JPS62146126A - Sealing device for resin bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention relates to a sealing device for resin bags, and is particularly suitable for sealing a resin bag containing food by extracting air from it in order to improve the shelf life of the food. Sealing used [Prior art 1 Conventionally, for example, when sealing a t3 bag containing food as described above, the opening was heat welded after removing the air inside the resin bag. The sealing device-
As JR model examples, the ones shown in Figure F8 and Figure 9 are known.

This sealing device 1 is provided with a suction means 5 having a suction 7 and a suction 4 approximately in the middle of one long side of the upper surface of a rectangular parallelepiped base 2, and further provided with a suction means 5 having a suction 7 and a suction 4 on the upper surface of the base 2 near the other long side. It has a configuration in which a pressing plate 6 is hingedly connected.

As shown in Fig. f:tS9, this sealing device 1 positions the entire length of the opening of the resin bag A between the heater 3 and the front edge of the pressing plate 6, and draws air into the interior from the opening. The nozzle 4 is inserted, and in this state, the entire opening of the resin bag is clamped between the pressing plate 6 and the base 2 to temporarily seal it, and then the air inside the resin bag A is removed by the suction means 5, and then While maintaining the above-mentioned clamped state, the opening is heated.

Problems to be Solved by the Invention] In the above-mentioned conventional compact J1 device, the heater 3 is energized to weld the entire length of the opening while maintaining the Vi sound lamp state for removing the air inside the resin bag l\. Therefore, the heater 3 must be longer than the width of the opening of the bag that is to be heated to a density of 1 ton L, resulting in a large device. Such a large sealing device is extremely difficult to use, for example, when used at home on a table or the like. Also,
Since the size of the sealed plastic bag is limited by the length of the heater 3, it cannot be used for larger resin bags, which is inconvenient.

Means for resolving Problem 7α 1 In the present invention, in order to solve the above-mentioned problems, an exhaust means provided with a suction nozzle inserted into the resin bag from the opening thereof, and a means for inserting the suction nozzle are provided. a first heater that thermally welds the opening while leaving an unwelded portion of the opening, and a second heater that thermally welds the unwelded portion of the opening bypassing the suction nozzle in the inserted state. The structure is as follows.

[Function] By moving the first heater to F3 along the opening of the bag, most of the rjn opening is thermally welded, and the suction nozzle of the exhaust means is inserted from the remaining unwelded part. By removing the air inside the plastic bag and then heat welding the unwelded parts around the suction nozzle using the second heater, the entire opening will be thermally welded, regardless of the size of the opening. Can be sealed.

[Example] Hereinafter, an example of the present invention will be described based on Fig. Ii to Fig. fjrJ7.

Reference numeral 7 in FIG. 1 indicates a sealing device for a resin bag according to this embodiment. a first heater 11 provided at the other end of the casing 8; a second heater 12 provided at one end of the casing 8 surrounding the suction nozzle 9; Can be rotated at one end of casing 8! Z a If Rah, 2nd Nohita 12 Tono Ma Te? jf#4i:! A clamping plate 13 that clamps the opening of A
It is roughly composed of:

Next, to explain these in detail, the exhaust means 10 has a casing 8 as an outer shell structure, and has a seven ant 14 and a motor 15 for rotationally driving the seven ant t disposed inside the casing 8. The suction nozzle 9 is installed in the suction port 8a of the casing 8, and an exhaust hole 16 is formed in the casing 8 at a position surrounding the hole 11.

The heater 11 of the fjS1 is provided with a rotating roller 17 made of metal at a position protruding from the other end of the casing 8, an iron core 18 for heat transfer so as to be in contact with the rotating roller 17, and a It is constructed by closely adhering a resistance heating element 19 such as a nichrome wire.

The second heater 12 is shown in FIGS. 1 and 2/:X
A substantially U-shaped support surface 20 is formed so as to pass through the center of the bracket 9 and surround the front and both sides of the bracket suction nozzle 9, and a resistance heating element 12a such as a nichrome wire is disposed on this support surface 20. Furthermore, as shown in FIG. 3, this resistance heating element 12a is covered with a material 12I) which has excellent heat resistance and thermal conductivity and is not thermally welded to the resin bag A. . Note that the side of the holding plate 13 is also coated with a similar heat-resistant material 13b.

On the other hand, when the suction nozzle 9 and the clamping plate 13 rotate the clamping plate 13 toward the support surface 20, the suction nozzle
A gasket 21 is attached which brings the suction nozzle 9 into airtight contact with the opening of the drawer I bag Δ into which the suction nozzle 9 is inserted.

Next, a case will be described in which the resin bag AI is sealed using the sealing device of this embodiment, which has been completed in this way.

First, by energizing one resistance heating element constituting the first heater 11, it rotates through the iron core 18, and by moving the heated rotating roller 17 along the opening of the resin bag A. - As shown by the chain line in FIG. 4, the opening is heated 1.8 times, leaving an unwelded portion C.

Next, as shown in Figure r54, the suction nozzle 9 is inserted into the resin bag A from the unwelded portion C, and
By rotating the holding plate 13, the unwelded portion C is brought into close contact with the suction nozzle 9 by the gasket 21, thereby creating a temporarily sealed state.

In this state, the exhaust means 10 was driven to remove 2ejC from the resin bag A, but the holding plate 13 was further rotated to open the opening of the resin bag A between it and the second heater 12. Then, the second heater 12 is energized to generate heat. As a result, the unwelded portion C of the opening is thermally welded as shown by the broken line in the PJS diagram.

By the above operations, the resin bag A can be sealed with the air inside thereof removed.

During this sealing operation, most of the entrance to the resin bag is thermally welded by the first heater 11, and a small portion that allows the suction nozzle 9 to be inserted is heated by the second heater 12; Therefore, a reliable seal can be achieved regardless of the size of the opening of the 3l fat bag A.Furthermore, for the heater 11, as long as the contact surface with the resin bag A is ensured. Furthermore, since the second heater 12 only needs to have a length sufficient to surround the suction nozzle 9, the device can be made compact.

Please note that the sealing procedure is not limited to the above method.
As shown in FIG. 6, it is also possible to heat weld both sides of the opening, leaving the center of the opening, using the first heater 11, and then heat weld the unwelded part C in the center in a U-shape using the heater 12 of fffi2. 'Ck is over.

- Also, the shapes and dimensions of each of the 61 components shown in the above embodiments are merely examples, and can be modified in various ways. For example, the second heater 12 is not limited to a )-shape, but may also be semicircular or V-shaped, and as shown in FIG. It may also be a straight line that is inclined in opposite directions.

Further, the first heater 11 may have a fixed edge instead of the rotating roller 17, or the ml heater 11 may be made independent from other pathogenic members.

[Effects of the Invention] As described above, the If resin bag sealing device according to the present invention thermally welds most of the ■I mouth portion of the resin bag up to the heater of ff1l, and from the remaining unwelded portion. It has a stone structure in which the air inside is sucked out through the inserted suction nozzle, and then the unwelded parts are thermally welded by the heater of FA2, bypassing the suction nozzle, so it can be used with any size resin bag. The opening can also be sealed.

Since both the first heater and the second heater have short required lengths, they are significantly more compact than conventional heaters, making them extremely easy to handle.

[Brief explanation of drawings]

Figures fjS1 to @6 show an embodiment of the present invention.
Figure ft51 is a vertical cross-sectional view, Figure 2 is a partially omitted side view,
Fig. 11 and Fig. fjS5 are both explanatory diagrams of how to use them, Fig. fjS6 is an explanatory diagram of another method of use, and Fig. 7 is a diagram similar to Fig. 5 for explaining other embodiments. Figures 8 and 19 are conventional FJ! Fig. fjS8 is a perspective view, and Fig. f59 is a side view. 7... Sealing device (for resin bags), 8... Casing,
9... Suction nozzle, 10... Exhaust means, 11...
fjSl heater, 12...second heater, A...
resin bag

Claims (1)

[Claims] This is a sealing device that seals the resin bag by welding the opening of the resin bag after removing the air inside the resin bag, and includes a suction nozzle (9) inserted into the resin bag from the opening.
); a first heater (11) for thermally welding the opening while leaving an unwelded portion (C) for inserting the suction nozzle; A sealing device for a resin bag, comprising a second heater (12) that bypasses the nozzle and thermally welds the unwelded portion (C) of the opening.