JPS6210096Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses a circular or annular machining surface of a machining horn to which ultrasonic vibrations are applied, and a presser roller placed at a position offset from the center of the machining surface to form a sheet. Regarding a bottom plate used in an ultrasonic processing machine that continuously welds the workpiece by holding the workpiece and rotating the presser roller and the processing horn, it is particularly provided at the contact portion between the presser roller and the processing surface. A scoop that has a guide hole whose longitudinal direction is the feeding direction of the workpiece, and that scoops up the workpiece at the tip of the contact portion between the presser roller and the processing surface in the feeding direction of the workpiece. The present invention relates to a bottom plate for an ultrasonic processing machine which has a structure having a section to improve straightness of a workpiece and realize smooth feeding.

Conventionally, in this type of ultrasonic machining machine, a sheet-like workpiece is sandwiched between a circular or annularly formed machining surface of a machining horn and a presser roller placed oppositely at a position offset from the center of the machining surface. In an ultrasonic processing machine that rotates not only the presser roller but also the machining horn for feeding the workpiece, the feed of the workpiece becomes better, but the workpiece constantly rotates in the direction of rotation of the machining horn during feeding. This makes it difficult to feed the workpiece straight, and it is therefore necessary to feed the workpiece while straightening it with your fingertips, which increases the fatigue level. There were flaws.

This invention was devised to eliminate these drawbacks and achieve further effects, and one embodiment of this invention will be described in detail below.

In the figure, reference numeral 1 denotes a workbench that constitutes a part of the machine frame, and fixes the bed 2. An arm 3 is integrally formed in the upper part of the bed 2, and a motor 4 is fixed to the lower part. A pulley 5 is connected to the motor 4 and is configured to rotate a main shaft 7 supported within the arm 3 via a belt 6. A pulley 8 is fixed to the left end of the main shaft 7 in FIG.

A presser bar 12 is provided in the head portion 10 of the arm 3.
is supported to be slidable in the vertical direction, and a roller support 12a that rotatably supports the press roller 11 is fixed to the lower end of the presser bar 12. A stopper 13 is fixed to the middle part of the presser bar 12, and a presser spring 1 is installed between the stopper 13 and the arm 3.
4 is interposed to constantly press the presser bar 12 downward. A cam portion of a presser foot lifting lever 15 is in contact with the lower surface of the stopper 13.
When the presser bar 12 is raised upwards as shown in FIG. . When the presser foot lifting lever 15 is lowered downward as shown in FIG.
1.

As shown in FIG. 1, a frame 16 hanging downward is fixed to the lower surface of the bed 2. As shown in FIG. A pair of L-shaped supports 1 are provided on the sides of this frame 16.
7 is fixed. A casing 19 of a vibrator assembly 18 is rotatably supported by the pair of supports 17 via bearings (not shown) about a central axis in the vertical direction. An ultrasonic transducer 20 is integrally fixed within this casing 19,
The vibrator 20 is ultrasonically vibrated in the vertical direction when high frequency power is supplied.

A machining horn 21 having a cylindrical upper portion is integrally fixed to the ultrasonic vibrator 20, and the upper end surface of the machining horn 21 is disposed perpendicular to the vibration direction of the horn 21. A flat annular processed surface 22 is formed. This processed surface 22
A bottom plate 3 (described later) is inserted from the upper surface of the bed 2 through a circular hole 23 formed in the workbench 1 and the bed 2.
The presser roller 11 and the machining surface 22 are disposed at a position radially apart from the center of rotation of the press roller 11 and the machining surface 22 to face each other. Further, as shown in FIG. 2, at the contact portion between the presser roller 11 and the processing surface 22, the rotational directions of the presser roller 11 and the processing surface 22 are the same, and the workpiece 35, which will be described later, is linearly moved forward. It is configured so that it can be sent.

At the bottom of the vibrator assembly 18, a pair of current collecting rings 25 and 26 are connected to the casing 1 with an insulator 24 in between.
It is fixed so that it rotates together with 9. These current collecting rings 25 and 26 have spring contacts 27 and 28 fixed at one end to the frame 16.
are in contact with each other, one of the contacts 27 and 28 is connected to the positive pole of a high frequency oscillator (not shown), and the other is connected to the negative pole. Further, each of the current collecting rings 25 and 26 is connected to a respective pole of the ultrasonic transducer 20.

A pulley 29 is integrally fixed to the lower end of the vibrator assembly 18. Further, a motor 30 is fixed to the lower part of the frame 16, and the pulley 29 is connected to the motor 30 via a belt 31.

Now, the bottom plate 32 is embedded and laid flush on the upper surface of the bed 2, that is, it is located at the contact area between the press roller 11 and the pressing surface 22,
A guide hole 33 whose longitudinal direction is the above-mentioned feeding direction of the workpiece 35 is formed in a portion directly below the presser roller 11. Also, this floor plate 3
2, the workpiece 35 is located around the guide hole 33.
A portion along the outer periphery of the processing surface 22 beyond the contact portion between the presser roller 11 and the processing surface 22 in the feeding direction is bent downward, that is, toward the processing surface 22 side as shown in FIGS. 3 to 6 to form a tip. (Left side in Figure 5)
A rake portion 34 is formed which increases the sinking degree as one approaches the longitudinal side of the guide hole 33 (left side in FIG. 4), and the portion from the tip 34a to the base end 34b is formed. Edge 34c
is chamfered over its entire length to form a blade shape, and the edge 34c near the tip 34a is configured to be lower than the machined surface 22, as shown in FIG.

In such a configuration, when welding sheet-like workpieces 35 made of, for example, thermoplastic resin material, one on top of the other, first push up the presser foot lifting lever 15 to move the presser roller 11 to the upper position, as shown in FIG. to hold. Then, two or more workpieces 35 stacked one on top of the other are placed on the bottom plate 32 between the presser roller 11 and the machining horn 21, and after setting the machining start position, the presser foot lifting lever 15 is lowered and the workpiece 35 is pressed by the press roller 11 and held between the processing horn 21. When a processing start switch (not shown) is turned on in this state, high frequency power is supplied from a high frequency oscillator (not shown) to the ultrasonic vibrator 20 via the contacts 27 and 28 and the current collecting rings 25 and 26. Vertical ultrasonic vibrations are applied to the processing horn 21, and the overlapping workpieces 35 are welded together by the vibrations. At this time, the motors 4 and 30 are also energized, so the motor 4 rotates the presser roller 11 counterclockwise as shown by the arrow in FIG. 2, and the motor 30 rotates the machining horn 21 clockwise. . Therefore, the workpiece 35 is continuously welded while being sent forward as shown in FIG. Also, at this time, each time the welded part of the workpiece 35 reaches the processing surface 22, in other words, the guide hole 33 of the bottom plate 32, the workpiece 35 is pressed down by the presser roller 11 and sinks by the thickness of the bottom plate 32, In this depressed state, the guide hole 33 is fed along the left and right edges of the guide hole 33 while its movement to both sides is suppressed, so that even though the machining horn 21 is pulled in the direction of rotation, it is prevented from shifting in this direction. It will be sent straight away. On the other hand, when the workpiece 35 is fed with the part to be welded depressed at the guide hole 33, at the beginning of the feed it is depressed as shown by arrow A in FIG. As shown in B, there is a concern that the edge of the workpiece 35 that is being fed will hit the edge of the guide hole 33 located ahead in the feeding direction and the further feeding of the workpiece 35 will be delayed. In the embodiment, a scoop portion 34 is provided at the forward end of the welded portion of the workpiece 35 when it passes through the guide hole 33, and this is the tip 3 of the workpiece 35.
4a and the end edge 34c to the base end 34b, the workpiece 35 is scooped up to the upper surface of the bottom plate 32 as shown by the arrow C in the same figure, thereby realizing extremely smooth feeding without any stagnation as described above. It's something you get.

In this embodiment, a configuration is shown in which both the presser roller 11 and the machining horn 21 are rotationally driven by the motors 4 and 30, respectively, but the presser roller 1
1 and the machining horn 21 are both rotatably supported, only one of them can be driven to rotate, and the other can be configured to be driven by the driving force via the workpiece 35. Further, the machining surface 22 of the machining horn 21 may be formed in an annular or circular shape.

As detailed above, the bottom plate of the ultrasonic processing machine according to this invention has a guide hole located at the contact area between the processing surface of the processing horn and the presser roller and whose longitudinal direction is the feeding direction of the workpiece. , with a configuration having a scoop portion that scoops up the workpiece at the tip of the contact portion between the presser roller and the processing surface in the feeding direction of the workpiece, the straightness of the workpiece can be improved and smooth feeding can be achieved. This makes it possible to achieve a number of excellent effects, such as almost no need for correction work using fingertips, etc., which can sufficiently reduce fatigue and allow work to be carried out efficiently.

[Brief explanation of the drawing]

Fig. 1 is a partially broken front view of the main part showing an embodiment embodying this invention, Fig. 2 is a perspective view of the main part,
Fig. 3 is an enlarged plan view of the guide hole portion of the bottom plate, Fig. 4 is a sectional view taken along the - line in Fig. 3, and Fig. 5 is a - line sectional view in Fig. 3.
The line sectional view and FIG. 6 are enlarged perspective views of the bottom plate guide hole portion. In the figure, 11 is a presser roller, 18 is a vibrator assembly,
20 is an ultrasonic vibrator, 21 is a processing horn, 22
32 is a processing surface, 32 is a bottom plate, 33 is a guide hole, and 34 is a rake portion.

Claims (1)

[Scope of utility model registration request] A machining horn applies ultrasonic vibration to a circular or annular machining surface in a direction perpendicular to the machining surface, and a sheet-shaped In an ultrasonic processing machine that has a presser roller that clamps a workpiece, and continuously welds the workpiece while rotating the presser roller and a machining horn, the contact portion between the presser roller and the processing surface is A bottom plate is provided in which a guide hole is formed whose longitudinal direction is the feeding direction of the workpiece, and the bottom plate is provided along the outer periphery of the processing surface in the forward direction of the contact portion between the presser roller and the processing surface in the feeding direction of the workpiece. A bottom plate for an ultrasonic processing machine, characterized in that a portion is bent toward the processing surface side to form a scoop portion for scooping up a processed workpiece.