JPH01123779A - Paper separating mechanism - Google Patents

Abstract

PURPOSE:To enable constant supply of only the uppermost sheet, by providing a projected point part at the front end on the side of a peak part of a clamping body provided in combination with a supplying roller so as to feed a multiplicity of papers placed on a supplying base plate by one sheet at a time, and providing a retarding recessed surface forming a cavity for not clamping the paper on the side of a peak part following the projected point part. CONSTITUTION:When two papers E in an overlapping condition are clamped between the peripheral surface of a supplying roller 3 and a projected point part 14 of a clamping body B, the leading end part of the second sheet of paper E droops into a retarding recessed surface 15 forming a cavity C at a position on the side of a peak part following the projected point part 14 of the clamping body B, under its own weight. The retarding recessed surface 15 is formed of a urethane resin, a synthetic rubber material or the like, and acts as a decelerating resistive surface on the paper being in sliding contact of an upper surface thereof, so that the leading end part of the second sheet of paper E receives a decelerating resistance. Therefore, the first sheet of paper E is fed forward along the rotation of the roller 3 while making contact with the roller 3, whereas the second sheet of paper E remains stopped away from the first sheet of paper E. Thus, only the desired first sheet of paper E is always fed assuredly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is applicable to a part of office automation equipment such as a printer or a copying machine, as a paper feeding device for sequentially feeding sheets of paper addressed to a single address into the equipment. This relates to the paper separation mechanism to be installed.

2. Description of the Related Art A paper separating mechanism in a conventional paper feeding device is shown in FIG. In other words, the clamping body B, which is disposed as the other main part of the separation mechanism at a position facing the feed roller 3, which is one main part of the separation mechanism, is
The entire area of the top portion between which the paper E is held is constituted by a uniform wide retard flat surface.

Problems to be Solved by the Invention Due to the above configuration, the conventional paper separating mechanism has the following problems.

When the topmost paper E among the sheets E loaded on the paper lifting board 20 comes into sliding contact with a part of the circumferential surface of the feeding roller 3 which is in a rotating state due to the lifting operation of the paper lifting board 20, its leading edge It is drawn between the roller 3 and the clamping body B and enters between them. At this time, since the entire top part of the clamping body B is formed as a uniform wide retard flat surface, basically, even if the separate mechanism (separation feeding mechanism) is for a single sheet, when the incoming sheets E are stacked in two sheets, 3 is a roller 3 whose circumferential surface is close to a flat surface only at the position of pressure contact due to the wide flat part of the entire top part and the pressure contact of this flat part.
This means that each sheet of paper will be held even more tightly between the two. Therefore, the double sheet of paper E, which is strongly held between these two sheets, is not separated into a single sheet (one sheet) at this position.
The two sheets are fed as they are, which causes waste of sheets E, and there is a problem in that the reliability of the accuracy of the OA equipment decreases.

This invention solves the problems of the prior art described above. That is, an object of the present invention is to feed only the topmost sheet even if the topmost sheet of paper drawn between the feeding roller and the clamping member is stacked in two during the lifting operation of the paper board, The object of the present invention is to provide a paper separation mechanism that allows the double sheet of paper below to remain at this position, thereby eliminating wasted paper and increasing the reliability of the accuracy of the office automation equipment.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has a paper feeding device that uses a feeding roller and a clamping member in the main body of a paper feeding device to hold a large number of sheets of paper on a feeding board to a single paper. In a paper separation mechanism to be operated for paper feeding, a nipping protrusion is provided at the front end of the top side of the nipping body to contact the feeding roller, and at a position on the trailing top side of the protruding protrusion, it is connected to the above-mentioned feeding roller during the paper feeding operation. A retard concave surface is provided between which a gap is formed that does not sandwich the paper.

Function When installing the paper feeding device with the above-mentioned separation mechanism in OA equipment and performing paper feeding operation, first rotate the feeding roller, and then perform the lifting operation on the paper board on which a large number of sheets are loaded. When the paper is fed, the paper at the top of the paper comes into sliding contact with a part of the circumferential surface of the rotating feed roller.
The tip thereof is drawn into and enters between the circumferential surface of the roller and the nipping convex tip provided at the front end of the top side of the nipping member. At this time, since the nipping convex tip has no area in the rotational direction of the feed roller, when the nipping convex tip comes into pressure contact with the circumferential surface of the feed roller, the paper held between them is temporarily in a double stacked state. However, since the clamping force acting on the paper is nothing more than a line contact with no surface area, it is possible to easily prevent double sheets of paper that do not come into sliding contact with the rollers from continuously entering the rollers. In other words, when a double sheet of paper is clamped between the circumferential surface of the feed roller and the convex tip of the clamping body, the leading edge of this paper passes through the clamping position in a double stacked state, but immediately after passing, the double sheet of paper is The tip of the clamping tip descends under its own weight into the retard concave surface with a gap formed on the trailing top side of the protruding tip of the clamping tip.
At this point, the double sheet of paper separates from the first sheet of paper, so that its continuous advance is interrupted and it stops at this position. Therefore, during the paper feeding operation, only the desired first sheet of paper can be easily and reliably fed.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

First, to explain the structure, as shown in FIG. 1, there is a feeding roller molded from a rubber material in the upper part of the interior near the front side opening 2 of the main body 1, which is the outer shell of the paper feeding device A. 3
is arranged so as to be rotatable in one direction by being fitted onto the rotating shaft 4.

Directly below the feed roller 3, a paper tray 6 is arranged with a flat surface formed at the center by bending a metal plate. A paper lifting slope 7 is disposed at the center thereof with a cutout portion into which a clamping protrusion 14 of a clamping body B (to be described later) can be accommodated, and on both sides of this paper lifting slope 7, as will be described later. A spring retaining piece 8 is formed parallel to the upper surface of the arm portion 12 of the clamping body B, and a clamping body B to be described later is formed on both sides of each spring retaining piece 8.
The paper tray is arranged at an angle at the same height as the retard concave surface 15 on the top side.The feeding board 5, which is a unit made by extending the piece 9 upward at the rear, is fixed at a specified height by screws etc. on both sides. It is permanently installed.

Further, at a position behind the feeding board 5, a holding body B, which will be described later, is arranged to sandwich the paper E between it and the above-mentioned feeding roller 3, and to feed the paper E to the single destination process side. In the paper separation mechanism that forms the main part of the paper feeding device A, the hypotenuse line F passes through the axis of the feeding roller 3, which is one main part.
At a position on the lower line (a line forming an angle of 40 degrees with the paper lifting slope 7 of the feeding board 5 described above), a gripping body B shown below, which is the other main part of the separation mechanism, is in a vertically movable state. It is located.

This clamping body B is constructed as follows. That is, as shown in FIGS. 1 to 4, this clamping body B is entirely molded from a synthetic resin material or the like. First, the main body 11 is formed into a thick, horizontal long plate, and a forward-facing arm 12 is protruded from a mid-height position on the front side of the body 11. Further, a downward notch hole 13 is provided at the center of the distal end side of the arm portion 12 in parallel with the body 11.

At the front end of the top side of the clamping body B, a tapered clamping protrusion 14 that contacts the circumferential surface of the feeding roller 3 described above is formed so as to be parallel to the longitudinal direction of the body 11. Further, at the position on the trailing top side of the nipping protrusion 14, there is a position where the feeding roller 3 and the nipping body B are physically unable to nip the paper E between the feeding roller 3 and the nipping body B during the paper feeding operation described later. The void C(0,
A retard concave surface 15 having a gap of about 2 mm is arranged parallel to the body 11. This retard concave surface 1
5 is formed into a horizontally long plate made of, for example, urethane resin or synthetic rubber, and is arranged so as to form a deceleration resistance surface for the paper E that is in sliding contact with the upper surface thereof.

As shown in FIGS. 1 and 4, the above-mentioned clamping body B is
The notch hole 13 is fitted into the operating shaft 10 which is disposed in a horizontal structure directly below the paper tray 6 of the feeding board 5, and the upper surface of the arm portion 12 is fed with the operating shaft 10 as the center. When the feeding board 5 comes into contact with the paper tray 6, the nipping convex tip 14 touches the feeding roller 3.
It is arranged so as to be able to freely swing in the vertical direction in such a manner that it comes into pressure contact with the circumferential surface of the cylinder by a predetermined amount. In this case, curved pieces 16 with spring holes 17 are protruded from the lower ends of both sides of the clamping body B, and between the spring holes 17 on both sides and the spring stopper pieces 8 of the feeding board 5 in each column. In this case, the clamping body B is moved to the feeding roller 3.
A tension spring 18 for pressing against the circumferential surface of each is suspended.

As shown in FIG. 1, the paper separation mechanism in the paper feeding device A includes a paper tray 6 and a paper tray 6 at a position immediately before the aforementioned feeding board 5 and on the upper surface side of the paper tray 6. A paper lifting board 20 made of a long side plate of approximately the same width is integrally fitted with its proximal end into an operating shaft 19 directly below the proximal end, and by rotation of this operating shaft 19, the distal end side fixed on the paper tray 6 is moved. When it swings upward, a large number of sheets of paper E loaded on this top surface
The paper feed roller 3 is arranged so as to be able to lift the tip of the paper toward the circumferential surface of the feeding roller 3.

Further, at the rear position of the feed roller 3, the paper E for a single address, which was fed to that direction by the feed roller 3 and the clamping body B, is held in a clamping manner to the rear paper feed plate 23, 24 side. Feed rollers 21 and 22 are arranged so as to be movable by sliding contact. Note that 25 shown in FIG. 1 is a tray that is detachably fitted into the opening 2 of the main body 1 from the outside in order to supply the paper E to the separation mechanism in the paper feeder A.

Feeding roller according to the above 3. The clamping body B and the paper lifting board 20 are connected to a control panel (not shown) with a drive source at the rotating shaft 49 and operating shaft 10.19 for each position, and the automatic paper feeding operation of the paper E is performed by mutually cooperative rotational operation. It is configured in such a way that it is possible.

When paper feeding device A is installed in OA equipment, etc., and the paper feeder A is equipped with the separation mechanism configured as described above in the main body 1, and the paper feeding operation is performed, first, as shown in FIGS. 1 and 4, By fitting the tray 25 into the opening 2 of the tray 25, the leading ends of the multiple sheets E stored in the tray 25 are positioned on the upper surface of the paper board 20. At this point, the feed roller 3 is rotated in one direction by driving the rotary shaft 4. Next, one operating shaft 19 is driven to lift the paper board 20 on which a large number of papers E are loaded, while at the same time, the other operating shaft 10 is driven to lift the clamping body B, which until then was lifted from the feed roller 3. When the clamping body B is released from the state where it has been pulled down to a distance from the circumferential surface, the clamping convex tip 14 at the front end of the top side touches the circumferential surface of the feeding roller 3 due to the upward pulling force of the tension spring 18. In addition to being raised to the height position where the paper is pressed, the leading edge surface of the uppermost sheet E comes into sliding contact with the circumferential surface of the feeding roller 3 due to the lifting operation of the paper lifting board 20. It is drawn in between the tip of the protruding protruding portion 14 and enters toward the inner part between the two.

At this time, the protruding protruding portion 14 is tapered and has no area in the rotational direction of the feed roller 3, so when the protruding protruding portion 14 comes into pressure contact with the circumferential surface of the feed roller 3, there is a gap between the two. Even if the paper E held between the
This clamping force acting on the paper width is nothing more than a line contact parallel to the axial direction of the feeding roller 3. Therefore, it is possible to prevent the double sheet of paper E that does not come into sliding contact with the circumferential surface of the feeding roller 3 from continuing to enter toward the back together with the -th sheet of paper E.
This can be easily and reliably prevented for the following mechanical reasons.

That is, when two sheets of paper E, E are sandwiched between the circumferential surface of the feeding roller 3 and the convex tip 14 of the sandwiching body B, the leading edge of each of the paper sheets E, E is positioned at the clamping position from above and below. Immediately after passing, the leading edge of the double sheet E descends under its own weight into the retard concave surface 15 that forms a gap C at the position of the trailing top of the nipping convex tip 14. become. (See Fig. 4) In this case, the retard concave surface 15 is made of urethane resin or synthetic rubber material, and is configured to act as a deceleration resistance surface for the paper width that is in sliding contact with the upper surface. The leading edge of the double sheet E that has descended into the retard concave surface 15 is subjected to deceleration resistance by the retard concave surface 15 from this point on. Therefore, even at this point, the first sheet of paper E is in contact with the feed roller 3 and has entered the inner part where this roller 3 rotates, so at this position, the double sheet of paper E is The paper E is moved away from the paper E and the stopped state continues, so that only the desired first paper E can be easily and reliably fed towards the inner part at any time during paper feeding operation.

In the above embodiment, as shown in FIG.
Although it has been described that the sheets stacked on the paper board 20 are sequentially fed from the top, the present invention is not limited to the above-described embodiment. It is also possible to set the paper sheet in the opposite position to that shown in FIG. 1 and feed the stacked sheets one after another from the lowest position.

In that case, by arranging a small-scale belt conveyor (not shown) at this position instead of the feeding roller 3,
The same functions and effects as in the above embodiment can be obtained.

Effects of the Invention The present invention provides a paper separation mechanism in which a large number of sheets of paper on a feeding substrate are fed by holding them to a single address using a feeding roller and a holding member in a main body of a paper feeding device. A nipping convex tip that comes in contact with the feeding roller is provided at the front end of the side, and a retard concave surface is provided on the trailing top side of the protruding tip to form a gap between the feeding roller and the paper during the paper feeding operation. It is characterized by the following. Therefore, even if the uppermost sheet of paper that is drawn between the feeding roller and the clamping member by lifting the paper board during paper feeding operation is in a double stacked state, a gap is formed at the top and a deceleration resistance surface is formed directly below it. By sliding the double sheet of paper down into the retard concave surface with the retard, continuous entry of this double sheet of paper is reliably prevented, so that only the topmost sheet is always fed to the desired position. This eliminates paper waste and
This has the effect of greatly increasing the reliability of the accuracy of equipment A.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing the paper separation mechanism according to the present invention, Fig. 2 is a side view of a clamping body which is the main part of the mechanism, Fig. 3 is a front view of the same, and Fig. 4 is the same as that shown in Fig. 1. FIG. 5 is a detailed diagram showing the operation during the paper feed operation in a conventional example. [Explanation of symbols] 1... Main body 2... Opening 3...
Feeding roller 4... Rotating shaft 5... Feeding board 6... Paper tray 7... Paper lifting slope
8... Spring stopper piece 9... Paper holder is one piece
10.19... Operating axis 11... Body
12... Arm portion 13... Notch hole 14.
... Clamping convex tip 15 ... Retard concave surface 16 ... 6 pieces 17 ... Spring hole 18
... Retraction spring 20... Lifting paper board 21.2
2-... Feed rollers 23, 24... Paper feed plate A... Paper feed device B... Clamping body C...
・Gap D... Retard plane E...
・Paper F... hypotenuse line patent Applicant Clover Engineering Co., Ltd. Figure 4 Figure 5

Claims (1)

[Claims] In a paper separation mechanism in which a large number of sheets E on a feeding substrate 5 are fed by holding them to a single address by a feeding roller 3 in a paper feeding device main body 1 and a holding body B, the top side of the holding body B is A nipping convex peak 14 that contacts the feeding roller 3 is provided at the front end, and a gap C is provided at the trailing top side of the convex peak 14 so that the paper E is not clamped between it and the feeding roller 3 during the paper feeding operation.
A paper separation mechanism characterized by comprising a retard concave surface 15 having a shape.