DE1233528B - Device for the production of socks of the same length on circular knitting machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

D 04 b

German KL: 25 a - 9/02

Number: 1233 528

File number: N 21459 VII a / 25 a

Filing date: April 16, 1962

Opened on: February 2, 1967

The invention relates to a device for producing stockings of the same length on circular knitting machines, through which the withdrawn length of goods can be scanned and the needle cylinder in the event of deviations can be raised and lowered from the nominal value to change the mesh size.

With conventional stocking knitting processes, it is theoretically possible to adjust the length of the knitted hosiery to keep within the desired limits, considering the number of courses and the Brings mesh size in a fixed ratio to each other. In practice, however, this cannot be achieved since it is not possible to keep the mesh size constant precisely enough. This depends the tension of the fed thread, the knocking off of the thread by the sinker and the latch needle and pulling off the thread through the lock parts over the sinker.

The first two of the points mentioned are not completely controllable. However, the last one can be influenced, in which with the help of the regulating screw the vertical movement of the needle cylinder of the knitting machine is set so that this process is kept constant. But the one-time adjustment of the regulating screw is not enough to adjust the length of the stocking keep constant.

Attempts have already been made to eliminate the difficulties present here by Changes in the mesh size detected via a mechanical device that uses switching contacts Use of an electric motor that lifts or lowers the needle cylinder. at a known device, this is done by a sensing device, which the rotating plates scans and has a contact finger pivotable between two contacts. This will be a by changing the mesh size, the change in the radial position of the radially inwardly prestressed Sinkers depending on the direction of sinker movement inwards or outwards against you of the two contacts swiveled. In doing so, it closes one of two circuits in which the reversible, the raising or lowering of the needle cylinder is located.

In another known device, a clamping device is attached to the beginning of the stocking, which pulls the stocking down with its entire weight and ensures uniform tension. A rope is attached to this clamping device, which runs to a drum on which it winds up when the clamping device descends and this therefore depends on the effective device for producing stockings
same length on circular knitting machines

Applicant:

Nagata Seiki Company Ltd., Tokyo

Representative:

Dr. M. Owl and Dr. W. Berg, patent attorneys,

Munich 2, Hilblestr. 20th

Named as inventor:
Renpei Abe, Nigata-ken;
Takehiko Hayashi, Tokyo (Japan)

Claimed priority:
Japan April 15, 1961 (13 381),
dated June 12, 1961 (20 281)

Knitting feed rotates. In normal operation this drum rotates at the same speed as depending on the working rhythm of the knitting machine according to the target mesh size Drum. If the mesh size changes and thus the sinking speed of the clamping device, so there is a relative rotation of the two drums. This actuates a switch that activates the use a reversible electric motor for raising and lowering the needle cylinder.

These control devices have a mechanically extremely complicated structure and are thus expensive to manufacture and very prone to failure. Another shortcoming is that they need relatively large deviations from the nominal size, to address. In too many places on the mechanically coupled individual parts of the control devices is the possibility of one of the same magnitude as the expected deviations Given game that excludes response of these control devices.

The invention has set itself the task of a To create a device of the type outlined above, through which stockings of the same length by Regem the mesh size can be produced and which are characterized by high control accuracy and simple structure excels.

■ It solves this task with one each in the goods withdrawal area at the top, and at the bottom

709 507/25

3 4

Tolerance limit arranged, with light beam depending on the control effected according to the invention

tende, photoelectric device and superimposed by one.

electromagnetic lifting device. Inside the needle cylinder 1 you can both

Such a device, of course, on the slide down of the stocking in made of organic

Way of the downward growing stocking tube 5 glass existing suction cylinder 9 as well as the

can be provided several times in order to follow any Kofrek stocking knitting process. The stocking will

Doors of the mesh size over the length of the stocking by means of an air suction device in the suction cylinder 9

distribute, can be stretched down and withdrawn as part of the practical requirements,

nisse work as precisely as you like, since the two outer wall of the suction cylinder 9 are located

Can put light rays very close together. Io two in pairs, in opposite directions

A preferred embodiment of the invention applied to photoelectric devices,

is characterized by the fact that the photoelectric which are the light sources 10, 11 and the photocells 12,

Devices on a driven by a pinion 13 contained in the carriers 14, 15 and their loading

planar slewing ring are arranged, which can be rotated pull line (display point 16) parallel to the ent-

is mounted on a lifting cylinder, on which one with 15 speaking lines of the photoelectric device

A rack in engagement with a pinion runs between them.

is seen. This causes irregularities in the circuit ·· of the light sources used

detected immediately. Lamps 10, 11 is located, a switch 17, which is used for the purpose of

To switch on the photoelectric device, the lighting time of the lamps 10, 11 depends on the switching advantageously controlled a rotating switching cam in the 20 cam 18 or a similar device Light source circuit. which is connected to the drive of the knitting machine in

The suction cylinder is advantageously transparent because it is connected. The switching cam 18 is number

with the photoelectric device outside the same row of stitches for knitting the fabric

ben can be arranged what an internal synchronization to, more precisely, the lamps then

Order is preferable. 25 to light up when the beginning of the gesture

Below are based on the drawing, each one kes should have reached the reference point 16. The photo simpler and one more perfect execution cells 12, 13 are connected to an electrical device 19 Described approximately form of the invention. It shows connected, which an amplifier and a re-

F i g. 1 has a schematic, partially sectioned lais. The latter controls a couple side by side

Representation of the device according to the invention, 30 arranged and independently working electrical

Fig. 2 is a longitudinal section through parts of a further magnet 20,21. The electrical device9 is like this

Perfected device according to the invention designed that the lamp 10 and the photocell

dung, 12 comprehensive photoelectric device, which

F i g. 3 is a section along the line III-III from above the reference point 16, incident

F i g. 2, 35 light corresponding to this photoelectric device

Fig. 4 is a side view of the setting device can operate relays circuit. This re-

for the regulating screw and relay circuit then actuates the electromagnet 20,

F i g. 5 shows a view from the right of the upper part when the photocell 12 is above the reference point 16

from F i g. 4. and the photocell 13 below the reference point 16

In the construction according to FIG. 1, the front 40 receives light. In this case, the electro-jump 2 of the vertically displaceable needle cylinder 1 magnet 20 is actuated until the upper photoelectric hosiery knitting machine on the support screw 4 no longer receives light,
at 3 'at the end of the arm 3 of the best the distance between the EIe axis 8 rotatably mounted regulating lever attached to the two photoelectric devices is so, at the extreme end of a fixed with him 45 less than kept possible. It is recommended that the bound lever arm 5 is seated. The regulating lamps are to be shielded in these so that the light screw 6 bundled with them is embedded, the tip of which is kept on the nok rays.

ken 7 runs to control the number of stitches as well as the The regulating screw 6 for the vertical adjustment

Number of courses. ment of the needle cylinder 1 has two ratchet washers

The screwing up and down of these regulators 50 22 and 23 at their upper end, in order to do this in stages

screw 6 causes an up and down movement to ensure the up and down position of the screw.

Regulating arm and thus the up and down movement Either these are wheels that only go in one direction

of the needle cylinder 1. turn, i.e. either screw it open or screw it down;

The lifting of the needle cylinder 1 causes the or there are ratchets such as 22 and 23, which through

increased drawing in of the thread by the latch needle 55 pawls 24 and 25 are actuated, which in turn

over the board, which thus a larger mesh can be operated by the electromagnets 20 and 21,

size while the lowering of the needle is now the beginning of a while knitting

cylinder 1 a smaller mesh size causes knitted stocking in the suction cylinder 9 for reference

The stocking will arrive in the order lengths, point 16 or to line A if the lights are on

Heel, foot and toe knitted; If you use the 60 10,11 to light up, this indicates that the

adjust the entire length of the stocking by ensuring that the knitting process is flawless. In this case

the number of meshes for the length section - light only falls on the lower photocell 13. The elec-

longest part of the whole stocking - adjusts. The solenoids 20 and 21 are not operated. Is the

Control cam 7 is used to shorten the length of the knitted stocking, depending on requirements, so that the

To regulate mesh size. The tip of the regulating 65 catches the stocking on or above the line B

If screw 6 slides during the knitting process, light falls on the upper photocell 12. Here-

the higher part to the indentation of the cam. by the solenoid 20 is actuated, and the

The regulation effected by the cam is un- adjusting screw 6 is in the sense of a larger one

Claims (4)

Mesh size delivered, d. that is, the needle cylinder 1 is raised. If the length of the knitted stocking is too great, so that the beginning of the stocking is on or below the line C, no more light can fall on the lower photocell 13. In this case, the electromagnet 21 is actuated, and the adjusting screw 6 is advanced in the sense of an increase in the number of stitches, i. That is, the mesh size is reduced, for which purpose the working cylinder is lowered. The reference line, which is shown only once here to simplify the description of the invention, can very well be used more often, namely to distribute changes in the numerical mesh size over a larger area, and thus leads to the production of finished products of uniformly excellent quality. Since the attachment of several reference lines is only possible under certain conditions, the following form of the invention has been developed in which the control device for the desired mesh size moves along with the knitted stocking. In this form of the invention, the monitoring device performs both a peripheral circling and an up and down movement to control both the circumference of the knitted fabric and the length of the knitted fabric. The supports 14, 15 for the photoelectric devices with the light sources 10, 11 and the photocells 12, 13 are replaced by the supports 26 and 27. Here, too, the reference line 16 lies in the middle, parallel to the two lines that are formed from the respective light sources 10, 11 and the associated photocells 12, 13. The carriers 26, 27 sit on a movable lifting cylinder 28 which is moved up and down by a device not shown here. The movable lift cylinder 28 moves in the knitting direction according to the predetermined number of courses and the prescribed length. The lifting cylinder 28 is driven by the drive pinion 30, which is driven in accordance with the number of rows of stitches, via a rack 29 attached to the lifting cylinder 28. However, other drive means can also be used. The carriers 26, 27 sit on the ring gear 31 coaxially fastened and rotate with it on the movable lifting cylinder 28. Said toothed circle 31 circles around the beginning of the knitted stocking and is rotated by the drive pinion 32, the tooth width of which corresponds to the vertical movement length of the lifting cylinder 28, to monitor irregularities in the ratio of length and circumference of the knitted stocking during the knitting process. Thus, the photoelectric device rotates and follows the knitted stocking in a spiral path in the knitting direction. The slope of the spiral will depend on the manufactured goods; with a fine-meshed fabric, the spiral becomes tighter. Normally, the photoelectric device is constantly in operation during the knitting process for the lengths of the stocking in order to monitor irregularities in the prescribed length. The lighting of the light source can also be synchronized with the help of a special switching cam, namely the number of rows of stitches or, more precisely, synchronized with the point in time at which the beginning of the knitted hosiery should enter the reference line mentioned. In this way, this monitoring process can be carried out at various points. With this invention it is possible to distribute numerically different mesh sizes uniformly over the entire length of the knitted fabric and, if necessary, to control differences both in circumference and in length. Goods produced in this way have uniform lengths and uniform mesh sizes. Patent claims: 1. Device for the production of stockings of the same length on circular knitting machines. which can be scanned for the drawn length of the goods and the needle cylinder lifts and changes the mesh size in the event of deviations from the nominal value can be lowered, characterized by one each in the goods reference area at the top and at Photoelectric device (10, 12 and 11, 13) and by an electromagnetic lifting device (21 to 25). 2. Device according to claim 1, characterized in that the photoelectric devices (10, 12 and 11, 13) are arranged on a turntable (31) driven by a pinion (32) are, which is rotatably mounted on a lifting cylinder (28) on which one with a Pinion (30) engaged rack (29) is provided. 3. Device according to claim 1 or 2, characterized by a rotating switching cam (18) in the circuit of the light sources (10,11). 4. Device according to one of claims 1 to 3, characterized by a transparent Suction cylinder (9). Considered publications:
German Auslegeschrift No. 1,062,877;
U.S. Patent No. 2,839,907. 1 sheet of drawings 709 507/25 1.67 © Bundesdruckerei Berlin