CN210314701U

CN210314701U - Knitting yarn holding and cutting device of flat knitting machine

Info

Publication number: CN210314701U
Application number: CN201920411125.1U
Authority: CN
Inventors: 鸟居慎平; 宫井卓哉
Original assignee: Shima Seiki Mfg Ltd
Current assignee: Shima Seiki Mfg Ltd
Priority date: 2018-03-29
Filing date: 2019-03-28
Publication date: 2020-04-14
Anticipated expiration: 2029-03-28
Also published as: JP2019173248A; KR20190002530U; KR200492820Y1

Abstract

The utility model provides a flat knitting machine's braided yarn keeps cutting device, it can be with a drive shaft drive looper and shearing part, can simplify the mechanism. As shown in fig. 3(a), in a state where the arcuate portion (27b) of the rod (27) abuts against the pin (21b) of the looper (21), a stay section is formed in which the looper is in a state of continuing to descend. When the drive shaft (12) continues to rotate counterclockwise, the pin engages with the engaging portion (27a), and when the drive shaft further continues to rotate counterclockwise, the engaging portion pushes up the looper via the engaged pin as shown in fig. 3 (b). In the stay section, the thickness change section (28a) and the diameter change section (28b) of the triangle (28) open and close the rotary blade (22b) with respect to the fixed blade (22a) of the cutter (22) via an arm member (24) attached to the lower end of the rotary shaft (23).

Description

Knitting yarn holding and cutting device of flat knitting machine

Technical Field

The utility model relates to a knitting yarn of flatbed knitting machine keeps cutting device, it can move in the length direction of needle bed, catches and cuts the knitting yarn that supplies with to the knitting needle to keep the end yarn after cutting off.

Background

Conventionally, in a flat knitting machine for knitting gloves, a knitting yarn holding and cutting device is used when a finger pocket for receiving one finger is knitted from a fingertip to a portion connected to a body and is shifted to knitting of the next adjacent finger pocket (for example, see patent document 1). In the knitting yarn holding and cutting device, a moving means movable in the longitudinal direction of a needle bed includes a looper (lift lever) and a cutter (cutting device), and the looper (japanese patent: ルーパー) is caused to act on a knitting yarn extending from the last stitch of a knitted pocket to a yarn feeder from one side of the knitting width. The looper can move up and down and has a pull-in hook at the upper part. The function of the looper is to cause the draw-in hook to catch the knitting yarn. The cutter (Japanese: ハサミ) comprises a fixed blade, a rotary blade, and a holding piece. The grip pieces are capable of holding the knitting yarns before the cutter cuts. The rotary blade rotates around a vertical rotary shaft to cut the knitting yarn between the rotary blade and the fixed blade.

The movement of the moving means is performed along two guide rails that are erected in the longitudinal direction of the needle bed. The two guide rails are circular rods, and are not described in patent document 1, but are drive shafts that rotate to drive the looper and the cutter, respectively. A mechanism such as a tractor is also provided to move the moving means.

In knitting a finger pocket of a glove, a stitch composite bar for performing crotch overlapping (japanese: strand weight ね) is also used. The loop composite rod acts from one side of the knitting width (see, for example, patent document 2 describing a knitting-port presser). The loop composite rod is to knit the next finger pocket continuous with the knitted finger pocket on one side of the knitting width so as to have a step overlap. The moving means cuts the knitting yarn extending from the last stitch of the knitted pocket to the yarn feeder, holds the end yarn on the side of the yarn feeder as an end excess yarn, releases the holding in the knitting of the next pocket, and performs a process of knitting the end excess yarn into the knitted fabric.

Documents of the prior art

Patent document

Patent document 1: japanese examined patent publication No. 48-24421

Patent document 2: japanese patent No. 3053376

Patent document 1 presupposes that a plurality of devices required for knitting gloves with a flat knitting machine are driven by a single driving source in mechanical linkage. The device to be driven includes a knitting yarn holding and cutting device, a stitch composite bar, a carriage, a needle selection roller, and the like. Since the respective devices are driven in close relation, it is difficult to change the specification.

When the respective devices are driven separately, it is possible to improve efficiency by making it possible to change specifications, adjust operation timing, and the like in the respective controls. However, in the moving unit, two driving sources are required in order to drive the looper and the cutter via the driving shafts, respectively.

When the moving means of the knitting yarn holding and cutting device is used together with the stitch composite bar, a glove of four-finger body size can be knitted by knitting four finger pockets including little fingers in order on one side of the knitting width and then knitting the main body portion. In order to knit a glove of three-finger size in which a toe pocket of a little finger is knitted from the rear, it is necessary to provide a moving means and a stitch composite bar on the other side of the knitting width. In the case of using two moving means as described above, four driving sources are required, and four driving shafts for transmitting driving force to the moving means are also required, which complicates the mechanism and occupies a large space.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a braided yarn of flatbed knitting machine keeps cutting device, its looper and the shearing member that can drive a mobile unit with a drive shaft to can simplify the mechanism.

The utility model relates to a flat knitting machine's knitting yarn keeps cutting device, the mobile unit can utilize drive mechanism to remove in the length direction of needle bed, the mobile unit possesses:

a looper which is vertically movable and has a draw-in hook at an upper portion thereof, guides a knitting yarn supplied to a knitting needle from above a needle bed gap to the draw-in hook rising from below the needle bed gap, and can catch the knitting yarn when the draw-in hook is lowered;

a cutter having a fixed blade and a rotary blade, the rotary blade rotating about a vertical rotation axis and cutting and holding the knitting yarn caught by the draw-in hook; and

a movable support body supporting the curved needle and the shearing member,

the knitting yarn holding and cutting device of a flatbed knitting machine is characterized by comprising:

a drive shaft that is provided so as to extend in the longitudinal direction of the needle bed, guides the movement of the movement support body, and drives the looper and the cutter by rotating in the longitudinal direction;

a drive source that drives the drive shaft to rotate;

a rotation stop guide unit that guides movement of the movable support body and stops rotation of the movable support body with respect to driving by the drive shaft;

a lever swinging with rotation of the driving shaft to move the looper up and down; and

a cam which converts rotation of the drive shaft into rotation about a vertical rotation axis and rotates a rotary blade of the cutter,

the rod has a stay section where the looper stays even if it swings,

the triangle has a stay section staying in a state where the rotary blade of the cutter is opened with respect to the fixed blade,

the opening action of the rotating blade of the shearing part relative to the fixed blade and the closing action of the rotating blade relative to the fixed blade are carried out in the staying interval of the curved needle,

the curved needle moves up and down in the staying zone of the shearing part.

Further, in the present invention, the lever has:

the clamping part is clamped with the lower part of the curved needle and enables the curved needle to move up and down; and

and an arc-shaped portion formed to be continuous in an arc shape from the engagement portion in a swing direction in which the looper is raised, and corresponding to a staying section of the looper.

In addition, in the utility model, the rotating blade is arranged at the upper end of the rotating shaft,

the cam has a thickness changing portion where the thickness of the needle bed in the longitudinal direction changes and a diameter changing portion where the diameter from the center of the drive shaft changes,

an arm member having two abutting portions is provided at a lower end of the rotating shaft,

the two contact portions of the arm member are respectively in contact with the surfaces of the thickness changing portion and the diameter changing portion of the triangle, and are driven so that the rotary blade is opened with respect to the fixed blade by one of the increase in thickness and the increase in diameter and the rotary blade is closed with respect to the fixed blade by the other of the increase in thickness and the increase in diameter.

In addition, in the present invention, the moving means is provided on one side of the knitting width and the other side of the knitting width,

the drive shaft and the rotation stop guide means of one of the moving means of the knitting width are respectively the rotation stop guide means and the drive shaft of the other of the moving means of the knitting width.

According to the present invention, the drive shaft which is provided so as to extend in the longitudinal direction of the needle bed and guides the movement of the movable support body drives the looper and the cutter by rotating around the longitudinal direction. The looper is moved up and down by a lever that swings with a drive shaft. The cutter converts the rotation of the drive shaft into rotation about a vertical rotation axis by a triangle to rotate the rotary blade. A dwell section is provided in the looper so as to be held near the lower limit, and the opening and closing of the cutter and the holding operation of the knitting yarn are performed in the dwell section. The cutter is provided with a stay section which stays in an open state, and the curved needle is moved up and down in the stay section. The looper and the shearing member can be driven by one drive shaft, thereby simplifying the mechanism.

In addition, according to the present invention, the arc-shaped portion provided on the rod is made to correspond to the stay section of the looper, and the operation of the looper is not affected even if the shearing member is operated.

In addition, according to the present invention, the following operations can be performed: the rotating blade of the cutter is closed with respect to the fixed blade by either one of an increase in the thickness or an increase in the diameter of the triangle, and the rotating blade is opened with respect to the fixed blade by either the other. The rotating blade of the cutter is closed with respect to the fixed blade, so that the knitting yarn can be held and cut, and the rotating blade of the cutter is opened with respect to the fixed blade, so that the held knitting yarn can be released, and the knitting yarn can be newly caught and held and cut.

In addition, according to the present invention, the two drive shafts respectively driven by the two drive sources can be used as the drive shaft in one of the two sets of moving units and as the rotation stop guide unit in the other moving unit, and can also be used as each other. Since the two sets of moving means are arranged on one side and the other side of the knitting width of the knitted fabric to be knitted, the holding and cutting of the knitting yarn can be independently performed on both sides of the knitting width.

Drawings

Fig. 1 is a left side view of a flat knitting machine 1 showing a configuration related to a knitting yarn holding and cutting device 10 of the flat knitting machine 1 in a simplified manner as an embodiment of the present invention.

Fig. 2(a) to (c) are a plan view, a front view, and a right side view of the knitting yarn holding and cutting device 10 showing the configuration of the main part of the moving means 11 in fig. 1.

Fig. 3(a) to (b) are partial front views showing a descending time and an ascending time, respectively, of the looper 21 in the moving unit 11 of fig. 2.

Fig. 4(a) to (B) are a front view showing the shape of the driving member 26 and a cross-sectional view taken along a cutting line B-B.

Fig. 5 is a front view showing a structure related to the knitting yarn holding and cutting device 10 in the flat knitting machine 1 of fig. 1 in a simplified manner with the

needle beds

2 and 3 removed.

Fig. 6 is a simplified top view corresponding to fig. 5.

Fig. 7 is a simplified left side view of fig. 5 with the outer frame 35 omitted.

Fig. 8(a) to (e) are simplified plan and front views showing the operation of the looper 21 and the cutter 22 in the moving unit 11.

Description of the reference numerals

1 Flat knitting machine

2 front needle bed

3 Back needle bed

4 tooth mouth

10 braided yarn holding and cutting device

11 moving unit

12 drive shaft

13 guide shaft

14 rack for moving

15 moving motor

16 pinion

20 moving support

21 curved needle

21a draw-in hook

21b pin

22 shear member

22a fixed edge

22b rotary blade

23 rotating shaft

24 arm member

26 drive member

27 bar

27a engaging part

27b arc part

28 triangle

28a thickness change part

28b diameter change part

30 knitting yarn holding spring

36 driving motor

Detailed Description

Hereinafter, a schematic configuration and operation of the knitting yarn holding and cutting device 10 of the flatbed knitting machine 1 according to the embodiment of the present invention will be described with reference to fig. 1 to 8. For convenience of explanation, parts not shown in the drawings to be explained may be referred to by reference numerals shown in other drawings. In addition, only a part of the drawings related to each other such as a plan view, a front view, and a side view may be partially illustrated, and the other parts are not illustrated.

Examples

Fig. 1 shows a configuration of a knitting yarn holding and cutting device 10 of a flatbed knitting machine 1 in a state where the flatbed knitting machine 1 is viewed from the left as an embodiment of the present invention. The flat knitting machine 1 includes a front needle bed 2 and a rear needle bed 3. The front needle bed 2 and the back needle bed 3 have a shape extending in the longitudinal direction which is a direction perpendicular to the drawing sheet, and a plurality of knitting needles are arranged along the longitudinal direction. The front needle bed 2 and the rear needle bed 3 are inclined so as to face each other with a gap to be the needle bed gap 4 and descend in a direction away from the needle bed gap 4. The front needle bed 2 and the back needle bed 3 are supported on both sides in the longitudinal direction by the inner frame 5. Hereinafter, the front needle bed 2 and the back needle bed 3 may be collectively referred to as "needle beds". In the longitudinal direction, the range in which the knitting needles are provided on the needle bed is a knitting width with which the knitted fabric can be knitted. Although not shown, a yarn feeder or the like for supplying a knitting yarn is disposed above the needle bed gap 4. Knitting of a knitted fabric is performed by feeding a knitting yarn from a needle bed to a hook of a knitting needle entering a needle bed gap 4 and withdrawing the knitting needle from the needle bed gap 4 to the needle bed side.

A knitting yarn holding and cutting device 10 is provided below the needle bed. The knitting yarn holding and cutting device 10 includes a moving unit 11 movable in the longitudinal direction of the needle bed. The movement of the moving unit 11 is guided by the drive shaft 12 and the guide shaft 13 and driven by the moving rack 14. The drive shaft 12 and the guide shaft 13 are disposed at positions symmetrical with respect to the center 4a of the needle bed gap 4, and the interval therebetween is also obtained largely within a range allowed by the space below the needle bed. The moving unit 11 can be stably guided by the drive shaft 12 and the guide shaft 13. The moving rack 14 is driven by a pinion 16, and the pinion 16 is attached to an output shaft of a moving motor 15 provided on the outer portion of the longitudinal inner frame 5. The moving rack 14, the moving motor 15, and the pinion 16 form a moving mechanism with respect to the moving unit 11. The moving mechanism is not limited to this combination, and the moving unit 11 may be pulled by a belt, a wire, or the like.

Fig. 2 shows the structure of a moving unit 11 as a main part of the knitting yarn holding and cutting device 10. (a) The top view, the front view, and the right side view of the moving unit 11 are shown in (a), (b), and (c). Referring also to fig. 1, the moving unit 11 includes a moving support 20, a looper 21, a cutter 22, a rotating shaft 23, an arm member 24, a pressing spring 25, and a driving member 26. The movable support 20 is guided by the movement of the drive shaft 12 and the guide shaft 13 in the vicinity of the distal ends of the drive arm 20a and the support arm 20b, respectively. A vertical guide 20c for guiding the vertical movement of the looper 21 is provided between the driving arm 20a and the support arm 20 b. A cutter support portion 20d for supporting the cutter 22 is provided above the movable support body 20.

The looper 21 is vertically movable, and includes a pull-in hook 21a at an upper portion and a pin 21b at a lower portion that receives driving of the vertical movement. When the looper 21 is raised with respect to the knitting yarn extending from the knitting needle holding the last stitch to be knitted to the yarn feeder above the needle bed gap 4, the knitting yarn can be guided to the draw-in hook 21 a. When the looper 21 is lowered, the knitting yarn is caught by the draw-in hook 21 a. The cutter 22 includes a fixed blade 22a and a rotating blade 22 b. The rotating blade 22b is mounted on the upper end of the rotating shaft 23. When the rotary blade 22b rotates around the vertical rotary shaft 23 and the rotary blade 22b closes with respect to the fixed blade 22a, the knitting yarn caught by the draw-in hook 21a is cut. The fixed blade 22a is fixed to the distal end side of the shear support portion 20d by a screw 20 e. The upper portion of the rotating shaft 23 passes through an insertion hole provided in the cutter support portion 20d, and the upper end thereof protrudes from the upper end of the cutter support portion 20d, and the rotating blade 22b is attached to the upper end thereof. An arm member 24 is attached near the lower end of the rotating shaft 23. A pressing spring 25 is inserted between the lower end of the cutter support portion 20d and the upper end of the arm member 24 at the lower portion of the pivot shaft 23. The pressing spring 25 presses the rotating shaft 23 downward via the arm member 24 with respect to the cutter support portion 20d, and presses the rotating blade 22b attached to the upper end of the rotating shaft 23 toward the fixed blade 22 a.

The driving means 26 is integrally formed with a lever 27 and a cam 28 for driving the looper 21 and the cutter 22. The rod 27 swings with the rotation of the drive shaft 12, and moves the looper 21 up and down. The guide shaft 13 guides the movement of the moving means 11 and also stops the rotation of the moving means 11 with respect to the rotation of the drive shaft 12, and thus functions as a rotation stop guide means. The cam 28 converts the rotation of the drive shaft 12 into rotation about the vertical rotation shaft 23 and rotates the rotary blade 22b of the cutter 22. Therefore, the drive shaft 12 not only guides the movement of the movement support body 20, but also has a function of driving the looper 21 and the cutter 22 by rotating in the longitudinal direction. Therefore, the key groove is formed in the drive shaft 12, and the key 29 is provided between the drive shaft 12 and the driving member 26, so that the rotation of the drive shaft 12 is reliably transmitted to the driving member 26. The lever 27 and the cam 28 may be formed as separate members and combined for use. The rotary blade 22b and the arm member 24 may be integrated with the rotary shaft 23.

The knitting yarn holding spring 30 is provided above the cutter 22, as shown in (b) and (c), which are not shown in fig. 2 (a). The knitting yarn holding spring 30 has an upper plate 30a, an intermediate plate 30b, and a lower plate 30 c. The upper plate 30a and the lower plate 30c are fixed to the fixing blade 22a with screws 20 e. The intermediate plate 30b is fixed to the upper end of the rotary shaft 23 and rotates together with the rotary blade 22 b. The middle plate 30b presses and holds the knitting yarn between the upper plate 30a and the lower plate 30 c. The holding of the knitting yarn by the knitting yarn holding spring 30 is performed before the rotary blade 22b is closed with respect to the fixed blade 22a to cut the knitting yarn caught by the draw-in hook 21a of the looper 21. Therefore, when the knitting yarn is cut, the front end of the portion of the knitting yarn continuous with the yarn feeder above the needle bed gap 4 is held by the knitting yarn holding spring 30.

As in patent document 1, when knitting the finger bags of gloves in order, after knitting one finger bag, the next finger bag is knitted while cutting the knitting yarn with the cutter 22 and holding the excess end yarn with the knitting yarn holding spring 30. Although not shown, the movable support body 20 is further provided with a flow path for receiving supply of compressed air from the outside of the inner frame 5 of the flatbed knitting machine 1 or the like and blowing out the compressed air to the vicinity of the portion of the cutter 22 where the fixed blade 22a and the rotary blade 22b are opened. The excess end yarn held by the knitting yarn holding spring 30 is released and held during knitting of the next finger bag, and is knitted into the knitted fabric by guiding by air blowing.

In fig. 3, the main components of the moving unit 11 of fig. 2 are shown (a) when the looper 21 is lowered and (b) when it is raised. Illustration of the movable support body 20 and the pressing spring 25 is omitted. The rod 27 of the driving member 26 has an engaging portion 27a and an arc portion 27 b. The engaging portion 27a engages with a pin 21b provided at a lower portion of the looper 21 to move the looper 21 up and down. The arcuate portion 27b is continued from the engaging portion 27a in an arcuate shape in the swing direction of the lever 27 which raises the looper 21 when engaging with the pin 21 b. The pin 21b may be a projection provided integrally with the roller or the looper 21, and may be engaged with the engaging portion 27 a.

Assume a case where the drive shaft 12 rotates counterclockwise in the drawing from the state shown in fig. 3 (a). In a state where the arcuate portion 27b of the rod 27 abuts on the pin 21b of the looper 21 as shown in (a), the looper 21 continues to be lowered. When the drive shaft 12 continues to rotate counterclockwise, the pin 21b engages with the engaging portion 27a, and when the drive shaft 12 further continues to rotate counterclockwise, the engaging portion 27a pushes up the looper 21 via the engaged pin 21 b. Fig. 3(b) shows a state in which the rod 27 pushes up the looper 21 to the upper limit. In this state, as shown by a one-dot chain line in fig. 1, the pull-in hook 21a of the looper 21 protrudes upward from the needle bed gap 4. By raising the draw-in hook 21a to a position higher than the knitting yarn supplied from the yarn feeder and extending to the hook of the knitting needle, the knitting yarn can be guided to the lower side of the draw-in hook 21 a.

In fig. 4, (a) shows the shape of the driving member 26 as a front view, and (B) shows the shape of the driving member 26 as a cross-sectional view viewed from a cutting line B-B of (a). In the arcuate portion 27b of the rod 27, the diameter 27r from the center 26c of the insertion hole through which the drive shaft 12 is inserted is constant, and the looper 21 is held at the lowered position, so the arcuate portion 27b corresponds to the staying section of the looper 21. The cam 28 has a thickness changing portion 28a in which a thickness 28t in the longitudinal direction of the needle bed changes, and a diameter changing portion 28b in which a diameter 28r from the center 26c changes. On the side of the thickness change portion 28a where the thickness 28t becomes thinner, a thin flat section 28c is provided in which the thinnest thickness is constant. The thin flat section 28c is continued by an inclined section 28d in which the thickness 28t increases, and further continued by a thick flat section 28e in which the thickest thickness is constant. On the side of the diameter-varied portion 28b where the diameter 28r is increased, a large-diameter section 28f is provided in which the maximum diameter 28r is constant. The large diameter section 28f is continuously provided with an inclined section 28g in which the diameter 28r is reduced, and a small diameter section 28h in which the diameter 28r is reduced.

As shown in fig. 2(a), the arm member 24 has an arm divided into two abutting portions, an abutting portion 24a and an abutting portion 24 b. When the thickness 28t of the thickness varying portion 28a increases due to the rotation of the triangle 28, the arm member 24 drives the rotating shaft 23 in the direction in which the rotating blade 22b closes with respect to the fixed blade 22 a. When the contact portion 24b contacts the inclined section 28g in which the diameter 28r of the diameter changing portion 28b increases due to the rotation of the cam 28, the arm member 24 drives the rotating shaft 23 in the direction in which the rotating blade 22b opens with respect to the fixed blade 22 a. The opening and closing of the cutter 22 by the rotation of the rotary blade 22b with respect to the fixed blade 22a is performed by a combination of the shapes of the arm member 24 and the triangle 28, and if the combination is changed, the cutter 22 can be closed by the increase of the diameter 28r and the cutter 22 can be opened by the increase of the thickness 28 t. The triangular portion 28 may be configured to drive the cutter 22 such that the rotary blade 22b is opened with respect to the fixed blade 22a by one of an increase in the thickness 28t and an increase in the diameter 28r and the rotary blade 22b is closed with respect to the fixed blade 22a by the other.

Fig. 5, 6, and 7 show the structure of the knitting yarn holding and cutting device 10 in front view, plan view, and left side view of the flat knitting machine 1 with the front needle bed 2 and the rear needle bed 3 omitted. In fig. 7, the outer frame 35 is also omitted. The drive shaft 12 and the guide shaft 13 are supported between the inner frames 5 in the longitudinal direction of the needle bed, and the drive motor 36 is attached to the inner frame 5 on one side. An outer frame 35 is provided outside the inner frame 5 with a space therebetween, and the moving motor 15 is attached to the other outer frame 35. The moving unit 11 of the knitting yarn holding and cutting device 10 is movable between the inner frames 5.

As shown in fig. 7, the drive motor 36 is installed in a region that is divided into two at the center 4a with respect to the inner frame 5 and becomes the drive shaft 12 side. A gear 37 is attached to an output shaft of the drive motor 36, and a sector-shaped drive gear 40 attached to the drive shaft 12 is driven to rotate via

intermediate gears

38 and 39. As will be described later in fig. 8, since the drive shaft 12 rotates within an angular range of about 90 °, the drive gear 40 is formed in a fan shape, and space consumption is reduced.

The moving means 11 may be additionally provided in the longitudinal direction of the needle bed, and the two moving means 11 may be operated independently. In fig. 7, the region on the guide shaft 13 side is empty, but the same configuration as the drive motor 36 and the like can be provided in this region. Even if the guide shaft 13 is rotated by providing a key groove, the guide of the moving unit 11 driven by the drive shaft 12 is not affected. That is, the guide shaft 13 provided with the key groove can function as a drive shaft with respect to the additional moving unit 11. The drive shaft 12 functions as a rotation stop guide unit for the moving unit 11. By adding a moving mechanism corresponding to the moving motor 15 or the like to the additional moving unit 11, the two moving units 11 can be used equally.

By using two moving units 11 together with the two-directional stitch composite rods, gloves of three-finger size can be knitted. Further, by using two moving means 11, it is possible to use the case where pattern knitting is performed by separately using knitting yarns of two colors, for example. Two moving units 11 are made to stand by on both sides of the knitting width in advance. While knitting with the knitting yarn of the first color, the first moving means 11 is prepared in advance for cutting and holding, and the end yarn of the second color is held by the knitting yarn holding spring 30 of the second moving means 11. When the use of the knitting yarn of the second color is switched, after the knitting yarn of the second color holding the end yarn by the second moving means 11 is cut by the first moving means 11, the knitting using the knitting yarn of the second color holding the end yarn by the second moving means 11 is started, and the holding of the end yarn of the second color is released after the knitting is performed.

Further, the rotation stop guide means may be used as a guide shaft 13 or may be used as another structure such as a moving rack 14. Further, a pipe for supplying compressed air to the moving means 11 may be reinforced and used as the rotation stop guide means.

Fig. 8 shows the operation of the bending needle 21 and the shearing part 22 in the moving unit 11 in a simplified manner. (a) The state is shown in which the looper 21 is at the lowered position and the rotary blade 22b of the cutter 22 is closed. The pin 21b of the looper 21 is pressed by the arcuate portion 27b of the lever 27. The contact portion 24a of the arm member 24 contacts the thick flat section 28e of the cam 28, and maintains the closed state of the cutter 22. The abutment portion 24b faces the small diameter section 28 h. When the drive shaft 12 is rotated counterclockwise as shown by the arrow, the lever 27 continues to be in a state where the arcuate portion 27b presses the pin 21b, and becomes a stay section in which the rising of the looper 21 is restricted and the position of the lowering is maintained. The contact portion 24b of the arm member 24 contacts the inclined section 28g of the diameter changing portion 28b of the cam 28, and the rotating shaft 23 is rotated so that the rotating blade 22b opens with respect to the fixed blade 22a as the diameter 28r increases. The contact portion 24a is shifted from a state of contacting the thick flat section 28e to a state of facing the inclined section 28 d.

(b) The curved needle 21 continues to stay at the lowered position where the rising is restricted, and the rotary blade 22b of the cutter 22 is opened with respect to the fixed blade 22 a. The abutting portion 24a of the arm member 24 faces the inclined section 28 d. When the drive shaft 12 is rotated in the arrow direction from (b), the pin 21b engages with the engagement portion 27a of the lever 27, and the lever 27 pushes up the looper 21 via the pin 21 b. By pushing up the looper 21, the pull-in hook 21a at the upper end projects above the mouth 4 until (c) is reached, the arm member 24 is in a state where the contact portion 24b is in contact with the large diameter section 28f, and the contact portion 24a faces the thin flat section 28 c. If there is a knitting yarn extending from the hook of the knitting needle to the yarn feeder, the knitting yarn is guided to the lower side of the draw-in hook 21a while the looper 21 is being raised. The cutter 22 stays in the open state, and becomes a stay section.

(c) The looper 21 is shown in a raised position with the cutter 22 open. The drive of the drive shaft 12 in the counterclockwise direction is stopped, and the drive shaft 12 is driven in the clockwise direction as shown in (c) to (d). Since the pin 21b is engaged with the engagement portion 27a of the lever 27, the looper 21 descends together with the clockwise swing of the lever 27. The shear member 22 remains open during the dwell interval. The knitting yarn guided under the draw-in hook 21a when the looper 21 ascends is caught by the descending draw-in hook 21 a. (d) The state shown is the same as the state shown in (b). However, the drawing hook 21a is different in that the knitting yarn is caught.

(d) The pin 21b is shown in a state where it is transferred from the engagement portion 27a of the rod 27 to the arcuate portion 27b and no longer engaged, and the looper 21 is in the stop zone at the lowered position. When the drive shaft 12 rotates in the clockwise direction, the abutment portion 24a of the arm member 24 shifts from a state of abutting against the thin flat section 28c of the thickness varying portion 28a to a state of abutting against the inclined section 28 d. Since the stay section of the cutter 22 is completed and the thickness is increased by the inclined section 28d with which the abutment portion 24a abuts, the rotating blade 22b is closed with respect to the fixed blade 22a until (e) is reached, and the knitting yarn caught by the draw-in hook 21a is cut. (e) In the state shown, the looper 21 is in the stop zone at the lowering position, and the cutter 22 is in the closed state, as in the state shown in (a). The rising of the looper 21 is restricted in the staying section from (d) to (e) in the same manner as in the staying section from (a) to (b).

As shown in fig. 2(b) and (c), a knitting yarn holding spring 30 is provided at an upper portion of the cutter 22, and in fig. 8(d) to (e), the knitting yarn extending toward the yarn feeder is held by the knitting yarn holding spring 30 before the cutter 22 is closed to cut the knitting yarn. After the cutting by the cutter 22, the state of the end yarn of the knitting yarn extending from the yarn feeder is continuously held by the knitting yarn holding spring 30. The end yarn held by the knitting yarn holding spring 30 is released from the knitting yarn holding spring 30 when the cutter 22 is opened in fig. 8(a) to (b).

As described above, the lever 27 of the driving member 26 has a stay section in which the looper 21 stays downward even if it swings. The cam 28 has a stay section for staying in a state where the rotary blade 22b of the cutter 22 is opened with respect to the fixed blade 22 a. In the stay section of the looper 21, an opening operation of opening the rotary blade 22b of the cutter 22 with respect to the fixed blade and a closing operation of closing the rotary blade 22b with respect to the fixed blade 22a are performed, and the looper 21 is moved up and down in the stay section of the cutter 22.

Claims

1. A knitting yarn holding and cutting device of a flatbed knitting machine, wherein a moving means is movable in a longitudinal direction of a needle bed by a pulling mechanism, the moving means comprising:

a cutter having a fixed blade and a rotary blade, the rotary blade rotating around a vertical rotation axis to cut the knitting yarn caught by the draw-in hook; and

a movable support body supporting the curved needle and the shearing member,

a drive source that drives the drive shaft to rotate;

the rod has a stay section where the looper stays even if it swings,

the curved needle moves up and down in the staying zone of the shearing part.

2. The knitting yarn holding and cutting device of a flatbed knitting machine according to claim 1,

the rod has: the clamping part is clamped with the lower part of the curved needle and enables the curved needle to move up and down; and an arc-shaped portion formed to be continuous in an arc shape from the engagement portion in a swing direction in which the looper is raised, and corresponding to the stay section.

3. The knitting yarn holding and cutting device of a flatbed knitting machine according to claim 1 or 2,

the rotating blade is arranged at the upper end of the rotating shaft,

4. The knitting yarn holding and cutting device of a flatbed knitting machine according to claim 1 or 2,

the moving unit is arranged on one side of the knitting width and the other side of the knitting width,

5. The knitting yarn holding and cutting device of a flatbed knitting machine according to claim 3,