JPH059071U - Image reader - Google Patents

Abstract

(57) [Abstract] [Purpose] When a handy scanner is attached to an automatic document feeder, a dedicated detection sensor for detecting the device is not required. A reading timing pulse generating mechanism 27 is provided in the handy scanner, and a control unit 51 and a carry motor 14 are provided in an automatic document feeder equipped with the handy scanner. The rotation of the carry motor 14 is transmitted to the read timing pulse generating mechanism 27 via the gear mechanism. The control unit 51 detects the mounting of the handy scanner by the pulse signal from the pulse generation mechanism 27.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a handy device that reads image information on an original by moving relative to the original. An image reading device consisting of a scanner and an automatic document feeder that automatically conveys documents Concerned.

[0002]

[Prior art]

  Conventionally, it is a compact type that allows you to manually read the image information on the original. Although a handy scanner has been put into practical use, this handy scanner automatically An image reading device that can be attached to and detached from an automatic document feeder that automatically conveys is also being developed. . FIG. 4 is an external view showing such an image reading apparatus. Reveal

[0003]   In FIG. 4, the image reading apparatus 1 includes a handy scanner 2 and an automatic document feeder (hereinafter Below ADF) 3. Handy scanner 2 can be attached to and detached from ADF 3 And is locked by the latches 4, 5. ADF3 is about to read The document stacking table 6 for setting the documents to be set and the receiving table 7 for stacking the read documents are attached. Has been. Connect the handy scanner 2 and ADF 3 with the interface cable 8. The ADF 3 is also connected to an upper image processing device (not shown) by the cable 9. Has been done.

[0004]   Next, the internal structure of the image reading apparatus 1 will be described with reference to FIG. Figure 5 is an image It is a schematic structure figure showing the inside of an image reading device.

[0005]   First of all, the inside of the ADF 3 will be described. 0 and 11 are provided. The separation pad 12 is pressed against the lower part of the paper feed roller 11 The attached originals are separated into one sheet. On the right side is Hara A document presence / absence detection sensor 13 for detecting the presence / absence of a draft is attached. Conveyor motor 1 4 rotates the conveying rollers 16, 17, and 18 via the belt 15, and the Let the manuscript be transported. A read timing pulse generation circuit 19 is installed in the ADF 3. It has been burned. Whether the handy scanner 2 is attached to the ADF 3 , ADF 3 detects the sensor 100.

[0006]   The handy scanner 2 has a line image sensor for reading a document in the central portion. The service 20 is provided. The line image sensor 20 mainly includes a light source 21 and a lens 2. 2 and the solid-state image sensor 23. In addition, at the position where it contacts the transport roller 16. A rotatable guide roller 24 is attached, and the guide roller 24 is attached at a position where it comes into contact with the transport roller 18. A rotatable sub roller 25 is attached.

[0007]   In addition to this, the handy scanner 2 has a read timing pulse generation mechanism and a tooth. A vehicle mechanism is provided, which will be described with reference to FIGS. 6 and 7. . 6 is an internal plan view showing the gear mechanism of the handy scanner, and FIG. 7 is a handy scanner. FIG. 4 is an internal front view showing the gear mechanism of the gear.

[0008]   In both figures, the read timing pulse generation mechanism 27 forms a plurality of slits. The slit disc 29 and the slit portion of the slit disc 29 are attached so as to sandwich them. And a photo sensor 30 that has been stored.

[0009]   The gear mechanism 28 includes a drive gear 31 mounted coaxially with the guide roller 24 and an eye gear. It is mounted coaxially with the dollar gear 32, the speed increasing gears 33 and 34, and the slit disk 29. Gear 35. These gears are attached to the support frames 36 and 37, respectively. It is rotatably attached. The gear mechanism 28 uses a slit circle to rotate the guide roller 24. The photo sensor 30 is transmitted to the plate 29 and the read timing pulse generating mechanism 27 , The slit of the rotating slit disk 29 is detected. As a result, the sub-scanning direction ( Set the reading timing in the direction in which the original moves relative to the handy scanner. Obtainable.

[0010]   If only the handy scanner 2 is used for reading, as shown in FIG. LE indicating that the handy scanner 2 is placed on the 40 to indicate that the reading is possible After confirming that the D lamp 41 is lit, the handy scan is performed on the original 40 Align it with the reading line displayed on the case 2 surface of the canner 2. Next read start button Button 42 to lightly press the handy scanner 2 on the original 40. Move in the direction of arrow A. Note that FIG. 8 is an explanation showing an example of using the handy scanner alone. It is a figure. When the handy scanner 2 moves on the document 40, the guide roller shown in FIG. The roller 24 rotates in the direction of the arrow B, and the rotation is caused by the gear mechanism 28. 9 is transmitted.

[0011]   The number of pulses obtained by the reading timing pulse generation mechanism 27 depends on the resolution in the sub-scanning direction. Where D is D, it is desirable that D × n (n is an integer of 1 or more). Therefore , For example, a resolution of 400 lines / inch is required, and the diameter of the guide roller 24 is 1 2, 13 mm, and the number of slits in the slit disk 29 is 24, as shown in FIG. The speed increasing ratio from the drive gear 31 to the gear 35 must be at least 25 times. This speed increasing ratio is obtained by the speed increasing gears 33 and 34.

[0012]   Next, refer to FIG. 5 for the reading operation when the handy scanner 2 is attached to the ADF 3. Briefly explained.

[0013]   In FIG. 5, first, whether the handy scanner 2 is set in the ADF 3 or not To judge. For this determination, a detection sensor (micro switch) provided in the ADF 3 is used. 100) is used. That is, the handy scanner 2 is set in the ADF 3 Then, the lever tip of the detection sensor 100 is pressed by the bottom surface of the handy scanner 2. Then, the mounting of the handy scanner 2 is detected by a detection circuit (not shown).

[0014]   Next, the document 43 set on the document stacking table 6 is rotated by a sheet feeding motor (not shown). The paper is fed in the direction of arrow C by the paper feed rollers 10 and 11 that have received the force. At that time Only the top one is sent by the pad 12. The transport motor 14 is the same as the paper feed motor The original 43 has started to rotate, and the original 43 is conveyed to the conveying roller 16, the guide roller 24, and the conveying roller 16. It is conveyed by the feed roller 17. Note that the paper feed motor is configured so that the leading edge of the document 43 is It stops a little after the timing of reaching LA16. Then, the document 43 is conveyed The image on the original is read by the line image sensor 20 when passing through the laser 17. It The reading timing is the reading in the ADF 3 in synchronization with the rotation of the carry motor 14. From the timing generation circuit 19 via the interface cable 8 shown in FIG. To the image sensor 20. The read image information is converted into an electrical signal, Once stored in a line memory (not shown) in the ADF 3, the interface cable It is sent to a higher-order image processing device (not shown) via the rule 9. In addition, handy scanner 2 When the scanner is mounted on the ADF 3 for reading, the guide roller 24 Because of contact, the gear mechanism 28 and the slit disc 29 also rotate.

[0015]

[Problems to be solved by the device]

  However, in the above conventional device, the handy scanner is attached to the ADF. If you want to read with a dedicated scanner to detect the attachment of the handy scanner to the ADF. It required a detection sensor, leading to an increase in the cost of the device.

[0016]   The present invention has been made in view of the above problems, and its purpose is to provide a hand-held scanner. Use the output of the reading tamming generator inside the scanner to detect the installation of the handy scanner By doing so, it is possible to provide a device that does not require a special detection sensor. It

[0017]

[Means for Solving the Problems]

  In order to solve the above-mentioned problems, the present invention contacts a document and rotates a rotating body to rotate the rotating body. To the reading timing generator to generate the reading timing. The handy scanner that reads the image on the original based on the scanning, and the rotation is transmitted to the rotating body. A handy scanner having a conveying roller that reaches and a driving unit that drives the conveying roller In the image reading device consisting of a detachable automatic document feeder, the drive unit conveys the image. Scan timing generation in the handy scanner generated by driving the roller The output signal of the raw section detects the mounting of the handy scanner in the automatic document feeder. The detection means is provided.

[0018]

[Action]

  When scanning a document, first the drive unit in the automatic document feeder rotates the transport roller. Turn over. The rotation of the transport roller is transmitted to the rotating body inside the handy scanner, and It is transmitted to the reading timing generation unit. From the reading timing generator, An output signal that follows the rotation of the rotor is obtained. The detection means obtains this output signal Detects the attachment of the scanner to the automatic document feeder.

[0019]

【Example】

  Embodiments according to the present invention will be described below with reference to the drawings. It is common to each drawing The same symbols are attached to the elements.

[0020]   1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an embodiment of the present invention. It is a schematic structural diagram.

[0021]   In FIG. 1, a control unit 51 is provided in the ADF and controls the document transport system of the ADF. To do. The control unit 51 includes a read timing generation mechanism 27 in the handy scanner. A document presence / absence detection sensor 13 provided in the ADF is connected. In addition, the control unit 5 1 drives the paper feeding motor 53 via the motor driver 52, and the motor driver 5 The transport roller 14 is driven via the control unit 4. The paper feed motor 53 is a paper feed motor shown in FIG. Rotate la 10, 11. Further, the control unit 51 is connected to the host device 55. .

[0022]   Figure 2 shows the handy scanner mounted on the ADF. Similarly to the conventional example, the slit-shaped disc 29 and the photo sensor 30 are provided in the handy scanner 2. And a read timing pulse generating mechanism 27 including The roller 24 contacts the ADF 56 and the rotation is transmitted.

[0023]   In addition, the ADF 56 has a handy scanner 2 mounting detection sensor, which is seen in the conventional example. Is not provided. The other structure is the same as that of the conventional example.

[0024]   Next, according to the flowchart shown in FIG. 3, reading when the handy scanner is attached The operation will be described. Note that FIG. 3 is a flowchart showing the transport control operation in the embodiment. Is.

[0025]   First, when the handy scanner 2 is attached to the ADF 56, the handy scanner 2 The guide roller 24 is pressed against the transport roller 16 of the ADF 56. Transport by this The rotation of the roller 16 can be transmitted to the guide roller 24. Sheet operator When the original 43 of the original is set on the original loading table 6 of the ADF 56, the original presence detection sensor 1 3 and the control unit 51 is notified (step 1).

[0026]   Here, when a read execution command is issued from the host device 55 shown in FIG. 1 (step 2) , The control unit 51 rotates the carry motor 14 in a certain mode via the motor driver 54. Invert (step 3). This causes the transport rollers 16, 17, 18 to rotate, The guide roller 24 that is in pressure contact with the transport roller 16 also rotates in a certain mode. here The constant mode rotation of the carry motor 14 artificially operates the handy scanner 2 alone. When the guide roller 24 is rotated, it is possible to obtain a mode that is less likely to be in the rotation mode. Is set to For example, 100ms rotation-100ms pause-100ms rotation Repeat such a cycle for several cycles.

[0027]   When the guide roller 24 rotates, the slit disk 29 rotates via the gear mechanism 28. The photo sensor 30 detects the slit of the slit disk 29 in association with this rotation. , A pulse signal is obtained. This pulse signal is sent to the control unit 51. Control unit 51 The handy scanner 2 is attached to the ADF 56 by detecting this pulse signal. It is determined that it has been done (step 4). If no pulse signal is detected here, control The unit 51 determines that the handy scanner 2 is not attached and To send an alarm signal (step 5).

[0028]   When it is determined that the handy scanner 2 is attached, the control unit 51 next The paper feed motor 53 is rotated via the data driver 52 and the motor driver 5 The transport roller 14 is rotated via 4 (step 6). This makes the original 43 The paper is unwound from the stacking table 6 and conveyed to the reading position, that is, to the bottom of the image sensor 20. Then, the image is read.

[0029]   When the reading of the first document 43 is completed, the control unit 51 causes the document presence detection sensor 1 Confirm that there is the second original 43 by step 3 (step 7), and return to step 3. Then, the operation for confirming the mounting state of the handy scanner 2 is performed again. Like this, Hara It is the handicap to check the mounting state of the handy scanner 2 every time one manuscript 43 is read. The scanner 2 can be easily attached to and detached from the ADF 56, so that a plurality of originals 43 can be combined. The handy scanner 2 may be removed even during continuous scanning. In consideration.

[0030]   In addition, the rotation transmission route from the transport motor 14 to the slit disc 29 is provided with a gear. Since there is a backlash, the rotation of the carry motor 14 and the generation of the pulse signal It is difficult to obtain perfect synchronization between the two. Therefore, the rotation of the carry motor 14 The tracking performance of the pulse signal does not have to be strict. Yes. In the present embodiment, when confirming the mounting of the handy scanner 2, the conveyance motor 14 is turned on. When the handy scanner 2 is operated independently, it rotates in a certain mode. It can be distinguished from the rotation mode of, and erroneous recognition can be prevented.

[0031]

[Effect of device]

  As described in detail above, according to the present invention, the handy scanner is attached to the ADF. The pulse signal that follows the rotation of the carry motor is read to determine whether or not It is possible to judge whether or not it is coming out of the A dedicated sensor for detecting is unnecessary, which can contribute to cost reduction of the device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment according to the present invention.

FIG. 2 is a schematic structural diagram showing an embodiment according to the present invention.

FIG. 3 is a flowchart showing a transport control operation of the embodiment.

FIG. 4 is an external view showing an image reading device.

FIG. 5 is a schematic structural diagram showing the inside of the image reading apparatus.

FIG. 6 is an internal plan view showing a gear mechanism of a handy scanner.

FIG. 7 is an internal front view showing a gear mechanism of a handy scanner.

FIG. 8 is an explanatory diagram showing an example of using the handy scanner alone.

[Explanation of symbols]

2 Handy Scanner 16 Conveying Roller 24 Guide Roller 27 Reading Timing Pulse Generation Mechanism 51 Control Unit 56 Automatic Document Conveying Device

Continued front page    (72) Creator Naoki Sunaga             1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric             Industry Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A handy scanner for rotating an rotator in contact with an original, transmitting the rotation to a reading timing generator to generate a reading timing, and reading an image on the original based on the reading timing; An image reading apparatus comprising an automatic document feeder having a carrying roller for transmitting rotation to a body and a driving unit for driving the carrying roller, to which a handy scanner is attachable / detachable, wherein the driving unit drives the carrying roller. An image reading apparatus comprising: a detection unit that detects whether the handy scanner is mounted on an automatic document feeder based on a generated output signal of a reading timing generation unit in the handy scanner. 2. The image reading apparatus according to claim 1, wherein the drive unit rotates the transport roller in a predetermined mode.