JP2021098394A - Railway vehicle - Google Patents

Abstract

To provide a method by which a snow accretion around an internal corner part is suppressed in a railway vehicle that has a single sliding door which, along with the vehicle body, makes the internal corner part appear outside a door end part in a totally closed state.SOLUTION: A railway vehicle 2 is a railway vehicle with a single sliding door 6. The single sliding door 6 has a slope part 8 in an outside of a door end part to make a shape of an internal corner part sloped where the internal corner part is formed between the single sliding door and the vehicle body structure (an inside surface 41 of an entrance 4 opening) in a totally closed state of the single sliding door.SELECTED DRAWING: Figure 2

Description

The present invention relates to a railroad vehicle.

Aerodynamic measures, measures using a heat source such as a snow melting heater, and material measures are known as snow accretion measures for railway vehicles traveling in snowy areas.
For example, Patent Document 1 discloses a technique relating to aerodynamic measures for suppressing snow accretion around a trolley by improving the air flow around the trolley.

JP-A-2018-203146

Conventional railway vehicle snow accretion measures are mainly for snow accretion on the lower part of the vehicle body, especially around the bogie. However, it is necessary to take measures against snow accretion around the entrance.

FIG. 8 is a diagram for explaining snow accretion around the entrance / exit of a railway vehicle such as a Shinkansen or a limited express train, and is a view of a state in which the entrance / exit is closed as viewed from the front of the entrance / exit. FIG. 9 is a schematic view of the cross section around the entrance / exit of FIG. 8 from above.

The railroad vehicles shown in FIGS. 8 and 9 have an airtight structure. A single sliding door 6 is adopted for the side sliding doors provided at the entrances 4 on the side surfaces of the vehicle structure (left and right sides of the vehicle), and the single sliding door 6 is pressed against the structure via packing to close the airtightness inside the vehicle. It is kept. In the examples of FIGS. 8 and 9, the single sliding door 6 opens to the right of the drawing. Further, when the entrance 4 is closed, the exterior of the vehicle side and the outer surface of the single sliding door 6 are not necessarily flush with each other, and the door is closed at a place recessed slightly inward from the exterior surface of the vehicle. It has become. Specifically, the opening of the entrance 4 includes an inner side surface 41 whose normal line faces the vehicle longitudinal direction (left-right direction in the drawings in FIGS. 8 and 9) and an edging portion 42 inclined inward from the side surface of the vehicle structure. When the entrance 4 is fully closed, a substantially right-angled corner can be formed between the inner side surface 41 and the single sliding door 6. In addition, in FIGS. 8 and 9, the sizes of the inner side surface 41 and the edging portion 42 are drawn large in order to make it easy to understand the existence of the inner side surface 41, the edging portion 42 and the inside corner.

When a railroad vehicle having such a configuration travels in a snowfall environment in a direction in which the door end side of the single sliding door 6 is located downstream of the traveling wind (to the right in the drawings in FIGS. 8 and 9), snow accretion 9 occurs around the inside corner. (Parts represented by broken lines + shading in FIGS. 8 and 9) occur.

FIG. 10 is a diagram for explaining snow accretion around the entrance / exit as shown in FIGS. 8 and 9, and is a view of a state in which the entrance / exit is in the process of being fully opened as viewed from the front of the entrance / exit. FIG. 11 is a schematic view of the cross section around the entrance / exit of FIG. 8 from above.

When the entrance 4 is opened with the snow accretion 9 as described above, the single sliding door 6 is released from the vehicle structure in order to release the airtightness, and the single sliding door 6 is separated from the vehicle structure. After that, the single sliding door 6 moves to the door pocket side. The snow accretion 9 is peeled off by the vibration generated in these series of operations. Then, a part of the snow accretion 9 that has fallen off may enter the inside of the vehicle through the open entrance 4 and accumulate on the floor on the door end side of the single sliding door 6. If the entrance 4 is closed in this state, the accumulated snow may be sandwiched between the single sliding door 6 and the vehicle structure, resulting in poor closing of the single sliding door 6.

The problem to be solved by the present invention is to make it possible to suppress snow accretion in the vicinity of the inside corner in a railway vehicle having a single sliding door in which an inside corner is generated outside the door tip portion with the vehicle structure in the fully closed state. To provide new technology.

The first invention for solving the above-mentioned problems is a railway vehicle provided with a single sliding door, wherein the single sliding door is on the outside of a door tip portion which is an entrance corner with the vehicle structure in a fully closed state. It is a railroad vehicle having an inclined portion for making the shape of the inside corner inclined.

The second invention is the railway of the first invention, wherein the inclined portion is provided on the outside of the door tip portion which becomes the inside corner between the inclined portion and the inner side surface of the opening related to the single sliding door in the vehicle structure. It is a vehicle.

The third invention is the railroad vehicle of the second invention, wherein the inner surface thereof has a normal direction along the door opening / closing direction of the single sliding door.

When snow accretion occurs near the inside corner downstream of the running wind, the snow particles that were following the running wind collide with the inside corner because the snow particles do not follow the running wind due to the disturbance of the running wind near the inside corner. Due to that.
According to any one of the first to third inventions, the shape of the inside corner can be changed from the state facing the running wind to the inclined shape. Since the inclined portion intersects the traveling wind at an angle, the traveling wind flows more smoothly than before, and a sudden decrease in the flow velocity is suppressed. And snowfall is suppressed by that much.

A fourth aspect of the present invention is the railway vehicle according to any one of the first to third aspects, wherein the inclined portion is provided over the entire height of the inside corner between the inclined portion and the vehicle structure.

According to the fourth invention, the effect of suppressing snow accretion can be exerted over the entire height of the single sliding door.

A fifth invention is a railway vehicle according to any one of the first to fourth inventions, wherein the slope of the inclined portion is linear or concave.

According to the fifth invention, turbulence in the vicinity of the inside corner of the running wind can be suppressed, and snow accretion can be effectively suppressed.

In the sixth invention, in the vehicle structure, the edging portion of the opening related to the single sliding door is tilted inward at a predetermined gradient angle, and the inclination of the inclined portion has a difference of -15 degrees or more from the gradient angle. Moreover, it is a railroad vehicle of any one of the first to fifth inventions which has an inclination angle of +15 degrees or less.

In the seventh invention, the difference between the inclination angle of the inclined portion and the inclination angle is −20 degrees or less or +20 degrees or more, and the edging portion of the opening of the vehicle structure is 20 degrees or less. It is a railroad vehicle of any one of the first to fifth inventions that is tilted inward at a gradient angle.

According to the sixth or seventh invention, it is possible to enhance the effect of suppressing turbulence in the vicinity of the inside corner of the running wind and effectively suppress snow accretion.

The perspective external view of the railroad vehicle of this embodiment. An enlarged view of the area around the entrance / exit of the railway vehicle of the present embodiment as viewed from the outside front. The enlarged view of the cross section around the entrance / exit of the railroad vehicle of this embodiment. A type table of wind tunnel tests to confirm the action and effect of the slope. The graph which shows the result of the wind tunnel test for confirming the action effect of the inclined part. The figure for demonstrating the deformation example of the inclined part (the 1). FIG. 2 is a diagram for explaining a modified example of the inclined portion. It is a figure which shows the snow accretion state around the entrance and exit of a conventional railroad vehicle, and is the enlarged view which looked around the entrance and exit from the outside front. It is a figure which shows the snow accretion state around the entrance / exit of a conventional railroad vehicle, and is the enlarged view of the cross section around the entrance / exit. It is a diagram showing a state in which snowfall around the entrance / exit of a conventional railway vehicle has fallen off and accumulated in the vehicle, and is an enlarged view of the area around the entrance / exit when viewed from the outside front. It is a figure which shows the state which the snowfall around the entrance / exit of a conventional railroad vehicle has fallen off and accumulated in the vehicle, and is the enlarged view of the cross section around the entrance / exit.

Hereinafter, an example of an embodiment to which the present invention is applied will be described, but it goes without saying that the embodiment to which the present invention can be applied is not limited to the following embodiments.

FIG. 1 is a perspective external view of the railway vehicle 2 of the present embodiment. The railroad vehicle 2 has entrances 4 on the left and right sides. A single sliding door 6 is used for the entrance 4.

FIG. 2 is an enlarged view of the area around the entrance / exit when viewed from the outside front. FIG. 3 is an enlarged view of a cross section around the entrance / exit. The entrance 4 (opening related to the single sliding door in the vehicle structure) has an inner side surface 41 and a edging portion 42.

The inner side surface 41 is a surface along the direction of passing inside and outside the vehicle for getting on and off, and has a width L1 in the inside / outside direction. Focusing on the vehicle front-rear direction, the inner surface 41 is a surface whose normal line faces the vehicle longitudinal direction (direction along the traveling direction). It can be said that the normal direction of the inner side surface 41 is a direction along the door opening / closing direction of the single sliding door 6.

The edging portion 42 is a surface provided so as to chamfer the outer edge of the inner side surface 41, and is a surface whose normal direction is inclined toward the entrance 4 side with respect to the vehicle left-right direction. The width of the edging portion 42 in the inside / outside direction is the width L2 in the inside / outside direction. The edging portion 42 is tilted inward with a gradient angle θ1 of, for example, about 22 ° with respect to the vehicle longitudinal direction (vehicle traveling direction).

Focusing on the case of the single sliding door 6 in the fully closed state and the entrance / exit 4, the outer surface and the inner surface 41 of the single sliding door 6 intersect at right angles or substantially at right angles. The single sliding door 6 has an inclined portion 8 for making the shape of the inside corner inclined on the outside of the door tip portion. The inclination direction is a direction that intersects the traveling wind at an angle.

The inclined portion 8 can be realized as a sheet metal processed product of stainless steel or an aluminum alloy, a drawing material such as aluminum, a processed product of a synthetic resin, or the like, and is provided on the outside of the door tip portion of the single sliding door 6.

The inclined portion 8 is provided over the entire height of the entrance / exit 4 which is an entrance corner with the vehicle structure, and when the one-sided sliding door 6 is in a fully closed state, the normal line enters the inclined surface diagonally outward. It is formed so as to face the upstream side of the running wind. The inclined surface formed by the inclined portion 8 is a straight flat end surface when viewed in cross section (see FIG. 3).

More specifically, as described above, in the vehicle structure, the edging portion 42 is tilted inward at a predetermined gradient angle θ1 (angle with respect to the outer surface of the vehicle structure), but the inclination angle θ2 of the inclined portion 8 is the edging portion 42. The difference from the gradient angle θ1 is set to be ± 20 degrees or less.

The inclined portion 8 has a shape protruding from the outer surface of the single sliding door 6, but there is no problem in opening and closing the entrance / exit 4. That is, even if the entrance / exit 4 of the single sliding door 6 is fully opened, the tip end portion on the door end side is not housed and is slightly left at the entrance / exit 4 to be exposed. The dimensions of the inclined portion 8 are set so as to fit within the exposed portion. Therefore, even if there is an inclined portion 8, the entrance / exit 4 can be opened / closed as before, and the opening width of the entrance / exit 4 is not affected by the inclined portion 8.

FIG. 4 is a type table of a wind tunnel test for confirming the action and effect of the inclined portion. FIG. 5 is a graph showing the results of a wind tunnel test for confirming the action and effect of the inclined portion 8 in each type of FIG.
In the wind tunnel test, a 1/1 scale model is installed in the wind tunnel, and while supplying natural dry snow from the windward side, water is sprayed to reproduce wet snow, which is said to easily cause snow on railroad cars. I went there. The wind direction was set so that the door end side of the single sliding door 6 was downstream of the running wind (downstream of the blowing air), and the wind speed was set to a wind speed at which snowfall on the model was permitted within the restrictions of the test equipment. Then, after the test under each condition, snow accretion was collected and the weight was measured. The vertical axis of the graph represents the weight ratio of the snow accretion weight in the conventional shape without the inclined portion 8 as “1.0”.

The tests were conducted on four types having different combinations of the gradient angle θ1 and the gradient angle θ2, and the weight ratio of each type was 80% or less of the conventional shape.
Comparing the four types tested, the types A and B in which the angle difference Δθ with respect to the gradient angle θ1 of the inclination angle θ2 of the inclined portion 8 is -15 degrees or more and +15 degrees or less (= ± 15 degrees or less) are so. The snow accretion suppression effect was higher than that of non-types C and D.
Comparing types C and D with an angle difference Δθ of -20 degrees or less or +20 degrees or more (= ± 20 degrees or more), type C with a structure gradient angle θ1 of 20 degrees or less suppresses snow accretion. The effect was high.

From the test results, by providing the inclined portion 8, the space of the inside corner is reduced so as to fill the recessed portion having a substantially right angle, which is the inside corner in the outer shape, and the running wind can flow smoothly. It can be said that the inclined portion 8 effectively suppresses the stagnation at the inside corner as in the conventional case and suppresses the snowfall. Even if the variation in the test conditions is taken into consideration, it can be said that the effect of the present embodiment is recognized that the effect of suppressing snow accretion by weight ratio of 20% or more can be expected by providing the inclined portion 8.

Although an example of the embodiment to which the present invention is applied has been described, the embodiment to which the present invention is applicable is not limited to the above-described embodiment itself.
For example, in FIG. 1, the railway vehicle 2 is depicted as the leading vehicle (it may be the last vehicle depending on the traveling direction), but the present embodiment can also be applied to an intermediate vehicle.

Further, in the above embodiment, it has been described that the inclined portion 8 is provided as a separate part from the single sliding door 6 and can be retrofitted to the single sliding door 6, but the inclined portion 8 is integrally molded when the single sliding door 6 is created. You may do so.

Further, as shown in FIG. 6, the inclined surface formed by the inclined portion 8 may be a curved surface having a concave curve in the inside corner direction when viewed in a cross section along the longitudinal direction of the vehicle. Further, the gap between the inclined portion 8 and the inner side surface 41 is filled between the inclined portion 8 and the inner side surface 41 in a fully closed state for the purpose of reducing air resistance and noise and further improving the snow accretion effect. The elastic member 10 may be added as appropriate. The elastic member 10 is not limited to the form of filling the inside of the gap, and may be in the form of a fin that covers (hides) the outer surface of the gap.

Further, in the above embodiment, the width of the inclined portion 8 (the width in the opening / closing direction of the single sliding door 6, the width in the longitudinal direction of the vehicle; see FIG. 3) is illustrated as being constant, but the present invention is not limited to this. For example, as shown in FIG. 7, the width (length in the longitudinal direction of the vehicle) of the inclined portion 8 near the upper part and the lower part of the single sliding door 6 is gradually increased toward the upper end and toward the lower end. Good. In other words, the inclined portion 8 may have an inclined inner corner not only for the inner corner on the door end side of the single sliding door 6, but also for a part of the upper and lower inner corners of the single sliding door 6.

Further, the railroad vehicle 2 may have a form in which the entire single sliding door 6 including the inclined portion 8 is housed in the door pocket portion when the railroad vehicle 2 is fully opened. In that case, if the single sliding door 6 is pulled inward to release the airtightness when the single sliding door 6 is opened, the convex dimension of the inclined portion 8 from the single sliding door 6 is larger than the distance at which the single sliding door 6 is separated from the inner surface of the vehicle structure. Should be set to be small.

2 ... Railroad vehicle 4 ... Entrance / exit 41 ... Inner surface 42 ... Border 6 ... Single sliding door 8 ... Slope 9 ... Snow accretion 10 ... Elastic member

Claims (7)

A railroad car with a single sliding door
The single sliding door has an inclined portion for inclining the shape of the inside corner on the outside of the door tip portion which is an inside corner with the vehicle structure in the fully closed state.
Railroad vehicle. The inclined portion is provided on the outside of the door tip portion, which is the entrance corner between the inclined portion and the inner side surface of the opening related to the single sliding door in the vehicle structure.
The railway vehicle according to claim 1. The normal direction of the inner surface is a direction along the door opening / closing direction of the single sliding door.
The railway vehicle according to claim 2. The inclined portion is provided over the entire height of the inside corner between the inclined portion and the vehicle structure.
The railway vehicle according to any one of claims 1 to 3. The inclination of the inclined portion is linear or concave.
The railway vehicle according to any one of claims 1 to 4. In the vehicle structure, the edging portion of the opening related to the single sliding door is tilted inward at a predetermined gradient angle.
The inclination of the inclined portion is an inclination angle having a difference from the inclination angle of −15 degrees or more and +15 degrees or less.
The railway vehicle according to any one of claims 1 to 5. The difference between the inclination angle of the inclined portion and the inclination angle is −20 degrees or less or +20 degrees or more.
In the vehicle structure, the edging portion of the opening related to the single sliding door is tilted inward at a gradient angle of 20 degrees or less.
The railway vehicle according to any one of claims 1 to 5.

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