JP2012071796A - Riding type mowing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate loading and unloading work of a gas cylinder to a machine by stably supporting the gas cylinder at the comparatively low position of the machine, and at a position where visibility of an operator is not disturbed.SOLUTION: The support device 3 of the gas cylinder 25 includes: a fixed frame 30 fixed to a machine body side; a movable frame 31 which can be operated in a rocking manner; and a fixed metal fitting 6 mounted on the movable frame 31. One end of the movable frame 31 is constituted to be connected/disconnected to/from the fixed frame 30, and the other side of the movable frame 31 is pivotally attached to the machine body side at a side lower than a connection point to the fixed frame 30 and around a horizontal direction axis x in a direction which crosses the central axis of the gas cylinder 25 which is loaded in an attitude of falling sideways. Switching between a loading attitude in the attitude of falling sideways and a descent attitude in which it is taken down on the ground in a vertical attitude, can be performed.

Description

  The present invention is a riding-type mower provided with a pilot seat in the front-rear distance between a pair of left and right front wheels and a rear wheel, and provided with a gate-shaped fall protection frame with the lower end positioned on the left and right of the rear side of the pilot seat. About.

  As described above, a riding mower equipped with a pair of left and right steering front wheels and a driving rear wheel is generally equipped with a gasoline engine, and its fuel tank is placed in the engine bonnet or below the rear wheel fender. It was arrange | positioned between the rear-wheel fender and the rear wheel (refer patent document 1).

JP 2000-351330 A (paragraph [0029], FIG. 1 and FIG. 2)

In recent years, attempts have been made to use fuel gas such as LP gas as an alternative fuel for gasoline. This is because fuel gas such as LP gas is considered to be useful for reducing CO2 and fuel consumption. However, when fuel gas such as LP gas is used in this way, it is necessary to travel with a large-capacity gas cylinder installed, and installing such a gas cylinder in the engine hood or under the rear wheel fender is a space. Is difficult.
Therefore, it is conceivable to arrange a gas cylinder on the engine bonnet or on the upper side of the rear fender. In either case, a large gas cylinder exists at a relatively high position on the aircraft, so the center of gravity of the aircraft is There is a risk that the aircraft will become high and the stability of the fuselage will be lost, and the rear view and the side view will be hindered.

  An object of the present invention is to mount a gas cylinder on a riding-type mower, support the gas cylinder at a relatively low position of the fuselage at a position that is as stable as possible and hardly obstructs the view of the passenger, and unloads the gas cylinder from the fuselage. The object is to provide a riding mower that facilitates the work.

[Solution 1]
The technical means in the riding-type mower of the present invention taken to solve the above problems includes a pilot seat at the front-rear distance between the pair of left and right front wheels and the rear wheel, and lower left and right sides at the rear side of the pilot seat. A riding-type mower with a gate-shaped fall protection frame positioned,
Provided with a support device that can be mounted in a posture in which a cylindrical gas cylinder is laid down on the lateral outer side of the fall protection frame,
The support device includes a fixed frame fixed to the body side, a movable frame supported so as to be swingable with respect to the body, and a fixing bracket attached to the movable frame.
The movable frame is configured such that one end side of the movable frame can be connected to and disconnected from the fixed frame, and the other end side of the movable frame is positioned below the connection point with the fixed frame and laid down sideways. Pivoted around the horizontal axis in the direction intersecting the central axis of the cylindrical gas cylinder mounted in
By swinging the movable frame around the horizontal axis and connecting to the fixed frame, the mounting posture in which the gas cylinder is mounted on the aircraft in a lateral position and the connection to the fixed frame are released. It is characterized in that the posture can be switched between a vertically lowered posture and a lowered posture lowered on the ground.

[Operation and effect of invention according to Solution 1]
As described above, according to the invention relating to the solution 1, the laterally outer side portion of the fall protection frame is a relatively low position that is out of the control seat and the engine bonnet even though it is on the fuselage. By effectively using the gas cylinder, the gas cylinder is arranged at a low position to prevent the center of gravity of the airframe from becoming too high, and there is little possibility of obstructing the side view and the rear view.

The support device is provided with a fixing bracket for fixing the gas cylinder to a movable frame supported so as to be swingable with respect to the airframe. The gas cylinder can be stacked while supporting the weight support of the gas cylinder on the movable frame. Since the lowering operation can be performed, there is an advantage that the swing operation is relatively light.
Moreover, the swinging of the movable frame is performed around the horizontal axis in the direction intersecting the central axis of the cylindrical gas cylinder mounted in the horizontal position. The posture is not the sideways posture but the vertical direction. For this reason, as compared with the case where the swinging operation is performed so as to be in the descending posture while being in the sideways posture, the amount of lifting and lowering of the gas cylinder associated with the swinging operation is small, and in this respect also the labor of the loading and unloading work can be reduced. Further, since the gas cylinder in the lowered position is in an upright position, it is more convenient when reloading to another vehicle or transporting the gas cylinder while being tilted slightly, rather than maintaining the horizontal position.

The support device does not support the weight support in the mounting position of the gas cylinder not only by the movable frame supported so as to be swingable with respect to the airframe, but by the cooperation with the fixed frame fixed on the airframe side. Since it can be supported, the overall structure can be reduced in weight compared to a structure in which the weight in the mounting posture of the gas cylinder is supported only by the movable frame.
In other words, if the support device consists only of a movable frame, the weight of the gas cylinder must be supported only by the strength of the movable frame, both when mounted on the aircraft and when swinging when loading and unloading. In other words, a large frame with a considerably high strength is required as the movable frame. In addition, if a gas cylinder that is formed in a cylindrical shape and is long in the central axis direction is to be stably supported in the mounting posture on the airframe, a movable frame is provided on both ends in the central axis direction of the gas cylinder and both ends are supported. It is desirable to do. However, if the movable frames are provided on both ends as described above, it is necessary to secure a space for the movable frames on both ends to swing, and the space is limited in a narrow space on the lateral side of the fall protection frame. Adopting such a structure is actually difficult and difficult to adopt.

On the other hand, according to the present invention, the movable frame configured to be swingable and the end of the movable frame opposite to the pivotally attached portion are connected to the fixed frame to obtain the mounting posture of the support device. Therefore, in the mounting posture, both the end sides in the central axis direction of the gas cylinder can be stably supported by both the movable frame and the fixed frame. When loading and unloading, the weight of the gas cylinder is not supported by the fixed frame and the weight of the gas cylinder is supported by the movable frame. In this case, the operator loads and unloads the gas cylinder while supporting the gas cylinder. Since the work is performed, it is not necessary to improve the strength of the movable frame so that the entire weight of the gas cylinder is supported only by the movable frame.
Therefore, there is no need to specially improve the strength of the movable frame as a support device, and the lightweight support device is used to mount both ends of the gas cylinder in the central axis direction between the movable frame and the fixed frame when mounted on the fuselage. There is an advantage that it can be supported stably.

[Solution 2]
The second solving means in the riding mower of the present invention is to equip the movable frame on the rear side in the longitudinal direction of the aircraft with respect to the fixed frame, and to swing freely around the horizontal horizontal axis along the lateral direction of the aircraft. It is characterized by being pivotally attached.

[Operation and effect of invention according to Solution 2]
As described above, in the invention according to the solution means 2, the movable frame is mounted on the rear side in the front-rear direction of the machine body relative to the fixed frame, and the position where the gas cylinder is in the descending posture directed in the vertical direction is set in the riding mower. The rear side of the aircraft can be used.
Therefore, the amount of swinging movement of the movable frame can be reduced compared with the case where the movable frame is swung in the horizontal position or swung in the lateral direction of the airframe or forward of the airframe. The rocking radius from the pivot point of the frame can be shortened to make the whole compact, and the labor for loading and unloading the gas cylinder can be reduced.

[Solution 3]
In the third solution of the riding mower according to the present invention, the connecting portion between the fixed frame and the movable frame is near the portion immediately below the gas cylinder mounting portion that is separated from the pivotally attached portion of the movable frame to the lateral side of the body. It is characterized by.

[Operation and effect of invention according to Solution 3]
As described above, in the invention according to the solution means 3, the fixed frame and the movable frame are connected in the vicinity immediately below the gas cylinder mounting portion that is distant from the pivot side of the movable frame to the lateral side of the machine body. The weight of the gas cylinder acting on the frame acts as an unbalanced load in the direction of tilting the movable frame to the lateral side of the fuselage with respect to the pivot point of the movable frame, as opposed to the pivot point of the movable frame. This can be mitigated by the presence of a fixed frame connected to the end on the side.
In other words, the fixed frame fixed to the fuselage side is connected at a position away from the pivot point of the movable frame to the lateral side of the fuselage, so that the weight of the gas cylinder in the mounting posture is also borne by the fixed frame. Therefore, there is an advantage that the weight of the gas cylinder acting on the movable frame side can be reduced, the unbalanced load acting in the sideways direction of the movable frame can be reduced, and an increase in the strength of the movable frame can be avoided.

[Solution 4]
The fourth solving means in the riding mower according to the present invention is characterized in that the fixed frame is fixed to the fall protection frame at a location located outside the pivot attachment location of the movable frame with respect to the aircraft.

[Operations and effects of invention according to Solution 4]
As described above, in the invention according to the solution means 4, since the fixed frame is fixed to the fall protection frame at a position located outside the pivot attachment position of the movable frame with respect to the airframe, The amount of overhang on the side can be reduced. As a result, the weight of the gas cylinder that acts on the part of the fixed frame that protrudes laterally outward can reduce the value of the moment that acts on the fixed part of the fixed frame, reducing the required strength of the fixed frame and reducing the weight. There is an advantage that can be achieved.

1 is an overall side view of a riding mower. 1 is an overall plan view of a riding mower. 1 is an overall rear view of a riding mower. It is a side view which shows the gas cylinder mounting location vicinity of a riding-type mower. It is a side view which shows the operation state of a support apparatus part. It is a disassembled perspective view which shows a support apparatus part. It is a side view which shows a support apparatus part. It is the VIII-VIII sectional view taken on the line in FIG. It is the IX-IX sectional view taken on the line in FIG. It is sectional drawing which shows the connection location of the fixed frame and movable frame of a support apparatus. It is operation | movement explanatory drawing in a support apparatus part. It is a disassembled perspective view which shows a support apparatus part.

Hereinafter, an example of an embodiment of the present invention will be described based on the drawings.
[Overall configuration of riding mower]
FIG. 1 shows an entire side surface of a riding mower as an example of a work vehicle according to the present invention, and FIG. 2 shows an entire plane. In this riding mower, a bar blade type mower 4 is supported in a freely hangable manner between front and rear wheels of a self-propelled vehicle body 1 including a vehicle body frame 10 supported by a pair of left and right front wheels 11 and rear wheels 12. The so-called mid-mount specification is used.

In the rear part of the self-propelled vehicle body 1, a driving unit 14 that houses an engine 18 having the same specification as a water-cooled gasoline engine having an LP gas specification as a fuel supply device is provided in a bonnet 19. A driver's seat 13 is provided on the rear frame portion 10R in a state where the front wheel 11 and the rear wheel 12 are positioned within the space in the front-rear direction at the front-rear intermediate portion of the self-propelled vehicle body 1. Has been.
A step 15 located at the foot of the cockpit 13 is mounted and mounted on the front frame portion 10F of the vehicle body frame 10, and a rear wheel fender 16 is provided on the left and right sides of the cockpit 13. As shown in FIG. 2, the rear wheel fender 16 is disposed on the rear outer side of the left and right rear wheel fenders 16 so as to avoid interference with a housing case 5 of a gas cylinder 25 mounted on a support device 3 described later. A concave side edge 16a is partially cut out in a shape that partially conforms to the outer shape of the housing case 5.

At the rear part of the cockpit 13, a gate-shaped overturning protection frame 2, which has left and right lower ends fixed to the body frame 10, is erected substantially vertically in a side view.
The fall protection frame 2 includes a columnar lower frame 20 having a lower end fixed to the body frame 10, an arch-shaped upper frame 21 connected to the upper end side of the lower frame 20, and the upper frame 21 connected to the lower frame. The connecting member 22 is connected to the frame 20.
The upper frame 21 is attached to the connection member 22 so as to be able to rise and fall around a swinging fulcrum p4 provided to the connection member 22, and is fixed to the stand up on the extension line of the lower frame 20 The posture can be switched between a standing posture in which 23 is fastened and fixed, and a lying posture in which the fixing bolt 23 is loosened to fall backward.
The foldable structure of the fall protection frame 2 is for folding the fall protection frame 2 when mowing around the trunk of the tree so that the work can be performed without being caught by the overhanging branch. is there.

  A support device 3 for a gas cylinder 25, which will be described later, is attached to the left and right lateral outer sides of the fall protection frame 2, and a gas cylinder 25 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 25 is supplied to a fuel injection device (gas injection) (not shown) of the engine 18, and the engine 18 is operated using the supplied LP gas as fuel.

The pair of left and right front wheels 11 are caster-type idler wheels, and the pair of left and right rear wheels 12 are configured as drive wheels that can be continuously stepped and rotated forward and backward independently. Therefore, the left and right rear wheels 12 can be driven forwardly or reversely at the same speed, thereby allowing the vehicle to travel straight forward or backward, and by giving a speed difference to the left and right rear wheels 12 It is configured to be able to steer and turn in the direction.
That is, it includes an axial plunger type left and right hydrostatic continuously variable transmission (not shown) driven by the power of the engine 18, and the left and right rear wheels 12 are output by outputs of the left and right hydrostatic continuously variable transmissions. The swash plate angle operating part of the hydrostatic continuously variable transmission and the shift lever 17 arranged to be able to swing back and forth to the left and right of the cockpit 13 are linked with each other. ing.
As a result, when the shift lever 17 is held at the neutral position in the front-rear direction within the operation region, the hydrostatic continuously variable transmission is in a neutral stop state, and the forward shift is performed by operating the shift lever 17 forward from the neutral position. However, reverse gear shifting can be performed by operating backward.

At this time, the left and right rear wheels 12 are in the rotational directions opposite to each other at the constant left and right speeds, with the center position of the line segment connecting the rotational axes of the rear wheels 12 in plan view as the turning center P1 (see FIG. 2). When driven, that is, one of the pair of left and right speed change levers 17 is operated in front of the neutral position in the front-rear direction within the operation region, and the other of the speed change levers 17 is operated. When the vehicle is operated backward by an amount equal to the forward operation amount of the one shift lever 17 from the neutral position in the region, the self-propelled aircraft 1 is driven to pivot around the turning center P1. .
Further, one of the pair of left and right speed change levers 17 is held in a neutral position in the front-rear direction within the operation region, and the other of the speed change levers 17 is located in front of the neutral position within the operation region. By operating to the side or 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 speed change levers 17 is held in a neutral position in the front-rear direction within the operation area, and the other of the speed change levers 17 is held in the neutral position within the operation area. By operating 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 provided with a swing arm 42 provided integrally with a support shaft 41 that supports the rear swing link 40b so as to be swingable integrally. By oscillating the oscillating arm 42 in accordance with the expansion / contraction operation of the hydraulic cylinder 43 attached to the vehicle body frame 10, the link mechanism 40 is operated to move the mower 4 up and down. Switching operation can be switched between a descending work state in which 44 is grounded or substantially grounded and a non-raising state in which the gauge wheel 44 is separated from the ground and stored under the belly of the vehicle body frame 10.
The mower 4 is configured as a rear discharge type that discharges the cut grass cut by the bar blade 45 from a discharge port (not shown) positioned on the rear side of the self-propelled vehicle body 1. .

[Supporting device]
As shown in FIGS. 1 to 7, the support device 3 for the gas cylinder 25 is connected to the front fixed frame 30 attached to the lower frame 20 of the fall protection frame 2 and the rear frame portion 10 </ b> R of the vehicle body frame 10. The rear movable frame 31 is supported so as to be swingable, the housing case 5 attached to the movable frame 31, and the fixing bracket 6 built in the housing case 5.

As shown in FIGS. 4 to 7, the fixed frame 30 is fixed by welding one end side corresponding to the front end side in the longitudinal direction of the machine body to the lower frame 20 of the fall protection frame 2 and the other end side shown in FIG. As shown in FIG. 4, the wing is bent in an L shape when viewed in the up-down direction and extends outward from the aircraft body.
A plate-like connecting piece 30a connected to the opposite end on the movable frame 31 side is integrally provided at the end on the other end side that extends outward from the machine body.

The movable frame 31 includes a rod-shaped upper support rod 32 disposed along the front-rear direction so as to support the storage case 5 in a mounting posture connected to the fixed frame 30, and a body of the rod-shaped upper support rod 32. A swing support rod 33 that supports the rear end portion and swingably supports around a horizontal axis x (corresponding to a horizontal axis) in the left-right direction of the machine body is provided.
In the mounting posture connected to the fixed frame 30, the upper support rod 32 includes a U-shaped connection piece 32 a for sandwiching the connection piece 30 a on the fixed frame 30 side from the left and right sides at the end on the front side of the body. The end portion on the rear side of the machine body is welded to the end portion of the swing support rod 33 and is integrally connected.
The swing support rod 33 includes a laterally-facing flange portion 33A extending from the portion connected to the upper support rod 32 toward the center side in the left-right direction of the machine body, and a central-side portion of the laterally-facing flange part in the left-right direction of the machine body. And a vertical flange portion 33B bent downward, and is formed into a shape bent in an L shape when viewed from the front-rear direction of the body.

  As shown in FIGS. 4 to 6, the lower end portion of the swing support rod 33 is sandwiched from the left and right sides with respect to the support piece 34 a of the bracket 34 attached to the rear frame portion 10 </ b> R of the vehicle body frame 10. A U-shaped support connecting piece 33a located in a state is provided. Accordingly, the support shaft 34c penetrating the support holes 34b and 34b formed in the support piece 34a and the support connecting piece 33a, respectively, around the horizontal axis x that is the axis of the support shaft 34c. The swing support rod 33 is configured to swing freely.

As shown in FIGS. 4 and 6, a clip member 35 made of a leaf spring is provided on the side of the vehicle body frame 10 that corresponds to the middle portion of the vertical flange portion 33B of the swing support rod 33.
The clip member 35 is bent and formed in a U shape in plan view, and is attached to the vehicle body frame 10 with the opening side directed toward the rear side of the machine body. When the movable frame 31 is in the mounting posture, the vertical flange portion 33B. Is configured to regulate the swinging of the longitudinal saddle portion 33B in the front-rear direction in a state in which it is held in an elastic manner.
The elastic pinching by the clip member 35 is automatically sandwiched as the vertical hook portion 33B swings to the mounting posture side, and when the vertical hook portion 33B swings to the lowering posture side, Thus, it is configured to have a relatively weak elastic clamping force that can be released by applying a slight pulling operation force.

As shown in FIGS. 6 to 8, the upper support rod 32 whose rear end side is connected to the swing support rod 33 has a mounting plate 36 welded to the upper side, and is accommodated in the mounting plate 36. A bolt that mounts the bottom surface side of the case 5 and passes through the mounting plate 36, the bottom member 5 </ b> A positioned on the bottom surface side of the housing case 5, and a leg bracket 60 (described later) of the fixing metal 6 built in the housing case 5. It is tightened and connected at 65.
Further, the U-shaped connecting piece 32a attached to the end of the upper support rod 32 on the front side of the machine body is provided with the swing support rod 33 as shown in FIGS. Locking holes 30b formed in each of the connecting pieces 30a, 32a, 32a in the mounting posture, located on the left and right sides of the connecting piece 30a formed at the end of the fixed frame 30 on the rear side of the machine body. The center lines p1 of 32c and 32c are made to coincide with each other so as to be connected by inserting one connecting pin 37.
The connection location of the connection pieces 30 a, 32 a, and 32 a by the connection pin 37 is a position away from the position where the bracket 34 is pivotally attached to the movable frame 31 to the laterally outer side of the machine body. It is near the center axis L of the gas cylinder 25 to be mounted.

The connecting pin 37 is inserted and supported by a channel-shaped holding body 32b welded to and connected to an outer portion of the connecting piece 32a located on the laterally outer side of the fuselage among the U-shaped connecting pieces 32a, and The urging spring 37a provided inside the holding body 32b is always urged toward the side of the coupling pieces 30a, 32a, 32a that engages with the locking holes 30b, 32c, 32c.
Therefore, when the connecting pin 37 is engaged and disengaged, the gripping portion 37b of the connecting pin 37 is pulled outwardly against the urging force of the urging spring 37a to connect the connecting pieces 30a, 32a, 32a. If the pulling operation is canceled when the center lines p1 of the locking holes 30b, 32c, 32c coincide, the connecting pin 37 is inserted, and the connecting pieces 30a, 32a, 32a are connected.

Since the support device 3 is configured as described above, the housing case 5 can be maintained in a horizontal posture in a mounting posture in which the fixed frame 30 and the movable frame 31 are connected as shown in FIG. By removing the connection pin 37 from the locking holes 30b, 32c, 32c from this mounting posture, the connection between the fixed frame 30 and the movable frame 31 is released, and the movable frame 31 is swung around the horizontal axis x. As shown in FIG.
For example, if the posture of the storage case 5 using the support device 3 is changed to the left side of the machine body, the connection pin 37 is removed and the connection between the fixed frame 30 and the movable frame 31 is released. The left hand is put into an opening 50b formed in the bottom plate 50 of the bottom member 5A, which will be described later, and the right hand is operated to tilt backward while pressing the rear upper side of the lid member 5B.

  The front end side of the fixed frame 30 is welded and attached to the lower frame 20 of the fall protection frame 2 fixed to the airframe. The mounting position of the fixed frame 30 is the pivot of the movable frame 31 with respect to the airframe. Since the overturn protection frame 2 projects outward from the position where the bracket 34 which is the attachment location is present, the frame is positioned on the outer side of the machine body relative to the pivot attachment location of the movable frame 31.

  The clip member 35 attached to the vehicle body frame 10 is attached to an end portion of the upper support rod 32 of the movable frame 31 on the front side of the machine body in a state where the vertical flange portion 33B is sandwiched by the clip member 35. The formed U-shaped connecting piece 32a is positioned on both the left and right sides of the connecting piece 30a on the fixed frame 30 side, and the center lines p1 of the locking holes 30b, 32c, 32c formed respectively coincide with each other The position of the clip member 35 is determined so that

〔securing bracket〕
As shown in FIGS. 7, 8, 9, 11, and 12, the fixing bracket 6 housed in the housing case 5 is provided with a fastening fixture 61 on each of the pair of front and rear leg brackets 60. The tightening fixture 61 includes lower belt members 62 and 62 and upper belt members 63 and 63 wound around the large diameter portion of the gas cylinder 25. These lower belt members 62 and 62 and the upper belt member 62 and 62 The strips 63 and 63 are configured so that the gas cylinder 25 can be fixed in the embracing state by being fastened and coupled by the coupling tool 64 while being wound around the large diameter portion of the gas cylinder 25.
The lower strips 62, 62 are formed of semicircular strips that are open upward so as to face the outer periphery of the lower half of the gas cylinder 25, and are fixed to the leg bracket 60 by welding. The upper strips 63, 63 are pivotally connected to the end portions of the lower strips 62, 62 that are closer to the inward side in the lateral direction of the machine body so as to be swingable and openable about the longitudinal axis p2. The gas cylinder 25 is made of a semicircular strip that is open downward so as to face the upper half of the gas cylinder 25.
And the gas cylinder 25 is stably connected by fastening the end portions of the upper belt members 63, 63 and the lower belt members 62, 62 closer to the outer side in the lateral direction of the machine body with the connecting tool 64. It is configured to be fixed.

A longitudinal axis p2 provided at the end of the lower strips 62, 62 closer to the inner side in the left-right direction of the machine body is directly below the central axis L of the gas cylinder 25 mounted on the lower strips 62, 62. The position is set near the opening edge at the end of the housing member 5B and the lid member 5B, which will be described later, at a position closer to the body side in the lateral direction of the body.
In addition, the front-rear axis p2 is present at the ends of the upper strips 63, 63 and the lower strips 62, 62 on the side opposite to the portion pivotally connected at the position of the front-rear axis p2. The location is located on the opposite side of the central axis L of the gas cylinder 25 and is configured to be tightened and connected by a connector 64.

[Containment case]
As shown in FIGS. 6 to 9 and FIGS. 11 and 12, the storage case 5 is in a state of being mounted on the self-propelled aircraft 1 and is an upwardly-opened cage fixed to the upper support rod 32. A bottom member 5A formed in a shape, and a lid member 5B formed in a downward-opening bowl shape that is swingably opened and closed with respect to the bottom member 5A. Is formed.

As shown in FIGS. 8, 9, 11, and 12, the bottom member 5 </ b> A includes a bottom plate 50 that is formed in a bowl shape that is open upward, and a front plate 51 that is connected by welding to the front end side of the bottom plate 50. And a rear plate 52 connected to the rear end side of the bottom plate 50 by welding. As shown in FIGS. 4, 5, and 7, the bottom plate 50 is located near the upper side of the connection pin 37 provided at the connection point between the fixed frame 30 and the movable frame 31. An opening 50b into which a finger can be inserted from the outside is formed at a location near the front end side of the housing case 5. The opening 50b is for facilitating the support of the storage case 5 when the storage case 5 is changed between the mounting posture and the descending posture. Is formed.
Although the front plate 51 has a shape close to the octagonal cross section of the housing case 5 as a whole, a cutout portion 51a in which a part of the octagon is cut off at a portion corresponding to the inward side in the left-right direction. Is provided. This is to prevent a part of the housing case 5 from coming into contact with the fall protection frame 2 when the housing case 5 is swung along with the swinging operation of the movable frame 31 of the support device 3. is there.
The rear plate 52 is formed in the same shape as the octagon which is the cross-sectional shape of the housing case 5 as a whole, and on the outer surface of the housing case 5 corresponding to the rear side in the front-rear direction of the fuselage, The part 52a is continuously provided.
The rear plate 52 is mounted in the direction of the central axis L of the gas cylinder 25 by mounting the lower end side of the gas cylinder 25 when the gas cylinder 25 is stored in the storage case 5 with the storage case 5 in the lowered posture. The position of the pair of front and rear tightening fixtures 61 of the fixing bracket 6 is determined based on the position of the rear plate 52 as a reference in the large diameter portion of the gas cylinder 25. The position is set so as to fix and tighten the part.

As shown in FIGS. 8, 9, and 11, 12, the lid member 5B is attached to the bottom member 5A so as to be swingable and openable via a pair of front and rear axial centers p3.
That is, as shown in FIGS. 8, 9, 11, and 12, the rising toward the inward side of the housing case 5 on each of the front end side and the rear end side of the cover plate 53 formed in the shape of a downwardly opened bowl. Ribs 54 and 55 are formed, and each of the rising ribs 54 and 55 is laterally lateral with respect to the front plate 51 and the rear plate 52 around a common pivot axis p3 in the longitudinal direction of the machine body. It is pivotally attached to the rocker.
As shown in FIGS. 8 and 9 and FIGS. 11 and 12, the front plate 51 and the rear plate 52 are respectively provided with partial arc-shaped guide grooves 51b and 52b having the pivot axis p3 as the center of curvature. The guide rods 54a and 55a engaged with the guide grooves 51b and 52b are fixed to the rising ribs 54 and 55, respectively. Accordingly, the guide rods 54a and 55a can switch the posture between the open posture and the closed posture by swinging the lid member 5B within the stroke range of the guide grooves 51b and 52b. The positions of the guide rods 54a and 55a and the positions of the guide grooves 51b and 52b are set so as to have the same positional relationship around the common swing axis p3.

As shown in FIGS. 7 and 12, the lid plate 53 has a cutout portion 53 a obtained by excising a part of the lid plate 53 in a part on the front side in the front-rear direction of the aircraft in the mounting posture with respect to the self-propelled aircraft 1. The bottom plate 50 is also provided with a cutout portion 50a in which a part of the bottom plate 50 is cut off at a part of the front side in the longitudinal direction of the machine body. As shown in FIGS. 7 and 8, the cut-out portions 50 a and 53 a are configured such that the bottom plate 50 and the lid plate 53, which are part of the housing case 5, fall when the housing case 5 is in the mounting posture. This is for avoiding contact with the protective frame 2. The cut portions 50 a and 53 a are formed at locations corresponding to the outer side of the small diameter portion that is out of the large diameter portion of the gas cylinder 25.
As shown in FIG. 12, the rising rib 54 positioned on the front end side of the lid plate 53 among the rising ribs 54 and 55 is cut off by partially cutting off the front plate side of the bottom plate 50 and the lid plate 53 as shown in FIG. 12. Are formed shorter than the rising rib 55 located on the rear end side. Thereby, it is possible to prevent the rising rib 54 located on the front end side of the lid plate 53 from coming into contact with the fall protection frame 2.

  As shown in FIGS. 1 to 3, the housing case 5 configured in this way is disposed on the rear side of the rear wheel fender 16 at a position covering the upper part of the rear half of the rear wheel 12. In other words, the housing case 5 also serves as a protective cover that covers the upper side of the rear wheel 12 separately from the rear wheel fender 16, and also has a function as a mudguard cover for the rear wheel 12. it can.

  As shown in FIGS. 1, 3, and 4, the upper end edge position of the storage case 5 is such that the upper end of the storage case 5 is higher than the upper end of the cockpit seat 13 in the mounting posture in which the gas cylinder 25 is supported by the support device 3. It exists in a low position and is located in a position lower than the upper end of the lower frame 20 of the fall protection frame 2. Moreover, although it arrange | positions so that it may be in the same or high position also with respect to the upper end of the bonnet 19, you may set it so that it may become a little low position with respect to the upper edge of the bonnet 19.

[Others]
The gas cylinder 25 is a commercially available cylinder filled with LP gas in which the body portion of the container main body 25a is formed in a cylindrical shape, and the cylindrical body portion of the container main body 25a is held by a tightening fixture 61 to support the device. 3 is in a mounting posture along the longitudinal direction of the fuselage, the gas outlet 25b from the gas cylinder 25 faces the front side of the fuselage, and the fuel injection device of the engine 18 via the supply hose 26 connected to the gas outlet 25b. A gas serving as a fuel is supplied to (gas injection) (not shown).

[Other Embodiment 1]
The engine 18 is not limited to the one having the same specifications as the water-cooled gasoline engine in which the fuel supply device shown in the above embodiment is the LP gas specification, and the fuel supply device is the LP gas. It may be the same specification as the air-cooled gasoline engine specified.

[Second embodiment]
The gas cylinder 25 to be supported by the support device 3 is not limited to LP gas, and an arbitrary gas cylinder 25 of a type filled in the cylinder can be mounted.

[3 of another embodiment]
In the above-described embodiment, the gas cylinder 25 mounted on the support device 3 has a structure in which the central axis L thereof is disposed substantially parallel to the center line in the front-rear direction of the self-propelled aircraft 1. However, the present invention is not limited to this, and for example, the gas cylinder 25 may be disposed so that the central axis L thereof is in a slanted posture slightly inclined with respect to the center line in the front-rear direction of the self-propelled aircraft 1.
In this case, the horizontal axis x of the movable frame 31 of the support device 3 is set in a direction orthogonal to the central axis L of the gas cylinder 25 in plan view, and the lowered attitude position of the gas cylinder 25 is supported in the mounting attitude. You may set so that it may become the machine body side of the diagonally backward side of the self-propelled machine body 1 or the aircraft outer side of the diagonally forward side. In this case, it is desirable that the direction in which the central axis L of the gas cylinder 25 is inclined is closer to the aircraft center line toward the rear side of the aircraft.

[4 of another embodiment]
In the above-described embodiment, the gas cylinder 25 mounted on the support device 3 has a structure in which the central axis L thereof is disposed substantially parallel to the center line in the front-rear direction of the self-propelled aircraft 1. Although the horizontal axis x of the movable frame 31 of the support device 3 is set in a direction orthogonal to the central axis L of the gas cylinder 25 in plan view, the present invention is not limited to this, and for example, the movable frame of the support device 3 31 is set to a posture in which the horizontal axis x of the gas cylinder 25 is slightly inclined with respect to the central axis L of the gas cylinder 25, and the descending posture position of the gas cylinder 25 is inclined from the position supported by the mounting posture. It may be set so as to be on the rear side of the body side or on the diagonally forward side of the body side. In this case, it is desirable that the direction in which the central axis L of the gas cylinder 25 is inclined is closer to the aircraft center line toward the rear side of the aircraft.

[5 of another embodiment]
The support device 3 is not limited to the structure in which the gas cylinder 25 is housed in the housing case 5 as described in the embodiment, and the fixing device 6 is directly attached to the movable frame 31 so that the gas cylinder 25 is entirely attached. It may be mounted in an exposed state.

[6 of another embodiment]
The structure for supporting the support device 3 on the self-propelled machine body 1 is not limited to the structure in which the support device 3 is supported by both the body frame 10 and the overturn protection frame 2, but may be directly supported by the body frame 10. . For example, an inverted L-shaped fixed frame 30 comprising a vertical member along the lateral side surface of the body frame 10 and a lateral member extending laterally outward from the upper end side thereof is configured, and the movable body mounted on the body frame 10 side. You may comprise so that it may connect with the flame | frame 31. FIG.

[7 of another embodiment]
The support device 3 integrally fixes the mounting plate 36 or the bottom member 5A of the housing case 5 to the swing support rod 33 without using the upper support rod 32 of the movable frame 31, and the attachment plate 36, or the bottom member 5A of the housing case 5 is provided with a connection structure with the fixed frame 30, so that the mounting plate 36 or the bottom member 5A of the housing case 5 is also used as a part of the movable frame 31. May be.

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

DESCRIPTION OF SYMBOLS 1 Self-propelled machine body 2 Fall protection frame 3 Support apparatus 4 Moore 5 Housing case 6 Fixing bracket 10 Body frame 11 Front wheel 12 Rear wheel 13 Pilot seat 25 Gas cylinder 30 Fixed frame 31 Movable frame L Center axis x Horizontal axis (Horizontal axis) )

Claims (4)

A riding-type grass mower equipped with a pilot seat at the front-rear distance between a pair of left and right front wheels and a rear wheel, and provided with a gate-shaped fall protection frame with the lower end located on the left and right of the rear side of the pilot seat,
Provided with a support device that can be mounted in a posture in which a cylindrical gas cylinder is laid down on the lateral outer side of the fall protection frame,
The support device includes a fixed frame fixed to the body side, a movable frame supported so as to be swingable with respect to the body, and a fixing bracket attached to the movable frame.
The movable frame is configured such that one end side of the movable frame can be connected to and disconnected from the fixed frame, and the other end side of the movable frame is positioned below the connection point with the fixed frame and laid down sideways. Pivoted around the horizontal axis in the direction intersecting the central axis of the cylindrical gas cylinder mounted in
By swinging the movable frame around the horizontal axis and connecting to the fixed frame, the mounting posture in which the gas cylinder is mounted on the aircraft in a lateral position and the connection to the fixed frame are released. A riding-type mower characterized in that the posture can be switched between a vertically lowered posture and a lowered posture lowered on the ground.   2. The riding-type mower according to claim 1, wherein the movable frame is mounted on the rear side in the longitudinal direction of the machine with respect to the fixed frame, and is pivotably pivoted around a horizontal horizontal axis along the horizontal direction of the machine.   The riding mower according to claim 1 or 2, wherein a connection point between the fixed frame and the movable frame is in the vicinity immediately below a gas cylinder mounting portion that is separated from the pivotally attached portion of the movable frame to the laterally outer side of the machine body.   The riding type mower according to claim 1, 2, or 3, wherein the fixed frame is fixed to the fall protection frame at a position located outside the pivot attachment position of the movable frame with respect to the airframe.

Images