JPS63173183U - - Google Patents

Description

[Brief explanation of the drawing]

Figures 1 to 11 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 with the jib pulled up vertically, Fig. 7 is a side view of the jib extended state, and Fig. 8 is a partial enlargement of the state shown in Fig. 1. 9 is an enlarged perspective view of the same, FIG. 10 is an enlarged sectional view taken along the line AA in FIG. 8, FIG. 11 is a partially enlarged view of the state shown in FIG. FIG. 13 is a diagram equivalent to FIG. 9 showing another embodiment, FIG. 14 is a diagram equivalent to FIG.
FIG. 15 is a partially enlarged front view of the stage shown in FIG. 5 showing yet another embodiment, FIG. 16 is a view equivalent to FIG. 11, and FIG.
FIG. 6 is a sectional view taken along the line B--B, FIG. 18 is a partially enlarged side sectional view showing another embodiment, FIG. 19 is a partially enlarged side sectional view showing yet another embodiment, and FIG. 20 is a partially enlarged side sectional view showing yet another embodiment. 1
Figure 9 is an enlarged sectional view taken along line C-C, Figure 21 is Figure 20D
- D line, Figure 22 is a cross-sectional view of the same E-E line, Figure 23
The figure is a side view of the conventional example with the jib extended.
4 is a plan view of the same, FIG. 25 is a side view showing the jib in a hanging state, and FIG. 26 is a side view showing the same in a retracted state. 3...Telescopic boom, 31...Lower jib mounting shaft when stored, 31a...Main mounting part of the same mounting shaft, 31b...Auxiliary mounting part, 4...Jib, 4a...Main girder (lower side of jib) when stored ), 41...lower jib foot when retracted,
42... Upper jib foot, 6... Connector, 61... Rod for attaching the connector, x... Rod axis (axis shifted downward with respect to the lower side of the jib), 62... Means for fixing the connector in the advanced state Thrust plate constituting 63... protrusion of the same thrust plate, 44... stopper, 7... fixing pin mechanism constituting another example of the same means, 72... pin of the same mechanism, 64, 66, 67...
Pin hole of the same connector.

Claims (1)

[Scope of utility model registration request] It is equipped with a telescoping boom with jib mounting shafts protruding from both the left and right sides of the tip, and a compression column type jib with jib feet that are removably connected to the jib mounting shafts on both the left and right sides of the base end. The jib is stored on the lateral side of the boom in a vertical position with the jib foots on both sides positioned vertically, and is extended from the tip of the boom with the jib foots on both sides connected to the jib mounting shafts on both sides. At the lower side of the jib in the retracted state, there is a connecting tool that connects the lower jib foot in the retracted state to the jib mounting shaft, which is connected to the jib mounting shaft when the jib is extended, and is rotatable about the mounting shaft. , is mounted so as to be freely rotatable around an axis shifted downward with respect to the lower side of the jib in the jib stowed state, and to be slidable forward and backward along this axis, and in the jib stowed state; A crane jib extension and storage device characterized by comprising means for fixing the connector in the extended state.