CN111188120A

CN111188120A - Fixed sinker and flat knitting machine

Info

Publication number: CN111188120A
Application number: CN201911109544.0A
Authority: CN
Inventors: 山野浩稔
Original assignee: Shima Seiki Mfg Ltd
Current assignee: Shima Seiki Mfg Ltd
Priority date: 2018-11-14
Filing date: 2019-11-14
Publication date: 2020-05-22
Also published as: JP2020079466A; JP7256632B2; EP3656905B1; EP3656905A1; KR102291245B1; KR20200056325A

Abstract

A fixed sinker and a flat knitting machine, the fixed sinker and a knitting member are hard to collide with each other. The fixed sinker (1) includes a plate-shaped sinker main body (2) having a function of forming a sinker loop. At least one side surface (2a) of the sinker body (2) is provided with an inclination with respect to the thickness, which increases in the direction of movement from an upper starting end (2f) to a lower ending end (2 g). The other side surface (2b) of the sinker main body (2) is also provided with the same inclination. The two side surfaces (2a, 2b) are provided with an inclination of increasing thickness, and the sinker main body (2) is tapered in a front view shown in (a). When a knitting member such as a stitch presser enters from above the opposing needle bed, the starting end (2f) of the plate thickness above the sinker main body (2) becomes thinner, so that the collision can be made difficult.

Description

Fixed sinker and flat knitting machine

Technical Field

The present invention relates to a fixed sinker provided at a tip end on a needle bed side of a flat knitting machine and a flat knitting machine including the fixed sinker.

Background

Conventionally, a flat knitting machine has knitting needles arranged in parallel at a constant pitch in the longitudinal direction of a needle bed. At least two needle beds are disposed so as to face each other in the front and rear direction of the needle bed gap. Each knitting needle is accommodated in a needle groove provided in the needle bed, and is driven so that a hook provided at a tip advances and retreats with respect to a needle bed gap. Plate-like sinkers are arranged as separate members between knitting needles on the front end side of the needle bed facing the needle bed gap. The knitting needle is driven so that the hook at the tip enters the needle bed gap and the knitting yarn is supplied to the hook from above the needle bed gap, and then the hook is pulled into the needle bed. The sinker is used to form a sinker loop together with a needle loop formed by a hook when a knitting needle is pulled into a needle bed, and to determine a stitch density of a stitch size. The fixed sinker attached to the needle bed so as to be immovable on the needle bed gap side has a basic function of determining the stitch density, and if a protrusion is provided on a side surface of the fixed sinker, a function of supporting a side load of the knitting needle can be added (for example, see patent document 1).

As the sinker having the function of routing the stitch density, a movable sinker that swings at the tip end portion on the side of the notch may be used. The swinging tip portion of the movable sinker has a function of pushing the formed coil downward of the tooth mouth. The movable sinker and the fixed sinker may be used in combination, and the fixed sinker may be used to perform the stitch density (see, for example, patent document 2). The sinker may be fixed so that the wire material to be the top tooth is supported by a hole provided near the front end on the tooth edge side, and the knocking of the old coil is stabilized when a new coil is formed.

The flatbed knitting machine of patent document 2 also includes a stitch presser that advances and retracts from an auxiliary bed disposed above the rear needle bed to between the fixed sinker and the knitting needle of the front and rear needle beds. The stitch presser has a function of guiding a knitting yarn to a hook of a knitting needle or pressing a knitted stitch (for example, refer to patent document 3).

Prior art documents

Patent document

Patent document 1: japanese patent laid-open No. 2006-161230

Patent document 2: japanese laid-open patent publication No. 2015-132026

Patent document 3: international publication No. 03/018892 pamphlet

Disclosure of Invention

Problems to be solved by the invention

As disclosed in patent document 3, a stitch presser provided above a needle bed, for example, the rear needle bed, for use in combination with knitting needles and fixed sinkers provided on both the front and rear needle beds, can be considered as one of knitting members capable of forming a satisfactory stitch. The function of the knitting member is considered to be various, but the following function is required: the needle bed enters the needle bed gap from above the needle bed facing each other across the needle bed gap, and reaches the side surface of the fixed sinker while descending through the needle bed gap. Since a plurality of knitting needles are arranged in each knitting machine with a narrow gap, the knitting member needs to enter the narrow gap between the knitting needles and the fixed sinker that is the center between the knitting needles. When the knitting member enters the gap between the fixed sinker and the knitting needle from above the opposing needle bed, the influence of the offset between the front and rear needle beds is also added, and there is a possibility that the knitting member collides with the fixed sinker. If the braided member and the fixed sinker collide with each other due to the advance and retreat of such a braided member, there is a risk that the fixed sinker and the braided member are deformed or damaged.

In a flat knitting machine, in order to knit a fine knitted fabric using a fine knitting yarn, it is desirable to make the pitch of knitting needles arranged in parallel fine. If the pitch is made smaller, the clearance between the fixed sinker and the knitting needle into which the knitting member enters is also narrowed, the allowable range of the displacement between the front and rear needle beds is also narrowed, and it becomes difficult to adjust the front and rear facing positions. In order to avoid collision between the knitted member and the fixed sinker, it is also conceivable to make the thicknesses of the knitted member and the fixed sinker thin. However, if the plate thickness is reduced, the knitting member and the fixed sinker are easily bent, and the thinned knitting yarn is easily caught.

The invention aims to provide a fixed sinker and a flat knitting machine, wherein the fixed sinker and a knitting member are difficult to collide.

Means for solving the problems

The present invention is a fixed sinker for a flatbed knitting machine, the fixed sinker being a fixed sinker for a flatbed knitting machine having at least a pair of needle beds opposed to each other with a needle bed interposed therebetween, the fixed sinker being disposed at a tip end on a needle bed side between knitting needles arranged in parallel on the needle beds, the fixed sinker including a plate-like sinker body having a function of forming sinker loops, the fixed sinker being characterized in that an inclination with respect to a thickness such that the inclination increases in a predetermined changing direction from an upper starting end toward a lower ending end in a state of being disposed on the needle beds is provided on at least one side surface of the sinker body.

In the fixed sinker according to the present invention, the inclined sinker main body is provided with a stitch density portion for hooking a knitting yarn in the function of forming a sinker loop below the starting end in the changing direction, at a front edge on the tip side facing the notch.

In the sinker body according to the present invention, the other side surface that is the back surface side of the one side surface is provided with an inclination with respect to the thickness.

In the present invention, the sinker body is provided with support projections projecting toward the side faces of the knitting needles entering the needle bed gap on both the side faces of the one side face and the other side face, and the inclination with respect to the thickness is provided on both the side faces of the portion other than the support projections.

Further, the present invention is a flatbed knitting machine including the fixed sinker described in any one of the above; at least a pair of needle beds facing each other with a needle bed gap therebetween; and a knitting member that advances and retreats to and from the needle bed gap and moves up and down in the needle bed gap, wherein a plate-like sinker body that fixes the sinker is disposed at the needle bed gap side tip of at least one of the needle beds, and the knitting member is disposed above at least the other needle bed.

[ Effect of the invention ]

According to the invention, the fixed sinker comprises a plate-shaped sinker body. The sinker body is disposed at the tip end on the needle bed gap side of the flat knitting machine, and the thickness of the sinker body increases in the direction of change from the upper starting end to the lower ending end on at least one side. The knitting member entering the needle bed gap from the opposite needle bed side is in a state of descending in the direction of change in thickness of one side surface in the gap between the one side surface of the sinker main body and the hook of the adjacent knitting needle. Since the thickness of the upper sinker main body is thinner at the upper starting end of the knitted member starting to descend into the gap than at the lower ending end, it can be made difficult to collide. Since the thickness of the sinker main body increases toward the final end with an inclination in the direction of change, the sinker main body can be made less likely to bend as compared with the case where the entire sinker main body is made thinner at the starting end.

Further, according to the present invention, even if the front edge of the sinker main body is thinned at the upper starting end, the thickness of the portion where the knitting yarn is caught can be prevented from being thinned because the stitch density portion where the sinker loop is caught is located below the starting end at the time of stitch formation.

Further, according to the present invention, since the other side surface of the plate-like sinker main body is also thinned at the upper starting end and thickened at the lower ending end in the changing direction, the inclination of the thickness can be effectively utilized when the plate-like sinker main body is disposed in common as a component on both needle beds facing each other in the front and rear direction. In the needle bed side where the knitting member is provided above, the starting end of the other side surface through which the knitting member that has entered the needle bed gap and has descended passes is made thin, so that the knitting member and the sinker main body can be made difficult to collide. In the case where the movable sinker is used in combination with both needle beds, the side surface on which the movable sinker swings can be the back surface side of the side surface through which the knitting member passes, and the gap between the side surface and the thinning start end is increased to make interference difficult.

Further, according to the present invention, in the case where the sinker body to which the sinker is fixed is arranged on the needle bed on which the knitting member advances and retreats from the needle bed side facing each other across the needle bed gap, the knitting member can be made to enter the side along the inclination of the side surface side on which the thickness is increased until the tip of the knitting member reaches the support projection. The supporting projection can support the side so that the knitting needle advancing and retreating on the side of the side face does not come too close to the entering knitting member.

Further, according to the present invention, a flatbed knitting machine can be obtained in which the sinker body for fixing the sinker is disposed at the tip end on the needle bed gap side of at least one needle bed, the knitting member provided above the other needle bed facing each other is advanced and retreated relative to the needle bed gap, and the knitting member and the sinker body are less likely to collide when the knitting member is moved up and down in the needle bed gap.

Drawings

Fig. 1 is a partial front view and a right side view illustrating a structure of a fixed sinker 1 according to an embodiment of the present invention.

Fig. 2 is a partial right side sectional view of the flatbed knitting machine 10 of fig. 1 to which the fixed sinker 1 is attached.

Fig. 3 is a partial right side sectional view showing the operation of the stitch presser 20 in the flatbed knitting machine 10 of fig. 2.

Fig. 4 is a plan view showing a pattern of arrangement of the fixed sinker 1 and the stitch presser 20 in the flatbed knitting machine 10 of fig. 2.

Detailed Description

In order to implement the mode of the invention

Next, a schematic structure of the fixed sinker 1 according to an embodiment of the present invention will be described with reference to fig. 1 to 4. For the sake of convenience of explanation, in some drawings to be described, reference characters described in other drawings may be given to parts not described.

[ examples ]

Fig. 1 shows a structure of a fixed sinker 1 according to an embodiment of the present invention. (a) Is a front view of the sinker main body 2 that realizes functions such as formation of sinker loops in the fixed sinker 1, and (b) is a right side view of the entire fixed sinker 1 shown in a posture of being attached to the needle bed. The sinker body 2 is plate-shaped, is disposed at the tip end on the needle bed gap side of the flat knitting machine, and has a function of forming sinker loops. On one side surface 2a of the sinker body 2, in a state of being arranged on the needle bed, an inclination with respect to the thickness which increases in a predetermined changing direction D is provided from an upper starting end 2f toward a lower final end 2 g. In the sinker main body 2, the other side surface 2b on the back side, which is one side surface 2a, is also provided with the same inclination. In the present embodiment, the inclination of the sinker main body 2 with increased thickness is provided symmetrically on both side surfaces 2a, 2b, and the sinker main body 2 is tapered in a front view shown in (a).

In the fixed sinker 1, the portions other than the sinker main body 2 have a larger thickness than the sinker main body 2, and serve as the support projections 3 and the attachment arms 4. The supporting projection 3 is supported so as to be in contact with the side surface of the knitting needle and prevent lateral deflection when the knitting needle entering the needle bed gap is bent by receiving a lateral load when the knitting needle is attached to the needle bed as the fixed sinker 1. In this embodiment, a flatbed knitting machine having upper and lower needle beds is used, and the support projection 3 includes an upper layer part 3a and a lower layer part 3 b. The support projection 3 is provided on the side of the sinker body 2 away from the needle bed when the fixed sinker 1 is attached to the needle bed. The mouthpiece side of the sinker body 2 is a front edge 2c, and a recess near the upper and lower middle portions of the front edge 2c is a lap density portion 2 d. Through holes 2e are provided in the vicinity of the middle between the winding density portion 2d and the terminal end 2 g. The through-hole 2e can support a wire serving as a top tooth. The sinker body 2 and the lower portion of the support projection 3 are continuous with the mounting arm 4. The mounting arm 4 has a hooking recess 4a on the upper end side and a through hole 4b on the lower end side.

As shown in (a), the plate thickness of the sinker body 2 is T1 at the upper starting end 2f and T2 at the lower terminating end 2g separated from the starting end 2f by a height H. The direction from the start end 2f to the end 2g is the direction along the changing direction D in (b). The changing direction D is related to the entering direction of the knitting member, which is described later with reference to fig. 3.

When manufacturing the fixed sinker 1, a metal plate having a plate thickness required for the attachment arm 4 is used as a raw material, and the support projection 3 is processed so as to leave the plate thickness without reducing the plate thickness, thereby reducing the plate thickness of the portion of the sinker main body 2. This machining may be performed by mechanical cutting or grinding. The inclination of the increased thickness may be asymmetrical such that the angles are different between the one side surface 2a and the other side surface 2b, or the angle may change in the middle, or the inclination may be curved, or may be provided only on the one side surface 2 a.

The thickness of the sinker body 2 is about 4 to 1 times the thickness of the metal plate before machining. As the metal plate, for example, a steel plate having a thickness of about 1mm can be used. The thickness taper is formed, for example, with a thickness T1 at the starting end 2f being 0.26mm and a thickness T2 at the ending end 2g being about 0.30 mm. The height H is, for example, about 8 mm. In this case, since the thickness is increased by 0.04mm while the movement is advanced by 8mm, the inclination of 0.5% can be obtained. If the thickness T1 of the start end 2f is made smaller, the knitting member entering from the opposing needle bed is less likely to collide. Even if the thickness T1 is thin, the thickness of the constant coil density portion 2d provided midway from the start end 2f to the end 2g is lower than the start end 2f, and therefore, it becomes thicker than T1. If the thickness T2 of the terminal end 2g is not made too thin, the thickness of the loop determining density portion 2d on which the knitting yarn is hooked can be made not thin. However, if the thickness T1 becomes thin and sharp at the upper starting end 2f, the knitting yarn may be damaged by contact at the needle bed gap. The thicknesses T1 and T2 may be determined appropriately according to the thickness of the metal plate as the material, the degree of overlap of the knitted member, and the like.

Fig. 2 is a simplified view showing a part of the structure of the flatbed knitting machine 10 of fig. 1 to which the fixed sinker 1 is attached. The fixed sinker 1 is attached such that the sinker body 2 is attached to the tip sides of the substrates 11a and 12a facing each other on the front needle bed 11 and the rear needle bed 12. The

needle beds

11 and 12 are provided in two upper and lower beds, respectively, but the needle bed on the upper side is not shown. The fixed sinker 1 is attached by inserting the attachment arm 4 into a groove formed on the tip side of the base plates 11a and 12 a. A hooking wire 13 is inserted between the hooking recess 4a of the mounting arm 4 and the substrates 11a and 12a, and a wire passing through a groove provided in the substrates 11a and 12a is passed through a lower through hole 4b not shown. The fixed sinkers 1 attached to the front needle bed 11 and the rear needle bed 12 face each other with the needle bed gap 14 formed by the gap between the front needle bed 11 and the rear needle bed 12 interposed therebetween.

The front needle bed 11 and the back needle bed 12 include an upper layer not shown in the drawings, have basically the same configuration, and include knitting needles 15 in upper and lower layers. The knitting needle 15 uses a compound needle in which a hook 15a at the tip advances and retreats with respect to the needle bed gap 14 and the opening and closing of the hook 15a is performed by a slider 15 b. As the sinker, a movable sinker 16 is used in addition to the fixed sinker 1. In forming the coil, the knock-off is stabilized by the steel wire 17 for the top teeth supported by the through-hole 2e provided in the sinker body 2 of the fixed sinker 1.

In each of the

needle beds

11 and 12, needle plates are provided in parallel on a side away from the needle bed gap 14 with respect to the sinker body 2 for fixing the sinker 1 arranged in parallel on the needle bed gap 14 side, and a needle groove for accommodating the knitting needle 15 is formed between the needle plates. The needle plate may be extended toward the tooth gap 14 side to form the sinker main body 2 at the tip. When the

needle beds

11 and 12 are arranged in two upper and lower layers, the needle bed on the upper layer side is placed on an extension line of the needle bed on the lower layer side to the upper side of the needle plate. The needle plate on the upper side of the back needle bed 12 extends upward and supports the auxiliary bed accommodating the stitch presser 20. The front end portion 21 of the stitch presser 20 can enter the fixed sinker 1 attached to the front needle bed 11 so as to overlap one another on the side of the one-side surface 2a of the sinker body 2 from above the rear needle bed 12. The stitch presser 20 shown by a solid line shows a state of waiting above the rear needle bed 12. The stitch presser 20 is driven by a cam mechanism mounted on a carriage, not shown, as disclosed in patent document 3, for example, and approaches the sinker body 2 that fixes the sinker 1 in the vicinity of the center of the needle bed gap 14 from the back needle bed 12 side upward as indicated by a two-dot chain line.

Fig. 3 shows the operation of the stitch presser 20 in the change direction D of fig. 1(b) in the flatbed knitting machine 10 of fig. 2. The tip end portion 21 shown by the two-dot chain line in fig. 2 further enters, and at a position where it is caught on the sinker body 2 of the fixed sinker 1 of the front needle bed 11, the tip end portion 21 descends in the gap between the one side surface 2a side of the sinker body 2 and the hook 15a of the knitting needle 15 as shown by the solid line. Therefore, the entering direction of the sinker main body 2 and the front end portion 21 of the coil presser 20 at the overlapping portion corresponds to the vertical changing direction D shown in fig. 1 (b). Since the thickness of the sinker main body 2 is thinner at the upper starting end 2f where the coil presser 20 starts to enter the overlap range than at the lower ending end 2f, the risk of mechanical interference can be reduced and collision is made difficult. In the sinker main body 2, the other side surface 2b on the back side which becomes the one side surface 2a is also provided with an inclination with respect to the thickness, and when the movable sinker 16 is provided in the gap between the other side surface 2b and the hook 15a of the knitting needle 15, the gap can be increased and interference is difficult. In addition, even when the fixed sinker 1 is attached to the rear needle bed 12, a gap can be secured by the inclination with respect to the thickness on the other side surface 2b through which the coil presser plate 20 passes.

Fig. 4 schematically shows the arrangement of the fixed sinkers 1 and the stitch presser 20 in the flatbed knitting machine 10 of fig. 2. Fig. 2 and 3 correspond to cross sections seen from positions where the knitting needles 15 are on the near side and the sinker 1 is fixed to the far side. The movable sinker 16 is disposed between the fixed sinker 1 and the knitting needle 15 so that the tip end portion 21 of the stitch presser 20 advances and retreats. The front end 21 of the stitch presser 20 enters the gap S between the one side surface 2a of the sinker body 2 and the hook 15a of the knitting needle 15 in the front needle bed 11, and enters the gap between the other side surface 2b and the hook 15a in the rear needle bed 12. Further, the movable sinker 16 is disposed on the other side face 2b side of the sinker body 2 in the front needle bed 11 and on the one side face 2a side of the sinker body 2 in the rear needle bed 12, respectively, and the tip portion swings in the needle bed gap 14. Since the plate thicknesses of the side surfaces 2a and 2b of the sinker main body 2 are reduced at the sides of the tip end portion of the swing motion, a gap can be secured and interference during the swing motion can be reduced.

On both side surfaces 2a, 2b of the sinker body 2, support projections 3 are provided which project toward the side surfaces of the knitting needles 15 entering the needle bed gap 14. The coil holding plate 20 can incline the distal end portion 21 along the side of the one-side surface 2a having an increased thickness to the side until reaching the supporting projection 3. The supporting projection 3 can support the side so that the knitting needle 15 advancing and retreating on the side of the one side surface 2a does not come close to the distal end 21 of the entering stitch presser 20. The inclination of the thickness is provided on both side surfaces 2a and 2b of the sinker main body 2 excluding the support projections 3, and therefore, the inclination can be effectively provided in a range where the tip end portion 21 can enter.

In the present embodiment, the front needle bed 11 and the back needle bed 12 are formed in two upper and lower layers, but both may be one layer or one layer may be used. In order to make it difficult for the stitch presser 20 entering from above the opposing needle bed to collide with the leading end 2f of the sinker main body 2, an inclination to increase the plate thickness may be provided only on the side of the entering one side face 2 a. Since the increase in the plate thickness is continuously performed by the inclination, the discontinuous step portion which is performed stepwise is not generated, and the plate can be guided to smoothly enter even when the coil presser plate 20 is in contact with the coil presser plate.

The effect of the inclination of the plate thickness described above can be effectively obtained not only when the stitch presser 20 is inserted from the auxiliary bed provided only above one of the front and rear needle beds sandwiching the needle bed gap 14, but also when the stitch presser 20 is inserted from above both the needle beds. The knitting member can be obtained even when a knitting member other than the stitch presser 20 is inserted to contribute to knitting of the knitted fabric. For example, in the present embodiment, the action of pushing the stitches downward by the movable sinker 16 may be performed by such a knitting member. In addition, a knitting member having a new function can be added.

Description of the symbols

1: fixed sinker

2: sinker body

2 a: one side surface

2 b: the other side surface

2 c: leading edge

2 d: loop-defining density portion

3: supporting protrusion

10: flat knitting machine

11: front needle bed

12: back needle bed

14: tooth mouth

15: knitting needle

15 a: needle hook

16: movable sinker

20: coil pressing plate

21: a front end portion.

Claims

1. A fixed sinker for a flatbed knitting machine having at least one pair of needle beds opposed to each other with a needle bed gap therebetween, which is disposed at a tip end on the needle bed gap side between knitting needles arranged in parallel on the needle beds, includes a plate-like sinker body having a function of forming a sinker loop,

the fixed sinker is characterized in that at least one side surface of the sinker main body is provided with an inclination with respect to the thickness, which increases in a predetermined direction of change from an upper starting end to a lower ending end in a state of being arranged on a needle bed.

2. The fixed sinker according to claim 1, wherein the inclined sinker main body has a stitch density portion for hooking a knitting yarn in the function of forming a sinker loop below the starting end of the changing direction at a front edge on a front end side facing the notch.

3. The fixed sinker according to claim 1 or 2, wherein the sinker main body is provided with an inclination with respect to the thickness on the other side surface which is a back surface side of the one side surface.

4. The fixed sinker of claim 3,

a support protrusion protruding toward a side surface of the knitting needle entering the needle bed gap is provided on both side surfaces of the one side surface and the other side surface of the sinker main body,

the inclination with respect to the thickness is provided on both side surfaces of the portion other than the support protrusion.

5. A flat knitting machine is characterized in that,

the flat knitting machine comprises the fixed sinker described in any one of claims 1 to 4; at least a pair of needle beds facing each other with a needle bed gap therebetween; and a knitting member which advances and retreats to and moves up and down in the tooth mouth,

a plate-like sinker body for fixing the sinker is arranged at the tip end of at least one needle bed on the needle bed gap side,

the knitting member is provided above at least the other needle bed.