JP7134268B2 - combine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester in which a threshing device and a grain storage section are arranged side by side on a body frame.

As a combine harvester in which the threshing device and the grain storage section are arranged side by side on the vehicle body frame as described above, there is the following structure.
For example, a strut-like member for supporting the grain tank and the unloader on the rear side is attached to the rear side of the grain tank, and the lower end side of the strut-like member is rotatable about the vertical axis with respect to the vehicle body frame. It is pivotal to Further, the strut-like member is supported by another vertical frame fixed on the vehicle body frame so as to be relatively rotatable. Some fuel tanks are arranged in a narrow space behind the grain tank and between the threshing device and the support-like member or vertical frame (see Patent Document 1).

Japanese Patent Application Laid-Open No. 2012-90556 (see paragraph "0021" and "Fig. 2", "Fig. 4", and "Fig. 6" of the drawings)

In the structure shown in Patent Document 1, when the tank is opened for maintenance or the like, the unloader also rotates around the common vertical axis in the same way as the grain tank, and is maintained in a state where there is no relative change in posture. It is
Since the unloader and the grain tank are configured to rotate about the common vertical axis in this way, the mutual relative posture in plan view does not change, so the grain tank can be opened for maintenance or the like. When doing so, it is useful in that it does not require troubles such as detaching the transmission structure between the grain tank and the unloader, or making the grain conveying path intermittent.

However, in the above structure, the space behind the grain tank has a threshing device on one side in the horizontal direction, and the grain tank is supported on the other side so as to be rotatable about the vertical axis. Since there are many support structures such as pillar-shaped members and vertical frames, the space for arranging the fuel tank is limited to a narrow range. Therefore, there is room for improvement in that it is difficult to dispose a large-capacity fuel tank.

An object of the present invention is to make effective use of the space between the threshing device and the grain tank so that a large-capacity fuel tank can be installed.

The technical means of the combine in the present invention has structural features and operational effects in the following points. [Solution 1]
The technical means of the present invention, which has been taken to solve the above problems, is that a threshing device and a grain storage unit are arranged side by side on a vehicle body frame, and the threshing device and the grain storage unit are arranged side by side. A fuel tank is disposed in the rear part between the A guard member provided with a lower end positioned lower than the lower end of the elbow portion and restricting contact of other objects from below with the fuel tank is attached to the threshing device at the rear end portion of the vehicle body frame. The fuel tank is provided in a state of protruding rearward from a portion corresponding to the fuel tank, and the fuel tank overlaps with the grain storage portion in a plan view and is disposed in a state that does not overlap with the grain storage portion in a rear view. is that

[Actions and effects of the invention according to Solution 1]
According to the invention according to Solution 1, the space between the threshing device and the grain storage section facing each other can be effectively used as a space for arranging the fuel tank on the vehicle body frame, and the capacity of the fuel tank can be increased. In addition, since the fuel tank is located between the threshing device and the grain storage unit, which are heavier, even if the fuel tank has a large capacity, it is easy to maintain a state in which fluctuations in the balance of the vehicle due to increases or decreases in fuel are small. There is also the advantage of

[Solution 2]
Another technical means of the present invention, which has been taken to solve the above problems, is that the fuel filler port of the fuel tank extends above the fuel tank, and the threshing device and the It is provided between the grain storage part.

[Solution 3]
Another technical means of the present invention, which has been taken to solve the above problems, is that the fuel tank is a second reducing device provided on a side portion of the threshing device on the side of the grain storage section when viewed in the longitudinal direction of the machine body. It is arranged at a position overlapping with .

[Solution 4]
Another technical means of the present invention for solving the above problem is that the fuel tank is arranged behind the second reducing device.

[Solution 5]
Another technical means of the present invention for solving the above problem is that the fuel tank is arranged adjacent to the rear end portion of the second reducing device.

[Solution 6]
Another technical means of the present invention, which has been taken to solve the above problems, is that an operating section is provided in front of the grain storage section, an engine is arranged below the driver's seat in the operating section, and a fuel supply pipe is , is provided along the vehicle body frame located below the grain storage section.

[Solution 7]
Another technical means of the present invention to solve the above-mentioned problems is that the filler port of the fuel tank is arranged at the rear portion of the fuel tank so as to face rearward and be adjacent to the guard member in a plan view. provided in the state.

[Solution 8]
Another technical means of the present invention for solving the above problem is that the fuel filler port is provided so as to overlap the existence range of the guard member in a plan view.

[Solution 9]
Another technical means of the present invention for solving the above-mentioned problems is that the guard member restricts the contact of other objects from below with the elbow portion, and the elbow portion is the guard member in a plan view. is provided in a state that overlaps with the existence range of

It is a right side view of the whole ordinary type combine. It is a top view of the whole ordinary type combine. It is a top view which shows the positional relationship of the grain tank installed on the vehicle body frame, a threshing device, and a fuel tank. It is a rear view showing the positional relationship between the grain tank and the threshing device installed on the vehicle body frame and the fuel tank. It is a side view which shows the support structure of a grain tank and an unloader. It is a rear view showing the grain tank and the support structure of the unloader. 7 is a cross-sectional view taken along line VII-VII in FIG. 6; FIG. FIG. 7 is a cross-sectional view taken along line VIII-VIII in FIG. 6; FIG. 4 is an exploded perspective view showing a support structure portion composed of a support frame and a mounting frame; It is explanatory drawing which shows the attachment/detachment state of the attachment frame in a mounting part, (a) shows the state which fitted the attachment frame in the cyclic|annular support body, (b) has shown the extracted state. FIG. 4 is a conceptual diagram showing a transmission system to a grain tank; It is a rear view which shows the attachment part of a jack receiving plate. It is a perspective view which shows the attachment part of a jack receiving plate. It is a rear view which shows the positional relationship of the grain tank installed on the vehicle body frame in another embodiment, a threshing device, and a fuel tank. It is a rear view showing the attachment structure of the grain tank and unloader, and the fuel tank in another embodiment. It is a horizontal sectional view showing a fuel tank in another embodiment. FIG. 10 is a vertical cross-sectional view along the front-rear direction, showing a fuel tank in another embodiment; FIG. 10 is a plan view showing the positional relationship between the linear body mounting plate and the linear body in another embodiment; FIG. 19 is a cross-sectional view taken along line XIX-XIX in FIG. 18; FIG. 10 is a cross-sectional view of a linear body mounting plate portion in another embodiment; It is a top view of the whole ordinary type combine in another embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 〔overall structure〕
1 and 2 show a common combine as an example of the combine.
This ordinary combine harvester is equipped with an operation part B and a pre-reaping treatment device C at the front part of a self-propelled machine body A that travels with a pair of left and right crawler traveling devices 1. A self-propelled body A is provided with a whole culm-throwing type threshing device D into which culms are fed and a grain tank E (corresponding to a grain storage part) for storing grains supplied from the threshing device D.

Glen tank E has a working posture (posture indicated by a solid line in FIG. It is supported so that it can be switched between an inspection posture (posture indicated by a phantom line in FIG. 2) projecting laterally from A. An unloader F is provided on the rear surface of the grain tank E. The unloader F undulates around the swing axis X in the front-rear direction so that it can switch between a storage posture in which the end on the discharge side faces upward and a discharge posture in which the end on the discharge side faces outward. It is equipped to swing freely. Further, a fuel tank 4 is provided on the body frame 10 at a portion corresponding to between the grain tank E and the threshing device D at the rear end of the self-propelled body A.

An engine 3 is arranged below the driver's seat 2 of the operator section B, and a transmission case (not shown) is located at the center of the front part of the self-propelled body A for transmitting the driving force from the engine 3 to the left and right crawler traveling devices 1. ) are provided. This mission case is equipped with a continuously variable transmission that continuously changes the driving force from the engine 3, and also incorporates a steering clutch (not shown) that intermittently transmits the driving force to the left and right crawler traveling devices 1. It is

The pre-harvesting device C is configured to rake up the tip side of the planted grain culm by rotating the raking reel 5 and cut the base of the grain culm with the cutter 6 . The harvested grain culms (harvested grain culms) are laterally fed by the horizontal feeding auger 7 and gathered near the entrance of the feeder 8, and all the culms are rearwardly fed by the feeder 8 and sent to the threshing device D. It is configured. The pre-reaping treatment device C is configured to be vertically swingable about a horizontal axis (not shown) on the rear end side of the feeder 8 . An actuator (not shown) such as a hydraulic cylinder for vertical swinging is provided, and the cutting height of the culms can be adjusted by setting the amount of swinging caused by the operation of the actuator.

[Boarding operation department]
The operation section B is provided with a box-shaped engine cover 11 covering the upper side of the engine 3 , and an operator's seat 2 is provided on the upper surface of the engine cover 11 . An intake case 11A is formed on the outer side of the engine cover 11, and an intake portion 11B with a dustproof net is formed on the outer surface side of the intake case 11A to take in the cooling air.
A control tower 12 is erected on the front side of the driver's seat 2, and on the upper surface side of the control tower 12, an operation tool for controlling the steering of the self-propelled body A and an operation tool for controlling the elevation of the reaping pretreatment device C are provided. A steering lever 13 that also serves as a
As shown in FIG. 2 , a side panel 14 is provided on the left side of the driver's seat 2 and extends rearward from the left lateral end of the control tower 12 . On an upper surface 14A of the front end portion of the side panel 14, a main gearshift lever 15A and an auxiliary gearshift lever 15B are provided as a shift operation tool 15 for controlling the travel speed of the self-propelled vehicle A.

A threshing clutch lever 16A and a reaping clutch lever 16B are arranged side by side on the left and right on the side of the upper surface 14A of the side panel 14 and at a position rearward of the speed change operation tool 15 . The threshing clutch lever 16A and the reaping clutch lever 16B engage and disengage a threshing clutch (not shown) in the threshing device D by swinging the threshing clutch lever 16A back and forth, and reap the clutch by swinging the reaping clutch lever 16B back and forth. A reaping clutch (not shown) in the pretreatment device C is configured to be switched on and off.
Further, an operation box 17 equipped with a discharge clutch lever 18 is provided on the side panel 14 behind the threshing clutch lever 16A and the reaping clutch lever 16B. The ejection clutch lever 18 is an operating tool for switching on and off the ejection clutch G, which will be described later, between a state in which the unloader F is allowed to eject grains and a state in which the ejection of grains is stopped.

A steering lever 13 provided on the upper surface side of the control tower 12 is maintained in a neutral posture in a non-operating state. Steering (turning) of the self-propelled body A is realized by controlling a steering clutch built in. Further, by operating the steering lever 13 in the front-rear direction, the actuator described above is controlled, and the pre-reaping treatment device C is moved up and down.
The speed change operation tool 15 is operated in the front-rear direction to change the speed of the continuously variable transmission to change the running speed. The threshing clutch lever 16A is configured to perform on/off operation of the threshing clutch for intermitting power to the threshing device D by operation in the front-rear direction. The reaping clutch lever 16B is configured to perform an on/off operation of a reaping clutch that connects and disconnects power to the pre-reaping treatment device C by operating it in the front-rear direction.

As shown in FIG. 11, a discharge clutch G is provided for transmitting the driving force from the engine 3 to the discharge system of the grain tank E, and the discharge clutch lever 18 is linked to operate the discharge clutch G. With such a configuration, by operating the discharge clutch lever 18 to the engaged position, the discharge clutch G is engaged, the driving force from the engine 3 is transmitted to the bottom screw 21 of the grain tank E, and the unloader F is driven. Then, discharge of the grains from the grain tank E is realized.

[Threshing device]
The threshing device D is an axial flow type threshing cylinder (not shown) that is driven to rotate about the axis of the self-propelled machine body A in the longitudinal direction so as to thresh the harvested culms supplied to the threshing chamber. , and a sorting device (not shown) for sorting out grains from the treated material obtained by the scraping process.
In this sorting device, the first sorted grain is supplied to the grain tank E by the grain lifting device 9, and the second grain is supplied to the grain tank E by the second reducing device 19. (not shown), and straw scraps other than grains are dropped and discharged to the rear of the self-propelled machine A from the rear of the sorting device.

[Glentank]
As shown in FIGS. 1 and 5 and 6, the grain tank E has a bottom screw 21 at the bottom of the tank body 20 for feeding the grains stored in the tank body 20 backward. Most of the bottom wall 20A of the tank body 20 becomes lower toward the outside in the left-right direction so that the stored grains flow down toward the outside of the self-propelled machine A in the working posture stored in the self-propelled machine A. It is formed on an inclined surface. Due to such a structure, the position of the bottom screw 21 is biased to the outside of the self-propelled vehicle A.
As described above, the grain flows down to the outside of the self-propelled machine A so as to guide the grain toward the bottom screw 21 provided at the bottom while the self-propelled machine A is biased toward the outside. The portion having the bottom wall 20A formed on the inclined surface that becomes lower toward the outer side in the left-right direction corresponds to the lower portion of the grain tank E that narrows downward.

As shown in FIG. 11, the front end of the screw shaft 21A of the bottom screw 21 protrudes forward from the front wall 20f of the tank body 20, and an intermediate shaft 22 in a lateral posture is connected to this projecting portion via a bevel gear 21B. ing. Engine power is transmitted to the intermediate shaft 22 via the output shaft 3 a of the engine 3 , the belt transmission mechanism 23 and the input shaft 24 . The intermediate shaft 22 is provided at the front lower portion of the tank body 20 along the front wall 20 f of the tank body 20 .
The aforementioned discharge clutch G is configured as a belt tension type that switches the driving force to the belt transmission mechanism 23 for transmitting the driving force from the engine 3 to the intermediate shaft 22 by switching between the belt tension state and the slack state. It is The ejection clutch lever 18 is configured so as to be able to adjust the tension of the belt of the belt transmission mechanism 23, and is configured so that the power is interrupted by adjusting the belt tension.

The rear end of the screw shaft 21A of the bottom screw 21 protrudes rearward from the rear wall 20r of the tank body 20, and the axis of the screw shaft 21A coincides with the swing axis X of the unloader F.
In other words, the rear wall 20r of the tank body 20 is provided with a discharge cylindrical portion 25 having a grain discharge port 20B for feeding the grains fed from the bottom screw 21 to the unloader F in a state of protruding rearward. . This discharge cylinder part 25 is integrally connected and fixed to a rear reinforcing plate 27 attached to the rear wall 20r so as to reinforce the periphery of the grain discharge port 20B. The discharge cylinder 25 is disposed so that its center axis coincides with the axis of the screw shaft 21A and the swing axis X of the unloader F, and an elbow part 30, which will be described later, is fitted in the discharge cylinder 25. By connecting them together, the entire unloader F including the elbow portion 30 is configured to be able to swing about the swing axis X. As shown in FIG.

A rear portion of the grain tank E, which is capable of turning and rocking about the vertical axis Y, is supported by a support frame 50, which will be described later. 2 and 3, a well-known guide roller 26 ( The guide rollers 26 are configured to share and support the weight of the front side of the grain tank E when it is in the working posture stored in the self-propelled body A.

[Unloader]
The unloader F is provided with an elbow portion 30 at the introduction side end portion corresponding to the upper side in the grain conveying direction, and a straight tubular vertical conveying path R forming a straight vertical conveying route R on the conveying downstream side of the elbow portion 30. A cylindrical portion 31 is connected.
The elbow part 30 has an introduction cylinder part 30A that fits into the discharge cylinder part 25 on the side of the grain tank E from behind, and a lead-out cylinder part 30B that continues in a posture orthogonal to this. The vertical tube portion 31 is connected to the tube portion 30B.
The vertical tube portion 31 includes a straight tube-shaped discharge tube 34 and a discharge screw 35 arranged inside the discharge tube 34 so as to form a straight vertical conveying path R therein. The portion is provided with a grain discharge port 36 for guiding grains in a direction orthogonal to the longitudinal direction of the discharge cylinder 34 .

The unloader F configured in this manner is configured to be capable of switching between a retracted posture in which the discharge-side end faces upward and a discharge posture in which the discharge-side end faces outward.
As shown in FIG. 4, in the retracted position, the center axis Z (corresponding to the cylinder axis) of the vertical tube portion 31 is slightly tilted inward of the self-propelled body A with respect to the vertical line. Therefore, the vertical tubular portion 31 is tilted to the left when viewed from the rear. In the ejection posture, the central axis Z of the vertical tube portion 31 is oriented slightly upward from the horizontal line, and the vertical tube portion 31 is inclined upward to the right when viewed from the rear.

The discharge screw 35 has a screw shaft 35A, and the screw shaft 35A is rotatably supported around the central axis Z.
A portion of the screw shaft 21A of the bottom screw 21 is inserted into the introduction cylinder portion 30A of the elbow portion 30, and a part of the discharge screw 35 is inserted into the lead-out cylinder portion 30B of the elbow portion 30. . A bevel gear mechanism (not shown) having a pair of bevel gears that rotate about mutually orthogonal axes so as to transmit the driving force of the screw shaft 21A to the screw shaft 35A of the discharge screw 35 is provided inside the elbow portion 30. there is

With such a transmission structure, it becomes possible to transmit the driving force of the bottom screw 21 to the discharge screw 35 via the bevel gear mechanism of the elbow portion 30 . The grains in the grain tank E are conveyed from the bottom screw 21 to the discharge screw 35 and discharged from the grain discharge port 36 at the end of the unloader F conveyance.
In this unloader F, the direction of rotation of the bottom screw 21 is set to the left (counterclockwise) when the grain tank E is viewed from behind. Therefore, when the grains are unloaded from the unloader F, torque acts on the vertical cylindrical portion 31 of the unloader F in the lifting direction to move the unloader F toward the storage posture.

[Support structure]
A support structure for supporting the grain tank E and the unloader F will be described.
The support structure includes a support frame 50 erected on the body frame 10 and an attachment frame 40 attached to the grain tank E. As shown in FIG.

[Supporting frame]
As shown in FIGS. 4 to 8, the support frame 50 includes a vertical columnar portion 51 formed in a rectangular columnar shape from a rectangular tubular member, a mounting plate 52 provided at the lower end side to the vehicle body frame 10, and the vertical columnar portion 51. and a holding support portion 55 provided at the upper end portion of the vertical columnar portion 51 .
By connecting the mounting plate 52 at the lower end to the vehicle body frame 10 with bolts, the vertical columnar portion 51 is fixed to the vehicle body frame 10 in an upright posture.
The mounting portion 53 provided near the lower portion of the vertical columnar portion 51 includes a support bracket 53A formed of a downwardly open channel-shaped member, and an annular support 53B provided on the upper surface side of the support bracket 53A. A support bracket 53A is welded to the right lateral side surface of the vertical columnar portion 51 and protrudes to the right lateral side. The annular support 53B is welded and fixed to the upper surface of the support bracket 53A. The upper surface of the support bracket 53A and the annular support 53B constitute a mounting portion 53 that rotatably supports the mounting frame 40, which will be described later, from below. That is, in a state in which the lower end of the mounting frame 40 is placed on the upper surface side of the support bracket 53A, the lower end of the mounting frame 40 is fitted into the annular support 53B so that the mounting frame 40 is supported from below. The support structure is rotatable.

As shown in FIGS. 5 to 9, in the holding support portion 55 provided at the upper end of the vertical columnar portion 51, mounting pieces 55a, 55a are welded toward the right laterally outward on both front and rear surfaces near the upper end. The mounting pieces 55a, 55a are fixed, and a holding fitting 56 composed of a pair of right and left first holding bodies 56A and second holding bodies 56B is connected by bolts.
The first embracing body 56A includes a first holding plate 56Aa that contacts the outer peripheral surface of the mounting frame 40 on the inner side of the machine body, and a connecting plate that connects both front and rear ends of the first holding plate 56Aa to the mounting pieces 55a, 55a. 56 Ab. The second embracing body 56B includes a second holding plate 56Ba that contacts the outer peripheral surface of the mounting frame 40 on the outer side of the fuselage at a position facing the first holding plate 56Aa. It is bolted to the plate 56Aa.
Each of the first holding plate 56</b>Aa and the second holding plate 56</b>Ba has a curved shape in which a portion that contacts the outer peripheral surface of the mounting frame 40 is recessed in an arc shape along the outer peripheral surface of the mounting frame 40 . In the hugging state of the hugging support portion 55 configured in this manner, the mounting frame 40 is allowed to rotate relative to the vertical axis Y, and the horizontal movement of the mounting frame 40 is restricted.

At the upper end of the vertical columnar portion 51, another mounting plate 57 is welded and fixed toward the left lateral direction opposite to the right lateral outward direction to which the holding support portion 55 is attached, that is, toward the fuselage inner side. A horizontal frame 58 is bolted to the mounting plate 57 .
As shown in FIGS. 6, 8, and 9, the mounting plate 57 is formed by bending a plate material into a channel shape on the upper side, and further extending downward from the lower end side of the bent portion in the channel shape. It is of a shape having a plate portion that is curved. The left and right edge portions of the bent plate material are welded and fixed in contact with the left side surface of the vertical columnar portion 51, rather than the plate surface facing the front-rear direction. The reason why the mounting plate 57 is bent in this way is to increase the shape retention strength of the mounting plate 57 itself and to secure the length of the weld line to the vertical columnar portion 51 for strong mounting.
One end of a horizontal frame 58 is bolt-connected to the plate surface of the mounting plate 57 facing in the front-rear direction, and the other end of the horizontal frame 58 is attached to a reinforcing rib-like member D1 fixed to the horizontal side wall D2 of the threshing device D. are bolted together. As a result, the vertical columnar portion 51 is fixed to the vehicle body frame 10 at its lower end and connected and fixed to the threshing device D at its upper end.

[Mounting frame]
The mounting frame 40 , which is rotatably supported about the vertical axis Y with respect to the support frame 50 erected on the vehicle body frame 10 , is a rectangular tubular material that constitutes the vertical columnar portion 51 of the support frame 50 . It is composed of a cylindrical member (corresponding to a columnar body with a circular cross section) having a diameter similar to that of the
The mounting frame 40 is connected to the rear wall 20r of the grain tank E by mounting brackets 41, 42, and 43 at three points near the upper end, near the lower end, and near the upper end in the middle in the vertical direction. Fixed.
Each of the mounting brackets 41, 42, 43 is composed of a rectangular tube-shaped member having one side longer than the diameter of the mounting frame 40 in the left-right direction. It is welded in a state that penetrates to and is fixed integrally.

Also, the portion between the mounting bracket 41 near the upper end of the mounting frame 40 and the mounting bracket 42 near the upper end in the intermediate portion is rotatably supported by a holding support portion 55 provided at the upper end of the support frame 50 . embraced and supported.
As shown in FIG. 10(b), the lower end of the mounting frame 40 projects downward by a predetermined length d1 from the lower surface of the mounting bracket 43 near the lower end. It is fitted to an annular support 53B provided on the mounting portion 53. As shown in FIG.
At this time, while the lower end surface of the mounting frame 40 is slightly lifted from the upper surface of the support bracket 53A of the mounting portion 53, the lower surface of the mounting bracket 43 near the lower end contacts the upper edge of the annular support 53B. , the mounting frame 40 is supported from below.

The predetermined length d1 of the projecting portion 40a projecting downward from the lower surface of the mounting bracket 43 at the lower end of the mounting frame 40 is determined as follows. That is, as shown in FIG. 10A, in a state in which the protruding portion 40a is fitted to the annular support 53B provided on the support bracket 53A of the mounting portion 53, the lower end surface of the mounting frame 40 is attached to the support bracket 53A. , and when the grain tank E is lifted and the lower end of the mounting frame 40 is pulled out from the annular support 53B, the upper portion of the outer peripheral surface of the introduction cylinder portion 30A of the unloader F is in contact with the support bracket 53A. It is set to the extent that it does not come into contact with the lower edge of the
That is, the fitting allowance between the projecting portion 40a and the annular support 53B is the upper end of the outer peripheral surface of the introduction cylinder portion 30A of the unloader F and the lower end of the support bracket 53A in the state where the grain tank E is installed at a predetermined position. It is set shorter than the vertical distance from the edge, and when loading and unloading the grain tank E to and from the vehicle body frame 10, the introduction cylinder portion 30A of the unloader F and the lower edge of the support bracket 53A are prevented from coming into contact with each other and being damaged. It is designed to avoid
On the upper side of the mounting frame 40, as shown in FIG. 10(a), when the projecting portion 40a is fitted into the annular support 53B, the second holding plate 56Ba of the fitting 56 is the first holding plate. It is in a state of being connected to the plate 56Aa. When the grain tank E is lifted and the lower end portion of the mounting frame 40 is pulled out from the annular support 53B, the second holding plate 56Ba is removed from the first holding plate 56Aa. By doing so, the mounting bracket 42 at the intermediate position can be lifted up to a position where it does not come into contact with the first holding plate 56Aa of the fitting 56 . In this state, as shown in FIG. 10B, the lower end of the mounting frame 40 is pulled out from the annular support 53B.

The central axis of the mounting frame 40, which is made up of a cylindrical member, is rotatably supported by fitting the mounting frame 40 to the annular support 53B of the mounting portion 53 on the lower side, and is embraced and supported on the upper side. By being rotatably supported by the portion 55, a vertical axis Y, which is the center of rotation of the grain tank E, is configured.
That is, the mounting frame 40 is integrally formed with the grain tank E via the respective mounting brackets 41, 42, 43, and the area center of the mounting frame 40 formed of a cylindrical member and the grain tank E in a plan view are A vertical axis Y coincides with the center of rotation.

A receiving portion 44 for stably maintaining the retracted posture of the unloader F is provided on the mounting frame 40 between the mounting bracket 43 near the lower end and the mounting bracket 42 at the intermediate portion.
To the receiving portion 44, a mounting plate 45 having a plate surface inclined so as to be higher toward the right laterally outward than a plane perpendicular to the vertical axis Y, which is the central axis of the mounting frame 40, is welded and fixed. At the same time, a receiving plate 46 bolted to the mounting plate 45 extends rearward. The receiving plate 46 is provided with an arc-shaped curved concave portion 46A that conforms to the shape of the outer peripheral surface of the vertical tubular portion 31 of the unloader F. As shown in FIG. Therefore, when the unloader F is in the retracted posture, the outer peripheral surface of the unloader F on the inner side of the fuselage comes into contact with the curved concave portion 46A of the receiving plate 46 in a state of being fitted therein, thereby preventing the unloader F from moving further inside the fuselage from the retracted posture. It is configured to prevent tilting in one direction and movement in the front-rear direction.

As shown in FIGS. 5 to 9, the mounting bracket 42 of the intermediate portion has a channel-shaped stationary stop piece 42A, which is open on the right lateral side, welded to the right lateral side thereof. A movable stop piece 31A having an L-shaped cross section is fixed by welding to an intermediate portion of the vertical cylindrical portion 31 of the unloader F so as to overlap a portion of the upper side of the fixed side stop piece 42A in the retracted posture of the unloader F. ing. Two through holes 42Aa and 42Ab are formed separately in the front-rear direction in the fixed side stop piece 42A on the mounting bracket 42 side, and the fixed side stop piece 42A is formed in the movable side stop piece 31A on the vertical tube portion 31 side. One through hole 31Aa is formed at a position corresponding to one of the two through holes 42Aa and 42Ab.
Therefore, as shown in FIG. 8, when the unloader F is stored, one of the two through holes 42Aa and 42Ab of the fixed-side stop piece 42A on the mounting bracket 42 side and the movable-side stop piece on the vertical tubular portion 31 side When one stop pin 47 is inserted through one through hole 31Aa formed in 31A (FIG. 8 shows a state in which the stop pin 47 is inserted into the through hole 42Aa), the vertical cylinder of the unloader F The unloader F can be maintained in a locked state in which the unloader F is fixed to the mounting frame 40 in a posture in which the portion 31 is received by the receiving portion 44 . The locking pin 47, the movable side locking piece 31A, and the fixed side locking piece 42A constitute a lock mechanism that regulates the position of the unloader F. As shown in FIG.
When the stop pin 47 is pulled out, the positional regulation of the unloader F by the lock mechanism is released. Then, if the extracted locking pin 47 is inserted into another through hole 421Ab of the fixed side locking piece 42A, which is located at a position that does not overlap with the movable side locking piece 31A in FIG. With the stop pin 47 held by the machine body, the unloader F can be freely raised and swayed.

As shown in FIG. 4, the mounting frame 40 is arranged above the mounting portion 53 extending toward the upper side of the introduction cylinder portion 30A of the unloader F with respect to the support frame 50. Visually, it is located in a state in which it substantially overlaps with the vertical tube portion 31 in the retracted posture. As a result, the mounting frame 40 and the unloader F can be brought close to each other or overlapped in the width direction of the self-propelled body A, and the space in the left-right direction for arranging them can also be saved.

As shown in FIGS. 1 and 5, at the upper end of the mounting frame 40, when the grain tank E is in the working position on the self-propelled machine body A, a work light 49 illuminates a wide range of the right side outside of the machine body. is installed.
Since the work light 49 is provided at this position, when performing the grain discharging work with the unloader F laid down laterally outward, a favorable working environment is provided by illuminating the discharge target location from the unloader F. It is what you get.
Further, as shown in FIGS. 6 and 10, a mounting plate 57 for connecting the horizontal frame 58 on the upper portion of the mounting frame 40 is provided with an alarm for informing that the self-propelled body A is in a backward movement state. A buzzer 59 for is attached.

[Swing drive device]
A rocking drive device for rocking the unloader F will be described.
The rocking drive device is composed of a double-acting hydraulic cylinder 60 that is driven to extend and retract. As shown in FIGS. 4 to 6, the hydraulic cylinders 60 are arranged across the grain tank E, which includes the mounting frame 40 rotatably supported with respect to the support frame 50, and the unloader F. As shown in FIGS.
That is, the upper end of the cylinder tube 61 located at one end of the hydraulic cylinder 60 is connected to the grain tank E side, and the lower end of the piston rod 62 located at the other end is connected to the unloader F side. Hereinafter, the end on the cylinder tube 61 side will be referred to as a first end, and the end on the piston rod 62 side will be referred to as a second end.

A first end of the cylinder tube 61 is connected to an intermediate mounting bracket 42 extending rearward from the rear wall 20r of the grain tank E. As shown in FIG. A downwardly open channel-shaped connecting member 48 is welded and fixed to the mounting bracket 42 on the lower surface side, and is connected to the connecting member 48 so as to be swingable around a connecting pin 63 provided in the front-rear direction.

A second end portion of the piston rod 62 positioned on the other end side of the hydraulic cylinder 60 is pivotable about a connecting pin 64 with respect to a connecting bracket 39 provided on the vertical cylindrical portion 31 of the unloader F. connected to The connecting bracket 39 is fitted on a portion of the vertical tubular portion 31 of the unloader F adjacent to the elbow portion 30 and attached to a tubular reinforcing member 38 fixed by welding.
The hydraulic cylinder 60 arranged in this manner has a first end connected to the mounting frame 40 at an upper position and positioned inside the self-propelled vehicle body A, and a second end connected to the unloader F. is positioned below and laterally outward of the self-propelled body A from the first end.

As shown in FIG. 5, the vertical axis Y of the mounting frame 40 erected on the rear side of the grain tank E in side view and the central axis Z of the vertical cylindrical portion 31 of the unloader F are parallel. The unloader F is positioned at a predetermined small distance from the mounting frame 40 in the front-rear direction, and the hydraulic cylinder 60 is disposed in the space having this small distance. It has a center line CL that is parallel to the center axis Z of the vertical cylindrical portion 31 of the unloader F when viewed from the side.
That is, the connecting member 48 on the mounting frame 40 side is located rearward of the rear edge of the outer peripheral surface of the mounting frame 40 in side view, and the connecting bracket 39 on the unloader F side is positioned on the vertical cylinder of the unloader F in side view. It is located on the front side of the front edge of the outer peripheral edge of the portion 31 . The hydraulic cylinder 60 connected to the connecting member 48 and the connecting bracket 39 is arranged such that its center line CL is parallel or substantially parallel to the vertical axis Y and the central axis Z when viewed from the side. installed.
The swing axis X of the unloader F is orthogonal to the vertical axis Y, center axis Z, and center line CL. Therefore, when the unloader F undulates and swings as the hydraulic cylinder 60 expands and contracts, it is possible to prevent the hydraulic cylinder 60 from interfering with the unloader F and the mounting frame 40 .

As shown in FIGS. 4 and 6, when viewed from the rear, the vertical cylindrical portion 31 of the unloader F is located at the center axis Z with respect to the vertical axis Y of the mounting frame 40 standing on the rear side of the grain tank E. is the retracted posture of the unloader F, and is received by the receiving portion 44 in a state in which the self-propelled body A is slightly tilted inward.
In this retracted posture, the center line CL of the hydraulic cylinder 60 is inclined more toward the inside of the self-propelled body A than the inclination of the central axis Z of the vertical tubular portion 31 of the unloader F. there is
That is, the connecting member 48 on the side of the mounting frame 40 to which the first end of the hydraulic cylinder 60 is connected is located on the lower surface side of the intermediate mounting bracket 42 connected to the mounting frame 40 in a rear view, and the connecting pin is located on the lower surface side of the mounting bracket 42 . 63 is positioned near the vertical axis Y of the mounting frame 40 . Further, the connecting bracket 39 on the unloader F side to which the second end of the hydraulic cylinder 60 is connected protrudes rightward from the outer peripheral surface of the unloader F in a rear view, and the connecting pin 64 extends from the outer peripheral surface of the unloader F. It is positioned to the right of the right edge.
The swing axis X of the unloader F is positioned laterally outward of the self-propelled machine body A with respect to the vertical axis Y of the mounting frame 40, and the unloader F is inclined inward of the machine body in the retracted posture. The inclination angle of the central axis Z of the vertical tubular portion 31 of the unloader F with respect to the vertical line is smaller than the inclination angle of the hydraulic cylinder 60 . Therefore, the inclination of the hydraulic cylinder 60 is greater than the inclination of the unloader F supported by the receiving portion 44 .

The inclination of the hydraulic cylinder 60 is such that the direction of expansion and contraction of the hydraulic cylinder 60 is set by a line of force that is as close as possible to the direction orthogonal to the central axis Z of the vertical cylindrical portion 31 of the unloader F when the unloader F is smoothly undulated and rocked. It is useful to ensure that Further, since the connecting member 48 is provided so as to protrude rightward from the right edge of the outer peripheral surface of the mounting frame 40 and to which the first end portion of the hydraulic cylinder 60 is connected, the connecting member 48 can be attached to the mounting frame, for example. This is effective in shortening the length of the hydraulic cylinder 60 as much as possible compared to the case where it is projected leftward from the left edge of the outer peripheral surface of the cylinder 40 .
A second end portion of the hydraulic cylinder 60 is connected to a connecting bracket 39 attached to a tubular reinforcing member 38 that is externally fitted to a portion adjacent to the elbow portion 30 in the vertical cylindrical portion 31 of the unloader F. . By connecting the vertical cylindrical portion 31 at a position closest to the elbow portion 30, the rotation radius of the movement locus r1 of the second end portion around the swing axis X of the unloader F is reduced, and the hydraulic pressure is reduced. This is effective in reducing the amount of expansion and contraction of the cylinder 60 .

As shown in FIG. 4, the hydraulic cylinder 60 arranged in this way is located closer to the second end than the line segment L1 connecting the connecting pin 63 on the first end side and the swing axis X of the unloader F. The position of the connecting pin 64 of the part is located on the lateral outside of the self-propelled body A. Therefore, the hydraulic cylinder 60 is configured to contract most in the retracted posture and extend most in the ejected posture.
In the process of shifting from the ejection posture to the storage posture, the unloader F moves from a state in which it stands upright on the vertical line of the swing axis X of the unloader F, crosses the position on the vertical line of the swing axis X, and moves to the self-propelled body. It reaches a retracted posture in which it is slightly tilted toward the inside of A.

In the hydraulic cylinder 60 for swinging the unloader F, pressure oil is supplied to the oil chamber on the lower side of the cylinder tube 61 during the upward swinging stroke until the unloader F stands upright on the vertical line of the swing axis X from the discharge posture. supply. At the same time, pressure oil is discharged from the oil chamber on the upper side to allow movement of the piston rod 62 in the contraction direction. At this time, the weight in the direction in which the unloader F tries to return to the discharge posture side always acts on the oil chamber on the lower side of the hydraulic cylinder 60, and when the unloader F stands upright, the weight in that direction becomes zero.
In the swinging process in which the unloader F moves to the storage posture beyond the vertical position of the swing axis X, the weight of the unloader F pushes the piston rod 62 as the unloader F tilts toward the storage posture. It acts to push up in the contraction direction.
Therefore, there is a risk that the operating speed of the hydraulic cylinder 60 will increase during the swinging stroke in which the cylinder tube 61 shifts to the retracted posture. The actuation speed of the hydraulic cylinder 60 can be adjusted.

When the unloader F swings downward from the state in which the unloader F is in the retracted posture until it stands upright on the vertical line of the swing axis X, pressure oil is supplied to the oil chamber on the upper side of the cylinder tube 61 . At the same time, pressurized oil is discharged from the lower oil chamber (not shown) to allow the piston rod 62 to move in the extending direction.
At this time, the weight in the direction in which the unloader F tends to return to the retracted position always acts on the oil chamber on the upper side of the hydraulic cylinder 60, and when the unloader F stands upright, the weight in that direction becomes zero.
In the swinging stroke in which the unloader F moves beyond the position where it stands upright on the vertical line of the swing axis X and shifts to the ejection posture, the weight of the unloader F pushes the piston rod 62 along with the tilting of the unloader F toward the ejection posture. It acts to draw out in the direction of elongation.
Therefore, there is a risk that the operating speed of the hydraulic cylinder 60 will increase during the swing stroke in which the hydraulic cylinder 60 shifts to the discharging posture. Speed can be adjusted.

If the hydraulic cylinder 60 were of a single-acting type, it would not be possible to smoothly drive the unloader F, which has a structure in which the self-propelled vehicle body A is stored while being slightly tilted inward as described above. Since it is a dynamic type, there is no such problem.
That is, if the hydraulic cylinder 60 is of a single-acting type and has a structure in which pressure oil is supplied to the oil chamber on the lower side of the cylinder tube 61, the pressure oil cannot be supplied to the oil chamber on the upper side. The unloader F cannot swing downward from the state in which the unloader F is in the retracted posture until the unloader F stands upright on the vertical line of the swing axis X.
If the hydraulic cylinder 60 is of a single-acting type and has a structure in which pressure oil is supplied to the oil chamber on the upper side of the cylinder tube 61, the pressure oil cannot be supplied to the oil chamber on the lower side. The unloader F cannot swing upward from the state in which the unloader F is in the discharge posture until the unloader F stands upright on the vertical line of the swing axis X.
Since the hydraulic cylinder 60 of the present invention is of the double-acting type, it is possible to supply pressure oil to the oil chambers on both the upper side and the lower side of the cylinder tube 61 . Therefore, the unloader F, which has a structure in which it is stored while being slightly tilted inward of the self-propelled body A, can be oscillatingly driven without hindrance.

[Fuel tank]
As shown in FIGS. 1 to 4 and 6, the fuel tank 4 is arranged on the body frame 10 at the rear end of the self-propelled vehicle A at a position corresponding to between the grain tank E and the threshing device D. is set.
A main body portion 70 of the fuel tank 4 is generally formed in a substantially rectangular box shape as a whole, and is provided with a fuel filler port 71 opening obliquely rearward and upward at the rear end side upper portion.
As shown in FIGS. 1 to 3, the front end of the body portion 70 is located near the rear end of the second reducing device 19 of the threshing device D, and the rear end thereof is located near the rear wall 20r of the grain tank E in the front-rear direction. is extended rearward to extend beyond the rear end of the vehicle body frame 10 to a range substantially at the same position as the rear end of the unloader F in the retracted posture.
In the left-right direction, as shown in FIGS. 2 to 4 and 6, about half of the right side of the front portion of the grain tank E sinks into the lower space of the tank main body 20 formed by the inclined bottom wall 20A of the grain tank E. It is arranged between the threshing device D and the grain tank E in the state.
In the vertical direction, as shown in FIGS. 4 and 6, the upper end portion of the right side of the body portion 70 is tilted with respect to the grain tank E in the working posture accommodated on the self-propelled body A. The bottom wall 20A is arranged in close proximity to a position close to the limit where interference with the bottom wall 20A can be avoided.

1 to 5, a guard member 80 connected to the rear end portion of the body frame 10 prevents the rear end side of the main body portion 70 from coming into contact with other objects from below or from the rear side. is configured to be suppressed. In other words, the guard member 80 is composed of a pipe member formed in a U shape in a plan view, the rear end side of which protrudes rearward from the rear end portion of the fuel tank 4 and the unloader F in the retracted posture. It is provided in a range extending from the left side of the left end of the fuel tank 4 to the right side of the right side of the vertical cylindrical portion 31 of the unloader F in the retracted posture.

As shown in FIG. 1, the position of the rear end of the fuel tank 4 is set to, for example, 30 degrees as the maximum inclination angle α allowed when the self-propelled vehicle A crosses a ridge. Even when the self-propelled body A is tilted backwards up to the maximum tilt angle α, it is set so as to avoid a direct collision with the running ground.
That is, as shown in FIG. 1, the rear end of the fuel tank 4 is positioned such that the line segment connecting the rear end of the main body portion 70 and the rear end of the crawler traveling device 1 substantially coincides with the line segment representing the maximum inclination angle α. side position. In this manner, the position of the rear end side of the fuel tank 4 is extended to the vicinity of the limit position where collision with the running ground can be avoided when the self-propelled body A is tilted to the maximum tilt angle α in a backward tilting posture. As a result, the capacity of the fuel tank 4 can be further increased within the space on the vehicle body frame 10 .
In addition, a guard member 80 extends to the rear from the rear end side of the fuel tank 4 at the lower portion of the fuel tank 4 . The angle β formed by the line segment connecting the rear end of the guard member 80 and the rear end of the crawler traveling device 1 is smaller than the maximum inclination angle α. Therefore, even if the self-propelled body A tries to incline backward beyond the maximum inclination angle α, or if there is a convex portion on the ground side, the guard member 80 first contacts the ground and the self-propelled body A does not move. Since the rearward tilting and the contact of the fuel tank 4 with the protrusion are suppressed, it is easy to avoid the contact of the fuel tank 4 with other objects.

As shown in FIGS. 3, 6, and 8, the main body portion 70 of the fuel tank 4 is detachably fixed to the vehicle body frame 10 by strip-shaped mounting bands 72 at two locations in the front-rear direction.
A belt-shaped mounting band 72 extends from a position below one lateral side of the main body portion 70 of the fuel tank 4 along the outer peripheral surface of the main body portion 70, beyond the upper surface side of the main body portion 70, and downward on the other lateral side. It is formed in a substantially portal shape when viewed in the front-rear direction so as to reach the position.
One end of the mounting band 72 is bent laterally outward and provided as a bent piece 72a having a bolt insertion hole. A locking member 72b having a hole through which a bolt can be inserted from above is welded and fixed to the other end of the mounting band 72 .
Connecting bolts (not shown) are attached to the vehicle body frame 10 at a portion facing the bent piece 72a on the one end side of the mounting band 72 and on the vehicle body frame 10 at a portion facing the locking member 72b on the other end side. Retaining nuts that can be screwed onto 73a and 73b are welded to each. This locking nut is welded to the back side of the upper piece of the channel-shaped frame material that constitutes the body frame 10 .

Accordingly, one end of the mounting band 72 is fixed by inserting the connecting bolt 73a into the bolt insertion hole provided in the bent piece 72a and screwing it with the stop nut on the vehicle body frame 10 side. can do.
On the other end side of the mounting band 72, another connecting bolt 73b is passed through the bolt insertion hole of the locking member 72b, and screwed with the stop nut on the vehicle body frame 10 side to tighten the mounting band 72. The fuel tank 4 can be firmly fixed.

Above the fuel tank 4, as shown in FIGS. 2 to 4 and 8, there is a deck plate 81 provided on the upper right side wall D2 of the threshing device D, and this deck plate 81 serves as fuel. It covers the upper side of the space between the threshing device D and the grain tank E including the tank 4.

[Jack receiver]
As shown in FIGS. 12 and 13, leg frames 10A, 10A for supporting the track frames 1A of the left and right crawler traveling devices 1 under the vehicle body frame 10 are provided at two front and rear portions of the vehicle body frame 10. there is
The two front and rear leg frames 10A, 10A are connected by two connecting plates 10B that are in contact with the front and rear surfaces of the leg frames 10A, 10A, respectively.
A jack receiving plate 90 is welded and fixed to the lower ends of the two connecting plates 10B over the front and rear connecting plates 10B. This jack receiving plate 90 is provided with bent portions 90a bent downward at both left and right end sides of a flat plate.

The jack receiving plate 90 has a length in the left-right direction close to the left-right distance between the upper ends of the left and right leg frames 10A, 10A. , but not over the entire length in the left-right direction, but only a part of the central portion in the left-right direction is welded, as indicated by hatching in the figure.
This is to avoid the effects of distortion due to heat when the jack receiving plate 90 is welded to the connecting plate 10B from affecting the welded portions between the leg frames 10A, 10A and the connecting plate 10B.

By providing the jack receiving plate 90 configured in this way, as shown in FIG. It is useful in that it is easy to avoid a situation in which it breaks. In addition, the bent portions 90a on both end sides of the jack receiving plate 90 are formed to prevent misalignment when the jack 91 is mounted on the end portion of the jack receiving plate 90 when the jack 91 is used to float one side of the track frame 1A. belongs to.

[Another Embodiment 1]
In the embodiment, as shown in FIGS. 3, 4, 6, and 8, the fuel tank 4 has a structure in which the main body portion 70 is formed substantially in the shape of a rectangular box. The fuel tank 4 of the invention is not limited to such a structure.
For example, the configuration shown in FIGS. 14 to 17 may be used.

In this structure, as shown in FIGS. 14 and 15, the fuel tank 4 has a horizontal or substantially horizontal upward surface 74A as a surface forming the upper wall of the main body portion 70, and an upward surface 74A at the bottom of the grain tank E. An outwardly descending inclined surface 74B along the bottom wall 20A corresponding to the downwardly narrowed inclined portion is formed substantially over the entire length in the front-rear direction. The sloped surface 74B extending downward is set at an angle of inclination that is parallel or substantially parallel to the slope of the bottom wall 20A corresponding to the sloped portion of the lower portion of the grain tank E that narrows down. The upward surface 74A and the inclined surface 74B are distributed to the left and right across an imaginary dividing line TCL1 at the center position in the left and right direction so as to cover approximately 1/2 length ranges of the main body portion 70 in the left and right direction. formed in the state.
The upward surface 74A has a fuel filler port 71 standing rearward and upward at a location near the rear end. Also, as shown in FIGS. 16 and 17, a breather 75 for venting air as the internal pressure inside the tank rises is provided near the imaginary dividing line TCL2 at the central position in the longitudinal direction of the upward surface 74A. and a fuel return pipe 76 to which surplus fuel from the engine 3 is returned. The breather 75 and the fuel return pipe 76 are positioned near the center of the area of the fuel tank 4 in a plan view, even in the horizontal direction, so that the upward surface 74A is located at a position corresponding to the middle position in the horizontal direction of the upper wall. is formed in

In this fuel tank 4 , the upward surface 74</b>A and the downwardly inclined surface 74</b>B form the upper wall of the body portion 70 . The inclined surface 74B and the rising wall surface 74C connected to the lower end of the inclined surface 74B form a lateral wall positioned closer to the grain tank E in the body portion 70 of the fuel tank 4. As shown in FIG. Thus, the inclined surface 74B is part of the upper wall of the fuel tank 4 and part of the lateral wall.
Among the lateral walls of the fuel tank 4 configured in this way, which are located on the side closer to the grain tank E, the upper end of the rising wall surface 74C connected to the lower end of the inclined surface 74B is above the lower end of the grain tank E and narrows downward. It is provided at a height position approximately equal to the middle height position of the bottom wall 20A corresponding to the slope of the ball.
Accordingly, although not shown, a filter device for the fuel tank 4 is arranged between the rising wall surface 74C of the fuel tank 4, the lower half side of the bottom wall 20A of the grain tank E, and the upper surface of the vehicle body frame 10. For example, a space is formed that can be used as appropriate for arranging devices.

A bottom wall portion of the main body portion 70 is provided with a discharge port 77 for discharging the fuel oil in the fuel tank 4 . The position where the discharge port 77 is provided is a position corresponding to or near the center of the area of the bottom surface 74D inside the fuel tank 4, as shown in FIGS. That is, the area center of the bottom surface 74D exists at or near the intersection of the virtual dividing line TCL1 at the central position in the horizontal direction and the virtual dividing line TCL2 at the central position in the front-rear direction, and the outlet 77 is located at the intersection. The bottom surface 74D is opened at a position including or near the position.

As shown in FIGS. 16 and 17, the breather 75, the fuel return pipe 76, and the discharge port 77 are all disposed near the center of the area of the fuel tank 4 when viewed from above. There is little possibility that the functions of the breather 75, the fuel return pipe 76, and the discharge port 77 will be impaired due to the attitude change of the running body A.
That is, if the breather 75 and the fuel return pipe 76 are provided near the front end side or the rear end side of the fuel tank 4, as shown in FIG. Therefore, when the fuel tank 4 is tilted in the longitudinal direction, the breather 75 and the fuel return pipe 76 are more likely to be positioned lower than the liquid level FL1 when the liquid level FL1 is high. In comparison, if the breather 75 and the fuel return pipe 76 are arranged at positions close to the center of the area of the fuel tank 4 in a plan view, it is advantageous in that such a situation can be easily avoided. be.
Further, if the discharge port 77 is provided near the end of the fuel tank 4 on the front end side or the rear end side, as shown in FIG. 4 is inclined in the front-rear direction, when the liquid level FL2 is low, the discharge port 77 may be exposed above the liquid level FL2 and the fuel oil in the fuel tank 4 may not be discharged. In comparison, if the fuel tank 4 is arranged at or near the center of the area of the bottom surface 74D of the fuel tank 4, it is advantageous in that such a situation can be easily avoided.

The inclination of the fuel tank 4 due to the attitude change of the self-propelled vehicle A as described above occurs not only in the front-rear direction but also in the left-right direction. Therefore, even if the fuel tank 4 tilts in the left-right direction due to a change in attitude of the self-propelled airframe A, the breather 75 and the fuel There is little fear that the functions of the return pipe 76 and the discharge port 77 will be impaired.

This fuel tank 4 does not have the shape of a rectangular box as shown in FIGS. 4 and 6, but corresponds to a downwardly tapered inclined portion provided at the bottom of the grain tank E as shown in FIGS. 14 to 17. The fuel tank 4 has an inclined surface 74B that faces the bottom wall 20A and follows the inclination of the bottom wall 20A. It has a shape in which the corner portion facing the bottom wall 20A is cut obliquely.
This inclined surface 74B part is provided so as to get under the bottom wall 20A of the grain tank E, and the upward surface 74A part is a lateral wall D2 on the side of the grain tank E in the threshing device D The oil supply port 71, which is located between the side wall and the side wall of the grain tank E and protrudes upward from the upward surface 74A, is also located between the side wall D2 of the grain tank E in the threshing device D and the side wall D2 of the grain tank E on the side of the threshing device D. It is provided so as to be positioned between the side walls (see FIG. 14).
As shown in FIGS. 14 and 18, the fuel tank 4 has a lateral wall facing the threshing device D on the right side of the second reducing device 19 attached to the lateral wall D2 on the grain tank E side of the threshing device D. It is arranged in a state of being located closer to the lateral side wall D2 on the side of the grain tank E in the threshing device D than the end. In addition, the entire fuel tank 4 is located on the rear side of the second reducing device 19 in a range extending from the rear end side of the self-propelled body A to the vicinity of the rear end portion of the second reducing device 19 . The fuel tank 4 arranged in this manner is arranged so as to overlap the second reducing device 19 when viewed in the front-rear direction.
As shown by the phantom lines in FIG. 14, the outer shell of the fuel tank 4 has a higher vertical height than the rectangular box-shaped fuel tank 4 described above, even if the closest distance to the bottom wall 20A of the grain tank E is the same. , and width in the left-right direction are all one size larger, and the overall volume is increased compared to the rectangular box-shaped fuel tank 4 even though the length in the front-rear direction does not change.

As shown in FIGS. 15 to 17, a transparent gauge tube 78 is provided on the outside of the rear surface 74E of the fuel tank 4 and connects the upper portion of the fuel tank 4 with the vicinity of the bottom portion thereof.
Due to the presence of this gauge tube 78, the remaining amount of fuel in the fuel tank 4 can be visually checked from the rear side of the self-propelled vehicle A.
In this embodiment, the upward surface 74A and the inclined surface 74B define the imaginary dividing line TCL1 at the central position in the horizontal direction so that the length range of the body portion 70 is approximately 1/2 in the horizontal direction. An example of a structure formed in a state of being sandwiched and distributed to the left and right was exemplified, but it is not limited to this. For example, the width in the horizontal direction of the upward surface 74A is wider than the width in the horizontal direction of the inclined surface 74B, or conversely, the width in the horizontal direction of the inclined surface 74B is wider than the width in the horizontal direction of the upward surface 74A. and so on.
Further, the positions of the breather 75, the fuel return pipe 76, and the discharge port 77 are not limited to positions near the center of the area of the fuel tank 4 in plan view, and may be arranged at appropriate positions.
Other configurations may employ configurations similar to those of the above-described embodiment.

[Another embodiment 2]
18 and 19 show, as another embodiment, the body frame 10 portion of a combine harvester in which a linear body mounting plate 82 is provided on the body frame 10. FIG.
In this structure, three plate members 83 (corresponding to protruding plate portions) long in the front-rear direction are arranged side by side on the body frame 10 in the space between the threshing device D and the grain tank E. A linear body mounting plate 82 is provided.
As shown in FIGS. 18 and 19, the linear body mounting plate 82 includes plate members 83 each having a mountain-shaped cross-section, which are arranged with a small interval d2 in the left-right direction.
A recessed portion 84 is formed in the linear body mounting plate 82 by slopes 83a of adjacent plate members 83 . A fuel supply pipe 85a and a conductive cable 85b as a linear body 85 are arranged in this recessed portion 84 in a dropped state. At the bottom of the recessed portion 84, a contaminant drop port 84a is provided downward by a small gap d2 formed between adjacent plate members 83. As shown in FIG.

Therefore, it is possible to drop contaminants from the bottom of the recessed portion 84 for stably supporting the linear body 85, and there is an advantage that the tendency of contaminants to accumulate on the bottom of the recessed portion 84 can be reduced. .
The cross-sectional shape of each plate member 83 constituting the linear body mounting plate 82 is not limited to the above-described mountain shape. For example, an appropriate shape such as an upwardly convex half-arc shape or a downwardly-opening channel shape can be adopted. It is preferably formed to have a downwardly tapering slope. Further, the small interval d2 may be set to an appropriate size according to the size of the linear body 85 so that dust and the like can easily fall without dropping the linear body 85 .
Other configurations may employ configurations similar to those of the above-described embodiment.

[3 of another embodiment]
FIG. 20 shows another embodiment of the linear object placing plate 82. As shown in FIG.
The linear body mounting plate 82 has an engagement hole 83b formed in a slope 83a of a plate member 83 having a mountain-shaped cross section. The linear body 85 is held and supported by a fixture 86 made of a band-shaped elastic material such as a rubber band.
The fixture 86 is provided with an engaging body 86a configured to be engageable with and disengageable from an engaging hole 83b formed in the slope of the plate member 83. The engaging body 86a is engaged with the engaging hole 83b. Thus, the linear body 85 can be securely locked and supported at the middle position of the slope 83 a of the plate member 83 located on one side of the recessed portion 84 .
In this way, when the linear body 85 is locked and supported in the midway position of the slope 83a of the plate member 83 positioned on one side of the recessed portion 84, the linear body 85 and the plate member 83 positioned on the other side of the recessed portion 84 are locked and supported. This is advantageous in that a gap is generated between the slope 83a and the contaminants more easily migrate to the contaminant drop opening 84a side.
Other configurations may employ configurations similar to those of the above-described embodiment.

[4 of another embodiment]
FIG. 21 shows another embodiment of a common combine.
This ordinary combine harvester is equipped with an operation section B and a pre-reaping treatment device C at the front part of a self-propelled machine A, and a threshing device of a whole culm-throwing-in type into which grain stalks reaped by the pre-reaping treatment device C are fed. D and a grain tank E (corresponding to a grain storage unit) for storing grains supplied from the threshing device D are provided at the rear part of the self-propelled machine body A.
Glen tank E has a working posture (posture indicated by a solid line in FIG. It is supported so as to be switchable between an inspection posture (posture indicated by phantom lines in FIG. 21) projecting laterally from A.

The unloader F provided at the rear of the grain tank E includes a vertical transport cylinder 28 that transports grains upward, and a horizontal transport cylinder 29 that is connected to the upper end of the vertical transport cylinder 28 and transports grains in the horizontal direction. , and is configured to discharge the grains from the conveying end portion of the horizontal conveying cylinder 29 .
The horizontal conveying cylinder 29 is configured to be capable of turning and swinging around the cylinder axis of the vertical conveying cylinder 28. coincides with the vertical axis Y2 of .

The fuel tank 4 is positioned on the vehicle body frame 10 at a location corresponding to the rear end portion of the self-propelled vehicle body A between the grain tank E and the threshing device D, and is located laterally from the location where the vertical axis Y2 exists. It is arranged so as to be located on the inner side of the self-propelled body A. Therefore, even if the grain tank E and the unloader F turn around the vertical axis Y2 in the vertical posture, the grain tank E and the unloader F that are turned can easily avoid the possibility of interfering with the fuel tank 4. can be done.
Other configurations may employ configurations similar to those of the above-described embodiment.

[5 of another embodiment]
In the embodiment, the structure using the hydraulic cylinder 60 as the rocking drive device for rocking the unloader F is shown, but the structure is not limited to this.
For example, the swing driving device may be a winch that winds up a wire connected to the vertical tubular portion 31 of the unloader F, and that the winch is driven forward and backward by an electric motor. Moreover, it does not interfere even if it does not use a rocking|swiveling drive device.
Other configurations may employ configurations similar to those of the above-described embodiment.

[6 of another embodiment]
In the embodiment, the hydraulic cylinder 60 as a swing drive device for raising and lowering the unloader F is arranged across the mounting bracket 42 extending from the grain tank E and the unloader F, but the structure is limited to this structure. It is not something that can be done.
For example, an appropriate configuration can be employed, such as arranging the hydraulic cylinder 60 across the unloader F and a dedicated member provided on the mounting frame 40 separately from the mounting bracket 42 .
Other configurations may employ configurations similar to those of the above-described embodiment.

[7 of another embodiment]
In the embodiment, a structure in which the mounting frame 40 is provided with the receiving portion 44 for maintaining the retracted posture of the unloader F is shown, but the present invention is not limited to this.
For example, the receiving portion 44 may be configured as a separate member from the mounting frame 40 and provided at another location on the self-propelled body A instead of on the mounting frame 40 .
Other configurations may employ configurations similar to those of the above-described embodiment.

[8 of another embodiment]
In the embodiment, the discharge-side end of the unloader F is configured to tilt toward the inside of the self-propelled vehicle A in the retracted posture, but the configuration is not limited to this.
For example, in the stored posture of the unloader F, the discharge side end may stand upright on the swing axis X of the unloader F, or may be slightly tilted outward of the self-propelled vehicle A.
Other configurations may employ configurations similar to those of the above-described embodiment.

[9 of another embodiment]
In the embodiment, the double-acting type hydraulic cylinder 60 is exemplified as the hydraulic cylinder 60 that telescopically operates, but the hydraulic cylinder 60 may be configured as a single-acting type without being limited to this. In this case, when the discharge side end of the unloader F is configured to tilt toward the inside of the self-propelled machine body A in the retracted posture, the unloader F in the retracted posture is positioned to stand upright on the swing axis X. It is desirable to provide an urging spring or the like to return to the position.
Other configurations may employ configurations similar to those of the above-described embodiment.

[10 of another embodiment]
In the embodiment, the structure using the grain tank E with the unloader F was exemplified as the grain storage part, but it is not limited to this. For example, as for the configuration other than the configuration related to the unloader F, a combine having a structure using a hopper having a take-out opening at the bottom without being provided with the unloader F or the grain tank E may be employed. In this case, it is sufficient to manually open and close the take-out opening of the hopper so that the grains can be taken out, and the bagging work or the like is performed.
Other configurations may employ configurations similar to those of the above-described embodiment.

The present invention can be applied not only to ordinary combine harvesters but also to self-threshing combine harvesters.

2 driver's seat 3 engine 4 fuel tank 10 body frame 19 second reducing device 30 elbow part 71 fuel filler port 80 guard member 85a fuel supply pipe B driving part D threshing device E grain storage part (grain tank)
F Unloader

Claims (9)

The threshing device and the grain storage unit are installed side by side on the vehicle body frame,
A fuel tank is disposed at a rear portion between the threshing device and the grain storage unit,
An elbow portion of an unloader that discharges grains from the grain storage unit is provided behind the grain storage unit,
The fuel tank is provided with a lower end of the fuel tank located below a lower end of the elbow portion,
A guard member for restricting contact of other objects from the lower side with the fuel tank is provided in a state of protruding rearward from a portion of the rear end portion of the vehicle body frame corresponding to the threshing device ,
The combine harvester is arranged so that the fuel tank overlaps with the grain storage section in plan view and does not overlap with the grain storage section in rear view . 2. The combine according to claim 1, wherein the fuel tank has a fuel filler port extending upward from the fuel tank and provided between the threshing device and the grain storage section as viewed in the longitudinal direction of the machine. . 3. The combine according to claim 1 or 2, wherein the fuel tank is disposed at a position overlapping with a second reducing device provided on a side portion of the grain storage section side of the threshing device as viewed in the longitudinal direction of the machine body. . 4. The combine according to claim 3, wherein said fuel tank is arranged behind said second reducing device. 5. The combine according to claim 3, wherein said fuel tank is arranged adjacent to the rear end of said second reducing device. A driving unit is provided in front of the grain storage unit,
An engine is arranged below a driver's seat in the driver's seat,
The combine according to any one of claims 1 to 5, wherein the fuel supply pipe is provided along the body frame located below the grain storage section. 7. The fuel tank according to any one of claims 1 to 6, wherein the fuel filler port of the fuel tank is provided at a rear portion of the fuel tank so as to face rearward and to be adjacent to the guard member in plan view. combine. The combine according to claim 7, wherein the oil filler port is provided so as to overlap with the existence range of the guard member in plan view. the guard member restricts contact of another object from below with respect to the elbow portion;
The combine according to any one of claims 1 to 8, wherein the elbow portion is provided so as to overlap with the existence range of the guard member in plan view.

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