Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sheet takeout device

Inactive Publication Date: 2008-12-04
KK TOSHIBA
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]An object of the present invention is to provide a sheet takeout device which can stabilize an operation of taking out a sheet and which prevents the sheet from being stained or damaged during the takeout operation.
[0011]To accomplish the object, a sheet taking-out device according to an embodiment of the present invention includes a rotating member having a suction surface which travels along a sheet fed to a takeout position and a suction port formed on the suction surface, a rotating mechanism which intermittently rotates the rotating member so as to minimize a rotation speed at a timing when the suction port passes by a suction position where the suction port sucks the sheet located at the takeout position, a suction mechanism which allows the suction surface to generate a negative pressure via the suction port so that the sheet located at the takeout position is sucked by and contacted with the suction surface when the suction port passes by the suction position, and suction force adjusting means which adjusts a suction force applied to the sheet located at the takeout position via the suction port so as to prevent the sheet from being sucked and moved by the suction surface while the suction port is approaching the suction position with the rotation speed of the rotating member reduced.
[0012]According to the present invention, while the suction port is approaching the sheet located at the takeout position with the rotation speed of the rotating member reduced and when there is a relatively significant difference in speed between the suction port and the sheet, the suction force applied to the sheet via the suction port is adjusted so as to prevent the sheet from being sucked and moved by the suction surface. This makes it possible to prevent a suction force strong enough to move the sheet located at the takeout position from being applied to the sheet before the suction port stands opposite the sheet. Furthermore, a sheet suction timing can be fixed to allow a sheet takeout timing to be stabilized.
[0013]Additionally, according to the present invention, the suction force is adjusted so as to prevent a strong suction force from being applied to the sheet via the suction port while a difference in speed remains between the suction port and the sheet. The sheet is thus prevented from being sucked by and contacted with the suction surface of the rotating member being decelerated. This makes it possible to prevent a possible slip between the suction surface and the sheet, which come into contact with each other, and to prevent the sheet from being disadvantageously stained or damaged by friction during the takeout operation.

Problems solved by technology

After the taken-out sheet is delivered to a downstream conveying mechanism, the suction force applied to the sheet by the takeout belt is weakened.
However, this conventional device exerts a negative pressure on the sheet resting at the takeout position, via the belt hole in the intermittently driven takeout belt.
Consequently, friction occurs between the belt and the sheet, which may disadvantageously stain or damage the sheet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sheet takeout device
  • Sheet takeout device
  • Sheet takeout device

Examples

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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B65H3/12
CPCB65H3/10
Inventor ASARI, YUKIONARUOKA, YOSHIHIKO
Owner KK TOSHIBA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com