WE CLAIM:
1. A worker management apparatus comprising:
a worker information collection device worn by a worker, the worker information collection device comprising:
a vital sign information measuring unit to collect time-series vital sign information on the worker during work; and
an action information collection unit to collect work information including work content of work performed by the worker and including a work start date and time and a work end date and time when the worker performs the work; and
a workload information management device capable of communicating with the worker information collection device, the workload information management device comprising:
a vital sign information accumulation unit to accumulate the time-series vital sign information;
an action history accumulation unit to accumulate action information in which worker information indicating a worker who performs the work and the work information are associated with each other;
an action segment extraction unit to divide a series of actions of the work recorded in the work information into a plurality of action scenes on a basis of a change in content of the action in a series of actions of the work performed by the worker, and to extract the action scenes;
a per-scene load calculation unit to calculate a workload value that is an estimate of a workload on the worker in the action scene on a basis of the time-series vital sign information from start time to end time of an action of the worker in the action scene extracted by the

action segment extraction unit;
a per-scene load accumulation unit to accumulate the worker information, scene information for identifying the action scene, and the workload value for the action scene that are associated with one another; and
a multiple people load comparison unit to compare the workload value for one of the action scenes with the workload value of a plurality of people that is accumulated in the per-scene load accumulation unit and associated with same scene information as the scene information on the one of the action scenes and to determine whether the workload value for the one of the action scenes is higher than a predetermined condition.
2. The worker management apparatus according to claim 1,
comprising:
a display unit to display information on a worker whose workload value for the action scene is higher than the predetermined condition on a basis of a result of determination by the multiple people load comparison unit.
3. The worker management apparatus according to claim 2,
comprising:
a worker load information viewing device to accept instruction information instructing a worker whose workload value for the action scene is higher than the predetermined condition to reduce a load and to transmit the instruction information to the workload information management device, the worker load information viewing device including the display unit, wherein
the workload information management device receives the instruction information and transmits the instruction information to the worker information collection device of

the worker whose workload value for the action scene is higher than the predetermined condition, and
the worker information collection device receives the instruction information and displays the instruction information on a display unit.
4. The worker management apparatus according to any one
of claims 1 to 3, wherein
the action information collection unit further collects position information identifying a position of a worker,
the action history accumulation unit further accumulates the position information, and
the action segment extraction unit divides, on a basis of the action information, a series of actions of the work into the plurality of action scenes in accordance with a change in content of the action in a series of actions of the work performed by the worker and the position information accumulated in the action history accumulation unit, and extracts the action scenes.
5. The worker management apparatus according to any one
of claims 1 to 3, comprising:
an external information collection device to measure external information indicating an environmental condition of a site where the worker performs work, wherein
the workload information management device comprises an external information accumulation unit to accumulate the external information, and
the action segment extraction unit divides, on a basis of the action information, a series of actions of the work into the plurality of action scenes in accordance with a change in content of the action in a series of actions of

the work performed by the worker and the external information accumulated in the external information accumulation unit, and extracts the action scenes.