JPS6320962B2 - - 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.

Generally, the surface directly below the railroad ties becomes solidified and loses its elasticity due to mud blowing caused by vibration of the rails and other causes. 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 early track deviation. Therefore, if consolidation occurs on a railway track bed, it is necessary to replace the track bed as soon as possible.

The applicant had previously developed a hydraulic excavator that made it possible to mechanically replace roadbeds, which had previously been done by hand, and published this as Japanese Patent Publication No. 41842/1983.

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
It is constructed by disposing shovels 11, 11 on both sides of the cylinder via sub-pillars 8 and cylinders 9 and 10 so as to be openable and closable.

In order to partially replace 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 the sleepers are removed. Loosen the vault of one of the fasteners, shift it to the position of the adjacent sleeper, and use shovel 1 to remove the gravel on one side of the created space.
1 and 11, the rail 12 is scooped up from both sides, and in the same way, gravel on the other rail 12 side is also scooped out and removed. Thereafter, the previously deviated sleeper is returned to its original position and tightened and fixed to the rail, and the other adjacent sleeper is loosened and deviated to a position close to the tightened and fixed sleeper, Remove gravel in the new space in the same manner as above. By repeating the above-described operations, the track bed in the required section is sequentially replaced.

However, the hydraulic excavator has many practical drawbacks as described below.

□1 In order to make the cutting edge of the hardened roadbed shovel 11 bite into the ground, the shovel must be pulled up considerably, accelerated, and the cutting edge thrust perpendicularly and impactfully into the roadbed surface. Overhead lines are strung above the track bed, and there is an extremely high risk of accidental contact with the overhead lines.

□2 Support arms 2, 3, 4 of shovels 11, 11
is fixed to the front part of the mobile vehicle 1 and protrudes largely forward, so that the reaction force when operating the shovel is concentrated on the front wheels of the mobile vehicle 1. the result,
A concentrated load will be applied to the rail, and there is a risk that the rail will become distorted.

□3 There is a difference in the degree of consolidation of the trackbed between the inside and outside of the rail, and generally the outside of the rail is more firmly consolidated. Therefore, in order to scoop out gravel to a uniform thickness, it is necessary to apply a large biting force to the shovel located outside the rail. However, both shovels 1
Since the structure is such that the same biting force is applied to the pieces 1 and 11, it is difficult to remove the gravel with an even thickness.

□4 Since the tips of the arms 2, 3, and 4 are swung left and right using a point on the central axis of the moving vehicle 1 as a fulcrum, as shown in FIG.
The central axes of the shovels 11, 11 that sandwich the rail 12 do not intersect perpendicularly, and the angle θ becomes particularly large at curved points. As a result, when the shovel is operated, a diagonal pinching stress is applied to the rail, which has the drawback of easily causing the rail to become distorted.

The object of the present invention is to eliminate the above-mentioned drawbacks of the invention disclosed in Japanese Patent Publication No. 53-41842, and it has excellent performance of digging into the track bed, is safe, and has no danger of causing rail deformation. The purpose of the present invention is to provide a railway trackbed changing machine that does not require the above-mentioned technology and that also enables a significant improvement in work efficiency.

Hereinafter, details will be explained based on an embodiment of the present invention shown in FIGS. 4 to 9. It should be noted that the present invention is not limited to the configurations of the embodiments, but may be modified as appropriate without departing from the scope of the invention.

FIG. 4 is a side view of the bed changing machine according to the present invention, and FIG. 5 is a plan view thereof. The railway bed changing machine A is a parallel link that is disposed facing the traveling direction on a motor-driven bogie 14 that runs on a rail 13, and whose rear end is rotatably supported in the vertical and horizontal directions. A mold support boom B, a slide support device C that is disposed below the center of the support boom B so as to be movable in the left-right direction and that drives the support boom B in the vertical direction, and a slide support device C that moves the slide support device C in the left-right direction. It is composed of a cylinder device D and an excavating and scooping device E suspended from the tip of the support boom B. The support boom B, slide support device C, The cylinder device D and the excavating and scooping device E are operated.

The support boom B includes two booms 16a, 16b arranged in parallel and each boom 16a, 16b.
It consists of a support rod 16c horizontally suspended at the tip of the support rod 16c so as to be rotatable and pivotable in the front-rear direction, and the rear end of the support rod 16c is placed at a constant height H from the floor surface 14a of the truck.
7, it is supported and fixed so as to be rotatable vertically and horizontally. Moreover, each boom 16a, 16b is
Their center portions are supported by slide support devices C, and the slide support devices C drive the tip portions of the support booms B in the vertical direction.
Note that the ends of each boom 16a, 16b are configured to be extendable and retractable via a hydraulic cylinder (not shown).

As shown in FIGS. 4 to 6, the slide support device C is located approximately below the center of the booms 16a and 16b, that is, approximately at the center of the truck 14, and is fixedly mounted on the truck 14. guide rail 18
A support pedestal 19 is mounted so as to be movable inward, and support shafts 20, 2 are provided between the support pedestal 19 and the booms 16a, 16b.
It is composed of a hydraulic cylinder 21 which is inserted through a hydraulic cylinder 21. In FIG. 6, reference numeral 22 denotes a rolling element attached to the support frame 19, which serves to absorb the load applied to the support frame 19 in the vertical direction.

Each of the slide support devices C is shown in FIGS. 5 and 6.
As shown in the figure, it is moved in the left-right direction by a hydraulic cylinder D, thereby positioning the tip of the support boom B in the left-right direction.

As shown in FIG. 7, the excavating and scooping device E includes struts 23, 23 arranged in parallel at a constant interval L at both ends of a support rod 16c suspended horizontally at the tip of the support boom B.
The upper end of the shovel is rotatably supported in the left-right direction, and the inner upper portions of the shovels 24, 24, which are arranged opposite to each other, are rotatably supported in the left-right direction at the lower end thereof.
Main cylinders 25, 2 for pulling the shovel are located at the lower part of each support column 23, 23 and at the center of the support rod 16c.
5, and links 26, 26, 2 between each support column 23, 23 and the upper part and the outer upper part of the shovel 24.
The shovel rotating sub-cylinders 27, 27 are mounted via support shafts 28, 29 via 6', 26', respectively.

Next, the operation of the railway bed replacement machine A and the method for partial replacement of the track bed will be explained.

At night, when train service is suspended, the track bed replacement machine A is pulled out from the side track onto the main track and runs to the track bed repair point.

Meanwhile, at the site, as shown in Figures 8 and 9, one sleeper _Q1 was removed and shovels 24 and 2
4. Prepare the insertion space F.

Next, by adjusting the amount of expansion and contraction of the support boom B and operating the cylinder device D, the center of the excavating and scooping device E, that is, the center of the support rod 16c, is moved above the rail 13a on one side. It goes without saying that when the cylinder device D is operated, the center of the excavating and scooping device E is automatically positioned directly above the rail 13a.

Next, the main cylinder 25 and the sub-cylinder 27 are operated so that the cutting edge 24a of the shovel is in a direction where it can easily enter the track bed surface, and the hydraulic cylinder 21 is operated to move the tip of the support boom B downward. Push down to force the shovel tip 24a into the track bed. In addition, in conjunction with the biting operation of the shovel cutting edge 24a, the main cylinder 25 and the sub cylinder 2
7, and as shown in Figure 7, the shovel 2
4 and 24 are rotated in the direction of arrow A, and both shovels 24 and 24 are scraped together in the direction of arrow B to excavate and scoop out gravel. Thereafter, the shovel is pulled upward with the cutting edges 24a, 24a spread by the width of the track, and the scooped gravel is thrown into a hopper or the like outside the track.

When the work on one rail 13a side is completed, the cylinder device D is activated to move the excavating and scooping device E onto the other rail 13b, and the same operation is performed to excavate and scoop up gravel.

The work is carried out with the support boom B shortened as much as possible, that is, with the excavating and scooping device E positioned directly near the truck 14. In addition, the main cylinder 25, the sub cylinder 27, and the support boom B are operated in conjunction with each other to perform excavation and scooping.
By repeating this operation, make sure that the bottom of the track bed is almost horizontal.
Sand and gravel can be removed. In addition, the shovel tip 2
Since the rails 4a and 24a are held diagonally upward and lifted, even if the rail width is widened, the scooped up sand and gravel will hardly spill out.

When the removal of sand and gravel in the space F is completed, the cart 14 is moved by the sleeper spacing S, loosens the vault under the next sleeper _Q2 , moves it to the position of the sleeper _Q1 that was previously removed, and then It is fixed to the rail 13 at the position. After that, the sand and gravel in the newly formed space is removed by the same operation as described above. By repeating the above-described operations, the sand and gravel within a predetermined distance are removed, and the first removed sleeper _Q1 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 vertical reaction force of the excavating and lifting device E is transferred to the trolley 1.
4, the reaction force is almost evenly distributed to each wheel 30, 30, and there is no adverse effect on the track. There is no possibility of any deviation. In addition, since the shovels 24, 24, which are arranged opposite to each other, are configured to excavate and scoop up sand and gravel by attracting each other, the reaction force during excavation and scooping is canceled out, and the trolley 1
4 has almost no force applied in a direction perpendicular to the rail, and there is no risk of the rail running incorrectly.

(2) Even when the excavating and lifting device E is moved onto the left and right rails, since the support boom B is of the parallel link type, the axle of the truck 14 and the support boom B
The support rods 16c are always parallel. In other words, the center line C of both shovels 24, 24 and the rail are always linked at right angles, and the stress from the cylinders 25 and 27 acts perpendicularly to the rail, so there is a danger of causing "misalignment", which is the life of the rail. Not at all.

(3) Each boom 1 is supported by two slide support devices C.
Since the shovels 6a and 16b are supported and pressed down, the biting force (pushing down force) applied to the shovels 24 and 24 can be adjusted as desired.
As a result, even if the degree of consolidation on both sides of the rail is different, both shovels 24, 24 can penetrate into the trackbed almost equally, and sand and gravel can be completely removed.

(4) The support boom B is arranged in a nearly horizontal state, and the slide support device C applies a vertical penetration force to the shovels 24, 24, so even during work, it Unlike a hydraulic excavator, there is no need to lift the tip upwards.
Therefore, accidents involving contact with overhead wires, etc. can be completely eliminated. Further, since the horizontal force applied to the bogie 14 is almost negligible, no special braking device is required, and no unreasonable horizontal force is applied to the track.

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

[Brief explanation of the drawing]

FIG. 1 is a side view of a hydraulic excavator for roadbed replacement according to the prior application, and FIG. 2 is a schematic diagram of the mechanism of the shovel portion thereof. FIG. 3 is an explanatory diagram showing the positional relationship between a shovel and a rail in a conventional hydraulic excavator.
FIG. 4 is a side view of the bed changing machine according to the present invention, and FIG. 5 is a plan view thereof. FIG. 6 is a cross-sectional view taken from the side in FIG. 5, and FIG. 7 is a front view of the excavating and scooping device E. FIG. 8 and FIG. 9 are explanatory diagrams of the work procedure using the trackbed changing machine according to the present invention. A... Railway bed changing machine, B... Parallel link type support boom, C... Slide support device, D... Cylinder device, E... Excavation and scooping device, 13... Rail, 14...
Dolly, 15... Hydraulic unit, 16a, 16b... Boom, 16c... Support rod, 23... Strut, 24... Shovel, 25... Main cylinder for pulling the shovel, 2
7... Sub-cylinder for shovel rotation.

Claims (1)

[Claims] 1. Two booms 16a, 16b that are extendable and retractable in the longitudinal direction are arranged in parallel on the truck 14, and the base ends of both booms 16a, 16b are supported on the truck 14 so as to be rotatable in the vertical and horizontal directions. At the same time, a support rod 16c is installed horizontally at the tips of both booms 16a, 16b, and the support rod 16c and both booms 16a, 16b
and a flat link type support boom B in which a support rod 16c is rotatably supported horizontally and in the longitudinal direction of the truck 14; a slide support device C that is disposed so as to be movable in the direction and drives each boom 16a, 16b of the support boom B in the vertical direction; a cylinder device D that drives the slide support device C in the width direction of the truck 14; At the tip of each boom 16a, 16b of the support boom B, there is a horizontal direction and a trolley 1.
Support rod 16c rotatably supported in the longitudinal direction of 4
The upper ends of columns 23, 23, which are arranged substantially perpendicular to the support rod 16c, are rotatably supported in the width direction of the truck 14, and both the columns 2
The upper portions of the cutting edges 24a of shovels 24, 24, which are disposed at the lower ends of 3, 23 with their cutting edges 24a facing each other, are respectively pivotally supported rotatably in the width direction of the truck 14, and the lower portions of the respective pillars 23, 23 are supported. and the support rod 16 are main cylinders 25, 25 for pulling the shovel.
Also, above each pillar 23, 23 and each shovel 2
Sub cylinders 27, 27 for rotating the shovel are provided between the cutting edges 24a of the blades 4 and 24 and the outer upper part on the opposite side, respectively.
An excavating and scooping device E, which is provided with; and a railway bed changing machine.