JP2019002101A - Latch needle - Google Patents

Abstract

To provide a latch needle which can make lubricating oil prevail by controlling a flow of the lubricating oil in use.SOLUTION: In a latch needle 10 having a needle stem 20 which can be attached slidably to a shuttle groove 55 of a knitting machine, the needle stem 20 comprises a rearing part 40 facing to the slide direction D of the latch needle 10. A shell-like convex part 41 standing out to the slide direction D of the latch needle 10 is formed to the rearing part 40.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a knitted needle that is slidably attached to a hook groove of a knitting machine.

  This type of knitted needle (such as a whisker needle or a latch needle) has a needle stem that is slidably attached to a hook groove of a knitting machine. The shape of the needle stem has been developed into a shape in which a notch is provided in the plate needle in consideration of prevention of breakage, knitting speedup, power saving, and the like (see, for example, Patent Document 1).

  According to the knitted needle having such a shape, the needle stem portion can be provided with a spring property, so that the needle tip can be prevented from being damaged. Further, since the contact area with the hook groove is reduced, it is possible to reduce the movement resistance when the needle stem portion reciprocally slides. Since the movement resistance is reduced, heat generation and energy consumption during sliding can be suppressed, so that the knitting speed can be increased and the power can be saved.

  In a knitting machine using such a knitted needle, lubricating oil is supplied to the hook groove by an oil supply device during operation. By supplying the lubricating oil in this way, it is possible to further reduce the movement resistance when the needle stem portion reciprocally slides.

  Patent Document 2 discloses a configuration in which a recess is formed in the needle stem and oil supplied from an oil supply device is concentrated in the recess. In this configuration, since oil is gradually introduced into the guide path of the cam, the entire cam guide path can be covered with an oil film, and oil can be introduced between the needle side surface and the needle groove. ing.

JP 9-310255 A JP-A-5-195394

  However, in the configuration described in Patent Document 2 described above, since there is no means for guiding the lubricating oil accumulated in the recess, it is difficult to stably distribute the lubricating oil by reciprocating sliding of the knitted needle.

  That is, when the knitted needle slides, the lubricating oil stored in the concave portion tends to stay in place due to viscosity, so that the lubricating oil hits the rising wall of the concave portion. However, in the configuration described in Patent Document 2 described above, since the rising wall of the recess is perpendicular to the sliding direction of the knitted needle, it acts to block the flow of the lubricating oil, and the flow of the lubricating oil is stagnant. There was a problem that. In addition, since it is not possible to control in which direction the lubricating oil that hits the wall flows, there is a possibility that the flow of the lubricating oil is not constant and the intended lubricating effect cannot be obtained.

  Then, this invention makes it a subject to provide the knitted needle which can control the flow of lubricating oil and can distribute lubricating oil at the time of use.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

  The invention according to claim 1 is a knitted needle having a needle stem portion slidably attached to a hook groove of a knitting machine, the needle stem portion including a rising portion facing a sliding direction of the knitted needle, The rising portion is formed with a bullet-like convex portion protruding in the sliding direction of the knitted needle.

  The invention described in claim 2 is characterized in that, in addition to the feature of the invention described in claim 1, the convex portion is formed as a curved surface that is convex with respect to the sliding direction of the knitted needle. And

  The invention described in claim 3 is characterized in that, in addition to the feature of the invention described in claim 1 or 2, a concave portion that is curved and continuous with the convex portion is formed in the corner of the rising portion. It is characterized by being.

  The invention described in claim 4 is characterized in that, in addition to the feature of the invention described in claim 3, the concave portion is depressed in the width direction of the needle stem portion.

  The invention according to claim 5 is provided with a plurality of the rising portions in addition to the features of the invention according to any one of the first to fourth aspects, and the convex portions are formed on all the rising portions. It is characterized by that.

  In addition to the features of the invention described in any one of claims 1 to 5, the invention described in claim 6 is a bullet-like shape protruding in the sliding direction of the knitted needle at the rear end portion of the knitted needle. The convex part is formed.

  The invention described in claim 7 is characterized in that, in addition to the feature point of the invention described in any one of claims 1 to 6, the convex portions are formed on both sides of the rising portion.

  The invention according to claim 1 is as described above, wherein the needle stem portion includes a rising portion facing the sliding direction of the knitted needle, and the protruding portion has a bullet-like convex portion protruding in the sliding direction of the knitted needle. Is formed. According to such a configuration, the lubricating oil can be guided by the convex portion in the knit needle provided with the notch portion. That is, when the knitting needle slides back and forth, the lubricating oil accumulated in the notch portion acts so as to be pressed against the wall (rising portion) of the notch portion, but the pressed lubricating oil flows by the convex portion. Is controlled and guided in the intended direction. At this time, since the convex portion is bullet-shaped, the flow of the lubricating oil is divided above and below the convex portion, so that the lubricating oil can be spread over the entire needle stem portion.

  By spreading the lubricating oil in this way, the frictional resistance between the members can be reduced, and the wear and damage of the knitted needle can be suppressed. In addition, since the driving torque is reduced by being in a good lubricating state, power saving can be realized. Moreover, heat generation can be suppressed even when the vehicle is operated at high speed.

  The invention according to claim 2 is as described above, and the convex portion is formed as a curved surface that is convex with respect to the sliding direction of the knitted needle. According to such a configuration, since the lubricating oil tends to flow along a convex curved surface (Coanda effect), the flow of the lubricating oil can be stably controlled.

  The invention according to claim 3 is as described above, and a concave portion that is curved and continuous with the convex portion is formed at the corner of the rising portion. According to such a structure, the lubricating oil induced | guided | derived to the convex part can be accumulated in a recessed part, and lubricating oil can be spread over the whole needle stem part.

  The invention according to claim 4 is as described above, and the recess is depressed in the width direction of the needle stem. According to such a configuration, a large amount of lubricating oil can be stored in the recess. Further, the lubricating oil can be spread widely in the width direction of the needle stem.

  Further, the invention according to claim 5 is as described above, and a plurality of rising portions are provided, and convex portions are formed on all rising portions. According to such a configuration, even when the total length of the knitted needle is long, the lubricating oil can be spread over the entire needle stem.

  The invention according to claim 6 is as described above, and a bullet-like convex portion protruding in the sliding direction of the knitted needle is formed at the rear end portion of the knitted needle. According to such a configuration, the lubricating oil can be spread from the rear side.

  The invention according to claim 7 is as described above, and the convex portions are formed on both sides of the rising portion. According to such a configuration, the lubricating oil can be guided by any one of the convex portions on both sides, regardless of the sliding direction of the knitted needle.

(A) Side view of knitted needle, (b) A part enlarged view. (A) The figure explaining the flow of the lubricating oil in the knitted needle of this invention, (b) The figure explaining the flow of the lubricating oil in the conventional knitted needle. (A) A side view of a knitted needle according to Modification 1, and (b) an enlarged view of a B portion. It is the side view of the (a) knitted needle concerning the modification 2, (b) C section enlarged view. It is (a) a side view of a knitting needle concerning modification 3, and (b) D section enlarged drawing. It is the side view of the (a) knitted needle concerning the modification 4, (b) E section enlarged view. It is explanatory drawing of the state which has arranged the knitted needle in the hook groove.

  Embodiments of the present invention will be described with reference to the drawings.

  The knitted needle 10 according to the present embodiment is used by being attached to a cylinder of a knitting machine, and knits the fabric by sliding in the longitudinal direction (left-right direction in FIG. 1). For example, as shown in FIG. 7, the knitting machine includes a cam block 57 that reciprocates along the opening edge (the hook wall 56) of the hook groove 55 in which the knitted needle 10 is disposed. The knitted needle 10 is fixed to the cam block 57 and slides integrally with the cam block 57. The cam block 57 is provided with an oil supply port 58 for supplying lubricating oil from the outside, and the lubricating oil is supplied to the upper surface of the knitted needle 10 through the oil supply port 58. .

In the following description, the width direction W of the needle stem 20 is a direction orthogonal to the sliding direction D of the knitted needle 10, as shown in FIG. In the direction perpendicular to the rotation axis 11a. Further, when viewed in the width direction W of the needle stem 20, the direction in which the spatula 11 opens (upward in FIG. 1) is “upward”, and the direction in which the spatula 11 closes (downward in FIG. 1) is “downward”. Will be described. Further, as viewed in the sliding direction D of the knitted needle 10, the side on which the spatula 11 is attached will be described as “front” and the opposite side as “rear”.
As shown in FIG. 1A, the knitted needle 10 includes a needle body 12 and a spatula 11.

  The spatula 11 is attached to the tip of the needle body 12 so as to be pivotable via a pivot shaft 11a. When the spatula 11 rotates in the closing direction, the tip of the spatula 11 is configured to cover the tip of a hook 13 described later. In the present embodiment, the latch needle provided with the spatula 11 will be described as an example. However, the present invention is not limited to the latch needle but can be applied to other knitted needles 10 such as a slide needle and a whisker needle.

  The needle body 12 includes a hook 13 and a needle stem portion 20. The needle body 12 has a hook 13 formed by stamping and forming a metal plate and then plastic working the tip. The needle stem 20 is a plate having a constant thickness, and is slidably attached to the hook groove 55 of the knitting machine.

As shown in FIG. 1A, the needle stem portion 20 is formed long in the sliding direction D of the knitted needle 10. Also, alternate notch shapes (lower notch 21 and upper notch 22) are formed vertically. Note that the notch shape is not necessarily provided alternately in the vertical direction, and the notch shape may be provided so as to be adjacent in the upward direction or the downward direction. Further, the notch shape is not necessarily plural, and only one notch shape may be formed.
The needle stem 20 described above includes a lower trunk 30, an upper trunk 35, a cam engagement portion 38, and a rising portion 40.

  For example, in the present embodiment, as shown in FIG. 1A, the lower trunk portion 30 is provided so as to be continuous behind the hook 13. Further, a rising portion 40 is provided so as to continue upward from the rear end of the lower trunk portion 30. Further, an upper trunk portion 35 is provided so as to continue backward from the upper end of the rising portion 40. A rising portion 40 is provided so as to continue downward from the rear end of the upper trunk portion 35. As described above, the lower trunk portion 30 and the upper trunk portion 35 are provided alternately in the width direction W of the needle stem portion 20, and the rising portion 40 is provided so as to connect the lower trunk portion 30 and the upper trunk portion 35. It has been. In other words, the lower trunk portion 30, the upper trunk portion 35, and the rising portion 40 are provided so as to be continuous with substantially the same width. In this manner, the needle stem portion 20 is formed in a zigzag shape, so that the needle stem portion 20 has a spring property.

  The lower trunk portion 30 is a portion that is installed in a state where the back surface 31 (lower surface) thereof is in contact with the hook bottom 55a of the hook groove 55 of the knitting machine. A back surface 31 of the lower trunk 30 is formed in parallel with the sliding direction D of the knitted needle 10. The needle stem 20 according to the present embodiment includes a plurality of lower stems 30 in the sliding direction D of the knitted needle 10, and a lower notch 21 that opens downward is provided between the plurality of lower stems 30. ing.

  The upper surface of the lower trunk portion 30 (the surface on the opposite side when viewed from the back surface 31) is configured to face the upper cutout portion 22 that opens upward. For this reason, when the needle stem 20 is disposed in the hook groove 55 of the knitting machine, a space is formed by the upper notch 22 on the upper side of the lower trunk 30. Lubricating oil can be stored in this space.

  Further, in the present embodiment, the upper surface of the lower trunk portion 30 forms a horizontal portion 32 and an inclined portion 33 as shown in FIG. The horizontal portion 32 is a surface formed in parallel with the sliding direction D of the knitted needle 10. The inclined portion 33 is a surface that is formed slightly inclined with respect to the sliding direction D of the knitted needle 10. The inclined portion 33 is formed between the horizontal portion 32 and the rising portion 40, and is inclined so that the width of the lower trunk portion 30 gradually becomes narrower from the horizontal portion 32 toward the rising portion 40.

  The upper trunk portion 35 is a portion disposed so as to face the cam block 57 that holds the knitted needle 10. The upper trunk portion 35 is formed so as to be positioned above the hook 13. The upper edge 36 of the upper trunk portion 35 is formed in parallel with the sliding direction D of the knitted needle 10. The needle stem 20 according to the present embodiment includes a plurality of upper trunks 35 in the sliding direction D of the knitted needle 10, and an upper notch 22 that opens upward between the plurality of upper trunks 35, Alternatively, a cam engagement portion 38 that protrudes upward is provided. Further, the lower surface of the upper trunk portion 35 (the surface on the opposite side when viewed from the upper edge 36) is configured to face the lower notch portion 21 that opens downward. For this reason, when the needle stem portion 20 is disposed in the hook groove 55 of the knitting machine, a space is formed by the lower notch portion 21 below the upper trunk portion 35. Lubricating oil can be stored in this space.

  As shown in FIG. 7, the cam engagement portion 38 is a protrusion for engaging with an engagement recess 57 a formed in the cam block 57 when the knit needle 10 is attached to the cam block 57 of the knitting machine. is there. The cam engaging portion 38 is formed to protrude upward from the upper edge 36 of the upper trunk portion 35.

  The rising portion 40 is provided so as to extend in the width direction W of the needle stem portion 20 so that the end portion of the lower stem portion 30 and the end portion of the upper stem portion 35 are continuous. For this reason, the side surface of the rising portion 40 is formed so as to face the sliding direction D of the knitted needle 10.

  As shown in FIG. 1B, a bullet-like convex portion 41 that protrudes in the sliding direction D of the knitted needle 10 is formed on the rising portion 40. For this reason, when the needle stem portion 20 slides in the hook groove 55, the lubricating oil accumulated in the upper notch portion 22 and the lower notch portion 21 is formed to flow along the convex portion 41. The convex portion 41 is formed as a curved surface that is convex with respect to the sliding direction D of the knitted needle 10. Since the convex part 41 is formed with a rounded curved surface, the lubricating oil tends to flow along the convex part 41 (Coanda effect), so that the flow of the lubricating oil can be controlled stably.

  Specifically, the convex portion 41 includes an R-shaped tip portion 41a, an upper guide surface 41b continuous from the upper end of the tip portion 41a, and a lower guide surface 41c continued from the lower end of the tip portion 41a. The upper guide surface 41 b and the lower guide surface 41 c are inclined in directions opposite to each other with respect to the sliding direction D of the knitted needle 10. And the front-end | tip part 41a is provided in the location where the upper guide surface 41b and the lower guide surface 41c cross | intersect, and the upper guide surface 41b and the lower guide surface 41c are connected by R shape. As shown in FIG. 1B, the angle R formed by the upper guide surface 41b and the lower guide surface 41c is 90 degrees or less.

  A concave portion 42 that is curved and continuous with the convex portion 41 is formed at the corner of the rising portion 40. For this reason, when the needle stem portion 20 slides in the hook groove 55, the lubricating oil that flows along the convex portion 41 is formed so as to accumulate in the concave portion 42. The concave portion 42 is formed at a position overlapping the lower notch portion 21 when viewed in the sliding direction D of the knitted needle 10, so that the lubrication accumulated in the concave portion 42 when the knitted needle 10 slides. Oil is guided to the lower notch 21. The recess 42 according to the present embodiment has an arc shape as shown in FIG. 1B so that a large amount of lubricating oil can be stored.

  Further, the concave portion 42 is formed to be depressed in the width direction W of the needle stem portion 20. That is, the recess 42 is continuous with the inclined portion 33 of the lower trunk 30 and is provided below the upper end of the lower trunk 30. For this reason, the concave portion 42 is formed so as to surround the lower trunk portion 30, and a large amount of lubricating oil can be stored in the concave portion 42. Further, since the width of the concave portion 42 as viewed in the width direction W of the needle stem portion 20 is increased, the lubricating oil can be spread widely in the width direction W of the needle stem portion 20.

  In the present embodiment, as shown in FIG. 1A, a plurality of rising portions 40 are provided, but convex portions 41 and concave portions 42 are formed on all the rising portions 40. According to such a configuration, even when the overall length of the knitted needle 10 is long, the lubricating oil can be guided at several places in the longitudinal direction, so that the lubricating oil can be spread over the entire needle stem portion 20.

  Further, not only the rising portion 40 but also a rear end portion 45 of the knitted needle 10 is formed with a bullet-like convex portion 46 protruding in the sliding direction D (rearward) of the knitted needle 10. The convex portion 46 is for spreading the lubricating oil from the rear side.

  According to such a configuration, the flow of the lubricating oil can be controlled to reduce the frictional resistance when the knitted needle 10 slides.

  That is, in the conventional needle stem portion 50, as shown in FIG. 2B, when the needle stem portion 50 slides in the hook groove 55, the lubricating oil supplied into the hook groove 55 hits the rising portion 51. Therefore, there was a problem that stagnation occurred in the flow or the flow was not stable. In addition, there is a problem that the lubricating oil is difficult to turn to the back side of the needle stem 50 (in the direction of the lower notch 52 in FIG. 2B).

  In this respect, according to the present embodiment, when the needle stem portion 50 slides in the hook groove 55, the lubricating oil flows along the convex portion 41. Therefore, the flow is difficult to stagnate by the rising portion 40 and flows stably. It is like that. Also, the lubricating oil can be guided evenly up and down. Further, since the lubricating oil can be stored in the concave portion 42, the lubricating oil stored in the concave portion 42 tends to flow to the lower notch portion 21. Therefore, the lubricating oil can be distributed to the lower part of the needle where the lubricating oil is difficult to turn.

  As described above, according to the present embodiment, the needle stem portion 20 includes the rising portion 40 that faces the sliding direction D of the knitted needle 10, and the rising portion 40 protrudes in the sliding direction D of the knitted needle 10. A bullet-shaped convex portion 41 is formed. According to such a configuration, in the knitted needle 10 provided with the notch portion, the convex portion 41 for guiding the lubricating oil can be provided on the wall (rise portion 40) of the notch portion. That is, when the knurled needle 10 reciprocates, the lubricating oil acts so as to be pressed against the rising portion 40, and the flow of the lubricating oil can be controlled by the convex portion 41. At this time, since the convex portion 41 has a bullet shape, the flow of the lubricating oil is divided above and below the convex portion 41. Therefore, the lubricating oil can be spread over the entire needle stem 20.

  By spreading the lubricating oil in this way, the frictional resistance between the members can be reduced, and the wear and damage of the knitted needle 10 can be suppressed. In addition, since the driving torque is reduced by being in a good lubricating state, power saving can be realized. Moreover, heat generation can be suppressed even when the vehicle is operated at high speed.

  In the embodiment according to FIG. 1 described above, the inner side surface 43 of the rising portion 40 is formed to rise vertically. However, the present invention is not limited to this. For example, as shown in FIG. 3, a bullet-like convex portion 44 that protrudes in the sliding direction D of the knitted needle 10 may be formed on the inner side surface 43 of the rising portion 40. In this way, if the convex portions 41 and 44 are formed on both sides of the rising portion 40, the lubricating oil can be guided by either of the convex portions 41 and 44 on both sides, regardless of which side the knitted needle 10 slides. it can.

  Further, in the above-described embodiment, the inclined portion 33 is provided in the lower trunk portion 30 so that the depth of the concave portion 42 (depth as viewed in the width direction W of the needle stem portion 20) is increased. Not exclusively. For example, as shown in FIG. 4, instead of the inclined portion 33, a bulging portion 34 that swells upward may be provided, and a concave portion 42 may be provided so as to surround the bulging portion 34. Even if it does in this way, it can be set as the shape where the recessed part 42 was depressed in the width direction W of the needle stem part 20. FIG.

  Further, the shape of the rear end portion 45 is not limited to the shape shown in FIG. 1, and various shapes are conceivable. For example, the shape shown in FIG. Further, as shown in FIG. 6, a recess 47 may be formed in the rear end portion 45.

DESCRIPTION OF SYMBOLS 10 Knitted needle 11 Bella 11a Rotating shaft 12 Needle body 13 Hook 20 Needle stem 21 Lower notch 22 Upper notch 30 Lower stem 31 Back 32 Horizontal part 33 Inclined part 34 Swelling part 35 Upper trunk 36 Upper edge 38 Cam engagement Joint part 40 Standing part 41 Convex part 41a Tip part 41b Upper guide surface 41c Lower guide surface 42 Concave 43 Inner side surface 44 Convex part 45 Rear end part 46 Convex part 47 Concave part 50 Conventional needle stem part 51 Standing part 52 Lower notch part 55 Hook Groove 55a Hook bottom 56 Hook wall 57 Cam block 57a Engaging recess 58 Refueling port D Sliding direction W Width direction R Angle

Claims (7)

A knitted needle having a needle stem that is slidably attached to a hook groove of a knitting machine,
The needle stem portion includes a rising portion facing the sliding direction of the knitted needle,
A knitted needle, wherein the rising portion is formed with a bullet-shaped convex portion protruding in a sliding direction of the knitted needle.   The knitted needle according to claim 1, wherein the convex portion is formed as a curved surface that is convex with respect to a sliding direction of the knitted needle.   The knitted needle according to claim 1 or 2, wherein a concave portion that is curved and continuous with the convex portion is formed at a corner of the rising portion.   The knitted needle according to claim 3, wherein the concave portion is depressed in the width direction of the needle stem portion.   The knitting needle according to any one of claims 1 to 4, wherein a plurality of the rising portions are provided, and the convex portions are formed on all the rising portions.   The knitted needle according to any one of claims 1 to 5, wherein a bullet-like convex portion protruding in a sliding direction of the knitted needle is formed at a rear end portion of the knitted needle. .   The knitted needle according to any one of claims 1 to 6, wherein the convex portions are formed on both sides of the rising portion.

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