To provide a joint structure of lumber which is excellent in tensile proof stress, and which has an advantage for the construction of a large-scale wooden building by the use of lumber.
The flat end surfaces 1402 of the ends of each of the two pieces of lumber 14 are confronted with each other, and a metal sheet 36 is put together on the side 1422 of the lumber 14. Then a projection 38 is inserted to a recess 1424. Because of this, the flat end surfaces 1402 of the ends of the two pieces of lumber 14 are joined to each other in a state that they are maintained by being confronted with each other. The projection 38 is constituted by a cylindrical wall having a cylindrical surface of smaller outer diameter than the inner diameter of the recess 1424, and a taper part is formed at the tip of the cylindrical wall. The outer diameter of the taper part becomes smaller toward its tip. Then the projection 38 is fixed to the metal sheet 36 with a pitch of which the dimension is smaller than that of the pitch of the recess 1424 formed in each of the lumber 14 in a state that the flat end surfaces 1402 of the ends of the two pieces of lumber 14 are confronted with each other.
TAKESHITA KENJIRO
AZUMA YASUKI
YODA SADAKAZU
KATO TOSHIYUKI
SAKAKURA KENCHIKU KENKYUSHO KK
O R S JIMUSHO KK
KATO CO LTD T
| JPS54177016U | 1979-12-14 | |||
| JP16000423Y | ||||
| JPH06158735A | 1994-06-07 | |||
| JPH11286995A | 1999-10-19 | |||
| JPS56114201U | 1981-09-02 | |||
| JPS5328913A | 1978-03-17 | |||
| JP18011119Y |
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