DE10115297A1 - Core carrier for especially core holding self-adhesive tape rotatable pin fitted in base component and with eccentric section which when pin rotates is lifted from cut-out so it lies partially outside contour of base component - Google Patents

Abstract

The core carrier has a base component (2) to hold the core and to transmit torque to it, whereby the outer running surface of the base component is cylindrically formed, and at least one cut-out (21) is formed in the base component and extending into the running surface. At least one rotatable pin (3) is fitted in the base component and has an eccentric section (32) which when the pin rotates is lifted from the cut-out so that this section lies partially outside the contour of the base component.

Description

The invention relates to a core carrier for clamping cores onto the winding material, ins special self-adhesive tapes, wound or of which wound material is handled.

The winding of material to be wound on cores, which are arranged on core carriers individually or in groups on winding shafts and are driven using the core carriers, is known. Such a core support must meet a variety of demands placed on it:

• - When pushing a core made of cardboard, for example, over the core carrier no damage to the core will occur.
• - The secure fixing of the core must be ensured so that a through slip of the core carrier in the core does not occur.
• - The core carrier should be light in weight.
• - It must be paired with a long service life and excellent maintenance friendliness be excellent.

Comparable requirements are placed on the core carrier when it is on it there is a core with winding material that is to be unwound. For example, the This is the case when the goods are donated to a production process.

DE 43 09 062 A1 discloses an individually driven core carrier for winding shafts. The essential components of the core carrier form a liner, a basic body  Pressure piece and a slotted clamping ring, both the base body and the clamping ring have circumferential grooves for receiving two elastic rings. The transmission of the rotary movement of the winding shaft to that located on the clamping ring Lichen core takes place in which the pressure piece connected to the base body against the presses the bushing tightly on the winding shaft. The resulting Frictional force when the winding shaft rotates creates a torque that gets to the bottom body transferred and passed on to the clamping ring by means of the elastic rings becomes.

But neither the base body nor the clamping ring have a large number of outlets savings that allow increased evasion from the elastic rings.

DE 12 52 032 A1 discloses storage for a spool for unwinding and folding known free winding of band-shaped material on a very small winding mandrel, the coil being supported on one side and tiltable on all sides around the center of the axis.

The storage consists of a sleeve in which circumferential grooves are provided, and an elastic element that simultaneously transmits the torque of the Shaft and for tensioning the coil.

DE 21 42 286 A1 describes a core sleeve tensioning device with a hub for Insert into the end of a core sleeve.

The core sleeve clamping device is formed by a hub on which an O-ring is released device. By means of a recess in the hub, it is possible to slide one on Core sleeve in the axial direction on the core sleeve clamping device through the core sleeve to fix the O-ring.

From JP 62-041144 A1 a core carrier for winding shafts is known, which consists of a Liner, a friction body, a transmission element, two ball bearings and other components such as snap rings. The friction body is not inseparably connected to the liner.

This core carrier is mounted on a winding shaft in which a pressure hose is inserted is let. If air is applied to the pressure hose, a friction body in the Core carrier pressed by the pressure hose against a transmission element, its on the one hand carries a core. This creates between the friction body and the transmission element a torque that serves to drive the transmission element.  

However, the high number of individual parts of the core carrier means that the core carrier is very much must be manufactured in a complex manner and that, in addition, the assembly of the Winding shaft with the core carriers is very time and personnel intensive.

Furthermore, due to the complicated structure, the core carrier has a large overall height, so that the possible uses for cores with small inner diameters are limited are.

JP 02-132043 A1 discloses a core carrier which is comparable to the core carrier JP 62-041144 A1, shows a very complicated structure.

The core carrier consists essentially of a liner in which the core facing side wedge-shaped grooves are recessed to receive balls serve.

A pressure hose is embedded in the winding shaft impact friction body presses against the bottom of the liner, causing the barrel socket is driven.

With the appropriate rotation of the liner, the balls wedge between the core and liner. The transfer of the winding torque from the winding shaft to the Accordingly, the core is made in the core carrier via a large number of balls.

The US 3,817,468 A1 describes a core carrier / winding shaft combination, which consists of a There are a large number of individual components.

At least one pressure hose is embedded in the winding shaft, which with the corresponding Filling presses a friction body against a liner. In the other tread The bushing has grooves in which balls take the torque out of the barrel Transfer the socket to the core.

DE 12 37 398 A1 discloses a winding shaft with a large number of cores carriers can be equipped. Here too the friction transmission takes place, in which many in against the winding shaft loosely embedded friction body by means of a pressure hose the inner rings of the core carrier are pressed.

Each core girder consists of an inner ring, an outer ring and in through Refractions of the outer ring guided, slidably mounted clamping pieces.  

The US 4,220,291 A1 describes a winding shaft on which several cores at the same time can be wrapped. The friction is created with the help of balls, which are created using a Apply pressure hose directly to the cores.

Here individual core carriers are dispensed with, so that damage or ver wear a ball as a friction body after replacing the entire winding shaft pulls itself.

DE 11 43 074 A1 describes a winding shaft in which many individual, loose frames tion body can be pressed with a pressure hose against shoulder rings, the in turn carry the clamping devices equipped with the cores.

Furthermore, DE 195 17 226 A1 describes a core carrier for clamping cores, to wind up winding material, in particular self-adhesive tapes, is known, the core Carrier has a base body that receives the core and for transmission of the torque of the winding shaft on the core.

The base body has a flexible outer ring, which is a ring slotted on one side is executed, and a support ring, one in the outer ring and / or the support ring A large number of cutouts are provided, in which there is at least a dodge an elastic clamping ring of the base body, which ensures the friction lock Serve gene connection between the support ring and outer ring, takes place if from the outside radially acting pressure is exerted on the outer ring, as it is particularly when opening pulling cores onto the core carrier occurs.

DE 195 17 225 A1 describes a winding shaft for tensioning one or more Cores on one or more, side by side in the axial direction on the winding shaft arranged core carriers and for generating a torque in the core carriers for winding up material to be wound, in particular self-adhesive tapes, wherein there is a device in the winding shaft for the targeted delivery of a radially outward acting, freely selectable force is within a large range, in particular a pressure hose.

Due to the forces originating from the device, one or more friction tongues are in each core carrier, each in at least one recess in the tread of the Liner of the respective core carrier are arranged radially against the transfer supply element of the respective core carrier can be pressed, in order to avoid the friction between  Friction tongue and transmission element to generate a torque that Drive of the transmission element is used.

The invention is based on the object of creating a core carrier, which Does not have disadvantages of the prior art or at least not to the extent and at the same time fulfills the demands made, i.e. when pushing one Core made of cardboard, for example, does not damage the core over the core carrier that secures the core, that is light in weight, and that thanks to a long service life combined with excellent ease of maintenance is excellent.

To solve this problem, a core carrier is proposed, as described in more detail in the patent claims is marked.

If a winding material is to be wound on cores, the individual core carriers must be on the winding shaft before starting up the winding shaft with empty cores, which game can consist of cardboard in the case of winding an adhesive tape become. For this purpose, the intended number of core carriers is first placed on the winding shaft pushed. The core girders are firmly clamped together axially. Then who which the core carrier is equipped with a corresponding number of cores, in particular the cores in the middle of the winding shaft over a larger number of core carriers must be performed.

In principle, the same is shown when unwinding winding material located on cores Image. A roll with the material to be wound, for example on a cardboard core is pushed onto the core carrier and must be fixed on it in such a way that slipping is impossible.

Only in this way can a predetermined value of the web tension within the goods to be processed are ensured.

Accordingly, the invention relates to a core carrier for clamping cores to Winding material, in particular self-adhesive tapes, wind up and / or unwind, the  Core carrier has a base body that receives the core and for transfer Torque serves the core.

The outer tread of the base body is substantially cylindrical in shape, and in the base body is at least one recess extending into the tread available.

At least one pin is rotatably mounted in the base body, the Pen has an eccentric portion, which is the rotation of the pin from the Recess of the base body rises, so that this section partially outside of Contour of the basic body lies.

Rotation on the pin causes the eccentric portion of the same is also set in rotation. Since the central axis of the pen is not identical to that is that of the eccentric section, this rises with a corresponding arrangement voltage from the tread of the base body and is against the core of the winding material pressed. The further the pen is turned, the more the eccentric section of the Pen led against the core, so that at a certain point the core press on the section sits.

The core then no longer slips, even if goods are unrolled from it. The core carrier according to the invention also allows that during the unwinding process There is still a slight slip between the core and the core support, namely in a preferred embodiment, the pin can be fixed in its position. On this is the pressure exerted on the core by the eccentric portion adjustable up to the absolute press fit.

In order to facilitate the pulling up and pulling off of the core from the core carrier according to the invention tern, the edges of the base body are advantageously slightly beveled. At the same time ver this reduces the risk of damage to the cores during the winding process.

In a further preferred embodiment of the core carrier, the base body has exactly one recess in which exactly one pin is present.

The cutout preferably has the shape of a cylinder section, the section plane of which is aligned parallel to the central axis of the cylinder.  

The recess is also preferably shaped so that the side of the recess Discs from the base body remain that can support the core.

More preferably, the base body has the shape of a thick-walled hollow cylinder on.

To fix the core carrier on a shaft and thus a rotation of the core carrier with the shaft are in an excellent design of the core Carrier present on the base body devices with which it is releasably on a shaft can be fixed.

For example, a thread can be present in the core body, in which a The grub screw is in contact with the shaft. By tightening the grub screw presses it onto the shaft, the core carrier is firmly seated.

In another embodiment of the device, a disk is attached to the base body screwed, which carries a gear. This gear then provides the positive Contact with a wave.

It has proven to be particularly advantageous if the pin consists of a central cylindrical portion, a second eccentric cylindrical portion and one third centric cylindrical section.

The first and third sections of the pin are outside the recess in the bottom body stored in two perforations, the second section, the central axis of which is light is offset from the central axis of the other two sections detects itself within said recess.

More preferably, the eccentric cylindrical portion of the pin is provided with means for Roughen the surface, especially with a full-surface knurling. In this way, the friction between this section and the one located thereon Chen core greatly increased, so that the actual forces for tensioning the core carrier turn out to be lower.  

In a further preferred embodiment of the pin, this is with means for fixie position in order to be able to exert any force on the core NEN.

Finally, it has proven to be particularly advantageous if all components of the Pins made of metal and / or the core support made of plastic.

The core carrier according to the invention has a further series of advantages.

Due to the special design of the body is an un desired slipping of the core during the winding and / or unwinding process locked out. Prevent these high holding forces between the core and core carrier at the same time a lateral self-movement of the core on the core carrier. So that becomes a disadvantageous misalignment of the core prevented during the winding process.

Due to the small number of individual parts that make up the core carrier, one is particularly inexpensive production possible. The comparatively simple structure poses furthermore a very good maintainability for sure.

In the particularly advantageous production of the core carrier from plastic (given if with the exception of the pen), for example from Novatron HPV® from Poly- Penco, the core beams are still light in weight. Furthermore, the core Carrier made of the material mentioned characterized by a high stability.

The inventive core carrier is intended to be in a particularly excellently designed variant ante can be illustrated in the following by means of some illustrations, without going through the Want to unnecessarily restrict the choice of the figures shown. Show it

Fig. 1 shows the core support particularly advantageously carried out in the seitli chen view,

Fig. 2 shows the core pin of the carrier of Fig. 1 in the side view,

Fig. 3 shows the core support particularly advantageously performed with a pushed-out roll of tape prior to tensioning,

Fig. 4 shows the particularly advantageously designed core carrier, the roller pushed thereon being stretched with adhesive tape.

In Fig. 1, the particularly advantageously designed core carrier 1 is shown in the side view. The core carrier 1 is composed of the base body 2 and the pin 3 . Here, the core carrier 1 is also connected to a disc 4 , which can be clamped in a rolling device, not shown.

The outer running surface of the base body 2 is cylindrical, and the base body 2 has the shape of a thick-walled hollow cylinder.

In the base body 2 is a recess 21 extending into the tread before, which is particularly advantageously shaped. The recess 21 has the shape of a cylinder section, the sectional plane of which is aligned parallel to the central axis of the cylinder.

In the base body 2 , a pin 3 is rotatably supported.

The details of the pin 3 are shown in FIG. 2.

The pin 3 is composed of a central cylindrical section 31 , a second eccentric cylindrical section 32 and a third central cylindrical section 33 . The eccentric section 32 rises from the recess 21 of the base body 2 when the pin 31 rotates, so that this section lies partially outside the contour of the base body 2 .

The eccentric section 32 is provided with knurling all over.

In order to be able to rotate the pin 3 comfortably, a handle lever 34 is also formed on the pin 3 .

The first section 31 and the third section 33 are mounted outside of the recess 21 in the base body 2 in two through holes, the second section 32 , the central axis of which is arranged slightly offset from the central axis of the other two sections 31 , 33 , is located within said Recess 21 .

Fig. 3 discloses the core support 1 particularly advantageously performed with a pushed-out roll of adhesive tape 5 before tensioning, Fig. 4 the especially before geous executed core support 1, wherein the deferred it roll with adhesive tape 5 is stretched.

The roll of adhesive tape 5 consists of a cardboard core 51 , onto which a carrier material 52 which is provided with adhesive on one or both sides is wound in an Archimedean spiral.

The adhesive tape 5 is pushed onto the core carrier 1 , wherein, when the pin 3 is in the corresponding position, no damage to the cardboard core 51 occurs.

By rotating the handle lever 34 , the eccentric section 32 of the pin 31 rises from the recess 21 of the base body 2 . The section 32 presses against the cardboard core 51 until a frictional connection between the cardboard core 51 and core carrier 1 is established.

Deformations occur in the cardboard core 51 and in the adhesive tape spiral 52 , but these have essentially no effects on the quality of the adhesive tape 5 .

The adhesive tape 5 can now be easily handled, with a constant web tension, so that the feed into a subsequent processing process can take place under defined conditions.

Claims (9)

1. core carrier for tensioning cores in order to wind up and / or unwind winding material, in particular self-adhesive tapes, the core carrier having a base body which serves to receive the core and to transmit a torque to the core, wherein
the outer running surface of the base body is essentially cylindrical in shape, in the base body there is at least one recess extending into the running surface,
at least one pin is rotatably supported in the base body, the pin having an eccentric section which rises out of the recess in the base body when the pin rotates, so that this section lies partially outside the contour of the base body. 2. Core carrier according to claim 1, characterized in that the base body exactly has a recess in which there is exactly one pin. 3. core support according to claims 1 and 2, characterized in that the reason body has the shape of a thick-walled hollow cylinder. 4. core carrier according to claims 1 to 3, characterized in that the reason body is slightly beveled on its outer edges. 5. core support according to claims 1 to 4, characterized in that the reason Body devices with which it can be detachably fixed on a shaft can. 6. core carrier according to claims 1 to 5, characterized in that the pin a central cylindrical section, a second eccentric cylindrical section Section and a third central cylindrical section. 7. core carrier according to claim 6, characterized in that the eccentric cylindri cal portion of the pin is provided with means for roughening the surface, ins especially with a full surface knurling.   8. core carrier according to claims 1 to 7, characterized in that the pin with Means for fixing its position is provided. 9. core carrier according to claims 1 to 8, characterized in that all components the pin is made of metal and / or the core carrier is made of plastic.