JPH11255476A - Traveling crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traveling crane capable of preventing a tumble in case that derailment is generated by an earthquake or the like. SOLUTION: A sea-side/land-side support leg 9, 10 respectively provided with a wheel a capable of rolling along a sea-side/land-side rail. 6, 7 is provided in a running part main unit 11 of a traveling crane 1, generally the land-side support leg 10 is formed in a structure of a pair of rigid legs relating to the running part main unit 11, and oppositely the sea-side support leg 9 is formed in a structure of a swivel leg pivotally supported capable of swiveling by a pivotal support pin 12 in parallel to each rail 6, 7 relating to the running part main unit 11. A stopper means 13 for preventing a tumble of the traveling crane 1 with the land-side support leg 10 approaching the sea-side rail 6 in the case of derailment of the wheel 8 of the land-side support leg 10 is provided inside at least the land-side rail 7 between the rails 6, 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling crane capable of preventing a fall due to a wheel derailment due to an earthquake or the like.

[0002]

2. Description of the Related Art Generally, a large traveling crane is used in a harbor or the like to load or unload cargo such as containers.

FIGS. 3 and 4 are schematic structural views showing a general structure of a traveling crane (container crane). FIG.
FIG. 4 is a view for explaining a state in which the traveling crane 1 comes off and collapses when an earthquake occurs, and thus the wheels 8 of the support legs 9 and 10 are disengaged from the rails 6 and 7. However, the conventional structure will be described below as a normal state.

[0004] The traveling section 3 of the traveling crane 1 is as follows. That is, on the quay 5 facing the port 4,
A seaside rail 6 and a landside rail 7 are provided, and the traveling part 3 of the traveling crane 1 has a seaside support provided with wheels 8 that can roll along the seaside rail 6 and the landside rail 7, respectively. It has a structure in which the leg 9 and the land-side support leg 10 are attached to the traveling unit main body 11.
In contrast, the sea-side support leg 9 is pivotally supported on the traveling section main body 11 by a pivot pin 12 parallel to each of the rails 6 and 7. It has a swing leg structure.

According to the above-mentioned structure, the vertical load and the horizontal load of the traveling crane 1 are supported by the land-side supporting legs 10 having the rigid leg structure, and only the vertical load of the traveling crane 1 is supported by the sea-side supporting legs 9 having the swinging leg structure. By having them support you,
When an earthquake occurs or a strong wind blows, the sea-side support leg 9 swings around the pivot pin 12, and the horizontal force due to the earthquake or wind is weakened on the sea side of the quay 5 where the foundation is weak and the strength is disadvantageous. I do not want to go to. In addition, by making the sea-side support leg 9 have a swinging leg structure, it is possible to absorb an error in the interval between the sea-side rail 6 and the land-side rail 7.

[0006]

However, the conventional traveling crane 1 as described above has the following problems.

That is, the traveling crane 1 which is a heavy object
When a large-scale earthquake occurs such that the legs of the traveling crane rise, the traveling crane 1 projecting greatly from the quay 5 toward the sea loses its balance and leans toward the sea. As a result, as shown in FIG. 3, the wheel 8 of the land-side support leg 10 having the rigid leg structure
From the ground side rail 7 to derail,
When the wheel 8 of the land-side support leg 10 slides and shifts away from the land-side rail 7, the distance between the lower ends of the land-side support leg 10 and the sea-side support leg 9 changes, as shown in FIG. As described above, the sea-side supporting leg 9 of the swinging leg structure is inclined obliquely around the pivot pin 12, and the traveling crane 1 falls down and falls into the sea, making restoration impossible or enormous cost for restoration. There is a fear that the damage may occur.

In view of such circumstances, the present invention prevents a horizontal force from being applied to the seaside of a quay, which has a weak foundation and is disadvantageous in terms of strength, and also prevents a fall even if a derailment occurs due to an earthquake or the like. It is an object of the present invention to provide a traveling crane that can perform the traveling.

[0009]

SUMMARY OF THE INVENTION To achieve the above object, the invention according to claim 1 comprises a sea-side support leg movable along a sea-side rail, and a land movable along a land-side rail. In a traveling crane having a side support leg and a traveling unit body, the land side support leg is prevented from approaching the sea side rail near the land side rail on the foundation upper surface between the land side rail and the sea side rail. A stopper means is provided.

[0010] In order to achieve the above object, a second aspect is provided.
The described invention is directed to a traveling crane in which a sea-side support leg movable along a sea-side rail and a land-side support leg movable along a land-side rail are attached to a traveling unit body. A stopper means for preventing approach of the land-side support leg and the sea-side support leg is provided near each of the land-side rail and the sea-side rail on the foundation upper surface between the base rail and the side rail.

Here, the stopper means may be, for example,
As described in (1), it is composed of a pair of upright members standing up at a required interval, and a bar-like member fixed between the upright members so as to be parallel to the rail.

According to the first aspect of the present invention, due to the occurrence of the earthquake, the wheels of the land-side support legs are lifted off from the land-side rails and are derailed inside the land-side rails, and the land-side support legs are moved to the sea side. If the user attempts to move, it comes into contact with the stopper means, and further movement is prevented. Therefore, it is possible to prevent the traveling crane from overturning even if the land-side support leg is derailed.

In the invention according to claim 2, the stopper means is provided near each of the land-side rail and the sea-side rail between the land-side rail and the sea-side rail, so that the wheel of the land-side support leg should be used. Even if both the wheels of the vehicle and the sea-side support legs are released, it is possible to prevent the land-side support legs and the sea-side support legs from approaching each other and prevent the traveling crane from falling over.

According to the third aspect of the present invention, the stopper means is simply constituted by a pair of upright members and a rod-shaped member.
There is no cost.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a traveling crane according to an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1 as viewed from the II-II direction.

Similar to the traveling crane 1 shown in FIGS. 3 and 4, the traveling section 3 of the traveling crane 1 is as follows. That is, a seaside rail 6 and a landside rail 7 are provided on a quay 5 facing the harbor 4, and the traveling portion 3 of the traveling crane 1 rolls along the seaside rail 6 and the landside rail 7. It has a structure in which a sea-side support leg 9 provided with a movable wheel 8 and a land-side support leg 10 are attached to a traveling unit main body 11. And the sea-side support legs 9 are
It has a swinging leg structure that is pivotally supported on the traveling unit main body 11 by pivoting pins 12 parallel to the rails 6 and 7.

The traveling crane 1 according to the present embodiment
The upper surface 16 between the sea side rail 6 and the land side rail 7
In the vicinity of the land-side rail 7, a stopper means 13 with which the land-side support leg 10 is in contact is provided. The stopper means 13 is fixed on a base plate 16a provided integrally with the land-side rail 7 on the foundation upper surface 16 as shown in FIGS.

The stopper means 13, as shown in FIG.
At a distance parallel to the land side rail 7, the base plate 1
6A, a pair of standing members 14 standing on the 6a and a bar-shaped member 15 fixed to the land rail 7 side of the pair of standing members 14 so as to be held in parallel with the land side rail 7.
The bar-shaped member 15 is provided so as to face the base of the land-side support leg 10.

The stopper means 13 is provided for the traveling crane 1.
In places where loading and unloading of loads performed by the mobile crane 1 are assumed, and where the traveling crane 1 is not used when the traveling crane 1 is not used.

According to the above-described configuration, due to the occurrence of the earthquake, the wheels 8 of the land-side support legs 10 float up from the land-side rails 7 and fall off inside the land-side rails 7.
When the sea 0 moves toward the sea side so as to approach the sea side rail 6, it contacts the stopper means 13 and further movement is prevented. Therefore, the traveling crane 1 is prevented from falling over even if the land-side support leg 10 is derailed.

As shown by broken lines in FIGS. 1 and 2, the land-side rail 7 between the land-side rail 7 and the sea-side rail 6.
And a stopper 13 near each of the seaside rails 6.
If the wheels 8 of the land support legs 10 are provided,
Even if both the wheels 8 of the sea-side support legs 9 are derailed, the land-side support legs 10 and the sea-side support legs 9 can be prevented from approaching each other, so that the traveling crane 1 can be prevented from tipping over, Safety can be improved.

[0023]

According to the first aspect of the present invention, due to the occurrence of the earthquake, the wheels of the land-side support legs are lifted off from the land-side rails and are derailed inside the land-side rails. Any attempt to move to the sea side abuts the stopper means, and further movement is prevented. Therefore, it is possible to prevent the traveling crane from overturning even if the land-side support leg is removed. As a result, collapse of the traveling crane can be prevented, and a traveling crane excellent in safety and reliability can be provided.

According to the second aspect of the present invention, the stopper means is provided near each of the land side rail and the sea side rail between the land side rail and the sea side rail.
Even if both the wheel of the land-side support leg and the wheel of the sea-side support leg are disengaged, the land-side support leg and the sea-side support leg can be prevented from approaching to prevent the traveling crane from tipping over. Thus, the safety of the traveling crane can be further improved.

According to the third aspect of the present invention, the stopper means is constituted by a pair of upright members and a rod-shaped member,
The structure can be simplified and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a traveling crane according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1 as viewed from the II-II direction.

FIG. 3 is a schematic diagram showing a state in which a traveling crane has lost a wheel due to an earthquake.

FIG. 4 is a schematic view showing a state in which a traveling crane collapses due to an earthquake.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling crane 3 Traveling part 4 Harbor 5 Wharf 6 Seaside rail 7 Landside rail 8 Wheel 9 Seaside support leg 10 Landside support leg 11 Running part main body 12 Pivot pin 13 Stopper means 14 Standing member 15 Bar member 16 Base upper surface

Claims (3)

[Claims] A traveling crane in which a sea-side support leg movable along a sea-side rail and a land-side support leg movable along a land-side rail are attached to a traveling unit body. A traveling crane provided with stopper means for preventing a land-side support leg from approaching a sea-side rail near a land-side rail on an upper surface of a foundation between the base rail and the side rail. 2. A traveling crane in which a sea-side support leg movable along a sea-side rail and a land-side support leg movable along a land-side rail are attached to a traveling unit body. A traveling crane provided with stopper means for preventing approach of the land-side support leg and the sea-side support leg near each of the land-side rail and the sea-side rail on the foundation upper surface between the base rail and the side rail. . 3. The stopper means comprises a pair of upright members standing at a predetermined interval and a bar-like member fixed between the upright members so as to be parallel to the rail. The traveling crane according to claim 1 or 2, wherein