Bell needle
The bearded needle with an oil groove along the sliding portion addresses yarn issues by reducing friction and wear, preventing fraying and breakage, and maintaining smooth operation.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- ORGAN NEEDLE CO LTD
- Filing Date
- 2024-12-27
- Publication Date
- 2026-07-09
AI Technical Summary
Conventional bearded needles used in industrial knitting machines suffer from yarn hairiness and breakage due to edges formed on the sliding surface, which are prone to occur during manufacturing or wear, especially when hard particles are present in the yarn.
The bearded needle features a sliding portion with an oil groove along the longitudinal direction to hold lubricating oil, reducing gliding resistance and maintaining a smooth surface, thereby preventing yarn fraying and breakage.
The lubricating oil in the oil groove reduces friction and wear, keeping the sliding surface smooth and preventing yarn fraying and breakage, while also ensuring the spatula operates effectively.
Smart Images
Figure 2026115270000001_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a bearded needle used by being attached to an industrial knitting machine.
Background Art
[0002] In this type of bearded needle, a hook is formed at the tip of the needle body, and the beard is rotatably attached so as to open and close the opening of the hook. The bearded needle attached to an industrial knitting machine reciprocates in the longitudinal direction, and along with this reciprocation, it is pushed by the yarn and the beard opens and closes, and the yarn is automatically knitted (see, for example, FIG. 3 of Patent Document 1).
[0003] During knitting, the yarn will slide on top of the bearded needle along the longitudinal direction of the bearded needle. In particular, the yarn slides on the surface on the side where the beard is attached (the right side surface in the bearded needle shown in FIG. 3 of Patent Document 1). If there is an edge on the sliding surface of the yarn, it will cause yarn hairiness and yarn breakage during knitting. Therefore, it is desirable that the sliding surface of the yarn be formed with a smooth surface texture so that no edge occurs.
[0004] Here, the opening edge of the groove supporting the beard is likely to generate an edge due to structural constraints, and is likely to cause hairiness and yarn breakage. For example, when the sliding surface is formed in an R shape (arch shape) as in Patent Document 2, an edge is likely to be formed at the opening edge of the groove. Also, when the sliding surface is made flat as in Patent Document 3, although it is possible to prevent the yarn from hitting the edge if the sliding surface is flat, it is impossible to prevent an edge from occurring due to an unintentional groove opening during the needle manufacturing process or during knitting.
[0005] Moreover, no matter how the shape of the bearded needle is formed, if the bearded needle is used for a long time and wears out, there is a risk that the shape will change and an edge will occur. For example, in the bearded needles disclosed in FIGS. 2 and 3 of Patent Document 3, when the shoulders on both sides wear out, eventually the worn surface may reach the opening edge of the groove and an edge may occur. Such wear becomes more prominent when hard particles (such as impurities or ceramic particles used for functionalized fibers) are contained in the yarn. [Prior art documents] [Patent Documents]
[0006] [Patent Document 1] Japanese Patent Publication No. 2007-77548 [Patent Document 2] Patent No. 3878129 [Patent Document 3] Japanese Public Gazette No. 60-32146 [Overview of the project] [Problems that the invention aims to solve]
[0007] As mentioned above, the conventional method of simply preventing the formation of edges had limitations in preventing fraying and breakage of the thread caused by its gliding. Therefore, the purpose of this disclosure is to provide a needle that can prevent fraying and breakage of the thread caused by the thread's sliding motion by a method different from the conventional method. [Means for solving the problem]
[0008] A spinning needle according to one aspect of the present disclosure is a spinning needle used attached to an industrial knitting machine, comprising a needle body having a spinning needle support groove formed in a sliding portion on which the yarn slides during knitting, and a spinning needle inserted into the spinning needle support groove and rotatably attached to the needle body, wherein the sliding portion has an oil groove formed along the longitudinal direction of the needle body that is capable of holding lubricating oil. [Effects of the Invention]
[0009] According to this disclosure, the gliding portion has an oil groove formed along the longitudinal direction of the needle body, which is capable of holding lubricating oil. Therefore, the lubricating oil held in the oil groove can reduce the gliding resistance of the thread. Thus, it is possible to prevent fraying and breakage of the thread. In addition, the lubricating oil held in the oil groove also reduces wear and damage to the needle, so the gliding surface can be kept smooth, and fraying and breakage of the thread can be prevented. [Brief explanation of the drawing]
[0010] [Figure 1] This is a perspective view of the bell. [Figure 2] (a) Side view of the lure, (b) Top view of the lure. [Figure 3] This is an enlarged view of section A in Figure 1. [Figure 4] (a) Enlarged view of section B in Figure 2, and (b) Enlarged view of section C in Figure 2. [Figure 5] (a) End view of DD in Figure 4(b), and (b) End view of EE in Figure 4(b) (with the bellows omitted). [Figure 6] This figure relates to Modification 1, and (a) is the DD end view in Figure 4(b), and (b) is the EE end view in Figure 4(b) (with the veranda omitted). [Figure 7] This figure relates to Modification 2, and (a) is the DD end view in Figure 4(b), and (b) is the EE end view in Figure 4(b) (with the bellows omitted). [Modes for carrying out the invention]
[0011] Embodiments of the present invention will be described with reference to the figures.
[0012] The knitting needle 10 according to this embodiment is used by being attached to the needle bed of an industrial knitting machine, and knits the fabric by sliding in the longitudinal direction (up and down direction in Figure 2). Although not specifically shown, the knitting machine is provided with a plurality of parallel grooves for attaching the knitting needles 10. The knitting needles 10 are slidably housed one by one in these grooves. The knitting needle 10 shown in Figure 1 is a circular knitting needle used in a circular knitting machine, but the knitting needle 10 of the present invention may also be a flat knitting needle used in a flat knitting machine.
[0013] In addition, the knitting machine includes a needle engaging portion (not shown) that engages with the bearded needle 10. When the knitting machine operates, the bearded needle 10 engaged with the needle engaging portion reciprocates in the longitudinal direction. The needle engaging portion can use a conventionally well-known structure. The bearded needle 10 may reciprocate in conjunction with the reciprocation of the needle engaging portion, or the bearded needle 10 may slide along the groove of the fixed needle engaging portion. By reciprocating the bearded needle 10 in this way, the yarn set on the knitting machine is knitted to form a fabric. Note that an oil supply port for supplying lubricating oil from the outside is provided near the needle engaging portion, and the lubricating oil is supplied to the upper surface of the bearded needle 10 through this oil supply port.
[0014] In the following description, when the bearded needle 10 is viewed in the longitudinal direction, the tip direction (downward in Fig. 2(a)) where the hook 21 is formed is referred to as the "front direction", and the opposite direction (upward in Fig. 2(a)) is referred to as the "rear direction". Also, the direction of the rotation axis 35a of the bearded 35 (left - right direction in Fig. 2(b)) to be described later is referred to as the "width direction". Further, the direction orthogonal to the above - described front - rear direction and width direction, and the opening direction of the bearded support groove 24 to be described later (left direction in Fig. 2(a)) is referred to as the "upward direction", and the opposite direction (right direction in Fig. 2(a)) is referred to as the "downward direction".
[0015] As shown in Fig. 1, the bearded needle 10 includes a needle body 11 and a bearded 35.
[0016] The needle body 11 includes a needle shank portion 12 that is slidably attached to the groove of the knitting machine, and a knitting portion 20 for knitting a knitted fabric. This needle body 11 is formed by punching a metal plate and then plastically processing the front end portion. The needle shank portion 12 is in a plate shape with a constant thickness W1 in the width direction (see Fig. 5) and is slidably attached to the kettle groove of the knitting machine.
[0017] In the needle shank portion 12 according to this embodiment, concave portions 14 are formed alternately up and down. By forming the concave portions 14 in a zigzag shape, the needle shank portion 12 has a certain spring property. Also, when the needle shank portion 12 is arranged in the kettle groove of the knitting machine, lubricating oil can be stored in the space of the concave portions 14.
[0018] In addition, a cam engaging portion 13 is formed to project upward on the needle shank portion 12. This cam engaging portion 13 is a portion that engages with the needle engaging portion (cam block) of the knitting machine when the bearded needle 10 is attached to the knitting machine. The shape for engaging with the knitting machine is not limited to the cam engaging portion 13 as shown in FIG. 1, and any shape can be used.
[0019] As shown in FIG. 3, the knitting portion 20 is a portion disposed in front of the needle shank portion 12. This knitting portion 20 protrudes from the groove of the knitting machine and knits the knitted fabric by reciprocating back and forth. The knitting portion 20 includes a hook 21, a sliding portion 22, and an inclined processing portion 29.
[0020] The hook 21 is a hook-shaped portion formed at the tip (front end) of the needle body 11. The hook 21 is for grasping the thread during knitting and is formed by being bent into a substantially J shape. The hook 21 extends upward so as to draw a semicircle, and the tip faces rearward. The inside of the hook 21 is open rearward. The opening of this hook 21 can be opened and closed by a bearded 35 described later.
[0021] The sliding portion 22 is a portion continuously provided behind the hook 21. The sliding portion 22 is a portion where the thread slides during knitting. Specifically, this sliding portion 22 is a portion between the hook 21 and the inclined processing portion 29. The surface visible when viewed from above of this sliding portion 22 is a sliding surface 22a for sliding the thread. During knitting, the thread mainly contacts and slides on this sliding surface 22a.
[0022] A bearded support groove 24 for attaching the bearded 35 is formed in this sliding surface 22a. The bearded support groove 24 is a slit formed with a certain depth and a certain width. The base end portion (the end portion on the side opposite to the tip) of the bearded 35 is inserted into this bearded support groove 24.
[0023] The aforementioned spatula 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 spatula 35 and can hold the spatula 35 by gripping it. The upper surface of the cheek portion 27, where the spatula support groove 24 is formed, is raised. In other words, the cheek portion 27 is formed to bulge upward in order to support the spatula 35. Therefore, when the sliding surface 22a is viewed in the front-rear direction, the cheek portion 27 has an undulation that bulges upward in the center. Furthermore, the pivot axis 35a of the bell 35, which will be described later, is located near the center (the highest, most raised part) of the cheek section 27 when viewed in the front-to-back direction.
[0024] A straight section 28 is provided behind the teak section 27. The straight section 28 is continuous with the teak section 27 without any steps. The upper surface of the straight section 28 has no undulations when viewed in the front-to-back direction. In other words, the upper surface of the straight section 28 is formed parallel to the front-to-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 irregularities due to the oil groove 30 described later). Also, the upper surface of the straight section 28 may be slightly inclined with respect to the front-to-back direction (however, the inclination of the upper surface of the straight section 28 is smaller than the inclination of the upper surface of the inclined machining section 29).
[0025] The gliding section 22 can be divided into the cheek section 27 and the part other than the cheek section 27 (straight section 28), based on the cheek section 27.
[0026] Furthermore, the sliding section 22 can be divided into a groove-forming section 23 (the area where the rattle bearing groove 24 is formed when viewed in the front-rear direction) and a non-groove-forming section 25 (the area where the rattle bearing groove 24 is not formed when viewed in the front-rear direction), with respect to the rattle bearing groove 24. The rattle bearing groove 24 may extend to the straight section 28 at its rear end. In other words, the groove-forming section 23 may include a part of the straight section 28.
[0027] The inclined processing section 29 is located between the sliding section 22 and the needle body 12, and is continuously positioned in the direction opposite to the tip (rear) of the sliding section 22. This inclined processing section 29 is provided to absorb and connect the difference in vertical width between the sliding section 22 and the needle body 12. That is, the sliding section 22 is set to have a relatively small vertical width in order to make the yarn loop as small as possible, while the needle body 12 is set to have a relatively large vertical width (larger vertical width than the sliding section 22) in order to ensure strength. To absorb this difference in vertical width between the two, the inclined processing section 29 is provided between them. This inclined processing section 29 has an inclined surface 29a that is inclined to connect the upper surface of the needle body 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 is gently inclined upward from the sliding surface 22a. The inclined surface 29a in this embodiment is formed by a gentle curve.
[0028] Furthermore, the boundary 22b between the hook 21 and the sliding portion 22 (see 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 the presence or absence of plastic deformation. That is, since the hook 21 is formed by plastic deformation, the plastically deformed portion can be defined as the hook 21, and the non-plastically deformed portion as the sliding portion 22.
[0029] Furthermore, the boundary 29b between the sliding section 22 and the inclined machining section 29 (see Figure 4(a)) can be defined by the vertical height of the sliding surface 22a. That is, the starting position of the inclined surface 29a of the inclined machining section 29 can be defined as the boundary 29b between the sliding section 22 and the inclined machining section 29.
[0030] The bail 35 is inserted into the bail support groove 24 described above and is rotatably mounted on the needle body 11. The pivot axis 35a of the bail 35 is provided on the cheek portion 27. The pivot axis 35a is provided to be perpendicular to the front-rear direction (longitudinal direction of the bail needle 10) and the up-down direction (depth direction of the bail support groove 24). This pivot axis 35a may be formed by crimping the surface of the cheek portion 27 inward, or by attaching a pin or the like to the cheek portion 27.
[0031] A spoon-shaped portion 35b is formed at the tip of the spatula 35. The spoon-shaped portion 35b is wider than the spatula support groove 24, so as not to enter the spatula support groove 24.
[0032] The spatula 35 is inserted near its lower end into the spatula support groove 24 and pivotally supported on the pivot shaft 35a. The upper end of the spatula 35 (spoon portion 35b) rotates back and forth, allowing it to move toward and away from the hook 21. Specifically, when the spatula 35 rotates forward, the spoon portion 35b contacts the tip of the hook 21, closing the opening of the hook 21. When the spatula 35 rotates backward, the spoon portion 35b contacts the sliding surface 22a, opening the opening of the hook 21. When the spatula 35 is open in this way, the thread can enter the inside of the hook 21. The spatula 35 opens and closes automatically in response to the thread during knitting.
[0033] Although not described in detail in this specification, a seating portion may be formed on the opening edge of the spatula support groove 24 of the needle body 11. The seating portion is a recess on which the back surface of the spoon portion 35b sits when the spatula 35 is open (rotated backward). This seating portion can be formed at the position where the back surface of the spoon portion 35b makes contact, corresponding to the shape of the back surface of the spoon portion 35b.
[0034] Incidentally, in this embodiment, the sliding portion 22 has an oil groove 30 formed along the longitudinal 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, it is not shown in Figures 1 to 4. The shape of this oil groove 30 will be explained in detail with reference to Figure 5.
[0035] As shown in Figure 5, the sliding surface 22a of the thread (the upper surface of the sliding portion 22) has a shoulder portion 32, a flat portion 31, and an oil groove 30 formed therein.
[0036] The shoulder portion 32 is a part provided at both ends of the sliding surface 22a when viewed in the width direction. This shoulder portion 32 is a part where the corner formed by the side surface 22c and the top surface (sliding surface 22a) of the sliding portion 22 has been chamfered.
[0037] The flat portion 31 is a part formed continuously on the inside of the pair of shoulder portions 32. This flat portion 31 is formed on a surface perpendicular to the depth direction (vertical direction) of the spatula support groove 24. In other words, the flat portion 31 is formed on a surface parallel to the width direction. A pair of these flat portions 31 are formed on both sides of the oil groove 30, and the pair of flat portions 31 form the same plane.
[0038] The oil groove 30 is a groove formed between a pair of flat sections 31. In the example shown in Figure 5, one oil groove 30 is formed in the center of the sliding surface 22a. The oil groove 30 extends in the front-rear direction to a constant depth.
[0039] As shown in Figure 5(a), the oil groove 30 comprises a pair of inclined portions 30a and a concave portion 30b provided between the pair of inclined portions 30a. The inclined portions 30a have an R-shaped cross-section that bulges upward. By providing these inclined portions 30a, no edge is formed at the opening edge of the oil groove 30. The concave portion 30b has an R-shaped cross-section that bulges downward. The concave portion 30b is formed with a larger radius than the inclined portions 30a. Furthermore, the concave portion 30b is formed with a longer ridge than the inclined portions 30a.
[0040] The depth (H) of the oil groove 30 is 0.05 mm or less, preferably 0.03 mm or less, and even more preferably 0.01 mm or less. To reduce the possibility of twisting in the sliding part 22, it is desirable to make the oil groove 30 as shallow as possible. Even if the oil groove 30 is shallow, a small clearance is created between the sliding surface 22a and the thread, so the effect of retaining lubricating oil is still achieved.
[0041] Furthermore, the width (W3) of the oil groove 30 is 30% to 70% of the thickness (W1) of the needle body 11 when viewed in the direction of the pivot axis 35a of the baffle 35 (width direction), and preferably 40% to 55%. By setting the width of the oil groove 30 within this range, the width of the flat portion 31 can be secured on both sides of the oil groove 30. By leaving sufficient flat portion 31, the thread slides over this flat portion 31. In other words, even when an oil groove 30 is provided, the thread can slide by making contact with the surface, thus suppressing fraying and breakage of the thread. In addition, since 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 thread slides, further preventing fraying and breakage.
[0042] Furthermore, it is desirable that the width (W2) of the sliding portion 22, excluding the shoulder portion 32, be 70% or more of the thickness (W1) of the needle body 11 when viewed in the direction of the rotation axis 35a (width direction) of the bell 35. By setting it in this way, the width of the flat portion 31 can be secured.
[0043] As shown in Figure 5(a), the oil groove 30 is formed in at least a part of the non-groove-forming portion 25. In this embodiment, the oil groove 30 is formed over the entire non-groove-forming portion 25 behind the bellows support groove 24. By forming the oil groove 30 in the non-groove-forming portion 25 in this way, the lubricating oil is reliably retained.
[0044] Furthermore, as shown in Figure 5(b), the oil groove 30 may be formed not only in the non-groove-forming portion 25 but also in the groove-forming portion 23. That is, the oil groove 30 may be formed in at least a part of both the groove-forming portion 23 and the non-groove-forming portion 25. In this embodiment, the oil groove 30 is formed over the entire groove-forming portion 23.
[0045] When oil grooves 30 are formed in the groove-forming section 23 and the non-groove-forming section 25, these oil grooves 30 may be continuous across the groove-forming section 23 and the non-groove-forming section 25. That is, the oil grooves 30 in the groove-forming section 23 and the oil grooves 30 in the non-groove-forming section 25 may be continuous without any steps. By making the oil grooves 30 continuous, the lubricating oil can be distributed evenly. In this case, as shown in Figures 5(a) and 5(b), the cross-sectional shape of the oil grooves 30 in the groove-forming section 23 and the cross-sectional shape of the oil grooves 30 in the non-groove-forming section 25 may be the same except for the bellows support groove 24.
[0046] In the example shown in Figure 5(b), the oil groove 30 is formed in the center of the sliding portion 22, so the oil groove 30 and the slat support groove 24 overlap. In this embodiment, in order to provide the oil groove 30 in the groove forming portion 23, the width (W3) of the oil groove 30 must be made larger than the width (W4) of the slat support groove 24. In this embodiment, a part of the oil groove 30 (inclined portion 30a) is formed at the edge of the slat support groove 24. In other words, an inclined portion 30a that slopes toward the slat support groove 24 is provided. With this configuration, the lubricating oil held in the oil groove 30 can easily flow into the slat support groove 24. As the lubricating oil flows into the slat support groove 24, friction when the slat 35 rotates is reduced.
[0047] Furthermore, it is desirable that the oil groove 30 be formed in at least a part of the straight section 28. In this embodiment, the oil groove 30 is formed over the entire straight section 28. By forming the oil groove 30 in the straight section 28 in this way, the lubricating oil is reliably retained.
[0048] Furthermore, the oil groove 30 may be formed not only in the straight section 28 but also in the teak section 27. That is, the oil groove 30 may be formed in at least a part of both the straight section 28 and the teak section 27. Although not shown in the figures, in this embodiment, the oil groove 30 is formed over the entire teak section 27.
[0049] When oil grooves 30 are formed in the straight section 28 and the teak section 27, these oil grooves 30 may be continuous across the straight section 28 and the teak section 27. That is, the oil grooves 30 of the straight section 28 and the oil grooves 30 of the teak section 27 may be continuous without any steps. By making the oil grooves 30 continuous, lubricating oil can be distributed evenly. In this case, the cross-sectional shape of the oil grooves 30 of the straight section 28 and the cross-sectional shape of the oil grooves 30 of the teak section 27 may be the same except for the bellows support grooves 24.
[0050] Furthermore, the formation range of the oil groove 30 may be set from the thread sliding range. Preferably, the oil groove 30 is provided on the sliding surface 22a that is exposed when the spatula 35 hits the hook 21 and closes. For example, L2 shown in Figure 4(a) indicates the range from the position of the pivot axis 35a (center of rotation) of the spatula 35 to the boundary 29b between the sliding part 22 and the inclined processing part 29, when viewed in the longitudinal direction (front-to-back direction) of the needle body 11. The oil groove 30 may be formed on the sliding surface 22a in this range L2.
[0051] The oil groove 30 may also be provided on the inside of the hook 21 (the sliding surface 22a that is closed when the spatula 35 hits the hook 21 and closes). For example, L3 shown in Figure 4(a) indicates the range from the position of the pivot axis 35a (center of rotation) of the spatula 35 to the boundary 22b between the sliding part 22 and the hook 21. The sliding surface 22a in this L3 range is closed when the spatula 35 closes, so the frequency of thread sliding is less than in the L2 range. Therefore, although it has a lower priority than L2, the oil groove 30 may be formed in this L3 range. In other words, the oil groove 30 may be formed over the entire sliding part 22 shown in L1.
[0052] Furthermore, L4 shown in Figure 4(a) indicates the range of the inclined surface 29a of the inclined processing section 29. This range L4 is not a part where the thread is actively glided. Therefore, although it has a lower priority than L2, an oil groove 30 may be formed in this range L4.
[0053] As described above, according to this embodiment, the sliding portion 22 has an oil groove 30 formed along the longitudinal direction (front-to-back direction) of the needle body 11, which is capable of holding lubricating oil. Therefore, the lubricating oil held in the oil groove 30 can reduce the sliding resistance of the thread. Thus, it is possible to prevent fraying and breakage of the thread. In addition, the lubricating oil held in the oil groove 30 also reduces wear and damage to the needle 10, so the sliding surface 22a can be kept smooth, and fraying and breakage of the thread can be prevented. Furthermore, by ensuring that lubricating oil flows into the spatula support groove 24, the spatula 35 can be kept in good working order.
[0054] (Variation 1) In the embodiment described above, only one oil groove 30 was formed, but as shown in Figure 6, multiple oil grooves 40, 41 may be formed in parallel.
[0055] In the example shown in Figure 6, the sliding surface 22a of the thread (the upper surface of the sliding portion 22) has a shoulder portion 43, an outer convex portion 42a, an inner convex portion 42b, a first oil groove 40, and a second oil groove 41 formed thereon.
[0056] The shoulder portion 43 is a part provided at both ends of the sliding surface 22a when viewed in the width direction. This shoulder portion 43 is a part where the corner formed by the side surface 22c and the top surface (sliding surface 22a) of the sliding portion 22 has been chamfered.
[0057] The convex portions 42a and 42b have an R-shaped cross-section that bulges upward, and a total of four are formed parallel to each other in the front-to-back direction. All of these convex portions 42a and 42b are formed at the same height. Of the four convex portions 42a and 42b, the two outer convex portions 42a are formed in continuity with the shoulder portion 43. That is, the R-shape of the convex portion 42a and the R-shape of the shoulder portion 43 are continuous with the same radius. The two inner convex portions 42b are each formed adjacent to the corresponding outer convex portion 42a. A predetermined gap is provided between the two inner convex portions 42b.
[0058] The first oil groove 40 consists of two grooves formed on the left and right sides when viewed in the width direction. The first oil groove 40 is formed between an outer convex portion 42a and an inner convex portion 42b adjacent to this 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 along its entire length.
[0059] The second oil groove 41 is a single groove formed in the center in the width direction. The second oil groove 41 is formed between two inner convex portions 42b. The bottom surface of this second oil groove 41 is formed perpendicular to the depth direction (vertical direction) of the bellows support groove 24. In other words, the bottom surface of the second oil groove 41 is formed on a surface parallel to the width direction. The depth of the second oil groove 41 is constant along its entire length. Multiple oil grooves 40, 41 may be provided in this manner.
[0060] (Modification 2) Modification 2, as shown in Figure 7, is similar to Modification 1 described above in that multiple oil grooves 50 are formed in parallel. In the example shown in Figure 7, the sliding surface 22a of the thread (the upper surface of the sliding portion 22) has a shoulder portion 52, a flat portion 51, an oil groove 50, and a central protrusion 53 formed thereon.
[0061] The shoulder portion 52 is a part provided at both ends of the sliding surface 22a when viewed in the width direction. This shoulder portion 52 is a part where the corner formed by the side surface 22c and the top surface (sliding surface 22a) of the sliding portion 22 has been chamfered.
[0062] The flat portion 51 is a part formed continuously on the inside of the pair of shoulder portions 52. This flat portion 51 is formed on a surface perpendicular to the depth direction (vertical direction) of the bellows support groove 24. In other words, the flat portion 51 is formed on a surface parallel to the width direction. A pair of these flat portions 51 are formed on both sides of the oil groove 50, and the pair of flat portions 51 form the same plane.
[0063] The oil grooves 50 are two grooves formed between a pair of flat sections 51. The two oil grooves 50 are formed adjacent to each other on the inner side of their corresponding flat sections 51. The depth of these oil grooves 50 is constant along their entire length.
[0064] The central protrusion 53 is a portion that bulges upward and is formed at 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. The top of the central protrusion 53 may also be formed flat so as to form a plane with the flat portion 51. This central protrusion 53 is positioned between the two oil grooves 50. Multiple oil grooves 50 may be provided in this manner.
[0065] (others) This disclosure is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. For example, embodiments obtained by appropriately combining the technical means disclosed in different embodiments and modifications are also included in the technical scope of the present invention.
[0066] Furthermore, design changes associated with the realization of the spatula needle 10 may affect the shape of the oil groove 30. In such cases, the technical scope of the present invention should be interpreted based on the actual shape of the oil groove 30.
[0067] For example, in the above explanation, it was stated that the depth of the oil groove 30 is constant, and that the oil groove 30 is formed over the entire groove forming portion 23. However, if a seating portion is formed to receive the spoon portion 35b of the spatula 35, the seating portion may overlap with the oil groove 30. In such a case, the depth and extent of the oil groove 30 should be interpreted excluding the seating portion, which is not directly related to the oil groove 30. That is, even if the seating portion is continuous with the oil groove 30, the depth of the seating portion should not be interpreted as the depth of the oil groove 30. Furthermore, even if a part of the oil groove 30 is gouged out by the seating portion, it should not be interpreted that the oil groove 30 does not exist in that part. [Explanation of symbols]
[0068] 10 Bell needles 11 Needle body 12 needle cadres 13 Cam engagement part 14 recess 20 Organization Department 21 hooks 22. Sliding section 22a Sliding surface 22b Boundary 22c side 23 Groove forming part 24. Bella support groove 25 Non-groove forming part 27 Cheek area 28 Straight section 29 Inclined machining section 29a Slope 29b Boundary 30 Oil groove 30a Slope 30b concave part 31 Flat area 32 Shoulder 35 Bella 35a Rotary shaft 35b Spoon part 40 1st oil groove (oil groove) 41 2nd oil groove (oil groove) 42a, 42b Convex part 43 Shoulder 50 Oil groove 51 Flat area 52 Shoulder 53 Central protrusion W1 Needle body thickness W2 Width of the running section excluding the shoulder area W3 Oil groove width W4 Width of the support groove
Claims
1. A knitting needle used attached to an industrial knitting machine, The needle body has a ratchet support groove formed in the sliding part where the thread slides during knitting, A spatula inserted into the spatula support groove and rotatably mounted relative to the needle body, Equipped with, The sliding portion has an oil groove formed along the longitudinal direction of the needle body, which is capable of holding lubricating oil. A burrfish needle.
2. The gliding portion, when viewed in the longitudinal direction of the needle body, comprises a teak portion with a raised upper surface where the slat support groove is formed, and a straight portion with a non-raised upper surface. The oil groove is formed in at least a part of the straight section. The wrasse needle according to claim 1.
3. The gliding portion, when viewed in the longitudinal direction of the needle body, comprises a teak portion with a raised upper surface where the slat support groove is formed, and a straight portion with a non-raised upper surface. The oil groove is formed in at least a portion of the teak portion and the straight portion, The wrasse needle according to claim 1.
4. The oil groove is continuous across the teak portion and the straight portion. The wrasse needle according to claim 3.
5. The sliding portion comprises a groove-forming portion in which the spatula support groove is formed, and a non-groove-forming portion in which the spatula support groove is not formed. The oil groove is formed in at least a part of the non-groove-forming portion. The wrasse needle according to claim 1.
6. The sliding portion comprises a groove-forming portion in which the spatula support groove is formed, and a non-groove-forming portion in which the spatula support groove is not formed. The oil groove is formed in at least a part of the groove-forming portion and the non-groove-forming portion. The wrasse needle according to claim 1.
7. The oil groove is continuous across the groove-forming portion and the non-groove-forming portion. The spatula needle according to claim 6.
8. The oil groove has an inclined portion that slopes toward the spatula support groove, The spatula needle according to claim 6 or 7.
9. The sliding portion has flat portions formed on both sides of the oil groove on surfaces perpendicular to the depth direction of the spatula support groove. The wrasse needle according to claim 1.
10. When viewed in the direction of the rotation axis of the aforementioned spatula, the width of the oil groove is 30% to 70% of the thickness of the needle body. The wrasse needle according to claim 1.
11. The depth of the oil groove is 0.05 mm or less. The wrasse needle according to claim 1.
12. The oil grooves are formed in parallel, The wrasse needle according to claim 1.
13. The needle body comprises a needle shaft that is slidably mounted in a groove of the knitting machine, and an inclined section provided between the sliding section and the needle shaft. The inclined processing section includes an inclined surface that is inclined to connect the upper surface of the needle shaft and the upper surface of the sliding section. When viewed in the longitudinal direction of the needle body, the oil groove is formed in an area at least from the position of the pivot axis of the spatula to the boundary between the sliding portion and the inclined machining portion. The wrasse needle according to claim 1.