JP2012231696A - Riding type mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high dumping type riding mower that facilitates lifting and opening/closing operations of a grass collecting container and quickly performs lifting and opening/closing motions.SOLUTION: The grass collecting container 9 is vertically lifted by a lifting arm 12, and an opening/closing cover 14 is constituted to be openable/closable. The lifting arm 12 is lifted by a lifting cylinder 13, and the opening/closing cover 14 is opened/closed by an opening/closing cylinder 15. An operating lever 33 is provided for operating the lifting cylinder 13 and the opening/closing cylinder 15, and the operating lever 33 is constituted to move along an operation guide. The operation guide includes a first operation guide 30 for operating the lifting cylinder 13; a second operation guide 31 for the opening/closing operation of the opening/closing cylinder 15; and a third operation guide 33 for operating the lifting cylinder and the opening/closing cylinder jointly.

Description

  The present invention relates to a riding type mower having a so-called high dump type grass collection container.

  Patent Document 1 describes a so-called high-dump riding mower that raises a grass collecting container and then opens the lid of the grass collecting container to discharge the grass in the grass collecting container.

JP 2006-94773 A

The cylinder for raising and lowering the grass collection container and the cylinder for the lid for opening and closing the lid of the grass collection container are separate, and each of them is moved up and down and opened and closed by different operating levers.
This invention makes it a subject to make it easy to raise / lower and open / close a grass container. It is another object of the present invention to quickly move up and down and open and close.

  The present invention has the following technical means to solve the technical problem. That is, according to the first aspect of the present invention, in the riding type mower having the grass cutting part and the grass collecting container provided at the rear part of the traveling vehicle body, the grass collecting container is moved up and down by the lifting arm and the opening and closing lid is opened and closed. The elevating arm is configured to be raised and lowered by the elevating cylinder, the opening / closing lid is configured to be opened and closed by the opening and closing cylinder, an operating cylinder for operating the elevating cylinder and the opening and closing cylinder is provided, and the operating lever is provided as an operation guide. The operation guide is configured to operate both the first operation guide for operating the lifting cylinder, the second operation guide for opening and closing the opening / closing cylinder, and the lifting cylinder and the opening / closing cylinder. The third type operation guide is provided.

  According to this configuration, it is possible to perform an operation for only raising and lowering the grass collection container, an operation for only opening and closing the opening and closing lid, and an operation for opening and closing the opening and closing lid while raising and lowering the grass collection container. The grass can be discharged from the container. Moreover, the grass discharging operation of the grass collecting container can be performed quickly.

  In the invention according to claim 2, the first operation guide, the second operation guide, and the third operation guide are provided in parallel, respectively, the center position of each operation guide is set to the neutral position, and the neutral position is communicated by the movement guide. The riding lawn mower according to claim 1, wherein a single operation lever is configured to be movable between the operation guides.

According to this configuration, since it can be operated with a single operating lever, it is possible to prevent erroneous operation and facilitate gripping.
According to a third aspect of the present invention, in the riding type mower having the grass cutting part and the grass collecting container provided at the rear part of the traveling vehicle body, the grass collecting container is moved up and down by the lifting arm and the opening and closing lid is opened and closed. The lifting arm is configured to be moved up and down by a lifting cylinder, the opening and closing lid is moved up and down by an opening and closing cylinder, and operating means for operating the lifting cylinder and the opening and closing cylinder are provided. The operating means is a lifting cylinder. The riding type mower is provided with an operation lever for operating the opening / closing cylinder, and an operation switch for operating the opening / closing cylinder is provided at a grip portion of the operation lever.

According to this configuration, because of the configuration of the operation lever and the operation switch, it is possible to prevent an erroneous operation and to perform the raising / lowering operation of the collecting container and the opening / closing operation of the opening / closing lid while holding the operation lever.
According to a fourth aspect of the present invention, there is provided a rising detection means for detecting that the lifting arm has been raised above the set position by the extension operation of the lifting cylinder, and the lift detecting means detects that the lifting arm has been raised above the set position. The riding lawn mower according to claim 3, wherein the opening / closing lid opens after the opening / closing cylinder starts extending.

  It is possible to prevent the opening / closing lid from being damaged due to the opening / closing lid being opened before the grass container rises sufficiently.

  The present invention can facilitate the raising / lowering and opening / closing operations of the grass collection container. Further, the lifting / closing operation can be performed quickly.

The figure which shows the mowing work position and the grass discharge position of the riding lawn mower seen from the side Diagram showing grass discharge from the side Diagram explaining the operating lever The figure explaining the sensor for raising and lowering The figure which shows the shape of the operation lever of another Example, and an operation guide The figure which shows the shape of the operation guide of another Example Side view of riding lawn mower

The riding mower of the present invention will be described with reference to the drawings.
The traveling vehicle body 1 includes a front wheel 2 and a rear wheel 3. A bonnet 5 that houses an engine 4 is formed on the front side of the traveling vehicle body 1, and a steering 6 and a driver seat 7 are provided at the rear of the bonnet 5.

  A mowing device 8 is provided between the front wheel 2 and the rear wheel 3, a grass collecting container 9 for accommodating grass cut by the mowing device 8 is provided at the rear of the traveling vehicle body 1, and a mowing is provided below the driver seat 7. A shooter 10 through which the grass cut by the device 8 passes is provided.

  The grass collection container 9 is configured to be supported by a support frame 11 attached to the rear portion of the traveling vehicle body 1 via an elevating arm 12, and the elevating arm 12 is configured to move up and down by an expansion and contraction operation of the elevating cylinder 13. An opening / closing lid 14 is provided at the rear portion of the grass collection container 9 and is configured to be opened and closed by an expansion / contraction operation of the opening / closing cylinder 15.

The elevating cylinder 13 is connected to a hydraulic pipe 35 connected to the traveling vehicle body 1 side, and is configured to expand and contract by operating a hydraulic valve (not shown), and the open / close cylinder 15 is hydraulically independent from the traveling vehicle body 1 side. A cylinder is configured to be expanded and contracted by an opening / closing cylinder motor (not shown).
Next, an operation tool for operating the raising and lowering and opening and closing of the grass collection container 9 will be described.

  An operation lever 20 for raising and lowering the raising / lowering cylinder 13 is configured to be movable along an operation guide 21 formed on a fender 29 adjacent to the driver's seat 7. In the present embodiment, the center of the elongated hole-like operation guide 21 is formed. Neutral N is set, and both end sides from the center of the operation guide 21 are set as an operating range of ascending J and descending K of the lifting cylinder.

  An opening / closing switch 22 for operating the opening / closing cylinder 15 is provided on the grip 20 a of the operation lever 20. The open / close switch 22 according to the present embodiment is a seesaw type switch, and is electrically connected to an open / close cylinder motor (not shown) to extend and contract the open / close cylinder 15.

  The front ends of the two lifting arms 12 are connected by a connecting body 23, the connecting body 23 is attached to the support frame 11, a limit switch 24 for raising and lowering is provided on the connecting body 23, and the lifting arm 12 is at a higher position than set. It is the structure which detects this. In the present embodiment, the lifting limit switch 24 is turned off when the lifting arm 12 is raised to the raised position above the setting, and the lifting limit switch 24 is turned on when the raised lifting arm 12 is lowered to the setting position. Of course, on / off may be reversed.

An opening / closing limit switch 26 for detecting opening / closing of the opening / closing lid 14 is provided.
Next, the grass discharging operation of the grass collecting container 9 according to the present embodiment and the operation of returning the grass collecting container 9 to the mowing posture after the grass discharging operation is completed will be described.

  When the mowing operation is performed while driving and the grass stored in the grass collection container 9 is discharged, the lifting / lowering cylinder 13 extends when the operator holds the operating lever 20 and operates from the neutral position N to the lifting / lowering cylinder ascending J side. Then, the grass collection container 9 rises while tilting to the discharge posture. When the open / close switch 22 is operated to the open side from the raised position, the open / close cylinder 15 is extended, the open / close lid 14 is opened, and the cut grass in the grass collection container 9 is dropped and discharged.

  When the grass collection container 9 is returned to the mowing position after the cut grass is discharged, the opening / closing switch 22 is first operated to the closed side, the opening / closing lid 14 is closed, and then the operating lever 20 is operated to the lowering K side. Shrinks and the grass collection container 9 returns to the mowing position.

Next, various conditions regarding the raising / lowering and opening / closing operations will be described.
If the opening / closing lid 14 is opened when the grass collection container 9 is in the grass cutting position, the opening / closing lid 14 may come into contact with the ground or the like and be damaged. Further, in order to smoothly discharge the grass in the grass collection container 9, it is desirable to open the open / close lid 14 after the grass collection container 9 is tilted by raising the grass to a certain height. Therefore, in this embodiment, even when the open / close switch 22 is operated to the open side, the open / close switch 22 is opened / closed until the lift limit switch 24 detects that the lift arm 12 has detected the set height or more when the grass collection container 9 is raised. The cylinder 15 is not energized, and the opening / closing lid 14 is not started to open. Alternatively, as another example, the opening operation of the opening / closing switch 22 energizes the opening / closing cylinder 15 and opens the opening / closing lid 14 on the condition that the raising switch 25 detects that the operating lever 20 has been operated in the upward direction. It may be configured so that it can be performed.

  When the grass collecting container 9 returns from the discharging posture to the mowing posture, when the lowering switch 26 for detecting the lowering operation of the operation lever 20 is detected, the opening / closing switch 15 is contracted by energizing the opening / closing switch 22 and the opening / closing lid 14 is moved. Close action.

Next, another embodiment of the operation tool will be described with reference to FIGS. 5, 6, and 7.
A first operation guide 30 for extending / contracting the lifting cylinder 13, a second operation guide 31 for extending / contracting the opening / closing cylinder 14, and a third operation guide 32 for expanding / contracting the lifting cylinder 13 and opening / closing cylinder 15 together. A movement guide 34 is formed in parallel with adjacent positions, the central portion of each operation guide being a neutral position N, and a single operation lever 33 moving to one of the operation guides between the neutral positions N of each operation guide. Is forming. The operation guide and the movement guide are provided in the fender 29 adjacent to the driver seat 7 in the longitudinal direction.

  The riding lawn mower of FIG. 7 has a configuration in which both the lifting cylinder 13 and the opening / closing cylinder 15 are connected to the traveling vehicle body side by a hydraulic hose 35, and a valve (not shown) for the lifting cylinder 13 and the opening / closing cylinder 15 are used. Each of these valves (not shown) is operated to extend and retract the lifting cylinder 13 and the opening / closing cylinder 15. The operation structure of the valve is such that the valve operating bodies 36 and 37 for operating the valve are connected to the engagement plates 38 and 39 that are operated by the operation lever 34 being engaged. , 39 and valve operating bodies 36, 37 are operated to expand and contract the elevating cylinder 13 and the opening / closing cylinder 14.

  The engagement plates 38 and 39 form engagement holes 38 a and 39 a formed so as to sandwich the operation lever 33 and movement holes 38 b and 39 b for the operation lever 33 to move along the movement guide 34.

  The first valve operating body 36 for the lifting cylinder 13 and the second valve operating body 37 for the opening / closing cylinder 15 are respectively the first engagement plate 38 for the lifting cylinder 13 and the second engagement for the opening / closing cylinder 15. When the operation lever 33 is operated along the first operation guide 30, the first engagement plate 38 is operated, and when the operation lever 33 is operated along the second operation guide 31, the second operation guide 33 is operated. The engagement plate 39 operates.

  Part C of the engaging portions 38a and 39a of the first engaging plate 38 and the second engaging plate 39 overlaps in plan view. When the operation lever 33 is operated along the third operation guide 32 (engagement holes 38b, 39b), both the first engagement plate 38 and the second engagement plate 39 are engaged with the operation lever 33 and operated. Thus, both the first valve operating body 36 and the second valve operating body 37 operate. In other words, the third operation guide 32 is a guide for expanding and contracting both the lifting cylinder 13 and the opening / closing cylinder 15 and is used when the operator quickly performs the grass discharging operation.

  As another operation for discharging the grass, a case where the grass collecting container 9 is desired to discharge grass at a desired height will be described. First, the operation lever 33 is moved along the first operation guide 30 to the middle position on the ascending side j. To do. Then, the raising / lowering cylinder 13 is extended by the amount of movement of the first engagement plate 38, and the grass collection container 9 maintains its raised position. Then, the operation lever 33 is returned to the neutral position N and moved to the second operation guide 31, and the second engagement plate 39 is operated to move to the opening side h. Then, the opening / closing cylinder 15 is extended by the amount of movement of the second engagement plate 39, and the opening / closing lid 14 maintains its open position. Similarly, the raising / lowering cylinder 13 can be separately operated for the lowering side k and the closing side t of the opening / closing lid 14.

  FIG. 6 shows an operation guide having another shape based on the same technical idea as FIG. The difference is that the third operation guide 32 shown in FIG. 5 is provided on an extension line on the rising side j of the first operation guide 30. The reference numerals in FIG. 6 are attached according to the reference numerals in FIG.

  7, reference numeral 40 denotes a mounting table for mounting and storing the grass collection container 9 when the grass collection container 9 is removed from the traveling vehicle body 1. As shown in FIG. 1 during grass cutting and grass discharging operations. It is unnecessary. The opening / closing cylinder 15 is covered with a cover 15a. The hydraulic hose 35 for the opening / closing cylinder 15 is provided along the elevating arm 12, indicating that the outer periphery of the hydraulic hose is covered with a cover 35a.

  The difference between the riding type mowers of FIG. 7 and FIG. 1 is that the opening / closing cylinder 15 of FIG. 1 is composed of a hydraulic cylinder independent of the traveling vehicle body 1 side, and is expanded and contracted by an opening / closing cylinder motor (not shown). On the other hand, the hydraulic hose 35 for the opening / closing cylinder 15 in FIG. 7 is different from the traveling vehicle body 1 along the lifting arm 12. According to the configuration of FIG. 1, there is no need to pipe the hydraulic hose 35 along the elevating arm 12, so that there is an advantage that the appearance is improved and the cost is reduced.

1 Traveling body 8 Mowing device (mowing unit)
9 Grass collecting container 12 Lifting arm 13 Lifting cylinder 14 Opening / closing lid 15 Opening / closing cylinder 20 Operation lever 20a Holding part 22 Opening / closing switch (operation switch)
24 Limit switch for lifting (rising detection means)

Claims (4)

In the riding type mower with the grass cutting part and the grass collecting container provided at the rear part of the traveling vehicle body,
The grass collection container is moved up and down by the lifting arm and configured to open and close the lid,
The lifting arm is configured to move up and down with a lifting cylinder, and the opening and closing lid is configured to open and close with an opening and closing cylinder.
An operating lever for operating the lifting cylinder and the opening / closing cylinder is provided, and the operating lever moves along the operating guide. The operating guide opens and closes the first operating guide for operating the lifting cylinder and the opening / closing cylinder. And a third operation guide for operating both the lift cylinder and the open / close cylinder together.   The first operation guide, the second operation guide, and the third operation guide are provided in parallel, the center position of each operation guide is set to the neutral position, and the neutral position is communicated with the movement guide, so that the single operation is performed. The riding lawn mower according to claim 1, wherein the lever is configured to be movable between the operation guides. In the riding type mower with the grass cutting part and the grass collecting container provided at the rear part of the traveling vehicle body,
The grass collection container is moved up and down by the lifting arm and configured to open and close the lid,
The lifting arm is configured to move up and down with a lifting cylinder, and the opening and closing lid is configured to move up and down with an opening and closing cylinder.
Provide operating means to operate the lifting cylinder and opening / closing cylinder,
A riding-type grass mower characterized in that the operating means is provided with an operating lever for operating the lifting cylinder, and an operating switch for operating the opening / closing cylinder is provided at a grip portion of the operating lever.   An elevating detection means is provided for detecting that the elevating arm is raised above the set position by the elongating operation of the elevating cylinder, and after the elevating detection means detects that the elevating arm is raised above the set position, the opening / closing cylinder performs the elongating operation 4. The riding lawn mower according to claim 3, wherein the opening and closing lid is opened.

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