JPH01105694U

JPH01105694U -

Info

Publication number: JPH01105694U
Application number: JP78988U
Authority: JP
Priority date: 1988-01-07
Filing date: 1988-01-07
Publication date: 1989-07-17

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示す中折れ装置
の概略縦断面図、第２図は中折れピンの配置を示
す断面図、第３図は両嵌合ストツパの取り付け、
取り外し構造を示す断面図、第４図は第３図の
―線矢視図、第５図は上方に屈曲した状態を示
す中折れ装置の概略縦断面図、第６図は下方に屈
曲した状態を示す中折れ装置の概略縦断面図、第
７図は従来のシールド掘進機を示す概略縦断面図
、第８図は第７図の―線断面図である。３…前胴、５…後胴、７…ヒンジ、８Ａ…前胴
の接続部材、９Ａ…後胴の接続部材、１０…中折
れピン、１１…中折れジヤツキ、１２…（第１の
）長孔、１４Ａ，１４Ｂ，１４Ｃ…（第１の）嵌
合ストツパ、Ｆ…前方、Ｂ…後方、θ…屈曲角度
。 Fig. 1 is a schematic vertical cross-sectional view of a center-folding device showing an embodiment of this invention, Fig. 2 is a cross-sectional view showing the arrangement of the center-folding pin, and Fig. 3 shows the installation of both fitting stoppers.
4 is a cross-sectional view showing the removal structure; FIG. 4 is a view taken along the line - in FIG. 3; FIG. 5 is a schematic vertical sectional view of the folding device in an upwardly bent state; and FIG. 6 is a downwardly bent state. 7 is a schematic vertical sectional view showing a conventional shield excavator, and FIG. 8 is a sectional view taken along the line -- in FIG. 7. 3...front body, 5...rear body, 7...hinge, 8A...front body connection member, 9A...rear body connection member, 10...center bending pin, 11...center bending jack, 12...(first) length Hole, 14A, 14B, 14C...(first) fitting stopper, F...front, B...backward, θ...bending angle.

Claims

[Claims for Utility Model Registration] A cylindrical front body that supports an excavation cutter, a cylindrical rear body that supports this front body in a swingable manner, and a cylindrical rear body that projects from the front body and the rear body, respectively. A pair of center-folding pins extending in the radial direction and spaced apart by 180 degrees in the circumferential direction are inserted into the pair of connecting members of the front shell and the connecting member of the rear shell, so that the center-folding direction of the front shell is aligned in one plane direction. The inside of a shield excavator, comprising: a hinge for fixing; and a bending jack fixed across the front body and the rear body, for bending the front body relative to the rear body around the center bending pin. In the folding device, there are a plurality of types corresponding to a long hole formed long in the front-rear direction of one of the two connecting members and a plurality of bending angles of the front body in a direction orthogonal to the center folding direction. A corresponding one of the prepared types is a center-folding device for a shield excavator, which has fitting stoppers that fit into gaps set in front and rear of the center-folding pin in the elongated hole.