JPH1179111A - Notch forming device for unsealing packaged bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a notch forming device for unsealing a packaging bag which is easy in changing a cutting blade by employing the die-roll system, easy for exchanging the worn blade, costless, and excellent in practicality with extremely improved maintainability. SOLUTION: In a notch forming device, a plate 5 having a blade provided with a cutting blade 4 to form a notch N for unsealing on its surface is attached on a circumferential surface of at least one roller 2 of a pair of rollers 2, 3 opposite to each other to hold a side edge seal part of continuously transferred packaging bags 1 in an attachable/detachable manner, the plate 5 having a blade is a bendable strip-like plate 5 having a blade, and attached to the circumferential surface of the roller 2 in an attachable/detachable winding condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening notch forming device for forming an opening notch in a side edge seal portion of a packaging bag made by a packaging machine.

[0002]

2. Description of the Related Art Conventional filling and packaging machines for automatically filling and packaging contents such as liquids, powders, and viscous substances include:
For example, Japanese Utility Model Publication No. 50-10284 and Japanese Patent Publication No. 5-36
As disclosed in Japanese Patent Publication No. 285/285 or Japanese Patent Publication No. 6-62134, a continuously transported film is folded back, the folded back edges are overlapped and vertically sealed, and the contents are placed in the vertically sealed film. Filling,
It is known that after the film is horizontally sealed, a cutting mechanism cuts a central portion of the horizontally sealed portion to separate and carry out the packaging bags individually.

[0003] Such a filling and packaging machine is provided with an opening notch forming device for forming a notch serving as an opening for opening at a side edge vertical seal portion of each successively transferred packaging bag, that is, an opening notch. There are many.

[0004] Such an opening notch forming apparatus is generally known in the following two types.

[0005] One is a configuration in which a rotary blade having a cutting edge at the tip is rotated on the side of the packaging bag, and a side edge seal portion of the packaging bag is cut by the tip cutting edge of the rotary blade to form a notch. .

The other is a configuration in which a pair of opposing rollers sandwich a side edge seal portion of a packaging bag, one of the opposing rollers is a die roll having a cutting edge formed on the surface, and the other roller is a receiving roller. The cutting edge of the die roll pushes the side bag sealing portion of the packaging bag to form a notch.

[0007]

However, in the former rotary blade structure, in order to adopt a structure in which the rotational speed is synchronized with the feed speed of the packaging bag in structural design or in setting and controlling the notch forming pitch, the feeding of the packaging bag is performed. When the speed is low, the rotation speed of the rotary blade is also low, and the rotary blade cannot smoothly cut the side edge of the packaging bag, which may cause snagging, which may hinder the continuous transfer of the packaging bag.

In addition, since a so-called V notch, which forms a V-shaped cut, is easier to understand and open easily than a so-called I notch, which simply forms a cut, a V-shaped blade is formed to form the V notch. In this case, the rotary blade structure has a disadvantage that it is difficult to align the blade with the V-shaped receiving hole, and it is not possible to form a notch more smoothly.

On the other hand, in the latter die roll structure, the problem of catching at a low speed and the difficulty of forming a V-notch are relatively insignificant as compared with the former, but they are much more expensive than the former rotary blade structure. . In addition, the notch shape (cutting edge shape) cannot be easily changed.

[0010] In addition, the die roll structure has a structure in which a cutting edge is pressed against a receiving roller to push it off.
The blade is easily worn.

In addition, the replacement of the die roll due to the wear is not only troublesome, but also the cutting edge is not easily polished, so that the die roll must be replaced with a new one. There is a problem inferior.

The present invention solves such a problem, and adopts a die-roll system, which facilitates replacement of cutting blades and replacement due to blade wear, does not require cost, and has a practically improved maintainability. It is an object of the present invention to provide an innovative notch forming apparatus for opening packaging bags.

[0013]

The gist of the present invention will be described with reference to the accompanying drawings.

An opening notch N is formed on the peripheral surface of at least one of the pair of opposed rollers 2 and 3 for holding the side edge seal portion of the packaging bag 1 which is continuously transferred, as a receiving roller for receiving the other roller 3. The present invention relates to a notch forming device for opening a packaging bag, characterized in that a bladed plate member 5 provided with cutting edges 4 on its surface is detachably fastened.

A bendable strip-shaped plate member 5 provided with the cutting edge 4 on its surface is detachably wound around the peripheral surface of one roller 2 of the pair of opposed rollers 2 and 3. 2. A notch forming device for opening a packaging bag according to claim 1, wherein the notch forming device is fixed.

3. The packaging bag opening notch forming apparatus according to claim 1, wherein said bladed plate member 5 is magnetically attracted and fixed to said roller 2. It is.

Further, the present invention relates to a notch forming apparatus for opening a packaging bag, wherein the cutting edge 4 is integrally formed on the surface to form the bladed plate 5.

The packaging bag according to any one of claims 1 to 4, wherein the cutting edge 4 is a V-shaped blade so that a V-shaped opening notch N is formed. The present invention relates to an opening notch forming apparatus.

Further, the cutting edge 4 is a diamond-shaped blade, and a pair of V-shaped blade portions of the diamond-shaped blade can be switched and used by changing the fixing direction of the bladed plate 5. Item 5 relates to a notch forming device for opening a packaging bag according to Item 5.

Further, in a filling and packaging machine in which the content F is filled in the film F while the film F continuously fed is subjected to a vertical seal and a horizontal seal, and the packaging bag 1 containing the content 6 is continuously packed. 7. The opposing rollers 2, 3 are arranged so that an opening notch N can be formed one after another at a side edge vertical seal portion of the packaging bag 1 containing each content 6. 8. The present invention relates to the notch forming device for opening a packaging bag according to any one of the first to third aspects.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.

At least one of the rollers 2 has a bladed plate 5 provided with a cutting edge 4 on the surface thereof, and the packaging bag continuously transferred by the opposed one roller 2 and the other roller 3. 1. Hold the side edge seal portion.

With the transfer of the packaging bag 1, each opposing roller 2,
3 rotates, the cutting edge 4 receives the other roller 3 and the roller 3
As a result, a predetermined position of the side edge seal portion is pushed out to form a notch N for opening.

When the cutting edge 4 has a different shape or when the cutting edge 4 is worn, the bladed plate 5 is replaced.

Therefore, the cutting edge 4 can be replaced very easily, and it is not necessary to replace every expensive die roll as in the prior art, but only by replacing the inexpensive bladed plate 5 having a cutting edge on the surface. Therefore, the maintenance cost can be significantly reduced.

Further, the configuration is such that the cutting edge can be easily changed to a cutting edge having various shapes and sharpness in accordance with various conditions such as the material and thickness of the film F of the packaging bag 1. When a plurality of cutting edges 4 are provided at a predetermined pitch, the pitch of the opening notches N is changed according to the shape of the packaging bag by exchanging the blades 5 with different cutting pitches. Also has an easy configuration.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

In this embodiment, each side edge vertical sealing portion of the packaging bag 1 containing the contents 6 which is provided in the following filling and packaging machine shown in FIGS. The present invention is applied to an opening notch forming apparatus for forming a notch (opening notch N) in an opening.

As shown in FIGS. 1 and 2, a film web 11 in which a film F is wound in a roll shape is detachably disposed on a side portion of a machine body 10, and a film F pulled out from the film web 11 is provided. Is given a predetermined tension via the film guide mechanism 12 and once pulled out upward, is folded in two along the film longitudinal direction by the film folding mechanism 13 provided at the upper part of the machine body 10, and is guided downwardly. It is configured as follows.

In this embodiment, a pair of vertical heat seal rollers 14A of the vertical sealing mechanism 14 vertically fold the folded edge portion, the intermediate portion, and the folded edge portion of the folded film F which is drawn downward and conveyed. Is vertically heat-sealed (both the left and right edges and the middle part), and then the vertical sealing mechanism is used.
Horizontal heat sealing is performed by a first horizontal sealing mechanism 15 and a second horizontal sealing mechanism 16 which are disposed below 14. In this case, first, a pair of horizontal heat sealing rollers 15A of the first horizontal sealing mechanism 15 perform horizontal heat sealing at a predetermined interval in the horizontal direction. A cylindrical bottom having a bottom is formed, and the bottom is filled with the contents 6 from the filling nozzle portion 17A of the filling mechanism 17, and subsequently, after the film F is sent out, the horizontal heat of the first horizontal sealing mechanism 15 is formed. The sealing roller 15A seals the portion of the film F which becomes the bag opening to form the packaging bag 1 containing the contents 6, and then the horizontal heat sealing portion is connected to the horizontal heat sealing roller 16A of the second horizontal sealing mechanism 16. After the horizontal heat sealing is performed again, the packaging bag 1 containing the contents 6 is successively conveyed downward in a successively packed state.

In this embodiment, the first horizontal sealing mechanism 15 and the second horizontal sealing mechanism 16 are provided in two stages below the vertical sealing mechanism 14 as described above.
A notch forming device P for opening according to the present invention is disposed on the lower left and right sides of 5 and 16, respectively, and further, a perforation for separating is provided in the central vertical seal portion of the packaging bag 1 arranged side by side on the lower left and right sides. An eye forming device Q is provided, and further below this is provided a cutting mechanism 18 for sequentially cutting and separating and carrying out the horizontal seal portions of the packaging bag 1 in the vertically wrapped state.

Therefore, in the present embodiment, the left and right opening notch forming devices P move the film to the predetermined positions of the vertical sealing portions on both side edges of each packaging bag 1 along with the film draw-out transport (continuous transport of the packaging bag 1). When the opposing rollers 2 and 3 rotate, the opening notches are cut one after another.

The opening notch forming apparatus P in this embodiment, which is the gist of the present invention, will be specifically described below.

A pair of opposing rollers 2 and 2 are located at positions to sandwich the vertical seal portions on both side edges of the packaging bag 1 which is continuously transferred.
3 is mounted on a shaft.

Each of the opposing rollers 2 and 3 is configured to be driven and rotated in synchronization with the feed speed of the film F (packaging bag 1).

The bladed plate 5 is fixed to one of the opposed rollers 2 and 3 so as to function as a conventional die roll, and the other roller 3 functions as a receiving roller. Make up.

In the present embodiment, the cutting blades 4 are formed on a bendable strip-shaped metal blade-shaped plate member 5 protruding from the surface at predetermined intervals, and the positioning portion of the one opposing roller 3 is formed. 7 and is wound and fastened.

Further, in this embodiment, the opposing roller 3 is magnetized, and the metal blade plate 5 is attracted and adhered by this magnetic force to be detachably fastened. It is configured so that it can be peeled off and replaced.

Therefore, if the spare bladed plate 5 which has been polished in advance is prepared, even if the cutting blade 4 is worn due to repeated use, the opposed roller 3 itself (die roll itself) is replaced with a new roller as in the prior art. It is only necessary to simply peel off the bladed plate 5 and fasten another new bladed plate 5 without replacing it, and the replacement is easy and the replacement cost can be greatly reduced.

That is, since the bladed plate 5 is extremely inexpensive as compared with a conventional bladed roller (die roll), the bladed plate 5 itself can be disposable and used. Replacement is possible, and maintainability is greatly improved. Of course, instead of being disposable, the worn cutting edge 4 may be polished again and used again.

As described above, the bladed plate member 5 is a flexible plate which is so-called flexible and employs a magnetic attraction system which can be simply pasted and peeled off. In addition, the replacement work can be performed more quickly.

In this embodiment, the cutting edge 4 is formed integrally on the surface of the metal plate by pressing or etching, so that the cost can be further reduced.

A plurality of cutting blades 4 are provided on the surface of the bladed plate 5 at predetermined intervals (predetermined formation pitches). However, bladed plates 5 having different formation pitches are prepared in advance, and By exchanging, the formation position of the opening notch N can be adjusted according to the shape of the packaging bag and the like without performing complicated transfer control.

In this embodiment, the cutting edge 4 is a V-shaped blade in order to form a V-shaped so-called V-notch N in which the position of the cut is easy to understand and easy to open. When it is desired to replace the cutting edge with a different cutting edge, it is possible to simply and inexpensively change the cutting edge by preparing the bladed plate member 5 on which various cutting edges 4 are formed in advance.

In this embodiment, the cutting edge 4 is
A V-shaped notch N is formed by using a V-shaped blade portion on one side, and if worn, the blade-equipped plate 5 is removed, the direction of the blade is changed, and the V-shaped notch is fastened. It is configured so that it can be used by switching to the V-shaped blade portion on the opposite side, so that the maintenance cost for abrasion replacement can be further reduced.

Further, in this embodiment, the roller 2 which is pivotally supported with respect to the shaft portion 9 in the longitudinal direction is adjusted with respect to the shaft portion 9 in order to adjust the cut amount of the V notch N according to the material of the packaging bag 1 or the width dimension of the vertical sealing portion. It is configured so that it can be moved, adjusted, and fixed along. That is, the cut amount is set as shown in FIG. 8 or FIG. 9 by setting the dimension of the wrap margin between the side edge vertical seal portion of the packaging bag 1 and the cutting edge 4 composed of the V-shaped blade portion.

Further, in this embodiment, one bladed plate 5 is wound around the roller 3 just one round so that the end portions abut each other. In addition, a positioning step edge 7A is provided as a positioning section 7 for fastening the bladed plate 5 around which one side edge of the bladed plate 5 contacts.
Around the bladed plate material 5 for just one round along A, fasten,
The cutting edges 4 are set at equal intervals so as to be at appropriate positions.

The cutting edge 4 in the circumferential direction of the roller 2
The positioning mark M is formed on the side of the fixed portion of the bladed plate 5 of the roller 2 so that the phase position of the roller 2 can be positioned.

In the embodiment described above, one film F
Of the vertical seal mechanism in which the folded end portion folded in half and the center portion and the folded end portion (both right and left edges and an intermediate portion) of the folded film F form a pair. An example has been described in which the packaging bag 1 is formed into a tubular bag in two rows by being vertically heat-sealed by three vertical heat-sealing rollers. For example, the packaging bag 1 is formed by sealing the film F on three sides. Or a film F consisting of two sheets is superposed and guided out, and both ends of each film F are heat-sealed in the vertical direction by two vertical heat-sealing rollers, and the four sides of the film F are heat-sealed and packaged. A bag for forming a bag 1 or a plurality of vertical heat seal rollers provided in a vertical seal mechanism, and a number of packages sealed four-sided by the vertical heat seal roller and the horizontal seal mechanism. In such as those forming the bag 1,
By forming the opening notch of the present invention in each of the obtained packaging bags, an easily opened packaging bag can be constituted.

[0050]

Since the present invention is constructed as described above, the notch can be formed smoothly even if the packaging bag is conveyed at a low speed. It is not necessary to change every die roll,
Simply removing the plate with a blade and fixing another plate with a blade makes it easy and inexpensive to replace, significantly reducing maintenance costs compared to the conventional example, and greatly improving maintainability. It becomes a notch forming apparatus for opening a simple packaging bag.

Further, the present invention not only replaces a cutting edge with a new one as described above, but also replaces a cutting edge with a different shape.
An epoch-making notch forming apparatus for opening packaging bags, which is extremely practical and facilitates the exchange of various cutting edges, such as changing the notch forming pitch, and can be realized quickly at low cost.

According to the second aspect of the present invention, the replacement is further facilitated and the bladed plate can be securely fixed.

According to the third aspect of the present invention, the replacement can be further facilitated and performed more quickly, and it is not necessary to provide a fastening structure.
Excellent mass productivity.

According to the fourth aspect of the present invention, the plate material with a single blade can be further reduced in cost and can be formed into a sharp cutting edge. The performance is also improved.

According to the fifth aspect of the present invention, it is possible to form a V notch in which the unsealing position is easy to understand and easy to open.
Moreover, even if the packaging bag is transported at a low speed, the V-notch can be formed smoothly and reliably, and furthermore, as described above, the exchange of cutting edges can be easily performed and the packaging bag can be manufactured at a low cost. It becomes a notch forming device for opening.

Further, in the invention according to the sixth aspect, by simply changing the fastening direction of the bladed plate material, the worn V-shaped blade portion can be used instead of a worn another V-shaped blade portion, and further maintenance cost can be used. A notch forming apparatus for opening a packaging bag, which is more practical and can reduce the amount of water, can be obtained.

According to the seventh aspect of the present invention, notches can be successively formed at predetermined positions in the contents-containing packaging bags that are successively formed by the packaging machine, and furthermore, the epoch-making filling exhibiting the above-described functions and effects. A packaging machine can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory perspective view of a filling and packaging machine of the present embodiment.

FIG. 2 is a schematic explanatory front view of the filling and packaging machine of the present embodiment.

FIG. 3 is an explanatory perspective view of a main part of the embodiment.

FIG. 4 is an explanatory front view of a main part of the embodiment.

FIG. 5 is an explanatory side sectional view of a main part of the embodiment.

FIG. 6 is an explanatory perspective view showing a state in which the bladed plate portion is partly pulled off from the roller of the present embodiment.

FIG. 7 is an enlarged explanatory view of a part of the bladed plate material of the present embodiment.

FIG. 8 is an explanatory view showing that a wrap margin with a cutting edge of the present embodiment is increased to form a deep V notch.

FIG. 9 is an explanatory view showing that a lap margin with a cutting edge of the present embodiment is reduced to form a shallow V notch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Roller 3 Roller 4 Cutting edge 5 Plate material with blade 6 Contents F film N Notch for opening (notch)

Claims (7)

[Claims] 1. A cutting blade which forms an opening notch as a receiving roller on the peripheral surface of at least one of a pair of opposing rollers for sandwiching a side edge seal portion of a continuously transferred packaging bag. A notch forming device for opening a packaging bag, wherein the plate material provided with the blade provided in the above is detachably fastened. 2. A bendable strip-shaped plate member provided with the cutting edge on its surface is detachably wound around a peripheral surface of one of the pair of opposed rollers. The notch forming device for opening a packaging bag according to claim 1. 3. The notch forming device for opening a packaging bag according to claim 1, wherein the bladed plate material is magnetically attracted and fixed to the roller. 4. A notch forming apparatus for opening a packaging bag, wherein said cutting edge is integrally formed on a surface to form said bladed plate. 5. The cutting blade according to claim 1, wherein the cutting blade is a V-shaped blade so that a V-shaped opening notch is formed.
The notch forming apparatus for opening a packaging bag according to any one of claims 4 to 4. 6. A diamond-shaped blade as the cutting edge, and a pair of V-shaped blade portions of the diamond-shaped blade can be switched to be used by changing a fastening direction of the plate member with the blade. A notch forming device for opening a packaging bag according to the above. 7. The packaging bag with each of the contents in a filling and packaging machine in which contents are filled in the film while applying a vertical seal and a horizontal seal to the film which is continuously transferred, and the packaging bags with the contents are continuously packaged. The notch for opening a packaging bag according to any one of claims 1 to 6, wherein the opposing rollers are arranged so that opening notches can be formed one after another at a side edge vertical seal portion. apparatus.