JPH0576165U - Image reader - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to an image reading apparatus, in which the reference position for placing a transparent original on the platen is indicated by a mark, so that the optimum reference position can be easily found and the transparent original is detected. It is possible to copy neatly, and by providing the movement control means for controlling the traveling body, the optimum reference position of the original is indicated, and the copy operation when copying the film original and the ordinary original is performed in the same manner. To improve
The purpose is to provide a transparent original mode display so that copying can be performed only by operating the transparent original size. An image forming apparatus having a backlight for projecting a transmission type original on a platen on an optical system side and a reading optical system for scanning the transmission type original to read image information of the transmission type original, A mark is provided on the cover of the moving body that moves in the scanning direction of the reading optical system, the mark indicating the reference position on which the transparent original is placed on the original table.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an image reading device, for example, a copying machine and a facsimile device, and more particularly to an image reading device for reading transmissive image information.

[0002]

[Prior Art]

 As a conventional image reading apparatus, for example, when a transmissive film original is placed on the contact glass of a copying machine for copying, the image information of the film original on the contact glass is projected on the reading optical system in the copying machine. , Install a projector or backlight above the contact glass. Then, the light from the backlight is projected onto a transmissive original, and image information is projected through a contact glass onto a scanner of a reading optical system in the copying machine.

The scanner scans the image information in the main scanning direction, and moves in the sub-scanning direction along the document in the copying machine to read the image information and perform optical processing.

[0004]

[Problems to be solved by the device]

 However, in such a conventional image reading device, there is uneven light amount of the backlight and uneven light amount received at both ends in the main scanning direction of the scanner, and a good image can be obtained. Absent. In addition, it was inaccurate where on the contact glass the backlight was shining, and it was difficult for the user to understand the position of the original set.

The present invention has been made against the background of such conventional problems. In advance, a portion where the light amount of the backlight is appropriate and the light in the main scanning direction of the scanner is uniform is obtained. By marking the optimum reference position for setting the transmissive original with a mark, the user can easily find the optimum reference position for setting the transmissive original, and can make a clean copy of the transmissive original. By providing the movement control means for controlling the movement of the traveling body at the time of copying operation, the optimum reference position of the transparent type original is shown, and the traveling type is the same as when the non-transparent type original is copied. Movement control is performed to improve operability. Furthermore, by providing a transparent original mode display on the operation section, the movement control means operates only by operating the transparent original size to optimize the original. It is an object of the present invention to provide an image reading device that can be copied at the reference position of and can further improve the operability of the user.

[0006]

[Means for Solving the Problems]

 According to a first aspect of the present invention, there is provided a backlight for projecting a transmission type original on a platen on an optical system side for reading and a reading optical system for scanning the transmission type original to read image information of the transmission type original. An image forming apparatus having the above is characterized in that a mark showing a reference position for mounting the transparent original on the original table is provided on a cover of a traveling body which moves in a scanning direction of the reading optical system.

According to a second aspect of the present invention, in addition to the structure of the first aspect, when the transparent original is copied, the traveling body moves to an optimum position indicating the reference position on which the transparent original is placed. After the transparent original is set at the reference position and the copy start button is pressed, the traveling body returns to the home position and then scans and moves.

According to a third aspect of the present invention, in addition to the configuration of the second aspect, a transparent original mode display for copying the transparent original is provided in the operation unit of the image reading device to specify the original size of the transparent original. Then, the movement control means is activated and the document size is displayed.

[0009]

[Action]

 According to the first aspect of the present invention, since the mark for indicating the reference position on which the original is placed is provided on the cover of the running body, the optimum reference position is set by aligning the transparent original on the contact glass with the mark while observing the mark. Set to. According to the second aspect of the present invention, since the moving body is provided with the movement control means for moving to the optimum position indicating the reference position on which the transparent original is placed, the transparent original is set on the contact glass of the moving original. It is accurately set to the reference position according to the mark on the cover, and then the copy start button is pressed to return the carriage to the home position and then scanning is started. The copy operation of is the same as that of a normal original, and the operation of a normal original can be used as it is. According to the third aspect of the invention, since the transparent original mode display is provided on the operation section, when the original size in the transparent original mode of the operation section is pressed, the movement control means is activated and the traveling body is a transparent original. The document size is displayed while moving to the optimum position corresponding to the size and stopping.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of an image reading apparatus according to claims 1 to 3 of the present invention. First, the configuration will be described. In FIG. 1, 11 is an image reading device, and the image reading device 11 is applied to a copying machine 10. The copying machine 10 has a body 10A of the copying machine having a contact glass 13 which is a platen for placing a film original 12 which is a transparent original on the upper surface of the copying machine 10, and a box having a light source built in above the contact glass 13 of the main body 10A. It has a backlight 15 in the shape of. The backlight 15 illuminates the original 12 on the contact glass 13 through the window on the side of the contact glass 13, and projects the image information of the original 12 onto the reading optical system side for reading this image information.

A reading optical system 16 that scans the original 12 and reads the image information projected through the contact glass 13 is housed in the main body 10 A. The reading optical system 16 holds a rectangular first mirror 17 which is long in the main scanning direction A for reading the original 12 and reflects the read image information, and a fluorescent lamp 18 which is a light source for irradiating an ordinary non-transmissive original. The first carriage 20, which is a moving body that can be moved by a scanner motor and a guide rail 19 (not shown) in the sub-scanning direction of the original 12, and the second carriage for reflecting the reflected light from the first mirror 17 to the lens house. , And a second carriage (not shown) that holds three mirrors and is movable in the sub-scanning direction B.

As shown in FIG. 1B, the first carriage 20 holds a first mirror 17 and a fluorescent lamp 18, and has a cover 21 long in the main scanning direction A to shield unnecessary light. There is. In the sub-scanning direction B of the cover 21, a long flat plate 22 which is long in the main scanning direction and protrudes in the sub-scanning direction is fixed, and the original 12 is positioned on the long flat plate 22 when the original 12 is placed on the contact glass 13. A mark 23 indicating a reference position for performing is provided. In FIG. 1B, a mark 23A indicating a reference position for a 4 × 5 film original and a mark 23B indicating a reference position for an overhead projector (OHP) are shown. Of course, a mark for a 6 × 6 film original or the like may be added. Needless to say, these marks 23 are uniform areas 24 in which the light amount of the backlight 15 is proper and the light in the main scanning direction A is uniform.

The image reading device 11 has a movement control means 26 for controlling the movement of the first carriage 20 in the sub-scanning direction B. The movement control means 26 includes a guide rail 19 that moves the first carriage 20 in the sub-scanning direction B, a guide cable and a scanner motor (not shown) that move the first carriage 20 on the guide rail 19, and a document 12 When making a copy, a positioning sensor 27 is provided at an optimum position P for each size of the first carriage 20 for reading the original 12, and a home position provided at a home position Q when copying a non-transparent original. The sensor 28 and the control unit 29 that controls these operations are provided. The control unit 29 is provided in the operation unit 31 of the copying machine 10.

Reference numeral 31 denotes an operation unit which is an operation unit of the copying machine 10. The operation unit 31 includes a transparent original mode display 32 for making a copy of the transparent original 12 and a copy of a normal original. The normal original mode display 33 is provided. An original size push button 35 for designating the original size of the original 12, such as 4 × 4 size, 4 × 6 size, or OHP, is provided above the transparent original mode display 32. When the original size push button 35 is pressed, the pressed original size is displayed on the liquid crystal display plate 36, and the control unit 29 of the movement control means 26 is operated to make the first carriage 20 correspond to the original size. The original 12 is moved to an optimum position indicating a reference position. 37 is a copy start button. When the copy start button 37 is pressed while the transparent original mode display 32 is lit, the control unit 29 causes the first carriage 20 at the optimum position to once return to the home position Q, and then performs a normal scanning movement. There is. The transparent original mode display 32 is designed so that when the back light 15 is mounted above the main body 10A, the mounting switch is turned on and automatically turned on. Further, when the transparent original mode display 32 is turned on, the fluorescent lamp in the long flat plate 22 is turned off. When the backlight 15 is removed from the main body 10A, the normal document mode display 33 is turned on. It is needless to say that the transparent original mode display 32 may be manually pressed and turned on separately from the mounting switch.

Next, the operation will be described. First, when the film original 12 is copied by the copying machine 10, the backlight 15 is attached above the main body 10A. When the mounting switch of the backlight 15 is activated, the normal document mode display 33 goes off, the transparent document mode display 32 lights up, the light source inside the backlight 15 is switched on, and the backlight 15 illuminates through the contact glass 13. Then, the contact glass 13 is irradiated with light from the light source of the backlight 15.

FIG. 2 is a flowchart showing the operation of the control unit 29 of the movement control means 26, which is repeated at a predetermined time. Hereinafter, description will be made with reference to the flowchart shown in FIG. First, in P _1, ON presses the document size pushbutton 35 of the document size 4 × 4 Then, the document size to the liquid crystal panel 36 is displayed, with P _2, size position location is input to the CPU of the control unit 29 , P ₃ , the scanner motor is turned on, the first carriage 20 is guided by the guide rail 19 and moved in the sub-scanning direction B, and it is determined at P ₄ whether the 4 × 4 size positioning sensor 27 has sensed, If NO, the first carriage 20 returns to P ₃ , and further moves in the sub-scanning direction B along the guide rail 19, and the positioning sensor 27 senses at P ₄ , and if YES, the first carriage 20. Moves to the optimum position showing the reference position for placing the original 12 and stops, and at P ₅ , the copy start button 37 changes from red to blue and is turned on. At this time, since the first carriage 20 is stopped at the optimum position of the document 12, it is extremely easy and accurate to set the document 12 at the reference position in accordance with the mark 23 on the cover 21 of the first carriage 20. it can.

Next, when the blue copy start button is pressed, the scanner motor starts rotating at P ₆ , the first carriage 20 starts moving to the home position side, and the first carriage 20 moves at the home position sensor at P ₇ . If it is NO at 28, the process returns to P ₆ if NO, and the scanner motor continues to rotate. When the first carriage 20 comes to 0 position of the home position sensor 28, YES, the at P _8, start the copying operation. The subsequent steps are the same as those for copying plain paper.

That is, since the original 12 is set at the reference position, a clean copy can be obtained. Further, since the first carriage 20 once returns to the home position Q from the optimum position P by the depression of the copy start button 37 and starts copying, the copy operation is the same operation as a normal original, and the operation mechanism and control operation of the normal original are performed. Can be used. Therefore, the copy operation system can obtain the optimum copy of the original 12 without changing it, and the operability for the user can be greatly improved.

[0019]

[Effect of the device]

 As described above, according to the present invention as set forth in claim 1, a portion in which the light amount of the backlight is appropriate and the light in the main scanning direction of the scanner is uniform is obtained, and the transmission type original is set. By indicating the optimum reference position to set with a mark, the user can easily find the optimum reference position to set the original and greatly improve the original setting operation. be able to. According to the second aspect of the present invention, by providing the movement control means for controlling the movement of the running body during the copy operation, the optimum reference position of the transparent film original is indicated, and the non-transparent type is used. The movement control of the running body can be performed as in the case of copying an ordinary document, and the operability of the copy operation system can be greatly improved. According to the third aspect of the present invention, the transparent original mode display is provided on the operation portion, the original size is displayed only by operating the original size push button, and the movement control means is activated to indicate the reference position of the original. The user's operability can be greatly improved.

[Brief description of drawings]

1A and 1B are views showing an embodiment of an image reading apparatus according to claims 1 to 3 of the present invention, wherein FIG. 1A is a perspective view thereof, and FIG.

FIG. 2 is a flowchart showing an operation of the image reading apparatus shown in FIG.

[Explanation of symbols]

 11 Image reading device 12 Original (transmissive original) 13 Contact glass (original plate) 15 Backlight 16 Reading optical system 20 First carriage (traveling body) 21 Cover 23 Mark (reference position) 26 Movement control means 31 Operation unit (operation 32) Transparent original mode display 37 Copy start button P Optimal position Q Home position

Front Page Continuation (72) Inventor Kotaro Yoneaga 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. An image forming apparatus having a backlight for projecting a transmission type original on a platen on an optical system side for reading and a reading optical system for scanning the transmission type original to read image information of the transmission type original. The image reading apparatus according to claim 1, wherein a mark indicating a reference position for mounting the transparent original on the original table is provided on a cover of a traveling body that moves in the scanning direction of the reading optical system. 2. When making a copy of the transparent original, the traveling member moves to an optimum position indicating the reference position on which the transparent original is placed, sets the transparent original at the reference position, and then starts copying. The image reading apparatus according to claim 1, further comprising a movement control unit that performs a scanning movement after the traveling body returns to the home position when the button is pressed. 3. A transparent manuscript mode display for copying the transmissive manuscript is provided in the operation section of the image reading device, and when the manuscript size of the transmissive manuscript is designated, the movement control means is operated and the manuscript size is displayed. The image reading apparatus according to claim 2, wherein: