JPS63230454A - Sheet reversing device - Google Patents

Abstract

PURPOSE:To obtain a compact and simplified structure for reversing a sheet in a short time for use in a copying machine or the like by, only at reversing of such a sheet, bringing sheet press means in contact against a reversing roller to hold the sheet therebetween, so that the sheet may travel around the reversing roller to be reversed. CONSTITUTION:There are provided auxiliary rollers 114 each deposed between adjacent two of conveyer belts 102. With a reversing roller 104 rotating in a direction f, a sheet 1 conveyed by belts 101 is brought near the auxiliary rollers 114, which is detected to activate a solenoid 116. Thus, the auxiliary rollers 114 are moved upwardly by an auxiliary roller lifting link 118 to be brought in contact against the reversing roller 104, so that the leading end of the sheet 1 is held therebetween and passes between a winding guide 119 and a reversing guide 111 to be sent out on the belts 101 in the reversed condition. Then, the auxiliary rollers 114 are lowered by a return coil 117 to convey the reversed sheet in a direction d. Thus, the sheet can be reversed in a simple and compact structure in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet reversing device that has a compact structure and is capable of reversing sheets such as copy paper or photographic originals used in copying machines, microfilm photographing devices, and the like.

(Technical background and problems to be solved) Conventionally, when making double-sided copies with a copying machine, or when photographing double-sided originals with a microfilm photographing device, it was not possible to reverse these sheets. It is being done. A conventional example of this sheet reversing device will be described with reference to FIGS. 5(8) and 5(B).

The sheet I/reversing device shown in FIG. As shown in the figure, it rotates around once and then reverses itself.

However, in this loop type sheet reversing device lO, the device lO
Since the Q itself becomes a big loss, extra space is required, and there is also the problem that the reversal time is too long.

The sheet reversing device shown in FIG. 5(B) has a T-shaped switchback type reversing device 20, in which a plurality of opposite pairs of rollers 21 are lined up and belts 22 and 23 are mounted on each side. The sheet 1 is conveyed on one belt 22 as shown by the arrow in the figure, and enters while being held between the pair of rollers 21, until the rear end of the sheet 1 reaches the opposite pair of rollers 21. Then, the roller 21 rotates in the opposite direction so that the reversed sheet on the other heald 23 is conveyed as shown by arrow C in the figure.

However, even with this T-shaped switchback type sea/reversing device 20, the device 20 itself becomes a big loss, requiring extra space, and there is a problem that the entire device such as a copying machine or photographing device cannot be made compact. .

(Object of the invention) This invention was made under the above circumstances,
An object of the present invention is to provide a sheet reversing device that has a compact structure and can shorten the reversing time.

(Means for Solving the Problems) The present invention relates to a device for reversing the direction of a sheet such as copy paper or a photographic original. a sheet conveying means, a sheet pressing member that is located in the gap between the plurality of belts and moves up and down, and a sheet pressing member that cooperates with the sheet pressing member to clamp and wrap the sheet i. and a reversing roller installed opposite to the
This is achieved by including a reversing guide that guides the sheet to wrap around the reversing roller along the outer periphery of the reversing roller.

(Function of the Invention) According to the present invention, when reversing a sheet, the sheet pressing member and the reversing roller come into contact, and the sheet is sandwiched and wound around the reversing roller to be reversed.

(Embodiment of the invention) FIG. 1 shows a sheet reversing device IC used when photographing a double-sided document (a document with information recorded on both sides (hereinafter referred to as "sheet 1")) on microfilm, etc. according to the present invention.
10 is a belt conveyor type in which a plurality of thin belts 101 are arranged in parallel with a predetermined gap, and a conveyor belt 102 having a function of conveying a sheet 1 in the direction of arrow d, and a conveyor belt 102 The reversing roller 104 is disposed opposite to the belt roller 103 at one end with a gap therebetween, and rotates in the opposite direction (in the direction of the arrow f) to the rotation of the belt roller 103 (in the direction of the arrow e). Reversing roller 104
The belt 11 is connected to a pulley 106 fitted on the end of the first shaft 105 of the motor 107 and a pulley 109 on the end of the output shaft 108 of the motor 107.
0 is applied to rotate the reversing roller 104.

Further, a belt-shaped plate having a length approximately equal to the length of the reversing roller 104 starts near the center of the gap between the reversing roller 104 and the conveyor belt I-102, wraps around the reversing roller 104 so as not to contact the outer circumferential surface of the reversing roller 104, and has the other end. Conveyor belt 1 at the base
The reversing guide 111 is approaching towards the source of 02,
The reversing guide 111 is located between the hem-shaped portion and the reversing roller 104, and has a guide 119 that is approximately equal in length to the reversing roller 104.

Further, a second shaft 113 parallel to the first shaft 112 of the belt roller 103 is inserted into the side gap of the conveyor belt 102, and on this second shaft 113, a plurality of belts 101 constituting the conveyor belt 102 are inserted. An auxiliary roller 114 is fitted at a position that matches each gap. Then, this second shaft 113 moves upward (in the direction of arrow g) about the third shaft 115 as a fulcrum of the solenoid 116. It is pivotally supported by an auxiliary roller lifting link 118 that moves downward (in the direction of the arrow) using a return spring 117.

Next, the effects of the above embodiment are shown in FIGS. 2(A) to (D).
This will be explained with reference to a cross-sectional side view of.

With the auxiliary roller 114 positioned in the side gap of the conveyor belt 102, the reversing roller 104 rotates in the direction of arrow f in FIG. The upper sheet 1 is conveyed in the direction of arrow d (FIG. 2 (8)). Sheet 1 is the auxiliary roller 114
, the solenoid 116 is activated and the auxiliary roller 1 is moved together with the auxiliary roller lifting link 118.
14 in the direction of arrow g in FIG. 2(B). The auxiliary roller 114 is rotated in the direction of the arrow by the friction of the reversing roller 104 (FIG. 2(B)). The leading edge of the sheet 1 is held between the auxiliary roller 114 and the reversing roller 104 and rolled up in the direction of the arrow ρ in FIG. 2(C) (FIG. 2(C)). The sheet 1 is slipped between the reversing guide Ill and the guide 119 by the kite 119, is sent out along the groove-shaped portion of the reversing guide 111, and is conveyed to the belt 1.
01” falls to the second. Here, the auxiliary roller 114 is pulled down in the direction of the arrow in FIG. 2(D) by the return spring 117, and the inverted sheet].1 is conveyed in the direction of the arrow d.

(Modification of the Invention) As shown in FIG. 3, it is also effective to use a guide block 120 made of a material with a low coefficient of friction, such as plastic, in place of the auxiliary roller 114.

Further, the position of the sheet 1 may shift while the sheet 1 is being conveyed or reversed. Therefore, as shown in FIG. 4, it is also effective to provide an abutting portion 121 at the tip of the reversing guide 111 so that the tip of the sheet 1 that has been reversed abuts, thereby correcting the position of the sheet 1.

(Effects of the Invention) As described above, according to the sheet reversing device of the present invention, the device can be made compact and simple in structure, so that costs can be reduced and the reversing time can be shortened. Therefore, it can also handle high-speed processing.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of a sheet reversing device according to the present invention;
Figures 2 (8) to (D) are cross-sectional side views showing the operating state of the present invention, Figures 3 and 4 are cross-sectional side views showing modified examples of the present invention, and Figures 5 (8) and (B ) is a schematic diagram of a conventional sheet reversing device. 1... Sheet, 100... Sheet reversing device, 102
... Conveyance belt, 104 ... Reversing roller, +11.
...Reversing guide, 114 river auxiliary roller.

Claims (1)

[Claims] A sheet conveying means consisting of a plurality of belts arranged in parallel with a gap between them, a sheet pressing member that is positioned in the gap between the plurality of belts and moves up and down, and a sheet pressing member that cooperates with the sheet pressing member to sandwich the sheet. , a reversing roller disposed opposite to the sheet pressing member for winding, and a reversing guide provided with a gap and guiding the sheet to be wound around the reversing roller along the outer periphery of the reversing roller. A sheet reversing device characterized by comprising: