Patents by Inventor Masaya Kitazawa
Masaya Kitazawa 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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Patent number: 11530565Abstract: An elevator car door apparatus includes a door frame, a door motor, a motor pulley, a reduction pulley, a first driving pulley, a second driving pulley, a reduction belt, and a driving belt. The door motor, the reduction pulley, and the first driving pulley are supported on the door frame by means of a unit supporting member. The unit supporting member includes a flat plate portion that is placed on a frame vertical surface of the door frame. The reduction pulley and the first driving pulley are rotatable around a fixed shaft that is fixed so as to be perpendicular to the flat plate portion.Type: GrantFiled: May 22, 2018Date of Patent: December 20, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Shogo Morinaga, Masaya Kitazawa
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Publication number: 20200362613Abstract: An elevator car door apparatus includes a door frame, a door motor, a motor pulley, a reduction pulley, a first driving pulley, a second driving pulley, a reduction belt, and a driving belt. The door motor, the reduction pulley, and the first driving pulley are supported on the door frame by means of a unit supporting member. The unit supporting member includes a flat plate portion that is placed on a frame vertical surface of the door frame. The reduction pulley and the first driving pulley are rotatable around a fixed shaft that is fixed so as to be perpendicular to the flat plate portion.Type: ApplicationFiled: May 22, 2018Publication date: November 19, 2020Applicant: Mitsubishi Electric CorporationInventors: Shogo MORINAGA, Masaya KITAZAWA
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Patent number: 10207900Abstract: In an elevator car door apparatus, a locking member is disposed on a blade-carrying car door, and is displaceable between an unlocked position and a locked position interdependently with movement of a doorstop-side blade. A guiding portion is disposed on the locking member. A guiding cam is disposed outside the blade-carrying car door. When the car is positioned outside an appropriate floor alignment position, the blade-carrying car door moves in an opening direction, the guiding portion moves along the guiding cam, the locking member displaces to the locked position, and the doorstop-side blade also displaces to a locking accommodating position, the locking member catches in a fixed latch, and movement of the blade-carrying car door in the opening direction is prevented.Type: GrantFiled: October 15, 2014Date of Patent: February 19, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventor: Masaya Kitazawa
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Publication number: 20170217732Abstract: In an elevator car door apparatus, a locking member is disposed on a blade-carrying car door, and is displaceable between an unlocked position and a locked position interdependently with movement of a doorstop-side blade. A guiding portion is disposed on the locking member. A guiding cam is disposed outside the blade-carrying car door. When the car is positioned outside an appropriate floor alignment position, the blade-carrying car door moves in an opening direction, the guiding portion moves along the guiding cam, the locking member displaces to the locked position, and the doorstop-side blade also displaces to a locking accommodating position, the locking member catches in a fixed latch, and movement of the blade-carrying car door in the opening direction is prevented.Type: ApplicationFiled: October 15, 2014Publication date: August 3, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Masaya KITAZAWA
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Patent number: 9656835Abstract: In an elevator car door locking apparatus, a doorstop-side blade is disposed on a car door by a linking mechanism, and is displaceable horizontally between a locked position, and an unlocked position that is further away from a door pocket than the locked position. A balance weight is disposed on an opposite side of the pivoting shaft of the link from the doorstop-side blade. The doorstop-side blade comes into contact with a landing door engaging member and displaces, and the balance weight also displaces away from the doorstop-side blade, due to the car door moving toward the door pocket side when a car is in position at a floor.Type: GrantFiled: July 19, 2013Date of Patent: May 23, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventor: Masaya Kitazawa
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Publication number: 20160130116Abstract: In an elevator car door locking apparatus, a doorstop-side blade is disposed on a car door by a linking mechanism, and is displaceable horizontally between a locked position, and an unlocked position that is further away from a door pocket than the locked position. A balance weight is disposed on an opposite side of the pivoting shaft of the link from the doorstop-side blade. The doorstop-side blade comes into contact with a landing door engaging member and displaces, and the balance weight also displaces away from the doorstop-side blade, due to the car door moving toward the door pocket side when a car is in position at a floor.Type: ApplicationFiled: July 19, 2013Publication date: May 12, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Masaya KITAZAWA
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Patent number: 8973714Abstract: A door engagement device for an elevator according to the present invention is configured in such a manner that biasing-force applying/changing means applies a turning preventing force for preventing turning of a lever main body and changes a direction of a biasing force to a direction of an anti-turning preventing force to the lever main body by action of turning guiding means with movement of a car door. Accordingly, an engagement-mechanism driving device can be driven with a reduced space at low cost.Type: GrantFiled: October 6, 2010Date of Patent: March 10, 2015Assignee: Mitsubishi Electric CorporationInventors: Kenji Utsunomiya, Hiroshi Kigawa, Masaya Kitazawa, Naotoshi Ito
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Publication number: 20120118676Abstract: A door engagement device for an elevator according to the present invention is configured in such a manner that biasing-force applying/changing means applies a turning preventing force for preventing turning of a lever main body and changes a direction of a biasing force to a direction of an anti-turning preventing force to the lever main body by action of turning guiding means with movement of a car door. Accordingly, an engagement-mechanism driving device can be driven with a reduced space at low cost.Type: ApplicationFiled: October 6, 2010Publication date: May 17, 2012Applicant: MITSUBISHI ELECTRI CORPORATIONInventors: Kenji Utsunomiya, Hiroshi Kigawa, Masaya Kitazawa, Naotoshi Ito