JP2008063117A - Automatic roll feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately position the core center of a roll at a predetermined part such as a chucking device of a production machine without installing any means on a floor for automatically feeding a roll such as a web roll to the production machine by an automated guided vehicle. <P>SOLUTION: The automated guided vehicle comprises a vertical driving mechanism for driving a loading part on which the roll is placed in the vertical direction and a horizontal driving mechanism for driving it in the horizontal direction. The automated guided vehicle further comprises a laser beam source installed near the predetermined part, a detection means installed on the automated guided vehicle, having a light receiving surface for receiving the laser beam from the laser beam source and detecting a laser beam receiving position on the light receiving surface, and a positioning control circuit calculating the displacement of the detected beam receiving position from the reference position and controlling the vertical driving mechanism and the horizontal driving mechanism to eliminate the calculated displacement. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus for automatically supplying a raw roll to a production machine such as a film coater or a laminator.

  An unmanned traveling cart is used to supply a raw roll to a production machine (hereinafter referred to as a production machine) such as a film coater or a laminator. The carriage receives the original roll from the storage location of the original roll, travels on a track or a non-track transport path, and transfers it to the chucking device of the production machine. At the time of transfer, it is necessary to accurately position the core of the original roll on the chucking device of the production machine.

  As an example of the positioning method, a method of guiding and positioning a carriage by a track such as a rail or an LM guide (see Patent Document 1) is provided.

  On the other hand, as another example of the positioning method, an AGV (Automated Guided Vehicle), that is, a method using a trackless carriage is also provided. The positioning in this case is usually performed using three conical cones installed at predetermined positions on the floor, which is the transfer location of the original fabric roll. That is, on the AGV side, elevating type receiving portions that fit into the conical cones are provided at positions symmetrical to the three conical cones. The AGV has a travel control function that stops at a position where the three conical cones and the three receiving parts almost fit, and the precision is achieved by lowering the receiving part at this position and fitting it into the conical cone. Good positioning is performed.

  However, both methods require installation of rails, LM guides, conical cones and the like on the floor, and are avoided from customers who desire a flat floor.

JP 2002-66631 A

  An object of the present invention is to automatically supply a roll body such as a raw material roll to the production machine with AGV, and to install a core of the roll body at a predetermined part of the production machine, for example, chucking without installing any means on the floor. The object is to enable accurate positioning on the apparatus.

  In the present invention, a roll body having a hollow core at the center is mounted on an AGV and conveyed, and the roll body is transferred in a state where the core center is positioned at a predetermined portion on the side where the roll body is transferred. The AGV includes a vertical drive mechanism that drives a mounting portion on which the roll body is mounted in a vertical direction and a horizontal drive mechanism that drives in a horizontal direction. A laser light source installed in the vicinity, a detecting unit installed in the AGV and having a light receiving surface for receiving laser light from the laser light source, and detecting a light receiving position of the laser light on the light receiving surface; And a positioning control circuit for controlling the vertical driving mechanism and the horizontal driving mechanism so as to calculate a deviation amount of the received light receiving position from the reference position and eliminate the calculated deviation amount. .

  In the roll automatic supply device according to the present invention, preferably, the core of the roll body has protrusions protruding from both ends of the roll body, and the mounting portion receives the protrusions on both sides of the roll body. Each of the two arms is provided with the vertical drive mechanism and the horizontal drive mechanism, and the positioning control circuit corresponds to the two arms. Two portions that are individually provided and can correspond to the protruding portions on both sides of the roll body are set as the predetermined portion, the laser light source is installed in the vicinity thereof, and the receiving portions of the two arms The detection means are installed at locations close to each other, and the two arms are independently driven in the vertical and horizontal directions.

  As the detecting means, it is preferable to use PSD or a combination of a screen for receiving the laser beam and an ITV camera for detecting the light receiving position of the laser beam on the screen.

  The roll automatic supply device according to the present invention can accurately position the core center of the roll body at a predetermined site on the transfer side without installing a rail, an LM guide, a conical cone or the like on the floor.

  The roll automatic supply device according to the present invention also has a roll body caused by unevenness and minute inclination of the floor surface at the transfer position of the roll body, wear of the tire for traveling in the AGV, air pressure fluctuation inside the tire, and weight change of the roll body. The core center of the roll body can be accurately positioned at a predetermined site on the transfer side without being affected by the height position fluctuation.

  Before describing the embodiment of the present invention, the difficulty of positioning when transferring a raw roll to a chucking device of a production machine by AGV will be described with reference to FIGS. 4 and 5.

  FIG. 4 shows a state in which the AGV 100 has traveled to a predetermined part in the production machine, that is, near the pair of chucking devices 300 with the original roll 200 mounted thereon, and FIG. 5 shows one end side of the original roll 200.

  The original roll 200 has a hollow core (core) 210 at its center, and the core 210 has protruding portions that slightly protrude from both ends of the roll. The AGV 100 has two arms 110 as mounting parts, each having a receiving part for receiving the protruding parts on both sides of the core 210, and transporting the raw roll 200 in a state of being placed on these receiving parts. To do. The pair of chucking devices 300 grips the original fabric roll 200 from both sides thereof. Therefore, the pair of chucking devices 300 are installed at a height position that can correspond to the core 210 of the original fabric roll 200 mounted on the AGV 100 and at an interval that can be opposed to each other while approaching the end of the core 210. Is done. Although the illustration of the structure of the chucking device 300 is omitted, for example, the chucking device 300 has an arm that can be expanded and contracted in the horizontal direction and can enter the hollow portion of the core 210. It has a chuck (claw part) that expands in the radial direction when it enters.

  In this way, the pair of chucking devices 300 holds the original roll 200 by inserting the chuck into the core 210 and gripping the core 210 from both sides when the original roll 200 is accurately positioned. can do.

  For this purpose, the AGV 100 needs to accurately align the center position of the core 210 with the chuck center of the chucking device 300. The required position accuracy is about ± 1 to 5 mm. However, it is practically impossible to obtain the above-mentioned required position accuracy by the AGV 100 alone due to the flatness accuracy of the floor 400, the deflection of the tire of the AGV 100 due to the load and the weight of the roll 200, the stop position accuracy of the AGV 100, and the like.

  With reference to FIGS. 1-3, embodiment of the automatic supply apparatus of the fabric roll by this invention which has a function which implement | achieves the said required precision is described.

  As shown in FIG. 1, the automatic supply device includes an AGV 100 having two arms (mounting portions) 110 for mounting the fabric roll 200, and the arms 110 are lifter drive mechanisms that move up and down (vertical direction). A driving mechanism) and a centering driving mechanism (horizontal driving mechanism) that moves in the horizontal direction. In the present embodiment, the automatic supply device also serves as a detection means for aligning the center of the core 210 of the raw roll 200 mounted on the two arms 110 with the chuck center of the chucking device 300 installed at a predetermined site. A combination of a laser light source and a PSD (Position Sensitive Detector) is included.

  As shown in FIG. 2, the laser light source 10 is installed in the vicinity of each of the pair of chucking devices 300, particularly on the lower side, and irradiates laser light toward the corresponding arm 110 side. Each of the two arms 110 is provided with a PSD 20 at a location corresponding to the laser light irradiation region, particularly at a location below the core 210 of the loaded roll 200. As is well known, the PSD 20 has a light receiving surface with a fixed area and is used to detect the incident position of light on the light receiving surface. In this embodiment, the light receiving position of the laser light is received. When it is off the center of the surface, it is used to align the light receiving position of the laser beam with the center of the light receiving surface.

  In the present embodiment, the PSD 20 is installed so that the light receiving surface thereof is parallel to the vertical surface, and the light receiving position on the light receiving surface (with the center position of the light receiving surface as the origin, the horizontal direction as the X axis, and the vertical direction as the Y axis) A signal indicating the position in the X direction and the position in the Y direction is output. A signal indicating the light receiving position is output to a control circuit which will be described later, and the control circuit controls the lifter driving mechanism and the centering driving mechanism in accordance with the amount of deviation of the light receiving position from the origin (reference position). Therefore, the positional relationship between the laser light source 10 and the PSD 20 is set so that the center of the mounted core 210 is aligned with the chuck center of the chucking device 300 when the laser light receiving position is at the origin (light receiving surface center). It is. When the laser light receiving position is out of the origin, the control circuit controls the lifter driving mechanism and the centering driving mechanism according to the shift amount so that the laser light receiving position returns to the origin.

  Since the lifter driving mechanism and the centering driving mechanism can be realized by using a known driving mechanism such as a ball screw, illustration and description of a specific configuration are omitted.

  Hereinafter, the PSD 20 on the left side shown in FIG. 1 is the PSD 20-1 on the left side, the PSD 20 on the right side is the PSD 20-2 on the right side, the driving direction by the left lifter driving mechanism is the Y1 direction, and the driving is by the centering driving mechanism. The direction is the X1 direction, and a circuit for controlling these drive mechanisms is called a one-side positioning control circuit. Also, the drive direction by the right lifter drive mechanism is called the Y2 direction, the drive direction by the centering drive mechanism is the X2 direction, and a circuit for controlling these drive mechanisms is called a two-side positioning control circuit.

  FIG. 3A shows the configuration of the one-side positioning control circuit, and FIG. 3B shows the configuration of the two-side positioning control circuit.

  In FIG. 3A, the one-side positioning control circuit receives a signal indicating the X1 direction position and a signal indicating the Y1 direction position from the PSD 20-1, and a signal indicating the target position (reference position) in the X1 direction, Y1 A signal indicating a target position (reference position) related to the direction is received. The 1-side positioning control circuit is based on the difference between the X1 direction position and the target position in the X1 direction, that is, the subtraction unit 51-1 for calculating the X1 direction deviation amount from the origin, and the calculated X1 direction deviation amount. And an X1 direction control unit 52-1 for controlling the one-side alignment driving mechanism. The positioning control circuit on the 1 side is also based on the difference between the Y1 direction position and the target position in the Y1 direction, that is, the subtraction unit 53-1 for calculating the Y1 direction deviation from the origin, and the calculated Y1 direction deviation. And a Y1 direction control unit 54-1 for controlling the lifter driving mechanism on the 1 side so as to be zero.

  In FIG. 3B, the 2-side positioning control circuit receives a signal indicating the X2 direction position and a signal indicating the Y2 direction position from the PSD 20-2, as well as the 1-side positioning control circuit. A signal indicating a position (reference position) and a signal indicating a target position (reference position) in the Y2 direction are received. The two-side positioning control circuit is also configured so that the difference between the X2 direction position and the target position in the X2 direction, that is, the subtracting unit 51-2 for calculating the X2 direction deviation amount from the origin, and 2 so that the X2 direction deviation amount becomes zero. X2 direction control unit 52-2 for controlling the side centering drive mechanism, subtracting unit 53-2 for calculating the difference between the Y2 direction position and the Y2 direction target position, that is, the Y2 direction deviation from the origin, and the Y2 direction And a Y2 direction control unit 54-2 for controlling the lifter driving mechanism on the second side so that the deviation amount becomes zero.

  In addition to the above-described configuration, the automatic supply device includes a traveling device of the AGV 100 and a control device that controls the automatic traveling. However, since these devices can be used in the conventional AGV. The illustration and description are omitted. However, even in the conventional AGV, the deviation amount between the center line of the core 210 of the raw roll 200 mounted on the two arms 110 and the chuck center line of the chucking device 300 is within a predetermined range (usually in the X direction, It has a travel control function that can be positioned so as to fall within a range of several centimeters with respect to the Y direction.

  As described above, since the one-side positioning control circuit and the two-side positioning control circuit have the same configuration and the same operating principle, the control operation of the one-side positioning control circuit will be described.

  As described above, the AGV 100 is controlled so that the deviation amount between the center line of the core 210 on the one side of the roll 200 and the chuck center line of the chucking device 300 on the one side falls within a predetermined range. It shall be stopped in a positioned state. In other words, this means that when the laser light source 10 is turned on in this stopped state, the laser light is always incident on the PSD 20-1. Although the laser beam source 10 may be always on, for example, the laser beam source 10 may be turned on by detecting that the AGV 100 has entered between the pair of chucking devices 300.

  If the laser light receiving position on the light receiving surface of the PSD 20-1 is the origin position in the stopped state, the subtraction units 51-1 and 53-1 do not calculate the shift amount, and the centering driving mechanism and the lifter driving mechanism. Will maintain the status quo.

  On the other hand, it is assumed that the laser beam receiving position in PSD 20-1 is (−x1, −y1) on the XY coordinate plane with the center of the light receiving surface as the origin. In this case, the subtraction units 51-1 and 53-1 calculate the shift amounts −x 1 and −y 1, and the X1 direction control unit 52-1 moves the original roll 200 horizontally by x 1 by the centering driving mechanism (in FIG. 2a). On the other hand, the Y1 direction control unit 54-1 lowers the original roll 200 by y1 (downward in FIG. 2a) by the lifter driving mechanism. In this way, the center of the core 210 on the one side of the roll 200 is positioned at the chuck center of the chucking device 300 on the one side.

  The 2-side positioning control circuit operates in the same manner as described above in parallel with the control operation of the 1-side positioning control circuit.

  As described above, the automatic roll roll feeder according to the present embodiment is provided with a positioning laser light source in the vicinity of the chucking device of the production machine, receives the laser light from the laser light source on the AGV side, Means for detecting the light receiving position, and a control circuit capable of calculating the amount of deviation of the core center from the chuck center in the original fabric roll from the light receiving position and the reference position and adjusting the position of the original fabric roll based on the calculated deviation amount And the drive mechanism, the original roll can be accurately positioned on the chucking device of the production machine without installing rails, LM guides or conical cones on the floor.

  The automatic roll roll feeder according to the present embodiment is also provided with the unevenness and slight inclination of the floor surface at the transfer position of the roll roll, the wear of the tire for traveling in the AGV, the air pressure fluctuation inside the tire, and the roll roll. Thus, the roll can be accurately positioned on the chucking device of the production machine without being affected by the height position fluctuation of the roll.

  In the above-described embodiment, the case where the PSD is used as the detection unit when the laser beam is received and the deviation amount of the light receiving position from the reference position is described, but other known detection units are used instead of the PSD. It may be used.

  FIG. 6 shows an example in which an ITV camera is used as detection means. In this example, the screen 61 is used to project the laser light from the laser light source 10, and the spot position of the laser light on the screen 61 is detected by the ITV camera 60. The ITV camera 60 assumes XY coordinates with the center position as the origin on the screen 61, and detects and outputs the X1 (X2) direction position and Y1 (Y2) direction position of the spot. By using such a combination of an ITV camera and a screen, the light receiving surface of the ITV camera is inclined due to, for example, a decrease in tire air pressure on one side compared to a configuration in which spot light from a point light source is directly received by the ITV camera. There is an effect that it is not easily affected by the case. The one-side (two-side) positioning control circuit that receives the output signal from the ITV camera 60 and controls the alignment driving mechanism and the lifter driving mechanism may be the same as that described in FIG.

  The roll automatic supply device according to the present invention can be applied not only to a production machine having a chucking device, but also to a general machine that transfers a roll body by positioning the core center of the roll body with respect to a predetermined part of the production machine.

It is a figure for demonstrating preferable embodiment of the roll automatic supply apparatus by this invention using AGV. It is a figure for demonstrating the combination of the laser light source and PSD which comprise the detection means used with the roll automatic supply apparatus of FIG. It is a figure for demonstrating the positioning control circuit used with the roll automatic supply apparatus of FIG. It is a figure for demonstrating that accurate positioning is difficult with the past AGV. It is a figure for demonstrating the original fabric roll which is the conveyance object of a roll automatic supply apparatus. It is a figure for demonstrating the other example of the detection means used with the roll automatic supply apparatus of FIG.

Explanation of symbols

10 Laser light source 20 PSD
60 ITV Camera 61 Screen 100 AGV
110 Arm 200 Raw roll 210 Core 300 Chucking device

Claims (5)

A roll body having a hollow core in the center is mounted on the AGV and conveyed, and the roll body is automatically transferred to the roll body in a state where the core center is positioned at a predetermined portion on the side where the roll body is transferred. A device,
The AGV includes a vertical driving mechanism for driving the mounting portion on which the roll body is mounted in the vertical direction and a horizontal driving mechanism for driving in the horizontal direction,
A laser light source installed in the vicinity of the predetermined part;
A detecting means installed in the AGV and having a light receiving surface for receiving laser light from the laser light source and detecting a light receiving position of the laser light on the light receiving surface;
It comprises a positioning control circuit for calculating the amount of deviation of the detected light receiving position from the reference position and controlling the vertical direction driving mechanism and the horizontal direction driving mechanism so as to eliminate the calculated deviation amount. Automatic roll feeding device. The core of the roll body has protrusions protruding from both ends of the roll body,
The mounting portion is composed of two arms having receiving portions for receiving the protruding portions on both sides of the roll body,
Each of the two arms is provided with the vertical drive mechanism and the horizontal drive mechanism, and the positioning control circuit is individually provided corresponding to the two arms,
Two locations that can correspond to the protruding portions on both sides of the roll body are set as the predetermined portions, the laser light source is installed in the vicinity thereof, and the locations near the receiving portions of the two arms, respectively. The detection means is installed;
2. The automatic roll feeding apparatus according to claim 1, wherein the two arms are independently driven in a vertical direction and a horizontal direction.   The roll automatic supply apparatus according to claim 1, wherein a PSD is provided as the detection unit.   The said detection means is equipped with the combination of the screen for light-receiving the said laser beam, and the ITV camera for detecting the light-receiving position of the laser beam on this screen, The Claim 1 or 2 characterized by the above-mentioned. Roll automatic feeding device.   The roll bodies mounted on the two arms are installed in a pair of chucking devices that are respectively installed at the two predetermined locations, enter the projecting portions on both sides of the roll body, and grip the core from both sides. It is comprised so that it may mount, The roll automatic supply apparatus of Claim 2 characterized by the above-mentioned.

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