JPH0451996Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to a cutter device, and more specifically, a cutter device that is incorporated into an automatic packaging machine or a plastic sheet forming device and used to cut packaging materials. Regarding equipment.

<<Prior Art>> Generally, when packaging objects such as ham, bacon, sausage, etc., the objects are stored in storage recesses of a strip film in which storage recesses are formed at predetermined intervals, and the upper side of the storage recesses are stored. and sealing the packaged object by covering it with another strip-shaped film and sealing the periphery of the film around the packaged object,
Next, a package is manufactured by cutting and separating the periphery of the sealed packaged item into a substantially rectangular shape.

When the corners of the package are rounded for reasons of appearance and safety, a cutter device as shown in FIG. 6 is placed in the middle of the automatic packaging device. That is, a first corner cutter blade B has four cutting edges B' each having a predetermined radius of curvature on both sides of a thin cross cutter blade A that cuts the strip film in the transverse direction of the traveling direction, and two corner cutter blades each having four cutting edges B' each having a predetermined radius of curvature. A second corner cutter blade C having two cutting edges C' is arranged upright. By using such a cutter device,
The cross cutter blade A cuts the sealed portions of the band-shaped film at predetermined intervals in the transverse direction, and the planar shape of the first and second corner cutter blades B and C is cut at predetermined intervals at the cut portions. Each corner is rounded when the package is manufactured by punching it into a shape.

<<Problems to be solved by the invention>> However, although the cutter device described above can round each corner of the package, for example, it is easy for the user to open the package, which is a common practice in recent years. Therefore, it is not possible to form a cut line on the periphery of the package for opening. Therefore, when providing score lines on a package, in addition to the cutter device described above, a separate cutter device for forming score lines must be installed on the packaging device at a predetermined interval to perform the packaging operation. That is, two cutter devices must be provided, which not only increases the installation space, but also makes it difficult to accurately align the two cutter devices with respect to the film strip, resulting in defective packages. The problem arises that the probability increases.

This idea was created in view of the above-mentioned problems, and its purpose is to round the corners of the package while reliably cutting in the lateral direction of travel using a single cutter device. To provide a cutter device that can form a cut line for opening the package and also provide a cut line for opening the package at the peripheral edge.

<<Means for Solving the Problems>> In order to achieve the above-mentioned object, the cutter device according to the present invention includes a cross cutter blade for cutting a film provided on a substrate in the lateral direction of the traveling direction, and the cross cutter blade. a male cutter blade having a corner cutter blade having a cutting edge with a predetermined radius of curvature disposed close to both ends of the cross cutter blade; In a cutter device having a female cutter blade in which a through hole is formed that substantially corresponds to the corner cutter blade, the cross cutter blade has a slight thickness and its blade surface is inclined, and the cross cutter blade has a female cutter blade that is opposite to the cross cutter blade. At least one side of the through hole provided in the female cutter blade is slidably abutted against that of the cross cutter blade.

<<Example>> Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a side view showing an example of a packaging device in which the device according to the present invention is used, and FIGS. 2 to 4 show a preferred embodiment of the present invention.

As shown in FIG. 1, the packaging device will first be described based on FIG. The film is transported forward by a transport device 3 having film gripping claws at intervals. And the conveyance device 3
Container forming boxes 4 are arranged above and below near the loading side of the film strip 1, where the film strip 1 is heated and evacuated or compressed to form storage recesses 1a at predetermined intervals. Further, although not shown, means for feeding the object to be packaged 5 into the storage recess 1a is arranged in front of the container forming box 4 in the direction of movement. Furthermore, an original film 8 on which the lid film 7 is wound is placed above the central part of the conveying device 3.
The lidding film 7, which is continuously pulled out from the original film 8, is placed over the packaged object 5 after it is stored in the storage recess 1a of the strip film 1. A sealing device 9 provided in the packaging device 3 for sealing in the vertical and horizontal directions seals the abutting portions of the strip film 1 and the lidding film 7. After the lid film 7 is sealed to the strip film 1, the lid film 7 is also moved forward as the strip film 1 moves forward. Furthermore, a first cutter device 15 is disposed at the unloading end of the conveyance device 3, and is formed by a pair of upper and lower rotary cutters and cuts the lid films 1 and 7 almost simultaneously in a strip shape in the same direction as the traveling direction. ing. A second cutter device 20, which is a cutter device according to the present invention, is disposed between the first cutter device 15 and the seal device 9 described above.

To explain the second cutter device 20, which is an embodiment of the present invention, first, as shown in FIG. A fixed female cutter blade 22 is disposed, and a male cutter blade 24 fixed to a mounting plate 23 is disposed below the strip film 1 so as to be vertically movable. Specifically, the two are connected via a guide shaft 25, and the male cutter blade 24 can move up and down along the guide shaft 25 by operating a cylinder 26 disposed below the male cutter blade 24. It's becoming like that. Further, on the upper surface of the mounting plate 21 to which the female cutter blade 22 is fixed, there is provided a scrap storage box 28 with open top and bottom ends for storing scraps of the film punched by the second cutter device 20. .

Next, to explain each cutter blade 22, 24, as shown in FIG. Two cross cutter blades 30 arranged upright, a first corner cutter blade 31 placed between both cross cutter blades 30, and a second corner placed adjacent to the outer ends of both cross cutter blades 30. Cutter blade 3
It is formed from 2.

Next, to explain each part in detail, the cross cutter blade 30 has an extremely flat trapezoidal planar shape with sloped sides in the same direction, and the blade surface 3
0a is inclined toward the front in the direction of movement (towards the front in the figure), and the first cutting edge 30b (lower side of the single trapezoid) for cutting in the lateral direction of the direction of movement is inclined downward from the center toward both sides. It is formed into a mountain shape. Furthermore, the right angle side of the cross cutter blade 30 is a second cutting edge 3 for forming a cutting line for opening.
It is set to 0c. This is one of the features of this invention.

The first corner cutter blade 31 has a planar shape in which each side surface of a thin bar-shaped rectangular parallelepiped with a substantially square plane is cut into an arc shape, and each of the arcuate sides has a predetermined radius of curvature. Third cutting edge 31a
Configure. The first cutting edge 30b of both cross cutter blades 30 has a pair of opposing vertices adjacent to each other.
located adjacent to the end of the Further, the diagonal line connecting the other set of vertices is arranged approximately on the same line as the rotary cutter of the first cutter device 15 described above.

Further, the second corner cutter blade 32 cuts the inner surface of the rectangular parallelepiped, which has a generally rectangular plan shape extending in the film traveling direction (direction orthogonal to the cross cutter blade 30), in a generally arc shape from the center toward both ends. Both arcuate sides constitute the fourth cutting edge 32a. And both fourth cutting edges 3
The center part of the second corner cutter blade 32 that the 2a contacts is the first cutting edge 3 of both cross cutter blades 30.
It is located adjacent to the end of 0b. Further, in this embodiment, the other peripheral portion of the second corner cutter blade 32 also serves as a cutting edge, and the planar shape of the second corner cutter blade 32 has a band shape, a cover film 1,
It's starting to hit 7.

Furthermore, the fourth cutting edge 32a of the second corner cutter blade 32 and the first corner cutter blade 3
The radius of curvature of the first third cutting edge 31a is formed to be substantially the same. Further, the cutting edges 31a and 32a of the first and second corner cutter blades 31 and 32 are located on substantially the same plane, and are arranged at a slightly higher position than the first and second cutting edges 30b and 30c of the cross cutter blade 30. ing. Furthermore, the opposing surfaces of the first and second corner cutter blades 31 and 32 are strip-shaped, approximately parallel to the lid films 1 and 7, and have sharp cutting edges at their peripheral edges.

The female cutter blade 22 has a substantially rectangular planar shape as shown in FIG. cutter blade,
That is, a through hole is formed. Specifically, first and second through holes 36 and 38 having substantially the same planar shape are formed at positions facing the first and second corner cutter blades 31 and 32 provided in the male cutter blade. is drilled. Furthermore, a third through hole 40 having a trapezoidal planar shape is bored at a position facing the cross cutter blade 30.
The height and length of the lower side of the trapezoid are the same as those of the cross cutter blade 30, and the length of the upper side is slightly longer. That is,
The angle θ formed by the lower side of the third through hole 40 and the inclined side is slightly larger than the angle θ' formed between the lower side and the inclined side of the cross cutter blade 30. That is, as a result, the inclined side of the cross cutter blade 30 and that of the third through hole 40 do not come into contact with each other, and the strip-like lid films 1 and 7 cannot be cut at that point. The strip-like lid films 1 and 7 can be cut at the edges. This is also one of the features of this invention.

Furthermore, the first cutter blade provided on the female cutter blade 22
- The third through holes 36, 38, and 40 communicate with the above-mentioned waste storage box 28.

Next, the operation of this embodiment will be explained. First, as in the conventional case, while the strip-shaped film 1 is continuously pulled out and conveyed, the container forming box 4 stores two storage recesses 1a at predetermined intervals in the lateral direction.
is formed and the articles 5 to be packaged are sequentially stored in the storage recess 1a, and then the lidding film 7 pulled out from the original film 8 placed above covers the articles 5 to be packaged, so that the strip-like film is 1 and is further transported forward in that state. and,
A sealing device 9 disposed at the front in the traveling direction seals the periphery of the packaged object 5, that is, the area where the strip film 1 and the lidding film 7 are in contact with each other.
The packaged object 5 is sealed.

Next, the second cutter device 20 according to the present invention cuts each cut package at predetermined intervals in a direction perpendicular to the traveling direction, and forms rounded corners of each cut package, and also cuts a cut line for opening. form 50.
That is, when the space between the band-shaped lidding films 1 and 7 to be packaged 5 comes to the position of the second cutter device 20,
The cylinder 26 operates, the male cutter blade 24 moves upward, and the female cutter blade 22 located above
The band-shaped lid films 1 and 7 are sandwiched between them.
Then, when the cylinder 26 further extends, the first and second corner cutter blades 31, 32
enters the opposing first and second through holes 36 and 38, and is cut with a predetermined radius of curvature by the third and fourth cutting edges 31a and 32a. That is,
The planar shapes of both corner cutter blades 31 and 32 are used to punch out predetermined positions of the band-shaped lid films 1 and 7. Next, the center portion of the first cutting edge 30b of the cross cutter blade 30 enters the third through hole 40 of the opposing female cutter blade 22 and gradually cuts the band-shaped lid films 1 and 7 in the lateral direction of the traveling direction. To go.
However, since the blade surface 30a of the cross cutter blade 30 is inclined, the punch is not punched with width in the lateral direction, but is cut along the line where the first blade edge 30b contacts.

Furthermore, since the second cutting edge 30c formed on the right-angled side of the cross cutter blade 30 is inclined in the advancing direction, as the cross cutter blade 30 is embedded in the third through hole 40 of the female cutter blade 22, the second cutting edge 30c The second cutting edge 30c and the third through hole 40 slide against each other, and a cut line 50 is made in the band-shaped lid film 1, 7 by a width corresponding to the amount of insertion of the second cutting edge 30c.
is formed. However, as described above, since the inclined side of the cross cutter blade 30 does not come into contact with the third through hole 40, no cut line is formed in the band-shaped lid films 1, 7.

Then, it is transported further forward in that state,
A first cutter device 15 disposed at the discharge end of the conveying device 3 cuts the lid films 1 and 7 on the center line in the direction of travel and on both side edges, thereby cutting the lid films 1 and 7 into two rows. As a result, a package is manufactured in which each corner is rounded and a cut line 50 for opening is formed adjacent to one corner. After manufacturing, it is transported out by normal means.

In addition, in the above embodiment, the case where the items to be packaged are conveyed in two rows has been explained, but it goes without saying that the present invention is not concerned with the number of rows, and in that case, the number of rows can be increased or decreased. The number of first corner cutter blades and cross cutter blades may be increased or decreased in accordance with this.

Moreover, although the case has been described in which the cut lines are formed on the package at only one location, they can also be provided at two locations by making the slanted sides right angle sides and forming a substantially rectangular shape. Furthermore, the incision line does not necessarily have to be formed approximately perpendicularly from the periphery of the package; for example, by forming the third through hole 40 so as to approximately coincide with the inclined side 30c of the above embodiment, the incision line can be formed in an oblique direction. A score line can be formed.

Furthermore, it goes without saying that the driving source for vertical movement is not limited to a cylinder, and various changes may be made, such as reversing the vertical positions of the male cutter blade and female cutter blade. do not have.

<<Effects of the invention>> As described above, according to the cutter device according to the present invention, a single cutter device can reliably form rounded corners of a package and also provide opening holes at the periphery of the package. A score line can be provided. Furthermore, transverse cuts can also be made at the same time. Therefore, there is no need to adjust or control the position between the cutter blade that cuts in the transverse direction (the cross cutter blade of the present application) and the cutter means that forms the score line, and the score line can be reliably placed at the desired position on the package at the same time. can be formed.

Furthermore, since there is no need to separately provide cutter means for forming score lines, the installation area of the entire packaging device is reduced.

[Brief explanation of drawings]

FIG. 1 is a side view showing an example of a packaging device in which the present invention is used, FIG. 2 is a side view showing an example of a cutter device according to the present invention, and FIG. 3 is a side view showing an example of a male cutter blade. 4 is a plan view showing an embodiment of a female cutter blade, FIG. 5 is a plan view illustrating the operation, and FIG. 6 is a perspective view showing a conventional cutter device. 1... Strip film, 5... Item to be packaged, 7...
Lid film, 15...first cutter device, 2
0... Second cutter device, 22... Female cutter blade, 24... Male cutter blade, 30... Cross cutter blade, 30b... First cutting edge, 30c...
Second cutting edge, 31... First corner cutter blade, 31a... Third cutting edge, 32... Second corner cutter blade, 32a... Fourth cutting edge, 36...
...First through hole, 38... Second through hole, 40...
...Third through hole.

Claims (1)

[Scope of utility model registration request] It has a cross cutter blade for cutting the film provided on the substrate in the transverse direction of the traveling direction, and a corner cutter blade having a cutting edge with a predetermined radius of curvature, which is disposed close to both ends of the cross cutter blade. A cutter device having a male cutter blade and a female cutter blade disposed opposite to the male cutter blade and formed with a through hole that substantially matches the cross cutter blade and the corner cutter blade, the cross cutter blade The blade has a slight thickness and its blade surface is inclined, and at least one side of a through hole provided in the female cutter blade facing the cross cutter blade contacts and slides with that of the cross cutter blade. A cutter device characterized in that it can be formed.