JPH06186647A - Traveling body driving device - Google Patents

Abstract

PURPOSE:To provide a traveling body driving device which facilitates the fitting of an original by preventing an original platen from being moved at the attaching and detaching time of the transmitted original and which can be miniaturized by reducing the number of parts. CONSTITUTION:In the traveling body driving device which is provided with light sources and the original platens individually reading the reflected original and the transmitted original and a first and a second traveling bodies installed on the reading side of the reflected original, where the original platen for reading the transmitted original is successively provided on either the first or the second traveling body 8, and which reads the reflected original by driving the first and the second traveling bodies 8 at a reflection mode time and reads the transmitted original by driving the original platen for reading the transmitted original by setting one of the first and the second traveling bodies 8 as a main driving side as the transmission mode time, a member for locking 38 is formed on either the traveling bodies 8 or a main body 46. Besides, a traveling body lock device 37 which is provided with a lock part 40 engaged with the member for locking 38 and a tapered part 41 adjacent to the lock part 40 and which locks the traveling body 8 at the attaching and detaching time of the transmitted original is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving body driving apparatus in an image reading apparatus capable of reading a reflective original document and a transparent original document such as a film.

[0002]

2. Description of the Related Art An example of a conventional traveling body drive system will be described with reference to FIG. FIG. 14 shows an example of the image reading apparatus (the configuration of the apparatus has been filed by the applicant). A reflective original 2 is placed on the surface of a contact glass 1 as an original table. Contact glass 1
A light source 3 for illuminating the reflection original 2 and reflection mirrors 4, 5 and 6 forming a reflection reading optical system are arranged below. The reflection mirror 4 is placed on the first traveling body 7, and the reflection mirrors 5 and 6 are placed on the second traveling body 8. Also,
On the optical path of the light reflected by the reflection mirror 6, an imaging lens 9 for reading a reflection original, an optical path switching mirror 10 having a reflection surface rotatably supported by a fulcrum P, and a photoelectric conversion element 11 ( For example, a CCD sensor) is provided.
In this way, the reflection original reading optical system A is provided in the main body 12.
Is provided.

On the other hand, in the left side area of the main body 12, a transparent original 14 is placed on the surface of the contact glass 13 as an original table. This contact glass 13
It is connected to the second traveling body 8. Above the contact glass 13, a light source 1 for illuminating the transparent original 14 is provided.
5, a reflecting plate 16 and a diffusing plate 1 for guiding light to the document surface.
7 and 7 are arranged. A reflection mirror 18 is placed below the contact glass 13, and an imaging lens 19 for reading a transparent original and a reflection mirror 20 are arranged on the optical path of the light reflected by the reflection mirror 18. The optical path switching mirror 10 is located at point R when reading the transparent original 14, and at point Q when reading the reflective original 2. In this way, the transparent original reading optical system B is arranged in the main body.

In such a structure, first, the case of reading the reflective original 2 will be described. When reading the reflective original 2, the first traveling body 7 having the light source 3 and the reflective mirror 4 mounted thereon
And the second traveling body 8 equipped with the reflection mirrors 5 and 6,
By moving the reflective original 2 at a speed ratio of 2: 1, the entire surface of the reflective original 2 is read. The light thus read is reflected by the reflecting mirrors 4, 5, 6 and then imaged by the imaging lens 9 and detected by the photoelectric conversion element 11, and the main body 12 is based on the detected signal. Image processing is performed by an image processing unit (not shown).

On the other hand, the case of reading the transparent original 14 will be described. At the time of reading the transparent original 14, the light from the light source 15 is reflected by the reflecting plate 16 and diffused by the diffusing plate 17, so that the surface of the contact glass 13 is uniformly illuminated. In such a state, the transparent original 1
4 and the contact glass 13 move in the X direction (sub-scanning direction) with the second traveling body 8 as the main drive side, thereby reading the entire surface of the transparent original 14. The read optical signal is reflected by the reflecting mirror 18, and the imaging lens 19
After being imaged by, the light is sequentially reflected by the reflection mirror 20 and the optical path switching mirror 10 and detected by the photoelectric conversion element 11. Based on the detected signal, an image processing unit (not shown) in the main body 12 performs image processing. Done.

As described above, the transparent original 1 such as a film.
The document table (contact glass 13) for reading 4
The second traveling body 8 (or the first traveling body 8 for reading the reflection original 2)
By installing it on the traveling body 7), the sub-scanning traveling system for the reflective original reading system and the transparent original reading system can be made common, whereby the image reading apparatus can be downsized and the cost can be reduced. .

In addition to such a specific example, an example of a known traveling body drive device is disclosed in Japanese Patent Application Laid-Open No. 3-23435 filed by the present applicant under the name of "traveling body drive device". There is something. This is to wire a wire around one side or both sides of the first and second traveling bodies that move in the same direction at a speed of 1: 1/2, and to drive one of the first and second traveling bodies. It is driven using a linear motor, and the other traveling body is driven by the action of the wire and the moving pulley. By controlling the drive in this way, the gear +
Compared with the previous drive control method that linearly converts the power of the rotary motor by a wire-type rotary-linear conversion system to drive the traveling body, vibrations due to the transmission and conversion systems do not occur, resulting in higher accuracy. It becomes possible to perform drive control.

[0008]

In the traveling body driving apparatus as described above, a linear motor is used to realize highly accurate driving, but on the other hand, a linear motor of this type uses a gear or the like. The disadvantage is that it cannot continue to stop in the presence of disturbances. That is, in an image reading apparatus using a linear motor, the first traveling body and the second traveling body may move during conveyance or the like that does not operate, and in some cases, mechanical components may be damaged by impact during movement. There is also.

In general, a transparent original such as a film needs to be read at a higher density than a reflective original. Therefore, in a device that reads a reflective original and a transparent original by one unit, the drive control of the traveling body driving device of the sub-scanning traveling system during reading the transparent original is more accurate than that during reading the reflective original. It is necessary to become. When a reflective original or a transparent original is read by a single device as described above, the sub-scanning method for reading the transparent original is generally a method of driving the original table. Therefore, the transparent original is set. In this case, it is desirable to fix the platen. However, since the linear motor is used as the sub-scanning traveling system, the original table cannot be fixed when the transparent original is attached or detached in this state.

[0010]

According to a first aspect of the present invention, a light source and an original table for reading a reflective original, a light source and an original table for reading a transparent original, and a first and a first installed on the reading side of the reflective original. A second traveling body, and the original plate for reading the transparent original is continuously provided to either one of the first or second traveling bodies, and the first and second traveling bodies are connected in the reflection mode. The reflective original is driven to read the transparent original, and in the transparent mode, the transparent original is read by driving the original table for reading the transparent original with one of the first and second traveling bodies as a main drive side. In the traveling body drive device for reading, a locking member is formed on one of the traveling body and the main body, and the locking member is fitted to the locking member, and the taper portion is adjacent to the locking portion. Place transparent document Sometimes it provided traveling body locking device for locking the traveling body.

According to a second aspect of the present invention, in the first aspect of the present invention, a traveling body stop position control means for stopping the driving of the traveling body is provided before the locking member reaches the apex position of the tapered portion. .

According to a third aspect of the present invention, in the first aspect of the present invention, the drive current of the traveling body is monitored, and when the value exceeds a predetermined value, the traveling body is stopped. A stop position control means is provided.

According to a fourth aspect of the invention, in the first aspect of the invention, the traveling body is stopped at a non-contact position immediately before the locking member reaches the apex position of the tapered portion, and then a predetermined pattern is set. Therefore, a traveling body stop position control means for driving the traveling body by increasing or decreasing the traveling body drive current is provided.

According to a fifth aspect of the present invention, in the second, third or fourth aspect of the present invention, the lock portion of the traveling body lock device includes a first lock portion when the transparent original is attached and detached, and a first lock portion when the image reading device is conveyed. It is composed of two stages with two lock parts.

According to a sixth aspect of the invention, in the fifth aspect of the invention, a convex partition is formed between the two stages of the first lock portion and the second lock portion.

[0016]

According to the first aspect of the invention, since the traveling member is locked when the transparent original is attached or detached, the phenomenon that the original table is moved when the transparent original is attached or detached is eliminated, and the work of attaching and detaching the transparent original is facilitated. It becomes possible.

According to the second aspect of the invention, since the driving of the traveling body is stopped by the traveling body stop position control means before the traveling body reaches the apex position of the taper portion, the traveling body suddenly collides with the lock portion and is damaged. It is possible to prevent this.

According to the third aspect of the invention, since the drive current of the traveling body is controlled by the traveling body stop position control means, it is possible to prevent the traveling body from suddenly colliding with the lock portion and being damaged. In addition, the sensor for detecting the stop position of the traveling body is not required, and the cost of the traveling body drive device can be reduced.

According to the fourth aspect of the present invention, the driving member driving current of the traveling member is increased or decreased by the traveling member stop position control means to temporarily stop the locking member in a non-contact state, and thereafter, the locking member is tapered. Since it is possible to get over the vehicle and reach the lock portion, it is possible to completely prevent the traveling body from suddenly colliding with the lock portion and being damaged.

According to the fifth aspect of the present invention, since the lock portion has a two-stage structure, it can serve as both the traveling body locking device when the transparent original is attached and detached and the traveling body locking device when the image reading device is conveyed. It is possible to reduce the cost of the reading device.

According to the sixth aspect of the present invention, by providing the convex partition portion, the traveling member locking device and the image reading device at the time of attaching / detaching the transparent original without fixing the member having the lock portion with a screw or the like. It is possible to serve also as a traveling body locking device during transportation.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention described in claim 1 will be described with reference to FIGS. 1, 15 and 16. Since the overall configuration of the image reading apparatus has been described in the related art (see FIG. 14), the description of the same parts will be omitted and the same reference numerals will be used for the same parts.

First, before entering the description of the structure of the main part of the present invention, the structure of a traveling body drive system for driving and controlling the first traveling body 7 and the second traveling body 8 using a linear motor is shown in FIGS. It will be described based on 16. First, the first guide shaft 21 and the second guide shaft 22 are arranged in parallel with each other on both sides of the first traveling body 7. This first traveling body 7 is
Two bearing portions 7a and 7b are fitted on the guide shaft 21 side, and one bearing portion 7c is fitted on the second guide shaft 22 side. In addition, the second traveling body 8 includes the first guide shaft 21.
On the side, two bearing portions 8a and 8b are fitted, and on the second guide shaft 22 side, two bearing portions 8c and 8d are fitted.

Dynamic pulleys 27 and 28 are provided outside the first guide shaft 21 of the second traveling body 8. A first belt 24 is stretched between the moving pulleys 27 and 28.
Similarly, on the outside of the second guide shaft 22 of the second traveling body 8,
Moving pulleys 29, 30 are provided. The second belt 26 is stretched between the moving pulleys 29 and 30. First
The first traveling body clamps 23 and 25 are provided at both left and right ends of the traveling body 7.
Is provided, and the first traveling body clamp 23 is connected to the first belt 24.
And the first traveling body clamp 25 clamps the second belt 2
6 is clamped.

16 (a) and 16 (b) show the side surface shape of the first belt 24 side. In this case, FIG. 16 (a)
Indicates the state at the reading scanning start position, and the first belt 24
Is fixed to the belt ends 31a and 31b at both ends thereof and is wound around the moving pulleys 27 and 28 by half a turn. From this state, when the second traveling body 8 on which the contact glass 13 on which the transparent original 14 is placed is driven in the sub-scanning direction by the direct drive in the Xa direction, the first belt 24 and two moving pulleys are moved. Due to the operation of 27 and 28 (at the same time, the second belt 26 and the two moving pulleys 29 and 30 as shown in FIG. 15 also operate), the first traveling body 7 becomes twice as large as the second traveling body 8. The reading operation is performed by moving at a speed. Then, when the reading scan ends, the first belt 24 and the two moving pulleys 27 and 28 stop at the reading scan end position as shown in FIG. 16B. As a result, the moving pulley 27 moves from the position a ₁ in FIG. 16A to the position a ₂ in FIG. 16B, and the moving pulley 28 moves from the position b ₁ in FIG. b) in b)
You have moved to position ₂ . The belt end 3
The positions of 1a and 31b do not change before and after the reading scan.

A movable back yoke 33 and a drive coil 34 are attached below the second traveling body 8, and a linear shape in which the SN poles are alternately arranged with a constant gap maintained between the movable back yoke 33 and the drive coil 34. Magnet 35 is arranged. A fixed back yoke (not shown) is provided below the magnet 35. The movable back yoke 33, the driving coil 34, the magnet 35, and the fixed back yoke constitute a multi-pole linear DC motor 36. Accordingly, when a current is passed through the drive coil 34 by the drive control circuit (not shown), the second traveling body 8 can be driven in the sub-scanning direction by the direct drive in the X direction.

As the linear motor, in addition to the linear DC motor 36 as described above, a single pole voice coil type linear DC motor or linear pulse motor may be used.
In addition, the four bearing portions 7a, which are fitted to the first guide shaft 21,
As 7b, 8a and 8b, for example, a sliding bearing in which a round bar and a round hole are combined, or a rolling bearing and a pressing member may be combined.

Next, the structure of the main part of the present invention is shown in FIG.
Description will be made based on (c). The light source 3 for reading the reflective original 2 and the contact glass 1 as the original table, the light source 15 for reading the transparent original 14 and the contact glass 13 as the original table, and the first and second runs installed on the reading side of the reflective original 2. Bodies 7, 8, and the contact glass 13 for reading the transparent original is provided on the first or second traveling body 7,
8, the first and second traveling bodies 7 and 8 are driven to read the reflective original 2 in the reflection mode, and the first or second traveling body 7 and 8 are read in the transmission mode.
In the traveling member driving device as shown in FIG. 13, the transparent glass 14 is read by driving the contact glass 13 for reading the transparent original with one of the traveling bodies 8 as the main drive side. A traveling body lock device 37 is provided for locking the traveling body when it is attached to or detached from the 13th surface.

FIG. 1A shows the traveling body locking device 37.
It shows the configuration of. In this case, a lock pin 38 as a locking member is formed on the second traveling body 8. On the other hand, a lock portion 40 is formed at a position where the lock plate member 39 of the traveling body lock device 37 is fitted with the lock pin 38, and a taper portion 41 is formed adjacent to the lock portion 40. A long hole 42 is formed in the lock plate 39, and one end of a solenoid movable iron core support member 43 is fitted in the long hole 42. The other end of the solenoid movable iron core support member 43 is connected to the solenoid movable iron core 45, and the solenoid movable iron core 45 is rotatably attached to the solenoid movable iron core support member 43. The solenoid fixed iron core 44 is fixed to the device main body 46,
The solenoid movable iron core 45 is pulled downward when the power of the solenoid is turned on. The lock plate member 39 is rotatably supported by the device body 46 by a rotation support member 47. Accordingly, when the lock plate member 39 rotates, the solenoid movable iron core 45 rotatably attached to the solenoid movable iron core support member 43 can be moved up and down in accordance with the movement.

Further, one end of the elastic supporting member 48 is connected to the tip of the lock plate member 39, and the other end is connected to the main body 46 of the apparatus.
It is fixed to the side. The elastic constant of the elastic support member 48 is set to a value that gives a moment for keeping the lock plate member 39 substantially horizontal when the power of the solenoid is turned off.
The position of the lock portion 40 of the lock plate member 39 is set to the transparent document attachment position.

The operation of the traveling body lock device 37 having such a structure will be described. First, as shown in FIG. 1A, when reading the reflective original 2 or the transparent original 14,
Also, when the traveling bodies (the first traveling body 7 and the second traveling body 8) return, the lock plate member 39 is installed while being maintained in a substantially horizontal state by the action of the elastic support member 48.
Next, the second traveling body 8 returns, and as shown in FIG. 1B, the lock pin 38 moves the taper portion 41 of the lock plate member 39.
Then, the lock plate member 39 is pushed down by the driving force of the second traveling body 8. Then, as shown in FIG. 1C, the lock pin 38 completely rides over the tapered portion 41 of the lock plate material 39 and fits into the lock portion 40. Since the vehicle cannot proceed to the left from the position of the lock portion 40, the driving of the second traveling body 8 is stopped at this position, and the locking of the second traveling body 8 is completed. In this locked state, the second
Since the moving body 8 cannot move, the transparent original 14 can be easily attached and detached on the surface of the contact glass 13.

When the transparent original 14 is read after the transparent original 14 is attached / detached, the power source of the solenoid is turned on, and the force of the solenoid movable iron core 45 causes the lock plate 39 through the solenoid movable iron core support member 43. Is pulled downward, the lock pin 38 is temporarily released from the lock portion 40, the second traveling body 8 is driven, the lock pin 38 passes through the taper portion 41, and then the power of the solenoid is turned off.

As described above, when the transparent original 14 is attached to or detached from the surface of the contact glass 13, the second traveling body 8 is locked by the traveling body locking device 37, so that the transparent original 14 can be attached smoothly. It can be performed, which can improve work efficiency.

Next, an embodiment of the invention described in claim 2 will be described. The description of the same parts as those in the first aspect of the present invention will be omitted, and the same reference numerals will be used for the same parts.

In the invention according to claim 1 described above, the lock pin 38 attached to the second traveling body 8 rides over the taper portion 41 of the lock plate 39 and abuts on the lock portion 40, and then the second traveling body 8 is driven. Since the vehicle is stopped, an impact is generated at the time of a collision, which may damage the plate material and the traveling member.

Therefore, in this embodiment, before the lock pin 38 reaches the apex position P of the taper portion 41, a traveling body stop position control means (not shown) for stopping the driving of the second traveling body 8 is provided. is there. FIG. 1B corresponds to a position where the driving of the second traveling body 8 is stopped. Even if the driving of the second traveling body 8 is stopped at the slope position of the taper portion 41, the second traveling body 8 has an inertial force to overcome the taper portion 41, so that the slope can be overcome without any problem. . In this case, since the inertial force is used up to get over the remaining slope, the second traveling body 8 stops immediately after getting over the tapered portion 41. As a result, the lock pin 38 does not abut the lock portion 40 of the lock plate member 39, so that it is possible to prevent the traveling body or the like from being damaged by the impact of the collision. In addition, if a suitable stop position of the traveling body is obtained by calculation or experiment and a photo interrupter or the like for a stop command command is installed at that position,
The stop command at the obtained position can be easily realized. here,
The stop command is realized by cutting off the drive voltage to the motor.

As described above, since the drive of the second traveling body 8 can be stopped before the second traveling body 8 reaches the apex position of the taper portion 41 by the traveling body stop position control means, the second traveling body 8 is locked by the lock portion. It is possible to prevent a sudden collision with 40 and damage.

Next, an embodiment of the invention described in claim 3 will be described with reference to FIGS. The description of the same parts as those in the first and second aspects of the present invention is omitted, and the same parts are designated by the same reference numerals.

Here, the drive current of the second traveling body 8 is monitored, and when the value exceeds a predetermined value, the second current is monitored.
A traveling body stop position control means for stopping the driving of the traveling body 8 is provided. FIG. 2 shows the structure of a speed control device including the traveling body stop position control means. The microcomputer 49 is a microprocessor 49a.
The read-on memory 49b (ROM) and the random access memory 49c (RAM) are connected via a bus 50. A command generator 52 that outputs a status command signal that commands the status of the linear motor 51 and an incremental encoder 53 are also provided on the bus 50.
Is connected to a state detection interface device 54 for processing the output of the above and converting it into a digital numerical value. The state detection interface device 54 includes a counter (not shown) that counts the output pulse of the incremental encoder 53. The output value from the bus 50 is sent to the driving interface device 55 and then converted into a pulse signal (control signal) for operating the power semiconductor (transistor) that constitutes the driving device 56. As a result, the drive device 56 operates based on the pulsed signal, controls the voltage applied to the linear motor 51, and drives the linear motor 51 at a desired speed. The speed of the linear motor 51 is detected by the incremental encoder 53 and the state detecting interface device 54, and is taken into the microcomputer 49. The second traveling body 8 having the lock pin 38 is connected to the linear motor 51. The configuration of FIG. 2 as described above is an example using a discrete type microcomputer, but the command generation device 52, the drive interface device 55, and the state detection interface device 54 are integrated into one chip. The same function can be obtained by using a computer.

Next, the processing method of the state detecting interface device 54 for processing the output of the incremental encoder 53 will be described. The state detecting interface device 54 is connected to the output of the incremental encoder 53 to the interrupt of the microprocessor 49a and includes a counter (not shown) for counting the reference clock (CLK). Therefore, the state immediately before the edge 57 of FIG. 3 arrives will now be described. OBs in FIGS. 3A and 3B are output pulses of the incremental encoder 53, and FIG.
CLK in (c) is a state detection interface device 54.
Is the reference clock of. The counter counts the cycle of the OB pulse based on the CLK signal (for example, 0
FFFFH) to perform decrement count. When the edge 57 reaches the interrupt of the microprocessor 49a, the interrupt routine of FIG. 4 is started to be executed.

Here, the interrupt routine will be described based on the flow of FIG. The decrement count value of the counter is latched in the storage register built in the state detecting interface device 54. Next, the latched decrement count value is stored in the random access memory 49c.
Store to. The initial count number (0FFFFH) for counting the pulse period of Tn is given, the decrement count is started again, and the interrupt processing is ended. Then, when the edge 58 as shown in FIG. 3C reaches the interrupt again, the interrupt processing of FIG. 4 is repeated. In this case, the speed ω (k) can be obtained as follows.

Ω (k) = k / (Tclk × Ne × n) Tclk: CLK cycle Ne: Incremental encoder division number per unit length n: CLK count number = 0FFFFH-decrement count number k: Unit conversion to speed Constant Next, the control system (including the traveling body stop position control means) of the traveling body drive device will be described with reference to FIG. The speed v (i−1) of the linear motor 51 detected by the incremental encoder 53 of FIG.
Is given to the calculation unit 60 via. In the calculation unit 60, the control target value R output from the command generator 52 is output.
The difference e (i) from (i) is calculated. This difference e (i) is integrated in block 61, and in block 62 the integration constant Ki
Is multiplied and sent to the calculation unit 63. At the same time, the difference e (i) is multiplied by the proportional constant Kp in the block 64 and sent to the calculation unit 63. Then, the computing unit 63 adds these two inputs to obtain the control voltage value V (i).
Here, the control voltage value V (i) is sent to the control voltage determination unit 65, 0 V is output when it is determined to be stopped, and the control voltage is output to the linear motor 51 at other times, whereby the linear motor 51 is output. Can be driven.

Here, the control voltage determining unit 65 will be described based on the control flow of FIG. First, the limit value Vlim of the control voltage set in the read-on memory 49b or the random access memory 49c of FIG. 2 is substituted into the variable Vo. Next, the control voltage value V (i) obtained by the calculation unit 63
And Vo, and if V (i) is greater than or equal to Vo, the control voltage value V (i) is set to 0, and V (i) is V
If it is smaller than o, the control voltage value V (i) is left unchanged, and the control voltage value V (i) thus obtained is output to the linear motor 51. In this case, when the lock pin 38 shown in FIG. 1B goes over the taper portion 41, the load applied to the linear motor 51 is much larger than that during normal driving, and the speed of the linear motor 51 is reduced by that amount. The unit tries to maintain a constant speed by increasing the control voltage. Therefore, the limit value Vlim of the control voltage is shown in FIG.
If the value of the state shown in (b) is set, the control voltage determination unit 65 determines that V (i) is smaller than Vo during normal driving, and normal drive control is performed. And
The linear motor 51 returns after the reading is completed, and FIG.
When the state of (b) is reached, the drive of the linear motor 51 is stopped. After that, the lock pin 38
Overcomes the taper portion 41 of the lock plate material 39 by the inertia force,
Immediately after getting over this, the traveling body stops.

As described above, by providing the traveling body stop position control means and controlling the drive current of the second traveling body 8, the second traveling body 8 suddenly collides with the lock portion 40 and is damaged. At the same time, the photo-interrupter for the stop command command, which is required in the above-described embodiment, becomes unnecessary, and the cost of the traveling body drive device can be reduced. In this example,
As a control method, digital PI control is taken as an example.
It may be controlled by analog control, PID control, modern control, or the like.

Next, an embodiment of the invention described in claim 4 will be described with reference to FIGS. The description of the same parts as those in the first to third aspects of the present invention is omitted, and the same parts are designated by the same reference numerals.

Here, the second traveling body 8 is stopped at a non-contact position immediately before the lock pin 38 reaches the apex position P of the tapered portion 41, and then the traveling body drive current is increased or decreased in a predetermined pattern. A traveling body stop position control means for driving the second traveling body 8 is provided.

FIG. 7 shows a control system of the traveling body drive device (including traveling body stop position control means). Here, the control voltage determination unit 65 of FIG. 5 described above is omitted, and the control voltage value V (i) of the calculation unit 63 is directly input to the linear motor 51. FIG. 8 shows the control flow. First, it is checked whether the second traveling body 8 is locked. As a method for checking this, for example, a detector such as a photo interrupter is arranged in front of the position where the lock pin 38 reaches the taper portion 41 and behind the reading end position and is monitored. Can be executed by Then, when it is determined that the second traveling body 8 is not locked (that is, at the time of reading an image and at the time of returning), the control calculation is performed with the configuration of FIG. 7, and the calculation result is output to the linear motor 51. On the other hand, when it is determined that the second traveling body 8 is in the locked state, the control voltage value V (i) is input according to the time table previously set in the read-on memory 49b and the random access memory 49c,
Then, V (i) is output to the linear motor. Such control is repeatedly performed until the linear motor 51 is stopped.

Next, the time table of FIG. 8 will be described in more detail with reference to FIGS. 9 and 10. First, the position To of FIG. 9 indicates the position of the photo interrupter that detects the moving position of the traveling body. Now, when it is confirmed that the control is locked, the control voltage value is set to 0 only for the time of Ta. The set time here means that after the control voltage is set to 0,
As shown in FIG. 10, the linear motor 51 refers to the time until the lock pin 38 comes into contact with the taper portion 41 or stops immediately before that. Accordingly, the photo interrupter is installed at a position where the linear motor 51 can be stopped at this position when the drive stop command is issued to the linear motor 51. After that, the control voltage of the time table is gradually increased so as to gradually push down the taper portion 41 in accordance with the shape of the taper portion 41, as shown at time Tb in FIG. Return to 0. The timing of returning to 0 is when the inertial force at that time overcomes the remaining area of the taper portion 41 and exhausts the inertial force in order to get over the area, and the second traveling body 8 stops immediately after getting over the taper portion 41.

In the embodiments of the invention described in claims 1 to 3, the lock pin 38 and the lock portion 40 are all provided.
Although the traveling body or the like will not be damaged by the impact due to the collision with, the impact due to the collision between the lock pin 38 and the taper portion 41 cannot be avoided. On the other hand, in the traveling body stop position control means in this embodiment, the lock pin 38 and the taper portion 41 are stopped before they collide with each other, and thereafter the drive control voltage is gradually increased. The impact due to the collision with the portion 41 can be completely avoided, and the damage of the parts can be prevented as much as possible.

Next, an embodiment of the invention described in claim 5 will be described with reference to FIG. The description of the same parts as those in the first to fourth aspects of the present invention is omitted, and the same parts are designated by the same reference numerals.

In the above-described inventions according to claims 1 to 4, the second traveling body 8 is locked while moving when the transparent original 14 is attached or detached. Therefore, as shown in FIG. Therefore, it is necessary for the lock portion 40 to have some play. For this reason, it is somewhat difficult to use such a lock mechanism having some play when the image reading apparatus is conveyed, which has a greater impact than when the transparent original 14 is attached or detached.

Therefore, in this embodiment, the lock portion 40 of the traveling body lock device is replaced with the first lock portion 40 when the transparent original is attached or detached.
a and the second lock portion 40b during conveyance of the image reading apparatus 2
It is composed of steps. FIG. 11A shows a state in which the first lock portion 40a is locked, and FIG.
1 (b) shows a state when the second lock portion 40b is locked. The first lock portion 40a is formed in an L shape having a vertical side surface portion and a flat bottom surface portion, and the second lock portion 40b is formed in a cylindrical size and shape to which the lock pin 38 can be fitted. This second lock portion 40
b is located below the first lock portion 40a.

Further, a male screw member 66 for keeping the lock plate member 39 in a substantially horizontal state except when the image reading apparatus is being conveyed is arranged above the lock plate member 39. The male screw member 66 is fixedly held by a female screwed fixing member 67 fixed to the apparatus body 46. The elastic support member 48 has an elastic constant that allows the lock plate member 39 to be horizontal when the power source of the solenoid is OFF and more inclined than when the image reading device is in the transporting state shown in FIG. 11B. is doing.

In such a structure, as shown in FIG. 11A, the male screw member 6 is used except when the image reading apparatus is being conveyed.
6 is lowered with a screwdriver or the like, and the lock plate member 39 is pushed down in opposition to the force of the elastic support member 48. In this state, the lock plate member 39 functions as described above, and can function as a lock device when the transparent original is attached or detached. on the other hand,
When the image reading apparatus is conveyed, the male screw member 66 is raised by a driver or the like. As a result, the lock pin 38
Is automatically set in the second lock portion 40b, and the second traveling body 8 is completely locked and does not move. Then, when the image of the transparent original 14 is desired to be read again after the conveyance is completed, the male screw member 66 is lowered to the reading side as described above.

As described above, since the lock portion 40 has the two-stage structure of the first lock portion 40a and the second lock portion 40b, the traveling body lock device at the time of attaching / detaching the transparent original and the traveling at the time of conveying the image reading device. It can also serve as a body lock device, which can further reduce the cost of the image reading device.

Next, an embodiment of the invention described in claim 6 will be described with reference to FIGS. 12 and 13. In addition, claim 1
The description of the same parts as those of the invention described in 5 is omitted, and the same reference numerals are used for the same parts.

In the invention described in claim 5, the traveling body can be locked when the image reading apparatus is conveyed, but the male screw member 66 and the fixing member 67 are provided, and these members are used by a driver when used. It has the drawback of having to be adjusted.

In view of this, in this embodiment, a protruding partition 40c is formed between the first lock 40a and the second lock 40b of the lock 40. 12
12A shows the locked state of the second traveling body 8 when the transparent original is attached and detached, and FIG. 12B shows the second traveling body 8 when the image is read and conveyed.
It shows the locked state of. The elastic constant of the elastic support member 48 is set to a value that gives a moment for keeping the lock plate member 39 substantially horizontal when the power of the solenoid is turned off.

In such a structure, the driving force of the linear motor is 0 (see FIG. 9) in the area inside the lock portion 40 that has passed over the taper portion 41, so the lock pin 3
8 reaches the first lock portion 40a, the partition portion 40c
Therefore, it is possible to function as a lock device when the transparent original is attached or detached.

FIG. 13 shows a state where the image reading apparatus is being conveyed.
It shows the flow of the lock means of the second traveling body 8.
First, a button for transportation is attached to the apparatus main body, and the button is pushed before turning off the power before transportation. Thus, it is determined whether or not the image is being read and conveyed. When the image is read and conveyed, the flow for locking the traveling body is entered. in this case,
A predetermined voltage is applied to the linear motor, and the linear motor is continuously driven until the lock pin 38 gets over the partition 40c and is locked by the second lock 40b. Then, when the second traveling body 8 is locked, the driving of the linear motor is stopped. As a result, the locked state as shown in FIG. 12B is obtained, and the second traveling body 8 remains completely locked even after the power is turned off and the image reading apparatus is conveyed. When the image reading apparatus is used after being conveyed, the lock plate member 39 may be pulled down by the driving force of the solenoid, as in the case where the attachment / detachment of the transparent original is completed. On the other hand, when the image reading apparatus is not being transported, the processing can be performed by the same procedure as the above-described flow of FIG.

As described above, by providing the convex partition 40c between the first lock 40a and the second lock 40b, the member having the lock 40 can be fixed by using a screw or the like. In addition, it is possible to serve both as the traveling body locking device when the transparent original is attached and detached, and as the traveling body locking device when the image reading device is conveyed, thereby further reducing the number of parts.

In each of the above embodiments, the reflection original 2 is used.
In a case where the contact glass 13 for reading the transparent original 14 is installed on the second traveling body 8 for reading the reflective original 2 in the optical system capable of selecting the mode for reading the transparent original 14 and the mode for reading the transparent original 14 such as film. As described above, the contact glass 13 for reading the transparent original 14 is installed on the first traveling body 7, and the linear motor is installed on the first traveling body 7 on the side where the transparent original 14 is read. You may do it. Further, although the linear motor is used as the traveling body in the description, a rotating DC motor, a pulse motor, a direct drive motor, or the like may be used. Furthermore, although the pin member is used as the locking member and the plate member is used as the member having the lock portion 40, the present invention is not limited to these materials. Furthermore, an example in which the lock plate member 39 having the taper portion 41 and the lock portion 40 is installed in the device main body 46 and the lock pin 38 is provided on the traveling body side has been described. On the contrary, the taper portion on the traveling body side is provided. It is also possible to install a lock plate member 39 having 41 and a lock portion 40 and provide the device body 46 with the lock pin 38.

[0063]

According to the first aspect of the present invention, a light source and an original table for reading a reflective original, a light source and an original table for reading a transparent original, and first and second units installed on the reading side of the reflective original.
A traveling body, and the original plate for reading the transparent original is continuously provided to either one of the first and second traveling bodies, and drives the first and second traveling bodies in the reflection mode. The reflective original is read by the user, and in the transmissive mode, the transparent original is read by driving the original plate for reading the transparent original with one of the first and second running bodies as the main drive side. In the traveling body drive device, a locking member is formed on either one of the traveling body and the main body, and the transparent original has a locking portion that fits with the locking member and a taper portion adjacent to the locking portion. Since the traveling body lock device for locking the traveling body at the time of attachment / detachment of the transparent document is provided, the phenomenon that the document table is moved when the transparent document is attached / detached is eliminated, and the attachment / detachment work of the transparent document can be facilitated. A.

According to a second aspect of the present invention, in the first aspect of the present invention, a traveling body stop position control means for stopping the driving of the traveling body is provided before the locking member reaches the apex position of the tapered portion. Therefore, it is possible to prevent the traveling body from abruptly colliding with the lock portion and being damaged.

According to a third aspect of the present invention, in the first aspect of the invention, the drive current of the traveling body is monitored, and when the value exceeds a predetermined value, the traveling body is stopped from being driven. Since the stop position control means is provided, it is possible to prevent the traveling body from abruptly colliding with the lock portion and being damaged, and a sensor for detecting the traveling body stop position is not required, so that the traveling body drive device can be manufactured at low cost. It can be realized.

According to a fourth aspect of the present invention, in the first aspect of the invention, the traveling body is stopped at a non-contact position immediately before the locking member reaches the apex position of the tapered portion, and then a predetermined pattern is set. Since a traveling body stop position control means for driving the traveling body by increasing or decreasing the traveling body drive current is provided, the locking member is temporarily stopped in a non-contact state, and then the locking member rides over the taper portion and locks. Therefore, it is possible to completely prevent the phenomenon that the traveling body suddenly collides with the lock portion and is damaged.

According to a fifth aspect of the present invention, in the second, third or fourth aspect of the present invention, the traveling body locking device includes a first locking portion when the transparent original is attached and detached, and a first locking portion when the image reading device is conveyed. Since it is constituted by two stages of two lock parts, it can serve as a traveling body locking device at the time of attaching / detaching the transparent original and a traveling body locking device at the time of conveying the image reading device, whereby the cost of the image reading device can be reduced. It is possible.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, since a convex partitioning portion is formed between the first lock portion and the second lock portion, which are in two stages, the lock is made by a screw or the like. Without fixing a member having a section, it is possible to serve as a traveling body locking device when attaching and detaching a transparent original and a traveling body locking device when the image reading device is conveyed, with the number of parts being further reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a traveling body lock device that is an embodiment of the invention according to claims 1 and 2.

FIG. 2 is a block diagram showing a configuration of a speed control device used in the traveling body drive device according to the third aspect of the invention.

FIG. 3 is a timing chart in the processing of the state detection interface device.

FIG. 4 is a flowchart showing an interrupt routine in the process of the state detecting interface device.

FIG. 5 is a block diagram showing a control system of the traveling body drive apparatus.

FIG. 6 is a flowchart illustrating control of the traveling body drive device.

FIG. 7 is a block diagram showing a control system of a traveling body drive apparatus according to a fourth aspect of the invention.

FIG. 8 is a flowchart illustrating control of the traveling body drive device.

FIG. 9 is a characteristic diagram showing how the control voltage changes with application time.

FIG. 10 is a side view of the traveling body lock device showing a state immediately before the lock member is fitted into the lock portion.

FIG. 11 is a side view showing a configuration of a traveling body lock device that is an embodiment of the invention according to claim 5;

FIG. 12 is a side view showing a configuration of a traveling body lock device that is an embodiment of the invention according to claim 6;

FIG. 13 is a flowchart illustrating locking of a traveling body during image reading and conveyance.

FIG. 14 is a side view showing the configuration of the image reading apparatus.

FIG. 15 is a plan view showing a configuration of a traveling body portion of the traveling body drive device.

FIG. 16A is a side view showing a belt laid state at a reading scanning start position, and FIG. 16B is a side view showing a belt laid state at a reading scanning end position.

[Explanation of symbols]

 1 Document Plate 2 Reflected Document 3 Light Source 7 First Traveling Body 8 Second Traveling Body 13 Document Platform 14 Transparent Document 15 Light Source 37 Traveling Body Locking Device 38 Locking Member 40 Locking Part 40a First Locking Part 40b Second Locking Part 40c Partition Part 41 Tapered part

Claims (6)

[Claims] 1. A transparent original reading device comprising: a light source and a document table for reading a reflective original document; a light source and a document table for reading a transparent original document; and first and second traveling bodies installed on a reading side of the reflective original document. A document table for use with either one of the first and second traveling bodies, and in the reflection mode, the first and second traveling bodies are driven to read the reflection original, and in the transmission mode. Sometimes, in one of the first and second traveling bodies, the traveling body driving device that reads the transparent original by driving the original plate for reading the transparent original with the traveling body of one of the first and second traveling bodies as a main driving side is used. Traveling in which a locking member is formed on either one of the main bodies, and the locking member is fitted with the locking member, and the taper portion is adjacent to the locking member. Body lock A traveling body drive device comprising a device. 2. The traveling body drive apparatus according to claim 1, further comprising traveling body stop position control means for stopping the driving of the traveling body before the locking member reaches the apex position of the tapered portion. . 3. A traveling body stop position control means for monitoring the driving current of the traveling body and stopping the driving of the traveling body when the value exceeds a predetermined value. 1. The traveling body drive device according to 1. 4. The traveling body is stopped at a non-contact position immediately before the locking member reaches the apex position of the tapered portion, and then the traveling body drive current is increased or decreased in a predetermined pattern to drive the traveling body. 2. The traveling body drive apparatus according to claim 1, further comprising traveling body stop position control means. 5. A lock portion of the traveling body lock device includes a first lock portion when the transparent original is attached and detached and a second lock portion when the image reading device is conveyed.
3. The structure according to claim 2, wherein the structure comprises two stages including a lock portion.
3. The traveling body drive device according to 3 or 4. 6. The traveling body drive apparatus according to claim 5, wherein a convex partitioning portion is formed between the first locking portion and the second locking portion that are two-tiered.