A knitting needle type yarn cutting device

Abstract

The application relates to a knitting needle type yarn cutting device, which comprises a hook cutter, a fixed cutter and a thread pressing spring piece, the hook cutter is slidably arranged in one needle slot of a needle plate, the fixed cutter and the thread pressing spring piece are fixedly arranged on the needle plate at two sides in the width direction of the hook cutter, the fixed cutter and the thread pressing spring piece abut at two sides in the width direction of the hook cutter, the fixed cutter is located at one side of the hook cutter in the direction towards the center of the needle plate, a hook slot is arranged on the hook cutter, a cutting opening is arranged in the hook slot, a stop block is arranged on the fixed cutter, and the stop block blocks the opening of the hook slot when the hook cutter is accommodated in the needle plate. The application has the effect of reducing the probability of yarn being cut off due to being wrongly entered into the hook slot.

Description

Technical Field

[0001] This application relates to the field of flat knitting machine yarn cutting equipment, and in particular to a needle-type yarn cutting device. Background Technology

[0002] A computerized flat knitting machine is a double-needle plate-latch weft knitting machine. Its cam mechanism acts like a set of planar cams. The needle feet can enter the grooves of the cams, and by moving the cams, the needles are forced to move up and down rhythmically within the needle grooves of the needle plate. Through the actions of the needle hook and the needle latch, the yarn is knitted into fabric. During the upward movement of the needle, the loops gradually exit the needle hook, the needle latch opens, and the loops are hung on the needle bar. During the downward movement of the needle, the needle hook catches newly placed yarn and pulls it to bend into a loop. Simultaneously, the existing loops exit the needle hook, and the new loops pass through the old loops, connecting with them in series. Numerous loops are interconnected to form the knitted fabric.

[0003] Existing computerized flat knitting machines have yarn cutters at both ends of the needle plate. These cutters separate the yarn from the two pieces of knitted fabric after knitting. However, existing yarn cutters are complex in structure, expensive, and their installation on the needle plate can interfere with the operation of the yarn feeder. Therefore, our company has developed a needle-type yarn cutting device (see reference). Figure 1 The device includes a hook knife 1, a fixed knife 2, and a pressure spring 3. The hook knife 1 is slidably disposed in one of the needle grooves of the needle plate. The fixed knife 2 and the pressure spring 3 are fixedly mounted on the needle plate on both sides of the hook knife 1 in the width direction. The fixed knife 2 and the pressure spring 3 abut against both sides of the hook knife 1 in the width direction. The fixed knife 2 is located on the side of the hook knife 1 facing the center of the needle plate. The hook knife 1 has a hook groove 4, and the hook groove 4 has a cutting opening 5 on the side facing the fixed knife 2. The hook is driven to the hook knife 1 by the triangular movement of the knitting machine head. The first cutter hooks the yarn at the start. When the first cutter hooks the yarn at the end, it pulls the yarn to be cut to the fixed cutter 2 and the pressure spring 3. The yarn is then clamped and fixed by the pressure spring 3 and cut by the first cutter hook and the fixed cutter 2, thus cutting the yarn. The existing first cutter hook is mainly used to cut the yarn. There is no yarn loop in the hook groove 4, so it is impossible to set a needle tongue to block the hook groove 4. The yarn is easy to enter the hook groove 4 and be cut during knitting, which leads to the leakage of yarn in subsequent knitting, greatly increasing the probability of producing defective products. Utility Model Content

[0004] To reduce the probability of yarn accidentally entering the hook groove and being cut, this application provides a needle-type yarn cutting device.

[0005] The needle-type yarn cutting device provided in this application adopts the following technical solution:

[0006] A needle-type yarn cutting device includes a hook knife, a fixed knife, and a pressure spring. The hook knife is slidably disposed in one of the needle grooves of a needle plate. The fixed knife and the pressure spring are fixedly mounted on the needle plate on both sides of the hook knife in the width direction. The fixed knife and the pressure spring abut against both sides of the hook knife in the width direction. The fixed knife is located on the side of the hook knife facing the center of the needle plate. The hook knife has a hook groove with a cutting opening inside. A stop block is installed on the fixed knife. When the hook knife is stored in the needle plate, the stop block blocks the opening of the hook groove.

[0007] By adopting the above technical solution, by setting a stop on the fixed blade, the stop can block the opening of the hook groove when the hook blade is stored in the needle plate and not in use, thereby reducing the probability of the yarn accidentally entering the hook groove and being cut.

[0008] Optionally, the hook groove has cutting openings on both sides facing the fixed blade and the pressure spring, and a filling block is detachably installed on the hook blade at the hook groove. The filling block is installed on the hook blade to block one side of the opening of the hook groove.

[0009] By adopting the above technical solution, cutting openings are provided on both sides of the hook groove, so that the hook knife can be applied to both sides of the needle plate. The filling block can block the unused cutting openings, reducing the impact of the unused side cutting the yarn on the fixation after the yarn is cut.

[0010] Optionally, the stop block is slidably disposed on the fixed blade, and the stop block slides along the thickness direction of the fixed blade.

[0011] By adopting the above technical solution, the orientation of the stop block on the fixed blade can be changed by the sliding stop block, so that the fixed blade can also be applied to both sides of the needle plate.

[0012] Optionally, a slider is fixed on the fixed blade, a groove is provided on the stop block, the slider is slidably disposed in the groove, and positioning elements are provided at both ends of the groove along its length.

[0013] By adopting the above technical solution, the slide groove and slider facilitate the sliding of the stop on the fixed tool, and the positioning element can position the stop after the stop has slid, reducing the probability of the stop sliding during use.

[0014] Optionally, the positioning element includes a pressure block and an elastic element. The pressure block is slidably disposed in the slide groove, and the elastic element is installed between the pressure block and the bottom of the slide groove. When the slider slides to both ends of the slide groove in the length direction, the elastic element drives the pressure block to press onto the slider.

[0015] By adopting the above technical solution, the pressure block is pressed onto the slider by the elastic element, which can apply pressure to the slider after the stop block is positioned, reducing the probability of the stop block slipping during use.

[0016] Optionally, the pressure block is provided with a guide angle toward the center of the groove.

[0017] By adopting the above technical solution, the guide angle setting can drive the pressure block before the slider slides to the end of the slide groove, thereby reducing the probability that the pressure block will affect the sliding and slide to the end of the slide groove.

[0018] Optionally, the pressure spring includes a mounting part, a rotating part, and an elastic part. The mounting part is fixedly mounted on the needle plate, the rotating part is rotatably mounted on the mounting part, and the elastic part is mounted on the rotating part. The rotation of the rotating part drives the elastic part to change direction.

[0019] By adopting the above technical solution, the mounting part is used to install and fix the entire pressure spring on the needle plate, the elastic part is used to clamp the cut yarn, and the rotating part can change the orientation of the elastic part on the mounting part by rotating, so that the pressure spring can act on both ends of the needle plate, thereby improving the applicability of the pressure spring.

[0020] Optionally, a fixing component is provided between the rotating part and the mounting part. The fixing component includes a rod and a slot. There are two rods that are slidably disposed at both ends of the width direction of the rotating part. The slot is opened on the mounting part corresponding to the rod, and the rod is inserted into the slot by sliding.

[0021] By adopting the above technical solution, the setting of the fixing component can fix the position of the rotating part on the mounting part, reducing the probability of the rotating part rotating during the use of the pressure spring.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By setting a stop on the fixed blade, the stop can block the opening of the hook groove when the hook blade is stored in the needle plate and not in use, thereby reducing the probability of the yarn accidentally entering the hook groove and being cut.

[0024] 2. Cutting holes are provided on both sides of the hook groove, so that the hook knife can be applied to both sides of the needle plate. The filling block can block the unused cutting holes, reducing the impact of the unused side cutting the yarn on the fixation after the yarn is cut.

[0025] 3. The orientation of the stop on the fixed blade can be changed by sliding the stop block, so that the fixed blade can also be applied to both sides of the needle plate;

[0026] 4. The mounting part is used to install and fix the entire pressure spring on the needle plate, the elastic part is used to clamp the cut yarn, and the rotating part can change the orientation of the elastic part on the mounting part by rotating, so that the pressure spring can act on both ends of the needle plate, thereby improving the applicability of the pressure spring. Attached Figure Description

[0027] Figure 1 This is the needle-type yarn cutting device prior to the improvements described in this application.

[0028] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the hook knife in an embodiment of this application.

[0030] Figure 4 yes Figure 3 A magnified view of section A in the middle.

[0031] Figure 5 This is a schematic diagram of the fixed blade structure in an embodiment of this application.

[0032] Figure 6 yes Figure 5 A magnified view of section B in the middle.

[0033] Figure 7 This is a schematic diagram of the structure of the pressure spring sheet in an embodiment of this application.

[0034] Figure 8 yes Figure 7 A magnified view of section C.

[0035] Explanation of reference numerals in the attached drawings: 1. Hook knife; 2. Fixed knife; 3. Pressure spring; 31. Mounting part; 32. Rotating part; 33. Elastic part; 4. Hook groove; 5. Cutting opening; 6. Stop block; 7. Filling block; 8. Slider; 9. Slide groove; 10. Positioning component; 101. Pressure block; 102. Elastic component; 11. Guide angle; 12. Fixing assembly; 121. Insert rod; 122. Slot; 13. Drive assembly; 131. Mounting groove; 1311. Insertion groove; 1312. Rotating groove; 132. Rotating shaft; 1321. Rod body; 1322. Anti-detachment block; 133. Top rod; 134. Drive rod; 135. Return spring. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 2-8 This application will be described in further detail.

[0037] First, it should be noted that in the description of this application, the use of directional terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for descriptive purposes and do not indicate or imply that the device or component 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 this application. Furthermore, the use of numerical quantifiers such as "first," "second," and "third" is for descriptive purposes only and should not be construed as indicating or implying relative importance. Additionally, in this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, interference fits, transition fits, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium. Therefore, those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] This application discloses a needle-type yarn-cutting device, referring to... Figure 2 The device includes a hook knife 1 that is slidably disposed in one of the needle slots of a needle plate, a fixed knife 2 and a thread-pressing spring 3 that are fixedly mounted on the needle plate on both sides of the hook knife 1 in the width direction. Both the fixed knife 2 and the thread-pressing spring 3 have mounting through holes. A mounting rod is inserted into the needle plate, passing through the mounting through holes to mount the fixed knife 2 and the thread-pressing spring 3 onto the needle plate. The fixed knife 2 and the thread-pressing spring 3 abut against both sides of the hook knife 1 in the width direction. The fixed knife 2 is located on the side of the hook knife 1 facing the center of the needle plate. A hook groove 4 is provided, and a cutting opening 5 is provided in the hook groove 4. A stop block 6 is installed on the fixed knife 2. When the hook knife 1 is stored in the needle plate, the stop block 6 blocks the opening of the hook groove 4. By setting the stop block 6 on the fixed knife 2, when the hook knife 1 is stored in the needle plate and not in use, the stop block 6 can block the opening of the hook groove 4, thereby reducing the probability of the yarn accidentally entering the hook groove 4 and being cut. At the same time, since the stop block 6 is installed on the fixed knife 2, when the hook knife 1 starts to stitch, the stop block 6 will not affect the hook knife 1 from hooking the partially cut yarn.

[0039] Reference Figure 2 , Figure 3 and Figure 4The hook groove 4 has cutting openings 5 ​​on both sides facing the fixed knife 2 and the pressure spring 3. The hook knife 1 has a detachable filling block 7 installed at the hook groove 4. In this embodiment, the filling block 7 is adapted to the cutting opening 5 and completely fills the cutting opening 5. After the filling block 7 is installed, it is flush with the side of the hook knife 1 where the filling block 7 is installed, reducing the impact of the installation of the filling block 7 on the hook knife 1. The higher the compatibility between the filling block 7 and the cutting opening 5, the higher the production cost and the better the blocking effect. The filling block 7 is installed on the hook knife 1 by bolts to block one side of the opening of the hook groove 4. Since there is a need to cut yarn at both ends of the needle plate length direction, and the cutting direction at both ends of the needle plate length direction is different, two symmetrical models need to be produced when producing the yarn cutting device. The symmetrical yarn cutting devices cannot be used interchangeably, and the use of the yarn cutting device is too limited. However, the cutting openings 5 ​​are opened at both ends. By installing the filling block 7, the unused cutting opening 5 is blocked, reducing the impact of the cutting of the yarn by the cutting opening 5 on the unused side on the fixing of the yarn after cutting. This makes the hook knife 1 applicable to both sides of the needle plate, which is convenient for the use of the hook knife 1.

[0040] Reference Figure 2 , Figure 5 and Figure 6 The stop block 6 is slidably disposed on the fixed blade 2. The stop block 6 slides along the thickness direction of the fixed blade 2. By sliding the stop block 6, the orientation of the stop block 6 on the fixed blade 2 can be changed, so that the fixed blade 2 can also be applied to both sides of the needle plate. A slider 8 is fixed on the fixed blade 2. A groove 9 is opened on the stop block 6. The groove 9 is opened along the length direction of the stop block 6. The slider 8 is slidably disposed in the groove 9. In this embodiment, both the groove 9 and the slider 8 have T-shaped cross sections. Positioning members 10 are provided at both ends of the groove 9 along its length direction. The positioning member 10 includes a pressure block 101 slidably disposed in the groove 9 and an elastic member 102 installed between the pressure block 101 and the bottom of the groove 9. In this embodiment, the elastic member 102 is a spring. The elastic drive block 101 of component 102 slides into the slide groove 9. By squeezing the block 101, the block 101 is driven to be flush with the bottom of the slide groove. When the slider 8 slides to both ends of the slide groove 9 in the length direction, the elastic component 102 drives the block 101 to press on the slider 8. By the elastic component 102 driving the block 101 to press on the slider 8, pressure can be applied to the slider 8 after the stop 6 is positioned, reducing the probability of the stop 6 sliding during use. The block 101 has a guide angle 11 facing the center of the slide groove 9. The setting of the guide angle 11 can drive the block 101 before the slider 8 slides to the end of the slide groove 9, thereby reducing the probability of the block 101 affecting the sliding and sliding to the end of the slide groove 9.

[0041] Reference Figure 2 , Figure 7 and Figure 8The pressure spring 3 includes a mounting part 31 fixedly mounted on the needle plate, a rotating part 32 rotatably mounted on the mounting part 31, and an elastic part 33 mounted on one side of the rotating part 32 in the thickness direction. The elastic part 33 is a metal sheet with elasticity. The yarn is clamped by the elastic part 33 and the hook 1 to fix the yarn after cutting. The rotating part 32 rotates to drive the elastic part 33 to change direction. The mounting part 31 is used to install and fix the pressure spring 3 as a whole on the needle plate. The elastic part 33 is used to clamp the yarn after cutting. The setting of the rotating part 32 can change the orientation of the elastic part 33 on the mounting part 31 by rotating, so that the pressure spring 3 can act on both ends of the needle plate, thereby improving the applicability of the pressure spring 3.A fixing assembly 12 is provided between the rotating part 32 and the mounting part 31. The fixing assembly 12 includes a plug 121 and a slot 122. Two plugs 121 are slidably disposed at both ends of the rotating part 32 in the width direction. The slot 122 is opened on the mounting part 31 corresponding to the plugs 121. The plugs 121 are inserted into the slots 122 by sliding. The fixing assembly 12 can fix the position of the rotating part 32 on the mounting part 31, reducing the probability of the rotating part 32 rotating during use. A driving assembly 13 is provided between the plug 121 and the rotating part 32. The driving assembly 13 includes a mounting groove 1. 31. A rotating shaft 132, a push rod 133, a drive rod 134, and a return spring 135 are provided. A mounting groove 131 is formed on the rotating part 32. The rotating shaft 132 is fixed on the mounting part 31 and rotates and slides within the mounting groove 131. The push rod 133 is slidably disposed on the rotating part 32, with one end inserted into the mounting groove 131. There are two drive rods 134, one end of which is hinged to the end of the push rod 133 away from the insertion into the mounting groove 131. The ends of the two drive rods 134 away from the push rod 133 are respectively hinged to the insertion rod 121. The push rod 133 slides... The drive rod 134 drives the insertion rod 121 to slide. A return spring 135 is installed between the push rod 133 and the rotating part 32. The return spring 135 drives the push rod 133 to insert into the mounting groove 131 through its elastic force. When the push rod 133 extends into the mounting groove 131, the insertion rod 121 extends out of the rotating part 32 and inserts into the slot 122. The rotating shaft 132 includes a rod body 1321 and an anti-detachment block 1322. The mounting groove 131 includes an insertion groove 1311 and a rotating groove 1312. The rod body 1321 is slidably disposed in the insertion groove 1311, and the anti-detachment block 1322 is slidably disposed in the rotating groove 1312. Rod 133 extends into the rotating groove 1312 through the bottom of the rotating groove 1312. The top of the rotating groove 1312 has a rough surface. Under normal conditions, the anti-detachment block 1322 abuts against the rough surface at the top of the rotating groove 1312 due to the weight of the rotating part 32 itself. When the rotating part 32 needs to rotate, by lifting the rotating part 32, the anti-detachment block 1322 slides away from the rough surface and abuts against the top rod 133, causing the top rod 133 to slide away from the mounting groove 131. The top rod 133 drives the drive rod 134 to drive the insertion rod 121 to disengage from the slot 122. At this time, the rotating part 32 can rotate on the mounting part 31, adjusting the orientation of the elastic part 33.

[0042] The implementation principle of this application embodiment is as follows: According to the installation position of the yarn cutting device on the needle plate of the flat knitting machine, the blocking block 6 on the fixed knife 2 is adjusted to slide, the cutting opening 5 on the unused side of the hook knife 1 is installed with the filling block 7, and the orientation of the spring part 33 is adjusted by driving the rotating part 32 to rotate. After the adjustment is completed, the fixed knife 2 and the pressing spring 3 are installed on the needle plate. Then, the hook knife 1 is installed in the needle groove and the hook knife 1 is slid and stored in the needle groove so that the blocking block 6 blocks the opening of the hook groove 4, thus completing the installation of the yarn cutting device. When yarn cutting is required, the hook knife 1 is driven by the triangular device on the flat knitting machine head to hook the yarn to be cut. Then, the triangular device drives the hook knife 1 to retract the needle and cut the yarn through the cooperation of the fixed knife 2 and the hook knife 1. At the same time, the cut yarn is fixed and clamped by the hook knife 1 and the pressing spring 3, which facilitates the subsequent use of the yarn.

[0043] It should be noted that the above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this application. All technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the scope of the claims of this application.

Claims

1. A needle-type yarn cutting device, comprising a hook knife (1), a fixed knife (2), and a pressure spring (3), wherein the hook knife (1) is slidably disposed in one of the needle grooves of a needle plate, the fixed knife (2) and the pressure spring (3) are respectively fixedly mounted on the needle plate on both sides of the hook knife (1) in the width direction, the fixed knife (2) and the pressure spring (3) respectively abut against both sides of the hook knife (1) in the width direction, the fixed knife (2) is located on the side of the hook knife (1) facing the center of the needle plate, a hook groove (4) is provided on the hook knife (1), and a cutting opening (5) is provided in the hook groove (4), characterized in that: A stop (6) is installed on the fixed knife (2). When the hook knife (1) is stored in the needle plate, the stop (6) blocks the opening of the hook groove (4).

2. The needle-type yarn cutting device according to claim 1, characterized in that: The hook groove (4) has cutting openings (5) on both sides facing the fixed knife (2) and the pressure spring (3). The hook knife (1) has a filler block (7) detachably installed at the hook groove (4). The filler block (7) is installed on the hook knife (1) to block one side opening of the hook groove (4).

3. The needle-type yarn cutting device according to claim 2, characterized in that: The stop block (6) is slidably disposed on the fixed blade (2), and the stop block (6) slides along the thickness direction of the fixed blade (2).

4. The needle-type yarn cutting device according to claim 3, characterized in that: A slider (8) is fixed on the fixed blade (2), and a groove (9) is provided on the stop block (6). The slider (8) is slidably disposed in the groove (9), and positioning elements (10) are provided at both ends of the groove (9) in the length direction.

5. A needle-type yarn cutting device according to claim 4, characterized in that: The positioning element (10) includes a pressure block (101) and an elastic element (102). The pressure block (101) is slidably disposed in the groove (9). The elastic element (102) is installed between the pressure block (101) and the bottom of the groove (9). When the slider (8) slides to both ends of the length direction of the groove (9), the elastic element (102) drives the pressure block (101) to press on the slider (8).

6. A needle-type yarn cutting device according to claim 5, characterized in that: The pressure block (101) has a guide angle (11) facing the center of the slide groove (9).

7. A needle-type yarn cutting device according to claim 6, characterized in that: The pressure spring (3) includes a mounting part (31), a rotating part (32) and an elastic part (33). The mounting part (31) is fixedly mounted on the needle plate. The rotating part (32) is rotatably mounted on the mounting part (31). The elastic part (33) is mounted on the rotating part (32). The rotating part (32) rotates to drive the elastic part (33) to change direction.

8. A needle-type yarn cutting device according to claim 7, characterized in that: A fixing component (12) is provided between the rotating part (32) and the mounting part (31). The fixing component (12) includes a plug (121) and a slot (122). The plug (121) has two branches that are slidably disposed at both ends of the rotating part (32) in the width direction. The slot (122) is opened on the mounting part (31) corresponding to the plug (121). The plug (121) is inserted into the slot (122) by sliding.

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