JPH0526295U - Ultrasonic cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] In an ultrasonic cutter that cuts various sheet materials such as rubber sheets and plastic sheets, the blade tool can be freely attached to and detached from the horn tip of the oscillator, and it can be loosened and removed during use. Providing a means to firmly fix it so that it does not occur. A horn is provided with a holding member which is detachably fitted into a mounting hole formed in the tip surface of the horn, and the holding member is provided with a pair of elastic pieces for detachably sandwiching a plate-shaped cutting tool. A screw member that presses the elastic piece of the holding member is screwed on.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ultrasonic cutter used for cutting sheet materials such as rubber sheets, plastic sheets and cloth.

[0002]

[Prior Art]

 As shown in FIGS. 3A and 3B, as an ultrasonic cutter of this type, a slit c is formed in the tip surface of a horn b of an ultrasonic vibrator a including a Langevin type ultrasonic vibrator, and a plate is formed in the slit c. It is generally known that a blade-like tool d is inserted and at the same time one side of the tool d is held in pressure contact with the slit c by a set screw e screwed on the tip side of the horn.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional structure, the other surface of the cutting tool d contacts the set screw e at a point or a small area to form a gap between the slits c, so that the stability is poor and the cutting tool changes during cutting. It was easy to loosen and fall out.

[0004]

[Means for solving the problem]

 The present invention uses a cylindrical holding member having a pair of elastic pieces for holding a plate-shaped cutting tool, which is detachably fitted into a circular mounting hole formed in the tip surface of the horn and has a horn tip end side portion. The holding member is fixed to the mounting hole by a screw member screwed on the one end, and one of the elastic pieces is pressed to clamp the blade.

[0005]

[Action]

 The pair of elastic pieces of the holding member abut on both side surfaces of the plate-shaped cutting tool with a sufficient contact area, and since the elastic piece receives the pressing force of the screw member and clamps the cutting tool, the cutting tool is stably and reliably held. be able to.

[0006]

【Example】

 In FIG. 1A, FIG. 1B and FIG. 2, reference numeral 1 denotes an ultrasonic transducer such as a screw-tightened Langevin type transducer, and as is well known, a piezoelectric element 1a, a pair of metal blocks 1b and 1c sandwiching the piezoelectric element 1a, and a laminated body thereof. And a central bolt 1d that fastens them together. Reference numeral 2 is a horn in which one of the metal blocks of the ultrasonic oscillator 1 is connected to the metal block, here the block on the 1c side as the vibration radiation side.

A circular mounting hole 2a for mounting a cutting tool holding member, which will be described later, is formed in the tip surface of the horn 2 by drilling or the like, and the horn tip side portion is opened from the side portion to the mounting hole 2a. A screw hole 2b is formed. A cylindrical holding member 3 is formed so as to be removably fitted in the mounting hole 2a, and is made of an elastic metal material such as brass, stainless steel, or aluminum, and is located at a central portion reaching from one end surface to the other end surface. It has a pair of elastic pieces 3a and 3b formed by the vertical groove 3c. Reference numeral 4 denotes a plate-shaped cutting tool which is sandwiched between the opposing surfaces (vertical groove 3c) of the pair of elastic pieces 3a and 3b of the holding member, and the tip surface of which is a cutting blade 4a. Reference numeral 5 denotes a screw member screwed into the screw hole 2b of the horn, and the tip of the screw member abuts on one elastic piece of the holding member 3, here 3a, to fix the holding member 3 in the mounting hole 2a.

The outer surface of one elastic piece 3a of the holding member 3 is flattened, and the tip of the screw member 5 is brought into contact with the flat surface 3d to achieve positioning and rotation prevention of the holding member. You can

In the above structure, the plate-shaped cutting tool 4 is inserted into the vertical groove 3c formed between the pair of elastic pieces 3a and 3b of the holding member 3 such that the cutting edge 4a thereof protrudes forward, and this is inserted into the tip of the horn. When the threaded member 5 is screwed into the threaded hole 2b on the tip side of the horn after fitting into the mounting hole 2a of the surface, the tip of the threaded member abuts the flat surface 3d of the elastic piece 3a of the holding member and the holding member. 3 is fixed in the mounting hole 2a, and at the same time, the elastic piece 3a is elastically bent toward the elastic piece 3b toward the other side by the thrust of the screw member 5, so that the cutting tool 4 is firmly pinched.

In the ultrasonic cutter having the blade attached to the tip of the horn as described above, when an alternating voltage of a predetermined frequency (20 to 40 KHz) is applied to the piezoelectric element 1a of the ultrasonic vibrator 1, the piezoelectric element 1a and the metal The blocks 1b and 1c integrally resonate and generate an amplified vibration displacement at the front end of the horn 2. Since this vibration displacement propagates to the cutting tool 4 through the holding member 3, for example, when cutting a rubber sheet, the frictional resistance between the sheet and the cutting tool can be reduced, and the cutting can be performed easily and accurately with a light operating force.

[0011]

【effect】

 As described above, according to the present invention, since the plate-shaped cutting tool can be stably and securely attached to the horn tip portion by using the holding member, the fluctuation and looseness of the cutting tool that has been frequently generated during cutting in the past, It can be prevented from falling off. Further, according to the present invention, since the holding member is detachably attached to the mounting hole of the horn and the blade is detachably attached to the holding member, it is possible to easily replace the new blade due to abrasion of the blade. In addition, the pair of elastic pieces of the holding member facilitates the insertion of blades having different plate thicknesses due to its flexibility, so that one holding member can hold a plurality of blades having different plate thicknesses. Hold.

[Brief description of drawings]

FIG. 1A is a quarter sectional view of an ultrasonic cutter showing an embodiment of the present invention.

FIG. 1B is an enlarged view of a cross section taken along the line EE in FIG. 1A.

FIG. 2 is an exploded perspective view of the ultrasonic transducer shown in FIG.

FIG. 3 is a quadrant sectional view showing a conventional ultrasonic cutter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ultrasonic transducer 2 Horn 2a Mounting hole 3 Holding members 3a, 3b A pair of elastic pieces 4 Plate blade 5 Screw member

Claims (1)

[Scope of utility model registration request] 1. An ultrasonic transducer with a horn having a circular mounting hole formed in a front end surface thereof, and a cylindrical holding member having a pair of elastic pieces detachably fitted in the mounting hole of the horn. A plate-shaped cutting tool in which a cutting blade is sandwiched between a pair of elastic pieces of the holding member so as to protrude outward, and a holding member is fixed to a mounting hole by being screwed to a side portion of the horn tip and the elastic piece is pressed. An ultrasonic cutter comprising a screw member for pressing the cutting tool.