Safety work device
AssigneeHitachi Industrial Equipment Systems Co., Ltd.
InventorTakeshi Kaneko
Life of this patent
Estimating the term…
Abstract
A safety work device having a plurality of HEPA filters in an exhaust system suppresses leakage of contaminants. The work device includes: a work space; a front shutter covering part of a front opening surface of the work space; a work opening portion below the front shutter, through which a worker puts hands to perform work; a rear port provided at a lower portion of a back surface of the work space to suction air; and an exhaust flow path provided behind the back surface of the work space to exhaust the air in the work space. A first HEPA filter for exhaust is disposed in a vertical direction in the exhaust flow path and behind the rear port, and a second HEPA filter for exhaust is disposed in the vertical direction in the exhaust flow path and on a downstream side of the first HEPA filter.
Claims12
A safety work device comprising:
- a work space;
- a front shutter covering a part of an opening portion of a front surface of the work space;
- a work opening portion below the front shutter, through which a worker puts hands to perform work;
- a rear port provided at a lower portion of a back surface of the work space to suction air in the work space;
- an exhaust flow path provided behind the back surface of the work space to exhaust the air in the work space,
- wherein a first HEPA filter for exhaust is disposed in a vertical direction in the exhaust flow path and behind the rear port, and a second HEPA filter for exhaust is disposed in the vertical direction in the exhaust flow path and on a downstream side of the first HEPA filter;
- and
- a reverse flow path, on an exhaust side of the first HEPA filter, that reverses an intake and exhaust direction toward an intake side of the second HEPA filter along a back of the safety work device.
Dependencies are inferred from the claim text.