JPH0367772U

JPH0367772U -

Info

Publication number: JPH0367772U
Application number: JP12634489U
Authority: JP
Priority date: 1989-10-26
Filing date: 1989-10-26
Publication date: 1991-07-02

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例であるダストカバー
装置が使用されているシリンダ装置を示す縦断面
図、第２図は第１図の−線に沿う断面図であ
る。１０……ダストカバー装置、１１……シリンダ
本体（被包物）、１２……ピストン、１３……プ
ツシユロツド、１４……ダストカバー、１５……
シリンダ室、１６……円筒形状部、１７……中空
部、１８……ボス部、１９……ダストカバー嵌着
用環状溝、２０……連通路用環状溝、２１……連
絡用長溝（内側連絡路）、２２……バンド部、２
３……囲い部、２４……小孔（外側連絡路）、２
５……バンド部、２６……小径部、２７……被包
空間。 FIG. 1 is a longitudinal sectional view showing a cylinder device in which a dust cover device according to an embodiment of the present invention is used, and FIG. 2 is a sectional view taken along the line - in FIG. DESCRIPTION OF SYMBOLS 10...Dust cover device, 11...Cylinder body (envelopment), 12...Piston, 13...Push rod, 14...Dust cover, 15...
Cylinder chamber, 16... Cylindrical part, 17... Hollow part, 18... Boss part, 19... Annular groove for dust cover fitting, 20... Annular groove for communication passage, 21... Long groove for communication (inner communication Road), 22...Band Department, 2
3...Enclosure, 24...Small hole (outer communication path), 2
5...band part, 26...small diameter part, 27...covered space.

Claims

[Scope of utility model registration request]

In a dust cover device in which a band portion formed at one end of the dust cover is fitted onto an object to be covered, an annular groove is recessed between mating surfaces of the object to be covered and the band portion; The envelope and the band portion include an inner communication path that communicates between the inside of the annular groove and the inside of the envelope space of the dust cover, and an inner communication path that communicates between the inside of the annular groove and the outside of the envelope space of the dust cover. A dust cover device characterized in that the outer communication passages are arranged and formed so as to be spaced apart from each other in the circumferential direction.