JPS6331937Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention uses a processing horn that applies ultrasonic vibrations and a rotatable presser roller that is arranged so as to be able to come into contact with and separate from the processing surface of this processing horn. This invention relates to an ultrasonic welding machine that performs welding while moving in different directions.

This kind of conventional ultrasonic welding machine has a processing horn installed at the lower part of a table attached to the machine frame so that the processing surface at the upper end is approximately on the same plane as the top surface of the table. A presser roller rotatable around one axis substantially parallel to the machining surface of the machining horn is disposed so as to be able to come into contact with and separate from the machining surface, and a thermoplastic material is used between the machining surface of the machining horn and the presser roller. It is common to have a configuration in which a sheet-shaped material to be processed made of resin is held and transferred in one direction while being heated and welded by ultrasonic vibration of the processing surface. According to such a conventional structure, there is no problem when welding sheet-like workpiece materials flat, but for example, when welding sheet-like workpiece materials together in a flat manner, welding is not a problem when welding sheet-like workpiece materials together. When welding a sealing tape to a cylindrical workpiece material along the sewn portion thereof, there is a problem in that the presser roller gets in the way of transporting the cylindrical workpiece material, making welding difficult.

The present invention was developed in view of the above circumstances, and its purpose is to provide an ultrasonic welding machine suitable for welding cylindrical workpieces.

An embodiment of the present invention will be described below with reference to the drawings.

1 is a machine frame; 2 is a table attached to this machine frame 1 and forming a part of the machine frame 1; a hollow arm 3 is erected on this table 2; A head 4 is attached to the tip of the arm 3, and a drive motor 5 with a speed reducer serving as a drive means is attached to the side surface of the head 4 opposite to the arm 3. Reference numeral 6 denotes a slide rod that is supported by the head 4 so as to be movable up and down, and a roller support 7 is attached to the lower end of the slide rod.A presser roller 8 is supported on the roller support 7 by a shaft 9. Thus, the presser roller 8 is rotatable around an axis 9, which is an axis substantially parallel to the upper surface of the table 2, which is a horizontal surface. The presser roller 8 is moved in one direction by the belt 10 by the drive motor 5 equipped with a speed reducer.
The slide rod 6 is rotated in the direction, and a downward spring force is applied to the slide rod 6 by a spring member (not shown) disposed inside the head 4. Reference numeral 11 denotes a machining horn, which has a stepped, approximately cylindrical shape and includes a large-diameter portion 12, and protruding portions 13 and connecting portions 14 located above and below the horn and having a smaller diameter than the large-diameter portion 12. A flat processed surface 15 is formed on the upper part of the protrusion 13 which is the protrusion tip. The connecting portion 14 of the processing horn 11 passes through an insertion hole 2a formed in the table 2 facing the presser roller 8 and projects downward, and its lower end is connected to the ultrasonic vibrator 16. The processing horn 1
1 is arranged so that the large diameter portion 12 and the protruding portion 13 protrude above the upper surface of the table 2, and the processing surface 15 is substantially parallel to the upper surface of the table 2, and the presser roller 8 is mounted on the processing surface 15. We're starting to come into contact. The ultrasonic vibrator 16 is elastically supported by a support frame (not shown) fixed to the lower part of the machine frame 1, and is adapted to receive an oscillation output from a high-frequency oscillator (not shown). Reference numeral 17 denotes a presser foot lifting lever rotatably mounted on the lower part of the head 4, and when a foot pedal (not shown) provided at the lower part of the machine frame 1 is depressed, the presser foot lifting lever 17 lifts up the presser foot by lifting a presser foot lever (not shown). , is rotated in the direction of arrow B via the link 18 and the connecting rod 19 to raise the slide rod 6, thereby separating the presser roller 8 from the machining surface 15 of the machining horn 11 by a predetermined distance. There is. When the aforementioned foot pedal is released, the pressing force of the presser foot lifting lever 17 against the slide rod 6 is released, and the slide rod 6 is lowered by the spring force of the spring member in the head 4, and the presser foot is lowered by the spring force of the spring member in the head 4. roller 8
comes into contact with the machining surface 15 of the machining horn 11 again. Reference numeral 20 denotes an auxiliary table, which has a rectangular box shape with an open bottom and one side, and has outwardly directed flanges 20a, 20a formed on two corresponding sides of the open bottom. The upper plate has an insertion hole 20 having a diameter slightly larger than the outer diameter of the protrusion 13 of the processing horn 11.
b is formed. Furthermore, this auxiliary table 20
The height dimension of the table 2 of the processing horn 11 is
It is set to be approximately equal to the protrusion dimension that protrudes from the upper surface of.

Next, the operation of this embodiment will be explained.

First, the case of welding cylindrical workpiece materials will be described. Reference numeral 21 denotes a sleeve of a raincoat, which is a cylindrical material to be processed, and is formed by polymerizing both ends of a sheet made of thermoplastic resin and sewing the polymerized portion with a sewing machine. Then, a sealing tape 22 made of thermoplastic resin is welded to the sleeve 21 along the sewn portion 21a. Tape 22 supplied
abut against the sewing part 21a of the sleeve 21 from the outside,
After that, press roller 8 to press one opening of sleeve 21.
is raised and fitted into the protrusion 13 of the machining horn 11 (see FIG. 5). in this case,
Sewing portion 2 on one opening side of the sleeve 21
The end of tape 1a and the end of tape 22 are placed on the processing surface 15, and the presser roller 8 is lowered to press against the processing surface 15. After that, the oscillation output from a high frequency oscillator (not shown) is transmitted to the ultrasonic transducer 1.
6 and rotates the drive motor 5, the processing surface 15 of the processing horn 11 vibrates ultrasonically, and the sewing portion 21a and the portion of the tape 22 held between the processing surface 15 and the presser roller 8 are heated. At the same time as welding, the presser roller 8 rotates in the direction of arrow A to move the sleeve 21 and tape 22 in one direction, arrow C.
Therefore, the sleeve 21 is continuously welded to the tape 22, and the welded portions are sequentially fitted into the protrusion 13 of the processing horn 11 and wrapped around it. Thus, when such welding work is completed, the sleeves 21 are all fitted around the processing horn 11.

Furthermore, the case of welding sheet-like workpiece materials will be described. In this case, after raising the presser roller 8, the auxiliary table 20 is moved over the table 2 from the opening on one side so as to enclose the machining horn 11, and the insertion hole 20b of the top plate is opened for machining. When facing the processed surface 15 of the horn 11, it is lowered and placed on the table 2, and the flange portion 20 of the horn 11 is lowered and placed on the table 2.
a, 20a are attached to the table 2 by screws (not shown).
removably attached to the As a result, the protrusion 13 of the machining horn 11 is inserted into the insertion hole 20b of the auxiliary table 20, and the machining surface 15 becomes substantially flush with the upper surface of the auxiliary table 20, so that normal ultrasonic It has a configuration similar to that of a welding machine, and can easily weld two-dimensional sheet-like workpiece materials.

According to this embodiment, the following effects can be obtained. That is, since the substantially cylindrical processing horn 11 is arranged so as to protrude upward from the table 2, which is a part of the machine frame 1, the sewing part 21a of the sleeve 21, which is the cylindrical workpiece material, is sealed. When welding the tape 22 for
The welding work can be performed by wrapping around the protrusion 13 of the processing horn 11,
Unlike in the past, the presser roller 8 does not get in the way when transferring the sleeve 21, and therefore,
Tape 22 for sealing the sewing part 21a of the sleeve 21
can be welded quickly and reliably. In addition, the sleeve 21 is given a transfer force by the rotation of the presser roller 8, and the processing surface 15 vibrates, so that the sleeve 21 is smoothly fitted into the processing horn 11, improving welding workability. It will be excellent.
Furthermore, an auxiliary table 20 is prepared, and when this auxiliary table 20 is mounted on the table 2, the protrusion 13 of the machining horn 11 is inserted into the insertion hole 20b of the auxiliary table 20, and the machining surface 15 is Since the upper surface of the auxiliary table 20 is substantially flush with the upper surface of the auxiliary table 20, ordinary welding operations for welding sheet-like workpiece materials in a plane can be easily performed, which is extremely convenient in practice.

In the above embodiment, a case has been described in which the sealing tape 22 is welded to the sewn portion 21a of the sleeve 21. It is also possible to manufacture a cylindrical workpiece by directly welding the parts.

Further, in the above embodiment, the machining horn 11 is formed into a stepped substantially cylindrical shape, but is not limited to this, and may be formed into a prismatic shape, for example.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can of course be implemented with appropriate modifications within the scope of the gist.

As explained above, the present invention has a structure in which a machining horn is provided on the machine frame so as to protrude from the machine frame in a columnar manner, and a machining surface is formed at the tip of the protrusion to be brought into contact and separated by a rotatable presser roller. Therefore, the cylindrical workpiece welded by ultrasonic vibration can be transferred so as to wrap around the processing horn, and the welding work of the cylindrical workpiece can be performed quickly and reliably. This has the practical effect of making it possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially sectional front view, FIG. 2 is a partially sectional side view, FIG. 3 is a perspective view of the auxiliary table, and FIG. 4 is a partially sectional front view. 5 is a perspective view of a protruding part of a processing horn for explaining the operation, and FIG. 6 is a partial front view in a longitudinal section showing a working state different from that shown in FIG. 1. be. In the drawing, 1 is a machine frame, 2 is a table (part of the machine frame), 3 is an arm, 4 is a head, 5 is a drive motor (drive means), 6 is a slide rod, 8 is a presser roller,
11 is a processing horn, 13 is a protrusion, 15 is a processing surface, 16 is an ultrasonic vibrator, 17 is a presser foot lifting lever, 20 is an auxiliary table, 21 is a sleeve (cylindrical workpiece material), and 22 is a tape. .

Claims (1)

[Claims for Utility Model Registration] 1. A machine frame, a machining horn provided on the machine frame and having a machining surface to which ultrasonic vibrations are applied, and a machining horn capable of coming into contact with and separating from the machining surface of the machining horn. The presser roller is arranged to be rotatable around one axis substantially parallel to the processing surface, and a drive means for rotationally driving the presser roller in one direction. In an ultrasonic welding machine that continuously welds workpiece materials by ultrasonic vibration while transferring the processing horn to the machine frame, the processing horn is provided in a columnar shape protruding from the machine frame, and a processing surface is formed at the tip of the protrusion. Ultrasonic welding machine featuring: 2. According to claim 1 of the utility model registration claim, the machine frame is provided with an auxiliary table that can be attached to the machine frame to support the workpiece material in substantially the same plane as the machining surface of the machining horn. Ultrasonic welding machine described. 3. The ultrasonic welding machine according to claim 1 or 2, wherein the processing horn has a substantially cylindrical shape.