JPH05112317A - Packaging of mat-like article - Google Patents

Abstract

PURPOSE:To contrive cost reduction by a method wherein, when a stack of throw-away articles such as gas mat for use on a gas range is packaged, a disk-like packaging sheet is used on either of the upper or lower surfaces of the gas mat, a film-like packaging sheet is used on the other surface thereof and their peripheral edges are fused together. CONSTITUTION:A disk-like packaging sheet 18 is fitted into a retaining frame 12 on a conveyor belt 11 and its flange is laid on the border of the retaining frame 12. A mat-like article 19 consisting of a stack of a plurality of gas mats is placed on the disk-like packaging sheet 18. When the mat-like article 19 is brought under a film-like packaging sheet 13 by a moving conveyor belt 11, the conveyor belt 11 is stopped and the film-like packaging sheet 13 is placed over the mat-like article 19 along the contour of its upper surface by a closely attaching means. More specifically, after the film-like packaging sheet 13 is pressed against the mat-like article 19 by a press die 21, a heat sealing die 23 is lowered to heat the sheet 13 to be fused thereon and the sheet 13 is cut off along the fused lines.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of packaging a mat-like product having raised portions at the top and bottom such as a disposable gas mat made of an aluminum sheet to be placed on a gas range for display and sale. Regarding

[0002]

2. Description of the Related Art Conventionally, for example, a gas mat product is packaged by sandwiching a plurality of sheets with a packaging sheet from above and below.

That is, as shown in FIG. 7, the gas mat 1
By forming an aluminum sheet, the flange 2
And a boss portion 4 that bulges downward from the flange, a boss portion 4 that bulges above the dish portion 3 at the center, and a central opening portion 5 that is opened at the center of the boss portion 4.

Therefore, a pair of upper and lower packaging sheets 6 and 7 are used for packaging such a gas mat product. Both packaging sheets 6 and 7 are of the same shape and size,
A flange 2a formed by vacuum forming a shape-retaining vinyl chloride sheet along the flange 2 of the gas mat 1, a dish portion 3a along the dish portion 3 and the boss portion 4 Raised circular portion 4 that substantially matches
a and.

Thus, conventionally, the packaging sheets 6 and 7 are polymerized on the upper and lower sides of a product 8 in which a plurality of gas mats 1 are laminated,
The commodities 8 are packaged by bonding and holding the peripheral edges of the packaging sheets 6 and 7 to each other with cellophane tape.

[0006]

In the conventional packaging method described above, a pair of upper and lower packaging sheets 6 and 7 formed by vacuum forming a vinyl chloride sheet must be used.
The cost cost is relatively high, and the ratio of packaging cost to inexpensive products is high.

As described above, during the packaging work,
Basically, the packaging sheets 6 and 7 are polymerized on the top and bottom of the product 8 and the cellophane tape is attached, so that it is necessary to rely on manual work, and therefore the efficiency cannot be improved,
Not suitable for packaging large quantities of goods.

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a method for packaging mat-like products which solves the above-mentioned problems.
The place configured as the first means, a mat-shaped product having up and down ridges, a dish-shaped packaging sheet that substantially conforms to the lower surface shape of the mat-shaped product, and a step of preparing a film-shaped packaging sheet, The step of placing the mat-shaped product on the dish-shaped packaging sheet, the step of disposing the film-shaped packaging sheet above the mat-shaped product, and the step of covering the film-shaped packaging sheet along the upper surface shape of the mat-shaped product. It is composed of a step and a step of welding the film-shaped packaging sheet to the peripheral edge of the dish-shaped packaging sheet on the outer periphery of the mat-shaped product and dividing the film-shaped packaging sheet along the welding line.

Further, the present invention is configured as a second means, in which a mat-like product having ridges at the top and bottom and a dish-like packaging sheet which substantially conforms to the lower surface shape of the mat-like product are continuously fed out. And a film-shaped packaging sheet to be rolled up, a step of placing the dish-shaped packaging sheet on a conveyor, a step of placing a mat-shaped product on the dish-shaped packaging sheet, and the mat-shaped product A film-like packaging sheet is placed above, and a step of covering the film-like packaging sheet along the upper surface shape of the mat-like product by the adhesion means, and the film-like packaging sheet at the outer periphery of the mat-like product. And the process of welding and cutting to the periphery.

According to the third aspect of the present invention, in the second aspect, the contacting means comprises a press die which substantially conforms to the upper surface shape of the mat-like product, and the press die forms a film-like package. The point is that the sheet is pressed against the upper surface of the mat-like product and the film-like packaging sheet is heated to be molded along the upper surface shape of the mat-like product.

Further, the fourth aspect of the present invention is that a mat-like product having upper and lower ridges and a film-like lower sheet continuously unwound and wound along the lower surface of the mat-like product. And a step of preparing a film-shaped upper sheet that is continuously fed and wound along the upper surface of the mat-shaped product, and sandwiching the mat-shaped product from above and below, sandwiching the upper sheet and the lower sheet in a sandwich shape. While pressing the upper sheet and the lower sheet on the upper surface and the lower surface of the mat-shaped product by a press die that generally matches the upper surface shape and the lower surface shape of the mat-shaped product,
A point that includes a step of heating the upper sheet and the lower sheet to form along the upper surface and the lower surface of the mat-shaped product, and a step of welding and melting the upper sheet and the lower sheet to each other on the outer periphery of the mat-shaped product It is in.

[0012]

Embodiments of the present invention will be described in detail below with reference to the drawings. In the following description, the terms above or below are based on the drawings, but the present invention reverses the mat-like product to be packaged from the illustrated embodiment, that is, the mat-like product is turned upside down. It is possible to change the design so that the product can be packaged in a fallen posture.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
Through FIG.

In FIG. 1, on the conveyor belt 11 which is moved intermittently, holding frames 12 are arranged at regular intervals and at regular intervals.
Are lined up. Above the predetermined position of the conveyor path by the conveyor belt 11, the film-like packaging sheet 13 is unwound and wound in a direction intersecting the conveyor path.
Are arranged. That is, this film-like packaging sheet 1
3 constitutes a continuous belt-like sheet which is intermittently moved from the feeding roll 14 to the winding roll, and nip rolls 16 and 1
By passing through 7, it is arranged in the vicinity of and parallel to the upper surface of the conveyor belt 11.

As shown in FIG. 4A, the holding frame 12 is preferably divided into a plurality of divided bodies 12a, 12b, 12c in the conveying direction F of the conveyor belt 11.
Consists of. Therefore, as shown in FIG. 4 (B), when the conveyor belt 11 passes back through the winding portion for the drive roller or the driven roller 11a, the divided bodies 12a, 12b, 1
2c are mutually refractable and are configured flexibly.

As shown in FIG. 1, for the packaging method according to the present invention, a dish-shaped packaging sheet 18 is prepared in addition to the film-shaped packaging sheet 13. Further, as a matter of course, the mat-like product 19 to be packaged is prepared.

In the illustrated example, the mat-like product 19 is
The gas mat 1 described above with respect to the conventional example is shown, and has the flange 2, the dish portion 3, the boss portion 4, and the central opening 5 as shown in FIG. 7.

The dish-shaped packaging sheet 18 is formed into a shape that substantially matches the shape of the lower surface of the mat-like product 19.
This is the same as the packaging sheet 7 described above with respect to the conventional example. Therefore, the flange 2a and the dish 3 as shown in FIG.
a and a raised circular portion 4a, which allows the lower surface of the gas mat 1 to be fitted. However, the material of the dish-shaped packaging sheet 18 is preferably vacuum-molded using another resin sheet because a conventional vinyl chloride sheet has a pollution problem of generating chlorine gas during combustion.

In a preferred embodiment of the present invention, the film packaging sheet 13 and the dish packaging sheet 18 are
In order to enable mutual welding, which will be described later, resin materials of the same quality are used, and for example, polypropylene or polyethylene can be selected.

Each step of the packaging method according to the first embodiment will be described in order with reference to FIGS. 1 and 2.

The dish-shaped packaging sheet 18 is fitted into the holding frame 12 on the conveyor belt 11. At this time, as shown in FIG. 2A, in the dish-shaped packaging sheet 18, the dish portion 3 a is in contact with the upper surface of the conveyor belt 11 and the flange 2 a is superposed on the frame of the holding frame 12.

Next, a mat-shaped product 19 formed by stacking a plurality of gas mats 1 is placed on the dish-shaped packaging sheet 18 held by the holding frame 12. At this time,
As shown in (B), the mat-shaped product 19 is fitted to the dish-shaped packaging sheet 18 so that the mat-shaped product 19 is substantially matched.
The flange 2 of the (gas mat 1) is superposed on the flange 2a of the dish-shaped packaging sheet 18. In this state, the flange 2a of the dish-shaped packaging sheet 18 has a projecting edge 2b that projects more outward than the flange 2 of the gas mat 1.

The conveyor belt 11 is stopped in a state in which the mat-like product 19 is positioned below the film-like packaging sheet 13 by the conveyance of the conveyor belt 11, and the film-like packaging sheet 13 is placed on the upper surface of the mat-like product 19 by the contact means. It is covered along the shape.

In order to configure this contact means, as shown in FIG. 1, a press die 21 driven by an elevating device 20 such as a cylinder is arranged above the film packaging sheet 13, and the press die 21 is arranged. 21 is a mat-like product 19
It is formed in a shape that substantially matches the shape of the upper surface of the (gas mat 1). The press die 21 is provided with a heating means by a heater.

Therefore, as shown in FIG. 2C, when the film-like packaging sheet 13 is pressed against the mat-like product 19 by the press die 21, the space between the dish-like packaging sheet 18 and the film-like packaging sheet 13 is increased. While the air is released in the outer peripheral direction, the film-shaped packaging sheet 13 is molded into a shape along the upper surface of the mat-shaped product 19 while being heated.

Subsequently, during pressing by the press die 21, the film packaging sheet 13 is welded to the peripheral edge of the dish packaging sheet 18, that is, the protruding edge 2b, and the welding line is formed on the outer periphery of the mat-like product 19. The film-like packaging sheet 13 can be divided along the line.

For this reason, as shown in FIG. 1, above the press die 21, there is arranged a downward-facing dish-shaped welding die 23 which is moved up and down by a driving device 22 such as a cylinder. As shown in FIG. 3 (A), a welding surface 23a facing the overhanging edge 2b of the dish-shaped packaging sheet 18 and a welding blade 23b located on the outer peripheral side of the welding surface 23a are formed.

Therefore, as shown in FIG. 2D, when the welding mold 23 is lowered, the film-like packaging sheet 13 is pressed while covering the peripheral edge of the mat-like product 19, and the plate-like packaging sheet 18 is stretched. It is pressed by the projecting edge 2b, where the film-shaped packaging sheet 13 and the projecting edge 2b of the dish-shaped packaging sheet 18 are welded to each other by the welding surface 23a, and furthermore, the film-shaped packaging sheet 13 is fused by the fusing blade 12b. Divide.

Thus, the welding die 23 and the press die 21
When the conveyor belt 11 is made to travel after the conveyor has been raised, the package 24 as shown in FIG. 2 (E) is dropped from the holding frame 12 at the winding portion of the conveyor belt 1.

Incidentally, in the film-like packaging sheet 13, a part of a continuous strip-shaped sheet is cut out by the welding mold 23, but the remaining strip-shaped sheet remains as a continuous strip-shaped sheet, so the cut-out portion is wound. The sheet is wound up on the take-up roll 15 and a new sheet portion is fed out from the feed-out roll 14 to prepare for the next packaging operation. After that, the above-described work is repeated using the holding frame 12 on the conveyor belt 11.

(Modified Embodiment) In the above first embodiment,
Various modified embodiments can be constructed.

For example, in the step of covering the mat-like product 19 with the film packaging sheet 13, that is, in the step shown in FIG. 2 (C), when the air bleeding described above is not sufficient, a separate air bleeding means may be provided. It is possible. For example, between the overhanging edge 2b of the dish-shaped packaging sheet 18 and the film-shaped packaging sheet 13, a vacuum suction nozzle that is movable back and forth with respect to the side edge portion of the mat-shaped product 19 is arranged and forced. By removing the air, the film-like packaging sheet 13 can be made to fit the upper surface shape of the mat-like product 19 in a suitable manner.

Further, the non-welded portion 25 can be partially formed in advance on the projecting edge 2b of the dish-shaped packaging sheet 18. The non-welding portion 25 is configured by applying or printing a non-welding agent such as printing ink or varnish on the overhang edge 2b. According to this configuration, the film packaging sheet 1
Since 3 is not welded to the non-welded portion 25, when the consumer opens the packaging body 24 and takes out the mat-like product 19, the unwelded portion of the film packaging sheet 13 should be picked and the welded portion should be peeled off. Will be easier.

(Second Embodiment) FIG. 5 shows a second embodiment of the present invention.
And shown in FIG.

According to the second embodiment of the present invention, the packaging material for covering the upper and lower sides of the mat-like product 19 is a film-like packaging sheet. That is, with respect to the mat-like product 19, a film-shaped lower sheet 31 that is continuously fed and wound along the lower surface, a film-shaped upper sheet 32 that is continuously fed and wound along the upper surface, and both sheets. Between 31 and 32, the mat-like product 19 held by the holder 33
(Gas mat 1) is prepared.

As shown in FIG. 5 (A), the upper mold 34 and the lower mold 3 are vertically arranged with the pair of sheets 31 and 32 interposed therebetween.
5 are arranged, and these upper and lower molds form a heat press mold with a built-in heater.

The upper mold 34 forms a pressing surface that substantially matches the shape of the upper surface of the mat-like product 19, and the center mold 34a.
And a ring mold 34b, and the center mold 34a and the ring mold 34b are independently lifted and lowered by a lifting device such as a cylinder.

The lower mold 35 forms a pressing surface that substantially matches the shape of the lower surface of the mat-like product 19, and the center mold 35a.
And a ring die 35b, and the center die 35a and the ring die 35b are independently moved up and down by an elevating device such as a cylinder.

Each step of the packaging method according to the second embodiment will be described in order with reference to FIGS. 5 and 6.

As shown in FIG. 5A, the mat-like product 19
As shown in FIG. 5 (B), the center molds 34a,
a is moved forward to sandwich and hold the film-shaped upper sheet 32 and the lower sheet 31 above and below the mat-shaped product 19. In this state, the mat-like product 19 has a pair of center molds 34.
Since it is held by a and 35a, the holder 33 is retracted and separated from the mat-like product 19.

Then, as shown in FIG. 6, the upper and lower molds 34,
The ring molds 34b and 35b of 35 are advanced to cover the upper and lower surfaces of the mat-like product 19 with the film-like upper sheet 32 and the lower sheet 31. As a result, the upper and lower molds 34,
Heat pressing is performed by 35, and the upper sheet 32 and the lower sheet 31 are formed so as to be along the upper surface and the lower surface of the mat-like product 19.

Each ring mold 34b, 3 of the upper and lower molds 34, 35
Since 5b includes welding surfaces 34c and 35c for welding the upper and lower sheets 32 and 31 to each other and fusing blades 34d and 35d, the upper and lower sheets 32 and 31 are separated as shown in FIG. The packaging of the mat-like product 19 is completed.

Thereafter, in the reverse order of the above, first the ring type 3
4b and 35b are retracted, and the holder 33 is advanced in this state to hold the package, and subsequently,
After retracting the center molds 34a and 35a, the holder 33
Remove the package from. After that, the same work as described above may be repeated.

[0044]

According to the present invention as set forth in claims 1 to 3, conventionally, a pair of upper and lower dish-shaped packaging sheets are required, whereas the dish-shaped packaging sheet 18 is used only on one of the upper and lower sides and the other. Since the inexpensive film-like packaging sheet 13 is used for the above, the cost cost for packaging can be significantly reduced.

Above all, since it enables automatic packaging, it greatly improves the efficiency as compared with the conventional manual packaging, and a large number of products can be packaged quickly in a short time. It is possible to tighten.

According to the present invention, since the film-like packaging sheet 13 is formed along the surface of the mat-like product 19 and molded and covered, the product does not rattle during packaging, and the gas mat 1 Such soft products can be preferably packaged without impairing the shape retention.

According to the fourth aspect of the present invention, since both the upper and lower packaging materials can be constituted by the film-like sheets 31 and 32, the cost cost for packaging can be further reduced. Moreover, since the film-like sheets 31 and 32 are formed along the upper and lower surfaces of the mat-like product 19 at the time of packaging, there is no need to previously form the dish-like packaging sheet as in the conventional case, which contributes to cost reduction. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a sectional view sequentially showing each step of the first embodiment of the present invention.

FIG. 3 shows details of the first embodiment of the present invention,
(A) is an enlarged cross-sectional view showing a welding type welding surface and a cutting blade,
(B) is a partially cutaway perspective view showing a non-welded portion of the dish-shaped packaging sheet.

FIG. 4 shows details of the first embodiment of the present invention,
(A) is a perspective view showing a holding frame on a conveyor belt,
(B) is a side view showing a state in the winding portion.

FIG. 5 is a cross-sectional view showing a second embodiment of the present invention, in which (A) shows a state in which the upper and lower molds are opened with a mat-shaped product sandwiched therebetween;
(B) is a cross-sectional view showing a state in which the center mold of the upper and lower molds is closed.

FIG. 6 is a sectional view showing a second embodiment of the present invention and showing a state in which the upper and lower molds are completely closed and the packaging is completed.

FIG. 7 is a perspective view showing a conventional method for packaging mat-like products.

[Explanation of symbols]

 1 Gas Mat 2a Flange 2b Overhanging Edge 3a Plate Part 4a Raised Circular Part 11 Conveyor Belt 12 Holding Frame 13 Film Packaging Sheet 18 Dish Packaging Sheet 19 Mat Product 21 Press Mold 23 Welding Mold 23a Welding Surface 23b Welding Blade 24 Packaging Body 25 Non-welded portion 31 Film-shaped lower sheet 32 Film-shaped upper sheet 33 Holding body 34 Upper mold 34a Center type 34b Ring type 35 Lower mold 35a Center type 35b Ring type

Claims (4)

[Claims] 1. A mat-like product having upper and lower raised portions,
A step of preparing a dish-shaped packaging sheet that substantially conforms to the shape of the lower surface of the mat-shaped article and a film-shaped packaging sheet; a step of placing the mat-shaped article on the dish-shaped packaging sheet; A step of disposing a film-shaped packaging sheet, a step of covering the film-shaped packaging sheet along the upper surface shape of the mat-shaped product, and a film-shaped packaging sheet around the periphery of the dish-shaped packaging sheet on the outer periphery of the mat-shaped product. And a step of dividing the film-like packaging sheet along the welding line while welding the mat-like article. 2. A mat-like product having upper and lower raised portions,
A step of preparing a dish-shaped packaging sheet that substantially conforms to the lower surface shape of the mat-shaped product, and a film-shaped packaging sheet that is continuously fed and wound; and a step of placing the dish-shaped packaging sheet on a conveyor. , A step of placing the mat-shaped product on the dish-shaped packaging sheet, and arranging the film-shaped packaging sheet above the mat-shaped product, and covering the film-shaped packaging sheet along the upper surface shape of the mat-shaped product by the adhesion means. A method for wrapping a mat-like product, comprising a step of squeezing and a step of welding and cutting the film-like wrapping sheet around the periphery of the dish-like wrapping sheet on the outer periphery of the mat-like product. 3. The contact means comprises a press die that substantially conforms to the shape of the upper surface of the mat-like product, and the press die presses the film-like packaging sheet against the upper surface of the mat-like product and heats the film-like packaging sheet. The molding is performed so as to follow the shape of the upper surface of the mat-like product.
The method for packaging mat-like products as described in. 4. A mat-like product having upper and lower raised portions,
A step of preparing a film-shaped lower sheet that is continuously fed and wound along the lower surface of the mat-shaped product, and a film-shaped upper sheet that is continuously fed and wound along the upper surface of the mat-shaped product; , The upper and lower sheets are sandwiched from above and below with the mat-shaped product sandwiched therebetween, and the upper sheet and the lower sheet are pressed by a press die that approximately matches the upper surface shape and the lower surface shape of the mat-shaped product, respectively. While pressing on the upper and lower surfaces, heating the upper sheet and the lower sheet to form along the upper and lower surfaces of the mat-like product, and welding the upper and lower sheets to each other on the outer periphery of the mat-like product And a method for packaging mat-shaped products, which comprises a step of melting and cutting.