JPH0714291Y2 - Paper ejection device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper discharge device that discharges paper such as copy originals and transfer paper onto a paper discharge tray by a conveying force of a paper discharge roller.

2. Description of the Related Art Conventionally, for example, some document reading apparatuses are capable of reading a document by conveying a document long in the feeding direction (for example, a long document exceeding AO) or a thick document such as a book. Then, in the case of sending this long original, when the original is conveyed with the image surface to be copied facing downward, the original is a moving section, for example, a reading optical system (in the case of a copying machine, it may be an exposing section. Then, after the image is read there, it is ejected onto a paper ejection tray by a paper ejection roller of a paper ejection device provided near the paper ejection port.

However, particularly in the case of a document reading apparatus having a structure in which a document is inserted from the front side and the document is ejected from the rear side of the apparatus onto the paper ejection tray, when such a long document is used, as shown in FIG. As shown in FIG. 5, it is troublesome to turn the document P _L to the rear of the document reading device and receive it every time the document P _L is ejected onto the 3-tray ejection by the ejection roller 2, so leave it as it is. Then, the original P _L runs off the paper ejection tray 3 and falls onto the floor, which may be damaged or soiled.

Similarly, in the case of discharging a facsimile document or a discharging device for discharging a document or a transfer sheet of a copying machine, a print sheet of a printer, or the like, when the length of the sheet is long, the discharge tray has a problem. There were cases.

Purpose This invention was made in view of the above problems,
Even if the copy original or transfer paper is a non-standard paper that is thin and long in the feed direction, the paper can be smoothly discharged, and the paper may be damaged or soiled during discharge. An object of the present invention is to provide a paper discharge device that does not occur.

Another object is to select the type of paper to be used so that the discharge device automatically becomes the optimum state suitable for the selected paper in accordance with the selection content.

In order to achieve the above object, the present invention provides an ejecting device for ejecting a copy original, a transfer sheet, or the like onto a paper ejection tray by the conveyance force of the paper ejection roller, which is close to the paper ejection side of the ejection roller. Then, a paper guide member having a linear guide surface and a curved curved guide surface for guiding the paper in the process of being conveyed by the paper ejection roller is provided, and the linear guide surface is a paper ejection tray. Position that is substantially parallel to the upper surface of the sheet, and a second position that guides the curved guide surface so as to face the discharge roller and reverse the moving direction of the sheet conveyed by the discharge roller. It is provided so that it can be displaced.

Further, in the paper ejection device, the paper selection means for selecting the type of paper to be used and the paper guide member are the first
Paper guide member driving means for driving the paper guide member driving means so as to be displaced to the second position and the second position, and the paper guide member driving means is controlled in accordance with the kind of paper selected by the paper selecting means. The member in the first position or the second position
It is more effective to provide a control means for displacing to the position.

Hereinafter, a specific description will be given based on an embodiment of the present invention.

FIG. 1 is a perspective view showing an example in which the paper discharge device according to the present invention is applied to a document discharge part of a document reading device, and FIG. 2 is a diagonally upper rear part of the whole document reading device equipped with the paper discharge device. FIG.

As shown in FIG. 1, this paper ejecting device uses the conveying force of the paper ejecting roller 2 which rotates in the directions A ₁ and A ₂ as shown by the arrows in FIG.
Is discharged onto a discharge tray 7, and is attached to a discharge section at the upper rear surface of the document reading apparatus as shown in FIG.

The document reading device has a plurality of paper selection buttons (details will be described later) which are selectively pressed according to the type of document (paper) used on the upper part of the main body 10 and indicates, for example, a document size and a reduction ratio. The operation panel 5 is provided with various instruction buttons, display lamps, etc., and a document table 17 used when inserting a document into the main body 10 is provided on the front surface (right side in the drawing).

Then, as shown in FIG. 1, this paper ejection device is in the process of being conveyed in the direction of arrow B by the conveyance force of the paper ejection roller 2 in the vicinity of the paper ejection side of the paper ejection roller 2. Paper guide member 8 having a plurality of guide surfaces 8a, 8b for guiding the document P
Is provided so that either of the guide surfaces 8a and 8b can be selected and used depending on the type of paper used.

The paper ejection tray 7 is formed with a plate width capable of loading the largest size document that can be fed, and a plurality of documents up to a predetermined length, for example, AO size, are arranged at an upper portion at intervals in the feeding direction. It is placed on the formed rib-shaped sheet placement surface 7a.

Further, in the paper ejection tray 7, an original document once placed on the paper placing surface 7a is indicated by an arrow B due to friction between the original document and the subsequently ejected original document.
An inclined portion 7b is formed on the front side so as not to be fed in the direction.

The discharge tray 7 is fixed and supported at the bottom by a stay member 9 provided orthogonal to the discharge direction,
The main body 10 is provided with a plurality of mounting claws 7c formed at the end on the side of the paper ejection roller 2.
It engages with the groove formed in (Fig. 2).

Then, both ends of the stay member 9 are fixed to one ends of the angle members 11 and 12 formed of plate-shaped members, respectively, and the other ends 11a, 11b and 12a, 12b of the angle members 11 and 12 are fixed.
(Not shown, but at positions symmetrical to 11a and 11b) are fixed to the main body 10 by screwing or the like.

A plurality of paper guide members 8 (three in this example) are provided, and a shaft 13 is penetrated in the vicinity of one end of each of the paper guide members 8 and fixed integrally with the shaft 13, and the shape of the other paper discharge roller 2 side is formed. It is made thin and has a linear guide surface 8a on the upper surface and a curved curved guide surface 8b (see also FIG. 6) on the lower surface.

Then, the sheet guide members 8 are formed in openings 7d corresponding to the sheet guide members 8 near the ribs on the sheet placement surface 7a on the upper surface of the sheet discharge tray 7, respectively.
Of the guide surface 8a and the curved guide surface 8b.
Most of the projections always protrude above the upper surface.

The shaft 13 is rotatably supported in the arrow C direction by two support members 14 (only one is shown for simplification), one end of which is fixed to the stay member 9. The lateral movement prevention C ring or the like restricts the movement in the axial direction indicated by the arrow D in FIG. 1 so that only the rotation is permitted. A rotating mechanism 20 for rotating the paper guide member 8 in the arrow C direction is provided at one end thereof.

Reference numeral 1 in FIG. 1 denotes a contact glass provided as a transparent document guiding means. A predetermined position on the lower surface of the contact glass illuminates a document on the contact glass 1 with a lamp (not shown), and the reflected light is shown. A reading optical system 4 for forming an image on a light receiving section for reading the image data of an original is provided, and a back-up roller 19 is provided on the upper portion.

The rotating mechanism 20 guides the engaging portion 21 for positioning and fixing the paper guide member 8 and the engaging portion 21 movably in the axial direction of the shaft 13 (arrow D) as shown in FIG. , A biasing guide portion 22 that always applies a biasing force in the engagement direction indicated by arrow D ₁ , and a pin 16 is integrally fitted into a holding portion 15a formed on the handle 15 and the pin 16 is removed. A predetermined amount is projected from the end surface 15b of the hand 15 on the stay member 9 side.

On the other hand, the urging guide portion 22 has a small-diameter portion 23a shown in FIG. 5 formed in the pipe portion 23 of the handle 15 in which an inner pipe 24 having good slidability is inserted up to a step with the large-diameter portion 23b. One end of the shaft 13 is fitted into the inner tube 24 so as to be movable in the arrow D direction.

Further, a spring receiver 29 having a collar portion 29a is screwed to the left end surface of the shaft 13, and a spring 31 is engaged between the collar portion 29a and the left end surface of the shaft 13 so as to be taken together with the pipe portion 23. Hand 15 (4th
The whole figure is always biased to the right in FIG.

Further, at the end portion on the right side of the pipe portion 23 (on the side of the discharge tray 7), U
A character-shaped notch 23c (see also FIG. 4) is formed, an elongated hole 24a is formed at a position corresponding to the notch 23c of the inner pipe 24, and movement restriction is performed in the notch 23c and the elongated hole 24a. Insert pin 27 and shaft
Even if the pipe portion 23 is screwed to the left side in FIG. 5 and is moved leftward in FIG. 5, the amount of movement is restricted by the long hole 24a and the pin 27 so that it does not fall off the shaft 13.

Further, as shown in FIG. 4, a positioning plate 28 formed in an arc shape corresponding to the rotation position of the pin 16 about the shaft 13 is provided.
Fixed to the left end surface 11c of the angle member 11 with screws or the like,
Positioning holes 28a, 28b and 28c for determining the fixing position of the paper guide member 8 are formed in the positioning plate 28 at positions corresponding to the pins 16.

As shown in FIG. 3, the operation panel 5 has a plurality of paper selection buttons that are selected and pressed according to the type of original such as plain paper, books (books), and long sheets, that is, plain paper button 6a and book button. 6b and a long button 6c are provided respectively, and display lamps LED ₁ , LED ₂ and LED ₃ are provided corresponding to the respective buttons.

Next, the operation of this embodiment configured as described above will be described.

First, the case where a standard plain paper document is used will be described.

In the case of a plain paper original, the plain paper button 6a of the operation panel 5 shown in FIG. 3 is pressed to automatically adjust the distance between the rollers of the paper discharge roller 2 in accordance with the thickness of the original.

At this time, when the pin 16 of the rotating mechanism 20 shown in FIG. 4 is in the position fitted into the positioning hole 28a as shown in the figure, the paper guide member 8 fixed to the shaft 13 is shown in FIG. As shown, the tip of the lower curved guide surface 8b is in contact with the inclined portion 7b of the paper discharge tray 7, and the upper guide surface 8a is the inclined portion.
The first position is inclined substantially parallel to 7b.

Therefore, as shown in FIG. 6, the document P ejected in the direction of the arrow F by the paper ejection roller 2 hangs down by its own weight as it passes through the paper ejection roller 2, and then falls on its inclined guide surface 8a. The sheets are guided while being in contact with each other and discharged onto the sheet discharge tray 7.

Also, when using this plain paper original, the rotation mechanism 20
When the pin 16 of FIG. 4 is fitted in a portion other than the positioning hole 28a (28b or 28c), the spring 31 having the handle 15 shown in FIG.
If you move in the opposite direction of arrow D ₁ against the urging force of
Since the pipe portion 23 and the inner pipe 24 shown in FIG. 5 integrally move to the left, the pin 16 shown in FIG. 4 comes out of the positioning hole 28b or 28c, and the handle 15 is opposite to the arrow E. Since the pin 16 is rotatable in the direction, the pin 16 is fitted into the positioning hole 28a by the biasing force of the spring 31 when the handle 15 is rotated to the position shown in the figure and the grip 15 is released.

Even if the tube portion 23 is moved too much when it is moved to the left, since the right end of the long hole 24a comes into contact with the movement regulating pin 27 of the tube portion 23, the amount of movement is regulated. It does not fall off the shaft 13.

Next, when sending a thick and heavy original other than a standard article such as a book, press the book button 6b (FIG. 3) of the operation panel 5 to set the distance between the rollers of the discharge roller 2 to the original. Automatically adjusts according to the thickness of the original, and sets the original (in the case of a book, usually put in the book carrier) on the original table 17.

Then, the pin 16 of the rotating mechanism 20 shown in FIG.
When fitted into 28b, the angle θ of the guide surface 8a of the paper guide member 8 with respect to the paper placing surface 7a of the paper discharge tray 7 becomes an angle at which the guide surface 8a becomes substantially horizontal as shown in FIG. The height of the guide surface 8a is the roller 2a below the discharge roller 2.
The position is approximately equal to or slightly lower than the horizontal tangent line of the upper end of.

In this state, as shown in FIG. 7, when the thick original Pb is ejected by the rotation of the ejection roller 2 in the direction of the arrow, the original
Even if the center of gravity (including the buck carrier) of Pb moves to the side of the paper discharge tray 7 with respect to the paper discharge roller 2, the lower surface thereof becomes the horizontal tangent line of the upper end of the roller 2a below the paper discharge roller 2 described above. Since it is reliably guided by the guide surface 8a which is fixed in a substantially horizontal state at a position substantially equal to or slightly lower than that, the rear side of the document Pb is lifted up as shown by the phantom line in FIG. By deforming the back-up roller 19 (the outer peripheral portion of which is made of an elastic material and easily deformed) shown in FIG. 1, the problem that the document is separated from the contact glass 1 and out of focus is eliminated.

Similarly, for example, when using the document P _L long beyond the AO size is excisional the original on the original table 17 after pressing a long button 6c of the operation panel 5 (Figure 3).

Then, the pin 16 of the rotating mechanism 20 shown in FIG.
When fitted into 28c, the curved guide surface 8 of the paper guide member 8
As shown in FIG. 8, b is in the second position facing the paper ejection roller 2, and the guide direction is the original table 17 (FIG. 2).
Turn to the side and face diagonally upward.

In this state, when the document P _L long as shown in FIG. 8 is by connexion discharged to the paper discharge rollers 2, the document P _L is curved guide surface
Even if the operator stands on the side of the document table 17 shown in FIG. 2 which is normally located, the document is reversed and returned when it is reached at that position. Since P _L can be sequentially wound, even if a long document that cannot be placed on the discharge tray 7 is moved to the rear of the discharge tray 7 each time, the trouble of receiving the document can be saved.
Work efficiency is improved.

Further, there is no damage or stain caused by dropping the document discharged onto the discharge tray 7 when the document is left as it is.

FIG. 9 shows a portion corresponding to FIG. 4 of another embodiment in which any one of a plurality of guide surfaces of a paper guide member is automatically selected according to the type of paper to be used and is set to a use position. FIG. 10 is a block diagram of the control unit.

This paper discharge device is the same as the above embodiment and its rotation mechanism 40 (fourth
The external shape of the entire apparatus is substantially the same as that of the above-described embodiment (see FIG. 2).

A plurality of paper selection buttons 6a to 6c on the operation panel 5 of FIG. 10 which is a paper selection means for selecting the type of paper to be used and a plurality of shafts 13 are fixed on the shaft 13 as in FIG. Paper guide member driving means for displacing the provided paper guide member 8 to the above-described first position and second position and selectively driving one of the plurality of guide surfaces 8a or 8b to the use position. The rotation mechanism 40 of FIG. 9 and the control means for controlling the rotation mechanism 40 in accordance with the type of paper selected by the paper selection buttons 6a to 6c of the operation panel 5 of FIG. Control circuit 50
And a motor drive circuit 51.

The rotation mechanism 40 has a worm wheel 41 fixed to the left end portion of the shaft 13, and the worm wheel 41 is fixed to the left end surface of the angle member 11 so that the worm wheel 41 fixed to the rotation shaft of the motor 42 meshes with the worm wheel 41. It is fixed to 11c via a bracket 44.

Further, a narrow plate-shaped light shielding plate 45 is fixed to the center of the left end surface 13a of the shaft 13 by, for example, screwing, and the light shielding plate 45 is fixed.
On the rotation locus of the light shielding portion 45a at the tip of, for example, sensors 46A, 46B and 46C, which are light transmission type photosensors, are arranged via a sensor holding bracket 47, and the sensor holding bracket 47 is placed on the left end surface 11c of the angle member 11. It is fixed with screws etc.

The position of each sensor 46A, 46B, and 46C is as follows:
The paper guide member 8 when the light is shielded by the light shielding portion 45a of 5
Is at the position shown in FIG. 6, the sensor 46B is at the position shown in FIG. 7 when the light is blocked, and the sensor 46C is at the position shown in FIG. 8 when the light is blocked.

Then, the detection signals from the sensors 46A, 46B and 46C and the signals generated when the paper selection buttons 6a to 6c on the operation panel 5 are pressed are input to the control circuit 50 shown in FIG. The control circuit is composed of a microcomputer (CPU) having various judgment and processing functions,
A signal is output to the motor drive circuit 51 to control the forward / reverse rotation of the motor 42, and each display lamp LED ₁ to
It also controls the lighting of LED ₃ .

Next, the judgment and processing according to the present invention executed by the CPU of the control circuit will be described with reference to the flowchart of FIG.

First, when a main switch (not shown) is turned on, the program starts, and in step 1, the signal of each input port is read. Then, it is determined in step 2 whether the sensor 46A is off, that is, whether the paper guide member 8 is in the position shown in FIG. 6, and if not (NO) step 3
If there is (YES), the indicator lamp LED ₁ is turned on in step 4 (YES).

In step 3, it is judged whether or not the sensor 46B is off, that is, whether the paper guide member 8 is in the position shown in FIG. 7, and if not, the process proceeds to step 5, and if so, the display lamp LED ₂ is turned on at step 6. Light.

In step 5, it is judged whether or not the sensor 46C is off, that is, the paper guide member 8 is in the position shown in FIG. 8, and if not, the process proceeds to step 7, and if there is, the display lamp LED ₃ is turned on at step 8. Light.

In step 7, it is judged whether or not any one of various instruction buttons including the paper selection buttons 6a to 6c on the operation panel 5 is pressed (ON), and if any button is pressed, the process proceeds to step 9. Proceed and if not pressed, wait until pressed.

Then, in step 9, it is judged whether or not the plain paper button 6a is pressed, and if so, the process proceeds to step 10, and if not, the process proceeds to step 11.

In step 10, the sensor 46A is determined whether the OFF, it since the paper guide member 8 if off in the position of Figure 6, and light the display lamp LED ₁ proceeds to step 12 Proceed to the next step, and if not off, the paper guide member 8 is in a position other than that shown in FIG. Rotate in the opposite direction to E.

Then, in step 14, the motor 42 is rotated in the reverse direction until the sensor 46A is turned off, and when the motor 42 is turned off (the light shielding plate 45 causes the sensor 46A to turn off).
Move to position A), stop motor 42 and step 12
Turn on the indicator lamp LED ₁ with.

On the other hand, if the process advances from step 9 to step 11, it is judged whether or not the book button 6b is pressed, and if so, the process proceeds to step 15, and if not, the process proceeds to step 16.

In step 15, it is judged whether or not the sensor 46A is off, and if it is off, the paper guide member 8 is in the position shown in FIG. 6, so the motor 42 is rotated forward in step 17 (see FIG. 9). The paper guide member 8 and the light shielding plate 45 are rotated in the direction of arrow E).

Then, in step 18, the motor 42 is rotated forward until the sensor 46B is turned off.
Move to position B) Stop motor 42 and
To turn on the indicator lamp LED ₂ .

If the sensor 46A is not turned off in step 15, (NO)
The sensor 46B is determined whether the OFF proceeds to step 20, it is because the sheet guide member 8 if off in the position of the FIG. 7, light the display lamp LED ₂ in step 19 If it is not turned off, the paper guide member 8 is at the position shown in FIG. 8, so the motor 42 is rotated in the reverse direction at step 21 to move the paper guide member 8 and the light shielding plate 45 in the direction opposite to the arrow E of FIG. Rotate.

Then, in step 22, the motor 42 is reversely rotated until the sensor 46B is turned off, and when it is turned off, the motor 42 is stopped and the indicator lamp LED ₂ is turned on in step 19.

Further, when the process proceeds from step 11 to step 16, it is determined whether or not the long button 6c is pressed, and if so, the process proceeds to step 23, and if not, other than the paper selection button on the operation panel 5. Since, for example, the instruction button for manuscript size, reduction ratio, etc. has been pressed, the process proceeds to step 24 and the processing based on the instruction content of the instruction button is executed.

At step 23, it is judged whether or not the sensor 46C is off. If it is off, the paper guide member 8 is at the position shown in FIG. 8, so at step 25 the indicator lamp LED ₃ is turned on,
If it is not off, the motor 42 is rotated forward in step 26.

Then, in step 27, the motor 42 is rotated forward until the sensor 46C is turned off.
Move to position C) Stop motor 42 and set to step 25
Turn on the indicator lamp LED ₃ with.

The control circuit 50 of FIG. 10 executes the various judgments and processes described above, and when the plain paper button 6a is pressed, the step 12,
After executing the processing of step 19 when the book button 6b is pressed and the processing of step 25 when the long button 6c is pressed,
The control for driving the paper guide member 8 is completed, and the process proceeds to the next step.

In each of the above-mentioned embodiments, when a standard plain paper and a paper of a different length (for example, a length exceeding AO) are used as originals, the originals have different guide surfaces 8a and curved guide surfaces. When a thick and heavy original such as a plain paper and a book is used for guiding with 8b, the same guiding surface 8a is used for common guiding. However, for example, a paper guiding member has three or more sides. It may be shaped, and each side of the guide surface may be formed so that different dedicated guide surfaces can be selectively used for plain paper and thick and heavy originals.

Further, in each of the above-described embodiments, an example in which the paper discharge device is applied to a document reading device has been described, but the paper discharge device is also used in other copying machines, automatic document feeders of facsimiles, and transfer papers after copying or printing. The present invention can also be applied to a paper discharge unit for discharging paper, a paper discharge unit of a printer, and the like.

Effect As described above, according to the present invention, even if the copy original or transfer paper is a non-standard paper that is long in the feeding direction, the paper can be smoothly discharged, The problem that the paper is damaged or soiled at the time of ejection does not occur.

Further, the paper guide member driving means is driven according to the type of paper selected by the paper selection means, and the paper guide member is displaced to the first position or the second position according to the selected paper type. By providing the control means, the guide surface of the paper guide member suitable for ejecting the paper can be automatically moved to the use position by only selecting the paper type, which improves working efficiency. It also prevents forgetting to change the guide surface of the paper guide member when changing the paper type.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example in which the paper discharge device according to the present invention is applied to a document discharge part of a document reading device, and FIG. 2 is a diagonally upper rear part of the whole document reading device equipped with the paper discharge device. FIG. 3 is an enlarged perspective view showing the outer appearance of the operation panel 5, FIG. 3 is an enlarged plan view showing an essential part of the operation panel 5 of FIG. 2, and FIG. 4 is an enlarged perspective view showing a part of the rotating mechanism 20 of FIG. FIG. 5 is a sectional view showing the internal structure of the biasing guide portion 22 of FIG. 4, and FIGS. 6 to 8 show the state in which the guide surfaces of the paper guide members are fixed at different angles to guide the paper. FIG. 9 is a side view, and FIG. 9 is an enlarged perspective view corresponding to FIG. 4 of another embodiment in which the guide surface of the paper guide member is automatically selected according to the type of paper to be used and brought to the use position, FIG. 10 is a block diagram of the same control unit, and FIG. 11 is a decision diagram executed by the control circuit 50 of FIG. Flow diagram that illustrates the processing, FIG. 12 is a schematic diagram for explaining a problem of the conventional sheet discharging device point. 2 ... Paper ejection roller, 5 ... Operation panel 6a to 6c ... Paper selection button, 7 ... Paper ejection tray 7a ... Paper loading surface, 8 ... Paper guide member 8a ... Guide surface, 8b ... Curved guide surface 10 ... Original reading device Main body 13 ... Shaft 20, 40 ... Rotation mechanism (paper guide member driving means) 41 ... Worm wheel 42 ... Motor, 43 ... Worm 46A to 46C ... Sensor 50 ... Control circuit (CPU), 51 ... Motor drive circuit P, Pb, P _L … Original (paper)

Claims (2)

[Scope of utility model registration request] 1. A sheet discharging device for discharging a sheet onto a sheet discharging tray by means of a conveying force of a sheet discharging roller, in which a sheet is conveyed near the sheet discharging side of the sheet discharging roller. A paper guide member having a linear guide surface for guiding the paper and a curved curved guide surface,
A first position in which the linear guide surface is substantially parallel to the upper surface of the paper discharge tray, and a movement of the paper conveyed by the paper discharge roller with the curved guide surface facing the paper discharge roller. A sheet discharging device, which is displaceably provided at a second position for guiding so as to reverse the direction. 2. The paper discharge device according to claim 1, wherein the paper selection means for selecting the type of paper to be used and the paper guide member are driven so as to be displaced to the first position and the second position. The paper guide member drive means and the paper guide member drive means are controlled according to the type of paper selected by the paper selection means to displace the paper guide member to the first position or the second position. A paper discharge device, which is provided with control means for controlling.