JP3249279B2 - High frequency welding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application] It is mainly used at the medical site, for example, at the end of blood collection or blood donation of components at the blood donation room of the Japanese Red Cross Blood Center, when collecting a sample or removing a bag, and also at the end of dialysis. The invention also relates to a high-frequency welding device which can likewise be used for processing tubes.

[0002]

2. Description of the Related Art At present, a high-frequency welding apparatus has been put to practical use in which an electrode section, a high-frequency oscillation section, and a sweeping means for instructing high-frequency oscillation are integrated into a single unit and external power is supplied. I have. In a foreign-made high-frequency welding apparatus, a type in which the electrode portion is operated with one hand, but the high-frequency oscillation portion and the power supply portion are integrated into another housing and integrated, and connected by a connection cord has been put to practical use.

In these practically used high-frequency welding apparatuses, it is necessary that the storage battery of the power supply section be made sealable a certain number of times or more (for example, so that it can be used for at least half a day). Further, in order to operate the high-frequency oscillator, it is necessary to flow a large current of 1 A to 3 A at a time at a voltage of about 50 V DC and at the same time. It was large and heavy to connect. For this reason, the power supply unit (storage battery) has been used by mounting it on a trolley, hanging it from the shoulder, or attaching it to the waist. In this case, since the tube sealer main body and the power supply unit (rechargeable battery) are connected by a connection cord, the degree of freedom in operation is somewhat limited. Also, if some trouble occurs in the high-frequency oscillator and the voltage converter and a large current flows, the voltage converter becomes overloaded, and if it exceeds a certain amount, the voltage converter may be damaged, and as a result, the high-frequency oscillation The parts may also be damaged and may not be reused. Alternatively, the voltage conversion unit itself may be defective and take a larger amount of current than the storage battery unit. The inventor of the present invention has made intensive studies in order to solve the above-mentioned problems, and has arrived at the following invention.

[0004]

Means for Solving the Problems [1] The present invention provides a tube seal electrode section 7 , a high-frequency oscillation section 2 , a trigger section 5 for instructing high-frequency oscillation, and a storage battery section 6 for supplying electric power.
Has the door, and portable these members with one hand, a high-frequency welding apparatus 1 sealing operation of the tube was placed in easy housing 8, the battery in the housing 8
A voltage converter 3 for boosting a voltage is arranged, and the storage battery 6
Is connected to the voltage converter 3, and the voltage converter 3
An oscillator 2 is connected, and the high-frequency oscillator 2 is connected to the seal electrode.
Part 7 is connected to the protection circuit of at least one of the voltage conversion section 3 is selected from the following 40, 50, 60 and 70
To provide a high frequency welding device 1 arranged. (A) The protective fuse 21 and the DC current detecting element 31
A protection circuit disposed between the voltage conversion unit 3 and the storage battery unit 6;
Road 40, in the protection circuit 40 (B) wherein (A), the thyristor
33 denotes the protection fuse 21 and the DC current detecting element 3
1, (C) voltage conversion of the protection fuse 21 and the overcurrent detection resistor R
(D) At least one of a transistor, a field-effect transistor, and a gate turn-off thyristor is disposed as a power semiconductor element in the protection circuits 40, 50, and 60 disposed between the unit 3 and the storage battery unit 6. The protection circuit 70 which controls on / off by these means,

[2] The present invention provides a seal electrode portion of a tube.
7 , a high-frequency oscillation unit 2 , a trigger unit 5 for instructing high-frequency oscillation, and a storage battery unit 6 for supplying electric power. These members are portable with one hand, and the tube sealing operation is easy. Frequency welding device 1 installed in a simple housing 8
And a voltage for increasing a battery voltage in the housing 8.
The voltage conversion unit 3 is disposed in the storage battery unit 6.
And the high-frequency oscillator 2 is connected to the voltage converter 3.
Connecting the seal electrode section 7 to the high-frequency oscillation section 2;
Power on / off at least one of the following selected from
Provided is a high-frequency welding apparatus 1 provided with a means for performing an OFF operation. (A) The on / off function unit 35 is connected to the voltage conversion unit 3
It is arranged between the storage battery units 6 and turned on / off by an electric signal.
(B) applying an on / off signal to the IC of the voltage conversion unit 36,
The voltage conversion unit 36 is connected to the high-frequency oscillation unit 2 and the storage battery unit.
6 and turned on / off by an on / off signal.
Means for performing, a magnet 41 is attached to (C) the trigger portion 5, the hand
Attach the magnetic detection member 42 to the part 4 side, and
Hand that detects the movement of the magnet 41 and turns it on / off
Mounting stage, the micro-switch 46 (D) the hand section 4
Then, a switch-on projection 47 is attached to the trigger portion 4.
The microswitch 46 and the switch are detected by a detection circuit.
The movement of the contact point of the switch-on projection 47 is detected and turned on / off.
Means for performing a full, a magnet 51 instrumentation to the movable electrode portion 7a of the (E) sealing the electrode section 7
The magnetic detection unit is attached to the rectangular body 9 side
A material 52 is attached, and the magnet 5
Means for detecting the movement of 1 to turn on / off, (F) switch on the movable electrode portion 7a of the seal electrode portion 7
For the rectangular body 9 constituting the housing 8
The micro switch 56 is attached to the
Contact between switch-on projection 57 and microswitch 56
(G) means for detecting the movement of the battery and turning it on / off;
Arrange the bar 63 and the micro switch 66 and extend the lever
ON / OFF by the movement of the contacts of the micro switch 63 and the micro switch 66
Off means, or extend into the storage housing 60.
Instead of arranging long lever 63 and micro switch 66
A micro switch is provided on the bottom of the storage housing 60.
66 is arranged and turned on by the operation of the micro switch 66
/ Means for performing off, the magnet 7 into the storage housing 70 (H) the battery unit 6
1 with an extension lever 73 and a magnetic detection member 72
ON / OFF is performed by the movement of the extension lever 73 with 71
means,

[0006]

FIG. 1 is a schematic view of a high frequency welding apparatus 1 according to the present invention, and FIG. 2 is a block diagram of FIG. High frequency welding equipment 1
Indicates a seal electrode section 7 of a sealed body (tube), a high-frequency oscillation section 2 for generating a high-frequency high voltage, a voltage conversion section 3 (DC / DC, CONV) for boosting the battery voltage, and instructs a high-frequency oscillation. And a storage battery unit 6 for supplying electric power. These members are arranged in a housing 8 that can be carried by an operator with one hand and easy to seal the tube, and are small and lightweight. Have been.

In FIG. 1, a housing 8 is formed in a so-called pistol shape and includes a rectangular body 9 and a hand unit 4. The rectangular body 9 has a high-frequency oscillating unit 2 and a voltage converting unit 3 arranged inside, a seal electrode unit 7 in the front, and a power switch 10 in the rear.

The hand unit 4 has a storage battery unit 6 disposed at the bottom and a trigger unit 5 formed at the front side surface.

The voltage converter 3 is protected by, for example, a protection circuit of the voltage converter by the following means. By arranging the protection fuse 21 between the voltage conversion unit 3 and the storage battery unit 6 as shown in the protection circuit 20 of FIG. 3, the capacity of the fuse 21 can be set to 5 to 6 amps. Also, as shown in the protection circuit 30 of FIG. 4, by arranging the protection fuse 21 outside the voltage conversion unit 3, the capacity of the fuse 21 can be set to 2 amps. Fuse 2
No. 1 has a fusing type and a quick cutting type, but a quick cutting type is more effective and desirable. In FIG. 3, a normal fuse socket cannot be used because a large current flows in a pulse shape. Therefore, for example, as shown in FIG. 5, the lead wires 23 bonded to both ends of the fuse 21 via the cap portion 22 can be directly soldered 24 as a circuit pattern 26 on the printed circuit board 25.

[0010] A protection circuit of a voltage conversion unit which is a feature of the present invention.
As a first means, as shown in a protection circuit 40 in FIG. 6, a DC current detecting element 31 (hereinafter referred to as CT31) is disposed together with the fuse 21 on a wiring between the voltage conversion unit 3 and the storage battery unit 6. Means can be adopted. This means that CT
The output of the detection circuit 32 is received by the detection circuit 32, and a stop signal is sent to the voltage conversion unit 3 when the set overcurrent is detected, whereby the voltage conversion unit 3 and the storage battery unit 6 can be protected. Since the CT 31 employed in this means only passes through the circuit wiring, no electrical inconvenience such as a voltage drop or a contact failure occurs, so that reliable detection can be performed. The stop signal can use both a lock system and a non-lock system, but unlocking is performed by an external reset signal.

The second means comprises a fuse 21 and a DC current detecting element 31 ( detecting circuit 3) as shown in a protection circuit 50 of FIG.
The thyristor 33 (hereinafter, “SCR33”) is arranged between 2 ) . This means is used when the overcurrent is detected.
Is turned on to blow the fuse 21 to protect the voltage conversion unit 3 and the storage battery unit 6. The third means is to connect an overcurrent detection resistor R between the voltage conversion unit 3 and the storage battery unit 6 with the fuse 21 as shown in the protection circuit 60 of FIG.
Both are arranged. A voltage drop caused by a current flowing through the overcurrent detection resistor R is detected by an overcurrent detection circuit,
When an overcurrent is detected, a stop signal is sent to the voltage conversion unit 3 to protect the voltage conversion unit 3 and the storage battery unit 6.

As a fourth means, the protection circuits 20, 3
At least one of a power semiconductor element, a transistor, a field-effect transistor, a gate turn-off thyristor, and the like is provided in 0, 40 , 50 , and 60 , and a protection circuit 70 that protects the voltage conversion unit 3 by on / off control of these elements is provided. be able to.

The power is turned on / off by, for example, the following means. Performs direct on / off by the power switch 10, can be carried out by an on / off for example by the switch SW that is installed between the voltage conversion section 3 and the battery unit 6 as FIG. 3, the present invention Characteristic power supply
ON / OFF is performed by each of the following hand stage, for example. First
As shown in FIG. 9, in the means, an on / off function unit 35 composed of, for example, a transistor, a field effect transistor or the like is provided between the storage battery unit 6 and the voltage conversion unit 3, and the on / off operation is performed by an electric signal. Is what you do. In this means, the on / off function unit 35 also serves as an on / off instruction signal and an overcurrent detection operation.

The second means is such that an on / off signal is added to the IC of the voltage converter 36 as shown in FIG.
The IC of the voltage converter 36 also functions as an on / off instruction signal and an overcurrent detection operation. As a third means, a magnet 41 is mounted on the trigger portion 5 as shown in FIG. 11, and a magnet magnetic detecting member 42 (for example, a hall sensor, a magnetoresistive element) is provided on the hand portion 4 side.
Is attached. When the trigger part 5 is pulled and the magnet 41 attached to the trigger part 5 passes the magnetic detection member 42, the magnetic detection circuit operates as shown in FIG. 12, and the voltage conversion part 3 or the power switch 10 (power transistor, An ON signal is transmitted to a power field effect transistor (FET), a gate turn-off thyristor (GTO), and the like. The ON signal is maintained for the sealing time (1 to 15 seconds). On the other hand, in the operation of returning the trigger section 5 to the original state, when the magnet 41 passes the magnetic detection member 42, the detection circuit operates, and an off signal is sent to the voltage conversion section 3. The OFF signal is held unless the trigger unit 5 is operated again. Further, it is also possible to receive an end signal of the seal by the high-frequency oscillator 2 and send an off signal to the voltage converter 3.

As a fourth means, as shown in FIG. 13, a microswitch 46 is provided in the hand unit 4, and a switch-on projection 47 is mounted on the trigger unit 5. Trigger 5
And pull the micro switch 4 with the switch-on projection 47.
Turn 6 on. The ON signal is obtained by directly detecting the movement of the contacts A and B of the microswitch 46 or through the detection circuit of FIG.
It can be sent to the voltage converter 3 or the power switch 10. The ON signal is maintained for the sealing time (1 to 15 seconds). When the trigger unit 5 is returned to its original state, the detection circuit operates by the operation of the microswitch 46, and the voltage conversion unit 3 or the power switch 1
An off signal is sent to 0. Further, the off signal can be transmitted upon receiving the seal end signal from the high frequency oscillation unit 2.

The fifth means is to mount the magnet 51 on the movable electrode portion 7a of the seal electrode portion 7 as shown in FIG.
On the side, a magnetism detecting member 52 (for example, a Hall sensor, a magnetoresistive element) for detecting the magnetism of the magnet 51 is mounted. After the object to be sealed (tube) is set on the seal electrode portion 7, when the movable electrode portion 7a approaches the fixed electrode portion 7b by operating the trigger portion 5, the magnet 51 also moves at the same time.
A change in the magnetism due to the movement of 1 is detected by the magnetism detecting member 52. In this means, an on / off signal can be sent to the voltage converter 3 or the power switch 10 according to the distance between the magnet 51 and the magnetism detecting member 52. FIG. 11
The same operation as described above can be performed.

As a sixth means, as shown in FIG. 16, a switch-on projection 57 is provided on the movable electrode portion 7a of the seal electrode portion 7, and a micro switch 56 is mounted on the rectangular body 9 side. After the object to be sealed (tube) is set on the seal electrode section 7, the trigger section 5 is pulled to move the movable electrode section 7a to the rectangular body 9 side, and the switch-on projection 57 is brought into contact with the micro switch 56 so as to contact the micro switch 56. The switch 56 is turned on (the following operation is substantially the same as that in FIG. 13 and the detailed description is omitted). A seventh means is to arrange an extension lever 63 and a micro switch 66 in a storage housing 60 of the storage battery unit 6 as shown in FIG. Can be used as a safety signal. For example, when the high-frequency welding device 1 is placed on a desk or a floor, the extension lever 63 is pushed on the desk or the floor, so that the micro switch 6 is not used.
6 is brought into the ON state in a state in which the extension lever 63 is in contact with the extension lever 63 from the desk or floor.
Is released, the extension lever 63 is lowered by its own weight, so that the extension lever 63 is separated from the microswitch 66 and is turned off. Further, in this means, the micro switch 66 can be directly mounted on the bottom surface of the storage housing 60 of the storage battery unit 6 without using the extension lever 63.

Eighth means, as shown in FIG.
An extension lever 73 with a magnet 71 and a magnetic detection member 72 are arranged in a storage housing 70 of the storage battery unit 6, and the operation of the magnetic detection circuit is used as an on / off signal or an operational safety signal. FIG. 19 is a general block diagram of FIGS. 11 to 18 (fourth to ninth means). This means can be combined with other on / off means as a safety function. In FIG. 19, the switch (SW) may not be arranged.

[0019]

According to the first aspect of the present invention, damage due to failure of the high-frequency oscillator and the voltage converter is prevented to a minimum.
Moreover, it is an effective means for preventing consumption of the storage battery unit. Claim 2
According to the described invention, a large-capacity mechanical switch is not required by providing a power switch with a switch function, and at the same time, there is no failure such as a contact failure of the switch. By providing the voltage conversion unit with an electrical on / off function, a protection operation can be performed promptly when an overcurrent occurs. Power semiconductor (power switch, power transistor, power FET,
GTO, IGBT) can be similarly turned off as a protection operation. Conventional protection by a fuse can be more reliably protected by combining with a semiconductor such as SCR. Generation of an on / off signal by operation of the trigger is also an effective means for naturally performing a sealing operation.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a high-frequency welding device.

FIG. 2 is a block diagram of FIG. 1;

FIG. 3 is a protection circuit of a voltage conversion unit.

FIG. 4 is a protection circuit of a voltage conversion unit.

FIG. 5 is a mounting state diagram of the fuse of FIG. 3;

FIG. 6 is a protection circuit of a voltage conversion unit.

FIG. 7 is a protection circuit of a voltage conversion unit.

FIG. 8 is a protection circuit of a voltage conversion unit.

FIG. 9 is a schematic diagram of power on / off means;

FIG. 10 is a schematic diagram of power on / off means;

FIG. 11 is a schematic diagram of power on / off means;

FIG. 12 is a block diagram of FIG. 11;

FIG. 13 is a schematic diagram of power on / off means;

FIG. 14 is a block diagram of FIG.

FIG. 15 is a schematic diagram of power on / off means;

FIG. 16 is a schematic diagram of power on / off means;

FIG. 17 is a schematic diagram of power on / off means;

FIG. 18 is a schematic diagram of power on / off means;

FIG. 19 is a general block diagram of FIGS. 11 to 18;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High frequency welding apparatus 2 High frequency oscillation part 3 Voltage conversion part 4 Hand part 5 Trigger part 6 Storage battery part 7 Seal electrode part 7a Movable electrode part 7b Fixed electrode part 8 Housing 9 Rectangular body 10 Power switch 20, 30, 40, 50, 60 Protection circuit 21 Fuse 22 Cap part 23 Lead wire 24 Solder 25 Printed circuit board 26 Circuit pattern 31 DC current detection element (CT) 32 Detection circuit 33 Thyristor (SCR) 34 Overcurrent detection circuit 35 ON / OFF function part 36 Voltage conversion part 41 , 51, 71 Magnets 42, 52, 72 Magnetic detecting members 46, 56, 66 Micro switches 47, 57 Switch-on projections 60, 70 Storage housing 63, 73 Extension lever for storage battery

Claims (2)

(57) [Claims] 1. A seal electrode portion of a tube7And high frequency oscillation
Department2And a trigger unit that instructs high-frequency oscillation5And power
Battery unit to supply6And each of these members with one hand
A housing that is portable and easy to seal the tube
Ning8High frequency welding equipment installed inside1AndA voltage converter 3 for boosting a battery voltage in the housing 8
And place The voltage conversion unit 3 is connected to the storage battery unit 6, and the voltage conversion unit
3 is connected to the high-frequency oscillator 2 and
Connecting the seal electrode section 7;  At least one selected from the followingSaidVoltage conversion
Department3Protection circuit40, 50, 60, 70Is placed, this
High frequency welding equipment characterized by the following:1.(A) Protection fuse
21 and the DC current detecting element 31
A protection circuit 40 arranged between the storage battery unit 6 and (B) In the protection circuit 40 of (A), the thyristor
33 denotes the protection fuse 21 and the DC current detecting element 3
1, a protection circuit 50 disposed between (C) Voltage conversion of protection fuse 21 and overcurrent detection resistor R
A protection circuit 60 disposed between the unit 3 and the storage battery unit 6; (D) In the protection circuits 40, 50, 60 Power semiconductor
Devices include transistors, field-effect transistors,
At least one of the turn-off thyristors
Protection circuit that controls on / off by these70, 2. A seal electrode portion of a tube.7And high frequency oscillation
Department2And a trigger unit that instructs high-frequency oscillation5And power
Battery unit to supply6And each of these members with one hand
A housing that is portable and easy to seal the tube
Ning8High frequency welding equipment installed inside1AndA voltage converter 3 for boosting a battery voltage in the housing 8
And place The voltage conversion unit 3 is connected to the storage battery unit 6, and the voltage conversion unit
3 is connected to the high-frequency oscillator 2 and
Connecting the seal electrode section 7;  Power on / off at least one of the following selected from
offI doMeans,
Dressing equipment1.(A) The on / off function unit 35 is converted to the voltage
Between the unit 3 and the storage battery unit 6,
Means for turning on / off, (B) Applying an on / off signal to the IC of the voltage conversion unit 36,
The voltage conversion unit 36 is connected to the high-frequency oscillation unit 2 and the storage battery unit.
6 and turned on / off by an on / off signal.
Means to do, (C) A magnet 41 is attached to the trigger portion 5 and the hand
Attach the magnetic detection member 42 to the part 4 side, and
Hand that detects the movement of the magnet 41 and turns it on / off
Dan, (D) A micro switch 46 is mounted in the hand unit 4.
Then, a switch-on projection 47 is attached to the trigger portion 4.
The microswitch 46 and the switch are detected by a detection circuit.
The movement of the contact point of the switch-on projection 47 is detected and turned on / off.
Means to perform (E) The magnet 51 is mounted on the movable electrode portion 7a of the seal electrode portion 7.
The magnetic detection unit is attached to the rectangular body 9 side
A material 52 is attached, and the magnet 5
Means for detecting the movement of 1 and performing on / off; (F) Switch on the movable electrode section 7a of the seal electrode section 7
For the rectangular body 9 constituting the housing 8
The micro switch 56 is attached to the
Contact between switch-on projection 57 and microswitch 56
Means for turning on / off by detecting the movement of (G) The extension part is stored in the storage housing 60 of the storage battery unit 6.
Arrange the bar 63 and the micro switch 66 and extend the lever
ON / OFF by the movement of the contacts of the micro switch 63 and the micro switch 66
Off means, or extend into the storage housing 60.
Instead of arranging long lever 63 and micro switch 66
A micro switch is provided on the bottom of the storage housing 60.
66 is arranged and turned on by the operation of the micro switch 66
Means to turn on / off, (H) The magnet 7 is provided in the storage housing 70 of the storage battery unit 6.
1 with an extension lever 73 and a magnetic detection member 72
ON / OFF is performed by the movement of the extension lever 73 with 71
means,