JPH07227126A - Tea tree-pruning machine - Google Patents

Abstract

PURPOSE:To provide a tea tree-pruning machine equipped with a hair clipper type pruning blade, a stabilizing plate, etc., preventing the seizure of an air- cooled engine, and excellent in operability and handleability. CONSTITUTION:This tea tree-pruning machine comprises a frame 2 having operation handles 3, 4 at both the ends as a parent body, a hair clipper type pruning blade 5 disposed along the front edge of the frame, a stabilizing plate 6 continuously attached to the rear edge of the frame 2, a crank casing 10 having a mechanism for driving the hair clipper type pruning blade 5 therein and disposed at the tip side end 2b of the frame 2, an air-blower 8 continuously attached to the upper surface of the crank casing, and the air-cooled engine 11 for rotating a fan 8a and the driving mechanism of the hair clipper type pruning blade 5 through a clutch device in the upper fan casing 8b and the lower fan casing 8c. A main air inlet port 8g and a subsidiary air inlet port 8h having a smaller opening area than that of the main air inlet port 8g are formed in the lower surface of the lower fan casing 8c of the air-blower 8 and in the upper surface of the upper fan easing 8b, respectively. The subsidiary air inlet port 8h is disposed below the cylinder head 11c of the air-cooled engine 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tea tree pruning machine used for pruning the upper surface of a tea tree ridge after plucking tea leaves, and more particularly to a tea tree pruning machine having an improved intake port of a blower.

[0002]

2. Description of the Related Art As such a tea tree pruning machine, a small and lightweight portable machine for two people has been generally known. This type of tea tree pruning machine is configured with a frame as a mother body, which is curved upward along the upper surface of the tea tree ridge and extends in the width direction of the tea tree ridge, and has operation handles for working at both ends. A hair clipper-type cutting blade body is arranged on the front edge side, and a stabilizer plate is mounted on the rear edge side of the frame to stabilize the machine body by riding on the upper surface of the tea tree ridge that has been pruned.

A casing having a crank type driving mechanism for reciprocating the hair clipper type cutting blade at one end of the frame, and branch and debris that are shrunken and scattered on the stabilizer are blown to the furrow side. A blower that blows out pressured air on the frame and the stabilizing plate, and a two-cycle air-cooled engine that rotationally drives the fan of the blower and the crank type drive mechanism in the casing via a clutch device housed in the fan casing of the blower. Etc. are arranged collectively.

Here, the blower is continuously installed on a casing containing a crank type drive mechanism, and an air-cooled engine having a crankshaft protruding downward is continuously installed on the blower. The cylinder head portion, the fuel tank portion, the carburetor portion, the muffler portion, etc. of the air-cooled engine are opposed to the upper surface of the air-cooled engine (actually, 2-57
318).

[0005]

By the way, in the tea tree branching machine described in the above publication, since the intake port of the blower is largely opened on the upper surface of the fan casing, the tea tree branching machine leaks from the fuel tank part or the carburetor part of the air-cooled engine. Mixed oil,
There was a possibility that exhaust gas discharged from the muffler portion, branch-and-leaf debris that had been shrunken and scattered, would enter the fan casing through the intake port. That is, in the conventional tea tree branching machine, the clutch device slips and is damaged due to the admixture of the mixed oil that has penetrated into the fan casing, or branches of various sizes are clogged in the fan casing to cause the clutch device. There was a possibility that the fan would be damaged.

[0006] Therefore, the present invention provides a tea tree branching machine which can secure a sufficient amount of air from the blower and can positively prevent the seizure of the air-cooled engine, as well as the possibility of damaging the clutch device and the fan. The purpose is to do.

[0007]

To this end, the present invention has a hair clipper type which extends along the upper surface of a tea tree ridge in the width direction thereof and has a frame having operation handles at both ends as a mother body and which extends along the front edge of the frame. A cutting blade body, a stabilizer that is continuous to the trailing edge of the frame, a casing that has a built-in drive mechanism for the clipper-type cutting blade body and is disposed at one end of the frame, and the casing that is connected above the casing and is connected to the frame. And a blower that blows out pressured air toward the stabilizer, and a fan of the blower and a drive mechanism in the casing are rotationally driven through a clutch device that is connected above the blower and is arranged in the fan casing of the blower. In a tea tree branching machine provided with an air-cooled engine, the fan casing of the blower has a main intake port on the lower surface and an opening surface on the upper surface from the main intake port. Sub inlet were respectively opened small, the sub-air inlet, and means that it has disposed below the cylinder head of the air-cooled engine.

Here, the present invention also has a means in which the opening area of the sub-intake port is set in the range of 1/4 to 1/2 of the opening area of the main intake port.

Further, in these means, an intake port cover for preventing the inhalation of the branches and leaves on the upper surface of the tea tree ridge is attached to the main intake port, or an intake port cover for preventing the invasion of the branches and leaves of the tea tree that are shattered and scattered. Is also attached to the sub intake port.

[0010]

In the tea tree branching machine according to the present invention which employs such means, the fan of the blower and the drive mechanism of the hair clipper type cutting blade are rotationally driven through the clutch device with the operation of the air-cooled engine. The branches and debris of the tea plant that has been pruned by the clipper-type cutting blade are blown to the furrow side by the pressure air blown from the blower onto the frame and the stabilizer. At that time, air is taken from the main intake port that opens on the lower surface of the fan casing and the sub intake port that opens on the upper surface of the fan casing inside the fan casing of the blower, so the blower stabilizes a sufficient amount of compressed air. Blow toward the board.

Here, since the main intake port opens on the lower surface of the fan casing, it is rare that the branches and leaves of the tea plant that are cut off and scattered inadvertently inadvertently occur. In addition, the main intake port is additionally provided with an intake port cover. In this case, the branches and leaves on the upper surface of the tea tree ridge are also blocked by the intake port cover and not sucked into the main intake port.

On the other hand, the sub intake port opens on the upper surface of the fan casing, which is on the windward side of the pressure air blown from the blower, and the opening area is smaller than that of the main intake port, so that finely chopped debris enters. There is almost nothing to do. In addition, in the case where the sub-intake port is additionally provided with an intake port cover, relatively large debris scattered against the pressure air blown from the blower is also blocked by the intake port cover and hardly enters the sub-intake port.

Further, since the opening position of the sub-intake port is set below the cylinder head portion of the air-cooled engine, the high-temperature engine cooling air after cooling the cylinder head portion as the air-cooled engine is operated is not cooled by the sub-intake air. The air is sucked into the fan casing through the mouth and is blown out from the blower as pressure air. Therefore, the circulation of the engine cooling air becomes good, and the seizure of the air-cooled engine is prevented.

Further, since the sub intake port is opened below the cylinder head portion of the air-cooled engine, the mixed oil leaked from the fuel tank portion or the carburetor portion of the air-cooled engine or the exhaust gas discharged from the muffler portion is discharged from the blower. There is no direct intrusion into the casing.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. 1 and 2 show the overall structure of a small and lightweight portable tea tree pruning machine 1 for two-person operation, in which reference numeral 2 is upward from the top portion of the upper surface of the tea tree ridge to the hem portion. A frame that curves and extends in the width direction of the tea tree ridge,
Reference numeral 3 is a hem side end portion 2 of the frame 2 corresponding to the hem portion
A hem-side operation handle attached to a, reference numeral 4 denotes a crest-side operation handle arranged on the crest-side end 2b side of the frame 2 corresponding to the crest portion. Further, reference numeral 5 is a clipper-type cutting blade body composed of a combination of an upper blade 5a and a lower blade 5b, which are superposed on the lower surface side along the front edge of the frame 2, and reference numeral 6 is a shearing blade by the clipper-type cutting blade body 5. Each of the stabilizers is provided continuously on the rear edge side of the frame 2 so as to stabilize the machine body by riding on the upper surface of the tea tree ridge after the branch work.

In FIGS. 1 and 2, reference numeral 7 indicates a scattering prevention cover for preventing scattering of branch and leaf debris on the stabilizer 6 which is blown to the furrow side of the tea tree ridge by the blower 8 described later, and this scattering prevention cover 7 Is a pair of left and right brackets 9
By being supported via a and 9a, the stabilizer 6 rises upward from the rear edge of the stabilizer 6 from the longitudinal center to the hem-side end 6a, and bends forward along the stabilizer 6 for a predetermined length. The fixed cover 7a and the hem side end 6a of the stabilizer 6 are screwed and fixed to the end of the upper wall portion 7b of the fixed cover 7a through a long hole to adjust the vertical position. And a movable cover 7c.

Here, the top end 2b of the frame 2
A crank casing 10 having a built-in crank type drive mechanism for reciprocating the upper blade 5a and the lower blade 5b of the clipper type cutting blade body 5 in mutually opposite directions is continuously provided therein (FIG. 3).
reference). An air blower 8 and a two-cycle air-cooled engine 11 are sequentially stacked above the crank casing 10.

The blower 8 is provided with an upper half casing 8b and a lower half casing 8c for housing a fan 8a, and the blowing nozzle 8d formed by the upper and lower fan casings 8b and 8c is The frame 2 faces the upper surface side and is opened so as to blow out the pressure air from the top end portion 2b toward the hem side end portion 2a. A mounting base 8e is provided so as to project from the upper surface of the upper fan casing 8b, and the air-cooled engine 11 is fixed onto the mounting base 8e.

In the air-cooled engine 11, a fuel tank 11a is attached to the top operation handle 4 side so that refueling can be easily performed, and a cylinder head portion 11c having an ignition plug 11b is provided on the opposite side. positioned. And this air-cooled engine 11 has a carburetor part 1
1d is arranged on the front side, a muffler portion 11e is arranged on the rear side, and a recoil starter portion 11g having a cooling air introduction port 11f is arranged on the upper portion.

The crankshaft 11h of the air-cooled engine 11 is
As shown in FIG. 3, it penetrates through the mounting base 8e of the upper fan casing 8b and projects downward. A centrifugal clutch device 13 is connected via a joint 12 to the end of the crankshaft 11h that faces the upper fan casing 8b. The fan 8a housed in the upper fan casing 8b and the lower fan casing 8c is
The center of the drum portion 8f is integrally connected to the input shaft 14 of the crank type drive mechanism protruding upward from the crank casing 10 by serration connection or key connection.
The centrifugal clutch device 13 facing the inside of the drum portion 8f is pressed against the inner circumference of the drum portion 8f, so that the rotational power of the crankshaft 11h of the air-cooled engine 11 is transmitted to the fan 8a and the input shaft 14. ing.

Here, as shown in FIGS. 1, 3 and 4, a main intake port 8g is opened on the lower surface of the lower fan casing 8c of the blower 8, and a sub intake port is formed on the upper surface of the upper fan casing 8b. 8h is opened.

The main intake port 8g is opened in a fan shape at an appropriate position where it does not overlap the frame 2 or the crank casing 10. In this embodiment, the main intake opening 8g is opened in three fan shapes having a central angle of about 40 degrees. Therefore, the opening area is large. The main intake port 8g is covered with a grid-shaped intake port cover 15 screwed and fixed to the fan casing 8c so that branches and leaves on the upper surface of the tea tree ridge are not inadvertently inhaled.

On the other hand, the sub intake port 8h is a quadrangular one whose opening cross-sectional area is set to be about 1/4 to 1/2 smaller than that of the main intake port 8g.
Is arranged immediately below the cylinder head portion 11c of the air-cooled engine 11 so that the mixed oil leaked from the fuel tank 11a or the carburetor portion 11d or the exhaust gas discharged from the muffler portion 11e does not directly enter. .

Further, in order to prevent inadvertent entry of relatively large debris shredded and scattered by the clipper-type cutting blade body 5 into the sub intake port 8h, the upper fan casing 8b has an intake port on its upper surface. The cover 16 is fixed by screws. As shown in FIGS. 3 and 4, the intake port cover 16 extends along the side of the sub intake port 8h close to the hair clipper type cutting blade body 5 along the cylinder head portion 1 of the air-cooled engine 11.
Wall-like cover portion 16a that rises up to the vicinity of 1c
And a base portion 16b screwed and fixed to the upper surface of the upper fan casing 8b to form an L-shaped cross section.

Next, the operation of the tea tree pruning machine 1 of the present embodiment configured as described above will be described. This tea tree pruning machine 1 is for two-person work, which is used for pruning a tea tree after plucking tea leaves. At the time of the work, an operator stands between the ridges on both sides of the tea tree ridge, and respectively The operating handle 3 and the top operating handle 4 are supported by hand, and the clipper type cutting blade 5 is positioned so that it extends from the top of the tea tree ridge to the hem and the stabilizer 6 is guided to the upper surface of the tea tree ridge.
Then, the hair clipper type cutting blade body 5 and the blower 8 are driven by the start of the air-cooled engine 11, and the hair clipper type cutting blade body 5 is walked along with the hair clipper type cutting blade body 5 in front of the hair clipper type cutting blade body 5.
By this, the tea tree pruning work is successively performed.

In the above-mentioned pruning work, the amount of pruning of the tea plant is about 10 to 15 cm, but if this is deeply pruned once, the branches and debris that have been pruned are too large to fall well between the ridges of the tea plant ridge. However, since it will hinder the pruning work, the same ridge is usually reciprocated about three times and the branches are gradually pruned. During such a pruning operation, the branches and leaves of the tea tree that have been pruned by the clipper-type cutting blade body 5 are cut up on the upper surfaces of the frame 2 and the stabilizer plate 6, and by the pressure air blown from the blower nozzle 8d of the blower 8. The stabilizer 6 is blown off to the hem side end 6a side. In addition, since a scattering prevention cover 7 is attached in a range extending from the central portion in the longitudinal direction of the stabilizer plate 6 to the hem side end portion 6a, the branch wastes blown off by the blower 8 are carelessly placed on the upper surface of the finished tea tree ridge. It does not scatter on the ground and falls smoothly between the ridges of the tea tree ridge.

Here, regarding the capacity of the blower 8,
In the present embodiment, in addition to the main intake port 8g having a large opening area that is opened on the lower surface of the lower fan casing 8c, the opening cross-sectional area that is opened on the upper surface of the upper fan casing 8b is 1/4 to 1 / the size of the main intake port 8g. 2 sub inlets 8
Since air is also taken in from h, the blower 8 can blow out a sufficiently good pressured air.

Further, the main intake port 8g is opened on the lower surface of the lower fan casing 8c from which the amount of scattered branches and leaves is originally small, and the entire surface thereof is a grid-like intake port cover 1.
Since it is covered with No. 5, it is rarely inadvertently sucked into the main intake port 8g of the branches and leaves scraped off and the branches and leaves on the upper surface of the tea tree ridge.

On the other hand, the sub intake port 8h is opened on the upper surface of the upper fan casing 8b, which is on the windward side of the pressure air blown from the blower nozzle 8d of the blower 8, and the opening area is 1/4 of the main intake port 8g. Since it is set to be as small as about 1/2, the fine branch and leaf debris shredded by the clipper-type cutting blade body 5 hardly enters the sub intake port 8h. The relatively large debris shredded by the clipper-type cutting blade body 5 may be scattered toward the sub intake port 8h against the pressure wind from the blower 8. It collides with the cover portion 16a of the cover 16 and is prevented from entering the sub intake port 8h.

Further, the sub intake port 8h avoids the position below the fuel tank 11a of the air-cooled engine 11, the carburetor part 11d, and the muffler part 11e, and the cylinder head part 1
Since it is arranged below 1c, even if the mixed oil leaks from the fuel tank 11a or the carburetor part 11d, it cannot directly enter the upper fan casing 8b and the lower fan casing 8c through the sub intake port 8h. Absent. Similarly, there is no possibility that exhaust gas discharged from the muffler portion 11e will directly enter the upper fan casing 8b and the lower fan casing 8c.

Therefore, in this embodiment, the upper fan casing 8b and the lower fan casing 8 of the blower 8 are arranged.
The mixed oil adheres to and slips on the centrifugal clutch device 13 disposed inside c, and the centrifugal clutch device 13 is damaged, and the branches and leaves of tea plants that are cut off and scattered are the upper fan casing 8b and the lower fan casing. A situation such as the inside of 8c being clogged and the fan 8a being damaged can be avoided.

In this embodiment, as described above, the sub intake port 8h is the cylinder head portion 11c of the air-cooled engine 11.
Due to the fact that it is opened downward, the high temperature engine cooling air after cooling the cylinder head portion 11c by being introduced from the cooling air introduction port 11f with the operation of the air-cooled engine 11 passes through the sub intake port 8h to the upper part. The air is positively sucked into the fan casing 8b and the lower fan casing 8c.
Therefore, the circulation of the engine cooling air is improved, and the seizure of the air-cooled engine 11 is prevented.

5 and 6 show a modified example of the intake port cover 16 in this embodiment, and FIG. 7 shows a modified example of the sub intake port 8h. Here, the inlet cover 1 shown in FIG.
7 surrounds three sides of the sub intake port 8h along one side of the sub intake port 8h near the clipper type cutting blade body 5 and two other sides continuous to this side, and the cylinder head portion 11c of the air-cooled engine 11 is A wall-shaped cover portion 17a having a U-shape in plan view that rises upward to the vicinity, and a base portion 17b fixed to the upper surface of the upper fan casing 8b with screws.
Have and.

The intake port cover 17 has a sub intake port 8h.
Since it surrounds the three sides of the
As a result, it is possible to more reliably prevent the relatively large branches scraped by the branch and scattered from entering the sub intake port 8h. In addition, the high temperature engine cooling air after cooling the cylinder head portion 11c can be introduced into the sub intake port 8h more efficiently.

The intake port cover 18 shown in FIG. 6 has a flat plate shape having a large number of small holes 18a, and is screwed and fixed to the upper surface of the upper fan casing 8b to cover the entire surface of the sub intake port 8h. This intake port cover 18 can prevent not only relatively large debris shattered and scattered by the clipper-type cutting blade 5 but also small debris from entering the sub intake port 8h. In addition, this intake cover 1
8 may have a structure having a wire mesh instead of the large number of small holes 18a.

The sub-intake port 19 shown in FIG. 7 is composed of a large number of small holes formed in the upper surface of the upper fan casing 8b. It can also prevent the invasion of naive branches and leaves. The sub intake port 19 can be punched at the time of press forming the upper fan casing 8b, and a separate intake port cover is not required, which is advantageous in cost reduction.

In this embodiment, as shown in FIG. 1, FIG. 2 and FIG. 4, the chrysanthemum portion 20 is provided on the outer end side of the crank casing 10 which is connected to the top end 2b of the frame 2. , 2
No. 0 is provided, and the top operating handle 4 is fixed via the chrysanthemum seats 20 and 20 so that the turning position can be adjusted freely. Therefore, the work of adjusting the turning position of the top operating handle 4 is easy and Since the work place is separated from the clipper-type cutting blade 5, it is safe.

[0038]

As described above, according to the present invention, when the fan of the blower is rotationally driven through the clutch device with the operation of the air-cooled engine, the blower causes the fan to pass through the main intake port and the sub intake port. Since the air is taken into the casing, it is possible to secure a sufficient air volume of the blower.

Here, since the main intake port is opened to the lower surface of the fan casing, the branches and leaves of the tea tree that have been shrunken and scattered rarely inadvertently enter inadvertently. In addition, an intake port cover is attached to the main intake port. In this case, the branches and leaves on the upper surface of the tea tree ridge are also blocked by the intake port cover and not sucked into the main intake port. In addition, the sub intake port opens on the upper surface of the fan casing, which is on the windward side of the pressure air blown from the blower, and the opening area is smaller than that of the main intake port. Almost never. In addition, in the case where the sub-intake port is additionally provided with an intake port cover, relatively large debris scattered against the pressure air blown from the blower is also blocked by the intake port cover and hardly enters the sub-intake port. Furthermore, since the sub intake port opens below the cylinder head of the air-cooled engine, the mixed oil leaked from the fuel tank and carburetor of the air-cooled engine, or the exhaust gas discharged from the muffler, is discharged into the fan casing of the blower. Never directly into Therefore, it is possible to prevent damage to the clutch device and the fan inside the fan casing.

In particular, since the opening position of the sub intake port is set below the cylinder head portion of the air-cooled engine, the hot engine cooling air after cooling the cylinder head portion as the air-cooled engine operates is It is sucked into the casing through the intake port. Therefore, the circulation of the engine cooling air can be improved and the seizure of the air-cooled engine can be positively prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the overall structure of an embodiment of a tea tree branching machine according to the present invention.

FIG. 2 is a perspective view showing the overall structure of one embodiment.

FIG. 3 is a partially enlarged cross-sectional view showing a main part structure of one embodiment.

FIG. 4 is a partially enlarged plan view showing a main part structure of one embodiment.

FIG. 5 is a partial enlarged plan view corresponding to FIG. 4, showing a modified example of the intake port cover in the embodiment.

FIG. 6 is a partial enlarged plan view corresponding to FIG. 4, showing another modified example of the intake port cover in the embodiment.

FIG. 7 is a partially enlarged plan view corresponding to FIG. 4, showing a modified example of the sub intake port in the embodiment.

[Explanation of symbols]

 1 Tea Tree Pruning Machine 2 Frame 2a Hem Side End 2b Top Side End 3 Hem Side Operation Handle 4 Top Side Operation Handle 5 Hair Clipper-type Cutting Blade 5a Upper Blade 5b Lower Blade 6 Stabilizer 6a Hem Side Edge 6b Top End 7 Scattering prevention cover 7a Fixed cover 7b Upper wall part 7c Moving cover 8 Blower 8a Fan 8b Upper fan casing 8c Lower fan casing 8d Blower nozzle 8e Mounting base 8f Drum part 8g Main intake port 8h Sub intake port 9a, 9a Bracket 10 Crank casing 11 Air-cooled engine 11a Fuel tank 11b Spark plug 11c Cylinder head 11d Carburetor 11e Muffler 11f Cooling air inlet 11g Recoil starter 11h Crankshaft 12 Joint 13 Centrifugal clutch device 14 Input shaft 15 Inlet cover Of six air inlet cover 16a covering portion 16b base portion 17 inlet cover 17a covering portion 17b base portion 18 inlet cover 18a large number of small holes 19 a number of small holes sub inlet 20 inner clip washer portion

Claims (4)

[Claims] 1. A frame, which extends along the upper surface of a tea tree ridge in the width direction thereof and has operation handles at both ends, is a base body, and is continuous with a clipper-type cutting blade body along the front edge of the frame and a rear edge of the frame. A stabilizer, a casing that has a built-in drive mechanism for the hair clipper-type cutting blade and is arranged at one end of a frame, and a blower that is connected to the upper side of the casing and blows pressure air toward the frame and the stabilizer. When,
A tea tree branching machine that is connected to the upper side of the blower and comprises an air-cooled engine that rotationally drives a fan of the blower and a drive mechanism in the casing via a clutch device arranged in the fan casing of the blower, The fan casing of the blower has a main intake port on its lower surface and a sub intake port having an opening area smaller than that of the main intake port on its upper surface.The sub intake port is located below the cylinder head of the air-cooled engine. A tea tree pruning machine characterized by being placed. 2. The tea tree pruning machine according to claim 1, wherein the opening area of the sub-intake port is set in a range of 1/4 to 1/2 of the opening area of the main intake port. 3. The tea tree pruning machine according to claim 1, wherein the main intake port is provided with an intake port cover for preventing intake of branches and leaves on the upper surface of the tea tree ridge. 4. The tea tree pruning according to claim 1, wherein the sub-intake port is provided with an intake port cover for preventing the invasion of the branches and leaves of the tea tree that are shredded and scattered. Machine.