JPS6267973U

JPS6267973U -

Info

Publication number: JPS6267973U
Application number: JP1985160244U
Authority: JP
Priority date: 1985-10-18
Filing date: 1985-10-18
Publication date: 1987-04-28

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示すものであり、第
１図は生コンクリート圧送用ポンプの概略構造を
示す側面図、第２図及び第３図はその動作説明図
、第４図はピストンとコンクリートシリンダの組
付構成を示す要部断面図、第５図はシールパツキ
ンの形状例を示す斜視図、第６図はシールパツキ
ンの詳細構造を示す要部拡大断面図である。１，１ａ…コンクリートシリンダ、２…摺動板
、４…供給管、５…吐出管、６，６ａ，７，７ａ
…ピストン、８，８ａ…ピストンロツド、１０…
油圧シリンダ、１１…固定板、１４，１４ａ…油
圧シリンダ、１６…シールパツキン、１６ｂ，１
６ｃ…ひれ状当接部、２０，２１…円周溝。 The drawings show one embodiment of the present invention; Fig. 1 is a side view showing the schematic structure of a pump for pumping fresh concrete, Figs. 2 and 3 are explanatory diagrams of its operation, and Fig. 4 shows the piston and 5 is a perspective view showing an example of the shape of the seal packing, and FIG. 6 is an enlarged sectional view of the main part showing the detailed structure of the seal packing. 1, 1a... Concrete cylinder, 2... Sliding plate, 4... Supply pipe, 5... Discharge pipe, 6, 6a, 7, 7a
... Piston, 8, 8a... Piston rod, 10...
Hydraulic cylinder, 11... Fixed plate, 14, 14a... Hydraulic cylinder, 16... Seal packing, 16b, 1
6c...Fin-like contact portion, 20, 21...Circumferential groove.

Claims

[Scope of utility model registration request]

A piston slidably fitted along the inner wall of a concrete cylinder, a rod connected to the piston, and a seal fixed to the tip of the piston to maintain liquid tightness between the piston and the inner wall of the cylinder. In a plunger-type concrete pump having a sealing pad, one or more fin-shaped contact portions are formed at a portion where the sealing pad comes into contact with the inner wall of the concrete cylinder, and at least one fin-shaped contact portion is formed in the vicinity of at least one of the fin-shaped contact portions. A seal gasket for a plunger type concrete pump characterized by forming a circumferential groove.