JP2001105390A - Ultrasonic cutter device with howl prevention mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic cutter device allowing prevention of generation of howl sound caused by chatter vibration of a vibration body. SOLUTION: This ultrasonic cutter device having a vibration body that is a blade body 1; ultrasonic excitation means 2, 4 exciting the blade body 1, provided at one end of the blade body 1; energy conversion means 2, 4 consuming and absorbing vibration energy, provided at the other end of the blade body 1; and a howl prevention mechanism preventing a howl generated by vibration of the blade body 1. The howl prevention mechanism prevents the howl generated from the blade body 1 by partially pressing both side surfaces of the blade body 1 with soft urethane foam materials 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic cutter device suitable for cutting confectionery, food, and the like, and more particularly, to an ultrasonic cutter device provided with a growl prevention mechanism for preventing noise such as growl generated from the ultrasonic cutter device. To an ultrasonic cutter device.

[0002]

2. Description of the Related Art A conventional ultrasonic cutter device cuts confectionery (eg, roll cake, castella, etc.), food, etc. by generating a traveling wave due to flexural vibration on a blade as a vibrating body and regularly vibrating the blade. It is to be processed.

FIG. 3 is a front view of a conventional ultrasonic cutter apparatus for cutting a confectionery, food or the like by generating a traveling wave due to flexural vibration on a blade 1 as a vibrating body.
FIG. 1 is a perspective view of a conventional ultrasonic cutter device that cuts confectionery, food, and the like by generating a traveling wave due to flexural vibration on a blade body 1 as a vibrating body.

As shown in FIGS. 3 and 4, the conventional ultrasonic cutter device includes a blade body 1 as a vibrating body including two blades having upper and lower blades.

The blade body 1 has a length of about 600 mm, a width of 3 mm to 10 mm, and a thickness of 0.3 mm to 1 mm. Have been. The blade 1 as a vibrating body includes a horn 2
The mounting holes located at both ends of the blade body 1 are inserted into the threaded portions at the ends of the blades 1 and fastened and fixed with nuts 9.

Further, the horn 2 is also connected to a vibrator 4 on the opposite side of the tip end portion fixing the blade body 1. The vibrator 4 is formed of a bolted Langevin type vibrator (BLT) having a resonance frequency of 20 KHz.

The horn 2 and the vibrator 4 have a flange portion 2 b formed on the horn 2 fixedly supported by a holder 6 by a hexagonal bolt 20. Further, the holder 6
Are fastened and fixed on the gantry 7.

An ultrasonic oscillator 5 is connected to the electrode 4a of the vibrator 4. The ultrasonic oscillator 5 excites the vibrator 4 to generate ultrasonic vibration. The horn 2 mechanically amplifies the vibration generated by the vibrator 4 to generate flexural vibration on the blade 1 as the vibrator.

A horn 2 for absorbing the vibration energy of the wave propagated by the blade 1 is provided at the other end of the blade 1 as the vibrating body fixed to the tip of the horn 2.
And a vibrator 4. That is, as shown in FIGS. 3 and 4, the horn 2 and the vibrator 4 have the same configuration.

A vibrator 4 for absorbing vibration energy
A resistor R and a coil L are connected to the electrode 4a. The traveling wave due to the flexural vibration propagated to the blade body 1 as a vibrating body is converted into a horn 2 for absorbing vibration energy.
Then, the vibration energy is converted into electric energy by the vibrator 4, and a voltage is generated at the electrode 4 a of the vibrator 4.

The voltage generated at the electrode 4a of the vibrator 4 is consumed by the resistor R and the coil L described above. The resistance value of the resistor R is selected so that a complete traveling wave due to flexural vibration on the blade body 1 can be obtained.

A method of fixing the blade body 1 at the tip end of the horn 2 for absorbing vibration energy, the horn 2 for absorbing vibration energy, and the holder 6 of the vibrator 4
The method of fixing the holder 6 to the gantry 7 is the same as that described above.

In the ultrasonic cutter device having the above configuration, a sine wave voltage having a frequency of 20 KHz (kilohertz) is supplied from the ultrasonic oscillator 5 to the vibrator 4 and starts to vibrate. The vibration of the vibrator 4 is amplified by the horn 2 and transmitted to the blade 1 as the vibrating body.
A traveling wave is generated in the direction shown by the arrow S in FIG. 4 due to the flexural vibration (waveform of the two-dot chain line shown in FIG. 4) of the blade body 1 as the vibrating body shown in FIG. Then, when the blade body 1 of the ultrasonic cutter device is ultrasonically vibrated, a traveling wave due to flexural vibration is generated, and a soft confectionery or the like can be cut without being deformed.

[0014]

SUMMARY OF THE INVENTION An ultrasonic cutter device utilizing traveling waves due to flexural vibration generated in a blade as a vibrating body has a blade 1 as a vibrating body which has a reduced thickness. Since the length of 1 is long, chatter vibration of low frequency is caused to generate a growling sound. For example, 20
When a voltage having a frequency of KHz is applied and the vibration amplitude at the tip of the horn is vibrated at 35 μmp-p, the frequency of chatter vibration generated from the blade 1 is about 1 KHz to 2 KHz, and the sound pressure at this time is 80 db (decibel) or more.

Since the frequency of the chatter vibration is within the range of the audible sound, the growling sound due to the chatter vibration becomes a noise that is unbearable to humans. For this reason, the worker wears earplugs or the like in order to reduce chatter vibration noise generated from the blade body 1.

[0016] However, it is troublesome to work with earplugs, and there is a danger that the voice cannot be heard from other workers, which may hinder the work.

Accordingly, an object of the present invention is to provide an ultrasonic cutter device provided with a growl prevention mechanism capable of preventing generation of a growl noise due to chatter vibration from a blade as a vibrating body of the ultrasonic cutter device. And

[0018]

According to the present invention, there is provided an ultrasonic cutter provided with a growl-preventing mechanism, comprising: a vibrating body comprising a blade; an ultrasonic exciting means for exciting the vibrating body; and the other end of the vibrating body. And an energy converting means for consuming and absorbing vibration energy of the vibrating body, wherein the groan is disposed near the ultrasonic exciting means to prevent the vibrating body from humming. It has a prevention mechanism.

Further, the groan preventing mechanism of the ultrasonic cutter device provided with the groan preventing mechanism according to the present invention is such that a part of both side surfaces of the vibrating body comprising the blade is pressed with a soft urethane foam. .

Further, the groan preventing mechanism of the ultrasonic cutter device having the groan preventing mechanism according to the present invention has a pressing force adjusting means for adjusting a pressing force of the soft urethane foam to the vibrating body comprising the blade. Things.

Further, an ultrasonic cutter device provided with a growl-preventing mechanism according to the present invention includes a vibrating body composed of a blade body, an ultrasonic exciting means for exciting the vibrating body, and an ultrasonic exciting means positioned at the other end of the vibrating body. An energy conversion unit that consumes and absorbs vibration energy of the vibrating body, a growl prevention mechanism disposed near the ultrasonic excitation unit to prevent growl of the vibrating body, and a transfer device; The vibrating body made of a body performs a cutting process while performing a swinging operation in a vertical and oblique direction with respect to the object to be cut conveyed by the conveying device.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an ultrasonic cutter provided with a groan preventing mechanism according to the present invention. Parts having the same configuration and function as those of the conventional ultrasonic cutter device shown in FIGS. 3 and 4 will be described using the same reference numerals.

As shown in FIG. 1, the ultrasonic cutter device provided with a growl prevention mechanism according to the present invention includes a blade body 1 as a vibrating body having two blades having upper and lower blades. At both ends of the blade 1, elongated holes for attachment are formed.
The blade 1 serving as the vibrating body is inserted into long holes for mounting located at both ends of the blade 1 into screw portions formed at the tip of the horn 2 and fastened and fixed with nuts 9.

The horn 2 is also connected to the vibrator 4 on the side opposite to the tip end fixing the blade body 1. The vibrator 4
Is formed of a bolted Langevin type vibrator having a resonance frequency of 20 KHz.

The horn 2 and the vibrator 4 are fixedly supported on a holder 6 by a hexagon bolt 20 by a flange portion 2b formed on the horn 2. Further, the holder 6
Is erected on the gantry 7.

An ultrasonic oscillator 5 is connected to the electrode 4a of the vibrator 4, and the ultrasonic oscillator 5 excites the vibrator 4 to generate ultrasonic vibration. The horn 2
The vibration generated by the vibrator 4 is mechanically amplified to generate flexural vibration in the blade 1 as the vibrator.

The horn 2, the vibrator 4, and the
The ultrasonic oscillator 5 and related peripheral members are collectively referred to as ultrasonic excitation means.

A horn 2 for absorbing the vibration energy of the wave propagated by the blade 1 is provided at the other longitudinal end of the blade 1 as the vibrator fixed to the tip of the horn 2. A vibrator 4 is provided.

A vibrator 4 for absorbing vibration energy
A resistor R and a coil L are connected to the electrode 4a. The traveling wave due to the flexural vibration propagated to the blade body 1 as a vibrating body is converted into a horn 2 for absorbing vibration energy.
The vibrator 4 converts the vibration energy into electric energy to generate a voltage at the electrode 4 a of the vibrator 4. The voltage generated at the electrode 4a of the vibrator 4 is consumed by the resistor R and the coil L described above. The resistance R
Are selected so that a complete traveling wave due to the flexural vibration on the blade body 1 can be obtained.

The method of fixing the blade 1 at the tip of the horn 2 for absorbing vibration energy, the horn 2 for absorbing vibration energy and the holder 6 of the vibrator 4
The method of fixing the holder 6 to the gantry 7 is the same as that described above.

The horn 2 and the vibrator 4 for absorbing the vibration energy of the wave propagated by the blade 1, the resistor R and the coil L connected to the vibrator 4, and the related peripheral members , Energy conversion means.

The above description relates to a portion having the same configuration and function as the conventional ultrasonic cutter device.

Thus, the ultrasonic cutter device according to the present invention is provided with a growl prevention mechanism on the blade 1 as the vibrator in the vicinity of the horn 2 of the ultrasonic excitation means.

The humming prevention mechanism includes a sponge 10 that contacts a part of both sides of the blade body 1 and presses a part of both sides of the blade body 1, and is fixed on the gantry 7 with a substantially L-shaped side surface. A support portion 11 having a groove 11a for fixing the sponge 10 at the tip thereof, and adjusting a pressing force to a part of both side surfaces of the blade body 1 of the sponge 10 at the tip of the support portion 11 And a pressing force adjusting unit 12 as a pressing force adjusting means.

The pressing force adjusting section 12 is provided with the supporting section 11
The blade 1 is inserted and arranged in the groove 11a of the sponge 10, one side of the sponge 10 is disposed in contact with one side of the blade 1, and the other side of the sponge 10 is disposed on the other side of the sponge 10. A screw 21 inserted from substantially the center of the front surface 11b of the support portion 11 is attached and fixed. Therefore, by changing the rotation angle of the screw 21, the sponge 10 is
The pressing force on the blade body 1 can be varied by sliding in the area a.

As a material of the sponge 10, a soft urethane foam is used.

An experiment was conducted to confirm the effectiveness of each member using metal, rubber, plastic, vinyl tape, or the like as a member replacing the sponge 10.

However, in the case of metal and rubber, the blade 1 is heated to 150 ° C. or more by friction due to vibration, and the blade 1 is heated.
May be damaged or burned.

Also, when plastic or vinyl tape is used, frictional heat is generated due to vibration of the blade 1, and the plastic or vinyl tape is melted or dropped off due to the frictional heat. did.

However, it was confirmed that the use of the sponge 10 made of soft urethane foam did not generate heat from the blade body 1 and the sponge 10, and that the sponge 10 could be used for a long time.

A 20 KHz sine wave voltage is applied to the vibrator 4 from the ultrasonic oscillator 5 by the ultrasonic cutter device having the above-described structure to vibrate the blade 1 as a vibrator.
After confirming the generation of growling noise due to chatter vibration,
There was no groaning sound due to chatter vibration.

In the ultrasonic cutter device according to the present invention, since the blade 1 as a vibrator has a growl prevention mechanism, it is possible to suppress the generation of growl noise due to chatter vibration. That is, the vibration waveform of the blade body 1 of the ultrasonic cutter device not equipped with the groan prevention mechanism is obtained by overlapping the standing wave and the traveling wave of the flexural vibration, and the vibration waveform has nodes. Absent. This vibration waveform oscillates in a spurious mode, and the spurious mode vibration generates a growling sound due to low frequency chatter vibration.

However, the humming prevention mechanism of the ultrasonic cutter device, that is, a part of both side surfaces of the blade body 1 is pressed by a sponge 10 made of soft urethane foam, thereby reducing the bending vibration of the blade body 1. The acoustic impedance of the frequency increases, and the occurrence of vibration in the spurious mode, which is the cause of chatter vibration, can be suppressed.

By adding a growl prevention mechanism near the horn 2 of the ultrasonic excitation means, it is possible to suppress the occurrence of chatter vibration of the ultrasonic cutter device.

Next, an embodiment of an apparatus for automatically cutting confectionery, food and the like by mounting an ultrasonic cutter device provided with a growl prevention mechanism according to the present invention on a conveyor device such as a belt conveyor is shown in FIG. This will be described with reference to FIG.

As shown in FIG. 2, the ultrasonic cutter device for automatically cutting confectionery, food, and the like includes a belt conveyor 15 for conveying an object 18 such as confectionery, food, and the like.
An ultrasonic cutter device provided with a growl prevention mechanism provided so that the blade body 1 is positioned vertically and obliquely with respect to the belt conveyor 15, and an ultrasonic cutter device provided with the growl prevention mechanism is swung up and down diagonally. Oscillating drive unit 1 that performs oscillating operation
Consists of six.

The belt conveyor 15 has two belts 15a stretched between a pair of pulleys with a gap so that the belt 15a does not contact the blade body 1 of the ultrasonic cutter device. The blade body 1 of the ultrasonic cutter device installed obliquely in the vertical direction passes through a gap between two belts 15 a from the upper surface of the belt conveyor 15 and is located on the lower surface of the belt conveyor 15.

The oscillating drive unit 16 is a rack 1 having teeth formed on the lower surface of one end of the base 7 of the ultrasonic cutter device.
6a is engaged with a pinion 16b (small gear), a motor shaft (not shown) is connected to the pinion 16b, and the rotational motion of the motor (not shown) is changed to a linear motion. Accordingly, the ultrasonic cutter device swings vertically in a diagonal direction by periodically switching the rotation direction of a motor (not shown).

The operation of cutting an object 18 such as confectionery or food placed on a conveyor such as the belt conveyor 15 by an ultrasonic cutter device will be described below.

As shown in FIG. 2, the workpiece 18 is placed on the right side of the belt conveyor 15. After placing the object 18 on the belt conveyor 15, a sine wave voltage is applied from the ultrasonic oscillator 5 to the vibrator 4 to generate vibration in the blade 1. Further, the motor (not shown) of the swing drive unit 16
The rotation direction is periodically switched, and the rack 16a attached to the mount 7 of the ultrasonic cutter moves obliquely up and down depending on the rotation direction of the pinion 16b. At this time, the blade body 1 of the ultrasonic cutter also simultaneously performs an oblique swinging operation up and down.

Then, the workpiece 18 is moved by the belt conveyor 15 in the direction of arrow a shown in FIG. 2 and cut by the blade 1 of the ultrasonic cutter. While cutting the object 18, the blade body 1 of the ultrasonic cutter performs a swinging motion in an oblique vertical direction indicated by an arrow b shown in FIG. 2. After the cutting of the workpiece 18 is completed, the belt conveyor 15 is stopped.

The ultrasonic cutter device for cutting the blade body 1 while performing the oscillating motion is different from the ultrasonic cutter device for cutting the blade body 1 without performing the oscillating motion.
By performing the rocking motion, the sharpness of the cutting of the blade body 1 is increased, and a good cutting process can be performed without damaging the edge of the cut surface.

[0053]

As described above, by providing a growl prevention mechanism on the vibrating body in the vicinity of the ultrasonic excitation means of the ultrasonic cutter device, the generation of low frequency chatter vibration, which is a source of noise, is suppressed. it can. For this reason, the worker does not need to wear earplugs or the like, and is relieved from the hassle. Also,
The snarl prevention mechanism is a method of pressing both sides of the vibrating body with a soft urethane foam, so that the structure is simple and can be manufactured at low cost.

Further, since the mounting position of the growl prevention mechanism is near the ultrasonic excitation means, it is possible to have a cutting work area for the blade 1 similar to the conventional ultrasonic cutter device.

Further, by swinging the blade body 1 of the ultrasonic cutter obliquely up and down, it is possible to cut the confectionery or the like which is easily deformed without damaging the edges of the cut surface.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of an ultrasonic cutter device provided with a growl prevention mechanism according to the present invention, in which a part of the growl prevention mechanism is drawn out and enlarged.

FIG. 2 is an explanatory diagram of an ultrasonic cutter device that automatically cuts an object to be cut by a transfer device.

FIG. 3 is a diagram showing a configuration of a conventional ultrasonic cutter device.

FIG. 4 is a diagram showing a wave caused by flexural vibration by a two-dot line and a front view of a configuration of a conventional ultrasonic cutter device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade body 2 Horn 2b Flange part 4 Vibrator 4a Electrode 5 Ultrasonic oscillator 6 Holder 7 Flat plate 9 Screw 10 Sponge 11 Support part 12 Pressing force adjusting part 15 Belt conveyor 15a Belt 16 Swing drive part 16a Rack 16b Pinion 18 Cutting object

Claims (4)

[Claims] A vibrating body comprising a blade body; an ultrasonic exciting means for exciting the vibrating body; and an energy converting means located at the other end of the vibrating body for consuming and absorbing vibration energy of the vibrating body. An ultrasonic cutter device having a growl prevention mechanism, which is provided near the ultrasonic excitation means and has a growl prevention mechanism that prevents growl of the vibrating body. . 2. The groan-preventing mechanism according to claim 1, wherein the groan-preventing mechanism is formed by pressing a part of both side surfaces of the vibrating body made of the blade body with soft urethane foam. Sonic cutter device. 3. The method according to claim 1, wherein said growling prevention mechanism has a pressing force adjusting means for adjusting a pressing force of said soft urethane foam to a vibrating body comprising said blade body. An ultrasonic cutter device equipped with a growl prevention mechanism. 4. A vibrating body comprising a blade, an ultrasonic exciting means for exciting the vibrating body, and an energy converting means located at the other end of the vibrating body for consuming and absorbing the vibration energy of the vibrating body. A humming prevention mechanism arranged in the vicinity of the ultrasonic excitation means for preventing humming of the vibrating body, and a conveying device, wherein the vibrating body composed of the blade body is conveyed by the conveying device. An ultrasonic cutter device provided with a growl-preventing mechanism, which performs a cutting process while performing a swinging operation on a cut object in a vertical and oblique direction.