JP2011147350A - Lawn grass collector - Google Patents

Abstract

The present invention provides a grass collecting device for turf grass that can effectively use the space of a storage container for storing the cut grass and improve the efficiency of the grass cutting operation.
SOLUTION: A storage container 66 provided at the front with an open part 67 for storing turf grass cut by a mower 13 provided in a traveling vehicle body 1, a working posture for storing turf grass in the storage container 66, and the working posture And a posture switching means (69 or 172) for switching to a discharge posture for discharging turf grass from the working position, the posture switching means (69 or 172) inclines the container 66 backward and downward from the working posture and moves the turf grass in the vicinity of the opening 67. It is a turfgrass collecting device having a turfgrass movement function for moving it from the rear to the rear. Since the turfgrass in front of the storage container 66 moves rearward, the space of the storage container 66 can be used effectively, and the mowing and collecting work can be continued. Moreover, the container 66 can be filled, the number of turf grass discharge operations is reduced, and the work efficiency is improved.
[Selection] Figure 6

Description

  The present invention relates to a configuration of a grass collecting apparatus that is mounted on a lawn mower or the like and accommodates cut grass.

A conventional lawn mower with a mower attached to the front or lower part of the vehicle body blows and conveys the grass (cutting grass) mowered to the collector (container) at the rear of the vehicle body via a shooter (duct) arranged below the vehicle body. It is configured to collect grass.
The mower is provided with a rotary blade (cutting blade) composed of double blades or triple blades, and grass such as turf is cut with these rotary blades. The cut turfgrass is blown to the rear shooter and collector by the momentum of the rotary blade.

  The shooter is provided in the middle portion of the mower in the left-right direction, and has a longitudinal direction in the front-rear direction to form a turfgrass transport passage. The bottom surface of the shooter has a rear upward slope in a side view, that is, it is higher from the front to the rear. And the turf grass which passed the shooter is accommodated in a collector from the accommodation port formed in the front part of the collector. Turfgrass enters from the collector opening, and when it is full, it rotates with the upper rear end of the collector as a fulcrum, and turfgrass in the collector is discharged from the front of the collector.

  The following Patent Document 1 discloses a collector whose rear portion is in a rear-up position at the time of lawn mowing work. With this configuration, the rear end portion of the collector does not come into contact with the ground even when working on an inclined ground. Therefore, there is no fear of deforming the collector when working on an inclined ground with many irregularities.

  In addition, a lifting link mechanism is provided at the connecting part between the traveling vehicle body and the collector so that the collector moves up and down with respect to the traveling vehicle body, and the turf grass is discharged from a relatively high position by moving the collector upward when discharging the turf grass. There is also a lawn mower (high dump). In this type of riding lawn mower, when the collector is full after the mowing operation is completed, the collector is lifted upward to release the grass in the collector from a high position. It may spill from the storage port. In particular, when the rear part of the collector is in a rear-up position, turf grass tends to spill from the storage opening in the front part of the collector when the collector is lifted upward.

  In Patent Document 1 below, in order to prevent such turf grass from falling down, when the collector is lifted upward after the mowing operation, the opening (accommodating port) provided on the collector front surface is in an upward posture. The configuration supported in the above is disclosed.

JP 2005-130799 A

According to the turfgrass collecting apparatus described in Patent Document 1, the above-described configuration allows the work on the slope to be performed with peace of mind, and prevents the turfgrass in the collector from falling down even when the collector is lifted upward. it can.
On the other hand, turf grass cut by the mower's rotary blade is blown backward by the force of the rotary blade, but the bottom surface of the shooter is upwardly inclined in a side view, and the rear part of the collector is also in a rear-up position. Then, turfgrass finally reaches the inside of the collector as it goes up the slope.

  Therefore, turfgrass is relatively easy to collect in the front part of the collector, and turfgrass may be clogged in the vicinity of the collector opening. In such a case, even if the collector has a sufficient capacity (space), it cannot be used effectively, and the mowing operation must be temporarily stopped. Then, it is necessary to insert something like a scraping bar from the top of the collector and bring the collected grass backward.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a turfgrass collecting apparatus that can effectively use the space of a storage container that accommodates cut turfgrass and that improves the efficiency of cutting and collecting work.

The above-mentioned problem of the present invention is solved by the following means.
According to the first aspect of the present invention, there is provided a mower (13) provided in the traveling vehicle body (1), and an open portion provided behind the mower (13) for accommodating turf grass cut by the mower (13). A storage container (66) provided with (67) at the front, and a posture switching means (69 or 172, etc.) for switching between a working posture for housing turf grass in the housing container (66) and a discharge posture for discharging turf grass from the working posture The posture switching means (such as 69 or 172) moves turfgrass that moves the container (66) tilted rearward and downward from the working posture to move the turfgrass backward from the vicinity of the opening (67). It is a grass collecting device with a function.

  The invention according to claim 2 is provided between the housing container (66) and the traveling vehicle body (1), and when the discharging posture is taken, the housing container (66) is moved from a predetermined position in the working posture to the traveling vehicle body (1). And a vertical movement means (146, 160, 162, 169, etc.) for lowering the container (66) from the raised position and returning it to the predetermined position in the working posture, and the container (66) A discharge port (66a, 66b) for discharging turfgrass in the storage container (66) and an opening / closing means (172, 215, etc.) provided outside the discharge port (66a, 66b). And a door part (70) of the storage container (66), and opening / closing means (172, 172) when the storage container (66) is tilted backward and downward by the turfgrass moving function at a predetermined position in the working posture. 215) Door part restricting means (200, 203, 210, etc.) for restricting the opening movement, and the door part restricting means in conjunction with the rising of the container (66) by the vertically moving means (146, 160, 162, 169, etc.) Door part restriction release means (160, 162, 205, 207, etc.) for releasing the opening restriction of (200, 203, 210, etc.), and the posture switching means (172, etc.) 160, 162, 205, 207, etc.) The opening / closing means (172, 215, etc.) are interlocked with the rearward downward tilting operation of the container (66) by the turfgrass movement function. The turfgrass collecting apparatus according to claim 1, having a turfgrass discharge function for discharging the turfgrass in the storage container (66) from the discharge port (66a, 66b) by being opened by .

  According to a third aspect of the present invention, the posture switching means (172, etc.) includes an expansion / contraction cylinder (172) provided between the inner surface of the door portion (70) and the wall surface of the receiving container (66), and the turfgrass movement The function is a function exerted by extension of the telescopic cylinder (172), and the opening / closing means (172, 215, etc.) of the door part (70) is a first part whose one end part is connected to the inner surface of the door part (70). A link (215a), a second link (215b) having one end connected to the door (70) side end of the telescopic cylinder (172), the other end of the first link (215a) and a second link ( 215b) and the first link (215a) and the second link (215b) on the first link (215a) and the second link (215b). ) Is allowed to break Is a connecting portion (S) between the first link (215a) and the second link (215b), and is slidable to a position where the first link (215a) and the second link (215b) are linear. And an open / close mechanism (172, 215a, 215b, 223, etc.) provided with a slide member (217), and the open / close mechanism (172, 215a, 215b, etc.) includes the vertical movement means (146, 160, 162, 169). The slide member (217) slides in conjunction with the rising of the container (66) due to the first link from the position allowing the first link (215a) and the second link (215b) to be bent halfway. (215a) and the second link (215b) are switched to a linear position and connected to the backward downward tilting operation of the container (66) due to the extension of the telescopic cylinder (172). It is a lawn grass grass collecting device according to claim 2, wherein the door portion (70) is a mechanism for opening-and.

  According to a fourth aspect of the present invention, the posture switching means (69) has a gripping portion (69a) at an upper end portion, and a lower portion of the gripping portion (69a) is connected to the storage container (66). The turfgrass collection as claimed in claim 1, wherein the container (66) is a lever (69) for tilting in the front-rear direction by two supporting points of the front upper end (K1) and the rear upper end (K2) of the storage container (66). Device.

  According to the first aspect of the present invention, the posture switching means (69 or 172) for switching the turfgrass container (66) between the work posture and the discharge posture inclines the container (66) downward from the working posture. The turfgrass moving function for moving the accommodated turfgrass backward from the open part (67) prevents the turfgrass from being discharged from the open part (67), and the turfgrass in the front of the container (66) Since the turfgrass is compressed by moving to the front, there is an empty space in the front of the storage container (66), the space of the storage container (66) for storing the cut turfgrass can be used effectively, and the grass cutting work can be continued. It becomes. Further, since the container (66) can be filled, the number of turf grass discharge operations is reduced, and the work efficiency is improved.

  According to the second aspect of the present invention, since the opening of the door part (70) is restricted by the door part restricting means (200, 203, 210, etc.) in the working posture state, the receiving container (66) is moved backward. The turf grass in the container (66) is not discharged even if it is inclined downward. On the other hand, when the storage container (66) is raised by the vertical movement means (146, 160, 162, 169, etc.) and the storage container (66) is inclined downward in the upward state, the door part restriction release means (160, 162, 205). , 207, etc.) and door part opening / closing means (172, 215, etc.), the door part (70) is opened and the turf grass in the container (66) is discharged.

  Therefore, according to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the turf grass accommodated in the accommodating container (66) can be moved rearward from the open portion (67) in the working posture. Since the opening of the door part (70) is restricted, the storage container (66) can be filled without the turf grass falling down, and the cut turf grass can be collected efficiently. On the other hand, since the door part (70) opens at the time of discharge | emission attitude | position, the turf grass in a storage container (66) can be discharged | emitted rapidly.

  Further, according to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the first link (215a) and the second link (215b) are provided at a position that allows the middle bent state. The first link (215a) and the second link (215b) are linear when the slide member (217) is interlocked with the rising of the container (66) by the vertical movement means (146, 160, 162, 169, etc.). The sliding portion can be switched to a position extending to, and the door portion (70) can be easily opened by the extension of the telescopic cylinder (172), so that the turfgrass in the container (66) can be discharged quickly (turfgrass discharge). function). Since the turf grass discharge is linked to the rising of the container (66) by the vertical movement means (146, 160, 162, 169, etc.) and the expansion of the telescopic cylinder (172) in this way, no special operation is performed. The turf grass discharge operation in the storage container (66) can be easily performed.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 1, when the lever (69) is operated with the rear upper end (K2) of the container (66) as a fulcrum, the container (66) Since the front turfgrass moves backward and compresses the turfgrass, an empty space is created in the front of the storage container (66), and the space of the storage container (66) that stores the cut turfgrass can be used effectively. At the same time, cutting and collecting work can be continued. On the other hand, when the lever (69) is operated with the front upper end (K1) of the storage container (66) as a fulcrum, the turf grass in the storage container (66) is opened from the open portion (67) provided at the front of the storage container (66). Can be discharged. That is, a single lever (69) can be used to perform a rearward movement operation (turfgrass movement function) of the turfgrass in the container (66) during the cutting and collecting operation and a discharge operation (turfgrass discharging function) after the cutting and collecting operation. The configuration is simple, and both operations and operations can be performed easily.

It is a side view of the riding-type lawn mower carrying the grass collecting apparatus of one embodiment of the present invention (low dump specification). FIG. 2 is an enlarged side view mainly showing a power transmission system in FIG. 1. It is a top view of the power transmission structure of FIG. 4 (a) is a perspective view of the collector bag of FIG. 1, and FIG. 4 (b) is a perspective view of a support frame that supports the collector bag. It is a side view of a riding-type lawn mower when the collector bag is rotated. It is a side view of the riding lawn mower of other embodiments of the present invention (high dump specification). FIG. 7 is a detailed view of the collector indicated by a two-dot chain line in FIG. 6. It is a side view of a collector when raising a collector. FIG. 9 is a side view of the collector when the collector turf is discharged by tilting the collector bag from the state of FIG. 8. It is detail drawing for demonstrating the connection relation of a raising / lowering link and a slide lock mechanism. It is a block diagram of a slide lock mechanism. It is the figure which added the cover of the conventional collector bag to the collector of FIG. It is a control block diagram of the grass collecting apparatus of one Embodiment of this invention. It is an example of the control flow of the grass collecting apparatus of one Embodiment of this invention. It is a figure at the time of providing a cover in the raising / lowering hydraulic cylinder of a collector. FIG. 2 is a side view of the riding lawn mower when the composition around the fuel tank of the riding lawn mower shown in FIG. 1 is changed. It is a rear view of the lower part of the step sheet of FIG.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a side view of a riding lawn mower equipped with a grass collecting device according to an embodiment of the present invention, and FIG. 2 shows a side view of a power transmission configuration to a mower part and wheels. A plan view of the power transmission configuration is shown in FIG.
In this specification, the left and right directions are referred to as left and right, respectively, facing the forward direction of the riding lawn mower, the forward direction is referred to as the front, and the reverse direction is referred to as the rear.

A front axle 24 having a pair of left and right front wheels 23 is swingably supported around a center pivot 25 on the lower front side of the vehicle body 1, and a rear axle housing 4 having a pair of left and right rear wheels 26 is supported on the lower rear side. To do. By driving rotation of the engine output shaft 3 of the engine 27 mounted on the front end of the vehicle body 1, the main transmission shaft 6 connected to the rear side of the engine output shaft 3 is transmitted to drive the rear wheel 26 in conjunction with driving. be able to. The engine output shaft 3 is provided at the center in the left-right width direction at the lower part of the engine body and along the upper part of the center line L (FIG. 3) along the front-rear direction of the center part of the vehicle body 1 width. A flywheel 28 is attached to the front end portion of the engine output shaft 3, a radiator 29, a radiator fan 30 and the like are disposed on the rear side of the engine 27, the upper portion is covered with a bonnet 31, and an oil tank is disposed on the rear side thereof. 32, a handle 34 is provided on the steering post 33, and the front wheel 23 is steered and linked.
Between the front wheel 23 and the rear wheel 26, there is provided a mower deck (lawn mower) 13 in which a pair of left and right blades 54 for mowing the lawn are provided.

  The rear axle housing 4 is formed with a differential case 35 in which a rear wheel differential gear mechanism is installed at a position closer to one side of the tread (left side in the present embodiment, the same applies hereinafter) with respect to the center line L. A hydraulic continuously variable transmission (HST) case 8 is integrally configured, and the HST input shaft 9 is protruded directly upward from the case 8 so that the pulley 36, the cooling fan 37, and the like rotate integrally. A trunnion shaft mechanism 38 for HST control is disposed behind the input shaft 9.

  A rear wheel 26 is mounted on both ends of a rear axle 39 built in the rear axle housing 4. Then, the upper end of the rear bracket 40 erected from both the left and right sides of the rear axle housing 4 is connected by a connecting frame (not shown), and a fuel tank 42 for the engine 27 is mounted on the upper side of the connecting frame, Further, a step sheet 43 is provided on the upper side.

A step floor 2 is laid on the upper side of the vehicle body 1 and the main transmission shaft 6, and a seat floor 44 bent upward is connected to the rear portion of the step floor 2, and the rear end portion is fixed on the connecting frame. Fenders 45 are formed on both the left and right sides.
The main transmission shaft 6 has a first transmission shaft 6a having a start end connected to the engine output shaft 3 and a first end connected to the rear end via a first joint member 71 (FIGS. 2 and 3). The second transmission shaft 6 b is connected to the transmission system in the rear case 5.

The main transmission shaft 6 has a configuration in which a pulley 53 described later is fixed to the front portion of the second transmission shaft 6b, a rear end is extended into the rear case 5, and a bevel gear 48 is mounted.
A PTO shaft 11 that transmits the power of the main transmission shaft 6 to a blade 54 in the mower deck 13 is provided obliquely below the main transmission shaft 6. The PTO shaft 11 is provided with a pulley 52 fixed thereto, and the pulley 52 and the pulley 53 of the second transmission shaft 6b are wound around the belt 12 to thereby receive the power of the second transmission shaft 6b. The fourth transmission shaft 11b is connected to the third transmission shaft 11a via the second joint member 72 (FIGS. 2 and 3). The transmission terminal portion of the fourth transmission shaft 11b is connected to the input shaft 15 of the mower deck 13 via a third joint member 73 (FIGS. 2 and 3).

The order of transmitting power to the blades 54 in the mower deck 13 is the order of the first transmission shaft 6a, the second transmission shaft 6b, the belt 12, the third transmission shaft 11a, the fourth transmission shaft 11b, and the input shaft 15.
The transmission structure for transmitting power to the rear wheel 26 is such that the lower side of the step floor 2 of the vehicle body 1 extends along the front-rear direction from the engine output shaft 3 mounted on the front portion of the vehicle body through the rear axle housing 4 and on the rear side. A main transmission shaft 6 extending over the rear case 5 is provided, and a rear output shaft 7 hanging from the rear case 5 and an HST input shaft 9 on an HST case 8 disposed on the rear side of the rear axle housing 4 (left side in this example). The rear output shaft 7 and the HST input shaft 9 are interlocked with a belt 10 interposed therebetween.

  As shown in FIG. 2, the power of the input shaft 9 of the HST case 8 disposed at the rear of the rear axle housing 4 is transmitted from the rear output shaft 7 of the rear case 5 to the belt 10 (FIG. 2). The drive rotation of the front engine output shaft 3 is transmitted to the rear output shaft 7, the belt 10 and the like at the rear end portion via the main transmission shaft 6 biased to one side portion of the center line L of the vehicle body 1, and the HST input shaft. 9, and the PTO shaft 11 is transmitted through the belt 12 from the middle portion of the main transmission shaft 6. A structure in which a hydraulic PTO clutch 90 (FIG. 13) is housed in a support metal 51 to be described later, and a structure in which the PTO clutch 90 is switched to connection or disconnection by a switching operation of the PTO valve 267 of the PTO clutch lever 260 (FIG. 13). It has become.

  At the rear end of the vehicle body 1 is mounted a collector 16 that accommodates turfgrass fed from the mower deck 13 by the rotating action of the blades 54 and sent. Turf grass mowed by the mower deck 13 is disposed on the opposite side to the PTO shaft 11 (fourth transmission shaft 11b) connected to the front side of the main transmission shaft 6 and the PTO shaft 11 (third transmission shaft 11a) from the discharge port 20. It is carried into and accommodated in the collector 16 via the duct 22.

The rear case 5 of the input shaft (bevel gear) 48 (FIG. 2) for connecting the rear end of the second transmission shaft 6b is attached to and supported by the connection bracket 47 connected to the rear bracket 40, and the second transmission shaft. A metal 49 (FIGS. 1 and 2) for bearing 6b is attached and supported.
The rear case 5 is provided with an interlocking vertical rear output shaft 7 via a bevel gear 48 and protrudes downward to fix a pulley 50. The pulley 50 is disposed at the same height position on the rear side of the pulley 36 of the input shaft 9 of the HST, and is transmitted across the belt 10. The rear end of the PTO shaft 11 is supported by a metal 51 protruding from the left end front portion of the rear axle housing 4. A PTO clutch 90 is housed inside the metal 51, and the belt 12 is stretched between the fixed pulley 52 and the upper main transmission shaft 6 and the fixed pulley 53, and the PTO shaft 11 is transmitted and rotated. The PTO shaft 11 is provided at the lower left outer side with respect to the upper main transmission shaft 6, and is disposed so as to be opposed to a portion immediately behind the input shaft 15 on the front mower deck 13.

  The mower deck 13 is a mid-mount configuration that is mounted on the abdomen of the vehicle body 1 and is biased to the left and right sides with respect to the center line L, and a pair of left and right blade shafts 14 are mounted on the lower end of each blade shaft 14. It has a blade 54 for cutting turfgrass. The mower deck 13 has gauge wheels 55 and 56 arranged at the front and rear lower ends, and a discharge cylinder 77 for guiding the cut grass to the discharge port 20 at the center rear is formed at the upper center. The mower deck 13 has a pair of left and right parallel front links 57 and a rear link 58 arranged on the upper part, and is suspended from the vehicle body 1 and is moved up and down while maintaining a horizontal state by a lift mechanism. . In addition, blade cases 59 and 60 are provided on the upper part of the left and right blade shafts 14 on the mower deck 13, and the input shaft 15 is pivotally supported on the left blade case 59, and the blades directly below the blade shafts 59 via bevel gears 48. The shaft 14 is interlocked. The power is transmitted from the blade case 59 to the blade case 60 by the blade transmission shaft 62.

  The collector 16 is attached to the rear end of the vehicle body 1. A detachable attachment frame 63 (FIG. 1) is provided at the rear end of the vehicle body 1, and support frames 101 for supporting a collector bag (accommodating container) 66 are provided at two positions on the left and right of the attachment frame 63 (FIG. 1). 4 provided with recesses 101a (FIG. 4) at two locations in the front-rear direction of each support frame 101, and rods 80 projecting from the bag frame 68 on the upper side of the collector bag 66 in the four recesses 101a on the front and rear sides. Lock. The support frame 101 is L-shaped in a side view, and the front part is fixed to the mounting frame 63 (FIG. 1).

  The collector bag 66 has an open front surface, and conveys and guides turf grass discharged from the discharge port 20, and passes through the upper right side of the rear axle housing 4 from the duct 22 through the open portion 67 (FIG. 4). 66.

  The collector bag 66 is formed by forming a bag frame 68 along the outer peripheral corner portion and covering the outer periphery of the bag frame 68 with a wind cloth. The front surface of the collector bag 66 is in an open state (there is no wall surface), turf grass is accommodated from the open portion 67, and the conveying wind is discharged from the mesh portion of the net cloth. Further, the accommodation turfgrass is opened and accommodated by operating the handle lever 69 projecting above the collector bag 66 and turning it upward (takes a forward leaning posture) so that the opening 67 is opened downward. The turf grass can be dropped and discharged. The upper side of the collector bag 66 is covered with a cover 70.

  When the collector bag 66 is in the turfgrass accommodation posture (working posture) position, the upper side surface (not shown) in the collector bag 66 can be formed as a downwardly inclined surface so that there is no residual turfgrass during the discharging operation. .

4A shows a perspective view of the collector bag 66 of FIG. 1, and FIG. 4B shows a perspective view of the support frame 101 that supports the collector bag 66. As shown in FIG.
The riding lawn mower collector 16 shown in FIG. 1 is a side view of the riding lawn mower when two rotation fulcrums of the collector bag 66 are provided in the front-rear direction by operating the handle lever 69. Further, FIG. 5 shows a side view of the riding lawn mower when the collector bag 66 shown in FIG. 1 is rotated.

  As shown in FIG. 4, a reinforcing frame 81 is provided on one side (right side in the illustrated example) of the collector bag 66 so as to extend between the upper and lower bag frames 68. A bracket 83 that is slidably inserted along the longitudinal direction of the lever 69 is provided. Then, the handle lever 69 is inserted into the lower end bracket 83, and the handle 69a of the handle lever 69 is lifted upward (in the direction of arrow A) and the handle lever 69 is pulled out from the lower end bracket 83, and in the direction of arrow B (or in the direction of arrow B). It can be operated by switching to an action posture that rotates in the opposite direction) and gains a rotational moment.

  When the handle lever 69 is tilted in the direction of arrow B (forward), the collector bag 66 rotates in the direction of arrow C with the rod 80 on the front side and the locking portion K1 (FIG. 1) of the recess 101a as a pivot, and the handle lever 69 Is tilted in the direction opposite to the arrow B direction (rear), the collector bag 66 rotates in the direction of arrow D with the rear rod 80 and the engaging portion K2 of the recess 101a as the rotation fulcrum.

  When the handle lever 69 is tilted in the direction of arrow B (forward), the collector bag 66 is rotated rearward and upwardly around the locking portion K1, thereby causing the collector bag 66 to take a forward tilted posture (Y position indicated by the alternate long and short dash line, lever 69 is in the front), and the turf grass accommodated can be dropped and discharged with the opening 67 facing downward (turf grass discharge function). On the other hand, when the handle lever 69 is tilted in the direction opposite to the arrow B direction (rearward), the collector bag 66 turns to the upper front around the locking portion K2, so that the collector bag 66 takes a rearward inclined posture (shown by a solid line). Z position, lever 69 is behind), turf grass in front of collector bag 66 can be moved backward (turf grass movement function), and turf grass is compressed, so there is an empty space in front of collector bag 66 Thus, the space of the collector bag 66 that accommodates the cut turf grass can be used effectively, and the cutting and collecting work can be continued. Further, the collector bag 66 can be filled and the number of turf grass discharge operations is reduced, so that the work efficiency is improved.

  Needless to say, the collector bag 66 can be tilted forward or backward from the illustrated Y position or Z position. Although not shown in the drawings, the rear bottom surface of the duct 22 is formed of an elastic body, or a member such as an elastic body is provided between the collector bag 66 and the duct 22, so that even if the collector bag 66 tilts backward, Interference between the front end portion of the bag 66 and the rear portion of the duct 22 is reduced.

  By adopting this configuration, the same (one) handle lever 69 can obtain two postures, a discharge posture (forward tilt posture) and a moving compression posture (back tilt posture). Conventionally, there has been nothing but discharging the turfgrass by a forward leaning posture in which the handle lever 69 is operated to rotate the collector bag 66 to the upper rear part, but the collector bag 66 is rotated to the upper front part by the same handle lever 69 in this way. By allowing the rearward tilting posture to be moved, turfgrass can be discharged and moved and compressed with a simple configuration, and the filling rate of the collector bag 66 is improved. Further, in the case of only the conventional discharging posture, the collector bag 66 was filled up immediately and the turf grass had to be discharged, but according to this configuration, more turf grass can be accommodated than in the conventional case. Therefore, the number of operations for discharging turf grass is reduced. In addition, it is not necessary to bother a thing like a scraping bar from the top of the collector bag 66 and bring the grass to the rear, and the efficiency of the cutting operation is improved.

The collector 16 shown in FIG. 1 to FIG. 5 is a so-called low dump specification, and rotates the grass at a relatively low position near the ground to discharge the stored grass. Then, by operating the handle lever 69, the collector bag 66 rotates about the locking portion K1 (FIG. 1), and the accommodated turf grass is dropped and discharged.
On the other hand, a single-acting hydraulic cylinder (not shown) is interposed between the fuselage and the upper front portion of the collector bag 66, and the collector bag 66 is extended and contracted by extending and contracting the hydraulic cylinder. You may make it rotate centering | focusing on FIG.

FIG. 6 shows a side view of a riding lawn mower according to another embodiment of the present invention.
The riding lawn mower shown in FIG. 6 has a so-called high dump collector 16 attached thereto. The high dump collector 16 has a high discharge position for dropping mowed grass onto a loading platform for a truck or the like. The mast portion 146 is long, and two link mechanisms (elevating links 160 and 162) and elevating A hydraulic cylinder 169 for dumping and a hydraulic cylinder 172 for dumping. The moor deck 13 is attached by a link mechanism 116 so as to be movable up and down. This link mechanism 116 is provided with a pair of front and rear link pieces 116a, 116b and constitutes a parallel link, and the mower deck 13 is moved up and down in a state of being substantially parallel to the ground by the lifting operation of the tow rod 117. Can do.
The mower deck 13 is moved up and down by a manual lever operation but by an actuator such as an electric motor or a hydraulic cylinder. The lifting operation may be a lever or a switch operation.

7 shows a detailed view of the collector 16 indicated by a two-dot chain line in FIG. 6, FIG. 8 shows a side view of the collector 16 when the collector 16 is raised, and FIG. The side view of the collector 16 when inclining the collector bag 66 from a state and discharging accommodation turf grass is shown.
The high dump collector bag 66 will be described with reference to FIGS.
Two elevating links 160 and 162 are pivotally attached to two upper rotation fulcrums 158 and 159 provided on the left and right masts 146 and 146.

  The two elevating links 160 and 162 are bent downward at the rear part, and the vertical links 163 and 163 are formed at the lower ends of the lower rotation fulcrums (connection parts) 164 and 165 at the rear end parts. It is attached. The distance between the lower pivot fulcrums 164 and 165 is shorter than the distance between the front upper pivot fulcrums 158 and 159, and the fulcrum 159 of the lower link 162 is smaller than the distance between the fulcrums 158 and 164 of the upper link 160. The distance between 165 is shorter.

  This is because the rear part of the collector bag 66 is inclined higher than the front part during operation (FIG. 7), and the front part of the collector 40 is inclined higher than the rear part when the elevating links 160 and 162 are raised (FIG. 8). It is to make it. The collector bag 66 is pivotally supported by a fulcrum 168 provided at an intermediate portion of the vertical links 163 and 163. An elevating hydraulic cylinder 169 is installed between the lower portions of the masts 146 and 146 and the lower links 162 and 162, and operates by operating the hydraulic elevating lever 255 (FIG. 13) to open the ascending oil passage of the elevating valve 265. When the oil is introduced into the hydraulic cylinder 169, the collector 16 is raised, and conversely, when the hydraulic lifting lever 255 is operated to the lower side, the rising oil path of the lifting valve 265 is closed and the lowering oil path is opened to open the hydraulic cylinder 169. The hydraulic oil is discharged to the tank side and the collector 16 is lowered. These left and right masts 146, 146, elevating links 160, 162, elevating hydraulic cylinder 169, and the like function as vertical movement means for collector 16 (collector bag 66).

  The state of FIG. 7 is a turfgrass accommodation posture (cutting work posture), and the state of FIG. 8 is a discharge posture at the time of ascent. As is apparent from these drawings, the rear portion of the collector bag 66 is supported in the upright position in the working posture, so there is no fear that the rear portion of the collector bag 66 abuts on the ground, and the collector bag 66 can be operated in an inclined place. It is possible to eliminate problems such as deformation by hitting the ground. On the contrary, when hydraulic oil is supplied into the hydraulic cylinder 169 and the collector 16 is raised, it rises forward, so that the problem of grass spilling from the opening 67 provided on the front surface of the collector bag 66 can be eliminated.

  On the outside of the collector bag 66, there is a frame 170 formed integrally with the collector bag 66. The frame 170 has an inverted T-shape when viewed from the side, and the collector bag 66 is formed on the long side 170a. A rotation fulcrum 168 is provided, and a hydraulic cylinder 172 for dumping is interposed between the upper portions of the vertical links 163 and 163 and the short side 170b of the frame 170. When the dumping hydraulic cylinder 172 is extended, the collector bag 66 is rotated clockwise about the fulcrum 168.

  The collector bag 66 of the high dump specification has a large opening on the upper surface and the rear surface, and discharges the stored cut grass from the opening. Normally, both the upper surface and the back surface are covered with the resin cover 70, and the grass does not fall down from the upper opening 66a and the back opening 66b. In the cover 70, the upper horizontal portion 70a and the rear vertical portion 70b may be integrated, or may be divided into two parts in the front and rear.

Next, turf grass collection work will be described.
At the position where the collector 16 is lowered to the lowest position (the turfgrass accommodation posture position, also referred to as the working position), the rear portion of the collector bag 66 is supported in a raised position (state shown in FIG. 7) and cut by the blade 54 of the mower deck 13. The turfgrass is conveyed by the rotating action of the blade 54 and fed into the collector bag 66, but the bottom surface of the duct 22 is inclined upwardly in a side view, and the rear part of the collector bag 66 is also in a rearwardly raised posture. The turfgrass finally reaches the inside of the collector bag 66 as it goes up the slope.

  Accordingly, turfgrass is relatively easily collected in the front portion of the collector bag 66, and the turfgrass may be clogged in the vicinity of the open portion 67 serving as an entrance for accommodating the turfgrass. In such a case, even if the collector bag 66 has a sufficient capacity (space), it cannot be used effectively, and the mowing operation must be temporarily stopped. Then, it is necessary to insert something like a scraping bar from the top of the collector and bring the collected grass backward.

  In the shortened state of the lifting cylinder 169 shown in FIG. 7, the lifting links 160 and 162 are lowered, and the collector bag 66 is also in the working posture (working position). Therefore, when the hydraulic cylinder 172 for dumping is extended, the collector bag 66 tilts backward around the rotation fulcrum 168 (connected to the T-shaped frame 170). At this time, the pin 70 on the cover 70 side and the hook 203 on the collector bag 66 side maintain the engaged state so that the cover 70 is not opened.

  A bracket 205 having a longitudinal direction in a direction substantially perpendicular to the longitudinal direction of the lower link 162 is fixed to the lower link 162 of the elevating links 160 and 162, and an end portion of the bracket 205 on the upper link 160 side (illustrated example). Then, the end of the wire 207 for locking the cover 70 is connected to the upper end 205a. The other end of the wire 207 is connected to the upper portion of the hook 203 that engages with the pin 200 fixed to the cover 70, and the hook 203 is attached to the cover 70 by a spring (elastic member) 210 provided between the base of the hook 203 and the wire 207. The pin 200 is urged to be engaged. By making the length of the wire 207 longer than the distance between the upper end portion 205a of the bracket 205 and the upper portion of the hook 203 so that the wire 207 is loosened, the pin 200 on the cover 70 side and the hook 203 on the collector bag 66 side are engaged. The combined state is maintained and the opening of the cover 70 is restricted. These pins 200, hooks 203, springs 210, etc. function as door portion restricting means for restricting the opening of the cover 70 as the door portion of the collector bag 66.

  When the hydraulic cylinder 172 for dumping is extended, the collector bag 66 can be tilted backward while the cover 70 remains closed. At this time, as shown by the solid line state in FIG. 6, the first link 215a and the second link 215b of the opening / closing link 215, which will be described later, are in a bent (refracted) state, and the cover 70 is not opened (no opening operation is given). . Although not shown in the drawings, the rear bottom surface of the duct 22 is formed of an elastic body, or a member such as an elastic body is provided between the collector bag 66 and the duct 22, so that even if the collector bag 66 tilts backward, Interference between the front end portion of the bag 66 and the rear portion of the duct 22 is reduced.

  The front turf grass of the collector bag 66 can be moved rearward (turf grass movement function), and a vacant space is created in the front of the collector bag 66 to compress the turf grass, and the collector bag accommodates the cut turf grass. 66 spaces can be used effectively, and the mowing and collecting work can be continued.

On the other hand, when the elevating links 160 and 162 are in the raised state, as shown in FIG. 8, the distance between the upper end portion 205a of the bracket 205 and the upper portion of the hook 203 is longer than when the elevating links 160 and 162 are in the lowered state. The wire 207 is pulled with no room for slack.
That is, when the elevating links 160 and 162 are in the lowered state, the upper link 160 side end portion 205a is located at the rear portion of the bracket 205 in a side view, so that the distance between the upper end portion 205a of the bracket 205 and the upper portion of the hook 203 is relatively short. However, when the elevating links 160 and 162 are raised, the bracket 205 rotates as the elevating links 160 and 162 are raised, and the upper link 160 side end portion 205a is located at the front portion of the bracket 205 in a side view. The distance between the upper end 205a and the upper part of the hook 203 is relatively long.

Therefore, when the elevating links 160 and 162 are in the raised state, the wire 207 is pulled, the hook 203 rotates against the urging force of the spring 210 at the base of the hook 203, and is released from the pin 200 to release the restriction of the cover 70. it can.
Thus, when the elevating links 160 and 162 are in the lowered state, one end is connected to the hook 203 and the other end is connected to the upper end portion 205a of the bracket 205 provided on the lower link 162 of the elevating links 160 and 162. Therefore, the hook 203 is kept engaged with the pin 200 fixed to the cover 70 by the spring 210. On the other hand, when the lift links 160 and 162 are in the raised state, the wire 207 is stretched. The pulling operation of the wire 207 occurs against the biasing force of the spring 210, and the restriction of the cover 70 can be released by rotating the hook 203. These elevating links 160 and 162, the bracket 205, the wire 207, etc. function as door part restriction release means for releasing the restriction on the opening of the cover 70.

  In addition, this grass collecting apparatus connects the upper end of the opening / closing link 215 to the rear portion of the fulcrum 70c of the cover 70 for opening and closing the cover 70, and the collector bag 66 is tilted backward by the extension action of the dump cylinder 172. At the same time, the L-shaped cover 70 can be opened around the fulcrum 70c by the stretching action of the opening / closing link 215. The opening / closing link 215 includes a first link 215a connected to the cover 70 side and a second link 215b connected to the dump cylinder 172 side. The first link 215a and the second link 215b are refracted by the slide lock mechanism R. It is configured to switch to a linear state that is possible or impossible to refract. The second link 215b is rotatably connected to the upper ends of the dump cylinder 172 and the vertical link 163 by bolts 224 and nuts 225. As an opening / closing means for the cover 70, an opening / closing mechanism including the first link 215a, the second link 215b, the slide lock mechanism R, the dump cylinder 172, and the like is configured.

FIG. 10 is a detailed view for explaining the connection relationship between the lift links 160 and 162 and the slide lock mechanism R, and FIG. 11 is a configuration diagram of the slide lock mechanism R.
The slide lock mechanism R slides to the pivotal support portion (connecting portion S) of the first link 215a and the second link 215b, and a plate-like slide member 217 that linearly locks both the links 215a and 215b, A spring (elastic member) 220 that urges the slide member 217 to the unlocked position (position where the folding state is possible) and a wire 223 that pulls and operates to the locked position against the spring 220, and one end of the wire 223 is A bracket provided on the lower link 162 of the elevating links 160 and 162 via a locking portion (an outer wire is fixed) 163a of the vertical link 163 at the other end connected to the slide member 217 by a bolt 224 and a nut 225. 205 is connected to an end (lower end in the illustrated example) 205b opposite to the upper link 160 side.

  The bolt (pin) 224 at the connecting portion between the wire 223 and the slide member 217 slides in the elongated hole 215aa in the first link 215a by the pulling action of the wire 223 and the biasing force of the spring 220. The member 217 slides in the direction opposite to the arrow J direction and the arrow J direction.

  When the lifting / lowering links 160 and 162 are lowered (FIG. 7), when the hydraulic cylinder 172 for dumping is shortened, the wire 223 is loosened and the slide member 217 is pulled by the spring 220 and slides in the direction of arrow J. The connecting portion (fulcrum portion) S of the first link 215a and the second link 215b appears and can be bent (broken) with the connecting portion S as a fulcrum. When the dumping hydraulic cylinder 172 is extended from the state shown in FIG. 7, the state shown by the solid line in FIG. When the hydraulic cylinder 172 for dumping extends, the collector bag 66 tilts backward around the rotation fulcrum 168, but the opening of the cover 70 is restricted by the engagement state with the hook 203, that is, the door part restricting means functions. To do. Note that when the hook 203 is detached, the cover 70 flaps with its own weight, so that the hook 203 regulates it.

  Even if the collector bag 66 is tilted backward (solid line state in FIG. 6), the distance between the locking portion 163a of the vertical link 163 and the pin 224 is almost the same, and the slide member 217 is not pulled by the wire 223. Therefore, the wire 223 is pulled by the spring 220 and keeps sliding in the direction of arrow J, and the first link 215a and the second link 215b hold the bendable state.

  On the other hand, when the elevating links 160 and 162 are in the raised state, as shown in FIG. 8, the distance between the locking portion 163a of the vertical link 163 and the lower end portion 205b of the bracket 205 is increased, and the wire 223 is less slackened. The first link 215a and the second link 215b are switched from the refractable state to the non-refractive linear state by the 223 being stretched and the slide member 217 being pulled in the direction opposite to the arrow J direction to lock the fulcrum portion S. . As shown in FIG. 9, when the hydraulic cylinder 172 for dumping is extended, the collector bag 66 tilts backward around the rotation fulcrum 168 and the restriction of the cover 70 is released, so that the cover 70 is opened.

  Even if the collector 16 rises and the first link 215a and the second link 215b are in a straight line state, the cover 70 is not opened (the state of FIG. 8), but the first link 215a and the second link 215b are in a straight line state, and The cover 70 is opened by the extension of the hydraulic cylinder 172 for dumping (state shown in FIG. 9). That is, the upper portion 70a of the cover 70 is stretched by the opening / closing link 215 as the elevating links 160 and 162 are raised, and the hydraulic cylinder 172 for dumping is extended to rotate the collector bag 66 to the right (clockwise). 70 opens. In the state of FIG. 8, the wire 223 is in a stretched state, and when the dumping hydraulic cylinder 172 extends in this state, the collector bag 66 tilts backward and the cover 70 opens.

  When the elevating links 160 and 162 are in the lowered state, the lower link 162 and the vertical link 163 form an acute angle in a side view, and the locking portion between the end 205b opposite to the upper link 160 side of the bracket 205 and the vertical link 163 The distance between the lower link 162 and the vertical link 163 increases as the elevating links 160 and 162 rise, and the lower link 162 in a side view is seen when the elevating links 160 and 162 are raised. Since the vertical link 163 forms an obtuse angle, the distance between the end 205b opposite to the upper link 160 side of the bracket 205 and the engaging portion 163a of the vertical link 163 is relatively long. The wire 223 is connected to a position where the collector 16 is stretched by the rising of the collector 16, and the distance between the end portion 205 b of the bracket 205 and the locking portion 163 a of the vertical link 163 varies using the rising stroke of the collector 16. What is necessary is just to link the wire 223 to the location.

  As described above, when the elevating links 160 and 162 are in the raised state, the wire 207 for locking the cover 70 is pulled to rotate the hook 203 against the urging force of the spring 210 at the base of the hook 203, and the pin 200. And the restriction of the cover 70 can be released (the door part restriction releasing means functions). Then, the slide member 217 is pulled in the direction opposite to the arrow J direction by the wire 223, and the first link 215a and the second link 215b are linearly locked by the slide member 217. When the hydraulic cylinder 172 for dumping is extended and the collector bag 66 is tilted backward, the first link 215a and the second link 215b are linearly locked by the slide member 217 and push up the cover 70, so that the fulcrum 70c is the center. As shown in FIG. 9, the turf grass in the collector bag 66 is discharged from the upper opening 66a and the rear opening 66b (turf grass discharging function).

By adopting this configuration, when the lifting link 160, 162 is in a lowered working posture, even if the dump hydraulic cylinder 172 is extended, the door portion regulating means functions and the opening of the cover 70 is restricted. The collector bag 66 tilts backward around the pivot fulcrum 168 in a state in which is closed. Therefore, by moving the turf grass accommodated without spilling down from the front part of the collector bag 66 and compressing the turf grass, an empty space is created in the front part of the collector bag 66, and the space of the collector bag 66 is effective. The cutting and collecting work can be continued.
And since the frequency | count of the discharge operation | work of turf grass decreases by making the collector bag 66 full, work efficiency improves.

  On the other hand, when the lift link 160, 162 is in the raised discharge posture, the door part restriction release means functions to release the cover 70 opening restriction, so that the dumping hydraulic cylinder 172 is extended to open the cover 70. And since the collector bag 66 inclines backward around the rotation fulcrum 168, the turf grass in the collector bag 66 can be quickly discharged | emitted from the upper surface opening part 66a and the back surface opening part 66b. Since the turf grass discharge is linked to the lifting of the lift links 160 and 162 and the backward tilting operation of the collector bag 66 as described above, the turf grass discharge operation in the collector bag 66 can be easily performed without any special operation. Can do.

  FIG. 12 shows a view in which a cover 75 of a conventional collector bag 66 is added to the collector 16 shown in FIG. Conventionally, as shown in FIG. 12, the cover 75 covering the back opening 66b of the collector bag 66 opens the fulcrum 75a provided at the rear upper part of the collector bag 66 to discharge the turf grass. Since the turning locus position M1 is lower than the back opening 66b, turf grass discharged from the back opening 66b is collected near the turning locus M1 (indicated by a dotted line), and thus may not be discharged well. . However, according to the present embodiment, since the fulcrum 70c of the cover 70 is provided in the upper front portion of the collector bag 66, the rotation locus position M2 (indicated by a dashed line) of the cover 70 is higher than the conventional rotation locus position M1. Thus, the turfgrass discharged from the upper surface opening 66a and the rear surface opening 66b when the turfgrass is discharged does not accumulate in the vicinity of the rotation locus position M2 and become an obstacle, and the turfgrass can be stacked high. Therefore, the efficiency of the turf grass discharge operation is improved.

  As described above, the first link 215a and the second link 215b of the opening / closing link 215 that opens and closes the cover 70 are of a folding type, and the slide member 217 has a position depending on the position (lowering or rising) of the lifting links 160, 162. Since the looseness of the wire 223 to be connected changes, the slide member 217 slides between a bendable state in which the first link 215a and the second link 215b are bent and a non-refractive state in which the first link 215a and the second link 215b are linear. Can be switched between linked and unlinked states.

  In other words, the cover 70 covering the turf grass outlet in the collector bag 66 is opened or tilted rearward depending on the height position of the collector bag 66. When the dumping hydraulic cylinder 172 is extended at the position where the collector 16 is lowered (the working position), the collector bag 66 is tilted backward while the cover 70 is closed. On the other hand, when the dumping hydraulic cylinder 172 is extended at the position where the collector 16 is raised to the maximum (discharge position), the cover 70 is opened and the collector bag 66 is inclined backward. The mounting position of the bracket 205 to the lower link 162 and the lengths of the wires 207 and 223 are set so that the cover 70 is opened when the hydraulic cylinder 172 for dumping is extended at the position where the lifting links 160 and 162 are raised from the intermediate position. You may adjust it.

  In this way, the first link 215a and the second link 215b of the open / close link 215 are detected by the displacement of the lift links 160 and 162 by the displacement of the lift links 160 and 162, and the slide member 217 is connected by the wire 223 connected to the slide member 217. Slides, and the linear state of the first link 215a and the second link 215b is locked or released.

  Then, a storage sensor 250 is provided in the collector bag 66, the duct 22, or the like, and when the turf grass in the collector bag 66 reaches a predetermined amount by the storage sensor 250, a notification such as a buzzer 245 is used for notification. , You can grasp the capacity in detail. The buzzer 245 is not limited to a lamp that can be sensed visually. Then, during the cutting operation, when the storage sensor 250 senses and the buzzer 245 sounds, the collector bag 66 is tilted backward at the lowermost position (working position) of the collector 16 to bring it to the front of the collector bag 66. Since the accumulated turfgrass is moved rearward and the turfgrass is compressed, an empty space is created in front of the collector bag 66, and the space of the collector bag 66 can be used effectively. Then, the mowing and collecting work can be continued, and the working efficiency is greatly improved. .

  Moreover, when the turf grass in the collector bag 66 becomes full, the structure which alert | reports by the buzzer 245 may be sufficient. In other words, the accommodation sensor 250 is a full sensor, and the sensor 250 senses when the turf grass in the collector bag 66 is full and notifies it by a notification means such as a buzzer 245. The accommodation sensor 250 or the full sensor may be provided near the entrance of the collector bag 66 of the duct 22.

FIG. 13 shows a control block diagram of the grass collecting apparatus of one embodiment of the present invention, and FIG. 14 shows an example of the control flow.
When the engine start key switch 253 is turned on (on), the engine 27 is started, and when the PTO valve 267 is operated by operating the PTO clutch lever 260, the PTO clutch 90 is turned on and the HST is operated forward. The lawn mower moves forward and the blade 54 in the mower deck 13 rotates to start the lawn mowing work. FIG. 14 shows an example in which an accommodation sensor 250 for sensing the amount of turfgrass in the collector bag 66 is provided. When the accommodation sensor 250 is provided at the front of the collector bag 66, When the front turf reaches a predetermined amount and the accommodation sensor 250 is turned on, a sensor signal is input to the controller 100 and the buzzer 245 sounds.

  Therefore, when the operator operates the HST to the neutral side to stop the riding lawn mower and further operates the dump lever 257, the buzzer 245 stops sounding. Next, when the operator turns off the PTO clutch lever 260, the PTO valve 267 is actuated by the controller 100, the PTO clutch 90 is turned off, and the rotation of the blade 54 in the mower deck 13 is stopped. When the lawn mowing operation is stopped, the dump valve 263 is activated, the dump hydraulic cylinder 172 is extended, and the collector bag 66 is tilted backward. By tilting the collector bag 66 backward, the turf grass deposited on the front part of the collector bag 66 moves rearward, so that the turf grass is compressed and an empty space is created in the front part of the collector bag 66. The extension time of the hydraulic cylinder 172 (the backward tilt time of the collector bag 66) is measured by a timer, and when a predetermined time elapses (timer up), the hydraulic cylinder 172 for dumping is switched to the shortened side, and the collector bag 66 rises at the rear. Return to the original posture in the state.

  The turf grass collecting operation is continued and the buzzer 245 sounds when the front turf grass in the collector bag 66 reaches a predetermined amount and the accommodation sensor 250 is turned on, and the operator operates the HST to the neutral side. Then, the riding lawn mower is stopped, and the PTO clutch 90 is disengaged by operating the PTO clutch lever 260. When the operator operates the elevating lever 255, the elevating valve 265 is opened by the controller 100, the elevating hydraulic cylinder 169 is expanded, the elevating links 160 and 162 are raised, and the collector 16 is raised. When the operator operates the dump lever 257, the dump valve 263 is actuated, the dump hydraulic cylinder 172 is extended, and the collector bag 66 is tilted backward. Since the restriction of the cover 70 is released at this time, the cover 70 is opened by the extension of the dump hydraulic cylinder 172, and the turf grass in the collector bag 66 is discharged from the upper surface opening 66a and the rear surface opening 66b.

  When the turf is discharged from the collector bag 66 and the operator operates the dump lever 257, the dump valve 263 is activated, the dump hydraulic cylinder 172 is shortened, and the lift lever 255 is further operated to operate the lift valve 265. Is closed, the lifting hydraulic cylinder 169 is shortened, the lifting links 160 and 162 are lowered, and the collector 16 returns to the lowest position (working position). When the machine start key switch 253 is turned on, the flow is returned, and when the key switch 253 is turned off (off), the flow ends.

FIG. 15 shows a view (partially sectional view) when a cover is provided on the hydraulic cylinder 169 for raising and lowering the collector 16 shown in FIG.
In order to prevent interference between the hydraulic cylinder 169 for raising and lowering the collector 16 and a truck bed, a cover 180 may be provided on the hydraulic cylinder 169, and the main body of the hydraulic cylinder 169 may be used as a guide for sliding the cover 180.

  As shown in FIG. 15, a cylindrical (cylindrical or the like) cover 180 is fixed around the upper end (outer diameter) of the piston 169a of the hydraulic cylinder 169 for raising and lowering. When the piston 169a expands and contracts in the vertical direction, the cover Reference numeral 180 is also configured to move up and down. Since the diameters of the piston 169a and the cylinder main body 169b are different, the insertion portion of the piston 169a into the cylinder main body 169b forms a stepped portion, and turfgrass and dust are likely to accumulate, but the length of the cover 180 is increased by the piston 169a. By making it longer than the length of the piston 169a when extended to the maximum, it is possible to reliably cover the stepped portion, and it is possible to prevent turfgrass, dust and the like from biting into the gap between the piston 169a and the cylinder main body 169b.

  According to this configuration, by providing the hydraulic cylinder 169 with the cover 180, it is possible to prevent turfgrass, dust, and the like from biting into the hydraulic cylinder 169. Further, by using the hydraulic cylinder body 169b as a guide for sliding the cover 180, the cover 180 can be configured with a simple configuration.

FIG. 16 shows a side view of the riding lawn mower when the composition around the fuel tank of the riding lawn mower shown in FIG. 1 is changed. FIG. 17 is a rear view of the lower part of the step sheet 43 in FIG.
In the riding lawn mower shown in FIG. 1, the duct 22 connected to the collector bag 66 is located on the right side of the riding lawn mower, but the duct 22 should be positioned at the center in the left-right direction of the riding lawn mower. , The balance of the aircraft is improved. When the duct 22 is arranged at the center of the riding lawn mower, as shown in FIG. 22, the cooling fan 37 is formed with a recess 22c so as not to interfere with the duct 22, and the cross section of the fuel tank 42 is stepped. The shape avoids the suspension 46 and the duct 22 of the seat 43. That is, the recesses 42a and 42b are provided in the upper and lower portions of the fuel tank 42 so as not to interfere with the suspension 46 and the duct 22 so that the vertical cross section is H-shaped.

  Thus, by making the shape of the members around the duct 22 not to interfere with each other, the duct 22 can be easily positioned at the center in the left-right direction of the riding lawn mower, and the balance of the airframe is improved. At the same time, downsizing of the aircraft is achieved.

  The riding lawn mower provided with the grass collecting device of the present invention is highly useful as a domestic lawn mower for industrial use.

DESCRIPTION OF SYMBOLS 1 Car body 2 Step floor 3 Engine output shaft 4 Rear axle housing 5 Rear case 6 Main transmission shaft (1st transmission shaft 6a, 2nd transmission shaft 6b)
7 Rear output shaft 8 HST case 9 HST input shaft 10 Belt 11 PTO shaft (3rd transmission shaft 11a, 4th transmission shaft 11b)
12 belt 13 mower deck 14 blade shaft 15 mower input shaft 16 collector 20 mower deck discharge port 22 duct 23 front wheel 24 front axle 25 center pivot 26 rear wheel 27 engine 28 flywheel 29 radiator 30 radiator fan 31 bonnet 32 oil tank 33 steering post 34 handle 35 differential case 36, 50, 52, 53 pulley 37 cooling fan 38 trunnion shaft mechanism 39 rear axle 40 rear bracket 42 fuel tank 43 step seat 44 seat floor 45 fender 46 suspension 47 connection bracket 48 bevel gear (rear case input shaft)
49, 51 Metal 54 Blade 55, 56 Gauge wheel 57 Front link 58 Rear link 59, 60 Blade case 62 Blade transmission shaft 63 Mounting frame 66 Collector bag 67 Opening portion 68 Bag frame 69 Handle lever 70, 75 Cover 71 First joint member 72 Second joint member 73 Third joint member 77 Discharge cylinder 80 Rod 81 Reinforcement frame 83 Bracket 90 PTO clutch 100 Controller 101 Support frame 116 Link mechanism 117 Tow rod 146 Mast 158, 159 Upper pivot fulcrum 160, 162 Lift link 163 Vertical Links 164, 165 Lower pivot fulcrum 168 Support 169 Lifting hydraulic cylinder 170 Frame 172 Dumping hydraulic cylinder 180 Hydraulic cylinder cover 200 Pin 203 Hook 205 Bracket G 207 Wires 210, 220 Spring 215 Opening / closing link 217 Slide member 223 Wire 224 Bolt (pin) 225 Nut 245 Buzzer 250 Storage sensor (full sensor)
253 Key switch 255 Hydraulic lift lever 257 Dump lever 260 PTO clutch lever 263 Dump valve 265 Lift valve 267 PTO valve

Claims (4)

A mower (13) provided on the traveling vehicle body (1);
A storage container (66) provided at the rear of the moor (13) and provided with an open part (67) in the front part for storing turf grass cut by the moor (13);
A working posture for storing turf grass in the housing container (66) and posture switching means (69 or 172) for switching from the working posture to a discharge posture for discharging turf grass,
The posture switching means (69, 172, etc.) has a turfgrass moving function for moving turfgrass accommodated by tilting the container (66) backward and downward from the working posture to move backward from the vicinity of the opening (67). Turfgrass collecting device featuring. Provided between the container (66) and the traveling vehicle body (1), and when the discharging posture, the container (66) is raised with respect to the traveling vehicle body (1) from a predetermined position in the working posture; Vertical movement means (146, 160, 162, 169, etc.) for lowering the container (66) from the raised position and returning it to the predetermined position during the working posture;
Discharge ports (66a, 66b) provided at the rear of the storage container (66) for discharging turf grass in the storage container (66);
A door part (70) of a container (66) provided outside the discharge ports (66a, 66b) and provided with opening and closing means (172, 215, etc.);
Door part restricting means (200, 203) for restricting the opening of the door part (70) by the opening / closing means (172, 215, etc.) when the container (66) is inclined backward and downward by the turfgrass moving function at a predetermined position in the working posture. 210, etc.)
Door part restriction releasing means for releasing the opening restriction of the door part restricting means (200, 203, 210, etc.) in conjunction with the rising of the container (66) by the vertical movement means (146, 160, 162, 169, etc.). (160, 162, 205, 207, etc.)
The posture switching means (172, etc.) is arranged such that the door part (70) whose opening restriction is released by the door part restriction releasing means (160, 162, 205, 207, etc.) of the storage container (66) by the turfgrass moving function. It has a turfgrass discharge function for discharging turfgrass in the storage container (66) from the discharge ports (66a, 66b) by being opened by the opening / closing means (172, 215, etc.) in conjunction with a backward downward tilting operation. A grass collecting apparatus for turfgrass according to claim 1. The posture switching means (172, etc.) includes an expansion / contraction cylinder (172) provided between the inner surface of the door portion (70) and the wall surface of the storage container (66), and the turfgrass movement function is provided by the expansion / contraction cylinder (172). A function that is demonstrated by stretching,
The opening / closing means (172, 215, etc.) of the door part (70) has a first link (215a) having one end connected to the inner surface of the door part (70) and a door part of the telescopic cylinder (172) at one end. (70) the second link (215b) connected to the side end, the connecting portion (S) connected to the other end of the first link (215a) and the other end of the second link (215b), and the first On the link (215a) and the second link (215b), the first link (215a) and the first link (215a) and the first link (215a) and the first link (215a) and the second link (215b) are allowed to be bent at the connecting portion (S). Opening / closing provided with a connecting portion (S) to the two links (215b), the first link (215a) and a slide member (217) slidable to a position where the second link (215b) is linear. Mechanism (172, 215a, 21 b, 223, etc.) have,
The opening / closing mechanism (172, 215a, 215b, etc.) slides the slide member (217) in conjunction with the rising of the container (66) by the vertical movement means (146, 160, 162, 169, etc.). The telescopic cylinder (172) is switched from a position allowing the middle broken state of the first link (215a) and the second link (215b) to a position where the first link (215a) and the second link (215b) are linear. The grass collecting apparatus for turfgrass according to claim 2, wherein the door portion (70) is opened in conjunction with a backward downward tilting operation of the storage container (66) due to stretching of the container.   The posture switching means (69) has a gripping portion (69a) at its upper end, and the lower portion of the gripping portion (69a) is connected to the storage container (66), so that the storage container (66) is stored in the storage container. The turfgrass collecting apparatus according to claim 1, characterized in that the lever (69) is tilted in the front-rear direction by two fulcrums of the front upper end (K1) and the rear upper end (K2) of (66).

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