JP3368489B2 - Construction Machine Weight - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weight to be mounted on a rear end portion of an upper swing body of a construction machine such as a crane, an excavator and a pile driver.

[0002]

2. Description of the Related Art A construction machine, for example, a pile driving machine has a structure as shown in FIG. In the figure, track 1
And the upper revolving structure 2 which is rotatably supported on the crawler belt 1.
A driver's cab 3 arranged on the upper swing body 2, a reader 4 arranged at one end of the upper swing body 2, and a reader 4 arranged between the other end of the upper swing body 2 and the leader 4. A back stay 5 for supporting the auger, an auger drive device 6 suspended from the upper end of the leader 4, an auger 7 suspended from the auger drive device 6, and the upper swing body 2
A weight 8 is mounted on the other end of the.

As shown in FIG. 8, the weight 8 includes a weight 8A having a relatively wide width and a weight 8B having a relatively narrow width. When the weight 8B is removed from the machine and placed on the ground before it is mounted on the construction machine or before it is unloaded from the construction machine and reloaded into a vehicle for transportation, etc. The weight 8B may fall, which is extremely dangerous.

Therefore, the weight 8B is relatively narrow.
Etc. Even if it is a short time, put it in a state of lying down so that the end face is on the bottom. This operation is, as shown in FIG. 9, a method in which the lower end of the weight 8B suspended by a crane is grounded, and then the crane is moved in the direction in which the weight 8B is desired to be tilted, and the weight 8B is tilted and unwound.
As shown in FIG. 10, the weight 8 suspended by a crane
After the lower end of B is grounded, a worker pushes the upper part of the weight 8B to lower the crane while inclining the weight 8B.

[0005]

However, the method shown in FIG. 9 complicates the operation of the crane. In the method shown in FIG. 10, the weight 8B having a weight of 5000 kg is used.
Tilting can be a daunting task. Further, in any of the methods, if the weight 8B is not sufficiently grounded, there is a possibility that the weight 8B may behave in an unexpected manner and the crane may be overturned or damaged, or the worker may be injured. is there.

In view of the above circumstances, it is an object of the present invention to provide a weight of a construction machine which can be easily laid down when the weight is unloaded from a construction machine or a vehicle for transportation.

[0007]

In order to achieve the above object, in the present invention, the weight is lifted to the upper end portion.
There is a metal fitting for the weight, and the lower end surface of the weight
An arc at a position displaced from directly below the center of gravity to one end face side
A plate with a circular protrusion is formed, and a hanging hole is formed in the plate.
When the weight suspended by the crane comes into contact with the ground, it is made to fall in the direction guided by the plate which is the tilt guide member.

[0008]

Further, the tilting direction is displayed on one or both of the end surface and the side surface of the weight so that the direction in which the suspended weight is tilted can be identified.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention, in which a weight 8B is formed with a positioning groove 9 for mounting on a construction machine, a metal fitting 10 for lifting by a crane and a tilt guide. A plate 11 is attached. As shown in FIG. 2, the tilt guide plate 11 has an arcuate projection formed at a position deviated by a dimension 1 from immediately below the center of gravity W of the weight 8B.

With such a structure, as shown in FIG. 3, when the crane is hung on the ground, the tilt guide plate 11 first comes into contact with the ground. In this state, when the lifting force of the crane is loosened, the ground contact position of the tilt guide plate 11 is deviated from immediately below the center of gravity of the weight 8B, so that M = W · l,
And the weight 8B tilts.
Therefore, the weight 8B can be laid down simply by suspending the weight 8B with the crane.

FIG. 4 shows a second embodiment of the present invention in which the tilt guide plate 11 is provided with a hanging hole 11a. In this way, the tilt guide plate 11 has the hanging holes 11
By forming a, the weight 8B can be loaded and unloaded on the vehicle for transportation with the metal fitting 10 and the hanging hole 11a of the tilt guide plate 11 being used while the weight 8B is laid down. It is convenient for workability and safety measures.

FIG. 5 shows a third embodiment of the present invention, which is an example in which a pipe 12 is used as a tilt guide member. Even with such a configuration, the same effect as in each of the above-described embodiments is obtained. Can be obtained.

FIG. 6 shows a fourth embodiment of the present invention, in which a pipe 12 as a tilt guide member and the pipe 1 are provided.
This is an example using a guide 13 fixed to 2. With such a configuration, the behavior of the weight 8B in the initial stage of the inclination can be stabilized.

According to the weight 8B shown in each of the above-described embodiments, the weight 8B has a constant inclination, so that
It is more preferable for safety to display characters, symbols, or coloring indicating the tilt direction on one or both of the side surface and the end surface of the weight 8B.

[0016]

As described above, according to the present invention, in the weight of the construction machine mounted on the rear end of the upper swing body, since the tilt guide member is provided on the lower end surface of the weight, the weight is placed on the ground. The weight can be easily laid down when lowered or placed on a vehicle for transportation. Further, when the weight is laid down, the tilting direction of the weight is constant, so that the work is easy and the safety can be secured.

[Brief description of drawings]

FIG. 1 is a front view of a weight according to the present invention.

FIG. 2 is an enlarged side view showing a main part of the weight according to the present invention.

FIG. 3 is a side view showing a state where the weight according to the present invention is suspended.

FIG. 4 is a side view showing a second embodiment of the weight according to the present invention.

FIG. 5 is a side view showing a third embodiment of the weight according to the present invention.

FIG. 6 is a side view showing a fourth embodiment of the weight according to the present invention.

FIG. 7 is a side view showing an example of a construction machine.

FIG. 8 is an enlarged side view showing a state in which the weight is mounted on the construction machine.

FIG. 9 is a side view showing a conventional weight tilting method.

FIG. 10 is a side view showing another example of the conventional weight tilting method.

[Explanation of symbols] 8B weight 11 Tilt guide plate 11a hanging hole 12 pipes 13 Guide

Claims (2)

(57) [Claims] 1. A weight of a construction machine to be mounted on a rear end of an upper revolving structure, wherein a lifting metal fitting is provided on an upper end portion of the weight, and a lower end surface of the weight is provided directly below a position of a center of gravity of the weight. A weight for a construction machine, wherein a plate having an arc-shaped projection is provided at a position displaced to one end face side, and a hanging hole is formed in the plate. 2. The weight of a construction machine according to claim 1, wherein a tilting direction is displayed on one or both of an end surface and a side surface of the weight.