JPH0367126B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an apparatus for manufacturing a yarn whose periphery is covered with a knitted fabric (herein referred to as a knitted fabric covered yarn).

(Prior art) In recent years, knitted fabric covered yarns have been provided in which a core yarn is made of gold and silver thread, ordinary thread, etc., and the surroundings are covered with knitted fabrics made of other different types of yarns (Utility Model Act No. 59-28054).
issue).

Conventionally, the knitted fabric covered yarn is as shown in FIG.
Knitting device part A′ and knitting yarn supply part (knitting yarn bobbin)
It was manufactured using a knitted fabric covered yarn manufacturing apparatus in which C was integrally constructed. That is, this device consists of a fixed machine base 1, a through hole in the center of which the lower end is fixedly attached to the machine base 1, through which the knitted fabric covering yarn Z is inserted, and a guide in the vertical direction on the periphery. A needle barrel body 2 in which a groove is formed, a plurality of knitting needles 3 with a latch which are disposed movably up and down in the guide groove and have a protrusion in the radial direction at the lower part, and a protrusion of the knitting needle with the latch 3 on an inner peripheral wall. A rotating cylinder 4' is formed with a circumferential guide groove for raising and lowering the needle and rotates around the needle cylinder 2, and a core is attached to the outer periphery of the rotating cylinder 4' so as to rotate integrally. A guide bar 5 having a guide hole 5a that guides the yarn X from above to below, and a bobbin C for knitting yarn Y, which is also attached to the outer circumference of the rotary cylinder 4' so as to rotate integrally, are rotatably held. It has a support bar 30. Further, the support bar 30 is provided with a tension roller 31, and the guide bar 5 is provided with a tension guide bar 6'.

Then, the core yarn X is supplied downward from the guide hole of the guide bar 5 through the through hole of the needle barrel 2, while the knitting yarn Y flows around the needle barrel 2 integrally with the rotating barrel 4'. The rotating bobbin C passes through the tension roller 31 and the tension guide bar 6' and is supplied to the knitting needle 3 with a latch on the circumferential side of the rotating cylinder 4' which is fixed. The protrusion engages with a guide groove on the inner circumferential wall of the rotating rotating barrel 4' and is moved up and down to knit around the core thread X in the through hole at a position immediately above the needle barrel 2. It acts to knit the fabric and form the fabric covering yarn. These knitted fabric covering yarns are then wound onto a reel (not shown) located below. In this manufacturing device, the knitting yarn Y is placed on the rotating cylinder 4' and is supplied while being rotated integrally with the knitting around the core yarn X, so that the knitted fabric is knitted around the core yarn. When the knitted fabric is twisted, no twist occurs in the knitted fabric.

(Problem to be solved by the invention) However, the above knitted fabric covered yarn manufacturing apparatus
Rotating parts (rotating cylinder, guide bar, support bar, etc.)
is disposed unbalanced in terms of mass with respect to its center of rotation, so center runout occurs when rotated at a rotation speed higher than a predetermined number of rotations. In particular, since the amount of knitting yarn wound on the bobbin on the support bar decreases over time, even if the bobbin is fully wound with knitting yarn and the above rotating part is balanced, the knitting yarn on the bobbin The amount changes from the beginning and during each process of use, and the balance state is constantly changing (gradually becoming unbalanced).

This unbalance causes core swing, which causes yarn breakage, poor knitting, increased noise, and reduced service life of the device, making it impossible to use the manufacturing device at a rotation speed higher than a predetermined number of revolutions. Specifically, the limit is approximately 200 to 300 rpm.

In addition, because the knitting yarn is configured to rotate together with the rotating cylinder to prevent twisting during knitting, it is not possible to place too much yarn on the rotating body. As a result, the knitting yarn runs out in a short period of time, and each time the knitting yarn runs out, the device must be stopped and the knitting yarn must be replenished. In the textile (spinning) industry, where operations are generally carried out 24 hours a day, this frequent supply of knitting yarn significantly increases the number of workers per machine, resulting in lower prices. This means that large-scale industrial production cannot be carried out (profitably).

As mentioned above, the knitted fabric covered yarn manufacturing device with the above configuration has the disadvantage that knitting cannot be performed at high speed (there is a limit to increasing the number of rotations), and the knitting yarn cannot be knitted continuously (over a long period of time). Due to the disadvantage of not being able to be supplied continuously (continuously), there was a problem that a dramatic improvement in productivity could not be expected and large-scale industrial production could not be carried out.

The present invention was made in view of the above problems, and
It is an object of the present invention to provide a knitted fabric covered yarn manufacturing device that can be mass-produced as described above.

In addition, as a device that does not cause unbalance in the rotating parts, a device such as the one shown in FIG. 7 in which the bobbin C of the knitting yarn is arranged on the center of rotation may be considered, but in this case also, the knitting yarn does not flow continuously. The problem of not being able to supply remains, and there is no fundamental solution to the above issues.

(Means for Solving the Problems) The knitted fabric covered yarn manufacturing apparatus according to the present invention includes a machine base that supports the entire machine, a through hole in the center through which the knitted fabric covered yarn is inserted, and a peripheral part supported by the machine base. a needle barrel body having a guide groove formed in the vertical direction; a knitting needle disposed in the guide groove so as to be movable up and down and having an engaging part formed in a part thereof; and a cam that raises and lowers the engaging part of the knitting needle. (1) The knitting device is configured such that the cam portion is fixed to the machine base and the needle barrel is rotatable. , (2) a bobbin for knitting yarn and core yarn is attached to the outside of the knitting device; A clamping means is provided on the downstream side of the knitting device to freely feed the knitted fabric covered yarn to the reel side and restrain movement in the untwisting direction, and a rotating mechanism that rotates in the untwisting direction with respect to the knitted fabric covered yarn. It is characterized by the arrangement of an untwisting device consisting of.

(Function) Therefore, in the knitted fabric covered yarn manufacturing device configured as described above, only the needle barrel (including the knitting needles) closest to the rotation center rotates, so that the inertial force accompanying the rotation is reduced. As a result, extremely smooth high-speed rotation can be achieved. In particular, even if there is some mass imbalance caused by manufacturing errors or assembly errors, the adverse effect on center runout can be minimized, so high speed rotation can be achieved.

Furthermore, since the knitting yarn is placed outside the knitting device, a bobbin with a large capacity can be used, so that it can be continuously supplied according to a desired time.

Furthermore, the twist occurring in the knitted fabric covering yarn due to the knitting yarn being placed outside the knitting device and not being supplied to the knitting needles while rotating in accordance with the knitting, can be avoided by the pinching means placed on the trailing side. With the untwisting device, the rotation mechanism of the untwisting device rotates the twist applied to the knitted fabric covering yarn in the untwisting direction while it is held in the upstream side, so that the twist of the knitted fabric covering yarn is untwisted and the twist is removed. It is wound onto the reel without any

Therefore, the knitting speed can be greatly increased, and the knitting yarn can be continuously supplied, so that continuous operation is possible, and as a result, productivity can be dramatically improved.

(Example) Examples of the present invention will be described below.

Fig. 1 is an overall configuration diagram of the knitted fabric covered yarn manufacturing device according to the present embodiment, Fig. 2 is a perspective view of the knitting device portion of the knitted fabric covered yarn manufacturing device, and Fig. 3 is the interior of the knitting device portion. Longitudinal cross-sectional view at the center showing the structure, No. 4
FIG. 3 is a perspective view of the untwisting device.

In FIG. 1, A is a knitting device operated by a drive device _M1 , B is a knitting device operated by a drive device _M2 , and twisted knitted fabric covering yarn Z from the knitting device A is shown.
C is a bobbin that supplies knitting yarn Y to knitting device A; D is a bobbin that untwists core yarn X to knitting device A.
The bobbin 25 that is supplied to the retwisting device B is a nipping roller (clipping means) for not transmitting the tension generated when winding up with the reel of the untwisting device B to the upstream side.

As shown in FIG. 2 or 3, the knitting device A includes a drive pulley 10 rotatably supported on a machine base 1 via a thrust bearing 20,
A needle barrel body 2 is integrally fixed onto the drive pulley 10 via a screw mechanism 21 and has a guide groove 2b formed in the vertical direction on its periphery, and a needle barrel body 2 is disposed in the guide groove 2b so as to be movable up and down. A plurality of latch knitting needles 3 are provided and have a protruding part (engaging part) 3a in the radial direction at the lower part.
A circumferential cam groove 4a whose position changes vertically is formed on the inner circumferential wall for raising and lowering the protrusion 3a of the knitting needle 3 with latch, and is mounted on the machine stand 1 via a bearing 22 and a support fitting 23. A fixed outer cylindrical body 4, a guide bar 5 having a guide hole 5a integrally attached to the outer periphery of the outer cylindrical body 4 and guiding the core thread X from above to below, and a guide hole of this guide bar 5. It is attached to the lower end of 5a, and the lower end is 5 to 7 mm above the upper end of the needle barrel body 2.
Knitting yarn Y from a pipe-shaped core yarn guide 24 that extends up to It is equipped with tension guide bars 6A and 6B that guide it to the vicinity.

Further, as shown in FIG. 4, the untwisting device B has a movable plate 8 having a hole 8a in the center and moving at a constant speed within the range of the height (length) h of the winding drum of the reel 7. , a rotating ring (rotating mechanism) 9 having a hole 9a through which the knitted fabric covered yarn Z passes through and rotatably disposed around the hole 8a of the movable plate 8, and the needle barrel 2 ( The reel 7 rotates about an axis parallel to the moving direction of the moving plate 8 in synchronization with the rotation of the moving plate 8 (see FIG. 1).

The bobbin C for knitting yarn has the same basic structure as a known bobbin, but has a larger winding capacity than the conventional bobbin for knitting yarn described above. That is, the main knitted fabric covered yarn manufacturing apparatus is set to such an extent that it can be used continuously for 12 hours or 24 hours.

Further, the basic structure of the bobbin D for the core yarn is the same as that of a known bobbin, and the winding capacity is set to such an extent that the main knitted fabric covered yarn manufacturing apparatus can be used continuously for 12 or 24 hours.

It is preferable that these bobbins C and D rotate smoothly (lightly) in order to smoothly supply the knitting yarn and the core yarn, but on the other hand, they should be rotated so that the knitting yarn and the core yarn are not loosened when being fed out. It is preferable to provide some resistance to rotation.

Further, between the knitting device A and the untwisting device B, a nipping roller 25 is arranged to nip the twisted knitted fabric covering yarn Z passing between the knitting device A and the untwisting device B.

Therefore, in the main knitted fabric covered yarn manufacturing apparatus having the above configuration, when manufacturing the knitted fabric covered yarn, the drive pulley 1
0 rotation causes the needle barrel body 2 to rotate integrally with the drive pulley 10, and this rotation causes the knitting needle 3 with a latch to move up and down within the guide groove 2b on the circumference of the needle barrel body 2. This lifting and lowering is performed by moving the protrusion 3a of the latch knitting needle attached to the rotating needle barrel 2 side into the cam groove 4a of the fixed (stationary) outer barrel 4.
This is done by sliding in the cam groove 4a to follow the vertical positional change of the cam groove 4a.

The untwisting device B on the downstream side of the needle barrel 2 rotates in synchronization with the needle barrel 2.

Then, by supplying the core yarn and the knitting yarn to the knitted fabric covered yarn manufacturing apparatus that operates as described above, the knitted fabric covered yarn is manufactured as follows. That is, the core yarn X wound around the bobbin D disposed outside the knitting device A
is guided to the through hole 2a of the needle barrel body 2 via the guide hole 5a of the guide bar 5 and the core thread guide 24. Also, the knitting yarn Y wound around the bobbin C, which is also arranged outside the knitting device A, passes through guide pins 6A and 6B attached to the guide bar 5, and is passed through the knitting needles with latch, which rotate and move up and down. 3, where it is hooked onto the raised latch knitting needle 3, and drawn downward by the latch knitting needle 3, which moves downward while rotating, to form a stitch. On the other hand, following the knitting needle 3 with a latch, the next knitting needle 3 with a latch moves up and performs the same operation as above to form an adjacent stitch. In this way, when the number of stitches equal to the number of latch knitting needles 3 is formed,
Move on to forming the next row of stitches. Then, each time a stitch is formed, the stitch enters downward from the through hole 2a at the center of the needle barrel body 2 together with the core thread X. At this time, the core yarn X is covered, and a knitted fabric covered yarn Z is formed when it enters the through hole 2a. The latch knitting needle 3 moves up and down very close to the core yarn X,
Since this core yarn X is covered by the core yarn guide 24 up to the vicinity of the upper end of the through hole 2a of the needle barrel body 2, it will not be caught by the latch knitting needles 3 and interfere with the knitting operation.

Then, the knitted fabric covered yarn Z formed as described above
The needle cylinder body 2, i.e., the knitting needles with latch 3, knits while rotating, but is fed from a certain (fixed) location, so that twist is applied, and in this state, the knitting needles are twisted through the nipping rollers 25. Backstream side untwisting device B
is supplied to

In the untwisting device B, the knitted fabric covered yarn Z is wound onto the reel 7 through the hole 9a of the rotating ring 9 on the movable plate 8 that moves in the longitudinal direction of the reel 7. At this time, the knitted fabric covered yarn is wound onto the reel 7 while being untwisted. That is, the knitted fabric covered yarn is placed on a movable plate 8 that is located in a space on the outer periphery of the reel 7 and moves in the longitudinal direction of the reel 7, and rotates in the untwisting direction as the reel 7 rotates. Thereafter, the knitted fabric covering yarn Z is untwisted because it is wound up on a reel 7 rotating around an axis parallel to the direction of movement.

By the way, the untwisting action in the untwisting device B does not extend to the upstream side of the nipping roller 25 because the untwisting action is held by the nipping roller 25 on the upstream side thereof. Similarly, the tension generated by the winding operation of the reel 7 is blocked by the nipping roller 25, so that it does not affect the knitting operation on the upstream side.

As mentioned above, according to the main knitted fabric covered yarn manufacturing device, only the needle barrel (including the knitting needle with latch) that is closest to the rotation center and has a small mass rotates, so even if it rotates at high speed, the rotating mass is small. Therefore, center swing can also be minimized. Moreover, since the knitting yarn including the bobbin C in the rotating part is disposed outside the knitting device, the bobbin for the knitting yarn can be made as large as desired, and therefore the knitting yarn can theoretically It becomes possible to supply an infinitely long yarn, and as a result, continuous operation of the main knitted fabric covered yarn manufacturing apparatus becomes possible.

Incidentally, in place of the untwisting device of the above embodiment, a fifth
Even if a rotation mechanism is provided that rotates the support base 27 supporting the reel 7 in the untwisting direction in synchronization with the rotation of the needle barrel as shown in the figure, untwisting cannot be done. can. However, in this structure, the untwisting device becomes large, which is not preferable compared to the above-mentioned embodiment.

Further, the knitting needles with a latch may be raised and lowered by a pair of a cam groove and an engaging portion (cam follower) that engages with the cam groove as described above, or by other known cam mechanisms (not shown) (for example, , a cam surface and a cam follower in contact with the cam surface.

(Effects of the Invention) According to the present invention, it is possible to provide a knitted fabric covering yarn manufacturing device that rotates at high speed and can continuously supply any number of knitting yarns and core yarns as required. The production of loose knitted fabric covering yarns can be carried out on a large scale industrially.

Therefore, knitted fabric covered yarns, which were conventionally expensive, can be supplied at low cost and in large quantities, and can be used as fabrics in fields that have hitherto been unusable.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram of the knitted fabric covered yarn manufacturing device according to the present embodiment, Fig. 2 is a perspective view of the knitting device portion of the knitted fabric covered yarn manufacturing device, and Fig. 3 is the internal structure of the knitting device portion. FIG. 4 is a perspective view of the untwisting device, FIG. 5 is a perspective view of another embodiment of the untwisting device, and FIG. 6 is a conventional knitted fabric covered yarn manufacturing device. FIG. 7 is a side view showing the improved knitted fabric covered yarn manufacturing apparatus of FIG. 6. A... knitting device, B... untwisting device, C...
Bobbin for knitting yarn, D... Bobbin for core yarn, X... Core thread, Y... Knitting yarn, Z... Knitted fabric covering yarn, 1... Machine stand, 2... Needle barrel body, 3... Latch Knitting needles (knitting needles).

Claims (1)

[Scope of Claims] 1. A machine base that supports the entire body, and a needle barrel supported by the machine base and having a through hole in the center through which the knitted fabric covering yarn is inserted, and a guide groove formed in the vertical direction on the periphery. A knitting fabric covered yarn manufacturing device having a knitting device comprising: a knitting needle disposed in the guide groove so as to be movable up and down and having an engaging part formed in a part thereof; and a cam part that raises and lowers the engaging part of the knitting needle. (1) The knitting device is configured such that the cam portion is fixed to the machine base and the needle barrel is rotatable, and (2) the bobbin of knitting yarn and core yarn is connected to the knitting device. (3) a reel of the knitted fabric covered yarn on the downstream side of the knitting device, in order to untwist the knitted fabric covered yarn generated in the knitting device to the downstream side of the knitting device; A knitting machine characterized by being provided with a clamping means that can be freely fed to the side and restraining movement in the untwisting direction, and also provided with an untwisting device consisting of a rotating mechanism that rotates the knitted fabric covering yarn in the untwisting direction. Ground covering yarn manufacturing equipment.