JP5729157B2 - Mower - Google Patents

Description

  The present invention relates to a mower.

  As a conventional mower that cuts grass, turf, etc. while self-propelled, for example, Patent Document 1 discloses a support frame connected to the rear part of the self-propelled vehicle, and a grass collection container supported by the support frame so as to be able to move up and down. There is disclosed a mower equipped with a drive mechanism for raising and lowering a grass collection container with respect to a support frame. In this mower, the self-propelled vehicle and the support frame are detachably coupled by a coupling mechanism through a detachable coupling pin or the like.

JP 2009-273406 A

  By the way, the mower described in Patent Document 1 as described above, for example, when removing the grass collection container from the self-propelled vehicle, collects the support frame that is connected to the rear portion of the self-propelled vehicle by removing the attachment / detachment connecting pin. Although it is configured to remove the grass container, there is room for further improvement in terms of desorption of the grass container.

  This invention is made | formed in view of said situation, Comprising: It aims at providing the mower which can remove | desorb a grass collection container appropriately.

In order to achieve the above object, a mower according to the present invention includes a vehicle body having a traveling vehicle body and a grass cutting portion for cutting grass, a support frame fixed to a vehicle body rear portion of the vehicle body, and the grass that has been cut off. a grass catcher unit including a grass catcher for accommodating the lifting mechanism for supporting the grass catcher vertically movably, wherein the support frame and the longitudinal member provided on left and right with respect to the vehicle width, the pair of forming a gate-shaped or hollow square type comprising a transverse member stretched between the longitudinal member, the lifting mechanism includes an upper lift arm, and the lower lift arms of the upper lift arm and the lower lift arms a lift arm base for connecting the base end portion, the upper lift arm and provided with a mounting arm for coupling the distal end portion of the lower lift arms, in a state where the support frame is fixed to the rear portion of the vehicle body, before By providing a connecting mechanism for detachably connecting the longitudinal member of the support frame the lift arm base of the lifting mechanism, the grass catcher unit detachably configured with respect to the support frame, wherein the connecting mechanism, the vehicle body An arm for connecting the grass container unit to the rear side of the support frame with respect to the advancing direction of the main body, an operation member for performing an attaching / detaching operation on the front side of the support frame, and for supporting the grass container A hook part for hooking a connecting body provided with a fulcrum to a stepped part provided on the outer surface of the support frame and positioning the connecting body on the support frame; It has the contact part .

In the mower according to the present invention, the connection mechanism is configured such that the support frame and the grass collection container unit are detachably connected in a state where the support frame is fixed to the rear part of the vehicle body , so that the grass collection container is properly connected. Can be desorbed. That is, this connection mechanism can remove the grass container unit with the support frame fixed to the rear portion of the vehicle body .

FIG. 1 is a side view illustrating a schematic configuration of the mower according to the first embodiment. FIG. 2 is a schematic diagram illustrating the operation of the grass collection container unit according to the first embodiment. FIG. 3 is a perspective view illustrating the coupling mechanism according to the first embodiment. FIG. 4 is a perspective view showing the coupling mechanism according to the first embodiment. FIG. 5 is a flowchart illustrating an example of a method of removing the grass container unit according to the first embodiment. FIG. 6 is a partial perspective view illustrating an example of the carrier base according to the first embodiment. FIG. 7 is a partial perspective view illustrating an example of a holding mechanism according to the first embodiment. FIG. 8 is a partial perspective view showing an example of a carrier base according to a modification. FIG. 9 is a partial perspective view illustrating an example of a holding mechanism according to a modification. FIG. 10 is a configuration diagram illustrating an example of holding according to the modification. FIG. 11 is a configuration diagram illustrating an example of a holding mechanism according to a modification. FIG. 12 is a cross-sectional view illustrating an example of a holding mechanism according to a modification. FIG. 13 is a side view illustrating a schematic configuration of the mower according to the second embodiment. FIG. 14 is an exploded perspective view showing the coupling mechanism according to the second embodiment. FIG. 15 is a perspective view illustrating a coupling mechanism according to the second embodiment. FIG. 16 is a side view illustrating a schematic configuration of the mower according to the third embodiment. FIG. 17 is a side view showing the coupling mechanism according to the third embodiment. FIG. 18 is a perspective view illustrating a tightening unit according to the third embodiment. FIG. 19 is a perspective view showing a coupling mechanism according to the fourth embodiment.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

[Embodiment 1]
1 is a side view showing a schematic configuration of a mower according to the first embodiment, FIG. 2 is a schematic diagram for explaining the operation of the grass collection container unit according to the first embodiment, and FIGS. FIG. 5 is a flowchart illustrating an example of a method of removing the grass container unit according to the first embodiment. FIG. 6 is a partial perspective view illustrating an example of the carrier base according to the first embodiment. 7 is a partial perspective view showing an example of a holding mechanism according to the first embodiment, FIG. 8 is a partial perspective view showing an example of a carrier base according to a modification, and FIG. 9 is an example of a holding mechanism according to the modification. FIG. 10 and FIG. 11 are configuration diagrams illustrating an example of a holding mechanism according to a modification, and FIG. 12 is a cross-sectional view illustrating an example of a holding mechanism according to the modification. 3 shows a state where the grass container unit is detached from the support frame (detached state), and FIG. 4 shows a state where the grass container unit is connected to the support frame (connected state). .

  A mower 1 according to this embodiment shown in FIG. 1 is a working vehicle that cuts grass while a vehicle body 10 having a plurality of wheels 12 travels by power generated by a power generation source. The mower 1 of the present embodiment is a riding mower that mows grass or turf while an operator gets on and operates the vehicle body 10.

  The mower 1 of this embodiment includes a vehicle body 10, a support frame 30, a grass collection container unit (collector) 50, and a connection mechanism 70.

  The vehicle body 10 cuts grass while traveling, and includes a traveling vehicle body 11, a plurality of wheels 12, a mower deck 13 as a grass cutting unit, a discharge body 14, a guide body 15, and the like.

  The traveling vehicle body 11 is equipped with an internal combustion engine 11E (for example, a gasoline engine or a diesel engine) as a power generation source. The plurality of wheels 12 are attached to the traveling vehicle body 11. The plurality of wheels 12 is provided with a total of four, left and right front wheels 12F that form steering wheels, and left and right rear wheels 12R that form drive wheels. The power of the internal combustion engine 11E is transmitted to the left and right rear wheels 12R via a power transmission member such as a transmission, a chain housed in the chain case 16, a timing belt, and the like. With such a structure, the vehicle body 10 travels while the power of the internal combustion engine 11E is transmitted to the ground L. The vehicle body 10 uses a rear wheel drive system that drives the left and right rear wheels 12R, but the drive system of the vehicle body 10 is not limited to this. For example, a front wheel drive system or an all-wheel drive system may be used as the drive system of the vehicle body 10.

  Further, the traveling vehicle body 11 is provided with a forward / reverse operation pedal 18 for performing a forward / reverse operation at the front portion of the floor 17. The traveling vehicle body 11 includes a driver seat 19 on which a driver of the vehicle body 10 is seated, and a handle 20 is provided at a position facing the driver seat 19 forward in the traveling direction. The vehicle body 10 is operated to move forward and backward by a forward / reverse operation pedal 18. In the vehicle body 10, the left and right front wheels 12F, which are steered wheels, are steered by turning the handle 20, and the traveling direction can be changed.

  Here, the traveling direction of the vehicle body 10 is a direction from the driver's seat 19 of the vehicle body 10 toward the handle 20 when the vehicle body 10 travels straight. The traveling direction is typically a direction along the front-rear direction of the traveling vehicle body 11, with the handle 20 side being the front side and the driver's seat 19 being the rear side. In the following description, a direction perpendicular to the traveling direction is referred to as a vehicle width direction.

  The mower deck 13 is attached to the lower portion of the traveling vehicle body 11 so as to be able to move up and down, and cuts and discharges grass by rotating a rotary blade 22 disposed in the housing 21. The mower deck 13 is disposed between the front wheels 12F and the rear wheels 12R and below the traveling vehicle body 11. The lower part of the traveling vehicle body 11 is the ground L side of the traveling vehicle body 11. The mower deck 13 is attached in a state suspended from the lower portion of the traveling vehicle body 11 via the link mechanisms 23F and 23R, and is configured to be lifted and lowered by a lift arm or the like. With such a structure, the mower deck 13 can be moved up and down along the vertical direction on the side facing the ground L of the traveling vehicle body 11. That is, the mower deck 13 has both an operation of moving away from the ground L and approaching the traveling vehicle body 11 (up) and an operation of moving away from the traveling vehicle body 11 and approaching the ground L (down) on the lower side of the traveling vehicle body 11. Is possible. For example, the mower deck 13 is moved up and down by operation of a lever connected to the link mechanisms 23F and 23R, or operation of the link mechanisms 23F and 23R by an actuator such as an electric motor or a hydraulic cylinder. In the mower deck 13, a gauge wheel 24, a ground ring 25, and the like are disposed before and after the housing 21.

  In the traveling vehicle body 11, the mower deck 13 is provided with a total of two rotary blades 22, one on each side along the vehicle width direction of the vehicle body 10. The power for rotating each rotary blade 22 of the mower deck 13 is a part of the power generated by the internal combustion engine 11E. In the mower deck 13, a part of the power generated by the internal combustion engine 11E is rotated through a power take-out shaft, a universal joint shaft, an input shaft, a bevel gear mechanism of a power input portion provided on the mower deck 13 side, various pulleys, a transmission belt, and the like. The rotation is transmitted to each rotary shaft of the blade 22, and each rotary blade 22 is rotationally driven. The mower deck 13 cuts grass, turf or the like while each rotary blade 22 rotates. Grass and turf cut by each rotating blade 22 (hereinafter referred to as “mowing grass”) are given kinetic energy by the rotation of each rotating blade 22 and are discharged (throwing) from the discharge passage to the emitter 14 described later. Is done.

  Further, since the mower deck 13 cuts grass or turf with the rotary blades 22 growing on the ground L, the housing 21 for storing these has an opening. With such a structure, the mower deck 13 sucks air from the opening of the housing 21 when each rotary blade 22 rotates. The sucked air is discharged together with the mowing grass from the discharge passage to the emitter 14 described later. Thus, each rotary blade 22 also has a function as a blower that sucks and discharges air.

  The mower deck 13 configured as described above has a mowing grass throwing function obtained by rotating each rotary blade 22 and a suction / exhaust function as a blower. With these functions, the mower deck 13 causes the rotary blades 22 to release the cut grass from the housing 21 toward the discharge body 14 and the guide body 15 to be described next, and store them in the grass collection container 51.

  The emitter 14 moves up and down together with the mower deck 13 and allows the grass discharged from the mower deck 13 to pass therethrough. The emitter 14 is attached to the housing 21 via a hinge or the like so as to be continuous with the discharge passage of the mower deck 13. The discharge body 14 is inserted into a guide body 15 described below at the end opposite to the discharge passage side.

  The guide body 15 is attached to the traveling vehicle body 11 and guides the grass that has passed through the emitter 14 to a grass collection container 51 described later. The guide body 15 is provided between the mower deck 13 and the grass collection container 51 with respect to the traveling direction, more specifically, between the emitter 14 and the grass collection container 51. Further, the guide body 15 is provided between the left and right rear wheels 12R in the vehicle width direction. The guide body 15 is a structure having a passage for connecting the discharge body 14 and the grass collection container 51 and guiding the cut grass that has been discharged from the mower deck 13 and passed through the discharge body 14 into the collection container 51.

  The support frame (collector frame) 30 is a structure for supporting a grass container unit 50 described later, and is fixed to the rear portion of the vehicle body in the traveling direction of the vehicle body 10. The rear part of the vehicle body 10 is an end on the rear side with respect to the traveling direction of the vehicle body 10 and is typically an end on the back side of the driver's seat 19 (opposite to the handle 20).

  Here, the traveling vehicle body 11 of the vehicle body 10 includes a main frame 31 provided along the front-rear direction, a vertical frame 32 attached to the rear portion of the main frame 31, and a center attached to the rear portion of the vertical frame 32. And a hitch bracket 33 cut into a rectangle. Here, two hitch brackets 33 are attached to the vertical frame 32 so as to face each other. The support frame 30 is fixed to the hitch bracket 33.

  In the traveling vehicle body 11, the support frame 30 is configured to include a pair of vertical members 34 provided on the left and right in the vehicle width direction, and a horizontal member 35 spanned between the pair of vertical members 34. For example, it is configured in a gate shape or a square shape. Here, the vertical member 34 is a columnar member provided along the vertical direction. The horizontal member 35 is a beam-shaped member provided along the vehicle width direction, and both ends thereof are coupled to the vertical members 34, respectively.

  The grass collection container unit 50 includes a grass collection container (container) 51, a cover 52, a bottom plate 53, an elevating mechanism 54 for raising and lowering the grass collection container 51, and the like. The grass collection container unit 50 including the grass collection container 51 is attached to and supported by the vertical member 34 of the support frame 30 via a coupling mechanism 70 that couples the grass collection container unit 50 and the support frame 30. The connection mechanism 70 will be described in detail later.

  The grass collection container 51 stores the cut grass. The grass collection container 51 stores the grass that has been cut by the mower deck 13 and carried via the discharge body 14 and the guide body 15. The grass collection container 51 is a net-like structure, and is configured by combining, for example, a punching metal or a metal net. With such a structure, the grass collection container 51 has good ventilation. The grass collection container 51 has an opening formed between the upper part and the rear part, and the upper part and the rear part are covered with a cover 52 along the opening.

  The upper end of the cover 52 is connected to the upper front end of the grass collection container 51 via the cover shaft 52a. Thereby, the cover 52 is configured to be rotatable up and down around the cover shaft 52a. The cover 52 has a hook pin 52b at the rear end. The hook pin 52 b is engaged with a hook 51 a provided at the rear end portion of the grass collection container 51. The grass container unit 50 is held by the hook 51a so that the hook pin 52b can be engaged with the hook 51a when the grass container 51 is raised and lowered, and the hook 51a is engaged when the grass container unit 50 is reversed at the raised position. The cover 52 is configured to be removed and opened. The cover 52 is opened and closed by expansion and contraction of a cover opening / closing cylinder 52c (see FIG. 2) provided on the side surface of the grass collection container 51.

  The bottom plate 53 is positioned below the grass collection container 51 and places and holds the grass collection container 51. The bottom plate 53 is a plate material whose entire surface is metal (for example, steel or aluminum alloy).

  The elevating mechanism 54 includes a link mechanism 55 as an arm portion and a lift cylinder 61. The link mechanism 55 is a parallel link that supports the grass collection container 51 to be movable up and down on the support frame 30, and includes a lift arm base (link plate) 56 as a coupling body, an upper lift arm 57 as an arm (collector link), and a lower link. A side lift arm 58, a mounting arm 59, and the like are included.

  The lift arm base 56, the upper lift arm 57, the lower lift arm 58, and the attachment arm 59 are each provided in pairs on both sides of the grass collection container 51 in the vehicle width direction. The pair of lift arm base 56, upper lift arm 57, lower lift arm 58, and attachment arm 59 are each connected to the corresponding vertical member 34 via a connection mechanism 70. That is, a pair of connecting mechanisms 70 described later are provided on both sides of the grass collection container 51.

  In the following description, the pair of vertical members 34, the lift arm base 56, the upper lift arm 57, the lower lift arm 58, the mounting arm 59, and the coupling mechanism 70 have substantially the same symmetrical configuration on the left and right. Therefore, unless otherwise specified, one is described and the other description is omitted as much as possible.

  The lift arm base 56 is a member serving as a base of the link mechanism 55, and the base end portions of the upper lift arm 57 and the lower lift arm 58 are connected to each other. The lift arm base 56 is provided with link pins 57 a and 58 a as fulcrums of the upper lift arm 57 and the lower lift arm 58. Here, the lift arm base 56 is a columnar member having a U-shaped cross section. The lift arm base 56 is connected to a rear upper end portion in the traveling direction of the vertical member 34 of the support frame 30 via a connection mechanism 70. The lift arm base 56 is coupled to the vertical member 34 such that the U-shaped rear surface faces the rear surface of the vertical member 34 in the traveling direction.

  The upper lift arm 57 and the lower lift arm 58 are arm-like members that extend from the lift arm base 56 to the rear side in the traveling direction, respectively. The upper lift arm 57 is on the upper side in the vertical direction, and the lower lift arm 58 is on the lower side in the vertical direction. Located in. The base ends of the upper lift arm 57 and the lower lift arm 58 are connected to the lift arm base 56 via link pins 57a and 58a, respectively. Accordingly, the upper lift arm 57 and the lower lift arm 58 are configured to be rotatable up and down around the link pins 57a and 58a, respectively.

  The attachment arm 59 is an arm-shaped member extending along the vertical direction from the tip ends of the upper lift arm 57 and the lower lift arm 58. The lower end of the mounting arm 59 is connected to the tip of the lower lift arm 58 via the link pin 59a, and the center is connected to the tip of the upper lift arm 57 via the link pin 59b. As a result, the attachment arm 59 is configured such that the lower end portion is rotatable about the link pin 59a as the rotation center, and the center portion is rotatable about the link pin 59b as the rotation center.

  Then, the mounting arm 59 rotates the grass collecting container 51 about the support shaft 59c through the support shaft 59c at a portion between the support position by the link pin 59a and the support position by the link pin 59b. Supports freely. The lower end portion of the attachment arm 59 can be looked into the arm cover 60 on the outer side of the grass collection container 51, and the reverse rotation of the grass collection container 51 can be restricted by engagement with the arm cover 60. .

  The lift cylinder 61 is connected to the lower lift arm 58 and the support frame 30. The lift cylinder 61 has a movable portion 61 a on the upper end side connected to an intermediate portion of the lower lift arm 58 so as to be rotatable. Further, the lift cylinder 61 has a lower cylinder portion 61b connected to a mounting member 61c provided at the lower end of the vertical member 34 of the support frame 30 via a pin 61d and the like. The lift cylinder 61 is a hydraulic cylinder that is operated by oil or the like, and the movable portion 61a expands and contracts with respect to the cylinder portion 61b according to the hydraulic pressure supplied to the inside via various hydraulic systems 61e such as hydraulic piping. Then, the link pins 57a and 58a are rotated about the rotation center while raising and lowering the entire link mechanism 55 in the vertical direction. The hydraulic system 61e is connected to a hydraulic control device on the vehicle body 10 side via a quick coupler 61f provided on the back side of the driver's seat 19.

  The mower 1 configured as described above cuts grass, turf, or the like as each rotary blade 22 of the mower deck 13 rotates. The mowed grass is further discharged from the discharge passage to the later-described discharger 14 side as each rotary blade 22 rotates, and is stored in the grass collection container 51 via the discharger 14, the guide member 15 and the like.

  At this time, as shown in FIG. 2, the grass cutter 1 corresponds to the lowermost position when the grass cut by the mower deck 13 is stored in the grass collection container 51 during the cutting operation. It is set at the lowered housing position A.

  Then, when the grass collection container 51 is filled with the mowing grass, the mower 1 rotates the lift cylinder 61 by hydraulic control according to the operator's operation and lifts the link mechanism 55 to the ascending position B side. Let Thereby, the grass collection container unit 50 starts to rotate so that the grass collection container 51 supported by the mounting arm 59 is separated from the vehicle body 10. In the grass cutter 1, when the link mechanism 55 reaches the upper limit position C, the grass collection container 51 is tilted and rotated backward. Then, the mower 1 pushes the cover 52 upward by releasing the engagement of the hook 51a and extending the cover opening / closing cylinder 52c by hydraulic control. The grass cutter 1 becomes the discharge position D where the stored grass is dropped and discharged from the opening of the grass collection container 51 to a predetermined location such as the ground by opening the cover 52. When the mower 1 returns from the discharge position D to the lowered storage position A, the mower 1 is operated by the reverse operation.

  In the grass collection container unit 50 including the grass collection container 51 of the present embodiment, the lift arm base 56 is supported by the vertical member 34 of the support frame 30 via the connection mechanism 70.

  The connection mechanism 70 of the present embodiment connects the support frame 30 and the grass collection container unit 50 in a detachable manner with the support frame 30 fixed to the rear portion of the vehicle body 10, thereby allowing the grass collection container 51 to be attached. It is designed to allow proper desorption. That is, the coupling mechanism 70 can remove the grass collection container unit 50 including the grass collection container 51 while the support frame 30 is fixed to the rear part of the vehicle body 10.

  Here, the connection mechanism 70 connects the grass container unit 50 to the rear surface side of the support frame 30 with respect to the traveling direction of the vehicle body 10, and handles 81 ( 3) is provided. Accordingly, the connection mechanism 70 can be configured to be easily attached / detached by the operator by providing the handle 81, which is a part that the operator holds when attaching / detaching the grass container unit 50, on the front side. .

  Specifically, as shown in FIGS. 3 and 4, the coupling mechanism 70 has a boundary between the support frame 30 fixed to the vehicle body 10 side and the lift arm base 56 on the grass container unit 50 side as a boundary. The grass container unit 50 is detached from the vehicle body 10. The connection mechanism 70 connects the lift arm base 56 to the rear upper end portion in the traveling direction of the vertical member 34 of the support frame 30.

  In the following description, unless otherwise specified, a state in which the vertical member 34 of the support frame 30 and the lift arm base 56 of the grass container unit 50 are connected in the connection mechanism 70 is referred to as a connected state. A state in which 34 and the lift arm base 56 are removed is referred to as a removed state.

  The connection mechanism 70 of this embodiment includes a hook portion 71 as a hook portion, a close contact portion 72, and a lateral displacement prevention plate 73.

  The hook portion 71 positions the lift arm base 56 on the support frame 30 by hooking it onto a locking pin 75 as a stepped portion provided on the outer surface of the support frame 30. The hook portion 71 includes a locking plate 74 and the locking pin 75.

  The locking plate 74 is provided at the lower end in the vertical direction of the lift arm base 56 and constitutes a part of the coupling body. The locking plate 74 has a U-shaped cross section. The locking plate 74 is joined to the U-shaped rear surface facing the front surface of the lift arm base 56 in the traveling direction, and is fixed to the lift arm base 56. The locking plate 74 is fixed to the lift arm base 56 in such a positional relationship that both U-shaped side surfaces face each other in the vehicle width direction. The locking plate 74 is formed with an engagement notch 76 at the lower ends in the vertical direction on both side surfaces. The engagement notch 76 opens toward the lower side in the vertical direction.

  The locking pin 75 is a columnar protrusion provided on the outer surface of the vertical member 34 of the support frame 30. The locking pins 75 are provided on both side surfaces of the vertical member 34 facing in the vehicle width direction. As shown in FIG. 4, the locking pin 75 is formed in a position and a size corresponding to the engagement notch 76 in the connected state.

  As shown in FIG. 4, the hook portion 71 configured as described above is in a state in which the vertical member 34 is sandwiched between both side surfaces of the locking plate 74 in the connected state. When the hook portion 71 is in the connected state, the locking pin 75 is inserted into the engagement notch 76, thereby locking the lower end portion of the lift arm base 56 via the locking plate 74. That is, the hook portion 71 restricts the movement of the locking plate 74 relative to the vertical member 34 and the lower end portion of the lift arm base 56 to other than the upper side in the vertical direction. Therefore, the hook portion 71 can be positioned on the vertical member 34 by hooking the lower end portion of the lift arm base 56 in the vertical direction on the locking pin 75 in the connected state. At this time, the vertical member 34 and the lift arm base 56 have substantially the same upper end position in the vertical direction.

  The contact portion 72 positions the lift arm base 56 on the support frame 30 by bringing the lift arm base 56 into close contact with the support frame 30 side. The contact portion 72 includes a contact member 77 and a tightening portion 78.

  The contact member 77 is a member that is provided on the vertical member 34 of the support frame 30 and is tightened by the tightening portion 78. Here, the contact member 77 is provided at the upper end of the vertical member 34 in the vertical direction. The contact member 77 includes a main body portion 77a formed in a rectangular plate shape, and a bent portion 77b formed by bending an end portion of the main body portion 77a substantially at a right angle. In the contact member 77, the main body 77 a is joined and fixed to the upper end surface of the vertical member 34 in such a positional relationship that the front end of the bent portion 77 b faces the front side in the traveling direction. In the contact member 77, the end of the main body 77 a on the rear side in the traveling direction is substantially aligned with the surface of the vertical member 34 on the rear side in the traveling direction. The contact member 77 has a bolt fitting notch 77c formed at the tip of the bent portion 77b. The bolt fitting notch 77c is open upward in the vertical direction.

  The tightening portion 78 presses the upper end portion of the lift arm base 56 in the vertical direction and the upper end portion of the vertical member 34 of the support frame 30 with a tightening force due to the action of screws. Here, the tightening portion 78 presses the vertical member 34 and the lift arm base 56 through the contact member 77 described above. The tightening portion 78 includes a set bolt 79, a detachment prevention plate 80, and a handle 81 as an operation member.

  The set bolt 79 is provided at the upper end in the vertical direction of the lift arm base 56. The set bolt 79 includes a mounting plate 79a, a swing shaft 79b, and a bolt main body 79c. The attachment plate 79 a is joined and fixed to the upper end surface of the lift arm base 56. The attachment plate 79 a supports the swing shaft 79 b on the upper end surface of the lift arm base 56. The swing shaft 79b is formed in a columnar shape, and is supported by the mounting plate 79a so as to be rotatable about a rotation axis along the vehicle width direction. The bolt main body 79c is a cylindrical bar member, and a male screw groove 79d is formed at one end. The bolt body 79c has a positional relationship in which the end on the side where the male screw groove 79d is not provided faces the front in the traveling direction, that is, the side opposite to the side where the upper lift arm 57 and the lower lift arm 58 are provided. Thus, the male screw groove 79d is screwed into the female screw groove formed in the swing shaft 79b.

  The stopper plate 80 includes a main body portion 80a formed in a rectangular plate shape and a bent portion 80b formed by bending an end portion of the main body portion 80a substantially at a right angle. In the stopper plate 80, the main body 80a is fixed to the bolt main body 79c in such a positional relationship that the front end of the bent portion 80b faces the rear side in the traveling direction, that is, the lift arm base 56 side.

  The handle 81 is a cylindrical bar member, and is provided at the end of the bolt main body 79c on the side where the male thread groove 79d is not provided. The handle 81 is a portion that is gripped when an operator performs an attaching / detaching operation, and is provided on the front side of the support frame 30 by being configured as described above.

  Therefore, as shown by a two-dot chain line in FIG. 3, the tightening portion 78 has the bolt main body portion 79c of the set bolt 79 vertically moved around the rotation axis of the swing shaft 79b together with the locking plate 80 and the handle 81. It is configured to be rotatable. Then, the tightening portion 78 holds the handle 81 and rotates the handle 81 so that the bolt main body portion 79c is rotated around its axis, so that the bolt main body portion 79c is prevented from coming off by the action of a screw. The plate 80 and the handle 81 can be moved along the longitudinal direction (typically the traveling direction).

  As shown in FIG. 4, the contact portion 72 configured as described above has a contact member 77 positioned between the stopper plate 80 and the lift arm base 56 and a bolt body of the set bolt 79 in the connected state. The part 79 c is inserted into the bolt fitting notch 77 c of the contact member 77. Then, when the handle 81 is turned by the operator, the close contact portion 72 moves the bolt main body 79 c together with the locking plate 80 toward the lift arm base 56. Thereby, the contact portion 72 sandwiches the contact member 77 between the anti-separation plate 80 and the lift arm base 56. The contact portion 72 is lifted with the contact member 77 provided at the upper end in the vertical direction of the vertical member 34 by the tightening force generated by the screw of the bolt main body portion 79c when the handle 81 is further rotated by the operator. The arm base 56 is pressed. In other words, the close contact portion 72 attracts the vertical upper end portion of the lift arm base 56 to the vertical upper end portion side of the vertical member 34 by the tightening force due to the action of the screw of the bolt main body portion 79c. Therefore, in the connected state, the contact portion 72 can be positioned on the vertical member 34 by bringing the upper end of the lift arm base 56 in the vertical direction into close contact with the vertical member 34 side of the support frame 30.

  The lateral misalignment prevention plate 73 is provided at the intermediate portion in the vertical direction of the lift arm base 56. The lateral displacement prevention plate 73 is formed in a U-shaped cross section. The lateral misalignment prevention plate 73 is bonded to the lift arm base 56 with the U-shaped rear surface facing the front surface of the lift arm base 56 in the traveling direction. Further, the lateral displacement prevention plate 73 is fixed to the lift arm base 56 in such a positional relationship that both side surfaces of the U-shape are opposed to each other in the vehicle width direction. As shown in FIG. 4, the coupling mechanism 70 is in a state in which the vertical member 34 is fitted between both side surfaces of the lateral displacement prevention plate 73 in the coupled state. Therefore, the connecting mechanism 70 can prevent the vertical member 34 and the lift arm base 56 from being displaced in the vehicle width direction in the connected state.

  As described above, the coupling mechanism 70 hooks the engagement notch 76 to the locking pin 75 at the hook portion 71 to position the lift arm base 56 on the vertical member 34 of the support frame 30 and lifts at the contact portion 72. The arm base 56 is closely attached to the vertical member 34 side and positioned on the vertical member 34, so that the support frame 30 and the grass container unit 50 can be attached and detached while the support frame 30 is fixed to the rear portion of the vehicle body 10. Can be linked together. Then, the connecting mechanism 70 removes the lift arm base 56 of the grass container unit 50 from the vertical member 34 of the support frame 30 in a state where the support frame 30 is fixed to the rear portion of the vehicle body 10, and removes it from the support frame 30. The grass container unit 50 can be removed.

  Here, with reference to the flowchart of FIG. 5, the removal method of the grass collection container unit 50 is demonstrated. In the description of the flowchart, FIGS. 1, 3, 4, and the like are referred to as appropriate for each configuration of the mower 1.

  When removing the grass collection container unit 50 from the support frame 30, first, an operator installs the carrier base 90 on the lower side in the vertical direction of the grass collection container unit 50 and moves the grass collection container 51 to the lowest position. (Descent accommodation position A shown in FIG. 2) is set (ST1).

  In this case, the carrier base 90 places and supports the bottom plate 53 of the grass collection container unit 50 on the upper side in the vertical direction at the lowest position of the grass collection container 51. As illustrated in FIG. 6, the carrier base 90 includes a hook portion 91 that prevents the grass container unit 50 from slipping forward in the traveling direction and a stopper that prevents the grass container unit 50 from being laterally displaced in the vehicle width direction. 92 etc. When the operator installs the carrier base 90 on the lower side of the grass container unit 50 in the vertical direction, the hook portion 91 is hooked on the front end of the bottom plate 53 and held, and the stopper 92 is hooked on the side end of the bottom plate 53. Make sure you hold this. As a result, the carrier base 90 can reliably place and support the grass collection container unit 50 at a predetermined position.

  Returning to FIG. 5, next, the worker pulls out the pin 61d to release the lower end portion of the lift cylinder 61 from the mounting member 61c, and replaces it with the carrier base 90 (ST2).

  Here, the carrier base 90 has a holder 93 in which a notch 94 is formed, as illustrated in FIG. For example, when the operator releases the lower end portion of the lift cylinder 61 from the mounting member 61 c, the operator reinserts the pin 61 d into the lower end portion of the lift cylinder 61 and holds the pin 61 d in the notch 94 of the holder 93. Thereby, the carrier base 90 can reliably hold the lower end portion of the lift cylinder 61 at a predetermined position. Thereby, the worker can easily hold the lower end portion of the lift cylinder 61 on the carrier base 90, and can shorten the attaching and detaching time of the grass container unit 50.

  Returning to FIG. 5, the worker then stops the internal combustion engine 11E and removes the quick coupler 61f (ST3). As a result, in the grass container unit 50, the hydraulic system 61e is disconnected from the hydraulic control device on the vehicle body 10 side.

  Next, the worker grips and turns the handle 81 of the coupling mechanism 70 to move the bolt body 79 c together with the locking plate 80 in a direction away from the lift arm base 56 side. Then, the worker releases the connection between the vertical member 34 of the support frame 30 and the lift arm base 56 of the grass collection container unit 50 by rotating the bolt main body 79c together with the handle 81 at a predetermined position. (ST4). The worker releases the connection of both the left and right connection mechanisms 70.

  Then, the worker restarts the internal combustion engine 11E and advances the vehicle body 10 at a low speed, thereby separating the grass collection container unit 50 from the support frame 30, and separating the vehicle body 10 and the grass collection container unit 50 from each other. Completion (ST5).

  In this way, the coupling mechanism 70 can remove the grass container unit 50 from the support frame 30 in a state where the support frame 30 is fixed to the rear portion of the vehicle body 10. The grass collection container 51 can be appropriately detached while remaining on the side. As a result, the mower 1 can leave the support frame 30 at the rear part of the vehicle body with the grass container unit 50 separated from the vehicle body 10, so that it is necessary, for example, when traveling on the road with the vehicle body 10 alone. Equipment such as a winker can be left attached to the support frame 30. Thereby, this mower 1 can be made into the state which can drive | work on a road in a short time. In the mower 1, the support frame 30 also serves as a frame for preventing the overturn when the vehicle body 10 is traveling on the road alone, so that the safety can be further improved.

  Further, the mower 1 connects the grass container unit 50 to the rear side of the support frame 30 with respect to the traveling direction of the mowing machine 1 and is held by an operator when performing the detachment operation on the front side of the support frame 30. Since the handle 81 is provided, it is possible to facilitate the attaching / detaching operation by the operator.

  Further, in the mower 1, the connecting mechanism 70 hooks the engagement notch 76 to the locking pin 75 at the hook portion 71 to position the lift arm base 56 on the vertical member 34 of the support frame 30, and the contact portion 72. Since the lift arm base 56 is closely attached to the vertical member 34 side and positioned on the vertical member 34, the grass collection container unit 50 can be easily positioned and fixed to the support frame 30. As a result, the mower 1 can detach and attach the grass collection container unit 50 to the support frame 30 easily and reliably with a simple operation, and can shorten the attachment / detachment time of the grass collection container unit 50. it can.

  As illustrated in FIG. 7, the coupling mechanism 70 is configured to have a holding mechanism 82 that holds the end portion of the handle 81 in a position inside the side surface of the grass container unit 50 with respect to the vehicle width direction. May be. Here, the holding mechanism 82 includes a resin mold 83 provided at both ends of the handle 81. The holding mechanism 82 can position the handle 81 at a predetermined position by fitting one of the resin molds 83 into the through hole 79e of the bolt main body 79c. That is, the holding mechanism 82 can position the end portion of the handle 81 inward in the vehicle width direction regardless of the position of the through hole 79e by fitting any one of the resin molds 83 into the through hole 79e. it can. As a result, the connection mechanism 70 can position the end portion of the handle 81 on the inner side of the side surface of the grass container unit 50 or the like in the vehicle width direction, for example. Therefore, the coupling mechanism 70 can prevent the handle 81 from protruding outward from the grass container unit 50 or the like in the vehicle width direction. For example, the handle 81 can be caught by a branch or the like during work. Therefore, workability and safety can be improved.

  According to the mower 1 according to the embodiment described above, the vehicle body 10 having the traveling vehicle body 11 and the mower deck 13 that cuts the grass, the support frame 30 fixed to the vehicle body rear portion of the vehicle body 10, and the grass mower are cut off. A grass collection container unit 50 including a grass collection container 51 for storing grass, and a connecting mechanism 70 for detachably connecting the support frame 30 and the grass collection container unit 50 in a state where the support frame 30 is fixed to the rear part of the vehicle body; Is provided. Therefore, the mower 1 can properly remove the grass collection container 51 while leaving the support frame 30 on the vehicle body 10 side by the coupling mechanism 70, and can, for example, make it possible to travel on the road in a short time. be able to.

  In addition, the carrier base 90 demonstrated above may be the structure provided with the mounting part 95 in the holder 93 instead of the notch 94, as shown in FIG. In this case, for example, when the lower end portion of the lift cylinder 61 is released from the mounting member 61 c, the worker holds the lower end portion of the lift cylinder 61 in the mounting portion 95. Even in this case, the carrier base 90 can reliably hold the lower end portion of the lift cylinder 61 at a predetermined position. Therefore, the worker can easily hold the lower end portion of the lift cylinder 61 on the carrier base 90, and the time for attaching and detaching the grass container unit 50 can be shortened.

  Further, as shown in FIG. 9, the holding mechanism 82 described above may be configured to include magnet collars 84 provided at both ends of the handle 81 instead of the resin mold 83. In this case, the holding mechanism 82 can position the handle 81 at a predetermined position as described above by attracting one of the magnet collars 84 by a magnetic force in the through hole 79e of the bolt main body 79c. Even in this case, the connection mechanism 70 can hold the end portion of the handle 81 at a position inside the side surface of the grass collection container unit 50 or the like, thereby improving workability and safety.

  10 and 11, the holding mechanism 82 described above includes a circumferential groove 85 provided at both ends of the handle 81 and an elastic body 87 provided in the bolt body 79c so that the handle 81 side is provided. It may be a shifter-type locking mechanism that includes a steel ball 86 biased by the. In this case, the holding mechanism 82 can position the handle 81 at a predetermined position as described above by the steel ball 86 being fitted in one of the circumferential grooves 85. Even in this case, the connection mechanism 70 can hold the end portion of the handle 81 at a position inside the side surface of the grass collection container unit 50 or the like, thereby improving workability and safety.

  Further, as shown in FIG. 12, the holding mechanism 82 described above is fitted to the O-ring 88 provided at both ends and the center of the handle 81 and the through-hole 79e of the bolt main body 79c. It may be configured including the joint groove 89. In this case, the holding mechanism 82 can position the handle 81 at a predetermined position as described above when any of the O-rings 88 fits into the fitting groove 89. Even in this case, the connection mechanism 70 can hold the end portion of the handle 81 at a position inside the side surface of the grass collection container unit 50 or the like, thereby improving workability and safety.

[Embodiment 2]
FIG. 13 is a side view illustrating a schematic configuration of the mower according to the second embodiment, FIG. 14 is an exploded perspective view illustrating the coupling mechanism according to the second embodiment, and FIG. 15 is a perspective view illustrating the coupling mechanism according to the second embodiment. FIG. The mower according to the second embodiment is different from the first embodiment in the configuration of the coupling mechanism. In addition, about the structure, an effect | action, and effect which are common in embodiment mentioned above, the overlapping description is abbreviate | omitted as much as possible (it is the same also in the following embodiment). FIG. 15 shows a state where the grass container unit 50 is connected to the support frame 30 (connected state).

  As shown in FIGS. 13, 14, and 15, in the grass collection container unit 50 of the mower 201 according to the present embodiment, the lift arm base 56 is supported by the vertical member 34 of the support frame 30 via the coupling mechanism 270. .

  The connection mechanism 270 of the present embodiment connects the support frame 30 and the grass collection container unit 50 in a detachable manner with the support frame 30 fixed to the rear portion of the vehicle body 10, thereby allowing the grass collection container 51 to be attached. It is designed to allow proper desorption.

  Here, the coupling mechanism 270 couples the grass container unit 50 to the rear surface side of the support frame 30 with respect to the traveling direction of the vehicle body 10, and the lock lever 281 as an operation member that performs detachment operation on the front surface side of the support frame 30. Is provided. Thus, the connection mechanism 270 is configured to be easily attached / detached by the operator by providing a lock lever 281 on the front side, which is a portion that the operator holds when attaching / detaching the grass collection container unit 50. it can.

  Specifically, as shown in FIGS. 14 and 15, the coupling mechanism 270 has a boundary between the support frame 30 fixed to the vehicle body 10 side and the lift arm base 56 on the grass container unit 50 side as a boundary. The grass container unit 50 is detached from the vehicle body 10. The connection mechanism 270 connects the lift arm base 56 to the upper end on the rear side in the traveling direction of the vertical member 34 of the support frame 30.

  The coupling mechanism 270 of this embodiment includes a hook portion 71 as a hook portion and a close contact portion 272. The hook portion 71 has substantially the same configuration as the hook portion 71 of the above-described coupling mechanism 70 (see FIG. 3 and the like), and thus the description thereof is omitted.

  The contact portion 272 positions the lift arm base 56 on the support frame 30 by bringing it into close contact with the support frame 30 side. The close contact portion 272 includes a connecting member 277 and a lock link 278.

  The connecting member 277 is a member provided on the lift arm base 56 and attracted by the lock link 278. Here, the connecting member 277 is provided at the upper end in the vertical direction of the lift arm base 56. The connecting member 277 includes a mounting plate 277a formed in a rectangular plate shape and a hook bar 277b provided on the mounting plate 277a. The hook bar 277b is a rod-like member joined to the mounting plate 277a, and an end portion thereof is bent at a substantially right angle to form a bent portion 277c. The connecting member 277 is fixed by joining the mounting plate 277a to the upper end surface of the lift arm base 56 in such a positional relationship that the hook bar 277b is along the traveling direction and the bent portion 277c is directed vertically upward on the front side in the traveling direction. . The connecting member 277 has an end on the front side in the traveling direction of the mounting plate 277 a and an end on the bent portion 277 c side of the hook bar 277 b projecting from the front surface in the traveling direction of the lift arm base 56.

  The lock link 278 is a fulcrum crossing lock link, and is provided on the front side in the traveling direction of the vertical member 34 of the support frame 30. The lock link 278 hooks the connecting member 277 and attracts it to the support frame 30 side. More specifically, the lock link 278 hooks the connecting member 277 and attracts it to the support frame 30 side, thereby attracting the upper end portion of the lift arm base 56 in the vertical direction to the upper end portion side of the vertical member 34 so as to be in close contact therewith. The lock link 278 includes an engagement portion 279, a link portion 280, and a lock lever 281 as an operation member.

  The engaging portion 279 is a portion that is hooked on the bent portion 277c of the hook bar 277b. The link part 280 connects the engaging part 279 and the lock lever 281 in a predetermined relationship, and supports the engaging part 279 and the lock lever 281 so as to be rotatable. The link portion 280 is attached to the attachment plate 283 of the vertical member 34 via the swing shaft 282. The attachment plate 283 is joined to the front surface of the vertical member 34 in the traveling direction. The swing shaft 282 is formed in a columnar shape, and supports the link portion 280 on the attachment plate 283 so as to be rotatable in a positional relationship such that the center axis is along the vehicle width direction. Accordingly, the lock link 278 is moved up and down around the center axis of the swing shaft 282 together with the engaging portion 279 connected via the link portion 280, as indicated by arrows in FIG. It is configured to be rotatable. The lock lever 281 is a portion that is gripped when an operator performs an attaching / detaching operation, and is provided on the front side of the support frame 30 by being configured as described above.

  In the connected state, the contact portion 272 configured as described above holds the lock lever 281 in a state where the bent portion 277c of the hook bar 277b of the connecting member 277 is hooked on the engaging portion 279 of the lock link 278. Then, by pushing downward in the vertical direction, as shown in FIG. 15, the lift arm base 56 is attracted to the support frame 30 side together with the connecting member 277. As a result, the contact portion 272 attracts the vertical upper end of the lift arm base 56 to the vertical upper end of the vertical member 34, and the vertical upper end of the lift arm base 56 toward the vertical member 34 of the support frame 30. The vertical member 34 can be positioned in close contact. At this time, the lock lever 281 is directed downward in the vertical direction.

  The contact portion 272 is in a connected state, and the operator holds the lock lever 281 and pulls it upward in the vertical direction, so that the lift arm base 56 and the connecting member 277 are attracted to the support frame 30 side. To be released. The close contact portion 272 removes the engaging portion 279 of the lock link 278 in a state where the worker is hooked on the bent portion 277c from the bent portion 277c, so that the vertical member 34 of the support frame 30 and the grass container unit 50 The connection with the lift arm base 56 can be released.

  As described above, the coupling mechanism 270 hooks the engagement notch 76 to the locking pin 75 at the hook portion 71 to position the lift arm base 56 on the vertical member 34 of the support frame 30 and lifts at the contact portion 272. The arm base 56 is closely attached to the vertical member 34 side and positioned on the vertical member 34, so that the support frame 30 and the grass container unit 50 can be attached and detached while the support frame 30 is fixed to the rear portion of the vehicle body 10. Can be linked together. The connection mechanism 270 removes the lift arm base 56 of the grass container unit 50 from the vertical member 34 of the support frame 30 in a state where the support frame 30 is fixed to the rear part of the vehicle body 10, and The grass container unit 50 can be removed.

  As a result, the mower 201 can leave the support frame 30 at the rear part of the vehicle body with the grass container unit 50 separated from the vehicle body 10, so that it is necessary, for example, when traveling on the road with the vehicle body 10 alone. Equipment such as a winker can be left attached to the support frame 30.

  Further, in the coupling mechanism 270, the hook portion 71 hooks the vertical lower end portion of the lift arm base 56 on the locking pin 75 and positions it on the support frame 30, and the contact portion 272 is the vertical upper end portion of the lift arm base 56. And a lock link 278 provided on the front side of the support frame 30 in the traveling direction and hooked to the support frame 30 by hooking the connection member 277. As a result, the coupling mechanism 270 can easily position and fix the grass collection container unit 50 to the support frame 30, and can easily and reliably attach and detach the grass collection container unit 50 to the support frame 30 with simple operations. Thus, the time for attaching and detaching the grass container unit 50 can be shortened. In addition, the coupling mechanism 270 is configured such that the lock lever 281 is rotatable up and down around the center axis of the swing shaft 282, so that the lock lever 281 is arranged in the vehicle width direction with the grass container unit 50 and the like. It is possible to surely prevent the liquid from protruding to the outside, and workability and safety can be improved.

  According to the mower 201 according to the embodiment described above, the vehicle body 10 having the traveling vehicle body 11 and the mower deck 13 for cutting the grass, the support frame 30 fixed to the vehicle body rear portion of the vehicle body 10, and the mowed machine are cut off. A grass collection container unit 50 including a grass collection container 51 for storing grass, and a connecting mechanism 270 for detachably connecting the support frame 30 and the grass collection container unit 50 in a state where the support frame 30 is fixed to the rear portion of the vehicle body; Is provided. Therefore, the mower 201 can appropriately remove the grass collection container 51 while leaving the support frame 30 on the vehicle body 10 side by the coupling mechanism 270, and can make it possible to travel on the road in a short time, for example. be able to.

[Embodiment 3]
FIG. 16 is a side view showing a schematic configuration of the mower according to the third embodiment, FIG. 17 is a side view showing the coupling mechanism according to the third embodiment, and FIG. 18 is a perspective view showing the tightening portion according to the third embodiment. FIG. The mower according to the third embodiment is different from the first and second embodiments in the configuration of the coupling mechanism.

  In the grass collection container unit 50 of the mower 301 of this embodiment, the lift arm base 56 is supported by the vertical member 34 of the support frame 30 via the coupling mechanism 370 as shown in FIGS. .

  The connection mechanism 370 of the present embodiment connects the support frame 30 and the grass collection container unit 50 in a detachable manner with the support frame 30 fixed to the rear portion of the vehicle body 10, thereby allowing the grass collection container 51 to be attached. It is designed to allow proper desorption.

  Here, the connection mechanism 370 connects the grass container unit 50 to the rear surface side of the support frame 30 with respect to the traveling direction of the vehicle body 10, and a handle 383 as an operation member that performs an attachment / detachment operation on the front surface side of the support frame 30. Provided. Accordingly, the connection mechanism 370 can be configured to be easily attached / detached by the operator by providing the handle 383 on the front side, which is a portion that is held by the operator when the grass container unit 50 is attached / detached. .

  Specifically, as shown in FIGS. 17 and 18, the coupling mechanism 370 has a boundary between the support frame 30 fixed to the vehicle body 10 side and the lift arm base 56 on the grass container unit 50 side. The grass container unit 50 is detached from the vehicle body 10. The connecting mechanism 370 connects the lift arm base 56 to the rear upper end portion in the traveling direction of the vertical member 34 of the support frame 30.

  The coupling mechanism 370 of this embodiment includes an upper hook portion 371 and a lower hook portion 372 as hook portions, and a close contact portion 373.

  The upper hook portion 371 and the lower hook portion 372 are positioned on the support frame 30 by hooking the lift arm base 56 to locking pins 374 and 375 as stepped portions provided on the outer surface of the support frame 30, respectively. Here, the coupling mechanism 370 includes a locking plate 376.

  The locking plate 376 is provided on the lift arm base 56 and constitutes a part of the coupling body. The locking plate 376 has a U-shaped cross section. The locking plate 376 is bonded to the lift arm base 56 with the U-shaped rear surface facing the front surface of the lift arm base 56 in the traveling direction. The locking plate 376 is fixed to the lift arm base 56 in such a positional relationship that both U-shaped side surfaces face each other in the vehicle width direction. The locking plate 376 has an engagement notch 377 formed at the upper end in the vertical direction on both sides, and an engagement notch 378 formed at the lower end in the vertical direction on both sides. The engagement notches 377 and 378 are both open toward the front side in the traveling direction.

  The locking pins 374 and 375 are columnar protrusions provided on the outer surface of the vertical member 34 of the support frame 30. The locking pins 374 and 375 are provided on both side surfaces of the vertical member 34 facing in the vehicle width direction. The locking pins 374 and 375 are formed at positions and sizes corresponding to the engagement notches 377 and 378 in the connected state, respectively.

  As shown in FIG. 17, the upper hook portion 371 and the lower hook portion 372 configured as described above are in a state in which the vertical member 34 fits between both side surfaces of the locking plate 376 in the connected state. When the upper hook portion 371 is in the connected state, the locking pin 374 is inserted into the engagement notch 377, thereby locking the upper end portion of the lift arm base 56 via the locking plate 376. In the coupled state, the lower hook portion 372 has a locking pin 375 inserted into the engagement notch 378, thereby locking the lower end portion of the lift arm base 56 via the locking plate 376. In other words, the upper hook portion 371 and the lower hook portion 372 restrict the movement of the locking plate 376 and the lift arm base 56 with respect to the vertical member 34 to other than the rear side in the traveling direction. Therefore, the upper hook portion 371 and the lower hook portion 372 can be positioned on the vertical member 34 by hooking the upper and lower ends in the vertical direction of the lift arm base 56 on the locking pins 374 and 375 in the connected state.

  The contact portion 373 positions the lift arm base 56 on the support frame 30 by closely contacting the lift arm base 56 to the support frame 30 side. The close contact portion 373 includes a tightening pin 379 and a tightening portion 380.

  The fastening pin 379 is a member that is provided on the locking plate 376 and is fastened by the fastening portion 380. The fastening pins 379 are provided on both side surfaces of the locking plate 376. The fastening pin 379 is provided between the engagement notch 377 and the engagement notch 378 with respect to the vertical direction.

  The tightening portion 380 presses the lift arm base 56 and the vertical member 34 of the support frame 30 with a tightening force due to the action of screws. Here, the tightening portion 380 presses the vertical member 34 and the lift arm base 56 via the tightening pins 379 provided on the above-described locking plate 376. As shown in FIG. 18, the tightening portion 380 includes a bolt main body portion 381, a holding plate 382, and a handle 383 as an operation member.

  The bolt main body 381 is a cylindrical bar member, and a male screw groove 384 is formed. The bolt body 381 is supported by the holding plate 382. The holding plate 382 has a U-shaped cross section. In the holding plate 382, the male thread groove 384 of the bolt main body 381 is screwed into the U-shaped back surface. In addition, the holding plate 382 has an engagement notch 385 formed at the lower ends in the vertical direction on both sides of the U-shape. The engagement notch 385 opens toward the lower side in the vertical direction. The tightening portion 380 presses the lift arm base 56 and the vertical member 34 of the support frame 30 with a tightening force by the action of a screw in a state where the tightening pin 379 is inserted into the engagement notch 385. The handle 383 is a cylindrical bar member, and is provided at the end of the bolt main body 381 on the side protruding from the holding plate 382. The handle 383 is a portion that is gripped when an operator performs an attaching / detaching operation, and is provided on the front side of the support frame 30 by being configured as described above.

  In the connected state, the contact portion 373 configured as described above has the locking pins 374 and 375 inserted into the engagement notches 377 and 378 as described above, and the vertical members 34 on both side surfaces of the locking plate 376. It will be in a state in between. The close-contact portion 373 is attached with the tightening portion 380 so that the tightening pin 379 is inserted into the engagement notch 385, and the handle 383 is turned by the operator, so that the bolt main body portion 381 becomes the vertical member. Move to side 34. As a result, the close contact portion 373 sandwiches the vertical member 34 between the front end portion of the bolt main body portion 381 and the locking plate 376. The contact portion 373 presses the vertical member 34 and the lift arm base 56 with the tightening force generated by the screw of the bolt main body 381 when the handle 383 is further rotated by the operator. In other words, the close contact portion 373 attracts the lift arm base 56 to the vertical member 34 side via the locking plate 376 by the tightening force generated by the action of the screw of the bolt main body portion 381. Therefore, the contact portion 373 can be positioned on the vertical member 34 by bringing the lift arm base 56 into close contact with the vertical member 34 side of the support frame 30 in the connected state.

  Then, the handle 383 is rotated in the opposite direction by the operator so that the tightening force due to the action of the screw of the bolt main body 381 is weakened, and the engagement notch 385 is hooked on the tightening pin 379. The connection between the vertical member 34 of the support frame 30 and the lift arm base 56 of the grass container unit 50 can be released by removing the tightening portion 380 in the state.

  As described above, the connecting mechanism 370 has the upper hook portion 371 and the lower hook portion 372 hooking the engagement notches 377 and 378 on the locking pins 374 and 375 so that the lift arm base 56 is attached to the vertical member 34 of the support frame 30. In addition, the lift arm base 56 is brought into close contact with the vertical member 34 side at the contact portion 373 and positioned on the vertical member 34, thereby supporting the support frame 30 in a state where the support frame 30 is fixed to the rear portion of the vehicle body 10. The frame 30 and the grass container unit 50 can be detachably connected. Then, the connecting mechanism 370 removes the lift arm base 56 of the grass container unit 50 from the vertical member 34 of the support frame 30 in a state where the support frame 30 is fixed to the rear part of the vehicle body 10, and removes it from the support frame 30. The grass container unit 50 can be removed.

  As a result, the mower 301 can leave the support frame 30 at the rear of the vehicle body with the grass collecting container unit 50 separated from the vehicle body 10, and is necessary for, for example, traveling on the road with the vehicle body 10 alone. Equipment such as a winker can be left attached to the support frame 30.

  Further, in the coupling mechanism 370, the lift arm base 56 is positioned on the vertical member 34 of the support frame 30 by hooking the engagement notches 377 and 378 on the locking pins 374 and 375 at the upper hook portion 371 and the lower hook portion 372. At the same time, the lift arm base 56 is brought into close contact with the vertical member 34 side at the contact portion 373 and positioned on the vertical member 34. As a result, the coupling mechanism 370 can easily position and fix the grass collection container unit 50 to the support frame 30, and can easily and reliably attach and remove the grass collection container unit 50 to the support frame 30 with simple operations. Thus, the time for attaching and detaching the grass container unit 50 can be shortened.

  According to the mower 301 according to the embodiment described above, the vehicle body 10 having the traveling vehicle body 11 and the mower deck 13 for mowing the grass, the support frame 30 fixed to the vehicle body rear portion of the vehicle body 10, and the mowed machine. A grass collection container unit 50 including a grass collection container 51 for storing grass, and a connecting mechanism 370 for detachably connecting the support frame 30 and the grass collection container unit 50 in a state where the support frame 30 is fixed to the rear portion of the vehicle body; Is provided. Therefore, the mower 301 can properly detach the grass collection container 51 while leaving the support frame 30 on the vehicle body 10 side by the coupling mechanism 370, for example, in a state where it can run on the road in a short time. be able to.

[Embodiment 4]
FIG. 19 is a perspective view showing a coupling mechanism according to the fourth embodiment. The mower according to the fourth embodiment is different from the first, second, and third embodiments in the configuration of the coupling mechanism.

  In the grass collection container unit 50 of the mower 401 according to this embodiment, the lift arm base 56 is supported by the vertical member 34 of the support frame 30 via the coupling mechanism 470 as shown in FIG.

  The connection mechanism 470 of the present embodiment connects the support frame 30 and the grass collection container unit 50 in a state where the support frame 30 is fixed to the rear part of the vehicle body 10 so that the grass collection container 51 is attached. It is designed to allow proper desorption.

  Here, the connection mechanism 470 connects the grass container unit 50 to the rear surface side of the support frame 30 with respect to the traveling direction of the vehicle body 10, and handles 480 as an operation member that performs detachment operation on the front surface side of the support frame 30. 484 is provided. Accordingly, the connection mechanism 470 is configured to be easily attached / detached by the operator by providing the front side with the handles 480 and 484 that are gripped by the operator when the grass container unit 50 is attached / detached. Can do.

  Specifically, as shown in FIG. 19, the coupling mechanism 470 is configured to collect grass with a boundary between the support frame 30 fixed to the vehicle body 10 side and the lift arm base 56 on the grass collection container unit 50 side as a boundary. The container unit 50 is detached from the vehicle body 10. The connecting mechanism 470 connects the lift arm base 56 to the rear upper end portion in the traveling direction of the vertical member 34 of the support frame 30.

  The connection mechanism 470 of this embodiment includes a placement portion 471 as a hook portion and a close contact portion 472.

  The placement portions 471 each position the lift arm base 56 on the support frame 30 by hooking it on a step plate 473 as a stepped portion provided on the outer surface of the support frame 30. The placement unit 471 includes a step plate 473 and a placement plate 474.

  The step plate 473 is provided on the vertical member 34 of the support frame 30. The step plate 473 is formed in a U-shaped plate shape, and is joined so as to surround both the side surfaces in the vehicle width direction and the rear surface in the traveling direction of the vertical member 34.

  The mounting plate 474 is provided on the lift arm base 56 and constitutes a part of the coupling body. The mounting plate 474 has a U-shaped cross section. The mounting plate 474 is bonded to the lift arm base 56 with a U-shaped rear surface facing the front surface of the lift arm base 56 in the traveling direction. The mounting plate 474 is fixed to the lift arm base 56 in such a positional relationship that both side surfaces of the U-shape are opposed to each other in the vehicle width direction.

  As shown in FIG. 19, the mounting portion 471 configured as described above is in a state in which the vertical member 34 is interposed between both side surfaces of the mounting plate 474 in the connected state. In the connected state, the lower end of the mounting plate 474 is mounted on the step plate 473, and the mounting portion 471 positions the lower end of the lift arm base 56 via the mounting plate 474. The placement portion 471 restricts the movement of the lower end portion of the lift arm base 56 with respect to the vertical member 34 in the vertical direction. Therefore, the mounting portion 471 can be positioned on the vertical member 34 by hooking the lower end of the lift arm base 56 in the vertical direction on the step plate 473 in the connected state. At this time, the vertical member 34 and the lift arm base 56 have substantially the same upper end position in the vertical direction.

  The contact portion 472 positions the lift arm base 56 on the support frame 30 by bringing the lift arm base 56 into close contact with the support frame 30 side. The contact portion 472 includes an upper turnbuckle mechanism 475 and a side turnbuckle mechanism 476.

  The upper turnbuckle mechanism 475 includes an engagement plate 477 and a turnbuckle 478 as a tightening portion.

  The engagement plate 477 is a member that is provided on the vertical member 34 of the support frame 30 and is engaged by the turnbuckle 478. The engagement plate 477 is provided at the upper end of the vertical member 34 in the vertical direction. The engagement plate 477 includes a main body portion 477a formed in a rectangular plate shape, and a bent portion 477b formed by bending an end portion of the main body portion 477a substantially at a right angle. In the engagement plate 477, the main body portion 477a is joined and fixed to the upper end surface of the vertical member 34 in such a positional relationship that the front end of the bent portion 477b faces the front side in the traveling direction. The engagement plate 477 has a bolt fitting notch 477c formed at the tip of the bent portion 477b. The bolt fitting notch 477c opens toward the upper side in the vertical direction.

  The turnbuckle 478 presses the upper end of the lift arm base 56 in the vertical direction and the upper end of the vertical member 34 of the support frame 30 with a tightening force due to the action of screws. Here, the turnbuckle 478 presses the vertical member 34 and the lift arm base 56 through the engagement plate 477 described above. The turnbuckle 478 includes a set bolt 479 and a handle 480 as an operation member.

  The set bolt 479 is provided at the upper end in the vertical direction of the lift arm base 56. The set bolt 479 includes a mounting plate 479a, a swing shaft 479b, and a bolt main body 479c. The attachment plate 479 a is joined and fixed to the upper end surface of the lift arm base 56. The mounting plate 479 a supports the swing shaft 479 b on the upper end surface of the lift arm base 56. The swing shaft 479b is formed in a columnar shape, and is supported by the mounting plate 479a so as to be rotatable about a rotation axis along the vehicle width direction. The bolt main body portion 479c is a columnar bar member, and a male screw groove 479d is formed in part. One end of the bolt main body 479c is supported by the swing shaft 479b so as to be rotatable around the shaft, and is assembled so as not to come off from the swing shaft 479b.

  The handle 480 is a cylindrical bar member, and is provided at the end opposite to the end supported by the swing shaft 479b of the bolt main body 479c. The handle 480 is a portion that is gripped when an operator performs an attaching / detaching operation, and is provided on the front side of the support frame 30 by being configured as described above.

  Therefore, the turnbuckle 478 is configured so that the bolt main body 479c of the set bolt 479 can rotate up and down around the rotation axis of the swing shaft 479b together with the handle 480, as indicated by an arrow E in the figure. Then, the upper turnbuckle mechanism 475 has the bolt main body portion 479c of the set bolt 479 fitted in the bolt fitting notch 477c of the engagement plate 477, and the operator grips and turns the handle 480 so that the bolt main body portion 479c. Is rotated around the axis, the bolt main body portion 479c can be moved along the longitudinal direction (typically the traveling direction) together with the handle 480 by the action of the screw. The upper turnbuckle mechanism 475 has an engagement plate 477 provided at the upper end in the vertical direction of the vertical member 34 by the tightening force caused by the action of the screw of the bolt main body 479c when the handle 480 is further turned by the operator. And lift arm base 56 are pressed. In other words, the upper turnbuckle mechanism 475 attracts the upper end in the vertical direction of the lift arm base 56 to the upper end in the vertical direction of the vertical member 34 by the tightening force generated by the action of the screw of the bolt main body 479c.

  Similarly, the side turn buckle mechanism 476 includes an engagement plate 481 and a turn buckle 482 as a tightening portion.

  The engagement plate 481 is a member that is provided on the vertical member 34 of the support frame 30 and is engaged by the turnbuckle 482. The engagement plate 481 is provided on one side surface of the vertical member 34 in the vehicle width direction. The engagement plate 481 includes a main body portion 481a formed in a rectangular plate shape, and a bent portion 481b formed by bending an end portion of the main body portion 481a substantially at a right angle. The engagement plate 481 is fixed so that the main body 481a is joined to the side surface of the vertical member 34 in such a positional relationship that the tip of the bent portion 481b faces the outside in the vehicle width direction. The engagement plate 481 has a bolt fitting notch 481c formed at the tip of the bent portion 481b. The bolt fitting notch 481c opens toward the outer side in the vehicle width direction.

  The turnbuckle 482 includes a set bolt 483 and a handle 484 as an operation member.

  The set bolt 483 is provided on one side surface of the lift arm base 56 in the vehicle width direction. The set bolt 483 includes a mounting plate 483a, a swing shaft 483b, and a bolt main body 483c. The mounting plate 483a is joined and fixed to one side surface of the lift arm base 56 in the vehicle width direction. The mounting plate 483a supports the swing shaft 483b on one side surface of the lift arm base 56 in the vehicle width direction. The swing shaft 483b is formed in a cylindrical shape, and is supported by the mounting plate 483a so as to be rotatable around a rotation axis along the vertical direction. The bolt main body 483c is a cylindrical bar member, and a male screw groove 483d is formed in part. One end of the bolt main body 483c is supported by the swing shaft 483b so as to be rotatable around the shaft, and is assembled so as not to come off from the swing shaft 483b.

  The handle 484 is a cylindrical bar member, and is provided at the end opposite to the end supported by the swing shaft 483b of the bolt main body 483c. The handle 484 is a portion that is gripped when an operator performs an attachment / detachment operation, and is configured on the front side of the support frame 30 by being configured as described above.

  Accordingly, the turnbuckle 482 is configured so that the bolt main body 483c of the set bolt 483 is rotatable with the handle 484 about the rotation axis of the swing shaft 483b as the rotation center, as indicated by an arrow F in the figure. In the side turn buckle mechanism 476, the bolt main body 483c of the set bolt 483 is fitted in the bolt fitting notch 481c of the engagement plate 481, and the operator grips and rotates the handle 484 so that the bolt main body 483c. Is rotated around the axis, the bolt main body 483c can be moved along the longitudinal direction (typically the traveling direction) together with the handle 484 by the action of the screw. The side turn buckle mechanism 476 is configured such that the handle 484 is further turned by an operator, and the engagement plate 481 provided on the side surface of the vertical member 34 and the lift arm are tightened by the tightening force generated by the screw action of the bolt main body 483c. Press against the base 56. In other words, the side turn buckle mechanism 476 attracts the side surface portion of the lift arm base 56 to the vertical member 34 side by the tightening force generated by the action of the screw of the bolt main body portion 483c.

  Therefore, in the connected state, the close-contact portion 472 causes the upper turnbuckle mechanism 475 and the side turnbuckle mechanism 476 to attach the vertical upper end portion and the side surface portion of the lift arm base 56 to the vertical member 34 side. The upper end of the vertical direction can be brought into close contact with the vertical member 34 side of the support frame 30 and positioned on the vertical member 34.

  In addition, when the handle 480, 484 is rotated in the opposite direction by the operator, the tightening force due to the action of the screws of the bolt main body portions 479c, 483c is weakened. In this state, the close contact portion 472 rotates the turnbuckles 478 and 482 so as to remove the bolt main body portions 479c and 483c from the bolt fitting notches 477c and 481c. The connection between the member 34 and the lift arm base 56 of the grass container unit 50 can be released.

  As described above, the connecting mechanism 470 hooks the mounting plate 474 on the step plate 473 at the mounting portion 471 to position the lift arm base 56 on the vertical member 34 of the support frame 30, and at the contact portion 472 lifts the lift arm. By positioning the base 56 in close contact with the vertical member 34 and positioning it on the vertical member 34, the support frame 30 and the grass container unit 50 can be attached and detached while the support frame 30 is fixed to the rear portion of the vehicle body 10. Can be linked to. Then, the connecting mechanism 470 removes the lift arm base 56 of the grass container unit 50 from the vertical member 34 of the support frame 30 in a state where the support frame 30 is fixed to the rear portion of the vehicle body 10 and removes the lift arm base 56 from the support frame 30. The grass container unit 50 can be removed.

  As a result, the mower 401 can leave the support frame 30 at the rear of the vehicle body with the grass collecting container unit 50 separated from the vehicle body 10, and is necessary, for example, when traveling on the road with the vehicle body 10 alone. Equipment such as a winker can be left attached to the support frame 30.

  Further, in the connection mechanism 470, the mounting plate 474 is hooked on the step plate 473 by the mounting portion 471 to position the lift arm base 56 on the vertical member 34 of the support frame 30, and the lift arm base 56 is fixed by the contact portion 472. Is closely attached to the vertical member 34 and positioned on the vertical member 34. As a result, the coupling mechanism 470 can easily position and fix the grass collection container unit 50 to the support frame 30, and can easily and reliably attach and detach the grass collection container unit 50 to the support frame 30 with simple operations. Thus, the time for attaching and detaching the grass container unit 50 can be shortened.

  According to the mower 401 according to the embodiment described above, the vehicle body 10 having the traveling vehicle body 11 and the mower deck 13 that cuts the grass, the support frame 30 fixed to the vehicle body rear portion of the vehicle body 10, and the grass mower 401 are cut off. A grass collection container unit 50 including a grass collection container 51 for storing grass, and a connecting mechanism 470 for detachably connecting the support frame 30 and the grass collection container unit 50 in a state where the support frame 30 is fixed to the rear portion of the vehicle body; Is provided. Therefore, the mower 401 can properly detach the grass collection container 51 while leaving the support frame 30 on the vehicle body 10 side by the coupling mechanism 470, for example, in a state where it can run on the road in a short time. be able to.

  The mower according to the above-described embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope described in the claims. The mower according to the present embodiment may be configured by appropriately combining the components of the embodiments described above.

1, 201, 301, 401 Mower 10 Body body 11 Traveling body 11E Internal combustion engine 12 Wheel 13 Mower deck (mowing section)
30 Support frame 34 Vertical member 50 Grass collecting container unit 51 Grass collecting container 56 Lift arm base (connecting body)
57 Upper lift arm (arm)
58 Lower lift arm (arm)
61 Lift Cylinder 70, 270, 370, 470 Connecting Mechanism 71 Hook (Hook)
72, 272, 373, 472 Adhering portion 75, 374, 375 Locking pin (stepped portion)
77 Contact member 78, 380 Tightening portion 81, 383, 480, 484 Handle (operation member)
82 Holding mechanism 90 Carrier base 93 Holder 277 Connecting member 278 Lock link 281 Lock lever (operation member)
371 Upper hook (hook)
372 Lower hook (hook)
471 Placement part (hook part)
473 Step plate (stepped part)
475 Upper turn buckle mechanism 476 Side turn buckle mechanism 478, 482 Turn buckle (tightening part)

Claims (1)

A vehicle body having a traveling vehicle body and a grass cutting portion for cutting grass;
A support frame fixed to a rear portion of the vehicle body;
A grass collection container unit including a grass collection container for storing the cut grass;
An elevating mechanism that supports the grass container so as to be raised and lowered,
The support frame is formed in a gate shape or a square shape having a vertical member provided in a pair on the left and right with respect to the vehicle width, and a horizontal member spanned between the pair of vertical members,
The elevating mechanism includes an upper lift arm, and the lower lift arms of the upper lifting arm and the lifting arm base for connecting the base end portion of the lower lift arms, the upper lifting arm and the lower lifting arm tip It has a mounting arm that connects the parts,
In a state where the support frame is fixed to the vehicle body rear portion, said vertical member and the connecting mechanism for detachably connecting the lift arm base of the elevating mechanism of the support frame by providing the said support frame said grass catcher unit It is configured to be removable with respect to
The connection mechanism connects the grass container unit to the rear side of the support frame with respect to the traveling direction of the vehicle body, and includes an operation member for performing an attaching / detaching operation on the front side of the support frame. Hook a connecting body provided with a fulcrum of an arm supporting the grass container to a stepped portion provided on the outer surface of the support frame, and position the connecting body in close contact with the support frame. And a close contact portion for positioning the support frame .

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