JPH09132202A - Method and device for packaging article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the generation of defective products due to a slip of a cutting position, and reduce the perfect defective of the machine by a method wherein the opening end of a packaging bag is pinched, and an article is pushed into the bag, and a part between the article and the pinching position is simultaneously bonded and welded. SOLUTION: A plurality of articles are housed in a gusset bag 2 made of a thermoplastic resin, and the bags 2 are continuously carried on a belt 31 of a carrying means 3, and the opening end 2a of the gusset bag 2 is pinched by catching belts 41, 42. Then, the opening end 2a of the gusset bag 2 is introduced to a gap between plates 51, 52, and the gusset bag 2 is further carried. Then, the gusset bag 2 is made to pass tilted parts 51a, 52a, and the article is pushed into the deep end of the gusset bag 2, and the distance between the pinching position and the article in the gusset bag 2, is increased. Then, the gusset bag 2 is introduced between a heated rotary sealer 61 and an anvil roll 62, and a specified position between the article and the pinching position in the gusset 2 is welded, and at the same time, fused, to complete the packaging of the article.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for packaging articles, and more particularly, a plurality of various shrinkable articles such as sanitary napkins, hygienic articles such as disposable diapers, and daily necessities are contained in a packaging bag. The present invention relates to a method and a device for packaging an article, which are suitable for packaging.

[0002]

As is well known, sanitary napkins, hygienic articles such as disposable diapers, various shrinkable articles such as foods and daily necessities are individually packaged and then housed in a plurality of packaging bags before being supplied to the market. doing.

When packaging such articles, a packaging bag made of a thermoplastic resin, which is a so-called gusset bag, is mainly used. Then, in the packaging of articles by this gusset bag, first, the opening of the flat-folded gusset bag is opened, and after storing a plurality of articles in the gusset bag through the opening, the opening in the gusset bag is performed. After sandwiching the end portion, then pushing the article into the back of the gusset bag to shrink the article, widening the distance from the holding position to the article in the gusset bag, and then between the holding position and the article The space was heat-bonded with a band sealer. Then, after that, the rotary cutter was used to cut the end portion outside the bonded portion. The thus-produced package has a tightness and a compactness because a predetermined tension is applied to the gusset bag as the contracted state of the article in the gusset bag is recovered.

[0004]

By the way, in the above-described conventional packaging method for articles, since the adhering step and the cutting step are separate steps, when the gusset bag meanders during the transportation by the transportation means, The bonded part bonded by the band sealer sometimes deviated from the cutting position of the rotary cutter. Then, when it is displaced from the adhesive portion to the side of the holding position, the end portion 20a remains irregular and has a width equal to or larger than a desired width as in the packaging body 20 ′ shown in FIG. 4, resulting in a poor appearance. Was there. In addition, when it is displaced from the adhesive portion to the article side, packaging cannot be performed. And
In any case, it was judged as a defective product, and the mechanical failure rate was inevitably high.

Therefore, it is an object of the present invention to provide an article packaging method and apparatus capable of suppressing the occurrence of defective products due to the deviation of the cutting position and reducing the mechanical defect rate.

[0006]

According to a first aspect of the present invention, an opening end of a thermoplastic resin packaging bag having an opening and having articles housed therein is held, and then the opening end is sandwiched. , Pushing the article into the back of the packaging bag to widen the distance from the sandwiching position to the article in the packaging bag, and then adhesively fusing the article and the sandwiching position to package the article. The above object is achieved by providing a method for packaging an article characterized by:

[0007] The invention described in claim 2 of the present invention provides
As a device capable of suitably carrying out the method of packaging an article according to claim 1, a transporting means for transporting a thermoplastic resin packaging bag having an opening and having an article stored therein, and the above-mentioned packaging bag. Clamping means for clamping the open end, pressing means for pushing the article into the back of the packaging bag to shrink it, and adhesive fusing means for adhesively fusing between the clamping position and the article in the packaging bag, The present invention provides a packaging device for articles, comprising: suction discarding means for sucking and discarding the end portion of the packaging bag that has been fused by the adhesive fusing means.

In the method of packaging an article according to the first aspect of the present invention, the open end of the packaging bag is clamped. Then, the contained article is pushed into the back of the packaging bag and contracts, and after the distance from the sandwiching position to the article in the packaging bag is widened, the adhesive fusing between the article and the sandwiching position. Then, the above article is packaged.

In the article packaging apparatus according to claim 2 of the present invention, first, the opening end of the packaging bag conveyed by the conveying means is clamped by the clamping means, and then the article is compressed by the pressing means. It is pushed into the back of the packaging bag and contracted. Next, the sandwiching position of the packaging bag and the article are adhesively fused by the adhesive fusion cutting means. Then, the end portion of the packaging bag melted and cut by the adhesive melting and cutting means is sucked and discarded by the suction and discarding means. After the adhesive fusing, as the article in the packaging bag recovers from the contracted state, it becomes a compact package excellent in appearance.

[0010]

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

FIG. 1 and FIG. 2 show an embodiment of an article packaging apparatus according to the present invention. In the figure, reference numeral 1 is a packaging device, 2 is a gusset bag (packing bag), and A is an article.

As shown in FIG. 1, the packaging device 1 is
Conveying means 3 for conveying the thermoplastic resin gusset bag 2 having an opening (not shown) and containing the article A therein.
A holding means 4 for holding the open end 2a of the gusset bag 2, a pressing means 5 for pushing the article A into the back of the gusset bag and contracting it, and a holding position X of the gusset bag (catching described later). Adhesive fusing means 6 for adhesive fusing between the inner edge of the belt 61 and the article A, and suction discarding means 7 for abandoning the end of the gusset bag 2 fused by the adhesive fusing means 6 (FIG. 2).
Reference).

The transfer means 3 is a drive source (not shown).
And a belt 31 driven by this drive source, which conveys the gusset bag 2 containing the article A on the belt 31 at predetermined intervals at a predetermined speed. .

The holding means 4 has a pair of endless catching belts 41, 42 arranged vertically (partially cut out in FIG. 1), and the catching belts 41, 42 are wound. Roller 43 and roller 4
And a drive source (not shown) for driving 3. The catching belts 41 and 42 are arranged laterally of the belt 31 and substantially parallel to the belt 31, and in the catching belts 41 and 42, leaf springs (not shown) are arranged at predetermined intervals. ) Are provided, a receiving roll (not shown) for receiving these leaf springs is provided at predetermined intervals. Each catching belt 4
The reference numerals 1 and 42 rotate in mutually opposite directions, and the rotation speed thereof is set to the same speed as that of the belt 31. Then, the open end portion 2a of the gusset bag 2 to be conveyed is sandwiched by a predetermined section. Here, since the open end 2a of the gusset bag 2 is sufficiently biased by the leaf spring when being guided between the catching belts 41 and 42, the article A is pressed to the opposite side as described later. Even if it contracts, it does not come off easily. Also, catching belt 4
The materials of Nos. 1 and 42 are preferably neoprene rubber and natural rubber in order to enhance the clamping force between them, and their width is 0.
It is preferably about 5 cm to 3.0 cm.

The pressing means 5 is mainly composed of a pair of plates 51 and 52 arranged vertically between the belt 31 and the catching belt 41 in a substantially vertical manner. These plates 51 and 52 are arranged at a predetermined interval so that the open end 2a of the packaging bag 2 can pass through.
The rear end portions of the plates 51 and 52 are formed so as to gradually spread upward and downward, respectively, and the gusset bag 2 is flattened so that it can be easily guided to the gap between the plates 51 and 52. In addition, a water passage (not shown) through which cooling water is passed is formed in the plates 51 and 52 so as to suppress a temperature rise due to heat radiation from a rotary sealer 61 described later. The plates 51 and 52 are preferably made of steel or stainless steel.

Further, inclined portions 51a and 52a which are inclined inward at a predetermined angle are formed at intermediate portions in the longitudinal direction of the plates 51 and 52 so that a part thereof is located on the belt 31. And the above catching belt 4
The gusset bag 2 sandwiched between the first and the second 42 is the inclined portion 51.
a, 52a, the article A housed in the gusset bag 2 is further pushed into the back of the gusset bag 2 to be contracted, and between the holding position X and the article A in the gusset bag 2. Is widened, and a sufficient area for adhesive fusing by the rotary sealer 61 described later can be secured. The inclination angle of the inclined portions 51a and 52a is 30 ° or less with respect to the moving direction of the belt 31 and the gusset bag 2 so as not to compress the article A rapidly (see FIG. 2). ) Is 50 cm to 150 cm
It is desirable to be about. Also, the inclined portions 51a and 52a
Further, the distance L ′ (see FIG. 2) between the front portions 51b, 52b and the holding position X is not particularly limited,
It is preferably about 15 cm to 50 cm.

The adhesive fusing means 6 mainly comprises a rotary sealer 61 rotatable about a horizontal axis, an anvil roller 62 arranged below the rotary sealer 61, and a temperature controller (not shown). There is. A ring-shaped heater 61a whose temperature can be set to a desired temperature is arranged on the peripheral portion of the rotary sealer 61. The heater 61a is made of a material such as SKH material, and has a tip portion in the circumferential direction formed at an acute angle.
Then, the temperature of the heater 61a is set to a predetermined temperature by the temperature controller, and the anvil roller 6 is
2 and the opening end 2a of the gusset bag 2 is 0.5 m
It is designed to be welded with a width of about m to 2.0 mm and to be able to be immediately fused. The rotary sealer 61 and the anvil roller 62 are used for the catching belt 4 described above.
1 and 42 and the plates 51 and 52, and in front of the inclined portions 51a and 52b. Then, in a state where the article A is contracted in the gusset bag 2 by passing through the inclined portion 51a, a predetermined position on the open end 2a side of the gusset bag 2 passing between the rotary sealer 61 and the anvil roller 62 is set. It is designed to be adhesively fused. The rotation speed of the rotary sealer 61 is not particularly limited, but is preferably about 1 to 5 rpm.

The suction / disposal means 7 has a casing-like main body 70 having an intake (not shown), a negative pressure source (not shown), and a waste pipe 71 leading to the negative pressure source. It is provided with a configuration. The main body portion 70 is arranged further forward of the adhesive fusing means 6, and the end portion of the gusset bag 2 fused by the adhesive fusing means 6 has a gusset bag 2, a rotary sealer 61, or an anvil roller 62. It is designed so that it can be sucked and discarded immediately after melting without sticking to the like.

Next, the procedure of the method of packaging an article according to the present invention will be described based on the implementation by the packaging device 1.

First, the flat-folded gusset bag 2 is unfolded to open the opening, and a plurality of articles A are stored in the gusset bag 2. Then, this is conveyed by a conveyer such as a conveyor,
The sheet is transferred onto the belt 31 of the conveying means 3 in a predetermined direction. The procedure from the storage of the article in the gusset bag 2 to the delivery can be the same as the conventional procedure.

Next, 10 cm to 50 c on the belt 31.
The sheet is continuously conveyed forward in the conveying direction at a conveying speed of about m / sec, and the open end 2a of the gusset bag 2 is clamped by the catching belts 41 and 42. And gazette bag 2
The sheet is conveyed further forward in the conveying direction while being sandwiched.

Next, the open end 2a of the gusset bag 2 is guided into the gap between the plates 51 and 52, and is further conveyed forward in the conveying direction. Then, while passing the inclined portions 51a and 52a, the article A is pushed into the back of the gusset bag 2 to shrink the article A, and the distance from the holding position X in the gusset bag 2 to the article A is widened, Further, it is transported forward in the transport direction.

Then, the heater 61a is set in advance at 200.degree.
It is guided between the rotary sealer 61 heated to 300 ° C. and the anvil roll 62, and the predetermined position between the article A and the holding position X in the gusset bag 2 is welded and melted, and the packaging of the article A is performed. To complete. After the adhesive fusing, the article A in the gusset bag 2 is separated from the plates 51 and 52 as the article A in the gusset bag 2 is recovered from the contracted state, and the end 20a is accurately cut as shown in FIG. An excellent and compact package 20 is produced.

As described above, according to the article packaging method of the present embodiment, since the adhesive fusing means performs the fusing simultaneously with the adhering, the conventional adhering (fusing) and the cutting can be performed in separate steps. In comparison, the mechanical defect rate can be suppressed low. Further, since the packaging device 1 can be made small in scale, and the maintenance work area for the worker can be widened accordingly, maintenance is easier to perform than the conventional device. .

In the method of packaging an article of the present invention, the transport of the packaging bag by the transport means may be continuous or intermittent.

Further, in the method of packaging an article of the present invention,
The packaging bag used is not particularly limited as long as it is made of a thermoplastic resin, but those made of low density polyethylene, linear low density polyethylene, high density polyethylene, or polypropylene are preferably used.

In the method for packaging an article of the present invention, the article to be contained in the packaging bag is not particularly limited as long as it can be contracted, but a soft sanitary article such as a sanitary napkin or a disposable diaper, Examples include daily necessities such as kitchen paper.

The article packaging apparatus according to the present invention is not limited to the above embodiment, and its size, shape and the like can be appropriately changed without departing from the object of the present invention.

For example, in the packaging device 1 of the above embodiment,
Although the conveyer 30 is used as the conveyer 3, the conveyer is not limited to this, and other conveyer such as a roller conveyer or a belt conveyer may be adopted.

It goes without saying that the method of packaging an article according to the present invention is not limited to the implementation by the packaging device 1 of the above embodiment.

[0031]

EFFECTS OF THE INVENTION According to the method and apparatus for packaging articles of the present invention, the following effects can be obtained. According to the method of packaging an article of the first aspect, it is possible to suppress the mechanical defect rate to a low level as compared with the related art.

According to the article wrapping apparatus of the second aspect, it is possible to preferably carry out the method of wrapping articles having the above-mentioned effects, and also to make the apparatus scale smaller than the conventional one.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of an article packaging apparatus according to the present invention.

FIG. 2 is a plan view of the article packaging apparatus of the embodiment.

FIG. 3 is a perspective view showing a package manufactured by the packaging device.

FIG. 4 is a perspective view showing a package manufactured by a conventional article wrapping apparatus.

[Explanation of symbols]

 1 Packaging Device 2 Gazette Bag (Packing Bag) 2a Open End 3 Conveying Means 4 Clamping Means 5 Pressing Means 6 Adhesive Fusing Means 7 Suction Disposal Means A Article X Clamping Position

Claims (2)

[Claims] 1. An opening end 2a of a thermoplastic resin packaging bag 2 having an opening therein and in which an article A is housed is clamped, and then the article A is pushed into the back of the packaging bag 2. After widening the distance from the sandwiching position X to the article A in the packaging bag 2, the article A and the sandwiching position X are adhesively fused to package the article A. Packaging method. 2. A transporting means 3 for transporting a thermoplastic resin packaging bag 2 having an opening and containing an article A therein.
A holding means 4 for holding the open end 2a of the packaging bag 2, a pressing means 5 for pushing the article A into the back of the packaging bag 2 to shrink it, the holding position X of the packaging bag 2 and the holding position X. The article is characterized by comprising an adhesive fusing means 6 for adhesive fusing with the article A, and a suction discarding means for aspirating and discarding the end portion of the packaging bag 2 fused by the adhesive fusing means 6. Packaging equipment.