Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H23/00—Registering, tensioning, smoothing or guiding webs
  • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
  • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H23/00—Registering, tensioning, smoothing or guiding webs
  • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
  • B65H23/32—Arrangements for turning or reversing webs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2406/00—Means using fluid
  • B65H2406/10—Means using fluid made only for exhausting gaseous medium
  • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
  • B65H2406/111—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar
  • B65H2406/1115—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar pivoting around an axis perpendicular to the axis of the guided material

Definitions

• the invention relates to a turning device according to the preamble of claims 1 or 2.
• turning bar apparatuses In order to be able to process material webs that are fed from two diametrically opposite directions in a single downstream machine, or to be able to feed paper webs that come from the same direction to two different machines for further processing, turning bar apparatuses have been developed in which the turning bars are movable between two working positions, each of which causes the material web to be deflected by 90 ° in opposite directions.
• Such a turning bar apparatus is known from DE 43 11 438 C2. It comprises a plurality of turning bars, each of which is articulated at its two longitudinal ends with support spindles of a frame and can be displaced along these support spindles.
• the turning bars can assume two working positions, in which they each extend at an angle of 45 ° to the support spindles.
• the turning bars can each be transferred from one of their two working positions to the other by a pivoting movement of 90 ° in the plane defined by the axes of the support spindles and the turning bars. This transfer runs through an intermediate position in which the turning bars are perpendicular to the support spindles.
• the support spindles coupled to the movement of the turning bars, must be movable perpendicular to each other.
• turning bar apparatuses in which the turning bars are known a 180 ° rotation about an axis parallel to the plane defined by the axes of the support spindles and the turning bars can be switched from one working position to the other.
• a turning bar arrangement requires sufficient space above or below this level in order to be able to carry out the switching movement.
• DE 2920684 A1 discloses a linear actuator for pivoting a turning bar.
• DE 31 27 872 C2 describes a turning bar whose first end is articulated with a frame and whose second end is slidably mounted in a guide. Compressed air is supplied through a joint and the guides can be adjusted using linear drives and secured using clamping devices.
• the invention has for its object to provide a turning device with a simple and safe pivoting turning bar.
• An advantage that can be achieved with the invention is, in particular, that the mechanical structure of the turning device is simplified, since an articulated connection of the second longitudinal end of the turning bar to the frame is eliminated. There is therefore no need for a second support spindle or means for controlling its movement.
• the passage of the compressed air supply line through the joint connecting the turning bar to the frame allows an extremely compact construction, particularly in the vertical direction;
• the turning bar is used to deflect material webs of varying width, it is desirable to extend the surface area of the To be able to limit the jacket of the turning bar on which blown air emerges to form an air cushion under the material web to be deflected, to the width of the material web.
• at least one piston which axially delimits the compressed air-fed interior, is preferably axially displaceable in the turning bar.
• This actuator can, for. B. have the shape of a knurled wheel or a crank for rotating a threaded rod which extends in the longitudinal direction through the turning rod and the thread meshes with a threaded bore of the piston.
• the closing body which serves to selectively close a group of holes in the jacket of the turning bar, is preferably designed as a hollow cylinder, the at least one piston being displaceable within the hollow cylinder. This arrangement makes it possible to move the closing body and the at least one piston independently of one another.
• the at least one piston is arranged on the longitudinal end of the turning bar connected to the joint, it is necessary to supply the compressed air with which the interior of the turning bar is fed through this piston.
• a section of the compressed air supply line is formed in the interior of the turning bar as a pipe section, which crosses the piston.
• the frame has two stops for fixing the end positions of the freedom of pivoting movement, which are preferably adjustable.
• At least one fixing device is expediently provided for fixing the turning bar in an end position of the freedom of pivoting movement.
• This fixing device expediently comprises a bolt connected to the frame for engaging on a projection of the turning bar.
• the bolt can be pivoted about an axis perpendicular to the longitudinal axis of the turning bar.
• the closing body which is provided for the selective closing of a group of holes in the casing, is preferably rotatable about the longitudinal axis of the turning bar between its two positions. This feature allows an increased stroke of the movement of the closing body in comparison with the axial displaceability of the closing body known from DE 43 11 438 C2, so that the requirements for the positional accuracy of the holes in the casing and in the closing body can be relatively low.
• a linear actuator in particular a pneumatic cylinder, can be provided for driving the pivoting movement.
• Figure 1 is a partially sectioned plan view of the base region of the turning bar, which is articulated to the frame.
• FIG. 2 shows a section along the line A - A from FIG. 1;
• 3 shows a plan view of the free end region of the turning bar; 4 shows a section along the line BB from FIG. 1;
• FIG. 5 shows a plan view of a turning bar according to a second embodiment of the invention.
• Fig. 6 is a plan view of a fixing device according to a third embodiment of the invention.
• Fig. 1 shows a top view and partially in section of a part of the frame of the turning device and an end portion of the turning bar 01 mounted thereon, which is to be referred to here as the base region.
• the frame comprises two supporting spindles 21 which are fixedly and parallel mounted in a frame (not shown) and a threaded spindle 22 which is rotatably mounted between them.
• a sliding body 23, e.g. B. a sliding block 23 is carried by the support spindles 21 and by means of a split nut 24 which is in engagement with the threaded spindle 22, by rotating the threaded spindle 22 in the longitudinal direction.
• a turning bar 01 is connected at one longitudinal end via a joint 26 to the sliding block 23 about a vertical axis perpendicular to the plane of FIG. 1 with a freedom of movement of 90 ° between two working positions.
• 1 shows the turning bar 01 in a "right” working position, the second, "left” working position is indicated by a dash-dotted outline.
• the joint 26 comprises a flat cylindrical body 27 which is fixedly connected to the longitudinal end of the turning bar 01 and which has cylindrical extensions 28 with a smaller one in both directions along the pivot axis Diameter than that of the body 27 is extended. These extensions 28 are rotatably held in a bore of the sliding block 23.
• a bore 29 extends in the plane of FIG. 1 centrally through the flat cylindrical Body 27. It connects a chamber 31 formed in the sliding block 23 to a tube section 06 which extends along the longitudinal axis of the turning bar 01 to approximately in the middle thereof.
• the sliding block 23 is also provided with a connecting piece 32 for connection to a compressed air line, so that compressed air can be applied to the inside of the turning bar 01 via the connecting piece 32, the chamber 31, the bore 29 and the pipe section 06.
• the turning bar 01 has a cylindrical jacket 02 which is provided with uniformly distributed holes 08 over its entire circumference and apart from short pieces at the longitudinal ends over its entire axial length.
• a closing body 03 in the form of a hollow cylinder 03 bears against the inner wall of the casing 02 and can be rotated about the longitudinal axis of the turning bar 01.
• the closing body 03 is provided with holes 04 on one half of its circumference, the other half of its circumference is closed.
• the holes 04 of the closing body 03 are aligned with a first group of the holes 08 of the casing 02, which is located on a side of the casing 02 facing away from the support spindles 21 (in FIG.
• the closing body 03 When adjusting the turning bar 01 from one working position to the other, the closing body 03 preferably rotates through 180 °, so that the group of Holes 04; 08, which are open in one working position of the turning bar 01, is in the other working position opposite the closed half of the circumference of the closing body 03, while the holes 08 of the other group are then aligned with the holes 04 of the closing body 03.
• Such coupling of the rotation of the closing body 03 to the adjustment of the turning bar 01 can, for. B. with the help of a (not shown) fixed ring gear on the joint 26 which meshes with an external toothing of the closing body 03.
• a first threaded spindle 07 extends from the free end of the turning bar 01 shown in FIG. 3 in its interior to in the immediate vicinity of the end shown in FIG. 1 connected to the joint 26.
• the first threaded spindle 07 is arranged off the longitudinal axis and extends outside the pipe section 06 parallel to the latter. Their thread is in engagement with an internal thread of a first piston 09, which is displaceable in the axial direction of the turning rod 01 by rotating the first threaded spindle 07.
• an actuator 10 z. B. a nut 10 rotatably attached, the z. B. is rotatable with the help of an attached key.
• the side surfaces of the first piston 09 lie close to the inner surface of the hollow cylindrical closing body 03.
• the two pistons 09; 11 each form a limitation in the axial direction of the interior 13 of the turning bar 01 that can be pressurized with compressed air via the pipe section 06.
• edges of the pistons 09; 11 each follow the course of an edge 14 of a material web wound around the turning bar 01, ie they essentially have the course of two each by half Piston-extending helical sections of opposite handedness.
• the sliding block 23 carries two arms 16 projecting at an angle of 90 ° to one another, at the ends of which a stop 17 is mounted, which has a concave side 18 shown in FIG. 2 and facing the turning bar 01.
• the two stops 17 limit the freedom of pivoting of the turning bar 01 in the joint 26 to exactly 90 °.
• An adjustment mechanism for adjusting the position of the stop 17 parallel to the direction of the line AA can be provided for a fine adjustment of the adjustment positions or the freedom of pivoting movement.
• the turning bar 01 has projections 33 on two opposite sides, each of which has an inclined surface 34 facing the jacket 02 of the turning bar 01.
• a shaft 36 rotatably mounted in each arm 16 carries at one end facing away from the turning bar 01 a square extension 37 onto which a corresponding key for pivoting the shaft 36 can be attached.
• the shaft 36 carries a bolt 38, which is shown on the left arm 16 of the sliding block 23 and on the right arm 16 in each case in positions pivoted by 90 ° with respect to one another.
• the latch 38 of the right arm 16 engages behind the inclined surface 34 of the projection 33 and thus holds the turning bar 01 pressed against the right stop 17.
• the latch 38 in turn has an inclined surface which, in the locked state, presses against the inclined surface 34 of the projection 33.
• the oblique course of these inclined surfaces 34 ensures that when the turning bar 01 is fixed to the stop 17 by pivoting the bolt 38 from the vertical position shown on the bolt 38 of the left arm 16 into the horizontal position, the bolt 38 is already behind the projection 33 can intervene before the turning bar 01 rests directly on the stop 17 and that the locking is free of play.
• Fig. 5 shows a plan view of a turning device according to a second Embodiment of the invention.
• the turning bar 01 shown completely here, the sliding block 23 and the supporting spindle 21 and threaded spindle 22 carrying it are the same as described above with reference to FIGS. 1 to 4.
• the sliding block 23 also carries a left and a right stop 17 to limit the freedom of pivoting movement of the turning bar 01.
• the housing of a linear actuator 41, for. B. double-acting pneumatic cylinder 41 suspended.
• the suspension acts on that end of the cylinder 41 at which a piston rod 42 also emerges from the housing.
• the piston rod 42 is in turn articulated to the turning rod 01.
• the turning bar 01 is adjustable between its working positions on one of the two stops 17; by locking the piston rod 42, it can be held immovably in one of these working positions.
• This configuration enables the turning bar 01 to be switched remotely between its two working positions without the need for direct access by an operator to the turning bar.
• FIG. 6 shows a section of a turning device according to a third embodiment of the invention.
• the turning bar 01, the projections 33, the joint 26 and the sliding block 23 are the same as described with reference to FIGS. 1 to 4.
• Only one arm 16 is shown in FIG. 6, there is a second arm arranged symmetrically to it.
• the arm 16 carries a linear actuator 43 which can be operated electromagnetically or which, as in the case of FIG. 5, can be a pneumatic cylinder 41.
• the linear actuator 43 slidably carries a bolt 38 parallel to the longitudinal axis of the turning bar 01.
• the bolt 38 has two inclined surfaces 44; 46, of which one inclined surface 44 is aligned parallel to the inclined surface 34 of the projection 33 and the other inclined surface 46 extends almost perpendicular to the direction of movement of the bolt 38.

Landscapes

• Actuator (AREA)
• Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
• Confectionery (AREA)
• Power Steering Mechanism (AREA)
• Vehicle Body Suspensions (AREA)
• Turning (AREA)
• Manipulator (AREA)
• Preliminary Treatment Of Fibers (AREA)
• Replacement Of Web Rolls (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7689828

Family Applications (1)

Country Status (7)

Families Citing this family (7)

Family Cites Families (18)

• 2001
  • 2001-06-28 DE DE10131272A patent/DE10131272B4/de not_active Expired - Fee Related
• 2002
  • 2002-06-17 AT AT02748589T patent/ATE425933T1/de not_active IP Right Cessation
  • 2002-06-17 EP EP02748589A patent/EP1414727B1/fr not_active Expired - Lifetime
  • 2002-06-17 US US10/480,645 patent/US7275709B2/en not_active Expired - Fee Related
  • 2002-06-17 WO PCT/DE2002/002199 patent/WO2003002440A2/fr active Application Filing
  • 2002-06-17 AU AU2002319087A patent/AU2002319087A1/en not_active Abandoned
  • 2002-06-17 JP JP2003508634A patent/JP3980553B2/ja not_active Expired - Fee Related
  • 2002-06-17 DE DE50213369T patent/DE50213369D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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