JP2016048005A - Lawn sweeper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently loosen a lawn surface which has been trodden down, immediately after then, rake up dirt such as dust from the loosened lawn surface and collect the dust into a tank to clean up the lawn surface, and carry the collected dust to a dump yard.SOLUTION: In a lawn sweeper 1, dust on a lawn surface that has been raked up by a brush 6 rotated within a brush cover 5 arranged below a central portion of a vehicle body 3 including a driver's seat 2 on the front side and a hopper 4 at a carrier portion on the rear side is collected into the hopper 4 through an air duct 7. A loan loosening device 8 for loosening the lawn upper surface is fixed to a front lower side of the vehicle body, and the dust separated from the lawn upper surface is raked up by the brush 6 located at the rear position and is collected into the hopper 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lawn sweeper that travels while loosening the lawn top surface of an artificial lawn or natural lawn and collecting dust or the like separated from the lawn top surface.

  As is well known, when the lawn is an artificial lawn, anti-static rubber chips are inserted between a large number of thin, dense grasses sewn on the surface of the cloth base cloth, and sand and fillers There are various kinds of mixed things, such as being scattered, trash, falling leaves, or scattering of soil from nearby areas, so this can be stepped and solidified by the passage of people or cars, chairs etc. are placed locally If it is indented, it will not be able to absorb the impact when it falls. Therefore, there is a demand for a lawn cleaning vehicle that loosens the lawn surface, which is hardened by hardening the grass, and collects dust generated by the loosening.

  According to the artificial turf cleaning vehicle of Patent Document 1, the artificial turf surface is scraped up by brush means and collected in a dust bag through a hose.

Special table 2002-514957

  However, according to the artificial turf cleaning vehicle, the turf surface is only rubbed with a brush, so that there is a problem that the turf surface that has been hardened by stepping cannot be sufficiently loosened.

  The present invention has been made in view of the above circumstances. Immediately after fully unraveling the pressed turf surface, dust such as dust is scraped up and collected in a tank and collected in the tank. It was made for the purpose of cleaning the container and transporting the collected dust to the garbage dump.

The invention according to claim 1 is a lawn surface that is scraped up by a brush that is driven to rotate within a brush cover that is provided below a central portion of a vehicle body that includes a cockpit at the front and a hopper at the rear loading platform. In the lawn sweeper that collects the dust on the hopper through the wind tunnel,
A lawn sweeping device that loosens the lawn top surface is fixed to the front lower side of the vehicle body, and the lawn cleaning vehicle collects dust separated from the lawn top surface with a brush located at the rear position in a hopper.

According to a second aspect of the present invention, there is provided a loosening rotator that is rotatably supported at both ends on both side plates of the upper cover case, a drive source that rotates the loosening rotator, and a mounting portion of the vehicle body. The mounting part is provided in the upper cover case.

The invention according to claim 3 is characterized in that the loosening rotating body is fixed to the mounting plate fixed along the outer periphery in the longitudinal direction of the rotating shaft whose both ends are rotatably supported by the both side plates. The base of the spring part is fixed so that the side faces outward.

  According to a fourth aspect of the present invention, the turf unraveling device is fixed to the front lower side of the vehicle body, the other end of the drive cylinder having one end fixed to the front side of the lift arm whose rear side is rotatably fixed to the front lower side of the vehicle body. And the attached portion provided on the front end side of the lift arm whose front side moves up and down by the expansion and contraction of the drive cylinder and the attachment portion provided on the upper cover case are detachably fixed. .

  According to a fifth aspect of the present invention, a contact point between a locus of a spring portion of a spring tine serving as a tip of the loosening rotator and an upper surface of the lawn is positioned in front of the upper covering case of the lawn loosening device. There is provided a vertical height position adjusting device capable of adjusting the height position of the upper cover case.

  According to a sixth aspect of the present invention, the vertical height position adjusting device includes a support case fixed in front of an upper cover case, a roller support in which a roller that runs on the lawn upper surface is rotatably provided, and the support case. A guide post fixed to the roller support to guide the screw up and down, a screw rod formed on the outer periphery with a male screw threadedly engaged with a female screw part fixed to the guide post in the support case, and the screw There is provided an up / down adjustment handle fixed to a protruding portion of the rod from the column case, and a handle lock screwed to a screw rod between the up / down adjustment handle and the support case.

  The invention according to claim 7 is that two of the vertical height position adjusting devices are installed on both sides in front of the upper cover case.

  The eighth aspect resides in that an outrigger for stabilizing the posture of the lawn unraveling device is fixed behind the upper cover case.

  According to the first aspect of the invention, the brush is provided in the turf by the brush provided below the center of the vehicle body while traveling while loosening the turf surface that has been firmly treaded by the turf unraveling device provided at the lower front of the vehicle body. The relatively light dust that has been lifted up by the rotational force of the brush is collected in the hopper provided in the loading platform through the wind tunnel, Since it proceeds while cleanly cleaning the surface, it is possible to perform unwinding and cleaning at the same time with one cleaning car, and to perform efficient work.

According to the invention of claim 2, the turf unraveling device includes a unwinding rotating body that is housed and supported rotatably on both side plates of the upper cover case, a drive source that rotates the unwinding rotating body, Since the attachment portion to the vehicle body provided in the upper cover case is provided, the unwinding width of the entire vehicle width can be obtained, so that the work efficiency is improved. In addition, the efficiency is improved because it proceeds while loosening and rotating the rotating body with an independent drive source.

  According to the invention of claim 3, since the loosening rotary body is configured to face the tips of the spring portions of a large number of spring tines, the lawn surface can be loosened efficiently.

  According to the invention of claim 4, the turf unraveling device comprises a lift arm attached portion whose tip is movable up and down by a drive cylinder that is extendable in front of the vehicle body, and an attachment portion provided with an upper cover of the turf unraveling device. Therefore, if the lift arm is lifted by operating the drive cylinder in a place where loosening is not required, the lawn unraveling device can be lifted from the lawn surface and run easily. Also, when simply cleaning a place that does not require loosening, simply remove the fixed part of the mounting part and the mounting part and store the lawn loosening device separately so that only the dust on the lawn surface can be collected. It can be done efficiently. In addition, fuel consumption can be reduced by the lighter the car.

  According to the invention of claim 5, since the vertical height position adjustment device capable of adjusting the front height position of the case is provided in front of the upper cover case, the tip locus of the spring stein at the tip of the loosening rotary body and the lawn top surface It is possible to adjust the degree of contact to an optimal unwinding depth position.

  According to the invention of claim 6, the vertical height position adjusting device includes a support case fixed in front of an upper cover case, a roller support in which a roller running on the lawn upper surface is rotatably provided, and the support A guide column fixed to the roller support for guiding the case in the vertical direction; a screw rod formed on the outer periphery with a male screw threadedly engaged with a female screw unit fixed to the guide column in the support case; Equipped with an upper and lower handle fixed to the protruding portion of the screw rod from the support case and a handle lock screwed to the screw rod between the upper and lower handles and the support case. The height can be adjusted. In addition, by tightening with a handle lock, it does not loosen even if vibration occurs due to running on the uneven surface on the lawn surface.

  According to the seventh aspect of the present invention, since there are two vertical height adjusting devices on both sides of the front of the upper cover case, it is possible to operate while supporting the front of the device more stably than in the case of one.

  According to the invention of claim 8, the loosening device can be stably stored by the outrigger when not in use.

Whole side view of lawn sweeper Whole perspective view from the front of the lawn loosening device Cross-sectional explanatory diagram of the vertical height position adjustment device Overall perspective view of turf unraveling device from diagonally rear Overall perspective view of outrigger Illustration of collecting dust with a brush rotating in the brush cover Overall side view of the lawn loosening device lifted in the state of FIG. Whole perspective view with turf loosening device and lift arm separated Cross-sectional explanatory drawing Side view of the lawn loosening device with the outer case removed

  An embodiment of a lawn cleaning vehicle of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 6, the lawn cleaning vehicle has a cockpit 2 in the front, a hopper 4 in the rear part of the vehicle body 3, and a brush provided below the center of the vehicle body 3. In the lawn cleaning vehicle 1 for storing dust on the lawn surface scraped up by the brush 6 that is driven to rotate in the cover 5 in the hopper 4 through the wind tunnel 7, a lawn unraveling device 8 that loosens the lawn upper surface below the front of the vehicle body 3. , And thus the dust separated from the lawn top surface is collected in the hopper 4 as described above.

  As shown in FIG. 2, the lawn unraveling device 8 has a rotating shaft of the unwinding rotating body 11 on the both side plates 10 in an upper cover case 9 having an opening surrounded by the upper and outer peripheries and opened downward. The two ends of 12 are rotatably supported with the both ends being rotatably supported.

As clearly shown in FIG. 8, at the rear of the upper cover case 9 of the turf unraveling device 8, a detachable mounting portion 17 is paired with the mounted portion 16 of the lift arm 15 provided in front of the vehicle body 3. Is provided. As shown in the figure, the mounting portion 17 is formed by simply opening a bolt hole 17a in a plate fixed to the rear upper surface of the upper casing 9 and the lift arm is connected to the bolt hole 17a. The bolt hole 16a of the mounting portion 16 fixed to the tip of 15 is matched, and as shown in FIG. 2, a bolt 18 is screwed and fixed detachably. The bolt 18 has a long shaft so that the bolt head protrudes from the top cover case 9 so that the tool can be easily used, and a nut 18a is fixed in the middle so as not to exceed the screwing amount. Yes. A handle 19 is provided on the upper surface of the upper cover case 9 so that the lawn unraveling device 8 can be easily carried by hand.

  The lift arm 15 is provided at the other end of a drive cylinder 21 composed of a hydraulic cylinder or the like that is rotatably supported at the rear side of the vehicle body 3 at the front lower side of the vehicle body 3 and fixed at the front side to the vehicle body 3 at one end side. The side is attached. As a result, by operating the driver's drive cylinder 21 in the cockpit 2, when the drive cylinder 21 is extended, the front side of the support cylinder 20 is rotated downward about the shaft support 20, so that the lawn loosening device 8 is landed and the lawn. You will be able to loosen the surface. On the other hand, when the drive cylinder 21 is contracted, the front side rotates about the shaft support 20 and the front side is lifted, so that the turf unraveling device 8 is lifted and the turf surface cannot be unraveled. In this manner, the lawn unraveling device 8 can be moved to either the landing position or the lifting position by the driver's driving maneuvering.

  A vertical height position adjusting device 22 for adjusting the height position of the front side of the upper lid case 8 is fixed in front of the upper cover case 9. As shown in FIG. 3, the device 22 is supported by a vertically long support case 23 attached and fixed to the front end of the upper cover case 9, and is vertically guided so as to sandwich the support case 23. A roller support 25 provided with a roller 24 traveling on the lawn upper surface is provided. A screw rod 29 screwed into a female screw portion 27 fixed above the guide column 26 in the support case 23 and inserted into a rotation guide portion 28 fixed above the support case 23; In order to prevent loosening of the screw rod 29 by screwing the screw rod 29 between the upper and lower handle 30 fixed to the tip end of the screw rod 29 and between the upper and lower handle 30 and the rotation guide portion 28. The handle lock rod 31 is provided.

With this vertical height position adjusting device 22, the height position on the front side of the upper cover case 9 is adjusted by the rotation of the vertical handle 30, that is, the female screw portion 27 is guided by the forward / reverse rotation of the vertical handle 30. By moving up and down with respect to the support case 23 together with the support 26, the roller support 25 also moves up and down with respect to the vehicle body 3, so that the unwinding position between the tip of the unwinding rotating body 11 and the grass top surface is optimized. Set. At this time, the handle lock bar 31 is tightened so that the screw 24 is not loosened by the vibration caused by the roller 24 traveling on the lawn top surface.

Since the rear end side of the lawn unraveling device 8 is fixed with the mounted portion 16 of the lift arm 15 fixed to the vehicle body 3 and the mounting portion 17 of this device as described above, The height adjustment of the lawn unraveling device 8 is sufficient only by the height adjustment. If the roller 24 has a certain level of cushioning property, it is preferable because it can absorb small irregularities on the lawn top surface and less vibrations, and therefore a roller made of synthetic resin is suitable. In the drawing shown in FIG. 2, an example in which two vertical height position adjusting devices 22 are installed on both front sides of the upper cover case 9 is shown, but not limited to this, a wide roller 24 is provided in the center. There may be one thing or three or more narrow things.

An outrigger 32 is fixed to the rear of the upper cover case 9 in order to maintain stability when the lawn unraveling device 8 is removed from the lift arm 15. As shown in FIGS. 4 and 5, the outrigger 32 includes a guide tube 33 fixed to the upper cover case 9, a support column 34 that is housed in the guide tube 33 and moves up and down, and the support column 34. A base 35 supported on the ground, a locking rod 36 for stopping the stopper hole 33a of the guide tube 33 and the stopper hole 34a of the column 34 for height adjustment, and a stopper pin 37 for preventing removal are provided. Thus, when the turf unraveling device 8 is removed from the lift arm 15, the front of the turf unraveling device 8 is supported by the vertical height position adjusting device 22 and the rear is supported by the outrigger 32. The height position is adjusted and fixed by the stop rod 36. On the contrary, when fixing to the lift arm 15, adjustment is made with the locking rod 36 so as to shorten it because it interferes with traveling. This facilitates storage when the turf unraveling device 8 is not used in the operation of simply collecting the trash accumulated on the lawn surface.

The said loosening rotary body 11 is for rotating inside the upper cover case 9 and loosening on the lawn surface. As shown in FIG. 10, one end of the rotary shaft 12 protrudes to the outside of the side plate 10, and a drive shaft 40 that is rotationally driven by a rotary drive source 13 such as a sprocket 12a fixed to the protruding portion and a hydraulic motor. The sprocket 40a is wound around the chain 14 to drive the rotary shaft 12 to rotate. Members outside these side plates 10 are housed in the outer case 10a.

Further, as shown in FIG. 9, a plurality of mounting plates 38 are attached at equal intervals in the longitudinal direction of the outer periphery of the rotating shaft 12, and a large number of spring dynes 39 are directed to the mounting plate 38 with their tips directed outward. The root portion 39b of the spring portion 39a is fixed with screws. The locus of the tip of the spring dyne 39 is adjusted so as to be in contact with the lawn surface in the opening below the upper cover case 9. This adjustment is made to be kept at an optimum value by the vertical height adjusting device 22. The distance and position of the spring tine 39 attached to each mounting plate 38 in the lateral direction can be set differently, so that the lawn surface can be loosened evenly. The loosening rotary body 11 is not limited to this embodiment, and may have another structure.

A dust scattering prevention cover 41 made of a flexible member such as rubber is provided around the lower opening of the upper cover case 9, so that dust loosened by the loosening rotary body 11 can be removed. It is difficult to leak.

The case where the artificial lawn surface is cleaned using the lawn cleaning vehicle 1 having the above-described configuration will be described. As shown in FIG. 1, the vehicle travels while loosening the lawn surface with the lawn loosening device 8 attached, and travels while collecting the loosened dust into the rear hopper 4. At this time, the contact distance between the locus of the tip of the spring tine 39 of the unwinding rotating body 11 of the lawn unraveling device 8 and the lawn surface is optimized, that is, the position where the top surface of the lawn is unraveled most efficiently. The vertical handle 30 of the vertical height position adjusting device 22 is rotated forward and backward, and the hand lock bar 31 is tightened and fixed at a fixed position. After such a preparation is completed, the operator travels while turning the handle while turning the brush 6 while rotating the brush 6. As shown in FIG. 6, the dust that is loosened and appears on the surface from between the turf leaves is scraped up into the wind tunnel 7 by the brush 6 that rotates in the subsequent brush cover 5 and collected in the hopper 4. As a result, dust can be collected at the same time while loosening the surface of the lawn, thereby improving work efficiency.

If there is a concrete surface, gravel surface, etc. in the direction of travel of the lawn sweeper 1 during work, the tip of the spring tine 39 is damaged, so the operator gives a command to shrink the drive cylinder 21 and the lawn loosening device. Lift 8 with lift arm 15 to avoid contact. When resuming, the lawn loosening device 8 is lowered onto the lawn surface by the reverse operation.
In this way, it is possible to smoothly run while simultaneously relaxing and cleaning the lawn surface.

The turf unraveling device 8 can be attached to and detached from the lawn cleaning vehicle 1 only by lifting the lift arm 15 by loosening the bolt 18 and releasing the fixing of the mounted portion 16 and the mounting portion 17 and then shrinking the drive cylinder 21. good. The mounting is reversed, and it is simple because the lift arm 15 is lowered from above the bolt hole 17a of the mounting portion 17, the position of the hole of the mounted portion 16a is adjusted, and the bolt 18 is screwed.

  Since the lawn cleaning device of the present invention can be used for both artificial turf and natural turf, it can be widely used for cleaning various stadiums such as golf courses, baseball fields, and soccer fields.

1 Lawn sweeper
2 Pilot seat
3 body
4 Hopper 5 Brush cover
6 Brush 7 Wind tunnel 8 Turf unraveling device 9 Upper cover case 10 Side plate 11 Unraveling rotating body 12 Rotating shaft
13 Rotation drive source 14 Chain 15 Lift arm 16 Mounted portion 17 Mounted portion 18 Bolt 19 Handle 20 Shaft support 21 Drive cylinder 22 Vertical height position adjusting device 23 Support case 24 Roller 25 Roller support 26 Guide post 27 Female threaded portion 28 Rotation Guide portion 29 Screw rod 30 Vertical handle 31 Handle lock rod 32 Outrigger 33 Guide cylinder 34 Support rod 35 Substrate 36 Locking rod 37 Stop pin 38 Mounting plate 39 Spring tine 40 Drive shaft 41 Splash prevention cover

The invention according to claim 1 is a lawn surface that is scraped up by a brush that is driven to rotate within a brush cover that is provided below a central portion of a vehicle body that includes a cockpit at the front and a hopper at the rear loading platform. In the lawn cleaning vehicle that collects the upper dust in the hopper through the wind tunnel, a lawn unwinding device that loosens the top of the lawn where the turf leaves are hardened and fixed is fixed to the front lower part of the car body and separated from the top of the lawn. Dust is swept up with a brush at a rear position and collected in a hopper, and the lawn unwinding device comprises a unwinding rotating body that is supported by both side plates of an upper cover case so as to be rotatable, and the unwinding rotating body. A drive source for rotating the vehicle body and a mounting portion to the mounted portion of the vehicle body are provided in the upper cover case, and a spring tine spray serving as a tip of the unwinding rotating body is provided in front of the upper cover case of the lawn unraveling device. A vertical height position adjustment device capable of adjusting the height position of the upper cover case so that the contact point between the locus of the tip of the groove portion and the grass upper surface is in an appropriate position, and the vertical height position adjustment device is A support case fixed to the front of the case, a roller support in which a roller that runs on the lawn upper surface is rotatably provided, and a guide column fixed to the roller support to guide the support case in the vertical direction; A screw rod having a male screw threadedly engaged with a female screw portion fixed to a guide column in the support case, a vertical adjustment handle fixed to a protruding portion of the screw rod from the column case, and the vertical The lawn cleaning vehicle includes a handle lock screwed to a screw rod between the adjustment handle and the support case .

According to a second aspect of the present invention, the loosening rotator has a plurality of spring tine spring portions mounted on a mounting plate fixed along the outer circumference in the longitudinal direction of a rotating shaft rotatably supported at both ends by the both side plates. This is because the base of the spring portion is fixed so that the tip faces outward .

According to a third aspect of the present invention, the turf unraveling device is fixed to the front lower side of the vehicle body. The driving cylinder has one end fixed to the front side of the lift arm whose rear side is rotatably fixed to the lower front side of the vehicle body. The other end is fixed, and the attachment portion provided on the front end side of the lift arm whose front side moves in the vertical direction by the expansion and contraction of the drive cylinder and the attachment portion provided on the upper cover case are detachably fixed. It is in.

The invention according to claim 4 is that two of the vertical height position adjusting devices are installed on both sides of the front of the upper cover case .

The invention according to claim 5 is that an outrigger for stabilizing the posture of the lawn unraveling device is fixed to the rear of the upper cover case .

According to the invention of claim 1 , while traveling while loosening the turf surface that has been firmly treaded by the lawn loosening device provided in the lower front of the vehicle body, the brush provided in the lower center of the vehicle body is used to Of the dust that has been loosened and scraped onto the turf surface, the relatively light dust that has been lifted up by the rotational force of the brush is collected through the wind tunnel into the hopper provided in the loading platform. The turf unraveling device is housed in a state where the both ends of the turf unraveling device are rotatably supported on both side plates of the upper cover case, a driving source for rotating the unwinding rotator, By providing a mounting part to the vehicle body provided in the upper cover case, it is possible to simultaneously unravel and clean with a single cleaning car, obtain the unwinding width of the entire width of the vehicle, and independent Unscrew and rotate the rotating body Since progresses while, to improve the work efficiency. In addition, by providing a vertical height position adjustment device in front of the upper cover case, the degree of contact between the tip locus of the spring stein at the tip of the loosening rotary body and the lawn top surface is adjusted to obtain an optimum unwinding depth position. Further, the vertical height position adjusting device includes a support case fixed in front of an upper cover case, a roller support in which a roller running on the lawn upper surface is rotatably provided, and the support case. A guide column fixed to the roller support for guiding in the vertical direction; a screw rod formed on the outer periphery with a male screw threadedly engaged with a female screw portion fixed to the guide column in the support case; and the screw rod The upper and lower handles fixed to the protruding portion of the support case and the handle lock screwed to the screw rod between the upper and lower handles and the support case are provided. On can be easily adjusted height only rotate, by tightening the handle lock, never loosened even when vibrations traveling irregularities location on grass surface.

According to the invention of claim 2 , since the loosening rotary body is configured to face the tips of the spring portions of a large number of spring tines, the lawn surface can be loosened efficiently.

According to the invention of claim 3 , the turf unraveling device is provided with a lift arm mounting portion whose tip is movable up and down by a drive cylinder that is extendable in front of the vehicle body and a mounting portion provided with an upper cover of the turf unraveling device. Therefore, if the lift arm is lifted by operating the drive cylinder in a place where loosening is not required, the lawn unraveling device can be lifted from the lawn surface and run easily. Also, when simply cleaning a place that does not require loosening, simply remove the fixed part of the mounting part and the mounting part and store the lawn loosening device separately so that only the dust on the lawn surface can be collected. It can be done efficiently. In addition, fuel consumption can be reduced by the lighter the car.

According to the invention of claim 4 , since there are two vertical height adjusting devices on both sides in front of the upper cover case, it is possible to operate while supporting the front of the device more stably than in the case of one.

According to the invention of claim 5, the loosening device can be stably stored by the outrigger when not in use.

Claims (8)

Dust on the lawn surface that has been scraped up by a brush that rotates in a brush cover provided below the center of the vehicle body that has a cockpit in the front and a hopper in the rear loading platform is passed through the wind tunnel. In the lawn sweeper to collect in
A lawn cleaning vehicle that fixes a lawn unwinding device that loosens the upper surface of the lawn to the front lower side of the vehicle body, and collects dust separated from the upper surface of the lawn with a brush at a rear position and collected in a hopper.   The lawn unraveling device includes a unraveling rotating body that is rotatably supported on both side plates of an upper cover case, a drive source for rotating the unraveling rotating body, and an attachment to a mounting portion of the vehicle body. The lawn cleaning vehicle according to claim 1, wherein the portion is provided in the upper cover case.   The loosening rotator is spring-loaded so that the ends of the spring portions of a number of spring tines face outwards on a mounting plate fixed along the outer circumference in the longitudinal direction of a rotating shaft that is rotatably supported on both side plates. The root of the part is fixed.   The turf unraveling device is fixed to the front lower side of the vehicle body by fixing the other end of the drive cylinder whose one end is fixed to the vehicle body to the front side of the lift arm whose rear side is rotatably fixed to the front lower side of the vehicle body. The attachment part provided in the front end side of the said lift arm which the front side moves to an up-down direction by expansion / contraction of a cylinder, and the attachment part provided in the said upper cover case were detachably fixed. The lawn cleaning apparatus of any one of.   In front of the upper covering case of the lawn unraveling device, the height position of the upper covering case is such that the locus of the tip of the spring portion of the spring tine, which is the tip of the unwinding rotating body, and the contact point of the lawn upper surface are in an appropriate position. The lawn cleaning apparatus of any one of Claims 1 thru | or 4 provided with the up-and-down height position adjustment apparatus which can adjust.   The vertical height position adjusting device includes a support case fixed in front of an upper cover case, a roller support in which a roller running on the lawn top surface is rotatably provided, and the support case for vertically guiding the support case. A guide post fixed to the roller support, a screw rod formed on the outer periphery with a male screw threadedly engaged with a female screw fixed to the guide post in the support case, and a protrusion of the screw rod from the support case The lawn according to any one of claims 1 to 5, comprising a vertical adjustment handle fixed to the portion, and a handle lock screwed to a screw rod between the vertical adjustment handle and the support case. Cleaning device.   2. The lawn cleaning device according to claim 1, wherein two vertical height position adjusting devices are installed on both sides in front of the upper cover case.   The lawn cleaning device according to any one of claims 1 to 7, wherein an outrigger for stabilizing the posture of the lawn unraveling device is fixed to the rear of the upper cover case.

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