JP2816700B2 - Electromagnetic needle selection device for circular knitting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electromagnetic needle selecting device for performing pattern knitting of a circular knitting machine.

[Prior Art] Numerous inventions and devices have been conventionally known as electromagnetic needle selection devices for circular knitting machines which enable selection of three positions of knit, tack and welt.

For example, according to the invention of Japanese Patent Publication No. 53-1865 related to the present applicant's patent, permanent magnets are disposed at the upper and lower portions of the jack, respectively, and the magnetic force is balanced around a fulcrum substantially at the center of the jack. By operating the control electromagnet with a signal output from the program, this balance is broken and needle selection is performed.

According to this prior art, the upper permanent magnet attracts / contacts the upper portion of the jack with the extreme surface, and when no signal is input to the control electromagnet, holds the position until the jack is fully engaged with the lifting cam. On the other hand, the lower permanent magnet inherits the jack pulled out by the control electromagnet, pulls it out further, and secures a position until the jack is completely disengaged from the raising cam. Two electromagnets are vertically stacked between the lower permanent magnet and the fulcrum at the center of the jack. There are two types of jacks, each having two types of armatures having different heights in the vertical direction, namely, a low armature and a high armature. The two types of jacks are alternately arranged in the cylinder groove, and control electromagnets are vertically arranged on the same straight line in opposition to the low armature and high armature arrays.

With this configuration, the knit and the welt are selected by the needle selection device of the first yarn feeder, and the tack and the welt are selected by the needle selection device of the second yarn feeder.

[Problems to be Solved by the Invention] In this conventional technique, two needle selecting devices are arranged at a staggered position, so that the distance between each yarn feeder is longer by the two needle selecting devices. Become. Then, in order to enable the manufacture of an electronic pattern knitting machine having multiple yarn feeders, control electromagnets required for needle selection are required for the increased number of yarn feeders. for that reason,
Although it is conceivable to reduce the size of the control electromagnet, it is not possible to reduce the size of the control electromagnet beyond a certain level in order to obtain the magnetic force required for needle selection.

Further, since the knitting needle is directly operated by the jack, a cam stroke for moving the jack up and down requires at least 12 mm. The distance between individual yarn feeders must be shortened by reducing the upper and lower strokes of the jack by reducing the upper and lower strokes of the jack by reducing the cam control width as much as possible. It is difficult to respond to requests.

The present invention has been made in order to solve these problems, and an object of the present invention is to provide an electronic pattern circular knitting machine which enables a multiple yarn feeder by shortening a cam control range. .

[Means for Solving the Problems] According to the electromagnetic needle selection device of the present invention, a large coaxially arranged
A small rotary cylinder, a knitting needle housed in the groove of the small cylinder and a control cam for controlling the knitting needle, an elastic spring jack provided immediately below the knitting needle and a selection cam for disengaging and disengaging the spring jack, Two types of rocking jacks having different heights of armatures accommodated in the groove of the large cylinder and oscillating in the radial direction, and a plurality of stages in the vertical direction with respect to the armatures and horizontal Two sets of control electromagnets, which are also arranged in the same direction, an upper permanent magnet which is disposed opposite to the upper part of the locking jack and fixes the position of the locking jack, and a lower part which is opposed to the lower part of the locking jack. And a lower permanent magnet that balances the magnetic force with respect to the locking jack, and a lower permanent magnet that is disposed above the large cylinder and is located between the spring jack and the locking jack. And Niude lever in conjunction Te bridge,
Select the canceling cam that presses the two-arm lever inward and the welt that disengages the lower part of the spring jack from the engagement of the selection cam, or engages the lower part of the spring jack with the selection cam. A first needle selecting means for previously selecting a transition to tack / knit, and a second needle selecting means for engaging and disengaging a lower portion of the spring jack with a selection cam to select the latter tack / nit. And

Preferably, the lever ratio of one arm to the other arm of the two-arm lever is from 1: 1 to 1: 2, and the shape is L-shaped.

In addition, the knitting machine preferably has a needle selection of 32 gauge or more by arranging large and small cylinders in combination.

[Operation] According to the present invention, when the first and second needle selecting means are not energized, one arm of the two-arm lever is moved by the canceling cam while the upper end of the locking jack is held by the upper permanent magnet. The lower arm of the spring jack is engaged with the selection cam by inserting the other arm, which is rotated downward along with the outward rotation by the elastic force of the spring jack, into the back surface of the locking jack, Selection for shifting to knit / tack is performed in advance by the first needle selecting means, and needle selection of the knit is performed by the second needle selecting means by the same operation as described above.

When the first and second needle selecting means are energized, the magnetic force of the upper permanent magnet and the lower permanent magnet is unbalanced and the armature of the corresponding locking jack is attracted, so that one arm of the two-arm lever is canceled. After the other arm, which is turned upward as it is pressed inward by the ring cam, is pulled out from the back of the locking jack, the lower part of the spring jack is brought into contact with the top by the elastic force of the spring jack. The selection of the welt that is out of engagement with the selection cam is performed by the first needle selecting means, and the tack is selected by the second needle selecting means by the same operation as described above.

As a result, knit, tack, and welted 3
Compared with the conventional device for selecting the position, in the present invention, by providing the two-arm lever between the locking jack and the spring jack, the distance between the needle selection positions can be shortened,
With one yarn feeder, three positions of knit, tack and welt can be selected, and the number of yarn feeders can be increased.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view showing a main part of the knitting unit, and in the figure, reference numeral 1 indicates a small cylinder.

On the outer circumference of the small cylinder 1, a large number of needle grooves 1a extending in the axial direction arranged in a circle are formed.

Each needle groove 1a accommodates a vertically slidable knitting needle 2, and each knitting needle 2 has at least one operating butt 2a.

Immediately below the knitting needle 2, a spring jack 3 having inherent elasticity for selectively raising the knitting needle 2 is housed.

As shown in FIG. 2a, the spring jack 3 includes a shoulder 3a, an upright outer edge 3b, a stem 3c, a selection butt 3d, and a lower bat 3.
e, having a hanging extension 3f.

When the spring jack 3 is raised, the shoulder 3a comes into contact with the bottom of the knitting needle 2 and pushes up the knitting needle 2. The upright outer edge 3b constantly presses the back of the knitting needle 2 outward by the elastic force of the spring jack 3. The stem 3c is a hanging extension 3f of the spring jack 3.
Is a relatively thin elastic body that can be automatically returned to its original position when pushed inward.

As shown in FIG. 1, the first cylinder facing the small cylinder 1
The cam holder 4 has at least one control cam 5 for controlling or operating the knitting needle 2, a selection cam 6 with which the selection butt 3 d of the spring jack 3 is engaged or disengaged, and a lowering for lowering the spring jack 3. A cam 7 is provided.

The first cam holder 4 is mounted on a cam ring 8.

Further, a two-arm lever 10 is accommodated at the upper end of the lower large cylinder 9 corresponding to each spring jack 3 so as to be rotatable in the radial direction of the large cylinder 9.

As shown in FIG.2a, the two-arm lever 10 has an upright arm 10a having an arcuate inner edge, a horizontal arm 10b having an arc-shaped projection 10c at the bottom end, and a circular fulcrum 10d. And an arcuate portion 10e that is continuous with the circular fulcrum 10d and connects both arms 10a and 10b.

The lever ratio between the upright arm 10a and the horizontal arm 10b is 1: 1 to 1: 2
Is particularly preferable, and 1: 1 is particularly preferable.

When the upright arm 10a is pressed inward by the canceling cam 11 and rotated, the upright arm 10a pushes the hanging extension 3f of the spring jack 3 that comes into contact with the inward arm 10a.

When the horizontal arm 10b is rotated downward, the arc-shaped protrusion 10c
Is inserted between the backs of the tops of the locking jacks 13 and 14 to be described later and the bottom of the groove of the large cylinder 9, and when the jack is turned upward against the elastic force of the spring jack 3, The locking jacks 13 and 14 are pulled out from the back and come into contact with the tops thereof.

The arcuate portion 10e is in contact with protection means 12 for preventing the two-arm lever 10 from moving upward.

As shown in FIG. 3, the canceling cam 11 comprises an inwardly protruding projection 11a and a slightly longer arc-shaped portion (appears to be almost straight in the drawing) 11b, and the projection 11a is a short straight portion. 11c and an inclined portion 11d.

Protecting means for canceling cam 11 and double arm lever 10
12 is attached to the upper cam ring 8. The protection means 12 can be attached to the canceling cam 11 without being attached to the upper cam ring 8.

Two types of locking jacks 13, 14 are accommodated in the groove of the large cylinder 9 corresponding to the two-arm lever 10.
It is.

The difference between the locking jacks 13 and 14 is that they separately have armatures having different heights described later.

The locking jacks 13, 14 do not move up and down,
So that it can swing in the radial direction of the large cylinder 9,
It can move freely around the center.

The large cylinder 9 is arranged coaxially with the small cylinder 1, but its diameter is larger than the cylinder 1. For example, large cylinder 9 is 28G (gauge)
In this case, the small cylinder 1 corresponds to a 32G knitting machine in the case of a single cylinder. As a result, by combining these large and small cylinders, it becomes possible to manufacture an electronic pattern knitting machine of 32 G or more, which was impossible with the prior art.

Two control electromagnets 15 and 16 are stacked vertically around the large cylinder 9 and attached to the second cam holder 17 so as to face the locking jacks 13 and 14. These control electromagnets 15 and 16 have the same structure as the invention of Japanese Patent Publication No. 53-1865 of the present applicant.

The second cam holder 17 is mounted on the lower cam ring 21.

Below the cylinder 9, there is a drive gear 22 integrally mounted, which rotates at the same speed as the large and small cylinders 1, 9 when driven from a drive source usually arranged in the machine. . On the lower cam ring 21, there are supports 23 arranged at equal intervals to fix the upper cam ring 8.

As described above, the locking jacks 13 and 14 separately have the high armature 13a and the low armature 14a having different heights, and include the following portions.

Extension parts 13c and 14c which are engaged with the alignment cam 18 and pushed into the large cylinder 9 are provided at the lower end part;
Having the top portions 13d, 14d that come into contact with the horizontal arm 10b of the two-arm lever 10, having the lowering bats 13e, 14e that can swing around the bulging portions 13b, 14b, and the upper permanent magnet described later That is, it has upper outer edges 13f and 14f that are magnetically attracted.

The aligning cam 18 has an inwardly inclined portion 18a as shown in FIG.
And a straight portion 18b and an outwardly inclined portion 18c.

As shown in FIG. 5, the two control electromagnets 15 and 16 have two magnetic pole surfaces 15a and 16a arranged on a vertical line, respectively. Each armature 13a, 1 facing these magnetic pole surfaces 15a, 16a
4a makes surface contact. The coils of the control electromagnets 15 and 16 are connected to a current source that supplies a pulse current according to a program recorded in advance. An upper permanent magnet 19 and a lower permanent magnet 20 are disposed above and below the control electromagnets 15 and 16.

The upper outer edges 13f and 14f of the locking jack are magnetically attracted to the upper permanent magnet 19, and the extensions 13c and 14c are magnetically attracted to the lower permanent magnet 20.

The upper permanent magnet 19 has pole pieces 19a and 19b, and each has a notch 19c at the center of the pole face for weakening the magnetic force.

As shown in FIG. 4, the lower permanent magnet 20 is disposed immediately below the aligning cam 18 and has two permanent magnets 20a and 20b having working surfaces of substantially the same shape as the aligning cam 18. At the center of the permanent magnets 20a and 20b, for example, a notch 20c for weakening the magnetic force is provided. The notch 20c and the notch 19c of the upper permanent magnet 19 are on the same vertical line.

As shown in FIG. 2b, the control electromagnet having the above-described configuration, when no pulse current is input to the first control electromagnet 15 and the second control electromagnet 16 in the first needle selecting device A (during normal rotation), It works as follows.

When the rotary cylinders 1, 9 rotate in the direction of the arrow in FIG. 2b, the locking jacks 13, 14
With f and 14f securely held by the permanent magnet 19,
The lowering bats 13e and 14e are guided to move laterally on the guide path 21. On the other hand, the spring jack 3 is at the lowest position, and the selection butt 3d at the lower end thereof is engaged with the selection cam.

Furthermore, when the locking jacks 13 and 14 shift, the fourth
The locking jacks 13 and 14 swing about the bulging portions 13b and 14b along the inclined surface 18a of the alignment cam 18 shown in the figure, whereby the upper end outer edge portions 13f and 14f rotate outward of the cylinder, The lower ends 13c and 14c are gradually pushed into the groove of the large cylinder 9.

When the locking jacks 13 and 14 further shift, the magnetic force of the permanent magnet 20 is applied, and the lower ends 13c and 14c are magnetically attracted.
The balance of the locking jacks 13 and 14 is further maintained. Then, when reaching the linear portion 18b, the lower end portions 13c, 14c
Is pushed into the deepest part of the cylinder groove.

Immediately after the extension portions 13c and 14c of the locking jacks 13 and 14 are pushed into the deepest portion of the groove of the large cylinder 9, the locking jacks 13 and 14 reach the first needle selection position A on the vertical line of the notches 19c and 20c, and The magnetic force of both permanent magnets 19 and 20 is notch 1
The upper outer edges 13f, 14f are attracted and held only by the pole piece 19b as shown in FIG. 5, and at the position of the notch 20c of the lower permanent magnet 20, the extensions 13c, 14c are temporarily From magnetic attraction. At this point, the high armature 13a and the low armature 14a facing the first control electromagnet 15 and the second control electromagnet 16 move in the lateral direction without being affected by the first control electromagnet 15 and the second control electromagnet 16. Moving.

Locking jacks 13 and 14 are cutout grooves 1 at the first needle selection position A.
After passing through 9c and 20c, the horizontal arm 10b is rotated upward as the vertical arm 10a of the two-arm lever 10 is pressed inward by the projection 11a of the canceling cam 11.

Due to the rotation of the horizontal arm 10b, the arc-shaped projection 10c is removed from the state of being inserted into the back surface of the top of the locking jacks 13 and 14, and comes into contact with the tops of the locking jacks 13 and 14. The selection butt 3d is temporarily disengaged from the engagement of the selection cam 6.

When the locking jacks 13 and 14 pass through the straight portion 11a of the canceling cam 11, the arcuate protrusion 10c is immediately inserted into the back surface of the top of the locking jacks 13 and 14 by the elastic force of the spring jack by the rotation of the horizontal arm 10b. . At this time, the selection butt 3d is again engaged with the selection cam 6, and the spring jack 3 is raised. As a result, the knitting needle is raised from the state shown in FIG. 6 to the tack position or the knit position as shown in FIG.

Further, when the locking jacks 13, 14 reach the second needle selection position B with the rotation of the cylinders 1, 9, when the first control electromagnet 15 and the second control electromagnet 16 are non-conductive, the high armature 13
a or the low armature 14a is not affected by the first control electromagnet 15 and the second control electromagnet 16, and as a result, the knitting needle further moves up to the knitting position as shown in FIG.

The locking jacks 13 and 14 are the second notches 19c and 20c.
When one of the first control electromagnet 15 and the second control electromagnet 16 is energized at the needle selection position B, the magnetic pole face 15a or 16a overcomes the attraction force of the magnetic pole face 19A and the high armature 13a of the locking jacks 13, 14 Alternatively, the low armature 14a is magnetically attracted. As a result, the extending portions 13c and 14c of the locking jacks 13 and 14 are pulled out, and the upper ends thereof are pushed into the large cylinder 9 grooves. After passing through the second needle selection position B, the hanging extension 3f of the spring jack 3 is pushed into the cylinder together with the vertical arm 10a of the two-arm lever 10.

Along with this, the horizontal arm 10b is pivoted upward, and its arc-shaped projection 10c separates from the back surface of the locking jacks 13, 14 and abuts on the tops of the locking jacks 13, 14. Therefore, in the spring jack 3 in which the hanging extension 3f is pushed into the cylinder, the selection butt 3d is disengaged from the selection cam 6 and passes through the entire surface of the selection cam 6.

As a result, the spring jack 3 moves in the horizontal direction in that state, and the knitting needle does not move up further as shown in FIG. After that, Spring Jack 3 is selected bat
After the 3d is reengaged with the selection cam by the elastic force of the spring jack 3, it is lowered by the downward inclined portion 7a of the down cam 7. On the other hand, the knitting needle 2 is also guided to the lowest point by the stitch cam 5a.

Furthermore, with the rotation of cylinders 1 and 9, the next needle selection position,
That is, at the first needle selection position A of the notch grooves 19c and 20c,
When one of the first control electromagnet 15 and the second control electromagnet 16 is energized, the magnetic pole surface 15a or 16a overcomes the attractive force of the magnetic pole surface 19A and magnetically attracts the high armature 13a or the low armature 14a. This makes the locking jacks 13,14
The extension portions 13c and 14c of the large cylinder 9 are pulled out, and the upper end thereof is pushed into the inside of the large cylinder 9 groove.

After passing the first needle selection position A, the vertical arm of the two-arm lever 10
Along with 10a, the hanging extension 3f of the spring jack 3 is also pushed into the cylinder by the canceling cam 11.
Along with this, the horizontal arm 10b is pivoted upward, and its arc-shaped projection 10c separates from the back surface of the locking jacks 13, 14 and abuts on the tops of the locking jacks 13, 14. Therefore, the selection butt 3d of the spring jack 3 whose hanging extension 3f is pushed into the cylinder is disengaged from the selection cam 6 and passes through the front surface of the selection cam 6. As a result,
The spring jack 3 moves sideways in that state,
As shown in the figure, the knitting needle does not move up any further and is at the welt position. Thereafter, both the spring jack 3 and the knitting needle 2 move in the horizontal direction in that state.

[Effects of the Invention] According to the present invention, a two-arm lever is provided between a spring jack and a locking jack, and furthermore, the locking jack is caused to perform only rocking movement in the cylinder radial direction, so that the locking jack is raised and lowered. No knitting, tacking, and welting with two yarn feeders without the need for a cam
The distance between the needle selection positions can be reduced as compared with the conventional device for selecting the positions. Therefore, knit at one yarn feeder,
Tack and welt can be selected from three positions, and the number of yarn feeders can be increased.

Further, since the rocking jack only swings in the radial direction of the cylinder, the rocking jack withstands long-term use and has a significantly increased service life.

[Brief description of the drawings]

The accompanying drawings show an embodiment of the present invention. Fig. 1 is a longitudinal sectional view showing a main part of the knitting part. Figs. 2a and 2b are knitting needles, spring jacks, two-arm levers, locking jacks (Fig. 2a), cams, electromagnets (Fig. 2b). FIG. FIG. 3 is a plan view of the canceling cam. FIG. 4 is a side sectional view showing the relationship between the alignment cam and the lower permanent magnet. FIG. 5 is a side sectional view showing a relationship among a locking jack, a control electromagnet, and upper and lower permanent magnets. 6 to 10 are longitudinal sectional views showing the main parts of the knitting for explaining the operation. 1 ... Small cylinder 2 ... Knitting needle 3 ... Spring jack 5 ... Control cam 6 ... Selection cam 9 ... Large cylinder 10 ... Double arm lever 11 ... Canceling cam 13,14 ... Locking jack 15, 16… Control electromagnet 19,20 …… Permanent magnet

Claims (4)

(57) [Claims] A large and small rotary cylinder (9,1) coaxially arranged, a knitting needle (2) housed in a groove of a small cylinder (1), and a control cam for controlling the knitting needle (2). (5), an elastic spring jack (3) provided immediately below the knitting needle (2), and a selection cam (6) for engaging and disengaging the spring jack (3); and a groove in the large cylinder (9). Two types of locking jacks (13, 14) having different heights of armatures (13a, 14a) accommodated and oscillating in the radial direction, and a vertical position with respect to the armatures (13a, 14a). The two sets of control electromagnets (1
(16), (15, 16), and an upper permanent magnet (19) disposed opposite to the upper part of the locking jack (13, 14) to fix the position of the locking jack (13, 14). And a lower permanent magnet (20) disposed opposite to the lower part of the locking jack (13, 14) to balance the magnetic force with respect to the locking jack (13, 14); A two-arm lever (10) arranged and linked between the spring jack (3) and the locking jack (13, 14), and a canceling mechanism for pressing one arm of the two-arm lever (10) inward. Either a cam (11) or a welt for disengaging the lower part of the spring jack (3) from the engagement of the selection cam (6) is selected, or the lower part of the spring jack (3) is engaged with the selection cam (6). To make a transition to tack / knit in advance An electromagnetic needle selection device for a circular knitting machine, comprising: a first needle selection means; and a second needle selection means for disengaging a lower portion of a spring jack (3) with a selection cam (6) to select the latter tack / knit. 2. The device according to claim 1, wherein the lever ratio of one arm (10a) to the other arm (10b) of the two-arm lever (10) is 1: 1 to 1: 2. 3. Apparatus according to claim 1, wherein the two-arm lever is L-shaped. 4. The apparatus according to claim 1, wherein needle selection of 32 gauge or more is possible in the small cylinder (1).