A wireless thread trimming method for a glove machine

Abstract

This invention relates to the field of flat knitting machines, specifically to a method for cutting yarn ends on a glove machine. The method includes the following steps: the hook of a hooking mechanism moves to the needle bed opening, hooks the yarn, and then lifts it to a designated height; the scissors of a scissors mechanism move to the position of the hooked yarn. During this movement, the main and auxiliary scissors cooperate to open and close the scissors, completing the yarn cutting. By actively moving the scissors and cooperating with the hook to cut the yarn, yarn cutting is achieved more easily with no yarn ends.

Description

Technical Field

[0001] This invention relates to the field of flat knitting machines, and specifically to a method for cutting the thread head of a glove machine. Background Technology

[0002] Both horizontal knitting machines and glove knitting machines can be used to knit fabrics, and their knitting principles are similar. The needle selection mechanism controls the hooks to form loops in the yarn, and the scissors and hook mechanism are used to cut the yarn. As shown in patent number CN201820387146.X, it consists of a drive device and a scissor mechanism. The drive device moves the scissor mechanism to the target position. However, this scissor mechanism only has the function of cutting the yarn, and the position and direction of the yarn end cannot be controlled after cutting.

[0003] When a horizontal knitting machine finishes knitting one section and needs to knit another section, the yarn needs to be cut to prevent the two sections from joining together. The existing scissor mechanism does not control the cut yarn after cutting, resulting in the end of the yarn being exposed outside the fabric, requiring manual processing of the end of the yarn.

[0004] The prior patent CN116815403B discloses a scissor device for a glove machine, which includes a scissor mechanism, a hooking mechanism, a moving drive mechanism, and a linear moving guide mechanism. The hooking mechanism hooks the yarn to the scissor mechanism for cutting. The scissor mechanism is relatively stationary and the yarn is cut by controlling a moving piece.

[0005] However, in the above solution, the yarn needs to be pulled up by the hook mechanism to be cut near the scissor mechanism, leaving a long yarn end that cannot be included in the glove in some cases.

[0006] The inventors conducted further research and developed a method for cutting the wires of a glove machine without a lead wire, which led to this invention. Summary of the Invention

[0007] The purpose of this invention is to provide a method for cutting yarn without a thread head in a glove machine. By actively moving the scissors, the method cooperates with the thread hook to cut the yarn, making it easier to achieve yarn-free weaving.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: A method for cutting thread without a glove head, based on the cooperation of a scissor mechanism and a hook mechanism, includes the following steps: The hook of the hooking mechanism moves to the needle bed opening, hooks the yarn, and is then lifted to the designated height; The scissors of the scissor mechanism move to the position of the hooked yarn. During the movement, the main scissors and the auxiliary scissors cooperate with each other through their respective actions to open and close the scissors, thus completing the yarn cutting.

[0009] In the prior art, the scissor mechanism is located below the needle bed opening, while the scissor mechanism involved in this method is located above the needle bed opening, so it lifts upwards after hooking the yarn.

[0010] Similarly, in the prior art, including the prior patent mentioned in the background art, the scissors themselves are stationary, and the so-called moving piece rotates relative to the stationary piece. The yarn hook needs to hook the yarn to the position of the scissors. In the above method, the scissors are actively extended to cut the yarn, and the opening and closing action of the scissors is completed during the extension process to complete the yarn cutting.

[0011] The above design makes the cut yarn ends shorter, making it easier to weave them into the inside of the glove (meaning no yarn ends are visible outside the glove).

[0012] Furthermore, both the main and auxiliary shears are housed in the shear guide seat. When the shears are driven to move from one end to the other in the guide groove of the shear guide seat, the main and auxiliary shears are restricted by the guide groove to open and then close.

[0013] In this design, since two "moving pieces" need to be set up, it would be complicated and bulky to use two sets of drive mechanisms to rotate the main scissors and the auxiliary scissors respectively. Therefore, by setting up a scissor guide seat and slotting it, the yarn cutting action can be completed simultaneously as the scissors move towards the yarn.

[0014] Furthermore, the driving ends of the main shears and the auxiliary shears are driven by the same driving mechanism, and the cutting ends of the main shears and the auxiliary shears run in different tracks in the guide groove, forming a stepped structure between the aforementioned different tracks.

[0015] By setting the main and auxiliary shears in the same guide groove and controlling their trajectory through different grooves, the yarn cutting action can be achieved by pushing the shears through the shape design of the grooves.

[0016] Furthermore, the main shear has an arc in the direction facing the secondary shear, and the cutting end of the main shear moves in the guide groove in a trajectory that first rises and then falls.

[0017] The curved design ensures that the cutting part of the main shears fits as closely as possible to the secondary shears, generating pressure on the shear blades during yarn cutting to guarantee close contact between the main and secondary shears.

[0018] Furthermore, after the yarn is cut, the scissors do not move when the thread hook releases the yarn.

[0019] Furthermore, the scissor mechanism and the hook mechanism are driven by the same set of cam mechanisms.

[0020] The hook and scissors are connected to their respective cams via their respective linkage mechanisms, and are driven by the oscillation of the cams.

[0021] Furthermore, the scissor mechanism achieves this through a return spring after the driving force is removed by the drive mechanism.

[0022] The scissors are driven by a cam mechanism when they are in operation, and reset by a return spring.

[0023] Furthermore, the main shears and the secondary shears are provided with sliding protrusions or rolling protrusions on both sides, and the sliding protrusions or rolling protrusions cooperate with their respective guide grooves.

[0024] The main and auxiliary shears only need to be able to slide in the guide groove and not be stuck in the guide groove. The sliding protrusion structure is simple, and the rolling protrusion has less friction.

[0025] Furthermore, the secondary shears are thicker than the primary shears, and the secondary shears first lower and then rise when cutting yarn.

[0026] The thickness of the secondary shears is greater than that of the main shears to ensure the rigidity of the shears in the lateral direction.

[0027] By adopting the above solution, the present invention has the following advantages compared with the prior art: Compared to existing technologies, cutting yarn by using scissors at the front results in shorter thread ends, thus avoiding situations where the thread ends are too long to be woven into the gloves. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the scissors and hook structure; Figure 2 This is a diagram illustrating the initial stage of the scissors; Figure 3 This is a diagram showing the opening of the scissors; Figure 4 This is a diagram illustrating the process of cutting thread with scissors; Figure 5 This is a schematic diagram of the scissor guide seat; Figure 6 correspond Figure 2 A schematic diagram; Figure 7 correspond Figure 3 A schematic diagram; Figure 8 correspond Figure 4 A schematic diagram; Figure 9 This is a schematic diagram of the hook resetting; Figure 10 This is a schematic diagram of the hook guide seat; Figure 11This is a schematic diagram of a hook cam; Label Explanation Main shears 1, guide protrusion 101; secondary shears 2, guide protrusion 201. 3. Scissor guide seat; 4. Guide groove; 5. Scissor shaft screw; 6. Line hook; 7. Line fork. 8. Scissor cam; 9. Scissor tension spring; 10. Line hook cam; 11. Line fork tension spring; 12. Base. Linkage mechanism 13, hook guide seat 14. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] The key feature of the glove machine's non-wire hooking and cutting method of the present invention is that the scissors actively enter the hooking area to cut the yarn. The structures described below are merely embodiments for implementing this method.

[0032] like Figure 1 As shown, the scissors and hook structure of the glove machine mainly includes scissors and hooks 6, with the scissors housed in the scissor guide seat 3. The hooks 6 and the fork 7 are spaced apart to cooperate in hooking the yarn (this feature is consistent with prior art CN116815403B; the figure shows three hooks 6 to improve hooking stability, and a hook guide seat is also provided, see reference). Figure 10 As shown, the hook 6 is used to guide the movement of the thread hook. When the thread hook 6 moves to the needle bed and hooks the yarn, it is raised to a specified height. At this time, the scissors move in the scissor guide seat 3 to approach the yarn and cut it (the shearing force between the main scissors and the secondary scissors is ensured by setting the arc in the direction of the main scissors facing the secondary scissors).

[0033] Reference to the structure and working method of scissors Figure 2-5 As shown: In the horizontally arranged scissor guide seat 3, a guide groove 4 is provided. Taking the angle in the figure as an example, the right side of the guide groove 4 is a through groove, in which a scissor shaft screw 5 is installed to connect the ends of the main scissor 1 and the auxiliary scissor 2 together. The left side of the guide groove 4 has a stepped structure, with the outer guide groove 4 having a wider opening for the main scissor 1, and the relatively inner guide groove 4 being narrower for the auxiliary scissor 2. At the same time, guide protrusions (101, 201) are provided on both sides of the middle part of the main scissor 1 and the auxiliary scissor 2 and at the location of the scissor shaft screw. The width of the guide protrusions at these two locations matches the running trajectory of their respective guide grooves 4. When the scissor shaft screw 5 is driven by the drive mechanism to move from right to left, the main scissor 1 moves upward and then downward along the outer guide groove 4, while the auxiliary scissor 2 moves more gently on the inner side, with smaller downward and upward movement amplitudes. Figure 3 The red part in the diagram represents the main scissors 1, and the purplish-red part represents the secondary scissors 2. Figure 2 This is the initial state. Figure 4 (In the shearing state).

[0034] In this process, such as Figure 6-8 The diagram shown is a schematic of the movement of the scissors in conjunction with the hook 6 (only the direction of the scissor guide seat 3 is set). Figure 2-4 Conversely, when the scissor cam 8 in the cam mechanism drives the linkage mechanism 13, the scissor shaft screw 5 located in the through slot of the scissor guide seat 3 is pushed to the right. At this time, the motion trajectory of the main scissors 1 and the auxiliary scissors 2 is... Figure 2-4 The motion trajectory shown Figure 7 Position A in the diagram represents the opening position of the scissors. Figure 8 Position B in the diagram represents the closed cutting position of the scissors, where the main scissors 1 descends and the auxiliary scissors 2 rises slightly to complete the yarn cutting. Simultaneously, a scissor tension spring 9 is installed on the scissor shaft screw 5. When the cam mechanism removes its force on the scissor shaft screw 5, the scissors will return to their original position under the action of the tension spring 9.

[0035] The hook 6 is linked to the base 12 and the cam mechanism, and is driven and reset by the hook cam 10 in the cam mechanism; while the fork 7 is reset by the fork tension spring 11.

[0036] Path reference for hook cam driving hook Figure 11 As shown, path segment a is the preparation stage for starting work; path segment b is the hook hooking the thread; path segment c is when the scissors cut the thread, during which the hook does not move; stage d is when the hook is lifted to slowly knit (so that the thread end can be placed in the tubular fabric of the previous and next knitting strokes); stage e is when the hook exits the work.

[0037] The above are merely specific embodiments of the present invention. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in the present invention are for reference only and are not absolute limitations. Any non-substantial modifications made using the present invention shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A method for cutting thread without a tang in a glove machine, based on the cooperation of a scissor mechanism and a hook mechanism, characterized in that: Includes the following steps, The hook of the hooking mechanism moves to the needle bed opening, hooks the yarn, and is then lifted to the designated height; The scissors of the scissor mechanism move to the position of the hooked yarn. During the movement, the main scissors and the auxiliary scissors cooperate with each other through their respective actions to open and close the scissors, thus completing the yarn cutting.

2. The method for cutting the thread head of a glove machine according to claim 1, characterized in that: Both the main shears and the auxiliary shears are located in the shear guide seat. When the shears are driven to move from one end to the other in the guide groove of the shear guide seat, the main shears and the auxiliary shears are restricted by the guide groove to open and then close.

3. The method for cutting the thread head of a glove machine according to claim 2, characterized in that: The driving ends of the main shears and the auxiliary shears are driven by the same driving mechanism. The cutting ends of the main shears and the auxiliary shears run in different tracks in the guide groove, and the aforementioned different tracks form a stepped structure.

4. A method for cutting the thread head of a glove machine according to claim 2 or 3, characterized in that: The main shear has an arc in the direction facing the secondary shear, and the cutting end of the main shear moves in the guide groove in a trajectory of first rising and then falling.

5. A method for cutting the thread head of a glove machine according to claim 1 or 3, characterized in that: After the yarn is cut, the scissors do not move when the thread hook releases the yarn.

6. A method for cutting the cordless thread of a glove machine according to claim 5, characterized in that: The scissor mechanism and the hook mechanism are driven by the same set of cam mechanisms.

7. A method for cutting the thread head of a glove machine according to claim 6, characterized in that: The scissors are reset by a return spring after the driving force is removed from the drive mechanism.

8. A method for cutting the thread head of a glove machine according to claim 2, characterized in that: The main shears and the secondary shears are provided with sliding protrusions or rolling protrusions on both sides, and the sliding protrusions or rolling protrusions cooperate with their respective guide grooves.

9. A scissor structure for wireless knitting of a glove machine according to claim 2 or 3, characterized in that: The secondary shears are thicker than the main shears, and they lower and then rise when cutting yarn.

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