JPH078553Y2 - Mobile crane - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a mobile crane having a boom having a telescopic function.

[Background of device]

Conventionally, a mobile crane as shown in FIG. 2 has been known. In the figure, 1 is a boom that can be lifted, retracted and swiveled in a crane vehicle, 2 is a cabin, 3 is a turntable, 4 is a hoisting cylinder, 5 is a hanging wire rope, and 6 is a boom receiver. By the way, although such a crane vehicle performs various works depending on its function, after the work is completed, the mechanism of the work vehicle is exerted to move to another place. At the time of this movement, the suspension wire rope 5 is stretched and fixed from the cabin 2 of the mobile crane to the rear part. However, both the cabin 2 and the hanging wire rope 5 are damaged. In particular, the damage on the cabin 2 side is conspicuous, and there is a drawback that the painting work must be carried out frequently.

[Disclosure of device]

An object of the present invention is to provide a mobile crane that is less likely to be damaged on the cabin side of the mobile crane and is also less likely to be damaged on the wire side of the mobile crane. An object of the present invention is a crane vehicle including a boom having a telescopic function, a boom receiver for storing and supporting the boom in the retracted state, and a suspension wire rope, wherein the boom receiver has a substantially intermediate portion. When a substantially V-shaped member bent downward is pivotally attached to the bent portion so as to be rotatable in a vertical plane about the bent portion, and the boom in the contracted state is stored and supported by the boom receiver. First, one end of the substantially V-shaped member is pushed down by the lower surface of the boom, and the other end is raised so that the hanging wire rope is lifted to the lower surface side of the boom.

【Example】

FIG. 1 shows an embodiment of a mobile crane according to the present invention. FIG. 1 (a) is a side view of the main part, FIG. 1 (b) is a plan view of the main part, and FIG. FIG. Reference numeral 11 is a boom, 12 is a boom receiver in which the boom 11 in a contracted state is stored for storage during movement, 13 is a hanging wire rope, and 14 is a cabin that controls traveling of a crane vehicle. 15a and 15b are installed in the cabin 14 from the middle of the column of the boom receiver 12.
It is a bracket provided so as to branch toward the upper side. 16 is a substantially V-shaped member in which a substantially middle portion is bent downward, and one end side 16a of the substantially V-shaped member 16 is configured in a substantially concave plate shape,
The other end side 16b is formed in a substantially U shape. However, the length ₁ of the one end side 16a is shorter than the length l _{2 of the} other end side 16b, and the weight of the other end side 16b is heavier than the weight of the one end side 16a. The bent portion of the substantially V-shaped member 16 is the bracket 15
It is axially supported so as to be rotatable in a vertical plane around the bent portion with respect to a and 15b. Therefore, the substantially V-shaped member 16 is rotated counterclockwise in FIGS. 1 (a) and 1 (c) in a working state in which the boom 11 is separated from the boom receiver 12 due to its weight relationship. The other end side 16b is close to the ceiling of the cabin 14, and one end side 16a is lifted up.
When 1 is stored on the boom receiver 12, the one end side 16a
Is pressed by the lower surface of the boom 11 to rotate the substantially V-shaped member 16 in the clockwise direction. When the crane vehicle is configured as described above, in the state where the boom 11 is arranged on the boom receiving body 12, the one end side 16a of the substantially V-shaped member 16 is pressed by the lower surface of the boom 11 and the one end side 16a is shown in FIG. )
Since the other end side 16b is lifted by being rotated in the clockwise direction as shown in Fig. 6, the hanging wire rope 13 is lifted by the other end side 16b and separated from the cabin 14, and the hanging wire rope 13 is It never touches 14. Since the hanging wire rope 13 is regulated by the recess 16a ₁ on the one end side 16a of the substantially V-shaped member 16, even if the hanging wire rope 13 is displaced to the left or right, the hanging wire rope 13
Does not come off from the other end side 16b of the substantially V-shaped member 16. Therefore, the accident in which the ceiling of the cabin 14 is rubbed by the suspension wire rope 13 and both the cabin 14 and the suspension wire rope 13 are damaged is largely resolved. Also the cabin
Since the 14 side is less likely to be damaged, the drawback that the ceiling 14 of the cabin 14 has to be frequently painted is solved.

【effect】

A mobile crane according to the present invention includes a boom having a telescopic function, a boom receiver for storing and supporting the boom in the retracted state,
A crane vehicle provided with a hanging wire rope, wherein the boom receiver has a substantially V-shaped member having a substantially middle portion bent downward so that the bent portion is rotatable about a bent portion in a vertical plane. When the boom in a contracted state is stored and supported by the boom receiver, one end of the substantially V-shaped member is pushed down by the lower surface of the boom and the other end is raised to raise the hanging wire rope. Since the boom is configured to be lifted to the lower side of the boom, one side of the substantially V-shaped member is rotated by being pressed by the lower side of the boom while the boom is arranged on the boom receiver, and the other side is lifted. Since the wire is lifted by the other end side and separated from the crane truck, the wire does not come into contact with the cabin of the crane truck, which damages the cabin and therefore the coating. It is those hard laborious such will have to, also has excellent effects such as hard damaged wire itself.

[Brief description of drawings]

FIG. 1 shows an embodiment of a mobile crane according to the present invention. FIG. 1 (a) is a side view of the main part, FIG. 1 (b) is a plan view of the main part, and FIG. FIG. 2 is a perspective view of the mobile crane for explaining the operation. 11 ... boom, 12 ... boom support, 13 ... hanging wire rope, 14 ... cabin, 15a, 15b ... bracket, 16 ... substantially V-shaped member, 16a ... one end side, 16b ... other end side.

Claims (1)

[Scope of utility model registration request] 1. A crane vehicle including a boom having a telescopic function, a boom receiver for storing and supporting the boom in the contracted state, and a suspension wire rope, wherein a substantially middle portion of the boom receiver is downward. A substantially V-shaped member bent at the center is pivotally attached to the bent portion so as to be rotatable in a vertical plane around the bent portion.
When the boom in the contracted state is stored and supported by the boom receiver, one end of the substantially V-shaped member is pushed down by the lower surface of the boom and the other end rises to bring the suspension wire rope to the lower surface side of the boom. A crane vehicle characterized by being configured to be lifted.