JPH02116498A - Cutting device - Google Patents

Abstract

PURPOSE:To cut the cake, etc., at whose inner part or on whose upper face a strawberry, walnut, etc., exist without any inconvenience by exciting a cutting knife by an exciting body fitting a piezoelectric element to the elastic plate and reciprocating the cutting knife at small stroke. CONSTITUTION:The output frequency of an AC power source device is adjusted in about 200Hz and the output thereof is impressed on a piezoelectric element. A bimorph 2 is then deflected and vibrated by repeating the deflection movement of one part of the piezoelectric element 4 being elongated by a positive cycle and the other part of the piezoelectric element 4 contracted, and by a negative cycle one part of the piezoelectric element 4 being contracted and the other part of the piezoelectric element elongated, for example. By the deflection vibration of the bimorph 2 the cutting knife 10 is then excited and moved reciprocally. In this case, the amplitude of the bimorph 2 becomes about 0.1mm and the moving stroke of the cutting knife 10 about 0.1mm as well. When the cutting knife 10 is pressed to a commodity by having a base frame 1 by hand after setting in this state, this commodity is cut by the small reciprocating movement of the cutting knife 10.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a cutting device for cutting articles.

(Prior art) Conventionally, when cutting foods such as cakes, a knife is manually operated, or when cutting a large amount of food, a circular cutting blade rotated by a motor is used. As shown in Japanese Patent No. 63-196397, it is common practice to use a linear blade that is reciprocated by a motor.

(Problems to be Solved by the Invention) However, for example, if there are strawberries, walnuts, raisins, etc. inside or on the top of a cake, cutting the cake with a conventional knife or a blade moved by a motor will result in cutting. Due to the movement of the blade of time, there were problems where these objects would peel off from the cake or sink into the cake.

Accordingly, an object of the present invention is to provide a cutting device in which a large moving force is not applied to the article when cutting the article, and the article itself is not moved.

[Structure of the Invention] (Means for Solving the Problems) The present invention is characterized in that a vibrating body formed by attaching a piezoelectric element to an elastic plate is provided, and a cutting blade is provided which is excited by the vibrating body. It is something to do.

(Function) According to the above-mentioned means, the cutting blade is excited by the piezoelectric element and moves back and forth through minute strokes, but since the movement of the cutting blade is minute, it is certain that the article itself is moved during cutting. is prevented.

(Example) An example of the present invention will be described below with reference to the drawings.

3 is a base frame made of a strip-shaped steel plate, and mounting portions 1a are formed at both ends of the base frame. Reference numeral 2 denotes a bimorph vibrating body, which is constructed by attaching piezoelectric elements 4 to both sides of a band-shaped thin elastic plate 3 by, for example, adhesion. In this case, the piezoelectric element 4 is made of, for example, lead zirconate titanate ceramics. One end of the elastic plate 3 of such a bimorph 2 is fixed to the mounting portion 1a of the base frame 1 with a mounting screw 6 via a contact plate 5, respectively.

Reference numeral 7 denotes a support, and these are provided with a mounting portion 7a and a tooth fixing portion 7b, respectively. These mounting portions 7a are then attached to the elastic plates 3 of the bimorph 2 using mounting screws 9 via the contact plate 8.
It is fixed with a screw at the other end. Reference numeral 10 denotes a cutting blade, and both ends of this blade are fixed to the blade mounting portion 7b of the support 7 via a contact plate 11 with mounting screws 12.

Although not shown, an AC power supply device that supplies AC power to Bimorph 2 is provided, which includes a frequency variable circuit to vary the output frequency and a waveform shaping circuit to shape the output waveform into a sine wave. , and a voltage adjustment circuit for adjusting the output voltage, and is operated using a commercial AC power source as input. The frequency variable range of this AC power supply device is 60 to 300 Hz, and the voltage variable range is 0 to 250V.

Next, the operation of the above configuration will be explained. The output frequency of the AC power supply device is adjusted to around 200 Hz, and the output is applied to the piezoelectric element 4. Then, for example, in a positive half cycle, one piezoelectric element 4 extends and the other piezoelectric element 4 contracts, and in a negative half cycle, one piezoelectric element 4 contracts and the other piezoelectric element 4 extends. By repeating this, the bimorph 2 makes repeated vibrations. Then, the cutting blade ]0 is excited and reciprocated by such bending vibration of the bimorph 2. In this case, the vibration amplitude of the bimorph 2 itself is several microns, but if the output frequency of the AC power supply given to the bimorph 2 is adjusted by 1 to a frequency that resonates with the base frame 1, the whole becomes in a resonant state and the vibration amplitude decreases. suddenly increases, the vibration amplitude of the bimorph 2 becomes about 0.1 mm, and the movement stroke of the cutting blade 10 reciprocated by the bimorph 2 also becomes about 0.1 mm. Once set in this condition, hold the base frame 1 by hand and insert the cutting blade 1.
When the cutting blade 1 is pressed against the object, the object is pressed against the cutting blade 1.
It is cut by a minute reciprocating movement of 0.

In the above embodiment, strawberries, (
When cutting an article such as a cake containing walnuts, raisins, etc. with the cutting blade 10, when the cutting blade 10 hits a strawberry, etc. and cuts it, a large moving force is applied to the strawberry, etc. Since this does not occur, there will be no problems such as the strawberries falling off from the cake or sinking into the cake.

If the type of cutting blade 10 is selected, it can be used not only for cutting foods such as cakes and breads but also for water use. Although the base frame 1 has been described as an example of being held and used by hand, the base frame 1 may be attached to the hand of a robot, or the base frame 1 itself may constitute a part of the robot.

In addition, as the vibrating body, not only a bimorph but also a monomorph in which a piezoelectric element is attached to only one side of an elastic plate can be used, and other changes can be made as appropriate without departing from the gist.

[Effects of the Invention] As is clear from the above description, the present invention is characterized in that a vibrating body is provided with a piezoelectric element attached to an elastic plate, and a cutting blade is provided which is excited by the vibrating body. Therefore, the cutting blade is excited by the piezoelectric element and reciprocated in minute strokes, and since the movement of the cutting blade is minute, no large moving force is applied to the article, and therefore the article itself is This has the excellent effect of reliably preventing movement during cutting.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway front view, and FIG. 2 is a side view. 1 is a base frame, 2 is a bimorph (vibrator), 4 is a pressure-type element, 7 is a support, and 0 is a cutting blade.

Claims (1)

[Claims] 1. A cutting device comprising a vibrating body formed by attaching a piezoelectric element to an elastic plate, and a cutting blade excited by the vibrating body.