Work vehicle

Abstract

To provide a service vehicle comprising a ladder-like step by which the operation such as loading / unloading of resources / materials loaded on the upper part of a loading space room can be efficiently and safely performed.SOLUTION: A rear deck 8 is provided to the upper part of a rear bumper 7 of a vehicle rear part, and the left and right ladder-like steps 9 and 10 are built from the prescribed position of the rear deck 8 to that of a rear part of a storage. The ladder-like steps 9 and 10 comprise the ladder parts 9a, 10a extending from the prescribed position of the rear deck 8 to an upper side, the work decks 9b, 10b extending from the prescribed position of the rear part of a storage 3 to backside and connected to the upper end parts of the ladder parts 9a, 10a, and hand rails 9c, 10c, and further comprise a passage part 11 joining the work deck 9b of the left side ladder-like step 9 and the work deck 10b of the right side ladder-like step 10 in a longitudinal direction.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present invention relates to a work vehicle such as a rescue vehicle, a fire engine, or aerial work vehicle, which has materials and equipment loaded on top of a loading compartment behind a cabin. [Background technology]

[0002] In rescue vehicles, a storage compartment is provided on the loading platform behind the cabin to store materials and equipment necessary for rescue work at disaster sites such as fires and natural disasters, and ladders and other materials are loaded on top of the storage compartment. Furthermore, a ladder-like step or work platform is installed on the rear of the vehicle to load and unload the materials and equipment loaded on top of the storage compartment (for example, see Patent Document 1 below). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-159774 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, a work platform with handrails is installed at the rear of the vehicle, but the detailed structure is not shown.

[0005] An object of the present invention is to provide a work vehicle equipped with ladder-like steps that enable efficient and safe loading and unloading of materials and equipment loaded on top of the loading compartment. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a work vehicle comprising a cabin at the front of the vehicle, a loading compartment provided behind the cabin and on top of which materials and equipment are loaded, and left and right ladder-like steps extending from a predetermined position at the rear of the vehicle to a predetermined position at the rear of the loading compartment, wherein the left and right ladder-like steps each comprise a ladder section extending upward from a predetermined position at the rear of the vehicle, a work deck extending rearward from a predetermined position at the rear of the loading compartment and connected to the upper end of the ladder section, and handrails, and also comprising a passage section connecting the work deck of the left ladder-like step and the work deck of the right ladder-like step in the left-right direction. [Effects of the Invention]

[0007] According to the present invention, a work vehicle equipped with ladder-like steps can be provided that allows efficient and safe operations such as loading and unloading of materials and equipment loaded on top of the loading compartment. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a left side view of the rescue vehicle according to the embodiment. [Figure 2] FIG. 2 is a plan view of the rescue vehicle according to the embodiment. [Figure 3] FIG. 2 is a rear view of the rescue vehicle according to the embodiment. [Figure 4] FIG. 2 is a diagram showing a state in which the first to fourth doors and the cover body in FIG. 1 have been rotated to open positions. [Figure 5] FIG. 2 is a right side view of the rescue vehicle according to the embodiment. [Figure 6] In FIG. 1, this is a view showing the vicinity of the rear wheel tire housing and the lower storage portion of the storage shed adjacent to the front and rear sides of the tire housing. [Figure 7] 7(a)} shows the state in which the third door, the fourth door, and the cover body in FIG. 6 have been rotated to the open position, FIG. 7(b) shows an enlarged view of part A in FIG. 7(a), and FIG. 7(c) shows an enlarged view of part B in FIG. 7(a). [Figure 8]8A and 8B are diagrams showing the rotation mechanism on the front side of the third door as viewed from the front side, with FIG. 8A showing the closed position of the third door and FIG. 8B showing the open position of the third door. [Figure 9] 9A and 9B are diagrams showing the rotation mechanism on the rear side of the cover body as viewed from the front side, with FIG. 9A showing the cover body in the closed position and FIG. 9B showing the cover body in the open position. [Figure 10] FIG. 10 is a diagram showing a cross section of the third door in the left-right direction (vehicle width direction). [Figure 11] 1 is a view showing a cross section of the cover body in the left-right direction (vehicle width direction). FIG. [Figure 12] FIG. 10 is a perspective view showing the state in which the third door, the fourth door, and the cover body have been rotated to the open position. [Figure 13] 13(a)} is a left side view showing the upper and lower independently deployable storage shelves located in the upper and lower storage sections of the storage cabinet, and FIG. 13(b) is a view of the upper storage shelf from above. [Figure 14] 14(a) is a view of the upper storage shelf from above, showing how the upper storage shelf is rotated (deployed); FIG. 14(b) is a view of the lower rotating part of the upper storage shelf from above; and FIG. 14(c) is an enlarged view of part C in FIG. 14(b). [Figure 15] FIG. 2 is a view showing the rear part of the vehicle in FIG. [Figure 16] FIG. 2 is a rear view of the left and right ladder-like steps provided at the rear of the vehicle. [Figure 17] This is a view of the left and right ladder-like steps from above. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] 1 to 5 show the overall configuration of a rescue vehicle as a work vehicle. In the following description, the longitudinal direction of the vehicle is defined as the front-to-rear direction (the cabin side is defined as the front, and the opposite side is defined as the rear), and the direction perpendicular to the front-to-rear direction (the width direction of the vehicle) is defined as the left-to-right direction (facing the front, the left side is defined as the left side, and the right side is defined as the right side).

[0011] The rescue vehicle of this embodiment is a double-cabin vehicle consisting of a high-roof front cabin 1 and a rear cabin 2 behind it. A storage shed 3 (cargo compartment) for storing materials and equipment necessary for rescue operations is provided on the loading platform behind the rear cabin 2. The ceilings of the rear cabin 2 and the storage shed 3 form roof decks 2a and 3a, respectively (see FIG. 2). Equipment such as the arm of a telescopic crane 4 and a ladder 5 are loaded onto the roof deck 3a of the storage shed 3. {The ladder 5 is loaded onto the roof deck 3a via a known ladder lifting device (e.g., JP 2012-76609 A and the above-mentioned Patent Document 1).} Left and right outrigger units 6 and a rear bumper 7 are located behind the storage shed 3 (at the rear of the vehicle). A support unit for supporting the base of the crane 4, equipment for swinging and raising / lowering the crane 4, and other equipment and materials are loaded onto the top of the outrigger unit 6. A rear deck 8 is provided above the rear bumper 7, and left and right ladder-like steps 9, 10 are installed from the rear deck 8 to a position above the rear of the storage shed 3.

[0012] As shown in FIG. 1 (left side of the vehicle), the opening on the side of the storage bay 3 is closed by a first door 11, a second door 12, a third door 13, and a fourth door 14 that can be opened and closed. The first door 11 and the second door 12 each comprise a shutter that opens and closes vertically and covers the openings of the upper storage sections 31 and 32 of the storage bay 3. The third door 13 and the fourth door 14 each comprise a door panel that pivots vertically (or expands vertically) and covers the openings of the lower storage sections 33 and 34 of the storage bay 3, which are adjacent to the front and rear sides of a wheel well 15a that houses the rear wheels 15. The third door 13 and the fourth door 14 can be rotated between a closed position in an upright position shown in FIG. 1 that covers the openings of the lower storage sections 33 and 34, and an open position in a horizontal (including nearly horizontal) position shown in FIG. 4 that protrudes to the left. In the open positions, the third door 13 and the fourth door 14 each function as a step. The upper portion of the tire housing 15a is covered by a cover body 16 having a wheel arch 16c1. The cover body 16 is rotatable between a closed position in which it covers the upper portion of the tire housing 15a in an upright position as shown in Fig. 1, and an open position in which it juts out to the left in a horizontal (including substantially horizontal) position as shown in Fig. 4. In the closed position, the cover body 16 functions as a fender for the rear wheel 15, and in the open position, the cover body 16 functions as a step.

[0013] FIG. 4 (left side of the vehicle) shows the state in which the first door 11 and second door 12 are raised and open, and the third door 13, fourth door 14, and cover body 16 are rotated to the open position. The interior of the storage shed 3 is roughly divided into a left section and a right section, with the center in the left-right direction (vehicle width direction) as the dividing line. FIG. 4 shows the side of the left section of the storage shed 3. In FIG. 4, upper and lower independently expandable storage shelves 17 and 18, which will be described later, are arranged in the area (upper storage section 31 and lower storage section 33) forward of the tire well 15a of the storage shed 3, a unit shelf 19 made of an aluminum frame or the like is arranged in the area (upper storage section 32) above the tire well 15a of the storage shed 3, and a storage room 34a is arranged in the area (lower storage section 34) behind the tire well 15a of the storage shed 3. In the area of ​​the storage cabinet 3 where the storage shelves 17, 18 are arranged (upper storage section 31 and lower storage section 33), there are no partition shelves or members such as supports that separate the upper and lower spaces.

[0014] As shown in FIG. 5 (right side of the vehicle), the opening on the right side of the storage shed 3 is closed by a first door 11′, a second door 12′, a third door 13′, and a fourth door 14′ that can be opened and closed freely. In addition, the upper portion of the wheel well 15a that houses the rear wheel 15 is covered by a cover body 16′ having a wheel arch 16c1′. The arrangement, structure, and operation of the first door 11′, the second door 12′, the third door 13′, the fourth door 14′, and the cover body 16′ are substantially the same as those of the first door 11, the second door 12, the third door 13, the fourth door 14, and the cover body 16 on the left side. Hereinafter, the third door 13, the fourth door 14, and the cover body 16 will be described, and a description of the third door 13′, the fourth door 14′, and the cover body 16′ will be omitted. The layout of the right side of storage cabinet 3, which is closed by first door 11', second door 12', third door 13', and fourth door 14', may be the same as or different from the layout of the left side described above. For example, unit shelves made of aluminum frames or the like may be placed in the areas covered by first door 11' and second door 12', and storage rooms may be placed in the areas covered by third door 13' and fourth door 14'.

[0015] 6 and 7 show the tire well 15a of the rear wheel 15 on the left side of the vehicle and the vicinity of the lower storage sections 33 and 34 of the storage shed 3 adjacent to the front and rear sides of the tire well 15a, respectively. As shown in FIG. 6, when the third door 13, the fourth door 14, and the cover body 16 are in the closed position, the opening of the lower storage section 33 of the storage shed 3 adjacent to the front side of the tire well 15a is covered by the third door 13, the opening of the lower storage section 34 of the storage shed 3 adjacent to the rear side of the tire well 15a is covered by the fourth door 14, and the upper part of the tire well 15a is covered by the cover body 16. From this state, as shown in FIG. 7, when the third door 13 and the fourth door 14 are rotated to the open position, the openings of the lower storage sections 33 and 34 of the storage shed 3 are opened and the third door 13 and the fourth door 14 can be used as steps. Furthermore, when the cover body 16 is rotated to the open position, the cover body 16 can be used as a step.

[0016] As shown in FIGS. 7 and 8 , the third door 13 is pivotally attached to the opening of the lower storage section 33 of the storage shed 3 via front and rear pivot mechanisms 20 and 21. The front and rear pivot mechanisms 20 and 21 are respectively provided on the front outer wall of the lower storage section 33 and the front inner wall of the wheel well 15a. As shown in FIG. 8 , the front pivot mechanism 20 is mainly composed of a pivot arm 20b pivotally attached to the front outer wall of the lower storage section 33 via a pivot shaft 20a. One end of the pivot arm 20b is fixed to the base end of the front end of the third door 13, and the other end of the pivot arm 20b is pivotally connected to a shock absorber, such as a piston rod 20c1 protruding from one end of a gas damper 20c. The other end of the gas damper 20c is pivotally connected to the front outer wall of the lower storage section 33 via a bracket 20c2. The falling off of the rotating arm 20b from the rotating shaft 20a and the bending of the rotating shaft 20a due to the load received through the rotating arm 20b are prevented by a rotating shaft bracket 20a1, one end of which is connected to the shaft end of the rotating shaft 20a and the other end of which is fixed to the outer wall portion on the front side of the lower storage section 33. The rear-side rotating mechanism 21 has a structure that is substantially symmetrical to the front-side rotating mechanism 20, and is equipped with the same rotating arm 21b, gas damper 21c and bracket 21c2 as the rotating mechanism 20, but differs in that it is integrated with the rotating mechanism 24 on the front side of the cover body 16, which will be described later.

[0017] The fourth door 14 is rotatably attached to the opening of the lower storage section 34 of the storage shed 3 via front and rear pivot mechanisms 22, 23. The front and rear pivot mechanisms 22, 23 are provided on the rear inner wall of the wheel well 15a and the rear outer wall of the lower storage section 34, respectively. The front pivot mechanism 22 has a structure symmetrical to the rear pivot mechanism 21 of the third door 13, and includes a pivot arm 22b, a gas damper 22c, and a bracket 22c2 similar to those of the pivot mechanism 21, and is integrated with a pivot mechanism 25 on the rear side of the cover body 16, which will be described later. The rear pivot mechanism 23 has a structure symmetrical to the front pivot mechanism 20 of the third door 13, and includes a pivot shaft 23a, a pivot shaft bracket, a pivot arm 23b, a gas damper 23c, and a bracket 23c2 similar to those of the pivot mechanism 20.

[0018] As shown in FIGS. 7 and 9, the cover body 16 is rotatably attached to the opening of the tire housing 15a of the rear wheel 15 via front and rear pivot mechanisms 24 and 25. The front and rear pivot mechanisms 24 and 25 are provided on the front and rear inner walls of the tire housing 15a, respectively. As shown in FIG. 9, the rear pivot mechanism 25 is mainly composed of a pivot arm 25b rotatably attached to the rear inner wall of the tire housing 15a via a pivot shaft 25a. One end of the pivot arm 25b is fixed to the base end of the rear end of the cover body 16, and the other end of the pivot arm 25b is rotatably connected to a shock absorber, such as a piston rod 25c1 protruding from one end of a gas damper 25c. The other end of the gas damper 25c is rotatably connected to the rear inner wall of the tire housing 15a via a bracket 25c2. The falling off of the pivot arm 25b from the pivot shaft 25a and the bending of the pivot shaft 25a due to the load received through the pivot arm 25b are prevented by a pivot shaft bracket 25a1, one end of which is connected to the shaft end of the pivot shaft 25a and the other end of which is fixed to the inner wall portion on the rear side of the wheel well 15a. The front pivot mechanism 24 has a structure symmetrical to the rear pivot mechanism 25, and includes the same pivot shaft 24a, pivot shaft bracket, pivot arm 24b, gas damper 24c, and bracket 24c2 as the pivot mechanism 25.

[0019] As described above, the pivot mechanism 22 on the front side of the fourth door 14 is integrated with the pivot mechanism 25 on the rear side of the cover body 16. As shown in an enlarged view in FIG. 7(c), the pivot mechanisms 22 and 25 have a common pivot shaft 25a that rotatably supports the pivot arms 22b, 25b relative to the inner wall portion on the rear side of the wheel well 15a, and also share a pivot shaft bracket 25a1. Note that the bracket 22c2 of the pivot mechanism 22 and the bracket 25c2 of the pivot mechanism 25 may be configured as a single bracket and shared. The pivot mechanism 21 on the rear side of the third door 13 is also integrated with the pivot mechanism 24 on the front side of the cover body 16 in a similar manner as described above.

[0020] FIG. 10 shows a cross section of the third door 13 in the left-right direction (vehicle width direction). The third door 13 is primarily comprised of a main frame 13a (see FIG. 8) made of a steel material such as stainless steel, a step plate 13b attached to the frame of the main frame 13a, and a decorative outer panel 13c attached to the underside of the main frame 13a in the same figure. One end of a pivot arm 20b of a pivot mechanism 20 is fixed to the base end of the front end of the main frame 13a, and one end of a pivot arm 21b of a pivot mechanism 21 is fixed to the base end of the rear end of the main frame 13a. The step plate 13b has a laminated structure consisting of a honeycomb-structured core member 13b1 made of a resin material such as polypropylene resin and a metal plate, such as an aluminum checkered plate 13b2, attached to the top side of the core member 13b1 in the same figure. The core member 13b1 is housed in the frame of the main frame 13a. The aluminum checkered plate 13b2 is laminated on the core material 13b1 and fixed to the frame of the main frame 13a by appropriate means. The upper surfaces of the main frame 13a and the step plate 13b in the same figure form the step surface S1 on which an operator can board. The load acting on the step plate 13b is supported by beams 13a1 and 13a2 provided on the main frame 13a. By using a honeycomb-structured core material 13b1 as the core material of the step plate 13b, the third door 13 can be made lighter while ensuring its load-bearing strength. The decorative outer plate 13c also forms part of the left side of the vehicle body. Although not shown, the fourth door 14 has a structure similar to that of the third door 13.

[0021] FIG. 11 shows a cross section of the cover body 16 in the left-right direction (vehicle width direction). The cover body 16 is mainly composed of a frame-shaped main frame 16a (see FIG. 9) made of steel such as stainless steel, a step plate 16b attached to the frame of the main frame 16a, and a decorative outer panel 16c attached to the underside of the main frame 16a in the same figure. The decorative outer panel 16c includes the wheel arch 16c1 described above. One end of the pivot arm 24b of the pivot mechanism 24 is fixed to the base end of the front end of the main frame 16a, and one end of the pivot arm 25b of the pivot mechanism 25 is fixed to the base end of the rear end of the main frame 16a. The step plate 16b is mainly made of a metal plate, for example, aluminum checkered plate, and is divided into segments 16b1 and 16b2 at the middle in the left-right direction. The base end of segment 16b1 on the right side in the figure (the tip end side of cover body 16) is connected to the tip end of main frame 16a by hinge 16b11, and the base end of segment 16b2 on the left side in the figure (the base end side of cover body 16) is connected to the tip end of segment 16b1 by hinge 16b21. A reinforcing member 16b12 and a magnet 16b13 are attached to the underside of segment 16b1, and a reinforcing member 16b22 and a magnetic catch 16b23 are attached to the underside of segment 16b2. Segment 16b1 can be rotated about hinge 16b11 as a fulcrum to change its position between the lying position shown in the figure and an upright position (see FIG. 9(b)) in which it stands upright. Furthermore, segment 16b2 can be rotated about hinge 16b21 as a fulcrum to change its position between the lying position shown in the figure and a folded position (see FIG. 9(a)) in which segment 16b1 is folded toward the bottom side of segment 16b1. The upper surfaces of main frame 16a and step plate 16b (segments 16b1 and 16b2 in the lying position) in the figure form step surface S2 on which an operator can stand. The load acting on step plate 16b is supported by beams 16a1 and 16a2 provided on main frame 16a.

[0022] As shown in FIG. 8(a), when the third door 13 is in the closed position shown in FIG. 8(a), it covers and closes the opening of the lower storage section 33 of the storage shed 3. The closed position of the third door 13 is determined by the tip of the third door 13 abutting against a stopper 33a provided at the top of the lower storage section 33. The other end of the pivot arm 20b is biased by the piston rod 20c1 of the gas damper 20c, thereby holding the third door 13 in the closed position. In this closed position, the outer surface of the third door 13 (the outer surface of the decorative outer panel 13c) is flush (including approximately flush) with the outermost edge P of the adjacent vehicle body in the fore-and-aft direction, and forms part of the left side of the vehicle body. When the third door 13 is pivoted from the closed position shown in FIG. 8(a) to the open position shown in FIG. 8(b), the opening of the lower storage section 33 is opened. The open position of the third door 13 is determined by the base end of the third door 13 (the base end of the main frame 13a) abutting against a stopper 33b provided on the underside of the lower storage section 33. In this open position, the third door 13 protrudes to the left in a horizontal (including approximately horizontal) position, allowing an operator to board the door on a step surface S1 on its upper surface. When an operator boards the door, the moment load acting on the third door 13 is supported by the base end of the third door 13 abutting against the stopper 33b. Furthermore, with the third door 13 in a horizontal position in the open position, the portion of the pivot arm 20b that is higher than the step surface S1 is located closer to the center in the left-right direction (vehicle width direction) than the position along the outermost edge P of the vehicle body. This also applies to the pivot arm 21b of the pivot mechanism 21 on the rear side, and further to the pivot arm 22b of the pivot mechanism 22 on the front side of the fourth door 14 and the pivot arm 23b of the pivot mechanism 23 on the rear side.

[0023] As shown in FIG. 9(a), the cover body 16 covers the upper portion of the tire well 15a when in the closed position shown in FIG. 9(a). The closed position of the cover body 16 is determined by the tip of the cover body 16 abutting against a stopper 15a1 provided at the top of the tire well 15a. The other end of the pivot arm 25b is biased by a piston rod 25c1 of a gas damper 25c, thereby holding the cover body 16 in the closed position. In this closed position, the step plate 16b is stored in the upper part of the tire well 15a with the divided body 16b1 in the upright position and the divided body 16b2 in the folded position. In addition, in this closed position, the outer surface of the cover body 16 (the outer surface of the decorative outer panel 16c) is flush (including approximately flush) with the outermost edge P of the adjacent vehicle body in the fore-aft direction, and the decorative outer panel 16c forms a fender on the left side of the vehicle body. The step plate 16 (segments 16b1 and 16b2) is hidden inside the portion of the decorative outer panel 16c above the wheel arch 16c1. The cover body 16 is then rotated from the closed position shown in FIG. 1(a) to the position shown in FIG. 1(b). The segment 16b2 is then rotated around the hinge 16b21, and the segment 16b1 is rotated around the hinge 16b11, placing the segments 16b1 and 16b2 in the flat position described above. This positions the cover body 16 in the open position. The open position of the cover body 16 is determined by the base end of the cover body 16 (the base end of the main frame 16a) abutting against the stopper 15a2 provided on the underside of the wheel well 15a. In this open position, the cover body 16 extends leftward in a horizontal (or substantially horizontal) position, allowing an operator to board the step surface S2 on its upper surface. When an operator gets on the vehicle, the moment load acting on the cover body 16 is supported by the base end of the cover body 16 abutting against the stopper 15a2. Furthermore, when the cover body 16 is in the horizontal position in the open position, the portion of the pivot arm 25b of the pivot mechanism 25 that is higher than the step surface S2 is located closer to the center in the left-right direction (vehicle width direction) than the position along the outermost edge P of the vehicle body. This also applies to the pivot arm 24b of the pivot mechanism 24 on the front side.

[0024] 12 shows the third door 13, the fourth door 14, and the cover body 16 when they are each moved to the open position. In the open position, the step surface S1 on the top surface of the third door 13, which protrudes to the left in a horizontal position, the step surface S2 on the top surface of the cover body 16, and the step surface S3 on the top surface of the fourth door 14 are flush (or nearly flush) with each other, with no (or almost no) steps. Furthermore, because there are no pillars installed with a hinge-type rotation mechanism, the distances between the step surfaces S1, S2, and S3 are made as small as possible. Furthermore, the pivot arms 20b, 21b of the pivot mechanisms 20, 21 for the third door, the pivot arms 22b, 23b of the pivot mechanisms 22, 23 for the fourth door, and the pivot arms 24b, 25b of the pivot mechanisms 24, 25 for the cover body 16 all have portions that are higher than the step surfaces S1, S2, S3 in positions closer to the center in the left-right direction than the positions along the outermost edge P of the vehicle body. In other words, the pivot arms 20b, 21b of the pivot mechanisms 20, 21 for the third door, the pivot arms 22b, 23b of the pivot mechanisms 22, 23 for the fourth door, and the pivot arms 24b, 25b of the pivot mechanisms 24, 25 for the cover body 16 do not have portions that protrude above the step surfaces S1, S2, S3 in an area to the left (tip side) of the positions along the outermost edge P of the vehicle body. This prevents workers from tripping on step surfaces S1, S2, S3, improving safety. Moreover, because third door pivot mechanisms 20, 21 are provided outside lower storage section 33, and fourth door pivot mechanisms 22, 23 are provided outside lower storage section 34, the storage volumes of lower storage sections 33, 34 can be used effectively.

[0025] 13 and 14 show the upper and lower independently expandable storage shelves 17, 18 arranged in the upper storage section 31 and the lower storage section 33 of the storage cabinet 3.

[0026] The upper storage shelf 17 disposed in the upper storage section 31 of the storage cabinet 3 is rotatably attached to upper and lower rotating parts 17a and 17b provided near the opening in the front side wall of the upper storage section 31. The upper rotating part 17a includes a holding bracket 17a1 fixed to the front inner wall of the upper storage section 31 and a rotating shaft 17a2 attached to the holding bracket 17a1. The lower rotating part 17b includes a holding bracket 17b1 fixed to the front inner wall of the upper storage section 31, a rotating shaft 17b2 attached to the holding bracket 17b1, and a base plate 17b3 attached to the upper surface of the holding bracket 17b1. The storage shelf 17 is attached to the rotating shafts 17a2 and 17b2 of the rotating parts 17a and 17b, and can rotate horizontally about the rotating shafts 17a2 and 17b2. 14, the lower rotating portion 17b is provided with a holding mechanism 17c that holds the position of the storage shelf 17. In this embodiment, the holding mechanism 17c is configured as a latch mechanism and includes a shaft-shaped latch claw 17c1 that is provided on the underside of the storage shelf 17 so as to be able to protrude and retract, a plurality of engagement holes 17c2 that are provided on the base plate 17b3 and are engageable with the latch claw 17c1 in the rotational direction, and an operation handle 17c3 that operates the protruding and retracting movement of the latch claw 17c1. The plurality of engagement holes 17c2 are arranged along the rotational path of the latch claw 17c1, with the center of the rotation shaft 17b2 as the fulcrum. Specifically, engagement holes 17c2 are provided at a position where latch claw 17c can be engaged when storage shelf 17 is stored in upper storage section 31 (storage end position: rotation angle 0°), a position where latch claw 17c can be engaged when storage shelf 17 is rotated to the outside of upper storage section 31 to the maximum (rotation end position: for example, rotation angle 110°), and intermediate positions between the storage end position and the rotation end position, for example, positions at rotation angles of 40° and 90°. Latch claw 17c1 is connected to operation handle 17c3 via link rod 17c4, and when operation button 17c5 of operation handle 17c3 is pressed, latch claw 17c1 retracts to the underside of storage shelf 17, and when operation button 17c5 is released, latch claw 17c1 autonomously moves out from the underside of storage shelf 17.In addition, in Figure 14 (b), counterclockwise rotation of the storage shelf 17 from the storage end position is restricted by a stopper 17b31 provided on the base plate 17b3, and clockwise rotation of the storage shelf 17 from the rotation end position is restricted by a stopper 17b32 provided on the base plate 17b3.

[0027] At the storage end position (rotation angle 0°), latch claw 17c1 engages with engagement hole 17c2, thereby holding storage shelf 17 in the storage end position. When pulling out (deploying) storage shelf 17 from upper storage section 31, operation button 17c5 of operation handle 17c3 is pressed to retract latch claw 17c1 and disengage it from engagement hole 17c2, and then storage shelf 17 is rotated to the side of upper storage section 31. For example, after rotating storage shelf 17 slightly from the storage end position, if operation button 17c5 is released and storage shelf 17 is rotated further, latch claw 17c1 slides along base plate 17b3, and when storage shelf 17 has rotated to a position at a rotation angle of 40°, latch claw 17c1 autonomously moves out and engages with engagement hole 17c2 at that position. By performing the same operation up to the rotation end position (rotation angle 110°) at a rotation angle of 90°, the storage shelf 17 can be held at each of the rotation angle positions of 40°, 90°, and 110°.

[0028] The lower storage shelf 18 disposed in the lower storage section 33 of the storage cabinet 3 is rotatably attached to upper and lower rotating parts 18a and 18b provided near the opening in the front side wall of the lower storage section 33. The upper rotating part 18a includes a holding bracket 18a1 fixed to the front inner wall of the lower storage section 33 and a rotating shaft 18a2 attached to the holding bracket 18a1. The lower rotating part 18b includes a rotating shaft 18b1 attached to the bottom of the lower storage section 33 and a base plate 18b2 attached to the bottom of the lower storage section 33. The lower rotating part 18b is provided with a holding mechanism similar to the holding mechanism 17c described above. The storage shelf 18 is attached to the rotating shafts 18a2 and 18b1 of the rotating parts 18a and 18b, and is rotatable horizontally about the rotating shafts 18a2 and 18b1. The rotational movement of this storage shelf 18 can be performed independently of the upper storage shelf 17. The detailed structure and operation of storage shelf 18 are the same as those of storage shelf 17, and like storage shelf 17, storage shelf 18 can be held at rotation angles of 40°, 90°, and 110°.

[0029] The vertically independently deployable storage shelves 17, 18 in this embodiment can be held at multiple positions with a rotation angle of 90° or less (rotation angles of 40° and 90°) and at a position with a rotation angle of more than 90° (rotation angle of 110°), making it possible to easily and quickly store and remove materials and equipment from the storage shelves 17, 18. Furthermore, because the storage shelves 17, 18 can be rotated to a position with a rotation angle of more than 90° (rotation angle of 110°), access to the center of the storage shed 3 in the left-right direction (vehicle width direction) is facilitated, making it possible to quickly remove materials and equipment stored in the center of the storage shed 3 in the left-right direction. Furthermore, materials and equipment can be placed on the top surface (ceiling surface) of the storage shelf 18, and by rotating the storage shelf 17 relative to the storage shelf 18, materials and equipment placed on the top surface (ceiling surface) of the storage shelf 18 can be easily removed. The storage shelves 17 and 18 may be integrally constructed so that they can be deployed (rotated) as a unit to the above positions.

[0030] 15 to 17 show the rear of the vehicle. A rear deck 8 is provided above a rear bumper 7 at the rear of the vehicle, and left and right ladder-like steps 9, 10 are installed from a predetermined position on the rear deck 8 to a predetermined position at the rear of the storage shed 3. The left and right ladder-like steps 9, 10 each include a ladder section 9a, 10a extending upward from a predetermined position on the rear deck 8, a work deck 9b, 10b extending rearward from a predetermined position at the rear of the storage shed 3 and connected to the upper ends of the ladder sections 9a, 10a, and handrails 9c, 10c, as well as a walkway section 11 connecting the work deck 9b of the left ladder-like step 9 and the work deck 10b of the right ladder-like step 10 in the left-right direction.

[0031] The ladder sections 9a, 10a of the left and right ladder-like steps 9, 10 each have an upright section 9a1, 10a1 extending upward from a predetermined position on the rear deck 8, and an inclined section 9a2, 10a2 that gradually slopes upward from the upper end of the upright section 9a1, 10a1 in a direction approaching the work decks 9b, 10b.

[0032] The handrail 9c of the left-side ladder-like step 9 is located on either side of the left and right sides of the inclined portion 9a2 of the ladder section 9a, and has left and right first portions 9c1 extending along the sides of the inclined portion 9a2 while maintaining the same (equivalent) height as both sides of the inclined portion 9a2, a second portion 9c2 of a predetermined height provided on the left edge of the work deck 9b, and an inclined third portion 9c3 connecting the left-side first portion 9c1 and second portion 9c2. Similarly, the handrail 10c of the right-side step 10 is located on either side of the left and right sides of the inclined portion 10a2 of the ladder section 10a, and has left and right first portions 10c1 extending along the sides of the inclined portion 10a2 while maintaining the same (equivalent) height as both sides of the inclined portion 10a2, a second portion 10c2 of a predetermined height provided on the right edge of the work deck 10b, and an inclined third portion 10c3 connecting the right-side first portion 10c1 and second portion 10c2.

[0033] The work deck section 9b, the work deck section 10b, and the passage section 11 are each made of a floor material (such as aluminum checkered plate) on which workers can stand. In this embodiment, as shown in Figure 17, in order to improve snow removal during snowfall, part of the work deck sections 9b, 10b, particularly the front part of the ladder sections 9a, 10a, is made of grating, for example, aluminum grating 9b1, 10b1, and the other parts are made of aluminum checkered plate.

[0034] The ladder-like steps 9, 10 in this embodiment can be ascended and descended from either the left or right side of the rear of the vehicle, and are provided with relatively spacious work decks 9b, 10b at the top of the ladder sections 9a, 10a.Furthermore, movement between the left and right work decks 9b, 10b can be carried out through the passage section 11, so that work such as loading and unloading of materials and equipment loaded on the roof deck 3a of the storage shed 3 can be carried out efficiently and safely.

[0035] Furthermore, when loading and unloading a ladder 5 loaded onto the roof deck 3a of the storage shed 3 via a known ladder lifting device, the ladder 5 assumes an inclined position at the rear of the vehicle as shown in Fig. 15. In this embodiment, the handrails (first portions 9c1, 10c1) of the inclined portions 9a2, 10a2 of the ladder sections 9a, 10a of the ladder-shaped steps 9, 10 are located on the left and right sides of the inclined portions 9a2, 10a2, respectively, and are shaped to extend along the sides of the inclined portions 9a2, 10a2 while maintaining the same (same) height as both sides of the inclined portions 9a2, 10a2. This prevents the handrails 9c from interfering with the ladder 5 when loading and unloading the ladder 5, allowing for smooth loading and unloading. Preferably, the inclination angles of the ladder sections 9a, 10a and the first portions 9c1, 10c1 are the same as the inclination angle of the ladder 5 when loading and unloading the ladder 5. Furthermore, this type of handrail structure only needs to be applied to at least the side of the left and right ladder-like steps 9, 10 on which the ladder 5 is loaded, i.e., in this embodiment, the left ladder-like step 9, and the handrail 10c of the right ladder-like step 10 may have a different structure from that described above.

[0036] Additionally, two upper and lower steps 7a, 7b are provided on the rear surface of the rear bumper 7. The upper and lower steps 7a, 7b are each rotatable between a closed position in an upright position shown in FIG. 16 and an open position in a horizontal position protruding rearward shown in FIG. 15. In the closed position, the upper and lower steps 7a, 7b each constitute part of the rear bumper 7. The width dimension W of the upper and lower steps 7a, 7b is set to be larger than the shortest distance L between the left side of the ladder portion 9a of the left ladder-shaped step 9 and the right side of the ladder-shaped step 10, 10a. Therefore, using the upper and lower steps 7a, 7b improves convenience and safety when accessing the left and right ladder-shaped steps 9, 10 from the rear of the vehicle. [Explanation of symbols]

[0037] 1 forward cabin 2 rear cabin 3. Storage 33 Lower storage area 34 Lower storage area 7 Rear bumper Step 7a Step 7b 8. Aft Deck 9 Ladder Steps 9a Ladder section 9b Work Deck 9c Handrail 9c1 Part 1 9c2 2nd part 9c3 3rd part 10 Ladder Steps 10a Ladder section 10b Work Deck 10c Handrail 10c1 Part 1 10c2 2nd part 10c3 3rd part 11 Passage section 13 Door 14 Doors 15 rear wheel 15a Tire house 16 Cover body 20 Rotating mechanism 20a Rotating shaft 20b Rotating arm 21 Rotating mechanism 21b Rotating arm 22 Rotating mechanism 22b Rotating arm 23 Rotating mechanism 23a Rotating shaft 23b Rotating arm 24 Rotating mechanism 24a Rotating shaft 24b Rotating arm 25 Rotating mechanism 25a Rotating shaft 25b Rotating arm

Claims

1. A work vehicle comprising a cabin at the front of the vehicle, a loading compartment provided behind the cabin and on top of which materials and equipment are loaded, and left and right ladder-like steps extending from a predetermined position at the rear of the vehicle to a predetermined position at the rear of the loading compartment, The left and right ladder-shaped steps each include a ladder section extending upward from a predetermined position at the rear of the vehicle, a work deck extending rearward from a predetermined position at the rear of the loading compartment and connected to the upper end of the ladder section, and a handrail; The ladder portions of the left and right ladder-shaped steps each have an inclined portion that is inclined in a direction gradually approaching the work deck from the lower side toward the upper side, A work vehicle characterized in that the handrail of at least one of the left and right ladder-shaped steps is located on the left and right sides of the inclined portion of the ladder section, and has left and right first portions that extend along the sides of the inclined portion while maintaining the same height as the sides of the inclined portion.

2. 2. The work vehicle according to claim 1, wherein the handrail of at least one of the left and right ladder-shaped steps has the left and right first portions, a second portion of a predetermined height provided on a side edge of the work deck, and a third portion connecting one of the left and right first portions and the second portion.

3. The handrail of the ladder-like step on the left side has the first parts on the left and right, a second part of a predetermined height provided on the left edge of the work deck, and a third part connecting the first part and the second part on the left side, 2. The work vehicle according to claim 1, wherein the handrail of the ladder-shaped step on the right side has the left and right first portions, a second portion of a predetermined height provided on the right edge of the work deck, and a third portion connecting the first portion and the second portion on the right side.

4. A work vehicle as described in any one of claims 1 to 3, wherein two upper and lower steps are provided at a position below the left and right ladder-shaped steps at the rear of the vehicle, and each of the two upper and lower steps is rotatable between a closed position in an upright position and an open position in which it extends rearward in a horizontal position, and has a width dimension greater than the shortest distance between the left side of the ladder portion of the left ladder-shaped step and the right side of the ladder portion of the right ladder-shaped step.

5. A work vehicle as described in claim 1, which is provided with a passageway portion connecting the work deck of the ladder-like step on the left side and the work deck of the ladder-like step on the right side in the left-right direction.

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