DE1233532B - Device for the simultaneous stretching of a plurality of monofilaments made of synthetic material - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

DESIGN SCREEN

Int. α .:

DOId

German class: 29 a -6/31

Number: 1233 532

File number: T 21720 VII a / 29 a

Filing date: March 8, 1962

Opened on: February 2, 1967

The invention relates to an apparatus for the simultaneous stretching of a plurality of Each thread consisting of a single thread made of synthetic material with two groups of threads by friction transporting rollers, whereby the peripheral speeds of the individual rollers of each group are the same and those of the two groups are different.

The adhesive strength necessary to draw the threads the same on the roles of the individual role groups is in the known device generated by pressure rollers that press the thread against the driven counter roller, creating undesirable Changes in the cross-section of the thread arise.

In order to have a largely slip-free transport of the threads without use in each roller group To achieve the same damaging pressure rollers, according to the invention, the rollers of each group are on two concentric circles arranged, namely the larger diameter rollers on the circle, whose diameter is larger than the circle on which the rollers with the small diameter are arranged are, and all larger rollers directly from a gear and all small-diameter rollers can be driven directly by a gearwheel concentric to the first gearwheel, with in the thread running direction Alternate larger and smaller roles.

As a result, the large support necessary for the slip-free friction transport of the threads is also included Smallest space requirement and a simple drive for all rollers in each group.

In known stretching devices, all rollers have the same diameter and are in each group arranged along one or two straight lines, which makes drives complicated and expensive must be used if the number of rollers required for slip-free transport is provided should be.

An exemplary embodiment of the invention is shown in the drawing. It shows

F i g. 1 is an elevation of the stretching device according to the invention;

F i g. Fig. 2 is a cross-sectional view taken along the line II-II in Fig. 2. 1 represents.

In Fig. 1 and 2, role groups 1 and 2 are shown. These roller groups are mounted outside a housing 2 which is provided with a cap 3 and in which the drive gears of the rollers run in an oil bath. The wall 4 of the housing is provided with a central circular bore 5 in which a circular convex bearing flange 6 is mounted, the device in its center for the simultaneous stretching of a plurality of monofilaments made of synthetic
material

Applicant:

Alessandro Tonolo, Gallarate (Italy)

Representative:

Dr. K. H. Hille, lawyer,

Munich 15, Mittererstr. 3

Named as inventor:

Alessandro Tonolo, Gallarate (Italy)

Claimed priority:

Italy March 15, 1961 (4741)

has a hub 7. The bearing flange 6 is provided with mating surfaces which are fitted into the opening S.

The bearing flange 6 is attached to the wall 4. In the wall 4 four bores 13 are provided on a circle running concentrically to the bore 5 with flange bushings 10 which receive a bearing 11 in which a shaft 12 arranged perpendicular to the wall 4 is mounted. A gear 14 is keyed on the shaft 12. The hub 7 of the bearing flange 6 receives a flange bushing 15 into which a bearing 16 is inserted which carries a shaft 17 with a protruding end 18 on which a pulley 20 is wedged. The wall 19 has a bore 21 in which a flange bushing 22 is arranged which receives a bearing 23 in which the end 24 of the shaft 17 is mounted. The shaft 17 is mounted in this way perpendicular to the walls 4 and 19 of the housing. In between, a gear 25 is wedged on the shaft 17 with an outer ring gear which meshes with the gear 14 on the shaft 12. In the wall 19, four bores 26 are provided corresponding to the bores 13 in the wall, each bore receiving a bearing flange 27 with a bearing 28 which carries the shaft 12, which in this way runs perpendicular to the two walls. The end 29 of the shaft 12 protruding on the wall 19 carries a roller 30 of large diameter wedged thereon, which is set in rotation by the shaft 12.

709 507/319

Claims (1)

On the gear 25, a ring gear 31 with internal teeth is also attached, the diameter of which is smaller than the diameter of the outer ring gear on the gear 25. On the wall 19 there are further four bores 40 which are offset by 45 ° to the bores 26, a flange bushing 32, which carries two bearings 33 and 34, through which a shaft 35 is supported, which at one end 36 carries a gearwheel 37 which engages with the ring gear 31, is inserted into each bore. At the other end 38 of the shaft 35, a roller 39 of smaller diameter is keyed. In this way, as shown in Fig. 1, four large rollers 30 ^ 4, 305, 3OC and 3OD are provided, which are arranged symmetrically, and four small rollers 39 A, 39 B, 39 C and 39 D, which are symmetrical, however are mounted offset by 45 ° to the large rollers 30. The transmission ratio of the various gears is chosen so that all rollers have the same peripheral speed. The direction of rotation of the four large rollers is opposite to the direction of rotation of the four small rollers. The device according to the invention improves the adhesion for the drawing, since the thread F encompasses the large rollers 30 by more than half the circumference. The thread F enters roller group 1 and is passed successively over rollers 30 ^ 4, 39 A, 30B ₁ 39B, 3OC, 39C, 3OD, 39D and then over an additional roller 43 driven by meshing idler gears 41 and 42 is, the thread then exits from the roller group 1 and passes into one of these corresponding other roller group 2, in which, however, the rollers rotate at a multiple higher speed (depending on the material used 2 to 10 times higher speed). Therefore, a drawer of the thread F takes place between the roller groups 1 and 2. Claim: Simultaneous stretching device ίο a plurality of synthetic filaments Material with two groups of rollers transporting the threads by friction, whereby the peripheral speeds of the individual rollers in each group are the same and that of the two Different groups, characterized in that the rollers in each group are arranged on two concentric circles, namely the rollers (30) with a larger diameter on the circle, the diameter of which is larger is than the circle on which the rollers (39) are arranged with the smaller diameter, and all larger rollers (30) directly from a gear (25) and all rollers (39) with small Diameter can be driven directly by a gearwheel (37) which is concentric to the first gearwheel are, with larger and smaller roles alternating in the thread running direction. Considered publications:
German Patent Nos. 742 276, 541237; French patents No. 1206 096,
1188 501.903 821. 1 sheet of drawings 709507/319 1.67 © Bundesdruckerei Berlin