JPH10278908A - Electrically heating-type fixing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency in joining an object to be fixed, maintain quality and simplify unsealing by a method wherein a body case or a movable case includes a heating part for heat-welding the object and an operation switch for closing by pushdown of the movable case and power is supplied to the heating part by closing of the operation switch. SOLUTION: An opening of a packing member is mounted on a body case 1 while being positioned by a work stopper 19, a movable case 2 is pushed down against a return spring 4, and the opening of the packing member is held by the body case 1 and the movable case 2, whereby an operation switch 13 is pushed down by a switch pushdown piece 22 to be turned on. When the operation switch 13 is turned on, a timer circuit is driven on for a time set by a heat time setting controller 17, and a lower heater 14 and an upper heater 21 are heated with voltage set by a heat voltage setting controller 18. Thus the opening of the packing member made of synthetic resin is melted by heat to be joined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrothermal fixing device for partially closing and joining an opening of a synthetic resin container or a packaging bag by heat, and more particularly to a small, portable, hand-held type. The present invention relates to an electrothermal fixing device.

[0002]

2. Description of the Related Art In recent years, box-shaped containers and packaging bags made of synthetic resin such as polyethylene have been widely used as packing members. Among them, a container with a lid formed by integrally connecting a box-shaped main body and its lid is also commercially available.

In the case where an object to be packed is placed in such a container, and the lid is closed and fixed to the container main body, conventionally, a rubber band is applied from the outside to prevent the lid from being lifted from the container main body, The opening between the main body and the lid was joined with an adhesive tape, or joined with a "U" -shaped stapler using a stapler. In addition, when an object to be packed is put in a packaging bag and the opening is closed, the joining is performed using an adhesive tape or a stapler using a stapler.

[0004]

However, in a production line for packaging a product using such a synthetic resin packaging member, the work efficiency is poor when joining with an adhesive tape. Many joining methods are used.

However, in the method using the stapler, when removing the stapler in order to open the packaging member, there has been an inconvenience such as that the tip of the needle sticks into the unsealer's finger and is injured. In addition, stapling needles are mistakenly mixed into the package to degrade the quality of the packaged product, mixed into the transport line to stop the line, and when cleaning the packaged product, suction it into the cleaning pipe. Inconveniences such as clogging of pipes have occurred.

Further, as a device for closing and joining the opening, a device using ultrasonic welding or vibration welding has been proposed. However, since it is a device for accommodating the container itself, it is inevitable that the size of the container is increased and the device is excellent in portability. It is not suitable as a manually portable fixing device.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and has a high joining work efficiency without deteriorating the quality of an object to be packaged, and also allows easy opening work at a joined portion. It is an object of the present invention to provide a compact and portable electrothermal fixing device.

[0008]

According to a first aspect of the present invention, there is provided a main body case, and a movable case rotatably coupled to the main body case and holding an object to be fixed together with the main body case. The case or the movable case includes an electric heating portion for welding the adhered object and an operation switch closed by pressing the movable case, and is configured to supply power to the electric heating portion by closing the operation switch.

According to the present invention, when the opening of the adhered object is sandwiched between the main body case and the movable case, the operation switch is closed, whereby power is supplied to the electric heating section. Is separated from the main body case, the opening of the object can be partially welded and joined.

According to a second aspect of the present invention, there is provided a main body case, and a movable case rotatably coupled to the main body case and holding an object to be fixed together with the main body case. An electric heating unit for welding the adhered substance, an operation switch that closes by pressing the movable case, a timer circuit that supplies power to the electric heating unit for a certain period of time by closing the operation switch, and a notification unit that notifies the certain period of time. Is provided.

According to the present invention, when the opening of the adhered object is sandwiched between the main body case and the movable case, the operation switch is closed, whereby the timer circuit is activated and power is supplied to the electric heating section for a certain period of time. If the fixed time is set to an appropriate time, the notification unit notifies the fixed time, so that the movable case is separated from the main body case based on this notification, so that the opening can be partially welded and joined. it can.

The third aspect of the present invention is the first aspect of the present invention.
Alternatively, in the invention described in 2 above, a voltage setting unit for adjusting a voltage value supplied to the electric heating unit is provided.

According to the present invention, the voltage value to be supplied to the electric heating portion can be adjusted in accordance with the material and thickness of the adhered object, so that the most suitable electric power for welding the adhered object can be supplied. can do.

[0014] The invention described in claim 4 of the present invention is claim 1.
Alternatively, in the invention according to the second aspect, a time setting unit that variably sets a time for supplying power to the electric heating unit by adjusting the timer circuit is provided.

According to the present invention, the time for supplying electric power to the electric heating portion can be adjusted in accordance with the material and thickness of the adhered object, so that the optimal bonding time for welding the adhered object to be joined can be adjusted. Can be set.

The invention according to claim 5 of the present invention is the invention according to claim 1.
In the invention described in the second aspect, the electric heating portion is provided at a position facing the main case and the movable case, respectively.

According to the present invention, since the electric heating section is provided on both the main body case and the movable case, the opening of the object can be heated and welded from both sides, and the joining time can be shortened. .

[0018]

FIG. 1 is an external perspective view showing an embodiment of an electrothermal fixing device according to the present invention, and FIG. 2 is a schematic side sectional view partially cut away. The electrothermal fixing device according to the present embodiment includes a main body case 1 formed in a prismatic shape, and a movable case 2 rotatably coupled to a rear end of the main body case 1.

The movable case 2 is rotatably connected to the main body case 1 by a connecting pin 3 at a rear end portion. In a steady state, the front end portion returns to the connecting portion so as to be stationary at a position slightly away from the main body case 1. 4 are incorporated. For this reason,
After the movable case 2 has been pressed against the return spring 4 against the main body case 1 and the pressing force is released, the resilient force of the return spring 4 causes the distal end of the movable case 2 to move slightly away from the main case 1. It is configured to return to a position.

The main body case 1 is formed by a substantially U-shaped metal housing 1a, and the outer peripheral portion is covered by a resin molded case 1b. Metal housing 1
A printed circuit board (PCB) 11 is mounted inside a, and a plug socket 12 and an operation switch 13 are mounted adjacent to the rear of the PCB 11 in the lateral direction.

A lower heater 14 as an electric heating unit and a light emitting diode (L
ED) 15, 16; a heat time setting operator 17 as a time setting unit; and a heat voltage setting operator 18 as a voltage setting unit.

The plug socket 12 is a coupling member attached to the rear end face of the main body case 1 with the insertion opening facing, and is connected to the converter 6 by a plug 5 inserted from outside. Converter 6 is plugged into an AC 100V outlet and converts AC power to DC power.
Built-in C-DC converter.

A work stopper 19 is provided on the upper surface of the main body case 1. This work stopper 1
Reference numeral 9 denotes an opening for positioning the opening of the packing member as an object to be thermally welded, and is attached so as to be slidable in the front-rear direction along a slide hole 1c formed in the upper surface of the main body case 1. ing.

The movable case 2 is formed by a substantially U-shaped metal housing 2a, and the outer peripheral portion is covered by a resin mold case 2b. Metal housing 2
Inside a, an upper heater 21 as an electric heating unit is attached at a position facing the lower heater 14, and a switch pressing piece 22 is attached at a position facing the operation switch 13.

(Mounting Structure of Lower Heater) Next, the details of the mounting structure of each part will be described. 3A and 3B are configuration diagrams showing a mounting structure of the lower heater 14 mounted on the main body case 1, and FIG.
(B) is an exploded view of a mounting portion.

The lower heater 14 is formed so that its central portion is flush with the upper surface of the main body case 1, and both side portions are bent downward so that the leg portions 14a are connected to the metal housing 1a.
It is a structure to be mounted on.

On the leg 14a of the lower heater 14, P
The CB 11 is placed on which the holding plate 1d is placed. The holding plate 1d, the PCB 11, and the legs 14a are fixed to the metal housing 1a by set screws 7a.

An electrode 11e is formed on the lower surface of the PCB 11, and an electrode 14e is formed on the upper surface of the leg 14a. At the time of fixing, the two electrodes 11 e and 14 e are in contact with each other, and power is supplied from the PCB 11 to the lower heater 14.

(Mounting Structure of Upper Heater) FIG. 4 is a configuration diagram showing a mounting structure of the upper heater 21 mounted on the movable case 2, (a) is a cross-sectional view taken along line BB of FIG. b) is an exploded view of the mounting part. The upper heater 21 is disposed in a state in which a central portion thereof is in contact with a silicon rubber 2c inserted into a bent portion of the metal housing 2a constituting the movable case 2, and the central portion is flush with the lower surface of the movable case 2. It is formed so that it becomes.

Both sides of the upper heater 21 are bent upward, and their legs 21a are fixed to bent portions of the metal housing 2a. Also, the legs 21 of the upper heater 21
A printed circuit board 23 is arranged below a, and a holding plate 2d is further arranged below the printed circuit board 23. The holding plate 2d, the printed circuit board 23, and the leg 21a are fixed to the bent portion of the metal housing 2a by the set screw 7b.

The electrode 2 is provided on the upper surface of the printed circuit board 23.
3e are formed, and an electrode 21e is formed on the lower surface of the leg 21a. When fixed, these two electrodes 23e, 2
1e are connected to each other so that power is supplied from the printed circuit board 23 to the upper heater 21.

(PCB Mounting Structure) FIG.
2A is a perspective view showing a relationship with a main body case 1, and FIG. 2B is an enlarged view of a substrate holding piece. The PCB 11 has a structure in which a plurality of board holding pieces 1e are formed by cutting and raising the side surface of the metal housing 1a of the main body case 1, and the PCB 11 is slid and inserted from the front and held by the board holding pieces 1e.

(Mounting Structure of Plug Socket, etc.) FIG.
FIGS. 2A and 2B are configuration diagrams illustrating a mounting structure of a plug socket 12 and an operation switch 13, where FIG. 2A is a perspective view illustrating a relationship with a main body case 1, FIG. 2B is a plan view thereof, and FIG. is there.

The operation switch 13 is mounted by performing burring on the metal housing 1a of the main body case 1 to provide a projection 1f at the position of the mounting hole of the operation switch 13,
Further, a switch support piece 1g is formed by cutting and raising, and the operation switch 13 is set thereon.

Then, the plug socket 12 is inserted into the side stopper 1h formed by cutting and raising the metal housing 1a.
It has a role also as a holding plate of the operation switch 13. Further, a lateral holding piece 1i for holding the operation switch 13 and the plug socket 12 is formed, and holds the operation switch 13 and the plug socket 12.

A socket support piece 1j serving as a support is formed below the plug socket 12, and the upper presser piece 1k processed so as to be bent with a tool such as pliers after the plug socket 12 is attached so as not to come off. suppress.

(LED Mounting Structure) FIG.
FIG. 3A is a configuration diagram showing an attachment structure of FIG.
FIG. 3B is a perspective view showing a relationship between the LED 15 and B11, and FIG. In addition, LED
Since the mounting structure of the LED 16 is the same, only the LED 15 is shown as a representative.

The LED 15 is directly connected to the PCB 11 and mounted by bending a lead wire 15a at a right angle to form a lens 15b mounted in a hole formed in the metal housing 1a and the outer molded case 1b constituting the main body case 1.
Is configured to emit light from the outside. Lens 1
5b is a metal housing 1a and an outer mold case 1
It is fixed between b.

(Attaching Structure of Setting Operator) FIG. 8 is a configuration diagram showing an attaching structure of the heating time setting operator 17 and the heating voltage setting operator 18 of the variable resistor configuration.
Sectional drawing which shows the relationship between CB11 and main body case 1,
(B) is a side view.

The two operators 17 and 18 are directly connected to the PCB 11 and are bent. The lead wires 17a and 18a are bent at a right angle, and the metal housing 1a which forms the main body case 1 so that the user can operate it with a fingertip. The rotor is attached so that a part of the rotor is exposed from a hole formed in the outer mold case 1b. In the display, the heat time setting operator 17 is “long” / “short”, and the heating voltage setting operator 18 is “high” / “low”.

(Attachment Structure of Work Stopper) FIGS. 9A and 9B are configuration diagrams showing an attachment structure of the work stopper 19, wherein FIG. 9A is a perspective view showing the relationship with the main body case 1, and FIG. 9B is a side sectional view. . The work stopper 19 includes an operator 19a and a spring plate 19b. A U-shaped projection 19d of the spring plate 19b is inserted into a hole 19c provided inside the operator 19a from the back side of the main body case 1 through a slide hole 1c.
The projection 19d is fixed from the side of the operation element 19a by a set screw 19e.

Accordingly, the operating element 19a and the spring plate 19
b is attached so as to sandwich the main body case 1, and since the flat plate portion of the spring plate 19b has a larger area than the opening surface of the slide hole 1c, and is formed in a waveform and has elasticity. The operator 19a slides in the front-rear direction along the slide hole 1c so as to sandwich the main body case 1 together with the spring plate 19b.

(Mounting Structure of Return Spring) FIGS. 10A and 10B are configuration diagrams showing the mounting structure of the return spring 4, and FIG.
FIG. 3B is an exploded view showing a connection relationship between the main body case 1 and the movable case 2. The return spring 4 is formed in the shape of a leaf spring whose tip is bent downward from the central portion 4 a, and its distal end portion 4 b is formed in a curved shape so as to slide on the upper surface of the main body case 1.

Further, a cylindrical fulcrum hole 4c is formed at the rear end, and the fulcrum hole 1q of the rising piece 1p and the metal housing 2a formed at the rear end of the metal housing 1a.
It is structured to be rotatably attached to a fulcrum hole 2q of a falling piece 2p formed at the rear end portion of the lower end via a connecting pin 3 (not shown).

When the movable case 2 is pushed down, the return spring 4
The center part 4a extends and the tip part 4b slides forward on the main body case 1. When the force holding down the movable case 2 is released, the movable case 2 returns upward by the restoring force of the return spring 4. The upward rotation of the return spring 4 is restricted by a projection 1r provided inside the rising piece 1p of the metal housing 1a.

(Another Example of Heater Mounting Structure) FIGS. 11 and 12 show a lower heater 14 and an upper heater 21.
FIG. 10 is a configuration diagram showing another mounting structure. In the above-described mounting structure (FIGS. 3 and 4), the silicon rubber is mounted on the upper heater 21, but in the present embodiment, the silicon rubber is mounted on the lower heater 14.

That is, in FIG. 11, the lower heater 14 has a structure in which the silicon rubber 1s is inserted and held in the bent portion of the metal housing 1a constituting the main body case 1, and the heater 14 is mounted on the silicon rubber 1s. .

The lower heater 14 is formed such that the central portion mounted on the silicone rubber 1s is flush with the upper surface of the main body case 1, and both sides are bent downward, and its leg 14a is It is placed on the bent portion of the metal housing 1a.

The PCB 11 is placed on the leg 14a of the lower heater 14, and the holding plate 1 is further placed thereon.
d is placed. The holding plate 1d and the PCB 11 are notched at the center so that the center of the heater 14 is exposed to the outside, and the ends are mounted on the legs 14a of the heater 14.

The holding plate 1d, the PCB 11, and the leg portion 14a of the lower heater 14 are fixed to the bent portion of the metal housing 1a by a set screw 7a. In addition, PCB11
Electrodes 11e and 14a are formed on the lower surface of the lower heater 14 and the upper surface of the legs 14a of the lower heater 14, respectively. Power is supplied from the PCB 11 to the lower heater 14 via the electrodes 11e and 14e.

In FIG. 12, the upper heater 21
Is formed so as to be flush with the lower surface of the movable case 2, the both sides thereof are bent upward, and the legs 21a are fixed to the metal housing 2a.

A printed circuit board 23 is disposed on the lower surface of the leg 21a of the upper heater 21, and a pressing plate 2d is disposed on the lower surface. Holding plate 2d, printed circuit board 2
3 and the leg 21a of the upper heater 21 are set screws 7b
To the metal housing 2a. Also,
Electrodes 23e and 21e are formed on the upper surface of the printed circuit board 23 and the lower surface of the legs 21a of the upper heater 21, respectively. Power is supplied from the printed circuit board 23 to the upper heater 21 via the electrodes 23e and 21e. .

(Circuit Configuration) FIG. 13 is a circuit diagram showing an embodiment of the electrothermal fixing device according to the present invention. In the figure, one end of a plug socket 12 connected to a plug 5 is connected to a heat voltage setting operator 18 made of a variable resistor.
And one end of the lower heater 14 and one end of the upper heater 21 connected in parallel via the diode D1, one end of the LED 15 that is lit during heating, one end of the heat time setting operator 17, the power supply terminal of the timer circuit IC, and the like. One end is connected to the operation switch 13, respectively. The other end of the plug socket 12 is grounded.

Lower heater 14 and upper heater 21
Are connected in parallel or in series. In this example, in order to increase heat generation even with a small current, the resistance value is reduced by connecting in parallel, but may be connected in series. Both heaters 14,2
The other end of 1 is grounded via a transistor Q1,
The other end of the LED 15 is also grounded via the transistor Q1.

The variable resistor R2 constituting the heat time setting operator 17 sets the ON time of the transistor Q1 and the ON time of the LED 16 together with the timer circuit IC and its external resistors R3 to R5 and the capacitors C1 to C3. I do.

(Operation) In this configuration, the plug 5 is inserted into the plug socket 12 and the converter 6 is connected to the AC1.
When plugged into a 00V outlet, the electrothermal fastening device is ready for operation. In this state, the packing member is placed on the main body case 1 while positioning the opening of the packing member with the work stopper 19, and the movable case 2 is pushed down against the return spring 4.
When the opening of the packing member is sandwiched between the main case 1 and the movable case 2, the operation switch 13 is pressed by the switch pressing piece 22 to be turned on.

When the operation switch 13 is turned on, the timer circuit IC sets the transistor Q1 to the heating time setting operator 1
It is turned on for the time set in step 7. As a result, when the transistor Q1 turns on, the heat voltage setting operator 18
The lower heater 14 and the upper heater 21 are heated by the voltage set in the above, and the LED 15 is turned on at the same time.

Thus, the opening of the synthetic resin packaging member is melted by heat and joined. When the set time has elapsed, the timer circuit IC turns off the transistor TR and stops supplying power to the lower heater 14 and the upper heater 21. At the same time, the LED 15 turns off.

Next, the timer circuit IC drives the LED 16 to light up for a certain period of time. This is a period during which the lower heater 14 and the upper heater 21 are cooled, and is set to ensure the safety of the worker. After a certain period of time, the timer circuit IC turns off the LED 16, so that the operator confirms that the two LEDs 15 and 16 are turned off and releases the pressing of the movable case 2. As a result, the opening of the synthetic resin packaging member can be partially welded.

The heating time can be set by the heating time setting operation element 17 and the heating power can be set by the heating voltage setting operation element 18. Therefore, the heating time can be adjusted according to the material and thickness of the packing member. What should I do?

Also, if one welding point is not enough,
By welding a plurality of locations, the joining strength of the opening can be increased. At the time of opening the packing member, the area of each welding point is spot-like and small, so that the packing member can be easily separated and opened.

In the above-described embodiment, the heater is provided on both the main body case and the movable case.
You may make it provide only in a main body case. In this case, it is necessary to provide a heat-resistant portion at a position facing the movable case.

[0063]

According to the present invention, the opening of the synthetic resin packaging member can be partially welded and sealed by simply sandwiching the opening between the main body case and the movable case. The efficiency is high, and the area of the joint is small, so that the opening operation is simple. Further, since a stapler is not used as in the related art, there is no inconvenience that the stapler enters the object to be packed and deteriorates the quality of the object to be packed.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an embodiment of an electrothermal fixing device according to the present invention.

FIG. 2 is a schematic side sectional view showing a part of FIG.

FIG. 3 is a configuration diagram showing a mounting structure of a lower heater.

FIG. 4 is a configuration diagram showing a mounting structure of an upper heater.

FIG. 5 is a configuration diagram showing a mounting structure of a printed circuit board.

FIG. 6 is a configuration diagram showing a mounting structure of a plug socket and an operation switch.

FIG. 7 is a configuration diagram showing a mounting structure of a light emitting diode.

FIG. 8 is a configuration diagram showing a mounting structure of a heat time setting operator and a heat voltage setting operator.

FIG. 9 is a configuration diagram showing a mounting structure of a work stopper.

FIG. 10 is a configuration diagram showing a mounting structure of a return spring.

FIG. 11 is a configuration diagram showing another mounting structure of the lower heater.

FIG. 12 is a configuration diagram showing another mounting structure of the upper heater.

FIG. 13 is a circuit configuration diagram showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Movable case 3 Connecting pin 4 Return spring 5 Plug 6 Converter 11 Printed circuit board (PCB) 12 Plug socket 13 Operation switch 14 Lower heater 15, 16 Light emitting diode (LED) 17 Heating time setting operator 18 Heat voltage setting operation Child 19 Work stopper 21 Upper heater 22 Switch pressing piece 23 Printed circuit board IC Timer circuit

Claims (5)

[Claims] 1. A body case, and a movable case rotatably coupled to the body case and holding an object to be fixed together with the body case, wherein the body case or the movable case welds the object to be fixed. An electrothermal fixing device, comprising: an electric heating unit to be closed; and an operation switch that is closed by pressing the movable case, and supplies power to the electric heating unit by closing the operation switch. 2. A body case, and a movable case rotatably coupled to the body case and holding the object together with the body case, wherein the body case or the movable case welds the object to be fixed. An electric heating unit, an operation switch that is closed by pressing the movable case, and a timer circuit that supplies power to the electric heating unit for a certain time by closing the operation switch;
An informing section for informing the predetermined time period. 3. The electrothermal fixing device according to claim 1, further comprising a voltage setting unit for adjusting a voltage value supplied to the electric heating unit. 4. The electrothermal fixing device according to claim 1, further comprising a time setting unit that variably sets a time for supplying power to the electric heating unit by adjusting the timer circuit. 5. The electrothermal fixing device according to claim 1, wherein the electric heating unit is provided at a position of the main case and the movable case facing each other.