JPS63230453A - Sheet reversing device - Google Patents

Abstract

PURPOSE:To obtain a compact structure for reversing a sheet in a short time for use in a copying machine or the like by, at detection of entry of such a sheet, holding the sheet between a pair of rollers and rotating the entire rollers. CONSTITUTION:When a motor 115 is rotated in the forward direction with second and fourth gears 108, 114 being in engagement with each other, first and second rollers 103, 104 rotate in the forward direction and a sheet 1 printed on the front surface is conveyed by a sheet printing/conveying device 101, and when the leading end of the sheet 1 held between the rollers 103, 104 is detected by a sensor 123, a solenoid 120 is actuated to lift a stopper 121, so that lock of rotators 109 is released and the conveying device 101 is stopped. A clutch 111 is operated to release engagement between the gears 108, 114 and to engage the rotator 109 with a gear 113, so that the rollers 103, 104 with the sheet 1 held therebetween are rotated through 180 degrees to reverse the sheet 1. Thus, the sheet 1 can be rapidly, accurately and stably reversed by a simple and compact sheet reversing device.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical division of the invention) The present invention provides a sheet reversing system that allows sheets of copy paper or photographic originals used in copying machines, microfilm photographing devices, etc. to be reversed with a compact structure. Regarding equipment.

(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 necessary to invert the sheets. It is familiar. A conventional example of this sheet reversing device is shown in Fig. 6 (A
) and CB>.

The sheet reversing device shown in FIG. 6 (8) is a loop type reversing device 10, in which a plurality of rollers 11 and a belt 12 form a loop, and the sheet 1 is moved along the belt 12 by the arrow a.
As shown in the figure, it rotates around once and then reverses itself.

However, in this loop type sheet reversing device IO, the device 1
Since 0 itself becomes a big loss, extra space is required, and there is also a problem that the reversal time is too long.

The sheet reversing device shown in FIG. 6(B) is a T-shaped switchback type reversing device 20, in which a plurality of opposing rollers 21 are arranged parallel to each other, and rollers 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, is sandwiched between a pair of rollers 21, and then enters the pair of rollers 21 at the rear end or entrance of the sheet 1. When the belt 23 reaches the belt 23, the roller 21 rotates in the opposite direction, and the sheet 1 is reversed and conveyed as shown by arrow C in the figure.

However, this T-shaped switchback type seat reversing device 2
Even if it is zero, the device 20 itself will be damaged and extra space will be required, which poses a problem that the entire device such as a copying machine or a 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 a copy paper or a photographic original.
a sheet conveying means for conveying the sheet; a sheet discharging means disposed opposite to the sheet conveying means for discharging the sheet; and a sheet for detecting that the leading edge of the sheet has reached the sheet discharging means]-detection a pair of first and second rollers disposed between the sheet conveying means and the sheet discharging means and sandwiching the sheet;
and a rotator that pivotally supports the shaft end of the second roller and rotates the entirety of the first and second rollers sandwiching the sheet based on detection by the sheet detection means to reverse the sheet. This is achieved by having the following.

(Function of the Invention) The present invention detects the entry of a sheet and rotates the rollers that hold the sheet together, thereby making it possible to reverse the sheet.

(Embodiment of the Invention) FIG. 1 shows a sheet reversing device 10 used when photographing a double-sided document (a document with information recorded on both sides (hereinafter referred to as "Sheet 1")) on microfilm or the like according to the present invention.
0 is shown in a schematic perspective view. This sheet reversing device 100 includes a photographing stage for photographing the sheet 1 onto a microfilm (not shown), a sheet photographing/conveying section 101 in the form of a belt conveyor having a function of conveying the photographed sheet 1, and a sheet photographing/conveying section] A paper ejecting section 102 that ejects the sheet 1, which is disposed opposite to the end of the sheet 01, and a sheet photographing/conveying section 10.
A pair of opposing first rollers 103 and second rollers 10 are provided between the sheet 1 and the sheet discharge section 102, and sandwich and reverse the sheet 1 conveyed by the sheet photographing/conveying section 101.
The rotator 109 consists of four rotators.

A first gear 107 and a second gear 108 are fitted into the 11ill 1105 and the second shaft 106 extending from both ends of the first roller 103 and the second roller 104, respectively. 2nd gear +
08 are interlocking with each other. Furthermore, the ends of the first shaft 105 and the second shaft 106 are pivotally supported on one end surface of the rotator 109, and the rotator 109 is provided at the center of the other end surface.
A rotating shaft 110 is fixedly attached.

A clutch 111 is located at the outer lower part of one rotator 109.
A third gear 113 that meshes with the rotator 109 and a fourth gear 114 that meshes with the first gear 107 or the second gear 108 are disposed on a third shaft 112 extending from the clutch 111. They are fitted in such a way that they interlock alternately. Further, a motor 115 is provided at the lower inner side of the first gear 107 and the second gear 108.
is provided, and a fifth gear 117 that always meshes with the fourth gear 114 is fitted onto the fourth @jlle extending from the motor 115.

Cams 118 are fixed at two positions on the outer end surface of the other rotator 109 at an interval of 180 degrees, and a microswitch 119 for reversal positioning is provided at a position where the cams 118 can be switched. Further, a solenoid 120 and a wedge-shaped stopper 121 are provided at the second part of the rotator 109 to stop or release the rotator 109 by moving it up and down by the solenoid 120.

On the sheet discharge section 102, there are a first roller 103 and a second
A sheet detection sensor 123 is provided that detects the leading edge of the sheet 1 that has passed between the rollers 104 and sends a switching signal to the clutch 111, the sheet photographing/conveying section 101, and the solenoid 1j120.

Next, Figure 2 (8), (B) to Figure 4 (8),
The operation of the sheet reversing device 100 of the present invention will be described with reference to a cross-sectional side view and a plan view of the sheet reversing device 100 shown in (B) and a time chart shown in FIG.

As shown in FIG. 2(B), when the motor 115 rotates (normally rotates) with the second gear 108 and the fourth gear 114 engaged, the first roller 103 and the second roller 1
04 rotates in the directions of arrows d and e in Figure 2 (8) (normal rotation)
At the same time, the sheet photographing/conveying unit 101 rotates (normally rotates) in the direction of arrow f, and conveys the sheet 1 whose front surface has been photographed in the direction of arrow g. When the sheet 1 is conveyed to the end of the sheet photographing/conveying section 101, the first guide plate 12
2, the first roller 103 and the second roller 111
The sea h l moves in the direction of the arrow.

When the leading edge of the sheet 1 is detected by the sheet detection sensor 123 (time t1 in FIG. 5), the solenoid 120 is actuated, and the stopper 121 is moved upward and the rotator 10 is
At the same time as canceling the stop of 9, the sheet photographing/conveying section +01
stops.

Furthermore, at time t2, the clutch 111 is activated to move the third shaft 112 and move the second gear 108 and the fourth gear 114.
At the same time, the rotator 109 and the third gear 1 are separated.
13 (Fig. 3 (B)).

Then, the second guide plate 124 comes off from the end of the paper discharge section 102, and the first roller 103 and the second roller 104 sandwich the sheet 1! Figure 3 (with sesame rotator 109)
When rotated in the direction of the arrow 8), the microswitch 11g for reversal positioning separates from the contact 118 and turns off.

Then, the rotator 109 rotates 180 degrees (at time t3)
When the contact 118 contacts the micro switch 119 and turns on, the motor 115 stops, the clutch III operates, moves the third shaft 112, and disconnects the rotator 109 and the third gear 113. At the same time the second
Engage the kia 108 and the fourth kia 114 (Fig. 4 (B)).

Furthermore, at time 14, the solenoid 120 is activated,
The stopper 121 is lowered to stop the rotator 109, and the sheet photographing/conveying unit 101 rotates (reversely) in the direction of the arrow °C in FIG. and the second roller 104 is rotated (reversely) in the directions of arrows m and n, respectively. Therefore,
The inverted sheet 1 moves in the direction of arrow 0, and the sheet photographing/conveying section 101 conveys the sheet 1 in the direction of arrow p.

When the sheet 1 is conveyed to the location where the back side is photographed ((time point: 5), the motor 115 and the sheet photographing/conveying unit 101 stop. Then, when the photographing operation is completed (time t6), the sheet photographing/conveying unit +01 again rotates (normally rotates) in the direction of the arrow f in FIG. 2 roller 104 rotates (forward rotation)
do. Then, the above-mentioned operation is repeated from time t7 to t+.
o), C]・1 is flipped onto the surface. In this case, the motor 115 continues to rotate in the normal direction, and the reversed sheet 1 is sent out to the paper delivery section 1 (12), thus the sheet 1
The photographing operation for both sides of the image is completed (at time 111).

Note that the above example describes the case where both sides of sheet 1 are photographed, but in the case of single-sided photographing, sheet 1 only needs to be ejected by the rotation operation in the first half; Needless to say, copy paper is fine.

Further, although gears are used as the drive transmission mechanism in the above description, a belt may also be used, and the mechanism is not particularly limited. Further, the means for detecting the arrival of the sheet 1 at the paper discharge section may be a contact type sensor, a non-contact type sensor, or a timer.

The shape of the stopper is also not particularly limited.

(Effects of the Invention) As described above, according to the present invention, the sheet reversing device can be made into a compact and simple structure, thereby reducing costs, and at the same time, the reversing time is fast and reversing can be performed reliably and stably. Therefore, it can also handle high-speed processing.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention, and FIGS. FIG. 5 is a plan view, a time chart for explaining the present invention in detail, and FIG. 6 (^) and CB) are schematic diagrams showing examples of conventional devices, respectively. 1... Sheet I, 100... Sheet reversing device, 10
1...Sheet photographing/conveying section, 102...Sheet discharge section, 1
03...first roller, 104...second roller. Applicant's agent Yuzo Yasugata/'. Sheep 0 (B) Figure

Claims (1)

[Scope of Claims] A sheet conveying means for conveying a sheet, a sheet discharging means disposed opposite to the sheet conveying means for discharging the sheet, and a means for detecting that the leading edge of the sheet has reached the sheet discharging means. disposed between the sheet detecting means, the sheet conveying means and the sheet discharging means,
A pair of first and second rollers that sandwich the sheet, and a pair of first and second rollers that pivotally support the shaft ends of the first and second rollers and that sandwich the sheet,
A sheet reversing device comprising: a rotator that rotates based on detection by the sheet detecting means and reverses the sheet.