JPS60468B2 - Method and device for transferring knitting loops between cylinders of a double silunda knitting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double cylinder knitting machine and its operation;
More particularly, the present invention relates to a method and apparatus for transferring knitted fabric from one cylinder to another of a double cylinder wire machine.

As is well known, flat, regular or knitted stitches are formed on the needles of the lower cylinder in double shilling knitting machines;
Purl stitches, on the other hand, are formed on the needles of the upper cylinder.

In rib knitting and when plain stitches and purl stitches are combined in knitting, the knitting is carried out selectively and alternately on the upper and lower cylinders, thus changing from plain stitches to purl stitches and vice versa. It is also well known that this requires transferring the stitches held on the needles from one cylinder to another. Conventionally,
The transfer of stitches in double cylinder knitting machines was carried out by means of a double hook needle which held the stitch or knitting loop and transferred itself from one cylinder to another.

The advantage of this conventional transfer is that the actual transfer of stitches from one hook to another poses fewer problems. However, the need to transfer the needles from one cylinder to another requires complex mechanical systems and is associated with cutting and bending problems, and the required amplitude of the lateral movement of the double-hook needles. As a result, the speed of operation must be considerably limited. Another prior art arrangement uses a specially formed single stitch needle to transfer the stitches - with overlapping hooks to transfer stitches from the needles of one cylinder to the hooks of adjacent needles of other cylinders. This allows the opposing needles to slide side by side.

However, ``this configuration requires a special needle with a head or hook that is slightly offset from the shank or reduced in thickness to half. The tight tolerances clearly affect the manufacturing costs of the machine, which must be fairly rigid and heavy to minimize such vibrations. or a method and apparatus for transferring stitches, in which a common single hook needle is used within its normal axial movement amplitude and within the normal accuracy range of the needle, movement and machine. The method and apparatus described above are inherently free from the problems described above.The present invention is a double cylinder rope machine operable to selectively knit plain stitches and purl stitches, which comprises a single hook knitting needle. are arranged in both cylinders to reciprocate in the direction of the ball during knitting operations, aligning the upper cylinder needle with the lower cylinder needle to form a pair, and acting on the needle to displace the needle radially outward from its cylinder. means for positioning the hook of the displaced needle so that it enters the knitting loop initially carried by the displaced needle, and for receiving the loop from the displaced needle to another needle at the time of seeding the loop and transferring the loop. It was established.

Preferably, the displacement means includes an element carried on the cylinder for displacement engagement with the needle to act on and tilt the needle, positioning its hook radially outwardly from the cylinder, causing it to bend, and for causing displacement of the needle. a cam that is engageable with the displacement element to manipulate the displacement element to perform the operation;

In a preferred embodiment of the invention, the displacement element is in the form of a pin extending radially through the cylinder wall, and the cam is formed by a stationary ring mounted inside the cylinder wall in aligned engagement with the inner end of the pin. be done.

In the method of the invention, a knitting loop formed on a single hook needle carried on a cylinder of a double cylinder circular knitting machine is transferred between the cylinder and an opposing single hook needle. To transfer the loop, the needle carrying the loop was displaced radially outward from its cylinder, and the opposing needles were slid relative to each other to displace the hook of the opposing needle carried by the other of the cylinders. The loops located radially inward of the hook of the needle and carried by another cylinder are penetrated to transfer the knitting loop from the displaced needle to the opposing needle. Figures la-f illustrate a double-cylinder circular knitting machine operable to selectively knit plain stitches and purl stitches, for example from a single-hook knitting needle 10 arranged or carried in the lower cylinder 11 to the upper cylinder 13. 1 shows the characteristic steps of the method of the preferred embodiment of the present invention for transferring knitting loops or stitches to a single-hook knitting needle 12;

In FIG. 1a, two needles 10, 12, each from each cylinder, forming a typical matched pair of opposing needles, are in a standby or rest position and their respective latches 14, 16 are open. The knitted fabric falling inside the cylinder (represented here by a series of loops)
The last loop or stitch S of is held by its hook 18, while the hook 20 of the upper needle 12 is empty. The first actual step of the transfer method according to the invention
In figure b, the lower needle 1 has been displaced and tilted as shown, its hook 18 being perpendicular to the rut line of the needle stem and positioned radially towards the outside of the cylinder 11. are doing. In this slightly inclined position, the needle stretches and opens the knitting loop or stitch S initially carried or engaged by the neck 22 of the hook 18.
let In FIG. lc, the needle 12 is lowered by relative sliding until its hook 20 is inserted radially inwardly into the now open loop hook 18 carrying the needle 101, while the displaced needle 10 Remain in the obscene position. At this time, the displaced needle 1 has to escape from the stitch S looped around the neck 24 of the hook 20 of the opposing upper needle 12, which was positioned to accommodate the loop S when the needle 1 was released from the needle 1. No. To do this, the needle 10, still slightly inclined, is raised until its latch 14 clears the open loop S, as shown in FIG. As a result, as shown in FIG. 1E, in the next step, the needle 1 can be lowered and removed from the stitch S, that is, the stitch S can be shed. This is because the stitch S itself causes the latch 14 to close on the hook 18. lf, when the withdrawal is completed and the needle 10 moves below the needle 12, the needle 10 is returned to its normal non-tilted position.The needle 10 then becomes idle but the needle 12 is now As it is shed, it receives a stitch S and retains the shed and transferred stitch S, ready to form a purl stitch in the usual manner known in the art.As can be seen, a similar sequence occurs and the stitch is transferred from the upper direction to the lower direction.

In describing this method, each action of the needle has been noted without specifying the means or mechanism by which these actions are achieved. As for the longitudinal or crosswise movements of the needle, it should be noted that these movements are perfectly normal and that any device used to form loops or stitches in the needles of the cylinders of machines generally known It is enough to point out what can be done. Note that such devices will not be described because they do not form part of the present invention. The means for acting on the needle to displace it radially outwardly from the cylinder and create a tilting movement of the needle will be explained later in the description of FIGS. 2 and 3. The needles themselves are of a conventional type, and the needles of a single-cylinder circular knitting machine can be used satisfactorily. A preferred embodiment of the apparatus for obtaining the desired degree of tilting displacement of the needles 10, 12 and at the appropriate timing is shown in FIGS. 2, 3, and 4.

FIG. 2 shows a schematic sectional view of the lower cylinder 1 of a circular knitting machine, and also shows the slot 30 in which the needles 10 are disposed, movably held by conventional garter springs 44. Figure 4). The element formed by the miniature pin 32 has a radial hole 34 extending through the wall of the cylinder.
Slide inside. For each needle, there is one hole 34 and one pin 32 extending therethrough. One end of each pin 32 carried by the cylinder 11 in each hole 34 abuts and is in displacement engagement with the stem 36 of the needle 10 (FIG. 4), and the other end extends inwardly beyond the inner wall of the cylinder 11. protrude to An obliquely fixed cam track 38 containing a stationary ring cam is in mating alignment with the pin 32 and engages the inwardly projecting end of the pin 32 to keep all of the pins 32 in position during rotation of the cylinder 11. 1, and the needle 10 is displaced and tilted at the stage shown in FIG.
FIG. 3 is similar to FIG. 2 except that it shows the upper cylinder 13, with the cam circuit 42 generally oriented out of rotational phase with the cam circuit 38 of the lower cylinder. Details of the pin 32, which engages either the lower needle 10 or the upper needle 12 as a radial pusher and are opposed to the cam rings 38, 42, are shown in FIG.

FIG. 4 is a partial vertical cross-sectional view taken corresponding to the heads of two opposed needles. Pin 32 has a shoulder 46 that engages a retaining garter spring 48. In this preferred embodiment, a radially outward displacement force is applied to the needle stem 36 approximately midway between the needle hooks 18, 20 and the garter spring 44. By applying pressure close to the garter spring 44, movement of the pin 32 can be reduced, but greater precision is required since the movement is amplified at the needle hook. The stem 36 of the needle 10 shown in FIG. 4 is slightly displaced from the base 53 of the slot 30 towards the tilted position and is slightly bent by the means for displacing it, as the needle 10 is not in the slot. This can be understood by considering that it is supported on the base 53 using the butt 64 as a fulcrum, and that the load from the garter spring 44 is overcome by the tilting force from the pin 32. For bending, use needles 10 and 12 and garter spring 4.
4 occurs between the butt 64 and the pin 32, acting to return the pin 32. The stationary upper and lower guide and support members (generally indicated at 50, 52 in FIG. 4) are common parts of double cylinder circular stripers and are members 50, 52.
It guides and supports both the upper and lower cylinders 3, 11 surrounding the cylinder 52.

Upper and lower guide surfaces 54, 56 are provided on members 50, 52 to guide the knitted fabric away from the needles, and conventional sinkers 5 are provided to control the stitches during knitting and transport.
8 is provided, and the sinker is provided with 1 shilling by both upper and lower sinker cam tracks 60, 62 attached to members 50, 52.
1 and 13 and are suitably moved and positioned in the radial direction. The butt 64 of the needles 12, 10 is the cylinder 3
. During each rotation of the cylinders 11, 13, all of the needles 10, 12 are displaced to the buccal oblique position, whether or not they are manipulated axially to effect the transfer, and the needles that are manipulated axially and radially Transport occurs only from

, the method and device of the present invention differs from the conventional transfer method and device mentioned at the outset, and uses a knitting technique and a double
Gives a new direction to the design of cylinder knitting machines.

The new idea is to insert the receiving needle hook directly and freely into the stitch or loop to be transferred, while ensuring that the loop is held extended and open by the other needle. The other needle makes a slight radial movement during this release phase to displace the needle by a few millimeters without colliding with other needles and without requiring tight tolerances. is sufficient to insert into the stitch. Radial movement can be easily achieved by bending or bending the needle, which is imposed on the needle because of its small nature, its spring nature, and the properties imparted to the steel typically used to make the needle. This is because the load is imposed an unlimited number of times and for an unlimited period of time. Due to the conceptual or kinematic simplicity of the movements, the removal of precision requirements, and the much shorter movements, the invention makes the manufacture of double shilling knitting machines much simpler and lighter. can.

This makes the manufacturing cost of the machine very low and also increases manufacturing efficiency and productivity. The present invention, in its nature,
Also, in view of the various constructional details of knitting machines to which the invention may be applied, it is possible to use it in other than the specific preferred embodiments described in detail herein and shown in the drawings.

[Brief explanation of the drawing]

1 is a schematic diagram showing a series of movements of a pair of knitting needles according to a preferred embodiment of the present invention; FIG. 2 is a diagram taken along line 2-2 of FIG. 4 below the preferred embodiment of the present invention; FIG. 3 is a horizontal partial cross-sectional view of the upper cylinder similar to FIG. 2; FIG. 4 is a horizontal partial cross-sectional view of the cylinder and related elements;
14 is a vertical partial cross-sectional view of the needle and associated elements of the present invention taken along line 14; FIG. In the figure, 10, 12 are single-hook knitting needles, 1 1,
13 is a cylinder, 14 and 16 are latches, 30 is a slot, 32 is a pin, 38 and 42 are cam circuits, and 44 and 48 are girders. Nezu Shio Z diagram ★ 3 diagrams 4 diagrams

Claims (1)

[Scope of Claims] 1. In a double-cylinder knitting machine of the type that can be operated to selectively knit flat stitches and purl stitches, single-hook knitting needles are arranged in both cylinders so as to reciprocate in the axial direction during the knitting operation. and the needles of one cylinder are aligned with the needles of the other cylinder to form a pair, acting on said needles to displace the needles radially outwardly from their cylinders and displacing the hooks of the other needles of the needle pair. radially inwardly of the hook of the displaced needle to penetrate into the knitted loop originally carried by the displaced needle and to receive said loop from the displaced needle onto said other needle when said loop is tied; A double double
cylinder knitting machine. 2. A double cylinder knitting machine according to claim 1, wherein said means act to tilt said needles so as to position their hooks radially outward from the cylinder. 3. A double cylinder knitting machine according to claim 2, characterized in that said means bends said needles when displacing said needles to said inclined outward position. 4. Double cylinder knitting machine according to claim 1, characterized in that said means comprises an element carried on said cylinder for displacing engagement with said needles. 5. A double cylinder knitting machine according to claim 4, characterized in that a cam is provided which is engageable with the element to operate the element to displace the needle. 6. Claims characterized in that the element is in the form of a pin extending radially through the wall of the cylinder, and the cam is located inside the cylinder wall to engage the inner end of the pin. A double cylinder knitting machine according to item 5. 7. The cam has a stationary ring mounted inside each cylinder in engagement alignment with the pin carried by the cylinder.
The double cylinder knitting machine according to claim 6, characterized in that it comprises a cam. 8 Opposite cylinder of cylinder of double cylinder knitting machine
In the method of transferring knitting loops between hook knitting needles, (
a) forming a loop of fabric on a needle carried in a cylinder;
(b) displacing a needle with a loop on one cylinder radially outwardly from said cylinder; and (c) sliding the opposed needles relative to each other so that the needles carried by the other of said cylinders are (d) positioning a hook radially of the hook of the displaced needle and causing the hook of the needle carried on the other cylinder to penetrate into the loop carried by the displaced needle; A method characterized by shedding knitting loops on said needles. 9. A method for transferring a knitting loop in a double cylinder knitting machine according to claim 8, wherein the displaced needle tilts the displaced needle to position its hook radially outward from the cylinder. A method characterized by: 10. A method for transferring knitting loops in a double cylinder knitting machine according to claim 9, characterized in that the displaced needles bend the displaced needles to the inclined outward position. .