Auxiliary cutting mechanism of a spreading frame of a circular knitting machine

Abstract

The utility model discloses an auxiliary cloth cutting mechanism of big circle machine cloth spreading frame belongs to big circle machine accessory technical field, including the base of symmetrical distribution in big circle machine both sides, two base all connect two cloth spreading rods one end, two cloth spreading rods stretch the cloth to its both ends, and the clearance position between the both ends of cloth spreading rod is provided with cutter, is provided with the transmission assembly of making the cutter cutting edge cutting cloth can push flat its contact position cloth on the base, and the tangent of cutter cutting edge cutting cloth is not greater than 10 degrees with the included angle between the plane of two tangent lines of the axis of cloth spreading rod of its both sides close to. The utility model discloses an auxiliary cloth cutting mechanism of big circle machine cloth spreading frame, and the cutter will carry out the sliding along the opening and the swing around the rotation axis, so that the contact point of cutter cutting cloth changes along the cutting edge of cutter constantly, and makes cutter cut open cloth more easily.

Description

Technical Field

[0001] This utility model relates to the technical field of circular knitting machine accessories, specifically to the auxiliary fabric cutting mechanism of the fabric spreading frame of a circular knitting machine. Background Technology

[0002] A circular knitting machine fabric stretcher is a device that stretches the circular fabric woven by a circular knitting machine laterally. It is usually installed below the circular knitting machine.

[0003] In order to remove the fabric after it has been stretched by the spreader, the existing technology usually sets a cutter on each of the two sides of the spreader. The traction force generated when the fabric moves is used to cut the stretched fabric into two pieces.

[0004] In actual production, it was found that since the main structure of the fabric stretching frame consists of two tubular structures that are both U-shaped and open towards the ground, the fabric will shrink due to a sudden decrease in tension before leaving the two tubular structures and reaching the cutter. This forms a wave structure between the cutter blade and the two tubular structures, making it difficult for the cutter to align with the original cutting line and causing the cutting position to easily deviate.

[0005] To address the aforementioned issues, an auxiliary fabric cutting mechanism for the fabric spreading frame of a large circular knitting machine is proposed. Utility Model Content

[0006] The purpose of this utility model is to solve the problems in the prior art by proposing an auxiliary fabric cutting mechanism for the fabric spreading frame of a large circular knitting machine.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an auxiliary fabric cutting mechanism for a circular knitting machine fabric spreading frame, comprising bases symmetrically distributed on both sides of the circular knitting machine, each base being connected to one end of two fabric spreading rods, the two fabric spreading rods stretching the fabric toward their ends, a cutter being provided at the gap between the two ends of the fabric spreading rods, and a transmission component being provided on the base to allow the cutter blade to flatten the fabric at its contact position when cutting the fabric, the included angle between the tangent line of the cutter blade cutting the fabric and the two tangent lines of the two fabric spreading rod axes close to each other on both sides being no greater than 10 degrees.

[0008] The present invention is further configured such that: the transmission component includes a slider, a bracket, a roller, a variable diameter cam, and a drive motor; the drive motor is fixedly mounted on the base, and its output end is coaxially fixed with the variable diameter cam; the bracket is fixedly connected to the base; the bracket has an opening integrally formed thereon to guide the slider to slide through it; one end of the slider is rotatably connected to a roller that rolls along the surface of the variable diameter cam; and the other end of the slider is connected to a cutter.

[0009] The present invention is further configured such that: one end of the slider protruding from the opening is rotatably connected to the cutter; the cutter is integrally formed with a guide portion that can be inserted into the opening; when the slider slides along the opening, the cutter oscillates back and forth around the axis of rotation of the cutter and the slider.

[0010] The present invention is further configured such that: the drive motor rotates in one direction, the diameter of the variable diameter cam increases smoothly in one direction along the direction of its rotation driven by the drive motor to a complete revolution, and the maximum difference in the diameter of the variable diameter cam is less than or equal to 1 cm.

[0011] The present invention is further configured such that the variable diameter cam, slider and roller are all made of impact-resistant material.

[0012] The present invention is further configured such that: the base is close to the outer end face of the blade, and is parallel to the tangent line of the blade cutting the fabric when the blade slides to the limit position of the stroke, and at this time the distance between the blade and the end face is less than or equal to 0.5 cm.

[0013] The present invention is further configured to include an adjusting motor, which is fixedly mounted on the base, and the output end of the adjusting motor can be used to drive the two spreading rods to swing symmetrically.

[0014] In summary, this utility model has the following beneficial effects: the cutter slides along the opening and swings around the rotation axis, causing the contact point of the cutter to cut the fabric to continuously change along the cutting edge, making it easier for the cutter to cut the fabric. At the same time, the cutting edge position that is not in contact with the fabric will also come into contact with the surface of the fabric to be cut due to the swing of the cutter, so that the surface of the fabric is gradually smoothed before being cut, making it easier for the cutter to align with the original cutting line when cutting, and making the cutting more precise. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 This mainly reflects the state of the auxiliary fabric cutting mechanism installed on the large circular knitting machine; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0016] In the diagram: 1. Adjusting motor; 2. Fabric spreading rod; 3. Base; 4. Cutter; 41. Guide part; 5. Slider; 51. Opening; 6. Bracket; 7. Roller; 8. Variable diameter cam; 9. Drive motor. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] The auxiliary fabric cutting mechanism of the fabric spreading frame of a large circular knitting machine, such as Figure 1 as well as Figure 2 As shown, the machine includes a base 3 symmetrically distributed on both sides of the large circular knives and an adjusting motor 1. Each base 3 is connected to one end of a pair of fabric spreading rods 2. The fabric spreading rods 2 stretch the fabric towards their ends. The adjusting motor 1 is fixedly mounted on the base 3. The output end of the adjusting motor 1 can be used to drive the symmetrical cutter 4 of the two fabric spreading rods 2 to swing. The cutter 4 is provided at the gap between the two ends of the fabric spreading rods 2. In order to make the cutter 4 better smooth the fabric with a wave structure before cutting, the base 3 is provided with a transmission component that can flatten the fabric at the contact position when the cutter 4 cuts the fabric. In order to make the cutter 4 maintain its cutting stability during cutting, the angle between the planes where the cutter 4 cuts the fabric and the two cuts of the two fabric spreading rods 2 on both sides are located is no more than 10 degrees. Specifically, the transmission assembly includes a slider 5, a bracket 6, a roller 7, a variable diameter cam 8, and a drive motor 9. The drive motor 9 is fixedly mounted on the base 3, and its output end is coaxially fixed with the variable diameter cam 8. The bracket 6 is fixedly connected to the base 3. An opening 51 is integrally formed on the bracket 6 to guide the slider 5 through it. One end of the slider 5 is rotatably connected to the roller 7 that rolls along the surface of the variable diameter cam 8. The other end of the slider 5 is connected to the cutter 4. The end of the slider 5 that protrudes from the opening 51 is rotatably connected to the cutter 4. The cutter 4 is integrally formed with a guide part 41 that can be inserted into the opening 51. When the slider 5 slides along the opening 51, the cutter 4 swings back and forth around the axis of rotation of the cutter and the slider 5. In the above structure, the cutter 4 slides along the opening 51 and swings around the rotation axis, so that the contact point of the cutter 4 cutting the fabric changes continuously along the cutting edge of the cutter 4, making it easier for the cutter 4 to cut the fabric. At the same time, the cutting edge of the cutter 4 that is not in contact with the fabric will also come into contact with the surface of the fabric to be cut due to the swing of the cutter 4, so that the surface of the fabric is gradually smoothed before being cut, making it easier for the cutter 4 to align with the original cutting line when cutting, making the cutting more precise.

[0019] like Figure 1 as well as Figure 2 As shown, due to the limited length of the cutting edge of the cutter 4, in order to make the cutting edge of the cutter 4 return to a sufficiently long length to smooth the fabric as quickly as possible, the drive motor 9 rotates in one direction, and the diameter of the variable diameter cam 8 smoothly increases in one direction to a complete revolution along the direction of its rotation driven by the drive motor 9. The maximum difference in the diameter of the variable diameter cam 8 is less than or equal to 1 cm. Since the roller 7 will fall and collide with the surface of the variable diameter cam 8 every time the variable diameter cam 8 rotates, the variable diameter cam 8, the slider 5, and the roller 7 are all made of impact-resistant steel. In order to limit the smoothing effect of the cutting edge of the cutter 4, the base 3 is close to the outer end face of the cutting edge of the cutter 4, and is parallel to the tangent line of the cutting edge of the cutter 4 cutting the fabric when the cutter 4 slides to the limit position of its stroke, and at this time the distance between the cutter 4 and the end face is less than or equal to 0.5 cm.

[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0021] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An auxiliary fabric cutting mechanism for a circular knitting machine's fabric spreading frame, comprising bases (3) symmetrically distributed on both sides of the circular knitting machine, each base (3) being connected to one end of two fabric spreading rods (2), the two fabric spreading rods (2) stretching the fabric toward their respective ends, characterized in that: A cutter (4) is provided at the gap between the two ends of the spreading rod (2). A transmission component is provided on the base (3) so that the cutting edge of the cutter (4) can flatten the fabric at the contact position when cutting the fabric. The angle between the tangent line of the cutting edge of the cutter (4) and the two tangent lines of the spreading rod (2) on both sides that are close to each other is no greater than 10 degrees.

2. The auxiliary fabric cutting mechanism of the circular knitting machine fabric spreading frame according to claim 1, characterized in that: The transmission assembly includes a slider (5), a bracket (6), a roller (7), a variable diameter cam (8), and a drive motor (9). The drive motor (9) is fixedly mounted on the base (3), and its output end is coaxially fixed with the variable diameter cam (8). The bracket (6) is fixedly connected to the base (3). An opening (51) is integrally formed on the bracket (6) to guide the slider (5) through it to slide. One end of the slider (5) is rotatably connected to the roller (7) that rolls along the surface of the variable diameter cam (8). The other end of the slider (5) is connected to a cutter (4).

3. The auxiliary fabric cutting mechanism of the large circular knitting machine fabric spreading frame according to claim 2, characterized in that: The slider (5) is rotatably connected to the cutter (4) at one end through the opening (51). The cutter (4) is integrally formed with a guide part (41) that can be inserted into the opening (51). When the slider (5) slides along the opening (51), the cutter (4) swings back and forth around the rotation axis of the slider (5).

4. The auxiliary fabric cutting mechanism of the large circular knitting machine fabric spreading frame according to claim 3, characterized in that: The drive motor (9) rotates in one direction, and the diameter of the variable diameter cam (8) increases smoothly in one direction along the direction of its rotation driven by the drive motor (9) to a complete circle. The maximum difference in the diameter of the variable diameter cam (8) is less than or equal to 1 cm.

5. The auxiliary fabric cutting mechanism of the large circular knitting machine fabric spreading frame according to claim 4, characterized in that: The variable diameter cam (8), slider (5) and roller (7) are all made of impact-resistant material.

6. The auxiliary fabric cutting mechanism of the circular knitting machine fabric spreading frame according to claim 1, characterized in that: The base (3) is close to the outer end face of the blade (4) and is parallel to the tangent line of the blade (4) cutting the fabric when the blade (4) slides to the limit position of the stroke. At this time, the distance between the blade (4) and the end face is less than or equal to 0.5 cm.

7. The auxiliary fabric cutting mechanism of the circular knitting machine fabric spreading frame according to claim 1, characterized in that: It also includes an adjustment motor (1), which is fixedly mounted on the base (3). The output end of the adjustment motor (1) can be used to drive the two spreading rods (2) to swing symmetrically with the cutter (4).

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