JPH1170904A - Rotary drive mechanism of folding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify and miniaturize folding equipment by rotating every folding device by one driving source and one rotary drive mechanism. SOLUTION: This rotary drive mechanism 80 is so structured that two flaps of a semipackage, a plurality of which are parallelly supported, are folded in opposite directions to each other. In this case, first and second follow-up shafts 63, 64, first and second follow-up gears 65, 66, a driving shaft 83, first and second driving gears 84, 85, first rack member 86 having first follow-up side rack parts 88, 89 and first drive side rack part 92, and second rack member 87 having second follow-up side rack parts 90, 91 and second drive side rack part 93 are provided. By this, when the drive shaft 83 rotates, the first and the second rack members 86, 87 slide in opposite directions, the first and the second follow-up shafts 63, 64 rotate in opposite directions and the first folding device and the second folding device attached to the same rotate in opposite directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary drive mechanism used for manufacturing and packing various kinds of packaging containers, and for folding and closing a flap and a lid member of the container.

[0002]

2. Description of the Related Art A packaging material in which contents such as milk and juice are enclosed is made of paper material in which resin material is laminated on both front and back surfaces for the purpose of reducing the weight of the package and reducing the price. in use.

The manufacturing process of a package is divided into a first process in which a semi-package as an intermediate is manufactured and a second process in which a final package as a finished product is manufactured.

In the first step, a plate-like packaging material is supplied in the longitudinal direction, and both ends in the width direction of the packaging material are longitudinally sealed in the longitudinal direction to form a cylinder, and the cylinder is filled with contents. Then, the upper and lower positions are cut after being horizontally sealed in the width direction. Thus, a plate-shaped semi-package having a predetermined thickness filled with the contents is manufactured.

In a second step, the sides of the semi-package are pressed by a mold of a stamping mechanism to form a desired polygonal prism such as a hexagon or an octagon, and two sides are formed at both ends of the semi-package. The folded flaps are folded in opposite directions (directions facing each other) and welded to the end faces. As a result, a final package as a finished product is manufactured.

[0006] A thermoplastic resin is laminated on the surface of the packaging material. When the flap is welded to the end face, the flap and the end face are heated by a heating device to melt the thermoplastic resin on the surface. The two flaps are folded in opposite directions by a folding device and pressed. Thereby, the thermoplastic resin of the flap and the end face are welded to each other.

[0007]

Here, in the second step, since the two flaps are folded in opposite directions,
The folding device is provided with a first folding tool for pressing one flap and a second flap for pressing the other flap.

However, it is necessary to rotate the first folding tool and the second folding tool in opposite directions. For this reason, it becomes necessary to separately provide a rotary drive mechanism corresponding to both folding tools and to provide a plurality of drive sources on both end surfaces of the semi-package.

In particular, when a plurality of semi-packages are processed at the same time, since a rotary drive mechanism is required for each semi-package, a plurality of driving sources are likely to be required in design.

Accordingly, an object of the present invention is to simplify and reduce the size of a folding device by enabling all folding tools to be rotated by one drive source and one rotary drive mechanism.

[0011]

In order to achieve the above-mentioned object, according to the present invention, two opposed flaps (5, 5) integrally projecting from one end face (6) are provided. A workpiece (1) having a first folding tool (6) that presses and folds one of the two flaps (5, 5)
1) and a second folding tool (62) that presses and folds the other one are provided corresponding to the end face (6), and the first folding tool (61) and the second folding tool (62) are provided. Is a rotation driving mechanism (80) of a folding device in which the two flaps (5, 5) are folded in the opposite direction by rotating in the opposite direction, the rotation driving mechanism being connected to the first folding tool (61). A first driven shaft (63) that rotates in conjunction with the first folding tool (61)
And a second driven shaft (6) connected to the second folding tool (62) and rotating in conjunction with the second folding tool (61).
4) provided on the first driven shaft (63);
A first rotating shaft integrally rotating with the first driven shaft (63);
And the second driven shaft (6).
4), a second driven gear (66) that rotates integrally with the second driven shaft (64), and a driving source (8).
Drive shaft (83) driven to rotate in conjunction with 2)
A first drive gear (8) provided on the drive shaft (83) and rotating integrally with the drive shaft (83).
4) and a second driven gear (85), and a first driven rack portion (88, 8) meshing with the first driven gear (65).
A first rack member (86) slidably provided having a first drive-side rack portion (92) meshing with the first drive gear (84); The second driven rack portion (9) meshing with the driven gear (66)
0, 91) and a second rack member (87) slidably provided having a second drive-side rack portion (93) meshing with the second drive gear (85). ,
When the drive shaft (83) rotates, the first rack member (92) and the second rack member (92) are connected to the first rack member (86) and the second rack member (93). The first driven rack portion (88, 89) is disposed at a position where the rack member (87) is slid in the opposite direction.
And the second driven side rack portion (90, 91),
When the first rack member (86) and the second rack member (87) slide in the opposite directions, the first folding tool (61) and the second folding tool (62) are rotated in the opposite directions. Characterized in that it is arranged at a position where it is to be made.

According to a second aspect of the present invention, there is provided the rotary drive mechanism (80) of the folding device according to the first aspect, wherein the first folding tool (61) and the second folding tool (62) are provided. Are provided respectively corresponding to both end faces (6, 6) of the workpiece (1), and the first rack member (86) is a second rack member corresponding to one of the both end faces (6, 6). 1 folding tool (61)
A first driven side rack portion (88) that meshes with the first driven gear (65) of the first driven shaft (63) connected to the first driven shaft (63), and corresponds to the other of the two end faces (6, 6). A first driven gear (65) of the first driven shaft (63) connected to the first folding tool (61) to be engaged with the first driven gear (65). The second rack member (87) is provided with a second driven gear (2) of a second driven shaft (64) connected to a second folding tool (62) corresponding to one of the end faces (6, 6). 66) and one second driven side rack portion (90) that meshes with the both end surfaces (6, 66).
The second driven gear (6) of the second driven shaft (64) connected to the second folding tool (62) corresponding to the other of the second driven gear (6).
6) and a second driven-side rack part (91) on the other side that meshes with the second driven-side rack part (91).

According to a third aspect of the present invention, there is provided the rotary drive mechanism (80) of the folding device according to the second aspect, wherein the first driven shaft (63) and the second driven shaft (6) are provided.
4) extend substantially parallel to the drive shaft (83), and the first rack member (86) and the second rack member (87) are substantially perpendicular to the drive shaft (83). It is formed in a plate shape having a longitudinal direction along the intersecting direction, is stacked at a predetermined interval in the axial direction of the drive shaft (83), and is slidably supported along the longitudinal direction. The first driven rack portion (8
8) and the first driven rack portion (89) on the other side extend along the longitudinal direction on each of both side portions in the width direction of the first rack member (86), and extend on the one side. The second driven rack part (90) and the second driven rack part (91) on the other side.
Means extending along the longitudinal direction on each of both widthwise side portions of the second rack member (87), and
The rack member (86) and the second rack member (87) each have a drive shaft insertion portion (94, 95) through which the drive shaft (83) is inserted, and the first drive rack portion (94). 92) and the second drive rack portion (93) are opposed to each other and the drive shaft insertion portion (9
4, 95) are extended along the longitudinal direction on the respective inner wall surfaces.

According to the first to third aspects of the present invention, when the drive shaft (83) is rotated by one drive source (82), the first drive gear (84) and the second drive gear (8) are rotated.
5) rotates while meshing with the first drive side rack part (92) and the second drive side rack part (93), respectively.
The first rack member (86) and the second rack member (8)
7) slides in the opposite direction, and the first driven rack portion (88, 89) and the second driven rack portion (90, 9).
The first driven gear (65) and the second driven gear (66) meshing with 1) respectively rotate in the opposite directions, and pass through the first driven shaft (63) and the second driven shaft (64). The first folding tool (61) and the second folding tool (62) rotate in opposite directions, and the two flaps (5, 5) are folded in opposite directions.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rotary drive mechanism of a folding device according to the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view showing a molding welding portion 4 of a package manufacturing apparatus 3 according to this embodiment, FIG. 2 is a perspective view showing a state of a package, and FIG. 1 shows a package 1, (b) shows a semi-package 1 before flap welding, and (c) shows a final package 2 after flap welding. FIG. 3 is an enlarged perspective view of a main part of the molding welding portion 4 of FIG. 1, FIG. 4 is a perspective view showing a state where the pressing and heating device 30 of FIG. 3 has advanced, and FIG. 53, 54
FIG. 6 is a perspective view showing a state in which is closed, and FIG.
7 is a perspective view showing a state in which the first and second folding tools 61 and 62 and the flap 5 in the folding process are shown.
FIG. 8 is a perspective view showing the state of FIG.
9 is an exploded perspective view showing first and second driven shafts 63 and 64 and first and second driven gears 65 and 66.
Is a perspective view showing the drive shaft 83, the first and second drive gears 84 and 85, and the first and second rack members 86 and 87 of the rotary drive mechanism 80 in FIG. 1, and FIG. FIG. 4 is a perspective view of a main part showing a part of a drive mechanism 80 in a cross section.
Since the flaps 5 are provided on both end faces, the pressing and heating device 30 is originally provided on both front and rear sides of the embossing mechanism 10, but the drawing becomes complicated, so that Is not shown in each figure. In the following description, components not denoted by reference numerals are not shown.

The manufacturing process of the package includes a first process in which a semi-package 1 (see FIG. 2A), which is an intermediate being formed, is manufactured, and a final package 2 (see FIG. 2 (b)) and a second step of manufacturing the package manufacturing apparatus 3.
Is used in the second step.

In the first step, the sheet-like packaging material is supplied to the filling machine in the longitudinal direction, and both ends in the width direction of the packaging material are longitudinally sealed in the longitudinal direction to form a cylinder. Contents such as tea and tea are filled in a predetermined amount, and are cut after the upper and lower positions are horizontally sealed in the width direction. As a result, a substantially plate-shaped semi-package 1 (see FIG. 2A) having the seal portions 1a and 1b at both ends and having a predetermined thickness is manufactured.

In the second step, the semi-package 1 (see FIG. 2A) filled with a predetermined amount of contents is formed into a predetermined shape by the package manufacturing apparatus 3 and the final package 2 (FIG. 2 ( c)) and sent out to the next process such as a boxing process or an inspection process.

The package manufacturing apparatus 3 includes a standby section, a molding welding section 4, and a delivery section, which are arranged on the base 3a in order from the filling machine side. Semi-packages 1 are sequentially sent from the filling machine to the standby section. In the forming welding portion 4,
The semi-package 1 transported from the standby section is formed into a predetermined shape, and a final package 2 having a final shape as a finished product is formed. In the sending section, the final package 2 is sent to the next step. Further, the semi-package 1 is transferred from the standby section to the molding welding section 4 by the package manufacturing apparatus 3.
And a final package transfer mechanism for transferring the final package 2 formed into a predetermined shape by the forming and welding section 4 to the sending section. The package manufacturing apparatus 3 is for processing a plurality of (six in this embodiment) semi-packages 1 into a final package 2 at the same time.

As shown in FIG. 2 (a), the semi-package 1 supplied from the filling machine to the standby section 15 is substantially plate-shaped having a predetermined thickness filled with the contents, and has a longitudinal direction. Both ends have seal portions 1a and 1b extending in the lateral direction.

The semi-package transport mechanism has a plurality of (six in this embodiment) semi-package conveyors. The semi-package conveyors extend from the standby section to the forming and welding section 4 in the transport direction of the semi-package 1 and are arranged side by side in a direction crossing the transport direction of the semi-package 1. A plurality of carriers projecting sideways are fixed to the semi-package conveyor. The distance between the adjacent carriers before and after in the transport direction corresponds to the length of the semi-package 1, and the seal portions 1a and 1b of the semi-package 1 are supported by the adjacent carriers before and after from below.

As shown in FIG. 2 (b), the sealing portions 1a and 1b at both ends of the molding welding portion 4 are bent and
And four flaps 5 (two at each end face 6) are formed, the side part 1c is bent along the fold line 1d to form a polygonal column shape, and each flap 5 is welded to the end face 6. Thus, a polygonal cylindrical final package 2 as shown in FIG. 2C is formed. The final package 2 is transported to the sending unit by the final package transport mechanism.

As shown in FIG. 1, the forming and welding portion 4 includes a stamping mechanism 10, a pressing and heating device 30, and a folding device 60.
And a guide bending mechanism. These embossing mechanisms 1
0, the press-heating device 30, the folding device 60, and the guide bending mechanism are provided corresponding to each of the six semi-packages 1 conveyed in parallel, and the six semi-packages 1 are simultaneously attached to the final package 2. Processed.

As shown in FIG. 3, the mold pressing mechanism 10 includes an upper mold 11, a lower mold 12, an elevating mechanism 13 (see FIG. 1), and a mold clamping mechanism 14.

The upper mold 11 and the lower mold 12 are each divided into two parts so as to be openable and closable in the horizontal direction, and the whole mold is divided into four block bodies 15, 16, 17, 18 and two substrates 19, 20. I have. The upper mold 11 has two block bodies 1
The lower die 12 is composed of two block bodies 17 and 18 and a substrate 20 disposed therebetween. Upper mold 11
The inner widths of the two block bodies 15 and 16 and the two block bodies 17 and 18 of the lower mold 12 in the separated state are respectively larger than the width of the plate-shaped semi-package 1 (see FIG. 2A). Is also set to be slightly larger. The mold clamping mechanism 14 is provided in a direction in which the two block bodies 15 and 16 of the upper mold 11 are attached in a state where they face each other, and the two block body support parts 21 and 22 are brought into contact with and separated from the block body support parts 21 and 22. And a mold clamping drive mechanism that is moved to open and close.

The elevating mechanism 13 raises and lowers the lower mold 12 so as to approach and separate from the upper mold 11. In the first position where the lower mold 12 is lowered most, the two block bodies 17 and 18 are moved.
Is located at a lower portion of the semi-package transport mechanism in a separated state, and is inserted between the separated block body support portions 21 and 22 at a second raised position to face the upper mold 11 at a predetermined distance. I do. The lower mold 12 is inserted between two adjacent carriers of the semi-package transport conveyor while ascending from the first position to the second position. Lower mold 1
When the block 2 reaches the second position,
When the 22 is closed, the two blocks 15, 15 of the upper mold 11 are closed.
The two block bodies 17 and 18 of the lower die 6 and the lower die 12 are close to each other, and the upper die 11 and the lower die 12 are clamped.

When the lower mold 12 rises from the first position, the side 1c (see FIG. 2A) of the substantially plate-like semi-package 1 supported between the carriers is housed between the block bodies 17 and 18. Then, it is supported by the substrate 20 from below and is raised. When the lower mold 12 reaches the second position, the semi-package 1 is housed between the upper mold 11 and the lower mold 12.

The guide bending mechanism is provided within the movement trajectory of the seal portions 1a and 1b (see FIG. 2A) on both sides in the longitudinal direction of the semi-package 1 which is raised from the first position to the second position by the lower die 11. Is provided. The ascending seal portions 1a and 1b of the semi-package 1 move in the grooves,
As a result, the semi-package 1 is positioned at a predetermined position in the longitudinal direction in the lower mold 12, and the seal portions 1a, 1b
Are respectively bent in the same direction, and end faces 6 at both ends in the longitudinal direction and two flaps 5 projecting integrally from the end faces 6 are provided.
(See FIG. 2B).

The pressing and heating device 30 includes a base body 31, a first
, A second pressing body 33, a heater 34, a nozzle 35, and a folding line attaching mechanism 50.

The first pressing member 32 and the second pressing member 33 are pressed against the end surface 6 of the semi-package 1 by pressing the first pressing member 32 and the second pressing member 33.
And a second pressing surface. The nozzle 35 and the second pressing body 33 are fastened and fixed to the base body 31, and the first pressing body 32 is fastened and fixed to the nozzle 35 so as to face the second pressing body 33.

The heater 34 includes a heater built in a substantially columnar case 41, an air supply unit 42 provided at one end of the case 41 and supplied with pressurized air, and a heater air provided at the other end of the case 41. And a blow-out part for blowing out.

The nozzle 35 has a hole-shaped inflow portion into which the blowout portion of the heater 34 is inserted, and a plurality of outflow-side holes 46 opening toward a contact portion between the flap 5 and the end surface 6. I have. The outflow side hole 46 communicates with the inflow portion, and the heated air from the heater 34 flows out through the outflow side hole 46.

The folding line attaching mechanism 50 attaches a folding line (hereinafter referred to as a "folding line") of the flap 5, and includes an upper movable portion 51, a lower movable portion 52, a pair of upper folding line attaching tools 53, and a pair of upper folding line attaching tools 53. A lower folding line attaching tool 54 and a movable portion driving mechanism are provided.

The upper movable portion 51 and the lower movable portion 52 have a pair of connecting arms 57 and 58, respectively. The connecting arms 57 and 58 are attached to shaft portions 59 protruding from both side surfaces 31c of the base body 31. It is rotatably supported. A movable part drive mechanism is connected to one end of the upper and lower movable parts 51 and 52. The movable part drive mechanism causes the upper and lower movable parts 51 and 52 to swing about a shaft 59, and the movable parts 51 and 52 The other end moves in the approaching direction.

The upper and lower folding members 53 and 54 are fastened and fixed to mounting plates 55 and 56, respectively.
Are supported by the other end portions of the upper and lower movable parts 51 and 52 via elastic members, and in this state, the upper and lower folding line attaching tools 53 and 54 are provided.
When the upper and lower movable portions 51 and 52 swing about the shaft portion 59, the upper and lower folding tool 53 and 54 open and close.

The upper folding tool 53 has three contact surfaces facing in different directions continuously formed by ridges, and the lower folding tool 54 has two contact faces facing in different directions. It is formed continuously by the ridge line.

The base body 31 is connected to a pressing and heating device driving mechanism, and the pressing and heating device 30 is moved toward and away from both ends of the embossing mechanism 10 in the longitudinal direction by the pressing and heating device driving mechanism. In a state where the pressing and heating device 30 is closest to the embossing mechanism 10, the end surface 6 of the semi-package 1 housed between the upper die 11 and the lower die 12 is moved to the first and second pressing surfaces 32.
a, 33a press.

Next, the embossing mechanism 10 and the pressing and heating device 3
The molding process using No. 0 will be described.

The semi-package 1 conveyed to the molding welding section 4 by the semi-package conveying mechanism moves upward with the side 1c supported by the lower mold 12 rising from the first position. The ascending semi-package 1 is positioned at a predetermined position in the lower mold 12 by the guide bending mechanism, and the seal portions 1a and 1b are bent in the same direction to form the end face 6 and the two flaps 5 at each position. You. When the lower mold 12 reaches the second position, the semi-package 1 is accommodated between the upper mold 11 and the lower mold 12.

Next, the front and rear pressing and heating devices 30 advance from both sides and approach the embossing mechanism 10 (see FIG. 4).
And the end surface 6 of the semi-package 1 is pressed by the second pressing surface. Then, the block body support portions 21 and 22 are closed, the upper mold 11 and the lower mold 12 are clamped, and the side 1c of the semi-package 1 is arranged in an octagonal prism shape, and the space between the end face 6 and the side 1c is formed. Is formed with a slightly sharper corner than at a right angle. During this time, the folding line attaching mechanism 50 is operated, and the upper and lower folding line attaching members 53 and 54 are closed (see FIG. 5). As a result, the flap 5 is sandwiched between the contact surface of the upper folding tool 53 and the contact surface of the lower folding tool 54 so that the flap 5 is formed into a substantially triangular thin plate. A strong fold line is formed between them. Further, the outflow side holes 45, 46 of the nozzle 35
, The heated air flows out, and the portion of the end face 6 and the flap 5 where the two come into contact is heated. Then, after the upper and lower folding lines 53 and 54 are opened and the pressing and heating device 30 is retracted, a folding step described later is performed.

As shown in FIGS. 4 to 6, the folding device 6
Reference numeral 0 denotes a first and second folding tool 61, 62 and a rotation drive mechanism 80 including first and second driven shafts 63, 64, first and second driven gears 65, 66, and the like. Have. The rotation drive mechanism 80 rotates the first driven shaft 63 and the second driven shaft 64 in opposite directions, and the details will be described later.

First and second driven shafts 63 and 64
Are rotatably supported by being inserted through upper portions of both ends of the block support portions 21 and 22, respectively.
One end (lower end in the drawing) 63a, 64a of each of the upper and lower dies 11 and 63 is located above the end of the upper die 11 (upper end in the drawing).
63b and 64b protrude above the block support portions 21 and 22 (see FIG. 3). Both driven shafts 63, 64
Is set in a direction substantially perpendicular to the longitudinal direction of the semi-package 1 stamped by the upper mold 11 and the lower mold 12 (a direction substantially parallel to the formed end face 6).

The first and second driven gears 63, 64 are fixed to the outer periphery of the other end portions 63b, 64b of the first and second driven shafts 63, 64 projecting above the block support portions 21, 22. Have been. First and second driven gears 65,
The driven shaft 66 is driven to rotate in the opposite direction, whereby the driven shafts 63 and 64 are driven in the opposite directions (the directions of arrows A1 and A2 in FIG. 3).
To rotate.

As shown in FIG. 7, the folding tools 61, 62
One end portions 63a, 64a of the driven shafts 63, 64 (FIG. 3)
), And pad members 69, 70 fixed to the bent surfaces 67a, 68a of the rotation support plates 67, 68. Rotation support plate 6
Reference numerals 7 and 68 are provided at positions facing both sides of the flap 5 of the semi-package 1. Driven shaft 63, 6
4 is the first direction (directions of arrows A1 and A2 in FIGS. 3 and 7)
When rotated, the rotation support plates 67 and 68 rotate in the direction in which the flap 5 is folded to close the ends of the upper mold 11 and the lower mold 12 from both sides (see FIG. 6), and the second support is opposite to the first direction. When rotated in the direction, the ends of the upper mold 11 and the lower mold 12 are opened (see FIGS. 4 and 5). In addition, the molding process is performed by the upper mold 1
This is performed in a state where the ends of the lower mold 1 and the lower mold 12 are opened.

The pad members 69 and 70 are provided on the flap fitting concave portions 71 and 72 to be fitted to the flap 5, and are provided on both sides of the flap fitting concave portions 71 and 72.
Are formed by end face pressing projections 73 and 74 that press the end face 6 (the part where the flaps 5 do not overlap). In this case, the inner walls of the flap fitting concave portions 71 and 72 are formed in accordance with the outer shape of the flap 5, so that the flap 5 can be reliably housed inside.

The first and second folding tools 61, 6
As shown in FIG. 8, the upper mold 11 and the lower mold 12 correspond to the both end faces 6 of the six semi-packages 1 supported in parallel by the six sets of the upper mold 11 and the lower mold 12. There are six sets on one side and six sets on the other side, for a total of 12 sets.

As shown in FIGS. 8 to 10, one unit of the rotary drive mechanism 80 includes the first driven shaft 63, the second driven shaft 64, the first driven gear 65,
The first having the second driven gear 66, the driving shaft 83, the first driving gear 84, the second driving gear 85, the first driven rack portions 88 and 89, and the first driving side rack portion 92. Of the rack member 86 and the second driven rack portions 90 and 91
And a second rack member 87 having a second drive-side rack portion 93. The first driven shaft 63, the second
, The driven shaft 64, the first driven gear 65, and the second driven gear 66 are provided 12 each.

The drive shaft 83 is connected to a motor 82, which is a drive source fixed to the base 3a (see FIG. 1), and is driven to rotate by the motor 82. First and second
Are fixed to the outer periphery of the drive shaft 83, and rotate together with the drive shaft 83.

The first driven shaft 63, the second driven shaft 64, and the drive shaft 83 are both connected to the lower mold 12 (FIG. 3).
3), and these three types of shafts 63, 64, 83 are arranged substantially in parallel. Further, the first driven shaft 63 and the second driven shaft 64 are arranged on one side and the other side of the upper mold 11 and the lower mold 12 so as to be substantially linearly arranged in a line of six each.

All the first driven gears 65 and the first driving gears 84 are fixed to predetermined positions of the first driven shaft 63 and the driving shaft 83 so as to be located substantially in the same plane. 2nd driven gear 66 and 2nd drive gear 8
5 is fixed to a predetermined position of the second driven shaft 64 and the drive shaft 83 so as to be located on the same plane apart from the setting surface of the first driven gear 65 from the upper die 11 and the lower die 12. I have. The first driven shafts 63 and the second driven shafts 64 facing each other in the longitudinal direction of the semi-package 1 are connected via connecting members 81 and 82, respectively. Note that the first driven shaft 63
The second driven shaft 64 is rotatable with respect to the connecting members 81 and 82.

The first rack member 86 and the second rack member 87 are formed in a plate shape having a longitudinal direction along a direction crossing the drive shaft 83 substantially perpendicularly. The two rack members 86 and 87 are connected to the drive shaft 8 so that the first rack member 86 is closer to the second rack member 87.
3 are arranged at predetermined intervals in the axial direction. Both rack members 86, 87 are slidably supported on the base 3a along the longitudinal direction.

The first driven rack portions 88 and 89 extend along the longitudinal direction on one side and the other side in the width direction of the first rack member 86, respectively, and the first driven rack portion on one side is provided. Reference numeral 88 denotes a first driven shaft 63 connected to a first folding tool 61 corresponding to one of both end surfaces 6 of the semi-package 1.
And the first driven rack portion 89 on the other side is connected to the first folding tool 61 corresponding to the other one of the two end surfaces 6 of the semi-package 1 by the first driven shaft 63. Is arranged so as to mesh with the first driven gear 65. Similarly, the second driven rack portions 90 and 91
The second driven rack portion 9 on one side extends along one of the width direction of the rack member 87 and the other side thereof along the longitudinal direction.
0 meshes with a second driven gear 66 of a second driven shaft 64 connected to a second folding tool 62 corresponding to one of both end surfaces 6 of the semi-package 1, and a second driven rack portion on the other side. Reference numeral 91 is provided so as to mesh with the second driven gear 66 of the second driven shaft 64 connected to the second folding tool 62 corresponding to the other one of the two end faces 6 of the semi-package 1.

The first rack member 86 and the second rack member 87 are formed with hole-shaped drive shaft insertion portions 94 and 95 through which the drive shaft 83 is inserted.
Each of the drive shaft insertion portions 94 and 95 has a pair of inner wall surfaces extending along the longitudinal direction and facing each other. The first drive rack portion 92 is provided with the drive shaft insertion portion 9.
4, extending along the longitudinal direction on one inner wall surface,
It is in mesh with the first drive gear 84. The second drive rack 93 extends along the longitudinal direction on the other inner wall surface of the drive shaft insertion portion 95 (the side opposite to the first drive rack 92), and the second drive gear 85. And are engaged.

The first drive side rack portion 92 and the second drive side rack portion 93 are disposed at the above-described positions because the first rack member 86 is provided when the drive shaft 83 rotates in one direction.
And the second rack member 87 are slid in the opposite direction. In addition, the first driven rack portions 88, 8
9 and the second driven side rack portions 90 and 91 are disposed at the above-mentioned positions, when the first rack member 86 and the second rack member 87 slide in the opposite direction, the adjacent first This is because the first driven shaft 63 and the second driven shaft 64 are rotated in opposite directions, and the first folding tool 61 and the second folding tool 62 fixed thereto are rotated in opposite directions. Therefore, the first and second rack members 86, 87
And the first and second driven side rack portions 88, 89,
90, 91, the first and second drive side rack portions 9
The positions of 2, 93 are not limited to the above-mentioned shapes and positions, but may be any positions capable of causing the same operation as described above.

Next, the folding process by the folding device 60 will be described.

When the pressing and heating device 30 is retracted (see FIG. 6), the driving shaft 83
Have rotated in one direction (the direction of arrow B in FIG. 10), and the first drive gear 84 and the second drive gear 85 have engaged with the first drive side rack portion 92 and the second drive side rack portion 93, respectively. The first rack member 86 and the second rack member 87 rotate in the opposite direction (the first rack member 86 is in the direction of arrow C in the drawing, and the second rack member 87 is in the direction of arrow D in the drawing).
The first driven gear 65 and the second driven gear 66 meshed with the first driven rack portions 88 and 89 and the second driven rack portions 90 and 91 respectively move in opposite directions (arrows in the figure). A1 and A2 directions), and the first folding tool 61 and the second folding tool 62 are opposed to each other via the first driven shaft 63 and the second driven shaft 64 (directions of arrows A1 and A2 in the figure). ) To rotate.

As a result, as shown in FIG. 7, the rotation supporting plates 67, 68 rotate toward the end face 6 of the semi-package 1, and the flaps 5 are fitted into the flap fitting recesses 71, 72 and pressed. The abutting portions of the semi-package 1 that are folded on the end face 6 and heated by the heated air are brought into contact with each other and welded to form a final package 2 (see FIG. 2C) as a finished product. . The final package 2 formed in this way is transported to the sending section by the final package transport mechanism.

In FIG. 3, the pressing and heating device 30 and the folding device 60 provided on one side of the embossing mechanism 10 corresponding to the sealing portion 1a on one side of the semi-package 1 have been described. A similar pressing and heating device and a folding device are also provided for the side seal portion 1b.

According to the present embodiment, all the first and second folding tools 61 and 61 provided in a large number are rotated in a desired direction by one motor 82 and one rotation driving mechanism 80. be able to. Therefore, the folding device 60
The structure can be simplified and downsized.

[0060]

As described above, claims 1 to 3 are described.
According to the invention described in (1), all of the first folding tool and the second folding tool can be rotated by one drive source and one rotary drive mechanism, so that the structure of the folding device is simplified and the size is reduced. Can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a forming welding portion of a pressing and heating device according to the present embodiment.

FIG. 2 is a perspective view showing a state of a package, and FIG.
Shows a semi-package filled with contents, (b) shows a semi-package before flaps are welded,
(C) shows the final package after the flap is welded.

FIG. 3 is an enlarged perspective view of a main part of a molding welding portion in FIG. 1;

FIG. 4 is a perspective view showing a state in which the pressing and heating device of FIG. 3 has advanced.

FIG. 5 is a perspective view showing a state in which the upper and lower folding line attachments of FIG. 4 are closed.

FIG. 6 is a perspective view showing a state where the folding tool of FIG. 5 is closed.

FIG. 7 is a perspective view showing a state of first and second folding tools and a flap in a folding step.

FIG. 8 is an exploded perspective view showing first and second driven shafts and first and second driven gears of the rotary drive mechanism of FIG. 1;

FIG. 9 shows a drive shaft and a first shaft of the rotary drive mechanism of FIG.
FIG. 6 is a perspective view showing a second drive gear and first and second rack members.

10 is an essential part perspective view showing a part of the rotation drive mechanism of FIG. 1 in a cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Semi-package (package in process of molding) 3 Package manufacturing device 5 Flap 6 End face 60 Folding device 61 First folding tool 62 Second folding tool 63 First driven shaft 64 Second driven shaft 65 First driven gear 66 second driven gear 80 rotation drive mechanism 82 motor (drive source) 83 drive shaft 84 first drive gear 85 second drive gear 86 first rack member 87 second rack member 88 first driven side rack Part (one side) 89 First driven side rack part (other side) 90 Second driven side rack part (one side) 91 Second driven side rack part (other side) 92 First drive side rack part 93 2nd drive side rack part 94 drive shaft insertion part 95 drive shaft insertion part

Claims (3)

[Claims] 1. A workpiece (1) having two opposing flaps (5, 5) integrally projecting from one end face (6) is supported, and the two flaps (5, 5) are supported. ) And a second folding tool (62) that presses and folds one side of the first folding tool (61) corresponding to the end face (6). Tools (61)
And a second folding tool (62) rotating in the opposite direction to fold the two flaps (5, 5) in the opposite direction. Driven shaft (63) connected to the tool (61) and rotating in conjunction with the first folding tool (61)
A second driven shaft (64) connected to the second folding tool (62) and rotating in conjunction with the second folding tool (61);
A first driven gear (65) provided on the first driven shaft (63) and rotating integrally with the first driven shaft (63); and a second driven shaft (64) provided on the second driven shaft (64). A second driven gear (66) that is provided and rotates integrally with the second driven shaft (64); a driving shaft (83) that is driven to rotate in conjunction with a driving source (82); A first drive gear (84) and a second drive gear (85) provided on a shaft (83) and rotating integrally with the drive shaft (83) mesh with the first driven gear (65). A first driven rack portion (88, 89) and the first drive gear (84);
And a first rack member (86) having a first driving side rack portion (92) meshed with the first rack member (86) slidably movable.
A second driven rack portion (90, 91) meshing with the second driven gear (66); and the second drive gear (85).
A second rack member (87) having a second drive-side rack portion (93) that meshes with the second rack member (87) provided slidably.
The first drive-side rack portion (92) and the second drive-side rack portion (93) are configured such that when the drive shaft (83) rotates, the first rack member (86). And the second rack member (87) are slid in the opposite direction, and the first driven rack portion (88, 89) and the second driven rack portion (90, 91) When the first rack member (86) and the second rack member (87) slide in opposite directions, the first folding member (61) and the second folding member (62) A rotation drive mechanism (80), wherein the rotation drive mechanism (80) is disposed at a position to rotate the rotation in the opposite direction. 2. The rotary drive mechanism (80) for a folding device according to claim 1, wherein the first folding tool (61) and the second folding tool (62) are arranged on the work piece (80). The first rack member (86) is provided corresponding to both end faces (6, 6) of 1), respectively.
6). The first driven gear (6) of the first driven shaft (63) connected to the first folding tool (61) corresponding to one of the driven gears (6).
5) one side first driven side rack portion (88) that meshes with
A first driven gear (65) of a first driven shaft (63) connected to a first folding tool (61) corresponding to the other one of the end faces (6, 6); 1 driven side rack part (89), and the second rack member (87) has the both end faces (6,
6), the second driven gear (6) of the second driven shaft (64) connected to the second folding tool (62) corresponding to one of the second driven gears (6).
6) one second driven side rack portion (90) that meshes with
A second driven gear (66) of a second driven shaft (64) connected to a second folding tool (62) corresponding to the other one of the end faces (6, 6). A rotation drive mechanism (80), comprising: two driven rack portions (91). 3. The rotary drive mechanism (80) of a folding device according to claim 2, wherein the first driven shaft (63) and the second driven shaft (64) are both the drive shaft (83). ), The first rack member (86) and the second rack member (8).
7) is formed in a plate shape having a longitudinal direction along a direction substantially perpendicular to the drive shaft (83), and is overlapped at a predetermined interval in the axial direction of the drive shaft (83). And the first driven rack portion (88) on the one side and the first driven rack portion (89) on the other side are supported by the first rack member. (8
6) extending along the longitudinal direction on both sides in the width direction, wherein the second driven rack part (90) on one side and the second driven rack part (91) on the other side are: The second rack member (8
The first rack member (86) and the second rack member (8) are respectively extended along the longitudinal direction on both sides in the width direction of (7).
7) includes drive shaft insertion portions (94, 95) through which the drive shafts (83) are inserted, respectively, and includes the first drive rack portion (92) and the second drive rack portion (93). A rotary drive mechanism (80), which extends along the longitudinal direction on the inner wall surface of each of the drive shaft insertion portions (94, 95) located opposite to each other.