipe 131, and the suction unit 132 can inhale the inside of the through hole 103a, so that the air located inside the through hole 103a can flow into the suction The inside of the pipe 131 forms a suction airflow A1 (as shown in FIG. 10I ). In addition, the blowing mechanism 14 has a blowing pipe 141 connected to the movable arm 103 and a blowing unit 142 connected to the blowing pipe 141. The blowing pipe 141 is provided with a blowing port 141a close to the take-out unit 111 at one end away from the blowing unit 142, and the blowing port 141a faces the main and driven rollers 111a1 and 111a2 of the taking-out unit 111, and the blowing unit 142 can generate a flow to The blowing airflow A2 inside the blowing pipe 141 (as shown in FIG. 10D ), wherein the blowing airflow A2 can flow to the main and driven rollers 111a1 and 111a2 through the blowing port 141a.

Please refer to FIGS. 10A and 10B , when the remaining bobbin thread extracting device 1 is specifically used, the bobbin replacement device 21 of the sewing machine 2 removes the bobbin set 3 with the remaining bobbin thread 4 installed from the above-mentioned hook of the sewing machine body 20 , Move the bobbin set 3 to the bobbin thread winding device 22 of the sewing machine 2. At this time, a partial section of the bobbin thread 4 is wound on the bobbin 301 of the bobbin 30 to set a position inside the winding space 303. The lower thread 40 and the rest of the lower thread 4 are located outside the accommodating space 311c of the bobbin case 31 to form an outer lower thread 41, and the outer lower thread 41 passes through the thread hole 314a of the hook arm 314 to expose a length. 3. When the bobbin case 31 is connected to the lower thread winding device 22 through the latch group 313, the movable driving source 102a of the movable mechanism 10 drives the movable telescopic rod 102c of the movable driving unit 102 to extend outward, so that the movable telescopic rod 102c is driven by the movable The linkage rod 102b of the unit 102 drives the movable arm 103 of the movable mechanism 10 to swing toward the bobbin set 3, so that both the take-out mechanism 11 and the thread clamping mechanism 12 are also close to the bobbin set 3 through the swinging movable arm 103, Wherein, when the movable telescopic rod 102c is extended to the limit position, the movable arm 103 will be located at an operating position P1 (as shown in FIG. 10K ), so that the blocking roller 104a of the blocking member 104 is close to the open end 311b of the bobbin case 31, and then the next , the replacement of the bobbin device 21 will release the bobbin set 3. At this time, the blocking member 104 can prevent the bobbin 30 from being separated from the bobbin case 31, so that the bobbin case 31 and the bobbin 30 can be held in a bobbin 30 position through the blocking member 104. In the assembled state C1 inside the accommodating space 311c and when both the bobbin case 31 and the bobbin 30 are in the assembled state C1, the direction of the air blowing port 141a of the air blow pipe 141 will face the hook arm 314 of the bobbin case 31 .

Referring to FIG. 10C , when the movable arm 103 of the movable mechanism 10 is positioned at the operating position P1, the clamp driving source 121a of the thread clamping mechanism 12 drives the clamp telescopic rod 121c of the clamp moving unit 121 to contract inwardly, so that the Both the fixed clamp 122a2 and the movable clamp 122b2 of the clamp unit 122 simultaneously move along a wire taking path L passing through the interior of the partition space S to move out of the interior of the through hole 103a, so that both the fixed clamp 122a2 and the movable clamp 122b2 face the take-out mechanism The removal unit 111 of 11 moves, and then the fixed clamp 122a2 and the movable clamp 122b2 will pass through the separation space S located between the driving roller 111a1 and the driven roller 111a2, wherein when the clamp telescopic rod 121c retracts inward to the limit position, Both the fixed clamp 122a2 and the movable clamp 122b2 are close to the hook arm 314 of the bobbin case 31 .

10D and FIG. 10E, next, in order to prevent the uncertainty of the position of the outer bottom thread 41 exposed in the thread hole 314a in the natural state, the blowing unit 142 of the blowing mechanism 14 generates the blowing airflow A2 , and the blowing airflow A2 is sprayed from the blowing port 141a of the blowing pipe 141 along the blowing pipe 141 of the blowing mechanism 14, so that the blowing airflow A2 flows to the thread hole 314a of the hook arm 314, which can ensure that the outer bottom thread 41 passes through the blowing airflow A2 will move to the clamping range between the fixed clamp 122a2 of the clamp unit 122 and the movable clamp 122b2 of the clamp unit 122. When the outer bottom thread 41 is located between the fixed clamp 122a2 and the movable clamp 122b2, the clamp unit 122 The opening and closing driving source 122c1 will drive the opening and closing telescopic rod 122c3 of the opening and closing driving group 122c to extend outward, so that the movable rod 122b1 of the movable clamp group 122b can move relative to the fixed clamp group 122a through the moving opening and closing telescopic rod 122c3. The fixed rod 122a1 rotates, so that the movable clamp 122b2 of the movable clamp group 122b can approach the fixed clamp 122a2 of the fixed clamp group 122a, so that both the movable clamp 122b2 and the fixed clamp 122a2 jointly clamp the outer bottom thread 41.

Referring to FIG. 10F , when the outer bottom thread 41 is clamped by the fixed clamp 122a2 and the movable clamp 122b2, the clamp driving source 121a of the thread clamping mechanism 12 drives the clamp telescopic rod 121c of the clamp moving unit 121 to extend outward, so that the clamp The clamp unit 122 of the thread mechanism 12 clamps the outer lower thread 41 and moves along the thread taking path L, so that the outer lower thread 41 can pass through the separation space S located between the driving roller 111a1 and the driven roller 111a2, allowing the outer lower thread 41 to pass through. The partial section of 121c is located inside the separation space S, wherein the clamp telescopic rod 121c continues to extend outward through the clamp drive source 121a, so that both the fixed clamp 122a2 and the movable clamp 122b2 can move into the through hole 103a of the movable arm 103. , and when both the fixed clamp 122a2 and the movable clamp 122b2 are located inside the through hole 103a, the outer thread 41 will be pulled out from the bobbin case 32 for a length and located inside the through hole 103a.

Referring to FIG. 10G , when a partial section of the outer bottom thread 41 is located inside the separation space S, the roller opening and closing drive source 113a of the roller opening and closing drive unit 113 drives the roller telescopic rod 113c to extend outward, so that the roller telescopic rod 113c passes through the roller The roller linkage rod 113b of the drive unit 113 is opened and closed to drive the take-out swing arm 111b of the take-out unit 111 to swing, and then the driven roller 111a2 of the take-out unit 111 gradually approaches the drive roller 111a1 of the take-out unit 111 to reduce the separation space S, allowing the active roller 111a1 and the driven roller 111a2 both clamp the outer lower thread 41 together to present a clamped state C2, wherein when the driving roller 111a1 and the driven roller 111a2 both clamp the outer lower thread 41 together, the driving roller 111a1 and the driven roller 111a2 Since there is no direct contact with the bottom thread 4 between them, the resistance sensor 114 will detect a higher resistance to form a first resistance value to indicate that the driving roller 111a1 and the driven roller 111a2 are firmly clamped to the external bottom thread 41 .

10H and FIG. 10I, when the outer thread 41 is clamped by the driving roller 111a1 and the driven roller 111a2, the opening and closing driving source 122c1 drives the opening and closing telescopic rod 122c3 to contract inwardly so that the opening and closing linkage rod 122c2 rotates , so that the movable clamp group 122b rotates relative to the fixed clamp group 122a, so that the movable clamp 122b2 is separated from the fixed clamp 122a2, so that the clamp unit 122 releases the external lower thread 41, and then, the rotating drive unit 112 rotates the drive unit 112 through the reducer 112a of the drive unit 112. The driving roller 111a1 is driven to rotate, and the rotating driving roller 111a1 can simultaneously drive the driven roller 111a2 to continuously pull the inner thread 40 into the through hole 103a of the movable arm 103, so that the inner thread 40 is separated from the bobbin 30 and the bobbin case. 31, and then the entire lower thread 4 will be pulled out of the accommodating space 311c of the bobbin case 31. During the process of the bobbin thread being pulled out of the accommodating space 311c, the bobbin 30 will rotate in the bobbin case 31, and the rotating bobbin 30 will contact to the blocking roller 104a of the blocking member 104, so that the blocking roller 104a will rotate due to the contact with the bobbin 30, and then the blocking roller 104a can avoid the formation of resistance hindering the rotation of the bobbin 30 (as shown in FIG. 10B), and at the same time, inhale The suction unit 132 of the mechanism 13 will generate the suction airflow A1, and the entire bottom thread 4 will be guided to the inside of the suction pipe 131 through the suction airflow A1, so that the bottom thread 4 can be moved to the inside of the suction unit 132. In a preferred implementation In an example, a control system (not shown in the figure) of the sewing machine 2 can set both the rotary drive unit 112 and the suction mechanism 13 to operate for a preset operation time, so that the lower thread 4 can be separated from the bobbin set 3. Please refer to FIG. As shown in 10J, in another embodiment, because the movable mechanism 10, the take-out mechanism 11 and the wire clamping mechanism 12 are usually made of metal materials, in order to isolate other conductive paths between the two rollers 111a, the take-out unit 111 A bushing 114a made of an insulating material is provided between the movable arm 103 and the take-out swing arm 111b and between the roller linkage rod 113b and the take-out swing arm 111b, so as to prevent the two connection lines of the resistance sensor 114 from being in two directions. The conduction state occurs when the rollers 111a are not in contact. When the entire lower thread 4 passes through the extraction unit 111 without being clamped by the driving rollers 111a1 and the driven rollers 111a2, the driving rollers 111a1 will directly contact the driven rollers 111a2, so that the resistance sensing The sensor 114 will detect the second resistance value whose value is smaller than the first resistance value. When the control system of the sewing machine 2 receives the second resistance value formed by the resistance sensor 114, the rotation driving unit 112 will stop rotating, and then , the air intake mechanism 13 also stops.

Referring to FIG. 10K, after the inner thread 40 is pulled away from the bobbin case 31 and the bobbin 30, the movable driving source 102a of the movable mechanism 10 drives the movable telescopic rod 102c of the movable driving unit 102 to shorten inwardly, so that the movable telescopic rod 102c is shortened inwardly. The movable arm 103 of the movable mechanism 10 is driven to swing from the operating position P1 to a standby position P2 (as shown in FIG. 10A ) through the linkage rod 102 b of the movable driving unit 102 , and then the take-out mechanism 11 and the thread clamping mechanism 12 are both oscillated by At the same time, the movable arm 103 of the bobbin set 3 will move away from the bobbin set 3, and then start to prepare to start the bobbin thread winding device 22, whereby the remaining bobbin thread extracting device 1 will wait to clear the next bobbin set 3.

The above-mentioned embodiments are only for the convenience of illustrating the present invention and are not intended to limit it. Without departing from the scope of the present invention, various simple deformations and modifications made by those skilled in the industry according to the scope of the patent application of the present invention and the description of the invention should still include: In the scope of the following patent applications.

1: Remaining bobbin thread extraction device 10: Activity agencies 101: Connector 102: Active drive unit 102a: Active Drive Source 102b: Link rod 102c: Active telescopic rod 103: Active Arm 103a: Through hole 104: Stopper 104a: Blocking rollers 104b: Support rod 11: Take out the mechanism 111: Take out unit 111a: Roller 111a1: Active Roller 111a2: driven roller 111a3: Teeth 111b: Take out the swing arm 112: Rotate the drive unit 112a: Reducer 112b: Rotary drive source 113: Roller opening and closing drive unit 113a: Roller opening and closing drive source 113b: Roller linkage rod 113c: Roller telescopic rod 114: Resistance sensor 114a: Bushing 12: Wire clamping mechanism 121: Fixture moving unit 121a: Fixture drive source 121b: Ride platform 121c: Clamp telescopic rod 122: Fixture unit 122a: Fixing clip set 122a1: Fixed rod 122a2: Fixing fixture 122b: Active clip set 122b1: Active rod 122b2: Active Fixtures 122c: Opening and closing drive group 122c1: Opening and closing drive source 122c2: Opening and closing linkage rod 122c3: Opening and closing telescopic rod 13: Inhalation mechanism 131: suction pipe 132: Suction unit 14: Air blowing mechanism 141: Blow pipe 141a: Blow port 142: Blow unit 2: Sewing machine 20: Sewing machine body 201: Base 21: Replace the bobbin device 22: Bottom thread winding device 3: Bobbin set 30: Bobbin 301: Reel parts 302: Limit board 303: Winding Space 32: Bobbin case 311: Shell 311a: closed end 311b: open end 311c: accommodating space 311d: Conductor hole 311e: Conductor trench 312: Shuttle shaft 313: Latch Group 314: hook arm 314a: wire hole 4: Bottom Line 40: Inside Bottom Line 41: External Bottom Line A1: Attract airflow A2: Blow air flow C1: Assembly state C2: Clamped state L: take the line path S: Separation space P1: Operational position P2: Standby position

Fig. 1 is the schematic diagram that the residual bobbin thread extracting device of the present invention is applied to the sewing machine; Fig. 2 is an exploded view of the bobbin set; 3 is a perspective view of the remaining bottom thread extracting device of the present invention; 4 is an exploded view of the remaining bottom thread extracting device of the present invention; Fig. 5 is an exploded view of the movable mechanism in Fig. 4; Figure 6 is an exploded view of the take-out mechanism in Figure 4; 7 is a schematic diagram of a resistance sensor being electrically connected to a driving roller and a driven roller; Figure 8 is an exploded view of the wire clamping mechanism in Figure 4; 9 is a schematic diagram of the suction mechanism and the blowing mechanism being installed on the movable arm; 10A is a schematic diagram of the movable arm swinging to be close to the bobbin set; 10B is a schematic view of the blocking member approaching the bobbin case; 10C is a schematic diagram of both the fixed clamp and the movable clamp close to the bobbin case; 10D is a schematic diagram of the blowing mechanism blowing the bottom thread between the fixed fixture and the movable fixture; Figure 10E is a schematic diagram of the bottom line of the fixed clamp and the movable clamp; Figure 10F is a schematic diagram of the bottom line positioned inside the separation space; FIG. 10G is a schematic diagram of the bottom thread being jointly clamped by the active roller and the driven roller; Figure 10H is a schematic diagram of the active roller rolling; Fig. 10I is the schematic diagram that the suction mechanism sucks the bottom thread; Figure 10J is a schematic diagram of the driving roller directly contacting the driven roller; and FIG. 10K is a schematic diagram of the movable arm swinging away from the bobbin set.

1: Remaining bobbin thread extraction device

10: Activity agencies

101: Connector

102: Active drive unit

102a: Active Drive Source

102b: Link rod

102c: Active telescopic rod

103: Active Arm

103a: Through hole

104: Stopper

11: Take out the mechanism

111a: Roller

111a1: Active Roller

111a3: Teeth

112: Rotate the drive unit

112a: Reducer

112b: Rotary drive source

113: Roller opening and closing drive unit

113a: Roller opening and closing drive source

113b: Roller linkage rod

12: Wire clamping mechanism

121: Fixture moving unit

121a: Fixture drive source

121b: Ride platform

122: Fixture unit

122a1: Fixed rod

122a2: Fixing fixture

122b2: Active Fixtures

122c1: Opening and closing drive source

122c2: Opening and closing linkage rod

122c3: Opening and closing telescopic rod

13: Inhalation mechanism

14: Air blowing mechanism

Claims (8)

A residual bobbin thread extraction device comprising: a wire clamping mechanism, comprising a clamp unit and a clamp moving unit, and the clamp unit is driven by the clamp moving unit to move back and forth along a wire-taking path; A take-out mechanism, which has two rollers, a roller opening and closing drive unit and a rotation drive unit, a separation space for the thread take-out path is formed between the two rollers, and the two rollers can be separated from each other through the roller opening and closing drive unit or approaching, so that the space size of the separation space can be selectively enlarged or reduced, and the rotation driving unit can drive one of the rollers to rotate; Wherein, the above-mentioned clamp unit moves along the above-mentioned thread-taking path to be close to a bobbin case, so that the above-mentioned clamp unit clamps a bobbin thread outside the above-mentioned bobbin case, and the above-mentioned clamp unit moves along the above-mentioned thread-taking path to away from the above-mentioned bobbin case, so that the partial section of the above-mentioned bobbin thread is located inside the above-mentioned separation space; Wherein, the two rollers can be close to each other through the roller opening and closing driving unit, so that the two rollers clamp the bottom thread and present a clamping state, and one of the rollers is driven by the rotating driving unit when the two rollers are in the clamping state. The rotation is performed so that the lower thread located inside the bobbin case can be moved to the outside of the bobbin case. The device for extracting the remaining bottom thread according to claim 1, wherein the clamp unit includes: a fixing clip group, which has a fixing rod and a fixing clamp connected to the fixing rod; an opening and closing drive group, connected to the above-mentioned clamp moving unit; A movable clamp group has a movable rod connected to the opening and closing drive group and a movable clamp connected to the movable rod, the movable rod is movably penetrated through the fixed rod, and the movable rod can pass through the opening and closing driving group. Relatively moving relative to the above-mentioned fixed rod, the above-mentioned movable clamp can be selectively approached or moved away from the above-mentioned fixed clamp. The remaining bobbin thread extracting device according to claim 2, wherein the remaining bobbin thread extracting device further has an air blowing mechanism, the air blowing mechanism can generate an air blowing airflow, and the air blowing airflow can be directed toward the bobbin thread exposed on the bobbin case. The bobbin thread exposed on the bobbin case can move between the fixed clamp and the movable clamp through the blowing airflow. The device for pulling out the remaining bobbin thread according to claim 1, wherein the device for pulling out the remaining bobbin thread further has a movable mechanism, and the movable mechanism has a movable arm capable of changing the position and a movable driving unit capable of driving the movable arm to change the position. The movable arm is connected to the take-out mechanism and the thread clamping mechanism at the same time, and the movable arm can be moved to an operating position through the movable driving unit, so that the take-out mechanism and the thread clamping mechanism are simultaneously close to the bobbin case. The device for pulling out the remaining bobbin thread according to claim 4, wherein the movable mechanism further has a blocking member connected to the movable arm, and the blocking member can approach an opening of the bobbin case when the movable arm stays at the operating position end, so that a bobbin can be continuously positioned inside the bobbin case, so that both the bobbin case and the bobbin can maintain an assembled state in which the bobbin is positioned inside the bobbin case through the blocking member. The remaining bobbin thread extracting device according to claim 4, wherein a through hole is formed through the movable arm at one end away from the movable driving unit, and the clamp unit can move inside the through hole through the clamp moving unit, so that The bottom line can enter into the inside of the through hole. The remaining bobbin thread extracting device according to claim 6, wherein the remaining bobbin thread extracting device further has an air suction mechanism, and the air suction mechanism can inhale the inside of the through hole to form a suction airflow, so that the bobbin thread can pass through the The airflow can be sucked into the inside of the air intake mechanism. The remaining bobbin thread extracting device according to claim 1, wherein the two rollers are made of conductive material, and the extracting mechanism is further provided with a resistance sensor, the resistance sensor is electrically connected to the two rollers, and The resistance sensor can detect the numerical change of the resistance value when the two rollers are in the clamping state.

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