JP2001080549A - Riding type working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate rearside confirmation and an operation for an operation lever of a hydraulic system, when a power tiller and the like is equipped in a rear part of a tractor body. SOLUTION: A cab 8 is provided on a tractor body 2, and a fitting part for installing a working equipment 13B such as a power tiller is provided in a rear part of the body 2. The cab 8 is supported turnably around a supporting shaft 46 via a posture setting means 70, the cab 8 is allowed to be set in left and right diagonally frontward postures, getting-in and -out onto the cab 8 is facilitated by bringing the cab 8 into the left diagonally frontward posture, and confirmation for rearside work and an operation of an operation lever 50 are facilitated by bringing the cab 8 into the right diagonally frontward posture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle such as a tractor for performing work by attaching a work device such as a cultivator to a rear portion of a vehicle body.

[0002]

2. Description of the Related Art As a passenger work vehicle such as a tractor, a driver's seat is provided on a tractor body supported by a pair of left and right front and rear wheels so as to be able to travel, and a steering handle, a getting on / off step, etc. are provided in front of the driver's seat. A control section is provided, and working equipment such as a cultivator and plow can be attached to the rear of the tractor body.
A general configuration is provided with a mounting portion such as a point link and a hydraulic device for raising and lowering the working device. In some cases, operation levers of a hydraulic device for performing draft control and position control of a working device are provided on the left and right sides of a driver's seat.

[0003]

When performing work while moving forward with a cultivator mounted on the rear part of a tractor, the operator often twists his upper body greatly rearward in order to check the work state behind. It is necessary to perform visual check or the like, and if such a checking operation is repeatedly performed in a long-time work, there is a problem that the degree of fatigue of the worker increases and the work efficiency deteriorates. Also, when operating the operation lever of the hydraulic device, the operator has to twist the body slightly to the side, which is difficult to operate.

[0004] On the other hand, in a tractor, since the steering handle is arranged close to the front side of the driver's seat, there is also a problem that the legs touch the steering wheel when getting on and off and it is difficult to get on and off. The present invention has been made in view of the above-described circumstances, and has as its object to provide a passenger work vehicle capable of improving workability such as backward confirmation and operation of an operation lever, and improving the getting on and off.

[0005]

The present invention employs the following technical means to achieve the above object. That is, the passenger work vehicle according to the present invention is provided with a driver's seat on a vehicle body capable of traveling by wheels, a mounting portion of a working device is provided at a rear portion of the vehicle body, the attitude of the driver's seat, the vehicle body Attitude setting means for setting a forward state along the traveling direction and a leftward and forward diagonal state is provided. According to this, when a work device such as a cultivator is mounted on a rear portion of a vehicle body such as a tractor, and the work is performed by the work device while traveling, the posture of the driver's seat is set to a diagonally forward and leftward state. This makes it possible to easily check the work state without having to twist the upper body backward greatly, thereby reducing the burden on the operator. When operation levers such as a hydraulic device for lifting and lowering the working device are provided on the left and right sides of the driver's seat, the posture of the driver's seat is set to a diagonally forward posture on the operation lever side. Operation becomes easy.

In addition, even when the steering wheel is arranged close to the front of the driver's seat, getting on and off can be easily performed by setting the posture of the driver's seat to a diagonally forward state facing the entrance side. Become like By the way, there has been conventionally known a work vehicle called a TLB having a front loader provided at a front portion of a tractor vehicle body and a backhoe provided at a rear portion (for example, see Japanese Patent Application Laid-Open No. 9-9713). In this configuration, there is provided a configuration having a posture setting means for setting the posture of the driver's seat on the vehicle body to a forward state facing the front loader side (front side in the traveling direction) and a rearward state facing the backhoe side. .

[0007] In addition, this work vehicle can be obtained by removing the backhoe and mounting another work device such as a cultivator.
The rearward work can be performed while the tractor is traveling forward. In this case as well, the above-described workability problems such as rearward confirmation and the problem of getting on and off arise. Therefore, the present invention can solve the conventional problems by adding a function of setting the driver's seat posture to the left and right diagonally forward state to such a driver's seat posture setting means in the work vehicle. It was taken.

That is, the passenger work vehicle according to the present invention is provided with a driver's seat on a vehicle body that can be driven by wheels, and a mounting part of a working device at a rear portion of the vehicle body, and the posture of the driver's seat is adjusted. In a passenger work vehicle provided with posture setting means for setting a forward state and a rearward state along the traveling direction of the vehicle body, the posture setting means sets the posture of the driver's seat in a left-right diagonally forward direction. It is also characterized by having a function of setting the posture. With such a configuration, when a working device such as a backhoe is attached to the rear portion of the vehicle body, the operation of the backhoe and the like can be performed by setting the posture of the driver's seat to the rearward facing state, When the work equipment is installed, the driver's seat can be set to the diagonally forward position to easily check the rear and operate the operation levers on the side of the driver's seat. By setting the posture to the diagonally forward state facing the entrance, the driver can easily enter and exit the vehicle without the steering handle becoming an obstacle.

In the case where an operation lever for raising and lowering the working device is provided on one of the left and right sides of the driver's seat, a rotation supporting the driver's seat so as to be rotatable about a vertical axis is used as posture setting means. It is preferable to have a structure having a dynamic support portion, a lock portion for locking the rotation of the driver's seat in a predetermined posture, and a restricting portion for restricting the rotation of the driver's seat toward the operation lever.
Thus, by rotating the driver's seat about the vertical axis, the posture can be changed to the forward state, the obliquely forward state, or the rearward state, and further, it can be positioned at each position by the lock portion. In addition, by restricting the rotation of the driver's seat toward the operation lever by the restricting portion, interference between the driver's seat and the operation lever is prevented, thereby preventing the operation lever from being operated by mistake. Becomes

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 7 shows a passenger work vehicle of the present invention exemplified by the tractor 1, and the tractor 1
A tractor body 2 including an engine, a transmission case, and the like is provided.
It has. A mounting frame 11 is provided on the lower side of the tractor body 2 along the front-rear direction.
Front loader 12 at the front of the rear (first mounting part) 1
A backhoe (working device) 13A is detachably attached to 1A.
It constitutes a working vehicle called a front loader / backhoe.

As shown in FIG. 8, when the backhoe 13A is detached from the rear portion 11A of the mounting frame 11, another working device 1 such as a tilling machine is provided via a second mounting portion 10 such as a three-point link.
3B can be mounted. At the rear upper part of the tractor body 2, there are provided a hydraulic device 5 for lifting and lowering the working device 13B mounted on the three-point link 10, and a floor sheet 6 for covering the hydraulic device 5 from above. , A driver's seat 8 is provided via a support device 7. A wheel fender 9 that covers the front and upper sides of the rear wheel 4 is attached and fixed to the left and right sides of the floor sheet 6 via fasteners such as bolts.

A rear side of the mounting frame 11 is fixedly mounted on a rear axle case 14 projecting left and right outward from the tractor body 2. The lower end is attached and fixed. As shown in FIGS.
The rear end of the wheel fender 9 is connected to the support piece 16 via a connecting tool such as a bolt, and the wheel fender 9 is also supported by the rope 15. As shown in FIGS. 5 and 7, the backhoe 13 includes a machine frame 21 detachably connected to a rear portion 11 </ b> A of the mounting frame 11, and an excavator 22 provided at a rear portion of the machine frame 21. The excavator 22 includes a turning frame 23 pivotally supported by the machine frame 21 so as to be able to swing left and right, a boom 24 having a base pivotally supported by the turning frame 23 so as to be able to swing up and down, and a boom 24.
Arm 25 whose base is pivotally supported on the upper part of
And a bucket 26 pivotally supported at the front end of the arm 25 so as to be able to swing back and forth, and the turning frame 23, the boom 24,
The arm 25 and the bucket 26 include a swing cylinder 27, a boom cylinder 28, and a hydraulic cylinder, respectively.
The swing operation is performed by the arm cylinder 29 and the bucket cylinder 30.

A tractor body 2 is provided above the machine frame 21.
A step 31 is provided that protrudes forward toward the side, and an operation box 33 having an operation lever 32 and the like is erected on the step 31. On both left and right sides of the machine frame 21, stabilizers 34 are provided via a bracket so as to be vertically swingable by a swing cylinder 35. As shown in FIG. 1, on the tractor body 2 in front of the driver's seat 8, a steering section 43 having a steering handle 40, a control floor 41, a pedal device 42 and the like is provided. That is, the driver's seat 8 is positioned diagonally forward and left and right of the driver's seat 8.
Entry / exit 44 is formed.

As shown in FIG. 4, the upper surface of the floor sheet 6 on the right side of the driver's seat 8 is formed one step higher through a stepped portion 6a. A plurality of operation levers 50 such as an operation lever for control and a sub-transmission lever of a traveling system are provided in a concentrated manner. Further, on the floor seat 6 on the left side of the driver's seat 8 and between the wheel fender 9 on the left side, it is configured such that an operator can pass back and forth between the control floor 41 and the step 31. A passage 52 is formed.

A cover member 5 having a guide groove for guiding the swing of the operation lever 50 is provided on the base side of the operation lever 50.
The cover member 53 is bolted to the floor sheet 6 and is also connected to the right wheel fender 9 by bolts. Therefore, the cover member 53 is connected to the wheel fender 9.
Has a function as a reinforcing member. On the other hand, the passage 52 is formed on the same plane (at the same level) as the mounting portion of the support device 7 for supporting the driver's seat 8, and has a step member 55 having a non-slip function on its upper surface. Is attached.

The step member 55 is made of a metal plate having a rectangular shape in a plan view. As shown in FIG. 6, the step member 55 has a large number of holes 56 on its plate surface and protrudes upward around the holes 56. It has a non-slip function. In addition, bolts 5
7 and the bolt 57 is
The step member 55 is fixed on the floor sheet 6 by being screwed into a nut 58 provided on the lower surface of the floor sheet 6. At the left end of the step member 55, the wheel fender 9
And a connecting piece 59 bent upward along the side surface of the connecting piece 59. The connecting piece 59 and the fender 9
It is connected by a fastener consisting of a 0 and a nut 61. Therefore, like the cover member 53 on the right side of the driver's seat 8, the step member 55 has a structure having a function of reinforcing the wheel fender 9, so that vibration of the fender 9 can be prevented. Has become.

The step member 55 includes bolts 57,
By unfastening the nut 60 and the nuts 58 and 61, it is possible to remove it from the floor seat 6 and the wheel fender 9. By removing the mud, mud and the like adhering to the step member 55 can be easily dropped and exchanged. It is easy to do. In addition, as the step member 55, a plate material having no hole 56 such as a strip steel plate may be used, or an elastic material such as a rubber mat may be attached to the surface of a metal plate material. It is also possible to attach a rubber mat directly on the floor sheet 6.

The surface of the floor sheet 6 can be provided with an anti-slip function by forming irregularities on the surface thereof. However, since it is difficult to remove mud as described above, the floor sheet 6 must be provided separately from the floor sheet 6. It is preferable that the step member 55 be provided detachably. Between the left and right wheel fenders 9, the support device 7 is provided at the left and right central portions of the floor sheet 6, and the support device 7, as shown in FIGS. A posture setting means 70 for setting the posture (directivity angle) to a predetermined value is provided. This posture setting means 7
Reference numeral 0 denotes a rotation support portion 71 that rotatably supports the driver's seat 8 around a vertical axis, a lock portion 72 that locks the rotation of the driver's seat 8 in a predetermined posture (angle), And a regulating portion 73 for regulating the rotation of the seat 8 toward the operation lever 50 (right side) in a predetermined manner.

The rotation support portion 71 includes a base member 45 fixed to the floor sheet 6 and a seat table 4 rotatably provided on the base member 45 via a vertical support shaft 46.
The driver's seat 8 is supported by slide rails 48 provided on the left and right sides of a seat table 47 so that the front and rear positions can be adjusted. As shown in FIG. 3, the lock portion 72 includes a lock piece 75 provided rotatably about a horizontal axis with respect to a bottom plate of the seat table 47.
The lower end portion of the base member 5 penetrates through the bottom plate and protrudes downward, and is detachably provided in an engagement hole 76 formed in the upper plate of the base member 45.

A lever 77 is provided below the front of the driver's seat 8 so as to be rotatable around the horizontal axis. The lever 77 and the lock piece 75 are connected by a push-pull cable 78. The lock piece 75 is swung up and down by the push-pull operation of the push-pull cable 78 by rotating the 77, so that the lock piece 75 can be disengaged from the engagement hole 76. As shown in FIG. 2, the engagement hole 76 is
A front engagement hole 76A disposed on the base line X along the front-rear direction (running direction) of the tractor body 2 passing through the center and forward of the support shaft 46; The rear engagement hole 76B arranged on the side and the front side of the support shaft 46,
A right engagement hole 76R disposed on a base line XR inclined about 15 ° rightward from the base line X about the support shaft 46;
6 and a left engagement hole 76L disposed on a base line XL inclined about 30 ° to the left from the base line X about the support shaft 46 as a center.

Therefore, the driver's seat 8 can be horizontally rotated through the rotation supporting portion 71 in a state where the lock pieces 75 are disengaged from the respective engagement holes 76, and the lock pieces 75 are moved to the front engagement holes 76A.
When the right engagement hole 76R is engaged with the rear engagement hole 76B, the right engagement hole 76R is set to the front posture (the state 8A in FIG. 1). When engaged with, it is positioned and fixed in a diagonally right forward posture along the base line XR (in the state of FIG. 8R), and when engaged with the left engagement hole 76L, in a diagonally forward left posture along the base line XL (in the state of 8L). It has become so.

As shown in FIG. 2, the regulating portion 73 includes a pair of front and rear contact members 80A provided on the base member 45.
80B and the contact member 8 provided on the seat table 47.
When the driver's seat 8 turns to the left from a state in which the driver's seat 8 faces forward, a rearward posture (8B) is obtained. The contact member 81 contacts the rear contact member 80B,
Further rotation to the right is restricted. Further, when the driver's seat 8 turns rightward from a state facing the rear side, the driver's seat 8 turns to a predetermined obliquely forward facing posture (8R).
The contacted member 81 comes into contact with 0A, and further rotation to the right is restricted.

Therefore, the driver's seat 8 can be freely turned to the left but can be freely turned to the right. This restriction causes the driver's seat 8 to come into contact with the operation lever 50 and to be erroneously operated. We are trying to prevent such things.
In the above configuration, when simply moving the tractor 1 or performing work by the front loader 12, the driver's seat 8 is set to the forward posture (8A) along the traveling direction via the posture setting means 70. Thus, the operator can operate the steering handle 40 and the like and the operation lever of the front loader 12.

When shifting to the excavation work by the backhoe 13, the posture setting means 70
The driver's seat 8 is inverted to the rearward posture (8R) via the. At this time, since the plurality of operation levers 50 are arranged in a concentrated manner on the right side of the driver's seat 8, a wide passage 52 space (rotation space of the driver's seat 8) is formed on the left side. The driver's seat 8 is prevented from interfering with the operation lever 50 by turning a part of the seat 8 having a large turning radius (the front part of the driver's seat 8 in the illustrated example) leftward toward the passage 52 side.

Therefore, the driver's seat 8 is placed in a forward posture (8A).
And the rearward posture (8B) can be horizontally rotated at the same level, and the reversing operation can be performed quickly and easily with a simple structure without a mechanism for elevating the driver's seat 8 in order to avoid the operation lever 50. You can do it. In addition, since the rotation of the driver's seat 8 to the right is restricted by the restricting portion 73, interference with the operation lever 50 is also prevented. After changing the driver's seat 8 to the rearward posture (8B), the operator moves from the control floor 41 to the step 31 of the backhoe 13 through the passage 52 and sits on the driver's seat 8 so that the operator can operate the operating lever 3 of the backhoe 13.
2 can be operated.

Therefore, the worker can quickly move to the backhoe 13 side on the tractor body 2 without getting down to the ground, so that the labor required for the movement can be reduced and the next work can be immediately started. Efficiency can be improved. In addition, since the mud on the ground is less likely to run on the backhoe 13 side, cleaning and the like can be easily performed. In order to shift from the operation of the backhoe 13 to the traveling movement of the tractor 1 and the operation of the front loader 12, the operation reverse to the above may be performed.

As shown in FIG. 8, when the backhoe 13 is removed and the tilling machine 13B is mounted on the three-point link 10, the driver's seat 8 is tilted rightward and forward (8R) via the attitude setting means 70. Set to. At this time, since the driver's seat 8 is slightly inclined toward the operation lever 50, the operation lever 50 can be easily operated without greatly twisting the upper body. It can be easily confirmed without a large twist, and the burden on the operator is reduced.

Here, the reason why the directional angle of the driver's seat 8 in the diagonally forward right direction is set to about 15 ° is that if it is more than this, the traveling operation of the tractor 1 becomes difficult. This is because it becomes difficult to operate the lever 50 as in the related art. When getting on and off the tractor body 2,
The driver's seat 8 is set to the diagonally forward left posture (8L) via the posture setting means 70. As a result, the driver's seat 8 faces the left entrance 44, so that the driver can easily get on and off without the steering handle 41 being in the way.

At this time, the driver's seat 8 can be set in a diagonally forward right posture to get on and off the vehicle from the right entrance 44.
Since the inclination angle is set as small as 15 °, it is easier to get on and off from the left side. The present invention
The design can be changed as appropriate without being limited to the above embodiment.
For example, the obliquely forward directional angle of the driver's seat 8 is not limited to the above, and the arrangement of the regulating portion 73 (contact member, contacted member) is appropriately changed according to the rotation range of the driver's seat 8. You can do it. In addition, the driver's seat 8 may be set to an obliquely forward facing posture of only one of the left and right.

The left and right arrangement of the passage 52 on the tractor body 2 and the operation lever 50 is not limited to the above, and may be reversed. Further, the driver's seat 8 is not limited to the one in which the posture is changed by horizontal rotation, and may be configured to be detachable from the floor seat 6 and be changed to each posture. The present invention is not limited by the presence or absence of the front loader 12 at the front part of the vehicle body 2, and the working device mounted on the rear part of the vehicle body 2 is not limited to the backhoe 13A or the cultivator 13B, and is replaced by another working device. You can also
The mounting parts 11A and 10 may have other configurations such as a hitch. Further, the work vehicle 1 is not limited to the above-described TLB, and may be a general tractor that does not include the mounting frame 11 as a mounting portion.

[0031]

As described above in detail, according to the present invention, by setting the posture of the driver's seat so as to be forward and obliquely in the left-right direction, it is possible to confirm the rearward operation and to operate the operation lever on the side of the driver's seat. It can be easily performed, and getting on and off the driver's seat can be easily performed.

[Brief description of the drawings]

FIG. 1 is a plan view of a rear side of a tractor according to an embodiment of the present invention.

FIG. 2 is a plan view of a posture setting unit.

FIG. 3 is a side view of the same.

FIG. 4 is a rear view of the tractor.

FIG. 5 is a side view of the rear side of the tractor.

6 is a front sectional view (an enlarged view of a portion A in FIG. 2) of a step member.

FIG. 7 is a side view showing a state in which a backhoe is attached to a rear part of the tractor.

FIG. 8 is a side view showing a state in which a cultivator is mounted on a rear part of the tractor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor (passenger work vehicle) 2 Tractor body 8 Driver's seat 11A Rear part (first mounting part) of mounting frame 11 10A Three-point link (second mounting part) 13A Backhoe (working equipment) 13B Tiller (working equipment) 50 Operation Lever 70 Posture setting means 71 Rotation support part 72 Lock part 73 Restriction part

Claims (3)

[Claims] An operator's seat (8) is provided on a vehicle body (2) which can be driven by wheels (3, 4), and a mounting part (10) for a working device (13B) is provided at a rear portion of the vehicle body (2). And a posture setting means (70) for setting the posture of the driver's seat (8) to a forward state along the traveling direction of the vehicle body (2) and a diagonally forward state in the left-right direction. A passenger work vehicle. 2. A driver's seat (8) is provided on a vehicle body (2) that can be driven by wheels (3, 4), and a mounting portion of a working device (13A, 13B) is provided at a rear portion of the vehicle body (2). (11A, 10), and posture setting means (70) for setting the posture of the driver's seat (8) to a forward state and a rearward state along the traveling direction of the vehicle body (2). Wherein the attitude setting means (70) also has a function of setting the attitude of the driver's seat (8) to a horizontal, obliquely forward attitude. . 3. An operation lever (50) for operating the working device (13B) on one side of the driver's seat (8).
The attitude setting means (70) is provided with a rotation support part (71) for rotatably supporting the driver's seat (8) around a vertical axis, and a driver's seat (8) in a predetermined attitude. ) And a restricting portion (73) for restricting rotation of the driver's seat (8) toward the operation lever (50).
The passenger work vehicle according to claim 1, further comprising: