Adjustable stitch length guide mechanism for industrial sewing machine

Abstract

The utility model provides a kind of adjustable seam guide ware mechanism of industrial sewing machine, including support cross bar being located on presser foot or presser foot connecting block, positioning plate being located in support cross bar one end, the support cross bar still be equipped with the installation sleeve plate slidable or rotatable on support cross bar, installation sleeve plate is equipped with the fixed structure for fixed, still include with the fixed seat of installation sleeve plate integral setting or connection, the fixed seat upper end is equipped with the elastic material baffle for positioning;The fixed seat lower end is equipped with the elastic material baffle for pressing cloth.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to an adjustable seam spacing guide mechanism for industrial sewing machines. Background Technology

[0002] To create straight or equidistant stitches during sewing, sewing machines are typically equipped with a guide mechanism, also known as a quilting presser bar or quilting bar. This mechanism primarily assists in creating parallel stitches. When several parallel lines that are equally spaced need to be sewn onto fabric, the old method involved drawing lines on the fabric with chalk. However, the lines drawn with chalk are of varying thicknesses, making it difficult to ensure that the spacing between the lines is consistent during sewing. Therefore, a quilting bar is often used during sewing to ensure the proper spacing between the lines.

[0003] In existing technologies, aircraft positioning typically only has a very thin baffle to hold the fabric in place. The baffle is not elastic, so there is no rebound effect when the fabric is pulled. The fabric is prone to getting stuck when moving the sewing machine. The contact area between the baffle and the fabric is very small, and the fabric is prone to shifting left and right, resulting in poor positioning. If you want to position fabrics of different thicknesses, you need to adjust the pressure of the baffle, that is, turn the knob on the back to rotate the baffle and fix it. This operation is cumbersome, time-consuming and laborious. Utility Model Content

[0004] To address the problems of the prior art, this utility model provides an adjustable seam spacing guide mechanism for industrial sewing machines. Both the pressure plate and the stop plate are made of elastic sheets, making the fabric pull smoother and less prone to jamming.

[0005] The technical solution adopted is as follows: An adjustable seam guide mechanism for an industrial sewing machine includes a support crossbar on the presser foot or presser foot connecting block, a positioning plate at one end of the support crossbar, a mounting sleeve plate that can slide or rotate on the support crossbar, a fixing structure for fixing on the mounting sleeve plate, and a fixing seat integrally formed or connected with the mounting sleeve plate. The upper end of the fixing seat is provided with a flexible material stop for positioning; the lower end of the fixing seat is provided with a flexible material pressure plate for pressing the fabric.

[0006] Furthermore, the pressure plate and the baffle plate are slidably connected at one end, and the pressure plate is provided with a limiting slot that cooperates with the baffle plate and limits the movement of the baffle plate.

[0007] Furthermore, the pressure plate includes a pressure plate portion connected to the fixed base and an upwardly extending extension portion.

[0008] Furthermore, the baffle plate includes a connecting part connected to the fixed base and a baffle part disposed in the limiting slot and connected to the pressure plate.

[0009] Furthermore, an arc surface that mates with the fabric is provided between the pressure plate portion and the extension portion.

[0010] Furthermore, the baffle plate, the fixing seat, and the pressure plate are connected near the mounting plate by connecting bolts.

[0011] Furthermore, the baffle plate has a pressure plate that cooperates with the support crossbar at one end near the mounting sleeve.

[0012] Furthermore, the fixing structure is a fixing bolt that presses a pressure plate onto the support crossbar for fixing.

[0013] Furthermore, the fixed base is provided with an adjustment structure that allows for adjustment of the pressure of the pressure plate.

[0014] Furthermore, the adjustment structure is an adjusting bolt located above the baffle plate, which can adjust the distance between the fixed base and the pressure plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a guide mechanism for an adjustable seam spacing in an industrial sewing machine. It includes a sliding and rotatable mounting plate on a support crossbar, and a fixed base integrally formed or connected to the mounting plate. A material stop plate and a pressure plate are respectively connected to the upper and lower ends of the fixed base. Both the material stop plate and the pressure plate are elastic. The fabric is positioned below the material stop plate and the pressure plate, exhibiting a rebound effect during movement and preventing jamming due to excessive pressure. Furthermore, this utility model improves the fabric positioning effect of the pressure plate. The pressure plate has a limiting slot for limiting the material stop plate, preventing it from wobbling left and right and improving positioning. An adjustment structure is provided between the pressure plate and the fixed base, allowing direct rotation of the adjusting bolt to adjust the pressure of the pressure plate. This convenient operation allows for adjustment according to different fabric thicknesses, making it widely applicable. Attached Figure Description

[0016] Figure 1 , 3 This is a schematic diagram of the structure of the present invention installed on the presser foot at two different angles; Figure 2 , 4 Figures 5 and 6 are schematic diagrams of the structure of this utility model from four different angles; Among them, the supporting crossbar 1, positioning plate 2, mounting sleeve plate 3, fixing seat 4, baffle plate 5, connecting part 501, baffle part 502, fixing structure 6, adjusting structure 7, limiting slot 8, pressing plate 9, pressing plate part 901, extension part 902, arc surface 10, connecting bolt 11, pressing plate 12, pressing foot connecting block 13, and groove 14. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments.

[0018] In the description of this utility model, it should be understood that the terms "left," "right," "up," and "down," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model. "Left" refers to the mounting sleeve 3 along the support crossbar towards the positioning plate; "right" refers to the mounting sleeve 3 along the support crossbar away from the positioning plate.

[0019] refer to Figure 1-6 An adjustable seam guide mechanism for an industrial sewing machine includes a support crossbar 1 mounted on a presser foot or presser foot connecting block 13, a positioning plate 2 mounted at one end of the support crossbar 1, a mounting sleeve 3 that can slide or rotate on the support crossbar 1, a fixing structure 6 for fixing on the mounting sleeve 3, and a fixing seat 4 integrally set or connected with the mounting sleeve 3. The fixing seat 4 has an elastic baffle 5 at its upper end and an elastic pressure plate 9 at its lower end. The baffle and pressure plate can be made of elastic metal sheets.

[0020] The fixing base 4 is used to support and connect the baffle plate 5 and the pressure plate 9, enhancing the rigidity of the baffle plate. Both the baffle plate 5 and the pressure plate 9 are made of elastic materials and are pressed onto the fabric, cooperating with the fabric. When the fabric below the baffle plate 5 and the pressure plate 9 is pulled, due to the rebound characteristics of both the baffle plate and the pressure plate, the fabric moves upward in the vertical direction with little resistance, making it relatively smooth and less prone to jamming.

[0021] The pressing plate 9 and the baffle plate 5 are slidably connected at one end. The pressing plate 9 is provided with a limiting slot 8 that cooperates with the baffle plate 5 and limits the position of the baffle plate 5.

[0022] The pressure plate 9 includes a pressure plate portion 901 connected to a fixed base and an upwardly extending extension portion 902. The pressure plate portion 901 and the extension portion 902 are set at a certain angle. Preferably, an arc surface 10 that mates with the fabric is provided between the pressure plate portion 901 and the extension portion 902. The arc surface 10 mates with the fabric, facilitating the pulling and movement of the fabric, and the smooth surface of the arc surface prevents scratching the fabric.

[0023] By simultaneously pressing the fabric with the pressure plate 9 and the baffle plate 5, the contact area with the fabric is larger, the positioning effect of the fabric is better, and the fabric is less likely to shift left or right.

[0024] The baffle plate 5 includes a connecting part 501 connected to the fixed base 4 and a baffle part 502 located in the limiting slot 8 and connected to the pressure plate 9. The limiting slot 8 is provided to allow the baffle plate 5 and the pressure plate 9 to slide vertically relative to each other without being affected when the pressure plate or the baffle plate rebounds. At the same time, the limiting slot 8 limits the left and right movement of the baffle plate 5, keeping it straight and preventing it from shifting left or right, thus improving the positioning effect. The limiting slot 8 is located at the connection between the pressure plate part 901 and the extension part 902, and is adapted to the shape of the pressure plate part and the extension part. The shape of the baffle part 502 is adapted to the shape of the limiting slot, and at least a part of the baffle part 502 protrudes from the limiting slot, serving to position and stop the fabric.

[0025] The baffle plate 5, the fixed base 4, and the pressure plate 9 are connected near the mounting sleeve 3 by connecting bolts 11. The connecting bolts 11 connect and fix the baffle plate and the pressure plate to the fixed base. However, since the baffle plate and the pressure plate are made of elastic material, they can still move up and down slightly under the action of elasticity.

[0026] The baffle plate 5 has a pressure plate 12 near the mounting sleeve plate 3 that cooperates with the support crossbar 1. The fixing structure 6 is a fixing bolt that presses the pressure plate 12 onto the support crossbar 1 for fixation. Of course, the fixing structure 6 can also adopt other structures, as long as it can ensure that the mounting sleeve plate 3 is fixed to the support crossbar 1. The mounting sleeve plate 3 can slide laterally on the support crossbar 1, where "lateral" refers to left and right sliding, that is, adjusting the distance between the mounting sleeve plate 3 and the positioning plate 2; the mounting sleeve plate 3 can also be rotatably mounted on the support crossbar 1.

[0027] The positioning plate 2 is fixedly connected to the presser foot or presser foot connecting block, thus fixing the position of the support crossbar 1. The positioning plate 2 is provided with a groove 14 for bolts to pass through and connect the positioning plate and the presser foot connecting block 13. The seam spacing can be changed by adjusting the distance between the mounting sleeve 3 and the positioning plate 2. At the same time, the mounting sleeve 3 can be rotated according to the thickness of the fabric to make the pressure plate and the stop plate at a suitable height for better fit with the fabric. After adjustment, it is fixed by rotating the fixing bolt, which presses the pressure plate 12 onto the support crossbar 1 to achieve a fixed effect.

[0028] Preferably, the fixed base 4 is provided with an adjustment structure 7 for adjusting the pressing degree of the pressure plate 9. The adjustment structure 7 is an adjustment bolt located above the baffle plate 5, which adjusts the distance between the fixed base and the pressure plate 9. The adjustment bolt is located on the fixed base and the pressure plate 9, with the lower end of the adjustment bolt pressing against the pressure plate 9. By rotating the adjustment bolt, the distance between the fixed base and the pressure plate is changed, driving the pressure plate 9 to press down on the fabric. The pressing degree of the pressure plate 9 can be adjusted according to the thickness of the fabric, and the operation is convenient, requiring only the rotation of the adjustment bolt without manually rotating and adjusting the position of the pressure plate 9.

[0029] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A guide mechanism for an adjustable seam spacing of an industrial sewing machine, comprising a support crossbar (1) disposed on a presser foot or presser foot connecting block (13), a positioning plate (2) disposed at one end of the support crossbar (1), wherein the support crossbar (1) is further provided with a mounting sleeve plate (3) which can slide or rotate on the support crossbar (1), and the mounting sleeve plate (3) is provided with a fixing structure (6) for fixing, characterized in that: It also includes a fixing seat (4) integrally set or connected with the mounting plate (3), wherein the upper end of the fixing seat (4) is provided with an elastic baffle (5) for positioning; and the lower end of the fixing seat (4) is provided with an elastic pressure plate (9) for pressing the cloth.

2. The guide mechanism for adjustable seam spacing in an industrial sewing machine as described in claim 1, characterized in that: The pressing plate (9) and the baffle plate (5) are slidably connected at one end. The pressing plate (9) is provided with a limiting slot (8) that cooperates with the baffle plate (5) and limits the baffle plate (5).

3. The guide mechanism for adjustable seam spacing in an industrial sewing machine as described in claim 1, characterized in that: The pressure plate (9) includes a pressure plate portion (901) connected to the fixed base (4) and an upwardly extending extension portion (902).

4. The guide mechanism for adjustable seam spacing in an industrial sewing machine as described in claim 1, characterized in that: The baffle plate (5) includes a connecting part (501) connected to the fixed base (4) and a baffle part (502) provided in the limiting slot (8) and connected to the pressure plate (9).

5. The guide mechanism for adjustable seam spacing in an industrial sewing machine as described in claim 3, characterized in that: An arc surface (10) that mates with the fabric is provided between the pressure plate (901) and the extension (902).

6. The guide mechanism for adjustable seam spacing in an industrial sewing machine as described in claim 1, characterized in that: The baffle plate (5), the fixed seat (4) and the pressure plate (9) are connected near the mounting sleeve plate (3) by connecting bolts (11).

7. The guide mechanism for adjustable seam spacing in an industrial sewing machine as described in claim 1, characterized in that: The baffle plate (5) is provided with a pressure plate (12) that cooperates with the support crossbar (1) at one end near the mounting sleeve plate (3).

8. The guide mechanism for adjustable seam spacing in an industrial sewing machine as described in claim 7, characterized in that: The fixing structure (6) is a fixing bolt for pressing a pressure plate (12) onto the support crossbar (1).

9. The guide mechanism for an adjustable seam spacing industrial sewing machine as described in claim 1, characterized in that: The fixed base (4) is provided with an adjustment structure (7) for adjusting the pressure of the pressure plate (9).

10. The guide mechanism for an adjustable seam spacing industrial sewing machine as described in claim 9, characterized in that: The adjustment structure (7) is an adjustment bolt located above the baffle plate (5) and adjustable for the distance between the fixed seat and the pressure plate (9).

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