Bulk feeder and parts supply control system

Patent metadata

Field	Value
Publication number	US-12376273-B2
Application number	US-202118262476-A
Country	US
Kind code	B2
Filing date	Jan 29, 2021
Priority date	Jan 29, 2021
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

A bulk feeder includes a feeder main body, a track member provided vibratably with respect to the feeder main body and formed with a conveyance path through which multiple components are conveyed, an excitation device configured to apply vibration to the track member so that the multiple components are conveyed along the conveyance path, and a vibration sensor configured to detect a vibration value indicating a vibration state of the track member that vibrates by the excitation of the excitation device.

First claim

The invention claimed is:

1. A component supply control system comprising:
a bulk feeder comprising:
a feeder main body,
a track member provided vibratably with respect to the feeder main body and formed with a conveyance path through which multiple components are conveyed,
an excitation device configured to apply vibration to the track member so that the multiple components are conveyed along the conveyance path, and
a vibration sensor configured to detect a vibration value indicating a vibration state of the track member that vibrates by the excitation of the excitation device;

a frequency specifying section configured to specify a natural frequency of a vibrating body including the track member based on a result detected by the vibration sensor; and
a conveyance control section configured to control a conveying operation of the component in the bulk feeder based on a result specified by the frequency specifying section.

2. The component supply control system according to claim 1 , wherein the excitation device includes a support member configured to support the track member and a vibrator provided in the support member and configured to vibrate according to power supplied thereto,
the vibration sensor is provided in the support member and detects an amplitude of an actual vibration of the track member as the vibration value, and
the frequency specifying section causes the excitation device to apply vibrations of multiple types of frequencies different from each other to the track member, respectively, and sets a number of vibrations when the amplitude of the track member detected by the vibration sensor becomes maximum as the natural frequency.

3. The component supply control system according to claim 2 , wherein the support member includes a forward movement support member used for forward conveyance for conveying the component to a front side of the conveyance path and a rearward movement support member used for rearward conveyance for conveying the component to a rear side of the conveyance path,
the vibrator and the vibration sensor are provided in each of the forward movement support member and the rearward movement support member, and
the frequency specifying section causes the excitation device to apply vibrations corresponding to the front-side conveyance and the rear-side conveyance to the track member, respectively, and specifies two types of natural frequencies used in conveying operations of the front-side conveyance and the rear-side conveyance, respectively.

4. The component supply control system according to claim 2 , further comprising a calibration section configured to adjust power supplied to the vibrator based on the natural frequency specified by the frequency specifying section and acquire power supplied to the vibrator when the track member vibrates at the natural frequency.

5. The component supply control system according to claim 1 , wherein when a power supply is applied to the bulk feeder, when a predetermined time elapses from a time when the power supply is applied to the bulk feeder, or when the conveying operation of the component by the bulk feeder exceeds a predetermined number of times, the frequency specifying section specifies the natural frequency.

6. The component supply control system according to claim 1 , wherein the frequency specifying section executes at least some of specific processing for specifying the natural frequency during a period in which a board is carried in or out of a component mounter for mounting the component supplied by the bulk feeder on the board.

7. The component supply control system according to claim 1 , wherein the conveyance control section performs control such that a vibration of the natural frequency specified by the frequency specifying section is applied to the track member, in the conveying operation of the component in the bulk feeder.

8. The component supply control system according to claim 1 , wherein the excitation device includes a support member configured to support the track member, and a vibrator provided in the support member and configured to vibrate according to power supplied thereto, and
the vibration sensor is provided in the support member, and detects a frequency or an amplitude of an actual vibration of the track member as the vibration value.

Assignees

• Fuji Corp

Inventors

• Yamazaki Yusuke
• Nonomura Toshihiro
• Kawasaki Yuji

Classifications

• H05K13/043 Primary

  Feeding one by one by other means than belts · CPC title

• B65G27/32

  with means for controlling direction, frequency or amplitude of vibration or shaking movement · CPC title

• B65G47/16

  for feeding materials in bulk · CPC title

• H05K13/028 Primary

  Simultaneously loading a plurality of loose objects, e.g. by means of vibrations, pressure differences, magnetic fields · CPC title