WO2006075380A1

WO2006075380A1 - Hosiery machine

Info

Publication number: WO2006075380A1
Application number: PCT/JP2005/000343
Authority: WO
Inventors: Mitsuo Shintaku
Original assignee: Corporation Pearl Star Co., Ltd.
Priority date: 2005-01-14
Filing date: 2005-01-14
Publication date: 2006-07-20

Abstract

[PROBLEMS] To provide a hosiery machine on which various patterns can be knitted by circular knitting at the heel portion and toe portion that are to be formed as tubular portions. [MEANS FOR SOLVING PROBLEMS] An intermediate butt needle (13) having a butt length between those of a short butt needle (11) and a long butt needle (12) is arranged in a region other than the region sectioned into two opposing circular regions and arranged with the short butt needle (11), and long butt needles (12) are arranged contiguously to short butt needles (11) at a predetermined interval. Since first and second level difference portions (31a, 31b) locking, respectively, with short butt needles (11) and long butt needles (12) are formed at the distal end of a center cam (31), various patterns can be knitted at the heel portion and toe portion with short butt needles and intermediate butt needles when the heel portion and toe portion are knitted with short butt needles by forward/reverse reciprocating rotation. When a pattern, especially cardigan rib stitch of protruding and recessed fabric, is knitted at the heel portion and toe portion, the heel portion and toe portion felt chilly most when stockings are worn can be heat insulated by an air layer being formed in the recess of the fabric, and heat insulation can be enhanced by ventilating the air layer being contained in the recess as the foot moves thereby supplying/discharging moisture forcibly.

Description

Specification

Sock knitting machine

Technical field

[0001] The present invention relates to a sock knitting machine for knitting socks by circular knitting, and particularly to a sock knitting machine capable of knitting a pattern on a toe portion and a heel portion.

Background art

FIG. 9 and FIG. 10 are conventional sock knitting machines of this type, and FIG. 9 is a schematic configuration diagram of a cylinder portion in the conventional sock knitting machine, and FIG. 10 shows the needle and cam in FIG. The detailed block diagram of a mechanism part is shown.

In each of the drawings, the conventional sock knitting machine uses a cylindrical knitted fabric by controlling the movement of the plurality of needles 10 arranged in a circular shape in the vertical direction by the cam mechanism 30 as the cylinder 20 rotates. It is the composition which knits socks. The plurality of needles 10 includes a short bat needle 11 disposed on a semicircular portion of the cylinder 20 and a long bat needle 12 disposed on the remaining semicircular portion.

[0003] The cam mechanism 30 is provided with a center cam 30a in the center, left and right mountains 3 la and 3 lb on the left and right of the center cam 30a. A pair of left auxiliary cam 30d and right auxiliary cam 30e are disposed between the peaks 30c and below the center cam 30a, and the left cushion cam 30f and right A cushion cam 30g is provided.

[0004] Next, the knitting operation of the conventional sock knitting machine based on the above configuration will be described. First, the cylinder 20 is rotated in one direction, and the rubber band portion, the leg portion, and the foot portion are successively knitted. A heel portion is knitted between the leg portion and the foot portion, and the heel portion is configured to remove the long bat needle 12 disposed on the half circumference portion of the cylinder 20 (the portion opposite to the key groove of the cylinder 20). Raise the upper surface of the center cam 30a, which is the knitting level, and raise the needle (picker) and lower the needle (dropper) by reciprocating the cylinder 20 with the short bat needle 11 arranged on the remaining half circumference. Reduce stitches or increase stitches.

When the bag portion formed by reducing the stitches and increasing the stitches is knitted as a heel portion in this way, the knitted portion is knitted together. Disclosure of the invention

Problems to be solved by the invention

[0005] Since the conventional sock knitting machine has been configured as described above, there has been a problem that the wheel part and the toe part knitted as the bag part are limited to the plain knitting. That is, in order to perform various patterns (pattern) knitting on the heal portion and the toe portion, the positions of the plurality of knitting needles must be adjusted and controlled to the tarier level state and the tack level state.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sock knitting machine capable of knitting various patterns (patterns) in a circular knitting in a wheel part and a toe part formed as a bag part. And

Means for solving the problem

[0006] The sock knitting machine according to the present invention controls the movement of the short bat needle and the long bat needle arranged in two circular regions in the vertical direction by the cam mechanism as the cylinder rotates. In the sock knitting machine for knitting socks on a tubular knitted fabric, an intermediate bat needle formed longer than the bat length of the short bat needle and shorter than the bat length of the long bat needle is used as the short bat needle. In place of the long bat needle, and the long bat needle is disposed in the region where the short bat needle is disposed adjacent to the short bat needle at a predetermined interval. A first step portion in which the respective bats of the short bat needle and the intermediate bat needle engage with a butt of the intermediate bat needle engages with a tip portion of a center cam formed in a substantially mountain shape. Forming a second step portion, and a short butt needle and the first step portion Between butt needles while movement control in the vertical direction, in the second step is to control travel the length butt needles in the vertical direction.

[0007] Thus, in the present invention, the short bat needle is provided in which the intermediate bat needle having the intermediate bat length between the short bat needle and the long bat needle is divided into two opposing regions having a circular shape. A first step portion and a second step portion in which the long butt needle is disposed at a predetermined interval adjacent to the short bat needle, and the short bat needle and the long bat needle engage with each other. When the heel part and the toe part are knitted with a short butt needle by forward and backward reciprocating rotation, various patterns are used with this short bat needle and the intermediate bat needle. (Pattern) knitting can be performed on the heel part and toe part. Pattern (pattern) knitting on the heel and toe In particular, heel knitting, which has uneven knitted fabric strength, can keep the heel part and toe part most frozen when wearing socks by the air layer formed in the concave part of the knitted fabric, and the air contained in the concave part as the foot moves The layer can be ventilated to forcibly supply and discharge moisture to improve heat retention.

[0008] In addition, the sock knitting machine according to the present invention is configured such that one long butt needle is provided for every three short bat needles in an area where the short bat needles are disposed as necessary. . Thus, in the present invention, since the long bat needles are sequentially arranged with three short bat needles, it is possible to reliably knitting a pattern having a uniform interval on the heel portion and the toe portion.

[0009] In another sock knitting machine according to the present invention, a short bat needle and a long bat needle arranged in two circular regions are moved vertically by a cam mechanism as the cylinder rotates. In a sock knitting machine that controls and knits socks on a tubular knitted fabric, an intermediate bat needle formed longer than the bat length of the short bat needle and shorter than the bat length of the long bat needle is used. A first step portion that is disposed adjacent to the butt needle at a predetermined interval and that engages with a butt of the short bat needle at a tip portion of a center cam formed in a substantially mountain shape in the cam mechanism, and the A second step portion with which the butt of the intermediate butt needle engages, and the short step needle is controlled to move up and down at the first step portion, and the intermediate butt needle at the second step portion. Is controlled to move up and down.

[0010] As described above, according to another embodiment of the present invention, an intermediate bat needle having an intermediate bat length between the short bat needle and the long bat needle is disposed at a predetermined interval adjacent to the short bat needle. In addition, since the first and second step portions where the short bat needle and the intermediate bat needle engage with each other are formed at the tip portion of the center cam, the heel portion and the toe portion can be rotated forward and backward. When knitting with short bat needles, various knitting (pattern) knitting can be performed on the heel portion and toe portion with the short bat needle and the intermediate bat needle. In this heel and toe, knitting patterns (patterns), especially heel knitting that also has uneven knitting strength, can keep the heel and toe that are most frozen when wearing socks by the air layer formed in the knitted fabric recess. As the foot moves, the air layer accommodated in the recess can be ventilated, and the moisture can be forcibly supplied and discharged to improve heat retention.

[0011] In addition, another sock knitting machine according to the present invention is configured such that one intermediate butt needle is disposed for every three short bat needles in an area where the short bat needles are disposed as necessary. . Thus other inventions of the present invention Since the intermediate bat needles are sequentially arranged with three short bat needles, it is possible to reliably knitting a pattern having a uniform interval between the heel portion and the toe portion.

[0012] In addition, in the sock knitting machine according to another aspect of the present invention, the second step portion of the center cam has a circular shape in which the short bat needle, the intermediate bat needle and the long bat needle are disposed as necessary. It is formed to be movable back and forth in the radial direction. As described above, in another aspect of the present invention, the second step portion is formed to be movable back and forth in the radial direction with respect to the short bat needle, the intermediate bat needle and the long bat needle disposed in a circular shape. By controlling the movement of the second step portion, the position and ratio of the flat knitting (Plain Stitch) and the float knitting (Float Stitch) can be arbitrarily set, and the knitting operation can be executed. Socks can be knitted.

[0013] In addition, in another sock knitting machine according to the present invention, if necessary, the second step portion of the center cam is moved backward to the position without the long bat needle being supplied. is there. As described above, according to another aspect of the present invention, the second stepped portion is moved backward to the position without the engagement of the long butt needle. Therefore, the movement control of the second stepped portion is performed. As a result, the position and ratio of the flat knitting and the float knitting can be arbitrarily set and the knitting operation can be executed, and socks with various sock patterns and knitting structures can be knitted.

BEST MODE FOR CARRYING OUT THE INVENTION

[First embodiment of the present invention]

Hereinafter, a sock knitting machine according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a schematic configuration diagram of a cylinder portion in the sock knitting machine according to the present embodiment, FIG. 2 is a cross-sectional view taken along the line AA of the sock knitting machine in FIG. 1, and FIG. 3 is a cam mechanism part of the sock knitting machine in FIG. FIG. 4 is a front view of the cam mechanism part of the sock knitting machine in FIG. 2, and FIG. 5 is a detailed view of the yarn feeding mechanism of the sock knitting machine in FIG.

[0015] In each figure, the sock knitting machine according to the present embodiment includes a plurality of short bat needles 11 arranged in a semicircular portion 20a around the outer periphery of the cylinder 20, and three short bat needles 11. The short bat needle 11 is arranged adjacent to each other, and the bat length L of the short bat needle 11 is formed by a long butt length L2, and the short bat needle 11 and the long bat needle 12 are arranged. An intermediate bat needle formed with a bat length L3 (L1 <L3 <L2) shorter than the bat length L2 of the long bat needle 12 in a semicircular portion 20b at a position facing the outer periphery of the cylinder 20 provided 13 and outside of the cylinder 20 A short butt needle 11, a long bat needle 12 and an intermediate bat needle 13 which are each arranged in a circular shape around the periphery, and a cam mechanism 3 which controls the movement of the cylinder 20 in the vertical direction as the cylinder 20 rotates. The sock is knitted on the tubular knitted fabric as the toe needle 11, the long bat needle 12 and the intermediate bat needle 13 move in the vertical direction.

[0016] The cam mechanism 3 includes a center cam 31 that is disposed at an upper center portion and is formed in a substantially mountain shape. The short bat needle 11 is attached to the distal end portion of the base 3 la of the center cam 31. A first step portion 31b with which the bat 13a of the intermediate bat needle 13 engages and a second step portion 31c with which the bat 12a of the long bat needle 12 engages, and the first step portion The short bat needle 11 and the intermediate bat needle 13 are controlled to move up and down at 3 lb, and the long bat needle 12 is controlled to move up and down at the second step portion 31c.

In addition to the center cam 31 formed at the center upper part, the cam mechanism 3 is provided with a left degree mountain 32 and a right degree mountain 33 on the left and right sides of the center cam 31. A pair of left auxiliary cams 34 and right auxiliary cams 35 are disposed between the right degree mountain 33 and below the center cam 31, and the left cushion cam 36 is provided below the left degree mountain 32 and right degree mountain 33, respectively. And the right cushion cam 37 is arranged.

Next, the knitting operation of the sock knitting machine according to the present embodiment based on the above configuration will be described. First, the cylinder 20 is rotated in one direction, and the mouth rubber part, the leg part, and the foot part are successively knitted. After the rubber band portion is knitted, the leg portion and the foot portion are provided with two kinds of front yarn and back yarn supplied from a front yarn thread 51 and a back yarn back passage 52 disposed above the plate 6. Using the yarn, the cylinder 20 is rotated in the forward rotation direction (see Fig. 5), and the ground knitting is knitted by spiral knitting (Spiral Stitch). In the knitting of the ground knitting, the front yarn and the back yarn are simultaneously shortened. 3 of the 4 intermediate bat needles 13 are hooked on the bat needle 11 and the front and back threads are hooked by the control of the pattern knitting mechanism (not shown). Float Stitch is performed with only one of the back yarns tucked into the hook as a float with one of the four on the hook positioned on the back of the hook.

[0019] As shown in FIGS. 5 (A) and 5 (B), a heel portion is continuously provided between the leg portion and the foot portion, and a semicircular portion 20a of the cylinder 20 is provided. The knitting is performed by alternately performing forward and reverse reciprocating rotation. This heel part is a non-knitted intermediate bat needle 13 disposed in the semicircular part 20b of the cylinder 20. The short butt needle 11 and the long bat needle 12 which are raised to the upper surface of the cam mechanism 3 which is the level and are arranged in the remaining semicircular portion 20a are positioned at the knitting level. With 20 forward and reverse reciprocating rotations, needle up (picker) and needle down (dropper) are performed! ヽ By reducing or increasing the stitches knitted by this short bat needle 11 and long bat needle 12 A bag-like knitted fabric is formed.

The knitted fabric of the heel portion is knitted so as to form a vertical stripe ridge portion similar to the leg portion and the foot portion. As shown in FIG. 2, the vertical stripe ridges raise the short butt needle 11 to the L10 level at the first step 31b, hook the front and back threads on the short bat needle 11 (hook), The long butt needle 12 is maintained at the L20 level by the second step portion 31c, and the long bat needle 12 is knitted by hooking only the back thread (hook).

[0020] In a specific knitting operation of the heel portion, the short bat needle 11 performs flat knitting with both the front yarn and the back yarn being tacked to the hook by the forward and reverse reciprocating rotation of the cylinder 20. On the other hand, the long bat needle 12 performs floating knitting with the front yarn positioned on the back surface of the hook by the forward and reverse reciprocating rotation of the cylinder 20 and with only the back yarn tacked on the hook.

[0021] While the short bat needle 11 and the long bat needle 12 perform a knitting operation, a short bag positioned at the end of the half circumference (arc) portion by a needle raising picker (not shown) with forward and reverse reciprocating rotation. The toe needle 11 or the long bat needle 12 is alternately raised left and right to the same non-knitting level as the intermediate bat needle 13, and the knitting range by the short bat needle 11 and the long bat needle 12 is narrowed to reduce the stitches. When the heel portion reaches the bottom of the bag shape (the portion of the knitting range is the number of the narrowest course) due to this mesh reduction action, the narrowest course arc partial force is forward and backward reciprocating rotation, contrary to the knitting operation. Then, the short bat needle 11 or the long bat needle 12 located at the extreme end is alternately lowered to the knitting level to alternate the left and right to widen the knitting range and increase the stitches.

[0022] Even in the knitting of the bag-like heel portion by forward and reverse reciprocating rotation as described above, the short butt needle 11 is set to the knitting level by the first step portion 31b of the center cam 31, and the long bat needle 12 is set to the center cam 3 1. By maintaining the knitting level from the second step portion 31c, a floating knitting can be formed, and the leg portions and the heel portions of the same vertical stripes that are continuously knitted on the heel portion can be formed continuously and integrally. . In addition, although the heel part knitted with this bag-like knitted fabric was described, the toe part continuously knitted from the foot part is the same heel part as the floating knitting part of the foot part, like the heel part. Minutes can be knitted continuously and integrally.

[0023] (Second Embodiment of the Present Invention)

Hereinafter, a sock knitting machine according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a schematic configuration diagram of a cylinder portion in the sock knitting machine according to the present embodiment, FIG. 7 is a cross-sectional view taken along line B-B of the sock knitting machine in FIG. 6, and FIG. 8 is a cam mechanism of the sock knitting machine in FIG. It is operation | movement explanatory drawing.

In each of the drawings, the sock knitting machine according to the present embodiment includes a plurality of short bat needles 11 disposed in the semicircular portion 20c on the outer periphery of the cylinder 20, and the short bat needles 11 are disposed. A plurality of long butt needles 12 disposed in the semicircular portion 20d and a position where one of the three short notch needles 11 is sandwiched between the long butt needles 12 at positions opposite to the outer periphery of the cylinder 20 An intermediate bat needle 13 formed with a bat length L3 (L1 <L3 く L2) longer than the bat length L1 of the short bat needle 11 and shorter than the bat length L2 of the long bat needle 12. As the cylinder 20 rotates, the cam mechanism 3 and the cam control mechanism 4 control the movement of the short bat needle 11, the long bat needle 12 and the intermediate bat needle 13 arranged in a circle around the outer periphery of the cylinder 20 in the vertical direction. The sock is knitted on the tubular knitted fabric.

[0025] The cam mechanism 3 includes a center cam 31 that is disposed at an upper center portion and is formed in a substantially mountain shape. The center cam 31 includes a base portion 311 and a movable portion 312 at a tip portion. A first step portion 31b with which the butt 11a of the short bat needle 11 engages and a second step portion 31c with which the bat 13a of the intermediate bat needle 13 engages are formed, and the first step portion 31b The short bat needle 11 is controlled to move in the vertical direction, and the intermediate butt needle 13 and the long bat needle 12 are controlled to move in the vertical direction by the second step portion 31c.

[0026] The cam control mechanism 4 has an extension rod 42 whose one end is fixed to the back side of the movable piece 312 of the cam mechanism 3, and is fixed to the base 311 through the extension rod 42 (not shown) The fixed support piece 43, the pressing panel 44 disposed by inserting the extension rod 42 between the fixed support piece 43 and the movable piece 312 and the other end side of the extension rod 42 A drive cylinder 41 is provided that is freely supported and that controls the extending and retracting of the extending rod 42 by air pressure or hydraulic pressure as the cylinder 20 rotates.

In addition to the center cam 31 formed at the center upper portion, the cam mechanism 3 includes the center cam 31. A left mountain 32 and a right mountain 33 are arranged on the left and right of one cam 31, and a pair of left auxiliary cam 34 and right auxiliary are located between the left mountain 32 and the right mountain 33 and below the center cam 31. A cam 35 is disposed, and a left cushion cam 36 and a right cushion cam 37 are disposed below the left degree mountain 32 and the right degree mountain 33, respectively.

[0028] Next, the knitting operation of the sock knitting machine according to the present embodiment based on the above configuration will be described. First, the extension rod 42 is immersed by the drive cylinder 41 of the cam control mechanism 4 so that only the first step portion 31b is formed in the cam mechanism 3. In this state, the cylinder 20 is rotated in one direction. The rubber band part, the leg part, and the foot part are knitted successively. After the logo part is knitted, the leg part and the foot part are rotated by rotating the cylinder 20 in the forward rotation direction using two kinds of front and back threads, and the ground part is made of the front and back threads. At the same time, it is knitted with spiral knitting (Spiral Stitch) by hanging it on the short bat needle 11, long bat needle 12 and intermediate bat needle 13, and the vertical stripe pattern part that becomes the heel part is one side floating knitting (Fioat Stitch), the other The flat stitch (Plain Stitch) is formed on the back, and one heel part is formed every 3 or 4 wales, and the vertical stripe force S is continuously formed.

[0029] A heel portion is knitted between the leg portion and the foot portion, and the heel portion has an upper surface of the cam mechanism 3 in which the long bat needle 12 disposed in the semicircular portion 20d of the cylinder 20 is at a non-knitting level. The short bat needle 11 and the intermediate bat needle 13 arranged on the remaining semicircular portion 20c are raised (picker) and lowered (dropper) by forward / reverse reciprocating rotation of the cylinder 20 to reduce the stitches. A bag-like knitted fabric is formed by performing stitching or increasing the number of eyes. The knitted fabric of the heel portion is knitted so as to form a vertical stripe heel portion similar to the leg portion and the foot portion.

[0030] During a specific knitting operation of the heel portion, the cam control mechanism 4 cams the first step portion 31b and the second step portion 31c by causing the drive rod 41 to project the extension rod 42. The state is as shown in mechanism 3. In this state, the short bat needle 11 performs flat knitting with both the front yarn and the back yarn being tacked to the hook by the forward and reverse reciprocating rotation of the cylinder 20. On the other hand, the intermediate bat needle 13 performs a floating knitting with the front yarn positioned on the back surface of the hook by forward and reverse reciprocating rotation of the cylinder 20 and with only the back yarn tacked on the hook.

[0031] While the short bat needle 11 and the intermediate bat needle 13 perform the knitting operation in this way, the needle lift picker (not shown) is rotated by the needle up and down reciprocating rotation, and the semicircular (circular arc) semicircular portion 20c end The short bat needle 11 or the intermediate bat needle 13 located at the center is alternately raised to the same non-knitting level as the long bat needle 12 on the left and right sides, and the knitting range by the short bat needle 11 and the intermediate bat needle 13 is narrowed to reduce the number of stitches. I do. When this bottom-reducing action reaches the bag-like bottom of the heel (the knitting range is the number of the narrowest course), conversely to the knitting operation, the forward and backward reciprocating rotation from this narrowest course arc part occurs. Then, the short bat needle 11 or the intermediate bat needle 13 located at the extreme end is left and right alternately to lower the needle to the knitting level, and the knitting range is expanded again to increase the stitch.

(Another embodiment of the present invention)

In the above-described embodiment, the short bat needle 11 and the long bat needle 12 for knitting the heel portion and the toe portion of the sock are semicircular portions 20a (or the short bat needle 11 and the intermediate bat needle 13 are semicircular portions. The force provided in 20c) The force may be arranged in a semicircular or more (or less) region in the outer periphery of the cylinder 20.

Further, the heel portion and the toe portion can be formed by other knitting such as pearl knitting in addition to the floating knitting.

Brief Description of Drawings

FIG. 1 is a schematic configuration diagram of a cylinder portion in a sock knitting machine according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line AA of the sock knitting machine in FIG.

3 is an enlarged view of a cam mechanism portion of the sock knitting machine in FIG. 2.

4 is a partial front view of the cam mechanism of the sock knitting machine in FIG. 2. FIG.

FIG. 5 is a detailed view of a yarn feeding mechanism of the sock knitting machine in FIG. 2.

FIG. 6 is a schematic configuration diagram of a cylinder portion in a sock knitting machine according to a second embodiment of the present invention.

[Fig. 7] A-A cross section of the sock knitting machine in Fig. 6,

8 is an operation explanatory view of the cam mechanism of the sock knitting machine in FIG. 7.

FIG. 9 is a schematic configuration diagram of a cylinder portion in a conventional sock knitting machine.

FIG. 10 is a detailed configuration diagram of a needle and cam mechanism portion in FIG.

Explanation of symbols 30 cam mechanism

Cam control mechanism

plate

0 needle

1 short bat needle

1a, 12a, 13a

2 long bat needle

3 Intermediate bat needle

0 cylinder

a, 20b, 20c, 20d Semicircular part a, 31 Center cam b, 32

c, 33

1a, 311 base

1b, first step

1c Second step

Left auxiliary cam

Right auxiliary cam

, 36 Left cushion cam, 37 Right cushion cam 1 Drive cylinder

Extension rod

Fixed support piece

Press panel

Front thread path

Back yarn thread path

2 Moveable piece

Claims

The scope of the claims

[1] The short bat needle and the long bat needle arranged in two circular areas are controlled to move up and down by the cam mechanism along with the rotation of the cylinder, socks on the tubular knitted fabric In sock knitting machines

An intermediate bat needle formed longer than the bat length of the short bat needle and shorter than the bat length of the long bat needle is disposed in place of the long bat needle in the region where the short bat needle is located, and the long bat needle is The short bat needle is disposed in a region adjacent to the short bat needle at a predetermined interval,

A first step portion that engages each butt of the short notch needle and the intermediate butt needle and a butt of the intermediate butt needle are engaged with a tip portion of a center cam formed in a substantially mountain shape in the cam mechanism. Forming a second stepped portion,

In addition to controlling the movement of the short bat needle and the intermediate bat needle in the vertical direction at the first step portion, the movement control of the long bat needle in the vertical direction is performed in the second step portion.

A sock knitting machine.

[2] In the sock knitting machine according to claim 1,

One long bat needle is disposed for every three short bat needles in the region where the short bat needle is disposed.

A sock knitting machine.

[3] The short bat needle and the long bat needle arranged in two circular areas are controlled to move up and down by the cam mechanism along with the rotation of the cylinder, socks on the tubular knitted fabric In sock knitting machines

An intermediate bat needle formed longer than the bat length of the short bat needle and shorter than the bat length of the long bat needle is disposed adjacent to the short bat needle at a predetermined interval,

A first step portion that engages the bat of the short bat needle and a second step portion that engages the bat of the intermediate bat needle at a tip portion of a center cam formed in a substantially mountain shape in the cam mechanism. Forming part with

The short butt needle is controlled to move up and down at the first step portion, and the intermediate butt needle is controlled to move up and down at the second step portion. A sock knitting machine.

[4] In the sock knitting machine according to claim 3,

In the area where the short bat needle is disposed, one intermediate bat needle is disposed for every three short bat needles.

A sock knitting machine.

[5] In the sock knitting machine according to claim 3 or 4,

The second step portion of the center cam is formed to be movable back and forth in a circular radial direction in which the short bat needle, the intermediate bat needle and the long bat needle are disposed.

A sock knitting machine.

[6] In the sock knitting machine according to claim 5,

The second step portion of the center cam moves backward to the V ヽ position where the long butt needle does not supply.

A sock knitting machine.

[7] In the sock knitting machine according to claim 5,

The second step portion of the center cam advances the forward movement to a position where the intermediate butt needle is engaged.

A sock knitting machine.