JP2007326683A - Paper feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a conveyed printed paper sheet from becoming dirty and a paper sheet from being damaged. <P>SOLUTION: A paper separating member 60 for separating a paper sheet S1 conveyed by a conveyance belt 10 from the conveyance belt 10 is provided on the upstream side of a delivery paper feeding roller 50. The paper separating member 60 uses its shaft in common as a shaft for a downstream side pulley 40, is of roller type having larger diameter than that of the downstream side pulley 40 arranged between a plurality of conveyance belts 10, and turns around the shaft. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sheet feeding device, and more particularly, to a sheet feeding device that feeds one of the uppermost layers of stacked sheets to a conveyance belt and conveys and feeds the sheet in the next process direction.

An example of the background art will be described for such a sheet feeding device with reference to the drawings.
4A and 4B are cross-sectional side views showing an example of a sheet feeding device in the background art in the order of operation.
The sheet feeding device includes a conveyance belt 10x, a suction chamber 20x that adsorbs one uppermost sheet (S1) of sheets S stacked on the conveyance belt 10x, and an upstream side that drives and controls the conveyance belt 10x. A pulley 30x and a downstream pulley 40x, and a discharge paper feed roller 50x that feeds and feeds one sheet (S1) conveyed by the conveyor belt 10x further downstream and in the next process direction, Only the discharge air chamber 70 that separates these sheets by blowing air onto the leading and upper layer portions of the stacked sheets S, and the separated uppermost sheet S1 are attracted to the conveying belt 10x and conveyed. The two-sheet feed preventing member 80 and the uppermost sheet S1 are rotated when the conveying belt 10x is adsorbed to rotate the upstream pulley 30x and the downstream pulley 40x, Driving the feed belt 10x, construction with a shielding plate 90, the controlling, and has a configuration (for example, see Patent Document 1).

When the paper is attracted to the transport belt and transported downstream, if the transport is performed while suctioning air in the suction chamber, the next paper on the top layer may also be dragged and double fed. In the example, a two-sheet feed preventing member 80 is provided to prevent this.
Further, the suction of the air is stopped after the sucked paper is added to the discharge paper feed roller so that the next paper is not sucked and conveyed from behind the sucked paper. However, even if the air suction is stopped, the negative pressure in the suction chamber is not immediately released and the suction force remains, so that the paper to be fed is not separated from the transport belt and remains in contact. May be.
JP 2002-226068 A (see FIGS. 15 and 16)

  The sheet feeding device in the background art described above adsorbs one sheet of the uppermost layer onto the conveying belt 10x, conveys it in the direction of the next process, and adds it to the discharging sheet feeding roller 50x. Although the sheet is conveyed downstream, the sheet conveyance speed does not match between the normal conveyance belt 10x and the discharge sheet feeding roller 50x. If the belt is still in contact with the conveyor belt, there is a problem in that friction due to a speed difference occurs between the paper and the belt, and the printing of the paper becomes dirty or the paper itself is damaged.

  In view of the problems in the background art described above, the problem of the present invention is that even if there is a difference in paper conveyance speed between the conveyance belt and the discharge paper feed roller, printing of the conveyed paper is not stained, Another object of the present invention is to provide a paper feeding device that can discharge and feed the paper in the next process direction in a good state without damaging the paper itself.

In order to achieve the above object, the present invention has the following configurations.
The first configuration of the present invention includes a suction chamber that sucks and sucks one of the uppermost layers of the stacked sheets to the transport belt, an upstream pulley and a downstream pulley that drive the transport belt, and the transport The paper that has been conveyed by the belt is sandwiched and further conveyed, and discharged and fed in the direction of the next process, and one of the uppermost layers of the stacked sheets is attracted to the conveying belt. In the sheet feeding device that conveys and feeds in the next process direction, the sheet that is disposed on the upstream side of the discharge sheet feeding roller and is conveyed by the conveyor belt is brought into contact with the conveyor belt. A sheet feeding device having a sheet separating member to be separated.

  According to a second configuration of the present invention, the sheet separating member is a disk shape that rotates around a downstream shaft that rotates the downstream pulley and has a larger diameter than the downstream pulley. Is a sheet feeding device.

  According to a third aspect of the present invention, the sheet separating member is a disk-shaped member that is disposed on the downstream side of the downstream pulley and rotates around one axis. It is.

  According to a fourth aspect of the present invention, there is provided the sheet feeding device characterized in that the sheet separating member is a roller type that is disposed on the downstream side of the downstream pulley and is long in the sheet conveyance path width direction.

  According to a fifth aspect of the present invention, the sheet separating member is a disk type that is disposed near the downstream pulley on the upstream side of the downstream pulley and rotates around one axis. Is a sheet feeding device.

  In the first configuration of the present invention, a sheet separating member is provided to separate the sheet conveyed by the conveying belt on the upstream side of the discharge sheet feeding roller from the conveying belt. Even if there is a difference with the discharge paper feed roller, the paper separation member can force the paper to be separated from the conveyor belt, and the print on the paper is soiled or the paper itself is damaged. Such problems can be eliminated.

  In the second configuration of the present invention, the sheet separating member shares a shaft with the downstream pulley that drives the conveyor belt, and has a roller shape with a larger diameter than the downstream pulley, so the sheet separating member has been conveyed. This roller is rotated by the paper, so that the paper can be easily separated from the conveying belt, and the same effect as the first configuration can be obtained, and the entire structure can be simplified.

  In the third configuration of the present invention, since the paper separation member is provided on the downstream side of the downstream pulley, the shape, size, etc. can be determined regardless of the structure and shape of the conveyor belt. There is also an effect.

  In the fourth configuration of the present invention, since the paper separating member is provided on the downstream side of the downstream pulley and has a roller shape that is long in the paper width direction, there is also an effect that the number of parts can be further reduced and simplified. is there.

  According to the fifth configuration of the present invention, since the sheet separating member is disposed between the upstream pulley and the downstream pulley, there is an effect that the entire sheet feeding device can be reduced in size.

  When carrying out the present invention, first, the conveying belt is divided into a plurality of pieces, and the upstream pulley and the downstream pulley for driving the conveying belt are also divided. The pulleys and the downstream pulleys are best adapted to change the overall width according to the width of the conveyed paper.

  Secondly, it is best to use a disc-shaped paper separation member between each of the divided downstream pulleys.

Next, embodiments of the present invention will be described with reference to the drawings.
1 (a) and 1 (b) are a sectional side view and a plan view of an essential part showing Embodiment 1 of the present invention.
The first embodiment is a sheet feeding device for adsorbing one sheet (S1) of the uppermost layer among the stacked sheets S to a plurality of conveying belts 10 to convey and feed in the next process direction. The suction chamber 20 that sucks one of the uppermost layers of the stacked sheets S and sucks it on the transport belt 10, and the plurality of transport belts 10 are arranged so as to sandwich the suction chamber 20 inside. The upstream pulley 30 and the downstream pulley 40 to be driven and controlled, and the suction chamber 20 sucked and adsorbed to the transport belt 10, and the paper (S 1) transported by the transport belt 10 is sandwiched and further downstream The discharge feed roller 50 that discharges and feeds in the next process direction and the plurality of downstream pulleys 40 rotate in common with the shaft, and are disposed between the plurality of downstream pulleys 40, and these downstream From side pulley 40 And a disk-shaped sheet separating member 60 that separates the sheet (S1) that is formed in the diameter and is conveyed by the conveying belt 10 from the close contact state with the conveying belt 10. .

In the first embodiment, the conveyor belt 10 is divided into a plurality of pieces, and accordingly, the plurality of downstream pulleys 40 and the shaft (downstream shaft 41) rotate in common, and the plurality of these pulleys are rotated. Since a disc-shaped paper separating member 60 is provided between the downstream pulleys 40, the paper separating member 60 rotates the disc with the paper conveyed by the conveying belt 10 to rotate the paper. It can be separated from the conveyor belt 10 without difficulty, and problems such as printing on the paper (S1) becoming dirty or damaging the paper itself can be eliminated.
In addition, since the paper separating member 60 has a disk shape sharing the shaft with the downstream pulley 40, the entire paper feeding device can be reduced in size and simplified.

2 (a) and 2 (b) are a sectional side view and a plan view of the main part showing a second embodiment of the present invention, and FIG. 2 (c) is a sheet spacing member in the second embodiment. It is a modification.
In the second embodiment, an example in which the sheet separating members 60 a and 60 b are disposed on the downstream side of the downstream pulley 40 is shown.
As described above, by disposing the sheet separating members 60a and 60b separately from the downstream pulley 40, the sheet separating members 60a and 60b can have a free shape, structure, size, and the like regardless of the structure shape of the transport belt and the driving pulley. be able to.

For example, as an example, as shown in FIG. 2C, the sheet separating member 60b may be connected to one. In addition, if it is such arrangement | positioning, the upstream pulley 30 and the downstream pulley 40 can also be made into the structure which connected each, and can also reduce a number of parts.
In FIG. 2B, the upstream pulley 30 is divided into two parts (four parts in FIGS. 1, 2A, and 2B).
Other functions and effects are the same as those of the first embodiment.

FIGS. 3A and 3B are a sectional side view and a plan view of an essential part showing a third embodiment of the present invention.
In the third embodiment, the sheet separating member 60 c is disposed near the downstream pulley 40 between the upstream pulley 30 and the downstream pulley 40. Therefore, there is an effect that the entire sheet feeding device can be reduced in size.
Other functions and effects are the same as those of the first embodiment.

It is the cross-sectional side view and principal part top view which show Example 1 of this invention. It is the cross-sectional side view and principal part top view which show Example 2 and its modification of this invention. It is the cross-sectional side view and principal part top view which show Example 3 of this invention. It is a sectional side view showing an example of background art in order of operation.

Explanation of symbols

10, 10x Conveying belt 20, 20x Suction chamber 30, 30x Upstream pulley 31 Upstream shaft 40, 40x Downstream pulley 41 Downstream shaft 50, 50x Discharge paper feed roller 60, 60a-60c Paper separation member 70 Discharge air chamber 80 Two-sheet feed prevention member 90 Shield plate

Claims (5)

A suction chamber for sucking one of the uppermost layers of the stacked sheets and sucking it on the conveyor belt;
An upstream pulley and a downstream pulley that drive the conveyor belt;
A paper feeding roller that sandwiches the paper transported by the transport belt and further transports it, and discharges and feeds it in the direction of the next process;
In a sheet feeding device that adsorbs one of the uppermost layers of the stacked sheets to the conveyance belt and conveys and feeds it in the direction of the next process, the sheet is disposed on the upstream side of the discharge sheet feeding roller. A sheet feeding device having a sheet separating member for separating the conveyed sheet from a close contact state with the conveying belt.   2. The sheet feeding device according to claim 1, wherein the sheet separating member is a disk type rotating around a downstream axis for rotating the downstream pulley and having a diameter larger than that of the downstream pulley. apparatus.   The sheet feeding device according to claim 1, wherein the sheet separating member is a disk-shaped member that is disposed on the downstream side of the downstream pulley and rotates around one axis.   The sheet feeding device according to claim 1, wherein the sheet separating member is a roller type that is disposed on the downstream side of the downstream pulley and is long in the sheet conveyance path width direction. 2. The sheet feeding device according to claim 1, wherein the sheet separating member is a disk type disposed on the upstream side of the downstream pulley and close to the downstream pulley and rotating around one axis. apparatus.

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