JP2006246880A - Riding-type mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact riding-type mower enabling cut grass to be efficiently removed from the cut grass discharge cylinder 11 of a mowing device 10. <P>SOLUTION: The riding-type mower is such that the bottom plate 16 of the cut grass discharge cylinder 11 is vertically swingably supported, and an operative rod 18a made to be associated with the bottom plate 16 so as to make a swing operation of the bottom plate 16 is extended from the mowing device 10 to the rear portion of a self-propelled vehicle body, wherein the operative rod 18a is arranged so as to pass through the space within the vertical width of the duct 30 when viewed from a side of the vehicle body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention includes a mowing device provided between the front and rear wheels of a self-propelled vehicle body, a grass collection container supported at the rear of the self-propelled vehicle body so as to be switchable between a grass collecting state and a grass discharging state, and a cut grass discharge tube of the mowing device. The present invention relates to a riding-type grass mower provided with a duct that is disposed between the left and right rear wheels of the self-propelled vehicle body so as to supply the cut grass to the collecting container.

In the first aspect of the invention, the mowing device provided between the front and rear wheels of the self-propelled vehicle body, the grass collection container supported at the rear part of the self-propelled vehicle body so as to be switchable between the grass collecting state and the grass discharging state, In the riding-type grass mower having a duct disposed between the left and right rear wheels of the self-propelled vehicle body so as to supply the grass cut from the cut grass discharge tube to the grass collection container,
The bottom plate of the cut grass discharge cylinder is supported so as to swing up and down,
An operating rod linked to the bottom plate so as to swing the bottom plate extends from the mowing device to the rear portion of the self-propelled vehicle body in a state of passing through the vertical width of the duct in a side view of the vehicle body.

  According to the second aspect of the invention, in the configuration of the first aspect of the invention, the grass container is provided with a wall body that is open on the rear end side of the duct, and a container body that is openable and closable with respect to the wall body. It is configured.

  According to the third aspect of the invention, in the configuration of the first or second aspect of the invention, the operation rod is arranged along the duct.

  In the fourth invention, in any one of the first to third inventions, the duct is detachably supported.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, a pair of left and right steering operations and driveable front wheels 1 and a pair of left and right driveable rear wheels 2 are provided. Front and rear of a body frame 5 of a self-propelled vehicle body provided with a driving part having an engine 3 provided to transmit power and a driving part having a driving seat 4 positioned between the left and right rear wheels 2 A mowing device 10 is connected between the wheels via a link mechanism 6, and the power is transmitted from the engine 3 to the mowing device 10, so that the grass is collected near the rear of the rear wheel 2 at the rear of the self-propelled vehicle body. The container 20 is provided, and the cut grass discharge cylinder 11 of the mowing apparatus 10 is disposed in the grass collection container 20 via a duct 30 disposed so as to pass between the left and right rear wheels 1 and 2 in the front-rear direction of the self-propelled vehicle body. Communicating to configure a riding mower

  This mowing machine is used to cut grass and grass, and when the hydraulic lifting cylinder (not shown) linked to the link mechanism 6 is telescopically operated, the lifting cylinder moves the link mechanism 6 to the vehicle body frame 5. On the other hand, by swinging up and down operation, the mowing apparatus 10 is moved up and down into a lowering work state in which the ground gauge wheel 12 is grounded and to a non-working state in which the ground gauge wheel 12 is lifted from the ground. When the self-propelled vehicle body travels with the mowing device 10 in the descending work state, the mowing device 10 is a blade-shaped cutting blade 14 that can be driven and rotated and is located in the mowing blade housing 13 in a lateral direction of the self-propelled vehicle body. The turf and grass are cut by, and the cut grass and cut grass (hereinafter simply referred to as cut grass) are discharged from the cut grass discharge cylinder 11 of the cutting blade housing 13 by the conveying air generated by the rotation of the cutting blade 14. Then, it is conveyed to the rear of the vehicle body through the space between the left and right rear wheels 2 and 2 by the duct 30 and supplied to the grass collection container 20. The grass collection container 20 collects and stores the cut grass from the duct 30.

  As shown in FIG. 4, the grass collection container 20 is rectangular when viewed from the front and back of the vehicle body supported by the rear portion of the vehicle body frame 5 via a support frame 5 a extending rearward from the vehicle body frame 5, and when viewed from the side of the vehicle body. A vertical plate-like wall body 21 extending in the vertical direction of the vehicle body and a container body 22 positioned on the rear side of the wall body 21 are provided.

  The container body 22 is configured in a box shape by a container frame 23 made of a round pipe material, and a pair of left and right lateral wall plates 24 connected to the container frame 23, a bottom plate, a top plate, and a rear wall plate. An opening 25 formed by the container frame 23 is provided on the front end side of the container body 22.

  A pair of left and right mounting brackets 26 provided inside the container main body 22 are extended from the wall body 21 toward the rear of the vehicle body, and a pair of left and right support arms 27 arranged so as to enter the container main body 22. The container main body 22 is connected to the extending end portion so as to be detachable and rotatable separately, and the container body 22 has a wall around the axis X of the traveling vehicle body which is located at the tip end portion of the support arm 27 as shown in FIG. It is supported by the wall 21 so as to swing up and down with respect to the body 21 and to be detachable between the mounting bracket 26 and the support arm 27 as shown in FIG.

  As shown in FIGS. 4 and 5, the rear end portion of the duct 30 is located in the duct hole A of the wall body 21, and the opening on the rear end side of the duct 30 is the cut grass insertion port of the grass collection container 20. 32.

  That is, when the mowing operation is performed, the container body 22 is fixed to the axis X by the handle 45 fixed to the top plate of the container body 22 of the grass collection container 20 or the handle 46 protruding upward from the top plate of the container body 22. The container body 22 is swung downwards so that the opening 25 of the container body 22 faces the front of the vehicle body and is closed by the wall body 21 to bring the grass collection container 20 into the grass collection closed state. When the grass collection container 20 is in the grass collection closed state, a closing hook 28 (see FIG. 4) provided on the left and right ends of the lower end side of the wall body 21 so as to be swingable up and down is engaged with the container frame 23. Then, the grass collection container 20 is locked in the grass collection closed state, and the work is carried out in this state. Then, the duct 30 inherits the cut grass from the cut grass discharge tube 11 of the mowing device 10 on the front end side of the duct 30 and transports it in the rear direction of the vehicle body by the transport wind from the mowing device 10, and on the rear end side of the duct 30. The grass collection container 20 is fed into the grass collection container 20 through the cut grass inlet 32, and the grass collection container 20 cuts the conveying air that has entered along with the grass cut from the duct 30 while discharging it out of the grass collection container through the air discharge holes provided in the horizontal wall plate 24. The grass is collected and stored in the grass collection container by the wall body 21 and the container body 22.

  When the grass collecting container 20 is full, the operating rod 29 (see FIG. 4) connected to one of the pair of left and right closing hooks 28 is raised, and the closing hook 28 connected to the operating rod 29 is connected. Is switched to the unlocked state released from the container frame 23, and the other closing hook 28 is also operated to the unlocked state by the interlocking action of one rotating support shaft 28a connecting the pair of left and right closing hooks 28. Then, the closing lock of the grass collecting container 20 by the closing hook 28 is released, and the handle 45 or 46 is operated to swing the container body 22 upward about the axis X to open the opening 25 of the container body 22. A lifted open state is provided in which the wall 21 is separated from the rear side and opened downward in the vehicle body. Then, the grass collection container 20 becomes a discharge opening state, and the cut grass stored in the grass collection container can be dropped from the opening 25 of the container body 22 and discharged.

  As shown in FIGS. 5, 7, etc., a sheet metal lid 40 for a portion A <b> 1 located below the duct 30 in the duct hole A of the wall body 21 in the vertical direction of the grass collection container, The side wall of the wall 21 on the rear side of the vehicle body is configured such that the lid body 40 can be swingably opened and closed around the axis Y in the vertical direction of the grass collection container positioned on one end side in the lateral direction of the grass collection container. That is, the side surface on the inner side of the grass collection container is provided on the side, and the storage amount detection device 50 including the swing sensor 52 and the detection switch 51 is provided on the lid body 21.

  When the cut grass stored in the grass collection container 20 reaches a set amount such as a full amount, the storage amount detection device 50 detects this and detects so as to activate a notification device (not shown) located in the operation unit. The result is output by the detection switch 51, and the details are configured as follows.

  As shown in FIGS. 6 and 7, in the storage amount detection device 50, the attachment base 52 a rotates on the support plate portion 42 of the detection device attachment body 41 supported on the back side of the lid body 40 via the support shaft 53. The swing sensor 52 that is freely connected, the detection switch 51 that is supported by the support plate portion 42, and a coil-type that is connected to a spring support arm 52d extending from the mounting base 52a of the swing sensor 52. A spring 61 is provided.

  The swing sensor 52 extends from the mounting base 52a through the sensor hole 43 of the lid body 40 to the inside of the grass collection container 20 and is located near the lower portion of the cut grass insertion port 32 and is positioned first. A pressure sensing part 52 c having a first pressure sensing surface 54 and a second pressure sensing surface 55 is provided. The swing sensor 52 is a resin sensor in which a mounting base portion 52a, a switch operation portion 52b, a pressure-sensitive portion 52c, and a spring support arm 52d are manufactured as a single part using a resin material. The pressure-sensitive portion 52c of the swing sensor 52 includes the first pressure-sensitive surface 54 and the second pressure-sensitive surface 55 in a state of being orthogonal or substantially orthogonal to each other when viewed in the direction along the axis Z of the support shaft 53. In addition, the rod-shaped body 54a having the first pressure-sensitive surface 54 and the rod-shaped body 55a having the second pressure-sensitive surface 55 are manufactured so as to be in a bent state where they are connected in an intersecting state.

  That is, the swing sensor 52 is supported so that the pressure-sensitive portion 52c swings up and down around the axial center Z of the support shaft 53 in the lateral direction of the grass collection container. In a state where the cut grass inside does not pressurize the pressure sensing portion 52 c of the swing sensor 52, the swing sensor 52 balances the weight of the spring 61 with the weight of the swing sensor 52. The spring support arm 52d is configured to be in the non-detected posture in which the spring support arm 52d is in contact with the stopper 56. In a state in which the swing sensor 52 is in the non-rising posture, the first pressure-sensitive surface 55 of the swing sensor 52 is an upward surface in the grass container vertical direction, and the second pressure-sensitive surface 55 of the swing sensor 52 is the sensor. When viewed in the direction along the swing axis Z, it becomes a lateral surface facing toward the rear of the vehicle body, and the switch operation portion 52b of the swing sensor 52 is moved away from the operation portion 51a of the detection switch 51 to turn off the detection switch 51. . When the cut grass in the grass collection container 20 pressurizes the pressure-sensitive portion 52c of the swing sensor 52, the pressure-sensitive portion 52c of the swing sensor 52 swings downward around the axis Z due to the pressurizing action. At the same time, when the switch operating portion 52b swings forward around the axis Z and the pressure applied by the cut grass becomes a set force, the switch operating portion 52b touches the operating portion 51a of the detection switch 51. It comes in contact with the descending detection posture. The swing sensor 52 in the lowered detection posture is configured to turn on the detection switch 51 by the switch operation unit 52b.

  As shown in FIG. 6, the spring 61 connected to the swing sensor 52 and the spring support rod connected to the end of the spring 61 opposite to the side connected to the swing sensor 52 are connected. Sensitivity adjusting means 60 for the swing sensor 52 is configured by providing a dual-purpose sensitivity adjusting body 62 and the like.

  As shown in FIGS. 6 and 7, the base end side of the sensitivity adjusting body 62 is rotatably supported by a support shaft 64 made of a bolt attached to a bracket 63 fixed to the detection device mounting body 41 to adjust the sensitivity. The distal end side of the body 62 is supported by an adjustment guide body 65 fixed to the detection device mounting body 41, and the operation portion 66 that is also used as a spring hook provided at the intermediate portion of the sensitivity adjustment body 62 is operated up and down. As a result, the sensitivity adjusting body 62 is swung up and down along the guide groove 67 of the adjustment guide body 65 in the vertical direction of the collecting container as shown in FIG. Yes. When the sensitivity adjusting body 62 is moved upward to the upper end side of the guide groove 67 and is held in the positioning recess 68a of the adjustment guide body 65 communicating with the guide groove 67, the sensitivity adjusting body 62 is moved to the sensitive position B. The spring 61 is operated in a relaxed state so that the spring 61 is in a free state in a state where the spring 61 is operated and held and the swing sensor 52 is in the non-detection posture. When the sensitivity adjusting body 62 is lowered to the lower end side of the guide groove 67 and enters the positioning recess 68b of the adjustment guide body 65 communicated with the guide groove 67, the sensitivity adjusting body 62 is moved to the insensitive position C. The spring 61 is pulled and operated so that the spring 61 is elastically deformed as the swing sensor 52 is lowered from the raised non-detecting posture.

  Thus, when the sensitivity adjuster 62 is operated to the sensitive position B, the sensitivity adjuster 60 causes the spring 61 to be hardly elastically deformed even if the swing sensor 52 is lowered and swinged, and the swing sensor 52 is lowered. There is almost no resistance to the swing by the spring 61, and the pressurizing action of the cut grass by the swing sensor 52 so that the swing sensor 52 swings in response to the relatively weak pressurizing action by the cut grass. Adjust the sensitivity to. On the other hand, when the sensitivity adjuster 62 is operated to the insensitive position C, the sensitivity adjuster 60 causes the spring 61 to be elastically deformed as the swing sensor 52 swings downward, and the swing sensor 52 moves downward. Sensitivity to the pressurizing action of the cut grass by the swing sensor 52 so that the motion is given resistance by the spring 61 and the swing sensor 52 does not swing in response to the relatively weak pressurizing action by the cut grass. Adjust to insensitive state.

  As shown in FIG. 7 and the like, a connection screw 71 that fastens and fixes the detection device support 41 to the lid 40, and a bolt hole 72 provided in the detection device support 41 so that the connection screw 71 is mounted. The set height adjusting means 70 for the swing sensor 52 is configured.

  That is, the bolt hole 72 is a long hole along the vertical direction of the grass collection container 20, and the detection device mounting body 41 extends along the bolt hole 72 or the long screw hole 40 a of the lid body 40. Accordingly, when the lid 40 is moved up and down, the swing sensor 52 moves up and down with respect to the lid 40 along the long hole-shaped sensor hole 43 of the lid 40, and the detection switch 51 and the sensitivity. The adjusting means 60 also moves up and down with respect to the lid 40 together with the swing sensor 52, so that the set height adjusting means 70 changes the position of the swing sensor 52 in the vertical direction of the grass collection container 20 with respect to the grass collection container 20. In addition, the position of the detection switch 51 and the sensitivity adjustment means 60 is changed together with the swing sensor 52.

Thereby, the storage amount detection apparatus 50 operates as follows.
That is, when the cut grass is light, for example, dry, the cut grass sent to the grass collection container 20 as shown in FIG. It tends to be deposited and stored with a substantially uniform deposition height throughout. In this case, the cut grass stored above the swing sensor 52 acts on the first pressure-sensitive surface 54 of the swing sensor 52. That is, the swing sensor 52 is subjected to the pressure action of the cut grass from above the swing sensor 52 in the vertical direction of the grass collection container. As a result, even if the weight of the cut grass that is applied above the swing sensor 52 is relatively small and the weight of the cut grass that pressurizes the swing sensor 52 is relatively small, the weight of the cut grass is low. The swing sensor 52 is efficiently lowered and swung by the cut grass. Therefore, as the cut grass is stored in the grass collecting container 20, the cut grass storage amount does not greatly differ from the set amount determined by the arrangement height of the swing sensor 52, and the cut grass is input to the cut grass input port. The swing sensor 52 descends and swings to the lowering detection posture before being deposited in the vicinity of 32, and the detection switch 51 is turned on. The detection switch 51 detects the swing of the swing sensor 52 to the lowering detection posture, As a result, it is detected that the cut grass storage amount has reached the set amount, and the detection result is output as an electrical signal.

  In contrast, when the cut grass is heavy, such as wet, the cut grass sent to the grass collection container 20 falls as shown in FIG. It tends to be stored in a state in which the deposition height at the location far from the cut grass insertion port 32 is higher than the location close to. In this case, even if the cut grass does not accumulate much above the swing sensor 52, the cut grass collected laterally when viewed from the sensor swing axis direction of the swing sensor 52 is the second of the swing sensor 52. A pressure is applied to the pressure-sensitive surface 55. That is, the swing sensor 52 is subjected to pressure action of the cut grass from the side of the sensor. Thereby, as the cut grass is stored in the grass collection container 20, the cut grass is not greatly different from the set amount determined by the arrangement height of the swing sensor 52, and the cut grass is input to the cut grass input. The swing sensor 52 descends and swings to the lowering detection posture before being deposited in the vicinity of 32, and the detection switch 51 is turned on. The detection switch 51 detects the swing of the swing sensor 52 to the lowering detection posture, As a result, it is detected that the cut grass storage amount has reached the set amount, and the detection result is output as an electrical signal.

  Furthermore, in the case of light cut grass, and even heavy cut grass, the cut grass accumulates in a state where it is long and the density is thin, and the pressurizing action on the oscillation sensor 52 is weak for the amount of accumulation. In the case of cut grass, the swing sensor 52 is adjusted downward with respect to the grass collection container 20 by the installation height adjusting means 70, and in the case of heavy cut grass, the swing sensor 52 is collected by the installation height adjusting means 70. By adjusting the grass container 20 to the ascending side, the accumulated height of the cut grass when the detection switch 51 performs the detection operation is the same or almost the same in both cases of light cut grass and heavy cut grass. Can be adjusted to. Even if there is no change in the weight of the cut grass, the installation height adjusting means 70 moves the swing sensor 52 up and down with respect to the grass collection container 20 to thereby cut the cut grass when the detection switch 51 performs the detection operation. The accumulated height of the cut grass can be adjusted to be lower than before the adjusting operation, or the height of the cut grass when the detection switch 51 is activated can be adjusted to be higher than that before the adjusting operation. It is like that.

  Further, for example, in the case of light cut grass, or even heavy cut grass, the cut grass accumulates in a state where the cut grass is long and the density is thin, and the pressurizing action on the swing sensor 52 for the amount of accumulation. In the case of cut grass that weakens, compared to heavy cut grass, even if the amount of cut grass is large, the pressurizing action of the cut grass on the swing sensor 52 is reduced, and the swing sensor 52 swings downward. In the case of heavy cut grass, compared with light cut grass, even if the amount of cut grass is small, the pressurizing action of the cut grass 52 on the swing sensor 52 increases and the swing sensor 52 is lowered. It becomes easy to swing. For this reason, in the case of light cut grass, the sensitivity adjustment means 60 adjusts the sensitivity of the swing sensor 52 to the pressure action of the cut grass so that the stored amount of cut grass becomes a set amount or a substantially set amount. In this case, the swing sensor 52 can be adjusted so that the detection switch is detected and operated by being sufficiently lowered and swung by the pressure applied by the cut grass. Further, in the case of heavy cut grass, the sensitivity adjustment means 60 adjusts the sensitivity of the swing sensor 52 to the pressure action of the cut grass and the stored amount of cut grass is not the set amount or almost the set amount. Even if the swing sensor 52 is subjected to the pressurizing action of the cut grass, it can be adjusted so that the detection switch 51 is not detected and operated without being lowered sufficiently.

As shown in FIGS. 4 and 10, the grip 46 a of the handle 46 is detachably connected to a cylindrical body 46 b of the handle 46 fixed in the grass collection container main body 22 by a screw portion 46 c. A cleaning rod 47 that can be inserted into and removed from the cylindrical body 46b is connected to the grip portion 46a.
That is, when working, the cleaning rod 47 can be accommodated in the cylinder 46b of the handle 46 so as not to lose or forget to bring it, and when the cut grass adhering to the inside of the grass collection container 20 is cleaned. The cleaning rod 47 can be taken out from the cylinder 46b of the handle 46a and used.

  FIG. 11 shows a mowing apparatus 10 of a mower with another embodiment. In the mowing apparatus 10, the mowing grass is guided to the duct 30 by the mowing grass discharge cylinder 11 of the mowing blade housing 13. The positioned guide bottom plate 16 is supported on the cutting blade housing 13 so as to be swingable up and down via a rotary support shaft 17 positioned on the rear end side of the guide bottom plate 16, and integrated with one end side of the rotary support shaft 17. The guide bottom plate 16 is oscillated and biased to a lowered guide position by a return spring 19 connected to an operation arm 18 that is rotatably connected.

  That is, when cut grass is clogged or attached to the cut grass discharge cylinder 11 of the cutting blade housing 13, the container body 22 of the grass collection container 20 is removed and the duct 30 is removed, and the operation arm 18 extends backward from the vehicle body. By operating the ejected operating rod 18a to move in the longitudinal direction of the vehicle body and swinging the guide bottom plate 16 up and down around the axis of the rotation support shaft 17, the guide bottom plate 16 is used as a cleaning means, and is clogged or adhered. The cut grass is discharged from the cut grass discharge cylinder 11 to the rear side of the vehicle body for cleaning.

Side view of the entire riding mower Top view of the entire riding mower (I) is a side view of a grass collecting container in a cut grass discharge state, (B) is a side view of a container body removed from the rear part of a self-propelled vehicle body Vertical side view of the collection container Rear view of wall of grass container Side view of storage volume detection device Perspective view of storage amount detection device Front view of adjustment guide body (A) is an explanatory diagram showing the accumulation state of light cut grass, (b) is an explanatory diagram showing the accumulation state of heavy cut grass Sectional drawing which shows the storing state of a cleaning stick The side view of the cut grass discharge cylinder arrangement | positioning part of the mowing apparatus provided with another embodiment

Explanation of symbols

2 Rear wheel 10 Mowing device 11 Mowing grass discharge cylinder 16 Bottom plate 18a Operation rod 20 Grass collecting container 21 Wall body 22 Container body 30 Duct

Claims (4)

A mowing device provided between the front and rear wheels of the self-propelled vehicle body, a grass collecting container supported at the rear part of the self-propelled vehicle body so as to be switched between a grass collecting state and a grass discharging state, and a mowing grass from the cut grass discharge tube of the mowing device. A riding-type grass mower equipped with a duct arranged between the left and right rear wheels of the self-propelled vehicle body to be supplied to the grass collection container,
The bottom plate of the cut grass discharge cylinder is supported so as to swing up and down,
A riding-type grass mowing that extends from the mowing device to the rear part of the self-propelled vehicle body with an operation rod linked to the bottom plate so as to swing the bottom plate passing through the vertical width of the duct as viewed from the side of the vehicle body. Machine.   The riding grass mower according to claim 1, wherein the grass collecting container includes a wall body having an opening at the rear end side of the duct and a container body that can be opened and closed with respect to the wall body.   The riding type mower according to claim 1 or 2, wherein the operation rod is arranged along the duct.   The riding type mower according to any one of claims 1 to 3, wherein the duct is detachably supported.

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