JP4166158B2 - Walking mower - Google Patents

Description

  The present invention relates to a walk-type mower capable of cutting a slope such as a farm road.

  As a walk-type mower capable of cutting the slope, a pair of left and right traveling wheels are installed on the front and rear of the mowing unit with a cutting blade that is driven to rotate in the cutting blade housing, and the direction of the mowing unit is changed to the front and rear. One equipped with a possible steering handle is known (see, for example, Patent Document 1).

JP 2001-238514 A

  In the conventional walking-type grass mower shown in Patent Document 1, the weeds on the slope are cut away while reciprocating along the contour line by repeating the forward and backward movement with the steering handle 6 facing sideways. However, some of the mowing grass and pebbles on the ground may be jumped off by the rotating cutting blade and pass under the housing and jump out to the side of the aircraft. When turning the slope, the grass and pebbles may jump out toward the worker who moves along the side of the aircraft.

  In order to solve such a problem, it is conceivable to provide a rubber drooping cover at the lower end of the peripheral wall of the housing. However, in this type of walking type mower, the front, rear, left and right corners of the cutting blade housing are recessed. In order to reduce the size of the fuselage by storing the running wheels here, the peripheral wall of the recessed portion for accommodating the wheel formed in the blade housing and the outer periphery of the wheel are sufficiently close to each other. There is a possibility that the drooping cover provided on the peripheral wall of the part is caught by the lug on the outer periphery of the wheel. In addition, if the space between the peripheral wall of the recessed portion and the outer periphery of the wheel is sufficiently opened in order to avoid the drooping cover from being caught, the front and rear wheel space is increased, and downsizing of the airframe in the front-rear direction is hindered. Therefore, there was a problem in providing a dripping cover to prevent the cut grass and pebbles from popping out.

  The present invention has been made paying attention to such points, and in a walk-type grass mower capable of cutting a slope, it is possible to project the laterally outward of the aircraft such as mowing grass and pebbles while reducing the size of the aircraft. The main purpose is to be able to prevent it effectively.

According to a first aspect of the present invention, a pair of left and right traveling wheels are provided on the front and rear of a mowing unit provided with a cutting blade that is rotationally driven in the cutting blade housing, respectively, and a steering handle that can be reoriented in the front and rear is provided on the mowing unit. A walking mower equipped with
Mounting the formed gap side cover covering the lateral outer side to the cutting blade housing between the cutting blade housing and running wheels,
Forming a recessed portion on the outer surface of the traveling wheel,
The free end portion on the wheel side of the side cover is bent toward the inward side of the vehicle body outer edge of the traveling wheel, and separated from the axle of the traveling wheel to enter the recessed portion. It is characterized by.

  According to the above configuration, weeds on the slope can be mowed by repeating the forward and backward movement in a state where the steering handle is swung to the operator located on the road surface side. In this case, even if the grass and pebbles that are bounced off by the cutting blade pass through the lower end of the cutting blade housing and jump out to the side of the fuselage, they will be received by the side cover and will move to follow the side of the aircraft. It does not jump out strongly.

In this case, the side cover that catches mowed grass and pebbles that protrudes laterally outward from the gap between the cutting blade housing and the traveling wheel is located on the lateral outer side of the traveling wheel, so that it is caught by the lug on the outer periphery of the traveling wheel. There is no such thing as getting involved. Accordingly, even in the configuration in which the traveling wheel is accommodated and disposed in the recessed portions formed in the front, rear, left and right corners of the cutting blade housing, the peripheral wall of the recessed portion for accommodating the wheel and the outer periphery of the wheel can be sufficiently brought close to each other. It becomes easy to make the interval small.
According to the above configuration, since the free end portion on the wheel side of the side cover is inward of the outer end of the wheel, the grass in the uncut area will enter between the free end portion of the side cover and the traveling wheel. Easy to avoid.

As described above, according to the first invention, in the walking type grass mower capable of suitably cutting the slope with the steering handle turned sideways, the cut-out of the aircraft such as mowing grass and pebbles can be carried out laterally while reducing the size of the aircraft. Can be effectively prevented. Moreover, it can drive | work without the clogging of the grass inside a side cover.

According to a second invention, in the first invention,
The base portion of the steering handle is installed at one side of the mowing portion, and the gap between the front and rear traveling wheels and the cutting blade housing where the handle base is unevenly distributed is laterally outward from the side cover. It is comprised so that it may be covered with.

  According to the above configuration, in the slope mowing work, the steering handle is swung to the lateral side where the handle base is unevenly distributed, and the cut grass and pebbles fly to the operator holding the horizontally driven steering handle. This is effectively prevented by the side cover.

According to a third invention, in the first or second invention,
The traveling wheel is pivotally supported on the free end side of a support arm that is arranged to be able to swing up and down at the front, rear, left and right locations of the mowing unit, and the ground height of the mowing unit can be changed and adjusted by adjusting the swinging of the support arm. The side cover is configured to be elastically deformable, and the free end portion on the wheel side of the side cover enters the recessed portion of the traveling wheel even when the distance between the traveling wheel and the cutting blade housing is maximum. Thus, the length of the side cover free end portion in the front-rear direction is set.

  According to the above configuration, when the support arm is swing-adjusted to change the cutting height, the traveling wheel pivotally supported on the free end of the support arm is also displaced in the front-rear direction. The front-rear direction interval changes, but even if the front-rear direction interval is the largest, it is covered with a side cover from the outside to prevent the cut grass and pebbles from popping out. In addition, the state where the free end portion of the side cover on the side of the wheel always enters the recessed portion of the traveling wheel regardless of the position change of the traveling wheel is maintained, so that uncut grass can enter and clog the inside of the side cover. It is avoided in advance.

Therefore, according to the third aspect of the invention, the above-described effects of the first or second aspect of the invention can be accurately exhibited while the cutting height can be changed.

According to a fourth invention, in any one of the first to third inventions,
The side cover that covers the gap between the front traveling wheel and the cutting blade housing and the side cover that covers the gap between the rear traveling wheel and the cutting blade housing are configured in series, and the lower end of the side cover is It extends below the lower end of the cutting blade housing.

  According to the above configuration, one side cover can prevent the cutting grass and pebbles from jumping out of the gap between the traveling wheel and the cutting blade housing, and the cutting grass and pebbles from the lower end of the cutting blade housing. Compared to the case where the side cover is attached for each part, the number of parts and the number of mounting steps are reduced, which is effective for cost reduction.

According to a fifth invention, in any one of the first to fourth inventions,
An upper cover that covers a gap formed between the cutting blade housing and the traveling wheel from above is attached to the cutting blade housing.

  According to the above configuration, the grass and pebbles that have jumped out into the gap between the cutting blade housing and the traveling wheel are received by the side cover and the upper cover, and are prevented from being scattered laterally outward and soaring upward. As a result, not only pretending to the operator but also the accumulation of mowing grass on the cutting blade housing is prevented, and the machine body cleaning operation after the mowing operation is simplified and the maintainability is improved.

  FIG. 1 shows the entire side surface of the walking mower according to the present invention, and FIG. 2 shows the entire plane. This walking type mower is equipped with traveling wheels 4 on the front, rear, left and right of a cutting blade 3 provided with a cutting blade 2 that is driven to rotate about a longitudinal axis P inside the cutting blade housing 1, and the mowing portion 3. The engine 5 is mounted as a driving part for driving the cutting blade 2 and the traveling wheel 4 at the central part of the, and the steering handle 6 whose direction can be changed is extended from the mowing part 3.

  The mowing unit 3 is provided with a pair of left and right main frames 10 formed by bending a plate material downwardly in a U-shape, and a drive case 12 is mounted on a stay 11 that extends between the front and rear intermediate portions of the left and right main frames 10. Are coupled and supported, and the engine 5 is mounted on an upper portion of the drive case 12.

  The engine 5 is a recoil start type vertical air-cooled gasoline engine, and its downward output shaft 5a and the input shaft 13 arranged on the upper side of the drive case 12 are connected to each other in a concentric manner via a centrifugal clutch 14. In addition, the input shaft 13 is equipped with a brake 15.

  As shown in FIG. 9, cylindrical support shafts 16 are rotatably supported horizontally at the front and rear ends of the left and right main frames 10, and the traveling arms are fixed to the support arms 17 fixed to the left and right ends of each cylindrical support shaft 16. An axle 18 to which the wheels 4 are connected is rotatably supported, and the front, rear, left and right traveling wheels 4 are synchronously driven forward or reversely as described later.

  Next, the transmission structure in the drive case will be described with reference to FIGS.

  A second shaft 21 is provided on the rear side of the input shaft 13 in the drive case 12, and a gear G 1 formed integrally with the lower end portion of the input shaft 13 and a gear G 2 key-connected to the upper half portion of the second shaft 21; Is coupled to the lower half of the second shaft 21, and a shift gear G <b> 3 is slidably fitted on the lower half portion of the second shaft 21 in an upward biased state by a spring 22. Further, below the input shaft 21, a cutting blade driving shaft 23 with the cutting blade 2 mounted on the lower end is disposed so as to be relatively rotatable, and a gear G4 connected to the cutting blade driving shaft 23 is connected to the shift gear G3. Always bite.

  The shift gear G3 constitutes a cutting blade clutch 24 that intermittently transmits power to the cutting blade drive shaft 23. The shift gear G3 is biased upward and engaged with the internal teeth 25 of the gear G2. “Clutch disengagement” in which the transmission to the cutting blade drive shaft 23 is cut off by shifting the gear G3 downward against the spring 22 and disengaging it from the internal teeth 25. A state is brought about. The shift gear G3 is engaged with a shift fork 27 that is swing-operated by the clutch operation shaft 26, and the operation lever 28 connected to the outer end of the case of the clutch operation shaft 26 is engaged with the lever guide 29. It is possible to hold the cutting blade clutch 24 energized and pressed in the “clutch disengaged” state.

  A third shaft 31 is provided upright on the right side of the input shaft 13 and the second shaft 21, and a pair of front and rear traveling output shafts 32a and 32b are provided on the right side of the case so as to protrude horizontally. A traveling high / low speed change mechanism 33 is provided on the third shaft 31, and a forward / reverse switching mechanism 34 is provided on both the output shafts 32a and 32b.

  The high / low speed changing mechanism 33 includes two large and small gears G5 and G6 that are key-connected to the second shaft 21, and two transmission gears G7 and G8 that are engaged with these gears and loosely fitted to the third shaft 31. The third shaft 31 is shifted in two steps of high and low by integrating one of the transmission gears G7 and G8 with the third shaft 31 as follows.

  In other words, the speed change operation shaft 35 is slidable up and down and is fitted in the upper biased state by the internal spring 36 inside the third shaft 31, and the drive pin 37 penetratingly connected to the speed change operation shaft 35 is provided in the first shaft 31. Projected outwardly from the upper and lower elongated holes 38 formed in the three shafts 31 and selectively engaged with the engagement grooves 39 formed in the inner periphery of the gear transmission gears G7 and G8. The shaft 35 is slid upward to integrate the large-diameter transmission gear G8 and the third shaft 31 so that the third shaft 31 is driven at a low speed, and the transmission operation shaft 35 is slid downward to reduce the small-diameter transmission gear G7. The third shaft 31 is driven at a high speed by integrating the third shaft 31 with the third shaft 31. The speed change operation shaft 35 is slid by a vertical swing operation of the speed change lever 40.

  The forward / reverse switching mechanism 34 is configured to be able to selectively extract the rotational powers in the rotational direction which are opposite to each other from the pair of front and rear traveling output shafts 32a and 32b protruding to the right side of the case. Forward / reverse switching is performed by transmitting power to the traveling wheels 4.

  In other words, the traveling output shafts 32 a and 32 b are arranged at positions spaced apart from each other by an equal distance from the axial center of the third shaft 31, and the worm gear 41 that is externally fitted and fixed to the lower half of the third shaft 31. In addition, a pair of worm wheels 42 loosely supported by the traveling output shafts 32a and 32b are respectively engaged from the front and the rear, and the worm gears 41 are decelerated greatly in directions opposite to each other by rotation of the worm gear 41 in a fixed direction. Are driven to rotate.

  The front traveling output shaft 32a has a forwardly driven worm wheel 42 and a forward clutch 43a connecting the output shaft 32a. The rear traveling output shaft 32b is reversely driven. A reverse clutch 43b for connecting the worm wheel 42 and the output shaft 32b is provided.

  These clutches 43a and 43b are "engaged with clutch" by energizing and shifting the clutch member 44, which is splined to the traveling output shafts 32a and 32b, by a spring 45 and engaging and connecting to the worm wheel 42 from the side surface. The clutch 44 is reversely shifted against the spring 45 to release the engagement with the worm wheel 42, thereby “clutch disengagement”. The engagement claw 44a formed at the end of the clutch member 44 has a worm wheel. The head 46 of the bolt 46 screwed on the side face 42 is engaged in contact from the circumferential direction. The worm wheel 42 is formed by cutting a copper alloy so as to be smoothly engaged and driven by the worm gear 41. In order to increase the engagement strength and durability with the clutch member 44, the engagement claw The heads 44a and 46 are quenched.

The operation shaft 48 of each shift fork 47 for operating the clutch member 44 in the forward clutch 43a and the reverse clutch 43b is a single forward / reverse switching lever provided swingably around the fulcrum p near the tip of the steering handle 6. 49 is connected to each other via a wire 50, and the clutch 50 is brought into a clutch engagement state when the wire 50 is loosened , and the clutch disengagement state is brought about when the wire 50 is pulled beyond a predetermined amount. ing. Here, both the wires 50 are distributed to the left and right of the fulcrum p and connected to the forward / reverse switching lever 49, and both the wires 50 are operated in a contradictory manner by swinging the forward / backward switching lever 49.

According to the above configuration, when the forward / reverse switching lever 49 is operated to the “forward” position and is latched and held by the lever guide 51, the wire 50 corresponding to the forward clutch 43a is loosened and the forward clutch 43a is engaged. Then, the wire 50 corresponding to the reverse clutch 43b is largely pulled to disconnect the reverse clutch 43b .
When the forward / reverse switching lever 49 is operated and held in the “reverse” position, the wire 50 corresponding to the forward clutch 43a is pulled to disconnect the forward clutch 43a, and also corresponds to the reverse clutch 43b. The wire 50 is loosened and the reverse clutch 43b is engaged.
Further, when the forward / reverse switching lever 49 is operated and held in the “neutral” position, the forward clutch 43a and the reverse clutch 43b are both disconnected by being pulled by the wires 50. By operating to this “neutral” position, the transmission of power to the traveling system can be cut off and the traveling wheel 4 can be put into the idle state, and the airframe can be pushed by hand. Further, the engine is started in a state where the forward / reverse switching lever 49 is switched and held at the “neutral” position.

  Sprockets 55a and 55b are attached to the outer ends of the traveling output shafts 32a and 32b, respectively, and a sprocket 57 is also attached to the right end of the transmission shaft 56 inserted and supported by the cylindrical support shaft 16 at the front and rear ends of the main frame. The chain 58 is wound around the sprockets 55 a, 55 b, 57 in a series, and is stretched without loosening via the tie toner 59 and the tension roller 60.

  The left and right ends of the transmission shaft 56 and the axle 18 are linked and connected by a gear reduction mechanism 61. The gear reduction mechanism 61 is configured by engaging a small-diameter gear G9 connected to the end of the transmission shaft 56 and a large-diameter gear G10 connected to the axle 18, and the entire gear reduction mechanism 61 is While being accommodated in a recessed space 62 a formed inside the traveling wheel 4, the opening of the recessed space 62 a is closed by a fixed-side member that supports the gear reduction mechanism 61.

  As shown in FIGS. 11 and 12, the traveling wheel 4 is configured as a sheet metal press wheel provided with a recessed space 62 a facing the body and a bowl-shaped recessed portion 62 b facing the body, and the support arm 17. The inward opening of the recessed space 62a is blocked by the outer peripheral flange portion of the disc-shaped lid 63 attached to the inner space being sufficiently close to or slidably contacting the inner periphery of the recessed space 62a. It has become. In addition, an inspection port 65 that can be opened and closed by a removable cover 64 is formed at an appropriate position of the lid 63 so that foreign matter that has entered the recessed space 62a can be discharged and removed arbitrarily. Yes. Further, a rectilinear plate 66 having a circular outer peripheral edge is integrally extended in a flange shape on the outer periphery of the traveling wheel 4, and propulsion lugs 67 formed by bending and erecting both ends of the metal strip are projected at a constant pitch in the circumferential direction. ing. Note that the propulsion lug 67 protrudes at the same height as the outer peripheral diameter of the rectilinear plate 66, or slightly lower than that, so that traveling vibration is less likely to occur when traveling on flat ground. Further, since a shear pin is used for the connecting pin 18a between the traveling axle 18 and the wheel hub 4a, the connecting pin 18a is broken when an excessive traveling load is applied, and damage to the traveling transmission system is avoided. ing.

  As shown in FIG. 2, the front, rear, left and right traveling wheels 4 are disposed in front of and behind a cutting blade cover 72 constituting the cutting blade housing 1 so as to be within the lateral width of the cutting blade housing 1. A gap c opened laterally outward is formed between the cover 72 and the traveling wheel 4.

  An operating arm portion 17a refracted from the base of the front and rear support arms 17 positioned on the left side and a cutting height adjustment lever 68 erected on the right side of the central portion of the mowing portion 3 so as to swing back and forth are linked rods. 69, the cutting height adjusting lever 68 is swung back and forth, whereby the front and rear and left and right support arms 17 rotate together with the cylindrical support shaft 16 so that all traveling wheels 4 are in the same direction. The height of the cutting blade 2 with respect to the ground, that is, the cutting height can be changed by raising and lowering by the same amount. In this example, the four locking portions formed with the cutting height adjusting lever 68 on the fixed lever guide 70 It is possible to change the cutting height into four stages by selecting and engaging in.

  The cutting blade housing 1 constituting the mowing unit 3 includes front and rear top plates 71 attached to the left and right main frames 10, left and right cutting blade covers 72 projecting laterally outward from the main frame 10, and a top plate. 71 is configured to cover the cutting blade rotation trajectory with rubber drooping covers 73 attached to the front and rear ends of 71, and the left and right cutting blade covers 72 have dimensions corresponding to the replacement or cutting blade diameter when damaged. The main frame 10 is detachably bolted so that it can be replaced with the thigh.

  The planar shape of the entire cutting blade housing 1 configured as described above is a shape in which recessed portions are formed in the front, rear, left and right corners, and the traveling wheel 4 is provided in each recessed portion. The front, rear, left and right traveling wheels 4 are accommodated within the lateral width of the cutting blade housing 1. A gap c opened laterally outward is formed between the cutting blade cover 72 and the traveling wheel 4.

  Of the cutting blade covers 72 constituting the left and right parts of the cutting blade housing 1, the cutting blade cover 72 is bounced off by the cutting blade 2 on the lateral outer surface of the cutting blade cover 72 on the side where the steering handle 6 is unevenly distributed. A side cover 78 for receiving cut grass and pebbles popping out from the lower end of the head and the gap c is attached. The side cover 78 is made of an elastically deformable plate material made of rubber or soft resin. The side cover 78 is attached to the cutting blade cover 72 while being held by a metal abutting member 79 provided along the upper end side thereof. Bolts are connected.

  The side cover 78 has a vertical width that extends downward from the lower end of the cutting blade cover 72 and extends in a cantilevered manner at the front and rear, and front and rear free ends 78 a are formed on the outer surface of the traveling wheel 4. Further, it is curved to the inside of the machine body so as to enter the recessed portion 62b, and the planted uncut grass is prevented from entering and clogging between the side cover 78 and the traveling wheel 4. Further, even if the traveling wheel 4 is adjusted by swinging up and down to adjust the cutting height, the gap c is always covered from the side by the side cover 78 even if the size of the gap c changes. The extension length to the front and back of the part 78a is set.

  That is, if the support arm 17 is swung upward to displace the traveling wheel 4 in order to adjust the cutting height to a low level, the traveling wheel 4 moves away from the cutting blade cover 72 in the front-rear direction. The gap c increases, but the extension length of the side cover 78 in the front-rear direction is set so that the free end portion 78a of the side cover 78 enters the recessed portion of the traveling wheel 4 even when the gap c is maximized. It is.

  Further, an upper cover 80 that covers the gap c formed between the cutting blade cover 72 and the traveling wheel 4 from above is cantilevered before and after the upper surfaces of the left and right cutting blade covers 72 constituting the cutting blade housing 1. The mowing grass rising from the gap c is prevented from accumulating on the cutting blade housing 1. The upper cover 80 is formed of an elastically deformable plate material made of rubber or soft resin, like the side cover 78, and has a front-rear length that does not get caught even if it contacts the propulsion lug 67. A notch 80a that avoids the straight traveling plate 66 of the traveling wheel 4 is provided.

  As shown in FIGS. 15 and 16, the cutting blade 2 is provided on the upper and lower surfaces at four circumferential positions on a disc-shaped cutting blade support plate 74 connected and fixed to the cutting blade drive shaft 23. Is pivotally connected around a fulcrum q parallel to the rotational axis of the blade so that the cutting blade 2 can swing backward when it acts on a stone or a hard foreign object on the ground. Each cutting blade 2 is formed by forming a pivot connection hole and a cutting edge on a cutting blade material of the same specification formed by refracting a band plate material at a predetermined angle, and is attached to the upper surface of the cutting blade support plate 74. The cutting blade 2 is attached in a posture in which the cutting action portion is refracted upward, and the cutting blade 2 mounted on the lower surface of the cutting blade support plate 74 is attached in a posture in which the cutting action portion is refracted downward. The grass is shredded by alternately arranging the cutting blades 2 having different cutting heights in the circumferential direction. Further, an anti-winding drum 75 is attached to the upper surface of the cutting blade support plate 74, and blades 76 for discharging the mowing grass are attached in a substantially radial manner, so that the mowing grass is diffused and left in the passage marks of the mowing portion 3. It has become so. A disc-shaped guide cover 77 is fixed to the ceiling portion in the cutting blade housing 1.

  The steering handle 6 is configured by connecting a loop handle portion 6b to a free end of a handle body 6a made of a round pipe material, and on the right side of the engine (driving portion) 5, front and rear traveling wheels. 4 is extended in a cantilevered manner from a low position close to the upper surface of the cutting blade housing 1 at a position close to the middle position of 4, and can be adjusted to change its orientation around the vertical axis x and up and down around the horizontal axis y. It is configured to be swing adjustable. As shown in FIG. 20, the loop handle portion 6b is mounted so as to be adjustable within the angle range of the long hole 81 around the horizontal axis z, and is fixed at an arbitrary angle by tightening the set bolt 82. It can be done.

  As shown in FIGS. 17 and 18, the stay 11 fixed to the right main frame 10 is provided with a vertical boss 83, and the handle fulcrum 84 formed of a cylindrical shaft can be rotated from above the vertical boss 83. And is supported by a pin 85 attached to the downward projecting portion. A flange 86 is fixed to the outer periphery of the upper and lower intermediate portions of the handle support shaft 84, and this flange 86 is received and placed on a circular support plate 87 provided continuously with the upper end of the vertical boss 83. Further, a lateral boss 88 constituting the horizontal axis y is fixed to the upper end of the handle support shaft 84, and the base end of the steering handle 6 is pivotally connected to the lateral boss 88 so as to be swingable up and down.

  A pivot lock pin 90 supported via a boss 89 is attached to the flange 86 so that the pivot lock pin 90 can be withdrawn and retracted below the flange, and the pivot lock pin 90 is engaged in a predetermined circumferential direction of the support plate 87. A plurality of lock holes 91 are provided to support the steering handle 6 together with the handle support shaft 84 and the vertical axis x by pulling the turning lock pin 90 upward against the lock biasing spring 92 built in the boss 89. The swivel lock pin 90 can be urged and moved downward at a desired swivel position and engaged with the lock hole 91 so that the steering handle 6 can be swiveled and fixed at that position. The steering handle 6 can be reoriented within a predetermined range (see the range indicated by the arrow A1 in FIG. 23) from the backward posture to the forward posture shown in FIG.

  The direction change range of the steering handle 6 is limited by the contact between the stopper pin 93 projecting from the support plate 87 and the end of the flange 86, and the steering handle 6 whose direction has been changed to the forward limit position is seen in a plan view. In FIG. 23, the steering handle 6 whose orientation has changed along the longitudinal line L passing through the vertical axis x in FIG. A rearward inclined posture exceeding a suitable small angle inside the aircraft, the loop handle portion 6b on the handle free end side is positioned behind the aircraft, and an operator who walks from the rear of the aircraft grips the loop handle portion 6b in a natural posture. Be able to.

  Further, a oscillating lock pin 95 is mounted on a boss 94 provided on the lower surface near the base of the handle body 6a in a protruding and urged state toward the horizontal axis y, and the flange 86 is centered on the horizontal axis y. A lock plate 96 curved in a circular arc shape is fixed, and a plurality of lock holes 97 for engaging and supporting the oscillating lock pin 95 urged and protruded are provided in the lock plate 96 at an appropriate pitch in the vertical direction. The steering handle 6 can be swung up and down around the y axis of the horizontal axis by retracting the rocking lock pin 95 against the internal spring 98 and pulling it out of the lock hole 97. The steering handle 6 can be fixed at the height position by causing the rocking lock pin 95 to be biased and projecting into the lock hole 97. The upward swing of the steering handle 6 is limited by the contact between the stopper portion 96a formed at the upper end of the lock plate 96 and the boss 94.

  20 and 21, a pair of grip levers 100 and 101, a turning lock pin 90, and a swinging lock pin 95 provided on the left and right of the steering handle 6 near the base of the loop handle portion 6b are operated. They are linked by the wires 102 and 103, and by operating the grip levers 100 and 101 together with the base of the loop handle portion 6b and pulling the operation wires 102 and 103, the swing lock pin 90 or the swing lock pin 95 is operated. The swing lock or the swing lock can be released by pulling out and retreating, and after releasing the lock, the steering handle 6 is continuously held and the direction or height is arbitrarily changed, and the desired turning direction or The handle can be locked by releasing the grip levers 100 and 101 at a height. It is.

  The loop handle portion 6b of the steering handle 6 is provided with a gate-shaped accelerator lever 105 that can swing up and down around a fulcrum r and is biased upward. Two operation wires 106 and 107 are extended from the base portion of the accelerator lever 105, and one operation wire 106 is linked to a speed control mechanism (not shown) provided in the engine 5 and the other operation is performed. Wires 107 are linked to the brakes 15 respectively. Then, the accelerator lever 105 is pulled down and rocked against the upward biasing force and is gripped together with the loop handle portion 6b, thereby pulling both the operation wires 106 and 107 together to increase the rotational speed of the engine 5 (accelerator). When the engine speed increases, the centrifugal clutch 14 is actuated and power is transmitted to the input shaft 13 to enable driving and cutting blade driving. Further, when the grip of the accelerator lever 105 is released, the accelerator lever 105 returns and swings upward, the engine 5 is rotated down to the idling (accelerator down), the centrifugal clutch 14 is disengaged, and the power to the traveling system and the cutting blade drive system is released. The transmission is cut off and the input shaft 13 is braked by the operation of the brake 15 so that the inertial rotation of the cutting blade 2 is promptly stopped.

  The mower is configured as described above, and when cutting weeds on a slope such as a farm road, as shown in FIG. 3, the mowing unit 3 is positioned on the slope in a posture along the contour line, and is operated. The handle 6 is turned and fixed in the lateral direction toward the farm road, and in this state, the mowing unit 3 is moved forward or backward along the contour line. On a wide slope with a large length in the inclination direction, the traveling position is set to the position of the slope by repeatedly pushing back and forth on the steering handle 6 or pulling up the slope. It will be shifted in the tilt direction.

  As described above, when the steering handle 6 is turned sideways, the forward direction and the reverse direction with respect to the aircraft may not be known. Therefore, the lever guide 108 of the forward / reverse switching lever 49 is attached to the front and rear ends of the mowing unit 3. It is preferable to display the forward position and the reverse position with a color corresponding to the color mark.

  Further, in this mower that is often used on a slope, the fuel tank 109 is provided so as to be positioned on the lower slope, and the replenishing port 110 is provided in a direction toward the upper slope. Further, in order to make it easier for an operator on the slope to start the recoil start of the engine 5 from the upper side of the slope, the start knob 111 located on the rear side of the engine 5 is located on the left lateral side where the base of the steering handle 6 is installed. It is provided so that it can be pulled.

  In addition, this invention can also be implemented with the following forms.

  (1) In the embodiment, the side cover 78 is provided only on the side where the steering handle 6 is unevenly distributed so as to prevent the cut grass and pebbles from jumping out on the side where the operator stands in the slope mowing work. Alternatively, the side cover 78 may be attached.

  (2) In the embodiment, the gap c formed between the front and rear traveling wheels 4 and the cutting blade housing 1 is covered with a single side cover 78 that is connected to the front and rear. It can also be divided and implemented. With such a divided structure, replacement when a part of the side cover is damaged becomes easy.

  (3) In the embodiment, the side cover 78 and the upper cover 80 are separated from each other, but a cover body in which both are integrally formed can be bent and attached.

(4) As shown in FIG. 27, in the same way as when the steering handle 6 whose direction has been changed to the forward limit position is changed to the rear limit position, the inside of the aircraft from the front-rear direction line L passing through the vertical axis x in plan view. It is also possible to set the direction change range (refer to the range indicated by the arrow A2 in FIG. 27) so as to have a forward inclined posture exceeding, and according to this, the maneuvering when the operator follows from the rear of the aircraft is possible. It becomes easy.

Overall side view of walking mower Overall plan view of the walking type mower Front view showing the state of mowing on the slope Longitudinal front view of drive case Longitudinal front view of main part showing cutting blade clutch disengagement state Longitudinal side view showing high and low speed change mechanism Cross-sectional plan view of the forward / reverse switching mechanism Plan view of the forward / reverse switching operation section Plan view showing airframe structure and running section Side view showing the running section Cross-sectional plan view showing wheel drive structure Longitudinal side view of traveling wheel Top view of the blade housing Exploded perspective view of cutting blade housing Side view of the main part of the mowing section Top view of the cutting blade Vertical side view showing the attitude adjustment structure of the steering handle Plan view showing the attitude adjustment structure of the steering handle Vertical section of swivel lock structure Longitudinal side view showing the operating part of the steering handle Plan view showing the operating part of the steering handle Front view of forward / reverse switching operation section Overall plan view with the steering handle facing backwards Cross-sectional plan view showing traveling wheels and side covers Side view showing traveling wheels and side covers Exploded perspective view showing side cover mounting structure The whole top view in the state where the steering handle turned back in other embodiments

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting blade housing 2 Cutting blade 3 Grass cutting part 4 Traveling wheel 6 Steering handle 17 Support arm 62b Recessed part 78 Side cover 78a Free end part 80 Upper cover

Claims (5)

A walking type equipped with a pair of left and right traveling wheels on the front and rear of a mowing portion provided with a cutting blade that is rotationally driven in the cutting blade housing, and equipped with a steering handle that can change the front and rear directions on the mowing portion. A mower,
Mounting the formed gap side cover covering the lateral outer side to the cutting blade housing between the cutting blade housing and running wheels,
Forming a recessed portion on the outer surface of the traveling wheel,
The free end portion on the wheel side of the side cover is bent toward the inward side of the vehicle body outer edge of the traveling wheel, and separated from the axle of the traveling wheel to enter the recessed portion. A walking mower characterized by The base portion of the steering handle is installed at one side of the mowing portion, and the gap between the front and rear traveling wheels and the cutting blade housing where the handle base is unevenly distributed is laterally outward from the side cover. The walking mower according to claim 1 , wherein the walking mower is configured to be covered with The traveling wheel is pivotally supported on the free end side of a support arm that is arranged to be able to swing up and down at the front, rear, left and right locations of the mowing unit, and the ground height of the mowing unit can be changed and adjusted by adjusting the swinging of the support arm. The side cover is configured to be elastically deformable, and the free end portion on the wheel side of the side cover enters the recessed portion of the traveling wheel even when the distance between the traveling wheel and the cutting blade housing is maximum. The walk-type mower according to claim 1 or 2, wherein the length in the front-rear direction of the side cover free end is set as described above. The side cover that covers the gap between the front traveling wheel and the cutting blade housing and the side cover that covers the gap between the rear traveling wheel and the cutting blade housing are configured in series, and the lower end of the side cover is The walking mower according to any one of claims 1 to 3 , wherein the mowing blade extends downward from a lower end of the cutting blade housing. The walking grass mowing according to any one of claims 1 to 4 , wherein an upper cover that covers a gap formed between the cutting blade housing and the traveling wheel from above is attached to the cutting blade housing. Machine.

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