Patents by Inventor Koji Akamatsu
Koji Akamatsu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250042665Abstract: An article storage facility includes a first storeroom and a second storeroom with a lower degree of automation than the first storeroom. Article holders are stored in the first and second storerooms. Each article holder holds a single type of article. A control system executes a first unloading process of unloading a target holder, which is an article holder holding articles of an ordered type, from the first storeroom to a retrieval work section; a second unloading process of unloading the target holder from the second storeroom to the retrieval work section if the number of articles held by the target holder unloaded in the first unloading process is smaller than an ordered number, or if the target holder is not present in the first storeroom; and a post-work loading process of transporting the target holder to the first storeroom if any article remains in the target holder after retrieval work.Type: ApplicationFiled: August 2, 2024Publication date: February 6, 2025Inventors: Kenichi Ukisu, Masaki Akamatsu, Koji Hirabayashi, Kouji Fujita
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Publication number: 20250042663Abstract: An article storage facility includes a first storeroom and a second storeroom with a lower degree of automation than the first storeroom. The number of first housing sections in the first storeroom is greater than or equal to a total number of target types, which are types of articles to be stored in the first storeroom, out of the articles of all types to be specified by order information. The number of second housing sections in the second storeroom is greater than the number of first housing sections. A control system executes an unloading process to cause the transport apparatus to unload an article holder holding articles of the ordered type from either the first storeroom or the second storeroom to a retrieval work section such that the first storeroom is given priority over the second storeroom.Type: ApplicationFiled: August 2, 2024Publication date: February 6, 2025Inventors: Kenichi Ukisu, Masaki Akamatsu, Koji Hirabayashi, Kouji Fujita
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Patent number: 6469522Abstract: An electrical discharge state detecting device for an electrical discharge machining machine which detects an electrical discharge state during an electrical discharge machining operation. The detecting device includes a high-pass filter for detecting a high-frequency component superimposed on an electrical discharge voltage or an electrical discharge current at a machining clearance between an electrode and a workpiece, a rectifying circuit for outputting a rectified component of the high-frequency component, a first integration circuit for integrating the rectified component, a reference voltage circuit, a second integrating circuit for integrating the reference voltage, a comparator for comparing the two integrated values, an electrical discharge generation detecting circuit for controlling starting and ending of the integrating circuits, a logic circuit, and a delay circuit and reset circuits.Type: GrantFiled: January 23, 2001Date of Patent: October 22, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Koji Akamatsu
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Patent number: 6359448Abstract: An electrical discharge state detecting device for an electrical discharge machining machine which detects an electrical discharge state during an electrical discharge machining operation. The detecting device includes a high-pass filter for detecting a high-frequency component superimposed on an electrical discharge voltage or an electrical discharge current at a machining clearance between an electrode and a workpiece, a rectifying circuit for outputting a rectified component of the high-frequency component, a first integration circuit for integrating the rectified component, a reference voltage circuit, a second integrating circuit for integrating the reference voltage, a comparator for comparing the two integrated values, an electrical discharge generation detecting circuit for controlling starting and ending of the integrating circuits, a logic circuit, and a delay circuit and reset circuits.Type: GrantFiled: January 23, 2001Date of Patent: March 19, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Koji Akamatsu
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Publication number: 20010003425Abstract: An electrical discharge state detecting device for an electrical discharge machining machine which detects an electrical discharge state during an electrical discharge machining operation. The detecting device includes a high-pass filter for detecting a high-frequency component superimposed on an electrical discharge voltage or an electrical discharge current at a machining clearance between an electrode and a workpiece, a rectifying circuit for outputting a rectified component of the high-frequency component, a first integration circuit for integrating the rectified component, a reference voltage circuit, a second integrating circuit for integrating the reference voltage, a comparator for comparing the two integrated values, an electrical discharge generation detecting circuit for controlling starting and ending of the integrating circuits, a logic circuit, and a delay circuit and reset circuits.Type: ApplicationFiled: January 23, 2001Publication date: June 14, 2001Inventor: Koji Akamatsu
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Publication number: 20010002104Abstract: An electrical discharge state detecting device for an electrical discharge machining machine which detects an electrical discharge state during an electrical discharge machining operation. The detecting device includes a high-pass filter for detecting a high-frequency component superimposed on an electrical discharge voltage or an electrical discharge current at a machining clearance between an electrode and a workpiece, a rectifying circuit for outputting a rectified component of the high-frequency component, a first integration circuit for integrating the rectified component, a reference voltage circuit, a second integrating circuit for integrating the reference voltage, a comparator for comparing the two integrated values, an electrical discharge generation detecting circuit for controlling starting and ending of the integrating circuits, a logic circuit, and a delay circuit and reset circuits.Type: ApplicationFiled: January 23, 2001Publication date: May 31, 2001Inventor: Koji Akamatsu
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Patent number: 6208150Abstract: An electrical discharge state detecting device for an electrical discharge machining machine which detects an electrical discharge state during an electrical discharge machining operation. The detecting device includes a high-pass filter for detecting a high-frequency component superimposed on an electrical discharge voltage or an electrical discharge current at a machining clearance between an electrode and a workpiece, a rectifying circuit for outputting a rectified component of the high-frequency component, a first integration circuit for integrating the rectified component, a reference voltage circuit, a second integrating circuit for integrating the reference voltage, a comparator for comparing the two integrated values, an electrical discharge generation detecting circuit for controlling starting and ending of the integrating circuits, a logic circuit, and a delay circuit and reset circuits.Type: GrantFiled: May 5, 1998Date of Patent: March 27, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Koji Akamatsu
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Patent number: 5801352Abstract: A power supply unit for a discharge machining apparatus which eliminates overshooting in current rise and improves the electrode consumption characteristics by preventing an operational amplifier as well as a current control element from being saturated, thereby eliminating overshooting during the rise time of the machining current, by clamping the output voltage of the operational amplifier during the stand-by time for electric discharge. The output is clamped by a plurality of resistors and diodes to a state where the output voltage is higher than a power-supply voltage (the output clamp level is set by a resistor). Namely, during the stand-by time when inverted amplification (feedback) via a resistor in an operational amplifier is being carried out, a constant state of feedback is maintained by the diodes.Type: GrantFiled: September 8, 1995Date of Patent: September 1, 1998Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Engineering Co., Ltd.Inventors: Atsushi Taneda, Koji Akamatsu, Hajime Ogawa, Satoshi Suzuki
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Patent number: 5751155Abstract: An electrical discharge state detecting device for an electrical discharge machining machine which detects an electrical discharge state during an electrical discharge machining operation. The detecting device includes a high-pass filter for detecting a high-frequency component superimposed on an electrical discharge voltage or an electrical discharge current at a machining clearance between an electrode and a workpiece, a rectifying circuit for outputting a rectified component of the high-frequency component, a first integration circuit for integrating the rectified component, a reference voltage circuit, a second integrating circuit for integrating the reference voltage, a comparator for comparing the two integrated values, an electrical discharge generation detecting circuit for controlling starting and ending of the integrating circuits, a logic circuit, and a delay circuit and reset circuits.Type: GrantFiled: August 3, 1995Date of Patent: May 12, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Koji Akamatsu
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Patent number: 5383026Abstract: The invention permits determination of the position and/or the configuration of an object by impinging a laser light beam onto the object in a light scattering medium, and detecting the trace of a scattered light beam, by cameras.Type: GrantFiled: April 23, 1992Date of Patent: January 17, 1995Assignees: Naotake Mouri, Mitsubishi Denki Kabushiki KaishaInventors: Naotake Mouri, Koji Akamatsu, Akihiro Goto
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Patent number: 5200905Abstract: An electric discharge machining control apparatus in which the know how of a skilled person can be readily written which concerns the setting of machining conditions such as pause time, discharge duration time, servo reference voltage, and speed gain which are necessary for maintaining optimum electric discharge machining conditions and for offering a maximum electric discharge machining efficiency, as well as the criterions to the instability of electric discharge machining conditions. According to the know how, the machining control is carried out in a most suitable manner, and can be automatically adjusted when required.Type: GrantFiled: August 7, 1990Date of Patent: April 6, 1993Assignee: Mitsubishi Denki K.K.Inventors: Kazuhiko Uemoto, Koji Akamatsu, Nobuaki Ohba
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Patent number: 5047703Abstract: The present invention relates to a motor driving device wherein two motors are held in engagement with an identical spindle through respective torque transmission mechanisms, and wherein each of the motors has a driving amplifier for generating a torque in a direction reverse to that of a torque of the other motor; comprising an integration circuit which integrates with respect to time a difference signal between an angle command value of the spindle and a rotational angle feedback value thereof, and which applies its integral output to the driving amplifiers in common.Type: GrantFiled: October 25, 1989Date of Patent: September 10, 1991Inventor: Koji Akamatsu