JPS643725B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application This invention is a packaging machine that uses two types of webs with different transverse fold line intervals to change the height of a finished container corresponding to the same interval. This invention relates to a folding device that folds a web along a pre-formed fold line to form a crease in a packaging machine that manufactures two types of containers having different contents.

BACKGROUND ART AND PROBLEMS Generally, in the field of packaging operations, it is common practice to form containers at different heights and to change the capacity of the container depending on the height of the container. This is limited to cases where the packaging material is a blank that has been previously formed into a certain shape, and is rarely seen in packaging materials that have a continuous web shape as in the present invention. The reason for this is that when the packaging material is a web, the packaging process from the web to forming the final container is more complex than when the packaging material is a blank, and it is difficult to deal with the web in each process. This is because it was hot.

In order to form containers to different heights, it is necessary to prepare a plurality of types of webs with different crease line intervals corresponding to the heights, and to prepare a plurality of corresponding folding rollers. and,
If the web is replaced, the folding rollers must be changed accordingly. In order to accomplish this, it is conceivable to have the folding roller removably supported on a suitable support member and to replace the folding roller manually by an operator, but this is troublesome.

In addition, in the field of food packaging work,
Aseptic packaging has now become common sense. This is accomplished by a sterile packaging machine that performs the packaging operations in a sealed chamber that isolates the required space from the outside air. In aseptic packaging machines, the entire folding roller of the folding device will be covered by a closed chamber. If the folding rollers are to be replaced manually as described above, the sealed chamber must be provided with a working opening that is normally closed, and the rollers must be replaced through that opening. However, if this is done, outside air will flow into the sealed chamber through the opening, which will impair the sterility inside the chamber.

The object of the present invention is to provide a web folding device for a packaging machine which solves the above-mentioned problems.

Means for Solving the Problems The web folding device according to the present invention is capable of folding two types of webs with different intervals between transverse fold lines and changing the height of the finished container corresponding to the same interval. In a packaging machine for producing two types of containers of different quantities, a horizontal rotating shaft supported across both side walls of a closed sterile chamber through which the web passes, and with one end projecting outward from one side wall. and two folding rollers, each corresponding to two types of webs, which are attached via arms to both sides of the horizontal rotation axis in parallel with the horizontal axis of rotation and can move forward and backward with respect to the bending position, and which are moved forward to the bending position. In order to wrap the web around one of the two folding rollers, guide rollers are arranged upstream and downstream of the folding roller in the web movement path, and guide rollers fixed to the protruding end of the horizontal rotating shaft are provided. and a handle for moving either one of the two folding rollers to the folding position,
Each folding roller is formed with an edge extending in the axial direction and matching the fold line of the corresponding web.

Function The web folding device according to the present invention comprises a horizontal rotating shaft supported across both side walls of a sealed sterile chamber through which the web passes, and one end of which projects outward from one side wall; Two folding rollers corresponding to two types of webs are attached to both sides of the rotating shaft via arms in parallel with the rotating shaft and can move forward and backward with respect to the folding position, and two folding rollers that are advanced to the folding position. guide rollers arranged upstream and downstream of the folding roller in the web movement path so that the web is wound around any one of the rollers; and a folding roller fixed to the protruding end of the horizontal rotating shaft. and a handle for moving either one of the webs to the folding position.Therefore, among the two types of webs having different intervals between transverse fold lines, the width of the fold line has a crease line interval corresponding to the height of the finished container to be manufactured. The web is fed into the sealed sterile chamber, and the folding roller corresponding to the fed web is advanced to the folding position by rotating the horizontal rotating shaft by operating the handle.

Since each of the two folding rollers is formed with an axially extending edge that coincides with the crease line of the corresponding web, the web can be bent in a predetermined direction from the crease line.

Example Embodiments of the invention will be described with reference to the drawings.

FIG. 7 shows the packaging material web 11. The web 11 is made of paper having thermoplastic synthetic resin layers on both sides. Fold lines 12 are formed in the web 11 extending in the width direction and alternately spaced at two large and small intervals A and B in the length direction. Above web 11
The distance A between the large edges of the fold line 12 corresponds to the height H of the completed container 13 finally formed into a rectangular parallelepiped shape as shown in FIG. This approximately corresponds to the thickness T. That is, one finished container 13 is formed from a web 11 having a length C, which is the sum of the distance A between the large ribs and half the distance B between the small ribs on both sides of the web 11.

Completed container 13 has a content capacity of 200ml and 250ml.
There are two types, and these two types can be obtained by changing only the height H. For this purpose, two types of webs 11 are prepared with different distances A between the large sides of the fold lines 12.

4 to 6 show the entire packaging machine including the device according to the invention. Here, in this specification, front and rear are defined as referring to FIG. 4, with the right side being the front and the left side being the rear, and left and right being facing forward.

The packaging machine is a web 11 wound into a coil.
The web 11 is provided with an unwinding device 21 for rewinding the web 11 upward, and a sterilizing device 22 disposed above the unwinding device 21 for sterilizing the unwound web 11. Also, the web 11 is transferred from the unwinding device 21 to the sterilizing device 22.
A sealing tape feeding device 23 for pasting the sealing tape on one edge of the web 11 is disposed on the way to the web 11. A sealed rear sterile chamber 24 and a front sterile chamber 25 are provided from above to the front of the sterilizer 22. The web 11 that has exited the sterilizer 22 is introduced upward into the rear sterile chamber 24 from the bottom wall thereof, and is guided forward through the upper portions of the rear sterile chamber 24 and the front sterile chamber 25.
It is guided downward within the front sterile chamber 25 and guided downward from the bottom wall of the chamber 25. A web folding device 26 is disposed in the upper part of the front sterile chamber 25, and the web 11 is folded by the folding device 26.
A crease is created by folding the paper along the crease line 12. A tube forming device 27 and a filling device 28 are arranged below the folding device 26 in the front sterile chamber 25 .
The creased web 11 is formed into a tube 14 by the tube forming device 27 by overlapping and joining both edges thereof, as shown in FIG. The inside of the tube 14 is filled with contents to a certain level. Front sterile chamber 25
A first container forming device 29 is arranged below the tube 1 filled with the contents.
4 was sent in lengths corresponding to one container, divided into lengths, and closed at both ends so as to form a V-shape in cross section, as shown in Figure 8B. It is designed to be molded into a flat cylindrical unfinished container 155. Further, a second container forming device 30 is attached to the first container forming device 29, so that the flat cylindrical unfinished container 15 can be formed at the top of the container, as shown in FIG. 9A. The ends thereof are folded flat so that a pair of triangular ears 16 protrude horizontally. A container conveyor 31 is arranged from below to in front of the first and second container forming devices 29 and 30, and
A third container forming device 32 is disposed on the conveyance path, so that the unfinished container 15 whose one end is folded flat can be folded flat at the other end, i.e., as shown in FIG. The end of the wall that forms the bottom of the container is folded flat so that a pair of triangular ears 17 protrude horizontally. An inclined chute 33 is disposed between the first and second container forming devices 29, 30 and the container conveyor 31, so that from the first and second container forming devices 29, 30 to the container conveyor 31, Unfinished containers 15 are adapted to be delivered with their bottom edges up. Further, a fourth container forming device 34 is disposed in front of the third container forming device 32 on the conveyance path of the container conveyor 31, so that the rectangular parallelepiped unfinished container 15 with ears shown in FIG. As shown in FIG. 9C, the top triangular lug 16 is bent to overlap the side surface of the finished container 13, and the bottom triangular lug 17 is bent and fixed thereto so as to overlap with the bottom surface of the finished container 13, thereby forming the finished container 13. It's summery. The completed container 13 is
Discharge device 35 located at the end of the conveyor conveyance path
Accordingly, it is discharged from the conveyor 31.

The outline of the entire packaging machine has been described above, but among the above devices, the devices other than the web folding device 26 are not directly related to the gist of the present invention, so detailed explanation thereof will be omitted.

The web folding device 26, as shown in Figs.
9 through a bearing 64 and supported by the horizontal rotating shaft 61 with one end protruding outward from the side wall 39; and arms 62 on both sides of the horizontal rotating shaft 61 parallel to the horizontal rotating shaft 61; , 63 and which correspond to the two types of webs that can move forward and backward with respect to the folding position, and the two folding rollers 41 and 42 that have been advanced to the folding position.
Web 1 to any one of the rollers 42
guide rollers 47 and 48 disposed upstream and downstream of the folding roller 41 in the web movement path so that the web 1 is wound around the folding roller 41, and two folding rollers 41 and 42 fixed to the protruding end of the horizontal rotating shaft 61. Each of the folding rollers 41 and 42 has edges 43 to 4 that match the fold line 12 of the corresponding web 11 and extend in the axial direction.
6 is formed.

Among the two types of webs 11 prepared above, the distance A between the large sides of the fold line 12 of one web 11 and the distance between the large sides of the two edges 43 and 44 of the first folding roller 41 in the circumferential direction. match, and the distance A between the large sides of the crease line 12 of the other web 11 and the second folding roller 42
The intervals between the two edges 45 and 46 in the circumferential direction are the same. In addition, two types of web 11
The distance B between the small edges of the fold line 12 is the same, and the distance B between the small edges in the circumferential direction of the edges 41 to 43 of both folding rollers 41 and 42 corresponds. In FIG. 1, of the first and second folding rollers 41 and 42, the former is disposed below the horizontal rotating shaft 61 and the latter is disposed above the same, and the first folding roller 41 is advanced to the folding position. , a web 11 is wrapped around this. On the other hand, the second folding roller 42 is in a position retreated from the folding position. The first guide roller 47 is located directly above the second folding roller 42 , and the second guide roller 48 is located directly above the first guide roller 4
It is located diagonally below and behind 7. A tension roller 49 is disposed diagonally above and behind the first folding roller 47 to give tension to the web 11 wound around the first folding roller 47.
Web 11 wrapped around guide roller 48
so as to press against the second guide roller 48,
A press roller 50 is arranged behind the second guide roller 48. Both the tension roller 49 and the press roller 50 are attached to the tips of swingable arms 51 and 52, respectively. Both arms 51,5
The base ends of the rollers 50 and 50 are fixed to horizontal shafts 53 and 54, respectively, and the tension roller 50 and the presser roller 50 are operated by hydraulic cylinders 55 and 56 connected to the horizontal shafts 53 and 54 via links. is biased to perform the above action.

In the middle of the length of the arm of the handle 65,
A positioning ball 66 is provided to project inward. By fitting this ball 66 into a notch (not shown) provided on the outer surface of one side wall 39 of the front sterile chamber 25, both folding rollers 4
Either one of 1 and 42 is positioned at the bending position.

A web positioning operation shaft 67 is provided concentrically with the extension of the central axis of rotation of the first folding roller 41 in the folding position. Operation axis 6
7 passes through the other side wall 38 of the front sterile chamber 25 and is supported by a cylindrical guide member 68 attached thereto so as to be freely movable in the axial direction. A knob 69 is attached to the protruding end of the operating shaft 67. A compression coil spring 70 is installed between the knob 69 and the cylindrical guide member 68, and this spring 70 allows the operation shaft 67 to be constantly moved into the sterile chamber 2.
It is biased in the direction protruding from 5. Although not shown in detail, the first bending roller 4 of the operation shaft 67
The end facing the folding roller 41 is detachably connected to the folding roller 41. When the operating shaft 67 is rotated with the two connected, the bending roller 41 rotates together with the operating shaft 67. In this manner, by rotating the folding roller 41 from outside the sterile chamber 25, the edges 43, 44 of the folding roller 41 and the fold line 12 of the web 11 are aligned at the start of the operation.

Rotary disks 71 and 72 are respectively attached to one ends of both folding rollers 41 and 42 so as to rotate together. Rotating disks 71, 72
is provided with a slit (not shown), and by detecting this slit with a phototube (not shown), the rotation angle of the folding rollers 41, 42 is detected.

The web 11 that has been guided forward and approximately horizontally from the rear inside the front sterile chamber 25 is wrapped around the first guide roller 47 and hangs down, and is wrapped around the first folding roller 41 in the folding position.
It rises diagonally backward, is wound around the second guide roller 48, and then hangs down from the second guide roller 48. The web 11 is transferred to the first container forming device 29.
The web 11 moves forward by being pulled downward by the web 11, and the moving web 11 rotates the first folding roller 41 around which it is wound. When the web 11 passes around the first folding roller 41 while rotating, the edges 43 and 44 of the first folding roller 41 are pressed along the fold line 12 of the web 11. As a result, the web 11 is folded along the crease line 12.

If a deviation occurs in the relative position between the fold line 12 of the web 11 and the edges 43, 44 of the first folding roller 41 during operation, it is corrected as follows. The rotation angle of the folding roller 41 is detected by the rotating disk 71 as described above. This detected angle is compared with the reference angle when no positional deviation has occurred, and the first position of the web 11 is adjusted by a predetermined amount according to the difference between the two angles.
The feed rate by the container forming device 29 is adjusted.

FIG. 3 shows the detailed shape of the folding roller. However, here, both folding rollers 41, 4
2, the first folding roller 41
shows.

As described above, the two large and small distances between the edges 43 and 44 match the large and small distances A and B between the fold line 12 of the web 11. Both edges 43,4
4 are two smooth curves 82, 8 that extend outward from one side to the other.
They are connected by 3. Of both curves 82 and 83, one includes a circular arc having a predetermined radius R1 in the middle of its length, and the other includes a circular arc having a radius R2 larger than the radius R1 over its entire length. Contains.

Effects of the Invention According to the present invention, the folding roller corresponding to the web to be folded out of the two types of webs prepared according to the heights of the two types of containers is advanced to the folding position by a handle from outside the sterile chamber. Therefore, the folding rollers can be replaced very easily from outside the sterile chamber without compromising its sterile state.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3 is an explanatory diagram showing the detailed shape of the folding roller. Fig. 4 is a side view of the entire packaging machine including the device according to the present invention, Fig. 5 is a front view thereof, Fig. 6 is a plan view thereof, Fig. 7 is a perspective view of the web which is the packaging material, FIG. 9 is an explanatory view showing the container forming process. 11... web, 12... fold line, 13... finished container, 25... sterile chamber, 38, 39... side wall,
41, 42...Bending roller, 43-46...Edge, 47, 48...Guide roller, 61...Horizontal rotating shaft, 62, 63...Arm, 65...Handle,
A, B...interval.

Claims (1)

[Scope of Claims] 1. From two types of webs 11 with different intervals A between transverse fold lines 12, two types with different contents can be created by changing the height of the finished container 13 corresponding to the same interval A. In a packaging machine for manufacturing containers, a horizontal rotating machine is supported across both side walls 38 and 39 of a closed sterile chamber 25 through which the web 11 passes, and has one end projecting outward from the side wall 39. A shaft 61, and two folding rollers 41, 42, which are attached to both sides of the horizontal rotating shaft 61 via arms 62, 63 in parallel thereto, and which correspond to two types of webs, which can move forward and backward with respect to the folding position.
The web 11 is placed upstream and downstream of the folding roller 41 in the web movement path so that the web 11 is wound around one of the two folding rollers 41 and 42 that have been advanced to the folding position. guide roller 47,
48, and a handle 65 which is fixed to the protruding end of the horizontal rotating shaft 61 and moves either one of the two folding rollers 41, 42 to the folding position. A web folding device in which edges 43 to 46 are formed which coincide with the fold line 12 and extend in the axial direction.