JPH05132017A - Sealing device for hermetic container - Google Patents

Abstract

PURPOSE:To eliminate defective sealing by a method wherein a covering material is stuck by heat sealing in a sealing section to a circular ridge provided on a flange part of a plastic container and after that, residual substance remained on an area outside the circular ridge is removed with a removing device. CONSTITUTION:In a process wherein a container main body 2 filled with fruits 4 and a jellied liquid 5 is carried, being housed in a retainer 11, a covering material 3, unwound from a wound body 31, is placed on a flange part 2b of the container main body 2. The container main body 2 is then transferred, with the covering material 3 placed thereon, by means of the retainer 11 to a position below a first sealing section 12 and is stopped there. The first sealing section 12 is then lowered and the covering material 3 is stuck by heat sealing to a circular ridge 7 provided on the flange part 2b. The retainer 11 is then carried again and while the retainer is carried further, residual liquid remained on an area outside the circular ridge 7 is removed with a removing device 15 by means of scraping with a scraper 15a that touches elastically the surface of the retainer 11 by force of a spring 20. After that, the covering material 3 is stuck completely by heat sealing applied by means of a second sealing section 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for hermetically sealed containers, and more particularly to a sealing device for hermetically sealed containers capable of reliable sealing.

[0002]

2. Description of the Related Art Heretofore, there has been known a sealed container for fruit products in which a plastic container body is filled with fruits, jelly liquid, etc. and the container body is sealed with a lid.

Of these, the plastic container body has a container body and a flange portion provided at the upper end opening of the container body. The container body is formed by thermoforming a plastic laminate. It On the other hand, the lid member is heat-sealed to the flange portion of the container body. In addition, an annular protrusion that protrudes upward is formed on the flange portion of the container body, and the annular protrusion firmly heat-seals the lid member.

[0004]

By the way, as described above, a plastic container main body is filled with fruit, jelly liquid, etc., and a flange is heat-sealed with a lid member to prepare a sealed fruit container. When the lid material is heat-sealed, the flesh of the fruit may not be surely heat-sealed and may be hindered.

That is, a conventional sealing device for a hermetically sealed container is provided with a retainer for holding a plastic container body and a vertically movable body above the retainer, and a lid member is heated and pressed against a flange portion of the container body. And a sealing portion for heat sealing. In such a hermetic container sealing device, if the pulp remains in the flange portion during heat sealing, the residual pulp enters between the flange portion and the lid member, and heat sealing cannot be performed reliably. In this case, there arises a problem of poor sealing between the container body and the lid member.

The present invention has been made in consideration of the above points, and can reliably perform heat sealing,
An object of the present invention is to provide a sealing device for a hermetic container that does not cause the problem of defective sealing.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a retainer for continuously transferring a plastic container body having a flange portion, and a retainer disposed above the retainer so as to be vertically movable, are provided on the flange portion. A first seal portion for heat-sealing a plastic lid member with respect to an annular protrusion provided, and a vertically movably disposed downstream of the first seal portion, the lid portion being provided with respect to the flange portion. A second seal portion for heat-sealing the material, and a residue that is provided between the first seal portion and the second seal portion and presses the lid material and remains outside the annular projection on the flange portion. A sealing device for a hermetically sealed container, comprising a removing device for removing.

[0008]

The container body filled with the contents is placed in the retainer, and the lid member is placed on the flange portion. The retainer transfers the container body and the lid material to the first seal portion, the first seal portion descends, and the lid material is heat-sealed to the annular protrusion of the flange portion. Then, the retainer transfers the container body and the lid member to the removing device, and the removing device removes the residue remaining outside the annular protrusion on the flange portion. Subsequently, the retainer transfers the container body and the lid member to the second seal portion, the second seal portion descends, and the lid member is heat-sealed to the flange portion.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

First, a sealed container obtained by the sealing device according to the present invention will be described with reference to FIG.

As shown in FIG. 5, a sealed container 1 for fruit products.
Is formed by filling the container body 2 with the fruit 4 and the jelly liquid 5 and sealing the packaging container 2 with the lid member 3.

The container body 2 includes a container body 2a and a container body 2
and a flange portion 2b provided on the periphery of the upper end opening of a. On the other hand, the lid member 3 is the flange portion 2b of the container body 2.
It is designed to be heat-sealed. Further, the flange portion 2b of the container body 2 is formed with an annular projecting portion 7 protruding upward, and the lid member 3 is firmly heat-sealed (fused) by the annular projecting portion 7 so that the container body 2 is sealed. Is becoming

The container body 2 is made of polypropylene (P
P) / adhesive layer (AD) / ethylene / vinyl alcohol copolymer (EVOH) / adhesive layer (AD) / polypropylene (PP) laminate is thermoformed.

On the other hand, the lid member 3 is made of, for example, a gas barrier laminate of ON (stretched nylon) / AD / EVOH / AD / sealant layer. The lid member 3 is heat-sealed with the sealant layer facing the flange portion 2b side of the container body 2.

Next, a sealing device for a hermetically sealed container according to the present invention will be described with reference to FIGS. 1 to 4 and 6.

As shown in FIG. 6, the sealing device 10 for a hermetic container is provided with a retainer 11 for arranging a plastic container body 2 having a flange portion 2b therein and continuously transferring it to the left in FIG. There is. Above the retainer 11,
A first seal portion 12 for heat-sealing the lid member 3 is arranged movably in the vertical direction with respect to the annular protrusion 7 provided on the flange portion 2b. Further, on the downstream side of the first seal portion 12, a second seal portion 22 for heat-sealing the lid member 3 over the entire surface of the flange portion 2b is arranged above the retainer 11 so as to be vertically movable. .. Further, between the first seal portion 12 and the second seal portion 22, there is provided a removing device 15 that presses the lid member 3 from above and removes the residue remaining on the flange portion 2b. The lid member 3 is adapted to be drawn out from a winding body 31 provided on the upstream side of the first seal portion 12. Further, a trimming device 29 for cutting the outer periphery of the flange portion of the lid member 3 heat-sealed to the flange portion 2b of the container body 2 is disposed downstream of the second seal portion 22.

Next, the components of each part will be described in detail with reference to FIGS. As shown in FIG. 2, the first seal portion 1
2 has a pressing head 14 that heats and presses the lid member 3 downward, and the lower end surface of the pressing head 14 is flat.

Further, as shown in FIGS. 1 and 3, the removing device 15 has a scratching portion 15a for pressing the lid member 3 from above.
A horizontal plate 15b for holding the scratched portion 15a, and a horizontal plate 15b
And a vertical plate 15c connected to. Figure 1
For the sake of convenience, the first seal portion 12, the second seal portion 22, and the trimming device 29 are removed. Vertical plate 15
A lower stopper 16 is fixed to the upper end of c, and a stem 17 is fixed above the lower stopper 16. Further, the stem 17 is movably attached to the upper stopper 18, and the spring 2 is provided around the stem 17 between the upper stopper 18 and the lower stopper 18.
0 is wrapped around. Further, the upper stopper 18 is movable in the vertical direction by the drive unit 19. Further, although the auxiliary scratching portion 27 is provided at the intersection of the horizontal plate 15b and the vertical plate 15c, the auxiliary scratching portion 27 does not necessarily have to be provided.

Further, as shown in FIG. 4, the second seal portion 22 has a pressing head 24 which heats and presses the lid member 3 downward. The pressing head 24 has the same shape as the pressing head 14 of the first seal portion 12.

Next, the operation of this embodiment having such a configuration will be described.

First, the container body 2 filled with the fruit 4 and the jelly liquid 5 is housed in the retainer 11. Then, the lid member 3 fed from the roll body 31 onto the flange portion 2b is
The sealant layer is placed face down. In this state, the retainer 11 transfers the container body 2 and the lid member 3 to the first seal portion 12 (FIG. 2).

In this case, the pulp 4a (residual portion) of the fruit 4 may generally remain on the flange portion 2b. When the container body 2 and the lid member 3 are transferred to the first seal portion 12, the retainer 11 stops and the first seal portion 12 descends toward the retainer 11. Then, the pressing head 14 of the first seal portion 12 heats and presses the lid member 3 against the annular protrusion 7, and heat seals the lid member 3 to the annular protrusion 7 of the flange portion 2b.

Subsequently, the retainer 11 transfers the container body 2 and the lid member 3 heat-sealed to the annular projection 7 of the container body 2 to the removing device 15. In this case, the removing device 15 is driven by the drive unit 19 and descends toward the retainer 11 side, and the scratching portion 15 a and the auxiliary hooking portion 27 of the removing device 15 are removed.
Presses the surface of the retainer 11 elastically by the force of the spring 20. In this state, the retainer 11 transfers the container body 2 and the lid member 3 to the second seal portion side. During this time,
The scratching portion 15a of the removing device 15 elastically presses the lid material 3 from above to remove the pulp 4a of the fruit 4 remaining on the flange portion 2b and outside the annular projection 7 (FIG. 3). .. After that, the auxiliary hooking portion 27 further removes the pulp 4a of the fruit 4.

Subsequently, the retainer 11 transfers the container body 2 and the lid member 3 to the second seal portion 22 (FIG. 4). When the container body 2 and the lid member 3 are transferred to the second seal portion 22, the retainer 11 stops and the second seal portion 22 descends toward the retainer 11. Then, the pressing head 24 of the second seal portion 22 heats and presses the lid member 3.

In this way, the lid member 3 is attached to the flange portion 2b of the container body 2 having the fruit 4 and the jelly liquid 5 filled therein.
Are heat-sealed to obtain the sealed container 1.

As described above, according to this embodiment,
After heat-sealing with the first seal portion 12, the scraping portion 15a of the removing device 15 can remove the pulp 4a remaining outside the annular protrusion 7 on the flange portion 2b. Thus, the lid member 3 can be surely heat-sealed to the flange portion 2b outside the annular protrusion 7. Therefore, it is possible to obtain the hermetically sealed container 1 which has no defective sealing and is excellent in appearance.

As the second seal portion, a step portion 24a may be provided on the pressing head 24 as shown in FIG. 7, so that only the portion corresponding to the outside of the annular protrusion 7 is pressed. In this case, the lower end surface of the pressing head 24 is knurled to improve the heat sealability.

[0028]

As described above, according to the present invention, after the lid member is heat-sealed to the annular projection by the first seal portion, the residue remaining outside the annular projection on the flange portion by the removing device. Is removed, the lid member can be surely heat-sealed to the flange portion outside at least the annular protrusion by the second seal portion. For this reason, it is possible to obtain a hermetically sealed container having no defective sealing of the contents.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a sealing device for a hermetic container according to the present invention.

FIG. 2 is a side sectional view showing a first seal portion and a retainer.

FIG. 3 is a side sectional view showing a removing device and a retainer.

FIG. 4 is a side sectional view showing a second seal portion and a retainer.

FIG. 5 is a view showing a hermetically sealed container produced by heat sealing according to the present invention.

FIG. 6 is a schematic side view of a hermetic container sealing device.

FIG. 7 is a side sectional view showing another embodiment of the second seal portion and the retainer.

[Explanation of symbols]

 1 Sealed Container 2 Container Main Body 2a Container Body 2b Flange Part 3 Lid Material 10 Sealed Container Sealing Device 11 Retainer 12 First Sealing Part 15 Removal Device 15a Scratching Part 22 Second Sealing Part

Claims (1)

[Claims] 1. A retainer for continuously transferring a plastic container main body having a flange portion, and an annular projection provided on the flange portion, the retainer being arranged above the retainer so as to be vertically movable. Seal part for heat-sealing the plastic lid material, and a second seal for movably arranged in the vertical direction on the downstream side of the first seal portion for heat-sealing the lid material to the flange portion. And a removing device that is provided between the first seal portion and the second seal portion and presses the lid member to remove a residue remaining outside the annular protrusion on the flange portion. A sealing device for a hermetic container characterized by the following.