JP2001128504A - Device for maintaining surface of lawn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lawn surface-maintaining device which can carry out two types of with a single device work. SOLUTION: This vertical slicer 1 is provided with a main body frame 101, a power-transmitting mechanism 400 which can change and output a rotation movement inputted from a power source into a rotation movement in the first rotation direction and a rotation movement in the second rotation direction opposite to the first rotation direction, and a hexagonal blade shaft 329 which can be rotated in response to the output of the power-transmitting mechanism 400 and to which a blade 340 for maintaining the surface of a lawn can be attached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn care device, and more particularly to a device for treating a lawn such as a green golf course, a baseball stadium, and a soccer field.

[0002]

2. Description of the Related Art In recent years, with the rapid increase in the golf population, many golf courses have been created. Generally, a lawn is planted in a golf course, and a competitor plays on the lawn.

At a golf course, various measures are taken to prevent the lawn from dying. As one of the measures, there is an operation of removing scum existing between lawns. If the lawn is densely planted, there will be undergrown and withered lawn between the lawns. When this withered lawn is present, there are no gaps on the lawn surface, and the growth of a healthy lawn is slowed down. In order to prevent this, it is necessary to remove this debris.

[0004] As a device for removing wilt, a vertical device has been conventionally known. The vertical device is usually towed by a tractor or the like, and rotates a blade by using an engine of the tractor as power. The vertical apparatus performs a vertical operation of lightly scratching a lawn surface with a blade to remove swarf on the lawn surface. At this time, the vertical device rotates the blade in a direction that does not cause resistance in the traveling direction of the vertical device. Vertical work creates small gaps on the grass surface, which allows better penetration of water and fertilizers. As a result, the lawn growth can be promoted, and the green lawn can be always maintained.

Also, the grass surface becomes hard when stepped on by a person,
An impermeable layer (root zone) is formed in a portion having a depth of 20 to 30 mm from the surface. In this impervious layer, the roots of the lawn are intricately intertwined by the pressure of the human weight and the like, and the bulk density of the soil is large. When an impermeable layer is present, even if water or fertilizer is applied to the lawn surface, they do not seep down from the impermeable layer. As a result, there is a problem that water and fertilizer do not penetrate deep under the lawn, thereby impairing lawn growth.

Conventionally, a device called a slicing device is used to eliminate the impermeable layer. The slicing device is also usually towed by a tractor or the like, and rotates the blade by using the engine of the tractor as power. The slicing device performs a slicing operation in which a rotating blade is inserted into the water-impermeable layer and cuts off grass roots that are entangled with each other, thereby eliminating the water-impermeable layer. At this time, the slicing device rotates the blade in a direction that causes resistance to the traveling direction of the slicing device.

[0007]

As described above, conventionally,
Maintenance of a golf course or the like requires two maintenance devices, a vertical device for performing a vertical operation and a slicing device for performing a slicing operation. Since the two devices differ in the direction in which the blade is rotated, these two operations could not be performed by one device. Therefore, there is a problem that the maintenance cost of the two devices is increased and a space for accommodating the devices is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a lawn surface care device which can perform two operations with one device. It is to be.

[0009]

A lawn surface care device according to the present invention includes a main body, a power transmission mechanism, and a working shaft. The power transmission mechanism may convert the rotational motion input from the power source into a rotational motion in a first rotational direction and a rotational motion in a second rotational direction opposite to the first rotational direction and output the rotational motion. Can be attached to the body as possible. The work shaft is rotatably mounted on the main body in accordance with the output of the power transmission mechanism, and can be provided with a blade for cutting a lawn surface.

In the lawn surface care device configured as described above, the power transmission mechanism converts the rotational motion input from the power source into a first rotational direction and a second rotational direction, and outputs the converted rotational motion. The work shaft rotates according to this output. That is, the working shaft rotates in the first rotation direction and the second rotation direction.
Further, it is possible to attach a blade for taking care of the lawn surface to the work shaft. Therefore, a certain work can be performed by attaching a certain blade and rotating the work shaft in the first rotation direction, and by attaching another blade to the work shaft and rotating the work shaft in the second rotation direction. Other tasks can be performed. As a result, it is possible to provide a lawn surface care device capable of performing two operations by switching the rotation direction of the operation shaft and replacing the blade.

Preferably, in the apparatus, the main body is fixed to a predetermined position while rotating the operation shaft in the first rotation direction in a state where the first blade is attached to the operation shaft and the first blade is in contact with the lawn surface. The first operation is performed by moving in the direction.
The device is configured such that the main body is moved in a predetermined direction while rotating the work shaft in the second rotation direction in a state where the second blade is attached to the work shaft and the second blade is in contact with the lawn surface. Perform the work of 2.

[0012] Preferably, the first operation includes rotating the first blade in a first rotation direction which does not cause a resistance relative to the moving direction of the main body. This is a vertical operation to remove scum. Second
The operation is performed by rotating the second blade in a second rotation direction that is relatively resistant to the moving direction of the main body, thereby eliminating the water-impermeable layer formed under the grass surface with the second blade. Slicing work.

In this case, the first blade is rotated in the first rotation direction to perform a vertical operation, and the second blade is moved to the second rotation direction.
A turf surface care device that performs vertical work and slicing work by one unit by performing a slicing work by rotating in the direction of rotation, that is, by switching the rotating direction and replacing the blade.

Preferably, the power transmission mechanism is capable of idling the work shaft without transmitting the rotational motion input from the power source to the work shaft.
The aeration work for making a hole in the lawn surface is performed by moving the main body in a predetermined direction while idling the work shaft while the third blade is in contact with the lawn surface with the blade attached.

In this case, aside from the above-mentioned first and second operations, a third operation can be performed for aeration, and a single unit can perform three operations. An apparatus can be provided. In addition,
In the aeration work, a number of holes can be made in the lawn surface, increasing the surface area of the lawn surface, making it easier for the lawn to absorb water and fertilizer, and activating the microorganisms (bacteria) on the lawn surface. Play a role in helping to grow.

Preferably, the apparatus further comprises a seeding mechanism connected to the main body, so that the seeding is performed by the seeding mechanism simultaneously with performing the aeration operation.

In this case, since seeds can be sown in the holes formed on the grass surface by the aeration mechanism, there is an effect that new grass can be germinated in addition to the above-mentioned effects.

Preferably, the power transmission mechanism comprises a first transmission shaft, a first bevel gear, a second transmission shaft, a second bevel gear, a third bevel gear, a clutch member, including. First
, The rotational motion is transmitted from a power source. The first bevel gear is mounted on the first transmission shaft. The second transmission shaft transmits the rotational movement to the working shaft. The second bevel gear meshes with the first bevel gear and is arranged to be rotatable independently of rotation of the second transmission shaft. The third bevel gear is positioned so as to face the second bevel gear, meshes with the first bevel gear, and is rotatably arranged independently of the rotation of the second transmission shaft. The clutch member has a second bevel between the second and third bevel gears.
And is slidable with respect to the second transmission shaft. When the rotational motion of the second bevel gear is transmitted to the second transmission shaft via the clutch member, the second transmission shaft rotates in the first rotation direction. When the rotational movement of the third bevel gear is transmitted to the second transmission shaft via the clutch member, the second transmission shaft rotates in the second rotation direction. When neither of the rotational movements of the second and third bevel gears is transmitted to the second transmission shaft, the second transmission shaft idles.

In this case, the switching of the clutch member causes the second transmission shaft to rotate in the first direction, rotate in the second direction, or idle. As a result, the above three operations can be easily performed by switching the clutch member.

Preferably, rotational motion is transmitted from a drive shaft extending from a power source to the first transmission shaft, and the second transmission shaft transmits the rotational motion to the work shaft via a chain.

[0021] Preferably, the apparatus further includes an elevating mechanism capable of adjusting the depth of the blade biting into the lawn surface by adjusting the distance between the work axis and the lawn surface. In this case, by adjusting the depth at which the blade cuts into the lawn surface, an appropriate operation can be performed according to the type of the lawn, the growth state of the lawn, or the degree of reduction of the blade.

Also preferably, the body is towed by the tractor, and the power source is the tractor engine. In this case, two operations, that is, the operation of moving the main body by the tractor and the operation of rotating the operation shaft can be performed.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view of a lawn surface care device (birch slicer) according to Embodiment 1 of the present invention. Referring to FIG. 1, birch slicer 1 is towed by tractor 500. Birch slicer 1
Three link rods 501, 50 extending from the tractor 500
2 and 503. These three link rods 50
According to 1, 502 and 503, the birch slicer 1
It is towed by the so-called three-point link hitch method. One end of the link bar 501 is connected to the tractor 500, and the other end is rotatably connected to the upper part of the birch slicer 1. One end of the link rods 502 and 503 is connected to the tractor 500, and the other end is rotatably connected to the lower part of the birch slicer 1.

The birch slicer 1 includes a main frame 101.
Various members are attached to the device. On the upper part of the main body frame 101, an arch arm 1 is provided.
02 is attached. A link rod 501 is attached to the arch arm 102. Also, the main body frame 101
Is covered with a main body cover 126. The main body cover 126 plays a role of covering the entire upper part of the main body frame 101 and preventing various drive mechanisms mounted on the main body frame 101 from being exposed.

On the main body cover 126, a crank handle 217 for raising and lowering a predetermined blade and a rotary grip 305 for switching a clutch are provided. The crank handle 217 and the rotary grip 305
Can be rotated by a human.

On the side surface of the main body frame 101, a vertically long chain cover 210 is provided. In a portion surrounded by the chain cover 210, a chain that transmits power to a shaft that rotates a predetermined blade is provided. The chain cover 210 serves to prevent the chain from being exposed.

Next to the chain cover 210, a lock handle 229 extending in one direction is provided. The lock handle 229 serves to adjust the height of the blade and fix the height of the blade at that position. The lock handle 229 can be rotated by a human.

FIG. 2 is a side view of the birch slicer 1 shown in FIG. Referring to FIG. 2, the birch slicer 1 constitutes a main body, a chassis mechanism 100 to which various parts are attached, and is attached to the chassis mechanism 100,
It has an elevating mechanism 200 for raising and lowering the blade, a drive mechanism 300 for rotating the blade, and a power transmission mechanism 400 provided between the tractor and the drive mechanism 300 for switching the rotation direction of the blade.

The chassis mechanism 100 has a main body frame 101 as a main body. The main body frame 101 has a sheet metal structure for weight reduction, and is configured by sheet metal forming an iron plate.

A roller 114 is attached to the lower part of the main body frame 101 on the side close to the tractor. Further, a roller 109 is attached to a lower portion of the main body frame 101 and farther from the tractor. The roller 114 is rotatably mounted on a roller shaft 115, and the roller shaft 11
5 is attached to the main body frame 101. Roller 1
Reference numeral 14 is formed so as to extend from the near side of the drawing to the back and to be divided by a plane parallel to the drawing. Roller 1
The reason for dividing the roller 14 is to smoothly rotate the birch slicer 1 when the birch slicer 1 is pulled by the tractor and rotate. By dividing the roller 114, the inner ring difference during rotation can be absorbed. .

The roller 109 is rotatably mounted on a roller shaft 110 by a bearing (not shown in FIG. 2). The roller shaft 110 is mounted on the main body frame 101. Since rollers 109 and 114 support the weight of birch slicer 1, rollers 109 and 11
No. 4 is required to have enough strength to withstand this load.

A stay 132 connected to a link rod extending from the tractor is provided on a portion of the main frame 101 close to the tractor. There are two stays 132, one shown in FIG. 2 and one further on the back side (stay 133, not shown in FIG. 2). The stay 132 is connected to the link bar 502 shown in FIG. In stay 132,
An elongated hole for connection to the link rod 502 is provided, and a connecting pin is inserted into the elongated hole to be connected to the link rod 502. Since a force required to pull the birch slicer 1 is applied to the stay 132, the stay 132 is attached to the main body frame 101 by welding so as to withstand this force.

A main body cover 126 is provided so as to be in contact with the main body frame 101. The main body cover 126 is formed by sheet metal of an iron plate, and is shaped to cover a mechanism on the main body frame 101.

An arch arm 102 is attached to the body frame 101 at a portion near the tractor. The arch arm 102 has an arc shape, and the arch arm 102
Is protruded from the main body cover 126. The arch arm 102 has a tractor link rod 50.
A stay 131 to be connected to the device 1 is attached. An elongated hole is provided at the tip of the stay 131. A connecting pin is inserted into the elongated hole, and the tip of the link rod 501 is attached.

An elevating mechanism 200 for vertically moving a predetermined blade is provided with an arm 201 and a bearing plate 20.
6, bearings 202a and 202b, beam 212
, A shaft 231, and a crank handle 217.

The arm 201 has an "L" shape, and one end thereof is attached to the main body frame 101. One end of the arm 201 is mounted coaxially with the roller shaft 115,
It can rotate with respect to the main body frame 101. Arm 2
A bush (not shown in FIG. 2) for reducing friction generated at the time of rotation is provided between the main frame 101 and the main body frame 101. Therefore, the arm 201 can smoothly rotate around the roller shaft 115 within a predetermined range.

A bearing plate 206 is fixed to the center of the arm 201 by three hexagon bolts 208. The bearing plate 206 extends in a direction away from the arm 201. The arm 201 is made of a thick iron plate. The bearing plate 206 is made of a thick iron plate. The arm 20
Bearing away from 1 is a bearing (not shown in FIG. 2)
The shaft 317 is attached via the. A sprocket 320 is attached to the tip of the shaft 317.

Since the bearing plate 206 is fixed to the arm 201, when the arm 201 rotates about the roller shaft 115, the bearing plate 206 also rotates about the roller shaft 115.

At the lower part of the arm 201, bearings 202a and 202b are mounted. The bearings 202 a and 202 b have a divided structure, and the bearing 202 b located on the upper side is fixed to the arm 201. The bearing 202a located at the lower part is fixed to the bearing 202b by a hexagon bolt 203. Bearings 202a and 20
2b is fixed with a bearing (not shown in FIG. 2) therebetween. The outer race of this bearing is fixed by bearings 202a and 202b, and the inner race rotates together with a hexagon blade shaft 329 as a working shaft. Hex tool shaft 329
Is formed to extend from the front of the paper to the back,
Except for the end, it has a hexagonal prism shape. A plurality of blades 340 are attached to the hexagon blade shaft 329.

The other end of the arm 201 has an arm 201
A beam 212 is provided for moving the roller in the vertical direction and rotating the roller about the roller shaft 115. Beam 21
One end of 2 is rotatably attached to arm 201. The other end of the beam 212 is rotatably attached to a lifting nut 223 via a bracket 225. The other end of the arm 201 is fitted into a long hole 130 of the main body frame 101, and the arm 20 extends along the long hole 130.
The other end of one can move freely. Lifting nut 22
Reference numeral 3 denotes a female screw having a thread formed therein, which is screwed into a shaft 231 which is a male screw.

The beam 212 extends upward from the arm 201 toward the bracket 225, and extends near the bracket 225 from the near side of the drawing to the back. The beam 212 extends downward at its tip and is connected to another arm. This other arm is arm 201
And is symmetrically attached to the arm 201. The other end of this other arm is a roller shaft 11
5 is provided rotatably with respect to 5, and a central portion thereof is provided with a bearing for receiving the other end of the hexagon blade shaft 329. That is, the arm 201 and the bearing 20 shown in FIG.
2a, 202b, and a structure corresponding to the hexagonal bolt 203 also exist on the back side of the paper surface, and the hexagonal blade shaft 329 is positioned by these two bearings.

The shaft 231 is formed by a male screw.
The tip is attached to the crank handle 217. Therefore, turning the crank handle 217 clockwise moves the beam 212 and the arm 201 upward. Turning the crank handle 217 to the left turns beam 2
12 and the arm 201 move downward. Thus, the depth at which the blade 340 cuts into the grass surface can be adjusted.

The drive mechanism 300 has a shaft 317, sprockets 320 and 325, a chain 324, and a hexagon blade shaft 329. A sprocket 320 is attached to the outer periphery of the shaft 317. Sprocket 320
A chain 324 is provided so as to mesh with. Chain 324 also meshes with sprocket 325. The sprocket 325 is connected to the end of the hexagon blade shaft 329.

Rotational motion is transmitted to the drive mechanism 300 from an engine of a tractor as a power source. This rotational motion is transmitted through the power transmission mechanism 400 in the order of the shaft 317, the sprocket 320, the chain 324, the sprocket 325, the hexagon blade shaft 329, and the blade 340.

The power transmission mechanism 400 has an input shaft 415 as a first transmission shaft and a clutch switching shaft 424. The rotational motion transmitted to the input shaft 415 is
0 to the hexagonal cutter shaft 329. Power transmission mechanism 400 converts rotation of input shaft 415 into rotation in a first direction and rotation in a second direction. In order to convert the rotation, it is necessary to rotate the clutch switching shaft 424. By rotating the clutch switching plate 302 and the rotary grip 305 about the clutch switching shaft 424, the rotational motion from the power source is converted into a rotational motion in a first rotational direction and a rotational motion in a second rotational direction. be able to. The clutch switching plate 30
An index plunger 304 is provided at the center of 2.

The output shaft 415 is connected to the shaft 317 via a coupling mechanism. The output shaft 415 is
It is connected to the shaft 317. Therefore, when the input shaft 415 rotates, this rotational motion is transmitted to the shaft 317, the sprocket 3
20, the chain 324, the sprocket 325, and the hexagonal cutter shaft 329 are transmitted to the cutter 340.

FIG. 3 is a side view of the birch slicer 1 for explaining the operation of the lifting mechanism 200. Referring to FIG. 3, the parts drawn by solid lines are respectively located at the same positions as those shown in FIG. In this case, since the lawn surface is positioned so as to be in contact with the lower side of the rollers 109 and 114, the lower part of the blade 340 is positioned so as to bite into the lawn surface.
In this state, the slicing operation or the vertical operation is performed by rotating the blade 340 while pulling and moving the vertical slicer 1 in the direction indicated by the arrow A.

To reduce the bite of the blade 340 with respect to the lawn surface, the crank handle 217 is rotated rightward. Accordingly, the shaft 231 connected to the crank handle 217 also rotates clockwise. The shaft 213 has a male screw shape, and the female screw-shaped lifting nut 223 is screwed into the shaft 213.
It moves upward with the rotation of 31. Along with this, the beam 212 attached to the lifting nut 223 via the bracket 225 also moves upward. Since the arm 201 is attached to the tip of the beam 212, the arm 2
One end of 01 moves upward along the elongated hole 130.
On the other hand, since the other end of the arm 201 is attached to the main body frame 101 near the roller shaft 115, the roller shaft 1
The arm 201 rotates upward about the rotation center 15. Since the hexagon blade shaft 329 and the blade 340 are attached to the arm 201 via the bearings 202a and 202b, the blade 340 also rotates upward.

The lifting nut 223 is connected to the shaft 231.
, The lifting nut 223, the beam 212, the arm 201, and the blade 340 have moved to the positions indicated by the two-dot chain line. At this time, since the lower end of the blade 340 is located above the lower ends of the rollers 109 and 114, the lower end of the blade 340 does not cut into the grass surface.

When the operation is completed, the birch slicer 1 is lifted by the three-point hitch. As a result, the lower end of the blade 340 is separated from the lawn surface, and the birch slicer 1 is pulled by the tractor and moved to another place.

When starting a new operation, the suspended birch slicer 1 is lowered, and the blade 340 is brought into contact with the lawn surface. When it is desired to make the blade slightly bite into the surface of the lawn, the rotation speed of the crank handle 217 can be adjusted so that the blade 340 slightly bites into the lawn.

FIG. 4 is a top view as seen along the arrow IV line in FIG. In FIG. 4, the main body cover 126 shown in FIG.
Has been removed.

Referring to FIG. 4, three stays 131 to 133 are fixed to the end of main body frame 101. Connecting pins 124 and 125 for rotatably connecting the link rods of the tractor are attached to the stays 131 to 133, respectively. Each Stay 13
Numerals 1 to 133 are constituted by a pair of iron plates parallel to each other, and a connecting pin 1 is inserted into a long hole provided in each iron plate.
24 and 125 are inserted.

A substantially rectangular parallelepiped gear box 301 is mounted on the main body frame 101. In the gearbox 301, the rotational motion given by the tractor is
Power transmission mechanism 4 capable of switching between a rotational motion in a rotational direction of the rotational direction and a rotational motion in a second rotational direction opposite thereto.
00 is provided. The power transmission mechanism 400 includes a gear, a clutch, and a shaft. By combining these, it is possible to output two types of rotational movement in the rotational direction.

On the gear box 301, a clutch switching plate 302, an index plunger 304 and a rotary grip 305 are provided. The clutch switching plate 302, the index plunger 304, and the rotary grip 305 can be rotated around the clutch switching shaft 424 to a position indicated by a two-dot chain line.

An output shaft 405 as a second transmission shaft is provided so as to protrude from the gear box 301. The output shaft 405 is fixed to one end of the universal joint 310a. The other end of the universal joint 310b is fixed to one end of a joint hexagon shaft 313. The other end of the joint hex shaft 313 is inserted into one end of a hexagonal column-shaped hole of the joint hex sleeve 314. The other end of the joint hex sleeve 314 is connected to one end of the universal joint 310b. The other end of the universal joint 310b is connected to a sprocket 320 shown in FIG. 2 via a shaft (not shown in FIG. 4).
It is connected to the.

As described with reference to FIG. 3, the sprocket 320 rotates about the roller shaft 115, so that the other end of the universal joint 310b is connected to the roller shaft 11 as well.
5 is rotated. In order to cope with this rotation, two universal joints 310a and 310b are provided between the sprocket 320 and the output shaft 405. With the two universal joints 310a and 310b, the sprocket 320 allows the output shaft 405
From the direction in which the tractor extends, and about 13 ° in the direction away from the tractor. In addition, when the moving distance of the sprocket 320 increases, the
It is preferable to use a constant velocity joint. Further, since the sprocket 320 moves, the sprocket 320 and the output shaft 4
05 changes. In order to absorb the change in the distance, the joint hexagonal rod 313 is inserted into a hexagonal column-shaped hole inside the joint hexagonal sleeve 317.
Although not shown in FIG. 4, the universal joints 310a and 310b, the joint hexagon rod 313,
The joint hex sleeve 314 includes a sprocket 325
With the movement of, it also moves in the vertical direction (the direction from the back of the paper surface in FIG. 4 toward the front).

In the vicinity of the gear box 301, the lifting mechanism 2
00 and the lifting bracket 216 constituting the body frame 1
01. At the upper end of the lifting bracket 216, a crank handle 2 for rotating the shaft is provided.
17 are attached. A bracket 223 is rotatably attached to the shaft 231 via a lifting nut. The bracket 223 extends in one direction and is fixed to the symmetrical beam 212. Both ends of the beam 212 are provided so as to protrude from the main body frame 101. Under the beam 212, the arm 20 shown in FIG.
1 is rotatably attached to the main body frame 101.

A pair of mudguard shaft receivers 1 are provided at both ends of the rear end (part away from the tractor) of the main body frame 101.
05 is attached. A pair of mudguard shaft receivers 105
Supports two mudguard shafts 104 and 106. The mudguard shafts 104 and 106 are rollers 1
09 and serves to drop mud attached to the roller 109. Mudguard shafts 104 and 106
Is approximately 1 m in length.

FIG. 5 is a top view including a partial cross section of the gear box shown in FIG. Referring to FIG. 5, power transmission mechanism 400 includes an input shaft 415 as a first transmission shaft, a spiral bevel gear 414 as a first bevel gear fixed to the input shaft 415, and a second bevel gear 414. A spiral bevel gear 419 as a bevel gear, a spiral bevel gear 420 as a third bevel gear, a clutch 421 as a clutch member,
And an output shaft 405 as a second transmission shaft.

The input shaft 415 is rotatably attached to the gearbox 301. The bearing case 4 is located between the gearbox 301 and the input shaft 415.
17 is fixed to the gearbox 301. In the bearing case 401, a bearing 416 having a roller-shaped rolling element is provided. The inner race of the bearing 416 is mounted on the input shaft 415, and the outer race is mounted on the bearing case 417. Bearing case 4
A flange 434 and an oil seal 431 for preventing oil in the gear box 301 from leaking outside are provided between the input shaft 415 and the input shaft 415. The gearbox 301 is provided with a star-shaped window 402.

The output shaft 405 is rotatably attached to the gearbox 301. Between the gearbox 301 and the output shaft 405, flanges 403 and 404 are fixed to the gearbox 301. Flange 40
Through holes are formed in 3 and 404, and the output shaft 405 passes through the through holes. Flanges 403 and 4
Between the output shaft 04 and the output shaft 405, a bearing 407 having a roller-shaped rolling element is provided. A radial load is mainly applied to the bearing 407.

The output shaft 405 is a spiral bevel gear 419.
Penetrates. The spiral bevel gear 419 is connected to the output shaft 40.
It is possible to rotate independently of the 5 rotations.
A pair of bearings 409 is provided between the spiral bevel gear 419 and the output shaft 405. A collar 411 is attached to the output shaft 405 to maintain a distance between the pair of bearings 409. Spiral bevel gear 419
A bearing 408 having a ball-shaped rolling element is provided between the bearing and the bearing 407. Bearing 408
The distance between the inner race of the bearing 407 and the beveled bevel gear 419 is kept constant.

A spiral bevel gear 420 is provided so as to face the spiral bevel gear 419. An output shaft 405 is provided to pass through the spiral bevel gear 420. The spiral bevel gear 420 rotates similarly to the spiral bevel gear 419 irrespective of the rotation of the output shaft 405. A pair of bearings 410 is provided between the spiral bevel gear 420 and the output shaft 405. Collar 41 for maintaining the distance between a pair of bearings 410
2 is provided on the output shaft 405. Spiral bevel gear 42
A bearing 408 is provided between 0 and the inner race of the bearing 407. The presence of the bearing 408 allows the spiral bevel gear 420 and the bearing 4
The distance from the 07 inner race is kept almost constant.

An oil seal 406 is provided between the flange 404 and the output shaft 405. Also flange 4
A similar oil seal (not shown) is provided between the output shaft 03 and the output shaft 405.

A clutch 421 is positioned between the beveled bevel gears 419 and 420 arranged opposite to each other. The clutch 421 is provided with a through hole, and the output shaft 405 is inserted through the through hole.
Is located. Each of the output shaft 405 and the clutch 421 has a groove, and a sliding parallel key 426 in this groove is fitted.

Since a sliding parallel key 426 is provided between the clutch 421 and the output shaft 405, the clutch 4
21 rotates together with the output shaft 405. Further, the clutch 421 can slide on the output shaft 405 and slide along the direction in which the parallel key 426 extends. Therefore, the clutch 421 can move between the spiral bevel gear 419 and the spiral bevel gear 420.

When the clutch 421 moves to a position where the protrusion 421 a of the clutch 421 fits into the recess 419 a of the bevel gear 419, the rotational movement of the clutch 421 is transmitted to the bevel gear 419. In addition, when the clutch 421 moves while the projection 421a of the clutch 421 is engaged with the recess (not shown in FIG. 5) of the spiral bevel gear 420, the rotational movement of the clutch 421 is transmitted to the spiral bevel gear 420. The power transmission mechanism 40
At 0, spiral bevel gears are used as bevel gears to correspond to relatively high-speed rotation. However, when rotating at low speed, there is no need to use spiral bevel gears. Is also good.

FIG. 6 is a front view including a partial cross section of the gear box shown in FIG. Referring to FIG. 6, gearbox 301 is provided with a pair of flanges 403 and 404. The output shaft 40 extends through this flange.
5 are provided. Bearing 407 and oil seal 4 are provided between output shaft 405 and flanges 403 and 404.
06 is provided. The output shaft 405 is provided with a spiral bevel gear 419 so as to rotate independently of the rotation of the output shaft 405.
And 420 are attached. Spiral bevel gear 4
19 and a pair of bearings 409 between the output shaft 405.
Is provided. Spiral bevel gear 420 and output shaft 405
A pair of bearings 410 is provided between the pair. A bearing 408 is provided between the inner race of the bearing 407 and the spiral bevel gear 419,
The bevel gear 419 is positioned on the output shaft 405. Also, the spiral bevel gear 420 and the bearing 40
A bearing 408 is provided between the inner race 7 and the inner bevel 7, and the bevel gear 420 is positioned on the output shaft 405.

The output shaft 405 passes through the clutch 421. The groove 421b of the clutch 421 is
Outer race is fitted. This bearing 4
The 25 inner races are attached to one end of the eccentric plate 433. The other end of the eccentric plate 433 is attached to the clutch switching shaft 424. Therefore, when the clutch switching shaft 424 rotates, the clutch switching shaft 4
The bearing 425 rotates around the center 24. As a result, the clutch 421 into which the bearing 425 is fitted
Move between the spiral bevel gears 419 and 420.

Next, the operation of the power transmission mechanism shown in FIGS. 5 and 6 will be described. 7 to 9 are schematic diagrams for explaining the operation of the clutch. 7 to 9, the input shaft 415 is connected to the engine of the tractor via a predetermined joint. The input shaft 415 is connected to the spiral bevel gear 414. The spiral bevel gear 414 meshes with the spiral bevel gear 419. The spiral bevel gear 414 meshes with the spiral bevel gear 420 at a position facing the spiral bevel gear 419. The bevel gears 419 and 420 can rotate independently of the rotation of the output shaft 405. Spiral bevel gear 4
19 is provided with a through hole 419c. The spiral bevel gear 420 is provided with a through hole 420c. The output shaft 405 is mounted through these through holes 419c and 420c.

Between the spiral bevel gears 419 and 420, the output shaft 405 is slidable.
A clutch 421 that rotates together with the clutch 05 is mounted.

First, a method of rotating the output shaft 405 in the forward direction (first rotation direction) will be described. As shown in FIG. 7, the convex portion 421a of the clutch 421 is engaged with the concave portion a of the spiral bevel gear 419. The input shaft 415 is rotated in the direction indicated by the arrow 415b. The bevel gear 414 also rotates in the direction indicated by the arrow 415b. The spiral bevel gears 419 and 420 meshing with the spiral bevel gear 414 rotate in directions indicated by 419b and 420b, respectively. Spiral bevel gear 419 and clutch 4
Since the clutch 21 is engaged, the clutch 421 moves to the arrow 41
It rotates in the direction shown by 9b. Clutch 421 and output shaft 4
Since the output shaft 405 rotates in the same direction as 05, the output shaft 405 also rotates in the direction indicated by the arrow 419b as the first rotation direction.

Next, a method of rotating the output shaft 405 in the reverse direction (second rotation direction) will be described. Referring to FIG. 8, protrusion 421 a of clutch 421 is engaged with recess 420 a of spiral bevel gear 420. The input shaft 415 is rotated in the direction indicated by the arrow 415b. Spiral bevel gear 414 connected to input shaft 415 also rotates in the direction indicated by arrow 415b. The spiral bevel gear 419 meshing with the spiral bevel gear 414 rotates in a direction indicated by an arrow 419b. The spiral bevel gear 420 meshing with the spiral bevel gear 414 rotates in the direction indicated by the arrow 420b. Since the spiral bevel gear 420 and the clutch 421 are engaged, the clutch 421 rotates in the direction indicated by the arrow 420b. Since the clutch 421 and the output shaft 405 rotate in the same direction, the output shaft 405 rotates in the direction indicated by the arrow 420b as the second rotation direction. Thus, the output shaft 405 can be rotated in the reverse direction.

Next, a method of idling the output shaft 405 will be described. In order to cause the output shaft 405 to idle, the protrusion 421a of the clutch 421 is prevented from engaging with any of the recesses 419a and 420a as shown in FIG. When the input shaft 415 rotates in the direction indicated by the arrow 415b, the spiral bevel gear 419 rotates in the direction indicated by the arrow 419b, and the spiral bevel gear 420 rotates in the direction indicated by the arrow 420b. However, since the clutch 421 is not engaged with any of the bevel gears 419 and 420, the bevel gears 419 and 42 are not engaged.
Zero rotation is not transmitted to the output shaft 405. As a result, the output shaft 405 can idle.

Next, a method of moving the clutch will be described. 10 to 12 are schematic diagrams for explaining a method of moving the clutch. Referring to FIG.
First, when the clutch 421 is brought into contact with the spiral bevel gear 419, the rotary grip 305 is rotated about the clutch switching shaft 424 in a direction approaching the spiral bevel gear 419. As a result, the eccentric plate 433 rotates around the clutch switching shaft 424 in a direction approaching the bevel gear 419. Eccentric plate 43
A bearing 425 is attached to the distal end of 3, and this bearing is fitted in the groove 421 b in the clutch 421. Therefore, the clutch 421 also moves in a direction approaching the bevel gear 419. As a result, the convex portion 421a of the clutch 421 is turned and the bevel gear 419 is turned.
In the recess 419a. Spiral bevel gear 4
19 can be brought into contact with the clutch 421 to transmit the rotation of the bevel gear 419 to the output shaft 405.

Referring to FIG. 11, spiral bevel gear 42
In order to bring 0 and the clutch 421 into contact, the rotary grip 305 is rotated about the clutch switching shaft 424 in a direction approaching the bevel gear 420. This allows
The eccentric plate 433 attached to the clutch switching shaft 424 also rotates in a direction approaching the beveled bevel gear 420. A bearing 425 is attached to the tip of the eccentric plate 433. The bearing 425 is used for the clutch 42
1 is fitted in the groove 421b, so that the clutch 4
21 also moves in a direction approaching the bevel gear 420. As a result, the convex portion 421a of the clutch 421 fits into the concave portion 420a of the spiral bevel gear 420, and the rotational force of the spiral bevel gear 420 is transmitted to the drive shaft 405.

To idle the output shaft 405, the rotary grip 305 is rotated so as to be located between the bevel gears 419 and 420 as shown in FIG. Accordingly, the eccentric plate 433 attached to the clutch switching shaft 424 also rotates, and the bearing 425 attached to the tip of the eccentric plate 433 also turns the bevel gear 419.
And 420 are pivoted away from both. Since the bearing 425 is fitted in the groove 421 b of the clutch 421, the clutch 421 is also rotated by the bevel gear 41.
9 and 420. As a result, neither rotational force of the spiral bevel gears 419 and 420 is transmitted to the output shaft 405 via the clutch 421. As a result, the output shaft 405 can idle.

FIG. 13 is a side view including a cross section viewed along XIII-XIII in FIG. Referring to FIG. 13, a roller shaft 115 for supporting roller 114 is mounted on the side of body frame 101 near the tractor. Hex bolts 119 are provided at both ends of the roller shaft 115.
End plate 120 is attached. The end plate 120 contacts the arm 201 and plays a role of pressing the arm 201 against the main body frame 101. The diameter of the end plate 120 is
1 inner diameter.

A pair of bearings 116 is provided between the roller 114 and the roller shaft 115. Bearing 11
6, the roller 114 can freely rotate with respect to the roller shaft 115. Also, the roller 114
A collar 117 having a predetermined width is provided around the roller shaft 115 between the bearing 116 and the main body frame 101 in order to position the roller shaft 115. In addition, a collar 118 for maintaining a distance between the adjacent rollers 114 is provided around the roller shaft 115 between the adjacent rollers 114.

Bearing 202a attached to arm 201
A hexagonal cutter shaft 329 is located on the inner peripheral surface of the blade 202b. Hex tool shaft 329 and bearings 202a and 202
and bearings 328a and 328b are provided between the bearings 202a and 202b.
It is possible to rotate freely with respect to. Also, a hexagon bolt 323a is provided at each end of the hexagon blade shaft 329.
End plates 322a and 3
22b is attached. The hexagon bolts 323a and 323b are screwed into threaded holes provided at both ends of the hexagon blade shaft 329 and having thread. The diameter of the end plates 322 a and 322 b is larger than the inner diameter of the bearing 328.

A sprocket 325 is attached to one end of the hexagonal tool shaft 329. The sprocket 325 is attached to the tip of the hexagon blade shaft 329, and is fixed so as to rotate together with the hexagon blade shaft 329 by a predetermined parallel key. Hex bolt 322b is connected to hexagon knife shaft 329
The end plate 322b functions to press the sprocket 325 against the hexagonal cutter shaft 329 by screwing the sprocket into the screw groove. Thereby, the sprocket 32
5 can be prevented from coming off the hexagonal cutter shaft 329.

Arm 201 and bearings 202a and 2
Reference numeral 02b is rotatably attached to the beam 212 by a stopper screw 213. This beam 212
The lower end is attached to the arm 201, and the center of the upper end is connected to an elevating nut (not shown in FIG. 13) connected to the crank handle 217. A pair of stays 132 and 133 are provided on the front surface of the main body frame 101 at symmetrical positions.

FIG. 14 is a side view including a cross section taken along line XIV-XIV in FIG. Referring to FIG.
A plurality of blades 340 are attached to a hexagonal blade shaft 329 extending in one direction.
Is installed. The hexagonal cutter shaft 329 has a hexagonal column shape except for both end portions, and the hexagonal column shape portion is the blade 3.
It is inserted into 40 hexagonal holes. Adjacent knives 3
Between the blades 40, a blade collar 335 for maintaining a distance between the blades is provided.

Although the number of blades 340 is 30 in FIG. 14, the number of blades 340 is not limited to this and may be changed as appropriate. When increasing the number of blades 340, it is necessary to reduce the number of blade collars 335. When the number of the blades 340 is reduced, the number of the blade collars 335 needs to be increased. In FIG. 14,
Although the blades 340 are arranged at equal intervals, the intervals between the blades 340 do not necessarily need to be equal, and may be non-uniform.

At the end of the hexagonal cutter shaft 329, which is far from the sprocket 325, a collar 331 for preventing the cutter collar 335 and the cutter 340 from coming off the hexagonal cutter shaft 329 is provided. This color 3
One surface of 31 contacts blade collar 335. Also,
The other surface of the collar 331 is in contact with the split nut 332. The split nut 332 meshes with a screw thread provided at the end of the hexagonal cutter shaft 329 and is screwed into this screw thread. Therefore, by screwing the split nut 332 into the screw thread, it is possible to apply a compressive force along the direction in which the hexagonal cutter shaft 329 extends to the cutter collar 335 and the cutter 340 via the collar 331. The diameter of the split nut 332 can be reduced or expanded by a predetermined bolt. By reducing the diameter of the split nut 332 with a bolt, the split nut 332 is changed to a hexagonal tool shaft 329.
Can be fixed to the end.

Outside the split nut 332, a bearing 328a is provided around the hexagonal blade shaft 329.
The inner race of the bearing 328a is the hexagonal tool shaft 32
9 and the outer races are mounted on bearings 202a and 202a.
02b. Therefore, the hexagon blade shaft 329 can freely rotate with respect to the bearings 202a and 202b. A screw hole is provided on an end surface of the hexagon blade shaft 329, and a hexagon bolt 323a is screwed into the screw hole. Hex bolt 323a and hexagon tool shaft 32
9, an end plate 322a having a diameter larger than the inner diameter of the bearing 328a is provided. By screwing the hexagonal bolt 323a into the screw thread, the end plate 322a is pressed against the hexagonal blade shaft 329. Since the diameter of the end plate 322a is larger than the diameter of the bearing 328, it is possible to prevent the hexagon blade shaft 329 from coming off the bearing 328.

The other end of the hexagonal cutter shaft 329 is positioned with respect to the bearings 202a and 202b by a bearing 328b. A collar 327 is provided outside the bearing 328b. The sprocket 325 is brought into contact with the collar 327 by using a hexagonal tool shaft 329.
It is attached to the end. Sprocket 325 has teeth that mesh with chain 324. Sprocket 325
A parallel key is provided between the shaft 329 and the hexagonal cutter shaft 329, and the sprocket 325 and the hexagonal cutter shaft 329 are rotated by the parallel key. A screw hole is provided in the end surface of the hexagon blade shaft 329, and a hexagon bolt 323b is screwed into the screw hole. An end plate 322b having a diameter larger than the inner diameter of the sprocket 325 is provided between the hexagon blade shaft 329 and the hexagon bolt 323b.

By screwing the hexagonal screw 323b into the screw hole of the hexagonal knife shaft 329, the end plate 32
2b is pressed in the direction toward the hexagon blade axis 329. Since the inner diameter of the end plate 322b is larger than the inner diameter of the sprocket 325, the sprocket 325 does not come off from the hexagon blade shaft 329. Further, since the collar 327 exists between the sprocket 325 and the bearing 328, the sprocket 325 does not contact the bearing 328.

Chain 3 meshing with sprocket 325
24 meshes with another sprocket 320. The sprocket 320 has a through hole, and a predetermined shaft 317 is fitted into the through hole. A parallel key exists between the shaft 317 and the sprocket 320, and the parallel key rotates the sprocket 320 and the shaft 317 together. The inner race of the bearing 207 is attached to the outer periphery of the shaft 317. The outer race of the bearing 207 is attached to the bearing plate 206. Therefore, the shaft 317 can rotate with respect to the bearing plate 206.

A screw hole is formed on one end surface of the shaft 317, and a hexagon bolt 323c is screwed into the screw hole. Hex bolt 323c and sprocket 320
An end plate 322c is provided between the two. The diameter of the end plate 322c is larger than the inner diameter of the sprocket 320. The end plate 322c is pressed against the shaft 317 by screwing the hexagon bolt 323c into the screw hole of the shaft 317. Thereby, the sprocket 320 can be prevented from coming off the shaft 317.

The end of the shaft 317 is connected to one end of the universal joint 310b. The other end of the universal joint 310b is connected to the joint hexagonal sleeve 314. Joint Hex Sleeve 314
Has a hexagonal column-shaped hole, and a joint hexagonal rod 3
One end of 13 is fitted. The other end of the joint hex bar 313 is the universal joint 31.
0a is connected to one end. Universal joint 3
The other end of 10a is attached to output shaft 405. The output shaft 405 receives a rotational movement from an input shaft 415 provided to extend in a direction perpendicular to the main surface. An arch arm 102 is provided near the output shaft 405. The arch arm 102 is attached to the main body frame 101 with a hexagon bolt 103.

FIG. 15 is a side view including a cross section taken along line XV-XV in FIG. Referring to FIG. 15, a roller shaft 110 is attached to main body frame 101 on a side far from the tractor. Screw holes are provided on both end surfaces of the roller shaft 110, and hexagon bolts 113 are screwed into the screw holes. An inner race of a bearing 111 is attached to the roller shaft 110, and a roller 109 is attached to an outer race of the bearing 111. A predetermined collar 112 is provided between the inner race of the bearing 111 and the main body frame 101, and the collar 112 positions the roller 109.

FIGS. 16 to 22 are exploded perspective views of a birch slicer according to the present invention. Referring to FIG. 16, main body cover 126 overlaid on main body frame 101.
Is attached to the main body frame 101 by bolts 127. A mudguard rubber 121 is provided on the front of the main body frame 101.
And the mudguard rubber retainer 122 is attached. Also,
In the main body frame 101, the arm is attached by the end plate 120 and the hexagon bolt 119.

Referring to FIG. 17, an arch frame 102 is attached to main body frame 101 with hexagon bolts 103. A connecting pin 124 is attached to the stay at the tip of the arch frame 102, and a connecting pin 125 is attached to the stay of the main body frame 101.

Referring to FIG. 18, mudguard shaft receiver 105 is attached to main body frame 101 with hexagon bolts 108.
Is attached. The mudguard shaft receiver 105 positions the mudguard shaft 104. The mudguard shaft 106 is attached to the mudguard shaft receiver 105 with a hexagonal bolt 107. In the body frame 101,
A hexagon bolt 123 to be fitted to the mudguard rubber retainer 122 is attached. In the body frame 101,
Hex bolt 113 for positioning roller shaft 110
Is attached. A bearing 111 is mounted between the roller shaft 110 and the roller 109.
The collar 112 holds the distance between the body frame 101 and the body frame 101.

The main body frame 101 has a roller shaft 11 with a hexagon bolt 119 and an end plate 120.
5 is attached. A collar 117 is provided on the roller shaft 115. A bearing 116 for rotating the roller 114 is mounted inside the collar 117. Further, a collar 118 for maintaining a distance between the two rollers 114 is attached to the roller shaft 115.

Referring to FIG. 19, lifting bracket 216 is attached to main body frame 101 by hexagon bolt 227. An oilless bush 220 is attached to the upper end of the lifting bracket 216, and an oilless bush 221 is attached to the lower end. These oilless bushes 220 and 221
The two ends of the shaft 231 are fitted to each other. Shaft 2
A thread is provided on the thread 31, and a lifting nut 223 is screwed into the thread. A set collar 224 is attached to an upper portion of the shaft 231. The crank handle 217 is attached to the upper end of the shaft 231. The crank handle 217 is attached to the shaft 231 by a collar 218 and a hexagon bolt 219.

A bracket 225 is attached to the lifting nut 223. The beam 212 is attached to the bracket 225 with a hexagon bolt 226.

Referring to FIG. 20, beam 212 is attached to arm 201 by stopper screw 213, thick washer 214, and nut 215. Also, the arm 20
A lock handle 229 is attached to 1 with a washer 230 interposed. Hex bolt 2 on arm 201
03 mounts the bearing 202a. A hexagon bolt / nut 205 is attached to the arm 201.
A bush 204 is attached to the tip of the arm 201. A bearing plate 206 is attached to the arm 201 with a hexagon bolt 208 and a thick washer 209. The bearing 207 is attached to the hole of the bearing plate 206. A chain cover 210 covering the bearing plate 206 is attached to the bearing plate 206 with a hexagon bolt 211. The tip of the lock handle 229 is screwed into the T-nut 228.

Referring to FIG. 21, gear box 301 is attached to main body frame 101. Gearbox 30
A clutch switching plate 302 and a suspension bolt 303 are attached to a clutch switching shaft projecting from No. 1. An index plunger 304 and a rotary grip 305 are attached to the clutch switching plate 302. Also,
The horo set 326 is attached to the gear box 301. The gearbox 301 has a star window 30
7 is attached. Gearbox 301 is hex bolt 3
08, it is attached to the main body frame 101. Gearbox 301 is also attached to arch arm 102 by hex bolt 309. One end of the universal joint 310a is attached to the output shaft projecting from the gear box 301 by a strong set pin 311a. The universal joint 310a is a boot 312
a. The other end of the universal joint 301a is attached to the joint hexagon shaft 313 by a strong set pin 311a. The other end of the joint hex shaft 313 is inserted into a hexagonal column-shaped groove of the joint hex sleeve 314.

Referring to FIG. 22, a joint hex shaft 315 is attached to the other end of joint hex sleeve 314 by a pin 316. One end of the universal joint 310b is attached to the other end of the joint hexagon shaft 315 by a strong set pin 311b. The other end of the universal joint 310b has the shaft 31
7 is attached by a strong set pin 311b. Universal joint 310b is boot 312b
Covered by A collar 31 is attached to the other end of the shaft 317.
9 and the sprocket 320 are attached. A parallel key 318 is provided between the sprocket 320 and the shaft 317. The horo set 321 is attached to the sprocket 320. The shaft 31 for holding down the sprocket 321
7 and an end plate 322 using a hexagon bolt 323c.
c is attached.

The chain 324b is attached to the sprocket 320.
Are engaged. In addition, the chain 3
24 mesh. Sprocket 325 is a hexagonal tool shaft 32
9 at one end. Hex tool axis 329
The bearing 328b is fitted. Bearing 32
A collar 327 is provided between the sprocket 8b and the sprocket 325. The sprocket 325 uses a hexagonal bolt 323b and an end plate 322b to form a hexagonal tool shaft 329.
Attached to Further, the sprocket 325 is attached to the hexagonal blade shaft 329 by the horo set 326. A parallel key 330 is provided between the hexagon blade shaft 329 and the sprocket 325.

A collar 3 is provided on the other end of the hexagonal tool shaft 329.
31 is attached. A screw thread is provided at the other end of the hexagon blade shaft 329, and a split nut 332 having a screw hole is screwed into the screw thread. A cap bolt 333 is attached to the split nut, and the inner diameter of the split nut 332 can be reduced or increased. A bearing 328a is attached to the other end of the hexagon blade shaft 329. This bearing 328a is a hexagon bolt 32
3a and the end plate 322a, the hexagonal cutter shaft 32
9 is held.

FIG. 23 is a side view showing a blade used in the present invention. Referring to FIG. 23, a dedicated wrench 334 is used to attach the blade to the hexagon blade shaft. Knife color 3
Reference numeral 35 is provided between adjacent blades, and is used to set a predetermined interval between the blades.

The slicing blade 336 is used for slicing work, that is, for eliminating the water-impermeable layer (root zone) formed below the lawn surface, and has a hexagonal hole through which the hexagonal cutter shaft passes. Have. The slicing blade 336 is provided with three blades, and each blade decreases in width as it goes away from the center.

The vertical blade 337 is a blade for removing grass scum remaining between grasses. The vertical blade 337 is provided with a hexagonal hole through which the hexagonal cutter shaft passes. The five blades of the vertical blade 337 have such a shape that the width temporarily decreases as the distance from the center hole of the hexagonal shape increases, and the width increases at the tip end.

The spiking blade 338 is a blade used for aeration work, that is, for making a small hole in a lawn surface. At the center of the spiking blade 338, a through-hole for inserting a hexagonal cutter shaft is provided. The spiking blade 338 is provided with a plurality of small blades extending radially from the center.

To attach these cutters to the hexagonal cutter shaft, a hexagonal cutter shaft 329 shown in FIG.
And any one of the slicing blade 336, the vertical blade 337, and the spiking blade 338. At this time, the blade collar 335 and the above-mentioned blade are fitted alternately. To reduce the number of blades and increase the distance between the blades, the blade collar 3
Insert 35 more. When the distance between the blades is reduced, the number of blade collars 335 to be inserted is reduced.

A hexagonal cutter shaft 329 has a cutter collar 335, a slicing blade 336, and a vertical blade 337.
When any of the spiking blades 338 is attached, the collar 331 is attached to one end of the hexagonal tool shaft 329. Next, the split nut 332 is screwed into the thread at one end of the hexagonal tool shaft 329. By sufficiently screwing the split nut 332, the force for compressing the blade collar 335 and the blade inserted into the hexagon blade shaft 329 increases the split nut 33.
Given from 2. When the split nut 332 is sufficiently inserted, the cap bolt 333 is tightened. This allows
The inner diameter of the split nut 332 becomes smaller,
Is fixed to one end of the hexagonal cutter shaft 329. This prevents the blade from coming off the hexagon blade shaft 329. Then, the other end of the hexagonal tool shaft 329 is connected to the bearing 328b and the collar 3
27 and the sprocket 325, and these are fixed with the end plate 322b and the hexagon bolt 323b.

A bearing 328a is attached to one end of the hexagon blade shaft 329 with an end plate 322a and a hexagon nut 323a. Then, sprocket 325
The tool can be attached to the birch slicer by applying a chain to the sprocket 320 and the sprocket 320.

FIGS. 24 to 26 are perspective views of a hexagonal cutter shaft to which the cutter is attached in accordance with the above-described steps. Referring to FIG. 24, a plurality of slicing blades 336 are attached to hexagon blade shaft 329. A blade collar 335 is attached between the adjacent slicing blades 336. The slicing blade 336 has a rotating direction, and is attached to the hexagon blade shaft 329 so as to have a shape that digs a lawn surface.

Referring to FIG. 25, a plurality of vertical blades 337 are attached to hexagon blade shaft 329. A blade collar 335 is mounted between adjacent vertical blades 337. Since the vertical blade 337 has a symmetrical shape, the vertical blade 337 can be attached to the hexagonal tool shaft 329 without particularly considering the rotation direction.

Referring to FIG. 26, a plurality of spiking blades 338 are attached to hexagon blade shaft 329. A blade collar 335 is attached between the adjacent spiking blades 338. Since the spiking blade 338 also has a symmetrical shape, the spiking blade 338 can be attached to the hexagon blade shaft 329 without particularly considering the rotation direction.

In order to operate such a birch slicer 1, first, the link rods 501, 502 and 503 shown in FIG.
Attach 1, 132 and 133. Also, the tractor 5
The output shaft No. 00 and the input shaft 415 of the birch slicer 1 are connected by a joint.

When performing vertical work, first,
A hexagonal cutter shaft 329 to which a plurality of vertical blades 337 shown in FIG. 25 are attached is prepared. This hexagonal cutter shaft 32
9 is attached to bearings 202a and 202b of the birch slicer 1 via bearings 208a and 208b.
By adjusting the rotation of the crank handle 217,
The depth at which the vertical blade 337 cuts into the grass surface is adjusted. The rotary grip 305 is rotated toward the near side (the side approaching the sprockets 320 and 325) on the paper surface shown in FIG. As a result, the clutch 421 moves, and the clutch 4
21 has a convex portion 421a and the concave portion 4 of the bevel gear 419
Meshes with 19a. Rotation is applied from the output shaft of the tractor 500 to the input shaft 415 in the direction indicated by the arrow 415b. This rotation is transmitted to the output shaft 40 via the spiral bevel gear 414, the spiral bevel gear 419 and the clutch 421.
5 is transmitted.

The output shaft 405 rotates in the direction shown by the arrow 419b. The rotation of the output shaft 405 is transmitted to the sprocket 320 via the universal joint 310a, the joint hex bar 313, the joint hex sleeve 314, the joint hex shaft 315, the universal joint 310b, and the shaft 317. The rotation of the sprocket 320 causes the hexagonal cutter shaft 3 to rotate through the chain 324 and the sprocket 325.
It reaches to 29. Thereby, the vertical blade 337 is provided.
Rotates in the direction indicated by arrow B in FIG. In addition, the birch slicer 1 itself is pulled by the tractor and the arrow A in FIG.
Proceed in the direction indicated by. The vertical blade 337 rotates in a direction in which there is no resistance relative to the traveling direction of the vertical slicer 1. Thereby, the vertical blade 3
37 can remove swarf between grass.

Next, in order to perform a slicing operation, a hexagonal cutter shaft 329 to which a plurality of slicing blades 339 shown in FIG. 24 are attached is prepared. This hexagonal cutter shaft 3
29 are the bearings 202a and 202b of the birch slicer 1.
, Via bearings 208a and 208b. By appropriately rotating the crank handle 217, the depth at which the slicing blade 336 cuts into the grass surface is adjusted. Next, the rotary grip 307 is moved to the far side of the plane of FIG. 2 (the side away from the sprockets 320 and 325).
To rotate. Thereby, the convex portion 42 of the clutch 421
1a fits into the concave portion 420a of the spiral bevel gear 420. Arrow 4 from output shaft of tractor 500 to input shaft 415
A rotation in the direction shown by 15b is given. Thus, the rotation is transmitted to the output shaft 405 via the spiral bevel gear 414, the spiral bevel gear 420, and the clutch 421. Output shaft 405 rotates in the direction indicated by arrow 420b. From output shaft 405, universal joint 310a, joint hex bar 313, joint hex sleeve 314, joint hex bar 315, universal joint 310
b, shaft 317, sprocket 320, chain 324,
It is transmitted to the hexagonal cutter shaft 329 via the sprocket 325. The slicing blade 336 attached to the hexagon blade shaft 329 rotates in the direction indicated by the arrow C in FIG. At the same time, the birch slicer 1 is pulled by the tractor and moves in the direction indicated by the arrow A in FIG. In this case, the slicing blade 336 rotates in such a direction that the slicing blade 336 relatively resists the traveling direction of the birch slicer 1. Thereby, the slicing blade 336 can eliminate the impermeable layer.

To perform the aeration work, see FIG.
A hexagonal tool shaft 329 to which a plurality of spiking blades 338 as shown in FIG. The hexagonal cutter shaft 329 is connected to the bearings 202 a and 202 of the birch slicer 1.
b through bearings 328a and 328b. By adjusting the crank handle 217 appropriately, the depth at which the spiking blade 338 bites into the lawn surface is adjusted. The rotary grip 305 is rotated to the position shown in FIG.
As a result, as shown in FIG. 9, the convex portion 421a of the clutch 421 does not fit into any of the concave portion 419a of the spiral bevel gear 419 and the concave portion 420b of the spiral bevel gear 420. A rotation in the direction indicated by arrow 415b is provided from the output shaft of the tractor to the input shaft 415. This allows
The spiral bevel gears 414, 419 and 420 rotate, but since the spiral bevel gears 419 and 420 are not engaged with the clutch 421, this rotational force is applied to the output shaft 4
It is not transmitted to 05. When the birch slicer 1 is pulled in the direction indicated by the arrow A shown in FIG. 2 in this state, the spiking blade 338 bites into the lawn surface, so that the spiking blade 338 is slowly indicated by the arrow B as the birch slicer 1 advances. Rotate in the direction (idling). Thereby, an aeration operation can be performed by making a hole in the lawn surface.

As described above, in the birch slicer according to the present invention, one machine can perform three functions by switching the clutch and replacing the blade, so that it can be performed much more than when three machines are prepared. In addition, the maintenance cost of the apparatus can be reduced.

Further, a bevel gear and a clutch are used as a method of changing the rotational direction of the rotational motion given from the tractor. However, the mechanism for changing the rotational direction is not limited to this, and a hydraulic transmission (hydrostatic Type transmission) or the like.

Further, the height of the blade is adjusted by using a screw as the elevating mechanism. However, the invention is not limited to this, and another mechanism such as a ratchet mechanism may be used.

Further, although the tractor engine is used as the power source, the power source is not limited to this, and another engine may be used. Also, as the towing means, it is possible to tow with a normal car or the like instead of the tractor.

(Embodiment 2) FIG. 27 is a perspective view of a lawn surface care device according to Embodiment 2 of the present invention. The seeding mechanism 600 is attached to the birch slicer 1 shown in FIG. The seeding mechanism 600 includes a container 601 for storing lawn seeds, a lid 602 provided on the container 601, and a tire 610 rotatably attached to the container 601.

A lawn seed is put in the container 601, and the container 601 is covered with a lid 602 to prevent foreign matter from entering the seed. The lid 602 and the container 601 are attached by hinges 607 and 608. Seeding mechanism 6
The container 601 is attached to the main frame 101 of the birch slicer 1 by stays 604 and 606. The container 601 has stays 603 and 6
05 is attached to the main body cover 126 of the birch slicer 1.

[0127] Tires 610 are attached to both ends of the container 601. A hole is provided below the container 601,
Lawn seeds fall onto the lawn surface from this hole. When the container 601 is lifted together with the birch slicer 1, the hole is closed, and when the container 601 is placed on the grass surface together with the birch slicer 1, the hole is opened.

In the case of sowing a lawn on the lawn using the normal sowing mechanism 600, it is preferable to sow the hole in the lawn surface while making a hole in the lawn with the spiking blade described in the first embodiment.

In the birch slicer 1 having such a seeding mechanism, a hole can be made in the lawn and the seed can be sowed there, so that the seed can be sowed efficiently on the lawn surface.

The use of a birch slicer having such a seeding mechanism makes it possible to efficiently operate a golf course or the like. Conventionally, lawns have been variously bred. For example, varieties have been cultivated to be evergreen, resistant to humidity, resistant to drying, resistant to diseases and resistant to chemical damage. However, as the growth progresses, a phenomenon occurs in which the ancestors return to their ancestors, that is, return to the varieties before improvement. As a result, for example, there is a brown portion on the lawn surface that has been breeded to be evergreen, and the lawn surface becomes mottled. To prevent this, the lawn surface has been replanted in the past,
At a golf course with two greens, the business was operated on one green, and the other greens were waiting for the growth of turf, which led to poor business efficiency.

According to the present invention, by sowing seeds (overseeding) at the time of opening a golf course and changing the grass surface between old and new, even one green, for example, an evergreen turf can be maintained, and the operating efficiency can be improved. Can be improved. If you just sow the seeds, the seeds will be blown off by rain and wind,
Since seeds do not germinate even when planted in a deep part, it is preferable to sow the seed in a part having a depth of about 5 mm from the surface of the lawn. Also, in order to give the turf genetic diversity,
It is also possible to overseed different compatible varieties of seeds.

The embodiments disclosed this time must be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0133]

According to the present invention, it is possible to provide a lawn surface care device (vertical slicer) capable of performing a vertical operation and a slicing operation by one unit.

Further, according to the present invention, it is possible to provide a lawn surface care device (vertical slicer) capable of performing vertical work, slicing work and aeration work by one unit.

Further, according to the present invention, it is possible to provide a vertical slicer capable of performing a vertical operation, a slicing operation, an aeration operation, and a seeding operation by one unit.

[Brief description of the drawings]

FIG. 1 is a perspective view of a birch slicer according to Embodiment 1 of the present invention.

FIG. 2 is a side view of the birch slicer shown in FIG.

FIG. 3 is a side view of a birch slicer for explaining an operation of a lifting mechanism.

FIG. 4 is a top view as seen along the arrow IV line in FIG. 2;

FIG. 5 is a top view including a partial cross section of the gearbox shown in FIG. 4;

FIG. 6 is a front view showing a partial cross section of the gearbox shown in FIG. 4;

FIG. 7 is a schematic diagram for explaining an operation according to one aspect of the clutch.

FIG. 8 is a schematic diagram for explaining an operation according to another aspect of the clutch.

FIG. 9 is a schematic diagram for explaining an operation of the clutch according to still another aspect.

FIG. 10 is a schematic diagram according to one aspect for describing a method of moving a clutch.

FIG. 11 is a schematic diagram according to another aspect for describing a method of moving the clutch.

FIG. 12 is a schematic diagram according to yet another aspect for explaining a method of moving a clutch.

FIG. 13 is a side view including a cross section viewed along line XIII-XIII in FIG. 2;

FIG. 14 is a side view including a cross-section taken along line XIV-XIV in FIG. 2;

FIG. 15 is a side view including a cross section viewed along the line XV-XV in FIG. 2;

FIG. 16 is an exploded perspective view of a part of the chassis mechanism.

FIG. 17 is an exploded perspective view of another portion of the chassis mechanism.

FIG. 18 is an exploded perspective view of still another portion of the chassis mechanism.

FIG. 19 is an exploded perspective view of a part of the lifting mechanism.

FIG. 20 is an exploded perspective view of another part of the lifting mechanism.

FIG. 21 is an exploded perspective view of a part of the drive mechanism.

FIG. 22 is an exploded perspective view of another portion of the drive mechanism.

FIG. 23 is a side view showing a blade used in the present invention.

FIG. 24 is a perspective view of a hexagonal cutter shaft to which a plurality of slicing blades are attached.

FIG. 25 is a perspective view of a hexagonal cutter shaft to which a plurality of vertical blades are attached.

FIG. 26 is a perspective view of a hexagon blade shaft to which a plurality of spiking blades are attached.

FIG. 27 is a perspective view of a birch slicer according to Embodiment 2 of the present invention.

[Explanation of symbols]

1 Birch slicer, 101 body frame, 200
Elevating mechanism, 329 hexagon blade axis, 336 slicing blade, 337 vertical blade, 338 spiking blade, 400 power transmission mechanism, 405 output shaft, 414, 419, 420 Spiral bevel gear, 4
15. Input shaft, 421 clutch, 600 seeding mechanism.

Claims (9)

[Claims] 1. A main body, and converts a rotational motion inputted from a power source into a rotational motion in a first rotational direction and a rotational motion in a second rotational direction opposite to the first rotational direction and outputs the converted rotational motion. A power transmission mechanism attached to the main body, and a work shaft rotatably mounted on the main body in accordance with an output of the power transmission mechanism, and to which a blade for cutting a lawn surface can be attached. And a lawn surface care device. 2. A body in a predetermined direction while rotating the work shaft in a first rotation direction in a state where a first blade is attached to the work shaft and the first blade is in contact with a lawn surface. Performing a first work by moving the work shaft while rotating the work shaft in a second rotation direction in a state where a second blade is attached to the work shaft and the second blade is in contact with a lawn surface; The lawn surface care device according to claim 1, wherein the second operation is performed by moving the main body in a predetermined direction. 3. The first operation is performed in a first rotation direction that does not cause a resistance relatively to a movement direction of the main body.
Is a vertical operation for removing swarf between grasses with the first blade by rotating the blade of the first blade, and the second operation is a second operation that is relatively resistant to the moving direction of the main body. 3. A slicing operation in which the second blade is rotated in a rotation direction to eliminate an impermeable layer formed below a grass surface with the second blade.
The lawn surface care device according to 1. 4. The power transmission mechanism is capable of idling the work shaft without transmitting the rotational motion input from a power source to the work shaft, and attaching a third blade to the work shaft. 4. An aeration operation for perforating a lawn surface by moving the main body in a predetermined direction while idling the work shaft while the third cutting tool is in contact with the lawn surface. Lawn surface care device as described. 5. The lawn surface care device according to claim 4, further comprising a seeding mechanism connected to the main body, wherein the seeding mechanism performs seeding while performing aeration work. 6. The power transmission mechanism, wherein: a first transmission shaft to which rotational motion is transmitted from a power source; a first bevel gear attached to the first transmission shaft; , A second bevel gear that meshes with the first bevel gear, and is rotatably arranged independently of the rotation of the second bevel gear, and faces the second bevel gear. A third bevel gear that is positioned in such a manner as to mesh with the first bevel gear and to be rotatable independently of the rotation of the second transmission shaft; and between the second and third bevel gear. A clutch member rotatable with the second transmission shaft and slidably provided with respect to the second transmission shaft, wherein the rotational movement of the second bevel gear is performed via the clutch member. When transmitted to the second transmission shaft, the second transmission shaft rotates in the first rotation direction. When the rotational motion of the third bevel gear is transmitted to the second transmission shaft via the clutch member, the second transmission shaft rotates in a second rotational direction; The lawn surface according to any one of claims 1 to 5, wherein the second transmission shaft idles when neither of the rotational motions of the second and third bevel gears is transmitted to the second transmission shaft. Care device. 7. The rotary shaft according to claim 6, wherein a rotational motion is transmitted from a drive shaft extending from a power source to the first transmission shaft, and the second transmission shaft transmits the rotational motion to the work shaft via a chain. Lawn surface care device as described. 8. The apparatus according to claim 1, further comprising an elevating mechanism capable of adjusting a depth at which the blade bites into the lawn surface by adjusting a distance between the work axis and the lawn surface. The lawn surface care device according to claim 1. 9. The lawn care device according to claim 1, wherein the body is towed by a tractor, and the power source is an engine of the tractor.