JP4109638B2 - Traveling lawn mower - Google Patents

Description

  The present invention relates to a traveling lawn mower in which a mowing mechanism such as a rotary mower is attached to a traveling machine body so as to perform lawn mowing while traveling on the traveling machine body.

Patent Document 1 as a prior art relates to this traveling lawn mower, of a traveling machine body supported by a pair of left and right front wheels and a rear wheel, a rotary mower or the like at a portion between the front wheel and the rear wheel. The turf grass cut by this cutting mechanism is installed in a catcher box provided at the rear part of the traveling aircraft body, through the exhaust dust disposed so as to extend rearward between the two rear wheels. On the other hand, a traveling lawn mower is provided, in which the catcher box is rotatably provided at a position where the receiving port portion into the catcher box faces the rear end port of the discharged dust and a position where the catcher box faces downward. Are listed.
JP 2000-50716 A

  However, in this prior art, a support frame body is provided at the rear end of the exhaust dust so as to surround the discharge duct, and the catcher box is rotatably mounted on the support frame body. Therefore, the support frame must be configured to have a high rigidity by providing an appropriate reinforcing member, etc., so that not only the number of parts is increased, but the weight is significantly increased. There was a problem of increasing the number of tasks and increasing the size.

  This invention makes it a technical subject to eliminate this problem and to provide a traveling type lawn mower.

In order to achieve this technical problem, claim 1 of the present invention provides:
“At least a pair of left and right rear wheels supported by a pair of rear wheels, a front side of the rear wheels, a mowing mechanism, and a rear side of the rear wheels, a catcher box for receiving turf grass cut by the mowing mechanism. On the other hand, between each of the rear wheels, there is disposed a discharge duct for guiding the turf grass cut by the mowing mechanism to the catcher box, and further, the catcher box has a receiving port portion for the discharged dust. In a traveling lawn mower configured to be rotatable to a forward posture toward the rear end and a downward posture that is downward,
A rear end portion of a vehicle body frame extending in the front-rear direction of the traveling machine body is inserted into the catcher box from its receiving opening, and the catcher box is pivotally attached to the rear end portion. On the other hand, a gate-shaped frame member that surrounds the left and right sides and the upper side of the discharge duct is provided at the rear end portion of the discharge duct so as to be attached to the vehicle body frame, and between the frame member and the discharge duct. A plate member that closes the gap between them is provided, and the edge frame of the receiving port is in contact with the plate member when the catcher box is in a forward-facing posture. "
It is characterized by that.

Further, claim 2 of the present invention provides
“In the description of claim 1, the plate member is positioned on the front side by an appropriate size from the rear end port of the discharge duct.”
It is characterized by that.

Furthermore, claim 3 of the present invention provides
“In the description of claim 1 or 2, the frame member and the plate member are configured to be detachable.”
It is characterized by that.

  With the configuration according to claim 1, the catcher box can be supported by the vehicle body frame in the traveling machine body, while the catcher box is received when the receiving port is in a forward posture toward the discharge duct. Since the periphery of the plate member to which the edge frame of the mouth abuts is reinforced by a gate-shaped frame member attached to the frame so as to surround the discharge duct, the structure in the part is more than the conventional case. While reducing the number of points and maintaining a predetermined rigidity, it is possible to greatly simplify and reduce the weight and size.

  According to the second aspect of the present invention, when the catcher box faces forward and the edge frame of the receiving port is brought into contact with the plate member, the rear end port of the discharge duct is appropriately dimensioned. Since it protrudes into the catcher box, the cut turfgrass can be smoothly guided from the discharge duct into the catcher box while preventing leakage of the turfgrass to the outside.

  Furthermore, the configuration according to claim 3 makes it easy to assemble and disassemble, and the labor required for the assembly and disassembly can be greatly reduced.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In this figure, reference numeral 1 denotes a traveling machine body constituted by a pair of left and right body frames 1a extending in the front-rear direction. The traveling machine body 1 is composed of a pair of left and right front wheels 2 and a pair of left and right rear wheels 3 as well. An engine 4 is mounted on the upper surface of the front portion of the traveling machine body 1 and a steering handle 5 for steering the front wheels 2 so as to rotate simultaneously is provided. A steering seat 6 on which an operator sits is provided on the upper surface of the rear part of the traveling machine body 1. Furthermore, a front cowl 7 provided with a fender 7a covering the upper portions of the rear wheels 3 and a step base 7b on the front side portion of the control seat is provided on the upper surface of the traveling machine body 1. A bonnet cover 8 for the engine 4 is provided on the front cowl 7 so as to be openable and closable.

  The two rear wheels 3 are attached to the lower ends of brackets 9 fixed to the outer side surfaces of the two vehicle body frames 1a in the traveling machine body 1 so as to extend in the vertical direction.

  A rotary mower 10 serving as a mowing mechanism is formed by a pair of left and right front links 11 and a rear link 12 on the lower surface side of the traveling machine body 1 and between the front wheels 2 and the rear wheels 3. It is mounted so as to be movable up and down, and is configured to move up and down by the rotation of an elevating operation lever (not shown) disposed on the right side of the control seat 6.

  On the other hand, the rear portions of the two vehicle body frames 1a in the traveling machine body 1 are bent so as to be inclined obliquely upward toward the rear, and the rear wheels 3 are attached between the rear wheels 3 on the lower surface. A discharge duct 13 that guides the turf grass cut by the rotary mower 10 in the backward direction is disposed between the pair of left and right brackets 9 so as to extend rearward.

  Although not shown in the upper part of the exhaust duct 28 and the lower part of the control seat 6 in the vehicle body frame 1a of the traveling machine body 1, the rotation of the engine 4 is appropriately changed. A traveling mission mechanism for transmitting to both the rear wheels 3 is provided.

  A catcher box 14 for receiving turf grass cut by the rotary mower 10 is mounted on the rear portion of the traveling machine body 1 in the following structure.

  That is, the rear end portions 1a 'of the both body frames 1a protrude into the catcher box 14 from the receiving port 14a at the front end thereof, and the catcher box 14 is connected to the traveling body of the rear end portion 1a'. 1, a support shaft 15 extending in a direction perpendicular to the traveling direction, as shown by a solid line in FIG. 1, the receiving port 14a has a forward attitude toward the rear end port 13a in the discharge duct 13, and two points in FIG. As shown by the chain line, the catcher box 14 is pivotally mounted to the operation lever 16 disposed on the right side of the control seat 6 so that the receiving port 14a can pivot freely in a downward posture in which the receiving port 14a faces downward. When the operation lever 16 is moved to a lower position as shown by a solid line in FIG. Box 14 becomes forward-facing position, the operating lever 16, the catcher box 14 when the upper position as shown in FIG. 1 by the two-dot chain line is configured to be flat position.

  The entire catcher box 14 is covered with a breathable fabric or net except for the receiving port 14a.

  A frame member 18 formed by bending a hollow member into a gate shape so as to surround the left and right sides and the upper side of the discharge duct 13 is formed at the rear end opening 13a of the discharge duct 13. A pair of left and right plate members 19a and 19b that close the gap between the left and right side surfaces of the discharge duct 13 are disposed inside the frame member 18 so as to be detachably attached thereto by bolts (not shown). And a plate member 19c that closes a gap between the upper surface of the discharge duct 13 is detachably attached by fastening bolts (not shown) or the like, and the catcher box 14 is attached to the plate members 19a, 19b, and 19c. When the frame is in a forward-facing posture, the peripheral edge frame 14 a ′ at the receiving port 14 a is configured to abut on the inside of the frame member 18.

  On the other hand, as shown in FIG. 6, the plate members 19a, 19b, 19c are attached to the front side surface of the frame member 18 in the advancing direction of the traveling machine body, thereby appropriately dimensioning than the rear end port 13a in the discharge duct 13. S is located on the front side.

  Further, the rear end of the front cowl 7 is detachably attached to the frame member 18.

  With the configuration described above, the catcher box 14 can be directly supported by the vehicle body frame 1 a in the traveling machine body 1, while the catcher box 14 is in a forward-facing posture with the receiving port 14 a directed toward the discharge duct 13. The periphery of each plate member 19a, 19b, 19c to which the edge 14a 'of the receiving port 14a contacts is surely reinforced by a gate-shaped frame member 18 attached to the vehicle body frame 1a so as to surround the discharge duct 13. be able to.

  Further, when the catcher box 14 is in a forward-facing posture, the rear end port 13a of the discharge duct 13 protrudes into the catcher box 14 by an appropriate size S, so that the cut grass can be removed from the discharge duct 13 to the catcher box. 14 can be smoothly guided in a state where leakage of turf grass to the outside is prevented.

  Furthermore, since the frame member 18 and the plate members 19a, 19b and 19c are detachable, they can be easily assembled and disassembled.

  In the above-described configuration, a turfgrass sensor for detecting the amount of turfgrass accumulated in the catcher box 14 is provided on one of the plate members 19a and 19b on the left and right sides of the discharge duct 13, for example, the right plate member 19b. 20 is configured so that when a predetermined amount of turfgrass accumulates in the catcher box 14, the operator is notified of this, the cutting operation is stopped, or the catcher box 14 is placed in a downward posture. is doing. The turfgrass sensor 20 is configured to be able to reliably detect the amount of turfgrass by being provided within a height range from the bottom surface of the discharge duct 13 to half of the height dimension H of the discharge duct 13. The contact 20a is configured to face downward so that turf grass does not accumulate on the upper surface thereof.

It is a side view of a traveling type lawn mower. It is a top view of FIG. FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 2. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a sectional view taken along line VV in FIG. 3. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling body 1a Body frame 2 Front wheel 3 Rear wheel 4 Engine 5 Steering handle 6 Steering seat 10 Rotary mower 14 Catcher box 14a Receiving port 14a 'Edge frame 15 Support shaft 16 Operation lever 18 Frame member 19a, 19b, 19c Plate member 20 Turfgrass sensor

Claims (3)

A cutting mechanism for receiving the turf grass cut by the mowing mechanism on the front side of the rear wheels and the rear side of the rear wheels of the traveling body supported by at least a pair of left and right rear wheels, respectively. On the other hand, a discharge duct that guides the turf grass cut by the cutting mechanism to the catcher box is provided between the rear wheels, and the catcher box has a receiving port for the discharged dust. In a traveling lawn mower configured to be rotatable to a forward posture toward the rear end port and a downward posture to be downward,
A rear end portion of a vehicle body frame extending in the front-rear direction of the traveling machine body is inserted into the catcher box from its receiving opening, and the catcher box is pivotally attached to the rear end portion. On the other hand, a gate-shaped frame member that surrounds the left and right sides and the upper side of the discharge duct is provided at the rear end portion of the discharge duct so as to be attached to the vehicle body frame, and between the frame member and the discharge duct. A traveling lawn mower characterized in that a plate member that closes the gap therebetween is provided, and the edge frame of the receiving port abuts the plate member when the catcher box is in a forward-facing posture.   2. The traveling lawn mower according to claim 1, wherein the plate member is positioned on the front side by an appropriate size from the rear end port of the discharge duct.   The traveling lawn mower according to claim 1 or 2, wherein the frame member and the plate member are detachable.

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