Feeder operation inspection device

Patent metadata

Field	Value
Publication number	US-12304746-B2
Application number	US-201917640266-A
Country	US
Kind code	B2
Filing date	Sep 6, 2019
Priority date	Sep 6, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A feeder operation inspection device includes an image processing section configured to deduce a position of a brightness change point group, which is a set of brightness change points where an amount of change in brightness relative to a periphery in an image datum is equal to or larger than a specified value, for each of multiple image data, a calculating section configured to calculate an actual conveyance amount of a carrier tape which is actually conveyed through a conveyance process based on the position of the brightness change point group of each of the multiple image data, and a determination section configured to determine whether the feeder operates normally in the conveyance process based on a designated conveyance amount and an actual conveyance amount in the conveyance process.

First claim

The invention claimed is:

1. A feeder operation inspection device for a feeder for conveying a carrier tape,
the feeder executing a conveyance process for conveying the carrier tape by a designated conveyance amount, the feeder operation inspection device comprising:
a storage device configured to store multiple image data obtained by causing the carrier tape to be imaged by a camera at multiple different timings during execution of the conveyance process;
an image processing section configured to deduce a position of a brightness change point group, which is a set of brightness change points where an amount of change in brightness relative to a periphery in the image data is equal to or larger than a specified value, for each of the multiple image data;
a calculating section configured to calculate an actual conveyance amount of the carrier tape which is actually conveyed through the conveyance process based on the position of the brightness change point group of each of the multiple image data; and
a determination section configured to determine whether the feeder operates normally in the conveyance process based on the designated conveyance amount and the actual conveyance amount in the conveyance process.

2. The feeder operation inspection device according to claim 1 ,
wherein the brightness change point group is an occupied area of a predetermined surface area in the image data or an occupied area comprising a predetermined number of pixels in the image data.

3. The feeder operation inspection device according to claim 1 ,
wherein the brightness change point group corresponds to at least a part of a characteristic section of the carrier tape.

4. The feeder operation inspection device according to claim 3 ,
wherein the characteristic section of the carrier tape is at least either of feeding holes and component accommodating cavities which are both formed in the carrier tape at equal intervals in a conveyance direction of the carrier tape.

5. The feeder operation inspection device according to claim 1 ,
wherein the storage device stores the image data of three or more which are obtained through multiple times of imaging during execution of the conveyance process,
wherein the image processing section deduces a position of the brightness change point group for each of the image data of three or more, and
wherein the calculating section calculates a partial actual conveyance amount of the carrier tape at an imaging interval defined between any two image data of the image data of three or more based on the position of the brightness change point group deduced for each of the image data of three or more.

6. The feeder operation inspection device according to claim 5 ,
wherein the determination section determines whether the feeder operates normally based on a partial designated conveyance amount of the carrier tape at each of intervals defined over multiple times of imaging during execution of the conveyance process and the partial actual conveyance amount calculated by the calculating section.

7. The feeder operation inspection device according to claim 1 ,
wherein the feeder comprises:
a main body section; and
a sprocket provided rotatably on the main body section and configured to be brought into engagement with feeding holes formed in the carrier tape at equal intervals in a conveyance direction of the carrier tape,
wherein when a difference between the designated conveyance amount and the actual conveyance amount in the conveyance process is out of an allowable range, the determination section determines that the feeder operates abnormally due to at least either of an engagement failure between the sprocket and the feeding holes and a rotational operation failure of the sprocket.

8. The feeder operation inspection device according to claim 1 ,
the feeder operation inspection device being applied to a tape installation device for assisting in installing or automatically installs the carrier tape in the feeder,
wherein the multiple image data are obtained by imaging the carrier tape by the camera provided on the tape installation device exclusively to image the carrier tape installed in the feeder.

9. The feeder operation inspection device according to claim 1 ,
the feeder operation inspection device being applied to a component mounter for mounting a component on a board,
wherein the component mounter comprises:
a mounting head configured to pick up the component supplied by the feeder and mount the component so picked up on the board; and
a board camera provided so as to move together with the mounting head and configured to image the board, and
wherein the multiple image data are obtained through imaging by the board camera which is moved so as to image the carrier tape which is installed in the feeder for supplying the component.

Assignees

• Fuji Corp

Inventors

• Kito Shuichiro

Classifications

• B65G2203/041

  Camera · CPC title

• G06T7/73

  using feature-based methods · CPC title

• G06T7/246

  using feature-based methods, e.g. the tracking of corners or segments · CPC title

• H05K13/081

  Integration of optical monitoring devices in assembly lines; Processes using optical monitoring devices specially adapted for controlling devices or machines in assembly lines · CPC title

• B65G43/10 Primary

  Sequence control of conveyors operating in combination · CPC title