JP2869119B2 - Automatic stitch adjustment device for knitting machines - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for automatically adjusting stitches in a knitting machine.

[Related Art] Generally, stitch adjustment of a knitting machine is performed by moving a stitch cam via a movable support member by eccentricity of a screw or a rotating cam, and then locking the screw or the rotating cam by a locking means. It has become. Usually, these operations are performed manually, but in recent years, a method of adjusting stitches using a rotary actuator has been proposed.

[Problems to be Solved by the Invention] Adjustment of stitches by the above-mentioned artificial operation is complicated, and can be handled only by skilled persons. Further, in the case of a method using a rotary actuator, the apparatus itself is large in size, so that it cannot be used for a knitting machine or the like having multiple yarn feeders.

The present invention has been made in order to solve these problems, and an object of the present invention is to provide an automatic stitch adjusting device for a knitting machine that enables a multi-thread feeder.

[Means for Solving the Problems] An automatic stitch adjusting device in a knitting machine according to the present invention comprises:
A plurality of knitting needles, a cylinder accommodating the knitting needles in the needle grooves, a plurality of lasing cams for raising the knitting needles, a plurality of stitch cams for lowering the knitting needles, and the plurality of stitch cams are controlled by one control motor. Means,
An automatic stitch adjusting device for a knitting machine having a means for setting a stitch cam at a specific position, wherein the means for setting the stitch cam at the specific position includes a stitch cam control member movably supporting the stitch cam, and a stitch cam. It is characterized by comprising means for positioning the control member, means for clamping the switch cam control member, and means for opening and closing the clamp means.

The means for controlling the plurality of stitch cams with one control motor includes, for example, a stitch cam control member for movably supporting the stitch cam, and means for transmitting power from the control motor to the stitch cam control means.

[Operation] According to the present invention, since a plurality of stitch cams can be controlled by one control motor, stitch adjustment of a complicated knitting machine having a large number of yarn feeders can be automated.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings with respect to a circular knitting machine.

FIG. 1 is a sectional view of a main part of a knitting machine. In FIG. 1, reference numeral 1 denotes a cylinder. On the outer periphery of the cylinder 1, there are a large number of needle grooves 1a extending in the axial direction arranged in a circle, and a knitting needle 2 slidable in the vertical direction is accommodated in the needle grooves 1a.

Each knitting needle 2 has at least one actuation bat.
In this embodiment, a lasing butt dedicated to the lasing cam 9 is used.
2a and a stitch butt 2b dedicated to the stitch cam 10 are provided.

The lasing cam 9 is arranged on the cam holder 8 facing the cylinder 1 and serves to raise the knitting needle. The stitch cam 10 is attached to a movable support member 11 which can be adjusted in the vertical direction in the cam holder 8, and has a function of lowering the knitting needle 2 raised by the lasing cam 9 while receiving yarn supply to a loop forming point. The stitch size is determined by the amount of the knitting needle 2 pulled down by the stitch cam 10.

Above the movable support member 11, a gap removing means is inserted. The gap removing means includes, for example, a coil spring 13, which is housed in a hollow cylindrical member or a square groove member 8a of the cam holder 8. The coil spring 13 is to assist in moving the movable support member 11 downward,
The movable support member 11 is constantly pressed downward. A groove 11a connected to a stitch cam control member 17 (described later) is provided below the movable support member 11.

As another method for removing the gap, although not shown, an air cylinder or an oil damper may be used.

The cam holder 8 is supported by the first cam ring 4. A male screw 5 and a pulley 6 for adjusting the moving amount of the stitch cam 10 are incorporated in the first cam ring 4. A positioning member 15 that moves up and down in accordance with the rotation of the pulley 6 and a female screw guide plate 16 are incorporated in the male screw 5. A stitch cam control member 17 on which the positioning member 15 acts is also incorporated in the first cam ring 4.

At the lower end of the stitch cam control member 17, a clamp means, for example, a clutch 20, for capturing and releasing the same is provided. As shown in FIGS. 5 and 7, the clutch 20 is composed of two arms 20a and 20b, and has a catch portion 20c for clamping the stitch cam control member 17 at the tip.
A spring 43 is attached to the root side of the two arms 20a and 20b, and assists in closing the arms.

As shown in FIGS. 4 and 6, the first lever holder 18 is attached to the bottom surface of the clutch 20 by a common shaft 38. The lever holder 18 has a rotatable first lever 19 incorporated therein. The female screw guide plate which opens and closes the clutch 20 and guides the vertical movement of the stitch cam control member 17 by the rotation of the first lever 19.
Acting on 16, clamps stitch cam control member 17.
The first lever 19 has a substantially triangular shape when viewed from a plane, and a cam contact member 19b is rotatably mounted near each vertex by a mounting shaft 19a.

As shown in FIG. 1, a second cam ring 4
A cam ring 22 is provided. The second cam ring 22 incorporates a pair of control pins 23a and 23b and an actuator acting on these pins, for example, a seesaw lever 24 and a solenoid 25. The control pins 23a and 23b move up and down by the action of the solenoid 25, but the control pins always move in the opposite direction by the action of the seesaw lever 24.

A motor 26 for controlling the rotation of the pulley 6 is fixed to the knitting machine main body (see FIGS. 1 and 15), and a belt 27 is mounted on the pulley 6. The belt 27 is preferably a perforated belt or a toothed belt to prevent slippage. The belt 27 has an origin mark 28 indicating the origin.

A means for confirming the origin when controlling the motor 26, for example, a sensor 29, is fixed to the second cam ring 22, and corresponds to the origin mark 28 of the belt 27. By confirming this origin before control, stable control can always be ensured.

The rotation of the cylinder 1 is effected by a gear ring 30 at its lower part. A moving plate 31 movable in the radial direction is provided at one position on the upper surface of the gear ring 30. Further, on the gear ring 30, a gear ring for controlling the movement of the moving plate 31 is provided.
A second lever holder 32 fixed to 30 and a second lever 34 are rotatably mounted in a recess 32a at the bottom thereof (see FIGS. 2 and 3). The second lever 34 has a substantially triangular shape when viewed from a plane, and has a projection 37 serving as a fulcrum on the upper surface.
a has a projection 37 at the bottom. A first operating cam 35 and a second operating cam 36 acting on the first lever 19 are fixed behind the moving plate 31 (center side of the knitting machine).

When power is supplied to solenoid 25, control pin 23a
Press down on the control pin as shown in FIG.
The second lever 34 engaging with 23a rotates in the outer peripheral direction (the direction of the arrow), and the projection 37 of the second lever 34 inserted into the elongated hole 33 of the moving plate 31 pulls the moving plate 31 in the outer peripheral direction. When the moving plate 31 is pulled out in the outer peripheral direction, the first lever 19 acts on the first operating cam 35.

It is the second operating cam 36 that restores the first lever after the first lever 19 has acted.

FIG. 4 shows the relationship between the clutch 20 and the first lever 19. A small steel ball 40 is formed on the circumference of the flange 39 on the shaft 38 of the first lever 19.
Is arranged. Depressed portion of clutch 20 and shaft 38
In 41, a large steel ball 42 is inserted at one position. In this positional relationship, the first lever 19 is in a positional relationship when the second operating cam 36 operates. At this time, the large steel ball 42 is free as shown in FIG.
The arms 20a and 20b clamp and fix the stitch cam control member 17 by the force of the spring 43 on the end surface of the arm 20a.

FIG. 6 shows a state in which the first operating cam 35 is actuated. The rotation of the shaft 38 pushes the large steel ball 42 out of the shaft 38, and comes off the recess 41 of the shaft 38. As a result, as shown in FIG.
Is forcibly opened, the stitch cam control member 17 is free, and this member 17 can be moved in the vertical direction. Therefore, the position of the stitch cam 10 can be adjusted.

FIGS. 8 to 13 show the clutch 20, which is controlled by the first lever 19 and the first and second operating cams 35 and 36.
The relationship between the positioning member 15 and the stitch cam control member 17 is shown.

FIG. 8 also shows a state when the first and second operating cams 35 and 36 operate. Bold lines indicate the arrangement when the second operating cam 36 operates, and this state is normally maintained. FIG. 9 is a sectional view taken along line IX-IX of FIG. When the first operating cam 35 is activated,
It operates according to the flow shown in Figure 13.

FIG. 10 shows the state of the intermediate point of the operation of the first operating cam 35. The clutch 20 is opened with the rotation of the shaft 38, but the guide plate control member 44 fixed to the first lever 19 is shown. Is just before acting on the positioning member 15.
In the process of reaching the position shown in FIG. 11, the guide plate control member 44 moves the tip 15a of the positioning member 15 to the flange 1 of the stitch cam control member 17 while the first operating cam 35 keeps the clutch 20 open.
Then, the stitch cam control member 17 is moved to the height set in advance by the female screw guide plate 16.

Subsequently, the twelfth operating cam 36
As shown, the rotation of the shaft 38 is reversed. The action of the second operating cam 36 at the intermediate point closes the clutch 20 and fixes the stitch cam control member 17.

Subsequently, during the movement of the second operating cam 36 to the position shown in FIG.
Return 15 to its normal position.

14 and 15 are plan views showing a part of a knitting machine having 48 yarn feeders in order to show the operation sequence. For convenience of explanation, the portion indicated by F in the figure is a yarn feeder. That is, F1 is the first yarn feeder, and F48 is the final yarn feeder.

As shown in FIG. 15, a common belt 27 is attached to the pulley 6 of the multiple yarn feeder. It is preferable to provide an idle pulley 45 on the way. By the rotation force of the pulley 6, the positioning member 15 of the multi-yarn feeder can move up and down at the same time.

At the positions of the first and second operating cams 35 and 36 shown in FIG. 14, the 47th yarn feeder (F47) has already passed the operating cam and is in a normal idle state. In the 48th yarn feeder (F48), the first operating cam 3
5 shows that the position of the new stitch cam 10 is being set by the operation of FIG. The first yarn feeder (F1) is
As in the case of the 47 yarn feeder (F47), it stands by in the idle state for the next setting.

When the knitting machine further moves and the operation of the second operating cam 36 is completed at the forty-eighth yarn feeder (F48) (this timing is detected by a knitting machine movement monitoring means (not shown) of the related art). Is set to the idle state, and the control motor 26 performs setting according to the instruction of the stitch amount of the next first yarn feeder (F1).

At this time, the motor 26 can set the stitch amount after confirming the origin by the accompanying sensor 29. By performing this operation, even if the contents of the memory change due to noise or the like, the origin can be reconfirmed, so that there is an advantage that accurate setting can always be performed.

[Effects of the Invention] According to the present invention, the stitch adjustment of a complicated knitting machine having a large number of yarn feeders is automated, so that it is possible to quickly cope with small lot production without requiring skill.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a knitting machine. FIG. 2 is a plan view taken along the line II-II of FIG. FIG. 3 is a sectional view taken along the line III-III of FIG. FIG. 4 is a sectional view showing the relationship between the clutch and the first lever, and FIG. 5 is a plan view thereof. FIG. 6 is a cross-sectional view showing a relationship between the clutch and the first lever, when the first operating cam operates,
FIG. 7 is a plan view thereof. 8 to 13 are plan views showing the relationship between the clutch, the guide plate and the stitch cam control member by the first and second operating cams, and FIG. 9 is a sectional view taken along the line IX-IX of FIG. FIG. 14 and FIG. 15 are a sectional view and a plan view of a part of a knitting machine having a 48 yarn feeder. 1 ... Cylinder 2 ... Knitting needle 6 ... Pulley 8 ... Cam holder 9 ... Raging cam 10 ... Stitch cam 17 ... Stitch cam control member 19 ... First lever 26 ... Motor 27 ... Belt 34 ... … Second lever 35… first operating cam 36… second operating cam

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D04B 15/32-15/36

Claims (2)

(57) [Claims] 1. A plurality of knitting needles (2), a cylinder (1) containing the knitting needles (2) in needle grooves, a plurality of lasing cams (9) for raising the knitting needles (2), and the knitting needles (2). ), Means for controlling the plurality of stitch cams (10) with one control motor (26), and means for setting the stitch cam (10) at a specific position. In the automatic stitch adjusting device for a knitting machine, the means for setting a stitch cam (10) at the specific position includes:
A stitch cam control member (17) for movably supporting the stitch cam (10), a means (15) for positioning the stitch cam control member (17), and a means for clamping the switch cam control member (17) (20) and an automatic stitch adjusting device for a knitting machine, comprising: means for opening and closing the clamp means (20). Means for controlling a plurality of stitch cams by a single control motor;
2. A stitch cam control member (17) for movably supporting the motor, and means (5, 6, 27) for transmitting power from the control motor (26) to the stitch cam control means (17). Equipment.