JPH0747436Y2 - Wheel crane - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel crane having an improved boom rest structure for fixing a boom that has been laid down during traveling in the width direction of the boom.

[0002]

2. Description of the Related Art In FIGS. 5 and 6, L is an undercarriage, 1
Is a traveling body frame of the lower traveling body L, and an upper revolving structure U is rotatably mounted on the traveling body frame 1. The upper revolving structure U has a basic boom 2a and movable booms 2 of a plurality of stages.
A telescopic boom 2 composed of b is provided so as to be able to rise and fall.
3 is a boom hoisting cylinder, 4 is a cabin that is used both during crane work and during traveling, and the cabin 4 is provided on the upper swing body U side by side on the right side of the boom 2 when viewed from the front of the crane.

In such a wheel crane,
In order to prevent the boom 2 from turning due to the shaking of the vehicle body or the inclination of the road during traveling, the boom 2 is laid on the front end portion of the traveling body frame 1 in the lying direction (boom width direction).
There is a boom rest 5 fixed in position.

The boom rest 5 is provided on both left and right sides of the center line of the boom 2 in the lying state, and the boom 2 (basic boom 2a) is sandwiched between the boom rests 5 and fixed in the width direction. Has become. Reference numeral 6 is a bumper attached to the front end of the traveling body frame 1.

[0005]

In the conventional wheel crane, the boom rests 5 and 5 are fixed to the traveling body frame 1 and are always projected on the frame 1, so that There was such a problem.

In the wheel crane, by utilizing the self-propelled function, (a) traveling with the material etc. loaded with the front part of the traveling body frame 1 as a loading platform while the boom is raised at the work site (loading traveling) (B) Since the position where the load is hung and the position where the load is hung are far apart, the hanging load is shaken or falls when performing so-called hanging load traveling in which the load is hung and traveling inside the site. There may be a case where the user wants to travel (temporary suspended load travel) with the suspended load placed on the traveling body frame 1 so as not to do so.

However, in most conventional cranes, the boom rests 5 and 5 interfere with each other, so that the traveling body frame 1 cannot be used as a loading platform or a temporary loading platform for suspended loads. For this reason, the above-described load traveling cannot be performed, and the suspended load traveling can be performed only in an unstable state in which the load is suspended.

[0008] It is conceivable that a stock is placed on the boom rests 5 and 5 or higher and a load is placed on the stock during travel of such a load or a suspended load. It is not practical because each removal work is very troublesome and the work efficiency deteriorates.

Another problem is that the boom 2 is sandwiched by a pair of pedestal type boom rests 5 and 5 from the left and right sides, so that the side surface of the boom 2 is peeled off by contact with the boom rests 5 and 5. However, it was supposed to cause the generation of rust.

In view of the above, according to the present invention, the boom rest does not obstruct the above-described loading traveling or traveling of a suspended load, and the traveling body frame can be utilized as a loading platform or a temporary placing platform for suspended loads, and the boom rest can be used. The purpose of the present invention is to provide a wheel crane in which there is no risk of the boom painting coming off.

[0011]

According to a first aspect of the present invention, an upper revolving structure is mounted on a traveling body frame of a lower traveling structure, and the upper revolving structure is capable of hoisting and is in a forward laid state when traveling by a crane. In the wheel crane in which the boom to be set and the cabin are arranged side by side when viewed from the front, at the position on the front part of the traveling body frame, which is located on the cabin installation side more than the boom during crane traveling, -Shaped boom rest moves between an operating position that projects above the upper surface of the traveling body frame and fixes the boom in the boom width direction in the lying state, and a retracted position that retracts below the upper surface of the traveling body frame. On the other hand, the boom is provided with a bracket protruding toward the cabin installation side. In which the fixing hole which the boom rest is writing fits is provided.

According to a second aspect of the present invention, in the structure of the first aspect, a boom rest is provided rotatably around a horizontal axis between an operating position and a storage position, and the boom rest is fixed at the operating position. It is equipped with means.

According to a third aspect of the present invention, in the structure of the first aspect, the boom rest is provided so as to be movable up and down between the working position and the storage position, and the boom rest is provided with fixing means for fixing the boom rest at the working position. It will be.

[0014]

According to the above construction, the boom rest is moved from the operating position to the retracted position during loading traveling or traveling with a suspended load, so that the boom rest is removed from the upper surface of the traveling body frame and the frame is temporarily placed on the platform or the suspended load. It can be used as a stand.

Further, since the boom rest is formed in a pin shape and the boom rest is fitted in the fixing hole of the boom side bracket, when a conventional pedestal type boom rest in which the boom is sandwiched from both left and right sides is used. The problem that the paint on the side surface of the boom peels off due to contact with the boom rest, which causes rust, is eliminated.

Furthermore, since the structure is simple and small, and the boom rest is light in weight, it is easy to change the position of the boom rest. Moreover, the boom rest and the bracket with the fixing hole are installed in the cabin more than the boom during crane traveling. Since it is provided on the traveling body frame and the boom at a position deviated to the side, the fitting state of the boom rest into the fixing hole can be visually confirmed from inside the cabin. Therefore, the position of the boom can be easily adjusted during traveling of the crane, and the boom fixing action can be reliably performed.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS.

In each figure, the same parts as those in FIGS. 5 and 6 are designated by the same reference numerals, and the duplicated description thereof will be omitted.

First Embodiment (see FIGS. 1 to 3) A pin-shaped boom rest 8 is provided on the front end surface of the traveling body frame 1 via brackets 7 and 7.

The boom rest 8 includes brackets 7, 7
On the other hand, the lower end is pivotally supported by a horizontal shaft 9 in the left-right direction, and the upper end of the horizontal shaft 9 is projected above the upper surface of the traveling body frame 1 in a vertical state as shown by solid lines in FIGS. 1 and 2. It is possible to turn up and down between an operating position and a storage position in which the bumper 6 is laid down and retracted below the upper surface of the frame as shown in phantom lines in FIG. 2 and in FIG.

In addition, the boom rest 8 and the bracket 7
Is provided with a pin hole (not particularly denoted by reference numeral) that coincides with the operating position, and the boom pin 8 is fixed to the operating position by inserting the fixing pin 10 across both pin holes. It

On the other hand, on the boom 2, a bracket 12 having a fixing hole 11 is fixed to the tip end of the basic boom 2a, and the boom rest 8 is in a boom lying state during traveling of the crane.
The upper end portion 8a of the is fitted into the fixing hole 11 of the bracket 12 from below. As a result, the boom 2 is positionally fixed in the width direction, and an unexpected turning during traveling is prevented.

Here, the boom rest 8 and the bracket 12 are viewed from the cabin 4 side more than the boom 2 during crane traveling so that the fitting state of the boom rest 8 into the fixing hole 11 can be visually confirmed from the inside of the cabin 4. It is attached to the traveling body frame 1 and the basic boom 2a (outer surface of the right side slope) at a position separated from the cabin installation side (right side).

Since the boom 2 is held in the laid-down state by the boom hoisting cylinder 3, the boom rest 8 does not have to support the boom load, and it suffices if it is fitted into the fixing hole 11.

According to the above construction, the boom rest 8 can be stored in a position retracted downward with respect to the upper surface of the traveling body frame 1 as needed, so that the traveling body frame 1 can be stored on site.
The boom rest 8 is an obstacle during loading traveling in which materials or the like are loaded on top of it, or during suspended loading temporary placement traveling in which the load W is temporarily placed on the same frame 1 as shown in FIG. Therefore, the entire front portion of the traveling body frame 1 can be utilized as a loading platform or a temporary placement platform for suspended loads.

The pin-shaped boom rest 8 is attached to the boom 2
The boom 2 by fitting it into the fixing hole 11 of the side bracket 12
The boom 2 is fixed as shown in Figs.
There is no problem that the paint on the side surface of the boom peels off due to contact with the boom rests 5 and 5 and causes rusting, as in the case of using the conventional gantry-type boom rests 5 and 5 that sandwich the left and right sides.

Further, since the structure is simple and compact due to the simple pin system, and the boom rest 8 is light in weight, the position changing operation can be facilitated.

Second Embodiment (Refer to FIG. 4) Only differences from the first embodiment will be described.

In the first embodiment, the boom rest 8 turns up and down between the working position and the retracted position, whereas in the second embodiment, the pin-shaped boom rest 8 remains in the vertical position. It is configured so that it can be moved up and down between a retracted position and an upper surface of the traveling body frame 1.

That is, the boom rest 8 moves up and down along the cylindrical sleeve 13 fixed to the front end surface of the traveling body frame 1, and is held in the same position by the detachable fixing pin 14 in the working position.

Below the boom rest 8, an escape hole 15 is provided in the bumper 6 and a receiving plate 16 is provided on the traveling body frame 1.
Are provided respectively, and at the time of storage, the fixing pin 14 is pulled out to lower the boom rest 8 from the operating position, and the escape hole 15 is provided.
It is configured so that it can be supported by the receiving plate 16 in a state of penetrating.

With the structure of the second embodiment, basically, the same effect as that of the first embodiment can be obtained.

By the way, in the above embodiment, the boom rest 8 and the bracket 12 are arranged on the right side of the boom 2 during traveling of the crane. However, when the cabin 4 is arranged on the left side of the boom 2, they should be arranged on the left side of the boom. Good.

[0034]

As described above, according to the present invention, the boom rest is moved from the working position to the retracted position during loading and hanging loads to remove the boom rest from the upper surface of the traveling body frame. It can be used as a loading platform or temporary platform for suspended loads. That is, it becomes possible to carry out a load traveling which is conventionally impossible in many cases, and a safe suspended load traveling in which a suspended load is temporarily placed on a traveling body frame for traveling.

Further, since the boom rest is formed in the shape of a pin and the boom rest is fitted in the fixing hole of the boom side bracket, when a conventional pedestal type boom rest in which the boom is sandwiched from the left and right sides is used. The problem that the paint on the side surface of the boom peels off due to contact with the boom rest, which causes rust, is eliminated.

In addition, the structure is simple and small, and
Since the boom rest is lightweight, it is easy to change its position.

Moreover, since the boom rest and the bracket are provided on the traveling body frame and the boom at positions separated from the cabin installation side with respect to the boom when the crane is traveling, the fitting state of the boom rest into the fixing hole is determined by the inside of the cabin. It can be visually confirmed from. Therefore, the position of the boom can be easily adjusted during traveling of the crane, and the boom fixing action can be reliably performed.

[Brief description of drawings]

FIG. 1 is an end view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an overall side view of the wheel crane according to the embodiment.

FIG. 4 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.

FIG. 5 is an overall side view of a conventional wheel crane.

6 is an end view taken along line VI-VI of FIG.

[Explanation of symbols]

L Lower traveling unit U Upper revolving unit 1 Traveling unit frame 2 Boom 8 Pin-shaped boom rest 9 Horizontal axis that is the center of rotation of the boom rest 10,14 Pins (fixing means) for fixing the boom rest in the working position 12 Boom side Bracket 11 Fixing hole for the bracket

Claims (3)

[Scope of utility model registration request] 1. An upper revolving structure is mounted on a traveling structure frame of a lower traveling structure, and the upper revolving structure is movable up and down and is closed.
A boo that is set in a forward prone state when driving in the lane
And as a cab for both crane work and traveling
In mobile crane provided side by side and cabin is also used to see from the front, the than the boom during the crane traveling definitive in front of the running body frame
A pin-shaped boom rest protrudes above the upper surface of the traveling body frame at a position deviated to the side where the cabin is installed, and an operating position for fixing the boom in the boom width direction in a lying state, and a position above the upper surface of the traveling body frame. while Ru is movable between a storage position retracted downward, bracket boom
Is installed on the side where the cabin is installed.
On the racket with the boom lying down while the crane is traveling.
A wheel crane characterized in that a fixing hole into which a mrest is fitted is provided . 2. The wheel crane according to claim 1, wherein the boom rest has a horizontal shaft between an operating position and a storage position.
It is pivotally mounted around this boom rest
Mobile crane, characterized in Rukoto such comprises a fixing means for fixing in position. 3. A mobile crane according to claim 1 Symbol placement, elevation transfer between a storage position boom rest is the working position
Rotatably the provided mobile crane characterized by comprising comprises a fixing means for fixing the boom rest at the working position.