JPH07124899A - Ultrasonic cutter - Google Patents

Abstract

PURPOSE:To securely fix a flat blade even if there is same machining error in the fitting part of the blade, in a ultrasonic cutter device for setting the flat blade to the cutter device and fixing it with screws. CONSTITUTION:The fitting plane 2 of a flat blade 4 is formed in the horn 1 of a cutter device and a screw 5 having a recessed form at the front end is arranged opposite to the fitting plane 2. The flat blade 4 is placed on the fitting plane 2 and fastened with the screw 5. When setting the flat blade 4, the screw 5 is fastened to fix the flat blade 4 and further, the recessed front is deformed to fix the flat blade securely by fastening the screw 5. In this way, the supersonic vibration is securely transmitted and the cutting efficiency is increased.

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 in which a flat blade is set on a cutter device and fixed with screws.

[0002]

2. Description of the Related Art In a conventional ultrasonic type cutter device, a blade is replaced in a mounting hole provided in a horn according to a purpose of use. When fixing the blade to the horn of the cutter device, there is a handy type in which the blade is inserted into a hole or groove formed in the horn and fastened with a screw (JP-A-4-
(See Japanese Patent No. 317651).

As an example, an insertion hole 3 having a mounting plane 2 is formed in a horn 1 at the tip of the cutter device shown in FIG. 4, and a screw 5 for fixing a flat blade 4 is mounted on the mounting plane 2 of the insertion hole 3. It is arranged toward.

[0004]

By the way, when fixing the flat blade 4 to the horn 1 of the ultrasonic type cutter device with the screw 5,
The machining accuracy of the verticality of whether the fastening direction of the screw 5 is at right angles to the mounting plane 2 on which the flat blade 4 of the horn 1 is mounted, and the flatness of whether the mounting plane 2 is in close contact with the flat blade 4 are is important. If the machining accuracy is poor, the blade may be laterally deflected, the blade may be broken, and the horn 1 may generate abnormal heat. For example, if the flat surface of the flat blade has a waviness of 10 μm or more, the blade is likely to be laterally shaken. Machining of the mounting plane 2 of the flat blade 4 of the horn 1 is performed by electric discharge machining, end mill machining or the like, but it is very difficult with the present technology to machine the waviness to 10 μm or more.

As described above, the fixing means of the flat blade 4 is such that the flat blade 4 is brought into contact with the mounting plane 2 and tightened with the screw 5 from one side of the flat blade 4, so that the machining accuracy of the verticality and the flatness is important. Become. Due to the cost, the screw 5 to be used has a flat tip (see FIG. 6) and a round tip (see FIG. 5). However, in the case of the flat tip or round tip screw 5, the tip of the screw 5 often hits the flat blade 4 one-sided or point-contacting. There is.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ultrasonic cutter device which can securely fix a flat blade even if there is some processing error in the blade mounting portion of the cutter device.

[0007]

In order to achieve the above-mentioned object, the present invention forms a flat blade mounting plane on a horn of a cutter device, and mounts a screw whose tip shape is indented to the mounting plane. The flat blade is placed on the mounting plane and fastened with the screw.

[0008]

Since the present invention is configured as described above, the flat blade is fastened by tightening the screw. Further, by tightening the screw, the hollow tip is crushed and the flat blade is securely fixed. it can.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the horn 1 is provided with an insertion hole 3 having a mounting plane 2 so that a flat blade 4 can be placed thereon. Screw holes 10 facing the mounting plane 2
Is opened vertically and the recessed screw 5 is attached. The recessed screw 5 is formed by rounding the center of the tip and cutting the outer periphery of the tip of the screw. The tip of the screw is formed in an annular shape, and the thickness t in the radial direction thereof is reduced to facilitate collapse.

By using the screw 5 with the hollow tip,
Even if the above-described processing error occurs, the tip of the dent is slightly crushed by the axial force of the screw 5, and the screw 5 can be pressed against the blade surface without contacting with one side. This ensures transmission of ultrasonic vibrations and improves the cutting efficiency of the cutter device 8. Even if there is an error x in the height of the annular portion of the screw 5, the flat blade 4 can be securely fixed because the flat blade 4 is crushed by the axial force of the screw 5. Further, the material of the screw 5 is appropriately selected.

FIG. 3 shows an ultrasonic oscillator 7 and a cutter device 8
1 shows an ultrasonic cutter device 6 according to the present invention, to which is connected. The horn 1 is attached to the handle body 9 of the cutter device 8 so as to be capable of vibrating in the axial direction, and the flat blade 4 has the screw 5
Attached to the horn 1.

[0012]

EFFECT OF THE INVENTION Since the present invention is the ultrasonic type cutter device configured as described above, when the flat blade is fixed by the screw, the hollow tip is crushed and the flat blade is firmly adhered, so that the flat blade is securely fixed. can do. Therefore, the side deviation of the blade,
There is no risk of blade breakage, abnormal heat generation in the horn is eliminated, ultrasonic vibrations are reliably transmitted, and cutting efficiency is improved.

[Brief description of drawings]

FIG. 1 is a side sectional view of a horn portion at the tip of a cutter device according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a fastened state of a flat blade of the horn portion shown in FIG.

3 is an overall view of an ultrasonic cutter device using the horn shown in FIG.

FIG. 4 is a side view showing a horn portion of a conventional ultrasonic cutter device.

FIG. 5 is a front cross-sectional view showing a fastening state of a flat blade using a conventional round screw with a tip.

FIG. 6 is a side sectional view showing a fastening state of a flat blade using a conventional flat screw with a flat tip.

[Explanation of symbols]

 1 Horn 2 Mounting plane 4 Flat blade 5 Screw 8 Cutter device

Claims (1)

[Claims] 1. A flat surface for mounting a flat blade is formed on a horn of a cutter device, a screw having a tip end indented is arranged to face the mounting surface, and the flat blade is placed on the mounting surface for mounting the flat blade. An ultrasonic cutter device characterized by being fastened with screws.