Presser foot assembly for industrial sewing machines

Abstract

The invention discloses a presser foot assembly of an industrial sewing machine. When it is necessary to place cloth on a sewing machine table, a connecting rod is pressed downward by hand to rotate the connecting rod downward, thereby driving a limit rod to move downward until the limit rod abuts against the sewing machine table. At this time, the limit rod extends along the front and rear direction of the presser foot. At this time, the edge of the cloth is aligned with the limit rod, so that the placement direction of the cloth can be accurate and the cloth will not be skewed. The invention enables the cloth to be placed straight and not easily skewed when placed on the sewing machine table.

Description

Technical Field

[0001] The invention relates to the technical field of sewing machines, in particular to a presser foot assembly of an industrial sewing machine. Background Art

[0002] A sewing machine is mainly composed of four parts: a machine head, a machine base, a transmission and a presser foot. It is a machine that forms one or more stitches on the fabric to interweave or sew the fabric together. Among them, the function of the presser foot is to press the fabric tightly against the feed dog so that the fabric can move during sewing.

[0003] However, currently when placing the cloth on the sewing machine table, the placement direction of the cloth is generally determined by the operator's experience, which easily causes the cloth to be placed skewed, thereby reducing the sewing quality of the cloth. Summary of the invention

[0004] The present application provides a presser foot assembly for an industrial sewing machine, which enables the cloth to be placed straight and not easily deflected when placed on the sewing machine table.

[0005] The presser foot assembly of an industrial sewing machine provided by the present application comprises:

[0006] Bracket;

[0007] A rotating rod is arranged on the bracket and can rotate around a horizontal axis A. The first end of the rotating rod has a driving part, and the rotating rod can be driven by the driving mechanism to rotate;

[0008] A mounting plate is fixedly mounted on the bracket, the mounting plate is vertically mounted, a sliding groove extending up and down is disposed on one surface of the mounting plate, and a through hole is disposed on the bottom surface of the sliding groove and penetrates to the other surface of the mounting plate;

[0009] The slider is slidably arranged in the slide groove, and a through hole is arranged on the slider. The driving part passes through the through hole and the through hole in sequence, and a part of the driving part extends out of the through hole. When the rotating rod is driven by the driving mechanism to rotate, the driving part can drive the slider to slide up and down in the slide groove;

[0010] The presser foot is located below the mounting plate, and the presser foot is fixedly connected to the slider via a connecting plate;

[0011] A connecting rod, one end of which is rotatably connected to the mounting plate, the connecting rod being capable of rotating about a horizontal axis B, and the connecting rod being located below the portion of the driving portion extending out of the through hole;

[0012] A tension spring is located above the connecting rod, the upper end of the tension spring is fixed to the mounting plate, and the lower end of the tension spring is fixed to the connecting rod; and

[0013] A limit rod is horizontally arranged and connected to the other end of the connecting rod, the limit rod is located on one side of the presser foot, and the limit rod is perpendicular to the horizontal axis A;

[0014] When the fabric to be sewn is placed under the presser foot, the connecting rod is pressed downward by hand to rotate the connecting rod downward, thereby driving the limit rod to move downward until the limit rod abuts against the sewing machine table. At this time, the limit rod can be used as a positioning reference for the placement direction of the fabric to be sewn. At this time, the tension spring is stretched. When the hand releases the connecting rod, the tension spring drives the connecting rod to move upward and reset;

[0015] When the rotating rod rotates and the driving part drives the slider to slide downward in the slide groove, the presser foot moves downward synchronously with the slider. At the same time, the part of the driving part extending out of the through hole presses the connecting rod downward, thereby driving the connecting rod to rotate downward, so as to drive the limiting rod to move downward, and finally the presser foot is pressed on the fabric to be sewn, and the limiting rod is against the sewing machine table. At this time, the limiting rod guides the movement of the fabric to be sewn.

[0016] Preferably, the middle portion of the rotating rod is rotatably connected to the bracket, and the second end of the rotating rod is connected to a driving mechanism, which is used to drive the second end of the rotating rod to move up and down.

[0017] Preferably, the driving portion extends obliquely upward from the first end of the rotating rod.

[0018] Preferably, the driving mechanism is a cylinder or a push rod motor.

[0019] Preferably, the slide groove is a dovetail groove, and the cross-sectional shape of the slider matches the slide groove.

[0020] Preferably, the connecting rod is L-shaped, comprising a first rod body extending laterally and a second rod body extending longitudinally, a connecting piece is fixedly provided at one end of the first rod body, the connecting piece is connected to the mounting plate and can rotate around a horizontal axis B, the first rod body is perpendicular to the horizontal axis B, the first rod body is located below the portion of the driving part extending out of the through hole, the other end of the first rod body is vertically connected to one end of the second rod body, and the other end of the second rod body is vertically connected to the limit rod.

[0021] Preferably, the horizontal axis A and the horizontal axis B are perpendicular to each other.

[0022] Preferably, the mounting plate has a connecting portion, the connecting portion is located above the first rod body, the upper end of the tension spring is connected to the connecting portion, and the lower end of the tension spring is connected to the first rod body.

[0023] Preferably, one end of the connecting plate is fixedly connected to the slider, and the other end of the connecting plate is provided with an end plate, and the presser foot is detachably connected to the end plate.

[0024] Preferably, the through hole is an elongated hole extending up and down.

[0025] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0026] When it is necessary to place the cloth on the sewing machine table, the connecting rod is pressed downward by hand to rotate the connecting rod downward, thereby driving the limit rod to move downward until the limit rod is against the sewing machine table. At this time, the limit rod extends along the front and rear direction of the presser foot. At this time, the edge of the cloth is aligned with the limit rod, so that the placement direction of the cloth can be accurate and the cloth will not be skewed. When the cloth is placed, the connecting rod is released, and the tension spring drives the connecting rod to move upward and reset; and when the cloth starts to be sewn, the driving mechanism drives the rotating rod to rotate, The driving unit drives the slider to slide downward in the slide groove, and the presser foot moves downward synchronously with the slider. At the same time, the part of the driving unit extending out of the through hole presses the connecting rod downward, thereby driving the connecting rod to rotate downward, so as to drive the limiting rod to move downward, and finally the presser foot is pressed on the fabric to be sewn, that is, the presser foot presses the fabric on the feed dog, and the limiting rod is against the sewing machine table. At this time, the edge of the fabric is aligned with the limiting rod, and the fabric can move in the direction of the limiting rod. The limiting rod guides the movement of the fabric, thereby completing the sewing of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a structural schematic diagram of another perspective of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the rotating rod. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products, or devices.

[0033] like Figure 1~Figure 3 As shown, the presser foot assembly of the industrial sewing machine of this embodiment includes a bracket 10, a rotating rod 20, a mounting plate 30, a slider 40, a presser foot 50, a connecting rod 60, a tension spring 70 and a limiting rod 80.

[0034] The rotating rod 20 is arranged on the bracket 10 and can rotate around a horizontal axis A. The horizontal axis A is arranged horizontally. The first end of the rotating rod 20 has a driving part 21. The middle part of the rotating rod 20 is rotatably connected to the bracket 10. The second end of the rotating rod 20 is connected to the driving mechanism. The driving mechanism is used to drive the second end of the rotating rod 20 to move up and down, so that the rotating rod 20 can be driven by the driving mechanism to rotate. The driving mechanism is a cylinder or a push rod motor, and the output shaft of the driving mechanism is arranged vertically.

[0035] The mounting plate 30 is fixedly mounted on the bracket 10, and the mounting plate 30 is vertically mounted. A sliding groove 31 extending up and down is disposed on one surface of the mounting plate 30, and a through hole 32 penetrating to the other surface of the mounting plate 30 is disposed at the bottom of the sliding groove 31. The through hole 32 is a long hole extending up and down.

[0036] The slider 40 is slidably arranged in the slide groove 31, so that the slider 40 can slide up and down along the slide groove 31. The slide groove 31 is a dovetail groove, and the cross-sectional shape of the slider 40 is consistent with the slide groove 31, which ensures that when the slider 40 slides in the slide groove 31, the slider 40 will not fall out of the slide groove 31.

[0037] A through hole 41 is provided on the slider 40, and the driving part 21 passes through the through hole 32 and the through hole 41 in sequence. A part of the driving part 21 extends out of the through hole 41, and a certain gap is left between the driving part 21 and the hole wall of the through hole 41. The driving part 21 extends upward from the first end of the rotating rod 20, so that when the rotating rod 20 rotates, the driving part 21 can better drive the slider 40 to move.

[0038] When the rotating rod 20 is driven by the driving mechanism to rotate, the driving portion 21 can drive the slider 40 to slide up and down in the sliding groove 31 .

[0039] The presser foot 50 is located below the mounting plate 30. The presser foot 50 is fixedly connected to the slider 40 via a connecting plate 51. The presser foot 50 is horizontally arranged. When the presser foot 50 is pressed down, the cloth can be pressed onto the feed dog on the sewing machine table, and the feed dog can drive the cloth to move.

[0040] One end of the connecting rod 60 is rotatably connected to the mounting plate 30 . The connecting rod 60 can rotate around the horizontal axis B. The connecting rod 60 is located below the portion of the driving part 21 extending out of the through hole 41 . The horizontal axis A and the horizontal axis B are perpendicular to each other.

[0041] The tension spring 70 is located above the connecting rod 60 , the upper end of the tension spring 70 is fixed to the mounting plate 30 , and the lower end of the tension spring 70 is fixed to the connecting rod 60 , so that the tension spring 70 can apply an upward rotation force to the connecting rod 60 .

[0042] The limiting rod 80 is horizontally arranged and connected to the other end of the connecting rod 60 . The limiting rod 80 is located at one side of the presser foot 50 . The limiting rod 80 is perpendicular to the horizontal axis A and extends along the front-rear direction of the presser foot 50 .

[0043] The connecting rod 60 is L-shaped, and the connecting rod 60 includes a first rod body 61 extending laterally and a second rod body 62 extending longitudinally. The first rod body 61 and the second rod body 62 are integrally formed, and one end of the first rod body 61 is fixedly set on the outer wall of the connecting member 611. The connecting member 611 is cylindrical, and the connecting member 611 is connected to the mounting plate 30 and can rotate around the horizontal axis B. The first rod body 61 is perpendicular to the horizontal axis B. The first rod body 61 is located below the part of the driving part 21 extending out of the through hole 41. The other end of the first rod body 61 is vertically connected to one end of the second rod body 62. The second rod body 62 is also perpendicular to the horizontal axis B. The other end of the second rod body 62 is vertically connected to the limit rod 80.

[0044] The mounting plate 30 has a connecting portion 33, which is integrally formed on the mounting plate 30 and is located above the first rod body 61. The upper end of the tension spring 70 is connected to the connecting portion 33, and the lower end of the tension spring 70 is connected to the first rod body 61, so that the tension spring 70 is easy to install.

[0045] One end of the connecting plate 51 is fixedly connected to the slider 40, and the other end of the connecting plate 51 is provided with an end plate 511. The presser foot 50 is connected to the end plate 511 by screws. In this way, when a different type of presser foot 50 is needed, the presser foot 50 can be replaced more conveniently.

[0046] When the fabric is placed on the sewing machine table, the fabric to be sewn is placed under the presser foot 50, and then the connecting rod 60 is pressed downward by hand to rotate the connecting rod 60 downward, thereby driving the limiting rod 80 to move downward until the limiting rod 80 is against the sewing machine table. At this time, the limiting rod 80 can be used as a positioning reference for the placement direction of the fabric to be sewn. The placement position and direction of the fabric can be adjusted according to the limiting rod 80 so that the edge of the fabric is aligned with the limiting rod 80. At this time, the tension spring 70 is stretched. When the hand releases the connecting rod 60, the tension spring 70 drives the connecting rod 60 to move upward and reset.

[0047] When sewing the cloth starts, the driving mechanism drives the rotating rod 20 to rotate, so that the driving part 21 drives the slider 40 to slide downward in the slide groove 31, and the presser foot 50 moves downward synchronously with the slider 40. At the same time, the part of the driving part 21 extending from the through hole 41 presses the connecting rod 60 downward, thereby driving the connecting rod 60 to rotate downward, so as to drive the limiting rod 80 to move downward, and finally the presser foot 50 is pressed on the cloth to be sewn, that is, the presser foot 50 presses the cloth on the feed dog, and the limiting rod 80 is against the sewing machine table. At this time, the limiting rod 80 guides the movement of the cloth to be sewn, that is, at this time, the edge of the cloth is aligned with the limiting rod 80, and the cloth can move along the direction of the limiting rod 80, so that the direction of the cloth movement is more accurate.

[0048] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. And the above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0049] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

[0050] This specification and drawings are merely exemplary illustrations of the present application and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, a person skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application intends to include these modifications and variations.

Claims

1. A presser foot assembly for an industrial sewing machine, characterized in that: include: Bracket (10); A rotating rod (20) is arranged on the bracket (10) and is capable of rotating about a horizontal axis A. The first end of the rotating rod (20) has a driving portion (21). The rotating rod (20) can be driven by a driving mechanism to rotate. A mounting plate (30) is fixedly mounted on the bracket (10), the mounting plate (30) being arranged vertically, a sliding groove (31) extending vertically is arranged on one surface of the mounting plate (30), and a through hole (32) is arranged on the bottom surface of the sliding groove (31) penetrating to the other surface of the mounting plate (30); The slider (40) is slidably disposed in the slide groove (31); a through hole (41) is disposed on the slider (40); the driving portion (21) passes through the through hole (32) and the through hole (41) in sequence; a portion of the driving portion (21) extends out of the through hole (41); when the rotating rod (20) is driven by the driving mechanism to rotate, the driving portion (21) can drive the slider (40) to slide up and down in the slide groove (31); A presser foot (50) is located below the mounting plate (30), and the presser foot (50) is fixedly connected to the slider (40) via a connecting plate (51); A connecting rod (60), one end of which is rotatably connected to the mounting plate (30), the connecting rod (60) being capable of rotating about a horizontal axis B, and the connecting rod (60) being located below a portion of the driving portion (21) extending out of the through hole (41); A tension spring (70) is located above the connecting rod (60), the upper end of the tension spring (70) is fixed to the mounting plate (30), and the lower end of the tension spring (70) is fixed to the connecting rod (60); and A limit rod (80) is horizontally arranged and connected to the other end of the connecting rod (60), the limit rod (80) is located on one side of the presser foot (50), and the limit rod (80) is perpendicular to the horizontal axis A; When the fabric to be sewn is placed under the presser foot (50), the connecting rod (60) is pressed downward by hand to rotate the connecting rod (60) downward, thereby driving the limit rod (80) to move downward until the limit rod (80) abuts against the sewing machine table. At this time, the limit rod (80) can be used as a positioning reference for the placement direction of the fabric to be sewn. At this time, the tension spring (70) is stretched. When the connecting rod (60) is released by hand, the tension spring (70) drives the connecting rod (60) to move upward and reset. When the rotating rod (20) rotates and the driving part (21) drives the slider (40) to slide downward in the sliding groove (31), the presser foot (50) moves downward synchronously with the slider (40), and at the same time, the part of the driving part (21) extending from the through hole (41) presses the connecting rod (60) downward, thereby driving the connecting rod (60) to rotate downward, so as to drive the limiting rod (80) to move downward, and finally the presser foot (50) is pressed on the fabric to be sewn, and the limiting rod (80) is against the sewing machine table. At this time, the limiting rod (80) plays a guiding role in the movement of the fabric to be sewn.

2. The presser foot assembly of an industrial sewing machine according to claim 1, characterized in that: The middle portion of the rotating rod (20) is rotatably connected to the bracket (10), and the second end of the rotating rod (20) is connected to a driving mechanism, which is used to drive the second end of the rotating rod (20) to move up and down.

3. The presser foot assembly of an industrial sewing machine according to claim 2, characterized in that: The driving portion (21) extends obliquely upward from the first end of the rotating rod (20).

4. The presser foot assembly of an industrial sewing machine according to claim 2, characterized in that: The driving mechanism is a cylinder or a push rod motor.

5. The presser foot assembly of an industrial sewing machine according to claim 1, characterized in that: The slide groove (31) is a dovetail groove, and the cross-sectional shape of the slider (40) matches the slide groove (31).

6. The presser foot assembly of an industrial sewing machine according to claim 1, characterized in that: The connecting rod (60) is L-shaped, and comprises a first rod body (61) extending transversely and a second rod body (62) extending longitudinally. A connecting piece (611) is fixedly provided at one end of the first rod body (61). The connecting piece (611) is connected to the mounting plate (30) and is rotatable around a horizontal axis B. The first rod body (61) is perpendicular to the horizontal axis B. The first rod body (61) is located below a portion of the driving portion (21) extending out of the through hole (41). The other end of the first rod body (61) is vertically connected to one end of the second rod body (62), and the other end of the second rod body (62) is vertically connected to a limiting rod (80).

7. The presser foot assembly of an industrial sewing machine according to claim 6, characterized in that: The horizontal axis A and the horizontal axis B are perpendicular to each other.

8. The presser foot assembly of an industrial sewing machine according to claim 6, characterized in that: The mounting plate (30) has a connecting portion (33), the connecting portion (33) is located above the first rod body (61), the upper end of the tension spring (70) is connected to the connecting portion (33), and the lower end of the tension spring (70) is connected to the first rod body (61).

9. The presser foot assembly of an industrial sewing machine according to claim 1, characterized in that: One end of the connecting plate (51) is fixedly connected to the slider (40), and the other end of the connecting plate (51) is provided with an end plate (511), and the presser foot (50) is detachably connected to the end plate (511).

10. The presser foot assembly of an industrial sewing machine according to claim 1, characterized in that: The through hole (32) is an elongated hole extending up and down.

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