JPH0610248A - Controller for rocking of movable sinker - Google Patents

Abstract

PURPOSE:To enable the sure operation of a sinker controlling cam with a small- sized driving motor. CONSTITUTION:The objective controller for rocking of a movable sinker is constructed by arranging each knitting needle in a needle groove of a needle bed so as to enable advancing, retreating and sliding, rockably installing the sinker at the tip of the knitting needle and forming a butt passage for operating the butt of the sinker from a lifting cam surface 28 and a lowering cam surface 29 formed in a carriage reciprocating on the needle bed. Furthermore, this controller is constructed by arranging a sinker controlling cam 31 in a part of the lifting cam surface 28 of the butt passage, simultaneously controlling the protruding posture of the sinker controlling cam 31 with a driving unit 39 and thereby controlling the rocking of the sinker so as to engage or disengage a knitting loop from a hook of the sinker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the amount of rocking of a movable sinker provided at the tip of a knitting needle of a flat knitting machine, and more particularly to a device for controlling the lifting amount of a movable sinker. is there.

[0002]

2. Description of the Related Art In a flat knitting machine, when a knitting needle is moved forward and backward by a carriage and a loop hooked on the knitting needle moves together, a new loop is not formed or the loops are not aligned. In order to prevent this, a sinker for pressing the loop hooked on the knitting needle is fixed to the tip of the knitting needle.

However, depending on the type of knitted fabric to be knitted and the state of loops to be knitted, the presence of a sinker may be an obstacle. For that purpose, for example,
As disclosed in Japanese Patent Application Laid-Open No. 10844 and Japanese Patent Application Laid-Open No. 62-223348, a sinker is swingably arranged at the tip of a knitting needle, and a sinker control cam attached to a carriage is used to move the sinker butt portion. There is one that is operated to swing the sinker upward.

In such a swinger of the sinker, the sinker swing amount is constantly controlled by the sinker control cam mounted on the carriage by a fixed swing amount. The amount (depth) of pressing is always constant. Therefore, when it is desired to perform a so-called "close stitch" knitting in which the length of the loop is extremely shortened, the hook at the tip of the sinker becomes an obstacle and the thread is pulled at the side edge of the hook and stretched to cut. However, there was a problem that it was loosened or damaged and it stood up.

Therefore, for example, it is conceivable to increase the amount of protrusion of the sinker control cam as necessary so that the sinker does not interfere with the formation of a knitting machine by utilizing a control device having a structure disclosed in Japanese Patent Laid-Open No. 1-266249. . This JP-A-1
The control device having the structure described in Japanese Patent Publication No. 266249 has
A rack is engraved on an operation plate having a long hole for movement, and this rack is configured to be moved by a pinion gear provided on the output shaft of a pulse motor (drive motor). In order to swing the sinker largely so that the tip of the sinker does not interfere with the knitting, the height of the elongated slot for movement is made large and the sinker control cam is made to project largely.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When the sinker control cam is configured to be largely protruded by utilizing the control device having the structure described in Japanese Patent No. 6249, the pulse motor forming the drive device has a small starting torque, so that the operation plate is operated instantaneously. It is difficult to do so, and there is a problem that the carriage runs without the sinker control cam achieving the desired protrusion amount.

When a reverse torque acts on the pinion gear provided on the output shaft of the pulse motor through the operation plate due to the resistance of the sinker while the carriage is running, the rotation torque of the pulse motor is small. There is also a problem that the pulse motor is easily rotated in the reverse direction in the direction in which the sinker control cam is retracted, so that the amount of swing of the sinker is not constant, which makes it impossible to uniformly knit the "close stitch" knitted fabric.

To cope with this, a large-sized one having a large starting output of a pulse motor may be adopted. In such a case, not only the carriage becomes large, but also a drive for driving the carriage when the carriage becomes large. There is also a problem that the means must be large-scale and high-output, and the initial cost and running cost increase. The present invention has been proposed in view of the above problems, and it is an object of the present invention to reliably operate a sinker control cam with a small drive motor.

[0009]

In order to achieve the above object, a swing control device for a movable sinker according to the present invention has a knitting needle arranged in a needle groove of a needle bed so as to be able to slide back and forth, and a tip of the knitting needle. Of the movable sinker, in which a swinger is provided in a swingable portion, and a butt path for operating a bat of the sinker is composed of a raising cam surface and a lowering cam surface formed in a carriage that reciprocally slides on a needle bed. In the swing control device, a sinker control cam is arranged on the raising cam surface portion of the butt path, and the protruding posture of the sinker control cam is controlled by a drive device so that the loop is locked or unlocked on the sinker hook. It is characterized in that the sinker is swing-controlled as described above.

Further, a drive device for the sinker control cam for controlling the swing of the sinker is provided with a drive motor and a reciprocating motion converting mechanism for converting the rotation of the drive motor into reciprocating motion, and reciprocating motion is converted. Another feature is that the reciprocating motion converting mechanism and the sinker control cam are interlocked so that either the top dead center or the bottom dead center of the mechanism is projected to the maximum extent of the sinker control cam.

[0011]

When a general knitted fabric is formed, the carriage is slid and slid while the sinker control cam does not project from the raising cam surface of the sinker path. Then, the loop held by the knitting needle is held by the hook of the sinker, which is swing-controlled by the raising cam surface and the lowering cam surface of the sinker path in the carriage, so that the knitted fabric having a uniform loop length is knitted. Of.

Next, for example, knitting of a tightly knitted fabric or a state in which the sinker control cam is projected from the retracted state in order to dispel the knitting yarn caught on the hook of the sinker depending on the type of the knitting yarn. In this case, the drive motor of the drive device is started. Then, the rotation of the drive motor is converted into reciprocation by the reciprocation conversion mechanism. When the rotation of the drive motor converted into the reciprocating motion is transmitted to the sinker control cam, the sinker control cam is in a state of largely protruding from the raising cam surface of the sinker path, and largely protrudes from the raising cam surface of the carriage during traveling. With the sinker control cam, the sinker is swung further above the normal raising amount, the sinker hook does not interfere with the loop knitting, and the knitting yarn caught on the sinker hook is cleared. Of.

In this way, when the sinker is swung so as not to interfere with the knitting of the loop, the stitches can be shortened as much as possible, and the unevenness of the loop due to the tight knitted fabric or the catching of the knitting yarn. It is possible to knit a knitted fabric that does not have. When the drive motor for swinging the sinker control cam is started, either the top dead center or the bottom dead center of the reciprocating motion converting mechanism is reached, so that the torque at the start can be extremely small.

When the sinker control cam is pulled out from the protruding state, the drive motor of the drive device is started in the same manner as described above, and the rotation of the drive motor is reciprocated by the reciprocation conversion mechanism. When converted, the rotation of the drive motor converted into the reciprocating motion is transmitted to the sinker control cam, and the sinker control cam is retracted from the protruding state.

Even when the sinker control cam is retracted from the protruding state, the start-up of the drive motor is at either the top dead center or the bottom dead center when the drive motor is started. The torque at that time is extremely small.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment for carrying out the present invention will be described below with reference to the drawings. The flat knitting machine used in this embodiment has a needle bed provided with a large number of knitting needles that are moved forward and backward by a carriage, and is arranged in a front and rear "H" shape in a state where the needle bed gaps of the knitting needles are abutted. A flat knitting machine,
The carriage 1 and the knitting needle 2 which is operated to move back and forth are constructed as shown in FIG.

The knitting needle 2 is a so-called compound needle in which a slider 3 is slidably installed, and a knitting needle main body 5 having a hook 4 formed at its tip, a jack 6 connected to the rear end of the knitting needle main body 5, Each member of a select jack 7, a select spring 8 and a selector 9 is formed in this order above the rear part of the jack 6, and the slider 3 is formed.
Each member of the jack 6, the select jack 7, and the selector 9 is a butt 10, 11, 1 protruding from its upper surface.
2, 13 are moved forward and backward by the corresponding cam group 14 of the carriage 1, and the knitting needle 2 is moved forward and backward.

A thin plate sinker 15 is swingably arranged beside the tip of the knitting needle 2. As shown in FIG. 2, this sinker 15 has a bat 16 on the upper rear side.
And a pivot hole 17 for rotatably supporting the sinker 15 is formed below the butt 16, a stopper portion 18 is provided at the lower end of the central portion, and an upper end portion of the central portion is provided at the lower end portion. Are formed with friction pieces 19, respectively.

Further, a guide portion 20 for guiding the knitting yarn and a hook 21 for locking the knitting yarn are formed at the tip of the sinker 15, and the butt 16 portion of the sinker 15 is formed in the carriage 1. Further, the sinker 15 is operated by the butt path 22 so that the sinker 15 is rotated about the pivot hole 17 as a rotation center.

As shown in FIG. 3, the carriage 1 for operating the rocking of the knitting needle 2 and the sinker 15 is provided with a transfer lock 23 and a transfer lock 23 which are arranged at a substantially central portion of the knitting needle 2 which acts on the butt 11. Above the needle raising cam 24 and the transfer raising cam 25 that acts on the butt 11 of the knitting needle 2 to guide the knitting needle 2 to the stitch passing path between the needle raising cams 24 formed on the left and right sides of the needle raising cam 24. A bat path 2 for forming a cam group 14 including a slider guide cam 26 and the like formed on the above, and operating the bat 16 of the sinker 15 above the cam group 14.
2 is formed.

The butt path 22 is formed at the upper end portion of the carriage 1 by a raising cam surface 28 and a lowering cam surface 29, and is formed at the center (top portion) of the transfer raising cam 25 and on the side of the needle raising cam 24. Swingable sinker control cams 31 are respectively arranged on the raising cam surfaces 28 located on the stitch cams 30.

The sinker control cam 31 disposed on the raising cam surface 28 located at the mountain cam 30 portion swings the sinker 15 upward so that the hook 21 of the sinker 15 can be caught in the loop. The sinker control cam 31 located above the center of the transfer raising cam 25 causes the knitting yarn fed from the yarn feeder (not shown) to be caught on the unnecessary sinker 15 when the carriage 1 is reversed. In order to prevent this, the sinker 15 is swung upward to open the hook 21.

As shown in FIG. 4, the swinging operation of the sinker control cam 31 is performed by rotating the pulse motor (drive motor) 32 attached to the carriage 1 and the output shaft 33 of the motor 32 in FIG. , A reciprocating motion converting mechanism 34 for converting into a vertical linear motion, and an "L" -shaped link for converting the rotation of the output shaft 33 converted into a vertical linear motion by the reciprocating motion converting mechanism 34 into a horizontal linear motion. 35, and a drive device 39 including a sliding plate 37 for transmitting a motion converted into a linear motion in the left-right direction by the link 35 to the operating rod 38 of each sinker control cam 31 to be rocked. .

The sliding plate 37 has a long hole 40 formed in the central portion thereof in the longitudinal direction, and a screw 41 inserted into the long hole 40.
Is attached to the carriage 1 so as to be reciprocally slidable from side to side in the drawing, and the distal end portions of the link 35 and the operating rod 38 are connected to the lower portion of the elongated hole 40. Further, the relationship between the sinker control cam 31 and the reciprocating motion converting mechanism 34 is connected such that the reciprocating motion converting mechanism 34 is at the bottom dead center 42 when the sinker control cam 31 is retracted from the raising cam surface 28 (FIG. 4).

The above-mentioned relationship between the sinker control cam 31 and the reciprocating motion converting mechanism 34 is such that when the mounting direction of the "L" type link 35 is changed, the sinker control cam 31 is raised.
It is also possible to connect the reciprocating motion converting mechanism 34 to the top dead center 43 when retracted from the position 8. Reference numeral 44 in the figure
Is the reciprocating motion conversion mechanism 34 in the state of the top dead center 43,
It is a sensor formed by a proximity switch that detects whether or not the state is at the bottom dead center 42.

The operation of the swing control device for the movable sinker configured as described above will be described below. Assuming that the carriage 1 travels from the left to the right on the needle bed, the butt 11 of the knitting needle 2 has a cam group 14 in the carriage 1.
, The bat 16 of the sinker 15 passes through the bat path 22 from right to left, respectively. When forming a general knitted fabric, the carriage 1 is slid while the sinker control cam 31 projects from the raising cam surface 28 of the sinker path 22.

At this time, the bat 16 of the sinker 15 passing through the bat path 22 has the leading (rightward) crest cam 30.
Since it is pushed down by the sinker control cam 31 arranged above and is operated downward, the sinker 15 is swung upward with the pivot hole 17 as the center of rotation, and the hook 21 opens. A loop is inserted inside. Then, on the lower cam surface 29 of the butt path 22, the sinker 15
3, the sinker 15 is swung downward about the pivot hole 17 as the butt 16 of FIG. 3 is operated upward, and the loop inserted into the knitting needle 2 becomes a regular hook on the hook 21 of the sinker 15. Holds down by a predetermined amount.

In the sinker control cam 31 located above the center of the transfer raising cam 25, the sinker 15 is swung upward in the same manner as described above, the hook 21 is opened, and the knitting yarn supplied from the yarn feeder is fed. Does not get caught on the hook 21 of the sinker 15, so that a knitted fabric having a uniform loop length is knitted.

When the sinker control cam 31 is actuated in a state of protruding from the raising cam surface 28 of the butt path 22 as described above, it is pushed into the sinker control cam 31 by the reaction force of pushing down the bat 16 of the sinker 15. A force in the other direction (upward direction in FIG. 3) acts, and this force acts on the reciprocating motion converting mechanism 34 via the operating rod 38, the sliding plate 37 and the link 35, but the reciprocating motion converting mechanism 34. Is bottom dead center 4
Since the pulse motor 32 is in the second position, the pulse motor 32 is not reversely activated by this reaction force, and the sinker control cam 31 is reliably kept in a state of protruding from the raising cam surface 28 of the butt path 22.

The starting torque of the pulse motor 32 for operating the sinker control cam 31 so as to project from the raising cam surface 28 is either the top dead center 43 or the bottom dead center 42 of the reciprocating motion converting mechanism 34. Therefore, the torque can be extremely small.

Next, when the sinker 15 is swung upward to knit a tightly knitted fabric or the like, the drive motor 32 of the drive device 39 is started, and the rotation of the drive motor 32 is converted into reciprocating motion. The mechanism 34 converts into reciprocating motion. The rotation of the drive motor 32 converted into the reciprocating motion causes the sinker control cam 31 to rotate.
Is transmitted to the link 35, the sliding plate 37, and the operating rod 3.
The respective sinker control cams 31 are retracted from the state shown in FIG. 3 via the raising cam surface 28 of the butt path 22 as shown in FIG.

When the sinker control cam 31 is retracted from the raising cam surface 28 of the butt path 22, the sinker 1 passing through the bat path 22 when the carriage 1 travels.
The bat 16 of No. 5 is not affected by the sinker control cam 31, and the sinker 15 is not rocked. Therefore, since the loop is not pressed by the hook 21 of the sinker 15,
The stitch count can be shortened as much as possible, and a knitted fabric with tight stitch count can be knitted.

The pulse motor 32 is also used when the sinker control cam 31 is retracted from the protruding state.
Since the reciprocating motion converting mechanism 34 is located at either the top dead center or the bottom dead center, the torque required for the startup of 1 is very small. In this way, the knitted fabric having a desired loop length can be knitted by swinging the sinker control cam 31 to swing the posture of the sinker 15 according to the loop length of the knitted fabric and the type of knitting yarn.

[0034]

As described above, the swing control apparatus for a movable sinker according to the present invention is capable of switching operation between the case where the sinker is operated and the case where the sinker is not operated by advancing and retracting the sinker control cam. Therefore, there is an advantage that a knitted fabric having loops can be knitted at the position where the sinker is applied, and a knitted fabric having a tight degree can be knitted when the sinker is inactive.

Further, in the swing control device of the movable sinker, the rotation of the drive motor of the drive device is converted into the reciprocating motion by the reciprocating motion converting mechanism, and the rotation of the drive motor converted into the reciprocating motion is transferred to the sinker control cam. It is transmitted to the sinker control cam so that it can be oscillated, and the start-up of the drive motor is set to either the top dead center or the bottom dead center of the reciprocating motion conversion mechanism. The starting torque can be extremely small.

As a result, even a small drive motor can be activated in an instant and reliably, and the carriage will run in a state where the sinker control cam does not have a desired protrusion amount as in the conventional case. There is an advantage that it can be surely prevented.

Even at the maximum protrusion of the sinker control cam in which a reverse torque acts on the drive motor via the sinker control cam by the reaction force of the sinker during traveling of the carriage,
Since the maximum protrusion time is either the top dead center or the bottom dead center of the reciprocating motion conversion mechanism, the reverse torque component acting on the drive motor at the time of starting the drive motor is extremely small. Therefore, the drive motor is never rotated in the reverse direction.

As a result, displacement of the sinker control cam is prevented, the sinker can be reliably maintained in the inoperative position, and the breakage of loops and the rise of knitting that occur when knitting a tightly knitted fabric is reliably prevented. There is an advantage that can be done.

Further, as described above, since the drive motor for driving the sinker control cam is small in torque and small in size, the carriage can be made compact without increasing the size, and the driving means for driving this can also be used. There is also an advantage that the initial cost and the running cost can be reduced by using a small and small output.

[Brief description of drawings]

FIG. 1 is a side view of a knitting needle.

FIG. 2 is a partial vertical sectional side view for controlling a knitting needle and a sinker.

FIG. 3 is a perspective view of a carriage that controls a knitting needle and a sinker.

FIG. 4 is a plan view showing an outline of a swing control device of a sinker.

[Explanation of symbols]

 1 ... Carriage 2 ... Knitting needle 11 ... Knitting needle butt 15 ... Sinker 22 ... Butt path 28 ... Raising cam surface 29 ... Lowering cam surface 31 ... Sinker control cam 32 ... Drive motor (pulse motor) 34 ... Reciprocating motion conversion mechanism 39 ... Drive device 42 ... Bottom dead center 43 ... Top dead center

Claims (2)

[Claims] 1. A knitting needle is disposed in a needle groove of a needle bed so as to be able to move forward and backward, a swinger sinker is provided at a tip end portion of the knitting needle, and a butt path for operating a butt of the sinker is provided on the needle bed. In a swing controller for a movable sinker, which comprises a raising cam surface and a lowering cam surface formed in a carriage that reciprocally slides, a sinker control cam is provided on the raising cam surface portion of the butt path, and Swing control of a movable sinker characterized in that the sinker control cam is configured to swing control so that the loop is locked or unlocked by the hook of the sinker by controlling the protruding attitude of the sinker cam. apparatus. 2. A sinker control cam drive device for controlling swing of a sinker is provided with a drive motor and a reciprocating motion conversion mechanism for converting the rotation of the drive motor into reciprocating motion, and reciprocating motion conversion. 2. The reciprocating motion converting mechanism and the sinker control cam are interlocked so that either the top dead center or the bottom dead center of the mechanism is projected to the maximum of the sinker control cam. Swing control device for movable sinkers.