DE7622060U1 - COIL OR REWINDING mandrel - Google Patents

Description

27 5 ^ 7

PATSNTANWÄS / TE

dr. ing. H. NEGENDANK (-1973) dipping. H. HAUCK · »ipl.-phys. W. SCHMITZ DiPL.-iNG. E. GRAALFS dipping. W. WEHNERT DIPL.-PHYS. W. CARSTENS

HAMBURG-MUNICH

ADDRESS FOR DELIVERY: 20OO HAMBURG 3β · NEUER WALL 41 _{IBLKPON (0} 40) 3β 74 28 I ₁ ND 3β 4! 15th

TELEOR. NEOEDAPATBNT HAMBUIlQ

Nishimura Seisakusho Co., Ltd. sooo Munich 2 · mozartsth. 23

21 Minaminawashiro-cho, Kamituba, tkbfon <oso> β ae oa se

TELEGR. NEQEDAFATENT MUNICH

Kyoto

Hamburg, November 9, 1976 Japan

Winding or rewinding mandrel

The invention relates to a winding or rewind mandrel for receiving a number of tubular winding cores which are individually held by frictional engagement.

A winding mandrel for receiving tubular winding cores, the are held individually by friction by means of a number of friction rings is mentioned. The friction rings and a number of tubular cardboard core holders alternating on a single central shaft are held in place by axial pressure. In this device are a Number of tubular cardboard cores, each extending over one, two or more cardboard core holders, are mounted on a single shaft and are simultaneously with the shaft rotated in order to simultaneously wind up perforated paper tapes or other long-dimensioned material webs. Here everyone can i Holder for the tubular cardboard cores with frictional engagement

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7622060 24.0177

genüber the adjacent un Reibrinaen ^H slip · ro each archetype strength cardboard core can slip independently on the '.'olle. In the known device of this type, the holder for the tubular cardboard cores is provided on the outer surface with tangentially protruding teeth which come into engagement with a tubular cardboard core penetrating into the inner surface of the same. The use of such cardboard core holders, however, takes a lot of time and work into fitting and removing the cardboard tubes and has the disadvantage that the cardboard tube cores can be damaged and, moreover, the teeth are dangerous for the operator.

The main object of the invention consists in the Schaffuna of a new and improved W i c k e 1 d o r η e b for receiving cylindrical winding cores on a We lie, where in the attachment and removal the tubular cardboard cores can be carried out simultaneously and automatically through the use of compressed air can.

Other objects and advantages of the invention will appear as follows detailed description of the invention.

The device for holding cylindrical winding cores According to the invention, on the winding mandrel has a driven hollow shaft which has several at equal axial distances has arranged openings which connect the inside of the hollow shaft to the outside. The interior of the hollow shaft can Compressed air are supplied, with several friction rings and several Kernhaiterbaugruppen arranged alternately on the hollow shaft

7622050 24.0177

are. Means are provided to keep the arrangement of the friction channel and the core holder haunruooen under axial pressure on the hollow shaft χ u.

Each friction channel is axially displaceable on the hollow shaft, but held so that it rotates with the hollow shaft. Each KernhalterbauqruDDe has an annular body which is arranged with frictional engagement between the two friction rings. The ring body has a pressure chamber provided in the same and has at least one opening that connects the pressure chamber to the outside of the ring body and at least one further passage that connects the pressure chamber to the hollow shaft through which compressed air can be introduced into the pressure chamber. An expansion device is provided in the pressure chamber, which can be expanded radially in response to compressed air introduced into the pressure chamber. Each expansion device interacts with friction drivers which, together with the expansion device and through the opening in the ring body, can be moved between a first position and a retracted position. In the first position, the free end of the friction driver protrudes from the opening and engages the inner wall surface of a cylindrical core placed on the ring body. ^In the retracted position, the friction driver is at a distance from the inner wall surface of the core.

According to a preferred embodiment of the invention ta ride s, the pressure chamber in the ring body is replaced by an outer one Circumferential wall, an inner circumferential wall and two end walls

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borders. The outer peripheral wall has at least one opening, via which the pressure chamber is connected to the outside of the annular body. The inner peripheral wall has at least one Passage that connects the pressure chamber with the interior of the hollow shaft in order to introduce compressed air into the pressure chamber. the Expansion device preferably consists of an elastic one Half-tube, which is essentially the inner wall area of each outer university wall and the end walls of the ring body covered. A spring can additionally be provided around the friction driver move back from the first to the retracted position when the compressed air supply to the pressure chamber is turned off is. It is desirable to have the friction rings with core holder assemblies on both end walls of the ring body and on the inner peripheral wall of the ring body with frictional engagement attack.

For a better understanding of the invention, the same shall be based on of the accompanying drawings showing an embodiment are described, with like reference numerals for like Parts have been used. Show it:

Fig. 1 is a front view partially cut, Jjs winding mandrel according to the invention;

FIG. 2 is a partially sectioned view on an enlarged scale of part of the winding mandrel shown in FIG ;

3 shows a vertical section of the winding mandrel along the line

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3-3 of Figure 2; and

4 shows a vertical section of the winding mandrel along the line 4-4 of Fig. 2.

Reference is now made to the drawings, in particular FIG. 1, in which a winding mandrel according to the invention is shown. On a driven hollow shaft 13 between two end rings 14 and 15 are several friction rings designated as a whole with 11 and several as a whole with 12 Core holder assemblies arranged. The hollow shaft 13 is mounted in a suitable manner at both ends (not shown). To rotate the hollow shaft 13, a rotary force can be exerted on it at one end 13 a. The hollow shaft 13 is also with a port 16 for supplying pressurized air to the interior thereof. Inclusion 16 in Figure 1 is connected to a source of pressurized air (not shown). The end ring 14 rests on a flange 17 which is formed in one piece with the hollow shaft 13. The other end ring 15 is slidable on the Hollow shaft 13 is arranged and is at a distance from an end closure 18, which is fixedly arranged on the hollow shaft 13

-p end net is to close the other / to. Between the end ring 15 and a spring 19 is disposed on the end cap 18 which defines the entire assembly of the friction rings 11 and the core holder assemblies 12 compresses between the two end rings 14 and 15 towards the flange 17, which is formed in one piece with the hollow shaft 13 is.

The arrangement of the several friction rings 11 and the metric core

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holder assemblies 12 on the driven hollow shaft 13 shown on a larger scale in FIGS. The driven hollow shaft 13 has several, in the same axial Spaced holes 21, which the interior of the hollow shaft connect to the outside of the same.

Each friction ring 11 can in the middle of its length with one Flange 11 a be provided and is arranged on the hollow shaft 13 that it is axially displaceable thereon, but so is held on to turn with her. A key 22 is between each friction ring 11 and the hollow shaft 13 arranged.

Each of the core holder assemblies 12 is between two adjacent ones Friction rings 11 arranged. A friction ring 11 is also between the end ring 14 and the leftmost core holder assembly and arranged between the rightmost core holder group and the end ring 15 (see Fig. 1).

Each of the core holder assemblies 12 may preferably be an annular body have in frictional engagement with two adjacent ones Friction ring 11 stands. The ring body can preferably have an outer ring 31 a and an inner ring 31 b, which with each other by a suitable fastening element such. B. a screw 32 are fastened together. The outer one and the inner ring 31 a and 31 b beqrenzen a pressure chamber 33 between them. The outer ring 31 a forms the outer one Peripheral wall of the pressure chamber 33, while the inner channel 31 b, the inner peripheral wall and two end walls of the pressure chamber

. . .11

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3 3 forms. The inner ring 31 b engages with both caulking surfaces and with the sweeter, exposed surface of the inner wall rubbing against the friction rings 11. The outer ring 31 a is with at least one opening, preferably four openings 34 provided that the pressure chamber? 3 with the outside of the ring body G 31 connect. The inner ring 31 b, which is the inner peripheral wall of the annular body is provided with at least one opening 35 which connects the pressure chamber 33 with the interior the hollow shaft 13 connects via a hole 21 in order to let compressed air into the pressure chamber 33.

An expansion device 36 is arranged in the pressure chamber 33, which is radially expandable in response to the introduction of compressed air into the pressure chamber 33 and which consists of a elastic half-tube may consist of substantially the inner wall surface of each outer peripheral wall and the Stemmf1flächen of the ring body 31 covered.

Friction drivers 37 are provided with the stretching devices 36 which slide together with the stretching device 36 and through the corresponding openings 34 in the outer Circumferential wall of the outer bolt 3'i ^ of the ring body 31 is movable are. The friction drivers 37 can assume a first position, in which the free end thereof protrudes from the openings 34 in the outer peripheral wall and with the inner wall surface a tubular pan core 41 comes into engagement, if di, .ser on the ring !: ör ρ er is arranged. The friction

carriers can take a retracted position, in

which they are a distance from the inner wall surface via tubular

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Have cardboard core 41. Each friction driver 37 is preferably connected to the expandable heating tube 36 via a leaf spring 39. The leaf spring 3 is air Riickste 9 ¹ 1 spring to the Peibungsmitnehmer 37 to move from the advanced to the retracted position when the pressure chamber is relieved pressure 33rd When compressed air is supplied to the pressure chamber 33, the leaf spring 39 can participate in the expansion of the elastic half-tube 36 in order to press the friction driver 37 outward through the corresponding opening 34.

Fin sealing ring 51 can be inserted around the hollow shaft 13 so that it is arranged in each case between two adjacent friction rings 11, bridging them. The outer circumferential surface of the sealing ring 51 is in sliding contact with the inner wall of the two adjacent friction rings 11. The sealing ring 51 is also provided with a small through hole 53, which connects the opening 35 in the inner wall 31 b of the ring body 31 with the hole A of the hollow shaft 13.

'"' ■ '.! F the \' li nkel spine of the construction described above are tubular =! Esch above Papnkerne over the core holder assemblies 12 ^n. The inner diameter of the tubular cardboard cores ^ l is slightly larger than the outer diameter of the outer ring 31 ο of each Core holder assembly, so that the tubular panp cores ^Λ 1 mounted freely on the core holder assemblies 12 ', ■ / ground

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Inside the hollow shaft 13 via which one end of the same is inserted, it reaches the individual pressure chambers 33 via the holes 21, the small holes 53 and the openings 35, so that the expandable tube 36 is expanded radially, the friction drivers 37 through the openings 34 protrude until they are pressed against the inner surface of the tubular cardboard cores 31 (see Fig. 4 and the right Half of Fig. 2). In this way, the tubular cardboard cores 41 are held on the core holder assemblies 12. When the compressed air supply is switched off, the expandable half-tubes 36 retreat to their original position and give the tubular cardboard cores 41 free. The two left core holder assemblies shown in FIG. 1 show the friction dogs 37 in their retracted positions. During the When the winding mandrel is in operation, the compressed air is either constantly supplied, or both ends of the hollow shaft 13 are closed in order to maintain the air pressure inside.

Slotted paper tapes or other materials can be wrapped around the tubular cardboard cores 41 which are thus held on the core holder assemblies, wherein the hollow shaft are inevitably driven at a higher speed than the tubular cardboard cores and the Rotate core holder assemblies. The core holder assemblies 12 have a slip that is the difference in rotational speed corresponds and become passive due to the frictional torque driven as a result of the slip.

Regarding the frictional torque, anyone can choose

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Value can be achieved by the size of the axial pressure from Shaft end is changed forth so that the wound objects can be wound with any desired hardness .

Since the subject of the invention described so far, the attachment the tubular cardboard cores 41 is achieved by air pressure in connection with the expansion device 36 attaching and removing as well as tightening and releasing the tubular cardboard cores 41 on the winding mandrel extremely simple and since the core holders do not need to have any serrations, as in the known device no possibility of damaging the tubular panorama cores and also no danger when putting them on and taking them off. Furthermore, the individual parts are simply constructed and require little manual operation. They are also economical to manufacture and advantageous because they have a long service life.

In addition, in actual usage examples such as the winding tension is in winding thin films is very low and that in the case of films that several hundred millimeters wide, the number of engaging core supporting assemblies appekernen with the tubular ^p is increased so that the side pressure required from one end can often be relatively small. In this regard, the winding mandrels of the known individual friction type have the disadvantages that such a low pressure is not uniform over all core

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holder assemblies the mandrel is distributed to ", and that the unevenness in the roughness of the friction surfaces ez makes impossible a g 1 ei chmäß i η e s R ei ^ u η α sdrehm ο me η t to achieve When winding mandrel according to the invention are ^α Ί! e Friction irregularities of the friction surfaces are immediately compensated for, so that the disadvantages described above cannot occur.

More precisely, the frictional pressure in the winding mandrel is in accordance with of the invention to produce de «; Friction torque of the lateral pressure exerted from the shaft end minus the air pressure, on the lateral end faces of the friction rings 11 acts so that the advantage is that the side pressure can be increased accordingly. In other words, the friction surfaces are constantly subjected to an effect by the air pressure tends to increase the margins.

If, therefore, when compressed air is introduced into the pressure chamber 33, the very small clearance between the inner ring 31 ρ of the ring body 31 in any of the pressure chambers 33 and an adjacent friction channel 11 becomes greater than the clearance to the adjacent pressure chamber, the amount of air leaking through is caused by the greater leeway η r ö ß er than the leakage through the second clearance, so that P el er air pressure in de r corresponding pressure chamber is lower than that in nor second pressure chamber 33, so that the Rei bring 11 the pressure in the pressure chambers 33 is exposed, the friction ring 11 being moved a very small amount axially to the pressure chamber .- · '" with the lower pressure in order to reduce the clearance

and thus as: the leakage of the air so that an air pressure i "takes place equalization in the pressure chambers 33 on this \, the suppressors are balanced to the friction surfaces f and scored the friction torque This effect is enhanced when the small holes 53 yet.. be made smaller. ι

sneeze changes the clearance between the friction surfaces> are very low and are of the order of thousandths of a millimeter, the ten that the leakage of air AUTHORIZING \, and they can not only by the movement of the rings
and holder, but also by a very small amount of deformation of the parts as a result of the changes
the pressure, but the parts can high stability ha-\> calc. :

While the above effect with reference to two adjacent
Pressure chambers has been described, will have the same effect between said spaced areas (each of which a plurality of: having coils) along a long shaft instead of a number of Ringon and coils are arranged on the _h. In this case, together with the friction rings 11, the core holder assemblies are also axially to a very small extent
moved and if several sets of these rings and holders are moved, the total amount of movement corresponds to the sum of the individual movements.

'.! ie in so far as V u du erbi η g η r icke 1 d ο described in accordance with the invention with the W ^1, which moves between the Zusammenwrkung of

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the external pressure and the force returned the inside through the air pressure constantly the rings and coils next to each other a very small amount, what the surprising superior effect of the compensation of the frictional torque about the entire length of the cathedral.

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Claims (5)

- ι. Patent claims: 1. Winding or rewinding mandrel to accommodate a number of tubular winding cores which are individually held by frictional engagement, characterized in that one Hollow shaft (13) several arranged at equal axial distances, the inside with the outside of the hollow shaft (13) has connecting holes (21), the inside of the hollow shaft (13) compressed air via a connection (16) can be supplied that several friction rings (11) and several core shark assemblies alternately on the hollow shaft (13) are arranged, of which each friction ring (11) can slide on the hollow shaft, but is held so that it rotates with the hollow shaft (13) that each of the core holding assemblies (12) is characterized in that between two adjacent friction rings (11) each one Annular body (31) is arranged with frictional engagement, which has a pressure chamber (33) which has at least one Opening (34) with the outside of the ring body (31) and at least one further passage (35, 51, 21) with the Inside the hollow shaft (13) is connected, which latter passage for the introduction of compressed air into the pressure chamber (33) serves that in each pressure chamber (33) an expansion device (36) is arranged, the response to in the Compressed air introduced into the pressure chamber (33) is radially expandable, so that the expansion device (36) with a friction Durc Ii driver (37) interacts with the same and / the opening (34) in the outer Hmfanciswand (31 a) of the ^D innkörpers (31) between a first urine in which the . . ./15 76? 2060 IkMJl at the end of the friction member (37) from the opening (3 4) protrudes and at the I η η e η w a η d f "i h" c h e one on the Ring body (31) attached cylindrical! '' Ick el kernes (41) attacks and a second retracted position, in which the row driver (37) is at a distance from the inner wall surface of the core (41) is movable, 2. winding mandrel according to claim 1, characterized in that the pressure chamber (33) bounded by an outer peripheral wall (31 a), a peripheral wall (31 b) and two end walls is that the outer peripheral wall (31 a) at least one the pressure chamber (33) with the outside of the annular body (31) has a reducing opening (34) that the inner peripheral wall (31b) has at least one passage (35), which connects the pressure chamber (33) for introducing compressed air into the same with the interior of the hollow shaft (13) is. 3. winding mandrel according to claim 1, characterized in that the The expansion device (36) comprises a resilient half-tube which essentially forms the inner wall of each outer Circumferential wall (31 a) and the end faces of the ring body (31) covered. 4. winding mandrel according to claim 3, characterized in that a Spring (39) is provided, the r'cn friction driver (37) from the first position to the second retracted position moved when the pressure chamber (33) print is ti astet. 5. mandrel according ^Ai'snruch:; , characterized in that the ... / 16 ■ ^? 6 ?? Π8η 2 ^ .02.77 - If. _ Friction ring (11) Ht the end walls of the core structure qrupnen (12) and the inside w a η d Ή see the ring body (31) are movable in R e i b u η q s e i η π r i f f. 76 ?? 060 02/24/77