JPS61248829A - Automatic paper feeder with positioning stopper - Google Patents

Abstract

PURPOSE:To perform the positioning of loading paper on a mounting block being sure in motion, by restricting rotation of a stopper member at the time of setting the paper on the mounting block, setting it down to a positioning stopper, while releasing the restriction during paper feeding, and eliminating a stopper action against the paper feeding. CONSTITUTION:A delivery roller 5 of a rocking lever 3 is lifted upward, while a stopper 8 is slung down with its own weight, and its tip end 803 comes into contact with a surface of the mounting block 1 at a position where a tip end of paper is positioned. At this time, a restricting guide groove 705 of a narrow side of an oscillating control mechanism 7 of the stopper member 8 is fitted in a control pin 702 whereby the member 8 is restricted to be unrotatable, and each tip end of many sheets of paper on the mounting block 1 is trued up to the specified position by a paper strike surface 801 of the member 8. And, when the control pin 702 of the oscillating control mechanism 7 of the member 8 is fitted in a broad rotating guide groove 704, the member 8 is rotatable at will, thus paper 201 is delivered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the positioning of the leading edge of a paper sheet on a paper mounting table in an automatic paper feeder such as a copying machine or a printing machine.

Conventionally, a large number of sheets are stacked and placed on the paper loading table of old copiers, printing machines, etc., and the document table installed in the automatic document feeder of a copying machine, but if the leading edge of the sheet is not in the correct position. A large number of sheets of paper enter the paper path, preventing accurate paper feeding and causing problems such as jams.

For this reason, there are some devices in which a line is provided on the mounting table to indicate the paper leading edge setting position, but this is not a very appropriate means because it relies on the user's visual sense and feeling.

As an alternative to this, there is a method in which the leading edge of the stacked sheets is brought into contact for positioning, a blocking plate is raised and lowered by a solenoid (Japanese Utility Model Publication No. 59-159643), and a blocking plate that moves in and out in conjunction with the opening and closing of the document cover. One with a stopper (
JP-A-58-125537) and the like are known.

However, these devices use solenoids and link mechanisms, and are expensive and have complicated mechanisms.

The present invention solves the drawbacks of the prior art described above, and enables positioning of stacked sheets on a mounting table with a simple structure, no failure, and reliable operation. It is an object of the present invention to provide an automatic paper feeder having a stopper.

In the present invention, a stopper for positioning the leading edge of sheets stacked on a stacking table is linked to a swinging lever having a feed roller for automatic paper feeding, and the stopper is capable of linear and rotational movement. and a swing control mechanism that controls the movement of the stopper member in conjunction with the swinging movement of the swing lever, and when setting paper on the loading table, the rotation of the stopper member is restrained and positioning is performed. During paper feeding, the restraint is released so that the stopper function has no resistance to paper feeding.

The present invention will be specifically explained below with reference to examples.
The same components in each embodiment are given the same reference numerals, and in order to avoid duplication, some explanations will be omitted.

(First Embodiment) Fig. 1 is a perspective view of a stopper member and the main parts of its swing control mechanism in a first embodiment of the present invention, and Fig. 2 is an explanatory diagram of its operation. d) and the figures shown in the circles on the right side of each figure show operating state diagrams of the swing control mechanism of S) -/B.

In Fig. 2, reference numeral 1 denotes a well-known type of paper loading table provided in the main body of the copying machine. A feed-out roller 5 for sequentially feeding out the sheets 2 on the mounting table 1, and an actuating arm 301 operated by a timing cam 6.
A stopper member 8 attached via a swing control mechanism 7 is provided. Reference numeral 11 denotes a separation roller combined with the paper feed roller 4, and 10 indicates a registration roller, both of which are components of the paper feed device that have well-known mechanisms.

The stopper member 8 and its swing control mechanism 7 will be explained with reference to FIG.

This swing control mechanism 7 basically consists of a control pin 702 and guide grooves 704 and 705.

Reference numeral 701 indicates that the swing control mechanism 7 provided on the swing lever 3 is attached with a pin, which is located near the pivot shaft 4 of the swing lever 3 and above the leading edge of the paper on the paper stacking table 1, and is mounted on the stopper member 8.
This provides a positional relationship that allows a predetermined positioning of the leading edge of the paper.

At the end of the pin 701, there is a control pin 701 whose cross section is approximately rectangular by cutting both sides of a round bar to form parallel opposing planes.
is formed.

The stopper member 8 has a paper contact surface 801 having a sliding surface 802 with a rounded chamfered back side of a tip end 803, a rotation guide groove 704 at a base end 804, and a rotation guide groove 704 through which a control pin 702 of a pin 701 is attached. A restraining guide groove 705 is formed.

The guide grooves 704 and 705 are two types of continuous guide grooves having different widths, and both longitudinal ends thereof are rounded into semicircles. The width of the restraining guide groove 705 near the base end portion 804 is slightly wider than the cross section W of the parallel opposing surfaces of the control pin 702 and narrower than the diameter of the control pin 702. Rotation guide groove 7 connected to this
The width of the groove 04 is wider than the diameter of the control pin 702.

Therefore, the stopper member 8 can perform linear movement and rotational movement using the guide groove and the control pin. and,
When the control pin 702 fits into the guide groove 705 for restraint, the shaft member 8 is restrained by the rotator, but when the control pin 702 fits into the guide groove 704 for rotation, the member 8 is restrained by the rotator. teeth,
7) The pa member 8 has a mechanism that allows it to rotate freely.

The diameter of the pin 701 is larger than the rotation guide groove 704, and the stopper member 8 can be installed with either the rotation guide groove 704 or the restraining guide groove 705 fitted into the control pin 702. It is attached to a bottle 701 and is prevented from being removed by a stopper fitting 703, and is used in the state shown in FIG. 2.

The operation of this embodiment will be explained with reference to FIG.

Figure (a) shows the initial state, in which the feed roller 5 provided at the tip of the swing lever 3 is lifted 1° above the paper table, and the stopper member 8 is suspended by its own weight. , its leading edge 803 is in contact with the surface of the paper mounting table 1 at a position where the leading edge of the paper is positioned.

At this time, in the guide groove of the swing control mechanism 7 of the stopper member 8, the narrower restraining guide groove 705 is fitted with the control pin 702, as shown in the right shoulder circle 7a in the figure. The stopper member 8 is in a state where its movement is restricted so that it cannot rotate.

Therefore, as shown by the two-dot chain line, even if a large number of sheets are piled up and casually inserted into the sheet mounting table 1, the leading ends of the sheets are aligned at a predetermined position by the sheet contacting surface 801 of the stopper member 8.

Eventually, the timing cam 6 starts rotating, and the swing lever 3
rotates to the right, and the feed roller 5 moves the paper 2 on the paper loading table l.
is in contact with the surface of the paper 201 at the top (see figure (b)).

At this time, the swing control mechanism 7 of the stopper member 8 has its control pin 702 as shown in the right shoulder circle 7b in the figure.
Since it fits into the wider rotation guide groove 704, the soot collar member 8 is in a state where it can freely rotate.

The feed roller 5 at the tip of the swing lever rotates, and the top paper 201 of the paper 2 on the paper loading table 1 is moved to the stopper member 8.
When the paper 201 is fed in the direction of 1., the leading edge of the paper 201 pushes away the rotatable stopper member 8. Rotate this to the right, and the paper 201 goes under this and feeds into the paper feed roller 4.
and separation roller 11 (see figure (C)).
.

At this time, the swing control mechanism 7 of the stopper member 8 is operated while its control pin 702 is fitted into the wider rotation guide groove 704, as shown in the right shoulder circle 7C in the figure. 8 is rotated and slid upward to form a paper feeding gap on the lower surface of the stopper member 8.

In this way, when the feeding roller 5 finishes feeding the uppermost paper 201, the timing cam 6 moves to the swing lever 3.
The operating arm 301 of the swing lever 3 is rotated to the left, and the roller 5 at the tip thereof is separated from the paper surface of the paper mounting table 1 and stopped in a locked state by the timing cam 6, and the paper feed roller 4 Also, move the paper 201 through a pair of registration rollers.
After conveying the paper 201 until it comes into contact with O, it is temporarily stopped to correct the inclination of the paper 201 (see figure (d)), and then restarted and conveyed the paper 201.
The recycle is completed by feeding 01 to the next stage transport means (not shown).

At this time, the control pin 702 of the swing control mechanism 7 of the stopper member 8 is connected to the paper 201 and slides diagonally downward as shown in the right shoulder circle 7d in the figure. Approach the restraining guide groove 705, which is the narrower guide groove.

However, as shown in FIG. 3, if there is paper remaining on the loading table 1 even when the feed roller 5 is separated from the paper surface, the stopper member 8 will return to its original state. The feed roller 5 is moved by the swing of the swing lever 3 while maintaining the state shown in FIG.
can send out sheets one after another.

Then, the number of sheets on the table 1 gradually decreases, the stopper member 8 moves in the direction of the arrow in FIG.
Although the rotational movement is restricted as in the state shown in FIG. 3(a), this does not pose a problem because it becomes possible to rotate again by swinging the swinging lever 3.

That is, at least when setting paper, as shown in FIG. 2(a), the stopper member 8 acts as a stopper for positioning the paper set on the mounting table with its rotational movement restricted, and the paper is fed. The inside part is free from restraint and can rotate freely, so it does not interfere with paper feeding.

The above describes the case where a large number of sheets are stacked and set on the loading table, but even when setting a small number of sheets, as shown in FIG. After the positioning is performed, the long groove structure of the rotation guide groove 704 makes it possible to reliably feed the paper.

(Second Embodiment) FIG. 5 is a perspective view of the main part of the S7 spa member and its swing control mechanism in the second embodiment.

This is a configuration in which the control pin 702 and guide grooves 704 and 705 of the swing control mechanism 7 in the first embodiment are reversed, that is, the control pin 702 is used as the stopper member 8, and the guide groove 704
．． 705 is provided on the swing lever 3.

To explain the figure, (b) the proximal end portion 804 of the 7-bar member 8;
For attachment, a pin 701 is provided, and a control pin 702 is integrally provided at the tip thereof.

This control pin 702, like the control pin 702 in FIG. 1, is a bottle having a substantially rectangular cross section by cutting both sides of a round bar to form parallel opposing planes.

704 and 705 are guide grooves formed in the swing lever 3, 704 is a rotation guide groove, and 705 is a restraining guide groove, which is similar to the guide groove 70 in the first embodiment.
This corresponds to 4.705.

Therefore, the stopper member 8 is attached to the bin 701.
The guide groove 704 of the swing lever 3 is controlled by the control pin 702 of the
Alternatively, by passing the paper through the paper tray 705 and preventing the paper from being pulled out using the stopper fitting 703, it is possible to position the paper on the paper stacking table and feed the paper by the same action as in the first embodiment described above.

(Third Embodiment) FIG. 6 is a perspective view showing the main parts of a stopper member and its swing control mechanism according to a third embodiment of the present invention, and FIG. 7 is an explanatory diagram of its operation.

Reference numeral 9 represents the swing control mechanism of this embodiment,
It is composed of a protruding piece 90 provided on the swing lever 3, a restraint control section 906 and a rotation control section 907 formed on the stopper member 8.

The protruding piece 90 is a guide portion that also serves as a member for attaching the stopper member 8, and the opposing protruding pieces 903 form a guide groove 902 having a tapered opening 901.

The protruding piece 90 can be integrally provided on the side surface of the swing lever 3 as shown in the figure, or it can be a detachable retrofitted part that is manufactured separately and has a function equivalent to the protruding piece. You can.

Furthermore, if the strength of the lever 3 allows, the lever 3 may be
It can also be formed by a through hole extending from the upper surface to the lower surface.

The stopper member 8 has the protruding piece 90 at its base end 904.
A restraint control section 906 having a size that is slightly smaller than the cross section of the guide groove 902 and fits therein, and the restraint control section 906
A rotation control portion 907 is formed which extends from the tapered portion through the taber portion.

This rotation control portion 907 has a cross-sectional dimension that is equal to or greater than that of the protruding piece 907.
0 guide groove 902 is sufficiently smaller than the cross-sectional dimension of the guide groove 902.
2, the shape and dimensions are designed to allow sufficient rocking or swinging motion.

Therefore, in the initial state of paper feeding shown in FIG. 7, when the feed roller 5 is in the inactive position, the restraint control section 906 of the stopper member 8 fits into the guide groove 902 of the protruding piece 90, as shown by the solid line. In this case, the leading ends of the stacked papers 2 on the paper mounting table 1 can be aligned and positioned by restraining the pa- mber 8 so as not to be able to rotate.

In addition, when in the paper feeding state, the stopper member 8 is pushed up by the paper being conveyed, and when the rotation control section 907 comes into the guide groove 902 of the protruding piece 90, the stopper member 8 freely swings. Or, the stopper member 8 can be rotated as shown by the two-dot chain line in FIG.
(only the stopper member and paper being fed are shown) tilted,
As in the first and second embodiments, the tip 803
Paper can pass under it.

In addition, in the embodiment of the present invention, the stopper member 8 is
Although the explanation has been given using an example in which the stopper member 8 is provided on the swing lever 3 of the delivery roller, it is not necessarily necessary to attach the stopper member 8 directly to the swing lever 3, and its rotation is controlled by the swing control mechanism linked to the movement of the swing lever 3. All that is required is for the movement to be restrained and released.

Further, it goes without saying that the paper mounting table in this embodiment may be replaced with a document table of an automatic document feeder.

There is no need to check the paper, and by simply placing the paper on the loading table and pushing it a little, the stopper member automatically positions the paper appropriately, and the stopper member has an extremely simple structure despite its complex function. This has the excellent effect of providing an automatic paper feeder that is inexpensive in terms of cost.

[Brief explanation of drawings]

FIG. 1 shows a stopper member in a first embodiment of the present invention,
FIG. 2 is a perspective view of the main part of the swing control mechanism. FIG. 4 is an explanatory diagram of the operation of the first embodiment. FIG. 5 is a perspective view of the main part of the second embodiment. Perspective view of main parts of the embodiment, No. 7
The figure is an explanatory diagram of the operation of the third embodiment. 1... Paper loading table 3... Swing lever 5... Feed roller 8... Stopper member 7.9... Swing control mechanism Patent applicant Sanda Kogyo Co., Ltd. Figure 1 Figure 3 Figure 4Figure 2 (On 70 1F

Claims (1)

[Claims] A swing lever that is located above a paper loading table of a copying machine, etc., and has a feed roller that sequentially feeds out sheets of paper one by one from the top surface of the stacked sheets on the loading table, and a paper leading edge positioner that is capable of linear and rotational movement. An automatic paper feeder comprising: a stopper member; and a swing control mechanism that restricts and releases the rotation of the stopper member in conjunction with the swing movement of the swing lever.