JP3294176B2 - Riding work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear cover in which a pair of left and right rear wheel fenders covering the upper portions of left and right rear wheels, a plate-shaped seat support portion extending over the rear wheel fenders, and an operation step are integrally formed. And a riding type working machine such as a rice transplanter, which is attached to a body frame so as to be freely opened and closed.

[0002]

2. Description of the Related Art In a riding type rice transplanter, which is an example of a conventional riding type working machine, in order to attach a rear cover to a body frame, both front and rear ends of the rear cover and portions near the rear cover are connected to the body frame.

[0003]

However, according to the above-mentioned conventional technique, if the rear cover made of synthetic resin or sheet metal is made thinner for weight reduction and cost reduction, when the pedal is operated, the rear cover becomes thinner. The reaction force causes an external force to act on the seat support via the driver's seat, thereby causing the rear cover to bend or flex, resulting in an unstable position of the driver's seat. In particular, in a riding type rice transplanter in which a seedling planting device is connected to the rear part of a riding type self-propelled vehicle equipped with a rear cover, it is possible to look back while sitting down and supply seedlings to the seedling planting device. Then, an external force acts on the seat support portion via the driver seat, and the position of the driver seat becomes unstable.

[0004] In short, conventionally, the driver's seat becomes unstable, so that the weight and cost of the rear cover cannot be sufficiently reduced.

An object of the present invention is to stabilize a driver's seat while reducing the weight and cost of a rear cover.

[0006]

The features, functions and effects of the first aspect of the present invention are as follows.

[Features] A rear cover integrally formed with a pair of right and left rear wheel fender portions covering the upper portions of the left and right rear wheels, a plate-shaped seat support portion extending over the rear wheel fender portions, and an operation step portion is opened and closed on the body frame. A riding type work machine that is freely attached,
Seat mounting bracket for mounting a seat on the seat support
The seat mounting bracket has a different diameter hole
And attach the shaft to the body frame,
At the upper end, insert the rear cover into the closed position from the open state.
To the insertion posture and the axis of the shaft part
Swing around to the seat mounting bracket
Equipped with an engagement part that can be switched to the engagement position to engage
The front cover with the rear cover in the closed position.
A connection tool for engaging the engagement portion with the seat mounting bracket from above and connecting the seat support portion to the body frame is provided.

[Operation] According to the first aspect , the rear cover is connected to the seat support.
Seat mounting bracket having a different diameter hole through which
Fix the racket and switch the engaging part to the insertion position
Allows the rear cover to be opened and closed, while the rear cover
Switch the engagement part to the engagement posture in the closed posture
Seat support to prevent the rear cover from opening
Part can be connected to the body frame, so the seat
Connect / disconnect the support to / from the body frame at the rear
Rotate the engaging part from above with the cover in the closed position
You only need to perform one operation. And , since the seat support is connected to the body frame with the connecting tool in a state where the rear cover is in the closed position, even if an external force of the seat support acts via the driver's seat at the time of pedal operation or seedling supply. It can prevent the rear cover from bending and bending ,
The driver's seat can be maintained stably.

[Effect] Therefore, according to the first aspect of the present invention, the body frame of the seat support portion is provided.
Can be connected and disconnected with good operability.
The opening and closing of the unit cover can now be performed with good workability. Soshi
As a result, the driver's seat can be stabilized while the rear cover is made thinner to reduce the weight and cost of the rear cover.

According to the second aspect of the present invention, the features, actions,
The effects are as follows.

[Features] In the features of the first aspect of the present invention, the rear cover is horizontally oriented.
On the body frame to open and close by swinging around the axis
With the rear cover in the mounted and closed position
Swing to the grip of the control lever attached to the aircraft frame
To the first open position and the upper position beyond the grip
Opening support for supporting the rear cover in the moved second open position
The point is that a holding means is provided .

[Operation] According to the second aspect of the present invention , the rear cover is supported by the opening support means.
Select the bar between the first open position and the second open position and support it
So that the rear cover is open and the rear
When performing maintenance on the lower part of the cover,
If you only need to open the bar slightly,
By supporting the bar in the first open position, the desired
Opening the rear cover while ensuring reliable maintenance
No need to remove the handle of the control lever from the control lever
To open the rear cover with good workability.
If it is necessary to open the
2nd rear cover by removing the grip that was in the way
By opening to the open position and supporting it,
Maintenance can be performed with good workability.

[Effect] Therefore, according to the second aspect of the invention, the rear cover is opened.
Open the rear cover according to the type of maintenance
Especially when it is not necessary to open the rear cover widely.
Maintenance and open / close the rear cover with good workability.
I got it.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a riding type rice transplanter, which is an example of a riding type working machine, includes a seedling planting device 2 at a rear portion of a riding type self-propelled body 1, a link mechanism 3 and a hydraulic cylinder. 4 so as to be able to move up and down freely.

The self-propelled body 1 is configured by mounting a driving unit 8 and a boarding operation unit 9 on a body frame 7 having a pair of left and right driving front wheels 5 for steering and a pair of left and right driving rear wheels 6. ing. The front drive wheel 5 is supported by the body frame 7 via a planting / running transmission case 10, and the rear drive wheel 6 is supported by the body frame 7 via an axle case 11.

The body frame 7 is provided with a pair of left and right central main frame members 12 and a pair of left and right side frame members 13 as shown in FIGS. A front frame member 14 for connecting the front end portions of the main frame member 12 to each other is provided, and a rear end portion of the side frame member 13 is bent and fixed to the rear end of the main frame member 12. The seat support frame portion 12a at the rear of the main frame member 12 is formed in a trapezoidal shape projecting upward.
The front portions of the upper ends 2a are connected by a reinforcing frame member 12A.

As shown in FIG. 8, the boarding driving section 9 includes a pair of left and right rear wheel fender portions 15A covering the upper portions of the left and right driving rear wheels 6, and a plate-shaped seat support portion extending over these rear wheel fender portions 15A. A rear cover 15 integrally formed of a synthetic resin material and a driving step portion 15B is attached to the body frame 7 via a pair of left and right hinges H so as to be able to swing open and close around a right-left axis P1 at the rear end. A driver seat 16 is attached to the support portion 15B, a steering wheel 17 is installed in a state of vertically penetrating the hood 8A of the driving portion 8, and a handle portion 18A for operating the control valve 4A for the hydraulic cylinder 4 is provided. With the lifting lever 18 positioned on the side of the driver's seat 16 and penetrating the rear cover 15 in the up-down direction, it is attached to the body frame 7 and It is constructed by arranging a pair of right and left steering clutch brake pedal 19 in one lateral side of the driving unit 8. As shown in FIGS. 5 and 6 (a) and (b), the means for attaching the driver's seat 16 to the seat support 15B includes a plate-like seat mounting bracket 24 on the seat support 15B. In the closed posture, the bracket 27 fixed to the driver's seat 16 is fixedly fastened to the driver's seat 16 with a backing plate 25 and a bolt / nut 26 mounted on the reinforcing frame member 12A. A means for attaching via a pin 28 so as to be swingable and openable and closable around a horizontal axis P2. A plurality of pin holes 29 are formed in the bracket 27 at intervals in the front-rear direction.
By selecting the pin hole 29, the front / rear position of the driver's seat 16 can be adjusted. Reference numeral 30 denotes a cushion rubber for placing and supporting the rear portion of the driver's seat 16 in the closed position on the seat support 15B, and a portion of the seat support 15B where the cushion rubber 30 is provided is provided between the left and right main frames 12. And is supported by a second reinforcing frame member 12 </ b> B erected over the same. The grip portion 18A of the lifting lever 18 is screwed into the lever body 18B, and the shift lever operation guide groove 21 of the rear cover 15 is formed to have a smaller width than the grip portion 18A.

The means for fixing the rear cover 15 in the closed position is, as shown in FIGS.
When the hook 5 is in the closed position, the hook 22 fixed to the lower surface of the driving step 15C is detachably engaged with the hook 22 and the hook 22 is pulled downward in the locked state, thereby fixing the driving step 15C to the body frame 7. A pair of buckles 23 are attached to the body frame 7 and the rear cover 15
Is provided with a connecting member 31 for connecting the seat supporting portion 15B to the reinforcing frame member 12A in a state in which the seat supporting portion 15B is in the closed posture.

As shown in FIGS. 5 to 8, the connecting member 31 has a shaft portion 33 mounted on the reinforcing frame member 12A.
At the upper end of the part 33, the seat
Insert into the oblong different diameter hole 32 formed in the mounting bracket 24
Insertion posture and the shaking around the shaft axis X integrated with the shaft portion 33.
Opening and closing direction of the rear cover 15 around the different-diameter hole 32 by movement
(Below the upper surface of the seat mounting bracket and the following engaging portion 34
Surface) , that is, the closed position of the rear cover 15
The rear cover 15 is engaged with the periphery of the
An engagement portion 34 that is operable to be switched to an engagement posture for preventing the opening is fixed. The means for attaching the shaft portion 33 includes a cylinder 35 for inserting the shaft portion 33 and holding the posture.
Is fixed to the reinforcing frame member 12A, and a nut 36 is screwed into the lower end of the shaft portion 33, and the cylinder 35 is sandwiched between the nut 36 and the engaging portion 34 from the shaft center direction. Means that is rotatable around the axis X of the shaft portion and is rotatable between the engaging portion 34 and the cylinder 35 while allowing the rotation of the engaging portion 34 artificially. The rotation of the portion 34 is prevented by frictional force, that is, the engagement portion 3
A disc spring S that frictionally holds the rotation posture of No. 4 is interposed. Reference numeral 37 denotes a lock nut for preventing the nut 36 from rotating. As shown in FIG. 9, the engaging portion 34 is formed by bending a metal plate into a U-shape, and is fixed to an upper end portion of the shaft portion 33 by welding. A notch 34a is formed for performing a welding operation for increasing the welding margin and improving the fixing strength to the shaft portion 33.

Therefore, by switching the engagement portion 34 to the engagement position while the rear cover 15 is in the closed position, the seedling can be turned around when operating the pedals or sitting on the driver's seat 16 and looking back. When the rear cover 15 is bent or bent by an external force acting on the seat support portion 15B via the driver's seat 16 at the time of supplying seedlings to the planting device 2 or the like, the seat support portion 15B rises from the reinforcing frame member 12A due to bending or bending. The lateral movement with respect to the reinforcing frame 12A is performed by the engagement portion 34 and the shaft portion 3.
Thus, the driver's seat 16 can be stably maintained by being prevented by engagement with the third seat mounting bracket 24. Then, by switching the engagement portion 34 to the insertion position, the engagement of the engagement portion 34 around the different diameter hole 32 is released, so that the different diameter hole 32 can be separated from the shaft portion 33. With rear cover 15
Can be tolerated. The rotating operation of the engaging portion 34 is such that the engaging portion 34 is disposed immediately below the driver's seat 16 in the closed position, but the driver's seat 16 is opened to expose the engaging portion 34 to the outside. It is possible to do it.

As shown in FIG. 3, the opening support means for supporting the rear cover 15 in the open position includes a first opening mechanism in which the rear cover 15 is swung until it comes into contact with the grip portion 18A of the elevating lever 18 or immediately before it hits it. A means for supporting the rear cover 15 in a posture and a second open posture in which the grip portion 18A is removed and the grip portion 18A is swung to an upper position beyond the grip portion 18A. A locking rod 38 having a locking hole 38 formed at the lower end thereof and a bending locking portion 39a lockable to the locking hole 38 formed at the lower end is swingably attached to the rear cover 15, and the bending locking portion 3 is formed.
9a is locked in the lower locking hole 38 to support the rear cover 15 in the first open position against the weight thereof with the rod 39, and the bent locking portion 39a is fixed to the upper locking hole 38. The locking means is a means for supporting the rear cover 15 in the second open position with the tension rod 39 against the weight thereof. As shown in FIG. 10, the strut bar 39 is elastically locked by a locking member 40 attached to the rear cover 15 so as to be held in the storage position stored in the lower surface of the rear cover 15. .

Accordingly, the buckle 23 is removed, and the engaging portion 24
Is switched to the insertion position, and then the rear cover 15 is swung upward to bend the locking portion 39a of the strut rod 39.
The rear cover 15 can be opened to the first open position and supported by locking the buckle 2 into the first locking position.
3 is removed, the engaging portion 24 is switched to the insertion position, the grip portion 18A of the elevating lever 18 is removed, and then the rear cover 1 is removed.
5 is rocked upward to lock the bent locking portion 39a in the upper locking hole 38 so that the rear cover 15 is
It can be opened and supported in an open position.

As shown in FIGS. 11 and 12, (a) and (b) in FIG. 11, the drive front wheel 5 includes a hub 42 for attachment to an axle 41 and a rim member 43 made of a pipe.
4 and a tire 47 with a rubber lug 46 fixed to the wheel body 45. The outer periphery of the tire 4
A wheel cap 49 made of a synthetic resin, which is attached to the axle 41 via a center bolt 48 together with the drive front wheel 5 in a state of contacting the side surface of the wheel 7 is arranged. That is,
The wheel cap 49 prevents the mud mass lifted by the spokes 44 from dropping into the planted land outside the driving front wheel 5. The wheel cap 49
As shown in FIG. 12 (A), the center part of the tire 47, which is fixed to the axle 41 with the center bolt 48 when the outer peripheral edge is applied to the side surface of the tire 47, is the axle 41,
The hub 42 is separated from the end face of the hub 42 and is elastically deformed by being fixed to the axle 41 by a center bolt 48 as shown in FIG. In other words, the outer peripheral edge is pressed against the side surface of the tire 47 by its elasticity in a state of being attached to the axle 41. Further, near the outer peripheral edge of the wheel cap 49, a tapered space 5 which is in contact with the side surface of the tire 47 and is formed by the outer peripheral portion and the outer peripheral portion of the side surface of the tire 47.
By closing the opening toward the center of the wheel 0, stones or the like enter the space 50 and bite into the tapered portion, thereby forming a gap between the outer peripheral edge of the wheel cap 49 and the side surface of the tire 47. Prevent annular ribs 49
a is formed by integral molding. A mounting seat for connecting with a U-shaped mounting bracket 51 and a bolt 52 is provided on the inner surface of the wheel cap 49 so as to increase the mounting strength of the wheel cap 49 by connecting the spoke 44 to the wheel cap 49 in a state of turning around. 53 are integrally formed. Further, on the outer surface of the wheel cap 49, a sticking portion 55 for sticking the nameplate, the seal 54, etc. without protruding outwardly is formed in a concave shape.

A pair of left and right front steps 56 for forming a passage for getting on and off from the front to the boarding operation unit 9 are arranged on both left and right sides of the driving unit 8.
6 is provided with a stand 57 for spare seedlings on which spare seedlings are mounted in a plurality of upper and lower stages. Adjacent markers 58 are displayed on a pair of front and rear struts 57A of the spare seedling rack 57 so as to indicate to the driver the left and right positions of the body with respect to the already planted seedlings in relation to the already planted seedlings. The adjacent marker 5
As shown in FIGS. 13A and 13B, the mounting means 8 fixes the bracket 59 to each of the columns 57A.
The base 59 of the adjacent marker 58 is swingably movable back and forth around the vertical axis and is fixed to a first posture projecting diagonally forward and outward and a second posture projecting diagonally rearward and outward.
Is provided with a bolt 60 and a nut 61, which are fixed to the adjacent marker 58 in each posture by a frictional force in a state in which a manual operation is permitted. That is,
Select the bracket 59 for attaching the adjacent marker 58,
By selecting the mounting posture of the adjacent marker 59, the front / rear position of the front end portion of the adjacent marker 58 that is arranged directly above the planted seedling can be selected according to the driver's preference. The bracket 59 has a U-shape having a pair of upper and lower mounting pieces 59A sandwiching the adjacent marker 58 from above and below, and each of the mounting pieces 59A has a first posture and a second posture of the adjacent marker 58. A pair of cutouts 59a and 59b are formed as indices for determining the direction of projection in the above. The bracket 59 attached to the front pillar 57A of the pillar 57A and the bracket 59 attached to the rear pillar 57A are upside down,
The notch 59a serving as an index in the first position in the front bracket 59 is an index in the second position in the rear bracket 59, while the notch 59a is an index in the second position in the front bracket 59. Cutout 5
9b serves as an index in the first posture in the rear bracket 59.

[Alternative Embodiment] In the above embodiment, the rear cover 15 is opened and closed by swinging. However, the rear cover 15 may be opened and closed by attachment and detachment.

In the above-described embodiment, the connecting member 31 is provided on the body frame 7 side, but may be provided on the driver seat 16 side. In this case, the different diameter holes 32 are formed on the body frame 7 side.

In the above embodiment, the connecting tool 31 is
Although a so-called one-touch type that switches between a connected state and a disconnected state by rotating is shown, the connecting tool 31 may be a bolt and a nut.

In the above embodiment, the lifting lever is shown as the operating lever 18, but the operating lever 18 may be a speed change lever.

In the above embodiment, an example of application to a riding type rice transplanter has been described. However, the present invention can be applied to various riding type working machines.

In the above embodiment, the rear cover 15 is made of a synthetic resin. However, the rear cover 15 may be made of a sheet metal.

The structure and shape of the body frame 7 can be changed as appropriate.

The structure and shape of the rear cover 15 can be changed as appropriate.

In the above embodiment, one posture is shown as the second opening posture, but the second opening posture may be a plurality of postures having different opening amounts.

The structure for attaching the driver's seat 16 to the seat support 15B can be changed as appropriate.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter.

FIG. 2 is a cutaway side view of the driving unit.

FIG. 3 is a side view of the driving unit with a rear cover opened.

FIG. 4 is a rear view of the body frame.

FIG. 5 is a cutaway side view of a seat mounting portion.

FIG. 6 is a cutaway front view of the seat connection state and the connection release state.

FIG. 7 is a plan view of a seat mounting bracket.

FIG. 8 is a perspective view of a rear cover.

FIG. 9 is a front view and an exploded perspective view of a coupler.

FIG. 10 is a perspective view of a strut bar.

FIG. 11 is a side view of a front wheel.

FIG. 12 is a cross-sectional view showing how to attach a wheel cap.

FIG. 13 is a plan view of an adjacent marker attaching portion and a perspective view of a main portion.

[Explanation of symbols]

 Reference Signs List 6 rear wheel 7 fuselage frame 15 rear cover 15A rear wheel fender portion 15B seat support portion 15C driving step portion 18 operation lever 18A grip portion 31 coupling tool 32 different diameter hole 33 shaft portion 34 engagement portion P1 lateral shaft center

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B62D 25/20 A01C 11/02 311 B62D 25/10 B62D 25/12

Claims (2)

(57) [Claims] 1. A pair of left and right rear wheel fender portions (15A) covering the upper portions of left and right rear wheels (6) and (6), and a plate-like seat support portion (15) extending over the rear wheel fender portions (15A).
B) is a riding type working machine in which a rear cover (15) integrally formed with an operation step portion (15C) is attached to a body frame (7), and is provided on the seat support portion (15A).
Seat mounting bracket (2)
4) and fix the seat mounting bracket (24).
Hole (32) formed at the position directly under the seat (16)
And the shaft (33) is mounted on the body frame (7).
At the upper end of the shaft (33), a rear cover
(15) The operation from the open state to the closed position is performed by using the different-diameter hole.
(32) Insertion posture and around the axis of shaft (33)
The seat mounting bracket (24)
Part that can be operated to switch between the engaging position and the engaging position
(34), and the rear cover (15) is
In the closed position, the engaging portion (34) is seated from above.
A connector (3 ) that engages with the seat mounting bracket (24 ) to connect the seat support (15B) to the body frame (7).
A riding type working machine provided with 1). 2. The rear cover (15) is provided with a lateral shaft center circumference.
Frame so that it can be opened and closed by rocking.
Through the rear cover (15) in the closed position
Operation lever (1) attached to the body frame (7) in the state
8) The first open posture in which the grip portion (18A) is swung to
The second swinging to the upper position beyond the grip (18A)
Open support to support the rear cover (15) in two open positions
2. The riding type working machine according to claim 1, further comprising means .