JP4791933B2 - Moore - Google Patents

Description

  The present invention relates to a mower in which a plurality of rotating blades that are driven to rotate about a longitudinal axis are arranged in parallel inside a mower deck.

Is in the prior art, for example, as disclosed in Patent Document 1, by attaching and detaching the balloon prevention plate (13 in FIG. 2 of Patent Document 1), a grass clippings reaped by rotating blades within the mower deck There is known a mower that is configured to be able to appear in a mulching form in which the mowing grass is cut by being retained and in a side discharge form in which the mowing grass cut by a rotating blade is discharged from the side of the moor deck. Further, as disclosed in Patent Document 2, by removing and attaching the shredding baffle (26 in FIG. 7 of Patent Document 2), the mowing grass cut by the rotating blade is retained in the mower deck, and the mowing grass is cut finely. There is known a mower that is configured so as to be able to reveal a mulching form to be performed and a side discharge form in which cut grass cut by a rotating blade is discharged from a side portion of the moor deck.

JP 2003-125626 A (see FIG. 2 and paragraph number “0026”) Japanese Patent Laying-Open No. 2005-253387 (see FIG. 7)

  When a structure in which a blowout prevention plate and a shredding baffle are attached and detached as in the conventional mower disclosed in Patent Documents 1 and 2, for example, when a side discharge type work is performed, the blowout removed from the mower deck is used. It was necessary to store the prevention plates and shredding baffles in the lawn mower driver's seat and warehouse. Therefore, when changing the work form from the side discharge form to the mulching form, it is necessary to carry the blow-off prevention plate and shredding baffle stored in the driver's seat, warehouse, etc. to the mower. Problems such as inability to change the work mode and the work of attaching and detaching the blowout prevention plate and shredding baffle is poor, and if the blowout prevention plate and shredding baffle are stored in a warehouse, etc., the blowout prevention plate and shredding baffle There is a problem that the work form cannot be changed even if the work form is changed.

Therefore, it is conceivable to attach an opening / closing member to the mower deck when performing a side discharge type work. However, if the opening / closing member attached to the mower deck protrudes greatly from the outer surface of the mower deck, the opening / closing member may interfere with getting on the driver's seat or raising / lowering the mower. There is a risk that the member may come into contact with an obstacle or the like due to traveling of the lawn mower or the like and be damaged.
It is an object of the present invention to realize a mower capable of quickly changing the working mode between the mulching mode and the side discharge mode and preventing the loss and breakage of the opening / closing member.

[I]
(Constitution)
A first feature of the present invention is that a plurality of rotating blades that are driven to rotate about a longitudinal axis are arranged in parallel inside the mower deck, and a discharge port for discharging mowing grass cut by the rotating blades on the side of the mower deck. In the provided mower , the configuration is as follows.
The mower deck is formed in an oblong shape that is horizontally long in a plan view, and a vertical cross-sectional shape of the outer peripheral portion thereof is a curved shape that curves over the peripheral wall and the upper wall,
The discharge port is formed by cutting the horizontal end of the mower deck up and down in a straight line in the front and rear direction of the mower deck, and the shape in plan view is an arcuate shape, and the discharge port is formed with the peripheral wall of the mower deck and the upper side. Configured to open across the wall,
An open / close member movable to a closed position for closing the discharge port, and an open position for opening the discharge port away from the discharge port;
The openable / closable member is formed in an arcuate shape in plan view so that the vertical cross-sectional shape thereof is a curved shape along the vertical cross-sectional shape of the outer peripheral portion of the mower deck, and the open / close member is positioned at the closed position. And so as to cover the entire surface from above and form a part of the mower deck,
The opening / closing member is configured to be positioned along an outer surface of the mower deck in a state where the opening / closing member is positioned at the open position .

(Function)
According to the first feature of the present invention, the opening / closing member can be opened and closed by moving the opening / closing member by providing an opening / closing member that is movable to a closed position that closes the discharge port and an open position that opens the discharge port away from the discharge port. Thus, it is possible to change the working mode between the mulching mode (opening / closing member is closed) and the side discharge mode (opening / closing member is open). That is, the working mode can be changed by moving the opening / closing member between the open position and the closed position. Therefore, the opening / closing member in the side discharge form can be stored by being attached to the mower deck without storing it in the driver's seat or warehouse.

According to a first aspect of the present invention, by which is located along the outer surface of the mower deck in a state where the closing member is positioned at the open position, it can be placed not let protrude greatly closing member to the open position from the outer surface of the mower deck .

(The invention's effect)
According to the first feature of the present invention, the opening / closing member in the side discharge form can be stored in the moor deck without being stored in the driver's seat or the warehouse, so that the opening / closing member can be removed from the moor deck to another place. (For example, it is not necessary to store in a driver's seat or a warehouse, etc., and the work mode can be changed quickly at the work site, and the workability of the work mode change work can be improved. The loss of the opening / closing member can be prevented.

According to the first feature of the present invention , since the opening / closing member in the open position can be arranged without projecting greatly from the outer surface of the mower deck, it becomes an obstacle when the opening / closing member gets on the driver's seat or lifts and lowers the mower. This makes it difficult for the opening / closing member to come into contact with an obstacle or the like, thereby preventing the opening / closing member from being damaged.
[II]
(Constitution)
The second feature of the present invention resides in the following configuration in the mower of the first feature of the present invention.
The opening / closing member is configured to be positioned on the rear side of the mower deck in a state where the opening / closing member is positioned in the open position.

[III]
(Constitution)
The third feature of the present invention resides in the following configuration in the mower of the first feature or the second feature of the present invention.
A moving mechanism is provided that can move the open / close member to the closed position and the open position.

(Function)
According to the third feature of the present invention, the “action” described in the preceding item [I] is provided in the same manner as the first feature of the present invention, and in addition to this, the following “action” is provided.
For example, in the conventional mowers disclosed in Patent Documents 1 and 2, the blowout prevention plate and the shredding baffle are configured to be detachable with bolts. For this reason, it takes time to align and attach / detach the blowout prevention plate and the shredding baffle, so that the workability of the attachment / detachment work is poor and it takes time to change the work form.

According to the third feature of the present invention, by providing a moving mechanism that can move the opening and closing member to the closed position and the open position, for example, compared to a case in which the opening and closing member is configured to be detachable with a bolt or the like. For example, the opening / closing member can be easily aligned and the opening / closing member can be opened / closed by an open position and a closed position by a sliding or swinging movement mechanism.

(The invention's effect)
According to the third feature of the present invention, the “effect of the invention” described in the preceding item [I] is provided in the same manner as the first feature of the present invention. In addition, the following “effect of the invention” is provided. ing.
According to the third feature of the present invention, the moving mechanism facilitates the positioning of the opening / closing member and the opening / closing of the opening / closing member, so that the workability of the work change operation can be improved.

[IV]
(Constitution)
A fourth feature of the present invention resides in the following configuration in the mower of the third feature of the present invention.
The moving mechanism is configured such that the opening / closing member moves along the peripheral wall and the upper wall of the mower deck to the closed position and the open position .

(Function)
According to the fourth feature of the present invention, the “action” described in the previous section [III] is provided in the same manner as the third feature of the present invention. In addition, the following “action” is provided.
For example, it is conceivable to configure a moving mechanism that can move the opening / closing member to the open position and the closed position by swinging the opening / closing member. However, with this configuration, it is necessary to secure a wide space near the discharge port of the mower deck that swings the opening / closing member. Therefore, for example, there is a problem that the arrangement of devices at a position where the opening / closing member is swung is restricted, and there is a problem that the opening / closing member cannot be swung if there is an obstacle or the like at a position where the opening / closing member is moved.

According to a fourth aspect of the present invention, from the closing member constituting the moving mechanism to move along the peripheral wall and the upper wall of the mower deck, longitudinal section of the closing member which longitudinal section is configured to be a curved shape The opening / closing member can be moved to the open position and the closed position by moving along the outer peripheral surface of the outer peripheral portion of the mower deck configured to have a curved shape . Therefore, it is not necessary to secure a wide space near the outlet of the mower deck that moves the opening and closing member.

(The invention's effect)
According to the fourth feature of the present invention, the “effect of the invention” described in the previous section [III] is provided in the same manner as the third feature of the present invention. In addition, the following “effect of the invention” is provided. ing.
According to the fourth feature of the present invention, it is not necessary to secure a wide space near the discharge port of the mower deck for moving the opening / closing member, so that the arrangement of devices at the position for moving the opening / closing member is less restricted. The opening / closing member can be moved without difficulty.

[Overall configuration of riding lawn mower]
FIG. 1 is an overall side view of a riding lawn mower equipped with a mower M according to the present invention, and FIG. 3 is an overall plan view of the mower M according to the present invention. 2 shows an overall side view of the riding lawn mower with the grass collector 28 attached to the rear of the riding lawn mower, and FIG. 4 shows a cross-sectional plan view of the mower M according to the present invention. FIG. 5 shows a perspective view of the moor deck 7 in an inverted state as viewed obliquely from the left rear.

  As shown in FIG. 1, this riding lawn mower has a mower M connected to a lower abdomen of a traveling machine body 3 that includes a front wheel 1 that is steered and a rear wheel 2 that is driven so as not to be steered. 4 is suspended and connected so as to be movable up and down in parallel. A vertical engine 5 is mounted on the front part of the traveling machine body 3, and the vertical rotational power extracted from the output shaft 6 projecting downward from the engine 5 is used as a transmission case 27 equipped with the rear wheel 2. Each belt is transmitted to the mower M.

  As shown in FIGS. 3 to 5, the mower M is formed by a mower deck 7 which is formed in a horizontally long oval shape in plan view and has a bowl-like cross-sectional shape. 9 has a twin blade structure mounted in parallel on the left and right, and the rotating blades 8 and 9 are connected to the lower ends of the drive shafts 10 and 11 that are mounted to the left and right of the upper surface of the moor deck 7. (Rotating blades 8 and 9 have cutting blades 8a and 9a formed on one side of both ends of a strip-shaped steel plate material, and wind-up blades 8b and 9b are folded and formed on the other side of both ends. Yes.)

  An input shaft 12 is provided at the left and right center rear portions on the upper surface of the mower deck 7, and a drive belt extends across an input pulley 13 attached to the input shaft 12 and an output pulley 14 attached to the output shaft 6 of the engine 5. 15 is wound and stretched. A drive belt 16 attached to the input shaft 12; transmission pulleys 17 and 18 attached to the drive shafts 10 and 11; guide pulleys 19 and 19 provided on the mower deck 7; 21 is wound and stretched so that both rotary blades 8 and 9 are driven to rotate in opposite directions. The rotational directions of the rotary blades 8 and 9 are set so that the rotational trajectories of the tips of the rotary blades 8 and 9 face each other inward at the rear of the machine body from the rotational axes P1 and P2.

  The mower M is provided with a slight inclination so that the rotational axis P1 of the rotary blade 8 on the left side of the machine body is positioned in front of the rotational axis P2 of the rotary blade 9 on the right side of the machine body in plan view. , 9 is configured so that no remnant is generated between the rotary blades 8 and 9 by slightly overlapping the tip rotation trajectory of the front and rear.

  A front vacuum plate 22 and a rear vacuum plate 23 having a mountain shape are attached to the front central portion and the rear central portion inside the mower deck 7, and a substantially circular cut along the tip rotation locus of the rotary blades 8 and 9 is mounted. Chambers 24 and 25 are formed for each of the rotating blades 8 and 9. The tops of the front vacuum plate 22 and the rear vacuum plate 23 are opposed to each other with a space therebetween, and an opening 26 is formed between the cutting chambers 24 and 25 to allow the grass to flow through.

  As shown in FIG. 2, this riding-type lawn mower is configured such that a grass collector 28 is detachably attached to the rear portion thereof, and the grass that has been cut by the rotary blades 8 and 9 is collected in the grass collection mode described later. It is configured to be stored and collected by being conveyed to a grass collector 28 provided at the rear of the vehicle body via a duct 48 and a bellows duct 49.

  A detachable attachment frame 29 is extended rearward from the rear portion of the riding lawn mower, and a grass collector 28 is detachably attached to the attachment frame 29 from the rear. The grass collector 28 is provided with a connection port 28a for connecting the bellows duct 49 at an upper portion thereof, and a collection portion 28b for collecting the grass is detachably provided at the lower portion thereof. By removing the collection unit 28b from the grass collector 28, the mowing grass collected in the collection unit 28b can be taken out of the vehicle.

  The detailed structure of the grass collecting duct 48 will be described later. With the grass collecting duct 48 connected to the mower M, the grass collecting duct 48 spans the rear end portion of the grass collecting duct 48 and the connection port 28a above the grass collecting machine 28 described above. By attaching a bellows duct 49 that can be expanded and contracted, the grass cut by the mower M can be conveyed to the grass collector 28.

[Detailed structure of moore deck]
The detailed structure of the mower deck 7 will be described with reference to FIGS. FIG. 6 shows a plan view of the mower M in a side discharge configuration to be described later, and FIG. 7 shows a plan view of the mower M in a mowing grass recovery configuration to be described later.

  As shown in FIGS. 3 to 7, the mower deck 7 is formed into a curved shape having an oval shape in plan view and a bowl shape in cross section, and is cut by the rotating blades 8 and 9 in a mulching form to be described later. The cut grass is retained in the mower deck 7 and can be chopped into pieces, and the steel plate is press-formed into a shape that can ensure the strength of the mower deck 7.

  The edge 7a at the lower end of the mower deck 7 is opened upward with a cross-sectional shape that is bent outward and bent upward over the entire circumference excluding the lower portion of the discharge port 7b and a mounting portion of the reinforcing plate 30 described later. It is integrally formed in a U-shape and is configured to ensure the strength of the lower end of the mower deck 7.

  A discharge port 7 b that opens to the right of the vehicle body is formed on the right side of the moor deck 7. The shape of the discharge port 7b in a plan view is formed in a semicircular arc shape obtained by cutting the mower deck 7 up and down in a straight line, and has a position and shape that can guide the mowing grass toward the diagonally right rear of the mower deck 7. Is set. In this way, by forming the mower deck 7 into a shape that is cut in a straight line in plan view, a wide opening area of the discharge port 7b can be secured, and the discharge of cut grass in the side discharge mode and the cut grass collection mode described later is performed. Performance can be improved.

  The discharge port 7b of the mower deck 7 is processed into the mower deck 7 in a state in which an edge portion 7a having an L-shaped cross section formed integrally with the mower deck 7 is left. Therefore, for example, in order to form the discharge port 7b of the mower deck 7, it is not necessary to provide the edge portion 7a as a separate part as compared with the case where the edge portion 7a is cut to the edge portion 7a and the edge portion 7a is separately fixed by welding or the like. Thus, the number of parts can be reduced, and the number of assembling steps can be reduced because a welding operation or the like for fixing the separately manufactured edge portion 7a to the mower deck 7 is not necessary. Therefore, the structure of the mower deck 7 can be simplified, and the manufacturing cost can be reduced.

  As described above, the shape of the edge portion 7a of the mower deck 7 at the lower portion of the discharge port 7b is L-shaped in cross section, so that the strength at the edge portion 7a is ensured even if the discharge port 7b is formed. be able to. Therefore, the structure of the edge part 7a located in the lower part of the discharge port 7b can be simplified, and manufacturing cost can be reduced.

  Further, the edge portion 7a formed in an L-shape serves as a guide when the slide cover 37 described later is slid and when the grass collection duct 48 described later is attached. Can be easily attached, and the workability of the work mode switching work described later can be improved.

  As shown in FIG. 11, since the gap (W in FIG. 9) between the tip of the rotating blade 9 and the inner surface side of the edge 7a of the mower deck 7 is set to a small size, the rotation of the rotating blades 8 and 9 Thus, the amount of air that escapes from the gap can be reduced, and the suction force that winds the grass up can be improved.

  A blade mounting portion 7c, which is press-molded into a shape protruding upward, is formed at the central portion on the upper surface side of the mower deck 7, and a plurality of mounting holes are formed in the blade mounting portion 7c. Thus, the strength of the blade mounting portion 7c to which the blades 8 and 9 are mounted can be secured by forming the blade mounting portion 7c into a protruding shape.

  As shown in FIG. 5, a belt-shaped reinforcing plate 30 formed in a shape matching the edge 7 a of the mower deck 7 from below the mower deck 7 is detachably fixed, and the rider mold with the mower M lowered. The lawn mower is run to prevent the edge 7a of the mower deck 7 from coming into contact with a stone or the like and breakage. Further, the strength of the edge 7a of the mower deck 7 is further improved, and the reinforcing plate 30 is provided. It is configured so that it can be replaced if damaged.

[Detailed structure of swing cover]
As shown in FIG. 3, a swing cover 31 is attached to the right side of the mower deck 7 so as to be swingable up and down around a longitudinal axis P3. When the vehicle is run down and rotated while rotating the rotary blades 8 and 9, the grass cut in the mower deck 7 can be discharged diagonally to the right of the mower deck 7 (see FIG. 9).

  The swing cover 31 is formed by bending a flat plate into a U-shape with the cross-sectional shape in the front-rear direction opened downward, and the connection portion 31a and the discharge portion 31b are opened below the swing cover 31, respectively. It is configured in the shape. The shape of the connecting portion 31a with the mower deck 7 located on the inner side of the swing cover 31 is a straight line in plan view, and the cross-sectional shape opens downwardly according to the shape of the discharge port 7b of the mower deck 7. The outer discharge portion 31b is formed in a U shape that is curved outwardly in a plan view and has a sectional shape that opens downward.

  The upper surface side of the swing cover 31 is tapered so as to be inclined downward from the inner connection portion 31a toward the outer discharge portion 31b. The cut grass is shaped so that it is difficult to wind it up.

  A bracket 32 is fixed above the discharge port 7 b of the mower deck 7, and a pair of front and rear arms fixed to the bracket 32 and the swing cover 31 are connected by pins 34, and the swing cover 31 is connected to the pins 34. It is configured to be swingable up and down around the axis P3. A torsion spring 35 is provided between the mower deck 7 and the swing cover 31. When the swing cover 31 is pressed downward by the urging force of the torsion spring 35, the swing cover 31 runs the riding lawn mower. It is configured so that it is difficult to move up and down.

  By configuring the swing cover 31 as described above, when the swing cover 31 is swung downward, the state in which the swing cover 31 is lowered by the weight of the swing cover 31 is maintained, and the mower deck 7 is discharged. The mowing grass discharged from the outlet 7b can be guided to the right rear side of the riding lawn mower.

[Detailed structure of slide cover]
The detailed structure of the slide cover 37, which is an example of an opening / closing member, will be described with reference to FIGS. 3, 4, and 6 to 11. FIG. 8 shows a right side view in a closed position where the slide cover 37 is closed and the discharge port 7b is closed, and FIG. 9 shows a right side view in an open position where the slide cover 37 is opened and the discharge port 7b is opened. 10 shows a right side view in a state where the slide cover 37 is opened, the discharge port 7b is opened and the grass collecting duct 48 is attached, and FIG. 11 shows a longitudinal rear view of the slide structure of the slide cover 37.

  As shown in FIG. 11, a pulley holder 38 is fastened and fixed to a blade mounting portion 7 c provided on the upper surface side of the mower deck 7, and the drive shaft 11 is rotatable on the pulley holder 38 via a pair of upper and lower bearings 39. Is attached. When the rotary blade 9 is fastened and fixed to the lower end portion of the drive shaft 11 and the transmission pulley 18 is fastened and fixed to the upper end portion of the drive shaft 11 from above, and the transmission pulley 18 rotates via the transmission belt 21, the rotary blade 9 is configured to rotate.

  A concave groove 38a is integrally formed on the outer peripheral portion of the upper end portion of the pulley holder 38, and a ring-like shape is formed in the groove 38a in a state where the rotary arm 40 is fitted and mounted from above the pulley holder 38. Is attached to the pulley holder 38 so as to be relatively rotatable with respect to the pulley holder 38 in a state where movement in the vertical direction is restricted, and the rotary arm 40 is rotated around the axis P2 of the rotary blade 9. It is configured to swing back and forth.

  The pulley holder 38, the drive shaft 11 and the like are covered with a curved conical guide plate 36, and in a mulching form to be described later, the grass cut up by the wind-generating blade 9b at the tip of the rotary blade 9 is cut into the cutting chamber. 25 so that the mowed grass can flow efficiently in the vicinity of the pulley holder 38 and the drive shaft 11 and the flow of the mowed grass is not hindered.

  As shown in FIGS. 3, 8 and 11, the slide cover 37 is formed in a shape capable of covering the exhaust port 7 b of the moor deck 7 over the entire surface from above, and a flat plate is formed on the outer surface side of the exhaust port 7 b. It is configured by press molding into a shape that is curved up and down according to the shape.

  As shown in FIG. 11, a bracket 42 is fixed to the upper end portion of the slide cover 37, and a strip-shaped plate spring 43 is provided between the bracket 42 and the rotary arm 40 described above, so that the plate spring 43 and the rotary arm are provided. A slide cover 37 is supported via 40 around the axis P2 of the rotary blade 9 so as to be swingable back and forth. As described above, the rotary arm 40, the bracket 42, the leaf spring 43, and the like constitute a moving mechanism that slides the slide cover 37 to the closed position and the open position along the outer peripheral surface of the mower deck 7.

  In a state where the slide cover 37 is not opened and closed, the leaf spring 43 is configured such that a reaction force of the leaf spring 43 acts so as to press the slide cover 37 against the outer peripheral surface of the mower deck 7. The slide cover 37 is separated from the outer surface of the moor deck 7 by being pushed up slightly by hand against the reaction force 43, and the slide cover 37 can be slid.

  The lower end edge of the slide cover 37 is mounted along the L-shaped edge portion 7a of the mower deck 7 described above, and the air in the mower deck 7 leaks from the discharge port 7b with the slide cover 37 closed. It is difficult and the slide cover 37 can be easily slid along the edge 7a of the moor deck 7.

  As shown in FIGS. 8 and 9, an L-shaped hook 44 provided with an engagement hole 44 a is fixed to the front end portion and the rear end portion of the discharge port 7 b of the mower deck 7. A plate 45 provided with a projecting piece 45a to be engaged with the engagement hole 44a of the hook 44 is fixed to the front end portion of the slide cover 37, and the L-shaped hook 44 is engaged to the rear end portion of the slide cover 37. A latch 46 provided with a claw portion 46a to be joined is fixed.

  In a state where the slide cover 37 is closed from the state in which the slide cover 37 is opened (the state shown in FIG. 9), the convex piece 45a of the plate 45 is engaged with the engagement hole 44a of the hook 44 and the front end portion of the slide cover 37 is held. When the claw portion 46a of the latch 46 is engaged with the L-shaped hook 44 and the operation portion 46b of the latch 46 is tilted forward, the slide cover 37 is fixed in the closed state (the state shown in FIG. 8). It is configured.

  As shown in FIG. 4, the outer periphery of the mower deck 7 located at the left end of the slide cover 37 with the slide cover 37 opened also has the same shape as the hooks 44 provided at the front and rear ends of the discharge port 7b described above. With the hook 44 fixed, the claw portion 46a of the latch 46 located on the rear side of the center portion of the mower deck 7 is engaged with the L-shaped hook 44 with the slide cover 37 opened, and the operation portion of the latch 46 is engaged. When 46b is tilted to the right, it can be fixed to the mower deck 7 with the slide cover 37 opened.

  As described above, the hook 44 is configured to be able to be fixed in the opened and closed state by the hook 44, the plate 45, and the latch 46, whereby the hook 44 is engaged with the convex piece 45a of the plate 45. It can also be used as a metal fitting for engaging the latch 46 while functioning as. Therefore, the structure for fixing the slide cover 37 can be simplified, the number of parts can be reduced, and the manufacturing cost can be reduced.

  Further, by operating the latch 46 with the plate 45 engaged with the hook 44, the slide cover 37 can be easily and quickly fixed in the open state and the closed state, so that switching between the mulching mode and the side discharge mode is possible. Can be performed easily and quickly, and the workability of the work mode switching work can be improved.

  The slide cover 37 is configured as described above, and after the slide cover 37 is opened and the discharge port 7b is opened, the latch 46 is released, and the slide cover 37 is pushed up a little to slide forward. By operating the latch 46 by engaging 45 with the hook 46, the slide cover 37 can be closed and the discharge port 7b can be closed. Further, from the state where the slide cover 37 is closed and the discharge port 7b is closed, the latch 46 is released, the engagement between the plate 45 and the hook 44 is released, the slide cover 37 is pushed up a little and slid backward to latch. By operating 46, the slide cover 37 can be opened to open the discharge port 7b.

[Detailed structure of grass collection duct]
As shown in FIGS. 7 and 10, the grass collecting duct 48 includes a connecting portion 48 a to the mower deck 7 located at the front portion, and a pipe portion 48 b extending obliquely upward and rearward from the connecting portion 48 a. It is configured in an integrally molded shape.

  The connecting portion 48 a of the grass collecting duct 48 is formed in a shape that can cover the discharge port 7 b of the mower deck 7 from the outside in accordance with the shape of the mower deck 7. The shape of the connecting portion 48a in a plan view is formed into a shape that is smoothly curved obliquely rearward along the tangent L of the outer peripheral surface of the moor deck 7 at the position where the front side hook 44 is provided. It is configured so that the mowing grass cut by 8, 9 can be guided to the rear grass collector without difficulty.

  The pipe portion 48b of the grass collection duct 48 is formed in a cylindrical shape and is integrally formed with the connection portion 48a described above, and obliquely rearward from the rear end portion of the connection portion 28a toward the connection port 28a of the grass collector 28. It is formed in a shape that is curved upward. The shape of the rear end portion of the pipe portion 48b is set to an outer diameter that allows the bellows duct 49 to be fitted without a gap, and air is leaked from the connecting portion between the pipe portion 48b and the bellows duct 49, so that the conveying ability of the cut grass Is configured so as not to decrease.

  The latch 46 and the plate 45, which are the same as the latch 46 and the plate 45 attached to the slide cover 37, are fixed to the front end portion and the rear end portion of the connection portion 48a of the grass collecting duct 48, respectively. Is engaged with the engaging hole 44a of the hook 44 on the rear side of the discharge port 7b and the latch 46 is operated, so that the grass collecting duct 48 can be fixed to the mower deck 7. As described above, the grass collection duct 48 is configured to be detachable from the mower deck 7 with the plate 45 and the latch 46, so that, for example, the grass collection duct 48 is fixed to the mower deck 7 with bolts or the like (not shown). The grass collection duct 48 can be easily and quickly attached / detached without using a tool or the like (not shown) for attaching / detaching the grass collection duct 48, and the workability of the grass collection duct 48 can be improved. Can do.

  The latch 44 and the plate 45 for fixing the grass collecting duct 48 to the mower deck 7 are the same as the latch 46 and the plate 45 for fixing the slide cover 37, so that the hook 44 fixed to the mower deck 7 side is used. Can also be used as a metal fitting when the grass collecting duct 48 is attached to the mower deck 7. Therefore, the number of parts can be reduced and the manufacturing cost can be reduced as compared with a case where a metal fitting for attaching the grass collecting duct 48 to the mower deck 7 is separately provided.

  As described above, the grass collecting duct 48 is configured, the slide cover 37 is opened, the discharge port 7b of the mower deck 7 is opened, and the rocking cover 31 is swung upward. The latch 45 of the front end portion of the grass collection duct 48 is held in a state where the convex piece 45a of the plate 45 is engaged with the engagement hole 44a of the hook 44 on the rear side of the discharge port 7b to hold the rear end portion of the grass collection duct 48. The grass collecting duct 48 can be fixed to the mower deck 7 by engaging the claw portion 46a with the hook 44 on the front side of the discharge port 7b and tilting the operation portion 46b of the latch 46 backward.

  The front end portion of the bellows duct 49 is fitted on the rear end portion of the pipe portion 48b constituting the grass collecting duct 48 fixed to the mower deck 7, and is fastened and fixed by a band (not shown), and the rear end portion of the bellows duct 49 is secured. Is fastened with a band to the connection port 28a of the grass collector 28, so that the discharge port 7b of the mower deck 7 and the connection port 28a of the grass collector 28 can be connected, and a mowing collection form described later appears. be able to.

[Work form of riding lawn mower]
Based on FIGS. 3, 6, 7, and 8 to 10, three working modes that can appear with this riding lawn mower will be described.

  As shown in FIGS. 3 and 8, with the swing cover 31 swinging upward, the slide cover 37 is slid forward to close the discharge port 7b, and the swing cover 31 swings downward. By doing so, the mulching form can be revealed. With this mulching configuration, the mowing grass cut by the rotating blades 8 and 9 can stay in the mower deck 7 and be cut into pieces.

  As shown in FIGS. 6 and 9, the side discharge mode can be realized by sliding the slide cover 37 backward to open the discharge port 7b and swinging the swing cover 31 downward. With this side discharge mode, the grass cut by the rotary blades 8 and 9 can be discharged from the mower deck 7 to the right rear outside the vehicle.

  7 and 10, the swing cover 31 is swung upward, the slide cover 37 is slid rearward to open the discharge port 7b, and the grass collecting duct 48 is fixed to the discharge port 7b. Furthermore, a cutting and collecting form can be realized by attaching a bellows duct 49 across the grass collecting duct 48 and the grass collecting machine 28. According to this cutting and collecting form, the cut grass cut by the rotary blades 8 and 9 can be conveyed to the rear grass collector 28 and recovered in the collecting portion 28b below the grass collector 28.

  As described above, the swing cover 31, the slide cover 37, and the grass collecting duct 48 are configured, and the three working modes of the mulching mode, the side discharge mode, and the cut grass collecting mode are configured so as to be able to appear. Not only can the work mode be switched easily and quickly, but also the work mode between the mulching mode and the side discharge mode can be switched without removing parts such as the slide cover 37 and the swing cover 31 from the mower deck 7. it can.

  Therefore, compared with the case where the parts (slide cover 37, swinging cover 31, etc.) necessary for switching the work form are stored in a warehouse or the like and prepared each time, as needed at the site where the cutting operation is performed. The work mode can be changed, and the workability of the mowing work and the preparation work can be improved.

[First Alternative Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], the example in which the discharge port 7b of the mower deck 7 is formed by integrally forming the edge portion 7a with the mower deck 7 has been shown, but as shown in FIG. Even if the lower part of the discharge port 7b of the moor deck 7 is formed into an open shape, the separately produced guide members 51 corresponding to the edge portion 7a are fixed to both sides of the discharge port 7b to form the discharge port 7b. Good.

  As shown in FIG. 12, the guide member 51 has a U-shaped cross-section, and the U-shaped member is bent in accordance with the arc shape of the outer periphery of the moor deck 7. It is bent into a different shape. The plate thickness of the guide member 51 is set to be greater than the plate thickness of the mower deck 7, and is configured to improve the strength of the guide member 51 in a state of being attached to the mower deck 7.

  Thus, by forming the cross-sectional shape of the guide member 51 in a U shape, the strength of the guide member 51 located at the lower portion of the discharge port 7b can be improved, and the grass collecting duct 48 and the like are stably supported. The moor deck 7 can be realized that is difficult to break.

  The guide member 51 has a front end portion and a rear end portion fixed to both side portions of the discharge port 7b of the mower deck 7, and is aligned with the edge portion 7a of the mower deck 7 so that the slide cover 37 can be slid without difficulty. It is fixed.

  By configuring the guide member 51 in this way, the strength of the lower portion of the discharge port 7b of the mower deck 7 can be improved, and the mower deck 7 having excellent durability can be realized.

  Further, the upper end of the inner side of the guide member 51 formed in a U-shape (the lower end of the discharge port 7b) is positioned above the lower surface side of the rotary blade 9, and the vertical direction of the guide member 51 and the rotary blade 9 is determined. The shape and the like of the guide member 51 and the discharge port 7b are configured so that the positional relationships of (H in FIG. 12) overlap. By comprising in this way, the fall of the suction | attraction force which winds up a mowing grass by rotation of the rotary blades 8 and 9 by providing the discharge port 7b can be prevented.

[Second Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] and [First Alternative Embodiment of the Invention], an example in which the three working modes of the mulching mode, the side discharge mode, and the mowing grass recovery mode are configured to appear. However, the present invention can be similarly applied to a riding-type lawn mower configured so that two working forms, a mulching form and a side discharge form, can be displayed.

[Third Another Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], [First Alternative Embodiment of the Invention] and [Second Alternative Embodiment of the Invention], the slide cover 37 which is an example of an opening / closing member is attached to the moor deck 7. Although the example in which the discharge port 7b of the mower deck 7 is configured to be openable and closable by being slid along the outer peripheral surface of the open / closed member is shown, for example, the open / close member is configured to be detachable so as to be movable to the open position and the closed position The opening / closing member may be configured to be swingable so as to be movable to the open position and the closed position.

  In the above-mentioned [Best Mode for Carrying Out the Invention], [First Alternative Embodiment of the Invention] and [Second Alternative Embodiment of the Invention], the slide cover 37 of the mower deck 7 is moved by the rotary arm 40 or the like. Although an example in which the moving mechanism is configured to move along the outer peripheral surface has been shown, a different mechanism may be employed as the moving mechanism for moving the slide cover 37 along the outer peripheral surface of the mower deck 7, for example, a slide cover A slide rail (not shown) may be provided at the upper end and the lower end of 37, and the moving mechanism may be configured so that the slide cover 37 moves along the slide rail.

[Fourth Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], [First Alternative Embodiment], [Second Alternative Embodiment] and [Third Alternative Embodiment], Moore An example of a riding lawn mower adopting a twin blade structure equipped with two rotating blades 8 and 9 in M is shown as an example. However, as disclosed in Patent Document 2, three blades ( The present invention can be similarly applied to a riding lawn mower adopting a triple blade structure equipped with a not-shown).

  In the above-mentioned [Best Mode for Carrying Out the Invention], [First Alternative Embodiment], [Second Alternative Embodiment] and [Third Alternative Embodiment], the front wheel An example of a riding lawn mower with a mower M connected to the lower abdomen between 1 and the rear wheel 2 (so-called zero-turn mower) is shown, but a riding mower with a mower M connected to the front of the front wheel 1 ( The same applies to a so-called front mower (not shown). Further, the present invention is not limited to the riding-type lawn mower but can be similarly applied to the mower M of the walking-type lawn mower.

Overall left side view of riding lawn mower Overall left side view of the riding lawn mower with the grass collector installed Overall plan view of mower in mulching form Moor's transverse plan view in mulching form Perspective view showing the structure of the mower deck Plan view of right side of mower in side discharge mode Plan view of mower right side in cut grass collection form Right side view of mower in closed position with slide cover closed Right side view of mower in open position with slide cover open Right side view of mower in cut and harvest form Longitudinal rear view showing open / close structure of slide cover A longitudinal rear view of a mower in a first alternative embodiment of the invention

7 Moor deck 7a Discharge port 8 Rotating blade 9 Rotating blade 37 Slide cover (opening / closing member)
M Moore

Claims (4)

In the mower that has a plurality of rotating blades that are driven to rotate around the longitudinal axis in the mower deck in parallel, and that has a discharge port that discharges the mowing grass cut by the rotating blades on the side of the mower deck,
The mower deck is formed in an oblong shape that is horizontally long in a plan view, and a vertical cross-sectional shape of the outer peripheral portion thereof is a curved shape that curves over the peripheral wall and the upper wall,
The discharge port is formed by cutting the horizontal end of the mower deck up and down in a straight line in the front and rear direction of the mower deck, and the shape in plan view is an arcuate shape, and the discharge port is formed with the peripheral wall of the mower deck and the upper side. Configured to open across the wall,
An open / close member movable to a closed position for closing the discharge port, and an open position for opening the discharge port away from the discharge port;
The openable / closable member is formed in an arcuate shape in plan view so that the vertical cross-sectional shape thereof is a curved shape along the vertical cross-sectional shape of the outer peripheral portion of the mower deck, and the open / close member is positioned at the closed position. And so as to cover the entire surface from above and form a part of the mower deck,
The mower configured to be positioned along the outer surface of the mower deck in a state where the opening and closing member is positioned at the open position . The mower according to claim 1 , wherein the mower is configured to be located on the rear side of the mower deck in a state where the opening / closing member is located at the open position . Before SL mower according to claim 1 or 2, wherein the closing member are provided with a movable transfer mechanism in the closed and open positions. The mower according to claim 3, wherein the moving mechanism is configured such that the opening / closing member moves along the peripheral wall and the upper wall of the mower deck to the closed position and the open position.

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