JPS63119590U

JPS63119590U -

Info

Publication number: JPS63119590U
Application number: JP987387U
Authority: JP
Priority date: 1987-01-28
Filing date: 1987-01-28
Publication date: 1988-08-02

Description

[Brief explanation of the drawing]

第１図は本考案の伸縮ブームの一実施例を示す
伸長状態概略側面図、第２図は同格納状態を示す
ブームの詳細側面図、第３図は同格納状態平面図
、第４図は中間ブームとトツプブームの異なる位
置での連結状態を示す平面図、第５図はガイドロ
ーラの取付状態を示す断面図、第６図はピンの着
脱状態を示す断面図、第７図は同詳細図、第８図
はロープ緊張装置の側面図、第９図は同断面図、
第１０図及び第１１図は本考案の作用説明図であ
る。３：ブーム、３ａ：ボトムブーム、３ｂ：中間
ブーム、３ｃ：トツプブーム、１２：ブーム伸長
用ロープ、１４ａ，１４ｂ，１５：シーブ、１６
：ロープ巻取ドラム、１９：補助ペンダントロー
プ、２１：ロープ緊張装置、２３：主ペンダント
ロープ。 Fig. 1 is a schematic side view of an embodiment of the telescopic boom of the present invention in the extended state, Fig. 2 is a detailed side view of the boom in the retracted state, Fig. 3 is a plan view of the boom in the retracted state, and Fig. 4 is a side view of the boom in the retracted state. A plan view showing how the intermediate boom and top boom are connected at different positions, FIG. 5 is a sectional view showing how the guide roller is attached, FIG. 6 is a sectional view showing how the pin is attached and removed, and FIG. 7 is a detailed view of the same. , FIG. 8 is a side view of the rope tensioning device, FIG. 9 is a sectional view of the same,
FIG. 10 and FIG. 11 are explanatory diagrams of the operation of the present invention. 3: Boom, 3a: Bottom boom, 3b: Intermediate boom, 3c: Top boom, 12: Boom extension rope, 14a, 14b, 15: Sheave, 16
: rope winding drum, 19: auxiliary pendant rope, 21: rope tensioning device, 23: main pendant rope.

Claims

[Scope of Claim for Utility Model Registration] (1) In a lattice boom composed of a top boom, a bottom boom, and one or more intermediate booms provided between them, the top boom, the intermediate boom, and the intermediate booms are nested one after another. In addition, the main pendant rope is attached to the tip of the top boom, the auxiliary pendant rope is attached to the tip of the intermediate boom on the proximal end, and one end is attached to the intermediate boom or the second and subsequent intermediate booms. The boom extension rope attached to the tip is passed through the sheave attached to the rear end of the intermediate boom or top boom of the second stage or later, and the sheave attached to the tip of the intermediate boom or the intermediate boom of the second stage or later. A lattice type telescopic boom characterized by being connected to a take-up device. (2) The lattice type telescopic boom according to claim 1 of the utility model registration claim, characterized in that an auxiliary pendant rope is attached to the tip of the intermediate boom via a rope tensioning device.