A DEVICE AT MACHINES FOR CONTINUOUS SEPARATION OF A STRIP FROM A HOSE-FORMED MATERIAL WEB

Abstract: A device at machines for continuous separation of at least one strip (49) from a hose-formed material web (14). The device (19) incorporates at least two lead rollers (16, 18) at least one (18) of which being tiltable relative to the other, thus that the end portion of the material web, which is thread on the guide rollers at rotation of the guide rollers, is imparted a continuous, axial feeding motion towards a severing device (50). The tiltable lead roller (18) is supported at one free end of an axially displaceable and in different displacement positions arrestable rod (20), the free end of which is pivotably to a limited extent on one hand about a shaft (31) mainly parallel with the rod and on the other hand about an axis (44) mainly perpendicular to the rod. This (20) is equipped with means (33, 43) for arresting its free end in different angular positions.

Description: A DEVICE AT MACHINES FOR CONTINUOUS SEPARATION OF A STRIP FROM HOSE-FORMED MATERIAL WEB The present invention refers to a device at machines fo continuous separation of a strip from a hose-formed material web whereby the device incorporates at least two lead rollers a least one of which is tiltable relative to the other, thus tha the end portion of the material web which is thread on the guid rollers at rotation of the guide rollers is imparted continuous, axial feeding motion towards a severing device. BACKGROUND OF THE INVENTION The initial material for production of above-mentioned strips i preferably a tubularly knitted, hose-formed knitted web, fro which is continuously severed one or more strips, whereby th knitted tube is rotated at the same time as it is fed axiall against a cutting member, which severs the strip in helical form The inner circumference of the knitted tube may vary from on tubular knitting machine to another, but it may also differ fro one manufacturer to another. It therefore is necessary to be abl to adapt the mutual position of the lead rollers to the inne circumference of the material hose, which has hitherto bee obtained in that the tiltable lead roller is suspended in a bal joint. With such a design it however is not possible to obtain position finding in a three-dimensional system of coordinates which means that the machine, at adjustment to a material web o a different diameter, must be completely re-aligned, which mean that one meter or more of the material web is used for the ver alignment not to mention a big waste of time. There is also know a rather complicated rod system, incorporating double rods in th X-Y coordinates, and a particular adjustment device for th adjustment of the lead roller or lead rollers in the Z coordinate. This known device is both complicated and expensiv to manufacture and it requires a big space. It is furthermor difficult to make the adjustments. PURPOSE AND MOST ESSENTIAL FEATURES OF THE INVENTION The purpose of the present invention is to provide a device o the type mentioned in the introductory part, which has a simpl design and therefore unexpensive to produce, which with som simple hand grips allows a change of the mutual position of th lead rollers for adjustment to the circumference of othe material webs. The device furthermore shall be designed thus tha it is easy to find an earlier determined X, Y and Z position thus that there is no unnecessary alignment work. These task have been solved in that the tiltable lead roller is supported a one free end of an axially displaceable and in different dis placement positions arrestable rod, that the free end of the ro is pivotable to a limited extent, on one hand about a shaf mainly parallel with the rod, and on the other hand about an axi mainly perpendicular to the rod, and that the rod is equippe with means for arresting its free end in different angula positions. DESCRIPTION OF THE DRAWINGS The invention hereinafter will be further described, wit reference to the drawings, which show an embodiment. Fig. 1 shows in perspective a machine for continuous separatio of a strip from a hose-formed material web, which machine i equipped with the device according to the invention. Fig. 2 shows also in perspective the device according to th invention, dismounted from the stand. Fig. 3 shows in bigger scale a side view of the front end of th device. Fig. 4 is a section along line IV-IV in Fig. 3. Fig. 5 shows in perspective an exploded view of the rearmos retainer of the device. DESCRIPTION OF EMBODIMENT The severing machine consists according to Fig. 1 of a stand 11 which at its lower part supports a rotatable disc 12 and at th upper part a feeding and cutting device 13. Reference numeral 1 designates the tubular hose-web, which is intimated in dash-and dot lines, and which in the embodiment shown is piled, i.e. i folded into a pack 15, which is arranged upon the rotatable dis 12. The feeding and cutting device incorporates a rotatable stationary lead roller 16, the rotational axis of which i vertically disposed and which is rotated by a not further show motor situated behind the control panel 17. The second lea roller 18 is supported by the device 19 according to th invention, which incorporates a rod 20, which at its rear end i supported in a retainer 21, which is fitted to a bracket 22 a the stand 11. The rod 20 may be arrested in different pulled ou or pushed in positions by means of a check screw 23. By means o a handle 24 on the lower side of the bracket 22, in which i provided an arc-shaped groove 25, it is possible to revolve th rod 20 with the retainer 21 about a vertical shaft journal 26 Between the bracket 22 and the retainer 21 is provided a plate 2 equipped with a scale 28, along which the angular position of th rod 20 can be red. On one longitudinal side of the rod is als provided a scale 29, by means of which the pushed in or pulle out position of the rod can be indicated. At the free front end of the rod 20 is provided a head 30, whic is pivotable about a shaft 31 arranged substantially parallel t the rod 20. The head 30 is equipped with an eccentricall arranged pivoting arm 32 for cooperation with a set screw 33 which is supported by a bracket 34 fitted to the rod 20. In orde to indicate the angular position of the head 30 relative to th rod 20 ther is provided upon the pivoting arm 32 a scale 35 an on the rod 20 a dial 36. At the head 30 in the extension of the rod 20 there is pivotabl supported a double-armed lever 37, at one lever arm 38 of whic is fitted a retainer 39 for the lead roller 18, whereas it second lever arm 40 with a bent portion 41 cooperates with compression spring 42 provided in a bore in the pivoting arm 32 By means of a set screw 43 provided at some distance from th pivot axis 44 of the lever 37 it is possible to arrest th obliquity of the lever 37 and thereby of the lead roller 1 against the action of the compression spring 42. A scale 45 a the upwardly bent lever arm end 41 facilitates the setting of th lever 37. By means of the device 19 according to the invention it is thu possible to adjust the mutual distance between the lead roller 16 and 18 to every occuring hose diameter, by pulling out the ro 20 more or less. The inclined position of the movable lead rolle 18 is adapted to the rotational speed of the driven lead rolle 16 thus, that an appropriate feed speed is obtained for the hose formed knitted web 14. The tilted lead roller 18 thus is pivotab le about the axis 44 in a X-Y plane in a system of coordinates about the shaft 31 in the Y-Z plane and about the shaft journ 26 of the retainer 21 about the X-Z plane, which means that t lead roller has a free, but limited movability, whereby al angular and pivot positions are indicated thus that a positio once set and aligned can be found again swiftly. Beside the two lead rollers 16 and 18 are provided one furth lead roller 46, lead pins 47 and a winding-up roller 48 for t belt or strip 49 severed from the material web 14. The severi device of the machine is designated 50. The invention is not limited to the embodiment shown but plurality of variants are possible within the scope of t claims.

Claims: CLAIMS 1. A device at machines for continuous separation of at least o strip (49) from a hose-formed material web (14), whereby t device (19) incorporates at least two lead rollers (16,18) least one (18) of which is tiltable relative to the other, th that the end portion of the material web, which is thread on t guide rollers at rotation of the guide rollers is imparted continuous, axial feeding motion towards a severing device (50), c h a r a c t e r i z e d t h e r e i n, that the. tiltable lead roller (18) is supported at one free e of an axially displaceable and in different displacemen positions arrestable rod (20), that the free end of the rod i pivotable to a limited extent on one hand about a shaft (31 mainly parallel with the rod and on the other hand about an axi (44) mainly perpendicular to the rod, and that the rod (20) i equipped with means (33,43) for arresting its free end i different angular positions. 2. A device as claimed in claim 1, c h a r a c t e r i z e d t h e r e i n, that the free end of the rod (20) is designed as an axiall rotatable head (30) equipped with an eccentrically dispose pivoting arm (32) for cooperation with a set screw (33) at th rod (20) and partly as a support for a compression spring (42) that at the head (30) is supported a double-armed lever (37), a one end of which is fitted a retainer (39) for the tiltable lea roller (18), whereas its other end is arranged to cooperate wit said compression spring (42), and that on one lever arm (38) o the lever (37) is arranged to act a set screw (43) for adjustmen of the lever position relative to the head. 3. A device as claimed in claim 1, c h a r a c t e r i z e d t h e r e i n, that the rod (20) is supported by a retainer (21) in which th rod is axially displaceable and by means of a clamping membe (23) is arrestable in different displacement positions, and tha the retainer (21) is pivotable in the displacement plane of th rod about a pivot pin (26) and by means of a second clampin means (24) is arrestable in different angular positions.

Inventors: ANDERSSON STURE, ANDERSSON, STURE
Applicants: NYA SVEGEA MASKINER AB, SVEGEA MASKINER NYA AB
Application year: 1988
Main classification: B26D3
IPC codes: B26D3, D06H7