JP3459371B2 - Superstructure after tractor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear upper structure of a tractor in which a floor sheet is arranged at the rear of a tractor vehicle body.

[0002]

2. Description of the Related Art For example, in an agricultural tractor, as disclosed in Japanese Unexamined Patent Publication No. 190908/1990, a hydraulic device for raising and lowering a working machine is mounted on the rear portion of a tractor body.
A floor seat provided between the left and right fenders is arranged on the upper side of the hydraulic device, a seat is provided on the upper side of the floor seat, and the floor seat is provided with an opening through which the hydraulic device is projected. Further, Japanese Patent No. 2645792 discloses a seat device for an industrial vehicle in which a seat can be rotated and held backward together with an engine hood.

[0003]

In the former prior art, only the hydraulic system can be inspected by removing the seat, but it is difficult to inspect the equipment around the hydraulic system and the equipment behind the tractor. Also, the opening for projecting the hydraulic device is not closed, and noise from below the floor seat propagates upward through the opening.
Further, the noise becomes even louder when the seat is surrounded by a cabin, which makes it difficult to apply to a tractor with a cabin.

In the latter prior art, since the entire engine hood is rotatable, the structure is exaggerated and heavy rather than opening and closing the inspection window locally, making it difficult to perform inspection work. It has a structure that is difficult to apply to. By the way, generally, the seat is configured so that the seat can be lifted up and tilted forward around the front part so that the seat surface does not get wet with rain, that is, it can be retracted from the normal position. The presence of the walls and the rear glass of the cabin makes the distance between them and the seat in the retracted position too wide and difficult to open.

It is an object of the present invention to provide a tractor rear upper structure capable of solving various problems of the prior art. According to the present invention, the floor sheet is provided with an opening portion facing the upper rear portion of the tractor vehicle body, and the opening portion can be opened and closed by the lid body, so that the rear upper portion of the tractor vehicle body can be easily and easily inspected and noise is reduced. It is an object of the present invention to provide a tractor rear superstructure capable of limiting upward propagation of a tractor. According to the present invention, a lid that closes an opening portion of a floor seat is lifted rearward through a rear pivot portion in a state where a seat is rotated forward through the front pivot portion and floated up. It is an object of the present invention to provide a rear upper structure for a tractor that allows the seat to be retracted far away and allows the space above the opening to be widely opened.

[0006]

A first concrete means for solving the problems in the present invention is to arrange a floor seat 16 provided between the left and right fenders 10 on the upper side of the rear part of the tractor vehicle body 2. The seat 4 is arranged on the upper side of the floor seat 16, the floor seat 16 is provided with an opening 17A facing the upper rear portion of the tractor vehicle body 2, and a lid 20 for closing the opening 17A is attached to the front or rear of the floor seat 16. Branch S
It is to be opened and closed via.

As a result, when the lid 20 is rotated to open the opening 17A, the upper rear portion of the tractor vehicle body 2 can be seen, and when the lid body 20 is closed, noise from the tractor vehicle body 2 side is reduced. Limit upward propagation. A second specific means for solving the problems in the present invention is, in addition to the first specific means, provided with a seat support device 32 on the lid body 20,
That is, the seat 4 is rotatably attached to the seat support device 32 via the pivot S of the lid 20 on the opposite side of the pivot S.

As a result, the seat 4 is rotatable on the side opposite to the direction in which the lid 20 is rotated, and the seat 4 can be retracted far away from the opening 17A. A third concrete means for solving the problem in the present invention is to arrange a floor seat 16 provided between the left and right fenders 10 on the upper side of the rear part of the tractor vehicle body 2, and arrange the seat 4 on the upper side of the floor seat 16. The floor seat 16 is provided with an opening 17A facing the upper rear part of the tractor vehicle body 2, and a lid 20 for closing the opening 17A is provided on the floor seat 16 via a rear pivot SR so as to be openable and closable. A seat support device 32 is provided on the body 20,
The seat 4 is rotatably attached to the seat support device 32 via the front pivot support portion SF, and the seat support device 32 is rotated while the seat 4 is rotated forward via the front pivot support portion SF to float. That is, it can be lifted via the rear branch SR.

As a result, when the lid 20 is rotated around the rear part to open the opening 17A, the upper rear part of the tractor body 2 can be seen, and when the seat 4 is rotated around the front part. The seat 4 can be retracted far away from the opening 17A rearward. The fourth concrete means for solving the problems in the present invention is the concrete means according to any one of the first to third aspects, and the seat support device 32 is attached to the lid body 20 through the elastic support means 37. And the upper member 38 which is mounted on the lower member 36 via the slide means 39 so that the front-rear position can be changed and on which the seat 4 is mounted via the pivot S.

As a result, even if the lid 20 can be opened and closed, the seat 4 can be elastically supported and the longitudinal position can be adjusted. The fifth concrete means for solving the problems in the present invention is the floor sheet for accommodating at least a lower portion of the seat supporting device 32, in addition to any one of the first to fourth concrete means. 16 has a recessed portion 31 which is recessed below the lid attachment portion 17a. This makes it possible to lower the height of the seat 4 by sinking the seat support device 32 from the upper surface of the floor seat 16.

A sixth concrete means for solving the problems in the present invention is that, in addition to any one of the first to fifth concrete means, a hydraulic device 23 is mounted on the rear upper portion of the tractor body 2.
That is, the opening 17A is arranged to face the hydraulic device 23 so that it can be inspected. As a result, the opening 17A
Therefore, the hydraulic equipment 23 at the upper rear portion of the tractor body 2 can be inspected. The seventh concrete means for solving the problems in the present invention is, in addition to any one of the first to sixth concrete means, the lid 20 is fixed to the floor sheet 16 with the opening 17A closed. It has a fixing means 30.

As a result, the openable / closable lid 20 can be fixed to the floor sheet 16 in the closed state of the opening 17A. Eighth concrete means for solving the problem in the present invention arranges a floor seat 16 provided between the left and right fenders 10 on the upper side of the rear part of the tractor vehicle body 2, and arranges the seat 4 on the upper side of the floor seat 16. The floor seat 16 has an opening 17 facing the upper rear portion of the tractor vehicle body 2.
A is provided, and the lid 20 that closes the opening 17A is provided on the floor sheet 16 via the rear pivot portion SR so as to be openable and closable.
A seat support device 32 is provided on the lid body 20, the seat 4 is rotatably attached to the seat support device 32 via a front pivot portion SF, and the seat 4 is rotated forward through the front pivot portion SF. The seat support device 32 in a state where the seat support device 32 is raised to the rear support SR
And the floor sheet 16 surrounds the seat 4 to form a floor slab of the cabin 1 mounted on the tractor body 2. The cabin 1 connects the left and right fenders 10 and the rear portion. That is, it has a connecting body 43 that forms a lower portion of the window 45 and a rear glass 44 that opens and closes the rear window 45.

As a result, when the lid 20 is pivoted about the rear part to open the opening 17A and the seat 4 is pivoted about the front part, it projects rearward from the rear window 45 that opens the seat 4. It becomes possible to retreat to the state and the opening 17
It is possible to open the upper space above A. In addition to the eighth specific means, a ninth specific means for solving the problem in the present invention is such that the distance between the front and rear pivot parts SF and SR is set to a height from the rear pivot part SR to the connecting body 43. The size is set to be approximately the same or longer.

As a result, the seat 4 protruding from the rear window 45 can be evacuated in a substantially horizontal or rearward downward shape. The tenth concrete means for solving the problems in the present invention is, in addition to the eighth or ninth concrete means, opened the rear glass 44 to rotate the seat 4 forward through the front pivot support SF. With the seat supporting device 32 lifted rearward via the rear pivot SR, the seat 4 is connected to the connecting body 43.
It is configured so that it can be placed and held on the. As a result, the seat 4 that protrudes from the rear window 45 and is retracted in a substantially horizontal or rearward downward shape can be stably placed and held on the connecting body 43.

In the eleventh concrete means for solving the problems in the present invention, in addition to the eighth or ninth concrete means, the floor sheet 16 has a rear rising wall 18 forming a lower rear wall of the cabin 1. Then, the rear glass 44 is opened to rotate the seat 4 forward through the front pivot portion SF and the rear pivot portion SR.
The seat support device 32 is lifted rearward through the rear support wall 18 or the connecting body 43.
It is configured so that it can be leaned back and held. As a result, the seat 4 that protrudes from the rear window 45 and is retracted in a substantially horizontal or rearward downward shape is stably held by leaning the seat support device 32 against the rear standing wall 18 or the connecting body 43. It will be possible to leave.

A twelfth concrete means for solving the problems in the present invention is the same as any one of the first to eleventh concrete means, and the hydraulic equipment 23 is mounted on the rear upper part of the tractor body 2. At least one of the working machine lifting hydraulic cylinder 7A, the control valve 53 controlling the working machine lifting hydraulic cylinder 7A, and the control valve 54 controlling the other hydraulic device 59 mounted on the tractor body 2. is there. Accordingly, when the lid 20 is rotated to open the opening 17A, it is possible to inspect the working machine lifting hydraulic cylinder 7A, its control valve 53, the control valve 54 of another hydraulic device 59, and the like. .

A thirteenth concrete means for solving the problems in the present invention is the same as any one of the first to eleventh concrete means, and the hydraulic equipment 23 is mounted on the upper rear portion of the tractor body 2. It is a control valve 53, and a working machine lifting hydraulic cylinder 7A controlled by the control valve 53 is attached to the rear surface of the tractor body 2. As a result, when the lid 20 is rotated to open the opening 17A, the control valve 53 for the working machine lifting hydraulic cylinder 7A.
It is possible to inspect the and the floor sheet 16 to be positioned closer to the tractor body 2 ing.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1, 7, and 8, the tractor exemplifies a type in which the cabin 1 is mounted on the upper rear portion of the tractor vehicle body 2. The cabin 1 is mounted on the tractor vehicle body 2 via a vibration-proof support, and the steering handle 3, It surrounds a steering and driving device that is configured by arranging a steering panel, a seat (driver's seat) 4 and the like in front and rear. The tractor body 2 is constructed by directly connecting a transmission case to an engine, and is provided with a hydraulic device (hydraulic cylinder) 7 for raising and lowering a working machine having a pair of left and right lift arms 6 at the rear part thereof. Reference numeral 8 indicates the left and right rear wheels.

In the cabin 1, the ceiling 9 and the left and right fenders 10 for the rear wheels are connected by the rear support 11, and the ceiling 9 and the left and right steps 12 are connected by the front support 13 to form a cabin skeleton. The ceiling 9, the fender 10, the step 12, etc. are made of sheet metal, synthetic resin or the like, and the rear support 11 and the front support 13 are made of sheet metal, synthetic resin, steel pipe or the like. The left and right steps 12 are integrally formed so as to straddle the two members or the tractor vehicle body 2, form an entrance / exit of the cabin 1, and the entrance / exit is opened and closed by a door 15 swingable about the X axis.

The left and right fenders 10 have an upright portion 10A and a top plate portion 10B which is an arcuate front downward shape covering the rear wheel 8 at the upper portion thereof, and a rib 10C is provided on the upright portion 10A. By being formed, its rigidity is improved. The left and right end plates of the floor sheet 16 made of sheet metal are joined to the upright portions 10A of the left and right fenders 10 by spot welding, flange bolt coupling, or the like. 1 to 6, the floor seat 16 is also supported by a support frame 14 provided on the upper part of the tractor vehicle body 2, and a seat mounting portion 17 in which the seat 4 is disposed and a rear portion of the seat mounting portion 17 from the rear side. The rear standing wall 18 rising in an inclined shape and the seat mounting portion 17
Of the seat mounting portion 17 and the step portion 19 are formed by bending a single sheet metal and integrally forming the rear rising wall 18 with another member. Seat mounting unit 17
Is stuck to.

The seat mounting portion 17, the rear rising wall 18 and the step portion 19 may be integrally formed, or may be formed by fixing a plurality of sheet metals by welding or the like. Further, they are integrally formed of synthetic resin. Alternatively, it may be divided into a plurality of pieces and fixedly formed by bolts or the like. Further, the step 12 is formed by arranging one or more sheet metals on the upper portion of the tractor vehicle body 2 and connecting the sheet metal to the lower portion of the step portion 19 of the floor seat 16 via a fixing tool. The sheet metal forming the sheet can also be regarded as a part of the floor sheet 16, and can be integrally formed with the floor sheet 16.

The floor sheet 16 forms the floor slab of the cabin 1 together with step 12, and the seat mounting portion 1
An opening (inspection window) 17A is formed substantially at the center in the left-right direction from 7 to the step portion 19, and the opening 17A can be opened and closed by a lid body (seat attachment body) 20. The rear standing wall 18 is erected upright behind the backrest of the seat 4, and is located at a lower rear surface portion 18A that rises from the rear end of the seat mounting portion 17 and slightly rearward from the lower rear surface portion 18A. Upper back surface portion 18B and upper and lower back surface portions 18A, 18
It has an article storage section 18C provided between B, and a peep window 18b is formed in the upper back section 18B so that the driver can see the lower rear of the tractor, and the article storage section 18C can store tools and the like. It has become.

The step portion 19 is arranged so as to straddle the upper portion of the tractor vehicle body 2, and is formed with a notch portion 22 or the like through which the diff lock lever 21 is projected. Seat mounting unit 17
Is a hydraulic device 23 mounted on the upper rear portion of the tractor body 2.
Is provided on the upper side so as to cover the vehicle, and is supported by the support frame 14 so as to be able to carry the seat load. The left and right side portions have openings for projecting the gear shift lever, the hydraulic operation lever, and the like from below to above. 24 and 25 are formed, and the opening 17A is located between the openings 24 and 25.

A lid 20 that closes the opening 17A.
Has a peripheral portion overlapping with the seat mounting portion 17 and the lid mounting portion (opening peripheral edge) 17a of the step portion 19, and the rear portion thereof is located at the rear portion of the seat mounting portion 17 at the rear pivot portion SR.
Is rotatably supported around a horizontal horizontal axis having an axis in the left-right direction. The left and right side portions, the front portion and the like of the lid body 20 are fixed to the seat mounting portion 17 and the step portion 19 via fixing means 30, respectively. If there is one fixing means 30 in the front portion, it can be fixed. It is preferable to provide at least one on each of the left and right side portions and the front portion. The fixing means 30 may be a bolt / nut, but it is preferable to use a knob bolt, a wing nut, or the like, which enables the fixing work without using a fastening tool.

It should be noted that the lid 20 is biased in the opening direction between the front portion of the lid 20 and the seat mounting portion 17, or the lid 2
A damper that carries a load of 0 may be provided. The central portion of the lid body 20 has a lid body mounting portion 17 of the seat mounting portion 17.
A recess 31 that is recessed below a is formed, and a seat support device 32 is disposed in this recess 31. The bottom of the recess 31 is inclined forward and downward, and the seat support device 3
Although substantially the entire number 2 is accommodated, the depth may be such that only the lower portion of the seat support device 32 is accommodated. Left and right mounting portions 31A are formed on the bottom of the recess 31 of the lid body 20, brackets 33 are fixed to the left and right mounting portions 31A, and the lower portions of the parallel links 34 are pivotally supported by the left and right brackets 33, respectively. A suspension spring 35 is provided between the bracket 33 and the parallel link 34 to support the lower member 36 so that the parallel link 34 can move up and down, and to urge the parallel link 34 in the upward direction. 35A shows a knob for adjusting the spring force.

The parallel link 34, the spring 35, etc. constitute an elastically supporting means 37 for elastically supporting the lower member 36 attached to the lid 20. This elastically supporting means 3
7 may include a cushioning body made of rubber or the like for preventing a collision between the lid 20 side and the lower member 36 side. The lower member 36 is provided with a pair of left and right lower rails 36A. The lower rail 36A extends in the front-rear direction and engages with the upper rail 38A of the upper member 38 so as to be slidable back and forth. The upper and lower rails 38A, 36A and the like constitute a slide means 39 that allows the upper member 38 to be adjusted in the front-back position. Also,
The upper and lower rails 38A form a part of the upper and lower members 38 and 36, respectively.

Although not shown, the slide means 39 is not shown.
Locking means is provided for locking the upper rail 38A with respect to the lower rail 36A at the adjustment position. The upper member 3
A front pivot portion SF having an axial center in the left-right direction is provided at the front portion of 8, and the front portion of the seat surface portion of the seat 4 is supported rotatably about a horizontal horizontal axis via the front pivot portion SF. ing. Also,
A cushion 40 for elastically supporting the rear portion of the seat 4 is provided between the rear portion of the upper member 38 and the rear lower surface of the seat surface portion of the seat 4. The lower member 36, the elastically supporting means 37, the upper member 38, the sliding means 39, the front and rear pivot portions SR, SF, etc. constitute a seat supporting device 32 for mounting and supporting the seat 4 on the lid 20.

In the above structure, the seat 4 has the front pivot S
By rotating in the forward direction around F and tilting it forward,
It is possible to prevent rainwater from splashing on the seat surface, and when the seat 4 is tilted forward, the upper and lower members 38, 36 and the peripheral portion of the lid 20 are exposed, and the fixing means 30 is also exposed. After releasing, the lid 20 is moved to the rear pivot SR
Rotate backward around the center to start up, and open the opening 17A
Further, the seat 4 is largely lifted upward with the movement of the front end of the lid 20, and is retracted far rearward and upward as shown by a chain double-dashed line in FIG.

The cabin 1 shown in FIGS. 1, 7 and 8 is
The rear strut 11 is arranged (standing) slightly to the rear side of the seat 4 rather than right next to the seat 4, and the upper and lower ends of the rear strut 11 are extended rearward via the connecting body 43, whereby the rear glass 4
A rear window 45 that is opened and closed at 4 is formed. Rear window 4
The frame 5 has a U-shape or a U-shape in a plan view which connects the left and right rear columns 11 and the lower end portions of the rear column 11 or the upper ends of the left and right fenders 10 to each other. And an upper connecting member which is U-shaped or U-shaped in a plan view and which connects the upper end portions of the left and right rear columns 11 to each other, and the connecting body 43 is substantially the floor sheet 16. Forming the upper edge of the rear rising wall 18 at, while the upper connecting member substantially forms the rear edge of the ceiling 9.

The upper portion of the rear glass 44 is pivotally supported on the ceiling portion 9 side so as to be swingable around a horizontal axis, and is rotated to rotate the rear window 4.
When opening 5, the connecting body 4 forming the lower edge of the rear window 45
3 is exposed. In this state, the above-mentioned lid 4 is raised and the seat 4 that has floated up is projected from the rear window 45 to the outside so that it can be retracted rearward and upward from the normal position where the driver is seated, and the projected seat. The seat surface portion 4 can be placed and held on the connecting body 43. At this time, the seat support device 32 is slightly tilted rearward, and the seat 4 is placed on the connecting body 43 to maintain the posture.

That is, the distance between the front and rear pivot portions SF and SR is set to be substantially the same as or longer than the height dimension from the rear pivot portion SR to the connecting body 43. Even if the length of the lower member 36 is shorter than the height dimension from the rear pivot support SR to the connecting body 43, the front and rear positions are changed by using the slide means 39 so that the upper member 38 projects from the lower member 36. By doing so, the front support portion SF can be lifted to a position higher than the connecting body 43. Further, when the seat 4 is projected from the rear window 45, the seat support device 32 is brought into contact with the lower rear surface portion 18A, or the upper rear surface portion 18 is formed by extending the lower rear surface portion 18A.
B and the connecting body 43 may be positioned, and the seat support device 32 in a rearward tilted posture may be brought into contact with them so as to lean back and hold the seat support device 32. The seat 4 protruding from the rear window 45 may be substantially horizontal or rearward. It is preferable that the seat support device 32 is retracted downward and the seat support device 32 is placed in a backward tilted posture.

In FIGS. 1, 7 and 9, a working machine such as a rotary cultivator can be mounted on the rear part of the tractor body 2 via a three-point link mechanism 51. A hydraulic device 7 for raising and lowering the working machine, a rolling drive device 52 for performing a rolling operation, control valves 53, 54 for controlling these devices, and the like are arranged.
The three-point link mechanism 51 includes a pair of left and right lower links 5.
1A and one top link 51B, the hydraulic device 7 is provided with a hydraulic cylinder 7A on the rear rear surface of the tractor body 2, and a support base 56 is attached to a lid 55 on the upper rear part of the tractor body 2. The lift arm 6 pivotally supported by 56 and the left and right lower links 51A are connected by a lift rod 58, and the lift arm 6 is driven up and down by a hydraulic cylinder 7A.

In the rolling drive device 52, one of the left and right lift rods 58 is formed by a hydraulic cylinder 59 that is expandable and contractible, and the left and right lift rods 58 are made different in length, so that the working machine can be rolled left and right. There is.
The control valve 53 for the hydraulic device 7 and the control valve 54 for the rolling drive device 52 are mounted on a lid 55 at the upper rear part of the tractor vehicle body 2, and an oil passage is formed inside the lid 55 to form hydraulic pressure. It is part of the circuit. The control valve 53 includes an elevating control valve section 53A and a falling speed adjusting section 53B.
It is divided into and.

The hydraulic system 7 and its control valve 53,
The rolling drive device 52 and its control valve 54, etc.
The hydraulic equipment 23 is configured. As the hydraulic equipment 23, the hydraulic cylinder 7A may be arranged at the upper rear portion of the tractor body 2 and the lift rod 6 may be swung by the cylinder rod. When the hydraulic cylinder 7A is provided on the rear rear surface of the tractor vehicle body 2, the control valves 53, 54 and the like may be arranged on the upper rear portion of the tractor vehicle body 2. Therefore, the height can be reduced and the floor seat 16 can be attached to the tractor vehicle body 2. It is useful for lowering the height of the seat 4 and lowering the ceiling height of the cabin 1.

As described above, the hydraulic equipment 23 at the upper rear portion of the tractor vehicle body 2 is made lower by applying a device having a small vertical width to form a recess 31 in the lid 20 to seat the seat support device 32. It is possible to dispose the mounting portion 17 by sinking it from the upper surface. However, the tractor body 2
When arranging the hydraulic cylinder 7A in the upper rear part,
0 is a plate member having no recess 31 or a plate member having a raised central portion. The opening 17A of the floor sheet 16 faces the hydraulic equipment 23 at the upper rear portion of the tractor vehicle body 2, and by opening the lid 20, maintenance and inspection of the hydraulic equipment 23 can be performed, and sufficient operation is possible. The opening 17A is formed to have a size of.

The present invention is not limited to the above embodiment, but can be variously modified. For example,
A lid 20 for closing the opening 17A is provided on the floor seat 16 so as to be openable and closable via a front pivot portion SF, and the seat 4 is rotatably attached to a seat support device 32 via a rear pivot portion SR,
The seat 4 may be retractable in the vicinity of the steering wheel 3. Further, hydraulic equipment 23 arranged at the top after preparative Rakuta body 2, the control valve 53, control valve 54, may be only one of such as a hydraulic cylinder 7A.

[0037]

According to the present invention described in detail above, the lid 20 is provided.
When the tractor body 2 is opened by rotating the
The rear upper part can be seen, the hydraulic equipment 23 and the like on the rear upper part of the tractor body 2 can be inspected, and when the lid 20 is closed, upward propagation of noise from the tractor body 2 side can be limited. The lid 20 is rotated with respect to the floor sheet 16, and the seat 4 is rotated with respect to the lid 20 to open the seat 4 at the opening 17A.
In the tractor with a cabin, the seat 4 can be evacuated rearward from the open rear window, and the space above the opening 17A can be greatly opened. The state can be surely maintained.

The seat 4 in the regular position can be elastically supported and adjusted in the front-rear position, and the seat supporting device 32 can be depressed from the upper surface of the floor seat 16 to lower the height of the seat 4 and the lid body. the opening and closing operation of 20 is also Ru can be easily.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional side view of a main portion on the seat seat surface side.

FIG. 3 is an enlarged cross-sectional side view of a main part on the seat back side.

FIG. 4 is a plan view of a floor sheet and a lid.

FIG. 5 is a front view of a floor sheet, a lid, a seat, and the like.

FIG. 6 is an enlarged front view of the main part of FIG.

FIG. 7 is a side view of the upper rear portion of the tractor with a cabin.

FIG. 8 is a side view of the cabin with the rear glass open.

FIG. 9 is a plan view of the upper rear portion of the tractor vehicle body.

[Explanation of symbols]

1 cabin 2 tractor body 4 seats 7 hydraulic system 10 fenders 16 floor sheet 17 Seat mounting section 17A opening 18 Rear wall 19 step 23 Hydraulic equipment 30 fixing means 31 recess 32 seat support device 36 Lower member 37 bullet support means 38 Upper member 39 Slide means 43 connected body 44 rear glass 45 rear window 53 Control valve 54 Control valve SF front branch SR posterior branch

   ─────────────────────────────────────────────────── ─── Continued front page       (56) Reference JP-A-10-304711 (JP, A)                 Actual Kaihei 6-1139 (JP, U)                 Actual Kaihei 3-112481 (JP, U)                 Actual public Sho 63-13064 (JP, Y1)

Claims (5)

(57) [Claims] 1. A seat mounting portion in which a floor seat provided between left and right fenders is disposed above a rear portion of a tractor vehicle body, and a seat is disposed on the floor seat, and a rear portion of the seat mounting portion.
After standing up from the floor sheet of the floor sheet
The seat mounting part has an opening facing the upper rear part of the tractor vehicle body, and a lid for closing the opening is pivotally supported to the seat mounting part.
It is provided so that it can be opened and closed via the
A recess recessed below the seat mounting part lid attachment part
And at least the lower part of the seat support device is
The seat is provided in a retracted state, and the seat is provided with a front support part for the seat support device.
Mounted rotatably through the seat through the front pivot
The lid and the seat are rotated in the forward direction and floated.
Raise the support device via the rear pivot and take a slightly rearward tilting posture.
Proximity to rear riser to tilt and seat upright
A tractor rear superstructure, which can be placed above the tractor. 2. A tractor vehicle body on the rear rear surface of the tractor vehicle body.
Swing the lift arm for lifting work equipment that is pivotally supported at the rear upper part.
A hydraulic cylinder is installed in the rear of the tractor body.
A control valve is installed to control the hydraulic cylinder for lifting the work implement.
The upper and lower control valves on the rear of the tractor body.
Place the floor sheet installed between the
The opening facing the control valve, and this opening
The closing lid is opened and closed on the floor sheet via the rear pivot.
The seat support device on the lid,
The seat is rotatably attached to the holding device via the front pivot support,
The floor seat surrounds the seat and is mounted on the tractor body.
This cabin forms the floorboard of the cabin that is
Connects the left and right fenders and forms the lower part of the rear window.
It has a united body and a rear glass that opens and closes the rear window.
The distance between the front and rear pivots should be adjusted to the height from the rear pivot to the connecting body.
Set the length to be approximately the same as the length, and open the rear glass.
Pivot the seat forward through the front pivots and rear pivots
State of lifting the lid and seat support device rearward via the
The seat can be placed and held on the connecting body.
The upper structure of the tractor after that. 3. The lid is at least below the seat support device.
Parts in order to house the, than the lid mounting portion of the full Roashito
3. A recessed portion which is recessed downwardly.
Superstructure after tractor described in . 4. The floor sheet includes a lower rear wall of the cabin.
It has a rear standing wall to be formed, and the rear glass is opened and seated.
Rotate the seat forward through the front pivot and through the rear pivot.
And lift the seat support device to the rear,
The holding device can be held by leaning against the rear rising wall or the connecting body.
The tractor rear upper structure according to claim 2 or 3 , wherein the tractor rear upper structure is formed. 5. The seat supporting device is provided with an elastic support means.
A lower member attached to the lid, and a sliding means on the lower member.
The seat is mounted so that the front and rear position can be changed via the
The tractor rear upper structure according to any one of claims 1 to 4, further comprising: an upper member attached via the .