JPH075005B2 - Track work machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a track work machine used for repair work on a railroad track and its surroundings, for example.

[Prior Art] Conventionally, as a track working machine of this type, a structure shown in FIG. 6 has been known.

In this conventional structure, the working machine body 1 is composed of a lower traveling machine body 1a and an upper traveling machine body 1b, and the upper traveling machine body 1b is connected to the lower revolving machine body 1a so as to be capable of revolving around a revolving shaft 1c, and in this case, an excavator having a shovel 2a. Equipped with a system excavation mechanism 2, on both sides of the lower traveling body 1a, crawler tracks 3 driven by hydraulic motors are arranged, and the lower traveling body is also provided.
The swing arm 5 is pivotally attached to the front and rear positions of 1a by the fulcrum shaft 4,
The swing arm 5 is provided so as to be swingable up and down by a hydraulic cylinder 6, and each swing arm 5 is provided with wheels 7 for running on a rail which are driven by a hydraulic motor on both left and right sides.

During work, however, the swing arm 5 is raised to raise the wheels 7 as shown by the imaginary line, and the track 3 is placed on the ground on the side of the rail 8 on both sides of Japan. When performing track replacement work, or traveling on rails 8 to move places, the swinging arm 5 is lowered to mount the wheels 7 on the rails 8 and the track 3 from the ground as shown by the solid line. The wheels 7 are separated from each other, and the wheels 7 are driven in this state to run on the rail.

[Problems to be Solved by the Invention] However, in the case of the above-described conventional structure, when traveling on the rail 8, the structure is such that the wheels 7 are mounted on the rail 8 and the working machine body 1 is floated on the rail. This means that the hydraulic cylinder 6 travels with the entire weight of the working machine body 1 applied, and the hydraulic cylinder 6 inevitably has an oil leak other than an inherent failure. There is a possibility that the working machine body 1 may drop and the bottom surface of the working machine body 1 may come into contact with the rails 8 and the like, and even in the case of a structure other than a hydraulic cylinder, the working machine body 1 may descend due to a load applied to it. There is a serious inconvenience that a large accident may occur because the working machine body 1 travels with a large inertial force.

[Means for Solving the Problem] The present invention is intended to solve such inconvenience, and the gist thereof is that a working machine body is provided with a track for track traveling and wheels for traveling on track, The crawler belt is arranged so as to be movable up and down by a vertical movement mechanism, and as the crawler belt is lifted, the working machine body is lowered, the wheels are placed on the rail, and the crawler belt is separated from the ground, so that the crawler belt is lowered. Thus, the working machine body is raised, the crawler belt is grounded, and the wheels are configured to be separated from the rail track.

[Operation] As the track is lifted by the vertical movement mechanism, the work machine descends, the wheels are placed on the rail, and the track separates from the ground.
Further, as the crawler belt descends, the work machine body ascends, the crawler belt comes into contact with the ground, and the wheels separate from the rail.

[Embodiment] FIGS. 1 to 5 show an embodiment of the present invention.

The same reference numerals are used for the same mode parts as those of the conventional structure shown in FIG.

Reference numeral 1 denotes a working machine body including a lower traveling machine body 1a and an upper traveling machine body.
1b, the upper traveling body 1b has a swing axis on the lower swing body 1a.
It is installed so that it can rotate around 1c, in this case the shovel 2a
The excavator-based excavation mechanism 2 having

Reference numeral 7 denotes wheels, which are arranged on the front, rear, left and right sides of the lower traveling vehicle body 1a and are driven by a hydraulic motor (not shown).

Reference numeral 9 denotes an up-and-down moving mechanism. In this case, a supporting member 10 is provided on both left and right sides of the lower traveling body 1a so as to be vertically swingable by a supporting shaft 11, and a vertically moving cylinder 12 is provided on both side surfaces of the lower traveling body 1a.
In this case, the rod 12a of the hydraulic cylinder is pivotally mounted by the mounting shaft 13, the base of the vertical movement cylinder 12 is pivotally mounted by the mounting pin 14 in the middle of the supporting member 10, and the track body 15 is arranged on each supporting member 10. A hydraulic motor is installed in the track body 15, and the hydraulic motor and the hydraulic pump provided in the lower traveling machine body 1a are connected by a hydraulic hose, and the track body 15, in this case a rubber crawler, is hung around the track body 15. I am configuring.

Since this embodiment has the above-mentioned structure, at the time of work, the supporting member 10 is lowered by the vertical movement mechanism 9 to ground the crawler belt 3 and the wheels 7 are separated from the two rails 8 as shown in FIG. For example, excavation work, railroad track replacement work, etc.
The crawler belt 3 shown in FIGS. 5 to 5 is lifted by the vertical movement mechanism 9 to mount the wheel 7 on the two rails 8 and the crawler belt 7 is separated from the ground S, and the wheel 7 is driven in this state to drive the rail tracks. I will drive.

Therefore, when traveling on the rail 8, the structure is such that the crawler belt 3 is traveling with the crawler belt 3 raised, and contrary to the conventional structure, the vertical movement cylinder 9 of the vertical movement mechanism 9 causes the working machine body 1 to move. Since the vehicle will travel with the entire weight of the wheels 7 applied without applying weight, since the wheels 7 are provided on the work machine body 1, the work machine body 1 does not descend, and therefore safety during rail running is improved. Can be increased.

In the meantime, when working, the working machine body 1 floats, contrary to the above-mentioned conventional structure, and the vertical movement cylinder 9 of the vertical movement mechanism 9 is loaded with the entire weight of the working machine body 1. For example, the working machine body is unavoidably leaked with oil. Although there is a possibility that 1 will descend and come into contact with the ground, the operator is usually on the work machine body 1 at the time of work, and the operator may notice the work machine body 1 itself descending, or the work machine body may be detected by a height sensor or the like. It is possible to make the operator notice by detecting the descent of No. 1 and displaying a warning, and even if the working machine body 1 is grounded, the working machine body 1 is in a non-running state and prevents a serious accident. be able to.

The vertical movement mechanism 9 has a structure using a hydraulic cylinder, but other cylinder mechanisms or structures other than the cylinder mechanism may be adopted. The vertical movement mechanism 9 swings the crawler belt 3 vertically. Although the link structure is used, the crawler belt 3 may have a structure other than the swinging motion such that the crawler belt 3 moves vertically up and down.

[Advantages of the Invention] As described above, the present invention has a structure in which, when traveling on a rail, the rail travels with the crawler belt being raised. Therefore, the vertical movement mechanism does not apply the weight of the working machine body to the wheels. Since the vehicle is traveling with the entire weight applied and the wheels are provided on the working machine body, the working machine body does not descend, and therefore, the safety during rail travel can be improved.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a plan view in which an upper traveling body is omitted, FIGS. 2 and 3 are partially enlarged lateral views thereof, and FIG. 4 is a partial lateral view thereof. Figure 5 is its side view,
FIG. 6 is a side view of the conventional structure. 1 ... Work vehicle, 3 ... Crawler track, 7 ... Wheels, 8 ... Railway, 9 ... Up / down movement mechanism.

Claims (1)

[Claims] 1. A work machine body comprising a track track for running on the ground and wheels for running on a rail, the track track being arranged so as to be movable up and down by a vertical movement mechanism, and the work machine body being lowered by raising the track track. The wheel is mounted on the rail and the crawler track is separated from the ground, and the work body is raised by the descent of the crawler track to ground the crawler track and the wheel is separated from the track. Orbital work machine characterized by.