Work vehicle

Abstract

To provide a work vehicle improved in workability and safety of maintenance by solving the problems in a combine harvester having, at a left side of an operation seat, an operation section in which operation members such as a control lever and a dial are integrally arranged, in which maintenance work of removing a side face cover of the operation section and exposing the inside is hard to be performed, and when a main switch is turned on or an engine is operated during maintenance work, a machine body is operated by careless operation to cause a problem of safety.SOLUTION: In a work vehicle which is equipped with a work device and provided with a control panel 35 having operation sections 38, 39, 42 in the vicinity of an operation seat 21: the control panel 35 can be switched to between a working state of performing work and a non-working state of performing maintenance; and when the control panel 35 is in a non-working state, a control device stops the operation of a machine body, and the operation of a part or all of the operation sections 38, 39, 42 is disabled.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a work vehicle equipped with a work device.

Background Art

[0002] There is known a combine harvester provided with an operation unit in which various operation levers such as a main transmission lever and operation members such as dials are centrally arranged on the left side of the operator's seat (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Maintenance work on various electrical components, cables, and mechanical transmission members such as links inside the operation unit is performed by removing the side cover of the operation unit to expose the inside. However, since the operator's seat is close by, there is a problem that maintenance work is difficult to perform.

[0005] Also, if the main switch is turned on or the engine is operated during maintenance work, the machine body may move due to inadvertent operation, or the cutting device or threshing device may start to move, posing a problem in safety and also risking damage to the machine body.

[0006] The present invention has been made in view of the above, and provides a work vehicle with improved workability and safety in maintenance.

Means for Solving the Problems

[0007] The first aspect of the present invention is in a work vehicle equipped with a working device (6, 15) and provided with an operation panel (35) having operation parts (38, 39, 42) near the operator's seat (21), the operation panel (35) can be switched between a working state in which work is performed and a non-working state in which maintenance is performed. When the operation panel (35) is in the non-working state, the control device stops the operation of the machine body and invalidates some or all of the operations of the operation parts (38, 39, 42), the operation panel (35) is configured to open to a non-working state in which the rear part is pivotally supported by a pivot shaft (34) and the front part pivots upward and stands up. The determination of the working state and the non-working state is performed by a switch provided on the pivot shaft (34) side, detection of the rotation angle, or detection of a switch provided on the front side of the operation panel (35) or that the front side is in contact with a fixed part and grounded to the body, a gripping grip (36) used for switching operation and gripping is provided on the front side of the operation panel (35) so as to protrude upward from the operation panel (35). The gripping grip (36) is located on the front side of the machine body with respect to the main speed change lever (38) and is accommodated within the vertical height of the main speed change lever (38). A work vehicle characterized by this. According to the first aspect of the present invention, inadvertent operation of the machine body due to instability of the operation parts 38, 39, 42 is prevented, improving safety and preventing damage to the machine body. Furthermore, by determining the working state and the non-working state by electrical detection, even though the operation panel 35 is in the working state, operation of the machine body is not accepted due to false detection, preventing the waste of extra time for work. Furthermore, by gripping the gripping grip 36, the operation panel 35 can be easily switched between the operating state and the non-operating state. In the operating state, when the operator stands up from the operator's seat 21 and operates each part, by gripping the gripping grip 36, it functions as a grip for preventing falls and is safe. The second aspect of the present invention is a work vehicle according to the first aspect of the present invention, characterized in that an inner protruding part (37) that protrudes toward the operator's seat (21) on the right side of the operation panel (35) and is inclined so as to be lower inward is provided, and an accelerator volume (39) for adjusting the output of the engine is provided on the side of the inner protruding part (37) close to the operator's seat (21). The third aspect of the present invention is A switch panel (37) is provided with a low-speed switch (42) for fixing the traveling speed to low speed on the front side of the operation panel (35), behind the gripping grip (36), and on the right side of the main shift lever (38). The low-speed switch (42) is provided on a lower low-speed switch mounting surface (41) formed on either the left or right side of the front side of the switch panel (37), and the upper end of the low-speed switch (42) is set at the same height as the upper surface of the switch panel (37). This is the first working vehicle of the present invention characterized by the above. The first invention related to the present invention In a work vehicle equipped with work devices 6 and 15 and provided with an operation panel 35 having operation units 38, 39, and 42 near an operator's seat 21, the operation panel 35 can be switched between a work state in which work is performed and a non-work state in which maintenance is performed. When the operation panel 35 is in the non-work state, the control device stops the operation of the machine body and invalidates some or all of the operations of the operation units 38, 39, and 42.

[0008] The first invention related to the present invention According to this, when the operation panel 35 is in the non-work state, the control device stops the operation of the machine body and invalidates some or all of the operations of the operation units 38, 39, and 42. Therefore, it is possible to prevent accidental operation of the machine body caused by instability of the operation units 38, 39, and 42, improve safety, and also prevent damage to the machine body.

[0009] The second invention related to the present invention The operation panel 35 is configured to open to a non-work state in which the rear part is pivotally supported by a pivot shaft 34 and the front part pivots upward and stands up. The determination between the work state and the non-work state is performed by a switch provided on the pivot shaft 34 side, detection of the rotation angle, or detection of a switch provided on the front side of the operation panel 35 or that the front side is in contact with a fixed part and grounded to the body. The first invention related to the present invention It is a work vehicle of.

[0010] The second invention related to the present invention According to the present invention, the operation panel 35 is configured to open in a non-operating state where the rear part is pivotally supported by a pivot shaft 34 and the front part rotates upward and stands up. The determination of the operating state and the non-operating state is performed by detecting a switch provided on the pivot shaft 34 side or the rotation angle, or by detecting a switch provided on the front side of the operation panel 35 or the detection of the body grounding when the front side contacts the fixed part. Therefore, by determining the operating state and the non-operating state by electrical detection, even though the operation panel 35 is in the operating state, the operation of the aircraft cannot be accepted due to false detection, and it is possible to prevent wasting extra time in the work.

[0011] In addition, even though the operation panel 35 is in the non-operating state, it is possible to appropriately prevent a situation where the operation of the aircraft is accepted due to false detection and the aircraft operates, and the safety of the work is ensured.

[0012] The third invention related to the present invention is a work vehicle in which a grip 36 used for switching operation and gripping is provided on the front side of the operation panel 35 so as to protrude upward from the operation panel 35, and the grip 36 is located on the front side of the aircraft with respect to the main transmission lever 38 and is within the vertical height of the main transmission lever 38. The first or second invention related to the present invention

[0013] The third invention related to the present invention According to the present invention, since the grip 36 used for switching operation and gripping is provided on the front side of the operation panel 35 so as to protrude upward from the operation panel 35, it is possible to easily switch the operation panel 35 between the operating state and the non-operating state by gripping the grip 36. In the operating state, when the operator stands up from the operator's seat 21 and operates each part, by gripping the grip 36, it functions as a grip for preventing falling and is safe.

[0014] In addition, since the grip 36 is located on the front side of the aircraft with respect to the main transmission lever 38 and is within the vertical height of the main transmission lever 38, it is not necessary to make the grip 36 overly large, and an increase in weight and cost can be prevented.

[0015] The fourth invention related to the present invention ​has an inner protruding portion 37 that protrudes toward the operator's seat 21 on the right side of the operation panel 35 and is inclined so as to be lower toward the inside, and an accelerator volume 39 for adjusting the output of the engine is provided on the side of the inner protruding portion 37 closer to the operator's seat 21 The third invention related to the present invention is a work vehicle.

[0016] The fourth invention related to the present invention According to this, since an inner protruding portion 37 that protrudes toward the operator's seat 21 on the right side of the operation panel 35 and is inclined so as to be lower toward the inside is provided, and an accelerator volume 39 for adjusting the output of the engine is provided on the side of the inner protruding portion 37 closer to the operator's seat 21, the frequently used accelerator volume 39 can be arranged within the reach of the hand of the operator sitting on the operator's seat 21, and the visibility and operability are good.

[0017] The fifth invention related to the present invention is provided with a switch panel 37 having a low-speed switch 42 for fixing the traveling speed to low speed on the front side of the operation panel 35, on the rear side of the grip 36, and on the right side of the main transmission lever 38. The low-speed switch 42 is provided on a lower low-speed switch mounting surface 41 formed on either the left or right side of the front side of the switch panel 37, and the upper end of the low-speed switch 42 is set to the same height as the upper surface of the switch panel 37 The third invention related to the present invention is a work vehicle.

[0018] The fifth invention related to the present invention According to this, since the low-speed switch 42 is provided, when moving to the work start position or the like, the operator does not need to finely adjust the traveling speed, and the operability and workability are improved.

[0019] Also, since a switch panel 37 having a low-speed switch 42 for fixing the traveling speed to low speed is provided on the front side of the operation panel 35, on the rear side of the grip 36, and on the right side of the main transmission lever 38, the low-speed switch 42 is provided on a lower low-speed switch mounting surface 41 formed on either the left or right side of the front side of the switch panel 37, and the upper end of the low-speed switch 42 is set to the same height as the upper surface of the switch panel 37, the operator can easily operate without changing the posture, can confirm the operation state of the low-speed switch 42 only by changing the line of sight, and can prevent misoperation.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0021] Hereinafter, a combine 1 which is an example of a work vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings. For the sake of easy understanding, for the convenience of explanation, the front side is referred to as the front side, the rear side as the rear side, the right hand side as the right side, and the left hand side as the left side when viewed from the operator, but the configuration is not limited by these.

[0022] <Overall Configuration of Combine> As shown in FIG. 1, the combine 1 is provided with a traveling device 4 in which a pair of left and right traveling crawlers 3 that travel on the soil surface are stretched on the lower side of the vehicle body 2, and on the left and right of the vehicle body 2, a threshing device 6 as a working device for threshing and sorting the grain straws that are clamped and conveyed by the feed chain 5, a grain tank 7 as a storage device for temporarily storing the grains, a discharge auger 8 for discharging the grains stored in the grain tank 7 to the outside of the machine is placed and arranged, and a straw discharging processing device 9 is mounted on the rear end portion of the threshing device 6. The discharge auger 8 rises and falls by operating the auger lifting cylinder when discharging the grains.

[0023] In front of the threshing device 6, there is a weeding body 11 that weeds uncut cereal straws from the front end side, a lifting part 12 that lifts the weeded cereal straws, a cutting blade part 13 that cuts the lifted cereal straws, and a supply adjustment conveying part that rakes in the cut cereal straws and adjusts the handling depth during conveyance and transfers them to the feed chain 5. The cutting device 15 as a working device is configured to be suspended and disposed at the front end of the vehicle body 2 so as to be movable up and down with respect to the soil surface by a cutting elevation cylinder.

[0024] An operation part 20 for operating and controlling the combine 1 and an operation seat 21 on which the operator sits are provided at the upper right rear side of the cutting device 15. An engine is mounted below the operation seat 21, the grain tank 7 is arranged at the rear side, a cabin 23 that covers the operation part 20 and the operation seat 21 is provided, and these traveling devices 4, threshing device 6, cutting device 15, operation part 20, engine, cabin 23, etc. are mounted on the vehicle body 2 of the combine.

[0025] The cabin 23 is configured in a box shape by providing a cabin roof 25 on the upper part of a cabin frame 24 whose base is fixed to the vehicle body 2, and is equipped with a door 26 whose front side with a right glass window 26a provided on the right side surface is open and closed, a left glass window 27 on the left side surface, a front glass window 28 on the front side surface, and a rear glass window 29 on the rear side surface.

[0026] <Operation part 20> As shown in FIGS. 2 to 6, the operation part 20 is composed of a front operation part 20F provided in front of the operation seat 21 in the cabin 23 and a side operation part 20S provided on the left side of the operation seat 21.

[0027] On the front operation unit 20F, a steering lever 30 is provided to operate the left and right traveling actuators that operate the left and right side clutches and left and right side brakes of the left and right traveling crawlers 3, 3 by tilting operations to the left and right, causing left and right steering during straight travel and turning in various turning modes, and to operate the mowing lift cylinder by an operation in the front-rear direction to raise and lower the mowing device 15. An armrest 31 is provided for the operator sitting on the operator's seat 21 to place their hand when operating the steering lever 30. A main monitor 32 is provided to display an alarm for a full grain tank when a full cup sensor detects that the grain in the grain tank 7 is full, an alarm for running out of fuel when a fuel level sensor detects that the fuel in the fuel tank is running low, and various support items from the control device.

[0028] Note that the main monitor 32 is fixed and provided on the front right side of the operation panel 35 described later, and when the operation panel 35 is opened in the non-working state where it stands upright, it moves upward and rotates integrally.

[0029] On the side operation unit 20S, an operation panel 35 is provided at the upper part, with the rear part pivotally supported by a pivot shaft 34 in the left-right direction of the machine body, and the front part rotating upward to open in the non-working state where it stands upright.

[0030] At the front end of the operation panel 35, a rotating grip 36 is provided as a resin-made inverted U-shaped gripping grip. By gripping the rotating grip 36 and rotating it to lift the front part of the operation panel 35 upward, the operation panel 35 is opened in the non-working state for performing maintenance work.

[0031] Also, in the working state where the operation panel 35 is closed, the rotating grip 36 is located at the front left side of the front operation unit 20F at the front end of the side operation unit 20S (in front of the main transmission lever 38 and to the right and lower than the grip 38a of the main transmission lever 38). Therefore, the visibility is good, and when the operator stands up from the operator's seat 21 to operate each part, by gripping the rotating grip 36, it also functions as an anti-fall grip, which is safe.

[0032] On the front right side of the operation panel 35, there is a switch panel 37 which is an inner protruding portion that protrudes toward the inside of the cabin 23 (operator's seat 21) and is inclined so as to be lower toward the inside.

[0033] On the front left side of the operation panel 35, there is a main shift lever 38 for operating a shift actuator (HST) that switches forward and backward movement and main shift by the forward and backward operations of the operator sitting on the operator's seat 21.

[0034] On the switch panel 37, there is an accelerator volume 39 for adjusting the output of the engine at a position very close to above the knees of the operator sitting on the operator's seat 21 on the protruding portion side.

[0035] Also, the accelerator volume 39 is arranged on the side (operator's side) that does not obstruct the operation movement path of the main shift lever 38 on the forward operation direction side from the neutral position of the main shift lever 38.

[0036] Therefore, since the accelerator volume 39 is provided at the position closest to the operator sitting on the operator's seat 21 of the switch panel 37, the visibility and operability are good.

[0037] On the rear side of the switch panel 37 where the accelerator volume 39 is provided, there are a rolling volume 40a for operating the left - right inclination of the machine body and a lift volume 40b for operating the ground working height of the mowing device 15 on the side farther from the operator's seat 21 than the accelerator volume 39.

[0038] A low - speed switch mounting surface 41 which is one step lower is provided by cutting diagonally the side farther from the operator's seat 21 at the front of the switch panel 37, and a low - speed switch 42 for fixing the traveling speed to low speed is provided on the low - speed switch mounting surface 41.

[0039] Note that the low - speed switch mounting surface 41 is configured to be wider than the low - speed switch 42 and is configured so that the operator can press it even when wearing work gloves.

[0040] When the low-speed switch 42 is pressed, the transmission actuator (HST) is activated to a predetermined low-speed state, fixing the traveling speed at a low speed.

[0041] Therefore, since the low-speed switch 42 is provided, the operator does not need to finely adjust the traveling speed when moving to the start position of work, etc., improving the operability and workability.

[0042] Also, the low-speed switch 42 is located in front of the machine body relative to the forward maximum speed position where the main transmission lever 38 is operated most forward on the right side (inside the cabin 23) of the main transmission lever 38. The operator can easily operate it without changing their posture, and the operating state of the low-speed switch 42 can be confirmed only by changing the line of sight.

[0043] Also, the low-speed switch 42 is provided at a position lower than the upper end of the rotation grip 36. When not being pressed, the upper end of the low-speed switch 42 is at the same height as the upper surface of the switch panel 37 or slightly protruding. When pressed, the upper end of the low-speed switch 42 becomes lower than the upper end of the switch panel 37, preventing misoperation.

[0044] And behind the switch panel 37, a cutting operation lever 43 for turning on and off the operation of the cutting device 15 is provided.

[0045] Also, behind the main transmission lever 38, a drink holder 44 and a 12V socket 45 are provided.

[0046] Note that the main transmission lever 38, the accelerator volume 39, the rolling volume 40a, the lifting volume 40b, the low-speed switch 42, the cutting operation lever 43, etc. are the operation parts of the present invention.

[0047] On the other hand, a determination device is provided to determine whether it is a working state with the operation panel 35 closed or a non-working state where the front part rotates upward and opens and stands up around the rear pivot shaft 34.

[0048] The determination device is a switch provided at the pivot shaft 34 part at the rear of the operation panel 35, which detects and determines the working state where the operation panel 35 is closed, and sends the determination information to the control device.

[0049] Note that instead of the switch provided at the pivot shaft 34 part at the rear of the operation panel 35, variable sensors such as a potentiometer or an angle sensor may be used.

[0050] Also, the determination device may be a switch provided at a fixed part that detects the lower side of the front part of the operation panel 35 in the working state where the operation panel 35 is closed. Further, a jumper wire connected to the control device may be assembled to the unpainted part on the lower side of the front part of the operation panel 35, and it may be detected and determined that the unpainted part on the lower side of the front part of the operation panel 35 is in contact with the fixed part and is grounded.

[0051] When the operation panel 35 is opened and set to the non - working state of standing up for maintenance, the determination device sends the determination information that the operation panel 35 is in the non - working state to the control device. The control device sets the engine to the stopped state (makes it impossible to start the engine and stops the engine if it is running), prevents the accidental operation of the aircraft caused by the instability of various operation levers and switches, improves safety, and can also prevent damage to the aircraft.

[0052] Also, when the operation panel 35 is opened and set to the non - working state of standing up for maintenance, the determination device sends the determination information that the operation panel 35 is in the non - working state to the control device, and the control device may make it impossible to turn on the main switch.

[0053] Also, when the operation panel 35 is opened and set to the non - working state of standing up for maintenance, the determination device sends the determination information that the operation panel 35 is in the non - working state to the control device, and the control device may invalidate the use of each operation lever such as the main transmission lever 38 of the operation panel 35 and various electrical components such as the accelerator volume 39.

[0054] In the figure, a brake pedal 51 and a footrest 52 are provided on the floor 50 part inside the cabin 23, and a remote control 53 is equipped at the right end of the front operation unit 20F. Further, an entrance / exit step 54, a handrail 55, a side mirror 56, and a headlight 57 are provided outside the door 26.

Explanation of Signs

[0055] 6 Working device (threshing device) 15 Working device (mowing device) 21 Operator's seat 34 Pivot shaft 35 Operation panel 36 Gripping grip (rotating grip) 37 Inner protruding part (switch panel) 38 Operation part (main transmission lever) 39 Operation part (accelerator volume) 41 Low-speed switch mounting surface 42 Operation part (low-speed switch)

Claims

1. In a work vehicle equipped with a working device (6, 15) and provided with an operation panel (35) having operation parts (38, 39, 42) near an operation seat (21), the operation panel (35) can be switched between a working state in which work is performed and a non-working state in which maintenance is performed. When the operation panel (35) is in the non-working state, the control device stops the operation of the machine body and invalidates some or all of the operations of the operation parts (38, 39, 42). The operation panel (35) is configured to open to a non-working state in which the rear part is pivotally supported by a pivot shaft (34) and the front part pivots upward and stands up. The determination of the working state and the non-working state is performed by detecting a switch provided on the pivot shaft (34) side, the rotation angle, or by detecting a switch provided on the front side of the operation panel (35) or the fact that the front side is in contact with the fixing part and grounded to the body. A gripping grip (36) used for switching operation and gripping is provided on the front side of the operation panel (35) so as to protrude upward from the operation panel (35). The gripping grip (36) is located on the front side of the machine body with respect to the main speed change lever (38) and is accommodated within the vertical height of the main speed change lever (38). A work vehicle characterized by this.

2. An inner protruding part (37) is provided on the right side of the operation panel (35) protruding toward the operation seat (21) and inclined so as to be lower toward the inside. An accelerator volume (39) for adjusting the output of the engine is provided on the side of the inner protruding part (37) close to the operation seat (21). The work vehicle according to Claim 1, characterized by this.

3. A switch panel (37) having a low-speed switch (42) for fixing the traveling speed to low speed is provided on the front side of the operation panel (35), on the rear side of the gripping grip (36), and on the right side of the main speed change lever (38). The low-speed switch (42) is provided on a low-speed switch mounting surface (41) which is one step lower formed on either the left or right side of the front side of the switch panel (37). The upper end part of the low-speed switch (42) is set to the same height as the upper surface of the switch panel (37). The work vehicle according to Claim 1, characterized by this.

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