JP2010055677A - Disk conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk conveying device capable of surely detecting stacked insertion of disks. <P>SOLUTION: The disk conveying device 1 includes a pair of conveyance rollers 2a and 2b for conveying a disk by sandwiching it between front and rear surfaces, insertion detection sensors 3a and 3b for detecting disk conveyance, an insertion completion detection sensor 4 for detecting the insertion of the disk into a predetermined position, and a control unit for controlling operations of the pair of conveyance rollers 2a and 2b based on signals input from the insertion detection sensors 3a and 3b and the insertion completion detection sensor 4. Conveying speeds of the pair of conveyance rollers 2a and 2b are set to be different. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk transport apparatus that transports a disk into the apparatus by rotationally driving a transport roller, and more particularly to a disk transport apparatus that prevents erroneous insertion into the apparatus when two disks are overlapped. is there.

  Conventionally, as a mechanism for preventing the insertion of two stacked discs, a mechanism for preventing conveyance of a disc having a thickness greater than that when the discs are overlapped is used. For example, in Patent Document 1, in a transport mechanism that transports a disc-shaped recording medium inserted from a disc insertion opening formed on the front surface of a housing, the width in the vertical direction of the disc insertion opening is the smallest at both left and right ends. It is configured such that it gradually increases as it goes to the center in the direction, and the central portion becomes the largest. Furthermore, the width in the vertical direction of the left and right end portions of the disc insertion slot is configured to be less than twice the thickness of the disc-shaped recording medium.

JP 2003-338120 A

  However, the conventional disc transport mechanism is designed to prevent the transport of more than the stack thickness when the discs are stacked. It is difficult to prevent this, and there are problems such as scratching the disk and worsening the feeling of inserting the disk.

  The present invention has been made to solve the above-described problems, and even when a thin disk is inserted in a stacked manner or when the disk is inserted in a shifted manner, it is possible to reliably detect the overlapping insertion of the disk. An object of the present invention is to obtain a disc transport device that can be used.

  In the disk transport apparatus according to the present invention, the transport speeds of the pair of transport rollers for transporting the disk while sandwiching the disk from both front and back surfaces are different.

  According to the present invention, since the conveying speeds of the pair of conveying rollers for conveying the disk while sandwiching the disk from both sides are different, it is possible to reliably prevent erroneous insertion such as overlapping insertion of the disks. it can.

Embodiment 1 FIG.
1A and 1B are side views showing the configuration of the disk transport apparatus according to the first embodiment. FIG. 1A shows the start of disk insertion, and FIG. 1B shows the end of disk insertion. FIG. 2 is a top view at the end of disc insertion. 1 and 2 show a state in which two disks A and B are overlapped and inserted.
The conveyance mechanism provided in the disk conveyance device 1 includes conveyance rollers 2a and 2b for conveying the disk, insertion detection sensors (first detection sensors) 3a and 3b for detecting the insertion of the disk and foreign matter, and the insertion of the disk is completed. It is composed of an insertion completion detection sensor (second detection sensor) 4 for detecting that the operation has been performed.

  The transport rollers 2a and 2b are arranged so as to sandwich the inserted disc from both the front and back surfaces. The transport rollers 2a and 2b are driven by a motor (not shown), but the upper transport roller 2a and the lower transport roller 2b are rotated at different speeds by meshing with the motor at different gear ratios. In the example of FIGS. 1 and 2, the lower conveying roller 2b is set to rotate at a higher speed than the upper conveying roller 2a. Therefore, the disk B is transported into the disk device 1 faster than the disk A.

  The insertion detection sensors 3a and 3b are respectively arranged at the left and right positions in the vicinity of the disc insertion slot 1a. The insertion detection sensors 3a and 3b are composed of, for example, light transmission sensors and the like, and include a pair of sensors arranged so that light is transmitted in a direction perpendicular to the insertion direction of the disk. When the light is transferred between the sensors and the light between the pair of sensors is blocked by the insert, the detection state (= 1) is indicated. When the light does not pass through the insert and the light is transmitted between the sensors, the non-detection state ( = 0). The insertion completion detection sensor 4 is provided in the innermost part of the disc transport device 1 and indicates an ON state when the switch unit 4a is pressed by a disk inserted to a predetermined position, and when the switch unit 4a is released. Indicates the OFF state.

  In the example shown in FIGS. 1 and 2, the disk B transported by the transport roller 2b rotating at a higher speed is transported into the disk device 1 before the disk A and presses the switch unit 4a. At this time, the disk A is in the middle of conveyance, and the insertion detection sensors 3a and 3b are shielded from light. In this way, when the insertion completion detection sensor 4 is pressed by one disk and the insertion detection sensors 3a and 3b are in the detection state (= 1, 1) by the other disk, the disks are overlapped and inserted. It can be determined that the foreign object is inserted due to the above.

  FIG. 3 is a block diagram showing the configuration of the disk transport device according to the first embodiment. In addition to the transport rollers 2a and 2b, the insertion detection sensors 3a and 3b, and the insertion completion detection sensor 4 shown in FIGS. 1 and 2, the disk transport apparatus 1 includes a control unit that includes an insertion determination unit 51 and an operation control unit 52. (Control means) 5, motor driver 6, and motor (drive means) 7.

  The insertion determination unit 51 of the control unit 5 determines whether or not the disc has been normally inserted based on detection signals input from the insertion detection sensors 3a and 3b and the insertion completion detection sensor 4. The operation control unit 52 outputs a drive control instruction to the motor driver 6 based on the determination result of the insertion determination unit 51. The motor driver 6 drives the motor 7 in accordance with the input drive control instruction, and the conveying rollers 2a and 2b are rotated at a predetermined rotational speed by the driving force of the motor 7.

Next, the operation of the disk transport device will be described. FIG. 4 is a timing chart showing the operation of the disk transport device according to the first embodiment, and FIG. 5 is a flowchart thereof. FIG. 4A shows a timing chart when the disc is normally inserted, and FIG. 4B shows a timing chart when the disc is repeatedly inserted.
4A and 4B, the insertion detection sensors 3a and 3b are in the transmission state (= (0, 0)), the insertion detection sensor 4 is in the OFF state, and the transport roller 2a , 2b are stopped. When the insertion of the disk is started, the insertion detection sensors 3a and 3b are both in a light shielding state (= (1, 1)), and the transport rollers 2a and 2b start to rotate in the disk insertion direction.

  When the disc of FIG. 4A is normally inserted, both the insertion detection sensors 3a and 3b are in the transmission state (= (0, 0)) before the disc insertion is completed. Thereafter, the switch portion 4a of the insertion detection sensor 4 is pressed by the disk to be turned on. As described above, when the insertion detection sensor 4 is in the ON state, the insertion detection sensors 3a and 3b indicate the transmission state (= (0, 0)), so that the insertion determination unit 51 of the control unit 5 normally inserts the disc. It is determined that When it is determined that the disc has been normally inserted, the rotation of the transport rollers 2a and 2b is stopped.

  The insertion completion detection sensor 4 determines whether or not the insertion detection sensors 3a and 3b of the insertion determination unit 51 are in the transmissive state when the insertion detection sensor 4 is ON, that is, whether or not the disc has been normally inserted. This is performed after waiting for a predetermined delay time (for example, 100 ms) after the signal becomes ON. This is because the determination is performed using the reliable detection results of the insertion detection sensors 3a and 3b and the insertion completion detection sensor 4.

  On the other hand, when the disk shown in FIG. 4B is repeatedly inserted, the disk B transported by the transport roller 2b having a higher rotational speed first presses the switch portion 4 of the insertion completion detection sensor 4 to turn on. State. At this time, the disk A transported by the transport roller 2a having a low rotational speed has not reached the transport completion detection sensor 4, and the insertion detection sensors 3a and 3b are shielded from light. As described above, when the insertion detection sensor 4 is in the ON state, the insertion detection sensors 3a and 3b indicate the light shielding state (= (1, 1)), so that the insertion determination unit 51 of the control unit 5 is foreign object insertion. judge. The determination of foreign object insertion is also made after waiting for a predetermined delay time (for example, 100 ms). If it is determined that foreign matter is inserted, the transport rollers 2a and 2b start to rotate in the direction of ejecting the erroneously inserted disc.

Next, the operation of the disc transport apparatus will be described with reference to the flowchart of FIG.
The insertion determination unit 51 of the control unit 5 determines whether or not both of the insertion detection sensors 3a and 3b are in a light shielding state (= (1, 1)) (step ST1). If it is determined in step ST1 that the insertion detection sensors 3a and 3b are not in the light shielding state, the process returns to the standby state. On the other hand, when it is determined in step ST1 that the insertion detection sensors 3a and 3b are in the light shielding state, the insertion determination unit 51 outputs a determination result to the operation control unit 52, and the operation control unit 52 receives the input determination result. Based on the above, a drive control instruction is output to the motor driver 6 to rotate the motor 7 forward (step ST2).

  By forward rotation of the motor 7 in step ST2, the transport rollers 2a and 2b rotate in the disk insertion direction, and the disk insertion into the apparatus proceeds. The insertion determination unit 51 determines whether or not the insertion completion detection sensor 4 has been turned on (step ST3). If it is determined in step ST3 that the insertion completion detection sensor 4 is in the OFF state, the process returns to step ST3. On the other hand, if it is determined in step ST3 that the insertion completion detection sensor 4 is in the ON state, after waiting for 100 ms (step ST4), the insertion determination unit 51 causes both the insertion detection sensors 3a and 3b to be in a transparent state (= ( 0, 0)) is determined (step ST5).

  In step ST5, when it is determined that the insertion detection sensors 3a and 3b are in the transmissive state, it is determined that the disc has been normally inserted, the determination result is output to the operation control unit 52, and the operation control unit 52 is determined. Outputs a drive control instruction to the motor driver 6 based on the input determination result. The motor driver 6 stops the motor 7 based on the drive control instruction (step ST6) and ends the process.

  On the other hand, if it is determined in step ST5 that the insertion detection sensors 3a and 3b are not in the transmissive state, it is determined that the foreign object is inserted, the determination result is output to the operation control unit 52, and the operation control unit 52 is input. Based on the determination result, a drive control instruction is output to the motor driver 6. The motor driver 6 reversely rotates the motor 7 based on the drive control instruction (step ST7). After the reverse rotation of the motor 7, after waiting for a predetermined delay time (for example, 100 ms) (step ST8), both the insertion detection sensors 3a and 3b are used to determine whether or not the ejection of the erroneously inserted disc is completed. It is determined whether the transmission state (= (0, 0)) and whether the insertion completion detection sensor 4 is in the OFF state (step ST9).

  If it is determined in step ST9 that the insertion detection sensors 3a and 3b are not in the transmissive state or the insertion completion detection sensor 4 is not in the OFF state, the process returns to step ST9. On the other hand, when it is determined in step ST9 that both the insertion detection sensors 3a and 3b are in the transmissive state and the insertion completion detection sensor 4 is in the OFF state, it is determined that the discharge of the foreign matter is completed, and the determination result is operation controlled. The operation control unit 52 outputs a drive control instruction to the motor driver 6 based on the input determination result. The motor driver 6 stops the motor 7 based on the drive control instruction (step ST10) and ends the process.

  As described above, according to the first embodiment, since the two conveying rollers 2a and 2b that mesh with the motor at different gear ratios and convey the disk at different conveying speeds are provided, the disk is overlapped and inserted. In this case, it is possible to reliably detect erroneous insertion due to the difference in the conveying speed of the upper and lower disks.

  Further, according to the first embodiment, in addition to the two transport rollers 2a and 2b that transport the disk at different transport speeds, the insertion detection sensors 3a and 3b that detect the insertion of the disk and the disk are predetermined in the rear portion of the apparatus. Since the insertion completion detection sensor 4 for detecting that the disk is inserted at the position is provided, both the insertion detection sensor and the insertion completion detection sensor are used for the upper and lower disks conveyed at different speeds when the disks are repeatedly inserted. The detection state is indicated to notify the insertion of a foreign object, and erroneous insertion can be reliably detected. As a result, it is possible to detect when a thin disk is inserted or when the disk is shifted and inserted, and it is possible to reliably prevent repeated insertion.

  In the first embodiment, the configuration in which the two insertion detection sensors 3a and 3b are provided is shown. However, the number of insertion detection sensors is not limited to this, and can be arbitrarily set.

  In the first embodiment, the standby time when determining whether or not the disk has been normally inserted and the standby time after determining that the disk is erroneously inserted and reversing the motor are set to 100 ms, respectively. Although an example has been shown, these waiting times can be arbitrarily set.

Embodiment 2. FIG.
FIG. 6 is a side view showing the configuration of the disk transport device according to the second embodiment. In this disk conveying apparatus, the radii of the conveying roller 2a ′ and the conveying roller 2b ′ rotating at the same speed are different from each other. In the following, the same or corresponding parts as those of the disk transport apparatus according to the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and the description thereof is omitted or simplified.

  The radii of the transport roller 2a ′ and the transport roller 2b ′ are different. In the example of FIG. 6, the radius of the transport roller 2a ′ located on the upper side is smaller than the radius of the transport roller 2b ′ located on the lower side. It is configured. Even if the gear ratios of the motor (not shown) and the transport rollers 2a 'and 2b' are the same, the upper of the discs that are repeatedly inserted due to the difference in radius of the transport rollers 2a 'and 2b'. The lower disk B can be transported at a higher speed than the disk A.

  As described above, according to the second embodiment, the radii of the transport roller 2a ′ and the transport roller 2b ′ are different from each other. Misinsertion can be detected. Further, since it is not necessary to adjust the gear ratio with the motor and only the radius of each conveying roller is different, the number of parts to be changed is small and introduction is easy.

Embodiment 3 FIG.
In the first embodiment, the configuration in which the gear ratios of the motor and the transport rollers 2a and 2b are different is shown. In the second embodiment, the configuration in which the radii of the transport roller 2a and the transport roller 2b are different is shown. In Mode 3, the conveyance rollers 2a and 2b have the same radius, and two motors (not shown) are provided so that the conveyance rollers 2a and 2b are driven by different motors. Yes. By controlling the transport roller 2a and the transport roller 2b by different motors independently to make the transport speeds different, the discs inserted in the same manner as in the first and second embodiments can be transported at different upper and lower speeds.

  As described above, according to the third embodiment, two motors are provided and the conveyance speeds of the conveyance rollers 2a and 2b are controlled using independent motors. Even when the disc is inserted, erroneous insertion can be detected by the difference in the disc transport speed. In addition, in the ejecting operation after detecting the overlapped insertion of the discs, the upper and lower discs can be ejected at the same speed by driving the two motors at the same speed, and the discs can be ejected in a state where the discs are shifted up and down. Can clearly indicate the insertion of a disc.

It is a side view which shows the structure of the disc conveying apparatus which concerns on Embodiment 1 of this invention. It is a top view which shows the structure of the disc conveying apparatus based on Embodiment 1 of this invention. It is a block diagram which shows the structure of the disc conveying apparatus concerning Embodiment 1 of this invention. It is a timing chart which shows operation | movement of the disc conveying apparatus based on Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the disc conveying apparatus based on Embodiment 1 of this invention. It is a side view which shows the structure of the disc conveying apparatus based on Embodiment 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Disc conveyance apparatus, 1a Disc insertion slot, 2a, 2b, 2a ', 2b' Conveyance roller, 3, 3a, 3b Insertion detection sensor, 4 Insertion completion detection sensor, 4a Switch part, 5 Control part, 6 Motor driver, 7 Motor, 51 insertion determination unit, 52 operation control unit, A, B disk.

Claims (4)

A pair of transport rollers for transporting the disk from both sides,
A first detection sensor for detecting conveyance of the disc;
A second detection sensor for detecting that the disc has been inserted into a predetermined position;
A disk transport apparatus having control means for controlling operations of the pair of transport rollers based on signals input from the first and second detection sensors;
A disk transport apparatus characterized in that the transport speeds of the pair of transport rollers are different. Comprising a drive means for driving a pair of transport rollers;
2. The disk transport apparatus according to claim 1, wherein gear ratios of the driving unit and the pair of transport rollers are made different.   2. A disk transport apparatus according to claim 1, wherein the pair of transport rollers rotating at the same speed have different radii. Comprising two drive means for independently driving the pair of transport rollers,
2. The disk transport apparatus according to claim 1, wherein the pair of transport rollers are driven at different transport speeds by the two driving units.

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