JPS5920033Y2 - electric twig cutter - Google Patents

Description

[Detailed description of the invention] This invention relates to an electric twig cutter used for fruit thinning work in fruit tree cultivation. An object of the present invention is to provide a twig cutter with increased cutting force by applying inertial force.

Conventionally, in order to streamline the process of thinning fruits such as plums, an electric twig cutter with a rotary cutting blade installed at the tip of a cylindrical body case that houses a motor, etc., has been introduced instead of pruning shears. equipment is used.

However, with the structure described above, the cutting blade rotated by a motor hits the fruit twig and cuts it with an impact due to the inertia of the drive unit, that is, the inertia of the cutting blade, so it is difficult to cut fibrous twigs. If you don't hit the cutting blade at the right time, you won't be able to cut the twigs sharply, and if you don't hit the cutting blade at the right time, the cutting blade will bite into the twig and stop rotating, making it impossible to thin the fruit.

In order to solve the above-mentioned drawbacks, this invention provides a large inertial force to the cutting blade by forming a pair of weight parts at the rear of the lower surface of the long cutting blade in the direction of rotation in symmetrical positions with respect to the rotation axis. It is something.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 is a cylindrical main body case consisting of a large-diameter base end forming a handle 2 and a small-diameter tip 3 to avoid hitting the fruit. are removably connected by a threaded portion 4.

A battery 4, a motor 5, etc. are housed inside the handle 2, and a battery exchange port 6 at the bottom is closed with a battery cover 8 having a conductive spring member 7 for holding the battery.

Reference numeral 9 denotes a bearing body 10 fixed within the tip portion 3 of the main body case 1.
A rotary drive shaft is supported on the drive shaft 9 and protrudes from the tip 3. A long cutting blade 12 is connected to the rotary shaft 15 of the motor 5 via a washer 13 by a screw 11 or the like at the tip of the drive shaft 9.
is connected to.

This connecting member 14 is bendable in order to prevent the impact force applied to the cutting blade 12 from being directly transmitted to the motor 5 when cutting a twig.

Further, on the lower surface of the cutting blade 12, a pair of weight parts 16.16 are attached to the rotational drive shaft 9 at the rear in the rotational direction, that is, on the opposite side of the blade tip 12a, in order to apply a large inertia force when the cutting blade 12 rotates. It is formed in a symmetrical position.

As shown in Figs. 1 and 2, this weight part 16.16 may be fixed to a separate metal piece by welding, caulking, pressure bonding, screwing, or other fixing methods. 12
may be formed integrally by deforming it in the thickness direction by pressing, and furthermore, as shown in FIG. That is, it may be bent as shown in Figure b, and this bent portion may be used as the weight portion.

FIG. 4 also shows another embodiment of the weight part provided on the cutting blade 12, in this case a through hole 12 bored at the rear of the cutting edge 12a.
After inserting the rivet 17 into C, the tip 17a of the rivet 17 protruding from the through hole 12C is crushed and fixed.
This part is used as the weight part.

Reference numeral 18 designates a blade cover having a hanging piece 18a and a bent part 18b bent inward from the tip of the hanging piece 18a. After engaging the cut groove 19a provided in the blade cover mounting base 19 fixed to the top of the tip 3 of the
It is attached to the tip 3 of the main body case 1 by inserting it into the hole 9b and tightening it.

21 is a tongue piece for introducing a twig, and 22 is a power switch.

According to this invention having the above structure, a pair of weight parts 16, 16 are formed on the lower surface of the cutting blade 12 to apply a large inertia force when the cutting blade 12 rotates, so that the cutting blade 12 can be attached to a twig. Fibrous twigs can be cut sharply just by applying it.

Furthermore, since the pair of weight portions 16.16 are formed at the rear in the rotational direction of the cutting blade 12 and at symmetrical positions with respect to the rotation axis 9, all the inertia of the weight portions 16.16 acts as a cutting force, and The cutting blade 12 does not tilt due to the high speed rotation of the blade 12, and can always maintain an equilibrium state.

Note that, as in the above embodiment, if the rotary blade 12 provided with the weight portion 16.16 and the motor 5, which is the drive source, are connected via the coiled spring-like elastic connecting member 14, the actual cutting time will be reduced. The cutting impact timing of the rotary blade 12 is synchronized with this timing when there is no load, and the motor 5 that precedes when there is a load is synchronized with this timing.
The inertia timing of the weight part 1 is temporarily separated, and the weight part 1
An impact force of 6.16 can be effectively applied.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of an electric twig cutter which is an embodiment of the present invention, Fig. 2 is an exploded perspective view of the head of the same embodiment, and Figs. 3 and 4 are diagrams of other embodiments. 1 is an explanatory view showing before the part that will become the weight part is formed, and b is an explanatory view after the part is formed. 1... Main body case, 9... Rotating shaft, 1
2... Cutting blade, 16... Weight part.

Claims (1)

[Scope of utility model registration request] In an electric twig cutter having a rotary cutting blade 12 at the tip of a cylindrical main body case 1, a pair of weight parts 16 and 16 are placed at symmetrical positions with respect to the rotation axis 9 at the rear of the lower surface of the long cutting blade 12 in the direction of rotation. An electric twig cutter characterized by having the following features: