JPH05228894A - Frozen food cutting utensil - Google Patents

Abstract

PURPOSE:To generate a frictional heat due to vibration in a contact part between a working tool and a cut workpart, thereby making frozen foods cuttable so well by clamping an ultrasonic vibrator to the working tool, feeding this with high frequency power, and generating an ultrasonic vibration of less than the specific frequency. CONSTITUTION:In a working tool cutting frozen foods, an ultrasonic vibrator is clamped to this working tool, forming a solid vibrarion system there. In addition, ultrasonic power is fed to this vibration system, through which an ultrasonic vibration of less than 200kHz is generated in this working tool. A frictional heat due to vibration is thereby generated in a contact part between the working tool and a cut work part, whereby cutting progresses as partially thawing a cut most tip part alone. For example, an ultrasonic vibrator 2 is attached to an edge 1 of a kitchen knife, and a pipe is covered on this vibrator, setting it down to a haft 3. In succession, the ultrasonic power is supplied with a high frequency generator 4, and the ultrasonic vibration is generated in the vibration system consisting of the edge 1 and the vibrator 2. With this constitution, the frozen food is cut in a favorable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cutting food such as frozen meat and fish.

[0002]

2. Description of the Related Art Conventionally, a saw has been used to cut frozen foods such as meat and fish in a frozen state. Further, when cutting with a knife or knife without using a saw, foods such as frozen meat and fish are thawed or semi-thawed before cutting.

[0003]

However, when cutting with a saw, although the cutting can be performed in the frozen state, a cutting margin corresponding to the thickness of the saw blade is discharged as chips. Therefore, in a food factory or the like that processes a large amount of food, the chips have been a problem in terms of material utilization efficiency and working environment. Some large slicers for the food industry can cut frozen meat at about -6 ° C. In this case, a thick blade is used to cut the meat so that the meat is cut into pieces. However, there were problems such as low yield. When cutting with a knife or knife, the frozen food such as meat or fish must be thawed or semi-thawed before cutting, but once frozen food is thawed once it is frozen again. However, there is a property that the freshness cannot be maintained. For this reason, the frozen blocks thawed at the time of cutting must all be used within the shortest possible time, and it is not possible to cut off only the necessary amount and store the rest in the frozen state for a long time. It was possible.

[0004]

[Object] Accordingly, it is an object of the present invention to provide a frozen food cutting instrument that can cut frozen food such as meat and fish in a frozen state without wasting material.

[0005]

In order to achieve the above object, the present invention comprises the following technical means. That is, a knife such as a knife or knife for cutting food, a metal belt, a metal thin wire, or a rotatable metal disk is fixed to an ultrasonic transducer that generates ultrasonic vibrations. An integrated vibration system is formed, and high-frequency power is supplied from a high-frequency oscillator to this to generate ultrasonic vibrations in the work tool. When you try to cut frozen food using this processing tool,
Since frictional heat due to vibration is generated at the contact portion between the processing tool and the object to be cut, the contact portion is slightly thawed by the heat.
Then, almost at the same time as the thawing, the contact portion is cut by the processing tool, and the next thawing / cutting action proceeds. That is, since only the portion where the processing tool comes into contact with the object to be cut is thawed and cut, the frozen food can be cut without difficulty. Note that the frictional heat generated at the cutting portion during cutting is sequentially absorbed by the food itself as the processing tool progresses, so if the temperature of the frozen food is sufficiently low, the cut portion immediately returns to the frozen state. obtain.

[0006]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a knife for cutting frozen food according to the present invention. Resonant frequency 28k on blade 1 of knife with 9.2cm length
The PZT ultrasonic oscillator 2 of Hz is attached by brazing, and a vinyl chloride pipe is covered on the ultrasonic oscillator 2 to form the handle 3. And the oscillation frequency is 28 kHz
High frequency power is supplied from a high frequency oscillator 4 having z and an output of 50 W, and ultrasonic vibration is generated in a vibration system configured by the blade 1 and the vibrator 2. Using this knife, -40 ℃, thickness 2
When cm beef was cut, good cutting was possible in a frozen state.

[0007]

Embodiment 2 FIG. 2 shows a frozen food cutting machine according to the present invention. A PZT ultrasonic transducer 6 having a resonance frequency of 20 kHz is attached to one end of a stainless plate 5 having a length of 25 cm, a width of 2 cm and a thickness of 0.3 mm by brazing to form a vibration system, and a tensile force of 10 kgf is applied to the stainless plate 5. The both ends are held by the bow-shaped holder 7. Furthermore, an air cylinder 8 that causes the bow-shaped holder 7 to move up and down.
The table 9 on which the frozen food is placed, and the high frequency oscillator 10 having an oscillation frequency of 20 kHz and an output of 150 W constitute the device. Then, a high-frequency power is supplied to this by a high-frequency oscillator 10 to generate ultrasonic vibrations in a vibrating system composed of a stainless plate 5 and a vibrator 6, and a stainless plate held by a bow-shaped holder 7 by an air cylinder 8. 5 is moved up and down at a stroke number of 60 cm / min and a stroke length of 5 cm with respect to the table 9. When the frozen food is placed on the table 9 and gently fed so as to be pressed against the stainless plate 5, the food is cut while being thawed only at the contact portion with the stainless plate 5. When beef with a thickness of 10 cm and a temperature of -40 ° C was cut using this apparatus, good cutting was possible in a frozen state.

[0008]

Third Embodiment FIG. 3 shows a frozen food cutting machine according to the present invention. As shown in the figure, the bow-shaped holder 11 has five diameters of 0.
A 2 mm piano wire 12 is fixed, a tensile force of 10 kgf is applied, and a PZT ultrasonic vibrator 13 having a resonance frequency of 100 kHz is attached to one end to form a vibration system. further,
The bow-shaped holder 11 is provided with an air cylinder 14 that moves up and down, a table 15 on which frozen food is placed, and a high-frequency oscillator 16 with an oscillation frequency of 100 kHz and an output of 150 W, to configure the device. Then, high frequency power is supplied to the vibrator 13 by the high frequency oscillator 14 to generate ultrasonic vibrations in the respective piano wires 12, and the air cylinder 14 makes the piano wires 100 strokes per minute and the stroke length with respect to the table 13 is 5 cm. Move up and down with. On this table 15, -40 ℃, thickness 10c
When m of beef was placed and pressed against a vertically moving piano wire while ultrasonically vibrating, good cutting could be performed in a frozen state.

[0009]

[Embodiment 4] FIG. 4 shows a frozen food cutting machine according to the present invention. As shown in the figure, a PZT having a resonance frequency of 28 kHz is placed at the center of a stainless disk 17 having a diameter of 18 cm and a thickness of 1 mm.
An ultrasonic oscillator 18 is attached to form a vibration system. A motor 19 for rotating the vibration system is connected to the vibration system, and a table 20 on which frozen food is placed, and a high frequency oscillator 21 having an oscillation frequency of 28 kHz and an output of 100 W are attached to configure the device. And the oscillator 16
Then, high frequency power is supplied from the high frequency oscillator 21 to generate ultrasonic vibration in the stainless steel disk 17, and the entire vibration system is rotated by the motor 19. -40 on table 20
When a beef with a thickness of 5 cm and a thickness of 5 cm was placed and pressed against a stainless steel disk 17 rotating at a rotation speed of 200 rpm while vibrating ultrasonically, good cutting was possible in a frozen state.

[0010]

As described above, according to the present invention, foods such as meat and fish frozen by the present invention can be easily cut in a frozen state without wasting material.

[Brief description of drawings]

FIG. 1 is an explanatory view of a knife for cutting frozen food used in Example 1.

2 is an explanatory view of a frozen food cutting machine used in Example 2. FIG.

3 is an explanatory view of a frozen food cutting machine used in Example 3. FIG.

4 is an explanatory view of a frozen food cutting machine used in Example 4. FIG.

[Explanation of symbols]

1 ... Knife blade, 2 ... Ultrasonic transducer, 3 ... Handle, 4 ... High frequency oscillator, 5 ... Stainless steel plate, 6 ... Ultrasonic transducer, 7 ... Bow holder, 8 ... Air cylinder, 9 ... Table, 1
0 ... High frequency oscillator, 11 ... Bow holder, 12 ... Piano wire, 13 ... Ultrasonic transducer, 14 ... Air cylinder, 1
5 ... table, 16 ... high frequency oscillator, 17 ... stainless steel disc, 18 ... ultrasonic transducer, 19 ... motor, 20 ...
Table, 21 ... High frequency oscillator

Claims (5)

[Claims] 1. A tool for cutting food such as meat and fish in a frozen state, wherein an ultrasonic vibrator is fixed to the processing tool to form an integrated vibration system, and high frequency power is supplied to the processing tool to process the processing tool. By generating ultrasonic vibration of 200 kHz or less, frictional heat due to vibration is generated at the contact part between the processing tool and the object to be cut at the time of cutting, and the heat causes cutting while partially thawing only the cutting edge part. Frozen food cutting instrument characterized by advancing. 2. The frozen food cutting instrument according to claim 1, wherein the processing tool is a knife such as a knife and a knife. 3. The frozen food cutting instrument according to claim 1, wherein the processing tool is a metal belt having a thickness of 1 mm or less. 4. The processing tool is a piano wire, hard steel wire or other metal wire having a diameter of 1 mm or less.
The frozen food cutting device described. 5. The frozen food cutting instrument according to claim 1, wherein the processing tool is a rotatable metal disk driven by a rotary actuator.