JP2020078270A - Mower - Google Patents

Abstract

To secure an installation space for a transmission mechanism regardless of lifting and lowering operation of a mower, stabilize a position of the mower in a lateral direction and reduce risk of damage of a member.SOLUTION: A mower 4 is suspended from and supported to a travel machine body through a link mechanism 36 so that it can be lifted and lowered, and a transmission mechanism 33 is provided on an upper side of a reaping blade housing 31 and transmits power to a reaping blade 32, and vertical extension parts 31A, 31B extending upward from a top surface of the reaping blade housing 31 are erected. A front side oscillation link 37A of the link mechanism 36 has one end which is coupled to the travel machine body so as to freely oscillate, and the other end which is coupled to an upper part of the front part side vertical extension part 31A so as to freely oscillate. A rear side oscillation link 37B of the link mechanism 36 has one end which is coupled to the travel machine body so as to freely oscillate, and the other end which is coupled to an upper part of the rear part side vertical extension part 31B so as to freely oscillate.SELECTED DRAWING: Figure 1

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mower in which a mower is suspended and supported by a traveling machine body so as to be able to move up and down via a link mechanism.

  In the above-mentioned mower, conventionally, a link mechanism that supports the mower has been configured as follows. That is, swing links are provided on both front and rear sides, one end of each swing link is swingably connected to the frame of the traveling machine body, and the other end of each swing link is swingably connected to the auxiliary link. The auxiliary links are swingably connected to the cutting blade housing in the mower (see, for example, Patent Document 1).

JP, 2003-274730, A

  In the above-described conventional configuration, even when the mower is raised to the maximum lift position with respect to the traveling body, each swing link suspends and supports the cutting blade housing via the auxiliary link, so that the upper side of the cutting blade housing is supported. Creates a space. As a result, there is an advantage that it is easy to secure a space on the upper side of the cutting blade housing for installing a transmission mechanism that transmits power to the cutting blade.

  However, in the above-described conventional configuration, since the auxiliary link having the configuration in which both end portions are pivotally supported so as to be swingable is interposed between the swing link and the cutting blade housing, the pivot support connection point is provided. There is a possibility that there will be more and more rattling in the left-right direction. As a result, the position of the mower in the left-right direction with respect to the traveling body is not stable, and the traveling body side member and the mower side member come into contact with each other, and there is a disadvantage that the member is damaged due to long-term use. ..

  Therefore, it is desirable to stabilize the position of the mower in the left-right direction and reduce the risk of damage to the members, while it is possible to secure the installation space for the transmission mechanism regardless of the raising/lowering operation of the mower. It was rare.

  A characteristic configuration of a mower according to the present invention is such that a mower is suspended and supported by a traveling machine body via a link mechanism so that the mower can be moved up and down, and the mower covers a cutting blade that is rotationally driven and an upper side of the cutting blade. A blade housing and a transmission mechanism that is located above the cutting blade housing and transmits power to the cutting blade are provided, and the link mechanism includes a front swing link located on the front side of the machine body and a rear side of the machine body. And a swinging link on the rear side of the cutting blade housing, and a vertically extending portion extending upward from the upper surface of the cutting blade housing is erected at each of the front side portion and the rear side portion in the upper portion of the cutting blade housing. One end of the front swing link is swingably connected to the traveling machine body, and the other end is swingably connected to an upper portion of the vertically extending portion on the front side. One side of the side swing link is swingably connected to the traveling machine body, and the other end is swingably connected to an upper portion of the longitudinally extending portion on the rear side.

  According to the present invention, the link mechanism for supporting the mower is composed of the front swing link and the rear swing link, and since the pivotal connection point is only the end portion of each swing link, Even if used over a long period of time, there is little risk of rattling in the left-right direction. As a result, the position of the mower in the left-right direction with respect to the traveling machine body is stabilized, and the risk that the traveling machine body-side member and the mower-side member come into contact with each other is reduced.

  Since each swing link is swingably connected to the vertically extending portion extending upward from the upper surface of the cutting blade housing, the swing link is vertically extended even when the mower is raised to the maximum raised position. Since the cutting blade housing is suspended and supported via the portion, it is possible to prevent the transmission mechanism located above the cutting blade housing from interfering with the member on the machine body side.

  Therefore, it is possible to secure the installation space for the transmission mechanism regardless of the raising/lowering operation of the mower, but it is possible to stabilize the position of the mower in the left-right direction and reduce the risk of damage to members. Became.

  In the present invention, a grass collection duct for guiding the grass cut from the discharge portion of the cutting blade housing to the rear of the vehicle body, and a grass collection container for storing the grass cut guided by the grass collection duct are provided, and the discharge The bottom plate of the grass collecting duct, which is supported by the mower-side operation tool so as to be vertically swingable around the first horizontal axis, and which forms a grass cutting guide surface in connection with the bottom plate of the discharging unit, is the duct side. The bottom plate of the grass collecting duct is supported so as to be vertically swingable around the second horizontal axis by operating the operation tool, and the front end of the bottom plate of the grass collecting duct is in a cutting grass guiding state in which the front end part is continuous with the bottom plate of the discharging part, and the front end part pivots upward. It is preferable that the center of gravity is swingable between the retracted state in which the position of the center of gravity is behind the position of the second horizontal axis.

  According to this configuration, when the grass is clogged, the bottom plate of the discharge part and the bottom plate of the grass collection duct are rocked to clear the jam of the grass and perform a smooth discharge operation. When the bottom plate of the discharge part is rocked to discharge the residual grass in the discharge part at the end of work or when collecting the grass in the grass collection container, By switching the bottom plate to the retracted state, the bottom plate of the grass collection duct can maintain the retracted state by its own weight even if the hand is released from the mower-side operation tool. As a result, the bottom of the grass collection duct is opened, and the grass can be easily discharged from the discharge section.

  In the present invention, it is preferable that a gap suppressing member that pushes the side plate of the grass collection duct toward the inner side in the lateral direction is provided.

  Since the bottom plate of the grass collecting duct is swingable, the bottom plate and the side plates located on both sides in the lateral direction of the bottom plate are separated from each other. Then, the pressing force of the discharged grass may be applied, or the grass collection container may come into contact with an external object such as a convex portion of the ground or trees along with the grass cutting work, and an excessive force may be applied in the lateral direction. Due to this, the side plate may be displaced outward in the lateral direction, and the gap between the side plate and the bottom plate may be widened. When the gap is widened, there is a disadvantage that the grass is accumulated and accumulated in a lump.

  Therefore, according to this configuration, by providing the gap suppressing member, even if the above-described force acts on the side plate, the gap suppressing member pushes the side plate toward the inner side in the lateral direction. The gap between the side plate and the bottom plate can be prevented from widening, and the accumulation of grass can be easily avoided.

It is the whole mower side view. It is the whole mower top view. It is a top view of mower. It is a side view of a mower arrangement part in a grounding state. It is a vertical side view showing a discharge part and a duct in a grounded state. It is a side view of a mower arrangement part in a raised state. It is a vertical side view showing a discharge part and a duct in a raised state. It is a cross-sectional top view which shows a discharge part and a duct. It is a vertical front view of a duct. It is a perspective view which shows the cooperation structure for operation. FIG. 9 is a side view showing the second linkage mechanism when the bottom plate is in the retracted state.

Hereinafter, an example of a mode for carrying out the present invention will be described with reference to the drawings.
In addition, the front-rear direction and the left-right direction in the description of the present embodiment are described as follows unless otherwise specified. That is, the forward traveling direction (see arrow F in FIG. 1) is “forward” and the backward traveling direction (see arrow B in FIG. 1) is “forward” when the riding-type mower according to the present invention is running. "Rear", the direction corresponding to the right side (see arrow R in Fig. 2) based on the forward facing posture in the front-rear direction is "right", and the direction corresponding to the left side (see arrow L in Fig. 2) is "left". It is.

〔overall structure〕
As shown in FIGS. 1 and 2, the mowing machine is equipped with a pair of left and right steerable front wheels 2 on the front side of the traveling machine body 1 and a pair of left and right drivable rear wheels 3 on the rear side of the traveling machine body 1 for self-propelling. Is configured. A rear discharge type mower 4 is hung and supported below the vehicle body between a front wheel 2 and a rear wheel 3 in the front-rear direction so that the mower 4 can be lifted and lowered. On the rear side of the traveling machine body 1, there is provided a grass collecting container 5 as a grass collecting portion for storing the grass mowed by the mower 4.

  A prime mover 6 is provided at the front of the traveling machine body 1, and a boarding operation unit 7 is provided at the rear of the prime mover 6. In the prime mover 6, the engine 8 is mounted and supported on the machine body frame 10 in a state of being installed in the engine hood 9. The power extracted from the rear side of the engine 8 is input to a hydrostatic continuously variable transmission (HST) 12 located rearward via a transmission shaft 11 extending rearward. The output from the hydrostatic continuously variable transmission 12 is transmitted to the left and right rear axles 3a via a chain type transmission mechanism (not shown) installed in the transmission case 13 provided at the rear part and the transmission cases 14 on the left and right sides. Then, the rear wheel 3 is driven. The transmission case 14 extends obliquely rearward and downward from the lateral side portion of the transmission case 13.

  On the front side of the engine 8, a power take-out mechanism 15 configured by a belt transmission mechanism is provided, and a PTO shaft 16 provided in the power take-out mechanism 15 and a transmission mechanism 33 provided above the mower 4 are used to drive the engine 8 Is transmitted to the mower 4.

  The boarding operation unit 7 is provided with a control panel 17 connected to the rear side of the engine hood 9 and a control unit 19 including a steering wheel 18 capable of steering the front wheels 2. A driver's seat 20 is installed on the rear side of the control unit 19, and a lops 21 is provided at a rear portion of the driver's seat 20.

[Moor configuration]
As shown in FIG. 3, the mower 4 has a structure in which two blades 32 as cutting blades are arranged side by side in the cutting blade housing 31, and the left blade 32 is driven clockwise. The blade 32 on the right side is driven counterclockwise. In this way, the left blade 32 is driven in the clockwise direction and the right blade 32 is driven in the counterclockwise direction, so that the cutting grass rides on the transport wind generated by the rotation of the blades 32, and the cutting blade housing 31 moves. It is configured to be discharged rearward from a discharge portion 34 formed near the center of the rear portion. The grass clippings discharged from the discharge portion 34 are guided by a grass collecting duct 35 connected to the discharge portion 34, fed into the grass collecting container 5, and stored therein.

  As shown in FIG. 4, the mower 4 is supported by the machine body frame 10 so as to be able to move up and down via a lifting link mechanism 36. The lifting link mechanism 36 is provided with a pair of front and rear swing links 37A, 37B, one end of which is pivotally connected to the machine frame 10 at the upper end and the other end of which is pivotally connected to the cutting blade housing 31 at each of the left and right sides. ..

  A pair of left and right vertically extending portions 31A and 31B extending upward from the upper surface of the cutting blade housing 31 are provided upright on the front side portion and the rear side portion of the upper portion of the cutting blade housing 31, respectively. As shown in FIG. 3, the vertically extending portion 31A on the front side and the vertically extending portion 31B on the rear side each have a shape obtained by bending a plate body into a substantially L shape in plan view. It is integrally connected to the upper surface of the blade housing 31 by welding.

  One end of the swing link 37A on the front side is swingably connected to the body frame 10 of the traveling machine body 1 about a lateral axis, and the other end of the swing link 37A is positioned above the longitudinally extending portion 31A on the front side. It is swingably connected around the core. On the other hand, one end of the swing link 37B on the rear side is swingably connected to the machine frame 10 of the traveling machine body 1 about a lateral axis, and the other end is on the upper portion of the vertically extending portion 31B on the rear side. It is swingably connected about a lateral axis.

  As shown in FIG. 3, the vertically extending portion 31A on the front side and the vertically extending portion 31B on the rear side each have a shape obtained by bending a plate body into a substantially L shape in plan view. It is integrally connected to the upper surface of the blade housing 31 by welding. The front-side vertically extending portion 31A and the rear-side vertically extending portion 31B extend upward from the upper surface of the cutting blade housing 31 to a height substantially equal to the height of the cutting blade transmission mechanism 33. With this configuration, as shown in FIG. 6, even if the mower 4 is raised to the maximum raised position, the upper end portion of the transmission mechanism 33 corresponding to the machine body frame 10 interferes with the machine body frame 10. Therefore, a space for installing the transmission mechanism 33 on the upper side of the cutting blade housing 31 can be secured.

  The upper and lower ends of the front and rear swing links 37A and 37B are interlockingly connected by a connecting rod 38, and one end of a hydraulic cylinder 39 for raising and lowering is interlockingly connected to an operating portion 37A1 formed on the front swing link 37A. Has been done. The other end of the hydraulic cylinder 39 is pivotally connected to the body frame 10. The mower 4 can be moved up and down by expanding and contracting the hydraulic cylinder 39 to rock the rocking links 37A and 37B. In the mowing work state, the mower 4 performs the mowing traveling while following the ground contact while the gauge wheel 40 provided at the lower end of the cutting blade housing 31 is grounded.

  As shown in FIGS. 3, 4 and 5, the discharge portion 34 is formed in the rear center of the cutting blade housing 31 in the left-right direction so as to extend obliquely rearward and upward. The discharging portion 34 includes a discharging portion main body 41 integrally connected to the cutting blade housing 31, and a guide member 42 forming a bottom portion of the discharging portion main body 41. The discharge part main body 41 has a ceiling surface 41a and side surfaces 41b on both left and right sides, and is formed in an inverted U-shape when viewed in the front-rear direction. The plate-shaped guide member 42 is provided so as to cover the lower portion of the internal space formed by the discharge portion main body 41. Therefore, the discharge section main body 41 and the guide member 42 form a substantially rectangular tubular transport path extending obliquely upward and rearward. An upper guide surface 43 for guiding the grass in an upward direction is formed in the middle of conveyance of the guide member 42.

  As shown in FIGS. 8 and 10, the guide member 42 is provided around the first horizontal axis X1 with respect to the cutting blade housing 31 by the support shafts 44 that are provided over the left and right side surfaces 41b of the discharge part body 41. It is supported so that it can swing up and down. The guide member 42 is linked to a first operating lever 71 provided in the vicinity of the driver's seat 20 via the first linking mechanism 70, and the guide member 42 is rocked by manually operating the first operating lever 71. It is configured to be operable. When mowing grass is clogged at the discharging section 34 in association with the mowing operation, the first claw lever 71 is reciprocally rocked so that the mowing grass can be unclogging and conveyed.

  As shown in FIGS. 3, 5, and 8, the first linkage mechanism 70 has a left and right supporting shaft portion 72, and is supported by a right rear portion of the cutting blade housing 31 so as to be vertically swingable. A first arm 73 fixed to the left end portion of the support shaft portion 72, a second arm 74 fixed to the right end portion of the support shaft 44, and a push-pull link that links the first arm 73 and the second arm 74. 75, a tension spring 76 and the like. The action of the tension spring 76 urges the first arm 73 to swing forward and is regulated by the contact portion 77, so that the guide member 42 is held in the rearward upward guiding posture. By swinging the first operating lever 71 upward and rearward, the guide member 42 is swung in the forward upward direction from the backward upward guiding posture against the biasing force of the tension spring 76. You can

  During the mowing operation, when the discharge portion 34 is clogged with the cut grass adhered to and accumulated on the guide member 42, the driver moves the first operation lever 71 in the vertical direction while sitting on the driver's seat 20. By swinging, the guide member 42 can be swung in the vertical direction, and the attached grass can be removed.

[Grass collecting duct]
Next, the grass collecting duct 35 will be described.
As shown in FIGS. 3, 4, 5, and 8, a grass collecting duct 35 that is connected so as to communicate with the discharge portion 34 formed in the cutting blade housing 31 and that guides the cut grass fed from the discharge portion 34 is provided. Has been. As shown in FIGS. 1 and 9, the duct 35 is provided so as to extend in the front-rear direction in the space formed between the left and right transmission cases 14.

  As shown in FIGS. 5, 8 and 9, the duct 35 includes a duct body 45 and a bottom plate 46. The duct body 45 has a ceiling surface 45a and left and right side plates 46b, and is formed in an inverted U shape when viewed in the front-rear direction. A plate-shaped bottom plate 46 is provided so as to cover the lower portion of the internal space formed by the duct body 45. Therefore, similar to the discharge section 34 of the mower 4, a substantially rectangular tubular transport path extending rearward and obliquely upward is formed in the inner region surrounded by the duct body 45 and the bottom plate 46.

  As described above, the duct body 45 is formed in an inverted U shape when viewed in the front-rear direction, and the side plate may be displaced laterally outward. Therefore, a gap suppressing member SY that pushes the side plate 45b of the duct body 45 in the duct 35 toward the inner side in the lateral direction is provided. As shown in FIG. 9, the gap suppressing member SY is provided between the body frame 10 located on the lateral outer side of the duct body 45 and the side plate 45b of the duct body 45. The gap suppressing member SY includes a plurality of coil springs 23, a plate body 24 that pushes and operates the side plate 45b by the urging force of the coil springs 23, and the like. Since the side plate 45b is pushed inward in the lateral direction by the gap suppressing member SY, it is possible to prevent the side plate 45b from spreading outward.

  Supporting members 47 whose positions are fixed are provided on the outer sides of the left and right sides of the duct 35. Although not shown, the support member 47 is connected to the machine frame 10 or a member fixed to the machine frame 10 and is supported in a position-fixed state. A bottom plate 46 of the duct 35 is supported by left and right support members 47 so as to be vertically swingable around the second horizontal axis X2. That is, as shown in FIG. 8, the rotation support shaft 48 is provided in a state of being installed over the left and right support members 47. As shown in FIG. 5, left and right support arms 49 are integrally extended from the lower surface of the bottom plate 46 toward the lower rear. Boss portions 49A provided on the extended ends of the left and right support arms 49 are rotatably fitted and supported on the rotation support shaft 48.

  Then, the bottom plate 46 of the duct 35 is interlocked with the second operation lever 51 as a duct side operation tool provided on the right side of the driver's seat 20 via the second linkage mechanism 50, and the second operation lever 51 is connected. It is configured such that it can be rotated by operating it. As shown in FIGS. 6 and 10, the second operation lever 51 is rotatably supported by the lateral shaft portion 51a, and is provided with a first arm 78 that integrally rotates at the left end of the lateral shaft portion 51a. .. The second arm 79, which is connected to the rotation boss 49 a of the support arm 49, is interlockingly linked via a push-pull link 80. Therefore, when the second operation lever 51 is rocked, the bottom plate 46 rocks due to the linkage structure of the second linkage mechanism 50. As a result, similarly to the guide member 42, when the grass is jammed in the duct 35 due to the mowing operation, the second operation lever 51 can be reciprocally rocked to clear and convey the grass. it can.

  The bottom plate 46 of the duct 35 is configured such that the posture can be changed in association with the raising/lowering operation of the mower 4 in addition to the posture switching by the operation of the second operation lever 51. 6, the mower linkage mechanism 52 that interlocks and links the mower 4 and the bottom plate 46 is provided so as to change the posture of the bottom plate 46 in conjunction with the up and down movement of the mower 4. ing. The mower link mechanism 52 is provided in a state of being located on the left outer side of the duct 35.

  The mower link mechanism 52 has a push-pull link 54, one end of which is interlockingly linked to the left end of a support shaft 44 that supports the guide member 42, a fulcrum pin 55 provided on the support member 47, and a push-pull link 54. The other end of the first pivot arm 56 pivotally supported and pivotally supported by the pivot pin 55, and the first pivot arm 56 integrally pivotably supported by the pivot pin 55 and pivoted. A second swing arm 57 is provided whose end abuts against the lower surface of the bottom plate 46. The push-pull link 54 includes a turnbuckle portion 54a.

  When the mower 4 rises, the support shaft 44 rises accordingly, and the push-pull link 54 is pushed to swing the first swing arm 56 and the second swing arm 57 to move the bottom plate 46 forward. The posture is changed to the up state (see FIG. 7). When the mower 4 descends, the support shaft 44 descends, the push-pull link 54 is pulled, and the first swing arm 56 and the second swing arm 57 swing, so that the bottom plate 46 is in a front-down position. Change (see FIG. 5). As a result, it is possible to prevent the bottom plate 46 from being damaged due to the up and down movement of the mower 4, and to prevent the grass from being discharged from the gap between the guide member 42 and the bottom plate 46.

  Then, the bottom plate 46 of the duct 35 has a front end portion which is connected to the guide member 42 which is the bottom plate of the discharge portion 34 in a grass cutting guide state (a state shown in FIGS. 5 and 7) and a front end portion which pivots upward and moves to the center of gravity position G. Is swingable over a retracted state (a state shown in FIG. 11) located behind the second horizontal axis X2 position. That is, as shown in FIG. 11, when the bottom plate 46 is swung to the retracted state, the bottom plate 46 becomes a state in which the turning biasing force acts on the side (rear side) opposite to the grass cutting guide state by its own weight. The position can be maintained in that posture even when the hand is released from the second operation lever 51.

  When the grass mowing work is completed and the cut grass remaining inside the discharge part 34 is discharged outward, the bottom plate 46 of the duct 35 is switched to the retracted state to open the bottom part, and the discharge part 34 is discharged. By swinging the guide member 42, it can be easily discharged.

[Another embodiment]
(1) In the above-described embodiment, the gap suppressing member that pushes the side plate 46b of the duct 35 toward the inner side in the lateral direction is provided. However, such a member may not be provided.

(2) In the above-described embodiment, the bottom plate 46 of the duct 35 is provided such that the front end portion is rotated upward and the position of the center of gravity is switchable to the retracted state in which the position of the center of gravity is located on the rear side of the second horizontal axis position. Although shown, instead of this configuration, the bottom plate 46 of the duct 35 may always return to the grass cutting guide state when the second operation lever 51 is released.

(3) In the above embodiment, the mower 4 is moved up and down by operating the hydraulic cylinder 39. However, instead of this structure, for example, for moving up and down a rear working device mounted on the rear part of the machine body. As long as it has a lift arm, it may be configured to be linked with a link mechanism so as to move the mower up and down as the lift arm is moved up and down.

(4) The mower may be configured as a semi-crawler type having left and right crawlers instead of the left and right rear wheels 3. Further, it may be configured to have an electric specification including an electric motor instead of the engine, or may be configured to have a hybrid specification including the engine 9 and an electric motor. Further, the mower may be provided with an automatic driving system so as to be able to run automatically.

(5) The mower 4 may have a single blade 32 or three or more blades 32, or may have a disk-shaped cutting blade instead of the blade 32.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a mower in which a mower is suspended and supported by a traveling machine body so as to be able to move up and down via a link mechanism.

4 Mowers 5 Grass container 31 Cutting blade housing 31A Front side vertically extending portion 31B Rear side vertically extending portion 32 Blade (cutting blade)
33 transmission mechanism 34 discharge part 35 grass collection duct 36 link mechanism 37A front swing link 37B rear swing link 42 guide member (bottom plate)
45b Side plate 46 Bottom plate 51 Second operation lever (duct side operation tool)
71 1st operation lever (Mower side operation tool)
G center of gravity position SY gap suppressing member X1 first horizontal axis X2 second horizontal axis

Claims (3)

The mower is suspended and supported on the traveling machine via a link mechanism so that it can be raised and lowered.
The mower is provided with a cutting blade that is driven to rotate, a cutting blade housing that covers an upper side of the cutting blade, and a transmission mechanism that is located above the cutting blade housing and that transmits power to the cutting blade.
The link mechanism includes a front swing link located on the front side of the machine body, and a rear swing link located on the rear side of the machine body,
At each of the front side portion and the rear side portion in the upper portion of the cutting blade housing, a vertically extending portion extending upward from the upper surface of the cutting blade housing is erected.
The swing link on the front side is swingably connected to the traveling machine body at one end, and swingably connected to the upper portion of the vertically extending portion on the front side at the other end.
One end of the rear swing link is swingably connected to the traveling machine body, and the other end is swingably connected to an upper portion of the rearward-extending vertically extending portion. A grass collecting duct for guiding the grass cut from the discharge portion of the cutting blade housing to the rear of the vehicle body, and a grass container for storing the grass cut guided by the grass collecting duct are provided.
The bottom plate of the discharge portion is supported by the mower-side operation tool so as to be vertically swingable about the first horizontal axis,
The bottom plate of the grass collection duct, which is continuous with the bottom plate of the discharge part to form a grass cutting guide surface, is supported so as to be vertically swingable around the second horizontal axis by the operation of the duct side operation tool,
The bottom plate of the grass collecting duct has a front end portion which is connected to the bottom plate of the discharge portion in a cut grass guiding state and a front end portion which is rotated upward so that the center of gravity is located rearward of the position of the second horizontal axis. The mower according to claim 1, wherein the mower is provided so as to be swingable over the retracted state.   The mower according to claim 2, further comprising: a gap suppressing member that pushes and operates a side plate of the grass collection duct toward the inner side in the horizontal direction.

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