EP2458052A2 - Compound needle for flatbed knitting machine - Google Patents
Compound needle for flatbed knitting machine Download PDFInfo
- Publication number
- EP2458052A2 EP2458052A2 EP11009237A EP11009237A EP2458052A2 EP 2458052 A2 EP2458052 A2 EP 2458052A2 EP 11009237 A EP11009237 A EP 11009237A EP 11009237 A EP11009237 A EP 11009237A EP 2458052 A2 EP2458052 A2 EP 2458052A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- needle
- slider
- tongue
- slider groove
- rearward
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 150000001875 compounds Chemical class 0.000 title claims abstract description 46
- 238000009940 knitting Methods 0.000 title claims abstract description 21
- 210000002105 tongue Anatomy 0.000 claims description 57
- 238000005452 bending Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
- D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
- D04B35/06—Sliding-tongue needles
Definitions
- the present invention relates to a compound needle for a flatbed knitting machine, the compound needle includes a needle body being put in a needle groove, the needle grooves arranged in line on a needle bed, the needle body having a hook to move to and back from a needle bed gap to which a tip end of the needle bed is faced and a slider having a tongue to open and close the hook by relative movement to the needle body.
- a flatbed knitting machine knits a fabric, while knitting needles are put in needle grooves arranged in line on a needle bed, hooks provided on front ends of the knitting needles are caused to move to and back from a needle bed gap to which a tip end of the needle bed is faced, and a knitting yarn is fed to the hooks at the needle bed gap.
- compound needles are used to open and close hooks with sliders as well as a latch needles are used to open and close hooks with latches.
- each needle bed is tilted in such a way that the needle bed gap side of the needle bed is high and the needle bed becomes lower as apart from the needle bed gap.
- the direction is determined relative to the individual needle bed in such a way that the needle bed gap side of the needle bed is the front, the side where the needle bed is apart from the needle bed gap is the back, and the direction in which the knitting needle moves in the needle groove is the longitudinal direction.
- the vertical direction is determined in such a way that the direction in which the needle bed floats in the needle groove is the upper side and the direction in which the needle bed sinks is the lower side.
- Figs. 5 show schematic structures of essential portions of a conventional compound needle 1 in a state in which the compound needle 1 is put in a needle groove (for example, see Patent Literature 1). However, structures, related to a needle bed and a needle groove, are not shown in the drawings.
- the compound needle 1 includes a needle body 2 and a slider 3.
- the slider 3 includes two blades 4 and a base body 5.
- the compound needle 1 also includes a needle jack 6.
- Main components of the compound needle 1 are formed by processing a metal plate.
- the needle body 2 has a hook 2a at the front end and a needle shank 2b subsequent to the hook 2a.
- the needle shank 2b is provided with a slider groove 2c at a middle part in a widthwise direction vertical to the paper surface.
- the slider groove 2c has a bottom surface 2d.
- a notch 2e is provided on side walls erected from both sides of the bottom surface 2d in the widthwise direction, and a fork portion 2f is formed on the upper portion of the notch 2e.
- a joining portion 2g is provided on a rear end side of the needle body 2. At least the lower portions of the blades 4 are put in the slider groove 2c of the needle body 2 with the two blades 4 laid on each other.
- a tongue 4a is provided on the front end of the blade 4, and an arm 4b is extended behind the rear side of the tongue 4a.
- a joining portion 4c is provided near the rear end of the arm 4b, and a swing stopping protrusion 4d is provided near the front end.
- the base body 5 is provided with a protrusion putting in portion 5a that puts in the swing stopping protrusion 4d of the blade 4 near the front end, and the arm 5b is extended to rearward.
- the base body 5 also has a joining portion 5c to be joined to the joining portion 4c of the blade 4, so that the blade 4 and the base body 5 are joined to each other to function as the slider 3.
- a joining portion 6a is fit into the joining portion 2g provided near the rear end of the needle body 2, the joining portion 6a being provided on the front end of the needle jack 6.
- Fig. 5(a) shows a state in which the hook opening of the hook 2a is closed with the tongue 4a.
- Fig. 5(b) shows a clearing state in which the slider 3 moves back with respect to the needle body 2 and a stitch retained on the hook 2a can be moved from the opened hook opening of the hook 2a to the tongue 4a. It is necessary that the tongue 4a be sunk in the slider groove 2c to cause no trouble such as the tongue 4a being hooked on a stitch moving back along the needle shank 2b.
- the upper portions of the blades 4 subsequent to the tongue 4a are opened on both sides in the widthwise direction to form a curving portion 4e for convenience as in receiving a stitch retained on the hook 2a by a transfer jack form above.
- the curving portion 4e is guided to the notch 2e where the fork portion 2f is faced, and the curving portion 4e is pressed downward on the lower side of the fork portion 2f to sink the tongue 4a. It is noted that the tongue 4a can move to the needle bed gap over the hook 2a in the slider 3 using two blades 4.
- Fig. 5(c) shows the cross sectional structure seen from a cutting surface line C-C in Fig. 5(b) . Since the two blades 4 are laid on each other, the curving portion 4e is opened to both sides of a center line 1a.
- the notch 2e and the fork portion 2f are provided on two side walls of the slider groove 2c provided on the needle shank 2b to press the curving portion 4e downward.
- Patent Literature 1 Japanese Patent No. 3577038
- the slider groove 2c is formed at a middle part in the widthwise direction to guide the curving portion 4e of the blade 4 to the notch 2e provided on the side wall, and the tongue 4a is sunk in the slider groove 2c at a clearing time. Since the slider groove 2c is formed by processing a groove from the top surface side of the needle body 2, the fork portion 2f is processed at the same time to be the wall in a thin plate. The blade 4 is also in a thin plate, and the underside of the fork portion 2f engages with the curving portion 4e with the thin plates.
- the width of the needle groove is also reduced, and the width of the needle body 2 that can be put in the needle groove is also reduced.
- the thickness of the side wall of the needle shank 2b and the plate thickness of the blade 4 become thin, so that it becomes difficult to contact the underside of the fork portion 2f with the top end of the curving portion 4e.
- the present invention is a compound needle for a flatbed knitting machine, comprising:
- said blade has a curving portion at said front portion, neighboring to a rearward of said tongue and opening an upper end of the blade to an outward of the slider groove,
- a front portion of said blade is formed so that said tongue and a portion neighboring to the rearward of the tongue fall within the width of said slider groove,
- the tongue is put in the clearing portion of the slider groove, in the clearing state in which the slider moves back with respect to the needle body to open the hook and the tongue receives a stitch retreating from the hook. Since the overhanging portion is formed above the clearing portion in such a way that the overhanging portion is extended from the rear side of the needle body to the front side at the width covering at least the slider groove, the sloping portion of the blade is contacted with the pressing portion provided on the under surface of the overhanging portion, and the tongue is sunk in the slider groove with a pressing force. The tongue is pressed within the width of the slider groove, so that it is possible to reliably guide the tongue to be sunk in the slider groove even though the plate thickness of the needle body becomes thin.
- the sloping portion is pressed by the pressing portion on the under surface of the overhanging portion, so that it is possible to eliminate the influence of processing on the under surface of the overhanging portion if the slider groove is processed from below the needle shank.
- the slider groove is bottomless in the clearing portion, so that it is possible that dust tends to be removed out of the inside of the slider groove and the possibility of malfunction caused by the clogging of dust is reduced.
- the arm is extended on the rearward beyond the overhanging portion, so that it is possible to form the compound needle by readily combining the needle body with the slider from above, even though the curving portion is provided subsequent to the tongue. It is possible that the tongue is pressed and sunk in the slider groove at a clearing time with the sloping portion provided on the back side near the front end of the arm and the tongue is reliably pressed within the width of the slider groove.
- the blade is not provided with the curving portion to swell outward beyond the width of the slider groove, so that it is possible to readily assemble the compound needle in which the blade is inserted forward as passing below the overhanging portion, even though the slider groove is formed on the rearward beyond the overhanging portion.
- Figs. 1 and Figs. 2 show a schematic structure of a compound needle 11 of a flatbed knitting machine according to an example of the present invention.
- Figs. 3 and Figs. 4 show a schematic structure of a compound needle 21 of a flatbed knitting machine according to another example of the present invention.
- Figs. 1 and Figs. 3 show the schematic structures of the compound needles 11, 21 according to the examples of the present invention.
- the compound needle 11 includes needle body 12 and slider 13, the slider 13 including blade 14 and base body 15.
- the compound needle 21 includes needle body 22 and slider 23, the slider 23 including blade 24 and base body 25.
- the compound needle 11 also includes a needle jack 6. Although the compound needle 21 also includes a needle jack 6 as similar to the compound needle 11, the needle jack 6 is omitted in the drawings.
- slider grooves 12c, 22c are respectively provided on needle shanks 12b, 22b subsequent to hooks 12a, 22a of the front ends.
- the slider grooves 12c, 22c have bottom surfaces 12d, 22d near the front ends respectively, the bottom surfaces 12d, 22d are not provided on the rearward, and overhanging portions 12e, 22e are formed above the slider grooves 12c, 22c so as to be overhung from the rearward.
- the overhanging portions 12e, 22e are separated downside by spaces to the top surfaces of the needle shanks 12b, 22b, on which the slider grooves 12c, 22c are formed, and pressing portions 12f, 22f are provided on the underside of the overhanging portions 12e, 22e.
- Joining portions 12g, 22g are respectively provided on the rear portions of the needle bodies 12, 22, and joined to a joining portion 6a of the needle jack 6.
- At least the lower portions of the blades 14, 24 are put in the slider grooves 12c, 22c with two blades laid on each other, in which tongues 14a, 24a are provided on the front end and arms 14b, 24b are provided behind the rearward of the tongues 14a, 24a, respectively.
- Joining portions 14c, 24c are provided near the rear end of the arm 14b, 24b and joined to joining portion 15c, 25c provided near the front ends of the arms 15b, 25b of the base body 15, 25.
- a curving portion 14e is provided subsequent to the tongue 14a.
- Sloping portions 14f, 24f are respectively provided subsequent to the tongues 14a, 24a, in which the height of the sloping portions 14f, 24f are reduced from the frontward to the rearward. These portions are provided at the top ends of the arms 14b, 24b as head portions14g, 24f of the blades 14, 24 and capable of vertically moving in the slider grooves 12c, 22c by the bending of the arms 14b, 24b, respectively.
- Fig. 1(a) and Fig. 3(a) show a state in which the hook opening of the hooks 12a, 22a are closed with the tongues 14a, 24a.
- the head portions14g, 24g of the blades 14, 24 are put in closing portions 12h, 22h of the slider grooves 12c, 22c in which the head portions 14g, 24g are floating in the slider grooves 12c, 22c by upward force from the bottom surfaces12d, 22d and the head ends of the tongues 14a, 24a contact with the tip ends of the hooks 12a, 22a to close the hook openings.
- the upper portion of the arm 14b of the compound needle 11 is inserted into an arm groove 15d provided on the base body 15, and a swing of the slider groove 12c in the widthwise direction is suppressed in this state.
- a swing stopping protrusion 24d at the front end of the arm 24b of the compound needle 21 is put in a protrusion putting in portion 25a provided at the front end of the base body 25, and a swing of the slider groove 22c in the widthwise direction is suppressed in this state. It is also possible to move the tongues 14a, 24a forward beyond the hooks12a, 22a.
- Figs. 1(b) and 3(b) show a state at a clearing time.
- the head portions 14g, 24g of the blades 14, 24 are put in clearing portions 12i, 22i of the slider grooves 12c, 22c, and the sloping portions 14f, 24f are pressed with the pressing portions 12f, 22f on the under surfaces of the overhanging portions 12e, 22e.
- the tongues 14a, 24a are sunk in the slider grooves 12c, 22c, so that stitches can smoothly move back along the needle shanks 12b, 22b, respectively.
- the arm 14b of the compound needle 11 is extended on the rearward beyond the overhanging portion 12e, it is possible to form the compound needle 11 by combining the needle body 12 with the slider 13 from above even though the curving portion 14e is provided subsequent to the tongue 14a. Since the sloping portion 14f is formed on the down side, which is the rearward beyond the front end of the arm 14b, it is possible to reliably press the sloping portion 14f with the pressing portion 12f on the under surface of the overhanging portion 12e even though the arm 14b passes over the overhanging portion 12e.
- the compound needle 21 is not provided with a portion corresponding to the curving portion 14e that swells outward beyond the width of the slider groove 22c. Consequently, in the compound needle 21, it is possible to readily assemble the blades 24 in case the blade 24 is inserted forward as passing below the overhanging portion 22e, even though the slider groove 22c is formed to the rearward beyond the overhanging portion 22e.
- Fig. 1(c) shows a cross sectional structure seen on a cutting surface line C-C in Fig. 1(b) . Since the overhanging portion 12e is formed along the entire width of the needle shank 12b, it is possible that the upper ends of the sloping portions 14f of the blades 14 in two layers are readily contacted with the overhanging portion 12e to reliably press the sloping portion 14f with the pressing portion 12f on the under surface of the overhanging portion 12e from above.
- the slider groove 12c is processed from above the needle shank 12b in the closing portion 12h, whereas the slider groove 12c is processed from below the needle shank 12b in the clearing portion 12i.
- the clearing portion 12i Since the clearing portion 12i is opened downward, it is also possible to remove dust out of the inside of the slider groove 12c in operation as a knitting needle. Also for the compound needle 21, in a cross sectional structure of the clearing portion 22i, the overhanging portion 22e is similarly formed along the entire width of the needle shank 22b, and it is possible to readily press the sloping portions 24f of the blades 24 in two layers with the pressing portions 22f. Since the slider groove 22c formed similarly to the slider groove 12c of the compound needle 11 is also opened downward in the clearing portion 22i, it is possible to readily perform processing and removal of dust.
- Figs. 2 and Figs. 4 respectively show structures of main components of the compound needles 11, 21 shown in Figs. 1 and Figs. 3 .
- Fig. 2(a) shows a structure of the blade 14 and the base body 15. On the rearward of the base body 15, the arm 15b is extended, and a butt 15e is erected to receive the drive for the slider 13.
- Fig. 2(b) shows the blade 14 and the base body 15 for the slider 13 in combination by joining the joining portions 14c, 15c to each other.
- Fig. 2(c) shows a state in which the needle body 12 and the needle jack 6 are combined. The needle body 12 performs main operations for the knitting needle with the drive to the butt 6b provided on the needle jack 6.
- Fig. 1 shows a structure of the blade 14 and the base body 15. On the rearward of the base body 15, the arm 15b is extended, and a butt 15e is erected to receive the drive for the slider 13.
- Fig. 2(b) shows
- FIG. 4(a) shows structures of the blade 24 and the base body 25.
- the arm 25b On the rearward of the base body 25 of Figs. 3 , the arm 25b is extended, and the butt is provided to receive the drive for the slider 23, however, they are omitted in the drawing.
- Fig. 4(b) shows the blade 24 and the base body 25 for the slider 23 in combination by joining the joining portions 24c, 25c to each other.
- Fig. 4(c) shows the needle body 22.
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- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Description
- The present invention relates to a compound needle for a flatbed knitting machine, the compound needle includes a needle body being put in a needle groove, the needle grooves arranged in line on a needle bed, the needle body having a hook to move to and back from a needle bed gap to which a tip end of the needle bed is faced and a slider having a tongue to open and close the hook by relative movement to the needle body.
- Conventionally, a flatbed knitting machine knits a fabric, while knitting needles are put in needle grooves arranged in line on a needle bed, hooks provided on front ends of the knitting needles are caused to move to and back from a needle bed gap to which a tip end of the needle bed is faced, and a knitting yarn is fed to the hooks at the needle bed gap. For the knitting needles, compound needles are used to open and close hooks with sliders as well as a latch needles are used to open and close hooks with latches.
- In the flatbed knitting machine, two needle beds are provided on the front and back side across the needle bed gap and are faced to each other, each needle bed is tilted in such a way that the needle bed gap side of the needle bed is high and the needle bed becomes lower as apart from the needle bed gap. In the following explanation, the direction is determined relative to the individual needle bed in such a way that the needle bed gap side of the needle bed is the front, the side where the needle bed is apart from the needle bed gap is the back, and the direction in which the knitting needle moves in the needle groove is the longitudinal direction. The vertical direction is determined in such a way that the direction in which the needle bed floats in the needle groove is the upper side and the direction in which the needle bed sinks is the lower side.
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Figs. 5 show schematic structures of essential portions of aconventional compound needle 1 in a state in which thecompound needle 1 is put in a needle groove (for example, see Patent Literature 1). However, structures, related to a needle bed and a needle groove, are not shown in the drawings. Thecompound needle 1 includes aneedle body 2 and aslider 3. Theslider 3 includes twoblades 4 and abase body 5. Thecompound needle 1 also includes aneedle jack 6. Main components of thecompound needle 1 are formed by processing a metal plate. - The
needle body 2 has a hook 2a at the front end and a needle shank 2b subsequent to the hook 2a. The needle shank 2b is provided with a slider groove 2c at a middle part in a widthwise direction vertical to the paper surface. The slider groove 2c has a bottom surface 2d. A notch 2e is provided on side walls erected from both sides of the bottom surface 2d in the widthwise direction, and a fork portion 2f is formed on the upper portion of the notch 2e. A joining portion 2g is provided on a rear end side of theneedle body 2. At least the lower portions of theblades 4 are put in the slider groove 2c of theneedle body 2 with the twoblades 4 laid on each other. A tongue 4a is provided on the front end of theblade 4, and an arm 4b is extended behind the rear side of the tongue 4a. A joining portion 4c is provided near the rear end of the arm 4b, and a swing stopping protrusion 4d is provided near the front end. Thebase body 5 is provided with a protrusion putting in portion 5a that puts in the swing stopping protrusion 4d of theblade 4 near the front end, and thearm 5b is extended to rearward. Thebase body 5 also has a joining portion 5c to be joined to the joining portion 4c of theblade 4, so that theblade 4 and thebase body 5 are joined to each other to function as theslider 3. A joining portion 6a is fit into the joining portion 2g provided near the rear end of theneedle body 2, the joining portion 6a being provided on the front end of theneedle jack 6. -
Fig. 5(a) shows a state in which the hook opening of the hook 2a is closed with the tongue 4a.Fig. 5(b) shows a clearing state in which theslider 3 moves back with respect to theneedle body 2 and a stitch retained on the hook 2a can be moved from the opened hook opening of the hook 2a to the tongue 4a. It is necessary that the tongue 4a be sunk in the slider groove 2c to cause no trouble such as the tongue 4a being hooked on a stitch moving back along the needle shank 2b. In thecompound needle 1 shown in the drawings, the upper portions of theblades 4 subsequent to the tongue 4a are opened on both sides in the widthwise direction to form a curving portion 4e for convenience as in receiving a stitch retained on the hook 2a by a transfer jack form above. InFig. 5(b) , the curving portion 4e is guided to the notch 2e where the fork portion 2f is faced, and the curving portion 4e is pressed downward on the lower side of the fork portion 2f to sink the tongue 4a. It is noted that the tongue 4a can move to the needle bed gap over the hook 2a in theslider 3 using twoblades 4. -
Fig. 5(c) shows the cross sectional structure seen from a cutting surface line C-C inFig. 5(b) . Since the twoblades 4 are laid on each other, the curving portion 4e is opened to both sides of a center line 1a. The notch 2e and the fork portion 2f are provided on two side walls of the slider groove 2c provided on the needle shank 2b to press the curving portion 4e downward. - [Patent Literature 1] Japanese Patent No.
3577038 - As shown in
Fig. 5(c) , in the needle shank 2b of theneedle body 2, the slider groove 2c is formed at a middle part in the widthwise direction to guide the curving portion 4e of theblade 4 to the notch 2e provided on the side wall, and the tongue 4a is sunk in the slider groove 2c at a clearing time. Since the slider groove 2c is formed by processing a groove from the top surface side of theneedle body 2, the fork portion 2f is processed at the same time to be the wall in a thin plate. Theblade 4 is also in a thin plate, and the underside of the fork portion 2f engages with the curving portion 4e with the thin plates. - In the flatbed knitting machine, it is called a fine gauge when the arrangement density of the knitting needles is increased and the arrangement pitch is reduced. In the fine gauge, the width of the needle groove is also reduced, and the width of the
needle body 2 that can be put in the needle groove is also reduced. In the structure of using the curving portion 4e for pressing at a clearing time as shown inFigs. 5 , the thickness of the side wall of the needle shank 2b and the plate thickness of theblade 4 become thin, so that it becomes difficult to contact the underside of the fork portion 2f with the top end of the curving portion 4e. - It is an object of the present invention to provide a compound needle for a flatbed knitting machine that can reliably guide tongues to be sunk in a slider groove at a clearing time, in which a slider having tongues formed with two blades is moved back with respect to a needle body.
- The present invention is a compound needle for a flatbed knitting machine, comprising:
- a needle body having a hook at a front end and a slider groove formed on a needle shank extending rearward from the hook; and
- a slider having two blades, each blade being provided with a tongue formed at a front portion, the blades being capable of hanging a stitch and at least a portion of the blades being put in the slider groove of the needle body to be guided in a front-rear direction, and the tongues opening and closing the hook by relative movement to the needle body,
- characterized in that
- the needle body provided with:
- a closing portion, neighboring on a rear side of the hook and having a bottom surface in a section of the slider groove to put in the tongues in a state where the front portion of the tongues closes the hook;
- a clearing portion, formed so as to have a bottom surface in a portion of the slider groove to put in head end portions of the tongues, and so as not to have bottom surface in a portion of the slider groove to put in rear side portions of the tongues backward of the head end portions of the tongues in a clearing state where the tongues move back with respect to the needle body on a rear side of the closing portion to open the hook and receive a stitch retreating from the hook; and
- an overhanging portion, formed over the clearing portion so as to extend from rearward to frontward at a width covering at least the slider groove, and provided with a pressing portion on an under surface thereof; and
- each of the two blades having:
- an arm, extended on the rearward beyond the tongue so as to allow vertical movement of the tongue by elastic bending; and
- a sloping portion, provided near a front end portion of the arm so as to project upward from the slider groove within a width thereof, to contact with the pressing portion on the under surface of the overhanging portion of the needle body, and to reduce a height from the frontward to the rearward.
- Moreover, in the present invention, said blade has a curving portion at said front portion, neighboring to a rearward of said tongue and opening an upper end of the blade to an outward of the slider groove,
- said arm is extended over the rearward beyond said overhanging portion of said needle body, and
- said sloping portion is formed on a down side to rearward beyond a front end of the arm.
- Furthermore, in the present invention, a front portion of said blade is formed so that said tongue and a portion neighboring to the rearward of the tongue fall within the width of said slider groove,
- on said needle body, the slider groove is formed with no bottom surface to the rearward beyond said overhanging portion, and
- said sloping portion is formed on an up side to front ward beyond the front end of said arm.
- According to the present invention, the tongue is put in the clearing portion of the slider groove, in the clearing state in which the slider moves back with respect to the needle body to open the hook and the tongue receives a stitch retreating from the hook. Since the overhanging portion is formed above the clearing portion in such a way that the overhanging portion is extended from the rear side of the needle body to the front side at the width covering at least the slider groove, the sloping portion of the blade is contacted with the pressing portion provided on the under surface of the overhanging portion, and the tongue is sunk in the slider groove with a pressing force. The tongue is pressed within the width of the slider groove, so that it is possible to reliably guide the tongue to be sunk in the slider groove even though the plate thickness of the needle body becomes thin.
- The sloping portion is pressed by the pressing portion on the under surface of the overhanging portion, so that it is possible to eliminate the influence of processing on the under surface of the overhanging portion if the slider groove is processed from below the needle shank. The slider groove is bottomless in the clearing portion, so that it is possible that dust tends to be removed out of the inside of the slider groove and the possibility of malfunction caused by the clogging of dust is reduced.
- Moreover, according to the present invention, the arm is extended on the rearward beyond the overhanging portion, so that it is possible to form the compound needle by readily combining the needle body with the slider from above, even though the curving portion is provided subsequent to the tongue. It is possible that the tongue is pressed and sunk in the slider groove at a clearing time with the sloping portion provided on the back side near the front end of the arm and the tongue is reliably pressed within the width of the slider groove.
- Furthermore, according to the present invention, the blade is not provided with the curving portion to swell outward beyond the width of the slider groove, so that it is possible to readily assemble the compound needle in which the blade is inserted forward as passing below the overhanging portion, even though the slider groove is formed on the rearward beyond the overhanging portion.
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- [
Fig. 1] Figs. 1 are side views and a front cross sectional view showing a schematic structure of acompound needle 11 according to an example of the present invention. - [
Fig. 2] Figs. 2 are side views showing main components structuring thecompound needle 11 shown inFig. 1 and a combination thereof. - [
Fig. 3] Figs. 3 are partial side views showing a schematic structure of acompound needle 21 according to another example of the present invention. - [
Fig. 4] Figs. 4 are side views showing main components structuring thecompound needle 21 shown inFigs. 3 and a combination thereof. - [
Fig. 5] Figs. 5 are partial side views and a front cross sectional view showing a schematic structure of aconventional compound needle 1. - In the following,
Figs. 1 andFigs. 2 show a schematic structure of acompound needle 11 of a flatbed knitting machine according to an example of the present invention.Figs. 3 andFigs. 4 show a schematic structure of acompound needle 21 of a flatbed knitting machine according to another example of the present invention. Although matters common to thecompound needle 11 and thecompound needle 21 are collectively explained with reference numerals and signs marked on the components of thecompound needle 11 and thecompound needle 21, portions for use in the respective examples are not always be allowed to use in combination. - In the drawings, in some cases, portions corresponding to the portions previously explained are designated the same reference numerals and signs, and the overlapping explanations are omitted. In addition, in some cases, mention is made of reference numerals and signs that are not marked in the drawings for explanation but marked in the drawings previously explained.
-
Figs. 1 andFigs. 3 show the schematic structures of the compound needles 11, 21 according to the examples of the present invention. Thecompound needle 11 includesneedle body 12 andslider 13, theslider 13 includingblade 14 andbase body 15. Thecompound needle 21 includesneedle body 22 andslider 23, theslider 23 includingblade 24 andbase body 25. Thecompound needle 11 also includes aneedle jack 6. Although thecompound needle 21 also includes aneedle jack 6 as similar to thecompound needle 11, theneedle jack 6 is omitted in the drawings. In theneedle bodies slider grooves 12c, 22c are respectively provided onneedle shanks 12b, 22b subsequent to hooks 12a, 22a of the front ends. Although theslider grooves 12c, 22c have bottom surfaces 12d, 22d near the front ends respectively, the bottom surfaces 12d, 22d are not provided on the rearward, and overhanging portions 12e, 22e are formed above theslider grooves 12c, 22c so as to be overhung from the rearward. The overhanging portions 12e, 22e are separated downside by spaces to the top surfaces of theneedle shanks 12b, 22b, on which theslider grooves 12c, 22c are formed, and pressing portions 12f, 22f are provided on the underside of the overhanging portions 12e, 22e. Joiningportions 12g, 22g are respectively provided on the rear portions of theneedle bodies needle jack 6. - At least the lower portions of the
blades slider grooves 12c, 22c with two blades laid on each other, in which tongues 14a, 24a are provided on the front end and arms 14b, 24b are provided behind the rearward of the tongues 14a, 24a, respectively. Joining portions 14c, 24c are provided near the rear end of the arm 14b, 24b and joined to joining portion 15c, 25c provided near the front ends of the arms 15b, 25b of thebase body compound needle 11, a curving portion 14e is provided subsequent to the tongue 14a. Sloping portions 14f, 24f are respectively provided subsequent to the tongues 14a, 24a, in which the height of the sloping portions 14f, 24f are reduced from the frontward to the rearward. These portions are provided at the top ends of the arms 14b, 24b as head portions14g, 24f of theblades slider grooves 12c, 22c by the bending of the arms 14b, 24b, respectively. -
Fig. 1(a) andFig. 3(a) show a state in which the hook opening of the hooks 12a, 22a are closed with the tongues 14a, 24a. The head portions14g, 24g of theblades portions slider grooves 12c, 22c in which the head portions 14g, 24g are floating in theslider grooves 12c, 22c by upward force from the bottom surfaces12d, 22d and the head ends of the tongues 14a, 24a contact with the tip ends of the hooks 12a, 22a to close the hook openings. The upper portion of the arm 14b of thecompound needle 11 is inserted into an arm groove 15d provided on thebase body 15, and a swing of theslider groove 12c in the widthwise direction is suppressed in this state. A swing stopping protrusion 24d at the front end of the arm 24b of thecompound needle 21 is put in a protrusion putting in portion 25a provided at the front end of thebase body 25, and a swing of the slider groove 22c in the widthwise direction is suppressed in this state. It is also possible to move the tongues 14a, 24a forward beyond the hooks12a, 22a. -
Figs. 1(b) and3(b) show a state at a clearing time. The head portions 14g, 24g of theblades slider grooves 12c, 22c, and the sloping portions 14f, 24f are pressed with the pressing portions 12f, 22f on the under surfaces of the overhanging portions 12e, 22e. The tongues 14a, 24a are sunk in theslider grooves 12c, 22c, so that stitches can smoothly move back along theneedle shanks 12b, 22b, respectively. Since the arm 14b of thecompound needle 11 is extended on the rearward beyond the overhanging portion 12e, it is possible to form thecompound needle 11 by combining theneedle body 12 with theslider 13 from above even though the curving portion 14e is provided subsequent to the tongue 14a. Since the sloping portion 14f is formed on the down side, which is the rearward beyond the front end of the arm 14b, it is possible to reliably press the sloping portion 14f with the pressing portion 12f on the under surface of the overhanging portion 12e even though the arm 14b passes over the overhanging portion 12e. Thecompound needle 21 is not provided with a portion corresponding to the curving portion 14e that swells outward beyond the width of the slider groove 22c. Consequently, in thecompound needle 21, it is possible to readily assemble theblades 24 in case theblade 24 is inserted forward as passing below the overhanging portion 22e, even though the slider groove 22c is formed to the rearward beyond the overhanging portion 22e. -
Fig. 1(c) shows a cross sectional structure seen on a cutting surface line C-C inFig. 1(b) . Since the overhanging portion 12e is formed along the entire width of theneedle shank 12b, it is possible that the upper ends of the sloping portions 14f of theblades 14 in two layers are readily contacted with the overhanging portion 12e to reliably press the sloping portion 14f with the pressing portion 12f on the under surface of the overhanging portion 12e from above. Theslider groove 12c is processed from above theneedle shank 12b in theclosing portion 12h, whereas theslider groove 12c is processed from below theneedle shank 12b in the clearing portion 12i. Since the clearing portion 12i is opened downward, it is also possible to remove dust out of the inside of theslider groove 12c in operation as a knitting needle. Also for thecompound needle 21, in a cross sectional structure of the clearing portion 22i, the overhanging portion 22e is similarly formed along the entire width of the needle shank 22b, and it is possible to readily press the sloping portions 24f of theblades 24 in two layers with the pressing portions 22f. Since the slider groove 22c formed similarly to theslider groove 12c of thecompound needle 11 is also opened downward in the clearing portion 22i, it is possible to readily perform processing and removal of dust. -
Figs. 2 andFigs. 4 respectively show structures of main components of the compound needles 11, 21 shown inFigs. 1 andFigs. 3 .Fig. 2(a) shows a structure of theblade 14 and thebase body 15. On the rearward of thebase body 15, the arm 15b is extended, and a butt 15e is erected to receive the drive for theslider 13.Fig. 2(b) shows theblade 14 and thebase body 15 for theslider 13 in combination by joining the joining portions 14c, 15c to each other.Fig. 2(c) shows a state in which theneedle body 12 and theneedle jack 6 are combined. Theneedle body 12 performs main operations for the knitting needle with the drive to the butt 6b provided on theneedle jack 6.Fig. 4(a) shows structures of theblade 24 and thebase body 25. On the rearward of thebase body 25 ofFigs. 3 , the arm 25b is extended, and the butt is provided to receive the drive for theslider 23, however, they are omitted in the drawing.Fig. 4(b) shows theblade 24 and thebase body 25 for theslider 23 in combination by joining the joining portions 24c, 25c to each other.Fig. 4(c) shows theneedle body 22. -
- 11, 21
- Composite needle
- 12, 22
- Needle body
- 12a, 22a
- Hook
- 12b, 22b
- Needle shank
- 12c, 22c
- Slider groove
- 12e, 22e
- Overhanging portion
- 12f, 22f
- Pressing portion
- 12h, 22h
- Closing portion
- 12i, 22i
- Clearing portion
- 13, 23
- Slider
- 14, 24
- Blade
- 14a,24a
- Tongue
- 14e
- Curving portion
- 14f, 24f
- Sloping portion
- 15, 25
- Base body
Claims (3)
- A compound needle (11, 21) for a flatbed knitting machine, comprising:a needle body (12, 22) having a hook (12a, 22a) at a front end and a slider groove (12c, 22c) formed on a needle shank (12b, 22b) extending rearward from the hook (12a, 22a); anda slider (13, 23) having two blades (14, 24), each blade (14, 24) being provided with a tongue (14a, 24a) formed at a front portion, the blades (14, 24) being capable of hanging a stitch and at least a portion of the blades (14, 24) being put in the slider groove (12c, 22c) of the needle body (12, 22) to be guided in a front-rear direction, and the tongues (14, 24) opening and closing the hook (12a, 22a) by relative movement to the needle body (12, 22),characterized in thatthe needle body (12, 22) provided with:a closing portion (12h, 22h), neighboring on a rear side of the hook (12a, 22a) and having a bottom surface (12d, 22d) in a section of the slider groove (12c, 22c) to put in the tongues (14a, 24a) in a state where the front portion of the tongues (14a, 24a) closes the hook (12a, 22a);a clearing portion (12i, 22i), formed so as to have a bottom surface (12d, 22d) in a portion of the slider groove (12c, 22c) to put in head end portions of the tongues (14a, 24a), and so as not to have bottom surface (12d, 25d) in a portion of the slider groove (12c, 22c) to put in rear side portions of the tongues (14a, 24a) backward of the head end portions of the tongues (14a, 24a) in a clearing state where the tongues (14a, 24a) move back with respect to the needle body (12, 22) on a rear side of the closing portion (12h, 22h) to open the hook (12a, 22a) and receive a stitch retreating from the hook (12a, 22a); andan overhanging portion (12e, 22e), formed over the clearing portion (12i, 22i) so as to extend from rearward to frontward at a width covering at least the slider groove (12c, 22c), and provided with a pressing portion (12f, 22f) on an under surface thereof; andeach of the two blades (14, 24) having:an arm (14b, 24b), extended on the rearward beyond the tongue (14a, 24a) so as to allow vertical movement of the tongue (14a, 24a) by elastic bending; anda sloping portion (14f, 24f), provided near a front end portion of the arm (14b, 24b) so as to project upward from the slider groove (12c, 22c) within a width thereof, to contact with the pressing portion (12f, 22f) on the under surface of the overhanging portion (12e, 22e) of the needle body (12, 22), and to reduce a height from the frontward to the rearward.
- The compound needle (11) for a flatbed knitting machine according to claim 1, characterized in that
said blade (14) has a curving portion (14e) at said front portion, neighboring to a rearward of said tongue (14a) and opening an upper end of the blade (14) to an outward of the slider groove (12c),
said arm (14b) is extended over the rearward beyond said overhanging portion (12e) of said needle body (12), and
said sloping portion (14f) is formed on a down side to rearward beyond a front end of the arm (14b). - The compound needle (21) of a flatbed knitting machine according to claim 1, characterized in that
a front portion of said blade (24) is formed so that said tongue (24a) and a portion neighboring to the rearward of the tongue (24a) fall within the width of said slider groove (22c),
on said needle body (22), the slider groove (22c) is formed with no bottom surface (22d) to the rearward beyond said overhanging portion (22e),
and
said sloping portion (24f) is formed on an up side to front ward beyond the front end of said arm (24b).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010260511A JP5618778B2 (en) | 2010-11-22 | 2010-11-22 | Compound needle of flat knitting machine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2458052A2 true EP2458052A2 (en) | 2012-05-30 |
EP2458052A3 EP2458052A3 (en) | 2012-09-05 |
EP2458052B1 EP2458052B1 (en) | 2015-06-17 |
Family
ID=45093272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11009237.6A Active EP2458052B1 (en) | 2010-11-22 | 2011-11-22 | Compound needle for flatbed knitting machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2458052B1 (en) |
JP (1) | JP5618778B2 (en) |
CN (1) | CN102535001B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2581480A1 (en) * | 2011-10-12 | 2013-04-17 | Groz-Beckert KG | Slider needle with improved slider |
EP3425097A3 (en) * | 2017-07-07 | 2019-02-13 | Shima Seiki Mfg., Ltd. | Compound needle |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6249660B2 (en) * | 2013-07-29 | 2017-12-20 | 株式会社島精機製作所 | Compound needle of flat knitting machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3577038B2 (en) | 1999-10-27 | 2004-10-13 | 株式会社島精機製作所 | Guide mechanism for knitting member and composite needle incorporating the same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03119160A (en) * | 1989-10-03 | 1991-05-21 | Shima Seiki Seisakusho:Kk | Compound needle |
JP3554094B2 (en) * | 1995-12-12 | 2004-08-11 | 株式会社島精機製作所 | Composite needle with transfer function |
JP3158109B2 (en) * | 1999-02-12 | 2001-04-23 | 株式会社島精機製作所 | Stitch locking method by flat knitting machine |
JP2001032155A (en) * | 1999-07-15 | 2001-02-06 | Shima Seiki Mfg Ltd | Compound needle for knitting machine |
FR2821093B1 (en) * | 2001-02-20 | 2003-05-09 | Steiger S A C Atel Const | SLIDING NEEDLE FOR KNITTING MACHINE |
DE50308273D1 (en) * | 2002-10-31 | 2007-11-08 | Groz Beckert Kg | Meshing elements for knitting and warp knitting machines |
CN100436688C (en) * | 2002-12-20 | 2008-11-26 | 株式会社岛精机制作所 | Compound needle |
JP3983720B2 (en) * | 2003-06-25 | 2007-09-26 | 株式会社島精機製作所 | Compound needle |
-
2010
- 2010-11-22 JP JP2010260511A patent/JP5618778B2/en active Active
-
2011
- 2011-11-15 CN CN201110361239.8A patent/CN102535001B/en active Active
- 2011-11-22 EP EP11009237.6A patent/EP2458052B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3577038B2 (en) | 1999-10-27 | 2004-10-13 | 株式会社島精機製作所 | Guide mechanism for knitting member and composite needle incorporating the same |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2581480A1 (en) * | 2011-10-12 | 2013-04-17 | Groz-Beckert KG | Slider needle with improved slider |
US8578740B2 (en) | 2011-10-12 | 2013-11-12 | Groz-Beckert Kg | Slider needle with improved slider |
EP3425097A3 (en) * | 2017-07-07 | 2019-02-13 | Shima Seiki Mfg., Ltd. | Compound needle |
Also Published As
Publication number | Publication date |
---|---|
EP2458052B1 (en) | 2015-06-17 |
EP2458052A3 (en) | 2012-09-05 |
CN102535001A (en) | 2012-07-04 |
CN102535001B (en) | 2015-03-04 |
JP5618778B2 (en) | 2014-11-05 |
JP2012112059A (en) | 2012-06-14 |
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