JPS61274568A - Information reader - Google Patents

Abstract

PURPOSE:To perform the reading control in the subscanning direction by providing a reading control signal generating means at a scanner part or an original feed part in response to the distance shifted relatively in the subscanning direction of an original and reading the picture signals according to the control signal. CONSTITUTION:A scanner part 1 is fixed at an original feed part 2, and an original 4 on which the picture information recorded is held between a paper feed roll 12 and a drive roll 5 as well as between upper and lower guide rolls 15a and 15b respectively. The roll 12 is driven by a drive motor 14 via a timing belt 13 and the original 4 is carried in the subcarrying direction A. In this case, the surface of the original 4 is irradiated by an illumination lamp 11 and this reflected light forms an image on a solid state image pickup element 9 through an image forming lens 10. A reading control signal generating means 6 provided to the roll 5 produces the main scan control signal in response to the distance shifted in the direction A. Then the electric charge stored in the element 9 is read out based on said main scan control signal to read the original 4. Thus the reading control is possible in the subscanning direction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an information reading device for reading image information in an arbitrary area.

Conventional technology Conventionally, this type of information reading device is a simple type.

A handy scanner was fixed to a document transport table using a removable holder, and the document was transported in the sub-scanning direction by a document transport means provided on the document transport table to read information (Japanese Patent Application Laid-Open No. 56-4879 issue).

Problems to be Solved by the Invention In such conventional information reading devices, the conveyance roller is provided at a predetermined angle with respect to the reference plane in order to convey the document while aligning it with the reference plane in the sub-scanning direction. Ori,
It has been difficult to perform reading control by detecting the relative movement amount in the sub-scanning direction between the handy scanner and the document.

The present invention has been made in view of these points, and an object of the present invention is to provide an information reading device that has a simple configuration and is capable of controlling reading in the sub-scanning direction.

Means for Solving the Problems The information reading device of the present invention includes a solid-state image pickup device that reads image information of a document and converts it into an image signal, a light source that illuminates the document, and a light source that contacts the surface of the document and converts it into an image signal. a traveling roller that rotates by relative movement in the sub-scanning direction of the scanner unit, and a connecting member rotatable in the sub-scanning direction at the front or rear end of the document in the sub-scanning direction with respect to the scanner unit. The document conveying section is arranged in series through the document conveying section, and the document conveying section is relatively rotated in the sub-scanning direction of the document, and when the scanner section is placed on the document conveying section, the paper feeding section comes into contact with the traveling roller. Laura and
a drive motor that drives the paper feed roller, and a means for generating a reading control signal corresponding to the distance of movement of the document in the sub-scanning direction relative to the scanner section or the document transport section. and an image signal is read out from the solid-state image sensor based on the read control signal.

Function According to this configuration, the scanner section and the document transport section are rotatably connected in the sub-scanning direction, so that it is possible to perform fixed document reading, in which the document is fixed and the device moves on its own to read and scan, and vice versa. Reading and scanning can be performed using either of two methods: reading, scanning, and document conveyance/reading.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show a first embodiment of the present invention, FIG. 1 is a perspective view of the information reading device, FIG. 2 is a side view when the document is conveyed and read, and FIG. 3 is when the document is fixed and read. FIG. 4 is a block diagram of the read control circuit. 1 is a scanner section, 2 is a document transport section, 3 is a connecting arm, which connects the scanner section 1 and document transport section 2 rotatably in the sub-scanning direction A; 64 is a document on which image information is recorded; Reference numeral 5 denotes a running roller that is in contact with the document surface and rotates as the document 4 moves; 6 is a reading control signal generating means that is located near the running roller 5 and generates a signal corresponding to the moving distance of the document 4; It consists of a plate 7 and a detection element 8. 9 is a solid-state image sensor, and document 4
The image information recorded on the image information is condensed and imaged by the imaging lens 10 and read. Reference numeral 11 denotes an illumination lamp such as a fluorescent lamp that illuminates the original 4 at a brightness suitable for reading by the solid-state image sensor 9; 12, the original 4 is conveyed and driven in the sub-scanning direction A by a drive motor 14 via a timing belt 13; Paper feed rollers 15a and 15b are upper guide rollers and lower guide rollers 16a and 16b that respectively guide the conveyance of the document 4.
Reference numerals denote an upper opening member and a lower opening member which integrally fix the scanner section 1 and the document conveying section 2 so that they face the document surface during self-propelled reading (in the case of FIG. 3).

With this configuration, when the document is conveyed and read, the second
As shown in the figure, the scanner unit 1 is placed and fixed on the document transport unit 2, and the document 4 on which one image information is recorded is transferred to the paper feed roller 1.
The document 4 is sandwiched between the document 2 and the running roller 5, the upper guide roller 15a and the lower guide roller 15b, respectively, and the drive motor 14 drives the paper feed roller 12 via the timing belt 13 to convey the document 4 in the sub-conveyance direction A. ing. During this conveyance, the surface of the document 4 is illuminated by the illumination lamp 11, and the image information recorded on the document surface becomes reflected light, which is condensed and reduced by the imaging lens 10, and a photoelectric conversion element such as a COD is aligned in a line. The images are formed on the solid-state image sensing devices 9 that are lined up.

The reflected light incident on the solid-state image sensor 9 is photoelectrically converted and charges are accumulated according to the intensity of the light, and the read control signal generating means 6 provided on the running roller 5 generates a signal corresponding to the moving distance in the sub-scanning direction A. Reading is performed by sequentially reading out the charges accumulated in the solid-state image sensor 9 based on a main scanning control signal generated by the operator. By simply inserting the document into the scanner, the document 4 is automatically transported and read and scanned.

Next, when reading a document in a fixed position, as shown in FIG.
Place it on top. In this way, the scanner section 1 and the document transport section 2
In the opened state, the scanner section 1 and the document transport section 2 are fixed together by the upper opening locking member L6a and the lower opening opening member 16b, and when the paper feed roller 12 is driven, the upper opening of the original 4 is fixed. Image information recorded on the document 4 by self-traversing in the sub-scanning direction A is performed in the same manner as in the case of FIG.

The operator simply places the information reading device on the document 4, and the information reading device automatically runs over the document to perform reading and scanning.

FIG. 5 shows the main part of a second embodiment in which the drive motor 14 is a synchronous motor. Since the configuration of the information reading device in the second embodiment is basically the same as that in the first embodiment described above, a detailed explanation will be omitted, and the reading control operation of the solid-state image sensor 9, which is a feature of this embodiment, will be explained. In FIG. 5, 17 is a motor drive circuit that drives and controls the drive motor 14. In FIG. The document 4 is read by the solid-state image pickup device 9 as reflected light from the illumination lamp 11, and a signal for controlling the readout of the accumulated charge according to the intensity of the light is controlled using a drive signal from the motor drive circuit 17. Ru. This eliminates the need for the read control signal generating means 6 that controlled the readout of the solid-state image sensor 9 in the first embodiment, and the apparatus can be simplified. Furthermore, the information reading device in the second embodiment has a drive motor 14
Since a synchronous motor is used as a synchronous motor, even when self-propelled scanning is stopped during fixed reading of a yK document and the operator manually scans and reads the document 4, the synchronous motor does not control the rotation of the paper feed roller 12. A self-excitation signal is generated by rotating via a timing belt. Since the self-excitation signal is a signal having the same period as the drive signal of the motor drive circuit 17, the readout of the solid-state image sensor 9 can be controlled using this signal.

As described in the detailed description of the invention, the information reading device of the present invention can read image information using either of the two methods of fixed original reading and original conveyance reading, and has the following effects.

In the present invention, even when the sub-scanning speed fluctuates, the sub-scanning of the original is controlled by the means for generating a reading control signal corresponding to the moving distance of the original in the scanner section or the document transporting section as the document moves relative to the sub-scanning direction. In order to perform main scanning control corresponding to the distance, if the processing time of the read image information in various externally connected information processing devices becomes longer than the reading time, the drive motor is controlled to move the document in the sub-scanning direction. At the same time as the conveyance is stopped, the reading of the solid-state image sensor is also stopped, and when the processing of one image information is completed, the conveyance of the original is started again, and the reading is resumed, so that the image information recorded on the original can be read faithfully without interruption. , and its practical effects are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of the first embodiment of the information reading device of the present invention, FIG. 2 is a side view of the document conveying and reading state, FIG. 3 is a side view of the document being fixed and being read, and FIG. 4 is a reading control Circuit Block Diagram FIG. 5 is a block diagram of a reading circuit of an information reading device according to a second embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Scanner part, 2...Document transport part, 3...Connection arm, 5...Traveling roller, 6...Reading control signal generation means, 9...Solid-state image sensor, 12...・Paper feed roller, 14... Drive motor, 17... Motor drive circuit, A... Sub-conveyance direction

Claims (1)

[Claims] 1. A solid-state image sensor that reads image information of a document and converts it into an image signal, a light source that illuminates the document, and a light source that contacts the surface of the document and moves relative to the document in the sub-scanning direction. A rotating running roller is provided in the scanner section, and a document transport section is connected to the scanner section at the front or rear end of the document in the sub-scanning direction via a connecting member rotatable in the sub-scanning direction. and a paper feed roller that rotates the document transport section relatively in the sub-scanning direction of the document and contacts the traveling roller when the scanner section is placed on the document transport section, and the paper feed roller. The scanner section or the document transport section is provided with means for generating a read control signal corresponding to the moving distance of the document as it moves relative to the sub-scanning direction, and the read control signal is An information reading device configured to read an image signal from the solid-state image sensor based on. 2. The information reading device according to claim 1, wherein the drive motor is a synchronous motor, and the read control signal is generated by a self-excitation output of the drive motor.