JP4540537B2 - Paper receiving device - Google Patents

Description

  The present invention relates to a paper receiving apparatus, and relates to a technique for receiving paper discharged from a mechanical device such as a printer or a printing machine that performs predetermined processing on the paper.

  Conventionally, as this type of paper receiving apparatus, there is one described in Patent Document 1. This is as shown in FIG. 6, and a pair of side plates 2 are provided on both sides of a bottom plate (paper receiving plate) 1. The surface 3 is formed. On the entrance side of the side plate 2 where the paper 4 is introduced, a paper sliding surface (not shown) that forms an upward slope in the paper discharge direction is formed continuously with the step surface 3.

In this configuration, after the printing paper 4 discharged between the side plates 2 is curved in a U shape by the paper sliding surface, it slides and falls with its own weight while being held in the same shape by the step surface 3. The curved shape is released at the position where the head is removed, and is loaded on the bottom plate 1.
Japanese Utility Model Publication No. 5-26944

  However, in the configuration described above, when there is a small amount of printing paper stacked on the bottom plate 1, the printing paper discharged between the side plates 2 is removed from the step surface 3 until it is stacked on the bottom plate 1. The free fall distance becomes long, the flying form of the free fall printing paper is not stable, and the paper alignment in the paper discharge direction of the print paper loaded on the bottom plate 1 is deteriorated.

  The present invention solves the above-described problems, and the paper discharged onto the paper receiving plate always falls in a stable flying shape without being affected by the amount of paper loaded on the paper receiving plate. It is another object of the present invention to provide a paper receiving apparatus capable of satisfactorily aligning papers stacked on a paper receiving plate.

  In order to solve the above-described problems, a paper receiving apparatus according to the present invention is configured such that a paper receiving plate that stacks and holds sheets discharged from a preceding apparatus and a sheet facing each other in a sheet width direction orthogonal to the sheet discharging direction. Side plate portions disposed on both sides of the backing plate, and both side plate portions move vertically along the base guide and have a base guide having a paper alignment surface facing each other at an interval corresponding to the paper width. The movable guide means has a movable sliding contact surface opposed to each other at an interval narrower than the sheet width at a position above the alignment surface.

  The paper receiving device of the present invention is disposed on both sides of the paper receiving plate facing each other in the paper width direction perpendicular to the paper discharging direction, and a paper receiving plate for stacking and holding the paper discharged from the preceding device. Both side plates are opposed to each other at a space narrower than the paper width at a position above the paper alignment surface of the base guide. It comprises a fixed guide having a fixed sliding contact surface, and movable guide means having a movable sliding contact surface that moves up and down along the base guide from the fixed guide and opposes at a smaller interval than the paper width.

  With the above-described configuration, the paper discharged between the side plate portions from the preceding apparatus is slid on both sides of the paper in the paper width direction with the fixed sliding contact surfaces of the fixed guide while maintaining the curved shape. After falling by its own weight between the contact surfaces and passing through the movable sliding contact surface of the movable guide means, it falls freely with the curved shape open between the paper alignment surfaces of the base guide and is loaded on the paper receiving plate The

  In this paper stacking operation, the smaller the distance between the lower end of the movable sliding contact surface and the uppermost paper surface on the paper receiving plate, the more freely between the paper alignment surfaces of the base guide with the paper open in the curved shape. The falling distance is shortened, and the flying form of the paper discharged onto the paper receiving plate is stabilized.

  For this reason, the distance between the lower end of the movable sliding contact surface and the uppermost sheet surface on the sheet receiving plate is adjusted to a predetermined minimum distance, for example, the minimum distance necessary to release the curved shape of the sheet, and the sheet receiving plate The movable sliding contact surface of the movable guide means is moved upward as the amount of paper stacked on the sheet increases, and the distance between the lower end of the movable sliding contact surface and the uppermost paper surface on the paper receiving plate is a predetermined minimum. By keeping the distance constant, it is possible to satisfactorily align the sheets stacked on the paper receiving plate.

  The movable guide means includes a movable guide having a movable sliding contact surface and a guide position changing means for changing the position of the movable guide in accordance with the amount of sheets stacked on the paper receiving plate.

Further, the movable guide moves up and down over the inside and outside of the fixed guide.
The guide position changing means includes a guide driving means for moving the movable guide up and down along the base guide, and a load amount detecting means for detecting the load amount of the sheets stacked on the paper receiving plate.

Further, both side plate portions are provided so as to be movable along the paper width direction on the paper receiving plate.
In addition, the fixed guides of both side plates are inclined surfaces that gradually narrow from the gap wider than the paper width to the gap narrower than the paper width between the fixed sliding contact surfaces on the end facing the paper in the paper discharge direction. It is what has.

  As described above, according to the present invention, the movable sliding contact surface of the movable guide means is moved upward as the amount of sheets stacked on the paper receiving plate increases, and the lower end of the movable sliding contact surface and the paper By keeping the distance from the uppermost paper surface on the backing plate at a predetermined minimum distance, the paper ejected on the paper backing plate always falls in a stable flying shape, and the paper that is loaded on the paper backing plate Alignment can be performed satisfactorily.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1 to FIG. 3, the paper receiving device includes a paper receiving plate 22 that stacks and holds the paper 21 that is discharged from a preceding mechanical device (not shown) such as a printer, a printing machine, and the paper discharge direction of the paper 21. A side plate portion 23 disposed on both sides of the paper receiving plate 22 opposite to each other in the paper width direction and a stopper 24 for receiving the paper 21 in the paper discharge direction. It is provided on the plate 22 so as to be movable along the paper width direction. The moving mechanism of the side plate portion 23 is a known technique and will not be described here.

  As shown in FIG. 2, the base guides 25 of both side plate portions 23 have a paper alignment surface 25a on the lower side, and both base guides 25 are set to face each other at an interval corresponding to the paper width. Held in position.

  Each side plate portion 23 is provided with a fixed guide 26 on the upper side of the base guide 25, the fixed guide 26 has a fixed sliding contact surface 27, and both fixed guides 26 have a fixed sliding contact surface 27 of the paper of the base guide 25. At a position above the alignment surface 25a, it is held at a set position opposite to each other at an interval narrower than the sheet width.

  The fixed guide 26 has an inclined surface 27a that gradually narrows between the fixed sliding contact surfaces from an interval wider than the paper width to an interval narrower than the paper width on the end side facing the paper 21 in the paper discharge direction. Yes. The movable guide means provided on each side plate portion 23 includes a movable guide 28 and a guide position changing means, and changes the position of the movable guide 28 in accordance with the load amount of the sheets 21 stacked on the paper receiving plate 22.

  The movable guide 28 has a movable slidable contact surface 29, and both movable guides 28 are held at a set position where the movable slidable contact surface 29 is opposed to each other at an interval narrower than the sheet width. The movable guide 28 is provided so as to be able to move up and down along the base guide 25 over a position where the movable guide 28 is housed inside the fixed guide 26 and a position where the movable guide 28 protrudes inside the fixed guide 26. Each of the pair of joint pins 31 of the movable guide 28 is held so as to be movable in the vertical direction.

  The guide position changing means has a guide driving means and a load amount detecting means. The guide driving means moves the movable guide 28 up and down along the base guide 25. A pair of racks 32 are arranged in parallel along the vertical direction on the back side of the base guide 25, and the rack 32 and the joining pin 31 are connected. The connecting members 33 are connected. A pair of pinion gears 34 meshed with each rack 32 is connected by a shaft 35b rotatably held by a bearing 35a provided on the base guide 25, and a gear 37 provided on the motor 36 meshed with one pinion gear 34. Yes.

  The load amount detecting means detects the load amount of the paper 21 loaded on the paper receiving plate 22, and in this embodiment, as shown in FIG. 3, the optical sensors provided in both base guides 25. 38.

  The guide position changing unit detects that the sheet 21 has reached a predetermined stacking amount by blocking the optical axis of the optical sensor 38 of the stacking amount detecting unit by the sheet layer of the sheet 21 stacked on the sheet receiving plate 22. Then, the motor 36 of the guide driving means is driven to move the movable guide 28 to a predetermined upper position set in advance by the meshing of the gear 37 and the pinion gear 34.

  Hereinafter, the operation of the above-described configuration will be described. The sheet 21 discharged from the preceding apparatus between the side plate portions 23 is guided by the inclined surface 27a of the fixed guide 26 and enters the fixed sliding contact surface 27 of the fixed guide 26 while curving. Collide with 24.

When the inclined surface 27a is not provided, the sheet 21 is discharged in a curved state between the side plate portions 23 from the preceding apparatus.
Thereafter, as shown in FIG. 3, the sheet 21 is slidably brought into contact with the fixed sliding contact surfaces 27 of the fixed guide 26 at both side edges in the sheet width direction while maintaining a curved shape. Similarly, it falls between the movable sliding contact surfaces 29 of the movable guide 28 by its own weight.

  Then, the paper 21 falling between the lower end of the movable sliding contact surface 29 of the movable guide 28 and the paper aligning surface 25a of the base guide 25 falls freely on the paper receiving plate 22 with the curved shape opened. It is loaded sequentially.

  In this sheet stacking operation, as shown in FIG. 3, the smaller the distance between the lower end 29a of the movable sliding contact surface 29 and the uppermost sheet surface 21a of the sheet layer stacked on the sheet receiving plate 22, the smaller the sheet. In the state in which the curved shape of 21 is released, the free fall distance between the paper alignment surfaces 25a of the base guide 25 is shortened, and the flying shape of the paper 21 discharged onto the paper receiving plate 22 is stabilized.

  For this reason, the distance between the lower end 29a of the movable sliding contact surface 29 and the uppermost sheet surface 21a of the sheet layer stacked on the sheet receiving plate 22 is required to release a predetermined minimum distance, for example, the curved shape of the sheet 21. Adjust to the smallest possible distance.

  Then, as shown in FIG. 3B, the sheet layer of the sheet 21 stacked on the sheet receiving plate 22 blocks the optical axis of the optical sensor 38, so that the sheet 21 has reached a predetermined stacking amount. When detected, the motor 36 of the guide driving means is driven to move the movable guide 28 to a predetermined upper position set in advance by the engagement of the gear 37 and the pinion gear 34. At this time, since the movable guide 28 is housed in the fixed guide 26 and does not protrude upward from the base guide 25, the apparatus can be made compact.

  As described above, the movable sliding contact surface 29 of the movable guide 28 is moved upward as the stacking amount of the paper 21 stacked on the paper receiving plate 22 increases, and the lower end 29a of the movable sliding contact surface 29 and the paper receiver. By keeping the distance from the uppermost sheet surface 21a of the sheet layer stacked on the plate 22 at a predetermined minimum distance, the sheets 21 stacked on the sheet receiving plate 22 can be well aligned. .

  In the present embodiment, the base guide 25 is provided with the fixed guide 26 and the movable guide 28 as the movable guide means. However, as shown in FIG.

  In the present embodiment, an example in which the load amount is detected by one set of optical sensors 38 is disclosed. However, in order to detect the load amount in multiple stages, the positions of the plural sets of optical sensors 38 are changed in the vertical direction. In this case, the movable guide 28 is stepped to each predetermined position set in advance in multiple steps each time the amount of the sheets 21 is detected stepwise by the optical sensor 38 at each position. Move.

  Further, as shown in FIG. 5, the optical sensor 38 can be provided on the movable guide 28. In this case, each time the loaded paper 21 blocks the optical axis of the optical sensor 38, the optical sensor 38 and the movable guide 28 are kept at a constant distance L1 between the optical sensor 38 and the lower end of the movable guide 28. It moves stepwise to each predetermined position set in advance.

  Further, the number of sheets 21 passing through the optical axis of the optical sensor 38 is integrated, and the movable guide 28 and the optical sensor 38 are moved by a predetermined distance whenever the number of stacked sheets reaches a predetermined number of sheets. It is also possible.

  It is also possible to provide a distance measuring sensor on the movable guide 28. In this case, the distance from the uppermost sheet surface of the paper layer loaded on the paper receiving plate 22 to the distance measuring sensor is detected, and the movable guide 28 and the optical sensor are used as needed so that this distance is maintained at a predetermined distance. It is also possible to move 38.

The perspective view which shows the paper receiving apparatus in embodiment of this invention The side plate part of the paper receiving device is shown, (a) plane sectional view, (b) rear view, (c) longitudinal sectional view. (A) is a figure which shows the state which the movable guide in a paper receiving apparatus protrudes below, (b) is a figure which shows the state which the movable guide in a paper receiving apparatus retracted upwards Schematic diagram showing a paper receiving device according to another embodiment of the present invention. Schematic diagram showing a paper receiving device in still another embodiment of the present invention. Sectional view showing a conventional paper receiving device

Explanation of symbols

21 paper 21a paper surface 22 paper receiving plate 23 side plate portion 24 stopper 25 base guide 25a paper alignment surface 26 fixed guide 27 fixed sliding contact surface 27a inclined surface 28 movable guide 29 movable sliding contact surface 29a lower end of movable sliding contact surface 30 long hole 31 Joining Pin 32 Rack 33 Connecting Member 34 Pinion Gear 35a Bearing 35b Shaft 36 Motor 37 Gear 38 Optical Sensor

Claims (7)

A paper receiving plate for stacking and holding sheets discharged from the preceding apparatus, and side plate portions disposed on both sides of the paper receiving plate so as to face each other in the paper width direction orthogonal to the paper discharging direction. The section has a base guide having a paper alignment surface opposed to the paper width corresponding to the paper width, and is movable up and down along the base guide and opposed to a space narrower than the paper width at a position above the paper alignment surface of the base guide. A paper receiving device comprising movable guide means having a sliding surface. A paper receiving plate for stacking and holding sheets discharged from the preceding apparatus, and side plate portions disposed on both sides of the paper receiving plate so as to face each other in the paper width direction orthogonal to the paper discharging direction. The portion has a base guide having a paper aligning surface opposed to the interval corresponding to the paper width, and a fixed guide having a fixed sliding contact surface opposed to the interval narrower than the paper width at a position above the paper aligning surface of the base guide, A paper receiving apparatus comprising movable guide means having movable sliding contact surfaces that move up and down along a base guide from a fixed guide and face each other at an interval narrower than the paper width. 2. The movable guide means comprises a movable guide having a movable sliding contact surface, and a guide position changing means for changing the position of the movable guide in accordance with the amount of sheets stacked on the paper receiving plate. Or the paper receiving apparatus of 2. The paper receiving apparatus according to claim 2, wherein the movable guide moves up and down over the inside and outside of the fixed guide. 4. The guide position changing means includes guide driving means for moving the movable guide up and down along the base guide, and load amount detection means for detecting the load amount of the paper stacked on the paper receiving plate. The paper receiving device described in 1. 3. The paper receiving apparatus according to claim 1, wherein both side plate portions are provided so as to be movable along the paper width direction on the paper receiving plate. The fixed guides of both side plates have inclined surfaces that gradually narrow the distance between the fixed sliding contact surfaces from a width wider than the paper width to a width narrower than the paper width on the end side facing the paper in the paper discharge direction. The paper receiving apparatus according to claim 1, wherein the paper receiving apparatus is a paper receiving apparatus.

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