JP3671475B2 - Window pasting film sealing method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for heat-sealing a window pasting film at a spout provided on a base sheet constituting a paper container, and an apparatus therefor.
[0002]
[Problems to be solved by the invention]
Conventionally, in a paper container containing a liquid such as juice, a spout is opened in advance in the base material (the unfolded state before being formed as a container) constituting the paper container so that the opening operation can be easily performed. A spout is formed by covering the spout with a large window pasting film from the outlet, forming a through hole in the window pasting film, and attaching a peelable sealing material to the perforated hole. .
[0003]
The spout portion is formed continuously, and FIG. 6 shows the process. In the figure, a base material sheet 1 having a continuous base material is fed from a base material supply section A, and a film sheet 2 for cutting and forming a window pasting film is supplied from a film supply section B in the same manner. Then, the window pasting film 4 having a predetermined shape is cut and formed in the punched portion 3 in a separable manner. And the said base material sheet 1 and the film sheet 2 are piled up so that the window pasting film 4 may be made to correspond to a spout.
Reference numeral 5 denotes a seal head, and 6 denotes a seal receiver, which is an apparatus for heat-sealing the window pasting film to the base material side. In between, the film sheet 2 and the base sheet 1 move intermittently, and when the window pasting film and the spout are located between them, the seal receiver 6 rises and the seal head 5 The window pasting film is heat sealed to the periphery of the spout by the action of the seal head 5. After the heat sealing, the seal receiver 6 moves backward and returns to open the base sheet and the film sheet, and these move.
In the film sheet 2 in which the window pasting film 4 is heat-sealed on the spout side of the base sheet 1, the window pasting film is connected to the surplus part by pulling up the surplus part 7 that becomes a scrap. The connecting portion is divided, the window pasting film remains on the base sheet side, and the excess portion 7 is wound up. Moreover, the base material sheet | seat 1 which heat-sealed the window sticking film to each spout is also wound up.
[0004]
However, in the above sealing method, as shown in FIG. 7, the lower seal receiver 6 is represented by a stage (a) before the start of ascent, a heat seal stage (b), and a stage after the end of the seal (c). As described above, since the film sheet 2 and the base sheet 1 are pushed upward from their moving height positions C and D during the heat sealing, the film sheet is likely to move relative to the base sheet, so that the window There is a disadvantage that the degree of sealing becomes unstable due to the occurrence of misalignment of the attached film.
[0005]
Therefore, in view of the above circumstances, an object of the present invention is to eliminate relative movement of a film sheet with respect to a base sheet when heat sealing is performed, and an object thereof is to appropriately heat seal a window pasting film. .
[0006]
[Means for Solving the Problems]
The present invention has been made in consideration of the above problems, and a base sheet for a paper container having a spout opening opened between a seal head and a seal receiver that are provided relative to each other, and a window pasted on the base sheet. The film sheet formed by cutting the film in a separable manner is moved intermittently, and the spout of the base sheet and the window sheet film of the film sheet are positioned between the seal head and the seal receiver, In a sealing method in which the seal head and the seal receiver are overlapped and the window pasting film is heat-sealed to the spout and the spout is covered with the window pasting film, the moving heights are separated from each other on the fixed position of the seal receiver. The base sheet and the film sheet are moved in the vertical position, and the film sheet with the window pasting film corresponding to the seal receiver is restrained, and the seal sheet is lowered. Before stacking the doors, they are pushed down from the respective moving height positions together with the base sheet and placed on the upper surface of the seal receiver, and the window sticking film is heat sealed to the spout side by the lowered seal head, and then the seal head is Ascending and returning to the standby position, the film sheet is restrained as the seal head ascends and returned to its moving height position, and the spout is removed by vertical separation from the base sheet when the film sheet is ascending and returning. A window-sealing film sealing method characterized in that the window-sealing film heat-sealed on the side is separated from the film sheet, and this method is provided to eliminate the above-mentioned problems.
[0007]
In addition, the second invention is a paper container base sheet in which a spout is opened between a seal head and a seal receiver that are provided vertically relative to each other, and a window pasting film that can be separated from the base sheet. In a device in which a film sheet formed by cutting is placed and the window sheet film is heat sealed to the spout side by sandwiching the base sheet and the film sheet by overlapping the seal head and seal receiver The base sheet and the film sheet, which are separated from each other in the moving height position, are passed between the seal holder and the seal head which is located above the seal receiver and can be moved up and down. A push-down means for pushing down the base sheet and the film sheet toward the seal receiving side before the stacking is provided so as to protrude and retract on the seal head. It is made of a plate material provided on the side and the lower surface side corresponding to the push-down means so as to be able to be lowered. And a restraining means for raising and returning the film sheet to a moving height position while restraining the film sheet as the push-down means rises. This sealing apparatus is provided to solve the above problem. Is.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described in detail based on the embodiment shown in FIGS.
FIG. 1 shows a continuous window pasting apparatus in which the sealing method of the present invention is implemented as part of the process. Similarly to the conventional example, the base sheet 1 is sent out from the base supply section A, and the film sheet 2 is supplied from the film supply section B. In the film sheet 2, the punching section 3 is shown in FIG. As shown, the window pasting film 4 is formed so as to be separable into multiple rows. The window pasting film 4 is not completely punched out in the punched portion 3, and is continuously held in the surplus portion 7 by a plurality of joints 8.
[0009]
The film sheet 2 in which the window pasting film is cut and formed and the base sheet 1 are sent close to each other and are sent to the temporary seal portion 9, and the window pasting film is temporarily fixed to the spout side at the temporary seal portion 9. After the heat sealing is performed and the film sheet is divided, the surplus portion 7 of the film sheet 2 is wound up after being fed from the temporary seal portion 9. And the base material sheet 1 of the state which temporarily fixed the window sticking film is sent out to this seal part 10, this seal | sticker is performed by the seal head 5 provided with the convex part according to a spout shape, and a reliable window sticking film is made. Fixing is performed. After passing through the main seal portion 10, the base sheet 1 is wound up.
[0010]
In the present invention, the temporary seal portion 9 is used. In the temporary seal portion 9, as shown in FIG. 3, the film sheet 2 and the base sheet 1 which are separated from each other in the moving height positions C and D are passed between the base sheet 1 and the base sheet 1. A fixed position seal receiver 6 is disposed in the lower part, and a seal head 5 provided relative to the seal receiver 6 is disposed so as to be movable up and down above the film sheet 2. A seal device 11 is constituted by the seal receiver 6.
As shown in FIGS. 3 and 4, the seal head 5 corresponds to the spouts arranged in the width direction of the base sheet 1 and the window pasted films arranged in the width direction of the film sheet 2, A plurality of head portions 12 are provided. In addition, the seal head 5 includes a plurality of push-down means 15 that are provided with a bar-like pusher 13 biased downward by a spring 14 so as to be movable up and down, and a lower end of the push-down means 15. 16 protrudes downward from the lower surface of the head portion 12.
[0011]
Further, a restraining means 19 is provided in which a lower plate material 17 is disposed on the upper surface side of the base sheet 1 and an upper plate material 18 is disposed on the upper surface side of the film sheet 2 in a position corresponding to the push-down means 15. . In this restraining means 19, the upper plate material 17 and the lower plate material 18 that correspond to each other in the vertical direction extend in the width direction of the base sheet 1 and the film sheet 2, and between the upper and lower ends thereof. The spring 20 is disposed and connected, and the end portion of the lower plate member 17 is connected and supported by the support portion 22 via the spring 21. In the restraining means 19, as described later, the upper sheet material 18 and the lower sheet material 17 are pushed down to restrain the film sheet 2 while moving the film sheet 2 and the base sheet 1 to their respective moving heights. The state is lowered from the positions C and D to be arranged on the upper surface of the seal receiver 6 and the state is maintained, and the upper plate member 18 and the lower plate member are resisted by the springs 20 and 21 as the pressing force is released. 17 rises to a certain height while restraining the film sheet 2 and returns to the original position, and the base sheet 1 and the film sheet 2 return to the moving height position.
[0012]
As described above, in the sealing device 11, the seal receiver is fixed in position, and the seal head that performs heat sealing on the seal receiver can be moved up and down, and further, a means for pressing down the base sheet and the film sheet And a means for arranging and holding the film sheet together with the base sheet in a state in which the film sheet is constrained on the seal receiving side, and heat sealing by this sealing device 11 (which is a temporary seal in this embodiment) is as follows. This is done.
First, the film sheet 2 and the base sheet 1 are moved between the seal receiver 6 and the seal head 5 at the respective moving height positions C and D, and the spout 23 of the base sheet 1 and the window pasted film of the film sheet 2 4 is intermittently moved so as to be positioned at a predetermined position on the seal receiver 6, and the spout 23 and the window pasting film 4 are positioned on the seal receiver 6 to move the base sheet 1 and the film sheet 2. Is paused.
[0013]
Next, the seal head 5 starts to descend, but before the seal head 5 comes into contact with the film sheet 2, the lower end 16 of the push-down means 15 pushes down the restraining means 19 against the springs 20 and 21 (FIG. 5 (b), (b)). Since the upper plate member 18 and the lower plate member 17 of the restraining means 19 are pushed down, the upper plate member 18 and the lower plate member 17 first restrain the film sheet 2 from the vertical direction, and in that state, descend from the moving height position C. Then, the lower plate material 17 comes into contact with the substrate sheet 1 and pushes it down, and the substrate sheet 1 and the film sheet 2 are arranged and held on the seal receiver 6 (FIG. 5C). ).
After the substrate sheet 1 and the film sheet 2 are constrained, the sealing head 5 descends and comes into contact with the window pasting film 4 and pressurizes and heats to heat seal the window pasting film 4 to the spout 23 side ( FIG. 5 (D)). At this time, the pusher 13 in the push-down means 15 is relatively moved to the upper position due to the reduction of the spring 13.
[0014]
After the heat sealing, the sealing head 5 starts to recede upward, and when the sealing head 5 is separated from the window pasting film 4 by a certain distance, the push-down means 15 also rises. At this time, the restraining means 19, that is, the upper plate material 18 and the lower plate material 17 are moved upward as the push-down means 15 rises in a state where the film sheet 2 is restrained from above and below. The connection of the window pasting film 4 to the surplus portion 7 is cut by the rise of 19 and the window pasting film 4 itself remains on the outlet side of the base sheet (FIG. 5 (e)).
When the seal head 5 is raised and the push-down means 15 is separated from the restraining means 19, the upper plate material 18 and the lower plate material 17 of the restraining means 19 return to the original standby position, and the film sheet 2 is moved to the moving height position C. To return to. Since the restraining means 19 returns to the standby position, the base sheet 1 is also unconstrained from the upper side and returns to its moving height position D.
When the temporary sealing of the window pasting film is completed as described above, the base sheet and the film sheet are moved again, the next spout and the window pasting film are positioned at predetermined positions, and the above sealing operation is performed again.
[0015]
【The invention's effect】
With the configuration of the present invention described above, before the seal head is lowered, the base sheet is lowered from the moving height position in a state where the film sheet in which the window pasting film is cut is constrained from above and below by the restraining means. At the same time, it is arranged and held on the seal receiving side, so that the positional deviation from the base sheet does not occur when the film sheet is pushed down, so that proper heat sealing can be performed. In addition, after sealing, the film sheet is cut back to the moving height position by the restraining means, so that the window-bonded film is cut off from the film sheet. It is effective.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a continuous window pasting apparatus for carrying out the present invention during a process.
FIG. 2 is an explanatory view showing a film sheet.
FIG. 3 is an explanatory view showing an example of the sealing device of the present invention from one side.
FIG. 4 is an explanatory view showing another example of the sealing device from another side surface.
FIG. 5 is an explanatory view showing heat sealing of a window pasting film.
FIG. 6 is an explanatory diagram showing a conventional example.
FIG. 7 is an explanatory view showing heat sealing of a window pasting film in a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base material sheet 2 ... Film sheet 4 ... Window sticking film 5 ... Seal head 6 ... Seal receiver 11 ... Sealing device 12 ... Head part 13 ... Pusher 15 ... Push-down means 17 ... Lower board material 18 ... Upper board material 19 ... Restraint means 23 ... Coutlet C ... Moving height position D of film sheet ... Moving height position of substrate sheet

Claims (2)

A base sheet for a paper container having a spout opened between a seal head and a seal receiver that are provided relative to each other, and a film sheet that is positioned above and is formed by cutting and forming a window pasting film in a separable manner. After intermittently moving, the spout of the base sheet and the windowed film of the film sheet are positioned between the seal head and the seal receiver, and then the window heading film is overlapped with the seal head and the seal receiver. In a sealing method in which the spout is covered with a window pasting film after heat sealing to the spout,
The base sheet and the film sheet are moved at a moving height position where they are separated from each other on the fixed position of the seal receiver,
Place the film sheet with the window-laminated film on the seal receiver in a constrained state, and place it on the upper surface of the seal receiver by pushing it down together with the base sheet from the respective moving height position before stacking the descending seal head. And
After heat sealing the window pasting film to the spout side with the lowered seal head, the seal head is raised and returned to the standby position,
Ascending and returning to the moving height position while restraining the film sheet with the rising return of the seal head,
A method for sealing a window-attached film, comprising separating the window-attached film heat-sealed on the spout side from the film sheet by vertical separation from the base sheet when the film sheet is lifted and returned. A base sheet for a paper container having a spout opened between a seal head and a seal receiver which are vertically disposed relative to each other, and a film sheet which is positioned above and is formed by cutting and forming a window pasting film in a separable manner In the apparatus for heat-sealing the window pasting film to the spout side by sandwiching the base sheet and the film sheet by overlapping the seal head and the seal receiver,
Between the position-fixed seal receiver and the seal head that can be moved up and down above the seal receiver, the base sheet and the film sheet that are separated from each other in the moving height position are passed through,
A push-down means for pushing down the base sheet and the film sheet to the seal receiving side before the lowering seal head is overlapped is provided so that the seal head can protrude and retract,
The upper side and the lower side of the film sheet are made of plates that can be lowered and positioned corresponding to the push-down means. And a restraining means for raising and returning the film sheet to a moving height position while restraining the film sheet as the push-down means rises.

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