EP0866017A1 - Device for clamping a tube on a rotatingly driven tubular body - Google Patents

Abstract

The web of paper, metal foil, plastics foil etc. is wound onto or off a roll which is fixed to a bush (5). The bush rests on a hollow spindle (15) and the spindle and bush may rotate together. The hollow spindle has a series of holes, each with a number of spring-mounted locking pins (40) which extend outwards to engage with the bush when the hollow spindle cavity is pressurised. When the pressure is relaxed, the pins disengage from the bush.

Description

The invention relates to a device for clamping one for winding and / or unwinding flat material webs arranged on a tubular body, which due to the clamping action of at least one of them bringable clamping element together with the around a longitudinal axis rotatably driven tubular body is operatively connected.

The present invention addresses the problem of Winding and / or unwinding flat sheet materials, such as Sheets of paper, plastic, metal foils or the like on or by a suitably trained for it Sleeve body. It is necessary that the Sleeve body either on a so-called mandrel or pushed onto a tension shaft in the axial direction and is operatively connected to it by suitable clamping means, that the sleeve body together with the mandrel respectively rotatable about a common longitudinal axis with the tension shaft is connected.

For clamping so-called core bodies (winding cores) Clamping devices are generally known, in which, for example in a first variant on the outer jacket a support tube rotatable about its longitudinal axis several in the circumferential direction distributed and longitudinally oriented grooves are intended for receiving hoses or at a second variant, a single one oriented in the axial direction Hose arranged in the interior of the support tube is, the hoses by filling with a suitable medium be changed in the outer diameter such that with the external hoses or those in the interior of the support tube arranged hose related Pressure elements are pressed radially outwards and thereby engaging with the inner wall of the sleeve body are feasible. These known tensioners have under A limited consideration of the clamping force that can be achieved with this Scope of application. In addition, the constructive Structure of the with the outer grooves or with the individual openings for the support tubes provided with the pressure elements relatively expensive. In addition, the hoses, in particular but those arranged on the outer diameter Hoses relatively prone to failure.

In a tensioning device according to EP-A 0 413 890 the Sleeve body by a number axially and radially adjustable Sliders with one driven rotatably about its longitudinal axis Carrying body engaged, the sliders each in a guideway designed as an inclined plane one of a piston / cylinder unit in the axial direction arranged relative to the support body displaceable cylinder core and depending on the direction of movement together with radially after a respective clamping element arranged thereon can be adjusted outside or inside.

The invention has for its object a device according to the preamble of claim 1 improve that while maintaining a clamping security the constructive structure of the individual elements is essential simplified and the clamping elements arranged on the tubular body easily accessible and exchangeable if necessary without any special effort are.

The object is achieved in that the Interior of the tubular body as a self-contained and pressure chamber to be charged with a gaseous medium is and on the tubular body several in the axial direction and arranged in the circumferential direction clamping elements are, which are inserted into the pipe wall and each with a pressure piece are provided, which of the in the interior existing pressure is radially displaceable outwards with the inner wall of the sleeve body to be clamped in Can be brought into engagement and the sleeve body is relieved of pressure is freely traceable.

With the device according to the invention, the entire Length of the tubular body designed as a support element with the individual clamping elements arranged thereon a creates even tension. The assembly or disassembly the individual clamping elements on the tubular body can be easily done from the outside. Filling and emptying can also be carried out of the tubular body designed as a pressure chamber by means of Valves carried out without further, expensive tools will. The proposed device also enables a standardization and thus an economical production of the individual components.

Further features of the invention result from the description of embodiments in connection with the drawing and the claims.

Fig.1

eine als erstes Ausführungsbeispiel in Ansicht dargestellte Vorrichtung zum Aufspannen eines Hülsenkörpers;

Fig.2

ein zweites Ausführungsbeispiel der in Ansicht dargestellten Vorrichtung;

Fig.3

ein als Sprengzeichnung und im Schnitt dargestelltes Spannelement für die Vorrichtung gemäss Fig.1 oder Fig.2;

Fig.4

das in zusammengebautem Zustand sowie im Schnitt dargestellte Spannelement;

Fig.5

einen in grösserem Massstab dargestellten Schnitt entlang der Linie III-III in Fig.1; und

Fig.6

eine in Ansicht dargestellte Variante des Spannelements für die Vorrichtung gemäss Fig.1 oder Fig.2.

The invention is described below with reference to the drawing. It shows:

Fig. 1

a device shown as a first embodiment in view for clamping a sleeve body;

Fig. 2

a second embodiment of the device shown in view;

Fig. 3

a shown as an exploded view and in section clamping element for the device according to Fig.1 or Fig.2;

Fig. 4

the clamping element shown in the assembled state and in section;

Fig. 5

a section shown on a larger scale along the line III-III in Figure 1; and

Fig. 6

a variant of the clamping element shown in view for the device according to Fig.1 or Fig.2.

For winding and / or unwinding flat materials in the form of Sheets of paper, plastic, metal foils or the like onto a sleeve body or from a sleeve body 1 shows a device 10 as the first exemplary embodiment and in FIG. 2 a device as a second exemplary embodiment 20 shown. The first device 10 is one-sided stored mandrel and the second device 20 as both sides mounted tension shaft. The two devices 10 and 20 are arranged offset from one another Provided clamping elements 30 or 30 'and each for receiving a sleeve body that can be slid on in the axial direction 5 (Fig.1) trained. The special design of the two Devices 10 and 20 and the individual clamping element 30 and 30 'are described in detail below.

The first device shown in a schematic view in FIG 10 comprises a hollow cylindrical tubular body 15, which at one end by a not shown in Used sealed or by a way Screwed fastened first flange 12 and to the other opposite end through a second flange 11 is closed. The second flange 11 is schematic on one shown support element 1 a not shown Drive or brake unit attached. By means of the The drive or braking unit can be the device 10 together with the clamping action of the clamping elements 30 or 30 ' on the tubular body 15 held sleeve body 5 around a common horizontal longitudinal axis X in the direction of arrow X 'or but be slowed down.

In Figure 1, the tubular body 15 is shown partially cut away and you can see the tube wall 17 and the interior 18, which by the two at the ends of the tubular body 15th arranged and fastened flanges 11 and 12 as one in closed chamber is formed. The device 10 comprises still a number in the circumferential and in the longitudinal direction on the tubular body 15 offset from one another Clamping elements 30 or 30 '. The clamping elements 30 or 30 'are each in a pipe wall 17 penetrating in the radial direction Recess 16 (Fig.5) arranged and not shown, known means attached sealingly. The single tensioning element 30 or 30 'is shown later in Connection described with Figures 3, 4 and 6.

The interior 18 of the two flanges at both ends 11 and 12 closed tubular body 15 of the device 10 essentially serves as a pressure chamber (reservoir), which after pushing on the sleeve body 5 by means of a 1 schematically illustrated pressure source 2, for example with a gaseous medium, for example with compressed air in of the order of 6 bar. To connect the pressure source 2 is on the tubular body 15 for example, check valve screwed into the tube wall 17 (not shown) provided which to relieve the pressure chamber and thus to release the sleeve body 5 for example, can be operated without additional aids can.

Fig.2 shows the second embodiment in view shown device 20, which has a hollow cylindrical Tubular body 25 and several in the circumferential and in the longitudinal direction clamping elements 30 arranged thereon offset from one another or 30 '. The tubular body 25 is partially cut open shown and you can see the tube wall 27 and the interior 28. Deviating from that shown in Fig.1 in the second device 20, the first device 10 is the Tubular body 25 at both ends by a not shown in Used sealed or by a way Screw connection fastened flange 23 and 23 'closed. There is an axle body on each of the two flanges 23 and 23 ' 22 and 22 'arranged by means of which the device 20 in a schematically illustrated storage unit 21 and 21 ' is supported. The second device 20 is also available a drive unit, not shown, in operative connection, by means of which the device 20 together with the substantially by the clamping action of the clamping elements 30 or 30 'on the tubular body 25 held sleeve body (not shown) around a common horizontal longitudinal axis X in the direction of the arrow X 'can be rotatably driven.

The interior 28 of the two flanges at both ends 23, 23 'closed tubular body 25 of the device 20 essentially serves as a pressure chamber (reservoir), which after pushing on the sleeve body (not shown) by means of a pressure source shown schematically in FIG 3 for example with a gaseous medium, preferably but pressurized with compressed air in the order of 6 bar becomes. To connect the pressure source 3 is on the Pipe body 25, for example, screwed into the tube wall 27 or arranged on the one axle body 22 Check valve (not shown) is provided, which for Relieve the pressure chamber and thus to release the sleeve body preferably operated without additional aids can be. When arranging the check valve on the Axle body 22 stands over a channel system, not shown with the interior 28 of the tubular body 25 in connection. In the case of a stationary pressure source 3, this can be done via corresponding Lines 4 or 4 'on the tubular body 25 or on the provided with the channel system, not shown Axle body 22 are connected. One line 4 'can for example in a manner not shown on the Axle body 22 are attached.

3 shows the first exemplary embodiment in section as well in the longitudinal direction of the central axis Z as an exploded view shown clamping element 30 for the device 10 or 20th according to Fig.1 or Fig.2. The tensioning element 30 essentially comprises a housing 35, a pressure piece 40, an inner sleeve 45, a membrane body 55 and a compression spring 60. Die Parts of the tension member 30 are described in detail below described. The preferably cylindrical housing 35 is formed of three offset and in axial Direction oriented, cylindrical recesses 36, 37 and 38 permeated. The first recess 36 is for guiding the Pressure piece 40, which with an annular contact edge 37 ' provided second recess 37 for receiving the with the Pressure piece 40 operatively connected compression spring 60 and likewise with an annular contact edge 38 'and a contact surface 38 '' provided third recess 38 for receiving the membrane body 55 trained. The pressure piece 40 has an elongated, cylindrical guide body 41 and a molded thereon Flange 42, which is used for supporting the Guide body 41 of the pressure piece 40 circularly surrounding Compression spring 60 is provided. The end face designated with 43 of the guide body 41 can for positive and non-positive system on the inside 6 of the to be clamped Sleeve body 5 (Fig.5) with a not shown Corrugation.

The membrane body 55 designed for the lifting movement of the pressure piece 40 has a first interior 46 ″, which is formed by an outer annular side wall 46 and is provided with a shoulder 46 ′, which serves to receive the inner sleeve 45 and is delimited by an intermediate wall 48. On the outer side wall 46 there is also a ring part 50 formed in a U- shaped profile cross-section, which has an arch part 49 and two walls 49 'and 49''formed thereon at a distance from one another. The U- shaped ring part 50 is formed with the outer wall 49 'on the shoulder 46' of the outer side wall 46 and with the inner wall 49 '' in the axial direction at a distance from the curved part 49 on the intermediate wall 48 arranged transversely to the outer side wall 46 that on the side opposite the first interior 46 ″ a chamber 47 is provided which is open to the outside.

Fig. 4 shows that in the assembled state and in section illustrated clamping element 30 and the housing 35 can be seen, that with the guide body 41 in the first cylindrical Recess 36 guided pressure piece 40, as well as on the Flange 42 of the pressure piece 40 and on the annular contact edge 37 'of the second recess 37 supported compression spring 60. The membrane body 55 is with the side wall 46 in the third recess 38 is arranged and is used by the and correspondingly dimensioned inner sleeve 45 against the inner wall 38 ″ is held pressed in the housing 35. The Pressure piece 40 is correspondingly on the intermediate wall 48 of the diaphragm body 55 applied pressure P counter the restoring force of the compression spring 60 according to the direction of the arrow Z 'in the axial direction outwards and with a corresponding one Pressure relief through the restoring force of the compression spring 60 in the arrow direction Z '' back to the starting position (Fig. 4) emotional. The movement of the. Oriented in the axial direction Z ' Pressure piece 40 is through the annular contact edge 38 ' stop limited in the housing 35.

In Figure 5, the device 10 is in section along the line V-V in Fig. 1 and on a larger scale and one recognizes the tubular body 15 with those penetrating the tubular wall 17 Bores 16 or threaded bores (not shown) for the clamping elements 30 or 30 '. In the case of Fig. 3 illustrated embodiment are three in the circumferential direction distributed on the tubular body 15 clamping elements 30 or 30 'is provided, which of the present in the interior 18 Pressure is applied in such a way that one in each Clamping element 30 or 30 ′ arranged pressure piece 40 or 40 'pushed radially outwards and against the inner wall 6 of the sleeve body 5 to be clamped is pressed. The number arranged in the circumferential direction on the tubular body 15 Clamping elements 30 or 30 'is essentially dependent on the inner diameter of the sleeve body 5 to be clamped.

At this point it is pointed out that the on the Tubular body 15 or 25 arranged clamping elements 30 or 30 ' in the axial direction and in the circumferential direction of the tubular body can be arranged arbitrarily distributed to each other. At the clamping elements are a preferred embodiment 30 or 30 ', preferably on the tubular body 15 or 25 arranged so that they are spaced in the axial direction are that oriented in a direction transverse to the longitudinal axis X. Section plane of the respective tubular body 15 or 25, as in 1 and 2, only one clamping element 30 or 30 'is arranged. By arranging the necessary Through holes 16 becomes the stability of the tubular body 15 largely retained.

6 shows a second exemplary embodiment of the tensioning element 30 'shown in a schematic view and one recognizes a housing designated 35', the pressure piece 40 'arranged therein which is displaceable in the axial direction, and the membrane body 55' arranged at the other end of the housing 35 'with the U- shaped ring part 50 '. In a variant of the embodiment shown in FIG. 4, in the variant shown in FIG. 6, the housing 35 for screwing into the tube wall 17 or 27 of the tube body 15 or 25 (FIG. 1, 2) with an external thread piece 33 and with a provided conical paragraph 34. The conical shoulder 34 is designed in such a way that it effects an optimal sealing of the clamping element 30 'screwed into the tubular body 15 or 25. In a further variant, the guide body 41 'of the pressure piece 40' can have a cambered end face 43 'at the end protruding from the housing 35' for better contact and positive and non-positive connection with the inner wall 6 of the sleeve body 5 (FIG. 5). be provided.

The on the housing 35 or 35 'of the clamping element 30 or 30' arranged membrane body 55 is preferably made of an elastic deformable material, for example hard rubber, Made of plastic or the like.

The existing or required pressure in the Pressure chamber 18 or 28 is preferably provided by a pressure gauge 8 or 8 'is displayed, which is in a clearly visible place of the tubular body 15 or 25 is arranged and attached. At the first embodiment (Fig.1), the pressure gauge 8 or 8 ', for example on the end face of the flange 12 and in the second embodiment (Fig.2) the free end of the tubular body 25 may be arranged.

The clamping elements 30 or 30 'described above are preferably sealing in the tube wall 17 or 27 of the tube body 15 or 25 pressed or screwed in.

The invention is not based on the exemplary embodiments described above limited so that more appropriate Configurations without the basic idea, but especially the Training and use of the as a pressure reservoir and support element provided tubular body 15 or 25 and the arrangement and formation of the individual clamping element 30 or 30 ' leaving the invention are also possible.

Claims (12)

Device for clamping a sleeve body arranged for winding and / or unwinding flat material webs on a tubular body, which is operatively connected by the clamping action of at least one clamping element that can be brought into engagement with the hollow cylindrical tubular body rotatably driven about a longitudinal axis, characterized in that the interior ( 18; 28) of the tubular body (15; 25) is designed as a self-contained pressure chamber to be charged with a gaseous medium and on the tubular body (15; 25) several clamping elements (30; 30 ') distributed in the axial and circumferential direction. are arranged, which are inserted into the tube wall (17; 27) and are each provided with a pressure piece (40; 40 ') which is acted upon by the pressure in the interior (18; 28) and can be moved radially outwards with the inner wall (6) of the sleeve body (5) to be clamped into engagement and releasing the sleeve body (5) when pressure is released is traceable. Apparatus according to claim 1, characterized in that the clamping elements (30; 30 ') distributed on the tubular body (15; 25) in the circumferential direction are arranged at a distance from one another in the axial direction in such a way that in a sectional plane of the transverse to the longitudinal axis (X) Pipe body (15; 25) only one clamping element (30; 30 ') is arranged. Device according to claims 1 and 2, characterized in that the clamping elements (30; 30 ') in the circumferential direction and in the axial direction are each arranged at equal distances from one another on the tubular body (15; 25). Device according to claims 1 to 3, characterized in that the clamping elements (30; 30 ') are arranged sealingly in the tube wall (17; 27) of the tube body (15; 25) by a press-in or screw connection. Device according to claim 1, characterized in that the individual tensioning element (30; 30 ') has a housing (35; 35') and a pressure piece (40; 40 ') which can be displaced therein against the restoring force of a compression spring (60) Pressurization with respect to the longitudinal axis of the tubular body (15; 25) can be displaced radially outwards with the end face (43; 43 ') facing the inner wall (6) of the sleeve body (5) to be clamped and can be brought back into the starting position when pressure is released is traceable. Device according to claims 1 and 5 , characterized in that the pressure piece (40; 40 ') with a protruding into the interior (18; 28) of the tubular body (15; 25) and in a recess (38) of the housing (35; 35 ') held diaphragm body (55; 55') is operatively connected in such a way that when the same is pressurized sufficiently, the pressure piece (40; 40 ') can be moved radially outwards with respect to the longitudinal axis of the tubular body (15; 25) with that of the inner wall (6 ) of the sleeve body (5) facing the end face (43; 43 ') can be positively engaged and can be returned to the starting position when the membrane body (55; 55') is relieved of pressure. Device according to claims 5 and 6, characterized in that the pressure piece (40; 40 ') with a cylindrical guide piece (41; 41') in the housing (35; 35 ') against the restoring force of the compression spring (60) and the resiliently deformable membrane body (55) with respect to the longitudinal axis (X) of the tubular body (15; 25) by a flange (42) arranged on the pressure piece (40, 40 ') and by a contact edge provided in the housing (35, 35') 38 ') can be adjusted radially outwards with limited stops and can be returned to the starting position. Device according to claims 5 and 6, characterized in that the end face (43; 43 ') facing the sleeve body (5) to be clamped is provided with a corrugation or is convex. That the membrane body (55; 55 ') according to claim 6, characterized in that a with a bow part (49) and an outer and inner circular leg (49'; 49 '') has shaped design in profile cross-section U-ring part (50) , on which an intermediate base (48) which is oriented approximately transversely thereto and at a distance from the arch part (49) and on the outer leg (49 ') an annular side wall (46) are formed on the inner leg (49''). Device according to claims 6 to 7, characterized in that the membrane body (55; 55 ') in the housing (35; 35') by an inner sleeve (45) pressing the annular side wall (46) against the inner wall (38 '') is held clamped. Device according to claims 8 and 9, characterized in that the membrane body (55; 55 ') is made of an elastically deformable material, for example hard rubber, plastic or the like, and is formed in one piece. Device according to claim 1, characterized in that at least one pressure measuring device (8; 8 ') connected to the pressure chamber (18; 28) is arranged on the tubular body (15; 25').

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