JPS6320963B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a track bed changing machine used for partial replacement of railway track beds.

In general, on railway trackbeds, the surface directly below the sleepers hardens due to mud blowing caused by rail vibration and other causes.
It begins to lose its elasticity in ~8 years. If the track bed solidifies and loses its elasticity, not only will the ride comfort of the vehicle deteriorate, but there is also the risk of track deviation.
Therefore, if compaction occurs on the roadbed, it is necessary to replace the gravel as soon as possible.

Up until now, most of the partial replacement of railway trackbeds has been carried out manually, but as it has become increasingly difficult to secure labor, some railways have A method of replacing the trackbed using a hydraulic shovel has been introduced. In other words, the trackbed is replaced by removing all the sleepers in a section of about 20 meters at once and using a hydraulic shovel to shovel gravel in the direction of the rails.

However, the above-mentioned construction method has the major drawback of being prone to rail misalignment and overhang accidents.
It is simply impossible to use this method in important line sections such as the Shinkansen.

Therefore, the Applicant is now able to mechanically replace the track bed, which had previously been done with a hand moat, and
We developed a hydraulic excavator that could be used on important railway lines such as the Shinkansen without any risk of track deviation, and released it to the public as Special Publication No. 1984-41842.

1 and 2 show an outline of the hydraulic excavator according to the above-mentioned Japanese Patent Publication No. 53-41842, in which arms 2, 3, 4, cylinder 5,
A column 7 is pivotally supported via a column 6 so that it can be vertically and
Upper support frame 8, sub-support support 9 and cylinder 1 to both sides of
It is constructed by disposing shovels 12, 12 via pins 0 and 11 so as to be openable and closable.

When partially replacing the trackbed using the hydraulic excavator, first the mobile vehicle 1 is towed by a self-propelled or motor-driven rail truck to the trackbed replacement point, and then one sleeper is tightened. Loosen the vault of the tool and deviate it to the position of the adjacent sleeper, scoop out the gravel on one side of the created space with the shovels 12, 12 holding the rail 13 from both sides, and do the same on the other rail. After scooping up the gravel on the 13th side, the sleeper that was deviated earlier is returned to its original position and tightened and fixed to the rail, and the other sleepers adjacent to it are loosened and the sleepers that were tightened and fixed are The sand and gravel in the new space are removed in the same manner as above. By repeating the above operations,
The trackbed in the required sections will be replaced one after another.

When replacing the trackbed manually, the tip of the shovel can be easily moved into the consolidated gravel by lowering the head of the shovel with one foot and swinging the upper part of the handle back and forth. It is possible to penetrate into the body and scoop it out. That is, by rocking the cutting edge back and forth, left and right, some of the gravel that acts as static resistance for the cutting edge is rotated, making it easier for the cutting edge to penetrate. This type of shovel operation has been acquired through the accumulation of experience of workers over many years, and does not change even in mechanized work.

However, in the hydraulic excavator according to Japanese Patent Publication No. 53-41842, the dimensions of the column, upper support frame 8, and sub-column 9 are extremely short compared to the dimensions of the shovel 12, and the cylinder 10 and cylinder The shovel 12 is supported by the support column 7 at 11, and the shovel structure is such that it "grips" or "grabs" sand and gravel from both sides by the action of both cylinders 10 and 11. As a result, by swinging the tip of the boom 4 from side to side, the shovel 12
It is almost impossible to give any vibration to the cutting edge.

On the other hand, the degree of consolidation of railway trackbeds always fluctuates even within a predetermined section where trackbed replacement is to be performed, and there are some areas where the consolidation is particularly strong. Therefore, when working with a large shovel to improve work efficiency, when encountering a particularly firmly consolidated area as described above, conventional excavators have to move the shovel tip into the track bed. unable to penetrate,
The drawback was that the gravel had to be removed by replacing it with a small shovel or by hand.

Also, since the work is under overhead wires, the shovel 12
Shovel 12 was difficult to lift upward.
cannot make full use of the falling force. As a result, there is a major drawback in that simply pressing the shovel 12 downward with the tip of the boom 4 makes it difficult to sufficiently dig the shovel cutting edge into the solidified trackbed.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the hydraulic excavator, and even when a particularly firmly consolidated roadbed portion is encountered during work, the shovel tip can be moved forward, backward, left and right. By having a configuration that allows the shovel to be pushed down while swinging in any direction, the cutting edge of the shovel can fully dig into the hardened roadbed, improving efficiency, and also pulling the shovels on both sides in a nearly horizontal state. The purpose of this project is to provide a railway bed changing machine that makes it possible to change railway trackbeds.

Hereinafter, the details will be explained based on an embodiment of the present invention shown in FIGS. 3 to 6. Note that the present invention is not limited only to the configuration of the embodiments,
The structure may be modified as appropriate without departing from the spirit of the invention.

FIG. 3 is a side view of the bed changing machine according to the present invention, and FIG. 4 is a plan view thereof. The roadbed changing machine A is mainly composed of a hydraulic work vehicle body and a gate-shaped excavating and scooping device C attached to the boom tip of the work vehicle body B.

The hydraulic work vehicle main body B is composed of a caterpillar type truck 14, a support boom 15 rotatably mounted on the truck 14, a driving hydraulic unit 16, etc., and is supported by the operation of a cylinder 17. The boom 15 is raised and raised, and the boom tip 15a is extended and contracted by cylinder operation.

In this embodiment, the work cart 14 is a self-propelled caterpillar type vehicle, but it may also be a motor-driven work cart 14 that runs on rails.
Alternatively, it is of course possible to use a tire running type work cart.

As shown in Fig. 5, the excavating and scooping device C is constructed by attaching the upper ends of columns 19, 19, which are vertically arranged in parallel at regular intervals, to both ends of a support rod 18 that is slightly longer than the rail width. The inner upper part of the shovel 20, which has cutting edges 20a facing each other at the lower end thereof, is rotatably supported in the left-right direction of the truck 14, and Each pillar 1
Main cylinders 21, 21 for pulling the shovel are installed in the lower parts of the 9, 19 and in the center of the support rod 18, and
Shovel rotation cylinders 24 and 24 are connected to support shafts 2 and 24 via links 22 and 23, respectively, between the upper part of each support column 19 and the outer upper part of the shovel 20.
5 and 26. 27, 27... are respective support shafts. Further, in the center of the support rod 18, a support fitting 28 is rotatably attached to support the excavating and scooping device C on the tip 15a of the support boom 15 so as to be rotatable in the longitudinal direction of the truck 14. The support fitting 28 is suspended from the tip 15a of the support boom 15 by a support pin 29. In addition, both the pillars 19,
The length of the support rod 19 is selected to be about 1.5 to 2.0 m, and the length of the support rod 18 is also selected to be about the same.

FIG. 6 shows the mounting structure of the shovel 20, the support column 19, and the shovel rotation cylinder 24. The tip of the link 23 is pivoted to the upper outer side of the shovel by inserting a support pin 25b into an outer mounting hole 20c of a mounting bracket 20b fixed above the shovel. Also, the inner mounting hole 20 of the mounting bracket 20b
A second support shaft 25c of the support column 19 is inserted through the hole d, whereby the upper inner side of the shovel 20 is pivotally supported by the support column 19.

As shown in FIG. 6, the link 23 has its tip widened in the lateral direction, and is configured to have sufficient strength against shaking in the rail direction.

Next, the operation of the railway track bed replacement machine A will be explained in terms of a track bed partial replacement method.

At night, when train service is suspended, etc., the trackbed changing machine A is transported to the trackbed repair point using an appropriate method. Meanwhile, at the site, one sleeper is removed to prepare a space for inserting the shovels 20, 20.

Next, by rotating the support boom 15 and adjusting its extension/contraction amount, the center of the excavating and scooping device C, that is, the center of the support rod 18, is moved above the rail 13 on one side as shown in FIG. The direction of the support rod 18 is adjusted by hand or the like so that it is approximately perpendicular to the rail. After that, the main cylinder 21 and the shovel rotation cylinder 24 are operated to rotate the shovel cutting edge 2.
0a is adjusted so that it is approximately perpendicular to the track bed surface, and by pressing the tip of the support boom 15 downward, the cutting edge 20a is bitten into the track bed.

In addition, especially in a strongly consolidated area, during the biting operation of the cutting edge, the upper part of the excavating and scooping device C can be tilted forward or backward by expanding and contracting the boom tip 15a. At the same time, a so-called "swinging" effect is applied to the shovel cutting edge 20a by swinging the boom tip 15a left and right, or by simultaneously moving the cutting edge slightly back and forth using both cylinders 21 and 24. By doing this, the shovel tip can be easily inserted into the hardened roadbed, just as a worker shakes the tip of the shovel to smoothly penetrate the sand and gravel.
It is possible to penetrate a.

Furthermore, in conjunction with the biting operation of the shovel cutting edge 20a, the main cylinder 21 and the shovel rotation cylinder 24 are operated to rotate the shovels 20, 20 in the direction of arrow A and scrape them in the direction of arrow B, Excavating and scooping out gravel. After that, rail 1
With both shovel cutting edges 20a, 20a spread apart by a width of 3, the shovel is pulled upward and the scooped gravel is discharged out of the orbit.

When the work on one rail 13 side is completed, the support boom 15 is moved to move the excavating and scooping device C onto the other rail, and the same operation is performed to excavate and scoop out gravel.

Once the sand and gravel in the space has been removed, move the work cart B by the distance between the sleepers, loosen the vault of the next sleeper, move it to the position of the previously removed sleeper, and perform the same operation as above to remove the new sleeper. Remove sand and gravel from the space created in the above. By repeating the above-described operations, the sand and gravel within a predetermined distance are removed, and the first removed sleeper is fixed to the trace of the last moved sleeper.

If the gravel is removed, wooden blocks should be inserted to temporarily support the track, or new gravel should be laid in parallel with the sand and gravel removal work to minimize the suspension of the track. Of course.

Since the present invention has the above-described configuration, it has many excellent effects as described below.

(1) The support rod 18 and both columns 19, 19 are strengthened and their dimensions are made considerably longer than the dimensions of the shovel 20, and each shovel tip 20a penetrates into the track bed by expanding and contracting the support boom tip 15a and moving left and right. Because the shovel swings back and forth and left and right, the shovel tip can easily penetrate even if there is a particularly firmly consolidated track bed during work, much like when working with a manual shovel, greatly increasing work efficiency. It is possible to make significant improvements.

(2) The main cylinder 21 is disposed between the center of the support rod 18 and the lower part of the column 19, and is configured to apply downward force directly to the shovel 20 via the column 19, so that it can be pressed down more strongly. Power can be given to shovel 20, and both shovels 2
0 and 20 can be drawn approximately horizontally and lifted upward. As a result, main cylinder 2
1, the shovel rotation cylinder 24, and the support boom 15, the left and right 2
By repeating this operation, the gravel can be completely removed so that the bottom of the track bed becomes approximately horizontal.

In addition, the boom tip 15 supporting the excavation scooping device C
Since it is configured to be rotatably attached to a,
The support rod 15 of the excavating and scooping device C can be easily oriented in a direction perpendicular to the rail 13, and the reaction forces of both shovels 20, 20 applied to the rail 13 are canceled out. As a result, even when the two shovels 20, 20 are pulled together, no excessive bending stress is applied to the rail, and there is no risk of the rail becoming misaligned.

As mentioned above, the present invention has extremely high practical utility.

[Brief explanation of the drawing]

Figures 1 and 2 are a side view and a schematic diagram of the mechanism of the shovel portion of a hydraulic excavator according to Japanese Patent Publication No. 53-41842. FIG. 3 is a side view of the railway bed changing machine according to the present invention, and FIG. 4 is a plan view thereof. FIG. 5 is a schematic front view of the excavating and scooping device C. FIG. 6 is a perspective view showing the mounting mechanism of the shovel 20. A...Railway bed changing machine, B...Hydraulic work trolley, C
...Excavation scooping device, 14...Caterpillar type truck,
DESCRIPTION OF SYMBOLS 15... Support boom, 15a... Tip part of support boom, 18... Support rod, 19... Strut, 20... Shovel, 20a... Shovel cutting edge, 21... Main cylinder, 24... Shovel rotation cylinder.

Claims (1)

[Claims] 1. At both ends of the support rod 18, which is arranged substantially horizontally in the width direction of the work cart 14, struts 19, 19 are arranged in parallel in a direction substantially perpendicular to the support rod 18, and the upper end of the support rod 18 is placed in parallel with the support rod 18, and Shovels 20, 20 are rotatably supported in the width direction, and are disposed with cutting edges 20a facing each other at the lower ends of the pillars 19, 19. The upper side of the cutting edges 20a of the shovels 20, 20 extends in the width direction of the work cart 14. Main cylinders 21, 21 are rotatably supported between the lower parts of the support rods 19, 19 and the center of the support rod 18, and main cylinders 21, 21 are provided between the lower parts of the support rods 19, 19 and the center of the support rod 18, and the The central part of the support rod 18 of the gate-shaped excavating and scooping device C is formed by disposing shovel rotation cylinders 24, 24 between the cutting edges 20a of the shovels 20, 20 and the upper outer side on the opposite side, respectively. It is attached to the tip of the support boom 15 of the hydraulic work cart 14 so as to be rotatable in the longitudinal direction of the work cart 14, and the tip of the support boom can be extended/contracted and moved laterally, and the shovel tip can swing due to the operation of each cylinder. A railway bed changing machine characterized by easy penetration of the cutting edge.