JP2552163Y2 - Hook block storage device for mobile crane with bending boom - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device for a hook block of a mobile crane having a bending boom.

[0002]

2. Description of the Related Art As shown in FIG. 3, a mobile crane having a bending boom is provided with a first boom 3 mounted on a swivel base 2 slidably driven on a traveling body 1 so as to be able to move up and down. A second boom 4 whose base end is attached to the distal end of the third boom so as to be able to bend and extend freely .
In the bent state of the second boom 4, a bending boom is provided so that the abdominal surface of the second boom 4 is close to the abdominal surface of the first boom. Then, the winch 5 disposed on the first boom 3 or the swivel base 2 reaches the tip of the second boom 4 via the tip of the first boom 3 and the tip of the second boom 4 and reaches the tip of the second boom 4. Hook block 8 with the wire rope 7 pulled out through the hook block suspension pulley 6
Is suspended. The hook block suspension pulley is disposed so as to protrude from the abdominal surface of the second boom.

In the mobile crane having the bending boom A of this type, the bending boom is stored in a state where the second boom 4 is in the folding position and the first boom 3 is folded down along the traveling direction of the traveling body 1 ( The vehicle travels as described in the embodiment of the present invention (see the state shown in FIG. 1). In the retracted state of the bending boom A, since the second boom 4 has its abdominal surface facing upward , the hook block suspended on the abdominal surface side of the second boom by the hook block suspending pulley 6 at the distal end of the second boom 4. It gets in the way. Therefore mobile crane having a conventional folding boom of this kind, and when to the folding boom A storage state, the second blanking
The wire rope 7 is removed from the hook block suspension pulley 6 at the tip of the arm 4 , and the hook block 8 is stored at an appropriate position on the traveling body 1.

However, between the retracted state and the extended state (use state) of the bending boom A, the work of detaching or engaging the wire rope with the hook block suspension pulley 6 each time is troublesome, and the work efficiency is reduced. Had been lowered.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to remove the bending boom A without removing the wire rope 7 from the hook block suspension pulley 6 at the tip of the second boom 4. The present invention is to provide a hook block storage device of a mobile crane having a bending boom that can be set in a storage state (a state in which the second boom 4 is in a folded state and the first boom is lying down).

[0006]

Means for Solving the Problems To achieve the above object, a hook block storage device of a mobile crane having a bending boom according to the present invention is configured as follows. A first boom 3 having a base end mounted on a revolving base 2 that is freely rotatable on a traveling body 1 so as to be able to move up and down, and a base end of the first boom 3 that can be flexibly extended and extended. It consists second boom 4 which is attached to, the second boom 4
In the folded state, the abdominal surface of the second boom 4 is
And a winch 5 disposed on the first boom 3 or the swivel base 2 to reach the distal end of the second boom 4 via the distal end of the first boom 3. Wire rope 7 pulled out via hook block suspension pulley 6 attached to the tip of second boom 4
Accordingly, a hook block storage device of a mobile crane having a bending boom A that hangs a hook block 8 from a distal end portion of a second boom, and is closer to a base end than the hook block hanging pulley 6 A rope guide 9 protruding outward from the side surface of the second boom 4 at an appropriate position on the outside of the second boom 4, and capable of engaging and disengaging the wire rope 7 pulled out via the hook block suspension pulley 6. In a state in which the second boom 4 is folded and the first boom 3 is folded down, the wire rope 7 is wrapped around the rope guide 9 so that the rope guide 9 is suspended from the hook block 8. A hook block storage device for a mobile crane having a bending boom, wherein the hook block storage device is configured to be able to hang on a side surface of the second boom 4.

[0007]

According to the above configuration, when the bending boom A is in the retracted state, the first boom 3 is raised and lowered and the second boom 4 is flexed and stretched as appropriate, and the tip of the second boom 4 is positioned near the ground. Hook block 8 by winch 5
To the ground, and loosen the wire rope 7. Then, the intermediate position of the wire rope 7 between the hook block suspension pulley 6 and the hook block 8 lowered onto the ground is wrapped around the rope guide by using the slack of the wire rope 7. Over turning of the rope guide wire rope 7, wire rope 7 after turning over the second blanking
The direction is guided to the rear side of the arm 4 . Then the second
The boom 4 is folded, the first boom 3 is folded down, and the winch 5 is appropriately wound up so that the folded boom A is stored. In the retracted state, the hook block 8 is
It is suspended via the side of the boom. To change the bending boom A from the retracted state to the working state, the above operation may be reversed.

[0008]

FIG. 1 shows an embodiment of a hook block storage device of a mobile crane having a bending boom according to the present invention.
A description will be given based on FIG. The symbol shown in FIG.
The numbers and their configurations are incorporated in the following description.

In FIG. 1 and FIG. 2, reference numeral 9 denotes a rope guide which is provided at an appropriate position on the base end side of the hook block suspension pulley 6 outside the second boom 4 and protrudes outward from the side surface of the second boom 4. It is. In this embodiment, the first boom 3
The second boom 4 and the second boom 4 are both constituted by telescopic booms. The rope guide 9 is constituted by a small-diameter sheave attached to the distal end of the most proximal boom of the second boom 4. The rope guide 9 is configured so that the wire rope 7 between the hook block suspension pulley 6 and the hook block 8 can be hung and disengaged (disengaged).
Of the bent boom A (when the first boom 3 falls down and the second boom 4
The hook block 8 is suspended from the rope guide 9 via the side surface of the second boom 4 (the state shown in FIGS. 1 and 2).

In FIG. 1, reference numeral 10 denotes a wire rope 7 passing through the abdominal surface of the second boom 4 (a wire rope 7 between a hook block suspension pulley 6 and a rope guide pulley 9).
Is a guide protruding from the abdominal surface of the second boom 4 to guide the second boom. Reference numeral 11 denotes a hook block housing portion which is disposed on the traveling vehicle body 1 with the positional relationship such that the hook block 8 suspended from the rope guide 9 is received when the bending boom A is stored.

Next, the operation will be described. When the folded boom A is changed from the use state to the retracted state (the state shown in FIG. 1) as shown in FIG. 3, the first boom 3 is raised and lowered, and the second boom 4 is bent and stretched as needed. The hook block 8 is lowered to the ground by the winch 5 and the wire rope 7 is loosened. Moreover,
The intermediate position of the wire rope 7 between the hook block suspension pulley 6 and the hook block 8 lowered on the ground is looped around the rope guide 9 and the guide 10 using the slack of the wire rope 7. The wire rope 7 is wound around the rope guide 9 in a direction in which the wound wire rope 7 is guided to the rear side of the second boom 4. Next, the hook block 8 is appropriately wound up by the winch 5 and the second boom 4 is folded. next,
The first boom 3 falls down along the traveling direction of the traveling vehicle body 1 (rearward in this example) using the turning of the swivel base 2 in parallel, and the bending boom A is set in the retracted state. In this state, the hook block 8 is suspended from the rope guide 9 via the side surface of the second boom 4. The hook block 8 suspended from the side surface of the second boom 4 with the rope guide 9 as a suspension part in the above-described most course is accommodated in a hook block accommodation portion attached to the traveling vehicle body 1.

When the folding boom A is changed from the stored state to the used state, the above operation may be performed in reverse.

[0013]

The hook block storage device of the mobile crane having the folding boom according to the present invention, which is constructed and operated as described above, has a simple structure in which the rope guide 9 is attached to the second boom, but the bending boom A is provided. When changing the state between the storage state and the use state, the wire rope 7 from the hook block suspension pulley 6 at the tip of the second boom is used.
It is not necessary to carry out the removal (disengagement), and therefore, it greatly contributes to the improvement of the work efficiency of the mobile crane.

When the hook block accommodating portion is attached as in the above embodiment, the hook block 8 can be stored in a more stable state when the bending boom A is stored.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a mobile crane embodying the present invention, in which a bending boom is stored.

FIG. 2 is an explanatory view of a main part of a distal end portion of a second boom in FIG. 1;

FIG. 3 is an explanatory view of a mobile crane having a bending boom, and is an explanatory view of a crane working state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running body 2 Swivel base 3 1st boom 4 2nd boom 5 Winch 6 Hook block hanging pulley 7 Wire rope 8 Hook block 9 Rope guide 10 Guide 11 Hook block accommodation part

Claims (1)

(57) [Scope of request for utility model registration] 1. A first boom (3) having a base end mounted on a swivel (2) rotatably driven on a traveling body (1) so as to be able to move up and down, and a base end on a distal end of the first boom (3). I from the second boom 4 which is mounted for flexion and extension driven
In the folded state of the second boom 4, there is provided a bending boom A configured such that the abdominal surface of the second boom 4 is close to the abdominal surface of the first boom 3. With the wire rope 7 pulled out through the hook block suspension pulley 6 attached to the tip of the second boom 4 and reaching the tip of the second boom 4 via the tip of the 1 boom 3, A hook block storage device for a mobile crane having a bending boom A that hangs a hook block 8 from a distal end of a second boom, the second boom 4 being closer to the base end than the hook block hanging pulley 6. A rope guide 9 disposed at an appropriate position outside the side of the second boom 4 so as to protrude outward from the side surface of the second boom 4, wherein the rope guide 9 is capable of engaging and disengaging a wire rope 7 drawn through the hook block suspension pulley 6. In the state where the second boom 4 is folded and the first boom 3 is laid down, the wire rope 7 is wrapped around the rope guide 9 so that the rope guide 9 is suspended and the hook block 8 is moved to the second position. A hook block storage device for a mobile crane having a bending boom, wherein the hook block storage device is configured to be hung on a side surface of the boom 4.