JPH0262332A - Automatic sheet feeding device - Google Patents

Abstract

PURPOSE:To ensure feeding of a form by having an impeller which is provided with an elastic vane that is extended longer to the outside than an outer diameter of a sheet feeding roller supported on a sheet feeding roller shaft, and by making the impeller rotate within limited angle to the sheet feeding roller shaft. CONSTITUTION:A form board 2 being almost horizontal, the force such as that by which a form edge 1a is pressed to a sheet feeding roller 3 is not actuated in a form 1, and the form edge 1a is in a condition where it slightly touches the sheet feeding roller 3 or it is away from the sheet feeding roller. Hence, even when the sheet feeding roller 3 is rotated in the direction indicated by an arrow A, it can not bite a form with a separated piece, and sometimes sheet feeding can not be performed. When a sheet feeding roller shaft 4 is rotated in the direction indicated by an arrow A, however, an impeller 8 is also rotated in the same direction by means of the engagement of a projection 12 with a boss 11. A vane 9 of the impeller 8 being moved rubbing the upper surface of the form edge 1a, the form 1 is extended in the direction indicated by an arrow B, and the form edge 1a is thus supplied to a contact part of the sheet feeding roller 3 and a separated piece 5. In this way, the performance of sheet feeding is ensured constantly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic paper feeding device for feeding cut sheets of paper such as manuscripts and recording paper one by one in facsimiles, copying machines, and the like.

2. Description of the Related Art Conventionally, this type of device consists of a paper table on which a plurality of stacked sheets of paper such as original documents are placed, a paper feed roller that engages with the leading edge of the paper set on the paper table and feeds out the paper, and a paper feed roller that feeds the paper. It has a separating means such as a separating piece that cooperates with the paper roller to prevent the feeding of multiple sheets of paper, and the paper feeding roller and the separating means cooperate to separate the sheets of paper on the paper tray one by one. , was rolling out.

In order to reliably feed the paper, it is necessary to make the leading edge of the paper get caught between the paper feed roller and the separation means.For this reason, the paper table is usually tilted, and the paper's own weight is used to The leading end was caught between the paper feed roller and the separating means. As an alternative to this, the paper table is arranged horizontally, and an introduction roller is provided that contacts the paper from above and below so as to sandwich it, and this introduction roller feeds the paper toward the paper feed roller. things are also used.

Problems to be Solved by the Invention However, all of these conventional configurations have had problems. In other words, in the case of a type in which the paper table is tilted, there is a problem that the height of the entire device increases because the paper table extends upward; The problem is that the device becomes complicated and expensive.

The present invention was made in view of the above-mentioned problems, and uses a relatively simple mechanism to reliably feed paper on a paper table to the paper feed roller without increasing the height of the entire device. The purpose of the present invention is to provide an automatic paper feeding device that enables easy paper feeding.

Means for Solving the Problems The present invention solves the above-mentioned problems by arranging the paper table on which the paper is placed almost horizontally to prevent the height of the device from increasing, and furthermore, by arranging the paper table on which the paper is placed almost horizontally, and by placing the paper on the paper table. In order to reliably feed the loaded paper to the paper feed roller, an impeller with flexible blades that extends beyond the outer diameter of the paper feed roller is held on the paper feed roller shaft that holds the paper feed roller. This impeller is configured to be rotatable within a limited angle with respect to the paper feed roller axis.

Function Since the present invention has the above-described configuration, when the paper feed roller rotates, the impeller rotates at the same time, and its flexible blades contact the paper on the paper table and pull it in, thereby removing the leading edge of the paper. is reliably fed between the paper feed roller and the separation means. As a result, the paper feeding roller and the separating means separate and feed the paper sheets on the paper table one by one. Next, to set a new sheet on the paper table, the leading edge of the sheet is inserted between the sheet feeding roller and the separation means while the sheet feeding roller and impeller are stopped.

At this time, depending on the stop position of the impeller, the blades may collide with the leading edge of the inserted paper and prevent the paper from being inserted.

However, since the impeller can rotate within a certain angle with respect to the paper feed roller axis, it rotates when pushed by the inserted paper, and can be inserted until the leading edge of the paper contacts the paper feed roller.

Example Hereinafter, the present invention will be described in detail as shown in the drawings.

FIG. 1 is a perspective view schematically showing an automatic paper feeder according to an embodiment of the present invention, and FIG. 2 is a perspective view similar to FIG. 1, showing an impeller and a fixing ring shifted for explanation. In FIGS. 1 and 2, 1 is paper such as a manuscript to be fed;
2 is a paper stand on which the paper is placed. This paper table 2 is
It is installed horizontally, reducing the overall height of the device.

3 is a paper feed roller provided to feed out the leading edge of the paper 1 set on the paper table 2; 4 is a paper feed roller shaft that rotates while holding the paper feed roller; 5 is a paper feed roller that is pressed against the paper feed roller 3; The separation piece 6 made of a rubber plate or the like is a leaf spring that presses the separation piece 5 against the paper feed roller. The separating piece 5 and the leaf spring 6 constitute a separating means that cooperates with the paper feed row 23 to prevent a plurality of sheets from being fed out. Note that the separating means is not limited to one using a separating piece, and other methods such as a separating roller may be used.

The paper feed roller shaft 4 fixedly holds the paper feed roller 3, and on both sides thereof holds an impeller 8 having flexible blades 9 that extend outside the outer diameter of the paper feed roller 3. There is. This impeller 8 is rotatably attached to the paper feed roller shaft 4 within a limited angle. Specifically, Figure 2,
As shown in FIG. 3, a boss 11 having a notch 10 is fixed to the paper feed roller shaft 4, and an impeller 8 is rotatably fitted into the boss 11. The protrusion 12 is configured to move within the notch 10. With this configuration, the impeller 8 can rotate relative to the paper feed roller shaft 4 within an angular range within which the protrusion 12 can move within the notch 10. In addition, in FIGS. 1 and 2, 13 is the impeller 8.
a fixing ring 14 for fixing the impeller 8 in the axial direction;
This is a groove formed in the paper table 2 so that the blade 9 passes through.

The operation of the automatic paper feeder configured as above will be described below.

As shown in FIG. 3, a plurality of sheets of paper 1 are placed on the paper table 2.
The tip 1a thereof is set so as to protrude from the contact portion between the paper feed roller 3 and the separation piece 5. In this state, the paper feed roller shaft 4 rotates in the direction of arrow A, and accordingly, the paper feed roller 3 also rotates in the direction of arrow A to feed out the paper 1. At this time, the separation piece 5 prevents a plurality of sheets from being sent out at the same time.

By the way, since the paper table 2 is almost horizontal, no force is applied to the paper 1 that would push the leading edge 1a of the paper against the paper feed roller 3. Therefore, the leading edge 1a of the paper is lightly pushed against the paper feed roller 3.
The paper feed roller is either in contact with the paper feed roller or is separated from the paper feed roller. For this reason, even if the paper feed roller 3 rotates in the direction of arrow A, the paper may not be caught between the separation piece and the paper may not be fed. However, when the paper feed roller shaft 4 rotates in the direction of arrow A, the impeller 8 also rotates between the protrusion 12 and the boss 1.
1 rotates in the direction of arrow A. For this reason, the blades 9 of the impeller 8 move while rubbing the upper surface of the paper leading edge 1a, arching the paper 1 in the direction of arrow B, and
A is supplied to the contact portion between the paper feed roller 3 and the separation piece 5. In this way, reliable paper feeding is always performed.

Next, when setting a new sheet of paper 1 on the sheet table 2, insert the sheet of paper 1 in the direction of arrow C in FIG. Insert. At this time, as shown in FIG. 4, one blade 9 of the impeller 8 may be stopped at a position that blocks the insertion of the paper 1. If the leading edge 1a of the paper stops at the position of the blade 9, even if the impeller 8 rotates during paper feeding, the blade 9 will not be able to pull in the paper, making it impossible to feed the paper. however,
Since the impeller 8 can rotate within the angular range formed with respect to the paper feed roller shaft 4, by inserting the paper 1 in the direction of the arrow when setting the paper, the impeller 8 can be rotated within the angular range formed by the paper feed roller shaft 4. 4 to the position shown in FIG. 5, and the paper leading edge 1a can be inserted into a position where paper can be fed.

Here, the rotatable angle of the impeller 8 with respect to the paper feed roller shaft 4 is such that when the paper is set, the leading edge of the paper rotates the impeller 8 and is inserted into the contact position between the paper feed roller 3 and the separation piece 5. For example, it may be about 50 degrees.

Effects of the Invention As is clear from the above description, the present invention includes an impeller having flexible blades extending outward from the outer diameter of the paper feed roller on the paper feed roller shaft that holds the paper feed roller. The structure is such that the impeller can be rotated within a limited angle with respect to the paper feed roller axis, so when feeding paper, the impeller rotates together with the paper feed roller, reducing its flexibility. The blades contact the paper on the paper table and pull it in, ensuring that the leading edge of the paper is fed to the paper feed roller, and the paper feed roller reliably feeds the paper. When setting a roll of paper, the leading edge of the paper pushes against the blade and rotates the impeller, allowing the paper to be inserted until it contacts the paper feed roller. For this reason, reliable paper feeding is possible even when the paper tray is horizontal, the height of the entire device can be reduced, and the parts necessary to introduce paper to the paper feed roller are Since only the impeller provided on the shaft is required, the structure is much simpler than the conventional one using an introduction roller.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an automatic paper feeder according to an embodiment of the present invention, FIG. 2 is a perspective view similar to FIG. 1 showing the impeller and fixing ring shifted for explanation, FIG. Figure 4,
FIG. 5 is a schematic cross-sectional view of the automatic paper feeding device, FIG. 3 shows the state during paper feeding, and FIG. 4 shows the state in the middle of paper feeding.
FIG. 5 shows the state at the end of paper setting. ■...Paper, la...Tip, 2...Paper stand, 3...
... Paper feed roller, 4... Paper feed roller shaft, 5... Separation piece, 6... Leaf spring, 8... Impeller, 9... Vane,
10...notch, 11...boss, 12...protrusion,
13... Fixed ring. Name of agent: Patent attorney Shigetaka Awano and 1 other person

Claims (1)

[Claims] A paper tray on which multiple sheets of paper are placed, a paper feed roller that engages with the leading edge of the paper set on the paper tray and feeds out the paper, and a separation device that cooperates with the paper feed roller to prevent the multiple sheets of paper from being fed out. and an impeller disposed on a paper feed roller shaft holding the paper feed roller and provided with flexible blades extending outside the outer diameter of the paper feed roller, and the impeller includes flexible blades that extend outside the outer diameter of the paper feed roller, An automatic paper feeder characterized in that it is rotatable within a limited angle with respect to a paper feed roller axis.