JPS5964497A - Anchor device for crane - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a crane anchor device with an improved weight arm operation structure.

[Prior art]

A fixing structure for a weight arm of a conventional crane anchor device will be explained with reference to FIGS. 1 to 3. ! 1rII
J is a plan view, FIG. 2 is a front view, and FIG. 3 is a side view.

In the figure, the weight arm 3 has its middle portion fixed to a shaft 1 rotatably supported by a bearing 2, and one end of the weight arm 3 has a bolt 5. A weight 4 is fixed via a nut 6. A rick 12 is rotatably attached to the other end of the weight arm 3 via a pin 9, and the lower end of the linochle is rotatably connected to the upper end of the linochle 10 via a bottle 13. The lower end of the anchor plate 1o is detachably fixed via an anchor plate receiving pin 14 to an anchor bracket 15 fixed to a foundation (not shown) via an anchor bolt 16. The link 120 of the weight arm 3 on the anchor plate 10 side is connected to the weight arm 3 when the crane is stopped.
The rotational moment is larger than that on the fixed side of the weight 4, and the weight 4 is automatically positioned in the solid line state shown in the figure. 8 is a bracket that limits the rotation angle when the weight 4 is pushed down in the direction of the arrow and rotated to the dotted line position 114° during operation of the crane; 7 is a pin that fixes the weight arm 3 to the bracket 8; Reference numeral 11 is a gauge switch for detecting whether the anchor car is off or off.

In this crane's anchorage device ζ, when the crane is normally operated, the anchor hook 10 is pulled up and placed at 1f so that the weight arm 3 is at the position indicated by the two-dot chain line. To achieve this state, apply force in the downward direction of the arrow to the weight 4, move it to the two-dot chain line position, and keep the weight arm 3 in contact with the bracket 8. Fix the weight arm 3 to the bracket 8 for receiving the weight arm using the pin 7, and it is in a stable state. It is designed to be held in place. When the operation of the crane is stopped and suspended, the pin 7 is pulled out, the anchor grate 1o is lowered and dropped into the anchor plate 15, and the anchor plate receiving pin 14 is attached and the anchor plate 1o is fixed. In these operations, inserting and removing the bottle 7 is extremely troublesome. That is, it is necessary to apply force in the downward direction of the arrow or the opposite direction to the weight 4 with one hand, and to remove and insert the pinot 7 with the other hand.

[Purpose of the invention]

The present invention was made in view of the above situation, and provides a 1 ton crane anorker device with a simple structure and improved operability.
1”.

[Summary of the invention]

The crane anchor device of the present invention includes a weight arm whose intermediate portion is fixed to a rotatably supported shaft and whose rotation is restricted by a bracket at the weight fixed end side or at a predetermined lower position during crane operation; The weight is fixed to one end of the arm, and means is detachably fixed to the other end of the weight arm or by pivoting downward about the shaft when the crane is in a stopped state,
The weight is configured to be raised when the crane is stopped and lowered when the crane is in operation, and the weight is configured to:
The weight arm is attached to the weight arm such that it can be slid in a variable position in the longitudinal direction.

[Embodiments of the invention]

Hereinafter, the crane anchor device of the present invention will be explained using one embodiment with reference to FIGS. 4 to 6, where the same parts as those of the conventional art are denoted by the same reference numerals, and the explanation of the structure of the same parts will be omitted. Figures 4 and 5
6 are a plan view, a front view, and a side view of the same parts as FIGS. 1, 2, and 3, respectively. In the figure, a weight 17 is mounted on a kite plate 19 so as to be slidable in the longitudinal direction of the weight arm 3. As shown in detail in FIG. 7, the bolt A, which slides through an oblique long hole provided in the weight arm 3 while being supported by a pair of logs, has weights 17 disposed on both sides of the weight arm 3.
17 is fixed, and it is formed so that it can be pulled out or pushed in by a handle 18 fixed to the way 17.17. 21 is a spacer, and n is a nut.

The solid line positions of the weight arm 3 and weight 17 indicate the stopped state of the crane. When entering the operating state from this state, after pulling out the anchor plate receiving pin 14 of the anchor plate 10, the weight 17 is slid in a direction away from the shaft 1 in the vertical direction in FIG.

As a result, with the shaft 1 as the fulcrum, the anchor plate 1
0 is pushed upward and the clockwise rotation of the weight arm 3 comes into contact with placket No. 8 of the stopper and is stopped. In this position, the weight 17 does not move due to its own weight unless an external force is applied, and therefore there is no need for two pins to fix the weight arm 3 to the bracket 8 as in the prior art.

Next, to stop the crane and take a rest, push the handle 18 and move the weight 17 along the kite plate 19 to the fulcrum side (axis l side). Due to the moment difference, the weight arm 3 to which the anchor plate 10 is attached is rotated counterclockwise, and the anchor plate 10 is dropped into the anchor bracket 15. An anchor plate receiving pin 14 is attached to this anchor placket 15 to fix the anchor plate 10'. Even if the anchor plate receiving bin 14 is not installed, the weight arm 3 will be in a stable state unless an external force is applied. In this way, the anchor device N of the crane on the wood flow side is attached to the weight arm. By forming the weight so that it can be slid freely, a moment difference is created, that is, by using the weight's own weight, it is possible to hold the anchor plate in position 11q, so the fixation of the weight arm by Pino becomes easy. The simple structure significantly improves operability.

〔Effect of the invention〕

As described above, the crane anchor device of the present invention has the following features:
This has the effect of improving operability with a simple structure.

[Brief explanation of the drawing]

Figure i1 is a plan view of a conventional crane anchor device, the second
3 and 3 are front views of FIG. 1, respectively. The side views and FIGS. 4 to 6 show an embodiment of the crane anchor device of the present invention, and FIGS. 6 is a plan view, a front view, and a side view of the same portions as in FIGS. 1 to 3, respectively, and FIG. 7 is an enlarged cross-sectional view taken along the line ■-■ in FIG. 5. ■・・・Axis, 2...Pair link, 3...
Weight arm, 8... Bracket, 10... Anchor plate, 12... Link, 15...
Anoka car bracket, 17--Weight half 1 figure, 3 figures, 4 figures, 6 figures

Claims (1)

[Claims] 1. A weight arm whose intermediate portion is fixed to a rotatably supported shaft and whose rotation is restricted by a bracket with the weight fixed end side at a predetermined downward position when the crane is in operation; and the above-mentioned weight fixed to one end of the weight arm. , the other end of the weight arm has means for rotating and lowering around the shaft when the crane is in a stopped state and is detachably fixed, and the weight is raised when the crane is stopped; 1. An anchor device for a crane, which is configured to be lowered during operation, and wherein the weight is attached to the weight arm so as to be slidable in the longitudinal direction.