JPH07112858A - Sheet stacking device - Google Patents

Abstract

PURPOSE:To provide a stable stacking operation by clamping a sheet led into a stacking device through a conveying path, between a drive roller and a press contact roller after it is curved by a guide surface of a part of the conveying path in the vicinity of a press contact-point. CONSTITUTION:A drive roller 18 is arranged being inclined in a direction toward a stacking part 100, and a guide roller 151 is located at a position at which the inner wall 150a of a part of the conveying roller 150 in the vicinity of the press contact point P of the drive roller 18 and a press-contact roller 110 crosses a tangential line 120 at the press-contact point P. Further, a fed sheet is diverged from a main conveying path 1 by a gate 2 into the conveying path 150 in which it is curved by the inner wall 150a. The sheet is then clamped between the drive roller 18 and the press-contact roller 110, and is then led into the stacking part 100 while its posture is restrained. At this time, since the sheet is restrained being led along a guide plate 5, and accordingly, it continuously ensure a stable stacking operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet stacking apparatus, and more particularly to a throw-in type stacking apparatus for continuously stacking sheets that are successively conveyed.

[0002]

2. Description of the Related Art A sheet stacking apparatus, particularly a throw-in type stacking apparatus, generally drives an impeller having elastic blades and a drive roller facing the impeller to rotate the sheet above the sheet stacking section. A method is adopted in which a large number of sheets are accumulated and stored by taking them into a predetermined position in space.

The paper sheet conveyed by the conveying means engages with the impeller at the end of the conveying path, and the blades of this impeller are made of a material having higher rigidity than the paper sheet, and The guide member (guide plate 5) for guiding the paper sheets to the stacking box is provided on the side opposite to and overlaps. The paper sheet of the portion engaged with the impeller is pressed by the impeller blades to be deformed. As a result, the paper sheet is deformed into a corrugated shape, so that the apparent rigidity of the paper sheet is increased and the paper sheet is stably conveyed to a predetermined position in the stacking box.

A sheet stacking device is disclosed in, for example, Japanese Patent Laid-Open No.
The technique described in Japanese Patent 1-282995 can be cited.

First, the general operation of the conventional sheet stacking apparatus will be described with reference to FIG. FIG. 10 is a side view of the paper sheet stacking device.

As shown in FIG. 10, a main conveyance path 1 for conveying a paper sheet 4 supplied in the direction of arrow A, a gate 2 for branching the paper sheet 4 from the main conveyance path 1, and a branched paper sheet 4 are shown. A conveying path 150 for guiding, an impeller roller 11 having a plurality of flexible blades 10, and a stacking unit 100 for accumulating and storing the sheets 4 on a holding plate 200 that is vertically driven by a drive source (not shown). And a motor (not shown) that is a drive source of the holding plate 200.

A pressure contact roller 110 is arranged coaxially with the impeller roller 11 and is in pressure contact with the upper drive roller 18. By rotating the drive roller 18 in the clockwise direction, the paper sheet 4 is nipped by the pressure contact roller 110 and carried into the stacking unit 100,
The elastic force of the plurality of blades 10 arranged in a radial pattern is knocked down on the stacking unit 100 to ensure the stacking.

Next, the operation of the paper sheet stacking apparatus thus configured will be described.

First, the paper sheet 4 branched from the main transport path 1 by the gate 2 is guided by the transport path 150,
The impeller roller 1 is rotated by the rotation of a motor (not shown).
By rotating 1 in the counterclockwise direction, the sheet 4 is held by the drive roller 18 and the pressure roller 110 while the stacking unit 10 is held.
Bring it to 0. Therefore, the paper sheets 4 are carried in along the guide plate 5 supported by the shaft of the drive roller 18 and accumulated on the holding plate 200.

In the conventional sheet stacking apparatus, FIG. 11 is an explanatory view when the drive roller 18 is tilted toward the stacking section 100 to reduce the L ₁ dimension to achieve the size reduction (L ₁ >). L ₂ ). In this case, the following problems occur as described above. That is, the posture of the sheet 4 to be carried in is unstable and faces downward (large Θ, that is, it does not follow the guide plate 5).
However, there is a problem in that the risk of interference with the piled paper sheet 3 increases, that is, the performance during the stacking operation deteriorates, because it is easily carried into the stack. This state can be easily understood with reference to the perspective view of FIG.

[0011]

In the paper sheet stacking apparatus of recent years, miniaturization and cost reduction are becoming the points of competition.
Therefore, there is an increasing need for downsizing of mechanical parts, but in the device according to the conventional technique, the posture of the sheet to be carried in is unstable and the sheet is easily conveyed downward, and the risk of interference with the accumulated sheets is increased, that is, It was difficult to miniaturize it because it causes performance degradation during operation.

It is an object of the present invention to provide a high performance paper sheet stacking apparatus having a simple structure and a small size.

[0013]

In order to achieve the above object, the present invention guides a sheet to be fed from a main conveyance path by a gate to guide it to a conveyance path to a stacking mechanism and a driving roller and a driven roller. In the paper sheet stacking device that stacks a plurality of sheets by the rotation of the roller and the rotation of the impeller roller, the stacking mechanism is a drive roller, a pressure contact roller that is in pressure contact with the drive roller, and is separated from the pressure contact roller coaxially and axially. An impeller having elastic blades provided on the roller and the transport path formed upstream of the pressure contacts of both rollers, and an inner wall surface of the transport path near the pressure contact is defined by a tangent line at the pressure contact. It was constructed by arranging it at a position intersecting with.

Further, according to the present invention, in the stacking mechanism, a sensor for detecting the timing when the paper sheets pass through the pressure contact is arranged, and the pressure contact roller in pressure contact with the drive roller is rotatable by the impeller shaft having elastic blades. And drives the impeller shaft so as to accelerate, decelerate and rotate / stop according to the detection signal of the sensor.

Further, according to the present invention, the fed paper sheet is branched from the main conveyance path by the gate to be guided to the conveyance path to the stacking mechanism, and a plurality of sheets are rotated by the rotation of the driving roller and the driven roller and the rotation of the impeller roller. In a paper sheet stacking device to be housed, a stacking mechanism includes a drive roller, a pressure contact roller that is in pressure contact with the drive roller, and an impeller having elastic blades that are coaxial with the pressure contact roller and are separated from each other in the axial direction. A pressure detecting roller that is formed by the conveying path formed on the upstream side of the pressure contact of the roller, detects the timing when the paper sheet passes through the pressure contact, and the pressure contact roller that is in pressure contact with the drive roller is elastic blade. The blade wheel shaft is rotatably supported, and the blade wheel shaft is driven so as to perform acceleration and deceleration rotation / stop according to the detection signal of the sensor.

[0016]

The paper sheet branched from the main transport path by the gate is guided to the stacking mechanism by the transport path. Next, the paper sheet is bent and deformed by the inner wall surface of the conveying path near the pressure contact, and then is pinched by the pressure contact roller that is in pressure contact with the drive roller and continuously accumulated. At this time, the paper sheets are bent and deformed, so that their postures are restricted, and the stacking operation can be performed stably.

Further, a sensor for detecting the timing at which the paper sheet passes through the pressure contact is arranged, and the pressure contact roller in pressure contact with the drive roller is rotatably supported by the impeller shaft having elastic blades, and the impeller shaft of the sensor. Acceleration according to the detection signal,
By driving so as to perform decelerated rotation / stop, the performance of the integration operation can be further improved. In this case, the paper sheets have a synergistic effect of the bending deformation and the elastic force of the blades,
Since the posture is strongly restrained, the stacking operation can be stably performed.

As described above, according to the present invention, it is possible to eliminate the problems of the prior art, and to provide a high performance paper sheet stacking apparatus having a simple structure and a small size.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the paper sheet stacking apparatus according to the present invention will be described in detail below with reference to FIGS. FIG. 1 is a side view of a paper sheet stacking device showing a first embodiment, and FIG. 2 is a perspective view showing the main part thereof. In FIG. 1, the drive roller 18 is arranged so as to be inclined toward the stacking unit 100 in order to realize the downsizing of the mechanism. Further, a guide roller 151 is arranged at a position where the inner wall 150a of the transport path 150 near the pressure contact P between the drive roller 18 and the pressure contact roller 110 intersects the tangent line 120 at the pressure contact P. Pressure contact P
FIG. 3 is an enlarged view of the vicinity. Tangent line 12 at pressure contact P
Inner wall 15 of the transport path 150 near the pressure contact P that intersects 0
0a is a small shaded portion. The guide roller 151 may be a simple fixed guide.

FIG. 4 is an explanatory view during the integration operation. The fed paper sheet 4 is branched from the main transport path 1 by the gate 2 and is guided to the transport path 150. After that, the sheet 4 is bent and deformed by the inner wall 150a of the transport path 150, and is sandwiched by the drive roller 18 and the pressure contact roller 110 while the posture thereof is constrained, and is conveyed to the stacking unit 100.
At this time, by restraining the posture of the paper sheets 4 along the guide plate 5, the stacking operation can be performed continuously and stably. When the paper sheet 4 is not accumulated in this device and is conveyed to the next device, the gate 2 is switched to the position indicated by the chain double-dashed line.

FIG. 5 is an explanatory view showing the second embodiment.
In FIG. 5, the sensor 130 and the shielding pin 140 are added to the first embodiment. The sensor 130 is arranged to detect the timing when the sheet 4 passes through the pressure contact P, and the shielding pin 140 is arranged to shield the blade 10 of the impeller roller 11. An enlarged view of the vicinity of the pressure contact P is shown in FIG. As shown in FIG. 6, the home position HP of the phase of the impeller-equipped roller 11 is controlled so that one blade has an angle of Θ ₀ . That is, when initialized, the impeller-equipped roller 11 is stopped in the phase shown in FIG. 6 by a sensor signal (not shown). Then, the sheet 4 is put into a waiting state. Part of the blade 10a of the impeller roller 11
Is shielded by the shielding pin 140 and is deformed so as not to hinder the carry-in of the sheet 4. In FIG. 5, the impeller-equipped roller 11 is stopped until the rear end of the sheet 4 passes through the pressure contact P. Therefore, the paper sheet 4 is the inner wall 150a of the transport path 150.
Bending deformation is imparted by the blade 10 and is stationary.
It is carried into the stacking unit 100 against the elastic force of b, and the stacking operation is performed with its posture being strongly restrained along the guide plate 5 as compared with the first embodiment. As a result, the paper sheet 4 is completely carried along the guide plate 5, so that the performance of the stacking operation can be further improved. Note that FIG.
FIG. 6 is an enlarged view showing a main part of the stacking operation of the paper sheets 4.

When the sensor 130 detects the timing when the rear end of the sheet 4 passes through the pressure contact P, the impeller roller 1
1 is accelerated / decelerated to rotate by a predetermined angle (usually 1/2 rotation), stops at the phase of HP in FIG. 6, and again waits for the stacking operation of the subsequent sheets 4. At this time, the trailing edge of the preceding paper sheet 4 is knocked down by the rotating blade 10, and is reliably accumulated and accumulated in the accumulating portion 100. Thereafter, this cycle is repeated to perform the stacking operation of the sheets 4. FIG. 8 is a flowchart of the accumulation operation in this case.

FIG. 9 is an explanatory diagram of the third embodiment. Figure 9
The inner wall 150a of the conveyance path 150 in the vicinity of the pressure contact P, which intersects the tangent line 120 of the pressure contact P, is not formed in the. When the accumulation operation of the flowchart shown in FIG. 8 is performed and it is premised that the roller 11 with impeller is accelerated / decelerated, the posture of the sheet 4 is moved along the guide plate 5 by the elastic force of the stationary blade 10. Since it can be restrained, stable integration operation can be performed even with the configuration of FIG. Therefore, the configuration of FIG. 9 is effective in terms of simplification of the mechanism.

[0024]

The paper sheet stacking apparatus according to the present invention imparts bending deformation to the supplied paper sheets and carries out the stacking operation while restraining the posture thereof along the guide plate 5, so that the performance of the stacking operation is improved. It can be greatly improved.

Accordingly, it is possible to provide a high-performance paper sheet stacking apparatus which eliminates the problems of the prior art and has a simple structure and a small size.

[Brief description of drawings]

FIG. 1 is a side view of a paper sheet stacking device according to the present invention.

FIG. 2 is a perspective view of FIG.

FIG. 3 is an enlarged view of the vicinity of a pressure contact P.

FIG. 4 is an explanatory diagram of an integration operation according to the first embodiment.

FIG. 5 is an explanatory diagram of an integration operation according to the second embodiment.

FIG. 6 is an enlarged view of the vicinity of the pressure contact P of the second embodiment.

FIG. 7 is an enlarged view showing a main part of the integration operation of the second embodiment.

FIG. 8 is a flowchart of an accumulation operation of the second embodiment.

FIG. 9 is an explanatory diagram of the integration operation of the third embodiment.

FIG. 10 is an explanatory diagram of a conventional integrated device.

FIG. 11 is an explanatory diagram of a defect in the conventional technique.

12 is a perspective view of FIG.

[Explanation of symbols]

100 ... Accumulation part, 3 ... Paper sheet, 5 ... Guide plate, 10 ... Blade, 11 ... Roller with impeller, 18 ... Drive roller, 11
0 ... pressure contact roller, 151 ... guide roller (fixed guide).

Claims (1)

[Claims] 1. A paper for feeding a plurality of sheets to be fed from a main conveyance path branched by a gate and guided to a conveyance path to a stacking mechanism, and a plurality of sheets are accommodated by rotation of a driving roller and a driven roller and rotation of an impeller roller. In the leaf stacking apparatus, the stacking mechanism includes the drive roller, a pressure contact roller that is in pressure contact with the drive roller, an impeller having elastic blades that are coaxial with the pressure contact roller and are separated from each other in the axial direction, and both rollers. And the conveying path formed on the upstream side of the pressure contact, and the inner wall surface of the conveying path in the vicinity of the pressure contact is arranged at a position intersecting a tangent line of the pressure contact. Characteristic paper sheet stacking device.