Disaster prevention vehicles

Abstract

To provide a disaster prevention vehicle capable of fully opening even if the opening / closing space of a door on the outside or inside of the vehicle is small by suppressing the restriction of a design layout around the door for opening / closing a vehicle side wall opening.SOLUTION: A disaster prevention vehicle includes a folding-door main body 40 having a first folding-door divided body 41 and a second folding-door divided body 42, and a folding-door opening / closing mechanism 60. The first folding-door divided body 41 has a first outer surface 41b on the outer side of the vehicle and a first inner surface 41c on the inner side of the vehicle at the closed position of the folding-door main body 40. The second folding-door divided body 42 has a second outer surface 42b on the outer side of the vehicle and a second inner surface 42c on the inner side of the vehicle at the closed position of the folding-door main body 40. The folding-door opening / closing mechanism 60 is configured to open an opening 32 by folding the folding-door main body 40 such that the first inner surface 41c of the first folding-door divided body 41 and the second inner surface 42c of the second folding-door divided body 42 face each other, and the first outer surface 41b of the first folding-door divided body 41 and the outer surface of the vehicle-side wall 31 face each other.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a disaster prevention vehicle equipped with equipment necessary for rescue operations and firefighting operations. [Background technology]

[0002] Conventionally, disaster prevention vehicles equipped with the necessary equipment for rescue and firefighting activities have been used in the event of a natural disaster such as a fire, accident, or earthquake (see, for example, Patent Document 1). The disaster prevention vehicle of Patent Document 1 has a front cabin with a driver's seat and a rear cabin that serves as a waiting room for rescue workers, and rescue workers can travel between the two. In addition, this disaster prevention vehicle has doors on the side walls of the front and rear cabins for rescue workers to board and disembark. The rear cabin door is a wide, single piece that makes it easy for rescue workers to board and disembark. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-3976 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the wide, single-piece rear cabin door described in Patent Document 1, when configured as a sliding door, has the problem of interfering with the front cabin door located in front of the vehicle's opening when in the open position, or with the door of an equipment storage bay located rearward of the opening when in the open position. This limits the design layout around the rear cabin door. Furthermore, when the rear cabin door is hinged and opens outward, the tip of the door's rotation protrudes significantly outside the vehicle, preventing the door from being fully opened if there is a wall near the outside of the vehicle. Furthermore, when the rear cabin door is hinged and opens inward, the design layout of the interior of the rear cabin is limited in order to prevent the large opening and closing movement of the door from interfering with the equipment.

[0005] The present invention has been made in consideration of these points, and its purpose is to provide a disaster prevention vehicle that can be fully opened even if there is little space outside or inside the vehicle for opening and closing the door, by minimizing restrictions on the design layout around the door that opens and closes the opening in the side wall of the vehicle. [Means for solving the problem]

[0006] The present invention provides a means for solving the above-mentioned problems as follows: That is, a first invention is a disaster prevention vehicle equipped with a folding door main body that opens and closes a rectangular opening provided in a side wall of the vehicle, and a folding door opening / closing mechanism that folds the folding door main body to open the opening, wherein the folding door main body has a first folding door division attached to a peripheral wall that forms the opening by a first hinge portion about a vertical axis, and a second folding door division attached to a pivot tip end of the first folding door division about a vertical axis by a second hinge portion, and the first folding door division is attached to the folding door main body by a first hinge portion about a vertical axis. the folding door main body has a first outer surface that faces the outside of the vehicle in the closed position and a first inner surface that faces the inside of the vehicle, the second folding door partition has a second outer surface that faces the outside of the vehicle in the closed position of the folding door main body and a second inner surface that faces the inside of the vehicle, and the folding door opening / closing mechanism is configured to open the opening by folding the folding door main body so that the first inner surface of the first folding door partition faces the second inner surface of the second folding door partition and so that the first outer surface of the first folding door partition faces the outer surface of the vehicle side wall.

[0007] The first invention relates to a folding door main body for opening and closing an opening in a vehicle sidewall of a disaster prevention vehicle. The folding door main body is not a single-piece door as in the past, but is a folding door type having a first folding door segment and a second folding door segment. The first invention is configured to open the opening by folding the folding door main body so that the first inner surface of the first folding door segment faces the second inner surface of the second folding door segment and the first outer surface of the first folding door segment faces the outer surface of the vehicle sidewall. For example, when the folding door main body of the present invention is used as a door for opening and closing an opening in a rear cabin, the opening can be fully opened without the folding door main body protruding significantly forward or rearward from the opening, compared to a sliding single-piece door. This prevents the folding door main body from interfering with the front cabin door located forward of the rear cabin opening or the door of an equipment storage bay located rearward of the rear cabin door, thereby minimizing limitations on the design layout around the folding door main body.

[0008] Furthermore, the folding door body of the first invention is an outward-opening type, and the opening is opened and closed by a first folding door segment that rotates about a vertical axis by a first hinge portion relative to the peripheral wall that forms the opening, and a second folding door segment that rotates about a vertical axis by a second hinge portion relative to the rotation tip of the first folding door segment, so that compared to a single door, the folding door body does not protrude significantly outside or inside the vehicle when moving from the closed position to the open position. This makes it possible to provide a disaster prevention vehicle in which the folding door body can be fully opened even if there is little space outside or inside the vehicle for opening and closing the folding door body.

[0009] The second invention is characterized in that, in the first invention, the second folding door partition is formed with a larger horizontal width than the first folding door partition, and a handle portion is provided on the second inner surface of the second folding door partition, extending to the pivot tip of the second folding door partition.

[0010] According to the second aspect of the present invention, when the first inner surface of the first folding door segment and the second inner surface of the second folding door segment are opposed to each other and the first outer surface of the first folding door segment is opposed to the outer surface of the vehicle sidewall to open the opening, the second inner surface of the second folding door segment can be entirely uncovered by the first inner surface of the first folding door segment. That is, when the folding door segment is viewed in the open position from inside the vehicle, the pivot tip of the second inner surface of the second folding door segment can be exposed. And, by providing a handle portion on this exposed portion, the folding door segment can be easily moved by holding the handle portion of the second folding door segment when moving the folding door segment from the open position to the closed position.

[0011] The third invention is characterized in that, in the first or second invention, the folding door opening and closing mechanism has a mounting base that is located inside the vehicle further from the opening and near the horizontal portion of the rectangular peripheral wall that forms the opening, a fixed arm member that is located at the upper and lower ends of the second folding door partition so as to protrude toward the inside of the vehicle, and a movable arm member that has one end connected to the tip of the fixed arm member so as to be freely rotatable around a vertical axis and the other end connected to the mounting base so as to be freely rotatable around a vertical axis.

[0012] According to the third invention, when the folding door main body is moved to the open position or the closed position, the movable arm member moves in an arc centered on the mounting base, and therefore the tip of the fixed arm member connected to one end of the movable arm member moves in an arc centered on the mounting base. This limits the rotation range of the rotation tip of the second folding door division, so the folding door main body can be moved smoothly to the open position or the closed position without the rotation tip of the second folding door division protruding significantly outside the vehicle.

[0013] The fourth invention is characterized in that, in the third invention, a room is formed inside the vehicle from the opening, and the folding door opening / closing mechanism provided below the folding door main body is configured so that the fixed arm member and the movable arm member are hidden below the floor of the room when the folding door main body is in the closed position.

[0014] According to the fourth aspect of the present invention, even though the fixed arm member and the movable arm member protrude further toward the inside of the vehicle than the second folding door partition of the folding door main body, it is possible to prevent the personnel and equipment inside the room from interfering with the fixed arm member and the movable arm member. This makes it possible to secure space for personnel to work and space for storing equipment inside the vehicle. It is also possible to prevent the personnel's feet from getting caught in the fixed arm member and the movable arm member.

[0015] The fifth invention is characterized in that, in the third or fourth invention, the movable arm member is set to be equal in length to the virtual arm member that linearly connects the hinge axis of the first hinge section and the hinge axis of the second hinge section when the folding door main body and the folding door opening / closing mechanism are viewed in a plane, and the fixed arm member is set to a length that makes the movable arm member and the virtual arm member parallel to each other.

[0016] According to the fifth aspect of the present invention, a four-bar link mechanism can be formed by the movable arm member, the virtual arm member, and the portion connecting both ends thereof. This allows the folding door body to be moved to the open position or the closed position while keeping the second outer surface of the second folding door division parallel to the outer surface of the vehicle side wall. This allows the folding door body to be moved smoothly to the open position or the closed position without the entire second folding door division significantly protruding outward from the vehicle. [Effects of the Invention]

[0017] According to the disaster prevention vehicle of the present invention, the opening in the vehicle side wall can be fully opened without the folding door body protruding significantly toward the front or rear of the vehicle. This prevents the folding door body from interfering with the door of the front cabin, which is located further forward than the opening of the rear cabin, or with the door of the equipment storage shed, which is located further rearward than the opening of the rear cabin, thereby minimizing limitations on the design layout around the folding door body. Furthermore, the folding door body can be prevented from protruding significantly toward the outside or inside of the vehicle when operating the folding door body to the closed or open position. This makes it possible to provide a disaster prevention vehicle that can fully open the folding door body even if there is little space outside or inside the vehicle for opening and closing the folding door body. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a side view of a disaster prevention vehicle according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view of the disaster prevention vehicle with the folding door body in the open position from FIG. [Figure 3] This is a front view of the folding door body as seen from the side of the vehicle. [Figure 4] FIG. [Figure 5] 1A and 1B are side views showing folding door segments, in which (a) is a left side view of a first folding door segment, and (b) is a cross-sectional right side view of a second folding door segment. [Figure 6] 10 is a plan view of the folding door body and the folding door opening / closing mechanism when the folding door body is in a closed position. FIG. [Figure 7] 10 is a plan view of the folding door body and the folding door opening / closing mechanism when the folding door body is in the middle of opening or closing. FIG. [Figure 8] 1 is a plan view of the folding door body and the folding door opening / closing mechanism when the folding door body is in the open position. FIG. [Figure 9] 10 is a side view showing the folding door opening and closing mechanisms provided above and below the folding door main body. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, a disaster prevention vehicle according to an embodiment of the present invention will be described with reference to the drawings.

[0020] 1 shows a disaster prevention vehicle 1 according to one embodiment of the present invention. The disaster prevention vehicle 1 of this embodiment is equipped with equipment necessary for rescue and firefighting activities, and is a vehicle that rushes to the scene when a natural disaster such as a fire, accident, or earthquake occurs. The disaster prevention vehicle 1 is equipped with a front cabin 2 that includes a driver's seat, a rear cabin 3 that serves as a waiting room for rescue workers, and a loading bay 4 that is provided behind the rear cabin 3 and that stores various equipment.

[0021] A front door 2a is provided on the vehicle side wall of the front cabin 2. A rectangular opening 32 is provided on the vehicle side wall 31 of the rear cabin 3, and this opening 32 is opened and closed by a folding door main body 40. In FIG. 1, the folding door main body 40 is in the closed position. FIG. 2 shows a side view of the disaster prevention vehicle 1 with the folding door main body 40 in the open position. In this way, the folding door main body 40 is set to the open position by folding toward the front of the vehicle relative to the opening 32. A room 34 in which seats for rescue workers are provided is formed inside the vehicle from the opening 32. An equipment storage door 35 that can rotate up and down around its lower end is provided below the folding door main body 40 to enable access to storage areas for various equipment such as winches (see FIG. 9).

[0022] Fig. 3 is a front view of the folding door main body 40 as seen from the side of the vehicle, and Fig. 4 is a rear view of the folding door main body 40. As shown in Figs. 1 to 4, the folding door main body 40 has a first folding door segment 41 attached to the peripheral wall 33 that forms the opening 32 by a first hinge portion 46 so as to be rotatable about a vertical axis, and a second folding door segment 42 attached to the pivot tip of the first folding door segment 41 by a second hinge portion 47 so as to be rotatable about a vertical axis. The first folding door segment 41 has a first window portion 41a at its upper portion. The first folding door segment 41 has a first outer surface 41b that faces the outside of the vehicle when the folding door main body 40 is in the closed position, and a first inner surface 41c that faces the inside of the vehicle. The second folding door segment 42 has a second window portion 42a at its upper portion. The second folding door divided body 42 has a second outer surface 42b that faces the outside of the vehicle when the folding door main body 40 is in the closed position, and a second inner surface 42c that faces the inside of the vehicle.

[0023] 5, (a) shows a left side view of the first folding door segment 41, and (b) shows a cross-sectional right side view of the second folding door segment 42. As shown in FIGS. 3 to 5, the first folding door segment 41 has a rectangular shape with the vertical direction as the longitudinal direction when viewed from the front. The first inner surface 41c of the first folding door segment 41 is generally flat in the vertical direction. The first outer surface 41b of the first folding door segment 41 has a flat shape in the vertical center and lower part, but is gently curved above the center, so that the thickness of the first folding door segment 41 decreases upward. A plurality of first hinge portions 46 attached to the first folding door segment 41 are provided in the flat portion of the first outer surface 41b. In this embodiment, three first hinge portions 46 are provided at predetermined intervals in the vertical direction. The first hinge portion 46 is attached to a vertical portion 33b (see FIG. 6) of the rectangular peripheral wall 33 of the opening 32 on the vehicle front side.

[0024] The second folding door segment 42 has a rectangular shape with its longitudinal direction extending in the vertical direction when viewed from the front. The second folding door segment 42 has a larger horizontal width than the first folding door segment 41. The second inner surface 42c of the second folding door segment 42 is generally flat in the vertical direction. The second outer surface 42b of the second folding door segment 42 is flat in the vertical center and lower part, but is gently curved above the center, so that the thickness of the second folding door segment 42 decreases upward. The second folding door segment 42 and the first folding door segment 41 are connected to each other so that there is no step between the adjacent second outer surface 42b and first outer surface 41b when the folding door main body 40 is in the closed position. Furthermore, when the folding door main body 40 is in the closed position, the second folding door divided body 42 and the first folding door divided body 41 are connected to each other so that no step is created between the adjacent second inner side surface 42c and first inner side surface 41c.

[0025] As shown in Fig. 4, an upper door catch 48 is provided at the top of the second folding door division 42. This upper door catch 48 is configured so that when the folding door main body 40 is moved from the open position to the closed position, it engages with an engaged portion (not shown) provided on the upper horizontal portion 33a (see Fig. 2) of the peripheral wall 33, thereby locking the folding door main body 40. An upper actuator portion 51 is provided inside the second folding door division 42 to release the engagement state of the upper door catch 48 with the engaged portion.

[0026] A lower door catch 49 is provided at the bottom of the second folding door division 42. This lower door catch 49 is configured so that when the folding door main body 40 is moved from the open position to the closed position, it engages with an engaged portion (not shown) provided on the lower horizontal portion 33a of the peripheral wall 33, thereby locking the folding door main body 40. A lower actuator portion 52 is provided inside the second folding door division 42 to release the engagement state of the lower door catch 49 with the engaged portion.

[0027] As shown in Fig. 3, an outer handle portion 43 is provided on the second outer surface 42b of the second folding door division 42. When opening or closing the folding door main body 40 from outside the vehicle, a police officer operates the outer handle portion 43 to open or close the folding door main body 40. An outer handle sensor 53 is provided inside the second folding door division 42 at a position corresponding to the outer handle portion 43.

[0028] As shown in Fig. 4, an inner first handle portion 44 is provided on the second inner surface 42c of the second folding door partition 42. The inner first handle portion 44 is provided in the vertical center of the second folding door partition 42, near the second hinge portion 47. When opening the folding door main body 40 in the closed position from inside the vehicle, a security officer operates the inner first handle portion 44 to open the folding door main body 40. An inner handle sensor 54 is provided inside the second folding door partition 42 at a position corresponding to the inner first handle portion 44.

[0029] The upper actuator unit 51, the lower actuator unit 52, the outer handle sensor 53, and the inner handle sensor 54 are connected to a control unit (not shown). This control unit detects that the outer handle unit 43 or the first inner handle unit 44 has been operated by the outer handle sensor 53 or the inner handle sensor 54, and moves the upper actuator unit 51 and the lower actuator unit 52 to unlock the upper door catch 48 and the lower door catch 49.

[0030] Furthermore, on the second inner surface 42c of the second folding door segment 42, an elongated recess 42d is formed across the entire width of the second folding door segment 42, in the vertical center of the second folding door segment 42 and above the inner first handle portion 44. A tubular inner second handle portion 45 is provided in the elongated recess 42d so as to extend in the width direction of the second folding door segment 42 along the elongated recess 42d. The inner second handle portion 45 is formed so as to extend to the rotation tip of the second folding door segment 42.

[0031] The folding door main body 40 having the above-described structure is folded so that the first inner surface 41c of the first folding door segment 41 faces the second inner surface 42c of the second folding door segment 42, and so that the first outer surface 41b of the first folding door segment 41 faces the outer surface of the vehicle side wall 31, thereby opening the opening 32. The second folding door segment 42 of the folding door main body 40 is formed to have a larger horizontal width than the first folding door segment 41, so that when the folding door main body 40 is folded, the area indicated by arrow A in Fig. 4 protrudes from the vertical portion 33b of the peripheral wall 33 of the opening 32 toward the center of the opening 32. Furthermore, when the second folding door segment 42 of the folding door main body 40 is folded, a part of the inner second handle portion 45, which extends to the pivot tip, is exposed. Therefore, when moving the folding door body 40 from the open position of the folding door body 40, where the folding door body 40 is in a folded state, to the closed position, the security personnel can move the folding door body 40 by grasping the inner second handle portion 45. When the folding door body 40 is in the open position, the inner first handle portion 44 is covered by the first folding door divided body 41 when viewed from inside the vehicle.

[0032] In this embodiment, a folding door opening / closing mechanism 60 is provided as a mechanism for folding the folding door main body 40. The folding door opening / closing mechanisms 60 are provided at the top and bottom of the folding door main body 40. FIG. 6 is a plan view of the folding door main body 40 and the folding door opening / closing mechanism 60 when the folding door main body 40 is in the closed position. FIG. 7 is a plan view of the folding door main body 40 and the folding door opening / closing mechanism 60 when the folding door main body 40 is in the middle of opening or closing. FIG. 8 is a plan view of the folding door main body 40 and the folding door opening / closing mechanism 60 when the folding door main body 40 is in the open position. FIG. 9 is a side view showing the folding door opening / closing mechanisms 60 provided at the top and bottom of the folding door main body 40. In FIGS. 6 to 8, the right side is the front side of the vehicle. As shown in FIGS. 6 to 9, the folding door opening / closing mechanism 60 has an attachment base 65, a fixed arm member 63, and a movable arm member 64.

[0033] The mounting base 65 is provided closer to the vehicle interior than the opening 32 and in the vicinity of the horizontal portion 33 a of the rectangular peripheral wall 33 that defines the opening 32 .

[0034] The fixed arm member 63 is provided at the vertical end of the second folding door section 42 so as to protrude toward the inside of the vehicle. More specifically, a base end of the upper fixed arm member 63 is fixed to an upper mounting shaft portion 61 of the second folding door section 42. Furthermore, a base end of the lower fixed arm member 63 is fixed to a lower mounting shaft portion 62 of the second folding door section 42. The location where the base end of the fixed arm member 63 is fixed is the area indicated by arrow A in FIG. 4. In other words, when the folding door main body 40 is in the closed position, the base end of the fixed arm member 63 is fixed above and below a portion of the second folding door section 42 that protrudes from the vertical portion 33b of the peripheral wall 33 of the opening 32 toward the center of the opening 32. The tip end of the fixed arm member 63 extends perpendicular to the second inner surface 42c of the second folding door section 42.

[0035] One end of the movable arm member 64 is rotatably connected to the tip of the fixed arm member 63 around a vertical axis, and the other end is rotatably connected to the mounting base 65 around a vertical axis. More specifically, the tip of the fixed arm member 63 and one end of the movable arm member 64 are rotatably connected to each other by a first connecting shaft 66. Furthermore, the other end of the movable arm member 64 and the mounting base 65 are rotatably connected to each other by a second connecting shaft 67.

[0036] When the folding door main body 40 and the folding door opening / closing mechanism 60 are viewed in plan, the movable arm member 64 is set to have a length equal to that of an imaginary arm member 71 that linearly connects the hinge axis 46a of the first hinge portion 46 and the hinge axis 47a of the second hinge portion 47. The fixed arm member 63 is set to a length that makes the movable arm member 64 and the imaginary arm member 71 parallel to each other.

[0037] As shown in FIG. 9 , the folding door opening / closing mechanism 60 provided above the second folding door division 42 is entirely covered by an upper mounting member 68 attached to the inner surface of the vehicle side wall 31 when the folding door main body 40 is in the closed position. That is, a fixed arm member 63 attached to an upper mounting shaft portion 61 on the upper side of the second folding door division 42, a movable arm member 64 connected to the fixed arm member 63, and a mounting base 65 connected to the movable arm member 64 are housed inside the upper mounting member 68. Of these, the mounting base 65 is fixed to the inner wall surface of the upper mounting member 68. An upper slit portion 68a extending in the vehicle front-rear direction is formed on the surface of the upper mounting member 68 facing the upper mounting shaft portion 61. The fixed arm member 63 and the movable arm member 64 can freely appear and disappear from this upper slit portion 68a as the folding door main body 40 opens and closes.

[0038] The folding door opening / closing mechanism 60 provided below the second folding door section 42 is configured so that, when the second folding door section 42 is in the closed position, the fixed arm member 63 and the movable arm member 64 are hidden below the floor 36 of the room 34. More specifically, the floor 36 has an upper step 36a and a lower step 36b, and a lower mounting member 69 is provided below the lower step 36b. When the folding door main body 40 is in the closed position, the area surrounded by the lower step 36b and the lower mounting member 69 accommodates the fixed arm member 63 attached to the lower mounting shaft 62 below the second folding door section 42, the movable arm member 64 connected to the fixed arm member 63, and the mounting base 65 connected to the movable arm member 64. The mounting base 65 is fixed to the inner wall surfaces of the lower step 36b and the lower mounting member 69. A lower slit portion 69a extending in the vehicle longitudinal direction is formed on the surface of the lower step portion 36b and the lower mounting member 69 that faces the lower mounting shaft portion 62. The fixed arm member 63 and the movable arm member 64 can freely appear and disappear from this lower slit portion 69a in accordance with the opening and closing operation of the folding door main body 40.

[0039] Next, the operation of the folding door main body 40 and the folding door opening / closing mechanism 60 configured as described above will be described. First, as shown in Fig. 6 , when the folding door main body 40 is in the closed position where the folding door main body 40 closes the opening 32, the first folding door partition 41 and the second folding door partition 42 are aligned in a straight line. The fixed arm member 63 and the movable arm member 64 of the folding door opening / closing mechanism 60 on the upper side of the folding door main body 40 are housed inside the upper mounting member 68. Furthermore, the fixed arm member 63 and the movable arm member 64 of the folding door opening / closing mechanism 60 on the lower side of the folding door main body 40 are housed below the lower step portion 36b of the floor portion 36. An imaginary arm member 71 that linearly connects the hinge axis 46a of the first hinge portion 46 and the hinge axis 47a of the second hinge portion 47 is parallel to the movable arm member 64, and the imaginary arm member 71 is located closer to the vehicle outer side than the movable arm member 64. The mounting base 65 to which the movable arm member 64 is connected and the hinge shaft 47a are positioned slightly apart in the front-to-rear direction of the vehicle. The first connecting shaft portion 66 of the movable arm member 64 is located closer to the inside of the vehicle than the second connecting shaft portion 67.

[0040] When opening the folding door main body 40 from the closed position shown in Fig. 6, a security guard either grasps the outer handle portion 43 from outside the vehicle and pulls the second folding door partition 42, or grasps the inner first handle portion 44 from inside the vehicle and pushes the second folding door partition 42. At this time, the outer handle sensor 53 or the inner handle sensor 54 detects that the outer handle portion 43 or the inner first handle portion 44 has been operated, and the upper actuator portion 51 and the lower actuator portion 52 are driven. This unlocks the upper door catch 48 and the lower door catch 49, allowing the folding door main body 40 to be opened. When the security guard opens the folding door main body 40, the movable arm member 64 rotates toward the front of the vehicle around the mounting base 65.

[0041] During the opening operation of the folding door main body 40, as shown in Fig. 7, the movable arm member 64 and the imaginary arm member 71 rotate toward the front of the vehicle while maintaining a parallel state. The first folding door division 41 rotates toward the front of the vehicle around the hinge shaft 46a. Meanwhile, the second folding door division 42 rotates about the hinge shaft 47a while maintaining the inclination at the closed position (while maintaining the parallel state of the second outer surface 42b and the outer surface of the vehicle side wall 31). The reason why the second folding door division 42 rotates while maintaining the inclination at the closed position is because a four-bar link mechanism is formed by the movable arm member 64, the imaginary arm member 71, and the parts connecting both ends thereof. In this way, as the first folding door segment 41 and the second folding door segment 42 move toward the front of the vehicle, the angle between the first folding door segment 41 and the second folding door segment 42, with the hinge axis 47a as the vertex, becomes smaller, and the folding door main body 40 is folded.

[0042] When the folding door main body 40 is in the open position, as shown in Fig. 8, the first folding door segment 41 and the second folding door segment 42 are overlapped with the first inner surface 41c of the first folding door segment 41 facing the second inner surface 42c of the second folding door segment 42. Also, the first folding door segment 41 and the vehicle side wall 31 are overlapped with the first outer surface 41b of the first folding door segment 41 facing the outer surface of the vehicle side wall 31. In this open position, the second folding door segment 42 protrudes slightly from the vertical portion 33b of the peripheral wall 33 of the opening 32 toward the center of the opening 32. Also, a part of the inner second handle portion 45, which extends to the pivot tip, is exposed in this protruding portion (the area indicated by arrow A in Fig. 4). When closing the folding door body 40 in the open position from inside the vehicle, the security guard grasps the exposed inner second handle portion 45 and closes the folding door body 40. The closing operation of the folding door body 40 is the opposite of the opening operation.

[0043] As described above, the disaster prevention vehicle 1 according to this embodiment is provided with a folding door main body 40 that opens and closes a rectangular opening 32, and the folding door main body 40 has a first folding door division 41 that is attached to the peripheral wall 33 that forms the opening 32 by a first hinge portion 46 so as to be rotatable about a vertical axis, and a second folding door division 42 that is attached to the rotation tip end of the first folding door division 41 by a second hinge portion 47 so as to be rotatable about a vertical axis, and the first folding door division 41 has a first outer surface 42 that faces outward from the vehicle when the folding door main body 40 is in a closed position. 1b and a first inner surface 41c facing the inside of the vehicle, and the second folding door partition 42 has a second outer surface 42b facing the outside of the vehicle when the folding door main body 40 is in the closed position and a second inner surface 42c facing the inside of the vehicle, and the folding door opening / closing mechanism 60 is configured to open the opening 32 by folding the folding door main body 40 so that the first inner surface 41c of the first folding door partition 41 faces the second inner surface 42c of the second folding door partition 42 and so that the first outer surface 41b of the first folding door partition 41 faces the outer surface of the vehicle side wall 31.

[0044] The folding door body 40 is not a conventional single-piece door, but is a folding door type having a first folding door segment 41 and a second folding door segment 42. As a result, compared to a sliding door type single-piece door, the folding door body 40 does not protrude significantly toward the front or rear of the vehicle from the opening 32, allowing the opening 32 to be fully opened. As a result, the folding door body 40 does not interfere with the front door 2a of the front cabin 2, which is located forward of the opening 32 of the rear cabin 3, or with the shutter door 4a of the loading bay 4, which is located rearward of the opening 32 of the rear cabin 3, thereby minimizing limitations on the design layout around the folding door body 40. Furthermore, compared to a single-piece door, the folding door body 40 does not protrude significantly toward the outside or inside of the vehicle when moving from the closed position to the open position. As a result, the folding door body 40 can be fully opened even if there is little space outside or inside the vehicle for opening and closing the folding door body 40.

[0045] In this embodiment, the second folding door segment 42 is formed to have a larger horizontal width than the first folding door segment 41, and an inner second handle portion 45 extending from the pivot tip of the second folding door segment 42 is provided on the second inner surface 42c of the second folding door segment 42. This ensures that, when the folding door main body 40 is in the open position, the second inner surface 42c of the second folding door segment 42 is not entirely covered by the first inner surface 41c of the first folding door segment 41. In other words, when the folding door main body 40 in the open position is viewed from inside the vehicle, the pivot tip of the second inner surface 42c of the second folding door segment 42 is exposed. Furthermore, because the inner second handle portion 45 is provided on this exposed portion, the folding door main body 40 can be easily moved by holding the inner second handle portion 45 of the second folding door segment 42 when moving the folding door main body 40 from the open position to the closed position.

[0046] Moreover, in this embodiment, the folding door opening / closing mechanism 60 has a mounting base 65 provided inside the vehicle with respect to the opening 32 and in the vicinity of the horizontal portion 33a of the rectangular peripheral wall 33 that forms the opening 32, a fixed arm member 63 provided at the vertical end of the second folding door partition 42 so as to protrude inside the vehicle, and a movable arm member 64 having one end connected to the tip of the fixed arm member 63 so as to be rotatable about a vertical axis and the other end connected to the mounting base 65 so as to be rotatable about a vertical axis. As a result, when the folding door main body 40 is moved to the open position or the closed position, the movable arm member 64 moves in an arc centered on the mounting base 65, and therefore the tip of the fixed arm member 63 connected to one end of the movable arm member 64 moves in an arc centered on the mounting base 65. This limits the range of rotation of the pivot tip of the second folding door partition 42, so that the folding door main body 40 can be moved smoothly to the open or closed position without the pivot tip of the second folding door partition 42 protruding significantly outside the vehicle.

[0047] In this embodiment, a room 34 is formed inside the vehicle from the opening 32 in the vehicle side wall 31, and the folding door opening / closing mechanism 60 provided below the folding door main body 40 is configured so that the fixed arm member 63 and the movable arm member 64 are hidden below the floor 36 of the room 34 when the folding door main body 40 is in the closed position. This prevents the fixed arm member 63 and the movable arm member 64 from interfering with the fixed arm member 63 and the movable arm member 64 inside the room 34, even though the fixed arm member 63 and the movable arm member 64 protrude further inside the vehicle than the second folding door division 42 of the folding door main body 40. This ensures space for the team members to work and space for storing equipment inside the vehicle. It also prevents the team members' feet from getting caught on the fixed arm member 63 and the movable arm member 64.

[0048] Furthermore, in this embodiment, when the folding door main body 40 and the folding door opening / closing mechanism 60 are viewed from above, the movable arm member 64 is set to have a length equal to that of the imaginary arm member 71 that linearly connects the hinge axis 46a of the first hinge portion 46 and the hinge axis 47a of the second hinge portion 47, and the fixed arm member 63 is set to a length that makes the movable arm member 64 and the imaginary arm member 71 parallel to each other. This allows the movable arm member 64, the imaginary arm member 71, and the portions connecting their end portions to form a four-bar link mechanism. As a result, when the folding door main body 40 is moved to the open position or the closed position, the folding door main body 40 can be moved while maintaining the second outer surface 42b of the second folding door division 42 parallel to the outer surface of the vehicle side wall 31. This allows the folding door main body 40 to be moved smoothly to the open position or the closed position without the second folding door division 42 as a whole significantly protruding outward from the vehicle.

[0049] The embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. The technical scope of the present invention is not to be interpreted solely by the above-described embodiments, but is defined by the claims. The technical scope of the present invention also includes all modifications within the scope and meaning equivalent to the claims.

[0050] For example, in the above embodiment, the folding door opening / closing mechanisms 60 are provided above and below the folding door main body 40, respectively. However, the present invention is not limited to this. The folding door opening / closing mechanisms may be provided only on either the upper or lower side of the folding door main body. Furthermore, in this embodiment, the second folding door partition 42 is formed to have a larger horizontal width than the first folding door partition 41. However, the present invention is not limited to this. The widths of the first folding door partition and the second folding door partition may be set to the same size. Furthermore, in this embodiment, the movable arm member 64 is set to have a length equal to the virtual arm member 71, and the movable arm member 64 and the virtual arm member 71 are set to be parallel, but this may be changed to a non-parallel position. Furthermore, the folding door opening / closing mechanism may employ a mechanism of a different structure, rather than a mechanism using the fixed arm member 63 and the movable arm member 64 as in the folding door opening / closing mechanism 60 of this embodiment.

[0051] In addition, in the above embodiment, an opening 32 is provided in the vehicle side wall 31 of the rear cabin 3, and a folding door main body 40 and a folding door opening / closing mechanism 60 are used to open and close the opening 32, but the present invention is not limited to this, and a folding door main body and folding door opening / closing mechanism of the same structure may be used as the door of the front cabin or the door of the loading bay. [Explanation of symbols]

[0052] 1. Disaster prevention vehicles 3 Rear cabin 31 Vehicle side wall 32 Opening 33 Peripheral wall 33a Horizontal section 33b Vertical section 34 rooms 36 Floor 40 Folding door body 41 First folding door division 41b 1st outer surface 41c 1st inner surface 42 Second folding door division 42b 2nd outer surface 42c 2nd inner surface 44 First inner handle 45 Inner second handle part (handle part) 46 First hinge part 46a Hinge axis 47 Second hinge part 47a Hinge axis 60 Folding door opening and closing mechanism 63 Fixed arm member 64 Movable arm member 65 Mounting base 66 1st connecting shaft part 67 2nd connecting shaft part 71 Virtual arm components

Claims

1. A disaster prevention vehicle comprising: a folding door main body that opens and closes a rectangular opening provided in a vehicle side wall; and a folding door opening / closing mechanism that folds the folding door main body to open the opening, The folding door main body has a first folding door divided body that is attached to a peripheral wall that forms the opening by a first hinge portion so as to be rotatable about a vertical axis, and a second folding door divided body that is attached to a rotation tip end of the first folding door divided body by a second hinge portion so as to be rotatable about a vertical axis, The first folding door division has a first outer surface that faces the vehicle outer side when the folding door main body is in the closed position and a first inner surface that faces the vehicle inner side, The second folding door division has a second outer surface that faces the vehicle outer side when the folding door main body is in the closed position and a second inner surface that faces the vehicle inner side, The folding door opening / closing mechanism is configured to open the opening by folding the folding door main body so that the first inner surface of the first folding door division body faces the second inner surface of the second folding door division body and the first outer surface of the first folding door division body faces the outer surface of the vehicle side wall, The folding door opening / closing mechanism includes a mounting base provided inside the vehicle from the opening and near the horizontal portion of the rectangular peripheral wall that forms the opening, a fixed arm member provided at the top and bottom ends of the second folding door partition so as to protrude inside the vehicle, and a movable arm member having one end connected to the tip of the fixed arm member so as to be rotatable about a vertical axis and the other end connected to the mounting base so as to be rotatable about a vertical axis. A disaster prevention vehicle characterized by:

2. The second folding door division is formed to have a larger horizontal width than the first folding door division, and a handle portion is provided on the second inner surface of the second folding door division in the width direction of the second folding door division, the handle portion extending to a rotation tip end of the second folding door division.

2. The disaster prevention vehicle according to claim 1.

3. A room is formed inside the vehicle from the opening, The folding door opening / closing mechanism provided on the underside of the folding door main body is configured so that the fixed arm member and the movable arm member are hidden below the floor of the room when the folding door main body is in a closed position.

3. The disaster prevention vehicle according to claim 1 or 2.

4. The movable arm member is set to have a length equal to that of a virtual arm member that linearly connects the hinge axis of the first hinge portion and the hinge axis of the second hinge portion when the folding door main body and the folding door opening / closing mechanism are viewed in a plane, the fixed arm member is set to a length such that the movable arm member and the virtual arm member are parallel to each other; 4. The disaster prevention vehicle according to claim 1.

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