JPH10194208A - Folding mechanism of package manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the appearance of a package by surely folding flaps which are formed at a sealing part of the package, on the end surface of a semi-package. SOLUTION: A pair of rotary supporting plates 87 are rotatably arranged at a position corresponding with the end part of a semi-package 2, and a pad member 89 is attached to the rotary supporting plates 87. The pad member 89 has a flap fitting recessed part 91 in which a flap 90 is fitted, and the flap 90 is surely housed inside. By rotating the rotary supporting plate 87 under a state wherein the flap 90 is fitted, the flap 90 can be folded on the end surface of the semi-package 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding mechanism of a package manufacturing apparatus which is incorporated in a manufacturing apparatus for manufacturing a package in which drinking water such as juice and other contents are enclosed, and folds an end face of the package.

[0002]

2. Description of the Related Art A paper packaging material laminated with a plastic film is used as a packaging material in which contents such as milk and juice are enclosed for the purpose of reducing the weight of the package and reducing the price. ing. In the manufacture of this package, while supplying the packaging material in the longitudinal direction, the container is vertically sealed to form a cylinder, and the contents are filled into the cylinder, and then the contents are filled by performing transverse sealing and cutting in the transverse direction. The semi-package is an intermediate product.

When the semi-package is formed into a final package, the seals at both ends formed by the horizontal seal are bent toward the end face, and then the seal is folded toward the end face, and the packaging material is hexagonal and octagonal. The shape is arranged as a polygonal shape such as a polygon. In the case where the seal portion is folded toward the end face of the semi-package, it is necessary that the seal portion is neatly overlapped with the end face. For this reason, a fold line is formed in the seal portion, and a pair of flaps is formed by temporarily folding along the fold line, and the flaps are bent toward the end surface of the semi-package.

[0004]

By the way, in a packaging material having a thick package such as paper, the thickness of the flap on which the packaging material overlaps is further increased and the rigidity is also increased. Even if such a flap is folded to the end face of the semi-package, it does not bend well, and the bending is irregular and uneven, so that it is difficult to fold the end face neatly. When the flaps are folded in an irregular state, the appearance of the package is deteriorated, and the commercial value is reduced, which is not preferable.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a folding mechanism of a package manufacturing apparatus which can fold the flaps in order and can prevent the appearance of the package from deteriorating.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a pair of flaps formed by tentatively folding a sealing portion at an end of a package in a molding process is formed. A folding mechanism for folding the package toward an end surface thereof, wherein the pair of rotation support plates are disposed at positions corresponding to both sides of a seal portion of the package in the molding process, and rotate toward the end surface of the package in the molding process. And a pad member attached to each rotation support plate, abutting against the flap, and pressing the flap toward the end face by rotation of the rotation support plate.

In this mechanism, a pair of pad members abut each flap of the package in the process of molding, and the rotation support plate rotates in this abutting state. Due to this rotation, the pad member exerts a pressing force on the flap, so that the flap is pressed and bent toward the end face of the package being formed. For this reason, even if the thickness and rigidity of the packaging material are large, the flap can be reliably bent, and the end face can be folded properly.

According to a second aspect of the present invention, in the first aspect, the pad member is provided on a flap fitting recess into which the flap is fitted, and is formed on both sides of the flap fitting recess to form the pad member. And an end surface pressing projection which comes into contact with the end surface of the package.

The flap can be housed inside the flap by engaging the flap with the flap.
As a result, the flap and the pad member are engaged with each other,
Flaps do not come off and can be reliably folded.

A third aspect of the present invention is the invention according to the second aspect, wherein the inner wall of the flap fitting projection of the flap has a shape following the outer shape of the flap.

Since the flap fitting recess has an inner wall following the outer shape of the flap, the flap is securely fitted to the flap and does not come off.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a folding mechanism of a package manufacturing apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the overall configuration of a package manufacturing apparatus 1 in which the folding mechanism of this embodiment is incorporated.

The package manufacturing apparatus 1 is a semi-package 2 in which a predetermined amount of contents such as juice and tea is filled by a filling machine (not shown) in a filling step which is a preceding step (see FIG. 2A). Is molded into a predetermined shape while the content is being filled, and is made into a final package 5 (see FIG. 2 (c)), which is sent to the next process such as a box packing process or an inspection process.

As shown in FIG. 1, a standby section 4 located on the side of the filling machine and a semi-package 2 conveyed from the standby section 4 are formed on a base 3 into a predetermined shape to complete a finished product. And a final package 5 formed by the molding unit 6.
And a sending unit 7 for sending the next step to the next step.
Further, on the base 3, a semi-package transport mechanism 8 for transporting the semi-package 2 to the standby unit 4 and the molding unit 6, and a final package 5 molded into a predetermined shape by the molding unit 6.
Package transport mechanism 9 for transporting
Are provided.

As shown in FIG. 2 (a), the semi-package 2 supplied from the filling machine to the standby section 4 has a cylindrical shape by being filled with the contents, and has a horizontal portion at both ends. Seal portions 2a and 2b extending in the directions are formed.

The semi-package transport mechanism 8 has a structure shown in FIG.
As shown in FIG. 1, a plurality of semi-package conveyors (only two are shown in FIG. 1) 10 are arranged from the standby section 4 to the forming section 6 in the conveying direction of the semi-package 2 (the direction of arrow A in FIG. 1). Have been. The semi-package conveyor 10 is wound around a sprocket 11 arranged on the filling machine side of the standby unit 4 and a sprocket 12 arranged on the delivery unit 7 side of the forming unit 6 in a loop shape. 2 in the transport direction. Similarly, another semi-package conveyor 10 is wound around the sprockets 11 and 12.

The plurality of sprockets 11 around which the semi-package conveyor 10 is wound are fixed to a standby-side shaft 13 arranged along a direction substantially perpendicular to the direction of transport of the semi-package 2. One end of the standby section side shaft 13 is connected to a drive shaft of a transport motor 14 fixed on the base 3, and the other end is rotatably supported by a bearing 15 fixed on the base 3.

A plurality of sprockets 12 on the other side around which the semi-package conveyor 10 is wound are fixed to a molding section-side shaft 16 arranged along a direction substantially orthogonal to the conveying direction of the semi-package 2. ing. Both ends of the molded portion side shaft 16 are rotatably supported by bearings 17, 17. By driving the transport motor 14, the plurality of semi-package conveyors 10 move simultaneously in the transport direction of the semi-package 2.

A plurality of carriers (not shown) projecting laterally are fixed to the semi-package conveyor 10.
The carrier has one end fixed to the semi-package conveyor 10, and protrudes toward the adjacent semi-package conveyor 10, that is, along the same direction as the standby unit side shaft 13 and the forming unit side shaft 16. . The interval between the adjacent carriers in the semi-package conveyor 10 corresponds to the length of the semi-package 2, and the adjacent carriers on the upstream and downstream sides in the transport direction are sealed at the two end portions of the semi-package 2a, 2b. Has come to support.

In the forming section 6, as shown in FIG.
After the seal portions 2a and 2b at both ends are bent toward both end surfaces, the body 2d is bent along the fold line 2e to form a polygon. As a result, a polygonal cylindrical final package 5 as shown in FIG. The final package 5 thus formed is transported to the sending-out section 7 by the final package transport mechanism 9.

As shown in FIG. 7, the molding part 6 is disposed at an upper part and a lower part in a support frame 33 erected on the base 3 to form an upper die 34 and a lower die 34 for molding the semi-package 2 into a hexagonal column shape. The semi-package 2 is supported at a predetermined position on the lower mold 35 by being supported by the mold 35 and support plate portions 36 arranged on both sides of the support frame 33, that is, on both sides of the semi-package 2 in the conveying direction (the direction of arrow B in the drawing). And a guide bending mechanism 37 for bending the seal portions 2a and 2b on both sides in the longitudinal direction in the same direction, and the seal portions 2a on both sides in the longitudinal direction of the semi-package 2 supported by the support plate portion 36. A folding machine 38 for forming a folding line (hereinafter referred to as a “folding line”) immediately before 2b, and a folding mechanism 3 for folding both sides of the semi-package 2 in the longitudinal direction from the folding line provided by the folding machine 38. If, for adhering the folded portions, and a hot air blowing means for melting the surface of the overlapping portion of the semi-package 2 (not shown).

The support frame 33 includes a pair of vertical frame portions 41, 41, which are arranged in parallel along a direction perpendicular to the transport direction of the semi-package 2 and erected from the base 3.
The vertical frame portions 41 are formed in a rectangular shape by a horizontal frame portion 42 connecting the upper end surfaces of the vertical frame portions 41 to each other. A lower mold 35 is arranged on the side of the base 3 in the support frame 33.
The upper die 34 is arranged on the horizontal frame 42 so as to face the upper die 34.

As shown in FIG. 4, the lower mold 35 has a molding surface 43 having an arc-shaped cross section curved upward, and the upper mold 34 has a molding surface 44 having an arc-shaped cross section curved downward. Have. Then, the semi-package 2 is sandwiched between the upper mold 34 and the lower mold 35, whereby the outer diameter shape of the semi-package 2 is formed into a hexagonal cross section.

The lower die 35 is moved by an elevating mechanism 45 to the upper die 34.
It can be moved up and down so as to come and go with respect to. The elevating mechanism 45 has the lower mold 35 placed thereon and the vertical frame 41
A lifting motor 46 is supported on both sides so as to be movable, and a drive motor 47 for lifting and lowering the lifting member 46.

The lower mold 35 is located below the semi-package transport mechanism 8 before the semi-package 2 is molded, that is, before the semi-package 2 is raised toward the upper mold 34. In this state, the molding surface 43 is
Opposing between the carriers. Then, the lower part of the semi-package 2 supported between the carriers is brought into contact with the molding surface 43 by ascending toward the upper mold 34, and the semi-package 2 is interposed between the upper mold 34 by further ascending the lower mold 35. Of the body (between the seal portions 2a and 2b). Lower mold 35
When the semi-package 2 rises with the semi-package 2 placed on the molding surface 43, the seal portions 2a and 2b on both sides in the longitudinal direction of the semi-package 2 are bent toward the base 3 by the guide bending mechanism 37. At the same time, the semi-package 2 is positioned at a regular position on the molding surface 43 of the lower mold 35.

As shown in FIGS. 5 and 6, the guide bending mechanism 37 has four guide blocks 48, 48, 4 corresponding to the widthwise ends of the seals 2a, 2b of the semi-package 2.
8, 48 and these guide blocks 48, 48, 48,
And a parallel link mechanism 50, 50, 50, 50 for connecting 48 to the support plate portions 49, 49, 49, 49, respectively.

A groove 51 is formed inside the guide block 48 as shown in FIG. The groove portion 51 has an introduction portion 52 whose lower portion is formed wider, and an upper portion of the introduction portion 52 serves as a positioning portion 53 which gradually narrows upward. In the introduction portion 52, a part of one wall portion 54 forming the groove portion 51 is cut out, and the cutout forms a slope 55 on the wall portion 54. In the groove 51, both sides of the seal portions 2a, 2b of the semi-package 2 placed on the lower mold 35 are inserted from the introduction portion 52, respectively, and as the lower mold 35 rises, the seal portions 2a, 2b Both sides move to the positioning part 53 side.

In this case, as shown in FIG. 7, the semi-package 2 rises, and
is inserted, both side portions 2 in the width direction of the seal portion 2a are inserted.
c slides on the slope 55 and moves to the upper part of the wall portion 54. Further, when the semi-package 2 rises, the tip portions on both sides of the seal portion 2a abut against the inner wall 56 of the groove 51, and the seal portion 2a is bent downward as the semi-package 2 rises. At this time, both side portions in the width direction of the seal portion 2a are in contact with the wall portion 56. Then, the seal portion 2a is finally positioned at the positioning portion 53, so that it is positioned at a predetermined position.

The parallel link mechanism 50 for connecting the guide block 48 to the support plate 49 has two ends rotatably supported at one end by the support plate 49 and the other end rotatably supported by the guide block 48. Of parallel links 57 and 58. The rotating shaft of the parallel link 58 located on the lower side is connected to a drive shaft of a motor (not shown). When the lower parallel link 58 is rotated by the driving of the motor, the guide block 48 moves parallel to the support plate 49 (in the vertical direction in this case).

When the semi-package 2 rises, the guide block 48 is located at the upper position, and the seal portion 2a
After is located at the positioning portion 53, the guide block 48 moves downward, and the seal portion 2a comes out of the groove portion 51. In this state, the semi-package 2 is
Are bent downward at substantially right angles, and are positioned at predetermined positions on the lower mold 35.

In such a guide bending mechanism 37, the seal portions 2a and 2b of the semi-package 2 are inserted into the groove portion 51 from the introduction portion 52, and the semi-package 2 rises, so that the inner wall 56 is formed with the seal portions 2a and 2a. 2b is bent downward, and the positioning part 53 positions the semi-package 2. Therefore, both the bending of the seal portions 2a and 2b and the positioning of the semi-package can be performed only by the groove portion 51, so that the positioning mechanism of the semi-package becomes unnecessary, and the structure is simple and the control is easy. In addition, since the positioning is performed while bending, high-precision positioning can be performed, and a wide operating area for these is not required.

Further, an inclined surface 55 on which both side surfaces 2c near the seal portions 2a and 2b slide is formed in the groove 51.
This slope 55 forcibly bends both side portions 2c in the same direction as the seal portions 2a and 2b. Therefore, both side portions 2c
The seal portions 2a and 2b can be reliably and easily bent without being affected by the expansion or deformation of the seal portions 2a and 2b.

After the semi-package 2 has been positioned at the predetermined position of the lower mold 35 as described above, the folding machine 3
8, a fold line is formed on a portion of the semi-package 2 immediately before the seal portion 2a.

[0034] As shown in FIG.
The supporting frames 33 are supported by supporting plate portions 36 arranged on both sides of the supporting frame 33, respectively. As shown in FIG. 8, the folding line forming machine 38 includes an upper arm 59 and a lower arm 60.
And is formed by.

The upper arm portion 59 includes a pair of rotating arms 61, 61 arranged in parallel at a predetermined interval (an interval substantially equal to the width of the seal portion 2a of the semi-package 2). Bending arms 62, 62 whose intermediate portions are rotatably connected to the distal end of the bending arm 61;
And a folding line attaching tool 63 fixed to the front end of the second.

Each of the pair of rotating arms 61 has an L-shape and one end thereof is rotatably supported by a support shaft 64. Both ends of the support shaft 64 are supported by a pair of support blocks (not shown) fixed to the support plate portion 36. In addition, elongated holes 65 are formed coaxially at the intermediate portions of the rotating arms 61, that is, at the corners bent in an L-shape. Shafts (not shown) projecting from one side of the upper connection block 67 are inserted into these long holes 65. The other side of the upper connecting block 67 is fixed to a movable block 68 shown in FIG. A pair of guide shafts 69, 69 are inserted through the movable block 68. The pair of guide shafts 69 are connected to the vertical plate portions 7 at both ends of the support plate portion 36.
It runs between 0 and 70 in parallel. The movable block 68 is driven by a motor 71 to move one of the vertical plate portions 7.
It is freely movable toward and away from 0.

As a result, the vertical plate 70 on the support frame 33 side
When the movable block 68 is moved by the driving force of the motor 71, the rotating arms 61, 61 rotate around the support shaft 64 in the direction E in FIG. Moves, the rotating arm 6
8 rotate in the direction F in FIG.

The intermediate portions of the bending arms 62, 62 are rotatably connected to the distal ends of the rotating arms 61, 61 by rotating shafts 72, 72, respectively. A plunger 73 is provided on the rear end side of the bending arm 62 on the side of the rotating arm 61. A compression coil spring 74 is arranged between the turning arm 61 and the bending arm 62 of the plunger 73. For this reason, the bending arm 62 is always operated by the compression coil spring while the distal end of the bending arm 62 is positioned downward.
It is elastically biased. A bending tool 63 is fixed downward at the tip of the bending arm 62.

In the folding tool 63, three contact surfaces 75, 76, 77 facing in different directions are continuously formed by ridge lines 78, 79. These contact surfaces 75, 76, 7
7 presses the outer surface of the semi-package 2 between the contact surfaces 82 and 83 of the folding tool 80 of the lower arm portion 60 described later, so that the portions abutting the ridge lines 78 and 79 become fold lines.

The lower arm section 60 has the same configuration as the upper arm section 59 and has a different direction. That is, the lower arm 60
Also has a pair of rotating arms 61, 61, a pair of bending arms 62, 62, and folding tools 80, 80.
The pair of rotating arms 61 on the lower arm unit 60 side are
A pair of rotating arms 61, 61 of the upper arm portions 59, 59
, And is arranged upward facing the support shaft 64 so as to be rotatable about the support shaft 64. Similarly, the pair of rotary arms 61 have long holes 65 formed at the corners, and a shaft (not shown) projecting from one side of the lower connection block 81 is inserted. . The other side of the lower connection block 81 is also fixed to the movable block 68. As a result, when the movable block 68 moves toward one vertical plate portion 70, the rotating arm 61 rotates around the support shaft 64 in the direction E in FIG. 8 and moves toward the other vertical plate portion 70. When the block 68 moves, it moves to the opposite side.

Rotating arms 61 of lower arm section 60
Of the bending arm 6 as in the upper arm 59.
The intermediate portions 2 and 62 are rotatably connected. In this case, the bending arm 62 of the lower arm section 60 is arranged to face the bending arm 62 of the upper arm section 59. The upper arm 5 is also provided on the rear end side of the bending arm 62.
Similarly to the bending arm 62 of FIG. 9, a plunger 73 is provided, and a compression coil spring 74 is provided between the bending arm 62 and the rotating arm 61. Has been energized. Lower end folding tools 80, 80 are fixed to the distal end of the bending arm 62.

The lower folding tool 80 has two contact surfaces 8
2, 83 and a ridge line 84 between these contact surfaces 82, 83 are provided. Then, between the folding tool 63 of the upper arm section 59 and the folding tool 80 of the lower arm section 60, both seal portions 2a, 2a in the longitudinal direction of the semi-package 2 are provided.
The fold lines are formed by the ridge lines 78 and 79 of the folding line attaching tool 63 by sandwiching the vicinity of both sides in each width direction of b.

In such a folding machine 38, the seal portion 2a is sandwiched between the contact surfaces 75, 76, 77 of the upper folding tool 63 and the contact surfaces 82, 83 of the lower folding tool 80. Ridges 78, 79 and 84
Is formed on the seal portion 2a along with the contact surface 7 due to the rotation of the rotating arms 61, 61, 61, 61.
Due to the pressing of 5, 76, 77 and 82, 83, the seal portion 2a is temporarily folded along the folding line. Then, flaps 90 (see FIGS. 12 and 14) are formed on both sides of the seal portion 2a by the temporary folding and the pressing of the pressing member 85 of the folding mechanism 39 described later.

At this time, the upper arm portion 59 and the lower arm portion 60 rotate about the support shaft 64 in a direction approaching each other, and the contact surfaces 75, 76, 77 of the folding tools 63 and 80.
And 82 and 83 abut against the semi-package 2 and apply a reaction force to the bending arm 62 from the semi-package 2, since the bending arm 62 is elastically urged by the compression coil spring 74. By rotating the bending arm 62 against the force, the reaction force can be absorbed. Therefore, no excessive force is applied to the semi-package 2, and the semi-package 2 is not displaced by the reaction force.

In the folding machine 38 described above, the pair of rotating arms 61 rotate, and the contact surfaces 75, 76, 77 and 82, 83 of the folding tools 63, 80 sandwich the seal portion 2a, and the ridge line is formed. Since the folding line along 78, 79 and 84 is formed in the seal portion 2a at the same time as the seal portion 2a is temporarily folded along the folding line, the folding line can be clearly added.
In addition, since the folding line and the temporary folding are performed while the contact surfaces 75, 76, 77 and 82, 83 are in contact with each other, they can be formed accurately and accurately without displacement.

Further, the compression coil spring 74 urges the upper and lower bending arms 62 so that the folding tools 63 and 80 come into contact with the seal portion 2a of the semi-package 2. In this structure, since the reaction force from the semi-package 2 is absorbed by the urging force of the compression coil spring 74, the semi-package 2 is not displaced by the reaction force. Therefore, the folding line can be formed more accurately.

In the above description, the sealing portion 2a on one side of the semi-package 2 has been described. However, the bending of the sealing portion 2b on the other side to the lower side by the guide bending mechanism 37 and the folding line The forming of the folding line and the provisional folding by the attaching machine 38 are performed in the same manner.

When the folding line is formed in the semi-package 2,
The space between the upper and lower arm portions 59 and 60 is opened and the folding mechanism 39 folds the folding arm along the folding line.

As shown in FIGS. 10 and 11, the folding mechanism 39 is provided in the longitudinal direction (transport direction) of the semi-package 2.
Of the semi-package 2
a, 2b are pressed in the width direction intermediate portions to seal portions 2a, 2b.
Pressing tool 8 that forms flaps on both sides of b according to the fold line
5 and seal portions 2a, 2b formed by pressing tool 85
And a folding tool 86 that bends the flaps 90 on both sides toward the center along the folding line.

The pressing tool 85 presses both end faces of the semi-package 2 excluding the flaps 90 when making a fold line on both sides of the seal portions 2a and 2b of the semi-package 2 by the folding line forming machine 38. Further, the pressing device 85 is provided with hot air outlets at a plurality of positions, and when pressing the end surface of the semi-package 2, hot air is blown to a predetermined position of the end surface, that is, a portion where a flap 90 described later overlaps the end surface. Spray.

The folding tool 86 is, as shown in FIG.
The rotation support plate 87 includes a pad member 89 fixed to a bent surface 88 of the rotation support plate 87. Rotation support plate 87
Is rotatable around an axis in the vertical direction with respect to the base 3, and is disposed so as to face both sides of the seal portions 2a and 2b of the semi-package 2.

As shown in FIGS. 12 and 13, the pad members 89 are provided on both sides of the flap fitting recesses 91 for fitting into the flaps 90 formed on both sides of the semi-package 2. It is formed by end face pressing projections 92 and 93 that press the end faces (portions where the flaps 90 do not overlap) of the semi-package 2. In this case, the inner wall 91a of the flap fitting concave portion 91 is
0, so that the flap 90 can be reliably housed inside.

In the folding mechanism 39, the rotation support plate 8
7 rotates toward the end face side of the semi-package 2, the already formed flap 90 is moved to the flap fitting recess 91.
Fits. Further, the rotation of the rotation support plate 87 causes the flap 90 to be folded on the end surface of the semi-package 2. At this time, since the surface of the portion to which the hot air is blown in advance is melted from the hot air outlet, the flap 90
Can be welded to the end face at the same time as the contact.

Therefore, even if the flap 90 rises from the sealing portions 2a and 2b of the semi-package 2 during the temporary folding at the time of forming the folding line, the flap fitting concave portion 91 is formed in the flap 9
The flap 90 does not fluctuate because it is fitted to zero and housed inside. Thereby, even if the thickness of the packaging material or the rigidity of the packaging material is high, the flap 90 can be reliably folded on the end face of the semi-package 2 and can be along the end face, so that the design can be folded. Becomes
The appearance of the final package 5 is improved.

In the folding mechanism 39, the semi-package 2 facing the flap 90 by blowing hot air is used.
Is melted, whereby the flap 90 can be welded to the end face simultaneously with the folding of the flap 90, so that the flap 90 can be quickly and reliably fixed.

FIG. 14 shows a state change of the end face of the semi-package 2 by the above-described molding. When the rotation support plate 87 rotates in the state of FIG. 2 and is bonded to the end face. After the flap 90 of the semi-package 2 is welded to the end surface, the semi-package 2 is further formed into a hexagonal column by the upper mold 34 and the lower mold 35 to form a final package as a finished product. The final package 5 thus formed is transported to the sending-out section 7 by the final package transport mechanism 9.

[0057]

As described above, according to the first aspect of the present invention, the pair of pad members abut against the respective flaps of the semi-package, and the rotation of the rotary support plate in this abutting state causes the pad members to hold the flaps. Because of the pressing, the end face of the semi-package can be reliably folded at the flap, and the flap can be orderly folded at the end face of the semi-package.

According to the second aspect of the present invention, since the flap fitting recess is fitted to the flap and the flap is housed inside,
The flap and the pad member are engaged with each other, so that the flap does not come off and can be reliably bent.

According to the third aspect of the present invention, since the flap fitting concave portion has the inner wall following the outer shape of the flap, the flap is securely fitted to the flap and does not come off.

[Brief description of the drawings]

FIG. 1 is an overall side view of a package manufacturing apparatus.

FIGS. 2A, 2B, and 2C are perspective views showing a package manufacturing process.

FIG. 3 is an overall perspective view of a molding section.

FIG. 4 is a side view of a molding part.

FIG. 5 is a front view of an upper mold, a lower mold, and a guide bending mechanism of a molding unit.

FIG. 6 is a perspective view showing a guide block together with an operation.

FIG. 7 is a side view showing a guide block together with an operation.

FIG. 8 is a perspective view of the folding machine;

FIG. 9 is a side view of the folding machine;

FIG. 10 is a perspective view showing an arrangement of a folding line forming machine.

FIG. 11 is a perspective view of a folding line attaching machine and a folding mechanism.

FIG. 12 is a perspective view of a folding mechanism.

FIG. 13 is a front view of a pad member of the folding mechanism.

14A and 14B are perspective views showing a processing procedure of an end face of a semi-package.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Package manufacturing apparatus 2 Semi-package 2a Seal part 39 Folding mechanism 87 Rotation support plate 89 Pad member 90 Flap 91 Flap fitting concave part 92 93 End face pressing convex part

Claims (3)

[Claims] 1. A pair of flaps (90) formed by temporary folding on a sealing portion (2a) at an end of a package (2) in a molding process, and a package (2) in a molding process.
A folding mechanism (39) for folding the end portion of the package (2), wherein the sealing portion (2) of the package (2) in the molding process is
a) a pair of rotating support plates (87) which are arranged at positions corresponding to both side portions and rotate toward the end face side of the package (2) in the molding process, and are attached to the respective rotating support plates (87). A pad member (89) that abuts against the flap (90) and presses the flap (90) toward the end face by rotation of the rotation support plate (87). ) Folding mechanism (3
9). 2. The invention according to claim 1, wherein the pad member (89) includes a flap fitting recess (91) into which the flap (90) fits, and a flap fitting recess (91). End face pressing projections (92, 9) provided on both sides and abutting on the end faces of the package (2) in the molding process.
3) The folding mechanism (39) of the package manufacturing apparatus (1), comprising: 3. The invention according to claim 2, wherein the inner wall (91a) of the flap fitting projection (91) of the flap (90) has a shape following the outer shape of the flap (90). Package manufacturing apparatus characterized by the following (1)
Folding mechanism (39).