JPH0577192U - Hook storage - Google Patents

Abstract

(57) [Summary] [Purpose] By operating a wire rope that is stabilized by a sheave provided on the tip bracket, the hook is wound up by the tension of the wire rope, and the lower surface of the ring bracket and the upper surface of the hook bracket come into contact with each other. The hook rotates in contact with the hook, and a hoisting angle is increased in the hook storage device to be stored, thereby facilitating entry of a crane vehicle into a slope or the like. [Structure] The lower surface 20 of the link bracket 10 and the upper surface 17 of the hook bracket 7 are
It is characterized in that the hook 9 is constructed so as to have an angle so as to be inclined in the rotating direction when stored.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for tightly storing a hook, which is a suspender in a cargo handling vehicle such as a mobile crane.

[0002]

[Prior Art]

 Fig. 3 shows an external side view of a conventional mobile crane equipped with a forward-tilting boom, and Fig. 4 shows a side view of the main parts of the hook storage device. In the figure, a swivel base B is mounted on the upper part of a lower vehicle body A, and a front and rear boom C is provided on the upper swivel base B. A hook i is attached by a wire rope d and a wedge pin f via a sheave b and a sheave c provided on the tip boom a in a suspended state as shown in the figure in a working state. When storing the hook i, when the winch (not shown) is actuated and the wire rope d is contracted, the link bracket j rotates around the pin k in the direction of the arrow m, and the hook i is indicated by a chain double-dashed line. The storage state is as shown. Reference numeral h is a pin for swingably mounting the hook i on the hook bracket g.

[0003]

[Problems to be solved by the device]

In the conventional hook storage device in which the boom is lowered forward (FIG. 3), the lower surface j ₁ of the link bracket j and the upper surface g ₁ of the hook bracket g are in parallel contact with each other, When retracted, the lower part of the hook protrudes from the boss k _{1 of the} pin k below the tangent (n−n) to the front wheel tyre (small approach angle S ₂ ), which makes it difficult to penetrate slopes and ridges. There was a problem that became.

[0004]

[Means and Actions for Solving the Problems]

 The present invention has been made in view of the above, and the hook is wound up by the tension of the wire rope guided by the sheave provided on the tip boom, and the hook is wound up with the lower surface of the link bracket and the hook. In a hook device in which the upper surface of the bracket abuts and the hook rotates to be retracted, the lower surface of the link bracket and the upper surface of the hook bracket have an angle that tilts in the rotational direction when the hook is retracted when the hook is suspended. With this configuration, the lifting angle when the hook is stored is increased.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external side view of a mobile crane equipped with a forward tilting boom C equipped with a hook retractor according to the present invention, and FIG. 2 is a side view of a main part of the hook retractor according to the present invention. A hook 9 is attached by a wire rope 4, a wedge 5 and a wedge pin 6 via a sheave 2 and a sheave 3 provided in a suspended state as shown in the figure in a working state. When retracting the hook 9, the winch (not shown) is actuated to retract the wire rope 4, and the link bracket 10 pivots around the pin 11 in the direction of the arrow 13, and the hook 9 is indicated by a chain double-dashed line. The storage state shown in is set. Reference numeral 8 is a pin for swingably mounting the hook 9 on the hook bracket 7.

The above is the same as that of the prior art, but the most characteristic feature of the embodiment of the present invention is that the lower surface member 20 of the link bracket 10 and the upper surface member 17 of the hook bracket 7 are α It is configured so as to have an angle indicated by. Therefore, when the wire rope 4 is contracted to bring the hook 9 into the retracted state indicated by the chain double-dashed line, the lower surface member 20 and the upper surface member 17 are in contact with each other until the angle indicated by α becomes 0 and they are in close contact with each other. The hook 9 is lifted up, and the lift-up angle θ ₁ is larger than the conventional swing-up angle θ ₂ shown in FIG. 4, and the lower part of the hook 9 does not protrude below the tangent line (n−n) shown in FIG. Therefore, the approach angle S ₁ becomes larger than that of the conventional one, and the invasion property on the slope and the convex portion is improved.

Further, in order to compare and explain the magnitude of the tensile load applied to the wire rope, FIG. 5 (a) shows an explanatory view of the hook storing device according to the present invention, and FIG. 5 (b) shows a conventional one. You In the figure, when retracting the wire rope 4 (d) when retracting the hook, the wedge pin center 6 (f) rotates in the direction of the arrow 13 by the angle α, and the link bracket 10, the hook bracket, and the hook 9 rotate integrally. At this time, the arm length Y ₁ becomes larger than Y ₂ without the angle α, and the tensile load applied to the wire rope 4 can be reduced.

[0008]

[Effect of the device]

 This invention is made as described above in detail, and the swinging angle when the hook is retracted is large, and the distance from the ground to the bottom surface of the hook when the crane is in the retracted state is large when the crane is running. It will be easier to enter.

[Brief description of drawings]

FIG. 1 is an external side view of a mobile crane equipped with a forward tilting boom equipped with a storage device according to the present invention.

FIG. 2 is a side view of essential parts of an embodiment of a hook storing device according to the present invention.

FIG. 3 is a side view of essential parts of a conventional mobile crane equipped with a forward-tilting boom.

FIG. 4 is a side view of a main part of a conventional hook storage device.

FIG. 5 (a) is a diagram for explaining the magnitude of the tensile load applied to the wire rope of the hook storage device according to the present invention. (B) It is a figure for demonstrating the magnitude of the tensile load applied to the wire rope of the conventional hook storage device.

[Explanation of symbols]

 1 Tip boom 2 Sheave 3 Sheave 4 Wire rope 7 Hook bracket 9 Hook 10 Link bracket 17 Top surface of hook bracket 20 Bottom surface of link bracket

Claims (1)

[Scope of utility model registration request] 1. In a mobile crane equipped with a forward-tilting boom, a hook 9 is wound up by the tension of the wire rope 4 by operating a wire rope 4 which is stabilized by sheaves 2 and 3 provided on the tip boom 1. In the hook storage device in which the lower surface 20 of the link bracket 10 and the upper surface 17 of the hook bracket 7 are brought into contact with each other to rotate and store the hook 9, the link bracket lower surface 20 and the hook bracket upper surface 17 suspend the hook 9. The hook storage device is characterized in that it has an angle such that it tilts in the rotating direction when the hook 9 is stored.