JP2005008404A - Paper feeding means - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper feeding means for moving a paper on the uppermost face of stacked papers onto a conveyance table without causing an obstacle. <P>SOLUTION: The paper 2 on the uppermost face sucked by a suction pad 4 is fed onto the conveyance table 8 by giving an angle to the suction pad 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper feeding means used in a printing machine, a gloss processing machine, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a printing machine and a gloss processing machine, a paper feeder that feeds out sheets to be printed or laminated one by one is arranged at the most upstream of the process.
In such a paper feeder, sheets to be printed or processed are stacked on the most upstream side of the process, and the stacked sheets on the uppermost surface are sucked up one by one by a suction pad and sent out to a conveyance path leading to a downstream process. It is.
[0003]
[Problems to be solved by the invention]
The operation of the paper feeder will be described in an easy-to-understand manner.
As shown in FIGS. 1 and 2, a plurality of sheets S are stacked on the stocker 1. A suction pad 4 is disposed on the uppermost sheet 2 of the plurality of sheets S. The suction pad 4 is connected to a pump (not shown) by a tube 3 and is provided with a rubber suction cup for sucking and sucking the uppermost sheet 2. The transport table 8 is close to the stocker 1 in the downstream process direction. Nipping rollers 5 and 5 for sending the uppermost sheet 2 moved one by one by the suction pad 4 to the downstream process (right direction) are arranged above and below the conveyance table 8. In addition, as auxiliary means for reliably transferring only one uppermost sheet 2 to the transport table 8 through a plurality of sheets, air is usually sent between the plurality of sheets (air blow), and the second and subsequent sheets. Is provided with a catching nail 6 so that it does not lift together with the uppermost sheet, or a brush 7 for scraping off the second and subsequent sheets when a plurality of sheets are accidentally lifted. These auxiliary means are not always necessary.
[0004]
As shown in FIG. 3, the uppermost sheet 2 sucked by the suction pad 4 is lifted upward, and only the uppermost sheet 2 is lifted with the help of the nail 6 and the brush 7. After that, as shown in FIG. 4, the suction pad 4 moves to the conveyance table 8 for conveyance to the downstream process on the right side, and the leading end portion of the uppermost sheet 2 is located between the nip rollers 5 and 5. As shown in FIG. 2, the uppermost sheet 2 is lowered to the upper surface of the transfer table 8 together with the suction pad 4 and is arranged at a predetermined position. Then, the upper nip roller 5 descends and sandwiches the leading end portion of the uppermost sheet 2. Subsequently, as shown in FIG. 6, the suction pad 4 that has been released from the suction rises leaving the uppermost sheet 2. The remaining uppermost sheet 2 is conveyed to the downstream process on the right side by the rotation of the nip rollers 5 and 5.
[0004]
By the way, there is no problem if the above series of operations is performed smoothly. For example, when the amount of paper is small and thin, or when the paper is weak, such as art paper or coated paper, the thin arrows in FIG. In many cases, the leading end portion of the uppermost sheet 2 may come into contact with the claw 6, the brush 7, the side surface of the conveying table 8, or the like when moving to the conveying table 8.
As a method for solving such a problem, it is conceivable that the uppermost sheet 2 is lifted and moved to a position sufficiently higher than the height of the transport table 8. However, according to this method, the operation range of the suction pad 4 and the uppermost sheet 2 that moves with the suction pad 4 is increased. Loss occurs. This causes a large reduction in work efficiency.
In view of the above problems, an object of the present invention is to provide a sheet feeding unit that can smoothly move a plurality of stacked sheets S to a transport table 8 with a small space and a short flow line.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the paper feeding means of the present invention is a paper feeding means for sucking up stacked sheets one by one from the uppermost surface and sending them to the transport table. It is characterized by being sent out to the transfer table.
An arbitrary angle may be provided on the paper receiving side of the transport table so that the transported table and the sucked paper do not come into contact with each other when the paper moves.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings.
FIG. 1 is a plan view of the sheet feeding means, and FIG. 2 is a side view thereof. 3, FIG. 4, FIG. 5 and FIG. 6 respectively show side views for explaining the principle of the sheet feeding means in an easy-to-understand manner. FIG. 7 is a side view for explaining the trouble that occurs in the conventional paper feeding means. 8 and 9 show side views of the embodiment of the present invention, respectively. 10 and 11 show side views of modifications.
In FIG. 2, the uppermost sheet 2 sucked by the suction pad 4 is lifted to a position higher than the height of the transport table 8 as shown in FIG. Then, the suction pad 9 is turned counterclockwise around the fulcrum 9 as shown in FIG. 8, and the top of the uppermost sheet 2 is lifted with respect to the traveling direction (right side in the figure). As shown in FIG. Since the leading end is lifted up, even if the uppermost sheet 2 is of a thin sheet or a weak type, it does not hit the transfer table 8 or the like. Then, as shown in FIG. 5, the paper is lowered with the uppermost sheet 2 on the conveyance table 8 in the state of turning clockwise with the fulcrum 9 as the center, and as shown in FIG. The sheet 2 is sent to the downstream process.
[0007]
There is no restriction on the position of a fulcrum or the like that changes the direction of the suction pad 4. In short, the orientation of the suction pad 4 may be changed so that the uppermost sheet 2 does not come into contact with the transport table 8, and it may be provided at a position apart from the suction pad 4.
There is no restriction on the timing when the suction pad changes its direction in the clockwise direction or the counterclockwise direction. For example, the orientation may be changed at the position shown in FIG. 3 as in the above embodiment, or the suction pad 4 may rise from the state shown in FIG. 2 while changing the orientation to the state shown in FIG. Similarly, the direction may be changed to a position directly below at the time of FIG. 4, or the suction pad 4 may be lowered from the state of FIG. 9 while changing the direction to be in the state of FIG. Further, the direction may be changed during the movement of the suction pad 4 in FIG. 3 onto the transfer table 8 in FIG. 4.
[0008]
Since the suction cup provided at the tip of the suction pad 4 is usually soft rubber, the uppermost sheet 2 may be sucked at an angle as shown in FIG. 10, and without changing the orientation in the subsequent operation. It may be moved onto the transfer table 8 to release the suction while keeping the angle and return to the original position.
Further, as shown in FIG. 11, if the uppermost sheet 2 is prevented from coming into contact with the conveying table 8 by providing an inclination on the sheet receiving side of the conveying table 8, the operation becomes smoother.
The above-described method (air blow, nail, brush, etc.) is employed so that sheets other than the uppermost sheet 2 of the plurality of sheets 1 are not simultaneously carried by the suction pad 4. If the orientation of the suction pad 4 is changed when the paper 2 is lifted from the plurality of papers 1, the operation forcibly rubs the top paper 2 against a nail or a brush. Double.
[0009]
【The invention's effect】
According to the sheet feeding unit of the present invention, it is possible to smoothly move a plurality of stacked sheets S to the transport table 8 in a narrow space and a short flow line.
That is, since the operation range of the suction pad 4 and the uppermost sheet 2 that moves with the suction pad 4 is narrow, the system can be made compact, and since the flow line is short, there is no loss of work time and work efficiency is improved.
[Brief description of the drawings]
FIG. 1 is a plan view of a paper feeding unit. FIG. 2 is a side view of the paper feeding unit.
FIG. 3 is a side view illustrating the principle of a paper feeding unit.
FIG. 4 is a side view illustrating the principle of a paper feeding unit.
FIG. 5 is a side view illustrating the principle of a paper feeding unit.
FIG. 6 is a side view illustrating the principle of a paper feeding unit.
FIG. 7 is a side view illustrating a problem that occurs in a conventional paper feeding unit.
FIG. 8 represents a side view of an embodiment of the present invention.
FIG. 9 represents a side view of an embodiment of the present invention.
FIG. 10 shows side views of modifications.
FIG. 11 is a side view of a modified example.
[Explanation of symbols]
S Multiple sheets 1 Stocker 2 Uppermost sheet 3 Tube 4 Suction pad 5 Nip roller 6 Claw 7 Brush 8 Transport table 9 Support point

Claims (2)

A sheet feeding means for picking up stacked sheets one by one from the uppermost surface and sending them to the transfer table, and feeding the sucked sheets to the transfer table at an angle in the moving direction. 2. The sheet feeding means according to claim 1, wherein an angle is provided on the conveyance table surface on the sheet receiving side.

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