JP7178938B2 - work vehicle - Google Patents

Description

The present invention relates to work vehicles.

2. Description of the Related Art Conventionally, as a work vehicle, for example, a work vehicle disclosed in Patent Document 1 is known. The work vehicle described in Patent Document 1 includes a driver's seat ("driver's seat [16]" in the document) and traveling devices ("front wheels [4], rear wheels [5] in the document) on both sides of the driver's seat. ), and a handrail provided on the upper surface of a portion of the fender located next to the driver's seat.

JP 2018-201383 A

In the work vehicle described in Patent Literature 1, the handrail is positioned toward the rear of the driver's seat. Therefore, it is difficult for the driver to reach the handrail when getting on and off the driver's seat.

In view of the above situation, there is a demand for a work vehicle that allows the driver to easily reach the handrail when getting on and off the driver's seat.

Features of the present invention include a driver's seat, fenders that cover the traveling device on both sides of the driver's seat, handrails provided on the upper surface of portions of the fenders that are positioned laterally next to the driver's seat, The handrail is disposed forward of the rear end of the seat portion of the driver's seat, a support frame for supporting the handrail is provided inside the fender, and stays are provided in the front and rear of the support frame. The handrail has a front-rear extension portion extending along the longitudinal direction of the fuselage, and a front longitudinal extension portion bolted to the stay on the front side and extending downward from the front end portion of the front-rear extension portion. and a rear longitudinally extending portion bolted to the rear stay and extending downward from a rear end portion of the front and rear extending portion, the front end portion of the front and rear extending portion The reason is that it is located on the front side of the base of the longitudinally extending portion .

According to this characteristic configuration, the handrail is positioned closer to the front with respect to the driver's seat. This makes it easier for the driver to reach the handrail when getting on and off the driver's seat.
According to this characteristic configuration, the handrail can be firmly supported so that the fender is not deformed by an external force acting on the handrail.
Further, in the present invention, the stay has a vertical portion and a horizontal portion extending laterally inward from an upper end portion of the vertical portion, and the front longitudinally extending portion and the rear longitudinally extending portion are the longitudinally extending portion. , are preferably bolted to portions of the horizontal portion located laterally inward of the vertical portion.
Further, in the present invention, the handrail is bolted to the stay by having a bolt pass through the horizontal portion of the stay in the vertical direction and is fastened to a nut welded and fixed to the horizontal portion. It is preferable to have

Furthermore, in the present invention, it is preferable that the upper end of the handrail is positioned at a height above the lower end of the seat.

According to this characteristic configuration, the handrail is located at a relatively high height position with respect to the seat. This makes it easier for the driver to reach the handrail while seated on the driver's seat.

Further, in the present invention, a lever guide for an operation lever is provided on the upper surface of a portion of the fender positioned laterally adjacent to the driver's seat, and the front and rear range of the handrail overlaps the front and rear range of the lever guide. It is preferable that

According to this characteristic configuration, the handrail is positioned near the lever guide. This allows the driver to remove his/her hand from the operating lever and directly reach the handrail.

Furthermore, in the present invention, it is preferable that the handrail is arranged laterally outside of the lever guide.

According to this characteristic configuration, the handrail is less likely to get in the way when the driver operates the control lever.

Further, in the present invention, a fuel tank is provided below the fender, a fuel filler opening of the fuel tank is exposed to the outside through an opening formed in the upper surface of the fender, and the handrail is connected to the fuel filler. It is suitable if it is arranged on the front side of the mouth.

According to this characteristic configuration, the handrail can be positioned closer to the front of the driver's seat while preventing the handrail from becoming an obstacle when refueling.

Further, in the present invention, a fuel tank is provided below the fender, the support frame is provided along the fuel tank, and a portion of the fuel tank along the support frame is located inside the fuel tank. It is preferable that it is formed in a shape that is recessed on the side.

According to this characteristic structure, the support frame can be easily arranged in the gap between the fender and the fuel tank by inserting the support frame into the portion of the fuel tank that is recessed toward the inside of the fuel tank.

It is a left side view showing a ride-on mower. It is a top view which shows a ride-on mower. It is a left side sectional view showing a left handrail and its peripheral structure. It is a right side sectional view showing a right handrail and its peripheral structure. It is a back sectional view showing a left handrail and its peripheral structure. It is a back sectional view showing a right handrail and its peripheral structure. Fig. 10 is a left side view showing a state in which the bottom plate of the main unit-side duct is positioned at the closed position; Fig. 10 is a left side view showing a state in which the bottom plate of the main unit-side duct is positioned at the open position; It is a right side view showing a handrail concerning another embodiment.

A mode for carrying out the present invention will be described based on the drawings. In the following description, the direction of arrow F is the "front side of the fuselage" (see FIGS. 1 and 2), the direction of arrow B is the "rear side of the fuselage" (see FIGS. 1 and 2), and the direction of arrow L is the " The left side of the machine body" (see Fig. 2), and the direction of the arrow R is the right side of the machine body" (see Fig. 2).

[Overall configuration of riding lawn mower]
1 and 2 show a riding lawn mower (corresponding to the "work vehicle" according to the present invention). This riding lawn mower is equipped with a traveling body 1. - 特許庁A traveling machine body 1 is provided with a machine body frame 2 and a traveling device 3. - 特許庁The travel device 3 includes a pair of steerable left and right front wheels 3F and a pair of drivable left and right rear wheels 3B. A driving unit 4 is provided in the front part of the traveling body 1 . The driving unit 4 is provided with an engine E and a bonnet 5 that accommodates the engine E and the like. The bonnet 5 is configured to swing open and close around the front fulcrum S1.

A drive unit 6 is provided behind the motor unit 4 . Mowers 7 are provided below the traveling body 1 between the front wheels 3F and the rear wheels 3B. The mower 7 is supported by the body frame 2 via the link mechanism 8 so that it can be raised and lowered. A grass collection container 9 for collecting grass clippings from the mower 7 is supported at the rear portion of the traveling body 1 . The grass container 9 is supported by the body frame 2 via a link mechanism 10 so as to be able to move up and down and open and close. A grass collection duct 11 that guides the cut grass from the mower 7 toward the grass collection container 9 is provided across the mower 7 and the grass collection container 9 . The grass collection duct 11 includes a mower-side duct 12 provided on the mower 7 and a machine-side duct 13 provided on the body frame 2 .

[Driver]
The operating unit 6 includes a driver's seat 14, a control tower 15, a fender 16, a duct lever 17 (corresponding to the "control lever" according to the present invention), and a work lever 18 (corresponding to the "control lever" according to the present invention). equivalent) and are provided. The driver's seat 14 includes a seat portion 14A, a backrest portion 14B, and left and right armrests 14C. A fuel tank 19 (see FIG. 4) is provided below the rear portion of the fender 16 . The control tower 15 is provided with a steering handle 20, a meter panel 21, a key switch 22 for instructing the start of the engine E, and a panel 23 for covering a column (not shown) supporting the steering handle 20 and the like. there is

The duct lever 17 is a lever for opening and closing the bottom plate 39 of the main unit side duct 13 . The duct lever 17 is arranged on the right side of the driver's seat 14 . The duct lever 17 is configured to be swingable back and forth.

The work lever 18 is a lever for raising and lowering the mower 7 , raising and lowering the grass container 9 , and opening and closing the grass container 9 . The work lever 18 is arranged on the left side of the driver's seat 14 . The work lever 18 is configured to be swingable in the front, rear, left, and right directions.

The fender 16 includes a left fender portion 16L covering the left rear wheel 3B and a right fender portion 16R covering the right rear wheel 3B. The left fender portion 16L and the right fender portion 16R are formed integrally with a step portion that constitutes the floor portion of the driving portion 6. As shown in FIG. A left handrail 24 and a left lever guide 25 are provided on the upper surface of a portion of the fender 16 located to the left of the driver's seat 14 (left fender portion 16L). Left lever guide 25 is a left lever guide for working lever 18 .

A right handrail 24 and a right lever guide 26 are provided on the upper surface of a portion of the fender 16 located to the right of the driver's seat 14 (right fender portion 16R). A right lever guide 26 is a lever guide for the duct lever 17 . A filler port 19a of the fuel tank 19 is exposed to the outside through an opening 16a (see FIG. 4) formed in the upper surface of the right fender portion 16R.

〔handrail〕
As shown in FIGS. 3 to 6, the handrail 24 has a front-rear extension portion 24A extending along the longitudinal direction of the fuselage and a front longitudinal extension portion 24B extending downward from the front end portion of the front-rear extension portion 24A. , and a rear longitudinal extension portion 24C extending downward from the rear end portion of the front and rear extension portion 24A. The handrail 24 is arranged forward of the rear end P1 of the seat portion 14A. In other words, the handrail 24 is arranged so as not to protrude rearward from the rear end P1 of the seat portion 14A. The upper end P2 of the handrail 24 (the upper end of the front-rear extending portion 24A) is positioned above the lower end P3 of the seat portion 14A and below the upper end P4 of the seat portion 14A.

As shown in FIGS. 3 and 5 , the left handrail 24 is arranged laterally outside (to the left) of the left lever guide 25 . The front-rear range of the left handrail 24 overlaps the front-rear range of the left lever guide 25 . Specifically, the left handrail 24 is within the front and rear range of the left lever guide 25 . A base portion of the rear longitudinally extending portion 24C of the left handrail 24 is inserted into the left lever guide 25 through an opening formed in the left side of the left lever guide 25. As shown in FIG.

A left support frame 27L that supports the left handrail 24 and the like is provided inside the left fender portion 16L. Stays 28 to which the left handrail 24 is bolted are provided in the front and rear of the left support frame 27L. The left handrail 24 is bolted to the front and rear stays 28 while being placed on the upper surface of the left fender portion 16L. A plate-shaped stay 29 that supports the work lever 18 and the like is provided on the left support frame 27L. The lower end of the stay 28 on the front side is in contact with the upper surface 29 a of the stay 29 .

A bolt (front bolt) 30 corresponding to the front stay 28 is inserted from above into the base of the front longitudinally extending portion 24B. The front bolt 30 passes vertically through the base of the front longitudinally extending portion 24B, the upper surface of the left fender portion 16L, and the horizontal portion of the front stay 28, and is welded and fixed to the horizontal portion of the front stay 28. It is fastened to the nut 31 which is connected.

A bolt (rear bolt) 30 corresponding to the rear stay 28 is inserted from above into the base of the rear longitudinally extending portion 24C. The rear bolt 30 vertically penetrates the base of the rear longitudinally extending portion 24C, the upper surface of the left fender portion 16L, and the horizontal portion of the rear stay 28, and extends through the horizontal portion of the rear stay 28. It is fastened to a nut 31 welded and fixed to.

As shown in FIGS. 4 and 6 , the right handrail 24 is arranged laterally outside (to the right) of the right lever guide 26 . The front-rear range of the right handrail 24 overlaps the front-rear range of the right lever guide 26 . Specifically, the fore-and-aft range of the front portion of the right handrail 24 overlaps the fore-and-aft range of the rear portion of the right lever guide 26 . The right handrail 24 is arranged in front of the filler port 19 a of the fuel tank 19 .

A right support frame 27R that supports the right handrail 24 and the like is provided inside the right fender portion 16R. The right support frame 27R is provided along the fuel tank 19. As shown in FIG. A portion of the fuel tank 19 along the right support frame 27</b>R is formed into a recessed shape inside the fuel tank 19 . Stays 32 to which the right handrail 24 is bolted are provided in the front and rear of the right support frame 27R. The right handrail 24 is bolted to the front and rear stays 32 while being placed on the upper surface of the right fender portion 16R.

A bolt (front bolt) 33 corresponding to the front stay 32 is inserted from above into the base of the front longitudinally extending portion 24B. The front bolt 33 passes vertically through the base of the front longitudinally extending portion 24B, the upper surface of the right fender portion 16R, and the horizontal portion of the front stay 32, and is welded and fixed to the horizontal portion of the front stay 32. nut 34 is fastened.

A bolt (rear bolt) 33 corresponding to the rear stay 32 is inserted from above into the base of the rear longitudinally extending portion 24C. The rear bolt 33 vertically penetrates the base of the rear vertically extending portion 24C, the upper surface of the right fender portion 16R, and the horizontal portion of the rear stay 32, and extends through the horizontal portion of the rear stay 32. is fastened to a nut 34 which is welded and fixed to the .

[Cover for relay]
As shown in FIGS. 3 and 5, an electrical system relay 35 is provided inside the left fender portion 16L. A cover 36 is provided to cover the relay 35 in order to protect the relay 35 from muddy water or the like from the left rear wheel 3B. Relay 35 is attached to cover 36 . The cover 36 is a box-shaped member that opens forward and upward. The cover 36 includes a bottom plate 36A, left and right side plates 36B, and a rear plate 36C. A cover 36 is bolted to a stay 37 for reinforcing the stay 29 . A bolt 38 for fixing the cover 36 is inserted from the left side into the left side plate 36B. The cover 36 can be attached and detached together with the relay 35 from the left side of the machine body.

[Opening and closing structure of the bottom plate of the main unit side duct]
As shown in FIGS. 7 and 8, the main unit side duct 13 is provided with a bottom plate 39 for opening and closing the bottom opening 13a. The bottom plate 39 is configured to be swingable around the swing axis X1 between a closed position (see FIG. 7) that closes the bottom opening 13a and an open position (see FIG. 8) that opens the bottom opening 13a. The swing axis X1 is a swing axis extending along the left-right direction of the machine body. The bottom plate 39 is supported by the left and right support plates 41 via a support shaft 40 so as to be rockable about the rocking axis X1.

The duct lever 17 is configured to be swingable around the swing axis X2. The swing axis X2 is a swing axis extending along the left-right direction of the machine body. The duct lever 17 is provided with a rod portion 17a extending along the swing axis X2.

A link 42 that interlocks the duct lever 17 and the bottom plate 39 is provided. The link 42 is provided along the left side surface of the main unit side duct 13 . An arm 17b to which one end of the link 42 is connected is provided on the rod portion 17a. One end of the link 42 and the arm 17 b are connected via a pin 44 . The support shaft 40 is provided with an arm 40a to which the other end of the link 42 is connected. The arm 40 a and the other end of the link 42 are connected via a pin 45 .

A spring 43 is provided to urge the bottom plate 39 to swing around the swing axis X1. The spring 43 swings the bottom plate 39 about the swing axis X1 toward the closed position side (hereinafter referred to as "closed position side swing biasing state"; see FIG. 7). It is configured to be switchable between a state in which it is swing-biased toward the open position side about the center X1 (hereinafter referred to as an "open-position side swing bias state"; see FIG. 8). That is, the spring 43 is configured to be switchable between the closed-position-side swing-biased state and the open-position-side swing-biased state by passing over the fulcrum (the swing axis X1). A spring 43 is provided across the left support plate 41 and the pin 45 .

As shown in FIG. 7, when the bottom plate 39 is positioned at the closed position, the spring 43 is in the closed position swing biasing state. In this case, the spring 43 is positioned above the swing axis X1.

As shown in FIG. 8, when the duct lever 17 is swung to the open position, the bottom plate 39 opens about the swing axis X1 through the link 42 so as to interlock with the swing of the duct lever 17. It will swing to position. Accordingly, the spring 43 is positioned below the swing axis X1. As a result, the spring 43 is brought into the swing biased state on the open position side.

[Another embodiment]
(1) As shown in FIG. 9, a handrail 124 can be used in place of the handrail 24 . FIG. 9 shows an example in which a handrail 124 is used instead of the handrail 24 on the right side. The handrail 124 is formed with a portion 124a shaped along the curved shape of the upper surface of the right fender portion 16R. A handrail 124 can be used instead of the handrail 24 on the left side.

(2) In the above embodiment, the "running device" according to the present invention is the wheel-type running device 3 . However, the "travel device" according to the present invention may be a crawler type travel device.

(3) In the above embodiment, the upper end P2 of the handrail 24 is positioned above the lower end P3 of the seat portion 14A and below the upper end P4 of the seat portion 14A. However, the upper end P2 of the handrail 24 may be positioned above the upper end P4 of the seat portion 14A and below the lower end of the armrest 14C. Alternatively, the upper end P2 of the handrail 24 may be located at a lower height position than the lower end P3 of the seat portion 14A.

(4) In the above embodiment, the front-rear range of the left handrail 24 overlaps the front-rear range of the left lever guide 25 . However, the front-rear range of the left handrail 24 does not have to overlap the front-rear range of the left lever guide 25 .

(5) In the above embodiment, the front-rear range of the right handrail 24 overlaps the front-rear range of the right lever guide 26 . However, the front-rear range of the right handrail 24 does not have to overlap the front-rear range of the right lever guide 26 .

(6) In the above embodiment, the left handrail 24 is arranged laterally outside (left side) of the left lever guide 25 . However, the left handrail 24 may be arranged laterally inward (to the right) of the left lever guide 25 .

(7) In the above embodiment, the right handrail 24 is arranged laterally outside (to the right) of the right lever guide 26 . However, the right handrail 24 may be arranged laterally inward (left side) of the right lever guide 26 .

(8) In the above embodiment, the right handrail 24 is positioned forward of the filler port 19 a of the fuel tank 19 . However, the right handrail 24 may be arranged behind the filler port 19 a of the fuel tank 19 .

(9) In the above embodiment, the left support frame 27L is provided inside the left fender portion 16L. However, the left support frame 27L may be provided outside the left fender portion 16L.

(10) In the above embodiment, the right support frame 27R is provided inside the right fender portion 16R. However, a right support frame 27R may be provided outside the right fender portion 16R.

(11) In the above embodiment, the portion of the fuel tank 19 that extends along the right support frame 27R is recessed into the fuel tank 19 . However, the portion of the fuel tank 19 along the right support frame 27</b>R does not have to be recessed into the fuel tank 19 .

(12) It should be noted that the present invention is not limited to the above-described embodiment and the above-described another embodiment, and various other modifications are possible.

INDUSTRIAL APPLICABILITY The present invention can be applied not only to riding mowers but also to tractors having a working device at the rear of the machine body.

3 travel device 14 driver's seat 14A seat portion 16 fender 16a opening 17 duct lever (operation lever)
18 work lever (operating lever)
19 fuel tank 19a fuel filler port 24 handrail
24A front and rear extension
24B front vertical extension
24C rear vertical extension
25 Left lever guide 26 Right lever guide 27L Left support frame 27R Right support frame 28 Stay 30 Bolt 31 Nut 32 Stay 33 Bolt 34 Nut 124 Handrail P1 Rear end of seat P2 Upper end of handrail P3 Lower end of seat

Claims (8)

a driver's seat;
fenders that cover the traveling device on both sides of the driver's seat;
a handrail provided on an upper surface portion of a portion of the fender located laterally adjacent to the driver's seat,
The handrail is arranged on the front side of the rear end of the seat portion of the driver's seat,
A support frame for supporting the handrail is provided inside the fender,
The support frame is provided with stays in the front and rear,
The handrail includes a front-rear extending portion extending along the longitudinal direction of the fuselage, a front longitudinally-extending portion bolted to the stay on the front side and extending downward from a front end portion of the front-rear extending portion, and a rear-side extending portion. a rear longitudinal extension portion bolted to the stay and extending downward from a rear end portion of the front and rear extension portion;
The working vehicle , wherein a front end portion of the front-rear extension portion is positioned forward of a base portion of the front longitudinal extension portion . The stay has a vertical portion and a horizontal portion extending laterally inward from an upper end of the vertical portion,
The work vehicle according to claim 1, wherein the front longitudinally extending portion and the rear longitudinally extending portion are bolted to portions of the horizontal portion located laterally inward of the vertical portion. 3. The handrail is bolted to the stay by a bolt vertically passing through the horizontal portion of the stay and fastened to a nut welded to the horizontal portion. Work vehicle described in . The work vehicle according to any one of claims 1 to 3 , wherein the upper end of the handrail is located at a height position above the lower end of the seat portion. A lever guide for an operation lever is provided on the upper surface of a portion of the fender located next to the driver's seat,
The working vehicle according to any one of claims 1 to 4 , wherein the front-rear range of the handrail overlaps the front-rear range of the lever guide. The work vehicle according to claim 5 , wherein the handrail is arranged laterally outside of the lever guide. A fuel tank is provided below the fender,
The fuel filler port of the fuel tank is exposed to the outside through an opening formed in the upper surface of the fender,
The work vehicle according to any one of claims 1 to 6 , wherein the handrail is arranged on the front side of the fuel filler port. A fuel tank is provided below the fender,
The support frame is provided along the fuel tank,
The work vehicle according to any one of claims 1 to 7 , wherein a portion of the fuel tank that extends along the support frame is formed in a shape that is recessed toward the inside of the fuel tank.

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