JP2006218585A5 - - Google Patents

Claims (3)

A housing that defines a pressure accumulating chamber for storing compressed air;
A cylindrical cylinder provided in the housing;
A piston provided in the cylinder so as to be reciprocally slidable;
A driver blade fixed integrally or separately to the lower surface of the piston, extending from the lower surface of the piston to the outside lower part of the cylinder at the bottom dead center of the piston, and striking a nail by the reciprocating motion of the piston;
An air passage from the piston upper chamber to the pressure accumulating chamber or the air passage to the atmosphere, which is provided so as to be vertically movable with respect to the upper peripheral edge of the cylinder and is partitioned by a wall portion including the upper surface of the piston, is alternatively selected. A head valve to be formed;
An elastic material provided at an upper portion of the cylinder, and forms an air passage from the piston upper chamber to the atmosphere in cooperation with the head valve by contacting or non-contacting with the vertical movement of the head valve. An exhaust valve rubber consisting of
An exhaust cover that is integrally formed with the housing at an upper portion of the cylinder, and that includes a head valve compartment for housing the head valve, a mounting portion for mounting the fixing portion of the exhaust valve rubber, and an exhaust hole communicating with the atmosphere; In a nailing machine having
The mounting portion of the exhaust cover has a guide hole portion having a first diameter penetrating from the lower surface of the flat plate portion of the exhaust cover to the upper surface, and the fixing portion of the exhaust valve rubber has the first diameter. A columnar guide diameter portion having a second diameter substantially equal to or smaller than the columnar guide diameter portion, and a columnar latching diameter portion having a third diameter larger than the guide diameter portion continuous to the columnar guide diameter portion. Prepared,
By inserting the column-shaped retaining diameter portion of the exhaust valve rubber into the guide hole portion while making it smaller than the exhaust cover guide hole portion, and positioning the guide diameter portion of the exhaust valve rubber within the guide hole portion Hang the exhaust valve rubber on the exhaust cover ,
The guide hole portion of the exhaust cover is disposed on the center axis of the piston, and the front cover
Contact between the center of the piston and the exhaust valve rubber at the top dead center
The part corresponding to the touch surface is separated from the exhaust valve rubber.
Feature nailer.   The guide hole portion of the exhaust cover is a recess disposed on the central axis of the piston.
The guide hole is formed in a flat plate bottom of the recess, and the exhaust
The columnar retaining diameter portion of the valve rubber is housed in the recess.
1. The nailer described in 1.   The exhaust valve rubber surrounds the periphery of the columnar guide diameter part and the hooking diameter part.
As described above, it has a cylindrical wall portion integrally formed with the guide diameter portion and the latching diameter portion,
The exhaust cover is disposed so as to surround the outer peripheral surface of the recess.
The nail driver according to claim 2.