JPS6341090U

JPS6341090U -

Info

Publication number: JPS6341090U
Application number: JP13523086U
Authority: JP
Priority date: 1986-09-02
Filing date: 1986-09-02
Publication date: 1988-03-17
Also published as: JPH0432397Y2

Description

[Brief explanation of the drawing]

第１図乃至第６図は本考案の実施例を示し、第
１図はジブ格納予備状態の側面図、第２図はジブ
格納状態の側面図、第３図はジブ支持機構を示す
一部断面拡大側面図、第４図はジブガイド機構を
示す拡大側面図、第５図はジブリフトアツプ状態
の第４図相当図、第６図は第２図―線拡大断
面図、第７図は従来例を示すジブ格納状態の側面
図、第８図は同平面図、第９図はジブ張出し作業
途中の側面図、第１０図はジブ張出し完了状態の
側面図である。１……ブーム、１２，１３……ジブフツトピン
、２……補助ジブ、２１，２２……ジブフツト、
４……係合体としてのローラ、６……ジブガイド
、６ａ……傾斜溝部、６ｂ……水平溝部、６１，
６２……ガイドプレート、６２ａ……ガイドプレ
ートの水平部分、７……ジブ支持機構、７１……
同機構のジブ側係合杆、７２……同ブーム側ブラ
ケツト、７１ａ，７２ａ……同ピン孔、７３……
同ピン、８……リフトアツプシリンダ。 Figures 1 to 6 show an embodiment of the present invention, Figure 1 is a side view of the jib in the pre-storage state, Figure 2 is a side view of the jib in the retracted state, and Figure 3 is a part showing the jib support mechanism. Fig. 4 is an enlarged side view showing the jib guide mechanism, Fig. 5 is a view corresponding to Fig. 4 in the jib lift-up state, Fig. 6 is an enlarged cross-sectional view taken along the lines of Fig. FIG. 8 is a plan view of the jib in the stored state, FIG. 9 is a side view of the jib in the middle of extending the jib, and FIG. 10 is a side view of the jib in the fully extended state. 1... Boom, 12, 13... Jib foot pin, 2... Auxiliary jib, 21, 22... Jib foot,
4...Roller as an engaging body, 6... Jib guide, 6a... Inclined groove part, 6b... Horizontal groove part, 61,
62...Guide plate, 62a...Horizontal portion of guide plate, 7...Jib support mechanism, 71...
Jib side engagement rod of the same mechanism, 72... Boom side bracket, 71a, 72a... Same pin hole, 73...
Same pin, 8...Lift up cylinder.

Claims

[Scope of utility model registration request]

The boom is equipped with a telescopic boom and an auxiliary jib extending from the tip of the boom, and the boom is provided with jib foot pins located below the bottom surface of the boom when the boom is horizontal, on both sides of the boom point sheave block. On one lateral side, there is a sloping groove that slopes downward when the boom is horizontal.
A jib guide consisting of a horizontal groove continuous to the rear of this inclined groove is formed by the guide rail,
On the other hand, the auxiliary jib is provided with an engaging body that is detachable from the jib guide and moves from the inclined groove to the horizontal groove of the jib guide when the auxiliary jib is stored. A bifurcated jib foot is provided that can be engaged with and disengaged from the boom, and one of the jib feet is configured to be rotatable around the jib foot axis. When not in use, the boom is stored in a vertical position with both jib feet positioned vertically, and with the engaging body positioned in the horizontal groove of the jib guide, along the lateral side of the boom provided with the jib guide. In the wheel crane configured as follows, there is provided a jib support mechanism that supports the auxiliary jib in a retracted state so that it can swing up and down, and a jib foot on the lower side of the auxiliary jib is moved from the bottom surface of the boom using the jib support point of this jib support mechanism as a fulcrum. a lift-up mechanism for pushing up the jib guide to an upper position; the lift-up mechanism includes a guide rail portion that supports the engaging body in the horizontal groove of the jib guide, which is attached to the boom so as to be movable up and down; An auxiliary jib storage device for a wheel crane, characterized in that a lift-up cylinder for moving the section up and down is provided between a guide rail section and a boom.