JP4881173B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle equipped with a power generation device that uses an internal combustion engine as a power source, and more particularly, to discharge exhaust gas such as combustion gas and temperature rising gas generated by operation of the internal combustion engine of the power generation device to the outside of the vehicle. Related to the structure.

  A typical prior art is described in Patent Document 1, for example. In this conventional technique, since the air passing through the radiator is provided with a muffler so as to block the exhaust passage, the ventilation of the space in the power generator package in which the power generator is accommodated is pushed by the exhaust air of the radiator unit. In order to prevent the exhaust air from the radiator unit from being discharged without interference and to prevent the cooling of the muffler and the ventilation in the power generation device package from being suppressed, the internal combustion engine and the power The high-temperature exhaust gas generated from the internal combustion engine is guided to the muffler through the duct and discharged from the exhaust port to the outside. In addition, outside air is sucked from the suction port by a fan provided in the radiator unit, water heated inside the internal combustion engine is circulated, cooled by the radiator, and the air that has passed through the radiator is exhausted below the partition wall. Then, the air is led to the space where the muffler is provided through the ventilation opening of the partition wall, and is discharged to the outside from the exhaust port.

  In such a prior art, in order to prevent the exhaust air of the radiator unit from being exhausted without interference and suppressing the cooling of the muffler and the ventilation in the power generation device package, A partition wall is provided on the partition wall, and a muffler is installed on the partition wall. The partition wall is provided with a vent so that the exhaust air from the radiator unit facilitates cooling of the muffler and ventilation of the duct.

  The heat generated in the power generation apparatus is cooled by the radiator unit using water as a medium, and on the other hand, the cool air sucked from the intake port is guided into the package and discharged through the duct. Heat generated from the surface of the muffler is discharged to the outside through the air vent of the partition wall by the exhaust air of the radiator unit, and thus the combustion gas and the temperature rising gas of the internal combustion engine provided as a power source in the power generation device are discharged outside the vehicle. It is discharging.

Japanese Utility Model Publication No. 56-86854

  In the prior art, an exhaust section for guiding exhaust air that has passed through the radiator unit is provided below the partition wall, a ventilation opening is provided in the partition wall, a muffler is provided on the partition wall, and heat of the muffler is transferred from the radiator unit to the It collects by the exhaust air led through the ventilation port, and is configured to exhaust the exhaust air after the heat recovery from the exhaust port to the outside of the vehicle.

  In such a configuration, the operating sound of the internal combustion engine is guided to the space in which the muffler is accommodated via the duct and discharged to the outside from the exhaust port, and the blowing sound of the radiator unit is transmitted to the exhaust section and the partition wall. The exhaust is led to the space where the muffler is provided and discharged from the exhaust port to the outside of the vehicle, so that the operation sound of the internal combustion engine and the blowing sound of the radiator unit are emitted to the outside, and a large noise is generated outside. There is a problem.

  The objective of this invention is providing the work vehicle which can reduce the noise by driving | operation of an electric power generating apparatus, and can exhaust and exhaust heat.

In the present invention, a power generation device that drives a generator by an internal combustion engine is mounted in a cargo box installed on a loading platform of a vehicle body, and exhaust generated from the power generation device is guided from the power generation device to the outside of the cargo box. exhaust guide means for discharging Te is provided,
The exhaust induction means includes a combustion gas induction pipe that guides the combustion gas of the internal combustion engine to the outside of the packing box, and a temperature rising gas induction pipe that guides the temperature rising gas heated by the internal combustion engine to the outside of the packing box. Including
The cargo box has a front wall facing the forward direction of the vehicle, a right side wall that extends rearward from the right edge of the front wall, and a left wall that continues rearward from the left edge of the front wall,
One end of the temperature rising gas induction pipe is connected to the power generator, and the other end of the temperature rising gas induction pipe is connected to the front wall,
A portion of the front wall to which the other end of the temperature rising gas induction pipe is connected is formed with a through hole communicating with the temperature rising gas induction pipe.
This through-hole is a work vehicle characterized in that it is covered with a cover body that protrudes forward from the front wall and opens downward .

  According to the present invention, a power generation device that drives a generator by an internal combustion engine is mounted on a cargo box of a work vehicle, and power for moving to a site and operating various work machines can be supplied. Since the power generation device mounted in the packing box is configured to drive the generator by the internal combustion engine, when the power generation device is operated, combustion gas and temperature rising gas are generated from the internal combustion engine. Since the exhaust gas such as the combustion gas and the temperature rising gas is guided from the power generation device to the outside of the packing box by the exhaust guiding means, the air in the packing box is prevented from being polluted by the combustion gas, and the temperature rising is also performed. The air in the packing box is prevented from being heated to a high temperature by the gas, and the environmental atmosphere in the packing box is prevented from being lowered.

  Even if the power generator is operated in this way, the environment in the packing box does not deteriorate, so it can be operated with the power generator mounted in the packing box, and the power generator is lifted and lowered to the packing box on site. Is eliminated, and labor and time for lifting and lowering the power generation apparatus can be reduced, and work efficiency can be improved. In addition, since the exhaust of the power generation device is guided to the outside of the cargo box by the exhaust induction means, it is not necessary to keep the door provided in the cargo box open for ventilation when operating the power generation device. The operation sound of the device is blocked by the packing box, the release of the operation sound to the outside is prevented, and the noise is suppressed.

Further , according to the present invention, the combustion gas of the internal combustion engine is guided to the outside of the packing box by the combustion gas induction pipe, and the temperature rising gas heated by the internal combustion engine is guided by the temperature rising gas induction pipe. Therefore, ambient air is heated by combustion gas containing particulate matter such as graphite (Particulate Matter; abbreviated PM), nitrogen oxides (abbreviated as NOx) and environmental pollutants such as unburned material, and heat generated by the internal combustion engine. The heated gas is separated and released from the packing box to the outside without mixing.

As a result, a part of the combustion gas enters the inside of the temperature rising gas discharge port of the power generation device, and the particulate matter contained in the combustion gas adheres to the generator and other devices. It is possible to prevent the power generation apparatus from being damaged due to this. In addition, the combustion gas and the temperature rising gas are separately discharged by the combustion gas induction tube and the temperature rising gas induction tube, so that the combustion gas induction tube and the temperature rising gas induction tube are connected to each property of the combustion gas and the temperature rising gas. In other words, it is possible to individually select materials and structures suitable for the gas temperature, flow rate and components, etc., and to realize highly resistant pipelines for each gas component, and to ensure reliable exhaust without gas leakage. Emissions can be achieved in the long term.
Further, the temperature rising gas generated in the power generation device is guided from one end of the temperature rising gas guiding pipe to the other end, and is discharged to the outside through a through hole formed in the front wall of the cargo box. Since the cover body covers the through hole forward from the front wall and opens downward, the temperature rising gas released from the through hole passes through the space opened downward between the front wall and the cover body. Is discharged through. Since the cover body is configured to cover the through-hole in a state where the cover body is opened downward, it is possible to prevent wind and rain and foreign matter from entering the heated gas guide pipe from above and from the front. Further, since the cover body is provided on the front wall, the air temperature or the wind pressure during traveling of the vehicle directly acts on the temperature rising gas discharged from the opening at the other end of the through hole and the temperature rising gas guiding pipe, so that the temperature rising gas Is prevented from being hindered, and the temperature rising gas can be discharged smoothly.

  Furthermore, the present invention is characterized in that the combustion gas guide pipe is inserted into the temperature rising gas guide pipe from a loading device to a cargo box.

  According to the present invention, since the combustion gas guide pipe is inserted into the temperature rising gas guide pipe, there is no need for a space for disposing the combustion gas guide pipe in the packing box, and the exhaust guide means in the packing box. Occupied space can be reduced.

  According to the present invention, by providing the exhaust guide means in the cargo box of the work vehicle, the combustion gas generated from the power generation device is discharged to the outside of the cargo box, and the air in the cargo box is polluted by the combustion gas of the internal combustion engine. The temperature rise by the temperature rising gas can be suppressed, and the environment inside the packing box can be maintained well.

Further, according to the present invention, the combustion gas discharged from the combustion chamber of the internal combustion engine and the temperature rising gas heated by the heat generated by the internal combustion engine by the combustion gas induction tube and the temperature rising gas induction tube Because it can be discharged separately outside the generator, it prevents the occurrence of failure due to the mixing of combustion gas in the power generation device, suppresses the deterioration of the combustion gas induction tube and the temperature rising gas induction tube, and from the highly reliable power generation device It is possible to realize exhaust emission.
In addition, a through hole is formed in the front wall of the packing box, and the other end of the temperature rising gas induction pipe is connected, and the through hole is covered by the cover body. It is possible to prevent the temperature rising gas discharged through the through holes from being reduced, and to reduce the action of airflow or wind pressure from the front, thereby realizing smooth discharge of the temperature rising gas.

  Further, according to the present invention, the combustion gas guide pipe is inserted into the temperature rising gas guide pipe, so that a space for arranging the combustion gas guide pipe in the packing box is unnecessary, and the exhaust gas is exhausted in the packing box. By reducing the space occupied by the guiding means, it is possible to suppress a decrease in the effective use space that can be used for loading various devices and equipment.

  FIG. 1 is a partial cross-sectional view illustrating a work vehicle 1 according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of an exhaust guide unit 2. In the work vehicle 1 of the present embodiment, a power generation device 6 that drives a generator by an internal combustion engine is mounted in a cargo box 5 installed on a loading platform 4 of a vehicle body 3, and exhaust generated from the power generation device 6 is exhausted. Exhaust induction means 2 is provided that guides the power generation device 6 to the outside of the packing box 5 and discharges it.

  The cargo box 5 includes a front wall 10 facing the forward direction A of the work vehicle 1, a right side wall 11 continuing rearward from the right edge of the front wall 10, and a left side wall 12 continuing rearward from the left edge of the front wall 10. A rear wall 13 (see FIG. 3 to be described later) that continues to the rear right edge of the right wall 11 and the rear left edge of the left wall 12, and the front wall 10, the right wall 11, the left wall 12, and the rear It has a ceiling wall 14 connected to each upper edge portion of the wall 13 and a floor 15 connected to each lower edge portion of the front wall 10, the right side wall 11, the left side wall 12 and the rear wall 13.

  The front wall 10, the right side wall 11, the left side wall 12, and the rear wall 13 stand up perpendicularly to a substantially horizontal bottom 15, and the right side wall 11 and the left side wall 12 are connected at right angles to the front wall 10. 13 is parallel to the front wall 10, and the top wall 14 is parallel to the bottom 15. These front wall 10, right side wall 11, left side wall 12 and rear wall 13 are realized by a panel in which a decorative plywood is lined on the inner surface of an outer plate made of a lightweight metal such as duralumin and an aluminum alloy. The bottom 15 is made of compression plywood, and is fixed to the loading platform 4 of the vehicle main body 3 with bolts and nuts. The power generation device 6 is mounted on the bottom 15 in proximity to the front wall 10.

  The exhaust induction means 2 guides the combustion gas induction pipe 20 that guides the combustion gas of the internal combustion engine 25 to the outside of the packing box 5 and the temperature rising gas heated by the internal combustion engine 25 to the outside of the packing box 5. And a temperature rising gas guide tube 21.

  The power generation device 6 includes a hollow, substantially rectangular parallelepiped housing 23, a generator 24 accommodated in the housing 23, and an internal combustion engine 25 accommodated in the housing 23 and driving the generator 24. The generator 24 is realized by, for example, a brushless rotating field synchronous generator. The internal combustion engine 25 is realized by a four-cycle water-cooled diesel engine, for example.

  An operation panel 26, a fuel level gauge 27, and a handle 28 are provided on one side of the power generator 6. In the upper part of the power generator 6, a fuel filler port 29 and a hanging hook member 30 are provided in the center, and an exhaust port 31, an exhaust port 32, and a radiator water supply port 33 are provided near one end in the longitudinal direction of the upper part. . Further, a door 34, an air inlet 35, a fuel drain 36, a cooling water drain 37 and an engine oil drain 38 are provided on the front portion of the power generation device 6.

  Combustion gas is led from the internal combustion engine 25 to the exhaust port 31, and a temperature rising gas recovered through heat exchange with the cooling water through the radiator of the internal combustion engine 25 is led to the exhaust port 32.

  The combustion gas guide pipe 20 is inserted into the temperature rising gas guide pipe 21 from the exhaust port 31 of the power generator 6 to the vicinity of the upper portion of the front wall 10 of the cargo box 5. One end of the temperature rising gas induction pipe 21 is connected to the exhaust port 32 of the power generator 6, and the other end of the temperature rising gas induction pipe 21 is a rectangular parallelepiped duct 40 provided on the inner surface of the front wall 10. Connected to.

  A portion of the front wall 10 to which the other end portion of the temperature rising gas induction pipe 21 is connected, that is, the duct 40 is in a fixed position, and communicates with the temperature rising gas induction pipe 21 via a space 41 in the duct 40. A through hole 42 is formed, and the through hole 42 is covered with a cover body 43 that protrudes from the front wall 10 in the forward direction A and opens downward.

  As described above, the combustion gas guide pipe 20 is inserted substantially coaxially through the combustion gas guide pipe 21, protrudes from the front wall 10 through the duct 40, and bends at right angles in the horizontal direction within the cover body 43. And protrudes laterally from the cover body 43.

  The combustion gas guide pipe 20 has a first guide pipe 20a extending straight from the exhaust port 31 to the inside of the duct 40, and a first bent pipe connected to the upper end of the first guide pipe 20a and bent at a right angle. One end portion of the two guide pipes 20b and the second guide pipe 20b in the duct 40 are connected, and the straight third guide pipe 20c is inserted through the through hole 42 of the front wall 10 and protrudes from the front wall 10 to the outside. And the other end of the third guide tube 20c in the cover body 43, connected to the other end of the fourth guide tube 20d, which is a bent tube bent at a right angle, and the other end of the cover body 43. A fifth guide pipe 20e that protrudes from the cover body 43 to one side and extends in a straight line.

  These first to fifth guide pipes 20a to 20e are made of a heat-resistant alloy such as a nickel-chromium alloy, and are realized by a steel pipe having an outer diameter of 34 mm and a thickness of 3.2 mm. The temperature rising gas guide tube 21 is made of, for example, an aluminum alloy and is realized by a bellows tube having an outer diameter of 300 mm. By using such a bellows tube, a large heat radiation area can be secured, the amount of heat transfer to the duct 40 and the front wall 10 can be reduced, and the duct 40 and the front wall 10 are prevented from being heated. Can be removed.

  Since the combustion gas guide pipe 20 is made of a steel pipe, durability against corrosion caused by contact between the combustion gas guide pipe 20 and high-temperature exhaust gas can be improved.

  In addition, since such a combustion gas guide pipe 20 is inserted into the temperature rising gas induction pipe 21 with an interval, heat radiated from the combustion gas induction pipe 20 heated by the high temperature exhaust gas is The temperature rising gas passing between the temperature rising gas induction pipe 21 and the combustion gas induction pipe 20 can be recovered and insulated. This prevents the heat in the combustion gas guide tube 20 from being transferred to the air in the packing box 5 to heat the air in the packing box 5, and the operation of the power generation device 6 reduces the ambient temperature in the packing box 5. This prevents the working environment from being lowered.

  The duct 40 has a substantially hollow rectangular parallelepiped shape and is made of, for example, an aluminum alloy, and includes a top plate 40a, a bottom plate 40b, and first to fourth side plates 40c to 40f. Since the top plate 40a is heated by contact with the temperature rising gas discharged from the temperature rising gas induction tube 21, it is disposed close to the bottom wall 14 of the cargo box 5 with a slight space ΔL. An air gap 46 is interposed between the top wall 14 and the top plate 40a so as not to contact the top wall 14, and the duct 40 prevents the top wall 14 from being heated. The interval ΔL is selected from 30 mm to 100 mm, for example.

  At the four peripheral edges of the top plate 40a, upper ends of the first to fourth side plates 40c to 40f are connected at right angles, and at the lower ends of the first to fourth side plates 40c to 40f, there are four bottom plates 40b. Peripheries are connected at right angles. The bottom plate 40b and the top plate 40a are parallel, the first side plate 40c and the third side plate 40e facing each other are parallel, and the second side plate 40d and the fourth side plate 40f are parallel.

  A circular gas inflow hole 46 is formed in the bottom plate 40 b, and one end of the temperature rising gas induction pipe 21 is airtightly connected to the peripheral edge of the gas inflow hole 46, and the inside of the temperature rising gas induction pipe 21 rises. The rising temperature gas flows into the space 41 in the duct 40 through the gas inflow hole 46.

  The third side plate 40 e is fixed to the front wall 10 by a bracket 47 so as to cover the through hole 42. The bracket 47 is made of, for example, L-shaped steel, and the web is fixed to the peripheral edge of the front wall 10 facing the through hole 42 by a plurality of screws 48. The third side plate 40e is fixed by screws 49. A gas outflow hole 50 is formed in the third side plate 40 e, and a peripheral portion of the gas outflow hole 50 is fixed to the flange of the bracket 47 by a plurality of screws 49. The temperature rising gas that has flowed into the space 41 in the duct 40 from the temperature rising gas guide pipe 21 flows out from the gas outflow hole 50, is led into the cover body 43 through the through hole 42, and is lowered from the opening of the cover body 43. Is discharged.

  Both ends of a U-shaped holding metal fitting 51 are fixed to the bracket 47 by nuts 52. Both ends of the holding metal fitting 51 are provided with external screws into which the nuts 52 are screwed. The nuts 52 are tightened in a state where the third induction pipes 20e of the combustion gas induction pipes 20 are inserted. The pipe 20 e is positioned substantially on the center axis line of the through hole 42 and the gas outflow hole 50 and fastened to the bracket 47.

  The cover body 43 includes a ceiling portion 43a, a front plate portion 43b, a pair of side plate portions 43c and 43d, and three inwardly bent portions 43e, 43f, and 43g. The ceiling portion 43a is close to the upper side of the through hole 42 and protrudes substantially horizontally from the front wall 10 in the forward direction A, and is connected to the free end portion farthest from the front wall 10 in the forward direction A. 43b is formed. The front plate portion 43 b is inclined in the forward direction A as it goes downward, and forms the opening between the lower end portion and the front wall 10.

  One side plate portion 43c is connected to one side of the ceiling portion 43a downward at a right angle, and the other side plate portion 43d is connected to the other side portion of the ceiling portion 43a downward at a right angle. The side plate portions 43c and 43d are parallel to each other, and an exhaust space 53 opened to the atmosphere through the opening is formed between the side plate portions 43c and 43d and between the front wall 10 and the front plate portion 43b. The temperature rising gas is discharged from the duct 40 into the exhaust space 53 and diffused to the atmosphere. Further, the fifth guide pipe 20e protrudes through a hole formed in the other side plate portion 43d, discharges the combustion gas outward from the right side wall 11, and includes carbon contained in the exhaust gas of the right side wall 11. It prevents fouling due to adhesion of particulate matter (abbreviated as PM).

  Such a cover body 43 is arranged so that the inner bent portions 43e, 43f, 43g surround the through hole 42, and the inner bent portions 43e, 43f, 43g are formed on the front wall 10 by a plurality of screws 54. It is fixed and prevents intrusion of wind and rain and dust into the through hole 42.

  FIG. 3 is a cross-sectional view showing the configuration of the gas induction cover 60. One end portions of the combustion gas induction pipe 20 and the temperature rising gas induction pipe 21 arranged on the power generation device 6 side are individually connected to the exhaust port 31 and the exhaust port 32 by a gas induction cover 60.

  The gas induction cover 60 is provided in the housing 23 so as to be airtightly detachable so as to surround the exhaust port 31 and the exhaust port 32, and is integrally formed with the cover body 61 and the cover body 61 having a reverse concave cross section. A straight cylindrical first pipe joint 62 to which one end portion of the combustion gas guide pipe 20 is connected, and a hollow box-like combustion gas guide body 63 extending from the central axis to the peripheral edge along a pair of diagonal lines in the cover body 61. And a second pipe joint 64 integrally formed on the combustion gas guide 63 on the central axis and connected to one end of the temperature rising gas guide pipe 21. The combustion gas guide 63 is fixed to the inner surface of the cover body 61 by, for example, welding.

  An exhaust pipe 66 extending from the internal combustion engine 25 accommodated in the power generation device 6 is connected to the exhaust port 31 provided in the housing 23, and combustion gas discharged from the exhaust pipe 66 passes through the exhaust port 31 to a combustion gas guide body. Then, the air is guided into the combustion gas guide pipe 20 through the second pipe joint 64. One end portions of the combustion gas guide pipe 20 and the temperature rising gas guide pipe 21 are coaxially connected to the pipe joints 64 and 62 and spaced apart from each other in the radial direction.

  The temperature rising gas heated through the radiator of the internal combustion engine 25 is discharged from the exhaust port 32 of the housing 23, and is guided from the cover body 61 to the temperature rising gas induction pipe 21 through the first pipe joint 62.

  The gas induction cover 60 is made of a material having high heat resistance, corrosion resistance, and weather resistance, for example, a stainless steel plate.

  FIG. 4 is a side view of the work vehicle 1, and FIG. 5 is a plan view of the work vehicle 1. The work vehicle 1 is a road service car in which the power generation device 6 and the tire changer 70 described above are mounted in the packing box 5, and moves to a site where a private house is adjacent at night to perform work such as tire replacement of a broken vehicle. Used to do.

  A power generation device 6 that drives the generator 24 by the internal combustion engine 25 is mounted on the cargo box 5 of the work vehicle 1, and power for moving to the work site and operating various work machines such as the tire changer 70 is used. Can be supplied. Since the power generation device 6 mounted in the packing box 5 is configured to drive the generator 24 by the internal combustion engine 25, combustion gas and temperature rising gas are generated from the internal combustion engine 25 when the power generation device 6 is operated. . Since the exhaust gas such as the combustion gas and the temperature rising gas is guided to the outside of the cargo box 5 from the power generator 6 by the exhaust gas induction means 2, the air in the cargo box 5 is prevented from being polluted by the combustion gas. At the same time, the air in the packing box 5 is prevented from being heated to a high temperature by the temperature rising gas, and the environmental atmosphere in the packing box 5 is prevented from being lowered.

  Since the environment in the cargo box 5 does not deteriorate even when the power generator 6 is operated in this way, the power generator 6 can be operated while being mounted in the cargo box 5, and the cargo box of the power generator 6 in the field can be operated. The work of lifting and lowering to 5 becomes unnecessary, the labor and time for lifting and lowering the power generator 6 can be reduced, and the work efficiency can be improved. Further, since the exhaust of the power generation device 6 is guided to the outside of the cargo box 5 by the exhaust induction means 2, when operating the power generation device 6, it is necessary to keep the door provided in the cargo box 5 open for ventilation. Therefore, the operation sound of the power generation device 6 is blocked by the cargo box 5, the release of the operation sound to the outside is prevented, and the noise is suppressed.

  The combustion gas of the internal combustion engine 25 is configured to be guided to the outside of the cargo box 5 by the combustion gas induction pipe 20 and the temperature rising gas heated by the internal combustion engine 25 is guided by the temperature rising gas induction pipe 21, respectively. Particulate matter (abbreviated as PM) such as graphite, combustion gas containing environmental pollutants such as nitrogen oxide (abbreviated as NOx) and unburned material, and temperature rising gas heated by heat generated by the internal combustion engine 25 Are separately separated and discharged from the packing box 5 to the outside without mixing.

  As a result, part of the combustion gas enters the inside of the heating gas discharge port of the power generation device 6 and the particulate matter contained in the combustion gas adheres to the generator 24 and other devices, and the generator 24 and It is possible to prevent other equipment from being soiled, and to avoid the occurrence of a failure of the power generation device 6 due to this.

  Further, since the combustion gas and the temperature rising gas are individually discharged by the combustion gas induction tube 20 and the temperature rising gas induction tube 21, the combustion gas induction tube 20 and the temperature rising gas induction tube 21 are connected to the combustion gas and the temperature rising gas. It is possible to individually select materials and structures suitable for each property, that is, gas temperature, flow rate, and components, and to realize highly resistant pipelines for each gas component. Exhaust emissions can be achieved over a long period of time.

  Further, since the combustion gas guide tube 20 is inserted into the temperature rising gas guide tube 21 with a space therebetween, a space for disposing the combustion gas guide tube 20 in the load box 5 is not required, and the load box The space occupied by the exhaust guiding means 2 in 5 can be reduced.

  Furthermore, since the through hole 42 is covered with the cover body 43 opened downward, it is possible to prevent intrusion of wind and rain and foreign matters into the temperature rising gas guide pipe 21 from above and from the front. Further, since the cover body 43 is provided on the front wall, airflow or wind pressure during vehicle travel directly acts on the temperature rising gas discharged from the opening of the other end of the through hole 42 and the temperature rising gas guiding pipe 21, The discharge of the temperature rising gas is prevented from being hindered, and the temperature rising gas can be discharged smoothly.

It is a partial sectional view showing work vehicle 1 of one embodiment of the present invention. FIG. 3 is an enlarged cross-sectional view of the exhaust guide unit 2. 4 is a cross-sectional view showing a configuration of a gas induction cover 60. FIG. 1 is a side view of a work vehicle 1. FIG. 1 is a plan view of a work vehicle 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work vehicle 2 Exhaust guidance means 3 Vehicle main body 4 Cargo bed 5 Cargo box 6 Power generation device 10 Front wall 11 Right side wall 12 Left side 13 Rear wall 14 Top wall 15 Floor 20 Combustion gas guide pipe 21 Heating gas guide pipe 23 Housing 24 Generator 25 Internal Combustion Engine 26 Operation Panel 31 Exhaust Port 32 Exhaust Port 40 Duct 41 Space in Duct 40 42 Through Hole 43 Cover Body 46 Gas Inflow Hole 47 Bracket 50 Gas Outflow Hole 51 Holding Metal 53 Exhaust Space 60 Gas Induction Cover 61 Cover Body 62 First pipe joint 63 Combustion gas guide body 64 Second pipe joint A Advancing direction

Claims (2)

A power generation device that drives a generator by an internal combustion engine is mounted in a cargo box installed on the loading platform of the vehicle body, and exhaust that is generated from the power generation device is led from the power generation device to the outside of the cargo box and discharged. Guidance means are provided ,
The exhaust induction means includes a combustion gas induction pipe that guides the combustion gas of the internal combustion engine to the outside of the packing box, and a temperature rising gas induction pipe that guides the temperature rising gas heated by the internal combustion engine to the outside of the packing box. Including
The cargo box has a front wall facing the forward direction of the vehicle, a right side wall that extends rearward from the right edge of the front wall, and a left wall that continues rearward from the left edge of the front wall,
One end of the temperature rising gas induction pipe is connected to the power generator, and the other end of the temperature rising gas induction pipe is connected to the front wall,
A portion of the front wall to which the other end of the temperature rising gas induction pipe is connected is formed with a through hole communicating with the temperature rising gas induction pipe.
The work vehicle is characterized in that the through hole is covered with a cover body that protrudes forward from the front wall and opens downward . The combustion gas guiding tube, a work vehicle for a vehicle according to claim 1, characterized in that it is inserted into the heating gas conducting pipe for packing boxes from the loading device.

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