JPS62120597U

JPS62120597U -

Info

Publication number: JPS62120597U
Application number: JP725986U
Authority: JP
Priority date: 1986-01-23
Filing date: 1986-01-23
Publication date: 1987-07-31

Description

[Brief explanation of the drawing]

第１図ないし第３図は本考案の一実施例を示し
、第１図は本考案による中折機構の油圧回路図、
第２図は第１図の中折機構を備えたシールド折進
機の縦断面図、第３図はシールドジヤツキおよび
中折ジヤツキの配置を示す正面図である。１……シールド本体、１Ａ……前部シールド、
１Ｂ……後端シールド、２ａ〜２ｆ……中折ジヤ
ツキ、３……シールドジヤツキ、１０……クロー
ズド回路、１１……ストツプ弁、１２……オープ
ン回路、１３……ストツプ弁。 1 to 3 show an embodiment of the present invention, and FIG. 1 is a hydraulic circuit diagram of the center folding mechanism according to the present invention;
FIG. 2 is a longitudinal sectional view of the shield folding machine equipped with the folding mechanism shown in FIG. 1, and FIG. 3 is a front view showing the arrangement of the shield jack and the folding jack. 1...Shield body, 1A...Front shield,
1B... Rear end shield, 2a to 2f... Center folding jack, 3... Shield jack, 10... Closed circuit, 11... Stop valve, 12... Open circuit, 13... Stop valve.

Claims

[Scope of utility model registration request]

The shield main body is divided into a front shield and a rear shield, the front shield is made bendable relative to the rear shield, and the front shield and rear shield are connected by a plurality of folded jacks. In a shield excavator comprising a plurality of shield jacks for propelling a shield body inside, a circuit communicating between the rod side of each of the folding jacks and the head side of each of the folding jacks is connected. 1. A mid-folding mechanism for a shield excavator, comprising: a circuit, the one of the two circuits that is subject to a load is a closed circuit, and the other circuit is an open circuit.