JPS6247984B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a knitting cam device in an automatic flat knitting machine, particularly a jacquard knitting machine. However, the object of the present invention is to use a cam mechanism with as few moving parts as possible to select three types of knitting needles: a knit position, a tuck position, and a non-working position when knitting one course.

It is known that conventional jacquard knitting machines have the function of selecting needles in three positions: knit, tuck, and miss using the same knitting cam group. In order to do this, several retractable pressers are required in one uniting cam group of the carriage, and the position of the jack is moved to three different positions, and the presser cam separates the jack into a hit, a hit, and a miss. However, it was necessary to carry out complicated operations in order to select three different types of needles, leading and trailing, during the same course.

In addition, the Nitsuting cam has a middle mountain and an upper mountain,
In a knitting machine with a cam mechanism in which knitting is performed by moving these needles in and out, it is impossible to select needles separately in each of the leading and trailing cam groups within the same course.

The present invention has been made in view of these points,
An example of its implementation will be described below with reference to the drawings.

Fig. 1 shows a cam configuration diagram of a double cam. A,
Reference numeral B denotes a uniting cam group arranged on the left and right sides of the center of the carriage, and transfer cam groups C and D are arranged on both sides. Since the knitting cam groups A and B and the transfer cam groups C and D have the same structure, the knitting cam group will be explained based on the knitting cam group A.

Reference numeral 1 is a tenzan, with dowels 2 and 3 provided on both sides thereof so as to be slidable in the direction of the arrow. Between the knitting cam groups A and B are an upper leveling cam 4 and a lower leveling cam 5 for leveling the needles pulled down in the second step to a constant height.
will be established. Nitting cam group A and transfer cam group C
Similarly, an upper leveling cam 6 and a lower leveling cam 7 are provided between them. A raising cam 8 is provided below the tenzan 1 for the purpose of acting on a first jack to be described later and raising and knitting needles that move in conjunction with the first jack. The raising cam 8 positions the highest part in the center,
A stepped portion 8C is formed on both sides thereof. The highest part is the knitting position and the stepped part is the tuck position. Butt grooves 8d, 8 are formed in a roughly inverted V-shape from the stepped portions 8C, 8C toward the lower center of the raising cam 8.
d, and the lower portions of the grooves 8d and 8d are inclined surfaces 8
e, 8e and the depth of the groove is deepened. Its cross section is shown in FIG. Between the raising peaks 8 and 8 of the uniting cam group A and unit B, there is a
A non-working position guiding cam 9 is provided for lowering the jack and guiding it to a non-working position. A non-working position guiding cam 10 having the same purpose is also provided between the knitting cam group A and the shifting cam group C. A pressing cam 11 for pressing the butt of the first jack into the groove from a plane direction is provided below the raising cam 8 and non-operating position guiding cams 9 and 10, and sloped surfaces 11a and 11 are provided at both ends of the pressing cam 11.
A is provided. A receiving cam 12 is provided in contact with the lower part of the pressing cam 11 and spans the entire width of the knitting cam groups A, B and the transfer cam groups C, D, and is pushed down to the non-working position by the non-working position guiding cams 9, 10. It also serves to prevent the butt of the first jack pressed by the pressing cam 11 from falling. That is, the pressing cam 11 is connected to the lower edge of the raising cam 8 and the upper edge of the receiving cam 12.
sandwiched between. Here, the raising cam 8 and the receiving cam 12
Since the height in the direction perpendicular to the drawing is higher than the height of the pressing cam 11, the raising cam 8 and the receiving cam 12
A passage groove for the first jack butt is formed between the two. In the above, the raising cam 8 is not in contact with the pressing cam 11 at the center of its lower edge, and forms a recess into which the jack butt 25b can fit when it protrudes from the groove 21 of the groove plate 20. are doing.

At the bottom of the pressing cam 11, there are provided a cam 13 for pressing down a select jack butt and a return cam 14, which will be described later. Between both cams, there is a raised ridge 8 and a butt guide groove 1 located below the inactive position guide cams 9 and 10.
5 is provided in a roughly V-shape. Relief portions 16 are provided in the return cam 14 at both ends of the guide groove 15. A cross section of the butt guide groove 15 and relief portion 16 is shown in FIG.

17, 18, and 19 are selectors, and the number of actuating pieces 17 is the same as the number of butts of the select jack, which will be described later.
a, 17b..., 18a, 18b..., 19a,
19a...

Next, the needle and jack will be explained.

Reference numeral 20 denotes a groove plate into which a needle 23, a first jack 24, and a second selection jack 25 are slidably inserted into a plurality of grooves 21 provided in parallel, and a needle holding band 26,
A jack presser band 27 prevents the needle 23 and the first jack 24 from falling off. A select jack groove plate 28 is provided to cover the groove 21 in the portion where the second select jack is inserted. A first select jack 30 is slidably inserted into the select jack groove 29 of the select jack groove plate 28. A small hole 31 is provided in the select jack groove plate 28, and the protrusion 32 of the first select jack 30 projects from the small hole 31, and the second select jack 25
is in contact with. Since the second select jack 25 has a protruding portion 25a in the center that contacts the bottom of the groove 21, when pushed by the protruding portion 32 of the first select jack 30, the butt 25b at the top of the second select jack It protrudes outside the groove 21. The first select jack 30 includes the aforementioned selectors 17 and 1.
8, 19 working pieces 17a, 17b..., 18a,
The same number of bats 30a, 30b... (eight types in this embodiment) as the number of bats 18b..., 19a, 19b...
...is provided. 33 and 34 are presser bands for the first select jack.

Next, the operation of the device of the present invention will be explained.

The first jack 24, which has passed through the transfer cam group C, engages its butt 24a with the inactive position guide cam 10, and is lowered by the cam 10 to the welt position. At this point, the selector 17 operates based on a pre-stored command,
An operating piece 17a, for example, protrudes, so that the operating piece 17a and the butt 30a of the first select jack 30 are brought into contact, the butt 30a of the first select jack 30 is pushed down, and the protrusion 32 is pressed down against the second select jack 30. 25, the second select jack 25 swings about the protrusion 25a and causes the butt 25b to protrude from the groove 21. At this time, the butt 25b is connected to the push-down cam 13 and the return cam 1.
4 into the butt guiding groove 15. The butt 25b that has entered the groove 15 is connected to the inclined surface 14 of the return cam 14.
It contacts a and rises on the same plane. At this time, the butt 24a of the first jack 24 has already been pressed inwardly into the groove 21 of the groove plate 20 by the inclined surface 11a of the pressing cam 11. The butt 24a of the first jack 24, which is pushed by the rise of the butt 25b of the second select jack 25, separates from the pressing surface of the pressing cam 11 and moves the pressing cam 11 and the non-acting position guiding cam 10.
into the groove 35 between the upper side 11 of the pressing cam 11
a', the needle 23 comes into contact with the raising cam 8, and is further raised by the raising cam 8 to position the needle 23 at the knit position.

The butt 24a of the first jack 24 corresponding to the first select jack other than the first select jack having the butt 30a whose needle was not selected by the selector 17 is the first select jack whose needle was selected by the selector 17. Unlike the butt 24a of the first jack 24 corresponding to No. 30, the butt 24a of the first jack 24 does not come off from the inclined surface 11a of the pressing cam 11, and the pressing cam 1 remains as it is.
1, the jack butt reaches the central lower part of the cam 8 within the passage groove of the jack butt. At this time, the operating piece 18b of the selector 18,
18c... and the corresponding butts 30b, 3 of the first selection jack 30.
0c... comes into contact with. Then, as in the case of the needle raised to the above-mentioned knit position, the first needle having the butt 30b pressed by the protruding working piece 18b
The select jack 30 is the second select jack 2
By pressing 5, the butt 25b of the second select jack 25 is projected, and the butt 25b is placed on the inclined surface 1.
4a', thereby raising the second select jack 25, thereby raising the first jack 24.
is pushed up to remove the butt 24a of the first jack 24 from the pressing cam 11, and feed it into the butt groove 8b of the raising cam along the inclined surface 11b. As a result, the butt 24a rises along the inclined surface 8b of the raising cam 8, and the needle 23 rises to the tuck position.

The butts 24a of the first jacks 24 corresponding to the remaining first select jacks 30 not selected by the selector 18 pass under the raising cam 8 while being pressed by the pressing cam 11.

As described above, the needles selected on the forward side of the raising cam 8 are in the knit position, the needles selected in the center of the raising cam 8 are in the tuck position, and the needles that are not selected at all are in the welt position. be selected.

The first jack 24, which is in the knit position and the tuck position, brings the butt 24a into contact with the inactive position guiding cam 9, and is guided to the welt position at the carriage center position.

The above operation is performed in the unit B of uniting cams in the same manner as in unit unit A.

As described above, the device of the present invention is capable of separately selecting needles for knits, tacks, and misses within the same course, not only for a single cam group but also for any of the leading cam group and the trailing cam group. Since the cam portion does not use any retractable cams and only has fixed cams, a cam operating mechanism can be completely eliminated.

Furthermore, since there is no need for the conventional raising cam that directly acts on the needle selection, accidents caused by needles such as needle breakage can now be eliminated.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the cartridge cam, Figure 2 is the first
3 is a sectional view taken along the line in FIG. 1, and FIG. 4 is a sectional view taken along the line of FIG. 8... Raising cam, 8C... Step portion, 8d... Butt groove, 11... Pressing cam, 11a... Inclined portion, 1
3...Pushing cam, 14...Return cam, 15...
... Butt guide groove, 17, 18, 19 ... Selector, 23 ... Needle, 24 ... First jack, 24a
...Bat, 25...Second selection jack, 3
0...First selection jack.

Claims (1)

[Claims] 1. A first jack that directly acts on the needle to be selected, a select jack that acts on the first jack, a selector that selects and operates the select jack, and a cam that operates the first jack and the select jack. In an automatic flat knitting machine comprising a carriage having a first jack, the first jack is elastic and allows the butt to sink into the jack groove by bending the trunk when the butt is pressed;
Climbing the first jack's Nitsuting cam group,
A step is formed at a position corresponding to the tuck position, and a butt groove is formed extending from a concave part provided at the lower center of the raised mountain to the step, and is slightly longer than the entire width of the raised mountain, and has sloped portions at both ends. A press cam is provided at the bottom of the raised crest, and selectors are arranged in the center of the raised crest and at the bottom of both ends of the pressing cam, and the selector engages with the butt of the select jack selected by each of the selectors to control the butt. A knitting cam device for an automatic flat knitting machine in which a butt guide groove that ascends and descends is formed by a push-down cam and a return cam.