Riding mower

The present invention includes a traveling rear wheel that can be driven forward and reverse separately for each of the left and right sides, and a pair of left and right front wheels that can be steered, and a driver's seat is provided at a front-rear distance between the rear wheel and the front wheel. It relates to a riding type mower equipped with a gate-shaped fall protection frame in which the lower end side is fixed at the left and right positions on the rear side.

As described above, a passenger-type mower equipped with a traveling rear wheel that can be driven forward and reverse separately on the left and right and a pair of left and right front wheels that can be steered is generally equipped with a gasoline engine and its fuel tank is an engine bonnet. It was arranged inside or below the rear wheel fender between the rear wheel fender and the rear wheel (see Patent Document 1).

<p><patcit num="1"><text>Japanese Unexamined Patent Publication No. 2000-351330 (paragraph [0029], Fig. 1, Fig. 2)</text></patcit></p>

<p> By the way, in recent years, attempts have been made to use a fuel gas such as LP gas as an alternative fuel to gasoline. This is because fuel gas such as LP gas is considered to be useful for reducing CO2 and fuel efficiency. However, when using fuel gas such as LP gas in this way, it is necessary to mount a large-capacity gas cylinder for running, and installing such a gas cylinder in the engine bonnet or under the rear wheel fender is a space. Is difficult. Therefore, it is conceivable to dispose the gas cylinder on the engine bonnet or on the upper side of the rear wheel fender, but in either case, the large gas cylinder exists at a relatively high position on the fuselage, so the center of gravity of the aircraft is increased. It may become high and the aircraft may not be stable, or the rear view or side view may be obstructed.</p><p> An object of the present invention is that when mounting a gas cylinder on a riding-type mower, the gas cylinder is supported at a relatively low position of the machine body in a stable and stable position so as not to obstruct the view of the occupant as much as possible, and the gas cylinder comes into contact with other objects. The purpose is to provide a riding-type mower that can be mounted in a state where the possibility of doing so is reduced.</p>

<p>[Solution 1] As described in claim 1, the technical means in the passenger-type mowing machine of the present invention, which is taken to solve the above problems, includes a rear wheel for traveling that can be driven forward and reverse separately for each of the left and right sides, and steering. It is equipped with a pair of left and right front wheels that can be operated, a cockpit is provided at the front-rear distance between the rear wheels and the front wheels, and a gate-shaped fall protection frame with the lower end fixed at the left and right positions on the rear side of the cockpit. A riding-type mowing machine is provided with a support device on the lateral outer side of the fall protection frame on which a cylindrical gas cylinder can be mounted in a sideways posture. The support device mounted on the support device is positioned in front of and behind the fall protection frame. In addition, the central axis of the cylindrical gas cylinder is configured to be mounted in an inclined posture in which the rear side is closer to the center side in the left-right direction of the aircraft in a plan view.</p><p>[Actions and Effects of the Invention of Solution 1] As described above, in the passenger-type mower of the present invention of Solution 1, the lateral outer portion of the fall protection frame is located on the airframe, but the cockpit and engine bonnet. Since it is a relatively low position away from the aircraft, the space on the aircraft is effectively used and the gas cylinder is placed at a low position to prevent the aircraft's weight center from becoming too high and obstruct the side view and rear view. There is little risk. In addition, the low mounting position has the advantage that the labor for loading and unloading the gas cylinder can be reduced.</p><p> Further, in the support device, the gas cylinder is attached so that the central axis of the cylindrical gas cylinder is inclined so as to be closer to the center side in the left-right direction of the airframe toward the rear side in a plan view. Compared with the case where the axis line is arranged along the center line in the front-rear direction of the machine body, the rear end side of the gas cylinder can be arranged so as to be as close to the turning locus of the rear end of the machine body as possible. Therefore, for example, when the rear end side of the airframe is turned close to the wall, the gas cylinder does not greatly protrude from the turning locus, and the gas cylinder does not greatly protrude from the turning locus while avoiding contact with the adjacent wall. It is easy to turn the aircraft and separate it from the wall, which is also advantageous in that the possibility of contact with other objects such as a wall can be reduced.<u style="single">[Solution 2]</u><u style="single"> As described in claim 2, the technical means in the riding-type mower of the present invention taken to solve the above problems is a traveling rear wheel that can be driven forward and reverse separately for each of the left and right sides, and a pair of left and right sides that can be steered. A passenger-type mower equipped with a front wheel, a driver's seat at the front-rear distance between the rear wheel and the front wheel, and a gate-shaped fall protection frame with the lower end fixed at the left and right positions on the rear side of the driver's seat. There,</u><u style="single"> A support device is provided on the lateral outer side of the fall protection frame so that a cylindrical gas cylinder can be mounted in a sideways posture.</u><u style="single"> This support device is mounted in an inclined posture in which the mounted gas cylinder is located in front of and behind the fall protection frame, and the central axis of the cylindrical gas cylinder approaches the center side in the left-right direction of the aircraft toward the rear side in a plan view. It is configured as</u><u style="single">The support device is positioned to cover the upper side of the rear wheels and is provided with a support base in a posture parallel to the front-rear direction of the aircraft, and the central axis of the gas cylinder is inclined with respect to the left and right side edges of the support base in a plan view. It is characterized by that.</u><u style="single">[Action and effect of the invention according to Solution 2]</u><u style="single"> As described above, in the riding-type mower of the present invention according to the solution 2, the central axis of the gas cylinder, which is inclined so as to approach the center side in the left-right direction of the machine in a plan view, is a support base in a plan view. It is inclined with respect to the left and right side edges of the aircraft, and its support is provided at a position covering the upper side of the rear wheels and in a posture parallel to the front-rear direction of the aircraft.</u><u style="single"> Therefore, the support base is in a parallel positional relationship with respect to the rear wheels and can serve as a protective cover on the upper side of the rear wheels and also as a mudguard cover for the rear wheels.</u></p><p>[Solution<u style="single">3</u>] The first in the riding type mower of the present invention<u style="single">3</u>The solution is the claim<u style="single">3</u>As described in the above, the support device is attached to the fall protection frame.</p><p>[Solution<u style="single">3</u>Actions and effects of the invention according to the present invention] As described above, the means for solving the problem.<u style="single">3</u>In the riding-type mower of the present invention, the support device for the gas cylinder is originally supported by a fall protection frame, which is a robust structure. Therefore, the support device is positioned at a predetermined height and reinforced with a separate reinforcing material. It is possible to effectively utilize the strength of the fall protection frame itself and firmly support it without the need for an unnecessary reinforcing structure such as a cylinder. Further, since the support device is attached so that the mounted gas cylinder is located in front of and behind the fall protection frame, the mounted gas cylinder is supported by the fall protection frame near the position of the center of gravity in the front-rear direction and is stable. Well held.</p><p>[Solution<u style="single">4</u>] The first in the riding type mower of the present invention<u style="single">4</u>The solution is the claim<u style="single">4</u>As described in the above, the gas cylinder is supported near the position of the center of gravity in the front-rear direction by a fall protection frame, and the support device is provided so as to overlap the upper side of the rear wheel in a plan view. ..</p><p>[Solution<u style="single">4</u>Actions and effects of the invention according to the present invention] As described above, the means for solving the problem.<u style="single">4</u>In the riding-type mower of the present invention, the gas cylinder is supported near the position of the center of gravity in the front-rear direction by a fall protection frame, and the support device is provided so as to overlap the upper side of the rear wheel in a plan view. , The weight of the gas cylinder is in a state of acting near the ground contact point of the rear wheels. Therefore, there is little possibility that the front-rear balance of the airframe will change due to a change in the gas capacity of the gas cylinder, and there will be no problem that the front-rear balance will change significantly and the turning performance will change, especially in the case of a small mower. ..</p><p></p><p></p>

<figref num="1">It is an overall side view of a riding type mower.</figref><figref num="2">It is the whole plan view of the riding type mower.</figref><figref num="3">It is a rear view which shows the upper side of a riding type mower.</figref><figref num="4">It is a side view which shows the vicinity of the gas cylinder mounting place of a riding type mower.</figref><figref num="5">It is an exploded perspective view which shows the support device part.</figref><figref num="6">It is a top view which shows the support device part.</figref><figref num="7">It is a perspective view which shows the gas cylinder.</figref><figref num="8">It is explanatory drawing which shows the comparative example of a riding type mower.</figref>

Hereinafter, an example of the embodiment of the present invention will be described based on the description in the drawings. [Overall Configuration of Riding-type Mower] FIG. 1 shows the entire side surface of the riding-type mower, which is an example of the work vehicle according to the present invention, and FIG. 2 shows the entire plane. In this riding-type mower, a bar blade type mower 4 is suspended and supported between the front and rear wheels of a self-propelled vehicle body 1 having a vehicle body frame 10 supported by a pair of left and right front wheels 11 and rear wheels 12. It is configured with so-called mid-mount specifications.

At the rear of the self-propelled vehicle body 1, a driving unit 14 containing an engine 18 having the same specifications as a water-cooled gasoline engine having LP gas specifications for fuel supply equipment in a bonnet 19 is a driving unit 14 of the vehicle body frame 10. In addition to being deployed on the rear frame portion 10R, the driver's seat 13 is deployed in the front-rear intermediate part of the self-propelled vehicle body 1 while being positioned within the distance between the front wheels 11 and the rear wheels 12 in the front-rear direction. Has been done. Step 15 located at the foot of the driver's seat 13 is mounted on the front frame portion 10F of the vehicle body frame 10, and fenders 16 are provided on the left and right sides of the driver's seat 13. As shown in FIG. 2, the fenders 16 are left and right so as to avoid interference with the gas cylinder 5 mounted on the support device 3 described later (so that the gas cylinder 5 can be deployed as close to the inside as possible). A part of the rear outer side of the gas cylinder 5 is provided with a recessed side edge 16a that is partially cut out in a shape that follows the outer shape of the gas cylinder 5.

At the rear of the driver's seat 13, a gate-shaped fall protection frame 2 having left and right lower ends fixed to the vehicle body frame 10 is erected substantially vertically in a side view. The fall protection frame 2 includes a columnar lower frame 20 whose lower end side is fixed to the vehicle body frame 10, an arch-shaped upper frame 21 connected to the upper end side of the lower frame 20, and the lower frame 21 thereof. It is composed of a connecting member 22 for connecting to the frame 20. The upper frame 21 is attached to the connecting member 22 so as to be undulating around the swing fulcrum x provided on the connecting member 22, and the fixing bolt is erected on the extension line of the lower frame 20. The posture can be switched between an upright posture in which the 23 is tightened and fixed, and a prone posture in which the fixing bolt 23 is loosened and laid down to the rear side. This foldable configuration of the fall protection frame 2 allows the fall protection frame 2 to work without getting caught in the overhanging branches by folding the fall protection frame 2 when mowing the grass around the trunk of the tree. It is a thing.

A support device 3 for a gas cylinder 5, which will be described later, is attached to the left, right, lateral, and outer sides of the fall protection frame 2, and the gas cylinder 5 filled with LP gas for supplying fuel to the engine 18 is mounted on the support device 3. ing. The LP gas taken out from the gas cylinder 5 is supplied to the fuel injection device (gas injection) (not shown) of the engine 18, and the engine 18 is configured to operate using the supplied LP gas as fuel.

The pair of left and right front wheels 11 are composed of caster-type idle wheels, and the pair of left and right rear wheels 12 are composed of drive wheels capable of continuously variable transmission and forward / reverse operation independently on the left and right. Therefore, by driving the left and right rear wheels 12 in the forward or reverse direction at a constant speed, it is possible to drive straight ahead or in the reverse direction, and by giving a speed difference to the left and right rear wheels 12, an arbitrary speed difference can be obtained. It is configured to be able to steer and turn in the direction. That is, it is equipped with axial plunger type left and right hydrostatic continuously variable transmissions (not shown) that are driven by the power of the engine 18, and the left and right rear wheels 12 are output by the output of the left and right hydrostatic continuously variable transmissions. The swash plate angle operation unit of the hydrostatic continuously variable transmission, which is configured to be driven, and the speed change lever 17, which is arranged so that it can swing back and forth to the left and right of the driver's seat 13, are linked with each other. ing. Therefore, when the shift lever 17 is held in the neutral position in the front-rear direction within the operating range, the hydrostatic continuously variable transmission is in the neutral stop state, and the forward shift can be performed by operating the shift lever 17 forward from the neutral position. By operating it backwards, it is possible to shift backwards.

At this time, the left and right rear wheels 12 rotate in opposite directions at constant left and right speeds, with the center position of the line segment connecting the rotation axis of each rear wheel 12 as the turning center P1 (see FIG. 2) in a plan view. When driven, that is, one of the pair of left and right shift levers 17 is operated forward from the neutral position in the front-rear direction in the operation area, and the other of the shift levers 17 is operated. When the self-propelled aircraft 1 is operated in the region to the rear side by the same amount as the amount of operation to the front side of the one shift lever 17 from the neutral position, the self-propelled aircraft 1 is driven to make a pivot turn around the turning center P1. .. Further, one of the pair of left and right shifting levers 17 is held in the neutral position in the front-rear direction in the operating area, and the other of the shifting levers 17 is held in the operating area in front of the neutral position. By operating to the side or the rear side, a pivot turn is performed with the ground contact point of one of the left and right rear wheels 12 as the turning center. On the contrary, the other of the pair of left and right shifting levers 17 is held in the neutral position in the front-rear direction in the operating area, and the other of the shifting levers 17 is held in the neutral position in the operating area. By operating the vehicle forward or backward from the position, a pivot turn is performed with the ground contact point of the other rear wheel 12 of the left and right rear wheels 12 as the turning center.

The mower 4 is suspended from the vehicle body frame 10 by a link mechanism 40 connected by a pair of left and right front swing links 40a and a pair of left and right rear swing links 40b. The link mechanism 40 is continuously provided with a swing arm 42 integrally provided with a support shaft 41 that integrally swings the rear swing link 40b. By swinging the swing arm 42 with the expansion and contraction of the hydraulic cylinder 43 attached to the vehicle body frame 10, the link mechanism 40 is actuated to raise and lower the mower 4, and the gauge wheel is moved up and down. It is configured so that it can be switched between a descending work state in which the 44 is grounded or substantially grounded, and an ascending non-working state in which the gauge wheel 44 is separated from the ground and stored under the abdomen of the vehicle body frame 10. The mower 4 is of a rear discharge type in which the mowed lawn cut by the bar blade 45 is discharged from a discharge port (not shown) located on the rear side of the self-propelled vehicle body 1. ..

[Support device] As shown in FIGS. 1 to 6, the support device 3 of the gas cylinder 5 is fixed to the support base 30 attached to the fall protection frame 2 and the support base 30 in a mounted state. A winding fastener 31 for the purpose, a front-rear positioning plate 32 for determining the mounting position of the gas cylinder 5 in the front-rear direction, and a circumferential positioning body 33 for positioning the gas cylinder 5 around the axis. It is configured.

The support base 30 is attached to a mounting plate 30A fixed to a mounting bracket 24 welded and fixed to the front and rear of the lower frame 20 of the fall protection frame 2 via mounting bolts 25, and to the lower end of the mounting plate 30A. A triangular reinforcing connecting plate 30C is provided with a pedestal plate 30B extending laterally outward in a row, and the mounting plate 30A and the pedestal plate 30B are welded and connected with their two sides in contact with each other. , It is provided in two places in the front-back direction and is integrally configured. Further, the pedestal plate 30B is formed so that its left and right side edges are along the front-rear direction of the self-propelled machine 1 and substantially parallel to the center line L0 in the front-rear direction of the self-propelled machine 1 in a plan view. .. Then, the front portion of the pedestal plate 30B extends diagonally forward in a downward-sloping manner, the rear portion extends diagonally rearward in a downward-sloping manner, and the intermediate portion thereof is when the self-propelled aircraft 1 is in a horizontal posture. It is formed so as to be a horizontal plane. The pedestal plate 30B configured in this way is located at a position covering the rear wheel 12 in a plan view and above the rear wheel in a side view so as to be able to function as a mudguard member for the rear wheel 12. It is configured in.

A horizontally folded forward mounting piece 30Bf is integrally formed at the front end side portion of the pedestal plate 30B, and extends laterally outward from the vehicle body frame 10 as shown in FIGS. 4 and 5. It is bolted to the upper surface side of the extended front support frame 26. Further, on the rear side of the pedestal plate 30B, a downward mounting piece 30Br hung downward from the lower surface of the horizontal portion of the pedestal plate 30B is welded and fixed, and the front side of the downward mounting piece 30Br is fixed. , As shown in FIGS. 4 and 5, they are attached to the rear surface side of the rear support frame 27 extending laterally outward from the vehicle body frame 10 and connected by bolts. At this time, there is a gap between the upper surface of the rear support frame 27 and the lower surface of the horizontal portion of the pedestal plate 30B, and the upper surface side of the rear support frame 27 directly supports the lower surface side of the pedestal plate 30B. Absent.

The wrapping fixture 31 comprises a lower band member 31A fixed to the pedestal plate 30B, an upper band member 31B connected to one end side of the lower band member 31A via a hinge 34, and the lower band member 31A. A buckle 35 for connecting is provided with a leg bracket 31C for attaching to the pedestal plate 30B, and the end of the lower strip 31A and the upper strip 31B opposite to the side connected by the hinge 34 is used. It is configured to be connected and fixed. As shown in FIGS. 2 and 6, in the winding fixture 31, the axial direction of the gas cylinder 5 fixed by the winding fixture 31 is flat with respect to the center line L0 in the front-rear direction of the self-propelled machine 1. The central axis L1 of the gas cylinder 5 is tilted by a predetermined angle θ and attached so as to be closer to the rear side in the visual view.

Therefore, the gas cylinder 5 fixed by the winding fixture 31 should be closer to the center side in the left-right direction of the machine body toward the rear side than the pedestal plate 30B provided along the front-rear direction of the self-propelled machine body 1. It is in a state of being mounted at an angle of. The predetermined angle θ at which the central axis L1 of the gas cylinder 5 fixed by the winding fixture 31 is inclined with respect to the center line L0 in the front-rear direction of the self-propelled machine 1 is set to about 5 ° to 10 °. ing. As shown in FIG. 2, this predetermined angle θ is the self-propelled airframe 1 when the self-propelled airframe 1 is swiveled around the swivel center P1 corresponding to the central position of the line segment m connecting the rotation axis cores of the rear wheels 12. It is set in consideration of the position of the central axis L1 of the gas cylinder 5 in a direction substantially along the tangent line L2 with respect to the turning locus R at the rear end of the traveling machine 1. At this time, the position of the center of gravity g in the front-rear direction of the gas cylinder 5 is a position near the tipping protection frame 2, but is slightly rearward of the machine body than the line segment m connecting the rotation axis cores of the rear wheels 12. The tangent line L2 with respect to the turning locus R and the central axis L1 of the gas cylinder 5 are set to be orthogonal to the normal line n passing through the center of gravity g.

The leg bracket 31C of the wrapping fixture 31 is configured to be fixed to the pedestal plate 30B by bolt connection, and is formed on the mounting plate portion 36 of the leg bracket 31C to the pedestal plate 30B. The bolt hole 36a is formed by an elongated hole having a major axis in the direction orthogonal to the central axis L1 of the gas cylinder 5 to be fixed, and is configured so that the mounting posture of the winding fixture 31 with respect to the pedestal portion 30B can be finely adjusted.

As shown in FIGS. 4 to 6, a front-rear direction positioning plate 32 for determining a mounting position of the gas cylinder 5 in the front-rear direction is fixed to a portion near the front portion of the pedestal plate 30B. In the front-rear direction positioning plate 32, the upper strips 31B and 31B of the winding fixture 31 are opened upward, and the gas cylinder 5 is mounted on the upper side of the lower strips 31A and 31A, and the front end of the gas cylinder 5 is mounted. By abutting the positions, the gas cylinder 5 is positioned so that it is mounted at an appropriate position in the front-rear direction of the winding fixture 31, and is fixed by welding to the pedestal plate 30B. There is.

A circumferential positioning body 33 for positioning the gas cylinder 5 around the central axis L1 is continuously provided on the leg bracket 31C on the rear side of the winding fixture 31. The circumferential positioning body 33 is erected upward on the rear end side of the channel-shaped support 33a extending rearward from the rear surface side of the rear leg bracket 31C and the support 33a. It consists of pins 33b.

As shown in FIGS. 4 to 6, in the circumferential positioning body 33, when the container body 50 of the gas cylinder 5 is directed in the horizontal direction, the gas outlet 51 and the relief valve 52, which will be described later, are located on the upper side of the container. Positioning hole 53 formed in the cylinder wall portion 50A protruding from the rear end side of the container body 50 of the gas cylinder 5 so that the gas can be taken out from above the liquid level of the liquefied gas inside the main body 50. The pin 33b is inserted into the gas cylinder 3 to correctly determine the position of the gas cylinder 5 mounted on the support device 3 in the circumferential direction.

The gas cylinder 5 is a commercially available cylinder filled with LP gas in which the body of the container body 50 is formed in a cylindrical shape, and the support device 3 in which the cylindrical body of the container body 50 is held by a wrapping fixture 31. In the mounted state, the gas outlet 51 and the relief valve 52 face the rear side of the machine body, and the fuel injection device (gas injection) of the engine 18 (gas injection) (not shown) via the supply hose 54 connected to the gas outlet 51. ) Is configured to supply gas as a fuel.

When the gas cylinder 5 is supported by the support device 3, the upper end of the gas cylinder 5 is located lower than the upper end of the cockpit 13 and lower than the upper end of the lower frame 20 of the fall protection frame 2. Further, it is arranged so as to be at the same or lower position with respect to the upper end of the bonnet 19.

[Comparative Example] In FIG. 8, as the support device 3, as in the present invention, the central axis L1 of the gas cylinder 5 approaches the center line L0 in the front-rear direction of the self-propelled machine 1 toward the rear side in a plan view. The center axis L1 of the gas cylinder 5 fixed by the winding fixture 31 is almost the same as the center line L0 in the front-rear direction of the self-propelled machine 1 in a plan view. The positional relationship between the turning locus R at the rear end of the self-propelled aircraft 1 and the rear end of the gas cylinder 5 when mounted in parallel is shown. As shown in FIG. 8, after the self-propelled airframe 1 when the self-propelled airframe 1 is swiveled around the turning center P1 corresponding to the center position of the line segment connecting the rotating shaft cores of each rear wheel 12. In the structure of this comparative example, the turning locus r2 drawn by the rear end of the gas cylinder 5 is separated by the interval d2 with respect to the turning locus R at the end portion. This interval d2 is self-propelled when the self-propelled airframe 1 described in the embodiment of the present invention is swiveled around the swivel center P1 corresponding to the center position of the line segment connecting the rotation axes of the rear wheels 12. The distance between the turning locus R at the rear end of the aircraft 1 and the turning locus r1 drawn by the rear end of the gas cylinder 5 is considerably larger than the distance d1 (see Fig. 2). Therefore, in the structure shown in this comparative example, when the self-propelled aircraft 1 turns around the turning center P1 from a state close to the wall, the fence, or the standing tree, a part of the gas cylinder 5 is the wall, the fence, or the standing tree. The likelihood of contact with the structure tends to be higher than that of the structure described in the embodiments of the present invention.

The structure described in the embodiment of the present invention may come into contact with the wall, the fence, or a standing tree when turning around the turning center P1 as compared with the structure shown in such a comparative example. There is an advantage in that there is less.

[1 of another embodiment] The engine 18 is not limited to the engine 18 having the same specifications as the water-cooled gasoline engine in which the fuel supply equipment as shown in the above embodiment has LP gas specifications. The supply equipment may have the same specifications as an air-cooled gasoline engine with LP gas specifications.

[2 of another embodiment] The gas cylinder 5 to be supported by the support device 3 is not limited to LP gas, and any gas cylinder 5 of a type to be filled in the cylinder can be mounted.

[3 of Another Embodiment] In the above-described embodiment, the central axis L1 of the gas cylinder 5 mounted on the support device 3 is in the left-right direction of the aircraft toward the rear side with respect to the center line L0 in the front-rear direction of the self-propelled aircraft 1. The pedestal plate 30B of the support device 3 was tilted so as to approach with, and the left and right side edge portions thereof were shown to be formed substantially parallel to the center line L0 in the front-rear direction of the self-propelled aircraft 1. The side edge portion of the pedestal plate 30B of the support device 3 may also be inclined so as to approach the center line L0 in the front-rear direction of the self-propelled machine 1 in the left-right direction of the machine toward the rear side. In this case, it may be the left and right side edge portions of the side edge portion of the pedestal plate 30B of the support device 3, or only the outer side edge is inclined so as to approach the center line L0 in the front-rear direction of the self-propelled aircraft 1. It may be a thing.

[4 of another embodiment] The support device 3 is limited to a support device 3 having a structure in which the support base 30 is composed of a mounting plate 30A, a pedestal plate 30B, and a reinforcing connecting plate 30C as described in the embodiment. Instead, the pedestal plate 30B and the reinforcing connecting plate 30C may be omitted, and the lower strip member 31A of the winding fixture 31 may be directly fixed and attached to the mounting plate 30A. In this case, the lower strip 31A itself needs to be strong enough to support the weight of the gas cylinder 5.

[5 of another embodiment] The structure for supporting the support device 3 on the self-propelled machine 1 is not limited to the structure in which both the vehicle body frame 10 and the fall protection frame 2 support the support device 3, for example, from the vehicle body frame 10 side. The mounting member may be extended as appropriate to be supported only by the vehicle body frame 10. Alternatively, the front and rear of the support base 30 of the support device 3 may not be connected to the vehicle body frame 10 side, but may be supported only by the fall protection frame 2.

The riding-type mower of the present invention is not limited to the mid-mount type riding-type mower as shown in the embodiment, but can be applied to, for example, a front-mount type riding-type mower. Further, the mower is not limited to the rear discharge type, and may be a side discharge type or a mulching type.

1 Self-propelled aircraft 2 Fall protection frame 3 Support device 4 Moor 5 Gas cylinder 10 Body frame 11 Front wheel 12 Rear wheel 13 Driver's seat 30 Support stand P1 Swivel center R Swivel locus L1 Center axis