JP2570218Y2 - Pruning machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting machine such as a clipper or a hedge trimmer for cutting branches and leaves, and cutting turfgrass and tea leaves.

[0002]

2. Description of the Related Art Conventionally, as a horticultural clipper for cutting lawn grass, tea leaves and the like, a speed reduction mechanism composed of a combination of two gears, a first gear and a second gear, and an eccentric cam formed on the bottom surface of the second gear are provided with a cam guide. And a motion converting mechanism connected to the guide portion of the movable blade via the eccentric cam, converts the circular motion of the eccentric cam into a swinging motion of the movable blade, and applies the shearing action of the movable blade and the fixed blade to the turf grass. , Tea leaves and the like (see Japanese Patent Application Laid-Open No. 56-106512).

As a hedge trimmer for cutting branches and leaves, a speed reduction mechanism composed of a combination of two gears, a first gear and a second gear, and an eccentric cam formed on the bottom surface of the second gear are connected to a guide portion of a movable blade. There is a mechanism provided with a motion converting mechanism, which converts the circular motion of the eccentric cam into a forward and backward motion of a movable blade, and cuts a branch or the like by a shearing operation of the movable blade and the fixed blade.

[0004]

[Problems to be Solved by the Invention] When exchanging the blades of the reaper such as the clippers and hedge trimmers described above, the eccentric cams and the cam guide holes of the movable blades are provided so that the rotational force of the eccentric cams is transmitted to the movable blades. Must be fitted,
To fit them, the final gear must be rotated or the movable blade must be gripped and moved.However, since the movable blade is directly touched by the movable blade or the eccentric cam, the hands become dirty with grease or the like. In addition to the problem of injury to the hand, there has been a problem that it takes a long time before the fitting, since the movement of the final gear and the movable blade is conventionally taken into account.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a cutter which can easily and safely perform blade replacement.

[0006]

In order to solve the above problems, the present invention provides an eccentric cam (7) integrally provided on a gear (6) for transmitting the rotational force of a driving motor (3). The movable blades (8, 11) are provided with cam guide holes (8a, 11a) into which the (7) is fitted, and the movable blades (8) are provided with spacers.
Providing a guide hole (8c) or a spacer (22)
Spacer (22) or spacer guy is attached to the fixed blade (9).
The movable blade (8) is connected to the fixed blade (9) by providing a hole (8c).
Or by moving the movable blade (11) to the fixed blade (1).
By connecting the eccentric cam (7) to the movable blade (8, 11) by connecting the eccentric cam (7) to the movable blade (8, 11) by connecting the eccentric cam (7) to the movable blade (8, 11).
In the mowing machine that converts the motion into a back-and-forth motion or a swinging motion, the positioning long holes (9a, 13a) extending along the direction of motion of the movable blades (8, 11) are inserted into the fixed blades (9, 13). The movable blades (8, 11) are provided with positioning levers (8b, 12a), and the positioning levers (8b, 12a) are inserted into the positioning slots (9a, 13).
a), and the eccentric cam (7) is fitted into the cam guide hole ( 8a, 11a ) by moving the positioning lever (8b, 12a) along the positioning long hole (9a, 13a). It is characterized by being made to match.

[0007]

As described above, a long slot for positioning along the moving direction of the movable blade is provided on the fixed blade, a positioning lever is provided on the movable blade, and the positioning lever is loosely inserted into the long slot for positioning. Therefore, when the blade is replaced and the eccentric cam is not fitted in the cam guide hole of the movable blade, when the positioning lever is moved, the movable blade also moves in a fixed direction, and the eccentric cam moves during the movement of the movable blade. Fits in the cam guide hole of the movable blade.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial sectional view of a clipper / hedge trimmer / combiner according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a case. An auxiliary handle 2 is attached to the outer surface of the case, and a driving motor 3 is housed in the case 1. The reduction mechanism is provided with a pinion gear 4 provided on a rotating shaft 3 a of the driving motor 3, a first gear 5 meshing with the pinion gear 4 and rotating about a shaft 18, and a first gear 5 meshing with the first gear 5 and rotating about a shaft 19. And a second gear 6.

A motion converting mechanism for converting the rotational motion of the driving motor 3 into a stroke motion of the movable blade 8 is fitted with an eccentric cam 7 integrally formed on the bottom surface of the second gear 6 and the eccentric cam 7. A movable blade 8 having a cam guide hole 8a.

A blade edge is formed at one end of the fixed blade 9, and holes 9b and 9c into which the shafts 18 and 19 are inserted, a positioning long hole 9a, and a connection hole 9d are respectively formed along the center line O thereof. (FIG. 9).

The movable blade 8 has a positioning lever 8 with a screw 20.
b is fixed. The positioning lever 8b is loosely inserted into the positioning long hole 9a of the fixed blade 9 (FIG. 1).
0). One end of the movable blade 8 is formed with a blade, and the other end is provided with a cross-shaped guide hole 8a. The movable blade 8 is slidably connected to the fixed blade 9 by a screw 21 and a spacer 22.

The movable blade 8 and the fixed blade 9 are metal blades for a hedge trimmer. To the fixed blade 9, a hand guard 10 for protecting hands from cut branches is fixed, and the hand guard 10 and the movable blade 8 are fixed. Is inserted between the blade cover 17 and the blade cover 17.

As shown in FIG. 2, the eccentric cam 7 has a disc-shaped eccentric cam 7a formed integrally with the bottom of the second gear 6 and a disc-shaped eccentric cam 7a. And a disk-shaped eccentric cam 7b for a hedge trimmer. More specifically, referring to FIGS.
Center has an eccentric distance L ₂ from, hedge trimmer eccentric cam 7b has an eccentric distance L ₁ from the center of the second gear 6. Here, the eccentric distances L ₁ and L ₂ are set so that the functions for the hair clipper and the function for the hedge trimmer can be effectively exhibited. Note that L ₁ > L ₂ .

Next, a case where the pruning machine is used as a hedge trimmer will be described with reference to FIGS.
First, the holes 9 b and 9 c of the fixed blade 9 for the hedge trimmer are mounted on the shafts 18 and 19. The positioning lever 8b fits into the positioning long hole 9a of the fixed blade 9 (FIG. 6). At this time, the eccentric cam 7b may be largely displaced from the cam guide hole 8a of the movable blade 8, as shown in FIGS. 7 and 8A.

Next, when the positioning lever 8b is moved to the left in FIG. 8, the state shown in FIG. 8B is reached and the state shown in FIG. 8C is reached, and the eccentric cam 7b is fitted into the cam guide hole 8a. , Can be used as a hedge trimmer.

As described above, the movable blade 8 moves in the moving direction at the time of mowing only by moving the positioning lever 8b, so that the eccentric cam 7b is easily and securely fitted into the cam guide hole 8a, and can be used as a hedge trimmer. It becomes possible. Therefore, the hands are not stained with grease or the like, and the blades are not damaged.

When the power switch (not shown) is turned on after the eccentric cam 7b is fitted into the cam guide hole 8a, the power of the driving motor 3 is transmitted to the pinion gear 4 via the rotating shaft 3a, and the first gear 5 The second gear 6 is transmitted to the second gear 6 via the second gear 6 and rotates. The eccentric cam 7b for the hedge trimmer has a vertical eccentric cam 7b for the hedge trimmer.
Is fitted in a cross-shaped guide hole 8a having a width substantially equal to the diameter of the shaft and a width larger than the width, so that when the second gear 6 rotates, the eccentric cam 7b for the hedge trimmer rotates the shaft 1
Since the movable blade 8 rotates around the center 9, the movable blade 8 performs a stroke motion back and forth.

The positioning lever 8b is fixed to the movable blade 8 and moves integrally with the movable blade 8 when the apparatus is moved. At this time, the positioning lever 8b moves within the long hole 9a of the fixed blade 9, but moves without contacting the inside of the long hole 9a.

The spacer guide hole 8 c of the movable blade 8 has a spacer 22 screwed to the blade cover 17 and the fixed blade 9.
Is stored, and the movable blade 8 slides along the outside of the spacer 22 .
By pacer guide hole 8c is moved, the movable blade 8
Can make a stroke movement in the front-rear direction without blurring left and right.

Next, a case where the trimming machine is used as a clipper from a hedge trimmer will be described with reference to FIGS. Movable blade 8 and fixed blade 9 for hedge trimmer
Are replaced with a movable blade 11 and a fixed blade 13 for hair clippers (see FIG. 11). Movable blade 11 and fixed blade 13 for clippers
First, the holes 13b and 13c of the fixed blade 13 are mounted on the shafts 18 and 19, respectively. The positioning lever 12a, which also serves as a height adjusting collar, is a fixed blade 1.
3 is fitted into the positioning long hole 13a. At this time, FIG.
As shown in (a), the eccentric cam 7a may be largely displaced from the cylindrical cam guide 12 which is pressed against the cam guide hole 11a of the movable blade 11.

Next, when the positioning lever 12a is moved downward in FIG. 16, the movable blade 11 rotates about the connecting pin 14, and reaches the state shown in FIG. 13C through the state shown in FIG. 13B. The eccentric cam 7a is fitted to the cam guide 12 (see FIG.
13 (c )), it can be used as a clipper. In this way, the eccentric cam 7a is easily and securely fitted to the cam guide 12, and can be used as a clipper. Also,
Your hands will not get dirty or hurt.

When the power switch is turned on after the eccentric cam 7a is fitted to the cam guide 12, the power of the driving motor 3 is reduced in the same manner as in the case of using the hedge trimmer.
The power is sequentially transmitted to the second gear 6 via the rotation shaft 3 a, the pinion gear 4, and the first gear 5. At this time, FIG.
As shown in FIG. 5, the clipper eccentric cam 7a is fitted in an elliptical cam guide 12 whose minor axis is substantially equal to the diameter of the clipper eccentric cam 7a. When the second gear 6 rotates, the clipper eccentric cam 7a Since the movable blade 11 rotates about the shaft 19, the movable blade 11 swings right and left around the pin 14 as a fulcrum.

At this time, the positioning lever of the hair clipper moves along the elongated hole 13a as in the case of the hedge trimmer. In addition, as described above, the case where the present invention is applied to the clipper / hedge trimmer combined reaper is described, but the present invention may be applied to a dedicated machine such as a clipper and a hedge trimmer. Further, the positioning lever may be a protruding piece obtained by simply cutting and raising a part of the movable blade.

[0025]

As described above, according to the combined reaper of the present invention, when the fixed blade and the movable blade are exchanged and the eccentric cam is not fitted in the cam guide hole of the movable blade, The movable blade moves simply by moving the positioning lever, and the eccentric cam fits into the cam guide hole of the movable blade, so that the position of the eccentric cam and the movable blade can be easily adjusted, and blade replacement is simplified. . Also, the hand does not become dirty with grease or the like because the eccentric cam and the movable blade do not need to be touched, and there is no need to hold the blade of the movable blade.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a clipper / hedge trimmer / combiner according to an embodiment of the present invention.

FIG. 2 is a perspective view of an eccentric cam.

FIG. 3 is a plan view of the eccentric cam.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is an enlarged sectional view of a main part of the mowing machine of FIG. 1;

6 is an enlarged sectional view of a main part showing a part of the mowing machine of FIG. 5;

FIG. 7 is a sectional view of a blade for a hedge trimmer.

FIG. 8 is an explanatory diagram showing a relationship between an eccentric cam and a movable blade.

FIG. 9 is a plan view of a fixed blade.

FIG. 10 is an explanatory diagram showing a moving direction of a movable blade.

FIG. 11 is an enlarged sectional view of a main part when a blade for a hair clipper is set.

FIG. 12 is an enlarged sectional view of a main part showing a part of the pruning machine of FIG. 11;

FIG. 13 is an explanatory diagram showing a relationship between a movable blade for a hedge trimmer and a fixed blade.

FIG. 14 is a sectional view taken along the line ZZ in FIG. 13 (c).

FIG. 15 is a rear view of the hedge trimmer of FIG. 13 in a set state of a movable blade and a fixed blade.

FIG. 16 is an enlarged view of a main part showing a part of the set state of FIG. 15;

[Explanation of symbols]

 3 ... Drive motor 4 ... Pinion gear 5 ... First gear 6 ... Second gear 7 ... Eccentric cam 7a ... Eccentric cam 7b ... Hedge trimmer eccentric cam 8,11 ... Movable blade 8a ... Cam guide holes 8b, 12a ... Positioning lever 9 , 13 ... fixed blade 9a, 13a ... positioning slot

Claims (1)

(57) [Scope of request for utility model registration] An eccentric cam is integrally provided on a gear for transmitting the rotational force of a driving motor, a cam guide hole in which the eccentric cam is fitted is provided on a movable blade, and a spacer guide hole is provided on the movable blade.
Or providing a spacer and a spacer or
Provide a spacer guide hole to connect the movable blade to the fixed blade.
Or by connecting the movable blade to a fixed blade via a connecting pin, thereby converting the rotational movement of the eccentric cam into a forward-backward movement or a swinging movement of the movable blade. A positioning slot extending in the direction of movement is provided on the fixed blade, a positioning lever is provided on the movable blade, the positioning lever is loosely inserted into the positioning slot, and the positioning lever is inserted along the positioning slot. The eccentric cam is fitted into the cam guide hole by moving the eccentric cam.