[Technical Field]
[0001] Technical field of preventing derailment of a railway vehicle on a curved railway
track at high speed and derailment due to an earthquake.
[Background Art]
[0002] As a method for preventing derailment of the railway vehicle, special guard rails
are currently used to prevent the railway vehicle from largely deviating from the
rails after derailment. However, it seems that no method for preventing derailment
of the vehicle itself has been developed.
[Summary of Invention]
[Problem to be Solved by the Invention]
[0003] A mechanism capable of preventing derailment is added to the structure of the vehicle
to prevent derailment from a curved railway track and derailment due to an earthquake.
[Means for Solving the Problem]
[0004] Escape prevention device main bodies 8 are each installed on left and right sides
of a lower part of a bogie main body 5 of a vehicle, and in wide grooves 9 provided
in the main bodies 8, escape preventing thick plates 10 are housed so as to be vertically
slidable. When the vehicle runs on a railway track curved to the right, a centrifugal
force causes a flange part 7 of a left wheel to ride on a left rail 1, the left escape
prevention device main body 8 moves obliquely upward toward the rail, a front surface
11 of the escape preventing thick plate 10 collides with a side surface 3 of a rail
head 2, an L-shaped hook part 13 of the escape preventing thick plate 10 collides
with a lower surface of an eave 4 of the rail head 2, and the escape prevention device
main body further floats, thereby cutting a positioning pin 14 between the escape
prevention device main body and the escape preventing thick plate. The escape prevention
device main body is guided by the escape preventing thick plate, sprung up almost
vertically by 10 cm or more, and then, dropped, and the wheel 6 is returned onto the
rail, and the derailment is prevented.
[0005] When the bogie main body 5 jumps up due to an earthquake, the L-shaped hook parts
13 of the left and right escape preventing thick plates collide with the eaves 4 of
the left and right rail heads 2, which cuts the left and right positioning pins 14.
The left and right escape prevention device main bodies 8 are further guided by the
escape preventing thick plates 10 fitted to the wide grooves 9 of the escape prevention
device main bodies 8, sprung up almost vertically by 10 cm or more, and then, dropped
to original positions, and the derailment is prevented.
[Advantageous Effects of Invention]
[0006] Safety during traveling is maintained by adding the mechanism capable of preventing
the derailment of the vehicle. Further, the cost due to railway track repair can be
reduced.
[Brief Description of Drawings]
[0007]
FIG. 1 is a longitudinal sectional view when escape prevention device main bodies
are attached to a bogie main body of a vehicle, as an example of implementation of
the present invention.
FIG. 2 is a sectional view taken along line A-A of FIG. 1.
FIG. 3 is a longitudinal sectional view when a flange part of a wheel of the vehicle
rides on a left rail and the escape prevention device main body floats, as an example
of implementation of the present invention.
FIG. 4 is a sectional view taken along line B-B of FIG. 3.
FIG. 5 is a longitudinal sectional view when the escape prevention device main body
greatly springs up, as an example of implementation of the present invention.
FIG. 6 is a sectional view taken along line C-C of FIG. 5.
[Mode for carrying out the Invention]
[0008] In a structure for preventing derailment of a railway vehicle, escape prevention
device main bodies 8 are each installed on left and right sides of a lower part of
a bogie main body 5 of the vehicle, and the escape prevention device main bodies have
wide grooves 9 in which escape preventing thick plates 10 are housed so as to be vertically
slidable, and when wheels 6 are on rails 1 in a normal state, front surfaces 11 of
the escape preventing thick plates 10 and side surfaces 3 of rail heads 2 are spaced
apart approximately 15 mm. The escape preventing thick plates have lower ends provided
with L-shaped hook parts 13, and the hook parts have upper sides arranged under eaves
4 of the rail heads 2 with a distance of approximately 15 mm. At this time, positioning
pins 14 are driven into the escape preventing thick plates 10 from the escape prevention
device main bodies 8.
[0009] When the vehicle runs on a railway track curved to the right, a centrifugal force
causes a flange part 7 of the left wheel to ride on the left rail 1, the left escape
prevention device main body 8 moves obliquely upward toward the rail, the front surface
11 of the escape preventing thick plate 10 collides with the side surface 3 of the
rail head 2, the L-shaped hook part 13 of the escape preventing thick plate 10 collides
with a lower surface of the eave 4 of the rail head 2, and the escape prevention device
main body further floats, thereby cutting the positioning pin 14 between the escape
prevention device main body and the escape preventing thick plate. The escape prevention
device main body is guided by the escape preventing thick plate, sprung up almost
vertically by 10 cm or more, and then, dropped, and the wheel 6 is returned onto the
rail, and the derailment is prevented.
[0010] Further, when the bogie main body 5 jumps up due to an earthquake, the L-shaped hook
parts 13 of the left and right escape preventing thick plates collide with the eaves
4 of the left and right rail heads 2, which cuts the left and right positioning pins
14. The left and right escape prevention device main bodies 8 are further guided by
the escape preventing thick plates 10 fitted to the wide grooves 9 of the escape prevention
device main bodies 8, sprung up almost vertically by 10 cm or more, and then, dropped
to original positions, and the derailment is prevented. The structure for preventing
derailment by the escape prevention device attached to the railway vehicle as described
above.
[Description of Reference Sings]
[0011]
- 1
- Rail
- 2
- Rail head
- 3
- Side surface of rail head
- 4
- Eave of rail head
- 5
- Bogie main body
- 6
- Wheel
- 7
- Flange part of wheel
- 8
- Escape prevention device main body
- 9
- Wide groove of escape prevention device main body
- 10
- Escape preventing thick plate
- 11
- Front surface of escape preventing thick plate
- 12
- Protrusion of escape preventing thick plate
- 13
- L-shaped hook part of escape preventing thick plate
- 14
- Positioning pin
1. A structure for preventing derailment of a railway vehicle, characterized in that escape prevention device main bodies (8) are each installed on left and right sides
of a lower part of a bogie main body (5) of the vehicle; the escape prevention device
main bodies (8) have wide grooves (9) in which escape preventing thick plates (10)
are housed so as to be vertically slidable; when wheels (6) are on rails (1) in a
normal state, front surfaces (11) of the escape preventing thick plates (10) and side
surfaces (3) of rail heads (2) are spaced apart approximately 15 mm; the escape preventing
thick plates (10) have lower ends provided with L-shaped hook parts (13); the hook
parts (13) have upper sides arranged under eaves (4) of the rail heads (2) with a
distance of approximately 15 mm; at this time, positioning pins (14) are driven into
the escape preventing thick plates (10) from the escape prevention device main bodies
(8); when the vehicle runs on a railway track curved to the right, a centrifugal force
causes a flange part (7) of the left wheel (6) to ride on the left rail (1), the left
escape prevention device main body (8) moves obliquely upward toward the rail (1),
the front surface (11) of the escape preventing thick plate (10) collides with the
side surface (3) of the rail head (2), the L-shaped hook part (13) of the escape preventing
thick plate (10) collides with a lower surface of the eave (4) of the rail head (2),
the escape prevention device main body (8) further floats, thereby cutting the positioning
pin (14) between the escape prevention device main body (8) and the escape preventing
thick plate (10), the escape prevention device main body (8) is guided by the escape
preventing thick plate (10), sprung up almost vertically by 10 cm or more, and then,
dropped, the wheel (6) is returned onto the rail (1), and the derailment is prevented;
and when the bogie main body (5) jumps up due to an earthquake, the L-shaped hook
parts (13) of the left and right escape preventing thick plates (10) collide with
the eaves (4) of the left and right rail heads (2), which cuts the left and right
positioning pins (14), the left and right escape prevention device main bodies (8)
are further guided by the escape preventing thick plates (10) fitted to the wide grooves
(9) of the escape prevention device main bodies (8), sprung up almost vertically by
10 cm or more, and then, dropped to original positions, and the derailment is prevented,
the structure for preventing derailment by escape prevention devices attached to the
railway vehicle as described above.