JPH0885505A - Bag-making/filling/packaging device and packaging bag - Google Patents

Abstract

PURPOSE: To provide a natural folding line at a vertical sealing part being hut-sealed by a vertical sealing process only. CONSTITUTION: An overlapped part Al of a web A is placed between heater surfaces 2a, 2a of vertical sealers 2, 2 which are tilted in a diagonal direction which crosses a radial direction passing the center (1a) of a bag-making cylinder 1. By doing so, the overlapped part A1 is bent in the diagonal direction from the base end, and is hut-sealed while being held in such a manner that the tip of the overlapped part A1 may become closer to the bag-making cylinder 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular shape in which a web is wound around a bag-making cylindrical body, both side edges thereof are overlapped with each other, and the overlapped portions are sandwiched by a pair of vertical sealing machines facing each other. While forming a bag, the tube-shaped web is laterally sealed by sandwiching it with a pair of opposing horizontal sealing machines to form a bag body, and a bag-making cylindrical body is passed through the bag body to fill an article to be encapsulated. A bag-making filling and packaging device, or a web that is intermittently fed out is wound around a bag-making cylinder and the both side edges are overlapped, and the overlapped part is vertically sealed by a vertical sealing machine to form a tube. The tube-shaped web is hung down and sandwiched by a pair of opposed horizontal sealing machines to form a bag body by laterally sealing the same, and a bag-making cylinder is passed through the bag body to fill an article to be encapsulated. A bag filling and packaging apparatus, a packaging bag created in these bag-making filling packaging apparatus.

[0002]

2. Description of the Related Art Conventionally, as a bag-making filling and packaging apparatus of this type, for example, as disclosed in Japanese Patent Laid-Open No. 3-200522, an intermittently fed web is wound around a bag-making cylinder and both side edges thereof are wound. Heat-sealing properties that are formed on the inner surface of the web by stacking them so as to project in the radial direction passing through the center of the bag-making cylinder, and sandwiching this stacking part between the heater surfaces of a vertical sealing machine that is substantially parallel to it. By melting the material that has, it is formed into a tube by sticking it in the feeding direction of the web, so that the vertical seal part that sticks the palm is overlapped with the tubular web along the fixed guide as the web is fed. While being forcibly bent, the bag is made to hang down below the bag-making cylinder, and the tubular web and the vertically-sealed portion forcibly bent before and after filling the enveloped article. The upper and lower ends of the bag body are laterally sealed so as to project in the hanging direction of the web by sandwiching the upper and lower portions respectively with substantially vertical heater surfaces of the lateral sealing machine, and as a result, for example, Japanese Patent Application Laid-Open No. 5-42905. Producing a packaging bag having a vertical sealing portion with excellent adhesive strength, as compared with a case where a stacking portion is sandwiched between a bag forming cylinder and one heater surface as disclosed in Japanese Patent Publication No. There is.

Further, as disclosed in, for example, Japanese Unexamined Patent Publication No. 2-152630, not only the inner surface of the tubular web but also the outer surface is made of a material having a heat-sealing property, and a tubular shape is formed by the projection of a pair of opposed folding pieces. A pair of opposite side surfaces of the web are folded inward and sandwiched by a horizontal sealing machine to form a gusset square bottom type bag body, and immediately after that, before the horizontal sealing part cools. While pushing the bending body forward and bending it at a right angle from the base end of the horizontal seal part, it pushes up slightly to the bag making cylinder side,
The bag is filled with the article to be encapsulated, the bottom of the bag is pressed against the lateral seal portion by its weight, and the lateral seal portion is forcibly cooled by a cooling medium passing through the inside of the bending body to force the lateral seal portion into the bag body. There is a gusset square bottom type packaging bag that can be surely self-standing as a result of being adhered to the bottom surface of the.

[0004]

However, in such a conventional bag-making filling and packaging apparatus and packaging bag as described above, in the case where the vertical seal portion pasted on the palm is forcibly folded and laterally sealed, it is laterally sealed. After that, most of the vertical seals except the horizontally sealed upper and lower ends try to return to the original state before folding, so most of the vertical seals protrude from the bag and the appearance is poor, resulting in a significant commercial value. There is a problem of decrease.

Further, since lateral seal portions located at the upper and lower ends of the bag body respectively project in the axial direction of the tubular web,
The outer dimension of the bag body increases by the amount of these horizontal seal portions, and if the horizontal seal portions can be boxed, for example, in a box with the horizontal seal portion protruding, the boxing dimension becomes large and the transportation cost increases. In order to solve this, if the outer dimensions of the box such as corrugated cardboard are made compact so that only the protruding horizontal seal part is bent in the boxed state, especially the encapsulated article is likely to be damaged such as potato chips. In this case, the load generated when the horizontal seal portion is about to be bent also has a considerable influence on the article to be encapsulated, which causes damage. There is a problem that the parts are bent individually toward either the front side or the back side of the bag body, which causes the appearance to be poor and the commercial value to be reduced. Therefore, there is a type of gusset square bottom type that is bent and cooled before the horizontal sealing portion cools after horizontal sealing, but in the case of this type,
Since the web feeding cannot be started until the folding process and the cooling process are completed after the horizontal sealing, the web feeding stop time becomes long, the high-speed operation cannot be performed, and the operation efficiency is lowered. There is a problem that not only the inner surface but also the outer surface needs a material having a heat-sealing property, and it is necessary to bend and cool the lateral seal portion, resulting in an increase in cost. In order to solve this, it is conceivable to perform these steps simultaneously by bending the horizontal seal part in the post process of the horizontal seal process. In this case, even if the horizontal seal part is bent in the post process, Since the horizontal seal part has already cooled, it will not be able to bond sufficiently even when bent and it will return to the original state before folding, which will make it difficult for the bag body to stand on its own and easily fall down. There is a problem in that the workability is poor when the product is packed in a box, and the aesthetic appearance deteriorates when it is displayed.

In view of such conventional circumstances, the present invention has an object to provide a bag-making filling and packaging apparatus and a packaging bag in which a vertical seal portion formed by a palm-sealing process can be bent only in the vertical seal step, and only in the horizontal seal step. Another purpose is to provide a bag-making filling and packaging device and a packaging bag in which the horizontal seal portion can be bent, and to manufacture a gusseted square bottom type bag body that can be self-sustaining while shortening the web feeding stop time. Another object of the present invention is to provide a bag-making filling and packaging device that can be used, and a packaging bag that can produce a gusset square bottom that can stand on its own even if the outer surface of the tubular web does not have a heat-sealing material.

[0007]

The technical means taken by the present invention to solve the above-mentioned problems are as follows: the heater surface of the vertical sealing machine is inclined in a diagonal direction intersecting the radial direction passing through the center of the bag-making cylinder. It is characterized by being inclined.

Further, it is characterized in that the heater surface of the horizontal sealing machine facing at least the bottom of the bag body is inclined in an oblique direction intersecting with the hanging direction of the tubular web.

Then, a pair of folding pieces opposed to each other with the tubular web interposed therebetween are disposed so as to be reciprocally movable in a lateral direction orthogonal to the sandwiching direction by the horizontal sealing machine, and the tubular webs are opposed to each other by the operation of the folding pieces. It is preferable to fold inward a pair of both side surfaces and to laterally seal in the width direction of the web by a pair of lateral sealing machines to form a gusseted square bottom type bag body.

Furthermore, the invention is characterized in that the overlapping portion is bonded in the state of being held in an oblique direction intersecting the radial direction passing through the center of the cylindrical shape.

Further, the present invention is characterized in that the bag is laterally sealed while holding at least a portion corresponding to the bottom of the bag in an oblique direction intersecting the axial direction of the tubular web.

It is preferable that the tubular web is a gusset square bottom type in which a pair of opposite side surfaces of the tube-shaped web are folded inward and transversely sealed in a direction orthogonal to the folding direction.

[0013]

According to the above-mentioned technical means of the present invention, the overlapping portion of the web is provided between the heater surfaces of the vertical sealing machine which is inclined in an oblique direction intersecting the radial direction passing through the center of the bag-making cylinder. When sandwiched, it is bent in an oblique direction from the base end of the overlapping portion, and the tip of the overlapping portion is bonded together while holding the tip so as to approach the bag-making cylinder.

At least a portion of the tubular web corresponding to the bottom of the bag is sandwiched between the heater surfaces of the horizontal sealing machine which are inclined in an oblique direction intersecting the hanging direction of the tubular web. The bag is bent laterally from the base end of the portion corresponding to the bottom of the bag body, and is laterally sealed while holding the tip end close to either the front or back surface of the bag body.

Further, a heater of a horizontal sealing machine in which a pair of opposite side surfaces of the tubular web are folded inward by the operation of the folding pieces and inclined in an oblique direction intersecting the hanging direction of the tubular web. By sandwiching at least a portion of the tubular web corresponding to the bottom of the bag between the surfaces, the tip is bent obliquely from the base end of at least the portion of the bag corresponding to the bottom of the bag. It is laterally sealed while holding it close to each other.

Further, with a pair of opposite side surfaces of the tube-shaped web folded inward, at least a portion of the tube-shaped web corresponding to at least a bottom portion of the bag is tubular-shaped in a direction orthogonal to the folding direction. By laterally sealing while holding it in an oblique direction intersecting with the axial direction of the web, a lateral seal portion at least on the bottom side of the bag body has a crease, and the lateral seal portion with the crease due to the weight of the wrapped article. Is completely bendable.

[0017]

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

In this embodiment, as shown in FIG. 3, the bag-making filling and packaging apparatus takes out the web A by the intermittent operation of the pay-out mechanism 11 such as a belt and winds it around the bag-making cylinder 1 while winding its side edges. The overlapping portion A1 is sandwiched between a pair of vertical sealing machines 2 and 2 as shown in FIG. 1 so that the overlapping portion A1 is attached in a palm shape to form a tube shape, and a folding piece as shown in FIG. A pair of opposite side surfaces A3, A of the tubular web A2 hanging from the lower end of the bag-making cylinder 1 due to the protrusion of 3, 3
As shown in FIG. 2, while sandwiching 3 inward, it is sandwiched by a pair of horizontal sealing machines 4 and 4, so that the upper portion of the preceding bag body B1 after being filled with the wrapped article C and the upper portion thereof are continuous with each other. Lateral sealing is performed simultaneously with the bottom of the succeeding bag body B2 before being filled with the encapsulated article C, and the upper and lower lateral sealing portions A are simultaneously sealed.
The gusset square bottom type packaging bag is manufactured by projecting the cutter 12 between the A4 and A4 and cutting and separating.

In the vertical sealing machines 2 and 2, when the feeding of the web A by the feeding mechanism 11 is stopped, one or both of the heater surfaces 2a and 2a facing each other in parallel are overlapped with the overlapping portion A1 of the web A. It has a conventionally well-known structure in which it is moved in the contacting direction and sandwiched for a predetermined time. These heater surfaces 2a, 2a are diagonally intersecting with the radial direction passing through the center 1a of the bag making cylinder 1 as shown in FIG. By holding the overlapping portion A1 between the heater surfaces 2a, 2a while being inclined, the overlapping portion A1 is bent obliquely from the base end and the tip is held so as to approach the bag-making cylinder 1. While doing so, try to paste the palm together.
Further, the heater surfaces 2a, 2a are continuously formed with serrated teeth, which are fitted to each other in the feeding direction of the web A, as necessary, so that the vertical seal portion A1 'pasted on the palm is provided with a crease and an external appearance. You may improve adhesive strength. Further, below the vertical sealing machines 2 and 2, as the web A is fed out by the operation of the feeding mechanism 11 thereafter, the bag-making cylindrical body 1 and the bag-making cylinder 1 are cooled while cooling the vertical seal portion A1 'pasted on the palm. It may be possible to more surely fold the vertical seal portion A2 having a crease at an inclination by providing a folding means (not shown) forcibly bending toward the tubular web A2.

As shown in FIG. 2, for example, the folding pieces 3 and 3 are paired up and down by a pair of tubular webs A2 sandwiching a horizontal sealing machine 4 and 4, which will be described later, as described in Japanese Patent Laid-Open No. 2-152630. Bottom folding pieces 3a, 3a and upper folding pieces 3b, 3 facing both side surfaces A3, A3 of
b is arranged so as to be movable back and forth in the lateral direction orthogonal to the operating direction of the horizontal sealing machines 4 and 4, respectively, and immediately after the feeding of the web A by the feeding mechanism 11 is completed, these are provided on both side surfaces A3 of the tubular web A2. , A3 by moving and abutting the side surfaces A3, A3 corresponding to the bottom of the succeeding bag body B2 before being filled with the article C to be encapsulated, inwardly in plane isosceles triangular shape, respectively. Simultaneously with the folding, the portion corresponding to the upper portion of the preceding bag body B1 after being filled with the wrapped article C is folded inward from the respective widthwise centers.

The horizontal sealing machines 4 and 4 have the feeding mechanism 1 described above.
When the feeding of the web A by 1 is stopped, the heater surfaces 4a, 4a facing each other in parallel are moved in a direction in which they are brought into contact with the tubular web A2 hanging from the lower end of the bag-making cylinder 1 and the vertical seal portion A1 ', and for a predetermined time. It has a conventionally well-known structure for sandwiching, and faces the tubular web A2 and the vertical seal portion A1 'corresponding to at least the bottom of the following bag body B2 of the heater surfaces 4a, 4a before being filled with the article C to be encapsulated. The bottom seal portions 4b, 4b are respectively inclined in an oblique direction intersecting the hanging direction of the tubular web A2, and the heater surface 4 is slightly delayed from the protrusion of the folding pieces 3, 3.
By sandwiching the tubular web A2 and the vertical seal portion A1 ′ between the a and 4a and the bottom seal portions 4b and 4b,
At least a portion corresponding to the bottom of the bag body B2 is bent obliquely from the base end so that the tip is held close to the bottom surface of the bag body B2 and laterally sealed. In the case of the present embodiment, as shown in FIG.
The tubular web A2 and the vertical seal portion A corresponding to the upper portion of the preceding bag body B1 after being filled with the encapsulated article C of a.
The upper seal portions 4c, 4c facing 1'are respectively inclined so as to form a side-faced V shape with the bottom seal portions 4b, 4b, and the bag body B preceding between these upper seal portions 4c, 4c.
By simultaneously sandwiching the tubular web A2 corresponding to the upper part of 1 and the vertical seal portion A1 ', the leading end of the part corresponding to the upper part of the preceding bag body B1 is bent in an oblique direction and the tip of the bag body B1 is bent. It is designed to be laterally sealed while holding it close to either the front or back surface. Further, the upper seal portion 4 of the heater surfaces 4a, 4a.
The c and 4c do not necessarily have to be inclined in an oblique direction intersecting with the hanging direction of the tubular web A2 as shown in FIG. It is not necessary to incline in the hanging direction of A2.

The folding pieces 3, 3 are provided in the lateral seal portions A4, A4 laterally sealed by the heater surfaces 4a, 4a, or at least in the lateral seal portion A4 laterally sealed by the bottom seal portions 4b, 4b. As the adhesion means 5 for adhering the both side surfaces A3 and A3 which are brought into contact with each other and are brought into contact with each other, for example, in the middle of unwinding the web A, for example, the actual opening 62-12
As disclosed in Japanese Patent No. 7942, a perforation mechanism is provided to open opposed through holes so as to penetrate only both side surfaces A3 and A3, and the inner surfaces of the web A are brought into contact with each other through the through holes. As a result, a thermoplastic synthetic resin layer such as polyethylene or polypropylene having a heat-sealing property laminated on the inner surface of the web A or the inner surface of the web A composed of only the thermoplastic synthetic resin is melted and adhered at the time of lateral sealing. Let

Further, at the position opposite to the horizontal seal portion A4 which seals the bottom of the preceding bag body B1 which has been filled with the articles C to be encapsulated in the horizontal seal by the horizontal seal machines 4 and 4, the horizontal seal is provided. A means 6 is provided for further cooling the part A4 from the base end thereof in a bent direction and pressing it against the bottom surface of the bag B1. In the case of this embodiment, this means 6 is shown in FIG.
As shown in FIG. 7, a folding piece 6a that supports the bottom portion of the preceding bag body B1 so as to be swingable in the vertical direction toward a horizontal seal portion A4 that closes the bag, and a bag body B1 that is connected to the folding piece 6a.
And an air outlet 6b for blowing cooling air toward the horizontal seal portion A4 pressed against the bottom surface of the
Almost at the same time when the feeding of the web A by the feeding mechanism 11 is started, the folding piece 6a is swung upward so as to be parallel to the bottom surface of the preceding bag B1 and is made to stand by, and at almost the same time as the feeding of the web A is completed or at all times. Air outlet 6b ...
The cooling air is blown out from the
When the folding piece 6a is swung downward toward the exclusion position at substantially the same time as the protrusion of the above, the preceding bag body B1 separated along the folding piece 6a is guided to the exclusion position.

Next, the operation of the bag-making filling and packaging apparatus will be described.

First, when the web A is fed by a predetermined length by the intermittent operation of the feeding mechanism 11, as shown in FIG.
As shown in FIG. 2, the heater surfaces 2a, 2a of the vertical sealing machines 2, 2 abut and sandwich the overlapping portion A1 of the web A, and the overlapping portion A1 is bent obliquely from its base end so that the tip is for bag making. The vertical seal portion A1 ′ is pasted with the palm while holding it so as to be close to the cylindrical body 1, whereby the web A becomes a tube shape, and the vertical seal portion A1 ′ having the palm is attached with a crease bent obliquely.

After that, when the sandwiching of the vertical seal portion A1 'by the heater surfaces 2a, 2a is released and the feeding of the web A by the operation of the feeding mechanism 11 is started,
The tube-shaped web A2 pasted on the palm is fed out from the lower end of the bag-making cylinder 1 to the lower side, and during this feeding, if necessary, a vertical seal portion A1 'with a folding habit is obliquely formed by a folding means. While being cooled, it is further bent toward the bag-making cylinder 1 and the tubular web A2.

When the feeding of the web A is completed, the bottom folding pieces 3a, 3a of the folding pieces 3, 3 are immediately formed on both side surfaces A of the tubular web A2 as shown in FIG.
3, A3 is abutted and folded inward in the shape of a plane isosceles triangle.

Slightly after the folding, the heater surface 4 of the horizontal sealing machines 4 and 4 as shown in FIG.
The bottom seal portions 4b, 4b of a, 4a are in contact with and sandwiched by the inwardly-folded tubular web A2 corresponding to the bottom portion of the bag B and the vertical seal portion A1 'with a crease. A portion corresponding to the bottom portion of B is laterally sealed while being bent obliquely from its base end so that the tip end thereof approaches the bottom surface of the bag body B, thereby horizontally sealing the bottom portion of the bag body B1. A4 has a crease that is bent obliquely.

As the next web A is unrolled, the bag B having the bottom closed is further unrolled downward, and at the same time, the bag C is filled with the article C to be encapsulated through the bag making cylinder 1. After that, the lateral seal portion A4 that seals the bottom portion of the bag body B abuts on the folding piece 6a that is on standby, and is further folded in the direction in which the crease has a crease in relation to the weight of the filled encapsulated article C. , Is pressed against the bottom surface of the bag body B.

When the feeding of the web A and the filling of the article C to be encapsulated are completed, the folding pieces 3 and 3 for folding the bottom portions 3a and 3a simultaneously with the folding pieces 3b for the upper portion as shown in FIG. , 3b collide with both side surfaces A3, A3 of the tubular web A2, and the both side surfaces A3, A3 corresponding to the upper part of the preceding bag body B1 after being filled with the article C to be encapsulated are inward from the respective widthwise centers. Is folded into.

A little later than the folding, at the same time as the horizontal sealing of the bottom portion of the succeeding bag body B2 before filling the wrapped article C with the bottom sealing portions 4b, 4b, as shown in FIG. The upper seal portions 4c, 4c of the heater surfaces 4a, 4a of 4 abut on the inwardly folded tubular web A2 corresponding to the upper portion of the preceding bag B1 and the vertical seal portion A1 'with a crease. Sandwich it, this bag B1
The part corresponding to the upper part of the bag is bent diagonally from its base end and laterally sealed while holding the tip so as to come close to either one of the front and back surfaces of the bag body B1.
The lateral seal portion A4 that closes the upper portion of 1 is provided with a crease that is obliquely bent.

Further, during this lateral seal, cooling air is blown from the air outlet 6b toward the lateral seal portion A4 that seals the bottom of the preceding bag body B1 and is pressed against the bottom surface of the bag body B1. The horizontal seal portion A4, which is cooled as it is, thereby closing the bottom portion of the bag B1, is folded along the bottom surface thereof and does not return to the original state before folding, and is further folded by the bonding means 5. Since both side surfaces A3 and A3 that face each other are adhered to each other, the bag body B
Independence of 1 becomes certain.

Thereafter, a lateral seal portion A4 obtained by sealing the upper portion of the preceding bag B1 after being filled with these encapsulated articles C.
The cutter 12 is projected and cut and separated between the above and a horizontal seal portion A4 that seals the bottom portion of the succeeding bag body B2 before the continuous encapsulated articles C are filled above the cutter body 1.
After being cut and separated by 2, the preceding bag body B1 becomes a completed packaging bag and is discharged to the exclusion position along the folding piece 6a that swings downward, and thereafter, the web A is unwound. The above-described operation is repeated.

In the embodiment shown above, the bag-making filling and packaging apparatus is
A gusset corner bottom type packaging bag in which the overlapping portions A1 of the web A are bonded together and the pair of opposite side surfaces A3, A3 of the tubular web A2 are folded inward by the protrusion of the folding pieces 3, 3. Although it was produced, the invention is not limited to this.
3 is removed to form a vertical seal portion A1 ′ having a diagonal crease by stacking the overlapping portions of the webs as shown in FIG. 4, and at the same time, a horizontal seal portion at least on the bottom side of the bag body B. A4 only or upper and lower horizontal seals A4
A wrapping bag of vertical pillow that is not a gusset square bottom type is manufactured by bending both A4 from its base end in an oblique direction so that the tip approaches either one of the front and back sides of the bag B. Also good. Further, instead of the vertical sealing machines 2 and 2 of the bag-making filling and packaging apparatus of the embodiment shown in the above, for example, JP-A-5-42 is used.
By providing a vertical sealing machine that vertically seals by sandwiching the overlapping portion between the bag-making cylindrical body and one heater surface as disclosed in Japanese Patent Publication No. 905, the overlapping portion A1 of the web A is bonded together. A gusseted square bottom type packaging bag may be produced.

Further, the folding pieces 3, 3 of the lateral seal portion A4
As the adhesion means 5 for adhering the opposite side-to-side surfaces A3 and A3, which are folded into each other, with each other, a through hole penetrating only the both side surfaces A3 and A3 is opened in a facing manner, and the inner surface of the web A is passed through the through hole. Although abutting each other, the invention is not limited to this.
The shape of the through hole is not limited to that shown in the figure, and any other shape may be used as long as it has the same function, and the adhesive is directly supplied between the side surfaces A3 and A3 of the lateral seal portions A4 and A4. A mechanism for doing so may be provided and bonded.

[0036]

Since the present invention has the above-mentioned structure, it has the following advantages.

1. By sandwiching the overlapping portion of the web between the heater surfaces of the vertical sealing machine that is inclined in an oblique direction intersecting the radial direction passing through the center of the bag-making cylinder,
Since it is bent diagonally from the base end of the overlapping part and the tip is attached so that the tip is close to the bag making cylinder, the vertical seal part is attached only in the vertical sealing step. To be

Therefore, after the horizontal seal, most of the vertical seal portion protrudes from the bag body as compared with the conventional one in which most of the vertical seal portion except the horizontally sealed upper and lower ends return to the original state before folding. Instead, the appearance is improved and the product value can be significantly improved.

2. By sandwiching at least the portion of the tubular web corresponding to the bottom of the bag body between the heater surfaces of the horizontal sealing machine that are inclined in an oblique direction intersecting the hanging direction of the tubular web, at least at the bottom of the bag body. It bends in an oblique direction from the base end of the corresponding part and laterally seals while holding the tip close to one of the front and back surfaces of the bag body. Attached.

Therefore, as compared with the conventional one in which the horizontal seal portions located at the upper and lower ends of the bag body respectively project in the axial direction of the tubular web, the vertical seal portions having a crease in the boxing of the corrugated cardboard or the like resist the resistance. Without packing, it can be packed in a box without bending, which makes it possible to make the packing size compact and reduce the transportation cost.In particular, even if the wrapped article is easily damaged such as potato chips, the load is not applied when packing. It does not affect the packaged items and can completely prevent breakage, and especially when the bag is leaning and displayed, the horizontal seal part at the bottom in particular bends to either the front side or the back side of the bag, respectively. The appearance is good and the product value is improved.

3. With the pair of opposite side surfaces of the tube-shaped web folded inward by the operation of the folding piece, between the heater surfaces of the horizontal sealing machine inclined in an oblique direction intersecting the hanging direction of the tube-shaped web, By holding at least a portion of the tubular web corresponding to the bottom of the bag, the tubular web is bent obliquely from the base end of the portion corresponding to the bottom of the bag and the tip is held so as to approach the bottom of the bag. However, since it is laterally sealed, it is possible to fabricate a bag of a gusset square bottom type that can stand on its own while shortening the feeding stop time of the web.

Therefore, as compared with the conventional one in which the feeding of the web cannot be started until the folding step and the cooling step are completed after the horizontal sealing, the operation can be performed at a high speed and the operation efficiency is improved, and the workability in the box packing is good. It also improves the aesthetics when displayed.

4. With the pair of opposite side surfaces of the tubular web folded inward, at least a portion of the tubular web corresponding to the bottom of the bag is oriented in the direction orthogonal to the folding direction with the axial direction of the tubular web. By laterally sealing while holding in a diagonal direction intersecting with each other, at least the lateral seal portion on the bottom side of the bag body has a crease, and the lateral seal portion having the crease is completely bent by the weight of the wrapped article. Therefore, even if there is no material having a heat-sealing property on the outer surface of the tubular web, a self-standing gusset square bottom can be produced only by laterally sealing.

Therefore, not only a material having a heat-sealing property is required not only on the inner surface but also on the outer surface of the tubular web, and the cost can be reduced as compared with the conventional one in which bending and cooling of the lateral seal portion are required.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a bag-making filling and packaging apparatus showing an embodiment of the present invention.

FIG. 2 is a side view of the same reduced vertical section.

FIG. 3 is a rear view of the same reduced vertical section.

FIG. 4 is a perspective view showing a packaging bag that is not a gusset square bottom type in which overlapping portions of webs are bonded together.

[Explanation of symbols]

A web A1 overlapping portion A2 tubular web A3 side surface A4 horizontal sealing portion B bag body B1 bag body B2 bag body C encapsulation article 1 bag making cylinder 2 vertical sealing machine 2a heater surface 3 folding piece 4 horizontal sealing machine 4a Heater surface 5 Adhesive means (through hole)

Claims (8)

[Claims] 1. A rolled-up web is wrapped around a bag-making cylinder, and both side edges of the web are overlapped so as to project from the bag-making cylinder. The pair of vertical sealing machines oppose each other. By sandwiching the web, it is attached to the palm in the feeding direction to form a tube and hung down, and by sandwiching the tube-shaped web with a pair of opposed horizontal sealing machines, the web is transversely sealed in the width direction of the bag. In the bag-making filling and packaging apparatus for filling the articles to be encapsulated through the bag-making cylinder through the bag-forming body, the heater surface of the vertical sealing machine intersects the radial direction passing through the center of the bag-making cylinder, respectively. A bag-making filling and packaging apparatus characterized by being inclined in a diagonal direction. 2. A web which is intermittently fed is wound around a bag-making cylinder, both side edges thereof are overlapped with each other, and the overlapped portion is vertically sealed by a vertical sealing machine in the feeding direction of the web to form a tubular shape. While hanging down and sandwiching the upper and lower two places of the tubular web with a pair of lateral sealing machines facing each other, the bag is formed in the bag while laterally sealing in the width direction of the web to form a bag. In a bag-making filling and packaging apparatus for filling an encapsulated article through a cylindrical body for heating, a heater surface of a horizontal sealing machine facing at least a bottom portion of the bag body is inclined in an oblique direction intersecting with a hanging direction of a tubular web. A bag-making filling and packaging device characterized by: 3. A pair of folding pieces facing each other with a tubular web sandwiched therebetween are disposed so as to be reciprocally movable in a lateral direction orthogonal to a sandwiching direction by a horizontal sealing machine, and the tubular webs are opposed to each other by the operation of the folding pieces. 3. The bag-making filling and packaging apparatus according to claim 2, wherein a pair of lateral sealing machines are folded inward and laterally sealed in the width direction of the web by a pair of lateral sealing machines to form a gusset square bottom type bag body. 4. The bag-making filling and packaging apparatus according to claim 3, further comprising an adhesive means for adhering opposite side surfaces of the lateral seal portion that are folded and folded by the folding piece to each other. 5. A web is wound in a cylindrical shape, and both side edges of the web are overlapped with each other so as to project from the cylindrical shape, and the overlapped portions are sandwiched by a pair of vertical sealing machines, so that the web is attached in the palm-out direction. In a packaging bag formed by laterally sealing the tubular web in the width direction, the overlapping portion is held in a diagonal direction intersecting the radial direction passing through the center of the cylindrical shape. A packaging bag that is characterized by 6. A web is wound into a cylindrical shape, both side edges thereof are overlapped, and the overlapped portion is vertically sealed in a feeding direction of the web to form a tube shape, and two upper and lower portions of the tube-shaped web are respectively formed. In a packaging bag produced by laterally sealing in the width direction by sandwiching it with a pair of horizontal sealing machines, at least a portion corresponding to the bottom of the bag body is laterally held in a diagonal direction intersecting the axial direction of the tubular web. A packaging bag characterized by being sealed. 7. The packaging bag according to claim 6, which is a gusset square bottom type in which a pair of opposite side surfaces of the tubular web are folded inwardly and laterally sealed in a direction orthogonal to the folding direction. 8. The packaging bag according to claim 7, wherein both side surfaces of the lateral seal portion, which are folded and face each other and abut against each other, are adhered to each other.