JP2014200218A - Working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working vehicle that is facilitated in getting in and out of a driving part while reducing the possibility of coming into contact with an outside object during traveling of a machine body.SOLUTION: The working vehicle includes: a driving part 9; a driving part support frame 26 for supporting the driving part 9 from a lower side; and a boarding step part 81 for getting in and out of the driving part 9. The boarding step part 81 is coupled and supported to the driving part support frame 26 so as to be rotatable about a vertical axis X1 between a boarding action position and a storage position.

Description

  The present invention relates to a work vehicle such as a corn harvester or a combiner, for example, which is provided with a step unit for getting on and off for a driver.

  In the above work vehicle, conventionally, in a combine provided with a cabin that covers the upper part of the driving part, the stepping-in / out step part is supported by the support frame body on the airframe side via a rocking link type linkage mechanism, In some cases, the position can be changed over a boarding / alighting action position located on the side and a storage position retracted toward the body side. (For example, refer to Patent Document 1).

  That is, the step part for getting on and off is pivotally connected to the support frame body via a pair of upper and lower swing links that are swingable around the front axis of the machine body at both the front and rear sides of the machine body. When swinging downward, the boarding / exiting step part moves to the boarding / exiting operation position on the lower side and the outer side of the body, and when each swinging link swings upward, the boarding / exiting step part is on the upper side and the machine In this configuration, the position of the step portion for getting on and off is changed using the swinging motion of the swing link so as to move to the storage position on the inward side.

JP 2006-20544 A

  In the above conventional configuration, the position of the boarding / alighting step part is changed between the boarding / alighting action position and the storage position using the swing link. There is a limit to increasing the size, and the amount of movement in the width direction of the aircraft will be small. In the stowed position, in order to avoid the possibility of contact with an external object when the vehicle is traveling, it is necessary to reduce the amount of protrusion of the boarding / exiting step part outward from the side of the machine. Even if the operation position is switched, it is not possible to increase the amount of outward protrusion of the step portion for getting on and off.

  As a result, in the above-described conventional configuration, since the amount of lateral outward protrusion of the stepping portion for getting on and off cannot be increased at the boarding position, the position in the body width direction in plan view of a plurality of stepped portions provided in a staircase shape When the amount of deviation is small and the user gets on and off the driving part, there is a possibility that the foot of the passenger gets in contact with the end of the footrest part and it becomes difficult to get on and off.

  An object of the present invention is to provide a work vehicle that is easy to get on and off the driving unit while reducing the possibility of contact with an external object when the vehicle is traveling.

A characteristic configuration of the work vehicle according to the present invention includes a driving unit, a driving unit support frame that supports the driving unit from below, and a step unit for getting on and off the driving unit.
The boarding / alighting step part is connected and supported by the operating part support frame so as to be rotatable around the vertical axis between the boarding / alighting operation position and the storage position.

  According to the present invention, the boarding / alighting step portion is supported so as to be rotatable around the vertical axis between the boarding / alighting operation position and the retracted position. In order to increase the amount of protrusion, the dimension along the body width direction is increased, and the amount of positional deviation in the body width direction in plan view of a plurality of footrests provided in a staircase shape is set to be large. However, when switched to the storage position, the dimension along the longitudinal direction of the fuselage increases as the stepping portion for getting on and off rotates around the vertical axis, but the dimension along the lateral width of the fuselage can be reduced. .

  As a result, at the retracted position, the protruding amount of the boarding / exiting step part to the lateral side outward of the machine body can be reduced, so that the possibility of contact with an external object during running of the machine body can be reduced. And in the boarding / alighting action position, it is possible to easily get on and off the driving part by setting the amount of positional deviation in the body width direction in plan view of a plurality of footrest parts provided in a staircase shape.

  Moreover, since the step part for boarding / alighting is connected and supported by the driving part support frame having a high support strength to support the driving part, it is possible to stably support the step part for getting on and off with sufficient support strength. Is possible.

  Therefore, according to the present invention, it has become possible to provide a work vehicle that is easy to get on and off the driving part while reducing the possibility of contact with an external object when the vehicle is traveling.

In the present invention, the operating unit support frame is configured to include a vertical frame extending upward from the body frame,
It is preferable that the step portion for getting on and off is connected and supported by the vertical frame.

  According to this structure, the step part for boarding / alighting is connected and supported using the vertical frame in the driving part support frame that supports the driving part from below. The vertical frame extending upward from the machine body frame is provided as a main strength member to support the load of the operating unit, and has a high support strength. And by effectively using a vertical frame with a large support strength to support such a driving unit, the step part for getting on and off can be stabilized with a sufficient support strength without providing a special reinforcing structure. Can be supported.

In the present invention, the step part for getting on and off includes a step body for getting on and off including a plurality of footrest parts for getting on and off, and the operation unit support frame so that the step body for getting on and off can be rotated around the vertical axis. And a relay support portion coupled to the
The attached part is connected and fixed to the operating part support frame,
The relay support portion is connected to the step main body for getting on and off so as to be relatively rotatable,
It is preferable that the getting-on / off step part is connected and supported by the operation part support frame by connecting and fixing the attached part and the relay support part.

  According to this configuration, the boarding / unloading step body and the relay support part are connected in advance to be rotatable around the vertical axis to form the boarding / exiting step part. By connecting the relay support part in the step part for getting on and off, the whole step part for getting on and off is connected and supported by the operating part support frame.

  That is, the getting-on / off step body and the relay support portion are connected in advance so as to be rotatable around the vertical axis, and the getting-on / off step portion thus assembled is provided on the airframe side. It connects with a to-be-attached part.

  Instead of such an assembling configuration, for example, an assembling configuration in which the step portion for getting on and off is pivotally connected to the fixed side support member connected and fixed to the operating portion support frame so as to be rotatable around the vertical axis. Although it may be adopted, in such an assembly configuration, the step part for getting on and off must be connected at a place pivotally supported with respect to the support member provided on the airframe side, and the assembly work There are disadvantages that are difficult to do. However, according to the above-described configuration, it is possible to cope with a simple assembling operation of connecting the relay support portion to the fixed attached portion as compared with such an assembling configuration.

  In the present invention, it is preferable that the attached portion is formed of a plate-like body that is connected and fixed to the outer surface of the machine body of the operation unit support frame.

  According to this configuration, since the relay support portion is connected to the mounted portion formed of a plate-like body having a wide mounting surface located on the outer surface of the airframe of the operation unit support frame, the relay support portion Assembling becomes easy, and the assembling work can be facilitated.

  In the present invention, the relay support portion is a plate-like attachment member connected in a state of being surface-bonded to the attached portion, and extends from the attachment member toward the outer side of the machine body and the extended end portion thereof. And a support member for connecting the step main body for getting on and off to be relatively rotatable.

  According to this structure, a plate-shaped attachment member is connected with the to-be-attached part which consists of a plate-shaped body in a surface joining state. Then, the support member is integrally attached in a state extending from the attachment member toward the outer side of the machine body, and the step main body for getting on and off can be relatively rotated at the extended end portion of the support member. Since it is connected, the step part for getting on and off is connected and supported by the operation part support frame by connecting the mounting member to the mounted part.

  Since the plate-like attachment member is connected to the attachment portion made of a plate-like body in a surface-bonded state in this manner, for example, even with bolt fastening or the like, it is well connected with sufficient support strength. can do. As a result, it is possible to assemble the boarding / alighting step portion with sufficient support strength while having a simple assembly configuration.

  In the present invention, it is preferable that the support member is formed of a box-shaped body in which a bottom surface portion, an upper surface portion, and a vertical wall portion continuous in the circumferential direction are integrally connected.

  According to this configuration, the support member that extends from the mounting member toward the outer side of the machine body and that is connected to the extension main body at the extended end portion is formed as a box-shaped body. With such a box-shaped structure, even if the load on the boarding / alighting step body is cantilevered, it is difficult to be deformed, resulting in a support structure with excellent durability.

  In the present invention, the support member is connected to the step main body for getting on and off via a rotation support shaft so as to be capable of relative rotation, and narrows toward the rotation support shaft from the mounting member in plan view. It is preferable to be formed in a tapered shape.

  According to this configuration, since the support member is formed in a tapered shape that becomes narrower toward the rotation support shaft in a plan view, the step body for getting on and off relatively rotates around the axis of the rotation support shaft. Sometimes, it can be easily avoided that the step main body for getting on and off comes into contact with the support member and the rotation operation is restricted with a small rotation amount.

  In the present invention, it is preferable that the end portion on the relay support portion side of the boarding step main body is formed in a tapered shape that becomes narrower toward the rotation support shaft in a plan view.

  According to this configuration, since the end portion on the relay support portion side of the boarding / exiting step main body is formed in a tapered shape, when the boarding / exiting step main body relatively rotates around the axis of the rotation support shaft, It can be made easy to avoid that the rotation operation is restricted with a small amount of rotation when the step main body contacts the support member.

  In the present invention, it is preferable that a position holding mechanism capable of holding the boarding step main body at each of the boarding operation position and the storage position is provided.

  According to this configuration, it is possible to hold the position of the getting-on / off step body at the getting-on / off action position and the storage position by the position holding mechanism. Therefore, when the boarding / alighting step body is used to get on and off the driving part, the position holding mechanism holds the position of the boarding / alighting step main body, so that the posture of the boarding / alighting step body is stable and it is easy to get on and off. It will be a thing. Further, when the boarding / exiting step main body is in the retracted position, the posture is stabilized, so that the boarding / exiting step main body can be prevented from projecting laterally outward while the machine body is running.

In the present invention, a fuel tank is provided behind the operation unit,
A fuel filler is provided at a position higher than the upper surface of the fuel tank,
It is preferable that the position holding mechanism is configured to be able to hold the boarding / removing step main body at an intermediate position between the boarding / alighting operation position and the storage position.

  According to this configuration, the fuel tank is provided on the rear side of the operating unit, and the fuel filler port of the fuel tank is at a high position. Since there is a fuel filler port at such a high position, fuel cannot be supplied to the fuel tank from the ground outside the aircraft.

  It is conceivable to supply fuel using the boarding / exiting step part. However, when the boarding / exiting step main body is switched to the boarding / exiting operation position, the boarding / exiting step main body is separated from the fuel tank located on the rear side of the driving part. Therefore, it is not possible to perform refueling in a state where the worker is on the boarding step main body. On the other hand, in the state where the boarding step main body is switched to the retracted position, the operator cannot get on the boarding / stepping main body because the vehicle enters the inboard side.

  Therefore, according to this configuration, the boarding step main body is configured to be capable of holding the position at an intermediate position between the boarding / alighting operation position and the storage position. When the boarding step body is held at the intermediate position, the fuel tank can be refueled using the boarding step body at the intermediate position.

  In the present invention, it is preferable that the position holding mechanism is provided across the boarding / alighting step body and the relay support portion.

  According to this configuration, since the position holding mechanism is provided across the boarding step main body and the relay support part, the position holding mechanism is supported in a fixed position with respect to either the boarding step main body or the relay support part, and against the other By adopting a configuration that engages with each other, it is possible to switch between the position holding state and the holding release state with a simple configuration.

In the present invention, an external boarding platform for entering and exiting is provided on the lateral outer side of the driving part on the side of the stepping part for getting on and off,
It is preferable that an operation unit capable of switching the position holding mechanism between a position holding state and a holding release state is provided so as to protrude upward from the external boarding board.

According to this structure, when entering / exiting a driving | running | working part using a boarding / alighting step part, an operator goes in / out through an external boarding board.
In addition, the position holding mechanism can be switched between a position holding state and a holding release state by operating the operation unit, and the operation unit is provided in a state of protruding upward from the external boarding board.

  When the worker is outside the machine body, the position of the boarding / alighting step main body can be changed between the boarding / alighting operation position and the storage position by operating the operation unit by manual operation. In addition, when the operator is on the external boarding board, the position of the boarding / unloading step body can be changed between the boarding / alighting operation position and the storage position by operating the operation unit by a stepping operation.

  Therefore, it is possible to change the position of the boarding step body by switching the position holding mechanism regardless of whether the worker is outside the machine body or is already on the machine body.

In the present invention, an opening is formed in a state in which the external boarding board can be inserted vertically.
It is preferable that the operation portion is provided in a state of protruding upward through the opening.

  According to this configuration, the operation unit is provided so as to protrude upward through the opening formed in the external boarding board. And the operator who is riding on an external boarding board can operate easily by making the location which protrudes upwards rather than the opening in an operation part into the structure which carries out stepping operation with a foot | foot, for example.

  In the present invention, it is preferable that the operation unit is mounted and supported on the operation unit support frame via a vibration isolation mechanism.

  According to this configuration, even if vibration generated by an engine or the like mounted on the fuselage is transmitted to the driving unit support frame, the driving unit is mounted and supported on the driving unit support frame via the vibration isolation mechanism. Therefore, it is possible to suppress the machine body vibration transmitted from the driving unit support frame to the driving unit to be small.

  In the present invention, it is preferable that a cabin covering the upper part of the operation unit is provided.

  According to this configuration, since the upper part of the driving unit is covered with the cabin, it is possible to comfortably perform the driving operation inside the cabin in a state where it is not easily affected by the external environment such as the outside air temperature, humidity, and noise. . And when entering / exiting the cabin from the outside of the aircraft, it is possible to enter / exit using the step unit for getting on and off.

It is a left view of a corn harvester. It is a top view of a corn harvester. It is a right view of a corn harvester. It is a top view of a driving | operation part support frame. It is a side view of a driving part support frame. It is a front view of a driving part support frame. It is a side view of a driving part. It is a vertical side view of a driving part. It is a perspective view which shows the position holding tool of a door. It is a cross-sectional plan view of an operation part. It is a front view of a driving part. It is a top view on an operation panel. It is a perspective view of a transmission lever. It is a top view of a transmission lever. It is a partially notched top view of the step part for boarding / alighting. It is a vertical side view of the step part for boarding / alighting. It is a notch top view which shows the attachment structure of a 4th handrail.

  Hereinafter, a corn harvester according to an embodiment of the present invention will be described with reference to the drawings.

〔overall structure〕
As shown in FIGS. 1 to 3, a corn harvester according to the present invention includes a traveling vehicle body 3 including a pair of left and right fixed front wheels 1 and a pair of left and right rear wheels 2 that can be steered. A harvesting processing device 4 as a working unit that is located at the front of the vehicle body 3 and takes in crops, a feeder 5 that extends rearward from the rear of the harvesting processing device 4 over the traveling vehicle body 3 in the front-rear direction, and a traveling vehicle body 3 is provided with a collection tank 6 as a collection unit located at the rear of the vehicle 3 and a residue processing device 7 located at the front and rear intermediate portion between the front wheel 1 and the rear wheel 2 below the traveling vehicle body 3. ing.

  Corn forms tufts containing many seeds (fruits) at the harvesting time against the stems to be planted. The tufted portion includes a large number of seeds inside the foliage, and the seeds are formed in a form aligned with the outer surface of the rod-shaped core. The corn harvester according to the present invention harvests and collects a tufted portion having a large number of seeds inside a foliage as a harvested product.

  The traveling vehicle body 3 is provided with a driving part 9 in a state where the upper part is covered with a cabin 8 at the front part of the vehicle body, and a driving part 10 is provided behind the driving part 9. The prime mover 10 includes an engine 11, an engine cooling radiator 12, an intake case 13, an air cleaner 14 and a precleaner 15 that intake combustion air.

  The traveling vehicle body 3 is transmitted to the pair of left and right front wheels 1 after the motive power of the engine 11 provided in the driving section 10 is shifted by a continuously variable transmission (not shown) that can be freely stepped. Drive 1 to drive. The rear wheel 2 is provided so as to be steerable by a hydraulically steerable cylinder (not shown).

  In this corn harvester, during the harvesting operation, the traveling vehicle body 3 is driven by driving the front wheels 1, and the harvested product harvested by the harvesting processing device 4 is conveyed toward the collection tank 6 by the feeder 5 and stored in the collection tank 6. The Then, the stems left in the field at the time of harvest are shredded by the residue processing device 7.

  The harvesting processing device 4 is formed with three rows of introduction paths arranged in parallel in the horizontal direction, and includes a pair of left and right harvesting rolls 16 at positions sandwiching each introduction path, and a pair of left and right endless conveyance chains 17 positioned above the harvesting apparatus 16. ing. Although not described in detail, the harvesting roll 16 is rotatably supported around a rotation axis that is parallel to the introduction path, and pulls the harvested material (tufted portion) from the corn planting stems to be introduced. Cut and separate.

  In addition, an auger 18 is provided at a rear position of the plurality of harvesting rolls 16 and the plurality of endless transport chains 17 to transfer the harvested product to a lateral central position. The auger 18 transports the crops separated from the planted stem culm to the lateral center position through the three rows of introduction paths. The auger 18 supplies the harvested product from the delivery port to the conveyance start end of the feeder 5.

  The feeder 5 is provided in a state of being located at the center in the lateral direction of the machine body, and an endless rotation type conveyer conveyor (not shown) is provided in a rectangular tube-shaped feeder case 19 that is inclined upward toward the rear side. The harvested product supplied from the outlet of the auger 18 is transported along the feeder case 19, and the rear end of the feeder case 19 is moved from the rear end of the feeder case 19 to the upper side of the recovery tank 6 via the guide chute 20. Drain in the direction.

  Although not described in detail, in the processing case 23 connected to the rear end portion of the feeder case 19, leaf waste and stalk waste etc. discharged together with the crop by the feeder 5 are collected in the rear portion of the feeder 5. A processing device that scrapes off the non-harvested product that has been scraped off in a direction different from the discharge direction of the chopped material is provided inside. The shredded material is scattered from the discharge port 24 and is discharged to the rear and upward.

The collection tank 6 is formed in a substantially rectangular shape in plan view and has a shape with an open top, and accepts the harvest from the open area. In addition, a dust exhaust fan 21 is provided at a position below the discharge portion of the feeder 5 so as to be positioned below the conveyance end portion of the feeder case 19. The dust exhaust fan 21 is configured to guide the blowing of leaf waste, stem stalk waste, and the like discharged together with the crop by the feeder 5 toward the rear upper direction different from the discharge direction of the crop.
The residue processing device 7 is a hammer knife type shredding device driven and rotated around the horizontal axis, and is configured to shred the stems left in the field at the time of harvest.

  The harvesting processing device 4 is supported by the machine body so as to be swingable around the horizontal axis P1, and a lifting cylinder C1 (hereinafter referred to as harvesting processing) for a pair of left and right hydraulically operated harvesting processing devices serving as a harvesting unit driving lifting means. (Abbreviated as “cylinder”). The residue processing device 7 is supported by the machine body so as to be swingable around the horizontal axis P2, and a lifting cylinder C2 for a hydraulically operated residue processing device as a residue processing drive lifting means (hereinafter referred to as residue). The abbreviation is provided by a processing cylinder).

[Configuration of operation section]
Next, the driving unit 9 will be described.
The operation unit 9 is covered with a cabin 8 and the entire operation unit 9 including the cabin 8 is fixedly extended upward from a pair of left and right body frames 25 extending in the longitudinal direction of the body. 26 is supported from below.

  As shown in FIG. 4 to FIG. 6, the driving unit support frame 26 has two rectangular tube-shaped front support columns 27 </ b> A on the left and right sides separately from the pair of left and right body frames 25 at the vehicle body front side portion. , 27B and a pair of left and right square cylindrical rear columns 28 are integrally extended upward. In each of the left and right sides, a rectangular cylindrical front-back support 29 that connects the upper ends of the outer front strut 27A and the rear strut 28 located laterally outward of the pair of front struts 27A and 27B is provided. Is provided.

  As shown in FIG. 6, the front support columns 27 </ b> A and 27 </ b> B provided on the left and right sides, respectively, are provided in a side-by-side state, and their upper and lower sides are connected to each other. Further, the front struts 27 </ b> B on the left and right sides located on the inner side in the lateral direction of the machine body are integrally connected by the lateral support 30.

  The front and rear support bodies 29 on both the left and right sides are provided so as to protrude forward of the vehicle body from the outer front support column 27A, and the front end of the left and right outer front support columns 27A and the front and rear support units 29 on both left and right sides. The upper and lower intermediate portions of the pair of left and right rear support columns 28 are connected to each other by a lateral support 32. The operation unit 9 is supported from below by the operation unit support frame 26 having such a configuration.

  As shown in FIG. 8, the cabin 8 that covers the operating unit 9 is supported by the support frame 33, and a front surface 34, left and right side surfaces 35 and 36, a rear surface 37, and a ceiling 38 are formed. The support frame 33 includes a ceiling support portion 39 that supports the ceiling 38, a bottom surface support portion 41 that supports the floor portion 40 of the operation unit 9, and a plurality of vertically oriented members that connect the ceiling support portion 39 and the bottom surface support portion 41. The columns 42 are integrally connected. As the plurality of columns 42, a corner column column 42A provided at a position corresponding to the corners of the four corners in plan view, and an intermediate column column 42B that receives and supports the rocking end side positions of the left and right doors 43R and 43L are provided. It has been.

  The cabin 8 is formed in a box shape so as to surround the operation unit 9, and the entire operation unit 9 including the cabin 8 is elastically provided on the upper part of the operation unit support frame 26 via an anti-vibration rubber 44 as an anti-vibration mechanism. Is supported. That is, as shown in FIGS. 4 to 6, the mounting brackets 45 are provided at a total of four places, two at a distance in the front-rear direction on each of the left and right front-back supports 29 on the left and right sides of the operating part support frame 26. It has been. As shown in FIG. 8, a support bracket 46 provided on the bottom surface support portion 41 of the support frame 33 is placed and supported on the mounting bracket 45 via a vibration isolating rubber 44, so that the entire cabin 8 is vibration proof. It is configured to be supported by the operation unit support frame 26 via the rubber 44.

  The front surface 34 of the cabin 8 and the doors 43R, 43L of the left and right side surfaces 35, 36 of the cabin 8 are each made of transparent glass, so that it is easy to visually confirm the front part of the machine body and the left and right sides from the operation unit 9. Yes. As shown in FIG. 7, the left and right doors 43 </ b> R and 43 </ b> L each have a front-side end portion that can swing open and close around a vertical axis through a pair of upper and lower pivot connecting portions 47. It is supported by the front corner 42A. The left and right doors 43R and 43L are configured such that the driver gets on and off the left door 43L, and the driver does not get on and off the right door 43R. Further, as shown in FIG. 3, the entire rear side portion of the right side surface 35 of the cabin 8 with respect to the right door 43 </ b> R is closed by a plate-like wall portion 48.

  As shown in FIG. 7, the rear side portion of the left side surface 36 of the cabin 8 with respect to the left door 43L is formed on a glass surface 49 provided with transparent glass in the upper half, and the lower half is a plate body. A plate-like wall portion 50 to be closed is formed. And in the partition part 51 between the upper glass surface 49 and the lower plate-like wall part 50, there is a connecting body 52 erected and connected over the corner post 42A on the left rear side and the intermediate post 42B on the left side. In the state where it protrudes to the inner surface side of the cabin 8. The coupling body 52 can be used as an elbow rest when an operator (assistant) is placed in the left space of the driver seat 53 in the cabin 8. At this time, since the partition portion 51 is in an inclined posture that is positioned downward toward the front side of the machine body, the operator can easily place an elbow on the connection body 52.

  The right door 43R is not intended for an operator to enter and exit, but is narrower than the left door 43L so that it can pass through the right door 43R from the inside of the cabin 8 and exit to the outside. It can be opened and closed within a range (for example, about several tens of centimeters).

Further, in order to hold the right door 43R in a slightly opened state when the interior becomes hot in summer or the like, a position holder 54 that can hold the position with the right door 43R opened slightly. Is provided.
As shown in FIG. 9, the position holder 54 is formed by bending a metal wire, and a swinging operation is performed by a support bracket 55 on an intermediate column 42 </ b> B positioned at the swing side end of the right door 43 </ b> R. Supported as possible. A locking action portion 56 bent in an L shape is formed at the free end side end of the position holder 54, and this locking action portion 56 is attached to an engagement member 57 provided on the inner surface of the right door 43R. By engaging with the formed engagement hole 58, the position holding tool 54 is in a stretched state, and the right door 43R can be held in a slightly opened state. When not in use, the position holder 54 can be held in a retracted posture that hangs downward by being elastically held by the clamp member 59 provided in the intermediate column 42B.

  Although the rear surface 37 of the cabin 8 is configured by a plate-like wall portion 60 that is mostly closed by a plate body, as shown in FIG. 8, a partial region on the upper side is made of a glass plate. A glass surface 61 is provided, and the glass surface 61 is provided in a slightly inclined state so as to be positioned on the front side toward the upper side in a side view so that the lighting with respect to the operation unit 9 can be favorably performed. .

[Operation structure of the driving unit]
The operation structure of the driving unit 9 will be described.
As shown in FIGS. 10 and 11, a handle post 62 is erected on the front side of the driver's seat 53 in the driver 9, and a steering operation for the rear wheel 2 is commanded above the handle post 62. A steering handle 63 is provided. As shown in FIG. 12, a shift lever 65 for shifting the continuously variable transmission is provided on the operation panel 64 provided on the right side of the driver seat 53 so as to be swingable in the front-rear direction. Further, an accelerator lever 66 capable of manually setting an accelerator is provided on the right side of the speed change lever 65, that is, on the side opposite to the driver seat 53 of the speed change lever 65.

  In the lever guide 67 through which the speed change lever 65 is inserted in the operation panel 64, a road traveling area L1, a work area L2, and a reverse area L3 are formed in order from the front side to the rear side. When the harvester is driven on a road other than the farm field, the shift lever 65 is operated to operate the road harvesting region L1. When the harvesting operation is performed while the harvester is traveling forward in the field, the operation is performed in the work area L2. When moving backward, the vehicle is positioned in the reverse area L3. In the road traveling area L1 and the work area L2, the traveling speed of the aircraft increases as the shift lever 65 is tilted forward. In the reverse region L3, the speed at which the machine moves backward increases as the shift lever 65 is tilted backward.

  As shown in FIGS. 10 and 11, an accelerator pedal 68 that performs an accelerator operation by a stepping operation and a traveling transmission system are provided on the front side of the body of the speed change lever 65 and on the right side of the handle post 62. And a brake pedal 69 for operating a brake (not shown).

  The accelerator lever 66 is configured to be swingable in the front-rear direction and to be held at an arbitrary operation position by a friction holding mechanism (not shown). During the harvesting operation, the operator manually operates the accelerator lever 66 to set a predetermined value and holds the position, and the traveling speed is changed by moving the speed change lever 65 in the front and rear direction in the work area L2. Can be adjusted. When running on the road, the speed change lever 65 can be operated and held in the road running area L1, and the accelerator pedal 68 can be depressed to change and adjust the running speed.

  When the brake pedal 69 is depressed during traveling, the brake is activated, and the brake pedal 69 and the shift lever 65 are linked via a link mechanism (not shown) so that the shift lever 65 is forcibly operated to the neutral position. Has been. Accordingly, when the brake pedal 69 is stepped on the road, the speed change lever 65 is operated to the neutral position, the continuously variable transmission is switched to the neutral state, and the stopped state is maintained even if the foot is released from the brake pedal 69. .

  Commanding the input of the operation of the harvesting processing device C1 as the harvesting unit ascending / descending commanding means for commanding the input of the operation of the harvesting processing cylinder C1, and the operation of the residue processing cylinder C2 A lift switch 71 (hereinafter simply referred to as a residue lift switch) for a residue processing device as a residue processing lift command means is used as a finger for gripping and operating the shift lever 65 on the grip portion 72 of the shift lever 65. It is provided so that it can be operated.

  In other words, as shown in FIGS. 13 and 14, the speed change lever 65 is configured to include a grip portion 72 that is operated while the operator grips with a hand, and a rod portion 73 that supports the grip portion 72. ing. In addition, the grip portion 72 is formed in a round shape that is rounded as a whole, and includes a first surface 74 on which the thumb is positioned when the hand is gripped and four fingers other than the thumb, that is, the index finger f and the middle finger m. A second surface 75 on which the ring finger r and little finger p are located, an upper surface 76 that is a surface different from the first surface 74 and the second surface 75, and a back surface 77 located on the opposite side of the second surface 75. Is formed.

  The first surface 74 is located on the left side close to the driver's seat 53, and in a plan view, the first surface 74 is located forward as it moves away from the driver's seat 53 in the right direction, that is, as it moves away from the driver. It is inclined to.

  A harvesting lift switch 70 is provided on the first surface 74. Further, on the first surface 74, a bulging portion 79 is formed in an area excluding a place where the operator's thumb is located, around a switch installation place 78 as a command means installation place where the harvesting lifting switch 70 is installed. Has been. That is, in the periphery of the switch installation location 78, the bulging portion 79 is formed so as to bulge out from the switch installation location 78 in the left direction at each of the upper location, the front location, and the lower location. Is formed. There is no bulging part at the rear side where the thumb is located, so that the harvesting lift switch 70 can be operated with the thumb without difficulty.

  By forming the bulging portion 79 as described above, for example, when a driver sitting on the driver's seat 53 performs an operation of rapidly decelerating during traveling, when operating the shift lever 65 Incorrectly, the bulging portion 79 prevents the fingers, arms, and the like from contacting the harvesting raising / lowering switch 70, thereby preventing the harvesting processing device 4 from being raised or lowered by mistake when it should not be raised or lowered.

  The harvest raising / lowering switch 70 is configured by a rocker switch. In other words, one knob 70A as an ascending command operation part and the other knob 70B as a descending command operation part formed continuously to this one knob 70A are provided, to one knob 70A or the other knob 70B. When the pressure is released, it is composed of a momentary switch that automatically returns to the neutral position. Further, when one knob 70A is pressed, an ascending command for the harvesting processing device 4 is input, and when the other knob 70B is pressed, a descending command is input, so that either the knob 70A or the other knob 70B is pressed. When is released, the lifting and lowering of the harvesting processing device 4 is stopped.

  When at least the speed change lever 65 is positioned in the work area L2, one knob 70A and the other knob 70B are aligned in the vertical direction with one knob 70A positioned above the other knob 70B. Is arranged in.

  Thus, the raising of the harvesting processing device 4 is realized by manually operating the knob 70A located above, and the lowering of the harvesting processing device 4 is realized by manually operating the knob 70B located below. Therefore, the lifting operation of the harvesting processing apparatus 4 and the operation of the harvesting lifting switch 70 are in a corresponding positional relationship, and the corresponding relationship is intuitively easy to understand for the operator, so there is no mistake in operation. It will be possible to operate.

  The second surface 75 is a surface on which the index finger f, middle finger m, ring finger r, and little finger p are arranged. In plan view, the second surface 75 is inclined so as to be positioned rearward as it moves away to the right. That is, the second surface 75 is inclined so as to be positioned rearward as it is farther from the operator in plan view. Further, at the upper end portion of the second surface 75, a finger-hanging protruding portion 75a for hooking four fingers other than the thumb, that is, the index finger f, the middle finger m, the ring finger r, and the little finger p is bulged and formed. The residue raising / lowering switch 71 is provided in the state located below the finger-hanging protrusion 75a on the second surface.

  The residue raising / lowering switch 71 is configured by a rocker switch in the same manner as the harvesting raising / lowering switch 70. That is, one knob 71A as an ascending command operation unit and the other knob 71B as a descending command operation unit formed continuously with the one knob 71A are provided. Further, when one knob 71A is pressed, an ascending command for the residue processing device 7 is input, and when the other knob 71B is pressed, a descending command for the residue processing device 7 is input. Or if the press of the other knob 71B is cancelled | released, raising / lowering of the residue processing apparatus 7 will be stopped.

  One knob 71A and the other knob 71A are located on the side close to the operator's body seated on the driver's seat 53 and the other knob 71B is located on the side far from the operator's body. 71B are arranged side by side in the perspective direction with respect to the operator.

  As described above, the rise of the residue processing device 7 (the operation of approaching the operator's body) is realized by the operation of the knob 71A located on the side close to the operator's body, and the residue processing device 7 is lowered (maneuvered). The operation of moving away from the operator's body) is realized by the knob 71B located on the side far from the operator's body, so that the lifting operation of the residue processing device 7 and the operation of the residue lifting switch 71 correspond to each other. Since it is in a positional relationship and the corresponding relationship is intuitively easy for the operator to understand, the operation can be performed satisfactorily without any operation mistakes.

[Support structure for workers around the driving section]
Next, the worker support structure around the driving unit 9 will be described.
As shown in FIGS. 10 and 11, an external platform 80 connected to the floor portion 40 of the driving unit 9 is provided on the lateral outer side of the driving unit 9, that is, on the lateral outer side of the left door 43 </ b> L of the cabin 8. It has been. The external boarding base 80 is connected and fixed to the support frame 33 of the cabin 8. Further, a step part 81 for getting on and off is provided on the outside of the external boarding base 80 so as to be able to get on and off the driving part 9.

  As shown in FIG. 2, a work deck 82 is provided on the lateral side on the rear side of the driving unit 9 and on the left side of the feeder 5 in the lateral direction of the vehicle body. An operator (a pilot or an assistant other than the pilot) gets on the work deck 82, and is stored in the collection tank 6 and stored in the collection tank 6. It is possible to perform various operations such as monitoring the discharge state of scraps and stalks and scraps, and removing stalks and scraps when they are clogged. The work deck 82 is arranged so that the front end is located near the rear end of the external boarding base 80, and is provided in a state of being connected to the external boarding base 80 so that the operator can pass from the external boarding base 80. Yes.

  As shown in FIG. 1, the work deck 82 is supported by a plurality of vertical frames 83 provided in a state of being supported by the machine body frame 25, and fuel for storing fuel supplied to the engine 11. It is located above the tank 84 and functions as a cover that covers the upper side of the fuel tank 84.

  As shown in FIG. 1, an oil supply pipe 85 for supplying fuel to the fuel tank 84 extends upward from the upper surface 84 a of the fuel tank 84 and is provided so as to protrude upward through an opening 86 formed in the work deck 82. ing. An oil supply port 87 is formed at a position protruding above the work deck 82 and higher than the upper surface 84a.

A fence 88 for supporting the worker is attached and fixed to the lateral outer edge and the rear side edge of the work deck 82 so that the worker can work safely. The fence 88 is provided in a state of being continuously connected from the lateral outer edge to the rear side edge of the work deck 82, and an upper support rod 88A positioned at a height at which the operator can grip and operate, and the upper support rod. A plurality of vertical rods 88B provided at appropriate intervals to support 88A, and an intermediate portion between the upper support rod 88A and the work deck 82, and a rear side edge from a lateral outer edge of the work deck 82 The intermediate support rods 88C provided in a continuous state over the edges are connected and fixed, and the lower ends of the plurality of vertical rods 88B are connected and fixed to the work deck 82, respectively.
The fence can use the upper support bar 88A as a handrail, and can receive and support the operator's body by the intermediate support bar 88C.

  Further, as shown in FIG. 2, a central work deck 89 is provided in a state of being located on the rear side of the cabin 8 and above the feeder 5. The central work deck 89 is provided in a state of being connected and fixed to the upper surface of the feeder 5, and has a support strength that allows an operator to place and move. An operator can get on the central work deck 89 from the work deck 82 and can transfer to the lateral side of the feeder 5 on the right side in the vehicle body width direction, and can perform various maintenance operations on the prime mover 10. It becomes.

Next, the boarding / alighting step unit 81 will be described.
As shown in FIGS. 2 and 15, the boarding / alighting step portion 81 swings around the vertical axis X <b> 1, thereby projecting outward in the lateral direction and located on the lateral outer side of the front wheel 1. And a retractable position E2 which is retracted inwardly of the vehicle body and located on the rear side of the front wheel 1.

  As shown in FIG. 7, the boarding / alighting step unit 81 is capable of rotating the boarding / alighting step body 91 having a plurality of boarding / alighting foot rests 90 and the boarding / alighting step body 91 about the vertical axis X1. And a relay support portion 92 connected to an outer front support column 27A (an example of a vertical frame) on the left side of the operation portion support frame 26.

  As shown in FIG. 15, the attached portion 93 is connected and fixed to the left outer front support column 27 </ b> A in the operation portion support frame 26. The relay support portion 92 is connected to the getting-on / off step body 91 so as to be relatively rotatable, and is connected and fixed to the attached portion 93, so that the getting-on / off step portion 81 is connected to the operating portion support frame 26. It is configured to be connected and supported.

  The attached portion 93 is formed of a rectangular plate-like body, and is integrally connected and fixed to the side surface of the outer front support column 27A located on the left side. That is, the outer front support column 27A is formed in a rectangular tube shape, and is configured to be integrally connected and fixed in a state in which the mounting portion 93 of the plate-like body is applied to the flat side surface on the lateral outer side of the machine body. It has become.

  The relay support portion 92 is a plate-like attachment member 94 that is connected in a state of being surface-bonded to the attachment portion 93, and extends from the attachment member 94 toward the outer side of the machine body and is used for getting on and off the extended end portion. The step body 91 is provided with a support member 95 that pivotally supports the step body 91 so as to be relatively rotatable.

  The mounting member 94 is formed of a rectangular plate that is substantially the same as the mounted portion 93, and the mounting member 94 is mounted by fastening the four corners with bolts in a state where the mounting member 94 is face-bonded to the mounted portion 93. It is configured to be connected and fixed to the portion 93.

  As shown in FIGS. 15 and 16, the support member 95 is formed of a box-like body in which a bottom surface portion 95 a, an upper surface portion 95 b, and a vertical wall portion 95 c continuous in the circumferential direction are integrally connected. And it is formed in the taper shape which becomes so narrow that it extends toward the outer side of the body from the attachment member 94 by planar view. In other words, the bottom surface portion 95a and the top surface portion 95b are each formed of a substantially triangular plate-like body in a plan view, and the vertical wall portion 95c is provided with vertical plate-like portions on both the front and rear sides from the mounting member 94. It is formed in a substantially V shape in plan view so as to approach each other as it extends toward the outside of the machine body, and a bottom surface portion 95a, a top surface portion 95b, and a vertical wall portion 95c are integrally connected and fixed to form a substantially box shape. Has been. A cylindrical pivot boss portion 97 for supporting the rotation support shaft 96 is integrally connected and fixed to the tip portion of the support member 95 formed in a substantially box shape in a plan view as described above. Yes.

As shown in FIG. 7, the getting-on / off step body 91 includes a vertically extending portion 98 extending in the vertical direction and a horizontally extending portion 99 extending in the horizontal direction in a state of being integrally connected. ing.
The vertically extending portion 98 includes side plates 100 that are located on both left and right sides and extend in the vertical direction in parallel, and three footrest portions 90 that are connected to the left and right side plates 100 with appropriate vertical spacing. And is formed in a staircase shape.

  As shown in FIGS. 15 and 16, the laterally extending portion 99 includes side plates 103 on both the left and right sides that extend in the lateral direction in a state of being connected to the side plate 100 in the longitudinally extending portion 98, and locations on the longitudinally extending portion 98 side. , A footrest 90 that is constructed and connected over the left and right side plates 103, a pair of upper and lower pivot support bosses 105 for supporting the pivot shaft 96, and the left and right side plates 103 on the side close to the support member 95. A pair of upper and lower connecting plates 106 that are erected and connected to each other, and a pair of upper and lower reinforcing plates 107 for supporting the pivot boss portion 105 are provided. The footrest portion 90 is formed with a plurality of anti-slip protrusions 102 that are open at the center.

  When the description is added, the left and right side plates 103 of the laterally extending portion 99 are formed in a substantially V shape in plan view so as to approach each other toward the support member 95 at a location closer to the support member 95. Then, the upper and lower pivot boss portions 105 positioned in a state where the pivot boss portions 97 of the support member 95 are sandwiched from both the upper and lower sides are integrally connected and fixed to the end portion on the support member 95 side where the left and right side plates 103 are closest. Has been.

  A footrest portion 90 is provided in a state in which the lower portions of the left and right side plates 103 are connected to each other at a location near the longitudinally extending portion 98 in the laterally extending portion 99. The footrest portion 90 is formed with a plurality of anti-slip protrusions 102 similar to the footrest portion 90 in the vertically extending portion 98. Further, a vertical wall portion 108 is integrally connected to an end portion of the footrest portion 90 on the support member 95 side, and the vertical wall portion 108 is connected and fixed to the upper and lower connecting plates 106.

  The upper and lower connecting plates 106 are made of flat plates, the lower connecting plate 106 connects the lower portions of the left and right side plates 103, and the upper connecting plate 106 connects the upper portions of the left and right side plates 103. Yes. The pair of upper and lower connecting plates 106 are formed in a substantially V shape in plan view so that a portion closer to the support member 95 becomes tapered toward the support member 95 along the left and right side plates 103. Yes.

  Further, as shown in FIG. 15, the pair of upper and lower reinforcing plates 107 are formed in a substantially triangular shape in plan view and are connected and fixed to the left and right side plates 103 and the upper and lower pivot boss portions 105. With such a configuration, the support strength at a place where the entire weight of the stepping-in / out step 81 is applied to the rotation support shaft 96 is improved. Accordingly, the end portion on the relay support portion 92 side of the boarding / alighting step body 91 is formed in a tapered shape that becomes narrower toward the rotation support shaft 96 in plan view.

  As shown in FIG. 16, a pair of upper and lower pivot bosses 105 on the side of the getting-on / off step body 91 are vertically positioned with the pivot boss 97 on the support member 95 side being sandwiched, and each of the pivot bosses is positioned. A rotation support shaft 96 is fitted inside the portions 97 and 105 so as to penetrate vertically. Then, the rotation support shaft 96 is supported by the position where the rotation support shaft 96 protrudes downward from the lower support boss portion 105 with a retaining pin 109.

  Therefore, the boarding / alighting step body 91 is supported so as to be rotatable around the vertical axis X1 of the rotary support shaft 96, and the boarding / exiting action protrudes outward from the vehicle body side by rotation around the vertical axis X1. It is configured to be switchable between a position E1 and a storage position E2 that retreats toward the inside of the machine body.

A position holding mechanism 110 is provided that can hold the boarding step body 91 at the boarding operation position E1 and the storage position E2.
This position holding mechanism 110 is disengaged from the engagement hole 111 formed in the step body 91 for getting on and off, and the state in which the position is fixed to the relay support portion 92 and engaged with the engagement hole 111. A lock pin 112 that can be switched to a state, a support stay 113 that movably supports the lock pin 112, and the like, and a holding state that holds the position of the boarding step body 91 and a release state that releases the position holding state. It is configured to be switchable. An operation unit 114 is provided that can switch the position holding mechanism 110 between a holding state and a releasing state.

  As shown in FIGS. 15 and 16, the support stay 113 is formed of a channel material in which one side ends of the upper plate portion 113a and the lower plate portion 113b are integrally connected by a vertical plate portion 113c. The vertical plate portion 113c is fastened and fixed to the support member 95 by fastening the vertical plate portion 113c to the vertical bracket 115 which is fixedly erected upward from the upper surface portion 95b at a location close to the tapered tip.

  A rotation support shaft 96 is integrally connected and fixed to the support stay 113. That is, the rotation support shaft 96 is provided in a state of passing through the upper plate portion 113a and the lower plate portion 113b of the support stay 113, and the rotation support shaft 96 is provided in each of the upper plate portion 113a and the lower plate portion 113b. It is integrally connected and fixed. That is, the support stay 113 is configured to also serve as a member that supports the rotation support shaft 96.

  The support stay 113 is located on the side close to the support member 95 in the laterally extending portion 99 of the boarding step main body 91 from a position close to the tapered tip end portion of the support member 95 toward the left outer rear side in the plan view. It is provided in a long shape in a state extending over the place.

  A lock pin 112 is provided at a portion of the support stay 113 corresponding to the getting-on / off step main body 91 so as to be detachably engaged with the engaging hole 111 formed in the getting-on / off step main body 91. The lock pin 112 is inserted in the upper plate portion 113a and the lower plate portion 113b, is supported so as to be movable up and down, and is provided in a state of being urged downward by a spring 116.

  The operation portion 114 for moving the lock pin 112 up and down is formed by bending a narrow band-like body, one end of which is integrally connected to the lock pin 112, and the other end side in the longitudinal direction of the support stay 113. It extends long along the direction.

  The operation unit 114 is supported by the support stay 113 so as to be swingable around a horizontal axis P3 along a direction orthogonal to the longitudinal direction of the support stay 113. That is, as shown in FIG. 16, a pair of vertically supporting plate-like support portions 118 are integrally formed on the extension plate portion 117 that is integrally extended from the upper plate portion 113 a of the support stay 113. In addition, a pivotal support portion 119 extending from a middle portion in the longitudinal direction of the operation portion 114 is inserted between a pair of plate-like support portions 118, and the operation portion 114 is swung by a support shaft 120 inserted through them. It is supported freely. The distance between the pair of plate-like support portions 118 is substantially the same as the plate thickness of the pivot support portion 119, and is configured so that the operation portion 114 can be swingably supported in a stable state without rattling.

  An end portion of the operation portion 114 extending in the extending direction is bent upward, and the end portion of the operation portion 114 in the extending direction is formed so as to be vertically inserted into the external boarding base 80. It protrudes upward through 121 (an example of an opening).

  The portion where the lock pin 112 is inserted in the upper plate portion 113a has a shape cut out along the extending direction of the operation portion 114, and the opening 123 through which the lock pin 112 is inserted in the lower plate portion 113b is A long hole is formed in the extending direction of the operation unit 114. With this configuration, the lock pin 112 can be swung in an integrally interlocking manner with the swing of the operation unit 114.

An engagement hole 111 into which the lock pin 112 enters and engages is formed in the getting-on / off step body 91 located below the lock pin 112.
This engagement hole 111 is provided at the boarding / egressing position E1 where the boarding / exiting step main body 91 projects outward in the lateral direction of the machine body, and the boarding / lowering step body 91 is retracted inward in the lateral direction of the machine body and below the work deck 82. The storage position E2 located on the side, and when the getting-on / off step body 91 is at an intermediate position E3 suitable for refueling work with respect to the fuel tank 84, is located between the boarding / egressing action position E1 and the storage position E2. A total of three pins 112 are formed corresponding to the positions where the pins 112 enter.
Each engagement hole 111 is formed in a long hole so that the lock pin 112 can be swung in a state of being integrally interlocked with the swing of the operation unit 114. That is, the getting-on / off step body 91 is configured to be switchable and to be able to hold a position at an intermediate position E3 located between the getting-on / off action position E1 and the storage position E2.

  Since the lock pin 112 is urged to move downward by the spring 116, when the stepping body 91 is changed in posture and any of the engagement holes 111 is in a position corresponding to the lock pin 112, the lock pin 112 is in a free state. Then, it engages and engages with the engagement hole 111. When the lock pin 112 is engaged with the engagement hole 111 as described above, the lock pin 112 is in a substantially vertical posture and is held in contact with the end edge of the support stay 113 in this posture.

Further, a lower limit restricting tool 124 having a shape obtained by bending the band plate into a U shape when viewed from the side is provided on the lower surface side of the place where the engagement hole 111 of the getting-on / off step body 91 is formed. The lower limit restricting tool 124 is formed with an engagement hole 123 having a long hole shape similar to the engagement hole 111 of the getting-on / off step body 91 on the upper surface connected and fixed to the lower surface of the getting-on / off step body 91. However, no engagement hole is formed in the lower surface located on the lower side, and the lower surface is configured to function as a stopper that restricts the downward movement of the lock pin 112.
That is, the lock pin 112 can be inserted and engaged with the engagement hole 111 of the getting-on / off step main body 91 by a predetermined amount that can hold the position of the getting-on / off step main body 91, and the secular change due to long-term use, etc. Even if the engagement depth may change due to this, the lock pin 112 is restricted from being inserted into the engagement hole 111 more than necessary.

  When a portion protruding upward from the external boarding base 80 of the operation unit 114 is pushed downward, the lock pin 112 swings upward against the biasing force of the spring 116 and engages with the engagement hole 111. Is released. In this released state, the getting-on / off step body 91 can be rotated to an arbitrary position. When the operator is outside the machine, the operation unit 114 can be operated to the release state by hand, and when the operator is on the external boarding board 80, the operation unit 114 can be released by stepping on the foot. Can be operated. The operation unit 114 is operated to the released state to rotate the boarding step main body 91 to a desired position, and the operation of the operation unit 114 is stopped and switched to the holding state.

When the operator gets on and off the driving unit 9 from outside the machine, the step main body 91 is switched to the boarding action position E1. When the aircraft is traveling, such as performing harvesting work or traveling on the road, the boarding step main body 91 is switched to the storage position E2.
Further, since the fuel supply port 87 of the fuel tank 84 is at a high position and fuel supply to the fuel tank 84 from the ground cannot be performed, the boarding step body 91 is switched to the intermediate position E3 by switching the boarding step body 91 to the intermediate position E3. It can be placed on 91 and approach the fuel filler port 87 to refuel.

[Handrail for supporting workers]
Next, a handrail for supporting an operator provided around the driving unit 9 will be described.
As shown in FIGS. 1, 2, and 7, a first handrail 131 is provided in a state of being positioned between the cabin 8 and the work deck 82. The first handrail 131 is provided with respect to the cabin 8 and the work deck 82 in a state of being located on the boarding / exiting step portion 81 side and extending rearward.

The first handrail 131 is provided so as to extend rearward in a plan view, and is provided in a state extending in a loop shape long in the vertical direction, and both upper and lower sides of the first handrail 131 are included in the support frame 33 of the cabin 8. It is connected and fixed to a corner post 42A located on the side surface on the 81 side.
When the worker changes between the external boarding platform 80 and the work deck 82, the worker can move in a stable posture by grasping the first handrail 131.

  A second handrail 132 is provided at a position on the rear side of the cabin 8 at the center side in the body width direction and corresponding to the upper portion of the rear surface 37 of the cabin 8. That is, the second handrail 132 is provided in a state of extending rearward in a plan view and extending in a loop shape in the lateral direction, and the rear portion of the ceiling support portion 39 in the support frame 33 of the cabin 8. The left and right sides are connected and fixed to the side.

  As shown in FIG. 7, a third handrail 133 is provided on the outer surface side of the plate-like wall portion 50 on the side surface of the cabin 8 on the boarding / alighting step portion 81 side. The third handrail 133 is provided in a state of extending in a lateral direction in a plan view and in a state of extending in a long loop shape along the rearward downward inclination direction.

  The third handrail 133 is provided in a state of being positioned below the first handrail 131 in a side view. In other words, the upper end portion of the third handrail 133 is connected and fixed to the intermediate support column 42B in a state of being slightly lower than the lower end portion of the first handrail 131 in a side view, and extends long along the rearward downward tilt direction. The lower end portion is connected and fixed to the upper and lower intermediate positions of the corner post 42A.

  When an operator uses the step unit 81 for getting on and off to enter and exit the driving unit 9, for example, when opening and closing the left door 43 </ b> L, the operator operates while grasping the third handrail 133, thereby stabilizing the posture. The door 43L can be opened and closed. Further, when getting on and off, holding the third handrail 133 stabilizes the posture.

A fourth handrail 134 is provided on the inner surface of the left door 43L.
That is, as shown in FIG. 7, the fourth handrail 134 is provided in a state where the upper and lower sides are fixed on the inner surface side of the glass surface 49 of the left door 43L. The fourth handrail 134 has a lower end portion located in the vicinity of the operation knob 135 for opening and closing the door 43L, and an upper end portion located at a position corresponding to the pivot connecting portion 47 located on the upper side. It is provided in an elongated shape with an oblique posture located on the upper side.

  As shown in FIG. 18, the lower end portion of the fourth handrail 134 is connected by being fastened and fixed with a screw 136 while sandwiching the glass surface 49, and the upper end portion pivotally supports a flange portion 137 provided integrally therewith. It is connected and fixed to the connecting portion 47 by screw fastening, and is provided in a loop shape so as to extend toward the inside of the machine body in a plan view. Similarly, the right door 43R is also provided with a fourth handrail 134 on the right side in an oblique posture positioned on the inner surface side at the front side.

  The lower end position of the fourth handrail 134 is set at substantially the same position as the upper end position of the third handrail 133 in a side view of the body. With this configuration, when the operator moves in and out of the driving unit 9, when the third handrail 133 and the fourth handrail 134 are moved and moved, they are close to each other. Is easy to do. The fourth handrail 134 is used not only when entering and exiting the driving unit, but also when an operator in the driving unit 9 opens and closes the doors 43R and 43L.

The boarding / exiting step portion 81 is provided with a fifth handrail 138 located below the work deck 82 at a location located on the inner side of the machine body when switched to the storage position E2.
As shown in FIG. 7, among the pair of left and right side plates 100 of the vertically extending portion 98 in the boarding / alighting step portion 81, when the side plate 100 is switched to the storage position E2, the fifth side plate 100 is located on the inboard side. A handrail 138 is provided. The fifth handrail 138 is provided in a loop shape extending in the vertical direction in a state of being extended outward at the upper side portion of the side plate 100, and both upper and lower sides are connected and fixed to the side plate 100.

The fifth handrail 138 is provided below the upper end of the vertically extending portion 98 and is positioned below the work deck 82 when the boarding / exiting step portion 81 is switched to the storage position E2. Therefore, it can be retracted and stored in the body side without interfering with the work deck 82.
Further, the fifth handrail 138 is in a state of approaching the third handrail 133 in a plan view when the getting-on / off step portion 81 is at the getting-on / off action position E1.

A sixth handrail 139 extending upward from the work deck 82 is provided on the opposite side of the boarding step portion 81 from the side on which the fifth handrail 138 is provided.
As shown in FIG. 7, among the pair of left and right side plates 103 of the laterally extending portion 99 in the boarding step 81, the sixth handrail is attached to the side plate 103 located on the outer side of the machine body when switched to the storage position E2. 139 is provided. This sixth handrail 139 is configured to extend in the form of a loop extending in the vertical direction at the end of the side plate 103 on the longitudinally extending portion 98 side, and bolts the both end portions located at the bottom. Thus, the side plate 103 is connected and fixed.

  As shown in FIGS. 1 and 2, the sixth handrail 139 is located in a state of being close to the lateral end of the work deck 82 in a plan view when the boarding step 81 is switched to the storage position E2. And it is the structure located in the state extended upwards rather than the work deck 82 by the side view, specifically, the upper end part extended to the height close | similar to the intermediate support rod 88C of the fence 88. FIG.

  When the operator transfers between the external boarding base 80 and the work deck 82 in a state where the boarding / exiting step portion 81 is switched to the storage position E2, the operator moves the fifth handrail 138 and the sixth handrail. By grasping 139, the robot can move in a stable posture. The sixth handrail 139 can also exhibit a function of assisting the fence 88 when an operator is on the work deck 82.

  When the boarding / exiting step unit 81 is switched to the boarding / exiting operation position E1, the fifth handrail 138 and the sixth handrail 139 are used when the boarding / exiting unit 81 is used to get in and out of the driving unit 9. The posture becomes stable by having.

[Another embodiment]
(1) The position holding mechanism 110 may be configured to hold the getting-on / off step body 91 at only two positions of the getting-on / off action position E1 and the storage position E2.

(2) The support member 95 may be formed in a rectangular shape in plan view.

(3) Instead of forming the opening 121 in the external boarding base 80, the operation unit 114 in the position holding mechanism 110 may be provided so as to protrude upward through the lateral outer side of the external boarding base 80.

(4) It is good also as a structure by which the driving | operation part 9 is not provided with the cabin 8 which covers the upper direction, and upper direction is open | released.

(5) Instead of the configuration in which the attached portion 93 is provided, the step unit 81 for getting on and off may be directly attached to the operation unit support frame 26.

(6) Instead of a corn harvester, other types of work vehicles such as a combine and a tractor may be used.

  The present invention can be applied to various work vehicles such as a combine harvester and a tractor in addition to a corn harvester.

DESCRIPTION OF SYMBOLS 8 Cabin 9 Operation part 25 Airframe frame 26 Operation part support frame 27A Vertical frame 44 Anti-vibration mechanism 80 External boarding board 81 Step for getting on / off 84 Fuel tank 87 Fueling port 90 Footrest part 91 Step body for getting on / off 92 Relay support part 93 Covered Mounting portion 94 Mounting member 95 Support member 95a Bottom surface portion 95b Top surface portion 95c Vertical wall portion 96 Rotating support shaft 110 Position holding mechanism 114 Operation portion 121 Opening E1 Elevation position for getting on and off E2 Storage position X1 Axis core

Claims (15)

A driving unit, a driving unit support frame that supports the driving unit from below, and a step unit for getting on and off the driving unit;
A work vehicle in which the step part for getting on and off is connected to and supported by the operating part support frame so as to be rotatable around a vertical axis between an action position for getting on and off and a storage position. The operation unit support frame is configured to include a vertical frame extending upward from the body frame,
The work vehicle according to claim 1, wherein the boarding / alighting step portion is connected and supported by the vertical frame. The boarding / exiting step main body provided with a plurality of boarding / exiting foot rests, and a relay support for connecting the boarding / exiting step main body to the driving unit support frame so as to be rotatable around the vertical axis. And comprising
The attached part is connected and fixed to the operating part support frame,
The relay support portion is connected to the step main body for getting on and off so as to be relatively rotatable,
The work vehicle according to claim 1 or 2, wherein the step portion for getting on and off is connected and supported by the operating portion support frame by connecting and fixing the attached portion and the relay support portion.   The work vehicle according to claim 3, wherein the attached portion is formed of a plate-like body that is connected and fixed to an outer surface of the machine body of the operation unit support frame.   The relay support portion is connected to the attachment portion in a surface-joined state with a plate-like attachment member, and extends from the attachment member toward the outer side of the machine body, and the step for getting on and off the extension end portion thereof. The work vehicle according to claim 3, further comprising a support member for connecting the main body so as to be relatively rotatable.   The work vehicle according to claim 5, wherein the support member is formed of a box-shaped body in which a bottom surface portion, an upper surface portion, and a vertical wall portion continuous in the circumferential direction are integrally connected.   The support member is connected to the step body for getting on and off via a rotation support shaft so as to be relatively rotatable, and has a tapered shape that becomes narrower toward the rotation support shaft from the mounting member in plan view. The work vehicle according to claim 5 or 6, wherein the work vehicle is formed.   The work vehicle according to claim 7, wherein an end portion on the relay support portion side of the step body for getting on and off is formed in a tapered shape that becomes narrower toward the rotation support shaft in a plan view.   The work vehicle according to any one of claims 3 to 8, further comprising a position holding mechanism capable of holding the step main body for boarding / exiting at each of the boarding operation position and the storage position. A fuel tank is provided behind the operating unit,
A fuel filler is provided at a position higher than the upper surface of the fuel tank,
The work vehicle according to claim 9, wherein the position holding mechanism is configured to be able to hold the position of the getting-on / off step body at an intermediate position between the getting-on / off action position and the storage position.   The work vehicle according to claim 9 or 10, wherein the position holding mechanism is provided across the step main body for getting on and off and the relay support portion. An external boarding platform for entering and exiting is provided on the lateral side outward of the stepping part for getting on and off of the driving part,
12. The operation unit capable of switching the position holding mechanism between a position holding state and a holding release state is provided in a state of protruding upward from the external boarding board. Working vehicle. An opening is formed in a state in which the external boarding board can be inserted vertically.
The work vehicle according to claim 12, wherein the operation unit is provided in a state of protruding upward through the opening.   The work vehicle according to claim 1, wherein the driving unit is mounted and supported on the driving unit support frame via a vibration isolation mechanism.   The work vehicle of any one of Claims 1-14 provided with the cabin which covers the upper part of the said driving | operation part.

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