JPS5836884A - Pickup device for rope of crane - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crane having a boom that is bent in the middle.

For cranes with booms that bend in the middle,
A rope stretched along the boom has the disadvantage that it sag when the boom bends.

SUMMARY OF THE INVENTION An object of the present invention is to prevent the rope of a crane having a boom that bends in the middle from sagging without causing cargo handling problems.

The gist of the present invention is that a rope guide is provided on an arm attached to a boom, and the rope guide is displaced by rotation of the arm between a position that supports the crane and a position that does not interfere with cargo handling by the crane.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 6.

As shown in FIG. 1, the boom l, which is bent in the middle, has a tip side boom la supported from a mast 3 by a tensile romper 2, and a base side boom 1b connected to a main girder 4 by a shaft 4a so as to be rotatable up and down. A tip end boom 1a is attached to the base boom 1b so as to be rotatable up and down on a shaft 1c. Rakes 5a, 5b, and 5c are attached to each of the booms la and lb and the main girder 4, on which the trolley 5 shown in Fig. jg2 runs. A hoisting rope 3b is passed between the rope sheep ld on the base side boom lb and the rope sheep 3a on the mast 3, and by pulling this hoisting rope 3b with a rope winding device (not shown), from! By bending the poom l to the state shown in Figure 2, a space is created below the tip side poom la, through which a ship or the like can pass.

When the trolley 5 is in a straight line as shown in Fig. 1, the main girder 4. It is possible to travel between the base side boom lb and the tip side boom la by running on each rail 5a, 5b, '5C. Then, the trolley 5 is installed at each pool la as shown in Figure 2.
', lb can be evacuated to the main girder 4 side when the positional relationship is bent. The hook is passed between the two via a rope sheep, and then stretched along the boom l that comes out from the trolley 5, and is hung on the rope sheep 6 held at the tip of the poom 1.

A rotating arm 8 is disposed in the middle of the tip side boom 1a.The length of the shaft 8, that is, the rotation radius is such that the rotating end is attached to the tip side boom 1a and comes off the companion rail 5a, as shown in Fig. 1. It's long.

As shown in FIG. 4, this rotary arm 8 is equipped with a gear 8b, and a gear 10a meshes with this gear 8b. This gear 10a is attached to the rotating shaft of a hydraulic motor 10, which is used as a rotational drive device for the rotating arm 8. The hydraulic motor 10 itself is attached inside the boom la on the tip side.

The hydraulic motor IO is driven by receiving hydraulic pressure from the hydraulic unit 9. Further, two rope guides 11 are attached to the rotating end of the rotating arm 8 so as to be directly below the hoisting rope 7 as shown in FIG.

In this example, when loading cargo by a crane, each pool l
When a and lb are aligned in a straight line and made horizontal, the rotary arm 8 is rotated by the hydraulic motor 1O toward the tip side of the tip side boom la until it becomes horizontal. In this way, the rotating arm 8 and the rope guide 11 are connected to the rail 5 of the tip side boom la.
The position away from a is 4. Therefore, the trolley 5 can run to the front end side of the trench end side pool 1a on which the hanging tool W is suspended, and can perform cargo handling work.

Further, as shown in FIG. 2, when bending the pool 1, the rotary arm 8 is rotated by the hydraulic motor 10 in a direction closer to the base side of the pool 1b. In this way, the rope guide 11 section pulls the hoisting rope 7 up the river, so that the hoisting rope 7 is also held in a bent state by the rope guide 11 section in the same way as the poom 1.

Therefore, the hoisting p-build 7 does not hang down, and a space is provided below the tip side boom l for a ship or the like to pass through.

As shown in FIG. 2, when the hoisting rope 7 is pulled up and held by the rope guide 11, a load is placed on the hydraulic motor IO and the hydraulic unit 9.

In order to eliminate this burden and ensure reliable holding, the configurations shown in FIGS. 5 and 6 may be additionally adopted.

That is, as shown in FIG. 6, a horizontal pin 12 is attached to the center of the lower end of the rotating arm 8 via a placket 13, and a hook 14 for hooking this pin 12 is attached to the fifth
As shown in the figure, it is rotatably attached to the tip side boom la via a shaft 15. A cylinder rod portion of a hydraulic cylinder device 16 is connected to this hook 14 from the tip side boom 1a. The cylinder rod portion of the cylinder device 16 expands and contracts in response to hydraulic pressure from the hydraulic unit 9. For this,
The hook 14 can rotate up and down around the shaft.

According to another embodiment having such an additional configuration, the fifth
As shown by the chain line in the figure, when the rotating arm 8 rotates to the raised position where the hoisting rope 7 is hooked, the hook 14 is rotated by the cylinder device 16, and the bottle holder is hooked and held with the hook 14. do. In this way, the rotary arm 8 can be held by the hook 14, reducing the burden on the hydraulic motor 10 side, and the rotary arm 8 can be mechanically held, so that the held state is reliable.

As described above, according to the present invention, the means for holding the rope can be displaced between a position where it is out of the running path area of the trolley and a position where the rope can be bent and held. The effect of preventing the rope from sagging when the boom is bent can be achieved without causing any hindrance to cargo handling by the same type of crane.

[Brief explanation of the drawing]

Fig. 1 is a side view of the boom section of a crane according to an embodiment of the present invention, Fig. 2 is a side view of the boom shown in Fig. 1 when it is bent, and Fig. 3 is a side view of the boom shown in Fig. 1 and Fig. 2. FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 2, and FIG. and a schematic diagram of a holding device, and FIG. 6 is a sectional view corresponding to FIG. 4, which is another embodiment of the present invention. la... Tip side boom, lb... Base side boom, lc, 4a... Axis, 5...
Trolley, 5a, 5b. 5C...Rail, 7...Hoisting rope,
8...Rotating arm, 9...Hydraulic unit, lO...Hydraulic motor, 11...Rope guide

Claims (1)

[Scope of Claims] 1. A tip side poom and a proximal body side boom having a running path for the trolley are provided so as to be bendable to each other, and a rope stretched along each of the booms is provided at a position where the trolley deviates from the running path. a rotating arm having a radius of rotation that reaches
A rope pickup device for a crane, comprising: a rope guide attached to a portion of the rotary arm facing the rope; and a drive device attached to the rotary arm.