SUPPORT PRESSURE CONTROL MECHANISM IN SUPPORT PRESSURE ADJUSTING TYPE BODY SUPPORTING DEVICE

摘要

PURPOSE:To prevent support bodies from dropping and average the actions of the support bodies by using a control means to operate a pressure sensor for scanning at the renewal of operating conditions so as to extract support bodies with support pressures higher than predetermined pressure, and actuating a drive means at the next renewal when there are no adjacent support bodies with support pressures higher than the predetermined pressure. CONSTITUTION:The body of a patient is supported by the body supporting face of each of a number of elastic supporting bodies 4. A control means 16 measures support pressure corresponding to each support body 4 using a pressure sensor 15 and renews operating conditions every predetermined time. The support pressure of each support body 4 is first scanned and those support bodies 4 which show support pressures higher than predetermined pressure are extracted. The control means 16 judges whether or not those support bodies 4 which are adjacent one another in the longitudinal and cross direction and which have already been scanned are selected, and switches to a selected state only if they are not selected, and operates a drive means at the next renewal. Therefore, those support bodies 4 which are adjacent one another in the longitudinal and cross directions are not allowed to fall simultaneously, thus preventing generation of a dent that could occur when those support bodies fall simultaneously. When allowed to drop each support body 4 its support pressure is lowered and is not therefore extracted at the next renewal and those support bodies 4 which have been extracted but not selected at the previous renewal are selected so as to average the actions of the support bodies 4.