JPH0351815B2 - - Google Patents

Description

Detailed Description of the Invention This invention operates a plurality of yarn paths individually according to a predetermined program to supply new knitting yarn to the knitting needles at any time, and also to cut the yarn being knitted and remove it from the knitting needles. This invention relates to a knitting yarn exchange device for a circular knitting machine that stops the supply of yarn to a circular knitting machine.

A conventional knitting yarn changing device of this kind has a plurality of yarn paths each corresponding to each knitting yarn feeder, and the selection of a selector for controlling the cutting of a desired yarn path is controlled by the operation of an electromagnet. As a result, the operation at the time of starting is unstable, and therefore measures such as using a strong magnet or temporarily applying a high voltage, ie, a so-called surge voltage, have been taken.

The present invention was made with the aim of obtaining a device that does not have these drawbacks of conventional devices, and will be explained below with reference to the drawings.

As described above, the knitting yarn exchange device is provided with a plurality of knitting yarn feeders and a plurality of corresponding yarn paths,
The control mechanism is actuated according to a program to individually control each yarn path to perform knitting yarn exchange, and the figure shows one yarn feeder, one yarn path, and one operating mechanism. Referring to the figure, 1 is a solenoid, the tip of a plunger 2 is connected to a selector 3 by a pin 4, the selector 3 is pivotally supported by a shaft 5, and one end forms a claw portion 3'. However, the other end is always kept under tension due to the biasing force of the spring 6.

The camshaft 7 has a latch lever 8 which is reciprocated about the camshaft 7 by an angle of 90 degrees by an actuating device, such as a cam device (not shown), for each revolution of the cylinder (not shown) of the knitting machine. and a cam wheel 9, and a thread guide operating cam 10 and an operating cam 11, which rotate simultaneously with the cam wheel 9 and have similar shapes and are slightly out of phase with each other, are fitted.

There are four notches 9a, 9 on the periphery of the cam foil 9.
b, 9c, and 9d are provided at equal intervals, and the cutout portion is located at the tip of the rack pawl 14, which is rotatably supported by the fixed shaft 12 on the rack lever 8 and is always under tension due to the biasing force of the spring 13. 14', and the rear end 14'' of the lock pawl is connected to the selector 3.
It is configured to engage with the claw portion 3' of.

A thread guide 16 having a thread guide 15 at its tip has a thread guide operating lever 1 swinging around a shaft 17 at its other end.
8 via a shaft 19, and the thread guide operating lever 18 has a convex portion 18 that is pressed against the circumferential surface of the thread guide operating cam 10 by the urging force of a spring 20 and slides on the circumferential surface of the cam. ', and the thread path 16 is provided with a guide groove 22 which engages with a fixing pin 21 and restricts the forward and backward movement of the thread path 16.

The scissors 23 are composed of a fixed blade 24 and a movable blade 26 that rotates around a shaft 25, and a cutting thread end gripping device (not shown) is provided adjacent to the scissors. The end of the movable blade 26 of the scissors is connected to the shaft 1
One end of the scissors operating lever 27 supported by the shaft 28
The scissors operating lever 2
The other end of 7 branches into two, and the scissors operating cam 11
Two protrusions 27' and 27'' are provided at a distance of 1/4 of the total length of the circumferential surface of the scissors actuating cam, respectively, and slide on the circumferential surface of the cam.

29 is a knitting yarn, 30 is a yarn feeder guide, 31 is a knitting needle on the cylinder of the knitting machine, and 32 is a latch guard.

Next, we will take one yarn path as an example of the operation of this inventive device. First, yarn is fed to the knitting machine, the cylinder of the knitting machine rotates once, the first course of knitting is completed, and the knitting yarn is replaced. A case will be explained in which the second course is subsequently knitted.

Normally, as shown in FIG. 1, the rack lever 8 is fixed in the raised position by a pin (not shown), and the tip of the rack pawl 14 on the rack lever 8 is
4' is brought into engagement with the notch 9a of the cam foil 9 by the biasing force of the spring 13, and yarn feeding to the knitting machine is performed. Now assume that the cylinder of the knitting machine has rotated once and knitting of the first course has been completed.
The signal issued from the program control device (not shown) is transmitted to the actuating device (not shown) of the latch lever 8.
The pin is removed and the lock lever 8 is
The rack claw 14 begins to rotate at an angle of 90 degrees in the downward direction around the shaft 7, and rotates together with the rack lever 8.
The rear end 14'' comes into contact with the claw portion 3' of the selector 3, and as shown in FIG. As shown in FIG.
The tip 14' of the cam wheel 9 engages with the notch 9b of the cam wheel 9 and stops. On the other hand, since the yarn feeding stop signal is not transmitted to the solenoid 1, the solenoid 1 does not operate, and the rack lever 8 immediately starts to reverse and rise.
4'' is the spring 1 by the claw portion 3' of the selector 3.
3, the lock claw 14 is pushed against the fourth biasing force.
As shown in the figure, it rotates around the shaft 12, and the tip 14' of the rack claw 14 comes off the cutout 9b of the cam foil 9, and the lever lever 8 rotates 90 degrees to return to the state shown in FIG. 1.

Therefore, the cam wheel 9 is not affected by the rotation of the latch lever 8 at all, and the thread guide operating cam 1
0. Since the scissors operating cam 11 does not rotate, the yarn feeding continues and knitting of the second course is performed.

Next, a case will be described in which yarn feeding to the knitting machine is performed, the cylinder of the knitting machine rotates once, the first course of knitting is completed, and feeding of the knitting yarn is stopped.

Now, in the state shown in Fig. 1, yarn is fed to the knitting machine, the cylinder of the knitting machine rotates once, knitting of the first course is completed, and the signal issued from the program control device (not shown) is as follows. The information is transmitted to the actuating device (not shown) of the latch lever 8, and the latch lever 8
rotates at an angle of 90 degrees in the downward direction about the shaft 7, and the rear end 14'' of the rack claw 14, which rotates together with the rack lever 8, comes into contact with the claw portion 3' of the selector 3, as shown in FIG. The selector is pushed down slightly to slide over the claw portion 3' of the selector 3, and engages with the claw portion 3' of the selector 3 as shown in FIG.
4' engages with the cutout 9b of the cam wheel 9 and stops. On the other hand, the yarn feeding stop signal from the program control device is transmitted to the solenoid 1, and the plunger 2 of the solenoid 1 is pulled as shown in FIG.
Along with this, the selector 3 connected to the pin 4 also resists the biasing force of the spring 6 and swings about the shaft 5, causing the rear end 14'' of the rack pawl 14 and the claw portion 3' of the selector 3 to rotate. is disengaged.Therefore, the lock pawl 14 is
While its tip 14' remains engaged with the notch 9b of the cam wheel 9, it starts to move upward and reverse together with the latch lever 8.
Since it rotates at an angle of 90 degrees, as shown in FIG.
Both rotate by an angle of 90 degrees. Therefore, the convex portion 18' of the thread guide operating lever 18 slides while contacting the peripheral surface of the thread guide operating cam 10 due to the biasing force of the spring 20, and the fixing pin 21 slides in the guide groove 22 of the thread guide 16. While moving, the thread path 16 is moved backward, while the protrusions 27' and 27'' of the scissors operating lever 27 slide while contacting the surface of the scissors operating cam 11, closing the movable blade 26 of the scissors 23 and connecting it to the fixed blade 24. The knitting yarn is cut between the cylinders and the relationship with the knitting needles 30 on the cylinder is terminated, and at the same time, the solenoid 1 returns to a state where yarn feeding is stopped.

Then, when the cylinder of the knitting machine rotates once while the yarn feeding to the knitting machine is stopped, and the yarn feeding to the knitting machine continues to be stopped for the next course, the signal issued from the program control device is transmitted to the lattice lever 8. This is transmitted to the actuating device, and the latch lever 8 begins to rotate at an angle of 90 degrees in the downward direction about the shaft 7, and as shown in FIG. The ends 14'' engage with the claws 3' of the selector 3 and stop, but since the yarn feeding start signal is not transmitted to the solenoid 1, the solenoid does not operate and the latch lever 8 starts to reverse upward. Rack claw 1 that rotates together with rack lever 8
The rear end 14'' of the selector 3 is pushed against the biasing force of the spring 13 by the claw portion 3' of the selector 3 that engages with the rear end 14'', and the rack claw 14 rotates around the shaft 12. The tip 14' is the notch 9 of the cam foil 9.
c, the rack lever 8 rotates 90 degrees together with the rack pawl 14, and then returns to the state shown in FIG. 6.

Therefore, the cam wheel 9 is completely unaffected by the rotation of the lock lever 8, and the thread guide operating cam 10,
Since the scissors operating cam 11 does not rotate, the yarn feeding halt state continues.

On the other hand, when the cylinder of the knitting machine rotates once while yarn feeding to the knitting machine is stopped in the state shown in FIG. The lever 8 begins to rotate by 90 degrees in the downward direction about the shaft 7, and as shown in FIG. The rear ends 14'' respectively engage with the claws 3' of the selector 3 and stop. At the same time, a yarn feeding start signal from the control device is transmitted to the solenoid 1, and the plunger 2 of the solenoid 1 is pulled. The selector 3 connected to the pin 4 also swings about the shaft 5 against the biasing force of the spring 6, and the rear end 14'' of the rack claw 14 engages with the claw portion 3' of the selector 3. is removed. At the same time, the latch lever 8 starts to reverse and rise, so that the latch lever 8 remains with its tip 14' engaged with the notch 9c of the cam foil 9.
As shown in FIG.
Both rotate by an angle of 90 degrees.

Therefore, the convex portion 18' of the thread guide operating lever 18 is
The thread guide operating cam 1 resists the biasing force of the spring 20.
0 while sliding in contact with the surface of the fixing pin 2.
1 advances the yarn path 16 to the yarn feeding position while sliding in the guide groove 22 of the yarn path 16, and feeds the yarn to the knitting needles 30 on the cylinder. One side operating lever 27
The convex portions 27' and 27'' slide while contacting the surface of the operating cam 11, opening the movable blade 26 of the scissors 23, and at the same time, the solenoid 1 returns to return to the yarn feeding state.

As described in detail above, the knitting yarn changing device for a circular knitting machine of the present invention operates a plurality of yarn paths individually based on a program, and feeds and stops feeding knitting yarn. In the knitting yarn exchange device, a solenoid,
A selector that is connected to the tip of the plunger of the solenoid and swings as the plunger moves back and forth, a cam wheel that rotates simultaneously on the cam shaft, a yarn guide operating cam, a scissors operating cam, and the cam that rotates every rotation of the knitting machine cylinder. a rack lever that is reciprocally rotated at an angle of 90 degrees about a shaft by an actuating device; and a rack claw that is pivotally supported on the rack lever, the tip of which engages with the cutout of the cam foil, and the rear end of which engages with the selector. , a thread guide operating lever which has a convex portion that comes into contact with the thread guide operating cam and swings as the thread guide operating cam rotates; and a thread guide operating lever which is connected to the thread guide operating lever and is supplied by swinging of the thread guide operating lever a yarn path that moves back and forth between a yarn position and a yarn feeding stop position; a scissors operating lever that has two convex portions that come into contact with the scissors operating cam and swings as the scissors operating cam rotates; and the scissors operating lever. The scissors are connected to a lever and consist of a fixed blade and a movable blade, which open and close the movable blade in response to the swing of the scissor actuating lever and the forward and backward movement of the thread path.The cylinder of the knitting machine rotates once. When the solenoid is activated according to a signal from the program control device, the plunger is pulled and the selector swings, the selector and the lock pawl are disengaged, and the engagement between the cutout of the cam foil and the rack pawl is maintained, and the lock lever is When the solenoid is turned, the cam wheel, thread guide operating cam, and scissors operating cam are rotated to change the knitting yarn.Also, when the solenoid is not activated, the engagement between the selector and the easy pawl is maintained, and the engagement between the easy pawl and the cam foil is maintained. The cam foil remains in a stopped state regardless of whether the cam foil comes off or the rattle lever rotates, and the knitting yarn is not changed, so the yarn path that feeds yarn for each knitting course of the knitting machine and the yarn feeding are stopped. By creating a program in advance for the yarn path to be knitted, and instructing the device of the present invention with a signal based on the program from the control device, new knitting yarn can be supplied to the knitting needles at any time, and the knitting yarn being knitted can be cut. By stopping the supply to the knitting needles, it is possible to obtain a knitted product with a complex pattern.In particular, since a latch claw that engages both the selector and the cam foil is provided on the latch lever, the solenoid with low output even at the start of operation. It operates quickly, reliably, and stably, and there is no need to apply surge voltage, so it is possible to simplify the electronic circuit and reduce power consumption. Since the opening and closing are forcibly performed by a cam, the operation is light and the knitting yarn can be cut reliably.

[Brief explanation of drawings]

1 to 8 are partially omitted side views showing the operating state of the device of the present invention. 1...Solenoid, 3...Selector, 7...Cam shaft, 10...Thread path operating cam, 11...Operating cam,
14...Rack claw, 16...Thread guide, 18...Thread guide operating lever, 23...Scissors, 27...Scissors operating lever.

Claims (1)

[Claims] 1 In a knitting yarn changing device for a circular knitting machine that operates multiple yarn paths individually based on a program to change knitting yarns, it is connected to a solenoid and the plunger tip of the solenoid, and swings as the plunger moves back and forth. cam wheel, thread guide operating cam, and scissors operating cam that rotate simultaneously on the cam shaft, and the actuator rotates the cam shaft at a reciprocating angle of 90 degrees every time the cylinder of the knitting machine rotates. a latch lever, the latch lever is pivotally supported on the latch lever, and its tip has a notch in the cam foil, and its rear end has a latch pawl that engages with the selector, and a convex portion that abuts on the thread guide operating cam; a thread guide operating lever that swings as the guide operating cam rotates; and a thread guide operating lever connected to the thread guide operating lever;
It has a yarn path that moves back and forth between a yarn feeding position and a yarn feeding stop position as a result of the swinging of a yarn path operating lever, and two convex portions that come into contact with the scissors operating cam, which swings as the scissors operating cam rotates. The scissors are composed of a fixed blade and a movable blade, which are connected to the scissors operating lever and open and close the movable blades in response to the swinging of the scissors operating lever and the forward and backward movement of the thread path. Yarn exchange device for circular knitting machines.