Railway vehicle

Abstract

To provide a railway vehicle in which a suspension structure of a vehicle-side-image display can be smaller and lighter, and even one person can safely and easily mount the vehicle-side-image display detachably when mounting it on a front upper ceiling part of a driver seat.SOLUTION: Provided is a railway vehicle 10 in which a vehicle-side-image display 1 for displaying a vehicle-side-image obtained by photographing a vehicle side surface SS including a passenger-side door GT1 from outside the vehicle is mounted on a front upper ceiling part 2 of a driver seat 51 via a suspension structure 2. The suspension structure comprises: a holding metal 3 which holds the vehicle-side-image display; and a mounting box 4 which is mounted on the ceiling part and is overlapped with the holding metal in a vertical direction, and to which the holding metal can detachably be fastened. In an upper end part 3a of the holding metal and a lower end part 4c of the mounting box, locking means KS which is formed so as to be lockable in a state before fastening the holding metal and the mounting box, is arranged at a position different from fastening means TS for fastening the holding metal and the mounting box.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a railway vehicle, and more particularly to a railway vehicle in which a side image display device for displaying a side image of the vehicle including a passenger side door taken from the outside of the vehicle is installed on the ceiling portion above the front of the driver's seat.

Background Art

[0002] Generally, a passenger side door for passengers to get on and off is provided on the side structure of a railway vehicle. The opening and closing operation of the passenger side door is performed by a crew member after confirming the safety of the passengers. On the other hand, in recent years, based on the need to improve the efficiency of vehicle operation, railway vehicles with a reduced number of carriages tend to operate with one-person operation. In this one-person-operated railway vehicle, the driver in the driver's cab of the leading vehicle performs the opening and closing operation of the passenger side door and the safety confirmation associated with the opening and closing operation. Therefore, a railway vehicle provided with a side image display device (monitor for safety confirmation) for displaying a side image of the vehicle including the passenger side door taken from the outside of the vehicle on the ceiling portion above the front of the driver's seat has been studied (see, for example, Patent Document 1).

[0003] In the above Patent Document 1, as shown in FIGS. 17 and 18, in a railway vehicle 100 including a driver's cab 101 where a driver M drives and a passenger side door (not shown) for passengers to get on and off, a side image display device 102 for displaying a video for safety confirmation of passengers when opening and closing the passenger side door is provided, and the side image display device 102 is provided with a suspension structure 104 for suspending and holding it from the ceiling 103 of the driver's cab 101. The suspension structure 104 includes a position changing means 105 (for example, a hinge) capable of moving the side image display device 102 between a first position where the video is located above the field of view of the driver M when the driver M is in the driving posture and a second position different from the first position. A railway vehicle 100 is disclosed.

[0004] Specifically, the suspension structure 104 includes a support column 104a fixed to the ceiling 103, a hinge 105 with one end fastened to the support column 104a, a rotating member 104b fastened to the other end of the hinge 105, a retaining member 104c connected to the rotating member 104b and holding the vehicle-side image display 102, and a positioning member 104d for fixing the vehicle-side image display 102 at the first position. The positioning member 104d is fastened to the retaining member 104c and fixed to the ceiling 103 at the first position of the vehicle-side image display 102.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the railway vehicle 100 described in the above Patent Document 1, the suspension structure 104 that suspends and holds from the ceiling 103 of the driver's cab 101 has a position-changing means 105 (for example, a hinge) that can move the vehicle-side image display 102 between a first position where the image is located above the driver M's field of vision when the driver M is in the driving position and a second position different from the first position. Therefore, the suspension structure 104 that holds the vehicle-side image display 102 has a large and complex structure, and there is a problem that its weight also increases.

[0007] In addition, in the driver's cab 101 of the railway vehicle, a large number of various instruments and operating devices are arranged, and the space is narrow. Therefore, it is necessary to install the vehicle-side image display 102 held by the suspension structure 104 on the ceiling 103 by one person. In that case, in a narrow space, while supporting the large and heavy suspension structure 104 and the vehicle-side image display 102 with one hand, the other hand has to perform fastening work such as bolts and nuts. However, such a one-person operation is not easy.

[0008] In addition, the work of installing the vehicle-side image display 102 on the ceiling 103 is an upward work in a narrow space and needs to be carried out by one person. Therefore, it is desirable that the vehicle-side image display 102 can be safely and easily attached and detached by one person.

[0009] The present invention has been made to solve such problems, and an object thereof is to provide a railway vehicle capable of miniaturizing and reducing the weight of a suspension structure of a vehicle-side image display, and installing the vehicle-side image display on the ceiling portion above the front of the driver's seat safely and easily even by one person.

Means for Solving the Problems

[0010] To achieve the above object, a railway vehicle according to the present invention has the following configuration. (1) A railway vehicle in which a vehicle-side image display for displaying a vehicle-side image taken from the outside of the vehicle of a vehicle side including a passenger-side door is installed on a ceiling portion above the front of a driver's seat via a suspension structure, The suspension structure includes a holding metal for holding the vehicle-side image display, and a mounting box installed on the ceiling portion and overlapping the holding metal in the vertical direction, and the holding metal is detachably fastened to the mounting box. The upper end portion of the holding metal and the lower end portion of the mounting box are provided with locking means formed so as to be lockable in a state before fastening the holding metal and the mounting box at a position different from the fastening means for fastening the holding metal and the mounting box.

[0011] In the present invention, the suspension structure includes a holding metal for holding the vehicle-side image display, and a mounting box installed on the ceiling portion and overlapping the holding metal in the vertical direction, and the holding metal is detachably fastened to the mounting box. The upper end portion of the holding metal and the lower end portion of the mounting box are provided with locking means formed so as to be lockable in a state before fastening the holding metal and the mounting box at a position different from the fastening means for fastening the holding metal and the mounting box. Therefore, the suspension structure of the vehicle-side image display can be miniaturized and reduced in weight, and the vehicle-side image display can be installed on the ceiling portion above the front of the driver's seat safely and easily even by one person.

[0012] That is, the suspension structure includes a retaining member that holds the side-of-vehicle image display, and a mounting box installed on the ceiling portion and overlapping with the retaining member in the vertical direction, with the retaining member detachably fastened thereto. Therefore, the suspension structure of the side-of-vehicle image display can be divided vertically into a retaining member that holds the side-of-vehicle image display and a mounting box that can be installed on the ceiling portion in advance. Further, since the retaining member and the mounting box overlap in the vertical direction, the planar occupation space of both can be reduced. Therefore, while dividing the suspension structure of the side-of-vehicle image display into two parts vertically, the divided retaining member and mounting box can be miniaturized and lightened respectively.

[0013] Also, the upper end portion of the retaining member and the lower end portion of the mounting box are provided with locking means formed so as to be lockable in the state before fastening the retaining member and the mounting box at a position different from the fastening means for fastening the retaining member and the mounting box. Therefore, with respect to the mounting box pre-installed on the ceiling portion, by lifting the retaining member that holds the side-of-vehicle image display to the locking position of the locking means at the position before fastening by the fastening means, the retaining member that holds the side-of-vehicle image display can be supported by the mounting box via the locking means, and the fall can be prevented. Further, since the locking means is provided at a position different from the fastening means, the retaining member and the mounting box can be easily fastened by the fastening means without being obstructed by the locking means that supports the retaining member. Therefore, with respect to the mounting box pre-installed on the ceiling portion in front of the driver's seat, the retaining member that holds the side-of-vehicle image display can be fastened detachably safely and easily by one person.

[0014] Therefore, according to the present invention, it is possible to provide a railway vehicle in which the suspension structure of the side-of-vehicle image display can be miniaturized and lightened, and the side-of-vehicle image display can be installed detachably safely and easily by one person with respect to the ceiling portion in front of the driver's seat.

[0015] (2) In the railway vehicle according to (1), The locking means includes a claw portion formed on either one of the upper end portion of the retaining member or the lower end portion of the mounting box so as to be insertable into the other side, and a receiving portion formed on the other side. The claw portion and the receiving portion are configured to be locked in the vertical direction before the fastening of the holding metal and the mounting box, and to be disengaged in the vertical direction after the fastening.

[0016] In the present invention, the locking means includes a claw portion formed on either the upper end portion of the holding metal or the lower end portion of the mounting box so as to be insertable into the other side, and a receiving portion formed on the other side. Since the claw portion and the receiving portion are formed so as to be locked in the vertical direction before the fastening of the holding metal and the mounting box and to be disengaged in the vertical direction after the fastening, before the holding metal and the mounting box are fastened by the fastening means, the mounting box can support the holding metal by the claw portion and the receiving portion being locked in the vertical direction.

[0017] Therefore, while confirming the state in which the claw portion and the receiving portion are locked, the hand can be released from the holding metal that holds the vehicle-side image display, and the holding metal and the mounting box can be fastened by the fastening means. As a result, the holding metal of the vehicle-side image display can be safely and easily fastened by one person to the mounting box installed on the ceiling portion above the front of the driver's seat. Further, after the holding metal of the vehicle-side image display is fastened to the mounting box, since the claw portion and the receiving portion are disengaged in the vertical direction, it is possible to avoid the claw portion and the receiving portion interfering with each other during the running of the vehicle and generating abnormal noises or the like.

[0018] (3) In the railway vehicle according to (2), The fastening means includes a plurality of male screw portions that stand up on either the upper end portion of the holding metal or the lower end portion of the mounting box to the other side, and a long-hole-shaped fastening hole formed so as to be relatively movable with respect to the male screw portions from the screw insertion position to the screw fastening position in a state where the male screw portions are inserted through the other side. The claw portion or the receiving portion moves to the locking position with the receiving portion or the claw portion as the male screw portion relatively moves from the screw insertion position to the screw fastening position, and moves to the separation position from the receiving portion or the claw portion as the male screw portion relatively moves from the screw fastening position to the screw insertion position.

[0019] In the present invention, as fastening means, a plurality of male screw portions standing upright to the other side are provided on either the upper end portion of the holding metal or the lower end portion of the mounting box, and a long hole-shaped fastening hole formed to be relatively movable with respect to the male screw portions from the screw insertion position to the screw fastening position with the male screw portions inserted therethrough is provided on the other side. The claw portion or the receiving portion moves to the locking position with the receiving portion or the claw portion as the male screw portions relatively move from the screw insertion position to the screw fastening position, and moves to the separation position from the receiving portion or the claw portion as the male screw portions relatively move from the screw fastening position to the screw insertion position. Therefore, the male screw portions and the fastening hole, which are the fastening means, can also serve as locking guide means for guiding the claw portion or the receiving portion, which is the locking means, to the locking position or the separation position.

[0020] That is, by simply holding the holding metal that holds the vehicle-side image display by hand, inserting the male screw portions into the fastening holes at the screw insertion positions, and relatively moving the male screw portions along the long hole-shaped fastening holes to the screw fastening positions, the claw portion or the receiving portion can be easily moved to the locking position with respect to the receiving portion or the claw portion. Then, when the hand is released from the holding metal that holds the vehicle-side image display with the claw portion or the receiving portion moved to the locking position, the holding metal that holds the vehicle-side image display descends by its own weight until the claw portion and the receiving portion are locked in the vertical direction, but is supported by the mounting box in the state where the claw portion and the receiving portion are locked.

[0021] Therefore, with the claw portion and the receiving portion locked, a nut portion can be engaged with the male screw portions to fasten the holding metal that holds the vehicle-side image display to the mounting box installed on the ceiling portion. When engaging the nut portion with the male screw portions, it is not necessary to support the holding metal that holds the vehicle-side image display by hand, so the holding metal that holds the vehicle-side image display can be easily attached by one person to the mounting box installed on the ceiling portion in front of and above the driver's seat.

[0022] Also, after removing the nut portion engaged with the male screw portion, by simply relatively moving the male screw portion along the fastening hole to the screw insertion position, the claw portion or the receiving portion can be easily moved to the separation position with respect to the receiving portion or the claw portion. Therefore, with the claw portion or the receiving portion moved to the separation position, the holding metal for holding the vehicle side image display can be easily removed from the mounting box installed on the ceiling portion. Accordingly, the holding metal for holding the vehicle side image display can be securely and easily attached and detached to / from the mounting box installed on the ceiling portion in front of and above the driver's seat by one person.

[0023] (4) In the railway vehicle described in (3), The male screw portion is formed upward at the upper end portion of the holding metal, The front wall portion of the mounting box is characterized in that a working hole with a lid is formed so that a hand can be inserted into the mounting box to engage and disengage the nut portion with respect to the male screw portion.

[0024] In the present invention, since the male screw portion is formed upward at the upper end portion of the holding metal, and the front wall portion of the mounting box is formed with a working hole with a lid through which a hand can be inserted into the mounting box to engage and disengage the nut portion with respect to the male screw portion, in a working posture standing toward the front of the vehicle on the floor of the driver's cab, by inserting a hand through the working hole with the lid removed, the engaging operation of the nut portion with respect to the male screw portion can be easily performed. At that time, the electrical wiring of the vehicle side image display can be fixed to the wiring fixing bracket of the mounting box and the wiring work for connecting with the electrical wiring from the receiving facility can be performed. And after the above work, by closing the lid on the working hole, intrusion of foreign matters into the mounting box and damage to the electrical wiring can be prevented. Therefore, the attaching and detaching work of the holding metal for holding the vehicle side image display to / from the mounting box installed on the ceiling portion in front of and above the driver's seat can be performed more easily including the wiring work.

[0025] (5) In the railway vehicle according to any one of (1) to (4), The holding metal includes a side wall portion fastened to the side surface in the width direction of the vehicle side image display, A flange portion protruding inward in the width direction of the vehicle-side image display from the lower edge of the side wall portion is characterized in that a light shielding portion disposed below the vehicle-side image display is rotatably mounted in the vertical direction of the vehicle.

[0026] In the present invention, the retaining metal has a side wall portion fastened to the side surface in the width direction of the vehicle-side image display. On the flange portion protruding inward in the width direction of the vehicle-side image display from the lower edge of the side wall portion, a light shielding portion disposed below the vehicle-side image display is rotatably mounted in the vertical direction of the vehicle. Therefore, with respect to the retaining metal of the vehicle-side image display, while suppressing an increase in weight, the retaining function of the light shielding portion can be added. In addition, sunlight or the like entering the driver's field of view can be easily blocked or dimmed by the light shielding portion, and the vehicle-side image of the vehicle-side image display can be confirmed more accurately. Therefore, while enhancing the accuracy and convenience during safety confirmation of the vehicle-side image of the vehicle-side image display, with respect to the mounting box installed in the ceiling portion above the front of the driver's seat, the retaining metal that holds the vehicle-side image display and the light shielding portion can be securely and easily attached and detached by one person.

[0027] (6) In the railway vehicle according to any one of (1) to (5), the mounting box is formed of an aluminum plate material, and the retaining metal is formed of a stainless steel plate material, a spacer member is adhered near the fastening means to the upper end portion of the retaining metal, which is characterized in that.

[0028] In the present invention, since the mounting box is formed of an aluminum plate material, the mounting box can be further lightened, and the mounting box can be easily installed by one person on the ceiling portion above the front upper side of the driver's seat. Further, since the holding metal is formed of a stainless steel plate material, it is possible to increase the rigidity of the holding metal while reducing the weight, and the vehicle-side image display can be stably held by the lightened holding metal. Further, since a spacer member is adhered near the fastening means to the upper end portion of the holding metal, the mounting box and the holding metal are fastened via the spacer member, and even if heat distortion or the like due to welding occurs in the mounting box and the holding metal, the mounting box and the holding metal can be securely fastened without being affected by heat distortion or the like. As a result, the mounting box and the holding metal are lightened while avoiding problems such as heat distortion, and the burden of each mounting work can be reduced.

Effect of the Invention

[0029] According to the present invention, it is possible to provide a railway vehicle in which the suspension structure of the vehicle-side image display can be miniaturized and lightened, and the vehicle-side image display can be safely and easily detachably installed on the ceiling portion above the front upper side of the driver's seat by one person.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

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Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

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Figure 17

Figure 18

Mode for Carrying Out the Invention

[0031] <Configuration of the Present Railway Vehicle> Next, a railway vehicle according to an aspect of an embodiment of the present invention will be described in detail with reference to the drawings. Specifically, the configuration and operation effects of this railway vehicle will be described with reference to FIGS. 1 to 11. In addition, a method of fastening a retaining metal for holding a vehicle-side image display to a mounting box will be described with reference to FIGS. 12 to 14. FIG. 1 shows a schematic side view of a railway vehicle according to an aspect of an embodiment of the present invention. FIG. 2 shows a schematic partial cross-sectional view in the rail direction at portion A shown in FIG. 1. FIG. 3 shows a side view showing the mounting state of the suspension structure of the vehicle-side image display at portion B shown in FIG. 2. FIG. 4 shows an exploded perspective view of the suspension structure of the vehicle-side image display shown in FIG. 3. FIG. 5 shows an exploded perspective view of the mounting box and the retaining metal in the suspension structure shown in FIG. 4. FIG. 6 shows a front view of the retaining metal shown in FIG. 5. FIG. 7 shows a plan view of the retaining metal shown in FIG. 6. FIG. 8 shows a side view of the retaining metal shown in FIG. 6. FIG. 9 shows a front view of the mounting box shown in FIG. 4. FIG. 10 shows a D-D cross-sectional view shown in FIG. 9. FIG. 11 shows an E-E cross-sectional view shown in FIG. 9. FIG. 12 shows an explanatory view which is a C-C cross-sectional view shown in FIG. 3 and represents a state in the middle of lifting a retaining metal for holding a vehicle-side image display with respect to a mounting box. FIG. 13 is an explanatory view showing a state in which a male screw portion of the retaining metal is inserted into a screw insertion position of a fastening hole of the mounting box shown in FIG. 12, (A) shows an overall view, and (B) shows an enlarged view of portion F1 shown in (A). FIG. 14 is an explanatory view showing a state in which the male screw portion of the retaining metal is moved to a screw fastening position of a fastening hole of the mounting box shown in FIG. 13, (A) shows an overall view, and (B) shows an enlarged view of portion F2 shown in (A).

[0032] As shown in FIGS. 1 to 11, this railway vehicle 10 is a railway vehicle 10 in which a vehicle-side image display 1 for displaying a vehicle-side image obtained by photographing a vehicle side SS including a passenger-side door GT1 from the outside of the vehicle is installed at a ceiling portion 52 above the front of a driver's seat 51 via a suspension structure 2. In FIGS. 1 and 2, only one railway vehicle 10 having a driver's cab 5 at the front end (portion A) of the vehicle is shown, but a plurality of vehicles may be connected to the rear of this railway vehicle 10.

[0033] As shown in Fig. 1, the railway vehicle 10 includes a frame DW supported by a pair of front and rear bogies DS running on the rail RL, gable structures TK standing at the front and rear ends of the frame DW, side structures GK standing at both side ends of the frame DW, and a roof structure YK connected to the upper ends of the gable structures TK and the side structures GK. Further, on the side structure GK, side windows GM of various sizes, a passenger side door GT1 for passengers to get on and off, and a crew side door GT2 for drivers M and the like to get on and off are formed. Underfloor equipment KZ is installed on the frame DW. Also, as shown in Fig. 2, in the gable structure TK at the front end (A part) of the vehicle, a front window 53 large enough to ensure the forward visibility of the driver M sitting in the driver's seat 51 is formed up to the ceiling part 52.

[0034] In addition, at the station where the railway vehicle 10 stops, a camera is installed to photograph the vehicle side SS including the passenger side door GT1 from the outside of the vehicle so as to check the state of passengers getting on and off through the passenger side door GT1, and transmission equipment for transmitting the vehicle side image photographed by the camera is provided. The railway vehicle 10 is also equipped with receiving equipment for receiving the vehicle side image transmitted from the above transmission equipment. Then, as shown in Figs. 2 to 4 and Fig. 11, the vehicle side image display 1 installed on the ceiling part 52 above the front of the driver's seat 51 displays the vehicle side image sent from the above receiving equipment via the electrical wiring 54 on the monitor screen 11.

[0035] Also, as shown in Figs. 2 to 11, the suspension structure 2 of the vehicle side image display 1 includes a holding metal 3 for holding the vehicle side image display 1, and a mounting box 4 installed on the ceiling part 52 above the front of the driver's seat 51, which overlaps the holding metal 3 in the vertical direction and to which the holding metal 3 is detachably fastened. On the front surface side (driver's seat side) of the vehicle side image display 1, a plurality (two) of monitor screens 11 are arranged in parallel in the width direction, and on the back surface side (front window side) of the vehicle side image display 1, an electrical wiring 12 connected to the electrical wiring 54 of the receiving equipment is connected.

[0036] Further, the retaining member 3 includes a pair of side wall portions 3b, 3b fastened to the widthwise side surfaces 1b of the vehicle-side image display 1, and an upper end portion 3a horizontally connecting the upper end edges of both side wall portions 3b, 3b. The side wall portions 3b, 3b and the upper end portion 3a are formed by bending a single flat plate material into a substantially U-shaped cross section. Further, the mounting box 4 is formed as a hexahedral box body having a lower end portion 4c and an upper end portion 4a substantially the same size as the upper end portion 3a of the retaining member 3. Further, the upper end portion 3a of the retaining member 3 and the lower end portion 4c of the mounting box 4 are provided with locking means KS formed so as to be lockable in a state before fastening the retaining member 3 and the mounting box 4 at a position different from the fastening means TS for fastening the retaining member 3 and the mounting box 4.

[0037] That is, since the suspension structure 2 includes the retaining member 3 that holds the vehicle-side image display 1 and the mounting box 4 that is installed on the ceiling portion 52 and overlaps the retaining member 3 in the vertical direction and the retaining member 3 is detachably fastened, the suspension structure 2 of the vehicle-side image display 1 can be vertically divided into the retaining member 3 that holds the vehicle-side image display 1 and the mounting box 4 that can be installed on the ceiling portion 52 in advance. Further, since the retaining member 3 and the mounting box 4 overlap in the vertical direction, the planar occupation space of both can be reduced. Therefore, while the suspension structure 2 of the vehicle-side image display 1 is divided into two in the vertical direction, the divided retaining member 3 and mounting box 4 can be miniaturized and lightened respectively. Here, the retaining member 3 and the mounting box 4 are formed so as to substantially entirely overlap in the vertical direction, but it is not necessarily limited to this, and they may be formed so as to partially overlap in the vertical direction.

[0038] Further, locking means KS is formed at the upper end portion 3a of the holding metal 3 and the lower end portion 4c of the mounting box 4 so as to be lockable in a state before fastening the holding metal 3 and the mounting box 4 (here, a state where the male screw portion 31 is inserted into the screw fastening position of the fastening hole 41). Since it is provided at a position different from the fastening means TS for fastening the holding metal 3 and the mounting box 4, with respect to the mounting box 4 previously installed on the ceiling portion 52, at a position before fastening by the fastening means TS (here, a position where the male screw portion 31 protrudes upward from the fastening hole 41), the holding metal 3 for holding the side vehicle image display 1 is lifted up to the locking position of the locking means KS (here, a position where the claw portion 32 and the receiving portion 42 intersect in the vertical direction) and moved horizontally (in the left direction in the vehicle width direction in this embodiment), so that the holding metal 3 for holding the side vehicle image display 1 can be supported by the mounting box 4 via the locking means KS, and the fall can be prevented. Further, since the locking means KS is provided at a position different from the fastening means TS, the holding metal 3 and the mounting box 4 can be easily fastened by the fastening means TS without being obstructed by the locking means KS for supporting the holding metal 3. Therefore, the holding metal 3 for holding the side vehicle image display 1 can be fastened to the mounting box 4 previously installed on the ceiling portion 52 in front of the upper part of the driver's seat 51 safely and easily by one person.

[0039] Therefore, according to this railway vehicle 10, a railway vehicle 10 can be provided in which the suspension structure 2 of the side vehicle image display 1 can be miniaturized and lightened, and the side vehicle image display 1 can be installed on the ceiling portion 52 in front of the upper part of the driver's seat 51 safely and easily by one person.

[0040] Also, in this railway vehicle 10, as shown in FIGS. 4 to 11, the locking means KS includes a claw portion 32 formed so as to be insertable into either one of the upper end portion 3a of the holding metal 3 or the lower end portion 4c of the mounting box 4 toward the other side, and a receiving portion 42 formed on the other side. It is preferable that the claw portion 32 and the receiving portion 42 are formed so as to be locked in the vertical direction before fastening the holding metal 3 and the mounting box 4 and to be disengaged in the vertical direction after fastening.

[0041] Here, as shown in FIGS. 7 and 8, the upper end portion 3a of the holding metal 3 includes a pair of long side portions 3a1 formed in the vehicle width direction, a pair of short side portions 3a2 formed in the vehicle longitudinal direction, and a pair of connecting portions 3a3 formed parallel to the short side portions 3a2 near the center in the vehicle width direction between the long side portions 3a1. The long side portions 3a1, the short side portions 3a2, and the connecting portions 3a3 are connected in a ladder shape. A male screw portion 31 is erected upward at a corner portion 3a4 where the long side portion 3a1 and the short side portion 3a2 intersect at a right angle.

[0042] Also, as shown in FIGS. 9 to 11, the lower end portion 4c of the mounting box 4 includes a pair of long side portions 4c1 formed in the vehicle width direction, a pair of short side portions 4c2 formed in the vehicle longitudinal direction, and a pair of connecting portions 4c3 formed parallel to the short side portions 4c2 near the center in the vehicle width direction between the long side portions 4c1. The long side portions 4c1, the short side portions 4c2, and the connecting portions 4c3 are connected in a ladder shape. A long hole-shaped fastening hole 41 extending in the vehicle width direction is formed at a corner portion 4c4 where the long side portion 4c1 and the short side portion 4c2 intersect at a right angle. The fastening hole 41 is formed in an oval shape between a screw insertion position 411 for inserting the male screw portion 31 and a screw fastening position 412 for fastening the male screw portion 31. By engaging the nut portion 33 with the male screw portion 31 at the screw fastening position 412 of the fastening hole 41, the mounting box 4 and the holding metal 3 are fastened.

[0043] Also, as shown in FIGS. 4 to 11, the claw portion 32 is joined to the connecting portion 3a3 at the upper end portion 3a of the holding metal 3, and the receiving portion 42 is integrally formed on the connecting portion 4c3 at the lower end portion 4c of the mounting box 4. Further, the claw portion 32 includes a base end portion 323 joined to the lower surface of the upper end portion 3a (connecting portion 3a3) of the holding metal 3, a vertical wall portion 322 extending vertically from the base end portion 323, and a tip end portion 321 extending horizontally from the vertical wall portion 322. The base end portion 323, the vertical wall portion 322, and the tip end portion 321 are formed in a U-shaped cross section and extend in the vehicle longitudinal direction in the above cross section. Also, the length d1 of the claw portion 32 in the vehicle longitudinal direction is formed shorter than the length d2 of the receiving portion 42 in the vehicle longitudinal direction, and the tip end portion 321 and the vertical wall portion 322 of the claw portion 32 are formed so as to be insertable into the mounting box 4 through the gap between the long side portions 4c1 of the mounting box 4.

[0044] In addition, the height h1 of the claw portion 32 with respect to the upper end portion 3a of the holding metal 3 is formed to be lower than the height h2 of the male screw portion 31 with respect to the upper end portion 3a of the holding metal 3. Therefore, by inserting the male screw portion 31 into the screw insertion position 411 of the fastening hole 41, the tip portion 321 and the vertical wall portion 322 of the claw portion 32 can be easily inserted into the mounting box 4 from the gap between the long side portions 4c1 of the mounting box 4.

[0045] Also, at the locking position of the locking means KS, the receiving portion 42 is inserted into the gap of the claw portion 32 formed with a U-shaped cross section. Then, when the upper surface of the receiving portion 42 and the lower surface of the tip portion 321 of the claw portion 32 come into contact, the claw portion 32 and the receiving portion 42 are locked in the vertical direction. Note that an elastic sheet member 421 is attached to the upper surface of the receiving portion 42 to relieve the impact when contacting the tip portion 321 of the claw portion 32. Further, a reinforcing plate 47 is joined to the receiving portion 42 at a position that does not interfere with the tip portion 321 of the claw portion 32 to enhance rigidity. The reinforcing plate 47 extends in the vehicle longitudinal direction and is also joined to a pair of long side portions 4c1 formed in the vehicle width direction of the mounting box 4.

[0046] In this case, the locking means KS includes a claw portion 32 formed so as to be insertable into the lower end portion 4c side of the mounting box 4 at the upper end portion 3a of the holding metal 3, and a receiving portion 42 formed at the lower end portion 4c of the mounting box 4. The claw portion 32 and the receiving portion 42 are formed so as to be locked in the vertical direction before fastening the holding metal 3 and the mounting box 4 and to be disengaged in the vertical direction after fastening. Therefore, before fastening the holding metal 3 and the mounting box 4 by the fastening means TS, the mounting box 4 can support the holding metal 3 by the claw portion 32 and the receiving portion 42 being locked in the vertical direction.

[0047] Therefore, while confirming the locked state of the claw portion 32 and the receiving portion 42, the hand can be released from the holding metal 3 that holds the vehicle-side image display 1, and the holding metal 3 and the mounting box 4 can be fastened by the fastening means TS. As a result, the holding metal 3 of the vehicle-side image display 1 can be safely and easily fastened by one person to the mounting box 4 installed on the ceiling portion 52 in front of the driver's seat 51. Further, after the holding metal 3 of the vehicle-side image display 1 is fastened to the mounting box 4, the claw portion 32 and the receiving portion 42 are separated in the vertical direction, so that it is possible to avoid the claw portion 32 and the receiving portion 42 interfering with each other during the running of the vehicle and generating abnormal noises or the like.

[0048] Also, in this railway vehicle 10, the fastening means TS includes a plurality of male screw portions 31 that stand up to the other side on either the upper end portion 3a of the holding metal 3 or the lower end portion 4c of the mounting box 4, and a long-hole-shaped fastening hole 41 formed so that the male screw portion 31 can be relatively moved from the screw insertion position 411 to the screw fastening position 412 with the male screw portion 31 inserted through the other side. The claw portion 32 is preferably formed to move to the locking position with the receiving portion 42 as the male screw portion 31 relatively moves to the screw fastening position 412, and to move to the separated position from the receiving portion 42 as the male screw portion 31 relatively moves to the screw insertion position 411. In this case, the male screw portion 31 and the fastening hole 41, which are the fastening means TS, can also serve as locking guide means for guiding the claw portion 32, which is the locking means KS, to the locking position or the separated position with respect to the receiving portion 42.

[0049] That is, as shown in FIGS. 12 to 14, hold the holding metal 3 that holds the vehicle-side image display 1 by hand and lift it upward (in the direction of arrow P1), insert the male screw portion 31 into the fastening hole 41 at the screw insertion position 411, and move the male screw portion 31 relative to the fastening hole 41 along the long-hole-shaped fastening hole 41 to the screw fastening position 412 (move in the direction of arrow P2). Just by doing so, the claw portion 32 can be easily moved relative to the receiving portion 42 from the separated position to the locking position. At this locking position, the protruding amount h4 of the male screw portion 31 protruding upward from the fastening hole 41 is formed larger than the gap h3 between the tip portion 321 of the claw portion 32 and the receiving portion 42 to which the elastic sheet member 421 is attached. Therefore, when the hand is released from the holding metal 3 that holds the vehicle-side image display 1 in a state where the claw portion 32 has moved to the locking position with respect to the receiving portion 42, the holding metal 3 that holds the vehicle-side image display 1 slightly descends by the amount of the gap h3 until the claw portion 32 and the receiving portion 42 come into contact with each other in the vertical direction. However, in a state where the claw portion 32 and the receiving portion 42 come into contact with each other in the vertical direction and the two are locked, the holding metal 3 that holds the vehicle-side image display 1 is supported by the mounting box 4 installed on the ceiling portion 52 in front of the driver's seat 51 and above it.

[0050] Therefore, in a state where the claw portion 32 and the receiving portion 42 are locked, the nut portion 33 (see FIG. 6) can be engaged with the male screw portion 31 protruding upward from the fastening hole 41, and the holding metal 3 that holds the vehicle-side image display 1 can be fastened to the mounting box 4 installed on the ceiling portion 52. When engaging the nut portion 33 with the male screw portion 31, it is not necessary to support the holding metal 3 that holds the vehicle-side image display 1 by hand. Therefore, the holding metal 3 that holds the vehicle-side image display 1 can be easily attached by one person to the mounting box 4 installed on the ceiling portion 52 in front of the driver's seat 51 and above it.

[0051] Also, after removing the nut portion 33 engaged with the male screw portion 31, by simply moving the male screw portion 31 along the fastening hole 41 to the screw insertion position 411 relative to the fastening hole 41, the claw portion 32 can be easily moved to a separated position with respect to the receiving portion 42. Therefore, with the claw portion 32 moved to the separated position with respect to the receiving portion 42, the holding metal 3 that holds the vehicle-side image display 1 can be easily removed from the mounting box 4 installed on the ceiling portion 52. Accordingly, with respect to the mounting box 4 installed on the ceiling portion 52 in front of and above the driver's seat 51, the holding metal 3 that holds the vehicle-side image display 1 can be fastened in a manner that allows for safe and easy attachment and detachment by a single person.

[0052] Here, as the fastening means TS, a plurality (four) of male screw portions 31 that stand up from the upper end portion 3a of the holding metal 3 toward the lower end portion 4c side of the mounting box 4, and a plurality (four) of elongated hole-shaped fastening holes 41 formed in the lower end portion 4c of the mounting box 4 so as to be horizontally movable from the screw insertion position 411 to the screw fastening position 412 with the male screw portions 31 inserted therethrough are provided. The claw portion 32 formed at the upper end portion 3a of the holding metal 3 is formed to move to a locking position with respect to the receiving portion 42 formed at the lower end portion 4c of the mounting box 4 as the male screw portions 31 horizontally move to the screw fastening position 412, and to move to a separated position from the receiving portion 42 as the male screw portions 31 horizontally move to the screw insertion position 411.

[0053] Note that, as shown in FIGS. 10, 12 to 14, in the fastening hole 41, the separation distance d3 between the screw insertion position 411 and the screw fastening position 412 corresponds to the moving distance d3 for horizontally moving the claw portion 32 between the locking position and the separated position with respect to the receiving portion 42. Also, although the fastening hole 41 is formed in an elongated hole shape in the vehicle width direction, it is not necessarily limited to this. For example, it may be formed in an elongated hole shape in the vehicle longitudinal direction. In this case, the claw portion 32 and the receiving portion 42 need to be formed such that the receiving portion 42 is inserted into the gap of the claw portion 32 formed in a U-shaped cross section from the vehicle longitudinal direction.

[0054] Also, as shown in FIGS. 4, 5, 9, and 11, in this railway vehicle 10, the male screw portion 31 is formed upward at the upper end portion 3a of the holding metal 3, and on the front wall portion 4d of the mounting box 4, a working hole 44 with a lid body 43 is formed so that a hand can be inserted into the mounting box 4 to engage and disengage the nut portion 33 with respect to the male screw portion 31. The working hole 44 is preferably formed in a rectangular shape that is long in the vehicle width direction up to the vicinity of the fastening hole 41 for the male screw portion 31. The lid body 43 can be fastened by screws 431 or the like that engage with female screw portions formed on the back surface of the front wall portion 4d of the mounting box 4. Note that a substantially rectangular hollow portion surrounded by plate materials arranged along the outer peripheral edge is formed at the upper end portion 4a of the mounting box 4, and screw holes 45 for attaching the mounting box 4 to the ceiling portion 52 are formed at each corner portion of the upper end portion 4a. An opening hole 521 is formed in the ceiling portion 52 to allow the electrical wiring 54 from the receiving facility to be inserted into the mounting box 4 from the upper end portion 4a.

[0055] Thus, with a working posture standing forward in the vehicle on the floor of the driver's cab 5, the lid body 43 can be removed and a hand can be inserted through the working hole 44 to easily perform the engagement operation of the nut portion 33 with respect to the male screw portion 31. At that time, the electrical wiring 12 of the vehicle-side image display 1 can be fixed to the wiring fixing bracket 46 of the mounting box 4, and the wiring operation of connecting it to the electrical wiring 54 from the receiving facility can be performed. After the above operations, by closing the lid body 43 in the working hole 44, intrusion of foreign matter into the mounting box 4 and damage to the electrical wiring can be prevented. Therefore, the attachment and detachment operation of the vehicle-side image display 1 held by the holding metal 3 with respect to the mounting box 4 installed in the ceiling portion 52 in front of the upper side of the driver's seat 51 can be performed more easily, including the wiring operation.

[0056] Also, as shown in FIGS. 3 to 5 and FIG. 8, in this railway vehicle 10, the retaining bracket 3 is provided with a side wall portion 3b fastened to the widthwise side surface 1b of the vehicle-side image display 1. A flange portion 3c protruding inward in the width direction of the vehicle-side image display 1 from the lower end edge of the side wall portion 3b is preferably equipped with a light ray shielding portion 6 disposed below the vehicle-side image display 1 and pivotally mounted in the vehicle up-and-down direction. Here, mounting holes 3b1 and 3b2 are formed in both side wall portions 3b, 3b of the retaining bracket 3 so that the monitor screen 11 of the vehicle-side image display 1 can be arranged facing the direction of the driver M seated in the driver's seat 51. The light ray shielding portion 6 is mounted on the flange portion 3c via a torque hinge 61 having a horizontal rotation axis (in the vehicle width direction in this embodiment) so that it can be fixed at an arbitrary rotation angle.

[0057] Therefore, it is possible to add the holding function of the light ray shielding portion 6 to the retaining bracket 3 of the vehicle-side image display 1 while suppressing an increase in weight. In addition, sunlight or the like that enters the driver M's field of view can be easily blocked or dimmed by the light ray shielding portion 6, and the vehicle-side image of the vehicle-side image display 1 can be confirmed more accurately. Therefore, while enhancing the accuracy and convenience during safety confirmation of the vehicle-side image of the vehicle-side image display 1, the retaining bracket 3 that holds the vehicle-side image display 1 and the light ray shielding portion 6 can be securely and easily attached and detached to and from the mounting box 4 installed in the ceiling portion 52 in front of and above the driver's seat 51 even by one person.

[0058] As shown in FIGS. 3, 4, and 8, between the front upper edge portion 3b3 connected to the vehicle front end side of the upper end portion 3a and the front lower edge portion 3b4 connected to the vehicle front end side of the flange portion 3c on the side walls 3b, 3b of the holding metal 3, in order to reduce weight while avoiding the mounting holes 3b1, 3b2, a substantially C-shaped notch portion 3b5 is formed. Further, the front upper edge portion 3b3 and the front lower edge portion 3b4 formed on the side walls 3b, 3b are located in front of the vehicle from the vehicle side image display 1 and are formed linearly along the vertical line 3b6 in the vehicle up and down direction. As a result, after removing the holding metal 3 that holds the vehicle side image display 1 from the mounting box 4 or before attaching it to the mounting box 4, the front upper edge portion 3b3 and the front lower edge portion 3b4 can be used as legs to temporarily place it on the floor surface or the like while avoiding dirt, damage, etc. Therefore, the convenience of the attachment and detachment work of the holding metal 3 that holds the vehicle side image display 1 to the mounting box 4 can be further improved.

[0059] Also, in this railway vehicle 10, it is preferable that the mounting box 4 is formed of an aluminum plate material, the holding metal 3 is formed of a stainless steel plate material, and a spacer member 7 is adhered near the fastening means TS (male screw portion 31) for fastening to the mounting box 4 at the upper end portion 3a of the holding metal 3. Here, the aluminum plate material includes not only an aluminum-made plate material but also an aluminum alloy-made plate material. Further, for the spacer member 7, for example, a vinyl chloride sheet or the like can be applied. Note that a cushion member 8 that closes the gap between the upper end portion 3a of the holding metal 3 and the lower end portion 4c of the mounting box 4 is adhered to the driver's seat side of the upper end portion 3a of the holding metal 3.

[0060] As described above, since the mounting box 4 is formed of an aluminum plate material, the mounting box 4 can be further lightened, and the mounting box 4 can be easily installed alone on the ceiling portion 52 in front of the upper side of the driver's seat 51. Further, since the holding metal 3 is formed of a stainless steel plate material, the rigidity of the holding metal 3 can be increased while reducing the weight, and the vehicle-side image display 1 can be stably held by the weight-reduced holding metal 3. Further, since the spacer member 7 is adhered to the vicinity of the fastening means TS (male screw portion 31) at the upper end portion 3a of the holding metal 3, the mounting box 4 and the holding metal 3 are clamped and fastened by the spacer member 7. Even if thermal distortion or the like due to welding occurs in the mounting box 4 and the holding metal 3, the mounting box 4 and the holding metal 3 can be securely fastened without being affected by thermal distortion or the like. As a result, the mounting box 4 and the holding metal 3 can be lightened while avoiding problems such as thermal distortion, and the burden of each mounting operation can be reduced.

[0061] <Modification example> Note that the railway vehicle 10 can be changed into various forms without changing the gist of the present invention. For example, in the railway vehicle 10, the locking means KS includes a claw portion 32 formed at the upper end portion 3a of the holding metal 3 so as to be insertable into the lower end portion 4c side of the mounting box 4, and a receiving portion 42 formed at the lower end portion 4c of the mounting box 4. The claw portion 32 and the receiving portion 42 are formed so as to be locked in the vertical direction before the holding metal 3 and the mounting box 4 are fastened and to be disengaged in the vertical direction after the fastening. Further, at the locking position of the locking means KS, the receiving portion 42 is inserted into the gap of the claw portion 32 formed in a U-shaped cross section, and the upper surface of the receiving portion 42 and the lower surface of the tip portion 321 of the claw portion 32 are in contact with each other, whereby the claw portion 32 and the receiving portion 42 are locked in the vertical direction.

[0062] Further, as the fastening means TS, a plurality (four) of male screw portions 31 that stand up from the upper end portion 3a of the holding metal 3 toward the lower end portion 4c side of the mounting box 4, and a long hole-shaped fastening hole 41 formed in the lower end portion 4c of the mounting box 4 so as to be relatively movable with respect to the male screw portion 31 from the screw insertion position 411 to the screw fastening position 412 with the male screw portion 31 inserted therethrough are provided. The claw portion 32 formed at the upper end portion 3a of the holding metal 3 moves to the locking position with the receiving portion 42 formed at the lower end portion 4c of the mounting box 4 as the male screw portion 31 relatively moves to the screw fastening position 412, and moves to the separated position from the receiving portion 42 as the male screw portion 31 relatively moves to the screw insertion position 411. However, the locking means KS and the fastening means TS do not necessarily have to be limited to the above configuration.

[0063] (Modification 1) For example, as shown in FIG. 15, in the railway vehicle 10B, the locking means KS of the modification 1 includes a claw portion 42B formed at the lower end portion 4c of the mounting box 4B so as to be insertable toward the upper end portion 3a side of the holding metal 3B, and a receiving portion 32B formed at the upper end portion 3a of the holding metal 3B. The claw portion 42B and the receiving portion 32B may be formed so as to be locked in the vertical direction before the holding metal 3B and the mounting box 4B are fastened and to be disengaged in the vertical direction after the fastening. Here, the claw portion 42B includes a base end portion 423B joined to the upper surface of the lower end portion 4c of the mounting box 4B, a vertical wall portion 422B extending vertically from the base end portion 423B, and a tip end portion 421B extending horizontally from the vertical wall portion 422B. The base end portion 423B, the vertical wall portion 422B, and the tip end portion 421B are formed in a U-shaped cross section. Further, a reinforcing plate 37B is joined to the receiving portion 32B on the side opposite to the claw portion 42B. In this case, at the locking position of the locking means KS, the receiving portion 32B is inserted into the gap of the claw portion 42B formed in a U-shaped cross section, and the lower surface of the receiving portion 32B and the upper surface of the tip end portion 421B of the claw portion 42B come into contact with each other, whereby the claw portion 42B and the receiving portion 32B are locked in the vertical direction.

[0064] Further, in the fastening means TS of the first modification, the fastening means TS includes a plurality (four) of male screw portions 41B that stand up from the lower end portion 4c of the mounting box 4B toward the upper end portion 3a of the holding metal 3B, and a long hole-shaped fastening hole 31B that is formed to be relatively movable with respect to the male screw portion 41B from a screw insertion position 311B to a screw fastening position 312B with the male screw portion 41B inserted through the upper end portion 3a of the holding metal 3B. The receiving portion 32B formed at the upper end portion 3a of the holding metal 3B moves to a locking position with the claw portion 42B formed at the lower end portion 4c of the mounting box 4B as the male screw portion 41B relatively moves to the screw fastening position 312B, and may be formed to move to a separated position from the claw portion 42B as the male screw portion 41B relatively moves to the screw insertion position 311B. In this case, the mounting box 4B and the holding metal 3B can be fastened by engaging the nut portion 43B with the male screw portion 41B through the gap between the upper end portion 3a of the holding metal 3B and the vehicle-side image display 1.

[0065] (Second modification) Further, for example, as shown in FIG. 16, in the railway vehicle 10C, the locking means KS of the second modification includes a claw portion 32C formed at the upper end portion 3a of the holding metal 3C so as to be insertable into the lower end portion 4c side of the mounting box 4C, and a receiving portion 42 formed at the lower end portion 4c of the mounting box 4C. The claw portion 32C and the receiving portion 42 may be formed to be locked in the vertical direction before the holding metal 3C and the mounting box 4C are fastened and to be disengaged in the vertical direction after the fastening. Here, the claw portion 32C is formed such that the tip portion 321C, the upper end of which is inclined toward the receiving portion 42, is swingable in the vertical direction (the direction of arrow R) about a hinge shaft portion 322C supported by the upper end portion 3a of the holding metal 3C, and the tip portion 321C is biased in the direction of locking with the receiving portion 42 via a spring member 323C.

[0066] Also, as the fastening means TS in Modification 2, it may include a plurality (four) of male screw portions 31 that stand up from the upper end portion 3a of the holding metal 3C toward the lower end portion 4c side of the mounting box 4C, and a circular hole-shaped fastening hole 41C formed in the lower end portion 4c of the mounting box 4C so that the male screw portion 31 can be inserted therethrough. The claw portion 32C formed at the upper end portion 3a of the holding metal 3C is configured such that as the male screw portion 31 is inserted into the fastening hole 41C, the inclined surface of the tip portion 321C abuts against the receiving portion 42, and after the tip portion 321C rotates to the opposite side with respect to the receiving portion 42, it is formed to return to the locking position with the receiving portion 42 by the biasing force of the spring member 323C.

[0067] Note that the hinge shaft portion 322C preferably has a stop function of stopping the claw portion 32C at the separated position when the claw portion 32C is rotated from the locking position with the receiving portion 42 to the separated position, and the stop function is released when the claw portion 32C is rotated further, and the claw portion 32C is formed to return to the locking position. In this case, in a state where the claw portion 32C is in the locking position with the receiving portion 42, after removing the nut portion 33 from the male screw portion 31, the claw portion 32C is rotated to the separated position and stopped, so that the holding metal 3C that holds the vehicle-side image display 1 from the mounting box 4C can be easily removed by one person.

[0068] <Function and Effect> As described in detail above, according to the railway vehicles 10, 10B, 10C according to the present embodiment, the suspension structure 2 includes holding metals 3, 3B, 3C that hold the vehicle-side image display 1, and mounting boxes 4, 4B, 4C that are installed on the ceiling portion 52 and overlap the holding metals 3, 3B, 3C in the vertical direction and the holding metals 3, 3B, 3C are detachably fastened. At the upper end portion 3a of the holding metals 3, 3B, 3C and the lower end portion 4c of the mounting boxes 4, 4B, 4C, locking means KS is formed so as to be lockable in a state before fastening the holding metals 3, 3B, 3C and the mounting boxes 4, 4B, 4C, and is provided at a position different from the fastening means TS for fastening the holding metals 3, 3B, 3C and the mounting boxes 4, 4B, 4C. Therefore, the suspension structure 2 of the vehicle-side image display 1 can be miniaturized and lightened, and the vehicle-side image display 1 can be safely and easily detachably installed on the ceiling portion 52 in front of the upper side of the driver's seat 51 even by one person.

[0069] That is, the suspension structure 2 includes holding members 3, 3B, 3C that hold the vehicle-side image display 1, and mounting boxes 4, 4B, 4C that are installed on the ceiling portion 52 and overlap the holding members 3, 3B, 3C in the vertical direction and to which the holding members 3, 3B, 3C are detachably fastened. Therefore, the suspension structure 2 of the vehicle-side image display 1 can be divided in the vertical direction into the holding members 3, 3B, 3C that hold the vehicle-side image display 1 and the mounting boxes 4, 4B, 4C that can be installed on the ceiling portion 52 in advance. Further, since the holding members 3, 3B, 3C and the mounting boxes 4, 4B, 4C overlap in the vertical direction, the planar occupation space of both can be reduced. Therefore, while dividing the suspension structure 2 of the vehicle-side image display 1 into two in the vertical direction, the divided holding members 3, 3B, 3C and mounting boxes 4, 4B, 4C can be miniaturized and lightened respectively.

[0070] In addition, locking means KS is formed at the upper end portions 3a of the holding members 3, 3B, 3C and the lower end portions 4c of the mounting boxes 4, 4B, 4C so as to be lockable in the state before fastening the holding members 3, 3B, 3C and the mounting boxes 4, 4B, 4C. Since it is provided at a position different from the fastening means TS for fastening the holding members 3, 3B, 3C and the mounting boxes 4, 4B, 4C, with respect to the mounting boxes 4, 4B, 4C pre-installed on the ceiling portion 52, by lifting the holding members 3, 3B, 3C that hold the vehicle-side image display 1 to the locking position of the locking means KS at the position before fastening by the fastening means TS, the holding members 3, 3B, 3C that hold the vehicle-side image display 1 can be supported by the mounting boxes 4, 4B, 4C via the locking means KS, and the fall can be prevented. Further, since the locking means KS is provided at a position different from the fastening means TS, the holding members 3, 3B, 3C and the mounting boxes 4, 4B, 4C can be easily fastened by the fastening means TS without being obstructed by the locking means KS that supports the holding members 3, 3B, 3C. Therefore, with respect to the mounting boxes 4, 4B, 4C pre-installed on the ceiling portion 52 in front of and above the driver's seat 51, the holding members 3, 3B, 3C that hold the vehicle-side image display 1 can be safely and easily detachably fastened even by one person.

[0071] Therefore, according to the present embodiment, it is possible to miniaturize and lighten the suspension structure 2 of the vehicle-side image display 1, and provide railway vehicles 10, 10B, and 10C that can install the vehicle-side image display 1 safely and easily by one person on the ceiling portion 52 above the front of the driver's seat 51.

[0072] Further, according to the present embodiment, the locking means KS includes claw portions 32, 42B, 32C formed so as to be insertable into either the upper end portion 3a of the retaining metals 3, 3B, 3C or the lower end portion 4c of the mounting boxes 4, 4B, 4C toward the other side, and receiving portions 42, 32B formed on the other side. The claw portions 32, 42B, 32C and the receiving portions 42, 32B are formed so as to be locked in the vertical direction before the fastening of the retaining metals 3, 3B, 3C and the mounting boxes 4, 4B, 4C, and to be disengaged in the vertical direction after the fastening. Therefore, before the retaining metals 3, 3B, 3C and the mounting boxes 4, 4B, 4C are fastened by the fastening means TS, the mounting boxes 4, 4B, 4C can support the retaining metals 3, 3B, 3C by the claw portions 32, 42B, 32C and the receiving portions 42, 32B being locked in the vertical direction.

[0073] Therefore, while confirming the state in which the claw portions 32, 42B, 32C and the receiving portions 42, 32B are locked, the hands can be released from the retaining metals 3, 3B, 3C that hold the vehicle-side image display 1, and the retaining metals 3, 3B, 3C and the mounting boxes 4, 4B, 4C can be fastened by the fastening means TS. As a result, the retaining metals 3, 3B, 3C of the vehicle-side image display 1 can be safely and easily fastened to the mounting boxes 4, 4B, 4C installed on the ceiling portion 52 above the front of the driver's seat 51 by one person. Further, after the retaining metals 3, 3B, 3C of the vehicle-side image display 1 are fastened to the mounting boxes 4, 4B, 4C, the claw portions 32, 42B, 32C and the receiving portions 42, 32B are disengaged in the vertical direction, so that it is possible to avoid the claw portions 32, 42B, 32C and the receiving portions 42, 32B interfering with each other during the running of the vehicle and generating abnormal noises or the like.

[0074] Further, according to the present embodiment, the fastening means TS includes a plurality of male screw portions 31, 41B that stand upright to the other side on either the upper end portion 3a of the holding pieces 3, 3B or the lower end portion 4c of the mounting boxes 4, 4B, and the male screw portions 31, 41B are inserted through the other side, and elongated hole-shaped fastening holes 41, 31B are formed so as to be relatively movable with respect to the male screw portions 31, 41B from the screw insertion positions 411, 311B to the screw fastening positions 412, 312B. The claw portion 32 or the receiving portion 32B moves to the locking position with the receiving portion 42 or the claw portion 42B as the male screw portions 31, 41B relatively move from the screw insertion positions 411, 311B to the screw fastening positions 412, 312B, and moves to the separation position from the receiving portion 42 or the claw portion 42B as the male screw portions 31, 41B relatively move from the screw fastening positions 412, 312B to the screw insertion positions 411, 311B. Therefore, the male screw portions 31, 41B and the fastening holes 41, 31B, which are the fastening means TS, can also serve as locking guide means for guiding the claw portion 32 or the receiving portion 32B to the locking position or the separation position.

[0075] That is, by holding the holding pieces 3, 3B that hold the vehicle-side image display 1 by hand, inserting the male screw portions 31, 41B into the fastening holes 41, 31B at the screw insertion positions 411, 311B, and relatively moving the male screw portions 31, 41B along the elongated hole-shaped fastening holes 41, 31B to the screw fastening positions 412, 312B, the claw portion 32 or the receiving portion 32B can be easily moved to the locking position with respect to the receiving portion 42 or the claw portion 42B. Then, when the hand is released from the holding pieces 3, 3B that hold the vehicle-side image display 1 with the claw portion 32 or the receiving portion 32B in the locked position, the holding pieces 3, 3B that hold the vehicle-side image display 1 descend by their own weight until the claw portions 32, 42B and the receiving portions 42, 32B are locked in the vertical direction, but are supported by the mounting boxes 4, 4B in the state where the claw portions 32, 42B and the receiving portions 42, 32B are locked.

[0076] Therefore, with the claw portions 32, 42B and the receiving portions 42, 32B locked, the nuts 33, 43B can be engaged with the male screw portions 31, 41B to fasten the retaining brackets 3, 3B that hold the vehicle-side image display 1 to the mounting boxes 4, 4B installed on the ceiling portion 52. When engaging the nuts 33, 43B with the male screw portions 31, 41B, there is no need to support the retaining brackets 3, 3B that hold the vehicle-side image display 1 by hand. Thus, the retaining brackets 3, 3B that hold the vehicle-side image display 1 can be easily attached by one person to the mounting boxes 4, 4B installed on the ceiling portion 52 in the front upper part of the driver's seat 51.

[0077] Also, after removing the nuts 33, 43B engaged with the male screw portions 31, 41B, by simply moving the male screw portions 31, 41B along the fastening holes 41, 31B to the screw insertion positions 411, 311B, the claw portion 32 or the receiving portion 32B can be easily moved to the separated position relative to the receiving portion 42 or the claw portion 42B. Therefore, with the claw portion 32 or the receiving portion 32B in the moved separated position, the retaining brackets 3, 3B that hold the vehicle-side image display 1 can be easily removed from the mounting boxes 4, 4B installed on the ceiling portion 52. Thus, the retaining brackets 3, 3B that hold the vehicle-side image display 1 can be securely and easily fastened to be detachable by one person to the mounting boxes 4, 4B installed on the ceiling portion 52 in the front upper part of the driver's seat 51.

[0078] Also, according to the present embodiment, the male screw portion 31 is formed upward at the upper end portions 3a of the holding metals 3 and 3C, and on the front wall portions 4d of the mounting boxes 4 and 4C, there are formed working holes 44 with a lid body 43 through which a hand can be inserted into the mounting boxes 4 and 4C to engage and disengage the nut portion 33 with respect to the male screw portion 31. Therefore, in a working posture standing forward in the vehicle direction on the floor of the driver's cab 5, a hand can be inserted through the working hole 44 with the lid body 43 removed, and the engaging and disengaging operation of the nut portion 33 with respect to the male screw portion 31 can be easily performed. At that time, the electrical wiring 12 of the vehicle-side image display 1 can be fixed to the wiring fixing brackets 46 of the mounting boxes 4 and 4C, and the wiring work of connecting with the electrical wiring 54 from the receiving equipment can be carried out. And after the above work, by closing the lid body 43 in the working hole 44, the intrusion of foreign matters into the mounting boxes 4 and 4C and the damage of the electrical wiring can be prevented. Therefore, the attaching and detaching work of the holding metals 3 and 3C that hold the vehicle-side image display 1 with respect to the mounting boxes 4 and 4C installed on the ceiling portion 52 in front of and above the driver's seat 51 can be carried out more easily including the wiring work.

[0079] Also, according to the present embodiment, the holding metals 3, 3B, and 3C are provided with side wall portions 3b that are fastened to the side surfaces 1b in the width direction of the vehicle-side image display 1. On the flange portion 3c that protrudes inward in the width direction of the vehicle-side image display 1 from the lower end edge of the side wall portion 3b, the light shielding portion 6 disposed below the vehicle-side image display 1 is rotatably mounted in the vehicle vertical direction. Therefore, with respect to the holding metals 3, 3B, and 3C of the vehicle-side image display 1, while suppressing an increase in weight, the holding function of the light shielding portion 6 can be added. In addition, sunlight or the like that enters the driver M's field of view can be easily blocked or dimmed by the light shielding portion 6, and the vehicle-side image of the vehicle-side image display 1 can be confirmed more accurately. Therefore, while enhancing the accuracy and convenience during the safety confirmation of the vehicle-side image of the vehicle-side image display 1, with respect to the mounting boxes 4, 4B, and 4C installed on the ceiling portion 52 in front of and above the driver's seat 51, the holding metals 3, 3B, and 3C that hold the vehicle-side image display 1 and the light shielding portion 6 can be fastened to be detachably attached and detached safely and easily even by one person.

[0080] Also, according to the present embodiment, since the mounting boxes 4, 4B, and 4C are formed of aluminum plate materials, the mounting boxes 4, 4B, and 4C can be further lightened, and the mounting boxes 4, 4B, and 4C can be easily installed by one person on the ceiling portion 52 in the upper front of the driver's seat 51. Further, since the holding members 3, 3B, and 3C are formed of stainless steel plate materials, the rigidity of the holding members 3, 3B, and 3C can be increased while reducing the weight, and the vehicle-side image display 1 can be stably held by the lightened holding members 3, 3B, and 3C. Further, since the spacer member 7 is adhered near the fastening means TS (male screw portion 31) to the upper end portions 3a of the holding members 3, 3B, and 3C, the mounting boxes 4, 4B, and 4C and the holding members 3, 3B, and 3C are clamped and fastened by the spacer member 7, and even if thermal distortion or the like due to welding occurs in the mounting boxes 4, 4B, and 4C and the holding members 3, 3B, and 3C, the mounting boxes 4, 4B, and 4C and the holding members 3, 3B, and 3C can be surely fastened without being affected by thermal distortion or the like. As a result, the mounting boxes 4, 4B, and 4C and the holding members 3, 3B, and 3C can be lightened while avoiding problems such as thermal distortion, and the burden of each mounting work can be reduced.

Industrial Applicability

[0081] The present invention can be used as a railway vehicle in which a vehicle-side image display for displaying a vehicle-side image obtained by photographing a vehicle side including a passenger-side door from the outside of the vehicle is installed on a ceiling portion in the upper front of a driver's seat.

Explanation of Signs

[0082] 1 Vehicle-side image display 1b Side surface in the width direction 2 Suspension structure 3, 3B, 3C Holding members 3a Upper end portion 3b Side wall portion 3c Flange portion 4, 4B, 4C Mounting boxes 4c Lower end portion 4d Front wall portion 6 Light ray shielding portion 7 Spacer member 10, 10B, 10C Railway vehicles 31, 41B Male screw portions 32, 32C, 42B Claw portions 41, 31B fastening hole 42, 32B receiving part 51 driver's seat 52 ceiling part 411, 311B screw insertion position 412, 312B screw fastening position GT1 passenger side door KS locking means SS vehicle side surface TS fastening means

Claims

1. A railway vehicle in which a vehicle side image display for displaying a vehicle side image obtained by photographing a vehicle side including a passenger side door from the outside of the vehicle is installed on a ceiling portion above the front of the driver's seat via a suspension structure, wherein the suspension structure includes a holding metal for holding the vehicle side image display and a mounting box installed on the ceiling portion and overlapping the holding metal in the vertical direction, and the holding metal is detachably fastened to the mounting box, wherein locking means formed so as to be lockable in a state before fastening the holding metal and the mounting box is provided at positions different from fastening means for fastening the holding metal and the mounting box at the upper end portion of the holding metal and the lower end portion of the mounting box. A railway vehicle characterized by that.

2. In the railway vehicle according to claim 1, the locking means includes a claw portion formed on either one of the upper end portion of the holding metal or the lower end portion of the mounting box so as to be insertable into the other side, and a receiving portion formed on the other side, wherein the claw portion and the receiving portion are formed so as to be locked in the vertical direction before fastening the holding metal and the mounting box and to be disengaged in the vertical direction after fastening. A railway vehicle characterized by that.

3. In the railway vehicle according to claim 2, the fastening means includes a plurality of male screw portions standing on either one of the upper end portion of the holding metal or the lower end portion of the mounting box toward the other side, and a long hole-shaped fastening hole formed so as to be horizontally movable from a screw insertion position to a screw fastening position with the male screw portion inserted therethrough on the other side, wherein the claw portion moves to a locking position with the receiving portion as the male screw portion horizontally moves from the screw insertion position to the screw fastening position, and moves to a separation position from the receiving portion as the male screw portion horizontally moves from the screw fastening position to the screw insertion position. A railway vehicle characterized by that.

4. In the railway vehicle according to claim 3, the male screw portion is formed upward at the upper end portion of the holding metal, wherein a working hole with a lid for inserting a hand into the mounting box to perform an engaging and disengaging operation of a nut portion with respect to the male screw portion is formed on the front wall portion of the mounting box. A railway vehicle characterized by that.

5. In the railway vehicle according to any one of claims 1 to 4, the holding metal includes a side wall portion fastened to a side surface in the width direction of the vehicle side image display, wherein a light shielding portion disposed below the vehicle side image display is rotatably mounted in the vertical direction of the vehicle on a flange portion protruding inward in the width direction of the vehicle side image display from the lower end edge of the side wall portion. A railway vehicle characterized by that.

6. In the railway vehicle according to claim 1, the mounting box is formed of an aluminum plate material, and the holding metal is formed of a stainless steel plate material; A railway vehicle, characterized in that a spacer member is adhered near the fastening means to the upper end of the holding metal.

Images