Bird nest prevention sewing machine

Abstract

The utility model relates to the technical field of sewing machinery, and provides an anti-nest sewing machine which is high in sewing attractiveness and low in rejection rate and comprises a processing table and a power main machine arranged on the processing table, and a sewing head is arranged at the end of the power main machine. The sewing head comprises a connecting shell arranged at the end of the power main machine and a sewing needle arranged in the connecting shell and fixedly connected with the end of the power main machine, the bottom end of the sewing needle penetrates through the inner wall of the connecting shell and extends outwards, and a bird nest preventing structure is arranged on the outer wall of the connecting shell. One side of the connecting disc is fixed to the outer wall of the connecting shell, the telescopic air cylinder is arranged on the other side of the connecting disc, a transmission frame is arranged at the bottom of the telescopic air cylinder, a swing thread pulling structure is arranged at the end of the transmission frame, and when the sewing needle moves up and down for sewing, the telescopic air cylinder works synchronously; the swing thread pulling structure swings through the transmission frame to straighten and flatten the sewing thread.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, and particularly relates to an anti-nest sewing machine. Background Art

[0002] A sewing machine is a machine that sews one or more sewing threads on a sewing material to form one or more stitches and stitch together one or more layers of sewing materials. Sewing machines are divided into manual sewing machines and automatic sewing machines. Most of the sewing machines used in textile factories are automatic sewing machines, which can automatically sew the sewing materials placed on the module through program control, with fast sewing speed, good effect and low rejection rate.

[0003] Although the above-mentioned prior art can solve corresponding technical problems, there are still certain defects: when the existing sewing machine sews the sewing material, the sewing needle moves up and down. Sometimes, under the influence of inertia during the movement, the sewing thread on the sewing needle will move relative to the sewing needle, and then be squeezed, folded and bent. When sewing, the bent sewing needle is very easy to fold and gather into a ball during the sewing process and be sewn into the sewing material, generating a sewing thread nest, which not only greatly affects the beauty after sewing, but also is difficult to handle, resulting in an increase in the rejection rate after sewing. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an anti-nest sewing machine with high sewing beauty and low rejection rate in view of the defects and deficiencies of the prior art.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: an anti-nest sewing machine, including a processing table and a power main engine arranged on the processing table. A sewing head is arranged at the end of the power main engine. The sewing head includes a connection housing arranged at the end of the power main engine and a sewing needle arranged in the connection housing and fixedly connected to the end of the power main engine. The bottom end of the sewing needle penetrates the inner wall of the connection housing and extends outwards. An anti-nest structure is arranged on the outer wall of the connection housing. The anti-nest structure includes a connection disk fixed to one side of the outer wall of the connection housing and a telescopic cylinder arranged on the other side of the connection disk. A transmission frame is arranged at the bottom of the telescopic cylinder, and a swinging wire-pulling structure is arranged at the end of the transmission frame. When the sewing needle moves up and down for sewing, the telescopic cylinder works synchronously, and the swinging wire-pulling structure is swung through the transmission frame to straighten and smooth the sewing thread.

[0006] A further improvement is that: the sewing head further includes a medium presser foot follower arranged on the top surface of the connection housing and penetrating the upper and lower surfaces of the connection housing.

[0007] A further improvement is that: a module fixing cylinder is further fixedly arranged on the same side of the connection disk and the telescopic cylinder.

[0008] Further improvements are as follows: A sewing material pressing plate is fixedly provided on the bottom surface of the connecting plate, and a penetrating groove through which the sewing needle can pass is provided on the sewing material pressing plate.

[0009] Further improvements are as follows: The transmission frame includes a telescopic rod fixedly connected to the bottom of the telescopic cylinder and a force transmission block whose one end is movably engaged with the side surface of the bottom of the telescopic rod. A rotating force rod is provided on the other surface of the other end of the force transmission block, and a swinging wire structure is sleeved on the end of the rotating force rod away from the force transmission block.

[0010] Further improvements are as follows: A square rod is provided on the end of the rotating force rod away from the force transmission block, and the swinging wire structure is sleeved on the square rod.

[0011] Further improvements are as follows: The swinging wire structure includes a swinging piece sleeved on the end of the rotating force rod and a hook-shaped wire hooking piece provided at the other end of the swinging piece. A connecting plate is provided above the wire hooking piece, and an elastic piece group is provided on the connecting plate, and the elastic piece group covers the surface of the wire hooking piece.

[0012] Further improvements are as follows: The elastic piece group includes a first elastic piece provided between the connecting plate and the wire hooking piece and a second elastic piece covering the upper surface of the first elastic piece. The middle sections of the first elastic piece and the second elastic piece are both fixed to the connecting plate by bolts.

[0013] After adopting the above technical solutions, the beneficial effects of the present utility model are as follows: When the present utility model is sewing, the swinging of the anti-nest structure is used to make the wire hooking piece hook the sewing thread and clip it into the elastic piece group, and the sewing thread is clamped by the elasticity of the first elastic piece and the second elastic piece. When the sewing needle drops, the swinging piece swings upward to straighten the sewing thread and swings downward to hook the thread when dropping, so as to keep the sewing thread straight during the sewing process, avoid bending and gathering into a ball during the sewing process to form a sewing thread nest, ensure the aesthetic degree after sewing, and reduce the rejection rate. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the sewing machine of the present utility model;

[0016] Figure 2 It is a left-view cross-sectional structural schematic diagram of the sewing head of the present utility model;

[0017] Figure 3 This is a three-dimensional schematic diagram of the anti-bird's nest structure of the present utility model;

[0018] Figure 4 This is a left-view schematic diagram of the anti-bird's nest structure of the present utility model;

[0019] Figure 5 This is a three-dimensional schematic diagram of the structure of the telescopic cylinder cooperating with the transmission frame and the swing wire of the present utility model;

[0020] Figure 6 This is a right-view schematic diagram of the swing wire structure of the present utility model;

[0021] Figure 7 This is a rear-view schematic diagram of the swing wire structure of the present utility model. Detailed implementation manners

[0022] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Refer to Figure 1-7As shown in the figure, the technical solution adopted in this specific embodiment is as follows: An anti-nest sewing machine includes a processing table 1 and a power main unit 2 arranged on the processing table 1. A sewing head 3 is provided at the end of the power main unit 2. The sewing head 3 includes a connecting housing 31 provided at the end of the power main unit 2 and a sewing needle 33 arranged inside the connecting housing 31 and fixedly connected to the end of the power main unit 2. The bottom end of the sewing needle 33 penetrates through the inner wall of the connecting housing 31 and extends outwards. An anti-nest structure 34 is provided on the outer wall of the connecting housing 31. The anti-nest structure 34 includes a connecting disk 41 fixed to one side of the outer wall of the connecting housing 31 and a telescopic cylinder 42 arranged on the other side of the connecting disk 41. A transmission frame is provided at the bottom of the telescopic cylinder 42. The transmission frame includes a telescopic rod 52 fixedly connected to the bottom of the telescopic cylinder 42 and a force conduction block 53 whose one end is movably engaged with the side surface of the bottom of the telescopic rod 52. A rotating power rod 54 is provided on the other surface of the other end of the force conduction block 53. A swinging wire-pulling structure 56 is sleeved on the end of the rotating power rod 54 away from the force conduction block 53. A swinging wire-pulling structure 56 is provided at the end of the transmission frame. The swinging wire-pulling structure 56 includes a swinging piece 61 sleeved on one end of the rotating power rod 54 and a hook-shaped wire-hooking piece 63 arranged at the other end of the swinging piece 61. A connecting plate 62 is provided above the wire-hooking piece 63. An elastic sheet group is provided on the connecting plate 62. The elastic sheet group covers the surface of the wire-hooking piece 63. The elastic sheet group includes a first elastic sheet 65 arranged between the connecting plate 62 and the wire-hooking piece 63 and a second elastic sheet 64 covering the upper surface of the first elastic sheet 65. The middle sections of both the first elastic sheet 65 and the second elastic sheet 64 are fixed to the connecting plate 62 by bolts. When the sewing needle 33 moves up and down for sewing, the telescopic cylinder 42 works synchronously. Through the transmission frame, the swinging wire-pulling structure 56 is swung to straighten and smooth the sewing thread. When in use, the processing table 1 is placed on a sewing table surface with a moving module. Subsequently, the sewing material is conveyed to the processing table 1 through the module. At the same time, the sewing thread is arranged inside the sewing head 3 and is made to bypass the wire-hooking piece 63 of the swinging wire-pulling structure 56, so that the sewing needle 33 can move up and down by the power generated by the power main unit 2, and then sew the sewing material with the sewing thread. At the same time, during the sewing process, the telescopic cylinder 42 of the anti-nest structure 34 works, and extends downwards simultaneously when the sewing needle 33 moves downwards, and retracts upwards simultaneously when the sewing needle 33 moves upwards, generating up and down telescoping, thereby driving the telescopic rod 52 of the transmission frame to move up and down, and through the conduction of the force conduction block 52, the rotating power rod 54 engaged with the connecting disk 41 makes repeated forward and reverse rotational movements as the telescopic rod 52 moves up and down, thereby driving the swinging piece 61 of the swinging wire-pulling structure 56 and the wire-hooking piece 63 at the end of the swinging piece 61 to swing up and down, and cooperating with the elastic force generated by the first elastic sheet 65 and the second elastic sheet 64 of the elastic sheet group to clamp the sewing thread, so that when the wire-hooking piece 63 swings upwards, it is clamped, hooked and straightened.Furthermore, during the sewing process of the sewing needle 33, the sewing thread always remains straight, avoiding bending and gathering into a ball during the sewing process to form a sewing thread nest, ensuring the aesthetic degree after sewing, and reducing the rejection rate;

[0024] The sewing head 3 further includes a middle presser foot follower 32 disposed on the top surface of the connecting housing 31 and penetrating the upper and lower surfaces of the connecting housing 31, which is beneficial to pressing down the sewing material during sewing, thereby making the sewing material flatter and having a better sewing effect;

[0025] A module fixing cylinder 35 is also fixedly provided on the same side of the connecting disk 41 and the telescopic cylinder 42, which is beneficial to pressing down the module to fix the module during sewing, thereby avoiding the module from shaking and moving during the sewing process, making the sewing thread path more accurate and having a better sewing effect;

[0026] A sewing material pressing disk 43 is fixedly provided on the bottom surface of the connecting disk 41, and a through groove through which the sewing needle 33 can pass is provided on the sewing material pressing disk 43, which is beneficial to pressing down the surface of the sewing material at the sewing position, making the surface of the sewing material flatter, thereby avoiding the sewing material from folding and affecting the sewing effect;

[0027] A square rod 55 is provided at the end of the rotation force rod 54 away from the force transmission block 53, and the swing wire pulling structure 56 is sleeved on the square rod 55, which is beneficial to making the force transmission of the transmission force rod 54 more sufficient and avoiding the swing wire pulling structure 56 from slipping when the transmission force rod 54 rotates and affecting the wire pulling effect.

[0028] Working principle of the present utility model: When the present utility model is used, the processing table 1 is placed on a sewing table surface with a moving module. Subsequently, the sewing material is conveyed to the processing table 1 through the module. At the same time, the sewing thread is disposed in the sewing head 3 and passes around the thread hooking piece 63 of the swing wire pulling structure 56, so that the sewing needle 33 can move up and down through the power generated by the power host 2, and then sew the sewing material with the sewing thread. At the same time, during the sewing process, the telescopic cylinder 42 of the anti-nest structure 34 works, extending downward simultaneously when the sewing needle 33 moves downward and retracting upward simultaneously when the sewing needle 33 moves upward, generating up and down telescoping, thereby driving the telescopic rod 52 of the transmission frame to move up and down, and through the transmission of the force transmission block 52, the rotation force rod 54 engaged with the connecting disk 41 makes repeated forward and reverse rotational movements as the telescopic rod 52 moves up and down, thereby driving the swing piece 61 of the swing wire pulling structure 56 and the thread hooking piece 63 at the end of the swing piece 61 to swing up and down, and cooperating with the elastic force generated by the first elastic piece 65 and the second elastic piece 64 of the elastic piece group to clamp the sewing thread, so that when the thread hooking piece 63 swings upward, it is clamped and hooked and straightened, and furthermore, during the sewing process of the sewing needle 33, the sewing thread always remains straight, avoiding bending and gathering into a ball during the sewing process to form a sewing thread nest, ensuring the aesthetic degree after sewing, and reducing the rejection rate.

[0029] What the present utility model intends to protect is the structure of the product. The models of various components are not the content protected by the present utility model and are also well-known technologies. Any components that can achieve the above functions of the present utility model on the market can be selected and applied. Therefore, parameters such as the models of the components are not described in detail in the present utility model. The contribution of the present utility model lies in scientifically combining various components together.

[0030] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Where the present utility model is not described in detail, it is all well-known technology to those skilled in the art.

Claims

1. An anti-bird nest sewing machine, comprising a processing table (1) and a power main unit (2) arranged on the processing table (1), wherein a sewing head (3) is provided at the end of the power main unit (2), wherein the sewing head (3) comprises a connecting shell (31) arranged at the end of the power main unit (2) and a sewing needle (33) arranged in the connecting shell (31) and fixedly connected to the end of the power main unit (2), wherein the bottom end of the sewing needle (33) penetrates the inner wall of the connecting shell (31) and extends outward, and is characterized in that: The outer wall of the connecting shell (31) is provided with an anti-bird nest structure (34), the anti-bird nest structure (34) comprising a connecting plate (41) fixed to the outer wall of the connecting shell (31) on one side and a telescopic cylinder (42) arranged on the other side of the connecting plate (41), a transmission frame being provided at the bottom of the telescopic cylinder (42), and a swinging wire pulling structure (56) being provided at the end of the transmission frame, when the sewing needle (33) moves up and down for sewing, the telescopic cylinder (42) works synchronously, and the swinging wire pulling structure (56) is caused to swing through the transmission frame to straighten and flatten the sewing thread.

2. The anti-bird nest sewing machine according to claim 1, characterized in that: The sewing head (3) also includes a middle presser foot follower (32) which is arranged on the top surface of the connecting shell (31) and penetrates the upper and lower surfaces of the connecting shell (31).

3. The anti-bird nest sewing machine according to claim 1, characterized in that: A module fixing cylinder (35) is also fixedly provided on the same side of the connection plate (41) as the telescopic cylinder (42).

4. The anti-bird nest sewing machine according to claim 1, characterized in that: A sewing material pressing plate (43) is fixedly provided on the bottom surface of the connecting plate (41), and a penetration groove is provided on the sewing material pressing plate (43) through which a sewing needle (33) can pass.

5. The anti-bird nest sewing machine according to claim 1, characterized in that: The transmission frame comprises a telescopic rod (52) fixedly connected to the bottom of the telescopic cylinder (42) and a force transmission block (53) with a side surface at one end movably engaged with the side surface of the bottom of the telescopic rod (52); a rotating force rod (54) is provided on the other surface of the other end of the force transmission block (53); and a swing wire structure (56) is sleeved on the end of the rotating force rod (54) away from the force transmission block (53).

6. The anti-bird nest sewing machine according to claim 5, characterized in that: A square rod (55) is provided on the end of the rotating force rod (54) away from the force transmission block (53), and the swing wire structure (56) is sleeved on the square rod (55).

7. The anti-bird nest sewing machine according to claim 5, characterized in that: The swing wire pulling structure (56) comprises a swing plate (61) with one end sleeved on the end of the rotating force rod (54) and a hook-shaped wire hooking plate (63) arranged at the other end of the swing plate (61), a connecting plate (62) is arranged above the wire hooking plate (63), and an elastic plate group is arranged on the connecting plate (62), and the elastic plate group covers the surface of the wire hooking plate (63).

8. The anti-bird nest sewing machine according to claim 7, characterized in that: The elastic sheet group comprises a first elastic sheet (65) arranged between the connecting plate (62) and the hooking sheet (63), and a second elastic sheet (64) arranged to cover the upper surface of the first elastic sheet (65), and the middle section of the first elastic sheet (65) and the middle section of the second elastic sheet (64) are both fixed to the connecting plate (62) by bolts.

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