JPH061386U - Hook block retractor for mobile crane with folding boom - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The hook block 8 is composed of the first boom 3 and the second boom 4, and the hook block 8 is attached to the hook block suspension pulley 6 at the tip of the second boom 4 and the hook block 8 is fixed. In a mobile crane having a folding boom A that is suspended,
In the retracted state of the folding boom A, the second boom 4 is folded to the lower side of the first boom 3 with its abdominal surface facing upwards. Therefore, in the retracted state of the folded boom A, the wire rope 7 is hooked on the hook block hanging pulley 6. I had to take it off. A storage device that does not require it is provided. [Structure] A rope guide 9 protruding from the side surface of the second boom 4 is attached to the outside of the second boom 4 that is closer to the base end side than the hook block suspension pulley 6, and when the folding boom A is stored, the wire rope 7 is attached to this rope. The hook block 8 can be hung around the guide 9 so that the hook block 8 can be hung on the side surface of the second boom 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a storage device for a hook block of a mobile crane having a folding boom.

[0002]

[Prior art]

 As shown in FIG. 3, a mobile crane having a folding boom includes a first boom 3 which is mounted on a swivel base 2 which is arranged on a traveling body 1 so as to be capable of rotating, and a first boom 3 which can be driven to move up and down, and a tip portion of the first boom 3. A bending boom A having a second boom 4 attached at its base end so that it can be flexibly extended and driven. Especially, when the second boom 4 is bent, the abdominal surface of the second boom 4 becomes the abdominal surface of the first boom. It has a folding boom configured to be close together. Then, the first boom 3 or the winch 5 arranged on 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. A hook block 8 is suspended by a wire rope 7 pulled out through a hook block suspension pulley 6 at the tip. The hook block suspension pulley is arranged so as to project from the abdominal surface of the second boom.

A mobile crane having a folding boom A of this type is a folding boom in which the second boom 4 is set to the folding position and then the first boom 3 is laid down along the traveling direction of the traveling body 1. It is adapted to travel and move in a stored state (see the state shown in FIG. 1 for explaining the embodiment of the present invention). In the retracted state of the folding boom A, the belly surface of the second boom 4 faces upward. Therefore, the hook block hanging pulley 6 at the tip of the second boom 3 causes the hook block suspended to the belly surface side of the second boom. Get in the way. Therefore, in the conventional mobile crane having this type of folding boom, when the folding boom A is stored, the wire rope 7 is removed from the hook block suspension pulley 6 at the tip of the second boom 3. In the above, the hook block 8 is stored in an appropriate position on the traveling body 1.

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

[0005]

[Problems to be solved by the device]

 The purpose of the present invention is to solve the above-mentioned problems of the prior art, and to store the folding boom A in the retracted state (without the second boom 4 without removing the wire rope 7 from the hook block suspension pulley 6 at the tip of the second boom 4). (EN) It is an object to provide a hook block storage device for a mobile crane having a folding boom that can be folded and the first boom can be laid down.

[0006]

[Means for Solving the Problems]

 To achieve the above object, the hook block storage device for a mobile crane having a folding boom of the present invention is constructed as follows. A first boom 3 whose base end is attached to a swivel base 2 which is arranged on the traveling body 1 so that it can be driven to swing, and a base end of the first boom 3 which can be flexibly extended and driven. A bending boom A composed of a second boom 4 attached to the first boom 3, and in particular, 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 when the second boom 4 is folded. The hook block hanging from the winch 5 arranged on the first boom 3 or the swivel base 2 to the tip of the second boom 4 via the tip of the first boom 3 and attached to the tip of the second boom 4. A hook block storage device for a mobile crane having a folding boom A formed by suspending a hook block 8 from a tip end portion of a second boom by means of a wire rope 7 pulled out through a lower pulley 6. A rope guide 9 is provided at a proper position outside the second boom 4 on the base end side of the hook block suspension pulley 6 so as to project outward from the side surface of the second boom 4, and the hook block suspension pulley 6 is connected to the rope guide 9. In the state where the rope guide 9 that can engage and disengage the wire rope 7 that has been pulled out is provided, and the second boom 4 is in the folded state and the first boom 3 is lying down, the wire rope 7 is wound around the rope guide 9 and A hook block storage device for a mobile crane having a folding boom, wherein the hook block 8 is configured to be suspended on a side surface of the second boom 4 by using a rope guide 9 as a suspension portion.

[0007]

[Action]

 According to the above configuration, when the folding boom A is retracted, the first boom 3 is raised and lowered and the second boom 4 is bent and stretched so that the tip of the second boom 4 is located near the ground and the winch 5 is used. To lower the hook block 8 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 that has been lowered to the ground is laid around the rope guide using the slack of the wire rope 7. When running the wire rope 7 around the rope guide, the wire rope 7 after being run around is guided to the rear side of the second boom 3. Next, the second boom 4 is folded, the first boom 3 is laid down, and the winch 5 is appropriately wound up to put the folding boom A into the retracted state. In the retracted state, the hook block 8 is suspended from the side surface of the second boom. In order to change the folding boom A from the retracted state to the working state, the above operation may be reversed.

[0008]

【Example】

 An embodiment of a hook block storage device for a mobile crane having a folding boom according to the present invention will be described below with reference to FIGS. 1 and 2. The above-mentioned transcription shown in FIG. 3 and the configuration thereof are incorporated in the following description.

In FIG. 1 and FIG. 2, reference numeral 9 denotes a rope guide provided at a proper position outside the second boom 4 on the proximal side of the hook block suspension pulley 6 so as to project outward from the side surface of the second boom 3. Is. In this embodiment, both the first boom 3 and the second boom 4 are telescopic booms, and the rope guide 9 has a small diameter attached to the tip of the boom on the most proximal end side of the second boom 4. It is made up of sheaves. The rope guide 9 can be detached (engaged) in the middle of the wire rope 7 between the hook block hanging pulley 6 and the hook block 8, and when the relevant portion of the wire rope 7 is laid around, In the retracted state of the folding boom A (the state in which the first boom 3 is laid down and the second boom 4 is folded), the hook block 8 suspends via the side surface of the second boom 4 with the rope guide 9 as a suspension part. 1 and 2).

Incidentally, in FIG. 1, reference numeral 10 indicates a wire rope 7 (wire rope 7 between the hook block suspension pulley 6 and the rope guide pulley 9) passing on the abdominal surface side of the second boom 4 for the purpose of consideration. 2 is a guide projecting on the abdomen of the boom 4. Reference numeral 11 denotes a hook block accommodating portion arranged on the traveling vehicle body 1 in such a positional relationship that the hook boom 8 suspended from the rope guide 9 is received when the folding boom A is stored.

Next, the operation will be described. When the folding boom A as shown in FIG. 3 is moved from the used state to the stored state (the state shown in FIG. 1), the first boom 3 is appropriately undulated and the second boom 4 is bent and stretched, and the tip of the second boom 4 is extended. Is located near the ground, the winch 5 lowers the hook block 8 to the ground, and the wire rope 7 is loosened. Then, the intermediate position of the wire rope 7 between the hook block hanging pulley 6 and the hook block 8 that has been lowered to the ground is laid around the rope guide 9 and the guide 10 using the slack of the wire rope 7. . The wire rope 7 should be turned around the rope guide 9 in a direction in which the wire rope 7 after being turned around is guided to the rear side of the second boom 4. Then, the hook block 8 is appropriately wound up by the winch 5, and the second boom 4 is folded. Next, the turning of the swivel base 2 is also used, and the first boom 3 is laid down along the traveling direction of the traveling vehicle body 1 (rearward in this example) to bring the folding boom A into 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. In the course of the above process, the hook block 8 suspended from the side surface of the second boom 4 with the rope guide 9 as a suspension portion is accommodated in the hook block accommodation portion mounted on the traveling vehicle body 1.

When the folding boom A is changed from the retracted state to the used state, the above operation may be reversed.

[0013]

[Effect of device]

 The hook block storage device of the mobile crane having the folding boom of the present invention configured and operating as described above has a simple configuration in which the rope guide 9 is simply attached to the second boom, but the folding boom A is stored in the stored state. It is not necessary to hang (engage) the wire rope 7 from the hook block suspension pulley 6 at the tip of the second boom when changing the state between the use state and the use state, and therefore the work efficiency of the mobile crane. It greatly contributes to the improvement of.

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

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a mobile crane embodying the present invention in which a folding boom is in a retracted state.

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

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

[Explanation of symbols]

 1 traveling body 2 swivel base 3 first boom 4 second boom 5 winch 6 hook block hanging pulley 7 wire rope 8 hook block 9 rope guide 10 guide 11 hook block housing

Claims (1)

[Scope of utility model registration request] 1. A first boom 3 having a base end attached to a swivel base 2 rotatably driven on a traveling body 1 so as to be able to move up and down, and a base end attached to a tip end of the first boom 3. Is a bending boom A composed of a second boom 4 mounted so that it can be flexibly extended and driven. In particular, a bending boom configured such that the belly surface of the second boom 4 is close to the belly surface of the first boom 3 when the second boom 4 is folded. The winch 5 to the first boom 3 provided with the boom A and arranged on the first boom 3 or the swivel base 2.
To the tip of the second boom 4 via the tip of the
With the wire rope 7 pulled out through the hook block suspension pulley 6 attached to the tip of the boom 4, the second
A hook block storage device for a mobile crane having a bending boom A formed by suspending a hook block 8 from the tip of the boom, the outside of the second boom 4 closer to the base end side than the hook block suspension pulley 6. A rope guide 9 is provided at a proper position so as to project outward from the side surface of the second boom 4, and the rope guide 9 capable of engaging and disengaging the wire rope 7 pulled out through the hook block suspension pulley 6 is provided. When the second boom 4 is in the folded state and the first boom 3 is lying down, the wire rope 7 is hung around the rope guide 9 and the rope guide 9 is used as a suspending portion to attach the hook block 8 to the side surface of the second boom 4. A hook block storage device for a mobile crane having a folding boom, which is configured to be hung.