JP6902995B2 - Paddy field work machine - Google Patents

Description

The present invention relates to a passenger-type paddy field working machine provided with a fertilizer application device and a blower for supplying a transport wind at the rear portion of a traveling machine body provided with a driving unit step.

As described above, some paddy field work machines equipped with a fertilizer application device and a blower together with the operation unit step are configured as follows.
In this paddy field work machine, a fertilizer application tank of the fertilizer application device and a blower for supplying transport air are provided at the rear of the traveling machine and above the operation unit step (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-007151 (see paragraphs [0141] and [0142], and FIGS. 1 and 2).

As in the structure described in Patent Document 1, when the fertilizer tank and the blower for supplying the transport air are provided at the rear part of the traveling machine body above the operation unit step, the fertilizer is input to the fertilizer tank from the upper side. It is useful in this respect because it can be facilitated and it is possible to easily secure a space for arranging the transport air supply pipe in the blower by avoiding the space under the operation unit step where various parts are complicated.
However, if the blower for supplying the transport air is provided on the upper surface side of the step of the operation unit, the following problems may occur.
That is, when fertilizer is put into the fertilizer application tank, or when the seedling replenishment work is performed on the seedling loading table of the rear seedling planting device, the work is performed by putting a foot near the rear end of the operation unit step. Is common. At this time, if the blower is provided on the upper side of the driver step, there is a risk of accidentally stepping on or kicking the blower in a situation where it is difficult to see the feet, and the blower itself or the blower is connected to the blower. There is room for improvement in that there is a risk of damaging the transport air supply piping and the like.

The present invention is to provide an easy-to-use paddy field work machine by making it possible to avoid accidentally touching the blower with the foot when putting the foot on the rear part of the driving unit step.

In order to achieve the above object, the paddy field working machine according to the present invention winds a fertilizer application device and fertilizer delivered from the fertilizer application device to a fertilizer target location at the rear part of a traveling machine having a driver's seat on the operation unit step. A blower for supplying transport air for transporting is provided, and at least a part of the fertilizer application tank and the blower in the fertilizer application device is provided at a position higher than the upper surface of the operation unit step, and is provided on the outer peripheral side of the blower. Is provided with a guard member that protects the contact with other objects, the guard member is connected to a support member in which one end of the guard member supports the fertilizer application device, extends in the left-right direction in front of the blower, and the guard. The feature is that the other end of the member extends to the step of the traveling machine body.

According to the present invention, since the guard member for protecting the contact with other objects is provided on the outer peripheral side of the blower, the contact of other objects with the blower can be suppressed.
Therefore, when you put your foot on the upper surface of the driver's step to add fertilizer or replenish seedlings, even if it is difficult to see your feet with the fertilizer bag or mat-shaped seedlings you have in your hand, you accidentally use the blower. It has the advantage that there is little risk of trampling or kicking it to damage it.
The guard member is connected to the support member that supports the fertilizer application device. Therefore, a support member having a relatively high strength so as to be able to support the weight of the fertilizer application device can also be used as a part of the guard member, and the structure can be simplified by using the constituent members in combination, and the support member can be used. It is possible to improve the strength by utilizing the strength of.

Further, in order to achieve the above object, in the paddy field working machine according to the present invention, a fertilizer application device and a fertilizer delivered from the fertilizer application device are applied to a fertilizer target location at the rear portion of the traveling machine having a driver's seat on the driver's step. A blower for supplying transport air for transporting wind power to is provided, and at least a part of the fertilizer application tank and the blower in the fertilizer application device is provided at a position higher than the upper surface of the operation unit step, and the blower A guard member that protects contact with other objects is provided on the outer peripheral side, and the blower is provided between the handrail for raising and lowering the step of the driving unit and the support member that supports the fertilizer application device, and is used for raising and lowering. The handrail has a front vertical rod portion extending in the vertical direction of the traveling machine body and a rear vertical rod portion extending in the vertical direction of the traveling machine body on the rear side of the front vertical rod portion, and the guard member comprises. One end of the guard member is connected to the front vertical rod portion of the elevating handrail and the front vertical rod portion of the rear vertical rod portion , extends in the front-rear direction of the blower, and extends in the left-right direction of the guard member. The other end is connected to a support member that supports the fertilizer application device.

According to the present invention, since the guard member for protecting the contact with other objects is provided on the outer peripheral side of the blower, the contact of other objects with the blower can be suppressed.
Therefore, when you put your foot on the upper surface of the driver's step to add fertilizer or replenish seedlings, even if it is difficult to see your feet with the fertilizer bag or mat-shaped seedlings you have in your hand, you accidentally use the blower. It has the advantage that there is little risk of trampling or kicking it to damage it.
Then, the guard member is connected to the handrail for raising and lowering to the driving unit step. For this reason, the elevating handrail, which has a relatively high strength, can be used as a part of the guard member, and the structure is simplified by using the constituent members as well, and the strength using the strength of the elevating handrail is used. It can be improved.

In the above configuration, it is preferable that the guard member is provided between the blower and the driver's seat located on the front side of the blower.

According to this configuration, when an operator moves from the driver's seat side to the rear blower side on the driver's step, the guard member reliably limits the range of movement under the feet and suppresses damage to the blower. Can be done.

In the above configuration, it is preferable that the guard member is provided with a temporary stand provided with a mounting surface for temporary placement.

According to this configuration, since the temporary stand can be provided by using the guard member, the guard member can be used as a support means for the temporary stand, and the structure can be simplified.
When fertilizer is put into the fertilizer tank, a heavy fertilizer bag is temporarily placed on the temporary storage table, and the bag is changed from that state to a state where it is easy to put the fertilizer into the fertilizer tank. It is easy to put fertilizer into the tank in a comfortable position.

In the above configuration, it is preferable that the temporary storage table is provided at a height position corresponding to an intermediate portion between the upper surface of the operation unit step and the fertilizer inlet of the fertilizer application tank.

According to this configuration, the height of the temporary stand is the height corresponding to the middle part between the upper surface of the step of the operation unit and the fertilizer inlet of the fertilizer application tank. Therefore, the fertilizer bag is mounted on the temporary stand and the fertilizer bag is mounted on the temporary stand. When the fertilizer is put into the fertilizer tank, the lifting height of the fertilizer bag is relatively small, and the work can be easily performed.

In the above configuration, it is preferable that the temporary stand is provided at a position where at least a part thereof overlaps the upper side of the blower in a plan view.

According to this configuration, at least a part of the temporary stand overlaps the upper side of the blower in a plan view, so that the temporary stand can easily play a role as a protective member for suppressing contact with other objects from the upper side of the blower. ..

In the above configuration, it is preferable that the intake-side piping connected to the blower is arranged on the side of the machine body in the left-right direction from the outermost edge of the operation unit step.

According to this configuration, the piping on the intake side connected to the blower does not protrude to the outside of the machine from the outermost edge of the operation unit step in the left-right direction, so this piping on the intake side is different from other things. Contact can be suppressed.

It is a side view which shows the whole of a riding type rice transplanter. It is a top view which shows the whole of a riding type rice transplanter. It is a top view which shows the correlation between a driving part step and a wheel and other device. It is a top view which shows the positional relationship between a blower and a guard member. It is a perspective view which shows the positional relationship between a blower and a guard member. It is a perspective view which shows the driving part step. It is an exploded perspective view which shows the driving part step. It is sectional drawing which shows the cross section by line VIII-VIII in FIG. It is a perspective view which shows the positional relationship between a blower and a guard member in another embodiment. It is a top view which shows the operation part step in another embodiment.

Hereinafter, an example of the embodiment of the present invention will be described based on the description in the drawings.
Unless otherwise specified, the front-rear direction and the left-right direction in the embodiment are described as follows. As shown in FIGS. 1 and 2, the traveling direction of the forward side is "forward dB" and the traveling direction of the backward side is "rear dB" during the working travel of the paddy field work machine. The direction corresponding to the right side is the "right dR" and the direction corresponding to the left side is the "left dL" with respect to the forward posture in the front-rear direction.

[Overall configuration of paddy field work machine]
FIG. 1 shows the side surfaces of a passenger-type rice transplanter, which is an example of the paddy field working machine according to the present invention, and FIG. 2 shows the planes thereof. This passenger-type rice transplanter is equipped with a seedling planting device 2 behind the traveling machine 1 to perform seedling planting work.
The traveling machine body 1 includes a vehicle body frame 10 having a pair of left and right main frames 10A and 10A facing the front and rear of the vehicle body, and a pair of left and right front wheels 11F and 11F and a pair of left and right rear wheels 11R mounted on the lower part of the vehicle body frame 10. , 11R is configured to be self-propelled.

A driving unit A equipped with an engine 12 and a mission case 13 that output driving force to the front wheels 11F and the rear wheels 11R is provided at the front portion of the traveling machine body 1. A boarding-type driving unit B having a driver's seat 15 is provided on the rear side of the traveling machine body 1.
In the driving unit B, a driving unit step 3 for boarding is provided on the upper side of the vehicle body frame 10. A driver's seat 15 is provided on the driver's seat step 3, and the steering wheel 14 arranged at the rear of the driving unit A can be operated while the driver's seat 15 is seated on the driver's seat 15.
At the front part of the driving part B, on the lateral side of the traveling machine 1 corresponding to the left and right lateral outsides of the driving part A, a spare seedling stand for mounting the spare seedlings with the front part of the driving part step 3 sandwiched between them. 16 is erected. A fertilizer application device 4 for eight rows is provided at the rear of the driver unit B on the rear side of the driver's seat 15, and the passenger-type rice transplanter is configured to have a mid-mount fertilizer application specification.

[Sapling planting device]
The seedling planting device 2 is connected to the rear portion of the vehicle body frame 10 so as to be able to move up and down via a link mechanism 17.
In this seedling planting device 2, a seedling stand 20 for eight-row planting on which eight mat-shaped seedlings can be mounted, a feed case 21 in which the driving force from the engine 12 is input via the input shaft 2a, and It is provided with four planting drive cases 22 which are arranged at predetermined intervals in the lateral direction of the vehicle body. In each of the four planting drive cases 22, seedling planting mechanisms 23 are movably provided on both lateral sides on the rear end side. At the bottom of the planting frame (not shown) connecting each planting drive case 22, four ground leveling floats 24 are installed in a state of being lined up in the lateral direction of the vehicle body.

Each seedling planting mechanism 23 drives two planting claws 23a at positions phased 180 degrees around the center of rotation in the left-right direction by a driving force transmitted from the feed case 21 to the planting drive case 22. It has a well-known structure. Each planting claw 23a is driven so that its tip draws a long rotation locus in the vertical direction, and the two planting claws 23a alternately take out the planted seedlings from the lower end of the seedling stand 20 and level the ground. A seedling planting exercise is carried out to plant in the mud layer that has been leveled by the float 24.
In this seedling planting device 2, the link mechanism 17 is swung up and down with respect to the vehicle body frame 10 by the elevating cylinder 18, so that the ground leveling float 24 is in contact with the mud surface of the field and the ground leveling float. Twenty-four is raised and lowered away from the mud surface of the field to a rising non-working state.

[Fertilizer application device]
The fertilizer application device 4 includes a fertilizer application tank 40 arranged on the back side of the driver's seat 15 for storing powdery and granular fertilizer, a feeding portion 41 arranged on the lower side thereof, and a seedling planting device 2 for delivering the fed fertilizer. It is provided with a fertilizer application hose 42 that is conveyed toward the groove-growing device 25 prepared for the above. The fertilizer application hose 42 is made of a flexible tube made of soft resin or the like, and is configured to be elastically deformable as the seedling planting device 2 moves up and down.

The fertilizer application device 4 is connected and fixed to the vehicle body frame 10 via a fertilizer application support frame 43 (corresponding to a support member).
That is, on the vehicle body frame 10 side, rear vertical frames 10B and 10B along the main frames 10A and 10A are erected on the rear upper surfaces of the main frames 10A and 10A along the left and right pairs of front and rear directions.
A horizontal frame material is extended along the left-right direction on the upper part of the left and right rear vertical frames 10B, and the fertilizer application support frame 43 is formed by the horizontal frame material.

[Blower]
A blower 5 for fertilizer application is provided on the left lateral side of the fertilizer application device 4 as a means for supplying a transport wind for wind-transmitting the fertilizer delivered from the delivery unit 41 of the fertilizer application device 4 by the fertilizer application hose 42. ..
The blower 5 is provided with a blower fan (not shown) that rotates around a rotation axis in the vertical direction in the blower case 50. The built-in blower fan is composed of a turbo type or sirocco type centrifugal fan that sucks in outside air from below along the center of rotation and discharges it in the tangential direction. An electric motor 51 that rotationally drives the blower fan is provided on the upper surface side of the blower case 50 in a state of being located on the upper side of the blower fan.
An intake pipe 52 is connected to a portion corresponding to the rotation center of the blower fan on the lower side of the blower case 50. An air supply duct 53 that supplies the conveyed air to the fertilizer application device 4 is connected to the outer peripheral portion of the blower case 50 along the tangential direction with respect to the rotation locus of the blower fan.

Therefore, the gas taken in from the intake pipe 52 is exhausted from the outside in the circumferential direction of the blower case 50 in the tangential direction, and is sent to the air supply duct 53 of the fertilizer application device 4 as a transport air.
The fertilizer delivered from the feeding portion 41 is mixed with the transport air in the air supply duct 53, and is wind-transported to the groove grooving device 25 at the fertilizer target portion via the fertilizer application hose 42.

As shown in FIGS. 1 and 4, the blower 5 has a state in which the large diameter portion 50a in which the blower fan is housed is located above the upper surface of the rear end portion of the operation unit step 3 in the blower case 50. Therefore, it is arranged on the rear side of the driving unit step 3. The intake pipe 52 connected to the lower side of the blower case 50 extends downward from the operation unit step 3. As shown in FIG. 3, the pipe 52 has a front end side extending to the vicinity of the driving portion A, and is provided so as to take in a high-temperature and dry gas heated by the waste heat of the engine 12.
Further, as shown in FIG. 4, the intake pipe 52 is arranged on the side of the machine body in the left-right direction from the outermost edge of the operation unit step 3 in the left-right direction.

The intake pipe 52 is formed in the shape of a round pipe having a circular cross section near the connection point to the blower case 50, but the entire pipe 52 is not formed in the same shape. That is, as shown in FIG. 9, the shape of the pipe 52 is an extension portion to the front side of the connection portion to the blower case 50, and the portion corresponding to the lower side of the operation unit step 3 is larger than the vertical diameter. It is formed in an oval cross section so as to have a flat shape with a wide diameter in the left-right direction.
This is because the cross-sectional area of the pipe 52 as the intake path can maintain a high vehicle height in the lower abdomen of the machine body while ensuring a cross-sectional area equal to or larger than a predetermined value. Actually, the cross-sectional area of the oval portion is set to be slightly wider than the cross-sectional area of the circular portion in consideration of passage resistance and the like.

[Guard member]
As shown in FIGS. 3 to 5, a guard member 6 is provided on the front side of the blower 5.
The guard member 6 is made of a metal round pipe material, and one end of the machine body side is bolted to a fertilizer application support frame 43 that supports the fertilizer application device 4. Then, the other end on the outer side of the machine body passes outside the lateral outer edge of the driving unit step 3 and is connected to a part of the vehicle body frame 10 existing under the driving unit step 3.

Of the guard members 6, the lateral rod portion 60 located immediately in front of the blower case 50 and along the left-right direction is located slightly forward of the outer peripheral edge of the blower case 50 as shown in FIGS. 4 and 5, and is a blower. It is located higher than the large diameter portion 50a of the case 50, and is arranged so as to restrict the contact of the foot with the blower case 50.
The vertical rod portion 61, which is located laterally outward of the horizontal rod portion 60 and runs in the front-rear direction, is located slightly higher than the upper surface of the operating unit step 3 and is located along the lateral outer edge of the operating unit step 3. It is arranged so as to be located on the same side as the lateral outer edge of No. 3 or slightly laterally outward. Therefore, the vertical rod portion 61 also plays a role of restricting the foot hung on the driving unit step 3 from shifting laterally outward from the lateral outer edge of the driving unit step 3.

The guard member 6 is provided on one side of the fuselage on the side where the blower 5 is provided, but apart from this, the guard member 6 is also provided on the other side of the fuselage on the side where the blower 5 is not provided. A second guard member 62 is provided.
Like the guard member 6, the second guard member 62 is also bolted to one end of the fertilizer application support frame 43 that supports the fertilizer application device 4, and the other end is outside the lateral outer edge of the operation unit step 3. Through it, it is connected to a part of the vehicle body frame 10 existing under the driver step 3.
Like the guard member 6, the second guard member 62 also includes a horizontal rod portion 63a along the left-right direction and a vertical rod portion 63b located laterally outside the lateral rod portion 63a and along the front-rear direction. Even on the side where the blower 5 is not provided, the foot hung on the driving unit step 3 is restricted from shifting laterally outward from the lateral outer edge of the driving unit step 3 (see FIG. 3). ..

[Operation step]
The operation unit step 3 provided in the operation unit B is configured as follows.
The operation unit step 3 is made by processing a synthetic resin material by injection molding, and has a higher degree of freedom in designing the shape and structure than a processed product by blow molding, and is easy to mold with high accuracy. Therefore, it is possible to select a relatively free shape and structure.

As shown in FIGS. 3, 6 and 7, the driver step 3 is a front step 3A located at the front end of the machine and a main step located in front of the driver's seat 15 in the front-rear direction of the machine. A portion 3B and a rear step portion 3C located on the rear side of the driver's seat 15 are provided.
The front step portion 3A and the main step portion 3B have substantially flush upper surfaces, but the rear step portion 3C has an upper surface at a position one step higher than the upper surfaces of the front step portion 3A and the main step portion 3B. ..
That is, on the upper surface of the rear step portion 3C, the driver boarded when replenishing the fertilizer to the fertilizer tank 40, or the mat-shaped seedlings taken out from the spare seedling stand 16 were placed on the seedling stand 20 of the seedling planting device 2. It is set higher than the upper surfaces of the front step portion 3A and the main step portion 3B so that the driver can rest his / her feet when replenishing.

The front step portion 3A is provided outside the portion where the engine bonnet 19 of the driving portion A exists. That is, the area corresponding to the engine room covered by the engine bonnet 19 is cut out, and the rear side is opened in a plan view so that the front side and the left and right sides of the engine bonnet 19 have upper surfaces on which boarding is possible. The front step portion 3A is formed by the shaped step plate 30.

The main step portion 3B is more than the right main step plate 31R and the left main step plate 31L located on the front side of the position of the driver's seat 15 in the front-rear direction of the aircraft, their right main step plate 31R and the left main step plate 31L. It is provided with a right main expansion plate 33R located laterally outward and a left main expansion plate 33L. Further, among the right rear step plate 32R and the left rear step plate 32L, which will be described later, the upper surface of the front plate portion 32a located on the front side of the rising portion 3D is also included as a part of the main step portion 3B.
The right main expansion plate 33R and the left main expansion plate 33L are fixed to the vehicle body frame 10 separately from the right main step plate 31R and the left main step plate 31L, respectively, and are fixed to the right main step plate 31R and the left main step plate 31L, respectively. Is separately removable.
Further, at the laterally outer positions of the right main expansion plate 33R and the left main expansion plate 33L, boarding / alighting steps 64 for getting on / off the driving unit step 3 from the lateral side are provided.

The right main step plate 31R and the left main step plate 31L are left and right division lines L1 (corresponding to the division line) that match the center line CL in the left-right direction of the traveling machine body 1, and are positions that divide the main step portion 3B into two left and right. It is divided by and is individually removable.
The left-right dividing line L1 is formed so as to be connected to a through hole 31a provided in the central portion of the traveling machine body 1 in the left-right direction. The through hole 31a is a through hole 31a for exposing the grip portion of the operating tool 13a erected above the mission case 13 onto the operating portion step 3. Since the left and right dividing lines L1 are formed so as to be connected to the through holes 31a in this way, the right main step plate 31R and the left main step plate 31L do not require attachment / detachment work of through parts such as the operating tool 13a. Can be attached and detached.

As shown in FIGS. 3, 6 and 7, a floor mat 35 (corresponding to a covering member) is laid over the right main step plate 31R and the left main step plate 31L. The floor mat 35 has a length in the front-rear direction that covers almost the entire left-right division line L1 located at the center of the main step portion 3B, and in the left-right direction, the left and right see-through floor portions provided on the main step portion 3B, which will be described later. It has a length in the left-right direction that is about the width between the seven.
Also in this floor mat 35, a through hole 35a having the same shape is formed at a position corresponding to the existence position of the through hole 31a connected to the left and right dividing line L1.

The rear step portion 3C is provided on the rear side of the main step portion 3B and at a position higher than the main step portion 3B with the rising portion 3D interposed therebetween.
The rear step portion 3C includes a right rear step plate 32R, a left rear step plate 32L, a right rear expansion plate 34R located laterally outside the right rear step plate 32R and the left rear step plate 32L, and a left rear step plate 34R. It is equipped with a rear expansion plate 34L.

The right rear step plate 32R and the left rear step plate 32L are from the rising plate portion 32b constituting the rising portion 3D, the front plate portion 32a located on the front side of the rising plate portion 32b, and the rising plate portion 32b, respectively. Also includes a rear plate portion 32c located on the rear side.
The rear plate portions 32c and 32c, and the right rear expansion plate 34R and the left rear expansion plate 34L located on the lateral outer sides of the rear plate portions 32c and 32c constitute the rear step portion 3C located at a position higher than the main step portion 3B. ..

For mounting on the opposite portion of the right rear step plate 32R and the left rear step plate 32L so that the lower surface side of the driver's seat 15 is supported by the seat fixing portion 65 (see FIG. 8) provided in the upper part of the rear vertical frame 10B. An opening 36 is provided.
The mounting opening 36 has an upper notch 36a provided in the rear plate portion 32c so as to open a range overlapping the seat fixing portion 65 in a plan view, and a range overlapping the seat fixing portion 65 in a front-rear direction view. It is composed of a combination of a front notch 36b provided in the rising plate portion 32b so as to open the surface.

The mounting opening 36 is a vertical division line L2 (corresponding to a division line) provided in the rising plate portion 32b so that the front end side is connected to the left and right division lines L1 of the right main step plate 31R and the left main step plate 31L described above. The rear end side is connected to another left and right division line L3 (corresponding to the division line) formed in the rear plate portion 32c.
As shown in FIG. 3, another left-right dividing line L3 formed on the rear plate portion 32c is formed at a position slightly shifted to the left from the center line CL in the left-right direction of the traveling machine body 1. Therefore, another left / right dividing line L3 is not aligned with the left / right dividing line L1 of the right main step plate 31R and the left main step plate 31L and the vertical dividing line L2 in the same straight line.
Therefore, the right rear step plate 32R and the left rear step plate 32L are divided at the center of the machine at the location where the vertical division line L2 on the front end side exists, but at the location where another left / right division line L3 exists. The parts are not symmetrical, but asymmetrical.
This is a place where the members and shapes fixed around the seat fixing portion 65 are not necessarily arranged symmetrically, and when one of the right rear step plate 32R and the left rear step plate 32L is attached / detached in the left-right direction. This is so that the driver's seat 15 and the other right rear step plate 32R or the left rear step plate 32L can be conveniently performed without being attached or detached.

At the location where the vertical division line L2 exists, one of the opposing end edges of the right rear step plate 32R and the left rear step plate 32L, that is, the facing end edge on the right side is a straight line in this embodiment. It is a shaped facing edge 37a, and is a bent-shaped facing edge 37b in which the other facing edge, that is, the left facing edge is partially recessed toward the side away from the one facing edge 37a.
The straight facing edge 37a and the bent facing facing edge 37b form a U-shaped through hole 37 penetrating the driving portion step 3. The U-shaped through hole 37 is formed so that the hole diameter in the direction along the vertical division line L2 is longer than the hole diameter in the direction intersecting the vertical division line L2. A swing operating tool 66 such as a hydraulic lever is inserted into the U-shaped through hole 37 so that the swing operation can be performed.
In this way, the U-shaped through hole 37 formed including the vertical division line L2 needs to attach / detach the swing operating tool 66 when attaching / detaching the right rear step plate 32R or the left rear step plate 32L. Desorption work can be performed without any problem. Further, even if the opening length required for the swing operation is set to be long, since it exists on the vertical division line L2, it is not so noticeable for its size, and a large structural change is required. Absent.

Apart from the left and right division lines L1, L2, L3, the U-shaped step plate 30, the right main step plate 31R, and the left main step plate 31L are front and rear at the boundary between the front step portion 3A and the main step portion 3B. It is configured so that it can be divided back and forth by the direction dividing line L4 (corresponding to the dividing line).
Further, the main step portion 3B and the rear step portion 3C are also configured to be able to be divided in the front-rear direction by the front-rear direction dividing line L5 at a position deviated from the rising portion 3D in the front-rear direction.
In this embodiment, the right main step plate 31R and the left main step plate 31L, and the right rear step plate 32R and the left rear step plate 32L can be divided back and forth by the front-rear direction dividing line L5 on the front side of the rising portion 3D. Is.

The U-shaped step plate 30 in the front step portion 3A, the right main step plate 31R and the left main step plate 31L in the main step portion 3B, and the right rear step plate 32R and the left rear step plate 32L in the rear step portion 3C. Each of the, is fixed to the vehicle body frame 10 by the step fixing portion 38.
As shown in FIGS. 3, 6, and 7, the step fixing portions 38 are provided in a relatively large number at locations close to the front-rear direction dividing lines L4 and L5, or the left-right dividing lines L1 and L3, and near the outer peripheral edge. ing.

The right rear step plate 32R in the rear step portion 3C has an opening 39a in which the tool holder 67 can be mounted and an opening 39b in which the cup holder 68 can be mounted at a portion corresponding to the periphery of the driver's seat 15 in the rear plate portion 32c. It is formed.

[Clairvoyant floor]
The driving unit step 3 is provided with a see-through floor unit 7 that can see below the traveling machine body 1.
The fluoroscopic floor portion 7 is provided on each of the left and right sides of the front step portion 3A, the main step portion 3B, and the rear step portion 3C. Each of these fluoroscopic floor portions 7 is provided at a location closer to the lateral side than the driver's seat 15 in the left-right direction.

That is, the first fluoroscopic floor portion 7 provided in the main step portion 3B is provided at a position where the driver sitting in the driver's seat 15 can easily see the direction of the front wheels 11F and the like.
The second fluoroscopic floor portion 7 provided in the rear step portion 3C is provided at a position where the driver seated in the driver's seat 15 can easily see the direction of the rear wheels 11R and the like by looking back.
The third perspective floor portion 7 provided in the front step portion 3A is provided at a position where the driver seated in the driver's seat 15 can visually recognize the front of the aircraft below the front step portion 3A.

The fluoroscopic floor portion 7 is composed of a group of through holes 70 arranged radially along the radial direction starting from the center of the seat portion of the driver's seat 15, the existing position of the driver's seat 15, or the position near the driver's seat 15. There is. That is, the starting point in the radial direction is based on the position of the driver's line of sight in a state where the driver sitting in the driver's seat visually observes the driver's seat, but since there are some individual differences, the driver's seat 15 There is no problem as long as there is. Further, to some extent, the area around the driver's seat 15 outside the range where the driver's seat 15 exists may be within a range in which the body can be tilted or stood up to look into the driver's seat 15.

The see-through floor portion 7 is composed of a grid-like member formed by combining a radial crosspiece member 71 along the arrangement direction of the radial through holes 70 group and a crossing direction rail member 72 intersecting the radial crosspiece member 71. There is.
Of these, the crossing direction rail member 72 provided in the main step portion 3B and the rear step portion 3C is formed substantially along the front-rear direction of the fuselage, and whether or not the front wheels 11F and the rear wheels 11R are directed in the straight-ahead direction. It also plays a role as an index of.

In this way, the see-through floor 7 is arranged radially along the radial direction starting from the center of the seat of the driver's seat 15, the position where the driver's seat 15 exists, or the position near the driver's seat 15. When configured, the area of the area visible through the fluoroscopic floor 7 by the driver who visually observes from the center of the seat of the driver's seat 15, the existing position of the driver's seat 15, or the position near the driver's seat 15 is expanded as much as possible. It is possible to improve the visibility.
Moreover, among the radial crosspiece members 71 and the crossing direction rail members 72 that form the through hole 70 group of the fluoroscopic floor portion 7, the distance between the adjacent crossing direction rail members 72 is the distance between the adjacent radial direction rail members 71. Is set wider than.
Since the distance between the adjacent cross-direction rail members 72 is set wide in this way, the distance between the adjacent cross-direction rail members 72 is narrower than the distance between the adjacent radial cross-direction rail members 71. Alternatively, as compared with the case where the settings are set to the same level, there is less risk of narrowing the area of the visible area of the driver who sits on the driver's seat 15 and visually observes the fluoroscopic floor portion 7. Therefore, the visibility of the driver can be further improved.

[1 of another embodiment]
In the above embodiment, one end of the guard member 6 on the inside of the machine body is bolted to the fertilizer application support frame 43 supporting the fertilizer application device 4, and the other end is a vehicle body frame existing under the driver step 3. Although the structure connected to a part of 10 is illustrated, the structure is not limited to this structure.
For example, as shown in FIG. 9, a handrail 8 having a front vertical rod portion 8a and a rear vertical rod portion 8b is provided on the horizontal side portion of the operation unit step 3, and the handrail 8 is provided on the outside of the machine body of the guard member 6. The side end may be supported.
At this time, one end of the guard member 6 on the machine body side may be supported by the fertilizer application support frame 43 as shown in FIG. 9, or is not supported by the fertilizer application support frame 43 and is located below the rear step portion 3C. It may be supported by another fixed part of the aircraft.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[2 of another embodiment]
In the above embodiment, a structure in which the guard member 6 is independently provided on the front side of the blower 5 has been illustrated, but the structure is not limited to such a structure.
For example, as shown in FIG. 9, the guard member 6 may be used and the guard member 6 may be provided with a temporary storage base 69.
The temporary storage table 69 is effective for temporarily placing the fertilizer bag when the fertilizer is put into the fertilizer tank 40, and is effective when the fertilizer bag is temporarily placed on the upper surface of the rear step portion 3C as the operation unit step 3 and the fertilizer application tank 40. It is desirable that the fertilizer is provided at a height corresponding to the middle part with the fertilizer inlet.
Further, if the temporary storage table 69 is provided at a position where at least a part overlaps the upper side of the blower 5 in a plan view, it also functions as a protective member for the upper side of the blower 5, which is more effective. ..
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[3 of another embodiment]
In the above embodiment, the structure in which the pipe 52 on the intake side of the blower 5 is provided outside the rear end of the rear step portion 3C is illustrated, but the present invention is not limited to this.
For example, as shown in FIG. 9, the pipe 52 may be provided so as to penetrate the rear step portion 3C. In this case, it is effective in that the bending of the pipe 52 and the arrangement distance can be reduced to some extent.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[4 of another embodiment]
In the above embodiment, a structure in which the fertilizer application device 4 is provided at the rear of the traveling machine body is illustrated, but the structure is not limited to this structure.
For example, as shown in FIG. 10, the structure may not include the fertilizer application device 4.
In this case, as the operation unit step 3, the rear step unit 3C may be configured as follows.
That is, an extension step plate 9 is provided on the rear side of the right rear step plate 32R and the left rear step plate 32L, and the rear step is provided by the right rear step plate 32R, the left rear step plate 32L, and the extension step plate 9. Part 3C may be configured.
In this case, another front-rear direction dividing line L6 is formed between the right rear step plate 32R and the left rear step plate 32L and the extension step plate 9. Therefore, the extension step plate 9 can be attached and detached separately from the right rear step plate 32R and the left rear step plate 32L, and the right rear step plate 32R or the left rear step plate 32L can be attached and detached separately from the extension step plate 9. Can be done.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[5 of another embodiment]
In the above embodiment, considering excluding the expansion plates 33R, 33L, 34R, 34L, the left and right division lines L1, L2, L3 and the front-rear direction division lines L4, L5 are used as the operation unit step 3. Although the structure divided into five is illustrated, the structure is not limited to this structure.
For example, the U-shaped step plate 30 of the front step portion 3A can also be divided into left and right, or the right main step plate 31R and the right rear step plate 32R are integrated to form the left main step plate 31L and the left rear step plate 32L. The right main step plate 31R and the right rear step plate 32R, or the left main step plate 31L and the left rear step plate 32L may be integrally attached and detached.
Not limited to 5 divisions, it may be possible to divide into an appropriate plurality of divisions of 2 or more. Further, it may be configured so that more divisions such as 6 divisions or more are possible.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[6 of another embodiment]
In the above embodiment, the operation unit step 3 has a structure that can be divided, but the present invention is not limited to this, and an operation unit step 3 having an integral structure that cannot be divided may be adopted.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[7 of another embodiment]
In the above embodiment, the perspective floor portion 7 is provided on both the left and right sides of the front step portion 3A, the main step portion 3B, and the rear step portion 3C, respectively. It is not limited to the structure.
For example, a structure provided only in the front step portion 3A, only the main step portion 3B, or only in the rear step portion 3C, or only in the front step portion 3A and the main step portion 3B, only in the main step portion 3B and the rear step portion 3C, Alternatively, it may be provided only in the front step portion 3A and the rear step portion 3C.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

[8 of another embodiment]
In the above embodiment, a structure in which the fluoroscopic floor portion 7 is formed of a grid-like member formed by a combination of a radial crosspiece member 71 and a crossing direction rail member 72 intersecting the radial crosspiece member 71 has been exemplified. , Not limited to this structure.
For example, a large number of through holes 70 may be formed in the operation unit step 3 without adopting the grid-like member.
For other configurations, the same configurations as those in the above-described embodiment may be adopted.

The present invention is not limited to a riding type rice transplanter provided with a seedling planting device 2 having an 8-row planting specification as shown in the embodiment, but a riding type provided with a seedling planting device 2 having a different number of planting rows. It can be applied to various riding type paddy field working machines such as rice transplanters, direct sowing machines for sowing seeds in fields, and chemical sprayers.

1 Traveling machine 3 Driving unit step 4 Fertilizer application device 5 Blower 6 Guard member
8 Lifting handrail (handrail)
8a Front vertical rod
8b Rear vertical rod 15 Driver's seat 40 Fertilizer tank 43 Support member 52 Piping 69 Temporary stand

Claims (7)

At the rear of the aircraft with a driver's seat on the driver's step,
Fertilizer and fertilizer
A blower for supplying a transport wind for transporting the fertilizer delivered from the fertilizer application device to a fertilizer target location by wind power is provided.
At least a part of the fertilizer application tank and the blower in the fertilizer application device is provided at a position higher than the upper surface of the operation unit step.
A guard member for protecting contact with other objects is provided on the outer peripheral side of the blower.
Paddy field work in which one end of the guard member is connected to a support member supporting the fertilizer application device, the front of the blower extends in the left-right direction, and the other end of the guard member extends to a step of a traveling machine body. Machine. At the rear of the aircraft with a driver's seat on the driver's step,
Fertilizer and fertilizer
A blower for supplying a transport wind for transporting the fertilizer delivered from the fertilizer application device to a fertilizer target location by wind power is provided.
At least a part of the fertilizer application tank and the blower in the fertilizer application device is provided at a position higher than the upper surface of the operation unit step.
A guard member for protecting contact with other objects is provided on the outer peripheral side of the blower.
The blower is provided between the handrail for raising and lowering the step of the driving unit and the support member for supporting the fertilizer application device.
The elevating handrail has a front vertical rod portion extending in the vertical direction of the traveling machine body and a rear vertical rod portion extending in the vertical direction of the traveling machine body on the rear side of the front vertical rod portion.
One end of the guard member is connected to the front vertical rod portion of the elevating handrail and the front vertical rod portion of the rear vertical rod portion , and extends in the front-rear direction of the blower in the left-right direction. A paddy field working machine in which the other end of the guard member is connected to a support member that supports the fertilizer application device. The paddy field working machine according to claim 1 or 2, wherein the guard member is provided between the blower and the driver's seat located on the front side of the blower. The paddy field working machine according to any one of claims 1 to 3, wherein the guard member is provided with a temporary storage table provided with a mounting surface for temporary storage. The paddy field working machine according to claim 4, wherein the temporary storage table is provided at a height position corresponding to an intermediate portion between the upper surface of the operation unit step and the fertilizer inlet of the fertilizer application tank. The paddy field working machine according to claim 4 or 5, wherein the temporary stand is provided at a position where at least a part overlaps the upper side of the blower in a plan view. The paddy field work machine according to any one of claims 1 to 6, wherein the pipe on the intake side connected to the blower is arranged on the side of the machine body in the left-right direction from the outermost edge of the operation unit step. ..

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