JP2551081Y2 - Clipper / hedge trimmer combined use cutter - 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 for cutting branches and leaves, and cutting turfgrass and tea leaves, and more particularly to a clipper / hedge trimmer combined cutting machine.

[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.

As described above, conventionally, a dedicated machine such as a clipper and a hedge trimmer has been selectively used depending on the application. However, a pruning machine that combines the use of a clipper and a hedge trimmer has been proposed. In order to use both the clipper and the hedge trimmer, the eccentric distance of the eccentric cam is set to an intermediate size between the clipper and the hedge trimmer of the dedicated machine. The blades for the clippers and the blades for the hedge trimmer are exchanged for use.

As shown in FIG. 16, an eccentric cam 16 is formed integrally with a lower surface of a disc-shaped final gear 15.
As shown in FIGS. 17 and 18, the center of each disk is set at a fixed distance from the center of the final gear 15, that is, at the position of the eccentric distance L '.

However, when this trimming machine is used as a hedge trimmer, the eccentric distance L 'becomes shorter than the hedge trimmer of the dedicated machine, and as shown in FIG.
If the interval W between c and 9d is the same as that of the dedicated hedge trimmer, the cutting edge 8d of the movable blade 8 does not move to the intermediate portion between the cutting edges 9c and 9d, and the cutting performance is reduced. Therefore, if the distance W between the fixed blades 9 is shortened so that the movable blade 8 moves to the intermediate portion of the fixed 9 blades while keeping the eccentric distance L ', it becomes difficult to cut thick branches.

When this trimming machine is used as a gardening clipper, the eccentric distance is longer than that of a dedicated clipper, and the amplitude of the movable blade swinging to the left and right is increased. Therefore, it is necessary to increase the interval between the fixed blades. is there. Such a large moving distance of the movable blade means that the time during which the movable blade does not exist on the fixed blade, which is a shearing region, becomes longer, and the cutting ability of grass and the like is reduced.

[0008]

As described above, in the conventional eccentric cam of the clipper / hedge trimmer combined use eccentric cam, the eccentric distance is set to an intermediate value between the eccentric distances of the clipper and the hedge trimmer. There has been a problem that the cutting ability of turfgrass, branches and leaves, etc. is reduced.

The present invention has been made in view of such circumstances, and an object thereof is to provide a clipper and hedge trimmer combined use cutter which can secure the same cutting performance as a dedicated machine such as a clipper and a hedge trimmer.

[0010]

In order to solve the above-mentioned problems, a clipper / hedge trimmer combined cutter of the present invention comprises a first eccentric cam and a second eccentric cam on the bottom surface of a gear for transmitting the rotational force of a driving motor. Are set in two stages, and the eccentric distance between the first eccentric cam and the second eccentric cam with respect to the rotation center of the gear is set to a predetermined distance, respectively. The movable blade for the hair clipper and the movable blade for the hedge trimmer are selectively engaged so that it can be used for both the clipper and the hedge trimmer.

[0011]

As described above, the first eccentric cam and the second eccentric cam are provided on the bottom surface of the gear transmitting the torque of the driving motor.
Since the eccentric distances of the first eccentric cam and the second eccentric cam with respect to the rotation center of the gear are set to predetermined distances, respectively, when used as clippers, A first eccentric cam having an eccentric distance set for a clipper is fitted into the guide hole of the movable blade,
Shears lawns etc. in cooperation with fixed blades. On the other hand, when used as a hedge trimmer, the movable blade and the fixed blade for the clipper are replaced with a movable blade and a fixed blade for the hedge trimmer, and the eccentric distance is set in the guide hole of the movable blade for the hedge trimmer for the hedge trimmer. The fitted second eccentric cam is fitted to shear the branches and leaves.

[0012]

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 R for reducing the number of rotations of the drive motor 3 includes a pinion gear 4 mounted on a rotation shaft 3 a of the drive motor 3 and a pinion gear 18 meshed with the pinion gear 4.
And a second gear 6 that meshes with the first gear 5 and rotates about a shaft 19.

The rotational movement of the driving motor 3 is controlled by the movable blade 8.
A motion conversion mechanism M for converting the stroke movement of the eccentric cam 7 is formed integrally with the bottom surface of the second gear 6.
When the guide hole 8a and the positioning of the eccentric cam 7 is fitted
And a movable blade 8 having a lever 8b . Also,
The positioning lever of the movable blade 8 is a guide hole 9 of the fixed blade 9.
a.

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

As shown in FIG. 2, the eccentric cam 7 has a disc-shaped eccentric cam 7a integrally formed on 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.
The center of the second gear 6 has an eccentric distance L ₂ 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
It is.

Next, the case where this pruner is used as a hedge trimmer will be described with reference to FIGS.
Movable blade 8 and fixed blade 9 for hedge trimmer and blade cover 17
As shown in FIG. 7, the movable blade is movably assembled by the spacer 8c and the screw as shown in FIG. 7, and the positioning lever 8b of the movable blade is fitted in the guide hole 9a of the fixed blade 9 as shown in FIG.

In this state, as shown in FIG. 5, the blade is attached to the trimming machine main body. At this time, the eccentric cam 7b for the hedge trimmer is set so as to fit into the guide hole 8a of the movable blade 8.
When the power switch (not shown) is turned on after the setting of the main body and the cutter in this manner, the driving motor is transmitted to the pinion gear 4 via the rotating shaft 3a, and further the second gear 6 is transmitted via the first gear 5. And the second gear 6 rotates. At this time, as shown in FIG. 7, the hedge trimmer eccentric cam 7b fits into a cross-shaped guide hole 8a having a width substantially equal to the diameter of the hedge trimmer eccentric cam 7b and a width wider than this. ing. Therefore, when the second gear 6 rotates, the eccentric cam 7b for hedge trimmer rotates about the shaft 19, so that the movable blade 8 makes a stroke motion back and forth.

The spacer 8c is screwed to the blade cover 17 and the fixed blade 9, and when the guide hole (not shown) of the movable blade 8 moves outside the spacer 8c, the left and right movement of the movable blade is reduced. I'm preventing.

The spacer 8c facilitates the movement of the movable blade 8 by providing a small gap between the fixed blade 9 and the movable blade 8. Thus, the movable blade 8 on the fixed blade 9
In this case, the cutting edge 8d of the movable blade 8 moves from the center of the cutting edge 9c of the fixed blade 9 to the center of the cutting edge 9d by a distance H as shown in FIG. Obtained . Next, a case where the pruner is used as a clipper will be described with reference to FIGS.

The movable blade 8 and the fixed blade 9 for the hedge trimmer are replaced with the movable blade 11 and the fixed blade 13 for the clippers (see FIG. 10). The clipper eccentric cam 7a is set so as to be fitted to the cam guide 12 fixedly pressed into the guide hole 11a of the movable blade 11. At this time, the positioning lever 12a of the cam guide 12 is fitted into the guide hole 13a of the fixed blade 13 as shown in FIG.

The movable blade 11 has a fixed blade 13 and a pin 14.
And a pin stop 14a. When the power switch is turned on after the cutter is set on the trimming machine body in this manner, the power of the driving motor 3 is sequentially turned on the rotating shaft 3 as in the case of using the hedge trimmer.
a, to the second gear 6 via the pinion gear 4 and the first gear 5. At this time, as shown in FIG. 12, the clipper eccentric cam 7a is fitted on an elliptical cam guide 12 whose minor axis is substantially equal to the diameter of the clipper eccentric cam 7a. Since the eccentric cam 7a rotates eccentrically about the shaft 19,
The movable blade 11 swings left and right with the pin 14 as a fulcrum.

Thus, the movable blade 1 on the fixed blade 13
The lawn and the like are mowing by the swinging motion of 1. However, at this time, the movable blade 11 swings right and left with an appropriate amplitude, and a sufficient mowing ability can be obtained.

As described above, according to the clipper / hedge trimmer combined use cutter, it is possible to use the clipper and the hedge trimmer having the same cutting performance as the dedicated machine by simply changing the blade.

[0025]

[Effects of the Invention] As described above, according to the clipper / hedge trimmer combined reaper of the present invention, a single reaper can ensure the same cutting performance as a dedicated machine such as a clipper and a hedge trimmer.

[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 trimming machine of FIG. 1 when a hedge trimmer is set.

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

FIG. 7 is a plan view showing a set state of a hedge trimmer blade.

FIG. 8 is a side view showing a set state of a hedge trimmer blade.

FIG. 9 is an explanatory diagram showing a positional relationship between a movable blade and a fixed blade.

FIG. 10 is an enlarged sectional view of a main part of the cutter of FIG. 1 when a blade for a clipper is set.

FIG. 11 is an enlarged sectional view showing a main part of a part of the pruning machine of FIG. 10;

FIG. 12 is an explanatory view showing a set state of a movable blade and a fixed blade for a hedge trimmer.

FIG. 13 is a sectional view taken along the line ZZ in FIG. 12;

FIG. 14 is a rear view of the movable blade and the fixed blade for the hedge trimmer of FIG. 12 in a set state.

15 is an enlarged view of a main part showing a part of the set state of FIG. 14;

FIG. 16 is a perspective view of a conventional eccentric cam.

FIG. 17 is a plan view of the eccentric cam.

18 is a sectional view taken along the line YY in FIG.

FIG. 19 is an explanatory diagram showing a positional relationship between a movable blade and a fixed blade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 ... Drive motor 3a ... Rotating shaft 4 ... Pinion gear 5 ... First gear 6 ... Second gear 7 ... Eccentric cam 7a ... Eccentric cam for hair clipper 7b ... Eccentric cam for hedge trimmer 8 ... Movable blade 9 ... Fixed blade

Claims (1)

(57) [Scope of request for utility model registration] 1. A first eccentric cam and a second eccentric cam are superposed in two stages on a bottom surface of a gear for transmitting a rotational force of a driving motor, and the first eccentric cam and the second eccentric cam are connected to each other. An eccentric distance between the eccentric cam and the second eccentric cam is set to a predetermined distance, and a movable blade for a clipper and a movable blade for a hedge trimmer are selectively engaged with each stage of the eccentric cam,
A clipper / hedge trimmer combined use trimming machine characterized in that it can be used for both a hair clipper and a hedge trimmer.