JP3630856B2 - Railway work vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a railway work vehicle that runs on a railway track and performs maintenance and inspection work. More specifically, the present invention relates to a railway work vehicle that can perform work in a stable posture without being affected by deflection of a shaft spring. It relates to work vehicles.
[0002]
[Prior art]
Structures such as overhead lines, tunnels, and bridges installed along railroad tracks are regularly maintained and inspected, and the safety of rail transport is maintained.
For this reason, railroad industrial vehicles that can travel on railroads and are equipped with working devices such as a lifting platform on which workers are placed and cranes that lift heavy objects are widely used.
[0003]
By the way, in the portion where the track is curved, in order to cancel out the centrifugal force acting on the vehicle body of the railway vehicle traveling on the curve portion, a so-called cant is provided in which the track inside the curve is set lower than the track outside the curve. .
Therefore, when a conventional work vehicle stops at such a cant and performs maintenance and inspection, the work vehicle itself tilts by the amount of the cant, and thus a stable work posture cannot be taken.
[0004]
Therefore, the applicant of the present invention has invented a railway work vehicle that can perform maintenance and inspection work in a stable posture even at the cant portion (Japanese Patent Publication No. 60-42160). The structure of this railway work vehicle will be outlined with reference to FIG. 5. One end of a work device mounting base 4 on which a lifting platform 3 on which a worker is placed is mounted on a vehicle body 2 of the work vehicle 1. The shaft 5 is pivotally supported so as to be tiltable with respect to the vehicle body 2.
Further, a hydraulic cylinder 6 is interposed between the other end of the work device mounting base 4 and the vehicle body 2 so that the inclination angle of the work device mounting base 4 with respect to the vehicle body 2 can be adjusted.
[0005]
When the work vehicle 1 having such a structure is stopped at a cant portion and maintenance inspection work is performed, first, the hydraulic cylinder 6 is expanded and contracted to adjust the inclination of the work device mounting base 4 with respect to the vehicle body 2 to mount the work device. The pedestal 4 is kept horizontal.
As a result, the elevator 3 can rotate around the rotation axis C extending in the vertical direction, so that the car 7 does not move up and down with the rotation of the elevator 3, and the worker can perform maintenance and inspection work in a stable posture. It can be performed.
[0006]
[Problems to be solved by the invention]
By the way, the vehicle body 2 of the work vehicle 1 according to the above-mentioned prior application is mounted on the axle 9 via the shaft spring 8.
As a result, the elevator 3 rotates about the axis C, and when the car 7 is positioned on the side of the vehicle body 2 as shown in FIG. 5, the shaft spring 8 is moved by the weight of the worker or the like riding on the car 7. The vehicle body 2 will bend and bend.
That is, in the conventional railway work vehicle 1, a situation occurs where the work device mounting table 4 is inclined by the amount of deflection of the shaft spring 8.
[0007]
Therefore, the object of the present invention is to solve the problems of the above-mentioned conventional technology, and the deflection of the shaft spring does not affect the posture of the working device mounted on the vehicle body, and the posture is stable even at the cant portion of the track. An object of the present invention is to provide a railway work vehicle capable of performing maintenance and inspection work.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, a railway work vehicle according to the present invention is a railway work vehicle that travels on a railroad track and performs maintenance inspection work, and is equipped with a work apparatus for maintenance inspection work. A work device mounting base mounted so as to be tiltable relative to the vehicle, a mounting base tilting means for tilting the work device mounting base with respect to the vehicle body, and the work device mounting for grounding and supporting the work device mounting base. An outrigger attached to a base; and an axle lifting / lowering means interposed between the vehicle body and the axle and capable of raising and lowering the axle when the outrigger is grounded.
Preferably, the axle raising / lowering means raises the axle within a range in which engagement between a flange portion of a wheel attached to the axle and the track is not disengaged.
[0009]
That is, when the maintenance inspection work is performed on the canal portion of the track using the railway work vehicle of the present invention, the vehicle body is tilted by the cant. Therefore, the mounting table tilting means is operated to tilt the work device mounting table with respect to the vehicle body and keep it horizontal. Next, the outrigger is grounded to support the work device mounting base. After that, when the axle raising / lowering means is operated to raise the axle, a part of the weight of the vehicle body loaded on the axle is loaded on the outrigger via the work device mounting base.
As a result, the outrigger is firmly fixed to the ground, so that the work equipment mounting base is not affected by the deflection of the shaft spring, and the maintenance work can be performed by operating the work equipment in a stable posture. it can.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a railway work vehicle according to the present invention will be described in detail with reference to FIGS. 1 to 4.
1 is an overall side view of an embodiment of a railway work vehicle according to the present invention, FIG. 2 is an overall plan view of the work vehicle shown in FIG. 1, and FIG. 3 is a rear front view of the work vehicle shown in FIG. FIG. 4 and FIG. 4 are rear front views showing an enlarged main part of FIG.
[0011]
As shown in FIGS. 1 to 3, the vehicle body 10 of the railway work vehicle 100 of the present embodiment travels on the track R by driving the front and rear wheels 11 and 12 to rotate by a diesel engine (not shown).
A work device mounting base 20 is pivotally supported on the loading platform 13 of the vehicle main body 10 by a support shaft 14 extending horizontally in the front-rear direction of the vehicle main body 10 so as to be tiltable in the width direction of the vehicle main body 10. .
An axle box 16 that rotatably supports both ends of the rear axle 15 of the vehicle body 10 is attached to the lower surface of the loading platform 13 via an axle spring 17.
[0012]
On the other hand, a crane 30 as a working device is rotatably mounted on the working device mounting table 20 around a rotation axis C extending perpendicularly to the upper surface of the working device mounting table 20.
Furthermore, an outrigger 40 that can contact the ground G and support the work device mounting table 20 is attached to the work device mounting table 20.
The outrigger 40 can be expanded and contracted in the width direction of the vehicle body 10, and can be extended to the position indicated by the imaginary line in FIG. It has hydraulic cylinders 45, 46, 47, 48 that are attached to the tip and can be expanded and contracted in the vertical direction. And the grounding member S is attached to the lower end of piston P of these hydraulic cylinders, respectively.
[0013]
Further, hydraulic cylinders 51 and 52 serving as mounting table tilting means 50 for tilting the working device mounting table 20 with respect to the loading table 13 are interposed between the working device mounting table 20 and the loading platform 13 of the vehicle body 10. ing.
As a result, when the hydraulic cylinders 51 and 52 are expanded and contracted, the working device mounting base 20 tilts around the axis of the support shaft 14 and can be kept horizontal regardless of the inclination of the loading platform 13.
[0014]
In addition, hydraulic cylinders 61 and 62 as axle lifting means 60 are interposed between a pair of axle boxes 16 that rotatably support both ends of the rear axle 15 and the loading platform 13, respectively.
Accordingly, if the hydraulic cylinders 61 and 62 are shortened, the rear axle 15 can be lifted against the extension force of the shaft spring 17 and can be drawn toward the loading platform 13 side. On the other hand, if the hydraulic cylinders 61 and 62 are extended, the rear axle 15 can be lowered.
[0015]
Next, a description will be given of a procedure for performing maintenance / inspection work at the cant portion of the track R using the railway work vehicle 100 of the present embodiment having the above-described configuration.
After the vehicle body 10 is stopped at the cant portion of the track R, first, the hydraulic cylinders 51 and 52 of the mounting table tilting means 50 are expanded and contracted, and the work device mounting table 20 is tilted around the axis of the support shaft 14 to be horizontal. Keep on.
Thereafter, the four horizontal arms 41, 42, 43, 44 of the outrigger 40 are respectively extended as indicated by phantom lines in FIG. 2 and hydraulic cylinders 45, 46, 47, 48 attached to the tips thereof. The piston P is projected, and the grounding member S is grounded to the ground G. At this time, the pistons P of the hydraulic cylinders 45, 46, 47, and 48 are protruded so as not to lift the work device mounting base 20, so that the wheels 12 do not float from the track R.
Next, the hydraulic cylinders 61 and 62 of the axle lifting / lowering means 60 are shortened to raise the axle 15 against the extension force of the shaft spring 17. The amount by which the axle 15 is raised is suppressed to about 15 mm so that the flange portion of the wheel 12 and the track R are not disengaged.
[0016]
When the wheel 12 is lifted from the track R, the loading platform 13 of the vehicle main body 10 is suspended from the work device mounting platform 20 via the support shaft 14.
Thus, a part of the weight of the railway work vehicle 100 supported by the axle 15 and the wheels 12 is supported by the outrigger 40 via the work device mounting base 20.
Then, a part of the weight of the railway work vehicle 100 is loaded on the outrigger 40, so that the outrigger 40 is firmly fixed to the ground G.
Therefore, even when the crane 30 lifts a heavy object, the work device mounting base 20 does not tilt due to the deflection of the shaft spring 17, and the crane 30 can always perform maintenance and inspection work in a stable posture.
[0017]
On the other hand, when the maintenance and inspection work is completed, the hydraulic cylinders 61 and 62 of the axle lifting / lowering means 60 are extended to lower the axle 15 and the pair of left and right wheels 12 are placed on the track R.
As a result, the outrigger 40 is no longer loaded with a part of the weight of the railway work vehicle 100, so that the hydraulic cylinders 45, 46, 47, and 48 are shortened to separate the grounding member S from the ground G and The arms 41, 42, 43, 44 may be shortened and stored in the work device mounting base 20.
[0018]
That is, in the railway work vehicle 100 of the present embodiment, the work device mounting base 20 on which the crane 30 as the work device is mounted is attached to the loading base 13 of the vehicle main body 10 so as to be tiltable by the support shaft 14. . A mounting table tilting means 50 is interposed between the work device mounting table 20 and the loading platform 13.
As a result, the work device mounting base 20 can be kept horizontal even when the maintenance inspection work is performed at the portion where the track R is canted.
In addition, the outrigger 40 attached to the work device mounting base 20 is grounded to the ground G, and the axle lifting / lowering means 60 is operated to raise the axle 15, whereby a part of the weight of the railway work vehicle 100 is set on the outrigger 40. Can be loaded. As a result, the outrigger 40 is firmly fixed to the ground G and is not affected by the shaft spring 17 at all. Therefore, even if the crane 30 lifts a heavy object, the work device mounting base 20 does not tilt at all. Can perform maintenance and inspection work on the track R in a stable posture.
Furthermore, in the railway work vehicle 100 of the present embodiment, the axle 15 is moved up and down using the hydraulic cylinders 61 and 62 of the axle lifting means 60 after the work device mounting base 20 is fixed by the outrigger 40, so that the axle 15 is It can be easily and accurately raised, and the engagement between the flange portion of the wheel 12 and the rail R can be maintained.
As a result, as in the case where the hydraulic cylinders 45, 46, 47, 48 of the outrigger 40 are extended to raise the axle 15, the work device mounting base 20 cannot be kept horizontal, or the wheels 12 come off the rail R. Without having to do so, the work can be performed very efficiently.
[0019]
The embodiment of the railway work vehicle according to the present invention has been described in detail above. However, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications are possible.
For example, in the above-described embodiment, the hydraulic cylinders 61 and 62 as the axle lifting means are interposed between the loading platform 13 and the axle box 16 of the vehicle body 10, but the axle 15 is attached to the carriage frame. In such a case, the hydraulic cylinders 61 and 62 may be interposed between the carriage frame and the axle box 16.
Further, in the above-described embodiment, the case where the maintenance inspection work is performed at the portion where the track is curved, that is, the portion where the track R is canned is described as an example, but the portion where the track R extends in a straight line. Needless to say, the same effect can be obtained in the maintenance and inspection work.
[0020]
【The invention's effect】
As is clear from the above description, in the railway work vehicle of the present invention, the work device mounting base on which the work device is mounted is attached to be tiltable with respect to the vehicle body. A mounting table tilting means is interposed between the work device mounting table and the vehicle body.
As a result, even when the vehicle body is tilted when the maintenance inspection work is performed at the portion where the track is canted, the work device mounting base can be kept horizontal.
Also, after the outrigger attached to the work equipment mounting base is grounded to the ground, the axle lifting means is operated to raise the axle from the track, so that a part of the weight of the railway work vehicle can be loaded on the outrigger. it can.
As a result, the outrigger is firmly fixed to the ground G, and the working device mounting base can be kept horizontal without any influence of the shaft spring interposed between the vehicle body and the axle. Can perform maintenance and inspection work on the track in a stable posture.
Therefore, according to the present invention, the rail work vehicle can perform maintenance and inspection work in a stable posture even at the cant portion of the track without the deflection of the shaft spring affecting the posture of the working device mounted on the vehicle body. Can be provided.
[Brief description of the drawings]
FIG. 1 is an overall side view of an embodiment of a railway work vehicle according to the present invention.
2 is an overall plan view of the work vehicle shown in FIG. 1. FIG.
3 is a rear front view of the work vehicle shown in FIG. 1. FIG.
FIG. 4 is a rear front view showing an enlarged main part of FIG. 3;
FIG. 5 is a structural work vehicle according to a prior application (Japanese Patent Publication No. 60-42160).
[Explanation of symbols]
C Rotating axis G Ground P Piston R Rail S Grounding member 1 Railway work vehicle 2 according to the prior application Car body 3 Lifting platform 4 Working device mounting base 5 Support shaft 6 Hydraulic cylinder 7 Car 8 Axle spring 9 Axle 10 Vehicle body 11, 12 Wheel 13 Loading platform 14 Support shaft 15 Rear axle 16 Axle box 17 Axle spring 20 Work device mounting table 30 Crane 40 Outriggers 41, 42, 43, 44 Support arms 45, 46, 47, 48 Hydraulic cylinder 50 Mounting table tilting means 51, 52 Hydraulic Cylinder 60 Axle Lifting Means 61, 62 Hydraulic Cylinder 100 Railway Work Vehicle of an Embodiment According to the Present Invention

Claims (3)

A railway work vehicle that performs maintenance and inspection work by traveling on a railroad track, and is equipped with a work device mounting base that is mounted so as to be tiltable with respect to the vehicle body, and is equipped with a work device for maintenance and inspection work. A mounting table tilting means for tilting the apparatus mounting base with respect to the vehicle body, an outrigger attached to the work device mounting base that supports the work device mounting base by grounding, and an intermediate between the vehicle body and the axle. A railway work vehicle comprising: an axle lifting means that is mounted and capable of lifting and lowering the axle when the outrigger is grounded. 2. The railway work according to claim 1, wherein the axle elevating means raises the axle from the track within a range in which engagement between a flange portion of a wheel attached to the axle and the track is not disengaged. vehicle. The railway work vehicle according to claim 1 or 2, wherein the axle lifting / lowering means is interposed between a carriage frame attached to the vehicle body and the axle.

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