JPH01204563A - Original reader - Google Patents

Abstract

PURPOSE:To prevent mis-recognition by the operator by devising the reader such that the display content and guiding characters of a display means are displayed constant at all times with respect to the operator independently of the normal use or the inversion use of the read means. CONSTITUTION:A scanner unit section 10 is provided with a mercury switch 34 as a detection means detecting whether the scanner unit section 10, that is, the main body 2 and an original platen 3 are used normally or in the inversion state. In case of the normal use, the mercury switch 34 is turned off and in case of the inverting state, the mercury switch is turned on. Then based on the result of detection by the means 34, the vertical direction of the display is controlled so that the read means 10 applies a prescribed direction of display at all times when observed by the operator independently of the normal use or the inversion use of the read means 10 and a guiding character corresponding to the normal use and a guiding character corresponding to the inversion use are provided in the vicinity of the display means. Thus, the mis-recognition by the operator is prevented.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a method for irradiating a document placed on a document table with light,
The present invention relates to a document reading device that reads image information of the document by guiding the reflected light to a reading sensor.

(Prior Art) Conventionally, there are many devices in which a document is placed on a document table provided on the top surface of the main body, and image information of the document is read by optical means.

In this type of document reading device, a document presser is usually rotatably provided in a state where it can overlap on the document placement table, so that the image information of the document can be read by keeping the document in close contact with the document placement table. It has become.

However, when reading a part of a document that is larger than the document table, the part to be scanned cannot be placed in the correct position on the document table unless the document is folded, which makes the task extremely difficult. Not only is it troublesome, but it also has the drawbacks of damaging the original or damaging the adhesion between the original and the original table, which may prevent good reading.
If you want to scan a part of a document that is larger than the document table, spread out the document, place it on a flat surface, and turn the scanner body over the part of the document you want to read. A device designed to read the information is being considered. Such a document reading device that can be used in reverse is required to be small and lightweight in order to facilitate its handling.

Therefore, as one way to reduce the size and weight of the device, it has been considered to combine a plurality of displays into one display device, which displays the number of readings instructed by the operator, the density of the document, or the status of the device. As a display device provided in such a document reading device, for example, a 7-segment (a-g) L display as shown in FIG.
A device that is composed of an ED and selectively displays the density of the original, the number of scans (number of copies), the status of the device, etc. is being considered. For example, when displaying concentration using this display 7, there are three segments a in the horizontal direction.

Selectively light g + d to make them “dark” and “dark,” respectively.
"Normal" and "Thin" are displayed.

In addition, near the display 7, "dark" and "
Guidance characters 7a such as ``Normal'' and ``Thin'' are written.

However, since such a display is configured to be checked under normal usage conditions (used in a non-inverted state), when the device is used in an inverted state, display contents and guidance such as the above-mentioned concentration display etc. This has the disadvantage that the characters used in the system are also reversed, which may cause the operator to misunderstand the displayed content.

(Problems to be Solved by the Invention) The present invention solves the problem that when the device is used in an inverted state as described above, the displayed contents such as the concentration display and the guide characters are reversed, and the operator may mistakenly read the displayed contents. This was done in order to eliminate the drawback that there is a risk of being recognized as
To provide a document reading device in which display contents can be easily confirmed regardless of whether the device main body is in a normal use state or in an inverted use state, and can prevent an operator from misperceiving the information.

[Structure of the Invention] (Means for Solving the Problems) A document reading device of the present invention includes a reading device for reading image information on a document, and a detection device for detecting whether the reading device is used normally or inverted. , a display means for displaying the displayed object by changing the vertical direction according to the detection result of the detection means, and a guide consisting of guide characters provided near the display means corresponding to the upper and lower directions of the display object, respectively. It is characterized by comprising means.

(Function) The present invention is provided with a detection means for detecting whether the reading means is used normally or inverted, and when the above-mentioned detection means detects normal use, for example, when displaying the original density etc. on the display means. When the above-mentioned detection means detects inverted use, the display is inverted vertically, and in the vicinity of the above-mentioned display means, guidance characters corresponding to normal use and guidance characters corresponding to inverted use are placed as is. It was established. As a result, regardless of whether the reading means is used normally or inverted, the display contents and guide characters on the display means are always displayed in a constant manner from the operator's perspective, making it easy for the operator to visually confirm the displayed contents. It is something that can be done.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 shows the external appearance of an image forming apparatus (scanner printer) 1 to which the original reading device of the present invention is applied. In the figure, 2 is the main body of the apparatus, and on its upper surface is a document mounting table made of a transparent acrylic plate. The original table (original table) 3 and the original holding member (platen cover) 4 are in a state where they are sequentially superposed. Furthermore, on the front side there is a copy button 5 and a number setting button 6.
．． A display 7 consisting of seven segments, document density designation switches 12, 13, and 14 are provided, and a power switch 8 is provided on the left side.

The display device (display means) 7 is composed of seven segments a to g, as shown in FIG. 1, and each segment a to g is used to display, for example, the number of sheets. The designated state (instruction, input state) of the document density is displayed using the three segments asgsd. Above original density switch 12.13
．． Reference numerals 14 and 14 designate the original density. The original density designation switch 12 is turned on when the original density is high, the original density designation switch 13 is turned on when the original density is normal, and the original density designation switch 14 is turned on when the original density is normal. It is designed to be input when the original density is low.

As shown in FIG. 3, the document presser 4 can be opened and closed via a hinge portion 9 formed of a thin wall formed along its rear edge so that it can be retracted from above the document placement table 3. .

As shown in FIGS. 4 and 5, the image forming apparatus 1 also includes a scanner unit section 10 as a reading device for reading image information of a document placed on a document table 3; The printer unit 11 serves as a recording device that records and outputs the image information read on recording paper P as a visible image on recording paper P.

The scanner unit section 10 includes a xenon lamp 15 as a light source that illuminates the document tray, a mirror 16 that horizontally reflects the light reflected from the document tray, and a mirror 16 that receives the reflected light reflected by the mirror 16. It has an optical system 19 including a lens 18 that focuses light onto a CCD sensor 17 as a reduction type reading sensor. Also,
The optical system 19 is housed in an optical system accommodating portion 21 formed within a substantially fan-shaped partition frame 20 formed within the housing 2a of the main body 2 of the apparatus. The upper surface side of the optical system housing section 21 is closed by a cover 2b of the apparatus main body 2, and the lower surface side is closed by a light shielding plate 22. A slit 23 for passing reading light formed in the cover 2b is closed. This prevents light from entering from other sources.

Further, in the scanner unit section 10, short components such as the main control board 26 are placed in a short cavity 25 formed on the lower surface side of the optical system housing section 21. Tall parts such as a battery 28, a motor 29, an inverter (xenon lamp lighting circuit) 97, etc. are housed in the tall cavity 27 that is shifted from the position of the space 27. Note that 30 (indicated by a two-dot chain line) shown in FIG. 4 indicates a mounting area for electronic components (not shown) to be mounted on the main control board 26.

Furthermore, at the lower left side of the scanner unit section 10 as shown in the figure,
A mercury switch 34 is provided as a detection means for detecting whether the scanner unit section 10, that is, the main body 2 and the document table 3 are in a normal use state or an inverted state. The mercury switch 34 is turned off when in normal use and turned on when inverted.

In the normal usage state, as shown in FIGS. 3 and 4, the scanner unit section 10 is facing upward, that is, the document placing table 3 is above the main body 2, and the document placing table 3 is
It is designed to read the document placed above. In this case, the document mounting table 3 is moved along with the reading scan. The above inverted state is the 12th
As shown in the figure, the scanner unit section 10 is facing downward, that is, the document table 3 is below the main body 2,
A document tray facing the lower side of the document table 3 is read. In this case, the main body 2 is moved along with the reading scan.

Further, the printer unit section 11 is removably attached to a printer unit accommodating section 40 formed on the right end side of the apparatus main body 2, and is adapted to the size of the recording paper P (for example, A
3 to A6) can be replaced as appropriate with one equipped with an ink ribbon 41 suitable for A6).

The printer unit section 11 is connected to the printer unit accommodating section 4.
0, the printer unit accommodating portion 40 is mechanically held in a predetermined position by positioning guide means formed in the printer unit accommodating portion 40, and the printer side connector (male connector) 42 protruding from one end thereof is connected to the scanner side. By fitting into the connector (female connector) 43, it becomes electrically connected to the scanner unit section 10.

The printer unit section 11 also includes the connector 42.
A print head (thermal head) 45 is arranged, which is connected to the scanner unit section 10 side through the
A platen feed roller 46, which serves both as a platen roller and a feed roller, is provided opposite the heat generating portion 45a (not shown in detail) of the print head 45.

Furthermore, an ink ribbon supply means 47 that tensions the ink ribbon 41 with a middle part interposed between the heat generating part 45a of the print head 45 and the platen feed roller 46.
has been incorporated. The ink ribbon 41
is fed out from a feeding side core 48 installed parallel to the platen feed roller 46, and is fed out from a winding side core 49.
It is designed to be wound up. - Furthermore, a guide shaft 50 is installed between the platen feed roller 46 and the winding-side core 49, and the amount of winding of the ink ribbon 41 on the platen feed roller 46 is constant, and the ink ribbon 41 is By folding back, the recording paper P and the ink ribbon 41 can be separated well.

In addition, the platen feed roller 46 and the feeding side core 48
A paper insertion port 55 is formed at a position corresponding to the recording paper insertion port 55, and the recording paper P inserted through the recording paper insertion port 55 is guided by a paper guide 56 between the ink ribbon 41 and the circumferential surface of the platen feed roller 46. The ink ribbon 41 is guided into a V-shaped space 57 formed by the ink ribbon 41 and is conveyed while being held between the ink ribbon 41 and the platen feed roller 46 as the platen feed roller 46 rotates. Further, the recording paper P that has passed through the heat generating section 45a is separated from the ink ribbon 41 at the guide shirt 50 which also serves as a separating means, and then guided to a paper discharge port 59 by a paper guide 58 and discharged. It has become.

Further, a drive mechanism section 60 is incorporated in the apparatus main body 2, which uses the motor 29 as a drive source to reciprocate the document table 3 and drives the platen feed roller 46 and the take-up core 49. It becomes.

That is, the scanner unit section 10 includes a first timing pulley (drive pulley) 65 attached to the drive shaft 29a of the motor 29, as shown in FIGS.
and a second gear 67 interlocked with each other via a timing belt 66, and to which a first gear 67 as a driving gear is integrally attached.
A timing pulley (driven pulley) 68 is rotatably provided.

As shown in FIG. 5, a first drive force transmission system 69 for driving the original platen and a second drive force transmission system for driving the platen feed roller are connected to each other using the first gear 67 as a drive source. A system 70 is provided.

As shown in FIGS. 5 and 7, the first driving force transmission system 69 includes a second gear 71 that meshes with the first gear 67, and a third gear 72 that is integral with the second gear 71. And this third
A fourth gear 73 as a binion meshing with the gear 72 of
The fourth gear 73 is in mesh with a rack 76 attached to a rear movable frame 75 that is connected to the original table 3 via a connecting means 74.

Therefore, when the first gear 67 serving as the driving gear rotates in the direction of the solid line arrow due to the rotation of the motor 29 in the forward direction (the direction of the solid line arrow in FIG. 5), the second gear 67 constituting the first driving force transmission system 69 rotates. The gear 71, the third gear 72, and the fourth gear 73 as a pinion rotate in the direction of the solid line arrow, respectively, and move the rack 76 in the direction of the solid line arrow in FIG.

As a result, the rear frame 78 of the main body is inserted through the slide rail 77.
The rear movable frame 75, which is reciprocably attached to the rear movable frame 75, and the document mounting table 3, which is connected to this via the connecting means 74, move forward.

Further, when the first gear 67 serving as the driving gear rotates in the direction of the broken line arrow due to the rotation of the motor 29 in the opposite direction (the direction of the broken line arrow in FIG. 5), the second gear 67 constituting the first driving force transmission system 69 rotates. The gear 71, the third gear 72, and the fourth gear 73 as a binion rotate in the direction of the dashed arrow, and the rack 7
6 in the direction of the dashed arrow in FIG.

As a result, the rear frame 78 of the main body is inserted through the slide rail 77.
The rear movable frame 75, which is attached so as to be reciprocally movable, and the document placement table 3, which is connected to the rear movable frame 75 through the connecting means 74, move back.

Further, the second driving force transmission system 70 for driving the platen feed roller includes a fifth gear 80 that meshes with the first gear 67 as the driving gear, as shown in FIGS. 5 and 8. , a third timing pulley 82 that interlocks with this fifth gear 80 via a ratchet type one-way clutch 81, and a fourth timing pulley 82 that interlocks with this third timing pulley 82 via a second timing belt 83. A timing pulley 84, a first helical gear 85 integral with the fourth timing pulley 84, a second helical gear 86 meshing with the first helical gear 85, and a second helical gear 86 that meshes with the first helical gear 85. A fifth timing pulley 87 integrated with the helical gear 86
, a sixth timing pulley 89 interlocked with this fifth timing pulley 87 and a third timing belt 88 , and a seventh timing pulley 89 integrated with this sixth timing pulley 89 .
The seventh timing pulley 90 and the fourth timing belt 91 interlock with each other, and the drive shaft 46 of the platen feed roller 46
The eighth timing pulley 92 is fitted into the timing pulley 92a.

When the first gear 67 serving as a driving gear rotates in the direction of the solid line arrow due to the rotation of the motor 29 in the forward direction (the direction of the solid line arrow in FIG. 5), the fifth gear 80 meshing with the first gear 67 rotates in the direction of the solid line arrow.
rotates in the direction of the solid line arrow, and this rotational force is transmitted to the third timing pulley 82 via the one-way clutch 81. Further, a second timing belt 83, a fourth timing pulley 84, a first helical gear 85, a second helical gear 86, a fifth timing pulley 87, a third timing belt 88, a sixth timing belt timing pulley 89, seventh timing pulley 90. Fourth timing belt 9
1 and then to the eighth timing pulley 92.

This causes the platen feed roller 46 to move in a predetermined direction (
It will rotate in the direction of the arrow in FIG. At this time, the document placing table 3 is in the forward movement process of scanning the document tray via the first driving force transmission system 69 described above.

Further, when the motor 29 rotates in the opposite direction (in the direction of the broken line arrow in FIG. 5) to move the original fi placing table backward, the first gear 67 as a driving gear rotates in the direction of the broken line arrow. No. 5 gear 80 rotates in the direction of the dashed arrow, but this rotational force is not transmitted to the third timing pulley 82 due to the movement of the one-way clutch 81, and therefore the platen feed roller 46 and the winding-side core 49 rotate in the opposite direction. There's nothing to do.

Further, the fifth gear 80 is a gear biasing means 1 which will be described later.
00, the first gear 67 as a driving gear is elastically engaged with the first gear 67 as a driving gear, and the driving force can be effectively transmitted to the printer unit section 11 which is detachable from the apparatus main body 2. It looks like this. That is, as shown in FIGS. 8 and 9, the printer unit section 11 is provided with an arm 102 that is rotatable about a pivot shaft 101, and the fifth arm is attached to one end of this arm 102. A gear 80 is installed coaxially with a one-way clutch 81, a third timing pulley 82, and the like. The pivot shaft 101 also includes the first helical gear 85 and the fourth helical gear 85.
A timing pulley 84 and the like are provided coaxially.

On the pivot end side of the arm 102, one end is connected to a spring receiving member 1.
03 is connected to the other end of the tension spring 104, and the fifth gear 80 is connected to the housing 1 of the printer unit section 11.
It is in a state where it is constantly biased in the direction of protruding outward from the opening (not shown) formed in 05 (in the direction of the arrow in FIG. 9).

Further, as shown in FIG. 10, a seventh timing pulley 9 is connected to the winding side core 49 for winding the ink ribbon 41 via a third driving force transmission system 110 for the winding side core.
A rotational force of 0 is transmitted.

The third driving force transmission system 110 has the following configuration. That is, a disk 113 having a felt 112 is rotatably provided on a shaft 111 that rotatably supports the sixth and seventh timing pulleys 89, 90. This disk 113 and the end of the seventh timing pulley 9o are connected via a truncated conical compression spring 114, and the seventh timing pulley 9o
A rotational force of 0 is applied to the disc 11 via this compression spring 114.
3, and the felt 112 is constantly biased so as to come into pressure contact with the disk 115 press-fitted into one end of the winding-side core 49.

Thus, the rotational force of the seventh timing pulley 90 is transmitted to the disk 113 equipped with the compression spring 114 and the felt 112, and further transmitted to the disk 115 by the frictional force between the felt 112 and the disk 115,
The winding-side core 49, which is integral with the core 15, is rotated.

The rotational speed of the winding-side core 49 at this time is set to be faster than that of the platen feed roller 46, and even when the winding amount of the ink ribbon 41 of the winding-side core 49 is small and the peripheral speed is slow. The ink ribbon 41 can be wound up without loosening.

At this time, when a predetermined tension is applied to the ink ribbon 41, slippage occurs between the felt 112 and the disk 115, so that rotational force is not transmitted to the winding-side core 49. In FIG. 10, 116 is a support member, 117 is an ink ribbon holder, and 118 is a stopper for preventing the disc 113 from coming off.

Further, as shown in FIGS. 5 and 11, the lens 18 of the optical system 19 of the scanner unit section 10 is connected to the partition frame 2.
It is accommodated in a U-shaped lens storage recess 121 surrounded by ribs 120 protruding from the 0 etc.
The pressing is fixed by a leaf spring 123 attached by 22.

In addition, as shown in FIG. 17, the document presser 4 that covers the document placement table 3 has a first fastener 1 formed of a loop-shaped portion.
30a and a second fastener 130 consisting of a hook-shaped portion
It can be attached and detached extremely easily using a flat fastener consisting of a so-called velcro tape (velcro tape) 130.

When the original holding plate 4 is removed, the original placing table 3 forms the uppermost surface of the main body 2 of the apparatus. In the case of a document tray larger than the document table 3, the image forming apparatus 1 can be used by inverting the image forming apparatus 1 with the document presser 4 removed, as shown in FIG.

Further, as shown in FIGS. 23 and 14, the rear end frame portion of the frame member 135 of the document placement table 3 is connected to the rear movable frame 75 via the hinge 136, and this document The table 3 is rotatable as shown in FIG. 14. As shown in FIG. 15, when the image forming apparatus 1 is used upside down, it is possible to align the document placement table 3 to a predetermined position on the document tray while visually observing the document tray. Further, a scale 137 is provided around the document mounting table 3, so that alignment with a document matching the size of the recording paper P can be performed extremely easily.

Further, the front edge side (free end side) of the document placement table 3 is slidably supported on the upper surface of the apparatus main body 2 via a support means 138, and the pivot end side is on the side of the document placement table 3. The magnetic body 139 and the rear movable frame 75 provided in
The flatness with respect to the apparatus main body 2 is maintained by suction means 141 consisting of a magnet 140 attached to the horizontal piece of the apparatus.

Next, the configuration of the control circuit will be explained using FIG. 18. That is, the CPU 90 controls the entire system. The ROM 191a stores a control program that controls the CPU 190 and the size of paper in the sub-scanning direction (
This is a read-only memory that stores timing programs corresponding to A4 to A6). For example, the count value in the sub-scanning direction should be changed for A4 size paper and A6 size paper.
size count value is small), the driving time of the motor 29 is changed. The ROM 19 lb is a read-only memory that stores timing programs corresponding to paper sizes (A4 to A6) in the main scanning direction. For example, the output range of the CCD sensor 17 handled by the image correction circuit 93 is set differently for A4 size paper and A6 size paper.

The photoelectric conversion circuit 192 converts the signal from the COD sensor 17 into an electrical signal. Image correction circuit 93
The photoelectric conversion circuit 192 performs image correction such as shading correction on the photoelectric conversion output from the photoelectric conversion circuit 192 and outputs a digital image signal. In this image correction circuit 93, the range (main scanning direction) of output from a register (not shown) in which one line of image data supplied from the photoelectric conversion circuit 192 is stored is limited by a programmable counter (not shown) or the like. By doing so, image signals corresponding to each size of A4 to A6 are output. The binarization circuit 94 binarizes the digital image signal from the image correction circuit 93 and outputs it.

The driver 96 drives the motor 29. The inverter 97 drives the xenon lamp 15 to turn on.

The display control section (display means) 98 drives and controls the display state of the display 7. That is, when the mercury switch 34 is off (normal usage state),
The CPU 190 sends a code for normal concentration display to the display control section 98, and the signal decoded by the display control section 98 is sent to either segment aSg or d of the display 7 composed of seven segments of LEDs. The concentration is displayed by lighting up.

On the other hand, when the mercury switch 34 is on (inverted state), the CPU 90 uses a conversion table 190a which has a code for displaying the normal concentration inside the CPU 190, and converts the code for displaying the normal concentration to the inverted display. The signal is converted into a code and sent to the display control unit 98, and the signal decoded by the display control unit 98 lights up either segment aSg or d of the display 7, which is composed of 7 segments of LEDs. The concentration is displayed to the operator in a normal state.

The conversion table (display means) 190a shown in FIG. 1 converts a code for lighting segment a into a code for lighting segment d, and a code for lighting segment d into a code for lighting segment a. be. δ, the code for lighting segment g is such that the original code is output even after conversion.

Further, on both sides of the display 7, guiding characters (guiding means) 7a and 7b are written for displaying the density and the number of sheets, so that they can be used in either normal use or reverse use. ing. For example, as shown in Figure 1, on the right side, "copy density" and "
Guidance characters 7 such as "dark", "normal", "thin", "sheet", etc.
a is written, and on the left side, corresponding to the state of inverted use, "
Copy Density”, “Dark”, “Normal”, “Light”, “Sheets”
Guidance characters 7b such as the following are written.

When the power switch 8 is turned on, the CPU 190 first performs the following steps.
The display 7 is used for an initial predetermined time to display the designated state of the original density, then "0" is displayed, and when the ready state is reached, "1" is displayed. For example, when the main body 2 is in normal use, if the document density is set to high, only segment a is lit, and if the document density is set to normal, only segment g is lit. If the original density is set to be light, only segment d is lit. On the other hand, when the main body 2 of the apparatus is in reverse use, only segment d is lit when the original density is set to high, and only segment g is lit when the original density is set to normal. When the original density is set to be light, only segment a is lit.

The CPU 190 has a document density switch 12.13.1.
In response to the designation of 4, the binarization level of the binarization circuit 94 is changed, and the display 7 is used to display the designated state of the document density, and then "1" is displayed. It has become. For example, when the main body 2 of the apparatus is in normal use, when the original density switch 12 is turned on, the binarization level of the binarization circuit 94 is set high, only segment a is lit, and the original density switch 13 is turned on. If it is inserted,
The binarization level of the binarization circuit 94 is used as a mark, and when only segment g is lit and the document density switch 14 is turned on, the binarization level of the binarization circuit 94 is lowered and only segment d is turned on. It is now lit. On the other hand, if the main body 2 of the apparatus is in reverse use, the original density switch 1
2 is turned on, the binarization level of the binarization circuit 94 is set high, only segment d is lit, and when the document density switch 13 is turned on, the binarization level of the binarization circuit 94 is set to standard. When only segment g is lit and the original density switch 14 is turned on, the binarization level of the binarization circuit 94 is lowered and only segment a is lit.

Next, the handling and operation of the image forming apparatus 1 configured as described above will be explained.

First, a case will be described in which the device main body 2 is used in a normal usage state. That is, the power switch 8 is turned on. As a result, the CPU 190 uses the display 7 for an initial predetermined period of time to display the designated state of document density, then displays rOJ, and when the ready state is reached, displays "1". At the time of each of these displays, if the device main body 2 is in normal use, the mercury switch 34 is off, so the CP
U190 sends a code indicating a normal display, for example, when displaying a designated state of density, a code corresponding to each designated state to display control section 98, so that the set state of document density is dark. In the case of normal, only segment a is lit, in the case of normal, only segment g is lit, and in the case of dim, only segment d is lit.

In addition, in the above-mentioned ready state, the original designation switch 12
．． 13 or 14, the above CPU1
90 changes the binarization level of the binarization circuit 94, uses the display 7 to display the designated state of document density for a predetermined period of time (2 to 3 seconds), and then displays "1". do.

For example, when the original density specification switch 12 is turned on,
The binarization level of the binarization circuit 94 is increased, and segment a
When only segment g is lit and the original density designation switch 13 is turned on, the binary level of the binarization circuit 94 is set as the standard, and only segment g is lit and the original density designation switch 14 is turned on, the binary level is set. The binarization level of the conversion circuit 94 is lowered, and only segment d is lit.

Next, the printer unit section 1 is detected by a detection means (not shown).
Size of printer connected to 1 ('A4 to A6)
is detected, and based on this detection result, the auxiliary operation timing program corresponding to the detected size is selected in the ROM 191a, and the drive time of the motor 29 corresponds to the length of the detected size. Also, ROM191
In b, the main operation timing program corresponding to the detected size is selected, and the output from the image correction circuit 93 corresponds to the width of the detected size.

In such a state, as shown in Fig. 4, when reading a document of the size (A4 to A6 size) that would be placed on the document tray 3 in normal use with the document tray 3 on top. Then, the document placed on the document table 3 is held down by the document presser 4, and the recording paper P is set in the printer unit section 11.

After setting the number of copies using the number setting button 6, the user presses the copy button 5. At this time, the number of sheets corresponding to the set number of sheets is displayed on the display 7. As a result, first, the motor 29 of the drive mechanism section 60 once rotates in the reverse direction (rotates in the direction of the broken line arrow in FIG. 5), and the rotational force is applied to the first
By the action of the power transmission system 69 (see FIGS. 5 and 7), the movement is converted into a backward motion of the original document loading table 3, and the original document loading table 3 moves to the starting position.

Next, the xenon lamp 15 of the optical system 19 of the scanner unit section 10 is turned on, and the drive mechanism section 60 is turned on.
The motor 29 rotates in the forward direction (in the direction of the solid line arrow in FIG. 5), and its rotational force is transferred to the first power transmission system 69.
Due to the action of , the document placing table 3 is converted into a forward movement, and the document placing table 3 starts forward movement. As a result, the image plane of the original is scanned, and the reflected light is guided to the COD sensor 7. The signal from this COD sensor 7 is photoelectrically converted by a photoelectric conversion circuit 192 and output to an image correction circuit 93. As a result, the image correction circuit 93 performs image correction such as shading correction on the photoelectric conversion output, and converts the image signal corresponding to the width of the detected size into the binarization circuit 94.
Output to.

Thereby, the binarization circuit 94 binarizes the image signal from the image correction circuit 93 at the above-mentioned binarization level and outputs it to the drive circuit 95 of the printer unit section 11.

On the other hand, in the printer unit section 11, the drive mechanism section 6
Second driving force transmission system 7 for platen feed roller 0
0 (see FIGS. 5 and 8), the platen feed roller 46 rotates, and the recording paper P and the ink ribbon 41 are rotated.
is sent at a predetermined speed, and the heating element group (not shown) of the heating section 45a of the print head 45 selectively generates heat by the drive circuit 95, so that the recording paper P corresponds to the width of the detected size. Recording, that is, copying, is performed using the image signal for each line.

Note that the recording paper P and the ink ribbon 41 are separated by a guide shaft 50 serving as a separating means, and the recording paper P
is discharged from the paper outlet 59, and the ink ribbon 41 is wound onto the rotating take-up core 49 via the third power transmission system 110 for the take-up core (see FIGS. 5 and 10). taken.

In this way, when the copying of the document, that is, the scanning corresponding to the length of the detected size is completed, the xenon lamp 15 is turned off and the motor 29 of the drive mechanism section 60 is turned off.
rotates in the opposite direction, the document placing table 3 moves back, and the main body 2 of the apparatus rotates.
It will return to the home position that overlaps with .

In addition, if the document tray is thick such as a book, the document presser 4 should be left open as shown in FIG. 3, or the document presser 4 should be left open as shown in FIG. It will be used with 4 removed.

In addition, when reading a part of a document that is larger than the size of the document placement table 3, first remove the document presser 4 as shown in FIG. As shown in FIG. 12, the original is placed on the original plate, and the original plate is copied in this state.

In this case, since the mercury switch 34 is on, the CP
When the UI 90 displays information on the display 7, code conversion is performed for inverted display, so that the display is in a normal display state when viewed by the operator. In other words, if we take the case of displaying the original density as an example, the CPU 190
detects that the mercury switch 34 is on, converts the code indicating normal display into a code indicating reverse display using the conversion table 190a inside the CPU 90, and sends the code to the display control unit 98. If the setting state of the document is dark, only segment d is lit, if it is normal, only segment g is lit, and if it is light, only segment a is lit.

In this way, even when the main body 2 of the apparatus is placed upside down, the document density is displayed to the operator in the same manner as it is normally displayed. Hatchet, the above number rOJ, "1"
Similarly, in the case of the display, these numbers are made to look like statues when viewed from the operator.

At this time, as shown in FIG. 16, the document placement table 3 remains in close contact with the document surface, and the apparatus main body 2 side is moved. Therefore, copying can be performed without folding the document sheet.

Therefore, compared to the conventional method of folding and setting a document tray, this work is extremely easy, and it also prevents damage to the document tray and poor reading due to loss of adhesion between the document tray and the document table 3. It is possible to prevent such things as inviting.

In addition, in such a state of use, alignment with the document tray can be easily performed by visually observing from the back side of the document placement table 3 as shown in FIG. This facilitates alignment corresponding to the size of the recording paper P.

In addition, the document holder that covers the document table can be separated.
When the document holder is separated, the document placing table forms the top surface of the main body of the device, so it can be used not only for normal use, in which a document is placed on the document placing table, but also for use as needed. It can be used upside down, allowing you to scan the necessary parts without folding large documents.Furthermore, when the device is turned over, the document placement table becomes the bottom surface of the device, so the document and document placement table are in close contact with each other. condition, and good reading can be performed.

Furthermore, a detection signal detected by the mercury switch 34 to detect the installation state of the device main body 2 is sent to the CPUI 90.
When 0 displays the document density on the display 7, this detection signal is referenced so that the display is always the same as the normal installation condition when viewed from the operator, so that the displayed content is This makes it easier to see and eliminates the inconvenience of an operator misperceiving the displayed content. In addition, two types of guide characters are written near the display 7: one to refer to when the device is in normal use and the other to refer to when in reverse use. The meaning of the displayed contents can be easily confirmed regardless of whether the display is used in reverse.

Although the reading device of the present invention has been described as being integrated with a plink unit as a recording device, the present invention is not limited to this, and it goes without saying that it may be used alone.

Further, in the above embodiment, a case has been described in which the display is switched between a standing image and an inverted display according to the detection result by a detection means such as a mercury switch. Good too.

Furthermore, in the above embodiment, the case where the density of the original is displayed has been described, but the invention is not limited to this, and when displaying the number of copies, other conditions such as error status of the device and other conditions that should be notified to the operator, etc. It is applicable to displaying various states, such as displaying state display information.

In addition, it goes without saying that the present invention can be modified in various ways without departing from the gist.

[Effects of the Invention] As explained above, according to the present invention, a detection means is provided for detecting whether the reading means is used normally or inverted,
For example, when displaying document density, etc. on a display means, based on the detection result of this detection means, the information displayed on the display means may be changed from the operator's perspective regardless of whether the reading means is used normally or inverted. , the display is controlled in the vertical direction so that the display is always in a fixed direction, and guide characters corresponding to normal use and guide characters corresponding to inverted use are provided near the display means. It is possible to provide a document reading device in which display contents can be easily confirmed regardless of whether the device main body is in a normal use state or in an inverted use state, and can prevent an operator from misperceiving the information.

[Brief explanation of the drawing]

1 to 18 show an embodiment of the present invention, and FIG. 1 is a diagram showing a display and guide characters of an image forming apparatus to which an embodiment of the document reading device of the present invention is applied. 2 is an external perspective view of the image forming apparatus, FIG. 3 is a perspective view of the document holder in an open state, FIG. 4 is a schematic front view showing the internal mechanism, and FIG. 5 is the same internal mechanism. FIG. 6 is a schematic plan view showing the configuration of the drive source side of the drive mechanism section as viewed from the rear side, and FIG. 7 is a schematic plan view showing the drive force transmission system for the document mounting table of the drive mechanism section. 8 is a schematic side view showing a driving force transmission system for the platen feed roller of the drive mechanism section; FIG. 9 is a schematic plan view showing a gear biasing means of the driving force transmission system for the platen feed roller. FIG. 10 is a schematic vertical sectional side view showing the driving force transmission system for the winding core, FIG. 11 is a side view showing how the lens is attached, and FIG. 12 is an inverted image forming apparatus. 13 and 14 are schematic side views showing the state in which the document mounting table is installed, and FIG. 15 is a perspective view showing the alignment state with the document when used in reverse. Fig. 16 is an explanatory diagram schematically showing the operating state during reversal use, Fig. 17 is an exploded perspective view showing the state in which the document holder is separated from the main body of the apparatus, and Fig. 1
FIG. 8 is a block diagram schematically showing the overall configuration of the electric circuit, and FIG. 19 is a diagram showing a conventional display and guide characters. 2...Device body, 6...Number of sheets setting button, 7...
Display device (display means), 7a, 7b... Guidance characters (guidance means), 10... Reading device (reading means), 12゜1
3.14... Original density specification switch, 34... Mercury switch (detection means), 98... Display control section (display means), 190-CPU, 190 a-... Conversion table (display means), D...Manuscript. Applicant's Representative Patent Attorney Takehiko Suzue No. 1A Figure 19 Figure 9 Figure 10 Figure 11 Figure 15 Figures 7, -9 Figure 17

Claims (1)

[Scope of Claims] A reading means for reading image information on a document; a detection means for detecting whether the reading means is used normally or inverted; What is claimed is: 1. A document reading device comprising: a display means for displaying; and a guide means formed of guide characters provided in the vicinity of the display means corresponding to the upper and lower directions of the display object.