METHOD AND DEVICE FOR CONTROLLING BOARD STOPPING POSITION AND METHOD FOR CONTROLLING BOARD MOUNTING POSITION

• US 20120011714A1
• Filed: 06/22/2011
• Published: 01/19/2012
• Est. Priority Date: 07/15/2010
• Status: Active Grant

• Current Assignee: Fuji Company Limited
• Original Assignee: Fuji Machine Manufacturing Company Limited
• Inventors: HATTORI, Tomohiko, Tsuta, Hiroshi
• Granted Patent: US 8,649,894 B2
• Time in Patent Office: Days
• US Class Current: 29/832
• CPC Class Codes: H01L 21/681 using optical controlling means
• CPC Class Codes: H01R 43/205 with a panel or printed circuit board
• CPC Class Codes: H05K 13/0015 Orientation; Alignment; Positioning
• CPC Class Codes: H05K 13/0061 Tools for holding the circuit boards during processing; handling transport of printed circuit boards
• CPC Class Codes: Y10T 29/4913 Assembling to base an electrical component, e.g., capacitor, etc.
• CPC Class Codes: Y10T 29/53174 Means to fasten electrical component to wiring board, base, or substrate
• CPC Class Codes: Y10T 29/53178 Chip component

Abstract

A method for controlling a board stopping position comprises a calculation step for calculating an extended length of the electronic component mounted on the board and extended from the board end portion in the transfer direction by one of the electronic component mounting machines and a correcting and stopping step for correcting a stopping timing of the conveyer belt to be stopped in response to the detection signal which is outputted from the board sensor and stopping the board at the mounting position, based on the calculated extended length of the electronic component in a subsequent stage electronic component mounting machine arranged subsequent to the one of the electronic component mounting machines.

Claims

1. A method for controlling a board stopping position in an electronic component mounting production line formed by a plurality of electronic component mounting machines arranged in series, each including a board transfer device which transfers a board along a transfer pathway by a conveyer belt and stops the conveyer belt to stop the board thereon at a mounting position based on a detection signal which is outputted from a board sensor provided at a reference position on the transfer pathway when the board sensor detects a board end portion in a transfer direction of the board, a component supply device for supplying various kinds of electronic components which are to be mounted on the board and a component mounting device for picking the electronic component from the component supply device and mounting the picked electronic component on the board stopped at the mounting position, by moving in the transfer direction and in a direction perpendicular thereto, the method comprising:

a calculation step for calculating an extended length of the electronic component which is mounted on the board and extended from the board end portion in the transfer direction in one of the electronic component mounting machines; and

a correcting and stopping step for correcting a stopping timing of the conveyer belt to be stopped in response to the detection signal which is outputted from the board sensor and stopping the board at the mounting position, based on the calculated extended length of the electronic component in a subsequent stage electronic component mounting machine arranged subsequent to the one of the electronic component mounting machines.

2. The method for controlling a board stopping position according to claim 1, wherein the board end portion is a front end portion of the board in the transfer direction.

3. The method for controlling a board stopping position according to claim 1, wherein the calculation step includes a step for calculating the extended length of the electronic component in a frontward direction thereof by a formula “

Px+Bx/2−

L”

under the condition that the value L is represented as L<

Px+Bx/2, wherein Px represents mounting coordinate of the electronic component at the center position thereof, assuming that the origin of system of coordinates is set to be at the rear end portion of the board in the transfer direction, Bx represents the size of the electronic component in the transfer direction and L represents the length of the board in the transfer direction.

4. A device for controlling a board stopping position in an electronic component mounting production line formed by a plurality of electronic component mounting machines arranged in series, each including a board transfer device which transfers a board along a transfer pathway by a conveyer belt and stops the conveyer belt to stop the board thereon at a mounting position based on a detection signal which is outputted from a board sensor provided at a reference position on the transfer pathway when the board sensor detects a board end portion in a transfer direction of the board, a component supply device for supplying various kinds of electronic components which are to be mounted on the board and a component mounting device for picking the electronic component from the component supply device and mounting the picked electronic component on the board stopped at the mounting position, by moving in the transfer direction and in a direction perpendicular thereto, comprising:

a calculation means for calculating an extended length of the electronic component which is mounted on the board and extended from the board end portion in the transfer direction in one of the electronic component mounting machines; and

a correcting and stopping means for correcting a stopping timing of the conveyer belt to be stopped in response to the detection signal which is outputted from the board sensor and stopping the board at the mounting position, based on the calculated extended length of the electronic component in a subsequent stage electronic component mounting machine arranged subsequent to the one of electronic component mounting machines.

5. The device for controlling a board stopping position according to claim 4, wherein the board sensor includes a light beam ejecting portion for ejecting a light beam in a direction perpendicular to the transfer direction and a light beam receiving portion positioned oppositely to the light beam ejecting portion by sandwiching the transfer pathway therewith and outputting the detection signal upon receipt of the light beam ejected from the ejecting portion.

6. A method for controlling a board mounting position in an electronic component mounting production line formed by a plurality of electronic component mounting machines arranged in series, each including a board transfer device which transfers a board along a transfer pathway by a conveyer belt and stops the conveyer belt to stop the board thereon at a mounting position based on a detection signal which is outputted from a board sensor provided at a reference position on the transfer pathway when the board sensor detects a board end portion in a transfer direction of the board, a component supply device for supplying various kinds of electronic components which are to be mounted on the board and a component mounting device for picking the electronic component from the component supply device and mounting the picked electronic component on the board stopped at the mounting position, by moving in the transfer direction and in a direction perpendicular thereto, the method comprising:

a calculation step for calculating an extended length of the electronic component which is mounted on the board and extended from the board end portion in the transfer direction in one of the electronic component mounting machines;

a stopping step for stopping the board at the mounting position in response to the detection signal from the board sensor in a subsequent stage electronic component mounting machine arranged subsequent to the one of the electronic component mounting machines; and

correcting and mounting step for correcting a mounting coordinate on which the electronic component is to be mounted based on the extended length of the electronic component and mounting the electronic component on the board in the subsequent stage electronic component mounting machine.