JPH04109955U - stacker device - Google Patents

Abstract

(57) [Summary] [Purpose] To stably stack paper ejected from the ejection roller onto the stacker base. [Structure] In the stacker device 10, a paper guide 30 is provided at a position above the stacker base 13 and close to the exit side of the discharge roller 11.
A virtual discharge line 31 through which the paper 12 discharged from the discharge roller 11 passes when the paper guide 30 is not provided.
The stacker base has an inclined part 32 that extends in an inclined manner from a higher level position to a lower level position than the virtual ejection line 31, and the paper 12 whose tail end has passed through the ejection roller 11 is attached to the stacker base. Reference numeral 13 is set to rise and fall to support the leading end of the paper 12, and is set at the lowest point 3 of the inclined part of the paper guide 30.
2A is configured to push and deform the intermediate portion of the paper 12.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a paper stacker device.

0002

[Conventional technology]

Conventionally, as a paper stacker device, there is one described in Japanese Utility Model Publication No. 1-42198. This stacker device is located above the stacker base and close to the output side of the discharge roller. , a guide having an inclined part and a parallel part is provided, and the paper is ejected from the ejection roller. is guided by the inclined portion and the parallel portion, and as a result, the paper is It is intended to be stacked horizontally on a surface.

0003

[Problem that the idea aims to solve]

However, in the conventional technology, the previous and subsequent sheets are continuously transferred from the ejection roller to the stacker. When the paper is ejected onto the paper, the leading edge of the trailing paper collides with the trailing edge of the leading paper, causing the paper to jam. There is a problem in that it causes problems.

0004 According to the inventor's study, this jam occurs due to the following reasons ( (See Figure 10). In FIG. 10, 1 is a discharge roller, 2 is a stacker base, and 3 is a discharge roller. is a stopper, and 4 is a guide.

[0005] (A) The trailing edge of the paper comes out of the ejection roller and the leading edge collides with the stopper 3. (See Figure 10(A)).

[0006] (B) The shock wave caused by the collision in (A) above propagates from the leading edge of the paper toward the trailing edge. (See FIG. 10(B)).

[0007] (C) The trailing edge of the paper flutters due to the shock wave, which causes the ejection line of the following paper to (See Figure 10(C)).

[0008] (D) The leading edge of the subsequent paper that is ejected from the ejection roller is flapping as shown in (C) above. The paper collides with the tail end of the preceding paper, causing a jam (see FIG. 10(D)).

[0009] This invention stably stacks paper ejected from the ejection roller onto the stacker base. The purpose is to

0010

[Means to solve the problem]

This invention allows paper to be ejected from the paper feeder's ejection roller on a stand that can be raised and lowered. In a stacker device that sequentially stacks items on a stacker base, the stacker is discharged above the stacker base. A paper guide is provided near the exit side of the roller. The paper guide is used when the paper ejected from the ejection roller does not have a paper guide. from a higher level position than the virtual discharge line that passes through to a lower level position than the virtual discharge line. It has an inclined part extending in an inclined manner across the bell position, For paper whose tail end has passed through the ejection roller, the stacker base will remove the leading edge of the paper. The lowest point of the inclined part of the paper guide is set to raise and lower to support the paper. The setting is such that the deformation is caused to occur.

[0011]

[Effect]

According to the present invention, it is possible to set the vertical position of the stacker base and to adjust the slope of the paper guide to its maximum position. By setting the bottom point, when the trailing edge of the paper passes through the ejection roller, the leading edge of the paper on the stacker base, and place the middle part of the paper at the lowest point of the inclined part of the paper guide. By pressing and deforming the paper, the leading edge of the following paper is ejected from the ejection roller. Jams that collide with the trailing edge of the preceding paper can be prevented by following (a) to (d). .

0012 (a) Free part of the paper from the tail end to the middle part after passing through the ejection roller (where there is no contact with other parts) The length L1 (non-contact part) is compared to the length L2 when there is no paper guide, etc. As a result, the amplitude of the fluttering becomes smaller (see FIG. 6).

[0013] (b) The middle part of the paper that has passed through the ejection roller is pushed into the lowest point of the inclined part of the paper guide. The shock waves are brought into contact with each other to block transmission of shock waves to the tail end side.

[0014] (c) Make sure that the tail end discharge line of the preceding paper (12A) is at the lowest point on the inclined part of the paper guide. Due to the pushing action of This reduces the effect of fluttering at the trailing edge of the preceding paper on the leading edge of the following paper. Yes (see Figure 7).

[0015] (d) The tail end of the preceding paper is pushed by the lowest point of the inclined part of the paper guide, The falling speed onto the stacker base is increased, and the flapping of the trailing edge of the preceding paper is reduced by the following paper. The effect on the leading edge of the paper can be reduced.

[0016]

【Example】

Figure 1 is a schematic diagram showing one embodiment of the stacker device, and Figure 2 is a schematic diagram showing the stacker base. 3 is a side view showing the tilting structure of the sub-base part, FIG. 4 is a front view of FIG. 3, and FIG. 5 is a side view showing the tilting structure of the sub base part. A block diagram showing the control system of the stacker device, Figure 6 shows the length of the free section of the paper. Figure 7 is a schematic diagram showing the ejection line for the preceding paper and following paper, and Figure 8 is a schematic diagram showing the paper guide line. FIG. 9 is a schematic diagram showing an example of the stacker device, and FIG. 9 is a schematic diagram showing a modification example of the stacker device.

[0017] As shown in FIG. 1, the stacker device 10 includes a pair of upper and lower discharge rollers of a paper feeding device. The sheets 12 discharged from the roller 11 are stacked one after another on a stacker base 13 that can be raised and lowered. I will post it. 14 is an elevator that raises and lowers the stacker base 13, and 15 is a stopper. Ru.

[0018] Here, the stacker device 10, as shown in FIG. Level detectors 16A to 16A detect the upper surface level of the paper 12 located at the top layer. Equipped with 16E. The level detector 16C detects the upper surface level at the center of the paper, Level detectors 16A, 16B, 16D, and 16E detect the upper surface level of the paper periphery. do. Incidentally, the level detectors 16A to 16E are, for example, transmissive or reflective beams. Can be configured with a sensor.

[0019] The stacker base 13 also includes a main base that supports the central portion of the paper, as shown in FIG. The main base portion 17 supports the peripheral portion of the paper and is tilted with respect to each of the four sides of the main base portion 17. It is divided into four sub-base parts 18 (front, rear, left and right) that can be moved.

[0020] At this time, the tilting structure of each sub-base part 18 is as shown in FIGS. 3 and 4, and the main base A tilting shaft 20 that is swingably supported by a bracket 19 fixed to the section 17 has an auxiliary base. One end of the base portion 18 is fixed, and the tilting shaft 20 is rotatable by a tilting motor 21. There is. 22 and 23 are sprocket wheels, and 24 is a chain.

[0021] Further, as shown in FIG. 5, the control unit 25 also controls the detection results of the level detectors 16A to 16E. The elevator 14 and tilting motor 21 are controlled based on this. That is, the control section 25 The level detector 16C corresponding to the center of the paper detects the level of the top surface of the paper 12. Then, the elevator 14 is driven and the stacker base 13 is lowered by a predetermined amount. and , the control unit 25 includes level detectors 16A, 16B, 16D, corresponding to the peripheral portion of the paper, 16E corresponds to each sub-base part 18 until it no longer detects the upper surface level of the paper 12. By driving the tilting motor 21, each sub base part 18 is tilted to the downward side, and the The upper surface level of the paper 12 on the locker base 13 is made substantially horizontal.

[0022] In addition, the stacker device 10 has an ejector located above the stacker base 13, as shown in FIG. A paper guide 30 is provided at a position close to the output side of the output roller 11. paper guy The door 30 has a rod shape or a plate shape as shown in FIG.

[0023] Note that the rod-shaped paper guide 30 has less contact with the paper 12 than a plate-shaped one. The area is reduced and static electricity generation can be reduced.

[0024] At this time, the paper guide 30 allows the paper 12 ejected from the ejection roller 11 to Higher level than the virtual discharge line 31 that would pass if the paper guide 30 is not provided A slope extending from the virtual discharge line 31 to a lower level position than the virtual discharge line 31. It has an oblique portion 32.

[0025] In the stacker device 10, the tail end is removed from the discharge roller 11. The stacker base 13 is raised to support the leading edge of the paper 12. The lowest point 32A of the inclined part of the paper guide 30 is set at the middle part of the paper 12, especially at the tail. It is set so that the vicinity of the end is pushed downward and deformed.

[0026] Note that the control unit 25 is based on the detection results of the level detectors 16A to 16E described above. The upper surface of the paper 12 on the stacker base 13 is controlled by the elevator 14. and the lowest point 32A of the inclined part of the paper guide 30. Set the range so that the paper 12 can pass smoothly and be ejected from the ejection roller 11. The leading edge of the loaded paper 12 is placed on the upper surface of the stacked paper 12 on the stacker base 13. The level difference F between the falling point and the lowest point 32A of the inclined part of the paper guide 30 is used. The lowest point 32A of the inclined part of the paper guide 30 is located at the middle part of the paper 12, especially near the tail end. It shall be set within a range that can achieve the above-mentioned pushing action.

[0027] At this time, in the embodiment of FIG. 1, the stacker base 13 is connected to the main base part 17 and the sub base The upper surface level of the paper 12 on the stacker base 13 is kept approximately horizontal. Since it is set, the above-mentioned E value and F value are the same value.

[0028] Next, the operation of the above embodiment will be explained.

[0029] In the process of sequentially stacking the paper 12 onto the stacker base 13, (a) both left and right sides of the paper The burr of the marginal punch for feeding on the edge, (b) the perforation for paper storage. Accumulation of bending deformation at both front and rear ends of the paper when folded to create a crease As a result, the stacking thickness at the paper periphery is smaller than the stacking thickness at the center of the paper. When the top surface of the paper is about to curve into a concave shape, the level detector 16A to 16E detect this change in the paper top surface level, and the sub base part 18 detects this level change. The paper is tilted according to the detection results of the paper detector, and as a result, the top surface of the paper is always level. Keep it approximately horizontal. Therefore, the paper is newly discharged from the discharge roller 11 to the stacker bay. Subsequent sheets that fall onto the upper surface of the preceding stacked sheets on the stacker base 13 are always The paper always falls and is stacked stably on the almost horizontal top surface of the preceding stacked paper, causing a jam. Never.

[0030] Setting the vertical position of the stacker base 13 and the lowest point 3 of the inclined part of the paper guide 30 By setting 2A, when the tail end of the paper 12 passes through the ejection roller 11, the paper 12 is supported by the stacker base 13, and the middle part of the paper 12, especially the tail part, is supported by the stacker base 13. By pushing and deforming the vicinity of the end at the lowest point 32A of the inclined part of the paper guide 30. As a result, the leading edge of the succeeding sheet discharged from the discharge roller 11 collides with the tail end of the preceding sheet. The occurrence of jams can be prevented by following (a) to (d).

[0031] (a) Free part of the paper 12 from the tail end to the middle part after passing through the ejection roller 11 (other For example, when the paper guide 30 etc. is not present, the length L1 (non-contact part with the member) is It becomes shorter than the length L2, and the amplitude of the fluttering becomes smaller (see FIG. 6).

[0032] (b) The middle part of the paper 12 that has passed through the ejection roller 11 is located at the inclined part of the paper guide 30. It is forced into contact with the lowest point 32A and blocks the propagation of shock waves to the tail end side. It will be done.

[0033] (c) The tail end discharge line of the preceding paper (12A) is at the bottom of the inclined part of the paper guide 30. Due to the pushing action of point 32A, the leading edge of the succeeding paper (12B) is below the discharge line. The trailing edge of the leading paper is forced to move in the opposite direction, and the fluttering of the trailing edge of the leading paper affects the leading edge of the trailing paper. The impact can be reduced (see Figure 7).

[0034] (d) The tail end of the preceding paper is pushed by the lowest point 32A of the inclined part of the paper guide 30. This speeds up the falling speed of the paper onto the stacker base 13 and prevents the fluttering of the trailing edge of the preceding paper. The influence of unevenness on the leading edge of subsequent paper can be reduced.

[0035] Note that in implementing the present invention, the stacker base 13 is not necessarily the main base portion 17. on the stacker base 13. The upper surface level of the paper 12 may be curved as shown in FIG. Koto The controller 25 controls the elevator control based on the detection results of the level detectors 16A to 16E. The above-mentioned E value and F value to be set by the control in step 14 become different values.

[0036]

[Effect of the idea]

As described above, according to the present invention, the paper ejected from the ejection roller can be stably stacked. can be loaded on the carrier base.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of a stacker device.

FIG. 2 is a plan view showing the stacker base.

FIG. 3 is a side view showing the tilting structure of the sub-base part.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a block diagram showing a control system of the stacker device.

FIG. 6 is a schematic diagram showing the length of the free portion of the paper.

FIG. 7 is a schematic diagram showing discharge lines for preceding sheets and following sheets.

FIG. 8 is a schematic diagram showing an example of a paper guide.

FIG. 9 is a schematic diagram showing a modification of the stacker device.

FIG. 10 is a schematic diagram showing a conventional device.

[Explanation of symbols]

10 Stacker device 11 Discharge roller 12 Paper 13 Stacker base 30 Paper guide 31 Virtual discharge line 32 Slope part 32A Lowermost point of slope

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Yutaka Yone 1-1-1 Ichigaya Kagacho, Shinjuku-ku, Tokyo Within Dai Nippon Printing Co., Ltd.

Claims (1)

[Scope of utility model registration request] Claim 1: In a stacker device that sequentially stacks sheets discharged from a discharge roller of a paper feeding device onto a stacker base that can be raised and lowered, a paper guide is provided at a position above the stacker base and close to the exit side of the discharge roller. The paper guide has an inclined shape extending from a position higher than the virtual ejection line through which the paper ejected from the ejection roller would pass if the paper guide was not provided, to a position lower than the virtual ejection line. The stacker base is set to move up and down to support the leading edge of the paper, and the lowest point of the inclined part of the paper guide is , a stacker device configured to push and deform an intermediate portion of paper.