JPH0737241B2 - How to seal the container - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for sealing a container, and more particularly to a method for sealing a container having an opening at least at one end of a tubular body for sealing the opening. .

[Conventional technology]

Examples of conventional techniques related to the method for sealing the opening of the container include Japanese Patent Publication No. 59-18244 and Japanese Patent Publication No. 56-151.
There is a technique described in Japanese Patent No. 672, and other well-known techniques.

JP-B-59-18244 discloses that an adhesive is applied to an upper edge fitting portion of a box-shaped container body having an opening at an upper portion by an application roller, and the upper edge fitting portion coated with the adhesive is applied to the upper edge fitting portion. A method of delivering a cap and sealing an opening of a container formed by fitting the cap to the upper edge fitting portion is shown.

Further, in JP-A-56-151672, in a container having a step on the upper side surface of the edge curl portion of a paper cup, the step portion on the upper side surface of the edge curl portion has an appropriate width from the step. Also, apply a hot-melt adhesive hot melt adhesive, and then cover the lid with the adhesive directly on the required position on the back of the top plate, and then heat the area corresponding to the curl of the edge of the paper cup. A method of sealing a container (paper cup) formed by pressing and adhering the back surface of the lid top plate to the upper surface of the edge curl portion of the paper cup is shown.

Further, in the well-known collection of conventional patent offices, in the above-mentioned opening of a cylindrical container having an opening at the top, a lid body having a heat-sealing adhesive applied to the back surface or a resin laminate to the back surface is disclosed. There is disclosed a method of sealing a container by covering the entire surface with a sealing body, and then pressurizing and heating the outside of the lid body or the sealing body to seal the opening.

[Problems to be Solved by the Invention]

However, in the container sealing method disclosed in Japanese Patent Publication No. 59-18244, an adhesive is applied to the upper edge fitting portion of the container body by a coating roller, and the upper edge fitting portion coated with the adhesive is applied. Since this is done by fitting the cap, in the case of this sealing method, the adhesive can be applied only to the upper edge fitting portion, and the sealing performance of the opening portion by the cap becomes insufficient. In addition, due to the height variation of the container body and the influence of the step of the upper edge fitting portion that tends to occur due to the bonding accuracy when forming the container body, the adhesive cannot be uniformly applied, and the cap is sealed. There are drawbacks that cannot be ensured.

Further, the container sealing method disclosed in Japanese Patent Laid-Open No. 56-151672 does not affect the height variation and the step of the paper cup, and reliably seals the paper cup. However, when the container is a carton having a rectangular tubular body, the curl portion cannot be formed at the opening edge, and therefore the adhesive cannot be applied to the step, and the carton opening cannot be sealed.

Furthermore, since the well-known and conventional technique described above is a configuration in which an adhesive or resin is simply applied to the entire back surface of the lid or seal and then the opening of the container is covered, adhesive or the like is applied to unnecessary portions. There is a drawback that it becomes uneconomical when applied, and if there is a step in the opening, there is a risk that the sealing property of the opening will be insufficient.

It should be noted that there is no description or suggestion of bending the sealing material in the direction along the rectangular tubular body portion of the carton in the above-mentioned conventional technique.

Therefore, an object of the present invention is to reliably adhere the sealing material to the opening without being influenced by the variation in the height of the container and the stepped portion that may be formed in the opening. The sealing performance of the section can be improved, the adhesive can be used economically, and the sealing paper can be easily and reliably sealed by only pressing the sealing paper from above, so that the sealing work can be performed easily. It is to provide a method of sealing a container that can be.

[Means for Solving the Problems]

In a method of sealing a container, which seals the opening of a container having an opening provided at least at one end of a rectangular tubular body, in a sheet-shaped sealing material that seals the opening, an opening edge portion of the opening. After applying an emulsion-type adhesive in a shape slightly wider than that of the above-mentioned shape, the sealing material is covered on the opening, and then the pressing elastic body having a downward pressing portion, and the pressing portion is formed on the container. By pressing the opening edge portion of the container from the upper portion of the sealing material located on the outer upper part of the body, the sealing material is bent in the direction along the rectangular tubular body portion, and the opening edge portion of the container and The rectangular tubular body is adhered to a surface along the opening edge portion, the opening of the container to which the sealing material is adhered has a top plate portion having a shape corresponding to the shape of the opening, and The above-mentioned Is obtained by achieving the above objects by providing a sealing method of a container, characterized in that covering lid having a side plate portion which is four continuously provided in the bent portion to cover the wood.

〔Example〕

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

FIG. 1 is a plan view showing a mode in which an adhesive is applied to a sealing material,
FIG. 2 is a sectional view showing a mode in which a sealing material is put on a container, FIG.
The figure is a cross-sectional view showing a mode in which the sealing material is pressed from the outside and adhered to the opening edge of the container.

In order to seal the opening of the container (carton) by the container sealing method of the present invention, first, as shown in FIG. 1, for example, one surface of the sealing material 1 cut into a predetermined size from a roll state is cartoned. The adhesive 5 is applied to a shape (a square shape in the drawing) corresponding to the shape of the opening edge portion 4 of the second opening portion 3 with a slightly wider width.

Next, as shown in FIG. 2, the sealing material 1 coated with the adhesive 5 as described above is made to correspond to the opening edge portion 4 of the adhesive 5 and the opening portion of the carton 2 described above. Cover 3

Thereafter, as shown in FIG. 3, the sealing material 1 is bent in a direction along the rectangular tubular body portion 2a of the carton 2, and
The sealing material 1 is surely attached to the surface along the opening edge portion 4 of the carton 2 and the opening edge portion of the rectangular tubular body portion 2a by the pressing force from the upper portion of the sealing material 1 (for example, from the arrow P direction). Adhesion is performed and the opening 3 of the carton 2 is sealed.

To further explain the bending adhesion of the sealing material 1,
As shown in FIG. 10, by pressing the pressing elastic body 53 having the downward pressing portion from the upper portion of the sealing material 1 with the pressing portion being positioned on the upper outer side of the body portion of the container 2. , Done.

In addition, to explain the materials of each part, carton 2
Is, for example, basis weight 580 or 680 g / m ² of about N-PE, or of a basis weight 580 g / m ² about NSK a (moisture agent was混抄paperboard), moisture permeability 30 g / m of about ² · 24 hr or It can be formed of things.
In this case, as N-PE having a basis weight of about 580 g / m ² , a basis weight of 320
g / m ² coated ball, 20μ thick LDPE and basis weight 240g / m ²
Includes those made from Jute Liner, which weighs 680g.
/ The m ² of about N-PE, coated cardboard having a basis weight of 380 g / m ^2, include those made of LDPE and jute liner having a basis weight of 280 g / m ² thickness 20 [mu].

The sealing material is, for example, A1 foil / glassine paper, pure white roll paper / OPP / glassine paper, glassine paper / HDPE / glassine paper, glassine paper / A1 foil / glassine paper, glassine paper / OP.
It can be formed of each laminated material such as P / glassine paper. More specifically, for example, the thickness A1 foil / basis weight 26.5 g / m ² glassine paper 7 microns, basis weight 35 g / m ² of pure white roll paper / thickness 20μ of OPP / basis weight 25.8
g / m ² glassine paper, basis weight 25.8 g / m ² glassine paper / thickness 25 μHDPE / basis weight 25.8 g
/ m ² glassine paper, basis weight 25.8g / m ² glassine paper / 7μ thick A1 foil / basis weight 2
5.8g / m ² glassine paper, basis weight 25.8g / m ² glassine paper / thickness 20μ OPP / basis weight 25.8
It can be formed with each laminated material of g / m ² glassine paper, but preferably the above-mentioned basis weight 25.8 g / m ² glassine paper / OPP of thickness 20μ / basis weight
Formed with 25.8 g / m ² glassine paper lap material.

Adhesive 5 is manufactured by Showa Polymer Co., Ltd. under the trade name Polysol (vinyl acetate, poval, an emulsion type adhesive containing plasticizer as a main component), and Hoechst Synthetic under the trade name Movinyl (vinyl acetate, plasticizer (dibutyl). Emulsion type adhesive containing phthalate) as a main component) or the like can be used.

Next, an embodiment of the container sealing method of the present invention will be described together with a part of an example of an apparatus used for carrying out the method.

FIG. 4 is a side view showing a sealing material covering device which cuts a predetermined size and applies an adhesive to the opening of the carton, and FIG. 5 is an adhesive applying part of the sealing material covering device. FIG. 6 is a side view showing the apparatus, FIG. 6 is a perspective view showing a roller for applying an adhesive, and FIGS. 7 (a) to 7 (c) are schematic views showing an order of applying the adhesive to the sealing material, and FIG. The figure is a perspective view showing a state in which the opening of the carton is covered with a sealing material (shown by a chain double-dashed line in the figure), and Fig. 9 is a side view showing a pressing device for pressing the sealing material covered in the opening of the carton. Fig. 10 is a cross-sectional view showing a state in which the sealing material covering the opening of the carton is being pressed by the pressing device, and Fig. 11 is a cover covering the outside of the opening of the carton with the sealing material. Fig. 12 is a side view showing the device. Fig. 12 shows the state in which the opening of the carton is sealed with a sealing material and the outside is covered with a lid. Parts is a perspective view showing a broken.

First, the sealing material covering device 30 shown in FIGS. 4 to 6 will be described. The sealing material covering device 30 is provided in the vicinity of the upper side of the carton transfer device 20 for transferring the carton 2 and vacuums the sealing material 1. Sticking roller that can be held
31 and a return roller 32 provided at a predetermined distance from the sticking roller 31 in the transport direction of the carton 2 (direction of arrow R), and both grooves (not shown) formed in both rollers 31, 32. Round belt erected between
33, and the peripheral speeds of these rollers 31, 32 and the rotation speed of the round belt 33 are synchronized with the conveying speed of the carton 2 by the carton conveying device 20. In addition, the sealing material covering device 30 is a sealing material original roll setting station 34 in which the sealing material 1 is set in a state of being wound on a roll.
And a sealing material feed roller 35 that sends out the sealing material 1 set in the original sealing material roll setting station 34 toward the sticking roller 31.
A blade (not shown) is provided in the vicinity of 31 for cutting the sealing material 1 fed out by the sealing material feed roller 35 to a predetermined size, and the cut sealing material 1 is directed toward the sticking roller 31. It has a cutter roller 37 having an air blowing hole 36 for blowing out, and is attached to the cut sealing material 1 which is provided in the vicinity of the outer periphery of the sticking roller 31 and is moved while being vacuum-held by the sticking roller 31. It has an adhesive application device 38 adapted to apply the agent 5. As shown in FIG. 5, the adhesive applying device 38 has a first applying roller 39 and a second applying roller 40 which are rotatably driven so as to be in contact with the outer periphery of the sticking roller 31, and It has combs 41, 42 respectively provided between the rollers 39, 40 and the sticking roller 31, and the rollers 39, 40 are provided in a rolling contact state with the rollers 39, 40. Adhesive roller for transferring adhesive 5
An adhesive tank 44 for supplying the adhesive 5 to the adhesive roller 43 is provided.

Since the sealing material covering device 30 is configured as described above, the carton 2 continuously supplied from the previous step is separated by one by the separating device (not shown) arranged in front of the device 30. It is supplied to the sealing material covering device 30 by the transfer device 20 which is placed at a constant interval with each timing and which is arranged subsequent to the separating device, and when detected at a predetermined position during the transfer, The sealing material feed roller 35 operates, the sealing material 1 set in the original sealing material roller set station 34 is fed out, and at the same time, the cutter roller 37 for cutting operates and the sealing material 1 is cut to a predetermined size. . The sealing material 1 cut to a predetermined size is prevented from being wound around the cutter roller 37 due to static electricity or other adverse effects due to the air blow of the air blowing hole 36, and is completely stuck to the sticking drum 31.
Transferred to.

The width of the sealing material 1 is set to be about 20 mm larger than the lateral width of the carton 2, and the length of the sealing material 1 after cutting is set to be about 20 mm longer than the vertical width of the carton 2. . Further, the carton 2 is guided by the transfer device 20 by the guides 21a and 21b on the left and right in the traveling direction.
Further, it is conveyed while being restricted by the attachments 23a and 23b in the front and rear of the traveling direction.

The sealing material 1 transferred to the sticking drum 31 is vacuum-held on the outer periphery of the sticking drum 31, and is shaped to correspond to the opening edge portion 4 of the carton 2 by the adhesive applying device 38 during the progress.
That is, the adhesive 5 is applied in a V shape. That is, the first
By the coating roller 39, as shown in FIG.
The adhesive 5 is applied to a portion other than the portion corresponding to the comb 41 for preventing the sealing material from being entangled in the first application roller 39, and then, by the second application roller 40, as shown in FIG. 7 (b), The adhesive 5 is applied only to the unapplied portion of the first application roller 39.
Was applied, and as a result, as shown in FIG. 7 (c),
The adhesive 5 is applied in a mouth shape.

The sealing material 1 to which the adhesive 5 is applied is held in vacuum up to the lowest point 31 'of the application drum 31, that is, the point where it comes into contact with the carton 2, but after that, the vacuum state is released. And
Opening edge 4 of the carton 2 of the sealing material 1 from the lowest point 31 '
The transfer to is started. The sealing material 1 whose transfer has started is
Since the peripheral speed of the sticking drum 31 and the round belt 33 are set to the same speed as the conveying speed of the carton 2, the sticking drum 31 is reliably separated from the sticking drum 31 by the round belt 33 and lightly until the round belt return roller 32. It is pressed down and transferred to the carton 2 (see FIG. 8).

Next, the pressing device 50 shown in FIG. 9 will be described. This device 50 is used in the carton 2 with respect to the sealing material covering device 30.
Has a feeding chain 51 arranged adjacent to each other in the conveying direction and rotatably driven in synchronization with the conveying speed of the carton 2, and at the same distance as the conveying interval of the carton 2 on the conveying chain 51. A plurality of sponge caterpillar belt devices 52 are provided, further comprising a plurality of pressing elastic bodies (pressing sponges) 53 provided in each of these sponge caterpillar belt devices 52,
The pressing elastic body 53 has a downward holding portion at its tip as shown in FIG.

Since the pressing device 50 is configured as described above,
As shown in FIG. 9 and FIG. 10, the sealing material 1 transferred to the carton 2 as described above is positioned above the carton 2 which is conveyed in synchronization with the conveying speed of the carton 2. Also, the sponge 53 of the caterpillar belt device 52 with a sponge is pressed against the opening edge portion 4 of the carton 2, and at the same time, by utilizing the shape and elasticity of the sponge 53,
Part 1a outside the opening edge 4 of the carton 2 of the sealing material 1
Is bent in the direction along the rectangular tubular body portion 2a of the carton 2, and as a result, the sealing property of the opening edge portion 4 of the carton 2 can be ensured.

Further, explaining the lid covering device 70 shown in FIG. 11,
This device 70 is provided with a chute 71 that is inclined at a position adjacent to the pressing device 50 in the transport direction of the carton 2 so that the outlet side is low and that sequentially supplies the lid 6, and the chute 71. The pressure roller device 72 is disposed adjacent to the traveling direction of the carton 2.

Since the lid covering device 70 is configured as described above, the cartons 2 sealed by the sealing material 1 are supplied one by one from the chute 71 when detected by a detector (not shown). A lid that stands by at the chute outlet portion 71a (a top plate portion having a shape corresponding to the shape of the opening portion 3 of the container 2 is provided so as to hang down from the periphery of the top plate portion, and the sealing material 1 is bent. The lid 6 having four side plate portions continuously provided to cover the portion is hooked on the front side of the moving carton 2 to cover the lid, and finally the pressure roller device 72 is pressed.
By this, the entire top surface of the carton 2 is crimped, and the lid 6 is put on as shown in FIG.

As described above, the embodiment of the container sealing method of the present invention has been described together with a part of an example of the apparatus used for carrying out the embodiment, but the container sealing method of the present invention is not limited to the above embodiment, and for example, The shape of the opening edge of the carton may be a polygon other than a quadrangle or any other shape. In that case, if the shape of the sealing material and the adhesive application shape are adapted to the shape of the opening edge of the carton. good.

〔The invention's effect〕

Since the container sealing method of the present invention is configured as described above, the sealing material can be securely placed in the opening without being affected by the variation in the height of the container and the stepped portion that may be formed in the opening. Can be adhered to the container, the sealing property of the opening of the container can be improved, the adhesive can be economically used, and the paper seal can be simply and securely pressed by pressing it from above. Since it can be sealed, it has an effect that the sealing work can be easily performed. Moreover, according to the present invention, finally, the opening to which the sealing material is adhered has a lid capable of covering the entire sealing material (having a top plate portion having a shape corresponding to the shape of the opening and The sealing material adhered to the opening is covered with a lid having four side plates connected continuously from the periphery of the top plate portion and covering the bent portion of the sealing material. Is protected by a lid that covers the opening and does not need to be completely bonded in a short time by pressing the pressing elastic body, so an expensive adhesive such as an instant adhesive or a thermoplastic adhesive or those adhesives No additional equipment (heater, etc.) necessary for using the adhesive is required, and the target container can be sealed with an inexpensive emulsion type adhesive.

[Brief description of drawings]

FIG. 1 is a plan view showing a mode in which an adhesive is applied to a sealing material,
FIG. 2 is a sectional view showing a mode in which a sealing material is put on a container, FIG.
The figure is a cross-sectional view showing a mode in which the sealing material is pressed from the outside to be bonded to the opening edge portion of the container, and FIG. FIG. 5 is a side view showing an encapsulating material covering device to be covered with the adhesive, FIG. 5 is a side view showing an adhesive applicator forming a part of the encapsulating material covering device, and FIG.
FIG. 7 is a schematic diagram showing the order of applying the adhesive to the sealing material,
FIG. 8 is a perspective view showing a state in which the opening of the carton is covered with a sealing material (shown by a chain double-dashed line in the figure), and FIG. 9 shows a pressing device for pressing the sealing material covered in the opening of the carton. A side view, FIG. 10 is a cross-sectional view showing a state in which the sealing material covered in the opening of the carton is being pressed by the above-mentioned pressing device, and FIG. 11 is a view in which the opening of the carton is sealed with the sealing material and the outside is covered with a lid. FIG. 12 is a side view showing the lid covering device, and FIG. 12 is a perspective view showing a state in which a lid is put on the outside of the carton with an opening sealed by a sealing material, with a part thereof broken away. 1 …… Sealant 2 …… Container (carton) 2a …… Square tubular body 3 …… Opening 4 …… Opening edge 5 …… Adhesive 53 …… Pressing elastic body

Claims (1)

[Claims] 1. A method of sealing a container, which seals the opening of a container having an opening provided at least at one end of a rectangular tubular body, wherein a sheet-shaped sealing material that seals the opening is provided with the opening. After applying an emulsion type adhesive to the shape corresponding to the shape of the opening edge of the part, the sealing material is covered on the opening, and then, with a pressing elastic body having a downward pressing portion, By pressing the opening edge of the container from the upper part of the sealing material by locating the restraining part on the outer side of the body of the container, the sealing material is bent in the direction along the rectangular tubular body and the container is formed. Of the top plate part having a shape corresponding to the shape of the opening, which is adhered to the opening edge and the surface of the rectangular tubular body along the opening edge, and the opening of the container to which the sealing material is adhered. And has a hanging line from around the top plate part. By sealing method containers, characterized in that covering lid having a side plate portion which is four continuously provided in the bent portion to cover the sealing material.