| 摘要 |
PURPOSE:To guide the corn smoothly and facilitate severance of the joint by fitting the end of one of the upper or lower cylinders sideways into that portion of the other cylinder joint end where the external sides are open, and by covering the open portion with a lid so made as capable of opening and shutting. CONSTITUTION:One of the side walls 1 of a lower cylinder 3 is screwed fast to the flange part 17 of the other three sides in such a way as separable. An open part 4 is provided in the upper joint part 19 of this cylinder in its extent from the outside to the upper and lower sides 21, 22. The flange part 17 of upper cylinder 2 is screwed fast to the side wall 1 in the same manner as with cylinder 3, and an open part 4 is formed in the extent from the outside to the upper and lower sides 22, 23. These open parts 4 constitute a consolidated hatch if the upper and lower cylinders 2, 3 are fitted in each other. A lid 5 fixed rotatably to the outside of the cylinder 3 is to cover said open parts 4 as penetrating the cylinders 2, 3, and its top is fixed separably to the outside of the cylinder 2. Accordingly the joint end 19 of the cylinder 3 can be fitted sideways in the open part 4 of the cylinder 2.
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