JPS6344610B2 - - 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, a suction protrusion (intake nozzle) of an air suction pump is inserted into the opening of a thermoplastic resin bag filled with foodstuffs, etc. There is a known vacuum packing device in which the air inside the resin bag is removed by suction, and then a press table that holds the opening of the resin bag is immediately heated to heat and weld the opening of the resin bag. ing.

[Problems to be Solved by the Invention] However, in this prior art, although the width of the resin bag is much larger than the width of the suction protrusion, the opening of the resin bag is held in a shape suitable for heat welding. No measures have been taken to do so. Therefore, the seal portion formed by heat welding often becomes wrinkled, and there is a problem in that the wrinkles tend to cause seal failure.

[Means for Solving the Problems] Therefore, in order to solve the above-mentioned conventional problems, the present invention includes an electric blower, a thermoplastic resin bag connected to the blower, and a thermoplastic resin bag that covers the outer periphery of the air blower to remove the air inside the resin bag. In a vacuum packing device, the vacuum sealing device is equipped with an intake nozzle that sucks out the resin bag, and a sealing mechanism that clamps and closes the opening of the resin bag at a position in front of the intake nozzle and heat-welds the opening of the resin bag. A bag opening tensioning mechanism having a pair of wrinkle smoothing members that horizontally pulls the opening of the resin bag in the width direction and flattens it by moving outward of the resin bag is moved to the outside of the bag. It is characterized in that it is provided on the outer periphery of the nozzle.

[Function] The thermoplastic resin bag containing fresh food, etc. is provided with its opening over the intake nozzle, and thereby the inner side of the pair of openings of the bag opening mechanism provided on the outer periphery of the intake nozzle. It is in a state where it has entered. In this state, the wrinkle smoothing member moves horizontally toward the outside of the resin bag. Therefore, since the wrinkle smoothing member horizontally stretches the opening of the resin bag in the width direction to flatten it, the wrinkles in the sealed portion of the opening of the resin bag are smoothed out. Then, the air in the resin bag is sucked out through the intake nozzle by the operation of the electric blower, and then the sealing mechanism is operated. This sealing mechanism clamps and closes the portion to be sealed, which has been smoothed out and made into a flat shape as described above, and heat-welds it. Therefore, it is possible to prevent wrinkles from forming in the seal portion.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 8.

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 up and down. 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 part 3b of the opening/closing lid 3 so as to pass between the upper and lower surfaces and to be elongated 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 lifting 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. In addition, the base 1 has a stopper 34 that can be raised and lowered freely.
However, its upper end protrudes from the upper surface of the substrate 13 and is opposed to the lower surface of the front plate portion 3b. 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. Although it is prevented from being operated, when the opening/closing operation knob 10 of the lid 3 is pushed down by hand, the spring 34 is released as shown by the solid line in the figure.
The micro switch 33 is lowered against the lower surface of the front plate portion 3b to allow the micro switch 33 to be turned on by the lower surface of the front plate portion 3b.

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.

A bag opening tensioning mechanism 55 shown in FIGS. 7 and 8 is provided on the outer periphery of the intake nozzle 16. This mechanism 55 is used to smooth out wrinkles in the opening of the thermoplastic resin bag 39 covering the intake nozzle 16 to obtain a reliable seal.

That is, a pair of U-shaped wrinkle smoothing members 40 and 41 are loosely fitted on the left and right sides of the outer periphery of the intake nozzle 16 as shown in FIG.
Prepare a pair of a, 40b, 41a, and 41b arranged in an X shape. And links 40a, 41a
Pins 40c, 41c are fixed to the inside of wrinkle smoothing members 40, 41, and links 40b, 4
Pins 40d and 41d are provided at each end of 1b, and these pins are slidably fitted into long holes 40e and 41e formed in the wrinkle smoothing members 40 and 41 to be elongated in the intake direction. Further, the other ends of the links 40a and 41a and the other ends of the links 40b and 41b are fixed to each other with pins 40f and 41f, and one pin 40
A hook 42 is attached to f, and is fixed to the other pin 41f at the center of the outer surface of the intake port 17. When the tension spring 43 is placed between the pins 40f and 41f, the pin 40f is biased toward the pin 41f. 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 nozzle 16, and a hook pin 45 for separating the pin 40f from the pin 41f is provided. Hook 4 on 45
2, the wrinkle smoothing members 40 and 41 can be held in the close position.

Therefore, in this bag opening tensioning mechanism 55, when the hook 42 is removed from the hook pin 45, the pin 40f is pulled by the spring 43 and the pin 4 is moved inside the guide groove 44.
1f direction, and the left and right links 40a, 40b, 41a, 41b assembled in an X shape extend left and right in the width direction of the intake nozzle 16, so the pin 40d,
41d can slide in the respective elongated holes 40e, 41e to horizontally move the wrinkle smoothing members 40, 41 from side to side as shown by imaginary lines in the figure.

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. . By setting the resin bag 39 in this way, the shrinkage member 40,
The bag opening tensioning mechanism 55 having the opening 41 enters inside the opening of the resin bag 39. In this state, the hook 42 is hooked on the hook pin 45, so if this hook 42 is removed from the hook pin 45,
The wrinkle smoothing member 4 due to the tension of the spring 43
0 and 41 will horizontally move left and right to the maximum width of the resin bag 39. In this state, the opening of the resin bag 39 is fully stretched in the width direction.
The wrinkles in the area to be sealed are smoothed out and the area becomes flat. Thereafter, 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 stopper 34 (the position shown by the imaginary line in FIG. It is still held open. Next, when the power switch 7 is turned on, the electric blower 14 is activated and air 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, and the air inside the resin bag 39 is generated. 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 pressed down, the stopper 34 and the operation button 33a of the micro switch 33 are pressed down on the lower surface of the front plate 3b of the lid 3, as shown in FIG. 5, to open the switch 33. ,
As a result, current flows through the sheathed heater 32 and the heating plate 30 is heated. At the same time, the pressing body 28
is pressed against the heating plate 30, and the opening of the resin bag 39, which has been smoothed out by the wrinkle smoothing members 40 and 41 of the bag opening mechanism 55, is closed by being held between the pressing body 28 and the heating plate 30, and Sealing is performed by heat welding. Therefore, the resin bag 39 can be sealed without causing wrinkles in the sealed portion. In the manner described above, the food 38 is vacuum packed in the 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 device, fresh foods and the like can be easily and reliably vacuum packed in thermoplastic resin bags, and because it is simple in structure and operation, it is suitable for general household use.

FIG. 9 shows a modification of the bag opening mechanism 55 shown in FIGS. 7 and 8, which is also used to prevent the sealed portion of the resin bag 39 from wrinkling. That is, the intake port portion 17 of the intake nozzle 16
A pair of wrinkle smoothing members 4 having a U-shaped cross section on the outer periphery
6 and 47 from the left and right, and connect them to the intake port part 1.
7 with pins 46a and 47a. In addition, the wrinkle smoothing members 46 and 47 have engaging protrusions 46b and 47b.
A tension spring 48 is provided between the wrinkle smoothing 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.
An engaging member 50 that is movable forward and backward along the line 9 is provided, and this member 50 is engaged with both the engaging protrusions 46b and 47b. Further, a hook 51 similar to that shown in FIG.
1 is provided with a hook pin 52 for hooking the hook 51.
When hooked on the hook pin 52, the wrinkle smoothing member 4
6 and 47 are held in the closed position.

Therefore, the bag opening mechanism 5 shown in FIGS. 7 and 8
5, after putting the resin bag 39 on the outside of both wrinkle smoothing members 46 and 47 with the hook 51 hooked on the hook pin 52, the hook 51 is hooked on the hook pin 52.
When removed from the bag, the tension of the spring 48 causes the wrinkle smoothing members 46 and 47 to horizontally rotate left and right to the maximum width of the resin bag 39, allowing the wrinkles of the resin bag 39 to be smoothed out. In this bag opening tensioning mechanism 55, if the rotating ends of the wrinkle smoothing members 46, 47 are rounded as shown in the figure, there is no risk of tearing the resin bag 39 at the corners of the wrinkle smoothing members 46, 47.

〔Effect of the invention〕

The present invention, which has been explained above based on the embodiments, has the gist of the structure set forth in the claims. A sealing mechanism located in front of the intake nozzle clamps and closes the opening of the resin bag and heat-welds it, which of course allows for easy vacuum packing with a simple configuration. Then, in this vacuum packing operation, the present invention has a structure in which the opening of the resin bag is pulled into a flattened shape by a wrinkle smoothing member included in the bag opening tensioning mechanism, and the above-mentioned heat welding is performed in the wrinkle smoothed state. This has the effect of preventing incomplete sealing due to wrinkles and providing a vacuum packing device with high sealing reliability.

[Brief explanation of the drawing]

1 to 8 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 diagram of the device, FIG. 7 is a front view of a pair of wrinkle smoothing members, FIG. 8 is a plan view of the bag opening mechanism, and FIG. 9 is a diagram of another bag opening mechanism. It is a top view showing an embodiment. 14...Electric blower, 16...Intake nozzle, 3
1... Sealing mechanism, 39... Thermoplastic resin bag, 4
0, 41, 46, 47...Wrinkle smoothing member, 55
...Bag opening mechanism.

Claims (1)

[Claims] 1. An electric blower, an intake nozzle that is connected to the blower and whose outer periphery is covered with the opening of a thermoplastic resin bag to suck out the air inside the resin bag, and a A bag opening tensioning mechanism having a pair of wrinkle smoothing members that are inserted into the plastic bag and moved horizontally, and are moved outward of the plastic bag to horizontally pull the opening of the plastic bag into a flattened shape. and a sealing mechanism that clamps and closes the flat opening of the resin bag at a position in front of the intake nozzle and heat-welds it.