JP2020120632A - Paddy field working machine - Google Patents

Abstract

To provide a paddy field working machine configured to easily viewing a direction of wheels and a present location from an easily-assemblable driving-part step.SOLUTION: A paddy field working machine comprises a driving-part step 3, and a driver seat 15 provided on the driving-part step 3, where the driving-part step 3 is comprised of a resin body formed integrally in a horizontal direction of a machine body. A see-through floor part 7 through which a machine body lower side is visible, is formed on the driving-part step 3, where the transparent floor part 7 is formed of a through-hole group radially aligned along a radial direction, with a present location of the driver seat 15 or a peripheral position of the driver seat 15 used as an origin.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a paddy field working machine in which a see-through floor part that allows the operator to see the lower part of the machine body is provided in a driving step.

As a paddy working machine including the above-mentioned operation section steps, there is one constructed as follows.
In this paddy working machine, the step floor is composed of a main step floor having no space penetrating downward and a grid-like sub-step floor having a space penetrating downward (see Patent Document 1).

JP, 2007-228975, A

When the paddy work machine described in Patent Document 1 has a grid-like sub-step floor having a space portion through which the step floor penetrates downward, the operator of the paddy work machine can operate on the sub-step floor. Since the mud on the shoes can be dropped, it is possible to prevent the mud from being brought into the center of the machine. In addition, the operator of the paddy work machine can visually recognize the positions of the wheels through the grid-like sub-step floor, which is useful for running the paddy work machine.
However, in the configuration described in Patent Document 1, the grid-like sub-step floor is configured by crosspiece members extending in the machine longitudinal direction and crosspiece members extending in the machine lateral direction. Therefore, when the driver sitting in the driver's seat checks the direction of the front wheels through the sub-step floor, the driver's view of the driver who is looking diagonally forward is likely to be greatly obstructed by the cross member along the longitudinal direction of the aircraft. is there. For this reason, it is difficult for the driver to easily visually recognize the direction of the wheels, and there is a possibility that the driver is forced to work in an improper posture, such as leaning a large body laterally from the driver's seat and looking into it.

Further, in the configuration described in Patent Document 1, the step floor is configured by providing an opening on the left and right of the main step floor and disposing a pair of sub-step floors in the opening. For this reason, a plurality of parts are required to form the operation step, and it is necessary to assemble the paddy work machine with a pair of sub-step floors attached to the main step floor.

In view of the above situation, there is a demand for a paddy working machine that can easily visually recognize the direction and the existing position of the wheel from the operation section step that can be easily assembled.

A feature of the paddy working machine of the present invention is that it comprises a driving section step and a driving seat provided on the driving section step, and the driving section step is made of a resin body integrally formed in the lateral direction of the machine body. In the driving section step, a transparent floor is formed so that the lower side of the body can be seen, and the transparent floor extends along the radial direction with the existing position of the driving seat or a position near the driving seat as a starting point. It is composed of a group of through holes arranged in a radial pattern.

According to this configuration, the group of through-holes that form the transparent floor that allows the lower part of the fuselage to be seen is provided radially starting from the existing position of the driver's seat or a position near the driver's seat. Compared with the case where the through hole group is provided along the left-right direction, there is an advantage that the visibility by visual inspection can be further improved.
That is, the arrangement direction of the through holes formed in the transparent floor on the driver step and the direction in which the driver sits in the driver's seat and visually checks are the same or substantially the same. Therefore, in the visual direction, the range in which the driver's line of sight is blocked by a site other than the site where the through hole exists in the driving section step is relatively small, and as a result, the visual visibility is likely to be improved.
Further, the operation section step is configured by a resin body integrally formed in the left-right direction of the machine body, and the see-through floor portion is formed on the resin body. Therefore, the operation unit step does not require a member that constitutes the transparent floor part as a separate member, and can be configured as a single unit. As a result, the operation unit step can be easily assembled to the paddy work machine.

In the present invention, it is preferable that the transparent floor portion of the driver section step is provided at a position laterally outward of the driver seat in the lateral direction of the machine body.

According to this configuration, since the see-through floor is provided laterally outside the driver's seat in the left-right direction, it is easy to visually check the wheels and the like provided at the lateral outside.

In the present invention, the driving section step is located on a front side of the driving seat, a main step section located at a central portion in the longitudinal direction of the body, and a rear side including a lateral side of the driving seat. A rear step portion and a front step portion located at a front end portion of the machine body that is on the front side of the main step portion, and the main step portion has both side portions in the machine body left and right direction outside the front step portion. It is preferable that the rear step portion has a width in the lateral direction of the machine body that is substantially the same as that of the main step portion.

In paddy work machines, side steps may be separately arranged on the left and right sides of the main step body. In this case, the presence of the side steps tends to increase the width of the paddy work machine in the lateral direction of the machine body. On the other hand, like this configuration, the main step part is expanded outward in the left-right direction of the machine body, and the width of the rear step part in the left-right direction of the machine body is substantially the same as that of the main step part, so that around the driver's seat. The paddy work machine can reduce the lateral width of the machine body while ensuring the step surface. As a result, the width of the traveling machine body in the left-right direction can be made compact, the transportation cost can be reduced, and the occupied area of the storage location can be reduced.

In the present invention, the driving section step, the main step section located in the center of the vehicle front-rear direction on the front side of the driving seat, the rear step section located on the rear side including the lateral side of the driving seat, A front step portion located at the front end of the machine body on the front side of the main step portion; and any one or more of the main step portion, the rear step portion, and the front step portion. It is preferable that the transparent floor portion is provided in the step portion.

According to this configuration, by forming the transparent floor portion at a desired portion, it is possible to improve the visibility at each arbitrary step portion of the driving section step.

In the present invention, a brake pedal that switches a traveling brake to a braking state by a depression operation, a brake lever that is connected to the brake pedal and that enables an operation in a depression direction of the brake pedal from an alighting position, and the front step. A brake lever fixing portion that is oscillatably provided, the brake lever fixing portion having an engaging portion that can be engaged with and disengaged from the brake lever, and the engaging portion of the brake lever. Holds the brake lever in a state where the brake pedal is stepped on, and the front step portion has a support base portion that bulges upward, and the brake lever fixing portion is attached to the support base portion. It is preferable that it is swingably supported.

A brake lever fixing portion that holds the position of the brake lever is swingably erected on the front step portion. Therefore, the front step portion is likely to receive a load due to the swing of the brake lever fixing portion. Therefore, in this configuration, the front step portion has a support base portion that bulges upward, and the brake lever fixing portion is swingably supported by the support base portion. As a result, the front step portion is reinforced by the support base portion, so that the brake lever fixing portion can be stably supported in the operation portion step.

In the present invention, it is preferable that, in the driving section step, a plurality of grooves are formed in a grid pattern in a region on the front side of the driving seat, and a protrusion is formed in a region surrounded by the grooves. is there.

Usually, a floor mat separate from the driver's step is arranged on the driver's step in the area on the front side of the driver's seat. On the other hand, in this configuration, in the operation step, the plurality of grooves are formed in a lattice shape, and the protrusions are formed in the region surrounded by the grooves. This eliminates the need to place a floor mat on the operating step. As a result, the number of parts can be reduced, and the paddy work machine can be configured simply.

In the present invention, it is preferable that the operation section step is formed by disposing a plurality of protrusions in a dispersed manner on the step surface.

With this configuration, the driver's foot can be made less likely to slip in the driving step.

In the present invention, it is preferable that in the operation section step, a plurality of projections are continuously formed in a broken line shape on the outer edge of the step surface.

The driver's foot may slip on the driving section step, for example, in the case of rain, and there is a risk of slipping off the driving section step. However, as in this configuration, when a plurality of protrusions are continuously formed in a broken line shape on the outer edge of the step surface in the driving section step, the driver's foot located in the driving section step is Since the plurality of protrusions can be brought into contact with the outer edge of the, it is possible to prevent the problem of slipping off from the operation step.

It is a side view which shows the whole riding type rice transplanter. It is a top view which shows the whole riding type rice transplanter. It is a top view which shows the correlation of a driving|operation part step, a wheel, and another apparatus. It is a front view of a riding type rice transplanter. It is a top view showing a fertilizer application device. It is an exploded perspective view showing a driving section step. It is a principal part perspective view of a front step. It is a front sectional view showing the shape of the engine bonnet. It is a perspective view of a fuel tank. It is a perspective view which shows the blower arrange|positioned at the rear step of another embodiment. It is a perspective view which shows the rear step of another embodiment.

Hereinafter, an example of an embodiment of the present invention will be described based on the description of the drawings.
The front-rear direction, the up-down direction, and the left-right direction in the embodiment are described as follows unless otherwise specified. As shown in FIGS. 1 and 2, the traveling direction on the forward side is “F” and the traveling direction on the reverse side is “B” during the work traveling of the paddy work machine. The direction corresponding to the right side is “R”, and the direction corresponding to the left side is “L” with reference to the forward facing posture of the paddy work machine. Further, the direction corresponding to the upper side of the paddy work machine is “U”, and the direction corresponding to the lower side is “D”.

[Overall structure of paddy work machine]
FIG. 1 shows a side surface of a riding type rice transplanter, which is an example of a paddy field working machine according to the present invention, and FIG. 2 shows a plane thereof. The riding type rice transplanter is equipped with a seedling planting device 2 behind the traveling machine body 1 to perform seedling planting work.
The traveling machine body 1 includes a pair of left and right main frames 10A, 10A extending in the machine body front-rear direction as a machine body frame 10. A pair of left and right front wheels 11F, 11F and a pair of left and right rear wheels mounted on the lower portion of the machine body frame 10 are provided. The wheels 11R and 11R are configured to be self-propelled.

As shown in FIG. 1 to FIG. 3, a driving unit A including an engine 12 and a mission case 13 that output driving force to front wheels 11F and rear wheels 11R is provided at the front of the traveling vehicle body 1. On the rear side of the traveling machine body 1, a boarding type driving section C having a driving seat 15 is provided.
In the driving part C, the riding part step 3 for boarding is provided on the upper side of the body frame 10. A driver's seat 15 is provided on the driver's step 3, and the steering wheel 14 provided at the rear of the driving part A can be operated while seated on the driver's seat 15.
A spare seedling stand 16 for mounting a spare seedling across the front portion of the driving unit step 3 is provided at a lateral side portion of the traveling body 1 corresponding to the left and right sides of the driving unit A in the front portion of the driving unit C. Is erected. The fertilizer application device 4 for four rows is provided at the rear of the driver's seat 15 at the rear part of the driver's part C, and the riding type rice transplanter is configured to have a mid-mount fertilizer specification.

[Apparatus for planting seedlings]
The seedling planting device 2 is connected to a rear portion of the machine body frame 10 via a link mechanism 17 so as to be capable of moving up and down.
In the seedling planting device 2, a seedling mount 20 for four-row planting capable of mounting mat-shaped seedlings for four rows, a feed case 21 into which a driving force from the engine 12 is input via the input shaft 2a, and a vehicle body. A plurality of planting drive cases 22 arranged laterally at a predetermined interval are provided. Each of the planting drive cases 22 is provided with a seedling planting mechanism 23 on both lateral sides on the rear end side so as to be freely driven. A plurality of ground leveling floats 24 are provided in a lower portion of a planting frame (not shown) that connects the planting drive cases 22 in a state of being aligned in the lateral direction of the vehicle body.

Each seedling planting mechanism 23 drives the two planting claws 23a at a position 180 degrees in phase around the rotation axis in the left-right direction by the driving force transmitted from the feed case 21 to the planting drive case 22. It has a well-known structure. Each of the planting claws 23a is driven so that the tip of the planting claw 23a draws a long rotation path in the up-down direction, and the two planting claws 23a alternately take out the planted seedlings from the lower end of the seedling placing table 20 and prepare the soil. A seedling planting exercise for planting in the mud layer prepared by the float 24 is performed.
In this seedling planting device 2, the link mechanism 17 is vertically swung with respect to the machine frame 10 by the lifting cylinder 18, so that the leveling float 24 is in a descending work state in which it touches the mud surface of the field and the leveling float. 24 is lifted up and down to a raised non-working state in which it is lifted high away from the mud surface of the field.

[Fertilizer application]
The fertilizer application device 4 includes a fertilizer application tank 40 arranged on the back side of the driver's seat 15 for storing the granular fertilizer, a feeding section 41 (see FIG. 5) arranged below the fertilizer application tank 40, and the fed fertilizer. The fertilizer hose 42 that conveys the fertilizer to the grooving device 25 provided in the seedling planting device 2 is provided. The fertilizer application hose 42 is composed of a flexible tube made of a soft resin or the like, and is elastically deformable as the seedling planting device 2 moves up and down.

The fertilizer application device 4 is connected and fixed to the machine body frame 10 via a fertilizer application frame (not shown).

[Blower]
A blower 5 for fertilizer application is provided at a left lateral side of the fertilizer application apparatus 4 as a means for supplying wind for carrying the fertilizer delivered from the delivery section 41 of the fertilizer application apparatus 4 by the fertilizer application hose 42. ..
The blower 5 has a blower case 50 in which a blower fan (not shown) that rotates around a rotation axis in the longitudinal direction of the machine body is provided. The built-in blower fan is constituted by a turbo-type or sirocco-type centrifugal fan that sucks outside air from a direction perpendicular to the axis of rotation and discharges it in a tangential direction. An electric motor 51 that rotationally drives the blower fan is provided on the entire surface side of the blower case 50 while being positioned in front of the blower fan.
An intake duct 54 is connected via an intake section 52 to a location corresponding to the center of rotation of the blower fan on the rear side of the blower case 50. An air supply duct 53 that supplies the carrier air to the fertilizer application device 4 is connected to the outer peripheral portion of the blower case 50 along the tangential direction to the rotation locus of the blower fan.

Therefore, the gas taken in from the intake duct 54 is tangentially exhausted from the outside of the blower case 50 in the circumferential direction, and is sent to the air supply duct 53 of the fertilizer application device 4 as a carrier air. The fertilizer fed from the feeding portion 41 is mixed with the transport wind in the air supply duct 53, and is wind-powered to the fertilizer-growing device 25 through the fertilization hose 42.

As shown in FIG. 1, FIG. 3, and FIG. 5, in the blower 5, the large diameter portion 50 a of the blower case 50 that houses the blower fan is positioned above the upper surface of the rear end portion of the operation unit step 3. In the state of being turned on, it is arranged on the rear side of the driving section step 3. The intake duct 54 connected to the rear side of the blower case 50 extends below the operation unit step 3. As shown in FIG. 3, the intake duct 54 has its front end side extended to the vicinity of the driving part A, and is provided so as to take in high-temperature and dry gas heated by the waste heat of the engine 12.
Further, as shown in FIG. 3, the intake duct 54 is disposed on the inner side of the vehicle body in the left-right direction with respect to the outermost edge of the driving section step 3 in the left-right direction.

The intake duct 54 is formed in an elliptical cross-section so that the intake duct 54 has a flat shape in which the diameter in the left-right direction is wider than the diameter in the up-down direction at a position corresponding to the lower side of the operation unit step 3 from the connection position to the blower case 50. Has been done.
This is a configuration for maintaining a high vehicle height at the lower abdomen of the body while ensuring a cross-sectional area of the intake duct 54 that is equal to or larger than a predetermined value. In practice, the cross-sectional area of the oval portion is set to be slightly larger than the cross-sectional area of the circular portion in consideration of passage resistance and the like.

[Driving step]
The driving section step 3 provided in the driving section C is configured as follows.
The operation unit step 3 is made of a resin body, and is, for example, a synthetic resin material processed by injection molding. Compared to blow-molded products, injection-molded products have a higher degree of freedom in designing the shape and structure, and are easier to mold with high precision. Therefore, select a relatively free shape and structure. It is possible.

As shown in FIG. 3 and FIG. 6, the driving section step 3 includes a front step section 3A located at the front end of the machine body, a main step section 3B located at the front side of the driver's seat 15 in the center of the machine longitudinal direction, The rear step portion 3C located on the rear side including the lateral side of the seat 15 is provided.
The front step portion 3A and the main step portion 3B have upper surfaces that are substantially flush with each other, while the rear step portion 3C has an upper surface that is 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, a driver is boarded when the fertilizer is supplied to the fertilizer application tank 40, or the mat-like seedlings taken out from the preliminary seedling placing table 16 are placed on the seedling placing table 20 of the seedling planting device 2. The height is higher than the upper surfaces of the front step portion 3A and the main step portion 3B so that the driver can put his/her feet on the surface when supplying the fuel.

The front step portion 3A is provided outside the portion of the driving portion A where the engine bonnet 19 is present. In other words, a U-shaped area that is open on the rear side in plan view is formed by cutting out an area corresponding to the engine room covered with the engine bonnet 19 so that there are upper surfaces on which the front and left and right sides of the engine bonnet 19 can be boarded. The front step plate 30 has a front step portion 3A.

The main step portion 3B includes a main step plate 31 located on the front side of the position of the driver's seat 15 in the longitudinal direction of the machine body. Further, in the rear step plate 32 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.
In addition, on the left and right lateral outside positions of the main step plate 31, step-on/off steps 64 for getting on/off the driving section step 3 from the lateral side are provided.

The main step plate 31 is integrally formed in the left-right direction of the traveling machine body 1. The operation part step 3 is formed by disposing a plurality of first protrusions 33 dispersedly on the step surface 3a. Both side portions 31L and 31R of the main step portion 3B in the left-right direction of the machine body are expanded outward from the front step portion 3A.

On the outer edge of the step surface 3a of the operating section step 3, a second protrusion 34 is formed continuously in a broken line shape. The second protrusion 34 also plays a role of restricting the foot hung on the driving unit step 3 from moving laterally outward from the lateral outer edge of the driving unit step 3.

As shown in FIGS. 3 and 6, in the main step portion 3B, a plurality of groove portions 35 are formed in a grid shape in a region on the front side of the driver's seat 15, and the first protrusions are formed in a region surrounded by the groove portions 35. 33 is formed.

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 rear step plate 32.

The rear step plate 32 includes a rising plate portion 32b that constitutes the rising portion 3D, a front plate portion 32a that is located on the front side of the rising plate portion 32b, and a rear plate portion that is located on the rear side of the rising plate portion 32b. 32c, and. The rear step portion 3C and the rising portion 3D are provided on the rear side of the main step portion 3B in such a manner that the width in the lateral direction of the machine body is maintained almost unchanged from the main step portion 3B. That is, the width of the rear step portion 3C in the left-right direction of the body is substantially the same as that of the main step portion 3B.

At the center of the rear step plate 32 in the left-right direction of the machine body, a mounting opening 36 for supporting the lower surface side of the driver's seat 15 on a seat fixing portion (not shown) is provided.
The mounting opening 36 opens an upper cutout portion 36a provided in the rear plate portion 32c so as to open a range overlapping with the seat fixing portion in a plan view, and a range overlapping with the seat fixing portion in a front-back direction. As described above, the rising plate portion 32b is combined with the front notch portion 36b.

At the boundary between the front step portion 3A and the main step portion 3B, the front step plate 30 and the main step plate 31 are configured to be separable in the front-rear direction by the front-rear direction division line L1.
Further, the main step portion 3B and the rear step portion 3C are also configured to be separable in the front-rear direction by a front-rear direction division line L2 located at a position deviated from the rising portion 3D in the front-rear direction. In the present embodiment, on the front side of the rising portion 3D, the main step plate 31 and the rear step plate 32 can be divided into front and rear along the front-rear direction division line L2.

The front step plate 30 in the front step portion 3A, the main step plate 31 in the main step portion 3B, and the rear step plate 32 in the rear step portion 3C are fixed to the body frame 10 by the step fixing portion 38. ing.
As shown in FIGS. 3 and 6, a relatively large number of step fixing portions 38 are provided near the front and rear direction division lines L1 and L2 and near the outer peripheral edge.

[Transparent floor]
The driver's step 3 is provided with a see-through floor 7 that allows the user to see the lower side of the traveling machine body 1. The transparent 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 the transparent floor portions 7 is provided at a position laterally outward of the driver's seat 15 in the left-right direction of the machine body.

That is, the first perspective floor portion 71 provided in the main step portion 3B is provided at a location where the driver sitting on the driver's seat 15 can easily see the direction of the front wheels 11F and the like.
The second perspective floor portion 72 provided in the rear step portion 3C is provided at a location where a driver sitting on the driver's seat 15 can easily look back and visually recognize the direction and the like of the rear wheel 11R.
The third perspective floor portion 73 provided in the front step portion 3A is provided at a position where a driver seated in the driver's seat 15 can view the front of the body below the front step portion 3A. For example, when turning a headland with a large rice transplanter or the like, it advances to the ridge and then moves backward and then turns. At that time, the degree of approach between the wing and the ridge can be visually observed via the third perspective floor portion 73.

The transparent floor 7 is composed of a group of through holes 74 arranged radially in a 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 a position near the driver's seat 15. .. 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 seated on the driver's seat 15 sees the seated posture, but since there is some individual difference, the driver's seat 15 It does not matter as long as it exists. Further, to a certain extent, it is only necessary to be in the vicinity of the driver's seat 15 outside the area where the driver's seat 15 exists, and to be able to look into the body by tilting or standing up.

The transparent floor portion 7 is configured by a lattice-shaped member formed by a combination of a radial cross-piece member 75 along the arrangement direction of the through holes 74 arranged in a radial pattern and a cross-direction cross-piece member 76 intersecting the radial cross-piece member 75. There is.
Among these, the cross direction crosspiece members 76 provided in the main step portion 3B and the rear step portion 3C are formed substantially along the longitudinal direction of the machine body, and whether the front wheels 11F and the rear wheels 11R are oriented in the straight traveling direction or not. Also plays a role as an index of.

As described above, the transparent floor 7 is formed by the group of through holes 74 arranged radially along the radial direction starting from the center of the seat of the driver's seat 15, the existing position of the driver's seat 15, or a position near the driver's seat 15. If configured, the area of the visible area through the transparent floor 7 can be expanded as much as possible by a driver who visually checks 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. Therefore, the visibility can be improved.
Moreover, among the radial cross-piece members 75 and the cross-direction cross-piece members 76 that form the group of through-holes 74 of the transparent floor 7, the distance between the adjacent cross-direction cross-piece members 76 is the distance between the adjacent radial cross-piece members 75. Is set wider than.
Since the interval between the adjacent cross-direction cross-members 76 is set to be wide in this manner, the interval between the adjacent cross-direction cross-members 76 is smaller than the interval between the adjacent radial cross-members 75. Alternatively, as compared with the case where the sizes are set to the same degree, there is less possibility that the area of the visible area of the driver who sits on the driver's seat 15 and looks at the transparent floor 7 is narrowed. Therefore, the visibility of the driver can be further improved.

As shown in FIGS. 2, 4, and 7, at the boundary between the front step portion 3A and the main step portion 3B, the traveling brakes of the right and left front wheels 11F and the right and left rear wheels 11R are depressed. A brake pedal 80 that is switched to a braking state by is provided so as to project upward. A brake lever 81 is fixed to the brake pedal 80 so as to extend forward. The brake lever 81 enables the brake pedal 80 to be operated in the depressing direction. A driver in front of the traveling machine body 1 and at the dismounting position can operate the brake pedal 80 to the braking position and the releasing position by holding the brake lever 81. The brake lever 81 is spring-biased in a direction to bring the brake pedal 80 to the release position.

A holding lever 82 (an example of a brake lever fixing portion) is supported on the right side of the front step portion 3A so as to be swingable right and left around the front-rear axis. The holding lever 82 has an engaging portion 82a that can be engaged with and disengaged from the brake lever 81. The brake pedal 80 can be held at the braking position by depressing the brake pedal 80 to the braking position and engaging the engaging portion 82a of the holding lever 82 with the brake lever 81. The swing lever of the holding lever 82 is spring-biased toward the brake lever 81. Therefore, by tilting the brake lever 81 to the front side of the machine body, the brake lever 81 engages with the engaging portion 82a of the holding lever 82 and the brake pedal 80 is held at the braking position. To bring the brake pedal 80 to the release position, the holding lever 82 is swung in the direction in which the engagement between the brake lever 81 and the engaging portion 82a is released.

As shown in FIG. 7, the front step portion 3A has a support base portion 83 that bulges upward, and a holding lever 82 is swingably supported by the support base portion 83. As a result, the front step portion 3A is reinforced by the support base portion 83, so that the holding lever 82 can be stably supported by the operation portion step 3.

[Handrail part]
As shown in FIG. 1, a handrail portion 6 is provided on the front side of the blower 5. The handrail portion 6 is made of a metal round pipe material, and both ends thereof are connected to the side portions of the rear step plate 32.

The handrail portion 6 is formed by bending into a mountain shape having a bent portion upward in a side view of the rear step plate 32. As a result, the handrail portion 6 can be used to move in and out of the driver's seat 15 in the lateral direction of the vehicle body, move from the driver's seat 15 to the rear step portion 3C, move from the rear step portion 3C to the driver's seat 15, and the like. , So that it can be used as a handrail.

The handrail portion 6 is provided not only on one side of the machine body on the side where the blower 5 is provided, but also on the other side of the machine body on the side where the blower 5 is not provided. The handrail portion 6 is provided at a position lower than the upper end 5a of the blower 5.

As shown in FIGS. 1 and 4, an operating arm 90 is attached to the front end portion of the traveling machine body 1 in a state in which it can be rocked around an axis in the lateral direction of the machine body. The operation arm 90 is configured so that the driver can get off and hold down the lifter for traveling on a sloping ground, and can be lifted forward to hold the lift up of the front part of the aircraft from the ground. It is configured such that the swing switching operation can be freely performed in a different working posture and a storage posture (see FIG. 1) standing upright along the front part of the machine body. A center mascot 91, which serves as a sight during seedling planting work, is provided at the center of the operation arm 90 in the lateral direction of the machine body.

As shown in FIG. 8, the engine bonnet 19 has an opening 28 in the central portion of the upper surface. The upper surface of the fuel tank 29 is exposed from the opening 28. As shown in FIGS. 8 and 9, the fuel tank 29 has a supply port 29b that is closed by a cap 29a in the upper part, and a groove portion 29c that is formed in the front-rear direction of the machine body on the upper surface that surrounds the supply port 29b. The opening edge portion 19a forming the opening 28 in the engine bonnet 19 is formed by a tapered inclined surface in which the opening 28 becomes smaller toward the lower side. The opening 28 shown in FIG. 8 is, for example, rectangular. The opening 28 may have another shape such as a circular shape.

[Other Embodiment 1]
In the above embodiment, the intake duct 54 on the intake portion 52 side of the blower 5 has a structure provided rearward and outward of the rear end of the rear step portion 3C, but the present invention is not limited to this.
For example, as shown in FIG. 10, the intake duct 54 may be provided so as to penetrate the rear step portion 3C. In this case, it is effective in that the bending of the intake duct 54 and the disposition distance can be reduced to some extent.
Other configurations may be the same as those of the above-described embodiment.

[Other embodiment 2]
In the above-described embodiment, the structure having the fertilizer application device 4 at the rear of the traveling machine body 1 is illustrated, but the structure having no fertilizer application device 4 may be used.
Other configurations may be the same as those of the above-described embodiment.

[Other Embodiment 3]
In the above-described embodiment, as the operation unit step 3, a structure that can be divided in the machine longitudinal direction is exemplified, but the operation unit step 3 is not limited to this, and the operation unit step 3 having an undividable structure may be adopted. good.
Other configurations may be the same as those of the above-described embodiment.

[Fourth Embodiment]
In the above-described embodiment, the perspective 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. It is not limited to the structure.
For example, one having only the front step portion 3A, only the main step portion 3B, or only the rear step portion 3C, or only the front step portion 3A and the main step portion 3B, only the main step portion 3B and the rear step portion 3C, Alternatively, it may be provided only on the front step portion 3A and the rear step portion 3C.
Other configurations may be the same as those of the above-described embodiment.

[Fifth Embodiment]
In the above-described embodiment, in the region where the transparent floor 7 is provided, all transparent floors 7 are radially arranged along the radial direction starting from the existing position of the driver's seat 15 or a position near the driver's seat 15. Although the structure having the group of holes 74 is illustrated, the structure is not limited to this.
For example, as shown in FIG. 11, a part of the transparent floor portion 7 may be configured by a group of through holes 74 in the shape of a long hole that is long in the lateral direction of the machine body, instead of radially. In this example, the structure in which the long hole-shaped through holes 74 are provided on the left side of the rear step plate 32 of the rear step portion 3C is shown, but the same transparent floor portion 7 is also provided on the right side of the rear step plate 32. Is also good.
In particular, in the rear step portion 3C, the perspective floor 7 is considerably close to the driver's seat 15 in the machine front-rear direction. It is easy to see the situation of 11R.

Further, in the front step portion 3A, the front-rear direction positions of the transparent floor portion 7 and the driver's seat 15 are far apart. At this time, the direction of the driver's line of sight when seated in the driver's seat 15 and traveling straight ahead is almost immediately along the lateral center line CL of the traveling machine body 1. The angle formed by the center line CL and the virtual line segment connecting the position of the driver's seat 15 and the transparent floor 7 in the front step portion 3A is relatively small, and the direction of the driver's line of sight in a straight traveling state. Not too big from
Therefore, in the front step portion 3A, even if the perspective floor portion 7 is formed by a long hole-like through hole 74 group that is long in the machine longitudinal direction along the longitudinal direction of the traveling machine body 1, the head is slightly moved laterally. By doing so, the situation of the front wheel 11F can be visually recognized relatively easily.
As described above, according to the position on the operation unit step 3 where the transparent floor 7 is provided, the arrangement condition of the through holes 74 of the transparent floor 7 is not limited to the group of the radially arranged through holes 74, but the different shapes of the through holes 74. You may comprise in combination with 74 groups.
Other configurations may be the same as those of the above-described embodiment.

[Sixth Embodiment]
In the above-described embodiment, an example in which the support base portion 83 is provided in the front step portion 3A has been shown, but the front step portion 3A may be configured without the support base portion 83.

The present invention is not limited to the riding type rice transplanter equipped with the four-row planting specification seedling planting device 2 shown in the embodiment, but is a riding type rice planting machine equipped with the different seedling planting number specification planting device 2. It can be applied to various paddy working machines such as a direct seeder for sowing seeds in a field, or a chemical sprayer.

1: Traveling aircraft 3: Driving step 3A: Front step 3B: Main step 3C: Rear step 3a: Step surface 7: Perspective floor 10: Airframe frame 10A: Main frame 12: Engine 15: Driver seat 30: Front step plate 31: Main step plate 32: Rear step plate 33: First projection (projection)
34: Second protrusion (projection)
35: Groove 38: Step fixing part 71: First perspective floor part 72: Second perspective floor part 73: Third perspective floor part 74: Through hole 75: Radial beam member 76: Cross direction beam member 80: Brake pedal 81 : Brake lever 82: Holding lever (brake lever fixing part)
82a: Engagement part 83: Support base part A: Driving part C: Driving part CL: Center line L1: Front-rear direction division line L2: Front-rear direction division line

Claims (8)

A driver's seat and a driver's seat provided on the driver's step,
The operation section step is made of a resin body integrally formed in the left and right direction of the machine body,
In the operation section step, a see-through floor part that can see the lower part of the aircraft is formed,
A paddy work machine in which the transparent floor section is formed by a group of through holes radially arranged along a radial direction starting from a position where the driver seat exists or a position near the driver seat. The paddy work machine according to claim 1, wherein the transparent floor portion of the operation section step is provided at a position laterally outward of the driver's seat in the lateral direction of the machine body. The operation section step,
A main step portion located on the front side of the driver's seat in the center of the vehicle front-rear direction, a rear step portion located on the rear side including the lateral sides of the driver's seat, and a front end of the aircraft on the front side of the main step portion. A front step portion located in the section,
The main step portion is expanded outwardly from the front step portion on both sides in the left-right direction of the body,
The paddy work machine according to claim 1, wherein the rear step portion has a width in the lateral direction of the machine body that is substantially the same as that of the main step portion. The operation section step,
A main step portion located on the front side of the driver's seat in the center of the vehicle front-rear direction, a rear step portion located on the rear side including the lateral sides of the driver's seat, and a front end of the aircraft on the front side of the main step portion. A front step portion located in the section,
4. The transparent floor part is provided on any one or more step parts of the main step part, the rear step part, and the front step part. Paddy work machine described in. A brake pedal that switches the traveling brake to the braking state by depressing,
A brake lever that is connected to the brake pedal and that enables an operation in the stepping direction of the brake pedal from the exit position,
The front step portion is provided with a swingable brake lever fixing portion,
The brake lever fixing portion has an engaging portion that can be engaged with and disengaged from the brake lever, and holds the brake lever in a state where the brake pedal is depressed by engaging the engaging portion with the brake lever. Then
The paddy work machine according to claim 3 or 4, wherein the front step portion has a support base portion that bulges upward, and the brake lever fixing portion is swingably supported by the support base portion. The operation section step,
The paddy field according to any one of claims 1 to 5, wherein a plurality of groove portions are formed in a grid pattern in a region on the front side of the driver's seat, and projections are formed in a region surrounded by the groove portions. Working machine. The paddy work machine according to any one of claims 1 to 6, wherein the operating section step is formed by disposing a plurality of projecting portions in a dispersed manner on a step surface. The paddy work machine according to any one of claims 1 to 7, wherein a plurality of protrusions are continuously formed in a broken line shape on the outer edge of the step surface in the operation section step.

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