tongue hook needle
By forming an oil groove in the sliding part with a hook-shaped hook to retain lubricant, the problems of fuzzing and breakage caused by the sharp edges during yarn sliding are solved, achieving smoothness and durability of yarn sliding.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ORGAN NEEDLE CO LTD
- Filing Date
- 2025-12-02
- Publication Date
- 2026-06-30
AI Technical Summary
Existing hooks with tongues are prone to creating sharp edges during yarn sliding, leading to yarn fuzzing and breakage, especially with increased wear and tear over long-term use.
An oil groove is formed along the length of the sliding section with the hook needle to retain lubricating oil, reduce yarn sliding resistance, and reduce wear.
By maintaining lubrication, the resistance of yarn sliding is reduced, preventing yarn fuzzing and breakage, while also reducing wear on the hook needle and keeping the sliding surface smooth.
Smart Images
Figure CN122304099A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a hook-and-loop crochet needle that is installed on an industrial knitting machine. Background Technology
[0002] This type of hook needle has a hook formed at the tip of the needle body, and a latch is rotatably mounted to open and close the opening of the hook. When mounted on an industrial knitting machine, the hook needle reciprocates along its length; accompanying this reciprocating motion, the latch is pulled open and closed by the yarn, automatically knitting the yarn (e.g., see Patent Document 1). Figure 3 ).
[0003] During knitting, the yarn slides along the length of the hook with the latch. Specifically, the yarn on the side with the latch attached (Patent Document 1)... Figure 3 The yarn slides on the right side of the hook (as shown). If there are sharp edges on the sliding surface of the yarn, it will cause the yarn to pill and break during knitting. Therefore, it is preferable that the sliding surface of the yarn is formed with a smooth surface texture that does not produce sharp edges.
[0004] Here, the opening edge of the groove supporting the needle tongue is prone to sharp edges due to structural limitations, which can easily lead to fuzzing or yarn breakage. For example, when the sliding surface is formed into an arc shape (arch) as in Patent Document 2, sharp edges are easily formed at the opening edge of the groove. On the other hand, when the sliding surface is made flat as in Patent Document 3, while a flat sliding surface can prevent the yarn from hitting the sharp edges, it cannot prevent sharp edges from forming due to unintentional slotting of the needle during the manufacturing process or knitting.
[0005] Furthermore, regardless of how the hook with a tongue is shaped, there is a risk that its shape will change and sharp edges will develop as it wears down with prolonged use. For example, in Patent Document 3... Figure 2 or Figure 3 In the disclosed hook needle with tongue, if the shoulders on both sides wear down, either worn surface may reach the opening edge of the groove, creating an edge. This wear is more pronounced when the yarn contains hard particles (impurities or ceramic particles used in functional synthetic fibers, etc.).
[0006] Existing technical documents
[0007] Patent documents
[0008] Patent Document 1: Japanese Patent Application Publication No. 2007-77548
[0009] Patent Document 2: Japanese Patent No. 3878129
[0010] Patent Document 3: Japanese Statutory Publication No. 60-32146 Summary of the Invention
[0011] The problem the invention aims to solve
[0012] As mentioned above, existing methods that do not produce sharp edges have limitations in preventing yarn fuzzing and breakage that accompany yarn slippage.
[0013] Therefore, the purpose of this invention is to provide a hook with a tongue that can prevent yarn fuzzing and breakage caused by yarn slippage in a different way than before.
[0014] Solution for solving the problem
[0015] One technical solution of the present invention is a hook needle with a tongue that is installed on an industrial knitting machine and includes: a needle body, wherein a sliding portion in which the yarn slides during knitting has a needle tongue support groove; and a needle tongue that is inserted into the needle tongue support groove and is rotatably mounted on the needle body relative to the needle body, wherein an oil groove for retaining lubricating oil is formed along the length direction of the needle body in the sliding portion.
[0016] Invention Effects
[0017] In this invention, an oil groove for retaining lubricating oil is formed along the length of the needle body in the sliding section. Therefore, the lubricating oil retained in the oil groove reduces the sliding resistance of the yarn. This prevents yarn fuzzing and breakage. Furthermore, the lubricating oil retained in the oil groove also reduces wear and damage to the hook needle, thus maintaining a smooth sliding surface and further preventing yarn fuzzing and breakage. Attached Figure Description
[0018] Figure 1 It is a 3D diagram of a crochet hook with a tongue.
[0019] Figure 2 (a) is a side view of the hook with a hook tongue. Figure 2 (b) is a top view of the crochet hook with a tongue.
[0020] Figure 3 yes Figure 1 Enlarged view of part A in the image.
[0021] Figure 4 (a) is Figure 2 Enlarged view of part B in the image. Figure 4 (b) is Figure 2 Enlarged view of section C in the image.
[0022] Figure 5 (a) is Figure 4 The DD end face view in (b) Figure 5 (b) is Figure 4 The EE end face diagram in (b) (the needle tongue is omitted).
[0023] Figure 6 This is a diagram of variation 1. Figure 6 (a) is Figure 4 The DD end face view in (b) Figure 6 (b) is Figure 4 The EE end face diagram in (b) (the needle tongue is omitted).
[0024] Figure 7 This is a diagram of variation 2. Figure 7 (a) is Figure 4 The DD end face view in (b) Figure 7 (b) is Figure 4 The EE end face diagram in (b) (the needle tongue is omitted). Detailed Implementation
[0025] Embodiments of the present invention will be described with reference to the accompanying drawings.
[0026] The hook needle 10 of this embodiment is used on the needle bed of an industrial knitting machine, and is used in the length direction ( Figure 2 The fabric is woven by sliding it up and down. Although not specifically illustrated, multiple slots for mounting hooks 10 with tabs are arranged parallel to each other on the knitting machine. The hooks 10 with tabs are slidably stored one by one in the slots. Figure 1 The hook needle 10 shown is a circular knitting needle used in a circular knitting machine, but the hook needle 10 of the present invention can also be a horizontal knitting needle used in a horizontal knitting machine.
[0027] In addition, the knitting machine has a needle engagement part (not shown) that engages with the hook needle 10 with a tongue. When the knitting machine is in operation, the hook needle 10 with a tongue, which engages with the needle engagement part, reciprocates in the length direction. The needle engagement part can use a conventionally known structure. The hook needle 10 with a tongue can reciprocate in conjunction with the reciprocating motion of the needle engagement part, and the hook needle 10 with a tongue can also slide along the groove of the fixed needle engagement part. By reciprocating the hook needle 10 with a tongue in this way, yarn provided on the knitting machine is knitted into it to weave fabric. It should be noted that an oil supply port for supplying lubricating oil from the outside is provided near the needle engagement part, through which lubricating oil is supplied to the upper surface of the hook needle 10 with a tongue.
[0028] Additionally, in the following description, when viewing the hook 10 along its length, the tip direction of the hook 21 will be formed ( Figure 2 The downward direction in (a) is taken as the "forward direction", and its opposite direction is ( Figure 2 The upward direction in (a) will be explained as the "rear direction". Furthermore, the direction of the rotation axis 35a of the needle tongue 35, which will be described later, will be... Figure 2The left-right direction in (b) will be explained as the "width direction". Furthermore, the opening direction of the needle tongue support groove 24, which is orthogonal to the aforementioned front-back direction and width direction, will be described later. Figure 2 The left direction in (a) is taken as the "up direction", and its opposite direction is ( Figure 2 The right direction in (a) is explained as the "downward direction".
[0029] like Figure 1 As shown, the hook 10 with a tongue has a needle body 11 and a needle tongue 35.
[0030] The needle body 11 includes a needle shaft 12 slidably mounted in the slot of a knitting machine and a knitting section 20 for knitting fabric. The needle body 11 is formed by plastically shaping the front end after stamping a metal sheet. The needle shaft 12 has a thickness W1 in the width direction (see reference). Figure 5 A constant plate shape that can be slidably mounted in the needle cylinder groove of a knitting machine.
[0031] In this embodiment, the needle shaft 12 has staggered recesses 14. By forming the recesses 14 in a serrated shape, the needle shaft 12 has a certain springiness. In addition, when the needle shaft 12 is arranged in the needle barrel groove of the knitting machine, lubricating oil can accumulate in the space of the recesses 14.
[0032] Additionally, a cam engagement portion 13 protrudes upward from the needle shaft 12. This cam engagement portion 13 engages with the needle engagement portion (cam block) of the knitting machine when the hook needle 10 with a tongue is installed. It should be noted that the shape of engagement with the knitting machine is not limited to... Figure 1 The cam engagement part 13 shown can be any shape.
[0033] like Figure 3 As shown, the knitting section 20 is located in front of the needle shaft 12. This knitting section 20 protrudes from the slot of the knitting machine and knits the fabric through a reciprocating motion. The knitting section 20 includes a hook 21, a sliding section 22, and a tilting processing section 29.
[0034] Hook 21 is a hook-shaped portion formed at the tip (front end) of the needle body 11. Hook 21 is used to grasp the yarn during knitting and bend it into a roughly J-shape. Hook 21 is set to extend upward in a semi-circular manner, with its tip facing backward. The interior of hook 21 opens backward. The opening of hook 21 can be opened and closed by the needle latch 35, which will be described later.
[0035] The sliding section 22 is a continuous portion provided behind the hook 21. The sliding section 22 is the portion for the yarn to slide during weaving. Specifically, the sliding section 22 is the portion between the hook 21 and the inclined processing section 29. The surface of the sliding section 22, when viewed from above, becomes the sliding surface 22a for the yarn to slide. During weaving, the yarn mainly contacts and slides against this sliding surface 22a.
[0036] A pin tongue support groove 24 for mounting the pin tongue 35 is formed on the sliding surface 22a. The pin tongue support groove 24 is a slit formed with a certain depth and width. The base end (the end opposite to the top tip) of the pin tongue 35 is inserted into the pin tongue support groove 24.
[0037] The aforementioned needle tongue support groove 24 is formed in the cheek portion 27 located near the hook 21. The cheek portion 27 is the part that supports the needle tongue 35 and can clamp and hold the needle tongue 35. The cheek portion 27 is formed with a raised upper surface where the needle tongue support groove 24 is formed. In other words, the cheek portion 27 is formed to bulge upward in order to support the needle tongue 35. Therefore, when the sliding surface 22a is viewed in the front-back direction, an undulation is formed in the center of the cheek portion 27 in an upward bulge manner.
[0038] It should be noted that, when viewed in the front-to-back direction, the rotation axis 35a of the needle tongue 35, described later, is located near the center of the cheek 27 (the part that is most raised).
[0039] A straight section 28 is provided behind the cheek portion 27. The straight section 28 is continuous from the cheek portion 27 without any step difference. The upper surface of the straight section 28 is flat when viewed in the front-back direction. In other words, the upper surface of the straight section 28 is formed parallel to the front-back direction. However, the straight section 28 does not need to be flat and may have undulations when viewed in the width direction (for example, it may have unevenness formed by the oil groove 30 described later). In addition, the upper surface of the straight section 28 may be slightly inclined with respect to the front-back direction (however, the slope of the upper surface of the straight section 28 is smaller than the slope of the upper surface of the inclined processing portion 29).
[0040] If we take the cheek 27 as a reference, the sliding part 22 can be divided into the cheek 27 and the part other than the cheek 27 (the straight part 28).
[0041] Furthermore, taking the tongue support groove 24 as a reference, the sliding portion 22 can be divided into a groove-forming portion 23 (the area where the tongue support groove 24 is formed when viewed in the front-rear direction) and a non-groove-forming portion 25 (the area where the tongue support groove 24 is not formed when viewed in the front-rear direction). It should be noted that the rear end of the tongue support groove 24 may also extend into the straight portion 28. That is, the groove-forming portion 23 may also include a portion of the straight portion 28.
[0042] The inclined processing section 29 is located between the sliding section 22 and the needle shaft 12, and is continuously arranged in the opposite direction (rear) from the top of the sliding section 22. This inclined processing section 29 is provided to absorb the difference in vertical width between the sliding section 22 and the needle shaft 12. Specifically, the sliding section 22 has a relatively small vertical width to minimize yarn loops, while the needle shaft 12 has a relatively large vertical width (larger than the sliding section 22) to ensure strength. The inclined processing section 29 is provided between these two sections to absorb this difference in vertical width. This inclined processing section 29 has an inclined surface 29a that is inclined in a way that connects the upper surface of the needle shaft 12 and the upper surface of the sliding section 22. The inclined surface 29a is continuous with the rear of the sliding surface 22a and slopes gently upwards from the sliding surface 22a. In this embodiment, the inclined surface 29a is formed by a gentle curve.
[0043] It should be noted that the boundary 22b between the hook 21 and the sliding part 22 (refer to...) Figure 4 (b) can be defined by the position where the hook 21 begins to bend. For example, the boundary 22b between the hook 21 and the sliding portion 22 can be defined by whether or not there is plastic deformation. That is, since the hook 21 is formed by plastic processing, the part that is plastically deformed can be identified as the hook 21, and the part that is not plastically deformed is the sliding portion 22.
[0044] Additionally, the boundary 29b between the aforementioned sliding section 22 and the tilting processing section 29 (see reference) Figure 4 (a) can be defined by the height of the sliding surface 22a in the vertical direction. That is, the starting position of the inclined surface 29a of the inclined processing section 29 can be determined as the boundary 29b between the sliding section 22 and the inclined processing section 29.
[0045] The needle tongue 35 is inserted into the aforementioned needle tongue support groove 24 and is rotatably mounted relative to the needle body 11. The rotation axis 35a of the needle tongue 35 is provided in the cheek portion 27. The rotation axis 35a is configured to be orthogonal to the front-back direction (the length direction of the hook needle 10) and the vertical direction (the depth direction of the needle tongue support groove 24). This rotation axis 35a can be formed by riveting the surface of the cheek portion 27 to the inside, or by installing a pin or the like in the cheek portion 27.
[0046] A spoon portion 35b is formed at the tip of the needle tongue 35. The spoon portion 35b is wider than the needle tongue support groove 24 and will not enter the needle tongue support groove 24.
[0047] The lower end of the latch 35 is inserted into the latch support groove 24 and is axially supported on the rotating shaft 35a. Furthermore, the upper end (spoon portion 35b) of the latch 35 rotates back and forth, thereby allowing it to separate from / contact with the hook 21. Specifically, when the latch 35 rotates forward, the spoon portion 35b abuts against the tip of the hook 21, closing the opening of the hook 21. Conversely, when the latch 35 rotates backward, the spoon portion 35b abuts against the sliding surface 22a, opening the opening of the hook 21. Thus, when the latch 35 is open, the yarn can enter the interior of the hook 21. The latch 35 automatically opens and closes by acting on the yarn during knitting.
[0048] It should be noted that, although not described in detail in this specification, a seat support portion may also be formed at the opening edge of the needle tongue support groove 24 of the needle body 11. The seat support portion is a recess for the back side of the spoon portion 35b to sit on when the needle tongue 35 is opened (when rotated backward). This seat support portion can be formed at the position where the back side of the spoon portion 35b abuts, corresponding to the shape of the back side of the spoon portion 35b.
[0049] However, in this embodiment, the sliding section 22 has an oil groove 30 formed along the length direction (front-to-back direction) of the needle body 11, which is capable of holding lubricating oil. Since the oil groove 30 is a very shallow groove, therefore... Figures 1-4 Not shown in the text. See reference. Figure 5 The shape of the oil tank 30 is described in detail.
[0050] like Figure 5 As shown, a shoulder 32, a flat portion 31, and an oil groove 30 are formed on the sliding surface 22a (the upper surface of the sliding portion 22) of the yarn.
[0051] The shoulder 32 is the part provided at both ends of the sliding surface 22a when viewed from the width direction. The shoulder 32 is the part formed by chamfering the corner formed by the side surface 22c and the upper surface (sliding surface 22a) of the sliding part 22.
[0052] The flat portion 31 is a continuous portion formed inside the pair of shoulders 32. This flat portion 31 is formed by a surface perpendicular to the depth direction (vertical direction) of the needle tongue support groove 24. In other words, the flat portion 31 is formed by a surface parallel to the width direction. A pair of flat portions 31 are formed on both sides of the oil groove 30, and the pair of flat portions 31 form the same plane.
[0053] The oil groove 30 is a groove formed between a pair of flat portions 31. Figure 5 In the example shown, an oil groove 30 is formed in the center of the sliding surface 22a. The oil groove 30 extends with a constant depth in the front-to-back direction.
[0054] like Figure 5As shown in (a), the oil tank 30 includes a pair of inclined portions 30a and a concave portion 30b disposed between the pair of inclined portions 30a. The inclined portions 30a have an upwardly bulging arc-shaped cross-section. By providing the inclined portions 30a, no sharp edges are formed at the opening edge of the oil tank 30. The concave portion 30b has a downwardly bulging arc-shaped cross-section. The concave portion 30b is formed by an arc larger than that of the inclined portions 30a. In addition, the concave portion 30b is formed by a ridge line longer than that of the inclined portions 30a.
[0055] The depth (H) of the oil groove 30 is 0.05 mm or less, preferably 0.03 mm or less, and more preferably 0.01 mm or less. In order to reduce the possibility of twisting in the sliding part 22, it is preferable to make the oil groove 30 as shallow as possible. Even if the oil groove 30 is shallow, a small gap will be generated between the sliding surface 22a and the yarn, thus achieving the effect of retaining lubricating oil.
[0056] Furthermore, when viewed in the direction of the rotation axis 35a (width direction) of the needle tongue 35, the width (W3) of the oil groove 30 is 30% to 70% of the thickness (W1) of the needle body 11, preferably 40% to 55%. By setting the width of the oil groove 30 within such a range, the width of the flat portion 31 on both sides of the oil groove 30 can be ensured. By sufficiently preserving the flat portion 31, the yarn slides on the flat portion 31. That is, even when the oil groove 30 is provided, the yarn can be made to slide in contact with the oil groove 30 at the surface, thus suppressing the fuzzing and breakage of the yarn. Moreover, since the lubricating oil is held in the oil groove 30 adjacent to the flat portion 31, lubricating oil is supplied to the flat portion 31 as the yarn slides, thereby preventing fuzzing and breakage.
[0057] It should be noted that, when viewed from the direction of the rotation axis 35a (width direction) of the needle tongue 35, the width (W2) of the sliding portion 22, excluding the shoulder 32, is preferably 70% or more of the thickness (W1) of the needle body 11. This setting ensures the width of the flat portion 31.
[0058] like Figure 5 As shown in (a), the oil groove 30 is formed at least in a portion of the non-groove forming portion 25. In this embodiment, the oil groove 30 is formed entirely in the non-groove forming portion 25, which is located rearward of the needle tongue support groove 24. By forming the oil groove 30 in the non-groove forming portion 25 in this way, lubricating oil can be reliably retained.
[0059] In addition, such as Figure 5As shown in (b), the oil groove 30 can be formed not only on the non-groove forming portion 25, but also on the groove forming portion 23. That is, the oil groove 30 can be formed at least in a portion of both the groove forming portion 23 and the non-groove forming portion 25. In this embodiment, the oil groove 30 is formed entirely in the groove forming portion 23.
[0060] When an oil groove 30 is formed in the groove forming portion 23 and the non-groove forming portion 25, the oil groove 30 can also be continuous throughout the groove forming portion 23 and the non-groove forming portion 25. That is, the oil groove 30 in the groove forming portion 23 and the oil groove 30 in the non-groove forming portion 25 can also be continuous without any step difference. By making the oil groove 30 continuous, lubricating oil can be distributed throughout. At this time, as Figure 5 (a) and Figure 5 As shown in (b), the cross-sectional shape of the oil groove 30 of the groove forming part 23 and the cross-sectional shape of the oil groove 30 of the non-groove forming part 25 can be the same as those of the needle tongue support groove 24.
[0061] It should be noted that, in Figure 5 In the example shown in (b), since the oil groove 30 is formed in the center of the sliding portion 22, the oil groove 30 overlaps with the needle tongue support groove 24. In this manner, in order to provide the oil groove 30 in the groove forming portion 23, the width (W3) of the oil groove 30 needs to be formed to be larger than the width (W4) of the needle tongue support groove 24. In this embodiment, a portion (inclined portion 30a) of the oil groove 30 is formed in the groove of the needle tongue support groove 24. In other words, an inclined portion 30a inclined towards the needle tongue support groove 24 is provided. With this configuration, the lubricating oil held by the oil groove 30 can easily flow into the needle tongue support groove 24. The lubricating oil flowing into the needle tongue support groove 24 reduces the friction when the needle tongue 35 rotates.
[0062] Furthermore, it is preferable that the oil groove 30 is formed at least in a portion of the straight section 28. In this embodiment, the oil groove 30 is formed throughout the straight section 28. By forming the oil groove 30 in this way in the straight section 28, the lubricating oil can be reliably retained.
[0063] Furthermore, the oil groove 30 can be formed not only on the straight portion 28 but also on the cheek portion 27. That is, the oil groove 30 can be formed at least on a portion of both the straight portion 28 and the cheek portion 27. Although not specifically illustrated, in this embodiment, the oil groove 30 is formed throughout the entire cheek portion 27.
[0064] When the oil groove 30 is formed on the straight portion 28 and the cheek portion 27, the oil groove 30 can also be continuous throughout the straight portion 28 and the cheek portion 27. That is, the oil groove 30 of the straight portion 28 and the oil groove 30 of the cheek portion 27 can also be continuous without any step difference. By making the oil groove 30 continuous, the lubricating oil can be distributed throughout. At this time, the cross-sectional shape of the oil groove 30 of the straight portion 28 and the cross-sectional shape of the oil groove 30 of the cheek portion 27 can also be equal except for the needle tongue support groove 24.
[0065] Alternatively, the forming range of the oil groove 30 can be set according to the sliding range of the yarn. The oil groove 30 is preferably provided at least on the sliding surface 22a exposed when the needle tongue 35 contacts and closes with the hook 21. For example, Figure 4 L2, as shown in (a), represents the range from the position of the rotation axis 35a (rotation center) of the needle tongue 35 to the boundary 29b between the sliding portion 22 and the inclined processing portion 29 when viewed from the longitudinal direction (front-back direction) of the needle body 11. An oil groove 30 may also be formed on the sliding surface 22a within this range of L2.
[0066] It should be noted that the oil groove 30 can also be located on the inside of the hook 21 (the sliding surface 22a that is blocked when the needle tongue 35 touches the hook 21 and closes). For example, Figure 4 In (a), L3 represents the range from the position of the rotation axis 35a (rotation center) of the needle tongue 35 to the boundary 22b between the sliding part 22 and the hook 21. The sliding surface 22a in this L3 range is blocked when the needle tongue 35 is closed, therefore the yarn sliding frequency is less than in the L2 range. Therefore, although the priority is lower than L2, the oil groove 30 can still be formed in this L3 range. That is, the oil groove 30 can also be formed entirely in the sliding part 22 shown in L1.
[0067] in addition, Figure 4 In (a), L4 represents the range of the inclined surface 29a of the inclined processing section 29. This range of L4 is not a part used for actively sliding the yarn. Therefore, although the priority is lower than L2, the oil groove 30 can also be formed in this range of L4.
[0068] As described above, according to this embodiment, an oil groove 30 capable of holding lubricating oil is formed in the sliding portion 22 along the length direction (front-back direction) of the needle body 11. Therefore, by holding the lubricating oil in the oil groove 30, the sliding resistance of the yarn can be reduced. Thus, yarn fuzzing and breakage can be prevented. In addition, by holding the lubricating oil in the oil groove 30, wear and damage to the hook needle 10 are also reduced, thus the sliding surface 22a can be smoothly maintained, and yarn fuzzing and breakage can be prevented.
[0069] In addition, if lubricating oil flows into the needle tongue support groove 24, the movement of the needle tongue 35 can be well maintained.
[0070] (Variation Example 1)
[0071] In the above embodiment, only one oil tank 30 is formed, but if Figure 6 As shown, multiple oil tanks 40 and 41 can also be formed in parallel.
[0072] exist Figure 6 In the example shown, a shoulder 43, an outer convex portion 42a, an inner convex portion 42b, a first oil groove 40, and a second oil groove 41 are formed on the sliding surface 22a (upper surface of the sliding portion 22) of the yarn.
[0073] The shoulder 43 is the part provided at both ends of the sliding surface 22a when viewed from the width direction. The shoulder 43 is the part formed by chamfering the corner formed by the side surface 22c and the upper surface (sliding surface 22a) of the sliding part 22.
[0074] The convex portions 42a and 42b have upwardly bulging, arc-shaped cross-sections, and a total of four are formed parallel to the front-rear direction. These convex portions 42a and 42b are all formed at the same height. Of the four convex portions 42a and 42b, the two outer convex portions 42a are continuously formed with the shoulder 43. That is, the arc shape of the convex portion 42a and the arc shape of the shoulder 43 are continuous with the same radius. The two inner convex portions 42b are formed adjacent to their respective outer convex portions 42a. A predetermined interval is provided between the two inner convex portions 42b.
[0075] The first oil groove 40 consists of two grooves formed on the left and right sides when viewed from the width direction. The first oil groove 40 is formed between the outer convex portion 42a and the inner convex portion 42b adjacent to the outer convex portion 42a. In other words, the first oil groove 40 is a concave shape formed by the intersection of the two convex portions 42a and 42b. The depth of the first oil groove 40 is constant throughout its entire length.
[0076] The second oil groove 41 is a groove formed in the center of the width direction. The second oil groove 41 is formed between two inner convex portions 42b. The bottom surface of the second oil groove 41 is formed perpendicularly to the depth direction (vertical direction) of the needle tongue support groove 24. In other words, the bottom surface of the second oil groove 41 is formed by a surface parallel to the width direction. The depth of the second oil groove 41 is constant throughout its entire length.
[0077] Multiple oil tanks 40 and 41 can also be set up in this way.
[0078] (Variation Example 2)
[0079] like Figure 7 As shown, Modified Example 2 is similar to Modified Example 1 above, with multiple oil grooves 50 formed in parallel.
[0080] exist Figure 7In the example shown, a shoulder 52, a flat portion 51, an oil groove 50, and a central protrusion 53 are formed on the sliding surface 22a (upper surface of the sliding portion 22) of the yarn.
[0081] The shoulder 52 is the portion located at both ends of the sliding surface 22a when viewed from the width direction. The shoulder 52 is formed by chamfering the corner formed by the side surface 22c and the upper surface (sliding surface 22a) of the sliding part 22.
[0082] The flat portion 51 is a continuous portion formed inside the pair of shoulders 52. This flat portion 51 is formed by a surface perpendicular to the depth direction (vertical direction) of the needle tongue support groove 24. In other words, the flat portion 51 is formed by a surface parallel to the width direction. A pair of flat portions 51 are formed on both sides of the oil groove 50, and the pair of flat portions 51 form the same plane.
[0083] The oil groove 50 is formed between a pair of flat portions 51. The two oil grooves 50 are formed adjacent to the inner side of the corresponding flat portion 51. The depth of the oil groove 50 is constant throughout its entire length.
[0084] The central protrusion 53 is a portion that bulges upwards and maintains a constant height along its entire length. In this embodiment, the height of the central protrusion 53 is set to be equal to the height of the flat portion 51. Alternatively, the top of the central protrusion 53 may be formed flat in a manner that creates the same plane as the flat portion 51. The central protrusion 53 is disposed between the two oil grooves 50.
[0085] Multiple oil tanks (50) can also be set up in this way.
[0086] (other)
[0087] This disclosure is not limited to the embodiments described above, and various modifications can be made within the scope of the claims. For example, embodiments obtained by appropriately combining the technical means disclosed in different embodiments and variations are also included within the technical scope of this invention.
[0088] Furthermore, design changes such as the specific embodiment of the hook 10 may affect the shape of the oil trough 30. Even in such cases, the scope of the invention should be interpreted based on the actual shape of the oil trough 30.
[0089] For example, in the above description, it was stated that the depth of the oil groove 30 is constant, and that the oil groove 30 is integrally formed in the groove forming portion 23. In this case, if a seat bearing portion is formed to support the spoon portion 35b of the needle tongue 35, the seat bearing portion may overlap with the oil groove 30. In this case, the depth and extent of the oil groove 30, which does not include the seat bearing portion that is not directly related to the oil groove 30, should be interpreted. That is, even if the seat bearing portion is assumed to be continuous with the oil groove 30, the depth of the seat bearing portion should not be interpreted as the depth of the oil groove 30. Furthermore, even if a portion of the oil groove 30 is excavated using the seat bearing portion, it should not be interpreted as the absence of the oil groove 30 in that portion.
[0090] Explanation of reference numerals in the attached figures
[0091] 10: Hook with tongue; 11: Needle body; 12: Needle shaft; 13: Cam engagement part; 14: Recess; 20: Knitting part; 21: Hook; 22: Sliding part; 22a: Sliding surface; 22b: Boundary; 22c: Side surface; 23: Groove forming part; 24: Needle tongue support groove; 25: Non-groove forming part; 27: Cheek; 28: Straight part; 29: Inclined part; 29a: Inclined surface; 29b: Boundary; 30: Oil groove; 30a: Inclined part; 30b: Concave portion; 31: Flat portion; 32: Shoulder; 35: Needle tongue; 35a: Rotating shaft; 35b: Spoon portion; 40: First oil groove; 41: Second oil groove; 42a, 42b: Convex portion; 43: Shoulder; 50: Oil groove; 51: Flat portion; 52: Shoulder; 53: Central convex portion; W1: Thickness of needle body; W2: Width of sliding portion excluding shoulder; W3: Width of oil groove; W4: Width of needle tongue support groove.
Claims
1. A hook with a latch, used on an industrial knitting machine, characterized in that, have: The needle body, in which the yarn slides during knitting, has a needle tongue support groove formed in the sliding part; and The needle tongue is inserted into the needle tongue support groove and is rotatably mounted on the needle body relative to the needle body. In the sliding section, an oil groove capable of retaining lubricating oil is formed along the length direction of the needle body.
2. The hook with tongue according to claim 1, characterized in that, The sliding portion includes a cheek portion with a raised upper surface forming the needle tongue support groove when viewed from the length direction of the needle body, and a straight portion with a non-raised upper surface. The oil groove is formed at least in a portion of the straight section.
3. The hook with tongue according to claim 1, characterized in that, The sliding portion includes a cheek portion with a raised upper surface forming the needle tongue support groove when viewed from the length direction of the needle body, and a straight portion with a non-raised upper surface. The oil groove is formed at least in a portion of both the cheek and the straight portion.
4. The hook with tongue according to claim 3, characterized in that, The oil grooves are continuous, covering the cheek and the straight portion.
5. The hook with tongue according to claim 1, characterized in that, The sliding part includes a groove forming part having the needle tongue support groove and a non-groove forming part not having the needle tongue support groove. The oil groove is formed at least in a portion of the non-groove forming portion.
6. The hook with tongue according to claim 1, characterized in that, The sliding part includes a groove forming part having the needle tongue support groove and a non-groove forming part not having the needle tongue support groove. The oil groove is formed at least in a portion of both the groove-forming portion and the non-groove-forming portion.
7. The hook with tongue according to claim 6, characterized in that, The oil groove extends continuously over both the groove-forming portion and the non-groove-forming portion.
8. The hook with tongue according to claim 6 or 7, characterized in that, The oil groove has an inclined portion that slopes toward the needle tongue support groove.
9. The hook with tongue according to claim 1, characterized in that, The sliding part has flat portions on both sides of the oil groove, which are formed by a surface perpendicular to the depth direction of the needle tongue support groove.
10. The hook with tongue according to claim 1, characterized in that, When viewed from the direction of the rotation axis of the needle tongue, the width of the oil groove is more than 30% and less than 70% of the thickness of the needle body.
11. The hook with tongue according to claim 1, characterized in that, The depth of the oil tank is less than 0.05 mm.
12. The hook with tongue according to claim 1, characterized in that, The oil tanks are formed in parallel multiples.
13. The hook with tongue according to claim 1, characterized in that, The needle body has a needle shaft that can be slidably mounted in a slot of a knitting machine and an inclined processing section disposed between the sliding section and the needle shaft. The inclined processing part has an inclined surface that is inclined in a manner that connects the upper surface of the needle shaft and the upper surface of the sliding part. When viewed from the length of the needle body, the oil groove is formed at least in the range from the position of the rotation axis of the needle tongue to the boundary between the sliding portion and the inclined processing portion.