JP2001129672A - Ultrasonic welding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic welding machine which allows confirmation of the welding time without relying on the eye-sight. SOLUTION: In the ultrasonic welding machine in which ultrasonic vibration is generated by applying voltage of oscillating frequency from oscillation circuit 157 on the welding machine 11, transmitted to the horn 21 of the welding machine 11 making the processing surface 21a of the horn 21 in a state of ultrasonic vibration to melt the part of the object 30 to be welded, there is provided an annunciating means 171 to annunciate the completion of welding within the welding time via sound. Also there is provided a delay circuit 173 connected in series with the annunciating means 171 so that the annunciating means 171 works after the designated time from the start of timer circuit 158 and switch device 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic welding machine for melting an object to be welded by ultrasonic vibration and welding.

[0002]

2. Description of the Related Art As shown in FIG. 8, a conventional ultrasonic welding machine melts and welds an object to be welded by ultrasonic vibration, and an oscillator connected to the welding machine body 411. And a power supply device 441. Welding machine body 41
Reference numeral 1 denotes an ultrasonic output device 423 having a horn 421 in which a processing surface 421a is formed on a part of the outer peripheral surface of the distal end portion so as to melt and weld the object to be welded 430 by ultrasonic vibration, and the ultrasonic output device 423 Casing member 42 holding the
5 and a handle member 427 rotatably attached to the casing member 425.

An ultrasonic output device 423 is held inside a casing member 425. The tip of the horn 421 extends outward from one end of the casing member 425. The casing member 425 includes the handle member 4
The other end of the handle member 427 is rotatably connected to the outer wall of the casing member 425 by a pin 429 so that the handle member 27 can be turned.

The tip of the handle member 427 is
It is bent so as to face the 21 processing surface 421a. At the tip of the handle member 427, a pressing surface 427a for pressing the object to be welded 430 against the processing surface 421a for a predetermined time and maintaining this pressing state is formed. A horn 421 is provided between the casing member 425 and the handle member 427.
Processing surface 421a and pressing surface 427 of handle member 427
A spring member 433 that urges in the direction in which the member a is separated is interposed.

[0005] Further, the other end of the handle member 427 is provided with a spring surface 433 and a processing surface 421 a and a pressing surface 42.
A stopper 435 is provided to limit the gap between the stopper 7a and the gate 7a from a predetermined distance. Casing member 42
5 and the handle member 427, the switch device 50
0 is provided. The switch device 500 includes a micro switch 501 fixed to a casing member 425.
And an operating bar 503 opposed to the operating portion of the microswitch 501 and fixed to the handle member 427.

[0006] The ultrasonic output device 423 includes a cable 480.
Is connected to the oscillation power supply device 441 via the. As shown in the circuit diagram of FIG. 9, the oscillation power supply 441 includes an oscillation circuit 457 connected to a power plug 451 and a timer circuit 4 connected to the output side of the oscillation circuit 457.
55.

Further, a power supply lamp 461 and a protection resistor 463 connected in series are connected between the power supplies on the input side of the power supply circuit 453. A power switch 464 is provided between one of the power plugs and a connection point between the line and the power lamp 461. Further, the oscillation circuit 45
7 has a light emitting diode 4 connected in series at the output side.
65 and the protection resistor 467 are connected.

A power switch button 464 for opening and closing the power switch 464 is provided on one side of the oscillation power supply 441.
a, a power lamp 461, a light emitting diode 465, and a timer dial 455a for setting the time of the timer circuit 457.

In this ultrasonic welding machine, a welding portion of the welding object 430 is welded in order to seal an opening of the welding object 430 such as a resin pack. In such work, first, the operator operates the power switch button 464a to turn on the power switch 464. At this time, the power lamp 461 is turned on. Then, the timer dial 455a for setting the welding time is set to a predetermined time. Next, the casing member 425 and the handle member 42
7 with one hand, and further, the processing surface 421 of the horn 421
Positioning is performed such that a welding portion of the object to be welded 430 is interposed between the a and the processing surface 427a of the handle member 427.

After the alignment is completed, when the handle member 427 is manually pulled so as to move to the casing member 425 side, the welding portion of the object 430 to be welded is held while the processing surface 421a is pressed by the pressing surface 427a. You. At this time, the operating portion of the micro switch 501 is pressed by the operating bar 503, and the switch device 50 is pressed.
0 turns ON. Here, the light emitting diode 465 is turned on, and the voltage of the oscillation frequency from the oscillation circuit 457 is applied to the ultrasonic output device 423 to generate ultrasonic vibrations. Ultrasonic vibration occurs, and the welded part of the object to be welded 430 is melted and welded.

Therefore, since the ultrasonic vibration is transmitted from the ultrasonic vibrating device 423 via the horn 421 to the welding portion of the object 430 to be welded, the horn 421 in the welding operation.
The welding operation is completed while the light emitting diode 465 is turned on within the time set by the timer circuit 455 from the time when the processed surface 421a starts melting the object to be welded 430 to the time when the welding is completed (for example, JP-A-8-23
0042).

[0012]

In the conventional ultrasonic welding machine, the processing surface 421a is brought into an ultrasonic vibration state while being pressed against the processing surface 421a by the pressing surface 427a, and the welding portion of the object 430 is melted. Since the resulting welding is performed, the welding time is an important point that determines the quality of the welding state at the welding location of the object 430 to be welded.

However, in the conventional ultrasonic welding machine,
The oscillation power supply 441 is placed on a table and the casing member 42 is
5 to perform welding work, or hold the oscillation power supply device with the other hand to perform welding work. Therefore, since the worker concentrates on the work of welding a plurality of welding locations on the object to be welded 430 during the welding work, the worker does not visually check the state in which the light emitting diode 465 is turned on or the state in which the light emitting diode 465 is turned off. Therefore, there is a problem that a welding failure occurs due to an error in the welding state of the welding location due to the above operation.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ultrasonic welding machine which enables a welding operation to be performed while visually confirming a welding point, thereby improving a welding state at the welding point.

[0015]

According to the present invention, a welding machine main body for melting and welding a material to be welded by ultrasonic vibration,
An oscillating power supply for generating an ultrasonic vibration by applying a voltage of an oscillation frequency to the welding machine main body, wherein the welding machine main body has a horn having a machined surface formed at a tip portion so as to weld the object to be welded. An ultrasonic output means, a pressing means having a pressing surface for pressing a welding point of the object to be welded to the processing surface, and the oscillation when the processing surface is pressed by the pressing surface of the pressing means. A switching device for applying a voltage of an oscillation frequency from a power supply device to the ultrasonic output means, wherein the oscillation power supply device is connected to a power supply circuit, and the ultrasonic output means is connected to the power supply circuit and connected to the power supply circuit. An ultrasonic circuit including an oscillation circuit for applying a voltage having an oscillation frequency to the oscillation circuit, and a timer circuit connected to the oscillation circuit and operating the oscillation time at a predetermined time. Ultrasonic welding machine is obtained, wherein the applying a voltage of the oscillation frequency ultrasonic vibration al has an informing means for informing by sound welding time within the time has occurred.

[0016]

According to the present invention, the operator operates the power switch button to turn on the power switch. At this time, a timer circuit for setting the welding time is set to a predetermined time. Next, the welding machine body is grasped with one hand. Positioning is performed so that a welded portion of the object to be welded is interposed between the processing surface of the horn and the pressing surface of the anvil.

After the positioning, when the welding point is held by the pressing surface of the pressing means, the switch device is turned on.
The sound of the notification means sounds, and the voltage of the oscillation frequency from the oscillation circuit is applied to the ultrasonic output device to generate ultrasonic vibration, which is transmitted to the horn and the processed surface is subjected to ultrasonic vibration. In this state, the welding position of the object to be welded is melted and welding is performed. Therefore, the operator can confirm the welding to the object to be welded by the ear.

Further, since the ultrasonic vibration is transmitted from the ultrasonic vibration device to the welding portion of the object to be welded through the horn, the welding is completed from the time when the processing surface of the horn begins to melt the object to be welded in the welding operation. Until the time set by the timer circuit is performed. After the set time has elapsed, the oscillation and the sound notification are terminated.

After the welding for a predetermined time is completed, if the pressure of the pressing means held by the hand is released, the working surface and the pressing surface are separated from each other, and the switch device is also turned off.
Since F is applied, the application from the oscillation power supply can be stopped, and the timer circuit is reset.

Further, in the present invention, after the alignment is completed, the welding portion of the object to be welded is held in a state where it is pressed against the processing surface by the pressing surface of the pressing means, and the switch device is turned ON.
Becomes In this state, the oscillation circuit starts operating, the timer of the timer circuit starts, the oscillation operation is performed, and the delay circuit operates at the same time.

Next, a voltage having an oscillation frequency from an oscillation circuit is applied to the ultrasonic output device to generate ultrasonic vibrations, which are transmitted to the horn, and the processed surface is brought into an ultrasonic vibration state. The welding point of the object is melted and the welding is performed. However, the notification means sounds with a delay by the delay circuit, and the notification of the oscillation and the sound is terminated as soon as the timer set time elapses.

Further, according to the present invention, after the oscillation circuit is operated, when there is no welded material between the processing surface and the pressing surface of the anvil, the processing surface and the pressing surface are erroneously short-circuited. At this time, it is determined whether or not this short circuit has occurred. If the short circuit has occurred, the idle circuit is detected by the feedback circuit, and the oscillation circuit and the notification unit are turned off. The timer circuit may measure the number of oscillations and determine the set time of the timer.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An ultrasonic welding machine according to the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of an ultrasonic welding machine according to the present invention.

Referring to FIG. 1, the ultrasonic welding machine according to the present embodiment has a welding machine main body 11 and an oscillation power supply device 141 connected to the welding machine main body 11.
The welding machine main body 11 holds an ultrasonic output device 23 having a horn 21 having a processing surface 21a formed at a tip end so as to melt and weld the object 30 to be welded by ultrasonic vibration, and the ultrasonic output device 23. Casing member 25, and handle member 31 rotatably attached to casing member 25.
And the handle member 3 attached to the casing member 25.
And an anvil member 41 which can be rotated by the rotation of the first member.

An ultrasonic output device 23 is held inside the casing member 25. The tip of the horn 21 extends outward from one end of the casing member 25 on the right side of the paper surface of FIG. In the lower part of the casing member 25,
Handle member 31 and anvil member 4 as pressing means
A pair of parallel shaft support walls 27 are formed near one end so as to be rotatable. One end of the handle member 31 is connected to the casing member 25.
Is rotatably engaged with a handle shaft 33 provided on the shaft support wall 27. The anvil member 41 has an anvil bar 43 and an anvil 45 provided at one end of the anvil bar 43.

The anvil bar 43 extends between one end of the handle member 31 and the casing member 25 and extends from the handle shaft 33 to the other end of the handle member 31 at the other end. Are rotatably engaged by an anvil pin 44.

The handle member 31 has a handle pin 35 in contact with the anvil bar 43 at a position between the handle shaft 33 and the anvil pin 44. Anvil bar 43 is connected to casing member 25 and handle member 3 from the other end engaged with anvil pin 44.
The horn 21 is bent so as to extend between the horn 21 and one end thereof. The anvil 45 is made by, for example, extruding an aluminum material, and has an anodized aluminum surface. The anvil 45 is bent toward the processing surface 21a of the horn 21, and the tip surface of the anvil 45 is a pressing surface 45a facing the processing surface 21a. The other end of the anvil member 41 and the anvil 45 are removably fastened and fixed by screws 47.

Further, between the casing member 25 and the anvil bar 43, there is provided an elastic member 55 biasing in a direction for separating the processing surface 21a of the horn 21 and the pressing surface 45a of the anvil 45 from each other. . Handle member 31
The handle cover 57 is screwed from the other end to the middle part.
8 fastened to the handle member. The handle cover 57 is a portion that can be gripped by a human finger.

A reed switch 61 is provided inside the casing member 25 at a position facing the handle cover 57. The handle member 31 is provided with a magnet 63 at a portion facing the reed switch 61. The magnet 63 is, for example, a rubber magnet, and employs an anisotropic flexible magnet.
The reed switch 61 and the magnet 63 constitute a switch device 60 with these components.

The pressing surface 45a of the anvil 45 presses the workpiece 30 against the processing surface 21a and keeps the state for a predetermined time. The handle shaft 35 provided on the handle member 31 also serves to limit the rotation of the anvil member 41 by the elastic member 55 and the separation of the processing surface 21a and the pressing surface 45a from each other more than a predetermined distance. Elastic member 5
Reference numeral 5 may be a coil spring, a leaf spring, an air spring, rubber, sponge, or any other material having elasticity.

The horn 21 has a cylindrical portion having a large diameter and a conical portion, and a flange 71 having a flange shape is provided on the conical portion. The flange 71 engages with an engagement groove (not shown) formed at a contact point between the casing member 25 and a mounting member 73 provided on one side of the casing member 25, whereby the horn 21 It is held by the casing member 25. The ultrasonic vibration is transmitted to the horn 21 in the axial direction. Further, a part of the outer peripheral surface of the conical portion having a small diameter is formed in a flat shape, and the horn 21 is in contact with the workpiece 30 as the processing surface 21a. Contact and transmit ultrasonic vibrations.
The ultrasonic output device 23 is adjacent to the horn 21 and has electrodes,
A ceramic vibrator 75 is provided.

The ceramic vibrator 75 is connected to an external oscillation power supply 141 via an electrode and a cable 77. When a voltage having a predetermined oscillation frequency is applied from the oscillation power supply device 141 via the electrode and the cable 77, the ceramic vibrator 75 generates ultrasonic vibration. This ultrasonic vibration is transmitted to the horn 21 and the processing surface 2
1a performs ultrasonic vibration in the horizontal direction.

The ultrasonic output device 23 is held by the casing member 25 together with the casing member 25 from a direction parallel to the vibration direction of the processing surface 21a of the horn 21. The casing member 25 is formed of a substantially cylindrical plate-like member, and has a flange 71 of the horn 21 at one end thereof.
A through hole 25a slightly smaller than that is provided. A part of the large cylindrical portion and the conical portion of the horn 21 is engaged with the through hole 25a in a fitted state. Above the casing member 25, a through hole 73a into which the conical portion of the horn 21 can be inserted. Is attached by a screw 74.

Further, the handle member 31 and the anvil member 41 always have a constant angle with respect to the casing member 25 in a natural state in which no external force is applied to the elastic member 55. As a result, it is possible to restore the processing surface 21a of the horn 21 and the pressing surface 45a to a state having a constant interval.

In the natural state, the handle member 31 and the casing member 25 are substantially parallel to each other, and the anvil member 41 is at an acute angle to the casing member 25. Therefore, at the time of work, the handle member 31 is pulled toward the casing member 25 against the return force of the elastic member 55 to perform the work of ultrasonic welding. At this time, since the pulling operation is performed by a human grasping force, it is desirable that the handle cover 57 has a size corresponding to the size of the human hand. In the present embodiment, the length of the casing member 25 including the horn 21 extending outside is 139 mm, and the handle member 31 and the anvil member 4 are within the range of the length.
1 is set.

From the oscillation power supply device 141 to the ultrasonic output device 2
The application of the voltage of the oscillation frequency to 3 is performed by a reed switch 61 which is a switch device 60 and a magnet 63. Thus, when the handle member 31 is pulled toward the casing member 25 to perform the welding operation, the magnet 63 approaches the reed switch 61 and the reed switch 61 is turned on, so that a voltage is applied.

As shown in the circuit diagram of FIG. 2, the oscillation power supply device 141 includes a power supply circuit 153 connected to the power supply plug 151, an oscillation circuit 157 connected to the output side of the power supply circuit 153, A timer circuit 158 connected to the output side of the oscillation circuit 157. The timer circuit 158 measures the number of oscillations and calculates a timer set time.

Further, a power supply lamp 161 and a resistor 16 connected in series are connected between the power supplies on the input side of the power supply circuit 153.
3 are connected. A power switch 164 is provided between one of the power plugs 151 and a connection point between the line and the power lamp 161. On the output side of the oscillation circuit 157, a light emitting diode 165 as a display means and a protection resistor 167 are connected in series. Further, a buzzer 171 is connected to the output side of the oscillation circuit 157 as a notification unit for notifying by sound in parallel with the light emitting diode 165 and the protection resistor 167.

On one surface of the panel of the oscillation power supply 141,
A power switch button 164a for opening and closing the power switch 164, a power lamp 161, a light emitting diode 165
And a timer dial 155a, a buzzer 171, and a cable 77 for setting the time of the timer circuit 157.
A connector 175 for detachably connecting the plug 77a is provided. In this ultrasonic welding machine, a welding portion of the welding target 30 is welded in order to seal an opening of the welding target 30 such as a resin pack. In this ultrasonic welding machine, the welding operation is completed in a display time in which the light emitting diode 165 is turned on and the buzzer 171 is sounding within a set time.

Next, the operation of the first embodiment will be described by taking as an example the operation of welding the opening of the workpiece 30 such as a resin pack. First, the operator operates the power switch button 164a to turn on the power switch 164. At this time, the power lamp 161 is turned on. And a timer dial 155 for setting the welding time.
a is set to a predetermined time. The worker is the casing member 2
5 and the handle cover 57 of the handle member 31 are held with one hand, and the welding machine main body 11 is held by hand. And the welding machine body 1
1 is brought closer to the welding portion of the object 30 to be welded, and positioning is performed so that the welding portion of the object 30 is interposed between the processing surface 21a of the horn 21 and the pressing surface 45a of the anvil 45.

After the alignment, the handle member 3
When the handle 1 is manually pulled to move to the casing member 25 side, the handle member 31 rotates around the handle shaft 33, and the handle pin 35 provided on the handle member 31 pushes up the anvil bar 43. At this time, the anvil bar 43 rotates about the anvil pin 44 by leverage.

After the positioning is completed, the handle member 27 is manually pulled so as to move to the casing member 25 side.
a is held in a state pressed against the processing surface 21a. At this time, the magnet 63 of the switch device 60 approaches the reed switch 61, and the switch device 60 is turned on. Then, the light emitting diode 165 turns on and the buzzer 1
With the sound of 71, the voltage of the oscillation frequency from the oscillation circuit 157 is applied to the ultrasonic output device 23 to generate ultrasonic vibration, which is transmitted to the horn 21 and the processing surface 21a is in an ultrasonic vibration state. Thus, the welded portion of the article 30 to be welded is melted and welded.

Therefore, when the handle member 31 is drawn toward the casing member 25,
The welded portions 0 are the processing surface 21a of the horn 21 and the anvil 4
The ultrasonic vibration is transmitted to the welding point in a state where a predetermined pressing force is applied between the pressure applying surface 45a and the pressure applying surface 45a, and the object 30 is melted and welded.

Further, the horn 2
The ultrasonic vibration is transmitted to the welding portion of the workpiece 30 through the welding work 1, so that the processing surface 21 of the horn 21
The time from the start of melting the object 30 to the completion of welding is performed for the time set by the timer circuit 158.

After the welding for a predetermined time is completed, if the handle cover 57 gripped by hand is loosened, the anvil member 41 is rotated in the direction opposite to the welding direction by the urging force of the first elastic member 55. And the processing surface 21a and the pressing surface 45a
And the reed switch 61 and the magnet 63 are also separated from each other, so that the application from the oscillation power supply 141 can be stopped, and the timer circuit 158 is reset.

FIGS. 3 to 5 show a second embodiment of the ultrasonic welding machine. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The circuit shown in FIG. 3 has a configuration obtained by adding a delay circuit 173 to the circuit configuration of the first embodiment shown in FIG. The delay circuit 173 is provided in series with the buzzer 171.

FIG. 4 is a flowchart of the ultrasonic welding machine having the delay circuit 173, and FIG. 5 is a timing chart. Hereinafter, the second embodiment will be described with reference to FIGS. 4 and 5 together with FIG.

First, similarly to the first embodiment, the operator holds the casing member 25 and the handle member 31 shown in FIG. 1 with one hand. Then, the power switch button 164
a is operated to turn on the power switch 164 (FIG. 4
), And the power supply V shown in FIG. 5 is turned on. At this time, the power lamp 161 shown in FIG. In addition,
In FIG. 5, the power lamp is indicated by L. Then, the timer dial 155a for setting the welding time is set to a predetermined time. Then, the operator holds the casing member 25 and the handle cover 57 of the handle member 31 with one hand to hold the ultrasonic welding machine. Further, the ultrasonic welding machine is used to
, And the positioning is performed such that the welding portion of the workpiece 30 is interposed between the processing surface 21a of the horn 21 and the pressing surface 45a of the anvil 45.

After the positioning of the object 30 to be welded is completed, the handle member 31 is manually pulled to move to the casing member 25 side.
The handle member 31 rotates about the axis 3, and the handle pin 35 provided on the handle member 31 pushes up the anvil bar 43. At this time, the anvil bar 43 rotates about the anvil pin 44 by leverage.

After the positioning is completed, when the handle member 27 is manually pulled so as to move to the casing member 25, the welding portion of the workpiece 30 is pressed against the processing surface 21a by the pressing surface 45a. Held in state. At this time, the magnet 6 of the switch device 60
3 approaches the reed switch 61, and the switch device 60 indicated by SW in FIG. 5 is turned on (step S1 in FIG. 4).

In this state, the oscillation circuit 157 starts operating (step S2 in FIG. 4). Then, the light emitting diode 165 is turned on (the LED shown in FIG. 5), and the timer (TM shown in FIG. 5) of the timer circuit 158 set as the timer is started (step S3 in FIG. 4). At this time, the oscillation indicated by the OS in FIG. 5 is performed.

Next, the delay circuit 173 operates (step S4 in FIG. 4), and the buzzer 171 shown by B in FIG.
Sounds with a delay of T1 (step S5 in FIG. 4). Then, a voltage having an oscillation frequency from the oscillation circuit 157 is applied to the ultrasonic output device 23 to generate ultrasonic vibration, which is transmitted to the horn 21 and the processed surface 21a is brought into an ultrasonic vibration state.

When the handle member 31 is pulled toward the casing member 25, the welding portion of the object 30 is welded to the processing surface 21 a of the horn 21 and the pressing surface 4 of the anvil 45.
Ultrasonic vibration is transmitted to the welding point in a state where a predetermined pressing force is applied while being sandwiched between the welding target 5a and the welding target 30 is melted and welded.

Accordingly, since the ultrasonic vibration is transmitted from the ultrasonic vibration device 23 to the welding portion of the object 30 to be welded through the horn 21, the processing surface 21a of the horn 21 melts the object 30 in the welding operation. The time from the beginning until the welding is completed is the time set by the timer circuit 158,
For example, the oscillation time T1 shown in FIG. 5 is performed for 1.5 seconds. The delay time of the delay circuit 173 is, for example, T2,
This is set to 0.8 seconds.

Next, it is determined whether or not the set time of the timer has elapsed (step S6 in FIG. 4). After the set time has elapsed, the buzzer 171 is turned off (step S6 in FIG. 4).
7). When the set time of the timer has not elapsed, the buzzer 171 continues to sound. Next, when the handle member 31 is loosened, the switch device 60 is turned off (step S8 in FIG. 4). Then, the timer is reset (step S9 in FIG. 4). Then, the power is turned off and the operation is completed. Here, T1 is an example that can be set, but T1 and T2 are timer dials 155.
The setting method is not limited to a, and may be a fixed method.

FIG. 6 shows a third embodiment in which a feedback circuit 181 for preventing an idling is provided in the circuit configuration of the second embodiment. Here, the blanking is defined as the processing surface 2 of the horn 21 when the object 30 is not present between the processing surface 21a of the horn 21 and the pressing surface 45a of the anvil 45.
When a short circuit occurs between the pressure circuit 1a and the pressurizing surface 45a of the anvil 45, this is fed back to prevent the short circuit. The feedback circuit 181 is connected to the output side of the timer circuit 158 via an output transformer (not shown). It is connected between the ultrasonic vibration device 23.

FIG. 7 shows an operation flow of the ultrasonic welding machine provided with the feedback circuit 181 for preventing a blank hit shown in FIG. Note that this operation flow is different from the operation flow shown in FIG. 4 only in the steps of the feedback circuit 181, and therefore, the steps for the description of the other operations are omitted.

Referring to FIGS. 6 and 7, oscillation circuit 157
Operates (step S2 in FIG. 7), the delay circuit 173
The buzzer 171 does not sound for a predetermined time due to the
When the workpiece 30 does not exist between the horn 21 and the pressing surface 45a of the anvil 45 and the pressing surface 45a of the anvil 45 is short-circuited, there is no short-circuit between the processing surface 21a of the horn 21 and the pressing surface 45a of the anvil 45. (Step S1 in FIG. 7)
1). Then, when the short circuit occurs, the state of idling is detected by the feedback circuit 181 (step S12 in FIG. 7).
Then, the oscillation circuit 157 and the buzzer 17 in step S7 in FIG.
1 is turned off (step S7 in FIG. 7). The other operation flow is the same as the operation flow shown in FIG.

In the first and second embodiments, the switch device 60 has been described by using the reed switch 61 and the magnet 63, but a well-known switch such as a micro switch may be used instead. Good. In addition, the delay time is set to a time required for holding the workpiece 30 after the handle member 31 is gripped and the oscillation starts.

[0061]

As described in the above embodiments, in the ultrasonic welding machine according to the present invention, when the welding point is held by the pressurizing surface of the pressurizing means, the switch device is turned on, and the sound of the notification means is sounded. When the sound is heard, the voltage of the oscillation frequency from the oscillation circuit is applied to the ultrasonic output device to generate ultrasonic vibration, which is transmitted to the horn and the processed surface is in an ultrasonic vibration state, and the object to be welded is Is welded and the welding is performed, so that the operator can confirm the welding to the object to be welded by ears, so that a reliable welding operation can be performed.

Since the ultrasonic vibration is transmitted from the ultrasonic vibration device to the welding portion of the object to be welded via the horn, the welding is completed from the time when the processing surface of the horn starts melting the object to be welded in the welding operation. Since the time until the time is set by the time set by the timer circuit, the timer dial can be omitted.

Further, according to the present invention, after the positioning is completed, the welding portion of the object to be welded is held in a state where it is pressed against the processing surface by the pressing surface of the pressing means, and the switch device is turned ON.
In this state, the oscillating circuit starts operating, the delay circuit operates, and at the same time, the timer of the timer circuit starts and the oscillating operation is performed. Since the time required for sandwiching the object to be welded has been set since the start of gripping and oscillation, even if there are variations in the work time for sandwiching the object to be welded, the welding time is sufficient with the sound of the buzzer. You can check whether or not. This makes it possible to eliminate the setting by the timer circuit.

Further, according to the present invention, when an object to be welded is not present between the processing surface and the pressurized surface after the oscillation circuit operates, when the work surface and the pressurized surface are short-circuited, It is determined whether or not there is a short circuit, and if a short circuit occurs, the state of idle driving is detected by a feedback circuit, and the oscillation circuit is turned off, so that a safe ultrasonic welding machine can be provided.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a first embodiment of an ultrasonic welding machine according to the present invention.

FIG. 2 is a block diagram showing a circuit configuration of the ultrasonic welding machine shown in FIG.

FIG. 3 is a block diagram showing a second embodiment of the ultrasonic welding machine according to the present invention and showing a circuit configuration.

FIG. 4 is an operation flowchart of the ultrasonic welding machine shown in FIG. 3;

5 is a timing chart based on the operation flow of the ultrasonic welding machine shown in FIG.

FIG. 6 is a block diagram showing a third embodiment of the ultrasonic welding machine according to the present invention and showing a circuit configuration.

FIG. 7 is an operation flowchart of the ultrasonic welding machine shown in FIG. 6;

FIG. 8 is a front sectional view of a conventional ultrasonic welding machine.

9 is a circuit configuration diagram of the ultrasonic welding machine shown in FIG.

[Explanation of symbols]

 11,411 Welding machine main body 21,421 Horn 21a, 421a Working surface 23,423 Ultrasonic wave output device 25,425 Casing member 27 Shaft support wall 30,430 Welding object 31,427 Handle member 33 Handle shaft 35 Handle pin 41 Anvil member 43 Anvil bar 44 Anvil pin 45 Anvil 45a, 427a Pressing surface 55 Elastic member 60 Switch device 61 Reed switch 63 Magnet 141, 441 Oscillation power supply 153, 453 Power supply circuit 157, 457 Oscillation circuit 158, 455 Timer circuit 171 Buzzer 173 Delay circuit 181 Feedback circuit

Claims (4)

[Claims] 1. A welding machine main body for melting and welding an object to be welded by ultrasonic vibration, and an oscillation power supply device for applying an oscillation frequency voltage to the welding machine main body to generate ultrasonic vibration, The welding machine main body has an ultrasonic output means having a horn having a processing surface formed at a tip end for welding the workpiece, and a pressurizing surface which presses a welding point of the welding target to the processing surface. A pressure device, and a switch device for applying a voltage of an oscillation frequency from the oscillation power supply device to the ultrasonic output device when the processing surface is pressed by the pressure surface of the pressure device; The power supply device is connected to a power supply, a power supply circuit, an oscillation circuit connected to the power supply circuit and for applying a voltage of an oscillation frequency to the ultrasonic output means, and connected to the oscillation circuit to operate the oscillation time at a predetermined time. timer In the ultrasonic welding machine including a circuit, the oscillating power supply device, by applying a voltage of the oscillating frequency from the oscillating circuit, to notify the welding time by sound within the time during which ultrasonic vibration is generated An ultrasonic welding machine characterized by having: 2. The ultrasonic welding machine according to claim 1,
The ultrasonic welding machine, wherein the notifying means is provided between the oscillation circuit and the ultrasonic output means, and is provided in parallel with the ultrasonic output means. 3. The ultrasonic welding machine according to claim 1,
After the switch device and the timer circuit are turned on,
An ultrasonic welding machine comprising: a delay circuit connected in series to the notification means so that the notification means is operated with a delay of a predetermined time after a predetermined time. 4. The ultrasonic welding machine according to claim 1,
An ultrasonic welding machine, comprising: a feedback circuit that detects an idling state when the processing surface and the pressing surface are short-circuited and turns off oscillation of the oscillation circuit.