JP5774924B2 - Ground maintenance equipment - Google Patents

Description

  The present invention relates to a ground maintenance device.

  For example, grounds covered with soil, such as baseball fields, soccer fields, rugby fields, tennis courts, schoolyards, etc., become harder as they are used and stepped. If you continue to use it as it is, it will become very hard and you will be injured.

  A ground leveling machine is used to return the ground where the upper layer portion is consolidated in this manner to a condition suitable for the competition with moderate hardness. As this leveling machine, for example, a tractor that is a towing vehicle having a front wheel and a rear wheel and a leveling brush that is a working machine connected to the traction machine are known (for example, see Patent Document 1). The maximum width of the leveling brush is generally about the same as or slightly larger than the vehicle width of the tractor.

  In order to level a mound of a baseball field using the leveling machine described in Patent Document 1, for example, the towing vehicle is caused to run while turning so as to draw a vortex from the center of the mound toward the outside. However, in this case, depending on the size of the turning radius of the tow vehicle (a sudden turning with a relatively small turning radius), the tire mark of the rear wheel caused by the inner wheel difference between the front wheel and the rear wheel may not be leveled by the leveling brush. In other words, there is a problem that it remains as it is without being erased. In leveling work, it is necessary to erase the remaining tire marks in this way, and the leveling work is troublesome.

JP 2002-161510 A

  An object of the present invention is to perform maintenance work while reliably erasing a tire mark caused by an inner wheel difference or an outer wheel difference between a front wheel and a rear wheel of a towing vehicle when performing maintenance work while turning the ground. It is to provide a maintenance device.

Such an object is achieved by the present inventions (1) to (12) below.
(1) A ground maintenance device that is arranged to be connected to the rear in the traveling direction of a tow vehicle having a front wheel and a rear wheel, and is used for ground maintenance by towing with the tow vehicle,
A first working unit that is grounded to perform maintenance work on the ground;
A second working unit disposed behind the first working unit in the traveling direction, grounded to the ground together with the first working unit, and performing maintenance work on the ground;
A coupling mechanism that couples the first working unit and the second working unit, and moves the second working unit to the left and right in the traveling direction with respect to the first working unit ;
The coupling mechanism includes a first support portion that supports and fixes the first working portion, a second support portion that supports and fixes the second working portion, the first support portion, and the second support portion. It is composed of a long body arranged between the support part, its front end part is rotatably supported by the first support part, and its rear end part is rotatably supported by the second support part. A link mechanism having at least one connecting member, and when the towing vehicle turns, a frictional force is generated between the second working unit and the ground, and the frictional force causes the second A ground maintenance device, wherein the working unit is configured to move in the same direction as the turning direction .

  (2) The ground maintenance device according to (1), wherein the connection mechanism is configured such that when the towing vehicle turns, the second working unit moves in the same direction as the turning direction.

  (3) In the above (1) or (2), the connection mechanism is configured such that when the tow vehicle turns, the amount of movement of the second working unit changes according to the turning angle. The ground maintenance device described.

  (4) When the towing vehicle turns, the connection mechanism is configured such that a portion of the first working unit that has not been maintained by the first working unit caused by an inner wheel difference between the front wheel and the rear wheel is the second working unit. The ground maintenance device according to any one of (1) to (3), wherein the second working unit is configured to move so as to be supplemented with

(5) The tow vehicle has a handle for performing an operation of changing the traveling direction,
A transmission mechanism for transmitting the operating force of the handle to the coupling mechanism;
The ground according to any one of (1) to (4) , wherein when the handle is operated, the connection mechanism is operated in conjunction with the operation of the handle, with the operating force transmitted by the transmission mechanism. Maintenance equipment.

(6) The transmission mechanism includes a cylinder having a cylindrical cylinder body and a piston that slides within the cylinder body, and a communication fluid that is connected to the cylinder body and operates the piston. And the ground maintenance apparatus as described in said (5) which has at least 1 pipe from which the direction which the said working fluid flows differs according to the operation direction of the said handle | steering-wheel.

(7) The ground maintenance device according to (5) or (6) , wherein the connection mechanism moves the second working unit in the same direction as the operation direction of the handle.

(8) The length of the first working unit in the vehicle width direction of the tow vehicle is the same as the vehicle width of the tow vehicle,
The second working unit is intended the length of the vehicle width direction of the said towing vehicle is 1 to 1.7 times the length of the vehicle width direction of the towing vehicle of the first work portion the ( 1) The ground maintenance apparatus in any one of (7) .

(9) The ground maintenance apparatus according to any one of (1) to (8) , wherein the first working unit is a reiki, and the second working unit is a brush.

(10) Arranged between the first working unit and the second working unit, grounded to the ground together with the first working unit and the second working unit, and maintained with respect to the ground The ground maintenance apparatus according to any one of (1) to (9) , further including a third working unit that performs work.

(11) The ground maintenance device according to (10) , wherein the third working unit moves together with the second working unit by the operation of the coupling mechanism.

(12) The ground maintenance device according to (10) or (11) , wherein the third working unit is a leveler.

  According to the present invention, when the maintenance work is performed with the ground maintenance device while turning the ground, the second working unit can move in either the left direction or the right direction with respect to the first working unit. Thus, the maintenance work can be performed while reliably erasing the tire marks caused by the difference between the inner wheel and the outer wheel between the front wheel and the rear wheel of the turning towing vehicle.

It is a perspective view which shows 1st Embodiment of the ground maintenance apparatus of this invention. It is a top view of the ground maintenance apparatus shown in FIG. It is a top view which shows the state of a ground maintenance apparatus when the tow vehicle which pulls a ground maintenance apparatus turns left. It is a top view which shows the state of a ground maintenance apparatus when the tow vehicle which pulls a ground maintenance apparatus turns left. It is a top view which shows the state of a ground maintenance apparatus when the tow vehicle which pulls a ground maintenance apparatus turns right. It is the figure seen from the arrow A direction in FIG. It is a top view which shows the state of a ground maintenance apparatus when the tow vehicle which pulls the ground maintenance apparatus (2nd Embodiment) of this invention turns left. It is a top view which shows the state of a ground maintenance apparatus when the tow vehicle which pulls the ground maintenance apparatus (2nd Embodiment) of this invention turns right. It is a perspective view which shows the tow vehicle which pulls the ground maintenance apparatus shown in FIG.

  Hereinafter, the ground maintenance apparatus of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

<First Embodiment>
1 is a perspective view showing a first embodiment of the ground maintenance device of the present invention, FIG. 2 is a plan view of the ground maintenance device shown in FIG. 1, and FIGS. 3 and 4 respectively pull the ground maintenance device. FIG. 5 is a plan view showing the state of the ground servicing device when the towing vehicle turns to the left, FIG. 5 is a plan view showing the state of the ground servicing device when the towing vehicle pulling the ground servicing device turns to the right, and FIG. FIG. 9 is a perspective view showing a towing vehicle that pulls the ground maintenance device shown in FIG. 1. In the following, for convenience of explanation, the upper left side in FIG. 1 is referred to as “front” or “front”, and the lower right side is referred to as “rear” or “rear”, and is illustrated in FIGS. 7 and FIG. 8) is referred to as “front” or “front”, the lower side is referred to as “rear” or “rear”, and the left side in FIGS. 6 and 9 is referred to as “front” or “front”, right side. Is referred to as “rear” or “backward”. Further, the upper side in FIGS. 1, 6, and 9 is referred to as “upper” or “upper”, and the lower side is referred to as “lower” or “lower”. 2 to 5 (the same applies to FIGS. 7 and 8), the left side is referred to as “left” or “left”, and the right side is referred to as “right” or “right”.

  A ground maintenance device (hereinafter simply referred to as “maintenance device”) 1 shown in FIGS. 1 to 6 is covered with soil, such as a baseball field, a soccer field, a rugby field, a golf field, a tennis court, a schoolyard, a park, etc. It is a device that maintains the ground G. The maintenance device 1 is connected to the rear of the tractor 10, which is a towing vehicle, in the traveling direction, and is used by being pulled by the tractor 10. Hereinafter, the configuration of each unit will be described.

  As shown in FIGS. 4 and 9, the tractor 10 is a four-wheeled vehicle having two front wheels 102R and 102L and two rear wheels 103R and 103L. The front wheel 102R and the front wheel 102L are spaced apart from each other in the vehicle width direction, and the right side in the traveling direction of the tractor 10 is the front wheel 102R and the left side is the front wheel 102L. Similarly, the rear wheel 103R and the rear wheel 103L are also spaced apart from each other in the vehicle width direction. The rear wheel 103R on the right side and the rear wheel 103L on the left side in the traveling direction of the tractor 10 are arranged. The tractor 10 includes a vehicle body 101, a driver's seat 106 installed on the upper portion of the vehicle body 101, and a handle 107 provided on the driver's seat 106.

  An engine hood 104 is provided in a front portion of the vehicle body 101, and an engine 105 is installed in the engine hood 104. The tractor 10 travels (advances) by driving the rear wheels 103R and 103L by the engine 105. An operator (person) can be seated on the driver's seat 106. Further, by rotating the handle 107 provided in the driver's seat 106, the rotational force is transmitted to each front wheel 102, and an operation for changing the traveling direction, that is, steering is performed.

  As shown in FIGS. 1 and 9, a coupler (traction vehicle side coupling mechanism) 108 that couples the vehicle body 101 and the maintenance device 1 is installed in a rear portion of the vehicle body 101. The coupler 108 includes a first coupling portion 109R, a second coupling portion 109L, and a third coupling portion 109T. Each connecting portion is connected to three different locations of the maintenance device 1.

  The ground G can be maintained by traveling on the ground G while pulling the maintenance device 1 with such a tractor 10.

  As shown in FIGS. 1 to 6, the maintenance device 1 includes a first working unit 2, a second working unit 3 disposed behind the first working unit 2 in the traveling direction, and a first work. A third working unit 4 disposed between the unit 2 and the second working unit 3, and a coupling mechanism for connecting the first working unit 2, the second working unit 3, and the third working unit 4. (Apparatus side connection mechanism) 5.

  The first working unit 2, the second working unit 3, and the third working unit 4 are respectively grounded to the ground G and perform maintenance work on the ground G. The first working unit 2, the second working unit 3, and the third working unit 4 have different functions (use conditions). That is, the first working unit 2 is a reiki, the second working unit 3 is a leveling brush (brush), and the third working unit 4 is a leveler. In the maintenance device 1, during the traveling, the reiki, the leveler, and the leveling brush can pass through the same portion of the ground G sequentially from the front in the traveling direction. Reiki can loosen the upper layer of the ground G. The leveler can be adjusted to a predetermined height (tilt angle) while smoothing the surface of the portion loosened by the reiki. The leveling brush can smooth the surface smoothed by the leveler. As described above, the maintenance device 1 has working units having different functions, so that three types of work can be performed at one time (in this embodiment, “unraveling”, “roughening”, “finishing”). Can be performed in parallel. Thereby, the work efficiency in the maintenance work is improved.

  The first working unit 2 includes a long base (base) 21 and a plurality of tines 22 arranged on the lower surface side of the base 21. In addition, as a constituent material of the 1st working part 2, stainless steel is mentioned, for example.

  The base portion 21 is formed on a plate-like portion 211 having a plate shape, two sets of connection portions 212 provided on the upper surface of the plate-like portion 211, connected to the coupling mechanism 5, and on the lower surface of the plate-like portion 211. 22 and a support portion 213 that supports 22.

  The plate-like portion 211 is arranged in a direction substantially orthogonal to the traveling direction of the maintenance device 1 (tractor 10).

  Each set of connection portions 212 includes a pair of plate pieces 214 protruding from the upper surface of the plate-like portion 211. The pair of plate pieces 214 are arranged in parallel with each other in the longitudinal direction of the plate-like portion 211. Then, a part of the coupling mechanism 5 (steel material 612 or 614) is sandwiched between the pair of plate pieces 214, and the first working unit 2 is fixed to the coupling mechanism 5 by screwing in that state.

  The support portion 213 supports and fixes the plurality of tines 22 at equal intervals along the longitudinal direction of the plate-like portion 211.

  Each tine 22 is fixed to the support portion 213 by, for example, screwing so as to protrude downward. Each tine 22 comes into contact with the ground G, and further enters the ground by being pressed toward the ground G by the weight of the maintenance device 1. When the tractor 10 moves forward in this state, the maintenance device 1 is pulled, and accordingly, the upper layer portion of the ground G is reliably crushed by each tine 22 inserted into the ground. As described above, when the ground G is loosened (maintained), the tine 22 is reliably pressed against the ground G, so that the loosening work is reliably performed. Further, even when there is a swell, for example, in the ground G, each tine 22 is pressed, so that the maintenance device 1 is prevented from jumping up by the swell during traveling and the tine 22 being separated from the ground G. When each tine 22 is separated from the ground G, the separated portion of the ground G is not loosened by each tine 22, but as described above, the separation of each tine 22 from the ground G is prevented. Inconvenience can be reliably prevented. As a result, the entire ground G can be reliably unraveled by a single run of the maintenance device 1, and thus the unraveling work can be performed quickly.

  The second working unit 3 includes a long base (base) 31 and a brush part 32 protruding from the lower surface of the base 31.

  The base 31 has a plate shape and is arranged in a direction substantially perpendicular to the traveling direction of the maintenance device 1. The base 31 is fixed to the coupling mechanism 5 from the upper side by, for example, screwing. Examples of the constituent material of the base 31 include stainless steel and wood.

  The brush portion 32 is composed of a large number of brush hairs, and each brush hair is fixed to the base portion 31 by, for example, adhesion (adhesion with an adhesive or a solvent). As a constituent material of each brush hair, for example, various metal materials, various resin materials and the like can be used alone or in combination, and among these materials, polypropylene (PP) is particularly preferable.

  Such a second working unit 3 presses the ground G together with the first working unit 2 due to the weight of the maintenance device 1. When the tractor 10 travels forward in this state, the second working unit 3 is pulled together with the first working unit 2, and the ground G is surely swept (maintened) by the brush unit 32. Work is performed.

  The third working unit 4 is composed of a long base (base) 41 and two plate pieces 42 and 43 protruding from the lower surface of the base 41. In addition, as a constituent material of the 3rd working part 4, stainless steel is mentioned, for example.

  The base 41 is an assembly of four steel materials 411 in a frame shape, and is arranged in a direction substantially perpendicular to the traveling direction of the maintenance device 1. The base 41 is fixed to the coupling mechanism 5 from the upper side by, for example, screwing.

  The plate piece 42 is fixed to the steel material 411a located in front of the four steel materials 411 constituting the base 41, and the plate piece 42 is fixed to the steel material 411b located in the rear. The plate pieces 42 and 43 are arranged so as to stand upright with respect to the ground G (see FIG. 6).

  Such a third working unit 4 presses the ground G together with the first working unit 2 and the second working unit 3 due to the weight of the maintenance device 1. When the tractor 10 travels forward in this state, the third working unit 4 is pulled together with the first working unit 2 and the second working unit 3, and roughing work is performed by the plate pieces 42 and 43. .

As shown in FIG. 2, in the first working unit 2, the length L ₁ of the tractor 10 in the vehicle width direction is the same as the vehicle width L _{0 of the} tractor 10.

The second working unit 3 is equal to or longer than the length L ₁ of the length L ₂ is the vehicle width direction of the tractor 10. As the length _{L 2,} not particularly limited, for example, is preferably from 1 to 1.7 times the length _{L 1,} and more preferably 1 to 1.5 times.

The third working unit 4 is of intermediate size between the same or length L ₁ and length L ₂ is the vehicle width direction of the length L ₃ of the tractor 10 and the length L _1. The length L ₃ is not particularly limited, and is preferably ₁ to 1.5 times the length L ₁ , and more preferably 1 to 1.2 times, for example.

Since there is such a magnitude relationship between the vehicle width L ₀ , the lengths L ₁ , L ₂ , and L ₃ , the width of the entire traveling body constituted by the tractor 10 and the maintenance device 1 connected thereto. Can be suppressed as much as possible. Thereby, for example, when the ground G is surrounded by a fence (or a wall), when the traveling body passes through the entrance / exit provided in the fence, the passage is easily performed depending on the size of the entrance / exit. be able to.

  The first working unit 2, the second working unit 3, and the third working unit 4 as described above are connected to each other via a connecting mechanism 5.

  As shown in FIGS. 1 to 3, 5, and 6, the coupling mechanism 5 includes a first support portion 6 that supports and fixes the first work portion 2, a second work portion 3, and a third work. This is a link mechanism having a second support part 7 that supports and fixes the part 4 collectively, and two connecting members 8 a and 8 b that connect the first support part 6 and the second support part 7. The 1st support part 6, the 2nd support part 7, and the connection members 8a and 8b can each be comprised with the elongate steel materials comprised, for example with stainless steel.

  The first support portion 6 includes a frame portion 61 that has a rectangular shape in plan view, and poles 62, 63, and 64 that are installed upright from the frame portion 61.

  The frame portion 61 is obtained by assembling four steel materials 611, 612, 613, and 614 into a frame shape. As shown in FIG. 2, one connecting portion 212 of the two sets of connecting portions 212 of the first working portion 2 that is a reiki is attached to the steel material 612 located on the left side of these steel materials 611 to 614. The other connecting portion 212 is connected to the steel material 614 that is connected and located on the right side. Thereby, the 1st working part 2 will be fixed to the 1st support part 6 by fixing methods, such as screwing, for example.

  Further, a pole 62 is disposed at a corner portion 615 formed by the steel materials 611 and 614, and a pole 63 is disposed at a corner portion 616 formed by the steel materials 611 and 612, in the longitudinal direction of the steel material 611. A pole 64 is disposed at the center. The pole 62 is connected to the first connecting portion 109R of the coupler 108 of the tractor 10, the pole 63 is connected to the second connecting portion 109L, and the pole 64 is connected to the third connecting portion 109T. Is connected. Thereby, the tractor 10 and the maintenance apparatus 1 will be connected.

  As shown in FIG. 1, FIG. 2, and FIG. 6, the second support part 7 is installed suspended from the frame part 71, the brush catcher 72 installed at the rear part of the frame part 71, and the frame part 71. Arm 73a, 73b, 73c, 73d.

  The frame portion 71 is an assembly of three steel materials 711, 712, 713 in an “H” shape in plan view, that is, a steel material 711, a steel material 712 located at the left end of the steel material 711, and the right end of the steel material 711 It is comprised with the steel material 713 located in a part.

  The brush catcher 72 has a fixed plate 721 to which the upper surface of the base 31 of the second working unit 3 that is a leveling brush is fixed. Thereby, the 2nd working part 3 can be fixed to the 2nd support part 7 by fixing methods, such as screwing, for example.

  In addition to the fixed plate 721, the brush catcher 72 includes a connection arm 722 that connects the fixed plate 721 and the rear end portion of the steel material 712 of the frame portion 71, and a rear end portion of the steel plate 713 of the fixed plate 721 and the frame portion 71. And a beam 724 installed between the connection arm 722 and the connection arm 723.

  Furthermore, the beam 724 is connected to two places in the longitudinal direction of the steel material 711 of the frame portion 71 through the reinforcing beams 74a and 74b. Thereby, the connection between the frame part 71 and the brush catcher 72 is reinforced.

  As shown in FIGS. 1 and 6, the upper ends of the arms 73a and 73b are connected to both ends of the steel material 712 of the frame portion 71, and the arms 73c and 73d are connected to both ends of the steel material 713, respectively. The upper end is connected. And the upper surface of the base 41 of the 3rd working part 4 which is a leveler is connected to the lower end part of the arms 73a, 73b, 73c, 73d. As a result, the third working unit 4 is supported by the second support unit 7.

  Between the 1st support part 6 and the 2nd support part 7, the connection members 8a and 8b comprised by the elongate body are spaced apart and arrange | positioned at the vehicle width direction. The front end portion 81 of the connecting member 8 a is rotatably supported by the corner portion 615 of the frame portion 61 of the first support portion 6, and the rear end portion 82 is a steel material 712 of the frame portion 71 of the second support portion 7. It is supported at the front end of the shaft so as to be rotatable. The front end 81 of the connecting member 8 b is rotatably supported by the corner 616 of the frame 61 of the first support 6, and the rear end 82 is a steel 713 of the frame 71 of the second support 7. It is supported at the front end of the shaft so as to be rotatable. As the rotation support mechanism that rotatably supports the connecting members 8a and 8b, for example, in this embodiment, a mechanism having a shaft and a bearing, that is, a pivot joint can be used.

  By connecting the first support portion 6 and the second support portion 7 via the connecting members 8a and 8b, the second working portion 3 and the first working portion 2 are connected. The third working unit 4 can be moved collectively to the left (see FIGS. 3 and 4) and the right (see FIG. 5) in the traveling direction.

  Next, the case where the maintenance apparatus 1 having the above configuration is used for maintenance of the ground G will be described. As an example of the ground G to be maintained, the baseball field mound M and its surroundings are given as an example. Further, the tractor 10 that pulls the maintenance device 1 can turn in either the left turn (see FIGS. 3 and 4) or the right turn (see FIG. 5). Although it will be pulled in the turning direction, here, the case where it turns left is demonstrated typically.

  As shown in FIG. 4, the mound M usually has a circular shape in plan view. In order to maintain the mound M and its surroundings, the center side of the mound M is used as a start point, and the vehicle travels gradually along the direction toward the outer peripheral side so as to draw a spiral (in a spiral).

When the tractor 10 turns to the left, an inner wheel difference is generated between the front wheel 102L and the rear wheel 103L, and an outer wheel difference is generated between the front wheel 102R and the rear wheel 103R. Therefore, the rear of the tractor 10, the front wheels 102L tire marks _{S 102L} to the ground G, the front wheels 102R tire marks _{S 102R,} tire marks _{S 103L} of the rear wheels 103L, tire marks _{S 103R} of the rear wheel 103R remains. Tire marks _{S 102L,} tire marks _{S 102R,} tire marks _{S 103L,} among tire marks _{S 103R,} tire marks _{S 103L} is positioned innermost. The tire mark S _102L , the tire mark S _102R , and the tire mark S _103R located outside the tire mark S _103L are sequentially maintained in the first working part 2, the third working part 4, and the second working part 3. To be erased. However, although the tire mark S _103L depends on the separation distance between the rear wheel 103L and the first working unit 2, the tire working S _103L cannot be maintained in the first working unit 2 and remains as it is.

On the other hand, as shown in FIGS. 3 and 4, in the maintenance device 1, when the tractor 10 turns leftward, the turning center is set between the second working unit 3 and the third working unit 4 and the ground G. A frictional force F is generated in the tangential direction of the center circle. Due to the component (component force f _x ) of the frictional force F toward the turning center, that is, in the direction perpendicular to the horizontal direction with respect to the traveling direction, the second working unit 3 and the third working unit 4 are moved inward. As the tractor 10 continues to turn while remaining (on the spot), the first working unit 2 is moved to the left as a result. In this state, since the second working unit 3 and the third working unit 4 are _pulled , the tire trace S _103L that has not been erased by the first working unit 2 can be erased reliably ( the most reference trajectory T ₃ of the inner end 33 of the second working section 3 in FIG. 4).

In addition, the ground G is dug up at each tine 22 of the first working unit 2 which is a reiki, and the portion on the center side (inside) of the mound M among the dug up portions is the same as the tire mark S _103L. hard off, ie, likely will remain dug up (see the trajectory T ₂ of the first work portion 2 of the innermost end 23 in FIG. 4). However, this trajectory T ₂ can also be reliably maintained and erased by the second working unit 3 and the third working unit 4.

  As described above, when the maintenance device 1 performs the maintenance of the ground G, even if a portion (hereinafter referred to as “unmaintenance portion”) that cannot be maintained by the first working portion 2 occurs, The part 3 and the third working part 4 can move to complement the unmaintained part, and therefore the maintenance work can be performed reliably.

  Further, in the connection mechanism 5 of the maintenance device 1, as described above, the connection members 8 a and 8 b are rotatably supported and connected to the first support portion 6 by pivot joint, and the second support portion 7 is connected. Are also pivotally supported and connected by pivot joints. Thereby, when the tractor 10 turns, the movement amounts of the second working unit 3 and the third working unit 4 with respect to the first working unit 2 change according to the turning angle, that is, the turning angle. If the angle is large, the amount of movement also increases. Regardless of the turning angle, the second working part 3 and the third working part 4 can reliably maintain the unmaintained part.

Second Embodiment
FIG. 7 is a plan view showing a state of the ground maintenance device when the towing vehicle pulling the ground maintenance device (second embodiment) of the present invention turns to the left, and FIG. 8 shows the ground maintenance device (second embodiment) of the present invention. It is a top view which shows the state of a ground maintenance apparatus when the tow vehicle which pulls embodiment) turns right.

  Hereinafter, the second embodiment of the ground maintenance device of the present invention will be described with reference to these drawings. However, the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.

  This embodiment is the same as the first embodiment except that the ground maintenance device further includes a transmission mechanism.

  As shown in FIGS. 7 and 8, the maintenance device 1 of the present embodiment further includes a transmission mechanism 9 that transmits the operating force to the coupling mechanism 5 when the handle 107 of the tractor 10 is operated.

  The transmission mechanism 9 includes a hydraulic cylinder (cylinder) 91, and a first pipe 92 a and a second pipe 92 b connected to the hydraulic cylinder 91.

  The hydraulic cylinder 91 is disposed between the connecting member 8a and the connecting member 8b of the connecting mechanism 5 so as to be inclined with respect to the traveling direction. The hydraulic cylinder 91 includes a cylindrical cylinder body 911 and a piston 912 that slides within the cylinder body 911. The end of the cylinder body 911 is supported in the middle of the steel material 611 of the first support portion 6 of the connection mechanism 5 in the longitudinal direction, for example, by pivot joint. The end portion of the piston 912 is supported in the middle of the third working portion 4 (or the second support portion 7 of the coupling mechanism 5) in the longitudinal direction so as to be rotatable, for example, by pivot joint.

  Each of the first pipe 92a and the second pipe 92b is a member through which hydraulic oil that is a working fluid that operates the piston 912 passes. Each pipe is connected to a different position in the longitudinal direction of the cylinder body 911 and communicates with the cylinder body 911.

  Then, as shown in FIG. 7, when the handle 107 is operated so that the tractor 10 turns to the left, hydraulic oil is supplied from the first pipe 92a into the cylinder body 911 by the operation of a valve (not shown). . As a result, the piston 912 is pushed out (projects) from the cylinder body 911, and the hydraulic cylinder 91 extends as a whole. By this extension, the second working unit 3 and the third working unit 4 can move together in the left direction in FIG. At this time, the hydraulic oil is discharged from the cylinder body 911 through the second pipe 92b.

  Further, as shown in FIG. 8, when the handle 107 is operated so that the tractor 10 turns to the right, the hydraulic oil is supplied from the second pipe 92b into the cylinder body 911 by the operation of a valve (not shown). The As a result, the piston 912 is retracted (immersed) into the cylinder body 911, and the hydraulic cylinder 91 contracts as a whole. By this contraction, the second working unit 3 and the third working unit 4 can be moved to the right in FIG. At this time, the hydraulic oil is discharged from the cylinder body 911 through the first pipe 92a.

  With such a transmission mechanism 9, the coupling mechanism 5 can operate in conjunction with the operation of the handle 107 by transmitting the operation force when the handle 107 is operated. Thereby, in the connection mechanism 5, the 2nd working part 3 and the 3rd working part 4 can be reliably moved in the same direction as the operation direction of the handle 107, for example, regardless of the state of the ground G. Therefore, the unmaintained part of the ground G can be reliably maintained by the second working part 3 and the third working part 4.

  As mentioned above, although the ground maintenance apparatus of this invention was demonstrated about embodiment of illustration, this invention is not limited to this, Each part which comprises a ground maintenance apparatus is arbitrary structures which can exhibit the same function. Can be substituted. Moreover, arbitrary components may be added.

  Moreover, although the connection mechanism of the ground maintenance apparatus has two connection members in each of the above embodiments, the connection mechanism is not limited thereto, and may have, for example, one connection member. It may have three or more connecting members.

In addition, the first working unit, the second working unit, and the third working unit of the ground maintenance device are the reiki, the leveler, and the leveling brush in the above-described embodiments, respectively, but are not limited thereto. For example, a reiki, a leveling brush, and a roller may be sufficient, and a reiki, a leveler, and a roller may be sufficient.
In the ground maintenance device, the third working unit can be omitted.

  Moreover, although the transmission mechanism has two pipes in the second embodiment, the ground maintenance device is not limited to this. For example, even if the transmission mechanism has one pipe, Good.

  Moreover, the coupler of a tow vehicle may be comprised so that a ground maintenance apparatus may be raised / lowered up and down. In this case, the first working unit, the second working unit, and the third working unit may be moved up and down collectively, or each working unit may be moved up and down independently. As this raising / lowering mechanism, it can be set as the thing which has a hydraulic cylinder, a motor, etc., for example.

1 Ground maintenance equipment (maintenance equipment)
2 First working part 21 Base (base)
211 plate-like portion 212 connection portion 213 support portion 214 plate piece 22 tine 23 end portion 3 second working portion 31 base portion (base)
32 Brush portion 33 End portion 4 Third working portion 41 Base portion (base)
411, 411a, 411b Steel material 42, 43 Plate piece 5 Connection mechanism (apparatus side connection mechanism)
6 First support part 61 Frame part 611, 612, 613, 614 Steel 615, 616 Corner part 62, 63, 64 Pole 7 Second support part 71 Frame part 711, 712, 713 Steel 72 Brush catcher 721 Fixing plate 722 , 723 Connection arm 724 Beam 73a, 73b, 73c, 73d Arm 74a, 74b Reinforcement beam 8a, 8b Connecting member 81 Front end portion 82 Rear end portion 9 Transmission mechanism 91 Hydraulic cylinder (cylinder)
911 Cylinder body 912 Piston 92a 1st pipe 92b 2nd pipe 10 Tractor 101 Car body 102R, 102L Front wheel 103R, 103L Rear wheel 104 Engine hood 105 Engine 106 Driver's seat 107 Handle 108 Coupler (traction vehicle side coupling mechanism)
109R first connecting portion 109L second connecting portion 109T third connecting portion F frictional force f _x component force G Ground L ₀ vehicle width L _{1, L} 2, _{L 3} length M mound _{S 102R,} S _102L, S _{103R, S 103L} tire marks _{T 2,} T ₃ locus

Claims (12)

A ground maintenance device that is arranged to be connected to the rear in the traveling direction of a tow vehicle having a front wheel and a rear wheel and is used for ground maintenance by towing with the tow vehicle,
A first working unit that is grounded to perform maintenance work on the ground;
A second working unit disposed behind the first working unit in the traveling direction, grounded to the ground together with the first working unit, and performing maintenance work on the ground;
A coupling mechanism that couples the first working unit and the second working unit, and moves the second working unit to the left and right in the traveling direction with respect to the first working unit ;
The coupling mechanism includes a first support portion that supports and fixes the first working portion, a second support portion that supports and fixes the second working portion, the first support portion, and the second support portion. It is composed of a long body arranged between the support part, its front end part is rotatably supported by the first support part, and its rear end part is rotatably supported by the second support part. A link mechanism having at least one connecting member, and when the towing vehicle turns, a frictional force is generated between the second working unit and the ground, and the frictional force causes the second A ground maintenance device, wherein the working unit is configured to move in the same direction as the turning direction .   The ground connection device according to claim 1, wherein the connection mechanism is configured such that when the towing vehicle turns, the second working unit moves in the same direction as the turning direction.   The ground maintenance device according to claim 1 or 2, wherein the connection mechanism is configured such that when the towing vehicle turns, the amount of movement of the second working unit changes according to the turning angle.   The connecting mechanism supplements a portion of the first working portion that has not been completely maintained by the second working portion, which is caused by an inner wheel difference between the front wheel and the rear wheel when the towing vehicle turns. Thus, the ground maintenance apparatus according to any one of claims 1 to 3, wherein the second working unit is configured to move. The tow vehicle has a handle for performing an operation of changing the traveling direction,
A transmission mechanism for transmitting the operating force of the handle to the coupling mechanism;
5. The ground maintenance device according to claim 1 , wherein when the handle is operated, the operating force is transmitted by the transmission mechanism, and the connection mechanism operates in conjunction with the operation of the handle. The transmission mechanism is connected to a cylinder having a cylindrical cylinder body and a piston that slides in the cylinder body, and communicates with the cylinder body, and a working fluid that operates the piston passes through the cylinder. The ground maintenance apparatus according to claim 5 , further comprising at least one pipe having a direction in which the working fluid flows according to an operation direction of the handle. The ground maintenance device according to claim 5 or 6 , wherein the connection mechanism moves the second working unit in the same direction as an operation direction of the handle. The length of the first working unit in the vehicle width direction of the tow vehicle is the same as the vehicle width of the tow vehicle,
The second working section, claim that the length of the vehicle width direction of the towing vehicle is of 1 to 1.7 times the length of the vehicle width direction of the towing vehicle of the first work portion The ground maintenance apparatus in any one of 1 thru | or 7 . The ground maintenance device according to any one of claims 1 to 8 , wherein the first working unit is a reiki, and the second working unit is a brush. The first working unit and the second working unit are disposed between the first working unit and the second working unit, and are grounded together with the first working unit and the second working unit to perform maintenance work on the ground. The ground maintenance apparatus according to any one of claims 1 to 9 , further comprising a third working unit. The ground maintenance device according to claim 10 , wherein the third working unit moves together with the second working unit by the operation of the coupling mechanism. The ground maintenance device according to claim 10 or 11 , wherein the third working unit is a leveler.

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