| 摘要 |
PURPOSE:To prevent thermal deformation at the section of metal contact in a front plate and the leakage of oil, vapor and hot air by making the front end section of a heating chamber upper plate U-shaped to abut and fix to a front plate and at the same time bracing an area larger than the section of metal contact with a door by a U-shaped face. CONSTITUTION:The upper face plate 9 on the upper face of a heating chamber 1 has its front end section worked by bending in U-shape, and it is fixed to a front face plate 3 which constitutes the surrounding of a front face opening section of the heating chamber 1 and at the same time constitutes part of a door 7. A metal contact section with the metal plate 6 of the door which makes metal contact with the surrounding of the opening section of the heating chamber 1 is braced with a larger U-shaped face. Furthermore, a reinforcing rib 10 at the flat surface section of the upper face plate 9 and triangular ribs 11 at the bent sections are provided to increase strength. With this arrangement thermal deformation at the metal contact section of the front face plate 3 is prevented and also leakage of steam and hot air due to the rise of the door 7 is prevented.
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