| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized and inexpensive heat treatment apparatus which is excellent in thermal efficiency. SOLUTION: This apparatus is provided with a heat treatment chamber R in a furnace, is formed with an opening through which the heat treatment chamber R and the outside of the furnace are made to communicate with each other on the furnace wall and is provided with a supporting base 3 having a plurality of loading positions for the materials to be treated for supporting the plurality of materials P to be treated apart vertically spaced intervals in the heat treatment chamber R. The apparatus is so formed that the width of the opening of the furnace wall is wider than the width of the materials P to be treated and that the upper edge of the opening of the furnace wall exists upper than the uppermost loading positions for the materials to be treated and the lower edge of the opening of the furnace wall exists lower than the lowermost loading positions for the materials to be treated. The outside of the furnace is provided with a closeout member 5 for closing out the opening of the furnace wall. The closeout member 5 is constituted by lining up a plurality of vertically freely movable component members 5a one above the other. At least one among the plural component members 5a moves vertically, by which part of the opening is opened and the materials P to be treated are carried in and out.
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