JP2012005403A - Riding type turf cleaning machine and method of collecting cores scattered on the turf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform core collecting work and simultaneously prevent the rise of soil around an aeration hole and the void of soil of the entire turf by allowing a ground contact roller to transfer a pressure on a turf during a work for collecting cores.SOLUTION: The riding type turf cleaning machine includes: a machine body 1 on which an operator OP rides and which is operated by the operator; a rotating brush unit U liftably mounted on the machine body 1 via a first hydraulic cylinder Sand sucking and collecting cores by scooping the cores remaining on the turf GS; and a dust collecting bucket B disposed on a rear surface of the rotating brush unit U and accommodating the cores sucked and collected by the rotating brush unit U at a work position. A rotating brush unit presser (first hydraulic cylinder S) is provided, for pressing the entire rotating brush unit U downward for acting a transfer pressure on a ground contact roller R, in a state where the rotating brush unit U is lowered relative to the machine body 1 and the ground contact roller R is rotated while in contact with the turf GS.

Description

The present invention has a rotary brush unit mounted on a machine body through a hydraulic cylinder so as to be movable up and down, and is used for sucking and collecting cores such as small lump-like cores and mowing lawn scattered on a lawn surface. The present invention relates to a type lawn surface cleaner and a method of collecting cores scattered on the surface of the lawn.
In this specification, although the term “rolling pressure” is frequently used, this “rolling pressure” means that when the grounding roller is pulled and rolled, the weight of the rotating brush unit is far exceeded. This means rolling while applying a large force to the grounding roller that can flatten the lawn surface. In general, the ground surface including the lawn surface is flattened by applying force to the soil surface. It is synonymous with meaning "crushing".
In this specification, the terms “rolling pressure” and “pressing force” are used, and “rolling pressure” refers to the force exerted on the grass surface by the rotating ground roller, and “pressing force”. The term “force” refers to the force that presses the ground roller from above due to its own weight of the rotating brush unit and the hydraulic pressure of the hydraulic cylinder, all of which are different in the application target of the force, and have the same size and direction.

  In a golf course turf, the cylindrical tine attached to the aeration machine is inserted into the turf (turf surface) and then removed, so that the distance between the front and rear and the left and right of the turf is approximately 60 mm. Many air holes are perforated to improve the air permeability and the like of the surface layer of the turf so that the lawn grows well. The vent hole has an inner diameter of 6 to 12 mm and a depth of 70 to 150 mm. Here, when an infinite number of air holes are formed in the turf by the tine, the cores (earth cores) that have come out of the tine are continuously dropped around the air holes and scattered as they are. The Further, when the tine is stabbed into the turf at the above interval and then removed, when the tine is removed, the periphery of the ventilation hole is greatly raised (see FIG. 15A), and the tine is pierced and removed. As a result, the surface portion of the turf surface is dug, so that the surface of the turf surface is softened and the surface of the turf surface becomes uneven due to unevenness. Furthermore, since the aeration machine is a passenger type and has a large weight, there is also unevenness caused by the stepping pressure of each wheel before and after the aeration machine.

  For this reason, after drilling innumerable ventilation holes in the turf with tine of the aeration machine, for example, using the riding lawn surface cleaner disclosed in Patent Document 1, The core that has been sucked and collected.

  The riding lawn surface cleaning machine includes a machine body that a driver rides and operates, and a grounding roller that is mounted on the machine body so as to be movable up and down via a hydraulic cylinder and that descends during work and contacts the grass surface. The rotating brush unit for scooping up and collecting the cores remaining on the lawn surface, and the connected state and the core discharging state by ascending can be selected on the back of the rotating brush unit. And a dust collection bucket that accommodates the cores sucked and collected by the rotating brush unit. When collecting the cores scattered on the turf, the rotating brush unit is lowered with respect to the airframe, and when the airframe is run with the grounding roller at the lower end thereof in contact with the turf, the rotating brush unit In the casing, the rotating brush and the suction airflow generated by the high-speed rotation of the blower blades are arranged on the lawn surface, the cores scattered on the lawn surface are sucked, and the rotating brush It is sent and collected in a dust collection bucket that is connected to the back side of the unit.

  In the above-described riding-type lawn surface cleaner, the grounding roller rolls on the lawn surface with the weight of the rotating brush unit acting on the grounding roller, but the weight of the rotating brush unit acts on the grounding roller. It is not possible to flatten without removing the soil swell and unevenness around the vent. For this reason, after collecting the core, run a compacting machine configured to pull a heavy compacting compaction roller on the rear part of the machine body on the turf, and apply the compacting roller to the lawn surface from which the core was collected, Correcting the unevenness, the entire lawn surface is leveled.

  In this way, the recovery of the core generated by drilling innumerable ventilation holes in the turf with tine, and the work to eliminate the soil swell and the unevenness of the lawn surface around the ventilation holes are separate tasks. Since it must be carried out by a machine (passenger type lawn surface cleaning machine and compaction machine), if a separate work machine is required, the total work time as a whole also becomes long. Furthermore, since the riding type lawn surface cleaner and the compactor, which are heavy with respect to the lawn surface, are run separately, the load on both the lawn and the lawn also increases.

JP 2000-209902 A

  In the riding lawn surface cleaning machine having the above-described configuration, the present invention recovers the core by applying pressure to the ground roller of the rotating brush unit to recover the core during the core recovery operation. At the same time as the collection operation, the object is to eliminate the rise of soil around the vent and the unevenness that occurs on the entire lawn surface, so that the entire lawn surface can be leveled.

  The invention according to claim 1 for solving the above-described problem is a machine body that a driver rides and operates, and is mounted on the machine body through a hydraulic cylinder so as to be movable up and down, and is lowered and lowered during work. A rotating roller unit for picking up and collecting the cores remaining on the lawn surface by suction, a working position on the back of the rotating brush unit, and the working position. And a dust collection bucket that is disposed so as to be capable of selecting a core discharge position on the upper side after the slant and accommodates the cores sucked and collected by the rotary brush unit at the work position. In order to apply a rolling force to the grounding roller in a state where the rotating brush unit is lowered with respect to the body and the grounding roller is in contact with the grass surface and rotating. It is characterized in that it comprises a rotary brush unit pressurizing means for pressurized toward the entire of the rotary brush unit downward.

  According to the first aspect of the present invention, in the state where the rotating brush unit is lowered with respect to the airframe and the grounding roller is in contact with the grass surface and rotating, the rotating brush unit pressurizing means is used to rotate the entire rotating brush unit. When the pressure is applied downward, the ground roller not only makes contact with the grass surface, but also rolls the grass surface with a large force far exceeding the weight of the rotating brush unit. Therefore, the pressure on each wheel of the aeration machine at the time of drilling the vent hole, which is the previous work, and the unevenness of the lawn surface caused by the pressure on each wheel of the lawn surface cleaning machine, at the time of core recovery, which is the main work, The rise of the surrounding soil is leveled by the rolling pressure of the grounding roller, and the lawn surface is rolled and leveled simultaneously with the recovery of the core. In other words, the cores scattered on the lawn surface are collected by the riding-type lawn surface cleaning machine without flattening the swell of the soil around the ventilation holes and the unevenness of the lawn surface by a dedicated compactor after the core is recovered. At the same time, the entire lawn surface can be flattened, the perimeter of the vents can be cleaned, and the entire lawn surface can be flattened.

  According to a second aspect of the present invention, in the first aspect of the invention, the rotating brush unit pressurizing means can switch between a state where a rolling force is applied to the ground roller and a state where the rolling force is not applied. It is characterized by being.

  According to the second aspect of the present invention, it is possible to select whether or not to apply the rolling force to the ground roller according to the state of the lawn surface in which the ventilation holes are perforated. Whether to perform or not can be freely selected. For example, in the case of collecting only the lawn grass scattered in the approach around the green of the golf course, it is not necessary to roll the lawn surface, so the rotary brush unit pressurizing means is turned off.

  According to a third aspect of the invention, in the first or second aspect of the invention, the hydraulic cylinder for raising and lowering the rotary brush unit also serves as the rotary brush unit pressurizing means, and the ground roller is in contact with the grass surface. Further, the present invention is characterized in that the rolling pressure of the ground roller is generated by the hydraulic pressure of the hydraulic cylinder.

  According to the invention of claim 3, even when the grounding roller is in contact with the ground, the use of the directional control valve capable of pressurizing the rotating brush unit downward allows the hydraulic brush to move up and down the rotating brush unit. A hydraulic cylinder that lifts and lowers the rotating brush unit by applying a pressure to the roller, that is, a rolling force of the ground roller, is also used as the rotating brush unit pressurizing means. Therefore, a dedicated pressurizing means for pressurizing the rotary brush unit downward can be made unnecessary, and there is no increase in the weight of the entire body of the lawn surface cleaner.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the grounding roller includes a pair of support brackets rotatably supported at lower ends of both side surfaces of the casing of the rotary brush unit. Grounding roller height adjusting means, which is rotatably supported by the free end portion in a towed state and adjusts the vertical position of the grounding roller with respect to the casing of the rotating brush unit, is paired with the left and right ends of the casing. A male threaded rod that is disposed on both sides of the upper end of the casing and that can be rotated by a handle that can be operated by a driver riding on the fuselage and that is vertically disposed, and a lower end that is a free end of the support bracket. The upper end of the male threaded rod is coupled to the male threaded rod. It is characterized in that the ring is configured to be in contact with the reaction force supporting portion fixed integrally.

  According to the invention of claim 4, the driver can adjust the vertical arrangement position of the grounding roller with respect to the casing by operating the handle in a posture facing diagonally right rear or diagonally left rear while on the aircraft. The adjustment becomes easy. Further, the reaction force of the rolling force exerted on the grass surface by the ground roller acts in a distributed manner on the ground roller height adjusting means and the connecting fulcrum portion of the support bracket, and constitutes the ground roller height adjusting means. Since the lower end of the connecting rod is connected to the free end of the support bracket to which the grounding roller is mounted, most of the reaction force of the rolling force exerted on the grass surface by the grounding roller is adjusted for the height of the grounding roller. The ratio of acting on the means and acting on the connecting fulcrum of the support bracket is reduced. As a result, there is a design restriction that the support rigidity of the connection fulcrum part of the support bracket cannot be increased so much. However, with the above configuration, the reaction force of a large rolling force exerted on the grass surface by the ground roller is effective under the restriction. Can be supported.

  The invention of claim 5 is a method for recovering the cores scattered on the lawn surface by perforating the air holes with tine, using the riding lawn surface cleaner according to any one of claims 1 to 4, While pressing the ground roller against the lawn surface by the operation of the rotating brush unit pressurizing means, the lawn surface core is sucked and collected by the rotary brush unit, thereby rolling the lawn surface by the ground roller, It is characterized in that the soil rises around the ventilation hole and the unevenness of the grass surface is eliminated and leveled flat.

  According to the invention of claim 5, the rotary brush unit pressurizing means is only provided for the existing riding lawn surface cleaner, and the soil around the vent hole is collected when the cores scattered on the lawn surface are collected. Eliminating the climax and unevenness of the lawn surface, the entire lawn surface can be leveled, eliminating the need for pressing the lawn surface using a dedicated compactor, which was previously essential. Thus, the recovery of the core and the management of the lawn surface related to the leveling of the lawn surface can be performed efficiently. In particular, when the riding-type lawn surface cleaner according to claim 3 is used, it is applied to the grounding roller only by changing the hydraulic circuit of the hydraulic cylinder for raising and lowering the rotary brush unit relative to the existing lawn surface cleaner. Since the pressure can be applied selectively, there is a unique advantage that the implementation cost can be reduced.

  According to the present invention, only the rotary brush unit pressurizing means is provided for the existing riding lawn surface cleaning machine, and when the cores scattered on the lawn surface are collected, the soil rises around the vent hole, It eliminates unevenness of the lawn surface, leveling the entire lawn surface flatly, eliminating the need for the compaction work on the lawn surface using a dedicated compacting machine, which has been essential in the past. Can be efficiently managed and the lawn surface management related to the leveling of the lawn surface.

It is a perspective view in the state where core C scattered on the lawn surface is collected by the riding type lawn surface cleaner according to the present invention. It is a right view of the riding-type lawn surface cleaning machine which concerns on this invention. It is a top view of the riding type lawn surface cleaning machine which concerns on this invention. It is a rear view of the riding-type lawn surface cleaner which mainly showed the rotating brush unit U. It is a right view of a riding type lawn surface cleaning machine in a state where the rotating brush unit U is raised. 3 is a perspective view of a rotating brush unit U. FIG. It is a right view of the riding-type lawn surface cleaning machine at the time of discharge | emission of the core C accommodated in the dust collection bucket B. FIG. FIG. 4 is a side view in which a part of a ground roller height adjusting means A for adjusting the height of the ground roller R with respect to the casing 12 of the rotating brush unit U is broken. It is a longitudinal cross-sectional view of the rotating brush unit U and the part of the dust collection bucket B. FIG. 4 is a diagram showing a drive mechanism of a rotating brush unit U. A first hydraulic cylinder S ₁ of the rod 15 protrudes, is a hydraulic circuit diagram of a state where the rotation brush unit U is rising. The first hydraulic cylinder S ₁ of the rod 15 protrudes to the maximum, a hydraulic circuit diagram of a state where the rotation brush unit U is stopped on the rising edge. FIG. 3 is a circuit diagram showing a state where the rod 15 of the first hydraulic cylinder S ₁ is retracted to the maximum and the lawn surface is rolled by the ground roller R. FIG. 3 is a hydraulic circuit diagram in a state where the rod 15 of the first hydraulic cylinder S ₁ is retracted to the maximum and no pressure is applied to the ground roller R. (A), (b) is an expanded sectional view of the part of the ventilation hole H before and behind collect | recovering the core C in which the grass surface GS is scattered. Supporting load applied to each wheel 2, 3a, 3b and grounding roller R when the riding lawn surface cleaner is moved (when not working), when rolling force is not applied to the grounding roller R, and when it is applied The measurement results are schematically displayed. It is the table | surface which showed the same content.

Hereinafter, the present invention will be described in more detail with reference to the best examples. First, the overall configuration of the riding-type lawn surface cleaner (hereinafter simply referred to as “lawn surface cleaner”) will be described, and then the rotary brush unit U, which is a characteristic part of the present invention, will be described in further detail. Explained. FIG. 1 is a perspective view of a state in which cores C scattered on a lawn surface are collected by a lawn surface cleaning machine according to the present invention, and FIGS. 2 and 3 are right side views of the lawn surface cleaning machine, respectively. 4 is a rear view of the lawn surface cleaning machine mainly showing the rotating brush unit U, and FIG. 5 is a right side view of the lawn surface cleaning machine with the rotating brush unit U raised. FIG. 6 is a perspective view of the rotating brush unit U. FIG. 1 to 4, the airframe 1 has a three-wheel structure including one front wheel 2 and a pair of left and right rear wheels 3 a and 3 b, and a hydraulic pump P ( The engine 5 which drives the said pump P is mounted. Body 1, a pair of rear wheels 3a provided on the machine body 1, 3b is driven to rotate by a hydraulic motor M _1, respectively, is configured to self-propelled.

A rotating brush unit U is mounted on the rear side of the driver's seat 4 in the fuselage 1 by a first link mechanism L ₁ and a first hydraulic cylinder S ₁ such that the rotating brush unit U can be moved up and down. Can be moved up and down by the second link mechanism L ₂ and the pair of left and right second hydraulic cylinders S ₂ and is mounted on the body 1. A pair of first struts 6 are erected in a slightly rearward posture at both ends in the width direction of the fuselage 1 behind the driver's seat 4 of the fuselage 1, and the pair of first struts 6. The connecting bar 7 is connected at a portion slightly above the central portion in the height direction, and the first struts 6 have their standing rigidity increased by the support arms 8 connected to the back side. It has a structure that can maintain a standing posture. Further, second and third support columns 9 and 11 are vertically provided in front of the first support column 6 in the airframe 1. The second and third support columns 9 and 11 are respectively attached to the upper side and the lower side of the machine body 1, and the second and third support columns 9 and 11 are further along the width direction of the machine body 1. Although they are attached at the same position, they are arranged slightly shifted along the front-rear direction of the body 1.

Further, as shown in FIGS. 5 and 6, the side plate portions 32 of the casing 12 of the rotating brush unit U, the upper end portion of the second support column 9, and the lower end portion of the third support column 11 are parallel links. In order to form a mechanism, the upper and lower links 13 and 14 of equal length are connected. A first hydraulic cylinder S ₁ that moves up and down the entire rotating brush unit U is disposed in front of the rotating brush unit U in the body 1 and in the center in the width direction. That is, the base end portion of the first hydraulic cylinder S ₁ is rotatably connected to the central lower portion of the horizontal member 28 constituting the airframe 1, and the tip end portion of the rod 15 is The rotating brush unit U is connected to a connecting bracket 16 provided at the front upper end of the central portion of the casing 12 in the width direction. Thus, the entry and exit of the first hydraulic cylinder S ₁ of the rod 15, the rotating brush unit U, while maintaining the arrangement attitude against the machine body 1, is elevated substantially vertically. Note that when the rotary brush unit U is lifted and lowered by the first link mechanism L ₁ which is a parallel link mechanism, the rotary brush unit U is slightly moved in the front-rear direction, but in order to minimize the fine movement. The connecting portions at both ends of the upper and lower links 13 and 14 constituting the first link mechanism L ₁ are connected between the working position that is the lower end of the rotating brush unit U and the non-working position that is the upper end. The line is designed to be horizontal.

Further, as will be described later, the lawn surface core C was sucked and collected in the casing 12 by the suction airflow generated by the rotation of the blower blades 37 constituting the rotary brush unit U, and was raised as it was in the casing 12. Later, it is collected in a dust collection bucket B arranged on the back side of the rotating brush unit U. In the working state, the dust collection bucket B is configured such that the discharge port 17 on the back side is closed by the lid body 24, the lower end portion close to the discharge port 17 on both side surfaces of the dust collection bucket B, and the first support columns. 6 are connected by two pairs of left and right links 18 and 19 arranged vertically. The front and rear positions of the connecting portions of the upper and lower links 18 and 19 with the side surfaces of the dust collection bucket B are substantially the same, and the vertical positions are different. The upper link 18 is slightly longer than the lower link 19, and the distance between the connecting portions of the upper and lower links 18, 19 with the first column 6 is that of the dust collection bucket B of each link 18, 19. It is wider than the distance between each connecting portion with the side surface. A portion near the connection portion between the first column 6 of each lower link 19, and a portion close to the base end portion of the first strut 6 in the body 1 are connected by the second hydraulic cylinder S _2. Therefore, as shown in FIG. 7, when the rod 21 of the second hydraulic cylinder S ₂ is projected at the work position where the dust collection bucket B is disposed on the back side of the rotary brush unit U, the dust collection bucket B is While being rotated slightly in the clockwise direction, the work position is raised to the upper core discharge position after obliquely, and the discharge port 17 is arranged at the core discharge position facing downward after obliquely.

Further, as shown in FIGS. 2 and 7, a lid 24 that closes the discharge port 17 is disposed at the discharge port 17 (see FIGS. 7 and 9) on the back surface of the dust collection bucket B, and Both side surfaces of the dust bucket B and both side surfaces of the lid body 24 constitute a third link mechanism L ₃ and are connected by two pairs of links 22 and 23 arranged vertically. That is, one end of each of the links 22 and 23 is located at the upper end of both side surfaces of the dust collection bucket B, slightly behind the center in the front-rear direction and lower in front of the part. The other end portions of the links 22 and 23 are connected to the upper end portions on both side surfaces of the lid body 24 and the center portion in the vertical direction, respectively. The upper link 22 is longer than the lower link 23, and a bracket 25 provided at the center in the width direction on the back surface of the dust collection bucket B and the upper end portion of the lid body 24 are the third hydraulic cylinder S _3. It is connected with. For this reason, when the rod 26 of the third hydraulic cylinder S ₃ is retracted in a state where the dust collection bucket B is raised to the core discharge position, the lid 24 is separated from the discharge port 17 of the dust collection bucket B. However, the core C accommodated in the dust collection bucket B can be discharged from the discharge port 17 by rotating counterclockwise. 2, 3, 5, and 7, OP indicates a driver who operates the aircraft 1 sitting in the driver's seat 4 of the aircraft 1, and 27 indicates a handle provided on the aircraft 1. Show.

  Next, the internal structure of the rotating brush unit U will be described with reference to FIGS. 2 to 6, 8 and 9. FIG. 8 is a side view in which a part of the grounding roller height adjusting means A for adjusting the height of the grounding roller R with respect to the casing 12 of the rotating brush unit U is broken, and FIG. 4 is a longitudinal sectional view of a portion of a bucket B. FIG. In the casing 12 of the rotary brush unit U, the front plate portion 30, the top plate portion 31, and the side plate portions 32 are integrally connected, but the back plate portion 33 is provided for facilitating cleaning of the casing 12. The lower surface is opened to form a suction port 34, and the upper end portion on the back surface is opened to form a communication port 35 with the dust collection bucket B disposed on the back side. ing. In the casing 12, the rotating brush 36 and the blower blade 37 are arranged slightly above and below each other obliquely upward, and the lower end portion of the rotating brush 36 protrudes from the suction port 34. The rotating brush 36 has a configuration in which a large number of brushes 41 are equally spaced in the circumferential direction via a brush mounting plate 39 and are continuously attached to the brush shaft 38 along the axial direction. The blower blade 37 has a configuration in which a plurality of blade plates 43 (three in the embodiment) are attached to the blade shaft 42 at equal intervals in the circumferential direction. In addition, as shown in FIG. 6, air current leaks from the connecting portion with the dust collection bucket B in the left and right vertical sides and the upper horizontal side of the rectangular communication port 35 of the casing 12. Airflow leakage prevention plates 45 and 46 to be prevented are provided so as to protrude to the back side. In addition, an airflow leakage prevention plate 47 that is bent toward the obliquely lower side is provided on the lateral side portion below the communication port 35 so that the airflow easily flows obliquely downward.

  Support brackets 50 that support the grounding roller R are rotatably supported via fulcrum pins 51 at the lower end portions of the side plate portions 32 of the casing 12 and close to the front plate portion 30. Thus, the ground roller R is rotatably supported at the free end of each support bracket 50. And the lower end part of the both-sides plate part 32 of the casing 12 and the part close | similar to the front-plate part 30 differ from the backplate part 33 separable with respect to the said both-sides board part 32, and both the side-plate parts 32 and front Since the plate portion 30 is integrally connected and has high rigidity, it is preferable to support the fulcrum pin 51 on the portion because high support rigidity can be secured. Further, the ground roller height adjusting means A for adjusting the height of the ground roller R with respect to the casing 12 is disposed at both ends of the ground roller R, and the lower end portion is a free end portion of the support bracket 50. A male screw portion 55 a is screwed into a connecting rod 53 integrally connected to the connecting rod 52, a reaction force support portion 54 provided integrally with the casing 12, and a female screw portion 53 a at the upper end of the connecting rod 53. And a male threaded rod 55 to be joined. The stepped portion 55b near the upper end of the male screw rod 55 is in contact with the lower surface of the reaction force support portion 54 via a thrust bearing 56, and protrudes upward from the reaction force support portion 54 of the male screw rod 55. The adjustment handle 57 is attached. The position of the pair of left and right adjustment handles 57 is based on the driver OP sitting in the driver's seat 4 of the fuselage 1 so that the driver OP can be operated by changing the posture at the position of the driver's seat 4. It is arranged diagonally right rear and diagonally left rear. Further, the entire male screw rod 55 and the upper end portion of the connecting rod 53 are covered with a protective cylinder 58, and the upper end portion of the connecting rod 53 is provided with a scale 59. Therefore, the protective cylinder 58 in the scale 59 is provided. By reading the lower end portion, the height of the ground roller R relative to the casing 12 can be read. Further, a protruding portion 61 protruding upward is provided in a portion near the free end portion of the support bracket 50, and an arc hole 62 centering on the fulcrum of the support bracket 50 is formed in the protruding portion 61. A restriction pin 63 provided on the side plate portion 32 of the casing 12 is inserted into the arc hole 62. In order to adjust the height of the grounding roller R, when the support bracket 50 rotates upward or downward about the fulcrum pin 51, the restriction pin 63 comes into contact with the upper and lower formation ends of the arc hole 62. The arrangement positions of the ground roller R above and below the casing 12 are restricted.

  When the height of the ground roller R with respect to the casing 12 is to be adjusted according to the collection objects scattered on the lawn surface, the driver OP sitting in the driver's seat 4 on the fuselage 1 By rotating the adjustment handle 57 of each grounding roller height adjusting means A in a predetermined direction in a posture facing diagonally left rear, the sum of the lengths of the connecting rod 53 and the male screw rod 55 is changed. The height of the ground roller R with respect to the casing 12 is adjusted. Since this adjustment can be performed in a posture in which the driver OP is still on the body 1 without using a tool, the adjustment is easy. Further, as will be described later, when the lawn surface is rolled by the ground roller R, the reaction force of the rolling force acts on the reaction force support portion 54 and the fulcrum pin 51 in a distributed manner. Since the horizontal length between the ground roller R and the ground roller R is much shorter than the horizontal length between the ground roller R and the fulcrum pin 51, most of the reaction force is The ratio of acting on the reaction force support portion 54 and acting on the fulcrum pin 51 can be significantly reduced. With this design, it is possible to cope with the limitation in increasing the support rigidity of the fulcrum pin 51 portion. In order to restrict the rising end and the falling end of the ground roller R, the restriction pin 63 inserted into the arc hole 62 of the support bracket 50 is formed into a bolt structure, and the restriction pin 63 and nut (not shown) of the bolt structure. ), A part of the reaction force of the rolling force exerted on the lawn surface by the ground roller R can be applied to the portion of the regulation pin 63, so that the reaction force acting on the fulcrum pin 51 is further reduced. There are advantages you can do.

Next, with reference to FIG.9 and FIG.10, the drive mechanism of the rotating brush 36 and the ventilation blade 37 is demonstrated easily. A pulley 65 is attached to one end of the blade shaft 42, and a hydraulic motor M ₂ is directly connected to the other end. The pulley 65 and a pulley 66 attached to one end of the brush shaft 38 are connected to the pulley 65. the belt 67 is hung by the driving force of the hydraulic motor M _2, the rotary brush 36 and the blower blades 37 are rotated in the same direction. In FIG. 10, reference numeral 68 denotes a cover that covers a belt transmission mechanism including pulleys 65 and 66 and a belt 67.

The present invention applies a downward pressing force to the rotating brush unit U that is mounted so as to be able to move up and down with respect to the airframe 1, and when the cores C scattered on the lawn surface are collected, There is a feature in that the rise of the soil and the unevenness mainly caused by the pressure of the wheels of the aerating machine of the previous work are eliminated at the same time, and it is leveled flat on the lawn surface. What is realized is a hydraulic circuit of the first hydraulic cylinder S ₁ that raises and lowers the rotating brush unit U. In this hydraulic circuit, the directional control valve V ₁ and the pressure applied to the grounding roller R are turned on and off. A switching valve V ₂ to be turned off is used. As shown in FIGS. 2 and 3, on the left side of the driver's seat 4 of the airframe 1, in addition to the direction control valve V ₁ and the switching valve V ₂ , a second hydraulic cylinder S that moves the dust collection bucket B up and down. ₂ and direction control valves V ₃ and V ₄ for controlling the third hydraulic cylinder S ₃ for opening and closing the lid 24 of the dust collection bucket B, and the hydraulic motor M ₂ for driving the brush shaft 38 and the blade shaft 42. valve V ₅ are mounted, each valve V ₁ ~V ₅ is respectively provided with a lever K ₁ ~K ₅ for manual operation.

Next, with reference to FIGS. 11 to 14, the first hydraulic oil pressure circuit of the cylinder S ₁ for elevating the rotating brush unit U will be described. FIG. 11 shows a state in which the rod 15 of the first hydraulic cylinder S ₁ protrudes and the rotating brush unit U rises, and FIG. 12 shows that the rod 15 of the first hydraulic cylinder S ₁ protrudes to the maximum and rotates. shows a state where the brush unit U is stopped on the rising edge, 13, recessed first hydraulic cylinder S ₁ of the rod 15 is maximized, shows a state in which pressure rolling the lawn surface by the ground roller R, FIG. Reference numeral 14 denotes a state in which the rod 15 of the first hydraulic cylinder S ₁ is retracted to the maximum and no pressure is applied to the ground roller R. The pressure oil discharged from the hydraulic pump P is divided by a flow dividing valve 71 into a pipe 72 reaching the direction control valve V ₁ and a pipe 73 leading to the upper chamber S ₁ a of the first hydraulic cylinder S ₁ through the switching valve V ₂ . To be diverted to The pressure of the pressure oil that passes through the direction control valve V ₁ to the lower chamber S ₁ b of the first hydraulic cylinder S ₁ is controlled by the pressure control valve 74 and branched by the flow dividing valve 71, so that the first hydraulic cylinder the pressure of the hydraulic fluid leading to the upper chamber S ₁ a of S ₁ is controlled by the pressure control valve 75. In the figure, 76 indicates a pressure gauge that displays the pressure of the pressure oil flowing into the direction control valve V ₁ .

In the state shown in FIG. 11, the switching valve V ₂ is selected to be in the “ON” state (the state in which the upper chamber S ₁ a of the first hydraulic cylinder S ₁ can hold the pressure), and the hydraulic pump The pressure oil discharged from P flows into the lower chamber S ₁ b of the first hydraulic cylinder S ₁ through the diverter valve 71, the pipe line 72 and the direction control valve V ₁ , and the diverter valve 71 and the pipe line 72. And the switching valve V ₂ leads to the upper chamber S ₁ a of the first hydraulic cylinder S ₁ . Control pressure of the pressure control valve 74 (P _1), since is set larger than the control pressure of the pressure control valve 75 (P _2), the pressure P ₁ in the lower chamber S ₁ b of the first hydraulic cylinder S ₁ As the pressure oil flows in, the upper chamber S ₁ a of the first hydraulic cylinder S ₁ maintains the pressure P ₂ while surplus pressure oil flows into the tank T. As a result, the rod 15 of the first hydraulic cylinder S ₁ protrudes to the maximum, and the directional control valve V ₁ is disposed at the neutral position with the rotary brush unit U reaching the rising end, as shown in FIG. as such, conduit 77 leading to the lower chamber S ₁ b of the first hydraulic cylinder S _1, as well blocked by the directional control valve V _1, the upper chamber S ₁ a of the first hydraulic cylinder S _1, the pressure P _{The second} pressure oil continues to act, and the rotating brush unit U stops in a state of being fixed at the non-working position that is the rising end position.

Then, in the state where the grass surface GS is rolled by the ground roller R, when collecting the cores C scattered on the grass surface GS, as shown in FIG. The directional control valve V 2 is brought into a state in which the pressure oil diverted by the diversion valve 71 does not flow into the lower chamber S ₁ b of the first hydraulic cylinder S ₁ but flows into the tank T while the switching valve V ₂ is left “ON” Switch ₁ As a result, the pressure oil divided by the diversion valve 71 passes through the conduit 73 to the upper chamber S ₁ a of the first hydraulic cylinder S ₁ and maintains the pressure (P ₂ ) set by the pressure control valve 75. . As a result, the grounding roller R that is in contact with the grass surface GS pressurizes the grass surface GS with a support load (rolling pressure) W ₃ corresponding to the pressure (P ₂ ) set by the pressure control valve 75. The lawn surface GS is rolled. By adjusting the set pressure (P ₂ ) with the pressure control valve 75, the rolling pressure of the ground roller R can be adjusted.

On the other hand, when the grounding roller R is used as the original grounding roller R without pressurizing, the pressure oil diverted by the diversion valve 71 is obtained when the rotating brush unit U is fixed at the non-working position. The switching valve V ₂ is switched to “OFF” so as to be shut off at the switching valve V ₂ , and the pressure oil divided by the flow dividing valve 71 is in the lower chamber S ₁ b of the first hydraulic cylinder S _1. The direction control valve V ₁ is switched to a state of flowing into the tank T without flowing into Thus, the rotating brush unit U is lowered by its own weight while discharging the oil in the lower chamber S ₁ b of the first hydraulic cylinder S ₁ to the tank T, and the ground roller R is not subjected to an applied pressure. In the state, it is grounded to the grass surface GS. The other second and third hydraulic cylinders S ₂ and S ₃ and the hydraulic motors M ₁ and M ₂ are operated by the hydraulic pump P shown in FIGS.

In the hydraulic circuit diagram shown in FIGS. 11 to 14, the pressure oil in the same hydraulic pump P diverted by diverter valve 71, pressure oil is the first hydraulic cylinder S ₁ of the upper chamber S ₁ a Although acting, it is also possible to adopt a configuration in which pressure oil is applied to the upper chamber S ₁ a by a pump different from the hydraulic pump P.

Next, referring to FIGS. 1, 2, 9 and 15, the core C scattered on the lawn surface GS is collected while the lawn surface GS is pressed by the ground roller R of the rotating brush unit U. The work will be described. 15A and 15B are enlarged cross-sectional views of a portion of the vent hole H before and after collecting the core C on which the lawn surface GS is scattered. In addition, in FIG. 1, a state in which an infinite number of air holes H are drilled in the grass surface GS is shown, but the pitch and the horizontal interval of the air holes H are both ignored and illustrated. Actually, the pitch of the air holes H and the interval in the horizontal direction are both smaller than shown. As described above, in a state where the rotation brush unit U is placed in the non-working position is upper end, the switching valve V ₂ while the "ON", the lever K ₁ of the directional control valve V ₁ When the rotary brush unit U is lowered, for the reason described above, the ground roller R grounded to the grass surface GS is applied with pressure (W ₃ ) corresponding to the set pressure (P ₂ ) of the pressure control valve 75. Works. The applied pressure (W ₃ ) is the same as the support load (W ₃ ) of the ground roller R. The position in the height direction of the ground roller R with respect to the casing 12 of the rotary brush unit U, in other words, in the state where the ground roller R is grounded to the grass surface GS, the vertical position of the rotary brush 36 with respect to the grass surface GS is The adjustment is made by the rotation of the adjustment handle 57 of the grounding roller height adjusting means A.

  In the above state, when the airframe 1 is advanced by the operation of the driver OP who has entered the airframe 1, the core C scattered on the lawn surface GS causes the suction airflow generated by the rotation of the blower blades 37 to be absorbed by the bottom surface of the casing 12. Therefore, the core C scooped up from the grass surface GS by the rotation of the rotary brush 36 is scooped up obliquely upward along the front plate portion 30 of the casing 12 and remains as it is. It rides in the air current and is sent into the dust collection bucket B from the portion of the communication port 35 of the casing 12. In the dust collection bucket B, the core C is dropped and accommodated at the bottom of the dust collection bucket B, and the air flow generated by the rotation of the blower blades 37 is collected in the dust collection bucket B. The airflow in the bucket B acts so as to be expelled to the outside, and the airflow flows from the upper end of the hollow lid 24 toward the opening at the lower end, and is discharged to the outside.

On the other hand, the grounding roller R that determines the arrangement position of the rotary brush 36 in the vertical direction with respect to the lawn surface GS has substantially the same length as the working width E (see FIG. 2) of the rotary brush 36, and the lawn surface GS. In order to roll while pressing with a pressure W _3, it has a function as a rolling roller that rolls the lawn surface GS and leveles it flat. For this reason, as shown in FIG. 15, an aeration machine is used to swell the soil 81 formed in the periphery of the vent hole H (see FIG. 15A) and the immediately preceding vent hole H. The uneven pressure formed on the lawn surface GS is leveled by the step pressure of the wheels and the step pressure of the front wheel 2 of the lawn surface cleaner during core recovery, and the lawn surface GS becomes flat. That is, the lawn surface GS is flattened simultaneously with the recovery of the cores C scattered on the lawn surface GS. Therefore, it is not necessary to level the lawn surface GS flat by a dedicated compactor later. In FIG. 1, BL indicates a boundary line between a portion where the operations of the recovery of the core C and the rolling pressure of the grass surface GS are completed and an unworked portion. In FIG. Show.

As described above, when the grounding roller R receives the pressure W ₃ and rolls while exerting a force exceeding its own weight on the lawn surface GS, the supporting load of the grounding roller R out of the total load of the body 1 As a result, it means that all the supporting loads of the three wheels, that is, the front wheel 2 and the pair of left and right rear wheels 3a and 3b are all reduced. By reducing the support loads of the three wheels in total, the stepping pressure of each wheel is reduced, and the degree of unevenness that occurs on the lawn surface GS due to the running of the lawn surface cleaner is also reduced. It can be said that this phenomenon also contributes to flattening the grass surface GS by the rolling pressure of the ground roller R.

Then, if the allowed pressure rolling ground roller R by the first hydraulic cylinder S _1, 3 pieces of each wheel 2,3a fuselage 1, by way of specific numerical values that support load of 3b is reduced confirmed To do. FIG. 16 shows that when the lawn surface cleaner is moved (during non-working), when the rolling force is not applied to the grounding roller R, and when it is applied, each wheel 2, 3a, 3b and the grounding roller R are applied. The measurement results of the support load are schematically displayed, and FIG. 17 is a table showing the same contents. The test method is performed by placing each wheel 2, 3a, 3b of the lawn surface cleaner on a weighing scale, and the supporting load of the ground roller R is the total load of the lawn surface cleaner from the total weight of the lawn surface cleaner. Calculated by subtracting the sum. The above-described measurement of the support load was performed in a state in which a driver weighing 60 kg was boarded on the body 1. Further, when working without rolling, the support load of the ground roller R is equal to the weight of the rotating brush unit U.

As shown in FIGS. 2, 16 and 17, when the total weight (mass) of the lawn surface cleaner including the driver's weight (60 kg) is 814 kg, the first hydraulic cylinder S ₁ causes the ground roller R to When the rolling force was applied to the roller, the supporting load of the grounding roller R, that is, the pressing force (rolling pressure) of the grounding roller R increased from 1118N to 2020N, and the increase amount was 902N. As a result, the support load of each of the left and right rear wheels 3a and 3b was alleviated by about 387N, and the support load of the front wheel 2 was alleviated by about 88N. The reduction amount of the support load of each rear wheel 3a, 3b is much larger than the reduction amount of the support load of the front wheel 2 because the ground roller R is disposed immediately before the pair of left and right rear wheels 3a, 3b. Based on placement reasons. One of the left and right rear wheels 3a, 3b is forced to travel on the grass surface GS after the core C has been collected and rolled by the grounding roller R. As a result, after the rolling by the grounding roller R, Considering that the grass surface GS is stepped on by the one rear wheel 3a, 3b, the technical significance of the large reduction in the support load of the pair of left and right rear wheels 3a, 3b is great. 2 and 17, W ₁ , W ₂₁ , and W ₂₂ indicate support loads for the front wheel 2, the left rear wheel 3a, and the right rear wheel 3b, respectively.

Thus, by pressing the rotating brush unit U downward by the hydraulic pressure of the first hydraulic cylinder S ₁ , the supporting load on the ground roller R, that is, the pressure applied to the ground roller R, is greatly increased, and the ground roller R It can be numerically understood that the lawn surface GS is leveled by a large rolling force. Here, the value of the pressing force (rolling pressure) of the grounding roller R is merely an example, and as described above, the set pressure of the pressure control valve 75 incorporated in the hydraulic circuit of the first hydraulic cylinder S _1. Since the pressure (rolling pressure) of the grounding roller R can be adjusted by adjusting (P ₂ ), the pressure (rolling pressure) of the grounding roller R can be increased from the above value by increasing the set pressure (P ₂ ). It is also possible to make the supporting loads W ₁ , W ₂₁ and W ₂₂ of the front wheel 2, the left rear wheel 3a and the right rear wheel 3b smaller than the above values.

Further, the above-described operation by the lawn surface cleaning machine according to the present invention collects the core C scattered on the lawn surface GS, while the uneven surface of the lawn surface GS and the soil swell around the vent hole H. 81 is leveled and flattened. However, for example, in the case of collecting the mowed grass scattered in the approach around the green of the golf course, or in the case of only collecting mowed grass or garbage even in the case of the green, the first hydraulic cylinder S by operating the lever K ₂ of the switching valve V ₂ that constitute _one of the hydraulic circuit, the hydraulic oil passes through the switching valve V ₂ to flow to the tank T, the rotation brush unit U, a large rolling pressure No longer acts, and only the own weight of the rotating brush unit U acts on the grounding roller R, and the above-described collecting work such as the cut grass can be performed.

In the above embodiment, by improving the hydraulic circuit diagram of a first hydraulic cylinder S ₁ for raising and lowering the rotary brush unit U, by generating pressure for pressurizing the rotation brush unit U below, rotation of the ground roller R Since the pressure is greatly increased, the first hydraulic cylinder S ₁ that raises and lowers the rotating brush unit U also has a function of increasing the rolling force of the ground roller R. For this reason, there is an advantage that a dedicated pressurizing means can be made unnecessary and the weight of the entire machine body is not increased. However, it is possible to design a dedicated hydraulic cylinder for pressurizing the rotating brush unit U downward. is there.

In the above embodiment, a “pressing force” is generated in the first hydraulic cylinder S ₁ to pressurize the rotating brush unit U from above to increase the rolling force of the ground roller R. The means for pressurizing the unit U downward is not limited to the hydraulic pressure of the hydraulic cylinder. For example, a spring means using a compression spring that biases the entire rotating brush unit U downward may be arranged above the rotating brush unit U so that the biasing force of the spring means can be cut off. . An example of a mechanism that can block the urging force of the spring means is that the entire spring means can be slid upward.

A: Ground roller height adjusting means B: Dust collection bucket C: Core GS: Lawn surface OP: Driver R: Ground roller S ₁ : First hydraulic cylinder (rotating brush unit pressurizing means)
U: Rotating brush unit W ₁ : Front wheel support load W ₂₁ : Left rear wheel support load W ₂₂ : Right rear wheel support load W ₃ : Ground roller support load (pressure applied to the ground roller or rolling force of the ground roller) )
1: Airframe 2: Front wheel 3a: Left rear wheel 3b: Right rear wheel 12: Rotating brush unit casing 50: Support bracket 51: Support point pin 53: Connecting rod 54: Reaction force support portion 55: Male screw rod 57: Adjustment handle

Claims (5)

A fuselage operated by the driver,
Attached to the airframe via a hydraulic cylinder so that it can be raised and lowered, and a grounding roller that descends during work and contacts the grass surface is provided, and the cores remaining on the grass surface are scooped up and collected by suction. A rotating brush unit for
A core that is arranged so that a work position on the back surface of the rotary brush unit and a core discharge position that is obliquely upward with respect to the work position can be selected and sucked and collected by the rotary brush unit at the work position A lawn surface cleaning machine with a dust collecting bucket for storing
In a state where the rotating brush unit is lowered with respect to the airframe and the grounding roller is in contact with the grass surface and rotating, the entire rotating brush unit is moved downward to apply a rolling force to the grounding roller. A riding-type lawn surface cleaning machine comprising a rotating brush unit pressurizing unit that pressurizes the unit toward the surface.   2. The riding mold according to claim 1, wherein the rotating brush unit pressurizing unit is capable of switching between a state in which a rolling force is applied to the ground roller and a state in which the rolling force is not applied. 3. Lawn surface cleaner.   The hydraulic cylinder for raising and lowering the rotary brush unit also serves as the rotary brush unit pressurizing means, and generates the rolling force of the ground roller by the hydraulic pressure of the hydraulic cylinder while the ground roller is in contact with the grass surface. The riding-type lawn surface cleaning machine according to claim 1 or 2, wherein the riding-type lawn surface cleaning machine is configured to be used. The grounding roller is rotatably supported in a towed state at the free ends of a pair of support brackets rotatably supported at lower ends of both side surfaces of the casing of the rotating brush unit,
A pair of grounding roller height adjusting means for adjusting the vertical position of the grounding roller with respect to the casing of the rotating brush unit is disposed at both left and right ends of the casing, A male threaded rod that can be rotated by a handle that can be operated by a driver boarding the vehicle, and a lower end is connected to a free end of the support bracket, and an upper end is screwed to the male threaded rod. Consisting of connecting rods,
The riding lawn surface according to any one of claims 1 to 3, wherein the stepped portion at the upper end of the male screw rod is configured to abut against a reaction force support portion integrally fixed to the casing. Cleaning machine. A method for recovering cores scattered on a lawn surface by drilling a vent hole with a tine using the riding lawn surface cleaner according to any one of claims 1 to 4,
While pressing the ground roller against the lawn surface by the operation of the rotating brush unit pressurizing means, the lawn surface core is sucked and collected by the rotary brush unit, thereby rolling the lawn surface by the ground roller, A method for recovering cores scattered on a lawn surface, characterized in that the soil rises around the vent hole and the unevenness of the lawn surface is eliminated and leveled flat.

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