JP5042844B2 - Yarn distributor of flat knitting machine - Google Patents

Abstract

The yarn distributor, comprising a shoe (2) able to slide in a striping bar track (6), a feeder (3) with a downward-pointing tip (3a) that guides a yarn towards the needles of a knitting machine, has the feeder connected to the shoe by a moving link so its tip can be positioned just above the knitting heads in a first knitting configuration and moved away from the knitting zone in a second, non-knitting configuration. The movement between the two configurations of the yarn feeder is controlled by a drive with links (7), a motor and an actuator (13), causing the feeder to turn about a pivot (16) on the shoe. In variants of the design the pivot can move in a vertical or curved slot (15) in the shoe.

Description

  The present invention relates to a yarn distributor of a flat knitting machine, the knitting machine itself and a knitting method.

EP 0246364 consists (Patent Document 1) conventional flat knitting machine as disclosed in the before and after needle bed are arranged needles on before and after the needle bed cams thereon The carriage moves back and forth to actuate a needle and thereby form a stitch row. The cam carriage before and after each needle bed is fixed by a yoke that crosses the needle bed and ensures synchronization of movement. This yoke is essential to ensure quality because the two cam carriages act on the needles that operate the same stitch on the same knitted fabric. These knitting machine includes a number of striping bars installed and below the cam carriage yoke above the parallel needle bed needle bed. These striping bars support a yarn guide or yarn distributor, and the yarn guide or yarn distributor can slide over the entire length of the knitting machine and can guide the yarn to the needle of the knitting machine. It has. Each yarn distributor corresponds to one or many specific yarn bobbins and can guide one or many yarns towards the yarn guide. The selection / driving device of the yarn distributor comprises an electromagnetic base device which is provided in a yoke connecting two cam carriages and which can operate a driving finger located above the striping bar. So that the inside of the striping bar is slid completely in synchronism with the movement of the cam carriage and distributed to the predetermined needles for the knitting operation, so that these needles form a stitch. To manipulate those yarns. During each movement, the carriage can select one or many different thread distributors.

These conventional knitting machines include a mechanism for releasing the yarn feeder from the area to be knitted when it is no longer in use. For this purpose, a device such as that disclosed in EP 1 375 720, after its use, can be used to squeeze the yarn feeder for a free path for the other yarn feeders. Lifted away or rotated it away. This small movement of the thread feeder is carried out with the aid of an actuator arranged in the yoke between the carriages, directly above the thread distributor, which actuates the thread distributor in order to operate the thread feeder moving mechanism. Control the actuating fingers that are in direct contact. Without such a solution, when the yarn distributors cross each other , the ends of the yarn feeders , all in the same narrow knitting area on the top of the needle, may touch each other and be damaged.

Another knitting machine is disclosed in European Patent No. 0526406 (Patent Document 3). This knitting machine consists of two needle beds , an associated cam carriage, which has its own drive means in the form of a belt independently. These drive means are connected in order to synchronize the movement of the two cam carriages. Therefore, this solution eliminates the bulkiness that exists above the needle bed due to the yoke being used, so that the yarn can be fed from above into the yarn distributor, which is known as “direct threading”. It has been. In addition, each yarn distributor has its own small electric motor so that it can be moved over the striping bar. This solution can thus increase the number of bars and the number of tracks and thus the number of yarn distributors. The movement of these various independent elements is controlled and synchronized by a programmable logic microprocessor unit in order to make the two cam carriages and the yarn distributor accurate. This solution no longer has the disadvantages of prior liberation.

European Patent No. 0246364 European Patent No. 1375720 European Patent No. 0526406

In a knitting machine as disclosed in Patent Document 1 (European Patent No. 0246364), the yarn is removed from the top of the knitting machine by the presence of a yoke that is moved above the needle bed in parallel with the needle bed . These yarns cannot be transferred towards the needle and are distributed substantially horizontally from the side of the knitting machine to the yarn distributor. This solution, in conclusion, has a number of drawbacks:
-The transfer of the yarn from the bobbin to the yarn distributor is complicated, and each yarn causes breakage that causes premature yarn wear, stitch deformation and even knitting machine stoppage. Exposed to high tension, friction and torsion. Very difficult to knit delicate yarn ;
-The horizontal distribution of yarns towards this yarn distributor causes asymmetry in the function of the knitting machine;
The above constraints limit the speed of movement of the cam carriage and thus the operation of the knitting machine;
-The maximum number of possible thread distributors is limited because they are located in a narrow volume between the needle bed and the carriage yoke. On the other hand, the complexity of supplying yarns to these yarn distributors also limits these numbers. In order to achieve different knitting possibilities, it is then necessary to have a large number of yarns and possible yarn distributors;
-The selection and drive of the yarn distributor causes a rapid permanent movement and vibration, thereby increasing their wear and decreasing their service life. Furthermore, they require electronic supplies and are complicated because they are permanently moved over the entire length of the knitting machine.

  Further, in the apparatus disclosed in Patent Document 2 (European Patent No. 1375720), this actuator increases the overall size of the yoke described above. Furthermore, there are the same disadvantages associated with the knitting machine disclosed in the above-mentioned Patent Document 1 (European Patent No. 0246364) caused by the permanent movement.

  In the knitting machine disclosed in Patent Document 3 (European Patent No. 0526406), a simple actuating finger placed above the striping bar on the yoke leads to a yarn distributor that was possible with previous solutions. The direct action is no longer allowed and the thread feeder cannot be released as a result of vertical or rotational movement. Thus, all yarn feeders of this solution remain attached to their yarn distributors and are always placed at the same height very close to the needles in the same area. When they cross each other they collide and are therefore damaged or even broken.

  It is a general object of the present invention to provide a knitting machine that has the advantages of the prior art and does not have those drawbacks.

  More specifically, a first object of the present invention is to provide a knitting machine capable of avoiding a shock between yarn feeders during movement of a yarn distributor.

  A second object of the present invention is to provide a knitting machine that allows an effective distribution of yarns.

  A third object of the present invention is to provide a knitting machine that allows the use of a large number of yarn distributors.

  A fourth object of the present invention is to provide a simple and inexpensive knitting machine.

The present invention allows a longitudinal movement of a yarn feeder and a yarn distributor including a pad slidable in a track of a striping bar, a tip which can be directed downward and directed to a needle of a knitting machine, in the track . In a flat knitting machine including at least one yarn distributor composed of a coupler connected to the driving means for performing the first function, the side of the needle bed so that the driving means does not hinder yarn distribution from above the needle bed. and is located towards the drive means performs a second function of moving the yarn feeder with respect to the pad, the tip of the thread feeder and released from the knitting area in the needle bed side, the knitting machine is driven means And a weft knitting machine characterized in that it includes connecting means for remotely connecting the yarn distributor.

In one embodiment of the flat knitting machine, the yarn feeder is mounted so as to be able to rotate around the axis of the pad, the driving means is composed of a motor and an actuator, and the connecting means is a cord and yarn for connecting the motor to the pad. Belt, or cable, and cord, thread, belt, or cable that connects the actuator to the thread feeder at a point away from the axis, the actuator rotating the thread feeder relative to the pad about the axis It is possible to grip the cord.

According to another embodiment, the yarn feeder is mounted on the pad so as to be vertically movable , and the driving means includes an actuator having a second function connected to the yarn feeder by a rod. Can slide on the rod and the actuator can change the vertical position of the rod, thereby changing the vertical position of the thread feeder.

According to another embodiment, the thread feeder is mounted for vertical movement on the pad, and the thread distributor includes an intermediate element that is movable relative to the pad and coupled to the thread feeder, the vertical position of the thread feeder being relative to the pad. A cord, thread, belt or cable that allows movement and the coupling means is coupled to the pad and / or the intermediate element.

  The flat knitting machine may include two cords, yarns, belts or cables connected to the pad and the intermediate element. The drive means may include two separate motors that drive two cords, yarns, belts or cables, respectively.

  As a variant, the drive means of the knitting machine may comprise an actuator arranged to be able to grip a cord, yarn, belt or cable.

  The driving means may include a motor for driving the cord, thread, belt or cable and a clutch system for driving or non-driving the second cord, thread, belt or cable.

  The pad of the yarn distributor may be mounted on the first guide track, the intermediate element may be mounted on the second parallel guide track, and the connecting means is connected to the pad and the intermediate element on one side. On the other hand, it may consist of two cords, threads, belts or cables connected to the driving means.

  According to a variant, the drive means may include an actuating finger on the cam carriage and a driver arranged on a striping bar near the cam carriage and driven by the actuating finger, and the connecting means connects the driver other than the driver. It may consist of a cord, thread, belt or cable and a number of pulleys for connection to a thread distributor located on the striping bar.

The present invention further relates to a knitting method for a knitting machine, wherein the knitting method is a yarn supply in a knitting machine comprising a pad and a yarn feeder movably connected to the pad and capable of taking a first knitting form and a second non-knitting form. Freeing the chip of the vessel from the knitting area,
-Gripping cord, thread, belt or cable type coupling means connected to the thread feeder or an intermediate element between the thread feeder and the pad during movement of the thread distributor:
It is the knitting method characterized by this.

As a variant, in the knitting method of a knitting machine, the knitting method of the knitting machine comprises a pad and a yarn feeder that is movably connected to the pad and can take a first knitting form and a second non-knitting form. Free the chip from the knitting area,
-Stopping the longitudinal movement of the yarn distributor and slightly moving the pad or the intermediate element between the pad and the yarn feeder in the opposite direction:
Is a knitting method of a knitting machine including

  According to the present invention, the needles of the yarn feeder in the rest position are released to avoid their collision and / or climb with other yarn feeders in friction, impact and other knitting operations Can prevent collisions.

Since the volume located above the needle bed is the smallest size, the present invention has an advantage that the knitting yarn can be distributed from above. Furthermore, an additional effect of improving the yarn distribution by controlling the tension is obtained.

  According to the invention, a very large number of yarn distributors can be activated.

  The present invention is simple and inexpensive to implement.

  These objects, features and advantages of the present invention are explained in detail in the following description of specific examples, which are given in a non-limiting manner with reference to the accompanying drawings.

  In various embodiments, the same reference signs are used for the same or equivalent means.

FIG. 1 shows a first embodiment of the present invention. In FIG. 1, the yarn distributor 1 is composed of a pad 2 and a yarn feeder 3, and the yarn feeder 3 is connected by a connecting tool movable around a rotation axis 4. It is connected to the pad 2. The yarn distributor 1 has a cord 7 attached at points 9 on both sides of a pad 2 by a motor 5 provided on a side of a track 6 of a striping bar located above a needle bed 50 of a knitting machine. Moved through. Code 7 performs reciprocating movement over the entire length of the needle bed 50 is driven by a shaft set in motion around the pulley 8 by the motor 5. A second cord 10 is attached to the thread feeder 3 at a point 11 which is offset with respect to the axis 4 connecting the thread feeder 3 and the pad 2 and similarly needles around two longitudinal pulleys 12. The reciprocation is performed over the entire length of the floor 50. Actuator 13 can take two stable positions: a first position shown in FIG. 1 a that does not interact with cord 10 and a second position shown in FIG. 1 b that grips cord 10. The two cords 7, 10 are located in the track 6 and their size is very small and does not affect the yarn distribution at all.

In the first configuration shown in FIG. 1a (ie the knitting configuration) , the yarn feeder 3 is vertical and can distribute the yarn to the needles of the needle bed to perform the knitting operation. For this purpose, the yarn distributor 1 is driven to follow the movement of the cam carriage by a motor 5 via a cord 7 connected to the pad 2, and distributes the needle is activated thread. This movement of the yarn distributor 1 results in the simultaneous movement of the feeder 3 and the cord 10 connected thereto. The yarn feeder 3 maintains this vertical position by a device (not shown) so as not to complicate the illustration.

When the yarn distributor 1 is not used anymore knitting operation, it is a stopped or parked or non woven form shown in Figure 1b is stopped (second embodiment), the yarn supplier 3 with this non-woven form axis 4 Takes a new position relative to the pad 2 as a result of rotating in the direction of arrow A. In order to change to this second form, the motor 5 grips the cord 10 while driving the cord 7 and thereby the pad 2 in the direction of arrow B. The point 11 of the thread feeder 3 is therefore kept fixed by the cord 10, while the point 4 of the same thread feeder 3 is moved to the right in the longitudinal direction in the direction of the arrow B. As a result, a force sufficient to release the thread feeder from the lock in its vertical position is applied to rotate the thread feeder around the axis 4 in the direction of arrow A. A slight rotation of the yarn feeder 3 causes the tip 3a to lift up sufficiently from the knitting area located above the needle bed so that it no longer interferes with movement or intersects with other yarn feeders. The motor 5 is therefore programmed to make a short movement following gripping by the actuator 13. The second configuration is maintained by maintaining the grip and continuing to stop the motor 5. As a variant, another system is provided for maintaining the yarn feeder stationary in this second position so that the grip can be released.

When the yarn distributor is moved opposite to the left of the arrow B in the longitudinal direction takes a symmetrical form (not shown) before being a stationary form is stopped.

  For the change from the second configuration of FIG. 1b to the first configuration of FIG. 1a for a new knitting operation, in the first solution described above, the yarn distributor comprises a spring (not shown), The actuator 13 releases the grip and the spring returns the thread feeder to the vertical position. Once in this position, the motor 5 can again move the yarn distributor in the knitting operation state.

For example, the transformation like the yarn feeder is maintained in the second position, return to the first position of the yarn feeder in a state where code 10 is gripped by the actuator 13 to move the pad 2 to the left Is done.

In this first embodiment of the present invention, the motor 5 was used to move the yarn distributor, but other equivalent mechanisms can be used. For example, the cord 7 may be connected via a pulley device to a driver device arranged on another striping bar located in the vicinity of the cam carriage and driven by an actuating finger of the carriage itself, thereby being parallel and Ru is generated remotely movement of the yarn distributor located striping bars spaced further distance. Therefore, the motor 5 is no longer necessary, be replaced more complex but using less expensive intermediate mechanism than smaller sizes, by a motor of a carriage which can move the yarn distributor remotely.

Finally, the concept of the invention, on the one hand, performs all movements of the thread distributor by means of motor-type drive means, which inherently have a relatively large portion of the drive means that prevents the thread from being distributed above the needle bed. In the area of the knitting machine that is not, for example, in the illustrated embodiment, positioned laterally. This drive means is therefore spaced from the knitting area and a simple and compact intermediate connection means of yarn, cord, cable or belt or the like is used to connect it to the yarn distributor. In the embodiment shown, the connecting means is a thread arranged on the striping bar track. On the other hand, according to the concept of the present invention, the drive means performs two longitudinal movement functions, i.e., on the one hand, moves the yarn distributor in the longitudinal direction for knitting operations, and on the other hand, the yarn distributor When no longer involved in knitting, the yarn feeder is moved relative to the pad on the yarn distributor to release the tip 3a of the yarn feeder.

  According to the embodiment of the invention illustrated in FIGS. 1 a and 1 b, the drive means comprises a motor 5 and an actuator 13 and two cords 7, 10 arranged in the longitudinal direction of the knitting machine at the end of the striping bar. It consists of connecting means. As illustrated in the examples below, the drive means may consist of one or a number of devices, such as two motors, and the coupling means may also perform the two functions described above in combination or separately. It may consist of one or a number of devices, threads, cables, belts or rods.

2a to 2c show a second embodiment of the present invention. FIG. 2a shows the yarn distributor in the knitting form, in which the yarn feeder 3 is in the lowest vertical position so that the yarn can be distributed to the needles of the knitting machine. The thread distributor 1 is relative to a pad 2 movable in a track 6, a thread feeder 3 connected to the pad 2 via an intermediate element, and to the pad 2 (indicated by the arrow B or in the opposite direction). It consists of an intermediate element (cam) 14 arranged in the frame 17 of the pad 2 so as to be slidable in the longitudinal direction. The intermediate element 14 includes a slot 15 in which a circular arc shape, the yarn supplier 3 is movably connected by a pin 16 which is located within the slot 15 relative to the intermediate element (cam) 14. Furthermore, the thread feeder 3 is located in the channel 25 of the pad 2, which only allows its vertical movement. The yarn distributor 1 is moved by a drive 7 and a cable 7 fastened to the intermediate element 14. The drive unit for the yarn distributor is not shown and is the same as that used in the first embodiment.

In the knitting form shown in FIG. 2 a, the yarn distributor 1 is moved longitudinally to the right in the direction of the arrow B under the effect of the driving means pulling the cable 7 fastened to the intermediate element 14 at the connection point 9. The intermediate element 14 is located at the right end in the frame 17 and contacts the wall of the pad 2, thus driving the pad 2. Pin 16 of the thread feeder is positioned on the left edge of the slot 15 is in the lowermost position of that.

When the yarn distributor 1 is not used anymore in knitting, it is placed in a second embodiment shown in Figures 2b and 2c, the yarn supplier 3 in this embodiment is moved away from the needle bed 50 above the knitting area Take the raised position. To change to this second configuration , the yarn distributor is first stopped and then the drive means is moved slightly in the direction opposite to the direction of arrow B of the intermediate element 14 until the intermediate element is in the center position. The intermediate element is slid within the pad 2 along a path equal to half the width of 17. At the same time, the pin 16 of the thread feeder 3 is moved in the slot 15 to the highest central position of the arc. For example, since there is play between the pad 2 and the intermediate element, there is a friction between the pad 2 and the track 6 of the yarn distributor that is higher than the friction between the pad 2 and the intermediate element. It becomes possible. The upward movement of the pin 16 thus lifts the yarn feeder 3 assembly in its channel 25 and moves its tip 3a away from the knitting area.

The return to the operating position of the first form is effected by driving the element 14 to the right or left. The element 14 is moved in the pad 2, and at the same time, the movement of the pin 16 in the slot 15 until the element reaches an end position in contact with the end of the pad 2 in the frame 17 of the pad 2. The feeder 3 is driven downward. During this time, the pad 2 remains stationary under the effect of the frictional force described above. The knitting form is then reached. Subsequently, the element 14 still driven in the same direction drives the pad 2 at the same time. Element 14, pad 2 and yarn feeder 3 then remain stationary with respect to each other, and the tip of yarn feeder 3 is in the knitting position.

In order to achieve the effect described above, the movement distance in the longitudinal direction of the element 14 inside the pad 2 depends on the dimension of the slot 15 employed and the width of the frame 17 of the pad 2. Make it equal to the distance traveled. As a variant, larger dimensions may be employed in the slot 15 so that the elements can fit different sizes of yarn distributors, where appropriate.

  In this second embodiment, the connecting means consists of a single cable 7.

3a to 3c show a third embodiment of the present invention, which is a variation of the embodiment described above. The yarn distributor 1 likewise comprises a pad 2, an intermediate element 14 and a yarn feeder 3. The thread feeder includes a first pin 16 a that passes through the first slot 18 of the pad 2 and the arc-shaped second slot 15 of the intermediate element 14. It includes a second pin 16 b that passes through the slot 18 of the pad 2. The two pins 16 a, 16 b allow only vertical movement of the thread feeder 3 with respect to the pad 2. The yarn distributor is moved by drive means (not shown) and in this variant at the connection point 9 by the cord 7 fastened to the pad 2 rather than the intermediate element 14. The intermediate element 14 is mounted in the striping bar track 6 so as to be movable in the longitudinal direction and is moved relative to the pad 2 between two gripping positions defined by the longitudinal stop piece 19 of the pad 2. The

In the knitting form shown in FIG. 3a, the intermediate element 14 is positioned to the left with respect to the pad 2 at its end position, the pad 2 is moved to the right under the effect of the driving means, and the driving means points the pad 2 to the arrow. Pull to the right of B. The pin 16 a of the thread feeder 3 then takes the lowest position of the two slots 15, 18 and similarly the pin 16 b takes the lowest position in the slot 18.

  When the yarn distributor is no longer in use, the yarn distributor is stopped and then the drive means 5 moves the pad 2 in the direction opposite to arrow B. This movement causes the pad 2 to slide relative to the intermediate element 14, and this sliding is stopped when the intermediate element assumes its center position. At the same time, the pin 16a is moved to the highest position of the slots 15, 18 as shown in FIGS. 3b, 3c. In this configuration, therefore, the yarn feeder 3 assumes a raised position, thereby moving the chip away from the knitting area. This mechanism is made possible by the fact that the selected friction force between the intermediate element 14 and the track 6 is higher than the friction force between the pad 2 and the intermediate element 14.

  The return to the knitted form is likewise effected by the longitudinal drive of the pad 2, which in turn drives the thread feeder first and then the thread distributor assembly of the needle selected for knitting downwards. .

4a to 4c show a fourth embodiment of the present invention, which is a variation of the two previously described embodiments. This embodiment differs in that the pad 2 and the intermediate element 14 are both connected to the driving means by two belts 7,10, respectively. The belt 7 is driven by a motor 5 and a drive shaft 8. The connection between the drive means and the yarn distributor consists of four connection points 9.

4a and 4b show a knitting form of the yarn distributor, in which the drive shaft 8 is engaged with a pulley 12 of the same diameter, held in this stable state by the force of the spring 20 and the spring 20 being a belt. 10 is driven in synchronism with the belt 7. The pad 2 and the intermediate element 14 are thereby driven at the same speed and in the same direction and are kept stationary with respect to each other, and the yarn feeder 3 thus maintains its lowest operating position.

In order for the thread feeder 3 to produce the stop configuration shown in FIG. 4c, the actuator 13 pushes the pulley 12 downward against the force of the spring 20 and disengages it from the drive shaft 8 like a clutch. In this position, the belt 10 is stopped. The motor 5 continues to drive the pad 2 slightly by the belt 7 so that the intermediate element 14 slides in the frame 17 of the pad 2 to an end position where it hits the wall of the pad and at the same time moves the pin 16 in the slot 15; Then, an upward vertical movement of the yarn feeder 3 is caused in the channel 25 of the pad 2.

The repositioning in the knitted form of the distributor is thus effected by a slight drive of the pad 2 over a stroke equal to half the width of the frame 17 of the pad 2, so that the intermediate element 14 can be centered and At the same time, the yarn feeder 3 is lowered again. The actuator 13 then releases the pulley 12, which can re-engage the drive shaft 8 and return it to the configuration shown in FIG. 4a.

5a to 5d show a fifth embodiment of the present invention. In this embodiment, the yarn feeder 1 comprises a pad 2, an intermediate element 14 and a yarn feeder 3 connected to a driving means 5 (not shown) by a cable 7. Intermediate element 14 end 20 in contact with the track 6, through the orifice 22 which regulates the rotation shaft of the intermediate element 14 eccentric to the shaft 21 and the shaft 21 extend through the pad 2 and the yarn supplier 3 It consists of a circular portion 23 located in an elliptical slot 24. The thread feeder is held on the other hand in the channel 25 of the pad 2, so that only its vertical movement is allowed.

  Figures 5a and 5b show the yarn distributor 1 in knitted form. The pad 2 is driven to the right, and the intermediate element 14 assumes a position rotated 45 degrees around its axis of rotation 21 to the left, its circular part hits the left end of the elliptical slot 24, and The yarn feeder takes its lowest position.

  Figures 5c and 5d show a second configuration of the thread feeder in the stop position, the thread feeder 3 being lifted. A change to this configuration is made by stopping the thread feeder and then driving it a small distance in the opposite direction to drive it leftward about the pad, while simultaneously moving the intermediate element 14 about its axis 21 in its vertical direction. Rotate until position is reached. The thread feeder is lifted simultaneously. This operation principle is an eccentric rotation form.

6a to 6d show a sixth embodiment of the present invention. In this embodiment, the yarn feeder 1 comprises a pad 2 connected to a driving means (not shown) by a belt (not shown), and a yarn feeder 3 connected to the pad by a connecting means 25 allowing only relative movement in the vertical direction. Yes. The thread feeder 3 comprises a pin 16 positioned on a rod 27 connected to a longitudinally positioned two-position stable actuator 28, which allows the rod to assume two stable positions. That is, a low position where the yarn feeder shown in FIGS. 6a and 6b takes the lowest position of the knitting mode and a high position where the yarn feeder shown in FIGS. 6c and 6d is spaced from the knitting region. As a variant, a motor 28 may be used, whereby the rod can take two or more different positions.

  In this embodiment, the drive means consists of two separate devices that perform two independent movement functions. Similarly, the connecting means consists of two separate means. For the sake of accuracy, the actuator 28 is adapted to move the yarn feeder 3 in the vertical direction by means of suitable coupling means with respect to the pad 2, which coupling means at a single contact point 9. It is the rod 27 connected to. The longitudinal movement of the yarn feeder is effected by a motor connected to the pad by a cable, these means are not shown. One advantage of this drive function being completely separated is that it allows for optimum use flexibility, and the yarn feeder 3 is in the vertical direction at any moment during the longitudinal movement of the yarn distributor 1. Can be moved to.

FIGS. 7a, 7b and 8 show a seventh embodiment of the invention, in which the striping bar consists of two overlapping tracks 6a, 6b for receiving the pad 2 and the intermediate element 14, respectively, 2 and the intermediate element 14 are connected to motors 5a, 5b by belts 7, 10, respectively. As a variant, the two tracks 6a, 6b may be on one side of the same striping bar or on two different striping bars. The yarn feeder 3 includes a first rigid element 3b supporting a tip 3a (shown in FIG. 8) and an overlapping blade 3c. This blade 3c is connected on the one hand to the intermediate element 14 by a pin 16a passing through the vertical slot 30 of the first element 3b and the cam track 31 of the intermediate element 14 and on the other hand the vertical of the pad 2 It is connected to the pad 2 by two pins 16b , 16c that pass through the slot 18 and the vertical slot of the element 3b. The element 3b is thus connected to these pads 16a, 16b, 16c so as to be movable in the vertical direction with respect to the pad 2. In addition, it is connected to the intermediate element 14 by a pin 26 that passes through the second cam track 32 of the element 14.

  FIG. 7a shows a knitted form in which the intermediate element 14 and the pad 2 are at the same level of longitudinal position on the respective tracks 6a, 6b. This corresponds to the lowest position of the pin 26 of the element 3b in the cam track 32 and is therefore the lowest position of the tip 3a of the yarn feeder 3 which is optimal for knitting. On the other hand, the blade 3 c takes a lifted position, and its pin 16 a is located in the upper portion of the cam track 31. The respective positions of element 3b and blade 3c correspond to FIG. 8 and are described below.

  FIG. 7b shows an intermediate configuration between the knitting configuration of FIG. 7a and a stop configuration not shown. This change to the intermediate form is made by the eccentric of the intermediate element 14 by the two respective motors 5a, 5b on the respective tracks 6a, 6b with respect to the pad 2. In this new configuration, the pin 26 of the element 3b takes the higher position of the cam track 32 and moves the tip 3a of the yarn feeder to move it away from the knitting area. At the same time, the blade 3c takes a lower position with respect to the element 3b. Each movement of the blade 3c relative to the rest of the yarn feeder makes it possible to lift the yarn feeder tip 3a at the same time, which has the effect of braking the yarn 40 used for knitting, thus changing the yarn tension, In this way, the distribution can be controlled more effectively.

FIG. 8 shows the lower part of the yarn feeder 3 in knitted form. The first element 3b of the thread feeder consists of a guide 35 for the thread 40, which includes two projections 36a, 36b. The blade 3c penetrates the guide 35 and forms a loop 37 facing the projection 36b, thus forming an obstacle type circuit for the knitting yarn 40. As the blade 3c moves in a direction perpendicular to the element 3b, the loop 37 approaches one of the protrusions 36, thereby increasing the friction of the thread 40 and increasing its tension. For example, in the configuration shown in FIG. 7b, the loop 37 is close to the protrusion 36a. It is obtained by moving the intermediate element 14 more to the left, with the pin 16a in its lowest position and the pin 26 in its highest position, thereby lifting the tip 3a of the yarn feeder. In a static form (not shown), the loop 37 hits the protrusion 36a, thereby gripping the thread 40 so as to completely prevent the thread from running.

Therefore, the above-described yarn feeder performs the function of braking the yarn by means of a blade that can move vertically relative to the other parts of the yarn feeder, and this vertical movement is directly combined with the movement of stopping the yarn feeder. Yes. Each movement of the two elements 3b, 3c of the yarn feeder is defined by the shape of the cam tracks 31, 32. As shown by way of example in FIGS. 7a and 7b, the slope of the cam track 32 begins in front of the track 31 so that the blade begins to brake the thread, causing it to slow down. The chip is still knitting. All other variations are possible and include the following:
-Braking the yarn during knitting for specific applications where the tension of the yarn is required during knitting;
-Brake and grip the yarn only when the yarn feeder is in the rest or non-knitting position.

Since the movement of the intermediate element 14 and the pad 2 is performed by drive means consisting of two independent motors 5a, 5b, each positioning is tensioned on the yarn by dynamically modifying the yarn distribution operation during the knitting operation. A function of applying and / or a function of stopping can be provided.

The function of braking the yarn or changing its tension is particularly effective in the field of orthopedics using rubber knitted products . In this type of use, it is necessary to keep the rubber under tension, especially when the rubber distributor is stationary . It is also appropriate to knit with elastic yarn.

  In the various embodiments of Examples 1-7 described above, the means are symmetrical so that the same result can be obtained with left-to-right movement of the yarn distributor in either direction or vice versa. Yes. Such a result can be considered by a combination of asymmetric elements, but also by different relative motions.

  In the various embodiments of Examples 1 to 6, the yarn feeder 3 has been simplified to a single element form for clarity, but may be made from multiple elements. . For example, it may be a first rigid part that is fastened to the pad and acts as a support for the more flexible and lighter movable part, which is the flexible movable part of the yarn feeder. It consists of chips. The release movement of the thread feeder may therefore involve the movement of a light element at the top of the thread feeder, this movement being transmitted by other elements of the thread feeder that are positioned towards the pad.

  The invention can also be applied to a yarn distributor consisting of a large number of yarn feeders or a single yarn feeder, from a number of chips which can be moved simultaneously or independently of each other so that the feeder is released from the knitting area. It may be.

In the above-described transformation like, the top of the thread supplying device is released by rotation or vertical upward movement from the needle bed above the knitting region has been described. However, the principles of the present invention can also be applied to other movements of the thread feeder tip relative to the needle bed of the thread feeder thereby releasing it from the knitting area, for example cams adapted to specific conditions of different shapes It may be by track. Furthermore, the various elements of the various embodiments described above, such as the drive means, the coupling means, and the mechanical coupling between the pad and the thread feeder, may be combined to make other embodiments.

Finally, the solution of the present invention reliably achieves the desired purpose and includes various advantages:
-The present invention releases the yarn feeder tips in a stationary position to avoid collisions with other yarn feeders in their friction, impact and other knitting operations and / or collision with a rising needle prevent;
-Since the volume located above the needle bed is the smallest, the present invention has the advantage that the yarn can be distributed from above. The last embodiment also has the additional effect of improving yarn distribution by controlling its tension;
The present invention can operate a large number of yarn distributors;
-The present invention is simple and inexpensive.

1 shows a schematic view of a yarn distributor in a knitted form according to a first embodiment of the invention. 1 shows a schematic view of a yarn distributor in a stop configuration according to a first embodiment of the invention. Figure 3 shows a schematic view of a yarn distributor in knitted form according to a second embodiment of the invention. Fig. 4 shows a schematic view of a yarn distributor in a stop configuration according to a second embodiment of the present invention. Fig. 4 shows a schematic II-II cross-sectional view of a yarn distributor in a stopped configuration according to a second embodiment of the present invention. Fig. 4 shows a schematic view of a yarn distributor in knitting form according to a third embodiment of the invention. Fig. 4 shows a schematic view of a yarn distributor in a stop configuration according to a third embodiment of the present invention. Fig. 6 shows a schematic view of a yarn distributor in knitting form according to a fourth embodiment of the invention. Fig. 4 shows a schematic IV-IV cross-sectional view of a yarn distributor in a knitted form according to a fourth embodiment of the present invention. Fig. 6 shows a schematic view of a yarn distributor in a stop configuration according to a fourth embodiment of the present invention. Fig. 6 shows a schematic view of a yarn distributor in knitting form according to a fifth embodiment of the present invention. FIG. 6 shows a schematic VV cross-sectional view of a yarn distributor in a knitted form according to a fifth embodiment of the present invention. Fig. 6 shows a schematic view of a yarn distributor in a stop configuration according to a fifth embodiment of the present invention. FIG. 7 shows a schematic VV cross-sectional view of a yarn distributor in a stop configuration according to a fifth embodiment of the present invention. Fig. 9 shows a schematic view of a yarn distributor in a knitted form according to a sixth embodiment of the present invention. FIG. 6 shows a schematic VI-VI cross-sectional view of a yarn distributor in a knitted form according to a sixth embodiment of the present invention. Fig. 9 shows a schematic view of a yarn distributor in a stop configuration according to a sixth embodiment of the present invention. FIG. 6 shows a schematic VI-VI cross-sectional view of a yarn distributor in a stop configuration according to a sixth embodiment of the present invention. Fig. 9 shows a schematic view of a yarn distributor in a knitted form according to a seventh embodiment of the present invention. Fig. 9 shows a schematic view of a yarn distributor in a stop configuration according to a seventh embodiment of the present invention. It is the schematic of the lower part of the yarn feeder of the yarn distributor in the knitting form according to the seventh embodiment of the present invention.

DESCRIPTION OF SYMBOLS 1 Thread distributor 2 Pad 3 Thread feeder 3a Tip 3c Blade 4 Axis 6 Striping bar track 7 Cord 9 Connecting tool having connecting means for connecting thread supplying device to driving means 10 Cord 13 Actuator 14 Intermediate element 16a, 16b Pin 25 Pad channel 40 thread 50 needle bed

Claims (9)

  A thread feeder (3) and a thread distributor (1) including a pad (2) slidable in a track (6) of a striping bar, a tip which can be directed downwardly toward a needle of a knitting machine From a coupling tool (9) with coupling means (7, 10) for remotely coupling the yarn feeder (3) to drive means for performing a first function of moving in the longitudinal direction within the track (6) In the flat knitting machine including at least one yarn distributor (1), the yarn feeder (3) can dispose the tip of the yarn feeder directly above the needle bed in the knitted form, and supply the yarn in the non-knitted form. Having a connector movable with respect to the pad (2) capable of moving the tip of the vessel away from the knitting area, so that the drive means does not interfere with the yarn distribution from above the needle bed (50) Located on the side of the floor (50), the drive means connects the thread feeder (3) to the pad ( Flat knitting machine, characterized in that to release from the knitting area performed a second function of moving the yarn feeder of the chip (3a) in the needle bed (50) upwardly relative). The thread feeder (3) is mounted on the pad (2) so as to be rotatable about the axis (4), the driving means is composed of a motor and an actuator (13), and the connecting means is the motor on the pad (2). A cord (10), a thread, a belt, or a cable to be coupled, and a cord (10), a thread, a belt, which couples the actuator (13) to the thread feeder (3) at a point (11) away from the axis (4) Or comprising a cable, the actuator being capable of gripping the cord (10) for rotating the thread feeder (3) relative to the pad (2) about the axis (4). The flat knitting machine according to 1. The yarn feeder (3) is placed on the pad (2) so as to be vertically movable, and the driving means includes an actuator (28) having a second function connected to the yarn feeder (3) by a rod (27). The thread feeder (3) rests on the rod (27) and is slidable on the rod (27), and the actuator (28) can change the vertical position of the rod (27), thereby The flat knitting machine according to claim 1, wherein the vertical position of the feeder (3) is changed. The yarn feeder (3) is mounted on the pad (2) so as to be vertically movable, and the yarn distributor (1) is movable with respect to the pad (2) and is connected to the yarn feeder (3) and connected to the pad. A cord (7; 10), a thread, a belt or a cable comprising an intermediate element allowing vertical movement relative to (2), the connecting means being connected to the pad (2) and / or the intermediate element (14) The flat knitting machine according to claim 1, wherein the flat knitting machine is provided. 5. The machine as claimed in claim 2, wherein the flat knitting machine comprises two cords (7, 10), yarns, belts or cables connected to the pad (2) and the intermediate element (14). The flat knitting machine according to item. The flat knitting machine according to claim 5, characterized in that the driving means comprises an actuator (13) arranged to be able to grip the cord (10), yarn, belt or cable. The drive means includes a cord (7), a motor for driving the yarn, belt or cable and a cord (10), a clutch system (12, 13) for driving or non-driving the yarn, belt or cable. The flat knitting machine according to claim 5. The flat knitting machine according to claim 5, characterized in that the driving means comprise two separate motors for driving two cords (7, 10), yarn, belt or cable, respectively. The pad (2) is placed on the first guide track, the intermediate element (14) is placed on the second parallel guide track (6b), and the connecting means on one side is the pad (2) and the intermediate element. 5. Transverse element according to claim 4, characterized in that it consists of two cords (7, 10), a thread, a belt or a cable connected to the drive means (5a, 5b) on the other hand. Knitting machine.

Images