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
  • B65H16/00—Unwinding, paying-out webs
  • B65H16/10—Arrangements for effecting positive rotation of web roll
  • B65H16/106—Arrangements for effecting positive rotation of web roll in which power is applied to web roll
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H18/00—Winding webs
  • B65H18/08—Web-winding mechanisms
  • B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
  • B65H18/22—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web by friction band
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/41—Winding, unwinding
  • B65H2301/414—Winding
  • B65H2301/4143—Performing winding process
  • B65H2301/41432—Performing winding process special features of winding process
  • B65H2301/414327—Performing winding process special features of winding process winding on core irregular inner or outer longitudinal profile, e.g. stepped or grooved

Definitions

• the present invention relates to a device for winding and / or unwinding a film at constant speed. It applies in particular, but not exclusively, to a film in an optoelectronic device such as a scanning analysis device ("scanning").
• a roller or a reel driven by a motor is used.
• the film has a curved shape. Therefore, the winding of the film on a cylindrical surface requires a significant resistance force so that the film is pressed against the cylindrical surface of the roller. This tension therefore generates a risk of degradation of the film. In addition, as soon as the resistant force disappears, the winding present on the roller tends to swell and unwind with all the drawbacks that this implies.
• the film drive must be uniform over its entire width and must lead to a constant running speed independent of the thickness of the winding present on the reel. he turns out that such a result can only be obtained by means of cylindrical coils driven by a motor by means of the use of complex and costly arrangements (variation of the drive speed of the roller as a function of the thickness of the winding ).
• rollers or cylindrical coils to drive the film creates the risk of scratches or deterioration (by friction) of the useful part of the film.
• the object of the invention is therefore more particularly to eliminate these drawbacks and to solve these problems:
• a reel comprising two coaxial annular bearing zones of the same diameter separated from one another by a concavity and spaced from each other by a distance slightly less than the width of the film, these two zones d '' support pivot freely,
• guiding means designed so as to guide the film laterally in order to bring it onto the reel so that the lateral edges of the film come to bear respectively on the two bearing zones of the reel,
• the bearing zones can be integral with one another or even independent from one another in rotation.
• said belts driven by a motor, advance the film at a constant linear speed and ensure the winding of the film on the reel regardless of the thickness of the winding.
• This device avoids any risk of deterioration for the reasons mentioned above, unlike conventional devices.
• Figure 1 is an elevational view showing the layout of the various components of the device for guiding, driving and winding a film
• Figure 2 shows the section along AA of Figure 1;
• FIG. 3 is a partial perspective view of FIG. 1.
• the structure of the device comprises two parallel metal plates 1a, 1b separated by three spacers 2a, 2b, 2c arranged along the upper side of the plates. These various elements constitute a rigid assembly constituting the device for guiding, driving and winding the film 3.
• the distance between the two metal plates 1a, 1b is slightly greater than the width of the film 3 to be analyzed.
• the device comprises means for guiding, driving and winding the film.
• the film guiding device 3 comprises in a shooting area two parallel coaxial rollers 4a, 4b, of which only the roller 4a is shown, rotatably mounted by means of ball bearings and held by a pair of against plates 5a, 5b, 6a, 6b, of which only against plates 5a and 6a are shown.
• the lateral edges of the film 3 come to bear respectively on these two rollers along an arc of a circle so that the film follows a circular trajectory.
• this circular trajectory it has a cylindrical shape, with a straight generator. This position makes it possible to obtain in the shooting zone a rectilinear transverse zone to the right of which is a slot made in a plate 7 secured to the two plates forming a rectangular space for the routing of the light rays passing through the film. .
• the film drive device 3 comprises two belts 8a, 8b, of which only the belt 8a is shown, which run synchronously and which respectively come to bear on the lateral edges of the film 3 at the level of the circular path. This produces a friction drive of the two lateral edges of the film which eliminates any possibility of speed variation between these two edges.
• the two belts 8a, 8b have, on the side opposite the film 3, notches; the belts are driven by means of two coaxial toothed pulleys 9a and 9b mounted on an axis 10 and driven by an electric motor 11 and free toothed pulleys, of which only the pulley 12a is shown.
• the tension and positioning of the two belts 8a, 8b are ensured by two sets of rollers, of which only the set 13a, 13b, 13c is shown.
• the film winding device 3 consists of a diabolo-shaped reel 14 having a concave shape of revolution situated between its two edges.
• the dolly 14 is rotatably mounted along an axis 15 parallel to the axis of the rollers 4a, 4b with spring return. This axis is guided so as to be able to move along an oblong hole 16 as a function of the thickness of the winding of the film 3 on the diabolo 14.
• the main axis of the oblong hole 16 is oriented eg endicularly to the plane tangent of application of the belts on the edges of the film (application force collinear with the main axis oblong hole 16).
• the arms 17a, 17b, of which only the arm 17a is shown, are articulated around the axis O and are intended to press the film 3 at the side edges, and this, independently of the level of winding of the film 3 on the dolly 14, the volume of the winding zone of the film therefore evolves as a function of the length of the film wound on the diabolo.
• the arms 18a, 18b, of which only the arm 18a is shown, are intended to guide the film 3 during its introduction or its extraction.
• the angular speed of the dolly which does not have its own drive means, depends on the level of winding of the film 3.
• the film 3 is wound on the dolly 14 without friction or tension .

Landscapes

• Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
• Winding Of Webs (AREA)
• Storage Of Web-Like Or Filamentary Materials (AREA)
• Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=27619966

Family Applications (1)

Country Status (6)

Family Cites Families (9)

• 2002
  • 2002-02-05 FR FR0201453A patent/FR2835514B1/fr not_active Expired - Lifetime
• 2003
  • 2003-02-05 WO PCT/FR2003/000365 patent/WO2003066491A1/fr not_active Application Discontinuation
  • 2003-02-05 JP JP2003565881A patent/JP2005516869A/ja not_active Withdrawn
  • 2003-02-05 AU AU2003214350A patent/AU2003214350A1/en not_active Abandoned
  • 2003-02-05 EP EP03709920A patent/EP1472166A1/de not_active Withdrawn
• 2004
  • 2004-07-09 US US10/888,490 patent/US20040238680A1/en not_active Abandoned

Non-Patent Citations (1)

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