JP6638055B1 - Grass cleaning brush height adjustment structure - Google Patents

Abstract

The present invention provides a brush height adjusting structure that can easily adjust the height of a brush with a simple configuration without an operator getting off a driver's seat of a lawn cleaning car. A brush height adjusting structure (1) is applied to a lawn cleaning vehicle that lifts and cleans dust with a brush member that is driven to rotate inside a hollow brush case (13). Elevating and lowering means 23 for vertically moving the brush case 13 movably provided, and regulating means for restricting movement of the brush case 13 below a set position when the brush case 13 is moved downward by the elevating means 23 24. The elevating means 23 can be operated from the driver's seat of the lawn cleaning truck. The regulating means 24 has a lever 54 operable from the driver's seat to set the set position, a holding mechanism 55 for holding the brush case 13 at the set position set by the lever 54, and a holding portion 68 for the lever 54. are doing. [Selection diagram] FIG.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush height adjusting structure for a lawn cleaning vehicle for cleaning a lawn surface such as a golf course, a lawn curing area or a park.

  The present applicant has previously proposed a brush height adjusting device for a lawn cleaning vehicle disclosed in Patent Document 1 below. This brush height adjusting device is applied to a lawn cleaning truck that collects dust on a lawn surface, which is swept up by a brush rotatably driven in a brush case provided on a vehicle body, in a hopper. Specifically, the brush height adjusting device includes a mounting plate having a side plate fixed to the side of the vehicle body on the upper side on both sides of the brush case of the vehicle body, a mounting frame including a horizontal plate fixed to the side plate at right angles, and formed on the horizontal plate. Guide cylinder fixed below the through-hole, a support rod housed vertically inside the guide cylinder, and a stop roller fixed to a brush case provided at a position of the support rod projecting below the guide cylinder. A mounting table, a ring-shaped spacer having a predetermined thickness, which is externally fitted to a required number of protrusions protruding above the horizontal plate of the support rod, and a lock pin inserted into a pin hole provided in the support rod. Is provided.

  Therefore, when adjusting the distance between the brush and the ground, first, with the lock pin removed from the support rod, fit the number of spacers corresponding to the required distance to the support rod, and then lock it. Insert the pin into the support rod. Then, by lowering the brush case and mounting the stop roller fixed to the brush case on the mounting table provided on the support rod, the brush and the ground are maintained at a predetermined distance, and the brush case is maintained. Is held. Since the distance between the brush and the ground is determined by the degree of protrusion of the protruding portion of the support rod from the horizontal plate, the degree of protrusion may be adjusted by increasing or decreasing the number of spacers fitted to the support rod.

Japanese Patent No. 6051372

  However, in the conventional case, since the brush height adjusting devices are provided on both sides of the brush case of the vehicle body, it is necessary for the operator to get off the cockpit and operate the brush height adjusting devices on both sides of the vehicle body. is there. Therefore, for example, when cleaning a lawn surface of a golf course with a lawn sweeper equipped with this brush height adjusting device, each time the worker moves from the fairway to the rough or from the rough to the fairway, the worker must You must get off the cockpit and operate the two brush height adjustment devices. In addition, in the conventional case, when adjusting the distance between the brush and the ground, the operator himself has to perform the work of attaching a spacer to the support rod and removing the spacer from the support rod. As described above, in the conventional apparatus, since it takes time and effort to adjust the height of the brush, there is room for improvement in operability.

  The present invention has been made in view of such a problem, and a main object of the present invention is to easily adjust the height of a brush with a simple configuration without an operator getting off a driver's seat of a lawn cleaning car. It is an object of the present invention to provide a brush height adjusting structure capable of performing the above-mentioned operations.

In order to achieve the above object, the brush height adjusting structure of the lawn cleaning vehicle according to the present invention is configured such that dust is scraped up by a brush member that is rotationally driven in a hollow interior, and the dust is taken into the interior from an inlet provided below. A brush height adjusting structure for a brush case of a lawn cleaning car provided below a cleaning car body so that a brush case discharged from a discharge port provided above is vertically movable, and operated from a driver seat of the lawn cleaning car. Lifting means for vertically moving the brush case, and means for restricting the brush case from moving below a set position when the brush case is moved downward by the lifting means, from the driver's seat. a lever for setting the operable said set position, the regulating means having a holding mechanism for holding the brush case in the set position set by the lever The lifting means includes a shaft portion that is supported by the cleaning car main body, a first end portion fixed to one axial end portion of the shaft portion, and the other end portion is provided on one side wall of the brush case. A piece, a second piece having one end fixed to the other axial end of the shaft portion and the other end provided on the other side wall of the brush case, and rotating the shaft portion around its axis. Driving means for causing the brush case to hold the brush case at the set position by restricting rotation of the shaft portion in a direction in which the brush case moves downward. I do.

  Also, in the brush height adjusting structure for a lawn cleaning vehicle according to the present invention, the regulating means may include an engaged portion with which the engaging portion of the lever can be engaged, and the engaging portion may be engaged with the engaged portion. A lever configured to hold the lever in a state where the setting position is set, the holding portion including a plurality of the engaged portions; The set position is changed by changing the engaged portion with which the is engaged.

  Further, in the brush height adjusting structure for a lawn cleaning vehicle according to the present invention, the holding mechanism may further include a shaft member provided on the cleaning vehicle body rotatably by operation of the lever, and a second member fixed to the shaft member. One fixing piece, a second fixing piece fixed to the shaft, and a rod having one end provided on the first fixing piece and the other end provided on the second fixing piece, An arc-shaped pin hole is formed on the two fixed pieces along a circumference centered on the axis of the shaft part, and the rod is provided with one end rotatably on the first fixed piece. The other end of the rod is engaged with the pin hole of the second fixing piece, and when the shaft rotates in a direction in which the brush case moves downward, the other end of the rod is fixed to the pin. The rotation of the shaft is restricted by contacting one end in the circumferential direction of the hole.

  ADVANTAGE OF THE INVENTION According to the brush height adjustment structure of the lawn cleaning vehicle which concerns on this invention, when moving a brush case downward by the raising / lowering means operable from a driver's seat, it restricts that a brush case moves below a set position. Regulation means. The regulating means has a lever operable from the driver's seat to set a set position, and a holding mechanism for holding the brush case at the set position. Therefore, the set position is set by operating the lever from the driver's seat, and the brush case provided with the brush member can be held by the holding mechanism at the set position.

  Further, according to the brush height adjusting structure of the lawn cleaning vehicle according to the present invention, the regulating means is a holding portion of the lever, and a plurality of engaged portions with which the engaging portion of the lever can be engaged are formed. It has a holding part. In this brush height adjusting structure, the set position at which the brush case is held is changed by changing the engaged portion with which the engaging portion engages. Therefore, the set position can be easily changed, and the lever can be held so as not to move unexpectedly.

  Further, according to the brush height adjusting structure of the lawn cleaning vehicle according to the present invention, the shaft portion and the brush case, which are supported by the cleaning vehicle body, are connected via the first piece and the second piece, and the shaft portion is By rotating around the axis, the brush case is moved up and down. In this brush height adjustment structure, the rotation of the shaft is regulated by the holding mechanism, so that the brush case is held at the set position. Therefore, the configuration can be simplified as compared with the conventional case where the brush case is held and the height is adjusted at two places.

  Further, according to the brush height adjusting structure of the lawn cleaning vehicle according to the present invention, the rod is rotatably provided on the first fixing piece having one end fixed to the shaft member, while the other end is formed on the shaft portion. Is engaged with the arc-shaped pin hole of the second fixing piece fixed to the second fixing piece. In this brush height adjusting structure, the rod is positioned by the lever, and the set position is set. In this state, when the shaft rotates around the axis, the other end of the rod moves in the circumferential direction of the pin hole. By contacting the one end, the rotation of the shaft is regulated. Therefore, the brush case can be held by a simple mechanical mechanism that can be operated from the driver's seat.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic side view which shows an example of the lawn cleaning vehicle provided with one Example of the brush height adjustment structure of this invention. FIG. 2 is a schematic perspective view showing a brush height adjusting structure provided in the lawn cleaning vehicle of FIG. 1, showing a state viewed from the front. It is the A section enlarged view in FIG. FIG. 3 is an enlarged view of a portion B in FIG. 2. It is a schematic plan view which shows the brush height adjustment structure with which the lawn cleaning vehicle of FIG. 1 is provided. It is the C section enlarged view in FIG. It is a D section enlarged view in FIG. It is the schematic perspective view which expands and shows some brush height adjustment structures with which the lawn cleaning vehicle of FIG. 1 is provided, and has shown the state seen from back. FIG. 2 is a schematic side view in which a part of a brush height adjustment structure provided in the lawn cleaning vehicle in FIG. 1 is omitted, and shows a state where a brush case is lifted in a certain setting position. FIG. 10 is a schematic side view in which a part of a brush height adjusting structure provided in the lawn cleaning vehicle of FIG. 1 is omitted, and shows a state where a brush case is lowered from the state of FIG. 9. FIG. 10 is a schematic side view in which a part of a brush height adjustment structure provided in the lawn cleaning vehicle of FIG. 1 is omitted, and shows a state where a brush case is lifted in a case of a setting position different from that in FIG. 9. FIG. 12 is a schematic side view in which a part of a brush height adjusting structure provided in the lawn cleaning vehicle of FIG. 1 is omitted, and shows a state where a brush case is lowered from the state of FIG. 11.

  Hereinafter, a specific embodiment of the brush height adjusting structure of the lawn cleaning vehicle of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic right side view showing an example of a lawn sweeper equipped with one embodiment of a brush height adjusting structure of the present invention. In the following description, the front side of the lawn cleaning vehicle 2 to which the brush height adjusting structure 1 (FIG. 2) of the present embodiment is applied is defined as the front side, and the rear side is defined as the rear side. That is, the left-right direction on the paper surface of FIG. 1 is the front-back direction, and the vertical direction on the paper surface of FIG. 1 is the left-right direction.

  In the lawn cleaning vehicle 2 of the present embodiment, an operator sits on a driver's seat 4 provided in front of the cleaning vehicle main body 3, grips a handle 5, and moves on a lawn to remove dust such as cut grass with a brush member 6. It is something that is cleaned up by scraping. The brush member 6 includes a shaft member 7 whose axis is arranged in the left-right direction, a brush 8 provided on the shaft member 7, and a support 9 for the brush 8 on the shaft member 7. The shaft member 7 is composed of a round bar-shaped shaft portion 10 whose axis is arranged in the left-right direction, a brush 8 and a holding portion 11 of the support portion 9. The holding portion 11 is formed in a substantially octagonal plate shape, and is arranged such that the plate surface is orthogonal to the axis of the shaft portion 10. Specifically, a plurality of holding parts 11 are arranged in the left and right direction so as to be separated from each other, and are fixed to the shaft part 10 with the shaft part 10 penetrating their plate surfaces. The brush 8 has a straight hair shape, and is disposed in a longitudinal direction at a substantially central portion in a width direction of a base material 12 formed in a substantially rectangular plate shape. The support portion 9 is formed by bending a rectangular plate material, and has a vertical cross section formed in a substantially J-shape.

  The support portion 9 is fixed to a step portion formed inwardly depressed on every other peripheral surface of each holding portion 11 having a substantially octagonal shape and eight sides around the periphery along the left-right direction which is the axial direction. Is done. At this time, each support portion 9 is fixed to the step portion so as to open outward. In addition, in a state where the brush 8 having a straight hair shape is erected on the base material 12, the base material 12 is fixed in each support portion 9, and is fixed to each support portion 9. Thus, the brush 8 is provided on the shaft member 7 so as to extend substantially radially outward, and the brush member 6 is configured.

  The brush member 6 is rotatably provided on the brush case 13. The brush case 13 is formed in a hollow shape, and the brush member 6 is rotatably arranged in the hollow portion. The brush case 13 of the present embodiment has a hollow box-shaped case main body portion 14 which is substantially circular in side view and opens downward, and a substantially rectangular tube which is substantially rectangular in front view and whose longitudinal direction is the left-right direction and vertically opened. And a communication part 15 having a shape of a circle. The case body 14 and the communication part 15 are connected such that the communication part 15 protrudes upward from the upper part of the case body 14. At this time, the inside of the case main body 14 and the communication part 15 communicate with each other. Therefore, the brush case 13 has an inlet 16 for introducing the dust scraped up by the brush member 6 into the inside, and an outlet 17 for guiding the introduced dust to the outside. That is, while the opening below the case body 14 is the inlet 16, the opening above the communicating part 15 is the outlet 17, and the inlet 16 is provided below the brush case 13, A discharge port 17 is provided above the brush case 13.

  The brush member 6 is rotatably provided in the case body 14. Specifically, a bearing is provided on the case body 14, and the shaft 10 of the brush member 6 is rotatably held through the bearing. At this time, the brush member 6 is arranged in the case main body 14 so that its axis extends in the left-right direction.

  The brush case 13 is provided below the cleaning car main body 3 between the front and rear wheels 18. At this time, the brush case 13 is provided such that the inlet 16 opens downward and the outlet 17 opens upward. At the lower end of the front wall, left side wall and right side wall of the brush case 13, a rubber cover member 19 formed in a substantially rectangular plate shape is provided to protrude downward with a bolt nut or the like.

  A hopper 20 is disposed above the brush member 6 and the brush case 13. The hopper 20 is formed in a hollow box shape, and includes a hopper body 21 having a substantially rectangular box shape having a hollow portion opening to the rear surface, and a door 22 for opening and closing the opening of the hopper body 21. . The door 22 is held rotatably about an axis whose upper end is held by the hopper body 21 in the left-right direction. The hopper 20 can be moved between an insertion state in which the upper end of the communication portion 15 of the brush case 13 is inserted thereinto and an extraction state in which the upper end of the communication portion 15 of the brush case 13 is drawn out from the inside. In addition, it is provided on the cleaning car main body 3. In this embodiment, the hopper 20 is held rotatably about an axis whose rear end is held by the cleaning car body 3 in the left-right direction. Thereby, the hopper 20 can be moved between the insertion state and the extraction state.

  Since the lawn cleaning vehicle 2 is configured as described above, it can clean the lawn while traveling forward on the lawn. The lawn is cleaned by rotating the brush member 6 arranged inside the brush case 13. Here, the brush member 6 can be rotated by an engine which is a driving means provided in the cleaning car main body 3. Specifically, an endless V-belt is wound around the engine pulley of the engine and the intermediate shaft pulley of the intermediate shaft provided in the cleaning car main body 3, and is wound around the right end of the intermediate shaft pulley and the shaft 10 of the brush member 6. An endless V-belt is wound around a provided brush pulley.

  At the time of cleaning, the upper end of the communication portion 15 of the brush case 13 is inserted into the hopper 20 in the insertion state. In this state, the brush member 6 is moved clockwise in FIG. Rotate. Thus, dust on the grass can be scraped up by the brush 8 of the brush member 6. The dust scooped up by the brush 8 is introduced into the brush case 13 through the inlet 16 of the brush case 13, and then stored in the hopper 20 through the outlet 17 of the brush case 13. At this time, if the dust on the lawn and the brush 8 are too close, the lawn will be damaged, and if it is too far away, the brush 8 will not easily lift the dust. For this reason, the lawn cleaning vehicle 2 is provided with a brush height adjusting structure 1 that can adjust the height of the brush member 6.

  2 to 8 are schematic views showing a brush height adjusting structure provided in the lawn cleaning vehicle of FIG. 1, FIG. 2 is a schematic perspective view showing a state viewed from the front, and FIG. 3 is an enlarged view of a portion A in FIG. 4 is an enlarged view of a portion B in FIG. 2, FIG. 5 is a schematic plan view, FIG. 6 is an enlarged view of a portion C in FIG. 5, FIG. 7 is an enlarged view of a portion D in FIG. 5, and FIG. FIG. The brush height adjusting structure 1 of the present embodiment is a brush height adjusting structure of the brush case 13 of the lawn cleaning vehicle 2 provided with the brush case 13 described above, and includes a lifting means 23 for moving the brush case 13 up and down. And a restricting means 24 for restricting the brush case 13 from moving below the set position when the brush case 13 is moved downward by the lifting / lowering means 23. The brush case 13, the lifting / lowering means 23, and the regulating means 24 are provided on the cleaning car main body 3. The cleaning car main body 3 includes a frame member 25 having a substantially rectangular frame shape in a plan view, left and right members 26 appropriately arranged in the frame member 25 in the left-right direction, and appropriately in the frame member 25 along the front-rear direction. And the front and rear members 27 to be arranged.

  The brush case 13 is formed in a hollow shape as described above, and is provided with hollow extending portions 28 that extend rearward at both left and right end portions of the case main body portion 14. At the rear side of the brush case 13, a pair of support members 29, 29 is provided on left and right ends of a left and right member 26 provided so as to bridge between a lower end of a left portion and a lower end of a right portion of the frame member 25. 29 are provided. The pair of support members 29, 29 have a substantially rectangular plate shape, and are bent in a direction in which both front and rear ends and a lower end are separated from each other, and are arranged with the plate surfaces facing left and right. At this time, the pair of support members 29, 29 are erected on the left and right members 26 via the base member 30 while being separated from each other in the left and right direction. Between the pair of support members 29, 29, a shaft portion 31 is provided along the axis in the left-right direction such that the upper ends thereof are bridged. The above-mentioned extension part 28 is arranged between the pair of support members 29, 29 with the shaft part 31 penetrating the tip part thereof. At this time, the extension part 28 is rotatable around the shaft part 31. Thereby, the brush case 13 is rotatable around the shaft portion 31 and is vertically movable with respect to the cleaning car main body 3.

  The elevating means 23 can be operated from the driver's seat 4 of the lawn cleaning car 2. The elevating means 23 of this embodiment includes a shaft portion 32 that is supported by the cleaning car main body 3, a first piece 33 and a second piece 34 provided on the shaft portion 32, and a drive that rotates the shaft portion 32 around its axis. Means 35.

  The shaft portion 32 is formed in a round bar shape, and is provided on the cleaning car main body 3 along the left-right direction. In this embodiment, the left and right ends of the shaft portion 32 are provided on the left and right members 26 via the support members 36, respectively. The left and right members 26 are provided on the front side of the brush case 13 so as to bridge between the left and right portions of the frame member 25. The support member 36 is formed in a plate shape, and extends upward and is fixed to both left and right ends of the left and right members 26 with the plate surfaces facing left and right. The left and right end portions of the shaft portion 32 are provided through the left and right support members 36, 36, respectively. At this time, the shaft portion 32 is provided on the support member 36 so as to be rotatable around its axis.

  Further, the shaft portion 32 is supported by the left and right members 26 via a support member 37 at an intermediate portion in the axial direction. The left and right members 26 are the left and right members 26 provided with the above-described left and right support members 36, 36, and a support member 37 is provided at an intermediate portion in the left and right direction. The support member 37 has a first member 38 provided on the left and right members 26 and a second member 39 through which the shaft portion 32 passes.

  The first member 38 is formed in a substantially L-shaped plate shape when viewed from the front, and one piece 40 is fixed to the left and right members 26, and the other piece 41 extends upward with the plate surface facing left and right. . The second member 39 has a fixing portion 42 to the first member 38 and a tubular portion 43 provided on the fixing portion 42. The fixing portion 42 is formed in a substantially rectangular plate shape in side view. The cylindrical portion 43 is formed in a cylindrical shape, and is provided to penetrate the rear end of the fixed portion 42. At this time, the cylindrical portion 43 is arranged so that the axial direction extends in the left-right direction. The second member 39 is fixed with a bolt nut or the like in a state where the fixing portion 42 is superimposed on the right surface of the other piece 41 of the first member 38. In the fixed state, the cylindrical portion 43 is arranged on the rear side of the first member 38.

  The shaft portion 32 is passed through the cylindrical portion 43 of the support member 37 fixed to the left and right members 26, so that the shaft portion 32 is supported by the left and right members 26 in the axial direction. At this time, the shaft portion 32 is rotatable around its axis. In this manner, the shaft portion 32 is supported by the left and right members 26 at both ends in the axial direction and the middle portion in the axial direction so as to be rotatable around the axis.

  The first piece 33 and the second piece 34 are formed in a long and narrow plate shape in the front and rear direction, and are arranged with the plate surfaces facing left and right. In the present embodiment, the first piece 33 and the second piece 34 are formed in the same shape, and the peripheral members thereof are arranged symmetrically.

  The second piece 34 is non-rotatably fixed to the right end of the shaft 32 with the right end of the shaft 32 penetrating the front end, and extends rearward. A shaft portion 44 is fixed to the rear end of the second piece 34 so as to penetrate therethrough, and the shaft portion 44 has an axis disposed in the left-right direction. A tubular member 45 is provided on a left portion of the second piece 34 of the shaft portion 44. The tubular member 45 is formed in a cylindrical shape, and is provided on the shaft portion 44 with the shaft portion 44 passed therethrough. At this time, the cylinder member 45 is rotatable around its axis. On the other hand, the first piece 33 is non-rotatably fixed to the left end of the shaft 32 in a state where the left end of the shaft 32 penetrates the front end, and extends rearward. A shaft portion 46 is fixed to the rear end of the first piece 33 so as to penetrate in the left-right direction, and a cylindrical tubular member 45 is rotated on the right side of the first piece 33 of the shaft portion 46. It is fitted as possible.

  On the left and right side walls of the brush case 13, mounting portions 47 are provided extending outward. The mounting portion 47 is formed in a substantially U-shaped plate shape that is open downward and in a side view. A cylindrical member 45 provided on the first piece 33 is disposed in the mounting portion 47 on the left side wall of the brush case 13, and a cylindrical member 45 is provided in the mounting portion 47 on the right side wall of the brush case 13. The provided tubular member 45 is arranged. In this manner, the first piece 33 has the front end fixed to the left end of the shaft portion 32 and the rear end provided on the left side wall of the brush case 13, and the second piece 34 has the front end The rear end of the brush case 13 is fixed to the right end of the brush case 13. Accordingly, the brush case 13 is supported in a state in which the extension portion 28 is supported by the shaft portion 31 and the mounting portion 47 is mounted on the cylindrical member 45 provided on each of the pieces 33 and 34. .

  The driving means 35 is means for vertically moving the brush case 13 by rotating the shaft portion 32 about its axis and rotating the first piece 33 and the second piece 34. In this embodiment, the driving means 35 is a cylinder. It is said. The cylinder 35 is provided on the cleaning car main body 3 via a shaft 49 provided on the pair of support members 48, 48. The pair of support members 48, 48 are formed in a plate shape, and the front and rear members 27 are provided to extend forward from the left and right members 26 to which the above-described support members 36 are fixed, with the plate surfaces facing left and right. Is provided in the middle part in the front-rear direction. The front ends of the front and rear members 27 are provided on the left and right members 26 provided so as to bridge the left and right portions of the frame member 25 in front of the left and right members 26 to which the support members 36 are fixed.

  The pair of support members 48, 48 have upper ends protruding upward from the front and rear members 27 and are fixed to the front and rear members 27 so as to be separated to the left and right. A shaft portion 49 is provided between the pair of support members 48, 48 so that the upper end portions of the shaft members 49 extend along the left-right direction. The cylinder 35 is disposed between the pair of support members 48 with the shaft portion 49 penetrating the base end thereof. At this time, the cylinder 35 is rotatable around the shaft 49. The cylinder 35 can be operated as desired by an operator by operating an operation unit provided at a position operable from the driver's seat 4 in front of the lawn cleaning vehicle 2.

  The rod 50 of the cylinder 35 is engaged with a pair of fixing members 51 fixed to the shaft portion 32. The pair of fixing members 51, 51 have a substantially fan-shaped plate shape in a side view, and a substantially arc-shaped pin hole 52 is formed in a peripheral portion thereof so as to penetrate in the left-right direction. The main part of the fan is fixed to the shaft portion 32 in a state where the pair of fixing members 51 and 51 are separated from each other in the left-right direction and face each other. At this time, the pair of fixing members 51, 51 are non-rotatably fixed to the shaft portion 32 in a state where the shaft portion 32 penetrates a main portion of the fan. In the rod 50 of the cylinder 35, the left and right ends of the pin 53 at the distal end are engaged with the pin holes 52, 52 of the left and right fixing members 51, 51, respectively. At this time, the pin 53 at the tip of the rod 50 is movably engaged along the pin hole 52. In addition, the pin hole 52 is formed in an arc shape along a circumference centered on the axis of the shaft portion 32.

  The regulating means 24 has a lever 54 for setting a set position, and a holding mechanism 55 for holding the brush case 13 at the set position set by the lever 54. The lever 54 has a cylindrical shape arranged along the up and down direction, and has an upper end portion inclined rightward. The holding mechanism 55 is fixed to the shaft member 56 provided on the cleaning car main body 3 so as to be rotatable by operation of the lever 54, the first fixing piece 57 fixed to the shaft member 56, and the shaft portion 32 of the elevating means 23. And a rod 59 having one end provided on the first fixed piece 57 and the other end provided on the second fixed piece 58.

  The shaft member 56 is formed in a cylindrical shape, and is provided on the cleaning car main body 3 via a shaft portion 61 provided on the pair of support members 60, 60. The pair of support members 60 and 60 are formed in a plate shape, and are provided on the left and right members 26 provided with the front ends of the front and rear members 27 to which the support members 48 of the cylinder 35 are fixed. At this time, the pair of support members 60 are provided on the left and right members 26 so as to extend rearward with the plate surfaces facing left and right and separated from each other in the left and right direction. A shaft portion 61 is provided between the pair of support members 60 so as to bridge the rear end portions thereof along the axis thereof in the left-right direction. The shaft member 56 is disposed between the pair of support members 60 with the shaft portion 61 penetrating therein. At this time, the shaft member 56 is provided on the shaft portion 61 so as to be rotatable around its axis.

  Further, a cylindrical tubular member 62 is fixed to the upper end of the shaft member 56 along the axis thereof in the front-rear direction. A shaft 63 provided at the lower end of the lever 54 is passed through the cylindrical member 62. At the lower end of the lever 54, a substantially U-shaped plate-shaped shaft mounting member 64 that opens downward is provided, and the shaft portion 63 is extended across both open ends of the shaft mounting member 64. Is provided. The lever 54 is provided on the shaft member 56 by passing the shaft portion 63 through the cylindrical member 62 fixed to the shaft member 56. Thus, by operating the lever 54, the shaft member 56 can be rotated around its axis. Further, the lever 54 can rotate around the cylindrical member 62.

  The first fixing piece 57 is formed in an elongated plate shape, and is arranged with the plate surface facing left and right. The first fixing piece 57 is non-rotatably fixed to the shaft member 56 with the shaft member 56 penetrating through one end. In the fixed state, the other end of the first fixing piece 57 protrudes outward. The shaft 65 is fixed to the other end of the projecting first fixing piece 57 so as to project leftward.

  The second fixing piece 58 is formed of a pair of plate members fixed to the shaft 32 of the elevating means 23. Specifically, the pair of second fixing pieces 58, 58 have a substantially fan-shaped plate shape in a side view, and a substantially arc-shaped pin hole 66 is formed in a peripheral portion thereof in a left-right direction. The main portion of the fan is fixed to the shaft portion 32 in a state where the pair of second fixing pieces 58 and 58 face each other while being separated from each other in the left-right direction. At this time, the pair of second fixing pieces 58, 58 are non-rotatably fixed to the shaft portion 32 in a state where the shaft portion 32 penetrates a main portion of the fan. Note that the pin hole 66 is formed in an arc shape along a circumference centered on the axis of the shaft portion 32.

  The rod 59 is formed in a rod shape, and one end is rotatably provided on the first fixing piece 57, and the other end is engaged with the pin hole 66 of the second fixing piece 58. One end of the rod 59 has the shaft 65 of the first fixing piece 57 inserted therein, and is held by the first fixing piece 57 by the shaft 65. Here, the rod 59 is rotatable around the shaft 65 and is rotatably held by the first fixing piece 57. On the other hand, in the rod 59, the left and right ends of the pin 67 at the other end are engaged with the pin holes 66, 66 of the left and right second fixing pieces 58, 58, respectively. At this time, the pin 67 at the other end of the rod 59 is movably engaged along the pin hole 66. Therefore, by operating the lever 54, the rod 59 can be moved in the front-rear direction by rotating the shaft member 56.

  The restricting means 24 further has a holding portion 68 that is held when the lever 54 has set the set position. The holding portion 68 has a substantially L-shaped plate shape in a side view, and has one piece extending vertically and another piece extending rearward at the upper end of the one piece, and one piece and the other piece. The parts are integrally formed to form an L-shape. At the upper end of the holding portion 68, a plurality of engaged portions 70 with which the engaging portions 69 of the lever 54 can be engaged are formed. In the present embodiment, the engaging portion 69 of the lever 54 is a protrusion provided to protrude rightward above the lever 54. On the other hand, the engaged portion 70 of the holding portion 68 is a through hole into which the projecting portion 69 can be inserted. Here, a plurality of (13 in the illustrated example) through-holes 70 are formed in an arc shape. At a substantially central portion in the vertical direction of the holding portion 68, a substantially arc-shaped through hole 71 in a side view is formed so as to penetrate in the left-right direction. The holding portion 68 is formed by bending both front and rear ends to the left.

  The holding portion 68 is erected on the front and rear members 27 extending forward from the left and right members 26 to which the pair of support members 60 of the shaft member 56 are fixed, with the plate surface facing left and right. The front ends of the front and rear members 27 are provided on the front and rear members 27 that bridge the left and right members 26 on which the shaft member 56 is provided and the front part of the frame member 25, and the left and right members 26 that bridge the left part of the frame member 25. . The front and rear members 27 are provided with a plate member 72 having a substantially L-shape in a plan view. With the corners of the front lower end of the holding member 68 superposed on the plate member 72, the holding member 68 is The lower end is fixed to the plate 72. In a state where the holding portion 68 is erected on the front and rear members 27 in this manner, the holding portion 68 is disposed on the right side of the lever 54. Here, the holding portion 68 and the lever 54 are arranged near the driver's seat 4 of the lawn cleaning vehicle 2. That is, the lever 54 is arranged at a position operable from the driver's seat 4 and is operable from the driver's seat 4. In the present embodiment, the plurality of through-holes 70 formed in the holding portion 68 are arranged along a circumference around the axis of the shaft portion 61, and the arc-shaped through holes formed in the holding portion 68 are formed. The hole 71 is formed in an arc shape along a circumference around the axis of the shaft portion 61.

  The lever 54 is engaged with the holding portion 68 as described above. That is, the lever 54 has the upper protrusion 69 inserted into the appropriate through hole 70 from the left among the plurality of through holes 70 formed in the holding portion 68. The lever 54 is provided with a plate member 73 that is substantially L-shaped in plan view. One piece 74 of the plate 73 is fixed to the front end of the lever 54. At this time, the other piece 75 of the plate member 73 is disposed so as to extend forward from the right end of the one piece 74 with the plate surface facing left and right. A screw hole 76 is formed in the other piece 75 of the plate member 73 so as to penetrate in the left-right direction. A bolt 77 is screwed into the screw hole 76 through a through hole 71 formed in the holding portion 68 in a substantially arc shape in a side view. In this embodiment, an urging means 78 for urging the lever 54 around the cylindrical member 62 in the direction of rotating toward the holding portion 68 is provided. The biasing means 78 is, for example, a coil spring, and one end is attached to a substantially U-shaped attachment portion 79 provided in the lever 54 so as to protrude rightward, and the other end is an upper end of the first fixing piece 57. Attached to the part.

  Next, a case where the height of the brush member 6 is adjusted using the brush height adjusting structure 1 of the present embodiment will be described. 9 and 10 are schematic right side views in which a part of the brush height adjusting structure of the present embodiment is omitted, and show a state in which the brush member is adjusted to a certain set position in time series. FIGS. 11 and 12 are schematic right side views in which a part of the brush height adjusting structure of the present embodiment is omitted, and a state where the brush member is adjusted to a set position different from FIGS. 9 and 10 is shown. Shown in the series.

  As shown in FIGS. 9 and 10, first, the brush case 13 provided with the brush member 6 is moved upward. This is performed by operating the operation unit from the driver's seat 4 to operate the cylinder 35. Specifically, the rod 50 of the cylinder 35 is contracted while the pin 53 at the distal end of the rod 50 of the cylinder 35 is in contact with one circumferential end of the pin hole 52, 52 of the pair of fixing members 51, 51. The shaft part 32 is rotated around its axis in the counterclockwise direction in FIGS. With the rotation of the shaft portion 32, the first piece 33 and the second piece 34 are rotated counterclockwise in FIGS. Thus, the mounting portion 47 provided on the left side wall of the brush case 13 is pushed upward by the cylindrical member 45 provided on the first piece 33, and the brush case is provided by the cylindrical member 45 provided on the second piece 34. The mounting portion 47 provided on the right side wall of the thirteen is pushed upward. Accordingly, the brush case 13 rotates clockwise in FIGS. 9 and 10 around the shaft portion 31 and moves upward. At this time, the cylindrical members 45 of the first piece 33 and the second piece 34 are moved while rotating to the front side of the mounting portion 47 from the position before the brush case 13 moves upward.

  Then, the setting position is set by the regulating means 24. The setting of the set position is performed by operating the lever 54. Specifically, with the bolt 77 loosened, the lever 54 is rotated around the cylindrical member 62 in a direction away from the holding portion 68 against the urging force of the coil spring 78, and in this state, the lever 54 is rotated. The projection 69 is inserted into the through hole 70 by rotating the lever 54 toward the holding portion 68 at an appropriate position. In this embodiment, the projecting portion 69 of the lever 54 is inserted into the through hole 70 located at the rearmost side among the plurality of through holes 70 formed in the holding portion 68. After the protrusion 69 of the lever 54 is inserted into the through hole 70, the bolt 77 is tightened. In this embodiment, since the lever 54 and the holding mechanism 55 provided with the lever 54 have the above-described configuration, the rod 59 of the holding mechanism 55 is positioned by operating the lever 54, so that the set position can be set. it can. Here, the setting position is set after the brush case 13 is moved upward, but may be set before the brush case 13 is moved upward.

  After the setting position is set by the restricting means 24, the rod 50 of the cylinder 35 is extended, and the shaft portion 32 is rotated clockwise in FIGS. 9 and 10 around its axis. With the rotation of the shaft portion 32, the first piece 33 and the second piece 34 are rotated clockwise in FIGS. Thereby, the mounting portion 47 of the left side wall of the brush case 13 is mounted on the cylindrical member 45 of the first piece 33, and the mounting portion of the right side wall of the brush case 13 is mounted on the cylindrical member 45 of the second piece 34. When the brush 47 is placed on the brush case 13, the brush case 13 can be rotated around the shaft 31 in the counterclockwise direction in FIGS. 9 and 10 to move the brush case 13 downward. At this time, the cylindrical members 45 of the first piece 33 and the second piece 34 are moved from the position before the brush case 13 moves downward to the rear side of the mounting portion 47 while rotating.

  When the shaft 32 rotates in the direction in which the brush case 13 moves downward, the pair of second fixing pieces 58 fixed to the shaft 32 are rotated clockwise in FIGS. 9 and 10. You. As the pair of second fixing pieces 58 rotate, the pin 67 at the distal end of the rod 59 comes into contact with one end in the circumferential direction of the pin hole 66 formed in the second fixing piece 58. Thus, the clockwise rotation of the shaft portion 32 is restricted, and the brush case 13 can be held at the set position by the holding mechanism 55. That is, the mounting portion 47 is placed on the cylindrical member 45 of the first piece 33 and the second piece 34, and the brush case 13 is stopped by the weight of the brush case 13.

  Next, the case where the setting position is changed will be described. As shown in FIGS. 11 and 12, first, the brush case 13 is moved upward. This is performed by operating the cylinder 35 in the same manner as described above. After the brush case 13 is moved upward, the setting position is set by the regulating means 24. The setting of the setting position is performed in the same manner as described above. However, here, the protruding portion 69 of the lever 54 is inserted into the through hole 70 arranged on the foremost side among the plurality of through holes 70 formed in the holding portion 68. That is, the position of the rod 59 is located rearward as compared with the above case. Then, after setting the set position, the brush case 13 is moved downward by operating the cylinder 35 in the same manner as described above. When the brush case 13 is moved downward, the pin 67 of the rod 59 comes into contact with one end of the pin hole 66 of the second fixing piece 58 in the circumferential direction, and the rotation of the shaft 32 is restricted. Thereby, the brush case 13 can be held at the set position by the holding mechanism 55. Here, as described above, since the position of the rod 59 is different from the case of FIGS. 9 and 10, the position of the brush case 13 is positioned lower than the case of FIGS. 9 and 10. That is, the set position is set lower than in the case of FIGS. 9 and 10. Therefore, as the through hole 70 into which the protrusion 69 of the lever 54 is inserted is set to the front side, the set position of the brush case 13 is lower.

  In the case of the brush height adjusting structure 1 of the present embodiment, the brush case 13 is moved downward by operating the elevating means 23 from the driver's seat 4. When the brush case 13 moves downward, the movement of the brush case 13 downward from a set position set by operating the lever 54 from the driver's seat 4 is restricted, and the brush case 13 is moved at the set position. Will be retained. Therefore, the height of the brush member 6 can be adjusted while sitting in the driver's seat 4, and workability can be improved. Further, in the case of the brush height adjusting structure 1 of the present embodiment, the lifting / lowering means 23 has a configuration in which the shaft portion 32 to which the first piece 33 and the second piece 34 are fixed is rotated by the cylinder 35, so that it is simple. It can be configured.

  Further, in the case of the brush height adjusting structure 1 of the present embodiment, the holding mechanism 55 holds the brush case 13 at the set position by restricting the rotation of the shaft portion 32 of the elevating means 23. Therefore, the restricting means 24 can have a simple configuration, and the downward movement of the brush case 13 can be restricted easily. In the case of the brush height adjusting structure 1 of the present embodiment, when the shaft portion 32 rotates, the pin 67 of the rod 59 is attached to one end of the pin hole 66 of the second fixing piece 58 in the circumferential direction. The contact makes it possible to restrict the rotation of the shaft portion 32. Therefore, the regulating means 24 can be a simpler mechanical mechanism.

  Further, in the case of the brush height adjusting structure 1 of the present embodiment, the lever 54 of the restricting means 24 can be held by the holding portion 68, so that the lever 54 can be prevented from moving unexpectedly. In the case of the brush height adjusting structure 1 of the present embodiment, the set position can be changed by changing the engaged portion 70 with which the engaging portion 69 of the lever 54 engages. Further, in the case of the brush height adjusting structure 1 of the present embodiment, the engaging portion 69 of the lever 54 is formed as a protruding portion, and the engaged portion 70 of the holding portion 68 is formed as a through hole. And the setting position can be easily changed.

  Further, in the case of the brush height adjusting structure 1 of the present embodiment, the bolt 77 is screwed into the screw hole 76 of the plate member 73 through the through-hole 71 formed in the holding portion 68 and having a substantially arc shape in side view. Can be prevented from coming off from the holding portion 68 unexpectedly. In the case of the brush height adjusting structure 1 of the present embodiment, since the coil spring 78 is provided, the projecting portion 69 of the lever 54 can be easily inserted into the through hole 70 of the holding portion 68. Further, in the case of the brush height adjusting structure 1 of the present embodiment, the brush case 13 is held at the set position in a state where the mounting portion 47 is placed on the tubular member 45 of the first piece 33 and the second piece 34. You. Therefore, at the time of cleaning, even if the brush case 13 comes into contact with an obstacle such as a stone and the brush case 13 is pushed upward, the brush case 13 can be released upward, thereby preventing the brush case 13 from being damaged. be able to.

  The brush height adjusting structure of the present invention is not limited to the configuration of the above-described embodiment, and can be appropriately changed without departing from the scope of the concept of the present invention.

  INDUSTRIAL APPLICATION This invention is suitably applied to the structure which adjusts the height of the brush of the lawn cleaning vehicle which cleans a lawn surface.

DESCRIPTION OF SYMBOLS 1 Brush height adjustment structure 2 Lawn cleaning car 3 Cleaning car main body 4 Driver's seat 6 Brush member 13 Brush case 16 Intake 17 Discharge port 23 Elevating means 24 Restriction means 32 Shaft part 33 First piece 34 Second piece 35 Cylinder (drive means)
54 Lever 55 Holding mechanism 56 Shaft member 57 First fixing piece 58 Second fixing piece 59 Rod 66 Pin hole 68 Holding part 69 Projecting part (engaging part)
70 Through hole (engaged part)

Claims (3)

A brush case, which is driven up and down by a brush member rotatably driven in the hollow interior, takes in dust from an inlet provided below, and discharges a brush case discharged from an outlet provided above, vertically below the cleaning car body. A brush height adjustment structure of the brush case of the provided lawn cleaning car,
Lifting means for vertically moving the brush case operable from the driver's seat of the lawn cleaning vehicle,
A lever operable from the driver's seat to set the set position, as a means for restricting movement of the brush case below a set position when the brush case is moved downward by the elevating means; A holding mechanism that holds the brush case at the set position set by a lever, and a regulating unit having :
The elevating means includes a shaft portion that is supported by the cleaning car main body, and a first piece having one end portion fixed to one axial end portion of the shaft portion and the other end portion provided on one side wall of the brush case. A second piece having one end fixed to the other axial end of the shaft and the other end provided on the other side wall of the brush case; and a drive for rotating the shaft about its axis. Means,
The brush height of a lawn cleaning vehicle, wherein the holding mechanism holds the brush case at the set position by restricting rotation of the shaft in a direction in which the brush case moves downward. Adjustment structure. The regulating means has an engaged portion with which the engaging portion of the lever can be engaged, and the lever sets the set position by engaging the engaging portion with the engaged portion. Having a holding portion held in a state,
The holding portion is formed with a plurality of the engaged portions,
The brush height adjusting structure for a lawn cleaning vehicle according to claim 1, wherein the set position is changed by changing the engaged portion with which the engaging portion engages. The holding mechanism includes a shaft member rotatably provided on the cleaning vehicle main body by operation of the lever, a first fixed piece fixed to the shaft member, and a second fixed piece fixed to the shaft portion. A rod having one end provided on the first fixed piece and the other end provided on the second fixed piece,
An arc-shaped pin hole is formed on the second fixing piece along a circumference around the axis of the shaft portion,
The rod has one end rotatably provided on the first fixed piece and the other end engaged with the pin hole of the second fixed piece,
When the shaft rotates in a direction in which the brush case moves downward, the other end of the rod contacts one end in the circumferential direction of the pin hole, whereby the rotation of the shaft is restricted. The brush height adjusting structure for a lawn cleaning vehicle according to claim 1 or 2 , wherein

Images