JPS63173185U

JPS63173185U -

Info

Publication number: JPS63173185U
Application number: JP6463187U
Authority: JP
Priority date: 1987-04-28
Filing date: 1987-04-28
Publication date: 1988-11-10
Also published as: JPH0350149Y2

Description

[Brief explanation of the drawing]

第１図乃至第１２図は本考案の基本実施例を示
し、第１図はジブ格納状態、第２図はジブ垂下状
態、第３図はジブツイスト途中状態、第４図はジ
ブツイスト完了状態をそれぞれ示す側面図、第５
図は第４図状態の正面図、第６図はさらにジブを
垂直に引き上げた状態の正面図、第７図はジブ張
出し状態の側面図、第８図は第１図の部分拡大図
、第９図は同拡大斜視図、第１０図は第８図Ａ―
Ａ線、第１１図は同Ｂ―Ｂ線各拡大断面図、第１
２図は第６図の部分拡大図、第１３図は連結体の
構成にかかる他の実施例を示す第９図相当図、第
１４図はさらに別の実施例を示す第１２図相当図
、第１５図はさらにまた別の実施例を示す第５図
段階の部分拡大正面図、第１６図は同第１２図相
当図、第１７図はまた別の実施例を示す第５図段
階の部分拡大正面図、第１８図は同第１２図相当
図、第１９図はさらに別の実施例を示す第１２図
相当図、第２０図はさらにまた別の実施例を示す
第１図相当図である。１…伸縮ブーム、１１…格納時下側ジブ取付軸
（軸体）、２…ジブ、２ａ…格納時下側となる主
桁、２１…格納時下側ジブフツト、２２…同上側
ジブフツト、４…連結体、４１，８…同連結体の
ロツド、ｘ…同ロツド軸心、５，６…一対のバネ
。 Figures 1 to 12 show the basic embodiment of the present invention; Figure 1 shows the jib in the retracted state, Figure 2 shows the jib in the hanging state, Figure 3 shows the jib in the middle of twisting, and Figure 4 shows the jib in the completed twisting state. Side view shown, fifth
The figure is a front view of the state shown in Fig. 4, Fig. 6 is a front view of the state in which the jib is pulled up vertically, Fig. 7 is a side view of the jib extended state, and Fig. 8 is a partially enlarged view of Fig. 1. Figure 9 is an enlarged perspective view of the same, Figure 10 is Figure 8A-
A line, Fig. 11 is an enlarged cross-sectional view of the same B-B line, Fig. 1
2 is a partially enlarged view of FIG. 6, FIG. 13 is a view equivalent to FIG. 9 showing another embodiment of the structure of the connecting body, and FIG. 14 is a view equivalent to FIG. 12 showing yet another embodiment. Fig. 15 is a partially enlarged front view of the stage shown in Fig. 5 showing yet another embodiment, Fig. 16 is a view corresponding to Fig. 12, and Fig. 17 is a part of the stage shown in Fig. 5 showing yet another embodiment. An enlarged front view, FIG. 18 is a view equivalent to FIG. 12, FIG. 19 is a view equivalent to FIG. 12 showing yet another embodiment, and FIG. 20 is a view equivalent to FIG. 1 showing yet another embodiment. be. DESCRIPTION OF SYMBOLS 1...Telescopic boom, 11...Lower jib mounting shaft (shaft body) when stored, 2...Jib, 2a...Main girder that becomes lower side when stored, 21...Lower jib foot when stored, 22...Upper side jib foot, 4... Connecting body, 41, 8...rod of the connecting body, x... axis of the rod, 5, 6... a pair of springs.

Claims

[Scope of utility model registration request]

A connecting body with a rod on either the left or right side of the base end of the jib is provided so as to be rotatable about the axis of the rod with respect to the jib main girder, while this connecting body is attached to the tip of the boom. A shaft body is provided that is removable and rotatably connected around a horizontal axis in the left and right directions, and when the jib is extended, the jib is suspended from the storage position on the side of the boom using the connection point between these connecting bodies and the shaft body as a fulcrum. , in a crane that twists and rotates the rod around its axis and performs the opposite jib movement when retracting the jib, the jib twisting force applied to the rod of the connecting body when the jib is extended and retracted is applied to the jib. A pair of springs to be applied are wound in opposite directions, and one end is fixed to the jib and the other end is fixed to the rod. A crane jib extension and storage device, characterized in that the jib is wrapped around the other end while being fixed.