JPH0751449Y2 - Manual impulse sealer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a manual impulse sealer for heat-welding and adhering a resin sheet or the like.

2. Description of the Related Art FIG. 3 is a circuit diagram of a conventional manual impulse sealer. In FIG. 3, one end of a power plug 1 to which power is supplied is connected via a microswitch (hereinafter referred to as MSW) 2 to one of power terminals of a heating timer 3 and an output terminal of a solid state relay (hereinafter referred to as SSR) 4. One of the output terminals of the SSR4 is connected to one end of the primary winding of the heater transformer 5, and the other end of the primary winding of the heater transformer 5 and the power supply terminal of the heating timer 3 are connected. The other end is connected to the other end of the power plug 1. Heating timer 3
Are connected to the input terminals of SSR4, and the output of the heating timer 3 makes the output terminals of SSR4 electrically conductive.
Further, a heater 6 as a heating means is connected between the secondary windings of the heater transformer 5.

With the above configuration, the operation will be described below. First, the power plug 1 is plugged in. At this time, MSW2 and SSR4
Is not turned on, the heater 6 is not energized. Next, the heating timer 3 sets in advance a heating time sufficient for melting the film of the resin sheet to be sealed. This heating setting time depends on the film thickness,
Usually, it is set to 0.1 to 1.6 seconds. Furthermore, a film for sealing is inserted in the sealing portion provided with the heater 6,
Lower the crimping lever to sandwich the film and apply pressure. In this way, the MSW2 attached so as to turn on when the pressure lever is lowered and the film is sandwiched and pressed is conducted, and the heating timer 3 is supplied with power. As a result, the heating timer 3 operates to output to the input terminal of SSR4 and establish electrical connection between the output terminals of SSR4. Power is supplied to the heater transformer 5 by conduction between the output terminals of the SSR 4, and the heater 6 is energized and heated. After that, when the heating set time elapses, the heating timer 3 times up, the output to the input terminal of SSR4 turns off, the output terminals of SSR4 turn off, and the heater 6
Is stopped and the heating is finished. Further, until the film melted by heating is solidified, the film is kept pressed by the pressure bonding lever for some cooling time. After the elapse of this cooling time, the crimping lever is lifted to take out the solidified film, and the sealing is completed.

However, the above-mentioned conventional configuration has a problem that the cooling time varies depending on the operator's judgment because the crimping lever is raised due to the manual operation, and a good seal cannot be achieved.

On the other hand, when the crimp lever moves automatically, such as the electromagnet type, the sealing is automatically performed with a constant and good cooling time.In the case of this electromagnet type, cooling is performed separately from the heating timer. Since the timer is provided, there is a problem that the configuration becomes complicated and the cost for the manual method is significantly increased.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a manual impulse sealer that can be sealed with a simple structure and always with a constant and good cooling time.

Means for Solving the Problems In order to solve the above problems, a manual impulse sealer of the present invention comprises a heating means for heating and welding a resin sheet, and a starting pulse generation for generating a starting pulse when the resin sheet is heat-welded. Means, a frequency dividing means that is reset by the start pulse and outputs at least two types of frequency division outputs when a clock pulse is input, and power is supplied to the heating means by the activation pulse, and the two types of frequency division outputs The control means for controlling the power supply to the heating means to be stopped by the frequency division output having the shorter cycle and the frequency division output having the longer cycle of the two types of frequency division outputs. The flip-flop that is set at this time and reset by the start-up pulse, and after the heating of the resin sheet is finished for a predetermined time from the output of the flip-flop. Cooling detection means for informing the operator of the end of the cooling time.

With the above configuration, when the resin sheet is heat-welded, the control means supplies power to the heating means by the start-up pulse generated by the start-up pulse generating means to heat-weld the resin sheet, and further output from the frequency dividing means. The control unit stops the electric power supply to the heating unit by the frequency division output having the shorter cycle of the two types of frequency division outputs to finish the heat welding of the resin sheet. When it is done, or when the frequency division output of the longer cycle is made, the cooling detection means informs the operator of the end of the cooling time from the flip-flop output that is set. Therefore, the cooling time does not vary, and the cooling timer is not required in addition to the heating timer, and the frequency dividing means, which is one timer, is used to simplify the structure. The function of the timer and the signal of the end of cooling are enabled, and the resin sheet is always well sealed in a constant cooling time.

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

FIG. 1 is a circuit diagram of a manual impulse sealer showing an embodiment of the present invention. Components having the same effects as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. In FIG. 1, a series circuit of a capacitor 11 and a resistor 12 and a bidirectional thyristor 13 are interposed between the MSW 2 and one end of the primary winding of the heater transformer 5. Both ends of the power plug 1 are connected to the AC input terminal of the rectifier 14 via the MSW2, and the + side of the DC output terminal is connected to one end of the capacitor 15 and the one end of the resistor 16 whose other end is grounded, Also, −
The side is grounded. Further, the other end of the resistor 16 is connected to one end of a capacitor 17 whose other end is grounded and the collector of the transistor 18, and is also connected to the base of the transistor 18 via the resistor 19. The base of the transistor 18 is grounded via the Zener diode 20, and the emitter thereof is connected to the VDD power supply line and also grounded via the resistor 21.

On the other hand, one end of the resistor 22 is connected to one of the input terminals of the NOR gate 25 via the inverters 23 and 24, and the resistor 26 and the variable resistor 27 are connected between the other end of the resistor 22 and the connection point of the inverters 23 and 24. , And the connection point between the other end of the resistor 22 and the variable resistor 27 is connected via a capacitor 28 to a NOR gate 25.
Connected to one of the input terminals of, and further NOR gate 25
The other input terminal of is grounded. This Noah Gate 25
The output terminal of is a frequency division timer IC (Toshiba product number 4020 or 40
40) It is connected to the CL terminal of 29. The clock signal generation circuit is configured as described above, and the clock signal is divided by the timer IC.
Input to the 29 CL pin.

The VDD power supply line is connected to one end of the resistor 30 and the cathode of the diode 31, and the other end of the resistor 30 is connected to both the anode of the diode 31 and the input terminal of the NOR gate 32 and is grounded via the capacitor 33. ing. Noah gate
The output terminal of 32 is connected to the reset terminal of the division timer IC 29 and one of the input terminals of the NOR gates 34 and 35, respectively. The startup pulse generator circuit is configured as described above and VDD
A start pulse is output with a pulse width of a predetermined time from the time when power is supplied from the power line.

Further, the output terminal of the NOR gate 34 is connected to one of the input terminals of the NOR gate 36, and the 11ST terminal of the frequency division timer IC 29 is connected to the other input terminal of the NOR gate 36 and is grounded via the resistor 37. . These noah gate 3
Reference numerals 4 and 36 constitute a flip-flop, and the start pulse c that is the output of the NOR gate 32 becomes a set signal, and the dividing timer
The divided output from the 11ST pin of IC29 is the reset signal. The output terminal of the NOR gate 36 is connected to the other input terminal of the NOR gate 34, the capacitor 38 and the resistor 39 whose other ends are grounded, and is also connected to the base of the transistor 41 via the resistor 40. The collector of the transistor 41 is connected to one of the input terminals of the SSR 42, and the emitter is connected. The other input terminal of this SSR42 has a resistor 4
It is connected via 3 to the collector of the transistor 18. Further, one of the output terminals of the SSR42 is connected to the connection point between the MSW2 and the AC input terminal of the rectifier 14, and the other A of the output terminals of the SSR42 is connected to the gate input terminal of the bidirectional thyristor 13 and the resistor 44 is connected. 1 through heater transformer 5
It is connected to one end of the next winding. As described above, the flip-flop, the transistor 41, the SSR 42 and the bidirectional thyristor 13 constitute the control means, and the starting pulse c from the NOR gate 32 supplies power to the heater 6 and the 11ST terminal of the frequency division timer IC 29. It is configured to control so that the power supply to the heater 6 is stopped by the frequency division output.

Further, the 11ST and 12ST terminals of the division timer IC 29 are connected to the cathodes of the diodes 45 and 46, respectively, and the anodes of the diodes 45 and 46 are both connected to one of the input terminals of the NOR gate 47 and VDD via the resistor 48. It is connected to the power line. The output terminal of NOR gate 47 is NOR gate
The input terminal of the NOR gate 35 is connected to the other input terminal of the NOR gate 35, and the output terminal of the NOR gate 35 is connected to the other input terminal of the NOR gate 47 and is grounded via the resistor 49. These noah gate 4
7 and 35 form a flip-flop, and 1 of the dividing timer IC29
When both the 1ST terminal and the 12ST terminal have outputs, the set signal is supplied from the VDD power supply line, and the activation pulse c from the NOR gate 32 serves as the reset signal. Further, the output terminal of the NOR gate 35 is connected to one end of the capacitor 51 via the inverter 50, and the other end of the capacitor 51 is connected to the resistor 52.
Is connected to the VDD power line through and NOR gate 53
Is connected to one of the input terminals. On the other hand, one end of the resistor 54 is connected to the other input terminal of the NOR gate 53 via the inverters 55 and 56, and the other end of the resistor 54 is connected to the connection point of the inverters 55 and 56 via the resistor 57. Together with this, it is connected to the other input terminal of the NOR gate 53 via the capacitor 58. The output terminal of the NOR gate 53 is grounded via a buzzer 59 as a detecting means.

With the above configuration, the operation will be described below. First, the film is inserted into the seal portion constituted by the heater 6 and the crimping lever is lowered, and the film is sandwiched between the crimping lever and the seal portion and pressed. At this time, MS is linked with the pressure of the film.
W2 turns on. When the MSW2 is turned on, power is supplied to the AC input terminal of the rectifier 14 to be rectified and output from the DC output terminal. This rectified output is smoothed by the capacitors 15 and 17, becomes a constant voltage by the Zener diode 20, and is supplied to the base of the transistor 18. The stabilized DC voltage a shown in FIG. Is supplied to. At this time, the CL signal of the frequency division timer IC 29 is fed to the CL signal of the NOR gate 25 shown in FIG.
Is input, and the start pulse c shown in FIG. 2 (c) from the NOR gate 32 is reset by the NOR gate 32 while the capacitor 33 is charged from the VDD power supply line via the resistor 30 and reaches a constant voltage. It is output to the pin, the frequency division timer IC29 is reset and operates, and the 11ST pin of the frequency division timer IC29 and
Each frequency-divided output of the clock signal b is obtained from the 12ST terminal.

Here, FIG. 2 (d) from the 11ST terminal of the dividing timer IC 29.
The frequency division output d shown in is set so that half of the cycle is the heating time. That is, since the frequency-divided output d is frequency-divided from the clock signal b, the cycle of the frequency-divided output d is also changed by changing the variable resistor 27 of the clock signal generation circuit to change the cycle of the clock signal b. The heating time is set. That is, the activation pulse c from the NOR gate 32 is input to the NOR gate 34 and becomes a set signal of the flip-flop, and the frequency division output d from the 11ST terminal of the frequency division timer IC 29 is input to the NOR gate 36 to be the reset signal of the flip-flop. As a flip-flop output, the NOR gate 36 outputs the heating signal e shown in FIG. 2 (e) to the base of the transistor 41. As a result, the heating signal e
For a high-level heating time e1, the transistor 41 is made conductive to make the input side of the SSR 42 conductive, and as a result, the output side of the SSR 42 is made conductive to supply power to the gate terminal of the bidirectional thyristor 13. As a result, the bidirectional thyristor 13 becomes conductive and the heater 6 is energized via the heater transformer 5 to heat and seal the film for the heating time e1. And the division timer
The divided output d from the 11ST terminal of IC29 rises to reset the flip-flop output, and the transistor 41, SSR42
Further, the bidirectional thyristor 13 is turned off to finish heating the film.

Furthermore, after the film heating is completed, the dividing timer IC29 11ST
At the same time the divided output d from the terminal falls, the divided output f from the 12ST terminal rises. That is, the frequency division output f has a doubled cycle as compared with the frequency division output d, and the frequency division output f becomes high level one cycle after the frequency rise output d rises. Here, the activation pulse c from the NOR gate 32 is input and reset as the reset signal of the flip-flop composed of the NOR gates 47 and 35, and the frequency division output d from the 11ST terminal and the 12ST terminal of the frequency division timer IC 29. , F are high level diodes
45 and 46 are turned off, and the cooling signal g shown in FIG. 2 (g) is input from the VDD power supply line via the resistor 48 as the set signal of this flip-flop. The cooling signal g from the VDD power supply line rises just after one cycle of the frequency division output d after the falling of the heating signal e, and the heating time e1 is a half cycle of the frequency division output d. Therefore, the cooling time f1 is the heating time e1. This is the best time for cooling.

Then, the flip-flop output that is set and output at the same time as the rising of the cooling signal g shown in FIG. 2 (g) is inverted by the inverter 50 and becomes low level, and the capacitor 51 is charged with a certain time constant from the VDD power line. As a result, as shown in FIG. 2 (h), the cooling detection signal h, which is the input signal of the NOR gate 53, which becomes the high level again after the constant time h1, is obtained. On the other hand, a clock signal having a constant frequency is input to the other input terminal of the NOR gate 53, and a signal is output from the output terminal of the NOR gate 53 at the frequency of the clock signal during the charging time h1 of the capacitor 51 and the buzzer 59 is output. To pronounce.

By the sound of the buzzer 59, the operator knows that the cooling time f1 is over, and raises the crimping lever to take out the film which has been hardened well and is sealed, and the sealing is completed.

In this way, since the cooling time f1 is required to be twice as long as the heating time e1, it is possible to signal the heating timer function and the end of cooling with one timer circuit by using a frequency divider. Without providing two cooling timers, it is possible to achieve good sealing with a constant cooling time with a simple structure.

Effects of the Invention As described above, according to the present invention, the function of the heating timer and the end of cooling can be signaled by using one frequency dividing means, and good sealing is always achieved with a constant cooling time with a simple structure. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a manual impulse sealer showing an embodiment of the present invention, FIGS. 2 (a) to 2 (h) are time charts showing signal waveforms in respective main parts of FIG. 1, and FIG. It is a circuit diagram of the conventional manual impulse sealer. 2 ... MSW, 6 ... Heater, 13 ... Bidirectional thyristor, 14 ... Rectifier, 18, 41 ... Transistor, 25, 32,
34, 35, 36, 47, 53 …… Noagate, 29 …… Division timer
IC, 30, 52 ... Resistor, 33, 51 ... Capacitor, 42 ... SS
R, 45,46 …… Diode, 50 …… Inverter, 59 …… Buzzer.

Claims (1)

[Scope of utility model registration request] 1. A heating means for heating and welding a resin sheet, a starting pulse generating means for generating a starting pulse when the resin sheet is heated and welded, and at least 2 when reset by the starting pulse and a clock pulse is input. Electric power is supplied to the heating means by the frequency dividing means for outputting a frequency-divided output of the kind, and electric power is supplied to the heating means by the frequency-divided output of the shorter one of the two kinds of frequency-divided outputs. And a flip-flop that is set when at least one of the two types of frequency-divided outputs, which has a longer cycle, is reset and reset by the activation pulse, and the flip-flop. Manual impal equipped with cooling detection means for notifying the operator of the end of the cooling time after the heating of the resin sheet has been completed for a predetermined time Sheila.