JP4390748B2 - Knitting method using circular knitting machine and circular knitting machine - Google Patents

Description

The present invention relates to a knitting method using a circular knitting machine, and a circular knitting machine that can be used to implement this knitting method .
In this specification, “yarn supply switching” includes thread insertion operation and thread removal operation as well as thread switching (change).

  A circular knitting machine (a double machine is an example) has a cylindrical cylinder that can be driven to rotate and a disk-shaped dial that can be rotated integrally with the upper part of the cylinder. A cylinder needle is provided so as to freely move up and down, surrounding the entire circumference of the dial, and a dial needle is provided on the upper surface of the dial so as to be able to move in and out sideways in a state corresponding to each cylinder needle of the cylinder.

When the cylinder and dial rotate together, the cylinder needle moves up and down in a predetermined manner following the cylinder cam that is stationary around the cylinder, and the dial needle follows the dial cam that is stationary on the dial. Performs a predetermined reciprocating movement and performs a knitting operation with these cylinder needles and dial needles.
This type of circular knitting machine is provided with a striper (yarn feeding device) for feeding yarn toward a position where the cylinder needle and the dial needle intersect and perform knitting (knitting position). The stripers are placed at a plurality of locations at predetermined intervals with respect to the outer peripheral portion of the cylinder.

Originally, the striper has a structure in which a predetermined yarn feeding switching operation is performed in accordance with the rotation of the cylinder, following a ring cam integrally provided on the cylinder so as to surround the outer peripheral surface of the cylinder.
In many cases, the cylinder and the dial are provided with cam position switching means for changing the cam path during the knitting of the fabric using normal yarn. Taking a cylinder as an example, the cam position switching means corresponds to a swing cam or needle selector incorporated in the cylinder cam, and the knit position by raising the cylinder needle raising position and the cylinder needle raising position. The cam path switching operation is performed between the upper and lower sides of the tack position by lowering.

The above-described ring cam performs the yarn feed switching operation by the striper with respect to the cylinder needle (of course, equivalent to the dial needle in the dial) that passes through the cam path after switching according to the operation of the cam position switching means. The most important point is to keep the timing in sync.
Conventionally, a striper incorporating an actuator such as a solenoid has been proposed (see, for example, Patent Documents 1 and 2). However, even in such a striper, the yarn feeding switching operation itself is performed by a ring cam that rotates integrally with the cylinder. To be done. The actuator is used only to switch the presence or absence of the operation of the striper, that is, to switch the power transmission state on the striper side with respect to the ring cam between valid and invalid.
JP 2004-204360 A Japanese Patent Laid-Open No. 52-110964

As described above, it is most important for the ring cam to synchronize the timing of the yarn feed switching operation by the striper with the cylinder needle or dial needle that passes through the cam path after switching according to the operation of the cam position switching means. Is being viewed.
By the way, the cylinder cam for moving the cylinder needle up and down and the dial cam for moving the dial needle back and forth are both fixed, and the striper is fixed in a state not affected by the rotation of the cylinder. Therefore, the knitting position formed by the cylinder needle and the dial needle and the relative positioning of the striper are in a fixed relationship.

However, it is possible to switch the yarn feed due to a shift in the operation timing of the cam position switching means that switches the cam path of the cylinder needle or dial needle, a wearer in the internal mechanism of the striper, or a shift in the operation timing of the striper due to fluctuations in frictional resistance, etc. There is a risk of timing variations.
If this yarn feed switching timing is delayed even momentarily, cylinder needles and dial needles that cannot hook the supplied yarn to the hooks will be generated, and this will cause wrinkles in the tubular fabric after knitting, On the other hand, if it is too fast, cylinder needles and dial needles with extra yarn hooked on the hooks are generated, which causes a problem such as abnormal stitches in the knitted tubular fabric.

In order to avoid or correct these problems, the knitting program or thread use must be changed, or the ring cam position must be finely adjusted or replaced relatively frequently.
Not only that, but the following problems occurred when changing the knitting program. That is, since the timing of the yarn feed switching operation of the striper is taken in accordance with the ring cam that rotates integrally with the cylinder, it is not possible for the striper to perform the yarn feed switching operation unless the cylinder is rotating.

  Therefore, in order to cause the striper to perform the next yarn feed switching operation (retry), the cylinder must be rotated so that the next operation instruction position provided on the ring cam must reach the striper. The adjustment of the timing for switching the yarn feeding by the striper requires a waiting time (a time for waiting for the cylinder to rotate by a predetermined angle). Especially in knitted fabrics, etc., the order of thread insertion is determined, so it is necessary to wait in a single order (the rotation angle required for the cylinder increases), resulting in a longer waiting time. There was a problem.

Even in a striper of the type incorporating an actuator (disclosed in Patent Documents 1 and 2, etc.), the yarn feeding switching operation itself is obtained from a ring cam that rotates integrally with the cylinder, and as a result, the same as described above. Problems can arise.
The present invention has been made in view of the above circumstances, and is a knitting machine (of a circular knitting machine) that can perform yarn feeding switching at an appropriate timing with respect to a predetermined knitting needle so that a knitting defect does not occur in a knitted fabric. Another object is to provide a knitting method, a circular knitting machine and a striper device using a flat knitting machine.

In order to achieve the above object, the present invention has taken the following measures.
That is, in the knitting method using the knitting machine according to the present invention, after starting the knitting of the fabric, the knitting operation is temporarily stopped in preparation for the yarn switching, and the yarn feeding state is switched for the predetermined knitting needles during the stopped state. An operation is performed, and after this operation, the knitting operation is resumed under the next designated knitting condition.

As described above, the present invention allows the yarn feeding switching operation to be performed after the knitting machine during the fabric knitting is once stopped, and the yarn feeding switching with respect to a predetermined knitting needle can be performed at an appropriate timing. Therefore, problems such as fabric wrinkles caused by the delayed timing and abnormal stitches of the fabric caused by the earlier timing are prevented.
The “knitting machine” includes not only a circular knitting machine but also a flat knitting machine. Moreover, in the case of a circular knitting machine and a flat knitting machine, there is no limitation on whether it is a double machine or a single machine.

  In the case of a circular knitting machine, a cylindrical fabric is knitted with a cylinder needle that rotates and moves up and down around the cylinder. Therefore, during the fabric knitting, rotation for the main knitting of the cylinder (in short, the purpose of knitting the fabric) The rotation of the cylinder needle is temporarily stopped, and the cylinder is aligned and rotated (a small amount of rotation for the purpose of alignment) while the main knitting is stopped. Align to the proper position, then let the striper execute the yarn feed switching operation by the actuator that is controlled by the control signal, and then rotate the cylinder under the specified rotation condition to do the fabric knitting It will be resumed.

Thus, in the circular knitting machine, stopping the rotation for the main knitting of the cylinder corresponds to obtaining the “stopped state of the knitting operation as the knitting machine”. Since outputting a control signal to the actuator can be performed arbitrarily in time series, this means that the timing of the yarn feed switching operation by the striper can be controlled as desired.
It should be noted that the “stop state” when “rotation for main knitting of cylinders is stopped” includes low-speed rotation that is slow enough to absorb the operation error of the actuator and striper.

On the other hand, in the case of a flat knitting machine, the carriage is reciprocated along the needle bed holding the knitting needle row, and the knitting operation is performed on each knitting needle in the knitting needle row while feeding from the yarn feed switching mechanism provided in the carriage. The fabric is knitted with yarn. Here, the yarn feed switching mechanism provided in the carriage corresponds to a striper of a circular knitting machine.
Therefore, during the fabric knitting, the reciprocating motion for the main knitting of the carriage (in short, the reciprocating motion for the purpose of knitting the fabric) is temporarily stopped, and the carriage alignment movement (position) A small amount of movement for the purpose of alignment), so that the yarn feeding position by the yarn feed switching mechanism of the carriage is appropriate for a predetermined arrangement of knitting needles, and then operated under the control of the control signal The yarn feed switching mechanism is caused to execute the yarn feed switching operation by the actuator, and then the fabric is knitted again by reciprocating the carriage under the next designated moving condition.

  As described above, in the flat knitting machine, setting the carriage reciprocation to the stopped state corresponds to obtaining the “stopped state of the knitting operation as the knitting machine”. Further, since the yarn feed switching mechanism provided in the carriage corresponds to the striper of the circular knitting machine as described above, adjusting the stop position of the carriage can be achieved by adjusting the stop position of the carriage and the yarn feeding position of the yarn feed switching mechanism (striper) in a predetermined arrangement. Will be aligned.

  Note that outputting a control signal to the actuator means that the timing of the yarn feed switching operation by the yarn feed switching mechanism can be controlled as desired, as in the circular knitting machine. In addition, in the “stop state” when the “reciprocation of the carriage is stopped”, the circular knitting machine can include a low-speed movement that is slow enough to absorb an operation error of the actuator or the yarn feed switching mechanism. Is the same as

  In the knitting method using the circular knitting machine, the cylinder needle is positioned after the rotation for the main knitting of the cylinder is stopped. First, the cylinder needle is operated by operating the cam position switching means provided in the cylinder. The cam path that regulates the ascending position is switched. Then, the cylinder needle is rotated until the cylinder needle whose rising position change is enabled by the cam path after the switching reaches the yarn feeding position by the striper. When these are finished, the striper yarn feed switching operation is executed as described above.

In this case, the switching of the raised position of the cylinder needle by the cam position switching means may be performed between the upper and lower positions of the knit position that raises the raised position of the cylinder needle and the tack position that lowers the raised position of the cylinder needle. What is necessary is just to substitute these things as what is functionally equivalent also in a flat knitting machine.
The circular knitting machine according to the present invention includes a cylinder in which a cylinder needle is provided so as to freely move up and down around the entire outer periphery, and a stop accuracy that matches the needle position of the cylinder needle when the cylinder can be rotated and stopped. A cylinder rotating means capable of generating the engine, a striper placed outside the cylinder independently of the rotation of the cylinder, and an operation control means for controlling the cylinder rotating means to control the rotation / stop of the cylinder. Yes.

  The striper is provided with an actuator that enables the yarn feeding switching operation to be executed at an independent timing, and the operation control means includes a cylinder operating state by the cylinder rotating means and a yarn feeding switching operation by the striper actuator. Can be controlled at a predetermined timing. With such a configuration, the knitting method according to the present invention can be implemented.

The cylinder can be provided with cam position switching means for switching the raised position of the cylinder needle. In this case, the operation control means preferably has the following time series program.
That is, first, the cylinder rotating means is controlled to cause the cylinder to stop rotating. Next, the cam position switching means is controlled to switch the raised position of the cylinder needle. At the next timing, the cylinder rotating means is controlled, and the cylinder is rotated so that the cylinder needle, which is effective in changing the raised position, reaches the yarn feeding position by the striper. At the next timing, the striper is controlled to execute the yarn feed switching operation. Further, at the next timing, the cylinder rotating means is controlled to rotate the cylinder based on the next designated rotation condition.

Adopting such a time-series program is intended to make the operation of the cam position switching means (such as the cylinder needle passing through the cam path after switching) and the yarn feeding switching operation of the striper relatively optimal timings. It becomes an important factor.
The circular knitting machine according to the present invention may be implemented as a single machine or a double machine. In the case of a double machine, it is assumed that a dial is provided on the cylinder so as to be rotatable integrally therewith, and a dial needle that performs a knitting operation with the cylinder needle by laterally moving back and forth is provided.

A striper device used in the circular knitting machine of the present invention includes a yarn gripping portion, a yarn carrier that switches between a yarn feeding state and a non-feeding state with respect to the yarn gripping portion, and a cutter portion that cuts the yarn gripped by the yarn gripping portion. A forward feed mechanism that operates the yarn gripping portion, the yarn carrier, and the cutter portion one by one in accordance with a yarn feed switching operation procedure, and an actuator that transmits driving for one operation to the forward feed mechanism based on an electrical control signal have.

By providing the actuator in this way, it can be suitably used for the circular knitting machine according to the present invention.
Further, by providing a progressive feed mechanism, the number of actuators used can be minimized as much as possible (only one can be used). That is, the structure can be simplified, downsized, and the cost can be reduced. Therefore, certainty of operation (suppression of failure) is also obtained, and it becomes possible to prevent a decrease in operating efficiency on the circular knitting machine side regarding maintenance. Note that a plurality of actuators may be used without providing the forward feed mechanism.

The cutter portion including the yarn gripping portion and the yarn carrier may be operable by swinging cam levers provided separately from each other.
The forward feed mechanism includes a carrier cam that is rotatably provided corresponding to the swing input portion of the yarn carrier cam lever, and a cutter cam that is rotatably provided corresponding to the swing input portion of the cutter cam lever. The carrier cam and the cutter cam may be provided with intermittent rotation means that holds the carrier cam and the cutter cam so as to be integrally rotatable at a phase angle based on the order of operation, and assigns them one rotation every predetermined rotation angle.

  In this case, the actuator gives the drive necessary for one operation to the intermittent rotation means of the sequential feed mechanism every time an electrical control signal is received.

  In the knitting method, the circular knitting machine and the striper device using the knitting machine (including a circular knitting machine as well as a circular knitting machine) according to the present invention, the yarn feed can be switched reliably at an appropriate timing with respect to a predetermined knitting needle. Thus, problems such as wrinkles and abnormal stitches in the knitted fabric can be prevented. Further, a wasteful waiting time can be omitted during the knitting of the fabric, and the efficiency of the fabric knitting operation (high productivity of the knitted fabric) can be achieved.

  Further, in the knitting method and the circular knitting machine and the striper apparatus using the knitting machine (including the flat knitting machine as well as the circular knitting machine) according to the present invention, a ring cam is not necessary for causing the striper to perform the yarn feed switching operation, and therefore naturally. In addition, it is not necessary to finely adjust or replace it.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of a circular knitting machine 1 according to the present invention. The circular knitting machine 1 includes a cylindrical cylinder 2 and a disk-shaped dial 3 provided on the upper portion of the cylinder 2. The cylinder 2 and the dial 3 are integrally rotatable about the rotation axis P thereof, and are driven to rotate in one direction by the cylinder rotating means 4.

  In the cylinder 2, a large number of cylinder needles 5 whose longitudinal direction is directed in the vertical direction are arranged so as to surround the entire outer peripheral surface of the cylinder 2, and each cylinder needle 5 is independently held so as to be movable up and down. A lower cam block 6 is provided around the cylinder 2 in a stationary state, and a cylinder cam (not shown) for causing each cylinder needle 5 to move up and down at a predetermined timing on the inner peripheral surface of the lower cam block 6. ) Is provided.

  The dial 3 has the same number of dial needles 9 as the cylinder needles 5 arranged in a radial pattern from the center on the upper surface of the dial 3 with the longitudinal direction directed in the radial direction of the dial 3. It is held in such a way that it can be moved horizontally. An upper cam block 10 is provided in a stationary state on the upper portion of the dial 3, and a dial cam (not shown) for causing the dial needle 9 to move out and in is provided on the lower surface of the upper cam block 10. Yes.

The cylinder needle 5 and the dial needle 9 are positioned so as to alternately cross each other. Accordingly, when the cylinder 2 and the dial 3 are rotated, the cylinder needle 5 and the dial needle 9 are also rotated together, and the cylinder needle 5 is moved up and down following the cylinder cam, and the dial needle 9 is moved out and out along the dial cam. And the knitting position R is formed at the intersecting position between the rising of the cylinder needle 5 and the forward movement of the dial needle 9.

The yarn is fed to the knitting position R, and the tubular fabric W is knitted starting from the knitting position R. The knitted tubular fabric W is hung down through the inside of the cylinder 2 and is taken up by a winding device 13 provided below the cylinder 2 through a suspension frame 12.
The cylinder rotating means 4 is provided with a servo motor or the like as a drive source, and can be stopped with the needle position accuracy of the cylinder needle 5 and the dial needle 9 as necessary from the state in which the cylinder 2 and the dial 3 are rotated. It has become.

The knitting positions R described above are formed at a plurality of locations (for example, 16 locations) in the circumferential direction of the cylinder 2. In order to feed yarns to these knitting positions R, stripers 15 are provided at the same number and the same position on the outer periphery of the cylinder 2. The striper 15 is in a stationary state independent of the rotation of the cylinder 2 or the like.
It is assumed that the cylinder 2 is provided with cam position switching means 17 for enabling the cam path of the cylinder needle 5 to be changed during the cloth knitting, with respect to the cylinder cam in the lower cam block 6. The cam position switching means 17 is a swing cam or a needle selector incorporated in the cylinder cam. The cam position switching means 17 is formed by raising the raised position of the cylinder needle 5 and lowering the raised position of the cylinder needle 5. The cam path is switched between the top and bottom of the tack position.

As shown in FIG. 2 and FIG. 3, which is a cross-sectional view taken along the line AA in FIG. 2, the striper 15 has two main body plates 18 and 19 each having a shape like a boot viewed from the side. The thread grip 22, the yarn carrier 21, and the cutter 20 are projected at a portion corresponding to the toe of the boots by being connected in a superposed manner at intervals.
The thread gripping part 22 is a part that grips or releases the thread end. The yarn carrier 21 has a beak-shaped tip portion, and causes the yarn passed through the yarn feeder 23 (see FIG. 6) provided at the tip portion to approach or separate from the yarn gripping portion 22, thereby This is a part for switching between a yarn feeding state and a non-yarn feeding state with respect to the grip portion 22. The cutter unit 20 is a part that cuts the thread gripped by the thread gripping part 22.

As shown in FIGS. 4 to 7, the striper 15 includes a progressive feed mechanism 25 for causing the yarn gripping portion 22, the yarn carrier 21, and the cutter portion 20 to operate one by one along the operation sequence of yarn feeding switching. Is provided. An actuator 26 for driving the progressive feed mechanism 25 is provided.
That is, the striper 15 can perform a unique yarn feed switching operation (predetermined operations of the yarn gripping portion 22, the yarn carrier 21, and the cutter portion 20) using the actuator 26 as a drive source, and is adopted in a conventional circular knitting machine. Unlike the striper that has been used, the yarn feeding switching operation is not performed as a copying operation based on the ring cam that surrounds the outer peripheral surface of the cylinder 2.

  As shown in FIG. 1, each striper 15 (actuator 26) is electrically connected to the cylinder rotating means 4 via the operation control means 27. In the operation control means 27, the rotation of the cylinder 2 can be stopped or accelerated / decelerated as necessary, and the striper 15 (actuator 26) can be operated at an appropriate timing. Therefore, for example, after the cylinder 2 is completely stopped, the yarn feeding switching operation (particularly the yarn inserting operation) by the striper 15 can be executed.

  As shown in FIG. 3, the forward feed mechanism 25 performs a predetermined operation at a predetermined timing with respect to the cam cam 32 for the yarn carrier 21 and a cam cam 32 for the cutter portion 20 that generates a predetermined operation at a predetermined timing. And a cutter cam 31 for generating The carrier cam 30 and the cutter cam 31 have a main shaft 34 pierced in a skewered manner at the center of rotation so as to cross between the body plates 18 and 19.

Further, the forward feed mechanism 25 has intermittent turning means 35. The intermittent rotation means 35 has a claw gear 36 and a timing cam 37. The claw gear 36 and the timing cam 37 also have the main shaft 34 penetrated in a skewered manner at the center of rotation.
That is, the carrier cam 30, the cutter cam 31, the claw gear 36, and the timing cam 37 are rotatable around a common main shaft 34. The carrier cam 30, the cutter cam 31, the claw gear 36, and the timing cam 37 have a relationship in which a predetermined phase angle is maintained between cam projection positions and claw positions provided on the outer peripheral portions of the carrier cam 30, the claw gear 31, and the timing cam 37. It is connected and can rotate integrally as a whole.

As shown in FIG. 4, the claw gear 36 is provided with a plurality of claws 38 whose inclination is aligned in one direction on the outer periphery thereof, and a pair of drive claws 40 are provided so as to sandwich both outer sides of the claw gear 36. Provided, these drive claws 40 can be engaged with the respective claws 38.
The pair of drive claws 40 are suspended from the upper suspension frame 50 via a pivot 51 and are held so as to be swingable in a direction in which the claws at the lower end are relatively close to and away from each other. It is biased in the direction of relative proximity. The suspension frame 50 can be moved up and down by the actuator 26.

  The actuator 26 can execute each operation based on the electrical control signal. In the present embodiment, a double-acting air cylinder is used downward for the actuator 26. That is, the actuator 26 either pushes the rod end downward (hereinafter referred to as “pushing operation”) or pulls upward (hereinafter referred to as “returning operation”) every time an electrical control signal is received. Do one of the actions.

  Therefore, when the actuator 26 pushes and lowers the suspension frame 50, one driving claw 40 (the left driving claw 40 in FIG. 4) pushes the claw 38 of the claw gear 36 at the lower end of the claw by about one claw pitch. , Push and rotate (1 claw pitch is 60 ° but actual rotation is 52 °). At this time, the other driving claw 40 (the right side in FIG. 4) escapes radially outward so as not to disturb the rotation of the claw gear 36.

When the actuator 26 returns and raises the suspension frame 50, the opposite driving claw 40 (the right driving claw 40 in FIG. 4) engages with the nearest claw 38, and this claw 38 Is slightly rotated in the same direction as above. As a result, the lower end of the original drive claw 40 (left side in FIG. 4) is positioned so that the next claw 38 can be pushed down.
Such pushing operation and returning operation of the actuator 26 are repeated, and the pawl gear 36 partially rotates by one pitch of the pawl 38 for each combination of one pushing operation and returning operation. In the present embodiment, the claw gear 36 is provided with six claws 38. Therefore, the actuator 26 repeats the pushing operation six times while sandwiching the returning operation, so that the claw gear 36 rotates once. Become.

On the other hand, as shown in FIG. 5, the timing cam 37 is provided with a plurality of positioning recesses 55 having a V-notch shape on the outer periphery thereof. A stopper lever 57 having an engaging projection 56 is provided at a position close to the timing cam 37.
The positioning recess 55 provided in the timing cam 37 causes the carrier cam 30, the cutter cam 31, and the timing cam 37 including the pawl gear 36 to overrun due to inertia when the actuator 26 is pushed or returned. It is intended to prevent the occurrence of Accordingly, the number of positioning recesses 55 is ideally set to the total number of pushing operations and returning operations of the actuator 26 (in the case of the present embodiment, it is originally equivalent to 12 locations).

However, the pushing operation and the returning operation of the actuator 26 are close to each other with time, and it can be determined that there are few malfunctions due to vibration and reaction force, and the allocation angle (the space between the outer diameter of the timing cam 37 and the outer peripheral length thereof). In this embodiment, the number of positioning recesses 55 is six.
The stopper lever 57 is swingably held so as to move up and down a portion provided with the engaging projection 56 with respect to a pivot 58 that is installed so as to cross between the body plates 18 and 19. A spring 59 is coupled to the stopper lever 57 so that the engagement protrusion 56 is pressed and urged toward the outer peripheral surface of the cam.

For these reasons, every time the actuator 26 performs a pushing operation (or a returning operation), the stepping and positioning by one pitch by the timing cam 37 are regulated.
As shown in FIG. 6, the yarn carrier 21 is held so as to be swingable so that the beak-shaped tip portion can be moved up and down with respect to a pivot 58 that is installed so as to cross between the body plates 18 and 19. The portion extending from the pivot 58 in the direction opposite to the tip is the cam lever 32. The pivot 58 is the same as that supporting the swinging of the stopper lever 57.

The cam lever 32 is provided with a swing input portion 62 that protrudes toward the carrier cam 30. A copying spring 63 is connected to the cam lever 32 so that the swing input portion 62 is pressed and urged toward the outer peripheral surface of the cam.
The carrier cam 30 is provided with three cam protrusions 64. The number of the cam protrusions 64 is adjusted to be half of the number of pushing operations (ie, six times) for the actuator 26 to rotate the claw gear 36 once. This is because the movement corresponding to the “thread insertion operation” and the movement corresponding to the “thread removal operation” of the yarn carrier 21 are repeated alternately for each combination of the single pushing operation and the return operation of the actuator 26. This is to make it happen.

  The phase angle between the carrier cam 30 and the pawl gear 36 is such that the cam projection 64 pushes down the swing input portion 62 of the cam lever 32 in accordance with the first pushing operation of the actuator 26, and then the actuator 26 performs the returning operation. Even so, the cam protrusion 64 maintains the state in which the swing input portion 62 is pushed down, and the cam protrusion 64 engages with the swing input portion 62 of the cam lever 32 at the moment when the actuator 26 starts the second pushing operation. The relationship is set to cancel (that is, the phase angle).

When the swing input portion 62 of the cam lever 32 is pushed down, as the cam lever 32 swings downward, the yarn carrier 21 raises its tip, and the swing input portion 62 is released. The cam lever 32 swings upward by the copying spring 63, so that the tip of the yarn carrier 21 is lowered.
As shown in FIG. 7 and FIG. 8 which is an exploded view thereof, the cutter unit 20 includes a support main rod 71 having a tip portion formed as a blade receiving portion 70 and a blade receiving portion 70 of the support main rod 71. On the other hand, it has a blade body 73 that is swingably mounted with the head main shaft 72 as a fulcrum, and a cam lever 33 that transmits a cutting operation to the blade body 73.

The blade receiving portion 70 is provided with a blade edge 70a at a lower rearward portion thereof, and the blade body 73 is provided with a blade edge 73a at a lower frontward portion thereof.
The cutter portion 20 is provided with a yarn gripping portion 22 for the blade receiving portion 70 of the support main rod 71. In the thread gripping portion 22, a clamp piece 75 is provided on the opposite side of the blade receiving portion 70 from the blade main body 73.

As with the blade body 73, the clamp piece 75 is swingably held with respect to the blade receiving portion 70 with the head main shaft 72 as a fulcrum. Further, the clamp piece 75 and the blade body 73 are connected via a tie rod 76 at a position where they do not interfere with the blade receiving portion 70 when they are swung, and swing together.
A link pin 77 projects from the clamp piece 75 in parallel with the head spindle 72, and a notch-shaped pin groove 78 is formed at the tip of the cam lever 33 so that the link pin 77 can be sandwiched. It has become.

Further, the cam lever 33 is swingably held so as to move up and down the tip portion provided with the notch-shaped pin groove 78 with respect to the pivot 58 which is constructed so as to cross between the body plates 18 and 19. The swinging of the cam lever 33 gives a cutting operation to the blade body 73.
The pivot 58 is the same as that supporting the swinging of the stopper lever 57 and the cam lever 32 for the yarn carrier 21. The main support 71 is fixed to a main support holder 80, and the main support holder 80 is also attached to one main body plate 19 so as to be swingable around the pivot 58.

  The main body plate 19 has an angle operating portion 82 for bringing a push screw 81 into contact with the main rod holder 80, and a pulling spring 83 (see FIG. 7) for urging the main rod holder 80 against the push screw 81. Therefore, the mounting angle of the supporting main rod 71 with the pivot 58 as a fulcrum can be adjusted by taking out or retracting the push screw 81 of the angle operation portion 82. . Thereby, the height adjustment as the cutter part 20 can be performed. In addition, since the support main rod 71 is movable along the longitudinal direction of the main body plate 19, the position of the cutter unit 20 can be adjusted in the entrance / exit direction.

The cam lever 33 is provided with a swing input portion 85 that protrudes toward the cutter cam 31. A copying spring 86 is connected to the cam lever 33 so that the swing input portion 85 is pressed and urged toward the outer peripheral surface of the cam.
Three cam projections 87 are provided on the cutter cam 31. The number of the cam projections 87 is adjusted to be half that of the number of pushing operations (ie, six times) for the actuator 26 to rotate the claw gear 36 once. This is the same reason as in the case of the yarn carrier 21. For each combination of the one-time pushing operation and the returning operation of the actuator 26, the cutter unit 20 has a motion corresponding to the “thread inserting operation” and a “thread removing operation”. This is because the movement corresponding to "" is alternately repeated.

The phase angle between the cutter cam 31 and the claw gear 36 is such that the cam projection 87 pushes down the swing input portion 85 of the cam lever 33 in accordance with the first pushing operation of the actuator 26, and then the actuator 26 returns. The cam protrusion 87 is disengaged from the swing input portion 85 of the cam lever 33 (ie, the phase angle) as it operates.
When the swing input portion 87 of the cam lever 33 is pushed down, the link pin 77 is pulled by the cam lever 33 as its tip is raised, and the blade main body 73 is moved together with the clamp piece 75 to the head spindle. The blade swings in the direction of opening the blade with 72 as a fulcrum.

When the swing input portion 85 is released, the cam lever 33 swings in the direction opposite to the above by the copying spring 86, so that the clamp piece 75 and the blade body 73 swing in the direction of closing the blade. That is, this movement becomes a cutting operation as the cutter unit 20.
The thread gripping portion 22 has a structure in which the thread is gripped and released between the clamp piece 75 and the support main rod 71 as the clamp piece 75 swings about the head main shaft 72 as a fulcrum. is there. That is, in this yarn gripping portion 22, the clamp piece 75 partially releases the overlapping state with the support main rod 71 as the cutter portion 20 performs the “open” operation, and releases the yarn in this region. On the contrary, when the cutter unit 20 performs the “close” operation, the clamp piece 75 increases the overlapping state with the supporting main rod 71 and grips the yarn in this region.

As is clear from the above detailed description, the circular knitting machine 1 according to the present invention is provided with the cylinder rotating means 4, so that when the rotation of the cylinder 2 and the dial 3 is stopped, the stopping accuracy is set to the cylinder needle. 5 and the needle position accuracy of the dial needle 9 can be obtained.
In the circular knitting machine 1 according to the present invention, since the operation control means 27 is provided, it is possible to set a desired timing as a timing for causing the striper 15 to perform the yarn feeding switching operation. Therefore, the rotation and stop of the cylinder 2, the switching operation status of the cam position switching means 17, the relative positional relationship between the cylinder needle 5 and the striper 15 whose cam path can be switched by the cam position switching means 17, and the cylinder needle 5 If a positive yarn feeder is adopted as the yarn feeding method toward the knitting position R by the dial needle 9 and the relative position relationship with this positive yarn feeder is taken into account, the feeding of the striper 15 is taken into account. The yarn switching operation timing can be determined.

For these reasons, it is also possible to execute the yarn feed switching operation (particularly the yarn inserting operation) by the striper 15 after the cylinder 2 is completely stopped.
Hereinafter, the knitting method according to the present invention will be described based on the case where the circular knitting machine 1 is used. FIG. 9 is a time chart showing “thread removal operation” and “thread insertion operation” by the striper 15 over time, and FIG. 10 to FIG. 13 are operation explanations showing the operation of each part in the striper 15 in an exploded manner. FIG.

  10A to 13B, as common explanation for each figure, (A) is the operation of the yarn carrier 21, (B) is the operation of the yarn gripping part 22 and the cutter part 20, and (C) is the positioning status of the timing cam 37. Are shown as states at the same point in each figure, and they are sequentially shifted with time according to FIGS. Further, the illustration of the claw gear 36 is omitted in order to prevent complication of each figure.

  In FIG. 9, the actuator 26 is in the return (contraction) position at the start position (indicated by the arrow i) of the “thread removal operation”, the yarn carrier 21 is lowered, and the thread gripping section 22 and the cutter section 20 are half-opened. Is in the situation. At this time, the cylinder 2 and the dial 3 temporarily stop the rotation for the main knitting, and the fabric knitting work is temporarily stopped. Normally, the yarn is supplied to the knitting position R under this situation. The start position of this “thread removal operation” (indicated position of arrow i) corresponds to FIG.

Immediately before this situation is reached, the cam position switching means 17 performs a switching operation in advance to switch the cam path of the cylinder needle 5 from the knit position to the tack position. Then, the cylinder needle 5 that has started to enter the cam path after the switching has reached the yarn feedable position by the yarn carrier 21.
From this state, when the “thread removal operation” is entered, the actuator 26 starts to push, the engaging protrusion 56 of the stopper lever 57 is disengaged from the positioning recess 55 of the timing cam 37, and the timing cam 37 starts to rotate. Begins to rise, and the thread gripping portion 22 begins to release, and the cutter portion 20 begins to open.

When the actuator 26 completes the pushing operation (indicated position indicated by an arrow ii in FIG. 9), the yarn carrier 21 finishes rising and removes the thread from the cylinder needle 5, and the thread gripping part 22 and the cutter part 20 are It is already fully open and is ready to refrain from cutting the yarn removed by the yarn carrier 21. This state corresponds to FIG.
Next, the cylinder 2 and the dial 3 move the yarn extending from the tubular fabric W being knitted away from the yarn gripping portion 22 and the cutter portion 20 to increase the tension of the yarn, and the next gripping operation and cutting operation are easy. Partially rotate so that it becomes stable and reliable. However, the number and timing of partial rotations of the cylinder 2 and the dial 3 may be set as appropriate, and are not necessarily performed.

Next, when the actuator 26 performs a return operation (indicated position of arrow iii in FIG. 9), the yarn carrier 21 maintains the raised position, but the thread gripping part 22 and the cutter part 20 are fully closed, and the thread gripping part A gripping operation by 22 and a cutting operation by the cutter unit 20 are performed. This state corresponds to FIG.
As a result, the yarn removing operation is completed for the knitting position R formed by the cylinder needle 5 and the dial needle 9. Therefore, the cylinder 2 and the dial 3 start to rotate under the next designated rotation condition, and the fabric knitting operation is resumed.

After the predetermined fabric knitting operation is performed, when the necessary time for thread insertion comes, the cylinder 2 and the dial 3 stop rotating again, and the fabric knitting operation is temporarily stopped.
Here, when the actuator 26 starts the pushing operation, the yarn carrier 21 descends during the pushing operation, and eventually the yarn gripping portion 22 and the cutter portion 20 start the opening operation (indicated by the arrow iv in FIG. 9). Indicated position). This state corresponds to FIG.

  Thereafter, the actuator 26 performs a return operation at a predetermined timing, and at the stage where the opening operation of the thread gripping portion 22 and the cutter portion 20 is slightly advanced to a half-open state, the cylinder needle 5 and the dial needle 9 are used. The yarn inserting operation is completed for the knitting position R to be formed. Therefore, the cylinder 2 and the dial 3 start to rotate under the next designated rotation condition, and the fabric knitting operation is resumed.

Such a rotation and stop of the cylinder 2 and the dial 3 and a yarn feeding switching operation by the striper 15, a switching operation of the cam position switching means 17, and other ON / OFF operations such as a positive yarn feeding device are repeated thereafter to form a cylindrical fabric. The fabric knitting operation of W (see FIG. 1) is continued.
Since the rotation of the cylinder 2 and the dial 3 and the yarn feed switching operation by the striper 15 are completely separated by the operation control means 27 and can be performed independently, the yarn feed switching is performed accurately and failed. As a result, the problem that a knitted defective part or a wasteful knitted part occurs in the knitted tubular fabric W is solved.

By the way, this invention is not limited to the said embodiment, It can change suitably according to embodiment.
For example, the actuator 26 can be replaced with a solenoid or a motor.

It is the sectional side view which showed one Embodiment of the circular knitting machine which concerns on this invention. It is the side view which showed one Embodiment of the striper used for this invention. It is an AA line expanded sectional view of FIG. FIG. 4 is a view taken along the line CC in FIG. 3. It is a BB line arrow directional view of FIG. FIG. 4 is a view taken along line DD in FIG. 3. FIG. 4 is a view taken along line EE in FIG. 3. It is an exploded view of a cutter part and a thread | yarn holding part (FIG. 7). It is a time chart at the time of operation | movement of the striper used for this invention. It is the side view which showed each part disassembled about 1 of the operation | movement order of the striper used for this invention. It is the side view which showed each part disassembled about 2 of the operation | movement order of the striper used for this invention. It is the side view which showed each part disassembled about 3 of the operation | movement order of the striper used for this invention. It is the side view which showed each part disassembled about 4 of the operation | movement order of the striper used for this invention.

DESCRIPTION OF SYMBOLS 1 Circular knitting machine 2 Cylinder 3 Dial 4 Cylinder rotation means 5 Cylinder needle 9 Dial needle 15 Striper 17 Cam position switching means 20 Cutter part 21 Yarn carrier 22 Yarn grip part 25 Forward feed mechanism 26 Actuator 30 Carrier cam 31 Cutter cam 32 For yarn carrier Cam lever 33 Cam lever for cutter part 35 Intermittent rotation means 62 Swing input part of cam lever for yarn carrier 85 Swing input part of cam lever for cutter part W Cylindrical cloth

Claims (8)

In a knitting method using a circular knitting machine in which a cylindrical fabric (W) is knitted by a cylinder needle (5) that rotates up and down around the cylinder (2), the main knitting of the cylinder (2) is performed during the fabric knitting. The rotation for temporarily stopping is temporarily stopped, and the cylinder (2) is rotated while the main knitting is stopped, so that the cylinder needle (5) in a predetermined arrangement is properly positioned at the yarn feeding position by the striper (15). Next, the actuator (26), which is controlled by the control signal to operate, causes the striper (15) to perform the yarn feed switching operation, and then the cylinder (2) is rotated under the specified rotation conditions. A knitting method using a circular knitting machine, wherein knitting is resumed . The cylinder needle (5) is positioned after the rotation for the main knitting of the cylinder (2) is stopped. First, the cam position switching means (17) provided in the cylinder (2) is operated. The cam path for restricting the raised position of the cylinder needle (5) is switched, and then the cylinder needle (5) whose lift position change is enabled by the cam path after the switching is moved to the yarn feeding position by the striper (15). The knitting method using the circular knitting machine according to claim 1, wherein the knitting machine is rotated by rotating the cylinder (2) until it reaches, and then the yarn feed switching operation of the striper (15) is executed . The cam path switching by the cam position switching means (17) is performed between the upper and lower positions of the knit position for raising the raised position of the cylinder needle (5) and the tack position for lowering the raised position of the cylinder needle (5). A knitting method using the circular knitting machine according to claim 2 . A cylinder (2) in which a cylinder needle (5) is provided so as to freely move up and down surrounding the entire outer periphery, and the cylinder (2) can be rotationally driven and when the cylinder (2) stops rotating, the cylinder needle (5) Cylinder rotating means (4) capable of generating stop accuracy in accordance with the needle position, a striper (15) placed outside the cylinder (2) irrespective of the rotation of the cylinder (2), and the cylinder rotating means ( 4) and an operation control means (27) that controls the rotation and stop of the cylinder (2) by controlling the rotation of the cylinder (2), and the striper (15) can execute the yarn feeding switching operation at an independent timing. An actuator (26) is provided, and the operation control means (27) is connected to the operating state of the cylinder (2) by the cylinder rotating means (4) and the actuator (26) of the striper (15). Circular knitting machine, characterized in that the yarn feed switching operation is made possible control at a predetermined timing that. The striper (15) is gripped by a thread gripping part (22), a yarn carrier (21) that switches between a yarn feeding state and a non-feeding state for the thread gripping part (22), and a thread gripping part (22). A cutter unit (20) for cutting the yarn, and a forward feed mechanism (25) for operating the yarn gripping unit (22), the yarn carrier (21), and the cutter unit (20) one by one in accordance with the operation sequence of yarn feeding switching. The circular knitting machine according to claim 4, wherein the actuator (26) is capable of driving the progressive mechanism (25) per operation based on an electric control signal. . The cutter part (20) and the yarn carrier (21) including the yarn gripping part (22) are operable by swinging cam levers (33, 32) provided separately from each other, and the progressive feed mechanism (25 ) Of the cam lever (32) of the cam carrier (21) for the yarn carrier (21), and the cam lever (33) of the cutter portion (20) for rotation of the carrier cam (30) provided rotatably. While holding the cutter cam (31) rotatably provided corresponding to the motion input unit (85), the carrier cam (30) and the cutter cam (31) are rotatably held at a phase angle based on the order of operation. Intermittent rotation means (35) for assigning one rotation for each predetermined rotation angle to the actuator (26), the actuator (26) receives the electrical control signal each time this forward feed mechanism (2 Circular knitting machine according to claim 5, characterized in that to impart the necessary drive to an operation to the intermittent rotation means (35) in). The cylinder (2) is provided with cam position switching means (17) for switching the ascending position of the cylinder needle (5). The operation control means (27) is connected to the cylinder rotation means (4) with respect to the cylinder ( 2) The rotation of the cylinder needle (5) is switched to the cam position switching means (17) while the rotation of the cylinder needle (5) is stopped. Until the cylinder rotation means (4) reaches the yarn feeding position by the striper (15), the cylinder (2) is positioned and rotated, and at the next timing, the yarn feeding switching operation is performed on the striper (15). A time-series program that causes the cylinder rotation means (4) to rotate the cylinder (2) based on the next specified rotation condition at the next timing. Circular knitting machine according to claim 4, characterized in that it has. A dial (3) is provided on the cylinder (2) so as to be rotatable integrally with the cylinder (2), and a dial needle (9) which performs a knitting operation with the cylinder needle (5) by a lateral movement of the dial (3). The circular knitting machine according to claim 4, wherein the circular knitting machine is provided.

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