JP2715194B2 - Ultrasonic cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic cutting apparatus having a circular blade and ultrasonic vibration means for exciting the circular blade.

[0002]

2. Description of the Related Art Conventionally, in a non-excitation type cutting device,
The circular blade is rotated at a high speed, and cutting is performed by pressing an object to be cut, such as bread, confectionery or fruits and vegetables, against the rotating circular blade. However, in such a cutting device, the cut surface of the object to be cut easily adheres to the side surface of the blade, and a large amount of cutting debris is generated. In this case, there is a disadvantage that the cut portion is deformed or a part of the cut portion is damaged, and the cut portion is roughened, which impairs the commercial value.

[0003] In order to solve the above-mentioned problems in the non-exciting type cutting device, an ultrasonic cutting device has been developed. This device excites a circular blade body in its rotational direction to generate bending vibration. It is to cut.

[0004]

However, in the above-described conventional ultrasonic cutting apparatus, when vegetables such as onions and cabbage are cut in a ball shape, their inertia is larger than bread and cake. Therefore, there is a disadvantage that the reaction force applied from the cut surface of the object to be cut to the bending vibration of the blade body is large, and the cut surface is strongly hit by the blade body, and the cut end turns brown.

In view of the above, the present invention has been made in view of the above-mentioned drawbacks of the prior art, and is capable of performing accurate cutting while preventing adhesion of a cut object to a blade body and generation of cutting chips. It is another object of the present invention to provide an ultrasonic cutting device capable of preventing discoloration of a cut surface.

[0006]

SUMMARY OF THE INVENTION The present invention provides a circular blade,
A rotary drive source for rotating the circular blade, and an ultrasonic vibration unit for exciting the circular blade, wherein the ultrasonic vibration unit is configured to excite in a rotational direction at a rotation center of the circular blade. It was done.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An ultrasonic cutting apparatus according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, an ultrasonic cutting device 1 has a circular blade 2 which is driven to rotate in the direction of arrow R, and a cutting force 4 conveyed by a conveyor 3 is fed by a conveying force F by the conveyor 3. Is to be cut using The cuts 4 include breads, western confectionery, Japanese confectionery, fruits and vegetables, and the like.

FIG. 2 is a plan view (including a partial cross section) of the ultrasonic cutting apparatus 1. As is clear from the figure, a circular blade (hereinafter simply referred to as a blade) 2 is a horn 6. Are screwed to each other by a screw 7. Therefore, blade 2
Can be easily replaced.

The horn 6 is coupled to the vibrator 10 at an end surface opposite to the coupling surface with the blade 2. This vibrator 10
Is excited by the oscillator 11 to generate ultrasonic torsional vibration. The vibrator 10 is built in an inner rotating case 12, and the inner rotating case 12 is rotatably supported on a base 15 via a bearing 13. The inner rotating case 12 is rotationally driven by applying a torque from a motor 20 through a torque transmitting means including a pair of belt wheels 16, 17 and a belt 18 wound around the belt wheels. The motor 20 and the torque transmitting means are collectively referred to as a rotary drive source.

The horn 6 is connected to one end of an inner rotating case 12 via a flange 6a, and the horn 6 and the blade body 2 are rotated by the rotation of the inner rotating case 12. Rotate.

The other end of the inner rotating case 12 has
The two ring-shaped electrodes 22 and 23 are fixed to each other with an insulator 24 interposed therebetween.
0a. Brushes 26 and 27 are in sliding contact with the ring-shaped electrodes 22 and 23, respectively. Exciting power from the oscillator 11 is supplied to both the brushes 26 and 27 and is always supplied to the vibrator 10.

The horn 6 is for transmitting the ultrasonic torsional vibration generated when the vibrator 10 is excited to the center of rotation of the blade body 2 by increasing its amplitude. Then, as shown in FIG. 3, the vibration direction 29 of the ultrasonic torsional vibration coincides with the rotation direction of the blade body 2. The diameter D of the blade body 2 is
Since the resonance length of the vibration in the rotation direction of the blade body based on the ultrasonic torsional vibration transmitted from the blade 6 is determined, the blade body 2 is, for example, torsionally vibrated in the secondary mode as is apparent from FIG. Is generated. As shown in the figure, in this embodiment, the nodal position of the torsional vibration occurs at another position in addition to the rotation center of the blade body 2. The vibration frequency is 10Hz-100k
Hz can be considered, but especially 10 kHz to 60 kHz.
z is desirable. Incidentally, in this example, when the diameter of the blade body 2 was set to 303 mm and the thickness was set to 1.5 mm, good results were obtained when the vibration frequency was set to about 20.5 kHz. In this case, the amplitude is 30 at the cutting edge.
μmp-p.

Next, the operation of this embodiment having the above configuration will be described.

First, when the inner rotating case 12 is driven to rotate by the motor 20 shown in FIG.
Rotate together. At the same time, an excitation current from the oscillator 11 is applied to the vibrator 10 to generate ultrasonic torsional vibration. As a result, the blade body 2 is torsionally vibrated in the secondary mode in the rotation direction. Therefore, as shown in FIG. 1, the cut object 4 is pressed against the blade body 2 by the conveying force F of the conveyor 3 and cut, and the sharpness is sharpened by the torsional vibration. Therefore, adhesion of the cut object to the blade body 2 and generation of cutting chips are suppressed, and moreover, good cutting is performed without breaking the cut edge. Further, even when the cut material 4 is a vegetable such as onion or cabbage, such a smooth cutting is performed, and the blade body 2 does not hit these cut surfaces because of the torsional vibration. Discoloration of the cut surface is prevented.

[0016]

As described above, according to the present invention, it is possible to prevent the cut object from sticking to the blade body and to prevent the generation of cutting chips, to cut without breaking the cut, and to rotate the circular blade body. When the vegetables are cut because they are excited in the direction, the blade does not hit the cut surface, and there is an effect that discoloration of the cut surface can be prevented. In addition, since the vibration direction of the blade is the direction of pushing and pulling the object, the attachment of the object to the blade can be effectively suppressed, and the cutting resistance can be extremely reduced.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an ultrasonic cutting device according to the present invention and a belt conveyor used together with the ultrasonic cutting device.

FIG. 2 is a plan view including a partial cross section of the ultrasonic cutting apparatus shown in FIG.

FIG. 3 is a view on arrow AA of FIG. 2;

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Ultrasonic cutting device 2 Circular blade 4 Cutting object 6 Horn 10 Vibrator 11 Oscillator 12 Inner rotating case 20 Motor

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-212097 (JP, A) JP-A-57-181067 (JP, U) JP-B-18-18648 (JP, B1) JP-B-34 1798 (JP, B1)

Claims (1)

(57) [Claims] 1. A circular blade body, a rotary drive source for rotating the circular blade body, and ultrasonic vibration means for exciting the circular blade body, wherein the ultrasonic vibration means rotates the circular blade body. An ultrasonic cutting device characterized in that it is configured to be excited in a rotational direction at a center.