JPS6326007B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vacuum packing device that can easily vacuum pack fresh foods and the like into thermoplastic resin bags.

[Prior Art] Conventionally, as shown in Japanese Unexamined Patent Publication No. 53-2183, the opening of a thermoplastic resin bag is clamped and closed between two press stands, at least one of which is configured as a heating device, and the opening of a thermoplastic resin bag is heated. A device is known in which the air inside the resin bag is evacuated using an air suction pump during welding. This apparatus is provided with a switch for the air suction pump which is switched to the closed position when the angular swinging arm supporting one press table is moved to the welding position. As a result, the opening of the thermoplastic resin bag is sandwiched between the two press tables, the switch is closed and the air suction pump is operated, and the air inside the bag is exhausted and the heating device is operated, thereby increasing the temperature of the bag. The opening is heat welded.

[Problems to be Solved by the Invention] However, in the conventional apparatus, the two press tables do not necessarily tightly sandwich the opening of the bag during heat welding. Due to the nature of plastic resin bags, whether the opening of the bag is strongly pinched or not, it will be welded when subjected to heat action, so the bag opening will be welded by heat if the airtightness is insufficient. There were some problems.

[Means for Solving the Problems] The present invention includes an electric blower, an intake nozzle that sucks out air in a thermoplastic resin bag connected to the blower and covered on the outer periphery, and a It is carried out in a vacuum packing device equipped with a sealing mechanism that clamps and closes the opening of the resin bag and heat-welds the opening, and the sealing mechanism is connected to and separated from a heater, a heating plate to which the heater is attached, and a heating plate. The press body is attached to the front side of a rotatably provided opening/closing lid. Then, a temporary stopper is attached to the substrate side to which the heating plate is attached. This stopper temporarily stops the closing operation of the opening/closing lid at a position where the pressing body approaches the heating plate, and the position of the upper end where the opening/closing door comes into contact is lower than the height position in the temporarily secured state. The opening/closing door is configured to have a function of allowing further closing operation of the opening/closing door which presses the pressing body against the heating body by downward displacement. moreover,
A switch is attached to the substrate side, which is pressed by the opening/closing lid and is in series with the heater. Moreover, this switch has a normally open type that maintains the open state in the open state and the temporarily fixed state, and is closed by being pressed by the opening/closing lid while the pressing body is pressed against the heating plate. By using a switch, the above-mentioned conventional problems are solved.

[Operation] With the opening/closing lid open, after covering the opening of the thermoplastic resin bag containing fresh food over the intake nozzle,
When the opening/closing lid is closed, the lid comes into contact with the temporary stopper and the pressing body is temporarily secured in a position close to the heating plate, and at the same time, the switch, which is always maintained in the open state by this temporary securing, closes the opening/closing lid. to prevent it from being completely pressed and closed. In this temporarily fixed state, the opening of the resin bag is pinched by the heating plate and the pressing member approaching the heating plate, and in this state, the electric blower is operated to suck out the air inside the resin bag. After this, the opening/closing member is continuously pressed strongly against the substrate side. As a result, the opening/closing lid is pushed down while the upper end of the temporary stopper is displaced downward, so that the pressing body attached to the lid presses the opening of the resin bag more strongly against the heating plate. , improve the tightness of the opening. At the same time, the lid sufficiently presses the switch due to the opening/closing pressing displacement accompanied by the displacement of the temporary stopper as described above, and the switch is closed from the open state. For this reason, the heater of the sealing mechanism generates heat, so the opening of the resin bag is sealed by heat welding, and the fresh food is vacuum packed.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Figure 1 shows the external appearance of the vacuum packing device.
The upper surface of the base 1 is covered by a main body cover 2 and an opening/closing lid 3, and a power supply cord 5 to which a plug 4 is attached is led out from the joint between the base 1 and the main body cover 2. There is a handle 6 on the top of the main body cover 2 for carrying.
A power switch 7 and a pilot lamp 8 are installed. The opening/closing lid 3 consists of an upper plate part 3a and a thick front plate part 3b, and a transparent plate (for example, a glass plate) 9 is fitted into the center of the upper plate part 3a, and the upper end of the front plate part 3b is fitted with a transparent plate (for example, a glass plate) 9. The opening/closing operation knob 10 is fixed,
Further, a cutter operating knob 11 is attached to the front edge of the upper plate portion 3a so as to be slidable left and right along a guide groove 12.

FIG. 2 shows the internal structure of the vacuum packing device. A board 13 is fixed to the upper end of the base 1 by means such as screws, and an electric blower 14 is installed between the board 13 and the main body cover 2. Vibration isolation members 15a, 15b
It is installed through. The blower 14 is installed with its intake port facing forward, and an intake nozzle 16 is connected to the intake port. This intake nozzle 16 has a distal end intake port 17 formed into a wide flat shape that extends diagonally downward, and has a flange 18 on the outer periphery of the base end, which is formed using a soft elastic material. Besieged at 19. The elastic member 19 maintains airtightness between the intake nozzle 16 and the intake port of the blower 14, and the flange portion 18 is elastically held between the base plate 13 and the main body cover 2 via the elastic member 19. has been done. Therefore, the intake nozzle 16 is the same member 1.
The air intake port 17 can be rotated up and down by utilizing the elasticity of the air inlet 9, but when pressed from above by the leaf spring 20, it comes into close contact with the substrate 13 as shown in FIG. The leaf spring 20 is connected to the base plate 1 as shown in FIG.
One end is rotatably supported by the upper end of a support shaft 21 installed on the support shaft 3, which rotates in the direction of arrow A to hold down the intake nozzle 16 from above, and rotates in the direction of arrow B to hold down the intake nozzle 16 from above. It is adapted to come off from the nozzle 16. Note that 20' in FIG. 2 shows a state in which the leaf spring 20 is removed from the nozzle 16.

The opening/closing lid 3 has one end of each arcuate arm 22 fixed to the left and right inner surfaces of the end edge of the upper plate portion 3a, and the other end of each arm 22 is rotated by a shaft 23 to the left and right inner surfaces of the front edge of the main body cover 2. It is movably attached and can be rotated upward. Note that 3' in FIG. 2 indicates a state in which the opening/closing lid 3 is opened upward. The guide groove 12 is formed in the front plate portion 3b of the opening/closing lid 3 so as to pass through between the upper and lower surfaces and extend in the left-right direction (in FIG. 2, the direction perpendicular to the plane of the paper). An elevating shaft 25 having a cutter 24 fixed to its lower end and the cutter operating knob 11 fixed to its upper end is mounted on the guide groove 12 so as to be movable up and down and slidable left and right. This elevating shaft 25 is always urged upward by a spring 26.
When the knob 11 is pushed down against the spring 26, the cutter 24 protrudes from the lower surface of the front plate portion 3b. Further, in the front plate part 3b, a holding groove 27 parallel to the guide groove 12 is provided at a position on the front side of the guide groove 12 and opened on the lower surface of the front plate part 3b. An elastic tube of an appropriate length shown by the imaginary line is flattened and press-fitted, and slightly protrudes from the lower surface of the front plate portion 3b, thereby forming a pressing body 28.

On the other hand, a slit 29 is formed in the substrate 13 at a position below the guide groove 12. Further, a heating plate 30 made of glass wool is fitted into the surface of the substrate 13 at a position below the pressing body 28, and a sealing mechanism 31 is formed on the lower surface of the heating plate 30 together with the pressing body 28 and the heating plate 30. A sheathed heater 32 is attached in close contact. Furthermore, base 1
A normally open micro switch 33 is fixed to the upper surface of the switch 1, as shown in FIG. 5 (cross-sectional view taken along the line A-A in FIG. 2). The upper surface of this switch 33 is aligned with the upper surface of the base plate 13, and the operation button 33a is projected from the upper surface and is opposed to the lower surface of the front plate portion 3b of the opening/closing lid 3. Further, a temporary stopper 34 whose upper surface position can be raised and lowered at least on the base 1 is attached to the base 1 so that the upper end thereof is attached to the substrate 1.
It protrudes from the upper surface of the front plate portion 3b and faces the lower surface of the front plate portion 3b. In this embodiment, this stopper 34 is always urged upward by a spring 35, and supports the opening/closing lid 3 from below as shown by the imaginary line in FIG. The micro switch 33 is prevented from closing on the lower surface of the lid 3b, but when the opening/closing control knob 10 of the lid 3 is pushed down by hand, it descends against the spring 34 as shown by the solid line in the same figure, and the front plate Closing operation of the micro switch 33 by the lower surface of the portion 3b is allowed.

The motor of the electric blower 14 is connected to a power source via a power switch 7 and further via the power supply cord 5 and plug 4 as shown in FIG.
A series circuit including a sheathed heater 32 and a micro switch 33 is connected in parallel to the motor between the terminals of the motor.

In FIG. 2, 36 is an exhaust port provided on the rear plate of the main body cover 2, and 37 is a filter that closes this exhaust port 36 from the inside.

Next, the usage and operation of this vacuum packing device will be explained. For example, fresh foods such as fruits and vegetables3
8 in a thermoplastic resin bag 39, first open the opening/closing lid 3 to the position shown by the imaginary line in FIG.
Remove it from the nozzle 16, and while lifting the intake port 17 of the nozzle 16, cover the opening of the resin bag 39 containing the fresh food 38 around the nozzle 16, leaving the part containing the food 38 hanging in front of the base 1. . When the nozzle 16 is pressed by the leaf spring 20, the resin bag 39 is sandwiched between the inlet port 17 of the nozzle 16 and the substrate 13 and held at a fixed position. When the opening/closing lid 3 is lowered to the position where it hits the temporary stopper 34 (the position shown by the imaginary line in FIG. 5), the pressing body 28 approaches the heating plate 30 and the opening of the resin bag 39 is narrowed. 33 is still held open. Next, when the power switch 7 is turned on, the electric blower 14 is activated, and an airflow is generated which is sucked in through the intake port 16 of the intake nozzle 16, passes through the inside of the blower 14, and flows out from the exhaust port 36.
The air inside the resin bag 39 is sucked out and the bag 39 comes into close contact with the outer surface of the food 38. Therefore, when the opening/closing operation knob 10 of the opening/closing lid 3 is pushed down, the temporary stopper 3
4 and the operation button 33a of the micro switch 33 are pressed down to close the switch 33, whereby current flows through the sheathed heater 32 and the heating plate 30 is heated. Further, at the same time, the pressing body 28 is strongly pressed against the heating plate 30, so that the opening of the resin bag 39 is always clamped and closed between the pressing body 28 and the heating plate 30, and the food 38 can be sealed by heating. It is vacuum packed in a resin bag 39. Next, when the cutter operating knob 11 is pressed down, the tip of the cutter 24 is lowered to a position where it enters the slit 29, as shown by the imaginary line in FIG. Therefore, when the knob 11 is pushed down and slid along the guide groove 12 from the left end toward the right end (or vice versa), the resin bag 39 is cut at a position near the opening end near the seal portion. Then, after turning off the power switch 7 and stopping the power supply to the electric blower 14 and the sheathed heater 32, the opening/closing lid 3 is opened by lifting the knob 10, and the resin bag 39 in which the food 38 is vacuum-packed can be taken out. can.

Therefore, according to this vacuum packing apparatus, fresh foods and the like can be easily vacuum packed by putting them into thermoplastic resin bags, and is suitable for general household use because it is simple in structure and operation.

Note that in the vacuum packing device described above, the width of the resin bag 39 is equal to the width of the intake port 17 of the intake nozzle 16.
If the width is much larger than the width of the bag, there is a problem that the part to be sealed becomes wrinkled, but this can be solved by attaching a bag opening mechanism shown in FIGS. 7 and 8 to the outer periphery of the intake port 17 Eliminate. In other words, a pair of expansion members 40 and 41 are bent into a U-shape.
loosely fit on the left and right sides of the outer periphery of the intake port 17 as shown in FIG.
Prepare a pair of a and 41b arranged in an X shape. One end of each of the links 40a, 41a is fixed with pins 40c, 41c inside the expansion members 40, 41, and pins 40d, 41d are provided at one end of each of the links 40b, 41b to connect them to the expansion members 40, 41.
Elongated holes 40e, 4 formed in 41 to be long in the intake direction
It is slidably fitted into 1e. Also, the other ends of the links 40a and 41a, and the link 40b,
The other ends of 41b are fixed to each other with pins 40f, 41f, and a hook 42 is attached to one pin 40f.
The other pin 41f is fixed to the center of the outer surface of the intake port 17. When the tension spring 43 is placed between both pins 40f and 41f, the pin 40f becomes the pin 4.
It is urged in the direction approaching 1f. Therefore, a guide groove 44 for guiding the pin 40f toward and away from the pin 41f is provided on the outer surface of the intake port 17, and a hook pin 45 is provided for separating the pin 40f from the pin 41f. When hook 42 is hooked on pin 45, both expansion members 4
0,41 can be held in the approach position.

When the hook 42 is removed from the hook pin 45, the pin 40f is pulled by the spring 43 and slides in the guide groove 44 in the direction of the pin 41f.
a and 41b extend to the left and right in the width direction of the intake port 17,
The pins 40d and 41d slide within the respective elongated holes 40e and 41e to move the expansion members 40 and 41 left and right as shown by imaginary lines in the figure.

Therefore, with the hook 42 hooked on the hook pin 45, a resin bag 39 is placed on the outside of both expansion members 40, 41.
When the hook 42 is removed from the hook pin 45, the tension of the spring 43 causes the expansion member 40,
41 will move left and right to the maximum width of the bag 39. In this state, the opening of the resin bag 39 is fully stretched in the width direction, so that the wrinkles in the area to be sealed are stretched out, making it possible to seal without wrinkles.

FIG. 9 shows another embodiment of the bag opening mechanism, which is also used to prevent the sealed portion of the resin bag 39 from wrinkling. That is, a pair of expansion members 46 and 47 having a U-shaped cross section are loosely fitted to the outer periphery of the intake port 17 of the intake nozzle 16 from the left and right, and these are fixed to the intake port 17 with pins 46a and 47a. Also,
The expansion members 46 and 47 have engaging protrusions 46b and 47b.
A tension spring 48 is provided between both members 46 and 47 to open them outwardly. On the other hand, a guide groove 49 that is long in the intake direction is formed in the center of the intake port 17, and an engagement member 50 that can move forward and backward along this groove 49 is provided, and this member 50 is connected to both the engagement protrusions 46b and 47b. engage. Furthermore, a hook 51 similar to that shown in FIG. The members 46, 47 are configured to be held in the closed position.

Therefore, with the hook 51 hooked on the hook pin 52, the resin bag 39 is attached to the outside of both the expansion members 46, 47.
When the hook 51 is removed from the hook pin 52, the tension of the spring 48 causes the expansion member 46,
47 rotates left and right to the maximum width of the bag 39, and the bag 39
can smooth out wrinkles. In addition, in this bag opening mechanism, if the rotating ends of the expansion members 46 and 47 are rounded as shown in the figure, the bag 39 can be secured to the expansion member 4.
There is no risk of it breaking at the 6 and 47 corners.

Although the above-mentioned embodiment is constructed as described above, in carrying out the present invention, an electric blower, an intake nozzle, a heater, a heating plate, a pressing body, an opening/closing lid, a substrate, etc. may be used as long as it does not go against the gist of the invention. The specific structure, shape, position, material, etc. of the , switch, temporary stopper, etc. are not limited to the above embodiment.
Of course, it can be configured and implemented in various ways.

[Effects of the Invention] According to the present invention, the gist of which is the structure described in the above claims, by temporarily fixing the opening/closing lid with the temporary fixing stopper, the closing operation of the switch that causes the heater to generate heat is temporarily prevented, and In this state, the air inside the resin bag is sucked out, and then the opening/closing lid is further pressed to close the switch, whereby the opening of the thermoplastic resin bag is clamped and closed by the heating plate of the sealing mechanism and the pressing body. is necessarily stronger, and the opening of the resin bag can be heat-welded to ensure that it is sealed tightly.This increases the reliability of the airtight seal in the vacuum pack, and also allows for the operation of heat-welding to be performed by opening and closing the lid. It has the advantage of being easy to handle since all you have to do is press the button.

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, in which FIG. 1 is an external perspective view of a vacuum packing device, and FIG.
The figure is a longitudinal sectional view of the device, FIG. 3 is a perspective view showing a part of the internal structure of the device, FIG. 4 is a perspective view showing the pressing body of the device taken out, and FIG. A-A
6 is a circuit configuration diagram of the device, FIGS. 7 and 8 show a bag opening mechanism added to the device, FIG. 7 is a front view of the mechanism, and FIG. 8 is a diagram of the same. A plan view of the mechanism, FIG. 9 is a plan view showing another bag opening mechanism. 3... Opening/closing lid, 13... Board, 14... Electric blower, 16... Intake nozzle, 28... Pressing body, 3
0... Heating plate, 31... Seal mechanism, 32... Sheathed heater, 33... Micro switch, 34...
...Temporary stopper, 39...Thermoplastic resin bag.

Claims (1)

[Scope of Claims] 1. An electric blower, an intake nozzle connected to the blower to suck out air in a thermoplastic resin bag covered on the outer periphery, and a position in front of the intake nozzle that clamps the opening of the resin bag. In a vacuum packing device equipped with a sealing mechanism that closes and heat-welds, the sealing mechanism is composed of a heater, a heating plate to which the heater is attached, and a pressing body that approaches and separates from the heating plate, and A pressing body is attached to the front side of the rotatably provided opening/closing lid, and the closing operation of the opening/closing lid is temporarily fixed at a position where the pressing body approaches the heating plate, and at the same time, a position at the upper end where the opening/closing lid abuts. The temporary stopper is movable below the height position in the temporarily fastened state, and the downward displacement presses the pressing body against the heating body, thereby allowing further closing operation of the opening/closing door. A switch is attached to the board side to which the heating plate is attached, and a switch in series with the heater is attached to the board side, and the switch maintains the open state when the opening/closing lid is in the open state and the above temporarily fastened state, and is provided with the above pressing force. A vacuum packing device characterized in that it uses a normally open switch that is closed by being pressed against the opening/closing lid while the body is pressed against the heating plate.