Auxiliary feeding device for sewing leather clothing fabric

Abstract

An auxiliary feeding device for leather clothing fabric sewing comprises a sewing platform and a sewing machine head and is characterized in that a notch is formed in the sewing platform and located below the sewing machine head, a driving roller is installed below the sewing platform, and the upper cambered surface of the driving roller penetrates through the notch and is higher than the sewing platform; the axis of the driving roller is coaxially fixed to an output shaft of the gear motor, a fan-shaped extrusion part is rotationally connected to the sewing machine frame, an arc surface is arranged on the fan-shaped extrusion part, the arc surface is close to the driving roller, and a downward pressing structure is installed between the fan-shaped extrusion part and the sewing machine frame. According to the leather clothing fabric feeding device, active auxiliary feeding can be conducted on leather clothing fabric sewing, leather clothing fabric sewing feeding is smoother, it is guaranteed that the feeding speed and the sewing needle walking speed are synchronous, and the sewing efficiency is improved.

Description

Technical Field

[0001] The present application relates to a sewing feeding device, in particular to an auxiliary feeding device for sewing leather fabrics, and belongs to the technical field of clothing processing tools. Background Art

[0002] In addition to cloth, leather is also used as clothing fabric. Leather is a more difficult material to sew. The friction between the leather fabric and the upper surface of the sewing table, and between the leather fabric and the sewing foot, is significant when sliding. This sliding friction is far greater than that of ordinary fabric during sewing. This makes it difficult to slide the leather fabric during sewing, and the feeding speed lags far behind the sewing needle speed. Traditional manual feeding methods and feed dog feeding for ordinary fabrics cannot meet sewing requirements. Leather fabric feeding is not smooth, sewing efficiency is low, and sewing quality cannot be guaranteed. This technical problem has not been well resolved. Summary of the Invention

[0003] The purpose of this application is to address the defects and shortcomings of existing leather fabrics, such as difficulty in sliding and feeding during sewing, the feeding speed lags far behind the sewing needle speed, the leather fabric is not fed smoothly, the sewing efficiency is low, and the sewing requirements cannot be met. The present application provides a leather fabric sewing auxiliary feeding device with a reasonable structure that can actively assist in feeding the leather fabric, making the leather fabric sewing feeding smoother, ensuring that the feeding speed is synchronized with the sewing needle speed, and improving the sewing efficiency.

[0004] In order to achieve the purpose of the above application, the technical solution of the present application is: a leather fabric sewing auxiliary feeding device, including a sewing platform, a sewing machine head is fixed on the sewing platform, and its characteristics are: a slot is provided on the sewing platform and below the sewing machine head, a driving roller is installed below the sewing platform, the upper arc surface of the driving roller passes through the slot and is higher than the sewing platform, a wheel axle is fixed to the axis of the driving roller, one end of the wheel axle is coaxially fixed with the output shaft of the reduction motor, a fan-shaped extrusion piece is rotatably connected to the sewing machine frame, a circular arc surface is provided on the fan-shaped extrusion piece, the circular arc surface is close to the driving roller, and a downward pressure structure is installed between the fan-shaped extrusion piece and the sewing machine frame.

[0005] Furthermore, the downward pressure structure includes an upper connecting rod, an upper connecting shaft and an extrusion piece connecting arm. The sewing machine frame located above the fan-shaped extrusion piece is rotatably connected to one end of the upper connecting rod through the upper connecting shaft, the other end of the upper connecting rod is connected to one end of the extrusion piece connecting arm, and the other end of the extrusion piece connecting arm is connected to the upper end of the fan-shaped extrusion piece.

[0006] Furthermore, the upper connecting rod and the extrusion member connecting arm are integrated.

[0007] Furthermore, the outer circumferential surface of the active roller is configured as an elastic annular surface, and the elastic annular surface is made of an elastic material with a relatively large surface friction coefficient.

[0008] Furthermore, the arc radius of the arc surface is greater than the radius of the elastic annular surface, and the arc surface is made of a metal material with a smooth surface.

[0009] Furthermore, the arc radius of the arc surface is greater than the radius of the elastic annular surface, and the arc surface is made of a metal material with a smooth surface.

[0010] Furthermore, a torsion spring is sleeved on the upper connecting shaft connecting the upper connecting rod and the sewing machine frame.

[0011] The beneficial effects of this application are:

[0012] 1. This application utilizes a motor-driven roller installed in a slot on the sewing platform to assist in feeding. This structure utilizes a fan-shaped extrusion element and rollers to clamp the fabric being sewn, and utilizes the static friction between the rollers and the leather fabric to assist in feeding. The rollers start and stop synchronously with the sewing machine, achieving synchronization between feed speed and needle speed.

[0013] 2. This application has a reasonable structure. The outer surface of the active roller that drives the fabric is provided with an elastic annular surface. The elastic annular surface is made of an elastic material with a high surface friction coefficient. This can increase the static friction between the leather fabric and the roller, preventing the roller and the leather fabric from slipping during feeding, and providing more stable auxiliary feeding.

[0014] 3. This application has a reasonable structure and can actively assist in feeding leather fabric during sewing. It effectively solves the technical problem of leather fabric sliding and feeding difficulties during sewing. The leather fabric is fed more smoothly during sewing, sewing efficiency is improved, and the sewing quality of leather clothing is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of this application.

[0016] Figure 2 This is the working status diagram of this application.

[0017] Figure 3 It is a side structural diagram of this application.

[0018] In the figure: sewing platform 1, sewing machine head 2, notch 3, driving roller 4, elastic annular surface 5, axle 6, reduction motor 7, fan-shaped extrusion 8, arc surface 9, upper connecting rod 10, upper connecting shaft 11, extrusion connecting arm 12, torsion spring 13. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] See also Figures 1 to 3 The present application discloses an auxiliary feeding device for sewing leather fabrics, comprising a sewing platform 1, on which a sewing machine head 2 is fixed, and is characterized in that a slot 3 is provided on the sewing platform 1 and below the sewing machine head 2, a driving roller 4 is installed below the sewing platform 1, the upper arc surface of the driving roller 4 passes through the slot 3 and is higher than the sewing platform 1, a wheel shaft 6 is fixed to the axis of the driving roller 4, one end of the wheel shaft 6 is coaxially fixed to the output shaft of the reduction motor 7, a fan-shaped extrusion piece 8 is rotatably connected to the sewing machine frame 2, a circular arc surface 9 is provided on the fan-shaped extrusion piece 8, the circular arc surface 9 is close to the driving roller 4, and a downward pressure structure is installed between the fan-shaped extrusion piece 8 and the sewing machine frame 2.

[0021] The downward pressing structure includes an upper connecting rod 10, an upper connecting shaft 11 and an extrusion piece connecting arm 12. The sewing machine frame 2 located above the fan-shaped extrusion piece 8 is rotatably connected to one end of the upper connecting rod 10 through the upper connecting shaft 11, and the other end of the upper connecting rod 10 is connected to one end of the extrusion piece connecting arm 12, and the other end of the extrusion piece connecting arm 12 is connected to the upper end of the fan-shaped extrusion piece 8.

[0022] The upper connecting rod 10 and the extrusion connecting arm 12 are integrally arranged.

[0023] The outer circumferential surface of the driving roller 4 is configured as an elastic annular surface 5 , and the elastic annular surface 5 is made of an elastic material with a relatively large surface friction coefficient.

[0024] The arc radius of the arc surface 9 is greater than the radius of the elastic annular surface 5 , and the arc surface 9 is made of a metal material with a smooth surface.

[0025] The upper connecting shaft 11 connecting the upper connecting rod 10 to the sewing machine frame 2 is sleeved with a torsion spring 13 .

[0026] This application installs a motor-driven roller in the slot of the sewing platform, and installs a downward-pressing fan-shaped extrusion piece on the sewing machine head above the roller. During the sewing process, the fan-shaped extrusion piece cooperates with the roller, and the fan-shaped extrusion piece and the roller clamp the sewing fabric. The roller and the sewing machine start sewing synchronously, so that the roller assists in feeding the sewing fabric, making the fabric feeding smoother. The specific structure of this application is as follows:

[0027] A sewing machine head 2 is installed on the sewing platform 1. A slot 3 is provided on the sewing platform 1 and located below the side of the sewing machine head 2. The slot 3 is located behind the sewing presser foot. The sewing processing position is directly below the sewing presser foot, and the sewing fabric is fed from the front of the sewing presser foot to the back of the presser foot.

[0028] A driving roller 4 is mounted within the slot 3 of the sewing platform 1. A small portion of the driving roller 4's circumference protrudes above the upper surface of the sewing platform 1. The driving roller 4 is fixed to an axle 6. The axis of the axle 6 is parallel to the sewing platform 1 and perpendicular to the feed direction. The axle 6 is positioned below the upper surface of the sewing platform 1. One end of the axle 6 is coaxially fixed to the output shaft of a reduction motor 7, which drives the rotation of the axle 6. The start and stop of the reduction motor 7 are synchronized with the start and stop of the sewing needle in the machine head: the reduction motor 7 starts when sewing starts and stops when sewing stops.

[0029] The lower end of the sewing machine head 2 is connected to a fan-shaped extrusion piece 8 through a downward pressing structure. The fan-shaped extrusion piece 8 is provided with an arc surface 9, and the arc surface 9 is close to the driving roller 4. The downward pressing structure includes an upper connecting rod 10, an upper connecting shaft 11 and an extrusion piece connecting arm 12. The rear side of the lower end of the sewing machine head 2 is rotatably connected to the upper connecting rod 10 through the shaft ear mounting seat and the upper connecting shaft 11. The upper connecting rod 10 is connected to the extrusion piece connecting arm 12. The upper connecting rod 10 and the extrusion piece connecting arm 12 can be integrated. The extrusion piece connecting arm 12 is connected to the upper end of the fan-shaped extrusion piece 8.

[0030] The outer circumferential surface of the driving roller 4 is configured as an elastic annular surface 5, which is made of an elastic material with a high coefficient of surface friction. This increases friction, preventing the fabric from slipping during feeding. The radius of the arc surface 9 is greater than that of the elastic annular surface 5, and the arc surface 9 is made of a smooth metal material. A torsion spring 13 is mounted on the upper connecting shaft 11, which connects the upper connecting rod 10 to the sewing machine frame 2. This torsion spring 13 increases the force with which the extrusion element connecting arm 12 presses the fan-shaped extrusion element 8 downward.

[0031] During the sewing process of leather fabric, the leather fabric first passes through the sewing foot or cloth pressing pry, and then passes through the gap between the active roller 4 and the fan-shaped extrusion piece 8. When sewing starts, the reduction motor 7 drives the active roller 4 to rotate at a constant speed. The rotation of the active roller 4 will drive the feeding of the leather fabric, thereby assisting the feeding of the leather fabric. When sewing stops, the reduction motor 7 stops, thereby stopping the rotation of the active roller 4 and stopping assisting the feeding of the leather fabric.

[0032] The above content is a further detailed description of the present application in combination with the specific implementation methods. It cannot be considered that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, the present application will also have various simple replacements, improvements and changes without departing from the concept of the present application. Various simple replacements, improvements and changes made should be deemed to fall within the scope of protection of the present application.

Claims

1. A leather fabric sewing auxiliary feeding device, comprising a sewing platform (1), a sewing machine head (2) being fixed on the sewing platform (1), characterized in that: A notch (3) is provided on the sewing platform (1) and below the sewing machine head (2). A driving roller (4) is installed below the sewing platform (1). The upper arc surface of the driving roller (4) passes through the notch (3) and is higher than the sewing platform (1). A wheel shaft (6) is fixed to the axis of the driving roller (4). One end of the wheel shaft (6) is coaxially fixed to the output shaft of the reduction motor (7). A fan-shaped extrusion piece (8) is rotatably connected to the sewing machine head (2). The fan-shaped extrusion piece (8) is provided with an arc surface (9). The arc surface (9) is close to the driving roller (4). A downward pressing structure is installed between the fan-shaped extrusion piece (8) and the sewing machine head (2).

2. The leather fabric sewing auxiliary feeding device according to claim 1, characterized in that: The pressing structure comprises an upper connecting rod (10), an upper connecting shaft (11) and an extrusion piece connecting arm (12); the sewing machine head (2) located above the fan-shaped extrusion piece (8) is rotatably connected to one end of the upper connecting rod (10) via the upper connecting shaft (11); the other end of the upper connecting rod (10) is connected to one end of the extrusion piece connecting arm (12); and the other end of the extrusion piece connecting arm (12) is connected to the upper end of the fan-shaped extrusion piece (8).

3. The leather fabric sewing auxiliary feeding device according to claim 2, characterized in that: The upper connecting rod (10) and the extrusion piece connecting arm (12) are integrally arranged.

4. The leather fabric sewing auxiliary feeding device according to claim 1, characterized in that: The outer circumferential surface of the active roller (4) is configured as an elastic annular surface (5), and the elastic annular surface (5) is made of an elastic material with a large surface friction coefficient.

5. The leather fabric sewing auxiliary feeding device according to claim 1, characterized in that: The arc radius of the arc surface (9) is greater than the radius of the elastic annular surface (5), and the arc surface (9) is made of a metal material with a smooth surface.

6. The leather fabric sewing auxiliary feeding device according to claim 2, characterized in that: A torsion spring (13) is sleeved on the upper connecting shaft (11) that connects the upper connecting rod (10) to the sewing machine head (2).

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