JPWO2008018185A1 - Movable sinker and flat knitting machine - Google Patents

Abstract

Provided are a movable sinker and a flat knitting machine that can be manufactured at a low cost even if a torque spring portion is integrated with the sinker portion, eliminate individual variations, and shorten the manufacturing work time. From an intermediate portion between the support portion 12a and the arm portion 12b of the sinker portion 12 of the movable sinker 11, the torque spring portion 13 extends in the opposite direction of the arm portion 12b. Subsequent to the extending portion 13a, a bypass portion 13b that bypasses the virtual circle center 4c is formed on the inner peripheral side of the support portion 12a. Following the detour portion 13b, a free end portion 13c parallel to the extending portion 13a is formed. A protruding portion 13d protruding outward in the radial direction is provided between the detour portion 13b and the free end portion 13c to add a line length. By adding the wire length, a sufficient relationship between the amount of displacement and the load can be obtained even in stamping of the press.

Description

  The present invention relates to a movable sinker and a flat knitting machine that press a knitted fabric with a spring bias.

  2. Description of the Related Art Conventionally, a sinker having a function of assisting formation of a sinker loop in tentacle knitting, clearing of a needle loop, and knockover is provided at a tip of a needle bed of a flat knitting machine. By making the sinker movable, knitting such as multi-tuck, pin tack, turnback knitting and the like, which is difficult to knitting with a fixed sinker, becomes easy. By spring-biasing the movable sinker, an appropriate tension is always applied to the stitch loop, and a knitted fabric with high quality and good texture can be knitted.

  FIG. 5A shows a configuration of the movable sinker device 1 that presses the knitted fabric with a spring-biased movable sinker (see, for example, Patent Document 1). The movable sinker device 1 is a combination of a sinker member 2 and a wire spring 3 and is arranged near the tip of the needle plate 4 on the side of the tooth opening 5. The needle plates 4 are arranged at regular intervals in a direction perpendicular to the drawing sheet. A needle groove for accommodating the knitting needle is formed between the needle plates 4. The sinker member 2 has a plate shape and is molded so as to have the shape shown in the drawing. The needle plate 4 has a notch 4a in which the thickness of one side surface of the upper portion is reduced near the tip. In the cutout portion 4a, the sinker member 2 is accommodated with a substantially inverted Ω-shaped portion including the support portion 2a. The needle plate 4 is formed with a sinker support recess 4b at the bottom of the notch 4a. The sinker support recess 4b supports the support portion 2a of the sinker member 2 with an arcuate surface. The outer periphery of the support portion 2a is fitted into the sinker support recess 4b. The sinker member 2 is capable of oscillating displacement about the virtual circular center 4c of the arc on the inner peripheral side of the supporting recess 4b, and the arm portion 2b extending from the support portion 2a is toothed in accordance with the oscillating displacement. Move forward and backward to mouth 5. A knitting yarn receiving portion 2c that presses the knitting yarn of the knitted fabric that hangs down from the knitting needle to the mouth 5 is formed near the tip of the arm portion 2b. In the middle of the arm portion 2b, a front edge portion 2d that forms a sinker loop when the knitting yarn is drawn into the knitting needle by means of the tentacle knitting is provided at a portion where the diameter from the circle center 4c is maximum. . The arm 2b has a reduced thickness on the side not contacting the notch 4a of the needle plate 4 so that the front edge 2d is at the center between adjacent knitting needles.

  In the wire spring 3, the base end portion 3 a is elastically locked to a spring locking portion 2 e provided at a portion where the arm portion 2 b extends from the inverted Ω-shaped portion of the sinker member 2. The wire spring 3 is generally U-shaped except for the base end portion 3a. The U-shaped portion bends along the inner periphery of the support portion 2a of the sinker member 2 and bypasses the detour portion 3b that bypasses the circular center 4c, and the free end portion 3c that extends in parallel with the base end portion 3a from the detour portion 3b. And have. The vicinity of the tip of the free end portion 3 c comes into contact with the pressing portion 4 d on the upper side of the notch portion 4 a of the needle plate 4. In the state shown in the figure, the wire spring 3 is pressed so that the free end portion 3c is closer to the base end portion 3a side than in the free state, and the sinker member 2 is rotated clockwise around the center 4c. Directional torque is applied. When the reverse torque based on the tension of the knitting yarn applied to the stitch receiving portion 2c increases, the sinker member 2 swings and displaces counterclockwise, and the tension of the knitting yarn is relaxed.

  In the movable sinker device 1 shown in FIG. 5A, the sinker member 2 and the wire spring 3 are separate bodies. The sinker member 2 is manufactured by punching a metal plate with a press. The wire spring 3 is manufactured by bending a metal wire having a square cross section. On the other hand, a sinker integrated with a spring has also been proposed (see, for example, Patent Document 2). The sinker disclosed in FIG. 4 of Patent Document 2 is used in a circular knitting machine, is generally linear, and a spring element is formed on the opposite side of the head that performs the knitting action. Also in Patent Document 1, it is described in the vicinity of the end of the column of “Example” that “the sinker plate may be formed of a spring rope and the urging means may be formed by its elasticity”. .

  FIG.5 (b) shows the structure assumed when the sinker member 2 and the wire spring 3 are integrated in the movable sinker apparatus 1 shown to (a). Since the sinker member 2 is manufactured by punching with a press, when the torque spring portion 6 is integrated, it can be considered that the sinker member 2 is manufactured by punching at the same time. That is, the torque spring portion 6 is extended to the support portion 2a side as the extension portion 6a from the portion where the spring locking portion 2e is provided in (a), and is roughly composed of the detour portion 6b and the free end portion 6c. It is expected to be U-shaped. However, in order to enable mass production by press punching, a gap s between the outer periphery of the torque spring portion 6 and the inner periphery of the inverted Ω-shaped portion of the sinker member 2 is required to exceed a certain reference, and the torque spring The width w of the part 6 is also required to exceed a certain standard.

FIG. 6 shows a general tendency of the relationship between the displacement and the load in the movable sinker device 1 shown in FIG. In the configuration in which the sinker member 2 and the wire spring 3 shown in FIG. 5 (a) are separated, the relationship between the displacement and the load is within the working load range for properly pushing down the knitting yarn, as shown by the solid line. I have it. As shown in FIG. 5B, assuming that the torque spring portion 6 is integrated, the gap s and the width w must be made larger than in the case of separate bodies. When the gap s increases, the wire length of the torque spring portion 6 becomes shorter than that of the wire spring 3. When the torque spring portion 6 shares the bending deformation with the entire wire length, if the wire length becomes short, the bending load shared by each portion increases. When the width w increases, the cross-sectional secondary moment of the torque spring portion 6 becomes larger than the cross-sectional secondary moment of the wire spring 3, and a large bending force is required for the same bending deformation. As a result, as indicated by a two-dot chain line, the load with respect to the displacement amount shifts to the larger side and may be out of the use load range. Further, the torque spring portion 6 may be damaged beyond the spring material strength limit.
Japanese Patent Publication No. 5-83657 JP 2001-303407 A

  As shown in FIG. 5 (a), if the sinker member 2 and the wire spring 3 are separate bodies, the steps of processing and assembly increase, and the manufacturing operation time becomes long, resulting in an increase in manufacturing cost. The wire spring 3 is difficult to mold and has a large variation in shape and spring characteristics. In particular, when it is difficult to lock the base end portion 3a to the spring locking portion 2e only by a resilient force, fixing using brazing is also performed. However, if the wire spring 3 falls or tilts during brazing, the variation in the relationship between the displacement and the load increases as shown in FIG. If the wire spring 3 is not sufficiently locked by the spring locking portion 2e, the sinker member 2 and the wire spring 3 are easily separated. For example, the movable sinker device 1 may be removed from the needle bed during maintenance of the flat knitting machine. If the sinker member 2 and the wire spring 3 are separated during removal, it is necessary to perform assembly work again.

  As shown in FIG. 5B, if the torque spring portion 6 can be formed integrally with the sinker member 2, it is expected that the problem at the time of separate body will be solved. However, if the torque spring portion 6 is manufactured by stamping at the same time as the sinker member 2, the wire length as a spring is shortened due to the restriction of the gap s, and the thickness as the bending section is reduced due to the restriction of the width w. I can't. For this reason, as shown by a two-dot chain line in FIG. 6, it becomes difficult to keep the relationship between the displacement and the load within an appropriate working load range. Even if there are processing methods that can narrow the gap s and the width w, such as wire cutting, if these processing methods are adopted, mass productivity becomes lower than press processing and processing costs increase.

  An object of the present invention is to provide a movable sinker and a flat knitting machine that can be manufactured at a low cost even if a torque spring portion is integrated with the sinker portion, eliminate individual variations, and shorten the manufacturing work time. It is to be.

In the present invention, the sinker portion is provided with a support portion and an arm portion, and the support portion can be oscillated and displaced about the center of the arc by an arc-shaped guide portion provided near the mouth of the needle bed. The arm portion is a movable sinker that is urged to push down the knitted fabric on the tip side of the arm portion with a torque spring that advances to the mouth and acts on the support portion,
An extending part that branches off from the arm part side and extends to the support part side;
A detour part connected to the extension part and detouring around the circle;
A projecting portion connected to the detour portion and projecting radially outward;
The movable sinker is characterized in that a torque spring portion including a free end portion connected to the projecting portion and parallel to the extending portion is formed integrally with the sinker portion.

In the present invention, the sinker portion has a generally Ω-shape,
The support part is formed to have a predetermined width between the arc-shaped outer periphery and the arc-shaped inner periphery in the middle of the Ω-shape,
The bypass portion of the torque spring portion is formed inside the support portion,
The projecting portion is formed outside the support portion.

Further, in the present invention, the support portion of the sinker portion is supported by a sinker support recess formed near the tip of the needle plate disposed at predetermined intervals on the needle bed,
The free end portion of the torque spring portion has a protrusion that abuts against a pressing portion provided on the needle plate side.

  In the present invention, the sinker portion has a minimum dimension of a gap between the torque spring portion and the sinker portion of 70 to 100% of the plate thickness, and a minimum width of the torque spring portion of 40 to 100% of the plate thickness. It is set to 60%, respectively, and is produced by fine blanking.

  Furthermore, the present invention is a flat knitting machine comprising the movable sinker described in any one of the above.

  According to the present invention, the torque spring portion formed integrally with the sinker portion has an extension portion, a detour portion, and a free end portion, and has a substantially U-shaped shape equivalent to a separate torque spring. Have. Between the detour part and the free end part of the torque spring part, since a protruding part protruding outward in the radial direction is formed, the wire length as a wire spring can be added and extended, As a movable sinker, an appropriate spring bias can be performed. Even if the torque spring part is integrated with the sinker part, the gap and the width of the torque spring part can be increased, so that it can be manufactured at a low cost by stamping the press, and there is no individual variation, and the manufacturing work time Can be shortened.

  Further, according to the present invention, since the protruding portion that adds an extra line length of the torque spring portion is formed outside the support portion of the sinker portion, the inner periphery of the sinker portion is formed with a certain clearance from the outer periphery of the protruding portion. Even if formed, the strength of the support portion of the sinker member can be prevented from being lowered.

  Further, according to the present invention, the sinker support recess is formed near the tip of the needle plate so that the support portion of the sinker portion is supported. Therefore, even if the torque spring portion is integrated with the sinker portion, the torque spring is separated from the sinker portion. Can be used in the same way as the body. Since the free end portion of the torque spring portion has a protrusion that comes into contact with the push-down portion provided on the needle plate side, the position where the free end portion comes into contact with the press portion can be specified to stabilize the operation. .

  Further, according to the present invention, the sinker portion in which the torque spring portion is integrated, the minimum dimension of the gap between the torque spring portion and the sinker portion is set to 70 to 100% of the plate thickness, and the minimum dimension of the width of the torque spring portion. Are set to 40 to 60% of the plate thickness, and are produced by fine blanking. It is possible to align the characteristics of the torque spring portion with high-accuracy punching, and the overall manufacturing cost can be reduced.

  Furthermore, according to the present invention, since the sinker portion of the movable sinker and the torque spring portion are integrated, the variation in characteristics in the movable sinker device used in many flat knitting machines can be reduced. Is stable and high quality can be achieved.

It is a side view which shows the structure of the movable sinker 11 as one Embodiment of this invention. It is a side view which shows the main components combined when the movable sinker 11 shown in FIG. 1 is used with a flat knitting machine. FIG. 2 is a partial side sectional view showing a schematic configuration of a flat knitting machine 20 to which the movable sinker 11 of FIG. 1 is attached. It is side surface sectional drawing which shows schematic structure of the movable sinker apparatus 25 using the movable sinker 11 shown in FIG. It is a partial side view which shows the structure of the conventional movable sinker apparatus. It is a graph which simplifies and shows the relationship between the displacement amount and load in the movable sinker apparatus 1 of FIG.

Explanation of symbols

4 Needle plate 5 Tooth mouth 11 Movable sinker 12 Sinker part 12a Support part 12b Arm part 12g Lack part 13 Torque spring part 13a Extension part 13b Detour part 13c Free end part 13d Protrusion part 13e Protrusion 15 Knitting needle 18 Spacer 20 Flat knitting machine 21 Needle bed 25 Movable sinker device

    FIG. 1 shows a configuration of a movable sinker 11 as an embodiment of the present invention. In FIG. 1 to FIG. 4, portions corresponding to those previously described in FIG. 5 are denoted by the same reference numerals, and redundant description is omitted.

  In FIG. 1, (a) is for a flat knitting machine in which knitting needles are arranged at a rate of 7 G (gauge), ie, 7 pieces per 1 inch (25.4 mm), and (b) is a flat knitting machine of 12 G The movable sinkers 11 are shown respectively. In the movable sinker 11, the sinker portion 12 and the torque spring portion 13 are integrally formed from a metal plate material by press punching by fine blanking. The plate thickness of the inverted Ω-shaped portion including the support portion 12a of the sinker portion 12 and the torque spring portion 13 is, for example, 0.7 mm for 7G and 0.55 mm for 12G. In this case, the plate thickness of the arm portion 12b of the sinker portion 12 is 0.49 mm for 7G and 0.38 mm for 12G. This is because the arm plate thickness of the arm portion 12b of the movable sinker 11 is reduced so as to be arranged at the center of the interval between the adjacent knitting needles, similarly to the arm portion 2b of the sinker member 2. The plate thickness and arm plate thickness are larger for 7G with smaller gauge values.

  Similar to the sinker member 2 shown in FIG. 5A, the sinker portion 12 includes a support portion 12 a having an arcuate outer periphery and an arm portion 12 b extending from the support portion 12 a to one side. A knitting yarn receiving portion 12c and a front edge portion 12d similar to the knitting yarn receiving portion 2c and the front edge portion 2d of the arm portion 2b of the sinker member 2 are formed on the arm portion 12b, respectively. Since the 12G flat knitting machine uses finer knitting yarn than the 7G flat knitting machine, the recess of the knitting yarn receiving portion 12c is smaller for 12G shown in FIG. Except for the difference in the knitting yarn receiving portion 12c and the difference shown in Table 1, the movable sinker 11 has almost the same configuration for 7G and 12G. Hereinafter, the part which has an equivalent structure is demonstrated.

  From an intermediate portion between the support portion 12a and the arm portion 12b of the sinker portion 12 of the movable sinker 11, the torque spring portion 13 extends in the opposite direction of the arm portion 12b. This intermediate portion corresponds to a portion where the spring locking portion 2e is provided in the sinker member 2 shown in FIG. The sinker portion 12 is generally formed in an inverted Ω shape by the intermediate portion, the support portion 12a, and a portion protruding in the opposite direction to the arm portion 12b on the left side of the drawing. The portion protruding in the direction opposite to the arm portion 12b becomes a cam action portion 12f for forcibly retracting the arm portion 12b from the tooth opening under the action of a cam mounted on the carriage of the flat knitting machine. In the torque spring portion 13, a bypass portion 13b that bypasses the virtual circle center 4c is formed on the inner peripheral side of the support portion 12a, following the extension portion 13a that continues to the portion branched from the sinker portion 12. The torque spring portion 13 is formed with a free end portion 13c parallel to the extending portion 13a following the bypass portion 13b. The extending portion 13a, the detour portion 13b, and the free end portion 13c are substantially U-shaped, and are substantially the same as the shape excluding the base end portion 3a of the wire spring 3 of the movable sinker device 1 shown in FIG. It becomes equivalent.

  However, since only such a U-shape is equivalent to the torque spring portion 6 shown in FIG. 5B and the wire length is shortened, as shown by a two-dot chain line in FIG. The relationship between the amount of displacement and the load cannot be obtained. In the torque spring portion 13 of the movable sinker 11, in order to add a line length, a protruding portion 13d is provided between the detour portion 13b and the free end portion 13c. ing. Even if the protruding portion 13d is provided, a recess serving as a missing portion 12g is formed on the sinker portion 12 side so that a gap can be secured. The lacking portion 12g is provided outside the support portion 12a of the sinker portion 12. The upper part of the lacking part 12g is a pressing part 12h that is pressed from above so that the support part 12a does not float.

  The movable sinker 11 in which the sinker portion 12 and the torque spring portion 13 are integrated as shown in FIG. 1 can be suitably manufactured by a press punching method called fine blanking (FB). In fine blanking, plastic working is performed with a mold having a small clearance while restraining the periphery of the punched portion. For restraint, the gap s between the inner peripheral side of the Ω-shaped portion of the sinker portion 12 and the outer peripheral side of the torque spring portion 13 and the width w of the torque spring portion 13 are not less than the minimum dimension according to the plate thickness. The value of is required. In addition, in order to extend the line length as the torque spring part 13 while ensuring the clearance s with respect to the pressing part 12h of the sinker part 12, the free end part 13c is radially inward as the torque spring part 13. A protrusion 13e is formed in the vicinity of the tip and protrudes outward in the radial direction. After punching, finishing is performed as necessary, and heat treatment is also performed.

  As described above, if the plate thickness of the movable sinker 11 for 7G is 0.7 mm, the minimum dimensions of the gap s and the width w are, for example, 0.55 mm and 0.32 mm. This is 79% and 46%, respectively, based on the plate thickness. Similarly, if the plate thickness of the movable sinker 11 for 12G is 0.55 mm, the minimum dimension of the gap s and the width w can be 0.5 mm and 0.3 mm, respectively 91% of the plate thickness and 55%. Thus, it is preferable to set the minimum dimension of the gap s to 70 to 100% of the plate thickness and the minimum dimension of the width w to 40 to 60% of the plate thickness.

  FIG. 2 shows main components combined when the movable sinker 11 shown in FIG. 1 is used on a flat knitting machine. Similar to the sinker member 2 shown in FIG. 5, the movable sinker 11 is housed in a notch 4a formed with a reduced thickness on the tip side of the needle plate 4 provided side by side on the needle bed of the flat knitting machine. A sinker support recess 4b having an arcuate inner peripheral surface is formed at the bottom of the notch 4a, and the support portion 12a of the sinker part 12 is fitted into the sinker support recess 4b. The virtual circular center 4c of the arc of the sinker support recess 4b is the center of the swinging displacement of the movable sinker 11. A pressing portion 4d with which the projection 13d of the torque spring portion 13 abuts is formed at the top of the thinned cutout portion 4a.

  A knitting needle 15 is accommodated in the needle groove between the needle plates 4. The knitting needle 15 is composed of a combination of a needle body 16 and a needle jack 17, for example. The needle jack 17 is further combined with a select jack for needle selection. The needle body 16 is, for example, a latch needle that opens and closes a hook 16a at the tip with a latch 16b, and has a transfer blade 16c at the needle stem portion. The needle jack 17 is formed with a bat 17a that receives the action of a cam mechanism for knitting drive mounted on the carriage of the flat knitting machine.

  Since the movable sinker 11 shown in FIG. 1 is mounted in the notch 4a of the needle plate 4 that forms a needle groove in which the knitting needle 15 is accommodated, a space is created above the knitting needle 15 in the needle groove. A spacer 18 is inserted into this space. As will be described later, the upper portion of the movable sinker 11 is used in a state of being sandwiched between the spacer 18 and the notch 4 a of the needle plate 4.

  FIG. 3 shows a schematic configuration of the flat knitting machine 20 on which the movable sinker 11 is mounted. The needle plate 4 is juxtaposed on the needle bed 21 of the flat knitting machine 20 with an interval in a direction perpendicular to the paper surface. As described above, the upper portion of the movable sinker 11 excluding the support portion 12a, the arm portion 12b and the cam action portion 12f of the sinker portion 12 and the free end portion 13c of the torque spring portion 13 are notched portions of the needle plate 4. 4a and the spacer 18 are sandwiched. In the upper center of the notch 4a, the presser plate 22 penetrates in a direction perpendicular to the paper surface. The arm portion 12b of the sinker portion 12 protrudes toward the mouth opening 5 side. The arm portion 12b performs a turning displacement that advances and retreats with respect to the tooth opening 4 by the swing displacement at the support portion 12a. The protrusion 13e near the tip of the free end portion 13c of the torque spring portion 13 is pressed by the pressing portion 4d of the needle plate 4, and the arm portion 12b is urged by the clockwise torque in the drawing. With this torque, the knitting yarn receiving portion 12 c presses the knitting yarn of the knitted fabric downward of the tooth mouth 5. However, if the drag force based on the tension of the knitting yarn becomes larger than the pressing force due to the spring bias, the knitting yarn receiving portion 12c moves backward from the tooth opening 5 and does not force the knitting yarn. If the cam acting portion 12f is pressed with a cam mounted on the carriage, the arm portion 12b can be forced to retract from the tooth opening 5. In the flat knitting machine 20, a needle bed 21 having a similar configuration is usually opposed to each other with the tooth mouth 5 interposed therebetween, and each needle bed 21 is inclined so that the tooth mouth 5 side rises. Accordingly, the vertical direction at the tooth mouth 5 is not the vertical direction with the needle plate 4 side up and the needle bed 21 side down on the paper surface. Inclined so that is at the top.

  FIG. 4 shows a schematic configuration of the movable sinker device 25 using the 7G movable sinker 11 shown in FIG. (A) shows a lower limit state in which the knitting yarn receiver 12c pushes the knitting yarn below the mouthpiece 5, and (b) shows an upper limit state. In the upper limit state, the knitting yarn receiving portion 12c is pushed up by the knitting yarn, or the arm portion 12b is forcibly pushed up by pressing against the cam action portion 12f. The movable sinker 11 can swing and displace between a lower limit state shown in (a) and an upper limit state shown in (b). This rocking displacement is caused by the outer periphery of the support portion 12a of the sinker portion 12 being supported by the sinker support recess 4b of the needle plate 4 and guided by the arc-shaped inner peripheral surface thereof, and centering on the virtual circular center 4c of the arc. As done. The abutting portion 12h at the end of the sinker portion 12 abuts the lower surface of the presser plate 22 at any portion near the tip so that the support portion 12a does not separate from the sinker supporting recess 4b during the swinging displacement. It touches. In the free end portion 13 c of the torque spring portion 13, a portion of the protrusion 13 e that protrudes outward in the radial direction is in contact with the pressing portion 4 d of the needle plate 4. The abutting position is closer to the tooth opening 5 than the presser plate 22.

  As shown in FIG. 5A, when the wire spring 3 is separate from the sinker member 2 and the base end portion 3a of the wire spring 3 is elastically held by the spring locking portion 2e of the sinker member 2, The spring locking portion 2e occupies a relatively large portion, and there is little room for deforming the parallel free end portion 3c side. In the movable sinker 11, the sinker portion 12 and the torque spring portion 13 are integrated, and it is not necessary to provide the spring locking portion 2e like the sinker member 2, and a space can be provided below the free end portion 13c. Therefore, even if the protrusion 13e protruding radially outward is provided near the tip of the free end portion 13c, the tip of the free end portion 13c can be prevented from coming into contact with the sinker portion 12 side. The top portion of the protrusion 13e is a convex curved surface having a relatively small radius of curvature, can stably make point contact with the pressing portion 4d of the needle plate 4, and can smoothly move along the surface of the pressing portion 4a. .

  In the movable sinker 11 shown in FIG. 1, although the plate thickness of the arm portion 12b is reduced to be different from other portions, the function as the movable sinker device is equivalent even if the entire plate has the same thickness. Can be done. Further, although the sinker support recess 4 b for supporting the support portion 12 a of the movable sinker 11 is provided in the needle plate 4, it can also be provided in the needle bed 21. Although the cam action portion 12f is formed so as to receive a counterclockwise torque from the sinker portion 12 by the push-down action, the cam action portion 12f is illustrated so as to receive a similar torque by the retraction action in the direction opposite to the tooth opening 5. It can also be formed in the vertical direction instead of the horizontal direction. Thus, it goes without saying that changes and modifications to the present invention may be made without departing from the spirit and scope of the present invention.

Claims (5)

A support part and an arm part are provided in the sinker part, and the support part is supported by an arc-shaped guide part provided near the mouth of the needle bed so as to be swingable and displaceable around the center of the arc. The part is a movable sinker that urges the knitted fabric to be pushed downward on the tip side of the arm part by a torque spring that advances to the mouth and acts on the support part,
An extending part that branches off from the arm part side and extends to the support part side;
A detour part connected to the extension part and detouring around the circle;
A projecting portion connected to the detour portion and projecting radially outward;
A movable sinker characterized in that a torque spring part including a free end part connected to the projecting part and parallel to the extending part is formed integrally with the sinker part. The sinker portion has a generally Ω-shape,
The support part is formed to have a predetermined width between the arc-shaped outer periphery and the arc-shaped inner periphery in the middle of the Ω-shape,
The bypass portion of the torque spring portion is formed inside the support portion,
The movable sinker according to claim 1, wherein the projecting portion is formed outside the support portion. The support portion of the sinker portion is supported by a sinker support recess formed near the tip of the needle plate disposed at predetermined intervals on the needle bed,
3. The movable sinker according to claim 1, wherein the free end portion of the torque spring portion has a protrusion abutting against a pressing portion provided on the needle plate side.   In the sinker portion, the minimum dimension of the gap between the torque spring portion and the sinker portion is 70 to 100% of the plate thickness, and the minimum width of the torque spring portion is 40 to 60% of the plate thickness, respectively. The movable sinker according to any one of claims 1 to 3, wherein the movable sinker is set and manufactured by fine blanking.   A flat knitting machine comprising the movable sinker according to any one of claims 1 to 4.

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