JPH07315610A - Separating carrier - Google Patents

Abstract

PURPOSE:To surely separate sheets one by one at a time by forming the second notched part, which is opposite to a carrying guide plane in parallel with a little space when a middle roller is rotated to a position where the tip of the sheet having entered the first notched part comes off from the first notched part, on the peripheral part of the middle roller. CONSTITUTION:The tips of a sheet 1 are made to enter the first notched part 13 and abutted against a flat plane 13a, and a middle roller 12 is thereby rotated in a direction shown by an arrow (a) as much as 90 deg.. The tips of the sheet 1 therefore come off from the first notched part 13, and at the same time, abut against the arcshaped periphery of the middle roller 12 to be arranged in a wedge-shape. When the middle roller 12 rotates as much as 90 deg., the second notched part 14 is opposite to a carrying guide plane 6 in parallel with a little space. The sheets 1 passing through the little space formed between the second notched part 14 and the carrying guide plane 6 attain an abutting part between a separating roller 8 and a sheet separating piece 9 in a state where their tips are arranged in a wedge shape, and are separated one by one at a time and carried.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separating / conveying device for separating and conveying a plurality of sheets placed on a sheet table one by one.

[0002]

2. Description of the Related Art Conventionally, there are various types of separating / conveying devices for separating and conveying a plurality of sheets placed on a sheet table one by one, and one of them is shown in FIG. There is one shown in FIG.

The separating / conveying apparatus shown in FIGS. 3 to 5 applies a pressure to the sheet table 2 on which the sheet 1 is placed and the sheet 1 placed on the sheet table 2 by the urging force of the pressure spring 3. The pressure plate 4 and the lower surface of the sheet 1 placed on the sheet base 2 are brought into contact with the lower surface side of the sheet 1 and are rotationally driven to convey the sheet 1, and the lower surface of the sheet 1 conveyed by the conveying roller 5 slides. A conveyance guide plate 7 having a conveyance guide surface 6 in contact therewith, a separation roller 8 located downstream in the conveyance direction of the sheet 1 and driven to rotate, and a sheet separation piece 9 pressed against the outer peripheral surface of the separation roller 8 with a predetermined pressure. And the like. Further, a stopper 10 for positioning the sheet 1 to be placed on the sheet table 2 and aligning the leading ends of the sheet 1 and several lower sheets of the sheet 1 conveyed to the conveying roller 5 are used as a separating roller 8 and a sheet separating piece 9. A gate 11 is provided to allow the passage to the contact portion side with.

In such a structure, first, when setting the sheet 1 on the sheet table 2, the operator places the sheet 1 on the sheet table 2 with the pressing plate 4 being lifted, and then the sheet 1 is placed on the sheet 1. Sheet 1 pushed to the downstream side in the conveying direction
This is done by bringing the tip end of the abutting contact with the stopper 10 and aligning the tips.

When a sheet conveyance command signal is output from a control unit (not shown) after the leading edge of the sheet 1 is set in contact with the stopper 10, the stopper 10 moves upward to cause the sheet 1 to move. The state in which it abuts against the leading end of the sheet 1 is released, and further, the transport roller 5 moves upward to abut the lower surface of the sheet 1 and is rotationally driven in the transport direction.

The sheet 1 as a whole is conveyed to the separating roller 8 side by the rotational driving of the conveying roller 5, and the upper side of the sheet 1 comes into contact with the gate 11 before reaching the separating roller 8 side, and the movement is restricted. On the other hand, the lower several sheets 1 which are not in contact with the gate 11 are continuously conveyed to the separation roller 8 side, and the leading ends of the several sheets 1 are separated from the separation roller 8 and the sheet separation piece 9 as shown in FIG. To the contact part. Then, the several sheets that have reached the contact portion between the separation roller 8 and the sheet separation piece 9 are separated and conveyed one by one by the separation roller 8 and the sheet separation piece 9.

[0007]

In order to surely separate the sheets 1 sheet by sheet by the separating roller 8 and the sheet separating piece 9, the contact portion between the separating roller 8 and the sheet separating piece 9 is reached. It is necessary to arrange the leading ends of several sheets 1 in a wedge shape as shown in FIG. However, in the above-described separating / conveying device in which the operator brings the leading end of the sheet 1 into contact with the stopper 10, it is difficult to always align the leading end of the sheet 1 in a wedge shape, and as shown in FIG. In many cases, it has a wedge shape or a pencil shape as shown in FIG. 5C, which causes double feeding and non-feeding.

It should be noted that, as a separating and conveying apparatus in which the leading end portions of the sheets are surely arranged in a wedge shape, it is actually fair to use 2-357.
No. 07, a sheet separating piece in which a part of the friction coefficient is changed is disclosed. However, in this separating / conveying device, it is necessary to incline the sheet base obliquely, and there are large restrictions on the configuration. In addition, it cannot be applied to the separation / conveyance apparatus configured as shown in FIGS.

[0009]

The invention according to claim 1 is
A sheet table on which a plurality of sheets are placed, a conveyance roller that conveys these sheets by abutting the lower surface side of the sheet placed on the sheet table and rotating the sheet, and conveying the sheet. In a separation / conveyance device having a separation roller located downstream in the direction of rotation and a sheet separation piece pressed against the outer peripheral surface of the separation roller with a predetermined pressure, the lower surface of the sheet conveyed by the conveyance roller. An intermediate roller having a shaft center parallel to the conveyance guide surface which is in sliding contact with and orthogonal to the conveyance direction of these sheets is arranged between the conveyance roller and the separation roller, The first cutout portion having a substantially L-shaped cross section cut out by two planes that are substantially orthogonal to each other while the front end portion of the sheet placed on the inside is inserted into the outer periphery of the intermediate roller. When the intermediate roller is rotated to a position where the leading end portion of the sheet that has been formed into the first cutout portion is separated from the first cutout portion, the sheet is opposed to the conveyance guide surface in parallel with a slight gap. A second cutout portion is formed on the outer peripheral portion of the intermediate roller, and a rotation control unit for controlling the rotation of the intermediate roller to a predetermined rotation position is provided.

According to a second aspect of the invention, in the first aspect of the invention, the intermediate roller is moved to a position where the first notch faces the upstream side in the sheet conveying direction and a position where the second notch faces the conveying guide surface. A rotation control unit that reciprocally rotates is provided.

[0011]

According to the first aspect of the present invention, one of the two planes forming the first cutout portion is directed downward in the vertical direction by the rotation control of the rotation control, and the other is intermediate to a position facing the upstream side in the sheet conveying direction. By rotating the roller, the leading end of the sheet to be placed on the sheet table enters the first cutout portion, and the leading end of the sheet abuts on the plane facing the lower side in the vertical direction and is aligned. Then, when the leading end of the sheet that has entered the first cutout portion is disengaged from the first cutout portion and the second cutout portion is rotated to a position facing the conveyance guide surface in parallel with a slight gap, the first cutout portion is formed. The leading edge of the sheet separated from the edge portion is arranged in a wedge shape along the arc-shaped outer peripheral surface of the intermediate roller, and several sheets whose leading edge portions are arranged in a wedge shape are second.
It is conveyed to the separation roller side through between the notch and the conveyance guide surface. Therefore, the leading ends of the several sheets that reach the contact portion between the separating roller and the sheet separating piece are surely arranged in a wedge shape, and the separating roller and the sheet separating piece separate the sheets one by one. Is reliably carried out.

According to the second aspect of the invention, the intermediate roller reciprocally rotates the intermediate roller to a position where the first notch faces the upstream side in the sheet conveying direction and a position where the second notch faces the conveying guide surface. Therefore, the structure for controlling the rotation of the intermediate roller by the rotation control unit is simplified, and reliable rotation control can be performed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The same parts as those described with reference to FIGS. 3 to 5 are designated by the same reference numerals, and the description thereof will be omitted. Sheet 1
An intermediate roller 12 is disposed above the transport guide plate 7 between the transport roller 5 for transporting the sheet and the separation roller 8 against which the sheet separating piece 9 is pressed with a predetermined pressure. The intermediate roller 12 is an axis that is parallel to the transport guide surface 6 on which the lower surface of the sheet 1 transported by the transport roller 5 is in sliding contact, and is orthogonal to the transport direction of these sheets 1. It has a heart and is rotatably provided.

Next, a first notch 13 and a second notch 14 are formed on the outer peripheral portion of the intermediate roller 12.
The first cutout portion 13 has two planes 13 orthogonal to each other.
It is formed by cutting out a and 13b and has a substantially L-shaped cross section into which the front end of the seat 1 placed on the seat base 2 is inserted. On the other hand, the second notch portion 14 is
As shown in FIG. 2A, the intermediate roller 12 is rotated in the direction of arrow a from the state where the leading end of the sheet 1 that has entered the first cutout portion 13 is in contact with the flat surface 13a, and the intermediate roller 12 is moved to the position shown in FIG.
As shown in (c), when the front end of the sheet 1 that has entered the first cutout 13 by rotating 90 ° is disengaged from the first cutout 13, it is parallel to the conveyance guide surface 6 with a slight gap. Is formed in a shape facing the.

A rotation controller (not shown) for controlling the rotation of the intermediate roller 12 to a predetermined rotation position is connected to the intermediate roller 12, and the rotation control by the rotation controller is shown in FIG. The intermediate roller is rotated by 90 ° from the position shown in a) to the position shown in FIG. 2c until a sensor (not shown) detects that the sheet 1 placed on the sheet base 2 is gone. 2 is stopped at the position shown in FIG. 2C, and after the sensor detects that the sheet 1 is exhausted, the intermediate roller 12 is rotated 90 ° in the direction of arrow a '.

With such a structure, when the sheet 1 is set on the sheet base 2, the intermediate roller 12 is fixed at the rotation position shown in FIGS. 1 and 2A by the rotation control of the rotation control section. ing. Then, the operator places the sheet 1 on the sheet table 2 with the pressure plate 4 lifted, and pushes the sheet 1 to the downstream side in the transport direction of the sheet 1 so that the leading end portion of the sheet 1 enters the first cutout portion 13. The leading end of the sheet 1 is aligned by bringing the leading end of the sheet 1 into contact with the flat surface 13a.

When the control section (not shown) outputs a sheet conveying command signal after the leading edge of the sheet 1 is inserted into the first notch 13 and brought into contact with the flat surface 13a, first, the rotation control section. The intermediate roller 12 is rotated 90 ° in the direction of arrow a by the rotation control. Here, when the intermediate roller 12 is rotated 90 ° in the direction of arrow a from the state shown in FIG. 2A, the leading end of the sheet 1 that has entered the first cutout 13 is disengaged from the first cutout 13 and As shown in FIGS. 2 (b) and 2 (c), the leading ends of the sheets 1 are arranged in a wedge shape by contacting the arc-shaped outer peripheral surface of the intermediate roller 12. Then, when the intermediate roller 12 is rotated by 90 °,
As shown in (c), the second notch portion 14 faces the conveyance guide surface 6 in parallel with a slight distance.

Next, after the intermediate roller 12 is rotated to the position shown in FIG. 2C, the conveying roller 5 moves upward to come into contact with the lower surface of the sheet 1 and is rotationally driven in the conveying direction of the sheet 1.

When the transport roller 5 is rotationally driven in the transport direction of the sheet 1, several sheets 1 pass through the slight gap formed between the second cutout portion 14 and the transport guide surface 6 to transport the sheet 1. Moreover, these several sheets 1 reach the contact portion between the separation roller 8 and the sheet separation piece 9 in a state where the leading ends of the sheets 1 are surely arranged in a wedge shape. Then, the several sheets 1 reaching the contact portion between the separation roller 8 and the sheet separation piece 9 are separated and conveyed one by one by the separation roller 8 and the sheet separation piece 9.

Here, the several sheets 1 that have reached the abutting portion of the separation roller 8 and the sheet separating piece 9 are arranged in a wedge shape at their leading ends, so that these sheets 1 are separated one by one. It is possible to reliably carry out separation. Further, since the intermediate roller 12 has a function of combining the stopper 10 and the gate 11 of the conventional example described with reference to FIGS. 3 to 5, the number of parts is reduced and the installation space is saved, so that the separation / conveyance apparatus is downsized. Can be achieved.

Further, the rotation control unit controls the intermediate roller 12 to 90 degrees.
Since it is reciprocally rotated by each degree, the structure of the rotation control is simplified and reliable rotation control can be performed.

In this embodiment, the intermediate roller 1
Although the description has been given by taking the case where the rotation control is performed by reciprocally rotating 2 by 90 ° as an example, this angle should not be limited to 90 °, and the rotation direction is not reciprocal rotation but one direction. It may be rotated to.

Further, in this embodiment, the second cutout portion 1
4 are conveyance guide surfaces 6 facing each other in parallel with a slight distance.
The sheet guide 2 is formed on the sheet guide 2 as an example. However, when the sheet guide 2 that extends to a position close to the separation roller 8 is used and the sheet guide guide 7 is omitted, the sheet table 2 The upper surface of the becomes the conveyance guide surface.

[0024]

As described above, the invention according to claim 1 is rotationally driven by abutting on a sheet table on which a plurality of sheets are placed and the lower surface side of the sheets placed on the sheet table. A transport roller that transports these sheets by
In a separation / conveyance device having a separation roller which is located downstream in the conveyance direction of the sheet and is rotationally driven, and a sheet separation piece which is pressed against the outer peripheral surface of the separation roller with a predetermined pressure, the conveyance roller conveys the sheet. An intermediate roller having a shaft center parallel to a conveyance guide surface with which the lower surface of the sheet is in sliding contact and orthogonal to the conveyance direction of these sheets is arranged between the conveyance roller and the separation roller. A first cutout portion having a substantially L-shaped cross section cut in by two planes that are substantially orthogonal to each other while the front end portion of the sheet placed on the sheet table is inserted is formed in the outer peripheral portion of the intermediate roller; A slight distance from the conveyance guide surface when the intermediate roller is rotated to a position where the leading end of the sheet, which has entered the first cutout, deviates from the first cutout. With a second notch portion facing and parallel to form the outer periphery of the intermediate roller, since the intermediate roller provided with a rotation control unit for controlling rotation to the predetermined rotational position,
By controlling the rotation of the intermediate roller, it is possible to surely arrange the leading ends of several sheets reaching the contact portion between the separating roller and the sheet separating piece in a wedge shape, and thus to separate the sheets one by one. It is possible to reliably carry the sheet, and therefore, it is possible to prevent double feeding and non-feeding. In addition, the control which conventionally used two parts, a stopper and a gate, is performed using only the intermediate roller. Therefore, there is an effect that the size of the entire apparatus can be reduced by reducing the number of parts and saving the installation space.

According to the second aspect of the invention, as described above, in the first aspect of the invention, the position where the first notch faces the upstream side in the sheet conveying direction and the position where the second notch faces the sheet conveying guide surface. Since the rotation control unit that reciprocally rotates the intermediate roller is provided, the structure for controlling the rotation of the intermediate roller can be simplified, so that the cost can be reduced, and the rotation control of the intermediate roller can be reliably performed. It is possible,
As a result, it is possible to surely separate and convey the sheets one by one, and it is possible to reliably prevent double feeding and non-feeding.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a rotation position of an intermediate roller and a state of a sheet.

FIG. 3 is a side view showing a state in which a sheet in a conventional example is placed on a sheet base.

FIG. 4 is a side view showing a state after the sheet conveyance in the conventional example is started.

FIG. 5 is an explanatory diagram showing how to align the leading ends of the sheets that are separated and conveyed.

[Explanation of symbols]

 1 Sheet 2 Sheet Stand 5 Conveyor Roller 6 Conveyor Guide Surface 8 Separation Roller 9 Sheet Separation Piece 12 Intermediate Roller 13 First Cutout 14 Second Cutout

Claims (2)

[Claims] 1. A sheet base on which a plurality of sheets are placed, and a conveyance roller for abutting the lower surface side of the sheets placed on the sheet base and rotationally driving the sheets to convey these sheets. In a separating / conveying device having a separating roller which is located downstream in the conveying direction of the sheet and is rotationally driven, and a sheet separating piece which is pressed with a predetermined pressure on the outer peripheral surface of the separating roller, the separating roller conveys the sheet. An intermediate roller having a shaft center parallel to a conveyance guide surface with which the lower surface of the sheet is in sliding contact and orthogonal to the conveyance direction of these sheets is disposed between the conveyance roller and the separation roller. Then, the first cutout portion having a substantially L-shaped cross section cut in by the two planes that are substantially orthogonal to each other while the front end portion of the sheet placed on the sheet stand is inserted into the middle portion. When the intermediate roller is formed on the outer peripheral portion of the roller and the leading end portion of the sheet that has entered the first cutout portion deviates from the first cutout portion, there is a slight gap with respect to the transport guide surface. Second cutouts facing each other in parallel are formed on the outer peripheral portion of the intermediate roller,
A separating / conveying apparatus, characterized in that a rotation control unit for controlling the rotation of the intermediate roller to a predetermined rotation position is provided. 2. A rotation control unit for reciprocally rotating the intermediate roller between a position where the first cutout portion faces the upstream side in the sheet conveying direction and a position where the second cutout portion faces the conveyance guide surface. The separating and conveying apparatus according to claim 1.