JPS63177732A - Portable reaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a portable brush cutter.

, (Prior Art) A portable brush cutter is equipped with a transmission case at the tip of the brush cutter body, and a cutting blade body that rotates around a vertical axis is provided below the transmission case. A device in which a dish-shaped grounding body is provided below the center of the body is well known, such as in Japanese Utility Model Publication No. 39-35976.

(Problem to be Solved by the Invention) This type of brush cutter has a rotating cutting blade body that rotates while swinging the cutting blade side from side to side with the band of the brush cutter body hung on the shoulder of the operator. Weeds and the like are harvested by this method. However, in the past, the grounding body was only provided at the lower center of the cutting blade, so the worker supported the weight of the cutting machine and balanced it so that the grounding body was close to or in sliding contact with the ground during work. Therefore, it is very difficult to use.
In addition, the fatigue level was extremely high during long hours of work.

SUMMARY OF THE INVENTION In view of these conventional problems, it is an object of the present invention to enable an operator to work efficiently without having to support the weight of a cutting machine.

(Means for Solving Problems) The present invention provides a portable brush cutter in which a cutting blade body 13 that rotates around a vertical axis is provided at the tip of a brush cutter main body 1, and the present invention provides a portable brush cutter that has the following technical features. By taking the necessary steps, they achieved the above objective.

That is, the present invention provides a cutting blade body 1 having a cutting blade part 12 at the outer end.
An upward recess 16 is provided in the center of 3, and within the upward recess 16,
Drive wheel 8 and ground stabilizing body 5 that are rotationally driven around a horizontal axis
9 are housed in parallel, and the ground contact portion of the ground stabilizing body 59 is located between the cutting plane of the cutting blade body 13 and the ground contact portion of the drive wheel 8.

(Function) During reaping work, the operator grips the handle 6 of the brush cutter main body 1 with only the drive wheel 8 in contact with the ground, or with both the drive wheel 8 and the stable grounding body 59 in contact with the ground. Maintain your posture. The cutting blade body 13 is rotated around the vertical axis by the engine 9, and the drive wheel 8 is driven around the horizontal axis by the motor 10, and the driving force is used to move forward, backward, etc.
A rotating cutting blade body 13 that moves forward and backward or left and right, etc.
Weeds, etc. are cut down using the In this case, the drive wheels 8 are positioned by the positioning mechanism 37 at the forward position A when moving in the front-rear direction such as forward movement, and at the lateral position B when moving in the left-right direction.

When changing the direction of the drive wheel 8, after releasing the positioning by the positioning mechanism 37, the operating lever 52 is rotated left and right.

When reaping while reciprocating in the front-rear direction and left-right direction, the motor 10 rotates the drive wheels 8 in forward and reverse directions.

When reaping work is performed with both the drive wheel 8 and the stable grounding body 59 in contact with the ground, the stable grounding body 59 that is in contact with the ground
The material cut on the opposite side is discharged in the direction of arrow E.

<Example> The present invention will be described in detail below with reference to the illustrated example.
In the figures to FIG. 3, reference numeral 1 denotes a brush cutter main body, which includes a first transmission case 2, a connecting cylinder 3, a second transmission case 4, a support rod 5,
Consists of 6 handles.

On the lower side of the first transmission case 2, there is a cutting blade body 13 that rotates around a vertical axis, and a drive wheel 8 located below the center of the cutting blade body 13.
and a stable grounding body 59 are arranged in parallel, and the second transmission case 4
On the side opposite to the connecting cylinder 3, there is an engine 9 for driving the cutting blade body,
The connecting cylinder 3 has a forward/reverse motor 10 for driving the drive wheel 8.
are installed respectively.

The first transmission case 2 is located at the lower end of the main body 1,
A connecting cylinder 3 is attached to the rear side of the first transmission case 2 so as to be inclined rearward and upward. The second transmission case 4 is attached to the inclined upper end of the connecting cylinder 3 in a direction perpendicular to the upper end thereof, and a support rod 5 is attached to the lower side of the second transmission case 4 so as to be inclined rearward and upward. There is.

The support rod 5 is stepped from the connecting cylinder 3 via the second transmission case 4, and the bracket 1) of the second transmission case 4
The angle can be freely adjusted in the vertical direction. The handle 6 has a bifurcated shape and is attached to the rear end of the support rod 5.

As shown in FIGS. 2 to 4, the cutting blade body 13 has a plurality of cutting blade parts 12 on the outer periphery (outer end) of the annular blade 7. The cutting blade body 13 is composed of a disk 16A having an upward concave portion 16 formed in a truncated conical cross section in the central portion thereof, and the upward concave portion 16 is substantially defined by a conical portion 16B, and the lower end of the conical portion 16B. The cutter 7 is detachably attached to the attachment portion 14 on the outer periphery by a plurality of ports 15 in the circumferential direction.

The drive wheel 8 has a disk 1 as shown in FIGS.
Inverted U-shaped bracket 17 within the frustoconical portion 16B to 6
is supported via a support shaft 18.

The support shaft 18 is rotatably supported at both ends by bearings 19 of the bracket 17 around a horizontal axis, and the drive wheel 8 is constituted by a pair of wheels 20 fitted around the support shaft 18 so as to be integrally rotatable. ing. A cylindrical gear case 22 having a plate member 21 at one end is interposed between the pair of wheels 20,
Built into this gear case 22 are a hevel gear 23 that is integrally rotatably fitted onto the support shaft 18 and a bevel pinion 24 that meshes with the hevel gear 23 . The gear case 22 is fixed to the bracket 17 via a cylindrical body 25.

A pair of stable grounding bodies 59.59 are arranged in parallel on both sides of the driving wheel 8 in the transfer direction, that is, in the working direction. It is being

An inverted U-shaped bracket 60 that intersects with the bracket 17 in plan view is provided, a support shaft 61 is rotatably installed on this bracket 60, and a stable grounding body 59° 59 is fitted onto this support shaft 61. .

The stable grounding body 59, 59 is ring-shaped, and its support shaft 61 is parallel to the support shaft 18 of the drive wheel 8, so that it can rotate in the same direction as the rotation direction of the drive wheel 8.

Furthermore, each grounding part of the stable grounding body 59.59 is a fifth
As shown in the figure, the cutting plane of the blade 7 in the cutting blade body 13,
It is located between the ground contact part of the drive wheel 8, and here the first
As shown in FIG. 2, when one stable grounding body 59 and the driving wheel 8 are both grounded, the blade 7 is inclined with respect to the ground.

As shown in FIG. 4, an outer cylinder shaft 28 is rotatably supported around a vertical axis by a bearing holding portion 26 in the first transmission case 2 via a pair of upper and lower bearings 27. axis 28
An intermediate cylindrical shaft 29 is fitted therein, and an inner shaft 30 is fitted within the intermediate cylindrical shaft 29 concentrically and relatively rotatably. Outer cylinder shaft 2
8 has a bevel gear 31 at its upper end, and a cutting blade body 13 at its lower end.
are provided so as to be rotatable together. An operating lever 32 is fixed to the upper end of the intermediate cylinder shaft 29, and a bracket 17 for the drive wheel 8 and a bracket 60 for the stable grounding body 59.59 are fixed to the lower end. Further, a bevel gear 33 is provided at the upper end of the inner shaft 30, and a bevel pinion 24 is provided at the lower end so as to be rotatable together. Note that the upper end of the inner shaft 30 is supported by a lid 34 mounted on the first transmission case 2 via a bearing 35.

As shown in FIGS. 4 and 7, the operating lever 32 protrudes outward through a long hole 36 formed in the side wall of the first transmission case 2 in the circumferential direction over an approximately 90 degree range.
By rotating the operating lever 32, the drive wheel 8 can be changed between a forward position A (imaginary line in FIG. 2) where it can move forward and backward, and a lateral position B (dotted line in FIG. 2) where it can move left and right. , Along with this change, the stable grounding body 59.59 is also changed.

The operating lever 32 is moved to each position A by a positioning mechanism 37.
, B to lock it. This positioning mechanism 37 includes two pin holes 38 and 39 formed in the side wall of the first transmission case 2, an L-shaped positioning pin 41 supported by the operating lever 32 via a bracket 40, and this positioning pin. Spring 4 that urges 41 toward the first transmission case 2 side
2, and the positioning pin 41 can be selectively engaged with and detached from the bottle holes 38 and 39.

As shown in FIGS. 4 and 6, a cylinder shaft 43 and an inner shaft 44 are fitted concentrically into the connecting cylinder 3, and rotatably supported by bearings 46 and 47 at both ends. cylinder shaft 43
A bevel gear 48 that meshes with the bevel gear 33 inside the first transmission case 2 is provided on the inner shaft 44 , and a bevel gear 49 that meshes with the bevel gear 31 inside the first transmission case 2 is provided on the inner shaft 44 .

As shown in FIGS. 1 and 6, the engine 9 is attached to the second transmission case 4 via a housing 50 and a bracket 51 on the side opposite to the connecting cylinder 3 and above the support rod 5. The output shaft 52 of this engine 9 is interlocked and connected to the inner shaft 44 via an electromagnetic clutch 53 within the housing 50. Therefore, if you start engine 9,
The cutting blade body 13 can be driven to rotate around the vertical axis via the inner shaft 44, bevel gears 49, 31, outer cylinder shaft 28, and disk 16A. Note that the electromagnetic clutch 53 may be omitted.

The motor 0 is fixed to a mounting plate 54 fixed to the connecting cylinder 3 near the second transmission case 4 so as to be parallel to the lower side of the connecting cylinder 3. The output shaft 55 of this motor 1° is operatively connected to the cylindrical shaft 43 via a small diameter gear 56 and a large diameter gear 57 in the second transmission case 4, as shown in FIG. Therefore, the drive wheel 8 can be rotationally driven around the horizontal axis by the motor 9 via the output shaft 55, gears 56, 57, cylindrical shaft 43, hevel gears 48, 33, inner shaft 30, bevel pinion 24, and bevel gear 23. . The motor 10 is of a forward/reverse rotation type, and a changeover switch or start switch for rotating the motor 10 in forward and reverse directions is provided on the grip portion 58 of the handle 6.

The engine 9 is equipped with a generator, and power is supplied to the electromagnetic clutch 53 and the motor 9 from the generator.

When cutting weeds, etc. with the brush cutter having the above configuration, the following steps should be taken.

FIG. 1 shows a state in which the drive wheel 8 is placed in the lateral position B. At this time, the positioning pin 4I of the positioning mechanism 37 is engaged with the pin hole 39, and the intermediate cylinder shaft 29 is positioned so that the drive wheel 8 is in the lateral position B. It is locked in such a way that it cannot be rotated.

Therefore, when working, the drive wheel 8 and one stable grounding body 59 are
With the handle 6 on the ground, the operator grasps the pair of grips 58 of the handle 6 and maintains a posture so as not to fall to the left or right.The operator rotates the cutting blade body 13 with the power from the engine 9, and then the motor Reaping is carried out by rotating the cutting blade body 13 while reciprocating the front side from side to side by operating the changeover switch 10 as appropriate. During this reciprocating movement, the stable grounding bodies 59 on the work progress direction side are alternately grounded.

When a forward rotation command is given to the motor IO using the changeover switch,
The drive wheel 8 rotates in the normal direction around the horizontal axis in the front-rear direction via the output shaft 55, gear 56, 57, cylinder shaft 43, bevel gear 48, 33, inner shaft 30, bevel binion 24, bevel gear 23, and support shaft 18. As the brush cutter rotates and the front side of the brush cutter moves in the direction of arrow a in FIG. 8, the rotating cutting blade body 13
Weeds, etc. will be cut down. Then, after reaching a predetermined position in the left direction, when a reverse rotation command is given to the motor 10 using the changeover switch, the motor 10 is switched to reverse rotation, so that the driving wheels 8 are rotated in reverse through the aforementioned transmission system. Accordingly, the front side of the brush cutter moves in the direction indicated by the arrow b in FIG. 8, and weeds and the like are similarly cut by the cutting blade rotating 130 times.

At this time, the support shaft 18 is oriented in the front-rear direction, but the drive wheel 8
When the operator switches from normal rotation to reverse rotation or from reverse rotation to normal rotation, if the operator swings the handle 6 slightly from side to side, the stable grounding ring 59
are grounded alternately, and while being supported by one of the grounding wheels 59 and the driving wheel 8, the driving wheel 8 advances diagonally while moving left and right, and advances in a zigzag pattern as shown in FIG. It is possible to reap over a certain width C.

When mowing by moving the brush cutter forward or backward, the drive wheel 8
change the orientation to forward position A. That is, since it is in the horizontal position B in FIG. 4, first remove the positioning pin 41 from the pin hole 39 against the spring 42, unlock the operating lever 52, and then move the operating L/bar 52 as shown in FIG. Rotate approximately 90 degrees in the direction of arrow d. Then, the drive wheel 8 rotates via the intermediate cylinder shaft 29 from the lateral position B to the forward position A as shown by the imaginary line in FIG. 52
Fix it so that it cannot rotate again. Now the drive wheel 8 is the support shaft 18
At the same time, the stabilizing grounding body 59 is also changed. Therefore, if the drive wheels 8 are rotated in the normal direction, the mower will move forward, so as shown in FIG. Weeds, etc. can be harvested.

Even in this forward facing state, if you swing the handle 6 slightly left and right while rotating the motor 10 in the forward and reverse directions, as shown in Figure 1),
It can also move in a zigzag pattern to the left or right while moving forward and backward, and the stable grounding body 59 on the side in the direction of movement can also support the load.

In the embodiment, the brush cutter main body 1 is configured in a stepped manner, and the engine 9 and the motor 10 are attached thereto. The engine 9 and the motor 10 are mounted on the first transmission case 2 and one support rod 5 extends diagonally upward at the rear.
Alternatively, the engine 9 and motor 10 may be attached to the support rod 5 via a mounting plate.

The drive wheels 8 may be fixed at the forward position A or the lateral position B, and may only be capable of forward and backward movement or left and right movement.

The cutting blade body 13 is divided into a plurality of parts in the circumferential direction, and a disc 16
If the mounting position can be changed on both the upper and lower sides of the mounting portion 14 of A, the cutting height can also be adjusted.

Further, the cutting blade body 13 may be configured as a band-shaped blade instead of the disk 16A, and the central portion thereof may be fixed to the outer cylinder shaft 28.

Further, the stable grounding body 59 may be in the form of a sliding shoe, and although a pair is provided, it may be provided only on one side in the direction of movement by the driving wheels.

(Effects of the Invention) According to the present invention, the drive wheel 8 that is rotatably driven around the horizontal axis is provided below the center of the cutting blade body 13, so that the operator can remove the metal body after mowing during work. No need to support weight
Furthermore, there is no need for the operator to move the brush cutter when moving it back and forth or left and right, so the work can be done more easily and efficiently than in the past. Further, since the stable grounding body 59 is arranged in parallel with the drive wheel 8, when both are brought into contact with the ground, the cutting blade body 13 is rotated on an inclined surface, thereby making it possible to cut grass and release grass clippings in a good manner. Furthermore, the driving wheel 8 is connected to the cutting blade body 1.
3, the weight balance is good even when it is moved by the driving force of the drive wheels 8, and a stable posture can be maintained.

Moreover, since the driving wheel 8 passes through the mowing area made by the cutting blade body 13, the cutting height of the cutting blade body 13 is constant, the finish after cutting is good, and the resistance of the driving wheel 8 can be reduced.

Furthermore, an upward recess 16 is provided in the center of the cutting blade body 13, and the drive wheel 8 and the stable grounding body 59 are housed in parallel in the recess 16, so that the narrow diameter of the drive wheel 8 can be increased. Despite ensuring a stable posture, it is also possible to reduce the volume in the vertical (height) direction, which further improves the balance during work.

[Brief explanation of the drawing]

Figures 1 to 1) illustrate one embodiment of the present invention, in which Figure 1 is a side view of the brush cutting metal body, Figure 2 is a plan view of the front part of the brush cutter, and Figure 2 is a plan view of the front part of the brush cutter. Figure 3 is a bottom view of the same, Figure 4 is a cross-sectional side view of the same, Figure 5 is a cross-sectional front view of the drive wheel portion, Figure 6 is a cross-sectional side view of the second transmission case portion, and Figure 7 is a cross-sectional side view of the positioning mechanism portion. A sectional plan view, Fig. 8 is a perspective view of the working state, Fig. 9
Figures 1 to 1 are explanatory diagrams of working conditions, and Figure 12 is the same J-side view. 1... Brush cutter body, 2... First transmission case, 3...
...Connection cylinder body, 4...Second transmission case, 5...Support rod, 7...Cutter blade body, 8...Drive wheel, 9...Engine, 1o...Motor, 13 ...Cutter blade body, 16...
Upward concave portion, 28... Outer cylinder shaft, 29... Intermediate cylinder shaft, 3
0...Inner shaft, 32...Operation lever, 37...Positioning mechanism, 43...Cylinder shaft, 44...Inner shaft, 59...
- Stable grounding body, A...forward position, B...lateral position. Patent Applicant: Kubota Iron Works Co., Ltd. 1st Special Law UG3-177732 (6) Figure 9 Figure 77 Figure 70 Figure 72 October 17, 1988 Patent Application No. 7160 2, Invention Name of Portable Brush Cutter 3, Relationship with the Amendment Case Patent Applicant (105) Kubota Iron Works Co., Ltd. 4゜ Representative ◎577 Address 1013 Mikuriya, Higashiosaka City, Osaka Prefecture Showa
Date (voluntary) 6. Subject of amendment, title of the invention, scope of claims in the specification, detailed explanation of the invention in the specification, brief explanation of drawings in the specification, drawings 7. Contents of the amendment Next Page 7. Contents of the amendment (1) The name of the invention in the specification is corrected to "brush cutter." (2) The claims of the specification shall be amended as per the attached sheet. (3) "Portable" in the 19th line of the 2nd page, line 16.200 of the original handwriting of the specification is deleted. (4) In the third to seventh lines of page 3 of the specification, "the central part of..." means "a traveling body 8 rotated around a horizontal axis in the vicinity of." is provided near the traveling body 8,
"A ground stabilizing body 59 is provided to prevent the cutting blade portion 12 of the cutting blade body 13 from scraping the ground." (5) Specification No. 3 Handwriting 10.1). 15.19.200
Line 4th page 2.6.8.199th page 5th line 1st line,
Page 6, line 4.8.17.199, page 7, line 6.7.1
0. Line 122, page 8 2. Line 133, page 10, page 10
．． Line 200, page 1), line 2.5, page 12, line 4.7
~8.1). Line 166, page 13, No. 1.4-5.7, page 14, No. 3.12. Line 166, page 15, No. 1.4.5.
7. Lines 9-10, page 16, line 1.9 “Drive wheel”
are respectively corrected as ``running object.'' (6) Insert the following sentence between “When done” and “Earth contact” on page 4, line 9 of the specification, “Mowing is carried out in a state where the cutting blade portion 12 is prevented from scraping the soil.” do. (7) 1 on page 7, line 13 of the specification. "teeth,"
However, the cutting blade portion 12 is prevented from scraping the earth. ” he corrected. (8) On the bottom center of page 14, line 15 of the specification,
is corrected to "nearby." (9) “Furthermore, it is possible.” in lines 1) to 16 of page 15 of the specification means “Furthermore, a stable grounding body 59 is provided near the cutting blade body 13.” Since the cutting blade section 12 is prevented from scraping the soil, the cutting blade body 13 will not be damaged early even if the cutting blade body 13 is rotated on an inclined plane.'' α0) In the attached drawings, Figures 2 and 6 are corrected as shown in the attached sheet. 2. Claims (1) A cutting blade body 13 that rotates around a vertical axis 6 is provided at the tip of the brush cutter main body 1. This brush cutter has a vertical plate U1 of a blade body 13, and a running body 8 that is rotatably driven around a flat axis.

Claims (1)

[Claims] (1) In a portable brush cutter in which a cutting blade body 13 that rotates about a vertical axis is provided at the tip of the brush cutter main body 1, the center of the cutting blade body 13 has a cutting blade portion 12 at the outer end. An upward recess 16 is provided in the upper recess 16, and a drive wheel 8 rotated around a horizontal axis and a ground stabilizer 59 are housed in parallel, and the ground contact part of the ground stabilizer 59 is A portable brush cutter characterized in that it is located between the cutting plane of the cutting blade body 13 and the ground contact portion of the drive wheel 8.