To prevent the lowering of the durability of a door in a mounting section, and to attain a mounted state having high quality by fixing a drawing plate installed on the lever mounting-hole side and a latch case by a screw.
In a tubular type lock, a latch mounting hole 1b formed on the door 1 side and a lever mounting hole 1c cross at a right angle with a door surface 1d and penetrated to a door 1 in a semicircular shape are formed so as to mutually cross. A flange section 5b larger than the internal dimensions of the latch mounting hole 1b is formed at a rear end section in the direction of insertion of a latch case 5. A drawing plate 7 is disposed onto a surface on the side in the inserted direction of the latch case 5 in the lever mounting hole 1c so as to cross the inner circumferential surface with the latch mounting hole 1b. The drawing plate 7 and the latch case 5 are fixed by female screw sections 7a, 7a and screws 8, 8 so as to hold the latch mounting hole 1b.
OGUCHI MASAAKI
YOKOTA SHINTARO
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