JPH0480094A - Page turning over apparatus - Google Patents

Abstract

PURPOSE:To certainly turn over a paper sheet toward the bound part of a booklet and to successively return paper sheets of the layer lower than the uppermost layer in the direction opposite to the bound part by detecting the rotary direction of a reverse roller and altering the pressure force of an ultrasonic vibrator to the paper sheet in two stages on the basis of the detection signal. CONSTITUTION:A rotation detecting means such as a rotary encoder or an endless potentiometer detecting the rotary direction of a reverse roller 2 and a pressure altering means altering the pressing force of an ultrasonic vibrator 1 to a booklet 3 in two stages on the basis of the detection signal of the rotation detection means are provided. This pressure altering means can increase the pressing force of the ultrasonic vibrator 1 to the booklet 3 when the paper sheet 31 of the uppermost layer of the booklet 3 is turned over toward a bound part 4 by the ultrasonic vibrator 1 and can reduce the pressing force of the ultrasonic vibrator 1 to the booklet 3 when the paper sheet of the next layer is returned to the right by the reverse roller 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a page turning device for turning over bound sheets of paper.

Conventional technology Automation of office work in offices, that is, OA, has become widespread in recent years, but the handling of paper sheets still requires manual intervention, and there are many problems in improving work efficiency. Furthermore, the amount of paper used continues to increase, contrary to expectations for a paperless society due to the development of information equipment. Paper leaves are handled in a wide variety of ways, and turning the pages of booklets such as books and magazines is a simple but difficult field to mechanize. Mechanization is required for devices, recording devices that record information on booklets, and the like.

Currently, automatic page turning devices for bank passbooks are in practical use, and since both the cover and inner paper are made of highly rigid and uniform paper quality, and the size is constant, page turning is possible. is relatively easy to do. On the contrary,
Booklets handled by the above-mentioned scanners, photographing devices, recording devices, etc. vary greatly in size and paper quality, making it difficult to prevent multiple turning. As a result, in many places pages are turned manually.

For this reason, as described in Japanese Patent Application Laid-Open No. 60-122932, the pages of the opened booklet are raised while being curved by the rotational movement of the page separation arm, and the paper sheets are formed on the inside of the raised paper sheets. There is an invention in which pages are turned by moving a page moving arm inserted into a gap between pages.

In addition, as described in Japanese Patent Application Laid-open No. 61-233593, paper sheets are separated using an arm equipped with a suction device, and pages are turned by blowing air. There is an invention in which a plurality of sheets of paper are separated by a flexible vinyl claw when the sheets are sucked.

Furthermore, as described in Japanese Unexamined Patent Publication No. 61-284492, there is an invention in which page turning is performed by rotating a suction roller in contact with a sheet of paper.

Furthermore, as described in Japanese Patent Application Laid-Open No. 63-107593, page turning is performed by bringing a rotating friction roller into contact with the paper sheet, and when the paper sheets overlap and are turned over, multiple sheets are overlapped at the initial stage. There is an invention in which the second and subsequent sheets of paper are pushed back using anti-turning cola.

Furthermore, as described in JP-A-56-7847, when a pair of friction rollers are rotated in the same direction and a plurality of sheets of paper are inserted between these friction rollers, One friction roller feeds the top layer of paper in one direction, while the other friction roller sequentially returns the next layer of paper in the opposite direction starting from the bottom layer, thereby preventing multiple feeding of paper sheets. There is a sheet feeding device.

Problems to be solved by the invention JP-A-60-122932 and JP-A-61-23
The invention described in Japanese Patent No. 3593 lacks reliability because it is difficult to stop the tip of the arm at an accurate position, and it is also difficult to operate the arm at high speed. In particular, the device described in Japanese Patent Application Laid-Open No. 61-233593 requires a suction device, making it difficult to miniaturize the device. The inventions described in JP-A-61-284492 and JP-A-63-107593 use rollers, but the invention described in JP-A-61-284492 requires a suction device. This requires a large-scale device, and there are no measures to prevent multiple page flipping. The invention described in JP-A-63-107593 has low reliability in preventing multiple turning. Unexamined Japanese Patent Publication 1986-7
The invention described in Publication No. 847 can separate the stacked tickets one by one, but since the friction roller simply rotates, it is impossible to turn the pages of the booklet. Since the paper sheet is held between the pair of friction rollers, the apparatus becomes large in size, and furthermore, means for inserting the paper sheet between the friction rollers is required.

Means for Solving the Problems The invention as claimed in claim 1 provides a plurality of rollers which are each pressed against the surface of a sheet of paper in an opened booklet and are driven at different phases in the direction of turning the sheet of paper toward the binding portion thereof. a sound wave vibrator;
A force is applied toward the surface of the sheet at a position that is slightly farther from the binding section than the ultrasonic transducer, and is opposite to the direction in which the sheet is conveyed by the ultrasonic vibrator via a torque limiter. a reverse roller receiving a driving force in a direction; a rotation detection means for detecting the rotation direction of the reverse roller; and a pressure force applied by the ultrasonic vibrator to the sheet of paper is changed in two stages based on a detection signal from the second rotation detection means. The pressure switching means is comprised of a pressure switching means.

According to a second aspect of the present invention, in the first aspect, a synchronizing means is provided for synchronizing the drive timing of the reverse roller with the pressurization of the ultrasonic transducer against the paper sheet.

The invention according to claim 1 provides an ultrasonic wave to the paper sheet by increasing the pressing force of the ultrasonic vibrator against the paper sheet using the pressure switching means when the ultrasonic vibrator and the reverse roller are brought into pressure contact with the same surface of the paper sheet. The vibrator can reliably turn the booklet toward the binding side, and at this time, the frictional force between the sheets is smaller than the frictional force between the sheets against the ultrasonic vibrator and the reverse roller.
When only one leaf is turned over, the reverse roller is rotated to follow the conveying force of the paper sheet, which resists the torque of the torque limiter. However, when multiple sheets are turned over, the top layer Immediately after a sheet passes through the reverse roller, when the trailing edge of the underlying sheet contacts the reverse roller, the torque of the torque limiter exceeds the frictional force between the sheets, so the ultrasonic vibrator is used to transport the sheet. The driving force in the opposite direction is transmitted to the reverse roller via the torque limiter, and thereby the paper sheets from the top layer to the lower layer can be sequentially returned in the opposite direction from the binding section. A rotation detector detects a change in the rotational direction of the reverse roller when the paper sheet changes, and based on the detection signal, the pressure switching means lowers the pressing force of the ultrasonic vibrator against the paper sheet, thereby ensuring the return action of the reverse roller. In addition, there are moments when the pressing force of each ultrasonic transducer against the paper sheet decreases depending on the period of voltage application, but since multiple ultrasonic transducers are driven with different phases, It is possible to maintain the state in which the paper sheets are pressed against each other by any of the ultrasonic transducers, and thereby there is no possibility that the uppermost layer of paper sheets to be turned over will be pulled back by the reverse roller.

According to the second aspect of the invention, since the reverse roller is driven only when the ultrasonic vibrator presses the paper sheet, there is no possibility that the uppermost sheet of paper to be turned over will be bent back by the reverse roller.

Embodiment An embodiment of the invention of claim 1 will be described based on FIGS. 1 to 7. 1 is an ultrasonic vibrator, and 2 is a reverse roller, which is connected to a counterclockwise rotating motor (not shown) via a torque limiter (not shown). 3 is a booklet in which a large number of sheets of paper are bound by a binding section 4. The ultrasonic vibrator 1 and the reverse roller 2 are urged downward so as to contact the surface of the booklet 3 on the same surface,
This reverse roller 2 is arranged at a position slightly farther from the binding section 4 than the ultrasonic transducer 1. Also,
The ultrasonic transducer 1 is constructed by, for example, one end of a vertically displaceable laminated piezoelectric element 1b, lc fixed, and the other end of which is joined to a vibrating body 1a. By applying drive voltage signals having a phase difference, an elliptical motion is generated in the vibrating body 1a pressed against the sheet of paper, thereby moving the sheet of paper toward the binding section 4. In this embodiment, a plurality of ultrasonic transducers 1 are arranged so as to be driven with different phases. FIG. 4 shows an array configuration of ultrasonic transducers 1 driven with a phase shift of 180°, and FIG. 5 shows an array configuration of ultrasonic transducers 1 driven with a phase shift of 120′. Further, the ultrasonic transducers 1 are arranged in a line as shown in FIG. 6, or
They may be arranged in two rows as shown in FIG. Further, the outer circumferential surfaces of the ultrasonic vibrator 1 and the reverse roller 2 are formed of a material whose coefficient of friction against paper sheets is larger than the coefficient of friction between sheets.

Further, a rotation detection means (not shown) such as a rotary encoder or an endless potentiometer for detecting the rotation direction of the reverse roller 2, and a detection signal of the rotation detection means are used to detect the ultrasonic transducer 1 for the booklet 3.
A pressure changing means (not shown) is provided for changing the pressurizing force in two stages. This pressure changing means has a structure in which, for example, a support body holding one end of a spring that urges the ultrasonic vibrator 1 downward is displaced in two stages by a drive unit such as a motor or an electromagnet. It is not limited to structure. Further, this pressure changing means increases the pressing force of the ultrasonic transducer 1 against the booklet 3 when the ultrasonic transducer 1 turns over the uppermost sheet 31 of the booklet 3 toward the binding section 4, and The paper sheet 32 in the layer is transferred to the reverse roller 2
When the booklet 3 is returned to the right, the pressing force of the ultrasonic transducer 1 against the booklet 3 is reduced.

In such a configuration, as shown in FIG. 1(a),
The ultrasonic transducer I and the reverse roller 2 are connected to the uppermost sheet of paper 3.
When the ultrasonic transducer 1 is brought into pressure contact with the same surface of the paper sheet 31, the pressing force of the ultrasonic transducer 1 against the paper sheet 31 is increased by the pressure switching means. Therefore, as shown in FIG. 1(b), when the ultrasonic transducer 1 is driven, the sheet 31 can be reliably turned over toward the binding section 4 of the booklet 3. At this time, due to the frictional force of the paper sheet 31 against the ultrasonic transducer 1 and the reverse roller 2, the paper sheets 31, 32
Since the frictional force between
When only one leaf is turned over, the reverse roller 2 rotates clockwise due to the conveyance force of the paper sheet 31 that resists the torque of the torque limiter. , as shown in FIG. 1(C), immediately after the uppermost sheet 31 passes through the reverse roller 2, when the trailing edge of the lower layer sheet 32 contacts the reverse roller 2, the sheet 31.32 Since the torque of the torque limiter exceeds the frictional force between As shown in Figure (d), the sheets 32 below the top layer can be sequentially returned in the opposite direction to the binding section 4.

At this time, the ultrasonic transducer 1 is stopped, and the rotation detection means detects the counterclockwise reversal movement of the reverse roller 2 to reduce the pressing force of the ultrasonic transducer 1 against the paper sheet 31. , the return action by the reverse roller 2 can be performed reliably. FIG. 1(e) shows a state in which the next layer of paper 32 is returned to its original position, and the paper 32 is curved upward.
Insert a hook (not shown) into the space 5 inside the paper sheet 31, remove the pressing force of the ultrasonic transducer l against the paper sheet 31, move this hook to the left, or move the hook to the left without using the hook. By moving the sonic transducer l toward the binding section 4, the top layer of paper sheets 31 can be turned over to the left.

Here, FIG. 2 shows the initial state of the sheet turning operation in FIG. 1(b). In FIG. 2, T21 is the pressing force of the ultrasonic transducer 1 against the booklet 3, T22 is the pressing force of the reverse roller 2 against the booklet 3, T3 is the frictional force between the paper sheets under the ultrasonic vibrator 1, fh is the frictional force between the paper sheets under the reverse roller 2, μ is the friction coefficient between the ultrasonic transducer 1 and the reverse roller 2 and the paper sheets, μ is the friction coefficient between the paper sheets, and R is the friction force between the paper sheets under the reverse roller 2. Assuming that the radius of the reverse roller 2, T1, is the torque of the torque limiter that allows the rotation of the reverse roller 2 to follow the conveyance force of the paper sheet turned over by the ultrasonic transducer l, the conditions for making the reverse roller 2 follow the rotation in the clockwise direction are as follows. Represented by Eq.

= ball ten μpf21+μp f22,',T,<R((μ, −μ,)T2.−μ, T22
)...■ Similarly, FIG. 3 shows a state in which the paper sheet 32 is returned to the right by the reverse roller 2 in FIG. 1(d).

In FIG. 3, f3. is the pressing force of the ultrasonic vibrator 1 against the booklet 3, f31 is the pressing force of the reverse roller 2 against the booklet 3, f is the frictional force between the paper sheets under the ultrasonic vibrator 1,
fd is the frictional force between sheets under reverse roller 2, T2
If is the torque of the torque limiter required to drive the reverse roller 2 counterclockwise, and R1μ1,μ is the same as above, the conditions for driving the reverse roller 2 counterclockwise are expressed by the following equation. .

F > 2 fr+f, = 2μ, f3. +μp f 31
,',T2)R(2μ2f3, 10μ, f32)...■
As described above, if the conditions for causing the reverse roller 2 to follow the ultrasonic transducer 1 and the conditions for driving it counterclockwise are considered individually, the torques T1 and T2 of the torque limiter will be different. Generally, the torque of the torque limiter is constant, so if the outer periphery of the ultrasonic vibrator 1 and reverse roller 2 is made of rubber, and the paper sheet is selected from common paper materials, μ
,〉l.

0, μ, (about 0.75), and if the worst value is taken, it becomes T, (T, so it is difficult to satisfy 1 and 2 at the same time.

Therefore, as mentioned above, the pressing force f, 7 of the ultrasonic vibrator 1 against the needle 3 at the initial stage of the page turning operation, that is, in the state shown in FIG. 1(b) and FIG. The state in which the roller 2 is driven counterclockwise, that is, the first
The pressing force f3 of the ultrasonic transducer l against the booklet 3 in the states shown in FIG. □=f3□, T, =T2 can be satisfied.

Furthermore, although there are moments when the pressing force of each ultrasonic transducer 1 against a paper sheet decreases depending on the period of voltage application, since the plurality of ultrasonic transducers 1 are driven with different phases, any one of the ultrasonic transducers 1 is always The vibrator 1 can maintain the state in which the paper sheets are pressed against each other, thereby eliminating any possibility that the uppermost layer of paper sheets to be turned over will be pulled back by the reverse roller 2. Here, an example of a synchronizing means for synchronizing the drive timing of the reverse roller 2 with the pressurization of the ultrasonic transducer 1 against a sheet of paper will be described. For example, there is a method in which the motor of the reverse roller 2 is driven by an input voltage calculated from changes in the input voltage to the vertical displacement type laminated piezoelectric element 1b of the ultrasonic transducer 1, IC, etc.

Next, an embodiment of the invention according to claim 2 will be described based on FIG. 8. According to the second aspect of the invention, as shown in FIG. 8(a), there is a period when the ultrasonic transducer 1 vibrates in an elliptical shape and leaves the paper sheets. By stopping the reverse roller 2, there is no possibility that the uppermost sheet of paper 31 to be turned is pulled back by the reverse roller 2, and the reverse roller is activated only when the ultrasonic transducer 1 presses the sheet as shown in FIG. 8(b). 2. In the state shown in FIG. 8(b), the reverse roller 2 follows and rotates counterclockwise due to the tensile force of the uppermost sheet 3.

Effects of the Invention The invention of claim 1, as described above, includes a plurality of rollers that are each pressed against the surface of a sheet of an opened booklet and driven with different phases in the direction of turning the sheet of paper toward the binding section. A sonic transducer is biased toward the front surface of the sheet at a position slightly farther from the binding section than the ultrasonic vibrator, and the ultrasonic vibrator generates a wave of the sheet through a torque limiter. A reverse roller receiving a driving force in a direction opposite to the conveyance direction, a rotation detection means for detecting the rotation direction of the reverse roller, and a detection signal from the rotation detection means to determine the pressing force of the ultrasonic vibrator against the paper sheet. Since the configuration includes a pressure switching means that changes in two stages, when the ultrasonic vibrator and the reverse roller are pressed against the same surface of a sheet of paper, the pressure switching means increases the pressing force of the ultrasonic vibrator against the sheet of paper. This allows the ultrasonic vibrator to reliably turn the sheet of paper toward the bound side of the booklet, and at this time, the frictional force between the sheets is smaller than the frictional force of the sheet against the ultrasonic vibrator and reverse roller. Therefore, when only one sheet of paper is turned over, the reverse roller is rotated to follow the conveying force of the sheet that resists the torque of the torque limiter, but when multiple sheets of paper are turned over, the maximum Immediately after the upper layer of paper passes through the reverse roller, when the trailing edge of the lower layer of paper comes into contact with the reverse roller, the torque of the torque limiter exceeds the frictional force between the sheets. A driving force in the opposite direction to the conveyance direction can be transmitted to the reverse roller via the torque limiter, which allows the sheets below the top layer to be sequentially returned in the direction opposite to the binding section. A rotation detector detects the change in the rotation direction of the reverse roller at the time of rotation, and based on the detection signal, the pressure switching means lowers the pressure applied by the ultrasonic vibrator against the paper sheet, thereby ensuring the return action of the reverse roller. In addition, there are moments when the pressing force of each ultrasonic transducer against the paper sheet decreases depending on the period of voltage application, but since multiple ultrasonic transducers are driven with different phases, It is possible to maintain the state in which the paper sheets are pressed by one of the ultrasonic transducers, and this has the effect of eliminating the possibility that the top layer of paper sheets to be turned over will be pulled back by the reverse roller. have

As described above, the invention of claim 2 is provided with a synchronizing means for synchronizing the drive timing of the reverse roller with the pressurization of the ultrasonic vibrator against the sheet of paper, so that the ultrasonic vibrator does not press the sheet of paper. Since the reverse roller is driven only when pressure is applied, there is an effect that there is no possibility that the uppermost sheet of paper to be turned over will be pulled back by the reverse roller.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the invention according to claim 1, in which FIG. 1 is a front view showing the structure together with the page turning operation, FIG. 2 is a front view showing the initial state of the page turning operation, Third
The figure is a front view showing the return operation of paper sheets by the reverse roller, Figures 4 and 5 are front views showing the arrangement of the ultrasonic transducers, and Figures 6 and 7 are the arrangement of the ultrasonic transducers. The perspective view and FIG. 8 are front views showing the operation of the ultrasonic transducer and the reverse roller according to an embodiment of the invention according to claim 2. 1... Ultrasonic vibrator, 2... Reverse roller, 3...
...Booklet, 4...Binding section, 31.32...Paper leaf" Go figure 37 figure", % 3 figure drying C drying d.

Claims (1)

[Scope of Claims] 1. A plurality of ultrasonic transducers each pressed against the surface of a paper sheet of an opened booklet and driven with different phases in the direction of turning the paper sheet toward its binding side; At a position where the distance from the binding section is slightly farther than the ultrasonic transducer, the sheet is biased toward the front side of the sheet, and is also biased via a torque limiter in a direction opposite to the direction in which the sheet is conveyed by the ultrasonic vibrator. a reverse roller receiving a driving force; a rotation detecting means for detecting the direction of rotation of the reverse roller; and a pressure for changing the pressing force of the ultrasonic vibrator against the paper sheet in two stages based on a detection signal from the rotation detecting means. A page turning device characterized by comprising a switching means. 2. The page turning device according to claim 1, further comprising a synchronizing means for synchronizing the drive timing of the reverse roller with the pressure applied by the ultrasonic vibrator to the paper sheet.