Specialized vehicles

Abstract

We provide specialized vehicles that can balance work efficiency and storage capacity. [Solution] The system comprises a chassis frame and a mounting structure 3 mounted on the chassis frame, having an upper wall portion 330 that allows workers positioned above to work. The upper wall portion 330 has a first recess 3301 that is recessed toward the chassis frame side. The mounting structure 3 comprises a second mounting structure B2 and a first mounting structure B1 adjacent to the second mounting structure B2. The upper wall portion of the first mounting structure B1 is located at a higher position than the upper wall portion 330 of the second mounting structure B2, and the second mounting structure B2 has the first recess 3301.

Description

Technical Field

[0001] The present invention relates to a special vehicle capable of working on the upper part of a loading box.

Background Art

[0002] Conventionally, special vehicles capable of working on the upper part of a loading box are known. The tanker described in Patent Document 1 includes a tank mounted on a chassis frame and having a manhole through which liquid can be poured into the upper part, and a tread board corresponding to a work platform disposed on the upper part of the tank. Thereby, an operator performs an operation of pouring into the tank of a transported product or an inspection operation inside the tank on the tread board.

Prior Art Documents

Patent Documents

[0003] [[ID=~]]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the tanker described in Patent Document 1, since the tank as the loading box is disposed below the tread board, the storage capacity of the tank decreases. That is, by providing a work platform for an operator, not only is the overall height of the tank itself reduced, but a dead space that cannot be used for storing articles is generated between the tank and the tread board. Therefore, it has been difficult to achieve both workability and storage capacity with the technology of Patent Document 1.

[0005] Therefore, an object of the present invention is to provide a special vehicle capable of achieving both workability and storage capacity.

Means for Solving the Problems

[0006] The special-purpose vehicle of the present invention comprises a chassis frame and a cargo box mounted on the chassis frame, having a ceiling wall from which a worker positioned above can work, wherein the ceiling wall has a first recess that is recessed toward the chassis frame side.

[0007] According to the present invention, by forming a partially lower first recess in the ceiling wall, the workability of workers on the upper part of the cargo box can be improved, and the storage capacity of the first cargo box can be improved.

[0008] Furthermore, the ceiling wall is characterized by further comprising a railing portion extending upward from at least a portion of the periphery of the first recess.

[0009] According to the above configuration, the safety of workers can be ensured while keeping the vertical dimensions of the fence section to a minimum.

[0010] Furthermore, the cargo box comprises a first cargo box and a second cargo box adjacent to the first cargo box. The ceiling wall of the first cargo box is located at a higher position than the ceiling wall of the second cargo box, and the second cargo box is characterized in that it has the first recess.

[0011] According to the above configuration, the fence section on the side of the lower first cargo box adjacent to the higher second cargo box can be omitted or made lower.

[0012] The fence section is characterized by having a hinge section that can rotate around a horizontal axis, and a movable fence section attached to the hinge section that can be changed between a retracted position in which the tip is located downward and an extended position in which the tip is located higher than the position in the retracted position.

[0013] According to the above configuration, a fence section can be obtained that does not obstruct movement while ensuring the safety of workers.

[0014] Also provided are a chassis frame and a load box mounted on the chassis frame and having side walls. The side walls have a second recess that is recessed inside the load box and extends in the vertical direction, and the second recess has a plurality of horizontal bars that extend in the horizontal direction and constitute a ladder.

[0015] According to the above configuration, it is possible to form a form in which the ladder is embedded in the side wall without impairing the storage capacity of the load box as much as possible.

Advantages of the Invention

[0016] According to the present invention, it is possible to provide a special-purpose vehicle that can achieve both workability and storage capacity.

Brief Description of the Drawings

[0017] [Figure 1] FIG. 1 is a side view of a special-purpose vehicle according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the special-purpose vehicle according to the embodiment. [Figure 3] FIG. 3 is a rear view of the special-purpose vehicle according to the embodiment. [Figure 4] FIG. 4 is a side view of the vehicle of the special-purpose vehicle according to the embodiment. [Figure 5] FIG. 5 is a plan view of the vehicle of the special-purpose vehicle according to the embodiment. [Figure 6] FIG. 6 is an enlarged view of a longitudinal cross-section side of the special-purpose vehicle according to the embodiment. [Figure 7] FIG. 7 is an explanatory view of a first mounted object of the special-purpose vehicle according to the embodiment, and is an explanatory view of a state of viewing the first mounting portion from the rearward side. [Figure 8] FIG. 8 is an explanatory view of a tank fairing portion of the special-purpose vehicle according to the embodiment. [Figure 9] FIG. 9 is an explanatory view of a transport device of the special-purpose vehicle according to the embodiment. [Figure 10] FIG. 10 is an explanatory view of a second mounted object of the special-purpose vehicle according to the embodiment. [Figure 11] FIG. 11 is an explanatory view of a delivery device of the special-purpose vehicle according to the embodiment. [Figure 12] FIG. 12 is an explanatory view of the usage state of the special vehicle according to this embodiment. [Figure 13] FIG. 13 is a side view of the special vehicle according to the modification.

MODE FOR CARRYING OUT THE INVENTION

[0018] Hereinafter, a special vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0019] The special vehicle 1 according to this embodiment is, for example, a bulk carrier. Specifically, the special vehicle 1 is an air conveyance vehicle capable of conveying bulk materials using air. As shown in FIGS. 1 to 3, the special vehicle 1 includes a vehicle 2 and a mounted object 3 mounted on the vehicle 2.

[0020] In the following description, the direction corresponding to the front and rear of the special vehicle 1 is referred to as the front-rear direction, the direction corresponding to the width of the special vehicle 1 is referred to as the width direction, and the direction corresponding to the up and down of the special vehicle 1 (the direction orthogonal to the front-rear direction and the width direction) is referred to as the up-down direction. Also, the direction facing forward in the front-rear direction (the traveling direction of the vehicle) is referred to as the front direction, and the direction facing backward in the front-rear direction is referred to as the rear direction. Further, the left side when facing the front direction may be referred to as the left direction, and the opposite direction may be referred to as the right direction.

[0021] As shown in FIGS. 4 and 5, the vehicle 2 has a driver's cab 20 and a chassis frame 21 disposed rearward from the driver's cab 20.

[0022] The driver's cab 20 is provided with a driver's seat on which a driver sits, various operating devices necessary for driving, and various operating devices necessary for work.

[0023] As shown in FIG. 5, the chassis frame 21 has a plurality of main frames 210 extending rearward from the driver's cab 20 and a plurality of cross members 211 extending along the width direction and fixed to each of the plurality of main frames 210.

[0024] Multiple mainframes 210 are arranged in the lateral direction and are spaced apart from each other in the lateral direction. Furthermore, the multiple mainframes 210 are parallel to each other. The chassis frame 21 of this embodiment has two mainframes 210.

[0025] Multiple cross members 211 are arranged in the front-to-back direction and are spaced apart from each other in the front-to-back direction. Furthermore, multiple cross members 211 are parallel to each other. The chassis frame 21 of this embodiment has three cross members 211.

[0026] The bodywork 3 of this embodiment includes a first bodywork B1 arranged rearward from the driver's cab 20, and a second bodywork B2 arranged rearward from the first bodywork B1 (see Figures 1 and 2). The bodywork 3 is mounted on the chassis frame 21. The bodywork 3 corresponds to, for example, a "cargo box".

[0027] As shown in Figure 6, the first structure B1 includes a tank 30 for storing transported goods and a transport device 31 for transporting the goods stored in the tank 30 to the outside of the tank 30 (specifically, to a chute, which will be described later). The first structure B1 corresponds to, for example, the "first cargo box (high cargo box)".

[0028] The granular material contained inside the tank 30 is composed of multiple (many) granular materials such as wood pellets, wood chips, or powder from crushed wood, and possesses fluidity. The transported material is not limited to wood pellets, etc. At a minimum, any granular material with fluidity that can be transported by air is acceptable, and can be arbitrarily selected.

[0029] As shown in Figure 7, the tank 30 includes a tank input section 300 in which a space capable of accommodating transported material is formed inside, a tank guide section 301 that guides the transported material introduced into the tank input section 300 to the transport device 31, a tank flow straightening section 302 (see Figure 8) that straightens the flow of the transported material introduced into the tank input section 300, and a tank erection section 303 that is erected on the chassis frame 21.

[0030] The tank loading section 300 constitutes the upper end of the tank 30. The tank loading section 300 also has an upper wall section 3000, a pair of side wall sections 3001 facing each other in the width direction, a pair of lower wall sections 3002, a front surface 3003 (see Figure 6), and a rear surface 3004. The upper wall section 3000 corresponds to, for example, a "ceiling wall".

[0031] An opening 3005 is formed in the upper wall 3000 of the tank loading section 300, which penetrates vertically. The opening 3005 of the tank loading section 300 is formed towards the rear of the upper wall 3000. The upper wall 3000 is formed in a rectangular shape and constitutes a substantially horizontal plane. Furthermore, as shown in Figures 2 and 7, an opening / closing door 3006 is attached to the upper wall 3000 of the tank loading section 300, which allows the opening 3005 to be opened and closed manually using a handle 3007.

[0032] As shown in Figure 7, one of the pair of lower wall portions 3002 extends inward in the width direction from the lower end of one of the pair of side wall portions 3001. The other of the pair of lower wall portions 3002 extends inward in the width direction from the lower end of the other of the pair of side wall portions 3001. The pair of lower wall portions 3002 are separated in the width direction.

[0033] The tank guide section 301 is composed of a pair of inclined sections 3010 that are spaced apart in the lateral direction. One of the pair of inclined sections 3010 is continuous with one of the pair of lower wall sections 3002. The other of the pair of inclined sections 3010 is continuous with the other of the pair of lower wall sections 3002.

[0034] Each of the pair of inclined sections 3010 is plate-shaped. Furthermore, each of the pair of inclined sections 3010 is inclined such that its inner end, which is positioned inward in the lateral direction, is located lower than its outer end, which is positioned outward in the lateral direction. Therefore, the inner surfaces of each of the pair of inclined sections 3010 (the inner surfaces facing the tank input section 300) are also inclined such that their inner ends, which are positioned inward in the lateral direction, are located lower than their outer ends, which are positioned outward in the lateral direction. In addition, each of the pair of inclined sections 3010 is fixed so that its outer end is in contact with the side wall section 3001 without any gaps.

[0035] The distance between the pair of inclined sections 3010 gradually narrows as it extends downwards. Therefore, the tank 30 is formed such that the width at the lower end is smaller than the width at the upper end of the tank 30, and the width at the lower end of the tank guide section 301 (i.e., the distance between the lower ends of the pair of inclined sections 3010) is smaller than the maximum width of the tank loading section 300. Note that width refers to the dimension in the lateral direction.

[0036] Furthermore, a region that is open in the vertical direction is formed between the pair of inclined portions 3010, and this region extends straight along the front-to-back direction.

[0037] As shown in Figure 8, the tank flow straightening section 302 has a longitudinal flow straightening section 3020 extending along the front-rear direction and a transverse flow straightening section 3021 extending along the width direction.

[0038] The longitudinal rectifier section 3020 is positioned above the space formed between the pair of inclined sections 3010. One end of the longitudinal rectifier section 3020 is fixed to the front surface 3003, and the other end of the longitudinal rectifier section 3020 is fixed to the back surface 3004. The longitudinal rectifier section 3020 is shaped like a mountain. More specifically, the longitudinal rectifier section 3020 is inclined so as to gradually slope downward from the central part in the lateral direction towards the outer end in the lateral direction.

[0039] Furthermore, the lower end of the vertical flow straightening section 3020 is positioned away from the pair of inclined sections 3010 in the upward direction. As a result, a region through which the transported material can pass is formed between the vertical flow straightening section 3020 and the pair of inclined sections 3010.

[0040] The lateral flow straightening section 3021 is positioned at an upward distance from the longitudinal flow straightening section 3020. One end of the lateral flow straightening section 3021 in the longitudinal direction is fixed to one inclined section 3010, and the other end of the lateral flow straightening section 3021 in the longitudinal direction is fixed to the other inclined section 3010. The lateral flow straightening section 3021 is formed in a curved shape. More specifically, the lateral flow straightening section 3021 is inclined so that it gradually slopes downward from the central part in the front-rear direction towards the outer end in the front-rear direction.

[0041] As shown in Figure 7, the tank mounting section 303 has a pair of vertical wall sections 3030 that extend downward from the lower ends of different inclined sections 3010. The pair of vertical wall sections 3030 are positioned far apart from each other in the lateral direction. Therefore, a space is formed between the pair of vertical wall sections 3030.

[0042] As shown in Figure 9, the transport device 31 includes a transport belt section 310, a transport drive section 311 for rotating the belt, and a transport base section 312 erected on the cross member 211 and to which the belt and drive section are attached.

[0043] The transport belt section 310 is an endless annular shape. The transport belt section 310 is arranged to extend along the front-rear direction and is positioned between a pair of upright wall sections 3030. Therefore, the transport belt section 310 is positioned inward from the pair of inclined sections 3010 in the lateral direction. In addition, the transport belt section 310 is positioned away from the branch section of the tank 30 in the downward direction.

[0044] Furthermore, the rear end of the transport belt section 310 extends to the outside of the tank 30 through an opening in the rear surface 3004 of the tank 30 and is located inside the housing section.

[0045] The transport drive unit 311 includes a pair of rollers 3110 arranged at intervals in the front-rear direction, and a drive source 3111 for rotating the pair of rollers 3110.

[0046] The pair of rollers 3110 are configured to rotate around a rotation axis that extends along the width direction. One of the rollers 3110 is located inside the tank 30, and the other roller 3110 is located inside the housing.

[0047] As shown in Figure 7, the transport base section 312 has a pair of base wall sections 3120 that extend along the front-rear direction and are erected on the cross member 211. The pair of base wall sections 3120 face each other while being spaced apart in the lateral direction. The rear ends of the pair of base wall sections 3120 extend beyond the tank 30 through the opening of the tank 30 and are located inside the cover, which will be described later. The rotation axes of the pair of rollers 3110 are attached to the pair of base wall sections 3120.

[0048] As shown in Figure 10, the second body B2 includes a housing section 33 arranged in a line on the rear side of the tank 30, a cover 34, a chute 35 located inside the housing section 33 into which the transported material carried out from the tank 30 by the transport device 31 is fed, a transport device 36 that sends out the transported material that has passed through the chute 35, and a transport device 37 that transports the transported material sent out from the transport device 36 to a location separate from the special vehicle 1. The second body B2 corresponds to, for example, a "second cargo box (low cargo box)".

[0049] The housing section 33 is positioned away from the tank 30 in the rearward direction.

[0050] The cover 34 functions as a conveyor enclosure that covers the rear end of the conveying device 31 (belt conveyor). The cover 34 has an upper wall 340 which is the upper wall, a rear wall 341 which is the rear wall, and side walls 342 which are the lateral walls.

[0051] A space is formed in the chute 35 that penetrates vertically. The upper end of the chute 35 is connected to the lower end of the cover 34 by bolts (not shown). The upper wall 340 of the cover 34 is positioned above the chute 35.

[0052] The dispensing device 36 is a so-called rotary valve. Therefore, as shown in Figure 11, the dispensing device 36 includes an input section 360 into which the material to be transported is fed through the chute 35, a valve case 361 into which the material to be transported flows from the input section 360, a valve body 362 located inside the valve case 361, a discharge section 363 that discharges the material sent out from the valve case 361 by the valve body 362 to the outside of the dispensing device 36, and a rotary drive unit 364 that rotates the valve body 362.

[0053] The input section 360 is formed in a shape that is narrower at the bottom than at the top. The valve body 362 has a shaft fixing section 3620 to which a rotating shaft (a drive shaft described later) extending in the front-rear direction is fixed, and a plurality of vane sections 3621 that extend outward from the shaft fixing section 3620 along the radial direction of the rotating shaft.

[0054] As shown in Figure 10, the rotary drive unit 364 includes a drive shaft 3640 which is the rotation center of the valve body 362, and a drive source 3641 which rotates the drive shaft 3640.

[0055] The drive shaft 3640 extends along the front-rear direction and is fixed to the shaft fixing portion 3620 of the valve body 362.

[0056] The drive source 3641 is positioned away from the valve case 361 in the rearward direction. Therefore, the rotary drive unit 364 and the valve case 361 are aligned in the front-to-back direction.

[0057] The transfer device 37 is configured to transfer the material using air. As shown in Figures 10 and 12, the transfer device 37 includes a multiphase unit 370, an air supply unit 371, an air supply section 372, a discharge section 373, and an exhaust section 374.

[0058] The multiphase unit 370 receives the transported material discharged from the discharge section 363 and the air used for transport. The multiphase unit 370 has a transported material supply section 3700 and a flow section 3701.

[0059] The material supply unit 3700 is attached to the discharge unit 363. The material supply unit 3700 is supplied with material discharged from the discharge unit 363.

[0060] The distribution unit 3701 is supplied with air. Specifically, the distribution unit 3701 is supplied with air from the air supply device 371 via the air supply unit 372. The distribution unit 3701 distributes the transported material and air in a mixed state. The distribution unit 3701 then sends out the transported material via the discharge unit 373.

[0061] As shown in Figure 12, the special vehicle 1 transports the granular material and then, for example, transports the material (granular material) to a silo S. The silo S has an inlet pipe S1 for introducing the material along with air into the silo S, and an outlet pipe S2 for releasing air and dust from the silo S. The inlet pipe S1 is connected to the material supply unit 3700 via a hose h1.

[0062] The air and dust inside the silo S are sent from the outlet pipe S2 through the hose h2 to the exhaust section 374. The exhaust section 374 has an exhaust blower 376. The exhaust blower 376 sends the air inside the silo S to a bag filter 375, collects the dust in the air, and then releases it to the outside. The bag filter 375 is a dust collector that collects dust using a filter bag, which is a filter cloth.

[0063] Next, the second structure B2 will be described further with reference to Figures 2 and 3. The second structure B2 is positioned adjacent to the rear side of the first structure B1. As shown in Figures 2 and 3, the second structure B2 has a housing portion 33 and a fence portion 38.

[0064] The housing portion 33 forms a volume chamber of a predetermined capacity. The housing portion 33 houses, for example, an exhaust blower 376 and a bag filter 375 (see Figure 12). The housing portion 33 has an upper wall portion 330, a side wall portion 331, a front surface 332, and a rear surface 333.

[0065] The upper wall portion 330 is the ceiling wall of the housing portion 33 located above. The upper wall portion 330 is formed in a substantially rectangular shape and has a substantially horizontal surface on which an operator can work. This upper wall portion 330 is located at a lower height than the upper wall portion 3000 (see Figure 7) of the tank input portion 300. The upper wall portion 330 has a first recess 3301.

[0066] The first recess 3301 is a recess that is recessed downwards on the chassis frame 21 side. The bottom surface of the first recess 3301 constitutes a floor (scaffolding) for workers to work at an elevated position. The first recess 3301 is formed on the front and right end sides of the upper wall portion 330 and is rectangular in shape when viewed from above. As a result, a worker standing on the first recess 3301 is close to the handle 3007 of the opening door 3006 of the tank loading section 300, and can therefore work on the opening 3005 of the tank loading section 300.

[0067] A fence section 38 is provided around the first recess 3301. The fence section 38 is fixed to the upper wall section 330 other than the first recess 3301 and extends upward from the upper wall section 330. The fence section 38 is composed of, for example, pipe members extending in the vertical direction corresponding to the column section, and pipe members extending in the front-rear direction and pipe members extending in the lateral direction corresponding to the handrail section. In a plan view, this fence section 38 is arranged continuously between the first recess 3301 and the left side wall section 331, and between the first recess 3301 and the back surface 333.

[0068] The side walls 331 are formed in a substantially rectangular shape and are provided in pairs, one on the left and one on the right. The left side wall 331 is formed to be openable and closable and covers various operating parts (not shown). The right side wall 331 has a second recess 3310 and a third recess 3311.

[0069] The second recess 3310 is recessed inward from the second mounting structure B2 and extends vertically. Specifically, the second recess 3310 is recessed to the left and extends from the main frame 210 (see Figure 4) to the upper wall portion 330. Since this second recess 3310 is formed in the front half of the right side wall portion 331, its upper end is connected to the first recess 3301. The second recess 3310 has a ladder 39.

[0070] The ladder 39 has horizontal bars 390. The horizontal bars 390 extend horizontally and are installed in multiples vertically at equal intervals. For example, four horizontal bars 390 are provided. The horizontal bars 390 are spaced a predetermined distance to the right from the vertical wall 334 of the second recess 3310. This makes it easier for workers to place their toes and climb the ladder 39.

[0071] The third recess 3311 is located below the second recess 3310 and on the underside of the main frame 210 (see Figure 4). The lowest horizontal rail 390 of the ladder 39 is located on the upper side of the main frame 210, making it difficult for a worker to climb onto the first recess 3301. However, a worker can easily climb onto the first recess 3301 by first placing their feet on the third recess 3311 and then on the horizontal rail 390.

[0072] As described above, according to the configuration of this embodiment, by forming a partially lower first recess 3301 in the upper wall portion 330, a worker's footing can be secured within the first recess 3301, improving workability at an upper position. Since a worker's footing is secured within the first recess 3301, the height of the area other than the first recess 3301 can be raised, protecting the worker from the area other than the first recess 3301 and improving safety. Furthermore, since the area other than the first recess 3301 protrudes upward, the storage volume of the second structure B2 can be secured in the area other than the part required as a worker's footing, improving the storage capacity of the second structure B2. Moreover, since the first recess 3301 is formed on the front and right end side of the upper wall portion 330 near the opening and closing door 3006, work can be easily performed on the upper opening of the tank loading section 300.

[0073] The upper wall portion 330 is provided with a fence portion 38 that extends upward from at least a portion of the periphery of the first recess 3301. With this configuration, since the height position of the area other than the first recess 3301 is higher than the bottom surface of the first recess 3301, the height position of the top of the fence portion 38 can be increased while keeping the vertical dimension of the fence portion 38 down. Therefore, the safety of workers can be ensured while miniaturizing the fence portion 38.

[0074] The structure 3 comprises a second structure B2 and a first structure B1 adjacent to the second structure B2. The upper wall portion 3000 of the first structure B1 is located higher than the upper wall portion 330 of the second structure B2, and the second structure B2 has a first recess 3301. With this configuration, since the second structure B2, which is lower than the first structure B1, has the first recess 3301, the first structure B1 (back surface 3004) acts as a protective wall for workers standing on the first recess 3301. Because the first structure B1 acts as a protective wall, the fence portion 38 on the side of the lower second structure B2 adjacent to the higher first structure B1 can be omitted. Even if the fence portion 38 is provided, it can be made lower by the height of the protective wall.

[0075] Furthermore, the special vehicle 1 comprises a chassis frame 21 and a second body B2 mounted on the chassis frame 21 and having side walls 331. The right side wall 331 has a second recess 3310 that is recessed inward into the second body B2 and extends vertically, and the second recess 3310 has a plurality of horizontal rails 390 that extend horizontally and constitute a ladder 39. With this configuration, the second recess 3310 of the side wall 331 has a plurality of horizontal rails 390 that extend horizontally and constitute a ladder 39, so only the portion necessary for the construction of the ladder 39 is recessed. In other words, the portion of the side wall 331 other than the second recess 3310 protrudes outward, so various items such as bag filters can be stored. In other words, the ladder 39 can be embedded in the side wall 331 without significantly impairing the storage capacity of the second body B2.

[0076] Next, a modified version of the special vehicle 1 will be described with reference to Figure 13. Figure 13 is a side view of the modified special vehicle 1A. In this modified version, the main difference from this embodiment is that the position of the fence section 38 is not constant, but switches between a retracted position and an unfolded position. The differences between this modified version and this embodiment will be explained below. Note that the modified version described below is basically the same as the embodiment described above, so the same parts are denoted by the same reference numerals and detailed explanations are omitted.

[0077] Special vehicle 1A has a second body B2, and the second body B2 has a fence section 38.

[0078] The fence section 38 is supported by the upper wall section 330 other than the first recess 3301 and extends upward. The fence section 38 is made of, for example, pipe material and is formed continuously between the first recess 3301 and the left side wall section 331, and between the first recess 3301 and the back surface 333. As shown in Figure 13, the fence section 38 has a hinge section 381 and a movable fence section 382.

[0079] The hinge portion 381 is rotatable around a horizontal axis. Specifically, the hinge portion 381 is composed of a hinge that can rotate around an axis extending in the width direction. The hinge portion 381 is supported by a horizontal portion (handrail portion) that extends continuously in the width direction between the first recess 3301 and the back surface 333.

[0080] The movable fence section 382 is attached to the hinge section 381. The movable fence section 382 is configured to rotate vertically around the hinge section 381, allowing it to be changed between a retracted position and an unfolded position. As shown by the solid line in Figure 13, the retracted position is when the tip is located below the hinge section 381. As shown by the dashed line in Figure 13, the unfolded position is when the tip is located above the hinge section 381. The movable fence section 382 is composed of, for example, multiple pipe members that extend vertically in the retracted position and pipe members that extend horizontally.

[0081] With the above configuration, the movable fence section 382 can be changed between a retracted position and an extended position. Therefore, the movable fence section 382 can be in the retracted position when traveling and in the extended position when working. Consequently, since the movable fence section 382 can be in the retracted position when traveling and in the extended position when working, a fence section 38 can be obtained that does not hinder travel while ensuring the safety of the worker.

[0082] (1) In this embodiment, a powder and granular material transport vehicle is given as an example of a special-purpose vehicle 1, but the disclosure is not limited thereto. It may also be a van, a wing van, a tank truck, or a refuse collection vehicle. In a wing van, the high cargo box is the main storage area, and the low cargo box is the storage area between the cab and the main storage area. In a tank truck, the high cargo box is the liquid storage tank, and the low cargo box is a box positioned next to the liquid storage tank. In a refuse collection vehicle, the high cargo box is the refuse collection box, and the low cargo box is a box positioned between the cab and the refuse collection box.

[0083] (2) In this embodiment, the first frame B1, which is a high cargo box, and the second frame B2, which is a low cargo box, were separate cargo boxes, but the disclosure is not limited thereto. The high cargo box and the low cargo box may be integrated or connected. In this case, the first recess is formed in the ceiling wall of the low cargo box.

[0084] (3) In this embodiment, the first recess 3301 was formed on the front and right end portion of the upper wall portion 330, but the disclosure is not limited thereto. It is sufficient that it contributes to workability, and it may be any part on the front end portion of the upper wall portion 330. Also, if the work object is the rear side of the second mounting B2, the first recess 3301 may be formed on the rear end portion of the upper wall portion 330.

[0085] (4) In this embodiment, the second recess 3310 was located on the right side wall portion 331, but the disclosure is not limited thereto. At the very least, it is sufficient that the worker can reach the first recess 3301, and it is also possible to have it located on the left side wall portion 331.

[0086] (5) In this embodiment, an example in which the fence section 38 is made of pipe material has been described, but the disclosure is not limited thereto. At the very least, it is sufficient to ensure the safety of workers, and the fence section 38 can be made of any material such as board material or rod material. [Explanation of Symbols]

[0087] 1, 1A…Special vehicle, 2…Vehicle, 3…Mounting (cargo box), 20…Driver's cab, 21…Chassis frame, 30…Tank, 31…Transportation device, 33…Housing section, 34…Cover, 35…Cute, 36…Discharge device, 37…Transfer device, 38…Fence section, 39…Ladder, 210…Main frame, 211…Cross member, 300…Tank loading section, 301…Tank guide section, 302…Tank flow straightening section, 303…Tank erection section, 310…Transportation belt section, 311…Transportation drive section, 312…Transportation base section, 330…Upper wall section (ceiling wall), 331…Side wall section (side wall), 332…Front, 333…Rear, 334…Vertical wall, 340…Upper wall, 341…Rear wall, 342…Side wall, 360…Loading section, 361…Valve case, 362…Valve Main body, 363…Discharge section, 364…Rotating drive section, 370…Mixer, 381…Hinge section, 382…Movable fence section, 390…Horizontal rail, 3000…Upper wall section, 3001…Side wall section, 3002…Lower wall section, 3003…Front, 3004…Rear, 3005…Opening, 3006…Opening / closing door, 3007…Handle, 3010…Inclined section, 3020…Vertical rectifier section, 3021…Horizontal 3030...Rectifying section, 3110...Upright wall section, 3110...Roller, 3111...Drive source, 3120...Base wall section, 3301...First recess, 3310...Second recess, 3620...Shaft fixing section, 3621...Blade section, 3640...Drive shaft, 3641...Drive source, 3700...Material supply section, 3701...Distribution section, B1...First frame (first cargo box), B2...Second frame (second cargo box)

Claims

1. Chassis frame and A cargo box mounted on the chassis frame and having a ceiling wall from which a worker positioned above can work, Equipped with, The aforementioned ceiling wall has a first recess that is recessed toward the chassis frame side, in a specially equipped vehicle.

2. The special vehicle according to claim 1, further comprising a railing portion extending upward from at least a portion of the periphery of the first recess in the ceiling wall.

3. The aforementioned cargo box comprises a first cargo box and a second cargo box adjacent to the first cargo box. The ceiling wall of the first cargo box is located at a higher position than the ceiling wall of the second cargo box. The special-purpose vehicle according to claim 1 or claim 2, wherein the second cargo box has the first recess.

4. The aforementioned fence section is A hinge section that can rotate around a horizontal axis, A movable fence section attached to the hinge section, which can be changed between a retracted position in which the tip is located downwards and an extended position in which the tip is located higher than the position in the retracted position, A special vehicle according to claim 2, having the following features.

5. Chassis frame and A cargo box having side walls is mounted on the chassis frame, Equipped with, The side wall has a second recess that is recessed inward into the cargo box and extends vertically, The second recess has a plurality of horizontal rails that extend horizontally and form a ladder, a specially equipped vehicle.

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