Work vehicles

Abstract

To provide a work vehicle capable of performing work for discharging a harvest from a grain tank quickly even when a failure or the like occurs and capable of securing quickness of work.SOLUTION: A work vehicle A includes a reaping device 3, a cabin type driving part 5, a thresher 4, a grain tank 7, and a discharge auger 8 for discharging grains stored in the grain tank outside a machine body on a machine body frame 1 mounted with an engine E. The driving part is provided with an emergency discharge arm operated when discharging a harvest stored in the grain tank manually on an emergency basis, and a driving seat rear cover for covering the space between the driving seat and the grain tank in a front-back direction behind the driving seat. The driving seat rear cover includes an emergency discharge cover disposed above the emergency discharge arm that can be attached to or detached from a driving seat rear cover body. When an operator detaches the emergency discharge cover from the driving seat rear cover body, the emergency discharge arm is exposed on a driving seat side, and can be operated from the driving seat.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a work vehicle equipped with a grain tank for storing harvested products. [Background technology]

[0002] Conventionally, examples of this type of work vehicle include those described in Patent Document 1 and Patent Document 2 below. These conventional work vehicles are equipped with a harvesting device that harvests stalks in a field, a threshing device that threshes the stalks, a grain tank that stores the grain threshed by the threshing device, and a discharge auger that discharges the grain stored in the grain tank outside the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-223891 [Patent Document 2] Japanese Patent Publication No. 2020-174672 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional work vehicles, if the harvest stored in the grain tank cannot be discharged due to a failure of the clutch motor or the like, the worker must temporarily suspend work, leave the driver's seat, and manually operate the emergency discharge member to discharge the harvest stored in the grain tank, which is a very time-consuming operation. In this way, spending time urgently discharging the harvest stored in the grain tank can result in missed harvest times, resulting in a decline in the quality of the harvest, or missing the best time or weather for harvesting, resulting in further loss of time in resuming work.

[0005] Therefore, the present invention aims to provide a work vehicle that can quickly discharge harvested crops from a grain tank even in the event of a malfunction, thereby ensuring the speed of work. [Means for solving the problem]

[0006] In order to achieve the above object, the first invention is: A work vehicle equipped with a machine frame on which an engine is mounted, a reaping device for reaping stalks in a field, a cabin-type control section in which an operator sits and operates the machine, a threshing device for threshing the stalks, a grain tank for storing grains threshed by the threshing device, and a discharge auger for discharging the grains stored in the grain tank outside the machine, The operating section is provided with an emergency discharge arm behind the operator's seat that is operated when the harvested product stored in the grain tank is to be manually discharged in an emergency, and a cover behind the operator's seat that covers the gap between the operator's seat and the grain tank. The work vehicle is characterized in that the cover behind the driver's seat is disposed above the emergency ejection arm, and includes a driver's seat rear cover main body and a detachable emergency ejection cover, and the worker can expose the emergency ejection arm on the driver's seat side by removing the emergency ejection cover from the driver's seat rear cover main body, thereby enabling operation from the driver's seat.

[0007] According to the first aspect of the present invention, when urgently discharging the harvest from the grain tank, the operator can operate the operating member for emergency discharge (i.e., the emergency discharge arm described below) by removing the emergency discharge cover from the emergency discharge cover mounting portion provided on the cover body behind the operator's seat. As a result, even in the event of a malfunction, the harvest can be quickly discharged from the grain tank. This ensures rapid work.

[0008] The second invention has the same configuration as the first invention, but also: The emergency ejection cover is provided with a sealing member that seals the upper and lower gaps between the cockpit rear cover and the grain tank, and the sealing member is fastened together with the emergency ejection cover and attached to the cockpit rear cover main body, and is configured so that by removing the emergency ejection cover from the cockpit rear cover main body, the sealing member can also be removed from the cockpit rear cover main body.

[0009] According to the second invention, in addition to the effects of the first invention, when the emergency ejection cover 55 is removed from the cockpit rear cover body, the seal member also comes off from the cockpit rear cover body. This allows for simple and quick attachment and detachment without tools. Furthermore, it is easy to handle maintenance, etc.

[0010] The third invention, in addition to the configuration of the first or second invention, The control section is characterized in that the exhaust purification device is arranged below and inside the cabin in the left-right direction, and is equipped with an exhaust purification device protective cover having a side cover portion formed to fit along the side of the aircraft body and an eave-shaped cover portion formed to extend like an eave from the side of the aircraft body, and above the exhaust purification device, on the inside of the aircraft body, a roof portion is provided to cover and protect the above of the exhaust purification device, and the gap between the exhaust purification device and the eave-shaped cover portion is configured to be larger in dimension than the gap between the exhaust purification device and the inclined edge of the roof portion.

[0011] According to the third invention, in addition to the effects of the first or second invention, by making the gap that serves as the air outlet of the engine cooling fan larger in size than the gap that serves as the air inlet, a layout with good ventilation is possible, allowing hot air to escape easily from the engine room and preventing the adverse effects of heat on the entire aircraft.

[0012] The fourth invention, in addition to the configuration of the third invention, The front part of the control section is fitted with a rigid front plate, sound-proofing and vibration-proofing material, and a resin front cover in that order from the inside of the aircraft, and the side wall of the control section is formed with a wall recess formed by recessing the aircraft wall inward.

[0013] According to the fourth aspect of the present invention, in addition to the effects of the third aspect of the present invention, By covering the front of the control unit with a three-layer structure consisting of a rigid front plate, sound- and vibration-proofing material, and a front cover, it is possible to improve strength and sound and vibration-proofing while enhancing the design effect. Furthermore, the formation of a recess in the wall makes it possible to install the exhaust purification device inside the left and right direction of the cabin while ensuring a transport path for the threshing device. This allows for a compact configuration while protecting the exhaust purification device from the outside.

[0014] The fifth invention, in addition to the configuration of the fourth invention, the operator's seat includes a seat portion on which an operator sits, an axial damper seat base that supports a load so that the position of the seat portion can be changed, and a tilt adjustment mechanism that can adjust the tilt of the seat portion, The tilt adjustment mechanism is characterized in that it has a pair of left and right bending / extending link sections arranged on both the left and right sides of the axial damper sheet base, which can be bent and extended by links, and the lower ends of the bending / extending link sections are fixed to a base plate that is inclined relative to the aircraft body.

[0015] According to the fifth invention, in addition to the effects of the fourth invention, the cockpit is provided with a tilt adjustment mechanism having a pair of left and right bending and extending link parts that can be bent and extended by a link, which allows fine adjustment of the tilt while smoothly following changes in the height of the seat. Furthermore, the base plate is inclined relative to the fuselage, which makes it difficult for dirt and water to accumulate.

[0016] The sixth invention, in addition to the configuration of the fifth invention, The pair of left and right bending and extension link sections are composed of an upper link and a lower link that can bend and extend, and the upper link is fixed to the seat section by an upper link mounting section so that the mounting angle can be adjusted, and the lower link is fixed to the base plate by a lower link mounting section so that the mounting angle can be adjusted.

[0017] According to the sixth aspect of the invention, in addition to the effect of the fifth aspect of the invention, the angle of the seat can be adjusted precisely, allowing the inclination to be adjusted to suit the worker, thereby significantly reducing fatigue. [Effects of the Invention]

[0018] According to the present invention, a work vehicle can be provided that can quickly discharge harvested crops from a grain tank even in the event of a malfunction or the like, thereby ensuring rapid work. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic left side view of a work vehicle according to a preferred embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the cabin of the cockpit of FIG. [Figure 3] FIG. 3 is a plan view of the cabin of the cockpit when the rear cover of the cockpit in FIG. 1 is open. [Figure 4] 4 is a rear view of the cabin of the cockpit of FIG. 1. [Figure 5] 5(a) is a plan view of the emergency ejection arm of FIG. 4 in an exploded state, and FIG. 5(b) is a plan view of the emergency ejection arm of FIG. 4 in an assembled state. [Figure 6] FIG. 6 is a front view of the interior of the cabin of the control section of FIG. [Figure 7] FIG. 7 is a front view of the inside of the cabin when the front cover of the control section of FIG. 1 is attached. [Figure 8] FIG. 8 is a bottom view of the control section of FIG. 1 as seen from below. [Figure 9] FIG. 2 is a left side view of the outside of the cabin of the control section of FIG. 1. [Figure 10]FIG. 10 is a rear view of the cockpit outside the cabin of FIG. [Figure 11] FIG. 11 is a front view of the cockpit of FIG. [Figure 12] FIG. 12 is a right side view of the same. [Figure 13] FIG. 13 is a rear view of the same. [Figure 14] FIG. 14 is an enlarged view of the main part of the front end portion of the base plate shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] An embodiment specifically configured based on the above technical concept will be described below with reference to the drawings. In the description, front, rear, left and right are referred to based on the forward direction F of the work vehicle A. First, the basic configuration of the work vehicle A will be described below.

[0021] <1.Basic configuration> FIG. 1 is a schematic left side view of a work vehicle A according to a preferred embodiment of the present invention. A work vehicle A in a preferred embodiment of the present invention shown in Figure 1 is configured as a so-called combine harvester, with a traveling device 2 consisting of a pair of left and right crawlers that travels on the soil surface provided below a body frame 1, a reaping device 3 that reaps stalks in the field provided in front of the body frame 1, a threshing device 4 that threshers and sorts the reaped stalks provided to the rear left of the reaping device 3, and a control unit 5 on which an operator sits provided to the rear right of the reaping device 3. This control unit 5 has various operating members arranged inside a box-shaped cabin.

[0022] An engine room 6 in which the engine E is mounted is provided below the control unit 5, a grain tank 7 in which threshed and sorted grain is stored is provided behind the control unit 5, and a discharge auger 8 consisting of a vertical discharge auger 8A extending vertically and a horizontal discharge auger 8B extending in the front-to-rear direction for discharging the grain to the outside is provided behind the grain tank 7. In addition, an exhaust purification device 9 that purifies the exhaust gas of the engine E is provided near the engine E in the engine room 6. This exhaust purification device 9 is equipped with a DPF that removes particulate matter in the exhaust gas emitted from the engine E, and an SCR catalyst that purifies nitrogen oxides in the exhaust gas after passing through the DPF by reducing them with ammonia generated from urea water, and fulfills the function of purifying the exhaust gas before discharging it.

[0023] <2. Configuration of Control Unit 5> 2 is a plan view of the inside of the cabin of the control section 5 in FIG. 1, and FIG. 3 is a plan view of the inside of the cabin of the control section 5 in FIG. 1 when the cover at the rear of the cockpit is open. 2 and 3, the control unit 5 is provided with various operating members 51 such as an HST lever and a display 52 capable of displaying various information, located in front of a cockpit 50 where an operator sits. An electrical box 53 housing various electronic devices is located behind the cockpit 50, and a flat cockpit rear cover 54 is located with dimensions that, in a plan view, cover the area from the rear of the electrical box 53 to the front of the grain tank 7. Although not shown in FIGS. 2 and 3, the front of the grain tank 7 is located below the rear of the cockpit rear cover 54. This allows the cockpit rear cover 54 to cover the gap between the front and rear of the cockpit 50 and the grain tank 7.

[0024] The driver's seat rear cover 54 has a width greater than that of the driver's seat 50. The driver's seat rear cover 54 includes a driver's seat rear cover 54 main body, a detachable emergency discharge cover 55, and a seal member 56 attached along the rear edge of the emergency discharge cover 55 to seal the gap between the driver's seat rear cover 54 main body and the grain tank 7. The emergency discharge cover 55 is made of a flexible, generally trapezoidal, flat plate. When urgently discharging the harvested crops in the grain tank 7, the operator removes the emergency discharge cover 55 from the emergency discharge cover attachment portion 54a provided on the driver's seat rear cover 54 main body (see FIG. 3), allowing the operator to operate the operating member related to emergency discharge (i.e., the emergency discharge arm 59 described below) from the driver's seat 50. The seal member 56 is arranged so that its front end overlaps the lower rear end of the driver's seat rear cover 54, and is made of a flexible material such as urethane or rubber.

[0025] Next, the structure for attaching and detaching the emergency ejection cover 55 will be described. The cockpit rear cover 54 has multiple bolt holes 54b at its rear end, the emergency ejection cover 55 has bolt holes 55c on both sides, and the seal member 56 has multiple bolt holes 56a at its front end. The emergency ejection cover 55 and the seal member 56 are fastened together and attached to the cockpit rear cover 54 body by a star-shaped screw knob 55a and bolts 55b, which can be manually fastened and removed. When an operator manually operates the star-shaped screw knob 55a and bolts 55b to remove the emergency ejection cover 55 from the cockpit rear cover 54 body, the seal member 56 also comes off from the cockpit rear cover 54 body. This allows for quick, simple attachment and removal without tools. Furthermore, it is also suitable for maintenance, etc.

[0026] <3. Configuration of the rear of the control unit 5> FIG. 4 is a rear view of the interior of the cabin of the control section 5 of FIG. 4, behind the operator's seat 50 are an emergency discharge arm 59 that an operator operates to manually perform an emergency discharge of the harvested product (e.g., grains) stored in the grain tank 7, a discharge clutch motor 62 that is provided at the bottom of the grain tank 7 and that switches a discharge clutch (not shown) on and off by rotating forward and backward to discharge the harvested product stored in the grain tank 7, and a rod-shaped discharge tension arm 61 that cranks when the discharge clutch motor 62 is rotated in the off direction and pulls a discharge clutch cable 60 to turn the discharge clutch into the off state when a force greater than the tension of a tension spring 61s connected to one end is applied. When the discharge clutch motor 62 is rotated in the on direction, the tension of the tension spring 61s moves the discharge tension arm 61, slackening the discharge clutch cable 60 and turning the discharge clutch into the on state.

[0027] The cockpit rear cover 54 can be attached by fitting a recess (not shown) on the underside of the front end into a protruding cover mounting portion 57 that protrudes upward from the aircraft behind the cockpit 50 in the figure. The emergency ejection arm 59 is located directly below the emergency ejection cover 55 in Figures 2 and 3, and is therefore exposed on the cockpit 50 side by removing the emergency ejection cover 55, allowing an operator to operate the emergency ejection arm 59 from the cockpit 50. This allows an operator to operate the emergency ejection arm 59 without leaving the cabin as in the past, thereby enabling rapid ejection work to be performed even in the event of a malfunction or the like.

[0028] Further, left and right cabin rear mounts 58L, 58R are provided below the cover mounting portion 57. The cabin rear mounts 58L, 58R are provided as a pair on the left and right sides of the engine frame EF (see FIG. 10) and are members that support the bottom of the cabin on the rear side of the machine body while preventing vibrations caused by traveling and machine body drive from being transmitted to the inside of the cabin. Next, the emergency ejection arm 59 will be described.

[0029] 5(a) is a plan view of the emergency ejection arm 59 of FIG. 4 in an exploded state, and FIG. 5(b) is a plan view of the emergency ejection arm 59 of FIG. 4 in an assembled state. 5(a) and 5(b), the emergency ejection arm 59 is formed by fastening a hexagonal nut 592 to an emergency ejection arm lower base 591 in a state in which the hexagonal nut 592 is sandwiched between an upper plate member 593. As a result, the emergency ejection arm 59 is formed with wrench insertion spaces 594 into which a general-purpose wrench can be inserted on both sides of the hexagonal nut 592. As a result, an operator can insert a general-purpose wrench into the wrench insertion space 594 when necessary, and use the general-purpose wrench as a lever to operate the emergency ejection arm 59.

[0030] Here, one end of the tension spring 61s is connected to the discharge tension arm 61, and the other end is connected to the emergency discharge arm 59. Therefore, an operator can move the discharge tension arm 61 by manually operating the emergency discharge arm 59 (see FIG. 4), thereby manually slackening the discharge clutch cable 60 and turning on the discharge clutch. This allows the harvested crop to be manually discharged from the grain tank 7 even if a failure occurs in the discharge clutch motor 62 or the electrical system.

[0031] <4. Configuration of the front of the control unit 5> FIG. 6 is a front view of the inside of the cabin of the control section 5 of FIG. As shown in FIG. 6 , a housing 63 containing a transmission mechanism for transmitting the operation of the various operating members 51 (in the illustrated example, the HST lever) is disposed below the various operating members 51, and a convex case 64 containing the fulcrum shaft of the HST lever is disposed below the housing 63 in the left-right direction, to the right of the convex case 64 in a front view. The brake pedal 66 is disposed below the housing 63 and inside in the left-right direction, thereby making effective use of space. In addition, the height position of the brake pedal 66 when released is configured to be below the upper edge of a wall recess 66 formed on the side wall (left wall) of the control unit 5 by recessing the aircraft (cabin) wall surface toward the inside of the aircraft (cabin). This prevents the foot from coming into contact with the step (wall recess 66) in the left wall when operating the brake pedal 66, which would deteriorate operability.

[0032] FIG. 7 is a front view of the inside of the cabin when the front cover of FIG. 1 is attached. As shown in Figure 7, the front of the control unit 5 is fitted with a rigid front plate 72, soundproof and vibration-proofing material (insulator) 71, and a resin front cover 70, in that order from the inside of the aircraft. The front plate 72 functions to protect the control unit 5 and is formed from a single plate, resulting in a simple configuration that reduces costs. The soundproof and vibration-proofing material 71 is fixed tightly between the front plate 72 and the resin front cover 70 with push rivets or adhesive, improving the soundproof and vibration-proofing effect. The front cover 70 covers the entire surface of the soundproof and vibration-proofing material 71, enhancing the design effect. In this way, covering the front of the control unit 5 with a three-layer structure consisting of the rigid front plate, soundproof and vibration-proofing material 71, and front cover 70 improves strength and soundproof and vibration-proofing performance while also enhancing the design effect.

[0033] FIG. 8 is a bottom view of the control unit 5 of FIG. 1 as viewed from below. As shown in Figure 8, the wall recess 66 is formed to the left of the center of the control section 5 (cabin) and is configured to be located approximately above the engine E. This makes it possible to arrange the exhaust purification device 9 inside the cabin in the left-right direction while ensuring a transport path for the threshing device 4. Furthermore, inside the cabin, it is configured to be located to the left of the driver's seat 50, avoiding being in front of the driver's seat 50 (see Figure 6), so it is located in a position that does not come into contact with the feet of an operator seated in the driver's seat 50 and does not interfere with the operation of the brake pedal 66.

[0034] <5. Configuration of the Exhaust Gas Purification Device 9 and its Surroundings> 9 is a left side view of the outside of the cabin of the control section 5 in FIG. 1, and FIG. 10 is a rear view of the outside of the cabin of the control section 5 in FIG. As shown in Figures 9 and 10, the exhaust purification device 9 is configured to be disposed below the cabin of the control section 5 and inside in the left-right direction. This allows for a compact configuration while protecting the exhaust purification device 9 from the outside. The load of the cabin of the control section 5 is supported by rear cabin mounts 58L, 58R of the engine frame EF, but the exhaust purification device 9 is disposed on the left side of the engine frame EF. An exhaust purification device protective cover 80 that protects the exhaust purification device 9 is provided on the left side of the engine frame EF and above the exhaust purification device 9.

[0035] The exhaust purification device protective cover 80 includes a side cover portion 81 formed to fit along the side of the aircraft body, and an eave-shaped cover portion 82 formed to extend like an eave from the side of the aircraft body. The side cover portion 81 covers the interior of the aircraft body where the engine frame EF and the piping of the exhaust purification device 9 are arranged, and functions to improve the design effect of the aircraft when viewed from the side. The eave-shaped cover portion 82 functions to protect the exhaust purification device 9 from contact, dirt, etc. Although not shown, soundproofing material is arranged on the inside side of the aircraft body of the exhaust purification device protective cover 80, and is configured to provide a soundproofing effect. The exhaust purification device protective cover 80 is configured not to cover the rear portion of the exhaust purification device 9, thereby designing it so as not to interfere with the release of hot air.

[0036] 10, a roof portion 74 that covers and protects the upper part of the exhaust purification device 9 is provided inside the aircraft above the exhaust purification device 9, and the gap d1 between the exhaust purification device 9 and the eave-shaped cover portion 82 is set to be larger than the gap d2 between the exhaust purification device 9 and the inclined side of the roof portion 74. This allows the gap d2 that serves as the air outlet for the cooling fan of the engine E to be set to be larger than the gap d1 that serves as the air inlet, thereby enabling a layout with good ventilation, allowing hot air to escape easily from the engine room 6, and preventing the adverse effects of heat on the entire aircraft.

[0037] The cabin rear mount 87L is located to the right of the exhaust purification device 9, and is configured to be less susceptible to heat from the exhaust purification device 9. The design also avoids the need for many components to ensure rigidity when the mount is placed above the exhaust purification device 9. A harness lead-in space 73 is provided above the exhaust purification device 9 and to the left of the engine frame EF, which makes effective use of the space above the exhaust purification device 9 and allows the harness to be easily removed. As a result, assembly and maintenance are also easier.

[0038] The lower edge of the glass window 5M formed on the left side of the cabin of the control unit 5 is designed to slope downward toward the front, making it easier to operate the front of the reaping device 3 to raise and change gears, and as the lower edge of the glass window 5M is positioned higher toward the rear end, the vertical distance from the reaping device 3 and threshing device 4 is maintained, making it less susceptible to the effects of dust.

[0039] <6. Configuration of cockpit 50> 11 is a front view of the cockpit 50 in FIG. 2, FIG. 12 is a right side view of the same, FIG. 13 is a rear view of the same, and FIG. 14 is an enlarged view of the main part of the front end portion of the base plate in FIG. 11 to 13, the cockpit 50 is equipped with a seat 501 on which an operator sits, an axial damper seat base 502 that has an air damper function for supporting the weight of the seat 501 and a height adjustment function by extension and retraction and is configured to be able to change the attitude of the seat 501, and a tilt adjustment mechanism 90 that can adjust the tilt of the seat 501. Although not shown, the axial damper seat base 502 is equipped with a rotation shaft at its upper end, and is configured so that the operator can swing the cockpit 50 up and down around the rotation shaft to change the attitude.

[0040] The tilt adjustment mechanism 90 includes a pair of left and right bending / extension link portions 90L, 90R that can be bent and extended by links, located on both the left and right sides of the shaft-shaped damper seat base 502. The left and right bending / extension link portions 90L, 90R each include an upper link 91 and a lower link 92. The upper link 91 is attached and fixed to the seat portion 501 by an upper link attachment portion 91t with bolts, and the lower link 92 is attached and fixed to the base plate 503 by a lower link attachment portion 92t with bolts. The lower portion of the upper link 91 and the upper portion of the lower link 92 are fastened to each other by link fastening portions 90r. As a result, by loosening the respective bolts, the bending / extension link portions 90L, 90R can be bent and extended, allowing for fine adjustment of the tilt while accurately following changes in the height of the seat portion 501. When adjusting the tilt adjustment mechanism 90, the operator can set the seat 501 to the desired tilt and then tighten the bolts to easily fix the tilt of the seat 501. It is preferable to use the same parts for each bolt to improve convenience of the operation.

[0041] The base plate 503 is a plate-like member fixed at an angle to the aircraft body, which prevents the accumulation of dirt and water. The axial damper sheet base 502 is disposed so as to penetrate the base plate 503, and the lower portion of the axial damper sheet base 502 is supported by a damper lower fixing portion 505 attached to a floor frame 504 that forms the floor of the control unit 5. As shown in FIG. 14 , the front end of the base plate 503 is connected to a pilot seat-side panel 506 fixed to the floor frame 504. A reinforcing plate 505a is bolted to the bolt-fastening portion 505b, and is further bent and fixed from its midpoint along the base plate 503, thereby improving strength. As a result, the load on the seat unit 501 can be effectively received.

[0042] The upper link mounting portion 91t and the lower link mounting portion 92t are configured so that the mounting angle of the upper link 91 and the lower link 92 can be adjusted and fixed by inserting fixing fasteners (bolts and nuts) into the plate-shaped mounting portions for fixing. This allows for fine adjustment of the angle of the seat portion 501. As a result, an inclination suitable for the worker's preferred posture can be achieved, significantly reducing fatigue.

[0043] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and it goes without saying that these modifications are also included within the scope of the present invention. [Explanation of symbols]

[0044] A Work vehicle 1 Aircraft frame 2 Running gear 3 Reaping device 4. Threshing equipment 5 Control Unit 6. Engine Room 7. Glentank 8 Discharge Auger 9 Exhaust purification device 50 cockpit 51 Various operating parts 52 Display 53 Electrical box 54 Rear cockpit cover 55 Emergency ejection cover 56 Sealing material 57 Cover mounting part 58L, 58R cabin rear mount 59 Emergency ejection arm 60 Discharge Clutch Cable 61 Ejection tension arm 62 Discharge clutch motor 63 Case 64 Convex Case 66 Brake pedal 70 Front cover 71 Soundproofing and vibration-proofing materials (insulators) 72 Front Plate 74 Roof 80 Exhaust purification device protective cover 81 Side cover 82 Eaves-shaped cover 90 Tilt adjustment mechanism 91 Top Link 92 Downlink 501 Seat 502 Axial damper seat base 503 base plate 504 Floor Frame EF engine frame

Claims

1. A work vehicle equipped with a machine frame on which an engine is mounted, a reaping device for reaping stalks in a field, a cabin-type control section in which an operator sits and operates the machine, a threshing device for threshing the stalks, a grain tank for storing grains threshed by the threshing device, and a discharge auger for discharging the grains stored in the grain tank outside the machine, The operating section is provided with an emergency discharge arm behind the operator's seat that is operated when the harvested product stored in the grain tank is to be manually discharged in an emergency, and a cover behind the operator's seat that covers the gap between the operator's seat and the grain tank. the operator's seat rear cover is disposed above the emergency ejection arm and includes an emergency ejection cover that is detachable from the operator's seat rear cover, and an operator can expose the emergency ejection arm on the operator's seat side by removing the emergency ejection cover from the operator's seat rear cover, thereby enabling the emergency ejection arm to be operated from the operator's seat.

2. The work vehicle described in claim 1, characterized in that the emergency ejection cover is provided with a sealing member that seals the upper and lower gaps between the cockpit rear cover and the grain tank, the sealing member is attached to the cockpit rear cover by fastening it together with the emergency ejection cover, and the sealing member can be removed from the cockpit rear cover by removing the emergency ejection cover from the cockpit rear cover.

3. The work vehicle described in claim 1 or claim 2, characterized in that the control section is provided with an exhaust purification device that purifies the exhaust gas of the engine, arranged below and inside the cabin in the left-right direction, and an exhaust purification device protective cover having a side cover portion formed to fit along the side of the aircraft body and an eave-shaped cover portion formed to extend like an eave from the side of the aircraft body, and above the exhaust purification device, a roof portion is provided on the inside of the aircraft body that covers and protects the above of the exhaust purification device, and the gap between the exhaust purification device and the eave-shaped cover portion is configured to be larger in dimension than the gap between the exhaust purification device and the inclined edge of the roof portion.

4. The work vehicle according to claim 3, characterized in that a rigid front plate, sound-proofing and vibration-proofing material, and a resin front cover are attached to the front of the control unit in that order from the inside of the vehicle body, and a wall recess is formed on the side wall of the control unit by recessing the vehicle body wall inward.

5. the operator's seat includes a seat portion on which an operator sits, an axial damper seat base that supports a load so that the position of the seat portion can be changed, and a tilt adjustment mechanism that can adjust the tilt of the seat portion, The work vehicle according to claim 4, characterized in that the inclination adjustment mechanism is provided with a pair of left and right bending and extension link sections that are arranged on both the left and right sides of the axial damper sheet base and can be bent and extended by a link, and the lower ends of the bending and extension link sections are fixed to a base plate that is inclined relative to the vehicle body.

6. 6. The work vehicle according to claim 5, wherein the pair of left and right bending and extending link sections are composed of an upper link and a lower link that are capable of bending and extending, the upper link is fixed to the seat section by an upper link mounting section so that an attachment angle thereof is adjustable, and the lower link is fixed to the base plate by a lower link mounting section so that an attachment angle thereof is adjustable.

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