DE202017102619U1 - Clamping device for label rolls - Google Patents

Abstract

Clamping device (1) for label rolls (10), comprising a cylindrical tube section (2) with a longitudinal axis (3) and an outer wall (4), wherein in the outer wall (4) at least one receptacle (5) is formed, in which a clamping element (6) is arranged, further comprising a clamping body (7) arranged within the cylindrical tube section (2) and between the clamping element (6) and the clamping body (7) arranged pressure body (8), wherein the clamping body (7) on its outer circumference guides (9), in which the pressure bodies (8) are guided and wherein the pressure bodies (8) are movable relative to the cylindrical pipe section (2) in the radial direction by a movement of the clamping body (7) such that the clamping element (6 ) can be pressed radially outward by the pressure body (8).

Description

The present invention relates to a jig for label rolls.

Such jigs are rotatable about an axis of rotation and are used in the winding and / or unwinding of webs of material, in particular of label strips used in machine labeling. On these self-adhesive labels are arranged one behind the other on a material web, also referred to as carrier tape, which are then transferred in a labeling apparatus to articles to be labeled. What remains after the labeling process, the bare carrier tape, which is wound into a carrier tape roll and then disposed of.

Such a jig is for example from the DE 10 2007 010 733 A1 and comprises an arrangement with a substantially cylindrical surface and at least one arranged in a circumferential groove of the surface elastomeric ring. By means of a displaceable in the direction of the axis of rotation of the actuator actuator, the ring can be bulged by force such that a between the ring and a mounted on the assembly, slotted longitudinally inserted material web is clamped by bulging of the ring.

A disadvantage of in the DE 10 2007 010 733 A1 described arrangement is her very complex, multi-part construction. In addition, it allows only a very indirect and thus possibly inaccurate control of the bulge caused by the elastomeric ring contact pressure, since the movement of the actuator takes place in the direction of the axis of rotation and the bulge of the rubber ring, which has a comparatively large cross-sectional area, not necessarily proportional to the movement the actuator behaves.

Object of the present invention is therefore to provide a jig for label rolls, which is equally suitable for winding and unwinding of webs and which overcomes the disadvantages of the prior art.

This object is achieved by a jig for label rolls with the features of the protection claim. 1

Concrete embodiments and developments of the invention are the subject of the dependent claims.

According to protection claim 1, the invention relates to a jig for label rolls, comprising a cylindrical tube section having a longitudinal axis and an outer wall, wherein in the outer wall at least one receptacle is formed, in which a clamping element is arranged, further comprising one within the cylindrical tube section arranged clamping body and arranged between the clamping element and the clamping body pressure body, wherein the clamping body has on its outer circumference guides, in which the pressure bodies are guided and wherein the pressure bodies are movable by a movement of the clamping body relative to the cylindrical pipe section in the radial direction, such that the clamping element can be pressed by the pressure body radially outward.

In other words, the clamping device according to the invention is characterized in that it comprises pressure bodies, which in the radial direction, d. H. in a direction perpendicular to the longitudinal axis of the cylindrical tube section, are movable and which are able to press radially radially outwardly by this radial movement directly the clamping element. In this way, a contact pressure is transmitted from the pressure bodies directly to the clamping element. The radial movement of the pressure body is effected by a movement of the clamping body, which is arranged within the cylindrical tube section. For this purpose, the clamping body has on its outer circumference guides in which the pressure bodies are guided or against which the pressure bodies are supported.

The clamping device according to the invention is characterized by a simple structural design and by a very direct controllability of the pressure applied by the pressure body, which will be explained in more detail below.

According to one proposal of the invention, the jig can be used to unwind a web wound on a roll core. For this purpose, the clamping element is preferably formed of an elastic material such as rubber and can be arched by the pressure body beyond the predetermined by the outer wall circumference of the cylindrical pipe section also radially outward.

A winding to be unwound with its roll core, which may be formed for example as a stable paperboard roll, placed on the cylindrical pipe section of the jig. In order to effect a tight fit of the roll core on the cylindrical pipe section and a possibly due to small tolerances in the inner diameter of the roll cores game between roll core and cylindrical pipe section, the clamping body arranged within the cylindrical pipe section is actuated such that the pressure bodies arranged between the clamping body and the elastic clamping element are moved radially outward. The pressure bodies moved in this way engage the elastic clamping element and press it outwards, the clamping element, due to its elasticity, being curved radially outwards beyond the circumference of the cylindrical tube section predetermined by the outer wall until it comes to rest firmly against the inside of the roller core , By the contact pressure and the associated static friction of the core is firmly clamped on the cylindrical pipe section and fixed against this. Upon rotation of the jig about an axis of rotation of the clamped winding thus rotates.

The thickness of the clamping element can be selected to be comparatively thin, so that the pressure exerted by the pressure body contact pressure transmits directly through the clamping element to the inside of the roll core. The clamping effect is thus very precisely controlled.

According to a further proposal of the invention, the clamping device can be used for winding a material web. For this purpose, the clamping element is preferably formed of a stiff, at most slightly yielding material and serves to pinch one end of the web. For this purpose, a gap is formed between the clamping element and the adjoining region of the outer wall in an overlapping region of clamping element and outer wall, which is suitable for receiving a carrier tape of a label roll. For this purpose, the pressure bodies are initially moved by a corresponding movement of the clamping body radially inward, so that the clamping element is relieved and is free from radially outwardly directed force. In this state, the gap formed in the overlapping area of the clamping element and the adjoining region of the outer wall increases, in which one end of the carrier strip can now be easily inserted. By repeated actuation of the clamping body, now such that the pressure bodies are moved radially outward and press the clamping element with it radially outward, the gap is reduced and introduced into the gap end of the carrier tape between an edge region of the clamping member and the overlapping with this Clamped area of the outer wall.

The rigid material of the clamping element is selected so that sufficient for holding the end of the carrier tape contact pressure of the clamping element is effected. It may be, for example, a solid plastic material such as PE or PP. Depending on the rigidity of the material, it may be the case that the clamping element only moves radially outwardly by a movement of the pressure bodies to the extent that the required contact pressure for clamping the end of the carrier tape is achieved, but that the clamping element does not continue beyond that through which Outside wall predetermined extent of the cylindrical pipe section bulges radially outward. Nevertheless, a choice of material for the clamping element is possible, in which both a sufficient contact pressure for clamping of the carrier tape end and a curvature radially outward beyond the outer wall given by the circumference is possible.

Compared with the embodiment of the invention described above, which is suitable for unwinding, it is therefore only necessary to use at least one stiffer clamping element in the embodiment used for winding and optionally to use pressure bodies adapted in their length. The basic structure of the device, however, can remain unchanged, which makes the jig according to the invention particularly flexible.

The pressure bodies can be formed in both described embodiments of the invention, for example, as pins or bolts of a plastic material or of a suitable metallic material. Between the cylindrical pipe section and the clamping body bearing, such as plain bearings and / or ball bearings, may be provided to guide the relative movement between the cylindrical pipe section and clamping body.

According to one embodiment of the invention, the pressure bodies can be moved by a rotational movement of the clamping body. The clamping body is preferably also cylindrical in shape and can be rotated within the cylindrical pipe section relative to this, wherein the axis of rotation can coincide with the axis of rotation used in a winding process. For this purpose, the clamping device preferably comprises an actuating element connected to the clamping body, via which the rotational movement of the clamping body can be effected. This is the better handling because of preferably arranged outside of the cylindrical tube section and may be formed detachably or fixedly connected to the clamping body. In its outer dimensions, the actuating element preferably does not protrude beyond the circumference defined by the outer wall of the cylindrical pipe section in the operating position, so that a winding to be placed on the clamping device can also be guided over the actuating element. The Actuating element may be formed, for example, as a knob.

An embodiment of the invention provides that the guides are designed for the pressure hull as continuously increasing in height ramps. As a result, a stepless movement of the pressure body in the radial direction is possible. The contour of the ramps can be designed such that the pressure bodies engage in an end position in which the pressure bodies are maximally extended radially outward. For this purpose, the contour of the ramp may have a detent over which the pressure body is moved away during extension and behind which it then engages. The ratchet can have a height of a few tenths of a millimeter, for example 2/10 to 3/10 mm.

Since in a winding process, in which at the end of the winding process, a winding sits tightly on the jig, and depending on the height of the ratchet, the pressure body to solve the winding of the device may not by moving the clamping body against the pressing force of the coil can be moved away from the latching position on the detent over an alternative form of Verrasterung can be provided, which can be realized for example by a provided on the actuating element means for producing a Verrasterung between the actuating element and the cylindrical pipe section.

The number of receptacles formed in the outer wall of the cylindrical tube section and the clamping elements arranged therein may vary as well as the orientation of the receptacles. Thus, these example meadow in the longitudinal direction, d. H. be aligned parallel to the longitudinal axis of the cylindrical pipe section, but they can also be formed in planes perpendicular to the longitudinal axis annular along the circumference of the cylindrical pipe section. Preferably, the jig comprises at least two clamping elements, more preferably three or more clamping elements.

In one embodiment of the invention, in the outer wall parallel to the longitudinal axis of three symmetrically distributed over the outer circumference of the cylindrical tube section receptacles are formed, in each of which a clamping element is arranged. In this case, preferably, each pressure element associated with each clamping element, which are arranged distributed in associated guides over the length of the clamping body. In particular, each clamping element can be assigned to one to ten, preferably two to seven pressure hull. The distances between the pressure bodies in the direction of the longitudinal axis of the cylindrical pipe section can be equidistant, but they can also vary in order to allow adaptation to windings of different widths.

The just said about the number and the spacing of the pressure body expressly refers not only to the aforementioned embodiment with three parallel to the longitudinal axis arranged shots but equally to any other embodiments of the invention.

The cylindrical tube section and / or the clamping body can be made according to a proposal of the invention in an extrusion of a metallic material, in particular aluminum or an aluminum alloy.

In the following the invention will be explained in more detail with reference to an embodiment and with reference to the accompanying drawings.

Show it:

1 : A perspective view of a jig according to the invention as part of a winding device;

2 : a clamping device according to the invention in longitudinal section;

3 : the jig off 2 in cross-section;

4 : perspective view of an actuating element;

5 : Sectional view of the actuator off 4 ,

1 shows a jig according to the invention 1 as part of a winding device 100 , wherein the winding device 100 in 1 only partially shown. In the 1 shown winding device 100 can be used for unwinding a web of material, for example a label tape, and also for winding a material web, for example a bare carrier tape. The jig 1 will be explained below in their function for the development of a label tape.

On the jig 1 is a label roll 10 deferred, with which on an inner roll core 13 made of cardboard a carrier tape 14 is wound on which self-adhesive labels not shown here are arranged one behind the other. The self-adhesive labels are fed to a further process step in which they are separated from the carrier tape 14 solved and labeled on Items are transferred. The winding device 100 can be part of a labeller.

The label roll 10 lies on the side of a plate 15 at. About a wave 30 , see. 2 , the jig can 1 and with her the roll of labels 10 be rotated in the direction indicated by the arrow D about a rotation axis. The result of this rotation of the label roll 10 unwound carrier tape 14 is via a first pulley 16 as well as one on a sprung dancer arm 17 mounted second pulley 18 guided. Following this, the carrier tape on further, in the 1 not shown pulleys are performed.

The jig 1 is inventively designed so that a tight fit of the label roll 10 on the jig 1 is feasible and due to low manufacturing tolerances in the inner diameters of the roll cores 13 possibly existing game can be compensated.

For this purpose, the jig 1 a trained as an extruded cylindrical tube section 2 with a longitudinal axis coinciding with the axis of rotation 3 and an outer wall 4 on, in better of the 2 and 3 apparent recordings 5 in the outer wall 4 clamping elements 6 are arranged, which over the through the outer wall 4 predetermined circumference of the cylindrical tube section 2 can be arched out radially outward, so that the roll core 13 firmly on the jig 1 can be jammed. The deadlock can be via a designed as a rotary actuator 11 be made as the basis of the representations of the 2 and 3 will be explained in more detail.

From the cross-sectional view of 3 it can be seen that in the outer wall 4 of the cylindrical pipe section 2 three pocket-like shots 5 are formed. These extend parallel to the axis of rotation 3 , which in the representation of the 3 directed in the plane of the drawing, and substantially over the entire length L of the cylindrical tube section 2 , Every recess 5 covers an angular range of about 95 °. This angle is for a recess 5 based on the two limiting legs A and B in 3 indicated.

In every recess 5 is in each case a clamping element 6 arranged, which in the clamping device used for processing a material web 1 is formed of an elastic rubber material. The clamping elements 6 can edge in the area of the inner wall of the recess 5 be fixed and also extend substantially over the entire length L of the cylindrical tube section 2 ,

A trained as an extruded clamping body 7 is inside the cylindrical tube section 2 arranged. The clamping body 7 is also cylindrical and can be inside the cylindrical tube section 2 be rotated with respect to this, wherein the axis of rotation with the longitudinal axis 3 coincides. The rotational movement of the clamping body 7 opposite the cylindrical pipe section 2 is about that with the clamping body 7 connected actuator 11 effected. The clamping body 7 has guides on its outer circumference 9 on, which are formed as continuously increasing in height ramps. The increase in altitude can be determined by the in 3 illustrated distances r1 and r2 are illustrated, wherein the distance r1 between the axis of rotation 3 and the ramp surface is about 15 mm while the distance r2 between the rotation axis 3 and the ramp surface is about 17 mm.

Between the clamping body 7 and the clamping elements 6 are pressure hulls 8th arranged, which are formed as metal pins. The pressure hull 8th are in the guides 9 guided and supported against these. The wall of the cylindrical pipe section 2 has bushings 19 for the pressure hull 8th on. By a rotation of the clamping body 7 opposite the cylindrical pipe section 2 in the clockwise direction according to the arrow S, starting from the representation of 3 the pressure hulls 8th along the guides 9 guided and due to the increasing height of the ramp-like guides 9 moved radially in the direction of the arrows R to the outside. The at the outwardly directed end of the pressure hull 8th adjacent clamping elements 6 are detected by this movement and also pressed radially outward, the clamping elements 6 due to the elasticity of their material by the pressure hull 8th over the through the outer wall 4 predetermined circumference of the cylindrical tube section 2 Be arched out radially outward. By this curvature over the outer circumference of the cylindrical tube section 2 in addition, with her roll core 13 on the jig 1 seated label roll 10 firmly jammed and secured against slipping or shifting.

To release the roll core 13 from the jig 1 is the clamping body 7 to turn in the opposite direction, leaving the pressure hull 8th along the guide 9 back to their starting position according to 3 be guided. The clamping elements 6 be relieved and the roll core 13 can be removed.

The rotation of the clamping body 7 is in each case via a rotation of the associated with this actuating element 11 effected.

The contour of the guides designed as ramps 9 is designed so that the pressure hull 8th in the position in which they are maximally extended radially outward, engage. For this purpose, the contours of the ramps each have a detent 20 on, over which the pressure hulls 8th are moved away during extension and behind which they then engage. The ratchet has a height of 2/10 mm. In the narrower sense, the guide increases continuously thus only up to the Rasthöckern 20 at.

Based on 2 it can be seen that in the embodiment shown here, the pressure bodies are distributed substantially equidistantly over the length L, with the exception of one in the vicinity of the plate 15 provided pressure hull 8th which has a smaller distance to the adjacent pressure body. This makes it possible, the jig shown 1 for label rolls 10 to use different width B and nevertheless always a tight fit on the jig 1 to ensure. A wide label roll 10 , whose width B is of the same order of magnitude as the length L, becomes over its width B by several pressure bodies 8th supported. But even a narrow label roll 10 , whose width B is about only a quarter of the length L, is pressed closer by the plate closer arranged pressure body 8th sufficiently supported.

After the jig has been explained in its function for the development of a label tape, it should now be explained in their function for winding a material web, for example a bare carrier tape, which is also based on the 2 and 3 can be done

In this embodiment, at least one clamping element 6 made of a rigid material, here made of a solid plastic, and serves to pinch one end of the carrier tape. For this purpose is between the clamping element 6 and the adjacent area of the outer wall 4 in an overlapping area of clamping element 6 and outer wall 4 A gap 12 formed, which is adapted to receive the end of the carrier tape. These are the pressure hull 8th by a corresponding movement of the clamping body 7 initially moved radially inward, so that the clamping element 6 is relieved and free from radially outward directed force effect. In this state, the enlarges in the overlap region of clamping element 6 and adjoining area of the outer wall 4 trained cleft 12 so far that one end of the carrier tape can now be easily inserted. By repeated actuation of the clamping body 7 , now so that the pressure hull 8th be moved radially outwardly in the manner described above and the clamping element 6 press radially outward, the gap is 12 downsized and in the gap 12 inserted end of the carrier tape between an edge region of the clamping element 6 and with this overlapping region of the outer wall 4 firmly pinched. The thus clamped at one end carrier tape can now by rotation of the jig 1 around the axis of rotation 3 to be wound up into a carrier tape roll.

Compared to the previously described, suitable for unwinding embodiment of the invention are thus used in the embodiment used for winding only at least one clamping element 6 replace and optionally adjusted in length pressure body 8th use.

Above was already the special contour of the guides 9 described, which is used to latch the pressure hull 8th Rest hump 20 exhibit. Will be a clamping body 7 with such trained guides 9 used in a winding, in which at the end of the winding process, a winding tight on the jig 1 sitting, it is sometimes not possible to solve the winding of the jig 1 against the pressing force of the coil to apply sufficient force to the pressure hull 8th from the locking position on the detent 20 to move away. For this case, an alternative form of Verrasterung be provided, which is based on the 4 and 5 is clarified. Here the actuator comprises 11 a detent pin 21 who is in a leadership 22 is guided and a Verrasterung between the actuator 11 and the cylindrical pipe section 2 serves. About the length of the guide 22 can be a maximum possible angle of rotation for the actuator 11 and the associated clamping body 7 be set.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007010733 A1 [0003, 0004]

Claims (11)

Clamping device ( 1 ) for label rolls ( 10 ), comprising a cylindrical pipe section ( 2 ) with a longitudinal axis ( 3 ) and an outer wall ( 4 ), whereas in the outer wall ( 4 ) at least one recording ( 5 ) is formed, in which a clamping element ( 6 ), further comprising one within the cylindrical tube section ( 2 ) arranged clamping body ( 7 ) and between the clamping element ( 6 ) and the clamping body ( 7 ) arranged pressure body ( 8th ), whereby the clamping body ( 7 ) on its outer circumference guides ( 9 ), in which the pressure bodies ( 8th ) and wherein the pressure bodies ( 8th ) by a movement of the clamping body ( 7 ) relative to the cylindrical pipe section ( 2 ) are movable in the radial direction, such that the clamping element ( 6 ) through the pressure bodies ( 8th ) can be pressed radially outward. Clamping device ( 1 ) according to claim 1, wherein the clamping element ( 6 ) is formed of an elastic material and by the pressure hull ( 8th ) over the through the outer wall ( 4 ) predetermined circumference of the cylindrical pipe section ( 2 ) can be arched out radially outward. Clamping device ( 1 ) according to claim 1, wherein the clamping element ( 6 ) is formed of a rigid material. Clamping device ( 1 ) according to claim 3, wherein between the clamping element ( 6 ) and the adjoining region of the outer wall ( 4 ) A gap ( 12 ), which is suitable, a carrier tape of a label roll ( 10 ). Clamping device ( 1 ) according to one of claims 1 to 4, wherein the pressure bodies ( 8th ) by a rotational movement of the clamping body ( 7 ) are moved. Clamping device ( 1 ) according to claim 5, comprising a with the clamping body ( 7 ) associated actuator ( 11 ), via which the rotational movement of the clamping body ( 7 ) is feasible. Clamping device ( 1 ) according to claim 6, wherein on the actuating element ( 11 ) means for producing a latching between the actuating element ( 11 ) and the cylindrical tube section ( 2 ) is provided. Clamping device ( 1 ) according to one of claims 1 to 7, wherein the guides ( 9 ) for the pressure bodies ( 8th ) are formed as continuously increasing in height ramps. Clamping device ( 1 ) according to one of claims 1 to 8, wherein in the outer wall ( 4 ) parallel to the longitudinal axis ( 3 ) three evenly over the outer circumference of the cylindrical tube section ( 2 ) distributed recordings ( 5 ) are formed, in each of which a clamping element ( 6 ) is arranged. Clamping device ( 1 ) according to claim 9, wherein each clamping element ( 6 ) several pressure bodies ( 8th ) associated in associated guides ( 9 ) distributed over the length of the clamping body ( 7 ) are arranged. Clamping device ( 1 ) according to one of claims 1 to 10, wherein the cylindrical pipe section ( 2 ) and / or the clamping body ( 7 ) are produced in an extrusion process.

Images