JP4565547B2 - Traveling lawn mower - Google Patents

Description

  The present invention relates to a traveling lawn mower equipped with a mowing mechanism (mower device) for mowing turfgrass planted on the ground, and more particularly, a turfgrass smoothly from a grass collection box that accepts turfgrass mowing by the mowing mechanism. It is related with the structure for discharging.

In general, a traveling lawn mower includes a mower device mounted on the traveling machine body so as to be movable up and down, and a grass opening box having a front opening shape for receiving turf grass cut by the mower device. As an example of this type of lawn mower, Patent Document 1 is configured so that the grass collecting box can be rotated up and down so that the grass collecting box can be switched between a grass collecting posture for receiving the cut grass and a discharging posture for discharging the received grass. Are disclosed.
JP 2001-45829 A

  By the way, in the traveling lawn mower of Patent Document 1, by switching the grass collection box to a discharge posture in which the receiving port is opened downward, the grass collected in the grass collection box is naturally dropped by its own weight to the outside. Discharge.

  In this case, in order to reliably discharge the turf grass in the grass collection box, the vertical inclination angle (rotation angle with respect to the horizontal) of the grass collection box in the discharge posture is equal to or greater than a predetermined angle (for example, 55 ° to 60 ° or more). Must be set to In other words, the grass collection box needs to be inclined at a predetermined angle or more.

  However, since the traveling lawn mower of Patent Document 1 is configured to switch the posture of the grass collection box by driving a hydraulic cylinder mounted on the traveling aircraft body, the posture switching circuit such as a hydraulic pump or a hydraulic pipe line is used. In addition to the extremely complicated structure of the hydraulic supply system for operation, there is a problem in that the increase in the number of parts causes an increase in size and an increase in manufacturing cost.

  On the other hand, manual operation by operating means such as a lever arranged on the traveling machine side, and compression that applies an urging force in an upward rotation direction (a direction in which the grass collecting box is in an open position) in which the grass collection box is in a discharging posture. In the case of adopting a configuration in which the posture of the grass collection box is switched by an urging means such as a spring, there is an advantage that a mechanism for rotating the grass collection box for posture switching can be simplified.

  In this prior art configuration, in order to reduce the operation force of the operation means as much as possible (to reduce the operation burden on the operator), the grass collection box is rotated and switched to the discharge posture mainly by the urging force of the urging means. If the urging force of the urging means is too strong, in the state where the turfgrass is empty or close to the sky in the grass collection box, the grass collection box is suddenly switched to the discharging posture and the impact due to this posture switching is increased. Therefore, in the prior art, the urging force of the urging means is set to an appropriate balance so as not to become extremely strong.

  However, for example, if a large amount of moist turf grass is stored in the grass collection box, the moist turf grass will stick to the bottom of the grass collection box and will not slide off (is difficult to discharge) unless the grass collection box is tilted to some extent. . Nevertheless, in the configuration of the above prior art, when a large amount of wet turf grass is accumulated and the weight of the grass collection box becomes considerably heavy, the biasing force of the biasing means is lost to the weight of the grass collection box, Even when the operating force and the urging force of the urging means are combined, there is a problem that the grass collection box cannot be tilted beyond a predetermined angle and the turf grass cannot be completely discharged from the grass collection box.

  In this case, in order to discharge turfgrass from the grass collection box, the operator once gets out of the driver's seat and switches to the discharge posture and lifts the grass collection box up (tilt more than a predetermined angle). Another problem was that it was troublesome and troublesome.

  Therefore, the present invention solves the above problems, and can usually easily switch the posture of the grass collection box with a light operating force, such as when a large amount of moist turf grass is stored in the grass collection box. The technical problem is to provide a traveling lawn mower that can handle special situations.

In order to solve this technical problem, a traveling lawn mower according to the invention of claim 1 is a collection unit for receiving turf grass on a traveling machine body to which the mowing mechanism is attached, and a grass collecting box for receiving turf grass cut by the mowing mechanism. It is provided so as to be rotatable around a horizontal rotation support shaft so as to switch between a grass posture and a discharging posture for discharging the received turfgrass, and the grass collection box is a posture switch arranged on the traveling machine body side. It is configured to rotate and change posture by manual operation with a lever and a tension spring that applies a biasing force in a rotation direction in which the grass collection box is in a discharge posture following the operation, and the tension spring is wherein being configured so as to exceed fulcrum pivot shaft, the said grass collection box, the lever member rotates is provided with which when rotating switching the grass collection box to a discharge position Cage, the lever body, the is configured to rotate at manual operation of the discharging position direction of the posture switching lever by the compression spring operable position from the driver's seat of the vehicle body, turfgrass mass When the weight of the grass collection box is heavy, the grass collection box is gathered in the first discharge posture in which the receiving port of the grass collection box is inclined forward and downward by the upward rotation operation of the posture switching lever and the tension biasing force of the tension spring. When the grass box is supported , the lever body on the grass collection box side is configured to stand up to a position that can be reached from the driver's seat by the compression spring, while the posture switching lever is manually operated in the discharge posture direction. after the operator seated on the driver's seat, when the forward tilting of upstanding the lever body, depending on the tensile biasing force of the spring tension and the tilting operation force of the lever member , Which is constituted so as to force upward rotating the grass collection box to a downward second discharging position.

When configured as in the invention of the present application, the grass collection box is formed by manual operation by the posture switching lever on the traveling machine body side and the tension spring that applies a biasing force in a rotational direction in which the grass collection box assumes a discharge posture. Since the posture switching can be rotated, the posture of the grass collection box can be easily switched with a light operating force in normal turf grass discharge work, and the grass in the grass collection box can be discharged smoothly. .

In addition, when a large amount of moist turfgrass is stored in the grass collection box, if the operator manually rotates the lever body from above the traveling machine body , the grass collection box is completely directed downward. It is possible to forcibly rotate upward until the wet grass can be reliably discharged from the grass collection box.

  Therefore, the turfgrass can be reliably discharged from the grass collection box regardless of the state of the turf grass in the grass collection box (whether it is dry or wet).

In addition, since the lever body appears at a position where it can be operated from the driver's seat by operating the posture switching lever , even in a state where a large amount of wet turf grass is stored in the grass collection box, the operator The lever body can be manually operated while sitting on the driver's seat. Therefore, the lever body is easy to operate, and the workability of the traveling lawn mower is improved.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

  First, an outline of a traveling lawn mower will be described with reference to FIGS. 1 is an overall side view of the lawn mower, FIG. 2 is an overall plan view of the lawn mower, and FIG. 3 is a plan view showing a power transmission system of the lawn mower.

  As shown in FIGS. 1 and 2, the lawn mower traveling machine body 1 in this embodiment includes a body frame 2 having a gate shape in plan view. The body frame 2 is supported by front and rear four wheels 3, 3, 4, 4 arranged on the front and rear sides of the left and right sides.

  An engine 5 as a power source and a steering column unit 6 having a steering round handle 7 are mounted on the front upper surface of the traveling machine body 1. In the rear cowl 8 that covers the rear upper surface of the traveling machine body 1, there is a transmission case 9 such as an HST type (hydrostatic continuously variable transmission mechanism) that appropriately changes the output from the engine 5 and transmits it to the left and right rear wheels 4, 4. Is arranged (see FIG. 3).

  A driver seat 10 is provided on the rear cowl 8. When the operator sitting on the driver's seat 10 turns the steering round handle 7, the steering angles (steering angles) of the left and right front wheels 3 and 3 change according to the operation amount (turning amount). It is configured. On the left side of the driver's seat 10, a mower elevating lever 11 for elevating and operating a mower device 15 described later is provided so as to be able to rotate back and forth. On the right side of the driver's seat 10, a posture switching lever 12 that switches the posture of a grass collection box 22 to be described later is provided so as to be rotatable up and down. In this embodiment, the posture switching lever 12 corresponds to the first operation means described in the claims. A shift pedal 13 for adjusting the vehicle speed and a brake pedal 14 for braking the traveling machine body 1 are provided upright on the rear surface (rear surface) side of the steering column section 6.

  A mower device 15 as a cutting mechanism can be moved up and down via a pair of front and rear link rods 16 and 17 between the left and right front wheels 3 and 3 and the left and right rear wheels 4 and 4 on the lower surface of the body frame 2. It is installed. The mower device 15 is provided with a pair of left and right rotary cutting blades 19 and 19 that can rotate horizontally in a mower case 18 having a downward opening hook shape (see FIG. 3).

  Further, four gauge wheels 20 that adjust the height of the mower device 15 when lowered are attached to the front and rear sides of the left and right sides of the mower case 18. A duct portion 18 a extending rearward from the mower case 18 communicates with a grass collection box 22 disposed at the rear portion of the traveling vehicle body 1 via a discharge duct 21 disposed between the left and right rear wheels 4, 4 on the lower surface of the vehicle body frame 2. is doing.

  When each rotary cutting blade 19 is rotated in a state where the mower device 15 is placed on the ground, the turf grass planted on the ground is trimmed to a suitable height. Turf grass cut by each rotary blade 19 is accommodated in the grass collection box 22 from the mower device 15 via the discharge duct 21.

  Next, the power transmission system of the lawn mower will be described with reference to FIG. The lawn mower according to this embodiment employs a two-wheel drive system in which a part of the rotational power of the engine 5 is distributed to the left and right rear wheels 4 and 4.

  That is, a part of the rotational power of the engine 5 is forward from the rear end portion of the output shaft 23 protruding forward and backward outward from the engine 5 and the propulsion shaft 24 having universal joints at the front and rear ends and the transmission case 9. It is transmitted to the transmission case 9 via the traveling gear box 25 and the endless belt 26 arranged at the site.

  Then, left and right rear wheel drive shafts provided on the rear side of the traveling machine body 1 from a horizontal shaft (not shown) projecting outward in the left and right directions on the transmission case 9 via an endless chain (not shown). 29. As a result, the rear wheels 4 and 4 attached to the left and right ends of the rear wheel drive shaft 29 are rotationally driven.

  On the other hand, the other rotational power of the engine 5 is transmitted from the front end portion of the output shaft 23 to the PTO shaft 32 pivotally supported on the front portion of the body frame 2 via an endless belt 31 such as a power transmission belt. . Next, from the PTO shaft 32, an intermediate shaft 33 provided with universal joints at both front and rear ends, a mower gear box 34 disposed on the right side of the machine body frame 2 on the upper surface of the mower case 18, and an endless belt 35, Power is transmitted to the vertically long rotary shafts 36 and 36 rotatably supported on both sides of the mower case 18 across the body frame 2 in plan view. As a result, the left rotary cutting blade 19 is driven to rotate clockwise in plan view, and the right rotary cutting blade 19 is driven to rotate counterclockwise in plan view.

  Due to the rotation of the left and right rotary cutting blades 19, a conveying wind that flows backward from the mower case 18 toward the grass collection box 22 is formed. The conveying wind smoothly conveys the turf grass cut by the rotary cutting blades 19 to the grass collection box 22.

  Next, the structure of the grass collection box 22 will be described with reference to FIGS. 4 and 5. 4 is a side sectional view of the grass collecting box, and FIG. 5 is a VV plan sectional view of FIG.

  The grass collection box 22 has a substantially box shape with an open front. The grass collection box 22 includes a frame frame 39 constituting the framework, a fixing bracket 40 for detachably mounting the frame frame 39 to the left and right rear ends of the body frame 2, and a net or a net covering the periphery of the frame frame 39 A cloth bag body 41 is provided. A lid cover body 42 is attached to the upper surface of the grass collection box 22 to prevent dust passing through the mesh of the bag body 41 from turning around to the traveling machine body 1 side.

  The fixing bracket 40 includes a pair of sheath pipes 40a and 40a that are detachably fitted to the left and right rear ends of the body frame 2 and are screw-fixed, and a left and right longitudinal pipe member 40b that connects the two sheath pipes 40a and 40a. I have.

  Both ends of a horizontal rotation support shaft 43 that is rotatably inserted into the pipe member 40 b are fixed to portions of the upper portion of the frame frame 39 near the receiving port 22 a. Accordingly, the grass collection box 22 has a grass collection posture in which the receiving port 22a faces the discharge port 21a of the discharge duct 21 (a posture when the cut grass is received, see the solid line state in FIGS. 1 and 4), and a receiving port. 22a is configured to rotate up and down about the rotation support shaft 43 as a rotation center so as to switch to the (second) discharge posture (see the two-dot chain line state in FIGS. 1 and 4) facing the ground. .

  One end of the pivot shaft 43 is pivotable to the body frame 2 of the attitude switching lever 12 via the interlock mechanism 44 so as to rotate in conjunction with the up / down rotation operation of the attitude switching lever 12. It is connected to the supported horizontal shaft portion 12a.

  The interlocking mechanism 44 is a substantially rod-shaped connecting rod that connects the triangular arm 45 that is rotatably attached to one end of the rotary support shaft 43 and the transmission arm 48 that is fixed to the triangular arm 45 and the posture switching lever 12. 46 and an arm link 47 that is fixed to an outer side of the triangular arm 45 in one end portion of the rotation support shaft 43.

  In this embodiment, the connecting pin 50 is slidably inserted into the long slot 49 formed in the triangular arm 45 through the through hole formed in one end of the connecting rod 46 and cannot be removed. One end of the connecting rod 46 is connected to the triangular arm 45. The other end of the connecting rod 46 is pivotally attached to the transmission arm 48 by a pivot pin 51.

  In addition, the connecting pin 50 that connects the triangular arm 45 and the connecting rod 46 is also slidably inserted into the long slot 52 formed in the arm link 47 so that it cannot be removed. As a result, the triangular arm 45, the arm link 47, and the rotation support shaft 43 rotate together with the rotation support shaft 43 as a rotation center in conjunction with the up / down rotation operation of the posture switching lever 12.

  As shown in FIGS. 1, 2, 4, and 5, a rod-like lever body 70 as second operating means is disposed at one end further outside the arm link 47 of the rotation support shaft 43. In a state where the box 22 is in the grass collecting posture, the box 22 is fixed so as to extend rearward and obliquely upward from one end of the rotation support shaft 43 (so as to extend in a direction intersecting the rotation support shaft 43). Therefore, the lever body 70 rotates in the front-rear direction around the rotation support shaft 43 together with the rotation support shaft 43 (and thus the grass collection box 22) in conjunction with the up / down rotation operation of the posture switching lever 12.

  Further, when the lever body 70 is rotated in the front-rear direction, the grass collection box 22 rotates and switches its posture around the rotation support shaft 43.

  In this case, the attachment angle (attachment position) of the lever body 70 with respect to the rotation support shaft 43 is such that the hand can reach from the driver's seat 10 in the state where the grass collection box 22 is in the first discharge posture diagonally forward and downward. It is set so that it can be operated from the seat 10 (see the one-dot chain line state in FIGS. 1 and 4).

  As shown in FIG. 5, between the rotation support shaft 43 and each sheath tube 40a, the grass collection box 22 is urged so as to rotate upward in the direction of the first discharge posture (the direction of opening). A pair of compression springs 53 are attached symmetrically. A fulcrum crossing link 55 formed in an arc shape so as to bypass the rotation support shaft 43 is disposed symmetrically at the rear end of the body frame 2. A tension spring 54 is mounted between each fulcrum crossing link 55 and the upper front end of the grass collection box 22.

  In this embodiment, in order to reduce the operation force of the posture switching lever 12 as much as possible (to reduce the operation burden on the operator), the grass collection box 22 is switched to the discharge posture mainly by the biasing force of the springs 53 and 54 described above. It is configured to move. The biasing force of the pair of left and right tension springs 54 is smaller than the biasing force of each compression spring 53 when the grass collection box 22 is in the grass collection posture. When the grass collection box 22 is switched and rotated from the grass collection posture to the first discharge posture, both the tension springs 54 exceed the pivot shaft 43. Thereafter, the two tension springs 54 urge the grass collection box 22 so as to further rotate upward in the direction of the second discharge posture (the direction in which it opens). In this embodiment, the two compression springs 53 and the two tension springs 54 correspond to the urging means described in the claims.

  On the other hand, engagement links 57 are fixed to both ends of a latch shaft 56 that is pivotally supported at the lower front end of the grass collection box 22 (frame frame 39). Each engagement link 57 is configured to be engaged with and disengaged from a flange 58 provided at a lower portion of the rear end of the discharge duct 21 by rotating around the latch shaft 56. One of the engagement links 57 is connected to one top portion of the triangular arm 45 located above the engagement link 57 via a substantially rod-shaped linkage 59.

  On the other hand, a base end of an elastic clip 61 made of, for example, a leaf spring and having a Ω-shaped cross section is bolted to the front inner surface of the lid cover body 42. When the cover cover body 42 is placed over the grass collection box 22, the elastic clip 61 is rotatable with respect to the horizontal shaft portion 62a of the gate-type frame 62 erected upward on both the sheath tubes 40a, 40a and is detachable. It can be fitted. The horizontal shaft portion 62 a of the portal frame 62 is located above the rotation support shaft 43 and in the vicinity of the uppermost portion of the rear end edge of the rear cowl 8.

  A guide rail 63 having a generally longitudinal and downward opening and an approximately bowl-like shape is bolted to a substantially central portion of the inner surface of the rear portion of the lid cover body 42, while a pair of left and right rolling rollers are disposed at the upper rear end of the frame frame 39. 64 and 64 project upward. Each of these rolling rollers 64 is fitted between the contact plate portion 63a projecting outward from the left and right side surfaces of the guide rail 63 and the rear inner surface of the lid cover body 42 so as to sandwich the guide rail 63 from both the left and right sides. .

  Therefore, the rear end portion of the lid cover body 42 switches the posture of the grass collection box 22 by the rolling rollers 64 that roll between the contact plate portion 63a of the guide rail 63 and the rear inner surface of the lid cover body 42. It is supported from below in such a manner that it can be displaced relative to the front-rear direction as it rotates.

  In the above configuration, when the posture switching lever 12 is rotated upward, the transmission arm 48 rotates in the clockwise direction in FIG. 4 around the horizontal shaft portion 12a, so that the connecting rod 46 connected to the transmission arm 48 is The triangular arm 45 is rotated counterclockwise in FIG. Then, since the triangular arm 45 pulls up the linkage 59, the left and right engagement links 57 are disengaged from the flange 58 of the discharge duct 21, and the engagement is released.

Here, when the grass collection box 22 is in an empty state without turf grass or in a state close to the sky with little turf grass, the center of gravity of the grass collection box 22 is as shown by a symbol G in FIG. Therefore, the grass collection box 22 is rotated by the upward rotation operation of the posture switching lever 12 so that the receiving port 22a is inclined forward and downward. It becomes a discharge | emission attitude | position (refer the dashed-dotted line state of FIG.1 and FIG.4).

Next, by the further upward turning operation of the posture switching lever 12 , the left and right tension springs 54 exceed the pivot support shaft 43, and then the grass collection box 22 is pulled by the tension biasing force of both the tension springs 54 exceeding the fulcrum. It automatically rotates upward until the downward second discharging posture is reached (see the two-dot chain line state in FIGS. 1 and 4).

  Further, when the grass collection box 22 is clogged with a lot of turf grass, the gravity center of the grass collection box 22 is located behind the rotating support shaft 43 as shown by reference numeral G 'in FIG. Even if the posture switching lever 12 is pivoted upward to release the engagement between the flange piece 58 of the duct 21 and the engagement link 57, the grass collection box 22 does not move right and left because of its own weight including turf grass. The grass collecting posture (see the solid line state in FIGS. 1 and 4) is held against the compression spring 53.

  In this case, when the posture switching lever 12 is further rotated upward with a light operating force, the operating force and the pressing biasing force of the left and right compression springs 53 cooperate to bring the grass collection box 22 into the first discharge posture. Rotate upward until As a result, the turf grass in the grass collection box 22 is discharged to the ground. When the turfgrass has been discharged to a certain extent, the grass collection box 22 automatically rotates upward until it reaches the second downward discharge posture by the tensile biasing force of the left and right tension springs 54 that exceed the fulcrum.

  On the other hand, in a state where a large amount of wet turfgrass is accumulated and the weight of the grass collection box 22 becomes considerably heavy, the tensile urging force of the left and right tension springs 54 loses the weight of the grass collection box 22 and the wet turfgrass is collected. Combined with the manual operation by the posture switching lever 12 that can apply only a light operating force and the tension biasing force of the left and right tension springs 54 because it works together with the fact that it sticks to the bottom surface of the grass box 22 and is difficult to slide down. Even so, the left and right tension springs 54 cannot be moved beyond the fulcrum. In other words, the grass collection box 22 cannot be switched and rotated beyond the first discharge posture.

  In this case, the lever body 70 on the side of the grass collection box 22 is held at a position that rises substantially vertically so that the hand can be reached from the driver seat 10 in conjunction with the upward rotation operation of the posture switching lever 12 ( (Refer to the one-dot chain line state in FIGS. 1 and 4). Therefore, the operator twists the body to the rear right side of the driver's seat 10 and tilts the grass body box 22 downwardly by tilting the lever body 70 standing substantially vertically while sitting on the driver's seat 10. Forcibly turning upward to 2 discharge posture, the wet turf grass in the grass collection box 22 is naturally dropped by its own weight and discharged.

  After the grass is completely discharged and the grass collection box 22 is empty, the grass collection box 22 is returned to the forward grass collection posture by rotating the posture switching lever 12 downward. Then, when the triangular arm 45 rotates around the horizontal shaft portion 12a in the clockwise direction in FIG. 6 and pushes down the linkage 59, the right and left engagement links 57 are kicked into and engaged with the corresponding flanges 58, The grass box 22 is locked so as not to rotate.

  From the above, according to the traveling lawn mower of the present invention, the grass collection box 22 is obtained by the manual operation by the attitude switching lever 12 on the traveling machine body 1 side and the biasing force of the springs 53 and 54 in the direction of the discharging attitude. Therefore, in a normal turf grass discharge operation, the posture of the grass collection box 22 can be easily switched with a light operating force, and the turf grass in the grass collection box 22 can be discharged smoothly.

  In addition, even in a state where a large amount of moist turfgrass is accumulated in the grass collection box 22, the grass collection box 22 is moved by the upward rotation operation of the posture switching lever 12 and the pressing biasing force of the left and right compression springs 53. In the first discharge posture, the lever body 70 on the grass collection box 22 side appears at a position that rises substantially vertically so that the hand can reach from the driver's seat 10.

  Therefore, after that, the combination of the manual operation by the posture switching lever 12 and the tension biasing force of the left and right tension springs 54 does not allow the grass collection box 22 to be switched and rotated beyond the first discharge posture. If the lever body 70 that rises substantially vertically is tilted forward, the grass collection box 22 can be forcibly rotated upward to the second downward discharge posture. The turf grass can also be discharged reliably.

  That is, according to the traveling lawn mower of the present invention, the turfgrass can be reliably discharged from the grass collection box 22 regardless of the state of the turf grass in the grass collection box 22 (whether it is dry or wet). is there.

  Further, when the grass collection box 22 is set to the first discharge posture, the lever body 70 on the grass collection box 22 side appears in a substantially vertical position where the hand can reach from the driver seat 10 (sit on the driver seat 10). Therefore, even when a large amount of moist turfgrass is stored in the grass collection box 22, the operator manually operates the lever body 70 while sitting on the driver's seat 10 to discharge the turfgrass. Work can be done. Therefore, the lever body 70 is easy to operate, and the workability with the traveling lawn mower is improved.

  Furthermore, since the simple structure of the lever body 70 fixed to one end of the rotation support shaft 43 is adopted as the second operation means, it becomes a special situation such as when a large amount of turf grass is stored in the grass collection box 22. However, the number of parts is small and it is difficult to break down. In the state where the grass collection box 22 is in the grass collection posture, the lever body 70 extends rearward and obliquely upward from one end of the rotation support shaft 43. Therefore, the presence of the lever body 70 is obstructive during lawn mowing work or the like. Never become.

  The present invention is not limited to the above-described embodiment, and can be embodied in various forms. For example, the second operating means exemplified as the lever body 70 in the above-described embodiment may be provided integrally with the rotation support shaft 43 of the grass collection box 22 or may be provided separately. Alternatively, the frame frame 39 may be provided integrally or separately. In short, the second operating means may be disposed on the grass collection box 22 side.

1 is an overall side view of a traveling lawn mower. 1 is an overall plan view of a traveling lawn mower. It is a top view which shows the power transmission system of a traveling type lawn mower. It is a sectional side view of a grass collection box. FIG. 5 is a VV plan sectional view of FIG. 4.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Machine body frame 5 Engine 10 Driver's seat 12 Posture switching lever 15 as the first operating means 15 Mower device 18 as mowing mechanism Mower case 19 Rotary cutting blade 20 Gauge wheel 21 Discharge duct 22 Grass collection box 39 Frame frame 40 Fixed bracket 42 Lid cover body 43 Rotating support shaft 44 Interlocking mechanism 53 Compression spring 54 as urging means Tension spring 55 as urging means Linking link 70 Lever body as second operating means

Claims (1)

A horizontal rotation support is provided so that the grass box that receives the turf grass cut by the cutting mechanism is switched to the collecting posture that receives the turf grass and the discharging posture that discharges the received turf grass to the traveling aircraft that is equipped with the cutting mechanism. It is provided so that it can rotate around its axis.
The grass collection box has a posture by a manual operation by a posture switching lever disposed on the traveling machine body and a tension spring that applies a biasing force in a rotational direction in which the grass collection box is in a discharge posture following the operation. The tension spring is configured to be able to pass over the pivot shaft when the grass box is switched to a discharge posture and rotated.
The grass collection box is provided with a lever body that rotates together with the lever box, and the lever body can be operated from the driver seat of the traveling machine body by manual operation of the attitude switching lever in the discharge attitude direction. It is configured to rotate with a compression spring ,
In a state where there is a large amount of turfgrass and the weight of the grass collection box is heavy, the first discharge in which the receiving port of the grass collection box becomes obliquely downward forward by the upward rotation operation of the posture switching lever and the tension biasing force of the tension spring. When the grass box is supported in the posture, the lever body on the grass box side is configured to stand up to a position that can be reached from the driver's seat by the compression spring ,
When the operator sitting in the driver's seat tilts the lever body that has stood up forward after the manual operation of the posture switching lever in the discharging posture direction, the lever body tilting force and the tension spring biasing force and the traveling-behind lawnmower, characterized by being configured so as to force upward rotating the grass collection box to a downward second discharging position.

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