A sewing device capable of feeding in multiple directions

Abstract

The invention discloses a sewing device capable of feeding in multiple directions, and relates to the technical field of fabric processing. The sewing device capable of feeding in multiple directions comprises an upper thread needle, a lower thread needle, a lower thread hook needle and a lower thread looping mechanism. The upper thread needle is arranged vertically, the lower thread needle is arranged at the lower side of the upper thread needle, the lower thread needle is connected to a needle driving mechanism for driving it to swing back and forth or translate, the lower thread hook needle is arranged at one side of the lower thread needle, the lower thread hook needle is used to hook the lower thread when the upper thread on the upper thread needle crosses the lower thread on the lower thread needle, and the lower thread looping mechanism is arranged at one side of the lower thread hook needle. The lower thread hook needle is used to hook the lower thread when the upper thread on the upper thread needle crosses the lower thread on the lower thread needle, and the upper thread needle drives the upper thread to move upward to initially complete the knotting, and then the lower thread looping mechanism loops the current lower thread on the lower thread hook needle onto the lower thread hooked by the lower thread hook needle next time, and finally completes the knotting, and the knotting of the lower thread and the upper thread does not depend on the cloth conveying direction, and the cloth can be fed in multiple directions.

Description

Technical Field

[0001] The invention relates to the technical field of fabric processing, and in particular to a sewing device capable of feeding materials in multiple directions. Background Art

[0002] Sewing machines and embroidery machines are essential equipment for processing clothing fabrics, bedding and various curtain fabrics. These machines require both upper and lower threads to complete sewing. The upper thread refers to the thread above the fabric, which is inserted through the hole at the lower end of the needle, while the lower thread refers to the thread placed under the fabric. The upper and lower threads need to be tied at the bottom of the fabric to complete sewing.

[0003] The fabric feeding direction of the existing sewing machine is fixed. If the fabric feeding direction is changed, the bottom thread cannot be knotted with the surface thread, and continuous sewing cannot be achieved. Summary of the invention

[0004] To this end, the present invention provides a sewing device capable of feeding materials in multiple directions, so as to solve the problem in the prior art that fabrics can only be fed in a single direction.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The sewing device capable of multi-directional feeding comprises an upper thread needle, a lower thread shifting needle, a lower thread hook needle and a lower thread looping mechanism. The upper thread needle is arranged vertically, the lower thread shifting needle is arranged at the lower side of the upper thread needle, the lower thread shifting needle is connected to a needle shifting driving mechanism for driving it to swing back and forth or translate, the lower thread hook needle is arranged at one side of the lower thread shifting needle, the lower thread hook needle is used to hook the lower thread when the upper thread on the upper thread needle and the lower thread on the lower thread shifting needle cross, the lower thread looping mechanism is arranged at one side of the lower thread hook needle, the lower thread looping mechanism is used to loop the current lower thread on the lower thread hook needle onto the lower thread hooked by the lower thread hook needle next time.

[0007] Furthermore, the needle shifting drive mechanism includes a needle shifting drive shaft, an eccentric bearing and a connecting rod mechanism. The bottom line needle is fixed on the needle shifting drive shaft through a needle shifting bracket. The eccentric bearing is connected to a shaft that drives its eccentric rotation. The eccentric bearing is connected to the needle shifting drive shaft through a connecting rod mechanism.

[0008] Furthermore, the connecting rod mechanism includes a first swinging link and a second swinging link, one end of the first swinging link is connected to the outer ring of the eccentric bearing, the other end of the first swinging link is rotatably connected to one end of the second swinging link, and the other end of the second swinging link is rotatably connected to the needle driving shaft.

[0009] Furthermore, the bottom thread hook is connected to a hook driving mechanism for driving the bottom thread hook to move reciprocatingly and laterally, and the direction of the reciprocating and laterally moving bottom thread hook is perpendicular to the swinging direction of the bottom thread shifting needle.

[0010] Furthermore, the crochet hook driving mechanism includes a crochet hook driving gear, a crochet hook driving connecting rod and a crochet hook driving shaft. The two ends of the crochet hook driving connecting rod are respectively rotatably connected to the crochet hook driving gear and the crochet hook driving shaft. The crochet hook driving shaft is arranged to slide back and forth horizontally, and the bottom line crochet hook is fixedly connected to the crochet hook driving shaft through a crochet hook bracket.

[0011] Furthermore, the end of the bottom thread crochet needle is provided with a hooking needle body, the hooking needle body is arranged horizontally, and the hooking needle body is bent in a direction away from the bottom thread needle;

[0012] The bottom line threading mechanism comprises a bottom line stopper rod, which is connected to a stopper rod driving mechanism for driving the bottom line stopper rod to move back and forth or to swing. A bottom line barb is arranged on the side of the bottom line hook needle away from the bottom line shifting needle.

[0013] Furthermore, the bottom line barb is rotatably connected to the bottom line hook, and the bottom line stopper is arranged on the upper side of the bottom line hook.

[0014] Furthermore, the baffle rod driving mechanism includes a baffle rod driving shaft, a cam and a spring. The baffle rod driving shaft is rotatably arranged, the bottom line baffle rod is horizontally arranged on a baffle rod bracket, the baffle rod bracket is horizontally slidably arranged, the cam is fixed on the baffle rod driving shaft and cooperates with the baffle rod bracket, and the spring pulls the baffle rod bracket to move toward the side close to the bottom line hook needle.

[0015] Furthermore, the blocking rod bracket is fixed on a sliding block, the sliding block is slidably arranged on a horizontal guide rail, and the spring is connected to the slide.

[0016] Furthermore, the bottom thread moving needle, bottom thread hook needle and bottom thread sleeve mechanism are fixed in a box, an upper thread plate is fixed on the upper side of the box, and the upper thread needle passes through the needle hole on the upper thread plate and is inserted into the box.

[0017] The present invention has the following advantages:

[0018] The present invention utilizes the bottom thread hook hook to hook the bottom thread when the upper thread on the upper thread needle crosses the bottom thread on the bottom thread moving needle, and the upper thread needle drives the upper thread to move upward to initially complete the knotting, and then the bottom thread sleeve mechanism sleeves the current bottom thread on the bottom thread hook hook onto the bottom thread hooked by the bottom thread hook hook next time, and finally completes the knotting. The knotting of the bottom thread and the upper thread does not depend on the fabric conveying direction, and the fabric can be fed in multiple directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 A schematic diagram of a sewing device capable of feeding in multiple directions provided by an embodiment of the present invention;

[0022] Figure 2 It is a three-dimensional diagram of the internal structure of the box body of the embodiment of the present invention from the right front side angle;

[0023] Figure 3 A three-dimensional diagram of the internal structure of the box body of the embodiment of the present invention from the left front side;

[0024] Figure 4 A three-dimensional diagram of the internal structure of the box body of the embodiment of the present invention from the left rear angle;

[0025] Figure 5 This is a schematic diagram of the bottom line crochet hook;

[0026] Figure 6 to Figure 13 A schematic diagram of a process of tying a knot between the lower thread and the upper thread according to an embodiment of the present invention;

[0027] In the figure: 1-box body 2-face thread plate 3-face thread needle 4-main transmission shaft 5-driven shaft 6-first bevel gear 7-second bevel gear 8-driving gear 9-hook needle drive gear 10-bottom line hook needle 11-hook needle bracket 12-hook thread needle body 13-bottom line barb 14-bottom line shifting needle 15-bottom line baffle rod 16-baffle rod bracket 17-slider 18-guide rail 19-needle shifting bracket 20-needle shifting drive shaft 21-hook needle drive shaft 22-eccentric bearing 23-first swing connecting rod 24-second swing connecting rod 25-hook needle drive connecting rod 26-baffle rod drive shaft 27-cam. DETAILED DESCRIPTION

[0028] The following is an explanation of the implementation mode of the present invention by specific specific examples. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantial changes in the technical content.

[0029] See also Figures 1 to 4 The sewing device capable of multi-directional feeding comprises an upper thread needle 3, a lower thread shifting needle 14, a lower thread hook needle 10 and a lower thread looping mechanism, the upper thread needle 3 is arranged vertically, the lower thread shifting needle 14 is arranged at the lower side of the upper thread needle 3, the lower thread shifting needle 14 is connected to a needle shifting driving mechanism for driving it to swing back and forth or translate, the lower thread hook needle 10 is arranged at one side of the lower thread shifting needle 14, the lower thread hook needle 10 is used to hook the lower thread when the upper thread on the upper thread needle 3 crosses the lower thread on the lower thread shifting needle 14, the lower thread looping mechanism is arranged at one side of the lower thread hook needle 10, and the lower thread looping mechanism is used to loop the current lower thread on the lower thread hook needle 10 onto the lower thread hooked by the lower thread hook needle 10 next time.

[0030] The lower thread setting needle 14, the lower thread hook needle 10 and the lower thread threading mechanism are fixed in a box body 1, and the upper thread plate 2 is fixed on the upper side of the box body 1. The upper thread needle 3 passes through the needle hole on the upper thread plate 2 and is inserted into the box body 1. The box body 1 is provided with a main transmission shaft 4 and a driven shaft 5. The main transmission shaft 4 is provided with a driving gear 8 and a first bevel gear 6. The driven shaft 5 is provided with a second bevel gear 7 meshing with the first bevel gear 6 and a hook drive gear 9 meshing with the driving gear 8.

[0031] The bottom thread hook 10 is connected to a hook drive mechanism that drives it to move back and forth horizontally, and the direction of the reciprocating horizontal movement of the bottom thread hook 10 is perpendicular to the swing direction of the bottom thread setting needle 14. The bottom thread hook 10 can hook the bottom thread on the bottom thread setting needle 14 by reciprocating movement, and will not affect the reciprocating swing of the bottom thread setting needle 14. After the bottom thread hook 10 hooks the bottom thread on the bottom thread setting needle 14, the upper thread needle 3 moves upward, so that the upper thread goes around the bottom thread on the bottom thread hook 10 to complete the preliminary knotting.

[0032] The hook drive mechanism includes a hook drive gear 9, a hook drive connecting rod 25 and a hook drive shaft 21. The two ends of the hook drive connecting rod 25 are respectively rotatably connected to the hook drive gear 9 and the hook drive shaft 21. The hook drive shaft 21 is arranged to slide back and forth horizontally, and the bottom hook 10 is fixedly connected to the hook drive shaft 21 through the hook bracket 11. After the hook drive gear 9 rotates, the hook drive shaft 21 is driven to move back and forth horizontally through the hook drive connecting rod 25, and the hook drive shaft 21 drives the bottom hook 10 to move back and forth.

[0033] The end of the bottom line hook needle 10 is provided with a hook needle body 12, which is horizontally arranged and bent in a direction away from the bottom line needle 14; the bottom line threading mechanism includes a bottom line stopper 15, and the bottom line stopper 15 is connected to a stopper driving mechanism that drives it to move back and forth or swing, and a bottom line barb 13 is provided on the side of the bottom line hook needle 10 away from the bottom line needle 14. The bottom line stopper 15 is used to push the bottom line in the hook needle body 12 into the bottom line barb 13 when the bottom line hook needle 10 moves forward, and to pull the bottom line in the bottom line barb 13 out of the bottom line barb 13 and make it sleeved on the outside of the bottom line on the hook needle body 12 when the bottom line hook needle 10 moves backward, so as to complete the cyclic knotting of the bottom lines. The movement of the bottom line hook needle 10 in the direction close to the bottom line needle 14 is called forward movement, and the opposite is backward movement.

[0034] The blocking rod driving mechanism includes a blocking rod driving shaft 26, a cam 27 and a spring (not shown in the figure), the blocking rod driving shaft 26 is fixedly connected to the second bevel gear 7, the main transmission shaft 4 drives the blocking rod driving shaft 26 to rotate through the bevel gear, the bottom line blocking rod 15 is horizontally arranged on a blocking rod bracket 16, the blocking rod bracket 16 is fixed on a slider 17, the slider 17 is slidably arranged on a horizontal guide rail 18, and the spring is slidably connected. The cam 27 is fixed on the blocking rod driving shaft 26 and cooperates with the blocking rod bracket 16, and the spring pulls the slider 17 and the blocking rod bracket 16 to move to the side close to the bottom line hook needle 10.

[0035] The needle-shifting drive mechanism includes a needle-shifting drive shaft 20, an eccentric bearing 22, and a connecting rod mechanism. The bottom line needle 14 is fixed to the needle-shifting drive shaft 20 through the needle-shifting bracket 19. The eccentric bearing 22 is connected to the blocking rod driving shaft 26. The eccentric bearing 22 is connected to the needle-shifting drive shaft 20 through the connecting rod mechanism. The connecting rod mechanism includes a first swinging link 23 and a second swinging link 24. One end of the first swinging link 23 is connected to the outer ring of the eccentric bearing 22. The other end of the first swinging link 23 is rotatably connected to one end of the second swinging link 24. The other end of the second swinging link 24 is rotatably connected to the needle-shifting drive shaft 20. The blocking rod driving shaft 26 drives the eccentric shaft seat to rotate eccentrically, and the eccentric bearing 22 drives the first swinging link 23 and the second swinging link 24 to swing. Finally, the bottom line needle 14 is driven to swing back and forth left and right through the needle-shifting bracket 19.

[0036] See also Figure 5 In this embodiment, the bottom line barb 13 is rotatably connected to the bottom line hook needle 10, and the bottom line stop rod 15 is arranged on the upper side of the bottom line hook needle 10. The bottom line on the bottom line hook 13 does not have tension, so the bottom line hook 13 will not be dragged by the bottom line to swing when the bottom line hook needle 10 moves forward and backward. The swing of the bottom line hook 13 is caused by the bottom line being blocked by the bottom line stop rod 15 to generate tension and then dragged. Specifically, when the bottom line hook needle 10 moves forward and hooks the bottom line on the bottom line shifting needle 14 for the first time, the bottom line stop rod 15 does not work. When the bottom line hook needle 10 drives the bottom line to move backward once and continues to move forward, the bottom line stop rod 15 moves toward the direction close to the bottom line hook needle 10. At this time, the bottom line stop rod 15 blocks the front side of the bottom line in the thread hook needle body 12, and the bottom line hook needle 10 continues to move forward, and the bottom line stop rod 15 makes the bottom line in the thread hook needle body 12 push the bottom line barb 13 backward, and the bottom line is fixed in the bottom line barb 13, and then the bottom line stop rod 15 moves to the other side, and the thread hook needle body 12 hooks the bottom line on the current bottom line shifting needle 14, that is to say, at this time, there are bottom lines in the thread hook needle body 12 and the bottom line barb 13. When the bottom line hook needle 10 moves backward, the bottom line stop rod 15 moves again towards the bottom line hook needle 10. At this time, the bottom line stop rod 15 blocks the rear side of the bottom line in the bottom line barb 13. During the bottom line hook needle 10 moving backward, the bottom line stop rod 15 causes the bottom line in the bottom line barb 13 to drag the bottom line barb 13 to swing forward. At this time, the bottom line in the bottom line barb 13 is separated from the bottom line barb 13 and is sleeved on the outside of the bottom line in the hook needle body 12. This reciprocating process makes the bottom lines be sleeved on each other in turn to form a knot.

[0037] The knotting process of the upper thread and the lower thread of the present invention is described in detail below with reference to the accompanying drawings, wherein the upper thread is a solid line and the lower thread is a dotted line.

[0038] See also Figure 6 At this time, the upper thread needle 3 has not moved downward, the bottom line is passed through the needle hole of the bottom line setting needle 14, the upper thread is passed through the needle hole of the upper thread needle 3, and the bottom line setting needle 14 swings to the far right.

[0039] See also Figure 7 The upper thread needle 3 drives the upper thread to move downward. When the upper thread needle 3 moves to the lowest point and then moves upward for a certain distance, the upper thread will form a thread sleeve under the action of its own gravity, and this thread sleeve can allow the lower thread shifting needle 14 to pass through.

[0040] See also Figure 8 , the bottom line needle 14 swings to the left, driving the bottom line to pass through the thread sleeve of the upper thread.

[0041] See also Figures 9-10 , the bottom line hook needle 10 moves forward, the hook needle body 12 hooks the bottom line on the bottom line shifting needle 14, at this time the upper thread needle 3 moves upward, and then the bottom line shifting needle 14 swings to the right, and the upper thread and the bottom line are initially knotted.

[0042] See also Figures 11-12 The bottom line hook needle 10 moves backward once and then moves forward again. At this time, the bottom line stop rod 15 moves toward the bottom line hook needle 10, and the bottom line stop rod 15 blocks the front side of the bottom line in the hook thread needle body 12. The bottom line hook needle 10 continues to move forward, and the bottom line stop rod 15 makes the bottom line in the hook thread needle body 12 push the bottom line hook 13 backward, and the bottom line is fixed in the bottom line hook 13. Then the bottom line stop rod 15 moves to the other side. At this time, the surface thread needle 3 moves downward, and the bottom line shifting needle 14 swings to the left to drive the bottom line to enter the needle sleeve of the surface thread needle 3 again, and the hook thread needle body 12 hooks the bottom line on the current bottom line shifting needle 14, that is to say, at this time, there are bottom lines in the hook thread needle body 12 and the bottom line hook 13, and the surface thread needle 3 moves upward.

[0043] See also Fig.13 When the bottom line hook needle 10 moves backward, the bottom line stop rod 15 moves again towards the bottom line hook needle 10. At this time, the bottom line stop rod 15 blocks the rear side of the bottom line in the bottom line barb 13. During the movement of the bottom line hook needle 10 backward, the bottom line stop rod 15 makes the bottom line in the bottom line barb 13 drag the bottom line barb 13 to make it swing forward. At this time, the bottom line in the bottom line barb 13 is separated from the bottom line barb 13 and is sleeved on the outside of the bottom line in the hook needle body 12. This reciprocating process makes the bottom lines mutually sleeved into knots in turn, and finally completes the knotting of the bottom line and the surface line.

[0044] The present invention utilizes the bottom thread hook needle 10 to hook the bottom thread when the top thread on the top thread needle 3 crosses the bottom thread on the bottom thread moving needle 14, and the top thread needle 3 drives the top thread to move upward to initially complete the knotting, and then the bottom thread sleeve mechanism sleeves the current bottom thread on the bottom thread hook needle 10 onto the bottom thread hooked by the bottom thread hook needle 10 next time, and finally completes the knotting. The knotting of the bottom thread and the top thread does not depend on the fabric conveying direction, and the fabric can be fed in multiple directions.

[0045] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A sewing device capable of feeding in multiple directions, characterized in that: The sewing device capable of feeding in multiple directions comprises an upper thread needle (3), a lower thread shifting needle (14), a lower thread hook needle (10) and a lower thread looping mechanism, wherein the upper thread needle (3) is arranged vertically, the lower thread shifting needle (14) is arranged at the lower side of the upper thread needle (3), the lower thread shifting needle (14) is connected to a needle shifting driving mechanism for driving it to swing back and forth or translate, the lower thread hook needle (10) is arranged at one side of the lower thread shifting needle (14), the lower thread hook needle (10) is used to hook the lower thread when the upper thread on the upper thread needle (3) and the lower thread on the lower thread shifting needle (14) cross, the lower thread looping mechanism is arranged at one side of the lower thread hook needle (10), the lower thread looping mechanism is used to loop the current lower thread on the lower thread hook needle (10) onto the lower thread to be hooked by the lower thread hook needle (10) next time; The bottom thread hook needle (10) is connected to a hook needle driving mechanism for driving the bottom thread hook needle (10) to move back and forth horizontally, and the direction of the reciprocating horizontal movement of the bottom thread hook needle (10) is perpendicular to the swing direction of the bottom thread moving needle (14); The end of the bottom thread crochet needle (10) is provided with a thread hooking needle body (12), the thread hooking needle body (12) is arranged horizontally, and the thread hooking needle body (12) is bent in a direction away from the bottom thread shifting needle (14); The bottom thread sleeve mechanism comprises a bottom thread stopper (15), the bottom thread stopper (15) is connected to a stopper driving mechanism for driving the bottom thread stopper (15) to reciprocate or swing, and a bottom thread barb (13) is provided on the side of the bottom thread hook needle (10) away from the bottom thread shifting needle (14).

2. The sewing device capable of multi-directional feeding according to claim 1, characterized in that: The needle-shifting drive mechanism comprises a needle-shifting drive shaft (20), an eccentric bearing (22) and a connecting rod mechanism; the bottom line needle (14) is fixed on the needle-shifting drive shaft (20) through a needle-shifting bracket (19); the eccentric bearing (22) is connected to a shaft that drives the eccentric bearing to rotate; and the eccentric bearing (22) is connected to the needle-shifting drive shaft (20) through the connecting rod mechanism.

3. The sewing device capable of feeding in multiple directions according to claim 2, characterized in that: The connecting rod mechanism comprises a first swing connecting rod (23) and a second swing connecting rod (24), one end of the first swing connecting rod (23) is connected to the outer ring of the eccentric bearing (22), the other end of the first swing connecting rod (23) is rotationally connected to one end of the second swing connecting rod (24), and the other end of the second swing connecting rod (24) is rotationally connected to the needle setting drive shaft (20).

4. The sewing device capable of feeding in multiple directions according to claim 1, characterized in that: The hook drive mechanism comprises a hook drive gear (9), a hook drive connecting rod (25) and a hook drive shaft (21); the two ends of the hook drive connecting rod (25) are rotatably connected to the hook drive gear (9) and the hook drive shaft (21); the hook drive shaft (21) is arranged to slide back and forth horizontally; and the bottom hook (10) is fixedly connected to the hook drive shaft (21) through a hook bracket (11).

5. The sewing device capable of multi-directional feeding according to claim 1, characterized in that: The bottom line barb (13) is rotatably connected to the bottom line hook needle (10), and the bottom line stopper (15) is arranged on the upper side of the bottom line hook needle (10).

6. The sewing device capable of feeding in multiple directions according to claim 1, characterized in that: The baffle rod driving mechanism comprises a baffle rod driving shaft (26), a cam (27) and a spring. The baffle rod driving shaft (26) is rotatably arranged. The bottom line baffle rod (15) is horizontally arranged on a baffle rod bracket (16). The baffle rod bracket (16) is horizontally slidably arranged. The cam (27) is fixed on the baffle rod driving shaft (26) and cooperates with the baffle rod bracket. The spring pulls the baffle rod bracket (16) to move toward the side close to the bottom line hook needle (10).

7. The sewing device capable of feeding in multiple directions according to claim 6, characterized in that: The blocking rod bracket (16) is fixed on a sliding block (17), and the sliding block (17) is slidably arranged on a horizontal guide rail (18), and a spring is connected to the sliding block.

8. The sewing device capable of feeding in multiple directions according to claim 1, characterized in that: The lower thread setting needle (14), the lower thread hook needle (10) and the lower thread threading mechanism are fixed in a box (1), a surface thread plate (2) is fixed on the upper side of the box (1), and the surface thread needle (3) passes through the needle hole on the surface thread plate (2) and is inserted into the box (1).

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