Sheet takeout device

US20080296829A1Inactive Publication Date: 2008-12-04KK TOSHIBA

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  • Sheet takeout device
  • Sheet takeout device
  • Sheet takeout device

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Experimental program
Comparison scheme
Effect test

first embodiment

[0038]FIG. 1 shows a schematic plan view of a sheet takeout device 1 according to the present invention (hereinafter simply referred to as a takeout device 1). FIG. 2 is an enlarged view of a suction port 3 in a takeout roller 2 incorporated in the takeout device 1. FIG. 3 is an example of a velocity diagram showing a speed at which the takeout roller 2 is intermittently rotated.

[0039]As shown in FIG. 1, the takeout device 1 has a loading section 12 on which a plurality of collected sheets P such as mail or bills which are to be processed are loaded in an upright position, a supply mechanism (not shown) which moves the loaded sheets P in a collecting direction (the direction of arrow F in FIG. 1) and which feeds a first sheet P1 located at a moving-direction leading end of the sheets P, to a takeout position, a takeout mechanism 10 that takes out the sheet P1 fed to the takeout position, in a surface direction (the direction of arrow T in FIG. 1), a separating mechanism 16 that appl...

fourth embodiment

[0085]For example, FIG. 15(a) is a schematic plan view of an essential part of a takeout mechanism 40 according to the present invention corresponding to the takeout mechanism 10 according to the present embodiment, described above, in which the takeout roller 2 is replaced with a takeout belt 42. FIG. 15(b) is a side view of the essential part of the takeout mechanism 40 as viewed from the takeout position. The takeout belt 42 is wound and extended around a plurality of rollers 41 and is allowed to travel endlessly along the sheet P located at the takeout position. A negative pressure chamber 44 is located opposite the sheet P located at the takeout position, across the takeout belt, that is, the negative pressure chamber 44 is located inside the takeout belt 42. The negative pressure chamber 44 is fixedly mounted with an opening 46 facing the takeout position.

[0086]A suction port 48 is formed in the takeout belt 42 and passes by the opening 46 in the negative pressure chamber 44 w...

sixth embodiment

[0092]FIG. 21 shows a variation of the sixth embodiment, described above. This takeout mechanism 60′ has a suction port 67 with a large number of holes with different aperture areas instead of the triangular suction port 63 in the takeout mechanism 60, described above. The takeout mechanism 60′ can function similarly to the takeout mechanism described with reference to FIG. 13 and exert effects similar to those of the takeout mechanism described with reference to FIG. 13.

[0093]As described above, even if the takeout belt is used as a rotating member that contacts the sheet P located at the takeout position, effects can be exerted which are similar to those exerted when the takeout roller is used. The takeout timing for the sheet P can be prevented from deviating, enabling the pitches or gaps between the sheets P to be stabilized. The sheet P can also be prevented from being stained or damaged as a result of a difference in speed between the belt and the sheet P.

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Abstract

A sheet takeout mechanism has a takeout roller that rotates in contact with a sheet located at a takeout position, and a motor that intermittently rotates the takeout roller. A triangular suction port is formed on a suction surface of the takeout roller and has a vertex located downstream in a rotation direction of the takeout roller. When a negative pressure is exerted on the sheet via the suction port, the suction force is weak at the beginning of suction and then increases gradually.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2007-147107, filed Jun. 1, 2007, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a sheet takeout device which sucks and contacts a sheet resting at a takeout position and which then rotates to take out the sheet in a surface direction.[0004]2. Description of the Related Art[0005]A sheet takeout device is conventionally known which exerts a negative pressure on one of a plurality of sheets located at a takeout position, via a belt hole in an endless takeout belt to suck and contact the sheet and which then allows the takeout belt to travel intermittently in a takeout direction to take out the sheet onto a conveying path (see, for example, Japanese patent No. 3735565).[0006]In addition to the takeout chamber, this device...

Claims

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Application Information

Patent Timeline
04 Dec 2008
Publication
US20080296829A1
IPC
B65H3/12
CPC
B65H3/10
Inventors
ASARI, YUKIO; NARUOKA, YOSHIHIKO