Interior lighting equipment for railway vehicles and railway vehicles
A standardized interior lighting device for railway vehicles with flexible attachment options addresses the challenge of diverse specifications, ensuring efficient illumination and simplified manufacturing.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KAWASAKI RAILCAR MFG CO LTD
- Filing Date
- 2024-12-27
- Publication Date
- 2026-07-09
Smart Images
Figure 2026115430000001_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to an interior lighting device for a railway vehicle and a railway vehicle.
Background Art
[0002] Patent Document 1 describes a railway vehicle provided with a lighting device module. The cross-sectional shape of the lighting device module is generally a substantially trapezoidal shape with the upper side shorter than the lower side. By arranging the lighting device module on the downstream side of the opening of the conditioned air duct, the conditioned air supplied into the passenger compartment is diverted by the lighting device module and flows along the surface of the ceiling panel.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] If an interior lighting device is designed and manufactured individually for railway vehicles with various specifications, the burden of designing and manufacturing the interior lighting device is large.
[0005] Therefore, an object of the present disclosure is to provide a standardized interior lighting device for railway vehicles with various specifications and a railway vehicle equipped with the interior lighting device.
Means for Solving the Problems
[0006] An interior lighting device for a railway vehicle according to one aspect of the present disclosure is an interior lighting device attached to a mounting surface of a railway vehicle for illuminating a passenger compartment of the railway vehicle, comprising a housing fixed to the mounting surface and extending in the longitudinal direction, and a light source module held in the housing, wherein the housing includes a plurality of outer edges extending in directions different from each other when viewed from the longitudinal direction, and at least two of the plurality of outer edges each have mounting candidate portions to which a fastener for fixing the housing to the mounting surface can be attached.
[0007] A railway vehicle according to one aspect of the present disclosure comprises a car body having the mounting surface, and an interior lighting device comprising a plurality of interior lighting devices mounted on the mounting surface in a manner arranged in the car body. [Effects of the Invention]
[0008] According to this disclosure, it is possible to provide standardized interior lighting devices for railway vehicles of various specifications and railway vehicles equipped with such interior lighting devices. [Brief explanation of the drawing]
[0009] [Figure 1] Figure 1 is a schematic side view of a railway vehicle equipped with an interior lighting device according to the embodiment. [Figure 2] Figure 2 is a cross-sectional view showing the interior lighting device according to the embodiment attached to the mounting surface of a railway vehicle of the first specification. [Figure 3] Figure 3 is a cross-sectional view showing the interior lighting device according to the embodiment attached to the mounting surface of a railway vehicle of the second specification. [Figure 4] Figure 4 is a cross-sectional view showing the interior lighting device according to the embodiment attached to the mounting surface of a railway vehicle of the third specification. [Figure 5] Figure 5 is a cross-sectional view showing the interior lighting device according to the first modified example attached to the mounting surface of a railway vehicle of the first specification. [Figure 6] Figure 6 is a cross-sectional view showing the interior lighting device according to the first modified example attached to the mounting surface of a railway vehicle according to the fourth specification. [Figure 7] Figure 7 is a cross-sectional view showing the interior lighting device according to the first modified example attached to the mounting surface of a railway vehicle of specification 5. [Figure 8] Figure 8 is a cross-sectional view showing the interior lighting device according to the second modified example attached to the mounting surface of a railway vehicle according to the first specification. [Modes for carrying out the invention]
[0010] The embodiments will now be described with reference to the drawings. In the following description, with the interior lighting device 2 according to the embodiment attached to the mounting surface 6b of the railway vehicle 1A of the first specification described later, the direction in which the interior lighting device 2 extends will be defined as the longitudinal direction, the lateral direction perpendicular to the longitudinal direction will be defined as the width direction, and the vertical direction perpendicular to the longitudinal direction and the width direction will be defined as the thickness direction. In addition, the direction in which the body 10 of the railway vehicle 1 extends will be defined as the vehicle longitudinal direction, and the lateral direction perpendicular to the vehicle longitudinal direction will be defined as the vehicle width direction.
[0011] Figure 1 is a schematic side view of a railway vehicle 1 to which an interior lighting device 2 according to an embodiment is attached. As shown in Figure 1, the railway vehicle 1 comprises a car body 10 and a pair of bogies 19 that support both ends of the car body 10 in the longitudinal direction of the vehicle. There are several variations of the railway vehicle 1, and the first to fifth specifications of railway vehicles 1A to 1E will be described later as examples.
[0012] The car body 10 comprises a frame 11, a pair of side structures 12 extending upward from both ends of the frame 11 in the width direction, a pair of end structures 13 extending upward from both ends of the frame 11 in the longitudinal direction, a roof structure 14 connected to the upper ends of the pair of side structures 12 and the pair of end structures 13, and a ceiling panel 15 positioned below the roof structure 14. In Figure 1, one of the side structures 12 is omitted to show the interior of the car body 10. The ceiling panel 15 faces the passenger compartment 18. There are several variations of the ceiling panel 15, and ceiling panels 15A to 15E will be described later as examples.
[0013] Multiple power supply units 3 are arranged on the upper surface of the ceiling panel 15, spaced apart from each other in the longitudinal direction of the vehicle. Each of the multiple power supply units 3 has the function of converting electricity collected from ground equipment such as overhead lines or third rails into DC electricity and then into a predetermined voltage.
[0014] In this embodiment, multiple interior lighting devices 2 are mounted on the ceiling panel 15 in an arrangement along the longitudinal direction of the railway vehicle 1 to illuminate the passenger compartment 18. The interior lighting devices 2 include interior lighting devices 2A to 2C, which will be described later. In this embodiment, the longitudinal direction of each of the multiple interior lighting devices 2 coincides with the longitudinal direction of the vehicle. In this embodiment, one power supply device 3 is connected in series to each of the multiple interior lighting devices 2 via electric wires 4, which will be described later. The ceiling panel 15 and the cover 6, which will be described later, each have holes through which the electric wires 4 pass.
[0015] In this embodiment, electrical equipment 5 is positioned between two interior lighting devices 2 located at the end of the vehicle's longitudinal direction and between two interior lighting devices 2 located at the other end of the vehicle's longitudinal direction. Electrical equipment 5 is connected in series to either of the two adjacent interior lighting devices 2. That is, electrical equipment 5 operates on DC power of a predetermined voltage supplied from the power supply device 3 via the interior lighting devices 2.
[0016] Figure 2 is a cross-sectional view showing an interior lighting device 2A according to an embodiment attached to the mounting surface 6b of a first-specification railway vehicle 1A. Multiple interior lighting devices 2A have similar structures to each other and are attached to the mounting surface 6b of the ceiling panel 15A in the same manner. Therefore, only one interior lighting device 2A will be described below, and similar descriptions for other interior lighting devices 2A will not be repeated. The same applies to interior lighting devices 2B and 2C, which will be described later.
[0017] As shown in FIG. 2, the railway vehicle 1A of the first specification includes a flat ceiling plate 15A and a cover 6A fixed to the lower surface of the ceiling plate 15A. The cover 6A is in the shape of a flat plate extending in the vehicle longitudinal direction. The upper surface 6a of the cover 6A is fixed to the lower surface of the ceiling plate 15A. And a plurality of interior lighting devices 2A are attached to an attachment surface 6b which is the lower surface of the cover 6A facing the passenger compartment 18.
[0018] The interior lighting device 2A is fixed to the attachment surface 6b and includes a housing 20 extending in the longitudinal direction. The housing 20 includes a plurality of outer edge portions 20a extending in different directions when viewed from the longitudinal direction. In the present embodiment, the plurality of outer edge portions 20a include a first outer edge portion 21 extending in the width direction at one end portion of the housing 20 in the thickness direction, a second outer edge portion 22 extending in the thickness direction from one end portion of the first outer edge portion 21 in the width direction, and a third outer edge portion 23 extending in the thickness direction facing the second outer edge portion 22 from the other end portion of the first outer edge portion 21 in the width direction. The housing 20 may be manufactured, for example, by extrusion molding of aluminum, or may be manufactured in other manners.
[0019] The first outer edge portion 21 and the second outer edge portion 22 each have an attachment candidate portion 24A to which a fixture 7 for fixing the housing 20 to the attachment surface 6b can be attached. In the present embodiment, the attachment candidate portion 24A of the first outer edge portion 21 is disposed at an end portion of the first outer edge portion 21 on the side opposite to the second outer edge portion 22 in the width direction, and the attachment candidate portion 24A of the second outer edge portion 22 is disposed at an end portion of the second outer edge portion 22 on the side of the first outer edge portion 21 in the thickness direction. In the present embodiment, the third outer edge portion 23 does not have an attachment candidate portion 24A.
[0020] The mounting candidate portion 24A includes a washer space 25 through which a washer 8 is positioned, through which the fastener 7 is inserted, and a slit 26 extending longitudinally so as to open the washer space 25 outward toward the housing 20, through which the fastener 7 can pass. When the interior lighting device 2A is attached to the mounting surface 6b of the first specification railway vehicle 1A, the mounting candidate portion 24A of the first outer edge portion 21 is selected as the mounting target for the fastener 7, and the mounting candidate portion 24A of the second outer edge portion 22 is not selected as the mounting target for the fastener 7. The fastener 7 may be, for example, a blind rivet, a bolt, or another fastener that can attach the housing 20 to the mounting surface 6b. The washer 8 may have a shape that extends longitudinally. In such a case, the washer 8 may have, for example, a plurality of holes spaced apart from each other in the longitudinal direction, through which the fastener 7 is inserted. Alternatively, the washer 8 may have a shape and size corresponding to one fastener 7 and have only one hole through which the fastener 7 is inserted. In such a case, multiple washers 8 may be arranged in the washer space 25 of the mounting candidate portion 24A. Then, only one fastener 7 may be inserted through each of the multiple washers 8.
[0021] The housing 20 further includes a fixed portion 27 to which the circuit board 31 of the light source module 30, described later, is fixed. The fixed portion 27 is plate-shaped and extends in the longitudinal direction. The fixed portion 27 extends along the width direction from the central part in the thickness direction of the second outer edge portion 22 toward the third outer edge portion 23. The end of the fixed portion 27 toward the third outer edge portion 23 in the width direction faces the third outer edge portion 23 without contacting it.
[0022] The housing 20 further comprises an internal space 28 defined by a first outer edge 21, a second outer edge 22, a third outer edge 23, and a fixed portion 27. In this embodiment, the internal space 28 is defined by the first outer edge 21, the portion of the second outer edge 22 from the end on the first outer edge 21 side to the center in the thickness direction, the portion of the third outer edge 23 from the end on the first outer edge 21 side to the center in the thickness direction, and the fixed portion 27. The electric wire 4 is arranged in the internal space 28. In this embodiment, the electric wire 4 is arranged in the internal space 28 by being placed on the surface 27a of the fixed portion 27 facing the first outer edge 21. The electric wire 4 includes a positive electric wire 4a electrically connected to the positive conductor of the circuit board 31 of the light source module 30, which will be described later, and a negative electric wire 4b electrically connected to the negative conductor of the circuit board 31. The positive wire 4a and the negative wire 4b are arranged to supply DC power of a predetermined voltage from the power supply unit 3 to the indoor lighting unit 2A, respectively.
[0023] The housing 20 further has a light-transmitting cover retaining groove 29 that extends in the longitudinal direction and into which the end of the light-transmitting cover 35, described later, in the width direction is inserted. In this embodiment, the housing 20 has two light-transmitting cover retaining grooves 29. The tip portion 22a of the second outer edge portion 22, which is located on the opposite side of the first outer edge portion 21 in the thickness direction, bends in the width direction toward the third outer edge portion 23 and extends diagonally downward, and one light-transmitting cover retaining groove 29 is positioned so as to be recessed from the tip of this tip portion 22a. Similarly, the tip portion 23a of the third outer edge portion 23, which is located on the opposite side of the first outer edge portion 21 in the thickness direction, bends in the width direction toward the second outer edge portion 22 and extends diagonally downward, and the other light-transmitting cover retaining groove 29 is positioned so as to be recessed from the tip of this tip portion 23a. Then, one end of the light-transmitting cover 35 in the width direction is inserted into one of the light-transmitting cover retaining grooves 29, and the other end of the light-transmitting cover 35 in the width direction is inserted into the other light-transmitting cover retaining groove 29. In this way, the housing 20 holds the light-transmitting cover 35.
[0024] The indoor lighting device 2A further comprises a light source module 30 held in a housing 20. The housing 20 may hold multiple light source modules 30 arranged in the longitudinal direction. In such a case, the multiple light source modules 30 may be connected in series.
[0025] The light source module 30 includes a circuit board 31 and a light source 32 mounted on the circuit board 31. The circuit board 31 is fixed to the side opposite to the side 27a of the fixed portion 27. The light source module 30 may have one light source 32 or may have multiple light sources 32. The multiple light sources 32 may be arranged in a line in the longitudinal direction, in a line in the width direction, or in a line in both the longitudinal and width directions. The light source module 30 may be, for example, an LED module, a fluorescent lamp module, or another light source module capable of illuminating the passenger compartment 18.
[0026] The indoor lighting device 2A is further equipped with a light-transmitting cover 35 held in a housing 20, through which light from the light source module 30 is transmitted. The light-transmitting cover 35 is held in the housing 20 so as to cover the light source module 30 in the thickness direction from the opposite side of the first outer edge 21. In this embodiment, the light-transmitting cover 35 has a curved shape that protrudes in the thickness direction opposite to the first outer edge 21 when viewed from the longitudinal direction, and extends in the longitudinal direction. In this embodiment, as described above, the light-transmitting cover 35 is held in the housing 20 by two light-transmitting cover retaining grooves 29. The light-transmitting cover 35 may be glass, glass with a light-diffusing sheet attached, FRP (Fiber Reinforced Plastics), or other light-transmitting cover through which light from the light source module 30 is transmitted. The light-transmitting cover 35 may be milky white, transparent, or another color through which light from the light source module 30 is transmitted.
[0027] According to the configuration described above, the mounting target for the fastener 7 can be selected from among the multiple mounting candidate portions 24A of the outer edge portion 20a of the housing 20, depending on the specifications of the railway vehicle 1. By selecting which of the multiple mounting candidate portions 24A is selected, the positional relationship between the mounting surface 6b of the railway vehicle 1 and the light source module 30 can be changed. Therefore, a standardized interior lighting device 2A can be provided for railway vehicles 1 with various specifications.
[0028] Since the first outer edge portion 21 and the second outer edge portion 22 each have mounting candidate portions 24A, a standardized interior lighting device 2A can be provided for various specifications of railway vehicles 1 while maintaining a simple structure. For example, as shown in Figure 2, when the interior lighting device 2A is attached to the mounting surface 6b of a railway vehicle 1A of the first specification, by selecting the mounting candidate portion 24A of the first outer edge portion 21 as the mounting target for the fixing device 7, the light source module 30 with the light source 32 facing downwards can be positioned below the ceiling panel 15A and exposed to the passenger compartment 18. By positioning the interior lighting device 2A in this way, the passenger compartment 18 of the railway vehicle 1A of the first specification can be illuminated suitably and directly. Mounting methods for the interior lighting device 2A for other specifications of railway vehicles 1 will be described later.
[0029] Since the housing 20 has an internal space 28 defined by the first outer edge 21, the second outer edge 22, the third outer edge 23, and the fixed portion 27, the indoor lighting device 2A can be miniaturized while the heat generated by the light source module 30 can be absorbed by the fixed portion 27 and appropriately released into the internal space 28. The internal space 28 can also be used, for example, as a space for arranging the power lines 4 that supply power to the light source module 30.
[0030] Since the mounting candidate section 24A is located on the opposite side of the light source 32 from the circuit board 31 in the thickness direction, the indoor lighting device 2A can be properly attached to the mounting surface 6b using the fixing device 7 while allowing light from the light source 32 to be emitted well.
[0031] By inserting the light-transmitting cover 35 into the light-transmitting cover retaining groove 29, the light-transmitting cover 35 is held in place by the housing 20, allowing the light-transmitting cover 35 to be easily attached to the housing 20.
[0032] Since the mounting candidate section 24A has a washer space 25 in which the washer 8 is placed and a slit 26 through which the fastener 7 can pass, the indoor lighting device 2A can be properly attached to the mounting surface 6b using the fastener 7 and the washer 8.
[0033] The first specification railway vehicle 1A is equipped with multiple interior lighting devices 2A mounted on the mounting surface 6b in a line on the vehicle body 10, so that the positional relationship between the mounting surface 6b and each light source module 30 is appropriate and the passenger compartment 18 is well illuminated. The second to fifth specification railway vehicles 1B to 1E, which will be described later, will have the same effect.
[0034] Figure 3 is a cross-sectional view showing the interior lighting device 2A according to the embodiment attached to the mounting surface 6b of the second specification railway vehicle 1B. As shown in Figure 3, the second specification railway vehicle 1B comprises a ceiling plate 15B having an elongated hole 15a extending in the longitudinal direction of the vehicle, and a cover 6B fixed to the ceiling plate 15B. The cover 6B has a plate-shaped main portion 40 extending in the longitudinal direction of the vehicle, and a groove portion 40a that is recessed from the center of the main portion 40 in the vehicle width direction and extends in the longitudinal direction of the vehicle. The groove portion 40a has a shape and size corresponding to the interior lighting device 2A when viewed from the longitudinal direction of the vehicle.
[0035] With the groove 40a of the cover 6B fitted into the elongated hole 15a of the ceiling panel 15B, the upper surface of the main part 40 of the cover 6B is fixed to the lower surface of the ceiling panel 15B. Then, with the interior lighting device 2A fitted into the groove 40a, it is attached to the wall surface of the groove 40a by fasteners 7 attached to the mounting candidate parts 24A of the first outer edge 21 and the second outer edge 22, respectively. That is, in the second specification railway vehicle 1B, the wall surface of the groove 40a is the mounting surface 6b. As described above, by selecting the mounting candidate parts 24A of the first outer edge 21 and the second outer edge 22 as the mounting targets for the fasteners 7, the light source module 30 with the light source 32 facing downwards can be arranged in a manner in which only the light-transmitting cover 35 is exposed to the passenger compartment 18 and embedded in the ceiling panel 15A. This allows the passenger compartment 18 of the second specification railway vehicle 1B to be illuminated suitably and directly.
[0036] Figure 4 is a cross-sectional view showing the interior lighting device 2A according to the embodiment attached to the mounting surface 6b of the third specification railway vehicle 1C. As shown in Figure 4, the third specification railway vehicle 1C comprises a ceiling plate 15C having an elongated hole 15a extending in the longitudinal direction of the vehicle, and a cover 6C fixed to the ceiling plate 15C. The ceiling plate 15C has the same structure as the ceiling plate 15B except for the dimensions of the elongated hole 15a in the vehicle width direction, so the same reference numbers are used for the same parts, and the same explanations are not repeated. The same applies to the ceiling plates 15D and 15E described later. The cover 6C has a first part 41 which is one end in the vehicle width direction, a second part 42 which includes the other end in the vehicle width direction and extends in the vehicle width direction, and a third part 43 which connects the first part 41 and the second part 42 to each other.
[0037] The first part 41 is plate-shaped and extends in the longitudinal direction of the vehicle. The upper surface of the first part 41 is fixed to the adjacent edge portion 15b on one side in the vehicle width direction to the elongated hole 15a on the lower surface of the ceiling plate 15C. The second part 42 is plate-shaped and extends in the longitudinal direction of the vehicle, but has a larger dimension in the vehicle width direction compared to the first part 41. One side of the second part 42 in the vehicle width direction is positioned above the elongated hole 15a of the ceiling plate 15C, and the other side of the second part 42 in the vehicle width direction is positioned above the adjacent edge portion 15c on the other side in the vehicle width direction to the elongated hole 15a of the ceiling plate 15C. The other side of the second part 42 in the vehicle width direction is spaced in the height direction from the upper surface of the ceiling plate 15C by a distance corresponding to the width dimension of the interior lighting device 2A, and has a dimension in the vehicle width direction corresponding to the thickness dimension of the interior lighting device 2A. The third portion 43, when viewed from the longitudinal direction of the vehicle, rises from the end of the first portion 41 on the side of the second portion 42 in the vehicle width direction, passes through the elongated hole 15a of the ceiling panel 15C, curves and extends in the vehicle width direction and upward, and connects to the end of the second portion 42 on the side of the first portion 41 in the vehicle width direction. The lower surface of the third portion 43 may be reflective so as to reflect light from the light source 32 and suitably illuminate the passenger compartment 18.
[0038] The interior lighting device 2A is fitted between the edge portion 15b of the ceiling panel 15C and the other portion of the second portion 42 of the cover 6B in the vehicle width direction, and is attached to the lower surface of the cover 6B by a fastener 7 attached to the mounting candidate portion 24A of the second outer edge portion 22. That is, in the third specification railway vehicle 1C, the lower surface of the cover 6C is the mounting surface 6b. As described above, by selecting the mounting candidate portion 24A of the second outer edge portion 22 as the mounting target for the fastener 7, a light source module 30 in which the light source 32 is oriented in the vehicle width direction can be placed on the upper surface of the ceiling panel 15C so that the light from the light source 32 hits the lower surface of the third portion 43 of the cover 6B. By arranging the interior lighting device 2A in this way, the passenger compartment 18 of the third specification railway vehicle 1C can be illuminated suitably and indirectly.
[0039] Figure 5 is a cross-sectional view of the interior lighting device 2B according to the first modified example, attached to the mounting surface 6b of the railway vehicle 1A of the first specification. The interior lighting device 2B has generally the same structure as the interior lighting device 2A, except for the mounting candidate portion 24A of the first outer edge portion 21, the third outer edge portion 23, and the fixed portion 27. Furthermore, the interior lighting device 2B is attached to the mounting surface 6b of the first specification in the same manner as the interior lighting device 2A. Therefore, the same reference numerals are used for the same parts, and similar explanations are not repeated.
[0040] As shown in Figure 5, in this modified example, the mounting candidate portion 24A of the first outer edge portion 21 is located in the central part of the first outer edge portion 21 in the width direction. In this modified example, in addition to the first outer edge portion 21 and the second outer edge portion 22 having mounting candidate portions 24A, the third outer edge portion 23 also has mounting candidate portions 24A. In this modified example, the end of the fixed portion 27 on the third outer edge portion 23 side in the width direction is connected to the third outer edge portion 23. In this modified example, when viewed from the longitudinal direction, the housing 20 is symmetrical with respect to the center line CL1 that passes through the center in the width direction and extends in the thickness direction, so that the mounting candidate portion 24A of the first outer edge portion 21 intersects with the center line CL1, and the mounting candidate portion 24A of the third outer edge portion 23 is in the same position in the thickness direction as the mounting candidate portion 24A of the second outer edge portion 22.
[0041] According to the above configuration, a standardized interior lighting device 2B can be provided for railway vehicles 1 with even more diverse specifications. For example, as shown in Figure 5, the interior lighting device 2B can be attached to the mounting surface 6b of a first-specification railway vehicle 1A in the same manner as the interior lighting device 2A by selecting the mounting candidate portion 24A of the first outer edge portion 21 as the mounting target for the fixing device 7.
[0042] Figure 6 is a cross-sectional view of the interior lighting device 2B according to the first modified example, attached to the mounting surface 6b of the railway vehicle 1D of the fourth specification. As shown in Figure 6, the railway vehicle 1D of the fourth specification includes a ceiling plate 15D having an elongated hole 15a extending in the longitudinal direction of the vehicle, and a cover 6D fixed to the ceiling plate 15D. The cover 6D is symmetrical with respect to a center line CL2 that passes through the center in the width direction of the vehicle and extends in the height direction when viewed from the longitudinal direction of the vehicle. The cover 6D has a pair of cover portions 44. The pair of cover portions 44 are symmetrical with respect to the center line CL2 when viewed from the longitudinal direction of the vehicle. Therefore, only one cover portion 44 will be described below, and a similar description of the other cover portion 44 will not be repeated.
[0043] The cover portion 44 has an end portion 44a opposite to the center line CL2 in the vehicle width direction, a pair of side wall portions 44b facing each other in the vehicle width direction, an upper wall portion 44c connecting the upper ends of each of the pair of side wall portions 44b, and a curved portion 44d connecting the lower ends of each of the pair of side wall portions 44b. The end portion 44a is plate-shaped and extends in the longitudinal direction of the vehicle. The upper surface of the end portion 44a is fixed to the elongated hole 15a in the lower surface of the ceiling plate 15D, to adjacent edge portions 15b from one side in the vehicle width direction. The pair of side wall portions 44b and the upper wall portion 44c are each plate-shaped and extend in the longitudinal direction of the vehicle.
[0044] One side wall portion 44b extends in the height direction from the end portion 44a on the side of the centerline CL2 in the vehicle width direction, passes through the elongated hole 15a of the ceiling panel 15D, and connects to the end portion of the upper wall portion 44c on the side of the centerline CL2 in the vehicle width direction. The other side wall portion 44b extends in the height direction on the side of the centerline CL2 in the vehicle width direction than the other side wall portion 44b, and connects to the end portion of the upper wall portion 44c on the side of the centerline CL2 in the vehicle width direction. The upper wall portion 44c is located above the ceiling panel 15D. The curved portion 44d has a curved shape that protrudes upward when viewed from the longitudinal direction of the vehicle, and extends in the longitudinal direction of the vehicle. The lower surface of the curved portion 44d may be reflective so as to reflect light from the light source 32 and suitably illuminate the passenger compartment 18. The curved portion 44d is mainly located above the ceiling panel 15D. The cover portion 44 may further have another pair of side wall portions facing each other in the longitudinal direction of the vehicle. The upper ends of each of these other pair of side wall portions may be connected by an upper wall portion 44c. The lower ends of each of these other pair of side wall portions may be fixed to the ceiling plate 15AD.
[0045] Two interior lighting devices 2B are attached to the cover 6D. One interior lighting device 2B is attached to the underside of the end of the curved portion 44d of one cover portion 44 on the side of the centerline CL2 in the vehicle width direction by a fastener 7 attached to the mounting candidate portion 24A of the second outer edge portion 22. The other interior lighting device 2B is attached to the underside of the end of the curved portion 44d of the other cover portion 44 on the side of the centerline CL2 in the vehicle width direction by a fastener 7 attached to the mounting candidate portion 24A of the third outer edge portion 23. In other words, in the railway vehicle 1D of the fourth specification, the corresponding undersides of each of the pair of cover portions 44 of the cover 6D are the mounting surfaces 6b.
[0046] The fourth specification railway vehicle 1D further comprises a cover member 50A that is attached to two interior lighting devices 2B. The cover member 50A has one side portion 50a in the vehicle width direction, the other side portion 50b in the vehicle width direction, and a central portion 50c that connects the one side portion 50a and the other side portion 50b to each other. The one side portion 50a, the other side portion 50b, and the central portion 50c are each plate-shaped and extend in the longitudinal direction of the vehicle. The one side portion 50a is fixed to one interior lighting device 2B by a fastener 7 attached to a mounting candidate portion 24A of the third outer edge portion 23. The other side portion 50b is fixed to the other interior lighting device 2B by a fastener 7 attached to a mounting candidate portion 24A of the second outer edge portion 22. When the cover member 50A is attached to the two interior lighting devices 2B, the thickness direction of the central portion 50c coincides with the height direction, one side portion 50a rises from one end of the central portion 53 in the vehicle width direction and extends diagonally upward away from the center line CL2, and the other side portion 50b rises from the other end of the central portion 53 in the vehicle width direction and extends diagonally upward away from the center line CL2.
[0047] According to the above configuration, by selecting the mounting candidate portion 24A of the second outer edge portion 22 as the mounting target for the fixing device 7, one interior lighting device 2B can be attached to one cover portion 44 of the cover 6D with the light source 32 facing diagonally upward so that the light from the light source 32 hits the lower surface of the curved portion 44d of one of the cover portions 44. Similarly, by selecting the mounting candidate portion 24A of the third outer edge portion 23 as the mounting target for the fixing device 7, the other interior lighting device 2B can be attached to the other cover portion 44 of the cover 6D with the light source 32 facing diagonally upward so that the light from the light source 32 hits the lower surface of the curved portion 44d of the other cover portion 44. By arranging the two interior lighting devices 2B as described above, the passenger compartment 18 of the fourth specification railway vehicle 1D can be suitably and indirectly illuminated.
[0048] For each of the two housings 20, the cover member 50A can be attached to the mounting candidate portion 24A that is exposed to the passenger compartment 18 using the fastener 7 attached to this mounting candidate portion 24A. This prevents the mounting candidate portion 24A from being exposed to the passenger compartment 18 and spoiling the aesthetics.
[0049] Figure 7 is a cross-sectional view of the interior lighting device 2B according to the first modified example, attached to the mounting surface 6b of the fifth specification railway vehicle 1E. As shown in Figure 7, the fifth specification railway vehicle 1E comprises a ceiling plate 15E having an elongated hole 15a extending in the longitudinal direction of the vehicle, and a cover 6E fixed to the ceiling plate 15E. The cover 6E is symmetrical with respect to a center line CL2 that passes through the center in the width direction of the vehicle and extends in the height direction when viewed from the longitudinal direction of the vehicle. The cover 6E has one end 45 in the width direction of the vehicle, the other end 46 in the width direction of the vehicle, and a curved portion 47 that connects the one end 45 and the other end 46 to each other. The one end 45 is plate-shaped and extends in the longitudinal direction of the vehicle. The upper surface of the one end 45 is fixed to the edge portion 15b adjacent to the elongated hole 15a on the lower surface of the ceiling plate 15E from one side in the width direction of the vehicle. The other end 46 is plate-shaped and extends in the longitudinal direction of the vehicle. The upper surface of the other end 46 is fixed to the adjacent edge portion 15c in the other side in the vehicle width direction of the elongated hole 15a in the lower surface of the ceiling panel 15E. The curved portion 47 has a curved shape that protrudes upward when viewed from the longitudinal direction of the vehicle and extends in the longitudinal direction of the vehicle. The lower surface of the curved portion 47 may be reflective so as to reflect light from the light source 32 and suitably illuminate the passenger compartment 18. The curved portion 47 is mainly located above the ceiling panel 15E.
[0050] Two interior lighting devices 2B are attached to the cover 6E. One interior lighting device 2B is attached to the underside of the central part of the curved portion 47 of the cover 6E in the vehicle width direction, on the side of the edge portion 15b that is closer to the center line CL2, by a fastener 7 attached to the mounting candidate portion 24A of the second outer edge portion 22. The other interior lighting device 2B is attached to the underside of the central part of the curved portion 47 of the cover 6E in the vehicle width direction, on the side of the edge portion 15c that is closer to the center line CL2, by a fastener 7 attached to the mounting candidate portion 24A of the third outer edge portion 23. In other words, in the fifth specification railway vehicle 1E, the underside of the central part of the curved portion 47 of the cover 6E in the width direction is the mounting surface 6b.
[0051] The fifth specification railway vehicle 1E further comprises a cover member 50B that is attached to two interior lighting devices 2B. The cover member 50B is plate-shaped and extends in the longitudinal direction of the vehicle. One side of the cover member 50B in the vehicle width direction is fixed to one interior lighting device 2B by a fastener 7 attached to a mounting candidate portion 24A of the third outer edge portion 23. The other side of the cover member 50B in the vehicle width direction is fixed to the other interior lighting device 2B by a fastener 7 attached to a mounting candidate portion 24A of the second outer edge portion 22.
[0052] According to the above configuration, by selecting the mounting candidate portion 24A of the second outer edge portion 22 as the mounting target for the fixing device 7, one interior lighting device 2B can be attached to the curved portion 47 of the cover 6E in the vehicle width direction with the light source 32 facing one side in the vehicle width direction so that the light from the light source 32 hits one side of the lower surface of the curved portion 47 of the cover 6E in the vehicle width direction. Similarly, by selecting the mounting candidate portion 24A of the third outer edge portion 23 as the mounting target for the fixing device 7, the other interior lighting device 2B can be attached to the curved portion 47 of the cover 6E in the vehicle width direction with the light source 32 facing the other side in the vehicle width direction so that the light from the light source 32 hits the other side of the lower surface of the curved portion 47 of the cover 6E in the vehicle width direction. By arranging the two interior lighting devices 2B as described above, the passenger compartment 18 of the fifth specification railway vehicle 1E can be suitably and indirectly illuminated.
[0053] Figure 8 is a cross-sectional view of the interior lighting device 2C according to the second modified example, attached to the mounting surface 6b of the railway vehicle 1A of the first specification. Except for the mounting candidate parts 24B, the fixed part 27, and the internal space 28, the interior lighting device 2C has generally the same structure as the interior lighting device 2B. Therefore, the same reference numbers are used for the same parts, and similar explanations are not repeated.
[0054] As shown in Figure 8, in this modified example, the first outer edge portion 21, the second outer edge portion 22, and the third outer edge portion 23 each have mounting candidate portions 24B. Each mounting candidate portion 24B is a groove that is recessed from the outer surface of the housing 20 and extends in the longitudinal direction. The peripheral portion of each mounting candidate portion 24B is thicker than the other portions. For example, an operator may use various tools to form a hole in the mounting candidate portion 24B and the peripheral portion of the mounting candidate portion 24B through which the fastener 7 can pass, and then attach the fastener 7 to the hole. If the fastener 7 is a male screw member, the hole may have a screw groove, and the fastener 7 may be screwed into the screw groove.
[0055] In this modified example, the fixed portion 27 has a first fixed portion 27b that extends from the central part in the thickness direction of the second outer edge portion 22 toward the third outer edge portion 23 along the width direction to just before the center line CL2, and a second fixed portion 27c that extends from the central part in the thickness direction of the third outer edge portion 23 toward the second outer edge portion 22 along the width direction to just before the center line CL2. The first fixed portion 27b and the second fixed portion 27c are positioned at the same location in the thickness direction. That is, the housing 20 has a gap 27d between the end of the first fixed portion 27b toward the center line CL2 in the width direction and the end of the second fixed portion 27c toward the center line CL2 in the width direction. The light source module 30 is fixed to the lower surfaces of the first fixed portion 27b and the second fixed portion 27c such that they block at least a portion of the gap 27d when viewed from below.
[0056] With the above configuration, similar to the interior lighting device 2B described in the first modified example, a standardized interior lighting device 2B can be provided for a wider variety of railway vehicle specifications 1. Furthermore, the mounting candidate portion 24B is smaller and less conspicuous than the mounting candidate portion 24A described in the above embodiment and the first modified example, so it does not detract from the aesthetics even when exposed in the passenger compartment 18. Also, because the mounting candidate portion 24B is small and inconspicuous, the internal space 28 can be enlarged while miniaturizing the entire device. This prevents the temperature of the internal space 28 from rising too high due to heat emitted from the light source module 30. In addition, wiring work to the internal space 28 can be easily performed. Furthermore, since the surrounding portion of each mounting candidate portion 24B is thicker than other parts, it is possible to prevent damage to the housing 20 when drilling each mounting portion 22B and the surrounding portion of each mounting portion 22B.
[0057] The technology of this disclosure is not limited to the configuration described above. For example, the interior lighting device 2 may include an interior lighting device according to a third modification, which has a structure in which the interior lighting device 2A is inverted in the width direction when viewed from the longitudinal direction. By combining the interior lighting device 2A and the interior lighting device according to the third modification, the interior lighting device 2A and the interior lighting device according to the third modification can be attached to the mounting surface 6b of the fourth specification railway vehicle 1D described with reference to Figure 6 and the fifth specification railway vehicle 1E described with reference to Figure 7 in the same manner as the interior lighting device 2B. In such a case, cover members 50A and 50B are not attached to the interior lighting device 2A and the interior lighting device according to the third modification.
[0058] The above description described the case where the first outer edge portion 21 and the second outer edge portion 22 each have a mounting candidate portion 24A or 24B. However, the description is not limited to this case; if the third outer edge portion 23 has a mounting candidate portion 24A or 24B, then either the first outer edge portion 21 or the second outer edge portion 22 does not need to have a mounting candidate portion 24A or 24B.
[0059] The above description described a case where the multiple outer edges 20a include a first outer edge 21, a second outer edge 22, and a third outer edge 23. However, the description is not limited to this case, and the multiple outer edges 20a may further include other outer edges extending in directions different from each other when viewed from the longitudinal direction, in addition to the first outer edge 21, the second outer edge 22, and the third outer edge 23. Also, the above description described a case where the second outer edge 22 and the third outer edge 23 each extend perpendicular to the first outer edge 21 when viewed from the longitudinal direction. However, the description is not limited to this case, and the second outer edge 22 and the third outer edge 23 each extend inclined with respect to the first outer edge 21 when viewed from the longitudinal direction. Furthermore, the multiple outer edges 20a may consist only of the first outer edge 21 and the second outer edge 22, or only of the first outer edge 21 and the third outer edge 23.
[0060] The above description describes the case where the indoor lighting device 2A is attached to the mounting surfaces 6b of each of the covers 6A to 6C, and the indoor lighting devices 2B and 2C are attached to the mounting surfaces 6b of covers 6A, 6D, and 6E, respectively. However, the description is not limited to this case, and the indoor lighting devices 2A to 2C may each be directly attached to the underside of the ceiling panel 15A without using the cover 6A. In such a case, the underside of the ceiling panel 15A may be the mounting surface. In addition, the indoor lighting devices 2B and 2C may each be attached to the mounting surfaces 6b of covers 6B and 6C, respectively, in the same manner as the indoor lighting device 2A. Furthermore, the indoor lighting devices 2A to 2C may each be attached to the mounting surfaces of covers having structures other than those of covers 6A to 6E. Alternatively, the indoor lighting device 2 may be attached to the surface of a bracket that is connected to the roof structure 14 and accessible from the opening in the ceiling panel 15. In such a case, the surface of the bracket may be the mounting surface.
[0061] The above description describes a case where multiple power supply units 3 are arranged on the upper surface of the ceiling panel 15 at intervals from each other in the longitudinal direction of the vehicle. However, the description is not limited to this case, and only one power supply unit 3 may be arranged at one end of the vehicle body 10 in the longitudinal direction of the vehicle. In such a case, for example, multiple interior lighting devices 2A may be connected in series with each other, and the interior lighting device 2A located at one end of the vehicle in the longitudinal direction may be connected in series with the power supply unit 3. With such a configuration, it is not necessary to arrange a power supply unit 3 for each of the multiple interior lighting devices 2A, thus reducing the burden of wiring and maintenance work in the attic space above the ceiling panel 15A. Multiple interior lighting devices 2B, 2C can also be connected in series with one power supply unit 3 in the same manner as multiple interior lighting devices 2A.
[0062] The above description describes a case where the positive wire 4a and negative wire 4b for supplying power from the power supply unit 3 to the interior lighting device 2A are arranged in the internal space 28 of the housing 20. However, the description is not limited to this case, and for example, the railway vehicle 1 may further include a battery attached to the vehicle body 10, an emergency interior lighting device to which DC power output from the battery and converted to a predetermined voltage by the power supply unit 3 is supplied, and an emergency positive wire and an emergency negative wire for connecting the battery, the emergency interior lighting device, and the power supply unit 3 in series. In addition to the positive wire 4a and the negative wire 4b, the emergency positive wire and the emergency negative wire may also be arranged in the internal space 28. In such a case, for example, the emergency interior lighting device may be mounted on the mounting surface 6b of the vehicle body 10 in a row together with a plurality of interior lighting devices 2A. In such a case, multiple indoor lighting devices 2A may be connected in series with each other by positive wires 4a and negative wires 4b and connected in series with one power supply device 3, and the emergency indoor lighting device may be connected in series with the one power supply device 3 by the emergency positive wire and the emergency negative wire. The emergency indoor lighting device may, for example, have the same structure as any of the indoor lighting devices 2A to 2C and be mounted on the mounting surface 6b of any of the covers 6A to 6E in the same manner as any of the indoor lighting devices 2A to 2C.
[0063] The above description describes the case in which any of the interior lighting devices 2A to 2C are attached to the mounting surface 6b of the railway vehicle 1. However, the description is not limited to this case, and two or three of the interior lighting devices 2A to 2C may be attached to the mounting surface 6b of the railway vehicle 1.
[0064] The above description describes the case in which any of the interior lighting devices 2A to 2C are attached to the mounting surface 6b of the railway vehicle 1. However, the description is not limited to this case, and any of the interior lighting devices 2A to 2C may be attached to the mounting surface of a vehicle other than the railway vehicle 1, such as a large automobile.
[0065] Each of the following embodiments is a disclosure of a preferred embodiment. [Aspect 1] An interior lighting device that is attached to the mounting surface of a railway vehicle in order to illuminate the passenger compartment of the railway vehicle, A housing fixed to the mounting surface and extending in the longitudinal direction, The housing comprises a light source module held within the housing, The housing includes a plurality of outer edges that extend in different directions when viewed from the longitudinal direction, An interior lighting device for a railway vehicle, wherein at least two of the plurality of outer edges each have a mounting candidate portion to which a fastener for fixing the housing to the mounting surface can be attached. [Aspect 2] The plurality of outer edges include a first outer edge extending in a width direction perpendicular to the longitudinal direction, and a second outer edge extending in a thickness direction perpendicular to the longitudinal direction and the width direction. The interior lighting device for a railway vehicle according to Embodiment 1, wherein the first outer edge and the second outer edge each have the mounting candidate portion. [Aspect 3] The plurality of outer edges further include a third outer edge that extends in the thickness direction opposite to the second outer edge in the width direction, The light source module comprises a circuit board and a light source mounted on the circuit board. The aforementioned enclosure is The part to which the circuit board is fixed, An interior lighting device for a railway vehicle according to embodiment 2, further comprising: an interior space defined by the first outer edge, the second outer edge, the third outer edge, and the fixed portion. [Aspect 4] The light source module comprises a circuit board and a light source mounted on the circuit board. The interior lighting device for a railway vehicle according to Embodiment 1, wherein the mounting candidate portion is located on the opposite side from the light source with respect to the circuit board in the thickness direction perpendicular to the longitudinal direction. [Aspect 5] The housing is further equipped with a light-transmitting cover that is held in place and through which light from the light source module is transmitted, The interior lighting device for a railway vehicle according to Embodiment 1, wherein the housing further has a light-transmitting cover retaining groove that extends in the longitudinal direction and into which the end of the light-transmitting cover in the width direction is inserted. [Aspect 6] The interior lighting device for a railway vehicle according to Embodiment 1, wherein the mounting candidate portion includes a washer space through which a washer is inserted and a slit extending in the longitudinal direction so as to open the washer space toward the outside of the housing and through which the fastener can pass. [Aspect 7] A vehicle body having the mounting surface, A railway vehicle comprising an interior lighting device according to any one of embodiments 1 to 6, wherein a plurality of interior lighting devices are mounted on the mounting surface in a manner arranged in the vehicle body. [Explanation of Symbols]
[0066] 1,1A to 1E Railway vehicles 2,2A to 2C indoor lighting system 3 Power supply 6b Mounting surface 7 Fixtures 8 Washers 15,15A to 15E Ceiling board 18 guest rooms 20 cabinets 20a Outer edge 21 First outer edge 22 Second outer edge 23 Third outer edge 24A, 24B Mounting candidate parts 25 Washer space 26 slits 27 Fixed part 28 Interior space 29 Light-transmitting cover retaining groove 30 Light Source Modules 31 Circuit board 32 light source 35 Light-transmitting cover
Claims
1. An interior lighting device that is attached to the mounting surface of a railway vehicle in order to illuminate the passenger compartment of the railway vehicle, A housing fixed to the mounting surface and extending in the longitudinal direction, The housing comprises a light source module held within the housing, The housing includes a plurality of outer edges that extend in different directions when viewed from the longitudinal direction, An interior lighting device for a railway vehicle, wherein at least two of the plurality of outer edges each have a mounting candidate portion to which a fastener for fixing the housing to the mounting surface can be attached.
2. The plurality of outer edges include a first outer edge extending in a width direction perpendicular to the longitudinal direction, and a second outer edge extending in a thickness direction perpendicular to the longitudinal direction and the width direction. The interior lighting device for a railway vehicle according to claim 1, wherein the first outer edge and the second outer edge each have the mounting candidate portion.
3. The plurality of outer edges further include a third outer edge that extends in the thickness direction opposite to the second outer edge in the width direction, The light source module comprises a circuit board and a light source mounted on the circuit board. The aforementioned enclosure is The part to which the circuit board is fixed, The interior lighting device for a railway vehicle according to claim 2, further comprising: an interior space defined by the first outer edge, the second outer edge, the third outer edge, and the fixed portion.
4. The light source module comprises a circuit board and a light source mounted on the circuit board. The interior lighting device for a railway vehicle according to claim 1, wherein the mounting candidate portion is located on the opposite side from the light source with respect to the circuit board in the thickness direction perpendicular to the longitudinal direction.
5. The housing is further equipped with a light-transmitting cover that is held in place and through which light from the light source module is transmitted, The interior lighting device for a railway vehicle according to claim 1, wherein the housing further has a light-transmitting cover retaining groove that extends in the longitudinal direction and into which the end of the light-transmitting cover in the width direction is inserted.
6. The interior lighting device for a railway vehicle according to claim 1, wherein the mounting candidate portion includes a washer space through which a washer is inserted and a slit extending in the longitudinal direction so as to open the washer space toward the outside of the housing and through which the fastener can pass.
7. A vehicle body having the mounting surface, A railway vehicle comprising an interior lighting device according to any one of claims 1 to 6, wherein a plurality of interior lighting devices are mounted on the mounting surface in an orderly manner on the vehicle body.