JPH0231298U

JPH0231298U -

Info

Publication number: JPH0231298U
Application number: JP11077488U
Authority: JP
Priority date: 1988-08-23
Filing date: 1988-08-23
Publication date: 1990-02-27

Description

[Brief explanation of drawings]

第１図は本考案の実施例の荷役車両のクランプ
装置の斜視図、第２図は同じくその油圧回路を示
す図、第３図は同じくその同期弁の拡大縦断面図
、第４図ａは第３図のＡ―Ａ断面図、第４図ｂは
第３図のＢ―Ｂ断面図、第５図は同じくその両可
動アーム相互間の相対的移動距離が一定値に達し
たときの側面図、第６図ａ，ｂは同じくその両可
動アームの相対的移動距離が一定値に達したとき
の同期弁の状態を示す拡大断面図、第７図は従来
の荷役車両のクランプ装置の斜視図、第８図は同
じくその要部平面図、第９図は同じくその要部側
面図である。１０：基板、１１：固定アーム、１２，１３：
横軸、１４，１５：可動アーム、１６，１７：駆
動シリンダ、１８：油圧回路、１９：同期弁、３
３：外筒、３４：弁スプール、３４ａ：突部、３
４ｂ，３４ｃ：斜面、３５，３６：逆止弁、３５
ａ，３５ｂ，３６ａ，３６ｂ：連通路、３７，３
８：ピン、３９，４０：通路、４１，４２：溜り
部、４３：バイパス路。 Fig. 1 is a perspective view of a clamping device for a cargo handling vehicle according to an embodiment of the present invention, Fig. 2 is a diagram showing the hydraulic circuit thereof, Fig. 3 is an enlarged vertical cross-sectional view of the synchronous valve, and Fig. 4a is a Figure 3 is an AA sectional view, Figure 4b is a BB sectional view in Figure 3, and Figure 5 is a side view when the relative movement distance between both movable arms reaches a certain value. Figures 6a and 6b are enlarged sectional views showing the state of the synchronous valve when the relative movement distance of both movable arms reaches a certain value, and Figure 7 is a perspective view of a conventional clamping device for a cargo handling vehicle. FIG. 8 is a plan view of the main part, and FIG. 9 is a side view of the main part. 10: Board, 11: Fixed arm, 12, 13:
Horizontal axis, 14, 15: Movable arm, 16, 17: Drive cylinder, 18: Hydraulic circuit, 19: Synchronous valve, 3
3: Outer cylinder, 34: Valve spool, 34a: Projection, 3
4b, 34c: slope, 35, 36: check valve, 35
a, 35b, 36a, 36b: communication path, 37, 3
8: Pin, 39, 40: Passage, 41, 42: Reservoir, 43: Bypass path.

Claims

[Scope of utility model registration request]

A board 10 attached to the front of the vehicle body, an arm 11 supported by the board 10, and a pair of left and right movable arms 14, 15 rotatably supported by the board 10 opposite to the arm 11; A drive cylinder 16 that rotates both movable arms 14 and 15, respectively.
, 17, and a hydraulic circuit 18 for operating the drive cylinders 16, 17, respectively.
The rotations of both the movable arms 14 and 15 are synchronized within a certain value α, and when the relative movement distance between the two movable arms 14 and 15 exceeds the certain value α, one of the two movable arms 14 and 15 A clamp device for a cargo handling vehicle, characterized in that a synchronous valve 19 is provided to stop rotation of a movable arm on the non-load side.