JPH0333743Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a leg structure for a traveling crane, and more particularly, to a structure that allows the crane leg length to be adjusted. This is used in the field of correcting the tilt of a crane due to the sinking of a quay.

[Prior art]

For cranes installed on quays for cargo handling, etc., the level of the running rail is laid horizontally with respect to the reference line, and the crane moves on the running rail while maintaining a vertical posture, ensuring safe and safe cargo handling operations. Things are starting to run smoothly. However, if the quay is used for many years, the ground may sink or rise, and the running rails will also sink or rise as a result. Such a phenomenon may occur on the entire quay on which the running rail is laid, or it may occur on a portion of the quay where the quay is inclined to one side.

If wide rails for large cranes are installed on the quay, for example, if the rails on the sea side are lower than the rails on the mountain side, the stability of the crane will be hindered.
Smooth cargo handling operations will not be possible. Conventionally, to deal with this, cranes have been modified and quays have been renovated.

In cranes, efforts are being made to increase the height of the track itself that supports the running wheels, or to add long legs. These modification works not only stop the operation of the crane, but also involve many steps, resulting in large-scale work and increasing costs. On the other hand, the foundations of the quay require significant improvement work, which is even more difficult than modifying the crane.

[Purpose of invention]

This idea was created in view of the problems mentioned above.
The purpose of this is to make it possible to correct the crane's posture sequentially depending on the situation, to maintain stable posture and smooth operation, and to ensure the safety of the crane when the quay sinks. An object of the present invention is to provide a leg structure for a traveling crane that can simplify and speed up required work.

[Structure of the idea]

The features of the leg structure of the traveling crane of the present invention will be explained based on FIGS. A support member 10 supporting the rocker beam pin 9 is fitted into the opening 8 so as to be movable up and down, and a removable spacer 11 is interposed between the support member and the upper end 8a and lower end 8b of the opening. A cover 12 having a long hole 13 through which the rocker beam pin 9 can move and holding the support member 10 and the spacer 11 is removably attached to the opening edge 8c.

〔Example〕

The present invention will be explained in detail below based on the drawings showing the embodiments thereof. FIG. 2a is a configuration diagram of a traveling body 1 in a crane to which the present invention is applied, and as shown in the figure, for example, eight traveling wheels 2 are connected to a traveling track 3.
It is mounted on a shaft and installed on each leg of the crane. The traveling body 1 includes a traveling truck 3 and a rocker beam 4.
The running track consists of a track 3a that supports the two running wheels 2, and a balancer 3b that supports the two tracks so as to be swingable in the front and rear directions.
Two running trucks 3 are swingable in the front and rear directions 1
It is supported by two rocker beams 4. The track 3a, the balancer 3b, and the rocker beam 4 all have frames with a gate-shaped cross section as shown in FIG. It is designed to distribute the load of the crane without floating up.

Lower leg 7 to which such a running body 1 is attached
As shown in FIGS. 1a and 1b, a rectangular opening 8 is formed in the support member 10 for supporting a rocker beam pin 9 attached to the rocker beam 4 of the traveling body. Possibly fitted. The support member 10 includes a radial bearing for receiving the rocker beam pin 9, and has a rectangular shape that can slide up and down along the opening 8. An appropriate number of removable spacers 11 each having a thickness of, for example, about 10 cm are interposed between the support member and the upper end 8a and lower end 8b of the opening (four each in the figure).

A cover 12 is attached to the opening 8 that accommodates the support member 10 and the spacer 11 so as to sandwich the lower leg portion 7 from the front and back, thereby preventing them from falling off. The cover 12 has an elongated hole 13 through which the rocker beam pin 9 can be moved, as shown in FIG. 3, so that the same rocker beam pin 9 can be used regardless of the adjustment of the leg length. . Note that this cover is removably attached to the opening edge 8c with bolts or the like.

According to such a configuration example, as described below, the leg length can be adjusted according to the settling of the quay, etc., and the posture of the crane can be corrected.

The crane 16 installed on the quay 15 is shown in Figure 4a.
The vertical posture as shown by the solid lines in FIG. The crane 16, which is maintained in a vertical position, travels on the rails 6 along the quay 15 and moves to a desired position. The boom 17 is provided with a hanging device 19 that is moved by a trolley 18, and by raising and lowering the hanging device separately, it can be attached to a moored ship and the quay 15.
Loading work is carried out between the two. If the quay sinks or rises due to long-term use, for example, as shown by the broken line in Figure 4a, the rail 6A on the sea side will shift to the rail 6 on the mountain side.
B, and the crane 16 tilts.

If the operation of the crane 16 is hindered unless the inclination is reduced, the boom 17 can be leveled by, for example, changing the spacer 11 fitted in the opening 8 of the lower leg 7 vertically. In FIG. 5a, first, the opening edge 8c of the lower leg 7 on the sea side
The cover 12A covering the spacer is removed, and the required number of spacers 11 from below the support member 10 in the opening 8 are removed. A jack (not shown) is applied to the lower leg surface 7a to release the support from the traveling body 1, and the lower leg 7 is lifted to the extent that the boom 17 becomes approximately horizontal. A space is created above the support member 10, the removed spacer is pushed onto the spacer previously fitted on the support member, the jacks on the lower surface 7a are removed, and the outer cover 12A is attached. The load of the crane is transmitted from the legs to the support member 10 via the spacer 11 on the support member 10, and the load acting on the rocker beam pin 9 is supported by the rocker beam 4. Although the height position of the Rocker Beam pin 9 from the top surface of the rail 7 does not change, the Rocker Beam pin supports the leg further below, which is the same as the leg becoming longer as shown in Figure 5b. Become.

Conversely, when correcting the posture of the crane 16 by shortening the leg on the mountain side, the lower surface 7 of the leg on the mountain side
Jack up part a and lift it up a little to release the support from the traveling body. The cover 12A of the lower leg portion 7 is removed, and the required number of spacers 11 fitted on the support member 10 in the opening 8 are pulled out. Next, jacks are applied to both ends of the rocker beam pin 9, the removed spacer is lifted up by the thickness thereof, the spacer is pushed into the space created under the support member 10, and the cover 12A is attached.

[Effect of idea]

As explained in detail above, the present invention forms an opening in the lower part of the leg to which the traveling body is attached, and a support member that supports the rocker beam pin is fit into the opening so as to be able to rise and fall, and is inserted above and below the support member. Since a removable spacer is provided, the posture of the crane can be corrected in accordance with the amount of settling of the quay by simply replacing the spacer above and below the support member. Therefore, it is possible to maintain stable posture and smooth operation depending on the situation, and the work required for correction can be performed easily and quickly. In addition, a cover with a long hole through which the rocker beam pin can be moved is removably provided on the edge of the opening, so regardless of the position of the rocker beam pin, the same cover can be used to prevent the supporting member and spacer from falling off or misaligning. can do.

[Brief explanation of the drawing]

Figure 1a is a front view of the main part of the leg structure of the traveling crane of the present invention, Figure 1b is a sectional view taken along the - line in Figure 1a, Figure 2a is a front view of the traveling body, and Figure 2b is 3 is a perspective view of the cover,
FIG. 4a is an overall side view of the crane, FIG. 4b is an overall front view of the crane, FIG. 5a is a diagram of the leg structure in its initial state, and FIG. 5b is a diagram of the leg structure after correction. DESCRIPTION OF SYMBOLS 1... Running body, 4... Rocker beam, 7... Lower leg, 8... Opening, 8a... Upper end, 8b... Lower end, 8c... Opening edge, 9... Rocker beam pin, 10... Support member, 11... Spacer, 12
...Cover, 13...Long hole.

Claims (1)

[Scope of utility model registration request] An opening is formed in the lower part of the leg where the traveling body is attached to the crane leg, and a support member that supports a rocker beam pin attached to the rocker beam of the traveling body is fitted into the opening so as to be movable up and down, and the supporting member and the opening A removable spacer is interposed between the upper end and the lower end, and a cover having an elongated hole through which the rocker beam pin can move and holding the support member and the spacer is removably attached to the edge of the opening. The leg structure of a traveling crane is characterized by: