JP2003001592A - Knife holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knife holder which is free from a gradual sag or a heat generation in screw members due to high frequency oscillation. SOLUTION: A knife holder 1 has a structure in which: an end section 4 of a tip minor diameter section 3 of a metal horn section 2 connected to an ultrasound oscillation section in a sonication apparatus has a groove section 6 extending from the end section 4 to a base section 5 of the tip minor diameter section 3; the wall section of the outer circumference of the end section 4 of the tip minor diameter section 3 of the metal horn section 2 has a first spiral section 7; and a nut section 9 has at the inner surface side a second spiral section 8 engaging with the spiral section 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic processing blade device, and more particularly to a processing blade holder capable of securely holding exchangeable processing blades, files, grindstones, etc., without generating heat.

[0002]

2. Description of the Related Art Conventionally, it is well known to perform processing such as cutting, polishing, and grinding an object using an ultrasonic processing device, and in that case, a vibrator connected to the ultrasonic processing device is vibrated. Then, the processing blade or an appropriate processing tool connected to the vibrator is, for example, at a high frequency of 25 kHz to 40 kHz,
An appropriate object is processed while vibrating with an amplitude of 30 to 40 μ.

By the way, among the ultrasonic processing devices,
Ultrasonic cutters are currently used in a wide range of industrial fields because the ultrasonic cutters are subjected to high-frequency vibration under the conditions as described above, whereby processing blades, that is, processing blades and paper, leather, synthetic Since the cutting resistance at the contact part with the material to be cut such as resin, rubber, wood, etc. is greatly reduced by the effect of such vibration, it is possible to cut without having to strongly press the material to be cut. Even those that were thought to be difficult to cut with the processing blade can now be easily cut.

Further, a thick or thin material can be easily cut in a state of being overlaid in multiple layers. Further, by using such an ultrasonic cutter, since the cutting resistance between the material to be cut and the processing blade is small, the cut surface of the material to be cut is finished neatly, and the commercial value of the product is improved. It is also effectively used for surface finishing and surface finishing of leather, metal wood, synthetic resin, etc.

Further, in the case of the ordinary processing blade, when the material to be cut is cut, the processing blade cannot be cut after several cutting operations, and it is necessary to replace it with a new processing blade. Therefore, there was a problem that the manufacturing cost would be high, but by using such an ultrasonic cutter, even if the same processing blade is used for a long period of time, the cutting effect will not be affected so much, and use an ultrasonic cutter. By
The durability of the cutting effect is improved, and thus the life of the processing blade is extended, and as a result, the production cost is significantly improved.

[0006] Conventionally, when using such an ultrasonic cutter, various contrivances have been made in order to efficiently transmit the high frequency vibration of the ultrasonic cutter to the processing blade. In other words, when attaching the processing blade to the ultrasonic processing apparatus main body, a normal processing blade holder is used, the processing blade is fixed and attached to the processing blade holder, and then the processing blade holder is attached to the ultrasonic processing apparatus main body. It is fixed to a horn portion connected to a high-frequency piezoelectric element provided. Therefore, it is necessary that the processing blade and the processing blade holder are tightly and integrally fixed to each other.

A high-frequency piezoelectric element mainly made of ceramics and a high-frequency generating means connected to the high-frequency piezoelectric element are provided in the ultrasonic processing apparatus main body.

FIG. 6 shows a conventional embodiment, in which the end of the processing blade 10 opposite to the processing blade edge 31 is flattened.
In addition to the above, the flat portion 30 is provided with a cutout portion 34, and the flat portion 30 includes the processing blade holder 35 at the tip portion of the processing blade holder 35 and including the central axis of the processing blade holder 35. The processing blade 10 is fitted into the groove portion 33 extending in the diametrical direction and the longitudinal direction of the processing blade holder 35, and the screw 32 is fitted into the cutout portion 34, so that the processing blade 10 has an inner wall surface of the groove portion. It is gripped between the wall surfaces that are opposed to each other and that constitute the. Further, in the conventional processing blade, since the processing blade is fixed with one screw, when a force in the groove direction is applied to the processing blade, a shearing force is applied to the processing blade, so that there is a drawback that the processing blade tilts. did.

Further, conventionally, the processing blade holder 35 is connected to the high-frequency generating means in the ultrasonic processing apparatus main body, and the threaded portion 36 is provided at the end of the tip small diameter portion 3 of the metal horn portion 2.
It is fixed by screwing through. However,
In such a structure, since the diameter of the screw portion 36 is small, this portion is often damaged, which has been a practical problem.

[0010]

However, the conventional processing blade holder has a drawback in that even if the processing blade holder is fixed by the screw 32, slack is gradually generated due to high frequency vibration. In addition, this slack also caused fever.

Further, in recent years, the size of the processing blade has been considerably reduced, and such a small processing blade can be accurately attached to the processing blade holder and surely prevented from being loosened by high frequency vibration. Fixing is becoming a difficult task.

In addition, in the conventional processing blade holder, since it is formed separately from the metal horn portion, heat is generated or damage occurs at the portion where the processing blade holder and the metal horn portion are joined. When the connecting portion is reinforced by using a member having an outer diameter larger than the outer diameter portion of the metal horn portion, since the frequency is different, the tip of the processing blade holder is Since accurate ultrasonic waves are not transmitted, it is impossible to achieve a sufficient effect in cutting operation.

Therefore, an object of the present invention is to provide a processing blade holder in which the processing blade is not loosened by high frequency vibration, and at the same time, accurate ultrasonic vibration that is strong and does not generate heat reaches the tip of the processing blade. It is to provide a processing blade holder capable of doing things.

[0014]

In order to solve the above-mentioned problems, the present invention basically adopts the structure as described below. That is, the aspect according to the present invention is a processing blade holder used for ultrasonic processing, wherein the end portion of the tip small diameter portion of the metal horn portion connected to the ultrasonic oscillator in the ultrasonic processing apparatus is from the end portion. A groove portion is formed toward the base of the tip small diameter portion, and a first screw portion is formed on the outer peripheral wall portion of the end of the tip small diameter portion of the metal horn portion.
And a processing blade configured to have a second screw portion that fits in the screw groove portion and a nut portion that is formed on the inner surface side, and that fixes the processing blade inserted in the groove portion into the groove portion by the nut portion. It is a holder.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Since the processing blade holder of the present invention adopts the above-mentioned technical structure, it is easy to manufacture, and at the same time, the operation of attaching the processing blade to the processing blade holder is extremely simple. The processing blade is certainly and firmly held in the groove portion of the processing blade holder, so that there is no fear that the processing blade will be loosened or tilted during the ultrasonic processing operation.

Further, the processing blade holder according to the present invention is formed directly and integrally with the metal horn part, has no joint part with the metal horn part or a small diameter fitting part, and has a nut part. Since the outer diameter of the metal horn is not larger than the outer diameter of the small tip of the metal horn, the transmitted ultrasonic vibrations are not modulated, so there is little failure or destruction, and accurate ultrasonic processing is possible. A viable processing blade holder is provided.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a specific example of the processing blade holder according to the present invention will be described below in detail with reference to the drawings.

That is, FIG. 1 and FIG. 2 are views showing the structure of a specific example of a processing blade holder according to an embodiment of the present invention, in which the processing blade holder 1 used for ultrasonic processing is shown.
In addition, a groove portion 6 extending from the end portion 4 to the base portion 5 of the tip small diameter portion 3 is provided at the end portion 4 of the tip small diameter portion 3 of the metal horn portion 2 connected to the ultrasonic wave oscillating portion in the ultrasonic processing apparatus. Along with the formation, the first screw portion 7 is formed on the outer peripheral wall portion of the end portion 4 of the tip small diameter portion 3 of the metal horn portion 2, and the second screw portion 8 fitted to the screw portion 7 is formed on the inner surface. The processing blade holder 1 is characterized by comprising a nut portion 9 formed on the side, and the processing blade 10 inserted in the groove portion 6 is tightened and fixed in the groove portion 6 by the nut portion 9. ing.

That is, the processing blade holder 1 according to the present invention is, as shown in FIG. 3, directly in the vicinity of the end portion of the tip small diameter portion 3 of the metal horn portion 2 used in the ultrasonic processing apparatus 100. In addition, it is formed by a so-called build-in structure that is integrally formed. Therefore, it is possible to almost completely eliminate the above-mentioned problems of the prior art.

The processing blade holder 1 according to the present invention is
As shown in FIG. 3, the metal horn unit 2 is directly connected to the ultrasonic processing unit 200 used in the ultrasonic processing apparatus 100.
Is directly connected and fixed to the ultrasonic processing unit 200 including the high frequency generating means.

For the generation of ultrasonic vibration, Jurcon. A Langevin type vibrator having a structure in which a piezoelectric vibrator using a piezoelectric effect such as lead titanate is sandwiched between metal blocks is used. In the high-frequency piezoelectric element, the vibrator expands and contracts in the longitudinal direction at the resonance frequency by supplying a high-frequency voltage having the same frequency as the longitudinal resonance frequency determined by the sound velocity and the length of the material via the electrode. Further, a high-amplitude ultrasonic vibration is obtained by utilizing the amplitude expansion phenomenon of the metal horn in which the amplitude of the end face on the thin side is larger than the amplitude on the thick side.

The groove 6 in the present invention is the processing blade 1
The processing blade holding unit 11 that holds 0 is configured.
To describe the structure of the groove portion 6 in the present invention in more detail, the interval between the surfaces of the groove portion 6 facing each other is set to be substantially equal to the thickness of the processing blade 10. Is desirable.

Among the groove portions 6, as shown in FIG. 4, a groove portion 6'formed inside the processing blade holder 1 is set so as to be approximately equal to the thickness of the processing blade 10. However, the groove portions 6 ″ provided on both sides of the groove are
It is preferable that the groove 6'be configured to be narrower than the interval between the grooves.

The groove 6 in the present invention is shown in FIG.
As shown in FIG. 4 and the like, it is formed over a predetermined length H in the vertical direction from the tip portion 4 of the processing blade holder 1. Also, the groove 6
A through hole 12 having a substantially cylindrical shape is formed at the rear end of the first wall portion 20 and the second wall portion formed at the tip of the processing blade holder 1 divided into two by the groove portion 6. 21 is easily deformed.

That is, in the present invention, the end portion of the groove portion 6 facing the base portion 5 is connected to the groove portion 6 and the tip small diameter portion of the metal horn portion 2 in the width direction of the groove portion 6. A through hole portion 12 formed by penetrating 3 is provided. Further, the gap of the groove portion 6'is set to a gap having a length substantially equal to or equal to the thickness of the processing blade 10 that is fixedly held, and constitutes an enlarged groove portion 6 ', and the gap is, for example, 0.5 mm. Is.

On the other hand, the gap between the groove portions 6 "provided on both sides of the enlarged groove portion 6'is set to be shorter than the gap between the enlarged groove portions 6 '. In this embodiment, for example, It is 0.4 mm to 0.2 mm.

The enlarged groove portion 6'in the present invention is extended to at least a part of the inner wall surfaces of the pair of opposing wall portions 21 and 22. That is, on the inner wall surfaces 13a and 13b of the groove portion 6 facing each other, the enlarged groove portion 6'having substantially the same thickness and height as the processing blade 10 is formed. The enlarged groove portion 16 is formed to have a width equal to that of both of the facing inner wall surfaces 13a and 13b, for example, 0.5 mm to 1.5 mm. Further, the enlarged groove portion 6 ′ is formed along the groove portion 6 with a predetermined length.

Further, the processing blade holder 1 according to the present invention.
End part 4 of the tip small diameter part 3 of the metal horn part 2 constituting the
It is desirable that the taper portion 14 is provided on the. In the present invention, it is also preferable that the inner surface of the nut portion 9 is provided with a tapered portion abutting portion 15 that abuts the tapered portion 14. The tapered portion abutting portion 15 in the present invention is not particularly limited, but it is preferable that the tapered portion abutting portion 15 has a structure so as to be in continuous contact with the tapered portion 14.

The tapered portion abutting portion 15 according to the present invention
May be constituted by a cylindrical protrusion 16 formed inside the nut portion 9 as shown in FIG. 5 (A), or as shown in FIG. 5 (B). Similarly, it may be constituted by the annular ring 17 held in an appropriate groove or fitting portion inside the nut portion 9.

In the present invention, when the nut portion 9 is engaged with the screw portion 7 provided on the tip small diameter portion 3 of the metal horn portion 2 constituting the processing blade holder portion 1 and swung, In contact with the tapered portion 14, the groove portion 6
Is configured to apply a biasing force in the direction of reducing the gap and in the direction of the base 5 of the metal horn 2 along the central axis of the processing blade holder 1.

As a result, when the nut portion 9 is screwed in, the abutting portion of the nut portion comes into contact with the taper portion and the gap between the groove portions is reduced, so that the processing blade 1
0 is securely and firmly fixed and held in the groove portion 6. Furthermore, the biasing force does not loosen the screwed state between the screw portion 8 of the nut portion 9 and the screw portion 7 provided with the tip portion 4 of the metal horn portion 2, and the holding force of the processing blade 10 is increased. There is no worry about it dropping.

In the processing blade holder 1 according to the present invention, the outer diameter of the nut portion 9 screw-fitted into the screw portion 7 provided in the vicinity of the tip portion 4 of the tip small diameter portion 3 is: It is desirable that the outer diameter dimension is set so as not to be larger than the outer diameter dimension of the screw portion 7 formed on the processing blade holder 1 by 4 mm or more.

That is, in the present invention, when the processing blade holder 1 is used, the tip small diameter part of the metal horn part 2 is so arranged that the ultrasonic oscillation frequency from the ultrasonic processing device is not changed or modulated. It is desirable that the member attached to No. 3 has a dimension substantially the same as the outer diameter dimension of the tip small diameter portion, but this is not possible in practice, so in the present invention, the nut portion 9 is used. This problem can be solved by setting the outer diameter of the outer diameter of the tip small diameter portion 3 so as not to be larger than the outer diameter of 4 mm or more.

In the present invention, the metal material forming the metal horn portion 2 and the metal material forming the nut portion 9 are preferably the same. Further, in the present invention, it is also preferable that the spanner fitting portion 25 is provided in the vicinity of the processing blade holder 1 in the tip small diameter portion 3 of the metal horn portion 2.

In the present invention, the processing blades can be replaced, but this is because the processing blades that are heavily worn are easily replaced. Further, the processing blade holder can be exchanged because various materials to be cut are used, and since there are many types such as blades and blade thickness, it is more convenient to exchange only the tip of the vibrator. Furthermore, the processing blade has a high hardness and must transmit vibrations to it, and must withstand the force required for cutting, so the holder side is also easy to damage and is a semi-consumable product. Because there is.
The present invention is not limited to the above embodiments, and various design changes can be made based on the technical idea of the present invention.

[0036]

Since the present invention adopts the technical constitution as described above, it is easy to manufacture, and at the same time, the operation of attaching the processing blade to the processing blade holder is extremely easy, and the processing is proper. Since the blade is securely and firmly held in the groove portion of the processing blade holder, there is no fear that the processing blade will be loosened or tilted during the ultrasonic processing operation.

In addition, the processing blade holder according to the present invention is formed directly and integrally with the metal horn part, has no joint part with the metal horn part or a small diameter fitting part, and has a nut part. Since the outer diameter of the metal horn is not larger than the outer diameter of the small tip of the metal horn, the transmitted ultrasonic vibrations are not modulated, so there is little failure or destruction, and accurate ultrasonic processing is possible. A viable processing blade holder is obtained.

Further, in the present invention, the operation of screwing the nut portion into the gap of the groove portion having a pair of opposed inner wall surfaces for inserting and sandwiching the processing blade in a part of the main body holding the processing blade. Accordingly, the processing blade holder is configured so that the interval between the groove portions can be adjusted, and in the processing blade holder, an enlarged groove portion that is substantially equal to the processing blade is formed on the inner wall surface facing the groove portion, so that the attached processing blade vibrates. Noise can be prevented without sagging. Further, it is possible to prevent heat generation and loss due to friction.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a processing blade holder of the present invention.

FIG. 2 is a diagram showing a configuration of an embodiment of a processing blade holder of the present invention.

FIG. 3 is a diagram showing a state in which the processing blade holder of the present invention is connected to an ultrasonic processing apparatus.

FIG. 4 is a diagram illustrating a detailed configuration of a specific example of the processing blade holder of the present invention.

FIG. 5 is a diagram showing a specific example of a configuration of a nut portion in the processing blade holder of the present invention.

FIG. 6 is a perspective view showing an example of a configuration of a conventional processing blade holder.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Processing blade holder 2 Metal horn part 3 Small tip part 4 End part of small tip part 5 Base part of small tip part 6 Groove part 6'Expansion groove part 6 "Groove parts on both sides of expansion groove part 7 First screw part 8 Second screw Part 9 Nut part 10 Processing blade 100 Ultrasonic processing device 200 Ultrasonic processing part 11 Processing blade holding part 12 Through hole part 20 First wall part 21 Second wall part 13a, 13b On opposing inner wall surfaces 13a, 13b of groove part Is formed with an enlarged groove portion 6'having substantially the same thickness and height as the processing blade 14 Tapered portion 15 Tapered portion abutting portion 16 Projection portion 17 Annular ring 25 Spanner fitting portion

Claims (13)

[Claims] 1. A processing blade holder used for ultrasonic treatment, comprising: a metal horn portion, which is connected to an ultrasonic wave oscillating unit in an ultrasonic treatment apparatus, at an end portion of a tip small diameter portion from the end portion to the tip small diameter portion. While forming a groove toward the base of the part,
The outer peripheral wall at the end of the small diameter tip of the metal horn has a first
And a nut portion that forms a second screw portion that fits into the screw portion on the inner surface side, and the processing blade inserted into the groove portion is formed by the nut portion. Processing blade holder characterized by being tightened and fixed inside. 2. The processing blade holder according to claim 1, wherein the groove portion constitutes the processing blade holding portion. 3. The processing blade holder according to claim 1, wherein an interval between the groove portions is set to be substantially equal to a thickness of the processing blade. 4. The processing blade holder according to claim 1, wherein groove portions are formed on both sides of the groove portion at intervals shorter than the thickness of the processing blade. . 5. A through-hole portion, which is connected to the groove portion and is formed to penetrate the tip small diameter portion of the metal horn portion in the width direction of the groove portion, is provided at a terminal end portion of the groove portion facing the base portion. The processing blade holder according to claim 1, wherein the processing blade holder is provided. 6. The processing blade holder according to claim 1, wherein a taper portion is provided at an end portion of a tip small diameter portion of the metal horn portion constituting the processing blade holder. . 7. The processing blade holder according to claim 1, wherein an inner surface of the nut portion is provided with a tapered portion abutting portion that abuts the tapered portion. 8. The taper portion abutting portion, when the nut portion is engaged with a screw portion provided on a tip small diameter portion of the metal horn portion forming the processing blade holder portion and swung, the taper portion is formed. The processing blade holder according to claim 7, wherein the processing blade holder is configured to apply a biasing force in a direction of contacting the groove portion and reducing the gap of the groove portion. 9. The processing blade holder according to claim 7, wherein the tapered portion abutting portion is a protruding portion formed inside the nut portion. 10. The process according to claim 7, wherein the tapered portion abutting portion is formed of an annular ring formed inside the nut portion and appropriately held in the groove portion. Blade holder. 11. The outer diameter dimension of the nut portion is set so as not to be larger than the outer diameter dimension of the screw portion formed on the processing blade holder by 4 mm or more. The processing blade holder according to any one of 10. 12. The processing blade holder according to claim 1, wherein the metal material forming the metal horn portion and the metal material forming the nut portion are the same. 13. The processing blade holder according to claim 1, wherein a spanner fitting portion is provided in the vicinity of the processing blade holder of the metal horn portion.