Ishida Co. Limited

Hiroaki Morinaka

Yoshihiro Nakamura

Nobutaka Tsujiuchi

Takayuki Koizumi

An electromagnetically driven transport device includes a transport unit for transporting an article M to be transported, an electromagnetically driven vibrating unit for vibrating the transport unit to transport the article, a frequency controlling unit , a time detecting unit and a frequency setting unit . The frequency controlling unit controls a driving frequency of a driving power source of the vibrating unit . The time detecting unit detects a time length T during which when the driving frequency is changed the driving current of the vibrating unit at each of frequency exceeds a reference current value. The frequency setting unit is operable to set an actual driving frequency based on the time length T detected by the time detecting unit

Electromagnetically driven transport device and weighing apparatus using the same

A plurality of trough displacement characteristics and drive signals for driving a drive unit for a trough are determined in association with each other and the speed of transport of the articles M transported by the trough having one of the trough displacement characteristics is also determined. Accordingly, a plurality of relationships between the transport speed of the articles M and the drive signal of the drive unit can be determined and, based on these relationships and merely by inputting a target speed to be attained by the articles M, the drive signal for the drive unit can easily be selected which enables the speed of transport of the articles M to attain the target speed. Also, since a travel quantity characteristics indicative of a correspondence between the quantity of travel of the articles and the driving time of the trough with respect to each of parameters of the plural coefficients of kinetic friction &mgr; is determined, the quantity of travel of the articles M with respect to the driving time of the trough can be grasped with respect to the plural coefficients of kinetic friction &mgr; taken as a parameter. Based on this, the coefficient of kinetic friction &mgr; between the desired trough and the articles M can easily be obtained from the quantity of travel of the articles measured by actually driving the trough for a predetermined time to transport the article M.

Linear conveyor and method for controlling the same

To provide a compact vibrating transport apparatus in which the amount of an article M to be transported can be controlled highly accurately, the vibrating transport apparatus is designed to transport the article M loaded on a trough by vibrating the trough in a predetermined vibrating direction. The apparatus includes strain gauges to mounted on a portion of the transport apparatus where elastic strains are developed upon placement of the article M on the trough , and a weight detecting circuit for detecting the weight W of the article M placed on the trough on the basis of the amount of the strains detected by the strain gauges to

Vibrating transport apparatus and method of detecting vibration characteristic

A heat sealer capable of providing a high sealing strength by appropriating a distribution of temperature at two sheet contact faces (,) includes a block (,) made of a metallic material having a high rigidity and operable to heat the resinous sheet (S) while pressing the latter. The block (,) is provided with heaters (,) therein and also with heat conducting members (,) each having an excellent heat conductive characteristic higher than that of the metallic material. The heat conducting members (,) are positioned between the heaters (,) and the sheet contact faces (,), respectively.

Growing community of inventors

Ritto, Japan

Hiroaki Morinaka