JPH04144602A - Machine for renewal of lawn - Google Patents

Abstract

PURPOSE:To enable reduction of traction force and to miniturize the subject machine for renewal of lawns in a golf course by elevatably and shakably attaching an excavation rod equipped with a chisel having an excavation cutter blade and a grooving cutter blade at the lower end part to a frame drawn by a vehicle so that the excavation rod may be reciprocatively shaken by an eccentric cam in the direction perpendicular to the axis of shaking. CONSTITUTION:A traction vehicle 1 is coupled to a machine 2 for renewal and an input shaft 28 is engaged with the end part of a diving shaft 27 of the traction vehicle 1 to move the machine. When the input shaft 28 is rotated by a function of the driving shaft 27, a connecting rod 46 is forced to reciprocatively move in the direction of the arrow mark (A) by a belt 36. Following this movement, a shaking arm 26, a blanket 25, a sleeve 11 and an excavation rod 9 are forced to reciprocatively oscillate in the direction of the double-head arrow mark (B) with an amplitude depending on the eccentricity of an eccentric cam 43. Accordingly, the chisel 18 also is forced to reciprocatively oscillate in the direction of (B). Excavation and grooving are carried out by the excavation cutter blade 14 and the grooving cutter blade 16 during forward movement and no work is carried out during backward movement. The chisel is actuated in harmony with running of the vehicle, thus enabling the objective reduction of resistance.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a method for cutting grass roots and creating drainage ditches at the same time on vast lawns such as golf course fairways and sports grounds. This invention relates to improvements to lawn renewing machines that aim to update the lawn and improve drainage performance.

[Prior Art] When a vast lawn such as a golf course fairway or sports ground has been compacted and the grass grows poorly and has poor drainage, a device for renewing the lawn is as follows:
Special Publication No. 57-3321 and Special Publication No. 5B-5804
A subsoiler as shown in Publication No. 2 is known, but the cutting resistance of the chisel during operation is large, requiring a strong traction force from a large vehicle, and the subsoiler itself has to be large and rigid. Ta.

[Problems to be Solved by the Invention] The present invention provides a lawn renewal machine that reduces cutting resistance when cutting roots with a chisel and opening drainage ditches, can operate with a relatively small traction force, and has a compact structure. This is the issue.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the invention of claim 1 includes a flat root cutting blade and an inverted triangular cross section that protrudes downward from the root cutting blade. A plurality of root-cutting rods having a chisel at the lower end consisting of a groove-cutting blade are pivotally attached to the frame by a swing shaft, and the root-cutting rods have a function that allows the chisel to be located in the ground. An elevating device is attached that guides the chisel to two positions: a position and a non-operating position where the chisel is located above the ground surface, and the root cutting rod is actively driven with the direction of movement perpendicular to the swing axis thereof. The eccentric cam is connected to the towing vehicle by a connecting rod, and the frame is connected to the vehicle. The eccentric cam is connected to the end of the drive shaft, and in the third aspect of the invention, the eccentric cam is connected to the drive motor fixed to the frame of the renewal machine.

[Operation] According to the invention of Claim 1J1, the root cutting rod is reciprocated in a direction perpendicular to the swing axis of the rod with an amplitude determined by the degree of eccentricity of the eccentric cam. The chisel, which consists of a root-cutting blade and a groove-cutting blade at the lower end of the rod, performs root-cutting and groove-cutting during the forward movement of the above-mentioned amplitude, and by combining this movement with the forward movement caused by the running of the towing vehicle, the chisel cuts the root and grooves. The cutting resistance when cutting and trenching is reduced, and the lawn can be renewed quickly.The reduced cutting resistance also makes it possible to reduce the required traction force and downsize the device.

The root cutting blade has a flat plate shape, and cuts roots while being actively swung back and forth at a constant amplitude.Therefore, there is no unreasonable forceful running of the chisel underground, which prevents bulges on the lawn surface. No roughness occurs, and there is almost no need to tamp down the lawn surface after cutting the roots.

In addition, since the groove cutting blade with a triangular cross section is made to protrude below the flat plate-shaped root cutting blade, a series of small grooves are simultaneously cut in the root cutting part, and these small grooves are the vertical path of the root cutting rod. Since it communicates with the groove to form a drainage ditch, even if the lawn becomes viscous, it can be drained quickly.

According to the invention set forth in claim 2, the chisel can be vibrated by using the spare horsepower of the towing vehicle caused by the reduction in cutting resistance as described above, and according to the invention set forth in claim 3, It can be used simply by connecting it to an existing towing vehicle or lawn renewal machine.

[Example] Figures 341 to 5 show an example of implementing the invention of claims 341 and 2, in which a lawn lawn mower is connected and towed by a towing vehicle 1 such as a tractor (not shown). The renewal machine 2 consists of a frame 3 and a frame 5 connected by a vertically movable connector 4, on which the frame 3 is pivotally supported a running wheel 6 and a plurality of groove cutting disks 7 of approximately boat shape. A traveling wheel 8 and a plurality of root cutting rods 9 are pivotally supported on the shaft 5 .

As shown in FIGS. 1, 2, and 5, a plurality of root-cutting rods 9 are provided on sleeves 11 that are rotatably fitted on both left and right sides of the swing shaft 10, and in the illustrated example, two on the left and right sides. Books are fixed facing in the same direction, and at the bottom of each root cutting rod 9,
A chisel main rod 12 is inserted so that its position can be adjusted and fixed in the vertical direction.

The chisel main rod 12 has a flat cross section and is shaped like a boat shave that is long in the front-rear direction of the frame 5, and is configured so that the front edge 13 can cut the lawn in the vertical direction. Chisel main rod 1
At the lower end of 2, a flat root cutting blade 14 extending in a substantially horizontal direction is provided.
is fixed, and the front edge 15 of this root cutting blade 14 is used as a cutting edge.

A groove cutting blade 16 that projects downward is fixed to the center of the lower surface of the root cutting blade 14. The groove cutting blade 16 has an inverted triangular cross section that extends along the root cutting blade 14 in the length direction of the frame 5, and the tip portion 17 has a cutting blade shape.

The chisel main rod 12, root cutting blade 14, and groove cutting blade 16 described above constitute a chisel 18.

The swing shaft 10 is fixed to brackets 19 at both left and right ends, and a guide rod 20 is fixed to the frame 5, the front part being in a low position and the rear part being in a high position.
The bracket 19 is slidably fitted onto the guide rod 20.

The end of a piston rod 23 of a fluid pressure cylinder 22 rotatably supported by a shaft 21 on the frame 5 is connected to the swing shaft 10 between the sleeves 11 via a buffer spring 24. As the piston rod 23 moves forward and backward, the bracket 19 fixed to both ends of the swing shaft 10 is guided by the guide rod 20 and slides up and down, and this up and down movement causes the sleeve 11 and the root cutting rod 9 to It can be raised and lowered between an active position shown by a solid line in FIG. 1 and a non-active position above the ground surface G shown by a two-dot chain line 109. The aforementioned fluid pressure cylinder 22 and piston rod 23 constitute a lifting device.

As shown in FIGS. 2 and 5, the left and right sleeves 11 are integrally connected by a gate-shaped bracket 25, from which a swinging arm 26 projects upward.

An input shaft 28 coupled to a drive shaft end 27 of a towing vehicle 1 such as a tractor and a speed increaser 29 are disposed on the frame 3 which is connected to the frame 5 by a connector 4. Belt pulley 32.3 fixed to output shaft 30.31
belt 36.37 between 3 and passive pulley 34.35
The stake has been passed.

The rotating shaft 38. of the passive pulley 34.35 is fixed.
Eccentric cams 43, 44, 45, which are eccentric cam wheels, have short shafts 40, 41, 42 protruding from eccentric positions at the shaft ends of 39.
is fixed, and the other end of the connecting rod 46, 47, 48, which is rotatably fitted to the short shafts 40, 41, 42, is rotatably fitted to the swinging arm 26 of the bracket 25. There is.

2, as the input shaft 28 rotates, the connecting rod 46,
47 and 48 are reciprocated in the direction shown by the double arrow A in FIG.
In addition, the root cutting rod 11 is reciprocated in the direction of the double arrow B, and the chisel 18 is also rocked in the direction of the double arrow B.

Further, the plurality of grooving disks 7 supported by the frame 3 are positioned in the same perpendicular plane as the root cutting rod 9, and are rotatably supported by the support arm 49 around a shaft 5o. Support arm 4
9 is rotatably supported on the frame 3 by a shaft 51.

A tension spring 53 is stretched between the upper end of the support arm 49 and the upper frame 52 of the frame 3, and constantly applies a rotation force in the direction shown by arrow C to the groove cutting disk 7.

The support arm 49 and the grooving disk 7 are operated by a hydraulic cylinder/piston device (not shown) or the like, and are placed in an active position shown by a solid line in FIG. It is swung between two positions in the direction shown by the double arrow.

As shown in FIG. 11, the belts 36 and 37 have tension springs 54 stretched between them and the frame 3.
A tension pulley 55 is engaged, and a tension adjustment bolt device 56 is engaged with the bow tension spring 53 of the support arm 49.

In this embodiment, the root cutting 9 is strongly swung in the direction of the double arrow B by the rotation of the eccentric cam 43, so the chisel 18 positioned in the lawn is also swung in the direction of the double arrow B.
The grass roots are easily cut in a substantially horizontal direction, and a groove is cut below the cut portion with the groove cutting blade.

Before the lawn renewal work, the chisel 18, which had been held at the position indicated by the two-dot chain line 109 in FIG. When the renewal machine 2 is driven by the towing vehicle 1, the chisel 18 gradually digs into the grass, and at the approach end of the piston rod 23, the attachment of the chisel rod 12 to the root break 9 is at a fixed depth determined by the position. It is held in place, and as it travels, roots are cut and grooves are cut.

In the case of the illustrated example, the chisel main rod 12 passes through the vertical groove cut by the groove cutting disk 7 placed in front of the root cutting 9.
The cutting resistance generated in the root cutting 9 is due to the cutting of the grass root by the root cutting blade 14 that constitutes the chisel 18 and the groove cutting blade! The resistance is mainly due to the two actions of cutting the groove by the cutting tool 6, and as described above, the cutting is caused by the reciprocating rocking of the root cutting tool 9.

Since cutting is carried out, the cutting forces which influence the traction force remain at a small value.

In the embodiment shown in FIGS. 1 to 5, one frame 3
On the other hand, three frames 5 are connected in parallel by a connector 4, and each frame 5 is equipped with the various devices described above.
The present invention is not limited to such embodiments.

6, 7, and 8 are examples of implementation of the invention of claim 3, in which a plurality of chisel main rods, in the illustrated example, two chisel main rods 57.5B on the left and right are connected. They are connected together by a rod 59, and each chisel main rod 57, 58 has a root cutting 60,
A piston rod 65 of a fluid pressure cylinder 64 forming an elevating device is inserted into the connecting rod 59 so as to be vertically slidable in the guide grooves 62 and 63 of the shaft 61.
They are joined by 6.

The aforementioned fluid pressure cylinder 64 is connected to the rotating shaft 6 of the frame 67.
The shaft 1 is supported by a bracket 70 of a sleeve 69 which is rotatably fitted to the outside of the sleeve 69, and the root cut 6061 is fixed to the sleeve 69.

A swing arm 72 is erected on the sleeve 69, and an eccentric shaft 76 of a drive disk 75, which is an eccentric cam, is fixed to an output shaft 74 of a drive motor 73 fixed to the frame 67.
A link 77, which engages with the pivot arm 72, is engaged with the pivot arm 72 at a shaft 78.

A chisel 81 consisting of a flat root cutting blade 79 and a groove cutting blade 80 is fixed to the lower end of the chisel main rod 57, as in the embodiment shown in FIG.

In this embodiment, as the piston rod 65 of the fluid pressure cylinder 64 moves up and down in the direction of the double arrow E, the chisel 81 moves toward the ground surface.
The depth of the root cutting position within the lawn is also adjusted.

When the drive motor 73 is rotated, the swing arm 7 is rotated by the reciprocating movement of the link 77 as the drive disk 75, which is an eccentric cam, rotates.
2 is swung in the direction of the double arrow F, and the chisel 81 is also swung in the direction of the double arrow H, thereby cutting roots and cutting grooves in the same manner as in the embodiment shown in FIG.

Each of the embodiments described above has a flat root cutting blade 14.
79 and the groove cutting blades 16 and 80 on the lower surface are swung back and forth to cut the roots and cut the grooves, so there is almost no bulging on the lawn surface, and the lawn surface can be flattened after work. Although it is not necessary, a pressure roller may be placed behind the running wheels 8 shown in FIG. 1 and may be pulled at the same time.

[Effect] In the invention of claim 1, the root cutting rod is swung in the direction orthogonal to the swing axis with an amplitude determined by the eccentricity of the eccentric cam, so that the root cutting edge and the groove are A chisel including a cutting blade is
Since root cutting and groove opening are performed during forward movement, the cutting resistance acting on the traction force of the towing vehicle can be significantly reduced, saving labor for traction force. Since the rigidity of each part is small compared to the function it performs, it has the effect of reducing the size of the device.

In addition, the root cutting blade has a flat plate shape and performs root cutting while being actively swung back and forth with a constant amplitude.A groove cutting blade is placed on the underside of the root cutting blade, so it can be cut underground. The operation of the chisel does not cause bulges or roughness on the lawn surface, and there is also the effect that there is almost no need for compaction work after work.Moreover, a series of small grooves are cut in the root cutting area, and these grooves Since it communicates with the vertical groove that is the running path, it also has the effect of significantly improving the drainage of the lawn.

In addition to the above-mentioned effects, the invention as claimed in claim 2 has the effect of making effective use of the engine output because the chisel is oscillated by the excess horsepower of the towing vehicle produced by the reduction in cutting resistance.

Further, according to the invention set forth in claim 3, the effect can be obtained by simply connecting it to an existing towing vehicle or lawn renewal machine.

[Brief explanation of the drawing]

1 to 5 show an example of the implementation of the invention according to claims 1 and 2, and the 'tS1 diagram is
A vertical cross-sectional view at a position corresponding to line I-I in FIG. 2, FIG. 2 is a half-cut plan view, and FIG. 3 is a schematic front view of what is shown in FIG. 1.
Figure 4 is a cross-sectional view of the rV-rV line in the IT figure; Figure s5 is a cross-sectional view showing only the main parts along the V-V line in Figure 1; N6
The figure is a half-cut plan view of only the main part of an example of implementation of the invention of claim 's3, FIG. 7 is a sectional view taken along the line ■-■ in FIG. 6,
FIG. 8 is a sectional view taken along the line ■--■ in FIG. 6. 1 Traction vehicle, 5: Frame, 9: Root cutting rod, 10: Swing shaft, 14: Root cutting blade, 16: Groove cutting blade, 22: Cylinder serving as a lifting device, 23: Piston rod serving as a lifting device, 27: Drive Shaft end, 43° 44.45: Eccentric cam, 46, 47, 4
8: Connecting rod, 73: Drive motor. Figure 1? 9

Claims (1)

[Scope of Claims] 1. A plurality of root cutting rods each having a chisel at the lower end consisting of a flat root cutting blade and a groove cutting blade with an inverted triangular cross section projecting downward from the root cutting blade are attached to a frame. The chisel is rotatably mounted on a swing shaft, and the root cutting rod is guided to two positions: a working position where the chisel is located underground, and a non-working position where the chisel is located above the ground surface. A lifting device is attached, and the root cutting rod is connected by a connecting rod to an eccentric cam that is actively driven with the swing direction perpendicular to the swing axis thereof, and the frame is connected to the vehicle. lawn renewal machine. 2. The lawn renewal machine according to claim 1, wherein the eccentric cam is connected to the end of the drive shaft of the vehicle by a transmission mechanism. 3. The lawn renewal machine of claim 1, wherein the eccentric cam is coupled to a drive motor on the frame.