JPS6364539B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a circular knitting machine for knitting double knits using vertical needles and horizontal needles.
This invention relates to a needle selection device that automatically operates a jack to select needles in three positions: tuck and knit.

Conventionally, in order to select needles in the three positions of welt, tuck, and knit on a circular knitting machine, each knitting needle had to be manually set in advance. Therefore, it was not possible to select needles during knitting, and the knitted fabric had the same structure over and over again, making it impossible to knit a pattern with variation.

This invention is a so-called three-position selection method in which the knitting needles of a circular knitting machine are first selected for the welt side and the tuck side, and then the knitting needles selected for the tuck side are secondly selected for the tuck and knit. The needle is automatically moved by rotating and indexing a circular plate with an arbitrary number of pins implanted on multiple diameters and concentric circles using a pulse motor, and then using the pins indexed at predetermined positions to drive the needle. The object of the present invention is to provide a needle selection mechanism that appropriately removes the butt from the cam surface. The pins implanted on multiple diameters of the disk and on multiple concentric circles allow the first needle selection and the second needle selection to be performed simultaneously on both sides of the center of the disk.

EMBODIMENT OF THE INVENTION Below, the case where the embodiment of this invention is applied to the dial side of a stockinette circular knitting machine is demonstrated based on drawing. Reference numeral 1 denotes a cylinder of a circular knitting machine, which has a cylindrical shape, has a center line perpendicular to the left side of FIG. 1, and is rotated by a drive device (not shown). 2 is a vertical knitting needle that is moved up and down by the rotation of the cylinder 1. 3 is a disc-shaped dial provided on the top of the cylinder 1, and is rotated around the same center line as the above-mentioned center line. Reference numeral 4 denotes needle grooves carved at equal angular intervals radially outward from the center line on the upper surface of the dial 3, and has a rectangular cross section, and the bottom surface is a horizontal surface 5 near the outer periphery and a radial direction inside thereof. It consists of a lower surface 6 having an arcuate shape. Groove 4
Inside, a jack 7 is inserted horizontally near the center, and a knitting needle 8 is loosely inserted outside of the jack 7, and the jack 7 is always urged upward by a spring 9 attached to the arcuate bottom surface 6. . Reference numeral 10 denotes a disc-shaped cam base which is concentric with the dial 3 and fixed to the main body (not shown). Reference numeral 11 is a disc-shaped dial cam that is connected to the base 10 with a slight gap between the upper surface of the dial 3 and the dial cam.
It is fixed concentrically to the bottom surface of. A first cam groove 13 that engages with the butt 12 of the knitting needle 8 and a second cam groove 15 that engages with the butt 14 of the jack 7 are carved on the lower surface of the dial cam 11. It is composed of a welt cam surface 15A, a tack cam surface 15B, and a nit cam surface 15C. 16 is the first turning point A of the welt cam surface 15A and the tuck cam surface 15B, and the tuck cam surface 15
This is a needle selection mechanism provided at a position straddling B and the second turning point B of the Nitto cam surface 15C. Then, this needle selection mechanism 16 either brings the butt 14 of the jack 7, which is in contact with the welt cam surface 15A, into contact with the tuck cam surface 15B at the first turning point A to operate the knitting needle 8, or removes the butt 14 from the cam surface. a first needle selection section 17 that selects whether or not to operate the knitting needle 8;
The butt 14 of the jack 7, which is in contact with the jack 5B, is brought into contact with the knitting cam surface 15C at the second turning point B to operate the knitting needle 8, or the butt 14 is removed from the cam surface to prevent the knitting needle 8 from operating. It has a second needle selection section 18 that performs this needle selection. Reference numeral 19 is a bracket of the needle selection mechanism 16, which is fixed to the cam base 10. 20 is a pulse motor attached to the upper surface of the bracket 19; 21 is a disk attached to the output shaft of the pulse motor 20 and has a size spanning the two turning point positions; 2;
Pins 2 are inserted into pin holes 23, which are formed in a plurality of concentric circles at equal angular intervals in a plurality of rows on the diameter of the disk 21 at equal pitch intervals in each row, according to the knitting structure. FIG. 4 shows an example of the arrangement of the pin holes 23 and pins 22. Reference numeral 24 denotes an upper presser plate pivotally supported on the bracket 19 in a direction substantially perpendicular to the second cam groove 15 in the first needle selection section 17 and arranged in parallel at the same pitch as the pin holes 23. When one row of the pin holes 23 is indexed to a predetermined position, it corresponds to each pin hole. Reference numeral 25 designates a plurality of jack press plates arranged in parallel in a direction perpendicular to the upper press plate 24 and pivotally supported by the bracket 19, each having one butt 26 on its upper surface. A leaf spring 27 is attached to the lower surface of the bracket 19 and engages with each jack presser plate 25 to constantly bias the jack presser plate 25 upward. The jack 7 has a raised butt 14A and a lowered butt 1 on both sides, as shown in detail in Figure 5.
4B, and has a plurality of needle selection butts 14C in the middle. This needle selection butt 14C is broken off as appropriate depending on the texture to be knitted, but the number of needle selection butts 14C to be broken off and the number of jack presser plates 25,
The number of upper presser plates and the number of pin holes 23 drilled in one row on the radius of the disk 21 are all made to match. In this embodiment, this number is eight, and the jacks 7 are constructed as a set of six jacks. Six of the eight needle selection butts provided on one jack 7 are of a specific 1×1A,
These are used to organize a 1×1B structure, etc., and the remaining two are used to organize an arbitrary structure. Therefore, for a set of 6 pieces of jack 7, each 8 needle selection butts are 14C.
Among them, six needle selection butts are as shown in Figure 6.
The positions of the needles are changed and one needle is left and the other is broken off, and the remaining two needle selection butts are broken off according to the desired structure. Further, the butts 26 of each of the eight jack presser plates 25 are also attached one by one with their positions changed one by one.
The second needle selection section 18 is also provided with exactly the same mechanism including an upper presser plate, a jack presser plate, and a leaf spring.

Next, the effect will be explained. The needle selection mechanism 16
If this does not work, the jack 7 is pushed upward by the spring 9, so the butt 14 is stuck in the second cam groove 15 of the dial cam 11, and as the dial 3 rotates, the jack 7 moves upward. It moves in the radial direction within the groove 4 following the cam groove 15. Due to this movement, the knitting needles 8 are also moved in the radial direction within the groove 4. When the needle selection mechanism 16 operates, a pin 22 is appropriately implanted in each pin hole 23 of the disc 21 according to the desired tissue, and the disc 21 is rotated and indexed by the operation of the pulse motor 20. The required hole row is located directly above the upper presser plate 24. The pins 22 implanted in this hole row push down only the corresponding upper presser plate 24. Each of the eight jack presser plates 25 is attached with the butt 26 sequentially changed one by one, so that when the upper presser plate 2 is pushed down,
4, the jack presser plates 25 are pressed down one by one. Also, in each set of six jacks 7, at least one of the eight needle selection butts 14C is left behind with at least one changed in position, so that the jacks 7 are attached to the jack presser plate 25 that has been pushed down. Correspondingly, Jack 7 himself is always 1
The sheet is pushed down. When the jack 7 is pushed down in this manner, the raising butt 14A and needle selection butt 14C are removed from the second cam groove 15, and the knitting needles 8 are not moved. That is, in the first needle selection section 17, the knitting needles 8 corresponding to the jacks 7 that were pushed down are selected to the welt side, and the knitting needles 8 corresponding to the jacks 7 that were not pushed down are selected on the welt side.
This means that Tatsuku was forced to select the needle. Similarly, in the second needle selection section 18, the knitting needles 8 corresponding to the jacks 7 that were pushed down were selected for tacking, and the knitting needles 8 corresponding to the jacks 7 that were not pushed down were selected for knitting. become. In this way, while the knitting is progressing, the pulse motor 20 is activated arbitrarily to rotate the disk 21, and the weave is changed at any time by associating different rows of pins with the upper presser plate 24. It is.

As described in detail above, in the present invention, when selecting needles in the three positions of welt, tuck, and knit, a needle selection mechanism is attached to the turning point of the knitting cam, and this needle selection mechanism uses a pulse motor to pin the needles. The butt of the jack can be arbitrarily removed from the cam groove by using a pin indexed at a predetermined position by rotating and indexing the disk in which the disk is implanted. Needle selection is performed as a fixed pattern, and needle selection can be changed at any time, making it possible to freely change the knitting structure.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, FIG. 3 is a diagram showing the relationship between the presser plate group and the second cam groove, and FIG. FIG. 5 is an enlarged view of the jack, and FIG. 6 is a diagram showing the relationship of needle selection butts in a set of six jacks. 7... Jack, 8... Knitting needle, 11... Dial cam, 14... Jack butt, 14C...
Needle selection butt, 19... Bracket, 20... Pulse motor, 21... Disc, 22... Pin, 24...
... Upper presser plate, 25... Jack presser plate, a,
B...The turning point.

Claims (1)

[Scope of Claims] 1. In a circular knitting machine in which knitting is performed by moving knitting needles by engaging a butt of a jack with a knitting cam and moving it following the knitting cam, two of the knitting cams
a pulse motor installed between the two turning point positions; a disk having a pin hole, a pin implanted in the pin hole according to the knitting structure, and the pin supported and indexed at a predetermined position corresponding to each of the two turning points. and a plurality of needle selection butts that abut on each of the other pressed down groups of butts that engage with the knitting cam, and are arranged in the needle groove of the needle bed. A pulse motor is operated to index the desired pin row to a predetermined position, and the needles can be arbitrarily selected from three positions: welt, tuck, and knit at two turning points. A needle selection device for a circular knitting machine, which selects needles in a fixed pattern by 2. The needle selection device for a circular knitting machine according to claim 1, wherein the plurality of needle selection butts of the jack include butts for arbitrary tissues in addition to those for specific tissues.